FQA

The influence of position error on machining accuracy in CNC lathe machining:

Position error refers to the degree of variation or deviation between the actual surface, axis, or symmetrical plane of the processed part relative to its ideal position, such as verticality, positional accuracy, symmetry, etc.

The position error in CNC machine tool processing usually refers to dead zone error, mainly caused by clearance and elastic deformation during the transmission process.

And in processing, the cutter head of the machine tool needs to overcome factors such as friction, which can lead to positional errors. In open-loop systems, position accuracy is greatly affected, while in closed-loop servo systems,

It mainly depends on the accuracy of the displacement detection device and the speed amplification coefficient of the system, and generally has little impact.

The machining accuracy error caused by geometric errors in CNC lathe machining;

In CNC lathe machining, the geometric accuracy of the lathe is influenced by external factors such as external forces and heat generated during the machining process.

The geometric deformation of parts processed on a lathe can lead to geometric errors.

According to research, there are two main reasons for geometric errors in CNC lathes: internal factors and external factors.

The internal factors that cause geometric errors in a lathe refer to the geometric errors caused by the machine itself,

For example, the levelness of the bed workbench, the levelness and straightness of the lathe guide rail, and the geometric accuracy of the lathe tools and fixtures.

External factors mainly refer to geometric errors caused by external environment and thermal deformation during the machining process, such as cutting tools or parts during the cutting process,

Due to thermal expansion and deformation, geometric errors are generated, which affect the machining accuracy of lathes and parts.