CN115007701A

CN115007701A - Pipe bending machine and pipe bending method

Info

Publication number: CN115007701A
Application number: CN202210761546.3A
Authority: CN
Inventors: 石怿杰; 王鹏鹏; 鲁鹏; 马鹰
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Gree Intelligent Equipment Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-09-06

Abstract

The invention relates to a pipe bending machine and a pipe bending method. The pipe bending machine comprises: a frame; a bending mechanism, which is arranged on the frame, includes a bending shaft for bending pipes; a feeding mechanism includes The primary feeding mechanism and the secondary feeding mechanism are arranged on the frame and are suitable for conveying the pipe to the bending mechanism; wherein: the primary feeding mechanism is suitable for driving the pipe to be bent to move to a first and consistent length relative to both sides of the bending axis. Position; the secondary feeding mechanism is suitable for driving the pipe to be bent to continue to move, and to move to a second position that is inconsistent with the lengths on both sides of the bending axis, so that the pipe to be bent is two times after being bent by the bending mechanism. A set height difference is generated at the end. In the present invention, a certain height difference is formed between the two ends of the bent U-shaped pipe through the additional secondary feeding mechanism, so as to meet the diversified needs. Realize the U-shaped pipe fittings with a shorter total bending length and increase the bending pipe length range.

Description

Pipe bending machine and pipe bending method

Technical Field

The invention relates to the technical field of machining, in particular to a pipe bending machine and a pipe bending method.

Background

The pipe bender is special processing equipment for U-shaped pipe fittings used in the air conditioning and refrigeration industry and the automobile industry, and can realize the processing steps of copper pipe coil material discharging, straightening and rounding, fixed-length cutting, bending and the like. The traditional pipe bending machine can only bend U-shaped pipe fittings with equal height, however, along with the increase of market demands, the pipe bending machine has a plurality of requirements on pipe shapes of pipe fittings, especially the demand for the U-shaped pipe fittings with height difference is increasing day by day, and therefore, in order to meet the market demands, the pipe bending machine capable of bending the U-shaped pipe fittings with different height difference is urgently needed to be provided.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect that the pipe bender in the prior art can only bend equal-height U-shaped pipe fittings, thereby providing a pipe bender and a pipe bending method capable of bending non-equal-height U-shaped pipe fittings with height differences.

To solve the above problem, in a first aspect, the present invention provides a bender, comprising:

a frame;

the bending mechanism is arranged on the rack and comprises a bending shaft for bending the pipe;

the feeding mechanism comprises a primary feeding mechanism and a secondary feeding mechanism which are arranged on the rack and are suitable for conveying the pipes to the bending mechanism;

wherein: the primary feeding mechanism is suitable for driving the pipe to be bent to move to a first position which is consistent in length relative to the two sides of the bending shaft;

the secondary feeding mechanism is suitable for driving the pipe to be bent to move continuously and move to a second position which is different from the bending shaft in length on two sides, so that the pipe to be bent generates a set height difference on two ends after being bent by the bending mechanism.

Optionally, the secondary feeding mechanism comprises:

the clamping assembly comprises a clamping piece and a driving piece for driving the clamping piece to clamp or release the pipe;

and the secondary feeding driving assembly is suitable for driving the clamping assembly to move towards the direction close to or far away from the bending mechanism.

Optionally, the clamping member comprises:

the upper surface of the first clamping part is provided with a first half clamping hole;

the second clamping part is arranged above the first clamping part, a second half clamping hole is formed in the lower surface of the second clamping part, and the first half clamping hole and the second half clamping hole correspondingly form a clamping hole suitable for being in interference fit with the periphery of the pipe;

the driving piece is connected with the first clamping part and/or the second clamping part and is suitable for driving the first clamping part and the second clamping part to move close to or away from each other so as to clamp or release the pipe.

Optionally, the first clamping part and the second clamping part are respectively clamping plates with set extension lengths;

and a plurality of groups of clamping holes are formed at intervals between the first clamping part and the second clamping part along the length direction of the clamping piece.

Optionally, the bender further comprises:

the intercepting mechanism is arranged between the feeding mechanism and the bending mechanism and is suitable for intercepting the pipe conveyed to the rack by a set length so as to obtain the pipe to be bent;

the primary feeding mechanism is arranged close to the intercepting mechanism side, and the secondary feeding mechanism is arranged far away from the intercepting mechanism side.

Optionally, the intercepting mechanism comprises:

the cutting assembly comprises a cutter head, a cutter groove for the pipe to pass through is formed in the center of the cutter head, and the cutter head is suitable for cutting the pipe in an annular mode at a set cutting position without cutting off the pipe.

Optionally, the bending machine further includes:

and the in-place detection mechanism is arranged on one side of the bending mechanism, which is far away from the feeding mechanism, and is suitable for feeding back signals to a control system of the pipe bending machine when the pipe to be bent moves to the first position and/or the second position.

