Dewar flask ring welding device and ring welding method

Abstract

The invention discloses a Dewar flask ring welding device and a ring welding method. The Dewar flask ring welding device comprises a rack, a control module, a fixed rotating component, a product carrying component, a laser welding component and an exhaust component, and all functional components are electrically connected with the control module and assembled on the rack. The product carrying component automatically takes, places and carries a Dewar flask spot welding product and introduces shielding gas, the fixed rotating component achieves accurate clamping and rotating of the product, the laser welding component completes laser welding after recognizing the welding seam position and the welding spot oxidation condition through the visual detection unit, and the exhaust component recycles welding smoke. By means of automatic collaborative operation, manual clamping and welding operation is replaced, the production efficiency and the welding quality are greatly improved, the labor cost is reduced, the large-scale production requirement is met, and a guarantee is provided for the detection precision of the refrigeration type infrared detector.

Description

Technical Field

[0001] This invention relates to the field of Dewar flask welding technology, specifically to a Dewar flask ring welding device and ring welding method. Background Technology

[0002] Currently, cooled infrared detector technology is undergoing a transformation from "military-dominated" to "dual-driven by military and civilian applications," with core cooling technology, domestic material production, and AI integration becoming the main development themes. With technological iteration and the release of market demand, cooled infrared detectors will evolve towards higher performance, lower cost, and wider applications, becoming one of the core sensors in the era of the Internet of Things and intelligent sensing. As a key component of cooled infrared detectors, the welding quality of the Dewar flask plays a decisive role in the detection accuracy of the detector.

[0003] A Dewar flask is composed of multiple Dewar flask parts, such as a lead ring, outer tube blank, flange, and inner tube, stacked coaxially, and then spot-welded at the contact points of adjacent Dewar flask parts. Currently, when welding Dewar flasks, the products are often manually clamped to ensure that the welding position is not misaligned before welding. This increases the cost of manual welding and makes it difficult to meet the needs of large-scale production. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a Dewar bottle ring welding device and ring welding method.

[0005] This invention discloses a Dewar bottle ring welding device, including a frame, a control module, and a fixed rotating component, a product handling component, a laser welding component, and an exhaust component arranged on the frame. The fixed rotating component, the product handling component, and the laser welding component are all electrically connected to the control module.

[0006] The fixed rotating component is used to clamp and fix the Dewar bottle spot-welded product;

[0007] The product handling component is used to pick up, place, and transport Dewar bottle spot-welded products and to introduce protective gas into the products.

[0008] The laser welding component is used to identify weld seams, weld oxidation conditions, and perform laser welding on Dewar bottle spot-welded products.

[0009] The exhaust system is used to recover the fumes generated during laser welding.

[0010] As a further improvement of the present invention, the fixed rotating component includes a servo rotating hollow platform, a mounting base assembly, and a worktable connected in sequence. The servo rotating hollow platform is mounted on the frame and can drive the mounting base assembly and the worktable to rotate. The worktable is used to carry the Dewar flask spot welding product. The mounting base assembly is provided with a first force-controlled gripper and two first irregularly shaped grippers slidably disposed on the top surface of the worktable. The first force-controlled gripper is convexly connected to the first irregularly shaped grippers and can drive the first irregularly shaped grippers on both sides to slide closer to or further away to clamp or release the Dewar flask spot welding product. The servo rotating hollow platform and the first force-controlled gripper are both signal connected to the control module.

[0011] As a further improvement of the present invention, the mounting base assembly includes a mounting base plate, a supporting base plate, and a worktable base connected sequentially from top to bottom. The supporting base plate is provided with a gripper mounting plate, and the first force-controlled gripper is assembled on the gripper mounting plate. The worktable is provided with cross roller slides and slide pads on both sides. The first irregularly shaped gripper finger is connected to the cross roller slide. The first force-controlled gripper finger is connected to the cross roller slide through a driving finger and a driving finger connecting plate.

[0012] As a further improvement of the present invention, the product handling component includes a first horizontal module mounting component, a horizontal transfer mechanism, a vertical transfer mechanism, and a gripper mechanism; the horizontal transfer mechanism is mounted on the frame via the first horizontal module mounting component; the vertical transfer mechanism is connected to the horizontal transfer mechanism and can be driven to move horizontally by it; the gripper mechanism is connected to the vertical transfer mechanism and can be driven to move vertically by it.

[0013] The gripper mechanism includes a second force-controlled gripper, a second irregularly shaped gripper finger, and a protective gas tube. The second force-controlled gripper finger is signal-connected to the control module to drive the second irregularly shaped gripper finger to clamp or release the Dewar flask spot welding product. The protective gas tube is used to introduce protective gas into the Dewar flask spot welding product.

[0014] As a further improvement of the present invention, the gripper mechanism further includes a gripper mounting base plate and a gripper mounting plate connected in sequence, the gripper mounting base plate being connected to the vertical transfer mechanism; the second force-controlled gripper is mounted on the gripper mounting plate and is connected to the second irregular gripper finger through a gripper pad; the gripper mounting plate is provided with a protective gas pipe mounting block, and the protective gas pipe is mounted on the protective gas pipe mounting block.

