Edge type welding device and welding method

Abstract

The invention belongs to the technical field of truss floor support plates, and discloses an evasive welding device and a welding method.The evasive welding device comprises a rack, a feeding device and a welding device body, the feeding device is arranged on the rack, and the feeding device is used for conducting synchronous stepping conveying on a steel bar truss and a bottom plate; the welding device comprises a plurality of upper electrode mechanisms arranged on the rack, the upper electrode mechanisms can ascend and descend in the height direction so as to weld the steel bar trusses conveyed in a stepping mode and the bottom plate, and the distance between every two opposite upper electrode mechanisms for welding the same steel bar truss is adjustable; according to the welding method, the evasive welding device is adopted, so that the distance between the two opposite upper electrode mechanisms of the same steel bar truss can be adjusted, the possibility that the upper electrode mechanisms collide with web member ribs can be reduced, and the welding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of truss floor deck processing, and in particular to an avoidance welding device and a welding method. Background Art

[0002] When producing truss floor decking, it is necessary to weld the trusses first, then weld the steel trusses to the base plate, and finally pour cement to form it.

[0003] In the related art, there is a truss floor decking, which fixes the connecting parts on the bottom plate with screws, and then welds the steel truss without footing to the connecting parts. This truss floor decking can save the time of removing the bottom plate after pouring cement, and at the same time causes less damage to the floor decking.

[0004] However, the trusses of the above-mentioned truss floor decking have no feet on both sides, and the traditional welding machine can only move up and down. Therefore, when welding this truss floor decking, the upper electrode will collide with the web reinforcement between adjacent welding positions when moving to the next welding position, thus requiring manual completion of the welding process, which is time-consuming and labor-intensive. Summary of the Invention

[0005] The object of the present invention is to provide an avoidance welding device and a welding method, wherein an upper electrode can avoid web reinforcement to achieve automatic welding.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An avoidance welding device comprising:

[0008] frame;

[0009] A feeding device is provided on the frame, and is used for synchronously stepping and conveying the steel bar truss and the bottom plate;

[0010] A welding device includes a plurality of upper electrode mechanisms arranged on the frame, the upper electrode mechanisms can be raised and lowered to weld the steel truss and the base plate that are transported in a step-by-step manner, and the distance between two relatively opposite upper electrode mechanisms for welding the same steel truss is adjustable.

[0011] In some embodiments, the welding device includes an avoidance driving component, which is arranged on the frame. The avoidance driving component can drive the two upper electrode mechanisms relative to each other for welding the same steel bar truss to move synchronously closer to or farther away from each other.

[0012] In some embodiments, the welding device includes two avoidance racks arranged opposite to each other, and a avoidance gear is clamped and engaged between the two avoidance racks. The two upper electrode mechanisms for welding the same steel truss are respectively connected to different avoidance racks, and the avoidance drive member drives the avoidance rack, the avoidance gear and one of the upper electrode mechanisms.

[0013] In some embodiments, the upper electrode mechanisms located on the same side of different steel trusses are connected to the same avoidance rack.

[0014] In some embodiments, the frame is provided with an avoidance slide rail, and the upper electrode mechanism slides on the avoidance slide rail.

[0015] In some embodiments, the welding device includes a transition plate, the upper electrode mechanism is arranged on the transition plate, two avoidance slide rails are provided, the two avoidance slide rails are arranged at intervals, and the transition plate is slidably connected to the avoidance slide rails.

[0016] In some embodiments, the avoidance welding device further includes a positioning device, which is disposed on the frame and is used to position the steel truss and the base plate.

[0017] In some embodiments, the positioning device includes a bottom plate positioning mechanism and a steel bar truss positioning mechanism, wherein the bottom plate positioning mechanism can support the bottom plate and limit the contact with both sides of the bottom plate along the conveying direction; the steel bar truss positioning mechanism can position and press the steel bar truss onto the bottom plate;

[0018] And / or, the positioning device further includes an end positioning mechanism, and the end positioning mechanism is capable of positioning the end surface of the steel bar truss and / or the end surface of the bottom plate.

[0019] In some embodiments, the feeding device includes a first stepping mechanism and a second stepping mechanism, and the first stepping mechanism and the second stepping mechanism are arranged on both sides of the welding device along the conveying direction of the feeding device.

[0020] A welding method is also provided, which uses the avoidance welding device as described above and comprises the following steps:

[0021] S1. Place the steel truss and the base plate on the frame, so that the welding device is aligned with the welding point position of the connecting piece between the steel truss and the base plate;

[0022] S2, upper electrode mechanism presses down for welding;

[0023] S3, after the welding is completed, the upper electrode mechanism rises, and the two upper electrode mechanisms welding the same steel bar truss are separated from each other;

[0024] S4, the feeding device conveys the steel bar truss and the bottom plate in a step-by-step manner;

[0025] S5, welding the two upper electrode mechanisms of the same steel bar truss closer to each other;

[0026] S6. Loop S2 to S5 until welding is completed.

