CN209363360U - A kind of improved CNC tube bending machine of structure - Google Patents

Abstract

The utility model relates to a kind of improved CNC tube bending machines of structure, belong to tubular object extruding processing technology field.The head of the numerical controlled bending of pipe includes guided mode unit, bend pipe motor, swing arm and the clamping being mounted in the swing arm and clamping driving mechanism；Clamping driving mechanism includes the indoor clamping servo motor of arm body cavity for being installed in swing arm, the screw body above arm body, the clamping seat being installed on feed screw nut, and is arranged in the reduction gearing mechanism that swing arm swings end side；In the transverse direction perpendicular to feeding main shaft axial direction, bend pipe motor is installed on the end side of headstock with deviateing bend pipe main shaft；In the axial direction, bend pipe motor is located at bend pipe main shaft adjacent to the side of feeding trolley；The auxiliary-push mechanism and clamp system of guided mode unit surround the angular evacuation channel right above bend pipe motor.The optimization of structure and location layout based on functional unit each on head, can efficiently reduce the interference to bend pipe process, can be widely applied in the fields such as air-conditioning, aviation.

Description

A kind of improved CNC tube bending machine of structure

Technical field

The utility model relates to tubular object extruding equipment, specifically, being related to a kind of improved CNC tube bending machine of structure.

Background technique

CNC tube bending machine is widely used in the industrial circles such as air-conditioning, automobile, ship, aerospace, mainly includes rack, control Unit processed and it is mounted on the rack the feeding trolley and head controlled by control unit；Head includes headstock, is mounted on the machine Guided mode unit, bend pipe motor, bend pipe main shaft and bend pipe torque transmission mechanism on headstock, are co-axially mounted on bend pipe main shaft Circle mould and swing arm, and the clamping and clamping driving mechanism that are mounted in swing arm；Circle mould is mounted on swing arm for controlling elbow radius Upper clamp formwork clamps pipe fitting together with circle mould under the driving of clamping driving mechanism, and under the driving of bend pipe main shaft, and it is synchronous around The rotation axis rotation of bend pipe main shaft is to carry out bend pipe movement to pipe.

During bend pipe, pipe and circle mould, clamping are wanted in the undesirable skidding of bending tube forming process appearance in order to prevent It asks clamping and the chucking power of circle intermode to reach certain dynamics or more, cooperates frequently with oil cylinder or cylinder and force-increasing mechanism, such as announce Number for CN207119660U patent document disclosed in clamping component, the clamping driving mechanism of clamp die mechanism includes that reinforcement shakes Bar, reinforcement connecting rod, lever and cylinder or oil cylinder, as shown in its attached drawing, cylinder exists in clamping process to be swung, and in bend pipe Size is larger in the axial direction of main shaft, and easily causes to interfere to forming elbow process, is unfavorable for bending forming special shape together Bend pipe structure.

Further, since bend pipe motor is usually mounted to the lower section of round mould and horizontally spacing is smaller, such as Publication No. CNC tube bending machine disclosed in the patent document of CN107626785A, as shown in its attached drawing 5, the location arrangements of bend pipe motor 32 Easily the bending tube forming process of pipe is caused to interfere.

Utility model content

The purpose of the utility model is to provide a kind of improved CNC tube bending machines of structure, so that its handpiece structure layout is more Rationally reduce the interference to bend pipe process.

To achieve the goals above, CNC tube bending machine provided by the utility model includes rack, control unit and is mounted on The head and feeding trolley controlled in rack and by control unit, head include headstock, the guided mode list being mounted on headstock Member, bend pipe motor, bend pipe main shaft and bend pipe torque transmission mechanism, circle mould and the swing arm being co-axially mounted on bend pipe main shaft, and The clamping and clamping driving mechanism being mounted in swing arm；Clamping driving mechanism includes being installed in the indoor clamping of arm body cavity of swing arm Servo motor, the folding direction arrangement along clamping and the screw body above arm body, the clamping being installed on feed screw nut Seat, and it is arranged between screw rod and clamping servo motor and is located at the reduction gearing mechanism of the swing end side of swing arm；Clamping servo electricity The armature spindle of machine is along folding direction arrangement；In the transverse direction perpendicular to feeding main shaft axial direction, bend pipe motor is with deviateing bend pipe main shaft It is installed on the end side of headstock；In the axial direction, bend pipe motor is located at bend pipe main shaft adjacent to the side of feeding trolley；Guided mode unit Including cloth-guiding base, the guided mode being installed on cloth-guiding base and the clamp system and auxiliary-push mechanism driven by servo motor, auxiliary-push mechanism The evacuation channel right above bend pipe motor is surrounded with clamp system.

Cooperated using the indoor servo motor of arm body cavity for being located at swing arm with the screw body being located above arm body, substitution is existing There is the oil cylinder etc. in technology, to reduce operation noise, improve precision and energy conservation and environmental protection；Meanwhile being matched with the position of bend pipe motor Arrangement and the cooperation of the structure of guided mode unit, optimize the layout of each functional unit on entire head, are done with reducing to bend pipe process It relates to.

Specific scheme is clamping seat by being slidably mounted on arm body along the guide rail mechanism for opening and closing direction arrangement； It is axial perpendicular to feeding main shaft it is vertical on, screw rod front end is installed in rotation on clamping seat, and face position in its transverse direction In on the first lateral face or top in the first lateral face；First lateral face is the vertical installation site positioned at clamping on clamping seat Middle position, and the plane being arranged along the horizontal；It screw rod rear end can by the support base on the swinging end for being installed in swing arm It is rotatably mounted on arm body；Evacuation channel is angular evacuation channel；Evacuation channel upwardly extends most head space structure.Opposite folder The installation site of mould, screw body to the point of application of clamping seat be located in upper position, not only can be reduced in clamping process to screw rod The torque applied, especially multilayer mould clamping structure, to improve the service life of screw rod, also and the cooperation with guide rail mechanism Improve the overall stiffness of clamping process.

It is planetary roller screw body that more specific scheme, which is screw body,；Reduction gearing mechanism includes that vertical synchronous belt subtracts Fast mechanism, vertical synchronous belt deceleration mechanism include the input belt wheel with the transmission connection of the armature spindle of clamping servo motor, coaxially The output pulley being installed on screw rod rear end, and engage with two belt wheels and vertically arranged synchronous belt；Clamping servo motor Armature spindle and input belt wheel between by speed reducer drive connect, input belt wheel be coaxially installed on the output shaft of speed reducer； Speed reducer is coaxial-type speed reducer, and the armature spindle of the input shaft and clamping servo motor of coaxial-type speed reducer is coaxially arranged.Using Planet screw rod, short, the compact-sized advantage using its feed screw nut, to reduce the length of swing arm；In addition, being carried based on screw rod Greatly, lead is small and make little specific of its driving moment, is driven using synchronous belt, to solve that pendulum will be moved on screw body Above arm, setting is located at the problem that span is big between the screw rod and motor occurred behind top in clamping installation site.

