CN113333526A

CN113333526A - Circular tube cutting and bending device and using method thereof

Info

Publication number: CN113333526A
Application number: CN202110549418.8A
Authority: CN
Inventors: 梁云招
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-09-03

Abstract

The invention relates to the technical field of circular tube cutting and bending, in particular to a circular tube cutting and bending device and a using method thereof. According to the circular steel tube bending device, the circular steel tube is clamped and positioned through the first positioning wheel, the second positioning wheel and the bending wheel, the gear can be driven to rotate through the output end of the second driving motor, so that the movable plate can be driven to move towards the direction of the circular rod, the sliding block can be driven to slide on the circular rod through the circular rod, the sliding block can drive the bending wheel to rotate around the first rotating shaft, one end of the circular steel tube can be bent through the bending wheel, the rotating angle of the bending wheel can be adjusted through adjusting the moving distance of the moving wheel, and therefore the bending angle of the circular steel tube can be accurately adjusted.

Description

Circular tube cutting and bending device and using method thereof

Technical Field

The invention relates to the technical field of circular tube cutting and bending, in particular to a circular tube cutting and bending device and a using method thereof.

Background

The circular steel pipe is a steel material having openings at both ends and a hollow concentric cross section, and the length thereof is larger than that of the periphery thereof. The specification of the circular steel tube is represented by the external dimension (such as external diameter or side length), internal diameter and wall thickness, the size range is wide, the circular steel tube can be used for pipelines, thermal equipment, mechanical industry, petroleum geological drilling, containers, chemical industry and special purposes from a capillary tube with a small diameter to a large circular steel tube with a diameter of several meters.

When the round steel pipe is applied to the fields such as pipelines and thermal equipment, the round steel pipe needs to be bent, and the existing round steel pipe bending machine is mostly adopted to bend the round steel pipe. In order to obtain steel pipes with different bending angles in the actual production process, the current method is to cut a long straight steel pipe, heat the bent part of each short round pipe by using an acetylene flame cutting gun, and bend the pipe by using external force, so that the method is time-consuming and labor-consuming, low in bending angle accuracy, low in safety and not high enough in production efficiency.

Disclosure of Invention

In order to overcome the above technical problems, the present invention provides a circular tube cutting and bending device and a method for using the same, the long round steel tubes are stacked in the cavity plate through the feeding plate, the round steel tubes at the bottommost part of the cavity plate fall into the clamping grooves on the bearing plate under the action of gravity, the round steel tubes can be fed between the first two fixing plates in the pushing unit through the first air cylinder, meanwhile, the bearing plate can block the bottom of the cavity plate to prevent the circular steel tube from sliding off, a drive motor in the pushing mechanism can drive the threaded rod to rotate, thereby driving the pushing plate to push the circular tube in the bearing plate into the sliding seat, pushing the circular tube to move by equal distance, thereby being convenient for the bending mechanism to bend the round steel tube and for the cutting mechanism to equidistantly bend the round steel tube, therefore, the feeding speed of the round steel pipe can be increased through the feeding mechanism, and the production efficiency of the bent pipe is improved; one end of the round steel pipe can be pushed to a position between a positioning wheel II and a bending wheel by a pushing unit in the equipment, the round steel pipe is clamped and positioned by the positioning wheel I, the positioning wheel II and the bending wheel, the output end of a driving motor II can drive the gear to rotate, so that the rack plate can be driven to translate through gear engagement, the movable plate can be driven to move towards the round rod direction, the sliding block can be driven to slide on the round rod through the round rod, the sliding block can drive the bending wheel to rotate around a rotating shaft I, one end of the round steel pipe can be bent by the bending wheel, the rotating angle of the bending wheel can be adjusted by adjusting the moving distance of the moving round steel, and the bending angle of the round steel pipe can be accurately adjusted; can buckle the one end of circular steel tube through bending mechanism and handle, after the operation of buckling is accomplished, drive belt pulley two through driving motor three in the cutting mechanism and rotate, thereby can drive belt pulley one through driving belt and rotate, thereby can drive the cutting disc and rotate, rethread cylinder two can drive the cutting disc and cut the circular steel tube, thereby can cut off the one section of buckling on the circular steel tube, enable short return bend at last and carry out the ejection of compact from going out the flitch, thereby can process into a plurality of equidistant return bends with the long pipe, do not need the manual work to cut and buckle, and the production speed is improved.

