CN107716758B - Flexible feeding device of pipe bending machine and pipe bending machine thereof - Google Patents

Abstract

The utility model discloses a flexible feeding device of a pipe bending machine and the pipe bending machine thereof, and belongs to the field of pipe bending machines. The transverse moving part in the device comprises a transverse moving frame and a flexible transmission mechanism, wherein the transverse moving frame is arranged on the feeding part through a transverse moving linear guide rail pair, and the transverse moving frame is connected with the clamping part; the flexible transmission mechanism comprises a nut seat, a floating nut and a transverse moving screw rod, wherein the nut seat is arranged on the feeding component, the floating nut is arranged in an inner hole of the nut seat through a key, and two sides of the floating nut are respectively provided with a floating guide sleeve pressed by a spring; the transverse moving screw rod is arranged on the transverse moving frame, is in transmission connection with the floating nut and is driven by a transverse moving motor arranged on the transverse moving frame. According to the flexible feeding device in the pipe bending machine, the buffer structure is adopted to convert rigid vibration of the pipe fitting into flexibility, and vibration force can be absorbed, so that stability of precision of the feeding device is ensured, and service life of the feeding device is prolonged.

Description

Flexible feeding device of pipe bending machine and pipe bending machine thereof

Technical Field

The utility model belongs to the technical field of pipe bending machines, and particularly relates to a flexible feeding device of a pipe bending machine and the pipe bending machine.

Background

The pipe bending machine is generally divided into hydraulic and numerical control, the hydraulic pipe bending machine is driven by pure hydraulic pressure, and the numerical control pipe bending machine is added with a PLC control system on the basis of the hydraulic pipe bending machine, so that digital information control is realized. The numerical control pipe bending machine is most widely applied, and relates to various metal pipe bending machines on automobiles, airplanes and trains, various pipe bending machines of medical production equipment, various pipe bending machines used on power generation boiler systems and the like.

The numerical control pipe bender mainly comprises a mechanical part, a hydraulic system and a PLC control system, wherein the mechanical part mainly comprises a pipe clamping device, a pipe bending transmission device, a boosting device, a lathe bed, a pipe bending die and the like. The working principle of the bent pipe is as follows: the pipe bending die is fixed on the main shaft and rotates along with the main shaft, the pipe is fixed on the clamping groove of the fan-shaped pipe bending die through the clamping die, the movable boosting guiding pressing chute is tightly attached to the bent outer side of the pipe blank, when the pipe bending die rotates for an angle, the pipe is wound on the circumference of the pipe bending die, the rotating angle of the pipe bending die is the bending angle, and the radius of the pipe bending die determines the bending radius of the pipe. The pipe fitting is fed into the pipe bending die through the feeding device for bending, and the key horizontal position and the corner of the three-dimensional pipe bending are adjusted, so that the feeding device is an indispensable component on the pipe bending machine.

The feeding device generally comprises a feeding trolley which is arranged on a machine body guide rail in a sliding manner, a feeding transmission mechanism, a pushing sleeve, a transmission device for driving the pushing sleeve to rotate and a clamp arranged at the end part of the pushing sleeve, wherein the clamp is driven by a clamping cylinder arranged at the rear part of the pushing sleeve, and the feeding transmission mechanism drives the feeding trolley to slide on the guide rail through a motor. The pipe bending machine is used for bending the pipe, and the pipe is fed to the next position to be bent forward until all preset parts of the pipe are bent, and the feeding device returns to the original position.

In practice, the center line of the clamp of the feeding device is tangent to the bending circle of the pipe bending die, the whole pipe bending process is kept unchanged all the time, but the distance between the feeding device and the pipe bending die is far away so as to meet the feeding requirement, even for some long pipes, the feeding device also needs to feed back and forth for many times, therefore, when the pipe is positioned between the feeding device and the pipe bending die, the tiny radial shake at the pipe bending die is transferred to the feeding device to be amplified by tens of hundreds of times, strong impact can be generated to the feeding device, the pipe feeding is hindered, the precision of the feeding device is seriously influenced, the service life of the feeding device is reduced, and after a period of use, the feeding device needs to be maintained and debugged so as to ensure the precision of pipe bending.

The improvement of the feeding device of the pipe bending machine in the prior art is mainly focused on the accuracy of the moving positioning of the feeding device, and the problem is not realized. For example, the applicant has filed under the name: the utility model relates to a feeding mechanism (application number: 201420819869.4) of a pipe bender, which comprises a machine base, a machine frame, a feeding body and a feeding transmission device, wherein the feeding transmission device comprises a feeding motor and a feeding track; the feeding rail is positioned above the machine base, and a bottom plate is arranged above the feeding rail; the side surface of the bottom plate is provided with an offset device; the offset device comprises an offset motor and an offset track; the offset rail is positioned on the bottom plate and is perpendicular to the feeding rail; the frame is positioned on the feeding track, and a die changing device is arranged on the frame; the die changing device comprises a die changing motor, a die changing oil cylinder and a die changing track; the die changing track is vertical to the bottom plate; the feeding body is vertically arranged on the die changing track. It mainly improves the accuracy of feeding under heavy load, but it is not yet aware of the adverse effect of pipe jitter on the feeding device.

In addition, before the pipe bending machine bends, the pipe fitting needs to be aligned and inserted into the feeding device so as to convey the pipe into the pipe bending die for bending, and the traditional pipe bending machine generally adopts manual feeding operation, so that the time and the labor are wasted, the efficiency is low, and safety accidents are easy to cause. For this problem, there are also corresponding solutions in the prior art, such as chinese patent application No.: 201310612152.2, publication date: patent literature of 2014, 2 and 19 discloses an automatic feeding pipe bending machine which comprises a feeding guide assembly, a pipe bending assembly and a material returning assembly; the feed guide assembly includes: the device comprises a material ejection mechanism, a material supporting guide plate mechanism, a guide pipe mechanism, a material discharging frame and a material discharging mechanism; the elbow assembly includes: the clamping die is used for clamping the fed pipe; the bending die can rotate by taking the clamping die as a center under the drive of the driving mechanism and is used for bending the pipe; the material returning assembly comprises a mandrel, a material returning pipe and a driving mechanism. The feeding guide assembly in the pipe bender can realize automatic feeding and discharging, but the structure of the pipe bender is different from the numerical control pipe bender, the pipe bender is not provided with a feeding device through the feeding guide assembly, but is used for directly bending pipes, the short pipe fittings are bent, the stroke of a material ejection mechanism is limited, long materials cannot be fed and fed, the limitation is strong, and the structure is relatively complex.

