Wire mesh sandwich panel preparation and incremental forming integrated device and method of using same

Abstract

The present application relates to a kind of metal wire mesh sandwich panel preparation and progressive forming integrated device and its use method, including the clamping mechanism for placing sandwich panel and the forming welding mechanism located above and below clamping mechanism, the forming welding mechanism includes the main forming tool head structure located above sandwich panel and the auxiliary tool head structure located below sandwich panel, the adjustable power supply is provided outside the forming welding mechanism, the main forming tool head structure, auxiliary tool head structure, adjustable power supply, sandwich panel forming area form first welding closed loop, the clamping mechanism, main forming tool head structure, sandwich panel non-forming area form second welding closed loop.The present application is simple in structure, reasonable in design, convenient to use, not only reduces production cost and production cycle, expands the application range of sandwich panel, while the sandwich panel produced meets the requirements of forming quality and welding quality, can also meet the performance requirements of lightweight, shock resistance and noise reduction.

Description

TECHNICAL FIELD

[0001] The present application relates to a metal wire mesh sandwich panel preparation and incremental forming integrated device and its use method. BACKGROUND

[0002] Sandwich panels are connected and combined by thin and high-strength face plates and light-weight core layers with special structures. Due to the advantages of light weight, high strength and stiffness, and strong vibration reduction capability, sandwich panels have great application in aerospace, vehicles, ships and buildings. There are many ways to classify sandwich panels. According to the different structures of the core layer, sandwich panels can be divided into: foam sandwich panel, dot matrix sandwich panel, and polymer sandwich panel. With the expansion of the application range of sandwich panels, sandwich panels are no longer limited to simple planar panels and need to be made into different three-dimensional curved shapes to meet different working conditions. Currently, there are two main methods to obtain curved sandwich panel workpieces: (1) The first method is to form the face plate and the core layer respectively, and then connect the face plate and the core layer by using adhesive or welding method. However, due to the elastic recovery of the formed plate and core layer to different degrees, the upper and lower face plates and the core layer of the sandwich panel cannot match, resulting in poor precision of the product. Therefore, a shaping device or a shaping die is needed for shaping and assembling. The high cost and complex process of workpiece manufacturing restrict the application of this method in actual production. (2) The second method is to prepare the sandwich panel first and then perform plastic forming on it. The preparation method of the sandwich panel can be divided into adhesive method, welding method and powder metallurgy method. Among them, the adhesive method has the problems of long curing time, aging failure of the adhesive layer, and easy melting of the adhesive layer under high temperature conditions. Most of the sandwich panels are prepared by brazing in the welding method. Although the sandwich panel prepared by this method is not easy to crack, the plasticity of the brazed sandwich panel is poor due to the hardening of the brazing filler metal, which is not conducive to subsequent forming. From the above content, it can be seen that the traditional sandwich panel is prepared and formed on different devices, which leads to long production cycle, high cost, and the quality of the manufactured product is difficult to meet the expected requirements. SUMMARY

[0003] The present application improves the above problems, that is, the technical problem to be solved by the present application is to provide a metal wire mesh sandwich panel preparation and incremental forming integrated device and its use method, which is simple in structure and convenient to use.

[0004] The present application is composed of a clamping mechanism for placing the sandwich board and a forming and welding mechanism above and below the clamping mechanism, the forming and welding mechanism includes a main forming tool head structure above the sandwich board and an auxiliary tool head structure below the sandwich board, an adjustable power supply is arranged outside the forming and welding mechanism, the main forming tool head structure, the auxiliary tool head structure, the adjustable power supply and the forming area of the sandwich board form a first welding closed loop, and the clamping mechanism, the main forming tool head structure and the non-forming area of the sandwich board form a second welding closed loop.

[0005] Further, the clamping mechanism includes a positioning seat, a copper alloy plate and an insulating plate arranged in sequence from top to bottom, the positioning seat is provided with a positioning seat opening in the middle, the copper alloy plate is provided with a copper alloy plate opening in the middle, the size of the positioning seat opening is larger than that of the copper alloy plate opening, and a step surface for placing the sandwich board is formed between the positioning seat opening and the upper surface of the copper alloy plate, an edge plate is arranged at the upper edge of the sandwich board, and a fixing clamp for limiting the edge plate is arranged above the positioning seat.

