CN112496921A

CN112496921A - Hollow tube circular cutting and grinding device suitable for different tube diameters

Info

Publication number: CN112496921A
Application number: CN202011497311.5A
Authority: CN
Inventors: 马昊南
Original assignee: Nanjing Xinxin Information Technology Co ltd
Current assignee: Nanjing Xinxin Information Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-03-16

Abstract

The invention discloses a hollow tube circular cutting and polishing device suitable for different tube diameters, which comprises a tube cutting box, wherein a working cavity with a leftward opening is arranged in the tube cutting box, a motor is fixedly arranged in the right wall of the working cavity, the left end of the motor is in power connection with a motor shaft, a rotary drum is arranged on the motor shaft in a left-right sliding and rotating mode, and a limiting disc is fixedly connected to the outer ring of the rotary drum.

Description

Hollow tube circular cutting and grinding device suitable for different tube diameters

Technical Field

The invention relates to the relevant field of pipe cutting machines, in particular to a hollow pipe circular cutting and polishing device suitable for different pipe diameters.

Background

At present, a plurality of pipe cutting machines are divided into manual and automatic pipe cutting machines, when pipes with different diameters are required to be cut, redundant steps are often needed to adjust cutting specifications to adapt to the pipe diameters, the pipe cutting machines are inconvenient, a plurality of pipes are cut by using a cutter in one direction, the pipes are easy to deform during cutting, cut notches after cutting are prone to having more burrs, and subsequent use is affected.

Disclosure of Invention

In order to solve the problems, the embodiment designs a hollow tube circular cutting and polishing device suitable for different tube diameters, the hollow tube circular cutting and polishing device suitable for different tube diameters comprises a tube cutting box, a working chamber with a leftward opening is arranged in the tube cutting box, a motor is fixedly arranged in the right wall of the working chamber, the left end of the motor is in power connection with a motor shaft, a rotary drum is arranged on the motor shaft in a left-right sliding and rotating mode, a limiting disc is fixedly connected to the outer ring of the rotary drum, limiting grooves which are communicated left and right are symmetrically arranged in the limiting disc in an up-down mode, a through groove is formed in the rotary drum in an up-down through mode, a positioning rod is arranged between the front wall and the rear wall of the through groove in a up-down sliding mode, a groove is formed in the positioning rod in a left-right through mode, the motor shaft penetrates through the through groove, a push, the upper side of the position adjusting rod is connected with a blade shaft in a left-right through rotating manner, the blade shaft slides up and down in the limiting groove on the upper side, the left end of the blade shaft is fixedly connected with a blade, the lower side of the position adjusting rod is connected with a grinding shaft in a left-right through rotating manner, the grinding shaft slides up and down in the limiting groove on the lower side, the left end of the grinding shaft is fixedly connected with a retaining ring, the right end of the blade shaft and the right end of the grinding shaft are respectively and fixedly connected with belt wheels in a vertical symmetry manner, a belt is tensioned between the belt wheels, the belt vertically penetrates through the through groove, the right wall of the through groove is rotatably connected with a belt driving wheel, the belt driving wheel is connected to the motor shaft in a left-right sliding manner, the belt driving wheel is meshed with the inner side of the belt, a rotary cylinder cavity is arranged in the rotary cylinder, the engagement block is connected between the left wall and the right wall of the rotary drum cavity in an up-and-down sliding manner, the engagement block is internally provided with an engagement groove which is communicated from left to right, the motor shaft penetrates through the engagement groove, the lower wall of the engagement groove is provided with a friction surface, the upper wall of the rotary drum cavity is fixedly provided with a driving magnet, the working cavity is internally provided with a support plate which is arranged in a vertical moving manner, the upper end of the support plate is provided with a pipe groove, the upper side of the support plate is provided with curved plates which are symmetrical from front to back in a vertical moving manner, the driving magnet is disconnected in an initial state, the lower wall friction surface of the engagement groove is not engaged with the motor shaft, when the motor is used, a pipe is horizontally placed into the working cavity from the left opening of the working cavity to the right and is placed at the lower wall of the pipe groove, and further driving the positioning rod to move leftwards through the through groove, further driving the blade shaft and the grinding shaft to move leftwards, further driving the blade and the outer grinding wheel to move leftwards, further adjusting the position of the blade and the outer grinding wheel relative to the pipe, and having adjusted the pipe length to be cut and the outer ring grinding position, the motor is started, further driving the motor shaft to rotate, further driving the belt to rotate through the belt driving wheel, further driving the blade shaft to rotate through the belt wheel on the upper side, further driving the blade to rotate, the push rod pulls the connecting ring, further driving the positioning rod to move downwards, further driving the blade to move downwards through the blade shaft, further driving the blade to cut the pipe downwards, the driving magnet is switched on, further generating suction force to drive the meshing block to move upwards, and then the lower wall of the meshing groove is driven to be upwards meshed with the motor shaft, the meshing block is fixed relative to the motor shaft at the moment, the motor shaft rotates to drive the meshing block to rotate by taking the motor shaft as a center, the limiting disc is driven to rotate by the rotary drum, the blade shaft is driven to rotate by the positioning rod and the limiting groove by taking the motor shaft as a center, the blade is driven to rotate by taking the motor shaft as a center, the cutting position of the blade on the outer ring of the pipe is adjusted, and after the blade cuts the pipe by a circle around the pipe, the outer grinding wheel is ground by a circle around the cut opening by the same working principle so as to remove burrs.

