A link scraper welding device and method

Abstract

The application provides a chain link and scraper welding device which can meet the functional requirements and precision requirements when a welding robot welds. The device places the to-be-welded chain link on the chain link base, and the upward U-shaped opening of the articulated joint of the to-be-welded chain link is positioned in the chain link positioning groove. The plate body of the to-be-welded scraper is placed in the scraper positioning groove in the scraper support platform. The to-be-welded chain link and the to-be-welded scraper are placed in the welding position through the chain link base and the scraper support platform. The number of chain link positioning grooves and the number of scraper positioning grooves are adapted to the welding range of the welding robot. The horizontal edge of the Г-shaped pressing plate is pressed on the to-be-welded scraper, and the vertical edge is pressed against the end of the other end of the to-be-welded scraper. The Г-shaped pressing plate is pressed tightly based on the cam pressing device, the positioning of the chain link and the scraper is completed, and it is ensured that all the scrapers and the chain link welding fillet are in a straight line, so that the functional requirements and the precision requirements when the welding robot welds are met. Meanwhile, the application also provides a chain link and scraper welding method.

Description

Technical Field

[0001] This invention relates to the field of scraper conveyor technology, specifically to a chain link scraper welding device and method. Background Technology

[0002] In the field of scraper conveyor equipment, sprockets are typically used to drive chain-link scrapers to convey materials. Specifically, applications CN201110292335.1 and CN201920209264.6 disclose methods such as... Figure 1 The shown is a chain link scraper. This chain link scraper includes a chain link a1 and a scraper a2. Two scrapers a2 are symmetrically mounted on both sides of the chain link a1. The chain link a1 includes a U-shaped hinge lug a3 and a hinge joint a4. Adjacent chain links a1 are hinged together by a pin or similar structure. The chain link a1 and scraper a2 are fixed by welding. The traditional welding process for the chain link a1 and scraper a2 is as follows: after placing the chain link a1 and scraper a2 on a welding bracket, tack weld the chain link a1 and scraper a2 to fix them, and then manually weld the connecting fillet welds between the chain link a1 and scraper a2. Each scraper a2 has two fillet welds a5 on the assembly welding surface with the chain link a1.

[0003] However, with the application of welding robots in production, traditional equipment such as welding brackets that fix two parts by spot welding and then weld the fillet weld can no longer meet the precision requirements of welding robots, nor can they meet the functional requirements of welding robots to complete welding. Summary of the Invention

[0004] To address the issue that traditional welding brackets and other equipment used for spot welding followed by general welding cannot meet the functional and precision requirements of welding robots, this invention provides a chain link scraper welding device that can meet the functional and precision requirements of welding robots. This application also provides a chain link scraper welding method.

[0005] The technical solution of the present invention is as follows: a chain link scraper welding device, characterized in that it includes: a bracket, a chain link base, a scraper support platform, a Г-shaped pressure plate and a cam pressing device;

[0006] The link base is provided with a link positioning groove, the shape and size of which are adapted to the shape and size of the U-shaped cavity of the hinge lug of the link to be welded.

[0007] The scraper support platform is provided with a scraper positioning groove, the shape of which is adapted to the scraper body to be welded; the depth of the scraper positioning groove is less than the thickness of the scraper body to be welded, and the length of the scraper positioning groove is less than the length of the scraper body to be welded.

[0008] The chain link base is mounted on the bracket, the scraper support platform is mounted on the chain link base, and the two scraper support platforms are symmetrically and parallelly arranged on both sides of the chain link base with the scraper positioning groove facing upward.

[0009] The Г-shaped pressure plate is movably placed above the scraper positioning groove of the scraper support platform;

[0010] On the side of each scraper support platform away from the chain link base shown, a clamping device mounting bracket is respectively provided; the cam clamping device is mounted on the clamping device mounting bracket and is arranged parallel to the Г-shaped clamping plate;

[0011] The number of link positioning slots on the link base and the number of scraper positioning slots on each scraper support platform are adapted to the welding range of the welding robot.

[0012] Its further features are:

[0013] The distance between the bottom end face of the horizontal side of the Г-shaped pressure plate and the bottom of the scraper positioning groove is equal to the thickness of the scraper body to be welded, and the distance between the vertical side of the Г-shaped pressure plate and the side wall of the chain link to be welded is equal to the length of the scraper body to be welded.

