JPS5917452Y2 - Anti-slip device in press machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for stopping displacement of a piece to be pressed during conveyance and placement in a transfer type press machine.

In this invention, the press operation is automatically started when the piece to be pressed is transported to the pressure receiving location by an automatic conveyance means and is placed in place. , there is a risk that it may shift from its fixed position due to its inertia, so in order to prevent this shift, the piece to be pressed is pressed and temporarily fixed with a bushing pin attached to the upper mold at the same time as the piece to be pressed, that is, it is related to a slip prevention device. be.

Now, one embodiment of this invention will be explained with reference to the drawings. The bushing pin 2 attached to the upper mold 1 of a transfer type press machine is a combination of a double-tube type cylinder using air and a piston, and is inside the main cylinder 3. A sub-cylinder 4 that tightly slides is inserted into the sub-cylinder 4, and an operating pin 6 having a piston 5 at the rear end that can tightly slide inside the sub-cylinder 4 is engaged and inserted. The flanges provided on the outer periphery are formed so that they can come into contact with the locking steps 8 provided on the inner periphery of the cylinder head of the main cylinder 3, and the rear of the operating pin 6 is formed on the inner periphery of the cylinder head 9 of the sub cylinder 4. The front surface of the piston 5 at the end is in contact with each other so that the main cylinder 3 to the sub cylinder 4 and the sub cylinder 4 to the operating pin 6 can be prevented from being pulled out and separated during operation, At the rear end of the main cylinder 3, which is the uppermost stage, there is an air intake port 11 to which a supply pipe 10 from a compressed air supply source is connected.
and an exhaust port 13 connected to an exhaust check valve 12 that operates at a certain pressure is provided on the opposing side periphery.

Depending on the shape of the piece to be pressed, a plurality of such bushing pins 2 that can lock the piece to be pressed are used as appropriate, and the main cylinder 3 is attached to the upper die 1 of a transfer type press machine with the operating pin 6 facing downward. The entire structure is vertical.

This invention is constructed as described above, but as a characteristic of the transfer type press machine, the press process starts at the same time as the piece to be pressed is automatically carried into the pressurizing section by means of a conveying means. The pressurizing upper die takes a descending step to apply pressure at a certain height from the upper surface of the piece to be pressed, that is, during a specific stroke.

However, in the bushing pin 2 of this invention, when the upper mold 1 with the bushing pin 2 attached is in the uppermost position, the entire stroke is in an extended state due to the air, and the piece to be pressed is at the bottom of the lower end of the operating pin 6. A space is provided by the conveying means to the extent that the fixing process is not obstructed, and at the same time as the piece to be pressed is fixed, the upper die 1 is lowered, and the operating pin 6 at the lower end of the bushing pin 2 moves simultaneously with this and lowers. The lower end abuts the piece to be pressed, and the action of the upper die 1, which is still descending, presses a predetermined part of the piece to be pressed and makes it immobile, and the continuing descending action causes the inside of the main cylinder 3 and sub cylinder 4 to The pressure increases, and when it reaches a certain selected internal pressure, the high pressure air is discharged into the atmosphere via the exhaust check valve 12.

As this process progresses, the press work is completed, and the pressurized upper mold, which has finished the casting work, is in the process of rising, but the press pin 2 presses the pressed piece by continuously inserting compressed air. Even if the pressurizing upper die continues to move and the rising pressurizing upper die attempts to move with the rising pressurizing upper die, it also has the effect of promoting the detachment movement of the pressurized piece and the pressurizing upper die, and the pressurizing upper die When raised to a certain desired height, the bushing pin 2 is fully extended again and is pulled upward, and the piece to be pressed is removed from the lower die, completing one process.

In this way, this invention acts as a movement prevention means for the stationary pressed piece, but each member in the bushing pin 2, namely the main cylinder 3 and the sub-cylinder 4
The operating pin 6 can be set to have an arbitrary length of stroke regardless of the shape of the piece to be pressed and the operating stroke of the pressurizing upper mold.

In other words, there are a few types of conventional means for preventing the movement of the pressed piece using coil springs, but these also have a large height difference, that is, a large difference in elevation of the pressurizing die, and the maximum elongation is limited. In order to be able to obtain a pressing action at the same time, a long coil spring is required, and if such a coil spring is used, it may be difficult to use it due to restrictions such as the limit of contraction at the instant of pressure application. The only models that can do this are those with short pressurizing strokes, and it is difficult to maintain a constant degree of suppression of the piece to be pressed by the pressurizing stroke, but in this invention,
The use of a double-tube system that can tolerate all differences in pressure elevation, even if the difference is large or small, and the degree of suppression allows the piece to be pressed to be pressed with constant pressure regardless of the elevation stroke. It is effective.

[Brief explanation of drawings]

The figure is a cross-sectional view showing the bushing pin of the present invention installed in the upper mold of a transfer type press in a fully contracted state. 1...Upper mold, 2...Butushupin, 3
...Main cylinder, 4...Sub cylinder,
5... Piston, 6... Operating pin, 1
0... Supply pipe, 11... Air intake port, 12... Exhaust check valve, 13... Exhaust port.

Claims (1)

[Scope of utility model registration request] An air intake port 11 connected to a supply pipe 10 connected to a compressed air supply source and an exhaust port 12 equipped with an exhaust check valve 12 that operates at a pressure of a certain set value are connected to the upper die 1 of a transfer press machine. 3 is mounted vertically, and is provided with a sub-cylinder 4 that tightly slides within the main cylinder 3, and a piston 5 that can tightly slide within the sub-cylinder 4;
A slip prevention device for a press machine, which is provided with a bushing pin 2 equipped with an operating pin 6 capable of preventing movement of a piece to be pressed.