CN209407247U - The positioning of tubing zero-bit and double-station material-supporting device in bending machine - Google Patents

Abstract

The utility model relates in bending machine tubing zero-bit positioning and double-station material-supporting device, including rack and it is set on the rack material carrying mechanism, material carrying mechanism includes: retainer fixed plate and the retainer carrying roller that is movably connected in retainer fixed plate, two-part retainer oil cylinder is installed under retainer fixed plate on methods, rack, two-part retainer oil cylinder has setting up and down second, First piston bar, it is installed with retainer guide pillar seat on the rack, second piston bar is upward through retainer guide pillar seat and is mutually fixedly connected with retainer fixed plate, the long guide post that movable can be threaded through in retainer guide pillar seat is arranged in retainer fixed plate two sides, two-part retainer oil cylinder can drive retainer fixed plate to move up and down, so as to send tubing to be processed to supreme bend pipe mould or lower bend pipe mould convenient for retainer carrying roller；The strong retaining device of zero-bit positioning is equipped in the rack at material carrying mechanism rear.The advantages of the utility model: zero-bit positioning is carried out without artificial, being accurate to bent tube section up to each bend pipe mould for tubing can be made.

Description

The positioning of tubing zero-bit and double-station material-supporting device in bending machine

Technical field

The utility model relates into bending machine tubing zero-bit positioning and material-supporting device.

Background technique

When carrying out bend pipe processing using bending machine, one end of tubing to be processed is usually placed on to the feeder of bending machine In structure, the progress bend pipe in the bend pipe mould for being set to bending machine front end that is transported to bent tube section of tubing is added by feeding mechanism Work.When needing to carry out the processing of continuous bend pipe to tubing, it is sometimes desirable to from top to bottom be disposed with two in the front end of bending machine Bend pipe mould is covered to meet process requirements, is upper bend pipe mould, lower bend pipe mould respectively.In addition, adding carrying out bend pipe to tubing Before work, need to position the initial position of tubing --- i.e.: zero-bit positioning is carried out, is positioned by the zero-bit to tubing, Tubing accurately conveys to the length of setting convenient for feeding mechanism to bending machine front end, so as to by tubing to bent tube section essence It is sent to bend pipe mould, really to ensure the quality of bend pipe.After the zero-bit positioning of tubing to be processed, so that it may by feeding mechanism By being conveyed to bent tube section to the bend pipe mould of bending machine front end for tubing, and according to each curved production, by feeder Tubing is delivered to upper bend pipe mould or moved down and is delivered to lower bend pipe mould and carry out by structure to bent tube section or move up respectively Tubing when bent tube section is delivered up in supreme bend pipe mould of tubing is in upper station, sent by bend pipe work, feeding mechanism Expect that tubing when bent tube section is delivered to lower bend pipe mould downwards of tubing is in lower station by mechanism.Bending machine is to pipe at present When material carries out bend pipe processing, has the disadvantage in that 1, when carrying out zero-bit positioning to tubing, usually determined by manual measurement , such manual measurement method can not only have some deviations, to will affect the bending quality of tubing, and working efficiency compared with It is low；2, one end of tubing to be processed is placed in feeding mechanism, and being delivered to bent tube section by tubing by feeding mechanism During upper bend pipe mould or lower bend pipe mould, tubing is because self weight intermediate portion is easily bent downwardly deformation, to be easy to produce Raw drift is shaken, it is difficult to accurately reach upper bend pipe mould or lower bend pipe mould, it is often necessary to artificial to carry out auxiliary operation ability really Guarantor moves to bend pipe mould or lower bend pipe mould, reduces the working efficiency of bend pipe, also will affect the quality of bend pipe product.

Utility model content

The technical issues of being solved needed for the utility model: it will provide a kind of without manually carrying out zero-bit positioning and in feeding It is not easy bending deformation, in the process so as to making being accurate to bent tube section up to the pipe in the bending machine of each bend pipe mould for tubing The positioning of material zero-bit and double-station material-supporting device.

