阅读说明：本技术 一种钢管内壁焊道瘤下线刮除装置 (Steel pipe inner wall welding bead off-line scraping device ) 是由 赵霄杨 周文礼 宋敏 车中进 甄芳 于 2019-10-30 设计创作，主要内容包括：一种钢管内壁焊道瘤下线刮除装置,包括机架、电机、传动机构、钢管固定机构、导向机构和刮疤刀杆,传动机构设有丝杠副,丝杠副、第一刀杆托架、导向机构、钢管固定机构、第二刀杆托架依次设置在机架上部,电机设置在机架一端的下部,电机经传动机构带动拉杆、拉杆带动刮疤刀杆直线运动,刮疤刀杆探入待加工钢管的内孔,刮疤导杆上设有刮疤刀,随刮疤刀杆的运动,刮疤刀切除钢管内壁的焊道瘤。本发明可以高效率对钢管内壁焊道瘤进行下线刮,成功解决了钢管产品内壁线下刮疤的难题,可避免因钢管内壁焊道瘤而产生的废品,降低了生产成本。(The utility model provides a steel pipe inner wall welding bead tumour scraping device that rolls off production line, which comprises a frame, including a motor, an end cap, a controller, and a cover plate, drive mechanism, steel pipe fixed establishment, guiding mechanism and scar cutter arbor, drive mechanism is equipped with the lead screw pair, the lead screw is vice, first cutter arbor bracket, guiding mechanism, steel pipe fixed establishment, second cutter arbor bracket sets gradually on frame upper portion, the motor sets up the lower part in frame one end, the motor drives the pull rod through drive mechanism, the pull rod drives the cutter arbor linear motion that scars, the cutter arbor that scars probes into the hole of waiting to process the steel pipe, be equipped with the sword that scars on the guide arm that scars, along with the motion of the cutter arbor that scars, the. The invention can efficiently scrape the weld bead on the inner wall of the steel pipe off line, successfully solves the problem of scraping scars on the inner wall of a steel pipe product, can avoid waste products caused by the weld bead on the inner wall of the steel pipe, and reduces the production cost.)

1. The utility model provides a steel pipe inner wall welding bead rimmed off-line scraping device which characterized in that: the steel tube scarification device comprises a rack (1), a motor (2), a transmission mechanism, a steel tube fixing mechanism (9), a guide mechanism (8) and a scarification cutter rod (13), wherein the transmission mechanism is provided with a screw pair, the screw pair, a first cutter rod bracket (7), the guide mechanism, the steel tube fixing mechanism and a second cutter rod bracket (17) are sequentially arranged on the upper portion of the rack, the motor is arranged on the lower portion of one end of the rack, the motor drives a pull rod (12) through the transmission mechanism and drives the scarification cutter rod to move linearly, the scarification cutter rod stretches into an inner hole of a steel tube (16) to be processed, and a scarification cutter (13-3) is arranged on the scarification guide rod and cuts out weld bead tumors on the inner wall of the steel tube.

2. The steel pipe inner wall bead offline scraping device as set forth in claim 1, wherein: the scab scraping cutter rod is provided with a cutter rod body (13-10), upper supporting wheels (13-1) and a tensioning mechanism, a pull rod shaft (13-4) connected with a pull rod is arranged at the rear end of the cutter rod body, the longitudinal section of the front end of the cutter rod body is wedge-shaped, the number of the upper supporting wheels capable of freely rotating is two, the two upper supporting wheels are respectively assembled at the front side and the rear side of the cutter rod body, the two upper supporting wheels extend out of the upper part of the cutter rod body, and each upper supporting wheel is provided with an annular groove; the middle part of the cutter bar body is provided with a mounting groove for assembling a tensioning mechanism, the tensioning mechanism comprises two tensioning rods (13-6) and two tensioning springs (13-8) which are symmetrically arranged by wheels, the far ends of the two tensioning rods are respectively provided with a tensioning wheel (13-5), the near ends of the two tensioning rods are hinged with the cutter bar body by a pin shaft, the middle part of each tensioning rod is connected with one end of each tensioning spring, the other end of each tensioning spring is connected with the cutter bar body, and the two tensioning wheels extend out from the lower part of the cutter bar body; the front part of the cutter bar body is provided with a scar scraping cutter shaft (13-9), the annular scar scraping cutter (13-3) is arranged on the scar scraping cutter shaft, a fixing screw (13-2) is arranged beside the scar scraping cutter shaft, and the fixing screw is pressed on the lower side of the scar scraping cutter.

