JPH08197312A - Chuck mechanism - Google Patents

Abstract

PURPOSE: To provide a chuck mechanism for both ends cutting devices, which is capable of rotating in state where a work is clamped so that it can be cut, and of clamping the work easily in a single operation. CONSTITUTION: A chuck mechanism is mainly formed of a rotational body 3 having a hollow part into which a columnar work 4 is inserted, and a fixing body 2 for rotatably supporting the rotational body 3. The work 4 is inserted into the hollow part of the rotational body 3 in state where the work 4 is protruded from both ends of the hollow part, that is, so that both end faces of the work 4 can be cut. When air cylinders 13 are operated, bearings 15 push the inclined faces 11a of lever-type claws 11 to rotate them lever-type claws 11 around spindles 12 to push movable sleeves 9 against fixed sleeves 8. Between both the sleeves, ring-like elastic bodies 10 are interposed, and when the sleeves 9 are pushed, the elastic bodies 10 swell to hold and clamp the work 4. The rotational body 3 is rotated through a pulley 6, and a belt 7 in order for both ends of the work 4 to be cut by cutting tools 30.

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 cutting mechanism for machining both side ends of a columnar (including hollow body) object (workpiece) without changing the gripping of the workpiece. The present invention relates to a supportable chuck mechanism.

[0002]

2. Description of the Related Art Conventionally, when cutting both end surfaces of a cylindrical work (including a cylindrical body), the work is conventionally grasped by a chuck mechanism, and after machining one end face, the work is grasped. Instead, that is, after inverting and gripping the end of the work, the other end surface is processed.

FIG. 5 is a schematic configuration diagram for explaining an example of a conventional technique for processing both end faces of a cylindrical body (workpiece). In the figure, 40 is a lathe, 41 is a center, 42 is a base shaft, 4
3 is a fixed sleeve fixed to one end of the base shaft 42,
Reference numeral 44 is a movable sleeve that can move in the axial direction on the base shaft 42, 45 is an O-ring interposed between the sleeves, 46 is a nut, and 50 is a cylindrical body (workpiece). The grip member composed of the nut 46 is attached to the cylindrical body 50.
Inserted into the inside, tighten the nut 46 to bulge the O-ring 45 in the radial direction, grasp the work 50, and in this state, attach it to the lathe to process one end surface of the work, and then work 5
It is designed such that 0 is grasped again and the other end face is machined.

[0004]

However, as described above, when the work is re-gripped, there is a problem that the re-gripping requires a long time, the machining efficiency is poor, and the work is damaged at the time of re-gripping. . Also, when re-gripping the work or removing the work, the center must be moved backward until the work comes off the gripping member, the nut must be loosened by hand, and then the work must be removed. There is a problem of this. The present invention has been made in view of the above circumstances, and in particular, a chuck mechanism for a double-end cutting machine that can rotate in a state where both ends of a work are clamped so that they can be cut and that can be easily clamped with one touch. It is made for the purpose of providing.

[0005]

