Forming die for rear cover inner plate

Abstract

The invention relates to the field of rear cover plate production equipment, in particular to a forming die for a rear cover inner plate. The forming die comprises an upper die base, a lower die base and a hold-down ring; an upper die female die for plate piece forming is arranged on the upper die base; a lower die male die adapted to the upper die female die and used for the plate piece forming is arranged on the lower die base; the hold-down ring comprises an upper hold-down ring part connected with the upper die base through a power component, and a lower hold-down ring part connected with the lower die base through a power component; and the hold-down ring is in contact with a plate piece earlier than the upper die female die and the lower die male die. Through the improvement on a traditional die and movement desynchronization of the hold-down ring and the upper die female die, the effect that the forming die becomes a novel die structure and a stamping die which can raise a material utilization ratio is realized; the forming die is simple in working principle, novel in shape and compact in layout; plate piece wrinkling can be improved significantly; the plate piece quality and the material utilization ratio can be improved and raised; the plate piece plastic deformation is increased; and the probability of plate piece rebound is reduced.

Description

technical field [0001] The invention relates to the field of production equipment for the inner panel of the rear cover, in particular to a molding die for the inner panel of the rear cover. Background technique [0002] For a long time, the method we have used to improve the utilization rate of materials in the process design of the inner panel is to reduce the drawing depth, improve the height of the remaining meat, and adjust the drawing bead. The remaining meat and the drawing bead are largely determined by the product itself. It depends on the problem, and for reducing the drawing depth, our usual method is to set the drawing surface of the inner panel to the lowest point of the profile of the inner panel, and the extreme method is to set the process of the inner panel It is made into reverse forming, but once we use reverse forming, we will face more technical problems. The reverse forming will make the wrinkling problem of the inner plate more serious. Therefore, when...

AI Technical Summary

Problems solved by technology

[0002] For a long time, the method we have used to improve the utilization rate of materials in the process design of the inner panel is to reduce the drawing depth, improve the height of the remaining meat, and adjust the drawing bead. The remaining meat and the drawing bead are largely determined by the product itself. It depends on the problem, and for reducing the drawing depth, our usual method is to set the drawing surface of the inner panel to the lowest point of the profile of the inner panel, and the extreme method is to set the process of the inner panel It is made into reverse forming, but once we use reverse forming, we will face more technical problems. The reverse forming will make the wrinkling problem of the inner plate more serious. Therefore, when we are faced with customers who have strict requirements on material utilization , the situation is inevitably passive

[0003] The inner panel of the rear cover is a typical inner panel on the car body. Usually, the drawing of the inner panel of the rear cover is a single-action form of a single blankholder. The upper die is first closed with the blankholder, and the blankholder passes through the air cap. The rod provides the blank holder force to form the drawbead, and then the upper die and the blank holder ring drive the plate downward, and directly contact the punch to start forming. Even if the drawing depth of the traditional drawing die has been designed to the lowest point of the product, but in this way The process technique is still not ideal for the utilization rate of materials, so a new type of drawing die is needed to improve the utilization rate of materials

Images