Conveying chain welding production line for embedded scraper transporter and using method of conveying chain welding production line

Abstract

The invention discloses a conveying chain welding production line for an embedded scraper transporter and a using method thereof. The conveying chain welding production line comprises a welding robot and a welding tool. The welding tool comprises a tool rack, a movable welding workbench is installed on the tool rack, and a conveying chain to be welded is placed on the welding workbench in the length direction. A plurality of sets of welding positioning clamps are arranged below the welding workbench, and reinforcing ribs are clamped through the welding positioning clamps and positioned on the right-angle lug plate so that the welding robot can weld and fix the reinforcing ribs and the right-angle lug plate. According to the conveying chain welding production line, the two welding tools are provided with the welding robot, the welding robot alternately works on the two welding tools, a large amount of time for the welding robot to wait for feeding, positioning and clamping is saved, and the welding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of conveyor chain production, and particularly relates to a welding production line for a conveyor chain used in an enclosed scraper conveyor and a method for using the same. Background Art

[0002] An enclosed scraper conveyor is a continuous conveying device that conveys powdery and granular materials by means of a moving scraper chain in a closed rectangular cross-section housing. Since the scraper chain is completely buried in the material during material conveyance, it is called an enclosed scraper conveyor. This device has a simple structure, good rigidity, good sealing performance, convenient installation and maintenance, and flexible process layout. It can not only convey horizontally, but also convey obliquely or vertically, so it is widely used in various industrial production processes.

[0003] As Figure 1 shown, the scraper chain 10 includes a plurality of continuous chain links 100. Adjacent chain links 100 are connected by chain plates, and according to the design of the scraper, some of the chain plates are replaced with right-angle ear plates 200, which can not only serve as connectors between the chain links 100, but also be used for installing the scraper. When the scraper conveys materials, a reaction force will be applied to the right-angle ear plate 200, and the load-bearing strength of the right-angle ear plate 200 will determine the conveying capacity of the conveyor. Therefore, stiffeners 300 are usually welded on the right-angle ear plate 200 to enhance the load-bearing strength of the right-angle ear plate 200.

[0004] At present, the conveyor chains used in large enclosed scraper conveyors are not only very long, but also weigh dozens to hundreds of kilograms. Relying solely on manual welding of the stiffeners 300 on the welding workbench is time-consuming and laborious, and the welding accuracy cannot be guaranteed. Therefore, there is an urgent need for a welding production line to automatically weld the stiffeners 300 on the conveyor chain to meet the welding requirements of heavy-duty conveyor chains. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding production line for a conveyor chain used in an enclosed scraper conveyor and a method for using the same to solve the problem of difficult welding of stiffeners for heavy-duty conveyor chains.

[0006] To solve the above technical problems, the present invention provides a welding production line for a conveyor chain used in an enclosed scraper conveyor, including a welding robot and a welding tooling; The welding tooling includes a tooling frame, and a movable welding workbench is installed on the tooling frame. The conveyor chain to be welded is placed along the length direction on the welding workbench; A plurality of groups of welding positioning jigs are arranged below the welding workbench. The stiffeners are clamped by the welding positioning jigs and positioned on the right-angle ear plates for the welding robot to weld and fix the stiffeners to the right-angle ear plates.

[0007] Preferably, there are two sets of the welding tooling, which are arranged in parallel, and the welding robot is arranged between the two sets of the welding tooling and can alternately weld the conveying chains on the two sets of the welding tooling.

[0008] Preferably, the welding positioning fixture includes a fixed jaw and a movable jaw, and the movable jaw rotates relative to the fixed jaw around a central rotating shaft; A torsion spring is further arranged between the fixed jaw and the movable jaw, and the elastic force of the torsion spring is used to push the movable jaw close to the fixed jaw and clamp the reinforcing rib placed between the two.

[0009] Preferably, symmetric arc grooves are arranged at the ends of the fixed jaw and the movable jaw; after the fixed jaw and the movable jaw are combined, the two arc grooves are combined to form a U-shaped clamping jaw, which can clamp the cylindrical reinforcing rib.

