CN207238825U - A kind of simple pendulum arm or so is total to curved CNC tube bending machine - Google Patents

Abstract

It the utility model is related to a kind of simple pendulum arm or so and be total to curved CNC tube bending machine, belong to tubular object extruding processing technology field.Wherein, CNC tube bending machine includes rack, control unit and feeding trolley, head, guided mode unit and the switch unit controlled in rack and by control unit；Head includes clamping, and circle mould, the swing arm of drive shaft is total to round mould, and driving circle mould and swing arm carry out the bend pipe driver that both bend pipe rotation and driving switch rotation between left bend pipe position and right bend pipe position；Switch unit is driven head to be moved up with respect to rack perpendicular to the transverse direction for treating elbow member axial direction with perpendicular by control unit control, to drive head to switch between left bend pipe position and right bend pipe position.It can not only be based on simple pendulum arm and realize that left and right is curved altogether, and bending quality can be effectively improved, can be widely applied in the fields such as air-conditioning, aviation.

Description

A kind of simple pendulum arm or so is total to curved CNC tube bending machine

Technical field

Tubular object extruding equipment is the utility model is related to, specifically, is related to a kind of simple pendulum arm or so and is total to curved numerical controlled bending of pipe Machine.

Background technology

CNC tube bending machine is widely used in the industrial circles such as air-conditioning, automobile, ship, aerospace, mainly including rack, control Unit processed and feeding trolley, guided mode unit and the head controlled in rack by control unit；Head includes being used to control The circle mould of elbow radius, swing arm, is used to together with circle mould clamp the clamping of pipe fitting, and driving circle mould and swing arm in swing arm Rotated around the rotation axis of drive shaft to carry out the bend pipe motor of bend pipe action to pipe fitting.By the difference of wrap direction, it is divided into Left curved bending machine, right curved bending machine and left and right are total to curved bending machine, and left and right is total to curved bending machine and is usually used in complex pipeline Bending operation.

Publication No. is to disclose one kind in the patent document of CN101817038A to be used to build left and right curved numerical controlled bending of pipe altogether The bending mechanism of machine, including bearing, the swiveling gear being installed in rotation on bearing, for driving the motor of swiveling gear, The rotary support being slidably mounted on swiveling gear, the left centration axis being slidably mounted in by sliding block on rotary support With right centration axis, left centration axis, the left axis pin in right centration axis, right axis pin are selectively stretched into, and it is correspondingly connected fixed on a left side Left bending die, right bending die in mandrel, right centration axis；Swivel chute is equipped with the side of rotary support, it is solid on swiveling gear Equipped with the driving lever stretched into swivel chute；During the work time, by being selectively connectable with doing centration axis and left axis pin or right fixed Mandrel and right axis pin and realize the switching of rotating shaft, to reach using one in left bending die, right bending die to justify mould, and another one To justify mould, so as to be switched between left curved operating mode and right curved operating mode.Though it can realize that left and right is curved altogether, in order to Swiveling gear is enough avoided to cause to interfere to bend pipe process, it is desirable to which two centration axis in height will be away from swiveling gear, while nothing Method configures swing arm and the clamp die mechanism in swing arm, is easy to cause the unstable of whole swan neck system and influences bending quality.

Utility model content

The purpose of this utility model is to provide a kind of simple pendulum arm or so and is total to curved CNC tube bending machine, can not only be based on simple pendulum arm Realize that left and right is curved altogether with Dan Yuanmo, and bending quality can be improved.

To achieve these goals, simple pendulum arm provided by the utility model or so be total to curved CNC tube bending machine include rack, Control unit and in rack and by control unit control swan neck system and feeding trolley, swan neck system include head, Guided mode unit and switch unit；Head includes left curved round mould and the right curved round mould being installed on overlapped way in drive shaft, with Circle mould is total to the swing arm of drive shaft, the clamping in swing arm, and is sequentially connected with drive shaft to drive round mould and swing arm Carry out the bend pipe driver that both bend pipe rotation and driving switch rotation between left bend pipe position and right bend pipe position；Switch unit Driven head to be moved up with respect to rack perpendicular to the transverse direction for treating elbow member axial direction with perpendicular by control unit control, drive machine Head switches between left bend pipe position and right bend pipe position.

In the CNC tube bending machine, by being arranged to the circle mould on head by circle die cavity towards opposite left curved round mould and Right curved round mould is installed in drive shaft with stacked system, at the same by swing arm and circle mould be arranged to be driven by bend pipe driver and around The rotation axis of drive shaft is rotated with the reciprocating rotation between left bend pipe position and right bend pipe position, and is aided with switch unit driving Head switches between left bend pipe position and right bend pipe position and moves perpendicular to the transverse direction for treating elbow member axial direction and perpendicular move up It is dynamic, to realize switching of the whole bending machine between the bend pipe pattern of left and right two, i.e., it is curved altogether left and right to can be achieved with based on simple pendulum arm, and Only head is moved in the handoff procedure of bend pipe pattern and keeps pipe fitting motionless in the horizontal, and it is partially long and firm to can effectively avoid length Spend relatively low pipe fitting and undesirable rock occur because of switching bend pipe direction, it is ensured that bending quality；Meanwhile it can be in drive shaft The upper left curved round mould for arranging more than one layer and right curved round mould, to meet more working condition requirements and improve forming elbow efficiency.

Specific scheme includes cloth-guiding base, driving mechanism and the right curved guided mode being installed on the right side of cloth-guiding base for guided mode unit With the left curved guided mode on left side；Driving mechanism is driven cloth-guiding base to laterally move with left bend pipe position by control unit control Switch and move back and forth vertically to aid in bend pipe to act between right bend pipe position；Switch unit is driven by control unit control Guided mode unit is synchronized with the movement with head.

The configuration of cloth-guiding base is total to based on above-mentioned left and right guided mode, two guided modes is shared a set of guided mode driving mechanism, effectively Reduce amount of parts；Meanwhile when carrying out the operation of right bend pipe, whole cloth-guiding base and two guided modes are respectively positioned on the left side of round mould, And when carrying out the operation of left bend pipe, cloth-guiding base and two guided modes are respectively positioned on the right side of round mould, effectively avoid being total in left and right in curved pattern, The interference effect that guided mode operates bend pipe.

More specifically scheme includes rack-mounted mounting base for switch unit, can vertically be slided by line slideway The vertical slide plate being installed on dynamicly in mounting base, the transverse direction that can be transversely slidably mounted on by line slideway on vertical slide plate Slide plate, head are installed on cross slide；Driving mechanism includes transversely being slidably mounted on horizontal cunning by line slideway Support base on plate, cloth-guiding base are installed on support base in which can slide axially by line slideway.Based on above-mentioned plank frame The switch unit of structure, can effectively improve integrally-built compactedness.