It is ball wire rod mechanism that another more specific scheme, which is screw body,；Reduction gearing mechanism is gear train deceleration Case, support base are the Gearbox being installed on swinging end；Clamping seat includes the bottom plate connected with the sliding block on guide rail mechanism, Box portions of the bottom plate on the one end of bend pipe main shaft are installed in, and are installed in the side that box portions deviate from bend pipe main shaft Portion and the triangle reinforcement floor portion between the other end of bottom plate；Clamping is removably attached to box portions adjacent to bend pipe master On the end side of axis；The axial forward end of feed screw nut is fixedly connected with box portions away from the end side of bend pipe main shaft, axial rearward end position Deviate from the side of box portions in axial forward end；Oblique pull reinforcement floor is installed between the upper end and arm body of Gearbox； The spring bearing being sleeved on screw rod rear end is arranged in reduction gearbox；Guide rail mechanism is rolling guide.Pass through feed screw nut's Front end is rotatably fixedly connected with clamping seat, and the spring bearing of screw rod is arranged in reduction gearbox, can be efficiently reduced The length of swing arm.

It includes synchronous belt drive mechanism and gear train deceleration mechanism that preferred scheme, which is bend pipe torque transmission mechanism,；Gear train Deceleration mechanism includes the input gear axle being installed in rotation on headstock, output gear shaft and more transition gear axles, and Coaxially it is installed on gear shaft and is located at the indoor gear of chamber of headstock；Synchronous belt drive mechanism includes and bend pipe motor The input belt wheel of armature spindle transmission connection, the output pulley being coaxially installed in input gear axle, and engaged with two belt wheels Synchronous belt；Output gear shaft constitutes bend pipe main shaft；Along the transmission direction of bend pipe torque, input gear axle, transition gear axle and defeated The axis of gear shaft is parallel out and non-coplanar arrangement；The stator of bend pipe motor is higher than the lower surface of headstock or holds with lower surface Flat, the stator of bend pipe motor is located at the top of the input belt wheel of synchronous belt drive mechanism and prolongs towards the direction away from the input belt wheel Stretch arrangement.The structure for mechanism of slowing down is configured to include synchronous belt deceleration mechanism and gear train deceleration mechanism, it can be by adjusting two The ratio between the number of teeth between a synchronous pulley, and different reduction ratio are obtained, to adapt to the pipe fitting requirement of different size；And utilize gear shaft Location arrangements and make bend pipe motor with deviateing bend pipe main shaft in position be located at headstock side by, can efficiently reduce bend pipe electricity Interference of the machine to bend pipe process.

It includes an ontology and the spindle drum for being rotatably mounted bend pipe main shaft that preferred scheme, which is headstock,；Main shaft Seat is from lateral ends of seat ontology, axially towards away from the direction of feeding trolley protrusion；Seat ontology constitutes L together with spindle drum Type base structure；Along transmission direction, input gear axle, transition gear axle and output gear shaft are along the long corner of L-type base structure To short leg it is arranged to substantially L-type shape；The stator lower end of bend pipe motor present ontology is installed by motor mounting plate On the end side of another transverse end, the lower face of motor mounting plate is higher than the lower surface of seat ontology or maintains an equal level with lower surface, input tape Wheel is coaxially installed on armature spindle；The lower end of input gear axle stretches out seat ontology and is located at the lower section of seat ontology；Output pulley It is installed on the lower end of input gear axle, and is located at the lower section of seat ontology.

Further embodiment is the top that guided mode unit is located at headstock lower surface；Another lateral ends of seat ontology, edge The axial bend pipe motor that is located at transversely extends towards the direction far from bend pipe main shaft adjacent to the side of bend pipe main shaft and is formed with motor Mounting base；The upper surface of motor mount is installed with to be located on the upper surface of seat ontology with being arranged along the horizontal, and solid with seat ontology Traversing guide rail mounting base even；Clamp system includes the cross slide way being fixed in traversing guide rail mounting base, passes through traversing sliding block And it is slidably mounted in the guided mode slide on cross slide way, the traversing servo electricity being installed on the lower surface of motor mount Machine, screw body, and the reduction gearing mechanism being arranged between screw rod and traversing servo motor；The armature spindle edge of traversing servo motor Lateral arrangement, and the torque output shaft end of armature spindle is located at the side that its stator deviates from bend pipe main shaft；Guided mode slide and screw rod spiral shell Mother is fixedly connected；The evacuation chamber for avoiding screw rod front end is equipped in guided mode slide, screw rod rear end is by being installed in electricity Support base on the outer end of machine mounting base and be installed in rotation on an ontology；It is higher than on the downside of the stator of traversing servo motor The lower surface of seat ontology；Auxiliary-push mechanism includes the axial guidance being installed on guided mode slide axially disposedly, is installed in guided mode Auxiliary on slide pushes away servo motor, screw body, and is arranged in screw rod and the auxiliary reduction gearing mechanism pushed away between servo motor；It is auxiliary to push away The armature spindle of servo motor is axially disposed, and the torque output shaft end of armature spindle is located at one that its stator deviates from bend pipe main shaft Side；Cloth-guiding base is slidably mounted on axial guidance by sliding block, and is fixedly connected with feed screw nut；Clamp system and/ Or in auxiliary-push mechanism, screw body and reduction gearing mechanism are planetary roller screw rod and synchronous belt deceleration mechanism, are ball-screw Fast mechanism or ball-screw and synchronous belt deceleration mechanism are kept to gearbox drive.First guided mode is oriented to existing guided-mode structure After component and guided mode transmission parts concentrate on cloth-guiding base, then the technical solution being installed on headstock is different, this technology side Guiding parts is directly mounted on headstock by case, not only can be reduced the quantity of components, and can improve overall structural strength； The traversing driving motor of guided mode unit is arranged in headstock, the integral structure layout of guided mode unit can be preferably optimized.

Further embodiment be it is axial perpendicular to feeding main shaft it is vertical on, the lower surface of headstock, arm body following table The lower face of face and the motor mounting plate for installing bend pipe motor substantially maintains an equal level.Advanced optimize the overall structure cloth of head Office, to be further reduced the interference to bend pipe process.

