Automatic welding machine for stainless steel cabinet

Abstract

The invention provides a stainless steel cabinet automatic welding machine, and particularly relates to the technical field of welding equipment, the stainless steel cabinet automatic welding machine comprises a main machine table, a welding mechanical arm arranged on the main machine table, a double-body vertical frame arranged above the main machine table in a striding manner, and a welding gun mounted at the working end of the welding mechanical arm, the combined type welding mechanism is arranged on the main machine table and used for bearing a stainless steel plate; according to the automatic welding device for the stainless steel cabinet body for the kitchen, through cooperation of the composite welding mechanism and the adaptive adjusting assembly, positioning of stainless steel cabinet bodies of multiple specifications can be achieved, limiting groove blocks are driven to move through embedded nuts, and then the positions of positioning clamping plates are adjusted; and when the stainless steel cabinet body is automatically adjusted by a servo motor during large-scale production, cabinet body plates with different sizes can be adapted without replacing the clamp, so that the remodeling time is greatly shortened, and the welding production capacity of the stainless steel cabinet body is improved.

Description

Technical Field

[0001] This invention provides an automatic welding machine for stainless steel cabinets, specifically relating to the field of welding equipment technology. Background Technology

[0002] Stainless steel kitchen cabinets are widely used in the kitchenware industry due to their corrosion resistance, ease of cleaning, and high structural strength. Automatic welding equipment for stainless steel kitchen cabinets is the core equipment for realizing mass production of cabinets. It needs to take into account the welding compatibility of different cabinet specifications, while ensuring the stability and production efficiency of the welding process. It is of great significance to promoting the industrial production of stainless steel cabinets.

[0003] Although the stainless steel cabinet welding device with publication number CN212577917U can complete basic welding operations, it has obvious defects: its fixtures are mostly fixed structures or can only be adjusted in one direction. When dealing with cabinet panels of different sizes, the fixtures need to be changed frequently, and the changeover process is cumbersome and time-consuming. After welding, the cabinet needs to be manually moved, which not only increases manual intervention and limits production efficiency, but also poses a safety risk to operators coming into contact with the high-temperature cabinet.

[0004] Therefore, this invention proposes an automatic welding machine for stainless steel cabinets to compensate for and improve the deficiencies of the prior art. Summary of the Invention

[0005] In view of the deficiencies of the existing technology, the present invention provides an automatic stainless steel cabinet welding machine, which can effectively solve the related technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention discloses an automatic stainless steel cabinet welding machine, including a main unit, a welding robotic arm set on the main unit, a welding gun installed at the working end of the welding robotic arm, and a double frame spanning above the main unit, and a composite welding mechanism set on the main unit for supporting stainless steel plates. A pressing assembly installed on a twin stand and pressing the top stainless steel plate along the Z-axis. An adaptive adjustment assembly for adjusting the limit position of the composite welding mechanism, and a transfer assembly for sending each stainless steel plate away from the working area of ​​the welding robot arm. Composite welding mechanism: includes a welding table plate fixedly installed on one side of the top surface of the main unit. The welding table plate has cross-shaped longitudinal grooves. At least four limiting slot blocks are slidably embedded in the cross-shaped longitudinal grooves. The four limiting slot blocks are arranged in pairs. Each limiting slot block in the same group is fixedly provided with an extended L-shaped plate. A fastening bolt that is threaded with the limiting slot block passes through the extended L-shaped plate. A positioning clamp is rotatably connected to one end of the fastening bolt facing the center of the welding table plate. Top pressure assembly: includes an electric servo cylinder mounted on the twin upright beams, the telescopic end of the electric servo cylinder is set downward along the Z-axis and fixedly mounted with a vacuum suction cup; Adaptive adjustment assembly: includes two bidirectional lead screws that are rotatably disposed in cross-shaped longitudinal grooves along the X and Y axes respectively, one end of the bidirectional lead screws is connected to a drive unit, and a threaded nut is threaded with the bidirectional lead screws and embedded in a limiting groove block; The transfer assembly includes an electric slide rail laid on the twin upright beams, a movable slide table that slides in cooperation with the electric slide rail, and a mounting base fixedly connected to the top of the electric servo cylinder.

[0007] Preferably, the electric slide rails are mounted on two twin uprights along the X-axis.

[0008] Preferably, the welding table is horizontally arranged on the table surface of the main unit, and the cross-shaped longitudinal groove includes a first through groove extending along the X-axis direction and a second through groove extending along the Y-axis direction and perpendicularly intersecting the first through groove.

