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Lubricant for stamping die and magnesium alloy stamping forming process

A stamping forming and stamping die technology, applied in the field of stamping die lubricant and magnesium alloy stamping forming process, can solve the problems of affecting the surface aesthetics of stamping products, increasing the surface defects of stamping products, affecting the service life of the die, etc., and achieving low cost , The effect of improving the organizational structure and improving the service life

Active Publication Date: 2020-02-07
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the stamping process, if the friction between the material and the mold is too large, it will affect the aesthetics of the stamped product surface, increase the surface defects of the stamped product, and also affect the service life of the mold

Method used

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  • Lubricant for stamping die and magnesium alloy stamping forming process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A magnesium alloy stamping forming process, its specific steps are as follows:

[0023] (1) First, place a magnesium alloy thin strip (coil) material with a thickness of 0.05mm and a width of 400mm in a heat treatment furnace, anneal at 400°C for 2 hours, and perform heat treatment before stamping;

[0024] (2) Then, after preheating the punching die (that is, the punch and the die) at 290°C for 2 hours, apply a lubricant for the punching die on the punching die;

[0025] (3) Take out the heat-treated magnesium alloy thin strip (coil), place it between the preheated punch and die, and stamp the magnesium alloy thin strip with a stamping edge force of 6KN and a speed of 3mm / min;

[0026] (4) Finally, aging the formed magnesium alloy thin strip at 180° C. for 25 hours to obtain a stamped product.

[0027] Wherein, the lubricant for stamping die used is composed of graphene and polytetrafluoroethylene, and the content of graphene is 0.8wt.%.

[0028] figure 1 This is ...

Embodiment 2

[0045] Magnesium alloy stamping forming process in the present embodiment, its specific steps are as follows:

[0046] (1) First, place a magnesium alloy thin strip (coil) material with a thickness of 0.10mm and a width of 200mm in a heat treatment furnace, anneal at 400°C for 2 hours, and perform heat treatment before stamping;

[0047] (2) Then, after preheating the stamping die (that is, the punch and the die) at 260° C. for 2 hours, apply a lubricant for the stamping die on the stamping die;

[0048] (3) Take out the heat-treated magnesium alloy thin strip (coil), place it between the preheated punch and die, and stamp the magnesium alloy thin strip with a stamping edge force of 5KN and a speed of 6mm / min;

[0049] (4) Finally, the formed magnesium alloy thin strip is subjected to aging treatment at 160° C. for 30 hours to obtain a stamped product.

[0050] Wherein, the lubricant for stamping die used is composed of graphene and polytetrafluoroethylene, and the content ...

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Abstract

The invention relates to a lubricant for a stamping die and a magnesium alloy punching molding technology. The lubricant is mainly composed of graphene and polytetrafluoroethylene. The magnesium alloy stamping molding technology adopting the lubricant comprises the following steps: firstly, placing a magnesium alloy thin strip in a heat treatment furnace, and annealing for 0.5-2 h under a condition of the temperature of 300-400 DEG C; then, preheating the stamping die for 0.5-3 h under a condition of the temperature of 255-300 DEG C, and then coating the stamping die with the lubricant for the stamping die; taking out the magnesium alloy thin strip after heat treatment, placing the magnesium alloy thin strip between a male die and a female die after preheatment, and carrying out stamping molding on the magnesium alloy thin strip; and finally, carrying out aging treatment of the molded magnesium alloy thin strip for 20-40 h, to obtain a stamping finished product. The technology can realize stamping processing of the ultra-thin magnesium alloy strip; through the stamping technology, cracks, wrinkles and the like do not appear in the stamping process, the rate of the finished product and the stamping depth are improved, and the magnesium alloy part obtained from stamping molding has the advantages of high size precision and good surface quality.

Description

technical field [0001] The invention specifically relates to a lubricant for stamping dies and a magnesium alloy stamping forming process. Background technique [0002] Magnesium alloy is known as "the green metal structure material in the 21st century". It has the advantages of low density, high specific strength and specific stiffness, strong damping, shock absorption and noise reduction, excellent electromagnetic shielding performance and easy recycling. , aerospace, transportation and electrical and electronic fields have been widely used. [0003] Since the magnesium alloy belongs to the close-packed hexagonal structure, the plastic deformation ability at room temperature is poor. At present, the most application of the magnesium alloy as a structure is the casting, and the proportion reaches more than 90%. However, there are easy pores inside the die-casting products, and the yield rate is low. Compared with the die-casting process, stamping has higher production effi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04B21D22/02C10N40/24
CPCB21D22/02B21D22/022C10M169/04C10M2201/041C10M2213/062C10N2040/24C10N2040/244
Inventor 熊雯瑛肖宏超李轶
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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