[0006] Further, the main forming tool head structure and the auxiliary tool head structure are symmetrically arranged above and below; the main forming tool head structure includes a machine tool spindle, a clamp shell and a forming tool head arranged in sequence from top to bottom, the forming tool head penetrates through the clamp shell and is threadedly connected with the clamp shell, an insulating gasket is arranged between the upper part of the forming tool head and the lower surface inside the clamp shell, and an insulating nut is arranged between the middle part of the forming tool head and the lower surface outside the clamp shell.

[0007] Further, a compressed air cooling system is arranged outside the main forming tool head, the compressed air cooling system includes a double-sided cooling cylinder sleeved outside the main forming tool head and a compressed gas refrigerator, the double-sided cooling cylinder is connected with the compressed gas refrigerator through a gas guide pipe, and a gas blowing port is arranged inside the double-sided cooling cylinder to blow cold air to the forming tool head.

[0008] Further, the double-sided cooling cylinder includes a ring-shaped air inlet cavity, an air outlet cavity and a connecting air pipe for connecting the ring-shaped air inlet cavity and the air outlet cavity, a cold air transmission connector for connecting with the gas guide pipe is arranged on the side of the ring-shaped air inlet cavity, and the forming tool head is located inside the air outlet cavity, and the output port of the air outlet cavity is conical.

[0009] Further, an electrically conductive clamp for clamping the copper alloy plate is arranged outside the adjustable power supply, and the adjustable power supply and the electrically conductive clamp are connected through an electric wire.

[0010] Further, an infrared thermal imager is arranged on the side of the main forming tool head structure.

[0011] Further, an electric wire fixer is arranged on the side of the clamp shell.

[0012] Further, the sandwich panel comprises an upper panel, a core layer and a lower panel arranged in sequence from top to bottom.

[0013] Further, the use method of the metal wire mesh sandwich panel preparation and incremental forming integrated device includes the following steps: (1) first clean the surface of the panel and the core layer, then place the core layer between the upper and lower panels, and then place the combined sandwich panel on the copper alloy plate, limit the position of the sandwich panel by the positioning seat opening of the positioning seat, press the sandwich panel with the edge plate, and clamp the sandwich panel with the fixing clamp; (2) install the forming tool head structure on the machine tool spindle, fix the wire with the wire fixer, connect the wire to the wire connector on the side of the forming tool head structure, connect the wire to the wire connector on the side of the auxiliary tool head structure in the same way, install the auxiliary tool head structure on the lower machine tool spindle, then sequentially connect and fix the adjustable power supply, the forming tool head structure, the auxiliary tool head structure, and the copper alloy plate, first disconnect the switch at the auxiliary tool head and the copper alloy plate, and the circuit is not powered on; (3) start the machine tool, and the sandwich panel preparation and incremental forming integrated device starts to work, initially in the sandwich panel forming stage, the forming tool head structure runs on the sandwich panel according to the set forming track, and the auxiliary tool head structure plays a supporting role, and after the panel material is formed, the current and voltage of the adjustable power supply are adjusted to appropriate values to prepare for the welding step of the panel and the core layer; (4) the area of the sandwich panel that needs to be welded has a non-forming area and a forming area, when welding the non-forming area of the sandwich panel, the switch connected to the copper alloy plate is turned on, the copper alloy plate is connected to the circuit by the conductive clamp, the forming tool head structure, the sandwich panel, the copper alloy plate, and the adjustable power supply form a closed loop, the forming tool head makes a circumferential motion in the non-forming area, and the copper alloy plate plays a role of conducting electricity and supporting the non-forming area in this process; (5) after the non-forming area is welded, the switch between the copper alloy plate and the adjustable power supply is disconnected, the current and voltage of the power supply are automatically adjusted to appropriate values to prepare for the next stage; (6) turn on the switch connected to the auxiliary tool head structure, start to weld the forming area of the sandwich panel, the forming tool head structure, the sandwich panel, the auxiliary tool head, and the adjustable power supply form a closed loop, the forming tool head and the auxiliary tool head structure respectively act as upper and lower electrodes in the loop, the positions of the two tool heads correspond during welding, the heat input of the upper and lower electrodes is consistent, welding residual deformation defects are avoided, the current flows from the forming tool head to the area that needs to be welded, so that the area reaches a local melting state, and finally the upper and lower panels and the core layer are welded together through the combined action of heat and force, so that the panel and the core layer have sufficient connection strength; (7) during the welding process, the infrared thermal imager can monitor the temperature distribution of the welding area in real time, the thermal image can be used to judge the welding quality, and the operator can adjust the power voltage and current according to the information to ensure the welding quality.(8) In the welding process, heat is concentrated on the forming tool head structure and the auxiliary tool head structure, in order to avoid the influence of high temperature on the service life of the tool head, it is necessary to open the compressed air cooling system during the welding process, the cooling gas generated by the compressed gas refrigerating machine is transmitted to the double-sided cooling cylinder through the gas guide pipe, and the cooling gas is symmetrically blown from the inside of the double-sided cooling cylinder to the forming tool head, so as to play the role of rapidly cooling the forming tool head; (9) After the welding is completed, the adjustable power supply is closed, and after the infrared thermal imager monitors that the temperature of the sandwich panel cools to room temperature, the fixing clamp is removed, and the workpiece is taken out from the positioning seat, thus the gradual forming and preparation process of the sandwich panel is completed.