[0015] As a further improvement of the present invention, the laser welding component includes a second horizontal module mounting component, a horizontal welding transfer mechanism, a vertical welding transfer mechanism, and a welding head translation mechanism; the horizontal welding transfer mechanism is mounted on the frame via the second horizontal module mounting component; the vertical welding transfer mechanism is connected to the horizontal welding transfer mechanism and can be driven by it to move horizontally, and the welding head translation mechanism is connected to the vertical welding transfer mechanism and can be driven by it to move vertically;

[0016] The welding head translation mechanism integrates a laser welding unit, a vision inspection unit, a translation unit, and a side-axis air blowing micro-adjustment mechanism. The vision inspection unit and the laser welding unit are both signal-connected to the control module. The vision inspection unit is used to identify the weld position and the oxidation status of the weld point. The laser welding unit is used to perform spot welding and ring welding operations. The translation unit is used to drive the laser welding unit, the vision inspection unit, and the side-axis air blowing micro-adjustment mechanism to synchronously adjust the horizontal feed. The side-axis air blowing micro-adjustment mechanism is used to blow protective gas to the weld point in multiple directions.

[0017] As a further improvement of the present invention, the translation unit includes a translation mounting frame, a linear guide rail, a low-speed cylinder, and a welding head mounting plate assembly;

[0018] The translational mounting frame is connected to the welding vertical transfer mechanism. The linear guide rail and the low-speed cylinder are assembled on the translational mounting frame. The welding head mounting plate assembly is slidably connected to the linear guide rail. The laser welding unit, the vision inspection unit, the ring light source, and the off-axis air blowing micro-adjustment mechanism are all assembled on the welding head mounting plate assembly. The low-speed cylinder can drive the welding head mounting plate assembly to translate along the linear guide rail.

[0019] As a further improvement of the present invention, the off-axis air blowing micro-adjustment mechanism includes an adjustment frame, an adjustment vertical transplanting mechanism, an XYθ alignment platform, a pitch platform, and an off-axis protection air assembly.

[0020] The adjustment frame is connected to the welding head mounting plate assembly. The vertical adjustment and transfer mechanism is assembled on the adjustment frame and can drive the XYθ alignment platform to translate along the Z-axis. The XYθ alignment platform can drive the pitch platform to translate along the X-axis and Y-axis and rotate around the θ-axis. The off-axis protective gas assembly is connected to the pitch platform through a gas pipe mounting component. The off-axis protective gas assembly includes an off-axis protective gas pipe and a protective gas nozzle connected in sequence, which can accurately blow protective gas to the welding point from multiple directions.

[0021] This invention discloses a method for welding Dewar bottle rings, which is applied to the aforementioned Dewar bottle ring welding apparatus, characterized in that it includes:

[0022] The second force-controlled gripper of the product handling component drives the second irregularly shaped gripper to grasp the Dewar bottle spot welding product, which is then transferred to the worktable of the fixed rotating component via the horizontal and vertical transfer mechanisms. The first force-controlled gripper of the fixed rotating component drives the first irregularly shaped gripper to slide closer and clamp the Dewar bottle spot welding product.

[0023] Adjust the position of the product handling components so that the protective gas tube is aligned with the inside of the Dewar bottle for spot welding and protective gas is introduced. Maintain this position for a preset time to expel the internal air.

[0024] The vision inspection unit of the laser welding component identifies the weld position and sends it to the control module. The control module drives the fixed rotating component to adjust the weld position, and at the same time controls the translation unit to drive the laser welding unit, vision inspection unit and off-axis air blowing micro-adjustment mechanism to feed synchronously. The off-axis air blowing micro-adjustment mechanism adjusts the position of the protective gas nozzle through the XYθ alignment platform and the pitch platform, and performs spot welding after aligning the laser welding unit with the weld.

[0025] The visual inspection unit identifies the oxidation of the spot weld and feeds it back to the control module. After the control module confirms that there are no abnormalities, it completes the ring welding in conjunction with the rotation of the fixed rotating component.

[0026] After the ring welding is completed, the fixed rotating component releases the product, and the product handling component grabs the ring-welded product and moves it away from the workbench, completing the unloading.

[0027] As a further improvement of the present invention, during the welding process, the exhaust component continuously recovers the welding fumes.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] This invention integrates a fixed rotating component, a product handling component, a laser welding component, an exhaust component, and a control module to construct a fully automated Dewar bottle ring welding system. This system completely replaces manual clamping, position adjustment, and welding operations, requiring no manual intervention throughout the process. It significantly reduces labor costs and efficiently meets the large-scale production needs under the background of military-civilian integration.

[0030] This invention utilizes the weld seam recognition and weld oxidation identification functions of laser-welded components, combined with the precise control of the control module, to avoid subjective errors from manual operation and ensure consistent welding quality. At the same time, the product handling component can introduce protective gas into the product, and the exhaust component can recover welding fumes, which reduces weld oxidation and purifies the production environment, providing a key guarantee for the detection accuracy of the cooled infrared detector.

