阅读说明：本技术 一种坡口机 (Beveling machine ) 是由 项光明 项林华 于 2021-07-24 设计创作，主要内容包括：本申请涉及坡口机的技术领域,公开了一种坡口机,包括机座和安装于机座中心的支撑主轴,机座上设有驱动电机,支撑主轴一侧安装有跟踪刀架和刀具支撑座,跟踪刀架包括滑移连接于刀具支撑座的刀盘座、固定连接于刀盘座上的切削刀具和位于切削刀具内侧的跟踪滚轮,跟踪刀架与刀具支撑座之间设有弹性活动结构,弹性活动结构对刀盘座施加远离支撑主轴中心方向的力；即让动刀盘座具有朝远离支撑主轴中心方向移动的趋势,即使得刀盘座上的跟踪滚轮始终保持与钢管的内壁紧贴,因此不管钢管端面是否为圆形还是非圆形结构,都能使得切削刀具始终能够按照设定尺寸对管件进行切削。(The application relates to the technical field of beveling machines, and discloses a beveling machine which comprises a machine base and a supporting main shaft arranged at the center of the machine base, wherein a driving motor is arranged on the machine base, a tracking tool rest and a tool supporting seat are arranged on one side of the supporting main shaft, the tracking tool rest comprises a tool disc seat connected to the tool supporting seat in a sliding manner, a cutting tool fixedly connected to the tool disc seat and a tracking roller positioned on the inner side of the cutting tool, an elastic movable structure is arranged between the tracking tool rest and the tool supporting seat, and the elastic movable structure applies a force to the tool disc seat in a direction away from the center of the supporting main shaft; the movable cutter head seat has the trend of moving towards the direction away from the center of the supporting main shaft, namely, the tracking roller on the cutter head seat is always kept to be attached to the inner wall of the steel pipe, and therefore, the cutting tool can always cut the pipe fitting according to the set size no matter whether the end face of the steel pipe is in a circular or non-circular structure.)

1. The utility model provides a beveling machine, includes frame (1) and installs in support main shaft (2) at frame (1) center, its characterized in that: be equipped with driving motor (13) on frame (1), support main shaft (2) one side and install tracking knife rest (8) and cutter supporting seat (7), tracking knife rest (8) including slide connect in cutter head seat (81), the cutting tool (82) of fixed connection on cutter head seat (81) of cutter supporting seat (7) and be located tracking roller (83) of cutting tool (82) inboard, be equipped with elasticity activity structure (9) between tracking knife rest (8) and cutter supporting seat (7), elasticity activity structure (9) are exerted to cutter head seat (81) and are kept away from the power that supports main shaft (2) central direction.

2. The beveling machine of claim 1, wherein: elasticity activity structure (9) include pull rod (91) and compression spring (92), compression spring (92) cover is located on pull rod (91), cutter supporting seat (7) and fixed connection are passed on cutter head seat (81) to pull rod (91) one end, pull rod (91) other end is equipped with fixed block (911), the cover is equipped with gasket (912) on fixed block (911), the one end butt of compression spring (92) is in gasket (912), and the other end butt is on cutter supporting seat (7).

3. The beveling machine of claim 1, wherein: the cutter head seat (81) is positioned through a positioning structure (10).

4. The beveling machine of claim 3, wherein: the positioning structure (10) comprises an abutting screw rod (101) and a return spring (102), the abutting screw rod (101) is in threaded connection with the cutter supporting seat (7), the abutting screw rod (101) can abut against the cutter head seat (81), and the return spring (102) is sleeved on the abutting screw rod (101) and abuts against the cutter supporting seat (7).

5. The beveling machine of claim 1, wherein: the cutter supporting seat (7) is pushed by a pushing mechanism (3), an installation seat (12) is fixed on the machine base (1), and the pushing mechanism (3) is installed in the installation seat (12); advancing mechanism (3) include worm wheel (31), worm (32) and profile of tooth sleeve pipe (33), profile of tooth sleeve pipe (33) integrated into one piece is on supporting main shaft (2), profile of tooth sleeve pipe (33) and with profile of tooth sleeve pipe (33) cooperation are located in worm wheel (31) cover, worm (32) and worm wheel (31) meshing, when profile of tooth sleeve pipe (33) location, worm wheel (31) rotate, mount pad (12) are along profile of tooth sleeve pipe (33) horizontal migration.