3. The steel pipe inner wall bead offline scraping device as set forth in claim 2, wherein: the scab scraping cutter shaft is axially and obliquely arranged relative to the cutter bar body, the inclination angle B1 ranges from 25 degrees to 35 degrees, the diameter of the cutting edge of the scab scraping cutter is matched with the inner diameter of a processed steel pipe, and the inclination angle B2 of the cutting edge surface of the scab scraping cutter relative to the inner wall of the steel pipe ranges from 15 degrees to 25 degrees.

4. The steel pipe inner wall bead offline scraping device as set forth in claim 3, wherein: the tensioning mechanism is further provided with two adjusting jackscrews (13-7), each adjusting jackscrew is in screw connection with the cutter bar body, and the end part of each adjusting jackscrew respectively touches and presses each tensioning rod.

5. The steel pipe inner wall bead offline scraping device as set forth in claim 4, wherein: a working table top (11) is fixed on the upper portion of the rack, an adjusting table top (10) is arranged on the upper portion of the working table top, steel pipe fixing mechanisms are installed on the adjusting table top and are provided with two sets, each steel pipe fixing mechanism comprises a steel pipe support (9-2) and a quick pressing clamp (9-1), a V-shaped groove is formed in each steel pipe support, the lower portion of each steel pipe support is connected with a supporting frame (15), the upper portion of each supporting frame penetrates through the fixing table top, and the top of each supporting frame is connected with the.

6. The steel pipe inner wall bead offline scraping device as set forth in claim 5, wherein: the transmission mechanism is provided with a belt transmission (3), the belt transmission transmits motor power to a lead screw (4) of a lead screw pair, a screw nut (5) of the lead screw pair is in threaded connection with the lead screw, a sliding block is fixed at the bottom of the screw nut, the sliding block is in sliding fit with a sliding rail (14) fixed on the rack, and the screw nut is connected with a pull rod.

7. The steel pipe inner wall bead offline scraping device as set forth in claim 6, wherein: the guide mechanism (8) is provided with a guide seat (8-2), a guide sleeve (8-1), a guide sliding block (8-3) and a guide sliding block adjusting screw (8-4), the guide seat is installed on the fixed table top, the guide sliding block is located in the guide seat, the guide sliding block can slide up and down relative to the guide seat, the guide sleeve is installed in the guide sliding block, the bottom of the guide sliding block adjusting screw is connected with the guide sliding block, the middle of the guide sliding block adjusting screw is in threaded fit with a top plate of the guide seat, and an adjusting handle (8-5) is arranged on the upper portion of the guide sliding block.

8. The steel pipe inner wall bead offline scraping device as set forth in claim 7, wherein: the supporting frame is provided with a fixing block (15-1) and a height-adjusting screw rod (15-2), the fixing block is connected with the working table surface, two sides of the fixing block are in sliding fit with the supporting frame, the upper end of the height-adjusting screw rod is connected with a height-adjusting sliding block, the middle part of the height-adjusting screw rod is in threaded fit with a bottom plate of the supporting frame, and the bottom of the height-adjusting screw rod is provided with a height-adjusting handle (15-3).

9. The steel pipe inner wall bead offline scraping device as set forth in claim 8, wherein: one set of the two sets of steel pipe fixing mechanisms close to the guide seat is fixed, the other set of the two sets of steel pipe fixing mechanisms is adjustable, a bolt sliding groove (10-1) is arranged on the adjusting table surface, and a bolt penetrates through the bolt sliding groove to fix the steel pipe support of the steel pipe fixing mechanism with the adjustable position.

10. The steel pipe inner wall bead offline scraping device as set forth in claim 9, wherein: the lead screw and pull rod combined machine is characterized by further comprising a lead screw and pull rod support frame (6), wherein the lead screw and pull rod support frame is fixed on the upper portion of the machine frame, and the lead screw and pull rod support frame supports a pull rod and a lead screw up and down respectively.

Technical Field

The invention relates to a steel pipe processing device, in particular to a steel pipe inner wall weld bead off-line scraping device.

