JP2008087103A - Scale remover and scale removing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accelerate a scale removing speed by using spherical zircon beads in a scale remover, and to remarkably shorten the time of a scale removing step by moving a round bar-like workpiece rapidly. <P>SOLUTION: The jet directions of three spray nozzles 4A, 4B, 4C are angled at 120° each other, and set so that high pressure water is surely sprayed on the whole circumference of the round bar-like workpiece W1. The spherical zircon beads ZB as almost true spherical fine particles are mixed in water filled in a device body 2. When the high pressure water is jetted from the three spray nozzles 4A, 4B, 4C, the zircon beads are sucked into the stream, and sprayed on the surface of the workpiece 1 at a high speed about three times as high as the velocity of sound (Mach 3) together with the high pressure water. That scrapes away and removes the scale on the surface of the workpiece W1 rapidly. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention mixes spherical fine particles such as spherical zircon beads into a liquid, and injects a high-pressure liquid together with spherical fine particles from an injection nozzle while moving a long round bar-shaped workpiece in the liquid. Thus, the present invention relates to a scale removal apparatus and a scale removal method that can reliably remove the scale of the surface of a long round bar-shaped workpiece in an extremely short time.

  In order to produce thin metal wires such as stainless steel wires, the mill scale (on the surface of metal rods / wires) before metal wires or metal wires are mechanically drawn and thinned ( If the scale (oxide film) including the black film) is not completely removed, disconnection may occur from the scale portion. Therefore, the scale removal (descaling) step before drawing is very important. However, in the conventional scale removal process, for example, in the case of a stainless steel wire, a salt bath with caustic soda, sodium nitrate, etc. and pickling with hydrofluoric acid have caused a problem of generation of waste water.

  Therefore, in the invention described in Patent Document 1, for the purpose of eliminating pollution in the descaling process of the stainless steel wire, the surface of the wire is removed by brushing after striking the hard substance powder by air blasting to remove the scale. We propose a method for descaling stainless steel wire rods that smoothes and removes hard substance powder that has penetrated the wire surface. Further, in the invention described in Patent Document 2, the method is a mechanical surface treatment method for a wire / bar, wherein the hardness of the surface of the material to be processed is determined in a step of performing descaling of the wire / bar by shot blasting. We have proposed a surface treatment method for wire / bar material that blasts amorphous fine particles with higher hardness toward the surface from the outer peripheral direction of the wire / bar material to be treated.

  According to these methods, the salt bath and pickling steps as in the prior art are not required, so that the environmental problem due to the generation of waste water is solved. However, in descaling by blasting in air as in these methods, another environmental problem of dust generation arises. In addition, a large amount of blasting material is required to remove the entire scale of the wire or rod as the material to be processed by blasting in the air, which increases the processing cost. is there.

  Therefore, in the invention described in Patent Document 3, as a surface processing apparatus that uniformly and efficiently processes the surface of a material to be processed, it is mounted in a tank containing an abrasive mixed liquid and an abrasive mixed liquid in the tank. A nozzle device that ejects a processing fluid at a high pressure toward the processing target surface of the workpiece to be processed, a drive mechanism that moves the nozzle device relative to the target surface, and a pump device that pressurizes and supplies the processing liquid to the nozzle device In-liquid surface processing equipment with

According to this submerged surface processing apparatus, the abrasive in the abrasive mixture liquid is engulfed by the high-pressure fluid ejected from the nozzle device toward the surface of the object to be processed, and the surface to be processed of the object to be processed together with the high-pressure fluid As a result, the blast effect is obtained even if no abrasive is mixed in the high-pressure fluid, and it is not necessary to continuously supply the abrasive from the outside, and it is mixed in the abrasive mixture in the tank in advance. Since only the used abrasive is used, the overall cost can be reduced.
JP-A-6-182429 JP 2003-181761 A JP 2002-113663 A

  However, when the submerged surface processing apparatus as described in Patent Document 3 is applied to the scale removal of the wire / bar material as described in Patent Document 1 and Patent Document 2, as an abrasive, In general, angular particles are used, which may easily damage the surface of the wire or bar, and may cause breakage.In addition, angular particles are easily broken by the impact of collision, so continuous use is actually difficult. New abrasives must be replenished regularly. Furthermore, in removing the scale of the wire / bar, it is necessary to process the wire / bar while winding it, and it is impossible to process the wire / bar while rotating. However, such an injection nozzle has a problem that the outer peripheral surface of the wire or bar cannot be blasted evenly.

  Therefore, the present invention mixes spherical fine particles such as spherical zircon beads in a liquid as an abrasive material, and has one or more spray nozzles on the entire outer peripheral surface of the wire / bar. Scale removal device and scale removal method that can remove scales evenly at a significantly low cost without damaging wires and rods, with high efficiency of scale removal, by fixing or moving so as to spray It is an issue to provide.

  The scale removing device according to the invention of claim 1 is a device that removes the scale generated on the surface of a long round bar-shaped workpiece, and a device main body capable of filling a liquid to a predetermined height; The sealed work material inlet for inserting the round bar-like work material provided on the side surface of the apparatus main body into the apparatus main body, and the height of the work material inlet on the side surface of the apparatus main body at substantially the same height. A line connecting the workpiece outlet and the workpiece outlet, and a sealed workpiece outlet for taking out the round bar-like workpiece provided at a position substantially symmetrical to the workpiece inlet from the apparatus main body. A high-pressure liquid is applied to the surface of the round bar-shaped workpiece from two directions which are fixed at a predetermined distance and fixed below a predetermined height at which the liquid in the apparatus main body is filled, and at an angle of about 180 degrees to each other. Two jets that jet And a high-pressure pump for supplying the high-pressure liquid to the two injection nozzles, wherein the liquid and the high-pressure liquid are the same liquid, and the two injection nozzles are in the shape of the round bar. A true sphere that is provided so as to eject the high-pressure liquid to positions shifted from each other in the longitudinal direction of the workpiece, fills the liquid up to the predetermined height, and has a higher hardness than the round bar-shaped workpiece as an abrasive. The round bar-like work material is mixed by moving the round bar-like work material through the apparatus body while jetting the high-pressure liquid from the two jet nozzles. It is intended to remove the surface scale.

  Here, the “round bar-shaped workpiece” includes not only a round bar having a thickness of 5 mm to 10 mm or more but also a thinner linear workpiece (wire).

  The scale removing device according to the invention of claim 2 is a device for removing scale generated on the surface of a long round bar-shaped workpiece, and a device main body capable of filling a liquid to a predetermined height; The sealed work material inlet for inserting the round bar-like work material provided on the side surface of the apparatus main body into the apparatus main body, and the height of the work material inlet on the side surface of the apparatus main body at substantially the same height. A line connecting the workpiece outlet and the workpiece outlet, and a sealed workpiece outlet for taking out the round bar-like workpiece provided at a position substantially symmetrical to the workpiece inlet from the apparatus main body. The round bar-like shape from three directions at an angle within a range of about 95 degrees to about 170 degrees with respect to each other, which is fixed below a predetermined height at which the liquid in the apparatus body is filled at a predetermined distance from On the surface of the workpiece Three or more injection nozzles for injecting pressurized liquid, and a high-pressure pump for supplying the high-pressure liquid to the three or more injection nozzles, wherein the liquid and the high-pressure liquid are the same liquid, Three or more spray nozzles are provided so as to spray the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece, fill the liquid up to the predetermined height, and serve as an abrasive. A spherical fine particle close to a true sphere whose hardness is higher than that of a round bar-shaped workpiece is mixed, and the round bar-shaped workpiece is passed through the apparatus main body while jetting the high-pressure liquid from the three or more spray nozzles. By removing the scale, the scale on the surface of the round bar-shaped workpiece is removed.

  Here, “at least” refers to “3 directions”, and means that the high pressure liquid is ejected from 3 or more directions to 3 or more ejection nozzles. If it has “from four directions angled within a range of about 20 degrees to about 160 degrees from each other”, and if it has five injection nozzles, “within a range of about 20 degrees to about 150 degrees to each other” “From five directions with angles”.

  The scale removing apparatus according to the invention of claim 3 is an apparatus for removing scales generated on the surface of a long round bar-shaped workpiece, and an apparatus main body capable of filling a liquid to a predetermined height; The sealed work material inlet for inserting the round bar-like work material provided on the side surface of the apparatus main body into the apparatus main body, and the height of the work material inlet on the side surface of the apparatus main body at substantially the same height. A line connecting the workpiece outlet and the workpiece outlet, and a sealed workpiece outlet for taking out the round bar-like workpiece provided at a position substantially symmetrical to the workpiece inlet from the apparatus main body. A high-pressure liquid is applied to the surface of the round bar-shaped workpiece from two directions which are fixed at a predetermined distance and fixed below a predetermined height at which the liquid in the apparatus main body is filled, and at an angle of about 180 degrees to each other. And the round rod-like covering Two injection nozzles for injecting spherical fine particles whose hardness is higher than that of the material, a high-pressure pump for supplying the high-pressure liquid to the two injection nozzles, and the two injection nozzles to the sphere A spherical fine particle supply device for supplying near spherical fine particles to be mixed into the high-pressure liquid, wherein the liquid and the high-pressure liquid are the same liquid, and the two injection nozzles are formed in the round bar-shaped covering. It is provided so that the high-pressure liquid is ejected at positions shifted from each other in the longitudinal direction of the workpiece, and the liquid is filled up to the predetermined height in the apparatus main body, and spherical fine particles close to the true sphere are mixed. A scale on the surface of the round bar-like workpiece is removed by moving the round bar-like workpiece through the apparatus body while jetting the high-pressure liquid from the two jet nozzles. .

  The scale removing device according to the invention of claim 4 is a device that removes the scale generated on the surface of a long round bar-shaped workpiece, and a device main body capable of filling a liquid to a predetermined height; The sealed work material inlet for inserting the round bar-like work material provided on the side surface of the apparatus main body into the apparatus main body, and the height of the work material inlet on the side surface of the apparatus main body at substantially the same height. A line connecting the workpiece outlet and the workpiece outlet, and a sealed workpiece outlet for taking out the round bar-like workpiece provided at a position substantially symmetrical to the workpiece inlet from the apparatus main body. The round bar-like shape from three directions at an angle within a range of about 95 degrees to about 170 degrees with respect to each other, which is fixed below a predetermined height at which the liquid in the apparatus body is filled at a predetermined distance from On the surface of the workpiece Three or more injection nozzles for injecting spherical fine particles close to a true sphere whose hardness is higher than that of the pressure liquid and the round bar-shaped workpiece; and a high-pressure pump for supplying the high-pressure liquid to the three or more injection nozzles; A spherical fine particle supply device that supplies spherical fine particles close to the true sphere to the three or more spray nozzles and mixes in the high pressure liquid, and the liquid and the high pressure liquid are the same liquid, The three or more spray nozzles are provided so as to spray the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece, and the liquid is sprayed to the predetermined height in the apparatus main body. The round bar shape is formed by moving the round bar-shaped workpiece through the apparatus body while spraying the high-pressure liquid filled with spherical fine particles close to the true sphere from the three or more spray nozzles. Cover It is intended to remove the scale of the surface of Industrial Materials.

  A scale removing device according to a fifth aspect of the present invention is the scale removing device according to any one of the first to fourth aspects, further comprising: one partition plate that separates the two injection nozzles from each other, or the three or more It has two or more partition plates that separate the injection nozzles from each other.

  The scale removing device according to a sixth aspect of the present invention is the scale removing device according to any one of the first to fifth aspects, wherein the two spray nozzles or the three or more spray nozzles are formed of the round bar-shaped workpiece. It is provided in the integral support block of the surrounding shape.

  A scale removing device according to a seventh aspect of the present invention is the scale removing device according to any one of the first to sixth aspects, wherein all or part of the two spray nozzles or the three or more spray nozzles are shaped like the round bar. It is attached so as to face the direction opposite to the moving direction of the workpiece.

  The scale removing method according to the invention of claim 8 is a method for removing scale generated on the surface of a long round bar-shaped workpiece, and has a higher hardness as an abrasive than the round bar-shaped workpiece. The entire circumference of the round bar-shaped workpiece is obtained by spraying the same liquid at a high pressure from the jet nozzle in the liquid while passing the round bar-shaped workpiece through the liquid containing spherical fine particles close to a true sphere. The spray nozzle is moved so that the high-pressure liquid is sprayed on, or a plurality of the spray nozzles are fixed around the position where the round bar-shaped workpiece passes, and the entire circumference of the round bar-shaped workpiece is fixed. High pressure liquid is sprayed on

 The scale removal method according to the invention of claim 9 is a method for removing scale generated on the surface of a long round bar-shaped workpiece, while passing the round bar-shaped workpiece through a liquid, The same liquid in which spherical fine particles close to a true sphere whose hardness is higher than that of the round bar-like workpiece is mixed as an abrasive is jetted from the jet nozzle at high pressure in the liquid, so that the entire circumference of the round bar-like workpiece is obtained. The spray nozzle is moved so that a high-pressure liquid mixed with spherical fine particles close to the true sphere is sprayed, or a plurality of the spray nozzles are fixed around the position where the round bar-shaped workpiece passes. Thus, a high-pressure liquid in which spherical fine particles close to the true sphere are mixed is sprayed on the entire circumference of the round bar-shaped workpiece.

  The scale removing apparatus or the scale removing method according to the invention of claim 10 is the structure according to any one of claims 1 to 9, wherein the distance from the tip of the injection nozzle to the surface of the round bar-shaped workpiece is set. It is within the range of 25 mm to 70 mm.

  The scale removing device or the scale removing method according to the invention of claim 11 is the structure according to any one of claims 1 to 10, wherein the jet nozzle diameter of the jet nozzle is within a range of 0.1 mm to 6 mm. is there.

  The scale removing apparatus or scale removing method according to the invention of claim 12 is the structure according to any one of claims 1 to 11, wherein the spherical fine particles close to a true sphere having a hardness higher than that of the round bar-shaped workpiece are obtained. It is a spherical fine particle close to a true sphere having a specific gravity of 3.0 or more and 7.0 or less.

  The scale removing apparatus or scale removing method according to the invention of claim 13 is the structure of claim 12, wherein the spherical fine particles having a specific gravity of 3.0 to 7.0 are spherical zircon beads. .

