KR102006673B1 - Apparaus for machining bearing using diamond coated shank - Google Patents

Abstract

The present invention relates to a bearing processing apparatus for processing a bearing made of silicon carbide. The apparatus comprises: a bearing support part comprising a placement block and a fixing jig for fixing a bearing and a transfer part for moving the fixing jig; a shank processing part comprising a carbide shank having a tip with diamond electrodeposited thereon to process the bearing, and a shaft for transferring the carbide shank by fixing the carbide shank; a water spray part spraying water to the bearing; an air spray part spraying air to the bearing; and a bed part installed in the lower part of the carbide shank and the fixing jig to support the bearing support part. The carbide shank includes: a body part having the shape of a round bar; and a coating part placed at a tip of the body part with diamond electrodeposited thereon. The coating part is used to process the bearing.

Description

Apparaus for machining bearing using diamond coated shank}

The present invention relates to a bearing processing apparatus using a cemented carbide shank, and more particularly, to a bearing processing apparatus using a diamond electrodeposited carbide shank that can effectively process the inner diameter and key groove of a silicon carbide ceramic bearing. It is about.

Generally, a bearing is a device mounted between a rotating element and a non-rotating element to facilitate the rotation of the rotating element. Currently, various bearings such as roller bearings, tapered bearings and needle bearings are used.

The bearing comprises a part connected to a non-rotating element, a part connected to a rotating element and a rolling element interposed between the two parts. For example, a wheel bearing includes an inner ring (and / or hub) connected to one of the wheels or the vehicle body, an outer ring connected to the other of the wheels or the vehicle body, and a rolling element interposed between the outer ring and the inner ring. At this time, the surface of the parts such as the outer ring and the inner ring which are in contact with the rolling element is called the raceway surface of the bearing. Lubricant is supplied between the raceway surface and the rolling element to reduce friction of the contact surface.

In the related art, the track surface is formed as a mirror surface on which no irregularities are formed, or a method of forming irregularities on the raceway surface by laser, etching, and machining is used. Etching is a processing method using chemical corrosion, and laser beam machining is a processing method of locally heating a workpiece by converting light energy of a laser into thermal energy. In particular, laser processing is widely used for fine machining of mechanical parts.

On the other hand, cracking and indentation of the surface to be processed in the process of forming the bearing surface of the bearing may be damaged. In addition, the processing of the unevenness by laser, etching and mechanical work requires a long processing time and expensive processing equipment. Accordingly, various methods for precise machining of expensive bearings without damage have been studied.

(Prior patent)

Korea Patent Registration No. 10-0587726 (June 1, 2006)

SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing processing apparatus using a cemented carbide shank that can process the inner surface and keyway of a silicon carbide bearing formed by high temperature and high pressure sintering easily cracked by weak external force with high precision. It is for.

In addition, another object of the present invention is to provide a bearing processing apparatus using a cemented carbide shank electrode is electrodeposited with improved process efficiency by easily controlling the frictional heat and dust generated during processing.

In addition, another object of the present invention to provide a bearing processing apparatus using a cemented cemented carbide shank that can dry grinding the inner diameter and key groove of the bearing to improve the dimensional precision and to have a uniform quality irrespective of the operator's skill. For sake.

According to an aspect of the present invention, embodiments of the present invention, in a bearing processing apparatus for processing a bearing made of silicon carbide, comprising a seating block for fixing the bearing and a fixing jig, and a transfer unit for moving the fixing jig Bearing support; Shank processing part consisting of a cemented carbide shank, the shaft is fixed to the carbide shank to transfer the carbide shank fixed to the end to process the bearing; A water spray unit for spraying water onto the bearing side; An air injection unit for injecting air to the bearing side; And a bad part provided at a lower portion of the fixing jig and the cemented carbide shank to support the bearing support, wherein the cemented shank has a body portion provided in the form of a round bar, and a diamond is electrodeposited on the end of the body portion. It relates to a bearing processing apparatus using a cemented carbide shank electrode including a portion and the diamond for processing the bearing using the coating.

The cemented carbide shank is made of a cemented carbide material including WC, WC-TiC-Co, WC-Co, Wc-TiC-Co, and the end of the body portion is provided with a cutting portion that is formed by grinding using a diamond wheel. In addition, the diamond powder mixture may be electrodeposited on the cutting part to form a coating part.

The body portion is provided to extend in one direction, but the length of the coating portion with respect to the length of the body portion may be provided with a length of 5% to 20%.

The coating part is prepared by mixing the diamond powder, tungsten carbide carbide as a cemented carbide, and cobalt powder as a bind metal in benzene in a slurry form, followed by spray drying to prepare a mixed powder, and the mixed powder is 900 ℃ to 1200 ℃. After performing a plasma heat treatment at a temperature of, the mixed powder may be provided by coating on the end of the body portion by a supersonic flame spraying process.

The diamond powder, tungsten carbide powder and cobalt powder has an average particle diameter of 150㎛ to 240㎛, the supersonic flame spraying fuel gas flow rate of 4.2 ~ 6.0 gph, oxygen flow rate of 1400 ~ 2000 scfh, thermal spraying The distance is 330 ~ 430 mm, the feed amount of the composite powder is 30 ~ 70 g / min and the fuel gas may be any one of hydrogen, kerosene, natural gas.

Machining the first groove of the bearing or the second groove, the carbide shank may include a first carbide shank for processing the first groove of the bearing, and a second carbide shank for processing the second groove. Can be.

The first cemented carbide shank comprises a first body portion having a circular cross section, and a first coating portion formed by electrodeposition of diamond provided at the end of the first body portion, wherein the first body portion is coated with the first coating portion. It consists of a 1-1 body portion and a 1-2-2 body portion provided with a smaller diameter than the 1-1 body portion, wherein the first coating portion of the edge of the one surface on one side of the distal end of the 1-1 body portion Diamonds may be electrodeposited so as to be spaced apart from each other.

The second cemented carbide shank comprises a second body portion having a circular cross section, and a second coating portion formed by electrodeposition of diamond on the end of the second body portion, wherein the second body portion has a cylindrical shape extending from one end to the other end. Is provided in the form of a rod, the second coating portion may be provided on the side of the end of the body portion so that the flat surface of one end of the second body portion is exposed.