Disclosure of Invention

1. Problems to be solved

The utility model provides a flexible feeding device of a pipe bending machine, and aims to solve the problems of reduced precision and shortened service life of a feeding device caused by pipe shaking in the feeding process of the conventional feeding device. According to the feeding device, the buffer structure is adopted, so that the rigid vibration of the pipe fitting is converted into the flexibility, and the vibration force can be absorbed, so that the stability of the precision of the feeding device is ensured, and the service life of the feeding device is prolonged.

In addition, the utility model also provides the pipe bending machine comprising the flexible feeding device, and the feeding pushing device is additionally arranged on the pipe bending machine, so that the pipe to be bent can be automatically fed into the flexible feeding device, and the feeding efficiency of the pipe bending machine is improved.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

A flexible feeding device of a pipe bending machine comprises a clamping component for clamping a pipe to be bent, a transverse moving component for driving the clamping component to move along a direction perpendicular to the feeding direction of a pipe fitting, and a feeding component for driving the transverse moving component to move along the feeding direction; the transverse moving part comprises a transverse moving frame and a flexible transmission mechanism, the transverse moving frame is arranged on the feeding part through a transverse moving linear guide rail pair, and the transverse moving frame is connected with the clamping part; the flexible transmission mechanism comprises a nut seat, a floating nut and a transverse moving screw rod, wherein the nut seat is arranged on the feeding component, the floating nut is arranged in an inner hole of the nut seat through a key, two sides of the floating nut are respectively provided with a floating guide sleeve, and the floating guide sleeves compress two ends of the floating nut through springs; the transverse moving screw rod is arranged on the transverse moving frame, is in transmission connection with the floating nut and is driven by a transverse moving motor arranged on the transverse moving frame.

As a further improvement, the inner hole of the nut seat is a stepped hole with a small middle part and large two ends, a step surface is formed at the junction of the large hole and the small hole, and end covers are arranged at the two ends of the inner hole; the floating guide sleeve is positioned in the larger holes at the two ends and limited by the step surface, and the spring is limited between the end cover and the floating guide sleeve.

As a further improvement, the transverse linear guide rail pair comprises a transverse guide rail and a transverse sliding block which are matched with each other, the transverse sliding block is arranged on the feeding part, and the transverse guide rail is arranged on the transverse frame.

As a further improvement, the feeding component comprises a feeding frame and a feeding motor, wherein the feeding frame is arranged on the side surface of a workbench of the pipe bending machine through a linear guide rail pair, the feeding motor is arranged on the feeding frame and is connected with a feeding gear through a feeding shaft, and the feeding gear is in transmission connection with a rack arranged on the side surface of the workbench.

The pipe bending machine comprises the flexible feeding device and a feeding pushing device for feeding the pipe to be bent into the flexible feeding device; the feeding pushing device comprises a shell frame, a roller rotation driving component, a roller translation driving component and a roller clamping component; the roller clamping component comprises a pair of rollers arranged above the shell frame through a pair of roller sliding seats; the roller rotation driving component is used for driving a pair of rollers to synchronously rotate; the roller translation driving component is used for driving a pair of roller sliding seats to be close to or far away from each other, so that the pair of rollers clamp or loosen the to-be-bent pipe.

As a further improvement, the roller wheel rotation driving component comprises a rotation power component and two groups of universal couplings, wherein each group is provided with at least two universal couplings, and the rotation power component drives one roller wheel through the two groups of universal couplings respectively.

As a further improvement, two adjacent universal couplings of each group are respectively connected with a transition shaft, and one ends of the two transition shafts are respectively connected with two ends of the transition adjusting sleeve through keys.

As a further improvement, the roller translation driving component comprises a translation power component, a spline shaft and a shifting fork B; two ends of the spline shaft are fixed in a rotating shaft seat on the shell frame; one end of the shifting fork B is connected with the spline shaft, the other end of the shifting fork B is connected with a sliding block B, and the sliding block B is arranged in a guide hole of the roller sliding seat; and the translation power assembly drives the spline shaft to rotate.

As a further improvement, the translation power assembly comprises a clamping cylinder, a synchronous guide block and a shifting fork A; the clamping cylinder is arranged on the shell frame and is connected with the synchronous guide block, two symmetrical guide grooves are formed in two sides of the synchronous guide block, and a sliding block A is arranged in each guide groove; one end of the shifting fork A is connected with the sliding block A, and the other end of the shifting fork A is connected with the spline shaft.

As a further improvement, the outer circumferential surface of the roller is provided with an arc-shaped groove, and a plurality of grooves along the axial direction are formed in the arc-shaped groove.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) The flexible feeding device of the pipe bending machine disclosed by the utility model has the advantages that the relatively rigid transmission connection structure of the existing screw nut pair is changed in a breakthrough manner, the transverse moving part adopts a flexible transmission structure design, and the two ends of the flexible transmission structure are propped by the floating guide sleeve by slidably arranging the floating nut in the inner hole of the nut seat and are compressed by the spring to form a flexible rotating structure; according to the structure, the transverse moving component can be in soft start, namely, at the starting moment, the transverse moving motor drives the transverse moving screw rod to rotate, the transverse moving screw rod drives the floating nut to compress a section of spring, and then the transverse moving screw rod drives the transverse moving frame to move transversely in a reaction mode, so that the starting impact force is small; in addition, more importantly, especially when the bending die of the pipe bending machine is far away from the clamping part, small transverse fluctuation of the bending die can generate larger amplitude when the bending die is transmitted to the clamping part, and impact is generated on the device.

