CN214290224U

CN214290224U - Pipe bending machine for copper pipe used by evaporator of air cooler

Info

Publication number: CN214290224U
Application number: CN202022413241.2U
Authority: CN
Inventors: 吴代华
Original assignee: Zhangjiagang Huao Special Refrigeration Equipment Co ltd
Current assignee: Zhangjiagang Huao Special Refrigeration Equipment Co ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-09-28
Anticipated expiration: 2030-10-27

Abstract

The utility model relates to a bending machine of used copper pipe of evaporimeter of air-cooler, it includes correction system, cutting system, return bend system. The utility model can not only ensure the straightness of the copper pipe, but also further improve the roundness of the copper pipe, and simultaneously ensure the correction quality of the copper pipe under the verification of the verification channel so as to meet the requirement of the uniformity of the wall thickness of the elbow pipe; on the other hand is under the location of design passageway, when reducing greatly and buckling, the deformation of the straight tube that causes keeps under the parallel state through two hem mould strips simultaneously, by the deflection of arc matching groove restriction copper pipe when buckling, and then improves elbow department circularity for the wall thickness of elbow is relatively even, so, reduces the probability of warping or leaking, and then the life of extension self and compressor, the disability rate when also reducing the return bend simultaneously by a wide margin, simple structure, it is convenient to implement, and with low costs.

Description

Pipe bending machine for copper pipe used by evaporator of air cooler

Technical Field

The utility model belongs to the air-cooler field, concretely relates to bending machine of used copper pipe of evaporimeter of air-cooler.

Background

The air cooler is divided into an industrial air cooler and a household air cooler, the industrial air cooler is generally used in a refrigeration house and a cold chain logistics refrigeration environment, the household air cooler is also called as a water-cooled air conditioner, and the air cooler is an evaporative cooling and ventilating unit integrating cooling, ventilating, dust prevention and smell removal.

However, in the preparation process of the evaporator of the air cooler, a copper pipe is required to be used for the corresponding medium to flow in a circuitous manner so as to achieve the effect of sufficient heat exchange, and therefore, the copper pipe is required to be bent.

At present, the most commonly used bending pipe is formed by aligning the bending position with the bending center from the inner side wall, and applying an acting force to the outer side end of the copper pipe by taking the bending center as the center of a circle to force the copper pipe to bend and deform inwards around the bending center to form an elbow.

Obviously, the bending mode is not suitable for bending copper pipes (generally, the wall thickness is about 2 mm), and the specific embodiment is as follows:

1) the copper pipe belongs to a deformable product, when acting force is applied to the outer side of the copper pipe, not only the contact position of the acting force can cause the deformation of the copper pipe, but also the deformation can be caused in the bending center in the arc thickness direction, so that the roundness of the elbow is obviously reduced, the wall thickness of the elbow is not uniform (namely, the thickness is not uniform), the weak part can deform under high pressure provided by a compressor to cause medium transmission obstruction, the service power of the compressor is increased, the service life of the compressor is shortened, and the leakage of a medium is easily caused;

2) the location of copper pipe is also very important, when inwards buckling, can produce outside effort, if location tip and buckle between the center nothing set up, will lead to the deformation of this section straight tube, causes the deviation of the angle of buckling, influences the mobility of medium.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome prior art not enough, provide a used bending machine of copper pipe of evaporimeter of modified air-cooler.

For solving the technical problem, the utility model discloses take following technical scheme:

a bending machine for a copper pipe used for an evaporator of an air cooler comprises:

the correcting system comprises a plurality of first straightening rollers which are positioned in the left-right direction of the copper pipe and form a first straightening channel, a plurality of second straightening rollers which are positioned in the up-down direction of the copper pipe and form a second straightening channel, a shaping unit and a verification unit which are positioned at the discharge end part of the copper pipe of the second straightening channel, wherein the center of the copper pipe is coincided with the center of an equilateral triangle and penetrates through the verification channel; the top surfaces of the lower rows of shaping rollers are flush and are upwards propped against the inner ring at the upper part of the lower annular belt, and a shaping channel matched with the outer diameter of the copper pipe is formed between the upper annular belt and the lower annular belt corresponding to the upper rows of shaping rollers and the lower rows of shaping rollers; the verification unit comprises a mounting seat, a verification supporting roller and a verification pressing roller which can freely rotate around the axis of the verification supporting roller and the verification pressing roller, wherein a verification channel is formed between the verification supporting roller and the verification pressing roller and is aligned with the shaping channel, three contact points are formed between the verification channel and the copper pipe, the three contact points form an equilateral triangle, and the center of the copper pipe and the center of the equilateral triangle are overlapped and penetrate through the verification channel;

