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Method for measuring load distribution of each part of micro drill

A technology of load distribution and various parts, applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc., can solve the problems of increasing workpiece surface burrs, unfavorable cutting process forming, etc., to improve cutting performance and improve drilling. Process quality, effects of optimizing process parameters and geometry

Active Publication Date: 2021-04-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the radius of the cutting edge increases due to tool wear, the plowing force also increases, and a large amount of elastic deformation will increase the burrs on the surface of the workpiece, which is not conducive to the forming of the cutting process

Method used

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  • Method for measuring load distribution of each part of micro drill
  • Method for measuring load distribution of each part of micro drill
  • Method for measuring load distribution of each part of micro drill

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Embodiment Construction

[0051] In order to better explain the problem solved by the present invention, the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0052] Such as figure 1 As shown, the drilling dynamometer system of the present invention includes: a vertical machine tool spindle 1, a tool holder 2, a micro drill bit 3 with a diameter of 1 mm, a workpiece 4 with a thickness of 2 mm, a tooling 5, a Kistler 9257B dynamometer 6, and a fixed dynamometer The awl 7, machine tool workbench 8, data collector 9, PC machine 10, frock base 11, hexagonal bolt 12.

[0053] The micro-drilling tool used in this example is a straight-shank double-edged general-purpose drill, and the tool parameters are shown in Table 1. Prepare a total of six knives, divided into three groups A, B, and C, with two knives in each group, numbered A 1 、A 2 , B 1 , B 2 、C 1 、C 2 . Set the spindle speed n of the machine tool as 6000r / min, and in the three expe...

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Abstract

The invention relates to a method for measuring load distribution of each part of a micro drill, and belongs to the field of cutting force measurement in drilling machining. The method comprises the steps that firstly, experimental drilling tools are divided into two types, one type is an intact tool, the other type is a tool with a main cutting edge ground off, and the grinding thickness is not smaller than the feeding amount of each turn of the main cutting edge; secondly, a drilling force measuring system is built, and corrected; thirdly, axial thrust of the two types of drilling tools is measured, load distribution of a drill tip is calculated, and the influence degree of the feeding amount on all parts of the drill tip is analyzed and used for improving technological parameters; fourthly, the axial thrust of the two types of drilling tools in the abrasion state is measured, and load distribution is calculated according to the method in the third step; and fifthly, ploughing load distribution and proportions of the two types of drilling tools in a wear state are calculated so as to analyze the influence of the wear degree of the tools on the quality of the drilling process and solutions needing to be taken.

Description

technical field [0001] The invention relates to a method for measuring the load distribution of each part of a micro-drill, which belongs to the field of cutting force measurement in drilling processing. Background technique [0002] The cutting edge of the traditional drilling tool is a tiny arc edge, which is often ignored during the cutting process, while the drilling size of the micro-drilling tool is at the millimeter or even micron level, which makes the tool miniaturized, especially after the tool is continuously processed. Wear increases the radius of the rounded edge, so the rounded edge configuration should be considered. [0003] The traditional drilling force measurement is the total thrust measurement of the entire tool, which is the superposition of axial cutting force and plowing force. The tool is divided into a main cutting edge and a chisel edge, and the thrust of each part cannot be measured, let alone the plowing force of the two parts, and it is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/00
CPCB23Q17/00
Inventor 冯睽睽张发平王武宏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY