JPS6149072B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a honing device for machining a non-circular peripheral surface such as the inner peripheral surface of a rotary compressor housing.

Conventionally, in this type of honing device, a honing stone attached to a tool shaft so as to be movable in the radial direction is brought into pressure contact with the periphery of the non-circular machining workpiece by a grindstone pressurizing cylinder, while the honing stone is attached to the tool shaft in an axial direction. The reciprocating motion and the rotational motion are performed to cause the honing stone to perform a spiral motion, thereby honing the non-circular shaped peripheral surface.

However, in the above-mentioned honing device, the piston rod of the whetstone pressure cylinder protrudes and retracts at the minor and major diameters of the non-circular machining circumferential surface of the workpiece, so the surface pressure between the honing whetstone and the machining circumferential surface is not uniform. This has the disadvantage that unreasonable force is applied to the machined peripheral surface, resulting in poor shape and accuracy of the machined surface. Furthermore, since the piston rod of the grindstone pressurizing cylinder moves in and out, the rotational speed of the tool shaft cannot be increased, resulting in poor machining efficiency.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks by moving a grindstone pressure cylinder synchronously to the non-circular machining circumferential surface of a workpiece, and to This eliminates the protrusion and retraction of the piston rod of the whetstone pressurizing cylinder due to the non-circular shape, and enables honing with excellent shape and precision using uniform contact pressure.Moreover, the tool axis can be rotated at high speed, improving machining efficiency. An object of the present invention is to provide a honing device.

In order to achieve the above object, the structure and operation of the present invention provide a tool that performs reciprocating motion in an axial direction perpendicular to a base on which a workpiece having a non-circular machining peripheral surface is mounted, and rotational motion around the axis. a shaft, a holding member into which the tool shaft is rotatably inserted and capable of reciprocating motion following the reciprocating motion of the tool shaft in the axial direction, and a honing stone support that supports the honing stone on the tool shaft; The tool shaft is supported movably in the radial direction within a plane passing through the axis of the tool shaft, and the tool shaft has a reference peripheral surface corresponding to the finished shape of the processed peripheral surface, and the holding member A tene plate that is integrally attached and is provided on the base to restrict the rotation of the holding member around the axis of the tool shaft, and is capable of reciprocating movement following the reciprocating movement of the tool shaft in the axial direction. A guide member that guides the honing wheel, and a guide member having a follower that moves along the template is movably supported in the same direction as the honing wheel support, and between the guide member and the honing wheel support, By providing a grinding wheel pressure cylinder that presses the follower to the tene plate and the honing whetstone to the workpiece, the grinding wheel pressure cylinder can be moved following the tene plate, and the grinding wheel can be removed due to the non-circular shape of the machining peripheral surface. By eliminating the protrusion and retraction of the piston rod of the pressure cylinder, the honing stone can be brought into contact with a substantially uniform surface pressure to improve the shape and precision of honing, and the tool axis can be rotated at high speed to improve machining efficiency. It is characterized by the fact that

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

In Figs. 1 and 2, 1 is a frame as a guide member, 2 is a base attached to the frame 1, and 3 is a non-circular shaped piece clamped onto the base 2 by a clamping device 4 and positioned with a knock pin 8. A workpiece having an inner circumferential surface 3a, 5 is a tool shaft that performs reciprocating motion in the axial direction perpendicular to the base 2, that is, in the vertical direction and rotational motion around the axis. A bush 7 as a member is rotatably mounted via bearings 6, 6, and is mounted so that it cannot move relative to the axial direction between the stepped portion 5a and the flange 9, and the bush 7 is reciprocated in the vertical direction together with the tool shaft 5. I try to let them do it.

At the bottom of the bush 7, attach the upper plate 11 to the bolt 1.
2 and 12, and upper portions 14a, 14a of guide bars 14, 14 extending in the vertical direction are fitted to both ends of the upper plate 11, and are secured by tightening with nuts 15, 15. The above guide bar 4, 14
The upper parts 14a, 14a of the frame 1 are connected to the guide hole 1.
a, 1a so as to be vertically movable, and the lower parts 14b, 14b are fitted to the bushes 1 provided on the base 2.
7, 17 so as to be vertically movable, and step portions 14c, 14c provided on the lower portions 14b, 14b.
A tene plate 21 having a reference outer circumferential surface 21a corresponding to the finished shape of the processed circumferential surface 3a is fixed with nuts 22, 22. Therefore, the tene plate 21 reciprocates in the vertical direction together with the tool shaft 5 via the guide bars 14, 14, the upper plate 11, and the bush 7.
Rotational movement is prevented by the action of A through hole 21b is provided in the center of the above-mentioned tape plate 21.