(2) According to the flexible feeding device of the pipe bending machine, the transverse linear guide rail pair between the transverse moving component and the feeding component is fixed by adopting the transverse moving sliding block, and the transverse moving distance can be prolonged, the length of the transverse moving guide rail is shortened, and the problem that the conventional linear guide rail pair extends above a workbench of the pipe bending machine and interferes with other components on the workbench in the feeding process is solved.

(3) According to the flexible feeding device of the pipe bending machine, the feeding part drives the feeding gear to be meshed with the rack on the workbench through the feeding motor, so that the feeding part drives the clamping part to feed the pipe bending die.

(4) According to the pipe bending machine, through the cooperation of the feeding pushing device and the flexible feeding device, automatic operation of feeding and feeding of the pipe fitting can be performed, and the pipe fitting is not required to be aligned and inserted into the clamping part manually, so that the labor intensity is greatly reduced, the feeding speed and the safety are improved, and the production efficiency is increased.

(5) The pipe bender has the advantages that the structural design of the roller rotary driving component and the roller translational driving component in the feeding pushing device is ingenious and reasonable, and on the premise that a pair of rollers can clamp pipe materials in a relative motion mode, the roller can rotate to drive the pipe materials to move in a feeding mode, and complex composite motion of clamping and feeding the rollers is completed.

(6) The roller translation driving component in the feeding pushing device of the pipe bender has ingenious structural conception, the connecting rod sliding block mechanism is flexibly utilized to convert the up-and-down push-pull action of the clamping cylinder into the transverse translation action of the roller, and the constant-speed reverse movement of a pair of rollers can be ensured, so that the positions of the clamped pipe materials at each time are ensured to be the same and accurate; the roller wheel rotation driving component realizes roller wheel rotation driving through the driving of the universal couplings, and simultaneously can adapt to the movement of the roller wheel, the key connection mode of the transition shaft and the transition adjusting sleeve is adopted between two adjacent universal couplings, the driving length of each group of universal couplings can be adjusted, and the roller wheel rotation driving device adapts to the movement position change of the roller wheel.

(7) According to the pipe bending machine, the arc-shaped grooves on the outer peripheral surfaces of the rollers in the feeding pushing device are designed to stably clamp pipe materials, and the grooves are designed to be stable in feeding and not easy to slip.

Drawings

FIG. 1 is a schematic diagram of the working states of feeding and discharging when the pipe bending machine works;

FIG. 2 is a schematic perspective view of a flexible feeding device of the pipe bender of the present utility model;

FIG. 3 is a schematic diagram of a front view of a flexible feeder of the pipe bender of the present utility model;

FIG. 4 is a schematic left-hand view of the flexible feeder of the pipe bender of the present utility model;

FIG. 5 is a cross-sectional view A-A of FIG. 3;

FIG. 6 is an enlarged partial schematic view of B in FIG. 5;

FIG. 7 is a schematic diagram of a front view of a feed pusher in a pipe bender;

FIG. 8 is a schematic top view of a feed pusher in a pipe bender;

FIG. 9 is a schematic rear view of a feed pusher in the bender;

FIG. 10 is a cross-sectional partial view of E-E of FIG. 7;

FIG. 11 is a cross-sectional partial view of F-F of FIG. 7;

FIG. 12 is a schematic perspective view of an automatic tube turning and feeding device in the tube bending machine;

FIG. 13 is an enlarged partial schematic view of C in FIG. 12;

FIG. 14 is a schematic diagram of a front view of an automatic tube turning and feeding device in a tube bending machine;

FIG. 15 is a schematic left-hand view of an automatic tube turning and feeding device in the tube bending machine;

FIG. 16 is a schematic partial cross-sectional view of D-D of FIG. 14.

The reference numerals in the drawings are respectively:

1. a clamping member;

2. a feeding member; 210. a feeding frame; 220. a feeding motor; 230. a feed gear; 240. a bearing housing; 250. a feeding shaft;

3. a traversing member; 310. a traversing carriage; 320. a traversing linear guide pair; 321. a traversing guide rail; 322. a traversing slide block; 330. a traversing motor; 340. a flexible transmission mechanism; 341. a nut seat; 342. a floating nut; 343. traversing the lead screw; 344. a floating guide sleeve; 345. a spring; 346. an end cap;

4. a material pipe rack; 410. a material placing beam; 420. a material distribution beam; 430. a material blocking component; 431. a shaft seat; 432. a baffle shaft; 433. a striker plate;

5. a material supporting component; 510. a material supporting frame; 520. a supporting wheel seat; 521. a positioning groove; 530. a material supporting wheel; 540. a wheel axle; 550. a protection plate;

6. a tube turning driving part; 610. a cylinder block; 620. a tube turning cylinder; 630. a cylinder connecting piece;

7. a tube turning mechanism; 710. a push-pull rod; 711. a lower push plate; 712. a push plate; 720. a drive link; 730. a connecting rod support; 731. a link shaft; 740. a driven connecting rod; 750. turning the tube plate;

8. a roller rotation driving part; 810. a rotary power assembly; 811. a rotating electric machine; 812. a drive gear set; 813. a bearing seat; 814. a synchronizing gear; 815. a synchronizing shaft; 820. a universal coupling; 830. a transition shaft; 840. a transition adjusting sleeve;

9. a roller translation driving part; 910. a cylinder mounting plate; 920. a translational power assembly; 921. a clamping cylinder; 922. a synchronous guide block; 923. a sliding block A; 924. shifting fork A; 930. a rotating shaft seat; 940. a spline shaft; 950. shifting fork B; 960. a sliding block B;

10. a roller clamping member; 1010. roller slide; 1011. a sliding part; 1020. a roller; 1021. a groove; 1030. a roller shaft; 1040. a pressing plate; 1050. a copper slide plate;

11. and the auxiliary material supporting component.

Detailed Description

The utility model is further described below in connection with specific embodiments and the accompanying drawings.

