Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Soft measurement method and system of tool nose point displacement mobility of machining center

A technology of displacement admittance and machining center, which is used in measuring devices, measuring mechanical impedance, measuring ultrasonic/sonic/infrasonic waves, etc., and can solve the problem of difficult and accurate implementation of rotation angles.

Inactive Publication Date: 2013-07-24
NORTHEASTERN UNIV
View PDF1 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the traditional response coupling method needs to measure the frequency response function of tool holder rotation angle-bending moment, it is difficult to accurately implement the measurement of rotation angle and the application of bending moment in engineering applications.
Therefore, there is no applicable method to theoretically predict the frequency response function of the tool tip of the machining center.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Soft measurement method and system of tool nose point displacement mobility of machining center
  • Soft measurement method and system of tool nose point displacement mobility of machining center
  • Soft measurement method and system of tool nose point displacement mobility of machining center

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0065] In this embodiment, the soft measuring system of the tool tip point displacement admittance of the machining center includes a tool, a test rod 7, an acceleration sensor 9, a force hammer 8, a data acquisition card 10 and a computer 11;

[0066] The test rod 7 or the tool is installed on the tool handle 4 of the machining center, the tool handle 4 is installed on the spindle 3 of the machining center, the acceleration sensor 9 is pasted on the end side of the test rod 7 or the end side of the tool, the signal output terminal of the force hammer 8, the acceleration The output terminals of the sensors 9 are all connected to the computer 11 through the data acquisition card 10 .

[0067] The force hammer 8 is used to excite the front end of the tool or the front end of the test rod 7 .

[0068] Test rod 7 is a standard shor...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a soft measurement method and a soft measurement system of tool nose point displacement mobility of a machining center, and belongs to the technical field of vibration measurement. Experimentation testing is combined with finite element analysis to conduct the soft measurement of the tool nose point displacement mobility on tools which are arranged in the machining center and have different geometrical characteristics. According to the soft measurement method and the soft measurement system of the tool nose point displacement mobility of the machining center, direct testing of p2b2b and n2b2b is avoided, instead, the p2b2b and the n2b2b are solved through testing of H11 and H12, H11 and H12 are values which are easier to test, times of experimental tests are reduced, the tool nose point displacement mobility of all tools in a machining center tool magazine can be theoretically forecasted through a plurality of times of tests after the tools are installed, the test cost and test expenses are greatly reduced, no accurate modeling needs to be conducted on main shaft-tool handle, forecasted result incredibility caused by errors in a modeling process and errors in a parameter identification process is avoided, and maneuverability is strong when the soft measurement method and the soft measurement system of the tool nose point displacement mobility of the machining center are applied to engineering. According to the soft measurement method and the soft measurement system of the tool nose point displacement mobility of the machining center, a plurality of times of theoretical prediction can be conducted after one test, obtained tool nose point displacement mobility is the basis for forecasting flutter, and milling machining flutter forecasting can be conducted.

Description

technical field [0001] The invention belongs to the technical field of vibration testing, and in particular relates to a soft measuring method and system for the displacement admittance of a tool tip point of a machining center. Background technique [0002] With the wide application of high-speed machining technology in aviation, automobile, and mold fields, the requirements for machining efficiency and metal removal rate in machining are getting higher and higher. However, in high-speed machining, the regenerative chatter of the machine tool will cause the vibration of the tool, seriously affect the processing quality and tool life, and limit the increase of the spindle speed. Theoretical prediction of chatter and the use of safe and reliable processing parameters for processing are of great significance. Current research shows that the occurrence of chatter is related to the frequency response function of the tool nose point and the spindle speed. [0003] The amplitude...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01H15/00
Inventor 刘宇张义民李常有朱丽莎
Owner NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products