JP2021112806A - Polishing jig and polishing method - Google Patents

Abstract

To provide a polishing jig and a polishing method that form an inclined surface common to a plurality of components.SOLUTION: A polishing jig is fixed to a polishing device according to the actual arrangement when a plurality of components are attached to an actual machine, and its fixing surface has an inclination surface at a predetermined angle where the plurality of components are inclined in a direction in which they are separate. For example, the plurality of components are fixed to the actual machine by attachment means. Then, at the time of polishing, the polishing jig is fixed in a state of being inclined at the predetermined angle in the direction where the plurality of components are separate according to the actual arrangement when the plurality of components are attached to the actual machine, and then the plurality of components in the inclined state are simultaneously subjected to planar polishing of an upper surface side.SELECTED DRAWING: Figure 5

Description

The present invention relates to a polishing jig and a polishing method for polishing a plurality of component surfaces at a certain angle of inclination.

Regarding the polishing of parts, for example, Patent Document 1 below discloses an invention relating to polishing of a glass material for a prism. Here, a prism polishing jig is used for polishing a prism glass material having a substantially triangular prism. The prism polishing jig has a sticking block having an inclined surface (sticking reference plane) on a smooth base-side reference plane, and is configured to be detachably attached to the base by screws. In particular, the sticking block is formed with two orthogonal screw holes, and the position of the inclined surface (angle with respect to the reference surface) can be changed to two states by changing the screw holes and attaching the block to the base.

In producing the prism, the raw material block body of the prism glass material is cut out into a substantially triangular columnar shape, and initial processing is performed so that the shape and dimensions are suitable for polishing processing. Then, after the bottom surface, which is the first surface of the prism glass material, is polished, the prism glass material is attached to the inclined surface whose angle is changed by replacing the attachment block, and the second surface and the third surface are polished. Is done.

Japanese Unexamined Patent Publication No. 09-047950

In the polishing operation, an inclined surface is formed by polishing the surface of the component at a constant angle as described above. However, the conventional polishing is to polish a predetermined surface of one part at a predetermined angle, and there is no such thing as polishing the inclined surfaces of a plurality of parts such as two parts by aligning the angles with each other. Therefore, until now, polishing with an angle set for each part has been performed, but it is difficult to form a common inclined surface with the same angle for a plurality of parts by polishing performed separately, and it is skillful. Technology was needed. When a plurality of parts with low tilt angle accuracy are incorporated into an actual machine, wear and backlash increase, leading to a reduction in the life of the parts.

Therefore, an object of the present invention is to provide a polishing jig and a polishing method for forming a common inclined surface in a plurality of parts in order to solve such a problem.

The polishing jig according to one aspect of the present invention fixes a plurality of parts to a polishing device according to an actual arrangement at the time of assembling to an actual machine, and the fixing surface thereof is inclined in a distant direction of the plurality of parts. It is an inclined surface with a predetermined angle.

In the polishing method according to another aspect of the present invention, a plurality of parts are fixed in a state of being tilted at a predetermined angle in a distant direction according to an actual arrangement at the time of assembling to an actual machine, and the tilted state is described. The upper surface side is surface-polished for a plurality of parts.

According to the above configuration, since the plurality of parts are fixed in a state of being inclined at a predetermined angle according to the actual machine according to the arrangement actually assembled in the actual machine, the upper surface side is surface-polished to the plurality of parts. A common inclined surface can be easily formed.

It is a side view which showed the main structure of a turret lathe. It is a perspective view which showed the drive device of the turret device. It is a side view which showed the driving part of the turret device. It is an enlarged view of the front bearing. It is a figure which showed the processing state by a flat surface polishing apparatus. It is a figure which showed the mounting state after processing of a front block and a rear block.

