JP2011218506A - Superfinishing method and superfinishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continuously and smoothly perform superfinishing work on a workpiece having a first groove and a second groove with high accuracy for both the grooves.SOLUTION: The superfinishing method includes: a first groove finishing step of mounting a workpiece W having the first groove and the second groove having angular directions different from each other on a driving device, and forwardly pressing a superfinishing grinding stone to the first groove, oscillating the grinding stone while driving the workpiece, and then retracting the grinding stone; and a second groove finishing step of forwardly pressing the superfinishing grinding stone to the second groove, oscillating the grinding stone while driving the workpiece W, and then retracting the grinding stone. Between the two steps, the method includes; an angle changing step of changing angles of a rocking link so as to adapt the tilt angle of a grinding stone holder from the first groove to the second groove; and a groove changing step of moving the superfinishing grinding stone in a direction parallel to a linking member to make the grinding stone face from the first groove to the second groove.

Description

  The present invention relates to a superfinishing method and a superfinishing apparatus.

  In the superfinishing apparatus, a pair of parallel link members, a pair of swing links that are crossed and connected to the pair of link members and parallel to each other, and connected to the distal ends of the pair of link members, A grindstone holder parallel to the rocking link is provided, and the base of the pair of rocking links is pivotally supported around the rocking shaft on the machine body side. Cylinder means that presses the superfinishing grindstone toward the tip side with fluid pressure is incorporated, and the superfinishing grindstone side of the grindstone holder protrudes in parallel with the base side of the swing link from the pair of link members, By reciprocatingly swinging one of the pair of swing links around the swing shaft, the grindstone holder is oscillated around the swing center on the tip side of the superfinished grindstone (swing angle ± β) and the one Swing link Some have a super finishing unit that changes the angle of the grindstone holder around the rocking center by changing the angle around the rocking shaft to change the rocking center angle α of the oscillation.

  In this type of conventional superfinishing method using a superfinishing unit, for example, when the workpiece is an angular ball bearing having a first groove and a second groove having different angular directions, the first groove and the second groove When superfinishing the groove, there is provided a moving means for moving the superfinishing unit greatly and accurately in the X direction parallel to the pair of link members and the Y direction for moving the superfinishing grindstone back and forth toward the work groove. When the workpiece was mounted on the drive and the workpiece was driven, the superfinishing grindstone was pressed against the first groove to oscillate and superfinish, and then the second groove was superfinished. , Reattach the work piece to the driving device so that the second groove of the work fits the superfinishing wheel, and then push the superfinishing wheel forward into the second groove while driving the work A second groove has been super finishing and Deployment.

JP 2009-269111 A

Therefore, in the conventional case, when the first groove is superfinished and when the second groove is superfinished, the mounting state of the work on the driving device is slightly different. It has become difficult to achieve high-precision superfinishing corresponding to the grooves. Further, it was impossible to achieve a smooth superfinish that was continuous between the first groove and the second groove.
In view of the above problems, the present invention provides a superfinishing method and a superfinishing apparatus capable of continuously and smoothly performing high-precision superfinishing corresponding to each other on a workpiece having a first groove and a second groove. For the purpose.

The technical means of the present invention that solves this technical problem includes a pair of parallel link members, a pair of swing links that are crossed and connected to the pair of link members, and a pair of link members. A grindstone holder that is connected to the tip end side of the wheel and is parallel to the rocking link. The base of the pair of rocking links is pivotally supported on the machine body so as to be able to swing around the rocking shaft. The super finishing whetstone is held in an outward projecting shape, and cylinder means for pressing the super finishing whetstone toward the tip side with fluid pressure is incorporated, and the super finishing whetstone side of the whetstone holder is pivoted from a pair of link members. Projecting parallel to the base side of
By reciprocatingly swinging one of the pair of swing links around the swing shaft, the grindstone holder is oscillated around the swing center on the tip of the superfinished grindstone, and the one swing link is swung around the swing shaft. It has a super finishing unit that changes the oscillation center angle of the oscillation by changing the angle around the oscillation center by changing the angle around the oscillation center,
A work having a first groove and a second groove with different angular directions is mounted on a driving device, and while driving the work, a superfinishing wheel is advanced and pushed into the first groove and oscillated, and then retracted. The inclination angle of the grindstone holder between the first groove finishing step to be driven and the second groove finishing step of pushing and oscillating the superfinishing grindstone in the second groove while driving the workpiece, and then retreating it. Changing the angle of the oscillating link so as to fit from the first groove to the second groove, and moving the superfinishing grindstone from the first groove to the second groove in a direction parallel to the link member. And a groove changing step.

  Another technical means of the present invention is an angular contact ball bearing in which the work has a first groove, a second groove, and a small-diameter portion between the grooves, and the first groove finishing step superfinishes the first groove. The grindstone is advanced, pressed and oscillated, and then the superfinishing grindstone is retracted to be slightly separated from the first groove, and the angle changing step is provided after the first groove finishing step. The angle changing step is a step of changing the angle of the swing link so that the inclination angle of the grindstone holder fits the second groove and then retracting the superfinishing grindstone more than the small-diameter portion between the grooves.

  Further, another technical means of the present invention is an angular contact ball bearing in which the workpiece has a first groove, a second groove, and a small-diameter portion between grooves, and the angle changing step is provided after the groove changing step, In this angle changing step, the superfinishing grindstone is advanced from a position retracted from the small-diameter portion between the grooves to a position close to the second groove, and the inclination angle of the grindstone holder is adapted to the second groove at the position adjacent to the second groove. In the second groove finishing step, the super-finished grindstone is advanced and pressed and oscillated from the state slightly spaced from the second groove to the second groove, and then super The finishing grindstone is a step of retracting from the first groove.

According to another technical means of the present invention, the angle changing step changes the inclination angle of the grindstone holder so as to be larger than the oscillation center angle of oscillation with respect to the first groove or the second groove. In the point.
Another technical means of the present invention is that the inclination angle of the grindstone holder is set to be equal to or less than an addition angle obtained by adding the oscillation rocking angle to the oscillation rocking central angle.

  According to another technical means of the present invention, the work is mounted with the first groove disposed behind the second groove in the driving device, and the inclination angle of the grindstone holder is set to the first angle before the first groove finishing step. In a state where it is set larger than the oscillation center angle of oscillation for one groove, the grindstone holder is moved in a direction parallel to the link member, the grindstone holder is inserted into the workpiece, and the superfinished grindstone is moved to the first groove side. The tool-in process is provided.