Preferably, the right wall of the working chamber is fixedly connected with a pull rod, the left end of the pull rod is fixedly connected with a slide box, an inner chamber with an upward opening is arranged in the slide box, a connecting shaft is rotatably connected between the front wall and the rear wall of the inner chamber, clamping plates are rotatably connected on the connecting shaft in a bilateral symmetry manner, clamping springs are fixedly connected between the clamping plates, a push rod is fixedly connected to the lower wall of the inner chamber, a push ball is fixedly connected to the upper end of the push rod and abuts against the lower end of the clamping plate, in an initial state, the push rod drives the push ball to move to an upper push column to block the lower end of the clamping plate so as to drive the upper end of the clamping plate to clamp the limiting plate inwards, and further when the blade is cut and the outer grinding wheel is polished, the limiting plate and the rotary drum cannot rotate so as to keep stable, and when the pull rod drives, and then the rotating cylinder is driven to move left and right, when the mandril drives the jacking ball to move downwards, the clamping plates are opened towards two sides by the elasticity of the clamping spring to loosen the limiting disc, and then the rotating cylinder can drive the limiting disc to rotate.

Preferably, the motor shaft is taken as a symmetrical center, sliding grooves with a leftward opening are symmetrically arranged at the left end of the rotary drum up and down, an inner grinding plate is arranged in the sliding grooves in a sliding manner, tension springs are fixedly connected between the opposite end of the inner grinding plate and the sliding grooves respectively, a sliding sheet is arranged on the motor shaft in a sliding manner left and right, guide rods are hinged between the opposite end of the inner grinding plate and the sliding sheet respectively, a resisting ring is fixedly connected at the left end of the motor shaft, when the pull rod drives the rotary drum to move leftwards, the guide rods are driven by the inner grinding plate to move leftwards, the sliding sheet is driven to move leftwards until the sliding sheet is abutted against the right end of the resisting ring, the inner grinding plate extends leftwards into the inner ring of the pipe, the rotary drum continues to drive the inner grinding plate to move leftwards, and the inner grinding plate is driven by the guide rods to move upwards and downwards away, until the inner grinding plate is abutted against the inner wall of the pipe, the motor shaft drives the meshing block to rotate, and then the inner grinding plate is driven to rotate through the rotary drum, so that the inner grinding plate rotates around the inner wall of the pipe, and then the cut of the pipe is supported into a uniform circle and burrs of the cut of the inner ring are ground.