An embodiment of a polishing jig and a polishing method according to the present invention will be described below with reference to the drawings. The polishing jig and polishing method of the present embodiment simultaneously form a common inclined surface for a plurality of parts located at distant locations. In the present embodiment, a bearing for supporting a slide member will be described as an example in a drive device constituting a machine tool, particularly a turret lathe. Therefore, FIG. 1 is a side view showing the main configuration of the turret lathe.

The turret lathe 1 is a lathe in which the turret device 3 is moved in the machining axis direction with respect to the spindle device 2 provided with a chuck having a rotation axis in the horizontal direction. Here, the direction parallel to the rotation axis of the spindle device 2 is the Z axis. The turret lathe 1 is a biaxial lathe in which a turret device 3 equipped with a tool moves with its Z-axis direction and a vertical X-axis direction orthogonal to the Z-axis as a machining axis. Therefore, in the turret lathe 1, a Z-axis drive device 5 for driving the Z-axis slide 22 and an X-axis drive device 6 for moving the Z-axis drive device 5 in the X-axis direction are provided in the column 11. FIG. 2 is a perspective view showing a driving device of the turret device.

In the turret lathe 1, the spindle device 2 is fixed to the base 7 (see FIG. 1), and the column 11 is erected next to the spindle device 2. In the X-axis drive device 6, two guide rails 12 are fixed to the column 11 in the vertical direction, and the X-axis slide 13 is movably assembled to the guide rails 12. Further, an X-axis servomotor 14 is fixed to the upper part of the column 11, and its rotation is transmitted to the ball screw mechanism via the timing belt 16. Therefore, in the X-axis drive device 6, the screw shaft 15 is rotated by the output of the X-axis servomotor 14, the rotational motion is converted into the linear motion of the nut, and the X-axis slide 13 is in the vertical direction which is the X-axis direction. It is designed to go up and down.

In the Z-axis drive device 5, the Z-axis guide 21 is fixed to the X-axis slide 13, and the Z-axis slide 22 is movably fitted to the Z-axis guide 21. A support frame 23 is also integrally assembled to the X-axis slide 13, a Z-axis servomotor 24 is fixed thereto, and the rotation thereof is transmitted to the screw shaft 25 via a timing belt. Therefore, the output of the Z-axis servomotor 24 rotates the screw shaft 25, the rotational movement of the screw shaft 25 is converted into a linear motion of the nut, and the Z-axis slide 22 moves in the horizontal direction, which is the Z-axis direction. .. A turret device 3 for rotating and indexing the tool is assembled to the end 221 of the Z-axis slide 22.

In such work processing in the turret lathe 1, the spindle motor is driven in the spindle device 2, and the rotational output thereof is transmitted to the spindle to give rotation to the work W gripped by the spindle chuck 201. In the turret device 3, swivel indexing is performed according to the machining content, and a predetermined machining tool is selected from a plurality of tools. Then, the machining tool is driven by the Z-axis drive device 5 and the X-axis drive device 6 to move in the Z-axis and the X-axis in the machining axis direction, and is applied to the rotating work W to perform predetermined machining.

Since the turret lathe 1 is required to have machining accuracy on the order of microns, high precision is also required for the moving position of the machining tool by drive control. Under such circumstances, the turret lathe 1 as in the present embodiment has a problem in that the Z-axis slide 22 is moved stably in order to improve the accuracy of the moving position of the turret device 3. In the turret lathe 1 as in the present embodiment, the Z-axis slide 22 holding the turret device 3 at the end has a cantilever support structure. Therefore, as shown in FIG. 3, the moment load acting on the Z-axis slide 22 changes while the turret device 3 moves between the solid line and the alternate long and short dash line.

Since the Z-axis drive device 5 needs to prevent the change in the high position of the turret device 3, that is, the machining tool from affecting the machining with the change in the moment load, the end portion 221 side of the Z-axis slide 22 becomes higher. It is assembled in a slightly inclined posture. The Z-axis guide 21 for supporting such a Z-axis slide 22 is provided with front bearings 31F and 32F and rear bearings 31R and 32R that sandwich the upper and lower parts at two positions in the Z-axis direction. In the front bearings 31F and 32F and the rear bearings 31R and 32R, as shown in FIG. 4, the flat roller 35 is fixed to the assembly block 36, and the Z-axis slide 22 supported by the flat roller 35 is Z. It is configured to smoothly move linearly in the axial direction.