6. The beveling machine of claim 5, wherein: both ends of worm (32) wear to locate outside mount pad (12) respectively, just the one end of worm (32) is fixed with hand rocking wheel (321), and the other end is connected with servo motor (322).

7. The beveling machine of claim 1, wherein: and a supporting mechanism (4) which is abutted against the inner wall of the pipeline is arranged at the end part of the supporting main shaft (2).

8. The beveling machine of claim 7, wherein: the supporting mechanism (4) comprises an expansion claw inclined block (41) and a tension block (42), an upper tension disc (22) and a lower tension disc (23) are fixed on the supporting main shaft (2), the expansion claw inclined blocks (41) are arranged between the upper tension disc (22) and the lower tension disc (23) at intervals, and the expansion claw inclined blocks (41) are positioned through elastic ferrules; the tensioning block (42) is arranged on the tensioning claw inclined block (41), and the tensioning block (42) can be overlapped and abutted against the inner wall of the steel pipe.

9. The beveling machine of claim 8, wherein: the lower tensioning disc (23) is disc-shaped; mounting grooves (231) are formed in the lower tensioning disc (23) at intervals, reducing blocks (412) are formed on the expansion claw inclined blocks (41), and the reducing blocks (412) are clamped in the mounting grooves (231); a matching groove (222) for accommodating and sliding the expansion claw sloping block (41) is formed in the side wall of the upper expansion disc (22) and corresponds to the expansion claw sloping block (41); an inclined surface (221) which is retracted towards the lower tensioning disc (23) is formed on the circumferential side wall of the upper tensioning disc (22) close to the lower tensioning disc (23), and a chamfer surface (411) matched with the inclined surface (221) is formed on the inner side wall of the expansion claw inclined block (41) close to the upper tensioning block (42).

10. The beveling machine of claim 1, wherein: a main shaft sleeve (5) driven by a driving motor (13) to rotate is sleeved on the supporting main shaft (2), a tool rest bottom plate (6) is fixed on the main shaft sleeve (5), and the tool supporting seat (7) is installed on the tool rest bottom plate (6); mounting holes (61) are formed in the side wall of the tool rest bottom plate (6) at intervals, and the tool supporting seat (7) is arranged at different positions on the tool rest bottom plate (6) through the corresponding mounting holes (61) in a penetrating manner through bolts; a handle (11) is fixed on the machine base (1).

Technical Field

The application relates to the technical field of beveling machines, in particular to a beveling machine.

Background

The beveling machine is an apparatus for cutting the end face of a steel pipe, and generally, when a steel pipe is machined, the steel pipe is fixed on the beveling machine or the beveling machine is fixed on the steel pipe, and then the end face of the steel pipe is cut by making a circular rotation on the steel pipe through a beveling tool.

At present, patent publication No. CN102962521A discloses a pipe beveling machine, which includes: the hydraulic cutting feeding device and the hydraulic expansion device are respectively arranged at two ends of the supporting main shaft, and the driving device is meshed with the transmission gear through a power output gear; the driving device is fixed on the shell, and the shell is movably connected with the main shaft sleeve through a shell supporting main bearing; the fixing of the beveling machine and the pipeline and the feeding and retracting of the cutter head are realized by utilizing the hydraulic expansion device and the hydraulic cutting feeding device.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the station for cutting by the beveling machine is fixed at present, only a standard circular bevel can be finished, and when the wall thickness of a steel pipe is different or the end face of the steel pipe is non-circular due to deformation, the existing beveling machine is difficult to achieve a good bevel cutting effect, so that the improvement is still needed.

