SU407604A1 - DEVICE FOR HYDROSTATIC PRESSING - Google Patents

Description

one

The invention relates to the processing of metals by hydroextrusion of blanks through a point matrix.

The known devices have a movable matrix and an annular punch with a clamping device placed on it.

However, the known devices do not provide continuous hydrostatic pressing, which reduces plant productivity and product quality.

The aim of the invention is to ensure the continuity of the process and the automatic maintenance of pressure in the container.

To do this, an additional clamping device is fixed in the middle part of the container, which holds the product during the working displacement of the die, in addition, the device is equipped with two hollow plungers covering the circumferential punches and fixed on the hydraulic cylinders and also installed between the hydraulic cylinders and the bed frame.

The invention is illustrated in the drawings.

FIG. 1 shows a diagram of the design of the device; in fig. 2 - cyclogram of the device.

The device for hydrostatic pressing contains a bed 1, on which two hydraulic cylinders 2 and 3, which play the role of hydraulic pillows, a container 4, a fixed gripper 5 fixed in it, an underlying matrix 6, a hollow die 7 mounted on it with a movable gripper 8 mounted on it, two hollow a plunger 9 and 10 fixed to the hydraulic cylinders 11 and 12 supported on the frame through the hydrocyliidr 2 and 3.

The device works as follows.

In the initial position, the punch 7 with the gripper 8 is in the extreme right position, the iolot A and the cavity B are under pressure, the matrix 6 moves from right to left, and by this time it has reached the established velocity; Cavities C and D are under pressure.

In the ti-4 segment (see Fig. 2), pressure is released in the cavities L and B. The fixed gripper 5 is locked, the gripper 8 is opened, and the matrix 6 is shifted from right to left at a constant speed Vi defined by the matrix 6 next slide valve.

The area produces a quick withdrawal of the punch 7 with the grip 8 to the extreme left position, for which pressure is supplied to the floor D.

In the is- / 4 region, the pressure in the cavity L and B rises, the movable gripper 8 is locked, the fixed gripper 5 is opened.

In the section / 4-4, the speed of movement of the movable gripper 8 increases from zero to 2 V,

and the speed of movement of the matrix 6 decreases to zero, and then from the leftmost position it begins to move in the opposite direction, reaching the speed V at the end of the section. At that, the difference between the speeds of movement of the movable gripper 8 and the matrix 6 remains constant and equal to V.

In the area, the movable gripper 8 moves from left to right with a speed of 2 V, the matrix moves in the same direction with a speed of V.

In the te-ti region, the movement speed of the gripper 8 decreases to zero. At the same time, the matrix 6 smoothly stops and begins to move in the opposite direction.

Subject invention

Claims (2)

1. A device for hydrostatic pressing of long articles, comprising mounted on the bed container and located on both sides of the hydraulic cylinders with pistons, on one of which is mounted a ring punch with a clamping device, and on the second - a matrix, characterized in that, in order to ensure continuity of the process, an additional clamp is fixed in the middle part of the container device that holds the product during the working movement of the matrix. 2. A device according to claim 1, characterized in that, in order to automatically maintain the pressure in the container, it is provided with two hollow plungers covering the circumferential punches and fixed to the hydraulic cylinders and also installed between the hydraulic cylinders and the bed frame. -SNG Cycle time Phi g 2