CN211027658U

CN211027658U - Flexible clamp for thin-wall bent pipe with spatial curve axis

Info

Publication number: CN211027658U
Application number: CN201922017194.7U
Authority: CN
Inventors: 李宇; 李凌博; 罗大兵; 余伍林; 田佳鑫
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-07-17
Anticipated expiration: 2029-11-20

Abstract

The utility model discloses a flexible clamp that is used for axis to be curved thin wall return bend in space, including the anchor clamps main part, the anchor clamps main part is including the subassembly of setting up that is used for the centre gripping return bend, set up the subassembly including setting up the main part, with set up the main part and can dismantle the flexible fastening piece of being connected, still including being used for the drive to set up main part pivoted slewing mechanism, being used for will setting up the fixed establishment of return bend of main part and flexible fastening piece parcel, fixed establishment installs in setting up the main part. The method of pressing the bent pipe by the chain is adopted, the binding face with the surface of the bent pipe is increased, the damage to the surface of the bent pipe is reduced, the bent pipes with different diameters can be conveniently fixed, and the chain can be fastened for disassembly. The centering mechanism is provided with a driving motor, and the supporting part on the centering mechanism can be gradually expanded into the required diameter size through controlling the motor, so that the supporting part is attached to the inner wall of the bent pipe, the two ends of the bent pipe are fixed, and the shaking of the two ends of the bent pipe is reduced.

Description

Flexible clamp for thin-wall bent pipe with spatial curve axis

Technical Field

The utility model relates to an anchor clamps technical field, concretely relates to flexible fixture that is used for axis to be space curve's thin wall return bend.

Background

In the fields of transportation such as ships, automobiles, airplanes and the like and the fields of petroleum, natural gas and chemical equipment and the like, bent pipes with spatial curves of various axes can be used for fuel oil transportation and gas transportation. In the modern mechanical industry, bent pipes can be fastened in the processes of hole cutting, welding, flange mounting and the like of the bent pipes, particularly, the clamping and fastening of the bent pipes with spatial curves and thin wall thicknesses are always a technical problem, a traditional bent pipe clamp can only clamp one type of bent pipe, and the types of the bent pipes are more, so that the types of the clamp are huge. Patent application No. 201210084935.3 discloses a "bent pipe anchor clamps whose axis is space curve", this patent is as supporting through the anchor clamps main part of a cell type, be equipped with a plurality of screw rods in the anchor clamps main part, the V-arrangement dop is equipped with on the screw rod, the horizontal position can be adjusted through adjusting screw to the screw rod in the anchor clamps main part, at first put into the anchor clamps main part of cell type to the return bend, according to the position structure of the different sections of return bend, adjusting screw adjusts the horizontal position of good screw rod earlier, rotatory screw rod again, guarantee the upper and lower position of the V-arrangement dop on each group of screw rod, lock the position of screw rod through the principle of two nut butt locking at last, reach the fixed to the return bend with this. However, the clamp structure is time-consuming and labor-consuming through manual screw adjustment, the number of the binding surfaces of the V-shaped clamping heads and the surfaces of the bent pipes is too small, the thin-wall pipes are not favorably fixed, and meanwhile, the bent pipes are placed into the groove-shaped clamp body, so that too much space is shielded, and the subsequent processing is not favorably carried out. At present, the centre gripping of U-shaped and V-arrangement commonly used is limited with the structure pressure surface of setting up, and is few with the binding face of return bend, in order to guarantee that the centre gripping firmly increases clamping-force, can cause great damage to the thinner return bend surface of wall thickness, and current return bend anchor clamps generally still are traditional anchor clamps, and adaptability is poor, the unicity is outstanding.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flexible clamp that is used for axis to be the thin wall return bend of space curve, the technical problem of solution is the return bend of traditional return bend anchor clamps mostly can only centre gripping a model, and the suitability is poor, the unicity is outstanding, realizes pressing from both sides the return bend of tight different models, and the return bend surface is not damaged to the centre gripping mode, and the centre gripping is firm.

