CN111644497A

CN111644497A - U-shaped pipe bending machine

Info

Publication number: CN111644497A
Application number: CN202010484646.7A
Authority: CN
Inventors: 孟伟; 杨永杰; 廖家蒙; 宋敬儒
Original assignee: Sumaite Intelligent Technology Jiangsu Co ltd
Current assignee: Sumaite Intelligent Technology Jiangsu Co ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-09-11

Abstract

The application provides a U-shaped pipe bending machine, and belongs to the field of machining equipment. The U-shaped pipe bending machine comprises a rack and a pipe straightening portion, wherein the pipe straightening portion is sequentially arranged on the rack along the length direction of the rack, a pipe conveying portion, a pipe cutting portion, a bent pipe portion and a material returning portion, the bent pipe portion comprises a bending portion and a die portion, the bending portion and the die portion are sequentially arranged along the length direction of the rack, the bending portion is provided with a first position and a second position relative to the die portion, the bending portion can be arranged in a turnover mode to move between the first position and the second position, when the bending portion is located at the first position, the bending portion is turned over to the die portion to bend pipes, when the bending portion is located at the second position, the bending portion resets, and the material returning portion is used for pushing the pipes after bending out of the bent pipe portion when the bending portion is located at the. The application provides a U type bending machine can make U type bending machine increase functions such as tubular product alignment, cut off and material returned, can satisfy user's the overwhelming majority demand.

Description

U-shaped pipe bending machine

Technical Field

The application belongs to the technical field of processing equipment and relates to a U-shaped pipe bending machine.

Background

The pipe bender is used as a pipe bending device and has wide application in various industries. The pipe bending machine can be divided into various types, such as a U-shaped pipe bending machine, according to the shape of the bent pipe after machining. The U-shaped pipe bender is used for centering and folding the pipe into a U-shaped bent pipe.

The existing U-shaped pipe bender has single function and only has a bending function, and the requirements of users are difficult to meet. At present, most of pipe bending machines in common use bend pipes with prefabricated fixed sizes, operate in steps in the production process, and cannot timely, efficiently and automatically complete the processes of feeding, rounding, straightening, feeding, cutting to length without scraps, bending, returning and the like of the pipes from an initial reel, so that the processing procedures are complex in flow operation, time is wasted, and the production efficiency is greatly reduced. In addition, the copper pipe processing requirement is fine, the surface has no obvious defects such as dent, bulge, corrugation, crack (opening), scratch, clamping (pressing) mark and the like, and the pipe opening is smooth and flat and has no burr, crack and the like.

Disclosure of Invention

Technical problem to be solved

In view of the technical problem, the application provides a U type bending machine and have its bending machine, through setting up the boosting mechanism, and the piston rod that drives actuating cylinder passes through the boosting mechanism and presss from both sides the mould piece drive connection and move with the drive clamp module piece, the boosting mechanism can increase the output power of cylinder, make the clamping force of clamp module mechanism to tubular product great, improve the return bend precision of U type bending machine when bending to the great tubular product of pipe diameter or pipe wall, can realize simultaneously that pipe fitting blowing, school circle, alignment, pay-off, scale chipless cutting, bend, the automatic integration of material returned are bent and are processed, bending machining production efficiency has been improved greatly.

(II) technical scheme

The application provides a U type bending machine, including the frame and set gradually the tubular product alignment portion in the frame along the length direction of frame, tubular product conveying part, tubular product cutting off portion, curved pipe portion and material returned portion, curved pipe portion includes the bending portion and the mould portion that lean on that the length direction along the frame set gradually, the relative mould portion of bending has primary importance and second place, the portion of bending sets up with can overturning and removes between primary importance and second place, when the portion of bending is located primary importance, the portion of bending overturns to lean on to bend in order to the tubular product in the mould portion, when the portion of bending is located the second place, the portion of bending resets, material returned portion is used for pushing out the tubular product after bending from curved pipe portion when the portion of bending is located the primary importance.

Further, the profiling portion includes profiling splint, the crossbeam board, first sliding block and first drive arrangement, profiling splint fix on the crossbeam board, crossbeam board below fixedly connected with profiling crossbeam, the long waist hole of slant has been seted up at profiling crossbeam middle part, the downthehole nestification of long waist has cam bearing, cam bearing fixed connection is in the upper portion outside of first sliding block, first sliding block links to each other with first drive arrangement, first sliding block is adjustable along the length direction of frame, the both ends below of crossbeam board is provided with guide rail bracket, guide rail bracket and the height direction sliding connection of profiling crossbeam along the frame.

Further, the profiling portion further comprises a horizontal limiting device, the horizontal limiting device comprises a first limiting seat, a first limiting screw and a first nut, a through hole is formed in the first limiting seat along the length direction of the rack, the first nut is fixed to one side of the through hole of the first limiting seat, and the first limiting screw penetrates through the through hole and is connected with the first nut.

Furthermore, the inclination angle of the oblique long waist hole is set within the range of 8-45 degrees.

The bending mechanism comprises a first bending clamping plate and a second bending clamping plate which are oppositely arranged, and the bending mechanism also comprises a first linear driver, wherein a driving rod of the first linear driver is in driving connection with the second bending clamping plate so as to drive the second bending clamping plate to move towards or away from the first bending clamping plate; the bending part further comprises a second driving device, and the second driving device is in driving connection with the first rotating shaft to drive the first rotating shaft to rotate.

Further, the first linear actuator comprises a second cylinder, the second cylinder comprises a second cylinder seat and a second driving rod, the first linear actuator further comprises a force increasing device, and the force increasing device comprises:

the first mounting seat is fixedly connected to the second cylinder seat, a mounting cavity which penetrates through the first mounting seat is formed in the first mounting seat, and the second driving rod is inserted into the mounting cavity;

the ejector rod is positioned in the mounting cavity and is fixedly connected with the second driving rod, and the ejector rod is provided with an ejector section;

the output rod is provided with a first end and a second end, the first end is positioned in the mounting cavity, the second end extends out of the mounting cavity, and the output rod is movably arranged relative to the first mounting seat along the axial direction;

the pushing section is matched with the first driving pieces in an abutting mode to drive the first driving pieces to move towards the direction of the output rod.

Furthermore, a limiting ring extending outwards is arranged on the first end, and the first driving piece is in contact with the limiting ring; the force increasing device further comprises a first elastic piece located in the installation cavity, the first elastic piece is sleeved on the force output rod, one end of the first elastic piece is in contact with the bottom surface of the limiting ring, and the other end of the first elastic piece is in contact with the cavity wall of the installation cavity.

Further, the tubular product alignment portion is including setting up the alignment subassembly in the frame, be formed with the alignment passageway that can supply tubular product to pass through in the alignment subassembly, the alignment subassembly includes the first alignment portion that sets gradually along the length direction of frame, second alignment portion and third alignment portion, first alignment portion includes at least a pair of first alignment wheel, second alignment portion includes at least a pair of second alignment wheel, third alignment portion includes at least a pair of third alignment wheel, the axial of first alignment wheel is perpendicular with the axial of second alignment wheel, the axial of first alignment wheel is parallel with the axial of third alignment wheel, first alignment wheel, all be equipped with annular alignment groove on the outer peripheral face of second alignment wheel and third alignment wheel.

