CN207872796U - A kind of feeding main shaft device, bending machine and feed collet mechanism - Google Patents

Abstract

The utility model is related to a kind of feeding main shaft device, bending machine and feed collet mechanisms, belong to pipe bending technique field.Feeding main shaft device includes clamping driver and feeding main shaft, feeding main shaft include live spindle, collet and pushing sleeve；Collet includes clamping return unit, the base of the carrier head being installed in live spindle and the activity material folding pawl being hinged to by the first hinged shaft on base of the carrier head；The reset force of clamping return unit forces activity material folding pawl to turn to the release location of workpiece from clamping workpiece position around the first hinged shaft；Pushing sleeve by clamping driver drivingly relative rotation main shaft and move back and forth, Compressive activities material folding pawl and force activity material folding pawl to overcome the reset force of clamping return unit to turn to clamping workpiece position from the release location of workpiece around the first hinged shaft, or extruding of the release to activity material folding pawl.It is improved by the structure to feeding main shaft, the stroke of its feed collet mechanism can be effectively improved, can be widely used in the manufacturing fields such as air-conditioning, automobile.

Description

A kind of feeding main shaft device, bending machine and feed collet mechanism

Technical field

Component the utility model is related to a kind of angle pipe equipment and for building the bending machine, specifically, being related to one kind The improved feeding main shaft device of structure and the bending machine built with the feeding main shaft device and the material for building the feeding main shaft Clamp mechanism.

Background technology

A kind of CNC tube bending machine is disclosed in the patent document that notification number is CN206316192U, it, should as shown in its attached drawing 1 CNC tube bending machine includes control unit 7, rack 1 and the feeding trolley in the rack 1 and bend pipe head, feeding trolley packet Feed arrangement 2 and feeding main shaft device 3 are included, bend pipe head includes nose assembly 4, changes the mold component 5 and lean on membrane module 6.

As shown in the attached drawing 2 of the patent document, feeder assembly 2 includes the feeding guide 8 being installed in rack 1 and feeding tooth Item 23, the slide unit 21 being slidably mounted on feeding guide 8 are installed on slide unit 21 and are installed on armature spindle and feeding tooth The servo motor 22 of 23 matched feeding gear of item, and be installed in rack 1 for the moveable position range to slide unit 21 The locating piece mechanism 24 positioned；To transfer to drive Europe slide unit on feeding guide 8 by the positive and negative of servo motor 22 It reciprocatingly slides, i.e., servo motor 22, feeding rack 23 and feeding gear constitute feeding driver together, and slide unit is mounted on driving Feeding main shaft device 3 on 21 is back and forth transferred on feed direction.

As shown in the attached drawing 3 of the patent document, feeding main shaft device 3 includes that fixed material folding pawl 33 is equipped on front end Feeding main shaft 32, the servo motor 31 for driving feeding main shaft 32 to be rotated around own rotation axis line, and for driving geometrical clamp Expect the material folding cylinder 34 of the clamping of pawl 33 or release workpiece.

Wherein, feeding main shaft 32 includes live spindle and is set in outside live spindle and with live spindle by servo motor 31 In the background technology of the patent document of the pushing sleeve for driving and rotating synchronously, front end structure such as Publication No. CN104552076A Shown in disclosed clamp system structure, as shown in the attached drawing 1 of the patent document comprising fix material folding pawl 20 and be set in solid Clamp material pawl 20 is outer and is the pushing sleeve 10 of tubular structure；Wherein, the tube end of live spindle is by being cut by fixed material folding pawl 20 It is cut into the elastic canister portion structure of multi-clove type, and the fixed feed collet for clamping workpiece in elastic canister portion structure, pushing sleeve 10 is by pressing from both sides Material cylinder drives and is moved back and forth along the rotation axis for being parallel to feeding main shaft, to pass through the extruding to elastic canister portion structure inwardly Power and force elastic canister portion structure inwardly to squeeze and workpiece is clamped, at this point, fixed material folding pawl is in clamping workpiece position； When pushing sleeve is moved to extruding of the release to elastic canister portion structure backward, effect of the elastic canister portion structure in natural resiliency restoring force It is reset to down to discharging workpiece, at this point, fixed material folding pawl is in the release location of workpiece.In order to improve feeding main shaft to workpiece into The mechanical strength of row clamping, cannot be too deep to feeding main shaft cutting, and to obtain with single-lobe elasticity canister portion structure with more preferable Elasticity, usually to cut into the structure of three valves or more, majority is 4 valves to 6 valve structures, it is caused to fix opening for material folding pawl Stroke is less than normal and less than normal to the accommodation of pipe fitting diameter, and is carried out repeatedly to elastic canister portion structure with increasing for clamping times Bending and generate bending fatigue or bending memory and reduce to the clamp precision of workpiece.

In addition, the bending machine during carrying out bend pipe processing to workpiece, is the front end face using fixed material folding pawl As the positioning datum by folder work pieces process, when using three valves or the above structure of pintongs due to it, when clamping due to each valve bullet Property deformation have differences and entire front end face made to be difficult alignment, cause to generate deviation to the positioning datums of different workpieces, to make The consistency of the same batch work-piece processed is poor, and as the work times of fixed material folding pawl increase and deviation bigger.

Utility model content

The main purpose of the utility model is to provide a kind of improved feeding main shaft device of structure, to improve the feeding main shaft Device can feeding workpiece radial dimension range；The another object of the utility model, which is to provide, a kind of effectively improving it to workpiece The feeding main shaft device of positioning accuracy；The another object of the utility model is to provide more than one and states feeding main shaft device structure Bending machine；A further object of the utility model is to provide a kind of feed collet mechanism for building above-mentioned feeding main shaft device.

In order to realize that above-mentioned main purpose, feeding main shaft device provided by the utility model include mounting base and be mounted on this Clamping driver in mounting base and the feeding main shaft that can be rotatably mounted at around own rotation axis line in the mounting base, feeding master Axis includes live spindle, the collet being installed on the front end of live spindle and the pushing sleeve being mutually arranged with live spindle；Collet includes Return unit, the base of the carrier head being installed in live spindle and the activity material folding pawl being hinged to by the first hinged shaft on base of the carrier head is clamped, Activity material folding pawl around the first hinged shaft can clamping workpiece position and release the location of workpiece between reciprocating rotation；The reset of return unit is clamped Power forces activity material folding pawl to turn to the release location of workpiece from clamping workpiece position around the first hinged shaft；Pushing sleeve is by clamping driver driving Ground relative rotation main shaft can be moved back and forth along the direction of parallel aforementioned rotation axis, Compressive activities material folding pawl and force activity material folding Pawl overcomes the reset force of clamping return unit to turn to clamping workpiece position, or release to work from the release location of workpiece around the first hinged shaft The extruding of dynamic material folding pawl.

By by least partly material folding pawl is arranged to be hinged to the front end of live spindle by hinged shaft on feeding main shaft device On activity material folding pawl, be integrated in the prior art with live spindle or fixed elastic canister portion structure with substituting, can not only It effectively improves the opposite of feed collet mechanism and opens stroke to match the workpiece of bigger radial dimension range, and can avoid due to multiple The problem of clamp precision produced by clamping workpiece reduces.In addition, the quantity of its activity material folding pawl can be set to two or three with On, it is not limited to three-clove style structure in the prior art, the design freedom with bigger.

Specific this programme is that base of the carrier head includes with the central through hole arranged along the direction of parallel aforementioned rotation axis Cylindrical body, and the hinged ear mount that is formed from the front end face of cylindrical body along the direction evagination of parallel aforementioned rotation axis, it is hinged Ear mount is equipped with and the matched hinge axis hole of the first hinged shaft；Pass through the company of the first stud connection between activity material folding pawl and hinged ear mount Binding structure is V shape joint structure.Processing convenient for base of the carrier head and the installation activity material folding pawl on the base of the carrier head.

