Furniture metal sheet welding process based on multi-section compression anti-warping structure

Abstract

The application relates to the technical field of metal welding, and discloses a furniture metal sheet welding process based on a multi-section compression anti-warping structure, which comprises the following steps: S1, checking the sheet material, thickness and surface state, making the sheet material meet the requirements, and clearly defining the weld position and length; S2, using the methods of chemical cleaning, mechanical polishing and sand blasting to remove the oil stains, rust, oxide scale impurities on the surface of the metal sheet, making the surface expose the metal luster, and ensuring the welding quality. The furniture metal sheet welding process based on the multi-section compression anti-warping structure can effectively solve the problems in the prior art that plastic deformation is caused during the welding of the metal sheet, and then the sheet appears the warping phenomenon; the warping can make the welded metal sheet deviate from the originally designed size specification, causes the poor cooperation in the subsequent assembly process, increases the assembly difficulty and cost, and even causes the problem that the whole product cannot be normally assembled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal welding, in particular to a furniture metal sheet welding process based on a multi-section compression anti-warping structure. BACKGROUND

[0002] In modern furniture manufacturing, metal sheets are widely used in structural and decorative parts of various furniture products due to their lightweight, high strength, easy processing, and good surface decoration. In these application scenarios, metal sheets often need to be connected through welding process to meet the structure and function requirements of different products. The metal sheet itself is relatively thin, with relatively low stiffness and strength.

[0003] In the prior art, during welding, the local area of the metal sheet will be subjected to concentrated high heat input, causing the metal in the weld and its vicinity to rapidly expand, while the area away from the weld has a smaller temperature change. This uneven temperature distribution will cause complex thermal stress inside the material. When the thermal stress exceeds the yield strength of the metal sheet, plastic deformation will occur, leading to warping of the sheet. Warping will cause the welded metal sheet to deviate from the originally designed size specifications, resulting in poor fit during subsequent assembly, increasing assembly difficulty and cost, and even causing the entire product to be unable to be normally assembled. SUMMARY

[0004] To overcome the above-mentioned shortcomings of the prior art, the present application provides a furniture metal sheet welding process based on a multi-section compression anti-warping structure, which can effectively solve the problem that in the prior art, during welding, the local area of the metal sheet will be subjected to concentrated high heat input, causing the metal in the weld and its vicinity to rapidly expand, while the area away from the weld has a smaller temperature change. This uneven temperature distribution will cause complex thermal stress inside the material. When the thermal stress exceeds the yield strength of the metal sheet, plastic deformation will occur, leading to warping of the sheet. Warping will cause the welded metal sheet to deviate from the originally designed size specifications, resulting in poor fit during subsequent assembly, increasing assembly difficulty and cost, and even causing the entire product to be unable to be normally assembled.

[0005] To achieve the above-mentioned purposes, the present application is implemented by the following technical solutions:

[0006] The present application provides a furniture metal sheet welding process based on a multi-section compression anti-warping structure, comprising:

[0007] S1, check the sheet material, thickness and surface state to meet the requirements, and determine the weld position and length;

[0008] S2, using chemical cleaning, mechanical polishing, sand blasting method to remove the surface of the metal sheet oil, rust, scale impurities, so that the surface of the metal gloss, to ensure the welding quality;

[0009] S3, the metal sheet is placed in the welding equipment, according to the specific requirements of the butt welding of metal sheet;

[0010] S4, the slag, spatter impurities on the surface of the weld are removed to check the quality of the weld, and the slag is cleaned by using a professional slag cleaning tool;

[0011] S5, intercepting the weld sample for tensile test, detecting the internal defects of the key parts, polishing and polishing according to the final requirement of the furniture, so that the weld and the base material transition naturally, and the aesthetic effect is achieved;

[0012] Among them, the welding equipment in S3 includes a placing part, the placing part includes a workbench, the upper surface of the workbench is fixedly connected with a rack, the rack is provided with two and symmetrically distributed along the upper surface of the workbench, the adjacent surfaces of the two racks are fixedly connected with a moving shaft, and the moving shaft is provided with an anti-warping piece for pressing the external sheet through the electric sliding rail formed in the lower surface thereof;

[0013] Among them, the anti-warping piece includes a support plate, the support plate is provided with two, the two support plates are symmetrically distributed on both sides of the workbench, the outer end of the support plate is fixedly connected with a shaft sleeve, the shaft sleeve is rotatably connected with a gear through a rotating shaft arranged on the circumferential inner surface thereof, the circumferential outer surface of the gear is meshingly connected with a chain, and the outer surface of the chain is fixedly connected with a pressing plate;

[0014] The welding gun body is fixedly connected with the upper surface of the support plate through the connecting frame arranged on the outer surface thereof.

