Process for eliminating fine cracks on surface of stainless steel seamless steel pipe and processing equipment thereof

Abstract

The invention relates to the technical field of stainless steel seamless steel pipes, in particular to a stainless steel seamless steel pipe surface fine crack eliminating technology and machining equipment thereof. A connecting frame is included, a positioning mechanism is fixedly connected to the inner side of the connecting frame, and grinding mechanisms are arranged on the front side and the rear side of the positioning mechanism; through the arrangement of the connecting frame, the positioning mechanism and the grinding mechanism, efficient and accurate elimination of fine cracks on the surface of the stainless steel seamless steel pipe is achieved, through a well-designed mechanical transmission structure, automatic cooperative operation of the positioning mechanism and the grinding mechanism is achieved, the treatment efficiency is greatly improved, and the production cost is reduced. The technology and the machining equipment can meet the treatment requirements of steel pipes of different specifications and have wide applicability and flexibility, meanwhile, crack grinding and surface polishing can be completed at a time through the unique double-grinding-mechanism design of the technology and the machining equipment, the treatment period is effectively shortened, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of stainless steel seamless pipe technology, and more specifically, to a process for eliminating fine cracks on the surface of stainless steel seamless pipe and its processing equipment. Background Technology

[0002] Stainless steel seamless pipes are steel pipes made from a single piece of metal without any seams on their surface. They have a hollow cross-section and are widely used as pipelines for transporting fluids such as oil, natural gas, coal gas, water, and certain solid materials. Compared with solid steel materials such as round steel, they are lighter in weight while maintaining the same bending and torsional strength, making them an economical cross-section steel material. They are widely used in the manufacture of structural components and mechanical parts. However, during the production and use of stainless steel seamless pipes, fine cracks may appear on the surface. These fine cracks not only affect the appearance quality of the steel pipe but also reduce its mechanical properties and corrosion resistance. Therefore, effective treatment is needed to eliminate them.

[0003] According to patent document CN115178964B, a process for eliminating fine cracks on the surface of stainless steel seamless pipes is disclosed, including the following steps: Step 1, cleaning the stainless steel seamless pipe; Step 2, preheating the stainless steel seamless pipe, sealing both ends of the stainless steel seamless pipe, and then sending it into a constant-temperature aluminum liquid pool; Step 3, placing the stainless steel seamless pipe in the aluminum liquid pool and repeatedly scraping the surface of the stainless steel seamless pipe; Step 4, slowly lifting the stainless steel seamless pipe from the aluminum liquid pool and continuing to repeatedly scrape the surface of the stainless steel seamless pipe; Step 5, removing the stainless steel seamless pipe from the aluminum liquid pool and sending it into an induction furnace; Step 6, outputting the stainless steel seamless pipe, cooling, grinding, and polishing to complete the elimination of fine cracks. A matching device is also provided, which can mechanize and automate the above process. The process and equipment of this invention will not significantly affect the outer diameter, wall thickness, and performance of the steel pipe, and can effectively improve the efficiency of fine crack repair and elimination.

[0004] When eliminating fine cracks on the surface of stainless steel seamless pipes, repeated fine grinding operations are usually required on the outer surface, followed by polishing to further improve its surface smoothness. Currently, common grinding and polishing methods often only treat a specific area of ​​the pipe at a time. Therefore, when the entire outer surface of the pipe needs to be ground and polished, operators must repeatedly adjust the placement and angle of the pipe. This process is not only cumbersome and time-consuming but also significantly reduces overall work efficiency. Furthermore, if manual grinding and polishing is used, differences in operator skill and stability can easily lead to uneven force application, improper tool use, or inaccurate process parameter control, resulting in new scratches, abrasions, or other forms of surface damage. Such secondary damage not only directly affects the appearance quality of the stainless steel seamless pipe but may also further weaken its corrosion resistance, mechanical strength, and service life, thus causing a significant negative impact on the overall quality and performance of the pipe. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, this invention provides a process and equipment for eliminating fine cracks on the surface of seamless stainless steel pipes. The technical problem to be solved by this invention is that repeatedly adjusting the placement and angle of the steel pipe is not only cumbersome and time-consuming, but also significantly reduces the overall efficiency of the operation. In addition, if manual operation is used for grinding and polishing, due to differences in the operator's skill level and stability, it is easy to cause new scratches, abrasions or other forms of surface damage to the steel pipe surface due to uneven force application, improper tool use or inaccurate control of process parameters.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A processing device for eliminating fine cracks on the surface of stainless steel seamless pipe includes a connecting frame, a positioning mechanism fixedly connected to the inner side of the connecting frame, and a grinding mechanism provided on both the front and rear sides of the positioning mechanism. The connecting frame includes two side plates. L-shaped blocks are fixedly connected to the top and bottom of the inner front side of the two side plates. Guide rods are fixedly connected to the front side of the two side plates. Transmission wheels are fixedly connected to the three sides of the inner side of the left and right sets of L-shaped blocks. Lifting transmission tracks are fitted on the outer walls of the two sets of transmission wheels on the left and the two sets of transmission wheels on the right. The positioning mechanism includes a T-shaped connecting plate, and U-shaped connecting plates are fixedly connected to both sides of the bottom center of the T-shaped connecting plate. Positioning components are fixedly connected to the bottom of the two U-shaped connecting plates. Both of the grinding mechanisms include C-shaped sliding plates, and C-shaped connecting plates are fixedly connected to the inner side of both C-shaped sliding plates. C-shaped toothed discs are rotatably connected to the outer wall of both C-shaped sliding plates.

[0007] As a further embodiment of the present invention: a horizontal connecting plate is fixedly connected to the top of the inner rear side of the two side upright plates; a columnar transmission rod is fixedly connected to the inner side of the two transmission wheels on the top rear side; a motor is fixedly connected to the middle of the top of the horizontal connecting plate; a transmission shaft is fixedly connected to the output end of the motor; a track is fitted on the outer wall of the transmission shaft; a second transmission shaft is fitted on the front side of the inner wall of the track; the inner wall of the second transmission shaft is fixedly connected to the middle of the outer wall of the columnar transmission rod; and a supporting base plate is fixedly connected to the bottom of both side upright plates.

