Adjustment and measurement method of ultrasonic micro-drawing die and blank holder gap for flexible punch

Abstract

The invention relates to a flexible ultrasonic punch micro deep drawing die and an edge pressing gap adjustment and measurement method. The micro deep drawing die comprises a pressing plate, a middle plate, a bottom plate, an edge pressing ring, a deep drawing female die body and micro actuators. The deep drawing female die body is arranged in a deep drawing female die body positioning groove in the middle plate. The edge pressing ring is buckled to the top surface of the deep drawing female die body through an edge pressing positioning groove. The pressing plate is arranged on the edge pressing ring and closely attached to the top surface of the edge pressing ring. A perforation stock bin is arranged in the center of the pressing plate. The multiple micro actuators penetrating through the middle plate are evenly arranged around a mold cavity of the deep drawing female die body and fixedly arranged on the bottom plate below the middle plate. Telescopic heads at the top ends of the micro actuators make contact with the edge pressing ring. The edge pressing gap between the edge pressing ring and a deep-drawn blank is adjusted through stretching and retracting of the telescopic heads. According to the flexible ultrasonic punch micro deep drawing die and the edge pressing gap adjustment and measurement method, the situation that pressure is directly applied to the periphery of the deep-drawn blank by fused plastic in the flexible punch micro deep drawing process is avoided, and thus drawing deviation of a part subjected to micro deep drawing is prevented or reduced, and the quality of the part is improved.

Description

technical field [0001] The invention relates to the technical field of micro-plastic forming and micro-mold, in particular to an ultrasonic micro-drawing die for a flexible punch and a method for adjusting and measuring a blank-holder gap. Background technique [0002] The metal sheet flexible punch ultrasonic micro-stamping forming method uses a flexible punch and a unilateral rigid die, and at the same time is assisted by ultrasound. It has unique advantages in forming small-sized metal sheet parts, especially in the formation of micro-drawn parts. However, with this method for micro-drawing, the molten plastic as a flexible punch covers the entire surface of the drawn blank, and if the force applied to each position on the peripheral surface of the blank by the molten plastic is slightly unbalanced, the blank will appear. In the case of entering the mold cavity first and the other side being crushed to death, one side wall of the drawn part is high and the other side is l...

AI Technical Summary

Problems solved by technology

However, with this method for micro-drawing, the molten plastic as a flexible punch covers the entire surface of the drawn blank, and if the force applied to each position on the peripheral surface of the blank by the molten plastic is slightly unbalanced, the blank will appear. When entering the cavity first and the other side is crushed to death, one side wall of the drawn part is higher and the other side is lower, forming a drawing deviation

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