On the other hand, a forked radial protrusion 25, 25 is formed in a portion below the upper plate 11 of the tool shaft 5, and a lever-shaped honing stone support is formed between the protrusion 25, 25. 26, the top of 26 with pin 2
7 and 27, the honing wheels 28 and 28 are hung so as to be swingable in the radial direction in a plane passing through the axis of the tool shaft 5, while pins 29 and 29 are attached to the lower portions of the honing stone supports 26 and 26 with the honing stones 28 and 28 facing outward. It is attached so that it can swing freely.

Further, between the forked protrusions 25, 25, the upper part of the crank handle-shaped guide bodies 31, 31 is connected to the honing stone support 26 with pins 32, 32.
, that is, within a plane passing through the axis of the tool shaft 5, so as to be swingable in the radial direction. At the lower end of the guide body 31, a follower 33 is provided which comes into contact with the reference outer circumferential surface 21a of the tape plate 21.

Further, a grindstone pressure cylinder 35 is provided in a substantially horizontal direction in the step-shaped central portion 31a of the guide body 31. That is, the grindstone pressure cylinder 35
The cylinder tube 36 is formed by the central portion 31a of the guide body 31. The tip of a piston rod 38 connected to a piston 37 that is slidably fitted into the cylinder tube 36 is loosely fitted into a hole 41 provided in the center of the honing stone support 26 . It is connected to the honing whetstone support 26 by a pin 43 that fits into a vertical elongated hole 42 provided. A predetermined hydraulic pressure is transmitted to the chamber 45 on the piston rod 38 side of the whetstone pressurizing cylinder 35 to urge the piston rod 38 toward the retracted side, and the honing whetstone support 26 and guide body 31 are pulled together, The follower 33 is pressed against the reference outer peripheral surface 21a of the template 21, and the honing wheel 28 is pressed against the processed inner peripheral surface 3a of the workpiece 3.

Further, a switching valve 47 is provided adjacent to the chamber 46 on the side opposite to the piston rod of the grindstone processing cylinder 35, and the outer protruding end 48a of the spool 48 of this switching valve 47 is connected to the inner circumferential surface 3a of the workpiece 3. At a predetermined rotational position of the tool shaft 5 corresponding to a notch in a port (not shown), the tool shaft 5 is brought into contact with the dog 51 shown in FIG.
Moving the spool 48 inward in FIG. 1,
Hydraulic oil is guided from the port 52 through the passage 53 to the chamber 46 on the side opposite to the piston rod, thereby weakening the biasing force on the retracting side of the piston rod 38, thereby weakening the pressing force of the honing stone 3 against the workpiece 3.

Spool 48 and piston 37 of the switching valve 47
A spring 55 is compressed between the spool 48 and the spool 48, and the spool 48 is always urged outward.
At a rotational position where the protruding end 48a of the spool 48 does not come into contact with the piston rod, hydraulic pressure is not introduced into the chamber 46 on the side opposite to the piston rod. Hydraulic oil is supplied to or discharged from the grindstone pressure cylinder 35 and the switching valve 47 through a passage (not shown) provided in the bush 7 and the tool shaft 5 and a flexible hose.

In addition, 61 is a coil spring stretched between the guide bodies 31, 31, and the guide body 3
1 and 31 inward to bring the follower 33 into contact with the reference outer circumferential surface 21a of the tape plate 21 to determine the rest position.

Further, 62 is a forked protrusion provided on the tool shaft 5 in order to guide the center portions of the guide bodies 31, 31 and the honing stone supports 26, 26 in the radial direction of the tool shaft 5.

Further, 63 is a guide shaft coaxially connected to the lower end of the tool shaft 5, and a bush 65 fixed to the base 2.
The tool shaft 5 is slidably fitted to support the tool shaft 5 in the radial direction.

