45-degree corner cutting and punching mould for doorframe semi-finished product

Abstract

The invention provides a 45-degree corner cutting and punching mould for a doorframe semi-finished product, comprising a male mould and a female mould, wherein a 45-degree corner cutting upper cutting edge is arranged at the lower end of the male mould, a 45-degree corner cutting lower cutting edge is arranged on the upper end of the female mould, wherein the shape of the 45-degree corner cutting lower cutting edge is coincident with that of the 45-degree corner cutting upper cutting edge, the upper surface of the 45-degree corner cutting lower cutting edge is in a curve shape coincident with the cross-section shape of the doorframe semi-finished product, the lower surface of the 45-degree corner cutting upper cutting edge is in a sectional incremental shear curve shape, and the 45-degree corner cutting upper cutting edge is arranged corresponding to the 45-degree corner cutting lower cutting edge, and forms a sectional incremental shear structure for the doorframe semi-finished product with the 45-degree corner cutting lower cutting edge. The 45-degree corner cutting punching mould for the doorframe semi-finished product has the beneficial effects that: the lower surface of the 45-degree corner cutting upper cutting edge is in the sectional incremental shear curve shape, and forms the sectional incremental shear structure for the doorframe semi-finished product with the 45-degree corner cutting lower cutting edge, therefore, the punched doorframe cannot generate edge deformation, has little burrs, dispenses with secondary processing and is orderly and attractive.

Description

technical field

[0001] The invention relates to a blanking die, in particular to a 45-degree angle-cutting blanking die for a door frame semi-finished product. Background technique

[0002] The door frame includes two side frames and an upper frame. When the two side frames and the upper frame are connected, a 45-degree cut angle is required at the joint of the door frame to make the connection between the side frame and the upper frame more smooth and beautiful; usually , the forming steps of the door frame are as follows: After the metal plate conforming to the specification is preliminarily formed by rolling and rolling, the semi-finished door frame is obtained, and then the semi-finished door frame is cut at 45 degrees. Get the finished door frame.

[0003] In the existing corner cutting die, the lower end of the punch is in a straight line shape. During punching, the semi-finished door frame with a curved cross section will be deformed, and trimming is required after t...

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