[0014] Limiting plates are respectively provided on the two side walls of the chain link base; one side of the limiting plate is fixedly connected to the chain link base, and the other side is connected to the scraper support platform based on a detachable connection structure;

[0015] It also includes: pressure plate positioning block, compression spring and pressure plate positioning bolt;

[0016] A pressure plate positioning block is provided below the vertical edge of the Г-shaped pressure plate; the scraper support platform has a U-shaped structure, with a pressure plate positioning groove provided on the horizontal edge of the scraper support platform and threaded holes provided on the vertical side plate; the Г-shaped pressure plate is placed on the upper surface of the scraper support platform, the pressure plate positioning block is placed in the pressure plate positioning groove, and the pressure plate positioning bolt passes through the positioning hole of the pressure plate positioning block and the threaded hole of the vertical side plate of the platform in sequence to connect the Г-shaped pressure plate and the scraper support platform;

[0017] The compression spring is fitted onto the positioning bolt of the pressure plate, with both ends of the spring pressing against the positioning block of the pressure plate and the platform mounting plate, respectively.

[0018] The cam clamping device includes: a rotating shaft and a clamping cam, the clamping cam being fixed on the rotating shaft, and the clamping head of the clamping cam having an arc surface; one end of the rotating shaft is connected to a driving device;

[0019] The clamping device mounting bracket is provided with mounting holes, the center line of which is lower than the upper end face of the Г-shaped pressure plate; the rotating shaft of the cam clamping device is installed in the mounting holes;

[0020] It also includes: base hinge;

[0021] The two ends of the link base along its length are respectively provided with base pivots, and the two base pivots are located on the center line of the link base; the base pivots are mounted on the bracket;

[0022] It also includes: a base positioning bolt; positioning screw holes are respectively provided on the bracket and the chain link base, and the base positioning bolt passes through the positioning screw holes on the bracket and the chain link base in sequence.

[0023] A method for welding chain link scrapers, characterized by comprising the following steps:

[0024] S1: With the hinge facing upwards, place the chain link to be welded in the chain link positioning groove on the chain link base with the U-shaped opening facing downwards;

[0025] S2: Place the scraper body to be welded into the scraper positioning groove on the scraper support platform;

[0026] S3: Based on the clamping cam in the cam clamping device, the Г-shaped clamping plate is pushed forward, so that the welding end of the scraper to be welded is pressed on the welding surface of the chain link assembly, and the Г-shaped clamping plate is pressed downward by its horizontal edge to clamp the scraper.

[0027] S4: Fix the chain link base to the bracket using the base positioning bolts; start the welding robot to weld the fillet welds of each scraper and chain link one by one;

[0028] S5: After all the fillet welds on all the chain links to be welded have been completed, stop the welding robot;

[0029] S6: Unscrew the base positioning bolts on the chain link base from the bracket, rotate the welding device 180 degrees, tighten the base positioning bolts, and then fix the chain link base and the bracket.

[0030] S7: Start the welding robot to weld the fillet weld between the scraper and the chain link on the other side;

[0031] Complete the welding of the chain link to be welded to the scraper to be welded.

[0032] This application provides a chain link scraper welding device. The chain link to be welded is placed on a chain link base, with the U-shaped opening of the chain link's hinge facing upwards positioned in a chain link positioning groove. The scraper body is placed in a scraper positioning groove within a scraper support platform. The chain link and scraper are positioned for welding using the chain link base and scraper support platform. The number of chain link positioning grooves and scraper positioning grooves is matched to the welding range of the welding robot, meeting the functional requirements for welding using the robot. A Г-shaped pressure plate presses its horizontal edge against the scraper and its vertical edge against the other end of the scraper. A cam-type clamping device presses the Г-shaped pressure plate, completing the positioning of the chain link and scraper, ensuring that all scraper and chain link fillet welds are in a straight line, meeting the precision requirements of the welding robot. Welding using this chain link scraper welding device, which positions the chain link and scraper via the chain link base and scraper support platform, eliminates the spot welding process between the chain link and scraper, directly welding fillet welds and significantly improving production efficiency. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the scraper chain link to be welded;

[0034] Figure 2 This is a three-dimensional structural schematic diagram of the chain link scraper welding device in this application;

[0035] Figure 3 This is an exploded view of the chain link scraper welding device in this application;

[0036] Figure 4 for Figure 2 Enlarged structural diagram of point A in the middle;

[0037] Figure 5 This is a side view of the support structure of the chain link scraper welding device. Detailed Implementation

[0038] like Figures 2-5 As shown, this application includes a chain link scraper welding device, characterized in that it includes: a cam pressing device 1, a Г-shaped pressing plate 2, a scraper support platform 3, and a chain link base 4.

