A drilling and welding integrated device for copper water box production and a preparation method thereof

Abstract

The application provides a drilling and welding integrated device for copper water box production and a preparation method, and relates to the technical field of copper water box production. The device solves the problems of traditional processes, such as easy preheating leading to coarse copper grains, affecting performance, too high copper block temperature, difficulty in positioning the stainless steel support plate and difficulty in subsequent process operation. The device comprises a bottom plate, a U-shaped workbench, a three-axis drilling assembly, a pair of welding assemblies and a clamping assembly. The clamping assembly comprises a support frame, a first driving mechanism, a second driving mechanism, a pair of first clamping blocks and a pair of second clamping blocks. The support frame is arranged on the top surface of the opposite opening of the U-shaped workbench. The first driving mechanism is installed on the support frame and drives the first clamping blocks to move along the width direction of the opening and rotate around the moving track. The second driving mechanism is installed on the first driving mechanism and drives the second clamping blocks to move along the width direction and the depth direction of the opening. The device is mainly used for copper water box production.

Description

Technical Field

[0001] This invention relates to the field of copper water box manufacturing technology, and in particular to an integrated drilling and welding device and preparation method for copper water box manufacturing. Background Technology

[0002] The copper water tank in a steam turbine generator is a key component of the unit, mainly used in the cooling system. Due to the need for good electrical and thermal conductivity, it is usually made of copper. It must ensure airtightness during operation to prevent water or air leaks, therefore requiring extremely high manufacturing quality.

[0003] In the production of copper water boxes, the traditional process involves first welding a solid copper block to a stainless steel support plate, and then drilling and machining the copper block into the shape of a copper box. This is to prevent the copper box from deforming due to the high temperature of the welding process. However, this method has a drawback: the solid copper needs to be preheated for a long time, and excessive preheating time can easily lead to coarse copper grains, affecting its performance. Overheating of the copper also makes it difficult for operators to approach, causing many inconveniences and safety hazards when fixing the stainless steel support plate. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an integrated drilling and welding device and manufacturing method for copper water box production. It comprises two sets of clamps, an outer clamp for fixing a copper block for drilling and shaping into a copper box, and an inner clamp for supporting the copper box from the inside. During the welding process between the copper box and stainless steel, the internal support effectively resists welding heat deformation, thus realizing a "drill first, then weld" process. This solves the problems of traditional processes, where preheating easily leads to coarse copper grains, affecting performance, and excessively high copper block temperature, making it difficult to position the stainless steel support plate and hindering subsequent processes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an integrated drilling and welding device for the production of copper water boxes, comprising a base plate, a U-shaped worktable, a three-axis drilling assembly, a pair of welding assemblies, and a clamping assembly; The U-shaped worktable and the triaxial drilling assembly are both mounted on the base plate; The triaxial drilling assembly is located inside the opening of the U-shaped worktable; The pair of welding components are symmetrically arranged on the top surface of the U-shaped workbench on both sides of the opening; The clamping assembly includes a support frame, a first drive mechanism, a second drive mechanism, and a pair of first clamping blocks and a pair of second clamping blocks located above the opening. The pair of first clamping blocks are sleeved on the outside of the pair of second clamping blocks. The support frame is disposed on the top surface of the U-shaped worktable opposite the opening. The first drive mechanism is mounted on the support frame and drives the first clamping blocks to move along the width direction of the opening and rotate about the movement trajectory as an axis. The second drive mechanism is mounted on the first drive mechanism and drives the second clamping blocks to move along the width direction and the depth direction of the opening.

[0006] Furthermore, the support frame includes a pair of U-shaped frames, and preheating components and stainless steel clamping components corresponding to each U-shaped frame. The U-shaped frames are vertically connected to the top surfaces of the openings opposite to the U-shaped worktable. The opening ends of the U-shaped frames are located above the openings. The preheating components and stainless steel clamping components are respectively installed at the top and bottom of the opening ends of the U-shaped frames.

[0007] Furthermore, the preheating assembly includes a first telescopic rod and an induction heating block connected together, as well as an infrared temperature probe. The first telescopic rod is installed at the top of the opening end of the U-shaped frame to drive the induction heating block to move up and down. The infrared temperature probe is installed at the top of the opening end of the U-shaped frame to detect the temperature of the copper box. The stainless steel clamping assembly includes a second telescopic rod and a stainless steel clamping groove connected together. The second telescopic rod is installed at the bottom of the opening end of the U-shaped frame to drive the stainless steel clamping groove to move up and down.

