CN-122012881-A - Thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device and method

CN122012881ACN 122012881 ACN122012881 ACN 122012881ACN-122012881-A

Abstract

The invention discloses a thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device and a method, which relate to the technical field of gear processing surface modification and strengthening, the device comprises a machine tool body, a slide carriage box, a gear positioning clamp, a thermal field assembly, an electric pulse strengthening assembly, an ultrasonic assembly, an on-site monitoring assembly and a gear indexing assembly, wherein the machine tool chuck of the gear indexing assembly is oppositely arranged, two ends of the gear positioning clamp are respectively fixedly provided with insulating parts, the insulating parts at two ends are respectively clamped and fastened on the machine tool chuck and the gear indexing chuck, the thermal field assembly is used for applying a thermal field to a gear, the electric pulse strengthening assembly is used for applying a pulse current field to the gear, the ultrasonic assembly comprises an ultrasonic generator and rolling wheels connected with the ultrasonic generator, the rolling wheels can be meshed with tooth surface contours of the gear, and the on-site monitoring assembly is used for monitoring deformation of the gear before and after ultrasonic rolling. The invention can effectively improve the fatigue resistance of the gear.

Inventors

LIANG ZHIQIANG
LI ZEKUN
LI XUEZHI
YUAN XIANGYU
XIE LIJING
MA XIAOFAN
DU YUCHAO
XIONG LINGDA
MA YUE

Assignees

北京理工大学

Dates

Publication Date: 20260512
Application Date: 20250922

Claims (10)

1. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device comprises a machine tool body and a slide carriage box arranged on the machine tool body, and is characterized by further comprising a gear positioning clamp, a thermal field assembly, an electric pulse strengthening assembly, an ultrasonic assembly, an in-situ monitoring assembly and a gear indexing assembly, wherein the gear indexing assembly is fixed on the machine tool body and is opposite to a machine tool chuck, the gear positioning clamp is used for fixedly mounting gears, insulating parts are respectively fixedly arranged at two ends of the gear positioning clamp, the insulating parts at two ends are respectively clamped and fixed on the machine tool chuck and the gear indexing chuck of the gear indexing assembly, the thermal field assembly is fixed on the machine tool body and is used for applying a thermal field to the gears, the electric pulse strengthening assembly is fixed on the machine tool body and is used for electrically connecting the gear positioning clamp, the ultrasonic assembly comprises an ultrasonic generator and a rolling wheel connected with the ultrasonic generator, the ultrasonic generator is fixed on a tool rest, the rolling wheel can be meshed with the gear profile of the gear, and the slide carriage box is used for carrying out the rolling deformation before the ultrasonic pulse strengthening assembly is fixed on the machine tool body.
2. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device of claim 1, wherein the thermal field assembly comprises a support and heat pipes, the support is fixed on a machine tool body, two heat pipes are fixedly arranged on the support, the two heat pipes are respectively positioned on two sides of the gear, and the two heat pipes are electrically connected with a thermal field power supply.
3. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device of claim 2, wherein the thermal field assembly further comprises a temperature monitoring device for monitoring the temperature of the applied thermal field in real time.
4. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device of claim 1, wherein the electric pulse strengthening component comprises an insulating supporting seat, two conductive metal blocks, an anode lug and a cathode lug, the insulating supporting seat is fixed on a machine tool body, the two conductive metal blocks are fixed on the insulating supporting seat, the two conductive metal blocks are respectively positioned on two sides of the gear positioning clamp, the two conductive metal blocks are respectively in conductive contact with two sides of the gear positioning clamp, the two conductive metal blocks are respectively connected with the anode lug and the cathode lug, the anode lug is connected with an anode of a pulse power supply, and the cathode lug is connected with a cathode of the pulse power supply.
5. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device of claim 1, wherein the ultrasonic assembly further comprises a force measuring instrument, the ultrasonic generator is fixed on the machine tool rest through the force measuring instrument, and the force measuring instrument is used for monitoring ultrasonic rolling pressure in real time.
6. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device of claim 1, wherein the ultrasonic assembly is connected with an ultrasonic power supply.
7. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device of claim 4, wherein the gear positioning fixture comprises a gear positioning shaft, the gear is fixedly arranged on the gear positioning shaft, one side of the conductive metal block, which faces the gear positioning shaft, is provided with an arc surface with the same radius as the gear positioning shaft, and the arc surface is tightly contacted with the gear positioning shaft.
8. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device according to claim 1, wherein the rolling wheel is made of SiC.
9. The thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device according to claim 1, wherein a circulating oil groove is arranged at the bottom of the machine tool body.
10. A thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening method, characterized by comprising the following steps based on the thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device of any one of claims 1-9: S1, scanning the tooth root to be reinforced and the tooth surface profiles on two sides of the tooth root through the in-situ monitoring component, transmitting data to a computer, fitting out the tooth root and the tooth surface profiles on two sides of the tooth root, and primarily determining technological parameters required by reinforcement; S2, applying a heating field to the tooth root to be reinforced and the tooth surfaces on the two sides of the tooth root to be reinforced through the heating field assembly according to the technological parameters, applying a pulse current field to the gear through the electric pulse reinforcing assembly, driving the rolling wheel to feed through the slide carriage box, and carrying out ultrasonic rolling reinforcement on the tooth root to be reinforced and the tooth surfaces on the two sides of the tooth root to be reinforced; S3, scanning the reinforced tooth root and the tooth surface contours on two sides of the tooth root through the in-situ monitoring component, transmitting data to a computer, fitting the tooth root and the tooth surface contours on two sides of the tooth root, comparing the tooth root with the contour before reinforcement and the contour determined during gear design, and deciding whether re-reinforcement is needed; S4, if the reinforcement is needed again, determining the technological parameters needed by the next reinforcement, returning to the step S2, and if the reinforcement is not needed again, jumping to the step S5; s5, rotating the gear, controlling the rotation angle of the gear through the gear indexing assembly, and rotating the next tooth root to be reinforced and tooth surfaces on two sides of the tooth root to be reinforced to a reinforced position; And S6, repeating the steps S1-S5 until the reinforcement of all tooth roots and tooth surfaces is completed.

