The solution of CNC precision machining to reduce the surface damage of aluminum profiles

The surface damage of precision materials is a problem that many CNC precision processing factories will encounter. How to prevent or reduce the surface damage of aluminum profiles? Since the surface damage of aluminum profiles will greatly reduce the product rate of aluminum profiles and increase the production cost of many companies, we have found that this problem has become a hot topic for most companies.

In order to solve the problem of surface damage of aluminum profiles, we must find out the reasons and find solutions from the reasons. What causes the problem of surface damage of aluminum profiles during precision CNC machining? Let's talk about the reasons for human factors and precision CNC machining equipment.

Human factors mainly refer to the damage caused by unfamiliar operators dragging profiles on the swing bed. In addition, in the process of transportation, improper placement of aluminum profiles can cause damage to the profiles due to friction or extrusion.

If it is the damage caused by the processing equipment, it cannot be ruled out that the mold cavity or the work has dust and debris, which makes the hardness of the working belt low and causes the aluminum profile to be scratched during the extrusion process.

If there are aluminum chips in the precision CNC machining track or swing bed, it may also cause scratches on the surface of the aluminum profile and affect the yield.

In short, there are many factors that affect the surface scratches of aluminum profiles, so how should we deal with them?

For the damage caused by human factors, we should strengthen the management of personnel, and aluminum profiles need to be handled with care to avoid random dragging. For problems in the processing process, the author recommends that you regularly check the precision CNC machining track and swing bed, and remove impurities and aluminum chips on it. When placing, leave a gap in the middle and lay more felt. Prevent collision and friction.

CNC machining of precision parts is the basic criterion to be satisfied:

1. Datum first

That is to machine the datum surface first. During the machining process, the parts are used as The surface of the positioning datum should be processed first, so as to provide a precise datum for the processing of the subsequent process as soon as possible.

2. Distinguish the processing stages

The surfaces with high precision CNC machining quality requirements are divided into processing stages, which can generally be divided into three stages: rough machining, semi-finishing and finishing. The first is to ensure the quality of processing; it is conducive to the scientific use of equipment; it is convenient to organize the heat treatment process; and it is convenient to find the defects of the blank.

3. Face first, then hole

For parts such as box, bracket and connecting rod, the plane should be machined first and then the hole should be machined. In this way, the machining hole can be positioned on the plane, the orientation accuracy of the plane and the hole can be ensured, and the machining of the hole on the plane can be facilitated.

4. Finishing

The finishing of the main surface, such as grinding, honing, fine grinding, rolling, etc., should be placed at the end of the process path. The general guidelines for the formulation of fine CNC machining roads and the formulation of precision CNC machining regulations can be roughly divided into two parts. The first is to formulate the process path of parts processing, and then determine the process scale of each process, the equipment and process equipment used, as well as cutting standards, working hour quotas, etc.