[0008] Furthermore, the first driving mechanism includes a first mounting plate, a first transverse driving unit, and a transverse plate, a support arm, a connecting plate, and a rotation driving unit corresponding to the first clamping block. The first mounting plate is connected to the support frame, the transverse driving unit is mounted on the first mounting plate and drives the transverse plate to move along the width direction of the opening, one end of the support arm is connected to the transverse plate and the other end is connected to the connecting plate, the first clamping block is rotatably connected to the side of the connecting plate near the opening, and the rotation driving unit is mounted on the connecting plate and drives the first clamping block to rotate around the moving trajectory as an axis.

[0009] Furthermore, the first transverse drive unit includes a first bidirectional lead screw and a first motor connected together. The first bidirectional lead screw is rotatably connected to a first mounting plate, and the first motor is mounted on the first mounting plate. The transverse plate is threadedly connected to the first bidirectional lead screw. The rotary drive unit includes an adjusting worm gear, an adjusting worm, and a rotary drive motor. The adjusting worm gear is axially connected to a first clamping block and radially meshes with the adjusting worm. The rotary drive motor is mounted on a connecting plate and drives the adjusting worm to rotate.

[0010] Furthermore, the second drive mechanism includes a third telescopic rod, a second mounting plate, a second lateral drive unit, and a pair of mounting arms. The third telescopic rod is mounted on the first mounting plate and drives the second mounting plate to move along the depth direction of the opening. The second lateral drive unit is mounted on the second mounting plate and drives the mounting arms to move along the width direction of the opening. The second clamping block corresponds to the mounting arm one by one and is connected to the side of the mounting arm away from the opening.

[0011] Furthermore, the second transverse drive unit includes a second bidirectional lead screw and a second motor connected to each other. The second bidirectional lead screw is rotatably connected to a second mounting plate, the second motor is mounted on the second mounting plate, and the mounting arm is threadedly connected to the second bidirectional lead screw.

[0012] Furthermore, both the first and second clamping blocks have silicone pads attached to their clamping surfaces, with a Shore hardness of 50-60 degrees. The clamping surfaces are arc-shaped to match the shape of the copper box.

[0013] Furthermore, the welding assembly includes a first linear module, a fixed frame, a third mounting plate, a second linear module, a fourth telescopic rod, a laser welding head, and a swing cylinder. The first linear module is mounted on the top surface of the U-shaped worktable and drives the fixed frame to move along the depth direction of the opening. The second linear module is mounted on the fixed frame and drives the third mounting plate to move up and down. The fourth telescopic rod is mounted on the side of the third mounting plate near the opening via a turntable and drives the laser welding head to move along the width direction of the opening. The swing cylinder is mounted on the side of the third mounting plate away from the opening and drives the fourth telescopic rod to rotate.

[0014] A method for manufacturing a copper water box, using the aforementioned integrated drilling and welding device for copper water box production, includes the following specific steps: S1. External clamping and workpiece flipping positioning: Control the second drive mechanism to move the second clamping block out from above the opening along the depth direction of the opening, control the first drive mechanism to drive the first clamping block to move along the width direction of the opening, clamp and fix the copper block material, and rotate the copper block material so that its drilling working surface faces the three-axis drilling assembly. S2, Drilling and Hollowing Forming Process: Control the three-axis drilling assembly to drill the copper block raw material and process it into a copper box; S3. Internal support positioning and internal / external clamping switching: Control the first drive mechanism to rotate the copper box, and control the second drive mechanism to move the second clamping block into the copper box to support and fix the copper box from the inside. S4. Preheating before welding: Control the first drive mechanism to drive the first clamping block away from the copper box, and then control the first telescopic rod to drive the induction heating block to move to the outside of the copper box to heat the copper box. The infrared temperature probe detects the temperature of the welding area in real time. When the temperature reaches the welding process requirements, drive the induction heating block to return to its original position. S5. Stainless steel sheet loading and welding surface clamping and positioning: Stainless steel sheet is assembled on stainless steel clamping groove. The second telescopic rod is controlled to move the stainless steel sheet to the outside of the copper box. Then the first drive mechanism is controlled to drive the first clamping block to clamp and fix the stainless steel sheet to the copper box. After that, the stainless steel clamping groove is driven to return to its original position. S6. Welding and forming: Control the welding components to weld and fix the stainless steel plate to the copper box.

[0015] Compared with the prior art, the beneficial effects of the integrated drilling and welding device and manufacturing method for copper water box production described in this invention are: 1. In terms of the manufacturing process, this invention features a clamping assembly with coordinated internal and external clamping. During the drilling stage, the outer first clamping block, driven by the first driving mechanism, clamps the solid copper block from the outside, ensuring the positioning rigidity of the three-axis drilling assembly during processing. After drilling and hollowing out the copper box, the copper box is rotated so that the drilled hollow cavity faces the second clamping block. The second driving mechanism sends the second clamping block into the hollow cavity of the copper box, driving the second clamping block to expand outward, supporting and fixing the thin-walled copper box from the inside. Subsequently, the outer first clamping block is released, completing a seamless switch from "outside to inside," ensuring that the copper box wall receives uniform internal support force during welding. Then, the copper box is preheated. This invention achieves a "drill first, then weld" process transformation, completely avoiding the cumbersome process and performance loss of traditional processes where preheating of solid copper leads to grain coarsening and the need for drilling.