Background

A pipe product for automobiles has a diameter of 45-90mm and a length of 500-1200 mm. The main processing procedure is to shape the steel strip on the equipment and then butt weld by high frequency heating. After welding, weld bead humps (commonly called as craters) higher than the inner surface and the outer surface of the steel pipe are formed at the weld bead positions, and in order to ensure the quality of the steel pipe, the weld bead humps on the weld beads on the inner surface and the outer surface of the steel pipe need to be scraped and hung according to the curvatures of the inner surface and the outer surface of the steel pipe. At present, high-frequency welded pipe production lines are all provided with on-line steel pipe inner and outer surface scar scraping devices, and scars are scraped off before steel pipe shaping, so that on-line smooth shaping after welding is guaranteed, and qualified steel pipe products are produced. However, in the production process, each part of the equipment is comprehensively debugged or affected by some individual reasons, so that unqualified products caused by unqualified scars are difficult to avoid, and the unqualified products are difficult to repair once leaving the high-frequency welded pipe production line (steel pipe offline). The 'scar scraping' of the welding bead on the outer surface of the steel pipe is unqualified, the steel pipe can be manually repaired by using a common tool, if the 'scar scraping' of the welding bead on the inner surface of the steel pipe is unqualified, the steel pipe cannot be repaired by using the common tool and can only be scrapped, and the production cost is improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a steel pipe inner wall weld bead offline scraping device for efficiently removing the inner surface craters of the offline steel pipe.

The problem of the invention is realized by the following technical scheme:

the utility model provides a steel pipe inner wall welding bead tumour scraping device that rolls off production line, which comprises a frame, including a motor, an end cap, a controller, and a cover plate, drive mechanism, steel pipe fixed establishment, guiding mechanism and scar cutter arbor, drive mechanism is equipped with the lead screw pair, the lead screw is vice, first cutter arbor bracket, guiding mechanism, steel pipe fixed establishment, second cutter arbor bracket sets gradually on frame upper portion, the motor sets up the lower part in frame one end, the motor drives the pull rod through drive mechanism, the pull rod drives the cutter arbor linear motion that scars, the cutter arbor that scars probes into the hole of waiting to process the steel pipe, be equipped with the sword that scars on the guide arm that scars, along with the motion of the cutter arbor that scars, the.

According to the steel pipe inner wall weld bead offline scraping device, the scar scraping cutter rod is provided with a cutter rod body, two upper supporting wheels and a tensioning mechanism, a pull rod shaft connected with a pull rod is arranged at the rear end of the cutter rod body, the longitudinal section of the front end of the cutter rod body is wedge-shaped, the number of the upper supporting wheels capable of freely rotating is two, the two upper supporting wheels are respectively assembled on the front side and the rear side of the cutter rod body, the two upper supporting wheels extend out of the upper part of the cutter rod body, and each upper supporting wheel is provided with an annular groove; the middle part of the cutter bar body is provided with a mounting groove for assembling a tensioning mechanism, the tensioning mechanism comprises two tensioning rods and two tensioning springs which are symmetrically arranged by wheels, the far ends of the two tensioning rods are respectively provided with a tensioning wheel, the near ends of the two tensioning rods are hinged with the cutter bar body by a pin shaft, the middle part of each tensioning rod is connected with one end of each tensioning spring, the other end of each tensioning spring is connected with the cutter bar body, and the two tensioning wheels extend out from the lower part of the cutter bar body; the front part of the cutter bar body is provided with a scar scraping cutter shaft, the annular scar scraping cutter is arranged on the scar scraping cutter shaft, a fixing screw is arranged beside the scar scraping cutter shaft, and the fixing screw is pressed on the lower side of the scar scraping cutter.

According to the steel pipe inner wall weld bead off-line scraping device, the scab scraping cutter shaft is axially and obliquely arranged relative to the cutter bar body, the inclination angle B1 is 25-35 degrees, the diameter of the cutting edge of the scab scraping cutter is matched with the inner diameter of a processed steel pipe, and the inclination angle B2 of the cutting edge surface of the scab scraping cutter relative to the inner wall of the steel pipe is 15-25 degrees.

Above-mentioned steel pipe inner wall welding bead rimmed off-line scraping device, straining device still is equipped with two adjustment jackscrews, and each adjustment jackscrew and cutter arbor body screwed connection, each adjustment jackscrew tip touches respectively presses each tensioning rod.

According to the steel pipe inner wall welding bead off-line scraping device, the working table is fixed on the upper portion of the rack, the adjusting table is arranged on the upper portion of the working table, the steel pipe fixing mechanisms are installed on the adjusting table, the steel pipe fixing mechanisms are provided with two sets, each steel pipe fixing mechanism comprises a steel pipe support and a quick pressing clamp, a V-shaped groove is formed in each steel pipe support, the lower portion of each steel pipe support is connected with the supporting frame, the upper portion of each supporting frame penetrates through the fixing table, and the top of.

