CN214109798U - Inner ring welding seam sharpening machine - Google Patents

Abstract

The utility model discloses an inner ring weld grinding machine, which comprises a clamping device, a rough positioning device, a fine grinding device and a rotating device; the clamping devices are arranged at two ends of the inner circumferential weld grinding machine and used for positioning the inner circumferential weld grinding machine in the position of the welding pipe; the coarse positioning device is movably arranged on the central shaft and comprises a positioning assembly and a positioning wheel, the positioning assembly controls the positioning wheel to be pre-pressed on the inner side wall of the welded pipe, and the fine grinding device is coarsely positioned; the fine grinding device is arranged on the right side of the coarse positioning device and is used for performing fine grinding on the inner wall of the welding pipe; the rotating device is arranged on the left side of the coarse positioning device, drives the coarse positioning device and the fine grinding device to rotate in the welding pipe, and grinds the inner wall of the welding pipe in a surrounding manner.

Description

Inner ring welding seam sharpening machine

Technical Field

The utility model relates to a welded tube inner joint coping processing equipment technical field, concretely relates to inner circumferential weld coping machine.

Background

At present, the unprocessed weld joints in the welded pipes in the welded pipe industry are mostly processed manually, large-diameter welded pipes are climbed into the pipes for coping by workers holding electric grinding wheels, small-diameter welded pipes are processed by holding the electric grinding wheels by workers and performing mould trimming on the parts, which are away from the pipe ends, outside the pipes by holding the electric grinding wheels, the parts, which are far away from the pipe ends, cannot be processed and can only be used for downshifting, but in the processing of the weld joints in the welded pipes with higher processing requirements, such as the welded pipes in the nuclear industry and the welded pipes in missile launching cylinders, the downshifting processing cannot be performed due to high requirements on precision and safety coefficients, so the problem of coping the weld joints in the high-precision steel pipe pipelines becomes a big problem in the technical field of weld joint processing;

meanwhile, the manual weld joint treatment in the prior art has the following defects and shortcomings: (1) although the large-diameter pipeline can be ground for the whole length, the working environment of workers is poor, and the welding seams inside the pipeline are required to be ground completely, so that the labor intensity of the workers is high; (2) due to different inner diameters of different pipelines, strain on the waist of a worker is large, and after the grinding is finished by the electric grinding wheel, powder is not easy to diffuse in a narrow space, so that respiratory diseases of the worker are easily caused; (3) the small-diameter pipeline can not be repaired in full length, and the use requirement of high-precision welded pipes is difficult to meet.

SUMMERY OF THE UTILITY MODEL

To the problem that exists, the utility model aims at providing an inner circumferential weld grinding machine fixes the welding seam department at needs coping through clamping device with this inner circumferential weld grinding machine, utilizes thick positioner to make the coping cutter fix the welding seam department at needs coping, and rotary device drives the finish grinding device and carries out the coping to pipeline inner weld department, realizes carrying out the coping to the inside welding seam district of pipeline of different internal diameters, has the characteristics that the coping precision is high, convenient to use is simple.

In order to achieve the above object, the utility model adopts the following technical scheme:

an inner ring weld seam sharpening machine comprises a clamping device, a coarse positioning device, a fine sharpening device and a rotating device; the clamping devices are arranged at two ends of the inner circumferential weld grinding machine and used for positioning the inner circumferential weld grinding machine in the position of the welding pipe; the coarse positioning device is movably arranged on the central shaft and comprises a positioning assembly and a positioning wheel, the positioning assembly controls the positioning wheel to be pre-pressed on the inner side wall of the welded pipe, and the fine grinding device is coarsely positioned; the fine grinding device is arranged on the right side of the coarse positioning device and is used for performing fine grinding on the inner wall of the welding pipe; the rotating device is arranged on the left side of the coarse positioning device and drives the coarse positioning device and the fine grinding device to rotate in the welding pipe to grind the inner wall of the welding pipe in a surrounding manner.

Preferably, clamping device include left end clamping component and right-hand member clamping component, left end clamping component and right-hand member clamping component all include unable adjustment base, activity base and pinch roller, unable adjustment base and activity base symmetry set up, the last a plurality of first digging arms that are provided with of unable adjustment base, first digging arm corresponds with the second digging arm that sets up on the activity base and articulates, the pinch roller sets up the front end at the second digging arm, activity base is fixed mounting respectively at the both ends of center pin.