Further, the pipe conveying part comprises a continuous feeding mechanism arranged on the rack, the continuous feeding mechanism comprises a first belt transmission mechanism and a second belt transmission mechanism, the first belt transmission mechanism comprises a first transmission belt, the second belt transmission mechanism comprises a second transmission belt, the first transmission belt and the second transmission belt are adjacently arranged, annular accommodating grooves are concavely formed in the outer peripheral surfaces of the first transmission belt and the second transmission belt, the two accommodating grooves jointly form a feeding channel, the continuous feeding mechanism further comprises a belt pressing mechanism, the belt pressing mechanism comprises a second driving piece and a belt pressing piece, part of the belt pressing piece is located in an accommodating cavity defined by the first transmission belt, and the second driving piece is in driving connection with the belt pressing piece to drive the belt pressing piece to move in the direction close to or far away from the feeding channel.

Further, the second driving piece comprises a second mounting seat and a second linear driver, the second mounting seat is fixedly connected to the frame, the second linear driver is fixedly connected to the second mounting seat, the second driving piece further comprises a guide column and a second elastic piece, the guide column is provided with a third end and a fourth end, the third end movably penetrates through the second mounting seat and is fixedly connected with the pressure belt piece, the fourth end is provided with a flange portion, the second elastic piece is sleeved on the guide column and is located between the flange portion and the second mounting seat, and the second linear driver is in driving fit with the pressure belt piece to drive the pressure belt piece to move along the direction close to the feeding channel.

(III) advantageous effects

According to the technical scheme, the method has the following beneficial effects:

the utility model provides a U type bending machine, through set gradually the tubular product alignment portion in the frame along the length direction of frame, tubular product conveying part, tubular product cutting off portion, bent pipe portion and material returned portion, the bent pipe portion includes the portion of bending and the mould portion that leans on that set gradually along the length direction of frame, the portion of bending has first position and second position relative to the mould portion, the portion of bending can set up with overturning in order to remove between first position and second position, when the portion of bending is located the first position, the portion of bending overturns to lean on the mould portion in order to bend the tubular product, when the portion of bending is located the second position, the portion of bending resets, material returned portion is used for pushing out the tubular product after bending from the bent pipe portion when the portion of bending is located the first position, increase tubular product through U type bending machine, functions such as alignment and material returned, can carry out automatic accurate regulation location to pipe fittings such as copper pipe, realize pipe fitting blowing, The bending machine has the advantages that the bending machine integrates the functions of rounding, straightening, feeding, fixed-length chipless cutting, bending and material returning automatically, the bending production efficiency is greatly improved, and most requirements of users can be met.

Drawings

Fig. 1 is a schematic perspective view of a U-shaped pipe bender according to an embodiment of the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a front view of the mold backing portion of the present embodiment;

FIG. 5 is a schematic top view of the mold portion of the embodiment of the present application;

FIG. 6 is a perspective view of the mold backing portion of the embodiment of the present application;

FIG. 7 is a cross-sectional view taken at C-C of FIG. 4;

FIG. 8 is a perspective view showing the structure of a bent pipe portion according to an embodiment of the present invention;

FIG. 9 is a perspective view of a first linear actuator according to an embodiment of the present application;

FIG. 10 is a schematic front view of a first linear driver according to an embodiment of the present application;

FIG. 11 is a cross-sectional view taken along line D-D of FIG. 10;

FIG. 12 is a perspective view of the tube conveying section in the embodiment of the present application;

FIG. 13 is a front view of the tube conveying section in the embodiment of the present application;

FIG. 14 is a cross-sectional view E-E of FIG. 13;

FIG. 15 is a perspective view of the tube straightening portion in the embodiment of the present application;

FIG. 16 is a front view of the tube straightening portion in the embodiment of the present application;

FIG. 17 is a schematic side view of the structure of the tube straightening portion in the embodiment of the present application;

FIG. 18 is a sectional view taken along line F-F of FIG. 16;

fig. 19 is an enlarged view of a portion G in fig. 18.

Detailed Description

The application provides a U-shaped pipe bending machine, through a pipe straightening part 2000, a pipe conveying part 3000, a pipe cutting part 4000, a bent pipe part 5000 and a material returning part 6000 which are sequentially arranged on a rack 1000 along the length direction of the rack 1000, wherein the bent pipe part 5000 comprises a bending part and a mould leaning part which are sequentially arranged along the length direction of the rack 1000, the bending part has a first position and a second position relative to the mould leaning part, the bending part can be overturned to move between the first position and the second position, when the bending part is positioned at the first position, the bending part is turned over to the mould leaning part to bend the pipe, when the bending part is at the second position, the bending part is reset, the material returning part 6000 is used for pushing the bent pipe out of the bent pipe part 5000 when the bending part is at the first position, the U-shaped pipe bender has the functions of pipe straightening, cutting, material returning and the like, and can meet most requirements of users.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to the accompanying drawings in combination with specific embodiments.

In an exemplary embodiment of the present disclosure, a U-shaped bender is provided, and the following describes each component of the present embodiment in detail:

in this embodiment of the present application:

referring to fig. 1-3, an embodiment of the present application provides a U-shaped pipe bender, including a rack 1000, and a pipe straightening portion 2000, a pipe conveying portion 3000, a pipe cutting portion 4000, a bent pipe portion 5000, and a material returning portion 6000 sequentially disposed on the rack 1000 along a length direction of the rack 1000, where the bent pipe portion 5000 includes a bending portion and a mold leaning portion sequentially disposed along the length direction of the rack 1000, the bending portion has a first position and a second position relative to the mold leaning portion, the bending portion is rotatably disposed to move between the first position and the second position, when the bending portion is located at the first position, the bending portion is turned over to the mold leaning portion to bend a pipe, when the bending portion is located at the second position, the bending portion resets, and the material returning portion 6000 is configured to push out the bent pipe from the bent pipe portion 5000 when the bending portion is located at the first position.

In this embodiment, the U-shaped pipe bender includes a pipe straightening portion 2000, a pipe conveying portion 3000, a pipe cutting portion 4000, a pipe bending portion 5000, and a material returning portion 6000, and the pipe straightening portion 2000, the pipe conveying portion 3000, the pipe cutting portion 4000, the pipe bending portion 5000, and the material returning portion 6000 are sequentially disposed on the rack 1000 along a length direction of the rack 1000. The coil pipe to be processed can sequentially pass through a pipe straightening part 2000, a pipe conveying part 3000, a pipe cutting part 4000, a bent pipe part 5000 and a material returning part 6000. The pipe straightening part 2000 is used for straightening pipes, the pipe conveying part 3000 is used for continuously conveying the pipes to the pipe cutting part 4000, the pipe cutting part 4000 is used for cutting the pipes to obtain short pipes with required lengths, the bent pipe part 5000 is used for bending the pipes, and the material returning part 6000 is used for pushing the bent pipes out of the bent pipe part 5000. Wherein, bent pipe portion 5000 includes the portion of bending and the portion of leaning on the mould that sets gradually along the length direction of frame 1000, and tubular product gets into the portion of bending earlier then gets into the portion of leaning on the mould again promptly. The relative profiling portion of bending has primary importance and second place, and when the portion of bending was located the primary importance, the portion of bending upset was in order to bend the tubular product to the profiling portion, and when the portion of bending was located the second place, the portion of bending resets so that tubular product gets into bent pipe portion 5000 once more, and material returned portion 6000 is used for pushing out the tubular product after will bending from bent pipe portion 5000 when the portion of bending was located the primary importance. The bending part can be arranged in a reversible mode to move between a first position and a second position.