Above-mentioned steel pipe inner wall welding bead scraping device that rolls off production line, drive mechanism is equipped with belt drive, and belt drive conveys motor power to the vice lead screw of lead screw, the vice screw threaded connection lead screw of lead screw, the fixed slider in screw bottom, slider and the slide rail sliding fit who fixes in the frame, screw connection pull rod.

Above-mentioned steel pipe inner wall welding bead rimmed off-line scraping device, guiding mechanism is equipped with guide holder, uide bushing, direction slider and direction slider adjusting screw, and the guide holder is installed on fixed table surface, and the direction slider is located the guide holder, and the direction slider can slide from top to bottom relative to the guide holder, and the uide bushing is installed in the direction slider, and direction slider adjusting screw connects the direction slider bottom, and direction slider adjusting screw middle part and guide holder roof screw-thread fit are equipped with adjustment handle on direction slider adjusting screw upper portion.

Above-mentioned steel pipe inner wall welding bead scraping device that rolls off production line, braced frame are equipped with the fixed block and heighten the screw rod, and the fixed block is connected with table surface, fixed block both sides and braced frame sliding fit, heighten the screw rod upper end and connect and heighten the slider, heighten screw rod middle part and braced frame bottom plate screw-thread fit, heighten the screw rod bottom and be equipped with height adjustment handle.

According to the steel pipe inner wall weld bead off-line scraping device, one set of the two sets of steel pipe fixing mechanisms close to the guide seat is fixed in position, the other set of the two sets of steel pipe fixing mechanisms is adjustable in position, the adjusting table surface is provided with the bolt sliding groove, and the bolt penetrates through the bolt sliding groove to fix the steel pipe support of the steel pipe fixing mechanism with the adjustable position.

The steel pipe inner wall weld bead offline scraping device further comprises a lead screw pull rod support frame, the lead screw pull rod support frame is fixed to the upper portion of the rack, and the lead screw pull rod support frame supports a pull rod and a lead screw up and down respectively.

The device is driven by a motor, the belt, the screw rod pair and the pull rod drive the scar scraping cutter rod to extend into the steel pipe to perform linear motion, the scar scraping cutter rod is provided with an annular cutter head, and the annular cutter head performs scraping repair on a scar scraping position in an inner hole of the steel pipe until the product requirements are met. The invention has the following main characteristics: 1. the scraping requirements of pipe products with various specifications can be met by replacing the scraper rod; 2. the primary transmission of the device adopts belt transmission, so that the scar scraping cutter bar can be protected from being damaged, and the secondary transmission adopts the combination of a screw pair and a linear guide rail, so that the cutter bar is uniform and stable in speed and small in tension change in the scar scraping process, the vibration of a scar scraping tool can be controlled, and the service life of the scar scraping cutter is greatly prolonged; 3. the scar scraping cutter rod and the pull rod are connected by the hook, so that the cutter rod and the cutter rod are conveniently and quickly hung and dismantled, and the production efficiency can be improved; 4. the scar scraping cutter bar adopts an upper tensioning wheel structure and a tensioning wheel structure, so that the stable scar scraping process is ensured, the height and the size of a scar are easy to control, and the scar scraping quality is greatly improved; 5. the arrangement of the adjusting table top can meet the requirements of processing steel pipes with different diameters. In conclusion, the device successfully solves the problem of scratching the inner wall line of the steel pipe product, can avoid waste products caused by welding bead tumors on the inner wall of the steel pipe, and reduces the production cost.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the scab bar;

FIG. 3 is a cross-sectional view of a scaring bar;

FIG. 4 is a perspective view of the motor and transmission;

FIG. 5 is a perspective view of the guide mechanism and the steel pipe fixing mechanism;

fig. 6 is a schematic structural view of the steel pipe fixing mechanism and the support frame.

The reference numbers in the figures are: 1. a frame, 2, a motor, 3, a belt transmission, 4, a screw rod, 5, a nut, 6, a screw rod pull rod support frame, 7, a first cutter rod bracket, 8, a guide mechanism, 8-1, a guide sleeve, 8-2, a guide seat, 8-3, a guide slide block, 8-4, a guide slide block adjusting screw rod, 8-5, an adjusting handle, 9, a steel pipe fixing mechanism, 9-1, a quick pressing clamp, 9-2, a steel pipe support, 10, an adjusting table top, 10-1, a bolt sliding groove, 11, a working table top, 12, a pull rod, 12-1, a hook, 13, a scar cutter rod, 13-1, an upper support wheel, 13-2, a fixing screw, 13-3, a scar scraping knife, 13-4, a pull rod shaft, 13-5, a tension wheel, 13-6, a tension rod, 13-7 and an adjusting jackscrew, 13-8 parts of spring, 13-9 parts of scab scraping cutter shaft, 13-10 parts of cutter bar body, 14 parts of slide rail, 15 parts of support frame, 15-1 parts of fixing block, 15-2 parts of height adjusting screw rod, 15-3 parts of height adjusting handle, 16 parts of steel pipe, 17 parts of second cutter bar bracket.

