Deep drawing method of magnesium alloy tailor welded blanks

Abstract

The invention discloses a deepening and shaping method for a Mg-alloy tailor-welded blank which includes the following technique flows: 1) preparing a blank material: a lubricant is coated on the blank material of the Mg-alloy tailor-welded blank; 2) preheating a die: the die is heated to a preset temperature and the blank material is put in the die after the temperature detected by a thermoelectric couple reaches a preset value; the blank material is heated together with the die; 3) heating the blank material: after the blank material and the die are heated together for 5 to 10 minutes, deepening and shaping is prepared; 4) deepening and shaping: the deepening and shaping speed is controlled in a preset range and deepening and shaping is carried out; 5) finishing the deepening and shaping, after the deepening and shaping is finished, a workpiece is taken out. The method realizes the uniform deformation during the deepening and shaping process of the Mg-alloy tailor-welded blank, avoids the defects of cracking or serious deviation of a welding line and improves the product quality; a deepening and shaping device for the Mg-alloy tailor-welded blank can lead the blank material to realize grads temperature field distribution; besides, the temperature control method is simple which can realize different temperature grads fields only by changing the number and distribution of heating rods.

Description

technical field [0001] The patent of the invention relates to a method for deep-drawing of magnesium alloy tailor-welded blanks, and also a method for controlling the movement of weld seams during deep-drawing of magnesium alloy tailor-welded blanks, that is, using gradient temperature field to control the drawing deformation of magnesium alloy tailor-welded blanks Uniformity. Background technique [0002] Magnesium alloy is very suitable for portable electronic and electrical communication equipment due to its low density and good electromagnetic shielding properties. Control and reduce the harm to the human body. [0003] Magnesium alloy, as a light weight, strong and tough material with good rigidity, is used in aviation, spacecraft and missiles, which can increase the payload and flight distance, and reduce the service cycle and cost. Therefore, it began to be used in aviation equipment and other fields as early as World War II. For example, magnesium alloy pipe fitti...

AI Technical Summary

Problems solved by technology

Disadvantages of die-casting method: low strength and rigidity of die-casting parts, low density (not conducive to electronic shielding effect)

However, magnesium alloys have poor plasticity at room temperature, are prone to brittle cracks, and are difficult to perform plastic forming processing; according to data, magnesium alloys are prone to brittle cracks at room temperature and are difficult to perform plastic forming processing; when magnesium alloys are formed above 200 ° C, the plasticity improves significantly.

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