Mining chain girth welding automatic centering device and using method thereof

Abstract

The invention discloses a mining chain girth welding automatic centering device and a using method thereof, the mining chain girth welding automatic centering device comprises symmetrical chain supporting and conveying assemblies, mining chains are supported on the tops of the chain supporting and conveying assemblies, and a bidirectional centering assembly and a lateral centering assembly are installed between the chain supporting and conveying assemblies on the two sides; the two-way centering assembly and the lateral centering assembly are used for centering and fixing a single chain ring of the mining chain at the tops of the two-way centering assembly and the lateral centering assembly, and jacking assemblies are arranged at the bottoms of the two-way centering assembly and the lateral centering assembly; through the synergistic effect of the two-way centering assembly and the lateral centering assembly, multi-point and multi-direction supporting and positioning are carried out from the interior of the chain ring, and it is ensured that the single chain ring is accurately fixed to the ideal centering position before welding; automatic adjusting functions in multiple directions such as jacking, transverse direction, longitudinal direction and lateral direction are integrated, and automation of the centering process is achieved through driving of the air cylinder and the lead screw motor.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of automatic centering device of mining chain ring welding and its use method. BACKGROUND

[0002] As the core transmission and load-bearing components of scraper conveyors, coal ploughs, hoisting equipment and other mining machinery, the quality of mining chain is directly related to the safety and reliability of the entire mining system. Mining chain is usually formed by welding a plurality of chain rings together, forming a closed force flow transmission ring. Among them, the butt weld of the chain ring is the weakest link in the entire chain structure, and the quality of the weld, including the centering accuracy, weld penetration and defect-free degree, is the key factor determining the fatigue life and breaking strength of the chain.

[0003] At present, many small and medium-sized enterprises still generally use traditional methods. The operation process is roughly as follows: workers forcibly close the two ends of the chain ring that has been bent and formed, adjust the relative positions of the two welded ends using crude methods such as pry bars and hammering, and then perform spot welding. After the positioning welding is fixed, it is moved to the welding station for final welding. This method completely relies on the naked eye and experience of workers, and it is difficult to ensure that the two welded ends are accurately aligned on the centerline. It is prone to misalignment, resulting in stress concentration at the weld, which becomes a hidden danger point for early fatigue fracture of the chain under heavy load and impact load. Different workers' technical levels and working conditions will result in large fluctuations in the centering quality, making it impossible to achieve uniformity and standardization of product quality. Manual adjustment and hammer correction process is tedious and time-consuming, which seriously restricts the production rhythm and makes it difficult to meet the production needs of large-scale and batch production.

[0004] Therefore, it is necessary to invent an automatic centering device for mining chain ring welding and its use method to solve the above problems. SUMMARY

[0005] (I) Invention purpose

[0006] The purpose of the present application is to provide an automatic centering device for mining chain ring welding and its use method.

[0007] (II) Technical solutions

[0008] In order to achieve the above purpose, the present application provides the following technical solutions: an automatic centering device for mining chain ring welding, comprising symmetrical chain support and conveying assemblies, the top of the chain support and conveying assemblies supports a mining chain, and a bidirectional centering assembly and a lateral centering assembly are installed between the two sides of the chain support and conveying assemblies.

[0009] The bidirectional centering assembly and the lateral centering assembly center and fix the single chain ring of the mine chain at the top of the two, and the bottom of the bidirectional centering assembly and the lateral centering assembly is provided with a jacking assembly;

[0010] The two groups of jacking assemblies comprise a fixed base, the bottom of the fixed base is provided with a jacking cylinder at each corner, a plurality of jacking cylinders are synchronously driven, the top of the fixed base is provided with a longitudinal moving screw rod at the center position, and the top of the fixed base is provided with the bidirectional centering assembly and the lateral centering assembly respectively.

[0011] The bidirectional centering assembly comprises a lateral moving base installed at the top of the longitudinal moving screw rod on one side, the top of the lateral moving base is provided with a lateral moving screw rod on both sides, symmetrical outer support type centering rods are installed on the lateral moving screw rods on both sides, a fastening connecting assembly is further arranged between the outer support type centering rods on both sides, and the outer side of the middle part of the outer support type centering rods on both sides supports the inside of the mine chain.

[0012] The lateral centering assembly comprises a moving base installed at the top of the longitudinal moving screw rod on the other side, the top of the moving base is provided with a moving screw rod, a lateral centering rod is installed outside the moving screw rod, the lateral centering rod contacts the inside of the mine chain at the middle part of the outer side, and the lateral centering rod cooperates with the outer support type centering rod to center the single chain ring of the mine chain.

[0013] Preferably, the top of the fixed base is provided with a longitudinal moving groove for installing the longitudinal moving screw rod at the center position, a moving sleeve is installed outside the longitudinal moving screw rod, and the bottom of the lateral moving base and the moving base is fixed on the top of the corresponding moving sleeve.

[0014] Preferably, symmetrical lateral moving screw rods are installed at the center position of the top of the lateral moving base, the symmetrical lateral moving screw rods are arranged in a lateral moving groove, the top of the lateral moving groove is further provided with an auxiliary moving groove on both sides, both ends of the lateral moving base are further provided with a bidirectional screw rod motor for controlling the lateral moving screw rod, and the bottom of the outer support type centering rod is provided with a lateral moving sleeve kit matched with the lateral moving screw rod.

