Coal mine drill rod machining production line and method combining upsetting and welding processes

Abstract

The invention relates to the field of upsetting, in particular to a coal mine drill rod machining production line combining upsetting and welding processes and a method, and the coal mine drill rod machining production line comprises a bottom plate used for supporting all functional parts of the production line; the upsetting device comprises a bottom plate, a supporting table and an upsetting part, the supporting table is arranged on the bottom plate, the upsetting part is arranged in the supporting table, and the upsetting part is used for positioning and clamping the upsetting part of a drill rod; the pressing parts are arranged on the top of the bottom plate and the outer side of the supporting table correspondingly and used for conducting extrusion heading treatment on the ends of the clamped drill rods; according to the coal mine drill rod machining production line combining the upsetting and welding technology and the method, the medium-length forming cavity and the long-length forming cavity can be flexibly switched through a two-stage butt-joint structure, the whole set of upsetting assembly does not need to be replaced, the upsetting assembly is not required to be replaced, the upsetting assembly is not required to be replaced, and the production efficiency is improved. And the length requirements of different drilling rod upsetting parts can be met.

Description

Production line and method for processing drill pipes for coal mines, combining upsetting and welding processes Technical Field

[0001] This invention relates to the field of upsetting technology, specifically to a coal mine drill pipe processing production line and method that combines upsetting and welding processes. Background Technology

[0002] In fields such as oil and gas extraction, mining drilling, and geological exploration, drill pipes, as core transmission and load-bearing components, must withstand high-intensity torque, pressure, and wear. The strength of their end structures directly determines the service life and operational safety of the drill pipes. To improve the connection strength and adaptability of drill pipe ends, the drill pipe ends are usually upsetting, which increases the end cross-sectional area through extrusion molding. At the same time, external threaded bushings are welded to ensure reliable connection between drill pipes.

[0003] Currently, the industry mostly adopts a "split-type operation" mode for drill pipe end processing. This involves first welding the outer threaded sleeve using a dedicated welding machine, and then transferring it to the upsetting equipment for end shaping. This lacks an integrated structure for welding and upsetting. Furthermore, the forming cavity size of existing upsetting equipment is fixed, making it impossible to flexibly adjust to accommodate different upsetting lengths. Additionally, the disassembly and assembly of key components (such as the upsetting seat and hydraulic cylinder) are cumbersome, and troubleshooting is time-consuming. This split-type operation not only leads to low process connection efficiency and large secondary positioning deviations of the drill pipe, but also makes it susceptible to changes in the drill pipe's posture after welding, affecting upsetting accuracy. Summary of the Invention

[0004] The present invention aims to provide a production line and method for processing drill pipes for coal mines that combines upsetting and welding processes, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coal mine drill pipe processing production line combining upsetting and welding processes, comprising a base plate for supporting the various functional components of the production line; a support platform and an upsetting section, wherein the support platform is disposed on the base plate and the upsetting section is disposed inside the support platform, the upsetting section being used to position and clamp the upsetting portion of the drill pipe; a pressing section, wherein the pressing section is respectively disposed on the top of the base plate and the outside of the support platform, for pressing and upsetting the clamped drill pipe end; and a support rod seat, wherein the support rod seat is disposed on the base plate for fixing and supporting the drill pipe.

[0006] Preferably, a fixed rail is fixedly installed on the top of the base plate, and a No. 1 motor is fixedly installed on the outer end face of the fixed rail. The output end of the No. 1 motor passes through the fixed rail and is connected to a lead screw through a coupling. The end face of the lead screw is rotatably installed inside the fixed rail through a bearing.

[0007] Preferably, the outer thread of the lead screw is connected to a frame, the frame is slidably adapted to the inside of the fixed rail, a second motor is fixedly installed on the top of the frame, the output end of the second motor is connected to a clamp through a coupling, and an outer threaded sleeve is clamped inside the clamp; through the coordinated work of the first motor and the second motor, the outer threaded sleeve and the end face of the drill rod rotate and rub until they melt, thereby achieving welding between the two.