[0039] A link positioning groove 9 is provided on the link base 4. The shape and size of the link positioning groove 9 are adapted to the shape and size of the U-shaped cavity of the hinge ear a3 of the link to be welded.

[0040] The scraper support platform 3 is provided with a scraper positioning groove 8. The shape of the scraper positioning groove 8 is adapted to the body of the scraper a2 to be welded. The depth of the scraper positioning groove 8 is less than the thickness of the scraper a2 to be welded, and the length of the scraper positioning groove 8 is less than the length of the scraper a2 to be welded.

[0041] The chain link base 4 is mounted on the bracket 10, and the scraper support platform 3 is mounted on the chain link base 4. The two scraper support platforms 3 are symmetrically and parallelly arranged on both sides of the chain link base 4 with the scraper positioning groove 8 facing upward.

[0042] The scraper support platform 3 has an overall U-shaped structure, and limiting plates 4-2 are provided on both side walls of the chain link base 4. One side of the limiting plate 4-2 is fixedly connected to the chain link base 4, and the other side is connected to the scraper support platform 3 through a detachable connection structure. In this application, the scraper support platform 3 and the limiting plate 4-2 are connected by bolts. The size of the welding space between the chain link base 4 and the scraper support platform 3 is controlled by the limiting plate 4-2 to ensure that the requirements of robotic welding can be met.

[0043] The Г-shaped pressure plate 2 is movably placed above the scraper positioning groove 8 in the scraper support platform 3. The distance between the bottom end face of the horizontal side of the Г-shaped pressure plate 2 and the bottom of the scraper positioning groove 8 is equal to the thickness of the scraper a2 to be welded. The distance between the vertical side of the Г-shaped pressure plate 2 and the side wall of the chain link to be welded is equal to the length of the scraper a2 to be welded.

[0044] The Г-shaped pressure plate in this application is used to position and press the scraper on the scraper support platform to ensure that the scraper to be welded is in a straight line with the fillet weld of the chain link.

[0045] On the side of each scraper support platform 3 away from the chain link base 4 shown, a clamping device mounting bracket 7 is respectively provided.

[0046] In specific implementation, mounting holes are provided on the mounting support 7 of the clamping device, and the center line of the mounting holes is lower than the upper end face of the Г-shaped pressure plate 2; the cam clamping device 1 is installed in the mounting holes and is set parallel to the Г-shaped pressure plate 2 to ensure that when the clamping cam 1-2 rotates to the Г-shaped pressure plate 2, it can apply force to the Г-shaped pressure plate 2 from the oblique top and clamp the Г-shaped pressure plate 2.

[0047] The structure of the cam pressing device 1 in this embodiment is as follows: Figure 2 , 3 As shown in Figure 5, the cam clamping device 1 includes: a rotating shaft 1-1 and a clamping cam 1-2. The clamping cam 1-2 is fixed on the rotating shaft 1-1, and the clamping head of the clamping cam 1-2 is an arc surface. One end of the rotating shaft 1-1 is connected to a rotating drive device (not marked in the figure).

[0048] After being installed on support 7, when the top of clamping cam 1-2 is placed horizontally, it will slightly exceed the horizontal distance between rotating shaft 1-1 and Г-shaped pressure plate 2. Because the clamping head of clamping cam 1-2 is an arc surface, as rotating shaft 1-1 rotates towards Г-shaped pressure plate 2, the arc surface of the clamping head will gradually press the side wall of Г-shaped pressure plate 2 from top to bottom until it presses Г-shaped pressure plate 2 tightly from the side and above. In the welding state, because the distance between the bottom surface of the horizontal edge of Г-shaped pressure plate 2 and the bottom of the scraper positioning groove 8 is equal to the thickness of the scraper a2 to be welded, and the distance between the vertical edge of Г-shaped pressure plate 2 and the side wall of the link to be welded is equal to the length of the scraper a2 to be welded, the Г-shaped pressure plate 2, which is subjected to force from the upper side, simultaneously presses the scraper to be welded on the scraper support platform 3 from above and the right side, thus completing the positioning of the scraper to be welded.

