CN-122012880-A - Device and method for pulse electric field assisted shot blasting and ultrasonic rolling composite reinforced gear

CN122012880ACN 122012880 ACN122012880 ACN 122012880ACN-122012880-A

Abstract

The invention discloses a device and a method for compounding and strengthening a gear by pulse electric field assisted shot blasting and ultrasonic rolling, and relates to the technical field of gear strengthening; the device comprises a workpiece clamping system, a mechanical transmission system, an ultrasonic strengthening device, an electric pulse strengthening device and a shot peening strengthening device, wherein one end of the ultrasonic strengthening device is connected with the mechanical transmission system, the other end of the ultrasonic strengthening device is a rack-shaped rolling head, the rack-shaped rolling head is used for being meshed with a gear to be strengthened in an adaptive mode, the ultrasonic strengthening device is used for conducting ultrasonic rolling strengthening on the gear to be strengthened in a rotating mode, the electric pulse strengthening device is in rotary contact with the workpiece clamping system and used for conducting electric pulse strengthening on the rotating gear to be strengthened, and the shot peening strengthening device is used for conducting shot peening strengthening on the rotating gear to be strengthened. The invention can provide pulse current field assisted shot peening strengthening and ultrasonic rolling strengthening for the gear to be strengthened while rotating, thereby effectively prolonging the fatigue life of the gear.