Disclosure of Invention

In order to meet the requirement that the beveling machine can perform bevel cutting on a steel pipe with a non-circular end face, the application provides the beveling machine.

The application provides a beveling machine adopts following technical scheme:

the utility model provides a beveling machine, includes the frame and installs in the support main shaft at frame center, is equipped with driving motor on the frame, supports main shaft one side and installs tracking knife rest and cutter supporting seat, and tracking knife rest is equipped with the elasticity movable structure including sliding the tracking gyro wheel that connects in the cutter head seat of cutter supporting seat, fixed connection cutting tool on the cutter head seat and be located the cutting tool inboard between tracking knife rest and the cutter supporting seat, and the elasticity movable structure exerts the power of keeping away from support main shaft central direction to the cutter head seat.

Through adopting above-mentioned technical scheme, when carrying out the groove operation to the steel pipe, the pipe wall of steel pipe is placed between cutting tool and tracking roller, tracking roller is located the pipe fitting inboard, the elastic movement structure exerts the power of keeping away from support main shaft central direction to the cutter head seat, let the cutter head seat have towards keeping away from the trend that supports main shaft central direction and remove, even make the tracking roller on the cutter head seat keep hugging closely with the inner wall of steel pipe all the time, cutting tool and tracking roller all fix on the cutter head seat again, consequently whether the steel pipe terminal surface is circular or non-circular structure, can both make cutting tool cut the pipe fitting according to setting for the size all the time, satisfied the requirement that the terminal surface carries out the groove for circular or non-circular pipe fitting.

Further: the elastic movable structure comprises a pull rod and a compression spring, the compression spring is sleeved on the pull rod, one end of the pull rod penetrates through the cutter supporting seat and is fixedly connected to the cutter head seat, the other end of the pull rod is provided with a fixed block, a gasket is sleeved on the fixed block, one end of the compression spring is abutted to the gasket, and the other end of the compression spring is abutted to the cutter supporting seat.

By adopting the technical scheme, the compression spring is sleeved on the pull rod, and two ends of the compression spring are respectively abutted to the gasket and the cutter supporting seat, so that the pull rod has an acting force in the direction away from the center of the supporting spindle, the movable cutter disc seat has a trend of moving towards the direction away from the center of the supporting spindle, and the tracking roller on the cutter disc seat is driven to be always abutted to the inner wall of the steel pipe.

Further: the cutter head seat is positioned through a positioning structure.

By adopting the technical scheme, when the beveling machine and the steel pipe are relatively positioned, the cutter head seat is positioned by the positioning structure, so that the problem that the height of the tracking roller obstructs the installation of the steel pipe is solved, and the tracking roller can be always positioned on the inner wall of the steel pipe.

Further: the positioning structure comprises a butt screw rod and a return spring, the butt screw rod is in threaded connection with the cutter supporting seat and can be abutted against the cutter head seat, and the return spring is sleeved on the butt screw rod and abutted against the cutter supporting seat.

By adopting the technical scheme, the cutter head seat is abutted and pushed to descend by screwing in the abutting screw which is in threaded connection with the cutter supporting seat, and the cutter head seat moves towards the direction of the supporting main shaft, so that the tracking roller cannot abut against the inner wall of the steel pipe under the action of the compression spring; after the steel pipe is fixedly arranged between the cutting tool and the tracking roller, the abutting screw is screwed out, and the tracking roller abuts against the inner wall of the steel pipe again under the action of the compression spring; reset spring can prevent that the butt screw rod from moving down the butt to the cutter head seat because of the vibration, avoids interfering the tracking roller butt on the steel pipe inner wall.

Further: the cutter supporting seat is pushed by a pushing mechanism, a mounting seat is fixed on the machine seat, and the pushing mechanism is mounted in the mounting seat; the pushing mechanism comprises a worm wheel, a worm and a toothed sleeve, the toothed sleeve is integrally formed on the supporting main shaft, the worm wheel is sleeved on the toothed sleeve and matched with the toothed sleeve, the worm is meshed with the worm wheel, when the toothed sleeve is positioned, the worm wheel rotates, and the mounting seat horizontally moves along the toothed sleeve.