Preferably, a bidirectional screw is rotatably connected between the upper wall and the lower wall of the working chamber, two sections of threads with the same length from top to bottom of the bidirectional screw have opposite rotating directions, the rear end of the supporting plate is connected with the lower half section of the bidirectional screw through threads, the upper wall of the right side of the working chamber is rotatably connected with a right vertical shaft, the right vertical shaft and the upper end of the bidirectional screw are respectively and fixedly connected with a transmission wheel in a bilateral symmetry manner, a transmission belt is tensioned between the transmission wheels, the lower end of the right vertical shaft is fixedly connected with a right bevel gear, the right wall of the rotary drum is rotatably connected with a cone, the cone is connected with the motor shaft in a left-right sliding manner, when the pull rod drives the rotary drum to move rightwards, the cone is driven to be meshed with the right bevel gear rightwards, the motor shaft drives the cone to rotate, and then drives the right vertical shaft to rotate through the right, and then the conveying wheel on the left side drives the bidirectional screw rod to rotate, and the supporting plate drives the pipe groove to move up and down so as to drive the pipe to move up and down to clamp.

Preferably, the upper half section of the bidirectional screw is connected with an upper arm through threads, the upper end of the upper arm is fixedly connected with a connecting rod, the rear wall of the front end of the connecting rod and the front end of the upper arm are symmetrically and respectively fixedly connected with a sliding shaft, the opposite ends of the sliding shaft are respectively and longitudinally and symmetrically connected with sliding cylinders through sliding cavities in a sliding manner, the opposite ends of the sliding shaft and the sliding cavities are fixedly connected with inner springs, the opposite ends of the sliding cylinders are respectively hinged to the back end of the curved plate, when the bidirectional screw rotates, the upper arm and the lower arm are driven to rotate at the same speed, and the curved plate and the pipe groove are driven to move relatively to adapt to the diameter of a pipe and clamp the pipe.

The invention has the beneficial effects that: the pipe is clamped up and down by the clamping seat and the clamping plate which move up and down relatively, the pipe clamping device can be suitable for clamping pipes with different diameters, the cutting specification is wide, when the pipes are clamped for cutting, the outer ring of the pipe is rotated by the cutting knife by taking the axis of the pipe as a rotation center for circular cutting, the stability and the orderliness of the cut during cutting are ensured, and the inner ring and the outer ring of the cut are polished after cutting, so that the cut is round and smooth.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is an enlarged schematic view of a in fig. 1.