[0015] Preferably, the lateral moving sleeve kit comprises a lateral moving block arranged at the bottom of the outer support type centering rod, a moving hole matched with the lateral moving screw rod is arranged in the lateral moving block, positioning grooves are arranged on both sides of the inner wall of the bottom of the lateral moving groove, positioning plates are extended on both sides of the lateral moving block, rollers are installed between the positioning plates on the same side, the rollers roll in the positioning grooves, installation blocks are further extended on both sides of the top of the lateral moving block, installation grooves are arranged in the installation blocks, a plurality of auxiliary wheels are arranged in the installation grooves, the bottom of the plurality of auxiliary wheels rolls in the auxiliary moving groove, and the lateral moving sleeve kits on both sides are synchronously and reversely moved.

[0016] Preferably, the two outer support type centering rods are arc-shaped as a whole, the arc-shaped middle part is provided with an inner support groove, the inner support groove is arranged to be supported on the inner side of a single chain ring of the mine chain, the two ends of the fastening connection assembly are respectively fixed on the outer wall of the outer support type centering rod, the fastening connection assembly comprises a fixed sleeve arranged on one side of the outer support type centering rod, the other group of the outer support type centering rod is provided with a fixed rod, the end of the fixed rod is arranged in the fixed sleeve, a compression spring is arranged between the inner side bottom of the fixed sleeve and the end of the fixed rod, a limiting ring is arranged at the opening of the fixed sleeve, a limiting plate matched with the limiting ring is arranged on the edge of the end of the fixed rod, and a visible groove is arranged on the outer wall of the fixed sleeve.

[0017] Preferably, one side of the moving base is provided with a lateral screw rod motor for controlling the moving screw rod, the moving screw rod is arranged in the moving groove arranged on the top of the moving base, the inner wall of the moving groove is provided with a rolling groove on both sides, the bottom of the lateral centering rod is provided with a moving assembly matched with the moving groove, the lateral centering rod is provided with two groups, a connecting rod and a reinforcing plate are arranged between the two groups of the lateral centering rod, and the lateral centering rod is in a bending type as a whole, and the bending point is arranged to be matched with the inner side of a single chain ring of the mine chain.

[0018] Preferably, the moving assembly comprises a centering moving block, the centering moving block is provided with a screw hole matched with the moving screw rod, clamping plates matched with the rolling grooves are arranged on both sides of the centering moving block, a plurality of pulleys are arranged between the clamping plates, and the centering moving block moves transversely in the moving groove.

[0019] Preferably, the support conveying assembly comprises support frames arranged on both sides of the bottom of the mine chain, the two support frames are arranged symmetrically, one side of the bottom of the support frame is provided with a support cylinder, the support cylinder synchronously drives the two support frames, a distance of a single chain ring of the mine chain is left between the two support frames, and arc-shaped plates are arranged on the opposite surfaces of the support frame.

[0020] A use method of the automatic centering device for mine chain ring welding, comprising:

[0021] S1, the support cylinders of the two groups of chain support conveying assemblies are in a contracted state, the support frames are lowered to the lowest position; the outer support type centering rods of the bidirectional centering assembly are in an initial position of being close to each other, the lateral centering rods of the lateral centering assembly are in an initial position of being away from the chain conveying path; the lifting cylinders of the two groups of lifting assemblies are in a contracted state, the fixed base is lowered to the lowest position, and the corresponding transverse moving base and the moving base driven by the longitudinal moving screw rod are in a longitudinal middle position; the mine chain to be welded is placed on the top of the support frames of the two groups of chain support conveying assemblies, the extension direction of the mine chain is consistent with the arrangement direction of the support frames, the arc-shaped plates on the opposite surfaces of the support frames are attached to the bottom of the mine chain, and preliminary support is realized.

[0022] S2. The support cylinders of the two sets of chain support conveying components are extended synchronously by the control system, driving the support frame to move upward until the conveying height of the mining chain matches the working height of the subsequent centering component; the conveying drive mechanism of the chain support conveying component is started, driving the mining chain to move along the conveying direction. When the single chain link to be welded moves to the top of the bidirectional centering component and the lateral centering component, the conveying drive mechanism stops running, completing the initial positioning of the target chain link;

[0023] S3. Control the lifting cylinders of the two sets of lifting components to extend synchronously, drive the fixed base to move upward, and then drive the bidirectional centering component and the lateral centering component installed on the top of the fixed base to rise synchronously until the outer support centering rod of the bidirectional centering component and the lateral centering rod of the lateral centering component both extend into the internal cavity of the target chain link. The lifting cylinders stop extending and maintain their current position. According to the longitudinal dimension of the target chain link, the longitudinal moving screws on the top of the two sets of fixed bases are controlled by the main control system to drive the moving sleeve sleeved outside the longitudinal moving screw to move along the longitudinal moving groove. Among them, one longitudinal moving screw drives the lateral moving base to move longitudinally, and the other side drives the moving base to move longitudinally until the inner support groove of the arc-shaped centering rod is aligned with the longitudinal reference position inside the target chain link, and the bending point of the lateral centering rod is aligned with the lateral reference position inside the target chain link. The longitudinal moving screw stops operating and locks.

[0024] S4. Start the bidirectional lead screw motors at both ends of the transverse moving base to drive the transverse moving lead screws on both sides of the top to rotate synchronously in opposite directions, so that the two outer support centering rods move synchronously in opposite directions outward along the transverse moving groove; when the inner support groove of the arc-shaped centering rods on both sides is tightly fitted with the inner sidewall of the target chain link, the bidirectional lead screw motors stop running; at this time, the two outer support centering rods on both sides are stably connected through the fastening connection assembly, and the operator can observe the engagement status through the visual groove, and the target chain link is centered and fixed in both directions in the transverse direction;

[0025] S5. Start the lateral lead screw motor on one side of the movable base to drive the moving lead screw to rotate. Since the moving component at the bottom of the lateral centering rod cooperates with the moving lead screw through the screw hole in the centering moving block, and the clamps on both sides of the centering moving block drive the pulleys to roll in the rolling groove, the two sets of lateral centering rods move laterally along the moving groove. When the bending point of the lateral centering rod is in close contact with the inner wall of the target chain link and forms an orthogonal positioning with the outer support centering rod of the bidirectional centering component, the lateral lead screw motor stops running. At this time, the two sets of lateral centering rods maintain structural stability through the connecting rod and the reinforcing plate, and the target chain link is centered and fixed laterally, completing the all-round centering and positioning of a single chain link.

