JP2016068157A - Surface processing method of workpiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To process a sheave surface more easily.SOLUTION: A surface processing method of a workpiece includes: a process of forming a sheave processed surface 1411 by radially displacing a nose 221 pressed to a sheave surface 141 at a first feed speed s1 in a state that the nose is held in a position of a predetermined cut depth ha with the sheave surface 141 of a workpiece 10 before cutting as a reference, and shallowly cutting the sheave surface 141 of the workpiece 10 by the thickness hb depending on elastic deformation of a base part 21 by reaction force R1 acting from the sheave surface 141; and a process of forming a groove 1412 by radially displacing the nose 221 raised and pressed to the sheave processed surface 1411 at a second feed speed s2 higher than the first feed speed s1 in a state that the nose is held in a position of the predetermined cut depth ha with the sheave surface 141 of the workpiece 10 before cutting as a reference, and shallowly cutting the sheave processed surface 1411 by the thickness hc depending on elastic deformation of the base part 21 by reaction force R2 acting from the sheave processed surface 1411.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a workpiece surface processing method.

A pulley (primary pulley, secondary pulley) of a belt-type continuously variable transmission includes a fixed conical plate having a flange-like sheave portion in a shaft portion, and a movable conical plate having a flange-like sheave portion in a cylindrical base portion. And have a basic structure assembled together on the same axis.
The movable conical plate is assembled to the fixed conical plate by extrapolating the cylindrical base of the movable conical plate to the shaft portion of the fixed conical plate. In this state, the movable conical plate and the fixed conical plate are common. In a state where relative rotation around the rotation axis is restricted, it is assembled so as to be relatively movable in the axial direction of the rotation axis.

A sheave surface that is inclined at a predetermined angle with respect to the rotation axis is provided at the mutually facing portion of the sheave portion of the movable conical plate and the sheave portion of the fixed conical plate, and the sheave portion of the movable conical plate and the sheave of the fixed conical plate A V-shaped groove (hereinafter referred to as “V-groove”) around which a metal belt of the continuously variable transmission is wound is formed between the two portions.
In a belt type continuously variable transmission for a vehicle, the wrapping radius of the belt in the primary pulley and the secondary pulley is changed by moving the movable conical plate in the axial direction of the rotating shaft and changing the width of the V groove. The sheave surfaces of the movable conical plate and the fixed conical plate are provided with grooves for the purpose of adjusting the frictional force with the belt.

  Patent Document 1 discloses a method of machining a groove on a sheave surface.

Japanese Patent Laid-Open No. 02-030437

  In Patent Document 1, (1) a groove cutting tool is rotated around a rotation axis while rotating a movable conical plate or a fixed conical plate (hereinafter referred to as a workpiece) having a sheave surface before the groove is processed. After pressing against the sheave surface from the axial direction of the tool, the position of the tool is displaced in the axial direction and the radial direction of the rotating shaft, and a concentric groove centered on the rotating shaft is seen from the axial direction of the rotating shaft. A groove is formed on the sheave surface through a cutting process in which a plurality of cuts are made on the sheave surface, and (2) a polishing step in which the surface of the sheave surface on which the groove is formed is ground to generate compressive residual stress. Yes.

However, in the method of Patent Document 1, in order to adjust the shape of the sheave surface before the groove is processed, a surface processing step of cutting the surface of the sheave surface with a predetermined cutting depth is necessary before the cutting step. . In this surface machining process, the sheave surface is cut with a depth of cut that is deeper than the groove formed in the cutting process, so that cutting is performed using another tool having a cutting edge larger than the groove machining tool used in the cutting process. There is a need to.
Therefore, after the surface machining process, it is necessary to replace the surface machining tool with a groove machining tool, and it is necessary to adjust the position of the groove machining tool after the replacement.

  In addition, since the grooving tool has a narrower cutting edge than the surface machining tool, the grooving tool has a shorter tool life than the surface machining tool, and the wear amount of the tool is regularly set. Measurement was necessary.