[0008] As a further embodiment of the present invention: concave sliders are slidably connected to the top front side of each of the two guide pillars, lifting plates are fixedly connected to the front side of each of the two concave sliders, track connecting blocks are fixedly connected to the middle rear side of each of the two concave sliders, the inner walls of the two track connecting blocks are fixedly connected to the top of the outer front wall of each of the two lifting transmission tracks, and the top of the inner side of each of the two lifting plates are fixedly connected to the rear side of the left and right sides of the T-shaped connecting plate.

[0009] As a further aspect of the present invention: the positioning component includes a positioning frame, and clamping members are fixedly connected to both the front and rear sides of the inner side of the positioning frame.

[0010] As a further embodiment of the present invention: the positioning frame includes two concave plates, the tops of the two concave plates are fixedly connected to the bottoms of two U-shaped connecting plates, an electric push rod connecting rod is fixedly connected to the middle of the tops of the two concave plates, an electric push rod is fixedly connected to the inner side of the two electric push rod connecting rods, columnar uprights are fixedly connected to the front and rear sides of the bottoms of the two concave plates, and uprights are fixedly connected to the front and rear sides and the front and rear sides of the inner sides of the two concave plates, C-shaped guide plates are fixedly connected to the bottoms of the two sets of uprights on the left and the two sets of uprights on the right, the tops of the two sets of C-shaped guide plates are fixedly connected to the bottom ends of the two sets of columnar uprights on the left and right, and a push-pull plate is fixedly connected to the bottom end of the electric push rod.

[0011] As a further embodiment of the present invention: both clamping members include a top connecting block, the left and right sides of the two top connecting blocks are fixedly connected to the front and rear sides of the inner side of the two concave plates, the four sides of the bottom of the two top connecting blocks are fixedly connected to columnar vertical connecting rods, the bottom of the two sets of columnar vertical connecting rods on the front side and the bottom of the two sets of columnar vertical connecting rods on the rear side are fixedly connected to L-shaped side connecting blocks, the inner side of the two sets of L-shaped side connecting blocks is fixedly connected to a bottom block, the front and rear sides of the bottom of the two bottom blocks are fixedly connected to hinged side blocks, the top center of the two bottom blocks is fixedly connected to a guide column, the front and rear sides of the bottom of the two top connecting blocks are fixedly connected to columnar vertical guide rods, and the bottom ends of the two sets of columnar vertical guide rods are fixedly connected to the center of the top of the two sets of L-shaped side connecting blocks.

[0012] As a further embodiment of the present invention: a cross-shaped lifting block is slidably connected to the top of the outer wall of each of the two guide columns; the inner walls of the front and rear sides of the two cross-shaped lifting blocks are slidably connected to the outer walls of the two sets of columnar guide rods; a connecting block is fixedly connected to the outer side of each of the two top connecting blocks; a side guide plate is fixedly connected to the left and right sides of each of the two connecting blocks; and the inner sides of the two cross-shaped lifting blocks are fixedly connected to the front and rear sides of the push-pull plate.

[0013] As a further embodiment of the present invention: arc-shaped rotating plates are rotatably connected to the left and right sides of the two cross-shaped lifting blocks; concave hinge blocks are rotatably connected to the bottom of the two sets of arc-shaped rotating plates; rotating plates are rotatably connected to the inner sides of the two sets of concave hinge blocks; the outer walls of the two sets of rotating plates on the front side and the two sets of rotating plates on the rear side, away from the concave hinge blocks, are rotatably connected to the inner sides of the two sets of hinge blocks on the front and rear sides; arc-shaped clamping plates are fixedly connected to the outer sides of the two sets of concave hinge blocks; and multiple rotating wheels are rotatably connected to the inner sides of the two sets of arc-shaped clamping plates.

[0014] As a further embodiment of the present invention: Inverted L-shaped connecting plates are fixedly connected to both sides of the top center of the outer walls of the two C-shaped connecting plates; the rear sides of the inner tops of the two sets of inverted L-shaped connecting plates are fixedly connected to the left and right sides of the outer sides of the two cross-shaped lifting blocks; the outer sides of the two sets of inverted L-shaped connecting plates are rotatably connected to the inner sides of the two sets of side guide plates; sliding plates are fixedly connected to the top of the outer sides of the two sets of inverted L-shaped connecting plates; the inner sides of the two sets of sliding plates are slidably connected to the top of the outer sides of the two sets of side guide plates; L-shaped connecting blocks are fixedly connected to one side of the outer walls of the two C-shaped connecting plates; transmission rods are rotatably connected to the inner walls of the two L-shaped connecting blocks; gears are fixedly connected to the outer ends of the two transmission rods; the outer walls of the two gears mesh with the outer walls of the two C-shaped gear discs; transmission discs are fixedly connected to the inner ends of the two transmission rods; and the right sides of the outer walls of the two C-shaped connecting plates are fixedly connected to... A second L-shaped connecting block is fixedly connected to each of the two second L-shaped connecting blocks. A second motor is fixedly connected to the right side of each of the two second motors. A second transmission rod is fixedly connected to the output end of each of the two second motors. A second transmission disc is fixedly connected to the outer wall of each of the two second transmission rods. A second track is fitted onto the outer wall of each of the two second transmission discs. The inner wall of each of the two second tracks, away from the second transmission disc, fits onto the outer wall of each of the two transmission discs. A second gear is fixedly connected to the outer end of each of the two second transmission rods. The outer wall of each of the two second gears meshes with the outer wall of each of the two C-shaped gear discs, away from the gear. A grinding disc C-shaped connecting plate is fixedly connected to the outer side of each of the two C-shaped gear discs. A grinding disc electric push-pull rod is fixedly connected to the outer side of each of the two grinding disc C-shaped connecting plates in a circular array. A grinding disc is fixedly connected to the inner side of the multiple grinding disc electric push-pull rods on the front side. A polishing disc is fixedly connected to the inner side of the multiple grinding disc electric push-pull rods on the rear side.

