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How to avoid wrinkling in the sheet metal spinning process
Category：answer Publishing time：2025-10-22 21:10:32 Browse： Times
Sheet metal spinning is a widely used metal forming process, mainly used for manufacturing rotatable components such as cylinders, cones, and spherical surfaces. Its advantages lie in high material utilization, high processing efficiency, and good product strength. However, in the actual operation process, the workpiece is prone to the phenomenon of 'wrinkling' during the spinning process, which not only affects the appearance quality of the product but may also lead to a decrease in strength and accuracy, and in severe cases, even cause the workpiece to be scrapped. Therefore, it is of great significance to study and master the technical measures to avoid wrinkling in the sheet metal spinning process.
One, analysis of the causes of wrinkling
Wrinkling is a wavy deformation caused by the local instability of metal sheets in the spinning process under the action of compressive stress. Its main causes include:
1. Insufficient material plasticity: When the elongation and plasticity of the material are poor, local buckling is prone to occur under the action of spinning pressure.
2. Improper setting of spinning parameters: Such as excessive feed rate, low speed, or excessive spinning wheel pressure, all of which will lead to uneven metal flow and cause wrinkling.
3. Mismatch of mold or spinning wheel shape: Poor contact between the spinning wheel and the workpiece will cause metal flow to be blocked or unevenly stretched.
4. Poor lubrication: Excessive frictional force leads to difficult metal flow, thereby causing wrinkling.
5. Unreasonable blank size design: An overly large blank or improper shape design will increase the compression stress of the material during the spinning process.
Two, main measures to avoid wrinkling
1. Optimize material selection and pretreatment
Choosing materials with good plasticity and ductility (such as 08F steel, aluminum alloy, copper alloy, etc.) can effectively improve the deformation ability during the spinning process. For certain high-strength materials, the plasticity can be improved through heat treatment methods such as annealing, thereby reducing the risk of wrinkling.
2. Reasonable design of blank size
When designing the blank, the diameter and thickness of the blank should be accurately calculated according to the final size and shape of the spinning part. Avoid excessive compression stress due to an overly large blank or excessive stretching due to an overly small blank.
3. Optimize spinning parameters
Controlling reasonable spinning speed, feed rate, and spinning wheel pressure is the key to preventing wrinkling. It is usually recommended to adopt the spinning strategy of 'high speed, small feed' to make the metal flow more uniform and reduce the possibility of surface instability.
4. Improve mold and tool design
The shape of the spinning wheel must match the forming curvature of the workpiece to ensure uniform contact area. It is necessary to adopt multi-pass spinning technology to gradually form the workpiece and reduce the stress concentration in each spinning process.
5. Strengthen the lubrication conditions
The use of high-performance metalworking lubricants can effectively reduce the friction coefficient between the spinning wheel and the material during the spinning process, promote the uniform flow of metal, and reduce the possibility of wrinkling.
6. Use auxiliary support devices
For thin-walled or large-diameter parts, mandrels or supporting devices can be used during the spinning process to enhance the material's resistance to buckling and prevent wrinkles from forming due to instability.
Three, Conclusion
The wrinkling problem in the metal spinning process is a complex phenomenon affected by multiple factors, which requires comprehensive control from aspects such as material properties, process parameters, mold structure, and lubrication conditions. Through scientific design and reasonable process adjustments, the forming quality of spun parts can be significantly improved, avoiding the occurrence of wrinkling defects, thereby enhancing production efficiency and product competitiveness. With the development of CNC spinning equipment and the application of intelligent control technology, the prevention and control of wrinkling problems in the future will be more accurate and efficient.
Sheet metal spinning is a widely used metal forming process, mainly used for manufacturing rotatable components such as cylinders, cones, and spherical surfaces. Its advantages lie in high material utilization, high processing efficiency, and good product strength. However, in the actual operation process, the workpiece is prone to the phenomenon of 'wrinkling' during the spinning process, which not only affects the appearance quality of the product but may also lead to a decrease in strength and accuracy, and in severe cases, even cause the workpiece to be scrapped. Therefore, it is of great significance to study and master the technical measures to avoid wrinkling in the sheet metal spinning process.
One, analysis of the causes of wrinkling
Wrinkling is a wavy deformation caused by the local instability of metal sheets in the spinning process under the action of compressive stress. Its main causes include:
1. Insufficient material plasticity: When the elongation and plasticity of the material are poor, local buckling is prone to occur under the action of spinning pressure.
2. Improper setting of spinning parameters: Such as excessive feed rate, low speed, or excessive spinning wheel pressure, all of which will lead to uneven metal flow and cause wrinkling.
3. Mismatch of mold or spinning wheel shape: Poor contact between the spinning wheel and the workpiece will cause metal flow to be blocked or unevenly stretched.
4. Poor lubrication: Excessive frictional force leads to difficult metal flow, thereby causing wrinkling.
5. Unreasonable blank size design: An overly large blank or improper shape design will increase the compression stress of the material during the spinning process.
Two, main measures to avoid wrinkling
1. Optimize material selection and pretreatment
Choosing materials with good plasticity and ductility (such as 08F steel, aluminum alloy, copper alloy, etc.) can effectively improve the deformation ability during the spinning process. For certain high-strength materials, the plasticity can be improved through heat treatment methods such as annealing, thereby reducing the risk of wrinkling.
2. Reasonable design of blank size
When designing the blank, the diameter and thickness of the blank should be accurately calculated according to the final size and shape of the spinning part. Avoid excessive compression stress due to an overly large blank or excessive stretching due to an overly small blank.
3. Optimize spinning parameters
Controlling reasonable spinning speed, feed rate, and spinning wheel pressure is the key to preventing wrinkling. It is usually recommended to adopt the spinning strategy of 'high speed, small feed' to make the metal flow more uniform and reduce the possibility of surface instability.
4. Improve mold and tool design
The shape of the spinning wheel must match the forming curvature of the workpiece to ensure uniform contact area. It is necessary to adopt multi-pass spinning technology to gradually form the workpiece and reduce the stress concentration in each spinning process.
5. Strengthen the lubrication conditions
The use of high-performance metalworking lubricants can effectively reduce the friction coefficient between the spinning wheel and the material during the spinning process, promote the uniform flow of metal, and reduce the possibility of wrinkling.
6. Use auxiliary support devices
For thin-walled or large-diameter parts, mandrels or supporting devices can be used during the spinning process to enhance the material's resistance to buckling and prevent wrinkles from forming due to instability.
Three, Conclusion
The wrinkling problem in the metal spinning process is a complex phenomenon affected by multiple factors, which requires comprehensive control from aspects such as material properties, process parameters, mold structure, and lubrication conditions. Through scientific design and reasonable process adjustments, the forming quality of spun parts can be significantly improved, avoiding the occurrence of wrinkling defects, thereby enhancing production efficiency and product competitiveness. With the development of CNC spinning equipment and the application of intelligent control technology, the prevention and control of wrinkling problems in the future will be more accurate and efficient.