More specifically scheme is that circle die cavity includes curved bend pipeline section and straight line gripping section for another, the straight line on left curved round mould Gripping section is opposite with the direction of the straight line gripping section of right curved round mould；Left angle coupling mould is with right angle coupling mould in the axis perpendicular to drive shaft Non-overlapping face region is projected in the plane of line；Circle mould and matched clamping, guided mode form adaptation module, adjacent layer arrangement Two projection non-overlapping face regions of the adaptation modules on the plane parallel to the axis.Effectively improve clamping and circle mould Between to the firm grip degree of pipe fitting, simultaneously effective improve being connected for guided mode and clamping.

Preferable scheme is equipped with clamping driving mechanism between clamping and swing arm, and clamping driving mechanism includes clamping seat, reinforcement Rocking bar, reinforcement connecting rod, boosting lever and actuator, clamping seat can arcuately guide rail be slidably mounted in swing arm, actuator Stator is hinged in swing arm；The fixing end of reinforcement rocking bar is hinged with swing arm, and the mover of swinging end and actuator is hinged；Boosting lever Fulcrum be hinged in swing arm, force side is hinged with clamping seat；One end of reinforcement connecting rod and the swinging end of reinforcement rocking bar are hinged, separately One end and the force side of boosting lever are hinged；Arc-shaped guide rail and the swinging track iso-curvature radius of force side, the branch of boosting lever Point is positioned at the swinging track adjacent to the downside of drive shaft.

Clamping driving mechanism based on said structure, the power output of its actuator, through reinforcement rocking bar and reinforcement connecting rod level-one After amplification, then through boosting lever progress two level amplification, and it is applied to by clamping seat in clamping, effectively ensures that clamping and circle Mould is to the clamping force of pipe fitting and the stability of clamping.Meanwhile when clamping opens release plumbing component with circle mould, clamping seat can be along arc Shape guide rail and pull clamping down to move back and avoided to pipe fitting, be effectively prevented to pipe fitting subsequent action produce interference effect.

Preferred scheme is equipped with the side directing plate for being folded in clamping seat both sides for swing arm, and arc-shaped guide rail is arranged on side Arc chute on the directing plate of face, is respectively provided with and the matched sliding block of arc chute on clamping seat both sides.

Based on said structure, the movement locus of clamping seat is limited by the side directing plate and arc guide barrel of both sides Position, effectively ensures that the stability of clamping seat movement, i.e. clamping is clamping and the stability during release plumbing component.

Another preferable scheme is bend pipe motor for bend pipe driver, is passed between drive shaft and bend pipe motor by gear Dynamic device is sequentially connected, and gear drive includes input gear, transition gear, output gear and gap adjusting mechanism；Input gear, Transition gear and output gear are helical gear；Gap adjusting mechanism includes being used for adjusting the of sideshake between transition gear and output gear One gap adjusting mechanism, and for adjusting the second gap adjusting mechanism of sideshake between input gear and transition gear；First gap adjusting mechanism includes Eccentric shaft and for adjusting the corner of eccentric shaft and can be revolved into line-locked adjusting and locking mechanism, transition gear to its angle position It is sleeved on eccentric shaft with turning.

Based on above-mentioned transmission mechanism, by the way that transition gear is sleeved on eccentric shaft, with the corner by adjusting eccentric shaft And the sideshake between transition gear and output gear is adjusted, the collimation after effectively ensuring that transition gear shaft before adjustment, i.e., It ensure that the transmission stability adjusted before and after gap；And by two gear centres away from minor adjustment zoom into tune to angle of eccentricity It is whole, effectively improve the precision of sideshake adjustment between gear；Then by the second gap adjusting mechanism, complete to input gear and transition tooth The adjustment of sideshake between wheel；To solve the problems, such as the bad adjustment of transition gear sideshake of tertiary gear group in the prior art, to meet Bending machine is improved with the production of the bending machine of gear drive structure to compared with large span transmitting the requirement of heavier load The stability of the product accuracy of manufacture.

The fixation porose disc that preferred scheme includes being fixedly connected with the mounting base of head for adjusting and locking mechanism, with bias One axial end of axis rotates synchronously the gear backlash adjustment porose disc of connection, and selectively passes through a pair of of lock on two porose discs Determine the stop pin in hole.

Adjusting and locking mechanism based on said structure, is rotated by rotation eccentric axis to drive gear backlash to adjust porose disc, And the different corners to eccentric shaft are obtained by the pairing to lock hole pair on diverse location, and realized and aligned by stop pin Locking is put, whole mechanism structure is simple, compact；The interference to pipe fitting during bend pipe can further be reduced.

Another preferred scheme includes being used for the mounting base for installing input gear for the second gap adjusting mechanism, and is installed in It is used for the adjustment mechanism for promoting mounting base so that the direction of input gear towards close transition gear is moved in the mounting base of head.Have Effect ground simplifies the structure of the second gap adjusting mechanism, to reduce the interference to bend pipe process.

Another preferable scheme is opposite with the circle die cavity direction of right curved round mould for left curved round mould.Effectively simplify clamping machine Control when structure and left and right bend pipe position switch.

Brief description of the drawings

Fig. 1 is the stereogram of the utility model embodiment 1；

Fig. 2 is the A partial enlarged views of Fig. 1；

Fig. 3 is feeding trolley and the stereogram of rack in the utility model embodiment 1；

Fig. 4 is the stereogram of switch unit in the utility model embodiment 1；

Fig. 5 is that transversal driving mechanism and the guided mode list after cross slide way slide block mechanism are omitted in the utility model embodiment 1 The stereogram of member；

Fig. 6 is in structure chart during left bend pipe position for head in the utility model embodiment 1 with guided mode unit；

Fig. 7 is transversal driving mechanism in bend pipe motor, gear drive and guided mode unit in the utility model embodiment 1 With the structure chart of cross slide way slide block mechanism；

Fig. 8 is the stereogram of circle mould, swing arm and clamping component in the utility model embodiment 1；

Fig. 9 is clamping component and the structure chart of swing arm in the utility model embodiment 1；

Figure 10 is the process schematic that clamping switches to clamp position from release conditions in the utility model embodiment 1；Its In, Figure 10（a）Structure chart during in release conditions, Figure 10（b）For it is in an interim state when structure chart, Figure 10（c）For Structure chart during in clamp position；

Figure 11 is the structure diagram of 1 middle gear transmission device of the utility model embodiment and bend pipe motor；

Figure 12 is the B partial enlarged views in Figure 11；

Figure 13 is the structure decomposition figure of eccentric shaft and adjusting and locking mechanism in the utility model embodiment 1；

Figure 14 is the structure diagram that 1 middle gear sideshake of the utility model embodiment adjusts porose disc；

Figure 15 is that the position that 1 middle gear sideshake of the utility model embodiment adjustment porose disc determines hole pair with fixed porose disc locking is closed It is schematic diagram；

Figure 16 is in structure chart during right bend pipe position for head in the utility model embodiment 1 with guided mode unit；

Figure 17 is the structure decomposition figure of lock-screw, check pin and eccentric shaft in the utility model embodiment 2；

Figure 18 is lock-screw, the schematic view of the mounting position of check pin in the utility model embodiment 2；

Figure 19 is the structure diagram that 3 middle gear sideshake of the utility model embodiment adjusts porose disc；

Figure 20 is the structure diagram that porose disc is fixed in the utility model embodiment 3；

Figure 21 is lever in the utility model embodiment 5, clamping seat and the structure diagram for guiding swing rod.