[0016] 2. Regarding workpiece support, the present invention integrates a "second bidirectional lead screw + second clamping block" on one side of the workpiece to achieve the internal support function of the copper box. The structure is compact and occupies little external space. The second clamping block supports the copper box from the inside, and the outside of the box can be completely exposed, which facilitates subsequent preheating and welding operations. The internal support method does not require the external space of the copper box and avoids interfering with other processes.

[0017] 3. Regarding preheating control, this invention employs a closed-loop regulation system combining induction heating and infrared temperature measurement. The first telescopic rod drives the induction heating block to rapidly heat the welding area locally. An infrared temperature probe collects the temperature in real time and adjusts the heating power of the induction heating block accordingly. Compared to traditional methods involving prolonged overall heating, this solution shortens the preheating time, concentrates the heating area, prevents copper grain growth, significantly reduces the ambient temperature, eliminates the risk of burns, ensures uniform temperature at the welding interface, improves welding quality, and makes subsequent stainless steel plate loading and laser welding safer and more convenient.

[0018] 4. Regarding welding and forming, after preheating, this invention utilizes the first clamping block to clamp and fix the stainless steel plate to the copper box from the outside, and controls the welding assembly to weld and fix the stainless steel plate to the copper box. This invention, through the cooperation of the first and second clamping blocks, effectively resists shrinkage deformation caused by welding thermal stress, ensuring the accuracy of weld alignment and the sealing of the finished product.

[0019] 5. In terms of protecting the workpiece, the present invention attaches silicone pads with a hardness of Shore 50-60 on the clamping surfaces of both the first clamping block and the second clamping block. The clamping surfaces are arc-shaped to fit the shape of the copper box, preventing scratches on the workpiece during clamping. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the integrated drilling and welding device for producing copper water boxes according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the integrated drilling and welding device for producing copper water boxes according to the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the clamping assembly described in this invention; Figure 4 This is a schematic diagram of the support frame described in this invention; Figure 5 This is a schematic diagram of the structure of the first driving mechanism, the second driving mechanism, the first clamping block, and the second clamping block of the present invention; Figure 6 For the present invention Figure 5 A magnified view of a section at point A in the middle; Figure 7 For the present invention Figure 5 Top view; Figure 8 This is a schematic diagram of the structure of the welding assembly described in this invention. Figure 1 ; Figure 9 This is a schematic diagram of the structure of the welding assembly described in this invention. Figure 2 ; Figure 10 This is a schematic diagram of the structure of the copper water box described in this invention; Figure 11 This is a schematic diagram of the assembly structure of the copper water box and clamping assembly described in this invention. Figure 1 ; Figure 12 This is a schematic diagram of the assembly structure of the copper water box and clamping assembly described in this invention. Figure 2 ; In the diagram: 1-base plate; 2-U-shaped worktable; 3-three-axis drilling assembly; 4-welding assembly; 5-clamping assembly; 21-opening; 51-Support frame; 52-First drive mechanism; 53-Second drive mechanism; 54-First clamping block; 55-Second clamping block; 511-U-shaped frame; 512-First telescopic rod; 513-Induction heating block; 514-Infrared temperature probe; 515-Second telescopic rod; 516-Stainless steel clamping groove; 521-First mounting plate; 5211-First slide rail; 5212-Guide rod; 522-First bidirectional lead screw; 523-First motor; 524-Transverse plate; 525-Support arm; 526-Connecting plate; 527-Adjusting worm gear; 528-Adjusting worm; 529-Rotary drive motor; 5281-Bearing seat; 531 - Third telescopic rod; 532 - Second mounting plate; 5321 - Second slide rail; 533 - Second bidirectional lead screw; 534 - Second motor; 535 - Mounting arm; 41-First linear module; 42-Fixed frame; 421-Lifting slide rail; 43-Third mounting plate; 44-Second linear module; 45-Fourth telescopic rod; 46-Laser welding head; 47-Oscillating cylinder; P - Copper box; M - Stainless steel sheet. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0022] I. Detailed Implementation Method 1, see [link / reference] Figure 1-12 This embodiment describes an integrated drilling and welding device for producing copper water boxes, comprising a base plate 1, a U-shaped worktable 2, a three-axis drilling assembly 3, a pair of welding assemblies 4, and a clamping assembly 5. The U-shaped worktable 2 and the three-axis drilling assembly 3 are both mounted on the base plate 1. The base plate 1 is made of Q235 carbon steel and the surface is treated with anti-rust to ensure the overall stability of the device. The three-axis drilling assembly 3 uses a linear module drive, and the drill bit speed can be steplessly adjusted between 1000r / min and 3000r / min to meet the drilling requirements of copper blocks. The drill bit is made of carbide and its diameter is adapted to the hole diameter required for the production of copper water boxes. The triaxial drilling assembly 3 is located inside the opening 21 of the U-shaped worktable 2, and the area size of the opening 21 is adapted to the triaxial drilling device 3; The pair of welding components 4 are symmetrically arranged on the top surface of the U-shaped workbench 2 on both sides of the opening 21; See Figure 3 The clamping assembly 5 includes a support frame 51, a first driving mechanism 52, a second driving mechanism 53, and a pair of first clamping blocks 54 and a pair of second clamping blocks 55 located above the opening 21. The pair of first clamping blocks 54 and the pair of second clamping blocks 55 are arranged linearly along the width direction of the opening 21, and the pair of first clamping blocks 54 are sleeved on the outside of the pair of second clamping blocks 55. The support frame 51 is located on the top surface of the U-shaped worktable 2 opposite to the opening 21, that is, on the rear side of the middle part of the top surface of the U-shaped worktable 2. The first driving mechanism 52 is mounted on the support frame 51 and drives the first clamping blocks 54 to move along the width direction of the opening 21 and rotate about the moving trajectory as an axis. The second driving mechanism 53 is mounted on the first driving mechanism 52 and drives the second clamping blocks 55 to move along the width direction and the depth direction of the opening 21.

