CN-121973453-A - Laminated busbar local hot-pressing gradient forming method and hot-pressing device

Abstract

The invention discloses a laminated busbar local hot-pressing gradient forming method and a hot-pressing device, which relate to the technical field of hot-pressing forming, wherein a stamping component is used as a basic principle, a fixed cavity is formed in a lower pressing plate, a controllable elastic component is arranged outside the lower pressing plate, a temperature control component is arranged corresponding to the fixed cavity, the controllable elastic component forms a pressure interaction feedback mechanism, a unidirectional pressure feedback mechanism is arranged corresponding to the fixed cavity in the upper pressing plate, multi-frequency reciprocating differential movement of the upper pressing plate and the lower pressing plate can be realized, dynamic pressure parameters between the pressing plates and upward reaction force of a substrate are acquired in real time through the two types of pressure feedback mechanisms, the softening, bonding, compaction, shrinkage and shaping stages of the substrate are judged through data analysis, and accordingly, the multi-frequency reciprocating differential movement form of the upper pressing plate and the lower pressing plate is dynamically adjusted, and the heat source supply of the temperature control component is matched, so that the gradient adaptation process of the hot-pressing pressure and the substrate forming state is realized.

Inventors

• Zong Rongsheng

Assignees

• 宜兴市三鑫电子有限公司

Dates

Publication Date

20260505

Application Date

20260330

Claims (6)

1. 1. The laminated busbar local hot-pressing gradient hot-pressing device comprises a hydraulic power piece (1), an upper pressing plate (2), a lower pressing plate (3) and a tool frame (4), and is characterized in that the lower pressing plate (3) and the upper pressing plate (2) are in sliding connection in the vertical direction in the tool frame (4) through the hydraulic power piece (1); A fixed cavity (8) is formed in the central point area of the lower pressing plate (3) corresponding to the upper pressing plate (2), a controllable elastic component (7) is arranged in the outer area of the lower pressing plate (3) corresponding to the forming cavity (8), and temperature control components are arranged at the positions of the upper pressing plate (2) and the lower pressing plate (3) corresponding to the forming cavity (8); The controllable elastic component (7) forms a pressure interaction feedback mechanism relative to the upper pressing plate (2) and the lower pressing plate (3), and the upper pressing plate (2) and the lower pressing plate (3) perform multi-frequency reciprocating differential movement under the pressure interaction feedback mechanism through the hydraulic power piece (1).
2. 2. The laminated busbar local hot-pressing gradient hot-pressing device according to claim 1, wherein a directional limiting group (5) and an elastic limiting group (6) are respectively arranged between the upper pressing plate (2) and the lower pressing plate (3), and a unidirectional pressure feedback mechanism corresponding to a pressure interaction feedback mechanism is arranged in a position of the upper pressing plate (2) corresponding to the forming cavity (8).
3. 3. The laminated busbar local hot-pressing gradient forming method is used for the laminated busbar local hot-pressing gradient hot-pressing device according to claim 2, and is characterized in that a substrate to be processed is placed into a shaping cavity (8), a temperature control component is used for providing a heat source, the upper pressing plate (2) and the lower pressing plate (3) complete hot-pressing forming actions on the substrate, and in the hot-pressing forming actions, pressure data are acquired by a pressure interaction feedback mechanism and a unidirectional pressure feedback mechanism and are used as reference data in multi-frequency reciprocating differential movement actions.
4. 4. The method for forming the laminated busbar local hot-pressing gradient according to claim 3, wherein the upper pressing plate (2) and the lower pressing plate (3) in the multi-frequency reciprocating differential movement action comprise four movement modes of same-direction same-speed movement, same-direction differential movement, reverse differential movement and reverse constant-speed movement, the pressure interaction feedback mechanism is used for acquiring dynamic pressure parameters of the upper pressing plate (2) and the lower pressing plate (3), and the unidirectional pressure feedback mechanism is used for feeding back a reaction force generated upwards during the hot-pressing forming of the base material.
5. 5. The method for forming the laminated busbar by local hot-pressing gradient according to claim 4, wherein the forming method comprises the following steps: s1, analyzing and judging that the base material is not obviously deformed based on initial pressure data of two feedback mechanisms, controlling the upper pressing plate (2) and the lower pressing plate (3) to move in the same direction at a constant speed, continuously analyzing the pressure data change trend, and adjusting the moving speed if the data fluctuates; S2, when the pressure data are analyzed to judge that the base material begins to soften and a preliminary bonding trend appears between layers, the upper pressing plate (2) and the lower pressing plate (3) are controlled to do the same-direction differential motion, the moving speed of the pressing plate is finely adjusted according to the pressure parameter distribution, and if the reaction force of the base material rises too fast, the whole moving speed of the pressing plate is reduced; S3, analyzing the pressure data to judge that the base material is completely softened, controlling the upper pressing plate (2) and the lower pressing plate (3) to do reverse differential motion when the layers enter a bonding compaction stage, judging the internal stress state according to the reaction force change of a unidirectional pressure feedback mechanism, and adjusting the pressing plate moving parameters; S4, when analyzing the pressure data to determine that the air between the substrate layers is basically discharged and the reaction force is kept stable, controlling the upper pressing plate (2) and the lower pressing plate (3) to do reverse constant-speed movement, analyzing the uniformity of the reaction force of each area of the substrate, and finely adjusting the reciprocating amplitude and frequency of the pressing plate; and S5, after the pressure data are analyzed to judge that the whole area of the base material is uniformly compacted, the forming pressure is kept, the pressing plate is controlled to carry out reverse constant-speed reciprocating fine adjustment with extremely small amplitude, and the shrinkage state of the base material is judged according to the reaction force change of the unidirectional pressure feedback mechanism.
6. 6. The method for forming a laminated busbar by local hot-pressing gradient according to claim 5, wherein in the step S5, the temperature control assembly adjusts the temperature in cooperation with pressure feedback during the shaping process of the substrate, and residual stress in the substrate is eliminated by small reciprocating fine adjustment of the pressing plate.

