Adjustable heating device and compounding apparatus for composite electrical contact material

Abstract

The utility model discloses a kind of adjustable heating device for composite electric contact material, and heating device includes rack and heating furnace;Partition heating pipe for being used to supply belt material to pass is replaced or alternatively inserted in heating cavity;Partition heating pipe inner cavity is not communicated with heating cavity space, and heating cavity and / or partition heating pipe are separately independently ventilated into protective atmosphere;Composite equipment includes belt material unwinding device, material polishing device, heating device, rolling cooling device, belt material winding device sequentially arranged along the direction of transmission of belt material to be compounded;The application adopts variable protective atmosphere structure of insertable partition heating pipe, flexible construction of heating interval is realized, just replace different types or specifications of partition heating pipe, heating and atmosphere protection adjustment under different materials or process conditions can be satisfied;Not limited to the specific heating source or specific setting of heating furnace, without changing the overall structure of heating furnace, improve the adaptability and flexibility of composite equipment in multi-process scene.

Description

Technical Field

[0001] This utility model relates to the field of solder metal composite strip preparation technology, and in particular to a variable atmosphere adjustable heating device and composite equipment for composite electrical contact materials. Background Technology

[0002] Currently, with the development of the electronics, electrical, and precision machinery industries, composite strips are increasingly used in electrical contact elements, low-temperature composite elements, and dissimilar metal structural components. For example, contact materials typically use silver-nickel, silver, or silver-tin oxide as the contact layer, copper or copper alloys as the intermediate conductor layer, and iron or iron alloys as the underlying support, achieving excellent conductivity, weldability, and cost control. Traditional electrical contacts are mostly regular in shape, and their manufacturing processes are relatively simple. However, with the accelerating trend towards miniaturization, lightweighting, and high performance in electrical appliances, irregularly shaped contacts are gradually becoming one of the mainstream developments in the industry.

[0003] Irregularly shaped contacts are typically non-standard geometries, such as those with steps, varying thicknesses, or special edge structures, designed to meet the needs of electrical components with limited installation space and optimized performance. These contacts often employ multi-layered composite structures, such as silver-nickel / copper / iron, silver-tin oxide / copper / iron, or silver-tin / silver-based solder / copper-based solder, to balance conductivity, wear resistance, weldability, and cost control. However, due to their irregular shapes and complex layers, irregularly shaped contacts are prone to warping, misalignment, and edge damage during rolling, heating, and winding, placing higher demands on composite processing equipment.

[0004] Existing composite equipment generally employs a uniform heating method in the heating stage, i.e., uniformly heating the materials using resistance furnaces, tube furnaces, or induction heating. While this method is relatively simple in structure, it has significant drawbacks in the composite processing of multiple different metal materials. First, different metal materials (such as silver-nickel, copper, iron, solder, etc.) have significantly different thermophysical properties, including varying thermal conductivity, specific heat capacity, and oxidation sensitivity. If a single heating mode is used, it is highly likely that some strips will be underheated or overheated, resulting in abnormal microstructure or poor interfacial bonding. Second, the uniform heating method often fails to establish a stable temperature gradient and controllable heating rate during the heating process. This is especially prone to uneven temperature control when there are significant differences in strip thickness, ultimately directly affecting the composite quality and product performance.

[0005] In recent years, some research and equipment have begun to explore zoned or multi-segment heating methods. For example, by dividing a heating furnace into multiple heating zones and setting different temperatures for each zone, a degree of differentiated heating can be achieved. For instance, Chinese invention patent application publication number CN106256453A proposes setting up independent heating spaces within the furnace to achieve zoned temperature control. However, this still cannot achieve differentiated adjustment of multiple protective atmospheres within the same composite process, and it relies on complex electrical control systems or redundant heating devices, resulting in high energy consumption, high cost, and complex maintenance.

[0006] Therefore, current technology lacks a heating structure capable of achieving personalized temperature response, differentiated heating control, and zoned protective atmosphere adjustment for composite strips of different materials within the same heating system. Further research and development are needed to address the problems existing in the current technology. Utility Model Content

[0007] Therefore, in order to solve the problems existing in the prior art, one of the objectives of this utility model is to provide an adjustable heating device for composite electrical contact materials, so as to realize differentiated temperature control and adjustment of different protective atmospheres in different areas.

[0008] The second objective of this invention is to provide a composite device including the adjustable heating device for composite electrical contact materials.

