Fine grinding treatment device for metal pipe fitting before groove welding

Abstract

The invention is suitable for the technical field of polishing treatment, and provides a metal pipe fitting groove pre-welding fine polishing treatment device which comprises a positioning assembly, a rotating assembly installed in the positioning assembly and an adjusting assembly connected to one end of the rotating assembly, and the rotating assembly is used for driving the adjusting assembly to rotate. The adjusting assembly is used for polishing the end of a metal pipe fitting, the positioning assembly comprises a workbench, two box bodies are symmetrically connected to the top of the workbench, and a three-jaw chuck is arranged on the side wall of one of the box bodies. According to the device, a U-shaped base and a telescopic air cylinder are arranged, a bearing plate is driven to drive a chamfering mechanism to move, a scraper walks and conducts machining according to the shape of the end of a pipe fitting, and the requirement for machining of grooves of different shapes is met.

Description

Technical Field

[0001] The invention relates to the technical field of grinding treatment, and more specifically, to a fine grinding treatment device for metal pipe grooves before welding. Background Art

[0002] When butt welding metal pipes, grooves need to be ground at the joints. Grinding a suitable groove can increase the contact area between the weld root and the filler metal during welding, allowing the welding arc to penetrate the root better, promote the formation of the molten pool, and allow the filler metal to fully fuse with the base material, avoiding welding defects such as incomplete penetration and incomplete fusion, and ensuring that the strength and density of the welded joint meet the requirements.

[0003] When grinding the groove of existing metal pipe fittings, the method of manually grinding the pipe end is adopted, that is, the staff uses an angle grinder to grind around the pipe end to achieve the purpose of groove grinding. However, the manual grinding method is cumbersome and has low precision. In order to improve the processing effect of the groove, the staff improves the existing processing method, that is, the end of the pipe is clamped and fixed, and the groove is processed by mechanical circular cutting, which improves the efficiency and precision of automated processing.

[0004] However, the existing mechanical processing method can only be used to grind the conventional circular ends of pipes. If a special pipe end is to be processed, that is, when one pipe end is connected to the outer wall of another pipe, the pipe end needs to be cut into a special structure that matches the outer wall of the pipe. The existing mechanical processing method cannot effectively perform bevel processing on this special structure, has a single functionality, and is not compatible with the bevel processing required by different pipes. Summary of the invention

[0005] In view of the shortcomings of the prior art, the object of the present invention is to provide a device for fine grinding of the groove of a metal pipe before welding.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a device for fine grinding of metal pipe grooves before welding, comprising a positioning component, a rotating component installed inside the positioning component, and an adjusting component connected to one end of the rotating component, wherein the rotating component is used to drive the adjusting component to rotate, and the adjusting component is used to grind the end of the metal pipe.

[0007] The positioning assembly comprises a workbench, and two boxes are symmetrically connected to the top of the workbench. A three-jaw chuck is arranged on the side wall of one of the boxes, and the rotating assembly and the adjusting assembly are both arranged inside the other box.

[0008] The rotating assembly includes a first electric slide rail installed on one side of the top of the workbench and a second electric slide rail slidably connected to the top of the first electric slide rail, the top of the second electric slide rail is slidably connected to a connecting seat, the first electric slide rail and the second electric slide rail are arranged alternately, and the adjusting assembly is arranged on one side of the connecting seat close to the collecting tank; The adjustment assembly includes a connecting plate arranged on one side of the connecting seat, the connecting plate is arranged vertically, and the connecting plate is slidably connected to two U-shaped seats on a side away from the connecting seat, and a chamfering mechanism and a grinding mechanism are installed on each of the U-shaped seats. The chamfering mechanism and the grinding mechanism on the same U-shaped seat are arranged in an arranged manner in the vertical direction, and the grinding mechanism is arranged on a side away from the corresponding chamfering mechanism toward the middle of the connecting plate.

[0009] A telescopic cylinder is installed inside each U-shaped seat, a piston rod of the telescopic cylinder penetrates the side wall of the corresponding U-shaped seat and is connected to a bearing plate, and a groove is opened on the side wall of each bearing plate.

[0010] A support assembly is provided on a side of the adjustment assembly away from the rotation assembly. The support assembly is suitable for auxiliary support of the metal pipe fitting and for sealing the inner wall of the metal pipe fitting.

[0011] The present invention is further configured as follows: a collecting trough is installed inside the workbench, and an inlet and an outlet are respectively provided at the top and bottom of the collecting trough, the inlet at the top position of the collecting trough passes through the top of the workbench, and a placement bin is provided inside the workbench and at the outlet at the bottom position of the collecting trough.

[0012] The present invention is further configured as follows: a support plate is connected to the inside of a box corresponding to the three-jaw chuck, the three-jaw chuck is rotatably connected to one side of the support plate, and one end of the three-jaw chuck is connected to a placement tube, the placement tube passes through the support plate and the interior of the corresponding box, a drive motor is installed inside the workbench, and a transmission mechanism is installed between the output end of the drive motor and the outer wall of the placement tube.

