Metal welding device and process for bearing structure of coal mining machine

Abstract

The present application discloses a metal welding device and process for a load-bearing structure of a coal mining machine, relating to the field of metal welding. The device comprises a base, a support platform for supporting the load-bearing structure provided on the base, a plurality of first and second support wheels distributed on the surface of the support platform, the rotation axis directions of the first support wheels and the rotation axis directions of the second support wheels being both horizontal and perpendicular to each other, and all the first support wheels being synchronously raised and lowered on the support platform; a centering assembly for centering the load-bearing structure is also provided on the support platform, a welding gun is provided on the upper side of the base located on the support platform, and a driving assembly for driving the welding gun to move with multiple degrees of freedom is provided on the base; the centering assembly comprises two first clamping plates and two second clamping plates, the two first clamping plates being synchronously slidably provided on the support platform, and the two second clamping plates being synchronously slidably provided on the support platform. The present application helps to improve welding quality and ensure the structural strength of the load-bearing structure.

Description

Technical Field

[0001] The present application relates to the field of metal welding, and in particular to a metal welding device and process for a bearing structure of a coal mining machine. Background Art

[0002] Reference Figure 1 The load-bearing structure 50 of the coal mining machine includes a structural box 60 and an upper steel plate 70. A vertical steel plate 601 is also provided in the structural box 60. In practice, the upper steel plate 70 will be welded together with the vertical steel plate 601 in the structural box 60. A plurality of welding grooves 701 will be opened on the upper steel plate 70. The welding blocks on the vertical steel plate 601 pass through the welding grooves 701 and are then welded and fixed at the welding grooves 701.

[0003] Since the load-bearing structure is the main load-bearing component of the coal mining machine, its structural strength requirements are very high. At present, the direct welding of the vertical steel plate and the upper steel plate is usually performed by welders holding welding guns. Welders will feel work fatigue if they hold the welding guns for a long time. At this time, the welding position of the welding gun will be offset, which will lead to a decrease in welding quality, affect the connection strength between the vertical steel plate and the upper steel plate, and thus affect the structural strength of the load-bearing structure. Summary of the Invention

[0004] In order to improve welding quality and ensure the structural strength of the load-bearing structure, the present application provides a metal welding device and process for the load-bearing structure of a coal mining machine.

[0005] The metal welding device and process for the bearing structure of a coal mining machine provided in this application adopt the following technical solutions:

[0006] A metal welding device for a load-bearing structure of a coal mining machine includes a base, a supporting platform for supporting the load-bearing structure is provided on the base, a plurality of first supporting wheels and a second supporting wheel are distributed on the surface of the supporting platform, the rotation axis direction of the first supporting wheel and the rotation axis of the second supporting wheel are both horizontal and perpendicular to each other, and all the first supporting wheels are synchronously lifted and lowered on the supporting platform; a centering component for centering the load-bearing structure is also provided on the supporting platform, a welding gun is provided on the upper side of the base located on the supporting platform, and a driving component for driving the welding gun to move with multiple degrees of freedom is provided on the base; the centering component includes two first clamping plates and two second clamping plates, the two first clamping plates are distributed along the X direction, the length direction of the first clamping plates is along the Y direction, the two first clamping plates are synchronously slidably arranged on the supporting platform, the two second clamping plates are distributed along the Y direction, the length direction of the second clamping plates is along the X direction, the two second clamping plates are synchronously slidably arranged on the supporting platform, and the X direction and the Y direction are both horizontal and perpendicular to each other.

[0007] By adopting the above technical solution, the load-bearing structure is hoisted onto the supporting platform. At this time, all the first supporting wheels support the load-bearing structure, and the two first clamping plates move toward each other synchronously. The first clamping plates gradually contact the sides of the structural box until the load-bearing structure is driven to move to the middle position, thereby realizing the centering of the load-bearing structure in the X direction. Subsequently, the two second clamping plates slide synchronously to realize the centering of the load-bearing structure in the Y direction. After that, the driving assembly drives the welding gun to move, and welding operations can be performed at the welding groove. In this way, compared with manual welding, the welding gun can always perform welding operations stably, which helps to improve welding quality and ensure the structural strength of the load-bearing structure. In addition, due to the large weight of the load-bearing structure, when the load-bearing structure is hoisted to the supporting platform, the welding gun can be driven to move to the supporting platform. On the platform, it is difficult for the staff to manually center the structure, and there will be certain errors after centering, which will eventually lead to deviations in the welding position of the welding gun; the first supporting wheel first supports the load-bearing structure. At this time, during the centering process of the first clamping plate, the load-bearing structure is driven to move. The support of the load-bearing structure by the first supporting wheel facilitates the movement of the load-bearing structure; when the two first clamping plates are centered, the first supporting wheel descends. At this time, the second supporting wheel supports the load-bearing structure. Then, the two second clamping plates are centered and drive the load-bearing structure to move. The load-bearing structure can move on the second supporting wheel until the centering is completed. The support of the load-bearing structure by the first supporting wheel and the second supporting wheel reduces the friction between the load-bearing structure and the load-bearing structure, which facilitates the movement of the load-bearing structure.