[0009] To achieve one of the above objectives, this utility model provides the following technical solution:

[0010] An adjustable heating device for composite electrical contact materials includes a frame disposed on the conveying path of the strip to be composited and a heating furnace disposed on the frame; the heating furnace is provided with a heating chamber and heated by a heating device; a partitioned heating tube for the strip to pass through is replaceably or selectively inserted into the heating chamber; the inner cavity of the partitioned heating tube is not in communication with the space of the heating chamber, and the heating chamber and / or the partitioned heating tube are independently vented to a protective atmosphere; the partitioned heating tube extends along the conveying direction of the strip and passes through and is fixed in the heating chamber, and the ends of the heating chamber and the partitioned heating tube are provided with gas inlets for venting the protective atmosphere.

[0011] Furthermore, the heating chamber is provided with a partitioned heating tube, the two ends of which extend to the outside of the heating chamber and are not connected to the heating chamber space. The gas inlet is connected to an external protective atmosphere source through a pipeline.

[0012] Furthermore, the partitioned heating tube has a single-layer tube wall structure, and the wall thickness of the partitioned heating tube is 2-10mm.

[0013] Furthermore, the partitioned heating tube has a double-walled structure, with an interlayer for coolant to pass through between the outer and inner walls of the partitioned heating tube, the interlayer spacing being 2-10mm; the end of the partitioned heating tube is provided with a coolant inlet communicating with the interlayer; the coolant inlet is connected to an external circulating cooling device through a pipeline.

[0014] Furthermore, the heating chamber is provided with two or more partitioned heating tubes, which are inserted and fixed at intervals.

[0015] Furthermore, the wall thickness or the interlayer spacing between the outer and inner layers of each of the partitioned heating tubes is different.

[0016] Furthermore, the cross-sectional shape of the partitioned heating tube can be any one of square, circular, or elliptical.

[0017] To achieve the second objective mentioned above, this utility model provides the following technical solution:

[0018] A composite equipment including the aforementioned adjustable heating device for composite electrical contact materials includes a strip unwinding device, a material grinding device, a rolling cooling device, and a strip winding device arranged sequentially along the conveying direction of the strip to be composited; the adjustable heating device is located between the material grinding device and the rolling cooling device.

[0019] The strip unwinding device includes an unwinding cabinet and unwinding reels spaced apart on the unwinding cabinet. The unwinding reels are used to wind and unwind the strip to be laminated under power drive.

[0020] The material grinding device includes a grinding cabinet and several grinding rollers arranged alternately on the grinding cabinet for surface grinding of the composite strip to be ground;

[0021] The rolling cooling device includes a roll group and a cooling circulation device connected to the roll group and used to cool the rolled strip.

[0022] The strip winding device includes a winding cabinet and a winding reel rotatably mounted on the winding cabinet; the winding reel is used to wind the finished composite strip under power drive.

[0023] Furthermore, the rolling cooling device includes a roll mounting base; the roll group includes an upper roll and a lower roll arranged at intervals, and a synchronous gear is axially connected to the same end of the upper roll and the lower roll, and the two synchronous gears are meshed together; the cooling circulation device includes a circulating water tank with an inlet and an outlet, and the inlet and outlet are respectively connected to the upper roll and the lower roll through circulation pipes.

[0024] A paper feeding device is provided between the rolling cooling device and the strip winding device; the paper feeding device includes a paper feeding tray and a paper feeding drive mechanism; the paper feeding drive mechanism is set synchronously with the strip winding device.

[0025] Furthermore, the strip winding device includes a material shortage sensing wheel and a material shortage braking assembly; the material shortage sensing wheel is arranged on the finished strip winding path to contact and sense the strip; the material shortage braking assembly includes a clamping member that laterally presses the surface of the finished strip on the winding reel and a cylinder that drives the clamping member to move closer to or away from the finished strip.

[0026] Furthermore, guide wheel sets are respectively provided between the strip unwinding device and the material grinding device, and between the rolling cooling device and the strip winding device; the guide wheel set includes guide wheels and mounting plates for mounting guide wheels; the mounting plate is provided with strip-shaped adjustment holes; the guide wheels are fixed at different positions of the strip-shaped adjustment holes by locking members to realize the position adjustment of the guide wheels.

[0027] Furthermore, the material grinding device is provided with straightening and leveling devices on both the front and rear sides; the straightening and leveling devices include multiple straightening rollers, the axes of which are distributed at intervals on the same horizontal straight line, for guiding and straightening the strip material before it enters the grinding station and after it leaves the grinding station.