Round mould centering installation axle is installed on the upper end of bend pipe main shaft, the upper end of bend pipe main shaft and circle mould centering are installed In the lower end of axis, for concave relief at there is the indent conical surface, another one is the cone structure being adapted to the indent conical surface in the end face of one； Across the blind rivet of the interior axis hole of bend pipe main shaft, removably cooperate with the threaded hole being set in circle mould centering installation axle, and curved Bend pipe main shaft and circle mould centering installation axle are tensed in the axial direction of pipe main shaft.Utilize matching for cone structure and blind rivet and keyway arrangements It closes, larger torque can not only be transmitted in bend pipe main shaft and circle mould centering installation between centers, and pacify convenient for bend pipe main shaft and circle mould centering The dismounting of between centers is filled, to replace different round moulds according to mould specification demand in actual processing, especially for multilayer circle mould knot Structure.

Preferred scheme is that concave relief at there is the indent conical surface, feel relieved under installation axle by circle mould in the upper surface of bend pipe main shaft End is cone structure；The circle mould of multilayer difference elbow radius is sleeved on outside round mould centering installation axle with stacked system, and in circle It is compressed on the upper end of mould centering installation axle with fixing piece；It is removably installed on clamping seat and different layers circle mould Xiang Shi The clamping matched；The fixed end cap of swing arm is outer mounted in bend pipe main shaft and passes through the axis side switch slot structure axially arranged along bend pipe main shaft It is fixedly connected, the side keyway between adjacent two layers circle mould and between bottom circle mould and the fixing end of swing arm by being arranged along the horizontal Structure is fixedly connected；The mold changing unit driven by servo motor is installed, for driving by headstock between headstock and rack The feeding main shaft for making clamping with the opposite feeding trolley of circle mould, perpendicular to feeding main shaft axial direction transverse direction with vertically on synchronously make Two-dimensional space is mobile.The indent conical surface is set on the wheel shaft of output, the bonding strength between the two can be effectively improved.

Detailed description of the invention

Fig. 1 is the perspective view of head in the utility model embodiment 1；

Fig. 2 is perspective view of the head on another visual angle in the utility model embodiment 1；

Fig. 3 is the bottom view of head in the utility model embodiment 1；

Fig. 4 is the side view of head in the utility model embodiment 1；

Fig. 5 is the perspective view that unit is changed the mold in the utility model embodiment 1；

Fig. 6 is headstock in the utility model embodiment 1, bend pipe motor, bend pipe main shaft, circle mould centering installation axle and bend pipe The perspective view of torque transmission mechanism；

Fig. 7 is headstock in the utility model embodiment 1, bend pipe motor, bend pipe main shaft, circle mould centering installation axle and bend pipe The structure chart of torque transmission mechanism；

Fig. 8 is A partial enlarged view in Fig. 7；

Fig. 9 is headstock in the utility model embodiment 1, bend pipe motor, bend pipe main shaft and bend pipe torque transmission mechanism Bottom view；

Figure 10 is the perspective view of guided mode unit in the utility model embodiment 1；

Figure 11 is the structure chart for compressing transmission mechanism in the utility model embodiment 1 on guided mode unit；

Figure 12 is perspective view of the guided mode unit under another visual angle in the utility model embodiment 1；

Figure 13 is the perspective view of sandwich mold unit in the utility model embodiment 1；

Figure 14 is the structure chart of sandwich mold unit in the utility model embodiment 1；

Figure 15 is the perspective view of sandwich mold unit in the utility model embodiment 2；

Figure 16 is the structure chart of sandwich mold unit in the utility model embodiment 2；

Figure 17 is the structural exploded view of 2 middle gear reduction gearbox of the utility model embodiment.

Specific embodiment

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

Embodiment 1

Referring to Fig. 1 to Figure 14, this CNC tube bending machine includes rack, control unit and is mounted on the rack and is controlled list by this The head 1 and feeding trolley of member control.Head includes mold changing unit 2, headstock 3, be mounted on guided mode unit 4 on headstock 3, Bend pipe motor 10, bend pipe main shaft and bend pipe torque transmission mechanism, the circle mould 12 being co-axially mounted on bend pipe main shaft and swing arm 5, And it is mounted on clamping 13 and clamping driving mechanism 6 in swing arm 5.What bend pipe torque transmission mechanism was used to export in bend pipe motor 10 Torque transfer gives bend pipe main shaft, and to drive clamping 13 and circle mould 12 to rotate synchronously, pipe is shaped to corresponding curved pipe structure.

In the present embodiment, control unit includes processor, memory and touch control screen, and processor passes through touch control Screen receive operator input instruction, while by execute be stored in memory correspond to computer program control head and Feeding trolley acts and executes bend pipe operation.

Can refer to publication No. to the specific structure of rack and feeding trolley in this present embodiment is CN107470408A's Structure as shown in Figure 3 in bending machine disclosed in patent document.That is, feeding trolley includes that the feeding being fixed on the rack is led Rail is slidably mounted in the feeding slipway on feeding guide by sliding block, fixes along the direction arrangement for being parallel to feeding guide Feeding rack gear on the rack, the feeding main shaft that can around own axis be mounted on feeding slipway, is mounted on feeding master Axis front end and the three-clove style clamping jaw driven by clamping jaw cylinder, the rotating servo motor for driving feeding main shaft to rotate, by setting The feeding servo motor for driving feeding slipway to move back and forth along feeding guide in the gear and the cooperation of feeding rack gear on armature spindle, And the fixed travel switch that the stroke of feeding slipway is controlled on the rack.

In described below, for Unified Characterization relative positional relationship, pipe is pipe fitting of the clamping in feeding main shaft, will Feeding main shaft is axially preset as arranging in the horizontal direction, i.e., arranges along Y-axis shown in figure, make the axial direction of pipe along level Direction arrangement, X axis and Z axis to the transverse direction perpendicular to feeding main shaft axial direction respectively constituted in the present embodiment with vertically.

Referring to Fig. 5, changing the mold unit 2 includes head fixture plate 20, vertical shift driving mechanism 21, longitudinal rail 22, vertical shift sliding block 23, head slide plate 24, traversing driving device 25, cross slide way 26, traversing sliding block 27, traversing position detecting mechanism and vertical shift position Testing agency.

Head fixture plate 20 is removably mounted in rack by fixing pieces such as bolts；Head slide plate 24 is led by longitudinal The cooperation of rail 22 and vertical shift sliding block 23 and can be along Z axis to being back and forth slidably mounted in head fixture plate 20.Vertical shift driving mechanism 21 include 211,90 degree of corner speed reducers 212 of servo motor along X axis arrangement, screw rod 214 from Z axis to arrangement and and screw rod along 214 feed screw nuts screwed；The input shaft of 90 degree of corner speed reducers 212 and the armature spindle of servo motor 211 are sequentially connected, output Axis and screw rod 214 are sequentially connected, and the power that servo motor 211 exports is slowed down and passes to screw rod 214 after increasing square；Screw rod 214 are installed in rotation in head fixture plate 20 by the bearing being mounted on bearing block 213, and feed screw nut is fixed on machine On head slide plate 24, to pass through the positive and negative rotation of servo motor 211, to drive head slide plate 34 with respect to head fixture plate 20 along Z Axial reciprocating is mobile.

