JPS59166434A - Jig - Google Patents

Abstract

PURPOSE:To eliminate hydraulic hoses and to make it possible to automatically and conveniently carry out the securing and releasing of a workpiece, by providing such an arrangement that the supply of pressurized hydraulic oil into a clamping cylinder, and the opening and closing of a control valve for maintaining the pressure of hydraulic oil may be made by means of pressurizing rods separately arranged. CONSTITUTION:When a piston rod 5 is moved by inserting the pressurizing rod 25 of an externally actuating cylinder into an actuating hole, a piston 15 lowers so that a pushing member 19 is rotated downward and therefore a workpiece is secured to a jig. When a piston rod 23 is moved by means of a rod 27 to open a control valve 20, a clamping sleeve 9 firmly clamps the piston rod 5. When the control valve 20 is closed by means of a rod 29 so that the piston rod 5 is secured by the sleeve 9, the workpiece may be stably secured to the jig. Next, when the control valve 20 is opened by means of the rod 29, the piston rod 5 is released from the sleeve 9 so that the piston 12 is pushed up, and therefore, the pushing member 19 is reversely moved upward, thereby the workpiece is released from its secured condition and is transferred to another place.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a jig used, for example, in a machining center.

[Technical background of the invention and its problems]

Generally, in a machining center, a workpiece is fixed with a jig and then mounted on a rotary table, and the rotary table sequentially rotates by a predetermined angle to perform a predetermined process on the workpiece. Conventionally, there is a hand-tight type jig that has been commonly used in machining centers, but with this type of jig, the work of fixing the workpiece to the jig is complicated and cannot be done quickly. Therefore, hydraulic pressure is used to automate the work of fixing workpieces to jigs. However, when using hydraulic pressure, it is necessary to connect a pressure oil supply hose to the hydraulic equipment such as a hydraulic cylinder built into the jig, which is difficult to do on the rotary table of the machining center. When turning, there is a skin where the hose ends. Machining centers, like deer, process a wide variety of products in small quantities, and correspondingly a wide variety of jigs are used, making it inconvenient to replace the hose each time the jigs are replaced.

[Purpose of the invention]

The present invention has been developed in consideration of the above circumstances, and aims to provide a jig that can automatically and easily fix and release workpieces and is suitable for medium- to small-volume production of a wide variety of products. purpose.・ [Summary of the Invention] The supply of pressure oil to the clamp cylinder for clamping the workpiece, the maintenance of the clamp pressure, and the opening and closing of the control valve for maintaining the clamp pressure are provided independently from the jig. It is operated by a pressurizing rod, which eliminates the need to supply pressure oil from the outside, and also eliminates the need to attach and detach hoses or electric plugs for supplying pressure oil and operating control valves.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the jig of this embodiment. Jig body (1
) is formed into a flat plate whose principal surface is approximately square.

This jig main body (1) has a first internal operation cylinder (2
) is built-in. This first internal operating cylinder (2
), as shown in FIG. 2, a piston (3) is fitted therein. A piston rod 5) is coaxially connected to the piston (3) on the side opposite to the pressure oil (4) side of the piston (3). A portion of this piston rod (5) extends from the first internal operating cylinder (2) to the first operating hole (6).
Internally protruding. However, the tip (d) of the piston rod (5) is provided so as not to protrude from the opening in the side surface (7) of the first operation hole (6).
A cylindrical oil chamber (8) through which the piston rod (5) coaxially passes is provided at the end of the internal operation cylinder (2) opposite to the pressure oil (4) side. In this oil chamber (8),
A fastening sleeve (9) formed of a thin metal plate surrounding the outer circumferential surface of the piston rod (5) is housed inside the piston rod (5).

This fastening sleeve (9) is mounted in a liquid-tight manner so that the pressure oil (10) filled inside the oil chamber (8) will not leak out of the oil chamber (8). The pressure oil (10) side of the first internal operation cylinder (2) is connected to a plurality of clamp cylinders 01) built into the jig body (1).
1) through a passageway (1a) formed in the main body.