Embodiment

With reference to embodiments and its attached drawing the utility model is described in further detail.

Embodiment 1

Referring to Fig. 1 and Fig. 2, this CNC tube bending machine 1 includes rack 11, control unit and being controlled by this in rack 11 The swan neck system and feeding trolley 2 of unit control processed；Wherein, swan neck system includes switch unit 3, guided mode unit 4 and head 5.

In the present embodiment, control unit includes processor, memory and touch-screen 12, and processor is connect by touch-screen 12 Receive operating personnel input instruction, while by perform be stored in memory correspond to computer program control swan neck system and Feeding trolley 2 acts and performs the operation such as bend pipe, switching.

Referring to Fig. 3, feeding trolley 2 includes the feeding guide 21 being fixed in rack 11, is slideably pacified by sliding block 210 Feeding slipway 22 on feeding guide 21, the feeding being fixed on along the direction arrangement parallel to feeding guide 21 in rack 11 Rack 23, the feeding main shaft 24 that can be installed on around own axis on feeding slipway 22, installed in 24 front end of feeding main shaft And the three-clove style clamping jaw 240 driven by clamping jaw cylinder 27, for the rotating servo motor 25 for driving feeding main shaft 24 to rotate, pass through The feeding that gear on armature spindle coordinates with feeding rack 23 and drives feeding slipway 22 to be moved back and forth along feeding guide 21 Servomotor 26, and it is installed in the travel switch 28,29 being controlled in rack 11 to the stroke of feeding slipway 22.

Following in the description of other unit concrete structures, treating that elbow member is pipe fitting of the clamping in feeding main shaft 24, In the present embodiment, since feeding main shaft is arranged in the horizontal direction, the axial direction for making to treat elbow member is arranges in the horizontal direction, vertically In pipe fitting axial direction transverse direction with vertically be respectively horizontal direction with vertical, i.e., transverse direction with vertically it is perpendicular.

Referring to Fig. 4, switch unit 3 includes installing plate 30, vertical driving mechanism, vertical lines guide rail 311, vertical sliding block 312nd, vertical slide plate 32, transversal driving mechanism, horizontal line slideway 331, transverse slider 332, cross slide 34, lateral position inspection Survey mechanism and vertical position testing agency.

Vertical slide plate 32 vertically can be installed slidably by the cooperation of vertical lines guide rail 311 and vertical sliding block 312 On installing plate 30.Vertical driving mechanism includes servomotor 351, is sequentially connected by synchronous belt 352 and servomotor 351 Screw 353, and the feed screw nut engaged with screw 353；Screw 353 is installed in rotation on installing plate 30 and vertically cloth Put, feed screw nut is fixed on vertical slide plate 32, so as to drive vertical 32 phase of slide plate by the positive and negative rotation of servomotor 351 Installing plate 30 is vertically moved back and forth.

Cross slide 34 transversely can be installed slidably by the cooperation of horizontal line slideway 331 and transverse slider 332 On vertical slide plate 32；Transversal driving mechanism includes servomotor 361, is sequentially connected by synchronous belt 362 and servomotor 361 Screw 363, and the feed screw nut 364 engaged with screw 363；Screw 363 is installed in rotation on vertical slide plate 32 and edge Lateral arrangement, feed screw nut 364 are fixed on cross slide 34, so as to drive horizontal stroke by the positive and negative rotation of servomotor 361 Transversely moved back and forth to the relatively vertical slide plate 32 of slide plate 34.I.e. under the promotion of two driving mechanisms, cross slide 34 is opposite Installing plate 30 can make two-dimensional space movement in the vertical plane for treating elbow member axial direction.

Lateral position testing agency includes the first position travel switch being installed on by installing plate 301 on vertical slide plate 32 302 pass through travel switch with second place travel switch 303, and the travel switch trigger member 304 being installed on cross slide 34 Touch and trigger between trigger member 304 and two travel switches, with to the relative position between cross slide 34 and vertical slide plate 32 It is monitored；Vertical position testing agency structure and lateral position testing agency are similar, that is, are also to pass through two position strokes Switch is monitored the relative position between vertical slide plate 32 and installing plate 30.

Referring to Fig. 5 to Fig. 7, guided mode unit 4 includes cloth-guiding base 41, driving mechanism and is installed on the right side of cloth-guiding base 41 The curved guided mode 42 in two pieces of right sides and the curved guided mode 43 in one piece of left side on left side.Driving mechanism includes cross slide way slide block mechanism, laterally driven Mechanism, support base 46, axial oil cylinder 47 and axial guidance slide block mechanism 48.

Cross slide way slide block mechanism by mounting base 50 and the line slideway 44 that is arranged along the horizontal with can be straight along this The sliding block 45 that line guide rail 44 slides is formed；Transversal driving mechanism includes servomotor 491, passes through synchronous belt 492 and servomotor 491 screws 493 being sequentially connected and the feed screw nut being fixedly connected in sliding block 45 are formed, so that by servomotor 491 just Invert and drive sliding block 45 transversely to be moved back and forth with respect to mounting base 50, so that being forced through mounting base 451 is fixed on sliding block 45 On support base 46, cloth-guiding base 41, axial oil cylinder 47, left curved guided mode 43 and right curved guided mode transversely slide.

Cloth-guiding base 41 is a door type frame structure, and axial guidance slide block mechanism 48 includes being installed in door type frame structure Two madial walls on and axially disposed line slideway 481 and the sliding block 482 that is installed on support base 46；Axial oil cylinder 67 Cylinder body is fixedly connected with support base 46, and cylinder rod 471 is fixedly connected with door type frame, so as to promote cloth-guiding base 41 is opposite to support Seat 46 moves back and forth vertically.