[0027] Beneficial effects of the present invention:

[0028] When using the above-mentioned avoidance welding device, after the upper electrode mechanism descends to weld the steel truss without a foot to the connecting piece of the base plate, during the process of the upper electrode mechanism rising, the web reinforcement on the steel truss is avoided by increasing the distance between the two relative upper electrode mechanisms welding the same steel truss; then, after the feeding device steps a certain distance between the steel truss and the base plate, the distance between the two relative upper electrode mechanisms welding the same steel truss is reduced to carry out the next welding, thereby realizing automatic welding in a cycle and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the avoidance welding device of the present invention;

[0030] Figure 2 is a cross-sectional view of the avoidance welding device of the present invention;

[0031] Figure 3 is a schematic diagram of the steel bar truss positioning mechanism of the present invention;

[0032] Figure 4 is a schematic diagram of the bottom plate positioning mechanism of the present invention;

[0033] Figure 5 is a schematic diagram of the end positioning mechanism of the present invention;

[0034] Figure 6 It is a schematic diagram of the first stepping mechanism in the present invention;

[0035] Figure 7 is a schematic diagram of the second stepping mechanism of the present invention;

[0036] Figure 8 is a schematic diagram of the first clamping mechanism of the present invention;

[0037] Figure 9 It is a partial schematic diagram of the welding device of the present invention;

[0038] Figure 10 is a cross-sectional view of the welding device of the present invention;

[0039] Figure 11is a schematic diagram showing the avoidance rack of the welding device of the present invention;

[0040] Figure 12 is a schematic diagram of the upper electrode mechanism of the present invention;

[0041] Figure 13 It is a partial schematic diagram of a truss floor deck in the related art;

[0042] Figure 14 It is a flow chart of the welding method.

[0043] In the picture:

[0044] 1. Frame;

[0045] 2. Positioning device; 21. Steel bar truss positioning mechanism; 211. Pressing bracket; 212. Pressing connecting plate; 213. First lifting drive member; 214. Positioning block; 2141. Restriction groove; 215. Fifth lifting drive member; 2151. Handwheel; 2152. Screw; 22. Bottom plate positioning mechanism; 221. Roller seat; 222. Positioning member; 2221. Adjusting seat; 2222. Adjusting shaft; 2223. Positioning bearing; 223. Conveyor roller; 23. End positioning mechanism; 231. Baffle positioning bracket; 232. Second lifting drive member; 233. First baffle; 234. Second baffle;

[0046] 3. Feeding device; 31. First stepping mechanism; 311. First slide plate; 3111. First slider; 3112. First slide rail; 312. First clamping mechanism; 3121. Clamping mount; 3122. Third lifting drive member; 3123. Upper clamping plate; 3124. Lower clamping plate; 3125. Guide shaft; 3126. Clamping block; 3127. Cylinder connecting plate; 313. First stepping drive member; 314. Motor bracket; 315. Coupling; 316, ball screw; 3161, screw support seat; 3162, stepper screw base; 317, second slide rail; 318, second slider; 319, first support roller; 32, second stepping mechanism; 321, second slider; 3211, third slider; 3212, third slide rail; 322, second clamping mechanism; 323, second stepping driver; 324, first cylinder seat; 325, fisheye bearing; 326, connecting shaft; 327, second support roller;

[0047] 4. Welding device; 41. Transformer; 42. Upper electrode mechanism; 421. Fourth lifting drive member; 422. First connecting seat; 423. Upper fixing seat; 424. Guide post; 425. Upper electrode seat; 426. Round electrode; 427. Second connecting seat; 43. Avoidance drive member; 44. Avoidance rack; 45. Avoidance gear; 46. Avoidance slide rail; 47. Avoidance slider; 48. Transition plate;

[0048] 10. Truss floor deck; 101. Bottom plate; 102. Steel truss; 1021. Web reinforcement; 103. Connectors. DETAILED DESCRIPTION

[0049] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0050] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0051] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0052] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0053] like Figures 1 to 12 As shown, the present application provides an avoidance welding device for welding a steel truss 102 without a foot to a connecting piece 103 of a bottom plate 101 to form a Figure 13 The truss floor deck 10 shown in FIG. Figure 1As shown, the avoidance welding device includes a frame 1, a feeding device 3 and a welding device 4. The feeding device 3 is arranged on the frame 1 and is used to synchronously step and transport the steel truss 102 and the bottom plate 101 (the transport direction is Figure 1 The welding device 4 includes a plurality of upper electrode mechanisms 42 provided on the frame 1, and the upper electrode mechanism 42 can be arranged in the height direction ( Figure 1 The Z direction) is lifted and lowered to weld the steel truss 102 and the bottom plate 101 that are transported in a step-by-step manner, and the distance between the two upper electrode mechanisms 42 that are relatively welded on the same steel truss 102 is adjustable.

[0054] Using the above-mentioned avoidance welding device, after the upper electrode mechanism 42 descends to weld the steel truss 102 without a foot to the connecting piece 103 of the bottom plate 101, during the process of the upper electrode mechanism 42 rising, the web reinforcement 1021 on the steel truss 102 is avoided by increasing the distance between the two relative upper electrode mechanisms 42 welding the same steel truss 102; then the feeding device 3 steps a certain distance between the steel truss 102 and the bottom plate 101, and then reduces the distance between the two relative upper electrode mechanisms 42 welding the same steel truss 102 to carry out the next welding, thereby completing the automatic welding in a cycle and improving efficiency.