[0013] By adopting the above technical solution, one end of the metal pipe passes through the placement tube and the inside of the three-jaw chuck and extends between the two boxes. The three-jaw chuck is used to clamp and position the metal pipe. The placement tube simultaneously drives the three-jaw chuck to rotate, causing the metal pipe to rotate on its own, which is convenient for subsequent processing operations. The end of the metal pipe extends to the top of the collection trough. When the end of the metal pipe is processed, the debris generated will fall into the collection trough and slide into the placement bin for collection. When the position of the connecting seat needs to be adjusted, it is only necessary to use the first electric slide rail to drive the second electric slide rail and the connecting seat to move, and the second electric slide rail drives the connecting seat to move for the second time, thereby achieving the purpose of adjusting the position of the connecting seat in two directions at the same time, thereby increasing the compatibility of the device.

[0014] The present invention is further configured as follows: a fixing seat is horizontally installed at one end of the connecting seat away from the adjusting component, a bearing seat and a rotating motor are installed on the top of the fixing seat, the output end of the rotating motor passes through the bearing seat, the connecting seat and the connecting plate in sequence, and the connecting plate is connected to the output end of the rotating motor.

[0015] The present invention is further configured as follows: two guide rails are vertically installed on one side of the connecting plate away from the connecting seat, the two U-shaped seats are slidably connected to the side walls of the two guide rails, and a bidirectional cylinder is vertically installed on the side wall of the connecting plate, and the two output ends of the bidirectional cylinder are respectively connected to the two U-shaped seats.

[0016] The present invention is further configured as follows: two guide rods are connected to one side of the bearing plate close to the corresponding U-shaped seat, the two guide rods are both arranged through the corresponding U-shaped seat, and the chamfering mechanism and grinding mechanism on the same U-shaped seat are both installed inside the groove of the corresponding bearing plate.

[0017] The present invention is further configured as follows: the chamfering mechanism includes a first hinged seat installed inside the corresponding groove, the first hinged seat is rotatably connected to a second hinged seat at one end away from the corresponding bearing plate, a scraper is installed at the end of the second hinged seat, and the angle of the scraper is adjusted by rotating the second hinged seat on the side wall of the first hinged seat to facilitate the processing of different chamfer angles, the side wall of the second hinged seat is threadedly connected with a fixing bolt, and the end of the fixing bolt passes through the second hinged seat and fits with the side wall of the first hinged seat.

[0018] The present invention is further configured as follows: the grinding mechanism includes a grinding head arranged at a corresponding first hinged seat close to the center position of the connecting plate; when the corresponding scraper performs bevel processing on the outer wall of the metal pipe, the grinding head adheres to and grinds the inner wall of the metal pipe to avoid impurities and stains on the inner wall of the metal pipe that affect the subsequent welding and the formation of bubbles; the outer wall of the grinding head is provided with a tapered portion.

[0019] The present invention is further configured as follows: a swing motor is installed on the side wall of each supporting plate, the output end of the swing motor extends to the inside of the groove and is connected to a swing plate, a grinding motor is installed on the side of the swing plate close to the connecting plate, and the output end of the grinding motor passes through the swing plate and is connected to the grinding head.

[0020] By adopting the above technical solution, a U-shaped seat and a telescopic cylinder are set, and the telescopic cylinder drives the corresponding bearing plate to move, thereby driving the chamfering mechanism installed on the bearing plate to be able to move, and adjust the distance between the chamfering mechanism and the end of the metal pipe fitting. The scraper on the chamfering mechanism moves along the special shape of the end of the metal pipe fitting to meet the groove processing requirements of different shapes of the pipe fitting end.

[0021] When the scraper is beveling the outer wall of the metal pipe, the grinding head adheres to and grinds the inner wall of the metal pipe to prevent impurities and stains on the inner wall of the metal pipe from affecting the subsequent welding and causing bubbles. During the grinding process, the grinding head and the corresponding scraper apply pressure to the inner and outer walls of the metal pipe respectively, thereby clamping and processing the end of the metal pipe to alleviate the deformation and bending of the end of the metal pipe.

[0022] The swinging motor is used to drive the swinging plate to swing, and the swinging plate drives the grinding motor and the grinding head to swing synchronously, so that the outer wall of the tapered portion fits with the inner wall of the metal pipe fitting, thereby achieving the purpose of grinding. At this time, the length of the tapered portion is the width of the inner wall of the metal pipe fitting to be ground. When the scraper moves to the position where the end of the metal pipe fitting loses support, the swinging motor drives the swinging plate, the grinding motor and the grinding head to swing toward the axis of the metal pipe fitting. At this time, the outer wall of the grinding head remains in contact with the end of the metal pipe fitting, and the tapered portion is away from the inner wall of the metal pipe fitting. In this state, the inner wall of the metal pipe fitting and the groove position are still in a grinding state, which reduces the area of ​​excessive grinding of the end of the metal pipe fitting, and the grinding of the inner wall of the metal pipe fitting is not affected.