[0049] In this application, the cams on both sides of the cam clamping device drive the Г-shaped pressure plates on both sides. The inner vertical surface of the Г-shaped pressure plate pushes the scraper of the scraper platform to the welding surface of the chain link assembly. The clamping force when the cam rotates from top to bottom makes the outer edge of the horizontal surface of the Г-shaped pressure plate press against the upper surface of all scrapers, ensuring that the weld fillet and weld seam of the scraper and the chain link are in the same straight line, thus meeting the precision requirements of the welding robot.

[0050] To ensure accurate positioning between the Г-shaped pressure plate 2 and the scraper support platform 3, this application uses the pressure plate positioning groove 3-2 to determine the position of the Г-shaped pressure plate 2, and connects the Г-shaped pressure plate 2 and the scraper support platform 3 using pressure plate positioning bolts 6. This ensures that the Г-shaped pressure plate 2 does not change position during the clamping process by the clamping cam 1-2. Simultaneously, to ensure that the scraper to be welded is not damaged during welding, this application includes a cylindrical compression spring 5 on the pressure plate positioning bolt 6 to support the Г-shaped pressure plate 2 and buffer the pressure on the vertical side of the Г-shaped pressure plate 2.

[0051] like Figure 3 and Figure 4 As shown, a pressure plate positioning block 2-1 is provided below the vertical edge of the Г-shaped pressure plate 2. The pressure plate positioning block 2-1 is provided with a positioning hole, the diameter of which is larger than the diameter of the pressure plate positioning bolt. A pressure plate positioning groove 3-2 is provided on the horizontal edge of the U-shaped scraper support platform 3. A threaded hole is provided on the vertical side plate 3-1 of the scraper support platform 3. The threaded hole is coaxial with the positioning hole on the positioning block. When installing the Г-shaped pressure plate 2, the Г-shaped pressure plate 2 is placed on the upper surface of the scraper support platform. Each pressure plate positioning block 2-1 is placed in a pressure plate positioning groove 3-2. The pressure plate positioning bolt 6 passes through the positioning hole of the pressure plate positioning block 2-1 and the threaded hole of the vertical side plate 3-1 of the platform in sequence to connect the Г-shaped pressure plate 2 and the scraper support platform 3.

[0052] A cylindrical compression spring 5 is mounted on the pressure plate positioning bolt 6, with both ends of the spring pressing against the pressure plate positioning block 2-1 and the vertical side plate 3-1 of the scraper support platform, respectively. In this application, a cylindrical compression spring 5 is provided on the pressure plate positioning bolt 6. During the process of the Г-shaped pressure plate 2 being pressed by the pressing cam 1-2, the cylindrical compression spring 5 buffers the pressure on the scraper to be welded in the horizontal direction. After the cam pressing force is released, the cylindrical compression spring 5 opens the Г-shaped pressure plate 2, which facilitates the scraper loading.

[0053] The number of link positioning slots 9 on the link base 4 and the number of scraper positioning slots 8 on each scraper support platform 3 are adapted to the welding range of the welding robot. This ensures that multiple link and scraper welding operations can be completed in one welding process.

[0054] In order to meet the welding requirements of the two fillet welds on both sides of each chain link and scraper to be welded, a base shaft 4-1 is also provided in this device.

[0055] A base shaft 4-1 is provided at both ends of the chain link base 4 along its length, and the two base shafts 4-1 are located on the center line of the chain link base 4. The shaft head of the base shaft 4-1 is rotatably installed in the mounting hole of the bracket 10 based on existing technology. The output end of the rotation drive device (not marked in the figure) is connected to one of the base shafts 4-1. The base shaft 4-1 is used to reverse the chain link base 4, the scraper support platform 3, the scraper to be welded and the chain link to be welded positioned in the device, which are already fixed in position on the bracket 10, so as to realize the welding of the fillet weld on the other side.