The purpose of the invention can be realized by the following technical scheme:

a circular tube cutting and bending device comprises a feeding mechanism, wherein the feeding mechanism comprises a support frame unit, the support frame unit comprises an L-shaped operating platform, the top of the L-shaped operating platform is fixedly provided with a feeding unit used for conveying a circular tube, one side of the top of the L-shaped operating platform is fixedly provided with a pushing unit used for pushing the circular tube, one end of the top of the L-shaped operating platform is fixedly provided with a bending mechanism used for bending the circular tube, and the other side of the L-shaped operating platform is fixedly provided with a cutting mechanism;

the mechanism of buckling includes positioning wheel two, the central point of positioning wheel two puts the department to rotate and is connected with the axis of rotation one fixed mutually with L type operation panel, the top and the bottom of positioning wheel two all rotate the one end that is connected with the rotor plate, two rotate between the other end of rotor plate and be connected with the wheel of buckling, the top of buckling the wheel is rotated and is connected with the sliding block, sliding connection has the round bar in the sliding block, the one end of round bar is fixed with the movable plate, the bottom fixedly connected with rack plate of movable plate, the bottom meshing of rack plate is connected with the gear, the central point of gear puts the output of fixedly connected with driving motor one, one side of gear is rotated and is connected with the bearing plate fixed mutually with L type operation panel.

Further lie in, the equal fixedly connected with support column of five corners in L type operation panel bottom, the top of L type operation panel has been seted up and has been cut the groove, the top of L type operation panel is rotated and is connected with positioning wheel one, fixedly connected with ejection of compact board on the L type operation panel is close to a lateral wall of positioning wheel one is through being provided with ejection of compact board to the ejection of compact of the short return bend of being convenient for has improved the flexibility of the formation of equipment.

The feeding unit comprises a cavity plate, a feeding plate is fixed to the top of the cavity plate, supporting blocks and two supporting blocks are fixed to the two ends of the bottom of the cavity plate, the supporting blocks are connected with the supporting plates in a sliding mode, the top of the supporting plate is connected with a connecting plate, a clamping groove is formed in the top of the connecting plate, a first air cylinder and a second air cylinder are fixed to the two ends of the connecting plate along the length direction, one end of the first air cylinder is fixedly connected with a first connecting plate, the first connecting plate is fixed to an L-shaped operating platform, the round steel tubes are conveniently conveyed to the pushing unit through the connecting plate in the feeding mechanism, and the bottom opening of the cavity plate can be plugged through the connecting plate, so that the round steel tubes can be prevented from sliding down.

The pushing unit comprises two first fixing plates fixed with the L-shaped operating platform, a sliding seat is fixed between the first fixing plates, a positioning plate is fixed to one end of the top of the first fixing plates, a threaded rod is connected to one side wall of the positioning plate in a rotating mode, the output end of the second driving motor fixedly connected with the threaded rod is connected with the pushing plate, a clamping block is fixedly connected to the two side walls of the pushing plate, the first fixing plate is fixedly connected to the top of the first fixing plates and a limiting plate in sliding clamping connection with the clamping block, circular steel tubes can be pushed to the position of the bending mechanism conveniently through the pushing unit, and therefore the bending mechanism can be bent conveniently, and the cutting mechanism can cut equidistantly through pushing at equal intervals.

Further, the cutting mechanism comprises a second connecting plate fixed with the L-shaped operating platform, a second air cylinder is fixedly connected to one side wall of the second connecting plate, a second fixing plate is fixed to one end of the second air cylinder, a second rotating shaft is rotatably connected to the side wall of the second fixing plate, a cutting disc clamped with the cutting groove is fixedly connected to the outer wall of the second rotating shaft, a first belt pulley is fixedly connected to one end of the second rotating shaft, a second belt pulley is rotatably connected to the side wall of the second fixing plate, a transmission belt is sleeved on the first belt pulley and the second belt pulley, the output end of a third driving motor is fixedly connected to the central position of the second belt pulley, a connecting arm fixed with the second fixing plate is fixedly connected to the bottom of the third driving motor, and circular pipes of bending parts at equal intervals can be cut through the cutting mechanism, so that a plurality of short bent pipes can be produced, the production efficiency of the equipment is improved.

