CN113210905A

CN113210905A - Laser pipe cutting chuck

Info

Publication number: CN113210905A
Application number: CN202110632461.0A
Authority: CN
Inventors: 牟燕峰; 钟德峰
Original assignee: Changzhou Biyoute Machinery Technology Co ltd
Current assignee: Changzhou Biyoute Machinery Technology Co ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-08-06

Abstract

The utility model relates to a laser pipe cutting chuck, relate to the chuck field, including the chuck body, the centre bore has been seted up on the chuck body, be equipped with the clamping device who is used for the centre gripping pipe fitting on the chuck body, clamping device is including sliding the supporting rod of connection on the chuck body and being used for driving the supporting rod gliding actuating mechanism relative or back of the body mutually, it is connected with the switching-over piece all to rotate to lie in one side that the centre bore was kept away from to same two supporting rods on the chuck body, all be equipped with flexible connector on every switching-over piece, flexible connector one end and one of them supporting rod fixed connection, the flexible connector other end is around behind corresponding switching-over piece with another supporting rod fixed connection. Under the drive of switching-over piece and flexonics spare, can stimulate each other when two supporting rods are relative or back of the body mutually slip to ensure that two supporting rods can be in synchronous motion's state all the time, effectively improved the synchronism of same pair of clamping rod at the in-process that slides, improved the machining precision of pipe fitting.

Description

Laser pipe cutting chuck

Technical Field

The application relates to the field of chucks, in particular to a laser pipe cutting chuck.

Background

Laser cutting has been widely used in various industrial fields as a fast and efficient processing method. The laser cutting machine is a device for cutting by using laser beams, and mainly comprises a laser generator, a beam expander, a focusing lens, a workbench and a clamping device.

When utilizing laser cutting pipe fitting, in order to promote the cutting accuracy of pipe fitting, need fix the pipe fitting of waiting to cut on air chuck earlier, independent work between each cylinder of current air chuck, because the problem of machining accuracy, the relative perpendicular synchronous motion of the clamping rod that hardly guarantees several cylinder connections leads to when the centre gripping, and each clamping rod can't ensure that the pipe fitting is put by the centre gripping at air chuck's central point to the machining error that leads to the pipe fitting is big.

Disclosure of Invention

In order to solve the relatively poor problem of synchronism between each clamping rod, the application provides a laser pipe cutting chuck.

The application provides a laser pipe cutting chuck adopts following technical scheme:

the utility model provides a laser pipe cutting chuck, includes the chuck body, set up the centre bore that supplies the pipe fitting to pass on the chuck body, be equipped with the clamping device who is used for the centre gripping pipe fitting on the chuck body, clamping device is including sliding at least two pairs of supporting rod of connection on the chuck body and being used for driving every the relative or gliding actuating mechanism back of the body mutually of supporting rod, it all is connected with the switching-over piece, every all to lie in one side that the centre bore was kept away from to same two supporting rods on the chuck body flexible connecting piece, flexible connecting piece one end and one of them supporting rod fixed connection, the flexible connecting piece other end is walked around behind the corresponding switching-over piece with another supporting rod fixed connection.

Through adopting above-mentioned technical scheme, because every to the supporting rod can correspond and set up two at least switching-over pieces and flexonics spare, like this when same pair of clamping rod is relative or when carrying on the back mutually and slide, under flexonics spare's drive, two supporting rods can stimulate mutually to ensure that same pair of two supporting rods can be in synchronous motion's state all the time, effectively improved the synchronism of same pair of clamping rod at the in-process that slides, and then ensure that the pipe fitting can be put by the centre gripping at the central point of chuck, improved the machining precision of pipe fitting.

Preferably, each pair of clamping rods on the chuck body is correspondingly provided with two reversing pieces, and the two reversing pieces are respectively arranged on the diagonal directions of the same pair of clamping rods.

