CN112805118B

CN112805118B - Machining tool and roll finishing device

Info

Publication number: CN112805118B
Application number: CN201880098187.XA
Authority: CN
Inventors: 桧田政明; 朴木继雄; 平野哲也
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2018-10-05
Filing date: 2018-10-05
Publication date: 2023-05-02
Anticipated expiration: 2038-10-05
Also published as: CZ2021120A3; CN112805118A; JPWO2020070893A1; JP7004839B2; WO2020070893A1; CZ309326B6

Abstract

The present invention relates to a processing tool for holding a polishing shaft of a polishing device for polishing an inner surface of a groove formed from an inner peripheral surface of a cylindrical workpiece toward an outer side. The machining tool includes a support portion that doubly supports both ends of the polishing shaft so as not to fix both ends of the polishing shaft.

Description

Machining tool and roll finishing device

Technical Field

The present invention relates to a processing tool and a polishing device used for a polishing device that polishes an inner surface of a groove formed from an inner peripheral surface of a cylindrical body toward an outer side.

Background

In general, a cylinder of a rotary compressor is formed in a cylindrical shape having a through hole in a central portion, and a vane mounting groove extending radially from an inner peripheral surface is formed in the cylinder. The vane is slidably disposed in the vane mounting groove, and reciprocates in the vane mounting groove while being in contact with an outer surface of an eccentric ring disposed in a through hole of the cylinder. In a rotary compressor including such a cylinder block and a vane, in order to improve the slidability of the vane, a high efficiency compressor is obtained, and extremely high machining accuracy such as surface roughness, flatness, parallelism, and groove width is required for machining the inner side surface of the vane mounting groove.

As a finishing device for the inner side surface of such a blade attachment groove, there is a device of patent document 1, for example. Patent document 1 discloses a polishing device including a polishing shaft having a diameter larger than the width of a blade attachment groove. Patent document 1 discloses a machining tool for holding a roll finishing shaft by cantilever fixation. Further, by moving the working tool, the inner side surface of the blade mounting groove is slightly plastically deformed by reciprocating the shaft for polishing while pressing the shaft against the inner side surface of the blade mounting groove, and polishing for improving the convex portion of the inner side surface of the blade mounting groove is performed.

Patent document 1: japanese patent application laid-open No. 2015-226971

In the polishing device of patent document 1, as described above, the polishing shaft is fixed to the processing tool by a cantilever. Therefore, there is a possibility that the axis for polishing is bent and the center line of the blade attachment groove is displaced from the center axis of the axis for polishing at the time of processing. In this state, when the roll finishing shaft enters the blade mounting groove, the roll finishing shaft is strongly pressed against one inner surface of the blade mounting groove because the roll finishing shaft does not have a function in which the center axis of the roll finishing shaft is driven from the center line of the blade mounting groove. Therefore, uneven wear occurs on the surface of the polishing shaft, which results in a reduction in tool life.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a machining tool and a polishing device capable of suppressing uneven wear of a polishing shaft and improving the tool life when polishing an inner surface of a groove formed outward from an inner peripheral surface of a cylindrical workpiece.

The present invention relates to a machining tool for holding a polishing shaft used in a polishing device for polishing an inner surface of a groove formed outward from an inner peripheral surface of a cylindrical workpiece, the machining tool including a support portion for supporting both ends of the polishing shaft so as not to fix both ends of the polishing shaft.

According to the processing tool of the present invention, since the polishing shaft is configured to have a double-support structure, the polishing shaft can be prevented from being greatly deflected during processing. Therefore, partial uneven wear of the surface of the polishing shaft can be prevented, and the tool life can be improved.

Drawings

Fig. 1 is a schematic configuration diagram of a roll finishing device according to embodiment 1 of the present invention.

Fig. 2 is a schematic perspective view showing a state in which a cylindrical workpiece is mounted on a workpiece holding device of a roll finishing device according to embodiment 1 of the present invention.