Optionally, the bending machine further includes:

the feeding mechanism is arranged on one side of the rack close to the feeding mechanism and used for conveying the pipes from the pipe storage area to the rack;

the straightening and rounding mechanism is arranged between the feeding mechanism and is used for straightening and rounding the pipe conveyed from the feeding mechanism;

the feeding mechanism is positioned between the straightening and circle-correcting mechanism and the bending mechanism, the secondary feeding mechanism is arranged close to the straightening and circle-correcting mechanism side, and the primary feeding mechanism is arranged close to the bending mechanism side.

In a second aspect, the invention further provides a pipe bending method applied to the pipe bender, and the pipe bending method includes the following steps:

the pipe bending method comprises the following steps of carrying out primary feeding, wherein a primary feeding mechanism is controlled to move a pipe to be bent to a first position which is consistent in length relative to two sides of a bending shaft of a bending mechanism;

the secondary feeding is performed, the secondary feeding mechanism is controlled to drive the pipe to move continuously, and the pipe moves to a second position which is different from the second position corresponding to the two sides of the bending shaft in length;

and bending, wherein the bending mechanism is controlled to operate to bend the pipe to be bent, so that a set height difference is generated at two ends of the bent pipe.

Optionally, the following steps are performed after the primary feeding step and before the secondary feeding step:

cutting, namely cutting the pipe at a set cutting position without cutting off the pipe;

the following steps are performed after the secondary feeding step and before the bending step:

and breaking, namely clamping the pipe from two ends by the bending mechanism and the secondary feeding mechanism, and then controlling the secondary feeding mechanism to move towards the direction far away from the bending mechanism so as to break the pipe at the cutting position, thereby obtaining the pipe to be bent.

The invention has the following advantages:

1. compared with the traditional long U-shaped pipe bending machine, the pipe bending machine provided by the invention can accurately dislocate the traditional U-shaped pipe with equal height through the additionally arranged secondary feeding mechanism, so that a certain height difference is formed at two ends of the bent U-shaped pipe, and the diversified requirements of the market on pipeline devices can be met.

2. The secondary feeding mechanism comprises a clamping assembly, the clamping assembly comprises a clamping piece and a driving piece, the clamping piece comprises a first clamping part and a second clamping part, the first clamping part and the second clamping part are correspondingly provided with a first half clamping hole and a second half clamping hole, the first half clamping hole and the second clamping hole correspondingly form a clamping hole suitable for being in interference fit with the periphery of a pipe, the pipe is clamped through the clamping hole, the clamping positioning effect is good, the pipe cannot be damaged, the driving piece drives the first clamping part and the second clamping part to mutually approach or move away to clamp or release the pipe, and the whole clamping assembly is simple in structure and more convenient and efficient to control.

3. According to the invention, the in-place detection mechanism is arranged on one side of the bending mechanism, which is far away from the feeding mechanism, and is suitable for feeding back signals to the control system of the pipe bending machine when the pipe to be bent moves to the first position and/or the second position, and the control system of the pipe bending machine correspondingly controls the primary feeding mechanism and the secondary feeding mechanism to stop feeding according to the signals fed back by the in-place detection mechanism, so that accurate positioning of the bending position can be ensured, the position of the pipe to be bent entering the bending mechanism is more accurate, more accurate processing precision is achieved, the production efficiency and the processing quality are improved, and the product percent of pass is ensured.

4. According to the invention, the step of cutting the pipe at the set cutting position without cutting is executed after the primary feeding step and before the secondary feeding step, so that the subsequent secondary feeding step is facilitated, and meanwhile, the pipe orifice is prevented from being easily collided and rubbed with other parts to cause damage in the secondary feeding process after the pipe is cut.

5. After the cutting assembly finishes the cutting step, the secondary feeding mechanism clamps the pipe, the pipe to be bent is continuously pushed forwards to move to a preset second position, the pipe is clamped by the bending mechanism and the secondary feeding mechanism from two ends, then the secondary feeding mechanism is controlled to move towards the direction far away from the bending mechanism, the pipe is broken at the cutting position, and therefore the pipe to be bent is obtained.

6. The pipe bending machine provided by the invention has the advantages that through the design of the secondary feeding mechanism, the common pipe bending machine has double functions, not only can be used for bending a U-shaped pipe with equal height, but also can be used for bending a U-shaped pipe with a certain fall height, a pipe bending machine capable of bending the U-shaped pipe with unequal height is not required to be independently purchased, the field and the cost are saved, the use experience is improved in a breakthrough manner, meanwhile, the whole process of the pipe bending machine provided by the invention is automatically operated, the automation degree is higher, the production efficiency is greatly improved, the labor intensity is reduced, the pipe bending machine has the advantages of multiple functions, saving in utilization, stable production, convenience in use, reduction in labor cost and the like, and the problems of single function, poor flexibility, time consumption and the like of the conventional pipe bending machine are solved.

