Steel pipe sizing mill capable of adjusting pipe diameter size

Abstract

The invention provides a steel pipe sizing mill capable of adjusting pipe diameter size. The steel pipe sizing mill comprises a cylindrical rack body, wherein the rack body is provided with two fixed roller components and a movable roller component, an equilateral triangular shape is formed by axes of the three roller components, the rack body which is arranged at the outer side of the movable roller component is provided with a limiting baffle plate, a threaded through hole which is in fit with a jackscrew is formed in the middle part of the limiting baffle plate, the jackscrew penetrates through the limiting baffle plate and is in contact with the outer wall of the movable roller component, a plurality of springs are connected between the movable roller component and the limiting baffle plate, and the outer circumference of the rack body is also uniformly provided with a plurality of locating grooves. The steel pipe sizing mill provided by the invention has the beneficial effects that not only does the steel pipe sizing mill has the advantages of simple structure, convenience in operation, high processing efficiency and the like, but also the cylindrical rack body is adopted, design reference and installation reference are unified, the structure of the steel pipe sizing mill is more reasonable, the locating accuracy is increased, the manufacturing technology is simplified, the manufacturing cost is reduced, and the surface quality and the straightness accuracy of a hot-rolling seamless steel pipe are ensured.

Description

[0001] technical field [0002] The invention belongs to the technical field of steel pipe processing equipment, in particular to a steel pipe sizing machine with adjustable pipe diameter. Background technique [0003] At present, the use of seamless steel pipes in the national economy is becoming more and more common, involving various industries such as petroleum, machinery, and chemical industry, and sizing machines are necessary equipment for the production of seamless steel pipes. The sizing machines that produce hot-rolled seamless steel pipes in my country at this stage all use a square frame body, and three roll parts are installed in the frame body, and the three rolls of the three roll parts form the pass pattern of rolling seamless steel pipe The center line of the steel pipe is the center line of the finished seamless steel pipe, so all sizing machines should be based on this center line in design, manufacture and installation. The design basis is the center...

AI Technical Summary

Problems solved by technology

The design basis is the center line of the pass formed by the three rolls, and the installation basis is several horizontal or vertical positioning surfaces, which makes it difficult to process these positioning surfaces during the manufacturing process (usually milling) with steel pipes. The center line of the center line reaches the required dimensional tolerance and shape tolerance, which makes the processing technology of the frame body more complicated, and the positioning accuracy is not high, which directly affects the surface quality and straightness of the hot-rolled seamless steel pipe, so that the heat It is difficult to improve the overall quality of rolled seamless steel pipes

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