[0026] S6. Maintain the current state of all centering and lifting components, start the circumferential welding equipment to perform circumferential welding on the target chain link that has been centered and fixed; after the circumferential welding is completed, control each component to reset, repeat step -, and perform automatic centering and circumferential welding on the next chain link to be welded in sequence until the circumferential welding process of the entire mining chain is completed.

[0027] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of the present invention are:

[0028] 1. This invention utilizes the synergistic effect of bidirectional and lateral alignment components to provide multi-point and multi-directional support and positioning from within the chain links, ensuring that each chain link is precisely fixed in the ideal alignment position before welding. This effectively avoids deviations that may occur during manual alignment, providing a precise benchmark for subsequent ring welding processes, thereby significantly improving the welding quality and overall strength of the chain.

[0029] 2. This invention integrates automatic adjustment functions in multiple directions, including lifting, lateral, longitudinal, and sideways movements. Driven by cylinders and lead screw motors, it automates the centering process, greatly reducing reliance on skilled operators and shortening the centering and fixing time of individual chain links, thereby significantly improving the production efficiency of mining chains.

[0030] 3. The fastening connection component in the bidirectional centering assembly of the present invention can adapt to the slight changes in the size of the chain link. After the centering rods on both sides are opened, the spring force can continuously apply a clamping force to ensure that the chain link is stably clamped, preventing positional displacement due to loosening or vibration during the welding process, and further ensuring the welding accuracy. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the chain alignment state structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the lifting bidirectional support split structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the bidirectional support rod split structure of the present invention. Figure 1 ;

[0036] Figure 5This is a schematic diagram of the bidirectional support rod split structure of the present invention. Figure 2 ;

[0037] Figure 6 This is a schematic diagram of the splitting of the lifting and lateral centering structure of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Chain-supported conveyor assembly; 11. Support frame; 12. Support cylinder; 13. Arc plate; 2. Mining chain; 3. Bidirectional centering assembly; 31. Lateral moving base; 32. Lateral moving screw; 33. External support centering rod; 331. Internal support groove; 34. Fastening connection assembly; 341. Fixing sleeve; 342. Fixing rod; 343. Compression spring; 344. Limiting ring; 345. Limiting plate; 346. Visible groove; 35. Lateral moving groove; 36. Auxiliary moving groove; 37. Bidirectional screw motor; 38. Positioning groove; 4. Lateral centering assembly; 41. Moving base 42. Screw; 43. Lateral centering rod; 44. Lateral screw motor; 45. Moving groove; 46. Rolling groove; 47. Connecting rod; 48. Reinforcing plate; 5. Lifting assembly; 51. Fixed base; 52. Lifting cylinder; 53. Longitudinal moving screw; 54. Longitudinal moving groove; 55. Moving sleeve; 6. Lateral moving kit; 61. Lateral moving block; 62. Moving hole; 63. Positioning plate; 64. Roller; 65. Mounting block; 66. Mounting groove; 67. Auxiliary wheel; 7. Moving assembly; 71. Centering moving block; 72. Screw hole; 73. Clamping plate; 74. Pulley. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] This invention provides, for example Figures 1-6 The automatic centering device for circumferential welding of mining chains shown includes symmetrical chain support and conveying components 1, with a mining chain 2 supported on the top of the chain support and conveying components 1, and a bidirectional centering component 3 and a lateral centering component 4 installed between the two chain support and conveying components 1.

[0042] The bidirectional centering component 3 and the lateral centering component 4 center and fix the individual links of the top mining chain 2 of both components. Both the bidirectional centering component 3 and the lateral centering component 4 are equipped with lifting components 5 at the bottom.

[0043] The two sets of lifting components 5 include a fixed base 51. Lifting cylinders 52 are installed at the four corners of the bottom of the fixed base 51. Multiple lifting cylinders 52 are driven synchronously. A longitudinal moving screw 53 is provided at the center of the top of the fixed base 51. The top of the two sets of fixed bases 51 are respectively equipped with a bidirectional centering component 3 and a lateral centering component 4.

[0044] The bidirectional centering assembly 3 includes a transverse moving base 31 installed on the top of a longitudinal moving screw 53 on one side. Transverse moving screws 32 are provided on both sides of the top of the transverse moving base 31. Symmetrical external support centering rods 33 are installed on the transverse moving screws 32 on both sides. A fastening connection assembly 34 is also provided between the two external support centering rods 33. The outer middle part of the two external support centering rods 33 supports the interior of the mining chain 2.

[0045] The lateral centering assembly 4 includes a movable base 41 mounted on top of the longitudinal moving lead screw 53 on the other side. The movable base 41 is provided with a moving lead screw 42 on top. A lateral centering rod 43 is mounted on the outside of the moving lead screw 42. The middle of the outer side of the lateral centering rod 43 contacts the inside of the mining chain 2. The lateral centering rod 43 cooperates with the external support centering rod 33 to center a single link of the mining chain 2.

[0046] Furthermore, the fixed base 51 has a longitudinal moving groove 54 at the top center for installing the longitudinal moving screw 53. The longitudinal moving screw 53 is equipped with a moving sleeve 55. The bottom of the transverse moving base 31 and the moving base 41 are both fixed to the top of the corresponding moving sleeve 55.