Drawings

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

FIG. 1 shows an elevation view of a complete machine of the pipe bender in an embodiment;

FIG. 2 shows a top view of the overall bender in an embodiment;

FIG. 3 shows a partial enlarged view of FIG. 1;

FIG. 4 shows a partial enlargement one of FIG. 2;

FIG. 5 shows a second enlarged view of a portion of FIG. 2;

FIG. 6 is a partial schematic structural diagram of an aligning and rounding mechanism, a cutting mechanism and a feeding mechanism in the embodiment;

FIG. 7 is a schematic structural view of the intercepting mechanism in the embodiment;

FIG. 8 is a schematic structural view of a secondary feeding mechanism in the embodiment;

FIG. 9 is a front view showing a secondary feeding mechanism in the embodiment;

FIG. 10 shows a top view of the secondary feed mechanism in an embodiment;

FIG. 11 shows a side view of the secondary feed mechanism in an embodiment;

description of the reference numerals:

100. a frame;

10. a feeding mechanism; 20. a straightening and rounding mechanism; 30. a feeding mechanism; 31. a primary feeding mechanism; 311. a cutting clamping cylinder;

32. a secondary feeding mechanism; 321. a clamping assembly; 3211. a clamping member; 32111. a first clamping portion; 32112. a second clamping portion; 3212. a drive member; 3213. a clamping hole; 322. a secondary feeding driving component;

33. a belt feeding assembly;

40. an intercepting mechanism; 41. a cutting assembly; 42. a cutter motor;

50. a bending mechanism; 501. bending the shaft; 51. a core bar; 52. bending servo; 53. bending the clamping cylinder;

60. a material returning mechanism; 61. a material returning lead screw;

70. a guide mechanism;

80. a material returning and receiving mechanism;

90. and an in-place detection mechanism.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example one

As shown in fig. 1 to 11, the present embodiment provides a pipe bending machine, including a machine frame 100, a bending mechanism 50, and a feeding mechanism 30, where the bending mechanism 50 is disposed on the machine frame 100 and includes a bending shaft 501 for bending a pipe; the feeding mechanism 30 comprises a primary feeding mechanism 31 and a secondary feeding mechanism 32 which are arranged on the frame 100 and are suitable for conveying the pipes to the bending mechanism 50; wherein: the primary feeding mechanism 31 is adapted to drive the pipe to be bent to move to a first position with consistent length relative to two sides of the bending shaft 501; the secondary feeding mechanism 32 is adapted to drive the tube to be bent to move continuously and move to a second position with different lengths corresponding to the two sides of the bending shaft 501, so that a set height difference is generated between the two ends of the tube to be bent after the tube to be bent is bent by the bending mechanism 50.

The bending machine that this embodiment provided, compare with traditional long U bending machine, through the secondary feeding mechanism 32 that adds, can carry out accurate dislocation with traditional equal height U type pipe, make U type pipe both ends after buckling form certain difference in height, can satisfy the diversified demand of market to the pipeline device, simultaneously because the secondary feeding mechanism 32 that increases can make the pay-off distance extension, this just makes the tubular product length of waiting to bend can suitable shortening, thereby can realize the U type pipe fitting that the total length of system of bending is shorter, the long scope of the system of increase bending pipe.

It should be noted that, in the above scheme, the length of the pipe to be bent is a set value, the pipe to be bent is a section of the whole pipe, and although the pipe to be bent is not cut from the whole pipe, the length of the pipe to be bent is a known set value.

Further, the first position is an equal-length position where the left end and the right end of the pipe to be bent have the same length relative to the bending axis 501, and when the bending mechanism 50 bends the pipe to be bent at the position, the bending mechanism 50 can bend the pipe to be bent into a U-shaped pipe with equal height; the second position is a non-equal-length position where the left end and the right end of the pipe to be bent have different lengths relative to the bending axis 501, and when the bending mechanism 50 bends the pipe to be bent at the second position, the bending mechanism 50 can bend the pipe to be bent into a non-equal-height U-shaped pipe with a certain fall.

Optionally, as shown in fig. 1 to 4 and 8 to 11, the secondary feeding mechanism 32 includes a clamping assembly 321 and a secondary feeding driving assembly 322, where the clamping assembly 321 includes a clamping member 3211 and a driving member 3212 for driving the clamping member 3211 to clamp or release the tubular product; the secondary feed drive assembly 322 is adapted to drive the clamp assembly 321 toward or away from the bending mechanism 50.

In the above scheme, when feeding is performed for the second time, the clamping assembly 321 clamps the pipe and pushes the pipe to be bent to move forward for a set distance, so that the pipe to be bent is located at a second position with inconsistent lengths of the left side and the right side of the bending shaft 501.

Optionally, the clamping member 3211 includes a first clamping portion 32111 and a second clamping portion 32112, and a first half clamping hole is formed in an upper surface of the first clamping portion 32111; the second clamping portion 32112 is arranged above the first clamping portion 32111, a second half clamping hole is formed in the lower surface of the second clamping portion 32112, and the first half clamping hole and the second half clamping hole correspondingly form a clamping hole 3213 suitable for interference fit with the periphery of the pipe; the driving member 3212 is connected to the first and/or

second clamping portions

32111, 32112 and is adapted to drive the first and

second clamping portions

32111, 32112 to move toward or away from each other to clamp or release the pipe.