Referring to Fig. 6 to Fig. 8, head 5 includes mounting base 50, swing arm 51, circle mould 52, clamping 53, clamping driving mechanism 6, curved The gear drive 7 being sequentially connected between pipe motor 55, drive shaft 54 and composition bend pipe motor 55 and drive shaft 54. In the present embodiment, three layers of round mould, including right curved round mould 521, left curved round mould are installed in drive shaft 54 in a manner of lamination 522 and the different right curved round mould 523 of elbow radius, left curved round mould 522 can be identical with the elbow radius of the curved round mould in two right sides Difference, depending on actual condition, when circle mould elbow radius changes, the extension elongation of corresponding clamping and guided mode also can be with change With matching circle mould；The quantity of left curved round mould and right curved round mould is configured according to actual needs；Right curved round mould 521 and right curved round mould 523 circle die cavity is towards identical, and with the circle die cavity of left curved round mould 522 towards on the contrary, in the present embodiment, the circle of three round moulds Die cavity is U-shaped structure, i.e., its justify die cavity include be used for control pipe fitting elbow radius curved bend pipeline section and by with clamping phase The straight line gripping section for coordinating and being clamped to pipe fitting end, exemplified by justifying mould 522, it, which justifies die cavity, includes semicircle bend loss 5221 with 5222 sections of straight line gripping section.The utility model of definition in to(for) circle die cavity direction is to be pressed from both sides with curved bend pipeline section and straight line It is starting point to hold intersegmental tie point, and along the direction of straight line gripping section extension；When circle die cavity is U-shaped round die cavity, circle mould The direction of chamber may be defined as the opening direction of U-shaped structure；And for the circle die cavity of other structures, the circle die cavity in the utility model Towards the opening direction for referring to justify die cavity with semicircular part bend pipe of the circle mould clip position as starting point using clamping.Clamping 53 Three are arranged in correspondence with, respectively right angle coupling mould 531, left angle coupling mould 532 and right angle coupling mould 533, its position distribution and circle mould Chamber cathetus gripping section is corresponding, therefore, in the present embodiment, to avoid clamping position from causing to interfere to guided mode clip position, There are left angle coupling mould and the non-overlapping face region of projection of the right angle coupling mould in the plane perpendicular to 54 axis of drive shaft, with left curved Illustrated exemplified by position relationship between clamping 532 and right angle coupling mould 533, wherein the axis of drive shaft 54 vertically cloth Put, then perpendicular plane is horizontal plane, then projection of the left angle coupling mould 532 with right angle coupling mould 533 in the horizontal plane is non-overlapping Face region, at this time, if left curved round mould 522 is identical with the elbow radius of right curved round mould 523, the overlapping region of the two causes to be mostly one Straight line, that is, justify the projection of the connecting line of curved bend pipeline section and straight line gripping section in the horizontal plane in die cavity.

As shown in Fig. 6, Fig. 8 and Figure 16, when swing arm 51 is in left bend pipe position as shown in Figure 6, left curved round mould 522 Straight line gripping section is outwardly disposed；Similarly, when swing arm 51 is in right bend pipe position as shown in figure 16, right curved round mould 521, 523 straight line gripping section is also outwardly disposed, i.e., left curved round mould is opposite with the direction of the straight line gripping section of right curved round mould.

With any round mould and the clamping being adapted with the circle mould, guided mode formed one group be adapted to module from the point of view of, i.e., along parallel to The direction of the axis of drive shaft 54 sees that the circle mould, clamping with layer arrangement form one group with guided mode and be adapted to module, for example, left curved Circle mould 522, left angle coupling mould 532 and left curved guided mode 43 form an adaptation module；In the present embodiment, left curved guided mode, right curved guided mode, Left angle coupling mould and right angle coupling mould are layering installation, their height on vertical are highly consistent with corresponding mould of justifying, i.e., same The distribution of group adaptation module is within the same layer.Two groups of adaptation modules of adjacent layer arrangement are in the flat of the axis parallel to drive shaft 54 The non-overlapping face region of projection on face, so as to can only have a set of clamping, circle mould and guided mode in same layer, i.e., left curved round mould, a left side are curved Clamping, left curved guided mode and right curved round mould, right angle coupling mould, right curved guided mode cannot be installed on same layer at the same time.

By mounting base 50 being installed together with guided mode unit 4 head 5 to cross slide 34 as shown in Figure 4, with Under the driving of switch unit 3 two dimensional motion is being done in the vertical plane for treating elbow member axial direction.

Referring to Fig. 6, Fig. 8 and Fig. 9, clamping driving mechanism 6 includes clamping seat 60, reinforcement rocking bar 621, reinforcement connecting rod 622, increasing Power lever 623 and actuator 63, the clamping 53 of three different elbow radius are installed on the installation of clamping seat 60 in a manner of stacking On face 600, away from the clamping adjusting screw 64 being rotatably mounted on the one end for justifying mould in swing arm 51.

Actuator 63 is oil cylinder, its cylinder rod 631 forms the mover of actuator 63, and cylinder body 632 forms determining for actuator 63 Son, and cylinder body 632 is hinged in swing arm 51 by hinge shaft 633.

The fixing end of reinforcement rocking bar 621 is hinged by hinge shaft 651 with swing arm 51, and the end of swinging end and cylinder rod 631 leads to It is hinged to cross hinge shaft 652；The fulcrum of boosting lever 623 is hinged in swing arm 51 by hinge shaft 653, and force side passes through with clamping seat 60 Hinge shaft 654 is hinged；One end of reinforcement connecting rod 622 is hinged by hinge shaft 652 with 621 swinging end of reinforcement rocking bar, i.e., cylinder rod 631, The end of reinforcement connecting rod 622 and reinforcement rocking bar 621 is total to hinge shaft and is hinged, and the force side of the other end and boosting lever 623 passes through hinge shaft 655 is hinged.

Referring to Fig. 8 to Figure 10, swing arm 51 includes being clamped in the side directing plate 627 of 60 both sides of clamping seat, draws in two sides 627 medial surface of guide plate is respectively provided with and 629 matched cunning of arc chute formed with arc chute 629 on 60 both sides of clamping seat Block 628, so as to carry out lateral Displacement guiding and the displacement in vertical plane to the moving process of 60 opposed swing arms 51 of clamping seat Carry out spacing guiding；And arc chute 629 is located at the lower section of the swinging track of 623 force side of boosting lever on vertical position, So as to the tie point layout designs to clamping seat 60.Such as Figure 10（a）It is shown, when clamping, which is in, opens release plumbing component state, oil Cylinder rod, reinforcement rocking bar 621 and the reinforcement connecting rod 622 of cylinder 63 form Y-shaped structure, and lever 623 is with reinforcement connecting rod 622 close to altogether Line but bias a small angle towards the direction for deviateing sliding block 628, i.e., both towards the angle of arc chute 629 be less than 180 degree.At this time, Cylindrical rod type sliding block 628 is resisted against the lower groove end face of arc chute 629.