The utility model discloses a following technical scheme realizes:

a flexible clamp for a thin-wall elbow of which the axis is a space curve comprises a clamp body, wherein the clamp body comprises a fastening assembly for clamping the elbow, the fastening assembly comprises a fastening body, a flexible fastening piece detachably connected with the fastening body, a rotating mechanism for driving the fastening body to rotate, and a fixing mechanism for fixing the fastening body and the elbow wrapped by the flexible fastening piece, and the fixing mechanism is mounted on the fastening body.

Aiming at the problems that most of the existing elbow pipe clamps can only clamp one type of elbow pipe, the adaptation shape is poor, the singleness is outstanding, and the elbow pipe clamps are various. The utility model provides a flexible clamp that is used for axis to be curved thin wall return bend in space, including the anchor clamps main part, the anchor clamps main part is including the subassembly of setting up that is used for the centre gripping return bend, set up the subassembly including setting up the main part, with set up the main part and can dismantle the flexible fastening piece of being connected, still including being used for the drive to set up main part pivoted slewing mechanism, being used for will setting up the fixed establishment of return bend of main part and flexible fastening piece parcel, fixed establishment installs in setting up the main part. The fastening assembly is used for fixing the bent pipe, the axis of the workpiece is a space curve, and the existing clamp faces the bent pipe part at different positions, so that the clamping effect is limited. The rotating mechanism can realize the rotation of the fastening main body, and the fastening main body can meet the bent pipes at different positions on a horizontal plane. The flexible fastening piece is detachably connected with the fastening main body, the flexible fastening piece and the fastening main body form a circular ring, the flexible fastening piece is a flexible connecting piece, the flexible fastening piece can adjust the posture of the flexible fastening piece according to bent pipes of different specifications, the contact surface between the flexible fastening piece and the bent pipe is increased, and damage to the thin-wall bent pipe is reduced.

Preferably, the rotating mechanism comprises a rotating motor and a rotating motor support, the rotating motor is installed at the lower end of the rotating motor support, an output shaft of the rotating motor penetrates through the rotating motor support, and the output shaft of the rotating motor is connected with the bottom of the fastening main body. The rotating motor support can be a U-shaped structure, ear seats are arranged on two sides of the opening end of the U-shaped structure, the ear seats are used for fixing the rotating motor support with the outer side of the U-shaped structure, the rotating motor is located in the U-shaped structure, and the output shaft of the rotating motor penetrates through the closed end of the U-shaped structure.

Preferably, the flexible fastener is a chain, and both ends of the chain are mounted on the top of the fastening body by pins. Furthermore, the flexible fastening piece can also be an iron chain, and a rubber sleeve can be sleeved on the flexible fastening piece in order to prevent the bent pipe from being damaged.

Preferably, the fixing mechanism comprises a fixing screw rod and a fixing nut, one end of the fixing screw rod is matched with the fixing nut, the other end of the fixing screw rod penetrates through the fastening body, and the fixing screw rod is in threaded fit with the fastening body. The fixing screw pushes the bent pipe upwards from the lower part of the fastening main body to fix the bent pipe.

Preferably, an arc-shaped groove is formed in the end portion, facing one end of the flexible fastening piece, of the fixing screw, and the central angle corresponding to the arc-shaped groove is 15-90 degrees. The application object of the application is the elbow, and if the contact surface of the fixing screw and the elbow is a plane, the direction of the clamping force may not be in the axial direction of the fixing screw, an arc-shaped groove is arranged at the end part of one end of the fixing screw, which is in contact with the elbow, the end surface of the fixing screw is used as the arc-shaped groove, and the central angle corresponding to the arc-shaped groove is preferably 20 degrees, 25 degrees and 45 degrees.