[0047] In this invention, the fixed base 51 of the lifting assembly 5 serves as the overall load-bearing foundation. The four symmetrically mounted lifting cylinders 52 at its bottom corners are connected to an external air system via air pipes, ensuring synchronous extension and retraction of the four sets of lifting cylinders 52. A longitudinal moving screw 53 is installed within the longitudinal moving groove 54 at the top center of the fixed base 51. A moving sleeve 55, threaded onto the outside of the longitudinal moving screw 53, is threaded into the longitudinal moving screw 53. The bottom of the transverse moving base 31 of the bidirectional centering assembly 3 and the moving base 41 of the lateral centering assembly 4 are both bolted to the top of the corresponding moving sleeve 55. The rotation of the longitudinal moving screw 53 drives the moving sleeve 55 to move along the longitudinal moving groove 54, thereby adjusting the longitudinal position of the bidirectional centering assembly 3 and the lateral centering assembly 4 to accommodate mining chains 2 with different link spacings.

[0048] Furthermore, a symmetrical lateral moving screw 32 is installed at the top center of the lateral moving base 31. The symmetrical lateral moving screw 32 is set in the lateral moving groove 35. Auxiliary moving grooves 36 are also provided on both sides of the top of the lateral moving groove 35. A bidirectional screw motor 37 for controlling the lateral moving screw 32 is also provided at both ends of the lateral moving base 31. A lateral moving kit 6 matching the lateral moving screw 32 is provided at the bottom of the external support centering rod 33.

[0049] Furthermore, the lateral movement kit 6 includes a lateral movement block 61 disposed at the bottom of the external support centering rod 33. The lateral movement block 61 is provided with a movement hole 62 that matches the lateral movement screw 32. The bottom inner wall of the lateral movement groove 35 is provided with positioning grooves 38 on both sides. Positioning plates 63 extend from both sides of the lateral movement block 61. Rollers 64 are installed between the positioning plates 63 on the same side. The rollers 64 roll in the positioning grooves 38. Mounting blocks 65 also extend from both sides of the top of the lateral movement block 61. Mounting grooves 66 are provided in the mounting blocks 65. Multiple auxiliary wheels 67 are provided in the mounting grooves 66. The bottoms of the multiple auxiliary wheels 67 roll in the auxiliary movement grooves 36. The two lateral movement kits 6 move in opposite directions synchronously.

[0050] Furthermore, the two outer support centering rods 33 are arc-shaped, with an inner support groove 331 in the middle of the arc. The inner support groove 331 is supported on the inner side of a single link of the mining chain 2. The two ends of the fastening connection assembly 34 are fixed to the outer wall of the outer support centering rod 33. The fastening connection assembly 34 includes a fixing sleeve 341 on one side of the outer support centering rod 33 and a fixing rod 342 on one side of the other outer support centering rod 33. The end of the fixing rod 342 is placed inside the fixing sleeve 341, and a compression spring 343 is installed between the bottom of the inner side of the fixing sleeve 341 and the end of the fixing rod 342. A limiting ring 344 is provided at the opening of the fixing sleeve 341, and a limiting plate 345 matching the limiting ring 344 is provided at the edge of the end of the fixing rod 342. A viewing groove 346 is provided on the outer wall of the fixing sleeve 341.

[0051] In this invention, the transverse moving base 31 of the bidirectional centering component 3 has a transverse moving groove 35 at its top center. Symmetrically arranged transverse moving lead screws 32 are installed within the transverse moving groove 35. Auxiliary moving grooves 36 are parallel to each other on both sides of the top of the transverse moving groove 35, and positioning grooves 38 are symmetrically arranged on both sides of the bottom inner wall of the transverse moving groove 35. The output shafts of the bidirectional lead screw motors 37 installed at both ends of the transverse moving base 31 are fixedly connected to the ends of the transverse moving lead screws 32, driving the transverse moving lead screws 32 on both sides to rotate synchronously in opposite directions.

[0052] Furthermore, the external support centering rod 33 is connected to the lateral movement screw 32 via the lateral movement kit 6 at the bottom. The lateral movement block 61 of the lateral movement kit 6 has a movement hole 62 that matches the lateral movement screw 32. The positioning plates 63 extending on both sides of the lateral movement block 61 are connected by a rotating shaft to install rollers 64. The rollers 64 are embedded in the positioning grooves 38 and can roll along the positioning grooves 38. The mounting blocks 65 extending on both sides of the top of the lateral movement block 61 have mounting grooves 66. Multiple auxiliary wheels 67 are installed in the mounting grooves 66 via pins. The bottom of the auxiliary wheels 67 is embedded in the auxiliary movement grooves 36 and can roll along them. Through the dual guidance of the rollers 64 and the auxiliary wheels 67, the external support centering rod 33 can move smoothly laterally, and the lateral movement kits 6 on both sides move synchronously in opposite directions under the drive of the bidirectional screw motor 37.

[0053] Furthermore, the two outer support rods 33 are arc-shaped, with an inner support groove 331 in the middle of the arc. The inner support groove 331 is adapted to the inner contour of a single link of the mining chain 2 and is used to fit and support the inner wall of the link. The fastening connection assembly 34 is fixed at both ends to the outer wall of the external support centering rod 33. One set of external support centering rods 33 is fixedly connected to a fixing sleeve 341 on one side, and the other set of external support centering rods 33 is fixedly connected to a fixing rod 342 on one side. The end of the fixing rod 342 is inserted into the fixing sleeve 341. A compression spring 343 is installed between the bottom of the inner side of the fixing sleeve 341 and the end of the fixing rod 342. A limiting ring 344 is provided at the opening of the fixing sleeve 341. A limiting plate 345 is provided at the edge of the end of the fixing rod 342. The limiting plate 345 and the limiting ring 344 cooperate to prevent the fixing rod 342 from detaching from the fixing sleeve 341. A viewing groove 346 opened on the outer wall of the fixing sleeve 341 facilitates observation of the extension and retraction state of the fixing rod 342.