[0010] Preferably, a feeding cylinder is arranged at one end of the movable jaw away from the U-shaped clamping jaw. When the piston rod of the feeding cylinder extends, it contacts and pushes the lower part of the movable jaw to rotate around the central rotating shaft, and at the same time, the upper U-shaped clamping jaw gradually opens to allow the reinforcing rib to be placed; when the piston rod of the feeding cylinder retracts, the movable jaw rotates under the elastic force of the torsion spring to clamp and fix the reinforcing rib placed in the U-shaped clamping jaw.

[0011] Preferably, an adjusting screw is arranged at the bottom of the fixed jaw, and the adjusting screw is in threaded connection with the fixed jaw. By screwing the adjusting screw, the height of the welding positioning fixture in the vertical direction and the angle of rotation around the central axis can be adjusted; A set screw is further arranged on the side wall of the fixed jaw, and the set screw vertically penetrates the fixed jaw and contacts the adjusting screw, so as to lock the height of the welding positioning fixture in the vertical direction.

[0012] Preferably, there are multiple sets of the welding positioning fixtures, which are arranged at intervals on the lifting plate, and each set of the welding positioning fixtures corresponds to a right-angle ear plate of the conveying chain respectively; The welding positioning fixture is connected to the waist-shaped hole on the lifting plate through an adjusting screw and a locking nut, and the welding positioning fixture can adjust its position in the horizontal direction along the waist-shaped hole; A lifting cylinder is further arranged below the lifting plate, and the lifting plate and multiple sets of the welding positioning fixtures above it are driven by the lifting cylinder to lift in the vertical direction.

[0013] Preferably, an ear plate positioning block is further arranged on the side of each set of the welding positioning fixtures, and a positioning clamping groove is opened at the top of the ear plate positioning block. It lifts and lowers synchronously with the lifting plate to position the right-angle ear plate; The lifting plate is also provided with a conveying chain positioning block, which horizontally moves under the action of a cylinder to position the body of the conveying chain.

[0014] Preferably, a turning cylinder is arranged at one end of the welding workbench. The piston rod of the turning cylinder is connected to the central axis of the welding workbench through a crank. Under the action of the turning cylinder, the welding workbench is driven to turn, realizing the automatic blanking of the conveying chain. The tooling rack is also provided with a blanking baffle, which is obliquely arranged on the blanking side of the conveying chain.

[0015] The present invention also provides a use method of a conveying chain welding production line for a submerged scraper conveyor, including the following steps: Step A: Feeding. The conveying chain is placed along the length direction on the welding workbench of the first welding station and is preliminarily positioned through the positioning blocks on the welding workbench. Step B: Clamping and positioning the conveying chain. The lifting cylinder is started to drive the lifting plate and multiple groups of welding positioning jigs above it to rise vertically. At the same time, the ear plate positioning block and the conveying chain positioning block also rise through the positioning opening of the welding workbench. The positioning clamping groove of the ear plate positioning block directly clamps the corresponding right-angle ear plate, while the conveying chain positioning block horizontally moves under the action of the cylinder to position the body of the conveying chain. Step C: Clamping and positioning the reinforcing rib. The feeding cylinder is started to make the piston rod extend, contact and push the lower part of the movable claw to rotate around the middle rotating shaft. At the same time, the upper U-shaped clamp gradually opens. After the reinforcing rib is placed, the piston rod of the feeding cylinder retracts, and the movable claw rotates under the elastic force of the torsion spring to clamp and fix the reinforcing rib placed in the U-shaped clamp. Step D: Welding. The welding robot welds and fixes the reinforcing rib and the right-angle ear plate one by one along the length direction of the conveying chain. Step E: Meanwhile, the feeding operation is carried out on the welding workbench of the second welding station, realizing the alternating work of the welding robot on two groups of toolings. Step F: Blanking. After welding is completed, the lifting cylinder drives the lifting plate to descend to the initial position. At this time, the conveying chain on the welding workbench is released from the restraint. The turning cylinder is started, and the welding workbench is gradually tilted through the crank, so that the conveying chain slides towards the blanking baffle direction to complete blanking.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The welding positioning fixture in the welding tooling of the present invention can not only adjust the height of the welding positioning fixture in the vertical direction and rotate to adjust the angle around the central axis by screwing the adjusting screw, but also adjust the position of the welding positioning fixture in the horizontal direction along the waist-shaped hole, realizing multi-directional adjustment, so as to adapt to conveying chains of different lengths and right-angle chain plates at different angles, greatly improving the adaptability of the welding tooling in actual production; 2. The welding positioning fixture in the welding tooling of the present invention adopts elastic clamping. The movable jaw rotates under the elastic force of the torsion spring to clamp and fix the stiffener placed in the U-shaped jaw, avoiding the rotation of the stiffener during the clamping process; it saves 50% of the clamping time compared with ordinary clamping; 3. The welding production line for the conveying chain of the buried scraper conveyor of the present invention is equipped with a welding robot for two sets of welding tooling. The welding robot works alternately on the two sets of welding tooling, saving a large amount of time for the welding robot to wait for loading, positioning and clamping, and improving the welding efficiency. Description of the Drawings

