Drawing die structure with double press materials feeding and punching method utilizing drawing die structure

Abstract

The invention relates to a drawing die structure with double press materials feeding, which comprises an upper die and a lower die, and is characterized in that the upper die comprises an upper die seat (1), a concave die (2), a first press material feeding plate (3), a second press material feeding plate (4), a spring or a nitrogen cylinder (9) and a limit screw (10), wherein the upper die seat (1) is connected onto an upper slider of a punching machine, the limit screw (10) is fixed on the upper die seat (1), and keeps pace with the movement of the upper die seat (1), the spring or the nitrogen cylinder (9) is clamped between the upper die seat (1), the first press material feeding plate (3) and the second press material feeding plate (4), and a pressing side ring (5) drives a top rod (8) through a lower slider through of the punching machine, and enables the movement direction of the pressing side ring (5) to be a +_ Z direction during the punching process. The drawing die structure with double press materials feeding can effectively prevent the forming detect that automobile sheet metal parts wrinkle during the drawing process, reduces debugging time and difficulty of a drawing die, reduces postorder reshaping procedures of regions, reduces manufacturing costs of the drawing die, and reduces development cycle of the drawing die.

Description

technical field [0001] The invention relates to a stamping die technology, in particular to a drawing die structure with double upper pressing materials and a stamping method using the structure. Background technique [0002] Automobile panels have structural characteristics such as large overall size, relatively small thickness, complex shape, and partial shape inside the contour. The drawing die is an effective cold stamping process that can quickly realize most of the complex features of the product at one time. [0003] For the structure of the sealing surface of the waistline of the window frame of the inner panel of the car door, which has a large curvature change and a large height difference of the window frame, the sheet material in the sealing surface area of ​​the waistline of the window frame is in contact with the product when drawing with a traditional drawing die Inconsistency, causing the sheets to gather and cause wrinkles or even stacking. [0004] For the...

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Problems solved by technology

[0003] For the structure of the sealing surface of the waistline of the window frame of the inner panel of the car door, which has a large curvature change and a large height difference of the window frame, the sheet material in the sealing surface area of ​​the waistline of the window frame is in contact with the product when drawing with a traditional drawing die Inconsistency, causing the sheets to gather and cause wrinkling or even stacking

[0004] For the inner panel of the tailgate with a structure with a sharp change in the radian of the window frame and a large height difference of the window frame, the traditional drawing die structure is used to produce wrinkling and overlapping defects at the waistline of the tailgate window frame after drawing

This forming defect cannot be eliminated and improved even with stamping processes such as subsequent shaping and pressing, which not only wastes a lot of time for mold adjustment and repair, but also increases the cost of mold development, affects the progress of product sample delivery, and even affects the timing of the vehicle's launch, resulting in economic losses. huge

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