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Hydraulic cold drawing machine die

A cold drawing machine and hydraulic technology, applied in the direction of wire drawing dies, etc., can solve the problems of complex adjustment of inner dies and difficulty in ensuring ellipticity, and achieve the effects of reducing costs, simplifying die adjustment procedures, and improving production efficiency and product quality

Inactive Publication Date: 2012-02-22
WUXI DAJIN HIGH PRECISION COLD DRAWN STEEL TUBE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a hydraulic cold drawing machine mold, which solves the problems that the ellipticity is not easy to guarantee when cold drawing steel pipes, and the internal mold adjustment is complicated before production or before changing specifications.

Method used

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  • Hydraulic cold drawing machine die
  • Hydraulic cold drawing machine die

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Embodiment Construction

[0012] Such as figure 1 As shown, a specific embodiment of the present invention is provided. In the figure, a hydraulic cold drawing machine mold includes an inner mold 1, an outer mold 2, an outer mold cover 3, a backing plate 4, a pressure ring 5 and an outer mold pressing Cover 6, the size of the sizing belt of the inner mold 1 and the outer mold 2 is 20mm to 30mm shorter than the commonly used standard. In order to ensure the tight installation of the inner mold 1 and the outer mold 2, a backing plate 4 is added under the pressure ring 5 , its thickness is equivalent to the shortened size of the sizing belt, and the outer mold gland 6 is fastened and installed outside the pressure ring 5 .

[0013] In terms of material selection, the present invention adopts high-carbon and high-chromium cold work die steel Cr12MoV with high hardenability to replace the original high-carbon chromium bearing steel GCr15, so that the mold has higher hardness, good wear resistance and Highe...

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Abstract

The invention relates to a hydraulic cold drawing machine die, comprising an external mould sleeve, an external mould press cover, an external mould, and an internal mould. Sizes of calibrating straps of the internal and external moulds are shorter than the commonly used standard by 20-30mm, and the calibrating straps of the internal and external moulds are flush. The die also includes a backing plate, the size of which is equivalent to the shortened size of the calibrating straps, and the backing plate is installed cooperatively with the external mould press cover inside the external mould sleeve. By shortening the sizes of calibrating straps of the internal and external moulds, the die provided in the invention saves the die materials, and solves the problems of difficult ovality ensuring during steel pipe cold drawing and complex internal mould adjustment before production or specification change, simplifies the die adjustment process, lowers the cost effectively, and improves the production efficiency as well as product quality.

Description

technical field [0001] The invention relates to a hydraulic cold drawing machine component, in particular to a hydraulic cold drawing machine mold. Background technique [0002] The inner and outer molds of the split mold of the hydraulic cold drawing machine belong to the cold working mold steel. At room temperature, the steel pipe is plastically deformed through the drawing of the oil cylinder, elongated, expanded, or reduced. Generally, cold work die steel should have sufficient strength, including tensile, compressive, and bending strengths, as well as good wear resistance, toughness, and hardness, and have good machinability and non-deformability after quenching. The split mold used for large seamless steel pipe hydraulic cold drawing machine usually puts the mold core into it by heating the mold sleeve, and then the mold is installed on the mold seat of the cold drawing machine for cold drawing operation. If there are impurities on the blank tube Or due to long-term s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C3/02
Inventor 徐彬
Owner WUXI DAJIN HIGH PRECISION COLD DRAWN STEEL TUBE
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