A device and method for vacuuming and automatically assembling composite plates before rolling

Abstract

The present invention discloses a device and method for vacuuming and automatically assembling composite plates before rolling. The device includes a frame, a raw material lifting mechanism, an assembling mechanism and a vacuum sealing mechanism. The raw material lifting mechanism transports the composite plate material upward through a liftable carrier to be grabbed by the next mechanism. The assembling mechanism is located on the side of the raw material lifting mechanism and is used to weld and assemble the composite plate once. The vacuum sealing mechanism is located on the frame and on the right side of the assembling mechanism. The vacuum sealing mechanism puts the composite plate welded once into a three-stage vacuum chamber for secondary treatment through a mechanical transfer hand, removes the air between the composite plate layers and completely seals the composite plate. The present invention improves the vacuum degree by supplementing nitrogen, reduces the vacuum degree required for vacuuming, and selectively recycles and reuses the gas using a gas purity detector. While improving production quality and production efficiency, it also greatly reduces the production cost.

Description

Technical Field

[0001] The invention relates to the technical field of plate processing, and in particular to a device and method for vacuuming and automatically assembling composite plates before rolling. Background Art

[0002] The rapid development of science and technology and the emergence of new industries and technologies have put forward higher requirements for the manufacturing industry. Under this situation, the manufacturing industry has been developing towards lightweight and high-performance products with energy saving and resource conservation as its starting point. As a result, people's requirements for basic materials have also become more diversified and advanced. Traditional single-component metal materials are either limited by natural resources or have insufficient comprehensive performance, making it difficult to meet the development requirements of the manufacturing industry. Therefore, the design and preparation of layered metal composites has become an important development direction in the field of materials science and engineering.

[0003] The preparation process of metal composite plates mainly consists of three core steps: pre-rolling treatment, rolling, and post-rolling treatment. At present, in the pre-rolling treatment, vacuum treatment and welding assembly process, when processing composite plates, the composite plates need to be manually welded and shaped first, and then transported to the vacuum chamber for vacuum treatment using handling tools. This is inefficient, has high labor costs, and may also cause problems with weak welding.

[0004] The vacuum electron beam welding equipment for stainless steel composite plate blanks with patent application number 202121166024.6 is capable of squeezing and fixing processing plates of different sizes and thicknesses by setting screw blocks, threaded rods, telescopic cylinders, first sliders, extrusion fixing plates and stepper motors, avoiding movement of the processing plates during welding, and effectively reducing the defective rate of welded parts. However, this patent has the problem of low efficiency during welding due to its overly simple design. The vacuum electron beam groove assembly and sealing welding method for titanium steel composite plates with patent application number 201910843606.4 is to assemble the blanks, weld them on three sides, and then put them into the vacuum electron beam system for vacuum welding. The vacuum processing and welding of this patent are characterized by low efficiency, and cannot guarantee whether the content of air impurities between the layers of the composite plates is qualified, and the quality control of the composite plates cannot be stably guaranteed.

[0005] Therefore, it is necessary to design a device for vacuuming and automatic assembly of composite plates before rolling to improve the production efficiency of composite plates, stably ensure the production quality of composite plates, and save time and labor costs. Summary of the invention

[0006] Based on the above technical problems, the present invention provides a device for vacuuming and automatic assembly before composite plate rolling, which uses a two-step welding method and a three-stage vacuum chamber for composite plate pre-rolling treatment, which can not only greatly improve the preparation efficiency, but also greatly improve the quality of the composite plate, and reduce labor and time costs. The vacuum chamber reduces the air concentration by supplementing nitrogen, thereby reducing the vacuum degree, thereby greatly improving work efficiency, and can reduce energy loss, which has a very good effect on protecting the environment.

[0007] Specifically, the present invention provides a device for vacuuming and automatically assembling composite plates before rolling, comprising a frame, a raw material lifting mechanism, an assembling mechanism and a vacuum sealing and welding mechanism, wherein the raw material lifting mechanism is arranged in front of the assembling mechanism, and the assembling mechanism and the vacuum sealing and welding mechanism are fixed on the frame in sequence; the raw material lifting mechanism comprises a main frame, a guide rod, a carrier, a power transmission mechanism and a first motor, wherein the guide rod is arranged in the main frame, and the carrier is sleeved on the guide rod through the guide frame, and is used for carrying the composite plates during lifting and transportation, wherein the power transmission mechanism is arranged above the main frame, and the first motor is located at the rear side of the main frame and is connected to the transmission shaft of the power transmission mechanism through a belt;

[0008] The blank assembly mechanism includes a transfer mechanism, a clamping and positioning mechanism, a laser welding hand, a first transfer arm, a coating mechanism, a second slide rail, a first bottom plate, a mechanical transfer hand and a third slide rail. The transfer mechanism is fixed on the frame, and absorbs the composite board raw material in the carrier through a suction cup and transfers it to the clamping and positioning mechanism platform. The laser welding hand and the first transfer arm are arranged on the second slide rails on both sides of the first bottom plate. The clamping and positioning mechanism is located on the side of the transfer mechanism. The clamping and positioning mechanism has two clamping sliders arranged transversely and located on the first welding platform, so that transverse and axial clamping and positioning can be performed. The laser welding hand is connected to the second slide rail on the first bottom plate. The coating mechanism includes a gantry bracket and a coating device. The gantry bracket is connected to the second slide rail on the first bottom plate. The coating device is arranged on the crossbeam of the gantry bracket. The mechanical transfer hand is located on the side of the first bottom plate and fixed on the third slide rail on the frame.

