US-12623975-B2 - High-temperature rolling processing method and processing device, and application of high-temperature rolling processing device

US12623975B2US 12623975 B2US12623975 B2US 12623975B2US-12623975-B2

Abstract

A high-temperature rolling machining method and processing device, and an application of the high-temperature rolling processing device, the device includes a force loading assembly, a rolling assembly, a temperature control assembly, and a carrying assembly; in the high-temperature rolling machining method, an accurate high-temperature rolling operation can be carried out on the surface of a test piece made of brittle materials such as ceramics by using the processing device, and the mechanical properties and electrical properties of the test piece after rolling treatment are remarkably improved, the thermal conductivity is remarkably reduced, and at the same time, crack initiation in the processing process is avoided.

Inventors

Chi Tan

Assignees

Peking University Nanchang Innovation Institute

Dates

Publication Date: 20260512
Application Date: 20220809
Priority Date: 20220118

Claims (15)

1 . A high-temperature rolling processing method, comprising the following steps: heating a to-be-processed test piece to a preset temperature, maintaining the preset temperature, using balls of which the hardness is greater than that of the to-be-processed test piece at the temperature, applying a preset pressure on a to-be-processed surface of the test piece, and periodically and repeatedly rolling the test piece; rolling the test piece for a preset time, and then cooling the test piece to room temperature to obtain a test piece with a residual compressive stress layer on the surface; and plastically deforming the test piece at the preset temperature without crack initiation, wherein the preset pressure and preset time are suitable for a thickness of the residual compressive stress layer to be formed on the surface of the test piece.
2 . A high-temperature rolling processing device, comprising a force loading assembly, a rolling assembly, a temperature control assembly and a carrying assembly, wherein the temperature control assembly comprises a temperature control box and a bearing platform, and the bearing platform is arranged in an inner cavity of the temperature control box; the carrying assembly comprises a carrying vehicle arranged along a horizontal direction, a transmission rod and a first motor, one end of the transmission rod is connected with a side face of the carrying vehicle, the other end of the transmission rod penetrates through a side wall of the temperature control box and then is connected with a rotating shaft of the first motor, and the first motor is used for controlling the carrying vehicle to slide along the horizontal direction; the force loading assembly is arranged along a vertical direction, the bottom of the force loading assembly penetrates through the temperature control box and then is connected with the rolling assembly, and the bottom of the rolling assembly abuts against a to-be-processed test piece on the carrying vehicle for carrying out high-temperature rolling on the to-be-processed test piece; and the high-temperature rolling processing device is used for the high-temperature rolling processing method according to claim 1 .
3 . The high-temperature rolling processing device according to claim 2 , wherein the force loading assembly comprises a force loading turntable, a first dowel bar, a force sensor, a second dowel bar, a third dowel bar, a second motor, and a water cooling assembly which are coaxially arranged; one end of the first dowel bar is connected with the center of the force loading turntable, the other end of the first dowel bar is coaxially connected with the top of the second dowel bar, and the force sensor sleeves the first dowel bar; the second dowel bar is of a tubular structure, one end of the third dowel bar penetrates through the bottom of the second dowel bar and then is connected with a rotating shaft of the second motor, and the other end of the third dowel bar penetrates through the temperature control box and then is connected with the rolling assembly; and the second motor controls the third dowel bar to drive the rolling assembly to rotate along an axial direction.
4 . The high-temperature rolling processing device according to claim 2 , wherein the rolling assembly comprises a ball fixed part and a plurality of balls, the top of the ball fixed part is connected with the end, away from the second dowel bar, of the third dowel bar, the bottom of the ball fixed part is movably embedded with the balls, the balls abut against the to-be-processed test piece on the carrying vehicle, and high-temperature rolling is carried out on the to-be-processed test piece; and during high-temperature rolling, the hardness of the ball is greater than that of the to-be-processed test piece.
5 . The high-temperature rolling processing device according to claim 3 , wherein the high-temperature rolling processing device also comprises a frame mechanism, the frame mechanism comprises a plurality of support rods, a first fixed part, a second fixed part, a temperature control box supporting piece and a base; the support rods are all arranged along the vertical direction, and the first fixed part, the second fixed part, the temperature control box supporting piece and the base are all horizontally arranged and vertically and fixedly connected with the support rods; the first fixed part is arranged between the force loading turntable and the force sensor, and the first dowel bar movably penetrates through the middle part of the first fixed part; the second fixed part is fixedly connected with the second motor, and the second dowel bar and the third dowel bar both movably penetrate through the middle part of the second fixed part; and the temperature control box supporting piece is connected with the bottom of the temperature control box and the bottom of the bearing platform.
