A kind of indexable blade and its tool holder

Abstract

The invention discloses an indexable blade and a cutter bar. The indexable blade is in a basic shape capable of being projected into a regular triangle in a plane, wherein three corners form cutting heads respectively; a vertex angle of each cutting head is a 35-degree acute angle; cutting edges are formed between the adjacent cutting heads; each cutting edge is an inward recessed V shape along the edge of the regular triangle, and is intersected with the side edge of a circle concentric with an inscribed circle of the regular triangle; the radius of the concentric circle is less than that of the inscribed circle of the regular triangle, and greater than two thirds of the radius of the inscribed circle of the regular triangle; circular arc bulges are arranged in the middles of the cutting edges of the blade, and clamped with side supporting surfaces correspondingly arranged at a mounting seat of the cutter bar; and the indexable blade can be fastened on the mounting seat by a clamping device. With the adoption of the structure, the positioning accuracy and the clamping strength of the blade are improved; cutter head displacement due to too great cutting force is avoided; and the indexable blade has the characteristics of high economic performance, high strength and high machining precision.

Description

technical field [0001] The invention relates to the field of metal cutting tools, in particular to a 35° indexable insert capable of using three apex angles, and a tool holder capable of maintaining high tool tip position accuracy when dealing with cutting resistance. Background technique [0002] In general turning processing, the 35° diamond-shaped indexable insert has a sharper tip and a wide processing space, and is mostly used for cylindrical processing, profiling processing, end face processing, etc., and is widely used. figure 1 It is a structural schematic diagram of a 35° rhombic blade with two cutting heads in the prior art, figure 2 It is a schematic diagram of the three-dimensional structure of a 35° rhombic blade with two cutting heads in the prior art, such as figure 1 , figure 2 As shown, the rhombic insert 100 has two cutting heads 101 with a sharp angle of 35°. [0003] In the prior art, the diamond-shaped blade 100 can only use two vertices, which is l...

AI Technical Summary

Problems solved by technology

However, due to the setting of concave and convex grooves, the cutting depth of the blade has a certain range limit, and the general cutting depth is only 2.5mm

And according to the 35° rhombic blade designed according to the patent, the scope of use is limited

Therefore, compared with the general diamond-shaped blade, the machining range is greatly limited

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