According to another technical means of the present invention, the work is mounted with the second groove disposed behind the first groove in the driving device, and after the second groove finishing step, the inclination angle of the grindstone holder is set to the second angle. A tool-out process is provided in which the grindstone holder is moved in a direction parallel to the link member and the grindstone holder is taken out of the work in a state set larger than the oscillation center angle of the oscillation with respect to the groove.
In addition, another technical means of the present invention includes a pair of parallel link members, a pair of swing links that are crossed and connected to the pair of link members, and the distal ends of the pair of link members. And a grindstone holder that is connected to the rocking link in parallel with the rocking link, and a base of the pair of rocking links is pivotally supported around the rocking shaft on the machine body side. The superfinishing grindstone is held outwardly in the holder, and cylinder means for pressing the superfinishing grindstone toward the tip side with fluid pressure is incorporated, and the superfinishing grindstone side of the grindstone holder is swung from the pair of link members. Protruding parallel to the base side of the dynamic link,
By reciprocatingly swinging one of the pair of swing links around the swing shaft, the grindstone holder is oscillated around the swing center on the tip of the superfinished grindstone, and the one swing link is swung around the swing shaft. A super-finishing device comprising a super-finishing unit that changes the angle of the grindstone holder around the rocking center by changing the angle around the rocking center angle to change the oscillation rocking angle of the oscillation,
A moving mechanism for moving the superfinishing unit in the X direction parallel to the pair of link members and the Y direction in which the superfinishing grindstone is moved back and forth toward the groove of the workpiece is provided.

According to another technical means of the present invention, bearing protrusions that face each other are protruded from bearing portions that support the support shafts of the pair of link members, and the one swing link is largely swung around the swing shaft. When moved, the bearing protrusions of the pair of link members are shifted in the X direction and mesh with each other.
Another technical means of the present invention is that a supply channel for supplying fluid to the cylinder means is provided on a support shaft that supports the base side of the grindstone holder of the pair of link members. is there.

  According to another technical means of the present invention, the supply flow path is formed in a shaft hole of the support shaft and communicates with a cylinder of the cylinder means, and communicates with the first communication hole. The second communication hole along the outer surface of the member has an L shape, and a hose for supplying fluid to the cylinder is connected to the second communication hole and arranged along the longitudinal direction of the link member. is there.

  According to the present invention, between the first groove finishing step and the second groove finishing step, an angle changing step for changing the angle of the swing link, and a groove changing step for moving the superfinishing grindstone in a direction parallel to the link member. Therefore, when the first groove is superfinished and when the second groove is superfinished, the mounting of the workpiece on the driving device is not changed. High-precision superfinishing corresponding to the second grooves can be achieved. Further, when the first groove is superfinished and when the second groove is superfinished, it is not necessary to remount the workpiece on the driving device, and the first groove and the second groove are continuously superposed. Finish can be made.

  In addition, according to the present invention, since the moving mechanism for moving the superfinishing unit in the X direction and the Y direction is provided, when superfinishing the first groove and when superfinishing the second groove, Now, there is no need to change the mounting of the workpiece to the drive device, and the grindstone holder or superfinishing wheel can be easily moved from the superfinishing of the first groove to the second superfinishing while the workpiece is mounted on the driving device. Therefore, it is possible to achieve super-finishing with high accuracy corresponding to the first groove and the second groove. Further, when the first groove is superfinished and when the second groove is superfinished, it is not necessary to remount the workpiece on the driving device, and the first groove and the second groove are continuously superposed. Finish can be made.

It is a side view of the superfinishing apparatus which shows one Embodiment of this invention. It is a top view of the superfinishing apparatus. It is side surface sectional drawing of the superfinishing unit. It is a top view of the superfinishing unit. It is the sectional view on the AA line of the same FIG. It is a BB sectional view taken on the line of FIG. It is side surface sectional drawing of the same grindstone holder and a hose part. It is a bottom view of the whetstone holder and a hose part. It is an enlarged plan view of the front part of the link member. It is an enlarged plan view of the rear part of the link member. It is an enlarged plan view of the superfinished grindstone part. It is a block diagram of the control device. It is the same flowchart. It is process drawing which shows the process of the superfinishing. It is process drawing which shows the process of the superfinishing. It is process drawing which shows the process of another superfinishing. It is process drawing which shows the process of the superfinishing. It is process drawing which shows the process of the superfinishing. It is process drawing which shows the process of another superfinishing. It is process drawing which shows the process of the superfinishing. It is process drawing which shows the process of the superfinishing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, the superfinishing apparatus divides the superfinishing unit 1 and the superfinishing unit 1 in the X direction (front-rear direction, a direction parallel to a pair of link members 14 described later) and the Y direction (left-right direction, super described later). The moving mechanism 2 which moves the finishing grindstone 41 back and forth toward the groove of the workpiece W) and the control device 3 shown in FIG. 12 are provided.

  The moving mechanism 2 includes a lower support 5, a first moving body 6 that is movably incorporated in the Y direction (left and right direction) with respect to the lower support base 5, and an X direction (front and rear) Direction), a first motor 8 constituted by a servo motor that reciprocates the first moving body 6 in the Y direction, and a reciprocating drive of the second moving body 7 in the X direction. And a second motor 9 configured by a servo motor, and the superfinishing unit 1 is mounted on the second moving body 7. Therefore, the superfinishing unit 1 is accurately reciprocated in the X direction and the Y direction by the drive control of the first motor 8 and the second motor 9.

  3 and 4, the superfinishing unit 1 includes a unit support base 11, a swing motor 12 constituted by a servo motor, a link base 13 fixed on the unit support base 11, and a pair of parallel left and right links. A member 14, a pair of front and rear rocking links 15 that are crossed and connected to the pair of link members 14 and parallel to each other, and a grindstone holder 16 that is parallel to the rocking link 15 are provided.