the pipe bending system comprises a pipe bending positioning unit and a pipe bending power unit, wherein the pipe bending positioning unit is used for positioning a copper pipe and comprises a multi-jaw chuck, a driving part and a shaping auxiliary part, the driving part drives the multi-jaw chuck to move transversely in a horizontal coordinate system along the X axis and the Y axis, the X axis is the length direction of the copper pipe, the shaping auxiliary part forms a shaping channel for the copper pipe to pass through, and the shaping channel is positioned between the multi-jaw chuck and a bending area and is close to the bending area; the bending power unit is used for applying acting force to the copper pipe to force the copper pipe to deform and bend, and comprises a first bending part and a second bending part which are positioned on the left side and the right side of the copper pipe and are distributed in a bending area in a staggered mode, and a power part for driving the first bending part and the second bending part to synchronously rotate or reset around the vertical direction, wherein the first bending part comprises a first wheel disc and a first flanging die strip, the first wheel disc is vertically arranged on the axis, the first flanging die strip linearly extends from the tangential direction of the first wheel disc, and a first arc-shaped matching groove matched with the outer diameter of the copper pipe is formed in the end face, in contact with the copper pipe, of the first wheel disc and the first flanging die strip; the second bending part is the same as the first bending part in structure, a second wheel disc, a second flanging die strip and a second arc-shaped matching groove are correspondingly formed, the first flanging die strip and the second flanging die strip are arranged in parallel, and the first flanging die strip and the second flanging die strip are respectively attached to two opposite sides of the copper pipe from the first arc-shaped matching groove and the second arc-shaped matching groove in a staggered mode.

And the cutting system is positioned between the correcting system and the bent pipe system and is used for cutting the copper pipe according to the set size.

Preferably, the verification support roller is inwards recessed from the surface of the roller to form a V-shaped roller groove, the copper pipe is contacted with two opposite sides of the V-shaped roller groove from the lower part, and the upper part is abutted against the bottom surface of the verification press roller.

Furthermore, the verification supporting roller and/or the verification pressing roller are movably adjusted up and down along the vertical direction and are arranged on the mounting seat. Therefore, the verification of copper pipes with different outer diameters is met by verifying the position adjustment between the supporting roller and the verifying press roller on the premise that the center position of the equilateral triangle is not changed.

Preferably, the bottom surface of the upper row of sizing rollers and the pulley bottom surface of the upper endless belt are flush; the top surface of the lower row of the shaping rollers is flush with the top surface of the belt wheel of the lower annular belt. Therefore, the lower part of the whole upper annular belt and the upper part of the whole lower annular belt form a shaping channel, and the shaping of the copper pipe is further facilitated.

According to the utility model discloses a concrete implementation and preferred aspect, go up row of shaping roller and lower row of shaping roller longitudinal symmetry setting, and constitute every shaping roller homoenergetic of going up row of shaping roller and lower row of shaping roller and rotate the setting round self axis direction. Therefore, under the relative rotation of the shaping rollers aligned up and down, the copper pipe is convenient to transmit and micro-shaped, so that the roundness of the copper pipe is ensured.

Preferably, inner teeth are distributed on the inner rings of the upper annular belt and the lower annular belt, and the shaping roller and the belt wheel are gears matched with the inner teeth.

According to still another embodiment and preferred aspect of the present invention, the upper and lower endless belts are disposed symmetrically with respect to each other, and the upper and lower endless grooves are disposed on the outer sides of the upper and lower endless belts, respectively, and aligned with each other, wherein the upper and lower endless grooves are disposed on the lower portion of the upper endless belt and disposed on the upper portion of the lower endless belt to form a shaping passage. And a shaping channel matched with the outer diameter of the copper pipe is formed by butt-joint matching of the upper annular ring groove and the lower annular ring groove.

Preferably, the upper annular ring groove and the lower annular ring groove are correspondingly arranged in the middle of the upper annular belt and the lower annular belt. The transmission of copper pipes is facilitated.

According to another embodiment and preferred aspect of the present invention, the upper row of shaping rollers and the lower row of shaping rollers are respectively adjusted and disposed on the frame by the adjusting member moving in opposite directions with respect to the center line of the shaping passage. The copper pipe to different external diameters can be adjusted, in short, the external diameter of copper pipe can only be for diminishing, go up to arrange the shaping roller and form the plastic passageway that matches with the copper pipe external diameter down between the corresponding annular band of lower annular band of shaping roller and the upper annular band of lower row, and then strengthen the practicality of plastic unit, simultaneously, must ensure that the central line of plastic passageway and the central line coincidence of copper pipe set up.

