JPH074119Y2 - Work support device for machine tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a work supporting device in a machine tool for machining an envelope surface connecting two inclined holes of a work.

(Prior Art) Conventionally, various mechanical parts having two inclined holes in which two holes having different inclination angles are provided at the same position have been used. For example, Japanese Patent Laid-Open No. 63-205470 discloses the use of a swash plate having two inclined holes in a swash plate type variable displacement compressor.

On the other hand, as a machine tool for grinding / polishing a hole in a work, a work holder such as a chuck for fixing the work and a grinding drill or the like provided so as to be movable in and out of contact with the holder are added. Those comprising tools are generally well known.

(Problems to be solved by the invention) However, when a workpiece having the above-mentioned two inclined holes is machined by using the hole machining machine tool, each inclined hole of the workpiece is processed by the inclined hole. The work had to be fixed with the tool facing the processing tool, and the work was troublesome. Further, when processing the envelope surface connecting the two inclined holes of the two inclined holes, it is necessary to change the orientation of the work piece many times, and the work is more troublesome, and moreover, sufficient processing accuracy is required. The reality is that we cannot get it.

The present invention has been made in view of the above points, and an object of the present invention is to provide a movable tool suitable for machining a work having two inclined holes, particularly in a supporting device for holding the work among the machine tools for hole machining. By using the mechanism, it is possible to simplify the machining work and improve the machining accuracy.

(Means for Solving the Problem) In order to achieve the above object, a solution means of the present invention is as a device for supporting a work in a machine tool for processing an envelope surface connecting two inclined holes of a work, It is connected to a rotary shaft that is driven to rotate by a motor and is integrated with the rotary shaft.
It has a support device main body which is provided so as to be rotatable by 0 °, and a support shaft which projects outward in a direction perpendicular to the rotation axis of the support device main body, and is supported by being connected to the support device main body via the support shaft. A work holding body that is swingably supported around an axis and a rack and pinion mechanism that swings the work holding body around the support shaft, and the rack member of the mechanism is moved by a predetermined distance to hold the work holding body. And a swinging device for swinging the body within the range of the tilt angles of the two tilted holes of the work.

(Operation) With the above configuration, in the present invention, when the envelope surface of the two inclined holes of the work is machined, first, the work holder is held by the swinging device, and the work holding tool is held by the work holder. It is rocked so as to move from the state of being located in one of the inclined holes to the other of the inclined holes. Then, the one envelope surface with which the processing tool is in contact is processed by the processing tool. Then, the support device main body is turned 180 ° by the operation of the motor, and the other envelope side of the work is brought close to the processing tool. After that, when the work holder is swung again by the swing device, the other envelope surface is processed by the processing tool.

In addition, when processing both inclined holes before processing the envelope surface of the two inclined holes of the workpiece, the workpiece is held by the workpiece holder, one inclined hole is processed by the processing tool, and then,
By simply rocking the work holder by the rocking device, the machining of the other inclined hole can be continuously performed.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show a supporting device A for a work according to an embodiment of the present invention. The supporting device A is a work having two inclined holes (specifically, a swash plate of a swash plate type variable displacement compressor). )
It is provided for a machine tool that grinds the inner surface of each inclined hole of W and the envelope surface connecting both inclined holes.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a support device main body, which is not shown but is connected to a rotary shaft that is a rotary member that is rotationally driven by a motor. It is provided so as to be capable of turning 180 ° around the central axis 1 which is the axis thereof integrally with. Reference numeral 2 denotes a support shaft 3 which is provided on the support device main body 1 in a direction perpendicular to the rotation axis (central axis) 1 thereof.
It is a work holder supported through.

The work holder 2 is swingably supported by a pair of support shafts 3 (only one of which is shown) and a bearing 4 protruding outwardly with respect to the support device main body 1 with the support shaft 3 as a swing shaft. And a first member 6 on which an annular cylinder 5 is formed
An annular piston 7 is integrally formed on the peripheral portion, the second member 8 is provided by inserting the piston 7 into the cylinder 5 so as to be swingable, and a through hole at the center of the first member 6. 9
A collet chuck 11 connected to the second member 8 via a bolt 10 in a state of being inserted into
Is provided on the outer periphery of the tip side of the workpiece, is fixed to the first member 6, and has a backing material 12 that supports the peripheral portion of the work W. The piston 7 is biased by a spring 13 so as to move in the cylinder 5 in a direction in which the first member 6 and the second member 8 are relatively separated from each other. Compressed air from an air source 14 such as a compressor is supplied to the chamber 5a via a switching valve 15. Further, the inner surface of the through hole 9 of the first member 6 is formed into a tapered surface 9a whose diameter increases toward the front, and the outer peripheral surface of the collet chuck 11 is in contact with the tapered surface 9a. Then, when the switching valve 15 is switched to the discharge position and the compressed air in the air chamber 5a is drained, the second member 8 is separated from the first member 6 integrally with the piston 7 by the urging force of the spring 13. Direction (left side in the figure) to move through the through hole 9 of the first member 6.
Collet chuck 11 due to drawing action by taper surface 9a of 11
Is configured to clamp a work W that is supported in contact with the backing material 12, and the clamping of the work W is released by switching the switching valve 15 from the discharge position to the inflow position.