[0015] Further, a circular groove is formed in the lower surface of the support plate, and a ball is rotatably connected in the circular groove and abuts against the pressing plate close to the support plate.

[0016] Further, the outer surface side of the pressing plate away from the support plate is designed with a small arc angle, and the lower surface side of the support plate is designed with a large arc angle.

[0017] Further, the two support plates are fixedly connected with a connecting plate, the connecting plate is vertically and slidably connected with a connecting column in the inside, the top end of the connecting column is slidably connected with the inside of the electric sliding rail, the outer surface of the connecting column is sleeved with a spring connected with the upper surface of the connecting plate, and the upper end of the spring is provided with a limiting plate fixedly connected with the outer surface of the connecting column.

[0018] Furthermore, a gear is fixedly connected to the side of the rotating tooth near the welding gun body, and a rack that meshes with the outer surface of the gear is slidably connected to the connecting plate through a through hole opened inside it. The rack is connected to the lower surface of the frame through a sliding column inside it.

[0019] Furthermore, a welded rod is fixedly connected to the lower surface of one of the connecting columns located on the front side, and the welded rod has an inverted triangular cross-section.

[0020] Furthermore, a side plate is slidably connected to one of the connecting plates located on the front side via a screw disposed on its outer surface, and a roller is rotatably connected to the lower surface of the side plate.

[0021] Furthermore, a pressure roller is rotatably connected to the side of the side plate near the welding gun body.

[0022] The technical solution provided by this invention has the following advantages compared with the prior art:

[0023] This invention includes an anti-bending component, gears, and a rack. In the anti-bending component, a gear is fixedly connected to the outer surface of a rotating tooth near the welding gun body. When the anti-bending component moves in the front-to-back direction, it can rotate while sliding forward and backward through the meshing of the gear and rack. The chain drives multiple pressure plates to move counterclockwise in a circular motion, sequentially contacting the surface of the thin metal sheet to form segmented clamping force. This prevents plastic deformation of the thin metal sheet caused by uneven heating during welding. Compared with cylindrical rollers, the pressure plates avoid the problem of accelerated deformation of the thin sheet due to excessive local pressure. The sides of the pressure plates feature a small arc angle design to fit the surface of the thin sheet and avoid scratching during rotation. The large arc angle on the lower surface of the support plate gradually applies downward pressure to the pressure plates. As the pressure plates move, the rolling balls reduce friction. The multiple rolling balls ensure even distribution of the extrusion force, comprehensively reducing the risk of damage to the surface of the thin sheet and ensuring smooth and efficient clamping. The side of the pressure plate away from the chain is made of rubber to protect the surface quality of the thin metal sheet. Before welding, the pressure plate located below the front half of the welding gun body has already fixed the position of the thin metal plate. After welding, the pressure plate stays in the same position on the thin metal plate for a period of time and then is released again. The brief fixation and release of the pressure plate can release the local stress caused by thermal expansion and prevent the plate from tearing. The new pressure plate in front is replenished and tightened in real time to ensure the accuracy of the position of the thin metal plate before welding, maintain the flatness of the welding area, solve the wavy deformation caused by thermal expansion and contraction during thin plate welding, and improve the weld strength. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0025] Figure 1 This is a flowchart illustrating the welding process of thin metal sheets for furniture based on a multi-segment compression anti-warping structure, as described in an embodiment of the present invention.

[0026] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional structural diagram of the workbench according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the gear, rack, and weld rod according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the separation structure of the anti-bending component, connecting plate, and connecting frame according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the support plate, ball bearings, and bushing according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the side plate, roller, and pressure roller according to an embodiment of the present invention;

[0032] Figure 8 This is a cross-sectional structural diagram of the support plate according to an embodiment of the present invention.