[0009] Preferably, the four limiting slot blocks are slidably embedded at both ends of the first through slot and in the second through slot.

[0010] Preferably, the extended L-shaped plate comprises a horizontal plate portion fixedly connected to the limiting groove block, and a vertical plate portion extending perpendicular to the welding platform direction, with fastening bolts threadedly connected to the vertical plate portion.

[0011] Preferably, the side of the positioning clamp facing the stainless steel plate is provided with an anti-slip pad.

[0012] Preferably, the drive unit is a manual crank, which consists of an outer handle and a connecting rod integrally connected to the handle. The connecting rod passes through the welding plate and is fixedly connected to the corresponding bidirectional lead screw.

[0013] Preferably, the drive unit is a servo motor, and the output shaft of the servo motor is connected to one end of the bidirectional lead screw via a coupling.

[0014] Preferably, the movable slide table and the outer wall of the cylinder of the electric servo cylinder are fixedly connected by a connector, and the electric servo cylinder slides along the X-axis with the movable slide table.

[0015] Preferably, the welding robotic arm is a multi-degree-of-freedom industrial robotic arm, and the base of the welding robotic arm is fixedly installed on the table of the main unit.

[0016] Compared with the known prior art, the technical solution provided by this invention has the following beneficial effects: This automatic welding device for stainless steel kitchen cabinets, through the cooperation of a composite welding mechanism and an adaptive adjustment component, can achieve the positioning of stainless steel cabinets of various specifications. The cross-shaped longitudinal groove of the composite welding mechanism provides sliding space in both the X and Y directions for the limiting slot block. The bidirectional lead screw of the adaptive adjustment component rotates under the drive of the drive unit, and moves the limiting slot block through the embedded lead nut, thereby adjusting the position of the positioning clamp. Whether it is adjusted by hand crank in small batch production or by automatic adjustment by servo motor in large batch production, it can adapt to cabinet panels of different sizes without changing the fixture, which greatly reduces changeover time and improves the welding production capacity of stainless steel cabinets. The transfer component and the top-pressing component work together to realize the automatic transfer of the cabinet after welding. The electric slide rail of the transfer component drives the moving slide to slide. After welding is completed, it can drive the top-pressing component and the welded cabinet away from the working area of ​​the welding robot arm along the X-axis. In this way, manual handling is not required, reducing human intervention and increasing single-shift productivity. At the same time, it avoids the safety risks that may be caused by human contact with high-temperature cabinets and improves the workshop working environment. The drive unit offers two options: a manual crank and a servo motor, allowing for flexible adaptation to different production scenarios. For small batches requiring rapid debugging, the manual crank offers ease of operation; for large-scale production demanding automation, the servo motor enables precise automatic adjustment, enhancing the device's adaptability to different production scales. An anti-slip pad can be installed on the side of the positioning clamp that contacts the stainless steel plate. This increases the clamping friction, prevents the plate from shifting during welding, and further improves the positioning accuracy. Attached Figure Description

[0017] Figure 1 This is a front-view perspective view of the present invention. Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective; Figure 3 This is a partial three-dimensional structural diagram of the relevant components at the cross-shaped longitudinal groove in this invention; Figure 4 For the present invention Figure 3 A magnified 3D structural diagram of a portion of point A in the middle; Figure 5 This is a partial three-dimensional structural diagram of the relevant components at the limiting groove block in this invention; Figure 6 This is a partial three-dimensional structural diagram of the relevant components at the bidirectional lead screw in this invention; Figure 7 This is a partial three-dimensional structural diagram of the relevant components at the moving component in this invention; Figure 8 This is another perspective view of the relevant components at the moving component in this invention; Figure 9This is a schematic diagram of the movement state of the transfer component in this invention.

