Expanding apparatus for hydraulic pressure cold drawing machine

A cold drawing machine and hydraulic technology, applied in the direction of the mandrel, etc., can solve the problems of inability to expand the diameter, difficulty in making large-diameter seamless precision pipes, etc., and achieve the effect of large diameter expansion

Active Publication Date: 2008-08-06
江苏龙城洪力液压设备有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages that the existing cold drawing machine can only reduce the diameter and wall, but cannot expand the diameter, and it is difficult to make large-diameter seamless precision pipes, the present invention provides a diameter expanding device for a hydraulic cold drawing machine. The diameter expanding device can expand the diameter of the tube blank to produce seamless precision pipes with large diameter and long length.

Method used

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  • Expanding apparatus for hydraulic pressure cold drawing machine

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Embodiment Construction

[0010] The expanding device of the hydraulic cold drawing machine of the present invention as shown in Fig. 1, Fig. 2 has a pipe holding mechanism, an inner mold 6 and a core rod 7, and the pipe holding mechanism is fixed on the bed of the cold drawing machine, and the pipe holding mechanism has One bracket 1, two bases 2, two tube holding cylinders 3, four slide plates 4 and two tube holding rollers 5, the base 2, tube holding cylinders 3, slide plates 4 and tube holding rollers 5 are respectively arranged on On both sides of the tube blank, the base 2 is respectively fixed on both ends of the bracket 1, the tube holding cylinder 3 is fixed on the base 2, the tube holding cylinder 3 has a push rod 31, the slide plate 4 is fixed on the front end of the push rod 31, and the tube holding roller 5 is concave drum shape, the diameter of the concave surface is consistent with the diameter of the expanded pipe, the tube holding roller 5 is connected to the slide 4 in rotation, the sl...

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Abstract

The invention discloses a radius expanding device of hydraulic cold drawing machine, which comprises the following parts: pipe-hugging mechanism, inner mold and core rod, wherein the pipe-hugging mechanism contains rack, chassis, pipe-hugging cylinder, sliding board and pipe-hugging roller, the chassis is fixed on two rack ends of rack, the pipe-hugging cylinder is fixed on the chassis, which possesses pushing rod, the sliding board is fixed on the front end of push rod, the roller of pipe-hugging pipe displays indent waist drum shape with indent diameter in consistent with expanded pipe material, the roller of pipe-hugging connects sliding board, which connects chassis, the core rod is pierced in the pipe mould, the inner mold is loaded in the core rod, which fixes the clamp car.

Description

technical field [0001] The invention relates to the technical field of hydraulic cold drawing machines, in particular to a diameter expanding device of a hydraulic cold drawing machine. Background technique [0002] When the cold drawing machine draws the seamless pipe, the front end of the tube blank passes through the mold and is inserted into the jaws of the cold drawing machine for clamping. Then the cold drawing machine pulls the tube blank through the die hole to reduce the diameter and wall of the tube blank. , and finally reach the finished product size. This cold drawing machine can only reduce the diameter and wall of the tube blank, but cannot expand the tube blank. And existing some diameter expanders, its diameter enlargement amount is all less, what have is only used for eliminating the forming pressure of steel pipe and welding stress, discloses a kind of " diameter expander " as Chinese patent CN2394734Y, and its main function is The diameter of the steel p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C3/16B21C1/24B21D39/20
Inventor 刘洪刘中正谢建春吴文波
Owner 江苏龙城洪力液压设备有限公司
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