  Therefore, there is a need to make it easier to process the sheave surface without the need to frequently change tools, measure the amount of wear, and adjust the position of the tool.

In the present invention, a tool for cutting is pressed against the surface of the workpiece from the axial direction of the rotating shaft while rotating the workpiece around the rotating shaft, and then the position of the tool is changed to the axial direction and the diameter of the rotating shaft. A workpiece surface processing method for cutting the surface of the workpiece by displacing in a direction,
After pressing the tool against the surface of the workpiece before cutting, the tool is held in a radial direction of the rotating shaft in a state where the tool is held at a predetermined cutting depth position with respect to the surface of the workpiece before cutting. A surface that is displaced at a first speed and cuts the surface of the workpiece shallower than a predetermined cutting depth based on the surface of the workpiece before cutting by an amount corresponding to the first elastic deformation of the tool. Processing steps,
After the surface machining step, the tool is held in the radial direction of the rotating shaft from the first speed in a state where the tool is held at the position of the predetermined cutting depth with respect to the surface of the workpiece before cutting. The surface of the workpiece is shifted by a second speed that is faster than the first elastic deformation of the tool by an amount corresponding to the second elastic deformation, which is smaller than the first elastic deformation of the tool. And a groove processing step of forming a groove by cutting shallower than the predetermined cutting depth.

According to the present invention, when a tool is pressed against the surface of the workpiece, the tool is elastically deformed by a reaction force acting from the surface of the workpiece. If the tool position when pressing the tool against the surface of the workpiece is set at a predetermined depth of cut based on the surface of the workpiece before cutting in both the surface machining step and the grooving step, the grooving step Thus, the reaction force acting on the tool is smaller than the reaction force acting on the tool in the surface machining process by the thickness of the workpiece cut in the surface machining process.
As a result, the reaction force acting on the tool in the grooving process is reduced, and the amount of elastic deformation of the tool in the grooving process is reduced. Therefore, in the grooving process, the cutting depth of the tool relative to the workpiece surface is determined by the elasticity of the tool. As the amount of deformation becomes smaller, the depth becomes deeper than in the surface machining process.
Here, in the grooving process, the cutting depth of the tool based on the workpiece surface before cutting becomes deeper than that in the surface machining process, but the workpiece surface before cutting in the grooving process is already surface processed. Since the cutting is performed at a predetermined depth in the process, in the grooving process, the workpiece surface is cut shallowly at the tip portion of the cutting edge of the tool.
Therefore, it is possible to perform surface machining and grooving with the same tool by utilizing the difference in the amount of elastic deformation of the tool in the surface machining process and the grooving process. The groove can be cut without the need to change the tool, measure the amount of wear, and adjust the position of the tool more frequently than when using it.

It is a figure explaining the surface processing method of the workpiece | work concerning embodiment. It is a flowchart explaining the flow of the surface processing method of the workpiece | work concerning embodiment. It is principal part sectional drawing explaining the processing state of the sheave surface which concerns on embodiment.

Hereinafter, a case where the workpiece surface processing method according to the embodiment is applied to processing of a sheave surface of a fixed conical plate of a pulley constituting a belt type continuously variable transmission for a vehicle will be described as an example.
FIG. 1 is a view for explaining a surface processing method of a fixed conical plate, and FIG. 1A is a view showing a work 10 (fixed conical plate) and a cutting tool 20 (tool) to be processed by a processing device for a sheave surface 141. It is a figure explaining arrangement | positioning, (b) is a front view of the workpiece | work 10 seen from the AA direction in (a), Comprising: It is a figure explaining the groove | channel 1412 formed in the sheave surface 141. FIG.

  As shown in FIG. 1A, the fixed conical plate (hereinafter referred to as “work 10”) is a conical sheave portion at a midway position in the longitudinal direction of the shaft portion 12 extending along the central axis X1. 14 has a basic shape, and one surface of the sheave portion 14 in the axial direction of the central axis X1 is a sheave surface 141 inclined by a predetermined angle with respect to the central axis X1.

