Punching die, system punching device and stepwise punching method

Abstract

The invention discloses a punching die, a system punching device and a stepwise punching method. The punching die comprises an upper die carrier, a lower die carrier, an outer guide post bushing assembly and a first station assembly, wherein the first station assembly is positioned between the upper die carrier and the lower die carrier, and comprises a first punching male die, a first mandril, afirst lower module positioned on the top of the lower die carrier, a first pressure plate positioned on the top of the first lower module, and a pressure plate force assembly with longitudinal retractility; and one end of the pressure plate force assembly is connected to the bottom of the upper die carrier, and the other end orients to the top of the first pressure plate. In the system punching device, a second station assembly is arranged in the punching die. When the system punching device is used for punching, a product is placed into the first station assembly for performing first punching, and then placed into the second station assembly for clamping an existing hole with a positioning device to perform second punching after hole positioning. Through adoption of the punching die, thesystem punching device and the stepwise punching method, the positioning accuracy can be improved; the loss of the die is reduced; and the punching quality and production efficiency are improved greatly.

Description

technical field [0001] The invention relates to the technical field of stamping, in particular to a punching die, a system punching device and a step-by-step punching method. Background technique [0002] There are many pipe fittings in modern equipment that need to be drilled. Compared with machining drilling, using die punching to form through holes on various pipes can greatly save processing costs and improve production efficiency. It can reduce the generation of burrs and chips during the processing and improve the processing quality. However, as the wall thickness of the pipe increases, the punch force applied to the pipe by the punching punch will also increase. For this reason, the punch must always be very precisely aligned with the hole on the mandrel during the punching process, otherwise it will easily cause the hole position. Misaligned or broken punches. In the existing punching dies, after the pipe is put on the mandrel and before the punching punch is punch...

AI Technical Summary

Problems solved by technology

However, as the wall thickness of the pipe increases, the punch force applied to the pipe by the punching punch will also increase. For this reason, the punch must always be very precisely aligned with the hole on the mandrel during the punching process, otherwise it will easily cause the hole position. Misaligned or broken punch punches

In the existing punching dies, after the pipe is put on the mandrel and before the punching punch is punched down, the position of the pipe during processing is usually locked by relatively simple methods such as fixing one end of the pipe or pressing the pipe by its own weight. In this method, it is difficult to ensure that the pipe with a relatively thick wall thickness does not deviate during the punching process, because the distance between the pipe and the mandrel is very small, once the pipe deviates, it will drive the mandrel or the punch to deviate, and the Affect the alignment accuracy of the punch and the hole on the mandrel, the final punching failure or affect the punching quality, increase the consumption rate of pipes and processing accessories

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