Ultrasonic stamping type cutting and extruding integrated machining method

Abstract

The invention discloses an ultrasonic stamping type cutting and extruding integrated machining method. The ultrasonic stamping type cutting and extruding integrated machining method comprises the following steps that transverse ultrasonic vibration which is perpendicular to the cutting speed direction or contains a vibration component perpendicular to the cutting speed direction is applied to a cutting tool on a machine tool; cutting parameters and ultrasonic vibration parameters are set, so that a dynamic negative rear angle is generated in the cutting process, and ultrasonic-frequency impactextrusion is performed on the surface of a workpiece by a rear tool face of the tool; the extrusion overlap ratio is set; a grinding dulling standard of a rear tool face of an extruding and cutting tool is set; the vibrating and cutting track phase difference of adjacent rotation of the tool is controlled; the machine tool and ultrasonic vibration are started, so that workpiece cutting and extrusion reinforcement of the surface of the workpiece are completed through one working procedure. According to the ultrasonic stamping type cutting and extruding integrated machining method, a reinforcing working procedure is not needed to be additionally provided, and the surface of the workpiece can undergo extrusion reinforcement while the workpiece is cut.

Description

technical field [0001] The invention relates to the field of mechanical processing and workpiece surface strengthening, in particular to an ultrasonic stamping-type cutting-extrusion integrated processing method. Background technique [0002] With the development of high-end equipment such as aerospace, weapons, nuclear energy, and transportation, the requirements for the surface performance of its parts are also getting higher and higher. The main failure modes of materials are wear, corrosion, fatigue and so on. Under the action of load, fatigue cracks will be generated on the surface of the material, and its further expansion can cause fatigue fracture of the material, resulting in the overall failure of the component. Therefore, surface fatigue resistance manufacturing plays an important role in the production and manufacture of parts. In order to improve the reliability of parts and prolong their service life, surface strengthening technology is usually used to treat t...

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Problems solved by technology

[0003] However, the above commonly used surface strengthening methods all have deficiencies or development limitations.

Shot peening is not easy to accurately control the strengthening area, and the surface roughness of the processed workpiece will increase due to the plastic indentation formed by the impact of the shot; the rolling / extruding force is large, which easily affects the processing accuracy of weak rigid parts, and the processing speed When it is faster, it is easy to cause scratches on the surface of the workpiece or produce unfavorable residual stress, and it is not easy to use traditional machining equipment on the existing manufacturing line to achieve

Although laser shock peening can achieve good results, the impact peening efficiency is generally low, the processing process is time-consuming, and the laser shock peening equipment is very expensive, all of which limit the large-scale promotion of this technology

Their common problem is that an additional strengthening process must be added, and for narrow structures, the strengthening process has poor reach.

[0004] In ordinary cutting, it is usually possible to achieve a certain effect of ironing and strengthening the surface of the workpiece by adjusting the parameters such as the radius of the cutting tool edge and the depth of cut, or by setting a negative chamfer on the tool edge; however, these methods will bring Large cutting depth resistance, same as rolling / extrusion process, will affect the processing accuracy of weak rigid parts

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