JPS6034273A - Work clamp device for injection machining - Google Patents

Abstract

PURPOSE:To improve machining efficiency ever so better, by locking a pair of clamp members to the tip end of a paired reciprocating member rotating together with a couple of turning members in one, while performing the injection machining of a work held by these clamp members in between under pressure as being rotated and vibrated at high speed. CONSTITUTION:Air is made to flow in a second opening hole 26b from an arrow G direction, flow inside a hollow chamber 20a by way of a second interconnecting hole 21e, and a reciprocating member 16 is pressed toward an arrow H, shifted to a most left end position whereby a work W is held by a pair of clamp members 17 in between under pressure. Next, a paired turning member 15 is rotated by a motor via a sprocket 29 and the work is also rotated via these clamp members 17, while an impeller is rotated by the motor via a belt 9, and a shot is sprayed to the work, thus efficient injection machining takes place for the work.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece clamping device for jetting processing, and in particular, a pair of reciprocating members that reciprocate in a horizontal direction hold a workpiece under pressure and rotate it while performing jetting processing.
The present invention relates to a workpiece clamping device for injection machining that is capable of rotating a workpiece at high speed.

In conventional jet machining equipment, jet machining is performed while the workpiece is suspended in a trench or suspended in a cage and rotated at low speed. Since it was not possible to perform jet machining while giving the same amount of pressure, the jet machining often had disadvantages such as insufficient effects and low machining efficiency.

The present invention has been made in order to eliminate the drawbacks of the above-mentioned prior art, and its purpose is to rotate integrally with n+ pairs of rotating members arranged oppositely and to form a A pair of clamp members are fixed to the tips of a pair of reciprocating members that slide in the axial direction by fluid pressure in a hollow chamber, and the workpiece is held under pressure, thereby preventing the workpiece from vibrating while rotating at high speed. The objective is to improve machining efficiency by making it possible to perform jet machining while giving a sufficient amount of effect from jet machining, and to adjust the fluid pressure to adjust the gripping force of the clamp member against the workpiece to the jet force during jet machining. The object of the present invention is to enable the workpiece to be in an optimal state depending on the situation, thereby preventing the workpiece from falling off during injection processing, and facilitating the installation and removal 7 of the shredding tower.

In summary 1., the present invention includes a pair of rotating members disposed facing each other, and a rotating member that rotates integrally with the rotating members, is inserted into a hollow chamber formed in the rotating members, and is slid in the axial direction by fluid pressure. It is characterized by comprising a pair of reciprocating members that move, and a pair of clamp members fixed to the tips of the reciprocating members, and configured so that the workpiece is held under pressure E7 by the clamp members and rotated. It is something to do.

The present invention will be explained below based on the embodiments shown in the drawings.As shown in FIGS. A pair of blades JX8 is rotated by a motor 10VC through a belt 9, and a shot, for example, a steel ball with a diameter of 1.7 to 20cm, is thrown into the impeller 8 and is applied to the workpiece W in the range of arrows A-B at 80km/h. .

The VC is set to inject at around 400kv per minute.

The shot shot from the workpiece V falls, is collected on a screw conveyor 12, is conveyed upward, and is again thrown into the impeller 8.

As shown in FIG. 1, the work clamp device 1 according to the present invention is arranged symmetrically on the left and right sides of a machine stand 7, and includes a pair of cylindrical members 14, a pair of rotating members 15, and a pair of reciprocating members. ] 6 and a pair of clamp members 17. The details of the work clamp device 1 on the right side in FIG. 1 will be explained below with reference to FIG. 3.

The cylindrical member 14 has a first cylindrical member 14. Second and third cylindrical members 14a
, 14b, and 14C, each of which has a hollow shape and is fixed to the machine base 7. A second cylindrical member 14b is disposed on the outer periphery of the first cylindrical member 14a with a gap a therebetween, and a third cylindrical member 14C is disposed on the outer periphery of the second cylindrical member 14b. They are placed across a gap.

The rotating member 15 has a first. second and third rotating members 19;
The first rotating member 19 is formed into a hollow cylindrical shape and is rotatably supported by the first cylindrical member 148 via a pair of bearings 22 . The second rotating member 20Vi is press-fitted into the outer peripheral portion of one end of the first rotating member 19.

