Steel pipe inner and outer cooperative grinding machine

Abstract

The application belongs to the technical field of intelligent manufacturing polishing machines, and discloses a steel pipe inner and outer cooperative polishing machine, which comprises a grinding machine tool, a steel pipe body is arranged on the grinding machine tool, a machine plate frame is arranged on the side away from the steel pipe body, a motor is fixedly connected to the top end plate body of the machine plate frame, an output shaft of the motor is fixedly connected with a telescopic cylinder, and a polishing wheel three is fixedly connected to the movable end of the telescopic cylinder. Through linkage cooperation of the unlocking structure and the locking structure, the adaptive upgrading of the polishing equipment limiting support structure is realized. When the telescopic cylinder extends for a short distance, two-point limiting is adopted to realize stable polishing. When the telescopic cylinder extends for a long distance to adapt to long steel pipe machining, through the clamping linkage of the annular groove and the arc angle rod plate, the T-shaped slide plate, the arc angle cross plate, the hook and other components are linked and unlocked, the original two-point limiting support is adaptively upgraded to four-point limiting support, and the multi-stage limiting structure can constrain the deflection and shaking of the telescopic cantilever end throughout the whole process.

Description

Technical Field

[0001] This invention belongs to the field of intelligent manufacturing grinding machine technology, specifically a steel pipe internal and external co-grinding machine. Background Technology

[0002] In the intelligent manufacturing equipment industry, steel pipe internal and external grinding machines are specialized pipe surface treatment equipment, divided into three main categories: external wall grinding machines, internal wall grinding machines, and internal and external integrated synchronous grinding machines. They are specifically designed to remove oxide scale, rust, weld beads, burrs, and scratches from the inside and outside of steel pipes. They are suitable for carbon steel, stainless steel, alloy pipes, hydraulic clean pipes, chemical fluid pipelines, oil and gas transmission pipes, and other applications. Their core structure includes a feeding mechanism: a rubber roller support frame and a continuously variable speed conveyor roller, which drives the steel pipe to move forward axially at a uniform speed; a grinding unit: multiple sets of sanding belt wheels, wire brush wheels, flap wheels, and cloth polishing wheels are arranged and pneumatically clamped; and a rotational auxiliary: the support roller drives the steel pipe to rotate 360 ​​degrees, ensuring uniform grinding of the entire circumference of the outer wall.

[0003] Existing internal wall grinding equipment mostly adopts a telescopic cantilever grinding structure. When the telescopic cylinder extends a short distance to adapt to the grinding of short steel pipes, the fixed support spacing can basically meet the stable grinding requirements. However, when processing long steel pipes and the telescopic cylinder extends a long distance, the lever arm of the grinding cantilever continuously increases with the extension length, while the equipment support points cannot be increased or decreased synchronously, and the support range cannot be dynamically adapted. It only relies on a fixed number of support points for limiting constraints, resulting in severely insufficient support stiffness. Under this condition, the grinding cantilever is easily affected by the multiple superposition effects of the rod's own weight deflection, the lateral impact force of grinding, and the mechanical vibration of the equipment operation, resulting in large-scale swaying, radial offset, and high-frequency vibration. Moreover, the longer the grinding head extends, the greater the swaying and offset of the cantilever and the more severe the vibration amplitude. Long-term high-frequency swaying and vibration will aggravate the wear of the telescopic cylinder cylinder seals and the deformation of the grinding spindle, significantly reducing the service life of the equipment and increasing equipment maintenance costs and production downtime. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a steel pipe internal and external co-grinding machine.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel pipe internal and external co-grinding machine, including a grinding machine tool, a steel pipe body on the grinding machine tool, a machine plate frame on the side away from the steel pipe body, a motor fixedly connected to the top plate of the machine plate frame, a telescopic cylinder fixedly connected to the output shaft of the motor, a grinding wheel three fixedly connected to the movable end of the telescopic cylinder, and a grinding wheel two and a grinding wheel one slidably connected to the movable end of the telescopic cylinder, and a snap-fit ​​structure for easy disassembly and replacement of the grinding head size is provided between the grinding wheel one, grinding wheel two, and grinding wheel three; The grinding machine tool is equipped with two sets of first and second sideboard frames. Each set of first and second sideboard frames is connected to two positioning rollers that rotate together. The second sideboard frame closest to the grinding wheel is fixedly connected to a magnetic plate. The two positioning rollers are slidably connected to the movable end of the telescopic cylinder. Each set of first and second sideboard frames is equipped with an unlocking structure that facilitates effective support as the grinding length is extended. The bottom end of each set of second sideboard frames is equipped with a locking structure for locking position support.