[0023] The present invention is further configured as follows: the supporting assembly includes a rod body horizontally connected to the output end of the rotating motor, the end of the rod body away from the rotating motor is connected to a coupling, the other end of the coupling is connected to a positioning motor, a plate body is vertically installed on the outer shell of the positioning motor, the output end of the positioning motor passes through the plate body and is connected to a rotating plate, four first slide grooves are opened around the side wall of the rotating plate, each of the first slide grooves is slidably connected with a sliding rod, four second slide grooves are opened around the side wall of the plate body, the four second slide grooves and the four sliding rods are correspondingly arranged, the sliding rod is slidably connected to the inside of the corresponding second slide grooves, the end of the sliding rod away from the rotating plate is connected to an extrusion block, the side of the extrusion block away from the rod body is opened with an arc portion, the side of the extrusion block close to the rod body is opened with an inclined portion, and the side of the plate body away from the extrusion block is installed with a supporting cylinder for auxiliary positioning.

[0024] By adopting the above technical solution, the rotating motor drives the adjusting assembly to rotate as a whole for grinding and beveling, while the coupling is disconnected, the supporting cylinder extends and presses against the inner wall of the metal pipe, the positioning motor drives the rotating plate to rotate, and the rotating plate drives the corresponding four sliding rods to slide inside the first slide groove and the second slide groove. During the sliding process, the sliding rod drives the corresponding extrusion block to move toward and fit the inner wall of the metal pipe, so that the four extrusion blocks assist in supporting the inner wall of the metal pipe, and the four extrusion blocks cooperate to support the internal space of the metal pipe, thereby reducing the amount of debris entering the metal pipe.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: (1) By setting a U-shaped seat and a telescopic cylinder, the telescopic cylinder drives the corresponding bearing plate to move, thereby driving the chamfering mechanism installed on the bearing plate to move, and adjusting the distance between the chamfering mechanism and the end of the metal pipe fitting. The scraper on the chamfering mechanism moves along the special shape of the end of the metal pipe fitting to meet the groove processing requirements of different shapes of the end of the pipe fitting.

[0026] (2) When the scraper is beveling the outer wall of the metal pipe, the grinding head is attached to and grinding the inner wall of the metal pipe to prevent impurities and stains on the inner wall of the metal pipe from affecting the subsequent welding and causing bubbles. During the grinding process, the grinding head and the corresponding scraper apply pressure to the inner and outer walls of the metal pipe respectively, thereby clamping and processing the end of the metal pipe to alleviate the deformation and bending of the end of the metal pipe.

[0027] (3) The swinging motor is used to drive the swinging plate to swing, and the swinging plate drives the grinding motor and the grinding head to swing synchronously, so that the outer wall of the tapered part fits with the inner wall of the metal pipe fitting, thereby achieving the purpose of grinding. At this time, the length of the tapered part is the width of the inner wall of the metal pipe fitting to be ground. When the scraper moves to the position where the end of the metal pipe fitting loses support, the swinging motor drives the swinging plate, the grinding motor and the grinding head to swing toward the axis of the metal pipe fitting. At this time, the outer wall of the grinding head keeps fitting with the end of the metal pipe fitting, and the tapered part is away from the inner wall of the metal pipe fitting. In this state, the inner wall of the metal pipe fitting and the groove position are still in the grinding state, which reduces the area of ​​excessive grinding of the end of the metal pipe fitting, and the grinding of the inner wall of the metal pipe fitting is not affected.

[0028] (4) While the rotating motor drives the adjusting assembly to rotate as a whole for grinding and beveling, the coupling is disconnected, the supporting cylinder is extended and pressed against the inner wall of the metal pipe, and the positioning motor drives the rotating plate to rotate. The rotating plate drives the corresponding four sliding rods to slide inside the first slide groove and the second slide groove. During the sliding process, the sliding rod drives the corresponding extrusion block to move toward and fit the inner wall of the metal pipe, thereby enabling the four extrusion blocks to provide auxiliary support to the inner wall of the metal pipe, and the four extrusion blocks cooperate to support the internal space of the metal pipe, thereby reducing the amount of debris entering the metal pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a schematic diagram of the overall structure of a device for fine grinding of metal pipe grooves before welding.

[0030] Figure 2 for Figure 1 Front view structural diagram of .

[0031] Figure 3 for Figure 2 Schematic diagram of the local structure.

[0032] Figure 4It is a schematic diagram of the coordinated structure of the rotating assembly, the adjusting assembly and the supporting assembly in the present invention.

[0033] Figure 5 It is a schematic diagram of the support assembly structure in the present invention.

[0034] Figure 6 for Figure 5 Rear view of the exploded structure.

[0035] Figure 7 It is a schematic diagram of the structure of the regulating component in the present invention.

[0036] Figure 8 for Figure 7 Schematic diagram of the side structure.

[0037] Fig. 9 It is a schematic diagram of the chamfering mechanism structure in the present invention.

[0038] Fig.10 It is a schematic diagram of the grinding mechanism structure in the present invention.