[0008] Preferably, a receiving slot is provided in the supporting platform, and a lifting plate is provided for lifting the supporting platform in the receiving slot, and all the first supporting wheels are rotatably connected to the lifting plate, and four guide columns are vertically provided in the supporting platform in the receiving slot, and the four corners of the lifting plate are plugged and slidably matched with the four guide columns; a vertical column is provided on the lower side of the lifting plate, and there are two vertical columns, which are distributed on both sides of the lifting plate, and a linkage column is provided on the lower side of the supporting platform through a torsion spring rotation, and there are two linkage columns and they correspond one to one with the two vertical columns, and the upper end of the linkage column extends into the receiving slot, and the linkage column is provided with a plurality of vertical columns. A lifting slot is provided, and the vertical column is plugged into the lifting slot of the corresponding linkage column. The linkage column is located in the lifting slot and is provided with a return spring. The return spring is vertically arranged, and one end of the return spring abuts against the bottom wall of the lifting slot, and the other end of the return spring is connected to the vertical column. The linkage column is located on the inner wall of the lifting slot and is provided with a locking pin. An L-shaped slot is provided on the outer wall of the vertical column, and the L-shaped slot consists of a horizontal part and a vertical part. The locking pin is plugged into the L-shaped slot and forms a sliding fit. A driving part that drives the linkage column to rotate is provided on the lower side of the supporting platform. In the initial state, the locking pin is located at the horizontal part.

[0009] The first support wheel is in the upward position, and the first support wheel supports the load-bearing structure. Then, the two first clamping plates align the load-bearing structure in the X direction. After the alignment is completed, the driving member drives the linkage column to rotate a certain angle. At this time, the locking pin moves from the horizontal part of the L-shaped groove to the connection with the vertical part. Under the action of the gravity of the load-bearing structure, the lifting plate will be driven down, and the lifting plate will drive the vertical column to move down and compress the reset spring, and the locking pin slides in the vertical part of the L-shaped groove. After the first supporting wheel moves, the load-bearing structure is supported by the first supporting wheel after it descends, and then the centering operation in the Y direction can be carried out; when the welding operation is completed, the first clamping plate and the second clamping plate release the clamping action, and the load-bearing structure is hoisted away. At this time, the pressure on the first supporting wheel is lost, and under the action of the reset spring, the vertical column rises until the locking pin moves to the connection between the vertical part and the horizontal part of the L-shaped groove. Then, under the action of the torsion spring, the linkage column rotates, and the locking pin enters the horizontal part of the L-shaped groove, so that the first supporting wheel can be locked in the vertical direction, and the load-bearing structure can be supported subsequently.

[0010] Preferably, the base is located below the supporting platform and is rotatably provided with a first screw rod, the first screw rod is a bidirectional screw rod, the base is located below the supporting platform and is fixedly connected to a first guide rod, the length direction of the first guide rod is consistent with the length direction of the first screw rod, and the two opposite threaded parts on the first screw rod are threadedly connected with a first connecting plate, the first connecting plate is plugged into the first guide rod, the two first connecting plates and the two first clamping plates correspond one to one, and the first connecting plate and the corresponding first clamping plate are fixedly connected, and a first motor is provided on the base to drive the first screw rod to rotate.

[0011] By adopting the above technical solution, the first motor runs, driving the first screw to rotate, and the two first clamping plates can be moved toward or away from each other through the two opposite threaded parts. When the two first clamping plates move toward each other, the load-bearing structure can be aligned in the X direction; the plug-in cooperation between the first connecting plate and the first guide rod limits the rotation of the first connecting plate, ensuring that it can slide in the horizontal direction.

[0012] Preferably, the base is located below the supporting platform and is rotatably provided with a second screw rod, the second screw rod is a bidirectional screw rod, the length direction of the second screw rod is perpendicular to the length direction of the first screw rod, the base is located below the supporting platform and is fixedly connected to a second guide rod, the length direction of the second guide rod is consistent with the length direction of the second screw rod, and the two opposite threaded parts on the second screw rod are threadedly connected with a second connecting plate, the second connecting plate is plugged into the second guide rod, the two second connecting plates and the two second clamping plates correspond one to one, and the second connecting plate and the corresponding second clamping plate are fixedly connected, and a second motor is provided on the base to drive the second screw rod to rotate.

[0013] By adopting the above technical solution, the second motor runs and drives the second screw to rotate. The two second clamping plates can be moved toward or away from each other through the two opposite threaded parts. When the two second clamping plates move toward each other, the load-bearing structure can be aligned in the Y direction. The plug-in cooperation between the second connecting plate and the second guide rod limits the rotation of the second connecting plate to ensure that it can slide in the horizontal direction.