[0055] It can be understood that the bottom plate 101 has a width direction ( Figure 1 Multiple steel trusses 102 can be welded in parallel in the Y direction (in the Y direction), and the specific number is not limited.

[0056] like Figure 1 As shown, in some embodiments, the avoidance welding device includes a positioning device 2, which is arranged on the frame 1. The positioning device 2 is used to position the steel truss 102 and the base plate 101, which may include but is not limited to end positioning of the initial position of the steel truss 102 and the base plate 101 and guide positioning on both sides during the welding process.

[0057] like Figure 2 As shown, in some embodiments, the positioning device 2 includes a bottom plate positioning mechanism 22 and a steel bar truss positioning mechanism 21. Two bottom plate 101 mechanisms are provided. The position of the welding device 4 on the frame 1 is defined as the welding position. The two bottom plate positioning mechanisms 22 are provided at both ends of the welding position along the conveying direction of the bottom plate 101 and the steel bar truss 102. The bottom plate positioning mechanism 22 can support the bottom plate 101 and abut against both sides of the bottom plate 101 along the conveying direction to limit the position; the steel bar truss positioning mechanism 21 is located above the bottom plate positioning mechanism 22. It can be understood that the steel bar truss positioning mechanism 21 can be provided in two groups or in one group. Figure 3As shown, the steel truss positioning mechanism 21 includes a positioning block 214 and a first lifting drive member 213. The positioning block 214 is arranged at the output end of the first lifting drive member 213. The first lifting drive member 213 is configured to drive the positioning block 214 to move up and down, so that the positioning block 214 can position the steel truss 102 and press it onto the base plate 101.

[0058] In the current embodiment, the first lifting drive member 213 adopts a linear drive member, which can be but not limited to a cylinder. The number of the first lifting drive members 213 and the positioning blocks 214 matches the number of the steel trusses 102 so as to achieve simultaneous positioning of each steel truss 102. In the current embodiment, six first lifting drive members 213 are arranged at intervals on the pressing connecting plate 212 and correspond to the standard positions of the six steel trusses 102. The two ends of the pressing connecting plate 212 are respectively fixed to two pressing brackets 211. The two pressing brackets 211 are symmetrically arranged on both sides of the welding position and the bottom end of the pressing bracket 211 is fixed to the frame 1. The output end of the first lifting drive member 213 is downward and connected to the positioning block 214. Further, the positioning block 214 is arranged corresponding to the steel truss 102. Each positioning block 214 is provided with a limiting groove 2141. The limiting groove 2141 is adapted to the connection position of the top reinforcement and the web reinforcement of the steel truss 102. For example, the limiting groove 2141 can be but not limited to a V-shaped groove. After the bottom plate 101 is positioned by the bottom plate positioning mechanism 22, the position of the steel truss 102 above the bottom plate 101 may deviate slightly from the desired standard position. In this case, the downward movement of the limiting groove 2141 can correct the position of the steel truss 102, thereby achieving the purpose of positioning the steel truss 102. Pressing the positioning block 214 against the steel truss 102 during welding can also prevent the steel truss 102 from warping during welding, thereby improving welding quality. Furthermore, the steel bar truss positioning mechanism 21 also includes a fifth lifting drive member 215. In the current embodiment, the fifth lifting drive member 215 is a manual drive member. Of course, a pneumatic or electric drive mechanism such as a cylinder can also be used. When the fifth lifting drive member 215 is a manual drive member, the fifth lifting drive member 215 includes a handwheel 2151 and a screw rod 2152. The handwheel 2151 is fixed to the top of the screw rod 2152, and the bottom end of the screw rod 2152 transmits the pressing bracket 211 and is threadedly connected to the pressing connecting plate 212. At this time, the pressing connecting plate 212 is slidingly connected to the pressing bracket 211, and the screw rod 2152 is driven to rotate by the handwheel 2151, and the pressing connecting plate 212 moves up and down along the pressing bracket 211, thereby increasing the height adjustment range of the positioning block 214 and having a wider range of applications.

[0059] like Figure 3As shown, the two bottom plate positioning mechanisms 22 are used to double-limit the bottom plate 101 at both ends of the welding position, ensuring the stability of the bottom plate 101 during the stepping movement and welding process. The two bottom plate positioning mechanisms 22 can adopt the same structure, one of which is used to position the bottom plate 101 before welding so that the bottom plate 101 is in the appropriate position; the other bottom plate positioning mechanism 22 is installed at the rear end of the frame 1, located downstream in the stepping forward direction of the bottom plate 101, and is used to support and position the steel bar truss 102 and the bottom plate 101 after welding.