The movable plate is further provided with a sliding groove along one side wall of the length direction, a second limiting plate fixed with the L-shaped operating platform is connected in the sliding groove in a sliding mode, and the second limiting plate is arranged on the movable plate in a sliding mode, so that the movable plate can move horizontally.

The feeding device is characterized in that the top of the cavity plate is fixedly connected with a baffle which is clamped with the feeding plate, and the baffle is arranged at the top of the cavity plate, so that the circular tube can be prevented from sliding down to the outer side when being filled with the circular tube.

Further lie in, the bottom width in joint groove equals with the width of processing pipe, can be convenient for fix a position the pipe through the joint groove that width and processing pipe width equal to enable the propelling movement unit to promote.

Further, the using method specifically comprises the following steps:

the method comprises the following steps: putting a plurality of long circular tubes into the cavity plate from the feeding plate, wherein the circular tube at the bottommost part of the cavity plate falls into the clamping groove;

step two: opening the first cylinder to push the bearing plate and the round steel tubes into the pushing unit, and simultaneously blocking the opening at the bottom of the cavity plate by the bearing plate to prevent the round steel tubes in the cavity plate from sliding off;

step three: the first driving motor is started, so that the threaded rod can be driven to rotate, the threaded rod drives the pushing plate to move, and one end of the circular steel tube can be pushed between the second positioning wheel and the bending wheel;

step four: the second driving motor is turned on, so that the output end of the second driving motor can drive the gear to rotate, the rack plate and the moving plate can be driven to move towards the direction of the round rod, the round rod can drive the sliding block to slide, the first bending wheel rotating shaft can be driven to rotate by the sliding block, and the end part of the round steel pipe can be bent;

step five: after the circular steel tube is bent, the driving motor III is opened, so that the output end of the driving motor III can drive the belt pulley II to rotate, the belt pulley I can be driven to rotate through the transmission belt, the cutting disc can be driven to rotate, the cylinder II is opened, the cutting disc can be driven to cut the circular steel tube, and the tube section of the bent part can be cut.

The invention has the beneficial effects that:

1. pile up long circular steel tube in the chamber board through the delivery sheet, the circular steel tube of chamber board bottommost can fall into the joint groove on accepting the board under the action of gravity, can send into the circular steel tube between two fixed plates in the propelling movement unit through cylinder one, accept the bottom that the board can block the chamber board simultaneously, prevent the circular steel tube landing, can drive the threaded rod through driving motor one among the pushing mechanism and rotate, thereby can drive the pushing plate and promote in the slide will accepting the pipe in the board, promote the pipe through the equidistance and remove, thereby the bending machine that can be convenient for buckles the circular steel tube, and make things convenient for cutting mechanism to carry out the equidistance just to the circular steel tube, thereby can accelerate the material feeding speed of circular steel tube through feeding mechanism, the production efficiency of return bend has been improved.

2. Through can promote the one end of circular steel tube to the locating wheel two and buckle between the wheel in the equipment propelling movement unit, by locating wheel one, locating wheel two and buckle the wheel and carry out the centre gripping location to circular steel tube, output through driving motor two can drive the gear and rotate, thereby can cross gear engagement transmission rack board and carry out the translation, thereby can drive the movable plate and remove toward the pole direction, thereby can drive the sliding block through the pole and slide on the pole, thereby enable the sliding block and drive the wheel of buckling and rotate round axis of rotation one, thereby enable the one end of buckling wheel pair circular steel tube and buckle, the round steel pivoted angle of wheel can be buckled in the adjustment of displacement through the adjustment removal, thereby the angle of buckling of adjustment circular steel tube that can be accurate.

3. Can buckle the one end of circular steel tube through bending mechanism and handle, after the operation of buckling is accomplished, drive belt pulley two through driving motor three in the cutting mechanism and rotate, thereby can drive belt pulley one through driving belt and rotate, thereby can drive the cutting disc and rotate, rethread cylinder two can drive the cutting disc and cut the circular steel tube, thereby can cut off the one section of buckling on the circular steel tube, enable short return bend at last and carry out the ejection of compact from going out the flitch, thereby can process into a plurality of equidistant return bends with the long pipe, do not need the manual work to cut and buckle, and the production speed is improved.

Drawings

The invention will be further described with reference to the accompanying drawings.