More specific scheme is that activity material folding pawl includes the clamping jaw matrix hinged with base of the carrier head and is removably mounted on folder Feed collet on pawl matrix；Pushing sleeve is sleeved on outside live spindle；Clamping jaw matrix is the cone cylinder portion knot that cross section central angle is less than 180 degree Structure, the outer barrel face of cone cylinder portion structure constitute the compression taper surface with pushing sleeve phase extrusion fit；Hinged ear mount is equipped with along direction cloth The screw hole set and be connected to hinged shaft mounting hole, with the matched holding screw of screw hole for fixing the first hinged shaft.Material folding pawl is set It sets by clamping jaw matrix and the feed collet being removably mounted on the clamping jaw matrix, can be adapted to by replacing feed collet of different shapes The workpiece of workpiece or more size.Fixing mode between pushing sleeve and live spindle is configured to pushing sleeve to be set in outside live spindle, It is larger so as to which the accommodating chamber in base of the carrier head to be arranged to make the face that is squeezed of base of the carrier head for inclined external conical-tube face outwardly And the workpiece of larger diameter range can be matched.Hinged shaft is fixed by holding screw, with the welding technique scheme in routine It compares, is not only convenient for carrying out dismounting and change to activity material folding pawl, and will not be to clamping jaw seat and activity material folding pawl in disassembly process It damages.

Preferred scheme is that clamping return unit uses compressed spring, and one end of compressed spring is pressed on base of the carrier head, another End is pressed on the tail end of activity material folding pawl；In projection on the cross section perpendicular to rotation axis, tail end by pressure section Projection deviate the projection of corresponding first hinged shaft towards the direction for being directed toward another rotation axis.It is not only convenient for clamping return unit and periphery Assembling between component, and can provide and preferably reset torque.

Preferred scheme is that base of the carrier head is equipped with the spring mounting hole along the direction arrangement for being parallel to aforementioned rotation axis, Compressed spring is sleeved in spring mounting hole, and one end is pressed on the bottom surface of spring mounting hole, and the other end compresses the end of tail end On face；The quantity of activity material folding pawl is two, the parallel arrangement of two first hinged shafts；In same material folding pawl, before being parallel to The direction of rotation axis is stated, the end that tail end is located at an axial end side of the first hinged shaft is short end portion, is located at the another of the first hinged shaft The end of one axial end side is long end；The long end portion of two activity material folding pawls not Wei Yu the first hinged shaft an axial end Side, the direction bending of the long end of an activity material folding pawl towards the short end portion for being directed toward another activity material folding pawl extend to form by Splenium is to be arranged towards the direction far from the first hinged shaft by both ends of the surface of the pressure section on the direction for being parallel to aforementioned rotation axis Inclined-plane, compressed spring is pressed on the outer tail end by pressure section.Based on the design structure of aforementioned active material folding pawl, providing While larger reseting torque, it is effectively prevented from two activity material folding pawls and generates asking for tail end interference in synchronous opening process Topic.

Another preferred scheme is equipped between pushing sleeve and live spindle along the direction arrangement for being parallel to aforementioned rotation axis Guiding bond structure；The lateral surface of the rear end of pushing sleeve is equipped with the annular groove for revolving around it axis arrangement, and driver is clamped Including the connecting rod base in fixed mounting base, fixing end is by the second hinged shaft and the hinged push-and-pull connecting rod of connecting rod base, for pushing away The swinging driver for drawing connecting rod to be swung around the second hinged shaft, and can be rollably installed on push-and-pull connecting rod along the trough wall surface of annular groove Idler wheel.

In order to realize that above-mentioned another object, another preferred embodiment provided by the utility model are that pushing sleeve is sleeved on rotation master Outside axis；Material folding pawl on collet is activity material folding pawl, and the quantity of activity material folding pawl is two or more；It is equipped in mounting base For driving feeding main shaft to rotate the rotary index device of predetermined angular；The side wall of pushing sleeve is equipped with the first through hole, on collet Equipped with clamping workpiece state with release work status when can at least partly be docked with the first through hole to constitute placed channel The second through hole, the inner port of placed channel is located in the cavity wall of the workpiece accommodating chamber of feeding main shaft；It is installed in mounting base Workpiece locating mechanism, workpiece locating mechanism includes operating-controlling mechanism and the positioning on the displacement output end of the operating-controlling mechanism Component；It passes through to the manipulated mechanism controls of positioning component placed channel and enters in workpiece accommodating chamber whether to detect workpiece end Precalculated position is extended to, or sequentially exits workpiece accommodating chamber and placed channel.In the structure of existing feeding main shaft device, before adding The workpiece positioning of structure is stated, can effectively be provided for bend pipe workpiece consistent while being accurately positioned benchmark, solves existing skill The problem of can not carrying out cloth signal wire to orientation detection sensors in art.

Further embodiment is that operating-controlling mechanism includes the swing connecting bar that fixing end is hinged on by third hinged shaft in mounting base, And the swinging driver for driving swing connecting bar to be swung within the scope of predetermined pivot angle around third hinged shaft；The swinging end of swing connecting bar Constitute displacement output end.Effectively simplify the structure of operating-controlling mechanism.

Further embodiment includes the position block being hinged to by the 4th hinged shaft on displacement output end for positioning component, and For coordinating to detect whether workpiece end pushes position block to the sensor in precalculated position with positioning end；Positioning end is Position block stretches into the end in workpiece accommodating chamber in positioning.

Wherein, positioning end is stretched into workpiece accommodating chamber, and when position block is pushed by workpiece to precalculated position, positioning gear Block leans with the positioning stop surface on displacement output end, and positions end and can be put towards the direction far from mounting base around the second hinged shaft It is dynamic, and position the lean normal direction relative rotation axis of end side surface of positioning of end and workpiece and be downwardly inclined arrangement；Or, positioning end Portion stretches into workpiece accommodating chamber, and when position block is pushed by workpiece to precalculated position, and position block is exported with mounted on displacement Controlled collapse formula positioning block piece on end leans positioning.

Further scheme is equipped between position block and displacement output end swings return unit, swings the reset of return unit Power forces position block to stretch into the end in workpiece accommodating chamber and is swung towards the direction far from mounting base around the 4th hinged shaft.

In order to realize that above-mentioned another object, bending machine provided by the utility model include control unit, rack and be mounted on Feeding trolley in rack and bend pipe head；Feeding trolley includes feeding guide, is slidably mounted on the feeding guide The feeding driver that slide unit, the feeding main shaft device on the slide unit and driving slide unit reciprocatingly slide along feeding guide, send Expect that main shaft device is feeding main shaft device described in any of the above-described technical solution.

Based on the feeding bending machine of above-mentioned feeding main shaft device structure, it is radial dimension of suitable that piece-holder can be effectively improved While with range, the precision of workpiece bend pipe processing is improved.

In order to realize that above-mentioned a further object, feed collet mechanism provided by the utility model include collet and pushing cylinder, pushing cylinder can edge Itself axial reciprocating is movably mutually set with collet；Collet includes clamping return unit, base of the carrier head and is hinged to by hinged shaft described Activity material folding pawl on base of the carrier head, activity material folding pawl around hinged shaft can clamping workpiece position and release the location of workpiece between reciprocating rotary It is dynamic；The reset force of clamping return unit forces activity material folding pawl to turn to the release location of workpiece from clamping workpiece position around hinged shaft；Pushing cylinder Move back and forth in an axial direction, Compressive activities material folding pawl and force activity material folding pawl overcome reset force with around hinged shaft from release the location of workpiece Clamping workpiece position is turned to, or discharges the extruding to activity material folding pawl.

Due to being at least partially arranged to activity material folding pawl in the material folding pawl by the feed collet mechanism, compared in the prior art, While the opposite workpiece for opening stroke to match bigger radial dimension range of material folding pawl can not only be effectively improved, it can avoid The problem of being reduced due to clamp precision produced by multiple clamping workpiece.

