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A kind of deep-tube deep-drawing die and high-speed deep-drawing process

A technology for deep drawing dies and deep tube parts, which is applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of quality defects of finished deep tube parts, reduce the possibility of quality defects, smooth metal flow, and Consistent tissue and wall thickness effects

Active Publication Date: 2021-08-17
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that in the existing deep-drawing process when drawing deep cylindrical parts, a higher deep-drawing speed is likely to cause quality defects in finished deep cylindrical parts, the present invention provides a high-speed deep-drawing process for deep cylindrical parts. Reasonable deep drawing process parameters can be drawn at a higher deep drawing speed while ensuring that the finished deep tube parts do not produce large quality defects, effectively improving the production efficiency of deep tube parts

Method used

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  • A kind of deep-tube deep-drawing die and high-speed deep-drawing process
  • A kind of deep-tube deep-drawing die and high-speed deep-drawing process

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Embodiment 1

[0032] In the field of deep drawing of cylindrical parts, cylindrical parts with a small ratio of diameter to height (not more than 1 / 2) are generally called deep cylindrical parts. In the production of cylindrical parts, the way to speed up the production efficiency of cylindrical parts is usually to increase the deep drawing speed during deep drawing. Compared with some existing methods such as pre-processing materials, the operation is simpler and more effective. However, when drawing thin-walled deep tube parts (with a wall thickness less than 1mm), due to the fast metal flow and severe deformation of the thin-walled part, the use of a high drawing speed can easily lead to wire drawing, Quality defects such as deformation and cracking will affect the use effect, so we need to take some corresponding measures for this problem.

[0033] Such as figure 1 and figure 2 As shown, a deep cylindrical part drawing die is used to reduce the possibility of quality defects in the f...

Embodiment 2

[0035] A high-speed deep-drawing process for deep tube parts, using a deep tube part deep-drawing die in Example 1 for deep-drawing, and the specific size of the deep-tube part for each step needs to be based on the size of the blank and the set size of the finished deep tube part To allocate, it mainly includes the following steps:

[0036] 1. Preliminary forming: prepare the blank, the blank generally chooses a circular blank with a certain thickness, and draws the blank at a deep drawing speed of 220mm / s~300mm / s to form a hollow cylinder with an upper end opening. This stage can be divided into one or more steps according to the size of the blank and the set finished deep tube during actual drawing. Thickness and thinning are not obvious. In order to prevent the deformation of one-time deep drawing from being too severe, it is generally divided into 2 to 4 steps. At this stage, due to the smaller wall thickness reduction and lower drawing height, while adopting a higher dr...

Embodiment 3

[0069] 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 size of the set finished cylindrical part and the die gap is adjusted, and then the relevant drawing is performed. Under the conditions of the parameters (blankholder force, friction coefficient, deep drawing speed), the circular blank with a diameter of 82mm and a thickness of 0.5mm is thinned to a deep cylinder with a thickness of 0.4mm. Wherein, step 1 uses a conventional deep drawing die for deep drawing.

[0070] 1. Preliminary formation

[0071]Deep drawing step 1: After placing the blank on the lower die, press the blank with the blank holder ring. The blank holder force can be 5000N-20000N, and this embodiment is 8000N. Next, add lubricating fluid at a temperature of 15°C to control the coefficient of friction between the blank and the mold, and finally control the upper die to press down...

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Abstract

The invention discloses a deep cylindrical part drawing die and a high-speed drawing process, belonging to the field of plastic material processing. The mold includes a punch and a die that cooperate with each other. The punch includes a cylindrical boss. The die has a drawing groove with an upper end open. Diameter section and cylinder section, the diameter of the sizing section is basically equal to the diameter of the workpiece after each step of drawing and thinning; the diameter of the cylinder section is 0.5 mm to 2 mm larger than the diameter of the sizing section. By setting reasonable deep-drawing process parameters and coordinating with the above-mentioned molds, this process can draw at a higher deep-drawing speed while ensuring that the finished deep-tube parts do not produce large quality defects, effectively improving the quality of the deep-tube parts. production efficiency.

Description

technical field [0001] The invention belongs to the technical field of plastic material processing, and more specifically relates to a deep tube drawing die and a high-speed drawing process. 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. In the deep drawing process of deep cylindrical parts, the drawing efficiency is usually improved by increasing the deep drawing speed. However, in the forming process of thin-walled deep cylindrical parts, due to the large drawing height and thin wall thickness, the deformation of the thin wall Vigorous and affected by residual stress, defects such as wire drawing, scratches, cracks and even breaks often occur during high-speed d...

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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