Through adopting above-mentioned technical scheme, two switching-over pieces set up respectively on the diagonal angle direction of same pair of clamping rod, and two switching-over pieces and flexonics spare cooperate each other, all can play the effect of synchronous connection when two clamping rods of same pair are close to each other or keep away from. The two reversing pieces and the flexible connecting piece are respectively arranged at the opposite angles of the same pair of clamping rods, the positions of the reversing pieces and the flexible connecting piece are distributed evenly, and the installation and the disassembly are very convenient.

Preferably, each pair of clamping rods on the chuck body is correspondingly provided with three reversing pieces, two of the reversing pieces are respectively arranged in the diagonal direction of the same pair of clamping rods, and the other reversing piece is arranged at one end of one clamping rod, which is not provided with a reversing piece.

By adopting the technical scheme, the three reversing pieces are arranged, the two reversing pieces and the flexible connecting piece in the opposite angle direction play a main synchronous role when the same pair of clamping rods slide, and the other reversing piece can play a compensation function, so that the sliding process of the two clamping rods is more stable.

Preferably, each pair of clamping rods on the chuck body is correspondingly provided with four reversing pieces, and the four reversing pieces are respectively arranged at four corners of the same pair of clamping rods.

Through adopting above-mentioned technical scheme, in same pair of clamping rod, the tip of every clamping rod all is equipped with a switching-over piece, and two switching-over pieces and two flexible connectors that are located the clamping rod both ends like this both can play the synchronization when the clamping rod is close to each other, also can play the synchronization when the clamping rod keeps away from each other, and the clamping rod is at the synchronous slip in-process, and the atress of two clamping rods is more even, and the life of clamping rod is longer.

Preferably, the flexible connecting piece is a chain, a steel wire rope or a belt, and the reversing piece is a chain wheel matched with the chain, a pulley matched with the steel wire rope or a belt wheel matched with the belt.

By adopting the technical scheme, the chain, the steel wire rope and the belt are adopted as the flexible connecting piece, the maintenance and the installation are very convenient, the allowable machining error is large during the assembly, the machining precision requirement of each part can be reduced, the production cost can be effectively reduced, and the production efficiency is improved.

Preferably, a pull rod is arranged between the flexible connecting piece and the clamping rod, one end of the pull rod is connected with the clamping rod far away from the reversing piece, the other end of the pull rod is fixedly connected with the flexible connecting piece, and an adjusting mechanism used for tensioning the flexible connecting piece is arranged between the pull rod and the clamping rod.

By adopting the technical scheme, the flexible connecting piece can be always in a tightening state by arranging the adjusting mechanism, so that the stability of the clamping rods in the sliding process is ensured.

Preferably, one end of the pull rod is connected with the corresponding clamping rod in a sliding mode, the adjusting mechanism comprises an elastic piece arranged between the pull rod and the corresponding clamping rod, and the elastic piece is used for driving the pull rod to slide towards the clamping rod connected with the pull rod in a sliding mode.

Through adopting above-mentioned technical scheme, the elastic component drive pull rod slides towards the supporting rod that slides and be connected with the pull rod, and under the drive of elastic component, pull rod pulling flexible connecting piece is in the state of tightening all the time to avoid because flexible connecting piece is not hard up to lead to the uneven problem of atress to appear in the supporting rod slip in-process.

Preferably, an adjusting bolt is arranged at one end of the pull rod, the adjusting bolt penetrates through the clamping rod and then is in threaded connection with the pull rod, the elastic part comprises a spring sleeved on the adjusting bolt, one end of the spring is abutted to the screw head of the adjusting bolt, and the other end of the spring is abutted to the clamping rod.

Through adopting above-mentioned technical scheme, under spring and adjusting bolt's cooperation, can drive the pull rod and slide to realize the tensioning of flexonics spare, and adopt adjusting bolt to realize the installation of spring, the installation and the dismantlement of spring are very convenient.