Inventors

LIANG ZHIQIANG
CHEN ZHIBO
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 device for compounding and strengthening the gear by pulse electric field assisted shot blasting and ultrasonic rolling is characterized by comprising a workpiece clamping system, a mechanical transmission system, an ultrasonic strengthening device, an electric pulse strengthening device and a shot blasting strengthening device; The workpiece clamping system is used for clamping a gear to be reinforced and driving the gear to be reinforced to rotate; One end of the ultrasonic strengthening device is connected with the mechanical transmission system, the other end of the ultrasonic strengthening device is provided with a rack-shaped rolling head, the rack-shaped rolling head is used for being meshed with the gear to be strengthened in an adaptive manner, the mechanical transmission system can drive the ultrasonic strengthening device to feed along the length direction of the rack-shaped rolling head, and the ultrasonic strengthening device is used for carrying out ultrasonic rolling strengthening on the rotating gear to be strengthened; The electric pulse strengthening device is in rotary contact with the workpiece clamping system and is used for carrying out electric pulse strengthening on the rotating gear to be strengthened; The shot peening device is used for shot peening the rotating gear to be strengthened.
2. The apparatus for pulsed electric field assisted peening and ultrasonic rolling compound reinforcement gear according to claim 1, wherein said workpiece clamping system comprises a rotation mechanism, a chuck, and a gear shaft; one end of the chuck is connected with the rotating mechanism, and the other end of the chuck is provided with a plurality of clamping jaws for clamping one end of the gear shaft; The rotating mechanism is used for driving the chuck, the gear shaft and the gear to be reinforced to rotate.
3. The apparatus for pulsed electric field assisted peening and ultrasonic rolling composite reinforcement gear according to claim 2, wherein said mechanical transmission system comprises a post, a first feed assembly and a second feed assembly; The first feeding assembly is connected with the upright post, the moving pair of the first feeding assembly is connected with the second feeding assembly and used for driving the second feeding assembly to feed in the vertical direction, the moving pair of the second feeding assembly is connected with the ultrasonic strengthening device and used for driving the ultrasonic strengthening device to feed in the horizontal direction, and the length direction of the rack-shaped rolling head extends in the horizontal direction.
4. The device for pulse electric field assisted shot peening and ultrasonic rolling composite strengthening gear according to claim 2, wherein the electric pulse strengthening device comprises two bearing metal blocks; One end of each of the two bearing bush metal blocks is an arc-shaped groove, and the arc-shaped grooves are in adaptive rotary contact with the outer wall of the other end of the gear shaft; The other ends of the two bearing bush metal blocks are respectively connected with the positive electrode and the negative electrode of the pulse power supply.
5. The apparatus for pulsed electric field assisted peening and ultrasonic rolling composite strengthening gear according to claim 1, wherein the peening apparatus comprises a fence, a shot filtering system, and a shot conveying pipe; at least one part of the gear to be reinforced is positioned in the enclosure, the pellet conveying pipeline is used for conveying pellets, one end of the pellet conveying pipeline is communicated with the pellet filtering system, and the other end of the pellet conveying pipeline is oppositely arranged with the part of the gear to be reinforced, which stretches into the enclosure, and is used for carrying out shot peening reinforcement on the gear to be reinforced; The pellet filtering system comprises a filtering device, and the filtering device is communicated with the inside of the enclosure through a recycling pipeline and used for recycling filtering pellets.
6. The device for pulse electric field assisted shot peening and ultrasonic rolling composite strengthening gear according to claim 5, further comprising a base; The shot peening strengthening device further comprises a fan, the enclosing block is arranged on the base, a downward sunken step is arranged on the base at a position corresponding to the enclosing block, and one end of the recovery pipeline penetrates through the enclosing block and corresponds to the low point position of the step; The fan is arranged on the side wall of the enclosure and used for blowing the pellets into the recovery pipeline.
7. The apparatus for pulsed electric field assisted peening and ultrasonic rolling composite reinforcement gear according to claim 3, wherein said first and second feed assemblies each comprise a carrier plate, a screw nut assembly, a slide rail, a slide block, and a slide carriage box; The bearing plate is provided with the screw nut component and two sliding rails, the two sliding rails are symmetrically arranged on two sides of the screw nut component, and the two sliding rails are arranged in parallel with the screw nut component; The two sliding blocks are respectively connected with the corresponding sliding rails in a sliding manner, the slide carriage box is a moving pair and is fixedly connected with the two sliding blocks and nuts of the screw nut assembly, and the screw nut assembly is used for driving the slide carriage box to move.
8. The device for compounding and strengthening the gear by the pulse electric field assisted shot blasting and ultrasonic rolling according to claim 1 is characterized by further comprising a reinforcing rib, wherein the ultrasonic strengthening device comprises an ultrasonic impact head, the middle part of the rack-shaped rolling head is connected with the ultrasonic impact head, and the rack-shaped rolling head is connected with the ultrasonic impact head through the reinforcing rib to form a triangular supporting structure; The rack-shaped rolling head is made of insulating materials.
9. The device for compounding and strengthening the gear by the pulse electric field assisted shot blasting and ultrasonic rolling according to claim 3, wherein at least two gears to be strengthened are sleeved on the gear shaft in the vertical direction, and the first feeding assembly drives the rack-shaped rolling head to feed in the vertical direction so that the rack-shaped rolling head can be meshed with any gear to be strengthened; one end of the gear shaft is an insulating part, a plurality of clamping jaws of the chuck are used for clamping the insulating part, and the rotating mechanism is an index head.
10. A method for pulse electric field assisted shot blasting and ultrasonic rolling composite reinforced gear, characterized in that the device for pulse electric field assisted shot blasting and ultrasonic rolling composite reinforced gear based on any one of claims 1-9 comprises the following steps: mounting the gear to be reinforced on a workpiece clamping system; controlling a mechanical transmission system to drive an ultrasonic strengthening device to feed so that a rack-shaped rolling head is meshed with the gear to be strengthened; Controlling a workpiece clamping system to drive the gear to be reinforced to rotate, and controlling the mechanical transmission system to drive the ultrasonic reinforcing device to feed along the length direction of the rack-shaped rolling head; the method comprises the steps of carrying out shot peening on a rotating gear to be strengthened by using a shot peening device, carrying out ultrasonic rolling strengthening on the rotating gear to be strengthened by using an ultrasonic strengthening device, and selectively carrying out electric pulse strengthening on the rotating gear to be strengthened by using an electric pulse strengthening device in the shot peening and/or ultrasonic rolling strengthening process.