Such as Figure 10（b）Shown, with the work of oil cylinder 63 and ejection cylinder bar, it promotes reinforcement rocking bar 621 and reinforcement connecting rod 622 towards the direction movement collinearly arranged, so as to promote the force side of boosting lever 623 to be moved towards the direction for deviateing arc chute 629 It is dynamic, to promote clamping seat 60 to be moved towards close to the direction of circle mould by force side.

Such as Figure 10（c）It is shown, with further pushing away for oil cylinder 63, until sliding block 628 arcuately sliding slot 629 slide into against Groove end face thereon, i.e. clamping are clamping pipe fitting state, and at this time, boosting lever 623 is vertically arranged, reinforcement rocking bar 621 and reinforcement Connecting rod 622 collinearly arranges, i.e., the two power output to oil cylinder 63 carries out approach infinity multiple amplification, so as to be clamping clamping pipe Chucking power needed for part offer.

In above-mentioned clamping process, arcuately sliding slot 629 slides sliding block 628, i.e., arc chute 629 forms 60 phase of clamping seat The arc-shaped guide rail moved to swing arm 51, in the present embodiment, the center line of arc chute 629 is with the axis of hinge shaft 654 around hinge shaft 653 Swinging track iso-curvature radius, i.e. arc-shaped guide rail and boosting lever 623 force side swinging track iso-curvature radius so that really Protect clamping seat 60 and translation feature is remained in moving process.

Referring to Figure 11 to Figure 13, mounting base 50 is the cavity body structure with installation chamber 100, and loading drive gear is set to three-level Gear drive, including input gear 741, transition gear 757 and output gear 775, the first gap adjusting mechanism and second adjust gap Mechanism；First gap adjusting mechanism includes eccentric shaft 76 and adjusting and locking mechanism；Three gears are helical teeth cylinder wheel.

Bend pipe motor 55 is fixed on installing plate 73 by four fixing bolts, and input gear 741 is set with by flat key On the output shaft of bend pipe motor 55, installing plate 73 is equipped with eight waist round hole and two keyways, and the major axis of waist round hole is parallel In the flute length direction of keyway, the openend of keyway is arranged on the side end face of installing plate 73；The bottom surface of 50 bottom plate 512 of mounting base with Matched two keyways are equipped with the corresponding position of keyway, installing plate 73 passes through the fixation through several through waist round hole Bolt and on the bottom plate 512, and by the two upper corresponding keyway of flat key connection, at this time, input gear 741 by arranged on Through hole 510 on bottom plate 512 stretches into and in installation chamber 100, i.e., installing plate 73 forms the mounting base of input gear.

Second gap adjusting mechanism includes installing plate 73, the fixed block 745 being fixed on bottom plate 512 and the major axis side along waist round hole To arrangement ground adjusting screw 746, fixed block 745 is equipped with and 746 matched screw hole of adjusting screw, after completion of installation, tune The screw rod end face of whole screw 746 is by against on the side end face of installing plate 73, to promote safety loading board 73 by turning screw 746 The direction limited along key with keyway is moved, i.e., is moved along the long axis direction of waist round hole.

Eccentric shaft 76 includes installation axle portion 761, standard shaft portion 762 and installation axle portion 763, installs the axis of axle portion 761,763 Collinearly；The end face of installation axle portion 761 is equipped with Hexagon hole 7610, in order to turn whole eccentric shaft 76 by allen wrench Axis around installation axle portion rotates, that is, forms an interior hexagonal adjusting hole；The axis in standard shaft portion 762 is put down with installing the axis of axle portion Go but not conllinear, transition gear 757 is rotatably mounted around standard shaft portion by two bearings 756,758 on axial end On 762.

Adjusting and locking mechanism includes Hexagon hole 7610, fixed porose disc 753 and gear backlash adjustment porose disc 752, mounting hole Disk 753 is sleeved on circular bosses type ring body structurc in installation axle portion 763, and the path end face of the circular bosses type ring body structurc for one It is resisted against on the shaft shoulder 7630 in installation axle portion 763, is equipped with bottom plate 512 and is engaged with the circular bosses type ring body structurc Ladder hole；Eccentric shaft 76 is stretched into installation chamber 100 after passing through ladder hole, so that transition gear 757 can be around bias Axis 76 is rotatably mounted in installation chamber 100；Installation axle portion 761 stretches into axis hole 7140 on top plate 514 and therewith It is rotatably assorted；Excessively fixed porose disc 753 is fixed in ladder hole by fixing screws 755.

Gear backlash adjustment porose disc 752 can be sleeved in installation axle portion 763 with rotating synchronously with eccentric shaft 76, in this reality Apply in example is by adjusting the flat round hole 7520 on porose disc 752 and the oblate axis in installation axle portion 763 arranged on gear backlash Portion 7631 coordinates and realizes synchronous rotation, and gear backlash is adjusted porose disc 752 and excessively fixed porose disc by stop pin 7502 753 are fixedly connected, and are coordinated by round nut 751 and the external screw thread in installation axle portion 763 by gear backlash adjusting hole Disk 752 is pressed on fixed porose disc 753, so as to fulfill the locking of the angle position to eccentric shaft 76.

Output gear 775 to rotate synchronously is sleeved in drive shaft 54 by two flat keys, 54 both ends of drive shaft It is rotatably installed in by bearing 773 and bearing 777 in mounting base 50, and output gear 775 also is located at installation chamber 100 It is interior.

After in the course of work for completing installation, transition gear 757 is nibbled with output gear 775, input gear 741 at the same time Close.

Referring to Figure 13 to Figure 15, six groups of lock holes 80 are equipped with gear backlash adjustment porose disc 752, are sequentially the clockwise One hole group, 81 to the 6th hole group 86, the first hole group 81 has the lock hole 80 that three interval central angles are 15 degree, i.e., same In the group of hole, the interval central angle between two neighboring lock hole is equal, and the interval central angle between the 6th hole group 86 is 20 degree；The Two hole groups 82 have the lock hole 80 that four interval central angles are 15 degree, and the interval central angle between the first hole group 81 is 18 Degree；3rd hole group 83 has the lock hole 80 that four interval central angles are 15 degree, and the interval central angle between the second hole group 82 For 20 degree；4th hole group 84 has the lock hole 80 that three interval central angles are 15 degree, and the interval circle between the 3rd hole group 83 Heart angle is 22 degree；It is 15 degree of lock hole 80 that 5th hole group 85, which has four interval central angles, and between the 4th hole group 84 between Every central angle be 20 degree；6th hole group 86 has the lock hole 50 that four interval central angles are 15 degree, and between the 5th hole group 85 Interval central angle be 20 degree；The center of circle of these lock holes 80 is located on the circle that the 752 concyclic heart of porose disc is adjusted with gear backlash.