In this embodiment, the tube straightening portion 2000, the tube conveying portion 3000, the tube cutting portion 4000, the bent tube portion 5000 and the material returning portion 6000 are sequentially arranged on the rack 1000 along the length direction of the rack 1000, the bent tube portion 5000 includes a bending portion and a mold leaning portion which are sequentially arranged along the length direction of the rack 1000, the bending portion has a first position and a second position relative to the mold leaning portion, the bending portion can be arranged to move between the first position and the second position in a turnover manner, when the bending portion is located at the first position, the bending portion is turned over to the mold leaning portion to bend the tube, when the bending portion is located at the second position, the bending portion resets, the material returning portion 6000 is used for pushing the bent tube out of the bent tube portion 5000 when the bending portion is located at the first position, so that the U-shaped tube bending machine has functions of tube straightening, cutting, material returning and the like, and most requirements of users can be met.

The length direction, width direction, and height direction of the rack 1000 are shown by arrows X, Y and Z in FIG. 3, respectively.

Referring to fig. 4-7, in some embodiments of the present disclosure, the template portion includes a template clamping plate 5016, a beam plate 5001, a first sliding block 5003 and a first driving device 5012, the template clamping plate 5016 is fixed on the beam plate 5001, a template beam 5002 is fixedly connected below the beam plate 5001, an inclined long waist hole is formed in the middle of the template beam 5002, a cam bearing 5011 is nested in the long waist hole, the cam bearing 5011 is fixedly connected to the outer side of the upper portion of the first sliding block 5003, the first sliding block 5003 is connected to the first driving device 5012, the first sliding block 5003 is adjustable along the length direction of the rack 1000, guide rail brackets 5005 are arranged below two ends of the beam plate 5001, and the guide rail brackets 5005 and the template beam 5002 are slidably connected along the height direction of the rack 1000.

The utility model provides a first sliding block 5003 is removed along the length direction of frame 1000 to profiling portion through drive arrangement, cam bearing 5011 on the rethread first sliding block 5003 and the long waist hole cooperation transmission of slant on profiling crossbeam 5002 realize that profiling crossbeam 5002 removes along the length direction of frame 1000, thereby the height of profiling splint 5016 has been adjusted, it presss from both sides tightly to realize laminating between pipe fitting and the profiling splint 5016, and remove to change into vertical miniverum fine adjustment through horizontal big stroke, the adjustment accuracy has been improved, avoid the pipe fitting damage.

In some embodiments of the present application, the structure slidably connected in the mold portion along the length and height direction of the rack 1000 may be a sliding block, a sliding rail, a sliding chute, a roller, a sliding rod, or other various matching forms. The following takes the sliding block and the sliding rail to slide in a matching way as an example: first sliding block 5003 below is provided with first slide rail 5013, first sliding block 5003 and first slide rail 5013 slidable connection, and the inboard of rail bracket 5005 is provided with second slide rail 5014, and the end of crossbeam board 5001 is connected with slider connecting plate 5004, and slider connecting plate 5004 and second slide rail 5014 slidable connection.

Through the cooperation mode that adopts the slide rail slider, realize freely removing in the length of frame 1000 and ascending regulation of direction of height, the cooperation of slide rail and the direct joint of slider also can guarantee the stability of each part connected relation of profiling portion, avoids profiling portion function in-process to appear rocking, vibrations etc. influence the condition emergence of structure transmission and regulation precision.

In some embodiments of the present application, the first driving device 5012 can be a cylinder, a hydraulic cylinder, an electric telescopic rod, or a motor transmission device. In the following, an example is given in which the first driving device 5012 has a cylinder-type combination structure: including first cylinder, first cylinder seat 5006, first cylinder joint 5007 and first cylinder adapter 5008, first cylinder is fixed on first cylinder seat 5006, and first cylinder adapter 5008 is fixed on the power shaft of first cylinder, and first cylinder adapter 5008 links to each other with first cylinder joint 5007, and one side and the first cylinder joint 5007 fixed connection of first sliding block 5003.

In some embodiments of the present application, the explorator portion further includes a horizontal limiting device, the horizontal limiting device includes a first limiting seat 5009, a first limiting screw 5010 and a first nut 5015, the first limiting seat 5009 has a through hole along the length direction of the rack 1000, the first nut 5015 is fixed on one side of the through hole of the first limiting seat 5009, and the first limiting screw 5010 penetrates through the through hole and is connected with the first nut 5015.

Guarantee drive arrangement's effective stroke through horizontal stop device, can adjust the scope that profiling splint 5016 reciprocated along the direction of height, and avoid drive arrangement motion stroke too big to exceed the removal scope of profiling crossbeam 5002, lead to damaging drive arrangement and profiling portion itself. The rail bracket 5005, the first cylinder block 5006 and the first retainer block 5009 are fixedly connected to the frame 1000.

In some embodiments of the present application, the oblique angle of the oblique long waist holes is set in the range of 8 ° to 45 °. Considering that the stroke of the horizontal movement is larger than the vertical range, the fine adjustment of the height position of the cam plate 5016 can be realized only by controlling the inclination angle of the inclined long waist hole within 45 degrees as much as possible.

Further, the distance between the centers of the oblique long waist holes along the length direction of the rack 1000 is greater than or equal to the horizontal distance between the end of the first limit screw 5010 and the first cylinder joint 5007. Considering that the stroke range of the cylinder for propelling the telescopic motion is fixed, the horizontal limiting device is added to control the horizontal distance between the end part of the first limiting screw 5010 and the first cylinder joint 5007, so as to avoid the problem that the motion amplitude exceeds the stroke distance of the oblique long waist hole, which causes the failure of the driving device or the machine body.

Further, the cam bearing 5011 is rollably engaged in the inclined oblong hole. The advancing track of the cam bearing 5011 in the oblique long waist hole is fixed well through the position limitation of the cam bearing 5011 and the oblique long waist hole, so that the conditions that other parts of a die part of a moving collision machine of the cam bearing 5011 are separated or the like are avoided, the normal operation of equipment is influenced, and the processing precision cannot be guaranteed.

In some embodiments of the present application, the first sliding block 5003 is located inside the cam beam 5002, the first sliding block 5003 is provided with a first threaded hole, a first bolt 5017 is inserted into the first threaded hole, and the cam bearing 5011 is connected to the first sliding block 5003 through the first bolt 5017.

The first bolt 5017 is in threaded fit with the first sliding block 5003, so that the cam bearing 5011 is sleeved on the first bolt 5017, and the cam bearing 5011 can be rotatably and fixedly connected to the first sliding block 5003.

In some embodiments, a plurality of cam cleats 5016 are evenly distributed over the beam plate 5001, with semicircular grooves cut into the upper surface of the cam cleats 5016.

Further, the profiling clamping plate 5016 is detachably connected with the beam plate 5001 through a first bolt 5017, and the inner diameter of the semicircular groove is matched with the outer diameter of a machined pipe fitting.

Through, set up the semicircular groove that matches with processing pipe fitting size on profiling splint 5016, be favorable to fixing the pipe fitting position better, can dismantle the setting with profiling splint 5016 crossbeam board 5001 in addition, can realize the replacement of the profiling splint 5016 of different specifications to can realize bending simultaneously to the pipe fitting of different sizes and process.

The working principle of the die backing part in the embodiment of the application is as follows: the first cylinder drives the first cylinder joint 5007 to move along the length direction of the rack 1000 to drive the first sliding block 5003 to horizontally move on the first sliding rail 5013, so that a cam bearing 5011 fixed on the first sliding block 5003 moves in the oblique long waist hole, because a sliding block connecting plate 5004 connected with the profiling beam 5002 and a fixedly arranged guide rail bracket 5005 are in sliding connection on the second sliding rail 5014, the cam bearing 5011 props against the oblique long waist hole in the horizontal movement process, the profiling beam 5002 cannot horizontally move due to the limitation of the guide rail bracket 5005, the up-and-down movement of the profiling beam 5002 is realized under the assistance of the oblique long waist hole, meanwhile, the horizontal movement amplitude of the cam bearing 5011 is larger than the up-and-down movement amplitude of the oblique long waist hole, the fine adjustment of a profiling clamping plate 5016 on the profiling beam 5002 in the height direction is realized, and the joint clamping and the precise adjustment between a pipe fitting and the profiling clamping plate 5016 are realized, and effectively avoid the pipe fitting damage.