Preferably, the right end clamping component further comprises an air cylinder and a pull rod, the air cylinder is installed in the installation groove of the right end fixing base, the end portion of an air cylinder piston rod is connected with one end of the pull rod, the other end of the pull rod is connected with the fixing base of the left end clamping component, and the pull rod is movably installed in the central shaft.

Preferably, the clamping wheel is of a cam structure and is installed in a clamping wheel installation groove through a fixing assembly, and the clamping wheel installation groove is formed in the top end of the second movable arm; the fixing assembly comprises two torsion springs, a fixing shaft and a fixing nut, the fixing shaft penetrates through the clamping wheel, the torsion springs are mounted on two sides of the clamping wheel, and the fixing nut is connected with two ends of the fixing shaft; one ends of the two torsion springs are fixedly connected with the side edge of the clamping wheel, the other ends of the two torsion springs are fixedly connected with the inner side wall of the clamping wheel mounting groove, and the two torsion springs are oppositely arranged on two sides of the clamping wheel.

Preferably, the locating component include location guide rail, the worm, the butterfly gasket, location driving motor and worm wheel, the location guide rail passes through joint groove slidable mounting on rotary unit, and install the locating wheel in location guide rail upper end, rotary unit is last to be provided with the center pin mounting hole and to use with the center pin cooperation, rotary unit is last still to be provided with worm telescopic hole, worm telescopic hole uses with the cooperation of the upper end no silk portion of worm, the worm passes through fixation nut and butterfly gasket and installs on the location guide rail, worm and worm wheel intermeshing, the worm wheel is connected with location driving motor's power take off end, location driving motor installs on the mounting bracket of rotary unit downside.

Preferably, the fine grinding device comprises a tool rest, a grinding assembly and a depth control assembly, the tool rest is slidably connected with the positioning guide rail, the depth control assembly is mounted on the positioning guide rail, the relative position of the tool rest and the positioning guide rail is controlled, and the grinding assembly is mounted on the tool rest.

Preferably, the coping component comprises a cutter rotating motor, a coping cutter, a first helical gear and a second helical gear, the power output end of the cutter rotating motor is connected with the first helical gear, the first helical gear is meshed with the second helical gear, the second helical gear is connected with the coping cutter through a transmission shaft, and the coping cutter is arranged in a coping cutter mounting groove at the upper end of the cutter rest.

Preferably, the depth control assembly comprises a grinding feeding servo motor, a first gear, a second gear, a toothed belt, a third gear and a rotating shaft, the grinding feeding servo motor is arranged on the right side of the positioning guide rail, the power output end of the grinding feeding servo motor is connected with the first gear, the first gear is connected with the second gear through the toothed belt, the second gear is sleeved on the rotating shaft, the rotating shaft is arranged on the positioning guide rail, the upper end of the rotating shaft is in threaded connection with the third gear, one side of the third gear is fixedly clamped in the tool rest, and the rotating shaft rotates to drive the tool rest to move up and down.

Preferably, the rotating device comprises a rotary speed reducer, a fourth gear and a rotary unit driven fluted disc, the rotary speed reducer is fixedly installed on the outer side of the central shaft, the fourth gear is installed at the power output end of the rotary speed reducer, the fourth gear is meshed with the teeth of the rotary unit driven fluted disc, and spiral bevel teeth are arranged on the right side of the rotary unit driven fluted disc and are clamped with the spiral bevel teeth on the right side of the rotary unit.

The utility model has the advantages that: the utility model discloses an inner ring weld sharpening machine compares with prior art, the utility model discloses an improve part and lie in:

(1) the utility model designs an inner circumferential weld grinding machine, which comprises a clamping device, wherein a cylinder piston rod of the clamping device drives a pull rod and a clamping wheel to fix the inner circumferential weld grinding machine in a region needing grinding in a welded pipe, and the fixing mode is simple and convenient to disassemble;

(2) the positioning device drives the worm to adjust the position of the positioning wheel through the positioning driving motor, so that the positioning wheel can be attached to the inner wall of the welded pipe, the position of the inner circumferential weld grinding machine is further fixed, and the position of the mechanism can float in a small range through a disc-shaped gasket when the coarse positioning device rotates;

(3) the inner ring weld seam sharpening machine also comprises a fine sharpening device, and when the inner ring weld seam sharpening machine is used, the servo feeding module can drive the tool rest to perform feeding motion relative to the positioning guide rail, so that the depth of cut can be accurately adjusted, and the effect of fine sharpening can be realized;

(4) the rotating device drives the coarse positioning device and the fine grinding device to accurately grind the inner wall of the welding pipe so as to meet the design and use requirements of the high-precision welding pipe, and the grinding device has the advantages of convenience in use, high grinding precision and convenience in fixing and dismounting.