Pistons (12) are fitted into these clamp cylinders (11). Piston (121・
An elastic body (13) such as a compression spring is inserted into the bottom side of the clamp cylinder (11) of the piston α needle. A piston rod (1→...) is connected to the opposite side.This piston rod (14)... is a cylinder 01)...a partition wall 05) provided inside.
It penetrates liquid-tightly. Pressure oil (4) supplied through the passage (1a) is filled between the partition wall (l) and the piston housing 4. At the tip of the rod α→..., there is a support column α6.
)... A rod (17)... is detachably attached. A suppressor (1) for fixing the workpiece is connected to the end of the rod opposite to the piston rod (1(A)). The pressing body (US...) is forced to rotate forward and backward by 90 degrees as the rod (L7)... moves up and down by a rotating mechanism (not shown) using a cam mechanism. , support column 06)..., rod (17)..., pressing body H
. . . and the rotation mechanism constitute a clamp device (C) . On the other hand, the oil chamber (8) is connected to the second internal operation cylinder (21) via a control valve (20) and a passage (1b) built into the jig body (1). This second internal operation cylinder (21) supplies pressure oil α0 to the oil chamber (
8). The tip of the piston rod (C) connected to the side opposite to the piston (10 side) fitted into the second internal operation cylinder (21) is connected to the second internal operation cylinder (21). A second hole (not shown) protrudes from the cylinder (21) and is drilled inside the jig body (1).
It is stored inside the operation hole. In addition, the control valve (a) is a push rod (goods) that self-returns to the fixed position by a spring.
Each time the push rod C24) is pressed once, the control valve (control valve C24) can be alternately switched between the open state and the closed state. 2
4) is partially attached to the control valve (20) and the protrusion jig body (1).
) It is housed inside a third operation hole (not shown) bored inside.

Next, the operation of the jig of this embodiment will be described.

First, a special workpiece is transferred to a predetermined position of the film stripping jig main body (1) on a setup device (not shown) using, for example, a transfer robot. At this time, clamp cylinder 01)...
・ is not operating, and the pressing body 0! 1)... is an elastic body (
13)... are separated by the repulsive force, and are in a state rotated 90 degrees from the state shown in FIG. Next, the pressurizing rod Q of the first external operating cylinder disposed outside the jig is inserted into the first operating hole (6) to suppress and move the piston rod (5) in the direction of arrow Q0. Then,
Pressure oil (4) passes through the passage (1a) to the clamp cylinder 0.
1)... K is supplied, and the pistons (12+) descend against the repulsive force of the elastic bodies (13)... Then, as the pistons 02... descend, the pressing bodies ( 11・
... are rotated by the rotation mechanism to the position shown in FIG. 2, and as a result, the rods αη... are lowered, and as a result, the workpiece 0 mark is fixed to the jig. The forward movement of the pressurizing rod 0■ is stopped when the reaction force applied to the pressurizing rod (2■) reaches a set value as a reaction.Next,
Immediately after the pressurizing rod (25) stops, insert the pressurizing rod (2) of the second external operating cylinder, which is arranged parallel to the first external operating cylinder, into the second operating hole, and press the piston rod. ) in the direction of the arrow (2Q).

At this time, the control valve (20) is kept open. Then, the pressure oil 00) is supplied to the oil chamber (8) via the passage (1b) and the control valve (2n). As a result, the fastening sleeve (9) which is attached to the piston rod (5) firmly fastens the piston rod (5). However,
Immediately after tightening the piston rod (5), Insert the pressure rod of the third external operation cylinder arranged parallel to the second external operation cylinder into the third operation hole, press and move the push rod A) in the direction of arrow I30, The control valve (20) is closed. As a result, the piston rod 5
) is closed while the control valve (20) is in the closed state.
The hydraulic pressure inside the clamp cylinder (9) is maintained at the pressure at the time of stopping the pressurizing cylinder (2 cylinders), and the workpiece is always stably fixed to the jig. I can do it.

Then, the pressurizing rod (25) @, 121 is retreated to its original position. In this way, the workpiece (18) is set in the fastened jig and machining center, and the workpiece (18) is set in the machining center.
18) undergoes the intended processing. After the machining is completed, the jig is returned to the setup device again. And the pressure rod 00
is inserted into the third operation hole, and the push rod e4) is again pressed and moved in the direction of the arrow (a) to open the control valve (211Jl).Then, the pressure oil 00 is released from the oil chamber (8). Passage (1
b) and the control valve through the second internal operating cylinder (
21). As a result, the piston rod (5) of the first internal operating cylinder (2)
) and the piston (3) is released from the fastening from arrow c!
Move in the direction opposite to S. That is, the pressure oil (4) passes from the clamp cylinder 01) through the passage (1a) to the first
is returned to the internal operation cylinder 0]). As a result, the piston (121) is pushed up by the elastic force of the elastic body (13).