Preferably, the fastening body is of a "Y" shaped configuration. The flexible fastener of cooperation of being convenient for to and the rotation of the main part is set up in the realization, the upper end of setting up the main part can be V type structure, and the lower extreme of setting up the main part can be the type of falling U structure, and the open end of U type structure is down, and the blind end and the V type structural connection of U type structure, and the junction of U type and V type is opened has the screw hole, the screw hole cooperates with clamping screw, and fixation nut is located U type structure, and a flat board is connected to the open end again, dull and stereotyped and the output shaft who rotates the motor.

Preferably, the clamp main body further comprises a clamp base, a screw rod sliding platform and a lifting platform, wherein the screw rod sliding platform is in rolling connection with the clamp base, the screw rod sliding platform comprises a screw rod, a screw rod sliding table in screw connection with the screw rod, a screw rod coupler connected with one end of the screw rod, a motor coupler connected with the screw rod coupler, a screw rod bearing seat, an X-direction slide rail, a Y-direction guide rail mounting base and a driving roller, the X-direction slide rail is arranged on the clamp base, two ends of the screw rod are respectively provided with a screw rod bearing block, the screw rod bearing blocks are arranged on the top surface of the Y-direction guide rail mounting base, the screw rod bearing block is positioned in the middle of the top surface of the Y-direction guide rail mounting base, the Y-direction guide rail is mounted on the top surface of the Y-direction guide rail mounting base, the number of the Y-direction slide rails is that the Y-direction slide rails are positioned at two sides of the screw rod, and the bottom surface of the screw rod sliding table is matched with the Y-direction slide rails; lifting platform includes that Z is to cylinder installation base, anchor clamps mount table, a plurality of Z to cylinder, cylinder connecting rod, Z installs on Z is to cylinder installation base to the cylinder sleeve part of cylinder, and Z is connected with the one end of cylinder connecting rod to the output shaft of cylinder, and the opposite side and the anchor clamps mount table of cylinder connecting rod are articulated, and Z is to cylinder installation base mounting on the lead screw slip table, it installs on the anchor clamps mount table to rotate the motor support. X can realize that Y removes along the X direction to the slide rail to guide rail installation base, can realize through Y to the slide rail that lead screw slip table is at the ascending removal of Y direction, and Z is to the perpendicular of direction through cylinder control anchor clamps mount table and reciprocates, sets up the subassembly and installs on the anchor clamps mount table, controls motor or cylinder through controlgear, realizes automatic adjustment, reduces the position that the subassembly was set up in manual adjustment, improves production efficiency. Through setting up a plurality of Z to the cylinder, can realize the slope of anchor clamps mount table, through the lift height of controlling different Z to the cylinder, the anchor clamps mount table possesses the slope function, can be to the complicated return bend of centre gripping, the position of the subassembly is set up in the adjustment.

Preferably, Z is to cylinder installation base, anchor clamps mount table and be the plate shape, and the quantity of Z is 4 to cylinder, cylinder connecting rod, and 4Z are to the cylinder and install the four corners at Z to cylinder installation base, and the cylinder connecting rod is cylinder and spheroidal assembly. Not only can the 4 cylinders be tilted in multiple directions, but the stability of the 4 cylinders is also optimal.

Preferably, the centering mechanism comprises a guide disc, a pipe inner wall supporting rod, a supporting rod guide block, a turbine disc support, a first gear, a centering mechanism motor support, a second gear and a centering mechanism base, wherein the guide disc, the turbine disc support and the centering mechanism motor support are sequentially arranged on the centering mechanism base, the pipe inner wall supporting rod is connected with the guide disc in a sliding manner, two ends of the supporting rod guide block are respectively connected with one side of the pipe inner wall supporting rod and one side of the turbine disc, the turbine disc is arranged on the turbine disc support, the axis of the turbine disc support and the axis of the guide disc are connected, the other side of the turbine disc is connected with the second gear, the first gear is connected with an output shaft of the centering mechanism motor, the centering mechanism motor is arranged on the centering mechanism motor support, the first gear is meshed with the second gear, the centering mechanism motor drives the turbine disc to rotate, the turbine disc drives the pipe inner wall supporting rod to move along the radial direction of the guide disc, and the centering mechanism base is installed on the top surface of the fixture installation table. Traditional centering tool is cone or cylinder, with cone or cylinder embedding to the return bend in, reduces rocking of return bend, but this kind of mode exists the connection insecure, can not match the return bend of different specifications, and a plurality of inside pipe wall bracing pieces can move along the radial direction of guide disc under the effect to new mechanism motor, to the return bend centering of different specifications.