  The scale removal apparatus or scale removal method according to the invention of claim 14 is the structure of claim 13, wherein the spherical zircon beads have a particle diameter in the range of 10 μm to 800 μm.

  According to a fifteenth aspect of the present invention, there is provided the scale removing apparatus or the scale removing method according to any one of the first to fourteenth aspects, wherein the velocity of the high-pressure liquid ejected from the ejection nozzle is the speed of sound in the atmosphere (about 332 m). / Sec) or more.

  A scale removing apparatus or a scale removing method according to a sixteenth aspect of the present invention is the structure according to any one of the first to fifteenth aspects, wherein the spherical fine particles close to the true sphere injected onto the round bar-shaped workpiece. Is separated from the scale scraped off from the round bar-shaped workpiece and recovered and reused.

  The scale removing device according to the invention of claim 1 is a device that removes the scale generated on the surface of a long round bar-shaped workpiece, and a device main body capable of filling a liquid to a predetermined height; A sealed work piece entrance into which the round bar-like work material provided on the side surface of the apparatus main body is inserted into the apparatus main body, and the work material inlet at substantially the same height as the work material inlet on the side face of the apparatus main body. Take a round bar-shaped workpiece provided at a symmetric position from the inside of the main body of the device and separate it from the line connecting the workpiece inlet and the outlet of the workpiece by a predetermined distance. Two injection nozzles for injecting high-pressure liquid onto the surface of the round bar-shaped workpiece from two directions fixed at an angle of about 180 degrees to each other and fixed below a predetermined height at which the liquid is filled; High pressure port for supplying high pressure liquid to the injection nozzle The liquid and the high-pressure liquid are the same liquid, and the two injection nozzles are provided to inject the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece. It fills the liquid up to a predetermined height, mixes spherical fine particles close to a true sphere whose hardness is higher than that of a round bar-shaped workpiece as an abrasive, and round bar-shaped while jetting high-pressure liquid from two jet nozzles The scale on the surface of the round bar-shaped workpiece is removed by moving the workpiece through the apparatus body.

  By having such a configuration, when high pressure liquid is jetted from two jet nozzles in the liquid, spherical fine particles close to a true sphere having a hardness higher than that of a round bar-shaped workpiece are caught in the high pressure liquid jetted at high speed. Then, it collides with the surface of the round bar-shaped workpiece together with the high-pressure liquid to remove the scale on the surface of the round bar-shaped workpiece. At this time, spherical fine particles that are closer to the true sphere than the angular fine particles that are normally used as abrasives are more likely to be entrained in the high-pressure liquid and not only damage the surface of the round bar-shaped workpiece, but also the true fine particles. Spherical fine particles close to a sphere themselves are hardly broken.

  The two injection nozzles are fixed so as to inject high-pressure liquid onto the surface of the round bar-shaped workpiece from two directions at an angle of about 180 degrees with each other. A spherical fine particle close to a true sphere collides with the entire circumference of the surface of the workpiece together with the high-pressure liquid, and the scale of the entire circumference can be removed evenly. Furthermore, spherical fine particles close to true spheres are hardly worn even when the scale is removed as an abrasive, so that they can be used semi-permanently, and it is possible to remove the scale of a round bar-shaped workpiece at a very low cost. It can be carried out.

  In addition, since spherical fine particles close to the true sphere ride on the flow velocity of the high-speed liquid flow, it is necessary to use a high-pressure liquid of 100 MPa to 150 MPa in the scale removal process using a conventional abrasive (silica sand, alumina powder, etc.). On the other hand, since the same effect can be obtained even if the pressure of the high-pressure liquid is reduced to 5 MPa to 50 MPa, the life of the high-pressure pump, the high-pressure pipe and the injection nozzle can be greatly extended.

  In this way, spherical particles close to a true sphere are mixed in the liquid as an abrasive, and two injection nozzles are installed so as to inject high-pressure liquid over the entire outer surface of the round bar-shaped workpiece. By fixing, it becomes a scale removal device that does not damage the round bar-shaped workpiece, has high scale removal efficiency, and can remove scales evenly at extremely low cost.

  The scale removing device according to the invention of claim 2 is a device for removing scale generated on the surface of a long round bar-shaped workpiece, and a device main body capable of filling a liquid to a predetermined height; A sealed work piece entrance into which the round bar-like work material provided on the side surface of the apparatus main body is inserted into the apparatus main body, and the work material inlet at substantially the same height as the work material inlet on the side face of the apparatus main body. Take a round bar-shaped workpiece provided at a symmetric position from the inside of the main body of the device and separate it from the line connecting the workpiece inlet and the outlet of the workpiece by a predetermined distance. Three jets of high-pressure liquid onto the surface of a round bar-shaped workpiece from three directions that are fixed below a predetermined height at which the liquid is filled and are angled within a range of at least about 95 degrees to about 170 degrees relative to each other More than three injection nozzles and more than three A high-pressure pump for supplying high-pressure liquid to the injection nozzle, and the liquid and the high-pressure liquid are the same liquid, and the three or more injection nozzles are located at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece. It is provided to inject high-pressure liquid, fills the liquid up to a predetermined height, mixes spherical fine particles close to a true sphere with a hardness higher than that of a round bar-shaped workpiece as an abrasive, and injects three or more The scale on the surface of the round bar-shaped workpiece is removed by moving the round bar-shaped workpiece through the apparatus body while jetting high-pressure liquid from the nozzle.

  By having such a configuration, when high-pressure liquid is ejected from three or more ejection nozzles in the liquid, spherical fine particles close to a true sphere having a hardness higher than that of a round bar-shaped workpiece are entrained in the high-pressure liquid ejected at high speed. The high-pressure liquid collides with the surface of the round bar-shaped workpiece, and the scale of the surface of the round bar-shaped workpiece is removed. At this time, spherical fine particles that are closer to the true sphere than the angular fine particles that are normally used as abrasives are more likely to be entrained in the high-pressure liquid and not only damage the surface of the round bar-shaped workpiece, but also the true fine particles. Spherical fine particles close to a sphere themselves are hardly broken.

  The three or more injection nozzles are fixed so as to inject high-pressure liquid onto the surface of the round bar-shaped workpiece from at least three directions angled within a range of about 95 degrees to about 170 degrees. Therefore, the spherical fine particles close to the true sphere collide with the high-pressure liquid surely by the entire circumference of the surface of the moving round bar-like workpiece, and the scale of the entire circumference can be removed more reliably and uniformly. Moreover, since the scale removal efficiency is improved by installing three or more spray nozzles, the round bar-shaped workpiece can be moved faster, and the scale removal process time can be shortened.

  Here, as described above, when there are three injection nozzles, they are fixed at an angle within a range of about 95 degrees to about 170 degrees, but when there are four injection nozzles, they are about 20 degrees each other. 4 directions with an angle within a range of about 160 degrees, and when there are five injection nozzles, the directions become 5 directions with an angle within a range of about 20 degrees to about 150 degrees with respect to each other. The mutual angle changes depending on the number.

  Furthermore, spherical fine particles close to true spheres are hardly worn even when the scale is removed as an abrasive, so that they can be used semi-permanently, and it is possible to remove the scale of a round bar-shaped workpiece at a very low cost. It can be carried out. In addition, since spherical fine particles close to the true sphere ride on the flow velocity of the high-speed liquid flow, it is necessary to use a high-pressure liquid of 100 MPa to 150 MPa in the scale removal process using a conventional abrasive (silica sand, alumina powder, etc.). On the other hand, since the same effect can be obtained even if the pressure of the high-pressure liquid is reduced to 5 MPa to 50 MPa, the life of the high-pressure pump, the high-pressure pipe and the injection nozzle can be greatly extended.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as the abrasive, and at least three injection nozzles are used to inject the high-pressure liquid over the entire outer peripheral surface of the round bar-shaped workpiece. By installing and fixing, the scale removing device can remove the scale more reliably and uniformly at a significantly lower cost without damaging the round bar-shaped workpiece and with high scale removing efficiency.

  The scale removing apparatus according to the invention of claim 3 is an apparatus for removing scales generated on the surface of a long round bar-shaped workpiece, and an apparatus main body capable of filling a liquid to a predetermined height; A sealed work piece entrance into which the round bar-like work material provided on the side surface of the apparatus main body is inserted into the apparatus main body, and the work material inlet at substantially the same height as the work material inlet on the side face of the apparatus main body. Take a round bar-shaped workpiece provided at a symmetric position from the inside of the main body of the device and separate it from the line connecting the workpiece inlet and the outlet of the workpiece by a predetermined distance. A sphere having a higher hardness than the high-pressure liquid and the round bar-shaped work material on the surface of the round bar-like work material from two directions fixed at an angle of about 180 degrees to each other and fixed below a predetermined height at which the liquid is filled Two jets of spherical particles close to A spray nozzle, a high-pressure pump that supplies high-pressure liquid to two spray nozzles, and a spherical microparticle supply device that supplies spherical particles close to a true sphere to the two spray nozzles and mixes into the high-pressure liquid, The liquid and the high-pressure liquid are the same liquid, and the two injection nozzles are provided so as to inject the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece. A round bar-shaped work piece is moved by penetrating the apparatus body through the apparatus body while spraying high-pressure liquid filled with liquid up to a predetermined height and containing spherical fine particles close to a true sphere from two spray nozzles. Remove the scale on the surface of the workpiece.

  By having such a configuration, when high-pressure liquid in which spherical fine particles close to a true sphere are mixed from two injection nozzles in the liquid, spherical fine particles close to a true sphere having a hardness higher than that of a round bar-shaped workpiece are obtained. It collides with the surface of the round bar-shaped workpiece at high speed together with the high-pressure liquid, and removes the scale on the surface of the round bar-shaped workpiece more powerfully and reliably. At this time, the spherical fine particles closer to the true sphere than the angular fine particles usually used as an abrasive do not damage the surface of the round bar-shaped workpiece, and almost the spherical fine particles themselves are almost spherical. It will not crack.

  The two injection nozzles are fixed so as to inject high pressure liquid mixed with spherical fine particles close to a true sphere on the surface of the round bar-shaped workpiece from two directions at an angle of about 180 degrees. Therefore, spherical fine particles close to a true sphere collide with the high-pressure liquid all around the surface of the moving round bar-shaped workpiece, and the scale around the entire circumference can be removed evenly. Furthermore, spherical fine particles close to true spheres are hardly worn even when the scale is removed as an abrasive, so that they can be used semi-permanently, and it is possible to remove the scale of a round bar-shaped workpiece at a very low cost. It can be carried out.

  In addition, since spherical fine particles close to the true sphere ride on the flow velocity of the high-speed liquid flow, it is necessary to use a high-pressure liquid of 100 MPa to 150 MPa in the scale removal process using a conventional abrasive (silica sand, alumina powder, etc.). On the other hand, since the same effect can be obtained even if the pressure of the high-pressure liquid is reduced to 5 MPa to 50 MPa, the life of the high-pressure pump, the high-pressure pipe and the injection nozzle can be greatly extended.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and two injection nozzles are used to form spherical fine particles close to a true sphere on the entire outer peripheral surface of the round bar-shaped workpiece. A scale removal device that can remove scales evenly at a very low cost without damaging the round bar-shaped work material by installing and fixing the mixed high-pressure liquid so that it is ejected. It becomes.

  The scale removing device according to the invention of claim 4 is a device that removes the scale generated on the surface of a long round bar-shaped workpiece, and a device main body capable of filling a liquid to a predetermined height; A sealed work piece entrance into which the round bar-like work material provided on the side surface of the apparatus main body is inserted into the apparatus main body, and the work material inlet at substantially the same height as the work material inlet on the side face of the apparatus main body. Take a round bar-shaped workpiece provided at a symmetric position from the inside of the main body of the device and separate it from the line connecting the workpiece inlet and the outlet of the workpiece by a predetermined distance. The high pressure liquid and the round bar-shaped workpiece are applied to the surface of the round bar-shaped workpiece from three directions which are fixed below a predetermined height at which the liquid is filled and are angled within a range of at least about 95 degrees to about 170 degrees with respect to each other. Close to a true sphere that is harder than the workpiece Three or more injection nozzles for injecting fine particles, a high-pressure pump for supplying high-pressure liquid to three or more injection nozzles, and a high-pressure liquid by supplying spherical particles close to a true sphere to three or more injection nozzles The liquid and the high-pressure liquid are the same liquid, and the three or more spray nozzles supply the high-pressure liquid to positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece. A round bar-shaped workpiece that is provided so as to be sprayed and that is filled with liquid up to a predetermined height in the apparatus main body and sprays high-pressure liquid mixed with spherical fine particles close to a true sphere from three or more spray nozzles Is removed by penetrating the apparatus main body to remove the scale on the surface of the round bar-shaped workpiece.

  By having such a configuration, when a high pressure liquid in which spherical fine particles close to a true sphere are mixed from three or more injection nozzles in the liquid is injected, a spherical fine particle close to a true sphere having a hardness higher than that of a round bar-shaped workpiece. Collides with the surface of the round bar-shaped workpiece at high speed together with the high-pressure liquid, and removes the scale on the surface of the round bar-shaped workpiece more powerfully and reliably. At this time, the spherical fine particles closer to the true sphere than the angular fine particles usually used as an abrasive do not damage the surface of the round bar-shaped workpiece, and almost the spherical fine particles themselves are almost spherical. It will not crack.

  In addition, spherical particles close to a true sphere are mixed into the surface of the round bar-shaped workpiece from at least three directions in which three or more such injection nozzles are angled within a range of about 95 degrees to about 170 degrees. Since the high-pressure liquid is fixed so that it can be ejected, spherical particles close to a true sphere collide with the high-pressure liquid reliably by the entire circumference of the surface of the moving round bar-shaped workpiece, and the scale of the whole circumference is reduced. It can be removed more reliably and uniformly. Moreover, since the scale removal efficiency is improved by installing three or more spray nozzles, the round bar-shaped workpiece can be moved faster, and the scale removal process time can be shortened.