Specific scheme is that pushing cylinder is sleeved on outside collet；Material folding pawl on collet is activity material folding pawl, and activity material folding The quantity of pawl is two or more；Base of the carrier head includes having the cylindrical body of axially disposed central through hole and from cylindrical body The front end face hinged ear mount that evagination is formed in an axial direction, hinged ear mount are equipped with and the matched hinge axis hole of hinged shaft, activity material folding pawl Between hinged ear mount by the connection structure of stud connection be V shape joint structure；Hinged ear mount is equipped with axial arranged along pushing cylinder And the screw hole being connected to hinge axis hole, with the matched holding screw of screw hole for fixing hinged shaft；Activity material folding pawl includes and collet The hinged clamping jaw matrix of seat and the feed collet being removably mounted on the clamping jaw matrix；It is equipped with along pushing cylinder axis between pushing cylinder and base of the carrier head To the guiding bond structure of arrangement.Processing convenient for base of the carrier head and the installation activity material folding pawl on the base of the carrier head.

Description of the drawings

Fig. 1 is the front view of feeding main shaft device in the utility model bending machine embodiment 1；

Fig. 2 is the upward view of feeding main shaft device shown in Fig. 1；

Fig. 3 is the A partial enlarged views of Fig. 1；

Fig. 4 is the B partial enlarged views of Fig. 2；

Fig. 5 is stereogram of the collet after omitting feed collet in the utility model bending machine embodiment 1；

Fig. 6 is front view of the collet after omitting feed collet in the utility model bending machine embodiment 1；

Fig. 7 is the left view of structure shown in fig. 6；

Fig. 8 be the utility model bending machine embodiment 1 in collet along A1-A1 shown in Fig. 7 to axial sectional view；

Fig. 9 is C partial enlarged views in Fig. 8；

Figure 10 is the upward view of structure shown in fig. 6；

Figure 11 is the left view of structure shown in Figure 10；

Figure 12 be the utility model bending machine embodiment 1 in collet along A2-A2 shown in Figure 11 to axial sectional view；

Figure 13 is pushing sleeve cylinder and to omit the front view of collet after feed collet in the utility model bending machine embodiment 1；

Figure 14 is the axial sectional view of structure shown in Figure 13；

Figure 15 is the D partial enlarged views of Figure 14；

Figure 16 is that the collet in the release location of workpiece in the utility model bending machine embodiment 1 is vertical after omitting feed collet Body figure；

Figure 17 is the front view of the collet in the release location of workpiece in the utility model bending machine embodiment 1；

Figure 18 is the E partial enlarged views of Figure 17；

Figure 19 is upward view of the collet after omitting feed collet shown in Figure 17；

Figure 20 is the F partial enlarged views of Figure 19；

Figure 21 is that pushing sleeve cylinder is omitting material with the collet in the release location of workpiece in the utility model bending machine embodiment 1 Front view after folder；

Figure 22 is the axial sectional view of structure shown in Figure 21；

Figure 23 is the G partial enlarged views of Figure 22；

Figure 24 is the stereogram of feeding main shaft device in the utility model bending machine embodiment 2；

Figure 25 is the stereogram of the front end partial structurtes of feeding main shaft in the utility model bending machine embodiment 2；

Figure 26 is the stereogram of workpiece locating mechanism in the utility model bending machine embodiment 2；

Figure 27 is front view of the workpiece locating mechanism under non-locating state in the utility model bending machine embodiment 2；

Figure 28 is that feeding main shaft device is in non-locating shape in workpiece locating mechanism in the utility model bending machine embodiment 2 Front view when state；

Figure 29 is the H partial enlarged views of Figure 26；

Figure 30 is the K partial enlarged views of Figure 27；

Figure 31 is that feeding main shaft device is in positioning states in workpiece locating mechanism in the utility model bending machine embodiment 2 When front view；

Figure 32 is that feeding main shaft device is first in carrying out position fixing process to workpiece in the utility model bending machine embodiment 2 The state diagram of beginning state；

Figure 33 is that feeding main shaft device is complete in carrying out position fixing process to workpiece in the utility model bending machine embodiment 2 At the state diagram of state.

Specific implementation mode

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

The utility model is mainly improved the structure of feeding main shaft device on bending machine, in raising activity material folding The clamping stroke of pawl and obtain bigger workpiece radial dimension matching range, in the following embodiments, mainly to feeding main shaft device Structure illustrate, the design of the structural reference existing products of other functional units of feeding trolley and bending machine, than If the notification number applied before the applicant is CN206316192U or Publication No. CN107282720A and CN107202157A Patent application.

Bending machine embodiment 1

The utility model bending machine includes control unit, rack and bend pipe head and feeding trolley in the rack, Feeding trolley by control unit control carries out feeding feeding and according to setting tarnsition velocity according to setting speed to bend pipe head Workpiece is driven to rotate predetermined angular, the workpiece fed to feeding trolley to the controlled unit control processed of bend pipe head around rotation axis Bend pipe processing is carried out according to presupposed solution.

Control unit includes processor, memory and touch screen, and memory is stored with computer program, and processor receives behaviour Make operational order of the personnel by touch screen input, corresponding program is transferred from memory and execute the computer program, with reality While now by step controlling feeding trolley progress feeding, control bend pipe head carries out bend pipe processing to pipe fitting.

Feeding trolley includes the feeding guide being fixed on the rack, the slide unit being slidably mounted on feeding guide, peace Feeding main shaft device on slide unit, and push slide unit and the feeding that drives feeding main shaft device to be moved back and forth along feeding guide Driver.Feeding driver includes the feeding rack arranged along feeding guide length direction, and armature spindle is equipped with and feeding rack The feeding servo motor of matched gear, and it is installed in travel switch of the rack for being controlled slide unit stroke, these Travel switch is arranged on different trips node location, and the state whether to move to the position to slide unit is monitored.

Referring to Fig. 1 to Fig. 4, the utility model feeding main shaft device 1 includes for whole device to be mounted on feeding trolley Slide unit on mounting base 10 and clamping driver 2, feeding main shaft 3 and rotating driver in the mounting base.At this In embodiment, rotating driver includes the synchronizing wheel 11 being connect with servo motor transmission by synchronous belt, which passes through Synchronous wheel drive feeding main shaft 3 rotates predetermined angular around rotation axis 300, then drives the workpiece being clamped in feeding main shaft 3 It is rotated around rotation axis 300.In described below, feed direction will be referred to as along the direction for being parallel to rotation axis 300.

Feeding main shaft 3 is installed in rotation in mounting base 10, including live spindle 31, is sleeved on outside live spindle 31 Pushing sleeve 32 and the collet 30 for being installed on the front end of live spindle 31 and being used for clamping workpiece；In the present embodiment, live spindle 31 be tubular structure, and collet 30 has a through-hole structure docked with the endoporus of live spindle 31, through-hole structure and live spindle Endoporus constitutes bend pipe plug channel together；Pushing sleeve 32 is including connecting tube 33 and is installed in pushing sleeve cylinder 34 on the front end of connecting tube 33, Connecting tube 33 can be structure as a whole with pushing sleeve cylinder 34, can also be fixed pushing sleeve cylinder 34 by non-removable attachments such as welding In connecting tube 33, also pushing sleeve cylinder can be fixed on connecting tube 33 by dismountable attachment such as fixed pin, fixing bolt On；It is Detachable connection structure in the present embodiment, while being convenient for the processing of the two, convenient for the replacement to pushing sleeve cylinder 34, guarantor It supports and repair is equipped with the interior shoulder for socket-connecting with the front end of connecting tube 33 on the rear port of pushing sleeve cylinder 34 as shown in figure 14 Platform structure, with the positioning to the two in axial direction when assembled and radially.For the company between collet 30 and live spindle 31 Relationship is connect, the two may be either integral structure or detachable or non-removable more attachment structures；In the present embodiment, Using dismountable connection structure, while in order to process, convenient for collet 30 is replaced, maintained and is repaired, and such as Fig. 8 Shown, the inner cavity 400 of port is for being sleeved on outside live spindle 31 thereafter, and in inner cavity 400 machine-shaping be useful for against The inner shoulder table structure of 300 end face of live spindle, in order to positioning when assembled.