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

FIG. 2 is a schematic overall side view of the present invention;

FIG. 3 is a schematic view of the feed mechanism of the present invention;

FIG. 4 is a schematic view of a supporting frame unit according to the present invention;

FIG. 5 is a schematic view of the feed unit of the present invention;

FIG. 6 is a schematic diagram of a pushing unit according to the present invention;

FIG. 7 is a schematic view of the bending mechanism of the present invention;

fig. 8 is a schematic view of the cutting mechanism of the present invention.

In the figure: 100. a feeding mechanism; 110. a support frame unit; 111. an L-shaped operating table; 112. a support pillar; 113. cutting the groove; 114. positioning a first wheel; 115. a discharge plate; 120. a feeding unit; 121. a cavity plate; 122. a feeding plate; 123. a baffle plate; 124. a support block; 125. a bearing plate; 126. a clamping groove; 127. a first cylinder; 128. a first connecting plate; 130. a pushing unit; 131. a first fixing plate; 132. a slide base; 133. positioning a plate; 134. a threaded rod; 135. a push plate; 136. a clamping block; 137. a first limiting plate; 138. driving a motor I; 200. a bending mechanism; 201. a second positioning wheel; 202. rotating a first shaft; 203. a rotating plate; 204. a bending wheel; 205. a slider; 206. a round bar; 207. moving the plate; 208. a rack plate; 209. a gear; 210. a second driving motor; 211. a bearing plate; 212. a chute; 213. a second limiting plate; 300. a cutting mechanism; 301. a second connecting plate; 302. a second air cylinder; 303. a second fixing plate; 304. a second rotating shaft; 305. cutting the disc; 306. a first belt pulley; 307. a second belt pulley; 308. a drive belt; 309. driving a motor III; 310. a connecting arm.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, a circular tube cutting and bending device includes a feeding mechanism 100, the feeding mechanism 100 includes a supporting frame unit 110, the supporting frame unit 110 includes an L-shaped operating platform 111, a feeding unit 120 for conveying a circular tube is fixedly disposed at the top of the L-shaped operating platform 111, a pushing unit 130 for pushing the circular tube is fixedly disposed at one side of the top of the L-shaped operating platform 111, a bending mechanism 200 for bending the circular tube is fixedly disposed at one end of the top of the L-shaped operating platform 111, and a cutting mechanism 300 is fixedly disposed at the other side of the L-shaped operating platform 111;

the bending mechanism 200 comprises a second positioning wheel 201, a first rotating shaft 202 fixed with the L-shaped operating platform 111 is rotatably connected to the center position of the second positioning wheel 201, one ends of rotating plates 203 are rotatably connected to the top and the bottom of the second positioning wheel 201, a bending wheel 204 is rotatably connected between the other ends of the two rotating plates 203, a sliding block 205 is rotatably connected to the top of the bending wheel 204, a round rod 206 is slidably connected into the sliding block 205, a moving plate 207 is fixed to one end of the round rod 206, a rack plate 208 is fixedly connected to the bottom of the moving plate 207, a gear 209 is meshed with the bottom of the rack plate 208, an output end of a first driving motor 210 is fixedly connected to the center position of the gear 209, and a bearing plate 211 fixed with the L-shaped operating platform 111 is rotatably connected to one side of the gear 209.

The equal fixedly connected with support column 112 of five corners in L type operation panel 111 bottom, cutting groove 113 has been seted up at the top of L type operation panel 111, and the top of L type operation panel 111 is rotated and is connected with positioning wheel 114, and L type operation panel 111 is close to fixedly connected with ejection of compact board 115 on the lateral wall of positioning wheel 114, through being provided with ejection of compact board 115 to the ejection of compact of the short return bend of being convenient for has improved the flexibility of the formation of equipment.

Feeding unit 120 includes cavity board 121, cavity board 121 top is fixed with delivery sheet 122, the bottom both ends of cavity board 121 all are fixed with supporting shoe 124, sliding connection has between two supporting shoe 124 accepts board 125, accept the top of board 125 and seted up joint groove 126, accept board 125 and all be fixed with cylinder 127 along length direction's both ends, the one end fixedly connected with of two cylinder 127 and L type operation panel 111 be fixed connection board 128 mutually, it is convenient for carry the circular steel pipe to propelling movement unit 130 to accept board 125 through among feeding mechanism 100, and can plug up the bottom opening of cavity board 121 through accepting board 125, prevent inside circular steel pipe landing.