Fig. 3 is a perspective view of a cylindrical workpiece processed by the roll finishing device according to embodiment 1 of the present invention.

Fig. 4 is a schematic cross-sectional view of a working tool of the roll finishing device according to embodiment 1 of the present invention.

Fig. 5 is a schematic perspective view of a working tool of the roll finishing device according to embodiment 1 of the present invention.

Fig. 6 is a schematic cross-sectional view showing a dimensional relationship of a working tool of the roll finishing device according to embodiment 1 of the present invention.

Fig. 7 is a plan view showing a dimensional relationship of a cylindrical workpiece processed by the roll finishing device according to embodiment 1 of the present invention.

Fig. 8 is a schematic perspective view showing a main part of a roll finishing device before roll finishing of a cylindrical workpiece machined by the roll finishing device according to embodiment 1 of the present invention.

Fig. 9 is a schematic plan view showing the relationship between a roll finishing shaft and a blade attachment groove in the process of machining a cylindrical workpiece by the roll finishing device according to embodiment 1 of the present invention.

Fig. 10 is a diagram showing a relationship between the radial position and the surface flatness of the blade attachment groove before and after the machining using the roll finishing device according to embodiment 1 of the present invention.

Fig. 11 is a diagram showing the shape of the shaft surface after machining at 153.6 m/root using a conventional cantilever-fixed machining tool.

Fig. 12 is a diagram showing the shape of the shaft surface after machining at 2304 m/root using the two-end support type machining tool according to embodiment 1 of the present invention.

Fig. 13 is a diagram showing the difference in surface pressure caused by the presence or absence of uneven wear on the surface of the polishing shaft.

Fig. 14 is a schematic cross-sectional view of a working tool of a roll finishing device according to embodiment 2 of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals are given to the same portions.

Embodiment 1.

Fig. 1 is a schematic configuration diagram of a roll finishing device according to embodiment 1 of the present invention. Fig. 2 is a schematic perspective view showing a state in which a cylindrical workpiece is mounted on a workpiece holding device of a roll finishing device according to embodiment 1 of the present invention. Fig. 3 is a schematic perspective view of a cylindrical workpiece processed by the roll finishing device according to embodiment 1 of the present invention.

First, the configuration of a roll finishing device 100 according to embodiment 1 will be described with reference to fig. 1. The polishing apparatus 100 includes: a tool moving device 10 that performs a polishing process while relatively moving a processing tool 30 with respect to a cylindrical workpiece that is a target to be processed; and a workpiece holding device 40 that holds a cylindrical workpiece. The polishing process is a process of improving a convex portion on the surface of the object by slightly plastically deforming the surface of the object. In this specification, as shown in fig. 2, a cylindrical workpiece to be processed is a cylinder 1 of a rotary compressor, and a case where a surface to be processed is a blade attachment groove 5 will be described as an example.

The tool moving device 10 includes: a machining tool 30; a lifting part 11 for fixing the processing tool 30 and lifting up and down; and a slide table 12 for moving the lifting/lowering unit 11 in the vertical direction. The tool moving device 10 further includes: a ball screw 13 for moving the slide table 12; a driving device 14 that drives the ball screw 13; a guide 15 that holds the slide table 12; and a main body guide 16 supporting the guide 15. The tool moving device 10 further includes: a slide table 17 that moves the main body guide 16 in the horizontal direction; a ball screw 18 for moving the slide table 17; a guide 19 that holds the slide table 17; and a driving device 20 that drives the ball screw 18. As shown by an arrow in fig. 1, the tool moving device 10 thus configured is configured as follows: the processing tool 30 is moved in the vertical direction by the rotation of the ball screw 13, and the processing tool 30 is moved in the left-right direction of fig. 1 by the rotation of the ball screw 18.

Next, the workpiece holding device 40 will be described with reference to fig. 1 and 2.