Preferably, the guide disc is a disc with a rectangular groove, the supporting rod on the inner wall of the pipe is a cylindrical rod with a pin groove at one end, the supporting rod guide block is a rectangular block with pin columns at two ends, and the turbine disc is a disc with a turbine wire groove. Two pin columns are arranged on one side of the supporting rod guide block, one pin column is arranged on the other side of the supporting rod guide block, the two pin columns of the supporting rod guide block are embedded into the turbine wire groove, one pin column of the supporting rod guide block is matched with the pin groove of the supporting rod on the inner wall of the pipe, and the supporting rod guide block and the supporting rod on the inner wall of the pipe can be embedded into the rectangular groove of the guide disc.

The utility model discloses following beneficial effect has:

1. this application adopts motor drive Y slide rail and X to the slide rail, and Z is to cylinder lift platform, sets up the removal that X, Y can be realized to the main part, and Z realizes setting up the lift of main part to cylinder lift platform to and through controlling different Z to the cylinder, the slope of main part is set up in the realization, and slewing mechanism makes to set up the main part and can rotate the same position control, reduces manual regulation work load, realizes automated control, improves operating efficiency.

2. The degree of inclination of anchor clamps mount table can be adjusted in the lift of four cylinders of control in this application, when the axis is the return bend centre gripping of different space curve shapes, when one of them section position of elbow facing, keeps the return bend axis parallel of anchor clamps mount table and this section position through adjusting inclination for fastening device carries out the centre gripping to the axis is the curved return bend in space.

3. The flexible fastening piece adopts the chain, uses the chain to compress tightly the return bend, increases with the binding face on return bend surface, reduces the damage on return bend surface, also is convenient for fix the return bend of different diameters. The cooperation of clamping screw and chain makes the return bend by the firm of centre gripping, and the clamping screw terminal surface sets up the arc recess, and the arc recess can make the axis direction that adds the holding power and clamping screw be in same direction.

4. Compare cone and cylinder to the return bend centering, reduce rocking of return bend, this application is equipped with driving motor through two centering mechanisms, and through control motor, can make the supporting part on the centering mechanism expand gradually into the diameter size that needs, realize laminating with the return bend inner wall to the both ends of this fixed return bend reduce rocking at return bend both ends.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic view of a fastening assembly according to an embodiment of the present invention.

Fig. 2 is a schematic view of the assembly of the clamp according to the embodiment of the present invention.

Fig. 3 is a schematic view of a screw sliding platform according to an embodiment of the present invention.

Fig. 4 is a schematic view of a clamp base according to an embodiment of the present invention.

Fig. 5 is a schematic view of the centering mechanism according to the embodiment of the present invention.

Fig. 6 is a schematic view of a lifting platform according to an embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a fixing screw according to an embodiment of the present invention.

Reference numbers and corresponding part names: 1-fastening assembly, 101-fastening body, 102-flexible fastening piece, 103-rotating mechanism, 1031-rotating motor, 1032-rotating motor support, 104-fixing mechanism, 1041-fixing screw, 1042-fixing nut, 2-clamp base, 3-screw rod sliding platform, 301-screw rod, 302-screw rod sliding platform, 303-screw rod coupler, 304-motor coupler, 305-screw rod bearing seat, 306-X-direction slide rail, 307-Y-direction slide rail, 308-Y-direction guide rail mounting base, 309-driving roller, 4-lifting platform, 401-Z-direction cylinder mounting base, 402-Z-direction cylinder, 403-cylinder connecting rod, 404-clamp mounting table, 5-centering mechanism, 501-guide disc, 502-inner wall support rod of pipe, 503-support rod guide block, 504-turbine disk, 505-turbine disk support, 506-first gear, 507-centering mechanism motor, 508-centering mechanism motor support, 509-second gear, 510-centering mechanism base.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1:

as shown in fig. 1 to 7, a flexible clamp for a thin-walled elbow with a spatial curve axis comprises a clamp body, wherein the clamp body comprises a fastening assembly 1 for clamping the elbow, the fastening assembly 1 comprises a fastening body 101, a flexible fastener 102 detachably connected with the fastening body 101, a rotating mechanism 103 for driving the fastening body 101 to rotate, and a fixing mechanism 104 for fixing the fastening body 101 and the elbow wrapped by the flexible fastener 102, and the fixing mechanism 104 is mounted on the fastening body 101.

In this embodiment, the rotating mechanism 103 includes a rotating motor 1031, a rotating motor support 1032, the rotating motor 1031 is mounted at the lower end of the rotating motor support 1032, the output shaft of the rotating motor 1031 passes through the rotating motor support 1032, and the output shaft of the rotating motor 1031 is connected with the bottom of the fastening body 101.

In this embodiment, the flexible fastener 102 is a chain, both ends of which are mounted on the top of the fastening body 101 by pins, and the fastening body 101 is in a "Y" shape.

In this embodiment, the fixing mechanism 104 includes a fixing screw 1041 and a fixing nut 1042, one end of the fixing screw 1041 is matched with the fixing nut 1042, the other end of the fixing screw 1041 penetrates through the fastening body 101, and the fixing screw 1041 is in threaded fit with the fastening body 101. The end of the fixing screw 1041 is provided with an arc groove, and the central angle corresponding to the arc groove is 60 °.

Example 2:

as shown in fig. 1 to 7, the present embodiment is further limited by embodiment 1, the fixture main body further includes a fixture base 2, a screw sliding platform 3 connected to the fixture base 2 in a rolling manner, and a lifting platform 4, the screw sliding platform 3 includes a screw 301, a screw sliding platform 302 connected to the screw 301 in a spiral manner, a screw coupling 303 connected to one end of the screw 301, a motor coupling 304 connected to the screw coupling 303, and further includes a screw bearing seat 305, an X-directional slide rail 306, a Y-directional slide rail 307, a Y-directional rail mounting base 308, and a driving roller 309, the X-directional slide rail 306 is mounted on the fixture base 2, two ends of the screw 301 are respectively mounted with a screw shaft seat 305, the screw shaft seat 305 is mounted on a top surface of the Y-directional rail mounting base 308, the screw shaft seat 305 is located at a middle position of a top surface of the Y-directional rail mounting base 308, the Y-directional slide rail 307 is mounted on a top surface, the number of the Y-direction slide rails 307 is 2, 2Y-direction slide rails 307 are positioned on two sides of the screw rod 301, and the bottom surface of the screw rod sliding table 302 is matched with the Y-direction slide rails 307; the lifting platform 4 comprises a Z-direction air cylinder mounting base 401, a fixture mounting table 404, a plurality of Z-direction air cylinders 402 and air cylinder connecting rods 403, wherein cylinder sleeve parts of the Z-direction air cylinders 402 are mounted on the Z-direction air cylinder mounting base 401, the Z-direction air cylinders 402 are connected with one ends of the air cylinder connecting rods 403, the other sides of the air cylinder connecting rods 403 are hinged to the fixture mounting table 404, the Z-direction air cylinder mounting base 401 is mounted on a screw rod sliding table 302, and a rotating motor support 1032 is mounted on the fixture mounting table 404.

In this embodiment, the Z-direction cylinder mounting base 401 and the jig mounting table 404 are both flat plates, the number of the Z-direction cylinders 402 and the number of the cylinder connecting rods 403 are 4, the 4Z-direction cylinders 402 are mounted at four corners of the Z-direction cylinder mounting base 401, and the cylinder connecting rods 403 are a combination of a cylinder and a sphere.