[0015] In addition, the present invention also relates to a process for eliminating fine cracks on the surface of stainless steel seamless pipes, comprising the following steps: Step 1: When it is necessary to eliminate fine surface cracks in the steel pipe, start the motor, and drive the second drive shaft to rotate through the drive shaft and the track, which in turn drives the columnar transmission rod to rotate. Step 2: The columnar transmission rod rotates to drive the left and right sets of transmission wheels to rotate synchronously. The rotation of the transmission wheels drives the lifting transmission track to rotate, causing the track connecting block to move up and down. Step 3: The track connecting block moves up and down, causing the concave slider to slide on the guide rod. The sliding of the concave slider causes the lifting plate to move up and down, thereby driving the positioning mechanism to move, so that the grinding mechanism moves to the appropriate detection position. Step 4: Insert the steel pipe into the inside of the two sets of arc-shaped clamping plates and the two grinding mechanisms; Step 5: Activate the electric push rod to push the push-pull plate downwards, causing the two cross-shaped lifting blocks to slide downwards along the columnar guide rod; Step 6: The cross lifting block slides down, causing the arc-shaped rotating plate to rotate downwards, pushing the concave hinge block to move inwards. The two sets of arc-shaped clamping plates gradually approach and fit against the surface of the steel pipe, while simultaneously driving the two grinding mechanisms to move downwards, so that their inner walls fit against the outer walls of the steel pipe. Step 7: Activate the electric push-pull rods of multiple grinding discs to push the two sets of grinding discs to fit against the outer wall of the steel pipe. The entire device moves along the trajectory of the steel pipe. Start the second motor to make the grinding discs rotate to grind the fine cracks on the surface of the steel pipe. Step 8: The rear grinding mechanism is activated. The polishing disc is pushed against the outer wall of the steel pipe by the electric push-pull rod of the grinding disc to perform fine polishing treatment on the tiny traces left after grinding.

[0016] The beneficial effects of this invention are as follows: This invention, by incorporating a connecting frame, a positioning mechanism, and a grinding mechanism, achieves efficient and precise elimination of fine cracks on the surface of seamless stainless steel pipes. Through a meticulously designed mechanical transmission structure, the positioning and grinding mechanisms operate in an automated, coordinated manner, significantly improving processing efficiency and ensuring the stability and consistency of processing quality. This process and equipment can adapt to the processing needs of steel pipes of different specifications, exhibiting wide applicability and flexibility. Furthermore, its unique dual grinding mechanism design allows crack grinding and surface polishing to be completed in one step, effectively shortening the processing cycle and reducing production costs, thus providing strong technical support for the production and processing of seamless stainless steel pipes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional separation structure of the main body of the present invention; Figure 3 This is a three-dimensional structural diagram of the connecting frame of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation structure of the connecting frame of the present invention; Figure 5 This is a three-dimensional structural diagram of the positioning mechanism and grinding mechanism of the present invention; Figure 6 This is a schematic diagram of the three-dimensional separation structure of the positioning mechanism and the grinding mechanism of the present invention; Figure 7 This is a schematic diagram of the three-dimensional separation structure of the positioning component of the present invention; Figure 8 This is a three-dimensional structural diagram of the positioning frame of the present invention; Figure 9 This is a schematic diagram of the three-dimensional separation structure of a single clamping component of the present invention; Figure 10 This is a three-dimensional structural diagram of a single grinding mechanism of the present invention.

[0018] In the diagram: 1. Connecting frame; 11. Side upright plate; 12. L-shaped block; 13. Guide column; 14. Drive wheel; 15. Lifting drive track; 16. Horizontal connecting plate; 17. Columnar transmission rod; 18. Motor; 19. Drive shaft; 110. Track; 111. Second drive shaft; 112. Support base plate; 113. Concave slider; 114. Lifting plate; 115. Track connecting block; 2. Positioning mechanism; 21. T-shaped connecting plate 22. U-shaped connecting plate; 23. Positioning assembly; 231. Positioning frame; 2311. Concave plate; 2312. Electric push rod connecting rod; 2313. Electric push rod; 2314. Upright pole; 2315. Column-shaped upright pole; 2316. C-shaped guide plate; 2317. Push-pull plate; 232. Clamping component; 2321. Top connecting block; 2322. Column-shaped vertical connecting rod; 2323. L-shaped side connecting block; 2324. Bottom block; 2325. Columnar guide rod; 2326. Guide column; 2327. Connecting block; 2328. Cross-shaped lifting block; 2329. Hinge side block; 23210. Arc-shaped rotating plate; 23211. Concave hinge block; 23212. Rotating plate; 23213. Arc-shaped clamping plate; 23214. Rotating wheel; 23215. Side guide plate; 3. Grinding mechanism; 31. C-shaped sliding plate; 32. C-shaped connecting plate; 33. 34. Inverted L-shaped connecting plate; 35. Sliding plate; 36. L-shaped connecting block; 37. Transmission rod; 38. Gear; 39. Transmission disc; 30. Second L-shaped connecting block; 310. Second motor; 311. Second transmission rod; 312. Second gear; 313. Second transmission disc; 314. Second track; 315. C-shaped gear disc; 316. Grinding disc C-shaped connecting plate; 317. Grinding disc electric push-pull rod; 318. Grinding disc. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1-2 As shown, the present invention provides a processing equipment for eliminating fine cracks on the surface of stainless steel seamless pipe, including a connecting frame 1, a positioning mechanism 2 fixedly connected to the inner side of the connecting frame 1, and a grinding mechanism 3 provided on both the front and rear sides of the positioning mechanism 2.