Description

Device and method for pulse electric field assisted shot blasting and ultrasonic rolling composite reinforced gear Technical Field The invention relates to the technical field of gear reinforcement, in particular to a device and a method for pulse electric field assisted shot blasting and ultrasonic rolling composite reinforcement of gears. Background Gears are important elements of mechanical products, and due to the advantages of high gear transmission precision, reliable service performance and the like, gear transmission systems have been widely applied to the wide industrial fields of engineering machinery, marine vessels, aerospace and the like. However, the gear is extremely easy to generate fatigue failure under the complex working conditions of high speed and heavy load, repeated irregular impact, corrosion oxidation and the like. In the gear service process, bending fatigue failure of the tooth root part, contact fatigue failure of the tooth surface part and the like frequently occur, and the premature fatigue failure of the gear restricts the improvement of the gear fatigue life, so that the service safety of equipment is seriously jeopardized. In the existing gear manufacturing process, grinding is usually the final manufacturing process, the strengthening process is mainly shot peening, and the fatigue life of the gear can be improved due to the residual compressive stress introduced by shot peening and the improvement of the surface hardness. However, the deterioration of the surface morphology and the aggravation of stress concentration due to shot peening are disadvantageous to a certain extent for further improvement of the fatigue life of gears. In view of the foregoing problems in the prior art, a device and a method for assisting the shot blasting and the ultrasonic rolling of a composite reinforced gear by using a pulsed electric field are needed by those skilled in the art. Disclosure of Invention The invention aims to provide a device and a method for pulse electric field assisted shot blasting and ultrasonic rolling composite strengthening of a gear, which are used for solving the problems in the prior art, and can provide pulse electric field assisted shot blasting strengthening and ultrasonic rolling strengthening for the gear to be strengthened while the gear to be strengthened rotates, so that the fatigue life of the gear is effectively prolonged. In order to achieve the above object, the present invention provides the following solutions: The invention provides a device for assisting in peening and ultrasonic rolling of a composite strengthening gear by a pulse electric field, which comprises a workpiece clamping system, a mechanical transmission system, an ultrasonic strengthening device, an electric pulse strengthening device and a peening strengthening device, wherein the workpiece clamping system is used for clamping a gear to be strengthened and driving the gear to be strengthened to rotate, one end of the ultrasonic strengthening device is connected with the mechanical transmission system, the other end of the ultrasonic strengthening device is a rack-shaped rolling head, the rack-shaped rolling head is used for being meshed with the gear to be strengthened in an adaptive manner, the mechanical transmission system can drive the ultrasonic strengthening device to feed along the length direction of the rack-shaped rolling head, the ultrasonic strengthening device is used for conducting ultrasonic rolling strengthening on the rotating gear to be strengthened, the electric pulse strengthening device is in rotary contact with the workpiece clamping system and is used for conducting electric pulse strengthening on the rotating gear to be strengthened, and the peening strengthening device is used for conducting peening strengthening on the rotating gear to be strengthened. In some embodiments, the workpiece clamping system comprises a rotating mechanism, a chuck and a gear shaft, wherein one end of the chuck is connected with the rotating mechanism, a plurality of clamping jaws are arranged at the other end of the chuck and used for clamping one end of the gear shaft, the gear shaft is sleeved with the gear to be reinforced, one end of the gear shaft is in insulating connection with the chuck, and the rotating mechanism is used for driving the chuck, the gear shaft and the gear to be reinforced to rotate. In some embodiments, the mechanical transmission system comprises a stand column, a first feeding assembly and a second feeding assembly, wherein the first feeding assembly is connected with the stand column, a moving pair of the first feeding assembly is connected with the second feeding assembly and used for driving the second feeding assembly to feed in the vertical direction, a moving pair of the second feeding assembly is connected with the ultrasonic strengthening device and used for driving the ultrasonic strengthening device to feed in the horizontal direction, and the l