The pushing unit 130 comprises two first fixing plates 131 fixed with the L-shaped operating platform 111, a sliding seat 132 is fixed between the two first fixing plates 131, a positioning plate 133 is fixed to one end of the top of each first fixing plate 131, a threaded rod 134 is connected to one side wall of the positioning plate 133 in a rotating mode, one end of the threaded rod 134 is fixedly connected with the output end of a second driving motor 138 and fixedly connected with the output end of the threaded rod 134, a pushing plate 135 is connected to the threaded rod 134 in a rotating mode, clamping blocks 136 are fixedly connected to two side walls of the pushing plate 135, limiting plates 137 in sliding clamping connection with the clamping blocks 136 are fixedly connected to the tops of the two first fixing plates 131, pushing of round steel tubes to the position of the bending mechanism 200 can be facilitated through the pushing unit 130, bending of the bending mechanism 200 can be facilitated, pushing at equal intervals is achieved, and the cutting mechanism 300 can cut at equal intervals.

The cutting mechanism 300 comprises a second connecting plate 301 fixed with the L-shaped operating platform 111, a second air cylinder 302 is fixedly connected to one side wall of the second connecting plate 301, a second fixing plate 303 is fixed to one end of the second air cylinder 302, a second rotating shaft 304 is rotatably connected to the side wall of the second fixing plate 303, a cutting disc 305 clamped with the cutting groove 113 is fixedly connected to the outer wall of the second rotating shaft 304, a first belt pulley 306 is fixedly connected to one end of the second rotating shaft 304, a second belt pulley 307 is rotatably connected to the side wall of the second fixing plate 303, a transmission belt 308 is sleeved on the first belt pulley 306 and the second belt pulley 307, an output end of a third driving motor 309 is fixedly connected to the central position of the second belt pulley 307, a connecting arm 310 fixed with the second fixing plate 303 is fixedly connected to the bottom of the third driving motor 309, and a circular tube with bending parts at equal intervals can be cut through the cutting mechanism 300, so that a plurality of short bent tubes can be produced, the production efficiency of the equipment is improved.

A sliding groove 212 is formed in one side wall of the moving plate 207 along the length direction, a second limit plate 213 fixed to the L-shaped operating platform 111 is slidably connected to the sliding groove 212, and the second limit plate 213 is slidably disposed on the moving plate 207, so that the moving plate 207 can move horizontally.

The top of the cavity plate 121 is fixedly connected with a baffle 123 clamped with the feeding plate 122, and the baffle 123 is arranged at the top of the cavity plate 121, so that when round tubes are filled, the round tubes can be prevented from sliding down to the outer side.

The bottom width of joint groove 126 equals with the width of processing the pipe, can be convenient for fix a position the pipe through the joint groove 126 that width and processing pipe width equal to enable propelling movement unit 130 to promote.

The using method specifically comprises the following steps:

the method comprises the following steps: a plurality of long round tubes are put into the cavity plate 121 from the feeding plate 122, and the round tube at the bottommost part of the cavity plate 121 falls into the clamping groove 126;

step two: opening the first cylinder 127 to push the bearing plate 125 and the circular steel tube into the pushing unit 130, and meanwhile, the bearing plate 125 blocks the opening at the bottom of the cavity plate 121 to prevent the circular steel tube in the cavity plate 121 from sliding off;

step three: the first driving motor 138 is turned on, so that the threaded rod 134 can be driven to rotate, the threaded rod 134 drives the pushing plate 135 to move, and one end of the round steel tube can be pushed between the second positioning wheel 201 and the bending wheel 204;

step four: turning on the second driving motor 210, so that the output end of the second driving motor 210 can drive the gear 209 to rotate, thereby driving the rack plate 208 and the moving plate 207 to move towards the direction of the round rod 206, and the round rod 206 can drive the sliding block 205 to slide, thereby driving the bending wheel 204 to rotate by taking the first rotating shaft 202 as the center through the sliding block 205, thereby bending the end part of the round steel pipe;

step five: after the circular steel tube is bent, through opening three driving motor 309 for the output of three driving motor 309 can drive two belt pulleys 307 and rotate, thereby can drive one belt pulley 306 through driving belt 308 and rotate, thereby can drive cutting disc 305 and rotate, then open two 302 of cylinder and can drive cutting disc 305 and carry out cutting treatment to the circular steel tube, thereby can cut the pipeline section of the part of buckling.

