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Adaptive adjustment method of spindle rotation speed for chatter-free high-efficiency milling

A technology of self-adaptive adjustment and spindle speed, applied in automatic control devices, measuring/indicating equipment, feeding devices, etc., can solve problems such as increasing processing costs

Active Publication Date: 2020-09-04
XI AN JIAOTONG UNIV
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Problems solved by technology

To sum up, most of the existing chatter suppression strategies require additional auxiliary devices, which are difficult to implement under complex processing conditions at the enterprise site, and also increase the processing cost

Method used

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  • Adaptive adjustment method of spindle rotation speed for chatter-free high-efficiency milling
  • Adaptive adjustment method of spindle rotation speed for chatter-free high-efficiency milling
  • Adaptive adjustment method of spindle rotation speed for chatter-free high-efficiency milling

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Embodiment Construction

[0082] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0083] A method for adaptively adjusting spindle speed for high-efficiency milling without chatter, comprising the following steps:

[0084] Step 1) Refer to figure 1 , Build a milling chatter spindle speed adaptive adjustment system, build and connect hardware, develop software programs, and prepare for processing;

[0085] 1.1) Build and connect hardware:

[0086] (1) CNC machine tool: Due to the need for real-time communication with external data, the CNC system of the CNC machine tool needs to have an open function, be able to provide an I / O interface for data exchange with external data acquisition equipment, and be able to realize the secondary of the dynamic link library Development to implement calls to external data;

[0087] (2) Vibration acceleration sensor: Paste the vibration acceleration sensor on the spindle head of the machine tool,...

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Abstract

The invention relates to an adaptive adjustment method of spindle rotation speed for chatter-free high-efficiency milling. Firstly an adaptive adjustment system of spindle rotation speed for chatter milling is built; in the milling process of a machine tool, the vibration acceleration data of a spindle head is acquired, extracted and spliced dynamically, frequency domain transformation calculationis carried out on the spliced vibration acceleration data to obtain an energy spectrum of the spindle head, and the milling chatter is judged by comparing the energy spectrum characteristic frequencyenergy ratio with a threshold value; in the milling chatter state, in combination with the quantization relationship between the natural frequency of a cutter system and the optimal rotation speed ofthe stability domain, the spindle rotation speed is adaptively and directionally adjusted, the feed rate is changed synchronously, and the active suppression of the milling chatter is realized; and in the milling chatter-free state, the spindle rotation speed is adjusted adaptively, synergistically and directionally by gradually increasing the spindle rotation speed in a determined range, and themilling machining efficiency is improved. The method is simple and convenient to implement and convenient to use in the enterprise processing site.

Description

technical field [0001] The invention belongs to the technical field of high-precision and high-efficiency numerical control milling, and in particular relates to an adaptive adjustment method of spindle speed for high-efficiency milling without chatter. Background technique [0002] High-efficiency and high-precision milling is the eternal goal pursued in the manufacturing process of parts. Chatter vibration in the milling process is one of the main unfavorable factors restricting the further improvement of machining efficiency and precision. Chatter is a self-excited vibration due to the dynamic interaction between the tool and the workpiece. Unless this vibration can be avoided, it will lead to poor surface quality and low machining accuracy. In severe cases, it will damage the tool or machine tool. In fact, in order to obtain good processing quality and high processing efficiency, the milling process must be carried out without chatter, and the processing parameters shoul...

Claims

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Application Information

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IPC IPC(8): B23Q17/09B23Q15/08
CPCB23Q15/08B23Q17/09B23Q17/0971
Inventor 张星陈昆弘闫文彪赵万华尹佳
Owner XI AN JIAOTONG UNIV
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