Cutting blade and milling tool using same

Abstract

The invention discloses a cutting blade and a milling tool using the same. The cutting blade comprises a cutting blade body, which is slightly in a regular triangle plate shape and comprises an upper surface, a lower surface, and side surfaces, which connect the upper surface and the lower surface; the positions between two neighbored side surfaces are individually provided with an arc protruded part relative to the center of the cutting blade, each arc protruded part intersects with the upper surface and forms a protruded first arc cutting blade relative to the circumstance, and each first arc cutting edge forms corresponding summits of a regular triangle through the intersection line between the upper surface and each side surface, and the extension line of the intersection line. The cutting blade and the milling tool using the same has the characteristics of strong profile copying performance, good economy, convenient installation, high positioning precision, large clamping force, and high processed surface quality.

Description

technical field [0001] The invention relates to the field of metal cutting tools, in particular to a milling tool used for profiling cutting materials and a cutting insert detachably mounted on the milling tool. Background technique [0002] In profiling cutting, since the surface to be machined is almost always a curved surface structure, the cutting edge of the cutting insert is required to be an arc edge, and the radius of the arc edge of the cutting insert must be smaller than the arc radius of the machined surface. In this way, the radius of the arc edge directly affects the profiling cutting ability of the blade. In general, the smaller the radius of the arc edge, the stronger the profiling cutting ability of the cutting insert and the wider the application range. [0003] In profiling cutting, circular inserts are generally used, figure 1 It is a cutting insert for profiling in the prior art. The insert body 100 is roughly in the shape of a conical plate, including ...

AI Technical Summary

Problems solved by technology

However, since the cutting edge 107 of the circular blade is arc-shaped, the forces on the margins are uneven, and the difference is large. The tool needs a fastener with a large diameter to provide a larger clamping force. Therefore, the mounting hole 109 of the circular blade generally has a larger radius. There must be enough space between the holes 109, so the arc radius of the cutting edge of the circular insert is generally large, and its profiling cutting ability is greatly limited

Generally, the arc radius of the cutting edge of the circular insert is more than 3mm, and it is impossible to process the curved surface with the arc radius less than 3mm

In particular, in the profiling milling process, the circular insert and the cutterhead mounting seat are matched by a conical surface. Due to the existence of machining accuracy and assembly accuracy, the conical flank 108 of the insert and the positioning surface of the cutterhead It is difficult to ensure the coincidence accuracy, which makes it difficult to control the vibration of the cutting edge after the blade is assembled on the cutter head, and it is difficult to guarantee the processing quality of the milling tool equipped with a circular blade in the profiling cutting process

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