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A metal tube stretching diameter expanding machine and stretching diameter expanding method

A technology of metal pipe and diameter expanding machine, applied in the direction of wire drawing die, mandrel, etc., can solve the problems of complicated process, high input cost, and unfavorable production efficiency, so as to improve the accuracy of outer diameter, improve production efficiency, and improve clamping The effect of firmness

Active Publication Date: 2019-06-21
广东科莱博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high equipment input costs and complicated procedures, which is not conducive to improving production efficiency.

Method used

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  • A metal tube stretching diameter expanding machine and stretching diameter expanding method
  • A metal tube stretching diameter expanding machine and stretching diameter expanding method
  • A metal tube stretching diameter expanding machine and stretching diameter expanding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment metal pipe stretching expanding machine, its structure is as Figure 1 to Figure 4 It is suitable for stretching and expanding the diameter of metal tube blanks such as copper tube blanks, steel tube blanks, and alloy tube blanks. The metal tube stretching and expanding machine includes a sizing outer mold 5; the rear side of the sizing outer mold 5 is provided with a feeding mechanism 1, an inner mold 41, a positioning mechanism 2 for supporting and positioning the tube blank 9, and a positioning mechanism for pushing the tube blank 9. The pipe pushing mechanism 3 for moving the blank 9 and the core rod mechanism 4 for hanging and fixing the inner mold 41; the front side of the sizing outer mold 5 is provided with a drawing mechanism 6 for clamping the tube blank 9 and pulling the tube blank 9 to move, and Feeding mechanism 7.

[0039] Feeding mechanism 1 is positioned at one side of positioning mechanism 2; Feeding mechanism 1 comprises the fee...

Embodiment 2

[0050] The difference between the stretching and expanding machine for metal tubes in this embodiment and the first embodiment is that in this embodiment, a lubricating fluid passage is provided inside the core rod; the lubricating fluid passage is connected to an external lubricating fluid container. When the tube blank and the inner mold move relatively, the core rod can flow out the lubricating liquid to lubricate the surface of the tube hole of the tube blank, so that the surface of the tube hole of the tube blank has good processing quality. The rest of the structure of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0052] The method for stretching and expanding the diameter of the metal pipe in this embodiment includes the following steps:

[0053] In the first step, the tube blank is loaded to the rear side of the sizing external mold, and the tube blank is clamped and positioned so that the axis of the tube blank is coaxial with the axis of the inner hole of the sizing external mold;

[0054] The second step is to move the core rod so that the core rod enters the inner hole of the tube blank until the front end of the core rod protrudes from the tube blank; install the inner mold at the front end of the core rod;

[0055] In the third step, the tube pushing mechanism pushes the tube blank forward from the rear end of the tube blank, so that the front end of the tube blank passes through the inner mold; the tube blank and the core rod are moved forward together until the inner mold reaches the inner hole of the fixed-diameter outer mold and the front end of the tube blank Pass through t...

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PUM

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Abstract

The invention provides a metal pipe stretching and expanding machine. The machine is characterized by comprising a sizing outer die, wherein the rear side of the sizing outer die is provided with a feeding mechanism, an inner die, a positioning mechanism for bearing and positioning a pipe blank, a pipe pushing mechanism used for pushing the pipe blank to move, and a core rod mechanism. The front side of the sizing outer die is provided with a drawing mechanism and a blanking mechanism. The core rod mechanism comprises a core rod and a core rod transmission device. The inner die is detachably arranged at the front end of the core rod. The axis of the inner die, the axis of the core rod and the axis of an inner hole of the sizing outer die are coaxially arranged. The drawing mechanism comprises a drawing clamping portion and a drawing transmission device. According to the metal pipe stretching and expanding machine, automatic production can be achieved, the two technical effects of inner diameter expanding and outer diameter fixing can be completed at the same time, production efficiency is improved, and the metal pipe outer diameter precision is improved. The invention further provides a metal pipe stretching and expanding method. The method can achieve the two technical effects of inner diameter expanding and outer diameter fixing at the same time, achieve automatic production and save labor resources, is high in production efficiency and can improve the metal pipe outer diameter precision.

Description

technical field [0001] The invention relates to the technical field of metal pipe stretching diameter expansion, and more specifically, relates to a metal pipe stretching diameter expanding machine and a stretching diameter expanding method. Background technique [0002] At present, there is a great demand for large-diameter and long-length seamless precision pipes in the market, especially large-diameter seamless precision pipes made of stainless steel, copper and other materials. The traditional processing method of large-diameter seamless precision pipe is to obtain the tube blank by extrusion, piercing or hot rolling, and then reduce the diameter and wall of the tube blank to finally reach the finished product size, but the equipment investment of this processing method is very high. Large, not conducive to reducing costs. With the advancement of technology, there has been a stretching and expanding method to process the tube blank to finally reach the finished product ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C1/24B21C3/02B21C1/28B21C1/30B21C1/32B21C9/00B21C3/16
Inventor 陈朝伟王箫张荣欣
Owner 广东科莱博科技有限公司