[0018] The labels in the diagram represent: 1. Main unit; 11. Welding robotic arm; 12. Welding torch; 13. Stainless steel plate; 14. Twin support frame; Composite welding mechanism: 21. Welding table; 22. Cross-shaped longitudinal groove; 23. Limiting groove block; 24. Extending L-shaped plate; 25. Fastening bolt; 26. Positioning clamp; Top pressure components: 27. Electric servo cylinder; 28. Vacuum suction cup; Adaptive adjustment components: 31. Bidirectional lead screw; 32. Drive unit; 33. Embedded lead screw nut; Transfer components: 41. Electric slide rail; 42. Moving slide table. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example 1:

[0021] like Figures 1 to 5 As shown, an automatic stainless steel cabinet welding machine includes a main unit 1, on which a welding robotic arm 11 is fixedly mounted, and a welding torch 12 is mounted on the working end of the welding robotic arm 11. Specifically, the welding robotic arm 11 is a multi-degree-of-freedom industrial robotic arm, and the base of the welding robotic arm 11 is fixedly mounted on the table of the main unit 1. Note: The welding robotic arm 11 and the welding torch 12 are both existing known technologies, so their detailed principles and structural features are not described in detail. It also includes a twin stand 14 spanning above the main unit 1, a composite welding mechanism for supporting and positioning the stainless steel plate 13, and a pressing assembly for pressing and holding the top stainless steel plate 13 along the Z-axis.

[0022] The composite welding mechanism includes a welding table 21 fixed on one side of the top surface of the main unit 1. The welding table 21 is arranged horizontally and has a cross-shaped longitudinal groove 22. Specifically, the welding table 21 is horizontally set on the table surface of the main unit 1. The cross-shaped longitudinal groove 22 includes a first through groove extending along the X-axis direction and a second through groove extending along the Y-axis direction and perpendicularly intersecting the first through groove.

[0023] At least four limiting slot blocks 23 are slidably embedded in the cross-shaped longitudinal groove 22. The four limiting slot blocks 23 are respectively slidably embedded at both ends of the first through groove and in the second through groove. The limiting slot blocks 23 and the cross-shaped longitudinal groove 22 are fitted with clearance, and the bottom of the limiting slot blocks 23 is provided with a guide protrusion that fits against the bottom of the through groove to ensure that there is no left or right displacement during sliding. The four limiting slot blocks 23 are grouped in pairs. Each limiting slot block 23 in the same group is fixed with an extended L-shaped plate 24. A fastening bolt 25 that is threadedly engaged with the limiting slot block 23 passes through the extended L-shaped plate 24. The extended L-shaped plate 24 consists of a horizontal plate portion that is fixedly connected to the limiting slot block 23 and a vertical plate portion that extends perpendicular to the direction of the welding platform 21. The fastening bolt 25 is threadedly connected to the vertical plate portion. The end of the fastening bolt 25 facing the center of the welding plate 21 is rotatably connected to the positioning clamp 26. The rotatable connection is achieved through a deep groove ball bearing. The inner ring of the bearing is interference-fitted with the end of the fastening bolt 25, and the outer ring of the bearing is transition-fitted with the mounting groove preset on the back of the positioning clamp 26. A dust cover is provided on the outside of the bearing to prevent welding spatter from entering the bearing and affecting the rotation flexibility.

[0024] By rotating the fastening bolt 25, the positioning clamp 26 can be pushed closer to or further away from the stainless steel plate 13, thereby clamping cabinet panels of different sizes. The rotating connection can prevent the positioning clamp 26 from rotating with the bolt, ensuring clamping stability.

[0025] The top pressure assembly includes an electric servo cylinder 27 mounted on the crossbeam of the twin uprights 14. The telescopic end of the electric servo cylinder 27 extends downward along the Z-axis, and a vacuum suction cup 28 is fixed at the end. The vacuum suction cup 28 is threadedly connected to the telescopic end of the electric servo cylinder 27 through a connector with external threads, which facilitates the replacement of suction cups of different diameters according to the size of the top stainless steel plate 13. A vacuum filter is connected in series on the air pipe between the suction cup and the external vacuum generator to prevent impurities in the air from entering the suction cup and affecting the adsorption effect. The electric servo cylinder 27 can control the extension stroke and top pressure through an external controller. Note: The control logic is a known technology and will not be described in detail. The vacuum suction cup 28 uses a flexible method to adsorb and press the top stainless steel plate 13, which eliminates the gaps between the plates and avoids hard contact that could damage the stainless steel surface.

[0026] Furthermore, the side of the positioning clamp 26 facing the stainless steel plate 13 is provided with an anti-slip pad. The anti-slip pad is made of silicone rubber that is resistant to high welding temperatures and has a diamond-shaped anti-slip texture pressed on its surface. This not only increases the friction with the stainless steel plate 13, but also provides cushioning protection for the plate surface when clamped.