[0014] Compared with the prior art, the present application has the following advantages: (1) The device is simple in structure and safe in operation, and fully utilizes the advantages of incremental forming and resistance welding to realize the functions of preparation and incremental forming of the wire mesh sandwich panel on one device, solves the problem of manufacturing the existing three-dimensional curved sandwich panel which needs multiple devices, reduces the production cost and production cycle, expands the application range of the sandwich panel, and has great significance for improving the commercial application value of the sandwich panel. (2) The operation steps of the device are reasonable, the panel and the core layer are formed in the absence of welding hardening first, the forming difficulty of the sandwich panel is reduced, and the forming quality of the workpiece is improved, then the panel and the core layer are connected by resistance welding process, in the welding process, the movement of the forming tool head around the set trajectory not only plays a role of resistance welding on the sheet material, but also plays a role of shaping, the produced sandwich panel not only meets the requirements of forming quality and welding quality, but also meets the requirements of lightweight, shock resistance and noise reduction. (3) The device uses resistance welding process to connect the panel and the core layer, resistance welding is simple to operate, the joint quality is high, the heating time is short, the heat is concentrated, so the heat affected zone is small, and the residual stress is also small, which will not damage the internal structure of the sandwich panel. In addition, resistance welding does not need to fill metal, which can avoid the introduction of other impurity elements, so that the panel and the core layer have a strong bonding interface, and the accumulation of other metals in the core layer can also be avoided, which improves the porosity of the sandwich panel to a certain extent. (4) The welding circuit of the device can realize the welding of the non-forming area and the forming area of the sandwich panel in steps, when the switch connected with the copper alloy plate is opened, the welding of the non-forming area of the sandwich panel can be carried out, and the copper alloy plate can play the roles of conducting electricity and supporting the sandwich panel; when the switch connected with the copper alloy plate is disconnected, and the switch connected with the auxiliary tool head structure is opened, the welding of the forming area of the sandwich panel can be carried out. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the embodiment of the present application;

[0016] Figure 2 It is a sectional view of the embodiment of the present application;

[0017] Figure 3Structure sectional view of main forming tool head structure of embodiment of the present application;

[0018] Figure 4 Schematic diagram of welding control circuit of embodiment of the present application;

[0019] Figure 5 Schematic diagram of sandwich panel structure of embodiment of the present application;

