Bending method of door cover type side mold
A door cover and side mold technology, which is applied in the direction of forming tools, feeding devices, manufacturing tools, etc., can solve the problems of large errors and affect the state of edge joining, achieve high precision, improve precision, and avoid human waste.
Active Publication Date: 2020-09-22
泊头市兴达汽车模具制造有限公司
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Problems solved by technology
The surface made in this way often has a large error, too high or too low will affect the final edge state. At present, there is no mature method in the industry that can guide craftsmen to design the pre-bent surface
Method used
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Embodiment
[0051] Example: such as Figure 14 , Figure 15 , Figure 16 and Figure 17 As shown, A=93 degrees, B=45 degrees, R=1.1, so the B value of this position is: B=1.1 / TAN(45 / 2)-1.1 / TAN(93 / 2)=1.61, through UG software Use the surface extension command to extend 1.61mm outward from the flange intersection, and then use the surface bending command to bend 45° to obtain the required pre-bending surface 2, which is just tangent to the fillet R , Surface extension and surface bending are the basic modeling commands of UG software, and other three softwares also have the same function.
[0052] In the actual application process, first determine the characteristics of the product 10 that needs to be bent, determine the verticality of the overturning according to the principle in the second step, and determine the R-angle arc according to the ideal state of the pre-bending surface 2 described in the third step The value of 3, the extreme is the vertical corresponding to B, and then use...
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Abstract
The invention provides a bending method of a door cover closing die and belongs to the field of bending technology of automobile opening and closing parts. The bending method includes: 1), determiningover-flanging value, wherein a product moves inward when the flanging edge is pre-coated and fully coated, and over-flanging is considered on flanging contour lines of a single die; 2), setting an included angle alpha between the product surface and the flanging not to exceed 105 degrees as the above flanging surface; 3), determining the position of a pre-bending surface, wherein the pre-bendingsurface and a closed edge bending R-angle arc are arranged tangently, R value is consistent with the outer fillet of an outer plate product, and the R-angle arc is in tangent arrangement with a pressing surface and a product surface after pressing; 4), selecting reasonable pre-bending assemblies, namely selecting the pre-bending assemblies of different types according to different parts and different flanging included angles of parts to complete pressing actions. In the method, the position of the pre-bending surface and the R-angle arc are precisely set to be tangent, and quality in bending is improved.
Description
technical field [0001] The invention belongs to the field of bending technology of opening and closing parts of automobiles, and relates to a bending method of side closing molds such as door covers. Background technique [0002] Hemming of automobile opening and closing parts (doors, hoods, back doors or trunks) is a necessary process in automobile manufacturing. There are two types of hemming, robot hemming and hemming mold hemming, and mold hemming is generally divided into two steps Completion: pre-bending and pressing, that is, putting the inner plate and its welding accessories into the outer plate, first relying on the pre-bending components to pre-press into an angle close to 45°, and then the pressing knife of the upper mold continues to work to complete the final pressing, good The pre-bending state is a prerequisite to ensure the quality of pressing and final edge bonding. For the stamping technicians, how to design the pre-bending surface, there is currently no r...
Claims
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IPC IPC(8): B21D39/02B21D37/10B21D43/00
CPCB21D37/10B21D39/021B21D43/003
Inventor 尹永铎况亚
Owner 泊头市兴达汽车模具制造有限公司