FIG. 3 is a schematic diagram of B-B in FIG. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-3, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The invention relates to a hollow tube circular cutting and polishing device suitable for different tube diameters, which comprises a tube cutting box 11, wherein a working cavity 23 with a leftward opening is arranged in the tube cutting box 11, a motor 12 is fixedly arranged in the right wall of the working cavity 23, the left end of the motor 12 is in power connection with a motor shaft 22, the motor shaft 22 slides left and right and is rotatably provided with a rotary drum 57, the outer ring of the rotary drum 57 is fixedly connected with a limiting disc 19, limiting grooves 17 which are communicated left and right are vertically and symmetrically arranged in the limiting disc 19, a through groove 51 is vertically and is arranged in the rotary drum 57, an adjusting rod 56 is vertically and slidably arranged between the front wall and the rear wall of the through groove 51, a slotted groove 13 is horizontally and is arranged in the adjusting rod 56, the motor shaft 22 passes through the slotted groove 13, the upper wall of the slotted groove 13 is fixedly connected with a push rod 15, the lower end of the push rod 15, the upper side of the positioning rod 56 is connected with a blade shaft 20 in a left-right through manner, the blade shaft 20 slides up and down in the limiting groove 17 on the upper side, the left end of the blade shaft 20 is fixedly connected with a blade 21, the lower side of the positioning rod 56 is connected with a grinding shaft 59 in a left-right through manner, the grinding shaft 59 slides up and down in the limiting groove 17 on the lower side, the left end of the grinding shaft 59 is fixedly connected with a resisting ring 31, the right end of the blade shaft 20 and the right end of the grinding shaft 59 are respectively and fixedly connected with belt wheels 18 in a vertically symmetrical manner, a belt 14 is tensioned between the belt wheels 18, the belt 14 passes through the through groove 51 up and down, the right wall of the through groove 51 is connected with a belt driving wheel 52 in a rotating manner, the belt driving wheel 52 is connected to the motor shaft 22 in a left-right sliding manner, the belt driving wheel 52 is meshed with the inner side of the belt 14, a rotary cylinder cavity 60 is arranged, an engaging block 49 is fixedly connected between opposite ends of the symmetrical springs 58, the engaging block 49 is connected between left and right walls of the rotary drum cavity 60 in a vertical sliding manner, engaging grooves 48 are formed in the engaging block 49 in a left-right through manner, the motor shaft 22 penetrates through the engaging grooves 48, friction surfaces are arranged on the lower walls of the engaging grooves 48, an active magnet 50 is fixedly arranged in the upper wall of the rotary drum cavity 60, a supporting plate 30 is arranged in the working cavity 23 in a vertical moving manner, a pipe groove 29 is arranged at the upper end of the supporting plate 30, a curved plate 27 which is symmetrical in a front-back manner is arranged on the upper side of the supporting plate 30 in a vertical moving manner, the active magnet 50 is disconnected in an initial state, the friction surfaces on the lower wall of the engaging grooves 48 are not engaged with the motor shaft 22, when the motor is used, a pipe is horizontally placed into the working cavity 23 from the left opening of the working cavity 23 to the right and is, then the tube is clamped in the up-down direction, the axis of the tube is collinear with the motor shaft 22, the drum 57 moves to the left, and then the positioning rod 56 is driven to move to the left through the through slot 51, and then the blade shaft 20 and the grinding shaft 59 are driven to move to the left, and further the blade 21 and the outer grinding wheel 33 are driven to move to the left, and further the position of the blade 21 and the outer grinding wheel 33 relative to the tube is adjusted, and the length of the tube to be cut and the position of the outer ring to be ground are adjusted, the motor 12 is started, and further the motor shaft 22 is driven to rotate, and further the belt 14 is driven to rotate by the belt driving wheel 52, and further the blade shaft 20 is driven to rotate by the belt wheel 18 on the upper side, and further the blade 21 is driven to rotate, and the push rod 15 pulls the connecting ring 55, and further the positioning, the blade 21 is driven to move downwards by the blade shaft 20, the blade 21 cuts a pipe downwards, the driving magnet 50 is switched on, so as to generate a suction force to drive the engaging block 49 to move upwards, so as to drive the lower wall of the engaging groove 48 to engage with the motor shaft 22 upwards, so that the engaging block 49 is fixed relative to the motor shaft 22, the motor shaft 22 rotates to drive the engaging block 49 to rotate around the motor shaft 22, so as to drive the limiting disc 19 to rotate through the rotary drum 57, so as to drive the blade shaft 20 to rotate around the motor shaft 22 through the positioning rod 56 and the limiting groove 17, so as to drive the blade 21 to rotate around the motor shaft 22, so as to adjust the cutting position of the blade 21 on the outer ring of the pipe, when the blade 21 cuts the pipe around the pipe for one circle, the outer grinding wheel 33 is ground in a circle around the notch to remove burrs by the same working principle.

Beneficially, a pull rod 41 is fixedly connected to the right wall of the working chamber 23, a slide box 35 is fixedly connected to the left end of the pull rod 41, an inner chamber 36 with an upward opening is arranged in the slide box 35, a connecting shaft 39 is rotatably connected between the front wall and the rear wall of the inner chamber 36, clamping plates 40 are rotatably connected to the connecting shaft 39 in a bilateral symmetry manner, a clamping spring 34 is fixedly connected between the clamping plates 40, a push rod 37 is fixedly connected to the lower wall of the inner chamber 36, a push ball 38 is fixedly connected to the upper end of the push rod 37, the push ball 38 abuts against the lower end of the clamping plate 40, in an initial state, the push rod 37 drives the push ball 38 to push the lower end of the clamping plate 40 upwards to drive the upper end of the clamping plate 40 to clamp the limiting plate 19 inwards, and further when the blade 21 cuts and the outer grinding wheel 33 polishes, the limiting plate 19 and the rotary drum 57 cannot rotate to keep stable, and in use, when, the clamping plate 40 drives the limiting disc 19 to move left and right, so as to drive the rotary drum 57 to move left and right, when the top rod 37 drives the top ball 38 to move down, the clamping plate 40 is opened towards two sides by the elastic force of the clamping spring 34 to loosen the limiting disc 19, and then the rotary drum 57 can drive the limiting disc 19 to rotate.