The fixing jig supports the side of the bearing, and the seating block may be fastened with the fixing jig to fix the fixing jig.

The seating block may include a jig insertion portion provided in a form corresponding to a lower portion of the fixing jig and a plurality of sliding bars protruding in a rod form from the inner circumferential surface of the jig insertion portion so that the lower portion of the fixing jig is inserted therein.

The fixing jig is provided with the widest area, the lower block inserted into the jig insertion unit, the intermediate block stacked on top of the lower block but provided with a smaller area than the lower block to fix a part of the bearing and the middle Stacked on top of the block but provided with a smaller area than the intermediate block is composed of an upper block for fixing a part of the bearing, the lower block is provided with a sliding groove provided in a shape corresponding to the sliding bar so that the sliding bar is inserted; The fixing jig may be inserted into and fixed to the jig insertion unit of the seating block, and the sliding groove may be inserted into the sliding bar by sliding.

The water spray unit may spray water toward the bearing.

The water spray unit comprises a pipe to which water is supplied, and a spray unit connected to the pipe to spray water to the work table, wherein the spray unit is connected to the head unit to which water is sprayed, and the head unit rotates up, down, left, and right. The support spring is connected to enable this, it is provided at the end of the support spring portion may be made of a fixed portion connected to the pipe by screwing.

The bad part is recessed inwardly from the outer surface of the bad part and connected to one or more water guide parts for guiding the flow of water sprayed from the water spray part and one end of the water guide part to receive water flowing along the water guide part. The nozzle may be further provided.

The water guide part includes a main flow passage connected in one direction and a plurality of sub flow passages vertically connected to the main flow passage, and the main flow passage is parallel to the bearing and the carbide shank at a lower side of the bearing and the carbide shank. The sub channel may be connected to be inclined toward the lower side from the main channel, and the end of the sub channel may be connected to the nozzle.

The air spray member is sprayed air toward the bearing, but is provided at a position higher than the water spray member, the air spray member is connected to the spray portion having a hole through which the air is injected and the spray portion is connected to the spray portion up and down, left and right The bellows portion provided to be rotatable and the nozzle portion connected to the bellows portion to supply air can be formed.

The cemented shank may be provided with a body part provided in the form of a round bar, a coating part provided with diamonds at one end of the body part, and a screw groove part formed concavely in a screw shape at the other end of the body part.

The cap portion provided with urethane is inserted into the screw groove portion, and the cap portion is provided to accommodate the other end of the body portion, and a screw thread is provided at an inner circumference to screw the screw groove portion provided at the other end, and the outer surface of the cap portion It may be made of an embossed shape having a plurality of protrusions.

An adhesive fixing part may be further provided between the end of the body part and the coating part so that the coating part is firmly attached to the outer surface of the body part.

The adhesion fixing part may be formed of a surface uneven layer formed by sanding the outer surface of the end of the body portion and a pretreatment layer formed by irradiating the outer surface of the surface uneven layer with ultraviolet light having a wavelength of 253.7 nm for 2 seconds to 3 seconds. have.

In order to clean the foreign substances of the surface irregularities layer before the pretreatment layer and to prevent the adhesion of dust to the surface irregularities layer, the cleaning agent and the antistatic agent are mixed in a weight ratio of 95wt%: 5wt%. It may further comprise spray spraying.

The cleaning agent includes at least one solvent from the group consisting of lower alcohols such as methanol, ethanol and isopropyl alcohol, and the antistatic agent includes fatty acid esters, sorbitan fatty acid esters and alkyls of polyoxyethylene alkyl amines. It may include at least one or more from the group consisting of phosphates.

The cemented shank may include a body portion provided in the form of a round bar, a coating portion in which diamond is electrodeposited at one end of the body portion, and a fastening protrusion projecting outwardly perpendicularly to the other end of the body portion.

The shaft may be connected to a body portion provided to rotate the cemented shank and a holder portion provided at one end of the body portion and having a shank insertion hole into which the other end of the cemented shank is inserted.

The inner circumference of the holder portion is provided with a fastening groove for concave inwardly the fastening projection is inserted into the fixing groove, the shank insertion hole is a vertical groove extending vertically from one end of the holder portion and the vertical groove at the end of the vertical groove It may be made of a horizontal groove connected vertically to.

The fastening protrusion is formed of a buffer portion consisting of a protrusion projecting perpendicularly from the outer surface of the body portion and a urethane resin having an elastic force at the end of the protrusion, the cemented shank is inserted into the shank insertion hole, the fastening protrusion is the vertical groove After the insertion, the fastening protrusion may be fixed to the horizontal groove by rotating the cemented shank.

The fastening protrusion is provided with a speed sensor to detect the rotational speed of the cemented shank, and transmit the detected speed to the control unit to control the rotation of the shaft.

According to the present invention as described above, bearing machining using diamond carbide electrodeposited shank, which can process the inner surface and the keyway of the silicon carbide bearing formed by high temperature and high pressure sintering, which are easily cracked by weak external force, with high precision. A device can be provided.

In addition, according to the present invention it is possible to provide a bearing processing apparatus using a cemented carbide shank electrode is electrodeposited with improved process efficiency by easily controlling the frictional heat and dust generated during processing.

In addition, according to the present invention it is possible to provide a bearing processing apparatus using a cemented carbide shank electrode which can dry grinding the inner diameter and key groove of the bearing so as to improve the dimensional precision and to have a uniform quality irrespective of the operator's skill.