In the above scheme, the pipe is clamped through the clamping hole 3213 formed by the first clamping portion 32111 and the second clamping portion 32112, so that not only is the clamping and positioning effect good, but also the pipe is not damaged, and the clamping member 3211 makes the whole clamping assembly 321 simpler in structure, and more convenient and efficient to control by adopting the above structural design.

Optionally, rubber pads are respectively arranged on the inner surfaces of the first half clamping hole and the second half clamping hole, so that friction between the clamping hole 3213 and the pipe can be increased, and the pipe can be prevented from being damaged by the first clamping portion 32111 and the second clamping portion 32112 in the process of clamping the pipe.

Optionally, in this embodiment, the driving element 3212 is connected to the second clamping portion 32112 and adapted to drive the second clamping portion 32112 to move toward or away from the first clamping portion 32111, so as to clamp or release the tubular.

Alternatively, as shown in fig. 8 and 9, the first and

second clamping portions

32111 and 32112 are respectively clamping plates having a set extension length; a plurality of groups of clamping holes 3213 are formed at intervals between the first clamping portion 32111 and the second clamping portion 32112 along the length direction of the clamping member 3211, so that a plurality of pipes can be fed secondarily at the same time.

Optionally, the driving member 3212 is an air cylinder, and an output end of the air cylinder is connected to the second clamping portion 32112 and can drive the second clamping portion 32112 to move up and down to clamp or release the pipe.

Optionally, the driving members 3212 are provided in plurality at intervals along the length direction of the clamping member 3211, and the driving members 3212 simultaneously drive the second clamping portions 32112, so that the second clamping portions 32112 can move smoothly, the clamping force of each clamping hole 3213 is effectively ensured to be uniform, a pipe is firmly fixed, and partial loosening of the pipe due to unbalanced distribution of the driving members 3212 and too small local clamping force is avoided.

In this embodiment, the secondary feeding driving assemblies 322 include two driving cylinders, and the secondary feeding driving assemblies 322 are disposed at two ends of the clamping assembly 321.

Specifically, the clamping assembly 321 further includes a supporting plate, the first clamping portion 32111 is fixedly disposed on the supporting plate, the driving member 3212 may be fixedly mounted on the supporting plate or the first clamping portion 32111, the supporting plate is a strip-shaped plate, a sliding plate capable of sliding along the length direction of the frame 100 is fixedly disposed on the bottom surfaces of the two ends of the supporting plate, respectively, the driving cylinder is fixed on the frame 100, and the output end of the driving cylinder is connected to the sliding plate, and is adapted to drive the sliding plate to drive the entire clamping assembly 321 to move along the length direction of the frame 100.

Alternatively, in an embodiment, a guide rail slidably engaged with the sliding plate may be fixedly disposed on the frame 100, or in another embodiment, a guide rail adapted to slidably engage with the sliding plate is disposed on a top wall of a housing of the driving cylinder, and the length of the housing is greater than the distance of the secondary feeding, the guide rail extends along the length direction of the frame 100, the sliding plate is slidably connected to the top wall of the housing, the entire clamping assembly 321 is mounted above the driving cylinder, a piston rod of the driving cylinder is adapted to extend and contract along the length direction of the frame 100 and is connected to a side of the sliding plate close to the bending mechanism 50, and the driving cylinder is adapted to drive the entire clamping assembly 321 to approach or separate from the bending mechanism 50 through extension and contraction of the piston rod. Optionally, the piston rod and the sliding plate may be fixedly connected by a longitudinal connecting plate.

Alternatively, the driving cylinder is supported and fixed on the frame 100 by two legs.

Further, as shown in fig. 1 to 4 and 6, the primary feeding mechanism 31 includes a cutting clamp die and a cutting clamp cylinder 311. The feeding mechanism 30 still including setting up the belt feeding subassembly 33 between feeding mechanism 31 and the secondary feeding mechanism 32 once, belt feeding subassembly 33 includes two sets of belt pulleys that the interval set up from top to bottom, and every group belt pulley includes two belt pulleys that the interval set up and the belt of cover between two belt pulleys, and tubular product passes from between two belts to can realize that two belts clip tubular product conveying through the rotation of belt pulley tubular product, during a pay-off, open material die clamping cylinder 311 drive and open material die clamping and press from both sides the tubular product of treating bending, under the clamping action of open material die clamping and two belts drags, the conveying forward tubular product. During secondary feeding, the material cutting and clamping module of the primary feeding mechanism 31 releases the pipe, the clamping assembly 321 of the secondary feeding mechanism 32 clamps the pipe, and the two belts can also rotate to assist the secondary feeding mechanism 32 to convey the pipe forwards.

Optionally, the bender further comprises: the intercepting mechanism 40 is arranged between the feeding mechanism 30 and the bending mechanism 50 and is suitable for intercepting the pipe conveyed to the rack 100 by a set length to obtain the pipe to be bent; the primary feeding mechanism 31 is arranged at the side close to the intercepting mechanism 40, and the secondary feeding mechanism 32 is arranged at the side far from the intercepting mechanism 40.

