KR100858435B1 - Taper Roller Bearing Retainer Manufacturing System Provided with Retainer Holding Apparatus - Google Patents

Abstract

The present invention is a part of the line for manufacturing the retainer for supporting the roller of the tapered roller bearing as a part of the line for holding the retainer semifinished product for shearing the rectangular groove in which the roller is fitted with a side punching machine on the side wall of the retainer semifinished product, which is drawn in a cup shape. A retainer manufacturing apparatus for tapered roller bearings having a retainer holding device.

The retainer manufacturing apparatus 71 for a tapered roller bearing according to the present invention has a supply hopper 73 for supplying a retainer semifinished product, and a rectangular groove 163 into which a roller 77 is fitted on a side wall of the retainer semifinished product supplied from the hopper 73. Side punching machine (75) for shearing, chamfer (77) for chamfering the inner edge of the longitudinal edge (165) of the rectangular groove (163), and the retainer semi-finished product (151) In the retainer manufacturing apparatus (71) consisting of a bottom punching machine (79) for cutting and removing the bottom surface, the side punching machine (75) includes a head block (3) mounted at the tip and a center of the head block (3). A holding head 10 comprising a collet 5 coaxially inserted into the shaft hole 8 and a slider 7 coaxially inserted into the taper hole 11 of the collet 5 so as to be slidable. Including a retainer holding device (1) having a Characterized in that high.

Therefore, according to the retainer manufacturing apparatus provided with the holding device of the present invention, the retainer semi-finished product can be automatically gripped when the rectangular groove is machined on the side by the side punching machine or the chamfering of the rectangular groove is performed. In addition to this, it is possible to greatly improve the work stability.

Retainer, Roller Bearing, Gripper, Collet

Description

Taper Roller Bearing Retainer Manufacturing System Provided with Retainer Holding Apparatus}

The present invention relates to a retainer gripping apparatus for tapered roller bearings, and more particularly, to a roller for producing a retainer for supporting a roller of a tapered roller bearing, the roller having a side puncher on the side wall of the retainer semifinished product which has been drawn in a cup shape in advance. A retainer manufacturing apparatus for a tapered roller bearing having a retainer gripping device for gripping retainer semi-finished products in order to shear the rectangular groove into which the groove is inserted.

Generally, bearings can be roughly classified into sliding bearings, ball bearings, and roller bearings. Among these, roller bearings, which are widely used when the rotational speed is relatively low, the supporting load is large, and a strong impact is applied, are again used as cylindrical roller bearings, tapered roller bearings, needle bearings, spherical roller bearings, etc. Can be distinguished.

Here, the tapered roller bearing, like the other bearings, has a basic configuration of the inner race 153, outer race 155, roller 157, retainer 159, as shown by reference numeral 151 in FIG. In particular, the retainer 159 allows the roller 157 to be evenly disposed on the entire circumferential surface between the inner and outer races 153 and 155, thereby preventing contact between the rollers 157 to prevent the occurrence of wear or noise. It plays a role. Thus, as shown in FIG. 2, the retainer 159 has a plurality of rectangular grooves 163 rotatably fitted along the wall surface of the inclined annular body 161 having a conical shape. It is processed. In FIG. 2, reference numeral 167 illustrates a large diameter portion and 168 illustrates a small diameter portion.

In order to manufacture the retainer 159 configured as described above, a retainer manufacturing apparatus 101 for a tapered roller bearing shown in FIG. 3 has been proposed. The device 101 is a feed hopper 103 for supplying the cup-shaped retainer semifinished product, which is made large as shown, to the device 101, and the roller 157 is fitted to the side wall of the semi-finished product supplied from the hopper 103. Side punching machine 105 for shearing rectangular grooves 163, chamfer 107 chamfering the inner edge of the longitudinal rim 165 of the rectangular grooves 163, and chamfered cup shape The bottom surface punching machine 109 is formed by cutting the bottom surface of the semi-finished product 151.