[0017] Figure 1 is a schematic structural view of the conveying chain for the buried scraper conveyor; Figure 2 is a schematic structural view of a welding production line for the conveying chain of the buried scraper conveyor provided by the present invention; Figure 3 is a top view of a welding production line for the conveying chain of the buried scraper conveyor provided by the present invention; Figure 4 is a schematic structural view of the welding tooling provided by the present invention; Figure 5 is a front view of the welding tooling provided by the present invention; Figure 6 is a partial structural view of the welding tooling provided by the present invention; Figure 7 is a schematic structural view of the welding positioning fixture from the first perspective provided by the present invention; Figure 8 is a schematic structural view of the welding positioning fixture from the second perspective provided by the present invention; Figure 9 is a cross-section of the welding positioning fixture provided by the present invention; Figure 10 is a layout diagram of the welding positioning fixture, the ear plate positioning block and the conveying chain positioning block on the lifting plate provided by the present invention.

[0018] In the figure: 100, link; 200, right-angle ear plate; 300, reinforcing rib; 1, welding robot; 2, welding tooling; 201, tooling frame; 202, welding workbench; 3, welding positioning fixture; 301, ; 301, fixed jaw; 302, movable jaw; 303, middle rotating shaft; 304, torsion spring; 305, U-shaped jaw; 306, loading cylinder; 307, adjusting screw; 308, set screw; 4, lifting plate; 5, lifting cylinder; 6, ear plate positioning block; 7, conveying chain positioning block; 8, flipping cylinder; 9, crank; 10, conveying chain; 11, unloading baffle; 12, ; 13, . Detailed implementation manners

[0019] The following further detailed description of the present invention is made in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will be clearer according to the following description and the claims. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] In addition, the features, operations, and characteristics described in the specification can be combined in any suitable manner to form various embodiments. Similarly, the steps or actions described in the method can also be adjusted in order in a manner that can be easily seen by those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment and are not necessarily in such an order, unless it is stated otherwise that a certain order must be followed. Embodiment

[0023] As Figure 2 and 3 shown, the present invention provides a welding production line for a scraper conveyor chain, including a welding robot 1 and a welding fixture 2. Please refer to Figures 4 - 6 , the welding fixture 2 includes a fixture frame 201, on which a movable welding workbench 202 is installed, and the conveyor chain 10 to be welded is placed along the length direction on the welding workbench 202; below the welding workbench 202, a plurality of groups of welding positioning jigs 3 are provided, and the reinforcing rib 300 is clamped by the welding positioning jigs 3 and positioned on the right-angle ear plate 200 for the welding robot 1 to weld and fix the reinforcing rib 300 to the right-angle ear plate 200.

[0024] In this embodiment, two groups of the welding fixtures 2 are provided and arranged in parallel, and the welding robot 1 is arranged between the two groups of the welding fixtures 2 and can alternately weld the conveyor chains on the two groups of the welding fixtures 2.

[0025] Specifically, please refer to Figures 7 - 9 , the welding positioning jig 3 includes a fixed jaw 301 and a movable jaw 302, and the movable jaw 302 rotates relative to the fixed jaw 301 around a central rotating shaft 303.

[0026] Furthermore, a torsion spring 304 is also provided between the fixed jaw 301 and the movable jaw 302, and the elastic force of the torsion spring 304 is used to push the movable jaw 302 close to the fixed jaw 301 and clamp the reinforcing rib 300 placed between the two.