By adopting the technical scheme, when the worm rotates to drive the worm wheel to rotate, the mounting seat is driven to horizontally slide through the matching of the tooth-shaped sleeve and the worm wheel, so that the cutter supporting seat can be pushed or withdrawn relative to the steel pipe, and the cutting tool can feed and cut the pipe fitting to be beveled.

Further: the both ends of worm wear to locate outside the mount pad respectively, just the one end of worm is fixed with hand round, and the other end is connected with servo motor.

Through adopting above-mentioned technical scheme, the tip of worm wears to locate outside the mount pad, makes two tip of worm can install hand rocking wheel and servo motor respectively to both can be automatic but manual control feed rate, realize automatic processing.

Further: and a supporting mechanism which is abutted against the inner wall of the pipeline is arranged at the end part of the supporting main shaft.

By adopting the technical scheme, the support mechanism enables the beveling machine to be positioned relatively stably with the steel pipe to be cut.

Further: the supporting mechanism comprises an expansion claw inclined block and a tension block, an upper tension disc and a lower tension disc are arranged on the supporting main shaft, the expansion claw inclined block is arranged between the upper tension disc and the lower tension disc at intervals, and the expansion claw inclined block is positioned by an elastic ferrule; the tensioning block is arranged on the tensioning claw inclined block and can be overlapped and abutted against the inner wall of the steel pipe.

By adopting the technical scheme, the upper tensioning disc and the lower tensioning disc support the expansion claw inclined blocks, and the elastic ferrule further positions the interval expansion claw inclined blocks; the tensioning block is supported by the tensioning claw inclined block, so that the tensioning block is abutted against the inner wall of the steel pipe to position the beveling machine.

Further: the lower tensioning disc is disc-shaped; mounting grooves are formed in the lower tensioning disc at intervals, reducing blocks are formed on the expansion claw inclined blocks, and the reducing blocks are clamped in the mounting grooves; a matching groove for accommodating and sliding the expansion claw sloping block is formed in the side wall of the upper expansion disc and corresponds to the expansion claw sloping block; an inclined surface which is retracted towards the lower tensioning disc is formed on the circumferential side wall of the upper tensioning disc close to the lower tensioning disc, and a chamfer surface matched with the inclined surface is formed on the inner side wall of the tensioning claw inclined block close to the upper tensioning block.

By adopting the technical scheme, the disc-shaped lower tensioning disc provides a larger mounting area for the expansion claw inclined block; the expansion claw inclined block can be arranged on the lower expansion disc and can move through the matching of the reducing block and the mounting groove; when the lower tensioning disc moves towards the direction close to the upper tensioning disc, the expansion claw inclined block can be outwards expanded under the guidance of the inclined surface, so that the tensioning block abuts against the inner wall of the steel pipe; and the inclined plane enables the moving process of the expansion claw inclined block relative to the lower expansion disc to be easier to carry out.

Further: the supporting main shaft is sleeved with a main shaft sleeve which is driven by a driving motor to rotate, a tool rest bottom plate is fixed on the main shaft sleeve, and the tool supporting seat is installed on the tool rest bottom plate; mounting holes are formed in the side wall of the tool rest base plate at intervals, and the tool supporting seat is arranged at different positions on the tool rest base plate through the mounting holes in the corresponding positions in a penetrating mode through bolts; a handle is fixed on the machine base.

By adopting the technical scheme, the cutter supporting seat can be arranged at different heights through the mounting hole on the bottom plate of the cutter rest, so that the cutter supporting seat is suitable for cutting end faces of pipelines with different diameters; the purpose of moving the beveling machine can be achieved by holding the handle by a hand.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the elastic movable structure applies force far away from the center direction of the supporting spindle to the cutter head seat, the movable cutter head seat has the trend of moving towards the direction far away from the center direction of the supporting spindle, namely the tracking roller on the cutter head seat is always kept to be attached to the inner wall of the steel pipe, the cutting tool and the tracking roller are fixed on the cutter head seat, therefore, whether the end face of the steel pipe is in a circular or non-circular structure, the cutting tool can be enabled to cut the pipe fitting according to the set size all the time, namely, the left edge behind the groove of the end face of the steel pipe can be equidistant, and the requirement of performing the groove on the circular or non-circular pipe fitting on the end face is met.

