How to Control the Wrinkling and Cracking Problems in the Stamping Process of No. 45 Seamless Pipe

With the rise of many industries, the demand for No. 45 seamless pipe is also increasing, so the quality requirements for No. 45 seamless pipe are also more stringent, but the No. 45 seamless pipe is easy to be used in the stamping process. How do you control the wrinkling and cracking problems?
1, Wrinkles and stacking
Wrinkling is one of the most important and difficult problems that plague the production of No. 45 seamless pipe products. Wrinkle defects will cause many adverse effects, and in severe cases, a stack will be formed. Wrinkling can have a serious effect on the appearance of the part, especially after painting. Severe wrinkling can make the part unrepairable, causing the part to be scrapped.
Reason: The material flow is unbalanced during sheet metal stamping, and it is squeezed and cannot be absorbed and eliminated.
Solution: The manufacturer balances the flow rate of the sheet.
Solution: (1) Increase the drawbead by welding, increase the flow resistance of the sheet; (2) Do the strong pressure treatment on the wrinkle part, reduce the gap of the profile; (3) Change the shape of the drawbead, such as changing the round tendon to square Reinforcement, or change the size of the drawbead; (4) Increase the size of the blanking member and increase the role of the crimping ring.
Temporary measures for production: (1) Increase the presser force of the press; (2) Pad the tape at the relevant place; (3) Adjust the balance block, reduce the partial balance block gasket, and increase the resistance of the No. 45 seamless pipe to the local plate material.

2, Cracking and injury line (constriction)
Cracking usually occurs during the debugging of new molds or sheets. Cracking directly leads to the scrapping of parts. The injury line is the ultimate performance of cracking of the parts. After the baking is applied, the stress of the material is released, and the parts may still be cracked. Therefore, In the stamping production process, the flaws of the finished parts must be eliminated.
Reason: Due to the smooth flow of the sheet material, the tensile deformation of the sheet material during the stamping process exceeds the elongation requirement of the material itself, resulting in cracking of the stamping part.
Solution: Improve the flow rate of the sheet.
Solution: (1) Reduce the drawbead by welding, reduce the material drag resistance; (2) Improve the profile finish; (3) Increase the piercing knife and increase the local sheet flow supply; (4) Change the shape of the drawbead; (5) Reduce the sheet edge size.
Temporary measures for production: (1) Apply lubricant to the cracked or injured line of No. 45 steel pipe; (2) Reduce the blanking force properly; (3) Adjust the balance weight, increase the partial balance block gasket, and reduce the flow resistance of the local sheet.

Therefore, the above is the solution for the wrinkling and cracking problems that occur in the stamping process of No. 45 seamless pipe by our manufacturer. Therefore, in the subsequent production process, we must pay more attention to the operation details of the No. 45 seamless pipe.

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