Synchronous punching device in internal high-pressure forming mold

Abstract

The invention discloses a synchronous punching device in an internal high-pressure forming mold. After a pipe fitting to be molded is molded through the internal high-pressure forming mold, a pipe wall in a mold cavity is synchronously punched through a first punch and a second punch; high-pressure liquid in the pipe fitting is used for supporting to guarantee the punching effect; further, the first punch and the second punch are in engaged transmission through gears; on the one hand, the gear transmission guarantees the speed and the displacement transmission synchronism, so that the transmission reliability and the machining precision are improved; and on the other hand, because of angle flexibility of gear engagement, different positions on different planes can be synchronously punched, and the use flexibility is excellent and not limited by the use environment.

Description

technical field [0001] The invention relates to the technical field of pipe fitting processing, in particular to a synchronous punching device in an internal high pressure forming die. Background technique [0002] With the development of automobile lightweight, more and more internal high pressure forming products are used in automobile chassis, body and other structures. Under the action of pressure, by controlling the internal pressure and material flow of the tube blank, the tube blank is expanded radially outward to produce plastic deformation to form a hollow structural part. Many internal high pressure forming products need to process multiple holes for assembly and positioning. The traditional process generally uses drilling and milling, but the drilling accuracy is low and the milling efficiency is low. We are eager for a process with higher forming precision and higher processing efficiency, so the punching hole in the internal high pressure forming die has been w...

AI Technical Summary

Problems solved by technology

[0003] The existing in-mold punching is to install one punching cylinder in one working direction, so it is often necessary to install multiple punching cylinders, but when the punching directions are different and the hole distance is small, there is not enough space to install the required cylinders Quantity, so the existing in-mold punching technology has limitations

The above-mentioned types of holes can only use the existing in-mold punching technology to process a part of the holes in the current processing process, and the remaining holes need to be completed by adding other processes (such as laser cutting, milling, drilling), which not only increases the production cost. The cost and processing efficiency are also lower

Moreover, the number of clamping is increased, and the forming accuracy is also reduced.

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