Normal Angle Measuring Unit

Abstract

The invention belongs to the aircraft assembly automation technology, and relates to a normal angle measurement unit for real-time measurement of the normal direction of the curved surface of a skin workpiece. The unit includes a supporting plate, a fixed ring of the universal mechanism, an outer ring of the universal mechanism, a displacement sensor, a measuring contact end, a measuring plate, and a return spring. The invention has an exquisite design structure. For skin workpieces, since the surface radian changes with different positions, the normal direction adjustment unit can adapt to the radian change of the skin surface and measure the difference between the actual normal direction and the theoretical normal direction in real time. According to the deviation value, adjust the deviation angle between the actual normal direction and the theoretical normal direction to a predetermined range to ensure the normal accuracy of the hole making. The curved surface hole-making normal direction measuring unit of the present invention adopts the method of on-line measurement by displacement sensors, which can adjust the normal deviation between the tool axis and the skin surface in real time, so as to ensure the hole-making quality of the skin workpiece.

Description

technical field [0001] The invention belongs to the aircraft assembly automation technology, and relates to a normal angle measurement unit for real-time measurement of the normal direction of the curved surface of a skin workpiece. Background technique [0002] A large number of skin workpieces are used in aerospace, high-speed vehicles and other fields, and airplanes and high-speed trains have strict requirements on aerodynamic shape. At present, skin workpieces mostly adopt riveting structure, and the hole quality defects caused by poor normal precision of hole making directly affect the aerodynamic shape of the skin and even the safety performance of the workpiece structure. During the automatic hole-making process of the robot, the hole-making equipment makes holes by pressing the surface of the workpiece to closely fit it according to the pose information of the hole-making point in the theoretical model of the skin workpiece. However, due to the installation error of...

AI Technical Summary

Problems solved by technology

However, due to the installation error of the workpiece and other reasons, there is a certain deviation between the actual model of the workpiece and the theoretical model. At this time, when the hole is made on the surface of the workpiece, since the tool is not perpendicular to the surface of the workpiece, that is, there is an angular deviation between the tool axis and the surface normal, this will cause Cause quality defects in hole making

[0003] At present, the number of holes that need to be made in skin workpieces such as aircrafts and high-speed trains is very large. Manual hole making has prominent problems such as poor quality consistency and low efficiency. With the continuous increase in production demand, the use of automated hole making is an inevitable trend in the future. , but due to the installation error of the workpiece and other reasons, there is a certain deviation between the actual model of the workpiece and the theoretical model. At this time, when the hole is made on the surface of the workpiece, the quality of the hole is defective because the tool is not perpendicular to the surface of the workpiece.

Images