[0014] Preferably, a driving gear is coaxially fixed on the linkage column, and the driving member is configured as a driving rack, wherein mounting plates are provided on both sides of one of the first connecting plates, and the two mounting plates correspond to the two linkage columns one by one, and the length direction of the mounting plate is consistent with the length direction of the first screw rod, and a sliding groove is provided on the mounting plate, and the driving rack slides in the sliding groove, and a sliding groove is provided on the inner wall of the mounting plate located in the sliding groove, and a sliding block is provided at the end of the driving rack, and the sliding block is slidably matched with the sliding groove, and the mounting plate is provided in the sliding groove. A compression spring is provided, one end of the compression spring is connected to the driving rack, and the other end of the compression spring is connected to the inner wall of the sliding groove; a first helical tooth is formed on the driving gear, and a second helical tooth is formed on the driving rack; the first screw rod rotates, the first connecting plate drives the mounting plate to slide, the second helical tooth on the driving rack engages with the first helical tooth on the driving gear, and the driving rack drives the driving gear to rotate, and when the two first clamping plates clamp the load-bearing structure, the rotation angle of the driving gear is a state in which the locking pin just enters the connection between the horizontal part and the vertical part of the L-shaped groove.

[0015] By adopting the above technical solution, when the first motor drives the first screw to rotate, the two first clamping plates move toward each other, and the load-bearing structure is clamped in the X direction. When the first clamping plate moves, the mounting plate moves accordingly, and the driving rack on the mounting plate gradually meshes with the driving gear, and drives the driving gear to rotate. After the movement of the two first clamping plates is completed, the driving rack drives the driving gear to rotate a certain angle, and the locking pin just enters the connection between the horizontal part and the vertical part of the L-shaped groove. At this time, under the gravity of the load-bearing structure, the first supporting wheel descends, and the second supporting wheel plays a supporting role; when the welding operation is completed, the first screw is reversed, and the two first clamping plates move back to back. Because the driving rack and the driving gear are both helical teeth, and the linkage column itself cannot rotate, when the driving rack slides, under the abutment of the helical teeth on the driving gear, the driving rack will slide into the sliding groove, avoiding the driving gear, and then smoothly disengage from the driving gear.

[0016] Preferably, a plurality of universal balls are provided on the sides of the two first clamping plates that are close to each other.

[0017] By adopting the above technical solution, after the first clamping plate clamps the load-bearing structure, when the first supporting wheel descends, the load-bearing structure descends. When the two second clamping plates clamp the load-bearing structure, the load-bearing structure will move in the Y direction, that is, the load-bearing structure will slide in multiple directions relative to the first clamping plate. The first clamping plate is in contact with the load-bearing structure through the universal ball on the surface. The friction between the load-bearing structure and the first clamping plate is small, which facilitates the sliding of the load-bearing structure relative to the first clamping plate.

[0018] Preferably, the driving assembly includes a first slide, a second slide and a third slide, the first slide is vertically arranged, the second slide is installed on the first slide, and the length direction of the second slide is the X direction, the third slide is fixedly installed on the second slide, the length direction of the third slide is the Y direction, and the welding gun is fixedly installed on the third slide.

[0019] By adopting the above technical solution, the structural principles of the first slide, the second slide and the third slide are the same. The motor drives the screw to rotate, driving the slide to slide. The first slide realizes the vertical sliding of the welding gun, the second slide realizes the sliding of the welding gun in the X direction, and the third slide realizes the sliding of the welding gun in the Y direction, that is, the multi-degree-of-freedom movement of the welding gun is realized.

[0020] A metal welding process for a bearing structure of a coal mining machine, using the above-mentioned metal welding device, comprises the following steps:

[0021] S1: Hoist the load-bearing structure to the supporting platform;

[0022] S2: The two first clamping plates move toward each other to center the load-bearing structure in the X direction;

[0023] S3: The two second clamping plates move toward each other to center the load-bearing structure in the Y direction;

[0024] S4: The welding gun performs welding operations on the welding groove.

[0025] Preferably, in step S2, the first supporting wheels first support the load-bearing structure. After the two first clamping plates clamp the load-bearing structure, all the first supporting wheels descend and the second supporting wheels support the load-bearing structure.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The first supporting wheel first supports the load-bearing structure, and the two first clamping plates clamp the load-bearing structure in the X direction. The load-bearing structure can roll on the first supporting wheel, and the load-bearing structure moves smoothly. After the centering clamping in the X direction is completed, all the first supporting wheels descend, and the second supporting wheel supports the load-bearing structure. The two second clamping plates clamp the load-bearing structure in the Y direction. The load-bearing structure cooperates with the second supporting wheels and can easily move in the Y direction. After the centering operation is completed, the welding gun can perform automatic welding operations. This method replaces manual welding, and the movement of the welding gun is more stable, which helps to improve the welding quality and thus ensure the structural strength of the load-bearing structure.

