Automatic welding device and welding method for electric iron accessories

Abstract

The invention discloses an automatic welding device and method for an electric iron accessory. The device comprises a main body unit, a hoop supporting and limiting unit, a first centering adjusting unit, a second centering adjusting unit and a pressing and fixing unit. The main body unit comprises a working rack, a gantry support fixedly connected with the upper surface of the working rack, a pair of positioning columns fixedly connected with the upper surface of the working rack, a cross arm connected with the positioning columns in an inserted mode and a hoop placed at the top of the cross arm, and the hoop supporting and limiting units are arranged at the left end and the right end of the cross arm and used for longitudinally limiting lug plates on the two sides of the hoop. The first centering adjusting unit is arranged on the arc-shaped inner side of the hoop and used for roughly adjusting the centering position of the hoop, the second centering adjusting unit is arranged on the arc-shaped inner side of the hoop and used for finely adjusting the centering position of the hoop, and the pressing and fixing unit is used for pressing and fixing lug plates on the two sides of the hoop in the vertical direction. The hoop and the middle of the cross arm can be accurately aligned and welded, and the welding firmness and the stability of the overall structure are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, and in particular to an automatic welding device and a welding method for electric iron accessories. Background Art

[0002] In the construction process of power facilities, the welding connection between crossarms and clamps is a crucial task. As the key supporting structure of overhead transmission lines, the stability of crossarms is directly related to the safety and reliability of the entire power facility. Clamps are important devices used to firmly fix cables, insulators or other power accessories on crossarms.

[0003] When welding the crossarm and the clamp, it is crucial to accurately align the arc surface at the bottom of the clamp with the center of the top of the crossarm, which is directly related to the firmness of the welding and the stability of the overall structure. However, in actual operation, the operator often relies on the naked eye and experience to judge the position and angle of the clamp. This method is not only inefficient, but also difficult to ensure the accuracy of the centering process, often resulting in the displacement of the clamp welding position, which in turn affects the overall stability of the crossarm. This instability is likely to increase the risk of the crossarm tilting, deformation or falling off under severe weather conditions such as strong winds and heavy rains. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic welding device for electric iron accessories, mainly comprising:

[0006] The main unit includes a workbench, a gantry bracket fixedly connected to the upper surface of the workbench, a pair of positioning columns fixedly connected to the upper surface of the workbench, a cross arm adapted to be plugged into the positioning columns, and a clamp placed on the top of the cross arm;

[0007] The clamp support limiting unit is symmetrically and spaced apart at the left and right ends of the cross arm, and the bottom is connected to the upper surface of the workbench, and is used for longitudinally limiting and supporting the ear plates on both sides of the clamp;

[0008] A first centering adjustment unit, which is arranged on the inner side of the arc of the clamp and connected to the gantry bracket, and is used to push the clamp to move and roughly adjust the centering position of the clamp;

[0009] A second centering adjustment unit, which is arranged on the inner side of the arc of the clamp and connected to the first centering adjustment unit, and is used for fine-tuning the centering position of the clamp;

[0010] The pressing and fixing unit is symmetrically arranged above the clamp and connected to the first centering adjustment unit and the second centering adjustment unit, and is used for pressing and fixing the ear plates on both sides of the clamp in the vertical direction.

[0011] As a preferred solution of the automatic welding device for electric iron accessories described in the present invention, the clamp support limiting unit includes a bracket plate fixedly connected to the upper surface of the workbench, the top of the bracket plate is provided with a longitudinal limiting groove adapted to the width of the clamp, and the inner bottom wall of the longitudinal limiting groove is laterally fixed with a support plate for supporting the ear plates on both sides of the clamp.

[0012] As a preferred solution of the automatic welding device for electric iron accessories described in the present invention, the first centering adjustment unit includes a pair of hydraulic cylinders fixedly connected to the top of the gantry bracket, a lifting plate fixedly connected to the bottom piston end of the hydraulic cylinder, a pair of fixed rods fixedly connected to the rear bottom of the lifting plate, and a centering coarse adjustment component connected between the pair of fixed rods.

[0013] As a preferred solution of the automatic welding device for electric iron accessories of the present invention, the centering coarse adjustment component includes a motor mounting seat fixedly connected between a pair of fixed rods, a rotating motor fixedly connected to the motor mounting seat, a first rotating shaft fixedly connected to the output end of the rotating motor, a pair of first eccentric wheels fixedly and sleeved at intervals on the outside of the first rotating shaft, a first gear located between the pair of first eccentric wheels, and a positioning plate fixedly connected to the bottom of the motor mounting seat, the first gear is fixedly sleeved on the outside of the first rotating shaft, the first gear is connected to the second centering adjustment unit, and the pair of first eccentric wheels are located at a position slightly below the inner side of the arc of the hoop;

[0014] During the rotation of the first eccentric wheel, the side of the first eccentric wheel forms rolling contact with the inner arc surface of the clamp. When the first eccentric wheel rotates to a specific angle, the clamp moves to the center of the top of the cross arm, and the connecting line between the tangent point and the axis of the first eccentric wheel is perpendicular to the inner arc surface of the clamp.

