Wave-edge rough milling cutter for machining cast iron scroll plate

Abstract

The invention provides a wave-edge rough milling cutter for machining a cast iron scroll plate. The wave-edge rough milling cutter improves the cutting efficiency and the durability of a cutter and prolongs the service life of the cutter. A transition neck part is used for connecting a cutter clamping handle part with a cutting edge part. The wave-edge rough milling cutter is characterized in thatthe cutter clamping handle part is a cylindrical straight handle; the cutting edge part comprises a plurality of cutting edges and chip grooves, the cutting edges and the chip grooves are spirally arranged, the N cutting edges are annularly distributed on the outer circumference of the cutting tool part in the cross section state, N is a natural number larger than or equal to 3, the chip groovesare located in corresponding interval areas of the circumferential face formed after the adjacent cutting edges are combined, chip breaker grooves and chip containing grooves are formed in the chip grooves, the chip containing grooves are provided with groove bottom faces and cutter outlet faces, each cutting edge is composed of an end edge, a peripheral edge and a cutter point R angle used for connecting the end edge and the peripheral edge, the front end of each end edge and the front end of each peripheral edge are respectively provided with a front cutter face and a straight rear cutter face, and sine-wave-shaped arc teeth are arranged on each peripheral edge.

Description

technical field [0001] The invention relates to the technical field of milling cutter structures, in particular to a rough milling cutter with wave blades for machining cast iron scroll disks. Background technique [0002] As a new type of fluid machinery, scroll compressors have been widely used in the fields of air-conditioning and refrigeration, gas compression, engine boosting, and vacuum pumps due to their advantages such as compact structure, high-efficiency operation, and low noise and stability. As the core part of the scroll compressor, the scroll disk directly affects the working performance of the scroll compressor with its machining accuracy. At present, the workpiece materials of scroll discs are mainly alloy cast iron and aluminum alloy. Due to their material performance characteristics, the cutting process is poor. At the same time, the complex surface structure of the scroll is also an important factor affecting its cutting quality and precision. [0003] T...

AI Technical Summary

Problems solved by technology

Due to the deep pre-casting groove of the turbine disk blank, it is necessary to choose a milling cutter with a relatively large length and diameter, and the tool cutting is mostly full cutting; when the milling cutter rotates and cuts along the vortex path, the end edge and peripheral edge of the milling cutter need to be cut. At the same time, the two sides of the scroll and the bottom of the groove are processed, so the forward and reverse milling are alternately performed when the milling cutter is cutting; at the same time, the cutter is often caused by factors such as mechanical shock, cutting vibration, and uneven cutting force. Edge chipping and breakage, tool breakage, etc. In addition, due to the elastic-plastic deformation of the cutting layer metal, the friction between the tool and the workpiece and chips is relatively high, and the cutting temperature is high, resulting in built-up edge, Phenomena such as bond breakage, thus affecting tool life

[0004] For the processing of cast iron scroll, due to its material alloy elements are more (such as: chromium ≤ 0.25%, nickel ≤ 3%), so the hardness of the workpiece is relatively high (HB201 ~ 255), and according to the process characteristics of full cutting , Conventional milling cutter processing, the cutting difficulty is high, the tool wear is serious, and the tool life is insufficient

Therefore, it is necessary to design a wave edge rough milling cutter for machining cast iron scrolls to solve the problems of tool cutting vibration and large impact load, so as to improve cutting efficiency and prolong tool life

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