Example 3:

as shown in fig. 1 to 7, this embodiment is further limited on the basis of embodiment 1, and further includes an alignment mechanism 5 for centering a bend port, where the alignment mechanism 5 includes a guide disc 501, a tube inner wall support rod 502, a support rod guide block 503, a turbine disc 504, a turbine disc support 505, a first gear 506, an alignment mechanism motor 507, an alignment mechanism motor support 508, a second gear 509, and an alignment mechanism base 510, where the guide disc 501, the turbine disc support 505, and the alignment mechanism motor support 508 are sequentially mounted on the alignment mechanism base 510, the tube inner wall support rod 502 is slidably connected with the guide disc 501, two ends of the support rod guide block 503 are respectively connected with one side of the tube inner wall support rod 502 and one side of the turbine disc 504, the turbine disc 504 is mounted on the turbine disc support 505, an axis of the turbine disc support 505 is collinear with an axis of the guide disc 501, and the other side of the turbine disc 504 is connected with the second gear 509, the first gear 506 is connected with an output shaft of the centering mechanism motor 507, the centering mechanism motor 507 is installed on a centering mechanism motor support 508, the first gear 506 is meshed with the second gear 509, the centering mechanism motor 507 drives the turbine disc 504 to rotate, the turbine disc 504 drives the pipe inner wall supporting rod 502 to move along the radial direction of the guide disc 501, and the centering mechanism base 510 is installed on the top surface of the fixture installation table 404.

In this embodiment, the guide disc 501 is a circular disc with 6 rectangular grooves, the supporting rod 502 on the inner wall of the pipe is a cylindrical rod with a pin groove at one end, the supporting rod guide block 503 is a rectangular block with pins at both ends, and the turbine disc 504 is a circular disc with a turbine wire groove.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A flexible clamp for a thin-wall bent pipe with a spatial curve axis comprises a clamp body, wherein the clamp body comprises a fastening assembly (1) for clamping the bent pipe, the flexible clamp is characterized in that the fastening assembly (1) comprises a fastening body (101), a flexible fastening piece (102) detachably connected with the fastening body (101), a rotating mechanism (103) for driving the fastening body (101) to rotate, and a fixing mechanism (104) for fixing the bent pipe wrapped by the fastening body (101) and the flexible fastening piece (102), and the fixing mechanism (104) is mounted on the fastening body (101).

2. A flexible clamp for thin-walled elbow whose axis is a spatial curve according to claim 1, characterized in that the rotation mechanism (103) comprises a rotation motor (1031), a rotation motor holder (1032), and an output shaft of the rotation motor (1031) is connected with the fastening body (101).

3. A flexible clamp for thin-walled elbows with axes that are space curves according to claim 1, wherein the flexible fastener (102) is a chain with both ends mounted on top of the fastening body (101) by pins.

4. A flexible clamp for a thin-walled elbow whose axis is a spatial curve according to claim 1, characterized in that the fixing mechanism (104) comprises a fixing screw (1041) and a fixing nut (1042), one end of the fixing screw (1041) is engaged with the fixing nut (1042), the other end of the fixing screw (1041) passes through the fastening body (101), and the fixing screw (1041) is threadedly engaged with the fastening body (101).

5. A flexible clamp for thin-walled elbow whose axis is space curve according to claim 4 characterized in that the end of the fixing screw (1041) facing the flexible fastener (102) is provided with an arc-shaped groove corresponding to the central angle of 15-90 °.

6. A flexible clamp for thin-walled elbows with axes that are space curves according to claim 1, wherein the fastening body (101) is of "Y" configuration.