Therefore, according to the tapered roller bearing retainer manufacturing apparatus 101 to manufacture the retainer 159 through the following process. First, the retainer semi-finished product, which has been previously drawn into a cup shape, is supplied to the apparatus 101 through the hopper 103. Semi-finished product discharged from the hopper 103 is conveyed toward the side punching machine 105 by the conveyor belt (110).

When the semi-finished product is transferred to the side punching machine 105, the worker places a plurality of rectangular grooves 163 into the side punching machine 105 in which the roller 157 is fitted to the side wall of the inclined main body 161 by biting the retainer semi-finished product one by one. By punching manually. Then, the semi-finished product is transferred to the chamfering machine 107 to remove the chamfered longitudinally inner end edge which may damage the roller 157 of the sharp longitudinal rim 165 of the rectangular groove 163. Finally, the semi-finished product transferred to the bottom punching machine 109 is cut and removed as a whole of the bottom part of the main body 161 by the punching machine 109, thereby forming a warp-shaped finished product.

In manufacturing the retainer through the above process, when the rectangular groove 163 is punched into the retainer semi-finished product, a manual side punching machine 105 has been used until now, so that the retainer semi-finished product is punched into the punching vise, and the side punching machine 105 is used. Since operations such as machining rectangular grooves by manual operation are performed by hand, there is a problem in that the machining accuracy is lowered, the defect rate is increased, the quality is degraded, and the productivity and work time are increased due to increased workmanship and process time.

The present invention has been proposed to solve the above problems occurring in the process of manufacturing a retainer for a conventional tapered roller bearing, a hopper to automate the side punching operation of processing a rectangular groove for fixing the roller to the side of the retainer semi-finished product The purpose is to fully automate the gripping operation of the retainer semifinished product transferred from the conveyor belt to the side punching machine and to firmly hold the retainer semifinished product.

Therefore, the present invention is a retainer manufacturing apparatus for achieving the above object is to shear the rectangular groove into which the roller is fitted to the side wall of the retainer semi-finished product supplied from the hopper and having a gripping portion, a support portion, and a gripping device composed of a moving portion A side puncher; A chamfering device for chamfering the inner edge of the longitudinal edge portion of the rectangular groove; And it is made of a bottom punching machine for cutting and removing the bottom surface of the retainer semi-finished product chamfered,

The gripping portion is mounted to the front end, the shaft block is formed, the head block is inserted into one side of the shaft hole is protruded and supported by an elastic body having a projection in contact with the retainer semi-finished product; At least one slit is formed in the longitudinal direction, a central shaft hole is formed, a portion of the inner circumferential surface of the central shaft hole is tapered to open forward, has a wedge protruding in the circumferential direction at the tip, the shaft hole of the head block A collet inserted into the; Inserted into the central shaft hole of the collet, the first half is tapered, the second half is characterized in that it comprises a gripping head consisting of a slider formed in a cylindrical shape to be able to slide along the cylindrical inner peripheral surface of the shaft hole.

On the other hand, the retainer manufacturing apparatus according to the present invention is a side punching machine for shearing a rectangular groove fitted with a roller on the side wall of the retainer semi-finished product supplied from the hopper; A chamfering device, which chamfers an inner edge of the longitudinal edge portion of the rectangular groove and has a gripping portion, a supporting portion, and a gripping device composed of a moving portion; And it is made of a bottom punching machine for cutting and removing the bottom surface of the retainer semi-finished product chamfered,

The gripping portion is mounted to the front end, the shaft block is formed, the head block is inserted into one side of the shaft hole is protruded and supported by an elastic body having a projection in contact with the retainer semi-finished product; At least one slit is formed in the longitudinal direction, a central shaft hole is formed, a portion of the inner circumferential surface of the central shaft hole is tapered to open forward, has a wedge protruding in the circumferential direction at the tip, the shaft hole of the head block A collet inserted into the; Inserted into the central shaft hole of the collet, the first half is tapered, the second half is characterized in that it comprises a gripping head consisting of a slider formed in a cylindrical shape to be able to slide along the cylindrical inner peripheral surface of the shaft hole.

In the above, characterized in that the inclined surface is formed on the edge connected to the wedge of the collet.