The swing motor 12 is mounted on the unit support base 11, the drive shaft 18 protrudes downward from the upper wall of the unit support base 11, and a drive pulley 19 is fixed to the downward protrusion of the drive shaft 18.
As shown in FIG. 5, the link base 13 is formed in a U-shaped cross section and includes an upper support wall 21, a lower support wall 22, and a connection wall 23. A pair of front and rear swing shafts 25 in the vertical direction is supported between the upper support wall 21 and the lower support wall 22 of the link base 13 via bearings 26 so as to be rotatable about the shaft center. The base portion of the swing link 15 is fixed, whereby the base portions of the pair of swing links 15 are pivotally supported around the swing shaft 25 on the link base 13 (machine body side).

The rear swing shaft 25 protrudes downward from the lower support wall 22, and a driven pulley 28 is fixed to the downward projecting portion of the swing shaft 25. A timing belt 29 is wound around the driven pulley 28 and the drive pulley 19, and the rear swing shaft 25 to the rear swing link 15 are rotated around the shaft center of the swing shaft 25 by driving the swing motor 12. Is configured to swing back and forth.
As shown in FIGS. 3 to 6, the pair of link members 14 includes a pair of sandwiching rods 31 and 32 that sandwich the pair of rocking links 15 and the grindstone holder 16 in the thickness (vertical) direction, respectively. The pair of sandwiching rods 31 and 32 are connected and fixed by connecting members 33 and 34 such as bolts and nuts spaced apart from each other in the vertical direction. In addition, spacers 35 and 38 are provided between the pair of clamping rods 31 and 32.

  The pair of swing links 15 are connected to the pair of link members 14 so as to be relatively swingable about the support shaft 36, respectively. Each of the support shafts 36 is inserted into a pair of upper and lower clamping rods 31 and 32 and supported by a pair of swing links 15 via bearings 37 so as to be rotatable about the axis. As a result, the pair of link members 14 and the pair of swing links 15 are coupled around the support shaft 36 so as to be relatively rotatable.

The grindstone holder 16 is connected to the front end side of the pair of link members 14 via a support shaft (trunion shaft) 39 in the vertical direction, and the pair of link members 14, the pair of swing links 15, and the grindstone holder 16 are 6 It constitutes a parallel link mechanism of knots.
As shown in FIG. 6 to FIG. 9, the superfinishing grindstone 41 is held outwardly by the grindstone holder 16, and the superfinishing grindstone 41 is directed to the tip side to be fluid pressure (air pressure in the embodiment). Cylinder means 42 for pressing is incorporated. The grindstone holder 16 has a cylindrical cylinder 43, a cylinder cover 44 and a rod cover 45, and the rod of the cylinder means 42 is formed by a superfinishing grindstone 41. The superfinishing grindstone 41 side of the grindstone holder 16 protrudes from the pair of link members 14 in parallel with the base side of the swing link 15. The superfinishing grindstone 41 is held by a rod cover 45 through a guide member 46 so as to be movable out and in.

  Each of the four support shafts 39 has a head portion 39a and a shaft portion 39b. The head portions 39a of the respective support shafts 39 are formed to be long in the longitudinal direction of the link member 14, and the head portions 39a have two stoppers. The screws 47 are fastened and fixed to the holding rods 31 and 32 of the pair of link members 14 with the shaft portion 39b interposed therebetween. The shaft portion 39b of each support shaft 39 is inserted into the holding rods 31 and 32 of the pair of left and right link members 14, and is supported by the cylinder 43 of the grindstone holder 16 via a bearing 48 so as to be rotatable about the axis. ing. However, one support shaft 39 (support shaft 39A) located on the rear side of the cylinder 43 among the four support shafts 39 has a head portion 39a slightly thicker than the other three support shafts 39, and The link member 14 is formed long toward the front end (front side) of the sandwiching rods 31 and 32, and only the front side of the head 39 a is fastened and fixed to the sandwiching rods 31 and 32 by the two set screws 47. A supply channel 64 described later is formed on the rear side of the portion 39a.

  As shown in FIG. 9, a bearing protrusion 51 protrudes in a direction opposite to each other from a bearing portion that supports a support shaft 39 of the pair of link members 14 (respective holding rods 31 and 32). When the predetermined width of the bearing member 14 is maintained to maintain the predetermined rigidity of the link member 14 and the swing link 15 is swung around the swing shaft 25, the bearing protrusions 51 of the pair of link members 14 Are shifted in the X direction to engage with each other.

As shown in FIG. 10, meshing protrusions 54 protrude in the direction facing each other at the portion supporting the support shaft 36 of the pair of link members 14, thereby ensuring the width of the bearing portion in the link member 14. Thus, when the rocking link 15 is largely swung around the rocking shaft 25, the meshing convex portions 54 of the pair of link members 14 are shifted in the X direction and mesh with each other.
Further, the bearing portion that supports the support shaft 36 of the link member 14 on the base side (right side) of the swing shaft 25 has a fitting convex portion 55 and a pair of fitting concave portions 56 that sandwich the fitting convex portion 55. Or the fitting convex part 55 and the fitting recessed part 56 are provided, and when the rocking | fluctuation link 15 rock | fluctuates largely, the fitting recessed part 56 is comprised so that the rocking | fluctuation shaft 25 may be fitted. Thus, the swing range of the swing link 15 can be widened in a narrow space while maintaining the predetermined rigidity of the link member 14.

  In this embodiment, as shown in FIG. 9, the inclination angle θ of the swing link 15 to the grindstone holder 16 is set to ± 55 ° at the maximum. Further, the rocking center O of the superfinishing grindstone 41 is on a straight line connecting the axes of the pair of rocking shafts 25, and the axis of the rocking shaft 25 and the axis of the support shaft 36 adjacent thereto are located. The separation width and the separation width between the swing center O and the shaft center of the support shaft 39 adjacent thereto are at the same position.

As shown in FIG. 11, the tip end side of the superfinishing grindstone 41 is an arcuate tip contact surface 41a centering on the swing center O of the superfinishing grindstone 41, and the width D1 of the tip contact surface 41a is the workpiece D The width is set to be larger than the width D2 of the arc surface of the W ball groove (first groove 69 and second groove 70 described later).
The oscillation center angle α of the oscillation of the grindstone holder 16 is set so as to coincide with the angularity of the ball groove. Even if the superfinishing grindstone 41 is swung around the oscillation center O by the oscillation, the superfinishing grindstone The rocking angle (± β) of the grindstone holder 16 through the superfinishing grindstone 41 is set to the maximum rocking angle that maintains the state where the tip contact surface 41a of 41 is in contact with the entire arc surface of the ball groove. That is, if the inclination angle θ of the grindstone holder 16 is set within an addition angle (α + β) obtained by adding the oscillation rocking angle β to the oscillation rocking central angle α, the entire arc surface of the ball groove is The state which contacted a part of front-end | tip contact surface 41a of the superfinishing grindstone 41 is always hold | maintained. Accordingly, in the angle changing process and the tool-in process described later, the inclination angle (θ) of the grindstone holder 16 is equal to or less than the addition angle (α + β) obtained by adding the oscillation rocking angle β to the oscillation rocking central angle α. It is set to.