[0015] As a preferred solution of the automatic welding device for electric iron accessories described in the present invention, wherein: the second centering adjustment unit includes a pair of symmetrically arranged centering fine-adjustment components and a fine-adjustment drive component, the pair of centering fine-adjustment components are both located below the lifting plate and connected to the bottom of the lifting plate, and the fine-adjustment drive component is connected to the lifting plate, a pair of centering fine-adjustment components and a pressing and fixing unit.

[0016] As a preferred solution of the automatic welding device for electric iron accessories of the present invention, the centering fine adjustment component includes a connecting plate fixedly connected to the bottom of the lifting plate, a second rotating shaft rotatably connected to the front side of the connecting plate, a pair of second eccentric wheels fixedly sleeved on the outside of the second rotating shaft, and a second gear located between the pair of second eccentric wheels, the second gear is fixedly sleeved on the outside of the second rotating shaft and connected to the fine adjustment drive component, and the pair of second eccentric wheels are located at a position slightly above the inner arc of the hoop;

[0017] When the second gear and the second eccentric wheel are driven to rotate by the fine-tuning driving assembly, the side of the second eccentric wheel forms rolling contact with the inner arc surface of the clamp. When the second eccentric wheel rotates to a specific angle, the clamp moves to the top center of the cross arm, and the connecting line between the tangent point and the axis of the second eccentric wheel is perpendicular to the inner arc surface of the clamp.

[0018] As a preferred solution of the automatic welding device for electric iron accessories of the present invention, the fine adjustment drive assembly includes a sliding rod that slides through the lifting plate, a pair of support rods are symmetrically fixed to the bottom of both sides of the sliding rod, the pair of support rods are in an "eight" shape, and the ends of the pair of support rods away from the sliding rods are vertically fixed with double-sided racks, and the sides of the pair of double-sided racks away from each other are respectively meshed and connected with the sides opposite to the pair of second gears, and the other side of the double-sided racks is connected to the pressing and fixing unit;

[0019] The bottom end of the slide bar is fixedly connected with a single-sided rack, and the single-sided rack is meshedly connected with the first gear.

[0020] As a preferred solution of the automatic welding device for electric iron accessories described in the present invention, the pressing and fixing unit includes a third rotating shaft rotatably connected to the front side of the connecting plate, a third gear is fixedly sleeved on the third rotating shaft, the third gear is meshingly connected to the side of the double-sided rack away from the second gear, an inclined plate is obliquely fixedly connected to the third rotating shaft, a pressing plate is laterally fixedly connected to the lower end of the inclined plate, the pressing plate is adapted to the longitudinal limiting groove, and the pressing plate rotates and presses against the top of the ear plates on both sides of the hoop while the hoop is centered.

[0021] As a preferred solution of the automatic welding device for electric iron accessories of the present invention, wherein: the inclined plate is provided with an avoidance groove connected up and down, and the double-sided rack movably penetrates the avoidance groove.

[0022] The welding method using the above automatic welding device for electric iron accessories comprises the following steps:

[0023] Step 1: Prepare the automatic spot welding machine before welding and place it in front of the workbench. Then, set the corresponding welding parameters according to the welding requirements.

[0024] Step 2: Assembling and positioning. First, the lifting plate is driven to rise by operating the hydraulic cylinder, and the lifting plate drives the first eccentric wheel, the second eccentric wheel and the pressing and fixing unit to rise synchronously, so as to make enough space for placing the clamp; then, the cross arm to be welded is plugged into the positioning column through the mounting holes at both ends thereof to realize the positioning of the cross arm; then, the clamp to be welded is placed on the positioned cross arm, and it is ensured that the ear plates on both sides of the clamp (105) are engaged in the longitudinal limiting grooves, and the clamp is supported by the support plate, so as to accurately position the clamp in the longitudinal direction;

[0025] Step 3: Centering processing, start the hydraulic cylinder, and its piston end drives the lifting plate to move downward. The lifting plate drives the centering coarse adjustment component, the centering fine adjustment component and the pressing and fixing unit to move downward synchronously through the fixing rod and the connecting plate until the positioning plate is tightly fitted with the upper surface of the workbench. At this time, the positioning plate plays a positioning role and can quickly determine the accurate positions of the first eccentric wheel and the second eccentric wheel;

[0026] Next, the rotating motor is started, and its output end drives the first rotating shaft to rotate clockwise, thereby driving the first eccentric wheel and the first gear to rotate clockwise. When the first eccentric wheel rotates to a specific angle, it pushes the clamp to move to the top center position of the cross arm, completing the rough centering adjustment of the clamp. At this time, the rotating motor is turned off;