[0028] Compared with the prior art, the beneficial effects of this utility model are at least in the following aspects:

[0029] 1. This utility model improves the heating device by employing an insertable partitioned heating tube structure, which can be either a single-layer or double-layer tube wall structure. In the double-layer structure, a sandwich layer is provided between the inner and outer tube walls for cooling fluid circulation. Users can select partitioned heating tubes of different materials, wall thicknesses, or cross-sectional shapes, or use different coolants and set different flow rates, depending on the material, thickness, and target process requirements of the strip. When process adjustments or strip replacements are required, the switch can be completed without altering the main structure of the heating furnace or the arrangement of the heating source, significantly shortening the production adjustment cycle and improving the equipment's versatility and adaptability. This not only ensures the uniformity and controllability of strip heating during the lamination process but also enhances the overall production line's flexibility and economy.

[0030] 2. Furthermore, the design of pluggable zoned heating tubes enables flexible construction of heating zones. Simply replacing different types or specifications of zoned heating tubes allows for heating adjustments to meet varying material or process conditions. In addition, the replaceability of the zoned heating tubes allows for more flexible selection of the heating source type or power, not limited to specific heating sources or settings of the furnace. It does not require altering the overall structure of the furnace, maintaining a uniform temperature throughout the heating chamber. Heating adjustments for different strips can be achieved by adjusting the wall thickness, introducing different circulating coolants into the interlayer, or adjusting the coolant flow rate and temperature. This significantly improves the adaptability and flexibility of the composite equipment in various process scenarios, reducing equipment adjustment and modification costs.

[0031] 3. This utility model allows for the independent introduction of different protective atmospheres into each heating channel formed by different partitioned heating tubes, achieving targeted protection. For example, during the composite process, argon gas can be introduced into the inner tube of material A to prevent high-temperature oxidation of silver and silver tin oxide. Simultaneously, ammonia decomposition gas is introduced into the overall heating chamber to provide reduction protection for copper-based and iron-based strips and silver-based and copper-based solders. This allows different strips to be heated in different protective environments within the same heating chamber at the same temperature, with flexible atmosphere switching to meet the needs of various composite material combinations, significantly improving the cleanliness and bonding strength of the composite interface. Consequently, the conductivity, arc resistance, weldability, and mechanical strength of the composite finished strip are comprehensively improved, resulting in more stable product performance, longer lifespan, and meeting the stringent requirements of high-end electrical switches, relay contacts, and other automated applications. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the adjustable heating device for composite electrical contact materials according to Embodiment 1 of this utility model;

[0033] Figure 2 This is a schematic diagram of the assembly state of the partitioned heating tube with a single-layer tube wall structure in the heating cavity of the adjustable heating device for composite electrical contact materials according to Embodiment 1 of this utility model;

[0034] Figure 3 This is a schematic diagram of the assembly state of the partitioned heating tube with a double-wall structure in the heating cavity of the adjustable heating device for composite electrical contact materials according to Embodiment 1 of this utility model;

[0035] Figure 4 This is a schematic diagram of the radial structure of the partitioned heating tube distribution of the adjustable heating device for composite electrical contact materials according to Embodiment 1 of this utility model.

[0036] Figure 5 This is a schematic diagram of the radial structure of another distribution state of the partitioned heating tubes in the adjustable heating device for composite electrical contact materials according to Embodiment 1 of this utility model;

[0037] Figure 6 This is a schematic diagram of the overall structure of the composite equipment used in the adjustable heating device for composite electrical contact materials according to Embodiment 2 of this utility model.

[0038] Figure 7 for Figure 6 Enlarged schematic diagram of the local structure at point D;

[0039] Figure 8 for Figure 6 Enlarged schematic diagram of the local structure at point E;

[0040] Figure 9 for Figure 6 Enlarged schematic diagram of the local structure at point F;

[0041] Figure 10 This is a partial structural diagram of the rolling cooling device of the composite equipment used in the application of the adjustable heating device for composite electrical contact materials, according to Embodiment 2 of this utility model.

