Solid carbide drill chip breaker groove for steel part and design method thereof

Abstract

The invention discloses a solid carbide drill chip breaker groove for a steel part and a design method of the solid carbide drill chip breaker groove for the steel part. The structure of the solid carbide drill chip breaker groove for the steel part is as follows: one end of a chip rolling groove is a negative chamfered edge, the other end thereof is a chip breaker table, and the chip rolling groove is arranged at a joint point of the chip breaker table R. The design method of the solid carbide drill chip breaker groove for the steel part comprises the following steps of: 1, selecting a five-axis grinding centric device; 2, selecting a diamond grinding wheel in a type of 75 degrees as a grinding wheel; and 3, carrying out the specific operation as follows: 1) adopting an imported five-axis-linked grinding center, and setting a cutting blade-blade angle of inclination in a machining center program; 2) setting the thickness of a drill core according to 26% of diameter of the drill of the steel part; and 3) enabling a solid carbide drill of phi(10) to have the following specific parameters of chip rolling and chip breaking requirements: a front angle is 10 degrees, the thickness of the core is 2.5 mm, a tilt angle is 8 degrees and an angle of declination of the grinding wheel is 3 degrees. The solid carbide drill chip breaker groove for the steel part has the following advantages that: the temperature of a cut region is lowered, the durability of a cutting tool is improved, the winding of cut chips on a cutter handle and the cutting tool are effectively avoided, the chip blocking is avoided, the breaking phenomenon of the cutting tool, caused by the chip blocking, is eliminated, the high-speed cutting is completely adapted, and the cutting requirement of high-strength steel is met.

Description

technical field [0001] The invention relates to a solid carbide drill chip breaker for steel parts and a design method thereof. Background technique [0002] The general method of making drill bits in our country is to select the corresponding special groove milling cutter according to the diameter of the groove of the drill bit. The country has standards in this regard. Ordinary high-speed steel drills have slow speed and small feed rate, and the deep holes are processed by pecking, and they must be driven into a section to exit chip removal. This can basically solve the problem of chip curling and chip removal, and it has been used to this day. Solid carbide drills are used on CNC machine tools. Its characteristics are: high speed, large feed rate, and chips are generated in an instant. It is required to remove chips quickly, timely and smoothly, especially when cutting steel materials. The cutting force is large, A large amount of cutting heat is generated. In addition t...

AI Technical Summary

Problems solved by technology

At the same time, the cutting steel parts should form curling chips, otherwise the cutting will be wound on the tool handle and tool of the machine tool, which will affect the next step of processing

In addition, the curly cutting must be able to break naturally under the length control requirements, otherwise, the chips are too long, increasing the friction with the inner wall of the hole, increasing the resistance, forming chip blocking, and forming extrusion piles with the chips formed at the moment of cutting, causing blockage The cutting tool is broken and broken; if the chip volume radius is too small, which greatly exceeds the yield strength of its material, it will cause cutting force, excessive cutting heat, and premature cutting curl and bending, breaking, which is also unfavorable for chip removal

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