Further, the second rotating member 20 VC includes a hollow chamber 20 having a diameter larger than that of the outer cylinder portion on the first rotating portion side 19.
a is formed. The third rotating member 21 includes a flange portion 21a and a first portion protruding from both ends of the 7272 portion.
and second shaft portions 21b and 21C, and the flange portion 21a is fixed to one end of the second rotating member 20 via a seal member 25. The first shaft portion 21b protrudes toward the second rotating member 20, and the first shaft portion 21b of the WJ2
A cylindrical connecting member 26 is attached to the bVC via a sealing member 25 and a bearing 22.

Two first and second opening holes 26a and 26b are formed in the outer circumference of the connecting member 26, and the first opening hole 2
6a is parallel to the first axis of the first shaft portion 21b and
A first communication hole 21d opened at one end of the shaft portion of the
&C are connected.

A second opening hole 26bVi, which is parallel to the axis of the second shaft portion 2IC, is formed by opening at the connection portion between the flange portion 21a and the first shaft portion 21b5-.Second communication hole 21
It is connected to e. Also, the first and second opening holes 2
6a and 26b are connected to a fluid supply source, such as an air tank (not shown).

Further, the first rotating member 19vL is implanted in the first rotating member, and a sprocket 29 is integrally fixed by a key 28. 30 and collar member 31 restrict movement in the axial direction. A chain 33 is unwound between the sprocket 29 and a motor 32 fixed to the machine base 7, and when the sprocket is rotated by the motor 32 via the chain 33, the rotating member 15 is rotated. ing.

The forward motion member 16 includes a flange portion 35, a shaft portion 36, and a cylinder portion 37, and the flange portion 35 is slidably inserted into the hollow chamber 20H of the second rotating member 20 via the seal member 25 [7]. 114 (inserted into the shaft part 36 pieces, seal member 2
5, and is integrally fixed to the flange portion 35 through the sealing member 25, and is fitted into the sliding hole 19a formed through the axis of the first rotating member 196-. ing. In addition, the outer peripheral portion V of the shaft portion 36
C is formed with a key groove 36a, and the key front VC first
A t1fc key 38 is inserted into the rotary member 19 at the f position.

A sliding hole 16a with one end open is formed in the axis of the 1fc reciprocating member 16, and the first shaft portion 21b of the third rotating member 21 passes through the sliding hole VC through the sealing member 25. It is inserted. The bottom pricking needle of the sliding hole 1fia has a connecting hole I (and 1110 on the outer part of the shaft part 36).
A communication hole 36b is formed. A communication groove 36C is formed in the outer peripheral portion of the shaft portion 36. One end reaches the flange portion 35 and the other end communicates with the communication hole 36b.

The cylindrical portion 37 is separated from the first and second cylindrical portions 37a and 37b, and these cylindrical portions are fixed to one end of the shaft portion 36 of the reciprocating member 16, and the first cylindrical portion 37aU, The sealing member 25 is inserted into the gap a between the first cylindrical member 14a and the second cylindrical member 14b through the intermediary 1. Second cylindrical portion 37b
is inserted into the gap bvc between the second cylindrical member 14b and the third cylindrical member 14C.

17 clamp deposit members are fixed to one end of the shaft portion 36 of the reciprocating member 16, and are fixed to a disk 40 made of single-temperature hardened steel by a fixing means such as an adhesive side, and are made of an elastic body with a large coefficient of friction, For example, it is made of a rubber material and has a rubber butt 17. In the embodiment shown in Figure 1, the diameter of the clamp part I7 is 1).
, 250m long, 15 straights on the shore, 10 discs in diameter, 2
50 m, thickness t2 x 20 strips, respectively.

Misfire F! 1) It is constructed as shown in a11 above, and its function will be explained in detail below. As shown in Figure 1,
When air flows into the first opening hole 26a due to the directional force of arrow C, the air follows the communication holes 21d and 36b and the communication groove 36C, flows into the hollow chamber 20a vc, and moves into the column movable member 161'.
j, is pressed in the direction of arrow 1) and moves to the rightmost position.