[0060] like Figure 4 As shown, specifically, the bottom plate positioning mechanism 22 includes a roller seat 221 and positioning members 222. The roller seat 221 is mounted on the frame 1. A plurality of conveying rollers 223 are rotatably mounted on the roller seat 221 to rollably support the bottom plate 101. The conveying rollers 223 can reduce frictional resistance during the conveying process of the bottom plate 101. There are multiple positioning members 222, each of which is adjustable in position on the roller seat 221. Any two positioning members 222 arranged opposite each other along the conveying direction can abut against both sides of the bottom plate 101 to limit the position. The positioning member 222 is arranged between two adjacent conveying rollers 223. The positioning member 222 includes an adjusting seat 2221, an adjusting shaft 2222 and a positioning bearing 2223. The adjusting seat 2221 is adjustable and is arranged on the roller seat 221. The adjusting seat 2221 includes a fixed part and an adjustable part. The fixed part is fixed on the roller seat 221. The adjustable part is connected to the fixed part through screws and bolts, and the adjustable part is slidably installed with the roller seat 221. The sliding direction is perpendicular to the conveying direction of the base plate 101, so as to facilitate adjustment to the width specifications of the base plate 101; the adjusting shaft 2222 and the adjustable part are adjustable along the height direction, and the positioning bearing 2223 is fixedly arranged on the adjusting shaft 2222, and then the height of the positioning bearing 2223 can be adjusted by the adjusting shaft 2222, so that the positioning bearing 2223 can abut against the base plate 101 for positioning. In some embodiments, the positioning member 222 further includes a positioning shaft, which is detachably connected to the positioning bearing 2223 to increase the positioning adjustment range of the positioning member 222 and adapt to different specifications of the base plate 101.

[0061] like Figure 2 and Figure 5 As shown, in some embodiments, the positioning device 2 also includes an end positioning mechanism 23, the end positioning mechanism 23 includes a first baffle 233 and a second lifting drive member 232, and the second lifting drive member 232 is configured to drive the first baffle 233 to move up and down to position the end face of the steel truss 102 and / or the end face of the bottom plate 101.

[0062] The baffle positioning bracket 231 is fixedly mounted on the frame 1 and positioned below the base plate 101 to be welded. The second lifting drive 232 is mounted on the baffle positioning bracket 231. The output end of the second lifting drive 232 extends vertically upward through the baffle positioning bracket 231. The first baffle 233 is fixedly connected to the output end of the second lifting drive 232 for lifting and lowering motion. The first baffle 233 is used for the initial positioning of the steel truss 102 and the base plate 101. When the steel truss 102 and the base plate 101 are transported forward, the second lifting drive 232 drives the first baffle 233 upward. When the steel truss 102 and the base plate 101 are transported to the first baffle 233, their ends are blocked by the first baffle 233, and the initial position of the steel truss 102 and the base plate 101 is now determined. The initial position is such that the first welding point of the connecting piece 103 on the steel truss 102 and the bottom plate 101 is located at the welding position. After the positioning is completed, the second lifting drive 232 drives the first baffle 233 to descend, and the welding device 4 begins welding. The first baffle 233 does not affect the stepping conveyance of the steel truss 102 and the bottom plate 101. The second lifting drive 232 can be, but is not limited to, a linear drive mechanism such as a cylinder.

[0063] For some truss floor decks 10 that require the ends of the steel trusses 102 to protrude from the bottom plate 101 for welding, a second stopper 234 is detachably mounted on the first stopper 233. The first stopper 233 and the second stopper 234 respectively abut the end faces of the steel trusses 102 and the end faces of the bottom plate 101. The second stopper 234 is located on the side of the first stopper 233 facing the incoming direction of the steel trusses 102 and the bottom plate 101. When the steel trusses 102 and the bottom plate 101 are conveyed, the end of the bottom plate 101 preferentially abuts the second stopper 234. At this time, the end of the steel trusses 102 has not yet contacted the first stopper 233. As the steel trusses 102 continue to be conveyed forward, the end of the steel trusses 102 abuts the first stopper 233. At this time, the end of the steel trusses 102 protrudes from the end of the bottom plate 101. It is understandable that if the steel bar truss 102 is not required to protrude from the end of the bottom plate 101, the second baffle 234 can be removed.

[0064] like Figure 2 As shown, in some embodiments, the feeding device 3 includes a first stepping mechanism 31 and a second stepping mechanism 32. The first stepping mechanism 31 and the second stepping mechanism 32 are arranged on both sides of the welding device 4 along the conveying direction and are both fixed on the frame 1.

[0065] like Figure 6As shown, the first stepping mechanism 31 includes a first slide 311 and a first clamping mechanism 312. The first slide 311 is slidably mounted on the frame 1 and is located upstream of the welding device 4. The first clamping mechanism 312 is provided on the first slide 311. The first clamping mechanism 312 is used to clamp the bottom plate 101. The first slide 311 can drive the steel bar truss 102 and the bottom plate 101 to step along the conveying direction. Figure 7 As shown, the second stepping mechanism 32 includes a second slide 321 and a second clamping mechanism 322. The second slide 321 is slidably mounted on the frame 1 and is located downstream of the welding device 4. The second clamping mechanism 322 is provided on the second slide 321. The second clamping mechanism 322 is used to clamp and fix the base plate 101. The second slide 321 can drive the steel truss 102 and the base plate 101 to move in a stepwise manner along the conveying direction. Due to the position relationship, the first stepping mechanism 31 cannot clamp the steel truss 102 and the base plate 101 in the last step of welding. Therefore, the last step welding of the steel truss 102 and the base plate 101 is achieved by clamping and stepping by the second stepping mechanism 32.