[0039] Fig.11 It is a schematic diagram of the state change of the grinding head in the present invention.

[0040] Description of reference numerals: 1. positioning assembly; 11. workbench; 12. box; 13. collecting tank; 14. three-claw chuck; 15. placement bin; 16. support plate; 17. drive motor; 18. transmission mechanism; 2. Rotating assembly; 21. First electric slide rail; 22. Second electric slide rail; 23. Connecting seat; 24. Fixed seat; 25. Bearing seat; 26. Rotating motor; 3. Adjustment assembly; 31. Connecting plate; 32. Guide rail; 33. U-shaped seat; 34. Loading plate; 35. chamfering mechanism; 351. first hinge seat; 352. second hinge seat; 353. scraper; 354. fixing bolt; 36. grinding mechanism; 361. swing motor; 362. swing plate; 363. grinding motor; 364. grinding head; 365. conical part; 37. Telescopic cylinder; 38. Guide rod; 39. Bidirectional cylinder; 301. Groove; 4. Support assembly; 41. Rod body; 42. Plate body; 43. Rotating plate; 44. Extrusion block; 45. First slide groove; 46. Sliding rod; 47. Support cylinder; 48. Second slide groove; 49. Arc portion; 401. Inclined portion; 402. Positioning motor; 403. Coupling. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0043] See also Figure 1-Figure 11 , the present invention provides the following technical solutions: Embodiment 1, a device for fine grinding of metal pipe grooves before welding, includes a positioning component 1, the positioning component 1 is used to position the metal pipe as a whole and drive the metal pipe to adjust the angle. The specific structure of the positioning component 1 is as follows: See also Figure 1-Figure 3 The positioning assembly 1 includes a workbench 11, and two boxes 12 are symmetrically connected to the top of the workbench 11. A three-jaw chuck 14 is arranged on the side wall of one of the boxes 12. A support plate 16 is connected to the inside of the box 12 corresponding to the three-jaw chuck 14. The three-jaw chuck 14 is rotatably connected to one side of the support plate 16, and one end of the three-jaw chuck 14 is connected to a placement tube, which passes through the support plate 16 and the interior of the corresponding box 12. One end of the metal pipe passes through the placement tube and the interior of the three-jaw chuck 14 and extends between the two boxes 12. The three-jaw chuck 14 is used to clamp and position the metal pipe.

[0044] See also Figure 3 A driving motor 17 is installed inside the workbench 11, and a transmission mechanism 18 is installed between the output end of the driving motor 17 and the outer wall of the placement tube. The transmission mechanism 18 consists of two pulleys and a transmission belt, that is, pulleys are installed on the output end of the driving motor 17 and the outer wall of the placement tube, and the transmission belt is transmitted between the two pulleys. When the driving motor 17 drives the corresponding pulley to rotate, the rotational driving force is applied to the placement tube through the two pulleys and a transmission belt of the transmission mechanism 18, and the placement tube synchronously drives the three-jaw chuck 14 to rotate, causing the metal pipe to rotate, which is convenient for subsequent processing operations.

[0045] See also Figure 3 A collecting tank 13 is installed inside the workbench 11. An inlet and an outlet are respectively arranged at the top and bottom of the collecting tank 13. The inlet at the top of the collecting tank 13 passes through the top of the workbench 11. A placement bin 15 is arranged inside the workbench 11 and at the outlet at the bottom of the collecting tank 13. The end of the metal pipe extends to the top of the collecting tank 13. When the end of the metal pipe is processed, the generated debris will fall into the collecting tank 13 and slide into the placement bin 15 for collection.

[0046] See also Figure 1-Figure 3The positioning assembly 1 is internally installed with a rotating assembly 2, and one end of the rotating assembly 2 is installed with an adjusting assembly 3. The rotating assembly 2 and the adjusting assembly 3 are both arranged inside a box 12 away from the three-jaw chuck 14. The rotating assembly 2 is used to adjust the position of the adjusting assembly 3, so that the adjusting assembly 3 can move to the end position of the metal pipe fitting, and perform groove processing and grinding on the end of the metal pipe fitting. The specific structure of the rotating assembly 2 is as follows: See also Figure 3 and Figure 4 The rotating component 2 includes a first electric slide rail 21 installed on one side of the top of the workbench 11 and a second electric slide rail 22 slidably connected to the top of the first electric slide rail 21. The top of the second electric slide rail 22 is slidably connected with a connecting seat 23. The adjusting component 3 is arranged on the side of the connecting seat 23 close to the collecting tank 13. The first electric slide rail 21 and the second electric slide rail 22 are both stepper motor linear rail slide modules, which are not specifically limited here. The second electric slide rail 22 is connected to the slide seat of the first electric slide rail 21, and the connecting seat 23 is connected to the slide seat of the second electric slide rail 22, and the first electric slide rail 21 and the second electric slide rail 22 are staggered with each other. When the position of the connecting seat 23 needs to be adjusted, it is only necessary to use the first electric slide rail 21 to drive the second electric slide rail 22 and the connecting seat 23 to move, and at the same time, the second electric slide rail 22 drives the connecting seat 23 to move twice, thereby achieving the purpose of adjusting the position of the connecting seat 23 in two directions at the same time, thereby increasing the compatibility of the device.

