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Low-vibration titanium alloy milling process parameter optimization method

A technology of process parameters, titanium alloy, applied in the direction of instruments, computer control, simulators, etc., can solve the problem of not fully considering the resonance and chatter of machine tool milling, affecting the processing quality, efficiency and tool life, etc., to suppress milling chatter. , The effect of suppressing milling vibration and ensuring milling efficiency

Active Publication Date: 2019-06-18
XIAN AIRCRAFT IND GROUP
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AI Technical Summary

Problems solved by technology

[0005] The main disadvantage of the existing optimization methods of titanium alloy milling process parameters is that the milling resonance and chatter that may be caused by the dynamic stiffness of the machine tool are not fully considered, which ultimately affects the processing quality, efficiency and tool life.

Method used

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  • Low-vibration titanium alloy milling process parameter optimization method

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Embodiment 1

[0042] Example 1: The present invention is used to optimize the process parameters in the rough machining stage of titanium alloy TC18 milling.

[0043] (1) Refer to the appendix figure 1 , according to the geometric characteristics of the box-shaped parts being processed, that is, the minimum value of the corner radius R min = 11mm and the minimum size of the slot L min =210mm, use the following formula to calculate the maximum diameter D of the allowable tool max :

[0044] D max =min{5R min ,0.3L min}=min{5×11,0.3×210}=55;

[0045] (2) The diameters of the existing milling cutters are 30mm, 35mm, 40mm, 50mm, and 80mm, respectively. max closest to but less than D max The cutter is used as a titanium alloy milling cutter, so choose an indexable milling cutter with a diameter of D=50mm (model: 7792VXD12-A050Z6R);

[0046] (3) The minimum cutting speed V of the tool recommended by the tool manufacturer c,min =30m / min and maximum cutting speed V c,max =45m / min, calcul...

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Abstract

The invention discloses a low-vibration titanium alloy milling process parameter optimization method. According to the method, a titanium alloy cutting rotation speed range is determined on the basisof a recommended titanium alloy cutting speed, and therefore, it can be ensured that a cutter works at a reasonable speed; the cutting time of each blade and a workpiec is controlled, and a radial cutting depth is determined, and therefore, it can be ensured that the cutter has a certain service life; an axial cutting depth is determined through a milling stability lobe diagram, so that possible vibration during a milling process can be avoided; the low-order natural frequency of a machine tool spindle is measured, and a spindle rotation frequency which is far away from the natural frequency of the machine tool spindle, and a cutter tooth cutting frequency are selected, a spindle speed is determined, so that possible resonance during the milling process can be avoided; and a feed rate is determined according to chip shapes generated in actual milling.

Description

technical field [0001] The invention relates to a method for optimizing process parameters for low-vibration milling, in particular to a method for optimizing process parameters for low-vibration milling of titanium alloys. Background technique [0002] Titanium alloy parts are widely used in aerospace vehicles, and these parts are mostly processed by milling. Since titanium alloy is a typical difficult-to-machine material, its milling efficiency is low and the tool wear is serious. During the cutting process, large cutting force, large cutting heat, and large vibration are the reasons for low processing efficiency and serious tool wear. The high quality, high efficiency and long tool life of titanium alloy milling are directly related to process parameters, so it is very important to develop a method for optimizing process parameters that takes into account wear and milling efficiency. [0003] Patent 1 "Process parameter optimization method for titanium alloy CNC milling...

Claims

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Application Information

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IPC IPC(8): G05B19/408
Inventor 惠昕贾保国杨昀范迎九
Owner XIAN AIRCRAFT IND GROUP
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