A machining apparatus (lathe) used for machining the sheave surface 141 grips the rotation center 3 that rotatably supports one end of the shaft portion 12 in the longitudinal direction, and the other end of the shaft portion 12 in the longitudinal direction, and the workpiece 10. Is rotated around the central axis X1 and a tool (hereinafter referred to as “bite 20”) used for surface processing of the sheave surface 141 is provided.
When cutting the sheave surface 141 with this lathe, the tip 22 (blade) provided on the cutting tool 20 is moved from the axial direction of the central axis X1 with the workpiece 10 rotated about the central axis X1. Then, the sheave surface 141 is ground by displacing the contact position of the tip 22 with the sheave surface 141 in the radial direction of the central axis X1.

  As shown in FIGS. 1A and 1B, the cutting tool 20 has a quadrangular prism-shaped base portion 21, and a workpiece 10 is attached to one end portion (tip portion) in the longitudinal direction of the base portion 21. A chip 22 (blade) for cutting is attached, and the other end is connected to a driving mechanism of the cutting tool 20 (not shown).

In the embodiment, the cutting tool 20 is made of steel or the like, and the tip 22 is made of CBN or cemented carbide.
The tip of the nose 221 of the chip 22 has an R shape. Thereby, even when the nose 221 collides with the sheave surface 141 during cutting, the nose 221 is hardly chipped.

  The cutting tool 20 can be moved in the axial direction (arrow X direction in the figure) and the radial direction (arrow Y direction in the figure) of the central axis X1 by a drive mechanism (not shown), and when cutting the surface of the sheave surface 141. In this case, the position of the nose 221 of the tip 22 is held at a position of a predetermined cutting depth ha with reference to the position of the sheave surface 141 before cutting (see FIG. 3A) by a driving mechanism (not shown). In this state, it is controlled to be displaced in the radial direction of the central axis X1.

In the embodiment, in a state where the workpiece 10 is rotated around the central axis X1 at a constant speed V, the nose 221 of the tip 22 is moved to the initial position on the outer diameter side of the sheave surface 141 of the workpiece 10 (hereinafter referred to as “machining start”). (Referred to as “position P1”) from the axial direction of the central axis X1 and then the position of the nose 221 at a predetermined cutting depth ha with reference to the position of the sheave surface 141 before cutting (FIG. 3). (See (a)), while displacing to a predetermined position (hereinafter referred to as “processing end position P2”) on the inner diameter side (center axis X1 side), as viewed from the axial direction of the center axis X1. The sheave surface 141 is cut over the entire surface or spirally.
When the nose 221 reaches the machining end position P2, the nose 221 is moved in a direction away from the sheave surface 141 to finish cutting the sheave surface 141.

Next, the surface processing method of the workpiece 10 will be described.
FIG. 2 is a flowchart for explaining the flow of the surface processing method for the workpiece 10.
FIG. 3 is a cross-sectional view for explaining the processing process of the sheave surface 141, and (a) is a view for explaining the positional relationship between the sheave surface 141 before cutting and the nose 221 of the tip 22 included in the cutting tool 20. FIG. 6 is a diagram for explaining a predetermined cutting depth ha with reference to the sheave surface 141 before cutting. FIG. 3B is a diagram for explaining a state in which the sheave surface 141 is being cut by the nose 221 of the tip 22, and a predetermined cutting depth ha based on the sheave surface 141 before cutting and the actual cutting depth. (C) is a figure explaining the state in which the groove | channel 1412 is formed by cutting of the sheave processing surface 1411, Comprising: The sheave surface 141 before cutting is shown. It is a figure explaining the relationship between the predetermined cutting depth ha used as a reference | standard, and the actual cutting depth h2.

  The surface machining method of the workpiece 10 according to the embodiment includes a carburizing and quenching process (step 101), a surface machining process (step 102), a groove machining process (step 103), a groove depth measuring process (step 104), and a film lapping process. It implements in order of a process (step 105).

  First, in the carburizing and quenching process of step 101, the surface of the sheave surface 141 is hardened by carburizing and quenching and tempering the workpiece 10. This is because a metal belt is wound around the sheave surface 141, so that wear of the sheave surface 141 due to friction with the belt is suppressed.

