Energy accumulator tank forging forming process and extrusion die

Abstract

The invention provides an energy accumulator tank forging forming process which comprises the step of carrying out primary extrusion, secondary extrusion and third time of extrusion on a bar stock in sequence to form a goblet blank finished product with one end opened and the other end closed, wherein a step is arranged on the outer wall of the opened end of the goblet blank finished product; a boss is arranged on the inner end face of the closed end; a blind hole is formed in the outer end face of the closed end; the blind hole is opposite to the boss. Compared with the prior art, the energy accumulator tank forging forming process is simple in working procedure and high in material utilization rate, and has the advantages of reducing the production cost, preventing the parts from decarburization, improving the strength of the parts and improving the production efficiency.

Description

technical field [0001] The invention relates to a cold forging forming process of a cup-shaped member, in particular to a forging forming process of an accumulator tank body for an automobile. Background technique [0002] An accumulator is an energy storage device in a hydropneumatic system. It can store the excess pressure generated during the periodic operation of the hydraulic system into compression energy or potential energy, and when the system needs it, convert the compression energy or potential energy into hydraulic or pneumatic energy and release it to replenish the supply system . In general, the accumulator is basically composed of four parts: the tank body, the interlayer, the compressible gas on the interlayer, and the working liquid under the interlayer. The tank body is an important part of the accumulator components, and it bears relatively high pressure in the working state. The forming methods of the tank body include early machining forming and cold-t...

AI Technical Summary

Problems solved by technology

This process adopts cold-temperature combined forging. In the heating and reverse extrusion process, the billet needs to be heated to 800-850°C before forming. However, this heating temperature can easily cause decarburization on the surface of the part and reduce the fatigue strength, resulting in premature failure of the part during use. Fatigue damage occurs; moreover, the process also needs to invest in high-cost heating equipment to bring greater pressure to the production enterprise

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