Preferably, be equipped with two pairs of supporting rods on the chuck body, the slip direction mutually perpendicular of two pairs of supporting rods, the supporting rod includes the slider of being connected with the chuck body slides, and is every right fixedly connected with wheel carrier on the relative side of slider, rotate on the wheel carrier and be connected with the butt wheel.

Through adopting above-mentioned technical scheme, when the centre gripping, butt wheel and pipe fitting butt, the pipe fitting can be followed centre bore axis direction and slided this moment, saw cuts when one section of pipe fitting and finishes the back, can slide along centre bore axis direction by the direct drive pipe fitting, stretches out the chuck body again with the pipe fitting can to needs length.

Preferably, the chuck body is fixedly connected with guide rods at two ends of each pair of clamping rods, and two ends of the sliding block are connected with the guide rods in a sliding manner.

Through adopting above-mentioned technical scheme, through setting up the guide arm at the both ends of slider, the guide arm can play the guide effect in the slip in-process of slider, can effectively improve the stability of slider slip process.

Preferably, the driving mechanism comprises a driving cylinder fixedly arranged on the chuck body, the driving cylinder is arranged corresponding to the sliding block, and a piston rod of the driving cylinder is connected with the sliding block.

By adopting the technical scheme, the driving cylinder is adopted as the driving source of the clamping rod, the structure is simple, the work is reliable, and the installation and the maintenance are very convenient.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the reversing piece and the flexible connecting piece, the synchronism of the same pair of clamping rods in the reciprocating sliding process can be realized, and the clamping precision of the pipe fitting is further improved;

2. through setting up adjustment mechanism can be so that flexible connection spare is in the tensioning state all the time, ensures the atress equilibrium of supporting rod, improves the centre gripping effect of supporting rod.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a clamping device according to an embodiment of the present application.

Fig. 3 is a schematic view of the drive mechanism installation of the embodiment of the present application.

FIG. 4 is a schematic view of the installation of the clamping bar according to the first embodiment of the present application (the clamping bar is shown as being horizontally disposed).

FIG. 5 is a schematic view of the installation of the clamping bar according to the second embodiment of the present application (the clamping bar is shown in a vertical configuration).

Description of reference numerals: 1. a chuck body; 11. a central bore; 2. a clamping rod; 21. a slider; 211. an open slot; 22. a wheel carrier; 221. a butting wheel; 3. a drive mechanism; 31. a driving cylinder; 4. a guide bar; 41. a rod seat; 5. a reversing member; 51. a flexible connector; 6. a pull rod; 61. adjusting the bolt; 62. a spring; 7. connecting blocks; 8. a shaft seat; 9. and (4) connecting the blocks.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The first embodiment is as follows:

the embodiment of the application discloses laser pipe cutting chuck. Referring to fig. 1, a laser pipe cutting chuck includes chuck body 1, and chuck body 1 passes through the fixed setting on laser cutting machine of base, is equipped with centre bore 11 at the center of chuck body 1, and centre bore 11 runs through chuck body 1, and centre bore 11 is used for supplying the pipe fitting to pass chuck body 1, is equipped with the clamping device who is used for the centre gripping pipe fitting on chuck body 1, and the pipe fitting passes through clamping device to be fixed in centre bore 11 to it is fixed to realize the clamping of pipe fitting on laser cutting machine.

Referring to fig. 2, the clamping device includes at least two pairs of clamping rods 2 slidably connected to the chuck body 1 and a driving mechanism 3 for driving each pair of clamping rods 2 to slide oppositely or back to back, the two clamping rods 2 of the same pair are arranged in parallel, and all the clamping rods 2 surround the central hole 11. In this embodiment, the logarithm of supporting rod 2 is two pairs, and the slip direction mutually perpendicular of two pairs of supporting rod 2 sets up, for convenient the description, one of them pair of supporting rod 2 slides along the horizontal direction, and another pair of supporting rod 2 slides along vertical direction, and four supporting rod 2 become the groined type and distribute on chuck body 1, and same pair of supporting rod 2 is in same vertical plane, and the supporting rod 2 place plane that slides along the horizontal direction is parallel to each other and staggers the setting with the supporting rod 2 place plane that slides along vertical direction.