[0027] In this embodiment, the ends of the fixed jaw 301 and the movable jaw 302 are provided with symmetric arc-shaped grooves; when the fixed jaw 301 and the movable jaw 302 are combined, the two arc-shaped grooves form a U-shaped jaw 305, which can clamp the cylindrical reinforcing rib 300.

[0028] Further, a feeding cylinder 306 is provided at one end of the movable jaw 302 away from the U-shaped jaw 305. When the piston rod of the feeding cylinder 306 extends, it contacts and pushes the lower part of the movable jaw 302 to rotate around the middle rotating shaft 303, and at the same time, the upper U-shaped jaw 305 gradually opens to allow the reinforcing rib 300 to be placed therein. When the piston rod of the feeding cylinder 306 retracts, the movable jaw 302 rotates under the elastic force of the torsion spring 304 to clamp and fix the reinforcing rib 300 placed in the U-shaped jaw 305.

[0029] Further, an adjusting screw 307 is provided at the bottom of the fixed jaw 301. The adjusting screw 307 is threadedly connected to the fixed jaw 301. By screwing the adjusting screw 307, the height of the welding positioning jig 3 in the vertical direction and the angle of rotation around the central axis can be adjusted. A set screw 308 is also provided on the side wall of the fixed jaw 301. The set screw 308 vertically penetrates the fixed jaw 301 and contacts the adjusting screw 307 to lock the height of the welding positioning jig 3 in the vertical direction.

[0030] Specifically, as Figure 10 shown, multiple groups of the welding positioning jigs 3 are provided and are arranged at intervals on the lifting plate 4. Each group of the welding positioning jigs 3 corresponds to a right-angle ear plate 200 of the conveying chain 10 respectively. The welding positioning jig 3 is connected to the waist-shaped hole on the lifting plate 4 through the adjusting screw 307 and the locking nut, and the welding positioning jig 3 can adjust its position in the horizontal direction along the waist-shaped hole.

[0031] Further, a lifting cylinder 5 is also provided below the lifting plate 4. The lifting cylinder 5 drives the lifting plate 4 and multiple groups of the welding positioning jigs 3 above it to lift and lower in the vertical direction.

[0032] In this embodiment, an ear plate positioning block 6 is also provided on the side of each group of the welding positioning jigs 3. A positioning clamping groove is formed at the top of the ear plate positioning block 6, which lifts and lowers synchronously with the lifting plate 4 to position the right-angle ear plate 200. A conveying chain positioning block 7 is also provided on the lifting plate 4. The conveying chain positioning block 7 moves horizontally under the action of a cylinder to position the body of the conveying chain 10.

[0033] Specifically, please refer to Figure 4, a turning cylinder 8 is arranged at one end of the welding workbench 202. The piston rod of the turning cylinder 8 is connected to the central axis of the welding workbench 202 through a crank 9. Under the action of the turning cylinder 8, the welding workbench 202 is driven to turn, realizing the automatic blanking of the conveying chain 10; a blanking baffle 11 is further arranged on the workbench frame 201. The blanking baffle 11 is obliquely arranged on the blanking side of the conveying chain 10. Since the conveying line weighs dozens of kilograms, the blanking baffle 11 is needed to block the sliding conveying chain 10 so that it falls into the designated position.

