The relationship between the notch width of the lower die of the CNC bending machine mold and the plate thickness is a question that many metal processing manufacturers will ask. Now the recognized calculation formula in the market is: V groove width = plate thickness *8. This is a common calculation formula in the market, but it also hides a disadvantage. For workpieces that require precision, is this formula still applicable? The result is that it does not completely match. Because this formula is only suitable for precision bending, not for suspended bending and close bending. At the same time, the ratio of the width of the lower die groove of the bending machine to the plate thickness required by different materials is not necessarily the same.

According to the data summarized according to market requirements, the plate thickness t: o~3mm plate, the notch width of the lower die of the bending machine V=plate thickness t*6, precision bending can be narrowed to 4 times the plate thickness: 3~10mm plate , the notch width of the lower die of the bending machine V=plate thickness t*8; for plates above 10mm, the notch width of the lower die V=plate thickness*12. The above are common calculation methods in the market. According to the experience of CNC bending machine mold manufacturers for many years and the processing experience of Lingjin Factory, this formula is usually suitable for precision bending. For suspended bending and tight bending, the relationship between the width of the corresponding lower die slot and the multiple of the plate thickness can be appropriately reduced. If the processing plate is aluminum, the width of the slot of the lower die of the CNC bending machine V=thickness t*6 can meet the processing requirements, and it also means that when processing aluminum, the material and hardness of the lower die of the bending machine must be The mold requirements are higher than ordinary materials, and the R angle of the notch must be more than 1.5mm, so that the damage to the workpiece during bending is less, and the indentation is relatively shallow.

If the processing method is suspended bending or closed bending, the notch of the lower die of the bending machine mold can be reduced accordingly, because the bending method does not require the upper and lower dies to be pressed to form. Reducing the width of the notch will also make the angle of the processed product more beautiful. The width of the bending notch also determines the size of the R angle at the corner of the workpiece. If you want the processed product not to form an R angle, it is best to plan grooves at the bending point before processing, so that the processed rice metal parts will have very standard bending angles and no R angle will affect the appearance. Therefore, the width of the notch of the lower die of the CNC bending machine should be reasonably designed and produced according to the accuracy of the product, the material of the product, and the bending angle of the product, rather than simply calculated based on the thickness of the sheet. This is neither scientific nor It is not in line with common sense. According to the product requirements, choose the most suitable notch of the lower die of the CNC bending machine, and the product qualification rate will be higher.