[0009] The vacuum sealing mechanism includes a gas purity detector and a three-stage vacuum chamber. The mechanical transfer arm of the assembly mechanism puts the composite plate welded once into the three-stage vacuum chamber for secondary sealing.

[0010] The gas purity detector is arranged on the side wall of the vacuum chamber, and the vacuum chamber comprises a side plate, a second bottom plate, a top plate, a closed door, a first slider frame, a second slider frame, a partition door, a first vacuum chamber, a second vacuum chamber and a third vacuum chamber, wherein the second bottom plate is located on the frame, the side plates are located on both sides of the second bottom plate, the top plate is located above the second bottom plate and connected to the upper ends of the two side plates, the closed door is located at both ends of the second bottom plate, the side plates, the second bottom plate and the top plate together constitute a closed space, a plurality of partition doors are located in the closed space and divide the closed space into a first vacuum chamber, a second vacuum chamber and a third vacuum chamber; the upper ends and lower ends of the plurality of closed doors are respectively connected to the first slider frame and the second slider frame, the first slider frame and the second slider frame can realize lateral movement, and the front ends of the first slider frame and the second slider frame are provided with guide rails, so as to realize axial forward and backward movement of the closed door; the first vacuum chamber is used to remove air between the layers of the composite plate, the second vacuum chamber is used to seal and weld the composite plate, and the third vacuum chamber is used to wait for transportation;

[0011] The first vacuum chamber comprises a first bracket and a blowing mechanism, the first bracket is located on the second bottom plate, the blowing mechanism comprises a mechanical arm, a nesting mechanism, an expansion airbag, a first threaded rod and a second threaded rod, the mechanical arm is located on the side plate, the mechanical arm is provided with a first threaded rod and a second threaded rod, the first threaded rod vertically passes through the front end of the mechanical arm, the second threaded rod horizontally passes through the front end of the mechanical arm and is connected to the nesting mechanism, the first threaded rod and the second threaded rod are matched and transmitted through threads, the nesting mechanism is provided with an expansion airbag, the first threaded rod is rotated to lift the composite plate of the one-time welding assembly and nest the first end of the composite plate into the nesting groove of the nesting mechanism, the first end of the composite plate of the one-time welding assembly is sealed by injecting gas into the expansion airbag, and then nitrogen is injected into the nesting groove of the nesting mechanism to remove interlayer air from the composite plate of the one-time welding assembly;

[0012] The second vacuum chamber comprises a second welding platform, a rotating disk, a laser welder, a second transport arm, a fourth slide rail and a fifth slide rail, wherein the second welding platform is located on the second bottom plate, the rotating disk is located above the second welding platform, the slide on the rotating disk can clamp the composite plate of the primary welding assembly, the laser welder is arranged on the fifth slide rail, the fifth slide rail is arranged on the second welding platform, the second transport arm can be telescopically arranged on the fourth slide rail located on the side plate, and the second transport arm can transport the welded secondary welding composite plate to the third vacuum chamber;

[0013] The third vacuum chamber includes a second bracket, a tensioning device, a conveyor belt and a second motor. The second bracket is located on the second bottom plate. The conveyor belt and the second motor are located on the second bracket. The secondary welded composite plate is conveyed to the tail end of the third vacuum chamber by the conveyor belt.

[0014] Preferably, the transfer mechanism includes a rotating platform, a first slide rail, a cross rail, a lifting cylinder, a photoelectric sensor and a first suction cup. The rotating platform is located on a frame and is provided with a photoelectric sensor. The rotating platform can rotate with the aid of a built-in motor. The first slide rail is slidably and telescopically arranged above the rotating platform. Cross rails are fixedly arranged at both ends of the first slide rail. The lifting cylinder is slidably connected to a slider of the cross rail. The first suction cup is arranged below the lifting cylinder and is integrated with the lifting cylinder.

[0015] Preferably, the clamping and positioning mechanism includes a first welding platform and a clamping slider, the clamping slider is located at both ends of the first welding platform and can be moved and positioned laterally, the clamping slider includes a slider and a mechanical gripper, the mechanical gripper is arranged on the slider, and the gripper of the mechanical gripper can be moved axially forward and backward and positioned.

[0016] Preferably, the gantry support is arranged on a second slide rail, and the lateral movement of the gantry support can be achieved through the second slide rail, and the coating device can move axially forward and backward on the crossbeam of the gantry support.

[0017] Preferably, the power transmission mechanism includes a support seat, a bearing cover, a belt, a rack, a transmission gear and a transmission shaft, the support seat is fixed on the main frame, the bearing cover is arranged on the support seat, the transmission shaft is installed on the support seat through a bearing, the transmission shaft is provided with symmetrically arranged transmission gears, the transmission gears are meshed with the rack, the belt is connected to the output shaft of the first motor, and the rack is connected to the side wall of the carrier.

[0018] Preferably, the tensioning device of the second bracket comprises a tensioning bolt, a tensioning movable bracket and a tensioning roller, and the tensioning device can provide tensioning force for the conveyor belt.

[0019] Preferably, another aspect of the present invention further provides a method for vacuuming and automatically assembling composite plates before rolling, which comprises the following steps:

[0020] S1, transporting the composite board raw material to the clamping height of the transfer mechanism in the composite board assembly mechanism through the raw material lifting mechanism, using the first motor to control the start and stop of the lifting mechanism, and the photoelectric sensor to collect signals;

[0021] S2. After receiving the signal from the photoelectric sensor, the transfer mechanism grabs the target material and places it on the first welding platform. The clamping and positioning mechanism clamps and positions the composite plate. After the first and second composite plates are clamped and positioned, interlayer nickel powder coating is required. When all the raw materials of the three-layer composite plate are clamped and positioned, the laser welding hand welds the two sides of the three-layer composite plate so that the raw materials of the three-layer composite plate are combined into one. Then, the first transfer arm is used to place the composite plate that has been welded once, ready to enter the next process.