In the above description, a portion of the tapered portion of the inner circumferential surface of the central shaft hole of the collet is opened at an inclination angle of 5 °.

In the above, the slider is characterized in that the first half is tapered at the same inclination angle as the inner peripheral surface of the tapered hole.

In the above, the gripping portion further comprises a body which is fixed to the support portion, the electric motor mounted on the rear end of the body and the NC servo motor for intermittently rotating the gripping head at a set angle by an intermittent rotational force; The gripping head is characterized in that mounted to the front end of the body.

As described above, according to the retainer gripping apparatus of the retainer manufacturing apparatus for tapered roller bearings of the present invention, the hopper is used to process a rectangular groove for mounting a bearing roller on the side surface of the semifinished retainer or to chamfer the edge of the machined rectangular groove. When the retainer semi-finished product is transported on the conveyor belt, the retainer semi-finished product can be firmly gripped automatically without borrowing the operator's hand, so that the groove processing or the chamfer punching operation by the side punching machine can be performed quickly and safely. And, since the retainer semi-finished product is seated on the tapered surface of the wedge 15 having a triangular shape, it is possible to accurately seat the retainer semi-finished product, so that the side rectangular groove can be formed at an accurate angle.

Therefore, not only the work efficiency of the entire retainer manufacturing operation is improved, but the quality of the retainer is improved, and a pleasant working environment is created without having to worry about safety accidents during manual operation.

Hereinafter, a retainer manufacturing apparatus for a tapered roller bearing provided with a retainer gripping apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The retainer manufacturing apparatus for tapered roller bearings of the present invention is a retainer semifinished product supply hopper 73, side punching machine 75, chamfering machine 77, and bottom, similar to the general retainer manufacturing apparatus for tapered roller bearings shown at 71 in FIG. Consists of a cotton punching machine (79), the hopper (73) feeds the manufactured retainer semifinished product to the retainer manufacturing apparatus (71), the side punching machine (75) on the side wall of the retainer semifinished product supplied from the hopper (73) The rectangular groove 163 into which the bearing roller 157 shown in Fig. 3 is fitted is sheared. In addition, the chamfer 77 is to chamfer the inner edge of the longitudinal edge 165 of the rectangular groove 163, the bottom punching machine 79 is to cut the bottom surface of the retainer semi-finished product 151 chamfered Remove

In particular, the side punching machine 75 of the retainer manufacturing apparatus 71 of the present invention includes a retainer gripping device indicated by reference numeral 1 in FIGS. 5 to 7, and the gripping device 1 is a gripping device for largely holding a retainer semi-finished product. It consists of the support part 30 which supports the branch part 20, the holding part 20 so that forward and backward movement, and the conveyance part 50 which moves back and forth of the support part 30. As shown in FIG.

Here, the support part 30 is comprised from the support frame 31 extended longitudinally up and down, and the lifting cylinder 33 attached to the upper end of the support frame 31. As shown in FIG. Here, the support frame 31 is slidably mounted on the transfer rail 57 of the support frame 31 by a transfer block 35 mounted at four corners of the bottom surface.

In addition, the transfer unit 50 is configured to include a base frame 52, the transfer bed 53, the reciprocating cylinder 55, the transfer bed 53 is in the form of a flat plate extending long before and after, the support portion on the upper surface The feed rail 57 which guides the 30 in the front-back direction is provided. In addition, the reciprocating cylinder 55 mounted at one end of the transfer bed 53 is connected to the lower end side of the support portion 30 so that the rod 58 moves forward and backward along the transfer rail 57. have.

The gripping portion 20 is a portion for directly holding a retainer semi-finished product for a tapered roller bearing, the body 21 fixed to the support 30, the gripping head 10 mounted at the front end of the body 21, and a rear end of the body. It is configured to include a mounted electric motor 23, and the NC servo motor 25. Here, the gripping portion 20 body 21 is fixed to move together in the support frame 31, the inner electric rod 26 and the outer side connecting the gripping head 10 and the power bundle 23 therein The electric pipe 27 is provided coaxially. In addition, the electric power bundle 23 mounted at the rear end of the inner electric rod 26 is connected to the NC servo motor 25 through the electric belt 29. Therefore, by the intermittent rotational force of the NC servo motor 25 transmitted to the body 21 through the electric power bundle 23, the holding head 10 mounted on the front end of the body 21 is intermittently rotated at a set angle. do. Accordingly, the retainer semi-finished product bitten by the holding head 10 is also rotated at a predetermined angle, and a rectangular groove is formed in the side wall by a side puncher.

