Aluminum-plastic film shell-punching residual stress on-line detection method

Abstract

The invention provides an aluminum-plastic film shell-punching residual stress on-line detection method, wherein the method comprises the following steps: step 1, punching a shell by an aluminum-plastic film, so as to complete the shell punching of the aluminum-plastic film by a shell punching mechanism; step 2, carrying out CCD photographing, and completing photographing of pictures of a side sealing edge and a top sealing edge of the aluminum-plastic film after shell punching by a camera; step 3, calculating the curling area, and obtaining the curling area S1 of the side sealing edge and thecurling area S2 of the top sealing edge through integral calculation according to the shot pictures of the side sealing edge and the top sealing edge; and step 4, calculating the curling degree, andaccording to the formula R=K1S1+K2S2+b, calculating to obtain the aluminum-plastic film punched shell crimp degree R, wherein K1 is a coefficient related to S1, K2 is a coefficient related to S2, b isa formula correction number, and values of K1, K2 and b are obtained through normalization of a data simulation graph before the crimp degree R is calculated. According to the method, on-line detection can be achieved, the residual stress after shell punching of the aluminum-plastic film can be accurately evaluated, poor curling can be found in time, and batch defective products are avoided.

Description

technical field [0001] The invention relates to the technical field of aluminum-plastic film production equipment, in particular to an on-line detection method for aluminum-plastic film shell punching residual stress. Background technique [0002] The aluminum-plastic film is mainly composed of nylon layer, aluminum foil layer and CPP layer. Due to the different stress of the raw material nylon layer and CPP layer, and the effect of tension on the equipment during the composite process of nylon layer, aluminum foil layer and CPP layer, it will affect the The aluminum-plastic film causes a certain tensile deformation to produce residual stress, which will be released when the aluminum-plastic film is punched, resulting in different degrees of curling. The residual stress is proportional to the degree of curling, that is, the greater the residual stress, the greater the degree of curling. bigger. [0003] The existing residual stress detection method is offline detection and ...

AI Technical Summary

Problems solved by technology

[0003] The existing residual stress detection method is offline detection and evaluation, which is evaluated by measuring the angles of side seals and top seals. However, when curling occurs, the residual stress after punching the aluminum-plastic film cannot be accurately evaluated; Batteries are all highly automated continuous production, there is no personnel inspection process in the middle, and when there is a curl defect, it cannot be found in time, resulting in the production of batch defective products

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