[0022] S3. After the primary welding assembly is completed, the transfer robot transports the primary welding composite plate to the three-stage vacuum chamber. The first vacuum chamber, the second vacuum chamber and the third vacuum chamber will be vacuumized. When a certain proportion of the air in the entire vacuum chamber is extracted, nitrogen is injected for dilution. After the remaining air in the chamber is diluted, the vacuumization is continued and this step is repeated. During this process, the gas purity detector continuously performs nitrogen purity detection. Gas with qualified nitrogen purity will be recycled for secondary utilization. This step is repeated until the gas conditions of the three vacuum chambers meet the welding standards and then the vacuumization is stopped. After that, the interlayer gas of the primary welding composite plate is cleared through the blowing mechanism. After completion, the partition door is opened and the primary welding composite plate is sent to the second vacuum chamber for secondary spot welding. After the welding work is completed, the second transfer arm is used to send the composite plate after the secondary spot welding to the conveyor belt of the third vacuum chamber, ready to enter the next process.

[0023] Preferably, in step S3, the first vacuum chamber, the second vacuum chamber and the third vacuum chamber can be evacuated respectively.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention provides a device for vacuuming and automatically assembling composite plates before rolling, which assembles and shapes the substrate and composite plates of the composite plate through a raw material lifting mechanism and an assembling mechanism, and coats the interface layer between the substrate and the composite plates with interlayer nickel powder through a coating mechanism in the assembling mechanism, and then vacuumizes and performs secondary sealing. The whole process is automatically operated by a fully automatic robot, realizing unmanned operation of the whole process and greatly improving production efficiency.

[0026] (2) The three-stage vacuum sealing and welding mechanism proposed in the present invention performs interlayer residual air treatment in the first vacuum chamber, performs secondary welding in the second vacuum chamber to achieve interlayer sealing of the composite plate, and the third vacuum chamber serves as the finished product transfer area. The segmented vacuum chambers are separated from each other by partition doors so that the operations of each vacuum chamber do not interfere with each other. Each time the vacuum sealing and welding process is performed, only the first vacuum chamber or the third vacuum chamber needs to be vacuum diluted, and the entire large vacuum chamber does not need to be vacuum diluted, which greatly reduces the time cost of air treatment.

[0027] (3) The present invention effectively combines the detection and gas guiding functions of the gas purity detector with the three-stage vacuum chamber structure. Each time the vacuum chamber is vacuum treated, only the first vacuum chamber or the third vacuum chamber needs to be vacuum diluted. The gas purity detector located at the upper end of the vacuum chamber can detect the gas purity during the vacuum extraction process. When the nitrogen concentration does not meet the recovery standard, the gas purity detector automatically guides the waste gas to the outdoor air; when the nitrogen concentration reaches the recovery standard but does not meet the composite plate vacuum sealing standard, the gas within the concentration range is recovered, and the gas purity detector guides it into the gas recovery station, so that it can be reused, reducing costs and improving efficiency; until the nitrogen concentration reaches the composite plate vacuum sealing standard, the external vacuum dilution device stops removing air impurities from the vacuum chamber. The effective combination of the gas purity detector, the three-stage vacuum chamber and the nitrogen recovery device can greatly reduce the cost of vacuum treatment of the composite plate.

[0028] (4) This patent study found that according to the empirical formula of vacuum degree and extraction time: It can be known that the vacuum degree is exponentially related to the required time, and through the gas state equation PV=nRT, it can be known that the vacuum degree is proportional to the gas content. Therefore, it can be known that in the traditional vacuuming process, the air content and the required extraction time are exponentially related. In this patent, through the effective combination of gas purity detection and three-stage vacuum, the content of air impurities can be diluted by multiple cycles of extracting air impurities and filling with nitrogen, so that each vacuum extraction process is maintained in the shortest time period, the time is constant, and the air content and the required cycle extraction time increase exponentially. Compared with the traditional vacuuming that reduces the air content and the extraction time required exponentially increases, it has obvious advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an axonometric diagram of a device for vacuuming and automatically assembling composite plates before rolling according to the present invention;

[0030] Figure 2 It is a rear axonometric view of the raw material lifting mechanism of the present invention;

[0031] Figure 3It is a front axonometric view of the raw material lifting mechanism of the present invention;

[0032] Figure 4 It is an axonometric view of the blank assembly mechanism of the present invention;

[0033] Figure 5 It is an axonometric diagram of the transfer mechanism of the present invention;

[0034] Figure 6a It is a front view of the laser welding hand of the present invention;

[0035] Figure 6b It is a front view of the first transport arm of the present invention;

[0036] Figure 7 It is an axonometric view of the clamping and positioning mechanism and the coating mechanism of the present invention;

[0037] Figure 8 is an overview of the vacuum chamber structure of the present invention;

[0038] Fig. 9 A side axonometric view of the vacuum chamber of the present invention;

[0039] Fig.10 It is a structural schematic diagram of the first vacuum chamber of the present invention;

[0040] Fig.11 A schematic diagram of an inflatable airbag according to the present invention;

[0041] Fig.12 is a schematic structural diagram of a second vacuum chamber of the present invention;

[0042] Fig.13 It is a schematic structural diagram of the third vacuum chamber of the present invention.