7. The flexible clamp for the thin-wall elbow with the axis being a space curve as claimed in claim 2, wherein the clamp main body further comprises a clamp base (2), a screw rod sliding platform (3) connected with the clamp base (2) in a rolling manner, and a lifting platform (4), the screw rod sliding platform (3) comprises a screw rod (301), a screw rod sliding table (302) connected with the screw rod (301) in a spiral manner, a screw rod coupler (303) connected with one end of the screw rod (301), a motor coupler (304) connected with the screw rod coupler (303), and further comprises a screw rod bearing seat (305), an X-direction slide rail (306), a Y-direction slide rail (307), a Y-direction guide rail mounting base (308) and a driving roller (309), the X-direction slide rail (306) is mounted on the clamp base (2), and a screw rod bearing seat (305) is mounted at each end of the screw rod (301), the screw rod bearing seat (305) is arranged on the top surface of the Y-direction guide rail mounting base (308), the screw rod bearing seat (305) is located in the middle of the top surface of the Y-direction guide rail mounting base (308), the Y-direction slide rails (307) are arranged on the top surface of the Y-direction guide rail mounting base (308), the number of the Y-direction slide rails (307) is 2, 2Y-direction slide rails (307) are located on two sides of the screw rod (301), and the bottom surface of the screw rod sliding table (302) is matched with the Y-direction slide rails (307); lifting platform (4) include Z to cylinder installation base (401), anchor clamps mount table (404), a plurality of Z to cylinder (402), cylinder connecting rod (403), Z installs on Z to cylinder installation base (401) to the cylinder liner part of cylinder (402), and Z is connected with the one end of cylinder connecting rod (403) to the output shaft of cylinder (402), and the opposite side and anchor clamps mount table (404) of cylinder connecting rod (403) are articulated, and Z installs on lead screw slip table (302) to cylinder installation base (401), rotate motor support (1032) and install on anchor clamps mount table (404).

8. The flexible clamp for the thin-wall elbow with the axis being the space curve as claimed in claim 7, wherein the Z-direction cylinder mounting base (401) and the clamp mounting table (404) are both flat plates, the number of the Z-direction cylinders (402) and the cylinder connecting rods (403) is 4, the 4Z-direction cylinders (402) are mounted at four corners of the Z-direction cylinder mounting base (401), and the cylinder connecting rods (403) are a combination of a cylinder and a sphere.

9. The flexible fixture for the thin-wall elbow with the axis being the space curve is characterized by further comprising an alignment mechanism (5) for centering an elbow port, wherein the alignment mechanism (5) comprises a guide disc (501), an inner wall support rod (502), a support rod guide block (503), a turbine disc (504), a turbine disc support (505), a first gear (506), an alignment mechanism motor (507), an alignment mechanism motor support (508), a second gear (509) and an alignment mechanism base (510), the guide disc (501), the turbine disc support (505) and the alignment mechanism motor support (508) are sequentially mounted on the alignment mechanism base (510), the inner wall support rod (502) is connected with the guide disc (501) in a sliding manner, two ends of the support rod guide block (503) are respectively connected with one side of the inner wall support rod (502) and one side of the turbine disc (504), the turbine disc (504) is installed on a turbine disc support (505), the axis of the turbine disc support (505) is collinear with the axis of the guide disc (501), the other side of the turbine disc (504) is connected with a second gear (509), a first gear (506) is connected with an output shaft of a centering mechanism motor (507), the centering mechanism motor (507) is installed on a centering mechanism motor support (508), the first gear (506) is meshed with the second gear (509), the centering mechanism motor (507) drives the turbine disc (504) to rotate, the turbine disc (504) drives a pipe inner wall supporting rod (502) to move along the radial direction of the guide disc (501), and a centering mechanism base (510) is installed on the top surface of the fixture installation table (404).

10. A flexible fixture for thin-walled elbow whose axis is a space curve according to claim 9, characterized in that the guide disc (501) is a disc with 6 rectangular slots, the tube inner wall support bar (502) is a cylindrical bar with a pin slot at one end, the support bar guide block (503) is a rectangular block with pins at both ends, and the turbine disc (504) is a disc with turbine wire slots.