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

Active control method and system for milling chattering time delay of motorized spindle

A technology of active control and milling chatter, applied in the direction of manufacturing tools, large fixed members, complex mathematical operations, etc., can solve the problems of increasing the difficulty of control algorithm design and complex milling dynamic system

Active Publication Date: 2016-07-13
XI AN JIAOTONG UNIV
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mathematical modeling of the milling system, experimental determination of the dynamic parameters of the system, and then design of the control algorithm are the core of the active control of chatter; however, the milling dynamics system is relatively complex, and the complexity of the milling process is not only due to the time delay in the system Existence is also due to the periodicity of the rotary cutting motion of the cutter teeth during the milling process, which leads to periodic changes in the coefficients in the milling dynamics equation, which increases the difficulty of the design of the control algorithm
Therefore, the design of active chatter control methods in milling is very challenging

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
  • Active control method and system for milling chattering time delay of motorized spindle
  • Active control method and system for milling chattering time delay of motorized spindle
  • Active control method and system for milling chattering time delay of motorized spindle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0062] In order to suppress the vibration of the electric spindle during high-speed milling and improve the precision and efficiency of milling, in one embodiment, as figure 1 As shown, the present disclosure discloses a method for active control of chatter delay in electric spindle milling, and the method includes the following steps:

[0063] S100, establishing a continuous milling chatter active control state equation;

[0064] S200, converting the continuous milling chatter active control state equation into a discrete control system state equation;

[0065] S300. Using a discrete optimal control algorithm to calculate the state equation of the discrete control system to obtain an optimal active control force;

[0066] S400. According to the piezoelectric actuator driving voltage-output force model, use the calculated optimal active control force to calculate the driving voltage required by the piezoelectric actuator, and then drive the piezoelectric actuator to apply act...

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 relates to an active control method and system for milling chattering time delay of a motorized spindle. The method and the system are applied to the motorized spindle comprising an actuating device. The method comprises the steps: inputting vibrating signals acquired from mutually-orthogonal directions of a motorized spindle system, measured motorized spindle system parameters and a cutting force coefficient to a continuous-milling chattering active control state equation containing state time delay; carrying out discretization on the continuous-milling chattering active control state equation, then, calculating optimal active control force for the motorized spindle system by using a discrete optimal control algorithm, and then obtaining a driving voltage which drives a piezoelectric actuator to apply the active control force to the motorized spindle system. By adopting the method or the system provided by the invention, the chattering during milling can be effectively inhibited, a stable region of milling is enlarged, the machining effect is improved, and the machining efficiency is increased.

Description

technical field [0001] The present disclosure belongs to the technical field of mechanical cutting processing control, and more particularly relates to an active control method and system for chatter time delay in milling processing. Background technique [0002] Milling is widely used in aviation, aerospace, mold and other industries. In milling, chatter is a key factor restricting the quality of machined surfaces and productivity. Chatter is a dynamic instability phenomenon of the closed-loop cutting system composed of machine tool-tool-workpiece. It is rooted in the abnormal change of cutting force, resulting in very strong and continuous relative vibration between the tool and the workpiece. Chatter is a self-excited vibration phenomenon in cutting machining, among which regenerative chatter (self-excited chatter excited by dynamic milling force caused by the change of milling thickness) is the main factor causing vibration. Cutting chatter will leave chatter marks on ...

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): B23B19/02G06F17/11G06F17/16
CPCG06F17/11G06F17/16B23Q1/70
Inventor 陈雪峰高家伟张兴武刘金鑫
Owner XI AN JIAOTONG 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