As shown in FIG. 3B, in the surface machining step of step 102, the nose 221 of the tip 22 is moved to the axis of the central axis X1 while the workpiece 10 is rotated at a constant speed V around the central axis X1. After pressing against the machining start position P1 of the sheave surface 141 from the direction, the position of the nose 221 is held at the position of the predetermined cutting depth ha with reference to the sheave surface 141 before cutting (rotation) It is displaced at a predetermined displacement speed (first feed speed s1) up to the machining end position P2 on the axis X1 side.
Thereby, the sheave surface 141 before cutting is scraped, and the sheave processing surface 1411 is exposed to the surface.

In this surface processing step, when the sheave surface 141 before cutting is cut with the tip 22, the tip 22 provided at the tip of the base portion 21 is pressed against the sheave surface 141. At this time, the tip 22 of the base portion 21 is pressed. A reaction force R1 against the stress pressing the tip 22 against the sheave surface 141 acts on the one end side attached from the sheave surface 141, and this reaction force R1 is opposite to the pressing direction of the tip 22 against the workpiece 10. Acting in the direction.
Here, since the base end side of the base portion 21 to which the chip 22 is attached is cantilevered by a drive mechanism side member (not shown), one end side of the base portion 21 to which the chip 22 is attached is separated from the sheave surface 141. The acting reaction force R1 elastically displaces away from the sheave surface 141.

  Therefore, in the surface machining step, the position of the nose 221 of the chip 22 is set to be a predetermined cutting depth ha with reference to the sheave surface 141 before cutting (broken line in FIG. 3B). In fact, the cut depth of the nose 221 is actually shallower than the planned cut depth ha by a thickness hb corresponding to elastic deformation (first elastic deformation) on one end side of the base 21. The actual cutting depth h1 is shallower than the cutting depth ha set as the target (h1 = ha−hb), as shown by the solid line in FIG.

  Therefore, the depth at which the nose 221 of the chip 22 actually cuts the sheave surface 141 in the surface machining step is caused by elastic deformation rather than the position of the predetermined cutting depth ha with reference to the sheave surface 141 before cutting. The position is shallow by the depth hb.

Here, in the embodiment, the first feed speed s1 of the nose 221 is processed from the processing start position P1 of the sheave surface 141 by one displacement from the processing start position P1 of the nose 221 to the processing end position P2. The entire surface up to the position P2 is set to a speed at which the nose 221 can be cut without a gap.
Note that the number of times the sheave surface 141 is cut with the tip 22 in the surface machining step is not limited to one, but the sheave is changed by a plurality of displacements from the machining start position P1 of the nose 221 to the machining end position P2. The entire surface of the surface 141 from the processing start position P1 to the processing end position P2 may be cut by the nose 221 without a gap.

  As shown in FIG. 3C, in the grooving step of step 103, the nose 221 of the bite 20 is moved to the axis of the central axis X1 while the workpiece 10 is rotated at a constant speed V around the central axis X1. After pressing against the processing start position P1 of the sheave processing surface 1411 from the direction, the position of the nose 221 is held at the position of a predetermined cutting depth ha with reference to the sheave surface 141 before cutting (on the inner diameter side ( The rotary shaft X1) is displaced at a predetermined displacement speed (second feed speed s2) up to the machining end position P2.

Here, in this grooving process, the cutting tool 20 used for cutting in the surface processing process is used as it is for cutting the sheave processing surface 1411.
Further, in this grooving process, the displacement speed (second feed speed s2) when displacing the nose 221 from the machining start position P1 to the machining end position P2 is the displacement speed (first feed speed s2) of the nose 221 in the surface machining process. (S2> s1), the sieved surface 1411 obtained as a result of the surface machining step is scraped by the nose 221 with a gap in the radial direction.
Thus, a groove 1412 having a spiral shape when viewed from the axial direction of the central axis X1 is formed on the sheave processing surface 1411 by one displacement from the processing start position P1 of the nose 221 to the processing end position P2.