In order to make the Z-axis slide 22 in an inclined posture, the flat roller 35 of the front bearing 31F has been configured to be higher than the rear bearing 31R. Specifically, the lower front bearing 31F is adjusted in height by inserting a wedge into the block 36 for fixing the flat roller 35, and the upper rear bearing 32R is also adjusted in height in the same manner. The Z-axis slide 22 was tilted. However, the flat roller 35 whose height is adjusted while maintaining the horizontal posture is tilted in the front bearing 31F and the rear bearing 31R because the heights of the plurality of needles 351 arranged in the Z-axis direction are the same. The Z-axis slide 22 hits only a part of the needles 351 and shortens the service life.

Therefore, in the present embodiment, the plurality of needles 351 constituting the flat roller 35 are all configured to hit the tilted Z-axis slide 22. To do this, the upper surface (mounting surface) 361 of the block 36 is tilted, and when the flat roller 35 is mounted on the actual turret lathe 1, a plurality of needles 351 arranged in the Z-axis direction tilt the Z-axis slide 22. It is configured to be matched. In the present embodiment, the inclination θs of the Z-axis slide 22 is about 1 degree, and the inclination θs of the mounting surface 361 of the block 36 is formed so as to be aligned with the inclination.

By the way, the Z-axis guide 21 supports the Z-axis slide 22 at two front and rear positions of the front bearings 31F and 32F and the rear bearings 31R and 32R. Therefore, the machined surface 363 of the block 36 of the front bearing 31F and the rear bearing 31R (front block 36F and rear block 36R (see FIGS. 5 and 6)) needs to be polished in consideration of the distance between the mounting positions. Yes (the same applies to the front bearing 32F and the rear bearing 32R). In such a case, if the method of polishing for each block 36 is used, the height and inclination are likely to vary, and skill is required for highly accurate polishing, and the processing time is required to improve the accuracy. It costs money and goes up. Therefore, in order to solve such a problem, in order to polish a part at a distant position with a constant inclination, the following polishing jig and a polishing method using the jig are proposed.

The polishing jig 37 of the present embodiment can be fixed according to the actual assembly of the Z-axis guide 21. That is, they are fixed to the front block 36F and the rear block 36R according to the distance L (see FIG. 2), which is the distance between the front bearings 31F and 32F and the rear bearings 31R and 32R, and are flat as shown in FIG. It is fixed on the table 51 of the polishing device 50. At that time, the front block 36F and the rear block 36R are fixed to the polishing jig 37 by bolt tightening, which is the same assembling means as when assembling to the Z-axis guide 21. Further, the polishing jig 37 is formed so that the fixed surface 371 is inclined according to the inclination θs (about 1 degree) of the Z-axis slide 22. In the drawing, the inclination θs is expressed so that the inclination angle of the fixed surface 371 can be easily understood.

The front block 36F and the rear block 36R are plate-shaped rectangular parallelepipeds having a small thickness dimension, and both the upper surface and the lower surface located in the vertical direction of the drawing are parallel. By fixing the front block 36F and the rear block 36R to the polishing jig 37, the inclination of the surface to be polished (upper surface) coincides with the angle of the fixed surface 371, that is, the inclination θs of the Z-axis slide 22. It will be. Then, the front block 36F and the rear block 36R are mounted at a distance L equal to the mounting interval of the Z-axis guide 21.