During operation, two 2 relative sliding of clamping rod that actuating mechanism 3 drive is parallel to each other until with the pipe fitting butt to fix the pipe fitting on chuck body 1, not only can realize the centre gripping that the cross-section is circular shape pipe fitting, also can realize the centre gripping that the cross-section is square or oval-shaped pipe fitting, the range of application is wide.

Referring to fig. 3, in order to improve the pipe cutting efficiency, the clamping rod 2 includes a slider 21 connected to the chuck body 1 in a sliding manner, an open slot 211 is provided on a side surface of each pair of sliders 21 opposite to each other, a wheel carrier 22 is fixedly connected to an inner wall of the open slot 211, the wheel carrier 22 is disposed in a U shape, a middle portion of the wheel carrier 22 is fixedly connected to the slider 21, a butting wheel 221 is rotatably connected to the wheel carrier 22, and a rotation axis of the butting wheel 221 is perpendicular to an axis of the central hole 11 and is disposed along a length direction of the slider 21. When the centre gripping, butt wheel 221 and pipe fitting butt, the pipe fitting can slide along 11 axis directions of centre bore this moment, saw cuts when the pipe fitting one section and finishes, can directly drive the pipe fitting and slide along 11 axis directions of centre bore, stretch out the chuck body 1 again with the pipe fitting can to needs length.

Referring to fig. 3, in order to improve the stability of the pipe during the clamping process, in this example, two wheel frames 22 are arranged on each sliding block 21, one wheel frame 22 is arranged in the opening groove 211, the other wheel frame 22 is arranged on the side surface of the wheel frame 22 located in the opening groove 211, and the butting wheels 221 on the two wheel frames 22 are arranged in parallel, so that two butting wheels 221 on each clamping rod 2 contact the pipe, the contact area between the pipe and the clamping rod 2 can be increased, the coaxiality between the pipe and the central hole 11 during the clamping process is ensured, and the stability of the pipe during the clamping process is improved.

For the stability that improves slider 21 sliding process on chuck body 1, the both sides that lie in 11 horizontal directions of centre bore and the both sides of vertical direction on chuck body 1 all are equipped with guide arm 4, guide arm 4 both ends are equipped with rod seat 41, rod seat 41 and chuck body 1 fixed connection, the setting of staggering along the plane of guide arm 4 place that the horizontal direction set up and the plane of guide arm 4 place that sets up along vertical direction, the slider 21 both ends that slide along the horizontal direction slide respectively with the guide arm 4 of the horizontal setting that corresponds slide and be connected, the slider 21 both ends that slide along vertical direction slide respectively with the guide arm 4 of the vertical setting that corresponds slide and be connected.

Through setting up guide arm 4 at the both ends of slider 21, can effectively improve the stability of slider 21 process of sliding, simultaneously because the supporting rod 2 that the level slided and the supporting rod 2 of vertical sliding stagger the setting, all supporting rods 2 all can slide to the central point of centre bore 11 like this and put, effectively improve clamping device's centre gripping scope.

Referring to fig. 3, for conveniently driving the clamping rod 2 to slide, the driving mechanism 3 includes the driving cylinder 31 fixedly arranged on the chuck body 1, the driving cylinder 31 is arranged corresponding to the clamping rod 2, the piston rod of the driving cylinder 31 is arranged along the horizontal direction or the vertical direction, four driving cylinders 31 are arranged oppositely, two pairs of the driving cylinders 31 are arranged on one side of the corresponding slider 21 far away from the center hole 11, the piston rod of the driving cylinder 31 is connected with the middle part of the corresponding slider 21, and under the four driving cylinders 31, the four clamping rods 2 can be driven to slide on the chuck body 1.

