Special-shaped piston multi-punch oil cylinder device and design method thereof

Abstract

The invention provides a special-shaped piston multi-punch oil cylinder device. The special-shaped piston multi-punch oil cylinder device comprises a cylinder body, piston assemblies, an oil valve switching block and sealing rings; the piston assemblies are arranged in the cylinder body, each piston assembly comprises a special-shaped piston and a piston rod, and a sealed space formed by the piston assemblies and the cylinder body is used for bearing the effect of oil pressure; the oil valve switching block is arranged at the bottom of the cylinder body and is used for transferring an oil circuit port from the bottom of the cylinder body to the side surface of the cylinder body; the sealing rings are arranged at the bottoms of the special-shaped pistons; and the oil cylinder is used for punching, and holes are one or more special-shaped holes. According to the special-shaped piston multi-punch oil cylinder device, not only is the number of the punched holes large, and the shapes of theholes are various, but also the whole device is easy to install and operate, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of punching oil cylinder devices in hydroforming dies, in particular to a special-shaped piston multi-punch oil cylinder device and a design method thereof. Background technique [0002] In the existing hydraulic punching technology, ordinary punching cylinders can only process one in-mold punching hole with a single cylinder mechanism. Although some can punch two holes at the same time, the differences in the size and shape of these holes cannot be too large. Large, and the number should not exceed three at most, otherwise it is easy to cause bad results such as punching depressions and easy breakage of punching needles. [0003] The piston structure of the conventional perforated cylinder is circular, and there is only one piston rod; this structure has the following disadvantages: first, the force center of the single-piston cylinder can only be distributed in the center of the piston rod, and for holes w...

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Problems solved by technology

[0006] In view of the above-mentioned problems in the prior art, the present invention proposes a special-shaped piston multi-punch oil cylinder device and its design method, which are used to solve the technical problems in the prior art that the number of punching holes in the oil cylinder is single and the installation and operation are complicated

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