To solve the above problems, the technical solution adopted in the utility model is: the tubing zero-bit in the bending machine is fixed Position and double-station material-supporting device, comprising: rack is provided with material carrying mechanism on the rack, and the material carrying mechanism includes: that retainer is fixed Plate, is connected with the retainer carrying roller that can hold tubing to be processed in retainer fixed plate, in the rack below retainer fixed plate It is fixedly installed two-part retainer oil cylinder, there is second piston bar and first piston setting up and down in two-part retainer oil cylinder Bar is fixedly installed retainer guide pillar seat on the rack, and a through-hole is equipped in retainer guide pillar seat, and second piston bar is upward through It is mutually fixedly connected after through-hole with retainer fixed plate, is respectively arranged with guide post through-hole at the both ends of retainer guide pillar seat, is fixed in retainer The two sides of plate are fixedly installed long guide post respectively, the long guide post of the retainer fixed plate two sides guide post with retainer guide pillar seat both ends respectively Through-hole corresponds, and activity penetrates corresponding guide post through-hole in retainer guide pillar seat, two-part retainer oil cylinder energy to each long guide post respectively Driving retainer fixed plate moves up and down, and when First piston bar extends upwards, energy pushing tow second piston bar extends upwards, until the When one piston rod is fully extended, the second piston bar raised at this time can make retainer carrying roller reach the first retainer station, reach the The retainer carrying roller of one retainer station, which can smoothly be held, conveys the tubing to be processed positioned at lower station to come by feeding mechanism；When Second piston bar is extended upwards until when its is fully extended, and second piston bar fully extended at this time can make retainer carrying roller reach the Two retainer stations, the retainer carrying roller for reaching the second retainer station, which can smoothly be held, is located at upper work by what feeding mechanism conveying came The tubing to be processed of position；Second piston bar and First piston bar can make when bouncing back downwards retainer carrying roller leave the second retainer station or First retainer station；The strong gear machine that zero-bit positioning can be carried out to tubing to be processed is provided in the rack at material carrying mechanism rear Structure.

Further, the tubing zero-bit positioning in bending machine above-mentioned and double-station material-supporting device, wherein strong retaining device Structure includes: to be fixedly installed mounting rack on the rack, and strong gear cylinder, the strong piston for keeping off cylinder are vertically arranged on mounting rack Bar downwards and is connected with mounting base, is provided on the rear end face of mounting base and connect with the control device electric signal in bending machine Close to switch, one block baffle is hinged with by a shaft in the rear end of mounting base, baffle, which rotates forward, can touch close to switch, Elastic parts is additionally provided in mounting base, baffle can rotate backward and leave close under the outside elastic force effect of elastic parts Switch, when by force gear cylinder piston rod extend downwardly when, can drive baffle be displaced downwardly to can stop tubing to be processed continue it is past The position of preceding conveying, in this way, during feeding mechanism conveys tubing to be processed into bending machine front end bend pipe mould, it is to be added Work tubing can strike baffle, and the elastic force for making baffle overcome elastic parts outside and rotate forward, until be resisted against mounting base Rear end face on, at this time tubing to be processed just by baffle live and be located at null positions, baffle can just touch in the process Nearly switch is abutted against, zero signal will be sent to control device close to switch.

Further, the tubing zero-bit positioning in bending machine above-mentioned and double-station material-supporting device, wherein the elasticity The structure of component includes: the limiting slot that rear end opening is provided in mounting base, and the first block is movably set in limiting slot, The screw rod of stay bolt from the front to the back protrude into limiting slot and be mutually fixedly connected with the first block by activity, is additionally provided in limiting slot strong Spring is kept off, the strong both ends for keeping off spring bear against the slot bottom of the first block and limiting slot, and the strong spring that keeps off makes the first block always The trend of close switch is left with moving backward along limiting slot and baffle being pushed to rotate backward.

Further, the tubing zero-bit positioning in bending machine above-mentioned and double-station material-supporting device, wherein in the first block Front end face on forward extended out first blend stop of circle, the strong rear end for keeping off spring extend into the first positioning that the first blend stop is surrounded In slot.