[0020] In the figure: 1 - upper panel, 2 - core layer, 3 - lower panel, 4 - sandwich panel, 5 - insulating panel, 6 - copper alloy panel, 7 - positioning seat, 8 - fixing clamp, 9 - forming tool head, 10 - infrared thermal imager, 11 - wire fixer, 12 - wire, 13 - air guide pipe, 14 - compressed gas refrigeration machine, 15 - adjustable power supply, 16 - conductive clamp, 17 - auxiliary tool head structure, 18 - insulating nut, 19 - clamp shell, 20 - wire joint, 21 - built-in wire, 22 - round wire terminal, 23 - insulating gasket, 24 - thread, 25 - edge pressing plate, 26 - cold gas transmission joint, 27 - connecting air pipe, 28 - double-sided cooling cylinder, 29 - non-forming area, 30 - forming area, 31 - machine tool spindle, 32 - annular air inlet cavity, 33 - air outlet cavity. DETAILED DESCRIPTION

[0021] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0022] Embodiment: refer to the drawings Figures 1-5 As shown, a metal wire mesh sandwich panel preparation and incremental forming integrated device is provided, which comprises a clamping mechanism for placing a sandwich panel and a forming and welding mechanism located above and below the clamping mechanism, the forming and welding mechanism comprises a main forming tool head structure located above the sandwich panel and an auxiliary tool head structure located below the sandwich panel, an adjustable power supply 15 is arranged outside the forming and welding mechanism, the main forming tool head structure, the auxiliary tool head structure, the adjustable power supply, and the sandwich panel forming area form a first welding closed loop, and the clamping mechanism, the copper alloy panel of the main forming tool head structure, and the non-forming area of the sandwich panel form a second welding closed loop.

[0023] The main forming tool head structure and the auxiliary tool head structure are respectively connected with the adjustable power supply through wires, the wires extend into the inside of the clamp shell to form built-in wires 21 and are connected with the forming tool head, and a round wire terminal is arranged at the connection between the forming tool head and the wire.

[0024] The main forming tool head structure and the auxiliary tool head structure are the same in structure and are symmetrically arranged.

[0025] The above-mentioned welding process is resistance welding.

[0026] In the embodiment, the clamping mechanism comprises a locating seat 7, a copper alloy plate 6 and an insulating plate 5 arranged in sequence from top to bottom, the middle of the locating seat is provided with a locating seat opening, the middle of the copper alloy plate is provided with a copper alloy plate opening, the locating seat opening is larger than the copper alloy plate opening, and a step surface for placing the sandwich panel is formed between the locating seat opening and the upper surface of the copper alloy plate, the upper edge of the sandwich panel is provided with an edge pressing plate, and the upper portion of the locating seat is provided with a fixing clamp 8 for limiting the edge pressing plate.

[0027] The fixing clamp is installed on the locating seat, and the fixing clamp can adopt a quick clamp device in the prior art to quickly position the edge pressing plate. In addition, the fixing clamp can also adopt a fixing shaft, a supporting arm in rotation with the fixing shaft, and a top rod movably arranged on the supporting arm and in threaded connection with the supporting arm.

[0028] The sandwich panel 4 is placed on the copper alloy plate 6, the position of the sandwich panel 4 on the copper alloy plate 6 is limited by the locating seat 7, and the sandwich panel 4 is pressed by the edge pressing plate 25, and the fixing clamp 8 is adjusted according to the thickness of the sandwich panel to clamp the sandwich panel 4.

[0029] The forming tool head is used for forming the workpiece and conducting current to the workpiece, and therefore a material with good wear resistance and conductivity is selected as the tool head. In addition, an internal hexagonal hole is designed at the upper end of the forming tool head 9 for convenient installation. In the gradual forming stage, the forming tool head 9 is used for forming the workpiece, and the auxiliary tool head 17 is used for supporting to improve the forming precision of the workpiece.

[0030] In the preparation stage of the sandwich panel, the welding of the non-forming area 29 and the forming area 30 of the sandwich panel is performed in steps. In the welding of the forming area 30 of the sandwich panel, the forming tool head and the auxiliary tool head are used as upper and lower electrodes, respectively. The current flows from the forming tool head to the sandwich panel 4 and then flows out from the auxiliary tool head 17. The area of the sandwich panel 4 in contact with the upper and lower electrodes is melted due to the heat effect and is pressed by the forming tool head 9 and the auxiliary tool head 17. The welding points are formed between the panel and the core layer to realize the metal combination of the two.

