Wed Sep 18 10:18:02 CST 2019
The author participated in the processing research of thin-walled products. The CNC machining tool used was CK7525, which mastered the processing of thin-walled hole parts. The shape of the product is shown in Figure 1. This product is a component used in aviation machinery. The hole wall is very thin, and the diameter is relatively large, and the processing precision is high, which brings great difficulty to the processing.
In order to process the product on a CNC milling lathe to meet the requirements, we have developed a reasonable process and designed some special fixtures and unique circle sleeves. This paper mainly describes the processing process of the product from the three aspects of process analysis, fixture design and processing steps. In terms of appearance, this part belongs to the thin-walled parts of the revolving body. We mainly consider roughing on a horizontal lathe first, then semi-finishing and finishing on a CNC lathe to complete the workpiece.
Since the wall thickness of the workpiece is only 2.16mm, and the diameter of the CNC machining is large, the expansion coefficient of the metal is large. If the semi-finishing and finishing vehicles are continuously turned in one clamping, the cutting heat generated will greatly affect the dimensional accuracy of the workpiece. At the same time, the following characteristics of this part must be considered.