[0031] This invention achieves automated and coordinated operation of various processes through signal connection between each component and the control module, eliminating the need for manual intervention and significantly improving production efficiency. Furthermore, each core component has a clearly defined function and works closely together, simplifying the operation process while ensuring welding accuracy and product quality, and further adapting to the high-efficiency production needs of Dewar flasks under the background of military-civilian integration. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the Dewar bottle ring welding device disclosed in one embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of the fixed rotating component of the Dewar bottle ring welding device disclosed in one embodiment of the present invention;

[0034] Figure 3 This is an assembly diagram of the first force control gripper and the first irregular-shaped gripper finger of the Dewar bottle ring welding device disclosed in an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the product handling component of a Dewar bottle ring welding device disclosed in one embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the gripper mechanism of a Dewar bottle ring welding device disclosed in one embodiment of the invention;

[0037] Figure 6 A schematic diagram of the structure of the laser welding component of the Dewar bottle ring welding device disclosed in one embodiment of the present invention;

[0038] Figure 7 A schematic diagram of the laser welding component of the Dewar bottle ring welding device disclosed in one embodiment of the present invention from another angle;

[0039] Figure 8 A schematic diagram of the welding head translation mechanism of a Dewar bottle ring welding device disclosed in one embodiment of the present invention;

[0040] Figure 9 A schematic diagram of the welding head translation mechanism of the Dewar bottle ring welding device disclosed in one embodiment of the present invention from another angle;

[0041] Figure 10 A schematic diagram of the welding head translation mechanism at another angle of the Dewar bottle ring welding device disclosed in one embodiment of the invention;

[0042] Figure 11 A schematic diagram of the off-axis air blowing micro-adjustment mechanism of a Dewar bottle ring welding device disclosed in one embodiment of the invention.

[0043] In the picture:

[0044] 01. Rack;

[0045] 02. Fixed rotating component; 0201. Servo-driven rotating hollow platform; 0202. Mounting base plate; 0203. Supporting base plate; 0204. Workbench base; 0205. Workbench; 0206. First irregularly shaped gripper finger; 0207. First force-controlled gripper; 0208. Protective cover; 0209. Slide pad; 0210. Cross roller slide; 0211. Gripper mounting plate; 0212. Drive finger; 0213. Drive finger connecting plate; 0214. First adjustment component;

[0046] 03. Product handling components; 0301. First horizontal module mounting component; 0302. Horizontal transfer mechanism; 0303. Vertical transfer mechanism; 0304. Gripper mechanism; 030401. Gripper mounting base plate; 030402. Gripper mounting plate; 030403. Second force-controlled gripper; 030404. Gripper pad; 030405. Second irregularly shaped gripper finger; 030406. Protective air pipe mounting block; 030407. Protective air pipe; 0305. Fixed end mounting plate of the horizontal transfer mechanism cable chain; 0306. Moving end mounting plate of the horizontal transfer mechanism cable chain; 0307. Fixed end mounting plate of the vertical transfer mechanism cable chain; 0308. Moving end mounting plate of the vertical transfer mechanism cable chain; 0309. Second adjustment component;

[0047] 04. Laser welding components; 0401. Second horizontal module mounting components; 0402. Welding horizontal transfer mechanism; 0403. Welding vertical transfer mechanism; 0404. Welding head translation mechanism; 0405. Third adjustment assembly; 040401. Translation mounting plate; 040402. Translation mounting base plate; 040403. Translation mounting reinforcing rib; 040404. Low-speed cylinder; 040405. Linear guide rail; 040406. Welding head mounting base plate; 040407. Welding head mounting plate; 040408, Laser welding unit; 040409, First lens mounting component; 040410, Second lens mounting component; 040411, Vision inspection unit; 040412, Light source mounting component; 040413, Ring light source; 040414, Translation limit bracket; 040415, Translation limit block; 040416, Off-axis air blowing micro-adjustment mechanism; 04041601, Adjustment base plate; 04041602, Adjustment plate; 040 41603. Adjusting the reinforcing ribs; 04041604. Adjusting the vertical transplanting mechanism; 04041605. Installing the upright plate on the alignment platform; 04041606. Installing the base plate on the alignment platform; 04041607. Installing the reinforcing ribs on the alignment platform; 04041608. XYθ alignment platform; 04041609. Installing the pitch platform mounting plate; 04041610. Pitch platform; 04041611. Installing the first air pipe; 04041612. Installing the second air pipe. Components: 04041613, Extremity protection air hose; 04041614, Protection air nozzle; 04041615, Adjustment mechanism cable chain fixed end mounting plate; 04041616, Adjustment mechanism cable chain moving end mounting plate; 0406, Welding horizontal transplanting mechanism cable chain fixed end mounting plate; 0407, Welding horizontal transplanting mechanism cable chain moving end mounting plate; 0408, Welding vertical transplanting mechanism cable chain fixed end mounting plate; 0409, Welding vertical transplanting mechanism cable chain moving end mounting plate.

[0048] 05. Exhaust components. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The present invention will now be described in further detail with reference to the accompanying drawings:

[0053] like Figure 1 As shown, a Dewar bottle ring welding device according to the present invention includes a frame 01, a control module, and a fixed rotating component 02, a product handling component 03, a laser welding component 04, and an exhaust component 05 disposed on the frame 01. The fixed rotating component 02, the product handling component 03, and the laser welding component 04 are all electrically connected to the control module. The fixed rotating component 02 is used to clamp and fix the Dewar bottle spot welding product; the product handling component 03 is used to pick up, place, and transport the Dewar bottle spot welding product and to introduce protective gas into the product; the laser welding component 04 is used to identify the weld seam, identify the oxidation condition of the weld point, and perform laser welding on the Dewar bottle spot welding product; and the exhaust component 05 is used to recover the fumes generated by laser welding.

