Cut-off tool and method for machining end-face circular deep groove

Abstract

The invention provides a cut-off tool and method for machining an end-face circular deep groove. The cut-off tool comprises a tool handle and a tool edge, wherein the tool edge is provided with a rake angle, a clearance angle and a chip breaker groove; two side surfaces of the tool edge are in a circular arc shape; the radius of the circular arc at the outer side of the tool edge is smaller than the outer diameter of the end-face circular deep groove; and the radius of the circular arc at the inner side of the tool edge is greater than the inner diameter of the end-face circular deep groove. The machining method of the end-face circular deep groove comprises the following steps: firstly roughly machining a workpiece without a groove by using a special sleeve drill bit for a planar annulargroove; and then cutting the workpiece by using the cut-off tool so as to obtain the circular deep groove with satisfying size. The invention has the following advantages: workpieces can be effectively prevented from being damaged, strength of the cut-off tool is increased, the machining method is simple and practical, has high production efficiency and high economical efficiency, and can guarantee production quality easily.

Description

technical field [0001] The invention relates to a cutting knife for machining arc-shaped deep grooves on end surfaces and a method for processing arc-shaped deep grooves on end surfaces by using the cutting knife. Background technique [0002] Such as figure 1 As shown, it is a cross-sectional view of the connecting pipe in the IGCC gasifier assembly. As an important part of the shell gasifier of Tianjin Green Coal Power IGCC gas generator set, the material is SA182F11Cl2III alloy steel. The connecting pipe serves to connect the other two The role of the connecting pipe, and the processing of the end surface groove will have a great impact on the overall quality, because it is necessary to process a groove with a width of 6mm and a depth of 65mm on the end surface of the connection section. The outer diameter is 23mm and the inner diameter is 17mm. Due to the narrow width and deep depth, it brings certain difficulties to the processing, which is difficult to solve with the ...

AI Technical Summary

Problems solved by technology

On the other hand, the thickness of the cutting tool must also be strictly controlled. In order to process this deep groove, the thickness of the cutting tool can only be controlled at about 7-8mm, while the overall thickness of the general cutting knife is about 20mm, so if you refer to the traditional cutting knife for repairing If it is ground, the blade that is too thin or too long will make the overall rigidity of the tool not enough. During the process of lathe processing, only a small amount of back cutting can be used, and the speed can only be controlled at about 60r / min, and the cutting efficiency is low. , especially when the tool is fed to a certain depth, due to the strength of the tool itself, the tool is easy to vibrate once it is stressed, and even causes the tool itself to break, so the traditional grinding method cannot be used for normal processing

Images