[0054] Furthermore, a lateral lead screw motor 44 for controlling the moving lead screw 42 is provided on one side of the movable base 41. The moving lead screw 42 is installed in the moving groove 45 at the top of the movable base 41. Rolling grooves 46 are provided on both sides of the inner wall of the moving groove 45. The bottom of the lateral centering rod 43 is provided with a moving component 7 that matches the moving groove 45. There are two sets of lateral centering rods 43. A connecting rod 47 and a reinforcing plate 48 are provided between the two sets of lateral centering rods 43. The lateral centering rod 43 is bent in the whole, and its bending point corresponds to the inner side of a single link of the mining chain 2.

[0055] Furthermore, the moving component 7 includes a centering moving block 71, which has a screw hole 72 for matching the moving lead screw 42. Clamping plates 73 for matching the rolling groove 46 extend from both sides of the centering moving block 71. Multiple pulleys 74 are installed between the clamping plates 73. The centering moving block 71 moves laterally in the moving groove 45.

[0056] In this invention, a lateral lead screw motor 44 is installed on one side of the movable base 41 of the lateral centering component 4. The output shaft of the lateral lead screw motor 44 is fixedly connected to the end of the movable lead screw 42. The movable lead screw 42 is installed in the movable groove 45 at the top of the movable base 41. Rolling grooves 46 are opened on both sides of the inner wall of the movable groove 45. The movable component 7 at the bottom of the lateral centering rod 43 includes a centering movable block 71. A screw hole 72 matching the movable lead screw 42 is opened in the centering movable block 71. Multiple pulleys 74 are installed between the clamping plates 73 extending on both sides of the centering movable block 71 through pins. The pulleys 74 are embedded in the rolling grooves 46 and can roll along them, so as to realize the smooth lateral movement of the lateral centering rod 43.

[0057] Furthermore, there are two sets of lateral centering rods 43. The two sets of lateral centering rods 43 are fixedly connected by connecting rods 47 and reinforcing plates 48 to enhance structural stability. The lateral centering rods 43 are bent in shape, and their bending points are adapted to the inner contour of a single link of the mining chain 2. They are used to laterally fit and support the inner wall of the link, and cooperate with the external support centering rods 33 to achieve all-round centering of the link.

[0058] Specifically, the support conveying assembly 1 includes support frames 11 set on both sides of the bottom of the mining chain 2. The two support frames 11 are symmetrically arranged. A support cylinder 12 is provided on one side of the bottom of the support frame 11. The support cylinder 12 synchronously drives the two support frames 11. The distance between the two support frames 11 is the distance between a single link of the mining chain 2. An arc plate 13 is provided on the opposite side of the support frame 11.

[0059] In this invention, the chain support conveying assembly 1 includes support frames 11 symmetrically arranged on both sides of the bottom of the mining chain 2. A support cylinder 12 is installed on one side of the bottom of the support frame 11. The support cylinder 12 synchronously drives the support frames 11 on both sides to rise and fall. The distance between the two support frames 11 is the spacing of a single link of the mining chain 2, which facilitates the centering component to extend into the center. An arc plate 13 is provided on the opposite side of the support frame 11. The arc plate 13 is adapted to the bottom contour of the mining chain 2 to ensure the stability of the chain during the conveying process.

[0060] A method of using an automatic alignment device for mining chain ring welding includes:

[0061] S1. The support cylinders 12 of the two sets of chain-supported conveying components 1 are in a retracted state, and the support frame 11 is lowered to the lowest position; the external support rods 33 of the bidirectional centering component 3 are in an initial position close to each other, and the lateral centering rods 43 of the lateral centering component 4 are in an initial position away from the chain conveying path; the lifting cylinders 52 of the two sets of lifting components 5 are both in a retracted state, the fixed base 51 is lowered to the lowest position, and the longitudinal moving screw 53 drives the corresponding transverse moving base 31 and moving base 41 to the longitudinal center position; the mining chain 2 to be welded is placed on the top of the support frame 11 of the two chain-supported conveying components 1, so that the extension direction of the mining chain 2 is consistent with the arrangement direction of the support frame 11, and ensures that the bottom of the mining chain 2 is in contact with the arc plate 13 on the opposite side of the support frame 11, so as to achieve initial support;

[0062] S2. The support cylinders 12 of the two sets of chain support conveying components 1 are extended synchronously by the control system, driving the support frame 11 to move upward until the conveying height of the mining chain 2 is matched with the working height of the subsequent centering component; the conveying drive mechanism of the chain support conveying component 1 is started, driving the mining chain 2 to move along the conveying direction. When the single chain link to be welded moves to the top of the bidirectional centering component 3 and the lateral centering component 4, the conveying drive mechanism stops running, completing the initial positioning of the target chain link;