  Thus, by reciprocatingly swinging one (rear) swing link 15 around the swing shaft 25, the grindstone holder 16 is oscillated about the swing center O (by swing angle ± β). By changing the angle of the one rocking link 15 around the rocking shaft 25, the grindstone holder 16 is angled around the rocking center O to change the rocking center angle α of the oscillation. ing.

  As shown in FIG. 6, attachment of the grindstone holder 16, the superfinishing grindstone 41, and the grindstone holder 16 on the distal end side of the link member 14 in a tilted state in which the grindstone holder 16 tilts and swings from an orthogonal state orthogonal to the pair of link members 14. A supply flow path 64 for supplying fluid to the part and the cylinder means 42 is substantially accommodated in a circle C1 having a radius r1 as a protruding distance from the center P1 between the pair of link members 14 to the tip of the superfinishing grindstone 41.

That is, a notch 59 is formed in the corners of the sandwiching rods 31 and 32 of the pair of link members 14 at an angle, and the notch is notched at the outer periphery of the head 39a of the support shaft 39 (trunnion shaft). The cut-out portion 60 is provided, and the cut-out portions 61 that are diagonally cut out are provided at the left and right corners of the front end side of the grindstone holder 16 (rod cover 45).
A supply flow path 64 for supplying fluid to the cylinder means 42 is provided on the support shaft 39 (trunnion shaft) of the link member 14 that supports the base side of the grindstone holder 16 of the pair of link members 14. Yes.

  As shown in FIGS. 6 and 7, the supply flow path 64 is formed in the first communication hole 65 and the first communication hole 65 which are bored in the axis of the support shaft 39 and communicate with the cylinder 43 of the cylinder means 42. A second communication hole 66 that communicates with the outer surface of the link member 14 has an L shape, and a hose 67 for supplying fluid to the cylinder 43 of the cylinder means 42 is connected to the second communication hole 66. . The hose 67 is arranged along the longitudinal direction of the link member 14 toward the link member 14 base side (rear side).

  As a result, the grindstone holder 16 at the distal end side of the link member 14 is perpendicular to the longitudinal direction of the pair of link members 14 in a tilted state in which the grindstone holder 16 tilts and swings from an orthogonal state orthogonal to the pair of link members 14. Inside, a circle C1 having a radius r1 from the center P1 to the tip of the superfinishing grindstone 41 centered on the center P1 between the pair of link members 14 on the central axis of the grindstone holder 16 (φ61.6 mm in the embodiment) It is stored inside.

  More precisely, the supply flow for supplying fluid to the grindstone holder 16 on the tip end side of the link member 14, the superfinishing grindstone 41, the mounting portion of the grindstone holder 16, and the cylinder means 42 in the inclined state in which the grindstone holder 16 is tilted and swung. A circle C2 having a radius r2 as a protruding distance from the center P2 where the path 64 (including the hose 67) is shifted by L (about 2 mm) from the center P1 to the tip side of the superfinishing grindstone 41 and the tip of the superfinishing grindstone 41 In the form, it is stored within φ57.6 mm). Note that the circle C2 is within the circle C1.

  Therefore, for example, even when the workpiece W is a small-diameter angular contact ball bearing hub having the first groove 69 and the second groove 70 having different angular directions, the support shaft 39 (the trunnion shaft) in which the supply flow path 64 is formed, and Including the hose 67 for supplying fluid to the cylinder 43, the grindstone holder 16 portion on the distal end side of the link member 14 can pass in a state where the grindstone holder 16 is inclined with respect to the plane perpendicular to the axis of the workpiece W. Superfinishing even for a workpiece W having a small diameter (in the embodiment, the inner diameter is φ57.6 mm) so that the grindstone holder 16 cannot pass in a state parallel to the plane orthogonal to the axis of the workpiece W. It is configured to apply.

Further, in order to reduce the size of the cylinder means 42 or the grindstone holder 16, high pressure air (for example, 12 to 15 kg / cm ² ) is sent from the hose 67 to the cylinder means 42 using a booster valve (not shown).
In FIG. 12, the control device 3 includes a controller 71, servo amplifiers 72, 73, 74, and the like.

The controller 71 is a CPU for performing various arithmetic processes, a RAM for storing super finishing machining conditions and a program for controlling the servo amplifiers 72, 73 and 74, a storage device such as a large-capacity magnetic disk, and a super finishing machining. It consists of an input / output device (touch panel) that inputs conditions and the like and displays the status of super-finishing processing, an alarm device that notifies abnormality, and the like.
The controller 71 controls the swing motor 12 with respect to the servo amplifier 72 in accordance with the oscillation center angle α of the oscillation of the superfinishing grindstone 41, the oscillation angle β of the oscillation, the number of oscillations, the machining time, and the like input in advance. Instruct. Further, the controller 71 instructs not only the swing motor 12 but also the pressure control unit to press the super-finishing grindstone 41 against the surface to be ground of the workpiece W, and the X direction in accordance with the machining time inputted in advance. The movement is instructed to the servo amplifier 73 to control the second motor 9, and the movement in the Y direction is instructed to the servo amplifier 74 to control the first motor 8.

Next, in the case where the workpiece W is an angular ball bearing hub having a first groove 69 and a second groove 70 having different angular directions and having a small-diameter portion 77 between the grooves, the first groove 69. And the second groove 70 will be described with reference to the flowchart of FIG. 13 and the process diagrams of FIGS. 14 and 15.
First, as shown in FIG. 14A, the first groove 69 is disposed on the drive device 79 on the back side of the second groove 70 so that the workpiece W can be rotated around the axis via the bearing 80 shown in FIG. As shown in step S1 of FIG. 13 (hereinafter omitted in FIG. 13), the inclination angle θ of the grindstone holder 16 is set larger than the oscillation center angle α of the oscillation with respect to the first groove 69, and the grindstone holder 16 Is set to be equal to or smaller than an addition angle (α + β) obtained by adding the oscillation rocking angle β to the oscillation rocking central angle α, for example, the inclination angle θ of the grindstone holder 16 is With the addition angle (α + β) obtained by adding the oscillation swing angle β to the dynamic center angle α, the grindstone holder 16 is set in a direction parallel to the link member 14 as shown in step S2 and FIG. (X direction) To put the grindstone holder 16 in the work W, moves the superfinishing grindstone 41 in the first groove 69 side (tool in process).