Referring to fig. 4, taking a pair of clamping rods 2 sliding in a horizontal direction as an example, in order to ensure the synchronism of the same pair of clamping rods 2 in the sliding process, a reversing member 5 is rotatably connected to the chuck body 1, the rotation axis of the reversing member 5 is parallel to the axis of the central hole 11, the reversing member 5 is rotatably connected to the chuck body 1 through a shaft seat 8, the reversing member 5 is disposed on one side of each of the pair of clamping rods 2 away from the central hole 11, a flexible connecting member 51 is further wound on each of the reversing members 5, one end of each of the flexible connecting members 51 is fixedly connected to one end of one of the clamping rods 2, and the other end of each of the flexible connecting members 51 is fixedly connected to the other end of the other clamping rod 2 by passing around the reversing member 5.

Because every to holding rod 2 can correspond and set up two at least switching-over pieces 5 and flexonics spare 51, like this when same pair holding rod 2 is relative or when carrying on the back mutually slip, under the drive of switching-over piece 5 and flexonics spare 51, two holding rod 2 can all stimulate mutually when carrying on the back mutually and sliding relatively, thereby ensure that two holding rod 2 can be in synchronous motion's state all the time, the synchronism of same pair holding rod 2 at the in-process that slides has effectively been improved, and then ensure that the pipe fitting can be put by the centre gripping at the central point of chuck, the machining precision of pipe fitting has been improved.

In this embodiment, the number of the reversing members 5 corresponding to each pair of the clamping rods 2 is two, and the two reversing members 5 are respectively arranged in the diagonal direction of the same pair of the clamping rods 2, and in this embodiment, the two reversing members 5 are arranged in central symmetry with respect to the central hole 11. The two reversing pieces 5 and the flexible connecting piece 51 are respectively arranged at two ends of the clamping rod 2, the positions are distributed evenly, and the installation and the disassembly are very convenient.

In order to facilitate the production and installation of the flexible connecting member 51, the flexible connecting member 51 may be a chain, a steel wire rope or a belt, and the reversing member 5 may be a sprocket engaged with the chain, a pulley engaged with the steel wire rope or a belt pulley engaged with the belt. In this embodiment, flexible connection spare 51 chooses for use the chain, and switching-over piece 5 is for the sprocket with chain complex, and all sprocket parameters are equal, chooses for use the chain as flexible connection spare 51, and the transmission process of chain and sprocket is very steady and long service life.

Referring to fig. 4, after the chain is used for a period of time, a loosening phenomenon can occur between each chain link of the chain, in order to ensure that the chain is always in a tightened state, a pull rod 6 is arranged between the chain and the clamping rod 2, the pull rod 6 is arranged in parallel with the guide rod 4, one end of the pull rod 6 is connected with the side face of the sliding block 21 far away from the chain wheel, the other end of the pull rod 6 is fixedly connected with the chain, an adjusting mechanism for tensioning the chain is arranged between the pull rod 6 and the clamping rod 2, and one end of the chain far away from the pull rod 6 bypasses the chain wheel and then is fixedly connected with the back face of the sliding block 21 through the connecting block 9.

Referring to fig. 4, for conveniently realizing the chain tensioning, 6 one end of pull rod with correspond the supporting rod 2 and slide and be connected, adjustment mechanism is including setting up at pull rod 6 and the elastic component that corresponds between supporting rod 2, elastic component drive pull rod 6 slides towards the supporting rod 2 of being connected that slides with pull rod 6, under the drive of elastic component, 6 pulling chains of pull rod are in the state of tightening all the time to avoid because the not hard up uneven problem of atress appears in the slip in-process in supporting rod 2 that leads to of chain.