[0056] To ensure the stability of the device during welding, this application provides a base positioning bolt 11; positioning screw holes are respectively provided on the bracket 10 and the chain link base 4, and the base positioning bolt 11 passes through the positioning screw holes on the bracket 10 and the chain link base 4 in sequence to fix the relative position between the bracket 10 and the chain link base 4, so as to ensure that the position of the chain link and chain plate to be welded is stable during the welding process and meets the welding accuracy requirements.

[0057] The chain link scraper welding method based on the above welding device specifically includes the following steps.

[0058] S1: With the hinge facing upwards, place the chain link to be welded in the chain link positioning groove 9 on the chain link base 4 with the U-shaped opening facing downwards;

[0059] S2: Install the scraper support platform 3 symmetrically on both sides of the chain link base 4, and fasten the two together with bolts;

[0060] Place the scraper a2 to be welded into the scraper positioning groove 8 in the scraper support platform 3.

[0061] S3: Install the Г-shaped pressure plate 2 symmetrically on the upper plane of the scraper support platform 3.

[0062] Press the horizontal edge of the Г-shaped pressure plate 2 onto the scraper a2 to be welded, and press the vertical edge against the end of the other end of the scraper a2 to be welded;

[0063] At both ends of the Г-shaped pressure plate 2, the pressure plate positioning bolts 6 and cylindrical compression springs 5 ​​are used to position the Г-shaped pressure plate on the scraper support platform 3.

[0064] Install the cam clamping device 1 into the clamping device mounting bracket 7, adjust the position and size of the cam on the cam clamping device 1 and the Г-shaped pressure plate 3, and then tighten the bracket 7 with bolts.

[0065] The cam clamping device 1 clamps the Г-shaped pressure plate 2, so that the end face of the scraper a2 to be welded is pressed against the welding surface of the chain link assembly;

[0066] S4: The two ends of the chain link base 4 are fitted with brackets 10, and screws 11 are screwed on the brackets 10 to fix the chain link base 4.

[0067] Start the welding robot to weld each scraper a2 to be welded to the fillet weld above the chain link to be welded.

[0068] S5: After all the fillet welds on the chain links to be welded have been completed, stop the welding robot.

[0069] S6: Unscrew the base positioning bolt 11 on the chain link base 4 from the bracket 10. After rotating the welding device that fixes the chain link to be welded and the scraper to be welded by 180 degrees based on the base shaft 4-1, screw the chain link base 4 and the bracket 10 in with the positioning bolt 11 to fix them.

[0070] S7: Start the welding robot to weld the fillet weld between each scraper a2 to be welded and the other side of the chain link to be welded;

[0071] Complete the welding of the chain link to be welded to the scraper a2 to be welded.

[0072] This application utilizes the base pivot on the chain link base to rotate the welding device. After welding one side of the fillet weld, the base positioning bolts are loosened, and the welding device is rotated 180° to weld the other side of the fillet weld, eliminating the need to re-clamp the chain link scraper and improving production efficiency.

[0073] By using the technical solution of this invention, the spot welding process between the chain links and the scraper is eliminated. The length of the welding device platform is set according to the welding range of the welding robot, and multiple chain links and scrapers can be clamped at one time to directly weld fillet welds. This not only ensures welding accuracy but also greatly improves production efficiency.