[0023] Preferred, see Figure 4 The support frame 51 includes a pair of U-shaped frames 511, and preheating components and stainless steel clamping components corresponding to each U-shaped frame 511. The U-shaped frames 511 are vertically connected to the top surface of the opening 21 of the U-shaped worktable 2, with the open end of the U-shaped frame 511 located above the opening 21. The preheating components and stainless steel clamping components are respectively installed at the top and bottom of the open end of the U-shaped frame 511. The U-shaped frames 511 are made of cast steel and are fixed to the U-shaped worktable 2 with high-strength bolts.

[0024] The preheating assembly includes a first telescopic rod 512 and an induction heating block 513 connected to each other, as well as an infrared temperature probe 514. The first telescopic rod 512 is installed on the top of the opening end of the U-shaped frame 511 to drive the induction heating block 513 to move up and down. The infrared temperature probe 514 is installed on the top of the opening end of the U-shaped frame 511 to detect the temperature of the copper box P in real time and avoid damage to the workpiece due to excessive temperature. The first telescopic rod 512 is a double-acting cylinder with a stroke adapted to the specifications of the induction heating block 513, which can precisely push the induction heating block 513 down to preheat the welding area of ​​the copper box P. The induction heating block 513 adopts electromagnetic induction heating, with a heating power of 15kW-40kW and a heating temperature that can be adjusted between 100℃-400℃. The heating surface conforms to the shape of the copper box P, and the preheating is uniform, which can reduce welding stress and prevent weld cracking. The infrared temperature measuring probe 514 has a measurement range of 0-500℃ and a measurement accuracy of ±2℃.

[0025] The stainless steel clamping assembly includes a second telescopic rod 515 and a stainless steel clamping groove 516 connected to each other. The second telescopic rod 515 is installed at the bottom of the opening end of the U-shaped frame 511 and drives the stainless steel clamping groove 516 to move up and down. The stainless steel clamping groove 516 is made of 304 stainless steel and is used to install stainless steel plate M. The groove size of the stainless steel clamping groove 516 is adapted to the stainless steel sheet, and the groove wall is smooth to avoid scratching the workpiece.

[0026] Preferred, see Figure 5 and Figure 6 The first driving mechanism 52 includes a first mounting plate 521, a first transverse drive unit, and transverse plates 524, support arms 525, connecting plates 526, and rotary drive units corresponding to the first clamping blocks 54. The first mounting plate 521 is welded and fixed to the middle of a pair of U-shaped frames 511 inside the support frame 51. The weld is inspected for flaws and no cracks are found. The transverse drive unit is mounted on the first mounting plate 521 and drives the transverse plate 524 to move along the width direction of the opening 21. One end of the support arm 525 is connected to the transverse plate 524, and the other end is connected to the connecting plate 526. The first clamping block 54 is rotatably connected to the side of the connecting plate 526 near the opening 21. The rotary drive unit is mounted on the connecting plate 526 and drives the first clamping block 54 to rotate around the moving trajectory. The transverse plate 524, support arm 525, and connecting plate 526 are all made of stainless steel. The first transverse drive unit includes a first bidirectional lead screw 522 and a first motor 523 connected to each other. The first mounting plate 521 is provided with a first slide rail 5211 on the side near the opening 21. The first bidirectional lead screw 522 is rotatably connected to the first mounting plate 521 and parallel to the first slide rail 5211. The first motor 523 is mounted on the first mounting plate 521. The pair of transverse plates 524 are slidably connected to the first slide rail 5211 and respectively engage with the bidirectional threads on the first bidirectional lead screw 522.