[0021] like Figure 3-4As shown, the connecting frame 1 includes two side uprights 11. L-shaped blocks 12 are fixedly connected to the top and bottom of the inner front sides of both side uprights 11. Guide rods 13 are fixedly connected to the front sides of both side uprights 11. Drive wheels 14 are fixedly connected to the three sides of the inner sides of the left and right sets of L-shaped blocks 12. Lifting drive tracks 15 are fitted onto the outer walls of the two sets of left and right drive wheels 14. A horizontal connecting plate 16 is fixedly connected to the top of the inner rear sides of both side uprights 11. A columnar transmission rod 17 is fixedly connected to the inner side of the two rear drive wheels 14. A motor 18 is fixedly connected to the middle of the top of the horizontal connecting plate 16. A drive shaft 19 is fixedly connected to the output end of the motor 18. A drive shaft 19 is fitted onto the outer wall of the drive shaft 19. Track 110, with a second drive shaft 111 fitted on the front side of the inner wall of track 110. The inner wall of the second drive shaft 111 is fixedly connected to the middle of the outer wall of the columnar transmission rod 17. The bottom of the two side plates 11 are fixedly connected to the support base plate 112. The front top of the two guide rods 13 are slidably connected to the concave slider 113. The front side of the two concave sliders 113 is fixedly connected to the lifting plate 114. The rear middle of the two concave sliders 113 is fixedly connected to the track connecting block 115. The inner wall of the two track connecting blocks 115 is fixedly connected to the top of the front outer wall of the two lifting transmission tracks 15. The top of the inner side of the two lifting plates 114 is fixedly connected to the rear side of the left and right sides of the T-shaped connecting plate 21. When it is necessary to eliminate fine surface cracks on the steel pipe, the motor 18 is first started, which drives the track 110 through the drive shaft 19 to rotate the second drive shaft 111. Then, the second drive shaft 111 drives the columnar transmission rod 17 to rotate. The rotation of the columnar transmission rod 17 drives the left and right sets of transmission wheels 14 to rotate synchronously. The rotation of the transmission wheels 14 will drive the lifting transmission track 15 to rotate. Since the track connecting block 115 is fixedly connected to the top of the front outer wall of the lifting transmission track 15, the operation of the lifting transmission track 15 will drive the track connecting block 115 to move up and down. The up and down movement of the track connecting block 115 will drive the concave slider 113 to slide on the guide rod 13. The sliding of the concave slider 113 will drive the lifting plate 114 to move up and down, thereby driving the positioning mechanism 2 to move. The movement of the positioning mechanism 2 will cause the grinding mechanism 3 set on its front and rear sides to move to the appropriate detection position.

[0022] like Figure 5-9As shown, the positioning mechanism 2 includes a T-shaped connecting plate 21. U-shaped connecting plates 22 are fixedly connected to both sides of the bottom center of the T-shaped connecting plate 21. Positioning components 23 are fixedly connected to the bottom of the two U-shaped connecting plates 22. The positioning component 23 includes a positioning frame 231. Clamping members 232 are fixedly connected to the front and rear sides of the inner side of the positioning frame 231. The positioning frame 231 includes two concave plates 2311. The tops of the two concave plates 2311 are fixedly connected to the bottom of the two U-shaped connecting plates 22. Electric push rod connecting rods 2312 are fixedly connected to the center of the tops of the two concave plates 2311. Electric push rods 2313 are fixedly connected to the inner sides of the two electric push rod connecting rods 2312. The front and rear sides of the bottom of the two concave plates 2311 are fixedly connected to the positioning components 2311. A columnar upright 2315 is fixedly connected. Uprights 2314 are fixedly connected to the front and rear sides and the front and rear sides of the inner side of two concave plates 2311. C-shaped guide plates 2316 are fixedly connected to the bottom of the two sets of uprights 2314 on the left and the bottom of the two sets of uprights 2314 on the right. The top center of the two sets of C-shaped guide plates 2316 is fixedly connected to the bottom end of the two sets of columnar uprights 2315. A push-pull plate 2317 is fixedly connected to the bottom end of the electric push rod 2313. Both clamping parts 232 include top connecting blocks 2321. The left and right sides of the two top connecting blocks 2321 are fixedly connected to the front and rear sides of the inner side of the two concave plates 2311. Columnar upright connecting rods are fixedly connected to the four sides of the bottom of the two top connecting blocks 2321. 2322, L-shaped side connecting blocks 2323 are fixedly connected to the bottom of the two sets of columnar vertical connecting rods 2322 on the front side and the bottom of the two sets of columnar vertical connecting rods 2322 on the rear side. Base blocks 2324 are fixedly connected to the inner sides of the two sets of L-shaped side connecting blocks 2323. Hinged side blocks 2329 are fixedly connected to the front and rear sides of the bottom of the two base blocks 2324. Guide columns 2326 are fixedly connected to the top center of the two base blocks 2324. Columnar guide rods 2325 are fixedly connected to the front and rear sides of the bottom of the two top connecting blocks 2321. The bottom ends of the two sets of columnar guide rods 2325 are fixedly connected to the center of the top of the two sets of L-shaped side connecting blocks 2323. The top of the outer walls of the two guide columns 2326 are slidably connected. There are two cross-shaped lifting blocks 2328. The inner walls of the front and rear sides of the two cross-shaped lifting blocks 2328 are slidably connected to the outer walls of two sets of columnar guide rods 2325. The outer sides of the two top connecting blocks 2321 are fixedly connected to connecting blocks 2327. The left and right sides of the two connecting blocks 2327 are fixedly connected to side guide plates 23215. The inner sides of the two cross-shaped lifting blocks 2328 are fixedly connected to the front and rear sides of the push-pull plate 2317. The left and right sides of the two cross-shaped lifting blocks 2328 are rotatably connected to arc-shaped rotating plates 23210. The bottom of the two sets of arc-shaped rotating plates 23210 are rotatably connected to concave hinge blocks 23211. The inner sides of the two sets of concave hinge blocks 23211 are rotatably connected to rotating plates 23212.The outer walls of the two sets of rotating plates 23212 on the front and the two sets of rotating plates 23212 on the rear, away from the concave hinge blocks 23211, are rotatably connected to the inner sides of the two sets of hinge side blocks 2329. Arc-shaped clamping plates 23213 are fixedly connected to the outer sides of the two sets of concave hinge blocks 23211, and multiple rotating wheels 23214 are rotatably connected to the inner sides of the two sets of arc-shaped clamping plates 23213. After the positioning mechanism 2 and the grinding mechanism 3 are moved to the appropriate position, the steel pipe is inserted into the inner side of the two sets of arc-shaped clamping plates 23213 and the two grinding mechanisms 3. After this step is completed, the electric push rod 2313 is started, which pushes the push-pull plate 2317 downward. As the push-pull plate 2317 moves downward, it drives the two cross lifting blocks 2328 to slide downward along the columnar vertical guide rod 2325. As the cross-shaped lifting block 2328 slides down, the arc-shaped rotating plates 23210 connected to its left and right sides rotate downwards. This rotation further pushes the concave hinge block 23211 to move inwards. When the concave hinge block 23211 moves inwards, the rotating plate 23212, in coordination with the hinge side block 2329, further pushes the concave hinge block 23211 to converge inwards. This series of actions causes the two sets of arc-shaped clamping plates 23213 to gradually approach and adhere to the surface of the steel pipe. The multiple rotating wheels 23214 connected to the inner side of the arc-shaped clamping plates 23213 adhere to the outer wall of the steel pipe, thus ensuring that the entire device does not misalign when moving during steel pipe grinding. At the same time, when the two cross-shaped lifting blocks 2328 move downward, they in turn drive the two grinding mechanisms 3 to move downward, which causes the inner wall of the grinding mechanism 3 to fit onto the outer wall of the steel pipe.

