CN-122007591-A - Thermocompression bonding apparatus and thermocompression bonding control method

CN122007591ACN 122007591 ACN122007591 ACN 122007591ACN-122007591-A

Abstract

The application provides a hot-press welding device and a hot-press welding control method, which are applied to the technical field of strip welding. The device comprises a shell, a hot-press welding assembly, a hot-press welding component and a pressing component, wherein the hot-press welding assembly comprises a hot-press welding component and a pressing component which are oppositely arranged, the hot-press welding component comprises a welding plate, a heating element, a temperature sensor and a pressure sensor, the welding plate is provided with a first welding surface, the heating element is arranged on one side of the welding plate, which is away from the first welding surface, and is in contact with the welding plate, and the pressing component is provided with a second welding surface which is oppositely arranged with the first welding surface. The pressure execution assembly is positioned in the shell and comprises a motor and a transmission assembly, the output end of the transmission assembly is fixedly connected with the hot-press welding part, and the first welding surface is driven to linearly move along the compression joint direction so as to clamp the strip joint. The controller is electrically connected with the motor, the heating element, the temperature sensor and the pressure sensor, controls the motor to adjust clamping pressure according to preset technological parameters and actual parameters acquired by the sensor, and controls heating power of the heating element.

Inventors

LIU QUANYUE
DAI YINMING
HUANG RENJIE
LIU TONG
CHENG JUNSHENG
LIU JIANHUA
WANG QIULIANG

Assignees

中国科学院电工研究所

Dates

Publication Date: 20260512
Application Date: 20260130

Claims (11)

1. A thermocompression bonding apparatus, comprising: A housing; The hot press welding assembly is arranged outside the shell and comprises a hot press welding part and an opposite pressing part which are oppositely arranged, wherein the hot press welding part comprises a welding plate, a heating element, a temperature sensor and a pressure sensor, the welding plate is provided with a first welding surface, the heating element is arranged on one side of the welding plate, which is away from the first welding surface, and is in contact with the welding plate, the opposite pressing part is provided with a second welding surface which is opposite to the first welding surface, a strip joint is arranged between the first welding surface and the second welding surface, the temperature sensor is used for detecting the actual temperature of the welding plate, and the pressure sensor is used for detecting the actual clamping pressure between the first welding surface and the second welding surface; the pressure executing assembly is accommodated in the shell and comprises a motor and a transmission assembly driven by the motor, wherein the output end of the transmission assembly is fixedly connected with the hot-press welding component, and the first welding surface of the hot-press welding component is driven to linearly move along the compression joint direction pointing to the second welding surface by the movement of the transmission assembly; And the controller is electrically connected with the motor, the heating element, the temperature sensor and the pressure sensor and is used for controlling the motor to adjust the clamping pressure and controlling the heating power of the heating element according to preset technological parameters and actual parameters acquired by the temperature sensor and the pressure sensor.
2. The apparatus of claim 1, wherein the thermocompression bonding component further comprises a base plate and an insulating pad disposed between the heating element and the base plate, and wherein the output end of the transmission assembly is fixedly connected to the base plate.
3. The apparatus of claim 1, wherein the drive assembly is a screw drive assembly for converting rotational movement of the motor into linear movement of the thermocompression bonding component in the crimping direction.
4. The apparatus of claim 1, wherein the pressure-executing assembly further comprises a decelerator disposed between the motor and the transmission assembly for reducing an output rotational speed of the motor and increasing an output torque.
5. The apparatus of claim 1, further comprising a power drive assembly, the controller being electrically connected to the heating element through the power drive assembly to control heating power of the heating element.
6. The apparatus of claim 1, wherein the temperature sensor is disposed within the weld plate proximate the first weld face for detecting an actual temperature of the weld plate.
7. The apparatus of claim 2, wherein the pressure sensor is disposed between the heating element and the insulating liner.
8. A thermocompression bonding control method using the thermocompression bonding apparatus of claim 1, comprising: Acquiring preset technological parameters; starting welding based on the preset technological parameters, and acquiring actual parameters acquired by the temperature sensor and the pressure sensor in the welding process; Based on the comparison of the preset process parameters and the acquired actual parameters, the motor is controlled to adjust the clamping pressure and control the heating power of the heating element.
9. The method of claim 8, wherein the preset process parameters include a target welding temperature, a target welding pressure, an intermediate temperature, an intermediate pressure, and a welding period, the welding period divided into a preheating phase, a melting phase, and a holding phase, the controlling the motor to adjust the clamping pressure and controlling the heating power of the heating element based on a comparison of the preset process parameters with the collected actual parameters comprising: Controlling the heating element to heat the welding plate in a preheating stage, heating the welding plate to the intermediate temperature, and controlling the motor to increase the clamping pressure to the intermediate pressure; Controlling the heating element to heat the welding plate in the duration of the melting stage, heating the welding plate to the target welding temperature, and controlling the motor to increase the clamping pressure to the target welding pressure; and controlling the heating element to heat the welding plate in the duration of the heat preservation stage, so that the welding plate maintains the target welding temperature, and controlling the clamping pressure to maintain the target welding pressure.
10. The method of claim 9, wherein the clamping pressure increases in a linear trend from zero to the intermediate pressure over a duration of the preheating phase and from the intermediate pressure to the target welding pressure over a preset duration of the melting phase in a preset trend.
11. The method of claim 9, wherein the predetermined process parameters further comprise a first rate of rise of the preheating stage and a second rate of rise of the melting stage, wherein the heating element is controlled to rise at the first rate of rise for a predetermined duration of the preheating stage and wherein the heating element is controlled to rise at the second rate of rise for a predetermined duration of the melting stage.