The flat surface polishing device 50 is provided with a polishing head 55 for rotating the polishing surface plate 52 on a table 51 that holds the work 1. The polishing head 55 has an elevating device 56 capable of adjusting the polishing surface plate 52 in the height direction, and is incorporated in a driving device (not shown) so as to move on a horizontal plane. At the time of processing, the rotating polishing surface plate 52 is applied to the front block 36F and the rear block 36R, and the respective processed surfaces 363 are polished. At that time, both the processed surfaces 363 of the front block 36F and the rear block 36R are finished at the same time according to the common horizontal processing line C shown by the alternate long and short dash line in FIG. In such horizontal polishing, since the front block 36F and the rear block 36R are tilted, the amount of polishing of the upper part of the processing line C indicated by hatching is different.

The front block 36F and the rear block 36R, which have been subjected to surface polishing, have both machined surfaces 363 as a common flat surface, and both non-machined surfaces 365 located on opposite sides have a common inclined surface according to the fixed surface 371. It becomes. Therefore, the front block 36F and the rear block 36R are attached to the front bearing 31F and the rear bearing 31R of the Z-axis guide 21, but at that time, they are turned upside down and have a common flat surface as shown in FIG. The surface 363 is on the lower side and the unprocessed surface 365 is on the upper side and is bolted. That is, the unprocessed surface 365 becomes the mounting surface 361 in contact with the flat roller 35 shown in FIG. Then, the front bearing 32F and the rear bearing 32R are also polished in the same manner for the pair of blocks 36, and each of them is fixed by bolting.

The Z-axis guide 21 can be assembled by tilting the Z-axis slide 22 at a predetermined angle by fixing the flat rollers 35 to the front block 36F and the rear block 36R, respectively. Then, on the Z-axis slide 22 that moves in the Z-axis guide 21 in an inclined posture, a plurality of needles 351 of the flat rollers 35 arranged in the Z-axis direction in the front bearings 31F and 32F and the rear bearings 31R and 32R are arranged. I'm hit. Therefore, in the turret lathe 1, the movement of the Z-axis slide 22 is stable, the accuracy of the moving position of the turret device 3, that is, the machining tool is improved, and the life of the front bearings 31F and 32F and the rear bearings 31R and 32R is extended.

The front block 36F and the rear block 36R of the front bearing 31F and the rear bearing 31R (the same applies to the block 36 of the front bearing 32F and the rear bearing 32R) are common to the front block 36F and the rear bearing 31R by a polishing method using a polishing jig 37. The inclined surface can be easily formed in a short time. Further, since the conventional surface polishing apparatus 50 can be used as it is, it can be formed without incurring a cost. In particular, since it can be formed by performing ordinary surface polishing on the front block 36F and the rear block 36R attached to the polishing jig 37, no skill is required.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the bearing blocks provided at two locations have been described, but it is possible to handle polishing of two or more parts arranged at a distance.
Further, it can be used in other than the type of polishing apparatus shown in the above embodiment.

1 ... Turret lathe 3 ... Turret device 5 ... Z-axis drive device 21 ... Z-axis guide 22 ... Z-axis slide 31F, 32F ... Front bearing 31R, 32R ... Rear bearing 35 ... Flat roller 36 ... Block 36F ... Front block 36R ... Rear block 37 ... Polishing jig 50 ... Flat surface polishing device 52 ... Polishing platen 351 ... Needle 363 ... Machining surface 371 ... Fixed surface C ... Machining line

Claims (3)

A polishing jig that fixes a plurality of parts to a polishing device according to an actual arrangement at the time of assembling to an actual machine, and the fixing surface is an inclined surface having a predetermined angle inclined in a direction in which the plurality of parts are separated. The polishing jig according to claim 1, wherein the plurality of parts are fixed by an assembling means at the time of assembling to an actual machine. According to the actual arrangement at the time of assembling the plurality of parts to the actual machine, the plurality of parts are fixed in a state of being tilted at a predetermined angle in a distant direction, and the upper surface side is simultaneously flattened with respect to the plurality of the tilted parts. Polishing method to polish.

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