Accordingly, the suppressing bodies 01... rise to their original positions while being reversed by 90 degrees. In this way, the workpiece (Il?l) is released from the fixed state and transferred to another location by the transfer robot.In this way, the jig of this embodiment is arranged at a distance outside the jig. The first internal operating cylinder (2) is operated by the external operating cylinder (2) to supply pressurized oil (4) to the clamp cylinder (i]) that fixes the workpiece. , it is possible to easily automate the fixing and unfixing operations of the workpiece 081. Also, since there is no need for a hose for supplying pressure oil, transportation and installation become quick and simple.
Since C)... is removable, the clamp device (C)
By simply replacing..., it is possible to fix workpieces of various sizes and shapes, making it suitable for small to medium volume production of a wide variety of products. In addition, the hydraulic pressure inside the clamp cylinder 01) is maintained by tightening the piston rod (5) of the first internal operation cylinder (2) with the tightening sleeve (9), so that the hydraulic pressure is maintained. This can be done reliably and prevents a drop in oil pressure.

In the above embodiment, the oil chamber (8) is integrally attached to the end of the first internal operation cylinder (2), but is separated from the first internal operation cylinder (2). It may be provided. In order to make the fastening more complete, the fastening sleeve (9) may be provided with a plurality of slits. In addition, in order to ensure a predetermined pressure, the piston (3) is installed in the first internal operation cylinder (2).
and the piston rod (5), the piston (3) is movable in the axial direction of the piston rod (5), and the piston rod (5) does not penetrate the piston (3) and maintains a sealing property. , piston rod (5) and piston (3
), one end of each is fixed, and via this elastic body, the piston rod is suppressed from the piston (3).
The information may be transmitted to

〔Effect of the invention〕

Since the jig of the present invention performs a series of fixing or unfixing operations of the workpiece using a pressurizing rod installed independently of the jig, automation is facilitated. Also,
Since pressure oil does not need to be supplied from the outside, a hose for supplying pressure oil is not required, and transportation and installation on an automatic machine tool can be performed simply and quickly. Moreover, since the clamping force is maintained by tightening the piston rod of the internal operation cylinder, the hydraulic pressure can be reliably maintained for a long period of time, improving the reliability of the jig. However, the jig of the present invention, together with the above-mentioned effects, is suitable for medium- to small-quantity production of a wide variety of products.

[Brief explanation of drawings]

FIG. 1 is a cutaway front view of essential parts of a jig according to an embodiment of the present invention, and FIG. 2 is a diagram showing a hydraulic circuit system of the jig shown in FIG. 1. (1) Two jig bodies, (2): First internal operation cylinder. (4), θ■: Pressure oil (working fluid), (5): Piston rod (first). (8): Oil chamber (fluid chamber), (9): Tightening sleeve. Circle: Clamp cylinder, α樟: Workpiece. (Spring: control valve, ff1l): 82
internal operating cylinder. (231: Piston rod (second), 04): Push
Stick.

Claims (1)

[Claims] A jig characterized by having the following configuration. 0) A jig body on which the workpiece is placed (b) A clamp cylinder P-3 which is operated by fluid pressure and fixes the workpiece to the jig body (by external force). a first internal operating cylinder that surrounds the first piston rod and operates the clamp cylinder by supplying working fluid to the clamp cylinder by operation of the first piston rod; A fastening sleeve (to) a fluid chamber in which the fastening sleeve is inserted (to) a second piston rod operated by an external force;
a second internal operation for supplying working fluid to the fluid chamber by operating the piston rod of the clamping sleeve to clamp the first piston rod and maintain the fixed state of the workpiece; Cylinder (g) is provided between the second internal operation cylinder and the fluid chamber, and has a push rod that is operated by an external force, and the open and closed states of the cylinder are alternately switched by operating the push rod. A control valve that controls the tightening operation by the above-mentioned tightening sleeve.