Control method of sheet material inflow in drawing die of automobile sound-proof double-layer sheet

Abstract

The invention provides a method for controlling the inflow of sheet material into a drawing die of a sound-insulating double-layer sheet for an automobile, comprising the following steps: obtaining a theoretical shrinkage line, a theoretical lamination line, and a hundredth line of theoretical measurement coordinates; obtaining the lamination line and the shrinkage line , measure the coordinate hundred line; measure the distance between the press line and the shrinkage line corresponding to each point of the measurement coordinate hundred line, and obtain the theoretical sheet material inflow at this point; obtain the actual shrinkage line and the actual press line, Measure the actual sheet inflow; adjust the R angle of the drawbead and the drawing groove so that the actual shrinkage line is parallel to the theoretical shrinkage line, and ensure that the actual sheet inflow value and the theoretical sheet inflow value of each point on the measurement coordinate hundred-digit line The difference does not exceed 3%. The invention clearly and accurately reflects the theoretical analysis results into the actual mold, and forms an accurate and clear comparison with the shrinkage amount of the adjusted sheet metal of the actual parts, thereby controlling the boundary forming of the sheet material and the rebound size of the parts.

Description

technical field [0001] The invention relates to the field of stamping of automobile cover parts; [0002] In particular, the invention relates to a method for controlling the inflow of sheet material into a drawing die of an automobile sound-insulating double-layer sheet. Background technique [0003] With the advancement of automobile manufacturing technology, people pay more and more attention to the control of noise and vibration in the passenger car, and the control level of the noise in the car has become one of the important symbols to measure the quality of passenger cars. Among them, the sound-insulating double-layer steel plate for automobiles uses engineering composite interlayer binder materials to achieve shock absorption and noise reduction between the two steel plates, and each engineering composite polymer interlayer is based on eliminating the different designed for frequency noise. Since the composition of the polymer interlayer can be adjusted to reduce v...

AI Technical Summary

Problems solved by technology

[0004] The car sound insulation double-layer panel is a two-layer panel. In addition to the common sheet metal forming problem, the part springback size, the difficulty is that the PATCH boundary of the second layer panel after debugging deviates from the theoretical analysis boundary, which is difficult to control

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