Further, the tubing zero-bit positioning in bending machine above-mentioned and double-station material-supporting device, wherein stay bolt and the The connection type that one block is mutually fixedly connected are as follows: threaded hole is provided on the first block, stay bolt is threaded through in threaded hole simultaneously It is threadedly coupled with the first block.

Further, the tubing zero-bit positioning in bending machine above-mentioned and double-station material-supporting device, wherein in limiting slot It is additionally provided with the second block, is stretched out backward on the rear end face of the second block and is provided with second blend stop of circle, before strong gear spring End is extend into the second positioning groove that the second blend stop is surrounded.

Further, the tubing zero-bit positioning in bending machine above-mentioned and double-station material-supporting device, wherein in mounting base Screw rod between front end face and stay bolt head is equipped with stop nut.

Further, the tubing zero-bit positioning in bending machine above-mentioned and double-station material-supporting device, wherein on mounting rack There are two support through holes, two support through holes are located at the two sides of strong gear cylinder for setting, fix respectively in the two sides of mounting base It is provided with one strong gear guide post, two support through holes on mounting rack are corresponded with the strong gear guide post of mounting base two sides respectively, Every strong gear guide post upward activity from the support through holes of respective side is pierced by.

Further, in bending machine above-mentioned tubing zero-bit positioning and double-station material-supporting device, wherein retainer carrying roller with The connection type of retainer fixed plate are as follows: be respectively arranged with roller seat at the both ends of retainer carrying roller, retainer carrying roller can be rotatably set On two roller seats, adjusting screw rod, adjusting screw rod and retainer fixed plate screw thread are connected in the bottom of each roller seat Connection.

The utility model has the following beneficial effects: gear is touched in one end of tubing when carrying out zero-bit positioning to tubing to be processed Plate is simultaneously lived by baffle and is located at null positions, and baffle can overcome the elastic force of elastic parts and switch with close in the process It touches, by the zero signal is sent to control device close to switch and then completes the zero-bit positioning work of tubing, tubing Zero-bit positioning work it is more convenient accurate compared to manual measurement positioning；Retainer carrying roller drives retainer by two-part retainer oil cylinder Fixed plate moves up and down and can hold tubing, and the middle part due to tubing is held, and tubing would not be due to self gravity to issuing Raw bending deformation, is just not likely to produce shaking and drift in transmission process, thus can convenient for tubing to bent tube section by accurately suitable It is sent to supreme bend pipe mould or lower bend pipe mould sharply, whole process carries out auxiliary operation without artificial, substantially increases bend pipe Working efficiency, while also improving the quality of bend pipe product.

Detailed description of the invention

Fig. 1 is the positioning of tubing zero-bit and the structural representation of double-station material-supporting device in bending machine described in the utility model Figure.

Fig. 2 is the sectional view in Fig. 1 at A-A.

Fig. 3 is the right view of strong retaining device in Fig. 1.

Fig. 4 is the enlarged structure schematic diagram in Fig. 1 at B.

Fig. 5 is baffle and structural schematic diagram when mutually touching close to switch in Fig. 4.

Fig. 6 is the structural schematic diagram that elastic parts is removed in Fig. 5.

Fig. 7 is the enlarged structure schematic diagram in Fig. 3 at C.

Fig. 8 is the position view close to switch in Fig. 1 left view direction in mounting base.

Specific embodiment

With reference to the accompanying drawing and preferred embodiment is described in further detail technical solution described in the utility model.