[0006] Preferably, the snap-fit ​​structure includes a rectangular groove block fixedly connected to one end of the grinding wheel 2 and grinding wheel 3. Two L-shaped rods are slidably connected to the inner walls of both rectangular groove blocks. An L-shaped clamping plate is fixedly connected to one end of each L-shaped rod near the center of the corresponding rectangular groove block. Two springs are jointly and fixedly connected between the plates of every two adjacent L-shaped clamping plates. T-shaped groove blocks are fixedly connected to the ends of the grinding wheel 1 and grinding wheel 2 away from the telescopic cylinder. The groove walls of the two T-shaped groove blocks are intermittently and tightly snapped into two sets of symmetrical L-shaped clamping plates. The movable end of the telescopic cylinder is slidably connected to each rectangular groove block and each T-shaped groove block.

[0007] Preferably, two sets of symmetrical conical elastic elements are attached to the outer wall of the movable end of the telescopic cylinder. Each pair of conical elastic elements has an arc-shaped sliding groove on its two ends of the inclined plate. A ball rod is attached to and slidably connected in the groove wall of each pair of arc-shaped sliding grooves. A spring is fixedly connected between each pair of ball rods.

[0008] Preferably, a telescopic rod is fixedly connected to the top outer wall of each of the conical elastic elements, and the ends of the two sets of symmetrical telescopic rods away from the telescopic cylinder are respectively fixedly connected to the plates of the first and second guardrail frames. A vertical rod is slidably connected to each set of ball rods, and the rods of the two sets of vertical rods are respectively fixedly connected to the first and second guardrail frames.

[0009] Preferably, the unlocking structure includes two annular grooves formed on the movable end of the telescopic cylinder, each annular groove being intermittently fitted with an arc-angle rod plate, each arc-angle rod plate being composed of an arc-angle plate and two sliding rods fixed thereto.

[0010] Preferably, a T-shaped sliding plate is fixedly connected to the top of the two sliding rods, and two springs are fixedly connected between the T-shaped sliding plate and the arc-angle plate of the arc-angle rod plate. A T-shaped groove plate is slidably engaged on the body of the T-shaped sliding plate, and the body of the T-shaped groove plate is fixedly connected to a corresponding set of the second railing frame.

[0011] Preferably, arc-shaped horizontal plates are fixedly connected to the outer walls of both ends of the T-shaped slide plate. Hooks are slidably connected to the ends of the two arc-shaped horizontal plates away from the arc-shaped rod plate. Each hook consists of a rectangular plate and a hook plate. The hook plate is rotatably connected to one end of the rectangular plate through a torsion spring shaft. An arc-shaped baffle is fixedly connected to the rectangular plate of the hook. A U-shaped frame is rotatably connected to each hook. The two U-shaped frames are fixedly connected to two plates in the first railing frame, and two circular discs are fixedly connected to each of the two U-shaped frames.

[0012] Preferably, the upper and lower outer walls of the hook are respectively connected to the two annular discs by a torsion spring, and the hook is intermittently and tightly engaged with a slot plate. The end of the slot plate away from the hook is fixedly connected to the second railing frame.

[0013] Preferably, the locking structure includes a slide fixedly connected to the bottom end of the second rail frame, and the bottom plate of the grinding machine tool is provided with a T-shaped slide groove that slides and engages with the slide. Multiple plate seats are fixedly connected to the inner wall of the T-shaped slide groove.

