CNC Machine Tool Processing Aluminum, How to Ensure the Stability of the Size in Processing?

First of all, under the premise of aluminum, there are several aspects to consider:

I. I. Irresistible factors:

1. The stability of the machine itself.  

If it is not a new machine tool or the machine tool has entered a large number of machining without commissioning, there will be a size error caused by the machine itself.

There are several factors that cause the error of the machine itself:

Mechanical aspects:

a. Loose between the servo motor and the screw.

b. Ball screw bearings or nut wear.               

c. Insufficient lubrication between the screw and the nut.

Electrical aspects:

a. Servo motor fault.               

b. Dirt inside the grating ruler.               

c. The servo amplifier is faulty. PMC recovery is possible in terms of system parameters, so it is omitted.

2. Cooling deformation after processing of work parts.  

This is basically unavoidable, during processing as much as possible to pay attention to the use of coolant, as well as in the in-place measurement, pay attention to the cooling work item deformation.

Second, avoidable factors:

1. Processing process. 

In fact, most of the actual processing errors are caused by unreasonable processing process, in order to ensure that the basic processing process (such as milling CNC processing "first thick after finishing, first face after hole, first large surface after small surface" or fixture use in the "reduce the number of clamps, try to use combination fixtures" and other basic processing process details) on the basis of minimizing the iron chips on aluminum parts caused by processing errors, because aluminum parts are very soft, excluded iron chips easy to make aluminum parts processing errors. For example, in FANUC or Hua zhong processing center, deep holes are used as far as possible with the G83 instruction, so that the iron chips can be discharged, rather than the G73 instruction.

2. Cutting three elements: cutting speed vc, intake f, cutting depth ap and tool compensation.  

In a nutsied way, it is to adjust the parameters to give full play to the cutting performance of the tool under the premise of ensuring the quality of processing and tool wear, so that the cutting efficiency is the highest and the processing cost is the lowest.  

3. Numerical calculations in manual programming and automatic programming.  

In manual programming, computational errors are also common, but now most production is automatic programming, and in the automatic programming process can be the maximum to avoid computational errors, data can ensure a certain degree of accuracy.

4. Inaccurate knife is also the cause of dimensional error factors, so, try to choose a good edge finder, if the machine has automatic to the knife that is better, if there is no edge finder, can only be based on a certain operating experience to take trial cutting and other measures.