6 . The high-temperature rolling processing device according to claim 5 , wherein the carrying assembly also comprises a motor control box and a control box supporting piece, the motor control box is electrically connected with the first motor and used for controlling the rotating speed and direction of the first motor and controlling the sliding velocity of the carrying vehicle; and the control box supporting piece is connected with the support rods and used for bearing the first motor and the motor control box.
7 . The high-temperature rolling processing device according to claim 2 , wherein the temperature control assembly also comprises a temperature control device, and the temperature control device is electrically connected with the temperature control box and used for controlling the temperature of the inner cavity of the temperature control box.
8 . The high-temperature rolling processing device according to claim 2 , wherein the high-temperature rolling processing device also comprises an atmosphere supply mechanism, the atmosphere supply mechanism comprises a gas control box and a gas storage tank, the gas control box respectively communicates with inner cavities of the gas storage tank and the temperature control box through pipelines, and the gas control box is used for controlling the export flow and flow rate of working gas in the gas storage tank.
9 . A method of using a high temperature rolling processing device, the high temperature rolling processing device comprising: a force loading assembly, a rolling assembly, a temperature control assembly and a carrying assembly, wherein the temperature control assembly comprises a temperature control box and a bearing platform, and the bearing platform is arranged in an inner cavity of the temperature control box; the carrying assembly comprises a carrying vehicle arranged along a horizontal direction, a transmission rod and a first motor, one end of the transmission rod is connected with a side face of the carrying vehicle, the other end of the transmission rod penetrates through a side wall of the temperature control box and then is connected with a rotating shaft of the first motor, and the first motor is used for controlling the carrying vehicle to slide along the horizontal direction; the force loading assembly is arranged along a vertical direction, the bottom of the force loading assembly penetrates through the temperature control box and then is connected with the rolling assembly, and the bottom of the rolling assembly abuts against a to-be-processed test piece on the carrying vehicle for carrying out high-temperature rolling on the to-be-processed test piece; and wherein the high-temperature rolling processing device is applied to surface toughening of ceramic or semiconductor materials and improvement on electrical and thermal properties of the materials.
10 . The method according to claim 9 , wherein the force loading assembly comprises a force loading turntable, a first dowel bar, a force sensor, a second dowel bar, a third dowel bar, a second motor and a water cooling assembly which are coaxially arranged; one end of the first dowel bar is connected with the center of the force loading turntable, the other end of the first dowel bar is coaxially connected with the top of the second dowel bar, and the force sensor sleeves the first dowel bar; the second dowel bar is of a tubular structure, one end of the third dowel bar penetrates through the bottom of the second dowel bar and then is connected with a rotating shaft of the second motor, and the other end of the third dowel bar penetrates through the temperature control box and then is connected with the rolling assembly; and the second motor controls the third dowel bar to drive the rolling assembly to rotate along an axial direction.
11 . The method according to claim 9 , wherein the rolling assembly comprises a ball fixed part and a plurality of balls, the top of the ball fixed part is connected with the end, away from the second dowel bar, of the third dowel bar, the bottom of the ball fixed part is movably embedded with the balls, the balls abut against the to-be-processed test piece on the carrying vehicle, and high-temperature rolling is carried out on the to-be-processed test piece; and during high-temperature rolling, the hardness of the ball is greater than that of the to-be-processed test piece.
12 . The method according to claim 10 , wherein the high-temperature rolling processing device also comprises a frame mechanism, the frame mechanism comprises a plurality of support rods, a first fixed part, a second fixed part, a temperature control box supporting piece and a base; the support rods are all arranged along the vertical direction, and the first fixed part, the second fixed part, the temperature control box supporting piece and the base are all horizontally arranged and vertically and fixedly connected with the support rods; the first fixed part is arranged between the force loading turntable and the force sensor, and the first dowel bar movably penetrates through the middle part of the first fixed part; the second fixed part is fixedly connected with the second motor, and the second dowel bar and the third dowel bar both movably penetrate through the middle part of the second fixed part; and the temperature control box supporting piece is connected with the bottom of the temperature control box and the bottom of the bearing platform.
13 . The method according to claim 12 , wherein the carrying assembly also comprises a motor control box and a control box supporting piece, the motor control box is electrically connected with the first motor and used for controlling the rotating speed and direction of the first motor and controlling the sliding velocity of the carrying vehicle; and the control box supporting piece is connected with the support rods and used for bearing the first motor and the motor control box.
