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Process design of sheet metal bending structure

Mar 26,21

With the continuous development of metal processing industry, today's metal processing technology is varied.Sheet metal technology as one of the less popular, in its product equipment plays an important role at the same time, the processing technology itself is not known by people.And sheet metal bending structure is widely used in sheet metal processing technology, the practical part, such as car roof arc plate, curvy kettle, awnings, these products are used for sheet metal bending structure processing design for manufacturability, but sheet metal bending process is also the hardest part of the sheet metal processing, we need to have a comprehensive understanding, the process can be better to use it in the future.
Definition and machining of bending parts

What are bending parts
In our production and life, many products and equipment are not a single linear strip design, so it is necessary to have a certain radian structure to connect.Bending technology was originally used in plate processing, is a basic form of plate processing.The bending parts are the parts in the plate bending structure process. Every basic processing part, regardless of the difference in body shape and shape, is collectively referred to as the bending parts.
Process holes, process slots and notches
There are many factors that affect the process design of bending structure of sheet metal, but there are three factors that affect the production of the workpiece most: process hole, process groove and notch.The improper design of any one of these three items may lead to the deformation of the material within the bending range, or produce the phenomenon of cracks, and the material becomes longer and wider.From the process hole, its design should be combined with the practical application, must ensure the workpiece's adaptability and firmness.But from the modern aesthetic point of view, the processing of the craft hole should pay attention to the overall coordination and aesthetic properties of the workpiece.Generally speaking, there is a data template for the machining of the process hole.In the plate thickness of 1.2 mm below the general can ignore the process hole, the plate thickness of 1.5 mm of the process hole diameter is 3.2 mm, the plate thickness of 2 and 2.5 mm of the process hole diameter is 3.5 mm, the plate thickness of 3 mm of the general process hole diameter is 4.8 mm.From the process groove, the bending rate of the embedded bending edge should be determined generally according to the relevant formulas, and the aesthetic quality of the process groove should be guaranteed, so as not to bring uncomfortable feeling to people.Sheet metal bending structure of the gap design has its unique design methods and requirements, when the sheet metal material bending edge is embedded bending edge, the bending length of the gap must be greater than or equal to the thickness of the plate and the bending radius plus half of the width of the process groove or gap, the hole edge line to the center of the bending radius distance, can not exceed ten millimeters.This kind of design method almost formed a formula in the process, which is summarized through people's continuous practice and research.
Research on process algorithm of sheet metal bending structure
For sheet metal bending structure processing technology, many of its components have the corresponding algorithm to carry out the design and requirements of the proportion, as the above mentioned process hole, process slot and gap.In addition, sheet metal bending structure process also has many aspects of the relevant algorithm requirements.The most important process of sheet metal bending structure is to process the bending edge of sheet metal material, and in general, the bending edge of sheet metal material usually has the first bending edge, the second bending edge, and the third bending edge.Different bending structure of sheet metal bending processing have different algorithms to set the requirements, and the bending and notch has a very close relationship.Based on the first bend, the bending rate of the next one or more bends is related to and affected by it.The minimum height of the first bending edge is generally greater than or equal to the ratio of the width of the notch and two times the bending Angle. If the proportion is not appropriate, it will cause the deformation of the bending edge or the insufficient curvature of the bending edge, which directly affects the processing of the workpiece and causes the failure of the processing.When the first edge is processed strictly in proportion, the height of the second edge should be higher than that of the first edge, the cutting edge size of the second edge should be larger than that of the first edge, and the Angle of the two edges should not be greater than 45 degrees, while the height of the third edge should be higher than that of the second edge.Therefore, the processing of bends is a complex work, the more the number of bends, the higher the requirements for the operation, once there is a bends do not meet the proportion set, then the integrity of the workpiece will be destroyed.The bending radius of the bending also has the corresponding data requirements, the smaller the bending radius, the greater the tension of the workpiece, if the proportion of the bending radius is not correct, the processed parts can not have a good stability.Generally speaking, sheet metal material thickness is 0.4 mm, its minimum bending radius is 8 to 10 mm;Sheet metal thickness of 0.5 mm, the minimum bending radius of 15 to 20 mm;For sheet metal thickness of 0.6 mm, the minimum bending radius is 25 to 30 mm;Sheet metal thickness of 1 mm, the minimum bending radius of 45 to 50 mm;For sheet metal with a thickness of 1.5 mm, the minimum bending radius is 55 to 60 mm.For the bent part, if there is a hole near the bending line, the design requirements need to ensure that the hole is outside the bending deformation area, to prevent the deformation of the hole in the bending process.The distance from the hole edge line to the center of the bending radius has the following requirements, when the hole is round, if the sheet metal material thickness
Less than 2 mm, then the distance from the center of the circular hole to the bending radius should be greater than its sheet metal thickness;If the thickness of sheet metal material is greater than 2 mm, the distance between the hole and the center of the bending radius should be greater than twice the thickness of the sheet metal material.When the hole is square, the length of each side of the hole should be greater than 2.5 to 3 times the thickness of the sheet, according to the relevant measurement data, to ensure that the hole will not be deformed.In order to make the parts of sheet metal bending process Angle beautiful, Angle Angle process design also has the relevant data requirements.Such as sheet metal material thickness of 1 to 1.2 mm, generally do not need to process port to decorate;And sheet metal thickness of 1.5 mm, the general Angle Angle process diameter is 3.2 mm;Sheet metal thickness of 2 to 2.5 mm, the general Angle Angle of the process diameter of 3.5 mm;Sheet metal thickness of 3 mm, Angle Angle of the diameter of the opening is 4.8 mm.
conclusion
Sheet metal bending structure processing technology is a difficult point in sheet metal processing technology, its processing has a lot of data requirements, and the requirements of equipment is also very high.But the curved workpiece obtained by the bending structure processing of sheet metal is widely used in our daily life and has a great market demand.Therefore, we should improve the attention to the bending processing technology of sheet metal, increase the technology of its product design, and constantly update the mold. At the same time, we should reduce the cost and ensure the quality of the workpiece.To continue to explore this technology, the introduction of advanced concepts, in order to sheet metal processing technology in China can get better development and efforts.

 
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