The work holding device 40 includes: a stage 41; in the present embodiment, 3 work tables 42 are arranged on the table 41, and the work tables 42 are placed on the cylinder 1; and workpiece pressing portions 43 provided in the same number as the workpiece holders 42, for pressing the cylinder 1 against the workpiece holders 42.

A first positioning pin 44 is mounted on one of the two work piece tables 42a on the right inner side (right side in fig. 1) of fig. 2 among the 3 work piece tables 42. Further, a second positioning pin 45 is attached to the remaining work stage 42b. By inserting the first positioning pin 44 and the second positioning pin 45 into the first reference hole 3 and the second reference hole 4 formed in the cylinder 1, the cylinder 1 is disposed on the work carrier 42 so as to be positioned in the horizontal direction. In addition, the upper surface of the cylinder 1 is pressed by the work pressing portion 43, thereby preventing the cylinder 1 from floating during the roll finishing.

In this way, the cylinder 1 is provided on the stage 41 with the first positioning pin 44 and the second positioning pin 45 fixed in phase, and thus, for example, a conveying operation to a subsequent step such as a deburring step of the blade attachment groove 5 can be easily performed. That is, when the cylinder 1 is put into the stage of the subsequent process, the positioning of the phase of the cylinder 1 is not required to be performed again, and the through hole 2 of the cylinder 1 is held by the transfer chuck (not shown), so that the phase of the cylinder 1 on the current stage 41 is maintained, and the transfer to the stage of the subsequent process can be easily performed.

As shown in fig. 2 and 3, the cylinder 1 is formed in a cylindrical shape having a through hole 2 in the center, and a vane mounting groove 5 is formed radially outward from the inner peripheral surface. The vane mounting groove 5 is a space for sliding the vane during operation of the rotary compressor. If the surface properties of the inner surface of the vane mounting groove 5 are rough, it is not preferable to use the cylinder 1, for example, because the sliding resistance is increased due to the interference of the protrusions of the surface properties when the vane reciprocates in the vane mounting groove 5. Therefore, the inner side surface of the blade attachment groove 5 needs to be polished in advance with high precision.

Next, the processing tool 30 will be described.

Fig. 4 is a schematic cross-sectional view of a working tool of the roll finishing device according to embodiment 1 of the present invention. Fig. 5 is a schematic perspective view of a working tool of the roll finishing device according to embodiment 1 of the present invention.

The processing tool 30 includes: a mounting shaft 32 mounted to the lifting part 11 of the tool moving device 10; and a support portion 33 fixed to a lower end portion of the mounting shaft 32 and supporting the roll finishing shaft 31. The roll finishing shaft 31 is formed to have a diameter R (R mm. Ltoreq.A mm+DeltaA mm) larger than a width A (see FIG. 7 described later) of the vane mounting groove 5 of the cylinder 1 to be finished. The polishing shaft 31 is made of a harder material than the cylinder 1.

The support portion 33 has the following structure: the first support member 34 for supporting one end of the polishing shaft 31 and the second support member 35 for supporting the other end are fastened by the fastening member 36 in a state separated in the axial direction of the mounting shaft 32. The fastening member 36 may be any member as long as it can fasten the first support member 34 and the second support member 35, and is constituted by a bolt 36a and a nut 36b.

The first support member 34 is formed with a first insertion hole 37a into which one end of the roll finishing shaft 31 is inserted. In addition, a second insertion hole 37b into which the other end of the roll finishing shaft 31 is inserted is formed in the second support member 35. The first insertion hole 37a and the second insertion hole 37b have the same diameter D and have a diameter (Dmm.ltoreq.Rmm+ΔRmm) larger than the diameter R of the roll finishing shaft 31. Thus, the roll finishing shaft 31 is not fixed to the support portion 33, and is supported by the support portion 33 only in a state where both ends thereof are inserted into the first insertion hole 37a and the second insertion hole 37b, because of the relationship of Dmm.ltoreq.Rmm+ΔRmm. In this way, since the gap Δr exists between the polishing shaft 31 and the first insertion hole 37a and the second insertion hole 37b, the polishing shaft 31 can be moved in the horizontal direction within the range of the gap.