[0028] 2. When the two first clamping plates slide toward each other, the drive rack on the mounting plate gradually engages with the drive gear, driving the drive gear to rotate. When the drive gear rotates, the linkage column rotates, and the locking pin moves from the horizontal part of the L-shaped groove to the vertical part. Subsequently, under the action of the gravity of the load-bearing structure, the first supporting wheel descends, and the second supporting wheel supports the load-bearing structure.

[0029] 3. Universal rolling balls are provided on the sides of the two first clamping plates that are close to each other, that is, when the first clamping plates clamp the load-bearing structure, the friction between the first clamping plates and the load-bearing structure is reduced, making it easier for the load-bearing structure to descend and move in the Y direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the shearer's load-bearing structure;

[0031] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0032] Figure 3 A bottom view schematically shows the overall structure of an embodiment of the present application;

[0033] Figure 4 This is a schematic cross-sectional structural diagram of the supporting platform in the embodiment of the present application;

[0034] Figure 5This is a partial structural cross-sectional view of an embodiment of the present application, mainly showing the structure of the locking pin;

[0035] Figure 6 This is an exploded view of part of the structure of an embodiment of the present application, mainly showing the structure of the L-shaped groove;

[0036] Figure 7 This is a partial structural diagram of an embodiment of the present application, which mainly reflects the structure of the driving gear and the driving rack.

[0037] Reference numerals: 1, base; 11, welding gun; 12, first screw rod; 13, first guide rod; 14, first motor; 15, second screw rod; 16, second guide rod; 17, second motor; 2, supporting platform; 21, first supporting wheel; 22, second supporting wheel; 3, centering assembly; 31, first clamping plate; 311, first fixing rod; 32, second clamping plate; 321, second fixing rod; 4, driving assembly; 41, first slide; 42, second slide; 43, third slide; 5, first connecting plate; 6, second connecting plate; 7, receiving groove; 71 , guide column; 8, lifting plate; 81, vertical column; 82, L-shaped groove; 821, horizontal part; 822, vertical part; 9, linkage column; 91, lifting groove; 92, return spring; 93, locking pin; 10, driving gear; 101, first bevel gear; 20, driving rack; 201, sliding block; 202, second bevel gear; 30, mounting plate; 301, sliding groove; 302, sliding groove; 303, compression spring; 40, universal ball; 50, load-bearing structure; 60, structural box; 601, vertical steel plate; 70, upper steel plate; 701, welding groove. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 This application is described in further detail.

[0039] The embodiments of the present application disclose a metal welding device and process for a load-bearing structure of a coal mining machine.

[0040] Reference Figure 2The metal welding device of the load-bearing structure of the coal mining machine includes a base 1, a supporting platform 2 for supporting the load-bearing structure is formed in the middle position of the base 1, and a plurality of first supporting wheels 21 and second supporting wheels 22 are distributed on the surface of the supporting platform 2, the first supporting wheels 21 and the second supporting wheels 22 are distributed in an array, and all the first supporting wheels 21 and all the second supporting wheels 22 are staggered, the rotation axes of the first supporting wheels 21 and the second supporting wheels 22 are horizontal and perpendicular to each other, wherein the rotation axis direction of the first supporting wheel 21 is consistent with the Y direction, and the rotation axis direction of the second supporting wheel 22 is consistent with the X direction, all the first supporting wheels 21 are synchronously raised and lowered on the supporting platform 2, and in the initial state, the highest point of the first supporting wheel 21 is higher than the second supporting wheel 22; a centering component 3 for centering the load-bearing structure is provided on the supporting platform 2, a welding gun 11 is provided on the upper side of the supporting platform 2 of the base 1, and a driving component 4 for driving the welding gun 11 to move with multiple degrees of freedom is provided on the base 1.

[0041] The centering assembly 3 includes two first clamping plates 31 and two second clamping plates 32. The two first clamping plates 31 are distributed along the X direction, and the length direction of the first clamping plates 31 is along the Y direction. The two second clamping plates 32 are distributed along the Y direction, and the length direction of the second clamping plates 32 is along the X direction. The two first clamping plates 31 are slidably set on the supporting platform 2 along the X direction, and the two second clamping plates 32 are slidably set on the supporting platform 2 along the Y direction. The X direction and the Y direction are both horizontal and perpendicular to each other.

[0042] When the two first clamping plates 31 move, the load-bearing structure will be driven to move, and the movement of the load-bearing structure will be smoother through the first supporting wheel 21. When the two first clamping plates 31 have completed the centering of the load-bearing structure in the X direction, all the first supporting wheels 21 will drop. At this time, the second supporting wheel 22 plays the main supporting role, and the two second clamping plates 32 move toward each other, so that the load-bearing structure can be centered in the Y direction. The second supporting wheel 22 makes the movement of the load-bearing structure smoother. After the centering of the load-bearing structure is completed, the welding gun 11 can perform welding operations. Because the moving trajectory of the welding gun 11 is controlled by programming, the trajectory of the welding gun 11 does not change. Therefore, each load-bearing structure needs to be centered to ensure that the welding gun 11 can smoothly perform welding operations. By performing welding operations on the load-bearing structure in this manner, compared to manual welding, the welding gun 11 can always perform welding operations stably, which helps to improve welding quality and ensure the structural strength of the load-bearing structure.