[0063] S3. Control the lifting cylinders 52 of the two sets of lifting components 5 to extend synchronously, driving the fixed base 51 to move upward, thereby driving the bidirectional centering component 3 and the lateral centering component 4 installed on the top of the fixed base 51 to rise synchronously until the external support centering rod 33 of the bidirectional centering component 3 and the lateral centering rod 43 of the lateral centering component 4 both extend into the internal cavity of the target chain link, and the lifting cylinders 52 stop extending and maintain their current position; according to the longitudinal dimension of the target chain link, the top of the two sets of fixed bases 51 is controlled separately by the central control system. The longitudinal moving screw 53 operates, driving the moving sleeve 55 sleeved outside the longitudinal moving screw 53 to move along the longitudinal moving groove 54; wherein, one side of the longitudinal moving screw 53 drives the transverse moving base 31 to move longitudinally, and the other side drives the moving base 41 to move longitudinally, until the inner support groove 331 of the arc-shaped centering rod 33 is aligned with the longitudinal reference position inside the target chain link, and the bending point of the lateral centering rod 43 is aligned with the lateral reference position inside the target chain link, the longitudinal moving screw 53 stops operating and locks;

[0064] S4. Start the bidirectional lead screw motors 37 at both ends of the transverse moving base 31 to drive the transverse moving lead screws 32 on both sides of the top to rotate synchronously in the opposite direction, so that the two outer support centering rods 33 on both sides move outward synchronously in the opposite direction along the transverse moving groove 35; when the inner support groove 331 of the arc-shaped centering rods 33 on both sides is tightly fitted with the inner side wall of the target chain link, the bidirectional lead screw motors 37 stop running; at this time, the two outer support centering rods 33 on both sides are stably connected through the fastening connection assembly 34, and the operator can observe the cooperation status through the visual groove 346, and the target chain link is centered and fixed in both directions in the transverse direction;

[0065] S5. Start the lateral lead screw motor 44 on one side of the movable base 41 to drive the movable lead screw 42 to rotate. Since the movable component 7 at the bottom of the lateral centering rod 43 cooperates with the movable lead screw 42 through the screw hole 72 in the centering movable block 71, and the clamping plates 73 on both sides of the centering movable block 71 drive the pulley 74 to roll in the rolling groove 46, the two sets of lateral centering rods 43 are driven to move laterally along the moving groove 45. When the bending point of the lateral centering rod 43 is in close contact with the inner wall of the target chain link and forms an orthogonal positioning with the outer support centering rod 33 of the bidirectional centering component 3, the lateral lead screw motor 44 stops running. At this time, the two sets of lateral centering rods 43 maintain structural stability through the connecting rod 47 and the reinforcing plate 48, and the target chain link is centered and fixed laterally, completing the all-round centering positioning of a single chain link.

[0066] S6. Maintain the current state of all centering and lifting components, start the circumferential welding equipment to perform circumferential welding on the target chain link that has been centered and fixed; after the circumferential welding is completed, control each component to reset, repeat steps 2-6, and perform automatic centering and circumferential welding on the next chain link to be welded of the mining chain 2 in sequence until the circumferential welding process of the entire mining chain is completed.

[0067] In this invention, the omnidirectional centering of a single link of the mining chain 2 is achieved through the coordinated operation of the bidirectional centering component 3 and the lateral centering component 4. The two outer-bracing centering rods 33 of the bidirectional centering component 3 feature an arc-shaped structure, with the inner support groove 331 precisely matching the inner contour of the link. Driven synchronously in opposite directions by the bidirectional lead screw motor 37, they ensure the lateral centering accuracy of the link. The bent lateral centering rods 43 of the lateral centering component 4 provide secondary positioning of the link from the side, forming multi-point support with the outer-bracing centering rods 33, effectively preventing radial displacement of the link during welding. Simultaneously, the dual guiding structure of the rollers 64 and auxiliary wheels 67 of the lateral movement kit 6 reduces frictional resistance during the movement of the centering rods, improves movement stability, and further ensures centering accuracy, thereby ensuring the consistency and reliability of the welded joint and improving the welding quality of the mining chain.

[0068] In this invention, chain conveying, lifting adjustment, longitudinal position adjustment, bidirectional centering, and lateral centering are all driven by motors and cylinders, achieving automated control and eliminating the need for manual centering, thus significantly reducing the labor intensity of operators. The precise drive of the bidirectional lead screw motor 37 and the lateral lead screw motor 44, along with the synchronous movement of the two external support centering rods 33 and lateral centering rods 43, shortens the centering time. The synchronous drive of the lifting cylinder 52 ensures the smooth lifting and lowering of the centering components, avoiding the errors and inefficiencies caused by manual operation. Actual testing shows that the single-chain link centering time of this device is shorter than that of traditional manual centering methods, significantly improving the welding production efficiency of mining chains and making it suitable for large-scale mass production.

[0069] In this invention, the fastening connection component 34 of the bidirectional centering assembly 3 provides elastic preload through the compression spring 343, which not only ensures the tight fit between the outer support centering rod 33 and the inner wall of the chain link, but also buffers the impact force during the centering process, preventing chain link deformation. The special structural design of the outer support centering rod 33 and the lateral centering rod 43 adapts to the chain link profiles of different specifications of mining chains. By adjusting the stroke of the lateral moving screw 32 and the moving screw 42, centering and fixing of chain links with different diameters and pitches can be achieved, with a wide range of adaptability. At the same time, the structural design of the positioning plate 63, roller 64 and auxiliary wheel 67 of the lateral moving kit 6 enhances the stability of the outer support centering rod 33 during movement. The connecting rod 47 and reinforcing plate 48 between the two sets of lateral centering rods 43 improve the structural strength of the lateral centering assembly 4, ensuring the stability and service life of the device under long-term high-intensity working environment.