Description

Thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device and method Technical Field The invention relates to the technical field of modification and reinforcement of gear processing surfaces, in particular to a thermal field-electric field-ultrasonic multi-field composite gear rolling reinforcement device and method. Background Gears are important elements of mechanical products, and gear transmission is an important form for transmitting mechanical motion and power, and has been widely applied to various industrial fields such as aerospace, vehicle traffic, instruments and meters, and the like. The gear is used in complex severe interaction environments such as high rotation speed, heavy load, high-low temperature alternation, corrosion oxidation and the like for a long time, and is subjected to the action of severe impact load and alternating load, so that fatigue failure is very easy to occur. In the service process of the gear, the tooth root part is easy to crack, break, and the like, and the tooth surface part is easy to have contact fatigue failure such as pitting and peeling, and the like. Bending fatigue failure of the gear tooth root and contact fatigue failure of the tooth surface restrict the improvement of the fatigue life of the gear, and further seriously jeopardize the service safety of equipment. In the processing and manufacturing of the gear, the conventional mechanical shot blasting process at the present stage can introduce residual compressive stress and improve the surface hardness, so that the contact fatigue life of the gear is improved to a certain extent. However, the depth of the residual compressive stress layer introduced by shot peening is shallow, the surface roughness after shot peening is improved, stress concentration is easier to induce, and the fatigue resistance potential of the gear is further explored. In view of this, in order to improve the fatigue resistance of gears, we propose a thermal field and pulsed current field assisted ultrasonic rolling strengthening technique. Disclosure of Invention The invention aims to provide a thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device and method, which are used for solving the problems in the prior art and effectively improving the fatigue resistance of gears. In order to achieve the above object, the present invention provides the following solutions: The invention provides a thermal field-electric field-ultrasonic multi-field composite gear rolling strengthening device which comprises a machine tool body, a slide carriage box arranged on the machine tool body, a gear positioning clamp, a thermal field assembly, an electric pulse strengthening assembly, an ultrasonic assembly, an in-situ monitoring assembly and a gear indexing assembly, wherein the gear indexing assembly is fixed on the machine tool body and is opposite to a machine tool chuck, the gear positioning clamp is used for fixedly mounting gears, insulating parts are respectively fixedly arranged at two ends of the gear positioning clamp, the insulating parts at two ends are respectively clamped and fixed on the machine tool chuck and the gear indexing chuck of the gear indexing assembly, the thermal field assembly is fixed on the machine tool body and is used for applying a thermal field to the gears, the electric pulse strengthening assembly is fixed on the machine tool body and is used for electrically connecting the gear positioning clamp, the ultrasonic assembly comprises an ultrasonic generator and a rolling wheel connected with the ultrasonic generator, the ultrasonic generator is fixed on the machine tool rest, the rolling wheel can be meshed with the gear profile of the gear, and the slide carriage box is used for monitoring the deformation before the gear is fixed on the slide carriage. In an embodiment, the thermal field assembly comprises a support and heat pipes, the support is fixed on the machine tool body, two heat pipes are fixedly arranged on the support, the two heat pipes are respectively located on two sides of the gear, and the two heat pipes are electrically connected with the thermal field power supply. In one embodiment, the thermal field assembly further comprises a temperature monitoring device for monitoring the temperature of the applied thermal field in real time. In an embodiment, the electric pulse strengthening component comprises an insulating supporting seat, two conductive metal blocks, an anode lug and a cathode lug, wherein the insulating supporting seat is fixed on the machine tool body, the two conductive metal blocks are fixed on the insulating supporting seat, the two conductive metal blocks are respectively positioned on two sides of the gear positioning clamp, the two conductive metal blocks are respectively in conductive contact with two sides of the gear positioning clamp, the two conductive metal blocks are respectively connected with