90-degree bending mechanism for sheet metal stamping die

Abstract

The invention provides a 90-degree bending mechanism for a sheet metal stamping die; the 90-degree bending mechanism comprises a lower floating block, a pressing plate, and a male bending unit, wherein the lower floating block is connected with a lower die through a lower pull rod and a lower nitrogen spring; the pressing plate is connected with an upper die through an upper pull rod and an upper nitrogen spring, and the male bending unit is used for 90-degree bending; the male bending unit is arranged at the lower die and is located beside the lower floating block; the pressing plate corresponds to the lower floating block and is arranged above the lower floating block; the male bending unit is hinged at the lower die in a form of capable of rotating inwards the die; an outwards convex inner inclined surface is arranged at an inner side of the top part of the male bending unit; an inwards concave outer inclined surface is arranged at an outer surface of the top part of the male bending unit; an outer side surface of the pressing plate is of an inwards concave inclined surface shape, and specifically is of an avoiding inclined surface used for avoiding the male bending unit; the bending mechanism provided by the invention is novel in structure; when performing the 90-degrees bending to a sheet metal component by using the bending mechanism, negative angle bending used for compensating bending springback is achieved on the basis of the 90-degree bending is finished by using one set of stamping die via one stamping process, so that a 90-degree bending angle is ensured to be qualified, and die cost is saved, and meanwhile, a stamping process is reduced.

Description

technical field [0001] The invention relates to a 90-degree bending mechanism for a sheet metal stamping die capable of compensating bending springback. Background technique [0002] In the machinery industry, stamping dies are often used to bend sheet metal parts, and the folded edges after bending usually have a certain degree of bending springback, resulting in unqualified bending angles. When the required bending angle of the sheet metal part is greater than 90 degrees, you can directly bend a certain angle to compensate for the bending springback, so as to ensure that the bending angle is qualified; however, when the required bending angle of the sheet metal part is 90 degrees If you want to bend a certain angle to compensate for the bending springback, the bending angle of the sheet metal part at this time is actually less than 90 degrees, that is, it is necessary to bend the sheet metal part at a negative angle to ensure that the bending angle is qualified. [0003] ...

AI Technical Summary

Problems solved by technology

With this conventional bending method, although the negative angle bending can be completed to achieve the purpose of compensating the bending springback and ensuring the bending angle is qualified, two sets of molds and two processes are required, which not only requires high mold costs, but also requires many processing procedures.

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