[0031] One end of the adjustable power supply 15 is connected to the forming tool head, and the other end is connected to the auxiliary tool head structure or the copper alloy plate 6. In the welding of the non-forming area 29 of the sandwich panel, the copper alloy plate 6 is connected to the circuit by the conductive clamp 16. At this time, the forming tool head, the sandwich panel 4, the copper alloy plate 6 and the adjustable power supply 15 form a closed loop. The copper alloy plate 6 is used for conducting electricity, dissipating heat and supporting the sandwich panel. The auxiliary tool head 17 does not work, and the forming tool head 9 moves along the non-forming area 29 to complete the welding.

[0032] In the embodiment, the main forming tool head structure and the auxiliary tool head structure are symmetrically arranged upside down; the main forming tool head structure comprises a machine tool spindle 31, a clamp shell 19 and a forming tool head 9 arranged in sequence from top to bottom, the forming tool head penetrates through the clamp shell and is matched with the clamp shell through threads 24, an insulating gasket 23 is arranged between the upper part of the forming tool head and the lower surface inside the clamp shell, and an insulating nut 18 is arranged between the middle part of the forming tool head and the lower surface outside the clamp shell.

[0033] In the embodiment, the main forming tool head is externally provided with a compressed air cooling system, the compressed air cooling system comprises a double-sided cooling cylinder 28 sleeved on the outside of the main forming tool head and a compressed gas refrigerator 14, the outside of the double-sided cooling cylinder is connected with the compressed gas refrigerator through a gas guide pipe, and the inside of the double-sided cooling cylinder is provided with air blowing ports for blowing cold air to the forming tool head.

[0034] The double-sided cooling cylinder comprises a ring-shaped air inlet cavity 32, an air outlet cavity 33 and a connecting air pipe 27 for connecting the ring-shaped air inlet cavity and the air outlet cavity, the side of the ring-shaped air inlet cavity is provided with cold air transmission joints for connecting with the gas guide pipe, the forming tool head is located inside the air outlet cavity, and the output port of the air outlet cavity is tapered.

[0035] In the welding process, heat is concentrated on the tool head, and high temperature can cause tool head wear and reduce the service life of the tool head, and can also affect other components in the device. In order to avoid the above situation, the device is provided with a compressed air cooling system, two air blowing ports are symmetrically arranged on the upper side of the air outlet cavity, which can make the cooling gas symmetrically blow to the forming tool head, and the output port of the air outlet cavity is tapered, so that the cooling gas is blown to the hemispherical end part of the forming tool head in contact with the sheet metal along the tapered surface, so that it is fully cooled.

[0036] In the embodiment, the adjustable power supply is externally provided with a conductive clamp 16 for clamping on the copper alloy plate, and the adjustable power supply and the conductive clamp are connected through wires.

[0037] In the embodiment, the side of the main forming tool head structure is provided with an infrared thermal imager 10;

[0038] The infrared thermal imager 10 is used to monitor the temperature distribution of the welding position of the sandwich panel in the welding process, and the thermal imaging diagram of the welding process obtained in real time is transmitted to the computer, and the welding point temperature information is obtained after the computer analysis, and the operator takes corresponding measures according to the obtained information, such as adjusting the voltage and current of the adjustable power supply 15 to improve the welding quality. In addition, the infrared thermal imager 10 also records the temperature field of the workpiece after welding, observes the time of the welded sandwich panel staying in high temperature state, and judges whether it is necessary to take cooling measures to avoid the sandwich panel staying in high temperature for too long and causing adverse effects on the welding quality.

[0039] In this embodiment, in order to fix the electric wire 12 conveniently, the clamp shell side is provided with an electric wire fixer 11.

[0040] In this embodiment, the sandwich panel 4 comprises an upper panel 1, a core layer 2 and a lower panel 3 arranged in sequence from top to bottom.

[0041] In this embodiment, during working:

[0042] Step one: firstly, clean the oxidation film on the surface of the panel and the core layer, place the core layer 2 between the upper panel 1 and the lower panel 3, then place the combined sandwich panel 4 on the copper alloy plate 6, limit the position of the sandwich panel 4 by the positioning seat opening of the positioning seat 7, press the sandwich panel by the edge plate 25, and clamp the sandwich panel 4 by the fixing clamp 8.