[0034] The present invention also provides a use method of a conveying chain welding production line for a drag conveyor, including the following steps: Step A: Loading. The conveying chain 10 is placed on the welding workbench 202 of the first welding station along the length direction and is preliminarily positioned through the positioning blocks on the welding workbench 202. Step B: Clamping and positioning the conveying chain. The lifting cylinder 5 is started to drive the lifting plate 4 and multiple groups of welding positioning jigs 3 above it to rise vertically. At the same time, the ear plate positioning block 6 and the conveying chain positioning block 7 that also rise through the positioning opening of the welding workbench 202; the positioning clamping groove of the ear plate positioning block 6 directly clamps the corresponding right-angle ear plate 200, and the conveying chain positioning block 7 moves horizontally under the action of the cylinder to position the body of the conveying chain 10. Step C: Clamping and positioning the reinforcing rib. The feeding cylinder 306 is started so that the piston rod extends out, contacts and pushes the lower part of the movable claw 302 to rotate around the middle rotating shaft 303. At the same time, the upper U-shaped clamping jaw 305 gradually opens. After the reinforcing rib 300 is placed, the piston rod of the feeding cylinder 306 retracts, and the movable claw 302 rotates under the elastic force of the torsion spring 304 to clamp and fix the reinforcing rib 300 placed in the U-shaped clamping jaw 305. Step D: Welding. The welding robot 1 welds and fixes the reinforcing rib 300 and the right-angle ear plate 200 one by one along the length direction of the conveying chain. Step E: Meanwhile, the loading operation is carried out on the welding workbench 202 of the second welding station, realizing the alternating work of the welding robot 1 on the two groups of welding fixtures 2. Step F: Blanking. After welding is completed, the lifting cylinder 5 drives the lifting plate 4 to descend to the initial position. At this time, the conveying chain 10 on the welding workbench 202 is released from the constraint. The turning cylinder 8 is started, and the welding workbench 202 is gradually tilted through the crank 9, so that the conveying chain 10 slides towards the blanking baffle 11 to complete blanking.

[0035] This conveying chain welding production line is equipped with a welding robot for two groups of welding fixtures. The welding robot works alternately on the two groups of welding fixtures, saving a large amount of time for the welding robot to wait for loading, positioning and clamping, and improving the welding efficiency.

[0036] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention based on the above disclosure fall within the scope of protection of the claims.

Claims

1. A welding production line for a drag conveyor chain, comprising a welding robot (1) and a welding tooling (2), characterized in that ； The welding tooling (2) includes a tooling frame (201), on which a movable welding workbench (202) is installed, and the conveying chain (10) to be welded is placed on the welding workbench (202) along the length direction; Below the welding workbench (202), there are multiple groups of welding positioning jigs (3). The reinforcing rib (300) is clamped by the welding positioning jigs (3) and positioned on the right-angle ear plate (200), so that the welding robot (1) can weld and fix the reinforcing rib (300) to the right-angle ear plate (200).

2. The welding production line for the conveying chain of a scraper conveyor according to claim 1, wherein, There are two groups of the welding tooling (2), which are arranged in parallel, and the welding robot (1) is arranged between the two groups of the welding tooling (2), and can alternately weld the conveying chains on the two groups of the welding tooling (2).

3. A welding production line for the conveying chain of an en masse conveyor, characterized in that, The welding positioning jig (3) includes a fixed jaw (301) and a movable jaw (302), and the movable jaw (302) rotates relative to the fixed jaw (301) around the middle rotating shaft (303); A torsion spring (304) is also arranged between the fixed jaw (301) and the movable jaw (302). The elastic force of the torsion spring (304) is used to push the movable jaw (302) close to the fixed jaw (301) and clamp the reinforcing rib (300) placed between the two.

4. A welding production line for a drag conveyor chain as described in claim 3, characterized in that Symmetrical arc grooves are provided at the ends of the fixed jaw (301) and the movable jaw (302); when the fixed jaw (301) and the movable jaw (302) are combined, the two arc grooves form a U-shaped jaw (305), which can clamp the cylindrical reinforcing rib (300).

5. The welding production line for the conveying chain of an en masse conveyor according to claim 4, wherein, One end of the movable jaw (302) far from the U-shaped jaw (305) is provided with a feeding cylinder (306). When the piston rod of the feeding cylinder (306) extends, it contacts and pushes the lower part of the movable jaw (302) to rotate around the middle rotating shaft (303), and at the same time, the upper U-shaped jaw (305) gradually opens to allow the reinforcing rib (300) to be placed; when the piston rod of the feeding cylinder (306) retracts, the movable jaw (302) rotates under the elastic force of the torsion spring (304) to clamp and fix the reinforcing rib (300) placed in the U-shaped jaw (305).