[0033] The labels in the diagram represent: 1. Placement section; 11. Workbench; 12. Frame; 13. Shifting axis; 131. Electric slide rail; 14. Anti-bend component; 141. Support plate; 1411. Ball bearing; 142. Bushing; 143. Rotary gear; 144. Chain; 145. Pressure plate; 15. Connecting plate; 150. Through hole; 151. Connecting column; 152. Spring; 153. Limiting plate; 16. Gear; 161. Rack; 162. Sliding column; 17. Welding rod; 18. Screw; 181. Side plate; 182. Roller; 183. Pressure roller; 2. Welding gun body; 21. Connecting frame. Detailed Implementation

[0034] 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0035] The present invention will be further described below with reference to embodiments. Example

[0036] Please see Figures 1-8 This invention provides a technical solution: a welding process for thin metal sheets used in furniture based on a multi-segment compression anti-warping structure, comprising:

[0037] S1. Verify the material, thickness, and surface condition of the thin plate to ensure they meet the requirements, and clarify the location and length of the weld.

[0038] S2. Use chemical cleaning, mechanical grinding, and sandblasting methods to remove oil, rust, oxide scale, and other impurities from the surface of the thin metal sheet, so that the surface reveals a metallic luster to ensure welding quality.

[0039] S3. Place the metal sheet into the welding equipment and complete the butt welding of the metal sheet according to specific requirements;

[0040] S4. Remove slag and spatter from the weld surface to check the weld quality. Use professional slag removal tools to clean the slag.

[0041] S5. Take weld samples for tensile testing, inspect key components for internal defects, and perform grinding and polishing according to the final requirements of the furniture to make the weld transition naturally with the substrate and achieve an aesthetic effect.

[0042] Among them, the welding equipment in S3 includes a placement part 1, which includes a workbench 11. A frame 12 is fixedly connected to the upper surface of the workbench 11. Two frames 12 are provided and symmetrically distributed along the upper surface of the workbench 11. A sliding shaft 13 is fixedly connected between the adjacent surfaces of the two frames 12. The sliding shaft 13 is provided with anti-bending parts 14 for pressing the outer thin plate through an electric slide rail 131 opened on its lower surface.

[0043] Among them, the anti-bending component 14 includes a support plate 141. There are two support plates 141, which are symmetrically distributed on both sides of the workbench 11. The outer end of the support plate 141 is fixedly connected to a bushing 142. The bushing 142 is rotatably connected to a rotating tooth 143 through a rotating shaft set on its inner circumference. The outer circumference of the rotating tooth 143 is meshed with a chain 144. The outer surface of the chain 144 is fixedly connected to a pressure plate 145.

[0044] The welding gun body 2 is fixedly connected to the upper surface of the support plate 141 via a connecting frame 21 disposed on its outer surface. Two sets of anti-bending components 14 are provided, which are symmetrically distributed along the left and right sides of the welding gun body 2, and each set of anti-bending components 14 corresponds to a thin metal plate.

[0045] The lower surface of the support plate 141 is provided with a circular groove, and the inside of the circular groove is rotatably connected to a ball bearing 1411 that is in contact with the pressure plate 145 near the support plate 141.

[0046] The outer surface of the pressure plate 145 away from the support plate 141 has a small arc angle design, while the lower surface of the support plate 141 has a large arc angle design. The outer surface of the pressure plate 145 away from the chain 144 is made of rubber to protect the surface quality of the thin metal plate.

[0047] A connecting plate 15 is fixedly connected between two support plates 141. A connecting column 151 is vertically slidably connected inside the connecting plate 15. The top end of the connecting column 151 is slidably connected to the inside of the electric slide rail 131. A spring 152 connected to the upper surface of the connecting plate 15 is sleeved on the outer surface of the connecting column 151. A limiting plate 153 fixedly connected to the outer surface of the connecting column 151 is provided at the upper end of the spring 152.