[0023] like Figure 10As shown, both grinding mechanisms 3 include C-shaped sliding plates 31. C-shaped connecting plates 32 are fixedly connected to the inner sides of both C-shaped sliding plates 31. C-shaped gear discs 315 are rotatably connected to the outer walls of both C-shaped sliding plates 31. Inverted L-shaped connecting plates 33 are fixedly connected to both sides of the top center of the outer walls of both C-shaped connecting plates 32. The rear sides of the inner top of the two sets of inverted L-shaped connecting plates 33 are fixedly connected to the left and right sides of the outer sides of the two cross-shaped lifting blocks 2328. The outer sides of the two sets of inverted L-shaped connecting plates 33 are rotatably connected to the two sets of side guide plates 23215. Inside, sliding plates 34 are fixedly connected to the top of the outer sides of both sets of inverted L-shaped connecting plates 33. The inner sides of both sets of sliding plates 34 are slidably connected to the top of the outer sides of both sets of side guide plates 23215. L-shaped connecting blocks 35 are fixedly connected to one side of the outer wall of both C-shaped connecting plates 32. Transmission rods 36 are rotatably connected to the inner walls of both L-shaped connecting blocks 35. Gears 37 are fixedly connected to the outer ends of both transmission rods 36. The outer walls of both gears 37 mesh with the outer walls of both C-shaped gear discs 315. The inner ends of both transmission rods 36 are fixedly connected to... There is a transmission disc 38. Two second L-shaped connecting blocks 39 are fixedly connected to the right side of the outer wall of each of the two C-shaped connecting plates 32. Two second motors 310 are fixedly connected to the right side of each of the two second L-shaped connecting blocks 39. Second transmission rods 311 are fixedly connected to the output ends of each of the two second motors 310. Second transmission discs 313 are fixedly connected to the outer walls of each of the two second transmission rods 311. Second tracks 314 are fitted onto the outer walls of each of the two second transmission discs 313. The inner walls of each of the two second tracks 314, away from the second transmission discs 313, are fitted onto the outer walls of the two transmission discs 38. Each of the second transmission rods 311 has a second gear 312 fixedly connected to its outer end. The outer walls of the two second gears 312 mesh with the outer walls of the two C-shaped gear discs 315 on the side away from the gear 37. The outer sides of the two C-shaped gear discs 315 are fixedly connected to a grinding disc C-shaped connecting plate 316. The outer sides of the two grinding disc C-shaped connecting plates 316 are fixedly connected to a grinding disc electric push-pull rod 317 in a circular array. The inner sides of the multiple grinding disc electric push-pull rods 317 on the front side are fixedly connected to a grinding disc 318. The inner sides of the multiple grinding disc electric push-pull rods 317 on the rear side are polishing discs. After the steel pipe is limited by the positioning component 23 and fitted onto the inner wall of the two grinding mechanisms 3, the multiple electric push-pull rods 317 on the outer side of the two grinding disc C-shaped connecting plates 316 are activated to push the two sets of grinding discs 318 to fit against the outer wall of the steel pipe. Then, the entire device moves along the trajectory of the steel pipe. At the same time, the second motor 310 on the right side of the second L-shaped connecting block 39 of the two grinding mechanisms 3 is activated. The second motor 310 drives the second transmission rod 311 to rotate. The second transmission disc 313 drives the second gear 312 to rotate. The second transmission disc 313 drives the transmission disc 38 to rotate via the second track 314. The transmission disc 38 drives the short transmission rod 36 to rotate, and the short transmission rod 36 drives the gear 37 to rotate. Since both the gear 37 and the second gear 312 mesh with the outer wall of the C-shaped gear disc 315, the C-shaped gear disc 315 rotates on the outer wall of the C-shaped slide plate 31. The C-shaped gear disc 315 drives the grinding disc C-shaped connecting plate 316 to rotate. 316 drives the electric push-pull rod 317 and the grinding disc 318 to rotate, so that the grinding disc 318 can efficiently grind the fine cracks on the surface of the steel pipe by rotating after it is attached to the outer wall of the steel pipe. This effectively removes burrs and uneven parts at the cracks and improves the surface smoothness of the steel pipe. At the same time, the rear grinding mechanism 3 is activated. The polishing disc in the rear grinding mechanism 3 is attached to the outer wall of the steel pipe by being pushed by multiple electric push-pull rods 317. Its working mode is the same as that of the front grinding disc 318. The rotation of the polishing disc can perform fine polishing on the tiny traces left after grinding the fine cracks on the surface of the steel pipe, further eliminating surface roughness and making the surface of the steel pipe reach a higher standard of flatness and smoothness. When the two grinding mechanisms work together, the front grinding disc 318 completes the crack grinding and initial flattening, and the rear polishing disc performs secondary polishing, forming a complete surface treatment process. This ensures that the fine cracks on the surface of the stainless steel seamless pipe are completely eliminated and the overall quality meets the requirements of industrial production.

