SU1176994A1 - Arrangement for hydraulic stamping of hollow parts - Google Patents

Description

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The invention relates to the stamping of tubular billet with the liquid and can be used in the manufacture of complex-shaped hollow parts.

The purpose of the invention is to reduce the axial draft of the workpiece, reduce the size of the device and reduce energy costs.

The drawing shows a diagram of the device for hydraulic stamping About hollow parts ...

The semi-matrices 1 and 2 with the blanks 3 placed in them are closed using a hydraulic cylinder 4, which is driven by a pumping station 5. The axial compression of the blank 3 is carried out by rigid axial punches 6, which are attached to the ends of the plungers 7 of the hydraulic cylinders

8. Each axial cylinder 8 has two 20 separate coaxial cavities. Into the cavity

And serves the liquid from the pumping station.

9. A cavity B is supplied with pressurized fluid from the high pressure cavity of the multiplier 10, which is driven from pump station 11. In the cylinder 8, a plunger 7 moves, having two rods arranged coaxially on both sides of the piston. In the plunger 7 and the plunger 6, there is an axial channel connecting the cavity of the cylinder B with the cavity of the workpiece. One of the plunger rods moves in the high-pressure cavity.

B, separated from cavity A by a seal 12. When the workpiece is axially compressed, the ends of the punches 6, the outer projections, are inserted into the ends of the workpiece and seal its cavity. Thus, the liquid under pressure P acts on the ends of the punches 6, sealing the cavity of the workpiece, creating a counter-pressure equal to

, p | (.

 The outer diameter of the stem of the plunger 7 moving in the cavity B is equal to the diameter of the end part of the punch, sealing the cavity of the workpiece. Thus, the fluid under pressure P in the cavity B of the cylinder 8 acts on the end of the plunger rod 7 with a force equal to

I.).

The forces of counter pressure on the end face of the punch 6 and the stem of the plunger 7 are the same and oppositely directed. The back pressure on the end face of the punch 6 is compensated by the pressure on the end face of the stem of the plunger 7 moving in the cavity B, which reduces the overall force of the axial compression of the workpiece.

The proposed device makes it possible to reduce the force of axial compression of the workpiece when stamping hollow parts such as tees by 25–30%, and when stamping hollow parts such as the body of the rear axle of a car by 18–20%. This makes it possible to reduce the diameter of the ram axle cylinders when stamping hollow parts such as tees by 14-17%, and when stamping hollow parts such as the body of the rear axle of a car by 10-12%, the energy costs of stamping are reduced by 18-30%.

Claims (1)

DEVICE FOR HYDRA-STAMPING OF HOLLOW PARTS, containing a detachable matrix for accommodating the workpiece, coaxially mounted punches for face upsetting of the workpiece, as well as water for moving the punches, each. of which it is made in the form of a cylinder with two coaxially arranged high and low pressure cavities and a piston located in the low pressure cavity with two rods in which an axial channel is made for connecting the high pressure cavity with the matrix cavity, characterized in that, with in order to reduce the axial upsetting force of the workpiece, reduce the device size and reduce energy costs, the outer diameter of the rod located in the high-pressure cavity is made equal to the diameter of the end part of the precipitation punch .. (L m Od with CO 4 *> 1,176994