[0042] In the picture:

[0043] 10. Adjustable heating device;

[0044] 1. Frame; 2. Heating furnace; 21. Heating chamber; 211. Gas inlet; 3. Zoned heating tube; 31. Gas inlet; 32. Outer tube wall; 33. Inner tube wall; 34. Coolant inlet; L. Interlayer spacing;

[0045] 20. Composite equipment;

[0046] 201. Strip uncoiling device; 2011. Uncoiling cabinet; 2012. Uncoiling reel; 202. Material grinding device; 2021. Grinding cabinet; 2022. Grinding roll; 203. Rolling cooling device; 2031. Roll assembly; 20311. Upper roll; 20312. Lower roll; 2032. Cooling circulation device; 20321. Circulating water tank; 20322. Circulation pipe; 2033. Roll mounting base; 2034. Synchronizing gear; 204. Strip winding device; 2041, winding cabinet; 2042, winding reel; 2043, material shortage sensing wheel; 2044, material shortage braking assembly; 20441, clamping component; 20442, cylinder; 205, paper feeding device; 2051, paper release tray; 2052, paper feeding drive mechanism; 206, guide wheel assembly; 2061, guide wheel; 2062, mounting plate; 20621, strip adjustment hole; 207, straightening device; 2071, straightening roller. Detailed Implementation

[0047] To facilitate understanding of this utility model, the technical solution and advantages of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The specific structure and features of this utility model are illustrated by way of example and should not constitute any limitation on this utility model. Furthermore, any of the technical features mentioned below (including implicit or disclosed features), as well as any technical features directly shown or implied in the figures, can be arbitrarily combined or deleted among these technical features to form other embodiments that may not be directly or indirectly mentioned in this utility model. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0048] In the description of this utility model, unless otherwise stated, all components used are conventional components in the prior art.

[0049] Example 1

[0050] like Figure 1-5 As shown, this embodiment 1 provides an adjustable heating device 10 for composite electrical contact materials. In this embodiment, the composite electrical contact material refers to an irregularly shaped composite electrical contact material.

[0051] For example, the strip to be composited includes two or more materials; taking three composite strips as an example, the strips may include: Strip A: one or more silver alloys such as silver-nickel, silver, and silver-tin oxide, as the conductive surface material; Strip B: one or more copper, iron, and gold, as the intermediate layer or conductor substrate material; Strip C: other metallic materials such as iron-based, copper-based, or silver-based solder. The composite strip is used to manufacture electrical contact materials to improve the conductivity, arc resistance, weldability, and mechanical strength of electrical switch and relay contacts.

[0052] Specifically, it includes a frame 1 set on the conveying path of the strip to be composited and a heating furnace 2 set on the frame 1; the heating furnace 2 is provided with a heating chamber 21 and is heated by a heating device; it should be noted that the heating furnace can be heated by a resistance heating device of the prior art, and its setting method and working principle can refer to the prior art.

[0053] The heating chamber 21 is optionally or replaceably equipped with a partitioned heating tube 3 for the strip to pass through. The inner cavity of the partitioned heating tube 3 is not in communication with the space of the heating chamber 21, and the heating chamber 21 and / or the partitioned heating tube 3 are each independently supplied with a protective atmosphere. The partitioned heating tube 3 extends along the strip conveying direction and is fixedly inserted into the heating chamber 21. The end of the heating chamber 21 is provided with a gas inlet 211 for introducing the protective atmosphere, and the end of the partitioned heating tube 3 is provided with a gas inlet 31 for introducing the protective atmosphere. In this embodiment, the partitioned heating tube for the strip to pass through is optionally or replaceably inserted into the heating chamber. The inner cavity of the partitioned heating tube is separated from the space of the heating chamber by a sealing element, which can effectively avoid mutual interference between the atmospheres of different heating zones, thereby realizing individual control of the atmosphere environment of each heating zone.

[0054] Optionally, the heating chamber 21 is provided with a partitioned heating tube 3, with both ends of the partitioned heating tube 3 extending to the outside of the heating chamber 21 and not communicating with the space of the heating chamber 21. The gas inlet 31 is connected to an external protective atmosphere source through a pipeline. Generally, when the material heating temperature and heating temperature conditions are the same, the strip can be continuously heated in the same heating tube cavity, simplifying the atmosphere control system and meeting the requirements for uniform protection and overall heating in some process applications.

[0055] For example, the cross-sectional shape of the partitioned heating tube is any one of square, circular, or elliptical; in other optional embodiments, it may also be other cross-sectional shapes besides those mentioned above.

[0056] like Figure 2 As shown, optionally, the partitioned heating tube 3 has a single-layer wall structure, and the wall thickness of the partitioned heating tube 3 is 2-10mm. With a smaller wall thickness (e.g., 2mm), the tube has a lower heat capacity, resulting in faster heating and cooling rates, making it suitable for strip heating processes requiring rapid temperature response. With a larger wall thickness (e.g., 10mm), the tube has higher thermal stability and heat preservation capabilities, maintaining heating uniformity during long-term continuous lamination processes and avoiding lamination instability caused by temperature fluctuations. Therefore, limiting the wall thickness range can balance the requirements of both rapid response and stable heat preservation.

