Experiment method for testing abrasion difference among left tool face, right tool face and rear tool face of tool

An experimental method and flank technology, applied in the direction of manufacturing tools, measuring/indicating equipment, metal processing machinery parts, etc., can solve the problems of tool overuse, tool waste, etc., and achieve the goal of saving process costs and reducing the workload of experimental testing Effect

Inactive Publication Date: 2016-07-06
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the results of the existing tool flank wear difference method will lead to ...

Method used

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  • Experiment method for testing abrasion difference among left tool face, right tool face and rear tool face of tool
  • Experiment method for testing abrasion difference among left tool face, right tool face and rear tool face of tool
  • Experiment method for testing abrasion difference among left tool face, right tool face and rear tool face of tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Implementation example 1: Construction of force model of left and right cutting edges and experimental tool design

[0037] (1) In the process of machining large-pitch threads by using the axial layered cutting method, the chip movement directions on the rake face of the left and right cutting edges are different, the feeding direction of the left cutting edge is opposite to the direction of the normal vector of the machined surface, and the feeding direction of the right cutting edge The direction is the same as the normal vector direction of the machined surface, resulting in significantly different forces, such as figure 1 , figure 2 shown;

[0038] In the picture: v c is the cutting speed, v f is the axial feed speed of the tool, θ is the helix angle of the thread, a c is the cutting thickness, v 1 is the total moving speed of the left cutting edge relative to the thread surface, F x1 is the resultant force on the left cutting edge in the horizontal direction...

Embodiment 2

[0050] Implementation example 2: Experimental method of tool flank wear

[0051] (1) In order to reveal the difference in the wear of the left and right flanks of the tool under different working conditions, the two turning tools in Table 1 were used in the experiment to cut the 35CrMo specimen under dry cutting and lubrication conditions, and the specimens in the two turning experiments were all It is a right-hand thread with a pitch of 16mm, the number of starts is 1, the tooth angle is 26°, the helix angle is 2°36', the thread processing length is 160mm, the outer diameter is 120mm, and the inner diameter is 104mm;

[0052] (2) The experiment adopts the method of cutting layer by layer along one side of the tool along the axial direction, and keeps the radial cutting depth of the tool consistent with the groove depth of the trapezoidal external thread. The feed rate of the left and right layered turning in the two experiments is 0.05mm, and the speed is 10rpm; among them, t...

Embodiment 3

[0059] Implementation example 3: Differences in the wear width of the left and right flanks of the tool

[0060] (1) Cutting experiments were carried out using the experimental scheme of tool 1 in Table 2. The cutting times and cutting strokes of the left and right cutting edges are shown in Table 3 for each tool wear measurement;

[0061] Table 3 Cutting stroke of left and right cutting edges of tool 1

[0062]

[0063] (2) Obtain the change characteristics of the flank wear width with the cutting stroke at different distances from the tool nose, such as Figure 4 , Figure 5 shown;

[0064] (3) by image 3 It can be seen that as the cutting stroke increases, there is a significant difference in the wear width of the left and right flanks of tool 1; at the same time, it is found that in the initial wear stage, the wear width of the left and right flanks is similar to the change in the cutting stroke, but there is a difference along the direction of the cutting edge; In...

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Abstract

The invention discloses an experiment method for testing the abrasion difference among a left tool face, a right tool face and a rear tool face of a tool, in particular to the method for detecting the abrasion difference among the left tool face, the right tool face and the rear tool face of the tool. The method aims at solving the problem that according to a result measured through an existing method for the abrasion difference of a rear tool face of the tool, the tool will be used beyond the service life or the tool is wasted. The method includes the steps that firstly, a stress model of a left cutting edge and a right cutting edge of the tool is established; secondly, recognition of the abrasion difference of the left tool face, the right tool face and the rear tool face is conducted; and thirdly, a turning tool abrasion testing scheme is designed, and the abrasion difference of the left tool face, the right tool face and the rear tool face of the tool is detected through a tool cutting experiment. The influences of the tool clearance, the cutting edge radius and the cutting lubricating conditions on the abrasion difference of the left tool face, the right tool face and the rear tool face of the tool are detected through the method, the service life of the tool under different conditions can be accurately evaluated, and an effective evaluation means is provided for optimal design of a tool and a technology for efficiently and accurately turning large-pitch threads.

Description

technical field [0001] The invention relates to an experimental method for testing the wear difference of the left and right flanks of a tool. Background technique [0002] In the existing large-pitch thread turning technology and tools, for the convenience of tool positioning and NC machining programming, the same tool is usually used to process the left and right thread surfaces. The tool adopts a symmetrical structure with left and right cutting edges. The force composition of the flank is different, resulting in the wear condition of the left flank of the tool is much more severe than that of the right flank of the tool; at the same time, when turning a large pitch thread, due to the slow rotation speed of the workpiece, the lengthening of the wear zone of the tool, and the increased load , leading to a large increase in the unevenness of the flank wear zone of the tool, and a further increase in the difference in the flank wear of the left and right cutting edges of the...

Claims

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Application Information

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IPC IPC(8): B23Q17/09
CPCB23Q17/0995
Inventor 姜彬谷云鹏闫东平郑敏利
Owner HARBIN UNIV OF SCI & TECH
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