  Thereafter, as shown in step S3 and FIG. 14C, the superfinishing grindstone 41 is advanced and pressed against the first groove 69 while driving the workpiece W, and the superfinishing grindstone 41 is moved by the cylinder means 42 as shown in step S4. Pressurize and oscillate, and stop pressurizing the superfinishing grindstone 41 by the cylinder means 42 as shown in step S5. Thereafter, as shown in step S6 and FIG. 14 (d), the superfinishing grindstone 41 is retracted from the first groove 69 (first groove finishing step).

  Next, the rocking of the grindstone holder 16 is stopped as shown in step S7, and the inclination angle θ of the grindstone holder 16 is changed from the first groove 69 to the second groove 70 as shown in step S8 and FIG. The angle of the swing link 15 is changed so as to match (angle changing step), and the superfinishing grindstone 41 is parallel to the link member 14 so as to face the second groove 70 from the first groove 69 as shown in step S9. Move in (X direction) (groove changing step). Note that either the angle changing step or the groove changing step may be performed first, and when the workpiece W is large, the groove changing step can be performed while performing the angle changing step.

  Next, as shown in step S10 and FIG. 15 (f), while driving the workpiece W, the superfinishing grindstone 41 is advanced (moved in the Y direction) and pressed against the second groove 70, and the cylinder means as shown in step S11. The superfinishing grindstone 41 is pressurized and oscillated by 42, and the pressurization of the superfinishing grindstone 41 by the cylinder means 42 is stopped as shown in step S12. Thereafter, as shown in FIG. 15G, the superfinishing grindstone 41 is moved backward from the second groove 70 (second groove finishing step).

Thereafter, the rocking of the grindstone holder 16 is stopped as shown in step S14, and the grindstone holder 16 is moved in the direction parallel to the link member 14 (X direction) as shown in step S15 and FIG. The grindstone holder 16 is taken out of the inside of W (tool out process). Thereafter, as shown in step S16, the inclination angle θ of the grindstone holder 16 is returned to 0 °.
In the above-described embodiment, the grindstone holder 16 on the tip end side of the link member 14, the superfinishing grindstone 41, and the grindstone holder 16 are tilted and swung from an orthogonal state orthogonal to the pair of link members 14. A supply flow path 64 for supplying fluid to the mounting portion of the grindstone holder 16 and the cylinder means 42 can be inserted, and superfinishing can be applied to a ball groove of a small work W such as a hub of an automobile.

  Moreover, the supply flow path 64 for supplying fluid to the cylinder means 42 has a first communication hole 65 and a first communication hole 65 which are bored in the axis of the support shaft 39 and communicate with the cylinder 43 of the cylinder means 42. The hose 67 for supplying fluid to the cylinder 43 is connected to the second communication hole 66 so as to be connected to the second communication hole 66. Since it is arranged along the longitudinal direction, the tip end side of the pair of link members 14 including the hose 67 for supplying the fluid to the cylinder 43 is configured compactly, and from the center between the pair of link members 14. The projection distance to the tip of the superfinishing grindstone 41 can be substantially stored in a circle C1 having a radius r1, and superfinishing can be easily and satisfactorily applied to the ball groove or the like even for a workpiece W having a smallest diameter. so That.

  In the above embodiment, the swing link 15 is moved so that the inclination angle of the grindstone holder 16 matches the first groove 69 to the second groove 70 between the first groove finishing process and the second groove finishing process. An angle changing step for changing the angle and a groove changing step for moving the superfinishing grindstone 41 in a direction parallel to the link member 14 so as to face the second groove 70 from the first groove 69 are provided. When the groove 69 is superfinished and when the second groove 70 is superfinished, it is not necessary to change the mounting of the workpiece W on the driving device 79. Therefore, the first groove 69 and the second groove 70 are changed. High-precision super-finishing corresponding to each other can be achieved. Further, the first groove 69 and the second groove 70 can be continuously and smoothly superfinished.

  Further, in the angle changing step, the inclination angle θ of the grindstone holder 16 is changed to be larger than the oscillation center angle α of the oscillation with respect to the first groove 69 or the second groove 70. Is larger than the oscillation center angle α of the oscillation with respect to the first groove 69 or the second groove 70, and the width in the X direction on the tip side of the pair of link members 14 is reduced even when the diameter of the workpiece W is smaller. In this state, the workpiece W can be moved smoothly in the Y direction.

  In addition, since the inclination angle θ of the grindstone holder 16 is set to be equal to or less than an addition angle (α + β) obtained by adding the oscillation rocking angle β to the oscillation rocking central angle α, the grindstone holder 16 is moved after the groove changing step. If the superfinishing grindstone 41 is pressed in the groove by moving forward in the Y direction, it is possible to move directly to the oscillation operation without adjusting the inclination angle θ of the grindstone holder 16, and the superfinishing can be made smoother. it can.

  Further, before the first groove finishing step, the grindstone holder 16 is parallel to the link member 14 in a state where the inclination angle θ of the grindstone holder 16 is set larger than the oscillation center angle α of the oscillation with respect to the first groove 69. Since the tool-in process is provided in which the grindstone holder 16 is moved into the workpiece W and the superfinishing grindstone 41 is moved to the first groove 69 side, the inner diameter of the workpiece W is larger than the length of the grindstone holder 16. Even if it is somewhat small, the superfinishing process can be performed by inserting the distal end side of the link member 14 into the workpiece W.

  In the above-described embodiment, the superfinishing apparatus moves the superfinishing unit 1 in the X direction parallel to the pair of link members 14 and the Y direction in which the superfinishing grindstone 41 is moved back and forth toward the groove of the workpiece W. 2, there is no need to change the mounting of the workpiece W on the driving device 79 between when the first groove 69 is superfinished and when the second groove 70 is superfinished. Can be easily moved from the first groove super-finishing process to the second groove super-finishing process, and the first groove 69 and the second groove 70 can be moved. High-precision super-finishing corresponding to each other can be achieved. In addition, when the first groove 69 is superfinished and when the second groove 70 is superfinished, there is no need to remount the workpiece W on the driving device 79, and the first groove 69, the second groove 70, Can make a continuous super smooth finish.