[0014] Preferably, an inclined abutment plate and an inclined plate are fixedly connected to the top two sides of the plate body of the plate base, respectively. A shaft is fixedly connected to the plate body of the inclined plate near the top. A rotating plate is fixedly connected to the shaft. The plate body of the rotating plate and the slide can be intermittently fitted. Two torsion springs are fixedly connected to the outer walls of the plate bodies at both ends of the rotating plate and the inclined plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, by setting up grinding wheels 1, 2, and 3 with diameters adapted to different pipe diameters, and using a dedicated snap-fit ​​structure, relies on the elastic snap-fit ​​cooperation of rectangular groove blocks, L-shaped rods, spring 1, and T-shaped groove blocks to achieve rapid disassembly and assembly of multiple sets of grinding wheels. Workers can quickly disassemble idle grinding wheels and retain grinding wheels of the appropriate specifications according to the pipe diameter specifications to be processed, such as when processing carbon steel, stainless steel, alloy fluid pipelines, high-pressure oil and gas transmission pipes, and hydraulic clean pipes of different diameters on intelligent manufacturing production lines. This eliminates the need for complete disassembly of the grinding mechanism or replacement of equipment parts, making disassembly and assembly simple and requiring no professional tools, significantly reducing equipment debugging difficulty and labor costs. This invention provides a buffer structure consisting of a symmetrical conical elastic element, an arc-shaped groove, a ball joint, and a second spring at the movable end of the telescopic cylinder, combined with a basic limiting structure for the positioning roller. During the extension and grinding process of the telescopic cylinder, the adaptive displacement of the conical elastic element and the elastic deformation of the second spring can effectively absorb and offset the running vibration and swaying offset of the telescopic cantilever end, buffer the lateral impact force during the grinding process and the deformation caused by the deflection of the rod's own weight, and solve the problem of severe vibration and large swaying amplitude after long-distance extension of traditional cantilever structures. This invention achieves an adaptive upgrade of the limiting support structure of the grinding equipment through the linkage of the unlocking and locking structures. When the telescopic cylinder extends a short distance, two-point limiting is used to achieve stable grinding. When the telescopic cylinder extends a long distance to adapt to the processing of long steel pipes, the locking linkage between the annular groove and the arc-angle rod plate drives the T-shaped slide plate, arc-angle horizontal plate, hook and other components to unlock in linkage. With the limiting cooperation of the slide block, T-shaped slide groove, rotating plate and inclined plate, the original two-point limiting support is adaptively upgraded to four-point limiting support. The multi-level limiting structure can restrain the offset and sway of the telescopic cantilever end throughout the process, greatly improving the operating stability of the equipment under long working conditions. It is perfectly adapted to the high-precision grinding operation of the inner wall of long steel pipes, and solves the technical pain points of existing intelligent manufacturing grinding equipment for pipes, such as cantilever shaking, cumbersome specification change, and difficulty in balancing the processing stability of long and short pipes. It has good industrial support and automation production line integration adaptability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the complete structure of the annular groove of the present invention; Figure 3 This is a partial cross-sectional view of the T-shaped groove block of the present invention; Figure 4 This is a schematic diagram of a partial planar structure of the present invention; Figure 5 This is a schematic diagram of the complete structure of the arc-angle slide groove of the present invention; Figure 6 This is a schematic diagram of the complete structure of the slide block of the present invention; Figure 7 This is a schematic diagram of the complete structure of the positioning roller of the present invention; Figure 8 For the present invention Figure 7 A magnified view of the structure at point A in the middle; Figure 9 This is a schematic diagram of a partial cross-sectional structure of the grinding machine tool of the present invention; Figure 10 This is a schematic diagram of the planar structure of the slide block of the present invention; Figure 11 This is a schematic diagram of the rotating and tilting structure of the rotating plate of the present invention.

[0017] Figure 12 This is a schematic diagram of the arc baffle and hook structure of the present invention.

[0018] In the diagram: 1. Grinding machine; 101. Steel pipe body; 2. Machine plate frame; 201. Motor; 202. Telescopic cylinder; 203. Grinding wheel one; 204. Grinding wheel two; 205. Grinding wheel three; 206. Rectangular groove block; 207. L-shaped rod plate; 208. L-shaped clamping plate; 209. Spring one; 210. T-shaped groove block; 211. First railing frame; 212. Second railing frame; 213. Positioning roller; 214. Conical elastic element; 215. Arc-angle slide groove; 216. Ball stick; 217. Vertical rod; 218. Spring two; 219. Annular groove; 220. Arc-angled rod plate; 221. T-shaped sliding plate; 222. Spring three; 223. T-shaped groove plate; 224. Arc-angled horizontal plate; 225. Hook; 2251. Arc-shaped baffle; 226. U-shaped frame; 227. Circular disc; 228. Torsion spring one; 229. Slot plate; 230. Slide seat; 231. T-shaped slide groove; 232. Plate seat; 233. Inclined abutment plate; 234. Inclined plate; 235. Shaft; 236. Rotating plate; 237. Torsion spring two. 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 Figures 1 to 12 As shown, the present invention provides a steel pipe internal and external co-grinding machine, including a grinding machine tool 1, a steel pipe body 101 on the grinding machine tool 1, a machine plate frame 2 on the side away from the steel pipe body 101, a motor 201 fixedly connected to the top plate of the machine plate frame 2, a telescopic cylinder 202 fixedly connected to the output shaft of the motor 201, an outer ring grinding parallel machine slidably installed on the grinding machine tool 1, a grinding wheel 205 detachably fixedly connected to the movable end of the telescopic cylinder 202 by bolts, and a grinding wheel 204 and a grinding wheel 203 slidably connected to the movable end rod of the telescopic cylinder 202, the diameters of the grinding wheel 203, the grinding wheel 204, and the grinding wheel 205 are respectively adapted to pipes of different diameters, and a snap-fit ​​structure is provided between the grinding wheel 203, the grinding wheel 204, and the grinding wheel 205 to facilitate disassembly and replacement of the grinding head size, for the purpose of quick disassembly and assembly of the three; The snap-fit ​​structure includes a rectangular groove block 206 fixedly connected to one end of the grinding wheel 204 and the grinding wheel 3 205. Each rectangular groove block 206 has two L-shaped rod plates 207 slidably connected to its inner wall. Each L-shaped rod plate 207 has an L-shaped locking plate 208 fixedly connected to one end of its rod at the center of the rectangular groove block 206. Two springs 209 are fixedly connected between the plates of every two adjacent L-shaped locking plates 208. T-shaped groove blocks 210 are fixedly connected to the end of the grinding wheel 1 203 and the grinding wheel 2 204 away from the telescopic cylinder 202. The groove walls of the two T-shaped groove blocks 210 have slots for intermittently and tightly snapping with the L-shaped locking plates 208.

