JPH09262708A - Chuck mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chuck used for a both end cutting machine with simple mechanism wherein the chuck can clump a work in rotatable state so as to facilitate cutting both end of the work. SOLUTION: A movable body 3 can be moved toward axial direction by supplying compressed air through an air supplying tube 14 provided between a cap 13 and the movable body 3. A tapered ring 18 is urged to the axial direction by a pushing portion 4 mounted on the movable body 3 through a bearing 9. The urged tapered ring 18 urges a spherical body 5 toward a work 19 along the taper of the tapered ring 18, causing the work to be clumped. Fixing the a fixed body 1 to the rotor 2, to clamp the work 19 through bearings 10 and 11, the rotor 2 is rotated by a motor through a pulley 16 and a belt 17. Cutting tools 15 are radially moved toward the work 19 so that both end of the work 19 are cut so that the work 19 is finished in specified size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck mechanism, and more particularly to a chuck mechanism suitable for use in a double-end cutting machine.

[0002]

2. Description of the Related Art In the case of cutting both end surfaces of a cylindrical or cylindrical work, conventionally, the work is grasped by a chuck mechanism, one end is machined, and then the work is grasped and changed. The other end is processed.

[0003]

However, when the work is gripped and changed, there is a problem that it takes time for gripping and replacement, the machining efficiency is low, and the work is damaged at the time of gripping and replacement. Further, in the conventional method, when the work is removed, the center must be moved backward until the work is disengaged from the gripping member, the nut must be loosened, and then the work must be removed. It was

To solve the above problem, the present invention provides a chuck for a double-sided cutting machine having a simple mechanism that can rotate while clamping both ends of a workpiece so that it can be cut and can be easily clamped with one touch. Is what you are trying to do.

[0005]

The present invention has been made to solve the above-mentioned problems, and in particular, a rotating body having a hollow portion into which a cylindrical or cylindrical work is inserted, and the rotating body is rotated. A fixed body that supports the work body, a clamp mechanism that clamps the work in the hollow portion of the rotating body in the hollow portion of the rotating body, and a clamp mechanism that clamps the work in the hollow portion of the rotating body; A chuck mechanism of a double-end cutting machine that rotates to process both ends of the workpiece, wherein the clamp mechanism includes a plurality of spheres inside the rotating body, a belt connecting the spheres, and a portion in contact with the spheres. It has a taper and has a taper ring that can move in the axial direction. By displacing the movable body that can move in the axial direction, the taper ring is displaced, and the sphere is moved in the work direction to move the work. Ku This is a chuck for a double-sided cutting machine with a simple mechanism that allows the workpiece to be rotated while it is clamped so that it can be cut and easily clamped with one touch. Is to provide.

[0006]

FIG. 1 is a sectional view for explaining an embodiment of a chuck mechanism according to the present invention. The chuck mechanism can be roughly divided into a fixed body 1 and a rotating body 2. The work 19 is inserted into the rotating body 2. Since the chuck mechanism according to the present invention is bilaterally symmetrical, only the right half of FIG. 1 will be described below, but the left half also operates in the same manner.

In FIG. 1, the fixed body 1 has a cap 1
3 is fixed, and by supplying compressed air through the air supply pipe 14 between the cap 13 and the movable body 3,
The movable body 3 can be moved in the axial direction. At this time, the pushing portion 4 attached to the fixed body 3 via the bearing 9 pushes the taper ring 18 in the axial direction. The pushed taper ring 18 pushes the sphere 5, and the sphere 5 follows the taper of the taper ring 18
9 and clamps the work piece 19.

The rotary body 2 is fixed to the fixed body 1 via the bearings 10 and 11 while the work 19 is clamped, and the work 19 is rotated by a motor (not shown) via the pulley 16 and the belt 17. While doing so, the cutting tool 15 set at a predetermined position is moved in the radial direction of the work 19, and both ends of the work 19 are cut to finish to a predetermined size.