Example 1

As shown in fig. 1, the embodiment provides a pipe bender, which mainly comprises a workbench, a pipe bending die, a flexible feeding device, a feeding pushing device, an automatic pipe turning feeding device and other components, wherein the workbench and the pipe bending die are common components in the prior art, not shown in the figure, the flexible feeding device and the pipe bending die are arranged on the workbench, and the flexible feeding device is used for clamping a pipe to be bent and sending the pipe to the pipe bending die for bending operation; the automatic pipe turning and feeding device is used for placing to-be-bent pipes in batches, preparing to-be-bent pipe feeding one by one, transmitting the pipe fitting to the feeding pushing device, and further transmitting the pipe fitting to the flexible feeding device by the feeding pushing device to finish feeding operation. According to the pipe bending machine, the automatic operation of three integration of feeding, feeding and feeding of the bent pipe is realized through the cooperation operation of the components, so that the labor intensity is greatly reduced, the production efficiency is improved, and the production safety is ensured. The construction and function of the components will be described in detail below to highlight the innovations of the present utility model.

Fig. 2 to 6 show the structure of the flexible feeding device, which mainly comprises three parts, namely a clamping part 1 for clamping a pipe to be bent, a traversing part 3 for driving the clamping part 1 to move along the direction perpendicular to the feeding direction of the pipe, and a feeding part 2 for driving the traversing part 3 to move along the feeding direction. The clamping part 1 clamps the pipe fed by a manual or feeding pushing device, and sends the pipe to the pipe bending die for bending, and meanwhile, the pipe can be driven to rotate in the three-dimensional bending process; the feeding operation of the clamping member 1 is driven by the feeding member 2, and the clamping member 1 is already known in the art, and the main improvement of the present utility model is not described here, so that the detailed description of the structure thereof is omitted.

The size of the pipe bending die in actual use needs to be determined according to the diameter of the pipe, and the transverse position of the clamping component 1 needs to be readjusted when different pipe bending dies are replaced so as to ensure that the feeding direction and the axial direction of the mandrel are always the same, so that the transverse moving component 3 is used for adjusting the transverse position of the clamping component 1. In the prior art, the traditional screw-nut transmission structure is also commonly adopted to realize the transverse movement of the clamping component 1, but in actual use, the clamping component 1 pushes pipe materials to the pipe bending die from a specific intermittence far away from the pipe bending die, fine shaking is unavoidable in the pipe bending die pipe bending process, the position of the pipe bending die fine shaking is transferred to the clamping component 1 to be amplified by more than ten hundred times, strong impact can be generated on the feeding device, the pipe feeding is hindered, the precision of the feeding device can be seriously influenced, the service life of the feeding device is reduced, and after a period of use, maintenance and debugging are required to be carried out on the pipe bending die to ensure the pipe bending precision. At present, few people realize the problem, and the problem is solved by the utility model.

Referring to fig. 2 to 6, the feeding unit 2 includes a feeding frame 210 and a feeding motor 220, and the feeding frame 210 is mounted on a side surface of a workbench of the pipe bender through a linear guide rail pair; the bearing box 240 is installed on the feeding frame 210, the feeding shaft 250 is arranged in the bearing box 240, the feeding motor 220 is fixed at one end of the bearing box 240 and is connected with the rear end of the feeding shaft 250, the front end of the feeding shaft 250 is connected with the feeding gear 230, and the feeding gear 230 is in transmission connection with a rack arranged on the side face of the workbench. So that the feeding motor 220 drives the feeding gear 230 to rotate through the feeding shaft 250, and the meshing transmission between the feeding gear 230 and the rack drives the whole feeding part 2 to move along the feeding direction, so that the clamping part 1 feeds the pipe bending die.

The traversing part 3 comprises a traversing carriage 310 and a flexible transmission mechanism 340, wherein the traversing carriage 310 is positioned above the feeding carriage 210, the traversing carriage 310 is connected with the clamping part 1, the bottom of the traversing carriage is arranged on the feeding carriage 210 of the feeding part 2 through a traversing linear guide rail pair 320, and the flexible transmission mechanism 340 drives the traversing carriage 310 to move transversely along the vertical feeding direction. It should be noted that, the flexible transmission mechanism 340 is an innovative and optimized design of a traditional structure of a traditional screw nut, and mainly includes a nut seat 341, a floating nut 342 and a traversing screw 343; the nut seat 341 is arranged on the feeding component 2 and is provided with an inner hole which transversely penetrates through the nut seat, the inner hole is a stepped hole with a small middle part and two large ends, a step surface is formed at the junction of the large hole and the small hole, and the floating nut 342 is arranged in the middle smaller hole of the inner hole of the nut seat 341 through a key, so that the floating nut 342 can move in the inner hole of the nut seat 341 but cannot rotate; two sides of the floating nut 342, namely, two larger holes at two ends of an inner hole of the nut seat 341 are respectively provided with a floating guide sleeve 344, the floating guide sleeve 344 can be limited by the step surface of the inner hole, the outer side of the floating guide sleeve 344 is tightly pressed by a spring 345, so that the floating guide sleeve 344 is tightly pressed by two side surfaces of the floating nut 342 to form balance, two ends of the inner hole of the nut seat 341 are provided with end covers 346, and the spring 345 is limited between the end covers 346 and the floating guide sleeve 344 to pre-press the floating guide sleeve 344. The rear end of the traverse screw 343 is arranged on the traverse frame 310 through a bearing box, the front end of the traverse screw 343 is inserted into the inner hole of the nut seat 341, the traverse screw is connected with the floating nut 342 in a transmission way through the floating guide sleeve 344, and the rear end of the traverse screw 343 is connected with the traverse motor 330 arranged on the traverse frame 310.

As can be seen from the above structure, compared with the relatively rigid transmission connection structure of the existing screw-nut pair, the present embodiment adopts a flexible transmission structure design on the traverse member 3 in a breakthrough manner, and forms a flexible rotation structure by slidably mounting the floating nut 342 in the inner hole of the nut seat 341, with both ends thereof being supported by the floating guide sleeve 344 and compressed by the spring 345. In actual use, when the transverse position of the clamping component 1 needs to be adjusted, the transverse moving component 3 can be started in a soft mode, namely, at the moment of starting, the transverse moving motor 330 drives the transverse moving screw rod 343 to rotate, the transverse moving screw rod 343 drives the floating nut 342 to gradually compress the spring 345 to buffer, and then the transverse moving screw rod 343 drives the transverse moving frame 310 to move in a transverse moving mode in a reacting mode, so that the starting impact force is small. Moreover, more importantly, when the pipe bending die of the pipe bending machine is far away from the clamping component 1, the small transverse fluctuation at the pipe bending die can generate larger amplitude when being transmitted to the clamping component 1, through the flexible transmission structure, the clamping component 1 transmits vibration to the traversing carriage 310, and the traversing carriage 310 transversely vibrates to push the floating guide sleeve 344 to compress the spring 345, so that avoiding and buffering release are obtained, the impact is not transmitted to the whole device, the stability and the accuracy of feeding are ensured, and the service life of equipment is prolonged.