As shown in Figure 1, Figure 2, Figure 3 shows, the tubing zero-bit positioning in bending machine described in the utility model and double-station retainer Device, comprising: rack 1 is provided with material carrying mechanism 2 in rack 1, and the material carrying mechanism 2 includes: retainer fixed plate 21, is holding in the palm Expect to be connected with the retainer carrying roller 22 that can hold tubing to be processed in fixed plate 21, it is solid in the rack of 21 lower section of retainer fixed plate Surely it is provided with two-part retainer oil cylinder 23, the two-part retainer oil cylinder 23 is made of upper and lower two independent oil cylinders, that is, is located at Second oil cylinder of top and underlying first oil cylinder, and the First piston bar 232 of the first oil cylinder is extended upwardly into second Second piston in the cylinder body of oil cylinder and in energy the second oil cylinder of pushing tow, retainer guide pillar seat 24 is fixedly installed in rack 1, is being held in the palm Expect that guide pillar seat 24 is equipped with a through-hole 241, the second piston bar 231 of the second oil cylinder is consolidated after being upward through through-hole 241 with retainer 21 phase of fixed board is fixedly connected, and guide post through-hole 242 is respectively arranged at the both ends of retainer guide pillar seat 24, the two of retainer fixed plate 21 Side is fixedly installed long guide post 243 respectively, the long guide post 243 of 21 two sides of retainer fixed plate respectively with 24 both ends of retainer guide pillar seat Guide post through-hole 242 corresponds, and activity penetrates in retainer guide pillar seat 24 in corresponding guide post through-hole 242 each long guide post 243 respectively, Two-part retainer oil cylinder 23 can drive retainer fixed plate 21 to move up and down, and retainer fixed plate 21 can be led when moving up and down by length Up and down motion of the column 243 in guide post through-hole 242 and do not shake steadily it is mobile, so that drive is movably connected in retainer fixed plate Retainer carrying roller 22 on 21 steadily without shaking moves up and down.First piston bar 232 is extended upwards when starting the first oil cylinder When can the elongation upwards of pushing tow second piston bar 231, until second raised at this time is living when First piston bar 232 is fully extended Stopper rod 231 can make retainer carrying roller 22 reach the first retainer station, and the retainer carrying roller 22 for reaching the first retainer station can smoothly be held in the palm The tubing to be processed positioned at lower station to come is firmly conveyed by feeding mechanism, convenient for accurately being conveyed to bent tube section for tubing To lower bend pipe mould；Second piston bar 231 is extended until when its is fully extended upwards when starting the second oil cylinder, is stretched completely at this time Second piston bar 231 out can make retainer carrying roller 22 reach the second retainer station, reach the retainer carrying roller 22 of the second retainer station It can smoothly hold and the tubing to be processed positioned at upper station to come is conveyed by feeding mechanism, convenient for tubing to bent tube section quilt Accurately be delivered to bend pipe mould, second piston bar 231 and First piston bar 232 can make when bouncing back downwards retainer carrying roller 22 from Open the second retainer station or the first retainer station；Tubing to be processed can be carried out by being provided in the rack 1 at material carrying mechanism rear The strong retaining device 3 of zero-bit positioning.

In the present embodiment, as shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, the structure of the strong retaining device 3 include: It is fixedly installed mounting rack 32 in rack 1, strong gear cylinder 33, the strong piston rod for keeping off cylinder 33 are vertically arranged on mounting rack 32 Downwards and it is connected with mounting base 34, is provided on the rear end face of mounting base 34 and is connect with the control device electric signal in bending machine Close to switch 6, one block baffle 35 is hinged with by the shaft 7 of one or so trend in the rear end of mounting base 34, baffle 35 to Forward kinetic energy is touched close to switch 6, and elastic parts, the elastic force outside in elastic parts of baffle 35 are additionally provided in mounting base 34 It can rotate backward and be left close to switch 6 under effect, when the piston rod for keeping off cylinder 33 by force extends downwardly, can be driven under baffle 35 The position that tubing to be processed continues to convey forward can be stopped by moving to, in this way, in feeding mechanism toward bending machine front end bending die During conveying tubing to be processed in tool, tubing to be processed can strike baffle 35, and make baffle 35 overcome elastic parts to Outer elastic force and rotate forward, until be resisted against on the rear end face of mounting base 34, tubing to be processed is just lived by baffle at this time And it is located at null positions, baffle 35 can just be touched close to switch 6 in the process, will be sent out close to switch 6 to control device Stop signal can be sent to feeding mechanism after sending zero signal, control device to receive zero signal latter aspect and keeps off gas to strong Cylinder 33, which is sent, rises return signal, and feeding mechanism pause is made to convey tubing to be processed, and keeps the piston rod for keeping off cylinder 33 by force upward Retraction drives baffle 35 to move up tubing to be processed of letting pass；On the other hand, control device can send out again the delivered length signal of setting Feeding mechanism is given, tubing to be processed is conveyed forward to the length of setting again by feeding mechanism.