[0008] Preferably, the roughing section includes an operating platform, which is fixedly installed inside the support platform. A first positioning seat is fixedly installed on the outer end face of the operating platform by bolts, and a first roughing seat is fitted on the outer end face of the first positioning seat. A second positioning seat is fixedly connected to the top of the inner cavity of the operating platform by a thick spring. The first and second positioning seats are used for positioning and clamping the drill rod.

[0009] Preferably, a locking platform is inserted into the top of the operating table, and a folding strip is fixedly installed on the top of the locking platform. A first threaded hole is opened on the top of both the folding strip and the locking platform, and a first screw is threaded into the first threaded hole. A transverse groove is opened on the top of the operating table, and a first hydraulic cylinder and a second hydraulic cylinder are slidably adapted in the transverse groove. The fixed end of the first hydraulic cylinder is slidably adapted to the top of the locking platform.

[0010] Preferably, a second threaded hole is provided on the outer side of the folding strip, and a second screw is internally threaded into the second threaded hole. A bearing sleeve is fixedly installed on the outer end face of the second screw. A limit block is rotatably installed on the end of the bearing sleeve away from the second screw. The limit block is used to limit and position the movement stroke of the first hydraulic cylinder. A fifth jacking seat is fixedly installed at the bottom of the output end of the first hydraulic cylinder. The top of the fifth jacking seat is slidably adapted to the bottom of the locking platform. The outer end face of the fifth jacking seat is provided with a protrusion, which is fitted into a groove on the top of the second positioning seat to achieve the fitting and docking of the two.

[0011] Preferably, the fifth pier roughing seat has a notch at the end away from the second positioning seat; there are two second hydraulic cylinders, one of which has the second pier roughing seat fixedly installed at the bottom of its output end, and the other has the third pier roughing seat fixedly installed at the bottom of its output end. The outer end faces of the second and third pier roughing seats are fixedly connected to a first fitting block, and the first fitting block fits into the notch.

[0012] Preferably, the bottom of the inner cavity of the operating table is slidably fitted with a No. 4 roughing seat, and the outer end face of the No. 4 roughing seat is fixedly connected with a No. 2 fitting block. The No. 2 fitting block is fitted with a groove opened on the outer side of the No. 1 roughing seat to achieve docking between the two. The end of the No. 4 roughing seat away from the No. 2 fitting block is fixedly connected with a side push plate, and the outer end face of the side push plate is squeezed and fitted with the No. 2 roughing seat.

[0013] Preferably, the pressing part includes a bracket, a hydraulic rod is fixedly installed inside the bracket, a sealing plug is fixedly installed inside the hydraulic rod, a piston rod is slidably adapted inside the hydraulic rod, a groove is formed on the outer side of the piston rod, a slip ring is slidably adapted inside the groove, a spring is fixedly connected to the outer end face of the slip ring, and the end of the spring away from the slip ring is fixedly connected to the inner wall of the groove; an outer connecting ring is rotatably installed on the outer side of the slip ring through a bearing, and an inner connecting rod is inserted into the outer side of the outer connecting ring.