[0043] The drive assembly 4 includes a first slide 41, a second slide 42, and a third slide 43. All three slides are conventional technical means, and the principle is that a motor drives the screw to rotate, which drives the slide on the screw to move. Therefore, they are not described in detail in this application. The first slide 41 is vertically arranged and fixedly mounted on the support platform 2. The second slide 42 is fixedly mounted on the first slide 41. The second slide 42 is horizontally arranged, and the length of the second slide 42 is in the X direction. The third slide 43 is fixedly mounted on the second slide 42. The third slide 43 is horizontally arranged, and the length of the third slide 43 is in the Y direction. The welding gun 11 is fixedly mounted on the third slide 43. The first slide 41, the second slide 42, and the third slide 43 can realize multi-degree-of-freedom movement of the welding gun 11.

[0044] Reference Figure 2 and Figure 3 The base 1 is located below the supporting platform 2 and is rotatably connected to the first screw rod 12. The first screw rod 12 is a bidirectional screw rod. The base 1 is located on the supporting platform 2 and is also equipped with a first guide rod 13. The length direction of the first guide rod 13 is consistent with the length direction of the first screw rod 12, both are in the X direction. The first connecting plate 5 is threadedly connected to the two opposite threaded parts of the first screw rod 12. The first connecting plate 5 is also plugged and slidably matched with the first guide rod 13. The two first connecting plates 5 correspond to the two first clamping plates 31 one by one. The two first clamping plates 31 are fixedly connected to the first fixing rod 311 on the side away from each other. The first fixing rod 311 is fixedly connected to the corresponding first connecting plate 5 to realize the connection between the first clamping plate 31 and the first connecting plate 5. The supporting platform 2 is provided with an avoidance groove for avoiding the first fixing rod 311. The base 1 is equipped with a first motor 14 that drives the first screw rod 12 to rotate.

[0045] The first motor 14 operates and the first screw rod 12 rotates, thereby driving the two first connecting plates 5 to slide in a direction of approaching or moving away from each other, thereby achieving the sliding of the two first clamping plates 31 .

[0046] The base 1 is located below the supporting platform 2 and is rotatably connected to the second screw rod 15. The second screw rod 15 is a bidirectional screw rod. The base 1 is located below the supporting platform 2 and is also equipped with a second guide rod 16. The length direction of the second guide rod 16 is consistent with the length direction of the second screw rod 15, both are in the Y direction. The second screw rod 15 and the second guide rod 16 are both located above the second screw rod 15; the second connecting plate 6 is threadedly connected to the two opposite threaded portions of the second screw rod 15, and the second connecting plate 6 and the second guide rod 16 are plugged and slidably matched. The two second connecting plates 6 and the two second clamping plates 32 correspond one to one, and the two second clamping plates 32 are fixedly connected to the second fixing rod 321 on the side away from each other. The second fixing rod 321 is fixedly connected to the corresponding second connecting plate 6 to realize the connection between the second clamping plate 32 and the second connecting plate 6. The supporting platform 2 is provided with an avoidance groove for avoiding the second fixing rod 321, and a second motor 17 for driving the second screw rod 15 to rotate is installed on the base 1.

[0047] The second motor 17 is running, and the second screw rod 15 rotates, which can drive the two second connecting plates 6 to slide in the direction of approaching or moving away from each other, thereby achieving the sliding of the two second clamping plates 32.

[0048] Reference Figure 3 、 Figure 4 and Figure 5 A receiving groove 7 is provided in the supporting platform 2. The supporting platform 2 is located in the receiving groove 7 and a lifting plate 8 is provided for lifting. All first supporting wheels 21 are rotatably connected to the lifting plate 8 through ear plates. The supporting platform 2 is located in the receiving groove 7 and a guide column 71 is installed. The guide column 71 is vertically arranged. The guide column 71 is provided with four corresponding to the four corners of the lifting plate 8. The four corners of the lifting plate 8 are plugged into and slidably matched with the guide column 71, which plays a guiding role in the lifting and lowering of the lifting plate 8. A vertical column 81 is integrally formed on the lower side of the lifting plate 8. There are two vertical columns 81, which are located on both sides of the lifting plate 8. The lower side of the supporting platform 2 is rotatably connected to a linkage column 9 through a torsion spring. There are two linkage columns 9, which correspond one to one with the two vertical columns 81. The upper end of the linkage column 9 extends into the accommodating groove 7. A lifting groove 91 is provided in the linkage column 9. The vertical column 81 is inserted into the lifting groove 91, and the vertical column 81 forms a sliding fit with the lifting groove 91. The linkage column 9 is located in the lifting groove 91 and is provided with a return spring 92. The return spring 92 is vertically arranged, and one end of the return spring 92 abuts against the bottom wall of the lifting groove 91, and the other end of the return spring 92 is connected to the bottom wall of the vertical column 81.