[0070] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A mine chain ring welding automatic centering device, characterized in that: Including symmetrical chain support conveying assembly (1), the chain support conveying assembly (1) top support mining chain (2), the two sides between the chain support conveying assembly (1) are equipped with bidirectional centering assembly (3) and lateral centering assembly (4); The bidirectional centering assembly (3) and the lateral centering assembly (4) are fixed to the single link of the mining chain (2) on the top, and the bottom of the bidirectional centering assembly (3) and the lateral centering assembly (4) is provided with a jacking assembly (5); Two groups of jacking assemblies (5) include fixed base (51), the bottom of the fixed base (51) is provided with jacking cylinder (52) on the four corners, a plurality of jacking cylinders (52) are synchronously driven, the top of the fixed base (51) is provided with longitudinal moving screw rod (53), and the top of the two groups of fixed base (51) is respectively provided with bidirectional centering assembly (3) and lateral centering assembly (4); The bidirectional centering assembly (3) includes a lateral moving base (31) installed on the top of the longitudinal moving screw rod (53) on one side, the top of the lateral moving base (31) is provided with lateral moving screw rod (32) on both sides, and the lateral moving screw rod (32) is provided with symmetrical external support type centering rod (33) on both sides, and the external support type centering rod (33) is further provided with fastening connection assembly (34) between the two, and the outside of the external support type centering rod (33) supports the inside of the mining chain (2). The lateral centering assembly (4) includes a moving base (41) installed on the top of the longitudinal moving screw rod (53) on the other side, the top of the moving base (41) is provided with moving screw rod (42), the moving screw rod (42) is provided with lateral centering rod (43) outside, the lateral centering rod (43) contacts the inside of the mining chain (2) on the outside, and the lateral centering rod (43) cooperates with the external support type centering rod (33) to center the single link of the mining chain (2).

2. The automatic centering device for ring welding of mine chains according to claim 1, characterized in that: The top of the fixed base (51) is provided with longitudinal moving groove (54) for installing the longitudinal moving screw rod (53), the longitudinal moving screw rod (53) is provided with moving sleeve (55) outside, and the top of the moving sleeve (55) is fixed to the corresponding moving sleeve (55) on the bottom of the lateral moving base (31) and the moving base (41).

3. The automatic centering device for chain ring welding in mining as claimed in claim 1, characterized in that: The top of the lateral moving base (31) is provided with symmetrical lateral moving screw rod (32) in the center, the symmetrical lateral moving screw rod (32) is arranged in the lateral moving groove (35), the top of the lateral moving groove (35) is further provided with auxiliary moving groove (36) on both sides, and the both ends of the lateral moving base (31) are further provided with bidirectional screw rod motor (37) for controlling the lateral moving screw rod (32), and the bottom of the external support type centering rod (33) is provided with lateral moving sleeve (6) matched with the lateral moving screw rod (32).

4. The automatic centering device for ring welding of mine chains according to claim 3, characterized in that: The lateral moving kit (6) includes a lateral moving block (61) arranged at the bottom of the outer supporting centering rod (33), the lateral moving block (61) is internally provided with a moving hole (62) matched with the lateral moving lead screw (32), the lateral moving groove (35) is internally provided with a positioning groove (38) at the inner wall of the bottom of the lateral moving groove (35), the lateral moving block (61) is extended with a positioning plate (63) at both sides of the lateral moving block (61), the positioning plates (63) at the same side are installed with a roller (64) between the positioning plates (63), the roller (64) rolls in the positioning groove (38), the lateral moving block (61) is further extended with a mounting block (65) at both sides of the top of the lateral moving block (61), the mounting block (65) is internally provided with a mounting groove (66), the mounting groove (66) is internally provided with a plurality of auxiliary wheels (67), the plurality of auxiliary wheels (67) roll at the bottom of the auxiliary moving groove (36), and the lateral moving kits (6) at both sides are synchronously and reversely moved.

5. The automatic centering device for chain ring welding in mining as claimed in claim 1, characterized in that: Both sides of the outer supporting centering rod (33) are arc-shaped as a whole, the arc-shaped middle part of the outer supporting centering rod (33) is provided with an inner supporting groove (331), the inner supporting groove (331) is correspondingly supported at the inner side of a single chain ring of the mining chain (2), the fastening connecting assembly (34) is fixed at the outer wall of the outer supporting centering rod (33) at both ends, respectively, the fastening connecting assembly (34) includes a fixed sleeve (341) arranged at one side of the outer supporting centering rod (33), the other group of the outer supporting centering rod (33) is provided with a fixed rod (342) at one side, the fixed rod (342) is arranged in the fixed sleeve (341) at the end, and the fixed sleeve (341) is internally provided with a compression spring (343) between the inner side bottom of the fixed sleeve (341) and the end of the fixed rod (342), the fixed sleeve (341) is provided with a limiting ring (344) at the opening, the fixed rod (342) is provided with a limiting plate (345) matched with the limiting ring (344) at the edge of the end of the fixed rod (342), and the fixed sleeve (341) is provided with a visible groove (346) at the outer wall.

6. The automatic centering device for chain ring welding in mining as claimed in claim 1, characterized in that: One side of the moving base (41) is provided with a lateral lead screw motor (44) for controlling the moving lead screw (42), the moving lead screw (42) is installed in the moving groove (45) at the top of the moving base (41), both sides of the inner wall of the moving groove (45) are provided with a rolling groove (46), the lateral centering rod (43) is provided with a moving assembly (7) matched with the moving groove (45) at the bottom, and the lateral centering rod (43) is provided with two groups, the two groups of the lateral centering rod (43) are provided with a connecting rod (47) and a reinforcing plate (48) therebetween, the lateral centering rod (43) is of a bending type as a whole, and the bending point of the lateral centering rod (43) corresponds to the inner side of a single chain ring of the mining chain (2).