Headstock 3 can be slidably mounted on head by the cooperation of cross slide way 26 and traversing sliding block 27 along X axis and slide On plate 24；Traversing driving device 25 include 251,90 degree corner speed reducers 252 of servo motor, along X axis arrange screw rod 256 and The feed screw nut 254 screwed with screw rod 256；The input shaft of 90 degree of corner speed reducers 252 and the armature spindle of servo motor 251 are driven Connection, output shaft and screw rod 256 are sequentially connected, and the power that servo motor 251 exports is slowed down and passes to silk after increasing square Bar 256；Screw rod 256 is installed in rotation on head slide plate 24 by the bearing being mounted on bearing block 253, feed screw nut 254 are fixed on head slide plate 24 by link block 255, to pass through the positive and negative rotation of servo motor 251, to drive head The opposite head slide plate 24 of seat 3 is moved back and forth along X axis.To in the common drive of vertical shift driving mechanism 21 and traversing driving device 25 Under making, headstock 3 can make two-dimensional space movement relative to machine head plate 20 in perpendicular to the vertical plane to elbow member axial direction.

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

Referring to Fig. 1 to Fig. 4 and Fig. 6 to Fig. 9, headstock 3 is Split type box body structure, is spelled by upper pedestal 31 and lower base 32 It closes, and forms the chamber 30 for accommodating gear shaft and gear set in bend pipe torque transmission mechanism in inside.

As shown in fig. 6, headstock 3 includes the seat ontology 301 and seat sheet for the rectangle structure that length direction is arranged along X axis The front of one cross side end of body 301 forms main shaft mounting base 302 towards the positive protrusion of Y-axis, with composition substantially L-type Base structure.

In another lateral ends of upper pedestal 31, it is located at bend pipe motor 10 adjacent to the side of bend pipe main shaft, along X along Y-axis Axial to be formed with motor mount 303 towards the direction extension far from bend pipe main shaft, motor mount 303 is inverted U-shaped structure, with Motor installation cavity room 3030 is formed, i.e., in the transverse direction perpendicular to feeding main shaft axial direction, bend pipe motor 10 is with deviateing bend pipe main shaft It is installed on the end side of headstock 3, bend pipe motor 10 is located at bend pipe main shaft adjacent to the side of feeding trolley.In motor mount 303 upper surface is installed with to be located on the upper surface of upper pedestal 31 along X axis arrangement, and traversing is led with what upper pedestal 31 was connected Rail mounting base 304, i.e., on the traversing fixed present ontology 301 of guide rail mounting base 304.

In the present embodiment, bend pipe torque transmission mechanism includes synchronous belt drive mechanism and gear train deceleration mechanism；Along curved The transmission direction of pipe torque, gear train deceleration mechanism include the input gear axle 71, transition gear axle 72, transition tooth sequentially arranged The both ends of wheel shaft 73, transition gear axle 74, transition gear axle 75 and output gear shaft 76, every rooted tooth wheel shaft pass through bearing respectively Be rotatably installed on the axis hole of pedestal so that every rooted tooth wheel shaft be installed in rotation on upper pedestal 31 and lower base 32 it Between, and it is removably installed with gland 77 in the axis hole of upper pedestal 31, it is coaxial by keyway arrangements in input gear axle 71 Ground is installed with pinion gear 781, is coaxially installed with gear wheel 782 and small tooth by keyway arrangements in every transition gear axle 72 Wheel 783, is coaxially installed with gear wheel 784 on output gear shaft 76 by keyway arrangements.Along the transmission side of bend pipe torque To the gear wheel on the gear shaft of downstream is engaged with the pinion gear on the gear shaft of upstream, increases the gear of square to constitute one and slow down It is transmission mechanism.Synchronous belt drive mechanism includes the input belt wheel 791 with the transmission connection of the armature spindle of bend pipe motor 10, coaxially The output pulley 792 being installed on the lower end of input gear axle 71, and the synchronous belt engaged with two belt wheels, in the present embodiment In, input belt wheel 791 is small pulley, and output pulley 792 is big belt wheel, and forms synchronous belt deceleration mechanism, to pass through tooth The cooperation of train deceleration mechanism and synchronous belt deceleration mechanism, and realize the purpose of heavily loaded bend pipe, to construct heavily loaded bending machine.Output Gear shaft 76 constitutes the bend pipe main shaft in the present embodiment.

Along the direction of travel of bend pipe torque transmission, input gear axle 71, transition gear axle 72, transition gear axle 73, transition The axis of gear shaft 74, transition gear axle 75 and output gear shaft 76 is along Z axis to arrangement and non-coplanar arrangement, to input tooth Wheel shaft, transition gear axle and output gear shaft to short leg are arranged to substantially L-type shape along the long corner of L-type base structure Shape to make bend pipe motor 10 deviate bend pipe main shaft in the X-axis, and is located in Y-axis adjacent to the side of feeding trolley.Its In, bend pipe motor 10 installs the present ontology 301 another lateral end side not ipsilateral with shaft seat 302 by motor mounting plate 100 Side by.

Motor mounting plate 100 is L-type structure, is removably attached to the gusset portion 1002 of arrangement by bolt along Z axis Seat ontology 301 lateral end side on, along the face XOY arrangement gusset portion 1001 lower face be higher than seat ontology 301 lower surface or Maintain an equal level with the lower surface, so that the stator of bend pipe motor 10 is higher than the lower surface of headstock 3.The stator lower end of bend pipe motor 10 Be removably mounted in gusset portion 1001 by bolt, armature spindle pass through be set to the gusset portion 1001 on through-hole after with input Belt wheel 791 is fixedly connected, so that the stator of bend pipe motor 10 is located at the top of input belt wheel 791 and towards away from input belt wheel 791 Direction be disposed to extend.The lower end of input gear axle 71 stretches out seat ontology 301 and is located at the lower section of seat ontology 301；Output pulley 792 are coaxially installed on the lower end of input gear axle 71 by keyway arrangements, and are located at the lower section of seat ontology 301.

