The common deformation methods of Grade 3 Pure Titanium Plate can be summarized into five types: deep drawing, pulsation, flanging, bending and compound forming. However, it is difficult to make a typical test piece if a single drawing deformation method is used. Therefore, the compound deformation method is actually used in the test. In addition, the test will inevitably bring about the influence of mold structure and operating process factors, so the evaluation of sheet drawability is a lot of complicated knowledge. Guozhu’s research work mainly takes the limit drawing coefficient K (LDR) as an indicator, and proposes many evaluation methods from a variety of perspectives such as analysis, testing, and statistics, and solves many problems. However, most commonly used steel and aluminum are the main objects, so they must be modified and supplemented for use in Titanium Clad Copper Sheet and titanium alloys.
The drawing test method of cylindrical parts was proposed by Swift in 1940. It used the stepwise increase of wool to measure the limit drawing coefficient K value, and it was recommended as an international standard by the International Deep Drawing Research Association in 1967. This method has learned a lot The drawing performance of steel, aluminum and copper sheets.
When used in titanium, especially α and α+β titanium alloys, the following problems are mainly encountered:
a. Bending and cracking occurs at the four corners of the punch;
b. Wrinkles and cracks are generated at the round corners of the die.
This is caused by the poor bending and wrinkle resistance of the titanium alloy, and cannot fully explain its deep drawability. For example, TC4 and TA7 boards have poor deep drawing or impossible to draw.
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