  In addition, the number of times that the sheave processing surface 1411 is cut with the chip 22 in the grooving step is not limited to one time, but due to a plurality of displacements from the processing start position P1 of the nose 221 to the processing end position P2, A groove 1412 having a spiral shape when viewed from the axial direction of the central axis X1 may be formed on the sheave processing surface 1411.

  Here, the inventor of the present application pays attention to the elastic deformation of the base 21 when cutting the sheave surface 141 and the sheave processing surface 1411 with the cutting tool 20 having the tip 22 attached to the tip, and uses the same tip 22. In addition, the cutting over the entire surface of the sheave surface 141 in the surface processing step and the cutting of the groove on the sheave processing surface 1411 in the groove processing step can be performed.

Specifically, the inventors of the present invention (1) elastic deformation occurs on one end side of the base portion 21 provided with the tip 22 when the sheave processing surface 1411 is cut in the grooving step, (2) If the position of the nose 221 when cutting the sheave surface 1411 in the grooving step is set to be a predetermined cutting depth ha with reference to the sheave surface 141 before cutting, the amount cut in the surface processing step Only when the reaction force R2 acting on the nose 221 of the tip 22 is reduced from the sheave processing surface 1411 and (3) the reaction force R2 acting on the nose 221 of the tip 22 is reduced, the tip 22 is provided accordingly. Since the amount of elastic deformation at one end of the base 21 is reduced, the actual depth of cut of the nose 221 with respect to the sheave processing surface 1411 is increased by the amount by which the amount of elastic deformation is reduced. Be deeper than the time of the process, to focus,
Even when the same tip 22 is used by making the second feed speed s2 in the radial direction of the rotation axis X1 of the cutting tool 20 in the grooving process higher than the first feed speed s1 in the surface machining process. It has been found that surface machining and grooving can be performed while the position of the nose 221 at the time of cutting is fixed at a predetermined cutting depth ha based on the sheave surface 141 before cutting.

  Therefore, in the embodiment, the position of the nose 221 when cutting the sheave surface 141 in the surface machining step and the position of the nose 221 when cutting the sheave surface 1411 in the grooving step are respectively the sheave before cutting. The second feed speed s2 in the radial direction of the rotation axis X1 of the cutting tool 20 in the grooving process is set to the first cutting speed ha in the grooving process after setting the predetermined cutting depth ha with respect to the surface 141. It is faster than the feed speed s1.

Therefore, in the grooving step, although the position of the nose 221 is set to be a predetermined cutting depth ha with reference to the sheave surface 141 before cutting (see the broken line in FIG. 3C), Actually, the cut depth of the nose 221 is shallower than the planned cut depth ha by a thickness hc corresponding to the elastic deformation (second elastic deformation) on the one end side of the base 21. The cutting depth h2 is shallower than the cutting depth ha set as a target (h2 = ha−hc), as indicated by the solid line in FIG.
Then, the groove 1412 is cut at an interval in the radial direction of the central axis X1 corresponding to the second feed speed s2.

In the groove depth measurement process (step 104) performed following the groove processing process in step 103, the depth h2 of the groove 1412 formed in the sheave processing surface 1411 is measured.
In the film wrapping process (step 105) performed subsequent to the groove depth process, film wrapping process conditions are determined based on the depth h2 of the groove 1412 measured in the groove depth measurement process. After that, the surface roughness finish of the sheave processing surface 1411 and the adjustment of the depth of the groove 1412 are performed based on the determined processing conditions.

As described above, considering the elastic deformation of the base portion 21 to which the tip 22 is attached due to the stress acting from the sheave surface 141 (sheave processing surface 1411), the sheave surface 141 (sheave processing surface) in the surface processing step and the grooving step. 1411) by setting the position of the nose 221 at the time of cutting, the first feed rate s1, and the second feed rate s2, the same chip 22 is used in the surface machining step and the grooving step. Both surface processing and grooving can be performed.
Therefore, a chip having a larger outer diameter than the cutting tool chip used in the conventional grooving process, such as a cutting tool 20 having a size 22 necessary for the surface processing process, is used. Both surface machining and grooving can be performed in the machining process. As a result, the durability of the tip 22 is improved as much as the tip 22 becomes larger. Therefore, wear of the tip 22 due to repeated cutting of the face surface is suppressed, and the replacement frequency of the tip 22 (bite 20) is reduced. Can do.