[0027] In use: First, place each stainless steel plate 13 on the welding table 21. Then, use the fastening bolts 25 to drive the positioning clamp 26 to clamp the middle of the bottom edge of the plate and position it. Then, the electric servo cylinder 27 drives the vacuum suction cup 28 to move down, adsorb and press the top stainless steel plate 13, so that each plate fits tightly. Finally, the welding robot arm 11 drives the welding gun 12 to weld the weld seam.

[0028] Example 2:

[0029] like Figure 6 As shown, the aforementioned automatic stainless steel cabinet welding machine also includes an adaptive adjustment component for adjusting the limit position of the composite welding mechanism.

[0030] The adaptive adjustment assembly includes two bidirectional lead screws 31 that are rotatably installed in the cross-shaped longitudinal groove 22 along the X and Y axes, respectively. The two ends of the bidirectional lead screws 31 are rotatably connected to the welding table 21 through deep groove ball bearing seats. The bearing seats are embedded in the inner wall of the groove end of the cross-shaped longitudinal groove 22, and the bearing seats are provided with end caps on the outside to prevent welding spatter from entering the bearings and affecting the rotation accuracy. One end of the bidirectional lead screw 31 is connected to the drive unit 32, and a lead screw nut 33 is threadedly fitted on the bidirectional lead screw 31. The lead screw nut 33 is fixedly connected to the limiting groove block 23. Specifically, the drive unit 32 is a manual crank, which includes an outer handle with an anti-slip rubber sleeve on the outer surface of the handle to increase grip friction and facilitate the operator to rotate it; and a connecting rod integrally connected to the handle. The connecting rod passes through the welding plate 21 and is fixedly connected to the corresponding bidirectional lead screw 31. As another optional implementation, the drive unit 32 is a servo motor (note: it is not shown in the figure for ease of structural illustration). The output shaft of the servo motor is connected to one end of the bidirectional lead screw 31 via a coupling.

[0031] When the drive unit 32 drives the bidirectional lead screw 31 to rotate, the embedded lead screw nut 33 moves along the lead screw axis, thereby driving the limiting groove block 23 to slide in the cross-shaped longitudinal groove 22, realizing the position adjustment of the positioning clamp 26 in the X and Y directions, adapting to the positioning requirements of different cabinet specifications.

[0032] In use: Before welding the stainless steel cabinet, select cabinet panels of different sizes according to the size of the cabinet to be welded. Adjust the position of the limit slot block 23 and the positioning clamping plate 26 by rotating the automatic or manual bidirectional screw 31 of the drive unit 32. Then, clamp the plates, press them down and weld them according to the steps of the above embodiment 1, so that the device can quickly adapt to cabinets of multiple specifications without changing the clamps.

[0033] Example 3:

[0034] like Figures 7 to 9As shown, the aforementioned automatic stainless steel cabinet welding machine also includes a transfer component for moving the stainless steel cabinet away from the welding operation area.

[0035] The transfer assembly includes an electric slide rail 41 mounted on the twin supports 14 along the X-axis direction, the electric slide rail 41 being mounted on the two twin supports 14 along the X-axis direction.

[0036] Specifically, the electric slide rail 41 is fixed to the twin uprights 14 by T-bolts. The twin uprights 14 have pre-set positioning grooves that match the bolts to ensure that the slide rail is accurately aligned along the X-axis during installation. The slide rail is also equipped with a metal protective cover to prevent welding spatter and fumes from falling into the slide rail and affecting its sliding performance. Note: The metal protective cover is not shown for ease of structural demonstration.

[0037] The movable slide table 42 is slidably engaged with the electric slide rail 41. The movable slide table 42 is fixedly connected to the top mounting seat of the electric servo cylinder 27. The electric slide rail 41 can drive the movable slide table 42 to slide along the X-axis, thereby driving the top pressing component and the positioned and top-pressed stainless steel cabinet to move, realizing "automatic transfer after welding", replacing manual handling, and improving production efficiency and safety.

[0038] Furthermore, limit switches are provided at both ends of the electric slide rail 41. The limit switches are fixed on the crossbeam of the twin uprights 14 by brackets. When the moving slide 42 slides to the end of the stroke, the slide triggers the limit switch, and the electric slide rail 41 automatically stops running to avoid the slide over-travel collision that could damage the components.

[0039] In use: After welding is completed, the electric slide rail 41 is started, which drives the moving slide table 42, the electric servo cylinder 27 and the welded stainless steel cabinet to slide along the X-axis, sending the cabinet away from the working area of ​​the welding robot arm 11, so as to facilitate subsequent material unloading or process flow; after the material unloading is completed, the moving slide table 42 can slide back to prepare for the welding operation of the next set of cabinets.

