CN-121402500-B - Elliptical ultrasonic-assisted spinning forming device and method

CN121402500BCN 121402500 BCN121402500 BCN 121402500BCN-121402500-B

Abstract

The invention discloses an elliptical ultrasonic-assisted spinning forming device and a method, wherein a workpiece holder of the device drives a workpiece to rotate around a workpiece central line, a spinning wheel is freely rotatably arranged on a tool rest, the tool rest is arranged on a feed driving mechanism, the feed driving mechanism is matched with the rotation of the workpiece holder to enable the spinning wheel to roll to all sides of the workpiece, one end of a first amplitude transformer is connected with the tool rest, the other end of the first amplitude transformer is connected with a first transducer, a second amplitude transformer forms an included angle with the extending direction of the first amplitude transformer, one end of the second amplitude transformer is connected with the tool rest, the other end of the second amplitude transformer is connected with a second transducer, an ultrasonic generator is connected with the first transducer and the second transducer, and the tool rest is driven by the first amplitude transformer and the second amplitude transformer to drive the spinning wheel to perform ultrasonic vibration in the directions perpendicular to and parallel to the workpiece central line. By reasonably setting the ultrasonic phase and amplitude, the impact on the surface of the workpiece along the vertical direction and the tangential direction of the surface of the workpiece can be achieved, and the quality of the spinning workpiece is improved.

Inventors

JIANG QINGSHAN
RAN TONG
LIN PEIHAN
LAI YONGQING
CHEN SHIQI
XU ZHILONG
CHEN XIUYU

Assignees

集美大学

Dates

Publication Date: 20260505
Application Date: 20251229

Claims (4)

1. An elliptical ultrasonic assisted spin forming apparatus comprising: The workpiece clamp (1) is used for clamping and fixing a workpiece (2) and can rotate to drive the workpiece (2) to rotate around a workpiece center line (6); The rotating wheel (3) is positioned beside the workpiece clamp (1) and is arranged on the tool rest (4) in a free rotation way; The tool rest (4) and the feed driving mechanism (5) are characterized in that the tool rest (4) is arranged on the feed driving mechanism (5), the feed driving mechanism (5) can drive the tool rest (4) to move in parallel and perpendicular directions along a workpiece center line (6), and the tool rest (4) is matched with the rotation of the workpiece clamp (1) to enable the spinning wheel (3) to roll the side surface of the workpiece (2); The ultrasonic vibration assembly comprises a first amplitude transformer (7) and a second amplitude transformer (9), wherein the first amplitude transformer (7) and the second amplitude transformer (9) are arranged at an included angle, a uniform end is connected with a tool rest (4), the ultrasonic vibration assembly further comprises a first energy converter (8) and a second energy converter (10), the first energy converter (8) is connected with the other end of the first amplitude transformer (7), the second energy converter (10) is connected with the other end of the second amplitude transformer (9), and the first energy converter (8) and the second energy converter (10) are connected with an ultrasonic generator (11); the ultrasonic generator (11) is used for driving the rotating wheel (3) to perform ultrasonic vibration perpendicular to the center line (6) of the workpiece and perform ultrasonic vibration parallel to the center line (6) of the workpiece, a phase difference and/or an amplitude difference are arranged between the ultrasonic vibration and the ultrasonic vibration, a real-time feedback control system is adopted for acquiring local curvature data of the surface of the workpiece, and the phase difference is dynamically adjusted so that the rotating wheel (3) performs periodic vibration in an elliptical or linear track in a circular or set direction; According to the surface profile of a workpiece (2), an ultrasonic generator (11) is regulated and controlled in real time, a first amplitude transformer (7) and a second amplitude transformer (9) are driven to vibrate, in the first stage, a rotating wheel (3) impacts the surface of the workpiece (2) along the tangential direction, the tangential impact simultaneously achieves two effects, namely, firstly, the surface of the workpiece is subjected to preliminary modification, secondly, shearing stress is generated, materials are extruded along the tangential direction, surface metal is promoted to flow in the forming direction, so that the subsequent forming performance of the materials is improved, in the second stage, the impact direction of the rotating wheel (3) is regulated, the rotating wheel (3) impacts along the normal direction of the workpiece (2), the normal impact of the stage serves as a finishing means, the surface treated in the first stage is subjected to secondary spinning modification, the impact energy of the stage is concentrated on the surface of the workpiece, the influence on the macroscopic fluidity and the integral deformation of the workpiece is small, the surface quality and the surface quality are improved, and the roughness is reduced, and the smoothness is improved.
2. The elliptical ultrasonic-assisted spin forming device of claim 1, wherein the rotary shaft of the spin wheel (3) is parallel to the workpiece center line (6), the first amplitude transformer (7) is perpendicular to the workpiece center line (6), the second amplitude transformer is parallel to the workpiece center line (6), the elliptical ultrasonic-assisted spin forming device further comprises a frame (12), the feed drive mechanism (5) comprises a first screw sliding table assembly (13) and a second screw sliding table assembly (14), the first screw sliding table assembly (13) comprises a first screw (15) rotatably mounted on the frame (12) and parallel to the workpiece center line (6), and a first sliding table (16) slidably mounted on the frame (12) and in threaded connection with the first screw (15), the second screw sliding table assembly (14) comprises a second screw (17) rotatably mounted on the first sliding table (16) and in threaded connection with the second screw (17), and the tool rest (4) is mounted on the second sliding table (18).
3. The elliptical ultrasonic assisted spin forming apparatus of claim 2, wherein the workpiece holder (1) is rotatably mounted to the frame (12), and the tool holder (4) is mounted to the second slide (18) by a height adjustment mechanism (19) capable of driving the tool holder (4) to linearly displace in a direction perpendicular to the sliding directions of the first slide (16) and the second slide (18).
4. The elliptical ultrasonic-assisted spin forming apparatus of claim 1, wherein the outer ring portion of the spin wheel (3) contacting the workpiece (2) has a circular cross section, and further comprising a controller coupled to the ultrasonic generator (11) for controlling the ultrasonic vibration in real time during the spinning process to cause the spin wheel (3) to make vibratory contact with a travel tangential to the preformed surface of the workpiece (2).