[0027] When the first gear rotates clockwise, it also drives the single-sided rack bonded to it to move downward, and the single-sided rack drives a pair of double-sided racks to move downward at the same time through the sliding rod and the supporting rod, and the pair of double-sided racks respectively drive a pair of second gears meshing with it to rotate counterclockwise and clockwise. When the first eccentric wheel rotates to a specific angle, the second eccentric wheel also rotates to a corresponding angle, and the centering position of the clamp is further fine-tuned through the pushing action of the second eccentric wheel;

[0028] Step 4: Press and fix. When the double-sided rack moves downward, a pair of third gears meshing with it are driven to rotate counterclockwise and clockwise respectively. The third gear drives the pressing plate to rotate toward the bracket plate through the inclined plate. When the centering adjustment of the clamp is completed, the pressing plate is pressed against the top of the ear plates on both sides of the clamp at the same time to achieve a stable pressing and fixing of the clamp.

[0029] Step 5: Prepare for welding. Set the automatic welding route according to the weld position of the clamp and the cross arm. Then, start the welding machine and perform electric welding on the weld position according to the set route.

[0030] Beneficial effects of the present invention:

[0031] 1. In the present invention, the centering position of the clamp can be roughly adjusted by the rotation of the first eccentric wheel. At the same time, through the meshing action of the single-sided rack and the first gear and the meshing action of the double-sided rack and the second gear, the centering position of the clamp can be further fine-tuned by the second eccentric wheel while the rough adjustment is being performed, so that the clamp can be accurately aligned with the middle of the cross arm, ensuring the firmness of the welding and the stability of the overall structure. In addition, this method can also effectively avoid the problem of welding position deviation, thereby reducing the risk of cross arm tilting, deformation or falling off due to poor welding.

[0032] 2. In the present invention, the lifting action of the double-sided gear can also drive the rotation of the third gear at the same time. The third gear drives the pressing plate to rotate through the inclined plate. When the centering adjustment of the clamp is completed, the pressing plate can be rotated to press against the top of the ear plates on both sides of the clamp, which can improve the stability of the clamp during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0034] Figure 1 The present invention is a schematic diagram of the overall structure of an automatic welding device for electric iron accessories for centering and adjusting a clamp.

[0035] Figure 2 The figure is a schematic diagram of the overall structure of an automatic welding device for electric iron accessories of the present invention in an initial state.

[0036] Figure 3 The present invention is a schematic structural diagram of a clamp support limiting unit of an automatic welding device for electric iron accessories.

[0037] Figure 4 for Figure 1 Schematic diagram of the local enlarged structure.

[0038] Figure 5 for Figure 2 Schematic diagram of the local enlarged structure.

[0039] Figure 6 The present invention is a schematic structural diagram of a first centering adjustment unit of an automatic welding device for electric iron accessories.

[0040] Figure 7 The present invention is a schematic structural diagram of a second centering adjustment unit of an automatic welding device for electric iron accessories.

[0041] Figure 8 The present invention is a schematic diagram of the partially connected enlarged structure of a first centering adjustment unit, a second centering adjustment unit and a pressing and fixing unit of an automatic welding device for electric iron accessories.

[0042] Fig. 9 The present invention is a schematic structural diagram of a pressing and fixing unit of an automatic welding device for electric iron accessories.

[0043] In the figure: 100, main unit; 101, workbench; 102, gantry bracket; 103, positioning column; 104, cross arm; 105, clamp; 200, clamp support limit unit; 201, bracket plate; 202, longitudinal limit groove; 203, support plate; 300, first centering adjustment unit; 301, hydraulic cylinder; 302, lifting plate; 303, fixing rod; 304, centering coarse adjustment assembly; 304-1, motor mounting seat; 304-2, rotating motor; 304-3, first rotating shaft; 304-4, first gear; 304- 5. Positioning plate; 304-6. First eccentric wheel; 400. Second centering adjustment unit; 401. Centering fine-tuning assembly; 401-1. Connecting plate; 401-2. Second rotating shaft; 401-3. Second eccentric wheel; 401-4. Second gear; 402. Fine-tuning drive assembly; 402-1. Sliding rod; 402-2. Support rod; 402-3. Double-sided rack; 402-4. Single-sided rack; 500. Pressing and fixing unit; 501. Third rotating shaft; 502. Third gear; 503. Inclined plate; 504. Pressing plate; 505. Avoidance groove. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0047] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0048] Example 1

[0049] Reference Figure 1-8 , which is the first embodiment of the present invention, provides an automatic welding device for electric iron accessories, mainly comprising:

[0050] The main unit 100, such as Figure 1 The main unit 100 includes a workbench 101, a gantry bracket 102 fixedly connected to the upper surface of the workbench 101 by bolts, a pair of positioning columns 103 fixedly connected to the upper surface of the workbench 101, a cross arm 104 adapted to be plugged with the positioning column 103, and a clamp 105 placed on the top of the cross arm 104. When placing the clamp 105, the arc end of the bottom of the clamp 105 is placed on the top of the cross arm 104, and the ear plates on both sides of the clamp 105 are placed in the longitudinal limiting groove 202, and the bottom of the ear plate is fitted with the support plate 203.