[0043] Some of the reference numerals in the figure are as follows:

[0044] 1-raw material lifting mechanism; 11-main frame; 12-guide rod; 13-power transmission mechanism; 131-support seat; 132-bearing cover; 134-belt; 135-rack; 136-transmission gear; 137-transmission shaft; 14-first motor; 15-carrier; 2-assembly mechanism; 21-transport mechanism; 211-rotating platform; 212-first slide rail; 213-cross rail; 214-lifting cylinder; 215-photoelectric sensor; 216-first suction cup; 22-clamping and positioning mechanism; 221-first welding platform; 222-clamping slider; 2221-slider; 2222-mechanical gripper; 23-second slide rail; 24-laser welding hand; 241-first support arm; 242-first rotating arm; 243-first telescopic arm; 244-laser head; 25-first transport arm; 251-first rotating arm; 252-second rotating arm; 253-second telescopic arm; 254-second suction cup; 26-painting mechanism; 261-dragon Door bracket; 262-coating device; 27-first bottom plate; 28-mechanical transfer hand; 29-third slide rail; 3-vacuum sealing mechanism; 31-vacuum chamber; 311-side plate; 312-second bottom plate; 313-top plate; 314-closed door; 315-partition door; 32-first slider frame; 33-second slider frame; 34-first vacuum chamber; 341-first bracket; 3421-mechanical arm; 3422-nesting mechanism; 3423-expansion airbag; 3424-first A threaded rod; 3425-a second threaded rod; 35-a second vacuum chamber; 351-a second welding platform; 352-a rotating disk; 353-a laser welder; 354-a second transfer arm; 355-a fourth slide rail; 356-a fifth slide rail; 36-a third vacuum chamber; 361-a second bracket; 3611-a tensioning bolt; 3612-a tensioning movable bracket; 3613-a tensioning roller; 362-a conveyor belt; 363-a second motor; 37-a gas purity detector; 4-a frame. DETAILED DESCRIPTION

[0045] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0046] like Figure 1 As shown, the present invention provides a device for vacuuming and automatically assembling composite plates before rolling, comprising a frame 4, a raw material lifting mechanism 1, an assembling mechanism 2, a vacuum sealing mechanism 3 and a coating mechanism. The raw material lifting mechanism 1 allows the composite plate material to be continuously transported upward through a liftable carrier 15 for grabbing by the next mechanism; the assembling mechanism 2 is arranged at the rear of the raw material lifting mechanism 1, and is used for performing a primary welding and assembling fixation on the composite plate; the vacuum sealing mechanism 3 is fixed on the frame 4 and is arranged at the rear of the assembling mechanism 2. The vacuum sealing mechanism 3 adopts a three-stage arrangement, and is used for vacuum treatment and secondary welding of the composite plate.

[0047] like Figure 2 and Figure 3 As shown, the material lifting mechanism 1 includes a main frame 11, a guide rod 12, a power transmission mechanism 13, a first motor 14 and a carrier 15. The guide rod 12 is arranged vertically in the main frame 11; the power transmission mechanism 13 includes a support seat 131, a bearing cover 132, a belt 134, a rack 135, a transmission gear 136 and a transmission shaft 137. The support seat 131 is welded to the main frame 11, the bearing cover 132 is located on the support seat 131, and the transmission shaft 137 is installed on the support seat 131 through a bearing. There are also symmetrically arranged transmission gears 136 on the transmission shaft 137. The transmission gears 136 are respectively provided with a rack 135 matched therewith. The rack 135 is fixed to the side wall of the carrier 15, and when the rack 135 rotates, it can drive the carrier 15 to move up and down. The first motor 14 is located at the rear of the main frame 11 and is connected to the transmission shaft 137 of the power transmission mechanism 13 through the belt 134. The carrier 15 is sleeved on the guide rod 12 through the guide frame, and moves up and down under the drive of the rack 135, so as to bear the composite board during the up and down lifting and transportation process.

[0048] During operation, the raw material lifting mechanism 1 lifts and transports the composite plate raw material through the first motor 14 and the power transmission mechanism 13. After the photoelectric sensor 215 arranged on the transfer platform 211 senses that the composite plate raw material has risen to a height that can be sucked by the first suction cup 216 of the rotating platform 211, the first motor 14 stops rotating, and the rotating platform 211 transports the composite plate raw material to the clamping and positioning platform 22 for clamping and positioning. The coating mechanism 26 coats the composite plate raw material on the first welding platform 221 with interlayer nickel powder. After the laser welding hand 24 completes the first welding work, the first transfer arm 25 transports the composite plate of the first welding assembly to one side, and then the mechanical transfer arm 28 sends it to the first vacuum chamber 34 for interlayer residual air treatment. After the interlayer residual air treatment is completed, the composite plate of the first welding assembly will be sent to the second vacuum chamber 35 for secondary welding, and finally the composite plate will be closed. Finally, the composite plate that has completed all welding work will be sent to the third vacuum chamber 36 to wait for the next process.

[0049] like Figure 7 As shown, the coating mechanism includes a gantry support 261 and a coating device 262 , and the coating device 262 is arranged on the top of the gantry support 261 .

[0050] During operation, the first motor 14 transmits power through the belt 134 and the power transmission mechanism 13 to slowly raise the height of the object carrier 15, thereby providing a suitable horizontal height for the grabbing work of the next mechanism.