Optionally, the intercepting mechanism 40 comprises a cutting component 41, and the cutting component 41 comprises a cutter head, a cutter groove for the pipe to pass through is formed in the center of the cutter head, and the cutter head is suitable for performing annular cutting on the pipe at a set cutting position without cutting off the pipe. The cutter head is used for cutting the pipe without cutting off the pipe, so that the follow-up secondary feeding step is facilitated, and the pipe orifice can be effectively prevented from being easily collided and rubbed with other parts to cause damage in the secondary feeding process after the pipe is cut off.

Further, the cutting assembly 41 further comprises a feed cylinder, the feed cylinder is suitable for controlling the distance from a blade of a cutter head of the cutter to the notch of the cutter groove, so that the depth of the cut can be accurately controlled, the pipe can be cut off when being cut, and the pipe is conveniently pushed by the secondary feeding mechanism 32 to be secondarily fed. The intercepting mechanism 40 further comprises a cutter frame and a cutter motor 42 which is arranged on the cutter frame and is suitable for driving the cutter head to rotate, and the tubular product is cut in an annular mode by controlling the rotary feeding of the cutter head, so that the secondary feeding mechanism 32 can be more easily and labor-saving when the tubular product is broken at the cutting position.

Further, as shown in fig. 1, fig. 2 and fig. 5, the bending mechanism 50 further includes a bending wheel rotatable around the bending shaft 501, and a bending clamping mechanism, a bending servo 52, a photoelectric detection sensor and a core rod 51, the bending clamping mechanism is used for clamping and fixing the pipe to be bent in the process of breaking the pipe and bending the pipe, the bending clamping mechanism includes a bending clamping cylinder 53 and a bending clamping die, and the bending clamping cylinder 53 is used for controlling the bending clamping die to clamp and fix the pipe in the bending process. The core rod 51 is provided with a flat head, the core rod 51 is suitable for being inserted into the pipe to be bent, and the flat head is positioned at the bending position of the pipe, so that when the bending mechanism 50 bends the pipe, the flat head can prevent the bending position of the pipe from being flat. The pipe to be bent is bent under the action of the pipe bending wheel on the bending shaft 501, the bending servo 52 is suitable for controlling the pipe bending wheel and the bending shaft 501 to bend the pipe to be bent for 180 degrees, the photoelectric detection sensor is suitable for feeding back a signal to a control system of the pipe bending machine when detecting that the bending is finished, and the control system controls the bending mechanism 50 to stop the bending action and controls the mechanisms to reset to wait for executing a next bending instruction.

Optionally, as shown in fig. 1, fig. 2 and fig. 5, the pipe bending machine further includes an in-place detection mechanism 90, the in-place detection mechanism 90 is disposed on a side of the bending mechanism 50 away from the feeding mechanism 30, and is adapted to feed back a signal to a control system of the pipe bending machine when the pipe to be bent moves to the first position and/or the second position, and the control system of the pipe bending machine correspondingly controls the primary feeding mechanism 31 and the secondary feeding mechanism 32 to stop feeding according to the signal fed back by the in-place detection mechanism 90, so as to ensure accurate positioning of the bending position, and enable the position of the pipe to be bent when entering the bending mechanism 50 to be more accurate, so as to achieve more accurate processing precision, improve production efficiency and processing quality, and ensure product yield.

Optionally, the pipe bending machine further includes a material returning mechanism 60 disposed on a side of the bending mechanism 50 away from the feeding mechanism 30, and the material returning mechanism 60 is disposed on the rack 100 and is configured to move the bent pipe out of the rack 100. The in-place detection mechanism 90 is a position detection switch or a position detection sensor arranged on the material returning mechanism 60.

Specifically, the material returning mechanism 60 includes a plurality of push rods movably disposed on the rack 100 to return a plurality of bent tubes at the same time; the push rods and the pipes are arranged in a one-to-one correspondence mode, and the end portions of the push rods are opposite to the end portions of the pipes so that the pipes are pushed to move when the push rods move. The material returning mechanism 60 further comprises a strip-shaped sliding block and a material returning driving mechanism, the push rods are arranged on the sliding block respectively, and the material returning driving mechanism drives the strip-shaped sliding block to move so that the push rods push the pipes to return simultaneously.

Optionally, material returned actuating mechanism includes driving motor and material returned lead screw 61, be equipped with the connecting hole of taking the screw thread in the slider, slider threaded connection is in on the material returned lead screw 61, driving motor makes the slider along material returned lead screw 61 removes through the rotation of drive material returned lead screw 61, thereby realizes driving the push rod removes and carries out the material returned.

Optionally, the machine frame 100 is further provided with a guide rod for guiding the sliding block to move along the length direction of the machine frame 100.