  Here, as described above, when there are three injection nozzles, they are fixed at an angle within a range of about 95 degrees to about 170 degrees, but when there are four injection nozzles, they are about 20 degrees each other. 4 directions with an angle within a range of about 160 degrees, and when there are five injection nozzles, the directions become 5 directions with an angle within a range of about 20 degrees to about 150 degrees with respect to each other. The mutual angle changes depending on the number.

  Furthermore, spherical fine particles close to true spheres are hardly worn even when the scale is removed as an abrasive, so that they can be used semi-permanently, and it is possible to remove the scale of a round bar-shaped workpiece at a very low cost. It can be carried out. In addition, since spherical fine particles close to the true sphere ride on the flow velocity of the high-speed liquid flow, it is necessary to use a high-pressure liquid of 100 MPa to 150 MPa in the scale removal process using a conventional abrasive (silica sand, alumina powder, etc.). On the other hand, since the same effect can be obtained even if the pressure of the high-pressure liquid is reduced to 5 MPa to 50 MPa, the life of the high-pressure pump, the high-pressure pipe and the injection nozzle can be greatly extended.

  In this manner, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and three or more spray nozzles are formed on the entire outer peripheral surface of the round bar-like work piece to obtain a spherical fine particle close to a true sphere. By installing and fixing so that high-pressure liquid mixed with water can be ejected, the round bar-shaped workpiece will not be damaged, scale removal efficiency will be high, and scale can be removed more reliably and evenly at a significantly lower cost. It becomes a scale remover that can.

  The scale removing device according to the invention of claim 5 further includes one partition plate that partitions the two spray nozzles from each other or two or more partition plates that partition the three or more spray nozzles from each other. In the scale removing device according to the first to fourth aspects of the present invention, as described above, two or three or more pieces are used so that the high-pressure liquid is ejected to positions shifted from each other in the longitudinal direction of the workpiece. Since the injection nozzle is provided, the injected high-pressure liquids do not collide with each other from the front, but two or three or more injection nozzles are provided close to each other in the longitudinal direction of the workpiece. In this case, the flow of the jetted high-pressure liquid interferes with each other and the momentum is weakened, and the scale removal capability may be reduced.

  Therefore, by providing a partition plate that separates each other between the jet nozzles provided close to each other in the longitudinal direction of the workpiece, the flow of the jetted high-pressure liquid is prevented from interfering with each other, It is possible to reliably eliminate the possibility that the scale removal capability of the high-pressure liquid or spherical fine particles close to a true sphere mixed therein will be reduced.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and two or more injection nozzles are used to form spherical fine particles close to a true sphere on the entire outer peripheral surface of the round bar-shaped workpiece. The round bar-shaped workpiece is damaged by installing and fixing the mixed high-pressure liquid so as to be jetted and by providing a partition plate between the jet nozzles provided close to each other in the longitudinal direction of the workpiece. Therefore, the scale removal efficiency is high, and the scale removal device can remove the scale more reliably and uniformly at a significantly lower cost.

  In the scale removing device according to the sixth aspect of the present invention, two spray nozzles or three or more spray nozzles are provided on an integral support block having a shape surrounding a round bar-shaped workpiece. As a result, the angle between the spray nozzles can be easily set to a desired angle, the installation space for two or more spray nozzles can be made compact, and the apparatus body of the scale removing device can be made more compact. be able to.

  In this manner, spherical fine particles such as spherical zircon beads are mixed in the liquid as an abrasive, and two or more spray nozzles are used to spray high-pressure liquid over the entire outer peripheral surface of the round bar-shaped workpiece. By installing and fixing in such a way, the scale bar can be removed evenly at a very low cost without damaging the round bar-shaped workpiece, with high scale removal efficiency, and at a very low cost. It becomes.

  In the scale removing device according to the invention of claim 7, all or a part of the two injection nozzles or the three or more injection nozzles are inclined obliquely in the opposite direction to the moving direction of the round bar-shaped workpiece. Installed. While proceeding with the experiment of the scale removing device, the inventors attached the injection nozzle obliquely in the direction opposite to the moving direction of the round bar-shaped workpiece, and the high-pressure liquid moved in the direction of the round bar-shaped workpiece. The inventors have found that the scale can be removed more efficiently by being sprayed obliquely in the opposite direction, and the present invention has been completed based on this finding.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and two or more injection nozzles are installed so as to inject high-pressure liquid over the entire outer peripheral surface of the round bar-shaped workpiece. By fixing, it becomes a scale removal device that does not damage the round bar-shaped workpiece, has high scale removal efficiency, and can remove scales evenly at extremely low cost.

  The scale removal method according to the invention of claim 8 is a method for removing scale generated on the surface of a long round bar-shaped workpiece, and is a true material having a hardness higher than that of a round bar-shaped workpiece as an abrasive. While passing a round bar-shaped workpiece through a liquid containing spherical fine particles close to a sphere, the same liquid is jetted from the spray nozzle at high pressure in the liquid, and the high-pressure liquid is applied to the entire circumference of the round bar-shaped workpiece. The spray nozzle is moved so that it can be sprayed, or a plurality of spray nozzles are fixed around the position where the round bar-shaped workpiece passes, and the high pressure liquid is sprayed around the entire circumference of the round bar-shaped workpiece.

  According to this method, when the high pressure liquid is ejected from the ejection nozzle in the liquid, spherical fine particles having a hardness close to a true sphere having a higher hardness than that of the round bar-shaped workpiece are entrained in the high pressure liquid ejected at a high speed. At the same time, it collides with the surface of the round bar-shaped workpiece, and the scale on the surface of the round bar-shaped workpiece is removed. At this time, spherical fine particles that are closer to the true sphere than the angular fine particles that are normally used as abrasives are more likely to be entrained in the high-pressure liquid and not only damage the surface of the round bar-shaped workpiece, but also the true fine particles. Spherical fine particles close to a sphere themselves are hardly broken.

  Then, by moving such an injection nozzle or by allowing a plurality of high-pressure liquids to be injected to be sprayed around the entire circumference of the round bar-shaped workpiece, the round bar-shaped workpiece is moved. Spherical fine particles close to a true sphere collide with the high-pressure liquid all around the surface of the surface, and the scales around the entire circumference can be removed evenly. Furthermore, spherical fine particles close to true spheres are hardly worn even when the scale is removed as an abrasive, so that they can be used semi-permanently, and it is possible to remove the scale of a round bar-shaped workpiece at a very low cost. It can be carried out.

  In addition, since spherical fine particles close to the true sphere ride on the flow velocity of the high-speed liquid flow, it is necessary to use a high-pressure liquid of 100 MPa to 150 MPa in the scale removal process using a conventional abrasive (silica sand, alumina powder, etc.). On the other hand, since the same effect can be obtained even if the pressure of the high-pressure liquid is reduced to 5 MPa to 50 MPa, the life of the high-pressure pump, the high-pressure pipe and the injection nozzle can be greatly extended.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and the high pressure liquid is sprayed from the spray nozzle onto the entire outer peripheral surface of the round bar-shaped workpiece, thereby forming a round bar-shaped target. This is a scale removal method that does not damage the workpiece, has high scale removal efficiency, and can remove scales evenly at extremely low cost.

 The scale removing method according to the invention of claim 9 is a method for removing scale generated on the surface of a long round bar-shaped workpiece, and polishing while passing the round bar-shaped workpiece through the liquid. As a material, the same liquid mixed with spherical fine particles whose hardness is higher than that of a round bar-shaped workpiece is injected into the liquid at a high pressure from the spray nozzle in a liquid to form a round ball around the entire circumference of the round bar-shaped workpiece. Move the injection nozzle so that high-pressure liquid mixed with near spherical fine particles is sprayed, or fix a plurality of injection nozzles around the position where the round bar-shaped workpiece passes. A high-pressure liquid containing spherical particles close to a true sphere is sprayed around the entire circumference.

  According to this method, when a high-pressure liquid in which spherical fine particles close to a true sphere are mixed in the liquid is injected from the injection nozzle, the spherical fine particles close to a true sphere having a hardness higher than that of a round bar-shaped workpiece are high-speed together with the high-pressure liquid. It collides with the surface of the round bar-shaped workpiece and removes the scale on the surface of the round bar-shaped workpiece more powerfully and reliably. At this time, the spherical fine particles closer to the true sphere than the angular fine particles usually used as an abrasive do not damage the surface of the round bar-shaped workpiece, and almost the spherical fine particles themselves are almost spherical. It will not crack.

  Then, by moving such an injection nozzle or by fixing a plurality of such high-pressure liquids, which are mixed with spherical fine particles that are injected, the high-pressure liquid is sprayed to the entire circumference of the round bar-shaped workpiece. As a result, spherical fine particles close to a true sphere collide with the high-pressure liquid on the entire circumference of the surface of the moving round bar-like workpiece, and the scale on the entire circumference can be removed evenly. Furthermore, spherical fine particles close to true spheres are hardly worn even when the scale is removed as an abrasive, so that they can be used semi-permanently, and it is possible to remove the scale of a round bar-shaped workpiece at a very low cost. It can be carried out.

  In addition, since spherical fine particles close to the true sphere ride on the flow velocity of the high-speed liquid flow, it is necessary to use a high-pressure liquid of 100 MPa to 150 MPa in the scale removal process using a conventional abrasive (silica sand, alumina powder, etc.). On the other hand, since the same effect can be obtained even if the pressure of the high-pressure liquid is reduced to 5 MPa to 50 MPa, the life of the high-pressure pump, the high-pressure pipe and the injection nozzle can be greatly extended.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and the injection nozzle is moved, or a plurality of them are fixed to the entire outer peripheral surface of the round bar-like workpiece. By removing high-pressure liquid mixed with spherical fine particles close to, scale removal can be performed uniformly at a very low cost without damaging the round bar-shaped workpiece, with high scale removal efficiency. Become a method.

  In the scale removing apparatus or the scale removing method according to the invention of claim 10, the distance from the tip of the injection nozzle to the surface of the round bar-shaped workpiece is in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm. is there. As a result of repeated earnest experiment research on the conditions for removing scale generated on the surface of the round bar-shaped workpiece most effectively, the present inventors have conducted research from the tip of the injection nozzle to the surface of the round bar-shaped workpiece. It has been found that the scale can be efficiently removed when the distance is within the range of 25 mm to 70 mm, more preferably within the range of 30 mm to 50 mm, and the present invention has been completed based on this finding.

  That is, when the distance from the tip of the injection nozzle to the surface of the round bar-shaped workpiece exceeds 70 mm, the momentum of the high-pressure liquid sprayed is weakened, so the scale cannot be removed efficiently, and the distance to the surface is 25 mm. If it is shorter, the high-pressure liquid ejected from the ejection nozzle cannot sufficiently entrap the spherical fine particles close to the true sphere, and the spherical fine particles close to the true sphere are mixed. In the case of the method of ejecting the high-pressure liquid, since the high-pressure liquid ejected from the ejection nozzle does not spread sufficiently, the scale removal efficiency is also lowered. Therefore, the scale can be efficiently removed when the distance from the tip of the injection nozzle to the surface of the round bar-shaped workpiece is in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and high-pressure liquid or spherical fine particles close to a true sphere are mixed on the entire outer peripheral surface of the round bar-shaped workpiece from the injection nozzle. By spraying the high pressure liquid, the scale removal device or the scale removal method can remove the scale evenly at a significantly low cost without damaging the round bar-shaped workpiece, with high scale removal efficiency. .

  In the scale removing device or the scale removing method according to the invention of claim 11, the jet nozzle diameter of the jet nozzle is in the range of about 0.1 mm to about 6 mm, more preferably in the range of about 1 mm to about 3 mm. The inventors of the present invention have conducted extensive experimental research on conditions for removing scales generated on the surface of a round bar-shaped workpiece most effectively. As a result, the injection nozzle diameter of the injection nozzle is about 0.1 mm to about 6 mm. The inventors have found that the scale can be efficiently removed when the thickness is within the range, more preferably within the range of about 1 mm to about 3 mm, and the present invention has been completed based on this finding.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and high-pressure liquid or spherical fine particles close to a true sphere are mixed on the entire outer peripheral surface of the round bar-shaped workpiece from the injection nozzle. By spraying the high pressure liquid, the scale removal device or the scale removal method can remove the scale evenly at a significantly low cost without damaging the round bar-shaped workpiece, with high scale removal efficiency. .

  In the scale removing apparatus or the scale removing method according to the invention of claim 12, the spherical fine particles close to a true sphere having a hardness higher than that of a round bar-shaped workpiece are spherical close to a true sphere having a specific gravity of 3.0 or more and 7.0 or less. Fine particles.

  By using spherical fine particles having a specific gravity of 3.0 or more, the processing speed is increased, and the round bar-shaped workpiece can be moved faster, so that the scale removal process time can be shortened. On the other hand, if the specific gravity of the spherical fine particles exceeds 7.0, the processing speed becomes too fast, and there is a risk that a defect such as dents or scratches on the round bar-shaped workpiece will occur. Therefore, the specific gravity of the spherical fine particles is preferably 3.0 or more and 7.0 or less.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and high-pressure liquid or spherical fine particles close to a true sphere are mixed on the entire outer peripheral surface of the round bar-shaped workpiece from the injection nozzle. By spraying the high pressure liquid, the scale removal device or the scale removal method can remove the scale evenly at a significantly low cost without damaging the round bar-shaped workpiece, with high scale removal efficiency. .

In the scale removing apparatus or the scale removing method according to the invention of claim 13, the spherical fine particles close to the true sphere having a specific gravity of 3.0 or more and 7.0 or less are spherical zircon beads. Spherical zircon (ZrSiO ₄ ) beads are produced by an electrolysis process at 2500 ° C. or higher, and crystalline zirconia particles surrounded by a silica phase have a high strength and smooth surface. The specific gravity is 3.8, the Mohs hardness is 7, the crushing strength is 700 N for beads having a diameter of 2 mm, and since it has a spherical shape close to a true sphere, there is no risk of scratching the round bar-shaped workpiece.

  And since it is close to a true sphere, it is difficult to wear and crush, and the most efficient injection energy can be given to the round bar-shaped workpiece, and the scale can be reliably removed by using spherical zircon beads with a specific gravity of 3.8. Since the removal speed is remarkably faster than the conventional scale removal method using an abrasive, the round bar-like workpiece can be moved faster and the scale removal process time can be shortened.