[0021] The grinding machine tool 1 is provided with two sets of first rail frame 211 and second rail frame 212. Each set of first rail frame 211 and second rail frame 212 is composed of two mutually symmetrical plates. The second rail frame 212 closest to the grinding wheel 203 is fixedly connected to a magnetic plate. The grinding wheel is composed of a cold-rolled iron plate at the center and a grinding wheel fixedly connected to the outside of the cold-rolled iron plate. The cold-rolled iron plate can be magnetically attracted to the magnetic plate. Two positioning rollers 213 are rotatably connected between the plates of each set of first rail frame 211 and second rail frame 212. The two positioning rollers 213 are in contact with the movable end of the telescopic cylinder 202 and are used to fix and limit the movable end of the infinitely extended telescopic cylinder 202. The above solution is adopted: such as Figure 1 As shown, the operation of the grinding machine tool 1 causes the steel pipe body 101 to rotate at a fixed point, and the motor 201 on the machine plate frame 2 is started simultaneously to drive the telescopic cylinder 202 to rotate. The telescopic cylinder 202 in the rotating state will also start in real time to extend its own movable end, thereby driving the first grinding wheel 203, the second grinding wheel 204, and the third grinding wheel 205 to rotate simultaneously in the passive translation process.

[0022] Different diameter steel pipe bodies 101 can be matched with grinding wheels of different sizes and specifications, such as grinding wheel 1 203, grinding wheel 204, and grinding wheel 3 205, to grind and polish their inner walls. At the same time, the outer ring grinding parallel machine on the grinding machine tool 1 will also perform real-time translational grinding on the outer ring surface of the steel pipe body 101. The synchronous translation of the two in opposite directions achieves coordinated grinding of the inner and outer walls of the steel pipe body 101.

[0023] like Figure 2 and Figure 3As shown, before the motor 201 and telescopic cylinder 202 are operated, it is necessary to remove the grinding wheel that does not conform to the specifications of the steel pipe body 101 being ground. For example, when using the smallest diameter grinding wheel 205, it is necessary to manually apply pressure to the L-shaped rod plates 207 installed on both sides of the rectangular groove block 206. This causes the two L-shaped rod plates 207 to simultaneously squeeze the two springs 209 that are fixed together, causing the two springs 209 to deform simultaneously. The presence of the two springs 209 is beneficial because when the manual pressure on the two L-shaped rod plates 207 is no longer applied, the springs 209 will automatically drive the L-shaped rod plates 207 to elastically reset according to their own elastic force.

[0024] The two L-shaped clamping plates 208, which were previously passively moving within the groove wall of the rectangular groove block 206, will gradually release their engagement with the T-shaped groove block 210 fixed on the second grinding wheel 204 during the process of moving closer to each other. This allows the second grinding wheel 204 to be directly pushed, causing the second grinding wheel 204, the first grinding wheel 203, and all the structures fixed on the two wheels to move synchronously along the direction of the movable end rod on the movable end of the telescopic cylinder 202, until the T-shaped groove block 210 fixed on the first grinding wheel 203 and the two magnetic plates fixed on a set of second railing frames 212 magnetically attract each other (installation). The set of second railings 212 with magnetic plates is a set of plates close to the first grinding wheel 203 (not a set of second railings 212 close to the machine plate frame 2), thereby limiting the separation of the first grinding wheel 203 and the second grinding wheel 204. However, if the first grinding wheel 203 is used, the second grinding wheel 204 and the third grinding wheel 205 do not need to be separated by force, because the diameter of the second grinding wheel 204 and the third grinding wheel 205 cannot reach the steel pipe body 101 specification that the first grinding wheel 203 conforms to. When using the second grinding wheel 204, it is only necessary to disengage the first grinding wheel 203 from the snap-fit.