Advantageously, with the motor shaft 22 as a symmetrical center, the left end of the rotating drum 57 is provided with a sliding slot 61 with a left opening, which is symmetrical up and down, an inner grinding plate 47 is arranged in the sliding slot 61, a tension spring 62 is fixedly connected between the opposite end of the inner grinding plate 47 and the sliding slot 61, a sliding vane 63 is arranged on the motor shaft 22 in a left-right sliding manner, a guide rod 64 is hinged between the opposite end of the inner grinding plate 47 and the sliding vane 63, the left end of the motor shaft 22 is fixedly connected with a resisting ring 31, when the pulling rod 41 drives the rotating drum 57 to move left, the guide rod 64 is driven by the inner grinding plate 47 to move left, and the sliding vane 63 is driven to move left until the sliding vane abuts against the right end of the resisting ring 31, at this time, the inner grinding plate 47 extends into the pipe to the left, at this time, the inner ring 57 continues to drive the inner grinding plate 47 to move left, the rotating drum 57 moves left and drives the inner grinding plate 47 to move up and down away from the motor shaft 22 through the guide rod 64 until the inner grinding plate 47 abuts against the inner wall of the pipe, the motor shaft 22 drives the engaging block 49 to rotate, and then the rotating drum 57 drives the inner grinding plate 47 to rotate, so that the inner grinding plate 47 rotates around the inner wall of the pipe, and then the pipe cut is propped up to be uniform and circular and the burrs of the inner ring cut are ground.

Beneficially, a bidirectional screw 32 is rotatably connected between the upper wall and the lower wall of the working chamber 23, two sections of threads with equal length on the upper side and the lower side of the bidirectional screw 32 have opposite rotating directions, the rear end of the supporting plate 30 is connected to the lower half section of the bidirectional screw 32 through a thread, the upper wall of the right side of the working chamber 23 is rotatably connected to a right vertical shaft 16, the right vertical shaft 16 and the upper end of the bidirectional screw 32 are respectively and fixedly connected with a transmission wheel 25 in a bilateral symmetry manner, a transmission belt 24 is tensioned between the transmission wheels 25, the lower end of the right vertical shaft 16 is fixedly connected to a right conical tooth 53, the right wall of the rotating drum 57 is rotatably connected to a conical drum 54, the conical drum 54 is slidably connected to the motor shaft 22 from left to right, when the pull rod 41 drives the rotating drum 57 to move rightwards, the conical drum 54 is driven to engage with the right conical tooth 53, the motor shaft 22 rotates the conical drum 54, the conveying belt 24 is driven to rotate by the conveying wheel 25 on the right side, the bidirectional screw 32 is driven to rotate by the conveying wheel 25 on the left side, and the pipe groove 29 is driven to move up and down by the supporting plate 30 so as to drive the pipe to move up and down for clamping.

Advantageously, the upper half of the bidirectional screw 32 is connected with an upper arm 28 through a thread, the upper end of the upper arm 28 is connected with a connecting rod 26, the rear wall of the front end of the connecting rod 26 and the front end of the upper arm 28 are symmetrically and respectively connected with a sliding shaft 42, the opposite ends of the sliding shaft 42 are respectively connected with sliding cylinders 44 in a sliding manner through sliding cavities 43 in a front-back symmetrical manner, the opposite ends of the sliding shaft 42 and the sliding cavities 43 are connected with internal springs 45, the opposite ends of the sliding cylinders 44 are respectively hinged with the opposite ends of the curved plate 27, when the bidirectional screw 32 rotates, the upper arm 28 and the lower arm 46 are driven to rotate at the same speed rate, and the curved plate 27 and the pipe groove 29 are driven to move relatively to adapt to the diameter of a pipe and clamp the.

The following detailed description of the use steps of the present invention is provided with reference to fig. 1 to 3:

in the initial state, the driving magnet 50 is turned off, the lower wall friction surface of the engaging groove 48 is not engaged with the motor shaft 22, the push rod 37 drives the push ball 38 to push upward against the lower end of the clamping plate 40, and further drives the upper end of the clamping plate 40 to clamp the limiting disc 19 inward, and further, the limiting disc 19 and the rotary drum 57 cannot rotate to keep stable during the cutting of the blade 21 and the polishing of the outer grinding wheel 33.

