JP5231819B2 - Wet blasting equipment - Google Patents

Description

  The present invention relates to a wet blasting apparatus.

  Conventionally, so-called wet blasting, in which a slurry in which abrasive grains and liquid are mixed is pressurized with pressurized air, is sprayed onto a workpiece from an injection port, and the workpiece is inspected for processing such as burr processing and wear testing by the wet blasting. Various proposals have been made on the wet blasting technology for applying the above, and various nozzle bodies for jetting the wet blast well have been proposed.

  By the way, for example, in order to uniformly process the surface of a large workpiece having a width of 600 mm or the like by wet blasting technology, a nozzle body for wet blasting in which the nozzle nozzle has a slit shape having a width of 600 mm or more is prepared. By moving the work relative to the nozzle body, means for processing the entire surface of the work as simultaneously as possible is employed.

  However, it is extremely troublesome to inject wet blast from such slit-shaped injection ports in a uniform mixed state. This is because the wider the injection port, the easier it is for the concentration of abrasive grains in the slurry to increase or decrease depending on the location.

  Therefore, in a nozzle body having a slit-shaped injection port having a width of 200 mm or more, slurry (abrasive grains and liquid) and air injected from the injection port cannot be in a uniform mixed state. Processing irregularities would occur and there was a problem that precise processing and inspection could not be performed.

  Therefore, the present applicant has proposed a nozzle body disclosed in Japanese Patent No. 3540713 in order to solve the above-described problems, and this nozzle body is a lead-out passage through which the slurry stored in the slurry storage chamber leads. Are provided in a porous structure in which small holes are arranged side by side, and an air injection passage through which air leading out this slurry from the slurry storage chamber passes is provided in a porous structure in which small holes are arranged in parallel. With this configuration, the slurry (abrasive grains and liquid) sprayed from the long slit-shaped spray port and air can be made into a uniform mixed state, which is extremely innovative and extremely practical.

Japanese Patent No. 3540713

  The present inventor has advanced further research and development on a wet blasting apparatus including a nozzle body that injects the air-and-slurry mixed injection material from the slit-like injection unit. Developed an innovative wet blasting device that demonstrates

  The gist of the present invention will be described with reference to the accompanying drawings.

An air injection unit 2 is provided in the vicinity of a slurry storage chamber 1 in which a slurry in which abrasive grains and liquid are mixed is introduced and temporarily stored, and pressurized air is injected from the air injection unit 2. wherein the slurry reservoir 1 slurry is derived and mixed the with the slurry air is sent into the mixing chamber 3, injecting the injection material 4 and the air and the slurry was mixed from the slit-shaped injection portion 5 In the wet blasting apparatus including the nozzle body 6, the mixing chamber 3 has the same width as the injection unit 5, and air is injected from the air injection unit 2 into the slurry. In this case, the slurry is led out from the slurry storage chamber 1 through the slurry lead-out portion 12, and the slurry lead-out portion 12 has a porous structure in which a plurality of slurry lead-out holes 13 opened in the mixing chamber 3 are arranged in parallel. the air injection unit 2 is the mixing chamber 3 The air injection holes 7 which open a plurality juxtaposed with porous structure, also, the is provided in the corresponding positional relationship between the air-jetting hole 7 wherein each slurry outlet hole 13, also, each air injection holes 7 is provided with an air supply portion 8 for supplying the air separately, and each air supply portion 8 is provided with a valve portion 11 for blocking the passage of the air. It concerns the device.

2. The wet blasting apparatus according to claim 1, wherein a protective layer made of urethane resin is provided at a portion of the nozzle body 6 through which the slurry passes.

The wet blasting apparatus according to any one of claims 1 and 2, wherein the valve unit 11 is an electromagnetic valve.

  Since the present invention is configured as described above, it becomes possible not only to inject the injection material from the entire area of the slit-like injection unit at a predetermined injection pressure, but also to inject it partially at a predetermined injection pressure. For example, it is possible to vary the injection width of the injection material according to the size (width) of the workpiece, so that efficient processing without waste can be performed, and the injection material is partially applied to the workpiece surface. Innovative that exhibits unprecedented effects such as arbitrary processing (for example, processing that changes the properties of the workpiece surface, processing that forms a pattern on the workpiece surface, etc.) can be performed by spraying. It becomes a wet blasting device.

  Embodiments of the present invention considered to be suitable will be briefly described with reference to the drawings.

  When pressurized air is ejected from the air ejecting section 2, the slurry is led out from the slurry storage chamber 1, the slurry and air are sent to the mixing chamber 3 and mixed, and the air and slurry are mixed. The material 4 is jetted from the slit-like jet part 5.