Optionally, the in-position detection mechanism 90 is provided on the slider or the push rod. When the pipe to be bent is detected to move to the first position, the in-place detection mechanism 90 feeds back a signal to a control system of the pipe bending machine, then the control system of the pipe bending machine controls the material returning mechanism 60 to move for a set distance in a direction away from the bending mechanism 50, and the in-place detection mechanism 90 moves backwards to leave a space, so that the tail end of a secondary feeding pipe cannot push against the material returning mechanism 60 to damage the pipe. The distance of the retreat of the in-place detection mechanism 90 is equal to or slightly greater than the secondary feeding distance.

Optionally, as shown in fig. 1 and fig. 2, the tube bender further includes a feeding mechanism 10, the feeding mechanism 10 is disposed on a side of the rack 100 close to the feeding mechanism 30, and is used for conveying the tube from the tube storage area to the rack 100; the straightening and rounding mechanism 20 is arranged between the feeding mechanism 10 and the feeding mechanism 30 and is used for straightening and rounding the pipe conveyed from the feeding mechanism 10; the feeding mechanism 30 is located between the straightening and rounding mechanism 20 and the bending mechanism 50, the secondary feeding mechanism 32 is arranged at the side close to the straightening and rounding mechanism 20, and the primary feeding mechanism 31 is arranged at the side close to the bending mechanism 50. Through the straightening and rounding mechanism 20, various structural parameters of the pipe fitting can be effectively ensured to meet set standards.

Optionally, as shown in fig. 1 and fig. 2, the pipe bending machine further includes a material returning receiving mechanism 80 disposed between the intercepting mechanism 40 and the bending mechanism 50, the material returning receiving mechanism 80 is a belt line assembly, the belt line assembly includes two belt lines disposed at intervals along the length direction of the rack 100, one belt line is fixedly disposed, the other belt line is movably disposed along the length direction of the rack 100, an interval between the two belt lines is adjustable, the interval between the two belt lines can be adjusted through servo driving, the servo driving is adapted to adjust the interval between the two belt lines according to the length of the bent pipe, the distance is widened when the pipe is long, and the distance is narrowed when the pipe is short, so as to ensure that the material returning receiving mechanism 80 can effectively hold pipes of different sizes.

Optionally, the pipe bender further comprises a guiding mechanism 70, wherein the guiding mechanism 70 is disposed between the feeding mechanism 10 and the rack 100 to guide the pipe outputted from the feeding mechanism 10 to the rack 100 for processing.

In this embodiment, the tube includes, but is not limited to, a copper tube.

The pipe bending machine provided by the embodiment has the advantages that through the design of the secondary feeding mechanism 32, a common pipe bending machine has double functions, a U-shaped pipe with equal height can be bent, a U-shaped pipe with a certain fall and unequal height can also be bent, a pipe bending machine capable of bending the U-shaped pipe with unequal height is not required to be bought independently, the field and the cost are saved, the use experience is improved in a breakthrough manner, meanwhile, the whole process of the pipe bending machine provided by the invention is automatic, the automation degree is higher, the production efficiency is greatly improved, the labor intensity is reduced, the pipe bending machine has the advantages of being multifunctional, saving in utilization, stable in production, convenient to use, reducing the labor cost and the like, and the problems that the existing pipe bending machine is single in function, poor in flexibility, consuming time and labor are solved.

Example two

The present embodiment provides a pipe bending method applied to the pipe bender in the first embodiment, where the pipe bending method includes the following steps:

s101, feeding once, wherein the once feeding mechanism 31 is controlled to move the pipe to be bent to a first position with the same length relative to the two sides of the bending shaft 501 of the bending mechanism 50;

s201, secondary feeding, wherein the secondary feeding mechanism 32 is controlled to drive the pipe to move continuously and move to a second position which is different from the lengths of the two sides of the bending shaft 501;

and S301, bending, namely controlling the bending mechanism 50 to act to bend the pipe to be bent so as to enable two ends of the bent pipe to generate a set height difference.

In the pipe bending method, the secondary feeding driving assembly 322 drives the clamping assembly 321, and after the primary feeding is finished, the secondary feeding is performed, so that the lengths of the two ends of the bent pipe fitting generate a fall. The utility model has the advantages of make the U type pipe both ends after buckling form certain difference in height to can satisfy diversified demand, the secondary pay-off also makes the pay-off distance extension simultaneously, and this just makes the tubular product length of treating to bend suitably shorten, thereby can realize the U type pipe fitting that the curved total length is shorter, increases the curved long scope of managing.

s102, cutting, namely cutting the pipe at a set cutting position without cutting off the pipe;

the step of cutting the pipe at the set cutting position without cutting off is executed after the primary feeding step and before the secondary feeding step, so that the subsequent secondary feeding step is facilitated, and the problem that the pipe orifice is easy to collide and rub with other parts to cause damage in the secondary feeding process after the pipe is cut off can be effectively avoided.

Optionally, the following steps are performed after the secondary feeding step and before the bending step:

s202, snapping, namely clamping the pipe from two ends by the bending mechanism 50 and the secondary feeding mechanism 32, and then controlling the secondary feeding mechanism 32 to move towards the direction far away from the bending mechanism 50 so as to snap the pipe at the cutting position, thereby obtaining the pipe to be bent.