In addition, the conventional linear guide rail pair generally adopts a structure that the guide rail is fixed, and the sliding block slides on the guide rail, but in the bending machine, if the structure is adopted, the feeding frame 210 in the feeding part 2 is necessarily extended above the workbench to meet the requirement of the traversing distance of the traversing part 3, the conventional pipe bending machine is also of the structure, and thus the feeding frame 210 can interfere other parts on the workbench in the feeding process, the height of the whole machine needs to be improved, and the weight is also increased. Therefore, to solve this problem, the traversing linear rail pair 320 in this embodiment includes a traversing rail 321 and a traversing slider 322 that cooperate with each other, the traversing slider 322 is mounted on the feeding member 2, and the traversing rail 321 is provided on the traversing carriage 310. The structure is that the transverse sliding block 322 is fixed and the transverse sliding guide rail 321 moves, so that the transverse sliding distance can be prolonged and the length of the transverse sliding guide rail 321 can be shortened, the conventional linear guide rail pair does not extend to the upper part of the workbench of the pipe bending machine, the feeding frame 210 does not need to extend to the upper part of the workbench, and the problem of interference to other parts on the workbench can be avoided in the feeding process.

Example 2

The embodiment optimally designs the structure of the feeding pushing device of the pipe bending machine on the basis of the embodiment 1 so as to solve the problems that the existing pipe bending machine is time-consuming and labor-consuming, high in labor intensity, low in efficiency and the like when aligning and inserting the pipe material into the clamping component 1. The feeding pushing device of the pipe bender mainly comprises a shell frame, a wheel rotation driving part 8, a roller translation driving part 9 and a roller clamping part 10; wherein the roller clamping member 10 includes a pair of rollers 1020 disposed above the housing by a pair of roller slides 1010; the roller rotation driving part 8 is used for driving a pair of rollers 1020 to synchronously rotate; the roller translation driving part 9 is used for driving the pair of roller sliding seats 1010 to be close to or far away from each other, so that the pair of rollers 1020 clamp or unclamp the pipe to be bent.

For feeding, it is not difficult, and there are various structures in the prior art, for example, a similar pair of wire feeding wheels is used for feeding welding wires during welding; however, it is really difficult to bend the pipe longer by the pipe bender, and the pipe needs to be fed, and the pipe needs to be accurately fed into the clamping component 1, so that the requirement on the feeding structure is high. In this embodiment, a pair of rollers 1020 are used to clamp and transport the tubing, which first requires that the tubing be able to be placed into the pair of rollers 1020; then a pair of rollers 1020 are mutually close to each other and clamp the pipe material, and the axial position of the pipe material after clamping is accurate; finally, a pair of rollers 1020 rotate the delivery tubing. It can be seen that the pair of rollers 1020 have complex movements of translation and self-rotation, and for a single problem, the problem is not difficult to solve, for example, only translation motion can be realized by a screw-nut pair, a cylinder or oil cylinder drive and other conventional manners; only self-rotation can be realized by directly driving the motor. However, after the two simple actions are combined, the precision requirement is required to be ensured, so that the translational actions realized by conventional modes such as a screw-nut pair, a cylinder or an oil cylinder drive are difficult to ensure the synchronism of the pair of rollers 1020, the position precision after clamping the pipe material is difficult to ensure, and the space is occupied; the motor directly drives the roller 1020 to rotate, and the translation is difficult to realize.

In view of the complexity of the above problems, and the practical applicability of the combination of specific applications, the inventors have long practiced and have been fuelled with and accumulated in the past, devised a feed pushing device of this embodiment, which is directed to solving the above problems.

The shell frame is composed of an upper box body and a lower box body, wherein the upper box body and the lower box body are combined with each other, a space is reserved in the shell frame, so that a transmission part is arranged in the shell frame, the periphery of the transmission part can be surrounded by plates, and the shell frame is formed into a closed box body, is compact in structure and attractive, and is not easy to fall into dust. A slot is formed in the upper surface of the upper case to mount the roller clamping member 10. Specifically, a sliding groove is formed at two sides of the slot hole of the upper case, sliding parts 1011 are formed at two sides of the roller sliding seat 1010 in the roller clamping component 10, the sliding parts 1011 are slidably arranged in the sliding groove, and the upper sides of the sliding parts 1011 are tightly pressed by a pressing plate 1040 fixed on the upper case, so that a pair of roller sliding seats 1010 can slide along the sliding groove to enable a pair of rollers 1020 to approach or separate from each other. In order to reduce the friction force of the roller slider 1010 sliding, to smooth sliding and to prolong the service life, a copper slider 1050 is provided on the outer side of the sliding portion 1011, and the sliding portion 1011 slides in contact with the copper slider 1050. The roller slide 1010 is provided with a vertical roller shaft 1030 through a bearing, the upper end of the roller shaft 1030 is provided with a roller 1020, the lower end of the roller shaft is connected with a roller rotation driving component 8, and the roller slide 1010 is connected with a roller translation driving component 9.