[0014] The method for processing coal mine drill rods combining upsetting and welding processes includes the following steps: Step 1: First, place the drill rod to be processed on the support seat, accurately feed it into the upsetting position, and tighten it with the cover plate bolts. Start motors 1 and 2. Motor 2 drives the rotating external threaded sleeve to feed towards the drill rod. Through rotational friction, the mating surface melts, achieving a firm weld between the external threaded sleeve and the drill rod. Step 2: After welding is completed, hydraulic cylinder 1 drives upsetting seat 5 to move down, forming a forming cavity with upsetting seat 1. At the same time, positioning seat 2 moves down synchronously for positioning. Start the hydraulic rod, and the piston rod extends into the forming cavity to position the end of the drill rod. Apply pressure to shape and complete the roughing process; Step 3: When the No. 5 roughing seat or the No. 1 hydraulic cylinder fails, loosen the No. 2 screw to release the limit, move and remove the faulty part for inspection, push the No. 2 hydraulic cylinder to the corresponding position, so that the No. 2 and No. 4 roughing seats are respectively connected to the positioning seats, and quickly complete the replacement to restore the equipment operation; Step 4: The equipment adjusts the length of the forming cavity in stages: for medium lengths, the inner connecting rod is placed horizontally to push the No. 2 and No. 4 roughing seats to connect with the corresponding parts to form a long forming channel to meet the requirements. For long lengths, the inner connecting rod is retracted longitudinally, and the No. 3 roughing seat and other multi-stage connections are driven by the outer connecting ring to form a long forming channel to meet the requirements.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The two-stage docking structure allows for flexible switching between medium-length and long forming cavities, eliminating the need to replace the entire set of upsetting components, thus meeting the length requirements of different drill rod upsetting parts, greatly improving the equipment's versatility, adapting to diverse production scenarios, and reducing the cost of special tooling.

[0016] 2. For easily worn or faulty components such as hydraulic cylinders and jacking seats, a convenient disassembly and replacement structure is designed. The replacement and reassembly of components can be completed simply by turning the screw and moving the positioning, without the need for complicated disassembly procedures. This greatly shortens the equipment downtime for maintenance and ensures production continuity.

[0017] 3. When the molding cavity is closed, precise alignment is achieved through the fitting of the positioning seat and the engagement of the protrusion. During component replacement and molding cavity adjustment, the guiding structure ensures docking accuracy. Components such as coarse springs and limit blocks enhance structural stability, prevent component displacement during processing or maintenance, and reduce potential failure risks. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the external structure of the coal mine drill pipe processing production line that combines upsetting and welding processes according to the present invention.

[0019] Figure 2 is a schematic diagram of the welding assembly in the drilling pipe processing and production of the present invention.

[0020] Figure 3 is a schematic diagram of the structure of the thickening section in the drilling pipe processing of the present invention.

[0021] Figure 4 is a cross-sectional structural diagram of the thickened part of the pier in this invention.

[0022] Figure 5 is a schematic diagram of the hydraulic cylinder in the thickening section of the present invention.

[0023] Figure 6 is an enlarged structural schematic diagram of the folded strip in the thickened part of the pier section of the present invention.

[0024] Figure 7 is a cross-sectional enlarged structural schematic diagram of the limiting block in the thickening part of the present invention.

[0025] Figure 8 is a schematic diagram of the structure of the No. 2 pier base in the pier section of the present invention.

[0026] Figure 9 is a schematic diagram of the side push plate in the thickening part of the present invention.

[0027] Figure 10 is a cross-sectional view of the pressing section in the drilling pipe processing of the present invention.

[0028] Figure 11 is a longitudinal enlarged structural diagram of the sliding groove in the pressing part of the present invention.

[0029] Figure 12 is a cross-sectional enlarged schematic diagram of the inner connecting rod in the pressing part of the present invention.

[0030] In the diagram: 1. Base plate; 2. Support platform; 3. Uplift section; 4. Pressing section; 5. Support rod seat; 6. Fixed rail; 7. Motor No. 1; 8. Lead screw; 9. Motor No. 2; 10. Clamp; 11. External threaded sleeve; 31. Operating platform; 32. Positioning seat No. 1; 33. Uplift seat No. 1; 34. Positioning seat No. 2; 35. Clamping platform; 36. Hydraulic cylinder No. 1; 37. Folding bar; 38. Screw No. 1; 39. Screw No. 2; 30. Bearing sleeve; 3 01. Limiting block; 302. Notch; 303. No. 2 pier rough seat; 304. No. 1 fitting block; 305. No. 3 pier rough seat; 306. Side push plate; 307. No. 4 pier rough seat; 308. No. 2 fitting block; 309. No. 5 pier rough seat; 300. No. 2 hydraulic cylinder; 41. Bracket; 42. Hydraulic rod; 43. Sealing plug; 44. Piston rod; 45. Slide groove; 46. Spring; 47. Slip ring; 48. Outer connecting ring; 49. Inner connecting rod. Detailed Implementation