[0066] The first slide 311 is provided with two sets of first clamping mechanisms 312, and the second slide 321 is provided with two sets of second clamping mechanisms 322. The first clamping mechanisms 312 and the second clamping mechanisms 322 are respectively used to compress and clamp the steel truss 102 and the base plate 101. The first stepping mechanism 31 is used to synchronously advance the steel truss 102 and the base plate 101 from the first weld point to the second-to-last weld point. The second stepping mechanism 32 is located downstream of the first stepping mechanism 31 and is used to synchronously advance the steel truss 102 and the base plate 101 to the last weld point. In addition, during the automatic welding process, before the first stepping mechanism 31 returns to its original position, the second clamping mechanisms 322 on the second stepping mechanism 32 first compress and clamp the steel truss 102 and the base plate 101. Subsequently, the first clamping mechanisms 312 on the first stepping mechanism 31 release the pressure on the steel truss 102 and the base plate 101 to prevent the steel truss 102 and the base plate 101 from displacement due to friction. Before the first stepping mechanism 31 prepares to step, the first clamping mechanism 312 on the first stepping mechanism 31 will first press and clamp the steel truss 102 and the base plate 101, and then the second clamping mechanism 322 on the second stepping mechanism 32 will release the pressure on the steel truss 102 and the base plate 101. That is, during the stepping and welding process of the steel truss 102 and the base plate 101, one of the first clamping mechanism 312 and the second clamping mechanism 322 will always press the steel truss 102 and the base plate 101 to ensure the welding effect of the steel truss 102 and the base plate 101.

[0067] Specifically, the first stepping mechanism 31 further includes a first stepping driver 313, which is mounted on the frame 1. The first slide 311 is slidably connected to the frame 1, and the first stepping driver 313 drives the first slide 311 to slide linearly relative to the frame 1. The first clamping mechanism 312 is mounted on the first slide 311 and can move synchronously with the first slide 311. Through this structure, after the first clamping mechanism 312 compresses and clamps the steel truss 102 and the base plate 101, the first stepping driver 313 drives the first slide 311 to slide, and at the same time drives the first clamping mechanism 312 mounted on the first slide 311 and the steel truss 102 and the base plate 101 compressed by the first clamping mechanism 312 to slide synchronously, so that the steel truss 102 and the base plate 101 are synchronously stepped to the welding device 4.

[0068] In the current embodiment, the first stepper drive member 313 can be, but is not limited to, a motor. The motor is mounted on a motor bracket 314, which is mounted at the front end of the frame 1. The output end of the motor can be connected to the first end of a ball screw 316 via a coupling 315. Screw support seats 3161 are provided on both sides of the motor bracket 314. The ball screw 316 is rotatably inserted into the screw support seats 3161. The second end of the ball screw 316 is threadedly connected to a stepper screw nut 3162. The stepper screw nut 3162 is fixedly connected to the first slide 311. First sliders 3111 are provided at the bottom of both sides of the first slide 311. First slide rails 3112 are provided on the frame 1. The first slide rails 3112 are parallel to the axis of the ball screw 316. The first sliders 3111 are slidably provided on the first slide rails 3112. When the motor drives the ball screw 316 to rotate, the stepping screw base 3162 moves linearly relative to the ball screw 316, thereby driving the first slide 311 to move linearly. At this time, the first clamping mechanism 312 installed on the first slide 311 and the steel truss 102 and the base plate 101 pressed by the first clamping mechanism 312 will also be driven to move.

[0069] In the current embodiment, the setting of the above-mentioned first slider 3111 and the first slide rail 3112 not only limits the rotational movement of the first slide plate 311 around the rotation axis of the ball screw 316, ensuring that the first slide plate 311 only moves in the axial direction of the rotation axis of the ball screw 316, but also effectively reduces the friction during the movement and reduces energy loss.

[0070] Furthermore, two sets of sliding assemblies are added in the middle below the first slide 311, and the sliding assemblies include a second slide rail 317 and a second slider 318. The second slide rail 317 is parallel to the first slide rail 3112. The second slide rail 317 is set on the frame 1, and the second slider 318 is slidably installed on the second slide rail 317. The second slider 318 is fixedly set on the bottom surface of the first slide 311. The upper electrode mechanism 42 will generate impact force when welding downward. The second slide rail 317 is added to reduce the impact on the first slide 311. Furthermore, the first step mechanism 31 also includes a first support roller 319, which is rotatably installed on the first slide 311. The first support roller 319 is used to assist the first slide 311 to roll and support the bottom plate 101, thereby reducing the friction between the bottom plate 101 and the first slide 311.

[0071] In the current embodiment, the motor may be a servo motor. Compared to ordinary motors, a servo motor has the advantages of being controllable and having high precision. In addition, a servo motor has a fast response speed and can achieve frequent forward and reverse rotation to adjust the position of the first slide 311. The axis of the output shaft of the motor coincides with the axis of the ball screw 316.

[0072] It is understandable that the first step driving member 313 of this embodiment may also be a cylinder, and the output end of the cylinder is drivingly connected to the first slide 311 to drive the first slide 311 to move.

[0073] like Figure 7 As shown, the second stepping mechanism 32 further includes a second stepping driver 323, wherein the second stepping driver 323 is mounted on the frame 1, and the second slide 321 is slidably connected to the frame 1. The second stepping driver 323 drives the second slide 321 to slide linearly relative to the frame 1. The second clamping mechanism 322 is mounted on the second slide 321 and can slide with the second slide 321. After the second clamping mechanism 322 compresses and clamps the steel truss 102 and the base plate 101, the second stepping driver 323 drives the second slide 321 to slide, simultaneously driving the second clamping mechanism 322 mounted on the second slide 321, and the steel truss 102 and the base plate 101 compressed by the second clamping mechanism 322 to step synchronously.