1 is a view showing a bearing processing apparatus using a cemented carbide shank electrode according to an embodiment of the present invention.
FIG. 2A is a perspective view of the cemented carbide shank of FIG. 1.
FIG. 2B is a photograph of the cemented carbide shank of FIG. 1.
3 is a perspective view of the body portion of the cemented carbide shank of FIG.
4 is a perspective view of a bearing machined according to FIG. 1.
5A is a perspective view of a machined bearing.
5b is a photograph of a machined bearing.
FIG. 6 is a view from above of a cemented carbide shank used to machine the bearings of FIGS. 5A and 5B;
FIG. 7 is a view illustrating the cemented carbide shank of FIG. 6 from the side.
8 is a perspective view of the cemented carbide shank of FIG.
9A is a perspective view of a cemented carbide shank according to another embodiment of the present invention.
9B is a photograph of a cemented carbide shank according to another embodiment of the present invention.
FIG. 10 is a side view of a cemented carbide shank used to machine a bearing. FIG.
FIG. 11 is a cross-sectional view of the cemented carbide shank of FIG. 10.
12 is a view illustrating the shank processing part of FIG. 1.
FIG. 13 is a cross-sectional view of the assembly of FIG. 12.
14 and 15 are views sequentially showing the operation of the bearing processing apparatus using a cemented carbide shank electrode.
16 is an exploded perspective view of the mounting block and the fixing jig of FIG.
17 is a perspective view of the spray unit of FIG. 1.
18 is a view illustrating the water guide part of FIG. 1 from an upper surface thereof.
19 is a cross-sectional view taken along line BB of FIG. 18.
20 is a perspective view of a cemented carbide shank according to another embodiment of the present invention.
FIG. 21 is an enlarged view of a portion A of FIG. 20.
22 is a view illustrating a cemented carbide shank coupled to a shaft according to another embodiment of the present invention.
FIG. 23 is a view schematically illustrating a holder part of the shaft of FIG. 22.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms. In the following description, when a part is connected to another part, it is only directly connected. It also includes cases where other media are connected in between. In the drawings, parts irrelevant to the present invention are omitted for clarity, and like reference numerals designate like parts throughout the specification.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a view showing a bearing processing apparatus using a cemented carbide shank electrode according to an embodiment of the present invention.

FIG. 2 is a perspective view of the cemented carbide shank of FIG. 1, and FIG. 2B is a photograph of the cemented carbide shank of FIG. 1. 3 is a perspective view of the body portion of the cemented carbide shank of FIG. 4 is a perspective view of a bearing machined according to FIG. 1. 5A is a perspective view of a machined bearing, and FIG. 5B is a photograph of the machined bearing. 6 is a view showing the cemented carbide shank used to process the bearing of FIG. 5A from the top, FIG. 7 is a view showing the cemented carbide shank of FIG. 6 from the side, and FIG. 8 is a perspective view of the cemented carbide shank of FIG. . 9A is a perspective view of a cemented carbide shank according to another embodiment of the present invention. 9B is a photograph of a cemented carbide shank according to another embodiment of the present invention. FIG. 10 is a side view of a cemented carbide shank used to machine a bearing. FIG. FIG. 12 is a view illustrating the shank processing part of FIG. 1, and FIG. 13 is a view illustrating a cross section of FIG. 12. 14 and 15 are views sequentially showing the operation of the bearing processing apparatus using a cemented carbide shank electrode. 16 is an exploded perspective view of the mounting block and the fixing jig of FIG. 17 is a perspective view of the spray unit of FIG. 1. FIG. 18 is a view illustrating the water guide part of FIG. 1 from an upper surface thereof, and FIG. 19 is a cross-sectional view taken along B-B of FIG. 18.

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One embodiment of the present invention relates to a bearing processing apparatus for processing a bearing made of silicon carbide, the mounting block 52 and the fixing jig 51 for fixing the bearing 10, and the mounting block 52 Bearing support portion 50 consisting of a conveying portion 53 for moving the; Shank processing part 46 consisting of a cemented carbide shank 100, the cemented carbide shank 100 is fixed to the end to process the bearing 10, the shaft 44 for transporting the cemented shank 100 ; A water spray unit 70 spraying water onto the bearing side; An air injection unit 80 for injecting air to the bearing side; And a bad part 60 provided below the fixing jig 52 and the cemented shank 100 to support the bearing support 50, and a bearing processing apparatus using a cemented cemented carbide. .

The cemented shank 100 includes a body portion 110 that is provided in the form of a round bar, and a coating portion 120 in which diamond is electrodeposited at the end of the body portion 110 and by using the coating portion 120. The bearing 10 can be processed.

In general, a motor rotary bearing product made of silicon carbide (SiC) is produced as a semi-finished product through a sintering process, and then completed through a precision grinding process and a polishing process. In the case of the product sintered by molding at high temperature and high pressure due to the characteristics of the material of silicon carbide, it is possible to mold oil grooves or key grooves, but when the shape of the molding is not uniform and used as a precision motor bearing, the assembling process Eccentricity and shake are caused by the problem.

In addition, silicon carbide has high abrasion resistance and durability due to the characteristics of the material, and has a hard and high strength property next to diamond, which is poor in workability, and when machining a material made of silicon carbide, it is not easy to cut unless it is a diamond tool. In addition, it requires a high level of processing technology, such as problems such as fragile due to weak impact in the process of processing.

As a method of processing a bearing made of silicon carbide, it is carried out by dry operation during cutting, in which the process is difficult due to heat generation and severe dust generation, and in particular, the technology of machining the oil grooves or inner diameter key grooves of the bearings is very difficult. As a result, defects frequently occur and become a problem.

On the other hand, the bearing processing apparatus using the cemented carbide shank according to the present embodiment is made of silicon carbide can be easily processed with high precision and bearings having high strength and wear resistance. The bearing processing apparatus using the cemented carbide shank is used in the process of grinding precision grooves such as oil grooves on the side of the bearing, inner keyways, etc. by using a new diamond cemented carbide shank instead of the diamond wheel generally used. The bearing grinding operation can be performed efficiently with high dimensional accuracy.

In the case of processing a silicon carbide bareley using a bearing processing device using a cemented carbide shank according to the present embodiment, it is possible to easily control the heat and dust generated during processing to improve the processing precision and improve the working environment. Can be.

The bearing 10 may be made of silicon carbide material, and may be used as a precision motor bearing. The bearing 10 may be polished using a cemented carbide shank 100 in which diamond is electrodeposited. Carbide shank 100 according to the present embodiment is a body portion 110 made of a cemented carbide material including WC, WC-TiC-Co, WC-Co, Wc-TiC-Co and the end of the body portion 110 It may be made of a coating part 120 formed by coating diamond powder or the like.

The cutting part 111 is formed to grind the end of the body part 110 by using a diamond wheel, and the coating part 120 is formed by electrodepositing the diamond powder mixture on the cutting part 111. Can be. The cutting part 111 may be variously modified according to the shape of the groove or hole for grinding the bearing 10. Preferably, the cutting part 111 may be formed on the cutting part 111 with respect to the groove or hole of the bearing 10. It may be formed in consideration of the thickness of the coating portion 120 is formed in.