Next, the dimensional relationship between the working tool 30 and the cylinder 1 will be described.

Fig. 6 is a schematic cross-sectional view showing a dimensional relationship of a working tool of the roll finishing device according to embodiment 1 of the present invention. Fig. 7 is a plan view showing a dimensional relationship of a cylindrical workpiece processed by the roll finishing device according to embodiment 1 of the present invention.

The width W of the working tool 30 has a diameter (W mm < B mm-DeltaB mm) smaller than the diameter B of the through-hole 2 of the cylinder 1. The width L between the first support member 34 and the second support member 35 of the working tool 30 has a dimension (L [ mm ]. Ltoreq.Emm ] +ΔEmm ]) larger than the thickness E (refer to FIG. 3) of the cylinder 1.

Next, a method of polishing the inner surface of the vane mounting groove 5 of the cylinder 1 using the working tool 30 will be described.

Fig. 8 is a schematic perspective view showing a main part of a roll finishing device before roll finishing of a cylindrical workpiece machined by the roll finishing device according to embodiment 1 of the present invention. Fig. 9 is a schematic plan view showing a relationship between a roll finishing shaft and a blade mounting groove in the process of machining a cylindrical workpiece by the roll finishing device according to embodiment 1 of the present invention. In fig. 9, the outline arrow indicates the moving direction of the polishing shaft 31.

First, the driving device 20 is driven to move the slide table 17, and as shown in fig. 8, the processing tool 30 is moved until the center axis 30c (see fig. 6) of the processing tool 30 coincides with the center 2c (see fig. 7) of the through hole 2 of the cylinder 1. Thereafter, the driving device 14 is driven to move the slide table 12, and the lifting/lowering unit 11 to which the processing tool 30 is attached is lowered. Specifically, the lifting/lowering portion 11 is lowered until the polishing shaft 31 held by the processing tool 30 is located at a position facing the inner peripheral surface of the cylinder 1. Thereafter, the driving device 20 is driven to move the main body guide 16, the guide 15, the lifting portion 11, and the working tool 30, and the roll finishing shaft 31 is moved into the blade attachment groove 5.

Here, when the roll finishing shaft 31 is inserted into the blade attachment groove 5, as shown in fig. 9, a case is considered in which the center line 5c of the blade attachment groove 5 is offset from the center axis 31c of the roll finishing shaft 31. In this case, the polishing shaft 31 is strongly pressed to the inner side surface of the blade attachment groove 5. However, as described above, the polishing shaft 31 has a gap Δr with respect to the first insertion hole 37a and the second insertion hole 37b of the support portion 33. Therefore, when entering the blade mounting groove 5, the roll finishing shaft 31 moves in the horizontal direction along the blade mounting groove 5 so that the center axis 31c coincides with the center axis 5c of the blade mounting groove 5.

Then, the roll finishing shaft 31 enters the blade mounting groove 5 and is finished in a state where the central axis 31c of the roll finishing shaft 31 coincides with the central axis 5c of the blade mounting groove 5. Thus, the surface of the inner side surface of the blade attachment groove 5 is flattened and finished to a smooth surface, and the surface of the inner side surface of the blade attachment groove 5 can be polished uniformly and with high precision.

Fig. 10 is a diagram showing a relationship between a radial position and surface flatness of a blade mounting groove before and after machining in the roll finishing device according to embodiment 1 of the present invention. Fig. 10 (a) shows the surface flatness [ μm ] corresponding to the radial position [ mm ] of the blade mounting groove 5 before the roll finishing. Fig. 10 (b) shows the surface flatness [ μm ] corresponding to the radial position [ mm ] of the blade mounting groove 5 after the roll finishing.

It is found that the surface flatness of the inner surface of the blade attachment groove 5 after the polishing process is flattened and the convex portions on the surface are finished into a smooth surface shape with few convex portions, as compared with that before the polishing process.