[0047] See also Figure 3 and Figure 4 A fixing seat 24 is horizontally installed at one end of the connecting seat 23 away from the adjusting component 3, and a bearing seat 25 and a rotating motor 26 are installed on the top of the fixing seat 24. The output end of the rotating motor 26 passes through the bearing seat 25 and the connecting seat 23 in sequence and is connected to the adjusting component 3. The rotating motor 26 is used to drive the adjusting component 3 to rotate. In this process, the bearing seat 25 supports the output end of the rotating motor 26.

[0048] See also Figure 7-Figure 8 The adjusting component 3 includes a connecting plate 31 arranged on one side of the connecting seat 23, the connecting plate 31 is arranged vertically, and two U-shaped seats 33 are arranged on the side of the connecting plate 31 away from the connecting seat 23, and two guide rails 32 are vertically installed on the side of the connecting plate 31 away from the connecting seat 23. The two U-shaped seats 33 are both slidably connected to the side walls of the two guide rails 32, and a two-way cylinder 39 is vertically installed on the side wall of the connecting plate 31. The two output ends of the two-way cylinder 39 are respectively connected to the two U-shaped seats 33, and the two-way cylinder 39 is used to drive the two U-shaped seats 33 to slide on the guide rail 32, thereby adjusting the distance between the two U-shaped seats 33.

[0049] See also Figure 7-Figure 8, each U-shaped seat 33 is equipped with a chamfering mechanism 35, and the chamfering mechanism 35 includes a scraper 353. Through the cooperation of the first electric slide rail 21 and the second electric slide rail 22 and the adjustment of the spacing between the two U-shaped seats 33, the positions of the two groups of chamfering mechanisms 35 are adjusted, so that the two groups of chamfering mechanisms 35 are suitable for beveling and grinding metal pipes with different diameters. When the scrapers 353 on the two groups of chamfering mechanisms 35 are in contact with the ends of the metal pipes, the rotating motor 26 is used to drive the connecting plate 31, the two U-shaped seats 33 and the two groups of chamfering mechanisms 35 to rotate, so that the two groups of chamfering mechanisms 35 rotate around the axis of the metal pipe, and then the bevel at the end of the metal pipe is processed. At the same time, the first electric slide rail 21 and the second electric slide rail 22 cooperate and the spacing between the two U-shaped seats 33 is adjusted to gradually process and shape the bevel.

[0050] Embodiment 2: The existing mechanical processing method can only perform groove processing on the conventional circular end of the pipe. If it is processed for a special pipe end, that is, when one pipe end is connected to the outer wall of another pipe, the pipe end needs to be cut into a special structure that matches the outer wall of the pipe. The existing mechanical processing method cannot effectively perform groove processing on this special structure, has a single functionality, and is not compatible with the groove processing required by different pipes.

[0051] For this purpose, see Figure 7-Figure 11 A telescopic cylinder 37 is installed inside each U-shaped seat 33, and the piston rod of the telescopic cylinder 37 penetrates the side wall of the corresponding U-shaped seat 33 and is connected to a bearing plate 34. Two guide rods 38 are connected to the side of the bearing plate 34 close to the corresponding U-shaped seat 33, and the two guide rods 38 are both set through the corresponding U-shaped seat 33. A groove 301 is opened on the side wall of each bearing plate 34, and the chamfering mechanisms 35 on the same U-shaped seat 33 are all installed inside the groove 301 of the corresponding bearing plate 34. The telescopic cylinder 37 is used to drive the corresponding bearing plate 34 to move, thereby driving the chamfering mechanism 35 installed on the bearing plate 34 to move, and adjusting the distance between the chamfering mechanism 35 and the end of the metal pipe fitting. The scraper 353 on the chamfering mechanism 35 walks and processes along the special shape of the end of the metal pipe fitting to meet the groove processing requirements of different shapes of the end of the pipe fitting.

[0052] When the bearing plate 34 moves, the two guide rods 38 are driven to move synchronously. The two guide rods 38 slide on the U-shaped seat 33 at the same time. The two guide rods 38 cooperate to guide the direction of the bearing plate 34 when it moves, and provide auxiliary support for the bearing plate 34.

[0053] See also Figure 7-Figure 11Each set of chamfering mechanisms 35 also includes a first hinge seat 351 installed inside the corresponding groove 301, and the first hinge seat 351 is rotatably connected to the second hinge seat 352 at one end away from the corresponding bearing plate 34, and a scraper 353 is installed at the end of the second hinge seat 352, and the side wall of the second hinge seat 352 is threadedly connected with a fixing bolt 354, and the end of the fixing bolt 354 passes through the second hinge seat 352 and fits with the side wall of the first hinge seat 351, and the second hinge seat 352 is used to carry the scraper 353, and the second hinge seat 352 is used to rotate on the side wall of the first hinge seat 351 to adjust the angle of the scraper 353, so as to facilitate the processing of different groove angles, and after the relative angle of the first hinge seat 351 and the second hinge seat 352 is adjusted, the fixing bolt 354 is used to rotate and tighten.

