Acceptance standards and precautions for machining centers:
The acceptance inspection items of the machining center are mainly used to determine whether the various technical indicators on the qualification certificate are qualified. Generally speaking, the acceptance can be divided into several links such as unpacking inspection, visual inspection, machine tool performance and CNC function verification, precision inspection, etc. . The following is an introduction to the acceptance criteria and precautions of the machining center:
The unpacking inspection in the inspection items of the machining center is mainly to check and accept item by item according to the packing list. Any missing parts or discrepancies in model specifications should be recorded and contact the supplier and other departments in time. The appearance inspection mainly depends on the appearance of the paint quality, whether the equipment has any obvious defects that can be seen by the naked eye, such as collision damage, deformation, moisture, and rust.
Accuracy testing is generally the last item in the installation and debugging of machine tools. Its reference standards include "General Rules for Precision Testing of Metal Cutting Machine Tools", or "Inspection Conditions for Machining Centers", etc. The accuracy testing of ordinary small machining centers can be mainly divided into geometric accuracy testing and positioning There are 3 items of precision inspection and cutting dryness inspection.
The geometric accuracy inspection of the machining center comprehensively reflects the geometric shape errors of the key parts of the machine tool and the co-assembly plant, and is generally inspected item by item according to the geometric accuracy inspection list of the machine tool.
The main content of the geometric accuracy inspection of the machining center is as follows:
①The flatness of the work surface.
② The mutual perpendicularity of the movement of each coordinate axis.
③The parallelism of the worktable surface when moving in the direction of the X and Y coordinate axes.
④The parallelism of the T-slot side surface of the N worktable in the direction of the xA4 standard axis.
⑤ Axial movement of the spindle.
⑧ The spindle will jump toward the stack when it is stuck.
⑦The parallelism of the spindle axis when the spindle box moves along the Z coordinate axis.
⑧Feng axis asks the verticality of the axis of rotation to the work surface.
⑨The linearity of the spindle tip moving in the direction of the Z coordinate axis.
It can be seen from the above 9 accuracy requirements that the first type of accuracy requirements are requirements for the fertility, parallelism, and perpendicularity of the movement of the large moving parts of the machine tool, such as the bed, column, sliding plate, and axle box; The second category is the requirements for the cutting motion of the spindle rotation accuracy and the linear motion accuracy of the cutting motion. Therefore, these geometric accuracy comprehensively reflect the geometric accuracy of the mechanical coordinate system of the machine and the geometric accuracy of the spindle representing the cutting motion in the mechanical coordinate system.
