Quick connecting device for punch top and mandril of perforator

Abstract

The invention discloses a quick connecting device for a punch top and a mandril of a puncher, and relates to a perforating tool of a seamless steel tube perforator. The quick connecting device comprises the punch top, the mandril and a loose joint connecting the punch top and the mandril, wherein the loose joint consists of a punch top loose joint and a mandril loose joint; one end of the punch top loose joint is provided with outside threads, while the other end is a guide cone of which the outer wall is provided with an annular groove, and the end with the threads is connected with the punch top; one end of the mandril loose joint is provided with outside threads, while the other end is a guide taper hole matched with the guide cone, the guide taper hole is provided with a pin hole corresponding to the annular groove in the horizontal direction of the taper hole, and the end with the threads is connected with the mandril; and the cone of the punch top loose joint is inserted into the guide taper hole of the mandril loose joint, and the overlapping position of the annular groove of the punch top loose joint and the pin hole of the mandril loose joint is provided with a positioning pin roll. The quick connecting device can meet the requirement of quick replacement of the punch top on line, improves production efficiency, and can be recycled to reduce production cost.

Description

technical field [0001] The invention relates to a piercing tool for a seamless steel pipe piercing machine, in particular to a connecting device between a plug and a push rod, which is a main deformation tool. Background technique [0002] As the most critical equipment in the whole pipe rolling mill, the piercer works decisively on the quality of the finished product and the productivity of the whole mill. As one of the main deformation tools of the piercer, the quality and replacement time of the plug directly affect the piercing quality and piercing efficiency. For the internal water-cooled plug used in the φ100 and below units of the prior art, such as figure 1 Shown: top 1 and push rod 2 are connected by a union 3 that both ends are threads. One end thread of the union 3 is connected with the push rod 2, and the other end thread is connected with the plug 1. When replacing the top head online, the top head is directly removed, and the union is still connected to the ...

AI Technical Summary

Problems solved by technology

Due to the increased mass of the plug, workers often cannot align the thread of the plug with the thread of the union when installing the plug, and it is also difficult to rotate the plug when screwing the thread

Since the thread of the plug and union is getting tighter and tighter, it is more difficult to disassemble and often cannot be screwed.

And because the surrounding space is small, large disassembly tools cannot be used, so it is very inconvenient to replace

Usually, the ejector rod has to be replaced with the head, which not only increases the workload but also takes up production time

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