Drawings

Fig. 1 is the structure schematic diagram of the inner ring weld grinding machine of the utility model.

Fig. 2 is a schematic structural view of the left clamping assembly of the present invention.

Fig. 3 is a schematic structural view of the right clamping assembly of the present invention.

Fig. 4 is a schematic structural view of the fixing assembly of the present invention.

Fig. 5 is a schematic structural view of the tightening wheel of the present invention.

Fig. 6 is a schematic structural view of the torsion spring of the present invention.

Fig. 7 is the structure schematic diagram of the middle structure of the inner circumferential weld grinding machine of the utility model.

Fig. 8 is a right side view of the positioning assembly of the present invention.

Fig. 9 is a front view of the positioning assembly of the present invention.

Fig. 10 is a schematic structural diagram of the transmission principle of the positioning assembly of the present invention.

Fig. 11 is a schematic structural diagram of the rotating unit of the present invention.

Fig. 12 is a front view of the fine grinding device of the present invention.

Fig. 13 is a front view of the sharpening assembly of the present invention.

Fig. 14 is a front view of the depth control assembly of the present invention.

Fig. 15 is a front view of the rotating device of the present invention.

FIG. 16 is a flow chart of the inner circumferential weld grinding machine of the present invention.

Wherein: 1. the grinding machine comprises a cylinder, 101, a fixed base, 102, a first movable arm, 103, a second movable arm, 1031, a clamping wheel mounting groove, 104, a movable base, 2, a pull rod, 3, a clamping wheel, 31, a fixed shaft, 32, a fixed nut, 33, a torsion spring, 4, a central shaft, 5, a cutter rotating motor, 51, a first bevel gear, 52, a second bevel gear, 6, a grinding and feeding servo motor, 61, a first gear, 62, a second gear, 63, a same-tooth toothed belt, 64, a third gear, 65, a rotating shaft, 7, a grinding cutter, 71, a cutter rest, 711, a sliding groove, 8, a positioning wheel, 9, a rotating speed reducer, 91, a fourth gear, 10, a rotating unit driven fluted disc, 11, a positioning guide rail, 111, a sliding rail, 12, a worm, 121, an upper end threadless part, 13, a butterfly gasket, 14, a positioning driving motor, 141, 142 and a rotating unit, 1421. central shaft mounting hole, 1422, worm telescoping hole.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

Referring to fig. 1-16, an inner circumferential weld grinding machine comprises a clamping device, a rough positioning device, a fine grinding device and a rotating device; the clamping devices are arranged at two ends of the inner circumferential weld grinding machine and used for positioning the inner circumferential weld grinding machine in the position of the welding pipe; the coarse positioning device is movably arranged on the central shaft 4 and comprises a positioning assembly and a positioning wheel 8, the positioning assembly controls the positioning wheel 8 to be pre-pressed on the inner side wall of the welded pipe, and the fine grinding device is coarsely positioned; the fine grinding device is arranged on the right side of the coarse positioning device and is used for performing fine grinding on the inner wall of the welding pipe; the rotating device is arranged on the left side of the coarse positioning device and drives the coarse positioning device and the fine grinding device to rotate in the welding pipe to grind the inner wall of the welding pipe in a surrounding manner.