[0025] Two sets of symmetrical conical elastic elements 214 are attached to the outer wall of the movable end of the telescopic cylinder 202. Each pair of conical elastic elements 214 has an arc-shaped sliding groove 215 on the inclined plate at both ends. A ball rod 216 is attached to the groove wall of each pair of arc-shaped sliding grooves 215. A spring 218 is fixedly connected between each pair of ball rods 216. A telescopic rod is fixedly connected to the outer wall of the top of each conical elastic element 214. The ends of the two sets of symmetrical telescopic rods away from the telescopic cylinder 202 are fixedly connected to the plates of the first guardrail frame 211 and the second guardrail frame 212, respectively, to limit the horizontal movement of each conical elastic element 214. The outer surface of the conical elastic element 214 is made of smooth rubber. A vertical rod 217 is attached to each set of ball rods 216. The rods of the two sets of vertical rods 217 are fixedly connected to the first guardrail frame 211 and the second guardrail frame 212, respectively.

[0026] The above solution is adopted: such as Figure 4and Figure 5 As shown, during the continuous extension of the movable end of the telescopic cylinder 202, it is constantly limited by the positioning rollers 213 that slide against the outer walls at both ends. However, as the rod shape of the movable end of the telescopic cylinder 202 continues to lengthen, it will inevitably sway. Therefore, the conical elastic members 214 that are in contact with the other two ends of the movable end of the telescopic cylinder 202 will move under force. The force translation of the conical elastic member 214 will achieve the translation effect through the telescopic rod fixed above. The conical elastic member 214 under the restricted translation state will squeeze the corresponding ball rods 216 in the two arc-angle slide grooves 215, so that the two ball rods 216 will translate in opposite directions in the two corresponding arc-angle slide grooves 215 under the force of the conical elastic member 214. The mutual separation of the two ball rods 216 will simultaneously stretch the spring 218 fixed in the middle, causing it to deform, thereby buffering the force of the conical elastic member 214 and the swaying telescopic cylinder 202.

[0027] When dealing with a long steel pipe body 101, the grinding operation will inevitably cause the movable end of the telescopic cylinder 202 to extend across the entire steel pipe body 101. As a result, the longer the movable end extends, the greater the swaying amplitude and vibration will be. Especially when facing the working condition of grinding the front end of the inner wall of the steel pipe with a grinding load, the swaying will be further amplified. This means that the cantilever support arm will continue to increase. Due to the superposition of the deflection of the rod body and the lateral impact of grinding, the movable end will generate continuous swaying during the extension process. Moreover, the greater the extension length, the swaying offset and vibration amplitude will intensify simultaneously, which can easily cause defects such as uneven grinding, rapid wear of cylinder seals, and deformation of the spindle. The design of the conical elastic element 214 can effectively reduce the swaying generated by the movable end.

[0028] Each set of first railing frame 211 and second railing frame 212 is provided with an unlocking structure that facilitates effective support as the grinding length is extended; The unlocking structure includes two annular grooves 219 on the movable end of the telescopic cylinder 202. Each annular groove 219 can intermittently engage with an arc-angle rod plate 220. Each arc-angle rod plate 220 is composed of an arc-angle plate and two slide rods fixed thereto. The top ends of the two slide rods are jointly and fixedly connected to a T-shaped sliding plate 221. Two springs 222 are jointly and fixedly connected between the T-shaped sliding plate 221 and the arc-angle plate of the arc-angle rod plate 220. The two springs 222 are sleeved on the outer surfaces of two adjacent slide rods. A T-shaped groove plate 223 is slidably engaged on the plate body of the T-shaped sliding plate 221. The plate body of the T-shaped groove plate 223 is fixedly connected to a set of adjacent second guardrail frames 212. Both ends of the T-shaped sliding plate 221 are fixedly connected to curved horizontal plates 224. At the ends of the two curved horizontal plates 224 away from the curved rod plate 220, hooks 225 are slidably connected. Each hook 225 consists of a rectangular plate and a hook plate. A U-shaped frame 226 is rotatably connected to the rectangular plates of both hooks 225. The hook plate is rotatably connected to one end of the rectangular plate via a torsion spring shaft. An arc-shaped baffle 2251 is fixedly connected to the rectangular plate of the hook 225 to limit the movement of the hook plate. It can rotate in one direction. Both U-shaped frames 226 are fixedly connected to two plates in the first railing frame 211, and two circular discs 227 are fixedly connected to each of the two U-shaped frames 226. The upper and lower outer walls of the hook 225 are respectively fixedly connected to the two circular discs 227 with torsion springs 228. The hook 225 is intermittently and tightly engaged with a slot plate 229. The end of the slot plate 229 away from the hook 225 is fixedly connected to the adjacent second railing frame 212.