[0057] like Figure 3 As shown, optionally, the partitioned heating pipe 3 has a double-walled structure and is circulated with coolant. A jacket for coolant flow is provided between the outer wall 32 and the inner wall 33 of the partitioned heating pipe 3, with a jacket spacing L of 2-10 mm. The jacket spacing L refers to the distance between the outer and inner walls. The end of the partitioned heating pipe is provided with a coolant inlet 34 communicating with the jacket; the coolant inlet 34 is connected to an external circulating cooling device via a pipeline.

[0058] In this embodiment, the double-walled structure can form an interlayer space between the outer and inner layers. This space can be filled with insulation material or circulated with cooling fluid as needed to enhance thermal insulation performance or achieve more precise temperature control. When the interlayer spacing L is small (e.g., 2mm), it is beneficial to improve the overall strength and sealing performance of the tube body; when the interlayer spacing L is large (e.g., 10mm), the thermal insulation performance is better, and the temperature difference can be better regulated, effectively balancing the interference of the furnace cavity thermal environment on the protective atmosphere inside the heating tube and the temperature fluctuations during the strip heating process.

[0059] In addition, the double-walled structure provides extra thermal insulation. The temperature of the interlayer between the inner and outer walls is regulated by coolant. The flow rate and temperature of the coolant can be adjusted according to different types of strip or process requirements, thereby further optimizing the heating process. This design makes the temperature control of the heating tube more flexible. Especially when changing strips or adjusting processes, the flow rate or temperature of the coolant can be quickly adjusted according to new process requirements to adapt to the heating needs of different strips, making it highly adaptable.

[0060] To further specify, the partitioned heating tubes are circulated with different protective atmospheres depending on the composite strip material, including but not limited to argon, hydrogen-nitrogen mixtures, etc.; the heating chamber is protected by ammonia decomposition gas. The coolant includes but is not limited to circulating cooling water.

[0061] like Figure 3 As shown, optionally, the heating chamber 21 is provided with two or more partitioned heating tubes 3, which are inserted and fixed at intervals. In this embodiment, the installation of the partitioned heating tubes can be set according to process requirements. For example, a mounting groove for the heating tubes can be provided on the inner wall of the heating chamber. This groove structure can be arranged sequentially along the strip conveying direction, and the groove opening shape matches the shape of the partitioned heating tubes. In some embodiments, a supporting step can be provided at the bottom of the heating chamber to support the lower part of the partitioned heating tubes, so that they can maintain stable positioning under high temperature operation.

[0062] As a further preferred embodiment, the wall thickness or the interlayer spacing L between the outer tube wall 32 and the inner tube wall 33 of each of the partitioned heating tubes 3 is different. Specifically, the operator can select partitioned heating tubes with different wall thicknesses and interlayer spacings according to the material, thickness, and target heating temperature of the strip to be laminated. Simply replacing the partitioned heating tubes with different types or specifications can meet the heating adjustment requirements under different material or process conditions. Furthermore, the replaceability of the partitioned heating tubes makes the selection of the type or power of the heating source more flexible, not limited to a specific heating source or specific settings of the heating furnace. It does not require changing the overall structure of the heating furnace, and the heating chamber maintains the same temperature throughout. Heating tubes with different wall thicknesses or interlayer spacings can still achieve heating adjustment for different strips by adjusting the wall thickness, introducing different circulating coolants into the interlayer, or adjusting the coolant flow rate and temperature; significantly improving the adaptability and flexibility of the laminating equipment in multiple process scenarios and reducing equipment adjustment and modification costs.

[0063] The heating device in this embodiment is particularly suitable for low-temperature composite processing of electrical contact profiles (heating temperature range of approximately 500°C-700°C). Through the design of the zoned heating tubes, the composite strip can be controlled in multiple sections within the heating chamber. The heating parameters for each section can be independently adjusted according to the material, thickness, and process requirements. In actual operation, the heating rate and heat distribution of the strip can be adjusted by selecting zoned heating tubes of different thicknesses (e.g., using 310S stainless steel tubes or ceramic tubes with different wall thicknesses and coolant), achieving precise heating control of the composite material.