  In addition, since spherical zircon beads close to a true sphere ride on the flow velocity of a high-speed liquid flow, it was necessary to use a high-pressure liquid of 100 MPa to 150 MPa in a scale removal process using a conventional abrasive, whereas a high-pressure liquid Since the same effect can be obtained even if the pressure is reduced to 5 MPa to 50 MPa, the life of the high-pressure pump, the high-pressure pipe and the injection nozzle can be greatly extended.

  In this way, spherical zircon beads are mixed in the liquid as the abrasive as spherical fine particles close to a true sphere, and a high-pressure liquid or a sphere close to a true sphere is applied to the entire outer peripheral surface of the round bar-shaped workpiece from the injection nozzle. By spraying high-pressure liquid mixed with spherical zircon beads as fine particles, the scale can be removed uniformly at a very low cost without damaging the round bar-shaped workpiece, with high scale removal efficiency It becomes a removal apparatus or a scale removal method.

  In the scale removing apparatus or the scale removing method according to the fourteenth aspect of the present invention, the spherical zircon beads have a particle size in the range of about 10 μm to about 800 μm, more preferably in the range of about 10 μm to about 100 μm.

  By using fine spherical zircon beads with a level of several tens of μm, the fine scale on the surface of the round bar-like workpiece can be easily removed, and the processing trace becomes smoother. Further, by using a slightly larger spherical zircon bead of about 500 μm to about 800 μm, the scale removal speed becomes faster, and a large area scale can be removed in a short time.

  In this way, spherical zircon beads are mixed in the liquid as the abrasive as spherical fine particles close to a true sphere, and a high-pressure liquid or a sphere close to a true sphere is applied to the entire outer peripheral surface of the round bar-shaped workpiece from the injection nozzle. By spraying high-pressure liquid mixed with spherical zircon beads as fine particles, round rod-shaped workpieces are not damaged, scale removal efficiency is extremely high, and scales can be removed evenly at extremely low cost. A scale removing device or a scale removing method is provided.

  In the scale removing device or the scale removing method according to the fifteenth aspect of the invention, the speed of the high-pressure liquid ejected from the ejection nozzle is equal to or higher than the speed of sound in the atmosphere (about 332 m / second), that is, Mach or higher.

In air blast processing (shot peening processing) in air using spherical fine particles close to true spheres such as conventional spherical zircon beads, the processing speed is limited because the air speed cannot exceed the speed of sound. there were. However, as in the present invention, spherical fine particles close to a true sphere are mixed in the liquid, and high pressure liquid is injected from the injection nozzle to be entrained, or high pressure in which spherical fine particles close to the true sphere are mixed. By jetting the liquid, the speed of the high-pressure liquid exceeds the speed of sound in the atmosphere and reaches up to about Mach 3. Therefore, as is clear from the equation of motion of F = mv ² , it is more powerful and rounds in a short time. The scale of the surface of the rod-shaped workpiece can be removed.

  Therefore, since the scale removal speed is remarkably high, the round bar-shaped workpiece can be moved faster, and the scale removal process time can be shortened.

  In this way, spherical fine particles close to a true sphere are mixed in the liquid as an abrasive, and the high pressure liquid is sprayed from the spray nozzle to the entire outer peripheral surface of the round bar-shaped workpiece, or from the spray nozzle. By spraying a high-pressure liquid mixed with spherical fine particles close to a true sphere, the round bar-shaped workpiece is not damaged, the scale removal efficiency is extremely high, and the scale can be removed evenly at an extremely low cost. A scale removing device or a scale removing method that can be performed.

  In the scale removing apparatus or the scale removing method according to the invention of claim 16, spherical particles close to a true sphere injected on a round bar-like workpiece are separated from the scale scraped off from the round bar-like workpiece. Collect and reuse. As described above, spherical fine particles close to a true sphere are spherical and difficult to wear and crush. Therefore, if a scale that has been scraped off accumulates, it is separated from the scale and collected and reused many times. It is possible. Moreover, since it is spherical, it does not pierce the workpiece as in the case of conventional abrasive particles, so that it can be easily recovered.

  In this way, by using spherical fine particles close to a true sphere as an abrasive, it can be recovered and reused many times, running costs can be greatly reduced, and industrial waste It becomes a scale removal device or a scale removal method that can contribute to recycling that reduces the amount of waste.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
First, a scale removing apparatus and a scale removing method according to Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an overall configuration of a scale removing apparatus according to Embodiment 1 of the present invention. Fig.2 (a) is a front view which shows the structure of the support block of the scale removal apparatus concerning Embodiment 1 of this invention, (b) is a bottom view. FIG. 3 is a view showing an SEM (scanning electron microscope) photograph of spherical zircon beads as spherical fine particles close to a true sphere used in the scale removing apparatus and scale removing method according to the first embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of a spherical zircon bead collecting device used in the scale removing device and the scale removing method according to the first embodiment of the present invention.

  As shown in FIG. 1, the scale removing apparatus 1 according to the first embodiment uses a transparent acrylic resin water tank as the apparatus main body 2, and has through-holes at the same height on opposite sides in the lateral direction. And a rubber ring for sealing is attached, and a workpiece inlet 2A and a workpiece outlet 2B are provided. As shown in FIG. 1, a soft steel bar (SWRM) W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece is moved in the direction of the arrow at a predetermined speed, and enters the apparatus main body 2 from the workpiece inlet 2A. Enters and exits from the workpiece outlet 2B. A soft steel bar W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece is in a coiled state before the scale removal process, and is wound again with a large force after the scale removal process.

  A substantially U-shaped support block 3 is fixed by a support mechanism (not shown) so as to surround the round bar-shaped workpiece W1 that moves at a predetermined speed in this manner. The injection nozzles 4A, 4B, 4C are attached and fixed. The three injection nozzles 4A, 4B, and 4C are connected to high-pressure pumps 5A, 5B, and 5C that supply high-pressure water through high-pressure pipes 6A, 6B, and 6C, respectively.

  A water supply tank unit 5D is connected to these high pressure pumps 5A, 5B, 5C in order to supply water to the high pressure pumps 5A, 5B, 5C. The device body 2 is filled with water BL as a liquid mixed with spherical zircon beads as spherical fine particles close to a true sphere, and the support block 3 is supported and fixed so that the whole is immersed in the water BL. Has been.

  Further, as shown in FIG. 1 with a part of the apparatus main body 2 cut away, the substantially U-shaped support block 3 has a leg portion to which the injection nozzle 4B is attached bent toward the workpiece inlet 2A. The leg portion to which the injection nozzle 4C is attached is bent toward the workpiece outlet 2B. As a result, the high-pressure water as the high-pressure liquid ejected from the three ejection nozzles 4A, 4B, 4C is sprayed on the surface of the round bar-shaped workpiece W1 in the longitudinal direction of the workpiece W1. It is designed to shift.

  The support block 3 and the three injection nozzles 4A, 4B, 4C will be described in more detail with reference to FIG. As shown in FIG. 2 (a), the support block 3 is substantially U-shaped when viewed from the front, and the injection nozzle 4A is fixed at the center of the upper part facing downward, and the right leg portion is obliquely upward. The injection nozzle 4B faces and is fixed, and the injection nozzle 4C is fixed to the left leg portion also facing obliquely upward. As shown in FIG. 2 (a), the injection directions of these three injection nozzles 4A, 4B, and 4C are angled at about 120 degrees from each other, whereby the entire circumference of the round bar-shaped workpiece W1 is formed. It is set so that high-pressure water can be sprayed reliably.

  Further, as shown in FIG. 2A, spherical zircon beads ZB as spherical fine particles close to a true sphere are mixed in the water filled in the apparatus main body 2, and three injection nozzles When high-pressure water is injected from 4A, 4B, and 4C, spherical zircon beads ZB are caught in the flow, and the high-pressure water and the surface of the round bar-shaped workpiece W1 are about three times the speed of sound (Mach 3). As a result, the scale on the surface of the round bar-shaped workpiece W1 is scraped off and removed.

  Here, the distance d between the tips of the three injection nozzles 4A, 4B, 4C and the surface of the round bar-shaped workpiece W1 is 40 mm to 50 mm. It has been found that scale removal can be performed more efficiently by setting the distance d in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm. The reason for this is that if the distance d is too large, the momentum of the high-pressure water sprayed on the surface of the round bar-shaped workpiece W1 will be weak, and conversely if the distance d is too small, the high-pressure water will be sufficiently spherical zircon beads ZB. This is thought to be because it cannot be involved.

  Further, as shown in FIG. 2B, the high-pressure water sprayed from the three spray nozzles 4A, 4B, and 4C is sprayed out of the longitudinal direction of the surface of the round bar-shaped workpiece W1. Is set to The reason for this is that if the high-pressure water sprayed from the three spray nozzles 4A, 4B, 4C is sprayed at the same position in the longitudinal direction of the surface of the round bar-shaped workpiece W1, Since they may collide with each other and the momentum may be reduced, as described above, the two legs of the substantially U-shaped support block 3 are bent so that they can be jetted out of alignment with each other in the longitudinal direction. .

  Therefore, if there is no risk that the injected high-pressure water collides with each other, there is no need to bend both legs as in the support block 3 according to the first embodiment. You may make it spray on the same position of the longitudinal direction of the surface of the workpiece W1. Further, the diameters of the three injection nozzles 4A, 4B, and 4C are about 2 mm. It has been found that the scale can be removed more efficiently by setting the spray nozzle diameter in the range of about 0.1 mm to about 6 mm, more preferably in the range of about 1 mm to about 3 mm.

In the scale removing apparatus 1 according to the first embodiment, the support block 3 is made of stainless steel (SUS316). However, the material of the support block 3 is not limited to this, and the bending strength is high and the resistance is high. Other metals such as structural ceramics (silicon nitride (Si ₃ N ₄ ), silicon carbide (SiC), etc.) having high wear properties and aluminum can also be used.

  In addition, in the scale removing device 1 according to the first embodiment, a transparent acrylic resin water tank is used as the device main body 2, but a water tank made of XXX or a water tank made of OO is used. You can also. By using a transparent acrylic resin water tank, the inside of the apparatus main body 2 can be easily observed, and it is possible to check how high-pressure water is sprayed and how spherical zircon beads ZB are involved. Is obtained.

Furthermore, in the scale removing apparatus 1 and the scale removing method according to the first embodiment, spherical zircon beads ZB are used as spherical fine particles close to a true sphere. Spherical zircon (ZrSiO ₄ ) beads ZB are produced by an electrolysis process at 2500 ° C. or higher, and crystalline zirconia particles surrounded by a silica phase have a high strength and smooth surface. The specific gravity is 3.8, the Mohs hardness is 7, the crushing strength is 700 N for beads having a diameter of 2 mm, and since it has a spherical shape close to a true sphere, there is no risk of scratching the round bar-shaped workpiece.

  As shown in the SEM photograph of FIG. 3, the spherical zircon beads (the photograph has a particle diameter of about 40 μm) ZB used in the scale removing apparatus 1 according to the first embodiment are solid and almost spherical. Therefore, it is difficult to wear and crush, and the spray energy can be applied to the round bar-shaped workpiece W1 most efficiently, and the scale removal speed is faster than the conventional scale removal method using an angular abrasive material. The removed marks become smooth.

  And since it is hard to crush, when the scale wrinkles which have been shaved off accumulate and the water becomes dirty, it can be reused any number of times by collecting and removing the scale wrinkles. A specific method for collecting spherical zircon beads will be described. A spherical zircon bead collecting device 40 having a configuration as shown in FIG. 4 is used.

  As shown in FIG. 4, the spherical zircon bead collection device 40 according to the first embodiment includes a combination of a magnetic separator and an oil schema 41, a cyclone separator 42, a chip removal filter 43, a collection liquid tank 44, a crushing liquid The piece removing device 45 and a pipe connecting these are provided.

  Impurities other than spherical zircon beads and water contained in the effluent are mainly round bar-shaped workpieces (scale 滓), oil such as lubricating oil, and iron scraps from which the inner wall of the piping system has been cut. It is. In view of this, first, iron components such as scale iron and iron scraps are removed by magnetic adsorption with the magnet separator 41, and at the same time, oil components are removed with the oil schema 41.

  Next, only the spherical zircon beads are separated by the difference in specific gravity by the cyclone separator 42, and the broken pieces of spherical zircon beads that have been crushed after being repeatedly used for a long time by the crushed piece removing device 45 roll down the slope. The high-pressure water supplied from the high-pressure pumps 5A, 5B, 5C is removed at high speed from the injection nozzles 4A, 4B, 4C. It is sprayed on the round bar-shaped workpiece W1 and reused.

  Further, from the recovered liquid from which the spherical zircon beads are separated together with a part of clean water, the water that has been cleaned by removing chips and the like by the chip removing filter 43 is supplied to the high-pressure pump via the recovered liquid tank 44. Supplied to 5A, 5B, 5C and reused. The capacity of the recovered liquid tank 44 is preferably about 20 times to about 50 times the discharge amount in consideration of the safety of the high pressure pumps 5A, 5B, 5C.

  In this way, in the scale removing apparatus 1 according to the first embodiment, not only spherical zircon beads but also water for high-pressure water can be collected and reused many times, greatly increasing the running cost. In addition to reducing the amount of waste water and industrial waste, the scale removal device and the scale removal method are friendly to the environment.

  In the spherical zircon bead collection device 40 according to the first embodiment, only the spherical zircon beads are separated by the cyclone separator 42. However, instead of the cyclone separator 42, a stepped thickener (precipitation tank) is used to adjust the sedimentation speed. Only fast spherical zircon beads may be separated, or both a stepped thickener and a cyclone separator 42 may be used. In addition, iron components such as scale iron and iron scraps are removed by magnetic adsorption with the magnetic separator 41, and at the same time, the oil components are removed with the oil schema 41, and then the spherical zircon beads with an elementless filter (Elementless Filstar (registered trademark)). And water can be separated.

  As described above, in the scale removing apparatus 1 and the scale removing method according to the first embodiment, by using the spherical zircon beads ZB as spherical fine particles close to the true sphere, the scale removal speed is increased, and the round bar-shaped coated object is obtained. Since the workpiece W1 can be moved quickly, the scale removal step can be shortened remarkably, and a smooth surface can be obtained by preventing the formation of fine irregularities on the scale removed. Furthermore, it is possible to reuse spherical fine particles close to a true sphere and water, thereby reducing the running cost of the system.