2. The end part of the worm penetrates through the mounting seat, so that the hand-operated wheel and the servo motor can be respectively mounted on the two end parts of the worm, the feeding speed can be manually and automatically controlled, the integration of manual processing and automatic processing is realized, and particularly, the processing precision and the processing efficiency are greatly improved through the automatic processing mode of the private servo motor.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a schematic view, partially in section, of a worm gear and worm mating of an embodiment of the present application;

FIG. 3 is a schematic view of a partial explosion structure highlighting the cooperative connection of the upper tensioning disc, the tensioning claw sloping block, the tensioning block and the lower tensioning disc of the embodiment of the present application;

fig. 4 is a schematic view of a partially exploded structure highlighting the drawbar, the cutter head mount and the tracking roller of the embodiment of the present application.

Description of reference numerals: 1. a machine base; 11. a handle; 12. a mounting seat; 13. a drive motor; 2. supporting the main shaft; 22. an upper tensioning disc; 221. an inclined surface; 222. a mating groove; 23. a lower tensioning disc; 231. mounting grooves; 3. a propulsion mechanism; 31. a worm gear; 32. a worm; 321. a hand-operated wheel; 322. a servo motor; 33. a toothed sleeve; 4. a support mechanism; 41. an expansion claw inclined block; 411. a chamfer plane; 412. reducing the diameter of the block; 42. a tensioning block; 5. a main shaft sleeve; 6. a tool holder base plate; 61. mounting holes; 7. a cutter supporting seat; 8. tracking the tool holder; 81. a cutter head seat; 82. a cutting tool; 83. tracking the roller; 9. an elastic movable structure; 91. a pull rod; 911. a fixed block; 912. a gasket; 92. a compression spring; 10. a positioning structure; 101. abutting against the screw; 102. a return spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a beveling machine. Referring to fig. 1, the beveling machine comprises a base 1 and a supporting spindle 2 installed at the center of the base 1, wherein a driving motor 13 is arranged on the base 1, a handle 11 is fixed on the base 1, and the beveling machine can be conveniently moved by holding the handle 11 by hands.

Referring to fig. 1, a main shaft sleeve 5 is sleeved on a supporting main shaft 2, the main shaft sleeve 5 is rotatably connected with the supporting main shaft 2, a tool rest bottom plate 6 is fixed on the side wall of the main shaft sleeve 5 far away from a mounting seat 12, and a tool supporting seat 7 is installed on the tool rest bottom plate 6.

Referring to fig. 1 and 2, the tool supporting seat 7 is pushed by the pushing mechanism 3, the other side of the machine base 1, which is located on the spindle sleeve 5, is fixed with the mounting seat 12 of the pushing mechanism 3, the pushing mechanism 3 includes a worm wheel 31, a worm 32 and a tooth-shaped sleeve 33, the tooth-shaped sleeve 33 is integrally formed on the supporting spindle 2, the worm wheel 31 is located in the mounting seat 12 and sleeved on the tooth-shaped sleeve 33, the worm wheel 31 is matched with the tooth-shaped sleeve 33, the worm 32 is located in the mounting seat 12, the worm 32 is located above the worm wheel 31 and meshed with the worm wheel 31, the rotation of the worm wheel 31 is driven by the rotation of the worm 32, after the beveling machine and the steel pipe are relatively positioned, the tool supporting seat 7 can slowly feed along the axial direction of the supporting spindle 2 along with the rotation of the worm wheel 31, that is to make the cutting tool 82 feed and cut the pipe fitting to be beveled. Both ends of worm 32 wear to locate outside mount pad 12 respectively, just the one end of worm 32 is fixed with hand wheel 321, and the other end is connected with servo motor 322 to not only can be manual but also the rotation of automatic control drive worm 32, especially servo motor 322's scheme, it can realize the feed rate of automatic control cutting tool 82, must this beveling machine realize the automatic feed cutting operation, and can also set for the appointed parameter and carry out the automatic cutting to the steel pipe, reach automatic shutdown after the appointed degree of depth, accomplish groove machining, machining precision and machining efficiency have been improved greatly.