[0027] The first slide rail 5211 is a linear slide rail, and the pair of transverse sliding plates 524 are clearance-fitted with the first slide rail 5211 to ensure smooth sliding. The first bidirectional lead screw 522 is made of 45# steel, with a surface hardened and a thread precision of grade 7, enabling synchronous reverse movement of the pair of transverse sliding plates 524; the transverse sliding plates 524 and the first bidirectional lead screw 522 are tightly threaded together without loosening; the first motor 523 has a power of 0.75kW-1.1kW, and its speed can be adjusted between 0-1500r / min. It is connected to the first bidirectional lead screw 522 through a coupling, ensuring smooth transmission.

[0028] The rotary drive unit includes an adjusting worm gear 527, an adjusting worm 528, and a rotary drive motor 529. A bearing seat 5281 is welded and fixed to the side of the connecting plate 526 away from the opening 21. The adjusting worm 528 is installed in the bearing seat 5281. The adjusting worm gear 527 is axially connected to the end of the first clamping block 54 away from the opening 21 and radially meshes with the adjusting worm 528. The rotary drive motor 529 is installed on the connecting plate 526 and drives the adjusting worm 528 to rotate.

[0029] The bearing housing 5281 is made of stainless steel, and the adjusting worm 528 is made of 45 steel with a surface hardened to a hardness of HRC40 or higher. The meshing accuracy between the adjusting worm wheel 527 and the adjusting worm 528 is ≤0.02mm, and the transmission ratio is 1:10, which can realize the slow and precise rotation of the first clamping block 54. The rotary drive motor 529 is connected to the adjusting worm 528 through a coupling and is used to adjust the clamping angle to adapt to the clamping requirements of different workpiece angles.

[0030] Preferred, see Figure 7 The second drive mechanism 53 includes a third telescopic rod 531, a second mounting plate 532, a second lateral drive unit, and a pair of mounting arms 535. The third telescopic rod 531 is mounted on the first mounting plate 521 and drives the second mounting plate 532 to move along the depth direction of the opening 21. The first mounting plate 521 has a guide rod 5212 parallel to the third telescopic rod 531 on the side near the opening 21. The second mounting plate 532 is slidably connected to the guide rod 5212 through a self-lubricating copper sleeve. The second lateral drive unit is mounted on the second mounting plate 532 and drives the mounting arms 535 to move along the width direction of the opening 21. The second clamping block 55 corresponds one-to-one with the mounting arm 535 and is connected to the side of the mounting arm 535 away from the opening 21.

[0031] The third telescopic rod 531 is a double-acting cylinder, and the guide rod 5212 is a chrome-plated optical shaft.

[0032] The second transverse drive unit includes a second bidirectional lead screw 533 and a second motor 534 connected to each other. The second mounting plate 532 is provided with a second slide rail 5321 on the side near the opening 21. The second bidirectional lead screw 533 is rotatably connected to the second mounting plate 532 and parallel to the second slide rail 5321. The second motor 534 is connected to the second mounting plate 532. The mounting arm 535 is slidably connected to the second slide rail 5321 and threadedly connected to the second bidirectional lead screw 533.

[0033] The second slide rail 5321 is a linear slide rail. The second bidirectional lead screw 533 is made of No. 45 steel, with a surface hardened finish and a thread precision of grade 7, enabling synchronous reverse movement of a pair of mounting arms 535; the mounting arms 535 and the second bidirectional lead screw 533 have a tight thread fit without any looseness; the second motor 534 has a power of 0.5kW-0.75kW and is connected to the second bidirectional lead screw 523 via a coupling.

[0034] Preferably, the clamping surfaces of the first clamping block 54 and the second clamping block 55 are both adhered with silicone pads with a hardness of Shore 50-60. The silicone pads are heat-resistant, and the clamping surfaces are arc-shaped to match the shape of the copper box P.

[0035] Preferred, see Figure 8 and Figure 9 The welding assembly 4 includes a first linear module 41, a fixed frame 42, a third mounting plate 43, a second linear module 44, a fourth telescopic rod 45, a laser welding head 46, and a swing cylinder 47. The first linear module 41 is mounted on the top surface of the U-shaped worktable 2 and drives the fixed frame 42 to move along the depth direction of the opening 21. The second linear module 44 is mounted on the fixed frame 42 and drives the third mounting plate 43 to move up and down. The fixed component 42 is provided with a lifting slide rail 421 on the side near the opening 21, which is parallel to the second linear module 44. The third mounting plate 43 is slidably connected to the lifting slide rail 421. The fourth telescopic rod 45 is mounted on the side of the third mounting plate 43 near the opening 21 via a turntable. The output end of the fourth telescopic rod 45 is connected to the laser welding head 46 and drives the laser welding head 46 to move along the width direction of the opening 21. The swing cylinder 47 is mounted on the side of the third mounting plate 43 away from the opening 21 and drives the fourth telescopic rod 45 to rotate, adapting to welding requirements at different positions.