[0054] In the third embodiment, during the beveling process of the outer wall of the metal pipe, the special shape of the end of the metal pipe affects the strength of the end of the metal pipe, that is, part of the end of the metal pipe will lose support due to its special shape. Pressure will be applied to the end of the metal pipe during the beveling process, and the position that loses support will bend inward, resulting in the need for secondary shaping after the beveling process.

[0055] To this end, a grinding mechanism 36 is installed between each set of chamfering mechanisms 35 and the corresponding U-shaped seat 33. When the chamfering mechanism 35 performs bevel processing on the outer wall of the metal pipe, the grinding mechanism 36 simultaneously grinds the inner wall of the metal pipe to prevent impurities and stains on the inner wall of the metal pipe from affecting the subsequent welding and causing bubbles. The grinding mechanism 36 also provides auxiliary support for the pressure applied by the chamfering mechanism 35.

[0056] See also Fig.10 The specific structure of the grinding mechanism 36 is as follows: The grinding mechanism 36 includes a grinding head 364 arranged at the corresponding first hinge seat 351 near the center position of the connecting plate 31, and a swing motor 361 is installed on the side wall of each supporting plate 34. The output end of the swing motor 361 extends to the inside of the groove 301 and is connected to a swing plate 362. A grinding motor 363 is installed on the side of the swing plate 362 close to the connecting plate 31. The output end of the grinding motor 363 passes through the swing plate 362 and is connected to the grinding head 364. The grinding motor 363 is used to drive the grinding head 364 to rotate. When the corresponding scraper 353 performs bevel processing on the outer wall of the metal pipe fitting, the grinding head 364 adheres to and grinds the inner wall of the metal pipe fitting to avoid impurities and stains on the inner wall of the metal pipe fitting that affect the subsequent occurrence of bubbles during welding.

[0057] Furthermore, during the grinding process, the grinding head 364 and the corresponding scraper 353 apply pressure to the inner wall and the outer wall of the metal pipe at the same time, thereby clamping and processing the end of the metal pipe to alleviate the deformation and bending of the end of the metal pipe.

[0058] However, since the scraper 353 needs to cut the outer wall of the metal pipe, and the angle at which the scraper 353 applies pressure to the metal pipe is inclined, that is, the force of the inclined extrusion of the metal pipe will be greater than the horizontal support force of the grinding head 364. Although the grinding head 364 is supported inside the metal pipe, the scraper 353 will increase the degree of grinding of the grinding head 364 when squeezing the metal pipe, causing excessive grinding inside the metal pipe.

[0059] For this purpose, see Figure 7-Figure 8 , Figure 10-11 A conical portion 365 is provided on the outer wall of the grinding head 364. First, the swing motor 361 is used to drive the swing plate 362 to swing, and the swing plate 362 drives the grinding motor 363 and the grinding head 364 to swing synchronously, so that the outer wall of the conical portion 365 fits the inner wall of the metal pipe, thereby achieving the purpose of grinding. At this time, the length of the conical portion 365 is the width of the inner wall of the metal pipe to be ground.

[0060] When the scraper 353 moves to the position where the end of the metal pipe loses support, the swing motor 361 drives the swing plate 362, the grinding motor 363 and the grinding head 364 to swing toward the axis of the metal pipe. At this time, the outer wall of the grinding head 364 remains in contact with the end of the metal pipe, and the tapered portion 365 is away from the inner wall of the metal pipe. In this state, the inner wall of the metal pipe and the groove position are still in a grinding state, which reduces the area of ​​excessive grinding of the end of the metal pipe, and the grinding of the inner wall of the metal pipe is not affected.

[0061] During the grinding process, since the lengths of metal pipes are inconsistent, if the debris generated by grinding and beveling falls into the inside of the longer metal pipes, it is difficult to remove them.

[0062] To this end, a support assembly 4 is provided on a side of the adjustment assembly 3 away from the rotation assembly 2 , and the support assembly 4 is suitable for auxiliary support of the metal pipe fitting and for sealing the inner wall of the metal pipe fitting.