However, the diameter D of each of the first insertion hole 37a and the second insertion hole 37b into which the roll finishing shaft 31 is inserted is set to be larger than the diameter R of the roll finishing shaft 31 by Δr as described above, but the magnitude of Δr is in an appropriate range. In fig. 9, a case is considered in which the value of the dimension F is 0.4mm and the center axis 31c of the roll finishing shaft 31 is offset from the center line 5c of the blade attachment groove 5 by about 0.1mm in the radial direction. Here, the dimension F is the length of the circumferential direction of the edge portion formed by the through hole 2 and the blade attachment groove 5.

In this case, when the value of Δr is set to 0.5mm or more, the roll finishing shaft 31 interferes with the inner peripheral surface of the through hole 2 except for the edge portion formed by the through hole 2 and the blade attachment groove 5, and the possibility of damage or the like to the cylindrical workpiece increases. Therefore, the optimum value of Δr in this case is set to 0.4mm±0.1. The optimum value of Δr described here is a value related to the cylinder 1 of the rotary compressor. Therefore, even when machining a groove formed from the inner peripheral surface of another tubular workpiece toward the outside, it is not problematic to appropriately select Δr according to the size of the tubular workpiece.

Further, by forming the structure to doubly support the both ends of the roll finishing shaft 31 so that the gap is provided between the both ends of the roll finishing shaft 31 and the first insertion hole 37a and the second insertion hole 37b, it is possible to prevent the roll finishing shaft 31 from being greatly deflected during the machining as in the conventional cantilever fixing method. Therefore, partial uneven wear of the surface of the polishing shaft 31 can be prevented.

Since the ends of the polishing shaft 31 are not fixed, the polishing shaft 31 can rotate in the circumferential direction during the polishing. Therefore, the entire circumference of the polishing shaft 31 can be uniformly pressed against the blade attachment groove 5. Therefore, partial uneven wear of the surface of the polishing shaft 31 can be prevented, the tool life can be greatly improved, and polishing can be performed with high accuracy, as compared with the conventional cantilever fixing method.

Fig. 11 is a diagram showing the shape of the shaft surface after machining at 153.6 m/root using a conventional cantilever-fixed machining tool. Fig. 12 is a diagram showing the shape of the shaft surface after machining at 2304 m/root using the two-end support type machining tool according to embodiment 1 of the present invention. The term 153.6 m/piece means that the cumulative working length of each of the roll finishing shafts is 153.6m.2304 m/root is also the same meaning. Further, the processing length of each work was 0.0768m.

As shown in fig. 11, when the conventional working tool is used, uneven wear occurs on the surface of the polishing shaft 31 after the working is performed at 153.6 m/root. However, as shown in fig. 12, when the working tool 30 of embodiment 1 was used, uneven wear did not occur on the surface of the roll finishing shaft 31 even after the working was performed at 2304 m/piece, and the improvement of the tool life was confirmed.

Fig. 13 is a diagram showing the difference in surface pressure caused by the presence or absence of uneven wear on the surface of the polishing shaft. Fig. 13 (a) shows a case where there is no uneven wear on the surface of the polishing shaft 31. Fig. 13 (b) shows a case where uneven wear occurs on the surface of the polishing shaft 31. In fig. 13, the arrows indicate the surface pressure distribution.

As shown in fig. 13 (a), when the surface of the polishing shaft 31 is not worn out, the contact between the polishing shaft 31 and the inner surface 5a of the blade attachment groove 5 is a cylindrical-to-flat contact. Therefore, the surface pressure of the central portion of the cylinder increases, and the protrusion improvement amount, which is the plastic deformation amount during the roll finishing, increases.