As shown in fig. 7, 9 and 11, the roller rotation driving part 8 mainly includes a rotation power assembly 810 and two sets of universal couplings 820, each set having at least two universal couplings 820, and the rotation power assembly 810 drives one roller 1020 through the two sets of universal couplings 820. Specifically, the uppermost one of the universal couplings 820 is connected to the lower end of the roller shaft 1030, while two adjacent universal couplings 820 are respectively connected to a transition shaft 830, one ends of the two transition shafts 830 are respectively connected to two ends of the transition adjusting sleeve 840 through keys, and the transmission length of each set of universal couplings 820 can be adjusted, so as to adapt to the translational position change of the roller 1020. The rotary power assembly 810 includes a rotary motor 811, a drive gear set 812, and a bearing housing 813; wherein, the rotating motor 811 is installed on the upper surface of the lower case at one side of the upper case, the bearing seat 813 is installed inside the lower case, and a pair of vertical synchronizing shafts 815 are installed in the bearing seat 813 through bearings; the upper ends of the pair of synchronous shafts 815 are respectively connected with the lowest universal coupling 820 in the two groups of universal couplings 820, and the lower ends of the pair of synchronous shafts 815 are provided with a pair of meshed synchronous gears 814, so that the rotation speeds of the two synchronous shafts 815 are ensured to be equal; the rotating motor 811 is connected to one of the synchronizing shafts 815 through a transmission gear set 812, that is, a plurality of pairs of meshed gears, to achieve transmission and a reduction effect, and can be determined according to actual needs, in this embodiment, two pairs of meshed gears are used to form the transmission gear set 812. As can be seen from the above structure, the rotating motor 811 can transmit torsion to the roller shaft 1030 through the driving gear set 812, the synchronizing shaft 815 and the universal coupling 820 in sequence, so as to drive the pair of rollers 1020 to rotate synchronously, and the structure does not affect the mutual movement between the pair of rollers 1020.

In order to improve the accuracy of clamping the pipe material by the pair of rollers 1020 and the stability of pipe material transmission, in the embodiment, an arc-shaped groove is formed on the outer peripheral surface of the roller 1020, so that the roller 1020 can be well attached to the surface of the pipe material, and the clamping accuracy is high; and a plurality of grooves 1021 along the axial direction are uniformly formed on the peripheral surface of the roller 1020, so that the gripping force of the roller 1020 on the surface of the pipe is improved, the roller cannot slip in the conveying process, and the stability of conveying is ensured.

As shown in connection with fig. 7, 9 and 10, the roller translational drive assembly 9 includes a translational power assembly 920, two spline shafts 940, and 2 shift forks B950; wherein, two ends of each spline shaft 940 are supported and arranged in two rotating shaft seats 930 at one side in the upper box body through copper sleeves, and two end surfaces of each spline shaft 940 are fixedly positioned by adopting end covers; one end of the shifting fork B950 is connected to the spline shaft 940 through a spline, the other end of the shifting fork B950 is connected with a sliding block B960 through a pin, and the sliding block B960 is arranged in a guide hole of the roller slide 1010 and is in sliding contact with the surface of the guide hole, so that the rotation of the spline shaft 940 can be skillfully converted into the translation of the roller slide 1010.

Translational power assembly 920 is used to drive the rotation of spline shaft 940. Generally, the translational power assembly 920 may take various forms, such as a motor, but it is difficult to ensure the synchronism of the rotation of the two spline shafts 940, and the roller 1020 is a reciprocating translational motion, which is also difficult to control using a motor. Thus, the present embodiment innovatively takes the form of a cylinder drive, i.e., the translational power assembly 920 includes a clamping cylinder 921, a synchronizing guide block 922, and 2 shift forks a924; the clamping cylinder 921 is arranged in the upper box body through the cylinder mounting plate 910 and is connected with the synchronous guide block 922, two symmetrical guide grooves are formed in two sides of the synchronous guide block 922, and a sliding block A923 is arranged in each guide groove; one end of each of the 2 shifting forks A924 is respectively connected with the sliding block A923, and the other end of each shifting fork A924 is respectively connected with one spline shaft 940 through a spline, so that the up-and-down push-pull action of the clamping cylinder 921 can be converted into rotation of the spline shafts 940.

Therefore, the structural design of the roller translation driving component 9 is ingenious, the connecting rod sliding block mechanism is flexibly utilized to convert the up-and-down push-pull motion of the clamping cylinder 921 into the transverse translation motion of the roller 1020, and the constant speed and the reverse movement of the pair of rollers 1020 can be ensured, so that the same and accurate positions of the clamped pipe materials each time are ensured; the roller rotation driving part 8 realizes the rotation transmission of the roller 1020 through the transmission of the universal coupling 820, and can adapt to the movement of the roller 1020.

In addition, an auxiliary material supporting component 11 is arranged on the upper box body along the feeding direction of the pair of rollers 1020 to support the feeding in an auxiliary manner; the automatic feeding device comprises a support and a roll shaft arranged on the support through a bearing, wherein the pipe is supported on the roll shaft, and the accuracy of the height position of the pipe in the feeding process is further guaranteed.

The specific steps of feeding the to-be-bent pipe into the clamping component 1 by adopting the device are as follows: first, the pipe to be bent is placed between a pair of rollers 1020 of the roller clamping member 10; then, the clamping cylinder 921 acts to pull the synchronous guide block 922 to move downwards, and the sliding block A923 drives the shifting fork A924 to rotate, the shifting fork A924 drives the spline shaft 940 to rotate, the spline shaft 940 drives the shifting fork B950 to rotate, and the shifting fork B950 drives the pair of roller sliding seats 1010 to move in opposite directions through the sliding block B960 until the pair of rollers 1020 clamp the pipe to be bent; then, the rotating motor 811 is started, the synchronizing shafts 815 are driven by the transmission gear set 812, a pair of synchronizing shafts 815 realize synchronous rotation by a pair of meshed synchronizing gears 814 thereon, and the roller shafts 1030 are driven by the universal coupling 820 to drive a pair of rollers 1020 to reversely rotate, so that the pipe to be bent is fed forward into the clamping component 1.

Therefore, in the feeding and pushing device of this embodiment, the structural design of the roller rotation driving component 8 and the roller translation driving component 9 is ingenious and reasonable, and on the premise that the pair of rollers 1020 can clamp the pipe material by relative movement, the roller 1020 can also rotate to drive the pipe material to perform feeding movement, so as to complete the complex composite movement of clamping and feeding the roller 1020.