Referring to fig. 1 and 3, a supporting mechanism 4 abutted against the inner wall of the pipe is arranged at one end of the supporting spindle 2 away from the mounting seat 12, and the supporting mechanism 4 enables the beveling machine to be positioned relatively stably with the steel pipe to be cut; the supporting mechanism 4 comprises an expansion claw inclined block 41, an upper expansion disc 22 and a lower expansion disc 23 are oppositely arranged on the supporting main shaft 2 along the length direction, the upper expansion disc 22 is fixed on the supporting main shaft 2, and the lower expansion disc 23 is disc-shaped and is sleeved and slidably connected on the supporting main shaft 2; the expansion claw sloping block 41 is arranged between the upper expansion disc 22 and the lower expansion disc 23.

Referring to fig. 1 and 3, a plurality of mounting grooves 231 are circumferentially spaced on the side wall of the lower tensioning disc 23, a plurality of expansion claw sloping blocks 41 are correspondingly mounted at the mounting grooves 231, a reducing block 412 is formed by reducing the diameter of the side wall of one end of each expansion claw sloping block 41 close to the lower tensioning disc 23, and the reducing block 412 is clamped in the mounting grooves 231; an elastic ferrule can be sleeved on the expansion claw inclined blocks 41 which are circumferentially arranged on the lower expansion disc 23, and the plurality of expansion claw inclined blocks 41 are inwardly tightened through the arrangement of the elastic ferrule to play a further positioning role; an inclined surface 221 which is retracted towards the lower tensioning disc 23 is formed on the circumferential side wall of the upper tensioning disc 22 close to the lower tensioning disc 23, a chamfered surface 411 matched with the inclined surface 221 is formed on the inner side wall of the tensioning claw inclined block 41 close to the upper tensioning block 42, and a matching groove 222 for accommodating and sliding the tensioning claw inclined block 41 is formed on the side wall of the upper tensioning disc 22 corresponding to the tensioning claw inclined block 41; the guide expansion claw sloping block 41 is close to the process of the rising block 42 and can make the expansion claw sloping block 41 flare.

Referring to fig. 3, the supporting mechanism 4 further includes a tension block 42, and the tension block 42 is inserted on the outer side wall of the expansion claw sloping block 41 and fixed by bolts; the tensioning blocks 42 can be overlapped along the longitudinal direction, so that the last tensioning block 42 is abutted against the inner side wall of the steel pipe, and the beveling machine is stably supported.

Referring to fig. 1 and 4, a tracking tool rest 8 is arranged on a tool supporting seat 7; a plurality of mounting holes 61 are longitudinally arranged on the side wall of the tool rest bottom plate 6 at intervals, and the tool supporting seat 7 can be arranged at different positions on the tool rest bottom plate 6 through the mounting holes 61 arranged at the corresponding positions in a penetrating manner by bolts, so that the position of the tracking tool rest 8 can be adjusted.

Referring to fig. 4, the tracking cutter holder 8 includes a cutter head seat 81 slidably connected to the cutter supporting seat 7, a cutting cutter 82 mounted on the cutter head seat 81, and a tracking roller 83, and the tracking roller 83 is located inside the cutting cutter 82, i.e. the tracking roller 83 is located between the cutting cutter 82 and the supporting spindle 2, and the cutting cutter 82 is fixed on the cutter head seat 81 by bolts and the mounting position can be adjusted; when the groove is required to be formed on the steel pipe, the position of the cutting tool 82 on the cutter head seat 81 can be adjusted according to the thickness of the pipe wall of the steel pipe and the size of the groove, namely the relative distance between the cutting tool 82 and the tracking roller 83 is fixed, and the tracking roller 83 is tightly attached to the inner side of the pipe wall of the steel pipe, so that the cutting tool 82 can cut the end face of the steel pipe according to the set size.