Referring to fig. 8, in some embodiments of the present application, the bending portion includes a first rotating shaft 5025 rotatably disposed on the rack 1000, a bending mechanism is fixedly connected to the first rotating shaft 5025, the bending mechanism includes a first bending clamping plate 5026 and a second bending clamping plate 5027 which are oppositely disposed, the bending mechanism further includes a first linear driver 5100, and a driving rod of the first linear driver 5100 is drivingly connected to the second bending clamping plate 5027 to drive the second bending clamping plate 5027 to move toward or away from the first bending clamping plate 5026; the bending portion further comprises a second driving device, and the second driving device is in driving connection with the first rotating shaft 5025 to drive the first rotating shaft 5025 to rotate.

In this embodiment, the driving rod of the first linear driver 5100 is in driving connection with the second bending clamping plate 5027 to drive the second bending clamping plate 5027 to move towards the direction close to or away from the first bending clamping plate 5026, so as to clamp or release the tubing by the first bending clamping plate 5026 and the second bending clamping plate 5027, specifically: when the driving rod of the first linear driver 5100 drives the second bending clamping plate 5027 to move towards the direction close to the first bending clamping plate 5026, the first bending clamping plate 5026 and the second bending clamping plate 5027 clamp the pipe; the driving rod of the first linear driver 5100 drives the second bending clamping plate 5027 to move in the direction away from the first bending clamping plate 5026, so that the first bending clamping plate 5026 and the second bending clamping plate 5027 release the pipe.

The first bending splint 5026 is fixedly connected with the first linear driver 5100 through a first connecting beam, the first rotating shaft 5025 is fixedly arranged at one end of the first bending splint 5026 in a penetrating mode, the first rotating shaft 5025 is driven to rotate through the second driving device, and therefore the bending portion can rotate between the first position and the second position.

Further, a plurality of bending mechanisms are fixedly connected to the first rotating shaft 5025, and the bending mechanisms are sequentially arranged in the axial direction of the first rotating shaft 5025 and are arranged in one-to-one correspondence with the plurality of explorator clamping plates 5016. A first bending die holder is arranged between two adjacent second bending clamp plates 5027, the first bending die holder is fixedly connected with the first connecting beam, and the first bending die holder can be plate-shaped or block-shaped.

Further, the second driving device includes a servo motor 5018, a speed reducer 5019, a third driving belt 5020, a transmission shaft 5021, a first chain wheel 5022, a second chain wheel 5023, and a composite chain 5024, the servo motor 5018 is connected to the speed reducer 5019 through the third driving belt 5020, the speed reducer 5019 is connected to the first chain wheel 5022 through the transmission shaft 5021, the first chain wheel 5022 is connected to the second chain wheel 5023 through the composite chain 5024, and the second chain wheel 5023 is in transmission connection with the first rotating shaft 5025 to drive the first rotating shaft 5025 to rotate.

Further, the opposite side surfaces of the first bending clamping plate 5026 are provided with semicircular grooves, and the top surface of the second bending clamping plate 5027 is also provided with semicircular grooves, so that the positions of the pipe fittings can be fixed better. The semi-circular grooves on the second bending clamp plate 5027 are aligned with the semi-circular grooves on the cam clamp plate 5016 so that tubing passes through the tubing channel formed by the semi-circular grooves on the second bending clamp plate 5027 and the semi-circular grooves on the first bending clamp plate 5026.

Further, the portion of bending still includes and is located the mechanism of bending and keeps away from profiling portion one side guide portion, and the guide portion includes the direction bracing piece 5028 that sets up with every tubular product passageway one-to-one, and direction bracing piece 5028 sets up with the tubular product passageway is coaxial to tubular product passageway is passed tubular product passageway and is reachd material returned portion 6000. It should be understood that the pipe cutting section 4000 performs the cutting process on the pipe when the pipe passes through the pipe passage and reaches the material discharge section 6000.

When the bending part is located at the first position, the bending part is integrally turned over to the profiling part, and a discharge opening is formed between the pipe cutting part 4000 and the profiling part. The material returning part 6000 moves by pushing the pipe material toward the cutting part to drop the pipe material out of the bending part and from the discharge opening. The pipe cutting-off portion 4000 includes a cutter head having a cutting position for cutting off the pipe and an avoidance position for avoiding the pipe, and the cutter head is movable between the cutting position and the avoidance position. The material returning part 6000 comprises a screw rod transmission mechanism and a material pushing sleeve 6001 fixedly connected to a screw rod nut, and the screw rod transmission mechanism can drive the material pushing sleeve 6001 to reciprocate along the length direction of the rack 1000. When the screw rod transmission mechanism drives the material pushing sleeve 6001 to move along the portion close to the bent portion, the material pushing sleeve 6001 can be used for pushing out the pipe in the bent portion.

Referring to fig. 9-11, in some embodiments of the present application, the first linear actuator 5100 includes a second cylinder including a second cylinder block 5110 and a second drive rod 5120, and the first linear actuator 5100 further includes a force increasing device including:

the first mounting seat 5210 is fixedly connected to the second cylinder block 5110, a mounting cavity 5211 penetrating the first mounting seat 5210 is formed in the first mounting seat 5210, and the second driving rod 5120 is inserted into the mounting cavity 5211;

the push rod 5220, the push rod 5220 is located in the mounting cavity 5211 and is fixedly connected with the second driving rod 5120, and the push rod 5220 has a push section 5221;

a force rod 5230, the force rod 5230 having a first end 5231 and a second end 5232, the first end 5231 being located within the mounting cavity 5211 and the second end 5232 extending out of the mounting cavity 5211, the force rod 5230 being axially movably disposed relative to the first mounting seat 5210;

the first driving members are located in the installation cavity 5211 and surround the pushing section 5221, at least part of the first driving members is located on the end surface of the first end 5231, and the pushing section 5221 is in abutting fit with the first driving members to drive the first driving members to move towards the output rod 5230.

The mounting cavity 5211 of the first mounting seat 5210 extends through the first mounting seat 5210 in the axial direction of the second drive rod 5120, and the second drive rod 5120 is inserted into the mounting cavity 5211. The push rod 5220 is fixedly mounted on the portion of the second driving rod 5120 located in the mounting cavity 5211, and the push rod 5220 can move synchronously with the second driving rod 5120 in the mounting cavity 5211. The pushing member has a pushing section 5221, and a plurality of first driving members are circumferentially arranged around the pushing section 5221 at intervals. The first drive member is located at an end of the output rod 5230 adjacent to the second drive rod 5120 and is at least partially in contact with an end face of the first end 5231 of the output rod 5230. When the pushing rod 5220 moves along the second driving rod 5120 toward the output rod 5230, the pushing section 5221 is abutted against and engaged with the plurality of first driving members to drive the plurality of first driving members to move toward the output rod 5230. The first driving member pushes the output rod 5230 to move away from the second driving rod 5120 during the movement. The acting forces of the first driving pieces act on the force output rod 5230, so that the acting force output by the force output rod 5230 is multiple times of the output force of the cylinder, the purpose of improving the output force of the cylinder is achieved, and the operation precision of the pipe bender is improved. The cylinder stroke can be 20mm, and the acting force output by the output rod 5230 can be 7.1 times of the force output by the second driving rod 5120 at most.