[0036] The fixing frame 42 is made of stainless steel and is welded and fixed above the slide table of the first linear module 41. The welded structure is highly rigid and can withstand vibrations during the welding process. The lifting slide rail 421 is a linear slide rail, providing vertical guidance for the third mounting plate 43. The third mounting plate 43 is made of aluminum alloy. The fourth telescopic rod 45 is a multi-stage electric telescopic rod with a load capacity of not less than 5 kg. The laser welding head 46 is a fiber laser welding head, and the welding speed can be adjusted between 0.5 m / min and 2 m / min. It can achieve precise welding of stainless steel plate M and copper box P, with the weld width controlled between 0.5 mm and 1 mm and the welding strength not less than 90% of the base material strength. The swing cylinder 47 is a rotary swing cylinder with adjustable swing speed, which can flexibly adjust the swing angle of the fourth telescopic rod 45 and the laser welding head 46 to ensure uniform welding and adapt to the welding requirements of complex welds. The swing cylinder 47 is bolted to the third mounting plate 43, ensuring a firm and reliable installation.

[0037] The first linear module 41 and the second linear module 44 are both ball screw type linear modules, and the moving speed can be adjusted between 0.1m / s and 0.5m / s. The power of the drive motor is 0.75kW-1.1kW.

[0038] The first motor 523, the rotary drive motor 529, and the second motor 534 are all servo motors.

[0039] This invention discloses an integrated drilling and welding device for copper water box production. During the drilling stage, the outer first clamping block 54, driven by the first motor 523, clamps a solid copper block from the outside, ensuring the positioning rigidity of the three-axis drilling assembly 3 during processing. After drilling, the third telescopic rod 531 sends the inner second clamping block 55 into the hollow cavity. The second motor 534 drives the second bidirectional lead screw 533 to rotate, causing the second clamping block 55 to open outward, supporting the thin-walled workpiece copper box P from the inside. Subsequently, the outer first clamping block 54 is released, completing a seamless "outer-inner" switch. This structure ensures that the copper water box wall receives uniform internal support force during welding, effectively offsetting the shrinkage deformation caused by welding thermal stress, ensuring weld alignment accuracy and finished product sealing, and completely avoiding the cumbersome process and performance loss of traditional processes where preheating of solid copper leads to grain coarsening and the need for drilling. The device is well-suited for mass production of copper water boxes.

[0040] See Figure 10-12 A method for manufacturing a copper water box, using the aforementioned integrated drilling and welding device for copper water box production, includes the following specific steps: S1. External clamping and workpiece flipping positioning: Control the second drive mechanism 53 to move the second clamping block 55 out from above the opening 21 along the depth direction of the opening 21 via the third telescopic rod 531 to make room. Then control the first drive mechanism 52 to drive the first bidirectional lead screw 522 to rotate via the first motor 523, which will drive the first clamping block 54 to move along the width direction of the opening 21 to clamp and fix the copper block material. Then drive the adjusting worm gear 528 to rotate via the rotary drive motor 529, which will drive the copper block material to rotate with the adjusting worm wheel 527, so that the drilling surface of the copper block material faces the three-axis drilling assembly 3. The copper block material is made of red copper. S2, Drilling and Hollowing Forming Process: Control the three-axis drilling assembly 3 to drill the copper block raw material and process it into a copper box P; S3. Internal support positioning and internal and external clamping switching: Control the first drive mechanism 52 to rotate the copper box P through the rotary drive motor 529, and control the second drive mechanism 53 to move the second clamping block 55 into the copper box P through the third telescopic rod 531. Then, drive the second bidirectional lead screw 533 to rotate through the second motor 534, so that the second clamping block 55 can support and fix the copper box P from the inside, ready to enter the welding process. S4. Preheating before welding: Control the first drive mechanism 52 to drive the first clamping block 54 away from the copper box P, and then control the first telescopic rod 512 to drive the induction heating block 513 to move to the outside of the copper box P to heat the copper box P. The infrared temperature probe 514 detects the temperature of the welding area in real time. When the temperature reaches the welding process requirements, the first telescopic rod 512 drives the induction heating block 513 to return to its original position. S5. Stainless steel sheet loading and welding surface clamping and positioning: Stainless steel plate M is assembled on stainless steel clamping groove 515. The second telescopic rod 514 is controlled to move stainless steel plate M to the outside of copper box P. Then, the first drive mechanism 52 is controlled to drive the first clamping block 54 through the first motor 523 to clamp and fix stainless steel plate M and copper box P. After that, the second telescopic rod 514 drives stainless steel clamping groove 515 to return to its original position. Stainless steel plate M is made of 304 stainless steel, which is a standard specification for copper water box production. S6. Welding and forming: Control the synchronous movement of a pair of welding components 4. The first linear module 41 adjusts the front and rear positions of the fixing frame 42. The second linear module 44 drives the third mounting plate 43 to move up and down along the lifting slide rail 421. The fourth telescopic rod 45 adjusts the extension length of the laser welding head 46. The swing cylinder 47 drives the laser welding head 46 to rotate to adapt to the welding angle. The laser welding head 46 continuously welds the joint between the stainless steel plate M and the copper box P, fixing the stainless steel plate M and the copper box P. After completion, each mechanism is reset in sequence, and the finished copper water box is removed, thus completing one drilling and welding integrated processing flow.