[0054] Specifically:

[0055] like Figure 2-3As shown, in the above embodiment, preferably, the fixed rotating component 02 includes a servo rotating hollow platform 0201, a mounting base assembly, and a worktable 0205 connected in sequence. The servo rotating hollow platform 0201 is mounted on the frame 01 and can drive the mounting base assembly and the worktable 0205 to rotate. The worktable 0205 is used to carry the Dewar flask spot welding product. The mounting base assembly is provided with a first force-controlled gripper 0207 and two first irregularly shaped grippers 0206 slidably disposed on the top surface of 0205. The first force-controlled gripper 0207 is convexly connected to the first irregularly shaped grippers 0206 and can drive the first irregularly shaped grippers 0206 on both sides to move closer to or further away from the sliding to clamp or release the Dewar flask spot welding product. The servo rotating hollow platform 0201 and the first force-controlled gripper 0207 are both signal connected to the control module.

[0056] In the above embodiments, preferably, the mounting base assembly includes a mounting base plate 0202, a support base plate 0203, and a worktable base 0204 connected sequentially from top to bottom. The support base plate 0203 is provided with a gripper mounting plate 0211, and a first force-controlled gripper 0207 is assembled on the gripper mounting plate 0211. The worktable 0205 has cross roller slides 0210 and slide pads 0209 on both sides. A first irregularly shaped gripper finger 0206 is connected to the cross roller slide 0210, and the first force-controlled gripper 0207 is connected to the cross roller slide 0210 via a driving finger 0212 and a driving finger connecting plate 0213. In this embodiment, two slide pads 0209 are respectively fixedly mounted on the support base plate 0203 and located on both sides of the worktable 0205. Each slide pad 0209 has one cross roller slide 0210 fixed on it. Two first irregularly shaped gripper fingers 0206 are slidably mounted on opposite sides of the top of the worktable 0205, and each is connected to a cross roller slide 0210. When the cross roller slide 0210 slides, it drives the first irregularly shaped gripper fingers 0206 to move on the top of the worktable 0205. The ends of the two first irregularly shaped gripper fingers 0206 that are close together are V-shaped. When the two first irregularly shaped gripper fingers 0206 slide close together, they clamp the Dewar flask spot-welded product located on the worktable 0205. A gripper mounting plate 0211 is fixedly connected to a support base plate 0203, and a first force-controlled gripper 0207 is connected to the gripper mounting plate 0211. Two drive finger connecting plates 0213 are connected to the first force-controlled gripper 0207. Under the action of the first force-controlled gripper 0207, the two drive finger connecting plates 0213 can slide closer to and further away. Each drive finger connecting plate 0213 is connected to a drive finger 0212, and each drive finger 0212 is connected to a cross roller slide 0210. When the first force control gripper 0207 controls the drive finger connecting plate 0213 to move closer to or away from the slide, the cross roller slide 0210 drives the first irregular gripper finger 0206 to move closer to or away from the slide.

[0057] In the above embodiments, preferably, the fixed rotating component 02 further includes a first adjusting component 0214, which is disposed on both sides of the first irregularly shaped gripper finger 0206 corresponding to the cross roller slide 0210, so as to realize the centering adjustment of the first irregularly shaped gripper finger 0206 relative to the cross roller slide 0210. In this embodiment, the first adjusting component 0214 includes bolts.

[0058] In the above embodiments, preferably, the fixed rotating component 02 further includes a protective cover 0208, which covers the first force-controlled gripper 0207 and the first irregular gripper finger 0206.

[0059] like Figure 4-5 As shown, in the above embodiment, preferably, the product handling component 03 includes a first horizontal module mounting component 0301, a horizontal transfer mechanism 0302, a vertical transfer mechanism 0303, a gripper mechanism 0304, a drag chain fixed end mounting plate 0305 for the horizontal transfer mechanism, a drag chain moving end mounting plate 0306 for the horizontal transfer mechanism, a drag chain fixed end mounting plate 0307 for the vertical transfer mechanism, and a drag chain moving end mounting plate 0308 for the vertical transfer mechanism. The horizontal transfer mechanism 0302 is mounted on the frame 01 via the first horizontal module mounting component 0301; the vertical transfer mechanism 0303 is connected to the horizontal transfer mechanism 0302 and can be driven to move horizontally; the gripper mechanism 0304 is connected to the vertical transfer mechanism 0303 and can be driven to move vertically. The fixed end mounting plate 0305 of the horizontal transplanting mechanism cable chain is fixed to the first horizontal module mounting component 0301, and the moving end mounting plate 0306 of the horizontal transplanting mechanism cable chain is fixed to the vertical transplanting mechanism 0303. The fixed end of the horizontal transplanting mechanism cable chain is connected to the fixed end mounting plate 0305, and the moving end is connected to the moving end mounting plate 0306, thus providing moving support for the relevant cables and pipes during horizontal movement. The fixed end mounting plate 0307 of the vertical transplanting mechanism cable chain is fixed to the vertical transplanting mechanism 0303, and the moving end mounting plate 0308 of the vertical transplanting mechanism cable chain is fixed to the gripper mechanism 0304. The fixed end of the vertical transport mechanism cable chain is connected to the fixed end mounting plate 0307, ​​and the moving end of the vertical transport mechanism cable chain is connected to the moving end mounting plate 0308. This provides the vertical cable chain with support for the movement of related cables and pipes during vertical movement.