In the honing device having the above configuration, the tool shaft 5
When the honing stone support 2 performs reciprocating motion in the axial direction and rotational motion around the axis, the honing stone support 2
6 and the guide body 31 also perform reciprocating motion and rotational motion.
On the other hand, at this time, the tene plate 21, together with the bush 7, the upper plate 11, and the guide shafts 14,
It only reciprocates in the axial direction in synchronization with the tool axis 5. In this state, the grindstone pressure cylinder 35
The honing wheel support 26 and the guide body 31 are drawn together. For this reason, the guide body 3
The followers 33, 33 at the lower ends of the base plates 1, 31 are pressed against the reference outer circumferential surface 21a of the template 21, and move while rotating around the reference outer circumferential surface 21a. Therefore, the guide body 31, the whetstone pressure cylinder 35, the honing whetstone support 26, and the honing whetstone 28 follow the standard outer circumferential surface 21a of the tene plate 21 corresponding to the finished shape of the processed inner circumferential surface 3a of the workpiece 3. Since it moves in the radial direction, the piston rod 38 of the grinding wheel pressure cylinder 35 does not move in or out at the long diameter and short diameter parts of the inner circumferential surface 3a, and the honing wheel 28 is moved within the processing with uniform surface pressure. Since it is brought into contact with the circumferential surface 3a, no unreasonable force is applied, and the finished shape and accuracy of the processed inner circumferential surface 3a are improved.

Furthermore, since the piston rod 38 of the grindstone pressurizing cylinder 35 does not protrude or retract in this way, the rotational speed of the tool shaft 5 can be increased and machining efficiency can be increased.

Also, during this honing process, the followers 33, 33 do not move relative to the template 21 in the axial direction of the tool shaft 5.
There is little wear on the reference outer circumferential surface 21a and the followers 33, 33.

Although the above embodiment is for machining the inner circumferential surface 3a of the workpiece 3, the present invention can also be applied to a honing device for machining the outer circumferential surface of the workpiece. Furthermore, the number of honing stone supports and honing stones is not limited to two, but may be any number.

As is clear from the above description, the honing device of the present invention performs reciprocating motion in the axial direction perpendicular to the base on which the workpiece having a non-circular peripheral surface is mounted, and rotational motion around the axis. A honing stone support for supporting a honing stone is supported on the tool shaft so as to be movable in the radial direction within a plane passing through the axis of the tool shaft,
A guide body having a follower that moves following a tene plate having a reference peripheral surface corresponding to the finished shape of the processed peripheral surface is supported on the tool shaft so as to be movable in the same direction as the honing wheel support. On the other hand, a grindstone pressure cylinder is provided between the guide body and the honing stone support body, which presses the follower against the tene plate and the honing whetstone against the workpiece. This eliminates the protrusion and retraction of the piston rod of the whetstone pressure cylinder caused by the non-circular shape of the machining peripheral surface, which improves the finished shape and accuracy of honing machining, and increases machining efficiency by increasing the rotation speed of the tool axis. You can improve.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of one embodiment of the present invention, Fig.
The figure is a plan view of the above embodiment. 1... Frame (guide member), 2... Base,
3...Workpiece, 5...Tool shaft, 7...Button (holding member), 26...Honing stone support, 2
1... Tene plate, 28... Honing grindstone, 31... Guide body, 33... Follower, 35
...Whetstone pressure cylinder.

Claims (1)

[Scope of Claims] 1. A honing device for machining a non-circular circumferential surface of a workpiece while imparting rotational motion and reciprocating motion to a grindstone, comprising: a base on which a workpiece having a non-circular circumferential surface is mounted; , a tool shaft that is reciprocated in an axial direction perpendicular to the base and rotationally driven around the axis; and a tool shaft that is rotatably inserted and driven to rotate the tool shaft in the axial direction. a holding member capable of reciprocating movement following the workpiece; a tene plate having a peripheral surface serving as a reference corresponding to the finished shape of the workpiece and integrally attached to the holding member; provided on the base; a guide member that restricts the rotation of the holding member about the axis of the tool shaft and guides the tool shaft so that it can reciprocate by following the reciprocating motion of the tool shaft in the axial direction; A honing stone support supported movably in the radial direction with respect to the tool axis in a plane passing through the honing stone support, a honing stone attached to the honing stone support, and a follower that moves following the above-mentioned tene plate are provided. , and a guide body supported on the tool shaft so as to be movable in the same direction as the honing stone support; and a guide body provided between the guide body and the honing stone support body, the follower is used as a tene plate, and the honing stone is used as a workpiece. A honing device characterized by comprising a grindstone pressurizing cylinder that is brought into pressure contact with the honing device.