Ejector rod of seamless steel pipe perforating machine

A technology of seamless steel pipe and piercing machine, which is used in metal rolling, manufacturing tools, mandrels, etc., can solve the problems of continuous jumping of the ejector rod and unstable positioning of the center of the ejector head, so as to improve the accuracy of wall thickness and prolong the life of parts and components. Effect

Inactive Publication Date: 2017-06-13
苏州容合易工业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: how to solve the problem that the ejector rod jumps continuously during the piercing process, resulting in unstable positioning of the center of the plug

Method used

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  • Ejector rod of seamless steel pipe perforating machine
  • Ejector rod of seamless steel pipe perforating machine
  • Ejector rod of seamless steel pipe perforating machine

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Experimental program
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Embodiment Construction

[0018] Such as figure 1 As shown, the traditional ejector rod used in the production of seamless steel pipes is composed of a plug, a connecting rod, a connecting section and a cooling water pipe. Internal water cooling; the connecting section rotates rapidly with the tube blank during the rolling process of the tube blank, and several sets of guide rollers of the three-roller guide device that can be opened and closed restrict the ejector rod from bending when it bears a large thrust. Due to the rapid rotation and the opening and closing of the guide rollers during the piercing and rolling process, the ejector rods continuously jump, resulting in unstable positioning of the center of the plug, which affects 1. The accuracy of the product wall thickness; 2. The three-roller guide device zero Component life is reduced.

[0019] Such as figure 2 As shown, in order to solve the problems existing in the prior art, the invention improves the traditional mandrel, and divides the ...

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Abstract

The invention relates to the technical field of seamless steel pipe perforation, in particular to an ejector rod of a seamless steel pipe perforating machine. The ejector rod comprises a hollow conical ejector head, a cylindrical connecting rod with an internal cylindrical hollow cavity, a connecting section, a three-roller guiding apparatus and a cooling water pipe, wherein the connecting rod is connected with the ejector head by virtue of a bolt, the connecting section is connected with the connecting rod by virtue of a bolt, the three-roller guiding apparatus is installed at the outer side of the connecting section, the connecting section consists of a first connecting section, a second connecting section, a combination of N third connecting sections and the second connecting section and a tail rod section, which are successively connected with one another. The connecting section of a traditional ejector rod is divided into a plurality of sections, a bearing is installed on the second connecting section, so that the second connecting section and the third connecting section can be increased according to a perforating length, and the dynamic unstable contact between the ejector rod and a guiding rod when in rolling can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of seamless steel pipe piercing, in particular to an ejector rod of a seamless steel pipe piercing machine. Background technique [0002] The traditional ejector rod used in the production of seamless steel pipes is composed of a plug, a connecting rod, a connecting section and a cooling water pipe. Internal water cooling ( figure 1 ); the connecting section rotates rapidly with the tube blank during the rolling process of the tube blank, and the guide rollers of several sets of three-roll guide devices that can be opened and closed restrict the ejector rod from bending when it bears a large thrust. Due to the rapid rotation and the opening and closing of the guide rollers during the piercing and rolling process, the ejector rods continuously jump, resulting in unstable positioning of the center of the plug, which affects 1. The accuracy of the product wall thickness; 2. The three-roller guide device zero ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B19/04B21B25/00
CPCB21B19/04B21B25/00
Inventor 程飞生张辉姚俊丽
Owner 苏州容合易工业科技有限公司
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