The second driving rod 5120, the ejector rod 5220 and the output rod 5230 are coaxially disposed, and the first driving member is a rigid ball 5240. One end of the pushing member close to the second driving rod 5120 is fixedly sleeved on the second driving rod 5120 so that the second driving rod 5120 is fixedly connected with the pushing member. The first linear actuator 5100 is drivingly connected to the second bending pinch plate 5027 via a force bar 5230.

It should be appreciated that the first driving member also contacts the sidewall of the mounting cavity 5211 when in pushing engagement with the pushing section 5221 to prevent the first driving member from separating from the pushing section 5221.

In some embodiments of the present application, the outer circumferential surface of the pushing section 5221 is a conical surface, and the small-diameter end is close to the output rod 5230. With such an arrangement, not only the pushing section 5221 can be conveniently machined, but also the contact area between the pushing section 5221 and the rigid ball 5240 can be reduced, thereby reducing the wear of the pushing section 5221 and the rigid ball 5240.

In some embodiments of the present application, the first end 5231 is provided with an outwardly extending retaining ring 5233, and the first driving member is in contact with the retaining ring 5233; the booster further includes a first elastic member 5250 located in the mounting cavity 5211, the first elastic member 5250 is sleeved on the output rod 5230, and one end of the first elastic member 5250 is in contact with the bottom surface of the limiting ring 5233 and the other end is in contact with the cavity wall of the mounting cavity 5211.

In this embodiment, the first mount 5210 has a bottom wall 5214, and the second end 5232 of the force rod 5230 passes through the bottom wall 5214. A first groove portion 5215 is concavely formed on the top surface of the bottom wall 5214, the position-limiting ring 5233 is positioned in the first groove portion 5215, and the shape of the first groove portion 5215 is matched with that of the position-limiting ring 5233. The bottom wall 5214 is provided with a second groove portion 5216, the second groove portion 5216 is located below the first groove portion 5215, and an inner cavity of the second groove portion 5216 is communicated with an inner cavity of the first groove portion 5215. The first elastic member 5250 is, for example, but not limited to, a spring. The spring is located in the second groove portion 5216 and sleeved on the force rod 5230. One end of the spring is in contact with the bottom surface of the retainer ring 5233, and the other end is in contact with the bottom wall 5214 of the second groove portion 5216 to provide an elastic force for restoring the position of the retainer ring 5233.

In some embodiments of the present application, the retainer ring 5233 has a first end 5231 surface adjacent to the first driving member, the first end 5231 surface is recessed with a plurality of guide slots extending in a radial direction of the output rod 5230, and the plurality of first driving members are respectively located in the plurality of guide slots.

In this embodiment, the plurality of first drivers are respectively located in the plurality of guide grooves, and the guide grooves are used for guiding the first drivers to guide the first drivers to move along the radial direction of the output rod 5230, so as to prevent the first drivers from moving along the circumference of the output rod 5230.

In some embodiments of the present application, the guide groove is disposed obliquely, and an end of the guide groove away from the axis of the output rod 5230 is higher than an end close to the axis of the output rod 5230. So configured, the rigid ball 5240 can be made to return to its original position upon actuation of the output rod 5230.

In some embodiments of the present application, the output rod 5230 is a hollow structure, a limit block 5260 is disposed in an inner cavity of the output rod 5230, one end of the ejector rod 5220, which is away from the cylinder block, is movably inserted into the inner cavity of the output rod 5230 and connected to the limit block 5260, a stop protrusion 5234 is disposed in the inner cavity of the output rod 5230, the stop protrusion 5234 is located on one side of the limit block 5260, which is close to the second driving rod 5120, and the stop protrusion 5234 is configured to cooperate with the limit block 5260 to limit the movement of the limit block 5260.

In this embodiment, when the ejector rod 5220 moves along with the second driving rod 5120 toward the output rod 5230, the ejector rod 5220 drives the limiting block 5260 to move synchronously in the inner cavity of the output rod 5230. When the ejector rod 5220 moves with the second driving rod 5120 in a direction away from the output rod 5230, the ejector rod 5220 drives the limiting block 5260 to move synchronously in the inner cavity of the output rod 5230. It should be understood that, under normal operation of the first elastic member 5250, the stop block 5260 is not in contact with the stop protrusion 5234; when the first elastic member 5250 fails to provide elastic force to the force-releasing rod 5230, the push-push rod 5220 can be pushed by the stop block 5260 to engage with the stop protrusion 5234 to drive the force-releasing rod 5230 to return to its original position.

The stop protrusion 5234 is a ring-shaped structure. The limiting block 5260 and the force bar 5230 can be fixedly connected through bolts.

In some embodiments of the present application, the first mounting block 5210 comprises a first mounting block 5212 and a second mounting block 5213 arranged along the axis of the second drive rod 5120. The first mounting seat 5212 and the second cylinder block 5110 can be fixedly connected by bolts, and the first mounting seat 5212 and the second mounting seat 5213 can also be fixedly connected by bolts. The mounting cavity 5211 is located in the first mounting seat 5212 and the second mounting seat 5213, and the first driving element, the first elastic element 5250 and the output rod 5230 are all disposed on the second mounting seat 5213. The arrangement is convenient for the production and installation of the force increasing device.

Referring to fig. 15-19, in some embodiments of the present application, a tube straightening portion 2000 includes a straightening assembly 2200 disposed on a rack 1000, a straightening channel is formed in the straightening assembly 2200, the straightening assembly 2200 includes a first straightening portion 2100, a second straightening portion 2220, and a third straightening portion 2230 sequentially disposed along a length direction of the rack 1000, the first straightening portion 2100 includes at least one pair of first straightening wheels 2211, the second straightening portion 2220 includes at least one pair of second straightening wheels 2221, the third straightening portion 2230 includes at least one pair of third straightening wheels 2231, an axial direction of the first straightening wheel 2211 is perpendicular to an axial direction of the second straightening wheel 2221, an axial direction of the first straightening wheel 2211 is parallel to an axial direction of the third straightening wheel 2231, and annular straightening grooves 2240 are disposed on outer circumferential surfaces of the first straightening wheel 2211, the second straightening wheel 2221, and the third straightening wheel 2231.

In this embodiment, a straightening channel through which the pipe passes is formed in the straightening assembly 2200, and the straightening assembly 2200 straightens the pipe located in the straightening channel. Alignment assembly 2200 includes a first alignment portion 2100, a second alignment portion 2220, and a third alignment portion 2230 disposed in sequence along the length of the chassis 1000. The first straightening portion 2100, the second straightening portion 2220 and the third straightening portion 2230 all straighten the tube. First alignment portion 2100 includes at least one pair of first alignment wheels 2211, second alignment portion 2220 includes at least one pair of second alignment wheels 2221, and third alignment portion 2230 includes at least one pair of third alignment wheels 2231, wherein an axial direction of first alignment wheel 2211 is perpendicular to an axial direction of second alignment wheel 2221, and an axial direction of first alignment wheel 2211 is parallel to an axial direction of third alignment wheel 2231, such that second alignment portion 2220 is aligned in a different direction than first alignment portion 2100 and second alignment portion 2220, respectively, and first alignment portion 2100 and third alignment portion 2230 are aligned in the same direction. Annular straightening grooves 2240 are formed in the outer peripheral surfaces of first straightening wheel 2211, second straightening wheel 2221 and third straightening wheel 2231, and straightening channels are formed by the straightening wheels in first straightening portion 2100, second straightening portion 2220 and third straightening portion 2230 through straightening grooves 2240.