  The air injection unit 2 has a porous structure in which a plurality of air injection holes 7 opened in the mixing chamber 3 are arranged side by side. From this configuration, the injection material 4 that is injected by mixing air and slurry is well injected onto the workpiece. The

  Specifically, each air injection hole 7 provided in the air injection unit 2 serves as an orifice, and the air injected from the air injection unit 2 is injected in a rectified state, and in a turbulent state Compared with the case of jetting, the air flow velocity becomes fast and constant instead of the air pressure. Therefore, the nozzle body 6 of this structure has very little air energy loss (the pressure of the air and the jetting material 4). When the flow rate is compared, the flow rate of the spray material 4 is not significantly reduced.) Therefore, the spray material 4 that is jetted by mixing air and slurry is well jetted onto the workpiece and good machining is performed. It will be.

  Further, according to the present invention, an air supply unit 8 that supplies air to each air injection hole 7 is connected in series, and the air supply unit 8 is provided with an air supply control mechanism that stops the supply of air. Thus, it is possible to perform good processing that was impossible in the past.

  That is, when the width of the workpiece is narrower than the width of the slit-shaped injection portion, conventionally, the waste of the injection material that is not injected to the workpiece, the electric power is used more than necessary, and problems such as energy loss have occurred ( If a plurality of nozzle bodies having different widths of the injection section are prepared according to the width of the workpiece, the cost becomes high.)

  In this regard, according to the present invention, since the slurry is not accelerated and the machining force cannot be obtained when the air supply of the air supply portion 8 of one air injection hole 7 is stopped from the above-described configuration, the machining force can be obtained at an arbitrary portion. Can be obtained.

  Therefore, it is possible to always inject the injection material 4 from the entire area of the slit-like injection unit 5 at a predetermined injection pressure, as well as to partially inject the injection material 4 at a predetermined injection pressure. The injection width of the injection material 4 can be varied according to the width), and efficient processing without waste can be performed.

  In addition, the present invention provides an arbitrary process by partially injecting the spray material 4 onto the work surface, for example, a process for changing the properties of the work surface, a process for forming a pattern (gradation pattern or the like) on the work surface, and the like. Thus, various processes can be performed.

  Further, the present invention can be performed without a mask by appropriately changing the injection portion of the injection material 4 while performing the processing that has been conventionally performed using a mask.

  A specific embodiment of the present invention will be described with reference to the drawings.

  In the present embodiment, an air injection unit 2 is provided in the vicinity of a slurry storage chamber 1 in which a slurry in which abrasive grains and liquid are mixed is introduced and temporarily stored, and air pressurized from the air injection unit 2 is supplied. By being injected, the slurry is led out from the slurry storage chamber 1, the slurry and the air are sent to the mixing chamber 3 and mixed, and the injection material 4 in which the air and the slurry are mixed is injected into a slit shape. It is a wet blasting device provided with a nozzle body 6 sprayed from the section 5.

  Specifically, in this embodiment, as shown in FIG. 1, a slurry reservoir 22 disposed at a lower position of the processing body 21 for storing the workpiece, and the slurry reservoir 22 through the pump device 23 is disposed. A slurry transport unit 24 that transports slurry into the processing body 21 and a nozzle body 6 that is disposed in the processing body 21 and that injects the slurry transported by the slurry transport unit 24. The slurry injected from the nozzle body 6 is stored in the slurry reservoir 22 below the processing body 21 and reused.

  As shown in FIGS. 1 to 4, the nozzle body 6 has a long member 14 that is long in the width direction and short in the front-rear direction, and is provided continuously below the long member 14 so as to be long and thin in the width direction. It is composed of a long plate-like member 15 and block-like fitting members 16 (a front body 16A and a rear body 16B) which are continuously provided on the upper portion of the long member 14. The long member 14, the plate-like member 15, and the fitted member 16 are made of a material that does not deform as much as possible, for example, a metal material.

  As shown in FIG. 4, a mixing chamber 1 is provided between the lower part of the long member 14 and the upper part of the plate-like member 15, and an air jet opening into the mixing chamber 1 is provided below the long member 14. The air injection part 2 formed by arranging the holes 7 (round hole parts) side by side is provided.

  The air injection hole 7 is connected to a through hole 14a provided in the long member 14 as shown in FIGS. 3, 4 and 5, and this long member 14 is provided in the fitted member 16 (rear body 16B). The through hole 16a is connected.

  A plurality of (eight) through-holes 14 a of the long member 14 are arranged in the length direction of the long member 14, one end is connected to the air injection hole 7, and the other end is the long member 14. It is provided so as to open on one side.

  A plurality (eight) of the through holes 16a of the fitted member 16 are provided so that one end thereof is connected to each of the through holes 14a opened on one side surface of the long member 14 described above. The other end is provided so as to open on the upper surface of the fitted member 16.