For use, a tube is horizontally placed into the working chamber 23 from the left opening of the working chamber 23 to the right and placed on the lower wall of the tube groove 29, the pull rod 41 drives the drum 57 to move to the right, and further drives the cone 54 to engage with the right bevel gear 53 to the right, the motor shaft 22 rotates the cone 54, and further drives the right vertical shaft 16 to rotate via the right bevel gear 53, and further drives the conveyor belt 24 to rotate via the right conveyor wheel 25, and further drives the two-way screw 32 to rotate via the left conveyor wheel 25, and further drives the upper arm 28 to rotate at the same speed as the lower arm 46, and further drives the curved plate 27 and the tube groove 29 to move relatively to adapt to the diameter of the tube and clamp the tube, and causes the axis of the tube and the motor shaft 22, the pull rod 41 drives the drum 57 to move to the left, and further drives the positioning rod 56 to move to the left via the through slot 51, and further drives the blade shaft 20 and the grinding, further adjusting the position of the blade 21 and the outer grinding wheel 33 relative to the pipe, adjusting the pipe length to be cut and the outer ring grinding position, starting the motor 12 to drive the motor shaft 22 to rotate, further driving the belt 14 to rotate through the belt driving wheel 52, further driving the blade shaft 20 to rotate through the belt wheel 18 on the upper side, further driving the blade 21 to rotate, pulling the connection ring 55 by the push rod 15, further driving the positioning rod 56 to move downwards, further driving the blade 21 to move downwards through the blade shaft 20, further cutting the pipe downwards by the blade 21, further driving the magnet 50 to be switched on, further generating suction to drive the engaging block 49 to move upwards, further driving the lower wall of the engaging groove 48 to be engaged with the motor shaft 22 upwards, further fixing the engaging block 49 relative to the motor shaft 22 at this time, rotating the motor shaft 22 to drive the engaging block 49 to rotate with the motor shaft 22 as the, then the blade shaft 20 is driven by the positioning rod 56 and the limiting groove 17 to rotate around the motor shaft 22, and further the blade 21 is driven to rotate around the motor shaft 22, and further the cutting position of the blade 21 on the outer ring of the pipe is adjusted, when the blade 21 cuts the pipe for one circle around the pipe, the outer grinding wheel 33 grinds around the cut by the same working principle for one circle to remove burrs, then the pull rod 41 drives the rotary drum 57 to move leftwards, and further drives the guide rod 64 to move leftwards by the inner grinding plate 47, and further drives the sliding sheet 63 to move leftwards until abutting against the right end of the abutting ring 31, at this time, the inner grinding plate 47 extends leftwards into the inner ring of the pipe, at this time, the rotary drum 57 continues to drive the inner grinding plate 47 to move leftwards, because the sliding sheet 63 is limited by the abutting ring 31, the rotary drum 57 moves leftwards and drives the inner grinding plate 47 to move upwards and downwards away from the motor shaft 22 by the guide rod, and then drive interior grinding plate 47 through rotary drum 57 and rotate, and then interior grinding plate 47 encircles along the pipe inner wall and rotates, and then props up the pipe incision into even circular and polish inner circle incision burr.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a hollow tube circular cutting grinding device who adapts to different pipe diameters, includes tube cutting box, its characterized in that: a working cavity with a leftward opening is arranged in the tube cutting box, a motor is fixedly arranged in the right wall of the working cavity, the left end of the motor is in power connection with a motor shaft, a rotary drum is arranged on the motor shaft in a left-right sliding and rotating manner, a limiting disc is fixedly connected to the outer ring of the rotary drum, limiting grooves which are communicated with each other left and right are symmetrically arranged in the limiting disc up and down, through grooves are formed in the rotary drum in a vertically communicated manner, a positioning rod is arranged between the front wall and the rear wall of each through groove in a vertically communicated manner, slots are formed in the positioning rod in a horizontally communicated manner, the motor shaft penetrates through the slots, a push rod is fixedly connected to the upper wall of each slot, the lower end of each push rod is fixedly connected with a connecting ring, the connecting ring is rotatably connected to the motor shaft, a blade shaft is rotatably connected to the upper side of the positioning rod in a horizontally communicated manner, the blade shaft slides, the grinding shaft slides up and down in the limiting groove on the lower side, the left end of the grinding shaft is fixedly connected with a retaining ring, the right end of the blade shaft and the right end of the grinding shaft are respectively and fixedly connected with belt wheels in a vertically symmetrical manner, a belt is tensioned between the belt wheels, the belt passes through the through groove from top to bottom, the right wall of the through groove is rotatably connected with a belt driving wheel, the belt driving wheel is connected with the motor shaft in a horizontally sliding manner, the belt driving wheel is engaged with the inner side of the belt, a rotary drum cavity is arranged in the rotary drum, the upper wall and the lower wall of the rotary drum cavity are symmetrically and respectively and fixedly connected with symmetrical springs, an engaging block is fixedly connected between the opposite ends of the symmetrical springs, the engaging block is connected between the left wall and the right wall of the rotary drum cavity in a vertically sliding manner, an, the upper wall of the rotary drum cavity is fixedly provided with a driving magnet, the working cavity is internally provided with a supporting plate in an up-and-down moving mode, the upper end of the supporting plate is provided with a pipe groove, and the upper side of the supporting plate is provided with curved plates which are symmetrical front and back in an up-and-down moving mode.

