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A High Thinning Ratio Deep Drawing Process for Deep Tube Parts

A technology of thinning rate and deep cylinder, applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve problems such as pulling cracks, breaking, deformation, etc., to reduce wire drawing, uniform wall thickness, and reduce deep drawing steps. Effect

Active Publication Date: 2021-04-02
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problem that the existing thin-walled deep cylindrical parts with large thinning rate are prone to deformation, even cracking and breaking during deep drawing, the present invention provides a high-thinning deep drawing process for deep cylindrical parts, through unique drawing The cooperation of the deep process and the deep drawing die can efficiently draw the predetermined thin-walled deep tube parts, and ensure that deformation and cracking are not easy to occur during deep drawing

Method used

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  • A High Thinning Ratio Deep Drawing Process for Deep Tube Parts
  • A High Thinning Ratio Deep Drawing Process for Deep Tube Parts
  • A High Thinning Ratio Deep Drawing Process for Deep Tube Parts

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The drawing process of this embodiment is divided into 7 steps. Before drawing, the drawing depth of each pass is allocated according to the size of the original blank and the size of the set finished deep tube and the die gap is adjusted, and then the relevant drawing is performed. Under the conditions of parameters (blankholder force, friction coefficient, deep drawing speed), the circular blank with a diameter of 75mm and a thickness of 0.5mm is thinned to a cylindrical piece with a thickness of 0.25mm.

[0059] 1. Preliminary formation

[0060] Deep drawing step 1: After placing the blank on the die, press the blank with a blank holder. The blank holder force can be 5000N-20000N, and this embodiment is 8000N. Next, lubricating fluid is added to control the coefficient of friction between the blank and the mold, and finally the punch is controlled to press down to draw the blank.

[0061] In this step, the friction coefficient between the blank and the punch is 0.1,...

Embodiment 2

[0091] The drawing process of this embodiment is divided into 6 steps. Before drawing, the drawing depth of each pass is allocated according to the size of the original blank and the set size of the finished deep tube, and the die gap is adjusted, and then the relevant drawing is performed. Under the conditions of parameters (blankholder force, friction coefficient, deep drawing speed), the circular blank with a diameter of 62mm and a thickness of 0.4mm is thinned to a deep tube with a diameter of 21mm and a thickness of 0.2mm.

[0092] 1. Preliminary formation

[0093] Deep drawing step 1: After placing the blank on the die, press the blank with a blank holder. The blank holder force can be 5000N-20000N, and 6500N is used in this embodiment. Next, lubricating fluid is added to control the coefficient of friction between the blank and the mold, and finally the punch is controlled to press down to draw the blank.

[0094] In this step, the coefficient of friction between the b...

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Abstract

The invention discloses a deep cylinder piece high-thinning-rate deep drawing technology, and belongs to the technical field of plastic material processing. The deep cylinder piece high-thinning-ratedeep drawing technology comprises the three steps of preliminary forming, pre-thinning and stepped forming. During pre-thinning and stepped forming, a high-thinning-rate deep drawing die is adopted for deep drawing, the possibility of quality defects of workpieces can be reduced, and during stepped forming in the last stage, the segmented deep drawing thinning manner is adopted for the workpiecesin the technology, the quality defects caused by the excessive deep drawing depth are effectively overcome, and accordingly a thin-wall deep cylinder piece with the high thinning rate can be obtainedthrough deep drawing.

Description

technical field [0001] The invention belongs to the technical field of plastic material processing, and more specifically relates to a deep-drawing process for a deep cylinder. Background technique [0002] With the development trend of light and thin existing workpieces, the requirements for the wall thickness of various workpieces in the market are also getting higher and higher. In the field of deep drawing of cylindrical parts, cylindrical parts with a small ratio of diameter to height are generally called deep cylindrical parts. Due to the high drawing height of deep cylindrical parts, one-time deformation is prone to wire drawing, deformation, cracking, etc. Quality defects, so multi-step deep drawing is usually used for deep tube parts. [0003] The existing deep-drawing methods of deep tubes mainly include equal-wall deep-drawing and thinning deep-drawing. The equal-wall deep-drawing process generally has the disadvantages of more drawing processes, multi-step annea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/28B21D37/08
CPCB21D22/28B21D22/286B21D37/08
Inventor 宋孟李妍妍白凤梅黄贞益刘相华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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