  FIGS. 16 to 18 are small-diameter angular contact ball bearing hubs in which the workpiece W has a first groove 69 and a second groove 70 having different angular directions and an inter-groove small-diameter portion 77 between the grooves. For some cases, another operation in the case of superfinishing the first groove 69 and the second groove 70 by turning the superfinishing grindstone 41 on the first groove 69 side is shown. This operation will be described with reference to the process diagrams of FIGS.

  First, as shown in FIG. 16A, the first groove 69 is disposed on the drive device 79 on the back side of the second groove 70 to mount the workpiece W, and the inclination angle θ of the grindstone holder 16 is set with respect to the first groove 69. The oscillation center angle α of the oscillation is set to be larger and the inclination angle θ of the grindstone holder 16 is equal to or less than an addition angle (α + β) obtained by adding the oscillation center angle α of the oscillation to the oscillation center angle α of the oscillation. In the set state, as shown in FIG. 16B, the grindstone holder 16 is moved in the direction parallel to the link member 14 (X direction), the grindstone holder 16 is put into the workpiece W, and the superfinishing grindstone 41 is moved to the first position. Move to the groove 69 side (tool-in process). Up to this point, the operation is the same as that shown in FIGS.

Thereafter, as shown in FIGS. 16 (c) and 16 (d), the superfinishing grindstone 41 is advanced and pressed and oscillated in the first groove 69 while driving the workpiece W, and thereafter, as shown in FIG. 17 (e). Next, the superfinishing grindstone 41 is moved backward to be slightly separated from the first groove 69 (first groove finishing step).
After the first groove finishing step, the rocking of the grindstone holder 16 is stopped so that the inclination angle of the grindstone holder 16 fits from the first groove 69 to the second groove 70 as shown in FIG. The angle of the swing link 15 is changed. In this case, the inclination angle θ of the grindstone holder 16 is set larger than the oscillation center angle α of the oscillation with respect to the second groove 70, and the inclination angle θ of the grindstone holder 16 is set to the oscillation center angle α of the oscillation. For example, the inclination angle θ of the grindstone holder 16 is set to be equal to or less than the addition angle (α + β) obtained by adding the oscillation rocking angle β, and the addition is performed by adding the oscillation rocking angle β to the oscillation rocking center angle α. The state is set to the angle (α + β). Thereafter, as shown in FIG. 17G, the superfinishing grindstone 41 is retracted from the inter-groove small diameter portion 77 (angle changing step).

Next, as shown in FIG. 17 (h), the superfinishing grindstone 41 is moved in a direction parallel to the link member 14 so as to face the second groove 70 from the first groove 69 (groove changing step).
After this, the operation is the same as that shown in FIGS. 14 and 15, and as shown in FIGS. 18 (i) and 18 (j), the superfinishing grindstone 41 is advanced and pressed into the second groove 70 while driving the workpiece W. Then, the oscillation is performed, and then the superfinishing grindstone 41 is retracted from the second groove 70 as shown in FIG. 18 (k) (second groove finishing step).

Thereafter, the rocking of the grindstone holder 16 is stopped, and the grindstone holder 16 is moved in the direction parallel to the link member 14 (X direction) as shown in FIG. (Tool out process). Thereafter, the inclination angle θ of the grindstone holder 16 is returned to 0 °.
In the above embodiment, as in the case of the embodiment of FIGS. 14 and 15, the first groove 69 and the second groove 70 can be subjected to high-precision superfinishing corresponding to each other, and the first groove When superfinishing 69 and superfinishing the second groove 70, there is no need to reattach the workpiece W to the driving device 79, and the first groove 69 and the second groove 70 are made continuous and smooth. Super finish can be made. In addition to this, in the first groove finishing step, the superfinishing grindstone 41 is advanced to press and oscillate in the first groove 69 and then retracted to slightly separate the superfinishing grindstone 41 from the first groove 69. An angle changing step is provided after the first groove finishing step. In this angle changing step, the swing link 15 is changed in angle so that the inclination angle of the grindstone holder 16 matches the second groove 70. And since it is set as the process of retracting the superfinishing grindstone 41 rather than the inter-groove small diameter part 77 after that, the work W has the first groove 69, the second groove 70, and the small-diameter angular ball bearing having the inter-groove small diameter part 77. Even so, the angle of the base end portion of the grindstone holder 16 can be changed without hitting the workpiece W, and then there is a step of retracting the superfinishing grindstone 41 rather than the inter-groove small diameter portion 77. Groove change Superfinishing grindstone 41 during the process need not contact the groove between the small-diameter portion 77.

  19 to 21 show a smaller-diameter angular contact ball bearing hub in which the workpiece W has a first groove 69 and a second groove 70 having different angular directions, and a small-diameter portion 77 between the grooves. The other operation in the case of superfinishing the first groove 69 and the second groove 70 by turning the superfinishing grindstone 41 on the two-groove 70 side is shown. This operation will be described with reference to the process diagrams of FIGS.

  First, as shown in FIG. 19A, the first groove 69 is disposed on the back side of the second groove 70 in the driving device 79 and the workpiece W is mounted. Before the first groove finishing step, the grindstone holder 16 The inclination angle (θ) is set larger than the oscillation center angle (α) of the oscillation with respect to the first groove 69, and the inclination angle θ of the grindstone holder 16 is set to the oscillation center angle α of the oscillation. In a state where the moving angle β is set to be equal to or smaller than the added angle (α + β), the grindstone holder 16 is moved in the direction parallel to the link member 14 (X direction) as shown in FIG. The grindstone holder 16 is inserted, and the superfinishing grindstone 41 is moved to the first groove 69 side (tool-in process).