[0051] The clamp support limiting unit 200 is symmetrically and spaced apart at the left and right ends of the cross arm 104 , and the bottom is connected to the upper surface of the workbench 101 , and is used to longitudinally limit and support the ear plates on both sides of the clamp 105 .

[0052] Specifically, Figure 3 The clamp support limiting unit 200 includes a bracket plate 201 fixedly connected to the upper surface of the workbench 101 by bolts, and a longitudinal limiting groove 202 adapted to the width of the clamp 105 is opened on the top of the bracket plate 201. A support plate 203 for supporting the ear plates on both sides of the clamp 105 is transversely fixed to the inner bottom wall of the longitudinal limiting groove 202. The clamp 105 can be positioned in the longitudinal direction through the adaptation of the longitudinal limiting groove 202 and the ear plates of the clamp 105.

[0053] The first centering adjustment unit 300 is disposed on the inner side of the arc of the clamp 105 and connected to the gantry bracket 102 , and is used to push the clamp 105 to move and roughly adjust the centering position of the clamp 105 .

[0054] Specifically, Figure 6The first centering adjustment unit 300 includes a pair of hydraulic cylinders 301 fixedly connected to the top of the gantry bracket 102, a lifting plate 302 fixedly connected to the bottom piston end of the hydraulic cylinder 301, a pair of fixed rods 303 fixedly connected to the rear bottom of the lifting plate 302, and a centering coarse adjustment component 304 connected between the pair of fixed rods 303.

[0055] Further, such as Figure 6 The centering coarse adjustment component 304 includes a motor mounting seat 304-1 fixedly connected between a pair of fixed rods 303, a rotating motor 304-2 fixedly connected to the motor mounting seat 304-1 by bolts, a first rotating shaft 304-3 fixedly connected to the output end of the rotating motor 304-2, a pair of first eccentric wheels 304-6 fixedly and spaced apart on the outside of the first rotating shaft 304-3, a first gear 304-4 located between the pair of eccentric wheels 304-3, and a positioning plate 304-5 fixedly connected to the bottom of the motor mounting seat 304-1. When in use, a pressure sensor can be embedded in the bottom of the positioning plate 304-5. When the positioning plate 304-5 contacts the top of the workbench 101, the pressure sensor generates pressure and transmits it to the control. The controller controls the hydraulic cylinder 301 to no longer drive the lifting plate 302 to move downward, thereby accurately determining the positions of the first eccentric wheel 304-6 and the second eccentric wheel 401-3. The first gear 304-4 is fixedly sleeved on the outside of the first rotating shaft 304-3, and the first gear 304-4 is connected to the second centering adjustment unit 400. A pair of first eccentric wheels 304-6 are located at a position slightly lower than the inner side of the arc of the clamp 105. In addition, the center of the axial hole of the first eccentric wheel 304-6 is located on the horizontal center line of the clamp 105. In this way, when the first eccentric wheel 304-6 rotates, it is not easy to generate an upward thrust on the clamp 105, but it will apply a left and right thrust to the clamp 105. In the initial state, the side farthest from the axis is vertically upward. When the top end of the first eccentric wheel 304-6 rotates from vertically upward to vertically downward, the centering position of the clamp 105 can be roughly adjusted.

[0056] During the rotation of the first eccentric wheel 304-6, the side of the first eccentric wheel 304-6 forms a rolling contact with the inner arc surface of the clamp 105. When the first eccentric wheel 304-6 rotates to a specific angle (that is, the side farthest from the axis is vertically downward and tangent to the bottom of the inner arc of the clamp 105), the clamp 105 moves to the top center of the cross arm 104, and the tangent point and the axis connection line of the first eccentric wheel 304-6 are perpendicular to the inner arc surface of the clamp 105.

[0057] The second centering adjustment unit 400 is disposed on the inner side of the arc of the clamp 105 and is connected to the first centering adjustment unit 300 for fine-tuning the centering position of the clamp 105 .

[0058] Specifically, Figure 7The second centering adjustment unit 400 includes a pair of symmetrically arranged centering fine-adjustment components 401 and a fine-adjustment drive component 402. The pair of centering fine-adjustment components 401 are both located below the lifting plate 302 and connected to the bottom of the lifting plate 302. The fine-adjustment drive component 402 is connected to the lifting plate 302, the pair of centering fine-adjustment components 401 and the pressing and fixing unit 500.