The body portion 110 is provided to extend in one direction, but the length (a2) of the coating portion with respect to the length (a1) of the body portion bearing processing using a diamond shank electrodeposited diamond is provided with a length of 5% to 20% Device.

If the length (a2) of the coating portion is provided less than 5% of the length (a1) of the body portion, the process time for grinding the bearing 10 is increased, and if the bearing is provided in excess of 20% Part of grinding the bearing 10 is increased in the process of grinding (10) has a disadvantage in that it is difficult to process the shape of the precise groove by the shaking of the cemented shank 100.

The coating part 120 is prepared by mixing the diamond powder, tungsten carbide carbide, and tungsten carbide powder, and cobalt powder, a binder metal, in a slurry form, and then spray drying to prepare a mixed powder. After performing plasma heat treatment at a temperature of ℃ to 1200 ℃, the mixed powder may be provided by coating on the end of the body portion 110 by a supersonic flame spraying process.

The diamond powder, tungsten carbide powder and cobalt powder has an average particle diameter of 150㎛ to 240㎛, the supersonic flame spraying fuel gas flow rate of 4.2 ~ 6.0 gph, oxygen flow rate of 1400 ~ 2000 scfh, thermal spraying The distance is 330 ~ 430 mm, the feed amount of the composite powder is 30 ~ 70 g / min and the fuel gas may be any one of hydrogen, kerosene, natural gas.

The diamond powder, tungsten carbide powder and cobalt powder are prepared by spray drying after spray drying, and the mixed powder is sieved using a sieve to have an average particle diameter of 150 μm to 240 μm. Can be. If the average particle diameter is less than 150 µm, the grinding ability of the cemented carbide shank is lowered, and if the average particle diameter is greater than 240 µm, the bearing is difficult to be accurately ground.

The plasma heat treatment can improve the strength of the mixed powder formed by mixing the diamond powder, tungsten carbide powder and cobalt powder, the density and strength of the particles through the neck growth (neck growth) and particle growth by the plasma heat treatment Is improved. In the plasma heat treatment, if the temperature is less than 900 ° C., the organic substance introduced into the composite powder remains without being removed, and the predetermined strength of the composite powder is not secured. Wastes unnecessary energy and reduces process efficiency.

Subsequently, by performing supersonic flame spraying, the mixed powder may be attached to one end of the body part 110 to form a coating part 120. Preferably, the supersonic flame spray is 5 gph fuel gas flow rate, oxygen flow rate is 2000 scfh, the spraying distance is 350 mm, the feed amount of the composite powder is 50 g / min and the fuel gas may use natural gas.

In the cemented shank 100, the coating part 120 is mixed with not only diamond powder but also tungsten carbide powder, thereby improving bonding strength with the cemented shank 100 and improving durability and surface uniformity of the coating part 120. By further improving, the bearing 10 can be processed with high precision.

The bearing processing apparatus using the cemented carbide shank according to the present embodiment may process the first groove 11 of the bearing 10a or the second groove 12 of the bearing 10a. 9A and 9B, a groove 13 may be formed at an end thereof to process the second groove 12 of the bearing 10a.

The carbide shank 100 includes a first carbide shank 100a for processing the first groove 11 of the bearing 10a and a second carbide shank 100b for processing the second groove 12. can do.

The first cemented carbide shank 100a includes a first body part 110a having a circular cross section and a first coating part 120a formed by electrodepositing diamonds provided at ends of the first body part 110a. The first body part 110a is formed of a first-first body part 111 to which the first coating part 120a is coated and a diameter smaller than that of the first-first body part 111. It is made of 1-2 body portion 112, the first coating portion 120a is provided with diamonds so as to be spaced apart from each other along the edge of the one surface on one surface of the end of the first-first body portion 111. Can be.

The second cemented shank 100b includes a second body part 110b having a circular cross section, and a second coating part 120b formed by electrodepositing diamond at the end of the second body part 110b. The second body part 110b is provided in the form of a cylindrical rod extending from one end to the other end, and the second coating part 120b has a flat surface 113 of one end of the second body part 110b. It may be provided on the side of the end of the body portion 110b to be exposed.

The bearing 10 may be fixed to the device by a fixing jig 51 and a mounting block 52. The fixing jig 51 may support the side surface of the bearing 10, and the fixing jig 51 may be fastened to the mounting block 52 to be fixed to the mounting block 52.

The seating block 52 is provided on the inner circumferential surface of the jig inserting portion 52a and the jig inserting portion 52a which are provided in a form corresponding to the lower portion of the fixing jig 52 so that the lower portion of the fixing jig 51 is inserted. It may be composed of a plurality of sliding bars (52b) protruding in the form of a rod.

The fixing jig 51 is provided with the widest area and is stacked on the lower block 51a inserted into the jig inserting portion 52a and on the upper portion of the lower block 51a, but smaller than the lower block 51a. It is provided with a middle block 51b for fixing a part of the bearing (10) and stacked on top of the intermediate block (51b) is provided with a smaller area than the intermediate block 51b to provide a portion of the bearing (10) Sliding groove (51d) is formed of the upper block (51c) for fixing, the lower block (51a) is provided in a shape corresponding to the sliding bar (52b) to be inserted into the sliding bar (52b). .

The fixing jig 51 may be inserted into and fixed to the jig insertion portion 52a of the seating block 52, but the sliding groove 51d may be inserted into the sliding bar 52b by sliding.

The fixing jig 51 is slidably inserted and fixed by the sliding groove 51d and the sliding bar 52b of the mounting block 52 so that the fixing jig 51 can be easily coupled to the mounting block 52. Can be. As a result, when the fixing jig 51 is worn, the fixing jig 51 may be easily detached from the seating block 52 to be replaced.

In addition, according to this embodiment, the bearing 10 is fixed through the mounting block 52 and the fixing jig 51 is ground through the cemented shank 100 is rotated left or right while rotating or moving left and right at high speed. Can be. At this time, the bearing 10 is fixed by the moving speed of the bearing 10 and the cemented shank 100 while generating heat, dust, etc. due to friction due to the movement direction of the bearing 10 and the cemented shank 100. It may be out of position and cause a defect.