In particular, the gripping head 10, which is adapted to grip the retainer semi-finished product at the tip of the gripping portion 20, includes a headblock 3, a collet 5, and a slider 7, as shown in more detail in FIG. 8. It is configured by. Here, the head block 3 has a two-stage cylindrical shape whose front outer diameter is reduced, and two-stage cylindrical shaft holes 8 and 9 whose inner diameters of the back are enlarged are coaxially penetrated on the central axis. . And an alignment pin (4) is protruded on one side of the shaft hole (8) of the front, this alignment pin (4) is mounted by the fixing key (6), the opposite side of the alignment pin (4) is in contact with the retainer semi-finished part The protrusion 18 protruding to the outside is inserted. As shown in FIG. 8, the protrusion 18 is inserted into a concave portion formed at one side of the shaft hole 8 of the head block 3 so that a part thereof protrudes from the head block 3, and the elastic body 31 is provided on the opposite side of the protrusion 18. Supported by). As described above, the protrusion 18 is installed in the concave portion and is supported by the elastic body 31 at one side to be slidably moved (moving from side to side in FIG. 8) under external force, and restored by the elastic body 31 when the external force is removed. Part of it protrudes again.

The collet 5, which is coaxially inserted into the central shaft hole 8 of the head block 3, consists of a head 12 at the rear and a body 14 at the front, as shown in FIGS. 8 and 9. 12 is inserted into the rear large diameter shaft hole 9 of the head block 3 to be in contact with the shoulder surface 16 between the shaft hole 9 and the shaft hole 8, the rear side of the electric pipe (27) It is connected. The body 14 inserted into the front small diameter shaft hole 8 of the head block 3 has a hollow cylindrical shape, one or more preferably four slits 13 in the circumferential wall extending from the middle to the tip of the circumferential wall. It is formed in the direction. The body 14 of the collet 5 is also tapered so that the inner circumferential surface of the central shaft hole 11 into which the slider 7 is inserted is inclined at an angle of, for example, 5 ° with respect to the horizontal line from the middle.

Meanwhile, as shown in FIGS. 8 and 9, a wedge 15 having a triangular cross section protrudes in the circumferential direction at the front end of the body 14 of the collet 5. The hook retains the edge of the gripper 61 of the retainer semi-finished product 51 and pulls the retainer semi-finished product 51 to closely adhere to the front surface of the head block 3. In addition, the inclined surface 17 is formed at the leading edge of the wedge 15 and the body 14 connected to each other, thereby guiding the edge of the grip hole 61 of the retainer semi-finished product 51 to be pushed upward. do.

Finally, the slider 7 inserted into the tapered shaft hole 11 of the body 14 so that the slit 13 presses the body 14 of the processed collet 5 radially outward is an inner circumferential surface of the shaft hole 11. The first half 19 is tapered at the same angle as the inner circumferential surface of the shaft hole 11, for example, at an inclination angle of 5 °, while the second half is cylindrical to slide along the cylindrical inner circumferential surface of the shaft hole 11. The transmission rod 26 is screwed inside the end part.

Now, the operation of the retainer holding device according to an embodiment of the present invention configured as described above will be described.

In order to grip the retainer semifinished product 51 by the holding device 1 of the present invention, first, as shown in FIG. 10, the retainer semifinished product 51 is transferred to a front of the grip head 10 by a separate transfer device. Align with the gripping head 10 on the same axis.