2A and 2B are views for explaining the operation when the work 19 is clamped. FIG. 2A shows a state when the work 19 is not clamped, and FIG. 2B shows a state when it is clamped. In this state, the sphere 5 is pushed in the direction of the workpiece 19 as described above when clamped. Therefore, as shown in FIG. The pin 6 is extended. When the compressed air is exhausted after processing, the connecting belt 20 moves in the contracting direction due to elasticity, so that the state returns to the state shown in FIG. Then, the pushing portion 4 and the movable body 3 are pushed by the spherical body 5, and the taper ring 18 returns to the original state.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment,
For example, the spherical body 5 can be made of an elastic body. When the spherical body 5 is made of an elastic body, chucking can be performed on a soft metal such as an aluminum alloy without damaging it. Further, when the taper ring 18 is provided with the taper portion 18a that pushes the sphere 5 and the pin 6 that supports the connecting belt 20 that connects the sphere 5, the mechanism for clamping and unclamping becomes a simple structure. Further, if the same number of the spherical bodies 5 are arranged on the circumference of the pin 6 and the tapered portion 18a, the shaft of the work 19 can be accurately centered with respect to the chuck shaft. Further, if the inner portion of the rotating body 2 that is in contact with the spherical body 5 is tapered 2a, the spherical body 5 is likely to move in the direction of the work 19, and clamping is performed reliably.

Further, a clearance is provided between the movable body 3 and the rotating body 2, a slide bearing 12 is provided between the movable body 3 and the cap 13, and a space between the movable body 3 and the fixed body 1 and between the movable body 3 and the movable body 3 are provided. Providing the O-rings 8 between the caps 13 reduces the leakage of compressed air, ensures the movement of the movable body, and
Can be smooth. Furthermore, when the supporter 7 having an elastic body and having a tapered or arcuate cross section is provided inside the rotating body 2, the work 19 can be smoothly inserted into the chuck without being damaged.

[0012]

According to the invention of claim 1, a rotating body having a hollow portion into which a cylindrical or cylindrical work is inserted,
A fixed body that rotatably supports the rotating body, and a state in which a work protrudes into the hollow portion of the rotating body from both ends of the hollow portion,
A clamp mechanism for clamping the work in a hollow portion of the rotating body, and a chuck mechanism of a double-end cutting machine for rotating the work together with the rotating body to process both ends of the work, the clamp mechanism comprising: Inside the rotating body, a plurality of spheres, a belt that connects the spheres, and a portion in contact with the spheres that has a taper and has a taper ring that can move in the axial direction, and move to a movable body that can move in the axial direction. By giving a displacement to the taper ring to move the sphere in the work direction and clamp the work, the simple mechanism and structure do not change the grip of the work and Both ends can be processed with one clamp without rotating, and the work can be easily attached and detached. Moreover, since the clamp moves the spherical body instead of gripping it by elastic deformation of the clamp part, the range of the diameter of the work that can be clamped is wide. Furthermore, since the clearance is large, the work can be easily inserted.

According to the invention of claim 2, in the invention of claim 1, since the spherical body is an elastic body, it is possible to chuck a soft metal such as an aluminum alloy without damaging it.

According to the invention of claim 3, in the invention of claim 1, since the belt connecting the spheres is an elastic body, the mechanism for releasing the clamp has a simple structure.

According to the invention of claim 4, in the invention of claim 1, a taper portion for pushing a spherical body on the taper ring,
Since it has a pin for supporting the belt that connects the spheres, the mechanism for clamping and unclamping has a simple structure.

According to the invention of claim 5, in the invention of claim 4, since the taper portion and the pins are arranged in the same number on the circumference in the same number as the spheres, the centering of the shaft of the work with respect to the shaft of the chuck is performed. Can be done accurately.

According to the invention of claim 6, in the invention of claim 1, since the portion of the inside of the rotating body which is in contact with the spherical body is tapered, the spherical body can be easily moved in the direction of the work, and the clamp can be reliably carried out. Done.