On the other hand, the coupling of the seating block 52 and the sliding groove 51d and the sliding bar 52b of the fixing jig 51 according to the present embodiment may be fixed by a force opposite to the rotational movement direction of the bearing 10. As a result, the bearing 10 may be more stably fixed. In addition, since the seating block 52 and the fixed jig 51 are slid and fastened in a direction opposite to the moving direction of the bearing 10, the seating block 52 is fastened to or detached from the fixed jig 51. It can be easily carried out, so that cleaning and parts replacement operations can be performed efficiently.

The transfer part 53 may be connected to one side upper end of the bed part 60. The seating block 52 and the fixing jig 51 fix the bearing 10, and rotate by the power of the motor provided in the bed part 60 to rotate the fixed bearing 10. At this time, the bearing 1 is ground by the cemented shank 100.

The shank processing unit 46 is provided so as to face apart from the seating block 52 and the fixing jig 51, coupled to the cemented carbide shank 100 and the cemented carbide shank 100, the cemented shank 100 It may be made of a shaft 44 for rotating.

On the upper end of the bed portion 60, the horizontal movable stand 16 is placed. The horizontal movable table 16 is moved in the horizontal direction (X-axis direction) by the rail 14 installed on the upper surface of the bed unit 60 according to the operation of the adjusting handle 18. The vertical slide 22 is placed on the horizontal slide 16. The vertical movable table 22 is moved in the vertical direction (Y-axis direction) by the rail 20 installed on the upper surface of the horizontal movable table 16 according to the operation of the adjusting handle 24.

The fixing table 26 is installed on the vertical movable table 22. The holder 26 has a rectangular shape, the insertion portion 28 is recessed in the circumferential surface. The insertion portion 28 is fitted with the fitting piece 34 of the cylindrical tube 32 to be described later. In addition, a plurality of bolts 30 are vertically fastened to the outer periphery of the upper surface of the fixing table 26, and the bolts 30 press-fit the fitting piece 34 fitted to the insertion part 28.

The holder 26 is provided with a cylindrical tube (32). The cylindrical tube 32 is a bracket for fixing the shaft driver 40 for driving the cemented carbide shank 100 to the holder 26, and a space is formed therein to allow the shaft driver 40 to be fitted therein. At one end, the fitting piece 34 is formed to extend. The fitting piece 34 is press-fixed with the bolt 30 in a state of being fitted to the insertion portion 28 of the holder 26 to fix the cylindrical tube 32 to the holder 26. In addition, another bolt 36 is vertically penetrated at the upper end of the cylindrical tube 32, and the bolt 36 presses and fixes the shaft driving part 40 fitted into the cylindrical tube 32. In addition, a hole 38 is formed at an upper end of the cylindrical tube 32, and the hole 38 exposes the switch 42 mounted on the shaft driver 40 to the outside.

As mentioned above, the shaft driving unit 40 is fitted into the cylindrical tube 32 and fixedly installed on the fixing stand. The shaft driving unit 40 is connected to an external power source and an electric wire 50 and is provided at the top of the switch 42. Drive according to the switching operation.

Carbide shank 100 is installed on the shaft 44 of the shaft driving part 40. The cemented shank 100 is rotated at a high speed by the drive of the shaft driving part 40 to form a groove or a hole by grinding the inner circumferential surface of the bearing 10. That is, the cemented carbide shank 100 is vertically moved in the state in which it is inserted into the bearing 10 in accordance with the above-described operation of the horizontal movable base 16 in the state coupled to the shaft 44 of the shaft driving unit 40 ( After contacting the inner circumferential surface of the bearing 10 by the operation of 22), and moves back to the operation of the transverse table 16 to process the inner circumferential surface of the bearing (10).

Machining of the bearing 10 by the bearing processing apparatus using the cemented carbide shank according to the present embodiment, is primarily fixed to the seating block 52 and the fixing jig 51 of the bed portion 60. .

Subsequently, the fitting piece 34 of the cylindrical tube 32 is inserted into the insertion portion 28 of the fixing table 26, and the fitting piece 34 is pressurized and fixed by the bolt 30 to fix the cylindrical tube 32 to the fixing table ( 26, the shaft driving portion 40 is inserted into the cylindrical tube 32, and the inserted shaft driving portion 40 is fixed by pressing the bolt 36.

Thereafter, the cemented shank 100 is moved forward in the state in which the cemented shank 100 is fastened to the shaft 44 of the shaft driving unit 40 to move the cemented shank 100 to the seating block 52 and the fixing jig ( After inserting into the bearing 10 which is bitten by 51, the vertically movable table 22 is operated to contact the superhard shank 100 with the inner circumferential surface of the bearing 10.

Next, when the power is applied to the shaft drive unit 40 to rotate the cemented shank 100 at high speed, and at the same time to move the transverse table 16 to the rear, the cemented shank 100 is the inner peripheral surface of the bearing 10 In the contacted state to move backwards to cut the inner peripheral surface of the bearing 10 to form a groove or a hole. When the processing of one groove or hole is finished as described above, the mounting block 52 and the fixing jig 51 are rotated at an angle, and the above-described operations are repeatedly performed, and a plurality of grooves or the inner peripheral surface of the bearing 10 are formed. The holes are continuously formed to have a predetermined direction and shape.

The water spray unit 70 may spray water toward the bearing 10. The water spray unit 70 may be formed of a pipe 71 to which water is supplied, and a spray unit 72 connected to the pipe 71 to spray water to the work table 60. The spray unit 72 is connected to the head portion 72a to which water is sprayed, the head portion 72a, and a support spring portion 72b to which the head portion 72a is rotatable up, down, left and right, and the support. It is provided at the end of the spring portion (72b) may be made of a fixing portion (72c) connected by screwing the pipe.

At least one water guide part 61 and the water guide part are provided in the bad part 60 to be concave inward from the outer surface of the bad part 60 to guide the flow of water sprayed from the water spray part 70. A nozzle 62 connected to one end of the 61 and configured to receive water flowing along the water guide part 61 may be further provided.

The water guide portion 61 is composed of a main flow passage 61a connected in one direction, and a plurality of sub flow passages 61b vertically connected to the main flow passage 61a, and the main flow passage 61a is the bearing. 10 extending parallel to the cemented shank 100, the sub-channel 61b is connected to be inclined toward the lower side from the main channel 61a, and the end of the sub-channel 61b is connected to the nozzle. And 62.