[0048] A gear 16 is fixedly connected to the side of the rotating gear 143 near the welding gun body 2. A rack 161 that meshes with the outer surface of the gear 16 is slidably connected to the connecting plate 15 through a through hole 150 opened inside it. The rack 161 is connected to the lower surface of the frame 12 through a sliding column 162 that slides inside it.

[0049] A weld rod 17 is fixedly connected to the lower surface of a connecting column 151 located on the front side and is slidably connected to the surface of the workbench 11. The cross-section of the weld rod 17 adopts an inverted triangular design.

[0050] A connecting plate 15 located on the front side is slidably connected to a side plate 181 by a screw 18 provided on its outer surface, and a roller 182 is rotatably connected to the lower surface of the side plate 181.

[0051] A pressure roller 183 is rotatably connected to the side plate 181 near the welding gun body 2.

[0052] In practical applications, in the initial state, in the placement section 1, the anti-bending component 14, connecting plate 15, weld rod 17, side plate 181, and pressure roller 183 are all within their stroke range and positioned near the rear. Two metal sheets to be processed are placed on the upper surface of the worktable 11 and on the left and right sides of the welding gun body 2. The position of the metal sheets is adjusted so that one side of the metal sheet is inserted into the lower surface of the pressure roller 183, and the adjacent surfaces of the two metal sheets are brought together, so that the side of the metal sheet contacts the outer surface of the weld rod 17. The upper surface of the worktable 11 is designed with an electromagnetic chuck, which can adsorb the external metal sheets.

[0053] The weld rod 17 has an inverted triangular cross-section, with a wider upper section and a narrower lower section, exhibiting a gradient design. The weld rod 17, with its pre-designed slope, allows for the pre-reservation of weld seams for metal plates of varying thicknesses. For thicker metal plates, a larger pre-reserved weld seam is required; for thinner metal plates, the required pre-reserved weld seam needs to be correspondingly smaller. When the metal plate is thicker, the height of the upper edges of the two metal plates near the outer surface of the welding gun body 2 increases accordingly, increasing the contact height with the inclined surface of the weld rod 17. Because the weld rod 17 is wider near the top, the width of the weld seam formed by the two plates increases accordingly.

[0054] By adjusting the nut at screw 18, the side plate 181, roller 182, and pressure roller 183 slide horizontally until the outer surface of the outer circumference of roller 182 is in contact with the side of the metal sheet, and the nut fixes the side plate 181 in this position. At this time, the left and right sides and the top and bottom sides of the metal sheet are all limited.

[0055] When the equipment is started, an electric slide rail 131 is provided on the lower surface of the shift shaft 13. Both ends of the shift shaft 13 are fixedly connected to the upper surface of the worktable 11 via the frame 12. The electric slide rail 131 drives the anti-bend component 14 to move forward through the connecting column 151. Under the action of the slide column 162, the rack 161 can only slide in the vertical direction and cannot move in the horizontal direction. When the anti-bend component 14 moves forward, the gear 16, which is fixedly connected to the outer surface of the rotating tooth 143, moves relative to the rack 161. The rack 161 remains stationary, and the gear 16 meshes with the teeth on the upper surface of the rack 161 during displacement. At the same time, the rotating tooth 143 rotates under the drive of the rotating shaft in the bushing 142, and the chain 144 meshing with the rotating tooth 143 moves, so that multiple pressure plates 145 sequentially abut against the upper surface of the worktable 11 along the chain 144.

[0056] As the anti-bend component 14 continues to move forward, taking a view from right to left as an example, multiple pressure plates 145 perform a counter-clockwise circular motion under the action of the chain 144. One of the pressure plates 145 moves forward from above the chain 144, and continues to rotate counter-clockwise on the outer surface of the rotating tooth 143 during the movement. When the distance between the foremost pressure plate 145 and the rear end of the metal sheet gradually approaches, one of the pressure plates 145 moves downward counter-clockwise, and the small arc edge of the outer surface of this pressure plate 145 contacts the surface of the metal sheet, pressing the metal sheet under the anti-bend component 14. As the chain 144, which meshes with the rotating tooth 143, continues to move, multiple pressure plates 145 sequentially adhere to the surface of the sheet along the chain 144, achieving multi-segment pressing of the sheet. The small arc angle design on the side of the pressure plate 145 allows it to better adhere to the sheet, avoiding damage to the surface of the metal sheet during rotation.