[0060] In the above embodiment, preferably, the gripper mechanism 0304 includes a gripper mounting base plate 030401, a gripper mounting plate 030402, a second force-controlled gripper 030403, a gripper pad 030404, a second irregularly shaped gripper finger 030405, a protective air pipe mounting block 030406, and a protective air pipe 030407. The gripper mounting base plate 030401 is connected to the vertical transfer mechanism 0303; the second force-controlled gripper 030403 is mounted on the gripper mounting plate 030402, and its... The gripper pad 030404 is connected to the second irregular gripper finger 030405; the gripper mounting plate 030402 is provided with a protective gas pipe mounting block 030406, and the protective gas pipe 030407 is matched with the protective gas pipe mounting block 030406; in this embodiment, the second force-controlled gripper 030403 is signal-connected to the control module to drive the second irregular gripper finger 030405 to clamp or release the Dewar bottle spot welding product, and the protective gas pipe 030407 is used to introduce protective gas into the Dewar bottle spot welding product.

[0061] In the above embodiments, preferably, the product handling component 03 further includes a second adjustment component 0309, wherein the second adjustment component 0309 includes bolts, and a plurality of bolts are distributed and installed around the first horizontal module mounting component 0301 for adjusting the levelness of the product handling component 03.

[0062] like Figure 6-7As shown, in the above embodiment, preferably, the laser welding component 04 includes a second horizontal module mounting component 0401, a welding horizontal transfer mechanism 0402, a welding vertical transfer mechanism 0403, a welding head translation mechanism 0404, a welding horizontal transfer mechanism drag chain fixed end mounting plate 0406, a welding horizontal transfer mechanism drag chain moving end mounting plate 0407, a welding vertical transfer mechanism drag chain fixed end mounting plate 0408, and a welding vertical transfer mechanism drag chain moving end mounting plate 0409; wherein, the welding horizontal transfer mechanism 0402 is mounted on the frame 01 via the second horizontal module mounting component 0401; the welding vertical transfer mechanism 0403 is connected to the welding horizontal transfer mechanism 0402 and can be driven by it to move horizontally, and the welding head translation mechanism 0404 is connected to the welding vertical transfer mechanism 0403 and can be driven by it to move vertically. The welding horizontal transfer mechanism cable chain fixed end mounting plate 0406 is fixed to the second horizontal module mounting part 0401, and the welding horizontal transfer mechanism cable chain moving end mounting plate 0407 is fixed to the welding vertical transfer mechanism 0403. The fixed end of the welding horizontal transfer mechanism cable chain is connected to the welding horizontal transfer mechanism cable chain fixed end mounting plate 0406, and the moving end of the welding horizontal transfer mechanism cable chain is connected to the welding horizontal transfer mechanism cable chain moving end mounting plate 0407. Thus, the horizontal cable chain provides moving support for the relevant cables and pipelines when moving horizontally; the welding vertical transfer mechanism cable chain fixed end mounting plate 0408 is fixed to the welding vertical transfer mechanism 0403, and the welding vertical transfer mechanism cable chain moving end mounting plate 0409 is fixed to the welding head translation mechanism 0404. The fixed end of the welding vertical transfer mechanism cable chain is connected to the mounting plate 0408 of the fixed end of the welding vertical transfer mechanism cable chain, and the moving end of the welding vertical transfer mechanism cable chain is connected to the mounting plate 0409 of the moving end of the welding vertical transfer mechanism cable chain. Thus, the vertical cable chain provides moving support for the relevant cables and pipelines during vertical movement.

[0063] like Figure 8-10 As shown, in the above embodiment, preferably, the welding head translation mechanism 0404 integrates a laser welding unit 040408, a vision inspection unit 040411, a translation unit, and a side-axis air blowing micro-adjustment mechanism 040416. The vision inspection unit and the laser welding unit are both signal-connected to the control module. The vision inspection unit 040411 is used to identify the weld position and the oxidation status of the weld point. The laser welding unit 040408 is used to perform spot welding and ring welding operations. The translation unit is used to drive the laser welding unit 040408, the vision inspection unit 040411, and the side-axis air blowing micro-adjustment mechanism 040416 to synchronously adjust the horizontal feed. The side-axis air blowing micro-adjustment mechanism 040416 is used to blow protective gas to the weld point in multiple directions.

[0064] In the above embodiments, preferably, the translation unit includes a translation mounting frame, a linear guide rail 040405, a low-speed cylinder 040404, and a welding head mounting plate assembly; the translation mounting frame is connected to the welding vertical transfer mechanism, the linear guide rail and the low-speed cylinder are assembled on the translation mounting frame, and the welding head mounting plate assembly is slidably connected to the linear guide rail; the laser welding unit 040408, the vision inspection unit 040411, the ring light source 040413, and the off-axis air blowing micro-adjustment mechanism 040416 are all assembled on the welding head mounting plate assembly, and the low-speed cylinder can drive the welding head mounting plate assembly to translate along the linear guide rail.

[0065] In the above embodiment, preferably, the translational installation frame includes a translational installation upright plate 040401, a translational installation base plate 040402, and a translational installation reinforcing rib 040403, which together form a stable frame structure. The translational installation upright plate 040401 is vertically connected to the welded vertical transplanting mechanism 0403, the translational installation base plate 040402 is horizontally fixed to the translational installation upright plate 040401, and the translational installation reinforcing rib 040403 is connected between the translational installation upright plate 040401 and the translational installation base plate 040402 to enhance structural strength; a low-speed cylinder 040404, a linear guide rail 040405, and a translational limiting bracket 040414 are mounted on the translational installation base plate 040402. The welding head mounting base plate 040406 is slidably connected to the linear guide rail 040405 and is driven by the low-speed cylinder 040404. The welding head mounting base plate 040406 is provided with a translation limit block 040415, which cooperates with the translation limit bracket 040414 to limit the translation stroke. At the same time, the welding head mounting base plate 040406 is also equipped with core functional components such as the laser welding unit 040408, the vision inspection unit 040411, and the off-axis air blowing micro-adjustment mechanism 040416.