In the present embodiment, the structure of the elastic parts includes: that the limit of rear end opening is provided in mounting base 34 Slot 341 is movably set with the first block 42 in limiting slot 341, and limiting slot is protruded into activity to the screw rod of stay bolt 45 from the front to the back It 341 and is fixedly connected with 42 phase of the first block, strong gear spring 43 is additionally provided in limiting slot 341, the strong spring 43 that keeps off is sleeved on On stay bolt 45, the strong both ends for keeping off spring 43 bear against the slot bottom of the first block 42 and limiting slot 341, and the strong spring 43 that keeps off makes First block 42 has to move backward along limiting slot 341 and baffle 35 is pushed to rotate backward always leaves the trend of close switch 6.

In the present embodiment, first blend stop of circle 421 has been forward extended out on the front end face of the first block 42, it is strong to keep off spring 43 Rear end extend into the first locating slot that the first blend stop 421 is surrounded.In the present embodiment, it is additionally provided in limiting slot 341 Second block 41 stretches out backward on the rear end face of the second block 41 and is provided with second blend stop of circle 411, before strong gear spring 43 End is extend into the second positioning groove that the second blend stop 411 is surrounded, and it is fixed that the strong front and rear ends for keeping off spring 43 are respectively clamped into second In position groove and the first positioning groove, the strong gear spring 43 of installation in this way is more convenient, and is not likely to produce offset at work, mentions The high stability of assembly efficiency and work.It in the present embodiment, assembles for convenience, stay bolt 45 is fixed with 41 phase of the first block The connection type of connection are as follows: threaded hole is provided on the first block 42, stay bolt 45 is threaded through in threaded hole and and first gear Block 42 is threadedly coupled.In the present embodiment, it is arranged on the screw rod between 45 head of front end face and stay bolt of mounting base 34 limited Position nut 44, by the shift motion of adjustable first block 42 of rotary stopper nut 44, and then controllable register 35 is by first The distance that block 42 ejects backward, while being also avoided that the first block 42 deviates from limiting slot 341 in use, it improves and sets Standby stability in use.In the present embodiment, there are two support through holes 321, two support through holes 321 to divide for setting on mounting rack 32 The two sides that cylinder 33 Wei Yu not kept off by force are fixedly installed one strong gear guide post 322, mounting rack 32 in the two sides of mounting base 34 respectively On two support through holes 321 corresponded respectively with the strong gear guide post 322 of mounting base two sides, every strong gear guide post 322 is from right It answers upward activity in the support through holes 321 of side to be pierced by, keeps off the piston rod of cylinder 33 by force when flexible, the peace mutually fixed with piston rod Dress seat 34 can smoothly be moved down or up in the support through holes 321 of respective side by each strong gear guide post 322.The present embodiment In, the connection type of retainer carrying roller 22 and retainer fixed plate 21 are as follows: it is respectively arranged with roller seat 5 at the both ends of retainer carrying roller 22, Retainer carrying roller 22 is rotatably arranged on two roller seats 5, is connected with adjusting screw rod in the bottom of each roller seat 5 51, adjusting screw rod 51 is threadedly coupled with retainer fixed plate 21, can be finely adjusted in this way to the height of retainer carrying roller 22, can More reliablely and stablely hold tubing to be processed.