On the other hand, as shown in fig. 13 (b), when uneven wear occurs on the surface of the polishing shaft 31 and a flat surface is formed on the surface of the polishing shaft 31, the contact between the polishing shaft 31 and the inner surface 5a of the blade mounting groove 5 is a planar contact. Therefore, the surface pressure becomes low, and the amount of improvement in the convex portion, which is the plastic deformation amount at the time of the polishing, becomes small. In this way, if uneven wear occurs on the surface of the polishing shaft 31, the workability becomes poor, and thus the tool life is reduced. Therefore, the working tool 30 of embodiment 1, which can prevent uneven wear, is effective in improving the tool life.

As described above, in the processing tool 30 according to embodiment 1, both ends of the roll finishing shaft 31 are supported so as to have a gap between both ends of the roll finishing shaft 31 and the first insertion hole 37a and the second insertion hole 37b of the support portion 33. Therefore, the large deflection of the polishing shaft 31 during the processing can be prevented, and partial uneven wear of the surface of the polishing shaft 31 can be prevented. Therefore, the tool life can be greatly improved. Further, since a large deflection of the polishing shaft 31 during processing can be prevented, polishing can be performed uniformly and highly accurately on the entire surface of the inner side surface of the blade attachment groove 5. Therefore, the surface properties of the inner surface of the blade attachment groove 5 can be finished into a smooth surface with few protrusions as shown in fig. 10.

Further, since the roll finishing shaft 31 is rotatable in the circumferential direction, the entire circumferential surface of the roll finishing shaft 31 can be uniformly pressed against the blade attachment groove 5 during the finishing. Therefore, from this point of view, localized uneven wear of the surface of the polishing shaft 31 can be prevented, the tool life can be greatly improved, and polishing can be performed with high accuracy. In addition, since the tool life can be increased, mass production processing can be performed at low cost.

Further, in the cylinder 1 in which the inner surface of the vane mounting groove 5 is finished by using the roll finishing device 100 of embodiment 1, the friction coefficient of the inner surface of the vane mounting groove 5 is reduced. In this way, in the rotary compressor using the cylinder block 1 in which the friction coefficient of the inner side surface of the vane mounting groove 5 is reduced, the vane can slide in the vane mounting groove 5 without being obstructed by the convex portion of the inner side surface of the vane mounting groove 5 during operation. Therefore, a rotary compressor having high sliding property of the vane, high efficiency and high performance can be obtained.

In embodiment 1, a description has been given of a configuration in which the working tool 30 is movable in the horizontal direction while being movable in the thickness direction of the cylinder block 1. However, the present invention is not limited to the above-described configuration, and the processing tool 30 side may be fixed, and the cylinder 1 side may be moved in the thickness direction, the horizontal direction, and the like, so long as the same movement can be relatively performed, and the configuration is not limited.

Embodiment 2.

Embodiment 2 has a structure in which part of the constituent members of the processing tool in embodiment 1 are integrated. Hereinafter, differences between embodiment 2 and embodiment 1 will be mainly described, and configurations not described in embodiment 2 are the same as those of embodiment 1.

The processing tool 50 of embodiment 2 has the following structure: the mounting shaft 51 mounted to the lifting/lowering portion 11 of the tool moving device 10 is integrally formed with the support portions 52 that support both ends of the polishing shaft 31. The support portion 52 is formed with a first insertion hole 52a and a second insertion hole 52b extending in the axial direction of the mounting shaft 51 so as to be coaxial with each other. The second insertion hole 52b opens to the lower end surface 52c of the support portion 52, and the roll finishing shaft 31 is inserted from this opening. In order to prevent the roll finishing shaft 31 from falling out of the opening, the pressing plate 53 is fixed to the lower end surface 52c of the support portion 52 by a tightening screw 54.

The first insertion hole 52a and the second insertion hole 52b are separated from each other in the axial direction of the mounting shaft 51, and both ends of the roll finishing shaft 31 are inserted into the first insertion hole 52a and the second insertion hole 52b and supported. The first insertion hole 52a and the second insertion hole 52b are the same as the first insertion hole 37a and the second insertion hole 37b of embodiment 1, and have a gap Δr between them and the roll finishing shaft 31.

