SU457619A1 - Press for fair cutting - Google Patents

Description

one

The invention relates to the field of equipment for finishing punching of SHEET material.

A press for finishing cutting of sheet material is known, comprising a table, a clamping unit made in the form of a ram with a plunger, and a slide with a rod carrying a punch and placed in the cavity of the cylinder inside the plunger coaxially with the latter.

The purpose of the invention is to reduce the load on the drive of the press ram.

This is achieved by the fact that the pressure cylinder body is fixed on the press table, and the cylinder itself is provided with an additional plunger mounted on the rod, mounted in the cylinder at the end opposite to the end, at which the first plunger is located, and having the ability to move regardless of the movement of the first plunger during the slide movement.

The drawing shows a press with a clip and a slider.

The press FOR fair cutting includes a bed 1 with a TABLE 2 and a slider 3 located under the TABLE. The clamping unit has a POWER cylinder with a housing 4 fixed on the table 2 and a plunger 5 carrying the clamp (not shown).

On the press slider 3, a rod 6 is rigidly fixed, mounted coaxially with the actuating cylinder inside the plunger 5 and connected with a pin 7 and clamp 8 with a punch (not shown) and a plunger. Concentric to the rod 6 in the cavity “A of the power cylinder”, an additional plunger 9 is installed, made in the form of a sleeve, which interacts with the end face with a slider 3. The rod 6 is hollow and inside it is placed a safety washer 10 and inserts 11 and 12.

When preparing the press for operation, the cavity, "A, is filled with a liquid under a pressure of 5-10 kg / cm, after which the clamping unit comes to a tight state in which

the housing 4 is pressed against the table 2 of the press since the movement of the plunger 5 of the cylinder is limited by the collar of the rod 6. When the slide 3 is moved along with the rod 6, the plunger 5 also moves, on which a cutting chip is mounted (not shown).

After clamping the processed material between the clamps, one of which is mounted on the plunger 5, and the other (not shown) on the base 1 of the press, the movement of the plunger 5 stops. As the slider 3 continues to move, approaching the material being processed, the additional plunger 9, which interacts with the end face with the plunger, compresses the fluid in

CAVITY "A" to a predetermined pressure, depending on the pressing force during cutting, limited by a safety valve (not shown).

Upon further movement of the sliding head, part of the liquid from the cavity "A is squeezed out through the safety valve to the drain, and the cutting punch mounted on the washer 8 cuts the part. When cutting the collar rod 9 departs from the collar of the plunger 5.

When the slide 3 moves from the material being processed, the plunger remains stationary, pressing the material against the clamp on the press frame (fluid pressure in the cavity "A is not relieved"), and the punch exits the material. As soon as the collar of the rod 6 is in contact with the collar of the plunger 6, the latter, and with it the stamp begins to fall, squeezing the liquid out of the cavity "A. The plunger 5 and the stamp come to their original position.

During further operation, the cycle is repeated.

Subject invention

A press for finishing punching of sheet material, containing a table, a clamping unit made in the form of a ram with a plunger, and a slide with a rod carrying a punch and placed in the cavity of the cylinder inside the plunger coaxially with the latter, characterized in that, in order to reduce loads on the drive of the press ram, the cylinder body is fixed on the press table, and the cylinder is provided with an additional plunger enclosing the rod mounted in the cylinder cavity at the end of the cylinder opposite to the previously mentioned plunger possibility of independent movement of said plunger during movement of the slider and cooperating with the end face of the latter.