[0031] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 12. This invention provides a technical solution: Embodiment 1, as shown in Figures 1 and 2, the core load-bearing component is a base plate 1, made of high-strength steel welded together. It is used to stably support all functional components such as the support platform 2, the piercing section 3, the pressing section 4, and the support rod seat 5, ensuring the overall stability of the production line structure. A fixed rail 6 is bolted to the top of the base plate 1. The fixed rail 6 is arranged horizontally, and a No. 1 motor 7 is bolted to its outer end face. The output end of the No. 1 motor 7 passes through the fixed rail 6 and is coaxially fixedly connected to the lead screw 8 via a coupling, providing power for the feeding of the welding assembly. The other end of the lead screw 8 is rotatably mounted inside the fixed rail 6 via a bearing. The bearing is interference-fitted with the inner wall of the fixed rail 6, ensuring smooth and non-deviation-free rotation of the lead screw 8.

[0033] The outer thread of the lead screw 8 is connected to the frame, which slides and adapts internally to the fixed rail 6, allowing it to move horizontally back and forth along the fixed rail 6. A second motor 9 is bolted to the top of the frame, and the output end of the second motor 9 is connected to a clamp 10 via a coupling. The clamp 10 is used to hold the outer threaded sleeve 11, and its interior engages with the outer threaded sleeve 11. The second motor 9 drives the outer threaded sleeve 11 to rotate at high speed, coordinating with the feed motion driven by the first motor 7 to achieve friction welding between the outer threaded sleeve 11 and the drill rod. The support rod seat 5 is bolted to the base plate 1, located between the fixed rails 6, and is used to provide intermediate support for the drill rod, ensuring the stability of the drill rod's posture during welding and upsetting processes.

[0034] Example 2, as shown in Figures 1, 3, 4, 5, 6, 7, 8, and 9, the piercing section 3 is located inside the support platform 2 and is used for positioning, clamping, and shaping the piercing section of the drill rod. It includes an operating platform 31, a first positioning seat 32, a first piercing seat 33, a second positioning seat 34, a clamping platform 35, a hydraulic cylinder assembly, and limiting components. The operating platform 31 is fixedly installed inside the support platform 2 by bolts. The first positioning seat 32 is fixedly installed on its outer end face by bolts. The outer end face of the first positioning seat 32 has a fitting groove that precisely fits into the first piercing seat 33, achieving the positioning and installation of the first piercing seat 33.

[0035] The top of the inner cavity of the operating table 31 is fixedly connected to a second positioning seat 34 by a thick spring. The thick spring provides elastic restoring force, maintaining a preset distance between the second positioning seat 34 and the first positioning seat 32 in the initial state. The two work together to position and clamp the drill rod, ensuring precise alignment of the drill rod's upsetting part. A locking platform 35 is inserted into the top of the operating table 31. The locking platform 35 can be installed and removed along the reserved slot on the top of the operating table 31. A folding strip 37 is fixedly installed on the top of the locking platform 35 by bolts. The folding strip 37 has an L-shaped structure, and both it and the top of the locking platform 35 have a first threaded hole. A first screw 38 is threaded into the first threaded hole. The locking action of the first screw 38 secures the locking platform 35 to the operating table 31.

[0036] The top of the operating table 31 has a transverse groove extending into it. A first hydraulic cylinder 36 and a second hydraulic cylinder 300 are slidably fitted within the groove. The fixed end of the first hydraulic cylinder 36 is slidably fitted with the bottom of the locking platform 35, allowing it to move synchronously with the locking platform 35. A second threaded hole is provided on the outer side of the folding bar 37. A second screw 39 is threaded into the second threaded hole. A bearing sleeve 30 is bolted to the outer end face of the second screw 39. A limit block 301 is rotatably mounted on the end of the bearing sleeve 30 away from the second screw 39. The limit block 301 fits snugly against the outer side of the first hydraulic cylinder 36, limiting and positioning the movement stroke of the first hydraulic cylinder 36 to prevent displacement.