Preferably, a sliding groove extending up and down is formed in the frame base, the upper row of shaping rollers and the lower row of shaping rollers are arranged on the sliding groove in a relatively sliding mode through the upper sliding base and the lower sliding base respectively, and the adjusting component comprises a double-threaded screw rod and a driver, wherein the double-threaded screw rod is in threaded fit with the upper sliding base and the lower sliding base respectively, and the driver drives the double-threaded screw rod to rotate so as to drive the upper sliding base and the lower sliding base to move in the opposite direction.

Furthermore, two end parts of the double-head screw penetrate out of the frame seat from the upper end part and the lower end part of the sliding groove, and the driver comprises a transmission gear arranged at one end part of the double-head screw, a driving gear meshed with the transmission gear and a motor.

In addition, a plurality of first straightening rollers positioned at two opposite sides of the first straightening channel are distributed in a staggered manner; the plurality of second straightening rollers positioned on two opposite sides of the second straightening channel are distributed in a staggered mode, and the first straightening rollers and the second straightening rollers are arranged vertically. Further ensure the straightness accuracy of copper pipe, also be convenient for subsequent plastic simultaneously.

Preferably, the shaping auxiliary part comprises a first shaping part and a second shaping part which are positioned on the left side and the right side of the copper pipe, wherein a central line of a shaping channel formed between the first shaping part and the second shaping part is superposed with a central line of the copper pipe.

Preferably, the first styling part comprises a plurality of styling rollers side by side and aligned, wherein each styling roller is free to roll around the vertical direction.

The second shaping part comprises a shaping module and an adjusting part used for driving the shaping module to move transversely along the Y-axis direction, wherein a shaping groove extending along the X-axis direction is formed in the end face of the shaping module, and a shaping channel is formed between the shaping groove and the shaping rollers.

The adjusting part comprises a guide rail extending along the length direction of the Y axis, a sliding seat arranged on the guide rail in a sliding manner, and a telescopic rod extending along the direction of the Y axis, wherein the guide rail is provided with a plurality of guide rails and distributed at intervals, the sliding seat and the sliding rail are arranged in a one-to-one correspondence manner, the shaping module is fixedly connected onto the sliding seat, and the telescopic end part of the telescopic rod is connected onto the shaping module.

According to the utility model discloses a concrete implementation and preferred aspect, the setting groove is the V type, and between the V type and the design gyro wheel that corresponds constitute one with copper pipe three point contact's design district, a plurality of design districts constitute the design passageway, wherein the steel pipe contradicts on two inside walls of V, contradicts on the design gyro wheel from left end portion from the upper and lower part on right side. And under the three-point contact shaping, the deformation of the copper pipe close to the bending area is reduced during bending.

Preferably, the three contact points form an equilateral triangle, and the centerline of the equilateral triangle coincides with the centerline of the copper tube. Ensures the stability of bending and provides conditions for uniformly bending the copper pipe.

Preferably, the second wheel disc is located at the front end of the first wheel disc, and the first flanging die strip and the second flanging die strip are bent leftwards synchronously along with the rotation of the first wheel disc and the second wheel disc.

Specifically, the angle of synchronous rotation of the first wheel disc and the second wheel disc is equal to the bending angle of the copper pipe.

In addition, the power part comprises a transmission part for synchronously connecting the first wheel disc and the second wheel disc and a motor for driving the first wheel disc or the second wheel disc to rotate.

Due to the implementation of the above technical scheme, compared with the prior art, the utility model have the following advantage:

the utility model can not only ensure the straightness of the copper pipe, but also further improve the roundness of the copper pipe, and simultaneously ensure the correction quality of the copper pipe under the verification of the verification channel so as to meet the requirement of the uniformity of the wall thickness of the elbow pipe; on the other hand is under the location of design passageway, when reducing greatly and buckling, the deformation of the straight tube that causes keeps under the parallel state through two hem mould strips simultaneously, by the deflection of arc matching groove restriction copper pipe when buckling, and then improves elbow department circularity for the wall thickness of elbow is relatively even, so, reduces the probability of warping or leaking, and then the life of extension self and compressor, the disability rate when also reducing the return bend simultaneously by a wide margin, simple structure, it is convenient to implement, and with low costs.