The working principle is as follows: when the circular steel tube pushing device is used, a long circular tube is placed into the cavity plate 121 from the feeding plate 122, the circular tube at the bottom of the cavity plate 121 falls into the clamping groove 126 in the bearing plate 125, the circular tube on the bearing plate 125 can be pushed into the pushing unit 130 by opening the first air cylinder 127, meanwhile, the bearing plate 125 can block the opening in the bottom of the cavity plate 121 to prevent a circular steel tube in the cavity plate 121 from sliding off, and the first driving motor 138 is opened to drive the first threaded rod 134 to rotate so that the first threaded rod 134 drives the pushing plate 135 to move and push the circular steel tube to the positions of the sliding seat 132 and the rear bending mechanism 200, so that the circular steel tube can be pushed equidistantly and the long straight circular tube can be processed into a plurality of short bent tubes;

when one end of the circular steel tube is bent, the second driving motor 210 needs to be turned on, the output end of the second driving motor 210 can drive the gear 209 to rotate, so that the rack plate 208 can be driven to move, the moving plate 207 can drive the circular rod 206 to move, the circular rod 206 can drive the sliding block 205 to slide on the circular rod 206, the sliding block 205 can drive the bending wheel 204 to rotate around the first rotating shaft 202, one end of the circular steel tube can be bent, and the bending angle of the circular steel tube can be adjusted by adjusting the moving distance of the moving plate 207;

after the pipe is buckled, through opening driving motor three 309, make driving motor three 309's output can drive two belt pulleys 307 and rotate, thereby can drive one belt pulley 306 through driving belt 308 and rotate, thereby can drive cutting disc 305 and rotate, can drive cutting disc 305 through opening two 302 cylinders and cut the processing to the circular steel tube, thereby can cut the pipeline section of the part of buckling, thereby can utilize this equipment to process into a plurality of equidistant return bends with the long circular pipe, do not need the manual work to cut and buckle, and the production speed is improved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims

1. The circular tube cutting and bending device is characterized by comprising a feeding mechanism (100), wherein the feeding mechanism (100) comprises a support frame unit (110), the support frame unit (110) comprises an L-shaped operating platform (111), a feeding unit (120) used for conveying a circular tube is fixedly arranged at the top of the L-shaped operating platform (111), a pushing unit (130) used for pushing the circular tube is fixedly arranged on one side of the top of the L-shaped operating platform (111), a bending mechanism (200) used for bending the circular tube is fixedly arranged at one end of the top of the L-shaped operating platform (111), and a cutting mechanism (300) is fixedly arranged on the other side of the L-shaped operating platform (111);

the bending mechanism (200) comprises a second positioning wheel (201), the central position of the second positioning wheel (201) is rotatably connected with a first rotating shaft (202) fixed with the L-shaped operating platform (111), the top and the bottom of the second positioning wheel (201) are both rotatably connected with one end of a rotating plate (203), two bending wheels (204) are rotatably connected between the other ends of the rotating plate (203), the top of each bending wheel (204) is rotatably connected with a sliding block (205), a round rod (206) is slidably connected in the sliding block (205), a moving plate (207) is fixed at one end of the round rod (206), a rack plate (208) is fixedly connected to the bottom of the moving plate (207), a gear (209) is engaged with the bottom of the rack plate (208), and the central position of the gear (209) is fixedly connected with the output end of a first driving motor (210), one side of the gear (209) is rotatably connected with a bearing plate (211) fixed with the L-shaped operating platform (111).

2. The circular tube cutting and bending device according to claim 1, wherein support columns (112) are fixedly connected to five corners of the bottom of the L-shaped operating platform (111), a cutting groove (113) is formed in the top of the L-shaped operating platform (111), a first positioning wheel (114) is rotatably connected to the top of the L-shaped operating platform (111), and a discharge plate (115) is fixedly connected to one side wall, close to the first positioning wheel (114), of the L-shaped operating platform (111).