[0066] In the above embodiments, preferably, the welding head mounting plate assembly consists of a welding head mounting base plate 040406 and a welding head mounting upright plate 040407, which serves as an integrated carrier for the core functional components of laser welding. The welding head mounting base plate 040406 is slidably connected to the linear guide rail 040405 of the translation unit and is also connected to the low-speed cylinder 040404, allowing it to move horizontally along the linear guide rail under the drive of the low-speed cylinder 040404. The welding head mounting upright plate 040407 is vertically fixed to the welding head mounting base plate 040406, and is equipped with a laser welding unit 040408 and a first lens mounting component 040409. The first lens mounting component 040409 is connected to a second lens mounting component 040410, and a vision inspection unit 04 is installed between them. 0411; The welding head mounting base plate 040406 is also equipped with a light source mounting component 040412 and a translation limit block 040415. The light source mounting component 040412 is used to fix the ring light source 040413. The translation limit block 040415 cooperates with the translation limit bracket 040414 on the translation mounting frame to limit the movement stroke. At the same time, the welding head mounting base plate 040406 is also fixedly connected to the adjustment base plate 04041601 of the off-axis air blowing micro-adjustment mechanism 040416 to realize the synchronous linkage between the core welding component and the shielding gas adjustment mechanism.

[0067] like Figure 7 As shown, in the above embodiment, preferably, the off-axis air blowing micro-adjustment mechanism 040416 includes an adjustment frame, an adjustment vertical transfer mechanism 04041604, an XYθ alignment platform 04041608, a pitch platform 04041610, an off-axis protective gas assembly, and an adjustment mechanism drag chain assembly; wherein, the adjustment frame is connected to the welding head mounting plate assembly, the adjustment vertical transfer mechanism 04041604 is assembled on the adjustment frame and can drive the XYθ alignment platform 04041608 to translate along the Z-axis; the XYθ alignment platform 04041608 can drive the pitch platform to translate along the X-axis and Y-axis and rotate around the θ-axis, the off-axis protective gas assembly is connected to the pitch platform 04041610 through an air pipe mounting component; the off-axis protective gas assembly includes an off-axis protective gas pipe 04041613 and a protective gas nozzle 04041614 connected in sequence, which can accurately blow protective gas to the welding point from multiple directions. The adjustment mechanism cable chain assembly includes an adjustment mechanism cable chain fixed end mounting plate 04041615 and an adjustment mechanism cable chain moving end mounting plate 04041616. The adjustment mechanism cable chain fixed end mounting plate 04041615 is fixed on the adjustment upright plate 04041602, and the adjustment mechanism cable chain moving end mounting plate 04041616 is fixed on the alignment platform mounting upright plate 04041605. The fixed end of the adjustment mechanism cable chain is connected to the adjustment mechanism cable chain fixed end mounting plate 04041615, and the moving end of the adjustment mechanism cable chain is connected to the adjustment mechanism cable chain moving end mounting plate 04041616, thereby providing moving support for the cables and pipelines of the off-shaft air blowing micro-adjustment mechanism 040416.

[0068] In the above embodiment, preferably, the adjustment frame includes an adjustment base plate 04041601, an adjustment upright plate 04041602, and an adjustment reinforcing rib 04041603, providing an installation foundation for the off-axis air-blowing micro-adjustment mechanism. The adjustment base plate 04041601 is horizontally fixed to the welding head mounting base plate 040406, the adjustment upright plate 04041602 is vertically connected to the adjustment base plate 04041601, and the adjustment reinforcing rib 04041603 is connected between the two to improve structural stability. An adjustment vertical transfer mechanism 04041604 is mounted on the adjustment upright plate 04041602. The alignment platform mounting upright plate 04041605 is connected to the adjustment vertical transfer mechanism 04041604 and can be driven by it to translate along the Z-axis. The alignment platform mounting base plate 04041606 is fixed to the alignment platform mounting upright plate 04041602. On 4041605, and between the two, there is a positioning platform mounting reinforcing rib 04041607; on the positioning platform mounting base plate 04041606, the XYθ positioning platform 04041608, the pitch platform mounting plate 04041609 and the pitch platform 04041610 are connected in sequence. The pitch platform 04041610 is connected to the off-axis protection air pipe 04041613 through the first air pipe mounting component 04041611 and the second air pipe mounting component 04041612. The end of the off-axis protection air pipe 04041613 is equipped with a protection air nozzle 04041614.

[0069] In the above embodiment, preferably, the laser welding component 04 further includes a third adjustment component 0405, wherein the third adjustment component 0405 includes bolts, and a plurality of bolts are distributed and installed around the second horizontal module mounting component 0401 for adjusting the levelness of the product handling component 03.

[0070] In the above embodiment, preferably, the exhaust component 05 is installed and connected to the frame 01. During laser welding, the exhaust component 05 can recover the fumes generated during laser welding and purify the factory environment.