For conveniently realizing the installation of elastic component, refer to fig. 4, be equipped with adjusting bolt 61 in pull rod 6 one end, adjusting bolt 61 sets up along pull rod 6 length direction, both ends at slider 21 length direction are equipped with connecting block 7, be equipped with the through-hole that the screw rod that supplies adjusting bolt 61 passed on connecting block 7, adjusting bolt 61 passes behind connecting block 7 with the 6 tip threaded connection of pull rod, for the fixed effect that improves adjusting bolt 61 and pull rod 6, threaded connection has the nut that can with the 6 tip butts of pull rod on adjusting bolt 61. The elastic part comprises a spring 62 sleeved on the adjusting bolt 61, one end of the spring 62 is abutted to the screw head of the adjusting bolt 61, and the other end of the spring is abutted to the connecting block 7. By rotating the adjusting bolt 61, the length of the adjusting bolt 61 extending out of the pull rod 6 is controlled, so that the spring 62 is always in a compressed state, and the tensioning of the chain is realized.

The implementation principle of the laser pipe cutting chuck in the embodiment of the application is as follows: when a pipe fitting in the central hole 11 is clamped, the piston rods of the four driving cylinders 31 extend out to drive each clamping rod 2 to slide towards the central hole 11, each clamping rod 2 can be ensured to synchronously slide under the driving of the corresponding chain and the corresponding chain wheel, and when the butting wheels 221 on the clamping rods 2 are butted with the pipe fitting, the clamping and fixing of the pipe fitting can be realized; when the clamping device is loosened, the piston rod of the driving cylinder 31 retracts to drive each clamping rod 2 to be far away from the central hole 11, and synchronous retreating of each clamping rod 2 can be realized under the driving of the corresponding chain and the corresponding chain wheel.

Example two:

the difference with embodiment one lies in, refer to fig. 5, take a pair of clamping rod 2 that slides to vertical along water as an example, every number of switching-over piece 5 that clamping rod 2 corresponds is four, four switching-over pieces 5 set up the four corners department at same pair of clamping rod 2 respectively, in this embodiment, four switching-over pieces 5 are two liang of central symmetry setting about centre bore 11, in same pair of clamping rod 2, the tip of every clamping rod 2 all is equipped with a switching-over piece 5, two switching-over pieces 5 and two flexible connectors 51 that are located clamping rod 2 both ends like this both can play the synchronization action when clamping rod 2 is close to each other, also can play the synchronization action when clamping rod 2 is kept away from each other, clamping rod 2 is in the synchronous slip in-process, the atress of two clamping rod 2 is more even, clamping rod 2's life is longer.

In order to avoid interference, the reversing pieces 5 on the same diagonal line are arranged in a staggered manner with the planes of the reversing pieces 5 on the same vertical plane and different diagonal lines. And in order to save space, the lever seat 41 is arranged between the commutator 5 and the slider 21 without contacting the flexible connecting member 51.

Example three:

in this embodiment, each pair of clamping rods 2 on the chuck body 1 is correspondingly provided with three reversing pieces 5, and the three reversing pieces 5 are respectively arranged at any three corners of the same pair of clamping rods 2. The two reversing pieces 5 are respectively arranged in the diagonal direction of the same pair of clamping rods 2, the two reversing pieces 5 positioned at the diagonal play a main synchronization role, and the reversing pieces 5 positioned at the same diagonal and the flexible connecting piece 51 are positioned in the same plane; the other reversing piece 5 is arranged at one end of one clamping rod 2, which is not provided with the reversing piece 5, and the plane where the other reversing piece 5 is arranged is staggered with the other two reversing pieces 5, so that the auxiliary function is mainly realized.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a laser pipe cutting chuck, includes chuck body (1), set up centre bore (11) that supply the pipe fitting to pass on chuck body (1), be equipped with the clamping device who is used for the centre gripping pipe fitting on chuck body (1), clamping device is including sliding at least two pairs of supporting rod (2) of connection on chuck body (1) and being used for driving every supporting rod (2) relative or gliding actuating mechanism (3) back on the back mutually, its characterized in that: one side that centre bore (11) were kept away from in same two supporting rods (2) of a pair of on chuck body (1) all is connected with switching-over piece (5), every all be equipped with flexible connector (51) on switching-over piece (5), flexible connector (51) one end and one of them supporting rod (2) fixed connection, flexible connector (51) other end is walked around behind corresponding switching-over piece (5) and another supporting rod (2) fixed connection.