[0051] like Figures 4 to 7As shown, the blank assembly mechanism 2 includes a transfer mechanism 21, a clamping and positioning mechanism 22, a second slide rail 23, a laser welding hand 24, a first transfer arm 25, a coating mechanism 26, a first bottom plate 27, a mechanical transfer hand 28 and a third slide rail 29. The transfer mechanism 21 includes a rotating platform 211, a first slide rail 212, a cross rail 213, a lifting cylinder 214, a photoelectric sensor 215 and a first suction cup 216. The rotating platform 211 is located on the frame 4 and has a photoelectric sensor 215. It can be rotated by a built-in motor. The first slide rail 212 is located above the rotating platform 211 and can be telescopically slid back and forth. The cross rail 213 is fixed between the two first slide rails 212. The first suction cup 216 is arranged below the lifting cylinder 214 and is integrally arranged with the lifting cylinder 214. The lifting cylinder 214 is slidably arranged on the cross rail 213 and can move back and forth on the cross rail 213 to position and absorb different composite board materials.

[0052] The clamping and positioning mechanism 22 includes a first welding platform 221 and a clamping slider 222. The first welding platform 221 is located on the first base plate 27. The clamping slider 222 is located at both ends of the first welding platform 221 and can move laterally to achieve lateral (left and right) positioning. The clamping slider 222 includes a slider 2221 and a mechanical gripper 2222. The mechanical gripper 2222 is located in the slider 2221. The gripper of the mechanical gripper 2222 can move axially (forward and backward) to achieve axial (forward and backward) positioning. The laser welding arm 24 and the first transfer arm 25 are respectively located on the second slide rails 23 on both sides of the first base plate 27. The laser welding arm 24 includes a first support arm 241, a first rotating arm 242, a first telescopic arm 243 and a laser head 244, and can move back and forth horizontally (left and right); the first support arm 241 is fixed on the second slide rail 23 on one side, the first end of the first rotating arm 242 is connected to the upper end of the first support arm 241, the second end of the first rotating arm 242 is connected to the first end of the first telescopic arm 243, and the laser head 244 is arranged at the second end of the first telescopic arm 243.

[0053] The first transfer arm 25 includes a second support arm 251, a second rotating arm 252, a second telescopic arm 253 and a second suction cup 254. The second support arm 251 is fixed on the second slide rail 23 on one side. The first end of the second rotating arm 252 is connected to the upper end of the second support plate 251, the second end of the second rotating arm 252 is connected to the first end of the second telescopic arm 253, and the second suction cup 254 is arranged at the second end of the second telescopic arm 253.

[0054] The third slide rail 29 is fixedly arranged on the frame 4 at one end of the first bottom plate 27 close to the vacuum sealing mechanism 3; the mechanical transfer arm 28 is placed on the third slide rail 29 and can move in the lateral (left and right) direction, and the composite plate of the one-time welding assembly is transported by the mechanical transfer arm 28.

[0055] During operation, when the rotating platform 211 rotates to the designed position, the photoelectric sensor 215 continuously senses the position of the composite board raw material, and the raw material lifting mechanism 1 continuously and slowly raises the height of the composite board raw material until the first motor 14 stops operating and the carrier 15 stops rising after receiving the signal from the photoelectric sensor 215. At the same time, the transfer mechanism 21 uses the lifting cylinder 214 and the first suction cup 216 to absorb the raw material, and the cross rail 213 can make the lifting cylinder 214 move back and forth on the cross rail 213, so as to facilitate the selection of different materials (substrates) at different positions on the carrier 15. Or composite plate), the composite plate raw material is transferred to the first welding platform 221 through the transfer mechanism 21, and is clamped and positioned by the clamping and positioning function of the clamping and positioning mechanism 22. The coating mechanism 26 coats the interlayer nickel powder after the composite plate raw material is clamped and positioned. After all the raw materials are clamped, the first welding and fixing work is performed by the laser welding hand 24 distributed on the second slide rail 23 on the side of the first bottom plate 27. After the welding is completed, the first transfer arm 25 will transfer the primary welded part to the vacant place at the right end of the first bottom plate 27, waiting for the mechanical transfer arm 28 to transport it to the next process.

[0056] like Fig. 9 As shown, the vacuum sealing mechanism 3 includes a vacuum chamber 31 and a gas purity detector 37; a plurality of gas purity detectors 37 are evenly installed on one side of the vacuum chamber 31 and connected to the vacuum chamber 31 through a pipeline for detecting the gas purity inside the vacuum chamber 31.

[0057] During operation, the vacuum equipment evacuates the vacuum chamber 31 through the pipeline so that the content of air impurities ρ≤1%, and detects the air content in the pipeline through the gas purity detector 37 located on the pipeline. If the content does not meet the standard, the gas flow direction is controlled through the reversing valve of the gas purity detector 37, the gas with high air content is treated as waste gas, and the gas with air content reaching the minimum recovery standard is recycled and collected.

[0058] like Figure 8 and Fig. 9As shown, the vacuum chamber 31 includes a side plate 311, a second bottom plate 312, a top plate 313, a closed door 314, a partition door 315, a first slider frame 32, a second slider frame 33, a first vacuum chamber 34, a second vacuum chamber 35 and a third vacuum chamber 36. The entire closed space of the vacuum chamber 31 is composed of the side plate 311, the second bottom plate 312, the top plate 313 and the closed door 314. The first slider frame 32 and the second slider frame 33 are respectively placed on the top plate 313 and the bottom plate 312, and are connected to the upper and lower ends of the closed door 314, and the closed door 314 can slide. The two internal partition doors 315 isolate the vacuum chamber 31 into the first vacuum chamber 34, the second vacuum chamber 35 and the third vacuum chamber 36, and the first vacuum chamber 34, the second vacuum chamber 35 and the third vacuum chamber 36 are used as the space for interlayer air treatment, sealing and welding treatment and finished product transfer area respectively.

