模具制造时会不可避免的产生一些相关问题，比如说纵裂纹现象的出现，对产品还是造成了一定的影响，所以就需要我们先来找找原因然后及时做好处理工作，下面一起来看看问题的相关内容吧。

　　Mold manufacturing will inevitably produce some related problems, such as the occurrence of longitudinal crack phenomenon, or caused a certain impact on the product, so we need to find the reason and then timely processing work, let's take a look at the related content of the problem.

　　模具拉伸深度过大，鼓胀超过极限，造成纵向裂纹；此外，在精加工时，如果纵向或横向鼓包超过极限，也会造成破裂。简而言之，破裂的直接原因是这与鼓胀超限相一致；因此，超过变形极限的开裂在形式上是一种过深的拉深，如果拉深减小，成形条件会变得更好。

　　The drawing depth of the die is too large, swelling exceeds the limit, resulting in longitudinal cracks; In addition, in finishing, if the longitudinal or lateral bulge exceeds the limit, it will also cause rupture. In short, the immediate cause of the rupture is that it is consistent with a bulge overrun; Therefore, cracking beyond the deformation limit is a kind of too deep drawing in form, if the drawing is reduced, the forming conditions will become better.

　　模具的圆角半径太小，因为是胀形变形，如果超过材料的变形极限，就会产生裂纹；因此，合理的研发不仅可以防止法兰产生裂纹，而且可以补充材料。改善材料流入条件的方法之一是增加模具圆角半径；虽然增加rd可以防止出现裂纹，但此时的半径比图纸的尺寸要大。

　　The fillet radius of the mold is too small, because it is bulging deformation, if the deformation limit of the material is exceeded, it will produce cracks; Therefore, reasonable research and development can not only prevent flange cracks, but also supplement materials. One of the ways to improve the material inflow condition is to increase the radius of mold fillet. Although adding RD can prevent cracks, the radius at this time is larger than the size in the drawing.

　　山东模具制造厂家认为如果出现裂纹，法兰部分发亮，那是因为压边力过大。因此，当有破裂的危险时，可以稍微降低压边力，观察产品的变化。模具表面润滑不足。随着压边力的增加，润滑油膜的强度也应相应增加，以尽量减少摩擦。如果坯料较大，成型条件会越来越差，因此，有必要将空白减少到一个很小的限度，接近下止点时，坯料应越过拉筋，再进行试拉。

　　Shandong mold manufacturer thinks that if cracks appear and flange part shines, it is because the blank holder force is too large. Therefore, when there is a risk of rupture, the BHF can be slightly reduced to observe changes in the product. Insufficient lubrication of die surface. As the blank holder force increases, the strength of the lubricating oil film should increase accordingly to minimize friction. If the billet is larger, the forming conditions will become worse and worse, therefore, it is necessary to reduce the blank to a very small limit, close to the bottom dead center, the billet should be over the bar, and then test pull.

　　模具制造时产生的纵裂纹问题怎么出现的？以上便是问题的相关解答内容了，希望能够给您好的答案，当然如果您需要更多的内容来帮助您了解模具的制造，您可以来我们网站www.sdlqmj.com进行咨询！

　　How does the longitudinal crack problem occur when the mold is made? The above is the relevant answers to the questions, I hope to give you a good answer, of course, if you need more content to help you understand the mold manufacturing, you can come to our website www.sdlqmj.com for consultation!