[0049] Reference Figure 5 and Figure 6A locking pin 93 is fixedly connected to the inner wall of the linkage column 9, and an L-shaped groove 82 is provided on the outer wall of the vertical column 81. The locking pin 93 is plugged into the L-shaped groove 82 and forms a sliding fit. The L-shaped groove 82 consists of a horizontal part 821 and a vertical part 822. In the initial state, the locking pin 93 is located in the horizontal part 821 of the L-shaped groove 82, locking the vertical movement of the vertical column 81. A driving part for driving the linkage column 9 to rotate is provided on the lower side of the supporting platform 2.

[0050] In the initial state, the first supporting wheel 21 supports the load-bearing structure. At this time, the locking pin 93 is located in the horizontal part 821 of the L-shaped groove 82. When the centering clamping action of the two first clamping plates 31 is completed, the driving member drives the linkage column 9 to rotate until the locking pin 93 enters the vertical part 822 of the L-shaped groove 82. At this time, under the action of the gravity of the load-bearing structure, the lifting plate 8 descends, and the vertical column 81 slides downward in the lifting groove 91 and compresses the return spring 92. At this time, the load-bearing structure is supported by the second supporting wheel 22; when the welding operation is completed, the first clamping plate 31 and the second clamping plate 32 are both detached from the load-bearing structure, and the load-bearing structure is hoisted away. At this time, after the pressure of the load-bearing structure is lost, the return spring 92 first drives the vertical column 81 to slide upward until the locking pin 93 moves to the horizontal part 821. At this time, under the action of the torsion spring, the linkage column 9 is reset.

[0051] Reference Figure 3 、 Figure 4 and Figure 7 The lower side of the linkage column 9 is coaxially fixed with a driving gear 10, and the driving member is configured as a driving rack 20, wherein both sides of a first connecting plate 5 are fixedly connected to a mounting plate 30, the length direction of the mounting plate 30 is consistent with the length direction of the first screw rod 12, and the two mounting plates 30 and the two linkage columns 9 correspond one to one; a sliding groove 301 is provided in the mounting plate 30, and the driving rack 20 slides in the sliding groove 301, and the mounting plate 30 is provided with a sliding groove 302 on the side wall of the sliding groove 301. The end of the driving rack 20 is integrally formed with a sliding block 201, and the sliding block 201 slides with the sliding groove 302; the mounting plate 30 is provided with a compression spring 303 in the sliding groove 301, and the length direction of the compression spring 303 is parallel to the sliding direction of the driving rack 20, one end of the compression spring 303 is connected to the inner wall of the sliding groove 301, and the other end of the compression spring 303 is connected to the driving rack 20.

[0052] A first bevel tooth 101 is formed on the driving gear 10, and a second bevel tooth 202 is formed on the driving rack 20. When the two first connecting plates 5 move toward each other, the driving rack 20 gradually meshes with the driving gear 10 and drives the driving gear 10 to rotate. When the first connecting plate 5 stops moving, that is, when the two first clamping plates 31 clamp the load-bearing structure, the rotation angle of the driving gear 10 is a state where the locking pin 93 just enters the connection between the horizontal portion 821 and the vertical portion 822 of the L-shaped groove 82.

[0053] When the first motor 14 drives the first screw rod 12 to rotate, the two first clamping plates 31 move toward each other, and the load-bearing structure is clamped in the X direction. When the first clamping plate 31 moves, the mounting plate 30 moves accordingly, and the driving rack 20 on the mounting plate 30 gradually engages with the driving gear 10 and drives the driving gear 10 to rotate. After the movement of the two first clamping plates 31 is completed, the driving rack 20 drives the driving gear 10 to rotate a certain angle, and the locking pin 93 just enters the connection between the horizontal portion 821 and the vertical portion 822 of the L-shaped groove 82. At this time, Under the action of gravity of the load-bearing structure, the first supporting wheel 21 descends; when the first screw rod 12 is reversed, the two first clamping plates 31 move back to back. Because the driving rack 20 and the driving gear 10 are both equipped with helical teeth, and the load-bearing structure is still acting on the first supporting wheel 21 at this time, the first supporting wheel 21 cannot rise temporarily, that is, the linkage column 9 cannot rotate. When the driving rack 20 slides, under the abutment of the first helical teeth 101 on the driving gear 10, the driving rack 20 will slide into the sliding groove 301, avoiding the driving gear 10, and then smoothly disengaging from the driving gear 10.