Detailed Description

Referring to fig. 1 and 4, the invention comprises a frame 1, a motor 2, a transmission mechanism, a steel tube fixing mechanism 9, a guide mechanism 8, a pull rod 12 and a scar scraping cutter rod 13. The transmission mechanism is provided with a belt transmission 3 and a lead screw pair transmission. The screw pair, the first cutter bar bracket 7, the guide mechanism, the steel pipe fixing mechanism and the second cutter bar bracket 17 are sequentially arranged on the upper part of the machine frame from left to right. The belt transmission conveys the motor power to a lead screw 4 of a lead screw pair, a nut 5 of the lead screw pair is in threaded connection with the lead screw, a sliding block is fixed at the bottom of the nut, the sliding block is in sliding fit with a sliding rail 14 fixed on a rack, and the nut is connected with a pull rod. The motor drives the pull rod 12 to move linearly through the transmission mechanism, the hook 12-1 arranged at the front end of the pull rod is connected with and drives the scar cutter rod 13 to move linearly, the scar cutter rod extends into an inner hole of a steel pipe 16 to be processed, the scar cutter 13-3 is arranged on the scar guide rod, and the scar cutter cuts off weld beads on the inner wall of the steel pipe along with the linear movement of the scar cutter rod. The lead screw both ends are supported by the support frame, and wherein, lead screw right-hand member support frame draws 6 for lead screw pull rod support frame, and lead screw pull rod support frame is fixed on frame upper portion, and lead screw right-hand member and pull rod left end are supported respectively to lead screw pull rod support frame from top to bottom to when avoiding the screw to remove the right-hand member, because gravity causes the pull rod bending to hang down.

Referring to fig. 2 and 3, the scab scraping knife bar for mounting the scab scraping knife is provided with a knife bar body 13-10, an upper supporting wheel 13-1 and a tensioning mechanism. The rear end of the cutter bar body is provided with a pull rod shaft 13-4 connected with a pull rod hook. The longitudinal section of the front end of the cutter bar body is wedge-shaped so as to be convenient for entering a steel pipe. But free rotation's last supporting wheel sets up two, and two go up the supporting wheel and assemble respectively in the cutter arbor body front and back side, and two go up the supporting wheel and stretch out by the upper portion of cutter arbor body, touch the upper portion of steel pipe inner wall. The upper supporting wheel is provided with an annular groove, and the groove corresponds to the weld bead. The middle part of the cutter bar body is provided with a mounting groove for assembling a tensioning mechanism, the tensioning mechanism comprises two tensioning rods 13-6 and two tensioning springs 13-8 which are symmetrically arranged, the far ends of the two tensioning rods are respectively provided with a tensioning wheel 13-5, and the near ends of the two tensioning rods are hinged with the cutter bar body through a pin shaft. The middle part of each tensioning rod is connected with one end of a tensioning spring, the other end of the tensioning spring is connected with the cutter bar body, two tensioning wheels extend out from the lower part of the cutter bar body, and the tensioning wheels can freely rotate relative to the tensioning rods. And in the scar scraping process, the two tension wheels are pressed on the lower part of the inner wall of the steel pipe. In order to adapt to steel pipes with different diameters, the tensioning mechanism is further provided with two adjusting jackscrews 13-7, each adjusting jackscrew is in threaded connection with the cutter bar body, the end part of each adjusting jackscrew respectively touches and presses each tensioning rod, and the upper and lower positions of the tensioning wheel can be adjusted by rotating the jackscrews so as to ensure that the tensioning wheel has a certain tensioning force to touch and press the inner wall of the steel pipe. The front part of the cutter bar body is provided with a scar scraping cutter shaft 13-9, the annular scar scraping cutter 13-3 is arranged on the scar scraping cutter shaft, a fixing screw 13-2 is arranged beside the scar scraping cutter shaft, and the fixing screw is pressed on the lower side of the scar scraping cutter. The scab scraping cutter shaft is axially and obliquely arranged relative to the cutter bar body, the inclination angle B1 is 25-35 degrees, the diameter of the cutting edge of the scab scraping cutter is matched with the inner diameter of a processed steel pipe, and the inclination angle B2 of the cutting edge surface of the scab scraping cutter relative to the inner wall of the steel pipe is 15-25 degrees.