[0064] Example 2

[0065] like Figure 6-10 As shown, this embodiment 2 provides a composite device 20 including the adjustable heating device 10 for composite electrical contact materials, wherein the composite electrical contact material is an irregularly shaped composite electrical contact material. The irregularly shaped composite electrical contact material can be a silver metal irregularly shaped solder strip with a non-rectangular cross-section, such as a trapezoidal cross-section, an arc-shaped cross-section, or a cross-section with protrusions or grooves. Its irregularly shaped structure improves the mechanical stability and conductivity of the electrical contact portion.

[0066] It should be noted that the composite equipment described in this application is not only applicable to the preparation of irregularly shaped composite electrical contact materials, but can also be used for the continuous composite production of other metal composite materials, such as composite strips for electronic packaging, functionalized composite solder strips, or composite metal strips with special surface structures.

[0067] Specifically, the composite equipment includes a strip unwinding device 201, a material grinding device 202, a rolling cooling device 203, and a strip winding device 204 arranged sequentially along the conveying direction of the strip to be composited; the adjustable heating device 10 is located between the material grinding device 202 and the rolling cooling device 203; generally, the composite equipment also includes a main control system (not shown in the attached figure), which is electrically connected to the strip unwinding device 201, the material grinding device 202, the adjustable heating device 10, the rolling cooling device 203, and the strip winding device 204; used for centralized control and coordination of each functional module;

[0068] The strip unwinding device 201 includes an unwinding cabinet 2011 and unwinding reels 2012 spaced apart on the unwinding cabinet 2011. The unwinding reels 2012 are used to wind and unwind the strip to be laminated under power drive. Optionally, the strip to be laminated includes two or more types. The strip may include strip A: one or more silver alloys such as silver-nickel, silver, and silver-tin oxide, as a conductive surface material; strip B: one or more of copper, iron, and gold, as an intermediate layer or conductor substrate material; and strip C: iron or other metal materials, as a support layer or back metal layer. The laminated strip is used to manufacture electrical contact materials to improve the conductivity, arc resistance, weldability, and mechanical strength of electrical switch and relay contacts.

[0069] The material grinding device 202 includes a grinding cabinet 2021 and several grinding rollers 2022 staggered on the grinding cabinet 2021 for surface grinding of the composite strip to be ground; the grinding cabinet has a perforated structure (not shown in the attached figure) on the side facing the unwinding cabinet for the strip to pass through. More preferably, a fan assembly for collecting grinding dust can also be provided below the grinding rollers. In this way, the material grinding device is directly integrated at the front end of the strip unwinding device, and the surface treatment of the strip is achieved by adsorbing and collecting grinding dust through the staggered multi-roller grinding machines and the fan below.

[0070] More preferably, the material grinding device 202 is provided with straightening and leveling devices 207 on both its front and rear sides; each straightening and leveling device 207 includes multiple straightening rollers 2071, the axes of which are spaced apart on the same horizontal line, for guiding and straightening the strip material before it enters the grinding station and after it leaves the grinding station. Thus, pre-straightening of the strip material before it enters the grinding station eliminates bending, warping, or localized deformation during unwinding or conveying, ensuring a uniform grinding surface; simultaneously, straightening is performed again after the grinding station to keep the strip material straight and allow it to smoothly enter subsequent laminating or heating processes, reducing conveying deviations and material damage.

[0071] Generally, the rolling cooling device 203 includes a roll assembly 2031 and a circulating water tank 20321 connected to the roll assembly 2031 and used for cooling the rolled strip; more specifically, the rolling cooling device 203 includes a roll mounting base 2033; the roll assembly 2031 includes an upper roll 20311 and a lower roll 20312 spaced apart, and a synchronous gear 2034 is axially connected to the same end of the upper roll 20311 and the lower roll 20312, and the two synchronous gears 2034 are meshed together; the cooling circulation device 2032 includes a circulating water tank 20321 with an inlet and an outlet, and the inlet and outlet are respectively connected to the upper roll 20311 and the lower roll 20312 through a circulation pipe 20322.

[0072] In this embodiment, the roll assembly consists of rolls arranged at intervals, meshed and linked by synchronous gears at their ends to ensure synchronicity and eliminate differential speed. Furthermore, the cooling system is directly connected to a circulating water tank and circulating pipes, forming a closed cooling loop to achieve continuous cooling of the roll surface. For example, a hollow sleeve is fitted at one end of the roll, connected to the circulating water tank via a circulating pipe. Cooling water from the circulating water tank enters the sleeve through the inlet under the action of a water pump (not shown in the attached figure) and flows along the internal channels of the roll, continuously cooling it. This ensures that the roll maintains a suitable temperature during high-speed operation and composite rolling, preventing changes in the rolling gap or instability in strip composite due to roll overheating.