[0037] The bottom of the output end of hydraulic cylinder 36 is bolted to a fifth pier roughing seat 309. The top of the fifth pier roughing seat 309 slides and adapts to the bottom of the engagement platform 35. Its front face has a protrusion that precisely fits into a groove on the top of positioning seat 34, achieving a precise engagement and ensuring synchronous movement between the two. A notch 302 is provided at the end of the fifth pier roughing seat 309 furthest from positioning seat 34 for engagement with other pier roughing seats. There are two hydraulic cylinders 300, which are evenly arranged in the transverse groove. The bottom of the output end of one cylinder is fixedly installed with the No. 2 pier roughing seat 303, and the bottom of the output end of the other cylinder is fixedly installed with the No. 3 pier roughing seat 305. The outer end faces of the No. 2 pier roughing seat 303 and the No. 3 pier roughing seat 305 are both fixedly connected to the No. 1 fitting block 304 by welding. The No. 1 fitting block 304 fits into the notch 302 to achieve docking with the No. 5 pier roughing seat 309.

[0038] The bottom of the inner cavity of the operating platform 31 is fitted with a No. 4 pier roughing seat 307. The outer end face of the No. 4 pier roughing seat 307 is fixedly connected to the No. 2 fitting block 308 by welding. The No. 2 fitting block 308 fits into the groove opened on the outer side of the No. 1 pier roughing seat 33 to achieve docking between the two. The end of the No. 4 pier roughing seat 307 away from the No. 2 fitting block 308 is fixedly connected to the side push plate 306 by welding. The outer end face of the side push plate 306 is squeezed and fitted to the No. 2 pier roughing seat 303. The No. 4 pier roughing seat 307 can be moved synchronously by the thrust of the No. 2 pier roughing seat 303.

[0039] Example 3, as shown in Figures 1, 8, 9, 10, 11, and 12, includes a pressing part 4 located on the top of the base plate 1 and the outer side of the support platform 2, used for pressing and upsetting the end of the clamped drill rod. This part includes a bracket 41, a hydraulic rod 42, a sealing plug 43, a piston rod 44, and a linkage component. The bracket 41 is bolted to the top of the base plate 1, and the hydraulic rod 42 is bolted inside it. The hydraulic rod 42 is arranged horizontally, and a sealing plug 43 is fixedly installed inside to ensure hydraulic oil sealing and prevent leakage. The piston rod 44 is slidably fitted inside the hydraulic rod 42, and the piston rod 44 can extend and retract under the drive of the hydraulic rod 42 to apply upsetting pressure.

[0040] A groove 45 is provided on the outer side of the piston rod 44. A slip ring 47 is slidably fitted inside the groove 45. A spring 46 is fixedly connected to the outer end face of the slip ring 47 by welding. The end of the spring 46 away from the slip ring 47 is fixedly connected to the inner wall of the groove 45 to provide elastic restoring force for the slip ring 47. An outer ring 48 is rotatably mounted on the outer side of the slip ring 47 via a bearing. The outer ring 48 can rotate around the slip ring 47 to achieve posture adjustment. An inner rod 49 is inserted into the outer side of the outer ring 48. The inner rod 49 can extend and retract along the outer ring 48 to transmit thrust and adapt to different molding cavity adjustment requirements.

[0041] The purpose of the slide groove 45 and the spring 46 is that after the No. 4 pier roughing seat 307 and the No. 1 pier roughing seat 33 are connected, the piston rod 44 continues to move inward and perform pier roughing treatment. At this time, the outer ring 48 and the inner rod 49 are blocked by the No. 4 pier roughing seat 307 and compress the spring 46, and move backward relative to each other along the slide groove 45.