Based on the perspective shown in fig. 17, the axial directions of first straightening wheel 2211 and second straightening wheel 2221 are vertically arranged and the axial directions of second straightening wheel 2221 are parallel arranged. Of course, in other embodiments, the orientations of first alignment portion 2100 and second alignment portion 2220 may be interchanged.

In some embodiments of the present application, second alignment portion 2220 includes a plurality of pairs of second alignment wheels 2221 and third alignment portion 2230 includes a plurality of pairs of third alignment wheels 2231.

In the present application, a plurality of pairs of second straightening wheels 2221 are provided in the second straightening portion 2220, and the plurality of pairs of second straightening wheels 2221 are arranged at intervals in the longitudinal direction of the frame 1000. A plurality of pairs of third straightening wheels 2231 are disposed in the third straightening portion 2230, and a plurality of pairs of first straightening wheels 2211 are arranged at intervals along the length direction of the rack 1000. It should be understood that in the second straightening portion 2220, there may be one second straightening wheel 2221 in each adjacent pair of second straightening wheels 2221, and so may be the third straightening portion 2230. Of course, a plurality of pairs of first alignment wheels 2211 may also be provided in first alignment portion 2100.

When the second straightening portion 2220 and the third straightening portion 2230 are arranged in this way, the straightening processing area of the pipe material by the second straightening portion 2220 and the third straightening portion 2230 can be enlarged, and the straightening accuracy of the pipe material by the second straightening portion 2220 and the third straightening portion 2230 can be further improved.

The frame 1000 is further provided with a mounting plate 2330, and the mounting plate 2330 is positioned at one side of the second collimating part 2220 to mount the second collimating wheel 2221 in the second collimating part 2220 thereon.

Further, two first straightening wheels 2211 of each pair are arranged in a staggered manner, and two third straightening wheels 2231 of each pair are arranged in a staggered manner.

Further, in the second collimating part 2220, the axes of the first pair of second collimating wheels 2221 and the last pair of second collimating wheels 2221 in the lengthwise direction of the frame 1000 are located in the same vertical plane. The two second straightening wheels 2221 of the remaining pairs are arranged offset from each other.

In some embodiments of the present application, the alignment apparatus further includes a first guiding element 2300, the first guiding element 2300 is disposed on the frame 1000 and located on a side of the first alignment portion 2100 away from the second alignment portion 2220, a first guiding hole 2310 is disposed on the first guiding element 2300 in a penetrating manner, and the first guiding hole 2310 corresponds to a feeding hole of the alignment passage.

In this embodiment, the first guide 2300 may have a plate-shaped structure. The first guide member 2300 is provided with a first guide hole 2310 penetrating the first guide member 2300. The first guiding hole 2310 is arranged corresponding to the feeding hole of the straightening channel, i.e. the first guiding hole 2310 is arranged coaxially with the straightening channel. First guiding hole 2310 is used for leading-in the feed inlet of alignment passageway with tubular product, also can carry out preliminary alignment to tubular product simultaneously.

In some embodiments of the present application, the end of first guide bore 2310 distal from first alignment portion 2100 is a flared end 2311. With such an arrangement, the aperture of the feeding hole of the first guide hole 2310 is relatively large, so that an operator can insert the bent pipe into the first guide hole 2310 conveniently. The inner side surface of the flared end 2311 is a conical surface, and the pipe which can be guided to enter the feeding hole of the first guide hole 2310 can move towards the discharging hole of the first guide hole 2310.

In some embodiments of the present application, alignment assembly 2200 further includes a second guide 2320, wherein second guide 2320 is disposed between first alignment portion 2100 and second alignment portion 2220, and second guide 2320 is provided with a second guide aperture 2321, and the alignment passage passes through second guide aperture 2321. With this arrangement, the tube passing through the second guide hole 2321 can be supported to prevent the tube from bending and deforming between the first and second straightening portions 2100 and 2220. The feed inlet of the second guiding hole 2321 is also of a flaring structure so as to facilitate the tube material entering the second guiding hole 2321.

In some embodiments of the present application, the alignment apparatus may include a plurality of alignment assemblies 2200, and the plurality of alignment assemblies 2200 may be arranged side by side in a direction perpendicular to the length direction of the rack 1000. In two adjacent alignment assemblies 2200, a common first alignment wheel 2211 may be present between two first alignment portions 2100 and a common third alignment wheel 2231 may be present between two third alignment portions 2230 to reduce the cost and bulk of the alignment apparatus.

A plurality of first guides 2300 of the plurality of alignment assemblies 2200 may be integrally formed, and a plurality of second guides 2320 of the plurality of alignment assemblies 2200 may also be integrally formed.

In some embodiments of the present application, a cover plate 2340 is disposed above the second aligning portion 2220 and the third aligning portion 2230, and the cover plate 2340 is fixedly connected to the frame 1000. So configured, the cover plate 2340 may cover the second straightening portion 2220 and the third straightening portion 2230 to prevent impurities from falling into the second straightening portion 2220 and the third straightening portion 2230.

Referring to fig. 12 to 14, in some embodiments of the present application, the tube conveying portion 3000 includes a continuous feeding mechanism disposed on the frame 1000, the continuous feeding mechanism includes a first belt transmission mechanism 3200 and a second belt transmission mechanism 3300, the first belt transmission mechanism 3200 includes a first transmission belt 3210, the second belt transmission mechanism 3300 includes a second transmission belt 3310, the first transmission belt 3210 and the second transmission belt 3310 are disposed adjacent to each other, annular accommodating grooves 3201 are recessed on outer circumferential surfaces of the first transmission belt 3210 and the second transmission belt 3310, the two accommodating grooves 3201 together form a feeding channel 3202, the continuous feeding mechanism further includes a belt pressing mechanism, the belt pressing mechanism includes a second driving member and a belt pressing member, a portion of the belt pressing member is located in a cavity surrounded by the first transmission belt 3210, and the second driving member is drivingly connected to the belt pressing member to drive the belt pressing member to move in a direction close to or far away from the feeding channel 3202.

In this embodiment, the first belt driving mechanism 3200 and the second belt driving mechanism 3300 are both installed on the rack 1000, and the first belt driving mechanism 3200 may be located above the second belt driving mechanism 3300. Annular accommodating grooves 3201 are respectively and concavely formed on the outer peripheral surfaces of the first transmission belt 3210 and the second transmission belt 3310, and the two accommodating grooves 3201 form a feeding channel 3202 together. The belt pressing mechanism further comprises a second driving piece and a belt pressing piece. Because a part of the belt pressing member is located in the cavity surrounded by the first transmission belt 3210, when the second driving member is drivingly connected with the belt pressing member to drive the belt pressing member to move in a direction close to the feeding channel 3202, the belt pressing member can apply a pressing force to the part of the first transmission belt 3210 forming the feeding channel 3202, so that the first transmission belt 3210 and the second transmission belt 3310 have a large clamping force on the pipe located in the feeding channel 3202, and at this time, the pipe can synchronously move along with the belts in the feeding channel 3202, thereby achieving the purpose of continuous feeding when the first transmission belt 3210 and the second transmission belt 3310 rotate in opposite directions. When the second driving member drives the pressing belt member to move in a direction away from the feeding channel 3202, the clamping force of the first driving belt 3210 and the second driving belt 3310 on the tube located in the feeding channel 3202 is smaller, and the tube is in a released state.

