Positioning standards for CNC machining of aluminum shells
What is to be explained is the positioning standard for CNC machining of aluminum shells. We all know that the electrical and thermal conductivity of aluminum shells is very good, second only to silver, copper and gold. Therefore, many industries will consider various aluminum shells when choosing them, but the quality difference of aluminum shells is related to the processing technology.
In the CNC machining of aluminum casings, the selection of positioning standards determines the quality of
Aluminum Parts. The requirements for dimensional accuracy and mutual positional accuracy of aluminum parts greatly affect the arrangement of the processing sequence between the surfaces of the parts. When the workpiece is equipped with a fixture, the selection of positioning criteria also affects the complexity of the fixture structure. This requires that the fixture, while meeting the positioning accuracy requirements, be capable of withstanding a relatively large cutting force. Therefore, the selection of positioning criteria is an important technological issue.
Let's talk about the positioning standards for CNC machining of aluminum shells.
First, it is necessary to look at the standards adopted in the design of aluminum parts;
The second is the mutual reference benchmark. That is to say, if the positional accuracy between two processing surfaces on the workpiece is required to be relatively high, the method of repeatedly processing the two processing surfaces with mutual reference should be used to complete it.
Secondly, when performing cross-positioning, fixtures should be designed for multi-reference positioning to prevent changes in positioning standards. At the same time, the processing quality of the previous process should be inspected to prevent processing problems caused by defects in the previous process.
When the positioning of aluminum parts in an aluminum shell CNC machining center is basically difficult to match the design standards, it is necessary to conduct a good analysis of the assembly drawing, determine the design function of the aluminum part design standard, and strictly define the tolerance range between the positioning standard and the design standard through the calculation of the dimension chain to ensure the processing accuracy.