A pinion gear 16 is provided on the one support shaft 3, and the pinion gear 16 meshes with a pair of rack members 17 and 17 arranged so as to be sandwiched in a direction perpendicular to the shaft and from both sides. The rack members 17 and 17 are slidably fitted in the rack housing portions 18 and 18 formed in the support device main body 1, respectively. This rack member 17, 17 and the pinion gear 16
A rack and pinion mechanism 25 for swinging the work holder 2 around the swing shaft 3 is constituted by.

Further, in the support device main body 1, contact is made with the peripheral portion of the first member 6 of the work holder 2 at both portions of the work holder 2 in the direction perpendicular to the swing axis (that is, the support shaft 3). Stopper members 19 and 20 for restricting the swing of the work holder 2 are provided. The one stopper member 19 is in the form of a chip and is fixed to the end surface of the supporting device body 1. The other stopper member 20 is a rod-shaped member, and the supporting device body 1
The stopper accommodating portion 21 is slidably inserted into the stopper accommodating portion 21 formed on the upper end of the workpiece holder 2 and is in contact with the pad material 22 provided on the first member 6 of the workpiece holder 2 at the position of the tip end surface of the stopper member 20. The cylinder device 23 is slidably provided via a cam member 24 so as to be adjustable in the vicinity of the opening.

Here, the rocking restriction of the work holding body 2 by the both stopper members 19 and 20 is provided corresponding to the tilt angles of the two tilt holes of the work W. That is, in the work W, as shown in detail in FIGS. 4 and 5, one of the two inclined holes h1 has a relatively large angle θ1 with respect to the center line l2, and the other inclined hole h2 has two inclined holes h2. They are provided so as to be inclined at a small angle θ2. An inclined hole h1 with a large inclination angle of this work W
Corresponding to the above, the swinging restriction of the work holding body 2 by the stopper member 19 is performed at a large angle θ1, and the swinging restriction of the work holding body 2 by the stopper 20 is small corresponding to the tilted hole h2 having a small tilt angle. It is performed when the angle is θ2. In addition, the stopper member 20 is swingably provided in the stopper accommodating portion 21 of the support device main body 1, and the contact position between the tip end surface of the stopper member 20 and the first member 6 (abutting member 22) of the workpiece holder 2, that is, The swinging regulation position of the work holder 2 can be adjusted in the case of the swash plate type variable displacement compressor in order to cope with the use of various swash plates W having different inclination angles θ2 of the inclined holes h2.

FIG. 3 shows a hydraulic circuit for operating the rack and pinion mechanism 25 and the cylinder device 23. In the figure, 31 is a hydraulic pump, 32 is a rack storage part from the pump 31.
A first switching valve for switching the supply and discharge of hydraulic pressure to and from the hydraulic chambers 18a, 18a of 18, 18 by switching the switching valve 32,
Supplying pressure oil to one hydraulic chamber 18a and discharging the pressure oil from the other hydraulic chamber 18a to move the pair of rack members 17, 17 in opposite directions in the respective rack storage portions 18, 18. This causes the pinion gear 16 to rotate. Further, 33 is a second switching valve for switching the supply and discharge of the pressure oil from the pump 31 to the pair of hydraulic chambers 23b, 23c defined by the piston 23a of the cylinder device 23, and by switching the switching valve 33, By supplying pressure oil to one hydraulic chamber 23b and discharging pressure oil from the other hydraulic chamber 23c, the stopper member 20 can be moved in the direction in which its tip end surface protrudes from the stopper accommodating portion 21. By reversing the supply and discharge states of the pressure oil to and from the hydraulic chambers 23b and 23c, the stopper member 20 can be moved in the direction in which the tip end surface of the stopper member 20 is retracted into the stopper accommodating portion 21. Reference numeral 34 is a flow rate adjusting valve provided in the drain passage, and 35 is a reservoir tank. With such a hydraulic circuit, and the rack and pinion mechanism 25 and the stopper members 19 and 20 shown in FIGS. 1 and 2, the tilted ranges h of the two tilted holes h of the work W of the work holder 2 (θ1 to θ1
An oscillating device 41 that oscillates around the support shaft 3 at θ2) is configured.

Next, a work procedure for grinding the inner surfaces of the inclined holes h1 and h2 of the work W and the envelope surfaces h3 and h4 by using the supporting device A of the above embodiment will be described.