As shown in Figure 6 to 8, the circle mould of three layers of different elbow radius passes through circle mould centering installation axle 11 and bend pipe main shaft On axially mounted on bend pipe main shaft, i.e., centering matching is carried out using the installation site of circle mould 11 pairs of installation axle round moulds of centering.Circle mould Installation axle 11 of feeling relieved is coaxially removably affixed with the upper end of output gear shaft 76；In the present embodiment, the tool between the two Attachment structure is that concave relief and justifies mould centering installation axle 11 at there is the indent conical surface 760 in 76 upper surfaces of output gear shaft Lower end be the cone structure 110 being adapted to the indent conical surface 760；Across the blind rivet of the interior axis hole 761 of output gear shaft 76 762, removably cooperate with the threaded hole being set in circle mould centering installation axle 11, and in the axial direction of circle mould centering installation axle 11 Circle mould centering installation axle 11 and output gear shaft 76 are tensed, even if the indent conical surface 760 and 110 snap fit of cone structure, thus Convenient for replacing the circle mould of different size, the especially replacement to multilayer circle mode structure according to bend pipe specification.In the present embodiment, more The son circle mould 121,122,123 of the different elbow radius of layer is sleeved on outside round mould centering installation axle 11 with stacked system, more to constitute The circle mould 12 of layer structure, and compressed on the upper end of circle mould centering installation axle 11 with fixing pieces such as nuts.Swing arm 5 is consolidated Fixed end 51 is sleeved on outside the upper end of output gear shaft 76 and connects by the way that the axis side switch slot structure axially arranged along its axis is fixed It connects, as shown in fig. 6, the axis side switch slot structure includes the axial keyway 765 being arranged on the upper end of output gear shaft 76；Adjacent two Connect between layer circle mould and by the way that the side keyway structure being arranged along the horizontal is fixed between bottom circle mould and the fixing end 51 of swing arm 5 It connects.

Referring to Figure 10 to Figure 12, guided mode unit 4 is including cloth-guiding base 41, the guided mode 42 being installed on cloth-guiding base and by servo electricity The clamp system and auxiliary-push mechanism of machine driving.Guided mode 42 includes suitable with three son circle 121,122,123 phases of mould in position, specification The sub- guided mode 421,422,423 matched, each sub- guided mode are removably mounted on cloth-guiding base 41 by the cooperation of dovetail groove and key.

Clamp system include be fixed in traversing guide rail mounting base 304 and along X axis arrangement cross slide way 81, pass through cross It moves sliding block 82 and the guided mode slide 83 on cross slide way 81 can be slidably mounted on along X axis, be installed in motor mount 303 On lower surface and be located at motor chamber 3030 in traversing servo motor 84, screw body 85, and be arranged in screw rod 851 with it is traversing Reduction gearing mechanism 86 between servo motor 84.

In the present embodiment, screw body 85 uses planetary roller screw body, matchedly, reduction gearing mechanism 86 Cooperated using speed reducer 87 with vertical synchronous belt deceleration mechanism and is built into；Vertical synchronous belt deceleration mechanism includes passing through keyway arrangements And it is coaxially installed in the small pulley 881 on the output shaft of speed reducer 87, screw rod 851 is coaxially installed in by keyway arrangements Rear end on big belt wheel 882, and with two belt wheel synchro-meshings and vertically arranged synchronous belt 883；In the present embodiment In, speed reducer 87 is coaxial-type speed reducer, and the input shaft of speed reducer 87 and the armature spindle of traversing servo motor 84 are coaxially arranged, and It is sequentially connected by shaft coupling, i.e., the armature spindle of traversing servo motor 84 is sequentially connected by speed reducer 87 and small pulley 881.

The armature spindle of traversing servo motor 84 is arranged along X axis, and the torque output shaft end of armature spindle is located at its stator back Side from bend pipe main shaft；Guided mode slide 83 is fixedly connected by nut mounting base 853 with feed screw nut 852, in guided mode slide The evacuation chamber 830 for avoiding screw rod front end is equipped in 83, screw rod rear end is by being installed in the outer of motor mount 304 Support base 89 on end and be installed in rotation on an ontology 301, i.e. the spring bearing of screw rod rear end is installed in support In axis hole on seat 89, in the present embodiment, support base 89 is plate body structure；The stator downside of traversing servo motor 84 is higher than The lower surface of seat ontology 301, so that guided mode unit 4 is integrally higher than the lower surface of headstock 3.

Auxiliary-push mechanism includes the axial guidance 91 being installed on guided mode slide 83 along Y-axis arrangement, and it is sliding to be installed in guided mode Auxiliary on seat 83 pushes away servo motor 94, screw body 95, and is arranged in screw rod 951 and the auxiliary deceleration transmission pushed away between servo motor 94 Mechanism 96；The auxiliary armature spindle for pushing away servo motor 94 is arranged along Y-axis, and the torque output shaft end of armature spindle is located at its stator and deviates from The side of bend pipe main shaft；Cloth-guiding base 41 is slidably mounted on axial guidance 91 by sliding block 92, and solid with feed screw nut 952 Fixed connection.In the present embodiment, screw body 95 uses ball wire rod mechanism, and reduction gearing mechanism 96 is synchronous cross band deceleration Mechanism；Synchronous cross band deceleration mechanism includes coaxially being installed on the auxiliary armature spindle for pushing away servo motor 94 by keyway arrangements Small pulley 961, the big belt wheel 962 being coaxially installed in by keyway arrangements on the screw rod rear end of screw rod 951, and with two A belt wheel synchro-meshing and vertically arranged synchronous belt 963.Feed screw nut 952 is fixedly connected with cloth-guiding base 41.Such as Figure 11 institute Show, the space 8500 between cross slide way 81 and traversing servo motor 84 is the space for accommodating motor mount 303.

Referring to Figure 13 and Figure 14, swing arm includes that swing arm 5 is fixed on consolidating on bend pipe main shaft with being set with by keyway arrangements Fixed end 51 and arm body 50 for installing clamping driving mechanism 6 Yu clamping 13, clamping driving mechanism 6 include being installed in swing arm 5 Clamping servo motor 61 in the chamber 500 of arm body 50, wherein arm body 50 is swing arm, arranges and is located above arm body along X axis Screw body 62, the clamping seat 63 being installed on feed screw nut 621, and being arranged between screw rod 622 and clamping servo motor 61 And it is located at the reduction gearing mechanism 64 of the swing end side of swing arm 5；The armature spindle of clamping servo motor 61 is arranged along X axis；In figure X axis constitute clamping 13 in the present embodiment in the folding direction of clamping pipe process.

The son circle compatible sub-folder mould of mould 121,122,123 with different layers is removably installed on clamping seat 63 131,132,133, to constitute the clamping 13 in the present embodiment.Clamping seat 63 can by rolling guide 630 arranged along X axis It is slidably mounted on arm body.