[0043] Step two: install the forming tool head structure on the machine tool spindle 31, fix the electric wire 12 by the electric wire fixer 11, connect the electric wire 12 to the electric wire connector 20 on the side of the forming tool head structure, connect the electric wire of the auxiliary tool head structure in the same way, install the auxiliary tool head structure on the lower machine tool spindle, then connect and fix the adjustable power supply 15, the forming tool head 9, the auxiliary tool head 17 and the copper alloy plate 6 in sequence, disconnect the switch at the auxiliary tool head 17 and the copper alloy plate 6, and the circuit is not powered.

[0044] Step three: start the machine tool, and the sandwich panel preparation and incremental forming integrated device starts to work. Initially, it is the sandwich panel forming stage. The forming tool head structure runs on the sandwich panel according to the set forming track, and the sandwich panel is pressed and formed. The auxiliary tool head structure plays a supporting role. After the panel material is formed, the current and voltage of the adjustable power supply 15 are adjusted to appropriate values, so as to prepare for the welding step of the panel and the core layer.

[0045] Step four: the sandwich panel needs to be welded in the non-forming area 29 and the forming area 30. When the sandwich panel non-forming area 29 is welded, the switch connected with the copper alloy plate 6 is turned on, the copper alloy plate 7 is connected to the circuit by the conductive clamp 16, the forming tool head structure, the sandwich panel 4, the copper alloy plate 6 and the adjustable power supply 15 form a closed loop, the forming tool head moves around the non-forming area 29, and the copper alloy plate 7 plays a role of conducting electricity and supporting the non-forming area 29 in this process. After the non-forming area 29 is welded, the switch between the copper alloy plate 6 and the adjustable power supply 15 is disconnected, and the current and voltage of the power supply are automatically adjusted to appropriate values, so as to prepare for the next stage.

[0046] Step five: open the switch connected to the auxiliary tool head 17, start welding the forming area 30 of the sandwich panel, the forming tool head structure, the sandwich panel 4, the auxiliary tool head 17 and the adjustable power supply 15 form a closed loop, the forming tool head 9 and the auxiliary tool head structure respectively act as upper and lower electrodes in the loop, the positions of the two tool heads correspond during welding, ensuring consistent heat input of the upper and lower electrodes and avoiding defects such as large residual deformation. The current flows from the forming tool head 9 to the area to be welded, making it reach a partially melted state, and finally the upper and lower panels and the core layer are welded together through the combined action of heat, ensuring sufficient connection strength between the panels and the core layer. During the welding process, the infrared thermal imager 10 can monitor the temperature distribution of the welding area in real time, and the thermal imaging image can be used to judge the welding quality. The operator can adjust the power voltage and current according to this information to ensure the welding quality.

[0047] Step six: during the welding process, heat is concentrated on the forming tool head structure and the auxiliary tool head structure. In order to avoid excessive temperature affecting the service life of the tool head, it is necessary to start the compressed air cooling system during the welding process. The cooling gas generated by the compressed gas refrigerator 14 is transmitted to the cold gas transmission joint 26 through the gas guide pipe 13 and transmitted to the double-sided cooling cylinder 28. The cooling gas is symmetrically blown from the inside of the double-sided cooling cylinder 28 to the forming tool head 9, which plays a role in rapidly cooling the forming tool head. The cooling principle of the auxiliary tool head structure is the same.

[0048] Step seven: after the welding is completed, turn off the adjustable power supply 15, and after the infrared thermal imager 10 monitors that the temperature of the sandwich panel has cooled to room temperature, remove the clamp 8 and take out the workpiece from the positioning seat 7. At this point, the gradual forming and preparation process of the sandwich panel is completed.

[0049] In this embodiment, the device solves the problem of connecting different materials of the core layer and the panel. It uses resistance welding to connect the panel and the core layer. Resistance welding can adapt to the welding of multiple types of the same or different metals. In addition, resistance welding does not require filler metal, and the porosity of the prepared sandwich panel is higher than that of the sandwich panel prepared by other connection methods. Compared with stamping and other forming processes that require molds, the device uses the gradual forming process with the advantage of flexible manufacturing to form the sandwich panel. It can customize different shapes of workpieces according to customer needs, realize customized production, and the device is simple to operate and easy to realize mechanical automation.