Specifically, the bending clamping mechanism clamps one end of the pipe to be bent, and the clamping assembly 321 of the secondary feeding mechanism 32 clamps the other end of the pipe, it should be noted that the pipe includes a pipe section to be bent and a remaining pipe section, the secondary feeding mechanism 32 is clamped on the remaining pipe section, and the cutting position is located between the two clamping positions, so that the pipe can be snapped from the middle cutting position. The secondary feeding mechanism 32 can not only continuously push the pipe to be bent for a set distance to realize secondary feeding, but also can reversely move to assist in snapping off and cutting the pipe to be bent, and the pipe to be bent has multiple purposes.

In another embodiment, the tube is not pulled off by the secondary feeding mechanism 32, and after the secondary feeding step and before the bending step, the cutting assembly 41 is controlled to cut off the tube at the cutting position, that is, the knife rest is controlled to move forward for a set distance, then the cutter motor 42 is started, the feed cylinder moves forward, the cutter head cuts off the copper tube, and then the knife rest moves backward again.

The following takes bending a copper pipe as an example, and details the whole working process of the pipe bender in this embodiment with reference to fig. 1 to 11;

the feeding mechanism 10 starts feeding, the frame 100 of the pipe bender is unfolded to receive materials, the straightening and rounding mechanism 20 conducts straightening and rounding processing on the copper pipe, then the intercepting mechanism 40 cuts the copper pipe, attention needs to be paid at the moment, the cut copper pipe cannot be cut off, and secondary feeding is conducted conveniently. During feeding of the feeding mechanism 30, the copper tube will move along the core rod 51, and feeding will not be stopped until the in-position detection mechanism 90 is touched. After the copper tube sleeved on the core rod 51 moves to the first position with the same length on the left and right sides, the primary feeding mechanism 31 stops moving, the secondary feeding mechanism 32 acts to clamp the copper tube for the second time and then continue feeding, so that the copper tube moves to the second position with inconsistent length relative to the two ends of the bending shaft 501, and attention needs to be paid to the fact that the in-place detection mechanism 90 and the material returning mechanism 60 need to retreat at this time to avoid ejecting the damaged copper tube. The copper pipe is moved again by controlling the secondary feeding mechanism 32 so that the left length and the right length of the copper pipe are different, then the secondary feeding mechanism 32 returns to the original position and moves towards the direction far away from the bending mechanism 50, the copper pipe is broken at the cutting position along with the movement, and then the bending process is executed. Preferably, the retreating distance of the in-place detection mechanism 90 is the same as the secondary feeding distance or slightly longer than the secondary feeding distance, so that the pipe fitting with high and low fall after bending is realized. Then, the bending clamping mechanism clamps the copper pipe, the bending servo 52 moves to bend the copper pipe by 180 degrees, the bending servo can stop when the photoelectric detection sensor detects a signal, and then the material returning mechanism 60 pushes the copper pipe away from the bending mechanism 50 and falls onto the material returning and receiving mechanism 80 to complete the bending of the U pipe.

In the above process, after the copper pipe is bent, because the material returning mechanism 60 is located below and the push rod moves towards the direction close to the bending shaft 501 to push the copper pipe away from the core rod 51, the bent U-shaped copper pipe must be designed to be long below and short above, so that the push rod can be ensured to touch the copper pipe during material returning, and the phenomenon that the material cannot be returned due to the fact that the push rod is too short below and cannot touch the copper pipe cannot occur.

The whole equipment operation flow is as follows: the method comprises the steps of firstly starting up the equipment, then initializing the equipment, returning to the original point in a manual mode, then opening an automatic switch, and enabling the equipment to enter a cycle. Feeding by a feeding mechanism 10, flatly placing a rack 100 to wait for receiving materials, moving a tool rest forward, clamping a copper pipe by a primary feeding mechanism 31, rotating a belt pulley, wrapping and feeding the copper pipe by a belt, shaping the copper pipe by penetrating through a core rod 51 on the rack 100, controlling a cutting assembly 41 to rotate to cut a notch by a cutter motor 42 after all the copper pipes touch an in-place detection mechanism 90, moving a secondary feeding mechanism 32 to move forward, enabling the pipe to continue to move forward, enabling the distance between the two sides of the copper pipe and a bending shaft 501 to form a certain difference, driving a bending clamping cylinder 53 to bend and clamp the pipe by a bending clamping die, moving a bending servo 52 to bend the pipe, determining a bending angle according to process requirements, driving the bent U-shaped copper pipe to move by a material returning mechanism 60 after the pipe is bent, separating the copper pipe from the core rod 51, and finishing the manufacturing of the pipe.