[0042] The working principle of this invention is as follows: First, the drill rod to be processed is placed on the support seat 5. Following the guide direction of the support seat 5, the drill rod to be upsetting portion is precisely inserted into the preset position of the upsetting portion 3. Through the cooperation structure of the cover plate and bolts, the drill rod is securely locked onto the support seat 5, ensuring no displacement deviation during subsequent processing. Then, the matching external threaded sleeve 11 is reliably clamped using the clamp 10, and motors 7 and 9 are started simultaneously. Motor 9 moves linearly forward along the fixed rail 6, driving the clamp 10 and the external threaded sleeve 11 to feed synchronously towards the drill rod. Simultaneously, the output end of motor 9 drives the external threaded sleeve 11 to rotate at high speed, causing the mating surface between the external threaded sleeve 11 and the drill rod to generate high temperature through rotational friction until it melts, ultimately achieving a firm weld between the external threaded sleeve 11 and the drill rod.

[0043] After the drill pipe welding is completed, the No. 1 hydraulic cylinder 36 is activated, and its output end drives the No. 5 upsetting seat 309, which is fixedly connected to it, to move vertically downward until it precisely fits with the No. 1 upsetting seat 33 to form a basic forming cavity. During this process, the No. 2 positioning seat 34, which is fitted with the No. 5 upsetting seat 309 through a protruding structure, moves downward accordingly, simultaneously stretching the coarse spring until the No. 2 positioning seat 34 fits and is positioned with the No. 1 positioning seat 32, completing the closed positioning of the forming cavity. Finally, the hydraulic rod 42 is activated, and its piston rod 44 extends outward and into the operating table 31, passing through the forming cavity formed by the No. 5 upsetting seat 309 and the No. 1 upsetting seat 33, applying a preset pressure to the end of the drill pipe for extrusion and shaping, ultimately achieving the upsetting process of the drill pipe end.

[0044] When the No. 5 pier roughing seat 309 is damaged due to operational errors, or the No. 1 hydraulic cylinder 36 malfunctions and cannot work properly, a quick replacement operation can be performed: First, turn the No. 2 screw 39 outward to drive the limit block 301 to move outward along the guide direction, releasing the limiting block 301 from the limiting and fixing effect of the No. 1 hydraulic cylinder 36; then, move the No. 1 hydraulic cylinder 36 and the No. 5 pier roughing seat 309 to the left as a whole until the No. 5 pier roughing seat 309 is separated from the No. 2 positioning seat 34 and precisely aligned with the locking platform 35; the operator applies force outward through the No. 1 screw 38 to disassemble the integrated structure composed of the folding strip 37, the locking platform 35, the No. 1 hydraulic cylinder 36 and the No. 5 pier roughing seat 309 from the top of the operating table 31, and then disassemble the No. 5 pier roughing seat 309 and the No. 1 hydraulic cylinder 36 for inspection. Then, except for the No. 5 pier roughing seat 309 and the No. 1 hydraulic cylinder 36, the remaining components are reset into the operating platform 31. The No. 2 hydraulic cylinder 300 is pushed forward along the transverse groove until the No. 2 pier roughing seat 303 is precisely aligned with the No. 2 positioning seat 34 and the No. 4 pier roughing seat 307 is precisely aligned with the No. 1 positioning seat 32. This completes the rapid replacement of the hydraulic cylinder and the pier roughing seat, restoring the equipment's processing capacity.