Example 3

Although example 2 has well solved the problem of aligning and feeding the tubing into the gripping members 1, the feed pushing device needs to put the tubing between a pair of rollers 1020 before feeding the tubing, which is time consuming and labor intensive and is also relatively inefficient if manual feeding is used. Therefore, the adoption of the feeding equipment for improving the manual feeding is definitely the best mode, and the embodiment provides the device for solving the feeding problem of the feeding pushing device.

Referring to fig. 12 to 16, the embodiment provides an automatic tube turning and feeding device of a tube bending machine, which mainly comprises a material pipe rack 4 for placing a tube to be bent, a material supporting part 5, a tube turning driving part 6 and a tube turning mechanism 7. Wherein, the frame for placing the to-be-bent pipe is welded by a steel pipe, a pair of material placing beams 410 and material distributing beams 420 which are connected end to end are arranged on the frame in parallel at intervals, the upper surface of the material placing beams 410 is slightly inclined downwards, the inclination of the upper surface of the material distributing beams 420 is larger, the frame is relatively suitable at 3 degrees to 6 degrees, the bottom end of the inclined surface of the material distributing beams 420 is close to the material supporting part 5, and a material blocking component 430 is arranged. In use, a plurality of to-be-bent pipes are placed on the material pipe frame 4, and due to the inclination of the material placing beam 410 and the material distributing beam 420, the to-be-bent pipes can slide downwards under the self weight and are blocked by the material blocking assembly 430; when one tube is removed, the other tube is rolled down in sequence, again blocked by the stop assembly 430.

The material supporting parts 5 are provided with a pair of material supporting parts which are respectively and correspondingly arranged in front of the pair of material distribution beams 420, and each material supporting part 5 comprises a material supporting frame 510, a material supporting wheel seat 520 and a material supporting wheel 530; wherein, the supporting roller seat 520 is installed on the supporting frame 510, and the supporting roller 530 is disposed on the supporting roller seat 520. In order to adapt to the same height of the axis when feeding different types of pipes, the riding wheel seat 520 is provided with a row of positioning grooves 521 with different heights, the riding wheel 530 is arranged on the wheel shaft 540, and two ends of the wheel shaft 540 are supported in the positioning grooves 521, so that the height of the riding wheel 530 can be adjusted by selecting different positioning grooves 521, and the axial heights are consistent when feeding rollers with different diameters. In addition, when the pipe material on the material pipe rack 4 rolls onto the material supporting wheel 530, the material pipe rack 4 has certain kinetic energy and possibly rushes out of the material supporting wheel 530 to fall, so that the protection plate 550 for preventing the material supporting wheel 530 from falling off when the bent pipe is to be arranged on the material supporting rack 510 is arranged, one end position of the protection plate 550, which is close to the outer side of the material supporting wheel 530, is higher than the material supporting wheel 530, and the material blocking can be effectively performed, so that the pipe material is prevented from rolling off.

How to place the tube from the tube rack 4 onto the material supporting wheel 530 and also to ensure that the end of the tube is placed between the pair of rollers 1020 is the biggest difficulty of the device. In this embodiment, the above actions are achieved by the pipe turning driving component 6 and the pipe turning mechanism 7, and as shown in fig. 14 and 16, each material supporting frame 510 is provided with a pipe turning mechanism 7, the pipe turning mechanism 7 comprises a connecting rod support 730 and a driven connecting rod 740 fixed on one side of the material supporting frame 510, and a connecting rod shaft 731 is arranged on the connecting rod support 730; one end of the driven connecting rod 740 is connected with the connecting rod shaft 731 through a key, the other end of the driven connecting rod 740 is connected with the tube turning plate 750, the upper end surface of the tube turning plate 750 is an inclined surface, and the rotation plane of the connecting rod shaft 731 is perpendicular to the axis of the pipe material; the flip driving part 6 is used to drive the link shaft 731.

In order to ensure that the feeding process of the pipe material is always kept horizontal, two pipe turning mechanisms 7 are required to synchronously act; even when the tube stock is long, a plurality of automatic tube turning feeding devices are required to be operated simultaneously, which has a high requirement for the tube turning driving member 6. As shown in fig. 14, the tube turning mechanism 7 of this embodiment further includes a push-pull rod 710 and a driving link 720, one end of the driving link 720 is connected to a link shaft 731 by a key, and the other end of the driving link 720 is connected to an upper push plate 712 on the push-pull rod 710, so that the tube turning mechanisms 7 on multiple devices or multiple devices can be connected to the same push-pull rod 710 by the driving link 720, and then the tube turning driving member 6 is connected to the push-pull rod 710, so that synchronous motion can be achieved. The tube turning driving part 6 includes a cylinder block 610, a tube turning cylinder 620, and a cylinder connector 630; wherein, the tube-turning cylinder 620 is mounted on the cylinder block 610 through a shaft, so that the tube-turning cylinder 620 can swing, and the tube-turning cylinder 620 is connected with a lower push plate 711 on the push-pull rod 710 through a cylinder connector 630. Therefore, the pipe turning cylinder 620 can drive the pipe turning plate 750 to rotate through the push-pull rod 710, the driving connecting rod 720, the connecting rod shaft 731 and the driven connecting rod 740 in sequence, and the feeding action is completed.

It should be noted that, since the driven connecting rod 740 can only drive the tube turning plate 750 to rotate, but does not move, when feeding the tubes with signals of different diameters, the tube turning plate 750 may hold more than two tubes at a time, which is not allowed. Therefore, the material blocking assembly 430 is designed according to this embodiment, and includes a shaft seat 431 and at least one material blocking plate 433, wherein the at least one material blocking plate 433 is mounted on the shaft seat 431 through a baffle shaft 432, and the plurality of material blocking plates 433 have different material blocking positions, so that the material blocking plates 433 with suitable material blocking positions are selected according to different tube diameters, so as to ensure that only one material is fed at a time.