According to the processing tool 50 of embodiment 2 configured as described above, the same effects as those of embodiment 1 can be obtained, and the support portion 52 is configured so as to integrate the first support member 34 and the second support member 35 of embodiment 1, so that the following effects can be obtained. That is, if the first support member 34 and the second support member 35 are formed independently, it is necessary to adjust the first insertion hole 37a and the second insertion hole 37b so as to be coaxial when the processing tool 30 is assembled. The reason for this is that, if the axes are not coaxial, the roll finishing shaft 31 is inclined, and therefore, at the time of finishing, the roll finishing shaft 31 enters the blade attachment groove 5 in an inclined state, and the roll finishing cannot be performed with high accuracy.

On the other hand, the machining tool 50 according to embodiment 2 has a structure in which the first insertion hole 52a for supporting one end of the roll finishing shaft 31 and the second insertion hole 52b for supporting the other end are formed as one member, and is coaxial. Therefore, it is not necessary to perform coaxial adjustment at the time of changing the tool, and the tool can be easily changed in a short time. In embodiment 2, the first insertion hole 52a and the second insertion hole 52b are coaxial, whereby the problem of tilting of the roll finishing shaft 31 can be avoided, and the roll finishing with high accuracy can be easily performed.

The machining tool 50 according to embodiment 2 has a structure in which the mounting shaft 51 and the support portion 52 are integrally formed. In other words, the mounting shaft 32, the first support member 34, the second support member 35, and the fastening member 36 according to embodiment 1 are integrally formed. By forming the components as a single body in this manner, the rigidity of the processing tool 50 can be increased as compared to a structure in which these components are formed as separate bodies. Further, by increasing the rigidity of the processing tool 50, the tool replacement can be easily performed.

In fig. 14, the roll finishing shaft 31 is inserted from the lower portion of the working tool 50, but may be inserted from the upper portion of the working tool 50. The structure is not limited as long as the roll finishing shaft 31 can be easily inserted into the first insertion hole 52a and the second insertion hole 52b.

Description of the reference numerals

Cylinder block; through holes; center of through hole; first reference well; a second reference well; blade mounting slots; inner side; center line; tool moving means; lifting part; sliding table; ball screw; driving means; a guide; body guide; a sliding table; ball screw; a guide; driving means; processing tools; central axis; a roll finishing shaft; central axis; mounting a shaft; a support; a first support member; a second support member; fastening components; bolts; nuts; first insertion hole; second insertion hole; 40. a workpiece holding device; stage; work piece carrier; work piece carrier; work piece carrier; work piece pressing part; 44. a first locating pin; 45. a second locating pin; processing tools; 51. mounting a shaft; support part; first insertion hole; second insertion hole; lower end face; 53. press plate; 54. the fastening bolt.

Claims

1. A processing tool for holding a polishing shaft used in a polishing device for polishing an inner surface of a groove formed from an inner peripheral surface of a cylindrical workpiece to an outer side,

the processing tool is characterized in that,

the device is provided with: a support unit that doubly supports both ends of the polishing shaft so as not to fix both ends of the polishing shaft; and a mounting shaft mounted to a tool moving device of the roll finishing device,

the support section is provided with: a first support member that supports one end of the polishing shaft; a second support member that supports the other end of the polishing shaft; and a fastening member that fastens the first support member and the second support member,

the mounting shaft, the first support member, the second support member, and the fastening member are integrally formed.

2. The tool according to claim 1, wherein,

the first support member is formed with a first insertion hole into which one end of the roll finishing shaft is inserted, and the second support member is formed with a second insertion hole into which the other end of the roll finishing shaft is inserted.

3. The process tool of claim 2, wherein,

the diameters of the first insertion hole and the second insertion hole are larger than the diameter of the polishing shaft, and the polishing shaft is supported with a gap between the first insertion hole and the polishing shaft and between the second insertion hole and the polishing shaft.

4. A roll finishing device is characterized in that,

a working tool according to any one of claims 1 to 3.