[0057] When the lower surfaces of all the pressure plates 145 located below are in contact with the upper surface of the metal sheet, the anti-bending member 14 presses the metal sheet from top to bottom. Correspondingly, under the action of the thickness of the metal sheet, the anti-bending member 14 and the connecting plate 15 move slightly upward relative to the connecting column 151, the distance between the upper surface of the connecting plate 15 and the lower surface of the limiting plate 153 decreases, and the spring 152 always applies downward pressure to the connecting plate 15, thereby driving the support plate 141 to squeeze the pressure plates 145 to press the metal sheet.

[0058] During the vertical displacement of the connecting plate 15, the rack 161 is located inside the through hole 150 and moves up and down synchronously with the connecting plate 15. The two ends of the rack 161 also slide vertically relative to the sliding column 162. The rack 161 moves with the connecting plate 15 through the through hole 150, which ensures that the rack 161 and the gear 16 are always in a meshing state, allowing the anti-bending component 14 to rotate continuously during the forward and backward movement. This achieves the effect of the pressure plate 145 acting sequentially on the surface of the thin plate, forming a multi-stage clamping force. This multi-stage clamping method can disperse the pressure on the thin metal plate, avoid excessive local pressure that could cause deformation of the thin metal plate, and ensure that the thin plate is firmly fixed during welding. It can also adapt to welding of thin metal plates of different thicknesses, providing elastic clamping force for the thin metal plate.

[0059] The large arc angle design of the lower surface of the support plate 141 avoids interference with the pressure plate 145 during rotation, ensuring that the pressure plate 145 smoothly enters the lower surface of the support plate 141 through counterclockwise rotation. During this process, the ball bearings 1411 in the circular groove on the lower surface of the support plate 141 roll in close contact with the upper surface of the pressure plate 145 below, reducing the friction when the pressure plate 145 moves and ensuring smooth pressing action. Multiple ball bearings 1411 are provided to ensure a more uniform distribution of extrusion pressure and avoid scratches on the metal sheet caused by uneven pressure distribution.

[0060] The process of welding thin metal sheets:

[0061] The welding gun body 2 is fixed to the support plate 141 via the connecting frame 21 and moves synchronously with the anti-bending component 14. After the thin plate is clamped and fixed in multiple sections, the welding gun body 2 begins to weld the thin plate. During the welding process, the weld rod 17 slides on the surface of the worktable 11. Its inverted triangular cross-section design helps guide the welding gun body 2 to move stably along the weld direction, ensuring the accuracy of the welding path. At the same time, the roller 182 on the lower surface of the side plate 181 rolls on the surface of the worktable 11. The side of the outer circumference of the roller 182 is in contact with the side of the metal sheet and rotates with the moving roller 182, always pressing against the side of the metal sheet. The pressure roller 183 on the side of the side plate 181 near the welding gun body 2 applies additional pressure to the thin plate, further preventing the thin plate from warping and deforming during the welding process. The roller 182 works in conjunction with the weld rod 17 to prevent the metal sheet from shifting in the left and right directions during the welding process, thus keeping the weld between the two metal sheets constant and preventing the metal sheet placement path from shifting due to the continuous movement of the anti-bending component 14, thereby ensuring the welding quality.

[0062] Before welding, the weld bar 17 cooperates with the roller 182 to limit the metal sheet in the left and right directions, ensuring a uniform weld. Simultaneously, the anti-bending component 14 in the front half clamps the metal sheet. As the welding gun body 2 passes the weld seam of the metal sheet, it performs uniform laser welding between the two metal sheets. As the anti-bending component 14 continues to move forward, the pressure plate 145 pressed against the bottom of the initial welding point remains fixed, maintaining a clamping state for a period of time. Meanwhile, new pressure plates 145 continuously press against the metal sheet in front, gradually loosening as the pressure plate 145 at the initial welding point gradually releases. During welding, the metal sheet undergoes dynamic deformation due to thermal expansion and cooling contraction. The brief fixation of the initial pressure plate 145 provides a stable foundation for the initial welding stage, ensuring good weld root formation. Subsequent loosening releases the localized stress accumulated from continuous clamping, preventing stress concentration that could lead to sheet tearing or excessive deformation. Meanwhile, the real-time additional pressing of the new front pressure plate 145 can dynamically conform to the deformation trend of the thin plate, maintain the flatness of the welding area, and meet the high precision requirements of furniture manufacturing.

