Ultrasonic transduction equipment for tapping processing and torsional tapping machine

Abstract

The invention discloses ultrasonic transduction equipment for tapping processing and a torsional tapping machine. The ultrasonic transduction equipment comprises an upper load block which weakens thelongitudinal vibration energy transfer and has a heat-dissipating function and a lower load block which enhances transfer of the longitudinal vibration energy to a screw tap and generates torsional vibration transformation. A transduction component capable of achieving converting to generate longitudinal vibration mechanical energy is mounted between the upper load block and the lower load block.When the longitudinal vibration generated by the transduction component is diffused to the outer surface of the lower load block, the lower load block where a spiral groove is machined converts part of longitudinal vibration into torsional vibration, and vibration and torsion are coupled to from a torsional vibration effect which is diffused to the screw tap mounted on the bottom surface of the lower load block, so that the screw tap generates a torsional vibration action force for tapping processing of a workpiece. The ultrasonic transduction equipment provided by the invention can generate acompound vibration mode combining torsion and vibration to drive the screw tap to generate the torsional vibration effect for a tapping processing course well.

Description

technical field [0001] The invention relates to an ultrasonic transducer device used in a tapping process, and a torsion tapping machine equipped with the ultrasonic transducer device, belonging to the technical field of ultrasonic tapping in mechanical processing. Background technique [0002] As a fixed method with reliable connection, easy assembly and disassembly, and simple structure, threaded connection has occupied about 60% of the market share in daily production and life, especially in aerospace, military technology, national defense industry, and mechanical equipment. has a pivotal role. Moreover, thread processing technology is generally used as the final process of mechanical processing technology, which directly determines the quality of the entire workpiece. [0003] However, at this stage, under the limitation of industrial processing capacity, only some metals with low toughness such as copper, aluminum, cast iron, and ordinary carbon steel can be processed ...

AI Technical Summary

Problems solved by technology

Due to the problem of the moment of inertia of the motor and the step angle of the motor, the most important thing is that the torsional motion required for the tapping process cannot be realized. Therefore, it is fundamentally determined that this method has low vibration frequency, low machining accuracy, and is prone to The phenomenon of slipping and stripping cannot meet the defects of fast, efficient and high-precision processing, so this method has not achieved substantial large-scale application

[0007] The third is to use the combination of ultrasonic longitudinal high-frequency vibration and mechanical low-frequency vibration. Its realization principle is as follows: figure 2 As shown, although it uses ultrasonic technology to increase the frequency of high-frequency vibration, the high-frequency vibration it generates is still longitudinal vibration in essence. Compared with low-frequency vibration, only the vibration amplitude becomes smaller and the vibration frequency increases. That's all, still can't realize the required torsional motion of the tapping process, thus still not get rid of the problem that the above-mentioned low-frequency mechanical vibration produces, moreover, also produced low-frequency (frequency is less than 100Hz) and high-frequency (frequency is greater than 15kHz) interaction The problem of coupling interference, so a series of problems encountered in the project, such as easy breakage of taps, thread removal, wrong thread, incorrect pitch, and incorrect pitch diameter, etc., have not been solved.

[0008] All in all, although the existing internal thread processing methods can meet the needs of daily production and life for metal materials such as iron, carbon steel, alloy steel, and aluminum alloy, and large-diameter internal threads, but for internal thread processing of small and medium diameters below M8 And high-strength, high-viscosity, high-toughness materials, such as stainless steel, titanium alloy, hard alloy steel, etc., due to the problem of the strength and stiffness of the tap, or the impact of debris, or the problem of the moment of inertia of the servo motor, in the existing conditions However, it is still impossible to meet the needs of high-efficiency and high-precision machining

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