Claims

1. A chain link flight welding apparatus characterized by, It includes: Support, chain link base, scraper support platform, Г type pressing plate and cam pressing device; The chain link base is provided with a chain link positioning groove, the shape and size of the chain link positioning groove are matched with the shape and size of the U-shaped opening inner cavity of the hinge ear of the chain link to be welded; The scraper support platform is provided with a scraper positioning groove, the shape of the scraper positioning groove is matched with the plate body of the scraper to be welded; the depth of the scraper positioning groove is less than the thickness of the plate body of the scraper to be welded, and the length of the scraper positioning groove is less than the length of the plate body of the scraper to be welded; The chain link base is installed on the support, the scraper support platform is installed on the chain link base, and the two scraper support platforms are symmetrically and parallelly arranged on the two sides of the chain link base in the upward manner of the scraper positioning groove; The Г type pressing plate is movably placed above the scraper positioning groove of the scraper support platform; A pressing device mounting support is arranged on the side of each scraper support platform away from the chain link base; the cam pressing device is mounted on the pressing device mounting support and is arranged in parallel with the Г type pressing plate; The number of the chain link positioning grooves on the chain link base and the number of the scraper positioning grooves on each scraper support platform are matched with the welding range of the welding robot; The cam pressing device comprises a rotating shaft and a pressing cam, the pressing cam is fixed on the rotating shaft, and the pressing head of the pressing cam is a circular arc surface; one end of the rotating shaft is connected with a driving device; An installation hole is arranged on the pressing device mounting support, and the center line position of the installation hole is lower than the upper end surface of the Г type pressing plate; the rotating shaft of the cam pressing device is installed in the installation hole; When the top end of the pressing cam is horizontally placed, it will slightly exceed the horizontal distance between the rotating shaft and the Г type pressing plate, the pressing head of the pressing cam is a circular arc surface, and during the rotating process of the rotating shaft towards the Г type pressing plate, the circular arc surface of the pressing head will gradually press the side wall of the Г type pressing plate from top to bottom until the Г type pressing plate is tightly pressed from the side above; Pressing plate positioning block, compression spring and pressing plate positioning bolt; A pressing plate positioning block is arranged below the vertical edge of the Г type pressing plate; the scraper support platform is a ф-shaped structure, a pressing plate positioning groove is arranged on the horizontal edge of the scraper support platform, and a threaded hole is arranged on the vertical side plate; the Г type pressing plate is placed on the plane of the scraper support platform, the pressing plate positioning block is placed in the pressing plate positioning groove, the pressing plate positioning bolt passes through the positioning hole of the pressing plate positioning block and the threaded hole of the vertical side plate of the platform in sequence, and the Г type pressing plate and the scraper support platform are connected; The compression spring is sleeved on the pressing plate positioning bolt, and the two ends of the spring are respectively abutted against the pressing plate positioning block and the vertical side plate of the scraper support platform.

2. The chain link scraper blade welding apparatus of claim 1 wherein: The distance between the bottom end surface of the horizontal edge of the Г type pressing plate and the groove bottom of the scraper positioning groove is equal to the thickness of the plate body of the scraper to be welded, and the distance between the vertical edge of the Г type pressing plate and the side wall of the chain link to be welded is equal to the length of the plate body of the scraper to be welded.

3. The chain link scraper blade welding apparatus of claim 1 wherein: Limiting plates are arranged on the side walls of the two sides of the chain link base respectively; one side of the limiting plate is fixedly connected with the chain link base, and the other side is connected with the scraper support platform based on a detachable connecting structure.

4. The chain link scraper blade welding apparatus of claim 1 wherein: It further includes a base rotating shaft; The two ends of the length direction of the chain link base are respectively provided with base rotating shafts, and the two base rotating shafts are located on the center line of the chain link base.

5. The chain link scraper blade welding apparatus of claim 1 wherein: The base positioning bolt is arranged on the support and the chain link base.

6. A chain link scraper blade welding method employing the chain link scraper blade welding apparatus as claimed in claim 5, characterized by, It comprises the following steps: S1: in the way of the upward hinge joint, the U-shaped opening downward of the chain link to be welded is placed in the chain link positioning slot on the chain link base; S2: the plate body of the blade to be welded is placed in the blade positioning slot on the blade support platform; S3: based on the pressing cam in the cam pressing device, the Г-shaped pressing plate is pushed forward, so that the welding end of the blade to be welded is pressed on the chain link assembly welding surface, and the Г-shaped pressing plate is pressed downward by using the horizontal edge of the Г-shaped pressing plate; S4: the chain link base is fixed on the support by the base positioning bolt; the welding robot is started, and the fillet welds of each blade to be welded and the chain link are welded one by one; S5: after all the fillet welds on the chain link to be welded are welded, the welding robot is stopped; S6: the base positioning bolt on the chain link base is screwed out of the support, the rotating welding device is rotated by 180 degrees, the base positioning bolt is tightened, and the chain link base and the support are fixed; S7: the welding robot is started, and the fillet welds of the blade to be welded and the chain link to be welded on the other side are welded; The welding of the chain link to be welded and the blade to be welded is completed.

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