6. The welding production line for the conveying chain of an en-masse conveyor according to claim 3, characterized in that, An adjusting screw (307) is provided at the bottom of the fixed jaw (301), and the adjusting screw (307) is threadedly connected with the fixed jaw (301). By screwing the adjusting screw (307), the height of the welding positioning jig (3) in the vertical direction and the rotation angle around the central axis can be adjusted; A set screw (308) is also provided on the side wall of the fixed jaw (301). The set screw (308) vertically penetrates the fixed jaw (301) and contacts the adjusting screw (307), so as to lock the height of the welding positioning jig (3) in the vertical direction.

7. The welding production line for the conveying chain of an en-masse conveyor according to claim 6, characterized in that, There are multiple groups of the welding positioning jigs (3), which are arranged at intervals on the lifting plate (4), and each group of the welding positioning jigs (3) corresponds to a right-angle ear plate (200) of the conveying chain (10); The welding positioning fixture (3) is connected to the waist-shaped hole on the lifting plate (4) through an adjusting screw (307) and a locking nut, and the welding positioning fixture (3) can adjust its position in the horizontal direction along the waist-shaped hole. A lifting cylinder (5) is further provided below the lifting plate (4), and the lifting cylinder (5) drives the lifting plate (4) and multiple groups of the welding positioning fixtures (3) above it to lift and lower in the vertical direction.

8. The welding production line for the conveying chain of an en-masse conveyor as claimed in claim 7, wherein, An ear plate positioning block (6) is further provided on the side of each group of the welding positioning fixtures (3). A positioning clamping groove is formed at the top of the ear plate positioning block (6), which lifts and lowers synchronously with the lifting plate (4) to position the right-angle ear plate (200). A conveying chain positioning block (7) is further provided on the lifting plate (4), and the conveying chain positioning block (7) moves horizontally under the action of a cylinder to position the body of the conveying chain (10).

9. The welding production line for the conveyor chain used in the scraper conveyor according to claim 1, characterized in that A flipping cylinder (8) is provided at one end of the welding workbench (202). The piston rod of the flipping cylinder (8) is connected to the central axis of the welding workbench (202) through a crank (9). Under the action of the flipping cylinder (8), the welding workbench (202) is driven to flip, realizing the automatic blanking of the conveying chain (10). A blanking baffle (11) is further provided on the tooling rack (201), and the blanking baffle (11) is inclined and arranged on the blanking side of the conveying chain (10).

10. A method of using a welding production line for a conveying chain of an en masse conveyor, characterized in that, It includes the following steps: Step A: Loading. The conveying chain (10) is placed on the welding workbench (202) at the first welding station along its length direction, and is preliminarily positioned through the positioning blocks on the welding workbench (202). Step B: Clamping and positioning the conveying chain. The lifting cylinder (5) is started to drive the lifting plate (4) and multiple groups of the welding positioning fixtures (3) above it to rise in the vertical direction. At the same time, the ear plate positioning block (6) and the conveying chain positioning block (7) also rise through the positioning opening of the welding workbench (202). The positioning clamping groove of the ear plate positioning block (6) directly clamps the corresponding right-angle ear plate (200), and the conveying chain positioning block (7) moves horizontally under the action of a cylinder to position the body of the conveying chain (10). Step C: Clamping and positioning the reinforcing rib. The feeding cylinder (306) is started to make the piston rod extend, contact and push the lower part of the movable jaw (302) to rotate around the middle rotating shaft (303). At the same time, the upper U-shaped clamping jaw (305) gradually opens. After the reinforcing rib (300) is placed, the piston rod of the feeding cylinder (306) retracts, and the movable jaw (302) rotates under the elastic force of the torsion spring (304) to clamp and fix the reinforcing rib (300) placed in the U-shaped clamping jaw (305). Step D: Welding. The welding robot (1) welds and fixes the reinforcing rib (300) and the right-angle ear plate (200) one by one along the length direction of the conveying chain. Step E: At the same time, the loading operation is carried out on the welding workbench (202) at the second welding station, realizing the alternating work of the welding robot (1) on the two groups of welding toolings (2). Step F: Material discharging. After welding is completed, the lifting cylinder (5) drives the lifting plate (4) to descend to the initial position. At this time, the conveyor chain (10) on the welding workbench (202) is released from restraint. Then, the tipping cylinder (8) is started, and the welding workbench (202) is gradually tilted by the crank (9), causing the conveyor chain (10) to slide towards the material discharging baffle (11) to complete material discharging.

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