Description

Laminated busbar local hot-pressing gradient forming method and hot-pressing device Technical Field The invention relates to the technical field of hot press forming, in particular to a laminated busbar local hot press gradient forming method and a hot press device. Background The laminated busbar is used for power transmission under high-current and high-voltage scenes, and is specifically prepared by taking related materials as bases and assisting a hot press molding process, wherein the laminated busbar hot press molding is a key process for determining the electrical performance, mechanical strength and long-term reliability of the laminated busbar, and the problems of poor interlayer adhesion, insulation failure, size deviation and the like are easily caused by improper process control. The key factors affecting the molding quality are hot-pressing temperature and pressure, wherein the temperature is the basic factor affecting the adhesion strength, and the pressure is the basic factor ensuring the sufficient contact between materials, but the requirement is that the higher temperature promotes the deformation of the materials to ensure the sufficient contact of the materials, but the expansion difference of the materials can exist in the heating process, otherwise, the contact degree of the materials is affected, if the thermal expansion coefficients of a conductive layer (copper/aluminum) and an insulating film (PET/PI) are not easy to generate due to improper matching, the thermal expansion coefficients should be as close as possible, and the warping, layering or adhesive layer cracking after cooling is avoided. Disclosure of Invention The invention aims to provide a local hot-pressing gradient forming method and a hot-pressing device for laminated busbar, which are possibly unstable in bonding or local deformation due to temperature/pressure difference because two key parameters of temperature and pressure are mutually related in the hot-pressing forming process of laminated busbar. The invention aims at realizing the technical scheme that the laminated busbar local hot-pressing gradient hot-pressing device comprises a hydraulic power piece, an upper pressing plate, a lower pressing plate and a tool frame, wherein the lower pressing plate and the upper pressing plate are in sliding connection in the vertical direction in the tool frame through the hydraulic power piece; a fixed cavity is formed in the area, corresponding to the central point, of the upper pressing plate, a controllable elastic component is arranged in the area, corresponding to the outer part of the forming cavity, of the lower pressing plate, and a temperature control component is arranged at the positions, corresponding to the forming cavity, of the upper pressing plate and the lower pressing plate; The controllable elastic component forms a pressure interaction feedback mechanism relative to the upper pressing plate and the lower pressing plate, and the upper pressing plate and the lower pressing plate perform multi-frequency reciprocating differential movement under the pressure interaction feedback mechanism through the hydraulic power piece. The device is further characterized in that a directional limit group and an elastic limit group are respectively arranged between the upper pressing plate and the lower pressing plate, and a unidirectional pressure feedback mechanism corresponding to the pressure interaction feedback mechanism is arranged in the position, corresponding to the forming cavity, of the upper pressing plate. A laminated busbar local hot-pressing gradient forming method is characterized in that a substrate to be processed is placed in a shaping cavity, a temperature control component is used for providing a heat source, an upper pressing plate and a lower pressing plate complete hot-pressing forming actions on the substrate, and pressure data are obtained by a pressure interaction feedback mechanism and a unidirectional pressure feedback mechanism in the hot-pressing forming actions and are used as reference data in multi-frequency reciprocating differential movement actions. The multi-frequency reciprocating differential movement mechanism is further arranged in such a way that the upper pressing plate and the lower pressing plate comprise four movement modes of same-direction same-speed movement, same-direction differential movement, reverse differential movement and reverse constant-speed movement, the pressure interaction feedback mechanism is used for acquiring dynamic pressure parameters of the upper pressing plate and the lower pressing plate, and the one-way pressure feedback mechanism is used for feeding back the upward reaction force generated during the hot press forming of the base material. The molding method further comprises the following steps: S1, analyzing and judging that the base material is not obviously deformed based on initial pressure data of two feedback mechanisms, controlling the up