The steps of feeding by adopting the device are as follows: first, before placing the tube, a stopper 433 of an appropriate stopper position is selected according to the diameter of the tube, and a tray 530 is installed into a positioning groove 521 of an appropriate height; then, placing the to-be-bent pipe on the material pipe frame 4; then, the pipe turning cylinder 620 acts to drive the push-pull rod 710 to swing back and forth and drive the driving connecting rod 720 to rotate up and down, and further drive the connecting rod shaft 731 to rotate, the connecting rod shaft 731 drives the driven connecting rod 740 to rotate, the pipe turning plate 750 turns upwards to jack up the pipe to be bent and separate from the pipe rack 4, and meanwhile, the pipe material is pushed forward along the pipe axial direction; finally, the to-be-bent pipe on the pipe turning plate 750 rolls down onto the material supporting wheel 530 along the inclined plane of the upper end of the pipe turning plate, and the front end of the pipe enters between the pair of rollers 1020 to prepare for feeding by the feeding pushing device; so far, the feeding action is completed; the steps are repeated, and the feeding operation can be continuously performed.

According to the embodiment, the pipe bending machine can automatically feed, feed and feed pipe fittings through the cooperation of the automatic pipe turning and feeding device, the feeding pushing device and the flexible feeding device, so that the labor intensity is greatly reduced, the feeding speed and safety are improved, and the production efficiency is improved.

The examples of the present utility model are merely for describing the preferred embodiments of the present utility model, and are not intended to limit the spirit and scope of the present utility model, and those skilled in the art should make various changes and modifications to the technical solution of the present utility model without departing from the spirit of the present utility model.

Claims (9)

1. The utility model provides a flexible material feeding unit of bending machine, includes clamping part (1) that are used for the centre gripping to wait to return bend for drive clamping part (1) along sideslip part (3) that are perpendicular to pipe fitting pay-off direction removed, and be used for driving pay-off part (2) that sideslip part (3) removed along the pay-off direction, its characterized in that: the transverse moving component (3) comprises a transverse moving frame (310) and a flexible transmission mechanism (340), the transverse moving frame (310) is arranged on the feeding component (2) through a transverse moving linear guide rail pair (320), and the transverse moving frame (310) is connected with the clamping component (1); the flexible transmission mechanism (340) comprises a nut seat (341), a floating nut (342) and a transverse moving screw rod (343), wherein the nut seat (341) is arranged on the feeding component (2), the floating nut (342) is arranged in an inner hole of the nut seat (341) through a key, two sides of the floating nut (342) are respectively provided with a floating guide sleeve (344), and the floating guide sleeves (344) compress two ends of the floating nut (342) through springs (345); the transverse moving screw (343) is arranged on the transverse moving frame (310), is in transmission connection with the floating nut (342) and is driven by a transverse moving motor (330) arranged on the transverse moving frame (310);

the inner hole of the nut seat (341) is a stepped hole with a small middle part and large two ends, a step surface is formed at the junction of the large hole and the small hole, and end covers (346) are arranged at the two ends of the inner hole; the floating guide sleeve (344) is positioned in larger holes at two ends and limited by the step surface, and the spring (345) is limited between the end cover (346) and the floating guide sleeve (344).

2. The flexible feed device of a pipe bender according to claim 1, wherein: the transverse linear guide rail pair (320) comprises a transverse guide rail (321) and a transverse sliding block (322) which are matched with each other, the transverse sliding block (322) is arranged on the feeding part (2), and the transverse guide rail (321) is arranged on the transverse frame (310).

3. The flexible feed device of a pipe bender according to claim 1, wherein: the feeding component (2) comprises a feeding frame (210) and a feeding motor (220), the feeding frame (210) is arranged on the side face of a workbench of the pipe bending machine through a linear guide rail pair, the feeding motor (220) is arranged on the feeding frame (210), a feeding gear (230) is connected through a feeding shaft (250), and the feeding gear (230) is in transmission connection with a rack arranged on the side face of the workbench.

4. The utility model provides a return bend machine which characterized in that: a feed pusher comprising the flexible feed device of claim 1 for feeding the bend to the flexible feed device; the feeding pushing device comprises a shell frame, a roller rotation driving component (8), a roller translation driving component (9) and a roller clamping component (10); the roller clamping component (10) comprises a pair of rollers (1020) arranged above the shell frame through a pair of roller sliding seats (1010); the roller rotation driving component (8) is used for driving a pair of rollers (1020) to synchronously rotate; the roller translation driving component (9) is used for driving a pair of roller sliding seats (1010) to be close to or far away from each other, so that a pair of rollers (1020) clamp or unclamp a pipe to be bent.

5. A pipe bender according to claim 4, wherein: the roller wheel rotation driving component (8) comprises a rotation power component (810) and two groups of universal couplings (820), each group is provided with at least two universal couplings (820), and the rotation power component (810) drives one roller wheel (1020) through the two groups of universal couplings (820).

6. A pipe bender according to claim 5, wherein: two adjacent universal couplings (820) of each group are respectively connected with a transition shaft (830), and one ends of the two transition shafts (830) are respectively connected with two ends of the transition adjusting sleeve (840) through keys.

7. A pipe bender according to claim 4 or 5, wherein: the roller translation driving component (9) comprises a translation power component (920), a spline shaft (940) and a shifting fork B (950); both ends of the spline shaft (940) are fixed in a rotating shaft seat (930) on the shell frame; one end of the shifting fork B (950) is connected with the spline shaft (940), the other end of the shifting fork B is connected with the sliding block B (960), and the sliding block B (960) is arranged in a guide hole of the roller sliding seat (1010); the translation power assembly (920) drives the spline shaft (940) to rotate.

8. A pipe bender according to claim 7, wherein: the translation power assembly (920) comprises a clamping cylinder (921), a synchronous guide block (922) and a shifting fork A (924); the clamping cylinder (921) is arranged on the shell frame and is connected with the synchronous guide block (922), two symmetrical guide grooves are formed in two sides of the synchronous guide block (922), and a sliding block A (923) is arranged in each guide groove; one end of the shifting fork A (924) is connected with the sliding block A (923), and the other end of the shifting fork A is connected with the spline shaft (940).

9. A pipe bender according to claim 4 or 5, wherein: the outer circumferential surface of the roller (1020) is provided with an arc-shaped groove, and a plurality of grooves (1021) along the axial direction are formed in the arc-shaped groove.