Referring to fig. 1, 5 and 6, a working table 11 is fixed on the upper part of the frame, and an adjusting table 10 is also arranged on the upper part of the working table. The steel pipe fixing mechanisms are arranged on the adjusting table board, and the two sets of the steel pipe fixing mechanisms are respectively used for fixing two positions of the steel pipe. Each steel pipe fixing mechanism comprises a steel pipe support 9-2 and a quick pressing clamp 9-1 (commercially available). The steel pipe support is provided with a V-shaped groove for supporting the steel pipe, and the steel pipe is placed on the V-shaped groove and then is pressed by the quick pressing clamp. The lower part of the steel pipe support is connected with a support frame 15, the upper part of the support frame penetrates through the fixed table top, and the top of the support frame is connected with an adjusting table top 10. The supporting frame is provided with a fixing block 15-1 and a height-adjusting screw rod 15-2, the fixing block is fixedly connected with the working table surface, two sides of the fixing block are in sliding fit with the supporting frame, the upper end of the height-adjusting screw rod is connected with a height-adjusting sliding block, the middle part of the height-adjusting screw rod is in threaded fit with a bottom plate of the supporting frame, and the bottom of the height-adjusting screw rod is provided with a height-adjusting handle 15-3. The supporting frame and the adjusting table top are arranged to adapt to steel pipes with different diameters, when the diameter of the processed steel pipe changes, the height adjusting handle is rotated, the supporting frame and the steel pipe fixing mechanism move up and down, and after the steel pipe is adjusted properly, the supporting frame is fixed in position by a jackscrew (not shown in the figure) arranged on the side portion of the rack. In addition, in order to adapt to the change of the length of the steel pipe, one set of the two sets of steel pipe fixing mechanisms close to the guide seat is fixed in position, and the other set of the two sets of steel pipe fixing mechanisms is adjustable in position. The adjusting table top is provided with a bolt sliding groove 10-1, and a bolt penetrates through the bolt sliding groove to fix the steel pipe support of the steel pipe fixing mechanism with the position adjustable.

Referring to fig. 1 and 5, the guide mechanism 8 is used for guiding the movement of the cutter bar to ensure the complete scar removal of the left end of the steel pipe. The guide mechanism is provided with a guide seat 8-2, a guide sleeve 8-1, a guide slide block 8-3 and a guide slide block adjusting screw 8-4, the guide seat is installed on the fixed table board, the guide slide block is located in the guide seat, the guide slide block can slide up and down relative to the guide seat, the guide sleeve is installed in the guide slide block, the bottom of the guide slide block adjusting screw is connected with the guide slide block, the middle part of the guide slide block adjusting screw is in threaded fit with the top plate of the guide seat, and the upper part of the guide slide block adjusting screw is provided with an adjusting handle. When steel pipes with different specifications are processed, the adjusting handle is rotated to adjust the upper and lower positions of the guide sleeve, so that the guide sleeve corresponds to the position of the steel pipe.

When the device works, a steel pipe is firstly placed into the V-shaped grooves of the two steel pipe fixing mechanisms, the left end of the steel pipe abuts against the right end face of the guide sleeve, the purpose of axial positioning is achieved, a weld in the steel pipe needs to be positioned above the weld, and the steel pipe is tightly pressed by the quick pressing clamp; the motor rotates, the screw nut is driven by the transmission mechanism, the screw nut drives the pull rod to move right until the pull rod extends out of the right end of the steel pipe, and the motor stops; the pull rod and the scar scraping cutter rod are connected, the motor rotates reversely, the nut is driven by the transmission mechanism, the pull rod is driven by the nut to drive the scar scraping cutter rod to move left until the scar scraping cutter is completely moved out of the left end of the steel pipe, and the scar scraping operation of the scar scraping cutter on the weld bead on the inner wall of the steel pipe is realized in the process of moving the scar scraping cutter rod to the left; after the scab scraping is finished, the scab scraping cutter rod moves rightwards to reset, the pull rod is separated from the scab scraping cutter rod, the pull rod moves leftwards to the initial position, and one working cycle is finished.