As described above, in the embodiment, the nose 221 of the tip 22 attached to the tip of the base 21 of the cutting tool 20 (tool) while rotating the workpiece 10 around the central axis X1 at a predetermined constant speed V, After pressing against the sheave surface 141 (surface) of the workpiece 10 from the axial direction of the rotation axis X1, the position of the nose 221 is displaced in the axial direction and the radial direction of the central axis X1 to cut the sheave surface 141 of the workpiece 10. A surface processing method for a workpiece
After the nose 221 is pressed against the sheave surface 141 of the workpiece 10 before cutting, the nose 221 is held at a predetermined cutting depth ha with respect to the sheave surface 141 of the workpiece 10 before cutting. By displacing the sheave surface 141 of the workpiece 10 in the radial direction of the axis X1, the elastic deformation of the base portion 21 by the reaction force R1 against the pressing force against the sheave surface 141 (first elastic deformation). A surface processing step (step 102) for forming a sheave processing surface 1411 by cutting shallower than a predetermined cutting depth ha based on the sheave surface 141 before cutting by an amount corresponding to the thickness hb according to
After pushing the nose 221 up to the sheave surface 1411 obtained in the surface machining step, the nose 221 is held at a predetermined cutting depth ha with reference to the sheave surface 141 of the workpiece 10 before cutting. Thus, from the radially outer diameter side of the rotary shaft X1 of the cutting tool 20 pressed against the sheave surface 141 of the workpiece 10 at a second feed speed s2 that is faster than the first feed speed s1 in the radial direction of the rotary shaft X1. The displacement toward the inner diameter side is performed at least once, and the sheave working surface 1411 of the workpiece 10 is elastically deformed (second elastic deformation) by the reaction force R2 against the pressing force against the sheave working surface 1411 (second elastic deformation). And a groove machining step (step 103) for forming a groove 1412 by cutting shallower than a predetermined cutting depth ha based on the sheave surface 141 before cutting by a thickness hc corresponding to the thickness hc. That was the method of processing the surface of the work.

When the nose 221 of the tip 22 is pressed against the sheave surface 141 (sheave processing surface 1411) of the workpiece 10, the reaction force corresponding to the pressing stress on the sheave surface 141 (sheave processing surface 1411) of the nose 221 is applied to the tip 22. Since (R1, R2) acts, the base 21 with the tip 22 attached to the tip is elastically deformed in the direction separating the tip 22 (nose 221) from the sheave surface 141.
Therefore, when the same tip 22 is used by making the second feed speed s2 in the radial direction of the rotation axis X1 of the cutting tool 20 in the grooving process higher than the first feed speed s1 in the surface machining process. However, it is possible to perform surface machining and grooving while the position of the nose 221 at the time of cutting is fixed at a predetermined cutting depth ha with the sheave surface 141 before cutting as a reference.
Furthermore, since both the surface machining and the groove machining can be performed with the same cutting tool 20, it is possible to machine the groove with high accuracy over a long period of time compared to the case of using different cutting tools for the surface machining and the groove machining. It is possible to reduce the frequency of tool replacement and the frequency of tool wear measurement and positioning.

  In the grooving step, the position of the tip 22 pressed against the sheave surface 141 of the workpiece 10 is continuously along the diameter line of the workpiece 10 in the radial direction of the rotation axis X1 of the workpiece 10 when viewed from the direction of the rotation axis X1. Thus, a spiral groove 1412 is formed on the sheave surface 141.

  Since a spiral groove 1412 is formed on the sheave surface 141 from the outer diameter side to the inner diameter side, for example, when lubricating oil is coated on the sheave surface 141, the frictional force between the sheave surface 141 and the metal belt is appropriately set. Can be adjusted.