Preferably, the clamping device comprises a left-end clamping assembly and a right-end clamping assembly, the left-end clamping assembly and the right-end clamping assembly respectively comprise a fixed base 101, a movable base 104 and a clamping wheel 3, the fixed base 101 and the movable base 104 are symmetrically arranged, a plurality of first movable arms 102 are arranged on the fixed base 101, the first movable arms 102 are correspondingly hinged with second movable arms 103 arranged on the movable base 104 one by one, the clamping wheel 3 is arranged at the front end of the second movable arms 103, and the movable bases 104 are respectively and fixedly arranged at two ends of the central shaft 4; the right end clamping assembly further comprises an air cylinder 1 and a pull rod 2, the air cylinder 1 is installed in an installation groove of the right end fixing base 101, the end of a piston rod of the air cylinder 1 is connected with one end of the pull rod 2, the other end of the pull rod 2 is connected with the fixing base 101 of the left end clamping assembly, and the pull rod 2 is movably installed (sleeved) in the central shaft 4; when the inner circumferential weld grinding machine is used, when the position of the inner circumferential weld grinding machine in a welded pipe needs to be located, pressure can be reduced through the air cylinder 1, a piston rod of the air cylinder 1 retracts, the pull rod 2 is driven to move rightwards, the fixed base 101 and the movable base 104 on the left end clamping assembly and the right end clamping assembly move oppositely, the front arms of the first movable arm 102 and the second movable arm 103 stretch towards the periphery under the action of the hinge force (the principle is the same as that of an umbrella), the clamping wheel 3 is enabled to stretch and tightly contact with the inner wall of the pipeline of the welded pipe, clamping is achieved, the position of the inner circumferential weld grinding machine in the welded pipe is located, and on the contrary, after grinding is finished, the air cylinder 1 is pressurized, the piston rod is enabled to stretch, and the clamping wheel 3 is loosened.

Preferably, the pinch wheel 3 is a cam structure and is installed in a pinch wheel installation groove 1031 through a fixing component, and the pinch wheel installation groove 1031 is arranged at the top end of the second movable arm 103; the fixing assembly comprises two torsion springs 33, a fixing shaft 31 and a fixing nut 32, the fixing shaft 31 penetrates through the clamping wheel 3, the clamping wheel 3 rotates by taking the fixing shaft 31 as a shaft, the torsion springs 33 are mounted on two sides of the clamping wheel 3 to reset the clamping wheel 3, and the fixing nut 32 is connected with two ends of the fixing shaft 31 to fix the position of the fixing shaft 31; one end of each of the two torsion springs 33 is fixedly connected with the side edge of the clamping wheel 3, the other end of each of the two torsion springs 33 is fixedly connected with the inner side wall of the tightening wheel mounting groove 1031, and the two torsion springs 33 are oppositely arranged on the two sides of the clamping wheel 3 to form a double-torsion spring structure, when the double-torsion spring structure is used, when one side top surface (the upper top surface of the cam shown in fig. 5) of the clamping wheel 3 is pressed against the inner wall of the welded pipe, and under the action of the cylinder 1, the clamping wheel 3 rotates by taking the fixed shaft 31 as a shaft, so that the lower top surface of the cam rotates upwards and is mutually extruded with the inner wall of the welded pipe to position the sharpening machine, the workload of the cylinder 1 can be reduced, and meanwhile, the fixed radius between the sharpening machine and the inner wall of the welded pipe (suitable for the welded pipe with larger inner diameter) can be increased by using the cam structure; and when the pinch roller 3 uses the fixed axle 31 to rotate as the axle, set up two torsion spring 33 in pinch roller 3 both sides respectively by twisting and the antitorque twist, consequently after accomplishing fixed and welding seam coping, when pinch roller 3 is reset rapidly with what intention under two torsion spring 33's effort and reaction, and because torsion spring 33 forms two torsional spring structures, consequently it has a balanced state that resets, can effectively guarantee that the reset position of the back pinch roller 3 that resets is the same with the design position, be convenient for carry out the coping next time, simultaneously the utility model discloses a pinch roller 3's both sides set up torsion spring 33 can play certain cushioning effect, prevent that the coping mechanism of this device from when rotatory coping, produce the vibration, cause the interior coping unevenness of welded tube, guarantee the coping quality.