[0059] During operation, the closed door 314 at the entrance of the first end (i.e., the left end in the figure) is opened, and the mechanical transfer arm 28 puts the composite plate after the first welding assembly into the first vacuum chamber 34 to deal with the residual air between the composite plate layers. After the residual air is removed, the first partition door 315 is opened, and the composite plate after the first welding assembly is transferred to the second vacuum chamber 35 for closed welding at the second end. After the second welding is completed, the second partition door 315 is opened, and the composite plate after the second welding will be sent to the third vacuum chamber 36, waiting to be transferred to the next process.

[0060] like Fig.10 and Fig.11 As shown, the first vacuum chamber 34 includes a first bracket 341 and a blowing mechanism; the first bracket 341 is fixed on the second bottom plate 312. The blowing mechanism includes a mechanical arm 3421, a nesting mechanism 3422, an expansion airbag 3423, a first threaded rod 3424 and a second threaded rod 3425. The mechanical arm 3421 is fixed on the side plate 311 on one side of the first vacuum chamber 34 and can be telescoped longitudinally (front and back). The suction mechanism of the mechanical arm 3421 can realize the lifting function in the vertical direction through the first threaded rod 3424. There is also a nesting mechanism 3422 with a guide rod 12 on the mechanical arm 3421. The second threaded rod 3425 is vertically arranged with the first threaded rod 3424 and moves through threaded matching. The nesting groove 34221 on the nesting mechanism 3422 covers one end of the composite plate. The expansion airbag 3423 is distributed around the inner wall of the nesting groove 34221. After being expanded by injecting gas, the nesting groove can form a sealing effect on one end of the covered composite plate.

[0061] During operation, the vacuum equipment will extract the air in the first vacuum chamber 34 and replace it with nitrogen. After the gas replacement is completed, the robotic arm 3421 will use the first threaded rod 3424 with a suction cup to absorb. At the same time, the second threaded rod 3425 of the nesting mechanism 3422 will control the nesting mechanism 3422 to retract to the right under the action of the first threaded rod 3424 until the left end of the composite plate is completely covered by the embedding groove of the nesting mechanism 3422, and the expansion airbag 3423 is injected with gas to seal the embedding groove 34221. After the sealing is completed, the blowing mechanism 342 will blow air to the sealing area through the air holes of the embedding groove to clean up the residual air between the layers of the composite plate.

[0062] like Fig.12 As shown, the second vacuum chamber 35 includes a second welding platform 351, a rotating disk 352, a laser welder 353, a second transport arm 354, a fourth slide rail 355 and a fifth slide rail 356. The second welding platform 351 is fixed to the second bottom plate 312 through four columns; the rotating disk 352 is located above the second welding platform 351, and the slide plate on the rotating disk 352 can clamp the composite plate welded once; the laser welder 353 can move horizontally (left and right) through the fifth slide rail 356, and realize the welding and sealing work of the composite plate welded once; the second transport arm 354 is located on the fourth slide rail 355 on the side plate 311, and can be retracted back and forth, and the welded secondary welded composite plate can be transported to the third vacuum chamber 36.

[0063] During operation, the second transfer arm 354 locates and grabs the once-welded composite plate through the object capture camera in the second vacuum chamber 35, and then places it on the rotating disk 352 on the second welding platform 351. The rotating disk 352 rotates 90 degrees, and the laser welder 353 then moves on the fifth slide rail 356 to locate the welding position and prepare to start welding. After the welding of the first side is completed, the rotating disk 352 continues to rotate 180 degrees to weld the other side. After all welding work is completed, the second transfer arm 354 grabs the second-welded composite plate and transports it to the conveyor belt 362 of the third vacuum chamber 36.

[0064] like Fig.13 As shown, the third vacuum chamber 36 includes a second bracket 361, a tensioning bolt 3611, a tensioning movable bracket 3612, a tensioning roller 3613, a conveyor belt 362 and a second motor 363. The second bracket 361 is arranged on the second bottom plate 312, and the conveyor belt 362 and the second motor 363 are arranged on the second bracket 361; the tensioning bolt 3611, the tensioning movable bracket 3612 and the tensioning roller 3613 constitute a tensioning device of the second bracket 361, which can provide tensioning force for the conveyor belt 362 and maintain the stability of the conveyor belt 362. The composite plate after secondary welding is conveyed to the tail end of the third vacuum chamber 36 through the conveyor belt 362.

[0065] During operation, the conveyor belt 362 conveys the secondary welded composite plate from the second vacuum chamber 35 to the tail end of the third vacuum chamber 36, waiting to enter the next process. When the conveyor belt 362 becomes loose, the tensioning device can raise the tensioning movable bracket 3612 and the tensioning roller 3613 by tightening the tensioning bolt 3611, thereby increasing the tensioning force of the conveyor belt 362 and maintaining the overall stability of the conveyor belt 362.

[0066] The present invention provides a specific implementation scheme, and the specific steps are as follows:

[0067] S1. The raw material of the composite board is transported to a height where the transfer mechanism 21 in the composite board assembly mechanism 2 can clamp the raw material through the raw material lifting mechanism 1. The first motor 14 controls the start and stop of the lifting mechanism through the signal transmitted by the photoelectric sensor 215 located in the transfer mechanism 21.

[0068] S2. After receiving the signal from the photoelectric sensor 215, the transfer mechanism 21 in the assembly mechanism 2 grabs the target material and places it on the first welding platform 221. The clamping and positioning mechanism 22 clamps and positions the composite plate. After the first clamping and positioning and the second clamping and positioning are completed, the interlayer nickel powder needs to be coated. When all the raw materials of the three-layer composite plate are clamped and positioned, the laser welding arm 24 welds the two sides of the composite plate to combine the raw materials of the three-layer composite plate into one. Then, the first transfer arm 25 is used to place the composite plate that has been welded once aside, ready to enter the next process.