[0050] Any technical solution disclosed in the present application, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, any person skilled in the art should understand that the preferred numerical range is only one of the many implementable values with more obvious technical effects or representative values. Because there are too many values to enumerate, the present application discloses some values to illustrate the technical solutions of the present application, and the above enumerated values should not constitute a limitation on the protection scope of the present application.

[0051] If the words "first", "second" and the like are used herein to limit parts, those skilled in the art should know that the use of "first", "second" is only for the convenience of description to distinguish the parts, and the above words have no special meaning unless otherwise stated.

[0052] Meanwhile, the above-mentioned application, if it discloses or involves mutually fixed connecting parts or structural parts, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, using bolt or screw connection), but also can be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, using casting process integral forming manufacturing) (obviously, except for the integral forming process).

[0053] In addition, the above-mentioned application of any technical solution disclosed in the present application applies to the terms used to represent the position relationship or shape, unless otherwise stated, its meaning includes the approximate, similar or close state or shape.

[0054] Any part provided by the present application can be assembled by a plurality of individual components, or it can be a single component manufactured by integral forming process.

[0055] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit it; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A method of using a wire mesh sandwich panel production and incremental forming integrated device, characterized in that, The metal wire mesh sandwich panel preparation and integrated progressive forming device comprises a clamping mechanism for placing the sandwich panel and a forming and welding mechanism above and below the clamping mechanism, the forming and welding mechanism comprises a main forming tool head structure above the sandwich panel and an auxiliary tool head structure below the sandwich panel, an adjustable power supply is arranged outside the forming and welding mechanism, the main forming tool head structure, the auxiliary tool head structure, the adjustable power supply and the sandwich panel forming area form a first welding closed loop, and the clamping mechanism, the main forming tool head structure and the non-forming area of the sandwich panel form a second welding closed loop. The clamping mechanism comprises a positioning seat, a copper alloy plate and an insulating plate arranged in sequence from top to bottom, the positioning seat is provided with a positioning seat opening in the middle, the copper alloy plate is provided with a copper alloy plate opening in the middle, the positioning seat opening is larger than the copper alloy plate opening, and a stepped surface for placing the sandwich panel is formed between the positioning seat opening and the upper surface of the copper alloy plate, the upper edge of the sandwich panel is provided with an edge pressing plate, and the positioning seat is provided with a fixing clamp above for limiting the edge pressing plate. The main forming tool head structure and the auxiliary tool head structure are symmetrically arranged above and below. The use method of the metal wire mesh sandwich panel preparation and integrated progressive forming device comprises the following steps: (1) starting the machine tool, and starting the sandwich panel preparation and integrated progressive forming device, initially in the sandwich panel forming stage, the forming tool head structure moves on the sandwich panel according to the set forming track to press and form the sandwich panel, the auxiliary tool head structure plays a supporting role, and after the panel material is formed, the current and voltage of the adjustable power supply are adjusted to appropriate values to prepare for the welding step of the panel and the core layer; (2) the area of the sandwich panel that needs to be welded comprises a non-forming area and a forming area, when the non-forming area of the sandwich panel is welded, a switch connected to the copper alloy plate is turned on, the copper alloy plate is connected to the circuit by the conductive clamp, the forming tool head structure, the sandwich panel, the copper alloy plate and the adjustable power supply form a closed loop, the forming tool head moves around the non-forming area, and the copper alloy plate plays a role of conducting electricity and supporting the non-forming area in this process; (3) after the non-forming area is welded, the switch between the copper alloy plate and the adjustable power supply is turned off, the current and voltage of the power supply are automatically adjusted to appropriate values to prepare for the next stage; (4) a switch connected to the auxiliary tool head structure is turned on, and the forming area of the sandwich panel is welded, the forming tool head structure, the sandwich panel, the auxiliary tool head and the adjustable power supply form a closed loop, the forming tool head and the auxiliary tool head structure respectively act as upper and lower electrodes in the loop, the positions of the two tool heads correspond to each other during welding, the heat input of the upper and lower electrodes is consistent, the defect of large welding residual deformation is avoided, the current flows from the forming tool head to the area that needs to be welded, so that the area reaches a local melting state, and finally the upper and lower panels and the core layer are welded together through the combined action of heat and force, so that the panels and the core layer have sufficient connection strength. ​ 2. A method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 1, characterized in that The main forming tool head structure comprises a machine tool spindle, a clamp shell and a forming tool head arranged in sequence from top to bottom, the forming tool head penetrates through the clamp shell and is threadedly connected with the clamp shell, an insulation gasket is arranged between the upper part of the forming tool head and the lower surface inside the clamp shell, and an insulation nut is arranged between the middle part of the forming tool head and the lower surface outside the clamp shell.