Drawings

The invention will be described in further detail with reference to the following drawings and specific embodiments:

fig. 1 is a schematic front view of a pipe bender of the present invention;

FIG. 2 is an enlarged schematic view of the orthotic system of FIG. 1;

FIG. 3 is an enlarged schematic view of the elbow system of FIG. 1;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic view of the elbow system of FIG. 3 in a bent state (right angle bend);

wherein: firstly, a correction system; 1. a first straightening roller; 2. a second straightening roller; 3. a shaping unit; 30. a frame seat; 300. a chute; 31. an upper endless belt; 32. a lower endless belt; 33. an upper row of sizing rollers; 34. a lower row of sizing rollers; 35. an adjustment member; 350. a double-ended screw; 351. a driver; a. a transmission gear; b. a drive gear; c. a motor; 36. an upper slide base; 37. a lower slide base; 4. a verification unit; 40. a mounting seat; 400. mounting grooves; 401. a guide bar; h1, a first slider; h2, a second slide; 41. verifying the supporting roller; 42. verifying the compression roller;

② cutting the system;

thirdly, a pipe bending system; A. a bent pipe positioning unit; a1, multi-jaw chuck; a2, a driving part; a3, a shaping auxiliary piece; a31, a first shaped part; 310. shaping rollers; a32, a second shaping part; 320. a shaping module; 321. an adjustment member; a', a guide rail; b', a sliding seat; c', a telescopic rod; B. a pipe bending power unit; b1, a first bending member; b11, a first wheel disc; b12, a first flanging die strip; c1, a first arc matching groove; b2, a second bending member; b21, a second wheel disc; b22, a second flanging die strip; c2, a second arc matching groove; b3, a power component; b30, a transmission component; b31, a motor;

G. copper tubing.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, the pipe bender for copper pipes used in the evaporator of an air cooler includes a correction system (i), a cutting system (ii), and a pipe bending system (iii), wherein the cutting system (ii) is located between the correction system (i) and the pipe bending system (iii) and is used for cutting the copper pipes according to a set size.

Referring to fig. 2, the straightening system includes a plurality of first straightening rollers 1 located in the left-right direction of the copper tube G and forming a first straightening channel, a plurality of second straightening rollers 2 located in the up-down direction of the copper tube G and forming a second straightening channel, a shaping unit 3 located at the copper tube discharge end of the second straightening channel, and a verification unit 4, wherein the copper tube G moves from the first straightening channel to the second straightening channel and sequentially passes through the shaping unit 3 and the verification unit 4.

In this example, a plurality of first straightening rollers 1 positioned at two opposite sides of the first straightening channel are distributed in a staggered manner; the plurality of second straightening rollers 2 positioned on two opposite sides of the second straightening channel are distributed in a staggered mode, and the first straightening rollers 1 and the second straightening rollers 2 are arranged vertically. Further ensure the straightness accuracy of copper pipe, also be convenient for subsequent plastic simultaneously.

The shaping unit 3 comprises a frame seat 30, an upper annular belt 31 and a lower annular belt 32 which are arranged in parallel up and down, and an upper row of shaping rollers 33 and a lower row of shaping rollers 34 which are respectively arranged inside the upper annular belt 31 and the lower annular belt 32, wherein the bottom surfaces of the upper row of shaping rollers 33 are flush, and the upper row of shaping rollers are pressed downwards on an inner ring at the lower part of the upper annular belt 31; the top surfaces of the lower row of shaping rollers 34 are flush and are propped up against the inner ring at the upper part of the lower annular belt 32, and shaping channels matched with the outer diameter of the copper pipe G are formed between the upper annular belt 31 and the lower annular belt 32 corresponding to the upper row of shaping rollers 33 and the lower row of shaping rollers 34.

In this example, the bottom surface of the upper row of sizing rollers 33 is flush with the bottom surface of the belt pulley of the upper endless belt 31; the top surface of the lower row of sizing rollers 34 is flush with the top surface of the pulleys of the lower endless belt 32. Therefore, the lower part of the whole upper annular belt and the upper part of the whole lower annular belt form a shaping channel, and the shaping of the copper pipe is further facilitated.

The upper row of shaping rollers 33 and the lower row of shaping rollers 34 are arranged in an up-down symmetrical manner, and each shaping roller constituting the upper row of shaping rollers 33 and the lower row of shaping rollers 34 can be arranged in a manner of rotating around the axis direction thereof. Therefore, under the relative rotation of the shaping rollers aligned up and down, the copper pipe is convenient to transmit and micro-shaped, so that the roundness of the copper pipe is ensured.

