Mechanical arm for automatically tightening bolts of aero-engine disc-drum structural parts and its working method

Abstract

The invention discloses an automatic tightening mechanical arm for bolts of an aeroengine drum structure component, which includes a clamping device, a bolt tightening head, a bolt fixing sleeve, a first transmission gear, a second transmission gear, a servo motor, a cylinder, a rotation angle sensor and a torque sensor; The upper part of the clamping device has a long axis running through it, one end is connected to the output shaft of the servo motor, and the other end is connected to the rotation angle sensor; the lower part of the clamping device is equipped with a bolt tightening head and a bolt fixing sleeve, and the bolt tightening head is connected to the torque sensor. , the torque sensor is connected to the two axes of the transmission gear. The torque sensor and the rotation angle sensor control the servo motor in real time, and use the output value as the input signal of the servo motor to perform negative feedback excitation to achieve automatic tightening. The invention can not only tighten the bolts, but also control the servo motor in real time through the torque sensor and the rotation angle sensor, so as to achieve the best tightening effect and a high degree of automation.

Description

technical field [0001] The invention belongs to the technical field of aviation automation assembly, and in particular relates to a robot arm for automatically tightening bolts of a disc drum structure part of an aero engine. Background technique [0002] As an important part of an aero-engine, the disc-drum structural part is an important factor affecting the stability and safety of the engine operation. It is usually composed of a disc, a cylinder and a taper sleeve. The above three parts are connected by detachable bolts. Parts are pressed and connected to form a whole rotor structure, and the bolts are evenly distributed on the pressing surface of the disc, and the torque is transmitted by the friction force of the pressing surface. Since the disc drum structure is a rotatable drum at the wheel rim, the rigidity of the structure is better; and the centrifugal force is borne by the wheel disc, so the strength of the structure is higher. In view of these advantages, disc-...

AI Technical Summary

Problems solved by technology

For example, in Chinese patent applications such as CN201210229080.9, CN201610211363.9, CN201610723895.0, CN201610382080.0, CN201610213153.3, CN201010113070.X, 201410600722.0 and other Chinese patent applications, but the automation of several or more types of bolts is disclosed, The bolt tightening effect cannot be quantitatively evaluated, and the structure of the device is not compact enough, it takes up a large space, and cannot be adjusted actively. It still needs to be operated by workers during the tightening process, and it cannot be connected with the robot arm widely used in the industry at present. , not suitable for occasions with complex forms such as drum structures with multiple sets of complex bolt holes

Images