[0054] Reference Figure 2 A plurality of universal ball transfers 40 are installed on the sides of the two first clamping plates 31 that are close to each other. After the first clamping plates 31 clamp the load-bearing structure, when the first supporting wheel 21 descends, the load-bearing structure also descends. When the two second clamping plates 32 align and clamp the load-bearing structure, the load-bearing structure moves in the Y direction, that is, the load-bearing structure slides in multiple directions relative to the first clamping plates 31. The first clamping plates 31 abut against the load-bearing structure through the universal ball transfers 40 on their surfaces. The friction between the load-bearing structure and the first clamping plates 31 is relatively small, facilitating the load-bearing structure to slide relative to the first clamping plates 31.

[0055] The implementation principle of the metal welding device for the load-bearing structure of a coal mining machine in an embodiment of the present application is as follows: the load-bearing structure is hoisted onto the supporting platform 2. Since the hoisting position each time is not unique, a centering operation is required. The two first clamping plates 31 slide toward each other to achieve the centering of the load-bearing structure in the X direction. After the first centering is completed, the first supporting wheel 21 descends, and the second supporting wheel 22 plays a major supporting role for the load-bearing structure. The two second clamping plates 32 slide toward each other to achieve the centering of the load-bearing structure in the Y direction. The welding gun 11 is driven to move at multiple angles by the first slide 41, the second slide 42 and the third slide 43 to perform welding operations. In this way, compared with manual welding, the welding gun 11 can always perform welding operations stably, which helps to improve welding quality and ensure the structural strength of the load-bearing structure.

[0056] The metal welding process of the bearing structure of the coal mining machine, using the above-mentioned metal welding device, includes the following steps:

[0057] S1: Hoist the load-bearing structure onto the supporting platform 2;

[0058] S2: The two first clamping plates 31 move toward each other to center the load-bearing structure in the X direction;

[0059] S3: The two second clamping plates 32 move toward each other to center the load-bearing structure in the Y direction;

[0060] S4: The welding gun 11 performs welding operation on the welding groove.

[0061] In step S2 , the first supporting wheels 21 first support the load-bearing structure. After the two first clamping plates 31 clamp the load-bearing structure, all the first supporting wheels 21 descend, and the second supporting wheels 22 support the load-bearing structure.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A metal welding device for a bearing structure of a coal mining machine, characterized by: The invention comprises a base (1), wherein a supporting platform (2) for supporting a load-bearing structure is provided on the base (1), a plurality of first supporting wheels (21) and second supporting wheels (22) are distributed on the surface of the supporting platform (2), the rotation axis direction of the first supporting wheel (21) and the rotation axis direction of the second supporting wheel (22) are both horizontal and perpendicular to each other, and all the first supporting wheels (21) are synchronously raised and lowered on the supporting platform (2); a centering component (3) for centering the load-bearing structure is also provided on the supporting platform (2); a welding gun (11) is provided on the upper side of the supporting platform (2) of the base (1), and a driving component (4) for driving the welding gun (11) to move with multiple degrees of freedom is provided on the base (1); the centering component (3) comprises two first supporting wheels (21) and a second supporting wheel (22). A clamping plate (31) and two second clamping plates (32), the two first clamping plates (31) are spaced apart along the X direction, the length direction of the first clamping plates (31) is along the Y direction, the two first clamping plates (31) are synchronously slidably arranged on the supporting platform (2), the two second clamping plates (32) are spaced apart along the Y direction, the length direction of the second clamping plates (32) is along the X direction, the two second clamping plates (32) are synchronously slidably arranged on the supporting platform (2), the X direction and the Y direction are both horizontal and perpendicular to each other; a receiving groove (7) is provided in the supporting platform (2), the supporting platform (2) is located in the receiving groove (7) and is provided with a lifting plate (8) for lifting, all the first supporting wheels (21) are rotatably connected to the lifting plate (8), the supporting The support platform (2) is located in the receiving groove (7) and is vertically provided with four guide columns (71). The four corners of the lifting plate (8) are plugged into and slidably matched with the four guide columns (71); a vertical column (81) is provided on the lower side of the lifting plate (8). There are two vertical columns (81) and they are distributed on both sides of the lifting plate (8). A linkage column (9) is provided on the lower side of the support platform (2) through a torsion spring rotation. There are two linkage columns (9) and they correspond to the two vertical columns (81) one by one. The upper end of the linkage column (9) extends into the receiving groove (7). A lifting groove (91) is provided in the linkage column (9). The vertical column (81) is plugged into the lifting groove (91) of the corresponding linkage column (9). The linkage column (9) is located in the lifting groove (9 1) A return spring (92) is provided inside, and the return spring (92) is vertically provided. One end of the return spring (92) abuts against the bottom wall of the lifting groove (91), and the other end of the return spring (92) is connected to the vertical column (81). The linkage column (9) is located on the inner wall of the lifting groove (91) and is provided with a locking pin (93). An L-shaped groove (82) is provided on the outer wall of the vertical column (81). The L-shaped groove (82) is composed of a horizontal part (821) and a vertical part (822). The locking pin (93) is plugged into the L-shaped groove (82) and forms a sliding fit. A driving member for driving the linkage column (9) to rotate is provided on the lower side of the support platform (2). In the initial state, the locking pin (93) is located on the horizontal part (821);The base (1) is located below the supporting platform (2) and is rotatably provided with a first screw rod (12), the first screw rod (12) is a bidirectional screw rod, the base (1) is located below the supporting platform (2) and is fixedly connected to a first guide rod (13), the length direction of the first guide rod (13) is consistent with the length direction of the first screw rod (12), the two opposite threaded parts on the first screw rod (12) are threadedly connected with a first connecting plate (5), the first connecting plate (5) is plugged into the first guide rod (13), the two first connecting plates (5) and the two first clamping plates (31) correspond one to one, and the first A connecting plate (5) and a corresponding first clamping plate (31) are fixedly connected, and a first motor (14) for driving the first screw rod (12) to rotate is provided on the base (1); a driving gear (10) is coaxially fixed on the linkage column (9), and the driving member is configured to drive a rack (20), wherein a mounting plate (30) is provided on both sides of the first connecting plate (5), and the two mounting plates (30) and the two linkage columns (9) correspond one to one, and the length direction of the mounting plate (30) is consistent with the length direction of the first screw rod (12), and a sliding groove (301) is provided on the mounting plate (30), and the driving gear (10) is coaxially fixed on the linkage column (9). The movable rack (20) slides in the sliding groove (301), the mounting plate (30) is located on the inner wall of the sliding groove (301) and is provided with a sliding groove (302), the end of the driving rack (20) is provided with a sliding block (201), the sliding block (201) and the sliding groove (302) are slidably matched, the mounting plate (30) is located in the sliding groove (301) and is provided with a compression spring (303), one end of the compression spring (303) is connected to the driving rack (20), and the other end of the compression spring (303) is connected to the inner wall of the sliding groove (301); the driving gear (10) is formed with The first bevel teeth (101) and the second bevel teeth (202) are formed on the driving rack (20); the first screw rod (12) rotates, the first connecting plate (5) drives the mounting plate (30) to slide, the second bevel teeth (202) on the driving rack (20) engage with the first bevel teeth (101) on the driving gear (10), and the driving rack (20) drives the driving gear (10) to rotate. When the two first clamping plates (31) clamp the load-bearing structure, the driving gear (10) rotates at an angle such that the locking pin (93) just enters the connection between the horizontal portion (821) and the vertical portion (822) of the L-shaped groove (82).

