Detection device for knife point dynamic characteristics of numerical control machine tool and method of detection device

Abstract

The invention discloses a detection device for knife point dynamic characteristics of a numerical control machine tool and a method of the detection device. Mainly the problems that detection performance indexes of knife point dynamic characteristics of an existing numerical control machine tool are not comprehensive or accurate, and detection cost of instruments and cutting test pieces is high are solved. The detection device for the knife point dynamic characteristics of the numerical control machine tool comprises a supporting base, a connecting plate and an L-shaped supporting wall plate. The top of the supporting base is provided with displacement sensors in a penetrating manner through holes, wherein the displacement sensors are arranged in the manner that every two displacement sensors are perpendicular to each other; meanwhile, acquired temperature data of main heat sources of the machine tool are integrated so that a main shaft can acquire real-time location and posture information of a point of a knife point in the swinging or rotating process, and correlation calculation of accuracy and generation of compensating data are completed by automatically obtaining fused data information through a data collector and transmitting the fused data information to a computer at high speed to be recorded and analyzed. The detection device is ingenious in structural design, the knife point characteristic testing functions are comprehensive, universality is high, numerical control machining precision testing cost is greatly reduced, and good practical and popularization value is achieved.

Description

technical field [0001] The invention belongs to the technical field of numerical control machine tools, and relates to the detection of comprehensive accuracy of the dynamic characteristics of the tool tip of a machine tool, in particular to a comprehensive detection device and method for the dynamic characteristic accuracy of the tool tip of a numerical control machine tool. Background technique [0002] During the machining process of CNC machine tools, various error sources will be transmitted to the tool tip point through various electromechanical links, so that the tool tip point will deviate from the theoretical position, resulting in actual machining errors. With the development of CNC technology in the direction of high speed, high precision and multi-axis, the detection requirements of thermal deformation error and machining dynamic characteristic error of CNC machine tools are becoming more and more prominent. During the processing of CNC machine tools, under the j...

AI Technical Summary

Problems solved by technology

The inspection of the five-axis linkage machining accuracy of machine tools generally adopts the method of cutting NAS979 conical specimens or S-shaped specimens. The test piece needs to be disassembled and moved to the three-coordinate machine for final inspection. There are many links of precision loss, and the inspection cost is quite high. It is difficult to directly reflect the dynamic machining accuracy in the linkage process.

[0004] In addition, for the detection of the movement error of the tool tip, the traditional dial gauge is used to directly mount the meter for measurement, resulting in not only high requirements for the accuracy of the mounted meter, but also a high level of operating technology, and it is completely dependent on the naked eye to observe the pointer offset of the meter head and manually record and calculate. It is impossible to realize the complete data process recording of the continuous transient tool tip pose and temperature information, and there are many error links, and it is impossible to realize automatic and accurate analysis and high-precision calculation; modern precision testing instruments such as laser interferometers and laser trackers are used in The limitations of the linkage dynamic accuracy detection of multi-axis linkage machine tools are gradually emerging. For example, the laser interferometer is suitable for the accuracy detection of linear axes and cannot directly meet the measurement of large swing angle ranges, while the laser tracking with a price of several million yuan per machine is used. The instrument is still not accepted and recognized by the majority of machine tool users in terms of cost, convenience and ease of use.

Images