[0071] According to the present invention, a Dewar ring welding method is applied to the aforementioned Dewar ring welding apparatus, comprising:

[0072] The second force-controlled gripper 030403 of the product handling component 03 drives the second irregularly shaped gripper 030405 to grab the Dewar bottle spot welding product, and transfers it to the worktable 0205 of the fixed rotating component 02 via the horizontal transfer mechanism 0302 and the vertical transfer mechanism 0303. The first force-controlled gripper 0207 of the fixed rotating component 02 drives the first irregularly shaped gripper 0206 to slide close and clamp the Dewar bottle spot welding product.

[0073] Adjust the position of the product handling component 03 so that the protective gas pipe 030407 is aligned with the inside of the Dewar bottle spot welded product and protective gas is introduced, and the preset time is maintained to expel the internal air.

[0074] The vision inspection unit 040411 of the laser welding component 04 identifies the weld position and sends it to the control module. The control module drives the fixed rotating component 02 to adjust the weld position, and at the same time controls the translation unit to drive the laser welding unit 040408, the vision inspection unit 040411 and the off-axis air blowing micro-adjustment mechanism 040416 to feed synchronously. The off-axis air blowing micro-adjustment mechanism 040416 adjusts the position of the protective gas nozzle 04041614 through the XYθ alignment platform 04041608 and the pitch platform 04041610, and performs spot welding after aligning the laser welding unit 040408 with the weld.

[0075] The visual inspection unit 040411 identifies the oxidation of the spot weld and feeds it back to the control module. After the control module confirms that there is no abnormality, it completes the ring welding in conjunction with the rotation of the fixed rotating component 02.

[0076] After the ring welding is completed, the fixed rotating part 02 releases the product, and the product handling part 03 grabs the ring-welded product and moves it away from the workbench 0205, completing the unloading.

[0077] In the above embodiments, preferably, during the welding process, the exhaust component 05 continuously recovers the welding fumes.

[0078] Advantages of this invention:

[0079] This invention integrates a fixed rotating component 02, a product handling component 03, a laser welding component 04, an exhaust component 05, and a control module to construct a fully automated Dewar bottle ring welding system. This system completely replaces manual clamping, position adjustment, and welding operations, requiring no manual intervention throughout the process. It significantly reduces labor costs and efficiently meets the large-scale production needs under the background of military-civilian integration.

[0080] This invention utilizes the weld seam recognition and weld point oxidation recognition functions of the laser welding component 04, combined with the precise control of the control module, to avoid subjective errors caused by manual operation and ensure consistent welding quality. At the same time, the product handling component 03 can introduce protective gas into the product, and the exhaust component 05 can recover welding fumes, which reduces weld point oxidation and purifies the production environment, providing key assurance for the detection accuracy of the cooled infrared detector.

[0081] This invention achieves automated and coordinated operation of various processes through signal connection between each component and the control module, eliminating the need for manual intervention and significantly improving production efficiency. Furthermore, each core component has a clearly defined function and works closely together, simplifying the operation process while ensuring welding accuracy and product quality, and further adapting to the high-efficiency production needs of Dewar flasks under the background of military-civilian integration.

[0082] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. For those skilled in the art, the present invention can be modified and varied in various ways. For example, the welding process in the present invention, which uses a local protective gas blowing mode, can be extended to a welding mode under a glove box atmosphere. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for welding a grommet to a dewar, the device comprising: The device comprises a rack, a control module, and fixed rotating components, product carrying components, laser welding components and exhaust components arranged on the rack, and the fixed rotating components, product carrying components and laser welding components are electrically connected with the control module; The fixed rotating components are used for clamping the dewar bottle spot welding products; The product carrying components are used for taking, carrying the dewar bottle spot welding products and introducing protective gas into the products; The laser welding components are used for weld seam identification, spot oxidation identification and laser welding of the dewar bottle spot welding products; The exhaust components are used for recycling the smoke generated by laser welding.

2. The dewar ring welding apparatus of claim 1, wherein, The fixed rotating components comprise a servo rotating hollow platform, a mounting base assembly and a workbench connected in sequence, the servo rotating hollow platform is assembled on the rack and can drive the mounting base assembly and the workbench to rotate, and the workbench is used for carrying the dewar bottle spot welding products; the mounting base assembly is provided with a first force control clamp and two first special-shaped clamping fingers slidingly arranged on the top surface of the workbench, the first force control clamp is in transmission connection with the first special-shaped clamping fingers and can drive the two first special-shaped clamping fingers to slide close to or away from each other to clamp or release the dewar bottle spot welding products; and the servo rotating hollow platform and the first force control clamp are in signal connection with the control module.

3. The dewar ring welding apparatus of claim 2, wherein, The mounting base assembly comprises a mounting bottom plate, a supporting bottom plate and a workbench base connected in sequence from top to bottom, the supporting bottom plate is provided with a clamp mounting vertical plate, and the first force control clamp is assembled on the clamp mounting vertical plate; the two sides of the workbench are provided with a cross roller sliding table and a sliding table backing plate, the first special-shaped clamping fingers are connected with the cross roller sliding table, and the first force control clamp is in transmission connection with the cross roller sliding table through a driving finger and a driving finger connecting plate.

4. The dewar ring welding apparatus of claim 1, wherein, The product carrying components comprise a first horizontal module installation, a carrying horizontal transplanting mechanism, a carrying vertical transplanting mechanism and a clamp mechanism; the carrying horizontal transplanting mechanism is installed on the rack through the first horizontal module installation; the carrying vertical transplanting mechanism is connected with the carrying horizontal transplanting mechanism and can be driven to move horizontally by the carrying horizontal transplanting mechanism, and the clamp mechanism is connected with the carrying vertical transplanting mechanism and can be driven to move vertically by the carrying vertical transplanting mechanism; The clamp mechanism comprises a second force control clamp, a second special-shaped clamping finger and a protective gas pipe, the second force control clamp is in signal connection with the control module to drive the second special-shaped clamping finger to clamp or release the dewar bottle spot welding products, and the protective gas pipe is used for introducing protective gas into the dewar bottle spot welding products.