And fix porose disc 753 and be equipped with six lock holes 830 circumferentially equably arranged along it, lock hole 830 is and lock Circle where the center of circle of 7502 matched pin hole of rationed marketing, i.e. six lock holes 830 and the 753 concyclic heart of fixed porose disc, and it is adjacent Interval central angle between two lock holes is 60 degree.

If the interval central angle 810 of the lock hole 830 of neighbouring first hole group 81 is 2.5 degree, sequentially sort clockwise, the Interval central angle 820 between two 830 and second hole groups 82 of lock hole is 15 degree, the 3rd 830 and the 3rd hole group 83 of lock hole Between interval central angle 840 be 10 degree, the interval central angle 850 between the 4th 830 and the 4th hole group 84 of lock hole is 5 degree, the Interval central angle 860 between five 830 and the 5th hole groups 85 of lock hole is 12.5 degree, the 6th 830 and the 6th hole group of lock hole Interval central angle 870 between 86 is 7.5 degree, there it can be seen that turning every turn of the corner of eccentric shaft 76 by allen wrench 2.5 degree are crossed, a pair of locking hole 80 is there is and is aligned with lock hole 830, so as to by locking spiral pin 7502 by the phase between the two Position is locked, i.e., the relative position between eccentric shaft 76 and mounting base 50 is locked.

In the present embodiment, the centre-to-centre spacing of eccentric shaft 76 changes between -1.0 to 1.0, since every grade of adjustment angle is 2.5 °, it is 2.5 × 2/360=0.0138 that can calculate every grade of average Adjustment precision, in the range of the Adjustment precision usually required that, It can also be seen that, the minor rotation in centre-to-centre spacing is converted at the same time on the angle value that more preferably measures, to reduce and adjust processing The size of error.Centre-to-centre spacing between adjustment transition gear 57 and output gear 75 is reached by the corner of eccentric rotation axis 6, that is, is adjusted Sideshake between both whole.

As shown in figure 11, then by adjusting the corner of adjusting screw 746, promote installing plate 73 towards input gear 741 to The close direction movement of transition gear 757, and achieve the purpose that adjustment sideshake between the two.

Referring to Fig. 6, Fig. 7, Fig. 8 and Figure 16, right curved round mould 521, left curved round mould 522 and right curved round mould are with stacked system and same It is sleeved in drive shaft 54 axis, in utility model embodiment, stacked system can be that both directly contact in the axial direction, Also fixed or spacing keeper can be added between the two；The fixing end 5100 of swing arm 51 is also sleeved in drive shaft 54, so that Three round moulds are driven to be rotated with rotation axis of the swing arm 51 around drive shaft 54 by drive shaft 54, i.e., three round moulds and swing arm 51 common drive shafts.Three clampings coaxial arrangement corresponding with three round moulds.

Referring to Fig. 1 to Figure 16, it is processor to treat elbow member to carry out bend pipe operation detailed process using this CNC tube bending machine Computer program stored in memory is performed to realize following steps：

First direction bend pipe step, it is assumed that be left bend pipe step, at this time, the position of three round moulds, guided mode 4 and three clampings Distribution is as shown in fig. 6, i.e. edge treats that elbow member is axially directed toward the direction of head 5, swing arm 51, clamping, left curved guided mode by feeding trolley 2 43 are respectively positioned on the right side of round mould, i.e., they are located at left bend pipe position, and control bend pipe motor 55 is driven by drive shaft 54 to be put Arm 51, clamping are rotated with circle mould towards first direction, and bend pipe behaviour is carried out the pipe section being clamped in left curved round mould with corresponding clamping Make, while control feeding trolley 2 to drive feeding main shaft 24 to drive left curved guided mode 43 along the axial synchronous fortune of pipe fitting with guided mode unit 4 It is dynamic.

In this step, feeding trolley 2 enters waiting position, treats that elbow member is sent by operative employee or additional automatic feed mechanism Enter in clamping jaw 240, after pressing startup, clamping jaw cylinder 27 acts, and promotes clamping jaw 240 to clamp pipe fitting.Feeding servomotor 26 passes through Rack and pinion mechanism driving feeding main shaft 24 drives pipe fitting to be moved on guide rail, feeding before and after realization.

Rotating servo motor 25 drives feeding main shaft 24 to rotate by synchronous belt, realizes that pipe fitting rotates.Feeding trolley is sent The rotation of material and main shaft is driven by servomotor, and to ensure repetitive positioning accuracy, the use of rack-and-pinion is more being lifted While the bearing capacity of feeding trolley, effective control noise.

Feeding trolley 2 send pipe fitting to designated position, and oil cylinder 63 acts, and promotes clamping seat 60 to drive clamping campaign and leans on Nearly left curved round mould, clamps pipe fitting.At this time, the servomotor 491 in guided mode unit 4 acts, and left curved guided mode 43 is moved to pair The operating position answered drives swing arm to be rotated synchronously with circle mould, realizes bend pipe so that against on pipe fitting, then bend pipe motor 55 rotates Operation.

When needing to carry out second of bend pipe in same mould position, clamping and left curved guided mode 43 can unclamp, and feeding trolley 2 can push away Dynamic pipe fitting moves to new position, turns certain angle if necessary to pipe fitting, and at this moment rotating servo motor 25 rotates, and drives feeding master Axis 24 rotates, and realizes the rotation of pipe fitting different angle, and then clamping and left curved guided mode 43 clamp, and swing arm 51 rotates, and realizes same Station bend pipe again.From feeding before and after feeding trolley 2, feeding main shaft 24 rotate, swing arm 51 rotate it is common coordinate realize that three-dimensional is curved Pipe.

During bend pipe, axial oil cylinder 47 can promote guided mode to be acted along line slideway 481, make left curved guided mode 43 and swing arm It is synchronized with the movement, while feeding trolley 2 can also push pipe fitting and be synchronized with the movement with swing arm 51, prevent pipe fitting to be pulled out of shape.

, need to be in above-described embodiment when needing using different elbow radius mould positions to realize the switching of different bend pipe diameters The different left curved round mould of one layer of elbow radius is superimposed in structure again, clamping and left curved guided mode 43 unclamp, and servomotor 361 acts, It is driven by screw 363, drives whole head to laterally move, is made left curved round mould pipe fitting slightly away, avoid interference with, then watch Take motor 353 to act, be driven by screw 353, drive whole head 5 to move up and down to mould position is needed, then servomotor 361 Movement, makes the curved round mould in an another left side and 2 center alignment of feeding trolley, then drives clamping, left curved guided mode 43 to clamp, and drive swing arm 51 move with circle mould, realize different mould positions bend pipe.