[0029] The above solution is adopted: such as Figures 6 to 8As shown, when the movable end of the telescopic cylinder 202 extends excessively, the annular groove 219 on its movable end will automatically engage with the arc-shaped rod plate 220, which is continuously slidably connected to the surface of the movable end of the telescopic cylinder 202, during the translational extension process. Consequently, under the drive of the telescopic cylinder 202, the arc-shaped rod plate 220 and the T-shaped sliding plate 221 fixed on its top will both be moved. Because two springs 222 are jointly fixed between the T-shaped sliding plate 221 and the arc-shaped rod plate 220, when the annular groove 219 passes through, the two springs 222 will naturally cause the arc-shaped rod plate 220 to elastically engage into the annular groove 219, thus being moved by the movable end of the telescopic cylinder 202. The movement of the T-shaped sliding plate 221 will be guided by the T-shaped groove plate 223, ensuring its continuous movement. In the translational state (the T-shaped slide plate 221 is specifically a magnetic plate and a metal T-shaped groove plate 223 adsorbed; in the original state, the translation of the movable end is insufficient to drive the arc-angle rod plate 220 and the T-shaped slide plate 221 to translate, requiring the superposition of the clamping force of the arc-angle rod plate 220 and the annular groove 219), the T-shaped slide plate 221 that is translated will synchronously drive the arc-angle horizontal plates 224 fixed at both ends to translate. During the sliding process of the T-shaped slide plate 221 in the groove plate 229, it will cause the arc-angle horizontal plates 224 at both ends to gradually release the resistance to the corresponding hooks 225. The hooks 225 that are not under resistance will be automatically driven by the torsion springs 228 fixed at the upper and lower ends and the two annular discs 227 respectively, and rotate around the U-shaped frame 226 as the axis point, resulting in angular tilting and disengagement and corresponding clamping with the groove plate 229. The tilt angle created by the passive tilting of the hook 225 away from the slot plate 229 will not hinder the subsequent pressing of the curved horizontal plate 224 and the engagement of the slot plate 229. Subsequently, as the T-shaped slide plate 221 continues to passively translate and contacts the groove wall of the T-shaped slot plate 223, it indicates that the T-shaped slide plate 221 has translated from the right end groove wall to the left end groove wall of the T-shaped slot plate 223 (with...). Figure 5 Taking the orientation as an example, at this time, the T-shaped groove plate 223 and the second railing frame 212 can be moved synchronously by the movable end of the telescopic cylinder 202.

[0030] Each set of second railings 212 has a locking structure at the bottom for support. The locking structure includes a slide 230 fixedly connected to the bottom end of the second frame 212. The bottom plate of the grinding machine tool 1 has a T-shaped groove 231 that slides and engages with the slide 230. Multiple plate seats 232 are fixedly connected to the inner wall of the T-shaped groove 231. An inclined plate 233 and an inclined plate 234 are fixedly connected to the top two plates of the plate seat 232, respectively. A shaft 235 is fixedly connected to the plate near the top of the inclined plate 234. A rotating plate 236 is fixedly connected to the shaft 235. The plate of the rotating plate 236 and the slide 230 can be intermittently engaged. Torsion springs 237 are fixedly connected to the outer walls of the plates at both ends of the rotating plate 236 and the inclined plate 234.

[0031] Using the above scheme: After the T-shaped slide plate 221 moves from the right end wall of the T-shaped groove plate 223 to the left end wall, the T-shaped groove plate 223 and a set of second guardrail frames 212, together with the slide block 230, are simultaneously passively limited and translated within the T-shaped groove 231, such as... Figures 9 to 11 As shown, the passively translated slide 230 will contact the two rotating plates 236 after moving to a specific position. Since the rotating plates 236 are rotatably connected to the inclined plate 234 via the shaft 235, during the translation of the slide 230, the rotating plates 236 will passively tilt and rotate within the inclined plate 234 around the shaft 235. This tilting and rotation of the rotating plates 236 will simultaneously twist the two torsion springs 237 fixedly mounted to the inclined plate 234, until the slide 230 abuts against the inclined abutment plate 233 fixed to one side of the top of the plate base 232. This separation and contact pressure between the rotating plate 236 and the two torsion springs 237 immediately cause the rotating plate 236 to elastically reset. At this time, the reset rotating plate 236 plays the role of preventing the slide block 230 from moving in the opposite direction to reset. Because the weight of the slide block 230 itself cannot compress the rotating plate 236 to rotate and cause the torsion springs 237 to contract, it is only under the action of the subsequent arc-angle rod plate 220 elastically engaging with the annular groove 219 to drive the sliding force of the second railing frame 212 that the slide block 230 can reset and compress the rotating plate 236 to rotate, thereby causing the second railing frame 212 to reset.