Description

Elliptical ultrasonic-assisted spinning forming device and method Technical Field The invention relates to the technical field of workpiece plastic forming, in particular to an elliptical ultrasonic assisted spinning forming device and method. Background The spinning forming process is a plastic forming process for manufacturing hollow rotary parts, and utilizes a workpiece clamp to drive a workpiece blank to rotate, and utilizes a spinning wheel to roll the surface of the workpiece blank so as to gradually press the workpiece blank into a required shape. The surface quality of the current spinning forming workpiece is still to be improved, and the problem of how to provide a spinning forming device to spin a workpiece with higher surface quality is to be solved. Disclosure of Invention The invention aims to provide an elliptical ultrasonic assisted spinning forming device and an elliptical ultrasonic assisted spinning forming method, which solve the technical problem of how to provide a spinning forming device which is used for producing a workpiece with higher surface quality through spinning. To achieve the above object, the solution of the present invention is: An elliptical ultrasonic assisted spin forming apparatus comprising: the workpiece clamp is used for clamping and fixing a workpiece and can rotate to drive the workpiece to rotate around the center line of the workpiece; The rotating wheel is positioned beside the workpiece clamp and is arranged on the tool rest in a free rotation way; The tool rest and the feed driving mechanism are arranged on the feed driving mechanism, and the feed driving mechanism can drive the tool rest to move in parallel and perpendicular directions along the center line of the workpiece and rotate in cooperation with the workpiece clamp to enable the spinning roller to roll the side surface of the workpiece; the ultrasonic vibration assembly comprises a first amplitude transformer and a second amplitude transformer, wherein the first amplitude transformer and the second amplitude transformer are arranged at an included angle, the uniform end of the first amplitude transformer is connected with the tool rest, the ultrasonic vibration assembly further comprises a first energy converter and a second energy converter, the first energy converter is connected with the other end of the first amplitude transformer, the second energy converter is connected with the other end of the second amplitude transformer, and the first energy converter and the second energy converter are connected with an ultrasonic generator; The ultrasonic generator is used for driving the rotating wheel to perform ultrasonic vibration perpendicular to the center line of the workpiece and perform ultrasonic vibration parallel to the center line of the workpiece, a phase difference and/or an amplitude difference are arranged between the rotating wheel and the ultrasonic vibration, a real-time feedback control system is adopted to acquire local curvature data of the surface of the workpiece, and the phase difference is dynamically adjusted so that the rotating wheel periodically vibrates in a circular or elliptical or linear track with a set direction. The tool rest is arranged on the second sliding table, the first screw rod sliding table assembly comprises a first screw rod which is rotatably arranged on the frame and is parallel to the center line of the workpiece, a first sliding table which is slidably arranged on the frame and is in threaded connection with the first screw rod, the second screw rod sliding table assembly comprises a second screw rod which is rotatably arranged on the first sliding table and is perpendicular to the center line of the workpiece, and a second sliding table which is slidably arranged on the first sliding table and is in threaded connection with the second screw rod, and the tool rest is arranged on the second sliding table. The tool rest is arranged on the second sliding table through a height adjusting mechanism, and the mechanism can drive the tool rest to linearly displace along the sliding direction perpendicular to the first sliding table and the second sliding table. The rotary pressing wheel is connected with the ultrasonic generator, and is used for controlling ultrasonic vibration in real time in the spinning process, so that the rotary pressing wheel is in vibration contact with the preformed surface of the workpiece in a tangential direction. The ultrasonic assisted spinning forming method adopts the elliptical ultrasonic assisted spinning forming device, a real-time feedback control system is adopted to acquire local curvature data of the surface of a workpiece, an ultrasonic generator is regulated and controlled in real time according to the surface profile of the workpiece, a first amplitude transformer and a second amplitude transformer are driven to vibrate, a spinning wheel impacts the surface of the workpiece in the tangential direction of the workpiec