In this state, when the holding head 10 approaches the retainer semifinished product 51 and reaches the point marked A, the inclined surface 17 of the collet 5 comes into contact with the edge of the grip hole 61 of the retainer semifinished product 51. . However, as shown in FIG. 10, the slider 7 is deeply inserted into the collet 5 so that the inner and outer peripheral tapered surfaces of the collet 5 shaft hole 11 and the slider 7 front half 19 are in close contact with each other. The body of the collet 5 body 14 is pushed outward by the slider 7 so that it is not elastic in the radial direction.

Therefore, the slider 14 first moves forward, i.e., to the right in the drawing, as shown in FIG. 11 to generate a gap between the outer circumferential surface of the body 14 and the collet 5 shaft hole 11. After being elastic in the radial direction, the grip head 10 moves toward the retainer semifinished product 51 so that the edge of the grip hole 61 rides over the wedge 15 and is shown as a hidden line in FIG. 5) Insert the retainer semifinished product 51 upwards. At this time, the protrusion 18 contacts the retainer semifinished product 51 before the head block 3 so as to mitigate the impact applied to the retainer semifinished product 51 from the head block 3. In addition, the alignment pin 4 is inserted into the alignment hole 63 of the retainer semifinished product 51, so that the alignment state of the retainer semifinished product 51 can be confirmed.

Then, the collet 5 is retracted by the electric pipe 27 so that the root portion of the wedge 15 is caught by the inner edge of the retainer semifinished product 51 gripping hole 61 as shown in FIG.

In this state, when the slider 7 is pulled by the electric rod 26, the slider 7 has a shaft hole 11 until the tapered outer circumferential surface comes into close contact with the tapered inner circumferential surface of the collet 5 shaft hole 11. Slide along). Immediately after, the inner and outer peripheral tapered surfaces of the collet 5 and the slider 7 are in close contact with each other.

If the slider 7 continues to retreat, the collet 5 in close contact with the slider 7 is also moved backwards, and the body 14 of the collet 5 is likewise radially driven by the slider 7. Since it is strongly pressed outward, it will not have elasticity at all in the radial direction. Therefore, as shown in FIG. 13, the inner edge of the gripping hole 61 of the retainer semifinished product 51 is pulled backwards by the wedge 15 so that the retainer semifinished product 51 is held in close contact with the gripping head 10. Done.

When the retainer semifinished product 51 is gripped as shown in FIG. 13, the retainer semifinished product 51 is in contact with the head block 3 in the axial direction (left and right directions in FIG. 13) and by the wedge 15 on the opposite side. On the other hand, because the elastic force is received by the protrusion 18, the retainer semi-finished product 51 is firmly gripped in the axial direction and no shaking occurs.

And in the radial direction (up and down in Fig. 13) the collet 5 is extended by the slider 7 to be in close contact with the gripping hole 61, the collet 5 is supported by the slider 7 from the inside, so the rectangular groove Radial displacement can be minimized even when an external force is applied when forming or chamfering 163.

Although the gripping apparatus 1 has been described as being provided in the side punching machine 75, the gripping apparatus 1 may be applied to the chamfering machine 77 as well as the side punching machine 75. And in the description of the present invention with reference to the drawings, the scope of protection of the present invention is not limited to this, should be extended to the range that can be easily modified by those of ordinary skill in the art. will be.

1 is a longitudinal sectional view of a typical tapered roller bearing.

FIG. 2 is a perspective view of the retainer for the tapered roller bearing shown in FIG. 1. FIG.

3 is a block diagram schematically showing a conventional manufacturing apparatus for producing the retainer for the tapered roller bearing shown in FIG.

Figure 4 is a block diagram schematically showing a retainer manufacturing apparatus for a tapered roller bearing having a retainer holding device according to the present invention.

5 is a front view of the retainer gripping apparatus according to the present invention.

6 is a plan view of FIG. 5.

7 is a side view of FIG. 5.

8 is a detailed front cross-sectional view of the gripping head shown in FIGS. 5 and 6.

9 is a longitudinal cross-sectional view of the collet shown in FIG. 8.

FIG. 10 is a detailed sectional view of the holding head, illustrating a process of holding the retainer semi-finished product on the holding head. FIG.

Fig. 11 is a detailed sectional view of the holding head, showing a state where the retainer semifinished product is first inserted into the collet of the holding head.

