Ultra thin reed forming die

Abstract

The invention relates to an ultra thin reed forming die, comprising an upper die and a lower die which are connected and are provided with a plurality of upper cores and lower cores; the upper die and the lower die are provided with connected reed support positioning surfaces which are configured mutually and are vertical to the moving direction of the upper core and the lower core; the lower end of the front vertical plane of the upper core is provided with a springback angle beta which is inclined inwards along the moving direction; the bottom surface of the upper core is provided with a springback surface which is vertical to the moving direction; the upper end of the rear vertical plane of the lower core is provided with a prebending angle alpha which is inclined outwards along the moving direction; the rear vertical plane of the lower core and the front vertical plane of the upper core correspond; the cross section of the upper core is set as a section with arc rectangles at the front side and the rear side; and the springback angle beta and the springback surface are arranged at the front side of the arc section. The invention has the advantages of being capable of greatly improving geometric accuracy and geometric tolerance of the reed in the process of bending and pressing, and being capable of realizing the accordance of stress points and deformation amount of a plurality of reeds between the upper die and the lower die, thus being capable of greatly improving qualification rate of products and reducing the cost of products.

Description

technical field [0001] The invention relates to the field of a thin-plate type spring leaf stamping die; in particular, it relates to an ultra-thin spring leaf forming die. The ultra-thin reed is matched and used in the lens driving mechanism of the miniature camera. Background technique [0002] The whole of the existing ultra-thin reed is in the shape of a thin sheet. The reed is composed of a ring-shaped outer profile and a ring-shaped inner profile located inside the outer profile. There is a distance between the inner wall of the outer profile and the outer wall of the inner profile. Left and right power supply pins are arranged on the side of the outer profile for use as Conductive terminal, the power supply pin is perpendicular to the plane of the reed, the pin forms an electrical circuit with the coil in the lens driving mechanism and generates electromagnetic force to push the lens to move back and forth in the direction of the optical axis, the reed The generated...

AI Technical Summary

Problems solved by technology

However, due to the ultra-thin size and the structural characteristics of the spring wire connection of the inner and outer profiles during the molding and bending process of the independent mold, the reed has large elastic deformation and poor overall rigidity; and the power pin is formed by the independent It is difficult to keep the force point and deformation control consistent during the bending and pressing molding process of the mold, which makes it difficult for the geometric accuracy and shape and position tolerance of the ultra-thin reed to meet the design requirements, resulting in a low product qualification rate and poor product quality. higher cost

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