Thereafter, as shown in FIGS. 19C and 19D, the superfinishing grindstone 41 is advanced and pressed and oscillated in the first groove 69 while driving the workpiece W, and thereafter, as shown in FIG. 20E. Next, the superfinishing grindstone 41 is moved backward from the first groove 69 (first groove finishing step).
Next, the rocking of the grindstone holder 16 is stopped, and the superfinishing grindstone 41 is parallel to the link member 14 so as to face the second groove 70 from the first groove 69 as shown in FIG. X direction) (groove changing step). In this case, the inclination angle θ of the grindstone holder 16 is set larger than the oscillation center angle α of the oscillation with respect to the second groove 70, and the inclination angle θ of the grindstone holder 16 is set to the oscillation center angle α of the oscillation. For example, the inclination angle θ of the grindstone holder 16 is set to be equal to or less than the addition angle (α + β) obtained by adding the oscillation rocking angle β, and the addition is performed by adding the oscillation rocking angle β to the oscillation rocking center angle α. The groove is changed with the angle (α + β) set. Up to this point, the operation is the same as that shown in FIGS.

Next, after the groove changing step shown in FIG. 20 (f), as shown in FIG. 20 (g), the superfinishing grindstone 41 is positioned closer to the second groove 70 from the position retracted from the inter-groove small diameter portion 77. And the angle of the swing link 15 is changed so that the inclination angle of the grindstone holder 16 matches the second groove 70 in the vicinity of the second groove 70 as shown in FIG. 20 (h). ).
The subsequent operations are the same as those in FIGS. 14 and 15, and as shown in FIGS. 21 (i) and 21 (j), the superfinishing grindstone 41 is advanced and pushed into the second groove 70 while driving the workpiece W. After applying and oscillating, the superfinishing grindstone 41 is retracted from the second groove 70 as shown in FIG. 21 (g) (second groove finishing step).

Thereafter, the rocking of the grindstone holder 16 is stopped, and the grindstone holder 16 is moved in the direction parallel to the link member 14 (X direction) as shown in FIG. (Tool out process). Thereafter, the inclination angle θ of the grindstone holder 16 is returned to 0 °.
In the above embodiment, as in the case of the embodiment of FIGS. 14 and 15, the first groove 69 and the second groove 70 can be subjected to high-precision superfinishing corresponding to each other, and the first groove When superfinishing 69 and superfinishing the second groove 70, there is no need to reattach the workpiece W to the driving device 79, and the first groove 69 and the second groove 70 are made continuous and smooth. Super finish can be made. In addition, similarly to the case of FIGS. 16 to 18, even if the workpiece W is an angular ball bearing having the first groove 69, the second groove 70, and the inter-groove small diameter portion 77, the base of the grindstone holder 16 is used. The angle of the end portion can be changed without colliding with the workpiece W, and the superfinishing grindstone 41 is then retracted from the small-diameter portion 77 between the grooves, so that the superfinishing grindstone 41 is changed during the groove changing step. However, it is not necessary to contact the small-diameter portion 77 between the grooves.

  In the above-described embodiment, the first groove 69 and the second groove 70 are superfinished with respect to the angular ball bearing hub in which the workpiece W has the first groove 69 and the second groove 70 having different angular directions. However, the workpiece W to which the present invention is applied is not limited to the angular ball bearings, but the ball rolling grooves, deep groove ball bearings, and thrust ball bearings provided on the rails of the linear guides. The present invention can also be applied to super finishing of the first groove 69 and the second groove 70 provided as eaves roads.

  Moreover, in the said embodiment, the 1st groove | channel 69 is arrange | positioned in the drive device 79 in the back | inner side from the 2nd groove | channel 70, the workpiece | work W is mounted | worn, and superfinishing is processed from the 1st groove | channel 69 of the back | inner side, The second groove 70 on the front side is superfinished. Instead, the work W is mounted on the driving device 79 by placing the second groove 70 on the back side of the first groove 69, and the second groove 70 on the front side is mounted. Superfinishing may be performed from the first groove 69, and then the second groove 70 on the back side may be superfinished. In this case, after the second groove finishing step, the inclination angle θ of the grindstone holder 16 is set. Is set to be larger than the oscillation center angle α of the oscillation with respect to the second groove 70, and a tool-out process of moving the grindstone holder 16 in a direction parallel to the link member 14 and taking out the grindstone holder 16 from the workpiece W is performed. What is necessary is just to provide. Thus, even when the inner diameter of the workpiece W is slightly smaller than the length of the grindstone holder 16, the tip end side of the link member 14 is smoothly brought into contact with the workpiece W from the workpiece W after the superfinishing process is performed. It can be taken out.

Moreover, in the said embodiment, although a pair of link member 14 is spaced apart from right and left, and arrange | positioned in the front-back direction, the arrangement direction of a pair of link member 14 is not limited to this, Up-down direction, left-right direction, or diagonally It may be arranged in the direction.
In the above embodiment, the parallel link mechanism of 6 nodes is constituted by the pair of parallel link members 14, the pair of swing links 15 parallel to each other, and the grindstone holder 16 parallel to the link member 14. Alternatively, one or more link members may be provided in parallel in addition to the pair of parallel link members 14, or one or more swing links in addition to the pair of swing links 15 parallel to each other. May be provided in parallel.

  Moreover, in the said embodiment, although a pair of link member 14 is linear, a pair of link member 14 may not be linear, for example, it may be bent in the shape of a crank.

DESCRIPTION OF SYMBOLS 1 Superfinishing unit 2 Movement mechanism 14 Link member 15 Oscillating link 16 Grinding stone holder 25 Oscillating shaft 31 Nipping rod 32 Nipping rod 39 Support shaft 41 Superfinishing grinding stone 42 Cylinder means 43 Cylinder 51 Bearing protrusion shaft 64 Supply flow path 65 First Communication hole 66 Second communication hole 67 Hose 69 First groove 70 Second groove 77 Small-diameter portion between grooves W Work O Oscillation center α Oscillation center angle r1 radius P1 center

Claims (11)

