Blanking method for small triangular workpiece

Abstract

The invention provides a blanking method for small triangular workpieces. The blanking method comprises the following steps that S1, two small triangular workpieces are arranged in a mode that bevel edges are parallel and opposite, the vertex of an acute angle of a short straight edge of the first small triangular workpiece is adjacent to the vertex of an acute angle of a long straight edge of the second small triangular workpiece, and the long straight edge is parallel to a supporting plate of a workbench; S2, a laser cutting head sequentially carries out cutting along the short straight edge and a long straight edge of the first small triangular workpiece, transitions to the second small triangular workpiece and sequentially carries out cutting along a short straight edge, the long straight edge and the bevel edge of the second small triangular workpiece, and a cut-off point of the second small triangular workpiece is located at the vertex of an acute angle of the short straight edge of the second small triangular workpiece; and S3, the laser cutting head transits back to the first small triangular workpiece and carries out cutting along the bevel edge of the first small triangular workpiece, and a cut-off point of the first small triangular workpiece is located at the the vertex of the acute angle of the short straight edge of the first small triangular workpiece. According to the blanking method, collision with the laser cutting head can be avoided, so that the product quality is guaranteed, the production efficiency is greatly improved, and the cost is saved.

Description

technical field [0001] The invention belongs to the field of rail vehicle workpiece processing, and in particular relates to a blanking method for small triangular workpieces. Background technique [0002] Many small triangular workpieces are used in rail vehicle body, chassis and other parts, such as figure 1 As shown, the length of the short straight side of the small triangular workpiece is a (a<50mm), and the length of the long straight side is b (b>50mm). The workshop usually adopts CNC laser cutting for blanking. The workbench of the CNC laser cutting machine used in the workshop is composed of multiple support plates. A single support plate is a steel plate with a thickness of 3mm. There are two types of contour shapes—— figure 2 shown in the first support plate 1 and image 3 As shown in the second support plate 2, the tops of the two support plates are in a jagged shape, such as Figure 4 As shown, the horizontal distance between two adjacent tooth tops 1...

AI Technical Summary

Problems solved by technology

However, since the thickness of the plate to be cut is generally more than 2 mm, special tools are required to knock the workpiece away from the plate at the joint between the workpiece and the base material. It is very large, which not only increases the working hours, but also reduces the production efficiency; the workpiece and the sheet are separated by knocking, resulting in poor surface roughness at the separation position; the arc must be restarted after each cutting, and continuous cutting is not possible

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