Preferably, the positioning assembly comprises a positioning guide rail 11, a worm 12, a butterfly-shaped gasket 13, a positioning driving motor 14 and a worm wheel 141, the positioning guide rail 11 is slidably mounted on the rotating unit 142 through a clamping groove, the upper end of the positioning guide rail 11 is provided with a positioning wheel 8, the rotating unit 142 is provided with a central shaft mounting hole 1421 matched with a central shaft 4 for use, the central shaft 4 penetrates through the central shaft mounting hole 1421, the rotating unit 142 is further provided with a worm telescopic hole 1422, the worm telescopic hole 1422 is matched with a threadless part 121 at the upper end of the worm 12 for use, the worm 12 extends and moves up and down, the worm 12 is mounted on the positioning guide rail 11 through a fixing nut and the butterfly-shaped gasket 13, the worm 12 is meshed with the worm wheel 141, and the worm wheel 141 is connected with a power output end of the positioning driving motor 14; when in use, the positioning driving motor 14 drives the worm wheel 141 to rotate, the worm wheel 141 drives the worm 12 to move upwards or downwards through the meshing force of teeth and teeth (the positioning driving motor 14 rotates forwards, the worm 12 moves upwards, the positioning driving motor 14 rotates backwards, the worm 12 moves downwards), the upper end non-silk part 121 of the worm 12 moves upwards and downwards in the worm telescopic hole 1422 (because the upper end non-silk part 121 is not provided with an outer silk, the rotating unit cannot be caused to rotate around), thereby driving the positioning guide rail 11 to move upwards or downwards, so that in the welding pipes with different diameters, the positioning wheels can tightly abut against the inner wall of the welding pipe, and when the whole positioning assembly rotates along with the rotating unit 142, the position of the positioning assembly can float in a small range by the aid of the disc-shaped gasket 13, absolute rigid contact with the inner wall of the welded pipe is reduced, and the welded pipe and the inner ring welding seam sharpening machine are protected.

The fine grinding device comprises a tool rest 71, a grinding assembly and a depth control assembly, wherein a sliding rail 111 is arranged on the right side of the positioning guide rail 11, the sliding rail 111 is matched with a sliding groove 711 arranged on the left side of the tool rest 71 for use, so that the tool rest 71 is in sliding connection with the positioning guide rail 11, the depth control assembly is arranged on the positioning guide rail 11, and the relative position of the tool rest 71 and the positioning guide rail 11 is controlled, so that the depth size of a cutter during grinding of the depth control assembly is controlled, the grinding assembly is arranged on the tool rest 71 and moves up and down along with the tool rest, and grinding processing is carried out on a welding line needing grinding in a welding pipe;

the sharpening assembly comprises a cutter rotating motor 5, a sharpening cutter 7, a first helical gear 51 and a second helical gear 52, the power output end of the cutter rotating motor 5 is connected with the first helical gear 51, the first helical gear 51 is meshed with the second helical gear 52, the second helical gear 52 is connected with the sharpening cutter 7 through a transmission shaft, and the sharpening cutter 7 is installed in a sharpening cutter installation groove at the upper end of a cutter holder 71; when the grinding device is used, the cutter rotating motor 5 provides power required by rotation of the first bevel gear 51 to drive the first bevel gear 51 to rotate, the first bevel gear 51 drives the second bevel gear 52 to rotate through meshing force between teeth, the second bevel gear 52 drives the grinding cutter 7 to rotate through a transmission shaft, and the grinding cutter 7 is used for grinding a welding line needing grinding in the welding pipe;

the depth control assembly comprises a grinding and feeding servo motor 6, a first gear 61, a second gear 62, a cogged belt 63, a third gear 64 and a rotating shaft 65, the grinding and feeding servo motor 6 is arranged on the right side of the positioning guide rail 11, the power output end of the grinding and feeding servo motor 6 is connected with the first gear 61, the first gear 61 is connected with the second gear 62 through the cogged belt 63, the second gear 62 is sleeved on the rotating shaft 65, the rotating shaft 65 is installed on the positioning guide rail 11, the upper end of the rotating shaft 65 is in threaded connection with the third gear 64, one side of the third gear 64 is fixedly clamped in a tool rest 71, and the rotating shaft 65 rotates to drive the tool rest to move up and down; when in use, because the inner diameter of the welded pipe is different from the thickness of the welded pipe, in order to better polish the welded pipe inner wall, the depth of a polishing cutter needs to be increased, the grinding feeding servo motor 6 is opened to drive the first gear 61 to rotate, the first gear 61 drives the second gear 62 to rotate through the driving action of the toothed belt 63 with the same teeth, the second gear 62 is connected with the lower part of the rotating shaft 65 in a clamping way, therefore, the second gear 62 drives the rotating shaft 65 (the rotating shaft 65 is installed on the positioning guide rail 11) to rotate, and because the rotating shaft 65 is in threaded connection with the third gear 64, half of the third gear 64 is clamped on the tool holder 71, when the rotating shaft 65 rotates, the third gear 64 cannot rotate in the horizontal direction, so that the rotating shaft 65 drives the third gear 64 to move up and down, the vertical position of the tool rest 71 is adjusted, and the depth of the sharpening tool 7 is controlled to meet sharpening requirements of welded pipes and welded seams with different diameters.