5. The dewar ring welding apparatus of claim 4, wherein, The clamp mechanism further comprises a clamp mounting bottom plate and a clamp mounting plate connected in sequence, the clamp mounting bottom plate is connected with the carrying vertical transplanting mechanism; the second force control clamp is assembled on the clamp mounting plate and connected with the second special-shaped clamping finger through a clamp backing block; and the clamp mounting plate is provided with a protective gas pipe mounting block, and the protective gas pipe is assembled on the protective gas pipe mounting block.

6. The dewar ring welding apparatus of claim 1, wherein, The laser welding component comprises a second horizontal mold assembly mounting member, a welding horizontal transplanting mechanism, a welding vertical transplanting mechanism and a welding head translation mechanism; the welding horizontal transplanting mechanism is mounted on the rack through the second horizontal mold assembly mounting member; the welding vertical transplanting mechanism is connected to the welding horizontal transplanting mechanism and can be driven to move horizontally by the welding horizontal transplanting mechanism; and the welding head translation mechanism is connected to the welding vertical transplanting mechanism and can be driven to move vertically by the welding vertical transplanting mechanism. The welding head translation mechanism integrates a laser welding unit, a visual detection unit, a translation unit and a side-shaft blowing micro-adjusting mechanism; the visual detection unit and the laser welding unit are signal-connected with the control module; the visual detection unit is used for identifying the weld position and the oxidation condition of the welding spot; the laser welding unit is used for performing spot welding and circle welding work; the translation unit is used for driving the laser welding unit, the visual detection unit and the side-shaft blowing micro-adjusting mechanism to be synchronously adjusted in horizontal feeding; and the side-shaft blowing micro-adjusting mechanism is used for blowing protective gas to the welding spot in multiple directions.

7. The dewar ring welding apparatus of claim 6, wherein, The translation unit comprises a translation mounting frame body, a linear guide rail, a low-speed cylinder and a welding head mounting plate assembly. The translation mounting frame body is connected with the welding vertical transplanting mechanism; the linear guide rail and the low-speed cylinder are assembled in the translation mounting frame body; and the welding head mounting plate assembly is slidingly connected with the linear guide rail; the laser welding unit, the visual detection unit, a ring-shaped light source and the side-shaft blowing micro-adjusting mechanism are all assembled in the welding head mounting plate assembly; and the low-speed cylinder can drive the welding head mounting plate assembly to translate along the linear guide rail.

8. The dewar ring welding apparatus of claim 6, wherein, The side-shaft blowing micro-adjusting mechanism comprises an adjusting frame body, an adjusting vertical transplanting mechanism, an XYθ alignment platform, a pitch platform and a side-shaft protective gas assembly. The adjusting frame body is connected with the welding head mounting plate assembly; the adjusting vertical transplanting mechanism is assembled in the adjusting frame body and can drive the XYθ alignment platform to translate along the Z axis; the XYθ alignment platform can drive the pitch platform to translate along the X axis and the Y axis and rotate around the θ axis; the side-shaft protective gas assembly is connected with the pitch platform through a gas pipe mounting member; and the side-shaft protective gas assembly comprises a side-shaft protective gas pipe and a protective gas nozzle which are connected in sequence and can accurately blow protective gas to the welding spot in multiple directions.

9. A method of welding a grommet to a dewar, using the apparatus of any one of claims 1 to 8, wherein, The product carrying component drives the second special-shaped clamping finger to grab the dewar flask spot-welded product by the second force-controlled clamping jaw, transfers the dewar flask spot-welded product to the workbench of the fixed rotating component through the carrying horizontal transplanting mechanism and the carrying vertical transplanting mechanism, and drives the first special-shaped clamping finger to approach and clamp the dewar flask spot-welded product by the first force-controlled clamping jaw of the fixed rotating component; The product carrying component adjusts the position so that the protective gas pipe is aligned with the inside of the dewar flask spot-welded product and the protective gas is introduced into the dewar flask spot-welded product, and the inside of the dewar flask spot-welded product is kept for a preset time to discharge the internal air; The visual detection unit of the laser welding component identifies the weld position and sends it to the control module; the control module drives the fixed rotating component to adjust the weld position, controls the translation unit, drives the laser welding unit, the visual detection unit and the side-shaft blowing micro-adjusting mechanism to be synchronously fed, and drives the laser welding unit to perform spot welding after the laser welding unit is aligned with the weld by adjusting the position of the protective gas nozzle through the XYθ alignment platform and the pitch platform of the side-shaft blowing micro-adjusting mechanism. ​ The visual detection unit identifies the oxidation of the spot welding spot and feeds back to the control module. The control module confirms that there is no abnormality, and cooperates with the rotation of the fixed rotating part to complete the ring welding. After the ring welding is completed, the fixed rotating part loosens the product, the product carrying part grabs the product after the ring welding and carries it away from the workbench, completing the discharging.

10. The method of claim 9, wherein, During the welding process, the exhaust part continuously recovers the smoke generated by welding.

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