Embodiment 2
Next, a scale removing apparatus and a scale removing method according to the second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a perspective view showing the overall configuration of the scale removing apparatus according to the second embodiment of the present invention.

  As shown in FIG. 5, the scale removing device 11 according to the second embodiment uses a transparent acrylic resin water tank as the device main body 12, and penetrates to the opposite side of the device main body 12 at the same height. A hole is formed, a rubber ring for sealing is attached, and a workpiece inlet 12A and a workpiece outlet 12B are provided. As shown in FIG. 5, a soft steel bar (SWRM) W2 having an outer diameter of about 11 mm as a round bar-shaped workpiece is moved in the direction of the arrow at a predetermined speed, and enters the apparatus main body 12 from the workpiece inlet 12A. Enter and exit from the workpiece outlet 12B. A soft steel bar W2 having an outer diameter of about 11 mm as a round bar-shaped workpiece is in a coiled state before the scale removal process, and is wound again with a large force after the scale removal process.

  In this way, in the scale removing device 11 according to the second embodiment, four spray nozzles 14A, 14B, 14C, and 14D are installed for the round bar-shaped workpiece W2 that moves at a predetermined speed. Has been. The injection nozzle 14A is fixed to the left side surface of the apparatus main body 12 in a horizontal direction, and is provided at substantially the same height as the round bar-shaped workpiece W2. The injection nozzle 14B is mounted on the bottom surface of the apparatus main body 12. It is fixed facing upward and is provided directly below the round bar-shaped workpiece W2.

  The injection nozzle 14 </ b> C is fixed to the right side surface of the apparatus main body 12 in the horizontal direction, and is provided at substantially the same height as the round bar-shaped workpiece W <b> 2. The injection nozzle 14 </ b> D is the upper surface of the apparatus main body 12. And is fixed to a support mechanism (not shown) and is provided directly above the workpiece W2 having a round bar shape. That is, the four injection nozzles 14A, 14B, 14C, and 14D are installed so as to surround the round bar-shaped workpiece W2 from four sides at an angle of about 90 degrees.

  The four injection nozzles 14A, 14B, 14C, and 14D are connected to high-pressure pumps 15A, 15B, 15C, and 15D that supply high-pressure water via high-pressure pipes 16A, 16B, 16C, and 16D, respectively. A water tank unit (not shown) is connected to these high pressure pumps 15A, 15B, 15C and 15D in order to supply water to the high pressure pumps 15A, 15B, 15C and 15D.

  As in the first embodiment, the apparatus main body 12 is filled with water BL as a liquid mixed with spherical zircon beads as spherical fine particles close to a true sphere, and the four injection nozzles 14A, 14B, 14C, and 14D are supported and fixed so that at least their tips are immersed in water BL.

  When high-pressure water is jetted from the four jet nozzles 14A, 14B, 14C, and 14D, almost spherical spherical zircon beads as shown in the SEM photograph of FIG. Is sprayed onto the surface of the round bar-shaped workpiece W2 at a high speed about 3 times (Mach 3), whereby the scale of the surface of the round bar-shaped workpiece W2 is scraped off and removed.

  Here, the distance between the tips of the four injection nozzles 14A, 14B, 14C, and 14D and the surface of the round bar-shaped workpiece W2 is set to 40 mm to 50 mm as in the first embodiment. It has been found that scale removal can be performed more efficiently by setting this distance in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm. The reason for this is that if this distance is too large, the momentum of the high-pressure water sprayed on the surface of the round bar-shaped workpiece W2 will be weak, and conversely, if this distance is too small, the high-pressure water will sufficiently squeeze the spherical zircon beads. This is thought to be because it cannot be involved.

  Furthermore, as shown in FIG. 5, the high-pressure water sprayed from the four spray nozzles 14A, 14B, 14C, and 14D is sprayed out of the longitudinal direction of the surface of the round bar-shaped workpiece W2. Is set to This is because the high pressure water sprayed from the four spray nozzles 14A, 14B, 14C, 14D is sprayed at the same position in the longitudinal direction of the surface of the round bar-shaped workpiece W2, and is sprayed. Since the water may collide with each other and the momentum may be diminished, the four injection nozzles 14A, 14B, 14C, and 14D are displaced from each other in the longitudinal direction by shifting the installation positions of the four injection nozzles 14A, 14B, 14C, and 14D. .

  Therefore, if there is no risk of the momentum being reduced even if the high-pressure water that is injected collides with each other, the installation positions of the four injection nozzles 14A, 14B, 14C, and 14D are shifted as in the second embodiment. There is no need, and high pressure water from two to four spray nozzles may be sprayed at the same position in the longitudinal direction of the surface of the round bar-shaped workpiece W2. The four injection nozzles 14A, 14B, 14C, and 14D have an injection port diameter of about 2 mm. It has been found that the scale can be removed more efficiently by setting the spray nozzle diameter in the range of about 0.1 mm to about 6 mm, more preferably in the range of about 1 mm to about 3 mm.

  Further, in the scale removing apparatus 11 according to the second embodiment, a transparent acrylic resin water tank is used as the apparatus main body 12, but an opaque stainless steel water tank or the like can also be used. By using a transparent acrylic resin water tank, the inside of the apparatus main body 12 can be easily observed, and it is possible to check how high-pressure water is sprayed and how spherical zircon beads ZB are involved. Is obtained.

  Further, in the scale removing device 11 according to the second embodiment, as in the first embodiment, every time the scale wrinkles are collected using the spherical zircon bead collecting device 40 as shown in FIG. It is preferable to extract spherical zircon bead-mixed water BL from 12 to remove impurities such as scale soot and collect spherical zircon beads ZB.

  Thus, in the scale removing device 11 and the scale removing method according to the second embodiment, spherical zircon beads as spherical fine particles close to true spheres are mixed in the water as the abrasive as the abrasive, and 4 The round bar-shaped workpiece W2 is scratched by installing and fixing the jet nozzles 14A, 14B, 14C, 14D so as to jet high-pressure water over the entire outer peripheral surface of the round bar-shaped workpiece W2. In addition, the scale removal efficiency is high, and the scale can be removed uniformly at a significantly low cost.

Embodiment 3
Next, a scale removing apparatus and a scale removing method according to the third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a longitudinal sectional view showing the configuration of the main part of the scale removing apparatus according to the third embodiment of the present invention.

  As shown in FIG. 6, the scale removing apparatus according to the third embodiment uses only one injection nozzle 21 that injects high-pressure water as a high-pressure liquid. Instead, a semicylindrical bowl-shaped cover 23 is fixed by a support member (not shown) along the longitudinal direction around a round bar-shaped workpiece W3 onto which high-pressure water is sprayed from the jet nozzle 21 to the surface. .

  As a result, spherical zircon beads ZB as spherical fine particles close to a true sphere are mixed in water filled in the apparatus main body (not shown), and high-pressure water supplied from a high-pressure pump (not shown) via the high-pressure pipe 22 is injected. When sprayed onto the surface of the round bar-shaped workpiece W3 from the nozzle 21, as shown in FIG. 6, the spherical zircon beads ZB are entrained in the high-pressure water, and the surface of the round bar-shaped workpiece W3. The high-pressure water and spherical zircon beads ZB reflected by or passed through the round bar-shaped workpiece W3 are caught by the bowl-shaped cover 23 and sprayed on the back side of the round bar-shaped workpiece W3.

  Thus, in the scale removing apparatus and the scale removing method according to the third embodiment, the scale around the entire surface of the round bar-shaped workpiece W3 is removed by using only one injection nozzle 21. Can do. As a result, the scale can be removed with a single set of expensive high-pressure pump, high-pressure pipe 22 and injection nozzle 21, and the scale can be removed evenly at a lower cost.

  In addition, in the scale removing apparatus according to the third embodiment, as in the first embodiment, each time the scale wrinkles are collected using the spherical zircon bead collecting apparatus 40 as shown in FIG. It is preferable to extract the spherical zircon bead mixed water BL to remove impurities such as scale soot and recover the spherical zircon beads ZB.

Embodiment 4
Next, a scale removing apparatus and a scale removing method according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 7A is a perspective view showing the configuration of the main part of the scale removing apparatus according to Embodiment 4 of the present invention, and FIG. 7B is a longitudinal sectional view.

  As shown in FIG. 7A, in the scale removing apparatus according to the fourth embodiment, as in the third embodiment, only one injection nozzle 26 that injects high-pressure water as a high-pressure liquid is used. Not done. Instead, a cylindrical cylindrical cover 28 is fixed by a support member (not shown) along the longitudinal direction around the round bar-shaped workpiece W4 onto which high-pressure water is sprayed from the spray nozzle 26. Then, as shown in FIG. 7B, the tip of the injection nozzle 26 is fitted and fixed in a through hole formed in the upper center of the cylindrical cover 28.

  Thereby, spherical zircon beads ZB as spherical fine particles close to a true sphere are mixed in water filled in the apparatus body (not shown), and high-pressure water supplied from a high-pressure pump (not shown) via the high-pressure pipe 27 is injected. When sprayed from the nozzle 26 onto the surface of the round bar-shaped workpiece W4, as shown in FIG. 7B, the spherical zircon beads ZB are also sprinkled into the high-pressure water, and the round bar-shaped workpiece The high-pressure water and spherical zircon beads ZB reflected on the surface of W4 or passed through the round bar-shaped workpiece W4 are rolled up by the cylindrical cover 28 and sprayed around the entire circumference of the round bar-shaped workpiece W4.

  As described above, in the scale removing device and the scale removing method according to the fourth embodiment, the scale around the entire surface of the round bar-shaped workpiece W4 is removed by using only one injection nozzle 26. Can do. As a result, the scale can be removed with a single set of expensive high-pressure pump, high-pressure pipe 27, and injection nozzle 26, and the scale can be removed evenly at a lower cost.

  In addition, in the scale removing apparatus according to the fourth embodiment, as in the first embodiment, every time the scale wrinkles are collected using the spherical zircon bead collecting apparatus 40 as shown in FIG. It is preferable to extract the spherical zircon bead mixed water BL to remove impurities such as scale soot and recover the spherical zircon beads ZB.

Embodiment 5
Next, a scale removing apparatus and a scale removing method according to Embodiment 5 of the present invention will be described with reference to FIGS.

  FIG. 8 is a perspective view showing the overall configuration of the scale removing apparatus according to Embodiment 5 of the present invention. FIG. 9A is a front view showing the structure of the support block of the scale removing device according to the fifth embodiment of the present invention, and FIG. 9B is a bottom view.

  As shown in FIG. 8, the scale removing device 31 according to the fifth embodiment uses a transparent acrylic resin water tank as the device main body 32, and has through holes at the same height on opposite sides in the short direction. A rubber ring for sealing is attached, and a workpiece inlet 32A and a workpiece outlet 32B are provided.

  As shown in FIG. 8, a soft steel bar (SWRM) W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece moves in the direction of the arrow at a predetermined speed, and enters the apparatus main body 32 from the workpiece inlet 32A. Enter and exit from the workpiece outlet 32B. A soft steel bar W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece is in a coiled state before the scale removal process, and is wound again with a large force after the scale removal process.

  A substantially U-shaped support block 33 is fixed by a support mechanism (not shown) so as to surround the round bar-shaped workpiece W1 that moves at a predetermined speed in this manner. The injection nozzles 34A and 34B are attached and fixed. The two injection nozzles 34A and 34B are connected to high-pressure pumps 35A and 35B that supply high-pressure water via high-pressure pipes 36A and 36B, respectively.

  A water tank unit (not shown) is connected to these high pressure pumps 35A and 35B in order to supply water to the high pressure pumps 35A and 35B. The apparatus main body 32 is filled with water BL as a liquid mixed with spherical zircon beads as spherical fine particles close to a true sphere, and the support block 33 is so immersed that at least both legs are immersed in the water BL. The support is fixed.

  Further, as shown in FIG. 8 with a part of the apparatus main body 32 cut away, the substantially U-shaped support block 3 has a leg portion to which the injection nozzle 34A is attached bent toward the workpiece inlet 32A. The leg portion to which the injection nozzle 34B is attached is bent toward the workpiece outlet 32B. As a result, the position where the high-pressure water as the high-pressure liquid ejected from the two ejection nozzles 34A and 34B is sprayed on the surface of the round bar-shaped workpiece W1 is shifted from the longitudinal direction of the workpiece W1. It has become.

  The support block 33 and the two injection nozzles 34A and 34B will be described in more detail with reference to FIG.

  As shown in FIG. 9 (a), the support block 33 is substantially U-shaped when viewed from the front, and the injection nozzle 34A is fixed to the right leg portion so as to face the horizontal direction. The spray nozzle 34B is fixed in the horizontal direction. As shown in FIG. 9 (a), the injection directions of these two injection nozzles 34A and 34B are at an angle of about 180 degrees to each other. It is set so that high-pressure water can be sprayed on.

  Further, as shown in FIG. 9A, the water filled in the apparatus main body 32 is mixed with spherical zircon beads ZB as spherical fine particles close to a true sphere. When high-pressure water is jetted from 34A and 34B, spherical zircon beads ZB are entrained in the flow, and sprayed together with the high-pressure water on the surface of the round bar-shaped workpiece W1 at a speed about three times the speed of sound (Mach 3). As a result, the scale on the surface of the round bar-shaped workpiece W1 is scraped off and removed.

  Here, the distance between the tips of the two injection nozzles 34A and 34B and the surface of the round bar-shaped workpiece W1 is 40 mm to 50 mm. It has been found that scale removal can be performed more efficiently by setting this distance in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm. The reason for this is that if this distance is too large, the momentum of the high-pressure water sprayed on the surface of the round bar-shaped workpiece W1 will be weak, and conversely if this distance is too small, the high-pressure water will be sufficiently spherical zircon beads ZB. This is thought to be because it cannot be involved.

