Nickel-saving stainless steel differential temperature drawing and forming device and method

A technology of temperature difference deep drawing and stainless steel, applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve problems such as parts deformation, achieve high surface quality, easy maintenance, and save the effect of annealing process

Inactive Publication Date: 2016-10-12
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the shortcomings of scale and parts deformation caused by high-frequency annealing, the present invention provides a nickel-saving stainless steel temperature difference deep drawing forming device and method that eliminates aging cracking of nickel-saving stainless steel deep drawing parts without high-frequency annealing

Method used

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  • Nickel-saving stainless steel differential temperature drawing and forming device and method
  • Nickel-saving stainless steel differential temperature drawing and forming device and method
  • Nickel-saving stainless steel differential temperature drawing and forming device and method

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Embodiment

[0033] Figure 4 It is a cylindrical part made by the existing deep drawing process. For details, refer to the background technology.

[0034] The present invention as Figures 1 to 3 As shown, a nickel-saving stainless steel temperature difference deep drawing forming device is disclosed, comprising a punch 14, a die 5, and a blank holder 4; the die 5 is driven by an upper die holder 11 to move up and down along the axial direction of the punch 14, The blank holder 4 is driven by the blank holder mandrel 4 to move up and down along the axial direction of the punch 14,

[0035] This section of nickel-type stainless steel temperature difference deep drawing forming device also includes a heating device for heating the die 5 and the blank holder 4; the inside of the punch 14 is a cavity, in which there is a Cooling air-cooled unit.

[0036] In order to make the sheet material flow more smoothly and prevent wrinkling during the drawing process, a drawing threshold is added at ...

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PUM

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Abstract

The invention discloses a nickel-saving stainless steel differential temperature drawing and forming device and method. The device comprises a heating device used for heating a female die and an edge pressing ring, a cavity is formed in a male die, and an air cooling device used for cooling a male die body is arranged in the cavity. By heating the female die and the edge pressing ring, the temperature of the female die and the edge pressing ring is kept between 100 DEG C and 150 DEG C, stability of a nickel-saving stainless steel flange deformation area is improved, martensitic transformation is not generated in the plastic deformation process, and the material ageing cracking defect is overcome. Meanwhile, the male die is cooled, the temperature of the male die is kept below 40 DEG C, tensile strength of a dangerous section of a drawing part is improved, and primary deformation capacity of materials is improved. The device and method reduce ageing cracking sensitivity of nickel-saving stainless steel, the conventional annealing procedure for preventing cracking of the drawing part is omitted, the primary drawing deformation limit of materials is improved, and forming passes are reduced.

Description

technical field [0001] The invention relates to a plastic forming device and a forming process of metal materials, in particular to a nickel-saving stainless steel temperature difference deep drawing forming device and method. Background technique [0002] Nickel-saving austenitic stainless steel is based on the traditional 304 stainless steel, reducing the use of precious metal Ni, adding Mn, N and other elements to obtain a single austenitic stainless steel at room temperature. In recent years, due to its excellent mechanical properties and good corrosion resistance, this type of stainless steel has attracted more and more attention from stainless steel manufacturers, and the number of varieties developed and product output are showing a trend of rapid growth year by year. [0003] During deep drawing, the failure mode of most materials is that the stress at the bottom of the straight wall of the part exceeds the tensile strength and ruptures. However, after deep drawing o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/22B21D37/16B21D37/10
CPCB21D22/22B21D37/10B21D37/16
Inventor 夏琴香方铭张豪梁卫民程秀全叶灿深周驰
Owner SOUTH CHINA UNIV OF TECH
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