JPH06155210A - Clamp device - Google Patents

Abstract

PURPOSE:To prevent abnormal vibration and working distorsion of a work due to cutting resistance during working by providing a presser metal for pressing the clamp of a leg part and the outer circumference of a motor frame. CONSTITUTION:Positioning pins 3 are inserted into the leg holes 10b of a work 10, the lower face of the leg part 10a is fitted along a work fitting base 4. At this time, the pressure of pressure fluid is lowered and oil pressure source is cut off, a rod is retreated by resiliency of a spring, simultaneously a clamp 5 is turned along the helical groove of the rod by a guide pin, the work leg part 10a are firmly held, and hence the work 10 is positioned in the condition perpendicular to a rotary base 1 conforming to rotational centers. Meanwhile, pistons 8 are pushed out by resiliency of springs 9, the springs 9 are made in the condition of copyingly contacting presser metals 6 with the outer circumference of the work 10 through guide shafts on the extreme ends in the direction of the rotation center and spacers and holding it. The rotary base 1 and a common base 2 are rotated in this condition, and both the end faces and the bore of the work 10 are worked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clamp device used when a motor frame with legs is mounted on a table of a clamp machine tool and rotated to perform machining such as cutting and drilling.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 10, the work rest 31 is attached to the rotation base 1.
Is mounted to position the height from the rotation base 1 to the bottom surface of the work 10, and the work is held by the vise 32 movable in parallel with the top surface of the rotation base 1, and the work is tightened by the three vices 32. The method of holding the central position of 10 is general.

[0003]

As described above with reference to FIGS. 9 and 10, for example, when end face machining and inner diameter machining of a motor frame are performed, the work rest 31 supports the work 10 so that the back surface side Since machining cannot be done, the machining must be stopped and the work piece turned over in order to process the back side. In addition, since the work is held by separate vices 32 using the handles (not shown), the work is eccentrically held and the tightening force is not uniform. Therefore, the work may scatter during deformation or machining. However, there is a problem that the workpiece vibrates due to cutting resistance during machining and machining abnormality occurs. The present invention provides a clamp device having a simple structure that solves the above-mentioned problems.

[0004]

The clamp device of the present invention has a polygonal common base having a plurality of surfaces perpendicular to the upper surface of the rotating base, and a structure in which a part of the common base can be opened and closed. A semi-circular or circular opening / closing door, a notch for discharging chips and cutting water generated during processing in a part of the common base, and one or more provided in the common base parallel to the upper surface of the rotary base. A plurality of clamps having a positioning pin, a cylinder device that holds the motor frame leg portion and can swing about an axis parallel to the positioning pin and that can move back and forth, and can move forward and backward in a direction parallel to the rotation base. It is provided with a plurality of holding fittings for holding the outer periphery of the motor frame.

[0005]

After inserting the work leg hole into the common base positioning pin, the leg clamp is manually or automatically returned to the position shown in FIG. 6 to close the opening / closing door. Then, by disconnecting the hydraulic source (not shown) for releasing the leg clamp, the leg clamp pulls the metal fittings to the common base side by the spring action and holds the work leg part. Positioned perpendicular to. Also, after closing the open / close door, disconnect the air pressure source (not shown)
The tip of the metal fitting holds down the work due to the spring action of the metal fitting.
By these, the work is reliably positioned and fixed to the common base. Chips and cutting water during processing are satisfactorily discharged from the notches provided on the common base.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes a rotary base, and this rotary base 1
A positioning knock pin (not shown) is provided on the upper surface of the common base 2 to be fixed at a position where the center of the work 10 and the center of rotation of the rotation base 1 coincide when the work 10 is attached.

The common base 2 has three surfaces which are perpendicular to the rotary base 1 and are at right angles to each other. The work mounting base 4 is fixed to the central surface of the common base 2 and is fixed by a positioning knock pin (not shown). A notch 2b as shown in FIG. 8 is provided at the connecting portion on the surface of the common base 3.