The connecting rod base 21 that driver 2 includes U structures, push-and-pull connecting rod 23, cylinder 24, articulated joint 25 and two needle roller axis are clamped Hold 28；The fixing end of push-and-pull connecting rod 23 is installed in rotation on by two second hinged shafts 27 on two yokes of connecting rod base 27, is put Moved end is hinged with articulated joint 25, and articulated joint 25 is fixedly connected with the piston rod of cylinder 24, and the hinged shaft in articulated joint 25 and piston Spacing between rod end surface is adjustable, is adjusted with the stroke range to feeding main shaft 3.Outer surface in the rear end of connecting tube 33 It is equipped with the annular groove 35 arranged around the rotation axis 300 of feeding main shaft 3, the outer ring of two needle bearings 28 can be along annular The trough wall surface of groove 35 is rollably placed in annular groove 35, drives swing connecting bar 21 to be swung around the second hinged shaft 27 by cylinder 24 During, also push pushing sleeve 32 is opposite to revolve therewith swinging by the needle bearing that fixing axle 26 is fixed in swing connecting bar 21 Turn main shaft 31 to move back and forth along feed direction, simultaneously because the cooperation of needle bearing 28 and annular groove 35 and make pushing sleeve 32 around rotation During shaft axis rotates, needle bearing 28 will not rotate it generation interference.Cylinder 24 is constituted to be used in the present embodiment Oil cylinder, straight also can be selected in the swinging driver that is swung within the scope of predetermined pivot angle around the second hinged shaft 27 of driving swing connecting bar 23 Other straight-line displacement output devices such as line motor substitute cylinder 24 and carry out wobble drive, at this point, straight-line displacement output device is determined Son is hinged by hinged shaft and mounting base 10, and mover is hinged by the swinging end of articulated joint 25 and swing connecting bar 23.Needle bearing 28 The idler wheel that the trough wall surface in the present embodiment along annular groove 35 rolls is constituted, i.e., in rolling process, the wheel face and annular of idler wheel are recessed Two trough wall surfaces of slot 35 are in contact or contact and be formed with another one the tolerance gap of very little with one.

Referring to Fig. 5 to Figure 23, collet 30 includes 4, two activity material folding pawls of base of the carrier head, two compressed springs 61 and two pieces the One hinged shaft 62, base of the carrier head 4 include that cylindrical body 40 and two front end faces from the cylindrical body 40 are formed along feed direction evagination Hinged ear mount 41, cylindrical body 40 has the central through hole 400 along feed direction, and cylindrical body 40 is removably attached to revolve On the front end for turning main shaft 31, inner shoulder table is equipped at the rear port 400 of cylindrical body 40, for being sleeved on by live spindle 31 It is positioned when on the front end of live spindle 31, hinged ear mount 41 is equipped with hinge axis hole 410.

Activity material folding pawl 5 includes clamping jaw matrix 5 and the feed collet 54 being removably installed on the front end of clamping jaw matrix 5, The radial dimension of workpiece of difference can be clampeds by replacing the feed collet 54 of different size, and feed collet 54 can be arranged to such as Fig. 8 and Throat structure shown in Figure 12, the i.e. Clip cavity of feed collet 54 radially size be less than clamping jaw matrix 5 workpiece accommodating chamber 500, so as to be clamped with the workpiece of outer shoulder or flange arrangement；Clamping jaw matrix 5 is the cone that cross section central angle is slightly less than 180 degree Canister portion structure, for being fixedly connected with feed collet 54, rear end face has been recessed matched U-shaped with hinged ear mount 41 for front end Yoke structure, i.e. yoke 52 and yoke 53, be equipped on two yokes shaft through hole 5200 corresponding with hinge axis hole 410, 5300, a shaft through hole 5200, hinge axis hole 410 and another shaft through hole 5300 are sequentially passed through by the first hinged shaft 62, from And the V shape joint structure for the connection that both makes to be hinged is constructed between clamping jaw matrix 5 and base of the carrier head 4；Wherein, hinged Ear mount 41 constitutes the monaural piece in the V shape joint structure, and two yokes 52,53 constitute the ears piece in the V shape joint structure；When So, ears piece can be set on base of the carrier head 4 and monaural piece is set on clamping jaw matrix 50 to be combined into V shape joint structure；This Outside, the bilateral auricle quantity in V shape joint structure does not limit to aforementioned cited a piece of and two chip architectures, can be according to structure Size needs and is arranged bilateral to be the more auricle structures of two panels or more with design.

As shown in Fig. 9 and Figure 23, it is equipped in the front end face of hinged ear mount 41 and arranges along feed direction and connect with hinge axis hole 410 Logical screw hole 402, with the installation position by the first hinged shaft of holding screw pair 62 coordinated with the screw hole 402 in hinge axis hole 410 It sets and is positioned and fixed.It of courses, other modes can also be used and positioned and fixed, such as directly will be in the first hinged shaft 62 The welding of one or both ends and yoke, glue sticking fixes.

Two spring mounting holes 403 arranged along feed direction are processed on the front end face of cylindrical body 40.Passing through will Compressed spring 61 is sleeved on the spring and installs in 403 holes, and one end of compressed spring 61 is made to be pressed on the bottom of spring mounting hole 403 On face, and the other end is pressed on the tail end end face of clamping jaw matrix 5, so that the first hinged shaft of elastic restoring force pair of compressed spring 61 62, which form one, forces the torque that clamping jaw matrix 5 is rotated around the first hinged shaft；As shown in figure 18, in the cross perpendicular to rotation axis 300 In projection on section 3000, the breech face of lower clamping jaw matrix 5 is lived upward by projection of the pressure section on the cross section 3000 The projection of lower first hinged shaft 62 is deviateed in the direction of dynamic material folding pawl 5, to make compressed spring 61 to approximate produced by lower clamping jaw matrix Make lower clamping jaw matrix 5 around the first hinged shaft 62 towards side counterclockwise along relatively lower first hinged shaft 62 formation of the restoring force of feed direction arrangement To the torque of rotation, i.e. compressed spring 61 forces activity material folding pawl around the first hinged shaft 62 with respect to torque caused by the first hinged shaft 62 It is turned to from the clamping workpiece position as shown in Fig. 5,13 and discharges the location of workpiece as shown in Figure 17,21.I.e. compressed spring 61 is constituted Clamping return unit in the present embodiment, the reset force of the return unit force activity material folding pawl around the first hinged shaft 62 from as shown in Figure 5 Clamping workpiece position turn to the release location of workpiece as shown in figure 17；As shown in FIG. 22 and 23, and the pushing sleeve retreated is utilized The front end face of cylinder 34 to the abutment action of clamping jaw matrix 5 and activity material folding pawl will not continue to rotate around the first hinged shaft 62, that is, retreat Pushing sleeve cylinder 34 end face constitute by activity material folding pawl limit release the location of workpiece at positive stops；It of courses, can lead to Cross be arranged on clamping jaw seat 4 limit stops block with backstop activity material folding pawl in return unit reset force under the action of be rotated further and open Open bigger.For return unit is clamped, structure type is not limited to the structure of aforementioned compression spring 61, torsional spring structure also can be used At clamping return unit, wherein the spring coil of the torsional spring is set on the first hinged shaft 62, and a torque arm is supported against base of the carrier head 4, another torque arm By clamping jaw matrix 5；Two homopolarities magnet piece positioned opposite also can be used and substitute compressed spring composition clamping return unit, wherein one A magnet piece is fixed on base of the carrier head 4, and another magnet piece is fixed on activity material folding pawl 5；Extension spring composition yet can be used Return unit is clamped, i.e., pulls the outside portion of 5 tail end of clamping jaw matrix with it and it is made to be rotated around the first hinged shaft 62.