The support spring portion 72b connected to the head portion 72a in the spray portion 72 may be provided in a bellows shape to allow vertical, left, and right rotation. Accordingly, the position of the head portion 72a can be easily changed to control the position at which water is injected. In addition, a fixing portion 72c is provided at the end of the support spring portion 72b, and may be fixed by screwing with a pipe made of a metal to which water is transferred from the outside.

The spray part 72 is detached from the pipe 71 by the fixing part 72c, and thus, the repair and the like can be easily performed. In addition, the amount of water discharged may be controlled by removing the spray unit 72 from the pipe 71 and closing the opening to which the fixing unit 72c is fastened using a stopper or the like.

Water flowing from the bed portion 60 is first collected in the main flow passage 61a of the water guide portion 61, and then a nozzle is provided at the end of the sub flow passage 61b through the sub flow passage 61b. Can be discharged through 62. Thus, the bad part 60 may be contaminated by water or may be prevented from interfering with the work.

The air injection member 80 may inject air toward a bearing, but may be provided at a position higher than that of the water injection member 70.

The air injection member 80 is connected to the spray unit 81 having a hole through which air is injected and the bellows unit 82 connected to the spray unit 81 so as to rotate the spray unit 81 up, down, left, and right. And a nozzle part 83 connected to the bellows part 82 to supply air.

The air injection member 80 is provided on the upper portion of the water injection member 70, it is possible to auxiliary control the heat generation, dust, and the like that can not be controlled by the water sprayed through the water injection member (70). In addition, the position of the spray unit 81 is injected into the air injection member 80 by the bellows portion 82 in the air injection member 80, thereby making it possible to change the overall bearing processing device using a cemented carbide shank electrode Dust and the like can be prevented from accumulating and abrasion of the device.

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 20 to 23. Except for the content to be described later, since it is similar to the content described in the embodiment described in Figures 1 to 19, detailed description thereof will be omitted.

20 is a perspective view of a cemented carbide shank according to another embodiment of the present invention, and FIG. 21 is an enlarged view of portion A of FIG. 20.

20 and 21, the cemented carbide shank 200 according to the present embodiment includes a body portion 210 provided in the form of a round bar, and a coating in which diamond is electrodeposited at one end of the body portion 210. A portion 220 and a screw groove portion 230 which is concave in a screw form may be provided at the other end of the body portion 210.

A cap portion 240 made of urethane is inserted into the screw groove portion 230, and the cap portion 240 is provided to accommodate the other end of the body portion 210, and the screw groove portion 230 and the screw provided at the other end thereof. Screw thread 241 is provided on the inner circumference to be coupled, and the outer surface of the cap portion 240 may be formed of an embossed form 242 having a plurality of protrusions.

The cap portion 240 is provided to accommodate the other end of the body portion 210 in the form of a cap provided with a screw thread 241 on the inner circumference and the screw groove portion 230 provided at the other end of the body portion 210 and It may be firmly provided on the body portion 210 by screwing. In addition, the outer surface of the cap portion 240 is provided in an embossed form 242 to increase the contact area of the portion fixing the cemented shank 200 through the cap portion 240, and also the strength of the cap portion 240 Can improve.

The cap 240 may provide a friction force in the cemented shank 200 having a smooth outer surface to firmly fix the cemented shank 200, and the cemented shank by the force applied to the cemented shank 200 during processing. It is possible to prevent the 200 from declining and deteriorating the precision of the machining.

An adhesive fixing part 230 may be further provided between the distal end 211 of the body part 210 and the coating part 220 so that the coating part 220 is firmly attached to the outer surface of the body part 210. Can be.

The adhesion fixing portion 230 has a wavelength of 253.7 nm on the outer surface of the surface irregularities layer 231 and the surface irregularities layer 231 formed by sanding the outer surface of the end 211 of the body portion 210 with sandpaper. It may be made of a pretreatment layer 232 formed by irradiating ultraviolet light for 2 to 3 seconds.

Before the pretreatment layer 232 is provided, the cleaning agent and the electrostatic agent are applied to the surface irregularities layer 231 to clean the foreign substances of the surface irregularities layer 231 and prevent the dust from adhering to the surface irregularities layer 231. The spraying agent may further include spraying the inhibitor in a weight ratio of 95 wt%: 5 wt%.

The cleaning agent includes at least one solvent from the group consisting of lower alcohols such as methanol, ethanol and isopropyl alcohol, and the antistatic agent includes fatty acid esters, sorbitan fatty acid esters and alkyls of polyoxyethylene alkyl amines. It may include at least one or more from the group consisting of phosphates.

The coating unit 220 may be more firmly attached by removing dust, oil, and the like remaining at the end 211 of the body 210 using the cleaner. In addition, by further including an antistatic agent in the cleaning agent, it is possible to prevent foreign matters from adhering to the outer surface of the body portion 210 in the air. Since the cleaner and the antistatic agent are included in the above-described range, the body portion 210 can be easily meticulous and the amount of the antistatic agent can be controlled to a predetermined range or less, thereby preventing unnecessary production costs from increasing.

Subsequently, after washing with the detergent, the cemented shank 200 may be dried at room temperature for 1 day, and then the surface concave-convex layer 231 may be irradiated with ultraviolet rays. The ultraviolet light may modify the surface of the surface irregularities layer 231.

When ultraviolet rays are irradiated on the surface of the metal surface concave-convex layer 231, carbon atoms (-CO), carboxyl groups (-COOH), and hydroxyl groups are bonded to the free electrons existing in the metal surface and oxygen in the air. Since radicals, such as (-OH), generate | occur | produce, the polarity of a surface becomes high and it becomes easy to adhere with polymeric resin, such as a diamond powder binder, of a coating part which has polarity. In this case, it is the minimum requirement that the energy of ultraviolet ray is higher than the binding energy of the molecule. The energy of ultraviolet ray having a wavelength of 253.7 nm is 471.5 KJ / mol, which is carbonyl group (-CO), carboxyl group (-COOH), hydroxyl group. Higher than the binding energy of the molecule of (-OH) can be formed efficiently.