[0063] See also Figure 4-Figure 6The support assembly 4 includes a rod body 41 horizontally connected to the output end of the rotating motor 26, and the end of the rod body 41 away from the rotating motor 26 is connected to a coupling 403, and the other end of the coupling 403 is connected to a positioning motor 402. A plate body 42 is vertically installed on the housing of the positioning motor 402. The coupling 403 is used to connect the positioning motor 402 and the rod body 41, that is, when the rotating motor 26 drives the rod body 41 to rotate, the coupling 403 and the positioning motor 402 rotate synchronously, and when the coupling 403 is in a separated state, the rod body 41 rotates alone, and the positioning motor 4 The output end of 02 passes through the plate body 42 and is connected to the rotating plate 43. Four first sliding grooves 45 are arranged around the side wall of the rotating plate 43. A sliding rod 46 is slidably connected to the inside of each first sliding groove 45. Four second sliding grooves 48 are arranged around the side wall of the plate body 42. The four second sliding grooves 48 and the four sliding rods 46 are arranged correspondingly. The sliding rod 46 is slidably connected to the inside of the corresponding second sliding grooves 48. The end of the sliding rod 46 away from the rotating plate 43 is connected to the extrusion block 44, and a supporting cylinder 47 for auxiliary positioning is installed on the side of the plate body 42 away from the extrusion block 44.

[0064] When the metal pipe needs to be processed, the metal pipe is first extended between the two boxes 12, and the support assembly 4 is extended to the inside of the metal pipe. Then, the metal pipe is adjusted to a suitable angle through the cooperation of the drive motor 17 and the transmission mechanism 18, and then kept stationary.

[0065] Subsequently, the piston rod of the supporting cylinder 47 is extended, causing the piston rod of the supporting cylinder 47 to press against the inner wall of the metal pipe, thereby positioning the plate body 42. In this state, the plate body 42 remains stationary, and then the coupling 403 is separated. In this state, the rotating motor 26 drives the adjusting assembly 3 to rotate as a whole for grinding and beveling. At the same time, the positioning motor 402 drives the rotating plate 43 to rotate, and the rotating plate 43 drives the corresponding four sliding rods 46 to slide inside the first slide groove 45 and the second slide groove 48. During the sliding process, the sliding rod 46 drives the corresponding extrusion block 44 to move toward and fit the inner wall of the metal pipe, thereby enabling the four extrusion blocks 44 to provide auxiliary support to the inner wall of the metal pipe.

[0066] See also Figure 6 An arc-shaped portion 49 is provided on the side of the extrusion block 44 away from the rod body 41, and an inclined portion 401 is provided on the side of the extrusion block 44 close to the rod body 41. The arc-shaped portion 49 is provided to enable the extrusion block 44 to fit against the inner wall of the metal pipe, and the inclined portion 401 is used to intercept debris entering the metal pipe. When the debris reaches the position of the inclined portion 401, it slides back into the metal pipe due to the inclination angle of the inclined portion 401 itself, which is convenient for collection. In addition, the four extrusion blocks 44 cooperate to support the internal space of the metal pipe, thereby reducing the amount of debris entering the metal pipe.

[0067] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A device for fine grinding of metal pipe grooves before welding, characterized in that: It comprises a positioning component (1), a rotating component (2) installed inside the positioning component (1), and an adjusting component (3) connected to one end of the rotating component (2), wherein the rotating component (2) is used to drive the adjusting component (3) to rotate, and the adjusting component (3) is used to grind the end of a metal pipe; The positioning assembly (1) comprises a workbench (11), the top of the workbench (11) is symmetrically connected to two boxes (12), a three-jaw chuck (14) is arranged on the side wall of one of the boxes (12), and the rotating assembly (2) and the adjusting assembly (3) are both arranged inside the other box (12); The rotating assembly (2) comprises a first electric slide rail (21) mounted on one side of the top of the workbench (11) and a second electric slide rail (22) slidably connected to the top of the first electric slide rail (21); the top of the second electric slide rail (22) is slidably connected to a connecting seat (23); the first electric slide rail (21) and the second electric slide rail (22) are arranged alternately; and the adjusting assembly (3) is arranged on one side of the connecting seat (23) close to the collecting tank (13); The adjustment assembly (3) comprises a connecting plate (31) arranged on one side of the connecting seat (23), the connecting plate (31) being arranged vertically, and two U-shaped seats (33) being slidably connected to a side of the connecting plate (31) away from the connecting seat (23), each of the U-shaped seats (33) being mounted with a chamfering mechanism (35) and a grinding mechanism (36), the chamfering mechanism (35) and the grinding mechanism (36) on the same U-shaped seat (33) being arranged in a vertical direction, and the grinding mechanism (36) being arranged on a side away from the corresponding chamfering mechanism (35) towards the middle of the connecting plate (31); A telescopic cylinder (37) is installed inside each of the U-shaped seats (33); a piston rod of the telescopic cylinder (37) penetrates the side wall of the corresponding U-shaped seat (33) and is connected to a bearing plate (34); and a groove (301) is formed on the side wall of each of the bearing plates (34); A support assembly (4) is provided on a side of the adjustment assembly (3) away from the rotation assembly (2); the support assembly (4) is suitable for providing auxiliary support to the metal pipe fitting and for sealing the inner wall of the metal pipe fitting.

2. A device for fine grinding of metal pipe grooves before welding according to claim 1, characterized in that: A collecting tank (13) is installed inside the workbench (11), and an inlet and an outlet are respectively arranged at the top and bottom of the collecting tank (13); the inlet at the top of the collecting tank (13) passes through the top of the workbench (11), and a placement bin (15) is arranged inside the workbench (11) and at the outlet at the bottom of the collecting tank (13).