7. The automatic centering device for chain ring welding in mining as claimed in claim 6, characterized in that: The moving assembly (7) includes a centering moving block (71), the centering moving block (71) is internally provided with a screw hole (72) matched with the moving lead screw (42), the centering moving block (71) is extended with a clamping plate (73) matched with the rolling groove (46) at both sides of the centering moving block (71), a plurality of pulleys (74) are installed between the clamping plates (73), and the centering moving block (71) moves laterally in the moving groove (45).

8. The automatic centering device for chain ring welding in mining as claimed in claim 1, characterized in that: The support conveying assembly (1) comprises support frames (11) arranged at the bottom of both sides of the mine chain (2), the support frames (11) on both sides are symmetrically arranged, one side of the bottom of the support frame (11) is provided with a support cylinder (12), the support cylinder (12) synchronously drives the support frames (11) on both sides, and the support frames (11) on both sides are left with a distance of a single chain ring of the mine chain (2), and opposite sides of the support frame (11) are provided with arc-shaped plates (13).

9. A method of using the automatic centering device for welding of rings of a mine chain according to any of claims 1 to 8, characterized in that, Comprise: S1, the support cylinders (12) of the two groups of chain support conveying assemblies (1) are in a retracted state, the support frames (11) are lowered to the lowest position; the outer support type centering rods (33) of the bidirectional centering assembly (3) are in the initial position of being close to each other, the lateral centering rods (43) of the lateral centering assembly (4) are in the initial position of being away from the chain conveying path; the jacking cylinders (52) of the two groups of jacking assemblies (5) are all in a retracted state, the fixed bases (51) are lowered to the lowest position, the longitudinal moving screws (53) drive the corresponding transverse moving bases (31) and moving bases (41) to be in the longitudinal middle position; the mine chain (2) to be welded is placed on the top of the support frames (11) of the two groups of chain support conveying assemblies (1), so that the extension direction of the mine chain (2) is consistent with the arrangement direction of the support frames (11), and the bottom of the mine chain (2) is ensured to be attached to the arc-shaped plates (13) on the opposite sides of the support frames (11), and preliminary support is realized; S2, the support cylinders (12) of the two groups of chain support conveying assemblies (1) are synchronously extended through the control of the general control system, the support frames (11) are driven to move upwards until the conveying height of the mine chain (2) is adapted to the working height of the subsequent centering assembly; the conveying drive mechanism of the chain support conveying assembly (1) is started, the mine chain (2) is driven to move in the conveying direction, when the single chain ring to be welded moves to the directly above of the bidirectional centering assembly (3) and the lateral centering assembly (4), the conveying drive mechanism stops running, and the preliminary positioning of the target chain ring is completed; S3, the lifting cylinders (52) of the two groups of lifting assemblies (5) are controlled to extend synchronously, the fixed base (51) is driven to move upward, and then the bidirectional centering assembly (3) and the lateral centering assembly (4) installed on the top of the fixed base (51) are driven to rise synchronously, until the outer support type centering rods (33) of the bidirectional centering assembly (3) and the lateral centering rods (43) of the lateral centering assembly (4) are all inserted into the internal cavity of the target link, the lifting cylinders (52) stop extending and remain at the current position; according to the longitudinal size of the target link, the longitudinal moving lead screws (53) on the top of the two groups of fixed bases (51) are controlled to operate respectively through the general control system, and the moving sleeves (55) sleeved outside the longitudinal moving lead screws (53) are driven to move along the longitudinal moving grooves (54); wherein, the lateral moving base (31) is driven to move longitudinally by one side of the longitudinal moving lead screw (53), and the moving base (41) is driven to move longitudinally by the other side, until the arc-shaped middle inner support groove (331) of the outer support type centering rod (33) is aligned with the longitudinal reference position on the inner side of the target link, and the bending point of the lateral centering rod (43) is aligned with the lateral reference position on the inner side of the target link, and the longitudinal moving lead screw (53) stops operating and is locked; S4, the bidirectional lead screw motors (37) at the two ends of the lateral moving base (31) are started, the lateral moving lead screws (32) on the two sides of the top are driven to operate synchronously and reversely, so that the two outer support type centering rods (33) move synchronously and reversely outward along the lateral moving grooves (35); when the arc-shaped middle inner support grooves (331) of the two outer support type centering rods (33) are tightly attached to the inner side wall of the target link, the bidirectional lead screw motors (37) stop operating; at this time, the two outer support type centering rods (33) are stably connected through the fastening connection assembly (34), and the operator can observe the matching state through the visual groove (346), and the target link is fixed and centered in the lateral direction; S5, the lateral lead screw motor (44) on one side of the moving base (41) is started, and the moving lead screw (42) is driven to operate, because the moving assembly (7) at the bottom of the lateral centering rod (43) is matched with the moving lead screw (42) through the screw hole (72) in the centering moving block (71), and the clamping plates (73) on the two sides of the centering moving block (71) drive the pulleys (74) to roll in the rolling groove (46), so that the two groups of lateral centering rods (43) move laterally along the moving grooves (45); when the bending point of the lateral centering rod (43) is in close contact with the inner side wall of the target link, and forms orthogonal positioning with the outer support type centering rod (33) of the bidirectional centering assembly (3), the lateral lead screw motor (44) stops operating; at this time, the two groups of lateral centering rods (43) remain stable in structure through the connecting rods (47) and the reinforcing plates (48), the target link is fixed and centered in the lateral direction, and the overall centering positioning of the single link is completed; S6, keep the current state of all centering assemblies and jacking assemblies, start the girth welding equipment to girth weld the target link ring that has been centered; after the girth welding operation is completed, control the reset of each assembly, repeat steps 2-6, and sequentially perform automatic centering and girth welding operation on the next to-be-welded link ring of the mine chain (2) until the girth welding process of the whole mine chain is completed.

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