[0074] For example, the second stepper drive 323 can be, but is not limited to, a pneumatic cylinder mounted on a first cylinder base 324 mounted at the rear end of the frame 1. The output end of the cylinder is connected to a connecting shaft 326 via a fisheye bearing 325. The axis of the connecting shaft 326 is perpendicular to the axis of the cylinder output end. The second slide 321 is fixedly connected to the connecting shaft 326. The cylinder can be extended and retracted to drive the second slide 321 to move in a straight line.

[0075] Furthermore, third sliders 3211 are provided on both sides of the bottom of the second slide plate 321 , and the frame 1 is provided with third slide rails 3212 . The third sliders 3211 slide on the third slide rails 3212 , and the third slide rails 3212 are parallel to the axis of the output end of the second stepping drive 323 .

[0076] The first stepping mechanism 31 and the second stepping mechanism 32 can use the same driving structure to respectively drive the first slide 311 and the second slide 321 to slide on the frame 1. Furthermore, a second support roller 327 is rotatably provided on the second slide 321. The second support roller 327 is used to rollingly support the bottom plate 101 to reduce the friction between the bottom plate 101 and the second slide 321.

[0077] In some embodiments, the first clamping mechanism 312 and the second clamping mechanism 322 adopt the same structure, the two first clamping mechanisms 312 are arranged on the first slide 311, and the two second clamping mechanisms 322 are arranged on the second slide 321. Taking the first clamping mechanism 312 being arranged on the first slide 311 as an example, Figure 8 As shown, the first clamping mechanism 312 includes a clamping fixed seat 3121, a third lifting drive member 3122, an upper pressing plate 3123 and a lower pressing plate 3124. The clamping fixed seat 3121 is arranged on the first slide 311, and a guide shaft 3125 is provided on the clamping fixed seat 3121; the third lifting drive member 3122 is arranged at the top of the guide shaft 3125, and the output end of the third lifting drive member 3122 is arranged vertically downward; the upper pressing plate 3123 is arranged at the output end of the third lifting drive member 3122, and a pressing block 3126 is provided on the lower surface of the upper pressing plate 3123; the lower pressing plate 3124 is arranged on the first slide 311, and the lower pressing plate 3124 is arranged opposite to the pressing block 3126. The third lifting drive member 3122 drives the pressing block 3126 to descend and presses the steel truss 102 and the bottom plate 101 onto the lower pressing plate 3124.

[0078] In the current embodiment, the third lift drive member 3122 is a pneumatic cylinder. This cylinder is a pressure plate cylinder, mounted on a clamping mount 3121 via four guide shafts 3125 and two cylinder connecting plates 3127. The two clamping mounts 3121 are symmetrically positioned on the first slide 311. The pressure plate cylinder drives the upper pressure plate 3123 in a lifting and lowering motion, pressing down and lifting. Four guide shafts 3125 extend through the upper pressure plate 3123 to provide guidance.

[0079] When the second clamping mechanism 322 on the second stepping mechanism 32 presses the steel truss 102 and the base plate 101, the steel truss positioning mechanism 21 simultaneously presses and positions the steel truss 102, and then by pressing and fixing the steel truss 102 and the base plate 101 at the front and rear positions, the steel truss 102 and the base plate 101 can be effectively prevented from warping during the welding action.

[0080] like Figures 9 to 12 As shown, in some embodiments, the welding device 4 includes a plurality of upper electrode mechanisms 42 and a transformer 41, wherein the upper electrode mechanism 42 includes a fourth lifting drive member 421, a first connecting seat 422, an upper fixed seat 423, a guide column 424, an upper electrode seat 425, a circular electrode 426 and a second connecting seat 427, the fourth lifting drive member 421 is arranged on the upper fixed seat 423 through the first connecting seat 422, and the output end of the fourth lifting drive member 421 slides vertically downward and penetrates the upper fixed seat 423; The top of the column 424 is penetrated by an upper fixed seat 423 and is connected to the output end of the fourth lifting drive member 421. The bottom end of the guide column 424 is provided with a second connecting seat 427, an upper electrode seat 425 is provided on the second connecting seat 427, a circular electrode 426 is provided on the upper electrode seat 425, and the upper electrode seat 425 is electrically connected to the transformer 41; the fourth lifting drive member 421 drives the guide column 424 to rise and fall, and the guide column 424 drives the second connecting seat 427 to move, thereby driving the upper electrode seat 425 and the circular electrode 426 to rise and fall.

[0081] It should be noted here that the two adjacent upper electrode mechanisms 42 of the same steel truss 102 are respectively connected to the positive and negative poles of the transformer. After the upper electrode mechanism 42 is pressed down, the two adjacent circular electrodes 426 are pressed down to clamp the steel truss 102 and the bottom plate 101 to form a closed loop for resistance welding.

[0082] like Figure 10 and Figure 11 As shown, in some embodiments, the welding device 4 includes an avoidance driving member 43, which is arranged on the frame 1, so that the avoidance driving member 43 drives the two relative upper electrode mechanisms 42 for welding the same steel truss 102 to approach or move away from each other synchronously to avoid the web reinforcement 1021.

