JPS6032906Y2 - Pressing machine operation control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for automatically controlling the operation of a press machine.

Many stamping machines are automated by standardizing the materials.

However, for example, drilling holes in molds for aluminum sashes is a field that is difficult to automate.

The reason for this is that aluminum profile workpieces cannot be automatically fed by an automatic feeder, and the processing conditions differ from product to product, and the number of processing is small.

For these reasons, workpieces such as aluminum profiles are processed using pedal-operated press machines.

Pressing work using a pedal-operated press machine is extremely tiring because the user supports the body weight with one foot while pressing the pedal with the other foot.

The purpose of the present invention is to automate the pedal depression operation of this type of press machine to reduce work fatigue.

On the other hand, in this type of press processing machine, the workpiece must be supplied to the mold in a correctly positioned state each time it is processed.

Since this positioning and supplying operations are performed each time by a worker, it is no longer possible to uniformly maintain the accuracy of the press processing machine.

Therefore, another object of the present invention is to automatically operate the press machine only when the conductive workpiece is placed in the correct position, thereby increasing the precision of the press process.

Hereinafter, the present invention will be specifically explained based on an embodiment shown in the drawings.

First, the present invention is based on the existence of a pedal-operated press machine 1.

As shown in FIG. 1, this press machine 1 operates a clutch lever 3 by depressing a pedal 2, and a processing table 4.
The workpiece 6, which is a good electrical conductor, is set at a regular processing position in a pair of upper and lower molds 5a and 5b, and press processing such as drilling is performed on the workpiece 6, which is a good electrical conductor.

The operation control device 10 of the present invention is shown in FIGS.
As shown in the figure, a fixed stopper 7 for positioning the workpiece 6 on the processing table 4 and a stopper 7 electrically connected to the workpiece 6 at the normal processing position and using a spring 8 to position the workpiece 6 A detection pin 9 energized in the direction of pressure contact with the end face is provided, and a movable base 20 is installed on the processing table 4 so as to be movable forward and backward by a drive cylinder 11. A connecting pin 12 that can be electrically connected to the detection pin 9 is provided,
Furthermore, the workpiece 6 at the regular machining position, the above-mentioned stopper 7, the detection pin 9. A detection circuit 15 is formed by a power supply 13 and a relay 14 including a connecting pin 12, the output of the relay 14 of this detection circuit 15 operates a control valve 16, and the working fluid 17 from this control valve 16 operates a control cylinder 18. The cylinder rod 1 of this control cylinder 18
The pedal 2 is depressed by the forward and backward movements of 9.

Of the pair of molds 5a and 5b, the lower mold 5a is fixed to the processing table 4, and the upper mold 5b is fixed to the support rod 2.
1 and a spring 22 to allow vertical movement.
A punch 23 for punching the hole is provided below it.

The workpiece 6 is a guide bar 2 between the molds 5a and 5b.
4 to a position where it abuts the stopper 7.

At this time, the detection pin 9 is provided, for example, on the side of the guide bar 24, and comes into contact with the end surface of the workpiece 6 by the pressing force of the spring 8.

Here, the detection pin 9 and the guide bar 24 are supported by an electrically insulating holder 25.

This holder 25 holds a stopper 7, which is a good electrical conductor, on its front side, and a contact plate 26, which is electrically connected to the detection pin 9, on its back side.

Further, the movable base 20 is held at a rear position of the holder 25 so as to be able to move forward and backward on the processing table 4, and holds a support 27 on its upper surface.

The support 27 holds a pin case 28 made of an insulator, and this pin case 28 holds the connecting pin 12 that can be electrically contacted with the contact plate 26 on its front surface.

A portion of the connecting pin 12 protrudes from the front surface of the pin case 28, and is always urged in the protruding direction by a coil spring 29.

A drive cylinder 11 for driving the movable base 20 is attached to the frame 30.

A bracket 31 is attached to this frame 30, and this bracket 31, together with a pull spring 32, biases the pin case 28 in a direction to draw it rearward.

Further, the connection pin 12 is connected to the detection circuit 15 by the code 33.
has reached.

Next, the detection circuit 15 connects the primary winding of the power transformer 34 to the power supply 13 as shown in FIG. Connect 7.

In this way, the workpiece 6, the stopper 7, the relay coil 14a, the secondary winding of the source transformer 34, the connecting pin 12. Contact plate 26 and detection pin 9 form a closed electrical circuit.

The contact point 14b of the relay 14 is connected in series to the power source 13 together with the operating section 16a of the electromagnetic control valve 16, for example.