[0041] Preferably, in step S4, an infrared temperature measurement fuzzy adaptive temperature control algorithm is used, specifically including: A fuzzy rule base is established using the temperature T collected by the infrared temperature probe 514 as input. When T < 300℃, the output heating power of the induction heating block 513 is 100%; When 300℃≤T<380℃, the output heating power of the induction heating block 513 is 40%-60%; When T≥380℃, the induction heating block 513 immediately stops heating, and the temperature is controlled within ±10℃. After reaching the target temperature, it is maintained for 10s-15s to complete uniform preheating before welding.

[0042] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. An integrated drilling and welding device for the production of copper water boxes, characterized in that, It includes a base plate (1), a U-shaped worktable (2), a three-axis drilling assembly (3), a pair of welding assemblies (4), and a clamping assembly (5); The U-shaped worktable (2) and the triaxial drilling assembly (3) are both mounted on the base plate (1); The triaxial drilling assembly (3) is located inside the opening (21) of the U-shaped worktable (2); The pair of welding components (4) are symmetrically arranged on the top surface of the U-shaped workbench (2) on both sides of the opening (21); The clamping assembly (5) includes a support frame (51), a first drive mechanism (52), a second drive mechanism (53), and a pair of first clamping blocks (54) and a pair of second clamping blocks (55) located above the opening (21). The pair of first clamping blocks (54) are sleeved on the outside of the pair of second clamping blocks (55). The support frame (51) is set on the top surface of the U-shaped worktable (2) relative to the opening (21). The first drive mechanism (52) is mounted on the support frame (51) and drives the first clamping blocks (54) to move along the width direction of the opening (21) and rotate around the movement trajectory. The second drive mechanism (53) is mounted on the first drive mechanism (52) and drives the second clamping blocks (55) to move along the width direction and depth direction of the opening (21).

2. The integrated drilling and welding device for copper water box production according to claim 1, characterized in that, The support frame (51) includes a pair of U-shaped frames (511), and a preheating component and a stainless steel clamping component corresponding to each U-shaped frame (511). The U-shaped frames (511) are vertically connected to the top surface of the opening (21) of the U-shaped worktable (2). The opening end of the U-shaped frame (511) is located above the opening (21). The preheating component and the stainless steel clamping component are respectively installed at the top and bottom of the opening end of the U-shaped frame (511).

3. The integrated drilling and welding device for copper water box production according to claim 2, characterized in that, The preheating assembly includes a first telescopic rod (512) and an induction heating block (513) connected together, as well as an infrared temperature probe (514). The first telescopic rod (512) is installed at the top of the opening end of the U-shaped frame (511) to drive the induction heating block (513) to move up and down. The infrared temperature probe (514) is installed at the top of the opening end of the U-shaped frame (511) to detect the temperature of the copper box (P). The stainless steel clamping assembly includes a second telescopic rod (515) and a stainless steel clamping groove (516) connected together. The second telescopic rod (515) is installed at the bottom of the opening end of the U-shaped frame (511) to drive the stainless steel clamping groove (516) to move up and down.

4. The integrated drilling and welding device for producing copper water boxes according to claim 1, characterized in that, The first driving mechanism (52) includes a first mounting plate (521), a first transverse driving unit, and a transverse plate (524), a support arm (525), a connecting plate (526), ​​and a rotation driving unit corresponding to the first clamping block (54). The first mounting plate (521) is connected to the support frame (51). The transverse driving unit is mounted on the first mounting plate (521) and drives the transverse plate (524) to move along the width direction of the opening (21). One end of the support arm (525) is connected to the transverse plate (524), and the other end is connected to the connecting plate (526). The first clamping block (54) is rotatably connected to the side of the connecting plate (526) near the opening (21). The rotation driving unit is mounted on the connecting plate (526) and drives the first clamping block (54) to rotate around the moving trajectory.