In the present embodiment, the quantity of activity material folding pawl is set as two, is convenient for each zero with simplifying overall structure Part is laid out and installs, and the quantity for not representing the activity material folding pawl in the utility model is limited to two, can also be three More than a.For only there are two the layouts of activity material folding pawl, two first hinged shaft, 62 parallel arrangements, further structure is two 62 relative rotation axis 300 of the first hinged shaft of root is centrosymmetrically arranged, and about two pairs that are mutually orthogonal and crossing rotation axis 300 Title face is arranged symmetrically；As shown in Fig. 6, Figure 10, Figure 18 and Figure 20, for same clamping jaw matrix 5, tail end, i.e. yoke 52,53 Outer end, along feed direction, yoke 52 is long end, and yoke 53 is short end portion with respect to yoke 52, i.e. clamping jaw matrix 5 The end that tail end is located at an axial end side of the first hinged shaft 62 is short end portion, and positioned at another axial end side of the first hinged shaft 62 End is long end.For two clamping jaw matrixes 5, the same axial end side that the two is located at the first hinged shaft 62 is that length is different Tail end, i.e., one is yoke 52 and another one is yoke 53, i.e., the long end portions of two clamping jaw matrixes Wei Yu not the first hinge In one axial end side of axis 62.As shown in figure 18, fork of 52 tail end of yoke of lower clamping jaw matrix 5 towards upper gripper jaw matrix 5 Arm 53 is bent to form by pressure section, and this is towards far under in the both ends of the surface 521,522 of feed direction both sides by pressure section The direction of first hinged shaft 62 is in tilted layout；The tail end of yoke 53 and the tail end of yoke 52 are in two activity material folding pawls from clamping work Part position turns to the process of the release location of workpiece, has gap between the two；The long end of i.e. one activity material folding pawl is towards separately The short end portion bending of one activity material folding pawl is extended to form by pressure section, and is by both ends of the surface of the pressure section on feed direction The inclined-plane arranged towards the direction far from the first hinged shaft 62, compressed spring 61 is pressed on the outer tail end by pressure section, and is located at Long end on the coaxial side of first hinged shaft 62 turns to release in two activity material folding pawls with short end portion from clamping workpiece position There is gap during the location of workpiece, to avoid generating interference on tail end.

As shown in Figure 14, Figure 21, Figure 22 and Figure 23, pushing sleeve cylinder 34 is set in the cylinder base portion except base of the carrier head 4 including main body 341 and the expansion canister portion 342 that is set in except two clamping jaw matrixes 5, the diameter of bore of expansion canister portion 342 be more than cylinder base portion 341 Diameter of bore, with the taper outer barrel face of matching jaw matrix 5.

Feeding main shaft 3 rotates under the driving of rotating driver around rotation axis 300, i.e., live spindle 31 and pushing sleeve 32 around Rotation axis 300 is rotated synchronously in a manner of constant angular velocity, in the present embodiment, by being set to live spindle 31 and pushing sleeve 32 Between guiding bond structure realized that is, the guiding bond structure is both between the two on being parallel to 300 direction of rotation axis While relative movement is oriented to, also force the two in the synchronous rotation that the rotation around rotation axis 300 is isogonism speed；Such as figure Shown in 22 and Figure 23, it includes one or more keyway 405 being located on 40 outer side surface of cylindrical body of base of the carrier head 4 to be oriented to bond structure, The slide key 404 being slidably positioned in the keyway 405 is equipped with countersunk head on cylinder base portion 341 at position corresponding with keyway 405 Hole 340, a sunk screw 343 are fixedly connected after passing through the counterbore hole 340 with slide key 404, to which slide key 404 to be fixed on On 34 internal face of pushing sleeve cylinder, while convenient for carrying out assembly and disassembly to pushing sleeve cylinder 34 and base of the carrier head 4.It of courses, it can be by being set to Waist round hole on pushing sleeve cylinder 34 with across the waist round hole and with base of the carrier head 4 be removably secured the holding screw connecting match with Reach the function of guide key groove, wherein the long axis of waist round hole is arranged along feed direction.

In the course of work, under the control of the control unit, i.e., processor executes the computer program being stored in memory To realize following steps：

（1）Clamping driver 2 pulls pushing sleeve cylinder 34 to be moved along feed direction rearward end by connecting tube 33, that is, drives pushing sleeve 32 move towards close to the direction of mounting base 10, to make the relative position between collet 30 and pushing sleeve cylinder 34, by as shown in fig. 13 that Position becomes position as shown in figure 21；Two activity material folding pawls are being pressed from both sides due to losing 34 pairs of their extruding forces of pushing sleeve cylinder Under the action of holding return unit reset force, feed collet 54 is forced to be rotated outwardly around the first hinged shaft 62, i.e., from such as Figure 13 and folder shown in fig. 5 It holds the location of workpiece and turns to and discharge the location of workpiece as shown in Figure 21 and Figure 17.

（2）When there is workpiece to stretch into workpiece accommodating chamber 500, clamping driver 2 is pulled by connecting tube 33 and pushes set 34 It is moved towards front end along feed direction, that is, drives pushing sleeve 32 to be moved towards the direction far from mounting base 10, to make collet 30 and pushing sleeve Relative position between cylinder 34, becomes position as shown in fig. 13 that from position as shown in figure 21；Two activity material folding pawls are in pushing sleeve Under the extruding force effect in 34 pairs of their conically shaped faces of cylinder, the reset force of clamping return unit is overcome, so that feed collet 54 is around the first hinge Axis 62 rotates and carries out clipping operation to workpiece end inwardly, i.e., is turned to such as from the release location of workpiece as shown in Figure 21 and Figure 17 Figure 13 and clamping workpiece position shown in fig. 5.

（3）While feeding driver drives the entire carrying of feeding main shaft device 1 pipe fitting to transfer forward by slide unit, rotation Driver drives pipe fitting to rotate predetermined angular according to bend pipe process driving feeding main shaft 3, and controls bend pipe head to feeding trolley The pipe fitting of conveying carries out bend pipe processing.

In the above-mentioned course of work, activity material folding pawl can be in clamping as shown in Figure 5 around 62 opposite base of the carrier head 4 of the first hinged shaft Reciprocating rotation between the location of workpiece and the release location of workpiece as shown in figure 17.Driving lower edge of the pushing sleeve 32 in clamping driver 2 The direction for being parallel to rotation axis 300 moves back and forth；During it is mobile forward relative to base of the carrier head 4, before pushing sleeve cylinder 34 End face is against on the taper outer barrel face of cone cylinder portion structure, i.e., the taper outer barrel face of cone cylinder portion structure is constituted and 32 extrusion fit of pushing sleeve Compression taper surface, extruding force forces activity material folding pawl to overcome the elastic restoring force of compressed spring 61, that is, clamping overcome to reset The reset force of part and turn to clamping workpiece position as shown in Figure 5 from the release location of workpiece as shown in figure 17；In its opposite folder During headstock 4 moves backwards, the extruding force to cone cylinder portion structure will be gradually discharged, that is, discharges and activity material folding pawl is squeezed Pressure turns to the release location of workpiece to make activity material folding pawl under the reset force effect of clamping return unit from clamping workpiece position. Certainly, taper surface can be arranged on pushing sleeve cylinder 34, and right angle configuration is arranged in the place of compressing of clamping jaw matrix 5 and the taper surface Or ramp structure, to make the lateral surface of clamping jaw matrix 5 realize with respect to the taper surface sliding on pushing sleeve cylinder 34 and open or be closed Operation；That is, being squeezed in press section of the portion with pushing sleeve 32 in clamping jaw matrix 5, one is 300 inclined cloth of relative rotation axis The guide surface set, the guide surface are preferably taper surface to improve extruding contact area, and another one is in clamping return unit reset force Under the action of and be resisted against the directed section on guide surface always, directed section will make when being slided along guide surface clamping jaw matrix 5 by To the extruding force of pushing sleeve cylinder 34.

