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Method for determining blanks for plate forming members

A blank and sheet metal technology, applied in the field of determining the blank of sheet metal forming parts, can solve the problems of long design cycle, low accuracy, complex mathematical operations, etc., and achieve the effects of improving quality, reducing waste, and reducing costs

Inactive Publication Date: 2004-11-17
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] In order to overcome the deficiencies of the existing method for determining the edge shape of the blank of the flat sheet formed part, such as complex mathematical operations, low accuracy, and long design cycle, the present invention provides a method for determining the shape of the blank by physical simulation—— physical reverse method

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  • Method for determining blanks for plate forming members
  • Method for determining blanks for plate forming members
  • Method for determining blanks for plate forming members

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Embodiment Construction

[0018] refer to Figure 1~6 . Roughly estimate the shape of the blank according to the actual parts, and make the high molecular polymer blank according to this shape. The blank estimation method is as follows: lay the part flat and draw its orthographic projection, and according to the estimation of the surface area of ​​the part, enlarge and smoothen the projection to obtain a closed curve, and make a polymer according to the estimated shape of the blank. blank. Estimated blank shape see figure 1 .

[0019] Preheat the mold, then put the high molecular polymer blank into the mold, pay attention to the placement position should be reasonable and mark accordingly, continue heating, when heated to 85 ℃, keep warm for 20 minutes, and then continue heating, so that the mold and blank After reaching the freezing temperature of the high molecular polymer at 120-150°C, keep warm for 80 minutes, and slowly form. After forming, keep the position of the mold still, cool the mold an...

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Abstract

The invention discloses a method for determining board material forming blank, the character lies in: forecasting the shape of blank according to the superficial area of real parts, getting a closed curve, and producing high molecular polymer blank according to the shape, the high molecular polymer blank is put into mould to be heated and formed, the die and formed part are cooled to room temperature, then takes out the formed part, then carries on trimming process to the formed part, then carries on high temperature quenching and developing to the formed part, restores it into board material, the edge shape can be used as the baiting of blank template. The invention reduces the trimming quantity of formed part, reduces the waste of material, and decreases the cost of the product; the invention improves the quality of product.

Description

technical field [0001] The invention relates to a method for determining the blank of a sheet metal forming part, especially a method for determining the edge shape of a blank of a flat sheet forming part used in production. Background technique [0002] At present, there are many known methods for determining the edge shape of the blank of the flat sheet forming part used in the production, including the empirical method, the geometric mapping method, the slip line method, the incremental finite element method, and the finite element inverse method. These methods are proposed for a certain type of sheet metal parts on the basis of certain assumptions, and each has its own advantages and disadvantages. Among them, the empirical method is simple and easy to implement, but it is only suitable for the determination of rectangular blanks and circular blanks, and the accuracy is not high; the slip line method is a relatively intuitive and reasonable method. However, due to the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/14B29C43/42
Inventor 韩志仁陶华朱丽
Owner NORTHWESTERN POLYTECHNICAL UNIV