Compared with a traditional long U-shaped pipe bending machine, the pipe bending machine provided by the embodiment has the advantages that the bending pipe length range is increased, the shortest copper pipe with the length of 126mm can be bent, the height difference can reach 65-130mm, one device can meet various requirements, the long U-shaped pipe bending machine with the height difference does not need to be bought independently, the cost is saved, and the automation degree is higher.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A bender, comprising:

a frame (100);

the bending mechanism (50) is arranged on the rack (100) and comprises a bending shaft (501) for bending the pipe;

the feeding mechanism (30) comprises a primary feeding mechanism (31) and a secondary feeding mechanism (32) which are arranged on the rack (100) and are suitable for conveying the pipes to the bending mechanism (50);

wherein: the primary feeding mechanism (31) is suitable for driving the pipe to be bent to move to a first position with the same length relative to the two sides of the bending shaft (501);

the secondary feeding mechanism (32) is suitable for driving the pipe to be bent to move continuously and move to a second position which is different from the bending shaft (501) in length on two sides, so that a set height difference is generated at two ends of the pipe to be bent after the pipe to be bent is bent by the bending mechanism (50).

2. The bender according to claim 1, wherein the secondary feed mechanism (32) comprises:

the clamping assembly (321) comprises a clamping piece (3211) and a driving piece (3212) for driving the clamping piece (3211) to clamp or release the pipe;

and the secondary feeding driving assembly (322) is suitable for driving the clamping assembly (321) to move towards or away from the bending mechanism (50).

3. The bender according to claim 2, characterized in that the clamp (3211) comprises:

the upper surface of the first clamping part (32111) is provided with a first half clamping hole;

the second clamping part (32112) is arranged above the first clamping part (32111), a second half clamping hole is formed in the lower surface of the second clamping part (32112), and the first half clamping hole and the second half clamping hole correspondingly form a clamping hole (3213) which is suitable for being in interference fit with the periphery of the pipe;

the driving piece (3212) is connected with the first clamping part (32111) and/or the second clamping part (32112) and is suitable for driving the first clamping part (32111) and the second clamping part (32112) to move close to or away from each other so as to clamp or release the pipe.

4. The bender according to claim 3, characterized in that the first and second clamps (32111, 32112) are each a clamp having a set extension;

a plurality of sets of clamping holes (3213) are formed at intervals between the first clamping portion (32111) and the second clamping portion (32112) along the length direction of the clamping member (3211).

5. The bender according to any of claims 1-3, further comprising:

the intercepting mechanism (40) is arranged between the feeding mechanism (30) and the bending mechanism (50) and is suitable for intercepting the pipe conveyed to the rack (100) by a set length so as to obtain the pipe to be bent;

the primary feeding mechanism (31) is arranged on the side close to the intercepting mechanism (40), and the secondary feeding mechanism (32) is arranged on the side far away from the intercepting mechanism (40).

6. The bender according to claim 5, characterized in that said intercepting means (40) comprises:

the cutting assembly (41), the cutting assembly (41) includes the cutter tool bit, cutter groove that the cutter tool bit center formed can supply the tubular product to pass, the cutter tool bit is suitable for setting for the cutting position to carry out annular cutting but not cutting off to the tubular product.

7. The bender according to any of claims 1-3, further comprising:

the in-place detection mechanism (90) is arranged on one side, away from the feeding mechanism (30), of the bending mechanism (50) and is suitable for feeding back signals to a control system of the pipe bending machine when the pipe to be bent moves to the first position and/or the second position.

8. The bender according to any of claims 1-3, further comprising:

the feeding mechanism (10) is arranged on one side, close to the feeding mechanism (30), of the rack (100) and is used for conveying the pipes from the pipe storage area to the rack (100);

the straightening and rounding mechanism (20) is arranged between the feeding mechanism (10) and the feeding mechanism (30) and is used for straightening and rounding the pipe conveyed from the feeding mechanism (10);

the feeding mechanism (30) is located between the straightening and rounding mechanism (20) and the bending mechanism (50), the secondary feeding mechanism (32) is arranged on the side close to the straightening and rounding mechanism (20), and the primary feeding mechanism (31) is arranged on the side close to the bending mechanism (50).

9. A pipe bending method applied to the pipe bending machine according to any one of claims 1 to 8, wherein the pipe bending method comprises the following steps:

feeding once, wherein the once feeding mechanism (31) is controlled to move the pipe to be bent to a first position corresponding to the two sides of the bending shaft (501) of the bending mechanism (50) and having the same length;

secondary feeding, wherein the secondary feeding mechanism (32) is controlled to drive the pipe to move continuously and move to a second position which is different from the bending shaft (501) in length on two sides;

and bending, wherein the bending mechanism (50) is controlled to act to bend the pipe to be bent, so that a set height difference is generated at two ends of the bent pipe.

10. The tube bending method of the tube bender according to claim 9, wherein the following steps are performed after the primary feeding step and before the secondary feeding step:

and (3) snapping, namely clamping the pipe from two ends by the bending mechanism (50) and the secondary feeding mechanism (32), and then controlling the secondary feeding mechanism (32) to move towards the direction far away from the bending mechanism (50) so as to snap the pipe at the cutting position, thereby obtaining the pipe to be bent.