Tool and method for machining shaft head hole of machine frame

Abstract

The invention provides a cutter for machining shaft head holes of a machine frame. The cutter is installed on a boring bar of a main shaft of a numerical horizontal floor type boring and milling machine. The cutter comprises a cutter body and a plurality of blades fixed to the periphery of the cutter body and evenly distributed on the periphery of the cutter body. The tool cutting edge angle a of each blade is 90 degrees, the axle positive rake angle yp is +7 degrees, the radial positive rake angle yf is +5 degrees, the length b of an axial protrusion of a cutting edge of each blade is 2.8mm, the width d of the axially protruded cutting edge is 3.2mm, and the highest point of a cutter bit is higher than the cutter body by c which is equal to 3mm. According to the method for machining the shaft head holes of the machine frame, the same cutter is used, the rough milling process and the finish milling process of all shaft head holes in the machine frame are automatically accomplished according to a numerical procedure order in the mode of spiral interpolation milling in three-shaft linkage and in the mode of arc interpolation milling in two-shaft linkage. A traditional complex machining method is replaced by the method for machining the shaft head holes of the machine frame and the method has the advantages of being safe, high in efficiency, easy to operate, capable of enabling automatic and continuous machining to be achieved, effectively shortening the machining period, guaranteeing the machining quality and avoiding the potential safety hazards and relieving the labor intensity of workers, and particularly suitable for machining shaft head holes of large-scale box body parts.

Description

technical field [0001] The invention relates to a metal cutting tool and a processing method, in particular to a tool and a method for processing a shaft head hole of a machine frame, and belongs to the technical field of mechanical processing. Background technique [0002] The frame is one of the important parts of the high-power low-speed marine diesel engine, please refer to figure 1 , not only the outer walls of the front and rear ends of the frame are provided with a plurality of outer gear shaft holes 4, but also a plurality of inner gear shaft head holes 1 are arranged on the inner wall. These shaft head holes are not only numerous in number and staggered in position, but also have a complex. The traditional processing method is: processing on a large horizontal boring machine, firstly drill a hole in the center of the shaft head hole bottom, and then perform two-step rough milling, the first step uses a smaller diameter milling cutter to remove part of the allowance...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the defects of the processing method and equipment of the existing high-power low-speed marine diesel engine frame, to provide a tool and method for processing the shaft head hole of the frame, to realize one tool with multiple functions and avoid tool change and rough and fine continuous processing to simplify the process, improve work efficiency, reduce costs, and ensure safety and quality

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