[0059] Further, such as Figure 7 The centering fine-tuning assembly 401 includes a connecting plate 401-1 fixedly connected to the bottom of the lifting plate 302 by bolts, a second rotating shaft 401-2 rotatably connected to the front side of the connecting plate 401-1 by a bearing, a pair of second eccentric wheels 401-3 fixedly sleeved on the outside of the second rotating shaft 401-2, and a second gear 401-4 located between the pair of second eccentric wheels 401-3. The second gear 401-4 is fixedly sleeved on the outside of the second rotating shaft 401-2 and connected to the fine-tuning drive assembly 402. The pair of second eccentric wheels 401-3 are located at a position slightly above the inner arc of the clamp 105. When in use, the direction of the rotation of the pair of second eccentric wheels 401-3 generates a correction force in the left and right directions on the clamp 105.

[0060] like Figure 4 When the second gear 401-4 and the second eccentric wheel 401-3 are driven to rotate by the fine-tuning driving assembly 402, the side of the second eccentric wheel 401-3 forms a rolling contact with the inner arc surface of the clamp 105. When the second eccentric wheel 401-3 rotates to a specific angle (that is, the connecting line between the tangent point and the axis of the second eccentric wheel 401-3 is perpendicular to the inner arc surface of the clamp 105), the clamp 105 moves to the top center of the cross arm 104.

[0061] Further, such as Figure 7 The fine-tuning drive assembly 402 includes a slide bar 402-1 that slides through the lifting plate 302, and a pair of support rods 402-2 are symmetrically fixed to the bottom of both sides of the slide bar 402-1. The pair of support rods 402-2 are in an "eight" shape, and the ends of the pair of support rods 402-2 away from the slide bar 402-1 are vertically fixed with double-sided racks 402-3, and the sides of the pair of double-sided racks 402-3 away from each other are respectively meshed and connected with the opposite sides of a pair of second gears 401-4, and the other side of the double-sided racks 402-3 is connected to the pressing and fixing unit 500; a single-sided rack 402-4 is fixedly connected to the bottom end of the slide bar 402-1, and the single-sided rack 402-4 is meshed and connected with the first gear 304-4.

[0062] In summary, when the hoop 105 is centered, the lifting plate 302 is driven to rise by operating the hydraulic cylinder 301, and the lifting plate 302 drives the first eccentric wheel 304-6, the second eccentric wheel 401-3 and the pressing and fixing unit 500 to rise synchronously, so as to make enough space for placing the hoop 105; after the hoop 105 and the cross arm 104 are positioned and placed, the hydraulic cylinder 301 is started, and its piston end drives the lifting plate 302 to move downward, and the lifting plate 302 drives the fixing rod 303 and the connecting plate 401-1 to move the lifting plate 302 downward. The coarse adjustment component 304, the centering fine adjustment component 401 and the pressing and fixing unit 500 move downward synchronously until the positioning plate 304-5 is tightly fitted with the upper surface of the workbench 101. At this time, the positioning plate 304-5 plays a positioning role and can quickly determine the accurate positions of the first eccentric wheel 304-6 and the second eccentric wheel 401-3; then, the rotating motor 304-2 is started, and its output end drives the first rotating shaft 304-3 to rotate clockwise, thereby driving the first eccentric wheel 304-6 and the second eccentric wheel 401-3. A gear 304-4 rotates clockwise. When the first eccentric wheel 304-6 rotates to a specific angle, it pushes the clamp 105 to move to the top center position of the cross arm 104, completing the rough centering adjustment of the clamp 105. At this time, the rotating motor 304-2 is turned off; while the first gear 304-4 rotates clockwise, it also drives the single-sided rack 402-4 bonded to it to move downward, and the single-sided rack 402-4 drives a pair of double-sided racks 402-4 through the slide rod 402-1 and the support rod 402-2. -3 moves downward at the same time, and the pair of double-sided racks 402-3 respectively drive the pair of second gears 401-4 meshing with them to rotate counterclockwise and clockwise. When the first eccentric wheel 304-6 rotates to a specific angle, the second eccentric wheel 401-3 also rotates to a corresponding angle. Through the driving action of the second eccentric wheel 401-3, the centering position of the clamp 105 is further fine-tuned, and the clamp 105 can be accurately aligned with the middle of the cross arm 104, ensuring the firmness of the welding and the stability of the overall structure. In addition, this method can also effectively avoid the problem of welding position deviation, thereby reducing the risk of tilting, deformation or falling off of the cross arm 104 due to poor welding.

[0063] Example 2

[0064] Reference Figure 8-9 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the device also includes a pressing and fixing unit 500, which is symmetrically arranged above the clamp 105 and is connected to the first centering adjustment unit 300 and the second centering adjustment unit 400, and is used to press and fix the ear plates on both sides of the clamp 105 in the vertical direction.

[0065] Specifically, the pressing and fixing unit 500 includes a third rotating shaft 501 rotatably connected to the front side of the connecting plate 401-1, a third gear 502 is fixedly sleeved on the third rotating shaft 501, and the third gear 502 is meshed and connected with the side of the double-sided rack 402-3 away from the second gear 401-4, and an inclined plate 503 is obliquely fixedly connected to the third rotating shaft 501, and a pressing plate 504 is transversely fixedly connected to the lower end of the inclined plate 503, and the pressing plate 504 is adapted to the longitudinal limiting groove 202, and when the clamp 105 is centered, the pressing plate 504 rotates and presses against the top of the ear plates on both sides of the clamp 105. The inclined plate 503 is provided with an avoidance groove 505 connected up and down, and the double-sided rack 402-3 is movably penetrated through the avoidance groove 505. By providing the avoidance groove 505, the double-sided rack 402-3 can be lifted and lowered without hindrance.

