A method for measuring and adjusting the center of a steel pipe hot extrusion machine

Abstract

A center measurement and adjustment method for a steel pipe heat extruder includes the following steps that firstly, a mandrel and a connection rod on a mandrel beam are detached, and a connection thread at the bottom of the mandrel beam is exposed; secondly, a reference steel wire is pulled with the two points of the center of the connection thread at the bottom of the mandrel beam and the center of a front beam as references; thirdly, concentricity deviation data of an extrusion die, an extrusion cylinder and an extrusion beam are measured respectively with the reference steel wire as the reference; and fourthly, the concentricity deviation is regulated by adjusting the installation positions of the extrusion die, the extrusion cylinder and the extrusion beam so that the technical requirements can be met. The method solves the problem that different concentricity degrees are generated due to movement abrasion between the extrusion die, the extrusion cylinder, the extrusion beam, the mandrel beam and other parts of the steel pipe heat extruder, and the device accuracy is restored.

Description

technical field [0001] The invention relates to a steel pipe manufacturing process, in particular to a center measurement and adjustment method for a steel pipe hot extrusion machine. Background technique [0002] High-end seamless steel pipes, such as: 690 seamless steel pipes for nuclear power, oil well pipes for oil drilling, etc., all need to be produced by forging, reaming, extrusion and other processes to achieve the required mechanical properties. The 60MN extruder is the key process equipment in the production process of hot extrusion of steel pipes, see figure 1 , which includes a rear beam 1, an extrusion beam 2, a mandrel beam 3, a tie rod beam 4, an extrusion cylinder 5, an extrusion die 6, a hot saw 7, a front beam 8, a guide rail 9 and other components. [0003] The working process of the 60MN extruder is: [0004] The feeding manipulator places the heated steel pipe blank in front of the extrusion cylinder 5; the mandrel beam 3 pushes the extrusion beam 2 to...

AI Technical Summary

Problems solved by technology

[0008] 1. Using this method to measure the concentricity of the relevant parts of the extrusion machine, only the concentricity data in the horizontal direction can be measured, and the concentricity data in other directions cannot be measured

[0009] 2. Using this method to measure the concentricity of the relevant parts of the extrusion machine, the measurement work is complicated, the required measurement tools are more, the required measurement time is longer, and the requirements for the measurement personnel are higher

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