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In view of the fact that the traditional five-axis machine tool cannot process some parts with complex inner cavity structure (such as hydrostatic bearings), an angle head is arranged on the spindle of the traditional five-axis machine tool to process the parts with complex internal shape. The loading angle head of the double-swing five-axis machine tool is studied as an example. Firstly, the kinematic model of five-axis machine tool with angle head is established by inverse kinematics. Then, a special post-processing software is developed based on JAVA software. Finally, the effectiveness of the method and the algorithm is verified by simulating cutting and actual processing parts. Therefore, it is very important to select the angle head of five-axis machine tool for processing complex inner cavity parts effectively. Introduction The traditional five-axis machine tools can be divided into three types according to their configuration, i.e. table turning and swing, tool turning and swing, tool swing and table turning. The shape and range of parts processed by different types of machine tools are different. Although these types of machine tools can process many parts of shape and structure, it is impossible to process curved surfaces such as cylindrical cavity with angle and inclination. Although they are the most suitable types for machining inclined curved surfaces of inner holes, the machine tools of tool swing and table turning are not often to meet the processing requirements because of the cylindrical diameter inside the holes is too small and too deep. Especially when processing complex shapes such as internal oil grooves of hydrostatic bearings, it is necessary to adopt forming tools or an angle head to meet the requirements. However, the use of forming tools will increase the cost of use and require multiple clamping .In order to reducing the cost and improving the accuracy of processing, this requirement can be met by using the double-swing head five-axis CNC machine tool of the angle head spindle. This research is mainly aimed at the studying work of machining complex cylindrical innet surface with double swing heads and five-axis CNC machine tool with angle head. In order to improve the processing accuracy, reduce the using cost and facilitate the processing, a special post-processor for double-swing five-axis CNC machine tool with angle head spindle is developed. Finally, the feasibility of this method is verified by simulation and actual processing of a sample. Application of Angle Head Figure 1 shows the use of angle head. In general processing, the normal vector of the surface during side milling groove is not consistent with the vector of the tool's axial processing, as shown on the left of Fig. 1 (a). Based on this, the normal vector of the surface matched by an angle head is consistent with the tool axial vector, as shown on the right of Fig. 1 (b). Figure 1 (b) shows the type of angle head used on the rotating axis. Among them, there are three-axis angle head processing, four-axis angle head processing and five-axis angle head processing. Five-axis CNC machine tool configuration angle head is easy to achieve, and increases the freedom of processing, thus expanding the scope of use of five-axis CNC machine tools. In order to successfully perform five-axis machining with angle head, it is necessary to analyze its kinematics model and develop special post-processing software.

Study on Post-Processor of Double Swing Head 5-axis Machine Tool with Angle head Spindle