Referring to fig. 4, the cutter head seat 81 and the cutter supporting seat 7 are slidably connected, the sliding direction is the axial direction of the vertical supporting spindle 2, and an elastic movable structure 9 is arranged behind the cutter head seat 81 and the cutter supporting seat 7; the elastic movable structure 9 comprises a pull rod 91 and a compression spring 92, the compression spring 92 is sleeved on the pull rod 91, one end of the pull rod 91 penetrates through the cutter supporting seat 7 and is fixedly connected to the cutter head seat 81, the pull rod 91 and the cutter head seat 81 can be fixedly connected in a threaded manner, a fixing block 911 is arranged at the other end of the pull rod 91, a gasket 912 is sleeved on the fixing block 911, one end of the compression spring 92 abuts against the gasket 912, the other end of the compression spring abuts against the cutter supporting seat 7, under the elastic action of the compression spring 92, the pull rod 91 applies force to the cutter head seat 81 to enable the cutter head seat to be far away from the central direction of the supporting spindle 2, even if the tracking roller 83 on the cutter head seat 81 has a movement trend far away from the central direction of the supporting spindle 2, no matter whether the end face of the steel pipe is circular or non-circular, the tracking roller 83 can be tightly attached to the inner wall of the steel pipe to roll.

Referring to fig. 4, when the steel pipe is placed on the outer sidewall of the tracking roller 83, the cutter head seat 81 is positioned by the positioning structure 10; the positioning structure 10 includes an abutting screw 101 and a return spring 102, which are connected to the tool supporting seat 7 by screw threads and extend vertically and downwardly, the abutting screw 101 can abut against the upper portion of the cutter head seat 81, and the return spring 102 is sleeved on the abutting screw 101 and abuts against the tool supporting seat 7; the cutter head seat 81 is lowered by screwing the abutting screw 101 and moves toward the supporting main shaft 2, so that the tracking roller 83 does not abut against the inner wall of the steel pipe under the action of the compression spring 92; after the steel pipe is installed in place, the abutting screw 101 is screwed out, and the tracking roller 83 abuts against the inner wall of the steel pipe again under the action of the compression spring 92. The return spring 102 prevents the abutment screw 101 from moving downward to abut against the cutter head seat 81 due to vibration, and prevents interference with the normal operation of the tracking roller 83 abutting against the inner wall of the steel pipe.

The implementation process of the embodiment of the application is as follows:

when the beveling machine and the steel pipe are relatively positioned, firstly, the abutting screw 101 is screwed in, the abutting screw 101 abuts against the cutter head seat 81 to move towards the direction close to the supporting main shaft 2, the compression spring 92 is stretched, and the tracking roller 83 is adjusted to be positioned in the inner diameter range of the steel pipe; then, the tensioning blocks 42 are arranged on the tensioning claw inclined blocks 41, so that the last tensioning block 42 far away from the support main shaft 2 abuts against the inner wall of the steel pipe, and the support main shaft 2 and the steel pipe are positioned relatively; then the abutting screw 101 is screwed out, and the tracking roller 83 can always abut against the inner wall of the steel pipe under the action of the restoring force of the compression spring 92; meanwhile, the installation position of the cutting tool 82 on the cutter head seat 81 is adjusted according to the groove requirements of steel pipes with different sizes. Finally, the driving motor 13 drives the spindle sleeve 5 to rotate, namely, the tracking tool rest 8 is driven to rotate circumferentially, the servo motor 322 controls the feeding speed of the tracking tool rest 8, automatic feeding and cutting operation is achieved, designated parameters can be set for automatic cutting of the steel pipe, automatic stopping or automatic tool withdrawal is achieved after the designated depth is reached, and groove machining is completed.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.