[0032] With the addition of an extra layer of inclined abutment plate 233 for limiting and pressing, the telescopic cylinder 202 will cause the annular groove 219 to disengage from the arc-shaped rod plate 220 under continuous translation. The clamping force between the arc-shaped rod plate 220 and the annular groove 219 cannot resist the limiting force of the inclined abutment plate 233. Consequently, without affecting the extension of the telescopic cylinder 202, the original two-point limiting support is extended to a four-point limiting support to adapt to the longer steel pipe body 101, so as to avoid excessive shaking displacement and vibration amplitude when it performs internal grinding of cylindrical surface, which would affect the grinding effect.

[0033] Furthermore, after the inclined plate 233 and the rotating plate 236 lock the second railing frame 212, they have a stable rigid support point, which constrains the radial offset and drooping deflection of the far end of the telescopic cantilever. A multi-directional fixed support frame is constructed for the grinding of the inner wall of long steel pipes, which continuously offsets the cantilever shaking caused by the lateral impact of grinding, the vibration of equipment operation, and the weight of the rods. Structurally, it suppresses the large shaking of the grinding head and ensures the coaxial accuracy of the inner circle grinding of long pipes.

[0034] During reset, the retraction of the movable end of the telescopic cylinder 202 will cause the arc-shaped rod plate 220 to re-engage into the annular groove 219, thereby driving the second guardrail frame 212 to reset. Figure 12As shown, when the arc-shaped horizontal plate 224 and the slot plate 229 are passively reset, because the arc-shaped horizontal plate 224 and the slot plate 229 are not on the same horizontal line, the arc-shaped horizontal plate 224 will first come into contact with the inclined arc baffle 2251 and the hook 225, causing the hook 225 to twist the two torsion springs 228 again on the U-shaped frame 226. Then, the slot plate 229 will partially fit with the newly reset hook 225, and the slot plate 229 will fit onto the hook plate at one end of the hook 225, causing the hook plate to rotate on the rectangular plate through the torsion spring shaft. Thus, as the slot plate 229 continues to translate until the slot is close to the hook plate, the torsion spring... The shaft drives the hook plate to elastically reset and re-engage with the slot plate 229. The presence of the arc baffle 2251 will cause the hook plate of the hook 225 to only be resisted and tilted in one direction by the reset and pressure of the slot plate 229. Therefore, when the movable end of the telescopic cylinder 202 extends to grind the inner wall of the shorter steel pipe, if the annular groove 219 does not reach the position of the arc angle rod plate 220, the slot plate 229 and the second railing frame 212 will not move on their own because the slot plate 229 is engaged with the hook plate of the hook 225. They will remain close to the first railing frame 211 and play a storage role. The entire process does not require manual disassembly or manual reset of the support fixture.

[0035] It is worth noting that: when facing steel pipe bodies 101 of different diameters, the relevant structures on the grinding machine 1 that fit and connect with the pipe body, as well as the outer ring grinding parallel machine, are simultaneously controlled by the CNC program and adjusted to the position corresponding to the pipe body itself. This is the effect of existing technology and will not be elaborated on here.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel pipe internal and external co-grinding machine, comprising a grinding machine tool (1), characterized in that: The grinding machine (1) is provided with a steel pipe body (101), and a machine plate frame (2) is provided on the side away from the steel pipe body (101). A motor (201) is fixedly connected to the top plate of the machine plate frame (2). A telescopic cylinder (202) is fixedly connected to the output shaft of the motor (201). A grinding wheel three (205) is fixedly connected to the movable end of the telescopic cylinder (202). A grinding wheel two (204) and a grinding wheel one (203) are also slidably connected to the movable end of the telescopic cylinder (202). A snap-fit ​​structure is provided between the grinding wheel one (203), the grinding wheel two (204), and the grinding wheel three (205) to facilitate disassembly and replacement of the grinding head size. The grinding machine (1) is provided with two sets of first guardrail frames (211) and second guardrail frames (212). Each set of first guardrail frames (211) and second guardrail frames (212) is connected to two positioning rollers (213) in a rotating manner. A magnetic plate is fixedly connected to the second guardrail frame (212) closest to the first grinding wheel (203). The two positioning rollers (213) are in close contact with the movable end of the telescopic cylinder (202). Each set of first guardrail frames (211) and second guardrail frames (212) is provided with an unlocking structure that facilitates effective support as the grinding length unfolds. The bottom end of each set of second guardrail frames (212) is provided with a locking structure for locking position support.