In the work mounting base 4, there are, for example, two highly accurate holes for mounting the leg hole positioning pins 3 at positions where the height of the work to be clamped and the height at which the processing tool enters the bottom surface of the work are taken into consideration. The leg hole locating pin 3 is inserted therein and mounted parallel to the upper surface of the rotating base and at the same height.

On the other hand, the cylinder 24 is parallel to the leg hole positioning pin 3 at a position where it does not interfere with the work mounting base 4.
Mounted in place. A highly accurate hole is provided in the center of the cylinder 24, and a guide pin 27 is attached so as to protrude from the hole. Then, the rod 26 is held in the hole so as to be swingable, and the guide pin 27 is slidably fitted in the spiral groove provided on the outer periphery of the rod 26.

On the other hand, a spring 25 is attached to the other end at a position sandwiched between a hole provided inside the hollow flange and a rod 26, and the repulsive force of the spring 25 urges the rod 26 in the direction of arrow C at all times. It A flange 24a having an inflow / outflow port 29 for letting in and out a pressure fluid such as oil is attached to the cylinder 24. The clamp 5 is attached to the tip of the rod 26 by a nut 28 in a rotation-stopped state.

On the other hand, a plurality of air cylinders 8 are mounted on the common base 2 and the opening / closing door 7 in parallel with the upper surface of the rotary base at the center of rotation 12 via a cylinder mounting plate 14.
The air cylinder 8 is provided with an inflow / outflow port 23 for inflowing and outflowing a pressure fluid (not shown) such as air.

A piston 8 is provided inside the air cylinder 8.
a is in a slidable state, and the tip screw has shaft 1
Fix 6 with mounting nut 15. An appropriate meshing hole is provided in the shaft 16, and a pin 17 is press-fitted therein, and a connecting shaft 18 is engaged with the shaft 16 in a swingable state.
The threaded hole of the connection shaft 18 and the threaded hole of the spring retainer fitting 19 are connected by a male screw at the shaft end of the guide shaft 20.

The spring 9 has a connecting shaft 18 and a shaft 16 penetratingly arranged between the spring retainer 19 and the cylinder mounting plate 14, and the air cylinder 8 is constantly moved in the direction of arrow D by the repulsive force of the spring 9. Be energized. The guide shaft 20 is attached in a swingable state so as to be wrapped in a swing plate 21, and a spacer 22 is attached to the tip thereof.
The pressing metal fitting 6 comes into contact with the work piece via the.

On the other hand, the opening / closing door 7 is connected to a hole provided in the opening / closing door 7 through a hinge pin 11 inserted into a hole provided in the common base 2, and is attached so as to be rotatable around the hinge pin 11. By inserting the lock pin 12 into the fixing hole 2a provided in the common base 2 and the fixing hole 7a provided in the opening / closing door 7, the opening / closing door 7 and the common base 2 are fixed.

In the above construction, when the work is carried in, the opening / closing door 7 is wide open so that it does not interfere with the carrying in. At this time, the clamp 5 is in the state shown in FIGS. 4 and 6. Here, a pressure fluid (oil in this embodiment) is fed by an arrow Y from a pressure source (not shown).
When it is made to flow into the cylinder 24 through the inflow / outflow port 29 of the flange 24a in that direction, the pressure causes the rod 26 to overcome the repulsive force of the spring 25 and rise in the direction of arrow Y. At the same time, the guide pin 25 swivels the rod 24 along the spiral groove formed in the rod 24, and the four clamps 5 are shown in FIG.
It will not interfere with the loading of the work.