[0083] Specifically, the welding device 4 also includes two avoidance racks 44 arranged opposite to each other, the two avoidance racks 44 extend along the Y direction, the teeth of the two avoidance racks 44 are arranged opposite to each other, and a avoidance gear 45 is engaged between the two avoidance racks 44, and the upper fixed seat 423 on the two opposite upper electrode mechanisms 42 for welding the same steel bar truss 102 is fixed on different avoidance racks 44, so that when the avoidance gear 45 is driven to rotate or one of the avoidance racks 44 is driven to move in one direction of the Y direction, the other avoidance rack 44 can be moved in the other direction of the Y direction, so that during the movement of the avoidance rack 44, the distance between the two opposite upper electrode mechanisms 42 for welding the same steel bar truss 102 is synchronously approached or synchronously moved away. For the convenience of driving, the avoidance drive 43 can be connected to the avoidance rack 44 to drive the avoidance rack 44 to move in the Y direction; or the avoidance drive 43 can be connected to the upper fixed seat 423 in one of the upper electrode mechanisms 42, thereby directly driving the upper electrode mechanism 42 to move in the Y direction, and then transmitting to the other upper electrode mechanism 42 to move in the opposite direction through the avoidance rack 44 and the avoidance gear 45; or the avoidance drive 43 can be connected to the avoidance gear 45, thereby driving the avoidance gear 45 to rotate, thereby enabling the two avoidance racks 44 to move in opposite directions. For example, the avoidance drive 43 can be a linear drive, which can be, but is not limited to, a cylinder; in this case, the output end of the avoidance drive 43 can be connected to the upper fixed seat 423 or the avoidance rack 44; the avoidance drive 43 can be a rotary drive, which can be, but is not limited to, a motor; in this case, the output end of the avoidance drive 43 can be connected to the avoidance gear 45.

[0084] It should be noted here that when the base plate 101 has multiple steel trusses 102, different steel trusses 102 can be equipped with a set of avoidance driving members 43, avoidance racks 44 and avoidance gears 45. In order to reduce costs and improve the synchronization of the movement of the upper electrode mechanism 42 for welding different steel trusses, in the current embodiment, one avoidance driving member 43 is provided, two avoidance racks 44 are provided, and the avoidance gears 45 can be provided, but not limited to, one, two or more. Two or more avoidance gears 45 can improve the stability of the transmission of the avoidance rack 44. In the current embodiment, the upper electrode mechanisms 42 located on the same side of different steel trusses 102 are connected to the same avoidance rack 44, so that the upper electrode mechanisms 42 on different steel trusses 102 can move synchronously. Taking the example of 6 steel trusses 102 set on the bottom plate 101, 12 upper electrode mechanisms 42 are set, and are numbered 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12 in sequence from one end to the other end along the Y direction; among them, No. 1 and No. 2 are a group welded to the same steel truss 102; and so on, No. 3 and No. 4 are a group, No. 5 and No. 6 are a group, No. 7 and No. 8 are a group, No. 9 and No. 10 are a group, and No. 11 and No. 12 are a group; thus, No. 1, 3, 5, 7, 9, and 11 upper electrode mechanisms 42 are connected to one of the avoidance driving members 43; and No. 2, 4, 6, 8, 10, and 12 upper electrode mechanisms 42 are connected to the other avoidance driving member 43, so that the two relative upper electrode mechanisms 42 welding the same steel truss 102 can synchronously approach or move away from the steel truss.

[0085] In some embodiments, the frame 1 is further provided with an avoidance rail 46, which extends along the Y direction. The avoidance rail 46 is provided with a slidable avoidance slider 47. The number of avoidance sliders 47 corresponds to the number of upper electrode mechanisms 42. The upper fixed seat 423 in the upper electrode mechanism 42 is connected to the avoidance slider 47, so that the upper electrode mechanism 42 can move along the avoidance rail 46, further improving the stability of the movement of the upper electrode mechanism 42. Furthermore, there are two avoidance rails 46, which are arranged on opposite sides of the upper electrode mechanism 42 along the X direction, and the welding device 4 also includes a transition plate 48. The upper fixed seat 423 in the upper electrode mechanism 42 is fixed on the transition plate 48, and the transition plate 48 is slidably connected to the avoidance rail 46. The stability of the movement of the upper electrode mechanism 42 is further improved by the two avoidance rails 46.

[0086] like Figure 14 As shown, the present application also provides a welding method, which uses the above-mentioned avoidance welding device, and the welding method includes the following steps:

[0087] S1, place the steel truss 102 and the bottom plate 101 on the frame 1, so that the welding device 4 is aligned with the welding point position of the connecting parts on the steel truss 102 and the bottom plate 101;

[0088] S2, the upper electrode mechanism 42 presses down for welding;

[0089] S3, after the welding is completed, the upper electrode mechanism 42 rises, and the two upper electrode mechanisms 42 on the same steel truss 102 are welded away from each other;

[0090] S4, the feeding device 3 conveys the steel truss 102 and the bottom plate 101 in steps;

[0091] S5, welding the two upper electrode mechanisms 42 of the same steel truss 102 closer to each other;

[0092] S6. Repeat S2 to S5 until all the connecting parts on the steel truss 102 and the bottom plate 101 are welded. It should be noted that in S6, the welding point needs to be confirmed. If the welding point at the welding position is the last welding point, the welding is completed and the process ends; otherwise, the two upper electrode mechanisms 42 welding the same steel truss 102 are brought close to each other and the process continues to cycle S2 to S5.