[0073] Generally, due to the special surface morphology of irregularly shaped composite materials, direct winding can cause damage and quality problems. Forming an isolation layer through paper feeding ensures surface integrity and winding stability. Therefore, a paper feeding device 205 is provided between the rolling cooling device 203 and the strip winding device 204. The paper feeding device 205 includes a paper feeding tray 2051 and a paper feeding drive mechanism 2052. The paper feeding drive mechanism is synchronously arranged with the strip winding device 204. For example, the paper feeding tray can be fitted with an isolation paper roll via a detachable shaft core for easy replacement and loading / unloading. The guide wheel assembly may include a tension wheel and a steering wheel. The tension wheel applies a constant tension to the isolation paper through an elastic mechanism or pneumatic device to achieve stable output of the isolation paper. The paper feeding drive mechanism may include a motor-driven paper feeder.

[0074] Thus, the paper feeding drive mechanism and the strip winding device are set synchronously, so that the paper feeding and winding processes are coordinated and consistent. During the strip winding process, the release paper and the strip surface always enter the winding area at the same speed and at the same distance, thereby avoiding wrinkling, accumulation or stretching deformation of the release paper caused by speed differences.

[0075] To further explain, the strip winding device 204 includes a winding cabinet 2041 and a winding reel 2042 rotatably mounted on the winding cabinet 2041; the winding reel 2042 is used to wind the finished composite strip under power drive.

[0076] Optionally, the strip winding device 204 includes a material shortage sensing wheel 2043 and a material shortage braking assembly 2044. The material shortage sensing wheel 2043 is disposed on the finished strip winding path to contact and sense the strip. The material shortage braking assembly 2044 includes a clamping member 20441 that laterally presses the surface of the finished strip on the winding reel 2042 and a cylinder 20442 that drives the clamping member 20441 to move closer to or away from the finished strip. Thus, the material shortage sensing wheel sends a signal of the finished strip to the main control system (not shown in the attached figure); when the finished strip breaks, the main control system controls the winding reel to stop rotating and controls the cylinder to drive the clamping member to press the finished strip.

[0077] Optionally, guide wheels 2061 groups 206 are respectively provided between the strip unwinding device 201 and the material grinding device 202, and between the rolling cooling device 203 and the strip winding device 204. Each guide wheel 2061 group 206 includes guide wheels 2061 and mounting plates 2062 for mounting the guide wheels 2061. The mounting plate 2062 has strip-shaped adjustment holes 20621. The guide wheels 2061 are fixed to different parts of the strip-shaped adjustment holes 20621 by locking members to achieve position adjustment of the guide wheels 2061. The guide wheels adopt an adjustable design, allowing position adjustment according to the strip width, thickness, or tension, thereby adapting to the conveying requirements of different strip specifications. Simultaneously, it can quickly adjust the guiding position when the strip deviates, shortening production debugging time.

[0078] The composite equipment in Example 2 features a compact overall structure and a high degree of automation. It integrates functional units such as strip unwinding, grinding, straightening, zoned heating, rolling cooling, paper feeding, and rewinding into a single continuous composite production line. Centralized control of strip tension, heating temperature, protective atmosphere, roll cooling, and rewinding actions ensures synchronous coordination of each process, avoiding instability caused by manual intervention and single-machine operation. Furthermore, the equipment's compact structure and small footprint, along with its rational module arrangement, facilitate operation and maintenance. In addition, automated control ensures strip synchronization, wiring accuracy, and composite consistency, reducing human error and enabling rapid response to abnormal conditions such as strip breakage and material shortages, thereby guaranteeing the feasibility and stability of continuous, high-precision composite processes.

[0079] It should be noted that components whose models or specific structural parameters are not specifically listed in this specification (such as motors, guide wheels, main control systems, heating sources, cooling sources, etc.) can be configured and implemented using commonly used mature components or equivalent alternatives in the prior art, provided that the realization of the core technical solution of this utility model is not affected. Those skilled in the art can select and combine suitable existing components according to specific production needs and equipment selection standards.