  Further, as shown in FIG. 9B, the high-pressure water sprayed from the two spray nozzles 34A, 34B is sprayed out of the longitudinal direction of the surface of the round bar-shaped workpiece W1. Is set. The reason for this is that if the high pressure water sprayed from the two spray nozzles 34A, 34B is sprayed to the same position in the longitudinal direction of the surface of the round bar-shaped workpiece W1, the sprayed high pressure water collides with each other. Since the momentum may be diminished, the legs of the substantially U-shaped support block 33 are bent as described above so that they are sprayed out of the longitudinal direction.

  Therefore, if there is no risk that the injected high-pressure water collides with each other, there is no need to bend both legs as in the support block 33 according to the fifth embodiment. You may make it spray on the same position of the longitudinal direction of the surface of the workpiece W1. Further, the diameters of the two injection nozzles 34A and 34B are about 2 mm. It has been found that the scale can be removed more efficiently by setting the spray nozzle diameter in the range of about 0.1 mm to about 6 mm, more preferably in the range of about 1 mm to about 3 mm.

In the scale removing device 31 according to the fifth embodiment, the support block 33 is made of stainless steel (SUS316). However, the material of the support block 33 is not limited to this, and the bending strength is high and the resistance is high. Other metals such as structural ceramics (silicon nitride (Si ₃ N ₄ ), silicon carbide (SiC), etc.) having high wear properties and aluminum can also be used.

  Further, in the scale removing apparatus 31 according to the fifth embodiment, a transparent acrylic resin water tank is used as the apparatus main body 32, but an opaque stainless steel water tank or the like can also be used. By using a transparent acrylic resin water tank, the inside of the apparatus main body 32 can be easily observed, and it is possible to check how high-pressure water is sprayed and how spherical zircon beads ZB are involved. Is obtained.

  Further, in the scale removing device 31 according to the fifth embodiment, as in the first embodiment, every time the scale wrinkles are collected using the spherical zircon bead collecting device 40 as shown in FIG. It is preferable to extract spherical zircon bead-containing water BL from 32 to remove impurities such as scale soot and collect spherical zircon beads ZB.

  In this way, in the scale removing device 31 and the scale removing method according to the fifth embodiment, only the two injection nozzles 34A and 34B are used, and the scale of the entire surface of the round bar-shaped workpiece W1 is obtained. Can be removed. As a result, the expensive high-pressure pumps 35A and 35B, the high-pressure pipes 36A and 36B, and the injection nozzles 34A and 34B can remove the scale with only two types, and the scale can be removed evenly at a lower cost.

Embodiment 6
Next, a scale removing apparatus and a scale removing method according to a sixth embodiment of the present invention will be described with reference to FIGS. Unlike the first to fifth embodiments, the scale removing apparatus and the scale removing method according to the sixth embodiment are spherical zircon as spherical fine particles close to a true sphere having a hardness higher than that of a round bar-shaped workpiece. This is a system in which high-pressure water mixed with beads is sprayed from a spray nozzle, and corresponds to the inventions of claims 4 and 9.

  FIG. 10 is a perspective view showing an overall configuration of a scale removing apparatus according to Embodiment 6 of the present invention. FIG. 11: is a longitudinal cross-sectional view which shows the structure of the injection nozzle used for the scale removal apparatus and scale removal method concerning Embodiment 6 of this invention. FIG. 12 is a block diagram showing a configuration of a spherical zircon bead collecting device used in the scale removing device and the scale removing method according to the sixth embodiment of the present invention. FIG. 13A is a front view showing the structure of the support block of the scale removing device according to Embodiment 6 of the present invention, and FIG. 13B is a bottom view.

  As shown in FIG. 10, the scale removing device 51 according to the sixth embodiment uses a transparent acrylic resin water tank as the device main body 2 as in the first embodiment, and is opposed in the short direction. A through hole is drilled at the same height on the side surface, and a rubber ring for sealing is attached to provide a workpiece inlet 2A and a workpiece outlet 2B. As shown in FIG. 10, a mild steel bar (SWRM) W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece is moved in the direction of the arrow at a predetermined speed faster than that in the first embodiment. It enters the apparatus main body 2 from the inlet 2A and exits from the workpiece outlet 2B. A soft steel bar W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece is in a coiled state before the scale removal process, and is wound again with a large force after the scale removal process.

  A substantially U-shaped support block 3 is fixed by a support mechanism (not shown) so as to surround the round bar-shaped workpiece W1 that moves at a predetermined speed in this manner. The injection nozzles 54A, 54B, 54C are attached and fixed. The three injection nozzles 54A, 54B, and 54C are connected to high-pressure pumps 5A, 5B, and 5C that supply high-pressure water through high-pressure pipes 6A, 6B, and 6C, respectively. A water supply tank unit 5D is connected to these high pressure pumps 5A, 5B, 5C in order to supply water to the high pressure pumps 5A, 5B, 5C.

  Further, the scale removing device 51 according to the sixth embodiment is different from the scale removing device 1 according to the first embodiment in that a spherical zircon bead supply device 55 as a spherical fine particle supply device is installed in the vicinity of the device main body 2. The spherical zircon beads are supplied to the injection nozzles 54A, 54B, and 54C from the spherical zircon bead supply device 55 through the pipes 56A, 56B, and 56C, and the high-pressure pipes 6A and 6B are supplied to the injection nozzles 54A, 54B, and 54C, respectively. , 6C is mixed into the high-pressure water supplied through 6C.

 Spherical zircon beads have a specific gravity of 3.8, a Mohs hardness of 7 and a crushing strength of 700 N for beads with a diameter of 2 mm, and they can be crushed without fear of scratching the mild steel bar W1 as a round, round bar-shaped workpiece. It is difficult to do so and can be reused any number of times. That is, as shown in FIG. 10, the used spherical zircon bead mixed water collected at the bottom of the apparatus body 2 is discharged from the discharge pipe 2C and enters the spherical zircon bead recovery device 57 as a spherical fine particle recovery device. Only clean spherical zircon beads and clean water are collected and supplied directly from the pipes 58A, 58B, 58C to the injection nozzles 54A, 54B, 54C, respectively. Further, only clean water is separately collected and supplied to the water supply tank unit 5D from the pipe 58D and reused.

 The apparatus main body 2 is filled with water WL as the same liquid as the high-pressure water as the high-pressure liquid mixed with the spherical zircon beads, and the support block 3 is supported and fixed so that the whole is immersed in the water WL. ing. Furthermore, as shown in FIG. 10 with a part of the apparatus main body 2 cut away, the substantially U-shaped support block 3 has a leg portion to which the injection nozzle 54B is attached bent toward the workpiece inlet 2A. The leg portion to which the injection nozzle 54C is attached is bent toward the workpiece outlet 2B. As a result, the high-pressure water as the high-pressure liquid ejected from the three ejection nozzles 54A, 54B, and 54C is sprayed on the surface of the round bar-shaped workpiece W1 in the longitudinal direction of the workpiece W1. It is designed to shift.

 Next, the structure of the three injection nozzles 54A, 54B, and 54C will be described with reference to FIG. Although the internal structure of the injection nozzle 54A is shown in FIG. 11, the internal structures of the other two injection nozzles 54B and 54C are exactly the same. As shown in FIG. 11, in the main body 54a of the injection nozzle 54A, a high-pressure pipe 6A that supplies high-pressure water, a pipe 56A that supplies spherical zircon beads ZB, and the collected clean spherical zircon beads and clean water. A supply pipe 58A is connected. Then, as shown in FIG. 11, spherical zircon beads ZB are mixed in the high-pressure water jetted from the high-pressure pipe 6A in the jet nozzle main body 54a, and from the tip of the jet nozzle 54A to the surface of the round bar-shaped workpiece W1. Be sprayed.

  Next, a specific configuration of the spherical zircon bead collection device 57 will be described with reference to FIG. As shown in FIG. 12, the spherical zircon bead collection device 57 according to the sixth embodiment is a combination of a magnetic separator and an oil schema 41, a cyclone separator 42, a chip removal filter 43, a collection liquid tank 44, a crushing liquid A piece removing device 45 and a pipe connecting them are provided, and the configuration is the same as that of the spherical zircon bead collecting device 40 of the first embodiment.

  As impurities other than the spherical zircon beads and water contained in the discharged liquid discharged from the discharge pipe 2C, round bar-shaped workpiece material (scale soot), oil such as lubricating oil, and the inner wall of the piping system were shaved. Iron scraps are the main ones. In view of this, first, iron components such as scale iron and iron scraps are removed by magnetic adsorption with the magnet separator 41, and at the same time, oil components are removed with the oil schema 41.

  Next, only the spherical zircon beads are separated by the difference in specific gravity by the cyclone separator 42, and the broken pieces of spherical zircon beads that have been crushed after being repeatedly used for a long time by the crushed piece removing device 45 roll down the slope. The high-pressure water supplied from the high-pressure pumps 5A, 5B and 5C is removed from the fast spherical zircon beads and supplied to the injection nozzles 54A, 54B and 54C together with the cleaned water. From 54C, it is sprayed at a high speed onto a round bar-shaped workpiece W1 and reused.

  Further, from the recovered liquid from which the spherical zircon beads are separated together with a part of clean water, the water that has been cleaned by removing chips and the like by the chip removing filter 43 is supplied from the recovered liquid tank 44 to the water supply tank unit 5D. Are supplied to the high-pressure pumps 5A, 5B, and 5C and reused. The capacity of the recovered liquid tank 44 is preferably about 20 times to about 50 times the discharge amount in consideration of the safety of the high pressure pumps 5A, 5B, 5C.

  As described above, in the scale removing device 51 of the sixth embodiment, not only spherical zircon beads but also water for high-pressure water can be collected and reused many times, greatly increasing the running cost. In addition to reducing the amount of waste water and industrial waste, the scale removal device and the scale removal method are friendly to the environment.

  In the spherical zircon bead collection device 57 according to the sixth embodiment, only the spherical zircon beads are separated by the cyclone separator 42. However, a stepped thickener (sedimentation tank) is used instead of the cyclone separator 42 to set the sedimentation speed. Only fast spherical zircon beads may be separated, or both a stepped thickener and a cyclone separator 42 may be used. In addition, iron components such as scale iron and iron scraps are removed by magnetic adsorption with the magnetic separator 41, and at the same time, the oil components are removed with the oil schema 41, and then the spherical zircon beads with an elementless filter (Elementless Filstar (registered trademark)). And water can be separated.

  Next, the support block 3 and the three injection nozzles 54A, 54B, 54C will be described in more detail with reference to FIG. As shown in FIG. 13 (a), the support block 3 is substantially U-shaped when viewed from the front, and an injection nozzle 54A is fixed at the center of the upper part facing downwards, and the right leg is obliquely upward. The injection nozzle 54B faces and is fixed, and the injection nozzle 54C is fixed to the left leg portion also facing obliquely upward.

 As shown in FIG. 13 (a), the injection directions of the three injection nozzles 54A, 54B, and 54C are angled to each other by about 120 degrees, whereby the entire circumference of the round bar-shaped workpiece W1 is formed. The high pressure water in which the spherical zircon beads ZB are mixed is surely sprayed. When high-pressure water in which spherical zircon beads ZB are mixed is injected from the three injection nozzles 54A, 54B, 54C, the spherical zircon beads ZB together with the high-pressure water have a round bar-like covering at a speed about three times the speed of sound (Mach 3). It is sprayed on the surface of the workpiece W1, whereby the scale on the surface of the round bar-like workpiece W1 is scraped off and removed more powerfully and reliably.

  Here, the distance d between the tips of the three injection nozzles 54A, 54B, 54C and the surface of the round bar-shaped workpiece W1 is 40 mm to 50 mm. It has been found that scale removal can be performed more efficiently by setting the distance d in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm. The reason for this is that if the distance d is too large, the momentum of the high-pressure water sprayed on the surface of the round bar-shaped workpiece W1 is weakened. Conversely, if the distance d is too small, the high-pressure water mixed with the spherical zircon beads ZB is mixed. This is thought to be due to not spreading sufficiently.

  Furthermore, as shown in FIG. 13B, the high-pressure water sprayed from the three spray nozzles 54A, 54B, 54C is sprayed out of alignment with each other in the longitudinal direction of the surface of the round bar-shaped workpiece W1. Is set to This is because if the high pressure water sprayed from the three spray nozzles 54A, 54B, 54C is sprayed at the same position in the longitudinal direction of the surface of the round bar-shaped workpiece W1, Since they may collide with each other and the momentum may be reduced, as described above, the two legs of the substantially U-shaped support block 3 are bent so that they can be jetted out of alignment with each other in the longitudinal direction. .

  Therefore, when there is no risk of the momentum being diminished even if the high-pressure water that is jetted collides with each other, it is not necessary to bend both legs as in the support block 3 according to the sixth embodiment, You may make it spray on the same position of the longitudinal direction of the surface of the workpiece W1. The jet nozzle diameters of the three jet nozzles 54A, 54B, 54C are about 2 mm. It has been found that the scale can be removed more efficiently by setting the spray nozzle diameter in the range of about 0.1 mm to about 6 mm, more preferably in the range of about 1 mm to about 3 mm.

In the scale removing device 51 according to the sixth embodiment, the support block 3 is made of stainless steel (SUS316). However, the material of the support block 3 is not limited to this, and the bending strength is high and the resistance is high. Other metals such as structural ceramics (silicon nitride (Si ₃ N ₄ ), silicon carbide (SiC), etc.) having high wear properties and aluminum can also be used.

  Further, in the scale removing apparatus 51 according to the sixth embodiment, a transparent acrylic resin water tank is used as the apparatus main body 2, but an opaque stainless steel water tank or the like can also be used. By using a transparent acrylic resin water tank, the inside of the apparatus main body 2 can be easily observed, and it is possible to check how high-pressure water is sprayed and how spherical zircon beads ZB are involved. Is obtained.

Furthermore, in the scale removing device 51 and the scale removing method according to the sixth embodiment, spherical zircon beads ZB are used as spherical fine particles close to a true sphere. Spherical zircon (ZrSiO ₄ ) beads ZB are produced by an electrolysis process at 2500 ° C. or higher, and crystalline zirconia particles surrounded by a silica phase have a high strength and smooth surface. The specific gravity is 3.8, the Mohs hardness is 7, the crushing strength is 700 N for beads having a diameter of 2 mm, and since it has a spherical shape close to a true sphere, there is no risk of scratching the round bar-shaped workpiece.

