Cutting blade for processing soft metal materials

Abstract

The invention discloses a cutting blade for processing soft metal materials. The cutting blade comprises an upper surface, a lower surface, a pair of side faces and a blade body which is enclosed by a conical surface for connecting the pair of side faces. The blade body is provided with a blade positioning hole, and the upper surface and the lower surface are connected through the pair of side faces and the conical surface. The conical surface and the upper surface are intersected into a main cutting edge, and the two side faces and the upper surface are intersected into two side cutting edges which are respectively connected on two sides of the main cutting edge. The upper surface is sunk toward the lower surface to form a rake face, a concave curved surface for guiding chips and more than two chip breakers in a shape of an elliptical lug boss. The chip breakers are uniformly distributed in a height increasing stepped shape from a position close to the main cutting edge to the blade positioning hole. The concave curved surface is connected between two adjacent chip breakers; and the rake face extends toward the middle of the upper surface from the main cutting edge and two side cutting edges, and is connected with the concave curved surface. The cutting blade has the advantages of controlling shapes and flow directions of the chips, decreasing the contact between the chips and the upper surface of the blade, and reducing the cutting temperature.

Description

technical field [0001] The invention relates to a turning insert for metal cutting, in particular to a cutting insert for processing soft metal materials. Background technique [0002] The turning insert structure for processing soft metal materials generally has a sharp rake angle and a chip removal space with a large opening. In this type of structure, there is a plane or an arc between the rake face and the chip removal platform connected face to face. In this way, during the cutting process, the chips are removed by the cutting edge at the tip of the insert, and then slide along the rake face to the plane or arc surface connected with the chip removal platform, and then are discharged through the chip removal platform. For soft metal materials, an initial bend will be obtained during the machining process, and the chips may move and extend along the rake face on the chip removal platform in an integral form, and naturally curl and fall, causing the cutting temperature t...

AI Technical Summary

Problems solved by technology

For soft metal materials, an initial bend will be obtained during the machining process, and the chips may move and extend along the rake face on the chip removal platform in an integral form, and naturally curl and fall, causing the cutting temperature to rise during the cutting process. High, for the processing of soft metal materials, the contact between chips and the rake face and the increase of cutting temperature will make the chips stick to the rake face of the insert, resulting in changes in the actual machining rake angle of the insert

During this process, the curling of the chips, the flow direction of the chips and the contact between the chips and the rake face cannot be artificially controlled or predicted, and the chips are also difficult to break, causing the chips to entangle with each other and damage the surface of the processed workpiece, resulting in product finish that cannot meet the requirements

[0003] In the prior art, such as U.S. Patent US6217264B1 discloses a cutting insert with an improved chip breaker, which controls the contact between the chip and the rake face at the chip removal platform, which can reduce the cutting temperature, but there is no cutting edge at the tool tip. The structure of the chip introduction and the connection between the tool tip and the rake face are too smooth, and the curling and flow direction of the chips are not well controlled during the cutting process

Images