5. The integrated drilling and welding device for producing copper water boxes according to claim 4, characterized in that, The first transverse drive unit includes a first bidirectional lead screw (522) and a first motor (523) connected together. The first bidirectional lead screw (522) is rotatably connected to the first mounting plate (521). The first motor (523) is mounted on the first mounting plate (521). The transverse plate (524) is threadedly connected to the first bidirectional lead screw (522). The rotary drive unit includes an adjusting worm gear (527), an adjusting worm (528), and a rotary drive motor (529). The adjusting worm gear (527) is axially connected to the first clamping block (54) and radially meshes with the adjusting worm (528). The rotary drive motor (529) is mounted on the connecting plate (526) and drives the adjusting worm (528) to rotate.

6. The integrated drilling and welding device for producing copper water boxes according to claim 4, characterized in that, The second drive mechanism (53) includes a third telescopic rod (531), a second mounting plate (532), a second transverse drive unit, and a pair of mounting arms (535). The third telescopic rod (531) is mounted on the first mounting plate (521) and drives the second mounting plate (532) to move along the depth direction of the opening (21). The second transverse drive unit is mounted on the second mounting plate (532) and drives the mounting arms (535) to move along the width direction of the opening (21). The second clamping block (55) corresponds one-to-one with the mounting arm (535) and is connected to the side of the mounting arm (535) away from the opening (21).

7. The integrated drilling and welding device for producing copper water boxes according to claim 6, characterized in that, The second transverse drive unit includes a second bidirectional lead screw (533) and a second motor (534) connected to each other. The second bidirectional lead screw (533) is rotatably connected to the second mounting plate (532). The second motor (534) is mounted on the second mounting plate (532). The mounting arm (535) is threadedly connected to the second bidirectional lead screw (533).

8. The integrated drilling and welding device for producing copper water boxes according to claim 1, characterized in that, The clamping surfaces of the first clamping block (54) and the second clamping block (55) are both covered with silicone pads with a Shore hardness of 50-60 degrees. The clamping surfaces are arc-shaped and match the shape of the copper box (P).

9. The integrated drilling and welding device for producing copper water boxes according to claim 1, characterized in that, The welding assembly (4) includes a first linear module (41), a fixed frame (42), a third mounting plate (43), a second linear module (44), a fourth telescopic rod (45), a laser welding head (46), and a swing cylinder (47). The first linear module (41) is mounted on the top surface of the U-shaped worktable (2) and drives the fixed frame (42) to move along the depth direction of the opening (21). The second linear module (44) is mounted on the fixed frame (42) and drives the third mounting plate (43) to move up and down. The fourth telescopic rod (45) is mounted on the side of the third mounting plate (43) near the opening (21) via a turntable and drives the laser welding head (46) to move along the width direction of the opening (21). The swing cylinder (47) is mounted on the side of the third mounting plate (43) away from the opening (21) and drives the fourth telescopic rod (45) to rotate.

10. A method for preparing a copper water box, characterized in that, The specific steps of using the integrated drilling and welding device for producing copper water boxes as described in claim 3 are as follows: S1. External clamping and workpiece flipping positioning: Control the second drive mechanism (53) to move the second clamping block (55) out from above the opening (21) along the depth direction of the opening (21), control the first drive mechanism (52) to drive the first clamping block (54) to move along the width direction of the opening (21) to clamp and fix the copper block material, and rotate the copper block material so that its drilling working surface faces the three-axis drilling assembly (3). S2, Drilling and hollowing forming process: Control the three-axis drilling assembly (3) to drill the copper block raw material and process it into a copper box (P); S3, Internal support positioning and internal and external clamping switching: Control the first drive mechanism (52) to rotate the copper box (P), and control the second drive mechanism (53) to move the second clamping block (55) into the copper box (P) to support and fix the copper box (P) from the inside. S4. Preheating before welding: Control the first drive mechanism (52) to drive the first clamping block (54) away from the copper box (P), and then control the first telescopic rod (512) to drive the induction heating block (513) to move to the outside of the copper box (P) to heat the copper box (P). The infrared temperature probe (514) detects the temperature of the welding area in real time. When the temperature reaches the welding process requirements, the induction heating block (513) returns to its original position. S5. Stainless steel sheet loading and welding surface clamping and positioning: Stainless steel plate (M) is assembled on stainless steel clamping groove (515), the second telescopic rod (514) is controlled to move stainless steel plate (M) to the outside of copper box (P), and then the first drive mechanism (52) is controlled to drive the first clamping block (54) to clamp and fix stainless steel plate (M) and copper box (P), and then stainless steel clamping groove (515) is returned to its original position. S6. Welding and forming: Control the welding assembly (4) to weld and fix the stainless steel plate (M) to the copper box (P).

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