In order to solve the above problems, the present invention provides (1) a rotating body having a hollow portion into which a cylindrical work is injected, and a fixed member for rotatably supporting the rotating body. A body, a clamping 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-sided cutting machine for processing both ends of the rotary body, wherein the clamp mechanism has a ring-shaped fixed clamp sleeve coaxial with the hollow portion outside the hollow portion of the rotating body, and The movable sleeve includes a plurality of movable sleeves that can be displaced in the axial direction, a ring-shaped elastic body interposed between the sleeves, and a clamp mechanism that displaces the movable sleeves. Is moved in the axial direction to press the elastic body, and the elastic body is deformed in the radial direction to clamp the work. Further, (2) at an equal angle in the circumferential direction of the fixed body. A plurality of air cylinders provided, and a plurality of levers corresponding to each of the cylinders, rotatably supported on an axis orthogonal to the axis of the rotating body and having an inclined surface in the axial direction of the rotating body. A movable claw having a movable claw, and the movable rod is displaced by rotating the lever claw with the operating rod of the air cylinder; and (3) the operating rod of the air cylinder and the lever. A bearing is provided between the fixed claw and the movable claw, and the inclined surface of the lever claw is pressed through the bearing; and (4) the fixed body and the rotating body are combined via the bearing, Through the pulley fixed to the rotating body, the rotating body Further, it is rotated by a belt, and further, (5) a rotating body having a hollow portion into which a cylindrical work is injected, a fixed body rotatably supporting the rotating body, and a hollow portion of the rotating body. A clamping mechanism that clamps the work in the hollow part of the rotating body in a state where the work protrudes from both ends of the hollow part, and a chuck of a double-end cutting machine that rotates the work together with the rotating part to process both ends of the work. The chuck mechanism comprises a plurality of air cylinders provided at equal angles in the circumferential direction of the fixed body, and a rotating shaft corresponding to each of the air cylinders and orthogonal to the axis of the rotating body. A plurality of lever type pawls movably supported and having an inclined surface in the axial direction of the rotating body,
A pad of an elastic body provided at the tip of the lever type pawl, and the operating rod of the air cylinder pushes the inclined surface of the lever type pawl to rotate the lever type pawl to work the pad. (6) An O-ring or a spring is provided on the opposite side of the pad with respect to the rotation axis of the lever type pawl, and the lever type pawl is provided by the O-ring or spring. Is pressed in a direction in which the pad separates from the work, and (7) the side of the lever type claw facing the work has a small diameter on the side of the pad,
Having a tapered rib whose diameter increases on the phosphorus or spring side, further, (8) having the clamp mechanism at both ends of the rotating shaft, and (9) having an elastic body at the inner center of the rotating body. In addition, the present invention is characterized by having a cylindrical supporter having a tapered or arcuate axial cross section whose diameter is reduced in the central portion.

[0006]

Operation: A rotating body having a hollow portion into which a cylindrical work is injected, a fixed body rotatably supporting the rotating body, and a state in which the work protrudes into the hollow portion of the rotating body from both ends of the hollow portion. That is, the work has a clamping mechanism that inserts the work into a state in which both end surfaces of the work can be cut, and clamps the work in the hollow portion of the rotating body, and makes the work rotatable with the rotating body. In addition, both ends of the work are supported so that they can be cut. According to the invention of claim 1, a rotating body having a hollow portion into which a cylindrical work is injected, a fixed body rotatably supporting the rotating body, and a 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 includes a ring-shaped fixed clamp sleeve coaxial with the hollow portion, a plurality of movable sleeves axially displaceable with respect to the fixed sleeve, and an intervening space between the sleeves and the hollow portion of the rotating body. And a clamp mechanism for displacing the movable sleeve. The clamp mechanism moves the movable sleeve in the axial direction to press the elastic body. It is deformed radially to clamp the workpiece. In the invention of claim 2, a plurality of air cylinders provided at equal angles in the circumferential direction of the fixed body, and rotatably supported by an axis orthogonal to the axis of the rotary body corresponding to each of the air cylinders. And a plurality of lever type claws having an inclined surface in the axial direction of the rotating body,
The movable sleeve is displaced by rotating the lever type pawl by the operating rod of the air cylinder. Claim 3
In the invention, a bearing is provided between the operating rod of the air cylinder and the lever type pawl, and the inclined surface of the lever type pawl is pressed through the bearing. According to the invention of claim 4,
The fixed body and the rotating body are combined via a bearing, and the rotating body is rotated by a belt via a pulley fixed to the rotating body. According to the invention of claim 5, a rotating body having a hollow portion into which a cylindrical work is injected, a fixed body rotatably supporting the rotating body, and a 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 chuck mechanism is rotatably supported by a plurality of air cylinders provided at equal angles in the circumferential direction of the fixed body, and a shaft that corresponds to each of the air cylinders and that is orthogonal to the axis of the rotating body. A plurality of lever type pawls having an inclined surface in the axial direction of the rotating body, and an elastic pad provided at the tip of the lever type pawl are provided, and the operating rod of the air cylinder is provided with the lever type pawl. Rotate the lever type nail by pushing the inclined surface of the nail. It is allowed to press the pad workpiece. In the invention of claim 6, an O-ring or a spring is provided on the opposite side of the pad with respect to the rotation axis of the lever, and the pad separates the lever from the work by the O-ring or spring. Pushing in the direction. In the invention of claim 7, a taper rib having a small diameter on the pad side and a large diameter on the O phosphorus or spring side is provided on the side of the lever type claw facing the work. In the invention of claim 8, the clamp mechanism is provided at both ends of the rotary shaft. According to a ninth aspect of the present invention, there is provided a cylindrical supporter which is an elastic body and has a tapered or arcuate axial cross section whose diameter is reduced in the central portion of the inside of the rotating body.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) is a sectional view of an essential part for explaining an embodiment of a chuck mechanism according to the present invention (I in FIG. 1 (b)).
1 (b) is a side view of FIG. 1 (a), in which 1 is a housing, 2 is a fixed body fixed to the housing 1, and 3 is a rotation having a hollow portion. The bodies 4 are workpieces (cylindrical bodies, which are inserted and clamped in the hollow portion of the rotating body 3,
(Cylindrical body), 5 is a bearing for rotatably supporting the rotating body 3 with respect to the fixed body 2, 6 is a pulley attached to the rotating body 3, and 7 is a belt. In the present invention, the work 4 is The pulley 6 is inserted into the hollow portion of the rotating body 3 and clamped (fixed) to the rotating body 3 as described later.
And is rotated together with the rotating body 3 via the belt 7.