Bending machine embodiment 2

As the explanation to the utility model bending machine embodiment 2, below mainly pair with above-mentioned bending machine embodiment 1 Difference illustrates, i.e., clamped workpiece can be carried out by being added on the feeding main shaft device of above-mentioned bending machine embodiment 1 More pinpoint workpiece locating mechanism.

As shown in figure 24, in this bending machine embodiment, for driving feeding main shaft 3 predetermined around the rotation of rotation axis 300 The rotating driver of angle is rotary index device, which includes driving synchronizing wheel 11 to rotate by synchronous belt 16 Servo motor 15, and the sensor 17 by 11 side of synchronizing wheel for being monitored to the corner of synchronizing wheel 11.

Referring to Figure 25, it is equipped with its side wall of perforation in the front end of feeding main shaft 3 and the positioning being connected to workpiece accommodating chamber is logical Road 305, the i.e. inner port of placed channel 305 are located in the cavity wall of workpiece accommodating chamber 500 as shown in Figure 8, and placed channel 305 wraps Include the first through hole 344 on 34 side wall of pushing sleeve cylinder and the second through hole on collet；At two activity material folding pawls In clamping workpiece position or in release the location of workpiece when, between the first through hole 344 and the second through hole exist at least partly It docks and constitutes placed channel 305.In the present embodiment, the second through hole is set at the joint close 501 of two clamping jaw matrixes 5.

Referring to Figure 24 to Figure 33, workpiece locating mechanism includes operating-controlling mechanism and the displacement output end mounted on the operating-controlling mechanism On positioning component 9.Operating-controlling mechanism is by output displacement, and to manipulate, the positioning component being mounted on its displacement output end is opposite to be sent Material main shaft 3 does three dimensions movement or does two dimensional surface movement, and wherein two dimensional surface movement was the plane of rotation axis 300 Interior two dimensional motion.For the specific constructive form of operating-controlling mechanism, robot manipulator structure in the prior art can be used and be designed； In the present embodiment, in order to simplify its structure and control method, operating-controlling mechanism is arranged to include that fixing end 70 is cut with scissors by third Axis 64 is hinged on the swing connecting bar 7 in mounting base 10, and for driving swing connecting bar 7 around the third hinged shaft 64 in predetermined pivot angle model Enclose the swinging driver 8 of interior swing；The swinging end 71 of the swing connecting bar 7 constitutes the displacement output end of operating-controlling mechanism, i.e. positioning group Part 9 is mounted on swinging end 71.

Wobble drive bar of the length direction along the radial arrangement of third hinged shaft 64 is equipped in the fixing end 71 of swing connecting bar 7 83, swinging driver 8 includes wobble drive bar 83 and straight-line displacement output mechanism, the stator and peace of the straight-line displacement output mechanism It fills seat 10 to be hinged, mover is hinged by the outer end of articulated joint 82 and wobble drive bar 83.Straight-line displacement output mechanism can be selected from directly Line motor, cylinder and oil cylinder etc., are selected as cylinder in the present embodiment, i.e. the cylinder body 81 of cylinder is articulated with mounting base by hinged shaft 85 On 10, piston rod is hinged to by articulated joint 82 on the outer end of wobble drive bar 83, and specially cylinder body 81 is by hinged seat 86 It is hinged on indirectly in mounting base 10, i.e., hinged seat 86 is removably installed in mounting base 10, and which is provided with and hinged shaft 85 Matched hinge axis hole.And the adjusting screw 84 for adjusting its piston rod stroke range is installed on cylinder, in cylinder body 81 On be installed with adjusting bracket 85 for installation and adjustment screw 84, adjusting screw 84 is installed in rotation on the peace of adjusting bracket 85 On the screw hole of loading board, is rotated, and made in a manner of isogonism speed by keeping adjusting screw rod 84 synchronous with the piston rod of cylinder around hinged shaft 85 The displacement outbound course of the adjusting direction parallel pistons bar of adjusting screw 84, to by the way that the screw rod end of adjusting screw 84 to be located at In the swing path of articulated joint 82, to carry out adjustable restriction to the stroke range of piston rod.During the work time, the work of cylinder Stopper rod pushes wobble drive bar 83 to be rotated around third hinged shaft 64 by articulated joint 82, then drives swing connecting bar 7 around third hinged shaft 64 reciprocally swingings.

Positioning component 9 includes the position block 91 being hinged on swinging end 72 by the 4th hinged shaft 65, is installed in swinging end It is located at position block 91 adjacent to third close to switch 94 and stretching resetting spring 93, the induction end 940 close to switch 94 on 72 The side of hinged shaft 64.The U-shaped mounting groove 720 through its upper and lower two sides is recessed on the front end face of swinging end 72, The U-shaped mounting groove 720 be equipped with 65 matched hinge axis hole of the 4th hinged shaft, to make position block 91 be installed in rotation on In U-shaped mounting groove 720, two cell walls of U-shaped mounting groove 720 constitute position block 91 in the limit in 65 swing process of the 4th hinged shaft Position guide surface；The lower end of position block 91 constitutes the positioning end positioned to workpiece, and the positioning end is around the 4th hinged shaft During 65 rotations, the one side 910 adjacent to third hinged shaft 64 incudes with 940 phase of induction end close to switch 94 to be triggered. The drag hook set for stretching resetting spring 93 is hung on screw 92, and another drag hook set is hung on screw 73, and screw 92 is installed in positioning On the upper surface of block 91, screw 73 is fixed on swinging end 72, and the elastic restoring force for stretching resetting spring 93 forces positioning to keep off The positioning end portion of block 91 turns to the direction for deviateing third hinged shaft 64 around the 4th hinged shaft 65, that is, turning to makes to approach switch 94 from triggering State reset is the position of non-toggle state.As shown in Figure 29, Figure 30, Figure 32 and Figure 33, swinging end 72 is in U-shaped mounting groove 720 It is interior to be equipped with backstop confined planes 7201 and backstop confined planes 7202.

In the bending machine course of work, the workpiece being clamped in feeding main shaft 3 is determined using the workpiece locating mechanism The process of position is specific as follows：

（1）Swinging driver 8 drives swing connecting bar 7 to be swung in predetermined hunting range, makes to be mounted on swinging end 72 The positioning region of position block 91 passes through placed channel 305 to enter in workpiece accommodating chamber 500 as shown in Figure 8, i.e. position block 91 enter against the lower part of triggering end in workpiece accommodating chamber 500, and middle part is located in placed channel 305, and top and close switch 94 are located at except placed channel 305 and workpiece accommodating chamber 500 together.At this point, in the work for stretching 93 elastic restoring force of resetting spring Under, and makes to be set on position block 91 and be limited portion 9100 against backstop confined planes 7201, i.e. 7201 structure of backstop confined planes Stop at forcing positioning end to be less than the limit that predetermined threshold value is swung towards the pivot angle in the direction far from mounting base 10 around the second hinged shaft 65 Stopper makes the positioning end of position block 91 deviate the inductive head 940 close to switch 94, so as to be in non-toggle close to switch 94 State.After position block 91 has been enter into its lower end in workpiece accommodating chamber 500 in order to prevent, swinging driver 8 continues to drive Swing connecting bar 7 is swung around counter clockwise direction of the third hinged shaft 64 in such as Figure 27, can be fixed on the hinged shaft frame of third hinged shaft 64 Travel switch is detected close to switch, photoelectric sensor with swinging state in place to it, that is, limits swing connecting bar 7 around third Hinged shaft 64 swings pivot angle range in the counterclockwise direction.

