A method for predicting machining accuracy of CNC milling and boring machine based on thermal analysis
A technology of machining accuracy and prediction method, used in metal processing equipment, metal processing mechanical parts, manufacturing tools, etc., can solve the problem of inability to effectively analyze the influence of thermal deformation boring and milling machine machining accuracy, achieve good machining accuracy prediction indicators, reduce The effect of difficulty and high reference value
Active Publication Date: 2021-09-28
ANHUI JIANGJI HEAVY DUTY CNC MACHINE TOOL
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[0004] In order to overcome the problem that the prior art cannot effectively analyze the influence of thermal deformation on the machining accuracy of boring and milling machines, the present invention provides a method for predicting the machining accuracy of CNC milling and boring machines based on thermal analysis. The calorific value of the thermal unit is analyzed by the improved neural recognition network algorithm to estimate the impact on the processing accuracy
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Embodiment 1
[0070] like figure 1 As shown, this implementation provides a method for predicting machining accuracy of CNC milling and boring machine based on thermal analysis, which includes the following process:
[0071] 1. Data collection
[0072] The characteristic quantity used to calculate the numerical value of the thermal characteristic of the CNC milling and boring machine is collected in real time, and the characteristic data set of the thermal characteristic is obtained.
[0073] The characteristic quantities of thermal characteristic values include: bearing speed n1, rolling bearing friction torque M1, ball screw speed n2, screw nut friction torque M2; drive motor output torque Mm, drive motor speed n3, oil dynamic viscosity μ and The supporting area A of the sealing belt part; the sampling frequency for real-time collection of feature quantities is 5Hz.
[0074] Calculate the heat production value Q of the rolling bearing of the machine tool according to the thermal chara...
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The invention relates to the field of precision machining control of numerically controlled machine tools, in particular to a method for predicting the machining accuracy of numerically controlled milling and boring machines based on thermal analysis. The method includes the following steps: S1. In the process of processing, collect feature quantities in real time to obtain a thermal characteristic feature data set; S2. Calculate the calorific value of the rolling bearing, the calorific value of the ball screw, The calorific value of the motor and the calorific value of the oil film of the static pressure guide rail are used to obtain the heat source attribute data set; S3. Use the fast search and density peak algorithm to cluster the heat source attribute data set; S4. Use the extension neural network algorithm to analyze the data set. Training, S5. Continue to collect the thermal characteristic attribute value of the CNC milling and boring machine, and calculate the heat source attribute data set; S6. Use the extension neural network algorithm after the training is completed to obtain the influence of the heat production of the CNC milling and boring machine on the machining accuracy in the current state. state data; S7, estimate the machining accuracy according to the state data of the whole process.
Description
technical field [0001] The invention relates to the field of precision machining control of numerical control machine tools, in particular to a method for predicting the machining accuracy of numerical control milling and boring machines based on thermal analysis. Background technique [0002] CNC machine tool is a kind of high-end precision processing equipment. CNC machine tool solves the problem of complex, precise, small batch and multi-variety parts processing. It is a flexible and high-efficiency automatic machine tool, which represents the modern machine tool control technology. The development direction is a typical mechatronics product. CNC machine tools are the jewel in the crown of the modern mechanical processing industry. In the field of high-end precision machine tools, advanced companies from Japan and Germany have firmly occupied the market. Among them, the machining accuracy of machine tools is an important technical indicator to measure the level of CNC ma...
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IPC IPC(8): B23P23/02B23Q17/00
CPCB23P23/02B23Q17/00
Inventor 司文峰
Owner ANHUI JIANGJI HEAVY DUTY CNC MACHINE TOOL