Further, 8 is a ring-shaped fixed sleeve provided so as to project toward the hollow portion side of the rotating body 3, 9 is a movable sleeve which is axially movable with respect to the fixed sleeve 8, and the movable sleeve 9 is A plurality of ring-shaped elastic bodies 10 are provided between the sleeves. Reference numeral 11 denotes a lever type pawl. The lever type pawl 11 is rotatably attached to a support shaft 12 orthogonal to the axis of the rotating body 3, and is axially arranged on the side opposite to the hollow portion of the rotating body 3. It has an inclined surface 11a that inclines. Reference numeral 13 is an air cylinder, 14 is an operating rod that is axially moved by the air cylinder, and 15 is a bearing attached to the operating rod 14, which drives the air cylinder 13 to move the piston 14 in detail. As shown, when moved in the direction of arrow A, the bearing 15
By pressing the inclined surface 11a of the lever type nail 11, the lever type nail 1
1 is rotated in the direction of arrow B, which pushes the movable sleeve 9 in the direction of arrow C to push the elastic ring 10. When pressed as described above, the ring-shaped elastic body 10 deforms in the radial direction and clamps the work 4.

As described above, the work 4 is clamped to the rotating body 3, and in this clamped state, the rotating body 3 is supported by the fixed body 2 via the bearings 5 and 15 and fixed to the rotating body 3. By rotating the two bites 30 which are rotated by the belt 7 driven by a motor (not shown) via the pulley 6 and set to predetermined positions, both ends of the work 4 are cut and processed. To the dimensions of. After processing, when the air in the air cylinder 13 is exhausted, the operating rod 14 retracts, and the bearing 15 also returns to its original position accordingly. At this time, the ring-shaped elastic body 10 is restored by its own elastic force, thereby forming a gap between the ring-shaped elastic body 10 and the work 4,
Is released from the clamp. At the same time, the movable sleeve 9 and the lever type claw 11 are also pushed back to their original positions, and in this state,
The work 4 is pulled out, and the processing is completed. The outer peripheral surface of the fixed sleeve 8 has a taper 8a that widens outward.
Is provided, and in the center of the inside of the rotating body 3,
A supporter 16 is provided which is an elastic body and has a tapered or arcuate cross section with a central portion having a middle height (a cross section along the axial direction of the rotating shaft).
It can be smoothly inserted into the hollow portion of the work piece 4 and holds the work piece 4 stably during processing.