2. The hollow tube circular cutting grinding device suitable for different tube diameters of claim 1, wherein: the working chamber right wall has linked firmly the pull rod, the pull rod left end has linked firmly smooth box, be equipped with the ascending inner chamber of opening in the smooth box, it is connected with the connecting axle to rotate between the inner chamber front and back wall, the rotation of bilateral symmetry is connected with splint on the connecting axle, clamp spring has linked firmly between the splint, the inner chamber lower wall has linked firmly the ejector pin, the ejector pin upper end has linked firmly the kickball, the kickball supports the splint lower extreme.

3. The hollow tube circular cutting grinding device suitable for different tube diameters of claim 1, wherein: the motor shaft is used as a symmetry center, sliding grooves with leftward openings are symmetrically formed in the left end of the rotary drum in the vertical direction, inner grinding plates are arranged in the sliding grooves in a vertically sliding mode, tension springs are fixedly connected between the opposite ends of the inner grinding plates and the sliding grooves respectively, sliding pieces are arranged on the motor shaft in a horizontally sliding mode, guide rods are hinged between the opposite ends of the inner grinding plates and the sliding pieces respectively, and a resisting ring is fixedly connected to the left end of the motor shaft.

4. The hollow tube circular cutting grinding device suitable for different tube diameters of claim 1, wherein: rotate between the wall about the working chamber and be connected with two-way screw rod, two sections screw threads of two-way screw rod isometric from top to bottom revolve to opposite, the layer board rear end through threaded connection in two-way screw rod second half section, working chamber right side upper wall rotates and is connected with right vertical axis, right vertical axis with two-way screw rod upper end bilateral symmetry has linked firmly the transfer gear respectively, the tensioning has the conveyer belt between the transfer gear, right vertical axis lower extreme has linked firmly right awl tooth, the rotary drum right wall rotates and is connected with the awl section of thick bamboo, awl section of thick bamboo horizontal sliding connection in the motor shaft.

5. The hollow tube circular cutting grinding device suitable for different tube diameters of claim 1, wherein: the upper half section of the bidirectional screw is connected with an upper arm through threads, the upper end of the upper arm is fixedly connected with a connecting rod, the rear wall of the front end of the connecting rod and the front end of the upper arm are symmetrically and respectively fixedly connected with a sliding shaft, the opposite ends of the sliding shaft are respectively and longitudinally and symmetrically connected with sliding cylinders through sliding cavities in a sliding mode, the opposite ends of the sliding shaft and the sliding cavities are fixedly connected with inner springs, and the opposite ends of the sliding cylinders are respectively hinged to the back end of the curved plate.