Stretching core head for hollow metal pipe

A technology of hollow metal tubes and core heads, applied in the direction of the mandrel, etc., can solve the problems of poor internal and external surface quality, scrapping of drawing dies, high friction, etc., to improve service life and processing rate of drawing passes, and ensure dimensional accuracy , good lubricating performance

Inactive Publication Date: 2008-02-13
GAOXIN ZHANGTONG
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AI Technical Summary

Problems solved by technology

The shortcoming of the drawing mandrel head of this hollow metal pipe is: when the drawing mandrel head of this hollow metal pipe material is stretched, the frictional force between the drawn hollow metal pipe material and the deformation section of the drawing mandrel head is large, The amount of lubricating oil consumed is large, so that the deformation section and the sizing section cannot be fully lubric...

Method used

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  • Stretching core head for hollow metal pipe
  • Stretching core head for hollow metal pipe

Examples

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Embodiment Construction

[0012] As shown in Figure 1, the drawing core 5 of the hollow metal pipe includes a sizing section 1, an outlet chamfering section 2 arranged on one side of the sizing section 1, and a Deformation section 3 inclined upwards. The sizing section 1 is conical with a certain taper, and the end close to the deformation section 3 is a large diameter end. On the other side of the deformation section 3 there is also an inlet chamfer section 4 .

[0013] The drawing core head 5 of the hollow metal pipe of the above structure is used for the working process of straight drawing: firstly, the drawing core head 5 of the hollow metal pipe is fixed on the core rod 6, and is inserted into the hollow metal pipe 7 with a collet. Inject lubricating oil, then put the hollow metal pipe 7 on the core rod 6, put the chuck end of the hollow metal pipe 7 into the drawing outer mold 8, and place it 30-60mm behind the drawing core 5 of the hollow metal pipe The hollow metal pipe 7 is pitted, and then ...

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Abstract

The present invention discloses a hollow metal pipe drawing core print comprising a section with fixed diameter and an outlet chamfer section equipped on one side of the section with fixed diameter; the other side of the diameter-fixed section is equipped with a deformed section tilted upwards. The hollow metal pipe drawing core print boasts of excellent lubricating performance which can reduce the friction between the drawn hollow metal pipe and the deformed section of the drawing core print and further reduce the resistance taken by the core print to ensure the size precision of the drawn metal pipe and the quality of the external surface of the drawn metal pipe; in addition, the service life of the drawing core print and the drawing processing efficiency can be increased; the present invention can be used in a wider range; the present invention can be used not only in straightening production of the hollow metal pipe but also in coiling production of the hollow metal pipe.

Description

technical field [0001] The invention relates to a drawing tool for hollow metal pipes, in particular to a drawing core head for hollow metal pipes. Background technique [0002] The drawing core head of the traditional hollow metal pipe includes a cylindrical sizing section, a conical deformation section and an outlet chamfering section arranged on both sides of it, the height of the deformation section is lower than the sizing section, and the deformation section slope down. The shortcoming of the drawing mandrel head of this hollow metal pipe is: when the drawing mandrel head of this hollow metal pipe material is stretched, the frictional force between the drawn hollow metal pipe material and the deformation section of the drawing mandrel head is large, The amount of lubricating oil consumed is large, so that the deformation section and the sizing section cannot be fully lubricated, resulting in unstable dimensional accuracy of the drawn hollow metal pipe, and poor qualit...

Claims

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Application Information

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IPC IPC(8): B21C3/16B21C1/24
Inventor 王正茂杨存利张全叶董江华郭正东
Owner GAOXIN ZHANGTONG
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