In the present embodiment, screw body 62 uses planetary roller screw body, matchedly, reduction gearing mechanism 64 It is constructed using speed reducer 65 and the cooperation of vertical synchronous belt deceleration mechanism；Speed reducer 65 is mounted in the mounting hole of support base 67；It is perpendicular To the input belt wheel that synchronous belt deceleration mechanism includes on the output shaft for being coaxially installed in speed reducer 65 by keyway arrangements 661, the output pulley 662 being coaxially installed in by keyway arrangements on the rear end of screw rod 622, and it is synchronous with two belt wheels Engagement and vertically arranged synchronous belt；Input belt wheel 661 is small pulley, and output pulley 662 is big belt wheel；In the present embodiment In, speed reducer 65 is coaxial-type speed reducer, and the armature spindle of the input shaft and clamping servo motor 61 of speed reducer 65 is coaxially arranged, and It is sequentially connected by shaft coupling, i.e., the armature spindle of clamping servo motor 61 is sequentially connected by speed reducer 65 and input belt wheel 661. Upward in Z axis, screw rod front end is installed in rotation on clamping seat 63, and face is located on the first lateral face 6300 in its transverse direction Or top, the first lateral face 6300 are the cross of vertical installation site of three sub- clampings 131,132,133 on clamping seat 63 To middle face, it is preferably located on the first lateral face 6300, face was the transverse direction of center axis thereof in the transverse direction of screw rod front end Face, so that point of force application between screw rod and clamping seat 63 be made to ensure the clamping effect difference of each layer clamping not close to external force center In the case where more, reduce when clamping to torque caused by screw rod, improve the service life of screw rod；Screw rod rear end passes through fixed Support base 67 on the swinging end of swing arm 5 and be installed in rotation on arm body, i.e. the spring bearing of screw rod rear end is fixed In the axis hole of support base 67.

As shown in Figures 1 to 4, after finishing the installation, the auxiliary-push mechanism of guided mode unit 4 is surrounded with clamp system positioned at curved Angular evacuation channel 101 right above pipe motor 10, which upwardly extends most head space structure, is not only convenient for pacifying Dress and maintenance bend pipe motor 10, and it is trapped among bend pipe motor 10 within headstock 3 and guided mode unit 4, to optimize the entirety of head Structure.It is upward in Z axis in addition, as shown in figure 4, in overall structure, under the lower surface 3000 of headstock 3, arm body 50 The lower face 10000 of surface 5000 and the motor mounting plate 100 for installing bend pipe motor 10 substantially maintains an equal level, whole to optimize head The layout of body structure.

Specific bend pipe process is as follows:

First bend pipe step S1:(1) elbow radius of bend pipe structure is shaped according to needed for, select corresponding son circle mould with Sub-folder mould, such as selection circle mould 121 and sub-folder mould 131, (2) control vertical shift driving mechanism 21 drive base of the carrier head 3 along Z axis to shifting It is dynamic, until making the circle die cavity 1210 of son circle mould 121 and the axis substantially isometry position of feeding main shaft；(4) control unit changes the mold unit 2 On traversing driving device 25 drive headstock 3 to move along X axis, make the circle die cavity 1210 and feeding main shaft of son circle mould 121 Axis is substantially collinearly arranged；(5) pipe that feeding trolley driving is clamped in its feeding main shaft is moved to along Y-axis to bend pipe position It sets, clamping driving mechanism 6 drives sub-folder mould 131 and son circle mould 121 to clamp tube end, and control on guided mode unit 4 traversing watches The movement of motor 84 is taken, so that sub- guided mode 421 clamps pipe portion；(6) control bend pipe motor 10 drives bend pipe main shaft synchronously to drive circle While mould 12 acts together with clamping 13 and carries out bend pipe, auxiliary-push mechanism drives sub- guided mode 421 to carry out auxiliary push away.

Step S2 is changed the mold, selects the circle mould of another elbow radius, such as selection son circle mould 122 and sub-folder mould as needed 132, it horizontally keeps pipe fitting static with respect to rack, controls circle mould 12 and open with the opening of clamping 31 and sub- guided mode 421 to discharge Pipe fitting, and controlling mold changing unit driving headstock 3 makes round mould 12, clamping 13 first be moved to pipe disengaging circle die cavity along X axis 1210, then be substantially arranged at an equal altitude along Z axis to the axis of the circle die cavity and feeding main shaft that are moved to son circle mould 122 downward；Then, it controls Traversing driving device 22 processed drives base of the carrier head 3 to move along X axis, until making the circle die cavity of son circle mould 122 and the axis of feeding main shaft Substantially conllinear arrangement.That is, the mold changing unit 2 driven by servo motor is equipped between headstock 3 and rack, for passing through head Seat 3 is synchronously to drive clamping 13 to be done on X axis and Y-axis two-dimentional empty with the feeding main shaft of the opposite feeding trolley of circle mould 12 Between move.

Second bend pipe step S3, clamping driving mechanism 6 drives sub-folder mould 132 and son circle mould 122 to clamp tube end, and controls Traversing servo motor 84 on guided mode unit 4 acts, so that sub- guided mode 421 clamps pipe portion；Then, control bend pipe motor 10 drives While bend pipe main shaft synchronously drives round mould 12 to act together with clamping 13 and carry out bend pipe, auxiliary-push mechanism drives sub- guided mode 421 carry out auxiliary push away.

Embodiment 2

As the explanation to the utility model embodiment 2, only said below to the difference in above-described embodiment 1 It is bright.

Referring to Figure 15 to Figure 17, in the present embodiment, above-mentioned planetary roller screw body is substituted using ball wire rod mechanism, Construct clamping driving mechanism 6.Matchingly, reduction gearing mechanism uses gear train reduction gearbox 64, and support base is to be installed in pendulum Gearbox 640 on the swinging end of arm 5.

Clamping seat 63 includes the bottom plate 631 connected with the sliding block on rolling guide 630, is installed in bottom plate 631 adjacent to bend pipe Box portions 632 on the one end of main shaft, and it is installed in a side and and bottom plate of the box portions 632 away from bend pipe main shaft Triangle reinforcement floor portion 633 between 631 the other end；Clamping 13 is removably attached to box portions 632 adjacent to bend pipe On the end side of main shaft；The axial forward end of feed screw nut 621 is fixedly connected with box portions 632 away from the end side of bend pipe main shaft, axis It is located at the side that axial forward end deviates from box portions 632 to the back-end；It is fixed between the upper end and arm body 50 of Gearbox 640 There is oblique pull reinforcement floor 634；The spring bearing 624 being sleeved on screw rod rear end is arranged in reduction gearbox 64.Gear train is slowed down Case 64 is multi-stage speed-reducing gear set composition, and input gear axle 641 is passed by the armature spindle of shaft coupling and clamping servo motor 61 Dynamic connection, and coaxial arrangement；Output gear 642 is installed on the rear end of screw rod 622 with being set with by keyway arrangements.