[0066] The remaining structures are the same as those of Example 1.

[0067] When in use, while the double-sided rack 402-3 moves downward, it also drives a pair of third gears 502 meshing with it to rotate counterclockwise and clockwise respectively. The third gear 502 drives the pressing plate 504 to rotate toward the bracket plate 201 through the inclined plate 503. When the centering adjustment of the clamp 105 is completed, the pressing plate 504 is pressed against the top of the ear plates on both sides of the clamp 105 at the same time, thereby achieving a firm pressing and fixing of the clamp 105, thereby further improving the welding quality.

[0068] The welding method using the above automatic welding device for electric iron accessories is as follows: preparation before welding, prepare the automatic spot welding machine and place it in front of the workbench 101, then set the corresponding welding parameters according to the welding requirements; assembly and positioning, first, the lifting plate 302 is driven to rise by operating the hydraulic cylinder 301, and the lifting plate 302 drives the first eccentric wheel 304-6, the second eccentric wheel 401-3 and the pressing and fixing unit 500 to rise synchronously, so as to make enough space for placing the clamp 105 (such as Figure 2); Next, the cross arm 104 to be welded is adapted and plugged into the positioning column 103 through the mounting holes at both ends thereof to realize the positioning of the cross arm 104; then the clamp 105 to be welded is placed on the positioned cross arm 104, and it is ensured that the ear plates on both sides of the clamp (105 are engaged in the longitudinal limiting groove 202, and the clamp 105 is supported by the support plate 203, so as to accurately position the clamp 105 in the longitudinal direction; for centering processing, the hydraulic cylinder 301 is started, and its piston end drives the lifting plate 302 to move downward, and the lifting plate 302 drives the centering coarse adjustment component 304, the centering fine adjustment component 401 and the press through the fixing rod 303 and the connecting plate 401-1. The pressing and fixing unit 500 moves downward synchronously until the positioning plate 304-5 is tightly fitted with the upper surface of the workbench 101. At this time, the positioning plate 304-5 plays a positioning role and can quickly determine the accurate positions of the first eccentric wheel 304-6 and the second eccentric wheel 401-3; then, the rotating motor 304-2 is started, and its output end drives the first rotating shaft 304-3 to rotate clockwise, thereby driving the first eccentric wheel 304-6 and the first gear 304-4 to rotate clockwise. When the first eccentric wheel 304-6 rotates to a specific angle, it will push the clamp 105 to move to the top center position of the cross arm 104, completing the roughening of the clamp 105 Centering adjustment, at this time, turn off the rotating motor 304-2; while the first gear 304-4 rotates clockwise, it also drives the single-sided rack 402-4 bonded to it to move downward, and the single-sided rack 402-4 drives a pair of double-sided racks 402-3 to move downward at the same time through the sliding rod 402-1 and the support rod 402-2, and the pair of double-sided racks 402-3 respectively drive a pair of second gears 401-4 meshing with it to rotate counterclockwise and clockwise, and when the first eccentric wheel 304-6 rotates to a specific angle, the second eccentric wheel 401-3 also rotates to the corresponding angle, and the pushing action of the second eccentric wheel 401-3 further fine-tunes the The centering position of the clamp 105 is pressed and fixed. During the downward movement of the double-sided rack 402-3, a pair of third gears 502 meshing with it are driven to rotate counterclockwise and clockwise respectively. The third gear 502 drives the pressing plate 504 to rotate toward the bracket plate 201 through the inclined plate 503. When the centering adjustment of the clamp 105 is completed, the pressing plate 504 is pressed against the top of the ear plates on both sides of the clamp 105 at the same time, so as to achieve a firm pressing and fixing of the clamp 105. Prepare for welding. According to the weld position of the clamp 105 and the cross arm 104, set the automatic welding route, and then start the welding machine to perform electric welding on the weld position according to the set route.