2. The metal welding device for the bearing structure of a coal mining machine according to claim 1, characterized in that: The base (1) is located below the supporting platform (2) and is rotatably provided with a second screw rod (15). The second screw rod (15) is a bidirectional screw rod. The length direction of the second screw rod (15) is perpendicular to the length direction of the first screw rod (12). The base (1) is located below the supporting platform (2) and is fixedly connected with a second guide rod (16). The length direction of the second guide rod (16) is consistent with the length direction of the second screw rod (15). The two opposite threaded parts on the second screw rod (15) are both threadedly connected with a second connecting plate (6). The second connecting plate (6) is plugged into the second guide rod (16). The two second connecting plates (6) and the two second clamping plates (32) correspond one to one, and the second connecting plates (6) and the corresponding second clamping plates (32) are fixedly connected. The base (1) is provided with a second motor (17) for driving the second screw rod (15) to rotate.

3. The metal welding device for the bearing structure of a coal mining machine according to claim 1, characterized in that: A plurality of universal rolling balls (40) are provided on the sides of the two first clamping plates (31) that are close to each other.

4. The metal welding device for the bearing structure of a coal mining machine according to claim 1, characterized in that: The driving assembly (4) includes a first slide (41), a second slide (42) and a third slide (43), wherein the first slide (41) is vertically arranged, the second slide (42) is mounted on the first slide (41), and the length direction of the second slide (42) is the X direction, the third slide (43) is fixedly mounted on the second slide (42), and the length direction of the third slide (43) is the Y direction, and the welding gun (11) is fixedly mounted on the third slide (43).

5. A metal welding process for a bearing structure of a coal mining machine, using the metal welding device according to any one of claims 1 to 4, characterized in that: The steps include: S1: hoisting the load-bearing structure onto the supporting platform (2); S2: The two first clamping plates (31) move toward each other to center and clamp the load-bearing structure in the X direction; S3: The two second clamping plates (32) move toward each other to center the load-bearing structure in the Y direction; S4: The welding gun (11) performs welding operation on the welding groove.

6. The metal welding process for the bearing structure of a coal mining machine according to claim 5, characterized in that: In step S2, the first supporting wheels (21) first support the load-bearing structure. After the two first clamping plates (31) clamp the load-bearing structure, all the first supporting wheels (21) descend, and the second supporting wheels (22) support the load-bearing structure.

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