[0069] S3. After the primary welding assembly is completed, the transfer robot 28 transports the primary welded composite plate to the vacuum chamber 31 of the three-stage distribution structure. The first vacuum chamber 34, the second vacuum chamber 35, and the third vacuum chamber 36 will be evacuated. After 2 / 3 of the air in the entire vacuum chamber 31 is extracted, nitrogen is injected for dilution. After the remaining air in the chamber is diluted, the vacuum treatment is continued and this step is repeated. During this process, the gas purity detector 37 will continuously perform gas (nitrogen) purity detection, and unqualified gas will be discharged. The nitrogen gas with qualified purity will be recycled for secondary use until the gas conditions of all segmented vacuum chambers 31 meet the welding standards and stop vacuuming. After the gas conditions are prepared, the interlayer gas of the primary welded composite plate is cleared by the blowing mechanism 342. After completion, the partition door 315 is opened and the primary welded composite plate is sent to the second vacuum chamber 35 for the remaining welding work. After the welding work is completed, the second transfer arm 354 will be used to send the secondary welded composite plate to the conveyor belt 362 of the third vacuum chamber 36 to prepare for the next process. After the first vacuum treatment, the subsequent vacuum treatment only needs to vacuum the first vacuum chamber 34 and the third vacuum chamber 36, which reduces the time of vacuum treatment and improves the overall work efficiency.

[0070] In the embodiments of this patent, through the effective combination of gas purity detection and three-stage vacuum, the content of air impurities can be diluted by multiple cycles of extracting air impurities and filling with nitrogen, so that each vacuum extraction process is maintained in the shortest time period, the time is constant, and the air content increases exponentially with the required cycle extraction time, greatly improving the efficiency of vacuum extraction.

[0071] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for vacuuming and automatically assembling composite plates before rolling, characterized in that: It includes a frame, a raw material lifting mechanism, a blank assembly mechanism and a vacuum sealing mechanism, wherein the raw material lifting mechanism is arranged in front of the blank assembly mechanism, and the blank assembly mechanism and the vacuum sealing mechanism are fixed on the frame in sequence; The raw material lifting mechanism includes a main frame, a guide rod, a carrier, a power transmission mechanism and a first motor, wherein the guide rod is arranged in the main frame, the carrier is sleeved on the guide rod through the guide frame, and is used for carrying the composite board during lifting and transportation, the power transmission mechanism is arranged above the main frame, and the first motor is located at the rear side of the main frame and is connected to the transmission shaft of the power transmission mechanism through a belt; The blank assembly mechanism includes a transfer mechanism, a clamping and positioning mechanism, a laser welding hand, a first transfer arm, a coating mechanism, a second slide rail, a first bottom plate, a mechanical transfer hand and a third slide rail. The transfer mechanism is fixed on the frame, and absorbs the composite board raw material in the carrier through a suction cup and transfers it to the clamping and positioning mechanism platform. The laser welding hand and the first transfer arm are arranged on the second slide rails on both sides of the first bottom plate. The clamping and positioning mechanism is located on the side of the transfer mechanism. The clamping and positioning mechanism has two clamping sliders arranged transversely and located on the first welding platform, so that transverse and axial clamping and positioning can be performed. The laser welding hand is connected to the second slide rail on the first bottom plate. The coating mechanism includes a gantry bracket and a coating device. The gantry bracket is connected to the second slide rail on the first bottom plate. The coating device is arranged on the crossbeam of the gantry bracket. The mechanical transfer hand is located on the side of the first bottom plate and fixed on the third slide rail on the frame. The vacuum sealing mechanism includes a gas purity detector and a three-stage vacuum chamber. The mechanical transfer arm of the assembly mechanism puts the composite plate welded once into the three-stage vacuum chamber for secondary sealing. The gas purity detector is arranged on the side wall of the vacuum chamber, and the vacuum chamber comprises a side plate, a second bottom plate, a top plate, a closed door, a first slider frame, a second slider frame, a partition door, a first vacuum chamber, a second vacuum chamber and a third vacuum chamber, wherein the second bottom plate is located on the frame, the side plates are located on both sides of the second bottom plate, the top plate is located above the second bottom plate and connected to the upper ends of the two side plates, the closed door is located at both ends of the second bottom plate, the side plates, the second bottom plate and the top plate together constitute a closed space, a plurality of partition doors are located in the closed space and divide the closed space into a first vacuum chamber, a second vacuum chamber and a third vacuum chamber; the upper ends and lower ends of the plurality of closed doors are respectively connected to the first slider frame and the second slider frame, the first slider frame and the second slider frame can realize lateral movement, and the front ends of the first slider frame and the second slider frame are provided with guide rails, so as to realize axial forward and backward movement of the closed door; the first vacuum chamber is used to remove air between the layers of the composite plate, the second vacuum chamber is used to seal and weld the composite plate, and the third vacuum chamber is used to wait for transportation; The first vacuum chamber comprises a first bracket and a blowing mechanism, the first bracket is located on the second bottom plate, the blowing mechanism comprises a mechanical arm, a nesting mechanism, an expansion airbag, a first threaded rod and a second threaded rod, the mechanical arm is located on the side plate, the mechanical arm is provided with a first threaded rod and a second threaded rod, the first threaded rod vertically passes through the front end of the mechanical arm, the second threaded rod horizontally passes through the front end of the mechanical arm and is connected to the nesting mechanism, the first threaded rod and the second threaded rod are matched and transmitted through threads, the nesting mechanism is provided with an expansion airbag, the first threaded rod is rotated to lift the composite plate of the one-time welding assembly and nest the first end of the composite plate into the nesting groove of the nesting mechanism, the first end of the composite plate of the one-time welding assembly is sealed by injecting gas into the expansion airbag, and then nitrogen is injected into the nesting groove of the nesting mechanism to remove interlayer air from the composite plate of the one-time welding assembly; The second vacuum chamber comprises a second welding platform, a rotating disk, a laser welder, a second transport arm, a fourth slide rail and a fifth slide rail, wherein the second welding platform is located on the second bottom plate, the rotating disk is located above the second welding platform, the slide on the rotating disk can clamp the composite plate of the primary welding assembly, the laser welder is arranged on the fifth slide rail, the fifth slide rail is arranged on the second welding platform, the second transport arm can be telescopically arranged on the fourth slide rail located on the side plate, and the second transport arm can transport the welded secondary welding composite plate to the third vacuum chamber; The third vacuum chamber includes a second bracket, a tensioning device, a conveyor belt and a second motor. The second bracket is located on the second bottom plate. The conveyor belt and the second motor are located on the second bracket. The secondary welded composite plate is conveyed to the tail end of the third vacuum chamber by the conveyor belt.