In the present embodiment, the specially level Four gear reduction of gear train reduction gearbox 64, structure as shown in figure 17, Input gear axle 641, level-one transition gear axle 647, second level transition gear axle are rotatably mounted on Gearbox 640 645 and three-level transition gear axle 643, screw rod constitute its output gear shaft, covered on the rear end of screw rod by keyway arrangements Equipped with output gear 643；It is laid with the pinion gear engaged with output gear 642 in three-level transition gear axle 643 and passes through keyway Structure and be set with gear wheel 644, the pinion gear engaged with output gear 644 and logical is laid in second level transition gear axle 645 It crosses keyway arrangements and is set with gear wheel 646, the small tooth engaged with gear wheel 646 is laid in level-one transition gear axle 647 It takes turns and is set with gear wheel 648 by keyway arrangements, laying and 648 pinion mate of gear wheel in input gear axle 641, To constitute level Four deceleration mechanism.

Output gear 642, gear wheel 644, gear wheel 646 and gear wheel 648 are disk gear structure, and screw rod rear end is logical It crosses bearing gland 106, combination bearing 105, oil sealing 104 and round nut 103 and is rotatably supported on Gearbox 640； Three-level transition gear axle 643 passes through oil sealing 107, round nut 108, bearing 109, bearing mounting base 111, round nut 112, expansion sleeve 113, bearing 114 and bearing gland 115 and be rotatably supported on Gearbox 640；Second level transition gear axle 645 passes through Oil sealing 121, bearing 122, expansion sleeve 116, bearing 117, bearing mounting base 118, bearing 119 and bearing gland 120 and can be rotated Ground is mounted on Gearbox 640；Level-one transition gear axle 647 passes through bearing gland 123, bearing 124, bearing 126, bearing 130, bearing gland 131 and be rotatably supported on Gearbox 640, input gear axle 641 pass through bearing 125, bearing 127, bearing 128 and bearing gland 129 and be rotatably supported on Gearbox 640.

In addition, between adjacent two layers circle mould and between bottom circle mould and the fixing end of swing arm by being arranged along the horizontal Side keyway structure is fixedly connected, structure as shown in figure 16, between bottom circle mould 121 and the fixing end 51 of swing arm 5, with admittedly Fixed side keyway structure connecting the two includes the keyway 1210 being located on bottom circle mould 121 and the keyway being located in fixing end 51 5100。

In the above embodiments, the shaft axis that " coaxial " is configured as two rotating members is collinearly arranged.

In the above-described embodiments, in guided mode unit 4, in clamp system and auxiliary-push mechanism, in addition to being rolled using planet Except column screw body or ball wire rod mechanism and synchronous belt deceleration mechanism building driving mechanism, the driving mechanism of the two can also be adopted With structure identical with clamping driving mechanism, i.e., both screw body and reduction gearing mechanism, concretely by such as Figure 14 institute Constructed by the planet screw rod and synchronous belt deceleration mechanism shown, or to be slowed down by ball-screw and gearbox drive as shown in figure 16 Constructed by mechanism.Further for feeding trolley, axial actuating mechanism is to be constructed using straight-line displacement output device, specifically Linear motor, oil cylinder, cylinder isoline displacement output device can be used to be constructed, can also be used servo motor with for should The movement conversion mechanism that the output that is in line is converted in the rotation output of servo motor is constructed, for the specific of movement conversion mechanism Structure, that is, the gear and rack teeth mechanism that can be used in above-described embodiment are constructed, and screw body can also be used and constructed.

Claims (10)

1. a kind of improved CNC tube bending machine of structure, including rack and the head and feeding trolley that are mounted on the rack, institute Stating feeding trolley includes feeding main shaft；The head includes headstock, guided mode unit, the bend pipe electricity being mounted on the headstock Machine, bend pipe main shaft and bend pipe torque transmission mechanism, the circle mould being co-axially mounted on the bend pipe main shaft and swing arm, and be mounted on Clamping and clamping driving mechanism in the swing arm；It is characterized by:

The clamping driving mechanism includes the indoor clamping servo motor of arm body cavity for being installed in the swing arm, along the clamping Open and close direction arrangement and be located at arm body above screw body, the clamping seat being installed on feed screw nut, and be arranged in screw rod with The reduction gearing mechanism of swing end side between the clamping servo motor and positioned at the swing arm；The clamping servo motor turns Sub- axis is arranged along the folding direction；

In the transverse direction perpendicular to feeding main shaft axial direction, the bend pipe motor is installed in the head with deviateing the bend pipe main shaft On the end side of seat；In the axial direction, the bend pipe motor is located at the bend pipe main shaft adjacent to the side of the feeding trolley；

The guided mode unit includes cloth-guiding base, the guided mode being installed on the cloth-guiding base and the clamp system driven by servo motor With auxiliary-push mechanism, the auxiliary-push mechanism and the clamp system surround the evacuation channel right above the bend pipe motor.

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

The clamping seat is slidably mounted on the arm body by along the guide rail mechanism of folding direction arrangement；It is hanging down Directly on axial vertical of feeding main shaft, screw rod front end is installed in rotation on the clamping seat, and face position in its transverse direction In on the first lateral face or top in the first lateral face；Described first lateral face is positioned at the clamping in the clamping seat On vertical installation site middle position, and the plane being arranged along the horizontal；Screw rod rear end is by being installed in the swing arm Support base on swinging end and be installed in rotation on the arm body；The evacuation channel is angular evacuation channel；It is described to keep away Channel is allowed to upwardly extend most head space structure.

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

The screw body is planetary roller screw body；The reduction gearing mechanism includes vertical synchronous belt deceleration mechanism, institute Stating vertical synchronous belt deceleration mechanism includes the input belt wheel with the transmission connection of the armature spindle of the clamping servo motor, coaxially solid The output pulley being located on the screw rod rear end, and engage with two belt wheels and vertically arranged synchronous belt；

It is connected between the armature spindle of the clamping servo motor and the input belt wheel by speed reducer drive, the input belt wheel is same It is installed in axis on the output shaft of the speed reducer；The speed reducer be coaxial-type speed reducer, the coaxial-type speed reducer it is defeated The armature spindle for entering axis and the clamping servo motor is coaxially arranged.