[0069] It is worth noting that the entire device is controlled by a controller. Since the controller is a commonly used device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic welding device for electric iron accessories, characterized in that: include: A main unit (100), the main unit (100) comprising a workbench (101), a gantry bracket (102) fixedly connected to the upper surface of the workbench (101), a pair of positioning columns (103) fixedly connected to the upper surface of the workbench (101), a cross arm (104) adapted to be plugged into the positioning columns (103), and a hoop (105) placed on the top of the cross arm (104); A clamp support limiting unit (200), the clamp support limiting unit (200) is symmetrically and spaced apart at the left and right ends of the cross arm (104), and the bottom is connected to the upper surface of the workbench (101), and is used to longitudinally limit and support the ear plates on both sides of the clamp (105); A first centering adjustment unit (300), the first centering adjustment unit (300) being arranged on the inner side of the arc of the clamp (105) and connected to the gantry support (102), and being used for pushing the clamp (105) to move and roughly adjusting the centering position of the clamp (105); A second centering adjustment unit (400), the second centering adjustment unit (400) being arranged on the inner side of the arc of the clamp (105) and connected to the first centering adjustment unit (300), and being used for fine-tuning the centering position of the clamp (105); A pressing and fixing unit (500) is symmetrically arranged above the clamp (105) and is connected to the first centering adjustment unit (300) and the second centering adjustment unit (400), and is used to press and fix the ear plates on both sides of the clamp (105) in a vertical direction.

2. The automatic welding device for electric iron accessories according to claim 1, characterized in that: The clamp support limiting unit (200) comprises a support plate (201) fixedly connected to the upper surface of the workbench (101), a longitudinal limiting groove (202) adapted to the width of the clamp (105) is provided on the top of the support plate (201), and a support plate (203) for supporting the ear plates on both sides of the clamp (105) is transversely fixedly connected to the inner bottom wall of the longitudinal limiting groove (202).

3. The automatic welding device for electric iron accessories according to claim 1, characterized in that: The first centering adjustment unit (300) comprises a pair of hydraulic cylinders (301) fixedly connected to the top of the gantry support (102), a lifting plate (302) fixedly connected to the bottom piston end of the hydraulic cylinder (301), a pair of fixed rods (303) fixedly connected to the rear bottom of the lifting plate (302), and a centering coarse adjustment component (304) connected between the pair of fixed rods (303).

4. The automatic welding device for electric iron accessories according to claim 3, characterized in that: The centering coarse adjustment component (304) comprises a motor mounting seat (304-1) fixedly connected between a pair of fixed rods (303), a rotating motor (304-2) fixedly connected to the motor mounting seat (304-1), a first rotating shaft (304-3) fixedly connected to the output end of the rotating motor (304-2), a pair of first eccentric wheels (304-6) fixedly and spacedly sleeved on the outside of the first rotating shaft (304-3), a first gear (304-4) located between the pair of first eccentric wheels (304-6), and a positioning plate (304-5) fixedly connected to the bottom of the motor mounting seat (304-1), the first gear (304-4) fixedly sleeved on the outside of the first rotating shaft (304-3), the first gear (304-4) connected to the second centering adjustment unit (400), and the pair of first eccentric wheels (304-6) located at a position slightly below the arc-shaped inner side of the hoop (105); During the rotation of the first eccentric wheel (304-6), the side of the first eccentric wheel (304-6) forms rolling contact with the inner arc surface of the clamp (105). When the first eccentric wheel (304-6) rotates to a specific angle, the clamp (105) moves to the top center of the cross arm (104), and the connecting line between the tangent point and the axis of the first eccentric wheel (304-6) is perpendicular to the inner arc surface of the clamp (105).

5. The automatic welding device for electric iron accessories according to claim 1, characterized in that: The second centering adjustment unit (400) comprises a pair of symmetrically arranged centering fine adjustment components (401) and a fine adjustment drive component (402); the pair of centering fine adjustment components (401) are both located below the lifting plate (302) and connected to the bottom of the lifting plate (302); the fine adjustment drive component (402) is connected to the lifting plate (302), the pair of centering fine adjustment components (401) and the pressing and fixing unit (500).

6. The automatic welding device for electric iron accessories according to claim 5, characterized in that: The centering fine adjustment component (401) comprises a connecting plate (401-1) fixedly connected to the bottom of the lifting plate (302), a second rotating shaft (401-2) rotatably connected to the front side of the connecting plate (401-1), a pair of second eccentric wheels (401-3) fixedly sleeved on the outside of the second rotating shaft (401-2), and a second gear (401-4) located between the pair of second eccentric wheels (401-3), wherein the second gear (401-4) is fixedly sleeved on the outside of the second rotating shaft (401-2) and connected to the fine adjustment drive component (402), and the pair of second eccentric wheels (401-3) are located at a position slightly above the inner arc of the hoop (105); When the second gear (401-4) and the second eccentric wheel (401-3) are driven to rotate by the fine adjustment drive assembly (402), the side of the second eccentric wheel (401-3) forms rolling contact with the inner arc surface of the clamp (105). When the second eccentric wheel (401-3) rotates to a specific angle, the clamp (105) moves to the top center of the cross arm (104), and the connecting line between the tangent point and the axis of the second eccentric wheel (401-3) is perpendicular to the inner arc surface of the clamp (105).