（2）As shown in figure 32, with wait for bend pipe processing pipe fitting 01 stretched into as shown in Figure 8 from the front port of feeding main shaft 3 Workpiece accommodating chamber 500 in, the lower end of position block 91 under the promotion of pipe fitting 01, overcome stretch resetting spring 93 elasticity Restoring force and rotated in an anti-clockwise direction towards as shown in figure 31 around the 4th hinged shaft 65, and go to its side 910 against backstop limit It simultaneously triggers close to switch 94 in face 7202；Trigger signal, control unit foundation are exported close to switch 94 to the control unit of bending machine The trigger signal and stopping continues to convey pipe fitting 01, and is positioned to the end face of workpiece 01, and position is as shown in figure 33 at this time, i.e., At this moment, if keeping out without workpiece 01, positioning end is only swung towards the direction far from mounting base 10 around the second hinged shaft 65, positioning The lean normal direction relative rotation axis 300 of end side surface of positioning of end and workpiece is downwardly inclined arrangement, that is, keeps out side 9101 Normal direction relative rotation axis 300 towards tilt down arrangement, also with 9102 relative rotation axi of central axis for this position block Its lower end of line 300 is in tilted layout towards close to the direction of mounting base 01.So as to be deviated from close to switch 94 using position block 91 Side present position is that the endface position of workpiece 01 effectively improves its positioning accuracy to be positioned to pipe fitting 01.

（3）Feeding main shaft 3 is driven to be pressed from both sides to completing the pipe fitting 1 after positioning by clamping driver 1 as shown in Figure 1 It holds, then controls swinging driver 8 and drive swing connecting bar 7 around third hinged shaft 64, swung towards clockwise direction as shown in figure 27 It is detached from placed channel 305 completely to 91 lower end of position block, as shown in figure 33, due to 91 central axis of position block 9102 its lower end of relative rotation axis 300 tilt low-angle arrangement towards close to the direction of mounting base 10, usually 5 degree to 6 degree Low-angle arrange, to make swing connecting bar 7 around the first hinged shaft 64 swings and by position block 91 pull out placed channel when, position As shown in curve 01000, which will not generate interference with workpiece 01 and have good positioning the movement locus of side 9101 Workpiece 01 has an impact, and the workpiece locating mechanism after detaching will not cause to interfere to the rotation of feeding main shaft 3 and feeding process. It can be carried out by the travel switch that is installed on the hinged shaft frame of third hinged shaft 64, close to the sensors such as switch or light sensor Swing detects in place, and to make the pivot angle range of the clockwise oscillation of swing connecting bar 7 be limited, i.e., swinging driver 8 drives Swing connecting bar 7 is swung around third hinged shaft 64 within the scope of predetermined pivot angle.

It is also possible to use controlled telescopic positioning block piece substitutes upper backstop confined planes 7202 to determine position block 91 The backstop of position pushing course and realize positioning, i.e., in positioning, formula controls telescopic positioning block piece towards the side of separate mounting base 10 To when extending out to it and being located at position location against end face, after completing to the positioning of position block 91, telescopic positioning block piece Abutment face be moved to remotely located position towards the direction close to mounting base 10, the positioning end of position block 91 can be around the at this time Two hinged shafts 65 swing a low-angle towards close to the direction of mounting base 10, right so as to when position block 91 detaches placed channel The end of workpiece 01 is applied for elastic force and is had an impact without the positioning accuracy to the workpiece 01 having had good positioning.

（4）It is revolved with driving pipe fitting 01 in the feeding process that positioning component 9 is rocked to evacuation feeding main shaft with swing connecting bar 7 Behind the position turned, control feeding trolley coordinates with bend pipe head and carries out bend pipe processing to pipe fitting 01.

In position fixing process, constituted in the present embodiment close to switch 94 for coordinating to detect work end with position block 91 The sensor whether portion compresses and position block is pushed to go to precalculated position around the 4th hinged shaft 65, the precalculated position are pipe fitting 01 End position location；Certainly, other sensors can be used to be detected, preferably travel switch, piezo-electric pressure sensor or on It states close to the contact trigger sensor such as switch.Operating-controlling mechanism is for controlling positioning component 9 across placed channel 305 and entering work To detect whether workpiece end extends to precalculated position in part accommodating chamber 500, or sequentially exit workpiece accommodating chamber 500 and placed channel 305 and avoid the course of work of feeding main shaft.

When using trigger sensor is contacted, contact trigger sensor installation site is not limited to foregoing description skill Sensor is mounted on the swinging end 72 of swing connecting bar 7 by art scheme, and stretch into workpiece in the lower end of position block 91 and hold Receive chamber 500 and when being pushed to precalculated position by workpiece, contact trigger sensor is compressed in by position block and triggered, also can will Contact trigger sensor is stretched mounted on position block 91 on the side of third hinged shaft 64, and in the end of position block 91 When entering workpiece accommodating chamber 500 and being pushed to precalculated position by workpiece, contact trigger sensor is compressed by swinging end 72 and is triggered.

Feeding main shaft device embodiment

Included the explanation to the utility model feeding main shaft device embodiment in the explanation of above-mentioned bending machine embodiment, Details are not described herein.

Feed collet mechanism embodiment

Collet in above-mentioned bending machine embodiment in feeding main shaft device constitutes this feed collet embodiment together with pushing sleeve cylinder, Middle pushing sleeve cylinder constitutes the pushing cylinder in the utility model feed collet mechanism, i.e., has included to this in the explanation of above-mentioned bending machine embodiment The explanation of utility model feed collet mechanism embodiment, details are not described herein.

In this above-described embodiment, " front end " is configured as with " rear end " along the direction of parallel rotating axis 300, neighbouring rotation The one end for turning driver 11 is rear end, and separate one end is configured as front end, wherein " rear end " is also referred to as " tail end "." workpiece Radial direction " be configured as the radial direction of the cylindrical structure of axis centered on a rotation axis 300, and the cross-sectional shape of workpiece is limited It is set to circular configuration." clamping workpiece position " is with " the release location of workpiece " for for relative position, the former is configured as material folding pawl Opening angle it is smaller than the latter, i.e., its opening angle at the two position depend on clamped workpiece shape and size, The former, which is clamped to, can clamp workpiece, and the latter is flared to the angle that can take out workpiece or more on the basis of the former, without absolute Sizes values.Certain component is connected to by " being hinged in mounting base 10 " etc. by hinged shaft or being fixedly connected on certain component Mode is configured as the mode being directly fixedly connected or the mode being fixedly connected indirectly, wherein the mode being fixedly connected indirectly is i.e. Can as needed to add connecting component between the two being mutually fixedly connected, of courses, these connecting components can also be understood For the component part of the comparative basis component such as mounting base.

The central scope of the utility model is improved by the structure to the feed collet mechanism in feeding main shaft device, with At least part material folding pawl is arranged to through the hinged activity material folding pawl of hinged shaft, with improve Liao Zhao mechanisms it is opposite open stroke with The workpiece for matching bigger radial dimension range, according to this design, the structure of feed collet mechanism also changes there are many obvious, than Such as, the fixation material folding pawl that material folding pawl can be by clamping face central angle less than 180 degree is formed with activity material folding pawl, or by three or more Activity material folding pawl forms, it is not limited to structure described in above-described embodiment；In addition, also pushing sleeve can be arranged to be sleeved on shape At the collet interior for having inner via hole, pushing sleeve squeezes the material folding pawl on the outside of its end from the inside, makes material folding pawl in open configuration Pipe fitting of the set state outside it is clamped, and the reset force of return unit forces material folding pawl to close and discharge the folder to pipe fitting Hold, so as to by feeding main shaft be sized to radially size be less than or equal to pipe fitting to be processed, effectively reduce with circle mould, The interference of clamping and conducive to short pipe fitting processing；In such cases, " clamping workpiece position " and " the release location of workpiece " are also phase For position, when the opening angle that the former is configured as material folding pawl is bigger than the latter, and its open-angle at the two position Shape and size of the degree depending on clamped workpiece, the former, which is clamped to, can clamp workpiece, and the latter closes on the basis of the former To the angle that can take out workpiece or more, not absolute sizes values.