14 . The method according to claim 9 , wherein the temperature control assembly also comprises a temperature control device, and the temperature control device is electrically connected with the temperature control box and used for controlling the temperature of the inner cavity of the temperature control box.
15 . The method according to claim 9 , wherein the high-temperature rolling processing device also comprises an atmosphere supply mechanism, the atmosphere supply mechanism comprises a gas control box and a gas storage tank, the gas control box respectively communicates with inner cavities of the gas storage tank and the temperature control box through pipelines, and the gas control box is used for controlling the export flow and flow rate of working gas in the gas storage tank.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This patent application is a national stage application of International Patent Application No. PCT/CN2022/111119, filed on Aug. 9, 2022, which claims the benefit and priority of Chinese Patent Application No. 202210054643.9, filed with the China National Intellectual Property Administration on Jan. 18, 2022, the disclosure of which is incorporated by reference herein in its entirety as part of the present application. TECHNICAL FIELD The present disclosure relates to the field of material processing, in particular to a high-temperature rolling processing method and processing device, and an application of the high-temperature rolling processing device. BACKGROUND At present, the toughening methods for low-toughness materials mainly include particle toughening, fiber whisker toughening, phase transformation toughening, residual stress toughening and other methods. Taking ceramic materials as an example, the fracture toughness of ceramic materials is low, and micro-cracks are easily introduced into the surface of the material during in the processing and using processes. In the using process, cracks may be produced and expanded, so that the reliability of materials is seriously reduced. In the prior art, one of the methods for mechanical modification of ceramic materials is to introduce a residual compressive stress layer on the ceramic surface through chemical treatment, heat treatment, shot peening and other technologies. The residual compressive stress layer introduced by chemical treatment is very thin, the strengthening effect on the material is limited, and other properties of the material can be influenced. Heat treatment and shot peening technology can only modify some materials. Due to the influence of process stability, new crack defects are easily introduced into the surface of the material during treatment, so that the dispersion of mechanical properties of the is greater. Therefore, for low-toughness materials, it is difficult to avoid crack initiation without changing the original materials in the existing toughening methods. Therefore, it is necessary to propose a universal process for low-toughness materials to solve the above existing problems. SUMMARY The purpose of the present disclosure is to provide a high-temperature rolling processing method and processing device, and an application of the high-temperature rolling processing device so as to solve the problem that the surface treatment effect of low-toughness materials is low in the prior art. In order to solve the technical problem, a first solution provided by the present disclosure is as follows. A high-temperature rolling processing method includes the following steps: heating a to-be-processed test piece to a preset temperature, maintaining the preset temperature, applying a preset pressure on a to-be-processed surface of the test piece, and periodically and repeatedly rolling the test piece; rolling the test piece for a preset time, and then cooling the test piece to room temperature to obtain a test piece with a residual compressive stress layer on the surface; and plastically deforming the test piece at the preset temperature without crack initiation, wherein the preset pressure and preset time are suitable for a thickness of the residual compressive stress layer to be formed on the surface of the test piece, and the preset temperature. In order to solve the technical problem, a second solution provided by the present disclosure is as follows. A high-temperature rolling machining device includes a force loading assembly, a rolling assembly, a temperature control assembly and a carrying assembly. The temperature control assembly includes a temperature control box and a bearing platform, and the bearing platform is arranged in an inner cavity of the temperature control box. The carrying assembly includes a carrying vehicle arranged along the horizontal direction, a transmission rod and a first motor, the carrying vehicle is arranged on the bearing platform, one end of the transmission rod is connected with a side face of the carrying vehicle, the other end of the transmission rod penetrates through a side wall of the temperature control box and then is connected with a rotating shaft of the first motor, and the first motor is used for controlling the carrying vehicle to slide along the horizontal direction. The force loading assembly is arranged along the vertical direction, the bottom of the force loading assembly penetrates through the temperature control box and then is connected with the rolling assembly, and the bottom of the rolling assembly abuts against a to-be-processed test piece on the carrying vehicle for carrying out high-temperature rolling on the to-be-processed test piece. The high-temperature rolling processing device is used for carrying out the high-temperature rolling processing method in the first solution. Preferably, the force loading assembly includes a force loading