2. The steel pipe internal and external co-grinding machine according to claim 1, characterized in that: The snap-fit ​​structure includes a rectangular grooved block (206) fixedly connected to one end of the grinding wheel (204) and the grinding wheel (205). Two L-shaped rods (207) are slidably connected to the inner walls of each of the two rectangular grooved blocks (206). An L-shaped locking plate (208) is fixedly connected to one end of the rod of each L-shaped rod (207) near the center of the corresponding rectangular grooved block (206). The plates of every two adjacent L-shaped locking plates (208) are connected together... Two springs (209) are fixedly connected to each other. T-shaped groove blocks (210) are fixedly connected to the wheel bodies of the first grinding wheel (203) and the second grinding wheel (204) away from the telescopic cylinder (202). The groove walls of the two T-shaped groove blocks (210) are intermittently and tightly engaged with two sets of symmetrical L-shaped clamping plates (208). The movable end of the telescopic cylinder (202) is slidably connected to each rectangular groove block (206) and T-shaped groove block (210).

3. The steel pipe internal and external co-grinding machine according to claim 1, characterized in that: Two sets of symmetrical conical elastic elements (214) are attached to the outer wall of the movable end of the telescopic cylinder (202). Each pair of conical elastic elements (214) has an arc-shaped sliding groove (215) on the inclined plate at both ends. Each pair of arc-shaped sliding grooves (215) has a ball rod (216) attached to the groove wall. Each pair of ball rods (216) is connected to a spring (218) in a fixed manner.

4. The steel pipe internal and external co-grinding machine according to claim 3, characterized in that: Each of the conical elastic elements (214) has a telescopic rod fixedly connected to its top outer wall. The ends of the two sets of symmetrical telescopic rods away from the telescopic cylinder (202) are respectively fixedly connected to the plates of the first guardrail frame (211) and the second guardrail frame (212). Each set of ball rods (216) has a vertical rod (217) slidably connected to it, and the rods of the two sets of vertical rods (217) are respectively fixedly connected to the first guardrail frame (211) and the second guardrail frame (212).

5. The steel pipe internal and external co-grinding machine according to claim 1, characterized in that: The unlocking structure includes two annular grooves (219) on the movable end of the telescopic cylinder (202). Each annular groove (219) can intermittently engage with an arc-angle rod plate (220). Each arc-angle rod plate (220) is composed of an arc-angle plate and two sliding rods fixed thereto.

6. The steel pipe internal and external co-grinding machine according to claim 5, characterized in that: The top ends of the two slide rods are fixedly connected to a T-shaped slide plate (221). Two springs (222) are fixedly connected between the T-shaped slide plate (221) and the arc corner plate of the arc corner rod plate (220). A T-shaped groove plate (223) is slidably engaged on the body of the T-shaped slide plate (221). The body of the T-shaped groove plate (223) is fixedly connected to a corresponding set of the second railing frame (212).

7. The steel pipe internal and external co-grinding machine according to claim 6, characterized in that: Both ends of the T-shaped slide plate (221) are fixedly connected to the outer walls of the two ends of the slide plate (224). The two ends of the slide plate (224) away from the arc-angle rod plate (220) are slidably connected to the hooks (225). The hooks (225) are composed of a rectangular plate and a hook plate. The hook plate is rotatably connected to one end of the rectangular plate through a torsion spring shaft. The rectangular plate of the hooks (225) is fixedly connected to the arc baffle (2251). Each hook (225) is rotatably connected to a U-shaped frame (226). The two U-shaped frames (226) are fixedly connected to two plates in the first railing frame (211) respectively. The two U-shaped frames (226) are also fixedly connected to two circular discs (227).

8. The steel pipe internal and external co-grinding machine according to claim 7, characterized in that: The upper and lower outer walls of the hook (225) are respectively connected to the two annular discs (227) by a torsion spring (228). The hook (225) is intermittently and tightly engaged with a slot plate (229). The end of the slot plate (229) away from the hook (225) is fixedly connected to the second railing frame (212).

9. The steel pipe internal and external co-grinding machine according to claim 1, characterized in that: The locking structure includes a slide (230) fixedly connected to the bottom end of the second rail frame (212). The bottom end plate of the grinding machine (1) is provided with a T-shaped slide groove (231) that slides and engages with the slide (230). Multiple plate seats (232) are fixedly connected to the inner wall of the T-shaped slide groove (231).

10. The steel pipe internal and external co-grinding machine according to claim 9, characterized in that: An inclined plate (233) and an inclined plate (234) are fixedly connected to the top two sides of the plate base (232), respectively. A shaft (235) is fixedly connected to the plate near the top of the inclined plate (234). A rotating plate (236) is fixedly connected to the shaft (235). The plate of the rotating plate (236) and the slide (230) can be intermittently fitted. Torsion springs (237) are fixedly connected to the outer walls of the plates at both ends of the rotating plate (236) and the inclined plate (234).

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