Step is changed the mold, keeps pipe fitting static with respect to rack 11 in the horizontal, the left curved round mould of control and clamping and left curved guided mode 43 open with release plumbing component, and control switch unit driving head 5 round mould is transversely deviateed to avoid pipe fitting, then driving machine First 5, which are vertically moved downward to the top of head 5, avoids pipe fitting；Bend pipe motor 55 is controlled to drive circle mould with swing arm 51 around drive shaft 54 rotation axis is rotated to second direction bend pipe position from first direction bend pipe position；Control 5 edge of switch unit driving head The top that pipe fitting is located at position between right curved round mould and corresponding clamping is laterally moved to, then drives head 5 to move vertically upwards It is contour with pipe fitting to right curved round mould and to drive head 5 to laterally move coaxially arranged to right curved round mould and pipe fitting, then drive pair Clamping is answered to clamp pipe fitting.

In this step, it is necessary to when carrying out reverse bend pipe, i.e., dextrad bend pipe when, clamping and left curved guided mode 43 can unclamp, and watch Take motor 362 to act, be driven by screw 363, drive whole head motion, make left curved round mould pipe fitting slightly away, avoid doing Relate to, then servomotor 351 acts, and is driven by screw 353, drives whole head 5 to be moved downward to designated position, avoids pipe Part is interfered with the top of head 5；Then bend pipe motor 55 acts, and makes the axis of swing arm 51, clamping with circle mould around drive shaft 54 Line rotates 180 degree, switches to right bend pipe position so as to be rotated under the driving of bend pipe motor 55 from left bend pipe position, that is, is switching During bend pipe direction, bend pipe motor 55 drives circle mould and swing arm 51 between left bend pipe position and right bend pipe position by drive shaft 54 Switching rotates.Then, control servomotor 361 to drive head 5 to laterally move to pipe fitting and be located at clamping and the meta of right curved round mould The surface put, and control servomotor 491 to rotate and make the corresponding curved guided mode 42 in the right side positioned at the left side of right curved round mould, and the two Between spacing ensure head 5 rise when will not interfere with pipe fitting；Then servomotor 351 is controlled to drive head 5 to rise to right curved circle Mould and pipe fitting isometry position, and it is coaxial with pipe fitting to right curved round mould to control 361 action drives head 5 of servomotor to laterally move Arrange, then drive cylinder 63 acts and promotes corresponding clamping clamping pipe fitting and control servomotor 491 to drive left angle coupling mould 42 Pipe fitting is clamped, at this time, circle mould, guided mode 4 and the position distribution of clamping are as shown in figure 16, i.e., edge treats that elbow member is axial by feeding trolley 2 are directed toward the direction of heads 5, and swing arm 51, clamping, right curved guided mode 42 are respectively positioned on the left side of round mould, i.e., they are located at right bend pipe position Place.

Second direction bend pipe step, control control bend pipe motor 55 drives swing arm 51 to be rotated with circle mould towards second direction, right The pipe section for being clamped in right curved round mould and right angle coupling intermode carries out bend pipe action, while controls feeding trolley 2 to drive feeding main shaft 24 drive right curved guided mode to be synchronized with the movement vertically with guided mode unit 4.Detailed process is referring to first direction bend pipe step.

After all bend pipe releases, clamping and guided mode 4 can unclamp, and clamping jaw unclamps, after removing curved good product manually, Startup is pressed, clamping, guided mode, feeding trolley and all mould positions reset, return to initial position, press and open after feeding again Dynamic, above-mentioned action is realized in repetition.

Embodiment 2

As the explanation to the utility model embodiment 2, the difference only pair with above-described embodiment 1 is said below It is bright, i.e., only the structure of clamping component is illustrated.

Referring to Figure 17 and Figure 18, by setting pin hole 5170 on the sidewall paneling of installation 50, in the present embodiment, adjustment is locked Determine mechanism and further include check pin 961 and lock-screw 962, the outer end oral area of pin hole 5170 is equipped with to be engaged with lock-screw 962 Screw thread, the extruding of side wall of the inner end of check pin 961 formed with the installation axle portion 761 with eccentric shaft 76 matched arc Face 9610, makes the arc compressive plane 9610 of check pin 961 extrude the side wall of installation axle portion 761, is formed by lock-screw 962 Frictional fit face, secondary locking is carried out with the locking to 76 angle position of eccentric shaft.

Embodiment 3

As the explanation to the utility model embodiment 3, the difference only pair with above-described embodiment 1 is said below It is bright.

Referring to Figure 19 and Figure 20, the multi-turn lock hole of radially even arrangement can be set on fixed porose disc 953（In figure only Two circles are shown）, often enclose lock hole being arranged circumferentially along the porose disc.And set in gear clearance adjusts porose disc 952 same The equal multi-turn lock hole of the number of turns and radially pitch-row（Two circles are only shown in figure）, but have interval central angle between two adjacent rings Difference, so as to achieve the purpose that to adjust corner by being directed at the lock hole in different radial positions.

Embodiment 4

As the explanation to the utility model embodiment 4, the difference only pair with above-described embodiment 1 is said below It is bright.

Said gear transmission is substituted to be driven rotation and power between bend pipe motor and drive shaft using chain drive, that is, is being driven Dynamic main shaft passes through both tooth form chain links with setting gear on bend pipe motor.

Embodiment 5

As the explanation to the utility model embodiment 5, the difference only pair with above-described embodiment 1 is said below It is bright.

Referring to Figure 21, by more than one hinged guiding swing rod 964 in mounting base, to substitute in above-described embodiment 1 Arc chute, i.e., be hinged in swing arm by hinge shaft 965, and guiding 964 swinging end of swing rod is cut with scissors by hinge shaft 966 and clamping seat 96 Connect, guiding swing rod 964 is arranged with lever 963 in swing process with keeping parallelism, resistance arm of its length and lever 963 etc. It is long.The swinging end swinging track of swing rod 964 is guided to form arc-shaped guide rail of the clamping seat 96 relative to mounting base movement.

To make guiding swing rod 964 form generally planar plane of oscillation when swinging, to improve the stability of clamping driving, It can be realized by least one of following structure design：（1）By setting guiding swing rod 964 on clamping seat 96 around its end The lateral Displacement guiding groove 962 that hinge shaft 966 rotates, the i.e. cell wall of lateral Displacement guiding groove 962 offset with guiding 964 bar wall of swing rod Lean on and it is slided along cell wall and is formed generally planar plane of oscillation,（2）By being equipped with guiding lever 963 on clamping seat 96 The lateral Displacement guiding groove that is rotated around its end hinge shaft of resistance arm,（3）Guiding swing rod 964 is equipped with around its end by mounting base The lateral Displacement guiding groove that portion's hinge shaft 965 rotates.

The power set of the output straight-line displacement such as oil cylinder and power are substituted as actuator using linear motor, cylinder.

Embodiment 6

As the explanation to the utility model embodiment 6, the difference only pair with above-described embodiment 1 is said below It is bright.