[0040] 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 spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic stainless steel cabinet welding machine, comprising a main unit (1), a welding robotic arm (11) mounted on the main unit (1), wherein a welding torch (12) is mounted on the working end of the welding robotic arm (11), characterized in that, It also includes a twin support frame (14) spanning above the main unit (1), and a composite welding mechanism set on the main unit (1) and used to support the stainless steel plate (13); A pressing assembly installed on the twin stand (14) and pressing the top stainless steel plate (13) along the Z-axis direction; An adaptive adjustment assembly for adjusting the limiting position of the composite welding mechanism, and a transfer assembly for sending each stainless steel plate (13) away from the working area of ​​the welding robot arm (11). Composite welding mechanism: includes a welding table (21) fixedly installed on one side of the top surface of the main unit (1). The welding table (21) is provided with a cross-shaped longitudinal groove (22). At least four limiting slot blocks (23) are slidably embedded in the cross-shaped longitudinal groove (22). The four limiting slot blocks (23) are arranged in pairs. Each limiting slot block (23) in the same group is fixedly provided with an extended L-shaped plate (24). The extended L-shaped plate (24) is provided with a fastening bolt (25) that is threaded with the limiting slot block (23). The end of the fastening bolt (25) facing the center of the welding table (21) is rotatably connected to a positioning clamp (26). Top pressure assembly: includes an electric servo cylinder (27) installed on the crossbeam of the twin uprights (14), the telescopic end of the electric servo cylinder (27) is set downward along the Z-axis and a vacuum suction cup (28) is fixedly installed. Adaptive adjustment assembly: includes two bidirectional lead screws (31) that are rotatably disposed in the cross-shaped longitudinal groove (22) along the X and Y axes respectively, one end of the bidirectional lead screw (31) is connected to a drive unit (32), and a nut (33) that is threadedly engaged with the bidirectional lead screw (31) and embedded in the limiting groove (23). The transfer assembly includes an electric slide rail (41) laid on the crossbeam of the twin uprights (14), a movable slide (42) that slides in cooperation with the electric slide rail (41), and the movable slide (42) being fixedly connected to the mounting base on the top of the electric servo cylinder (27).

2. The automatic stainless steel cabinet welding machine according to claim 1, characterized in that, The electric slide rail (41) is mounted on two twin uprights (14) along the X-axis.

3. The automatic stainless steel cabinet welding machine according to claim 1, characterized in that, The welding table (21) is horizontally set on the table surface of the main unit (1). The cross-shaped longitudinal groove (22) includes a first through groove extending along the X-axis direction and a second through groove extending along the Y-axis direction and perpendicularly intersecting the first through groove.

4. The automatic stainless steel cabinet welding machine according to claim 3, characterized in that, Four limiting slot blocks (23) are respectively slidably embedded at both ends of the first through slot and in the second through slot.

5. The automatic stainless steel cabinet welding machine according to claim 1, characterized in that, The extended L-shaped plate (24) consists of a horizontal plate portion fixedly connected to the limiting groove block (23) and a vertical plate portion extending perpendicular to the welding platform (21), with a fastening bolt (25) threaded onto the vertical plate portion.

6. The automatic stainless steel cabinet welding machine according to claim 1, characterized in that, The positioning clamp (26) has an anti-slip pad on the side facing the stainless steel plate (13).

7. The automatic stainless steel cabinet welding machine according to claim 1, characterized in that, The drive unit (32) is a manual crank, which consists of an outer crank handle and a connecting rod integrally connected to the crank handle. The connecting rod passes through the welding plate (21) and is fixedly connected to the corresponding bidirectional lead screw (31).

8. The automatic stainless steel cabinet welding machine according to claim 1 or 7, characterized in that, The drive unit (32) is a servo motor, and the output shaft of the servo motor is connected to one end of the bidirectional lead screw (31) via a coupling.

9. The automatic stainless steel cabinet welding machine according to claim 1, characterized in that, The movable slide (42) and the outer wall of the cylinder of the electric servo cylinder (27) are fixedly connected by a connector, and the electric servo cylinder (27) slides along the X-axis with the movable slide (42).

10. The automatic stainless steel cabinet welding machine according to claim 1, characterized in that, The welding robotic arm (11) is a multi-degree-of-freedom industrial robotic arm, and the base of the welding robotic arm (11) is fixedly installed on the table of the main unit (1).

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