Inner teeth are distributed on the inner rings of the upper annular belt 31 and the lower annular belt 32, and the shaping roller and the belt wheel are gears matched with the inner teeth.

In this example, the upper and lower

endless belts

31 and 32 are disposed symmetrically up and down, and an upper and a lower endless grooves are disposed in alignment up and down on the outer circumference of the upper and lower endless belts, respectively, wherein the upper and lower endless grooves form a shaping channel between the lower portion of the upper endless belt and the upper portion of the lower endless belt. And a shaping channel matched with the outer diameter of the copper pipe is formed by butt-joint matching of the upper annular ring groove and the lower annular ring groove.

The upper and lower annular ring grooves are correspondingly provided in the middle of the upper and lower

annular belts

31 and 32. The transmission of copper pipes is facilitated.

Further, the upper row of reforming rollers 33 and the lower row of reforming rollers 34 are moved toward each other by an adjusting member 35 with reference to the center line of the reforming passage, and are adjusted and set on the frame 30. The copper pipe to different external diameters can be adjusted, in short, the external diameter of copper pipe can only diminish, form the plastic passageway that matches with the copper pipe external diameter between the corresponding annular area 31 of last row of plastic roller 33 and lower row of plastic roller 34 and the lower annular area 32, and then strengthen the practicality of plastic unit, simultaneously, must ensure that the central line of plastic passageway and the central line coincidence of copper pipe set up.

The frame base 30 is provided with a sliding groove 300 extending up and down, the upper shaping roller 33 and the lower shaping roller 34 are arranged on the sliding groove 300 through the upper sliding base 36 and the lower sliding base 37 in a relative sliding manner, and the adjusting component 35 comprises a double-threaded screw 350 in threaded fit with the upper sliding base 36 and the lower sliding base 37 respectively and a driver 351 for driving the double-threaded screw 350 to rotate so as to drive the upper sliding base 36 and the lower sliding base 37 to move towards each other.

Both ends of the double screw 350 are extended out of the holder 30 from the upper and lower ends of the chute 300, and the driver 351 includes a transmission gear a provided at one end of the double screw 351, and a driving gear b and a motor c engaged with the transmission gear a.

The verification unit 4 comprises a mounting seat 40, a verification supporting roller 41 and a verification pressing roller 42 which can freely rotate around the axis of the verification supporting roller 41 and the verification pressing roller 42, wherein a verification channel is formed between the verification supporting roller 41 and the verification pressing roller 42, the verification channel is aligned with the shaping channel, three contact points are formed between the verification channel and the copper pipe G, the three contact points form an equilateral triangle, and the center of the copper pipe and the center of the equilateral triangle coincide and pass through the verification channel.

In this example, the verification support roller 41 is recessed inward from the roller surface to form a V-shaped roller groove, the copper tube G contacts the opposite sides of the V-shaped roller groove from the lower portion, and the upper portion abuts against the bottom surface of the verification pressure roller 42.

Specifically, a verification support roller 41 and a verification pressure roller 42 are movably adjusted up and down in the vertical direction on the mount 40. Therefore, the verification of copper pipes with different outer diameters is met by verifying the position adjustment between the supporting roller and the verifying press roller on the premise that the center position of the equilateral triangle is not changed.

In this example, a mounting groove 400 extending vertically is formed in the mounting base 40, and a plurality of guide rods 401 extending vertically are provided in the mounting groove 400.

The authentication support roller 41 and the authentication press roller 42 are slidably provided on the guide bar 401 by a first carriage h1 and a second carriage h2, respectively.

Specifically, the shaft axes of the validation backup roller 41 and the validation pressure roller 42 are horizontally disposed on the first carriage h1 and the second carriage h 2.

Meanwhile, the first sliding seat h1 is mainly used for adjusting the vertical height of the first sliding seat h1 by relatively locking or loosening a butting bolt with the lower part penetrating into the mounting groove 400, which belongs to the conventional means and is clearly shown in the figure, and the detailed description is omitted and the method can be clearly implemented.

The second slide h2 directly adopts the telescopic link that stretches into from mounting groove 400 top, realizes by the concertina movement of telescopic link that second slide h2 adjusts from top to bottom relative guide bar 401.

In this example, the driving mode of the telescopic rod is pneumatic (i.e. air cylinder), but of course, the driving mode can also be hydraulic or electric.