Description

Thermocompression bonding apparatus and thermocompression bonding control method Technical Field The application relates to the technical field of strip welding, in particular to a hot-press welding device and a hot-press welding control method. Background With the continuous expansion of the scale of devices such as high-temperature superconducting magnets, the length of a single superconducting tape cannot meet the winding requirement of a single large-sized coil, and a plurality of tapes must be reliably connected by welding. The performance of the welded joint thus directly determines the economic viability and operational stability of the entire superconducting device. Currently, an offline hot-press welding device widely used in the prior art is usually a table-type or fixed-type device, and hot-press welding is performed on a lapped joint under preset static parameters through a fixed heating plate and a pressure mechanism. However, the prior art mainly has the following problems that firstly, the controllable stability of the joint resistance is insufficient, the fluctuation of the resistance value is large, the consistency is poor, the low-resistance joint with the nano ohm level is difficult to obtain stably, the overall performance of the superconducting device is influenced, secondly, the risk of secondary damage in the winding process cannot be avoided, when a coil is wound on a strip after offline welding, the joint part of the strip passes through a winding machine roller again, the brittle ceramic superconducting layer of the strip is extremely easy to generate microcrack or interface damage due to tension, and the contact resistance is increased sharply or even fails. Therefore, there is a strong need in the art for a solution that overcomes the above drawbacks and enables high quality superconducting joint welding. Disclosure of Invention In view of the above, embodiments of the present application provide a thermocompression bonding apparatus and a thermocompression bonding control method. According to a first aspect of the application, a thermocompression bonding device is provided, which comprises a shell, a thermocompression bonding assembly, a pressure executing assembly and a controller, wherein the thermocompression bonding assembly is arranged outside the shell and comprises a thermocompression bonding part and an opposite compacting part which are oppositely arranged, the thermocompression bonding part comprises a bonding plate, a heating element, a temperature sensor and a pressure sensor, the bonding plate is provided with a first bonding surface, the heating element is arranged on one side of the bonding plate, which is away from the first bonding surface, and is in contact with the bonding plate, the opposite compacting part is provided with a second bonding surface which is opposite to the first bonding surface, a strip joint is arranged between the first bonding surface and the second bonding surface, the temperature sensor is used for detecting the actual temperature of the bonding plate, the pressure sensor is used for detecting the actual clamping pressure between the first bonding surface and the second bonding surface, the pressure executing assembly is accommodated inside the shell and comprises a motor and a transmission assembly driven by the motor, the output end of the transmission assembly is fixedly connected with the thermocompression bonding part, the first bonding surface of the thermocompression bonding part is driven by the movement of the transmission assembly to move in a compression bonding direction pointing to the second bonding surface, the controller is electrically connected with the motor, the heating element, the temperature sensor and the pressure sensor is electrically connected with the motor and the pressure sensor. According to an embodiment of the application, the thermocompression bonding component further comprises a base plate and an insulating pad, the insulating pad is disposed between the heating element and the base plate, and an output end of the transmission assembly is fixedly connected with the base plate. According to an embodiment of the application, the transmission assembly is a screw transmission assembly for converting a rotational movement of the motor into a linear movement of the thermocompression bonding component in the crimping direction. According to an embodiment of the application, the pressure executing assembly further comprises a speed reducer arranged between the motor and the transmission assembly for reducing the output rotation speed of the motor and increasing the output torque. According to an embodiment of the application, the thermocompression bonding apparatus further comprises a power driving assembly, and the controller is electrically connected with the heating element through the power driving assembly to control the heating power of the heating element. According to an embodiment of the application,