A high-precision ultrasonic spot-sinking device applied to air drill

Abstract

The invention discloses a high-precision ultrasonic dimple device for pneumatic drill. A transducer main shaft is connected with a hexagonal structure of a pneumatic drill handle in a matched mode through a rear end outer hexagon structure to transmit torque, and a rear cover plate and ceramic stack are connected to the transducer main shaft in a sleeving mode and press against a front cover platethrough the rear cover plate. A sliding ring inner ring is matched with the transducer main shaft through a flat structure and the sliding ring inner ring abuts against the transducer main shaft by afastening screw; one end of a sleeve is connected with the pneumatic drill handle through a left-hand thread, and the other end of the sleeve is matched with a depth-limiting positioning sleeve through a copper sleeve; the depth-limiting positioning sleeve is limited by a spring collar to ensure that the depth-limiting positioning sleeve can move within a limited distance; a dimple drill bit andthe transducer main shaft are connected in a threaded mode and positioned by a conical surface; and a flat bottom drill sleeve and the depth-limiting positioning sleeve are connected through threads to ensure that the high-precision ultrasonic dimple device is perpendicular to the machined surface during dimple machining. The high-precision ultrasonic dimple device can effectively prevent the problems that the cutting temperature is too high during common dimple machining and a tool is seriously worn, the verticality and surface flatness of a simple hole can be improved, and the high-precisionultrasonic dimple device has an important influence on the improvement of the stealth performance of an aircraft.

Description

technical field [0001] The invention relates to an ultrasonic vibration spot-spotting device, more particularly, a small-volume, high-precision ultrasonic spot-sinking device applied to an air drill. The ultrasonic vibrating countersinking device is suitable for high-precision countersinking processing of fastening holes of composite materials, difficult-to-machine metal materials and non-metallic materials. Background technique [0002] Ultrasonic vibration cutting is a cutting method that adds an ultrasonic vibration to the tool to make the original continuous cutting process into an intermittent and special cutting effect. It was first proposed by Japanese scholars. Ultrasonic vibration cutting has the unique advantages of reducing cutting force and cutting temperature, improving surface quality and shape and position accuracy. However, the previous vibration processing devices have disadvantages such as complex structure, large volume, and inability to rotate, and are u...

AI Technical Summary

Problems solved by technology

However, the previous vibratory processing devices have disadvantages such as complex structure, large volume, and inability to rotate, and are usually used on machine tools or various machining centers.

Therefore, the poor portability of the vibrating device limits the application of vibration technology in light and portable hand tools. High-quality, high-efficiency and low-cost fastener hole spot facing processing for difficult-to-machine materials such as alloys

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