Numerical machine tool machining state multi-parameter online active monitoring system and implement method thereof

Abstract

The invention discloses a numerical machine tool machining state multi-parameter online active monitoring system and an implement method thereof. The system and the method mainly solve the problems that state detection performance indexes of an existing numerical control machine tool are not comprehensive, and closed-loop control during the machining process can not be achieved. The numerical machine tool machining state multi-parameter online active monitoring system comprises a first sensor assembly arranged on a numerical control machine tool servo feeding unit, a second sensor assembly arranged on a main shaft unit, a third sensor assembly disposed on a cooling liquid circulating unit and a multi-channel synchronous data collecting PXI box used for receiving information of collected data. The multi-channel synchronous data collecting PXI box sends related collected state signals to a monitoring computer in real time for analysis, calculation, display and storage, the monitoring computer generates related control instructions according to abnormal or optimized machining state parameters, transmits the related control instructions to a numerical control system of the numerical control machine tool through an Ethernet bus and executes related active control instruments, and accordingly real-time adjustment and control of numerical control machining process states are finished.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tools, and relates to a detection and control of the working state of a machine tool, in particular to a multi-parameter online active monitoring system for the processing state of a numerical control machine tool and a realization method thereof. Background technique [0002] CNC machine tool technology is developing in the direction of high automation, high integration, high flexibility and high intelligence. In order to ensure the safety of CNC machine tools, improve and improve product processing quality, and avoid various accidents caused by abnormal conditions during processing , such as: tool or abrasive damage and wear, abnormal spindle rotation, screw and bearing temperature rise, etc. will affect the machining accuracy, machine tool vibration will affect the surface quality of the workpiece or even damage the machine tool, and the unreasonable setting of the feed speed o...

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Problems solved by technology

[0010] (5) Chinese patent: CN201010595650.7, title of invention: a control method for thermal deformation compensation of ram of CNC machine tools and a device for implementing this method, and proposes a micro-displacement fixed on the ram with a low thermal expansion coefficient The detection device mainly solves the processing error problem caused by the expansion and contraction deformation of the ram of the CNC machine tool with the temperature change

[0016] The above-mentioned detection methods are mainly based on a single item or a combination of some of the detection parameters, which cannot fully realize the comprehensive index detection of the state of the CNC machining process.

Among them, the method of using optics and air flow field to detect grinding wheel wear is still difficult to meet the application requirements of harsh working conditions on the processing site in terms of accuracy and stability; the technical defect of multi-physical state detection optimization and remote comprehensive diagnosis intelligent CNC system is that the current configuration needs to be discarded It is unbearable and impractical for existing CNC machine tool users to replace various CNC systems on the original CNC machine tools with expensive newly developed intelligent CNC systems; although the digital centralized intelligent monitoring system of machine tools can pass It is difficult to achieve the strong real-time requirements of millisecond level (ms) high-speed instruction encoding, decoding, and execution for the complex related control of the active control process, let alone complete the CNC Active Adaptive Control of Machining Process Based on Multiphysics Coupling Effects of Force, Heat and Wear in Machining State

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