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Cold drawing accurate steel tube wall thickness adjusting mechanism

A technology of precision steel pipe and adjustment device, applied in the direction of wire drawing die, etc., can solve the problem of the change of the wall thickness of the finished steel pipe, and achieve the effect of simple structure and convenient operation.

Inactive Publication Date: 2008-02-06
沈阳兆通精密异型管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above improvements cannot solve the problem that the wall thickness of the finished steel pipe changes due to the wear of the die when drawing precision steel pipes.

Method used

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  • Cold drawing accurate steel tube wall thickness adjusting mechanism
  • Cold drawing accurate steel tube wall thickness adjusting mechanism

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Symbols in the figure: 1. Core mold, 2. Outer mold, 3. Middle frame, 4. Outer mold baffle, 5. Pull rod, 6. Rear frame, 7. Positioning ring, 8. Spiral body, 9. Screw rod, 10. Gear, 11. Reducer, 12. AC servo motor, 13. Tie rod frame, 14. Tie rod tail, 15. Trolley car, 16. Rolling wheel.

[0012] Figure 1 shows that when the inner ring working belt of the outer mold 2 has a small cone angle of 2° to 4°, when the core mold 1 is at a different position from the central axis of the outer mold 2, the relationship between the inner ring working belt of the core mold 1 and the outer mold 2 The gap distance between them is different. When in A (position 1), there is a larger gap t1, and when in B (position 2), there is a smaller gap t2. As this relative position changes, the wall thickness of the steel pipe passing through the gap changes.

[0013] In Fig. 2 and Fig. 3, this cold-drawn precision steel pipe wall thickness adjustment device includes an outer mold 2 and a core mold...

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Abstract

The invention relates to an adjusting device for the wall thickness of cold drawn precision steel pipes, comprising an external mold and a core mold, wherein, the external mold provided with the core mold is arranged on an intermediate stand post of a drawbench. The invention is characterized in that: a working tape of the external mold is provided with a small cone angle of 2-4 DEG C; the core mold is connected with one end of a tie, the other end of which is connected with a screw; a leptospira is sleeved on the outside of the screw; the external surface of the leptospira is provided with a tooth and connected with an AC servo motor through a gear and a speed reducer. The invention can drive the tie which is connected with the core mold and a spiral breadth on the tail of the tie through the AC servo motor according to DEG C of wear of moulds; the influence of the wear of a compensation mould on the deviation of the wall thickness of the steel pipes is achieved by adjusting the relative positions of the external mold and the core mold on the axle wire, thereby the problem that the wall thickness of the steel pipes is made to be changed due to the wear of the moulds when the cold drawn precision steel pipes are used.

Description

technical field [0001] The invention relates to a cold-drawn steel pipe device, in particular to a cold-drawn precision steel pipe wall thickness adjustment device, which belongs to the processing technology of metal pipes. Background technique [0002] As we all know, the main part of the steel pipe cold drawing machine is a mold placed on the frame, which is made of hard alloy. The wall thickness of the billet is deformed to the desired size. At present, the wall thickness of cold-drawn precision steel pipes is controlled by the inner and outer cold-drawing dies with a certain size. During continuous use, the wear of the dies will lead to changes in the wall thickness of the finished steel pipes, which will eventually lead to waste products or die scrapping. Therefore, The die loss cost of cold-drawn steel pipes has always accounted for 15-20% of the entire manufacturing cost, and it is also one of the important factors for the unstable quality of steel pipes. In recent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C1/22B21C3/06
Inventor 江晓东
Owner 沈阳兆通精密异型管有限公司
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