Working principle of the utility model is: first extending downwardly the piston rod for keeping off cylinder 33 by force, baffle 35 is driven to be displaced downwardly to The position that tubing to be processed advances can be blocked, then starts feeding mechanism and moves the preceding extreme direction of tubing to be processed towards bending machine Dynamic, during tubing to be processed Forward, tubing to be processed will push elastic force that baffle 35 overcomes elastic parts outside to forward Dynamic, when baffle 35, which turns to forward, to be resisted against on 34 rear end face of mounting base, tubing to be processed is just blocked and is located at zero-bit Position, baffle 35 can be touched close to switch 6 in the process, and zero signal, control will be sent to control device close to switch 6 Device, which receives the zero signal latter aspect and can send pause signal to feeding mechanism and send to strong gear cylinder 33, rises return Signal makes feeding mechanism pause convey tubing to be processed, and the piston rod for keeping off cylinder 33 by force is made to bounce back upwards, drives on baffle 35 Tubing to be processed of letting pass is moved, to complete to position the zero-bit of tubing to be processed；On the other hand, control device can be by the defeated of setting It send length signals to be then forwarded to feeding mechanism, feeding mechanism is made to continue the length that tubing to be processed is fed forward to setting；Herein In the process, start two-part retainer oil cylinder 23, and according to the production demand of bend pipe, when need to be located at the tubing of lower station to When bent tube section is transported to lower bend pipe mould, drives First piston bar 232 and keep its fully extended, fully extended first piston 232 pushing tow of bar second piston bar 231 upwards elongation make retainer carrying roller 22 reach the first retainer station；When needs will be located at upper work Position tubing when bent tube section is transported to upper bend pipe mould, driving second piston bar 231 stretch out fully up, can make to hold in the palm Material torr roller 22 reaches the second retainer station.

The advantages of the utility model are as follows: when carrying out zero-bit positioning to tubing to be processed, one end touching baffle of tubing is simultaneously By baffle live and be located at null positions, in the process baffle can overcome elastic parts elastic force and with approach switch It touches, by the zero signal is sent to control device close to switch and then completes the zero-bit positioning work of tubing, the zero of tubing Position positioning work is more convenient compared to manual measurement positioning accurate；Retainer carrying roller drives retainer to fix by two-part retainer oil cylinder Plate moves up and down and can hold tubing, and the middle part due to tubing is held, and tubing would not occur downwards curved because of self gravity Song deformation is just not likely to produce shaking and drift in transmission process, thus can be convenient for tubing to bent tube section by accurately successfully It is sent to supreme bend pipe mould or lower bend pipe mould, whole process carries out auxiliary operation without artificial, substantially increases the work of bend pipe Make efficiency, while also improving the quality of bend pipe product.

Claims (9)

1. the positioning of tubing zero-bit and double-station material-supporting device in bending machine, comprising: rack, it is characterised in that: set on the rack Be equipped with material carrying mechanism, the material carrying mechanism includes: retainer fixed plate, be connected in retainer fixed plate can hold it is to be processed The retainer carrying roller of tubing is fixedly installed two-part retainer oil cylinder, two-part retainer oil cylinder in the rack below retainer fixed plate In have second piston bar and First piston bar setting up and down, be fixedly installed retainer guide pillar seat on the rack, led in retainer Column base is equipped with a through-hole, and second piston bar is mutually fixedly connected after being upward through through-hole with retainer fixed plate, in retainer guide post The both ends of seat are respectively arranged with guide post through-hole, are fixedly installed long guide post, retainer fixed plate respectively in the two sides of retainer fixed plate The long guide post of two sides is corresponded with the guide post through-hole at retainer guide pillar seat both ends respectively, and activity penetrates retainer and leads each long guide post respectively Corresponding guide post through-hole on column base, two-part retainer oil cylinder can drive retainer fixed plate to move up and down, when First piston bar is upward When elongation can pushing tow second piston bar extend upwards, until when First piston bar is fully extended, the second piston that is raised at this time Bar can make retainer carrying roller reach the first retainer station, and the retainer carrying roller for reaching the first retainer station can smoothly be held by feeder Structure conveys the tubing to be processed positioned at lower station to come；When second piston bar extend upwards until its it is fully extended when, at this time Fully extended second piston bar can make retainer carrying roller reach the second retainer station, reach the retainer carrying roller energy of the second retainer station It smoothly holds and the tubing to be processed positioned at upper station to come is conveyed by feeding mechanism；Second piston bar and First piston bar to Retainer carrying roller can be made to leave the second retainer station or the first retainer station when lower retraction；It is arranged in the rack at material carrying mechanism rear There is the strong retaining device that zero-bit positioning can be carried out to tubing to be processed.