At the same time, the air in the hollow chamber 2Oa follows the communication hole 21Of and is discharged from the second opening hole 26b in the direction of the arrow E.

In order to move the clamping member 17 from the state shown in FIG. 3 in the direction of arrow F to clamp the workpiece W as shown in FIG.
b. Then, the air flows into the hollow chamber 2Oa through the second communication hole 21e, causing the reciprocating member 16 to move in the direction indicated by the arrow H.
Pressing VC in the direction of 1°, the reciprocating member 16
is moved to the leftmost fixture 8, and at the same time, the air in the tr hollow chamber 2a is discharged from the first opening hole 26a in the direction of the arrow J through the communication groove 36C, 1 series 1 hole 36b, 21d. 'L.

In this way, the workpiece W is held between a pair of clamp members 17V
After the sprocket 29 is held under pressure by the motor 32 via the chain 33, the rotating member 15 rotates and the workpiece W is held via the clamp member 17.
rotates. In this state, the impeller 8 is rotated by the motor 10 via the belt 9, and shot is injected onto the workpiece W to perform injection processing. In this case, the workpiece W is held under pressure by the clamping member 17 made of an elastic material with a large coefficient of friction, so the clamping member 17 sinks into the uneven surface of the workpiece W, and the gripping force becomes considerably strong. ) - Even if the clamping member 17 is installed at a biased position with respect to the center of gravity of the workpiece W, there is no risk that the workpiece W will fall off from the clamping member. Further, when the injection force of the shot is large, the gripping force is increased by increasing the air pressure in accordance with the injection force, so there is no fear that the work l will fall off from the clamp member 17.

In this case, the workpiece W is held under pressure by the pair of horizontally arranged clamp members 17, so even if the workpiece W is rotated at high speed or while being vibrated, the workpiece The workpiece does not fall off from the crank member 17, sufficient effects can be obtained from the injection machining, and machining efficiency is improved. Since the cylindrical portion 37 of the rotating member 15 is inserted into the cylindrical member 14, the reciprocating member 16
The reciprocating member always slides smoothly without dust entering the sliding portion of the reciprocating member.

When the workpiece W is to be taken out after the injection machining is finished, the air can be flowed into the first opening hole 26a from the direction of arrow C and discharged from the second opening hole 26b in the direction of arrow E, as described above. The reciprocating member 16 moves to the 10th right end position, and the workpiece W can be taken out.

Since the present invention is constructed and operates as described above, the present invention rotates integrally with a pair of rotating members disposed opposite to each other, and rotates the shaft within the hollow chamber formed in the rotating members using fluid pressure. A pair of clamp members are fixed to the tips of a pair of reciprocating members that slide in the direction to hold the workpiece under pressure, so injection machining can be performed while rotating the workpiece at high speed or while applying vibration to the workpiece. It is possible to obtain a sufficient effect by injection processing and has the effect of improving efficiency. In addition, by adjusting the fluid pressure, it is possible to optimize the gripping force of the clamp member on the workpiece according to the jetting force during jetting machining.As a result, the workpiece is prevented from falling off during jetting machining, and the workpiece is not easily attached. This has the effect that removal is facilitated.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a front view of the injection processing apparatus equipped with a work clamping device, FIG. 2 is a right side view of the same as shown in FIG. 1, and FIG. 3 is one of the work clamping devices. FIG. 1 is a workpiece clamping device, 15 is a rotating member, 16 is a reciprocating member, 17 is a clamping member, 20a is a hollow chamber, and W is a workpiece. Patent applicant Hino Motors Co., Ltd. Agent Patent attorney 1) Kazuo Figure 1 Figure 2

Claims (1)

[Claims] a pair of rotating members arranged to face each other, and a pair of reciprocating members that rotate integrally with the rotating member and are fitted into a hollow chamber formed in the rotating member and slide in the axial direction by fluid pressure. A workpiece clamping device for injection machining, comprising: a pair of clamp members fixed to the tip of the reciprocating member, the workpiece being clamped and held by the clamp members and rotated.