[0045] This invention can achieve two-stage adjustment of the forming cavity length through graded docking to adapt to the length requirements of different drill rod upsetting parts, as follows: 1. First stage (medium-length forming cavity): When a medium-length drill rod upsetting part needs to be processed, and the No. 5 upsetting seat 309 is not disassembled, switch the inner connecting rod 49 and the outer connecting ring 48 to the horizontal swing state, and control the inner connecting rod 49 to extend outward to the preset position; start the hydraulic rod 42, and during the process of the piston rod 44 feeding into the operating table 31, the inner connecting rod 49 presses against the side push plate. 306. The side push plate 306 drives the No. 2 pier rough seat 303 and the No. 4 pier rough seat 307 to move forward synchronously until the No. 1 fitting block 304 on the No. 2 pier rough seat 303 and the No. 2 fitting block 308 on the No. 4 pier rough seat 307 are precisely fitted into the notches 302 opened on the outer side of the No. 5 pier rough seat 309 and the No. 1 pier rough seat 33, respectively, forming the docking structure of No. 2 pier rough seat 303-No. 5 pier rough seat 309 and No. 4 pier rough seat 307-No. 1 pier rough seat 33, and finally forming a medium-length forming cavity.

[0046] 2. Second stage (long-length forming cavity): When a longer drill rod upsetting section needs to be processed, the inner connecting rod 49 and the outer connecting ring 48 are switched to a longitudinally swinging state, and the inner connecting rod 49 is controlled to retract into the outer connecting ring 48. At this time, the outer connecting ring 48 applies a thrust to the No. 3 upsetting seat 305 and its corresponding bottom upsetting seat, driving them to move forward and precisely connect with the No. 2 upsetting seat 303 and the No. 4 upsetting seat 307 that have been connected in the first stage. Then, through the transition effect of the No. 2 upsetting seat 303 and the No. 4 upsetting seat 307, they form a multi-level docking structure with the No. 5 upsetting seat 309 and the No. 1 upsetting seat 33, respectively, and finally form a long-length forming channel to meet the upsetting processing requirements of longer dimensions.

[0047] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made by those skilled in the art based on the above concepts without creative effort shall fall within the scope of protection of the present invention.

Claims

1. A coal mine drill pipe processing production line combining upsetting and welding processes, characterized in that, include: The base plate supports the various functional components of the production line; the support platform and the upsetting section are located on the base plate and inside the support platform, respectively, and are used to position and clamp the upsetting part of the drill rod; the pressing section is located on the top of the base plate and the outside of the support platform, respectively, and is used to press and upset the clamped drill rod end; the support rod seat is located on the base plate and is used to fix and support the drill rod.

2. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 1, characterized in that: A fixed rail is fixedly installed on the top of the base plate. A motor is fixedly installed on the outer end face of the fixed rail. The output end of the motor passes through the fixed rail and is connected to a lead screw through a coupling. The end face of the lead screw is rotatably installed inside the fixed rail through a bearing.

3. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 2, characterized in that: The outer thread of the lead screw is connected to the frame, which slides and adapts to the inside of the fixed rail. A second motor is fixedly installed on the top of the frame. The output end of the second motor is connected to a clamp through a coupling. An outer threaded sleeve is clamped inside the clamp. Through the coordinated work of the first and second motors, the outer threaded sleeve and the end face of the drill rod rotate and rub until they melt, thus achieving a welded connection between the two.

4. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 3, characterized in that: The piercing section includes an operating platform, which is fixedly installed inside the support platform. A first positioning seat is fixedly installed on the outer end face of the operating platform by bolts, and a first piercing seat is fitted on the outer end face of the first positioning seat. A second positioning seat is fixedly connected to the top of the inner cavity of the operating platform by a thick spring. The first and second positioning seats are used for positioning and clamping the drill rod.

5. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 4, characterized in that: A locking platform is inserted into the top of the operating table, and a folding strip is fixedly installed on the top of the locking platform. A first threaded hole is opened on the top of both the folding strip and the locking platform, and a first screw is threaded into the first threaded hole. A transverse groove is opened on the top of the operating table, and a first hydraulic cylinder and a second hydraulic cylinder are slidably adapted in the transverse groove. The fixed end of the first hydraulic cylinder is slidably adapted to the top of the locking platform.

6. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 5, characterized in that: The outer side of the folded bar is provided with a No. 2 threaded hole, and a No. 2 screw is internally threaded into the No. 2 threaded hole. A bearing sleeve is fixedly installed on the outer end face of the No. 2 screw. A limit block is rotatably installed on the end of the bearing sleeve away from the No. 2 screw. The limit block is used to limit and position the movement stroke of the No. 1 hydraulic cylinder. A No. 5 jacking seat is fixedly installed at the bottom of the output end of the No. 1 hydraulic cylinder. The top of the No. 5 jacking seat is slidably adapted to the bottom of the locking platform. The outer end face of the No. 5 jacking seat is provided with a protrusion. The protrusion is fitted into a groove on the top of the No. 2 positioning seat to achieve the fitting and docking of the two.

7. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 6, characterized in that: The fifth pier roughing seat has a notch at one end away from the second positioning seat; there are two second hydraulic cylinders, one of which has the second pier roughing seat fixedly installed at the bottom of its output end, and the other has the third pier roughing seat fixedly installed at the bottom of its output end. The outer end faces of the second and third pier roughing seats are fixedly connected to the first fitting block, and the first fitting block fits into the notch.

8. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 7, characterized in that: The bottom of the inner cavity of the operating platform is slidably fitted with a No. 4 roughing seat. The outer end face of the No. 4 roughing seat is fixedly connected to a No. 2 fitting block. The No. 2 fitting block is fitted into a groove on the outer side of the No. 1 roughing seat to achieve docking between the two. The end of the No. 4 roughing seat away from the No. 2 fitting block is fixedly connected to a side push plate. The outer end face of the side push plate is pressed and fitted with the No. 2 roughing seat.

9. The coal mine drill pipe processing production line combining upsetting and welding processes according to claim 8, characterized in that: The pressing part includes a bracket, a hydraulic rod is fixedly installed inside the bracket, a sealing plug is fixedly installed inside the hydraulic rod, a piston rod is slidably adapted inside the hydraulic rod, a groove is formed on the outer side of the piston rod, a slip ring is slidably adapted inside the groove, a spring is fixedly connected to the outer end face of the slip ring, and the end of the spring away from the slip ring is fixedly connected to the inner wall of the groove; an outer connecting ring is rotatably installed on the outer side of the slip ring through a bearing, and an inner connecting rod is inserted into the outer side of the outer connecting ring.

10. A method for processing coal mine drill pipes combining upsetting and welding processes, used in the coal mine drill pipe processing production line combining upsetting and welding processes as described in claim 9, characterized in that, The process includes the following steps: Step 1: First, place the drill rod to be processed on the support seat, accurately feed it into the upsetting position, and tighten it with the cover plate bolts. Start motors 1 and 2. Motor 2 drives the rotating external threaded sleeve to feed towards the drill rod. Through rotational friction, the mating surface melts, achieving a firm weld between the external threaded sleeve and the drill rod. Step 2: After welding is completed, hydraulic cylinder 1 drives upsetting seat 5 to move down, forming a forming cavity with upsetting seat 1. At the same time, positioning seat 2 moves down synchronously for positioning. Start the hydraulic rod, and the piston rod extends into the forming cavity to apply pressure to the end of the drill rod for shaping, completing the upsetting process. Step 3: When the No. 5 pier roughing seat or the No. 1 hydraulic cylinder fails, loosen the No. 2 screw to release the limit, move and remove the faulty part for repair, push the No. 2 hydraulic cylinder to the corresponding position, so that the No. 2 and No. 4 pier roughing seats are respectively connected to the positioning seats, and quickly complete the replacement to restore the equipment operation; Step 4: The equipment adjusts the forming cavity length in stages: for medium length, the inner connecting rod is horizontally placed to push the No. 2 and No. 4 pier roughing seats to connect with the corresponding parts to form a long forming channel to meet the requirements. For long length, the inner connecting rod is longitudinally retracted, and the No. 3 pier roughing seat and other multi-stage connections are driven by the outer connecting ring to form a long forming channel to meet the requirements.

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