FIG. 3 (a) is a sectional view of a main part for explaining another embodiment of the present invention (a sectional view taken along line II-II of FIG. 3 (b)), and FIG. 3 (b) is shown in FIG. In the side view of (a), the same reference numerals as those in the case of FIG. 1 are attached to the portions having the same operations as those of the embodiment shown in FIG. In FIG. 3, 20 is a lever type pawl, 21 is a taper rib provided on the side of the lever type pawl 20 facing the work 4, and the taper rib 21 has a small inner diameter on both end sides and a central portion at the center as shown in the drawing. The taper is provided so as to be large. The lever type pawl 20 with the taper rib 21 is provided on the shaft 2 orthogonal to the shaft of the rotating body 3.
A lever 23 is rotatably supported around the lever 2, and an elastic body 23 is attached to the tip of the lever 20. The elastic body 23 may be a single ring-shaped elastic body or an elastic body attached to each lever 20 separately. Reference numeral 24 is an O-ring or spring, 25 is a bearing, and the outer peripheral surface of the elastic body 23 is provided with a tapered portion 23a that widens toward the outside similarly to the outer peripheral surface 8a of the fixed sleeve 8 shown in FIG. The work 4 is guided by the taper portion 23a, the taper rib 21 and the supporter 16 of the opening, and is smoothly inserted into the hollow portion of the rotating body 3.

After inserting the work 4 into the hollow portion of the rotating body 3 as described above, air is supplied to the air cylinder 13 to move the operating rod 14 in the direction of arrow A, as shown in detail in FIG. The bearing 15 and the inclined surface 20 of the lever 20
When contacting and pressing a, the lever type claw 20 rotates about the shaft 22 in the direction of arrow B, and the elastic body 23 provided at the tip of the lever type claw 20 is pressed against the work 4, thereby clamping the work 4. To do. In this state, the rotating body 3 is supported by the fixed body 2 by the bearings 5, 15 and 25, and the rotating body 3 passes through a pulley 6 attached to the rotating body 3 and a motor (not shown). It is rotated by a belt 7 driven by.

Thereafter, as in the embodiment shown in FIG. 1, the two cutting tools 30 set at predetermined positions are placed on the work 4.
Is moved in the radial direction, and both ends of the work 4 are cut to finish to a predetermined size. After processing, when the air in the air cylinder 13 is exhausted, the piston 14 retracts, and accordingly the bearing 15 moves to the original position. At this time, the lever type claw 20 is rotated around the rotation shaft 22 to the original position by the elastic force of the O-ring or the spring 24, and the work 4
A gap is created between the two and the clamped state is released. In this state, the work 4 is pulled out from the rotating body 3 and the processing is completed. As described above, this mechanism allows the work to be easily cut to a predetermined size without changing the grip.

[0013]

As is apparent from the above description, the present invention has the following effects. Advantageous Effects According to Claim 1 Both ends can be cut by one clamp without grasping the work and re-rotating the direction of the work, and the work can be easily attached and detached. By using the ring-shaped elastic body, the elastic body is deformed concentrically, the work is aligned with the central axis of the rotating body, and clamping can be performed with high rotation accuracy. Also, do not damage the work when clamping it. Effect corresponding to claim 2 In addition to the effect of claim 1, by using air as a drive source,
Usually, you can use the air that is deployed in the factory,
No special construction is required. Further, the work can be stably clamped by arranging the plurality of pawls evenly. Effects corresponding to claims 3 and 4 In addition to the effect of claim 1, by interposing the bearing between the rotating body and the fixed body, stable rotation is possible and mutual wear does not occur. Effects corresponding to claims 5 and 6 Both ends can be cut by one clamp without grasping the work and re-rotating the work, and the work can be easily attached and detached. With a simple mechanism,
The clamp can be returned to the initial state and can be easily advanced to the next processing. Effect corresponding to claim 7 In addition to the effect of claim 1 or claim 5, the work can be easily inserted and attached. Effect corresponding to claim 8 In addition to the effect of claim 1 or claim 5, a long work can be stably clamped. Effect corresponding to claim 9 In addition to the effect of claim 1 or claim 5, the elastic body supporter allows the work piece to be smoothly inserted and clamped in the hollow portion of the rotating body, and can be stably processed even during rotation. Becomes

[Brief description of drawings]

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

FIG. 2 is an enlarged view of an essential part for explaining the operation of the embodiment shown in FIG.

FIG. 3 is a sectional view and a side view of a main part for explaining another embodiment of the present invention.

FIG. 4 is an enlarged view of an essential part for explaining the operation of the embodiment shown in FIG.

