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Cutter tip frequency-response function predicting method based on accurate milling cutter modeling

A technology of frequency response function and prediction method, applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing, etc.

Inactive Publication Date: 2015-11-18
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies of the existing technology, the purpose of the patent of the present invention is to provide a method for predicting the frequency response function of the cutting edge point based on the precise modeling of the milling cutter, so as to solve the problem of accurately modeling the milling cutter and accurately predicting the frequency response function of the cutting edge point

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  • Cutter tip frequency-response function predicting method based on accurate milling cutter modeling
  • Cutter tip frequency-response function predicting method based on accurate milling cutter modeling
  • Cutter tip frequency-response function predicting method based on accurate milling cutter modeling

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specific Embodiment approach

[0107] The specific implementation of the patent of the present invention is as follows:

[0108] The purpose of the patent of the present invention is to provide a method for predicting the frequency response function of the cutting edge point based on the precise modeling of the milling cutter, so as to solve the problem of accurately modeling the milling cutter and accurately predicting the frequency response function of the cutting edge point. The specific steps are as follows.

[0109] Step 1: Iffigure 1 As shown, one end of the milling cutter is installed in the tool holder, and the tapered end of the tool holder is installed in the machine tool-spindle matched with the taper at the end of the tool holder, thus forming the machine tool-spindle-tool holder-milling cutter system.

[0110] Step 2: If figure 1 As shown, the machine tool-spindle-tool holder-milling cutter system is divided into four parts: machine tool-spindle-tool holder-partial tool holder, remaining tool ...

Embodiment 1

[0191] Embodiment 1: The milling cutter T1 has a diameter of 10mm and a total length of 95mm, and the material is high-speed steel. The distance between points 7 and 8 is 20mm.

[0192] According to the above steps, the predicted value and the measured value of the frequency response function of the cutter point of the milling cutter T1 are obtained. Such as figure 1 Shown, and get the predicted value and measured value of the natural frequency of T1 milling cutter, as shown in Table 1.

[0193] Table 1 Comparison of predicted and measured natural frequencies of T1 milling cutters

[0194]

Embodiment 2

[0195] Embodiment 2: milling cutter T2, a 2-flute milling cutter with a diameter of 10mm and a total length of 100mm, and the material is cemented carbide. The distance between points 7 and 8 is 25mm.

[0196] According to the above steps, the predicted value and the measured value of the frequency response function of the cutter tip point of the milling cutter T2 are obtained. Such as figure 1 Shown, and get the predicted value and measured value of the natural frequency of T2 milling cutter, as shown in Table 2.

[0197] Table 2 Comparison of the predicted value and the measured value of the natural frequency of T2 milling cutter

[0198]

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Abstract

The invention discloses a cutter tip frequency-response function predicting method based on accurate milling cutter modeling. The method includes the steps of dividing a machine tool, a main shaft, a cutter handle and a milling cutter into the machine tool, the main shaft, the cutter handle, a first cutter rod body, a second cutter rod body, a milling cutter transition section and cutter teeth, dividing the milling cuter into a symmetrical milling cutter part and an asymmetrical milling cutter part according to actual conditions considering the actual milling cutter modeling, calculating the cross sectional inertia moment of each part of the milling cutter in detail with the two-blade milling cutter body and the four-blade milling cutter body as examples, and putting forward a universal modeling method of the milling cutter transition section so that the prediction accuracy of a cutter tip frequency-response function can be improved. The purpose of accurately predicting the cutter tip frequency-response function during accurate milling cutter modeling is achieved.

Description

technical field [0001] The invention belongs to the technical field of vibration testing, and in particular relates to a method for predicting a frequency response function of a cutting edge point based on precise modeling of a milling cutter. Background technique [0002] The cutting chatter of the machine tool will reduce the surface quality of the machined workpiece and affect the service life of the machine tool. At present, the most effective way to avoid cutting chatter is to select stable cutting parameters through the stability lobe diagram of the machining system. The stability lobe diagram is calculated from the frequency response function of the tool tip point in the machining system. The tool tip point frequency response function can be determined through the experimental modal test, but repeated modal tests caused by frequent replacement of milling cutters in actual processing not only consume , and human error will be introduced. In response to this problem, ...

Claims

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Application Information

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IPC IPC(8): B23Q17/09
CPCB23Q17/0904B23Q2717/006
Inventor 朱坚民何丹丹杨攀潘贺丰赵全龙谢平赵展
Owner UNIV OF SHANGHAI FOR SCI & TECH
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