3. The round tube cutting and bending device as claimed in claim 1, wherein the feeding unit (120) comprises a cavity plate (121), a feeding plate (122) is fixed to the top of the cavity plate (121), supporting blocks (124) are fixed to two ends of the bottom of the cavity plate (121), a receiving plate (125) is connected between the two supporting blocks (124) in a sliding mode, a clamping groove (126) is formed in the top of the receiving plate (125), first air cylinders (127) are fixed to two ends of the receiving plate (125) in the length direction, and one ends of the first air cylinders (127) are fixedly connected with a first connecting plate (128) fixed to the L-shaped operating platform (111).

4. The round pipe cutting and bending device as claimed in claim 1, wherein the pushing unit (130) comprises two first fixing plates (131) fixed to the L-shaped operating platform (111), a sliding base (132) is fixed between the two first fixing plates (131), a positioning plate (133) is fixed to one end of the top of the two first fixing plates (131), a threaded rod (134) is rotatably connected to one side wall of the positioning plate (133), one end of the threaded rod (134) is fixedly connected with the output end of a second driving motor (138), threaded rod (134) go up the spiral-lock and be connected with propelling movement board (135), equal fixedly connected with joint piece (136) on the both sides wall of propelling movement board (135), two the equal fixedly connected with in top of fixed plate (131) and the limiting plate (137) of joint piece (136) slip joint.

5. The round tube cutting and bending device as claimed in claim 1, wherein the cutting mechanism (300) comprises a second connecting plate (301) fixed with the L-shaped operating table (111), a second cylinder (302) is fixedly connected to one side wall of the second connecting plate (301), a second fixing plate (303) is fixed to one end of the second cylinder (302), a second rotating shaft (304) is rotatably connected to the side wall of the second fixing plate (303), a cutting disc (305) clamped with the cutting groove (113) is fixedly connected to the outer wall of the second rotating shaft (304), a first belt pulley (306) is fixedly connected to one end of the second rotating shaft (304), a second belt pulley (307) is rotatably connected to the side wall of the second fixing plate (303), a transmission belt (308) is sleeved on the first belt pulley (306) and the second belt pulley (307), and an output end of a third driving motor (309) is fixedly connected to the center position of the second belt (307), and the bottom of the driving motor III (309) is fixedly connected with a connecting arm (310) fixed with the fixing plate II (303).

6. The circular tube cutting and bending device as claimed in claim 1, wherein a sliding groove (212) is formed in one side wall of the moving plate (207) along the length direction, and a second limiting plate (213) fixed to the L-shaped operating table (111) is slidably connected to the sliding groove (212).

7. The circular tube cutting and bending device as claimed in claim 3, wherein a baffle (123) clamped with the feeding plate (122) is fixedly connected to the top of the cavity plate (121).

8. The round tube cutting and bending device as claimed in claim 3, wherein the bottom width of the clamping groove (126) is equal to the width of the machined round tube.

9. The use method of the circular tube cutting and bending device according to any one of claims 1 to 8, which is characterized by comprising the following steps:

the method comprises the following steps: a plurality of long round tubes are put into the cavity plate (121) from the feeding plate (122), and the round tube at the bottommost part of the cavity plate (121) falls into the clamping groove (126);

step two: opening the first cylinder (127) to push the bearing plate (125) and the round steel tubes into the pushing unit (130), and simultaneously blocking the opening at the bottom of the cavity plate (121) by the bearing plate (125) to prevent the round steel tubes in the cavity plate (121) from sliding off;

step three: the first driving motor (138) is turned on, so that the threaded rod (134) can be driven to rotate, the threaded rod (134) drives the pushing plate (135) to move, and one end of the round steel tube can be pushed between the second positioning wheel (201) and the bending wheel (204);

step four: opening a second driving motor (210) to enable the output end of the second driving motor (210) to drive a gear (209) to rotate, so that a rack plate (208) and a moving plate (207) can be driven to move towards the direction of a round rod (206), the round rod (206) can drive a sliding block (205) to slide, a first rotating shaft (202) of a bending wheel (204) can be driven by the sliding block (205) to rotate as the center, and the end part of the round steel pipe can be bent;

step five: after the circular steel tube is bent, through opening driving motor three (309), make the output of driving motor three (309) drive belt pulley two (307) and rotate, thereby can drive belt pulley one (306) through driving belt (308) and rotate, thereby can drive cutting disc (305) and rotate, then open cylinder two (302) and can drive cutting disc (305) and carry out cutting process to the circular steel tube, thereby can cut the pipeline section of the part of buckling.