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

The screw body is ball wire rod mechanism；The reduction gearing mechanism is gear train reduction gearbox, and the support base is solid The Gearbox being located on the swinging end；

The clamping seat includes the bottom plate connected with the sliding block on the guide rail mechanism, is installed in the bottom plate adjacent to the bend pipe Box portions on the one end of main shaft, and be installed in the box portions away from the bend pipe main shaft a side and with it is described Triangle reinforcement floor portion between the other end of bottom plate；It is neighbouring described that the clamping is removably attached to the box portions On the end side of bend pipe main shaft；The axial forward end of the feed screw nut and the box portions are solid away from the end side of the bend pipe main shaft Fixed connection, axial rearward end are located at the side that the axial forward end deviates from the box portions；The upper end of the Gearbox Oblique pull reinforcement floor is installed between the arm body；The spring bearing being sleeved on the screw rod rear end is arranged in described subtract In fast case；The guide rail mechanism is rolling guide.

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

Bend pipe torque transmission mechanism includes synchronous belt drive mechanism and gear train deceleration mechanism；Gear train deceleration mechanism Including input gear axle, output gear shaft and the more transition gear axles being installed in rotation on the headstock, and coaxially Ground is installed in the indoor gear of chamber on gear shaft and being located at the headstock；The synchronous belt drive mechanism include with it is described curved The input belt wheel of the armature spindle transmission connection of pipe motor, the output pulley being coaxially installed in the input gear axle, and with The synchronous belt of two belt wheels engagement；The output gear shaft constitutes the bend pipe main shaft；

Along the transmission direction of bend pipe torque, the axis of the input gear axle, the transition gear axle and the output gear shaft Parallel and non-coplanar arrangement；The stator of the bend pipe motor is higher than the lower surface of the headstock or holds with the lower surface Flat, the stator of the bend pipe motor is located at the top of the input belt wheel of synchronous belt drive mechanism and court away from the side of the input belt wheel To being disposed to extend.

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

The headstock includes an ontology and the spindle drum for being rotatably mounted the bend pipe main shaft；The spindle drum is from institute The lateral ends for stating an ontology, along described axial towards away from the direction of feeding trolley protrusion；The seat ontology with it is described Spindle drum constitutes L-type base structure together；Along the transmission direction, the input gear axle, the transition gear axle and described Output gear shaft to short leg is arranged to substantially L-type shape along the long corner of the L-type base structure；

The stator lower end of the bend pipe motor is mounted on the end side of another transverse end of the seat ontology by motor mounting plate, The lower face of the motor mounting plate is higher than the lower surface of the seat ontology or maintains an equal level with the lower surface, and input belt wheel is coaxially It is installed on the armature spindle；The lower end of the input gear axle stretches out the seat ontology and is located at the lower section of the seat ontology； Output pulley is installed on the lower end of the input gear axle, and is located at the lower section of the seat ontology.

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

The guided mode unit is located at the top of the lower surface of the headstock；Another lateral ends of the seat ontology, along described It is axial to be located at the bend pipe motor adjacent to the side of the bend pipe main shaft, along described laterally towards the direction far from the bend pipe main shaft Extend and is formed with motor mount；The upper surface of the motor mount, which is installed with, is located at the seat along the lateral arrangement On the upper surface of ontology, and the traversing guide rail mounting base being connected with the seat ontology；

The clamp system includes the cross slide way being fixed in the traversing guide rail mounting base, slidably by traversing sliding block Ground is mounted on the guided mode slide on the cross slide way, the traversing servo electricity being installed on the lower surface of the motor mount Machine, screw body, and the reduction gearing mechanism being arranged between screw rod and the traversing servo motor；The traversing servo motor Armature spindle is along the lateral arrangement, and the torque output shaft end of armature spindle is located at the side that its stator deviates from the bend pipe main shaft； The guided mode slide is fixedly connected with feed screw nut；The evacuation chamber for avoiding screw rod front end is equipped in the guided mode slide Room, screw rod rear end are installed in rotation on the seat by the support base on the outer end for being installed in the motor mount On ontology；It is higher than the lower surface of the seat ontology on the downside of the stator of the traversing servo motor；

The auxiliary-push mechanism includes the axial guidance being installed on the guided mode slide along the axial arrangement, is installed in described Auxiliary on guided mode slide pushes away servo motor, screw body, and is arranged in screw rod and the auxiliary deceleration transmission pushed away between servo motor Mechanism；The auxiliary armature spindle for pushing away servo motor is along the axial arrangement, and the torque output shaft end of armature spindle is located at its stator Away from the side of the bend pipe main shaft；The cloth-guiding base is slidably mounted on the axial guidance by sliding block, and with silk Stem nut is fixedly connected；

In the clamp system and/or the auxiliary-push mechanism, screw body and reduction gearing mechanism be planetary roller screw rod with Synchronous belt deceleration mechanism is ball-screw and gearbox drive deceleration mechanism or is ball-screw and synchronous belt deceleration mechanism.

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

It is axial perpendicular to feeding main shaft it is vertical on, the lower surface of the headstock, the lower surface of the arm body and for pacifying The lower face for filling the motor mounting plate of the bend pipe motor substantially maintains an equal level.

9. according to claim 1 to CNC tube bending machine described in any one of 4 claims, it is characterised in that:

Round mould centering installation axle, the upper end of the bend pipe main shaft and the round mould are installed on the upper end of the bend pipe main shaft In the lower end for installation axle of feeling relieved, for concave relief at there is the indent conical surface, another one is suitable with the indent conical surface in the end face of one The cone structure matched；Across the blind rivet of the interior axis hole of the bend pipe main shaft, with the screw thread being set in the round mould centering installation axle Hole removably cooperates, and the bend pipe main shaft and the round mould centering installation axle are tensed in the axial direction of the bend pipe main shaft.

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

For concave relief at there is the indent conical surface, the lower end of the round mould centering installation axle is described in the upper surface of the bend pipe main shaft Cone structure；

The round mould of multilayer difference elbow radius is sleeved on outside the round mould centering installation axle with stacked system, and fixed in circle mould It is compressed on the upper end of heart installation axle with fixing piece；It is removably installed on the clamping seat and different layers circle mould Xiang Shi The clamping matched；The fixed end cap of the swing arm is outer mounted in the bend pipe main shaft and passes through the axial cloth along the bend pipe main shaft The axis side switch slot structure set is fixedly connected, and is passed through between adjacent two layers circle mould and between bottom circle mould and the fixing end of the swing arm The side keyway structure being arranged along the horizontal is fixedly connected；

The mold changing unit driven by servo motor is installed, for passing through the headstock between the headstock and the rack The feeding main shaft for driving the clamping feeding trolley opposite with the round mould, perpendicular to feeding main shaft axial direction transverse direction with It is mobile synchronously to make two-dimensional space on vertical.