  Thus, in the scale removing device 51 and the scale removing method according to the sixth embodiment, the spherical zircon beads ZB are used as spherical fine particles close to the true sphere, and the high-pressure water mixed with the spherical zircon beads ZB is 3 By spraying from the individual spray nozzles 54A, 54B, 54C, the scale removal speed can be further increased and the round bar-shaped workpiece W1 can be moved even faster, so the scale removal process can be significantly shortened. At the same time, it is possible to prevent a fine unevenness from being generated on the trace from which the scale has been removed and to make the surface smooth. Furthermore, it is possible to reuse spherical fine particles close to a true sphere and water, thereby reducing the running cost of the system.

Embodiment 7
Next, a scale removing apparatus and a scale removing method according to Embodiment 7 of the present invention will be described with reference to FIG. FIG. 14: is a perspective view which shows the whole structure of the scale removal apparatus concerning Embodiment 7 of this invention. In the scale removing apparatus and scale removing method according to the seventh embodiment, spherical zircon beads as spherical fine particles close to a true sphere having a hardness higher than that of a round bar-like workpiece are mixed, as in the sixth embodiment. This is a system in which high-pressure water is sprayed from the spray nozzle, and corresponds to the inventions of claims 4 and 9.

  As shown in FIG. 14, the scale removing apparatus 61 according to the seventh embodiment uses a transparent acrylic resin water tank as the apparatus main body 12 as in the second embodiment. A through hole is formed at the same height on the opposite side surface, a rubber ring for sealing is attached, and a workpiece inlet 12A and a workpiece outlet 12B are provided. As shown in FIG. 14, a soft steel bar (SWRM) W2 having an outer diameter of about 11 mm as a round bar-shaped workpiece moves in the direction of the arrow at a predetermined speed faster than that in the second embodiment, The workpiece enters the apparatus main body 12 from the workpiece inlet 12A and exits from the workpiece outlet 12B. A soft steel bar W2 having an outer diameter of about 11 mm as a round bar-shaped workpiece is in a coiled state before the scale removal process, and is wound again with a large force after the scale removal process.

  In this way, in the scale removing device 61 according to the seventh embodiment, the four injection nozzles 64A, 64B, 64C, and 64D are installed on the round bar-shaped workpiece W2 that moves at a predetermined speed. Has been. The injection nozzle 64A is fixed to the left side surface of the apparatus main body 12 in the horizontal direction, and is provided at substantially the same height as the round bar-shaped workpiece W2. The injection nozzle 64B is mounted on the bottom surface of the apparatus main body 12. It is fixed facing upward and is provided directly below the round bar-shaped workpiece W2.

  The injection nozzle 64C is fixed to the right side surface of the apparatus main body 12 in the horizontal direction, and is provided at substantially the same height as the round bar-shaped workpiece W2. The injection nozzle 64D is the upper surface of the apparatus main body 12. And is fixed to a support mechanism (not shown) and is provided directly above the workpiece W2 having a round bar shape. That is, the four injection nozzles 64A, 64B, 64C, and 64D are installed so as to surround the round bar-shaped workpiece W2 from four sides at an angle of about 90 degrees. The structure of these four injection nozzles 64A, 64B, 64C, 64D is the same as the structure of the injection nozzles 54A, 54B, 54C in the sixth embodiment shown in FIG.

  That is, the four injection nozzles 64A, 64B, 64C, and 64D are connected to high-pressure pumps 15A, 15B, 15C, and 15D that supply high-pressure water through high-pressure pipes 16A, 16B, 16C, and 16D, respectively. A water supply tank unit 15E is connected to these high pressure pumps 15A, 15B, 15C, 15D in order to supply water to the high pressure pumps 15A, 15B, 15C, 15D. In addition, a spherical zircon bead supply device 65 as a spherical fine particle supply device is installed in the vicinity of the apparatus main body 12, and the spherical zircon beads pass from the spherical zircon bead supply device 65 through the pipes 66A, 66B, 66C, 66D. These are supplied to the injection nozzles 64A, 64B, 64C and 66D, respectively, and mixed into the high-pressure water supplied through the high-pressure pipes 16A, 16B, 16C and 16D in the injection nozzles 64A, 64B, 64C and 66D.

 Spherical zircon beads have a specific gravity of 3.8, a Mohs hardness of 7, and a crushing strength of 700 mm for beads with a diameter of 2 mm, and they can be crushed without fear of scratching the mild steel rod W2 as a round and round bar-shaped workpiece. It is difficult to do so and can be reused any number of times. That is, as shown in FIG. 14, the used spherical zircon bead-mixed water collected at the bottom of the apparatus main body 12 is discharged from the discharge pipe 12C and enters the spherical zircon bead collection device 67 as a spherical fine particle collection device. Only clean spherical zircon beads and clean water are recovered and supplied directly from the pipes 68A, 68B, 68C, 68D to the injection nozzles 64A, 64B, 64C, 64D, respectively. Further, only clean water is separately collected and supplied to the water supply tank unit 15E for reuse.

 The apparatus main body 12 is filled with water WL as the same liquid as the high-pressure water as the high-pressure liquid mixed with the spherical zircon beads, and the four injection nozzles 64A, 64B, 64C, 64D have at least the same The tip is supported and fixed so as to be immersed in the water WL. When high-pressure water mixed with substantially spherical spherical zircon beads as shown in the SEM photograph of FIG. 3 is injected from the four injection nozzles 64A, 64B, 64C, and 64D, it is about three times the speed of sound ( Mach 3) is sprayed on the surface of the round bar-shaped workpiece W2 at a high speed, whereby the scale on the surface of the round bar-shaped workpiece W2 is scraped and removed more powerfully and at a high speed.

  Here, the distance between the tips of the four injection nozzles 64A, 64B, 64C, and 64D and the surface of the round bar-shaped workpiece W2 is set to 40 mm to 50 mm as in the sixth embodiment. It has been found that scale removal can be performed more efficiently by setting this distance in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm. The reason for this is that if this distance is too large, the momentum of the high-pressure water sprayed on the surface of the round bar-shaped workpiece W2 will be weakened. Conversely, if this distance is too small, almost spherical spherical zircon beads will be mixed. This is probably because the high-pressure water does not spread sufficiently.

  Furthermore, as shown in FIG. 14, the high-pressure water sprayed from the four spray nozzles 64A, 64B, 64C, and 64D is sprayed out of the longitudinal direction of the surface of the round bar-shaped workpiece W2. Is set to This is because the high pressure water sprayed from the four spray nozzles 64A, 64B, 64C, and 64D is sprayed at the same position in the longitudinal direction of the surface of the round bar-shaped workpiece W2. Since water may collide with each other and the momentum may be diminished, the installation positions of the four injection nozzles 64A, 64B, 64C, and 64D are shifted from each other in the longitudinal direction and sprayed. . The four injection nozzles 64A, 64B, 64C, 64D have an injection port diameter of about 2 mm. It has been found that the scale can be removed more efficiently by setting the spray nozzle diameter in the range of about 0.1 mm to about 6 mm, more preferably in the range of about 1 mm to about 3 mm.

  Further, in the scale removing apparatus 61 according to the seventh embodiment, a transparent acrylic resin water tank is used as the apparatus main body 12, but an opaque stainless steel water tank or the like can also be used. By using a water tank made of transparent acrylic resin, the inside of the apparatus main body 12 can be easily observed, and the high pressure water mixed with the spherical zircon beads ZB can be checked. It is done.

  In addition, in the scale removing device 61 according to the seventh embodiment, as in the sixth embodiment, every time the scale wrinkles are collected using the spherical zircon bead collecting device 67 shown in FIG. The spherical zircon beads mixed water is extracted to remove impurities such as scale soot and to collect the spherical zircon beads ZB, which contributes to a reduction in running costs and a reduction in industrial waste.

  Thus, in the scale removing device 61 and the scale removing method according to the seventh embodiment, spherical zircon beads as spherical fine particles close to true spheres are mixed in high-pressure water as a high-pressure liquid as an abrasive, The four nozzles 64A, 64B, 64C, and 64D are installed and fixed so as to spray high-pressure water over the entire outer peripheral surface of the round bar-shaped workpiece W2, thereby scratching the round bar-shaped workpiece W2. In addition, the scale removal efficiency is high, and the scale can be removed uniformly at a significantly low cost.

Embodiment 8
Next, a scale removing apparatus and a scale removing method according to Embodiment 8 of the present invention will be described with reference to FIG. FIG. 15 is a perspective view showing the entire configuration of the scale removing apparatus according to Embodiment 8 of the present invention. In the scale removing apparatus and scale removing method according to the eighth embodiment, spherical zircon beads as spherical fine particles close to a true sphere having a hardness higher than that of a round bar-like workpiece are obtained as in the sixth and seventh embodiments. This is a system in which the mixed high-pressure water is sprayed from the spray nozzle, and corresponds to the inventions of claims 3 and 9.

  As shown in FIG. 15, the scale removing device 71 according to the eighth embodiment uses a transparent acrylic resin water tank as the device main body 32 as in the fifth embodiment. A through hole is formed at the same height on the opposite side surface, a rubber ring for sealing is attached, and a workpiece inlet 32A and a workpiece outlet 32B are provided. As shown in FIG. 15, a soft steel bar (SWRM) W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece is moved in the direction of the arrow at a predetermined speed higher than that in the fifth embodiment, The material enters the apparatus main body 32 from the workpiece inlet 32A and exits from the workpiece outlet 32B. A soft steel bar W1 having an outer diameter of about 6 mm as a round bar-shaped workpiece is in a coiled state before the scale removal process, and is wound again with a large force after the scale removal process.

  A substantially U-shaped support block 33 is fixed by a support mechanism (not shown) so as to surround the round bar-shaped workpiece W1 that moves at a predetermined speed in this manner. The injection nozzles 74A and 74B are attached and fixed. The structure of these two injection nozzles 74A, 74B is the same as the structure of the injection nozzles 54A, 54B, 54C in the sixth embodiment shown in FIG.

  That is, the two injection nozzles 74A and 74B are connected to high-pressure pumps 35A and 35B that supply high-pressure water via high-pressure pipes 36A and 36B, respectively. A water supply tank unit 35C is connected to these high pressure pumps 35A and 35B in order to supply water to the high pressure pumps 35A and 35B. Further, a spherical zircon bead supply device 75 as a spherical fine particle supply device is installed in the vicinity of the device main body 32, and the spherical zircon beads are respectively injected from the spherical zircon bead supply device 75 through the pipes 76A and 76B to the injection nozzle 74A. , 74B and mixed into the high pressure water supplied through the high pressure pipes 36A, 36B at the injection nozzles 74A, 74B.

 Spherical zircon beads have a specific gravity of 3.8, a Mohs hardness of 7 and a crushing strength of 700 N for beads with a diameter of 2 mm, and they can be crushed without fear of scratching the mild steel bar W1 as a round, round bar-shaped workpiece. It is difficult to do so and can be reused any number of times. That is, as shown in FIG. 15, the used spherical zircon bead-mixed water collected at the bottom of the apparatus main body 32 is discharged from the discharge pipe 32C and enters the spherical zircon bead recovery device 77 as a spherical fine particle recovery device. Only clean spherical zircon beads and clean water are collected and supplied directly from the pipes 78A and 78B to the injection nozzles 74A and 74B, respectively. Further, only clean water is separately collected and supplied to the water supply tank unit 35C for reuse.

 The apparatus main body 32 is filled with water WL as the same liquid as the high-pressure water as the high-pressure liquid mixed with the spherical zircon beads, and the two injection nozzles 74A and 74B are the leg portions of the support block 33. Is supported and fixed so as to be immersed in the water WL, and the tips of at least two spray nozzles 74A and 74B are supported and fixed so as to be immersed in the water WL. The two injection nozzles 74A and 74B are moved horizontally so that the injection port is positioned at substantially the same height as the mild steel bar W1 as the workpiece, and the mild steel bar W1 as the workpiece is moved. It is supported and fixed so that it faces diagonally in the opposite direction. That is, it corresponds to the invention of claim 7.

 When high-pressure water mixed with approximately spherical spherical zircon beads as shown in the SEM photograph of FIG. 3 is jetted from the two jet nozzles 74A and 74B, the speed is about three times the speed of sound (Mach 3). It is sprayed on the surface of the round bar-shaped workpiece W1, whereby the scale on the surface of the round bar-shaped workpiece W1 is scraped off and removed more powerfully and at a high speed. Furthermore, since the two injection nozzles 74A and 74B are mounted so as to be inclined obliquely in the direction opposite to the direction in which the mild steel bar W1 as the workpiece moves, the high-pressure water mixed with the spherical zircon beads is round bar-shaped. The scale is removed more efficiently by spraying obliquely in the direction opposite to the moving direction of the workpiece W1.

  Here, the distance between the tips of the two injection nozzles 74A and 74B and the surface of the round bar-shaped workpiece W1 is set to 40 mm to 50 mm as in the sixth and seventh embodiments. It has been found that scale removal can be performed more efficiently by setting this distance in the range of 25 mm to 70 mm, more preferably in the range of 30 mm to 50 mm. The reason for this is that if this distance is too large, the momentum of the high-pressure water sprayed on the surface of the round bar-shaped workpiece W1 will be weakened. Conversely, if this distance is too small, almost spherical spherical zircon beads will be mixed. This is probably because the high-pressure water does not spread sufficiently.

  Further, as shown in FIG. 15, the high-pressure water sprayed from the two spray nozzles 74A and 74B is set so as to be sprayed out of the longitudinal direction of the surface of the round bar-shaped workpiece W1. Yes. The reason is that if the high-pressure water sprayed from the two spray nozzles 74A and 74B is sprayed at the same position in the longitudinal direction of the surface of the round bar-shaped workpiece W1, the sprayed high-pressure water collides with each other. Since the momentum may be diminished, the two injection nozzles 74A and 74B are displaced from each other in the longitudinal direction by shifting the installation positions of the two injection nozzles 74A and 74B. The jet nozzle diameter of the two jet nozzles 74A and 74B is about 2 mm. It has been found that the scale can be removed more efficiently by setting the spray nozzle diameter in the range of about 0.1 mm to about 6 mm, more preferably in the range of about 1 mm to about 3 mm.