  The through hole 14a and the through hole 16a are components of the air supply unit 8, and each through hole 16a includes the through hole 14a, the through hole 16a, and the air supply path 10a. An air supply path 10a extending from the air supply source 10 and branching into eight paths is connected.

  In addition, each air supply unit 8, more specifically, each air supply path 10a, is provided with a valve unit 11 (electromagnetic valve) that blocks the passage of air, and each valve unit 11 is a computer (not shown). ) Is controlled.

  Therefore, when each air injection hole 7 for injecting air is controlled by this air supply control mechanism, that is, when the supply of air is stopped by closing the valve portion 11, it corresponds to the stopped air injection hole 7. The derivation of the slurry from the slurry derivation hole 13 is suppressed, and the action of the slurry is not exhibited (the slurry is not accelerated, so the processing force cannot be obtained). Therefore, the slit-like injection part 5 has a predetermined injection pressure. The injection material 4 can be injected from an arbitrary position with an arbitrary width.

  That is, FIG. 5 shows the portion of the injection unit 5 that is located in a straight line with the air injection holes 7 through which air is supplied to only three of the eight air injection holes 7. However, the position and the number of the air injection holes 7 for injecting air can be arbitrarily set. Therefore, the injection unit 5 has a predetermined injection pressure. The injection material 4 can be injected from an arbitrary position with an arbitrary width.

  An independent air supply source 10 may be provided for each of the air supply passages 10a, and the pressure of the air injected from an arbitrary number of air injection holes 7 is varied, and the injection pressure of the injection material 4 injected from the injection unit 5 May be made different depending on the part.

  In addition, a slurry outlet 12 formed by juxtaposing slurry injection holes 13 that open to the mixing chamber 3 is provided below the long member 14.

  Specifically, the slurry lead-out portion 12 is constituted by a slurry lead-out hole 13 provided in a penetrating manner in the long member 14 as shown in FIG.

  A plurality (eight) of the slurry outlet holes 13 are arranged in parallel in the length direction of the long member 14, one end opens into the mixing chamber 3 provided in the lower portion of the long member 14, and the other end is long. The members 14 are arranged side by side so as to open on the other side surface.

  Therefore, the slurry lead-out part 12 has a length in the slit width direction of the slit-like injection part 5 described later, and a structure in which the slurry lead-out holes 13 are arranged in parallel in the length direction of the slurry lead-out part 12. Become.

  The slurry outlet holes 13 are set to have a one-to-one correspondence with the air injection holes 7. That is, in plan view, the through hole 14a, the air injection hole 7, and the slurry outlet hole 13 are provided on the same vertical plane.

  In addition, an opening that opens on the other side of the long member 14 in the slurry outlet hole 13 is connected to the slurry storage chamber 1.

  As shown in FIGS. 4 and 6, the slurry storage chamber 1 is provided inside the fitted member 16 (front body 16 </ b> A), and the above-described slurry transport unit 24 is connected to the upper portion of the slurry storage chamber 1. A slurry introduction portion 17 for introducing the slurry is provided in an open state on the upper surface of the fitted member 16, and a slit-like slurry lead-out passage for drawing the slurry from the slurry storage chamber 1 on the side of the slurry storage chamber 1. 18 is provided on the inner wall surface of the fitted member 16 in an open state.

  As shown in FIG. 4, the slurry outlet passage 18 is configured to be in communication with each slurry outlet hole 13 provided in the elongated member 14 when the elongated member 14 is fitted with the fitted member 16. ing.

  In the present embodiment, the opening portions on the mixing chamber 3 side of the air injection holes 7 in the air injection portion 2 described above are positioned below the opening portions on the mixing chamber 3 side of the slurry outlet holes 13 in the slurry outlet portion 12 described above. It is set to be.

  When air is supplied from the air injection hole 7 to the mixing chamber 3 by this configuration, the mixing chamber 3 side opening of the air injection unit 2 and the mixing chamber 3 side of the slurry outlet 12 are caused by the downward movement of the air. A negative pressure is generated between the openings, so that the slurry is sucked from the opening of the slurry outlet 12 on the side of the mixing chamber 3 and led out into the mixing chamber 3, where the slurry, the air, Will be mixed.

  The plate-like member 15 is provided therein with a slit-like passage path 15 a communicating with the mixing chamber 3, a lower portion of the passage path 15 a is opened, and this opening is set in the slit-like injection unit 5. .

  Further, in the present embodiment, a protective layer made of urethane resin (not shown) is coated on the path through which the slurry passes among the above-described components. This protective layer prevents slurry (especially abrasive grains) from polishing the path through which the slurry passes, and the existence of this protective layer confirms that the life of the nozzle body is extended several times. Has been.

Further, the urethane resin, the long member, each member What happened plate-like member and fitted member is provided as a sealing member to the site abuts.