2. the positioning of tubing zero-bit and double-station material-supporting device in bending machine according to claim 1, it is characterised in that: institute The structure for the strong retaining device stated includes: to be fixedly installed mounting rack on the rack, and strong gear cylinder is vertically arranged on mounting rack, The piston rod of strong gear cylinder is downward and is connected with mounting base, is provided on the rear end face of mounting base and the control in bending machine fills Set electric signal connection close to switch, one block baffle is hinged with by a shaft in the rear end of mounting base, baffle rotates forward Can touching close to switch, be additionally provided with elastic parts in mounting base, baffle can be under the outside elastic force effect of elastic parts After rotate and leave close to switch, when the piston rod of gear cylinder by force extends downwardly, can drive baffle be displaced downwardly to can stop to Processing tubing continues the position conveyed forward, in this way, conveying in feeding mechanism into bending machine front end bend pipe mould to be processed During tubing, tubing to be processed can strike baffle, and the elastic force for making baffle overcome elastic parts outside and rotate forward, Until being resisted against on the rear end face of mounting base, tubing to be processed is just lived by baffle and is located at null positions at this time, herein mistake Baffle can just be touched close to switch in journey, will send zero signal to control device close to switch.

3. the positioning of tubing zero-bit and double-station material-supporting device in bending machine according to claim 2, it is characterised in that: institute The structure for the elastic parts stated includes: the limiting slot that rear end opening is provided in mounting base, is movably set in limiting slot First block, the screw rod of stay bolt from the front to the back protrude into limiting slot and be mutually fixedly connected with the first block by activity, in limiting slot It is additionally provided with strong gear spring, the strong both ends for keeping off spring bear against the slot bottom of the first block and limiting slot, and the strong spring that keeps off makes the One block has to move backward along limiting slot and baffle is pushed to rotate backward always leaves the trend of close switch.

4. the positioning of tubing zero-bit and double-station material-supporting device in bending machine according to claim 3, it is characterised in that: First blend stop of circle is forward extended out on the front end face of first block, the strong rear end for keeping off spring extend into what the first blend stop was surrounded In first locating slot.

5. the positioning of tubing zero-bit and double-station material-supporting device in bending machine according to claim 3, it is characterised in that: long The connection type that bolt is mutually fixedly connected with the first block are as follows: threaded hole is provided on the first block, stay bolt is threaded through spiral shell It is threadedly coupled in pit and with the first block.

6. the positioning of tubing zero-bit and double-station material-supporting device in bending machine according to claim 4, it is characterised in that: It is additionally provided with the second block in limiting slot, is stretched out backward on the rear end face of the second block and is provided with second blend stop of circle, it is strong to keep off The front end of spring is extend into the second positioning groove that the second blend stop is surrounded.

7. the positioning of tubing zero-bit and double-station material-supporting device in bending machine according to claim 3, it is characterised in that: Screw rod between the front end face and stay bolt head of mounting base is equipped with stop nut.

8. the positioning of tubing zero-bit and double-station material-supporting device, feature in bending machine according to claim 2 or 3 exist In: setting is there are two support through holes on mounting rack, and two support through holes are located at the two sides of strong gear cylinder, in mounting base Two sides are fixedly installed one strong gear guide post respectively, and strong gear of two support through holes respectively with mounting base two sides on mounting rack is led Column corresponds, and every strong gear guide post upward activity from the support through holes of respective side is pierced by.

9. the positioning of tubing zero-bit and double-station material-supporting device in bending machine according to claim 1 or 2 or 3, feature It is: the connection type of retainer carrying roller and retainer fixed plate are as follows: be respectively arranged with roller seat, retainer support at the both ends of retainer carrying roller Roller is rotatably arranged on two roller seats, is connected with adjusting screw rod in the bottom of each roller seat, adjusting screw rod with Retainer fixed plate is threadedly coupled.