In order to remove the release agent, dust, stain and mechanical oil on the surface of the surface irregularities layer 231 before irradiating the ultraviolet rays, a solvent having a large difference from the solubility parameter of the wiring material polymer material is used as a cleaning agent. It may further include doing.

22 is a view illustrating a cemented carbide shank coupled to a shaft according to another embodiment of the present invention, and FIG. 23 is a view schematically illustrating a holder part of the shaft of FIG. 22.

Referring to FIGS. 22 and 23, the cemented carbide shank 300 according to the present embodiment has a body portion 310 provided in the form of a round bar and a coating in which diamond is electrodeposited at one end of the body portion 310. A part 320 and a fastening protrusion 330 protruding outwardly perpendicularly to the other end of the body part 310 may be included.

The shaft 350 is provided at one end of the body portion 351 and the body portion 351 provided to rotate the cemented shank 300 shank insertion hole into which the other end of the cemented shank 300 is inserted ( Holder portion 352 having a 353 may be connected.

The inner circumference of the holder part 352 is provided with a fastening groove 354 in which the fastening protrusion 330 is inserted and fixed inwardly, and the shank insertion hole 353 has one end of the holder part 352. A vertical groove 354a extending vertically at an end portion and a horizontal groove 354b vertically connected to the vertical groove 354a at the end of the vertical groove 354a.

The fastening protrusion 330 may include a protrusion 330a vertically protruding from the outer surface of the body portion 310 and a buffer portion 330b made of a urethane resin having elastic force at the end of the protrusion 330a. .

The cemented shank 300 is inserted into the shank insertion hole 353, and the fastening protrusion 330 is inserted along the vertical groove 354a, and then the cemented shank 300 is rotated to fasten the fastening protrusion 330. Is fixed to the horizontal groove 354b, the fastening protrusion 330 is provided with a speed sensor 330c detects the rotational speed of the cemented shank 300, and transmits the detected speed to the control unit shaft 350 ) Can be controlled.

The shaft 350 is made of metal and is connected to the cemented carbide shank 300 through the body 351 and the holder 352, and the shaft 350 is rotated by a motor to form the cemented shank 300. By rotating the grinding operation of the bearing can be performed. At this time, the rotation speed, the rotation angle and the like of the cemented shank 300 may affect the processing precision of the bearing that is the object to be processed.

In this embodiment, by providing a speed sensor 330c on the fastening protrusion 330 at the other end of the cemented carbide shank 300 to sensitively detect the rotational speed of the cemented carbide shank 300, and to the control unit (not shown) By transmitting, the rotation speed of the shaft 350 can be controlled by controlling the motor through the control unit. Thereby, the processing precision of a process target object can be improved further.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

10, 10a: bearing
50: bearing support
60: bad part
70: water spray unit
80: air injection unit
100, 100a, 100b, 200, 300: cemented carbide shank

Claims (10)