In some embodiments of the present application, the second driving element includes a second mounting seat 3410 and a second linear actuator 3420, the second mounting seat 3410 is fixedly connected to the machine frame 1000, the second linear actuator 3420 is fixedly connected to the second mounting seat 3410, the second driving element further includes a guide post 3430 and a second elastic member 3440, the guide post 3430 has a third end and a fourth end, the third end movably penetrates through the second mounting seat 3410 and is fixedly connected to the belt pressing member, the fourth end is provided with a flange portion 3431, the second elastic member 3440 is sleeved on the guide post 3430 and is located between the flange portion 3431 and the second mounting seat 3410, and the second linear actuator 3420 is in driving engagement with the belt pressing member to drive the belt pressing member to move in a direction close to the feeding channel 3202.

In this embodiment, the second mounting seat 3410 is disposed at the top of the frame 1000, the second linear actuator 3420 and the guide post 3430 are mounted on the second mounting seat 3410, a third end of the guide post 3430 passes through the second mounting seat 3410 and is fixedly connected to the belt pressing member to guide the belt pressing member, and a guiding direction of the guide post 3430 is a height direction of the continuous feeding device. The fourth end is provided with a flange portion 3431, the second elastic element 3440 is sleeved on the guide post 3430 and located between the flange portion 3431 and the second mounting seat 3410, and two ends of the second elastic element 3440 are respectively contacted with the flange portion 3431 and the second mounting seat 3410. When the second linear actuator 3420 is in driving engagement with the belt pressing member to drive the belt pressing member to move in a direction close to the feeding passage 3202, the second elastic member 3440 is in a compressed state; when the driving rod of the second linear driver 3420 is retracted to the initial position, the second elastic member 3440 provides elastic force to the flange portion 3431 of the guide member to drive the platen upward. The second linear actuator 3420 is, for example, but not limited to, an air cylinder or the like.

The number of the guide posts 3430 may be 1 or more, and the second elastic member 3440 is, for example, a spring.

In some embodiments of the present application, the belt pressing member includes a belt pressing block 3510, a first connecting plate 3520 and a second connecting plate 3530, the belt pressing block 3510 is located in a cavity defined by the first transmission belt 3210, the second connecting plate 3530 is located on a side of the first transmission belt 3210 close to the second mounting seat 3410, the belt pressing block and the second connecting plate 3530 are fixedly connected by the first connecting plate 3520, the first connecting plate 3520 is located between the first transmission belt 3210 and the frame 1000, the fourth end is fixedly connected to the second connecting plate 3530, and the second linear actuator 3420 is in driving engagement with the second connecting plate 3530.

In this embodiment, the fourth end of the guiding column 3430 is fixedly connected to the second connecting plate 3530, the second connecting plate 3530 is fixedly connected to the first connecting plate 3520, and one end of the first connecting plate 3520, which is far away from the second connecting plate 3530, is located between the first transmission belt 3210 and the frame 1000 and is fixedly connected to the belt pressing block 3510. When the driving rod of the air cylinder drives the second connecting plate 3530 to move downward toward the first transmission belt 3210, the first connecting plate 3520 and the belt pressing block 3510 both move synchronously until the belt pressing block 3510 presses the first transmission belt 3210. In order to avoid interference between the first connecting plate 3520 and the first transmission belt 3210, an avoiding groove is recessed in a side of the first connecting plate 3520 close to the first transmission belt 3210.

In some embodiments of the present application, the rack further includes a limiting plate 3540, the limiting plate 3540 is located in the cavity surrounded by the first transmission belt 3210, the limiting plate 3540 is detachably and fixedly connected to the rack 1000, a limiting cavity is formed between the limiting plate 3540 and the rack 1000, the first connecting plate 3520 is partially located in the limiting cavity, and the shape of the limiting cavity matches with the shape of the portion of the first connecting plate 3520 located in the limiting cavity. So set up, can make limiting plate 3540 carry on spacingly to first connecting plate 3520, avoid first connecting plate 3520 to take place the position deviation in the direction of following the perpendicular to height, and then ensure to press the crimping area between area block 3510 and the first drive belt 3210.

In some embodiments of the present application, a support plate 3550 is further included, the support plate 3550 is disposed in the cavity defined by the second transmission belt 3310 and adjacent to the feeding passage 3202, and the support plate 3550 is in supporting engagement with a portion of the second transmission belt 3310 between the support plate 3550 and the feeding passage 3202.

In this embodiment, the supporting plate 3550 is used to support the second driving belt 3310, and particularly, to support and cooperate with a portion of the second driving belt 3310 located between the supporting plate 3550 and the feeding channel 3202, so as to prevent the feeding channel 3202 from bending and deforming downwards under the pressing of the belt pressing block 3510, and further ensure the flatness of the feeding channel 3202.

In some embodiments of the present application, the first belt drive 3200 includes a first drive pulley 3220 and a first driven pulley 3230, and the second belt drive 3300 includes a second drive pulley 3320 and a second driven pulley 3330, the first driven pulley 3230 being movably disposed in a direction approaching or moving away from the first drive pulley 3220, and the second driven pulley 3330 being movably disposed in a direction approaching or moving away from the second drive pulley 3320. So set up, can adjust the elasticity of the driving belt in first belt drive 3200 and the second belt drive 3300, and then steerable feeding channel 3202's dimensional accuracy.

In some embodiments of the present application, a first wheel shaft 3240 is mounted on the first driven pulley 3230, a first through slot 3111 for the first wheel shaft 3240 to move is disposed on the rack 1000, a third mounting seat 3600 is fixedly connected to the rack 1000, a first screw 3620 is mounted on the third mounting seat 3600, the first screw 3620 movably passes through the third mounting seat 3600 and is screwed with the first wheel shaft 3240, and a second nut 3640 is screwed between a head of the first screw 3620 and the third mounting seat 3600;

a second wheel shaft 3340 is mounted on the second driven pulley 3330, a second through groove 3112 for the second wheel shaft 3340 to move is arranged on the rack 1000, a fourth mounting seat 3610 is fixedly connected to the rack 1000, a second screw 3630 is mounted on the fourth mounting seat 3610, the second screw 3630 movably penetrates through the fourth mounting seat 3610 and is in threaded connection with the second wheel shaft 3340, and a third nut 3650 is in threaded connection between the head of the second screw 3630 and the fourth mounting seat 3610.

In this embodiment, the first driving pulley 3220 of the first belt driving mechanism 3200 is mounted on the frame 1000 through the third axle 3250, and the second driving pulley 3320 of the second belt driving mechanism 3300 is mounted on the frame 1000 through the fourth axle 3350. The first driven pulley 3230 of the first belt driving mechanism 3200 has a first axle 3240 mounted thereon, and the second driven pulley 3330 has a second axle 3340 mounted thereon, wherein the first axle 3240 is movable in the first through groove 3111 in a direction away from or toward the third axle 3250, and the second axle 3340 is movable in the second through groove 3112 in a direction away from or toward the fourth axle 3350, so as to adjust the tightness of the first and

second driving belts

3210 and 3310. First logical groove 3111 and second logical groove 3112 all set up on curb plate 3110 and be U type groove.

A third mounting seat 3600 is fixedly connected to the frame 1000, a first screw 3620 is mounted on the third mounting seat 3600, the first screw 3620 movably penetrates through the third mounting seat 3600 and is in threaded connection with the first wheel shaft 3240, a second nut 3640 is in threaded connection between the rod head of the first screw 3620 and the third mounting seat 3600, and the distance between the first wheel shaft 3240 and the third wheel shaft 3250 can be adjusted by rotating the second nut 3640. Similarly, a fourth mounting seat 3610 is fixedly connected to the rack 1000, a second screw 3630 is mounted on the fourth mounting seat 3610, the second screw 3630 movably penetrates through the third mounting seat 3600 and is in threaded connection with the second wheel shaft 3340, a third nut 3650 is in threaded connection between the head of the second screw 3630 and the fourth mounting seat 3610, and the distance between the second wheel shaft 3340 and the fourth wheel shaft 3350 can be adjusted by rotating the third nut 3650. The adjusting device for the tightness of the transmission belt provided by the embodiment is simple in structure and easy to operate.