Preferably, the rotating device includes a rotary speed reducer 9, a fourth gear 91 and a rotary unit driven gear disk 10, the rotary speed reducer 9 is fixedly installed on the outer side of the central shaft 4, the fourth gear 91 is installed on the power output end of the rotary speed reducer 9, the fourth gear 91 is engaged with the teeth of the rotary unit driven gear disk 10, a spiral bevel gear is provided on the right side of the rotary unit driven gear disk 10 and is tightly engaged with the spiral bevel gear provided on the right side of the rotary unit 142, when in use, the rotary speed reducer 9 is fixedly installed on the outer side of the central shaft 4, so when the rotary speed reducer 9 provides rotary power, the fourth gear 91 rotates, the fourth gear 91 drives the rotary unit driven gear disk 10 and the rotary unit 142 to coaxially rotate through the engaging force between the teeth (the spiral bevel gear on the right side of the rotary unit driven gear disk 10 is engaged with the spiral bevel gear on the left side of the rotary unit 142, and the mutual locking) is realized, and the coarse positioning device and the fine grinding device carry out rotary grinding treatment on the welding line needing grinding in the welding pipe.

Preferably, the inner circumferential weld seam sharpening machine further comprises a power device (a power trolley) and a laser detection device, the power device is mounted on the right side of the inner circumferential weld seam sharpening machine when in use, power is provided for the inner circumferential weld seam sharpening machine, the inner circumferential weld seam sharpening machine is enabled to enter a pipeline needing sharpening, when the inner circumferential weld seam sharpening machine moves to the position close to the position needing sharpening, the laser detection device can align the center of a cutter with a weld seam, the power trolley stops, the air cylinder 1 works, the clamping mechanism opens and clamps the inner circumferential weld seam, after clamping is completed, the positioning wheel 8 is pre-pressed to the inner side of the pipe wall by the positioning device, the cutter rotating motor 5 drives the sharpening cutter 7 to rotate, the grinding feeding servo motor 6 slowly operates and drives the cutter rest 71 to move, and therefore the depth of the cutter is determined; and then, the rotating device operates to drive the tool rest to rotate for 360 degrees for grinding, after grinding is finished, the air cylinder is opened again to tighten the clamping mechanism, and the inner circumferential weld grinding machine is pulled out by using the trolley.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides an inner ring welding seam sharpening machine which characterized in that: comprises a clamping device, a rough positioning device, a fine grinding device and a rotating device; the clamping devices are arranged at two ends of the inner circumferential weld grinding machine and used for positioning the inner circumferential weld grinding machine in the position of the welding pipe; the coarse positioning device is movably arranged on the central shaft (4) and comprises a positioning assembly and a positioning wheel (8), the positioning assembly controls the positioning wheel (8) to be pre-pressed on the inner side wall of the welded pipe, and the fine grinding device is coarsely positioned; the fine grinding device is arranged on the right side of the coarse positioning device and is used for performing fine grinding on the inner wall of the welding pipe; the rotating device is arranged on the left side of the coarse positioning device and drives the coarse positioning device and the fine grinding device to rotate in the welding pipe to grind the inner wall of the welding pipe in a surrounding manner.

2. The inner girth weld sharpening machine according to claim 1, wherein: clamping device include left end clamping component and right-hand member clamping component, left end clamping component and right-hand member clamping component all include unable adjustment base (101), movable base (104) and pinch roller (3), unable adjustment base (101) and movable base (104) symmetry set up, be provided with a plurality of first digging arms (102) on unable adjustment base (101), first digging arm (102) correspond with second digging arm (103) of setting on movable base (104) and articulate, pinch roller (3) set up the front end at second digging arm (103), movable base (104) are fixed mounting respectively at the both ends of center pin (4).

3. The inner girth weld sharpening machine according to claim 2, wherein: the right-end clamping component further comprises an air cylinder (1) and a pull rod (2), the air cylinder (1) is installed in the installation groove of the right-end fixing base (101), the end portion of a piston rod of the air cylinder (1) is connected with one end of the pull rod (2), the other end of the pull rod (2) is connected with the fixing base (101) of the left-end clamping component, and the pull rod (2) is movably installed in the central shaft (4).