[0024] In addition, the present invention also relates to a process for eliminating fine cracks on the surface of stainless steel seamless pipes, comprising the following steps: Step 1: When it is necessary to eliminate fine surface cracks in the steel pipe, start the motor 18, which drives the crawler 110 through the drive shaft 19 to rotate the second drive shaft 111, which in turn drives the columnar transmission rod 17 to rotate. Step 2: The columnar transmission rod 17 rotates to drive the two sets of transmission wheels 14 to rotate synchronously. The rotation of the transmission wheels 14 drives the lifting transmission track 15 to rotate, causing the track connecting block 115 to move up and down. Step 3: The track connecting block 115 moves up and down, causing the concave slider 113 to slide on the guide rod 13. The sliding of the concave slider 113 causes the lifting plate 114 to move up and down, thereby driving the positioning mechanism 2 to move, so that the grinding mechanism 3 moves to the appropriate detection position. Step 4: Insert the steel pipe into the inside of the two sets of arc-shaped clamping plates 23213 and the two grinding mechanisms 3; Step 5: Activate the electric push rod 2313 to push the push-pull plate 2317 downward, causing the two cross lifting blocks 2328 to slide downward along the columnar vertical guide rod 2325; Step 6: The cross lifting block 2328 slides down, causing the arc-shaped rotating plate 23210 to rotate downwards, pushing the concave hinge block 23211 to move inwards. The two sets of arc-shaped clamping plates 23213 gradually approach and fit against the surface of the steel pipe, while driving the two grinding mechanisms 3 to move downwards, so that their inner walls fit against the outer walls of the steel pipe. Step 7: Start the electric push-pull rod 317 of multiple grinding discs to push the two sets of grinding discs 318 to fit against the outer wall of the steel pipe. The whole device moves along the trajectory of the steel pipe. Start the second motor 310 to make the grinding discs 318 rotate to grind the fine cracks on the surface of the steel pipe. Step 8: The rear grinding mechanism 3 is activated. The polishing disc is pushed against the outer wall of the steel pipe by the electric push-pull rod 317 of the grinding disc, and the tiny traces left after grinding are finely polished.

[0025] Working principle of this invention: When it is necessary to eliminate fine surface cracks in steel pipes, the motor 18 is first started, which drives the track 110 through the drive shaft 19 to rotate the second drive shaft 111. The second drive shaft 111 then drives the columnar transmission rod 17 to rotate, which in turn drives the left and right sets of transmission wheels 14 to rotate synchronously. The rotation of the transmission wheels 14 drives the lifting transmission track 15 to rotate. Since the track connecting block 115 is fixedly connected to the top of the front outer wall of the lifting transmission track 15, the operation of the lifting transmission track 15 causes the track connecting block 115 to move up and down. The up and down movement of the track connecting block 115 causes the concave slider 113 to slide on the guide rod 13. The sliding of the concave slider 113 then causes the lifting plate 114 to move up and down. The movement of the positioning mechanism 2 causes the grinding mechanism 3 located on its front and rear sides to move to the appropriate detection position. After the positioning mechanism 2 and the grinding mechanism 3 are moved to the appropriate position, the steel pipe is inserted into the inner side of the two sets of arc-shaped clamping plates 23213 and the two grinding mechanisms 3. After this step is completed, the electric push rod 2313 is activated, which pushes the push-pull plate 2317 downward. As the push-pull plate 2317 moves downward, it drives the two cross lifting blocks 2328 to slide downward along the columnar vertical guide rod 2325. During the downward movement of the cross lifting blocks 2328, the arc-shaped rotating plates 23210 connected to its left and right sides rotate downward. This rotation further pushes the concave hinge block 2 3211 moves inward. When the concave hinge block 23211 moves inward, the rotating plate 23212, in coordination with the hinge side block 2329, further pushes the concave hinge block 23211 inward. This series of actions causes the two sets of arc-shaped clamping plates 23213 to gradually approach and adhere to the surface of the steel pipe. The multiple rotating wheels 23214 rotatably connected to the inner side of the arc-shaped clamping plates 23213 adhere to the outer wall of the steel pipe. At the same time, when the two cross lifting blocks 2328 move downward, they in turn drive the two grinding mechanisms 3 to move downward. This action causes the inner wall of the grinding mechanism 3 to fit onto the outer wall of the steel pipe. The steel pipe is limited by the positioning component 23 and, after fitting onto the inner wall of the two grinding mechanisms 3, the two grinding disc C-shaped connecting plates are activated. Multiple grinding discs on the outer side of 316 are pushed by electric push rods 317 to make two sets of grinding discs 318 fit against the outer wall of the steel pipe. Then, the entire device moves along the trajectory of the steel pipe. At the same time, the second motor 310 on the right side of the second L-shaped connecting block 39 of the two grinding mechanisms 3 is activated. The second motor 310 drives the second transmission rod 311 to rotate. The second transmission rod 311 drives the second transmission disc 313 and the second gear 312 to rotate. The second transmission disc 313 drives the transmission disc 38 to rotate through the second track 314. The transmission disc 38 drives the transmission rod 36 to rotate. The transmission rod 36 drives the gear 37 to rotate. Since both gear 37 and the second gear 312 mesh with the outer wall of the C-shaped gear disc 315, the C-shaped gear disc 315 rotates on the outer wall of the C-shaped slide plate 31.The C-shaped toothed disc 315 drives the C-shaped connecting plate 316 of the grinding disc to rotate. The C-shaped connecting plate 316 drives the electric push-pull rod 317 and the grinding disc 318 to rotate, so that the grinding disc 318, after being attached to the outer wall of the steel pipe, can efficiently grind the fine cracks on the surface of the steel pipe in a rotating manner, effectively removing burrs and uneven parts at the cracks and improving the surface smoothness of the steel pipe. At the same time, the rear grinding mechanism 3 is activated. The polishing disc in the rear grinding mechanism 3 is attached to the outer wall of the steel pipe by being pushed by multiple electric push-pull rods 317 of the grinding disc. Its working mode is consistent with the front grinding disc 318. The rotation of the polishing disc can perform fine polishing on the tiny traces remaining after grinding fine cracks on the steel pipe surface, further eliminating surface roughness and achieving a higher standard of flatness and smoothness for the steel pipe surface. When the two grinding mechanisms work together, the front grinding disc 318 completes crack grinding and initial flattening, while the rear polishing disc performs secondary polishing, forming a complete surface treatment process. This ensures that fine cracks on the surface of the stainless steel seamless pipe are completely eliminated and the overall quality meets industrial production requirements.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A processing device for eliminating fine cracks on the surface of stainless steel seamless pipes, comprising a connecting frame (1), characterized in that: The inner side of the connecting frame (1) is fixedly connected to a positioning mechanism (2), and a grinding mechanism (3) is provided on both the front and rear sides of the positioning mechanism (2). The connecting frame (1) includes two side plates (11). L-shaped blocks (12) are fixedly connected to the top and bottom of the inner front side of the two side plates (11). Guide rods (13) are fixedly connected to the front side of the two side plates (11). Transmission wheels (14) are fixedly connected to the three sides of the inner side of the two sets of L-shaped blocks (12) on the left and right sides. Lifting transmission tracks (15) are fitted on the outer walls of the two sets of transmission wheels (14) on the left and the two sets of transmission wheels (14) on the right. The positioning mechanism (2) includes a T-shaped connecting plate (21), and U-shaped connecting plates (22) are fixedly connected to both sides of the bottom center of the T-shaped connecting plate (21). The bottom of the two U-shaped connecting plates (22) is fixedly connected to a positioning component (23). Both of the grinding mechanisms (3) include C-shaped slide plates (31), and C-shaped connecting plates (32) are fixedly connected to the inner side of both C-shaped slide plates (31). C-shaped toothed discs (315) are rotatably connected to the outer wall of both C-shaped slide plates (31).

2. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 1, characterized in that: A horizontal connecting plate (16) is fixedly connected to the top of the inner rear side of the two side plates (11). A columnar transmission rod (17) is fixedly connected to the inner side of the two transmission wheels (14) on the top rear side. A motor (18) is fixedly connected to the middle of the top of the horizontal connecting plate (16). A transmission shaft (19) is fixedly connected to the output end of the motor (18). A track (110) is fitted on the outer wall of the transmission shaft (19). A second transmission shaft (111) is fitted on the front side of the inner wall of the track (110). The inner wall of the second transmission shaft (111) is fixedly connected to the middle of the outer wall of the columnar transmission rod (17). A support base plate (112) is fixedly connected to the bottom of both side plates (11).

3. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 2, characterized in that: The top front side of each of the two guide pillars (13) is slidably connected to a concave slider (113), the front side of each of the two concave sliders (113) is fixedly connected to a lifting plate (114), the middle rear side of each of the two concave sliders (113) is fixedly connected to a track connecting block (115), the inner wall of each of the two track connecting blocks (115) is fixedly connected to the top of the front outer wall of each of the two lifting transmission tracks (15), and the top of the inner side of each of the two lifting plates (114) is fixedly connected to the rear side of the left and right sides of the T-shaped connecting plate (21).

4. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 1, characterized in that: The positioning component (23) includes a positioning frame (231), and clamping members (232) are fixedly connected to both the front and rear sides of the inner side of the positioning frame (231).

5. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 4, characterized in that: The positioning frame (231) includes two concave plates (2311). The tops of the two concave plates (2311) are fixedly connected to the bottoms of two U-shaped connecting plates (22). An electric push rod connecting rod (2312) is fixedly connected to the middle of the top of each of the two concave plates (2311). An electric push rod (2313) is fixedly connected to the inner side of the two electric push rod connecting rods (2312). Columnar uprights (2313) are fixedly connected to the front and rear sides of the bottom of each of the two concave plates (2311). 5) The front and rear sides and the inner sides of the two concave plates (2311) are fixedly connected with uprights (2314). The bottom of the two sets of uprights (2314) on the left and the bottom of the two sets of uprights (2314) on the right are fixedly connected with C-shaped guide plates (2316). The top center of the two sets of C-shaped guide plates (2316) on the left and right is fixedly connected to the bottom of the two sets of columnar uprights (2315). The bottom of the electric push rod (2313) is fixedly connected with a push-pull plate (2317).

6. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 4, characterized in that: Both clamping members (232) include a top connecting block (2321). The left and right sides of the two top connecting blocks (2321) are fixedly connected to the front and rear sides of the inner side of the two concave plates (2311). The four sides of the bottom of the two top connecting blocks (2321) are fixedly connected to columnar vertical connecting rods (2322). The bottom of the two sets of columnar vertical connecting rods (2322) on the front side and the bottom of the two sets of columnar vertical connecting rods (2322) on the rear side are fixedly connected to L-shaped side connecting blocks (2323). 23) The inner side of each of the two base blocks (2324) is fixedly connected to a base block (2324). The front and rear sides of the bottom of each of the two base blocks (2324) are fixedly connected to hinged side blocks (2329). The top center of each of the two base blocks (2324) is fixedly connected to a guide column (2326). The front and rear sides of the bottom of each of the two top connecting blocks (2321) are fixedly connected to columnar guide rods (2325). The bottom ends of the two sets of columnar guide rods (2325) are fixedly connected to the center of the top of the two sets of L-shaped side connecting blocks (2323).

7. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 6, characterized in that: The top of the outer wall of each of the two guide columns (2326) is slidably connected to a cross lifting block (2328). The inner walls of the front and rear sides of the two cross lifting blocks (2328) are slidably connected to the outer walls of two sets of columnar guide rods (2325). The outer sides of the two top connecting blocks (2321) are fixedly connected to a connecting block (2327). The left and right sides of the two connecting blocks (2327) are fixedly connected to a side guide plate (23215). The inner sides of the two cross lifting blocks (2328) are fixedly connected to the front and rear sides of the push-pull plate (2317).

8. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 7, characterized in that: Both sides of the two cross-shaped lifting blocks (2328) are rotatably connected to arc-shaped rotating plates (23210). The bottom of the two sets of arc-shaped rotating plates (23210) are rotatably connected to concave hinge blocks (23211). Rotating plates (23212) are rotatably connected to the inner sides of the two sets of concave hinge blocks (23211). The outer walls of the two sets of rotating plates (23212) on the front side and the two sets of rotating plates (23212) on the rear side, away from the concave hinge blocks (23211), are rotatably connected to the inner sides of the two sets of hinge side blocks (2329). Arc-shaped clamping plates (23213) are fixedly connected to the outer sides of the two sets of concave hinge blocks (23211). Multiple rotating wheels (23214) are rotatably connected to the inner sides of the two sets of arc-shaped clamping plates (23213).

9. The stainless steel seamless pipe surface fine crack elimination processing equipment according to claim 1, characterized in that: Both sides of the top center of the outer wall of the two C-shaped connecting plates (32) are fixedly connected to inverted L-shaped connecting plates (33). The rear sides of the inner top of the two sets of inverted L-shaped connecting plates (33) are fixedly connected to the left and right sides of the outer side of the two cross lifting blocks (2328). The outer sides of the two sets of inverted L-shaped connecting plates (33) are rotatably connected to the inner sides of the two sets of side guide plates (23215). The top of the outer sides of the two sets of inverted L-shaped connecting plates (33) are fixedly connected to sliding plates (34). The inner sides of the two sets of sliding plates (34) are slidably connected to the two sets of side guide plates (23215). On the top of the outer side of 23215), an L-shaped connecting block (35) is fixedly connected to one side of the outer wall of each of the two C-shaped connecting plates (32). A transmission rod (36) is rotatably connected to the inner wall of each of the two L-shaped connecting blocks (35). A gear (37) is fixedly connected to the outer end of each of the two transmission rods (36). The outer wall of each of the two gears (37) meshes with the outer wall of each of the two C-shaped gear discs (315). A transmission disc (38) is fixedly connected to the inner end of each of the two transmission rods (36). A second L-shaped connecting block (39) is fixedly connected to the right side of the outer wall of each of the two C-shaped connecting plates (32). A second motor (310) is fixedly connected to the right side of each of the two second L-shaped connecting blocks (39). A second transmission rod (311) is fixedly connected to the output end of each of the two second motors (310). A second transmission disc (313) is fixedly connected to the outer wall of each of the two second transmission rods (311). A second track (314) is fitted onto the outer wall of each of the two second transmission discs (313). The inner wall of each of the two second tracks (314) away from the second transmission disc (313) is fitted onto the outer wall of each of the two transmission discs (38). The outer ends of the two second transmission rods (311) are fixedly connected to... A second gear (312) is connected to the outer wall of each of the two second gears (312), and the outer wall of each of the two C-shaped gear discs (315) is meshed with the side of the outer wall of each of the two C-shaped gear discs (315) away from the gear (37). A grinding disc C-shaped connecting plate (316) is fixedly connected to the outer side of each of the two grinding disc C-shaped connecting plates (316), and a grinding disc electric push-pull rod (317) is fixedly connected to the outer side of each of the two grinding disc C-shaped connecting plates (316) in a circular array. A grinding disc (318) is fixedly connected to the inner side of each of the multiple grinding disc electric push-pull rods (317) on the front side, and a polishing disc is fixed to the inner side of each of the multiple grinding disc electric push-pull rods (317) on the rear side.

10. A process for eliminating fine cracks on the surface of seamless stainless steel pipes, implemented using the processing equipment described in claim 1, specifically includes: Step 1: When it is necessary to eliminate the surface fine cracks of the steel pipe, start the motor (18), and drive the track (110) through the transmission shaft (19) to drive the second transmission shaft (111) to rotate, which in turn drives the columnar transmission rod (17) to rotate. Step 2: The columnar transmission rod (17) rotates to drive the left and right sets of transmission wheels (14) to rotate synchronously. The rotation of the transmission wheels (14) drives the lifting transmission track (15) to rotate, causing the track connecting block (115) to move up and down. Step 3: The track connecting block (115) moves up and down, causing the concave slider (113) to slide on the guide rod (13). The sliding of the concave slider (113) causes the lifting plate (114) to move up and down, thereby driving the positioning mechanism (2) to move, so that the grinding mechanism (3) moves to the appropriate detection position. Step 4: Insert the steel pipe into the inside of the two sets of arc-shaped clamping plates (23213) and the two grinding mechanisms (3); Step 5: Activate the electric push rod (2313), push the push-pull plate (2317) downward, and drive the two cross lifting blocks (2328) to slide downward along the columnar vertical guide rod (2325); Step 6: The cross lifting block (2328) slides down, causing the arc-shaped rotating plate (23210) to rotate downwards, pushing the concave hinge block (23211) to move inwards. The two sets of arc-shaped clamping plates (23213) gradually approach and adhere to the surface of the steel pipe, while driving the two grinding mechanisms (3) to move downwards, so that their inner walls fit onto the outer wall of the steel pipe. Step 7: Start multiple electric push-pull rods (317) to push two sets of grinding discs (318) to fit against the outer wall of the steel pipe. The whole device moves along the trajectory of the steel pipe. Start the second motor (310) to make the grinding discs (318) rotate to grind the fine cracks on the surface of the steel pipe. Step 8: The rear grinding mechanism (3) is started. The polishing disc is pushed by the electric push rod (317) of the grinding disc to fit against the outer wall of the steel pipe and to perform fine polishing on the small traces left after grinding.

Images