  Further, in the scale removing apparatus 71 according to the eighth embodiment, a transparent acrylic resin water tank is used as the apparatus main body 32, but an opaque stainless steel water tank or the like can also be used. By using a water tank made of transparent acrylic resin, the inside of the apparatus main body 32 can be easily observed, and the high pressure water mixed with the spherical zircon beads ZB can be checked. It is done.

  Also, in the scale removing device 71 according to the eighth embodiment, as in the sixth and seventh embodiments, every time the scale wrinkles are collected using the spherical zircon bead collecting device 77 shown in FIG. Since the spherical zircon beads mixed water is extracted from 32 to remove impurities such as scale soot and recover the spherical zircon beads ZB, it contributes to a reduction in running costs and a reduction in industrial waste.

  Thus, in the scale removing device 71 and the scale removing method according to the eighth embodiment, spherical zircon beads as spherical fine particles close to true spheres are mixed in high-pressure water as a high-pressure liquid as an abrasive, In addition, by installing and fixing the two injection nozzles 74A and 74B so as to inject high-pressure water over the entire outer peripheral surface of the round bar-shaped workpiece W1, the round bar-shaped workpiece W1 is not damaged. Also, the scale removal efficiency is high, and the scale can be removed uniformly at a significantly low cost.

  In each of the above embodiments, water is used as the liquid used as the “high-pressure liquid”, and water is mostly used in normal scale removal, but in special cases, a polymer aqueous solution having a higher viscosity than water. Liquids other than water, such as, can also be used. Further, in each of the above embodiments, only a case where a plurality of injection nozzles are installed at intervals in the longitudinal direction of a round bar-shaped workpiece to inject high-pressure liquid without using a partition plate will be described. However, particularly when three or more injection nozzles are installed, when the longitudinal interval is made closer, it is preferable to provide two or more partition plates that separate the three or more injection nozzles from each other. .

  Further, in each of the above embodiments, only the case where the spherical zircon beads ZB are used as “spherical fine particles close to a true sphere” has been described. Spherical fine particles made of other materials can also be used as long as they are close to a sphere and difficult to crush.

  In carrying out the present invention, the configuration, shape, quantity, material, size, arrangement, connection relationship, etc. of other parts of the scale removing device, and other steps of the scale removing method are also described in the above embodiments. The form is not limited.

FIG. 1 is a perspective view showing an overall configuration of a scale removing apparatus according to Embodiment 1 of the present invention. Fig.2 (a) is a front view which shows the structure of the support block of the scale removal apparatus concerning Embodiment 1 of this invention, (b) is a bottom view. FIG. 3 is a view showing an SEM (scanning electron microscope) photograph of spherical zircon beads as spherical fine particles close to a true sphere used in the scale removing apparatus and scale removing method according to the first embodiment of the present invention. FIG. 4 is a block diagram showing a configuration of a spherical zircon bead collecting device used in the scale removing device and the scale removing method according to the first embodiment of the present invention. FIG. 5 is a perspective view showing the overall configuration of the scale removing apparatus according to the second embodiment of the present invention. FIG. 6 is a longitudinal sectional view showing the configuration of the main part of the scale removing apparatus according to the third embodiment of the present invention. FIG. 7A is a perspective view showing the configuration of the main part of the scale removing apparatus according to Embodiment 4 of the present invention, and FIG. 7B is a longitudinal sectional view. FIG. 8 is a perspective view showing the overall configuration of the scale removing apparatus according to Embodiment 5 of the present invention. FIG. 9A is a front view showing the structure of the support block of the scale removing device according to the fifth embodiment of the present invention, and FIG. 9B is a bottom view. FIG. 10 is a perspective view showing the entire configuration of the scale removing apparatus according to Embodiment 6 of the present invention. FIG. 11: is a longitudinal cross-sectional view which shows the structure of the injection nozzle used for the scale removal apparatus and scale removal method concerning Embodiment 6 of this invention. FIG. 12 is a block diagram showing a configuration of a spherical zircon bead collection device used in the scale removing device and the scale removing method according to the sixth embodiment of the present invention. FIG. 13A is a front view showing the structure of the support block of the scale removing device according to Embodiment 6 of the present invention, and FIG. 13B is a bottom view. FIG. 14: is a perspective view which shows the whole structure of the scale removal apparatus concerning Embodiment 7 of this invention. FIG. 15 is a perspective view showing the entire configuration of the scale removing apparatus according to Embodiment 8 of the present invention.

Explanation of symbols

1, 11, 31, 51, 61, 71 Scale removal device 2, 12, 32 Device main body 2A, 12A, 32A Work material inlet 2B, 12B, 32B Work material outlet 3, 33 Support block 4A, 4B, 4C, 14A, 14B, 14C, 14D, 21, 26, 34A, 34B, 54A, 54B, 54C, 64A, 64B, 64C, 64D, 74A, 74B Injection nozzles 5A, 5B, 5C, 15A, 15B, 15C, 15D, 35A , 35B High pressure pump 5D, 15E, 35C Water supply tank unit 23 Cascade cover 28 Cylindrical cover 40 Spherical zircon beads recovery device 41 Magnet separator & oil schema 42 Cyclone separator 43 Chip removal filter 44 Recovery liquid tank 45 Fragment removal device 55 , 65, 75 Spherical fine particle supply devices 57, 67, 77 Jo particle recovery device BL, WL liquid W1, W2, W3, W4 round rod workpiece ZB spherical fine particles (spherical zircon beads)

Claims (16)

A device for removing scales generated on the surface of a long round bar-shaped workpiece,
An apparatus main body capable of filling a liquid to a predetermined height; and
A sealed work material inlet for putting the round bar-shaped work material provided on the side surface of the device body into the device body;
A sealed workpiece that takes out the round bar-like workpiece provided from the side of the apparatus main body at a position that is substantially the same height as the workpiece inlet and substantially symmetrical to the workpiece inlet. A material outlet,
2 spaced apart from a line connecting the workpiece inlet and the workpiece outlet by a predetermined distance and having an angle of about 180 degrees to each other and fixed below a predetermined height at which the liquid in the apparatus body is filled. Two injection nozzles that inject high-pressure liquid from the direction onto the surface of the round bar-shaped workpiece;
A high-pressure pump for supplying the high-pressure liquid to the two injection nozzles,
The liquid and the high-pressure liquid are the same liquid,
The two injection nozzles are provided to inject the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece,
Filling the liquid up to the predetermined height, mixing spherical fine particles close to a true sphere having higher hardness than the round bar-shaped workpiece as an abrasive, and jetting the high-pressure liquid from the two jet nozzles A scale removing device, wherein the scale on the surface of the round bar-shaped workpiece is removed by moving the round bar-shaped workpiece through the apparatus main body. A device for removing scales generated on the surface of a long round bar-shaped workpiece,
An apparatus main body capable of filling a liquid to a predetermined height; and
A sealed work material inlet for putting the round bar-shaped work material provided on the side surface of the device body into the device body;
A sealed workpiece that takes out the round bar-like workpiece provided from the side of the apparatus main body at a position that is substantially the same height as the workpiece inlet and substantially symmetrical to the workpiece inlet. A material outlet,
At least about 95 degrees to about 170 degrees with respect to each other, fixed at a predetermined distance from a line connecting the workpiece inlet and the workpiece outlet and below a predetermined height at which the liquid in the apparatus body is filled. Three or more injection nozzles that inject high-pressure liquid onto the surface of the round bar-shaped workpiece from three directions angled within a range;
A high-pressure pump for supplying the high-pressure liquid to the three or more injection nozzles,
The liquid and the high-pressure liquid are the same liquid,
The three or more spray nozzles are provided so as to spray the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece,
Filling the liquid up to the predetermined height, mixing spherical fine particles close to a true sphere having a hardness higher than that of the round bar-shaped workpiece as an abrasive, and jetting the high-pressure liquid from the three or more jet nozzles However, the scale removing apparatus is characterized in that the scale on the surface of the round bar-shaped workpiece is removed by moving the round bar-shaped workpiece through the apparatus main body. A device for removing scales generated on the surface of a long round bar-shaped workpiece,
An apparatus main body capable of filling a liquid to a predetermined height; and
A sealed work material inlet for putting the round bar-shaped work material provided on the side surface of the device body into the device body;
A sealed workpiece that takes out the round bar-like workpiece provided from the side of the apparatus main body at a position that is substantially the same height as the workpiece inlet and substantially symmetrical to the workpiece inlet. A material outlet,
2 spaced apart from a line connecting the workpiece inlet and the workpiece outlet by a predetermined distance and having an angle of about 180 degrees to each other and fixed below a predetermined height at which the liquid in the apparatus body is filled. Two injection nozzles for injecting spherical fine particles close to a true sphere having a higher hardness than the high pressure liquid and the round bar-shaped workpiece from the direction, onto the surface of the round bar-shaped workpiece;
A high pressure pump for supplying the high pressure liquid to the two injection nozzles;
A spherical fine particle supply device that supplies spherical fine particles close to the true sphere to the two injection nozzles and mixes in the high-pressure liquid;
The liquid and the high-pressure liquid are the same liquid,
The two injection nozzles are provided to inject the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece,
Filling the liquid into the apparatus body up to the predetermined height and spraying the high-pressure liquid, in which spherical fine particles close to the true sphere are mixed, from the two spray nozzles, the round bar-shaped work material. A scale removing device, wherein the scale on the surface of the round bar-like workpiece is removed by moving the body through. A device for removing scales generated on the surface of a long round bar-shaped workpiece,
An apparatus main body capable of filling a liquid to a predetermined height; and
A sealed work material inlet for putting the round bar-shaped work material provided on the side surface of the device body into the device body;
A sealed workpiece that takes out the round bar-like workpiece provided from the side of the apparatus main body at a position that is substantially the same height as the workpiece inlet and substantially symmetrical to the workpiece inlet. A material outlet,
At least about 95 degrees to about 170 degrees with respect to each other, fixed at a predetermined distance from a line connecting the workpiece inlet and the workpiece outlet and below a predetermined height at which the liquid in the apparatus body is filled. Three or more injection nozzles that inject high-pressure liquid and spherical fine particles close to a true sphere having a higher hardness than the round bar-shaped workpiece from the three directions angled within the range. When,
A high pressure pump for supplying the high pressure liquid to the three or more injection nozzles;
A spherical fine particle supply device that supplies spherical fine particles close to the true sphere to the three or more injection nozzles and mixes in the high-pressure liquid;
The liquid and the high-pressure liquid are the same liquid,
The three or more spray nozzles are provided so as to spray the high-pressure liquid at positions shifted from each other in the longitudinal direction of the round bar-shaped workpiece,
Filling the liquid up to the predetermined height in the main body of the apparatus, and injecting the high-pressure liquid mixed with spherical fine particles close to the true sphere from the three or more injection nozzles, the round bar-shaped workpiece A scale removing device, wherein the scale on the surface of the round bar-like workpiece is removed by moving the device main body through.   5. The apparatus according to claim 1, further comprising one partition plate that separates the two spray nozzles from each other or two or more partition plates that partition the three or more spray nozzles from each other. The scale removing apparatus according to any one of the above.   6. The two injection nozzles or the three or more injection nozzles are provided in an integrated support block having a shape surrounding the round bar-shaped workpiece. The scale removing device according to one.   All or part of the two injection nozzles or the three or more injection nozzles are attached to be inclined in the opposite direction to the moving direction of the round bar-shaped workpiece. The scale removing apparatus according to any one of claims 1 to 6. It is a method of removing the scale generated on the surface of a long round bar-shaped workpiece,
While passing through the round bar-shaped workpiece through a liquid in which spherical fine particles close to a true sphere whose hardness is higher than that of the round bar-shaped workpiece as an abrasive are passed through the round bar-shaped workpiece, the same liquid is pressurized from the injection nozzle in the liquid. The injection nozzle is moved so that the high-pressure liquid is sprayed around the entire circumference of the round bar-shaped workpiece, or a plurality of jet nozzles are disposed around the position where the round bar-shaped workpiece passes. A scale removing method, characterized in that a high-pressure liquid is sprayed around the entire circumference of the round bar-shaped workpiece after being fixed individually. It is a method of removing the scale generated on the surface of a long round bar-shaped workpiece,
While passing the round bar-shaped workpiece through the liquid, the same liquid in which spherical fine particles close to a true sphere whose hardness is higher than that of the round bar-shaped workpiece as a polishing material is mixed in the liquid from the injection nozzle. The injection nozzle is moved so that a high-pressure liquid mixed with spherical fine particles close to the true sphere is sprayed around the entire circumference of the round bar-shaped workpiece, or the injection nozzle is moved to the round bar-like shape. A scale removing method characterized by spraying a high-pressure liquid in which spherical fine particles close to the true sphere are mixed around the round bar-shaped workpiece, and a plurality of the rods are fixed around a position where the workpiece passes. .   The scale removing device according to claim 1, wherein the distance from the tip of the injection nozzle to the surface of the round bar-shaped workpiece is within a range of 25 mm to 70 mm. The scale removal method according to claim 9.   The scale removal apparatus or the scale removal method according to any one of claims 1 to 10, wherein an ejection nozzle diameter of the ejection nozzle is within a range of 0.1 mm to 6 mm.   12. The spherical fine particles close to a true sphere having a hardness higher than that of the round bar-shaped work material are spherical fine particles having a specific gravity of 3.0 or more and 7.0 or less. The scale removal apparatus or scale removal method as described in any one of these.   The scale removing apparatus or the scale removing method according to claim 12, wherein the spherical fine particles having a specific gravity of 3.0 or more and 7.0 or less, which are nearly spherical, are spherical zircon beads.   The scale removing apparatus or the scale removing method according to claim 13, wherein the spherical zircon beads have a particle diameter in a range of 10 µm to 800 µm.   The scale removing device or the scale according to any one of claims 1 to 14, wherein a speed of the high-pressure liquid ejected from the ejection nozzle is equal to or higher than a sound speed (about 332 m / sec) in the atmosphere. Removal method.   The spherical fine particles close to the true sphere sprayed on the round bar-like workpiece are separated from the scale scraped off from the round bar-like workpiece and recovered and reused. The scale removing apparatus or the scale removing method according to any one of claims 1 to 15.