[0063] All the pressure plates 145 move forward until they detach from the upper surface of the metal sheet, the spring 152 returns to its original state, and drives the connecting column 151 to move upward, thus completing the welding of the two metal sheets. The electric slide rail 131 drives the anti-bend component 14 and the welding gun body 2 back to the initial position. Finally, the welded metal sheet is removed from the workbench 11 for subsequent cleaning and inspection.

[0064] In summary, the above process has the following advantages:

[0065] Advantage 1: The weld bar 17, together with the side plate 181, roller 182 and pressure roller 183, provides horizontal sliding limit, thereby achieving omnidirectional fixation of the thin plate in the left-right and up-down directions. This enables the centering and positioning of the two metal thin plates before welding, avoiding positional shift before welding.

[0066] Advantage 2: The anti-bending component 14, via gear 16 and rack 161, can rotate while sliding back and forth. The chain 144 drives multiple pressure plates 145 to move counterclockwise in a circular motion, sequentially contacting the surface of the thin plate to form segmented clamping force. Compared with cylindrical rollers, the pressure plates 145 avoid the problem of thin plate deformation caused by excessive local pressure. The sides of the pressure plates 145 adopt a small arc angle design to contact the surface of the thin plate and avoid scratching during rotation. The large arc angle on the lower surface of the support plate 141 can gradually apply downward pressure to the metal sheet of the pressure plates 145. When the pressure plates 145 move, the rolling balls 1411 reduce friction. The arrangement of multiple balls 1411 ensures that the extrusion force is evenly distributed, reducing the risk of damage to the surface of the thin plate from all directions and ensuring smooth and efficient clamping action. The side of the pressure plates 145 away from the chain 144 adopts a rubber design to protect the surface quality of the metal sheet.

[0067] Advantage 3: Weld rod 17 plays a guiding role in the welding process. Its cross-section adopts an inverted triangular design. The slope of the side can automatically adjust the reserved width of the weld according to the thickness of the thin plate (wide weld for thick plate, narrow weld for thin plate) and achieve precise guidance in the welding process to ensure uniform weld.

[0068] Fourthly, before welding, the pressure plate 145 located below the front half of the welding gun body 2 fixes the position of the thin metal plate. After welding, the pressure plate 145 remains in the same position on the thin metal plate for a period of time before being released again. This brief fixation and release of the pressure plate 145 releases local stress caused by thermal expansion, preventing the plate from tearing. A new pressure plate 145 in front continuously applies additional pressure, ensuring the accuracy of the thin metal plate's position before welding and maintaining the flatness of the welding area. This solves the problem of wavy deformation caused by thermal expansion and contraction during thin plate welding, improves weld strength, and ensures high-quality welding throughout the entire process.

[0069] Advantage 5: The welding gun body 2 moves synchronously with the anti-bending component 14. After the thin plate is pressed by multiple pressure plates 145, the weld rod 17 slides on the worktable 11, guiding the welding gun body 2 to move stably along the weld direction. The rollers 182 on the lower surface of the side plate 181 roll and press against the side of the metal sheet, and the pressure rollers 183 apply additional pressure to prevent warping caused by excessive pressure. The two work together to prevent the thin plate from shifting left and right, maintain a constant weld and a precise path, and ensure the welding quality of the metal sheet.