Control valve 16 also sends working fluid 17 to control cylinder 18 .

Here, the control cylinder 18 is attached to the press machine 1 by a mounting bracket 35, and its cylinder rod 19 corresponds to the upper surface of the pedal 2.

Next, the operation will be explained.

First, with the mold 5at5b set on the processing table 4, the drive cylinder 11 is operated, the movable base 20 is advanced as shown by the imaginary line, and the connecting pin 12 is brought into electrical contact with the contact plate 26. let

In this state, the power transformer 34 applies a voltage of, for example, about 12 (V) between the stopper 7 and the detection pin 9.

Here, the operator inserts the conductive workpiece 6 into the guide bar 24 and places it at a predetermined processing position.

At this time, the stopper 7 hits the tip of the workpiece 6 and stops the insertion at the normal processing position.

Therefore, the stopper 7 and the conductive workpiece 6 are electrically connected.

Moreover, in the normal machining position, the workpiece 6 is located at the detection pin 9.
touch the tip of the

Since the detection pin 9 is freely retractable and retractable by the spring 8, it is always electrically connected to the end surface of the workpiece 6.

Only when the workpiece 6 is placed at the correct machining position in this manner, the detection pin 9. The workpiece 6 and the stopper 7 will be electrically connected.

As a result, the stopper 7, the workpiece 6 and the detection pin 9
As a result, the relay 14 is energized and closes its relay contact 14b.

Therefore, the control valve 16 is activated, and the working fluid 17 is supplied to the control valve 1.
6 into the control cylinder 18.

In this way, the control cylinder 18 causes the cylinder rod 19 to protrude, and the pedal 2 is depressed by its pressing force.

By depressing the pedal 2, the clutch lever 3 is operated, and the press processing machine 1 lowers the mold 5b, and the punch 2
3, a hole is drilled at a predetermined position on the workpiece 6.

Now, when the size and hole opening of the workpiece 6 changes, or when the molds 5a and 5b are replaced,
The movable base 20 is retracted to facilitate the work.

Moreover, the forward position of this movable base 20 is the drive cylinder 1.
1 can be set to any position, so even if the length of the workpiece 6 or its processing position changes, the operation control device 10 can be adjusted to an appropriate state and used.

According to the present invention, the pressing down of the pedal of the press processing machine can be performed by the output of the control cylinder, etc., so the fatigue of one-legged operation of this type of press machine can be reduced, and the workpiece can be placed in the correct position. The detection circuit emits an output only when it is set, so processing accuracy is uniformly improved and the occurrence of defective products can be prevented.
Furthermore, since the movable base is provided so that it can move forward and backward, even if the shape of the workpiece or the position of the workpiece changes,
Since the electrical connection parts are used in a state that matches the processing conditions, it is possible to process all kinds of workpieces.

[Brief explanation of the drawing]

Fig. 1 is a side view of the press processing machine to which the present invention is applied, Fig. 2 is a partially cutaway side view of the operation control device, Fig. 3 is a front view of the detection part, and Fig. 4 is a circuit diagram of the detection circuit. It is. 1...Press processing machine, 2...Pedal,
3...Clutch rod, 4...Processing table, 5
a, 5b...Mold, 6...Workpiece,
7... Stopper 8... Spring, 9... Detection pin, 10... Actuation control device, 11... Drive cylinder, 12... ...
...Connection pin, 13...Power supply, 14...
・Relay, 15...Detection circuit, 16...
・Control valve, 17... Working fluid, 18...
- Control cylinder, 19... Cylinder rod, 20... Movable base.

Claims (1)

[Scope of Claim for Utility Model Registration] In a press machine that presses a conductive workpiece by actuating a clutch lever by pressing a pedal, positioning the workpiece on the processing table of the press machine. A fixed stopper for the workpiece and a detection pin that is electrically in contact with the workpiece at the normal machining position and biased by a spring in the direction of pressing against the end face of the workpiece are provided, and a movable stopper is provided on the workbench. A base is installed to be movable forward and backward by a drive cylinder, and the movable base is provided with a connecting pin that can be electrically connected to the detection pin when the movable base moves forward, and furthermore, the workpiece at the normal machining position, the stopper. A detection circuit is formed together with a power supply including a detection pin and a connecting pin, the output of this detection circuit operates a control valve, the working fluid from this control valve controls a control cylinder, and the cylinder rod of this control cylinder is operated. An operation control device for a press processing machine, characterized in that the pedal is depressed by forward and backward movements of the press machine.