马口铁三片罐的罐口部位在缩颈成形过程中时常出现起皱现象,影响罐子的密封效果。对制罐用板材力学性能的分析结果表明,板材的同向力学性能差异对缩颈起皱具有明显的影响。缩颈过程中,由于材料同向的屈服强度和延伸率差异明显,材料进入塑性变形的时间和产生的塑性变形量不同,使得罐口部位的环向收缩变形不均,进而导致塑性较差的部位变形困难而产生褶皱。 The tin mouth of the three-piece tin can wrinkles frequently during the neck forming process, which affects the sealing effect of the tin. The analysis of the mechanical properties of the sheet made of canned steel shows that the difference in the same-direction mechanical properties of the sheet has a significant effect on the shrinkage and wrinkling. In the necking process, due to the obvious difference of yield strength and elongation in the same direction with the material, the plastic deformation time and the amount of plastic deformation caused by the material are different, so that the circumferential shrinkage of the mouth of the canister is deformed unevenly, which leads to poor plasticity Parts of the deformation and the resulting wrinkles.