In summary, the correction implementation process of this embodiment is as follows:

the copper pipe sequentially passes through the first straightening channel and the second straightening channel, and continues to move into the shaping channel in the state of finishing straightening, the upper row of shaping rollers and the lower row of shaping rollers rotate along with the upper row of shaping rollers and the lower row of shaping rollers under the opposite rotation of the upper and lower annular belts, and the copper pipe passing through the shaping channel is shaped, and the shaped copper pipe passes through the verification channel so as to ensure that the center of the copper pipe passing through is coincided with the center of an equilateral triangle formed by the verification channel.

Therefore, the present embodiment has the advantages of:

1. the straightness of the copper pipe can be ensured, and the roundness of the copper pipe can be further improved;

2. under the verification of the verification channel, the correction quality of the copper pipe is ensured so as to meet the requirement of the uniformity of the wall thickness of the bent pipe, the probability of deformation or leakage is reduced, and the service lives of the copper pipe and the compressor are further prolonged;

3. the scrap rate during pipe bending is greatly reduced, the structure is simple, the implementation is convenient, and the cost is low.

The cutting system II is a conventional cutting machine, can be purchased directly, is explained in misalignment, and is also clear and practicable.

As shown in fig. 3, the pipe bending system (c) of the present embodiment includes a pipe bending positioning unit a and a pipe bending power unit B.

Referring to fig. 4, the tube bending positioning unit a is used for positioning the copper tube G and includes a multi-jaw chuck a1, a driving part a2 for driving the multi-jaw chuck a1 to move in a horizontal coordinate system in a lateral direction along X-axis and Y-axis directions, wherein the X-axis direction is a length direction of the copper tube G, and a shaping auxiliary A3.

The driving component A2 adopts a conventional rail and lead screw nut matching mode to realize the transverse movement of the multi-jaw chuck A1 along the directions of an X axis and a Y axis.

Specifically, the shaping auxiliary A3 forms a shaping channel for the copper tube G to pass through, and the shaping channel is located between the multi-jaw chuck a1 and the bending region and is disposed near the bending region.

In this example, the shaping auxiliary A3 includes a first shaping portion a31 and a second shaping portion a32 located on the left and right sides of the copper tube G, wherein the center line of the shaping channel formed between the first shaping portion a31 and the second shaping portion a32 coincides with the center line of the copper tube.

The first styling part a31 includes a plurality of styling rollers 310 in side-by-side and aligned, wherein each styling roller 310 is free to roll around the vertical direction. Here, it should be noted that the plurality of shaping rollers 310 not only serve the purpose of forming the shaping passage, but also facilitate smooth transfer of the copper tube G to the bending region.

The second shaping portion a32 includes a shaping module 320, and an adjusting member 321 for driving the shaping module 320 to move transversely along the Y-axis direction, wherein a shaping groove extending along the X-axis direction is formed on an end surface of the shaping module 320, and a shaping channel is formed between the shaping groove and the plurality of shaping rollers 310.

The adjusting member 321 includes a guide rail a ' extending along the length direction of the Y axis, a sliding seat b ' slidably disposed on the guide rail a ', and a telescopic rod c ' extending along the length direction of the Y axis, wherein the two guide rails a ' are spaced apart from each other, the telescopic rod c ' is disposed between the two guide rails a ', the sliding seats b ' and the guide rails a ' are disposed in a one-to-one correspondence manner, the shaping module 320 is fixedly connected to the sliding seat b ', and the telescopic end of the telescopic rod c ' is connected to the shaping module 320.

The shaping groove is V-shaped, a shaping area in three-point contact with the copper pipe is formed between the V-shaped groove and the corresponding shaping roller 310, a plurality of shaping areas form a shaping channel, and the steel pipe abuts against the two inner side walls of the V from the upper and lower parts on the right side and abuts against the shaping roller from the left end part. And under the three-point contact shaping, the deformation of the copper pipe close to the bending area is reduced during bending.

In this example, the three contacts form an equilateral triangle, and the center line of the equilateral triangle coincides with the center line of the copper tube. Ensures the stability of bending and provides conditions for uniformly bending the copper pipe.

And the pipe bending power unit B is used for applying acting force to the copper pipe to force the deformation and bending of the copper pipe.

In this example, the power unit B for bending the tube includes a first bending part B1 and a second bending part B2 located at the left and right sides of the copper tube and distributed in the bending area in a relatively staggered manner, and a power part B3 driving the first bending part B1 and the second bending part B2 to rotate or reset synchronously around the vertical direction.