Above-mentioned adjusting and locking mechanism is substituted using Fen Pandu mechanisms, to form the first gap adjusting mechanism, that is, utilizes index dial machine Structure realizes adjustment, indexing and the requirement of position and lock to angle of eccentricity.

The central scope of the utility model is to be rotated by the swing arm of bend pipe driver drives and circle mould to carry out bend pipe action And switch between left bend pipe position and right bend pipe position and rotate, and realize head between left and right bend pipe position by changing the mold unit Switching, so as to using single swing arm realize left and right altogether it is curved, the pipe fitting of complicated bend pipe requirement can be machined with, to two bend pipes The pipe fitting of position relatively carries out bend pipe processing, and carries out again bend pipe to some pipe fittings for having carried out bend pipe processing and process；Root According to this design, the structure of mold changing unit and guided mode unit also has a variety of obvious conversion；For guided mode unit, for example can adopt Monoblock type in above-described embodiment, which is substituted, with the guided mode mechanism of two single movements changes the mold unit；For changing the mold unit, its main work( Can promote head to do two dimensional motion in the plane perpendicular to pipe fitting axial direction, but be not limited to do the driving of two dimensional motion Mechanism.In addition, mold changing unit can also use linear movement output and the power such as cylinder, linear motor with the power source in guided mode unit Power set, it is not limited to the structure in above-described embodiment.In addition, the structure type of bend pipe driver is not limited to The bend pipe motor in embodiment is stated, for example, other rotary power output devices beyond motor can be used to form bend pipe driver, For example cylinder, oil cylinder linear motion are converted into and outputting rotary power by the rotary motion of gear by rack and pinion mechanism.

Claims (10)

1. a kind of simple pendulum arm or so is total to curved CNC tube bending machine, including rack, control unit and in the rack and by The swan neck system and feeding trolley of described control unit control, the swan neck system include head, guided mode unit and switch unit；

It is characterized in that：

The head includes left curved round mould and the right curved round mould being installed on stacked system in drive shaft, and the drive is total to circle mould The swing arm of dynamic main shaft, the clamping in the swing arm, and be sequentially connected with the drive shaft with drive round mould with it is described Swing arm carries out bend pipe rotation and switches the bend pipe driver of rotation between left bend pipe position and right bend pipe position；

The switch unit is driven the relatively described rack of the head by described control unit control perpendicular to treating elbow member Axial transverse direction is moved up with perpendicular, drives the head to switch between left bend pipe position and right bend pipe position.

2. CNC tube bending machine according to claim 1, it is characterised in that：

The guided mode unit includes cloth-guiding base, on driving mechanism and the right curved guided mode and left side that are installed on the right side of the cloth-guiding base Left curved guided mode；

The driving mechanism is driven the cloth-guiding base along the transverse shifting with left bend pipe position by described control unit control Put and switch and moved along the axial reciprocating to aid in bend pipe to act between right bend pipe position；

The switch unit is driven the guided mode unit to be synchronized with the movement with the head by described control unit control.

3. CNC tube bending machine according to claim 2, it is characterised in that：

The switch unit includes the installing plate being installed in the rack, can be pacified with sliding vertically along described by line slideway Vertical slide plate on the installing plate, can be laterally slidably installed on the vertical slide plate by line slideway along described Cross slide, the head be installed on the cross slide on；

The driving mechanism includes can be along the support being laterally slidably installed on the cross slide by line slideway Seat, the cloth-guiding base can be axially slidably installed on the support base by line slideway along described.

4. CNC tube bending machine according to claim 2, it is characterised in that：

The circle die cavity of circle mould includes curved bend pipeline section and straight line gripping section, straight line gripping section and the right side on the curved round mould in left side The direction of the straight line gripping section of angle coupling mould is opposite；

Left angle coupling mould and the non-overlapping face region of projection of the right angle coupling mould in the plane perpendicular to the axis of the drive shaft；

Circle mould and matched clamping, guided mode form adaptation module, two groups of adaptation modules of adjacent layer arrangement parallel to The non-overlapping face region of projection in the plane of the axis.

5. according to the CNC tube bending machine described in any one of Claims 1-4 claim, it is characterised in that：

Be equipped with clamping driving mechanism between the clamping and the swing arm, the clamping driving mechanism include clamping seat, reinforcement rocking bar, Reinforcement connecting rod, boosting lever and actuator, the clamping seat can arcuately guide rail be slidably mounted in the swing arm, the cause The stator of dynamic device is hinged in the swing arm；

The fixing end of the reinforcement rocking bar is hinged with the swing arm, and the mover of swinging end and the actuator is hinged；The reinforcement The fulcrum of lever is hinged in the swing arm, and force side is hinged with the clamping seat；One end of the reinforcement connecting rod and the increasing The swinging end of power rocking bar is hinged, and the force side of the other end and the boosting lever is hinged；The arc-shaped guide rail and the force side Swinging track iso-curvature radius, the fulcrum is located at the swinging track adjacent to the downside of the drive shaft.

6. CNC tube bending machine according to claim 5, it is characterised in that：

The swing arm is equipped with the side directing plate for being folded in the clamping seat both sides, and the arc-shaped guide rail is arranged on the side Arc chute on directing plate, is respectively provided with and the matched sliding block of the arc chute on the both sides of the clamping seat.

7. according to the CNC tube bending machine described in any one of Claims 1-4 claim, it is characterised in that：

The bend pipe driver is bend pipe motor, is driven between the drive shaft and the bend pipe motor by gear drive Connection, the gear drive include input gear, transition gear, output gear and gap adjusting mechanism；

The input gear, the transition gear and the output gear are helical gear；

The gap adjusting mechanism includes being used for the first gap adjusting mechanism for adjusting sideshake between the transition gear and the output gear, and For adjusting the second gap adjusting mechanism of sideshake between the input gear and the transition gear；

First gap adjusting mechanism includes eccentric shaft and for adjusting the corner of the eccentric shaft and its angle position being locked Fixed adjusting and locking mechanism, the transition gear are rotatably sleeved on the eccentric shaft.

8. CNC tube bending machine according to claim 7, it is characterised in that：

The adjusting and locking mechanism includes the fixation porose disc that is fixedly connected with the mounting base of the head, and one with the eccentric shaft Axial end rotates synchronously the gear backlash adjustment porose disc of connection, and selectively passes through a pair of locking hole on two porose discs Stop pin.

9. CNC tube bending machine according to claim 7, it is characterised in that：

Second gap adjusting mechanism includes being used for the mounting base for installing the input gear, and is installed in the mounting base of the head The upper adjustment mechanism for being used to promote the mounting base so that the direction of the input gear towards the close transition gear is moved.

10. according to the CNC tube bending machine described in any one of Claims 1-4 claim, it is characterised in that：

The curved round mould in a left side is opposite with the circle die cavity direction of the curved round mould in the right side.