Forming machine for bimetallic strip

Abstract

The invention discloses a forming machine for a bimetallic strip. A forming mold structure is arranged in a forming guide rail; the forming mold structure comprises an inner mold, a positioning jacking rod is arranged behind the inner mold, and a gap is reserved between the inner mold and the positioning jacking rod; an inner mold pushing rod is arranged in front of the inner mold, a forming stepping motor is arranged in front of the inner mold pushing rod, the positioning jacking rod is connected with a material pressing air cylinder, and the material pressing air cylinder is arranged on theposition, on the upper portion of a machine body, of a rack; two sets of lifting positioning clamps are arranged on the position, at the intersection of the extending line of a second feeding guide rail and a forming guide rail, of the left side and the right side of the forming guide rail correspondingly; a gap is formed between each set of lifting positioning clamps; a head end bending forming mold is arranged on the right side of the lifting positioning clamp on the right side and connected with a shaping air cylinder; and two movable idler wheels are arranged on the position, behind the lifting positioning clamps, of the left side and the right side of the forming guide rail correspondingly. In the process of using the forming machine to bend a material belt, damage to the surface of the material belt and the bent position of the material belt is avoided, the stroke of the mold is easy to control, and the service life is long.

Description

Technical field [0001] The invention relates to a forming machine, in particular to a bimetal sheet forming machine. Background technique [0002] Our company has been engaged in the research and development and production of vacuum circuit breakers for a long time. Among the aviation circuit breakers produced by our company, there is a key part that requires the use of bimetallic strips. The bimetallic strip structure is as attached Picture 11 Shown. The existing bimetal sheet forming method mainly includes two forms, one is a rigid hard mold forming method, and the other is a soft and hard mold matching forming method. However, there are many problems in the molding process of these two methods. Rigid hard mold forming method as attached Picture 12 As shown, there are the following defects: 1. In the initial stage of the material, it is easy to cause damage to the workpiece at point a on the surface of the lower die surface; 2. In the initial stage of feeding, the bending of ...

AI Technical Summary

Problems solved by technology

However, there are many problems in the molding process of these two methods.

Rigid die forming method as attached Figure 12 As shown, there are the following defects: 1. In the early stage of feeding, it is easy to cause damage at point a on the surface of the lower die surface of the workpiece; 2. In the early stage of feeding, affected by the hardness of the workpiece, it is easy to cause a sudden change at the bending point b on the top of the workpiece, although it can pass through the mold Bottom correction, but it is easy to cause metal damage at the mutation point of the workpiece; 3. The stroke of the mold is not easy to control, and the over-stroke will easily cause the arc end of the workpiece to be over-extruded and thinned, causing resistivity changes

Insufficient travel can easily cause the arc surface of the workpiece to be out of round and have sudden changes, which will eventually affect the service life and temperature curvature of the workpiece; 4. The stress of the formed workpiece is uneven

The soft and hard molds are combined with the molding method as attached Figure 13 As shown, there are the following defects: 1. Compared with the rigid die, the damage to the surface of the workpiece is less, and the stress distribution is more uniform

However, since the soft film has no correction effect on the workpiece when the mold is lowered, it cannot effectively solve the phenomenon of point a at the arc end of the workpiece; 2. The service life of the mold is short

Images