[0093] In some embodiments, before S1, the steel truss 102 and the base plate 101 need to be transported along the X direction, the first baffle 233 of the end positioning mechanism 23 rises, and the steel truss 102 and the base plate 101 will be blocked by the first baffle 233. At this time, the steel truss 102 and the base plate 101 will be positioned, and the first baffle 233 will be reset; the two base plate positioning mechanisms 22 position the base plate 101 in the width direction; the steel truss positioning mechanism 21 positions the steel truss 102, and the steel truss 102 and the base plate 101 are stably placed on the frame 1.

[0094] The above welding method can adjust the distance between the two upper electrode mechanisms 42 of the same steel truss 102 when welding the connecting piece to the bottom plate 101, thereby reducing the possibility of the upper electrode mechanism 42 hitting the web reinforcement 1021, thereby realizing automatic welding. Figure 13 The truss floor deck 10 shown improves welding efficiency.

[0095] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Avoidance welding device, characterized in that, include: Rack (1); A feeding device (3) is provided on the frame (1), and the feeding device (3) is used for synchronously stepping and conveying the steel bar truss (102) and the bottom plate (101); A welding device (4) includes a plurality of upper electrode mechanisms (42) arranged on the frame (1), wherein the upper electrode mechanisms (42) can be raised and lowered to weld the steel truss (102) and the base plate (101) that are transported in a stepwise manner, and the spacing between two relative upper electrode mechanisms (42) for welding the same steel truss (102) is adjustable.

2. The avoidance welding device according to claim 1, characterized in that: The welding device (4) includes an avoidance driving member (43), which is arranged on the frame (1). The avoidance driving member (43) can drive the two upper electrode mechanisms (42) welding the same steel bar truss (102) to move synchronously toward or away from each other.

3. The avoidance welding device according to claim 2, characterized in that: The welding device (4) includes two avoidance racks (44) arranged opposite to each other, a avoidance gear (45) is clamped and meshed between the two avoidance racks (44), and two upper electrode mechanisms (42) for welding the same steel bar truss (102) are respectively connected to different avoidance racks (44), and the avoidance driving member (43) drives and connects the avoidance racks (44), the avoidance gear (45) and one of the upper electrode mechanisms (42).

4. The avoidance welding device according to claim 3, characterized in that: The upper electrode mechanisms (42) located on the same side of different steel bar trusses (102) are connected to the same avoidance rack (44).

5. The avoidance welding device according to claim 1, characterized in that: The frame (1) is provided with an avoidance slide rail (46), and the upper electrode mechanism (42) slides on the avoidance slide rail (46).

6. The avoidance welding device according to claim 5, characterized in that: The welding device (4) includes a transition plate (48), the upper electrode mechanism (42) is arranged on the transition plate (48), two avoidance slide rails (46) are provided, the two avoidance slide rails (46) are arranged at intervals, and the transition plate (48) is slidably connected to the avoidance slide rails (46).

7. The avoidance welding device according to any one of claims 1 to 6, characterized in that: The avoidance welding device further comprises a positioning device (2), wherein the positioning device (2) is arranged on the frame (1), and the positioning device (2) is used to position the steel bar truss (102) and the bottom plate (101).

8. The avoidance welding device according to claim 7, characterized in that: The positioning device (2) comprises a bottom plate positioning mechanism (22) and a steel bar truss positioning mechanism (21), wherein the bottom plate positioning mechanism (22) is capable of supporting the bottom plate (101) and limiting contact with both sides of the bottom plate (101) along the conveying direction; and the steel bar truss positioning mechanism (21) is capable of positioning and pressing the steel bar truss (102) onto the bottom plate (101). And / or, the positioning device (2) further comprises an end positioning mechanism (23), and the end positioning mechanism (23) is capable of positioning the end face of the steel bar truss (102) and / or the end face of the bottom plate (101).

9. The avoidance welding device according to any one of claims 1 to 6, characterized in that: The feeding device (3) comprises a first stepping mechanism (31) and a second stepping mechanism (32), and the first stepping mechanism (31) and the second stepping mechanism (32) are arranged on both sides of the welding device (4) along the conveying direction of the feeding device (3).

10. A welding method using the avoidance welding device according to any one of claims 1 to 9, characterized in that: The steps include: S1, placing the steel bar truss (102) and the bottom plate (101) on the frame (1), so that the welding device (4) is aligned with the welding point position of the connecting piece (103) on the steel bar truss (102) and the bottom plate (101); S2, the upper electrode mechanism (42) presses down for welding; S3, after welding is completed, the upper electrode mechanism (42) rises, and during this period, the two upper electrode mechanisms (42) that are opposite to each other and are welded on the same steel bar truss (102) are spaced apart from each other; S4, the feeding device (3) conveys the steel bar truss (102) and the bottom plate (101) in a step-by-step manner; S5, welding the two upper electrode mechanisms (42) of the same steel bar truss (102) closer to each other; S6. Loop S2 to S5 until welding is completed.

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