3. A method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 2, characterized in that The main forming tool head is externally provided with a compressed air cooling system, the compressed air cooling system comprises a double-sided cooling cylinder sleeved on the outside of the main forming tool head and a compressed gas refrigerator, the outside of the double-sided cooling cylinder is connected with the compressed gas refrigerator through a gas guide pipe, and the inside of the double-sided cooling cylinder is provided with a gas blowing port for blowing cold air to the forming tool head.

4. A method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 3, characterized in that The double-sided cooling cylinder comprises a ring-shaped air inlet cavity, an air outlet cavity and a connecting air pipe for connecting the ring-shaped air inlet cavity and the air outlet cavity, the side of the ring-shaped air inlet cavity is provided with a cold air transmission connector for being connected with the gas guide pipe, and the forming tool head is located inside the air outlet cavity, and the output port of the air outlet cavity is conical.

5. The method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 1, characterized in that, The adjustable power supply is externally provided with a conductive clamp for clamping the copper alloy plate, and the adjustable power supply and the conductive clamp are connected through wires.

6. A method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 2, characterized in that The main forming tool head structure is provided with an infrared thermal imager on the side.

7. A method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 2, characterized in that The clamp shell is provided with a wire fixer on the side.

8. A method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 1, characterized in that The sandwich panel comprises an upper panel, a core layer and a lower panel arranged in sequence from top to bottom.

9. A method of using a device for the integrated production of wire mesh sandwich panels and incremental forming according to claim 1, characterized in that Before step (1) is implemented, first, the oxide film on the surface of the panel and the core layer is cleaned, the core layer is placed between the upper panel and the lower panel, the combined sandwich panel is placed on the copper alloy plate, the position of the sandwich panel is limited by the positioning seat opening of the positioning seat of the clamping mechanism, the edge plate of the clamping mechanism is used to press the sandwich panel, and the fixing clamp of the clamping mechanism is used to clamp the sandwich panel; the forming tool head structure is installed on the machine tool spindle, the wires are fixed by the wire fixer, the wires are connected to the wire connector on the side of the forming tool head structure, the auxiliary tool head structure is connected to the wires in the same way, and is installed on the lower machine tool spindle; the adjustable power supply, the forming tool head structure, the auxiliary tool head structure and the copper alloy plate are sequentially connected and fixed, the switch at the auxiliary tool head and the copper alloy plate is first disconnected, and the circuit is not powered on; after step (4) is implemented, the infrared thermal imager can monitor the temperature distribution of the welding area in real time, the thermal image can be used to judge the welding quality, and the operator can adjust the power voltage and current according to the information, so as to ensure the welding quality; During the welding process, heat is concentrated on the forming tool head structure and the auxiliary tool head structure, in order to avoid that the temperature is too high to affect the service life of the tool head, the compressed air cooling system needs to be started during the welding process, the cooling gas generated by the compressed gas refrigerator is transmitted to the double-sided cooling cylinder through the gas guide pipe, the cooling gas is symmetrically blown to the forming tool head from the inside of the double-sided cooling cylinder, and the forming tool head is quickly cooled; after the welding is completed, the adjustable power supply is turned off, the temperature of the sandwich panel is cooled to room temperature after the infrared thermal imager monitors, the fixing clamp is removed, the workpiece is taken out of the positioning seat, and thus the gradual forming and preparation process of the sandwich panel is completed.

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