In the bearing processing apparatus for processing a bearing made of silicon carbide,
A bearing support (50) comprising a seating block (52) for fixing the bearing (10), a fixing jig (51), and a conveying part (53) for moving the fixing jig (51);
Shank processing part 46 consisting of a cemented carbide shank 100, the cemented carbide shank 100 is fixed to the end to process the bearing 10, the shaft 44 for transporting the cemented shank 100 ;
A water spray unit 70 spraying water onto the bearing side;
An air injection unit 80 for injecting air to the bearing side; And
The fixing jig 51 and the lower portion of the cemented shank 100 is provided with a bed portion 60 for supporting the bearing support portion 50;
The cemented shank 100 includes a body portion 110 that is provided in the form of a round bar, and a coating portion 120 in which diamond is electrodeposited at the end of the body portion 110 and by using the coating portion 120. Machine the bearing 10,
The coating unit 120,
Diamond powder, tungsten carbide carbide as a cemented carbide, and cobalt powder as a bind metal are mixed in benzene to prepare a slurry, followed by spray drying to prepare a mixed powder, and the mixed powder is heat treated at a temperature of 900 ° C. to 1200 ° C. After performing, the mixed powder is provided by coating on the end of the body portion 110 by a supersonic flame spraying process,
The diamond powder, tungsten carbide powder and cobalt powder is provided with an average particle diameter of 150㎛ to 240㎛,
The supersonic flame sprayer has a flow rate of 4.2 to 6.0 gph, an oxygen flow rate of 1400 to 2000 scfh, a spraying distance of 330 to 430 mm, a feed rate of a composite powder of 30 to 70 g / min, and the fuel gas is hydrogen or kerosene. , Bearing processing device using a cemented carbide shank electrode of natural gas. The method of claim 1,
The cemented shank 100 is made of cemented carbide including WC, WC-TiC-Co, WC-Co, and Wc-TiC-Co, and the end of the body portion 110 is ground using a diamond wheel to step It is provided with a cutting portion 111 is formed to lose,
Electrode diamond powder mixture on the cutting portion 111 to form a coating portion 120,
The body portion 110 is provided to extend in one direction, but the length (a2) of the coating portion with respect to the length (a1) of the body portion bearing processing using a diamond shank electrodeposited diamond is provided with a length of 5% to 20% Device. delete The method of claim 1,
Process the first groove 11 of the bearing, or the second groove 12,
The carbide shank 100 includes a first carbide shank 100a for processing the first groove 11 of the bearing 10a and a second carbide shank 100b for processing the second groove 12. and,
The first cemented carbide shank 100a includes a first body part 110a having a circular cross section and a first coating part 120a formed by electrodepositing diamonds provided at ends of the first body part 110a. The first body part 110a is formed of a first-first body part 111 to which the first coating part 120a is coated and a diameter smaller than that of the first-first body part 111. It is made of 1-2 body portion 112, the first coating portion 120a is provided with diamonds so as to be spaced apart from each other along the edge of the one surface on one surface of the end of the first-first body portion 111. Become,
The second cemented shank 100b includes a second body part 110b having a circular cross section, and a second coating part 120b formed by electrodepositing diamond at the end of the second body part 110b. The second body part 110b is provided in the form of a cylindrical rod extending from one end to the other end, and the second coating part 120b has a flat surface 113 of one end of the second body part 110b. Bearing processing apparatus using a cemented carbide shank electrode is provided on the side of the end of the body portion (110b) to be exposed. The method of claim 1,
The fixing jig 51 supports the side surface of the bearing 10, and the seating block 52 is fastened to the fixing jig 51 so as to fix the fixing jig 51.
The seating block 52 is provided on the inner peripheral surface of the jig inserting portion 52a and the jig inserting portion 52a which are provided in a form corresponding to the lower portion of the fixing jig 51 so that the lower portion of the fixing jig 51 is inserted. Consists of a plurality of sliding bars (52b) protruding in the form of a rod,
The fixing jig 51 is provided with the widest area and is stacked on the lower block 51a inserted into the jig inserting portion 52a and on the upper portion of the lower block 51a, but smaller than the lower block 51a. It is provided with a middle block 51b for fixing a part of the bearing (10) and stacked on top of the intermediate block (51b) is provided with a smaller area than the intermediate block 51b to provide a portion of the bearing (10) It consists of an upper block (51c) for fixing, the lower block (51a) is provided with a sliding groove (51d) provided in a shape corresponding to the sliding bar (52b) so that the sliding bar (52b) is inserted,
The fixing jig 51 is inserted and fixed to the jig insertion portion 52a of the seating block 52, but the sliding groove 51d is a cemented carbide shank electrode is inserted into the sliding bar (52b) is inserted Used bearing processing equipment. The method of claim 1,
The water spray unit 70 injects water toward the bearing 10,
The water spray unit 70 is composed of a pipe 71 to which water is supplied, and a spray unit 72 connected to the pipe 71 to spray water to the work table 60.
The spray unit 72 is connected to the head portion 72a to which water is sprayed, the head portion 72a, and a support spring portion 72b to which the head portion 72a is rotatable up, down, left and right, and the support. It is provided at the end of the spring portion (72b) consists of a fixing portion (72c) screwed and connected to the pipe,
At least one water guide part 61 and the water guide part are provided in the bad part 60 to be concave inward from the outer surface of the bad part 60 to guide the flow of water sprayed from the water spray part 70. It is further provided with a nozzle 62 connected to one end of the 61 to receive the water flowing along the water guide portion 61,
The water guide portion 61 is composed of a main flow passage 61a connected in one direction, and a plurality of sub flow passages 61b vertically connected to the main flow passage 61a, and the main flow passage 61a is the bearing. 10 extending parallel to the cemented shank 100, the sub-channel 61b is connected to be inclined toward the lower side from the main channel 61a, and the end of the sub-channel 61b is connected to the nozzle. Bearing processing apparatus using a carbide shank electrode electrodeposited with diamond (62). The method of claim 1,
The air injection unit 80 is sprayed toward the bearing, but is provided at a position higher than the water injection unit 70,
The air injection unit 80 is connected to the spray unit 81 having a hole through which air is injected and the bellows unit 82 connected to the spray unit 81 so as to rotate the spray unit 81 up, down, left, and right. And a diamond shank electrodeposited shank having a nozzle portion 83 connected to the bellows portion 82 to supply air. The method of claim 1,
The cemented shank 200 is the body portion 210 is provided in the form of a round bar, the coating portion 220 is provided with a diamond is electrodeposited at one end of the body portion 210, and the other end of the body portion 210 Is provided with a screw groove portion 230 is formed concave in the form of a screw,
The cap groove 240 is inserted into the screw groove 230 is urethane,
The cap portion 240 is provided to accommodate the other end of the body portion 210, the screw thread 241 is provided on the inner circumference to screw the screw groove portion 230 provided on the other end, the cap portion 240 of Bearing processing apparatus using a cemented carbide shank electrode of the embossed form (242) having a plurality of projections on the outer surface. The method of claim 8,
An adhesive fixing part 230 is further provided between the end 211 of the body part 210 and the coating part 220 so that the coating part 220 is firmly attached to the outer surface of the body part 210. ,
The adhesion fixing portion 230 has a wavelength of 253.7 nm on the outer surface of the surface irregularities layer 231 and the surface irregularities layer 231 formed by sanding the outer surface of the end 211 of the body portion 210 with sandpaper. Made of a pretreatment layer 232 formed by irradiating ultraviolet light for 2 to 3 seconds,
Before the pretreatment layer 232 is provided, the cleaning agent and the electrostatic agent are applied to the surface irregularities layer 231 to clean the foreign substances of the surface irregularities layer 231 and prevent the dust from adhering to the surface irregularities layer 231. Further comprising spray spraying the inhibitor in a weight ratio of 95wt%: 5wt%,
The cleaning agent includes at least one solvent from the group consisting of lower alcohols such as methanol, ethanol and isopropyl alcohol, and the antistatic agent includes fatty acid esters, sorbitan fatty acid esters and alkyls of polyoxyethylene alkyl amines. Bearing processing apparatus using a cemented carbide shank electrode at least one type from the group consisting of phosphate. The method of claim 1,
The cemented shank 300 is the body portion 310 is provided in the form of a round bar, the coating portion 320 is provided with a diamond is electrodeposited at one end of the body portion 310, and the other end of the body portion 310 Including a fastening protrusion 330 protruding vertically outward,
The shaft 350 is provided at one end of the body portion 351 and the body portion 351 provided to rotate the cemented shank 300 shank insertion hole into which the other end of the cemented shank 300 is inserted ( Holder portion 352 having a 353 is connected,
An inner circumference of the holder part 352 is provided with a fastening groove 354 to which the fastening protrusion 330 is inserted and fixed inwardly.
The shank insertion hole 353 is horizontally connected vertically with respect to the vertical groove 354a at the end of the vertical groove 354a and the vertical groove 354a extending vertically at one end of the holder portion 352. A groove 354b,
The fastening protrusion 330 is formed of a protrusion 330a vertically protruding from the outer surface of the body portion 310 and a buffer portion 330b made of a urethane resin having elastic force at the end of the protrusion 330a.
The cemented shank 300 is inserted into the shank insertion hole 353, and the fastening protrusion 330 is inserted along the vertical groove 354a, and then the cemented shank 300 is rotated to fasten the fastening protrusion 330. Is fixed to the horizontal groove 354b,
The fastening protrusion 330 is provided with a speed sensor 330c to detect the rotational speed of the cemented shank 300, and transfer the detected speed to the controller to control the rotation of the shaft 350, the cemented carbide Bearing processing equipment using shank.

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