A Forming Method of Micro-drawn Parts with Large Drawing Ratio
A technology of drawing ratio and micro-drawing, which is applied in the direction of forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of strict drawing gap requirements, small limit drawing ratio, high mold cost, etc., and achieve good surface quality and solve The effect of difficult lubrication and simple mold
Active Publication Date: 2016-06-08
SHENZHEN UNIV
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Problems solved by technology
[0007] For this reason, in order to solve the problems of strict drawing gap, poor lubrication, high mold cost and small limit drawing ratio in the conventional micro-drawing method that is proportionally reduced by traditional drawing technology, the present invention proposes a large drawing Forming Method of Micro-drawing Parts with Depth Ratio
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Embodiment 1
[0026] The invention is mainly used for the forming of micro-drawn parts whose maximum dimension is below 5mm. The forming material can be a thin plate such as copper, aluminum, steel, etc., and its thickness is below 0.2mm. The forming device is composed of a punch 1, an upper die 2 that doubles as a blank holder, a polymer powder 3, a spacer 5 and a lower die 6, and a punch filling cavity 21 that matches the punch is made in the upper die 2 , a concave mold cavity 61 is made in the lower mold 6, and the cushion block 5 doubles as an ejector rod and is placed at the bottom of the concave mold cavity 61, such as figure 1 and 2 shown. Because the diameter of the blank 4 is tiny, a positioning groove 62 needs to be pre-processed on the lower die 6, and its depth is about half of that of the blank 4. The junction between the positioning groove 62 and the concave mold cavity 61 is rounded. Under micro-forming conditions, if a liquid lubricant is used, it is affected by the siz...
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Abstract
The invention provides a forming method of a large-deep-drawing-ratio micro-deep-drawn part. The forming method solves the technical problems that according to a conventional micro drawing method with a traditional deep drawing technology adopted for performing scaling-down, the requirement for a deep drawing gap is strict, the lubricating effect is poor, the die cost is high, and the limit deep drawing ratio is small. The forming method is especially suitable for the technical application of micro deep drawing forming. According to the method, macromolecule powder is adopted as a deep drawing male die to perform deep drawing forming on a workpiece; because a rigid male die is not needed, no requirement for the deep drawing gap in traditional deep drawing forming exists, and the die manufacturing cost is greatly lowered. Meanwhile, the forming method has the advantages of traditional flexible die forming, the large-deep-drawing-ratio part of a complex shape can be formed by deep drawing in a one-off mode, the formed part is small in size and good in surface quality, the die is simple, and the cost is low.
Description
technical field [0001] The invention relates to the technical field of deep drawing. Specifically, it is a deep drawing technology applied to fine deep drawing parts. Background technique [0002] Micro-deep drawing has a wide range of applications in micro-electro-mechanical systems, micro-system technology, biomedical and other fields. The existing micro-deep-drawing technology mainly reduces the traditional deep-drawing technology in equal proportions based on the similarity theory, such as image 3 As shown, the blank is placed on the die, and it is compressed under the action of the blank holder force exerted by the blank holder ring. As the punch moves down, the blank is pulled into the die to form a drawn part with a certain shape. . [0003] With the impact of miniaturization, in order to process qualified micro-drawn parts, it is necessary to ensure uniform drawing gap and high mold manufacturing precision, which leads to high mold manufacturing costs, and is pron...
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IPC IPC(8): B21D22/22B21D37/01
CPCB21D22/22B21D37/01
Inventor 龚峰马将
Owner SHENZHEN UNIV