  Moreover, the structure which does not provide a urethane resin as much as possible is employ | adopted for the path | route through which only air passes. This is because the urethane resin has a large surface frictional resistance, and if the urethane resin is present, the pressure of the pressurized air is lost due to the contact between the urethane resin and the pressurized air.

  Since the present embodiment is configured as described above, an air supply unit 8 that supplies air to each air injection hole 7 is connected to the air injection unit 2, and the air supply unit 8 stops supplying the air. From this configuration, when the supply of air to the air supply portion 8 of one air injection hole 7 is stopped, the air supply control mechanism is led out from the slurry outlet hole 13 corresponding to the air injection hole 7. The slurry is not accelerated and no machining force can be obtained, and therefore a predetermined machining force can be obtained at an arbitrary portion of the slit-like injection unit 5. Therefore, not only the process of always injecting the injection material 4 with the predetermined injection pressure from the entire area of the slit-like injection unit 5 but also the partial injection with the predetermined injection pressure can be performed. The injection width of the injection material 4 injected from the injection unit 5 can be varied according to the width), and efficient processing without waste can be performed.

  Also, in this embodiment, arbitrary processing is performed by partially injecting the spray material 4 onto the workpiece surface, for example, processing for changing the properties of the workpiece surface, or processing for forming a pattern (gradation pattern or the like) on the workpiece surface. Various processing such as can be performed.

  Further, in the present embodiment, the processing that has been conventionally performed using a mask can be performed without a mask by appropriately changing the injection portion of the injection material 4.

  In this embodiment, the air supply path 10a branched from the air supply source 10 is connected to the base end portion of each of the air injection holes 7 whose tip ends open into the mixing chamber 3, and each of these air supplies Since the air supply control mechanism is configured by providing the valve portion 11 for blocking the passage of air in the passage 10a, any processing can be performed satisfactorily by controlling each air injection hole 7.

  In the present embodiment, the air injection part 2 has a length in the slit length direction of the slit-like injection part 5, and a plurality of air injection holes 7 are arranged in the length direction of the air injection part 2. Therefore, as disclosed in Japanese Patent No. 3540713, slurry (abrasive grains and liquid) and air can be sprayed from the spray section 5 in a uniform mixed state.

  Further, in the present embodiment, when air is injected from the air injection unit 2, the slurry is derived from the slurry storage chamber 1 through the slurry deriving unit 12 having a predetermined length, and the slurry deriving unit 12 is mixed. Since it is a porous structure in which a plurality of slurry outlet holes 13 opened in the chamber 3 are arranged side by side, as disclosed in Japanese Patent No. 3540713, slurry (abrasive grains and liquid) and air are uniformly mixed from the injection unit 5 Will be able to be injected.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is a schematic explanatory drawing which shows the use condition of a present Example. It is a perspective view of a present Example. It is the explanatory disassembled perspective view which made the principal part of the back body and the elongate member of a present Example the cross section. It is a sectional side view of a present Example. It is AA sectional drawing in FIG. 4 which shows the use condition of a present Example. It is BB sectional drawing in FIG. 4 which shows the principal part of a present Example.

DESCRIPTION OF SYMBOLS 1 Slurry storage chamber 2 Air injection part 3 Mixing chamber 4 Injection material 5 Injection part 6 Nozzle body 7 Air injection hole 8 Air supply part
11 Valve
12 Slurry outlet
13 Slurry outlet hole

Claims (3)

An air injection unit is provided in the vicinity of a slurry storage chamber in which a slurry in which abrasive grains and a liquid are mixed is introduced and temporarily stored, and pressurized air is injected from the air injection unit to thereby store the slurry storage. wet which is the slurry derived from the chambers the air and the slurry was mixed sent to the mixing chamber, and the injection material between the air and the slurry was mixed comprising a nozzle body for ejecting from the slit-shaped injection portion In the blast device, the mixing chamber has the same width as the injection unit, and the slurry has a slurry lead-out unit from the slurry storage chamber when air is injected from the air injection unit. The slurry outlet portion has a porous structure in which a plurality of slurry outlet holes that open to the mixing chamber are arranged in parallel, and the air injection portion has an air injection hole that opens to the mixing chamber. Multiple juxtaposed A pore structure, also, the the respective air injection hole and the respective slurry outlet hole provided in a corresponding positional relation, also, the air supply unit is above the respective air jetting holes for supplying the air to each separate A wet blasting apparatus characterized in that a valve portion for preventing passage of the air is provided in each air supply portion. 2. The wet blasting apparatus according to claim 1, wherein a protective layer made of urethane resin is provided at a portion of the nozzle body through which the slurry passes. The wet blasting apparatus according to claim 1, wherein an electromagnetic valve is employed as the valve portion.

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