7. The automatic welding device for electric iron accessories according to claim 5, characterized in that: The fine adjustment drive assembly (402) comprises a slide bar (402-1) which is slidably arranged to penetrate the lifting plate (302), a pair of support bars (402-2) are symmetrically fixedly connected to the bottom of both sides of the slide bar (402-1), the pair of support bars (402-2) are in an "eight"-shaped structure, and the ends of the pair of support bars (402-2) away from the slide bar (402-1) are vertically fixedly connected to double-sided racks (402-3), and the sides of the pair of double-sided racks (402-3) away from each other are respectively meshed and connected with the opposite sides of a pair of second gears (401-4), and the other side of the double-sided racks (402-3) is connected to the pressing and fixing unit (500); The bottom end of the sliding rod (402-1) is fixedly connected with a single-sided rack (402-4), and the single-sided rack (402-4) is meshingly connected with the first gear (304-4).

8. The automatic welding device for electric iron accessories according to claim 7, characterized in that: The pressing and fixing unit (500) comprises a third rotating shaft (501) rotatably connected to the front side of the connecting plate (401-1); a third gear (502) is fixedly sleeved on the third rotating shaft (501); the third gear (502) is meshingly connected to a side of the double-sided rack (402-3) away from the second gear (401-4); an inclined plate (503) is obliquely fixedly connected to the third rotating shaft (501); a pressing plate (504) is transversely fixedly connected to the lower end of the inclined plate (503); the pressing plate (504) is adapted to the longitudinal limiting groove (202); and when the clamp (105) is centered, the pressing plate (504) is rotated to press against the top of the ear plates on both sides of the clamp (105).

9. The automatic welding device for electric iron accessories according to claim 8, characterized in that: The inclined plate (503) is provided with an escape groove (505) which is connected up and down, and the double-sided rack (402-3) is movably arranged to penetrate the escape groove (505).

10. The welding method of the automatic welding device for electric iron accessories according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Pre-welding preparation: prepare the automatic spot welding machine and place it in front of the workbench (101), and then set the corresponding welding parameters according to the welding requirements; Step 2: Assembling and positioning. First, the lifting plate (302) is driven to rise by operating the hydraulic cylinder (301), and the lifting plate (302) drives the first eccentric wheel (304-6), the second eccentric wheel (401-3) and the pressing and fixing unit (500) to rise synchronously, so as to make enough space for placing the clamp (105); then, the cross arm (104) to be welded is adapted and plugged into the positioning column (103) through the mounting holes at both ends thereof, so as to realize the positioning of the cross arm (104); then, the clamp (105) to be welded is placed on the positioned cross arm (104), and it is ensured that the ear plates on both sides of the clamp (105) are engaged in the longitudinal limiting groove (202), and the clamp (105) is supported by the support plate (203), so as to accurately position the clamp (105) in the longitudinal direction; Step 3: Centering processing, start the hydraulic cylinder (301), and its piston end drives the lifting plate (302) to move downward. The lifting plate (302) drives the centering coarse adjustment component (304), the centering fine adjustment component (401) and the pressing and fixing unit (500) to move downward synchronously through the fixing rod (303) and the connecting plate (401-1) until the positioning plate (304-5) is tightly fitted with the upper surface of the workbench (101). At this time, the positioning plate (304-5) plays a positioning role and can quickly determine the accurate positions of the first eccentric wheel (304-6) and the second eccentric wheel (401-3); Next, the rotating motor (304-2) is started, and its output end drives the first rotating shaft (304-3) to rotate clockwise, thereby driving the first eccentric wheel (304-6) and the first gear (304-4) to rotate clockwise. When the first eccentric wheel (304-6) rotates to a specific angle, it pushes the clamp (105) to move to the top center position of the cross arm (104), completing the rough centering adjustment of the clamp (105). At this time, the rotating motor (304-2) is turned off; When the first gear (304-4) rotates clockwise, it also drives the single-sided rack (402-4) bonded thereto to move downward, and the single-sided rack (402-4) drives a pair of double-sided racks (402-3) to move downward simultaneously through the sliding rod (402-1) and the supporting rod (402-2), and the pair of double-sided racks (402-3) respectively drive a pair of second gears (401-4) meshed therewith to rotate counterclockwise and clockwise, and when the first eccentric wheel (304-6) rotates to a specific angle, the second eccentric wheel (401-3) also rotates to a corresponding angle, and the centering position of the clamp (105) is further fine-tuned through the pushing action of the second eccentric wheel (401-3); Step 4: Press and fix. During the downward movement of the double-sided rack (402-3), a pair of third gears (502) meshed with the double-sided rack are driven to rotate counterclockwise and clockwise respectively. The third gear (502) drives the pressing plate (504) to rotate toward the bracket plate (201) through the inclined plate (503). When the centering adjustment of the clamp (105) is completed, the pressing plate (504) is pressed against the top of the ear plates on both sides of the clamp (105) to achieve a stable pressing and fixing of the clamp (105). Step 5: Preparatory welding: according to the welding position of the clamp (105) and the cross arm (104), the automatic welding route is set, and then the welding machine is started to perform electric welding operation on the welding position according to the set route.

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