4. The inner girth weld sharpening machine according to claim 3, wherein: the clamping wheel (3) is of a cam structure and is arranged in a clamping wheel mounting groove (1031) through a fixing component, and the clamping wheel mounting groove (1031) is arranged at the top end of the second movable arm (103); the fixing assembly comprises two torsion springs (33), a fixing shaft (31) and a fixing nut (32), the fixing shaft (31) penetrates through the clamping wheel (3), the torsion springs (33) are mounted on two sides of the clamping wheel (3), and the fixing nut (32) is connected with two ends of the fixing shaft (31); one end of each of the two torsion springs (33) is fixedly connected with the side edge of the clamping wheel (3), the other end of each of the two torsion springs is fixedly connected with the inner side wall of the clamping wheel mounting groove (1031), and the two torsion springs (33) are oppositely arranged on two sides of the clamping wheel (3).

5. The inner girth weld sharpening machine according to claim 1, wherein: the positioning assembly comprises a positioning guide rail (11), a worm (12), a butterfly gasket (13), a positioning driving motor (14) and a worm wheel (141), the positioning guide rail (11) is slidably arranged on the rotating unit (142) through a clamping groove, and a positioning wheel (8) is installed at the upper end of the positioning guide rail (11), a central shaft installation hole (1421) is formed in the rotating unit (142) and is matched with the central shaft (4) for use, a worm telescopic hole (1422) is further formed in the rotating unit (142), the worm telescopic hole (1422) is matched with the upper end threadless part (121) of the worm (12) for use, the worm (12) is installed on the positioning guide rail (11) through a fixing nut and a butterfly gasket (13), the worm (12) is meshed with a worm wheel (141), the worm wheel (141) is connected with the power output end of the positioning driving motor (14), and the positioning driving motor (14) is installed on an installation frame on the lower side of the rotating unit (142).

6. The inner girth weld sharpening machine according to claim 5, wherein: the fine grinding device comprises a tool rest (71), a grinding assembly and a depth control assembly, wherein the tool rest (71) is in sliding connection with the positioning guide rail (11), the depth control assembly is installed on the positioning guide rail (11), the relative position of the tool rest (71) and the positioning guide rail (11) is controlled, and the grinding assembly is installed on the tool rest (71).

7. The inner girth weld sharpening machine according to claim 6, wherein: the grinding assembly comprises a cutter rotating motor (5), a grinding cutter (7), a first helical gear (51) and a second helical gear (52), the power output end of the cutter rotating motor (5) is connected with the first helical gear (51), the first helical gear (51) is meshed with the second helical gear (52), the second helical gear (52) is connected with the grinding cutter (7) through a transmission shaft, and the grinding cutter (7) is installed in a grinding cutter installation groove in the upper end of a cutter frame (71).

8. The inner girth weld sharpening machine according to claim 6, wherein: the depth control assembly comprises a grinding feeding servo motor (6), a first gear (61), a second gear (62), a toothed belt (63) with same teeth, a third gear (64) and a rotating shaft (65), the grinding feeding servo motor (6) is arranged on the right side of a positioning guide rail (11), a power output end of the grinding feeding servo motor (6) is connected with the first gear (61), the first gear (61) is connected with the second gear (62) through the toothed belt (63) with same teeth, the second gear (62) is sleeved on the rotating shaft (65), the rotating shaft (65) is installed on the positioning guide rail (11), the upper end of the rotating shaft (65) is in threaded connection with the third gear (64), one side of the third gear (64) is fixedly clamped in a tool rest (71), and the rotating shaft (65) rotates to drive the tool rest to move up and down.

9. The inner girth weld sharpening machine according to claim 5, wherein: the rotating device comprises a rotating speed reducer (9), a fourth gear (91) and a rotating unit driven fluted disc (10), wherein the rotating speed reducer (9) is fixedly installed on the outer side of a central shaft (4), the fourth gear (91) is installed at a power output end of the rotating speed reducer (9), the fourth gear (91) is meshed with the teeth of the rotating unit driven fluted disc (10), and spiral bevel gears are arranged on the right side of the rotating unit driven fluted disc (10) and are clamped with the spiral bevel gears arranged on the right side of the rotating unit (142).

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