On the other hand, as shown in FIG. 3, when a pressure fluid (air in this embodiment) from a pressure source (not shown) is made to flow into the air cylinder 8 through the inflow / outflow port 23 in the direction of arrow X, the pressure causes the piston 8a to spring. The repulsive force of 9 is overcome, and the holding metal fitting 6 does not move in the direction opposite to the arrow D and does not interfere with the work loading. In this state, the leg hole 10b of the work 10 is inserted into the positioning pin 3 so that the lower surface of the leg 10a is attached to the work mounting base 4. At this time, as shown in FIG. 4, by lowering the pressure of the pressure fluid (oil in this embodiment) and disconnecting the hydraulic source (not shown), the rod 24 is pulled in the direction of arrow C by the repulsive force of the spring 23, and at the same time the guide pin is pulled. By turning 25 along the spiral groove of the rod 24 to the state shown in FIG. 6, the clamp 5 firmly holds the work leg portion 10a, and the work 10 is placed in a state where the rotation center is perpendicular to the rotation base 1 and the rotation center coincides. Positioned.

On the other hand, when the opening / closing door 7 is positioned as shown in FIG. 1 and the lock pin 12 is inserted into the fixing hole 2a and the fixing hole 7a,
The door 7 and the common base are firmly held. In this state, the pressure of the pressure fluid (air in this embodiment) is lowered as shown in FIG. 3, and the pressure source (not shown) is separated, the piston 8 is pushed in the direction of arrow D by the repulsive force of the spring 9, and the spring 8 rotates. It is pushed in the direction of the arrow D, which is the center direction, and the holding metal fitting 6 is inserted through the guide shaft 19 and the spacer 21 at the tip.
Is in a state of being in contact with and held along the outer periphery of the work 10.

As shown in FIG. 8, in this state, the rotating base 1 and the common base 2 are rotated in the direction of arrow E, and the work 1
When both end surfaces of 0 and inner diameter are machined, chips and cutting water generated by cutting are discharged as shown by arrow G or arrow F.

Further, there is nothing that comes into contact with the bottom surface (shown by arrow F) of the work 10 in FIG. Also, common base 2
Since a sufficient space for the tool 10 is secured from the bottom surface of the workpiece 10 to the bottom surface of the workpiece 10 (indicated by arrow F), the bottom surface machining of the workpiece 10 indicated by arrow F can be performed without inverting the workpiece.

[0021]

According to the present invention, the motor frame, which is the work, is positioned with high accuracy, the inner diameter and both end faces can be processed in one mounting operation, and the work can be clamped at the same time while the leg is clamped. There are no problems such as abnormal vibration of work or machining strain due to cutting resistance during machining. Further, it has effects such as good discharge of chips and cutting water.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a clamp device of the present invention,

FIG. 2 is a front view,

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view of part B in FIG.

FIG. 5 is a clamp position diagram when loading a work,

[Fig. 6] Clamp position diagram during work clamp,

FIG. 7 is a shape diagram of a work,

FIG. 8 is a conceptual diagram during processing,

FIG. 9 is a plan view of a conventional work clamp device,

FIG. 10 is a side view of a conventional Roke clamp device.

[Explanation of symbols]

 2 ... Common base 7 ... Door 2b ... Notch 3 ... Positioning pin 5 ... Clamp 6 ... Holding metal fitting

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takeyuki Akatsuka 1-24-2 Harumicho, Fuchu, Tokyo TOSHIBA FA System Engineering Co., Ltd.

Claims (1)

[Claims] 1. A polygonal common base having a plurality of surfaces perpendicular to the upper surface of a rotating base, and a semi-circular or circular opening / closing door having a structure in which a part of the common base can be opened and closed. Holds a notch for discharging chips and cutting water generated during processing on a part of the base, one or more positioning pins provided on the common base in parallel with the upper surface of the rotating base, and a motor frame leg. A plurality of clamps provided with a cylinder device that can swing around an axis parallel to the positioning pin and that can move forward and backward, and a plurality of clamps that hold down the outer periphery of the motor frame that is parallel to the rotation base and can move forward and backward in the direction of the center of rotation. Clamping device characterized by having one metal fitting.