FIG. 5 is a diagram for explaining an example of a conventional chuck mechanism.

[Explanation of symbols]

1 ... Housing, 2 ... Fixed body, 3 ... Rotating body, 4 ... Work piece, 5 ... Bearing, 6 ... Pulley, 7 ... Belt, 8 ... Fixed sleeve, 9 ... Movable sleeve, 10 ... Ring-shaped elastic body, 11 ... Lever type claw, 12 ... Claw supporting shaft, 13 ... Air cylinder, 14 ... Operating rod, 15 ... Bearing, 16 ... Supporter, 20 ... Lever type claw, 21 ... Tapered rib, 22 ... Claw supporting shaft, 23 ... Elastic body, 24 ... O-rings or springs, 2
5 ... Bearing, 30 ... Bite.

Claims (9)

[Claims] 1. A rotating body having a hollow portion into which a cylindrical work is injected, a fixed body rotatably supporting the rotating body, and a work protruding from both ends of the hollow portion into the hollow portion of the rotating body. A clamping mechanism for clamping the workpiece in the hollow portion of the rotating body in a state, and a chuck mechanism of a double-sided cutting machine for rotating the workpiece together with the rotating body to machine both ends of the workpiece. Is a ring-shaped fixed clamp sleeve coaxial with the hollow portion, a plurality of movable sleeves axially displaceable with respect to the fixed sleeve, and interposed between the sleeves on the outer side of the hollow portion of the rotating body. A ring-shaped elastic body and a clamp mechanism for displacing the movable sleeve. The clamp mechanism moves the movable sleeve in the axial direction to press the elastic body to move the elastic body in the radial direction. A chuck mechanism characterized in that the work is clamped by being deformed into a shape. 2. A plurality of air cylinders provided at equal angles in the circumferential direction of the fixed body, and corresponding to each of the cylinders, rotatably supported by an axis orthogonal to the axis of the rotary body. A plurality of lever type claws having an inclined surface in the axial direction of the rotating body are provided, and the movable sleeve is displaced by rotating the lever type claws by an operating rod of the air cylinder. The chuck mechanism according to claim 1. 3. A bearing is provided between the operating rod of the air cylinder and the lever type pawl, and the inclined surface of the lever type pawl is pressed through the bearing. The chuck mechanism described. 4. The fixed body and the rotary body are assembled together via a bearing, and the rotary body is rotated by a belt via a pulley fixed to the rotary body. 4. The chuck mechanism according to any one of 3 to 3. 5. A rotating body having a hollow portion into which a cylindrical work is injected, a fixed body rotatably supporting the rotating body, and a work protruding from both ends of the hollow portion into the hollow portion of the rotating body. A clamping mechanism for clamping the workpiece in the hollow portion of the rotating body in a state, and a chuck mechanism of a double-sided cutting machine for rotating the workpiece together with the rotating body to machine both ends of the workpiece. Is a plurality of air cylinders provided at equal angles in the circumferential direction of the fixed body, and is rotatably supported by an axis orthogonal to the axis of the rotary body corresponding to each of the air cylinders and is rotatable. A plurality of lever type pawls having an inclined surface in the axial direction of the body, and an elastic pad provided at the tip of the lever type pawl, and the operating rod of the air cylinder are connected to the lever type pawl. Push the inclined surface to rotate the lever type pawl A chuck mechanism, wherein the pad is pressed against a work. 6. An O-ring or a spring is provided on the opposite side of the pad with respect to the rotating shaft of the lever, and the O-ring or spring is used to move the lever in the direction in which the pad separates from the work. The chuck mechanism according to claim 5, wherein the chuck mechanism is pressed. 7. The side of the lever type claw facing the work,
7. The chuck mechanism according to claim 5, further comprising a tapered rib having a smaller diameter on the pad side and a larger diameter on the O phosphorus or spring side. 8. The chuck mechanism according to claim 1, wherein the clamp mechanism is provided at both ends of the rotary shaft. 9. The cylindrical supporter having an elastic body at the center of the inside of the rotating body and having a tapered or arcuate axial cross-section with a reduced diameter at the center. 9. The chuck mechanism according to any one of 8 to 8.