12 is a detailed front sectional view of the gripping head, showing a collet of the gripping head retracted backward to grip the retainer semifinished product.

Fig. 13 is a detailed sectional view of the gripping head, showing a state in which the slider of the gripping head is retracted and the retainer semi-finished product is held in close contact with the gripping head by a collet.

Explanation of symbols on the main parts of the drawings

1: Retainer Holding Device 3: Head Block

5: collet 7: slider

10: grip head 13: slit

15: wedge 20: gripping portion

30: support part 50: transfer part

51: semi-finished retainer 61: gripping ball

Claims (6)

A gripping apparatus composed of a gripping portion 20, a supporting portion 30, and a moving portion 50 by shearing a rectangular groove 163 into which a roller 77 is fitted on a side wall of a retainer semifinished product supplied from a hopper 73. A side puncher (75) having (1); A chamfer 77 for chamfering the inner edge of the longitudinal edge 165 of the rectangular groove 163; And in the retainer manufacturing apparatus 71 consisting of a bottom punching machine 79 for cutting and removing the bottom surface of the retainer semi-finished product 151 chamfered, The gripping portion 20 is mounted to the front end, the shaft hole (8) is formed, one side of the shaft hole (8) is inserted into a portion protrudes and has a head (18) supported by the elastic body 31 Block 3; At least one slit 13 is formed in the longitudinal direction, the central shaft hole 11 is formed, a portion of the inner circumferential surface of the central shaft hole 11 is tapered so as to open forward, protruding in the circumferential direction at the tip A collet (5) having a wedge (15) and inserted into the shaft hole (8) of the head block (3); The gripper is inserted into the central shaft hole 11 of the collet 5, the first portion 19 is tapered, the rear portion is formed of a slider (7) formed in a cylindrical shape so as to slide along the cylindrical inner peripheral surface of the shaft hole (11) Retainer manufacturing apparatus for a tapered roller bearing, characterized in that comprising a head (10). A side punching machine (75) for shearing the rectangular groove (163) into which the roller (77) is fitted on the sidewall of the retainer semifinished product supplied from the hopper (73); A chamfer 77 which chamfers the inner edge of the longitudinal edge 165 of the rectangular groove 163 and has a gripping portion, a supporting portion, and a gripping apparatus 1 composed of a moving portion; And in the retainer manufacturing apparatus 71 consisting of a bottom punching machine 79 for cutting and removing the bottom surface of the retainer semi-finished product 151 chamfered, The gripping portion is mounted to the front end, the shaft hole is formed, is inserted into one side of the shaft hole protruding and has a head block having a projection supported by an elastic body; At least one slit is formed in the longitudinal direction, a central shaft hole is formed, a portion of the inner circumferential surface of the central shaft hole is tapered to open forward, has a wedge protruding in the circumferential direction at the tip, the shaft hole of the head block A collet inserted into the; Inserted into the central shaft hole of the collet, the first half is tapered, the second half is a retainer for a tapered roller bearing, characterized in that it comprises a gripping head consisting of a slider formed in a cylindrical shape to be able to slide along the cylindrical inner peripheral surface of the shaft hole Manufacturing equipment. The retainer manufacturing apparatus for a tapered roller bearing according to claim 1 or 2, wherein an inclined surface is formed at an edge connected to the wedge of the collet. The retainer manufacturing apparatus for a tapered roller bearing according to claim 1 or 2, wherein a part of the tapered portion of the inner circumferential surface of the central shaft hole of the collet is opened at an inclination angle of 5 degrees. The retainer manufacturing apparatus for a tapered roller bearing according to claim 1 or 2, wherein the first half of the slider is tapered at the same inclination angle as the inner circumferential surface of the tapered hole. According to claim 1 or claim 2, wherein the gripping portion further comprises a NC servo motor for intermittently rotating the gripping head at a set angle by the body fixed to the support, the electric bundle mounted on the rear end of the body and the intermittent rotational force. Is configured; The holding head is a retainer manufacturing apparatus for a tapered roller bearing, characterized in that mounted to the front end of the body.

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