Do you know what errors exist in CNC machining? Today, the editor will discuss with everyone!

The rapid development of the manufacturing industry, high level of automation, and increasing diversity of demands from various industries have led to an increasing demand for processing quality and efficiency. Therefore, the industry environment has created an increasingly widespread application of CNC processing equipment.

Attention must be paid to the error problem of CNC processing equipment, and the main processing errors are divided into the following aspects:

Processing principle error:

The principle error of CNC machining is caused by the use of approximate machining motion methods or approximate tool profiles. Due to the existence of errors in machining principles, it is called machining principle error. The principle error is required to be within the allowable range.

Geometric error of the machine tool:

The manufacturing errors, installation errors, and wear during use of machine tools directly affect the machining accuracy of the workpiece. The main errors are the rotational motion of the machine tool spindle, the linear motion of the machine tool guide rail, and the error of the machine tool transmission chain.

Manufacturing error and wear of cutting tools:

The manufacturing error, installation error, and wear during use of CNC machining tools all affect the machining accuracy of the workpiece. In the process of cutting, the cutting edge, cutter face and workpiece, chip have strong friction, making tool wear. When the tool wear reaches a certain value, the surface roughness of the workpiece increases, and the chip color and shape change, accompanied by vibration. Tool wear will directly affect cutting productivity, machining quality and cost.

Fixture error:

The fixture errors in CNC machining include positioning errors, clamping errors, fixture installation errors, and tool setting errors. These errors are mainly related to the manufacturing and assembly accuracy of the fixture. In the CNC machining process, it is necessary to control the error within a certain range to ensure the machining accuracy of the workpiece.

Positioning error:

Positioning errors mainly include benchmark misalignment errors and inaccurate manufacturing errors of positioning pairs. When machining a workpiece on a machine tool, several geometric elements on the workpiece must be selected as the positioning reference for processing. If the selected positioning reference does not coincide with the design reference (which is used to determine the size and position of a certain surface on the part drawing), a non overlapping error of the reference will occur. The workpiece positioning surface and the fixture positioning element together form a positioning pair, The large positional variation of the workpiece caused by inaccurate manufacturing of the positioning pair and the fit gap between the positioning pairs is called inaccurate manufacturing error of the positioning pair.

Adjustment error:

In every process of precision parts processing, it is necessary to make adjustments to the process system in one way or another. Due to the inability to adjust accurately, there is an adjustment error. In the process system, the mutual position accuracy of the workpiece and tool on the machine tool is ensured by adjusting the machine tool, tool, fixture, or workpiece. When the original accuracy of machine tools, cutting tools, fixtures, and workpiece blanks meets the process requirements without considering dynamic factors, adjustment errors play a decisive role in mechanical processing errors.

Measurement error:

When measuring parts during or after processing, measurement accuracy is directly affected by measurement methods, measuring tool accuracy, workpiece and subjective and objective factors.

In practical operation, try to avoid the above CNC machining errors as much as possible, so as to minimize the negative impact caused by CNC machining errors.

Zhengheng Power has many years of technological foundation, mainly using Mazak, Muye, and Weiya machining centers. In response to the characteristics of easy deformation (elastic deformation, plastic deformation) in aluminum alloy processing, professional process methods (fixture design) are used to cope with it, and the accuracy of shape and position tolerance can reach 0.03mm. Zhengheng Power will continue to strive for innovation, apply years of accumulated experience and leading technology to various industries, and provide better technical support and services for customers. Welcome to visit and inspect Zhengheng Power!