2. The laser pipe cutting chuck according to claim 1, wherein: every pair of clamping rod (2) is correspondingly equipped with two switching-over pieces (5) on the chuck body (1), two switching-over pieces (5) set up respectively in the diagonal direction of same pair of clamping rod (2).

3. The laser pipe cutting chuck according to claim 1, wherein: every pair of clamping rod (2) on chuck body (1) corresponds and is equipped with three switching-over piece (5), wherein two switching-over piece (5) set up respectively in the diagonal direction of same pair of clamping rod (2), another switching-over piece (5) set up the one end that does not set up switching-over piece (5) in one of them clamping rod (2).

4. The laser pipe cutting chuck according to claim 1, wherein: every pair of clamping rod (2) on chuck body (1) corresponds and is equipped with four switching-over pieces (5), four switching-over pieces (5) set up respectively in the four corners department of same pair of clamping rod (2).

5. The laser pipe cutting chuck as claimed in claim 1, 2, 3 or 4, wherein: the flexible connecting piece (51) is a chain, a steel wire rope or a belt, and the reversing piece (5) is a chain wheel matched with the chain, a pulley matched with the steel wire rope or a belt wheel matched with the belt.

6. The laser pipe cutting chuck according to claim 1, wherein: be equipped with pull rod (6) between flexible connectors (51) and supporting rod (2), pull rod (6) one end is connected with supporting rod (2) of keeping away from switching-over piece (5), pull rod (6) other end and flexible connectors (51) fixed connection, be equipped with the adjustment mechanism who is used for tensioning flexible connectors (51) between pull rod (6) and supporting rod (2).

7. The laser pipe cutting chuck according to claim 6, wherein: pull rod (6) one end with correspond supporting rod (2) and slide and be connected, adjustment mechanism is including setting up at pull rod (6) and correspond the elastic component between supporting rod (2), the elastic component is used for driving pull rod (6) to slide towards supporting rod (2) of being connected with pull rod (6) are slided.

8. The laser pipe cutting chuck as claimed in claim 7, wherein: pull rod (6) one end is equipped with adjusting bolt (61), adjusting bolt (61) pass behind clamping rod (2) with pull rod (6) threaded connection, spring (62) on adjusting bolt (61) are established including the cover to the elastic component, the spiral shell head butt of spring (62) one end and adjusting bolt (61), the spring (62) other end and clamping rod (2) butt.

9. The laser pipe cutting chuck according to claim 1, wherein: be equipped with two pairs of supporting rod (2) on the chuck body (1), the direction mutually perpendicular of sliding of two pairs of supporting rod (2), supporting rod (2) are including sliding slider (21) of being connected with chuck body (1), and are every right fixedly connected with wheel carrier (22) on the relative side of slider (21), it is connected with butt wheel (221) to rotate on wheel carrier (22).

10. The laser pipe cutting chuck as claimed in claim 9, wherein: the clamping device is characterized in that guide rods (4) are fixedly connected to the two ends of each pair of clamping rods (2) on the chuck body (1), and the two ends of the sliding block (21) are connected with the corresponding guide rods (4) in a sliding mode.

11. The laser pipe cutting chuck as claimed in claim 9, wherein: the driving mechanism (3) comprises a driving cylinder (31) fixedly arranged on the chuck body (1), the driving cylinder (31) is arranged corresponding to the sliding block (21), and a piston rod of the driving cylinder (31) is connected with the sliding block (21).