Positioning standard for CNC machining of aluminum casing

Here is to explain the positioning standard of CNC processing of aluminum shell, we all know that the electrical and thermal conductivity of aluminum shell is very good, second only to silver copper gold. Therefore, many industries will consider a variety of aluminum shells when selecting shells, but the quality difference of aluminum shells is related to the processing technology.

In CNC machining of aluminum shell, the choice of positioning standard determines the quality of aluminum parts. The requirements of dimensional accuracy and mutual position accuracy of aluminum parts greatly affect the arrangement of machining sequence between parts surfaces. When the workpiece is equipped with a fixture, the choice of positioning criteria will also affect the complexity of the fixture structure. This requires the fixture to be able to withstand a large cutting force, while meeting the positioning accuracy requirements. Therefore, the choice of positioning standard is an important process problem.

The following is the positioning standard for CNC machining of aluminum shell.

First, it depends on the criteria used in the design of aluminum components.

Second, the mutual reference basis, that is, if the position between the two processing surfaces on the workpiece requires high precision, it needs to be completed by the mutual parametric repeated processing method of the two processing surfaces;

Thirdly, when cross-positioning, it is necessary to design a multi-reference positioning fixture to prevent changes in positioning standards, but also to check the processing quality of the previous process to prevent the defects of the previous process from causing processing problems.

When the design standard of the aluminum parts positioned by the aluminum shell CNC machining center is basically difficult to match, the assembly drawing analysis should be carried out to determine the design function of the aluminum part design standard, and the tolerance range between the two. Positioning standards and design standards should be strictly determined by dimensional chain calculation to ensure machining accuracy.