The first bending part B1 comprises a first wheel disc B11 with a vertical shaft axis and a first flanging die B12 linearly extending from the tangential direction of the first wheel disc B11, and a first arc-shaped matching groove c1 matched with the outer diameter of the copper pipe is formed in the end face, contacted with the copper pipe, of the first wheel disc B11 and the first flanging die B12.

The second bending part B2 has the same structure as the first bending part B1, and is correspondingly provided with a second wheel disc B21, a second flanging die strip B22 and a second arc-shaped matching groove c 2.

In this example, the second wheel disc b21 is located at the front end of the first wheel disc b11, the first flanging die strip b12 and the second flanging die strip b22 are arranged in parallel, and the first flanging die strip b12 and the second flanging die strip b22 are attached to two opposite sides of the copper tube in a relatively staggered manner from the first arc-shaped matching groove c1 and the second arc-shaped matching groove c2 respectively.

The power unit B3 includes a transmission unit B30 for synchronously connecting the first wheel B11 and the second wheel B21, and a motor B31 for driving the second wheel B21 to rotate.

Referring to fig. 5, the pipe bending process is as follows:

1) the corrected copper pipe penetrates out of the multi-jaw chuck A1 and is cut according to the size, then the multi-jaw chuck A1 drives the copper pipe to move along the X axis and the Y axis, the copper pipe G penetrates out of the first arc-shaped matching groove c1 and the second arc-shaped matching groove c2, and the bent part is aligned with the axis of the first wheel disc b 11;

2) the copper pipe moves from the second shaping part A32 to the first shaping part A31 to form a shaping channel, and the copper pipe is positioned in the shaping channel;

3) the second wheel disc b21 is driven to rotate, the first flanging die strip b12 and the second flanging die strip b22 are bent leftwards along with the rotation of the first wheel disc b11 and the second wheel disc b21 synchronously, wherein the rotation angle of the second wheel disc b21 is 90 degrees, and then the right-angle bending of the copper tube is completed.

Therefore, the bent pipe of the embodiment has the advantages that: on one hand, under the positioning of the shaping channel, the deformation of the straight pipe caused by bending is greatly reduced; on the other hand, under the parallel state of the two flanging die strips, the arc-shaped matching grooves limit the deformation of the copper pipe during bending, so that the roundness of the elbow is improved, and the wall thickness of the elbow is relatively uniform.

The present invention has been described in detail, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the protection scope of the present invention should not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A bending machine for a copper pipe used for an evaporator of an air cooler comprises:

the correcting system comprises a plurality of first correcting rollers which are positioned in the left-right direction of the copper pipe and form a first correcting channel, and a plurality of second correcting rollers which are positioned in the up-down direction of the copper pipe and form a second correcting channel, wherein the copper pipe moves from the first correcting channel to the second correcting channel;

the pipe bending system comprises a pipe bending positioning unit and a pipe bending power unit;

the cutting system is positioned between the correcting system and the pipe bending system and is used for cutting the copper pipe according to the set size,

the method is characterized in that:

the correcting system also comprises a shaping unit and a verifying unit which are positioned at the discharge end part of the copper pipe of the second correcting channel, wherein the shaping unit comprises a frame seat, an upper annular belt and a lower annular belt which are arranged in parallel up and down, and an upper row of shaping rollers and a lower row of shaping rollers which are respectively arranged in the upper annular belt and the lower annular belt, wherein the bottom surfaces of the upper row of shaping rollers are flush and are pressed downwards on the inner ring at the lower part of the upper annular belt; the top surfaces of the lower rows of the shaping rollers are flush and are upwards propped against the inner ring at the upper part of the lower annular belt, and shaping channels matched with the outer diameter of the copper pipe are formed between the upper annular belt and the lower annular belt corresponding to the upper rows of the shaping rollers and the lower rows of the shaping rollers; the verification unit comprises a mounting seat, a verification supporting roller and a verification pressing roller, wherein the verification supporting roller and the verification pressing roller can freely rotate around the axis of the verification unit, a verification channel is formed between the verification supporting roller and the verification pressing roller, the verification channel is aligned with the shaping channel, three contact points are formed between the verification channel and the copper pipe, the three contact points form an equilateral triangle, and the center of the copper pipe and the center of the equilateral triangle are coincided and penetrate through the verification channel;

the bent pipe positioning unit comprises a multi-jaw chuck, a driving part and a shaping auxiliary part, wherein the driving part drives the multi-jaw chuck to move transversely in the horizontal coordinate system along the X-axis direction and the Y-axis direction, the X-axis direction is the length direction of a copper pipe, the shaping auxiliary part forms a shaping channel for the copper pipe to pass through, and the shaping channel is positioned between the multi-jaw chuck and the bending area and is close to the bending area;