A pair of parallel link members (14), a pair of oscillating links (15) that are crossed and connected to the pair of link members (14), and the distal sides of the pair of link members (14) And a grindstone holder (16) parallel to the swing link (15), and the base of the pair of swing links (15) swings around the swing shaft (25) on the machine body side. Cylinder means that is pivotally supported and holds the superfinishing grindstone (41) outwardly projecting from the grindstone holder (16) and presses the superfinishing grindstone (41) toward the tip side with fluid pressure ( 42), the superfinishing grindstone (41) side of the grindstone holder (16) protrudes in parallel with the base side of the swing link (15) from the pair of link members (14),
By reciprocatingly swinging one of the pair of swing links (15) around the swing shaft (25), the grindstone holder (16) is moved around the swing center (O) on the tip side of the superfinished grindstone (41). In addition to oscillating, by changing the angle of the one oscillating link (15) about the oscillating shaft (25), the grindstone holder (16) is changed to an angle about the oscillating center (O), thereby oscillating. A super finishing unit (1) adapted to change the oscillation center angle (α),
A work (W) having a first groove (69) and a second groove (70) having different angular directions is mounted on a driving device (79), and the first groove (69) is driven while driving the work (W). A first groove finishing step in which the superfinishing grindstone (41) is advanced, pressed, oscillated, and then moved backward, and the superfinishing grindstone (41) is driven in the second groove (70) while driving the workpiece (W). Between the first groove (69) and the second groove (70) between the first groove (69) and the second groove finishing step in which the wheel is advanced, pressed and oscillated and then retracted. The angle changing step of changing the angle of the swing link (15) and the superfinishing grindstone (41) parallel to the link member (14) so as to face the second groove (70) from the first groove (69) And a groove changing process that moves in the direction Super-finishing method to butterflies.   The work (W) is an angular contact ball bearing having a first groove (69), a second groove (70), and a small-diameter portion (77) between grooves, and the first groove finishing step includes the first groove (69). The superfinishing grindstone (41) is moved forward, pressed and oscillated, and then the superfinishing grindstone (41) is retracted slightly away from the first groove (69). The angle changing step is provided after the step, and the angle changing step changes the angle of the swing link (15) so that the inclination angle of the grindstone holder (16) fits the second groove (70), and thereafter The superfinishing method according to claim 1, characterized in that the superfinishing grindstone (41) is retracted from the small-diameter portion (77) between the grooves.   The workpiece (W) is an angular ball bearing having a first groove (69), a second groove (70), and a small-diameter portion (77) between grooves, and the angle changing step is provided after the groove changing step, In this angle changing step, the superfinishing grindstone (41) is advanced from a position retracted from the inter-groove small diameter portion (77) to a position close to the second groove (70), and the grindstone is located near the second groove (70). The angle of the swing link (15) is changed so that the inclination angle of the holder (16) matches the second groove (70), and the second groove finishing step is slightly separated from the second groove (70). From this state, the superfinishing grindstone (41) is advanced to the second groove (70), pressed and oscillated, and then the superfinishing grindstone (41) is retracted from the first groove (69). The superfinishing method according to claim 1.   In the angle changing step, the inclination angle (θ) of the grindstone holder (16) is changed to be larger than the oscillation center angle (α) of oscillation with respect to the first groove (69) or the second groove (70). The superfinishing method according to any one of claims 1 to 3, wherein the superfinishing method is one.   The inclination angle (θ) of the grindstone holder (16) is set to be equal to or less than an addition angle (α + β) obtained by adding an oscillation rocking angle (β) to an oscillation rocking central angle (α). The superfinishing method according to claim 4.   The first groove (69) is arranged in the drive device (79) on the back side from the second groove (70) and the work (W) is mounted, and the grinding wheel holder (16) is inclined before the first groove finishing step. With the angle (θ) set larger than the oscillation center angle (α) of oscillation with respect to the first groove (69), the grindstone holder (16) is moved in a direction parallel to the link member (14). 6. A tool-in process is provided in which the grindstone holder (16) is placed in (W) and the superfinishing grindstone (41) is moved to the first groove (69) side. Super finishing method according to crab.   The second groove (70) is arranged in the drive device (79) on the back side from the first groove (69) and the workpiece (W) is mounted. After the second groove finishing step, the inclination angle of the grindstone holder (16) (While θ is set larger than the oscillation center angle (α) of oscillation with respect to the second groove (70), the grindstone holder (16) is moved in a direction parallel to the link member (14) to move the workpiece (W A superfinishing method according to any one of claims 2 to 5, further comprising a tool-out step of taking out the grindstone holder (16) from inside. A pair of parallel link members (14), a pair of oscillating links (15) that are crossed and connected to the pair of link members (14), and the distal sides of the pair of link members (14) And a grindstone holder (16) coupled to the swing link (15) through a support shaft (39), and the base of the pair of swing links (15) swings toward the machine body. The superfinishing grindstone (41) is supported on the grindstone holder (16) so as to protrude outward, and the superfinishing grindstone (41) is directed toward the tip side. Cylinder means (42) for pressing with pressure is incorporated, and the superfinishing grindstone (41) side of the grindstone holder (16) protrudes in parallel with the base side of the swing link (15) from the pair of link members (14),
By reciprocatingly swinging one of the pair of swing links (15) around the swing shaft (25), the grindstone holder (16) is moved around the swing center (O) on the tip side of the superfinished grindstone (41). In addition to oscillating, by changing the angle of the one oscillating link (15) about the oscillating shaft (25), the grindstone holder (16) is changed to an angle about the oscillating center (O), thereby oscillating. A super-finishing device comprising a super-finishing unit (1) in which the swing center angle is set and changed.
A moving mechanism (2) for moving the superfinishing unit (1) in the X direction parallel to the pair of link members (14) and the Y direction in which the superfinishing grindstone (41) is moved back and forth toward the groove of the workpiece (W). A super-finishing apparatus characterized by comprising:   The bearing protrusions (51) facing each other are projected from the bearing portions that support the support shaft (39) of the pair of link members (14), and the one swing link (15) is moved around the swing shaft (25). The super-finishing apparatus according to claim 8, wherein when the pair of link members (14) are largely swung, the bearing protrusions (51) of the pair of link members (14) are shifted in the X direction and mesh with each other.   A supply channel (64) for supplying fluid to the cylinder means (42) is provided on the support shaft (39) that supports the base side of the grindstone holder (16) of the pair of link members (14). The superfinishing apparatus according to claim 8 or 9, wherein   The supply flow path (64) has a first communication hole (65) that is bored in the axis of the support shaft (39) and communicates with the cylinder (43) of the cylinder means (42), and a first communication hole (65 ) And a second communication hole (66) along the outer surface of the link member (14) in an L shape, and a hose (67) for supplying fluid to the cylinder (43) is provided in the second communication hole. The superfinishing device according to claim 10, wherein the superfinishing device is connected to (66) and arranged along a longitudinal direction of the link member (14).

Images