[0080] The above embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. For those skilled in the art, it will be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tunable heating device for a composite electrical contact material, characterized by, The system includes a frame installed on the conveying path of the strip to be composited and a heating furnace installed on the frame; the heating furnace is provided with a heating chamber and heated by a heating device; the heating chamber is optionally or replaceably equipped with partitioned heating tubes for the strip to pass through; the inner cavity of the partitioned heating tubes is not in communication with the space of the heating chamber, and the heating chamber and / or the partitioned heating tubes are each independently vented to a protective atmosphere; The partitioned heating tube extends along the strip conveying direction and is fixed inside the heating chamber. The end of the partitioned heating tube is provided with a gas inlet for introducing a protective atmosphere.

2. The adjustable heating device for composite electrical contact materials as described in claim 1, characterized in that, The heating chamber is equipped with a partitioned heating tube, with both ends of the partitioned heating tube extending to the outside of the heating chamber and not communicating with the space of the heating chamber. The gas inlet is connected to an external protective atmosphere source through a pipeline.

3. The adjustable heating device for composite electrical contact materials as described in claim 2, characterized in that, The partitioned heating tube has a single-layer wall structure, and the wall thickness of the partitioned heating tube is 2-10mm.

4. The adjustable heating device for composite electrical contact materials as described in claim 2, characterized in that, The partitioned heating tube has a double-walled structure. A jacket for introducing coolant is provided between the outer and inner walls of the partitioned heating tube, with a gap of 2-10 mm between the jackets. The end of the partitioned heating tube is provided with a coolant inlet that communicates with the jacket. The coolant inlet is connected to an external circulating cooling device through a pipeline.

5. The adjustable heating device for composite electrical contact materials as described in claim 3 or 4, characterized in that, The heating chamber is provided with two or more partitioned heating tubes, which are inserted and fixed at intervals.

6. The adjustable heating device for composite electrical contact materials as described in claim 5, characterized in that, The wall thickness or the interlayer spacing between the outer and inner layers of each of the aforementioned zone heating tubes is different.

7. A composite apparatus comprising an adjustable heating device for composite electrical contact materials as described in any one of claims 1-6, characterized in that, The device includes a strip unwinding device, a material grinding device, a rolling cooling device, and a strip winding device arranged sequentially along the conveying direction of the strip to be composited; the adjustable heating device is located between the material grinding device and the rolling cooling device. The strip unwinding device includes an unwinding cabinet and unwinding reels spaced apart on the unwinding cabinet. The unwinding reels are used to wind and unwind the strip to be laminated under power drive. The material grinding device includes a grinding cabinet and several grinding rollers arranged alternately on the grinding cabinet for surface grinding of the composite strip to be ground; The rolling cooling device includes a roll group and a cooling circulation device connected to the roll group and used to cool the rolled strip. The strip winding device includes a winding cabinet and a winding reel rotatably mounted on the winding cabinet; the winding reel is used to wind the finished composite strip under power drive.

8. The composite device for an adjustable heating apparatus for composite electrical contact materials as described in claim 7, characterized in that, The rolling cooling device includes a roll mounting base; the roll group includes an upper roll and a lower roll arranged at intervals, and a synchronous gear is axially connected to the same end of the upper roll and the lower roll, and the two synchronous gears are meshed together; the cooling circulation device includes a circulating water tank with an inlet and an outlet, and the inlet and outlet are respectively connected to the upper roll and the lower roll through circulation pipes. A paper feeding device is provided between the rolling cooling device and the strip winding device; the paper feeding device includes a paper feeding tray and a paper feeding drive mechanism; the paper feeding drive mechanism is set synchronously with the strip winding device.

9. The composite device for an adjustable heating apparatus for composite electrical contact materials as described in claim 7, characterized in that, The strip winding device includes a material shortage sensing wheel and a material shortage braking assembly; the material shortage sensing wheel is arranged on the finished strip winding path to contact and sense the strip; the material shortage braking assembly includes a clamping member that laterally presses the surface of the finished strip on the winding reel and a cylinder that drives the clamping member to move closer to or away from the finished strip.

10. The composite device for an adjustable heating apparatus for composite electrical contact materials as described in claim 7, characterized in that, Guide wheel sets are respectively provided between the strip unwinding device and the material grinding device, and between the rolling cooling device and the strip winding device; the guide wheel set includes a guide wheel and a mounting plate for mounting the guide wheel; the mounting plate is provided with a strip-shaped adjustment hole; the guide wheel is fixed at different positions of the strip-shaped adjustment hole by a locking member to realize the position adjustment of the guide wheel.

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