How to design reasonable sheet metal parts?

How to design reasonable sheet metal parts?

Content Catalog

Sheet metal parts, in fact, are commonly referred to as metal sheet parts. Sheet metal refers to a metal plate whose thickness is much smaller than its length. Due to its special geometric shape and small thickness, it has the advantages of small processing amount, light weight, easy cutting, and standardized shape. However, since most people are not familiar with the material of sheet metal, the design of many sheet metal parts is unreasonable, so that the quality of the final finished sheet metal part is low, so how to design a reasonable sheet metal part? Let us take you to understand!

Sheet metal process characteristics and importance

First of all, you need to know that metal sheet parts are divided into three types of processing processes: blanking, forming, and connecting. According to the above three processing techniques, the sheet metal process can be divided into stamping process, bending process and welding process, all of which have their own characteristics. The traditional machining process uses tool processing, while the stamping and bending processes use stamping dies and bending dies respectively, and the welding process uses welding equipment and positioning tooling for welding processing.

The processing method is different, and the processing technology is also completely different. For designers who have been engaged in traditional mechanical processing of structural parts for a long time, change the structural design thinking, consider the influence of the limitations of sheet metal processing equipment and processing molds on the design of sheet metal parts, and combine the sheet metal process for structural design of sheet metal parts Particularly important.

Misunderstandings and Optimization of Structural Design of Sheet Metal Parts

The structural design of sheet metal parts should mainly consider the requirements and characteristics of sheet metal processing technology. In addition, attention should also be paid to the batch size, processing cost and production efficiency of sheet metal parts processing. Because designers have been engaged in the design of mechanical processing structures for a long time, there are often some misunderstandings in the structural design of sheet metal parts.

Strength Design of Sheet Metal Parts

Since designers cannot get rid of the design idea of machining structural parts, in order to improve the design strength of sheet metal parts, the thickness of the sheet metal material is blindly increased, and the design strength cannot be improved from the stamping process and bending process of sheet metal parts. . When designing a sheet metal product, materials with the same thickness should be selected as much as possible, which can play a positive role in the process of production material preparation, processing, welding and so on.

The strength can be significantly improved by stamping convex hulls and rolling ribs. In the structural design of sheet metal parts, the force analysis of the structural parts can be carried out. Calculate the stress concentration point and dangerous section of the part, focus on designing convex hull reinforcement at the stress point, and design rib reinforcement at the dangerous section.

Through the strong flattening of the bending flattening die, the local thickness of the sheet metal part can be doubled, but the strength is much higher than that of directly using double-thickness materials.

Bend edge design

The bending shortest side of the sheet metal is affected by the width of the V-shaped opening of the lower die and the bending R angle, so the design should take into account the limitation of the shortest bending side. Assuming that the width of the V-shaped opening of the bending mold is 12mm, and the bending R angle is 0.5mm, the minimum short side of the bending cannot exceed VI2+R+0.5=7mm. Designers should design according to the specifications of the existing bending dies in the factory, so as to avoid customizing many unnecessary molds in the factory, which will greatly increase the processing and management costs of the molds.

Optimized design

For sheet metal parts processed by welding, welding and grinding are very troublesome, the processing efficiency is relatively low, and the appearance quality cannot be guaranteed. Therefore, the welding surface can be reduced by optimizing the design, making the part more beautiful and improving the surface quality without reducing the design strength.

Another example is the guide pin bracket commonly used in a certain cabinet, which is conventionally cut and processed from a whole piece of aluminum plate; after the optimized design, it can be directly formed by bending the sheet metal parts, which can also meet the needs of the product and reduce the amount of processing.

Hope the above content is helpful to you!

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