Vertical loading and clamping five-edge cutoff blade for rough machining

Abstract

The invention discloses a vertical loading and clamping five-edge cutoff blade for rough machining. The shape of the blade is a convex pentagon, and the vertical plane of each angle of the convex pentagon is provided with a cutting edge; a chamfered edge, a chip discharge groove and a chip breaker are arranged on each cutting edge; the lower edge of a knife point and the vertical direction of the cutting edge form an included angle alpha, the chamfered edge is arranged at the transition position of the chip discharge groove, and the chip discharge groove and the horizontal direction of the cutting edge form an included angle gamma; the chip discharge groove has an inward concave fan-shaped surface, and the radius r of the upper arc of the surface center line of the fan-shaped surface is 2 to 5 millimeters; and the chip breakers comprise two transverse chip breakers and a longitudinal chip breaker, the two transverse chip breakers are symmetrically distributed on two sides of the center line of the cutting edge, and the fixed width e is 0.1 to 0.5 millimeter. Due to the chip discharge groove of the inward concave fan-shaped surface and the cutting edges of big positive rake angles, the discharge of the residual chips is more directive, the chip discharge problem is radically solved, the service life of the blade is remarkably prolonged, and the surface quality of a processed workpiece is remarkably improved.

Description

technical field [0001] The invention relates to a turning and cutting tool in the field of metal cutting, in particular to a vertically mounted five-blade cutting tool for rough machining that is mainly used for turning and cutting, and has multiple functions such as grooving and finishing chamfering. blade. Background technique [0002] In the rough machining process of conventional turning and cutting, the cutting blade is mainly used to cut off the bar material on lathes and automatic machine tools. During the cutting process of conventional cutting blades, chip removal in the cutting area is difficult, cooling is insufficient, the thickness of the cutter head is small, the outstretching arm is long, and the rigidity is poor. The force is significantly increased compared with the beginning of cutting, and vibration and extrusion will occur. In order to solve the above technical problems, the main methods currently adopted in China are as follows: [0003] 1. Due to the...

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Problems solved by technology

[0006] In order to solve the above-mentioned problems existing in the prior art, the present invention designs a vertically mounted five-edge cutting blade for rough machining, which can solve the difficulty of chip removal in the cutting area, insufficient cooling, and poor rigidity of the cutter head during the cutting process. When the cutting is close to the center of the bar material, the cutting force increases significantly, resulting in vibration and extrusion. It can also solve the technical problems of severe blade wear and poor surface performance of the workpiece after machining, and improve the service life and processing efficiency of the blade.

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