Method for controlling pin positioning accuracy by seamless tube extrusion locking pin process

A technology for extruding fixed, seamless pipes, applied in metal extrusion control equipment, metal extrusion, manufacturing tools, etc., can solve the problems of poor control accuracy, long opening and closing time of control valves, etc. Effect

Inactive Publication Date: 2010-06-16
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The original hydraulic needle positioning method mostly adopts the proportional control method for the front and rear chambers of the perforating needle cylinder, but the control accuracy is poor due to the long opening and closing time of the control valve

Method used

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  • Method for controlling pin positioning accuracy by seamless tube extrusion locking pin process
  • Method for controlling pin positioning accuracy by seamless tube extrusion locking pin process

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Embodiment Construction

[0010] Such as figure 1 As shown, the precision control method of the seamless pipe extrusion fixed needle process at least includes: perforated cylinder 1, piston chamber oil inlet valve 2, piston chamber liquid discharge valve 3, piston rod chamber oil inlet valve 4 and piston rod chamber discharge valve The liquid valve 5 is connected with the piston chamber oil inlet valve 2 and the piston chamber liquid discharge valve 3 on the oil path of the piston chamber of the perforated oil cylinder 1, and the piston rod chamber oil inlet valve 4 and the piston rod chamber are arranged on the oil path of the piston rod chamber of the perforated oil cylinder 1. Cavity drain valve 5, the advance and retreat of perforated cylinder 1 are respectively controlled by perforated cylinder piston chamber oil inlet valve 2, piston chamber drain valve 3, piston rod chamber oil inlet valve 4 and piston rod chamber drain valve 5, when the main pump oil Oil comes from source 8, piston chamber oil ...

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Abstract

The invention belongs to the field of metallurgic equipment, relates to a method for controlling pin positioning accuracy for pecker locking in an extruder, in particular to a method for controlling the pin positioning accuracy by a seamless tube extruding locking pin process. The method is characterized by comprising a perforation cylinder, a filling valve of a piston cavity, a drain valve of the piston cavity, a filling valve of a piston rod cavity and a drain valve of the piston rod cavity, wherein an oil path of the piston cavity of the perforation cylinder is connected with the filling valve of the piston cavity and the drain valve of the piston valve; an oil path of the piston rod cavity of the perforation cylinder is provided with the filling valve of the piston rod cavity and the drain valve of the piston rod cavity; and the filling valve of the piston cavity of the perforation cylinder, the drain valve of the piston cavity, the filling valve of the piston rod cavity and the drain valve of the piston rod cavity control the perforation cylinder to move forwards and backwards. The invention provides the method for controlling the pin positioning accuracy by the seamless tube extruding locking pin process capable of improving the response speed of the perforation cylinder and the pin positioning accuracy for pecker locking and the inner surface quality of tubes.

Description

technical field [0001] The invention belongs to the field of metallurgical equipment, and relates to a method for controlling the positioning accuracy of a fixed perforating needle in an extruder, in particular to a method for controlling the positioning accuracy of a seamless pipe extruding fixed needle process. Background technique [0002] In the field of metallurgical equipment, especially in the precision control of the needle positioning process of the seamless pipe extrusion fixed needle process, in the existing double-action extrusion machine, the fixed needle process is divided into two methods: mechanical needle positioning and hydraulic needle positioning. The mechanical needle positioning method has huge equipment and high needle positioning accuracy. The original hydraulic needle positioning method mostly adopts the proportional control method for the front and rear chambers of the perforating needle cylinder, but the control accuracy is poor due to the long ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C31/00
Inventor 张君侯永超薛菲菲丁建文杨红娟
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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