The third shaft 3250 and the fourth shaft 3350 are driven by a gear transmission mechanism, so that the transmission rates of the first belt transmission mechanism 3200 and the second belt transmission mechanism 3300 are consistent. It should be appreciated that the first and second

belt drive mechanisms

3200, 3300 rotate in opposite directions.

Up to this point, the present embodiment has been described in detail with reference to the accompanying drawings. From the above description, one skilled in the art should clearly recognize the present application.

It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Furthermore, the above definitions of the various elements and methods are not limited to the specific structures, shapes, or configurations shown in the examples.

It is also noted that the illustrations herein may provide examples of parameters that include particular values, but that these parameters need not be exactly equal to the corresponding values, but may be approximated to the corresponding values within acceptable error tolerances or design constraints. Directional phrases used in the embodiments, such as those referring to "upper", "lower", "front", "rear", "left", "right", etc., refer only to the orientation of the attached drawings and are not intended to limit the scope of the present application. In addition, unless steps are specifically described or must occur in sequence, the order of the steps is not limited to that listed above and may be changed or rearranged as desired by the desired design. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.

The above embodiments are further described in detail for the purpose of illustrating the invention, and it should be understood that the above embodiments are only for illustrative purposes and are not to be construed as limiting the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present application.

Claims

1. The utility model provides a U type bending machine, its characterized in that, includes the frame and follows the length direction of frame set gradually in tubular product alignment portion, tubular product conveying portion, tubular product cutting off portion, curved pipe portion and material returned portion in the frame, the curved pipe portion includes the edge the length direction of frame set gradually the portion of bending with lean on mould portion, it is relative to bend the portion lean on mould portion to have primary importance and second place, bend the portion can set up with overturning and move between primary importance and the second place, work as the portion of bending is located during the primary importance, the portion of bending overturn extremely lean on mould portion go up in order to bend to the tubular product, work as the portion of bending is located during the second place, the portion of bending resets, material returned portion is used for the portion of bending is located tubular product after will bending during the primary importance is followed the curved pipe portion releases.

2. The U-shaped pipe bending machine according to claim 1, wherein the die rest portion includes a die clamp plate, a beam plate, a first slide block and a first driving device, the die clamp plate is fixed on the beam plate, a die cross beam is fixedly connected below the beam plate, an inclined long waist hole is formed in the middle of the die cross beam, a cam bearing is nested in the long waist hole, the cam bearing is fixedly connected to the outer side of the upper portion of the first slide block, the first slide block is connected with the first driving device, the first slide block is adjustable along the length direction of the machine frame, rail brackets are arranged below two ends of the beam plate, and the rail brackets are slidably connected with the die cross beam along the height direction of the machine frame.

3. The U-shaped pipe bender according to claim 2, wherein the mold portion further comprises a horizontal position-limiting device, the horizontal position-limiting device comprises a first position-limiting seat, a first position-limiting screw and a first nut, the first position-limiting seat is provided with a through hole along the length direction of the frame, the first nut is fixed on one side of the through hole of the first position-limiting seat, and the first position-limiting screw penetrates through the through hole and is connected with the first nut.

4. The U-shaped pipe bender according to claim 2 or 3, wherein the inclined angle of the inclined long waist hole is set in the range of 8-45 °.

5. The U-shaped pipe bending machine according to claim 1 or 2, wherein the bending portion comprises a first rotating shaft rotatably disposed on the frame, a bending mechanism is fixedly connected to the first rotating shaft, the bending mechanism comprises a first bending clamping plate and a second bending clamping plate which are oppositely disposed, the bending mechanism further comprises a first linear driver, and a driving rod of the first linear driver is in driving connection with the second bending clamping plate to drive the second bending clamping plate to move towards or away from the first bending clamping plate; the bending part further comprises a second driving device, and the second driving device is in driving connection with the first rotating shaft to drive the first rotating shaft to rotate.

6. A U-shaped bender according to claim 5, wherein said first linear actuator comprises a second cylinder, said second cylinder including a second cylinder block and a second actuating rod, said first linear actuator further comprising a force-increasing device, said force-increasing device comprising:

the output rod is provided with a first end and a second end, the first end is located in the installation cavity, the second end extends out of the installation cavity, and the output rod is movably arranged relative to the first installation seat along the axial direction;

the first driving pieces are located in the installation cavity and surround the pushing section, at least part of the first driving pieces are located on the end face of the first end, and the pushing section is matched with the first driving pieces in an abutting mode to drive the first driving pieces to move towards the output rod.

7. The U-shaped bender according to claim 6, wherein said first end is provided with a stop ring extending outwardly therefrom, said first driving member contacting said stop ring; the force boosting device further comprises a first elastic piece located in the installation cavity, the first elastic piece is sleeved on the force output rod, one end of the first elastic piece is in contact with the bottom surface of the limiting ring, and the other end of the first elastic piece is in contact with the cavity wall of the installation cavity.

8. The U-shaped pipe bender according to claim 1, wherein the pipe straightening portion includes a straightening assembly disposed on the frame, a straightening channel is formed in the straightening assembly, the straightening assembly includes a first straightening portion, a second straightening portion and a third straightening portion sequentially disposed along a length direction of the frame, the first straightening portion includes at least one pair of first straightening wheels, the second straightening portion includes at least one pair of second straightening wheels, the third straightening portion includes at least one pair of third straightening wheels, an axial direction of the first straightening wheels is perpendicular to an axial direction of the second straightening wheels, an axial direction of the first straightening wheels is parallel to an axial direction of the third straightening wheels, and annular straightening grooves are disposed on outer circumferential surfaces of the first straightening wheels, the second straightening wheels and the third straightening wheels.

9. The U-shaped pipe bending machine according to claim 1, 7 or 8, wherein the pipe conveying portion comprises a continuous feeding mechanism disposed on the frame, the continuous feeding mechanism comprises a first belt transmission mechanism and a second belt transmission mechanism, the first belt transmission mechanism comprises a first transmission belt, the second belt transmission mechanism comprises a second transmission belt, the first transmission belt and the second transmission belt are disposed adjacently, annular accommodating grooves are recessed in outer circumferential surfaces of the first transmission belt and the second transmission belt, the two accommodating grooves form a feeding channel together, the continuous feeding mechanism further comprises a belt pressing mechanism, the belt pressing mechanism comprises a second driving member and a belt pressing member, a part of the belt pressing member is located in a cavity surrounded by the first transmission belt, and the second driving member is in driving connection with the belt pressing member to drive the belt pressing member to approach or leave the feeding channel Is moved.

10. The U-shaped bender according to claim 9, wherein said second driving member includes a second mounting seat and a second linear actuator, said second mounting seat is fixedly connected to said frame, said second linear actuator is fixedly connected to said second mounting seat, said second driving member further includes a guiding post and a second elastic member, said guiding post has a third end and a fourth end, said third end movably passes through said second mounting seat and is fixedly connected to said press belt, said fourth end has a flange portion, said second elastic member is sleeved on said guiding post and is located between said flange portion and said second mounting seat, said second linear actuator is in driving engagement with said press belt to drive said press belt to move in a direction close to said feeding channel.