[0070] Advantage 6: The connecting plate 15, the limiting plate 153, and the spring 152 work together to automatically adjust the clamping height according to the thickness of the thin plate, ensuring that the pressure plate 145 is tightly attached to the surface of the thin plate and providing a stable clamping force. At the same time, the rack 161 moves synchronously with the connecting plate 15 in the vertical direction through the through hole 150, which can be used to clamp plates of different thicknesses. The rack 161 is always engaged with the gear 16, ensuring that the pressure plate 145 continues to rotate around a ring when the anti-bending part 14 moves back and forth, avoiding transmission failure and improving adaptability.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A furniture sheet metal welding process based on multi-segment compression anti-warping structure, characterized in that, The method comprises the following steps: S1, checking the material, thickness and surface state of the sheet metal to meet the requirements, and determining the position and length of the weld; S2, using chemical cleaning, mechanical polishing and sand blasting to remove oil stains, rust, scale and other impurities on the surface of the metal sheet, so that the surface is exposed to metal luster, to ensure the welding quality; S3, placing the metal sheet into the welding equipment and completing the butt welding of the metal sheet according to the specific requirements; S4, removing the welding slag and spatter on the surface of the weld to check the quality of the weld, and using professional slag cleaning tools to clean the welding slag; S5, cutting the weld sample for tensile test, detecting the internal defects of the key parts, polishing and polishing according to the final requirements of the furniture, making the transition of the weld and the base material natural, and achieving the aesthetic effect; The welding equipment in S3 comprises a placing part (1), the placing part (1) comprises a workbench (11), the upper surface of the workbench (11) is fixedly connected with a rack (12), the rack (12) is provided with two and is symmetrically distributed along the upper surface of the workbench (11), the adjacent surfaces of the two racks (12) are fixedly connected with a shift shaft (13), and the shift shaft (13) is provided with an anti-bending piece (14) for pressing the outer sheet through the electric sliding rail (131) formed in the lower surface thereof; The anti-bending piece (14) comprises a support plate (141), the support plate (141) is provided with two, the two support plates (141) are symmetrically distributed on the two sides of the workbench (11), the outer end of the support plate (141) is fixedly connected with a shaft sleeve (142), the shaft sleeve (142) is rotatably connected with a gear wheel (143) through the rotation shaft arranged on the circumferential inner surface thereof, the circumferential outer surface of the gear wheel (143) is meshingly connected with a chain (144), and the outer surface of the chain (144) is fixedly connected with a pressing plate (145); The welding gun body (2) is fixedly connected with the upper surface of the support plate (141) through the connecting frame (21) arranged on the outer surface thereof; The lower surface of the support plate (141) is provided with a circular groove, and the inside of the circular groove is rotationally connected with a ball (1411) which is close to the abutting plate (145) and adheres to the support plate (141), the outer surface side of the abutting plate (145) away from the support plate (141) is designed with a small arc angle, the lower surface side of the support plate (141) is designed with a large arc angle, the two support plates (141) are fixedly connected with a connecting plate (15), the inside of the connecting plate (15) is slidably connected with a connecting column (151), the top end of the connecting column (151) is slidably connected with the inside of the electric sliding rail (131), the outer surface of the connecting column (151) is sleeved with a spring (152) connected with the upper surface of the connecting plate (15), and the upper end of the spring (152) is provided with a limiting plate (153) fixedly connected with the outer surface of the connecting column (151), the gear (16) is fixedly connected with the gear (16) on the side close to the welding gun body (2), the connecting plate (15) is slidably connected with the rack (161) engaged with the outer surface of the gear (16) through the through hole (150) formed in the inside thereof, and the rack (161) is connected with the lower surface of the rack (12) through the slide column (162) slidably arranged in the inside thereof.

2. The furniture sheet metal welding process based on multi-section compression anti-warping structure according to claim 1, characterized in that: The lower surface of the connecting column (151) on the front side is fixedly connected with a welding seam rod (17) slidably connected with the surface of the workbench (11), and the cross section of the welding seam rod (17) is designed in an inverted triangular shape.

3. The furniture sheet metal welding process based on multi-section compression anti-warping structure according to claim 1, characterized in that: The connecting plate (15) on the front side is slidably connected with a side plate (181) through the screw rod (18) arranged on the outer surface thereof, and the lower surface of the side plate (181) is rotationally connected with a roller (182).

4. The furniture sheet metal welding process based on multi-section compression anti-warping structure according to claim 3, characterized in that: The side close to the welding gun body (2) of the side plate (181) is rotationally connected with a pressing wheel (183).

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