3. A device for fine grinding of metal pipe grooves before welding according to claim 2, characterized in that: A support plate (16) is connected to the interior of the box (12) corresponding to the three-jaw chuck (14); the three-jaw chuck (14) is rotatably connected to one side of the support plate (16); one end of the three-jaw chuck (14) is connected to a placement tube, and the placement tube passes through the support plate (16) and the interior of the corresponding box (12); a drive motor (17) is installed inside the workbench (11); and a transmission mechanism (18) is installed between the output end of the drive motor (17) and the outer wall of the placement tube.

4. A device for fine grinding of metal pipe grooves before welding according to claim 1, characterized in that: A fixing seat (24) is horizontally mounted on one end of the connecting seat (23) away from the adjusting assembly (3); a bearing seat (25) and a rotating motor (26) are mounted on the top of the fixing seat (24); an output end of the rotating motor (26) passes through the bearing seat (25), the connecting seat (23) and the connecting plate (31) in sequence; and the connecting plate (31) is connected to the output end of the rotating motor (26).

5. The device for fine grinding of metal pipe grooves before welding according to claim 1, characterized in that: Two guide rails (32) are vertically mounted on one side of the connecting plate (31) away from the connecting seat (23); the two U-shaped seats (33) are slidably connected to the side walls of the two guide rails (32); a bidirectional cylinder (39) is vertically mounted on the side wall of the connecting plate (31); two output ends of the bidirectional cylinder (39) are respectively connected to the two U-shaped seats (33).

6. A device for fine grinding of metal pipe grooves before welding according to claim 5, characterized in that: Two guide rods (38) are connected to one side of the bearing plate (34) close to the corresponding U-shaped seat (33), and the two guide rods (38) are both arranged to penetrate the corresponding U-shaped seat (33). The chamfering mechanism (35) and the grinding mechanism (36) on the same U-shaped seat (33) are both installed inside the groove (301) of the corresponding bearing plate (34).

7. The device for fine grinding of metal pipe grooves before welding according to claim 1, characterized in that: The chamfering mechanism (35) comprises a first hinge seat (351) installed inside the corresponding groove (301); one end of the first hinge seat (351) away from the corresponding bearing plate (34) is rotatably connected to a second hinge seat (352); a scraper (353) is installed at the end of the second hinge seat (352); the angle of the scraper (353) is adjusted by rotating the second hinge seat (352) on the side wall of the first hinge seat (351), so as to facilitate the processing of different bevel angles; a fixing bolt (354) is threadedly connected to the side wall of the second hinge seat (352); the end of the fixing bolt (354) passes through the second hinge seat (352) and fits with the side wall of the first hinge seat (351).

8. The device for fine grinding of metal pipe grooves before welding according to claim 7, characterized in that: The grinding mechanism (36) comprises a grinding head (364) arranged at a center position of the corresponding first hinge seat (351) close to the connecting plate (31); when the corresponding scraper (353) performs groove processing on the outer wall of the metal pipe, the grinding head (364) adheres to and grinds the inner wall of the metal pipe to prevent impurities and stains on the inner wall of the metal pipe from affecting the formation of bubbles during subsequent welding; the outer wall of the grinding head (364) is provided with a tapered portion (365).

9. A device for fine grinding of metal pipe grooves before welding according to claim 8, characterized in that: A swing motor (361) is installed on the side wall of each of the bearing plates (34); the output end of the swing motor (361) extends to the inside of the groove (301) and is connected to a swing plate (362); a grinding motor (363) is installed on a side of the swing plate (362) close to the connecting plate (31); the output end of the grinding motor (363) passes through the swing plate (362) and is connected to a grinding head (364).

10. The device for fine grinding of metal pipe grooves before welding according to claim 4, characterized in that: The support assembly (4) comprises a rod body (41) horizontally connected to the output end of the rotating motor (26); one end of the rod body (41) away from the rotating motor (26) is connected to a coupling (403); the other end of the coupling (403) is connected to a positioning motor (402); a plate body (42) is vertically mounted on the housing of the positioning motor (402); the output end of the positioning motor (402) passes through the plate body (42) and is connected to a rotating plate (43); four first sliding grooves (45) are arranged around the side wall of the rotating plate (43); each of the first sliding grooves (45) is slidably connected to a sliding rod (46); Four second slide grooves (48) are formed around the side wall of the plate body (42), and the four second slide grooves (48) and four sliding rods (46) are arranged correspondingly. The sliding rods (46) are slidably connected to the inside of the corresponding second slide grooves (48). An end of the sliding rod (46) away from the rotating plate (43) is connected to an extrusion block (44), and an arc portion (49) is formed on the side of the extrusion block (44) away from the rod body (41). An inclined portion (401) is formed on the side of the extrusion block (44) close to the rod body (41). A supporting cylinder (47) for auxiliary positioning is installed on the side of the plate body (42) away from the extrusion block (44).

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