Claims (10)

1. a kind of feeding main shaft device, including mounting base and clamping driver in the mounting base and can be around rotary shaft Line is rotatably mounted at the feeding main shaft in the mounting base, and the feeding main shaft includes live spindle, is installed in the rotation Collet on the front end of main shaft and the pushing sleeve being mutually arranged with the live spindle, it is characterised in that：

The collet includes that return unit, the base of the carrier head being installed in the live spindle is clamped and is hinged to institute by the first hinged shaft The activity material folding pawl on base of the carrier head is stated, the activity material folding pawl can be in clamping workpiece position and release workpiece around first hinged shaft Reciprocating rotation between position；

The reset force of the clamping return unit forces the activity material folding pawl around first hinged shaft from the clamping workpiece position Turn to the release location of workpiece；By the clamping driver, drivingly the relatively described live spindle edge is parallel to institute to the pushing sleeve The direction for stating rotation axis moves back and forth, and squeezes the activity material folding pawl and the activity material folding pawl is forced to overcome the reset force To turn to the clamping workpiece position, or release to the activity material folding pawl from the release location of workpiece around first hinged shaft Extruding.

2. feeding main shaft device according to claim 1, it is characterised in that：

The base of the carrier head includes having the cylindrical body for the central through hole arranged along the direction and from before the cylindrical body The hinged ear mount that end face is formed along the direction evagination, the hinged ear mount are equipped with and the matched hinged shaft of the first hinged shaft Hole, the activity material folding pawl and described be hinged between ear mount through the connection structure of first stud connection are V shape connector knot Structure.

3. feeding main shaft device according to claim 2, it is characterised in that：

The activity material folding pawl includes the clamping jaw matrix hinged with the base of the carrier head and is removably mounted on the clamping jaw matrix On feed collet；The pushing sleeve is sleeved on outside the live spindle；

The clamping jaw matrix is the cone cylinder portion structure that cross section central angle is less than 180 degree, the outer barrel face structure of cone cylinder portion structure At the compression taper surface with the pushing sleeve phase extrusion fit；

The hinged ear mount is equipped with the screw hole arranged along the direction and be connected to the hinge axis hole, is matched with the screw hole Holding screw for fixing first hinged shaft.

4. the feeding main shaft device according to any one of claims 1 to 3 claim, it is characterised in that：

The clamping return unit is compressed spring, and one end of the compressed spring is pressed on the base of the carrier head, and the other end compresses On the tail end of the activity material folding pawl；

In the projection on the cross section of the rotation axis, the projection by pressure section of the tail end is towards described in direction Deviate the projection of first hinged shaft in the direction of rotation axis.

5. feeding main shaft device according to claim 4, it is characterised in that：

The base of the carrier head is equipped with the spring mounting hole arranged along the direction, and the compressed spring is sleeved on the spring installation In hole, and one end is pressed on the bottom surface of the spring mounting hole, and the other end compresses on the end face of the tail end；

The quantity of the activity material folding pawl is two, the parallel arrangement of two first hinged shafts；

In same activity material folding pawl, along the direction, the tail end is located at the end of an axial end side of first hinged shaft For short end portion, the end for being located at another axial end side of first hinged shaft is long end；

The long end portion of two activity material folding pawls not Wei Yu first hinged shaft an axial end side, activity material folding pawl The direction bending of long end towards the short end portion for being directed toward another activity material folding pawl extend to form it is described by pressure section, it is described to be compressed The both ends of the surface of portion in said direction are the inclined-plane arranged towards the direction far from first hinged shaft, and the compressed spring compresses On the outer tail end by pressure section.

6. the feeding main shaft device according to any one of claims 1 to 3 claim, it is characterised in that：

The guiding bond structure arranged along the direction is equipped between the pushing sleeve and the live spindle；

The lateral surface of the rear end of the pushing sleeve is equipped with the annular groove around rotation axis arrangement, the clamping driving Device includes the connecting rod base being installed in the mounting base, and fixing end is connected by the hinged push-and-pull of the second hinged shaft and the connecting rod base Bar, the swinging driver for pushing the push-and-pull connecting rod to be swung around second hinged shaft, and can be along the slot of the annular groove Wall surface is rollably installed in the idler wheel on the push-and-pull connecting rod.

7. feeding main shaft device according to claim 1 or 2, it is characterised in that：

The pushing sleeve is sleeved on outside the live spindle；

Material folding pawl on the collet is the activity material folding pawl, and the quantity of the activity material folding pawl is two or more；

Rotary index device for driving the feeding main shaft to rotate predetermined angular is installed in the mounting base；

The side wall of the pushing sleeve is equipped with the first through hole, and the collet is equipped in clamping workpiece state and release work status Shi Junneng is at least partly docked with first through hole to constitute the second through hole of placed channel, the placed channel it is interior Port is located in the cavity wall of the workpiece accommodating chamber of the feeding main shaft；

The workpiece locating mechanism being installed in the mounting base, the workpiece locating mechanism include operating-controlling mechanism and are mounted on described Positioning component on the displacement output end of operating-controlling mechanism；

The positioning component by the operating-controlling mechanism control pass through the placed channel and enter the workpiece accommodating chamber in Whether detection workpiece end extends to precalculated position, or sequentially exits the workpiece accommodating chamber and the placed channel.

8. a kind of bending machine, including control unit, rack and the feeding trolley in the rack and bend pipe head, described Feeding trolley includes feeding guide, is slidably mounted on the feeding guide slide unit, sending on the slide unit The feeding driver that material main shaft device and the driving slide unit reciprocatingly slide along the feeding guide；

It is characterized in that：

The feeding main shaft device is the feeding main shaft device described in any one of claim 1 to 7 claim.

9. a kind of feed collet mechanism, including collet and pushing cylinder, the pushing cylinder can along itself axial reciprocating movably with the collet phase Suit, it is characterised in that：

The collet includes clamping return unit, base of the carrier head and the activity material folding pawl being hinged to by hinged shaft on the base of the carrier head, institute State activity material folding pawl around the hinged shaft can clamping workpiece position and release the location of workpiece between reciprocating rotation；

The reset force of the clamping return unit forces the activity material folding pawl to be turned to from the clamping workpiece position around the hinged shaft The release location of workpiece；

The pushing cylinder is moved along the axial reciprocating, squeezes the activity material folding pawl and to force the activity material folding pawl to overcome described Reset force from the release location of workpiece around the hinged shaft to turn to the clamping workpiece position, or release to the activity material folding The extruding of pawl.

10. feed collet mechanism according to claim 9, it is characterised in that：

The pushing cylinder is sleeved on outside the collet；

Material folding pawl on the collet is the activity material folding pawl, and the quantity of the activity material folding pawl is two or more；

The base of the carrier head includes having along the cylindrical body of the axial arranged central through hole and from before the cylindrical body The hinged ear mount that end face is formed along the axial evagination, the hinged ear mount be equipped with the matched hinge axis hole of the hinged shaft, The activity material folding pawl and described be hinged between ear mount through the connection structure of the stud connection are V shape joint structure；

The hinged ear mount is equipped with along screw hole that is described axial arranged and being connected to the hinge axis hole, is matched with the screw hole Holding screw for fixing the hinged shaft；

The activity material folding pawl includes the clamping jaw matrix hinged with the base of the carrier head and is removably mounted on the clamping jaw matrix On feed collet；

It is equipped with along the axial arranged guiding bond structure between the pushing cylinder and the base of the carrier head.