First, in a state in which the supporting device main body 1 is positioned and stopped at a predetermined position, the periphery of the work W is brought into contact with and supported by the backing material 12 of the work holding body 2, and the work W is collet chucked.
After fitting in 11, the switching valve 15 is switched to the discharge position and the work W is clamped by the collet chuck 11. After that, the first switching valve 32 in the swinging device 41 is switched to rotate the work holding body 2 to a position where rotation is restricted by the stopper member 20. When this rotation is completed, the work W held by the work holder 2 (collet chuck 11)
The center line of the inclined hole h2 of the support device main body 1 coincides with the center axis 1 of the supporting device main body 1.
The grinding wheel D provided on the extension line of is moved to the work W side, and the inner surface of the inclined hole h2 of the work W is ground. The stopper member 20 has an inclination angle θ2 of the inclined hole h2 of the workpiece W to be processed.
Accordingly, the position of the tip end surface (contact surface with the work holder 20) is adjusted in advance by the operation of the cylinder device 23.

Subsequently, after the grinding wheel D is once separated from the work W,
The support device body 1 is rotated 180 °, and the work holder 2
Is rotated to a position where rotation is restricted by the stopper member 19 (state indicated by imaginary line in FIG. 1). When this rotation is completed, the center line of the inclined hole h1 of the work W is located at the support device body 1
The grinding wheel D is moved to the work W side in this state, and the inner surface of the inclined hole h1 of the work W is ground.

Thereafter, the work holding body 2 is rotated from the state in which it abuts against the stopper member 19 to the state in which it abuts against the stopper member 20 while the grinding wheel D is still inserted into the inclined hole h1 of the work W. At this time, one envelope surface h3 of the two inclined holes h with which the grinding wheel D abuts is creep feed ground by the grinding wheel D.

Next, after rotating the supporting device body 1 again by 180 °, the work holding body 2 is rotated from the state of contacting the stopper member 20 to the state of contacting the stopper member 19, whereby
The other envelope surface h4 of the work W is subjected to creep feed grinding. After that, the grinding wheel D is separated from the work W, and the switching valve
15 is switched to the feeding position to release the holding state of the work W by the work holding body 2 (collet chuck 11),
Take out. With the above, a series of grinding work for the work W is completed.

As described above, when the work W is ground by using the supporting apparatus A of the present embodiment, the work W is reciprocated around the spindle 3 of the work holder 2 while holding the work W. The turning or swinging and the 180 ° turning of the supporting device main body 1 are automatically performed, and the entire inner peripheral surface of the two inclined surfaces h of the work W, that is, the inner surface of each inclined surface h1 and h2 and the envelope surfaces h3 and h4 are continuous. Therefore, the grinding work can be simplified and speeded up, and the grinding accuracy can be improved by creep feed grinding on the envelope surfaces h3 and h4.

In the above embodiment, the invention is applied to the work supporting device A used for a machine tool for grinding the entire inner peripheral surface of the two inclined holes h of the swash plate W of the swash plate type variable displacement compressor. However, in addition to the supporting device A, it is needless to say that the present invention can be similarly applied to a supporting device for a work in various other machine tools that machine at least the envelope surface of a work having two inclined holes.

(Effect of the Invention) As described above, according to the work supporting device in the machine tool of the present invention, the work is fixed as before by the swinging of the work holding body for holding the work and the 180 ° turning of the supporting device main body. Since each of the envelope surfaces of the two inclined surfaces can be continuously performed without repeating the work, the working work can be simplified and speeded up, and the working accuracy can be improved.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a vertical side view, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a hydraulic circuit diagram. is there. FIG. 4 is a plan view of the work (swash plate), and FIG. 5 is a sectional view taken along line VV of FIG. A ... Supporting device W ... Work h ... 2 Inclined holes h3, h4 ... Envelope 1 ... Supporting device body 2 ... Work holding body 3 ... Spindle (swing shaft) 17 ... Rack member 25 ...... Rack & pinion mechanism 41 …… Swing device

Claims (1)

[Scope of utility model registration request] 1. A support device for a work in a machine tool for machining an envelope surface connecting two inclined holes of a work, wherein the device is connected to a rotary shaft which is rotationally driven by a motor. It has a support device main body that is integrally rotatable 180 ° and a support shaft that projects outward in a direction perpendicular to the rotation axis of the support device main body, and is connected to the support device main body through the support shaft. And a rack-and-pinion mechanism for swinging the work holder around the support shaft, the work holder being supported so as to be swingable around the support shaft, and the rack member of the mechanism is moved by a predetermined distance. A device for supporting a work in a machine tool, comprising: a rocking device that rocks the work holder within a tilt angle range of two tilt holes of the work.