the power unit for bending the pipe comprises a first bending part and a second bending part which are positioned on the left side and the right side of the copper pipe and distributed in the bending area in a relatively staggered manner, and a power part for driving the first bending part and the second bending part to synchronously rotate or reset around the vertical direction, wherein the first bending part comprises a first wheel disc and a first flanging die strip, the first wheel disc is vertically arranged on an axis line, the first flanging die strip linearly extends from the tangential direction of the first wheel disc, and a first arc-shaped matching groove matched with the outer diameter of the copper pipe is formed in the end surface of the first wheel disc, the first flanging die strip and the copper pipe, which are in contact with each other; the second bending part is the same as the first bending part in structure, a second wheel disc, a second flanging die strip and a second arc-shaped matching groove are correspondingly formed, the first flanging die strip and the second flanging die strip are arranged in parallel, and the first flanging die strip and the second flanging die strip are respectively attached to the two opposite sides of the copper pipe in a manner that the first arc-shaped matching groove and the second arc-shaped matching groove are staggered relatively.

2. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 1, characterized in that: the verifying support roller is inwards recessed from the surface of the roller to form a V-shaped roller groove, the copper pipe is contacted with two opposite sides of the V-shaped roller groove from the lower part, the upper part of the copper pipe is abutted against the bottom surface of the verifying press roller, and the verifying support roller and/or the verifying press roller are movably adjusted up and down along the vertical direction and are arranged on the mounting seat.

3. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 1, characterized in that: the bottom surfaces of the upper row of shaping rollers are flush with the bottom surface of the belt wheel of the upper annular belt; the top surface of the lower row of the shaping rollers is flush with the top surface of the belt wheel of the lower annular belt.

4. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 3, wherein: inner teeth are distributed on the inner rings of the upper annular belt and the lower annular belt, and the shaping roller and the belt wheel are gears matched with the inner teeth.

5. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 1, characterized in that:

the upper row of shaping rollers and the lower row of shaping rollers are symmetrically arranged up and down, and each shaping roller forming the upper row of shaping rollers and each shaping roller forming the lower row of shaping rollers can be rotationally arranged around the axis direction of the shaping roller; the upper annular belt and the lower annular belt are arranged in an up-down symmetrical mode, an upper annular ring groove and a lower annular ring groove which are arranged in an up-down aligned mode are formed in outer rings of the upper annular belt and the lower annular belt respectively, and the upper annular ring groove and the lower annular ring groove are located between the lower portion of the upper annular belt and the upper portion of the lower annular belt to form the shaping channel.

6. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 1, characterized in that: the upper row of shaping rollers and the lower row of shaping rollers move oppositely and are arranged on the frame seat respectively through the adjusting parts by taking the central line of the shaping channel as a reference.

7. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 1, characterized in that: the shaping auxiliary part comprises a first shaping part and a second shaping part which are positioned on the left side and the right side of the copper pipe, wherein a central line of the shaping channel formed between the first shaping part and the second shaping part is superposed with a central line of the copper pipe.

8. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 7, wherein: the first sizing section comprises a plurality of sizing rollers aligned side by side, wherein each sizing roller freely rolls around a vertical direction;

the second design portion is including the design module, be used for the drive the design module is along the adjusting part of Y axle direction lateral shifting motion, wherein the terminal surface of design module is formed with the design groove that extends along the X axle direction, design groove and a plurality of form between the design gyro wheel the design passageway.

9. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 8, wherein: the design section is the V type, and between the design gyro wheel that V type and correspond constitute one with the design district of copper pipe three point contact, a plurality of the design district constitutes the design passageway, wherein the steel pipe contradicts on two inside walls of V, contradicts on the design gyro wheel from the left end portion from the last lower part on right side, and three contact point forms equilateral triangle, and equilateral triangle's central line and the coincidence of the central line of copper pipe.

10. A tube bender for a copper tube used for an evaporator of an air cooler according to claim 1, characterized in that: the second wheel disc is positioned at the front end of the first wheel disc, and the first flanging die strip and the second flanging die strip are synchronously bent leftwards along with the rotation of the first wheel disc and the second wheel disc;

the angle of synchronous rotation of the first wheel disc and the second wheel disc is equal to the bending angle of the copper pipe;

the power part comprises a transmission part and a motor, wherein the transmission part is used for synchronously connecting the first wheel disc and the second wheel disc, and the motor is used for driving the first wheel disc or the second wheel disc to rotate.