2. The device for vacuuming and automatically assembling composite plates before rolling according to claim 1 is characterized in that: The transfer mechanism includes a rotating platform, a first slide rail, a cross rail, a lifting cylinder, a photoelectric sensor and a first suction cup. The rotating platform is located on a frame and is provided with a photoelectric sensor. The rotating platform can rotate with the aid of a built-in motor. The first slide rail is slidably and telescopically arranged above the rotating platform. Cross rails are fixedly arranged at both ends of the first slide rail. The lifting cylinder is slidably connected to a slider on the cross rail. The first suction cup is arranged below the lifting cylinder and is integrated with the lifting cylinder.

3. The device for vacuuming and automatically assembling composite plates before rolling according to claim 1 is characterized in that: The clamping and positioning mechanism includes a first welding platform and a clamping slider. The clamping slider is located at both ends of the first welding platform and can be moved and positioned laterally. The clamping slider includes a slider and a mechanical gripper. The mechanical gripper is arranged on the slider, and the gripper of the mechanical gripper can be moved axially forward and backward and positioned.

4. The device for vacuuming and automatically assembling composite plates before rolling according to claim 1 is characterized in that: The gantry support is arranged on the second slide rail, and the lateral movement of the gantry support can be realized through the second slide rail. The coating device can move axially forward and backward on the crossbeam of the gantry support.

5. The device for vacuuming and automatically assembling composite plates before rolling according to claim 1 is characterized in that: The power transmission mechanism includes a support seat, a bearing cover, a belt, a rack, a transmission gear and a transmission shaft. The support seat is fixed on the main frame, the bearing cover is arranged on the support seat, the transmission shaft is installed on the support seat through a bearing, the transmission shaft is provided with symmetrically arranged transmission gears, the transmission gears are meshed with the rack, the belt is connected to the output shaft of the first motor, and the rack is connected to the side wall of the carrier.

6. The device for vacuuming and automatically assembling composite plates before rolling according to claim 1, characterized in that: The tensioning device of the second bracket includes a tensioning bolt, a tensioning movable bracket and a tensioning roller, and the tensioning device can provide tensioning force for the conveyor belt.

7. A method for vacuuming and automatically assembling composite plates before rolling based on the device for vacuuming and automatically assembling composite plates before rolling according to claim 1, characterized in that: It includes the following steps: S1, transporting the composite board raw material to the clamping height of the transfer mechanism in the composite board assembly mechanism through the raw material lifting mechanism, using the first motor to control the start and stop of the lifting mechanism, and the photoelectric sensor to collect signals; S2. After receiving the signal from the photoelectric sensor, the transfer mechanism grabs the target material and places it on the first welding platform. The clamping and positioning mechanism clamps and positions the composite plate. After the first and second composite plates are clamped and positioned, interlayer nickel powder coating is required. When all the raw materials of the three-layer composite plate are clamped and positioned, the laser welding hand welds the two sides of the three-layer composite plate so that the raw materials of the three-layer composite plate are combined into one. Then, the first transfer arm is used to place the composite plate that has been welded once, ready to enter the next process. S3. After the primary welding assembly is completed, the transfer robot transports the primary welding composite plate to the three-stage vacuum chamber. The first vacuum chamber, the second vacuum chamber and the third vacuum chamber will be vacuumized. When a certain proportion of the air in the entire vacuum chamber is extracted, nitrogen is injected for dilution. After the remaining air in the chamber is diluted, the vacuumization is continued and this step is repeated. During this process, the gas purity detector continuously performs nitrogen purity detection. Gas with qualified nitrogen purity will be recycled for secondary utilization. This step is repeated until the gas conditions of the three vacuum chambers meet the welding standards and then the vacuumization is stopped. After that, the interlayer gas of the primary welding composite plate is cleared through the blowing mechanism. After completion, the partition door is opened and the primary welding composite plate is sent to the second vacuum chamber for secondary spot welding. After the welding work is completed, the second transfer arm is used to send the composite plate after the secondary spot welding to the conveyor belt of the third vacuum chamber, ready to enter the next process.

8. The method for vacuuming and automatically assembling composite plates before rolling according to claim 7, characterized in that: In step S3, the first vacuum chamber, the second vacuum chamber and the third vacuum chamber can be evacuated respectively.

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