Three kinds of precision description of CNC walking centers

In the process of CNC centering machine, centering machine processing accuracy has been further guaranteed. Generally speaking, in the process of using CNC centering machine, the processing diameter is relatively small, the maximum processing diameter is only 38 mm, the continuous development of technology makes centering machine in precision shaft processing has greater advantages. For enterprises, the use of CNC centering machine can effectively reduce labor costs, to reduce the production of defective products have an important impact and significance.

The accuracy of CNC centering machine is mainly divided into the following different types, respectively: static accuracy, positioning accuracy and dynamic accuracy, next let us understand together.

1, static accuracy: a comprehensive reflection of the key components of the machine tool after the assembly of the comprehensive geometric shape error. Static accuracy including geometric accuracy and positioning of the axes and clearance of the screw, dynamic accuracy for the product's continuous processing of the stability of the fluctuation detection, testing tools for the precision of the nanometer level, each of the geometric accuracy of the specific testing methods and standards are in accordance with the machine tool factory precision testing project requirements for testing. The static accuracy of the good and bad directly affects the normal use of machine tool CNC functions and performance. Therefore, the accuracy test is very important for the initial use of CNC centering machines and maintenance and adjustment of the machine tool after the recovery of technical indicators.  

2, dynamic accuracy: a comprehensive accuracy, which not only reflects the geometric accuracy of the machine tool and machining stability, but also includes the specimen materials, fixtures, ambient temperature, CNC machine tool performance, as well as cutting conditions and other factors caused by the error and measurement error. In order to reflect the true accuracy of the machine tool, to try to exclude the influence of other factors.

3, positioning accuracy: is the index-controlled centering machine coordinate axes in the CNC device under the control of the movement of the position accuracy can be achieved. Positioning accuracy can also be understood as the movement accuracy of the machine tool. Ordinary machine tools are manually fed, positioning accuracy is mainly determined by the reading error, while the movement of the CNC walking machine is realized by the digital program instructions, so the positioning accuracy is determined by the CNC system and mechanical transmission error. Machine tool operation is completed under the control of the CNC device, the precision that can be achieved by each moving part directly reflects the precision that can be achieved by the processed parts, so the positioning accuracy is a very important test content.