A Method for Dealing with Ridge Slip Defect
A ridgeline and defect technology, which is applied in the field of stamping dies for automobile outer panels, can solve the problems of inability to meet the quality requirements of sheet metal, failure to meet the requirements of the OEM for the appearance of parts, and difficulty in ridgeline slip defects.
Active Publication Date: 2020-07-07
东风模具冲压技术有限公司
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Problems solved by technology
However, when the ridge R is less than 6mm, the included angle is less than 165 degrees, and the slippage is greater than 5mm, it is basically impossible to meet the sheet metal quality requirements through on-site debugging.
[0004] With the development of body design and customers' higher and higher requirements for the clarity of ridgeline features, a large number of cars have begun to use ridgelines that do not exceed R5, which brings greater difficulties to the solution of ridgeline slip defects , according to the original repair plan, it can no longer meet the requirements of the OEM for the appearance of the parts
Method used
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Embodiment 1
[0046] Take the outer panel of a certain vehicle hood as an example, such as Picture 11 with 12 As shown, the stamping part has both ridgeline R3 and ridgeline R5. Through CAE simulation analysis, the maximum slip of CAE simulated slip zone A'3 is 15mm, the maximum material thickness reduction is 0.15mm, and the CAE simulation The maximum slip of the slip zone A'5 is 20mm, and the maximum material thickness reduction is 0.25mm. Therefore, the width of the strong pressure zone B3 corresponding to the ridge line R3 is set to 20 mm, the strong pressure amount is set to 0.25 mm, the width of the strong pressure zone B5 corresponding to the ridge line R5 is set to 25 mm, and the strong pressure amount is set to 0.20 mm. Since the surface curvatures here are all negative, the transition zone is set from the strong pressure zone to the end point of negative curvature.
[0047] Such as Figure 13 As shown, the concave mold corresponding to the ridgeline R3 and the ridgeline R5 are made ...
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The invention relates to a method for processing a ridge slippage defect. The method for processing the ridge slippage defect comprises the steps of profile reservation and precise fitting; in the step of profile reservation, a strong press area and a concave R empty open shape are formed in a female mold, the width of the strong pres area is the maximum slippage of the CAE simulated slippage areaplug 5 mm, the strong press amount is the material thickness thinning maximum value of the CAE simulated slippage area plus 0.10 mm, the concave R empty open shape is selected according to the numerical value of the R, when R is smaller than 3, normal craving of an empty open groove of 0.5 mm or 1.0 mm, and when R is larger than or equal to 3, a empty open shape large than 0.3 mm is formed. By the adoption of the method for processing the ridge slippage defect, a stamping die can be rapidly debugged, and the quality of the stamping die is improved.
Description
Technical field [0001] The invention belongs to the technical field of stamping dies for automobile outer panels, and in particular relates to a method for processing ridgeline slippage. Background technique [0002] In recent years, various automobile OEMs have increasingly pursued visual effects in the design of external covering parts, so a large number of extremely small R ridges have appeared on the modeling surface. The production of the ridge line R is mainly processed in the drawing process. Before the stamping to the bottom, the sheet material and the mold punch will still flow for a certain distance after contact with the surface of the mold punch. Before the die is drawn to the bottom, the sheet material will harden after contacting the R-shaped surface of the punch ridgeline, and the thickness of the material will be significantly reduced compared to the nearby area. The die continues to move the sheet material to slide on the ridge line R. At this time, the force of...
Claims
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IPC IPC(8): B21D37/20
CPCB21D37/20
Inventor 李成刘明何奇志
Owner 东风模具冲压技术有限公司