Extrusion die for accumulator tank body

Abstract

The invention provides an energy accumulator tank extrusion die. The die comprises a male die seat, a punch and a female die; the punch comprises an annular punch body and a punch core capable of being arranged in an inner cavity of the annular punch body in a penetrating manner, the upper end of the annular punch body is fixedly connected to the lower end face of the male die seat, and when the punch core is pressed in the vertical direction, the punch core can vertically slide relative to the annular punch body; the female die is an annular columnar body and is located below the punch; an upper die cavity and a lower die cavity capable of facing the punch are formed by the female die, and the inner diameter of the lower die cavity is smaller than that of the upper die cavity; a gap exists between the upper die cavity and the punch, and a gap exists between the lower die cavity and the punch; and the outer diameter of the annular punch body is matched with the inner diameter of the upper die cavity, and the outer diameter of the punch core is smaller than the inner diameter of the lower die cavity. The energy accumulator tank extrusion die can effectively prevent the phenomenon that in the extrusion process of the bottom of a cup-shaped blank, bending deformation happens, the upper hole diameter and the lower hole diameter of a hole cavity of the cup-shaped blank are completely consistent, and the coaxiality of a finished product is ensured.

Description

technical field [0001] The invention relates to a forging die for a cup-shaped member, in particular to an extrusion die for an accumulator tank body used in automobiles. Background technique [0002] The accumulator is an energy storage device in the hydraulic pneumatic system, which can convert the excess pressure generated during the periodic operation of the hydraulic system into compression energy or potential energy and store it. When the system needs it, the compression or potential energy can be converted into Energy forms such as hydraulic pressure or air pressure are released to re-supply the system. Generally, the accumulator is 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, and it bears relatively high pressure in the working state. [0003] see Figure 1A and Figure 1B , which shows a structure of an accumulator ...

AI Technical Summary

Problems solved by technology

[0008] 1. Both the punch core 202 and the annular punch 201 are fixedly installed on the punch seat. When the bottom of the cup-shaped blank 100b is squeezed into the lower die cavity 204, due to the limitation of its own length, the punch core 202 can no longer touch The bottom of the cup-shaped blank 100b causes the bottom of the cup-shaped blank 100b to lose the pressure support of the punch core 202, resulting in an imbalance of its upper and lower pressures, which easily causes the bottom edge of the cup-shaped blank 100b to bend upward

[0009] 2. After the bottom of the cup-shaped blank 100b is squeezed into the lower die cavity 204, the punch core 202 is only in contact with the upper part (the part located at the upper die cavity 203) of the cavity inner wall of the cup-shaped blank 100b, and the cavity inner wall Because the lower part (the part located in the lower die cavity 204) loses the lateral support of the punch core, its aperture will inevitably be compressed and become smaller, thus causing the upper and lower apertures of the cavity of the cup-shaped blank 100b to be inconsistent, eventually destroying the accumulator Concentricity of tank products

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