According to the invention of claim 7, in the invention of claim 1, there is a space in the circumferential direction between the axially displaceable movable body and the cap fixed to the fixed body,
By supplying air to the space, the movable body is displaced in the axial direction, so that the piston movement by the air can be performed without using a machine such as an air cylinder. Therefore, the structure is simplified and the chuck itself It can be made compact. In addition, it can be clamped without human intervention, which facilitates automation. Furthermore, since factory air is used, no special work is required.

According to the invention of claim 8, in the invention of claim 7, a clearance is provided between the movable body and the rotating body, and a slide bearing is provided between the movable body and the cap.
Since the O-rings are provided between the movable body and the fixed body and between the movable body and the cap, it is possible to reduce the leakage of compressed air and to surely and smoothly move the movable body.

According to a ninth aspect of the present invention, in the first aspect of the present invention, since a supporter having an elastic body and having a tapered or arcuate cross section is provided inside the rotating body, the chuck can be smoothly chucked without damaging the work. Can be inserted.

[Brief description of drawings]

FIG. 1 is a sectional view for explaining an embodiment of a chuck mechanism according to the present invention.

FIG. 2 is a diagram for explaining the operation of the clamp mechanism used in the chuck mechanism according to the present invention.

[Explanation of symbols]

1 ... Fixed body, 2 ... Rotating body, 3 ... Movable body, 4 ... Pushing member,
5 ... Sphere, 6 ... Pin, 7 ... Supporter, 8 ... O-ring,
9, 10, 11 ... Bearings, 12 ... Sliding bearings, 13 ...
Cap, 14 ... Air supply pipe, 15 ... Bit, 16 ...
Pulley, 17 ... Belt, 18 ... Taper ring, 19 ... Work, 20 ... Connection belt.

Claims (10)

[Claims] 1. A rotating body having a hollow portion into which a cylindrical or cylindrical work is inserted, a fixed body for rotatably supporting the rotating body, and a work in the hollow portion of the rotating body from both ends of the hollow portion. A clamping mechanism for clamping the work in a hollow portion of the rotating body in a protruding state, and a chuck mechanism of a double-end cutting machine for rotating the work together with the rotating body to process both ends of the work, The clamp mechanism is
A plurality of spheres and a belt connecting the spheres inside the rotating body, a portion in contact with the spheres having a taper, and a taper ring movable in the axial direction, and a movable body movable in the axial direction. A chuck mechanism characterized in that a taper ring is displaced by applying a displacement to move a spherical body in the direction of the workpiece to clamp the workpiece. 2. The chuck mechanism according to claim 1, wherein the spherical body is an elastic body. 3. The chuck mechanism according to claim 1, wherein the belt connecting the spheres is an elastic body. 4. The chuck mechanism according to claim 1, wherein the taper ring has a taper portion that pushes a sphere, and a pin that supports a belt that connects the spheres. 5. The chuck mechanism according to claim 4, wherein the tapered portion and the pins are arranged on the circumference in the same number as the spheres. 6. The chuck mechanism according to claim 1, wherein a portion of the inside of the rotating body which is in contact with the spherical body is tapered. 7. The space according to claim 1, wherein a space is provided in the circumferential direction between the movable body that is displaceable in the axial direction and the cap that is fixed to the fixed body, and air is supplied to the space. A chuck mechanism for applying an axial displacement to the movable body. 8. A clearance is provided between the movable body and the rotating body, a slide bearing is provided between the movable body and the cap, and between the movable body and the fixed body, and A chuck mechanism having O-rings between a movable body and a cap. 9. The chuck mechanism according to claim 1, wherein a supporter having an elastic body and having a tapered or arcuate cross section is provided inside the rotating body. 10. The chuck mechanism according to claim 1, wherein the clamp mechanism is provided on both sides of the chuck.