Hole group processing method for flexible guide rail based on coordinate system of hole-making equipment

[0017] Example

[0018] like figure 1 As shown, the application environment of this embodiment includes: workpiece 1 and equipment processing range 2, 3 is the machine tool coordinate system related to the machine tool hardware, 4 is the workpiece coordinate system related to the workpiece, the value of γ angle 5 is the value of the deflection angle, That is, the included angle between Xm and Xp, 6 is a group of holes to be processed, 7 and 8 are two process positioning K holes respectively.

[0019] like figure 2 As shown, the process of this embodiment includes:

[0020] The first step, the process of returning to zero for each axis, determines the coordinate system of the machine tool: make the X-axis and Y-axis of the machine tool automatically return to zero. After the zero point of each machine tool axis is determined, the direction of each axis is the direction of the axis according to the direction limited by each axis of the equipment itself. At this time, the coordinate system of the machine tool can be determined;

[0021] The second step, the determination of the auxiliary hole coordinates and data collection: the two K holes are pre-planned process holes, and the relative positions of the holes to be processed are fixed. During the processing preparation period, use the detection equipment to measure the actual position of the two holes on the workpiece and record it with variables.

[0022] The third step is to eliminate the deflection angle error in the C direction: by calculating the difference between the actual value and the preset value of the connection angle of the two K holes, the deflection angle γ is obtained, specifically: according to the process requirements, in order to determine the number of holes to be processed Position, there should be two process positioning holes on the workpiece. In the digital model and in the actual processing, the relative positions of the two process holes and the holes to be processed are strictly consistent. First calculate the angle γ1 between the line connecting the two holes and the X axis in the programming coordinate system in the digital model (or in the processing code); then measure the actual position of the two holes on the workpiece during the processing preparation period, In order to obtain the angle γ2 between the line connecting the two holes and the X axis of the machine tool. The difference between the two γ=γ2-γ1 is the workpiece positioning deflection angle to be adjusted.

[0023] Finally, do -γ angle coordinate transformation on the original program coordinate system, and set one of the K holes as the zero point of the workpiece. So far, the machine tool coordinate system and workpiece coordinate system in the flexible guide rail automatic hole-making equipment have been determined, and the deflection error has been eliminated.

[0024] The focus of the invention lies in the method for determining the coordinate system of the flexible guide rail hole-making equipment. Due to the adoption of the above technical scheme, the positioning of holes in three-dimensional space is transformed into the problem of group hole positioning in two-dimensional plane, which simplifies the calculation steps and improves the processing efficiency.

[0025] The method for processing the hole group of the flexible guide rail has been applied to an automatic hole-making machine for the flexible rail specially used for aircraft, and good results have been achieved. It not only solves the problem of group hole positioning on the surface of the curved surface, but also improves the positioning accuracy of drilling holes.