  In the above-described embodiment, the position of the tip 22 pressed against the sheave surface 141 (the sheave processing surface 1411) is set to the position of the sheave surface 141 (the sheave processing surface 1411) in both the surface processing step and the groove processing step. Although the case of displacing from the outer diameter side to the inner diameter side has been illustrated, it may be displaced from the inner diameter side of the sheave surface 141 (sheave processing surface 1411) to the outer diameter side.

  Furthermore, in the case where the position of the tip 22 pressed against the sheave surface 141 (the sheave processing surface 1411) is displaced, the displacement is performed only in one direction from the outer diameter side to the inner diameter side. Is performed multiple times, for example, the displacement of the sheave surface 141 (sheave processing surface 1411) from the outer diameter side / inner diameter side to the inner diameter side / outer diameter side, and the inner diameter side / outer diameter in the radial direction of the rotating shaft. Cutting may be performed by alternately repeating displacement from the diameter side toward the outer diameter side / inner diameter side.

Also by doing in this way, it is possible to perform both surface processing and groove processing using the same cutting tool 20.
Particularly, when the displacement of the position of the tip 22 to the inner diameter side / outer diameter side and the displacement to the outer diameter side / inner diameter side are alternately performed, the position of the tip 22 is moved to the inner diameter side or the outer diameter side. Since the total amount of displacement of the chip 22 is smaller than when displacing in only one direction, the processing time in the surface processing step and the grooving step can be shortened.

  The present invention is not limited to the above-described embodiments, and includes various changes and improvements that can be made within the scope of the technical idea.

2 chuck device 3 rotation center 10 work 12 shaft portion 14 sheave portion 141 sheave surface 1411 sheave processing surface 1412 groove 20 bite 21 base portion 22 tip 221 nose P1 processing start position P2 processing end position R1, R2 reaction force ha, h1, h2 notch Depth s1 First feed speed (first speed)
s2 Second feed speed (second speed)

Claims (4)

While pressing the cutting tool against the surface of the workpiece from the axial direction of the rotating shaft while rotating the workpiece around the rotating shaft, the position of the tool is displaced in the axial direction and the radial direction of the rotating shaft. A workpiece surface processing method for cutting the workpiece surface,
After pressing the tool against the surface of the workpiece before cutting, the tool is held in a radial direction of the rotating shaft in a state where the tool is held at a predetermined cutting depth position with respect to the surface of the workpiece before cutting. A surface that is displaced at a first speed and cuts the surface of the workpiece shallower than a predetermined cutting depth based on the surface of the workpiece before cutting by an amount corresponding to the first elastic deformation of the tool. Processing steps,
After the surface machining step, the tool is held in the radial direction of the rotating shaft from the first speed in a state where the tool is held at the position of the predetermined cutting depth with respect to the surface of the workpiece before cutting. The surface of the workpiece is shifted by a second speed that is faster than the first elastic deformation of the tool by an amount corresponding to the second elastic deformation, which is smaller than the first elastic deformation of the tool. And a groove processing step of forming a groove by cutting shallower than the predetermined cutting depth. In the groove processing step,
Displacement of the tool pressed against the surface of the workpiece from the radial inner diameter side to the outer diameter side of the rotating shaft is performed at least once to cut the groove on the surface of the workpiece. The workpiece surface processing method according to claim 1. In the groove processing step,
Displacement of the tool pressed against the surface of the workpiece from the radially outer diameter side / inner diameter side to the inner diameter side / outer diameter side of the rotating shaft, and the inner diameter side / outer diameter side of the rotating shaft in the radial direction. The workpiece surface processing method according to claim 1, wherein the groove is cut on the surface of the workpiece by alternately repeating displacement from the outer diameter side / inner diameter side.   In the grooving step, the position of the tool pressed against the surface of the workpiece is continuously displaced along the diameter line of the workpiece in the radial direction of the rotation axis of the workpiece as viewed from the direction of the rotation axis. 4. A workpiece surface processing method according to claim 1, wherein a spiral groove is formed on the surface of the workpiece.

Images