1. Three basic requirements for benchmark selection:

(1) The reference selection should be able to ensure accurate positioning of the workpiece, convenient, convenient and reliable loading and unloading.

(2) The selection criteria and the calculation of the size of each processing part are simple.

(3) Ensure machining accuracy. CNC machining center machine tool

2. Six principles for choosing positioning benchmarks:

(1) Try to choose the design datum as the positioning datum;

(2) When the positioning datum and the design datum cannot be unified, the positioning error should be strictly controlled to ensure the machining accuracy;

(3) When the workpiece needs to be clamped and processed more than twice, the selected datum can complete the processing of all key precision parts in one clamping and positioning;

(4) The selected benchmark should ensure the completion of as many processing contents as possible;

(5) During batch processing, the part positioning datum should be as close as possible to the tool setting datum established in the workpiece coordinate system;

(6) When multiple clamping is required, the datum should be uniform before and after.

Confirmation of machining center fixture:

1. Basic requirements for fixtures:

(1) The clamping mechanism must not affect the feed, and the processing part must be open;

(2) The fixture can be installed on the machine in a directional manner; (3) The fixture has good rigidity and stability.

2. The selection principle of machining center fixture:

(1) Under the premise of ensuring processing accuracy and production efficiency, the general fixture is preferred;

(2) Simple special fixtures can be considered for batch processing;

(3) Multi-station fixtures and high-efficiency pneumatic, hydraulic and other special fixtures can be considered for mass processing;

(4) Group fixtures should be used when using group technology;

Quanzhou Yueli Automation Equipment Co.,Ltd is a production enterprise led by drilling tapping compound machine, drilling tapping centers and drilling tapping milling process center. The company is committed to serving various of industries such as sanitary ware, fire protection valves, hardware, electrical hardware, aerospace, machine manufacturing and so on. You can contact ue:Nina.h@yueli-tech.com.