CN112476289A - A frock clamp for nifi alloy vascular support heat setting - Google Patents

Abstract

The invention relates to a tool clamp for heat setting of a NiTi alloy intravascular stent, which comprises a driving system and a supporting system, wherein the supporting system comprises a supporting component, a lining component which is connected with the supporting component in a sliding way and can expand or contract along the radial direction, and a supporting rod which can control the lining component to expand or contract along the radial direction along with the movement of the supporting system, the NiTi alloy intravascular stent is sleeved on the lining component, and the supporting rod is detachably connected with the driving system and driven by the driving system to move. The tool clamp provided by the invention can meet the requirements of brackets with different diameters; a bush component is added between the clamp and the bracket, so that the friction effect of direct contact between the bracket and the support rod is avoided, the fracture rate of the bracket is reduced, and the mechanical impact force on the bracket in the process of supporting the bracket is reduced; when the large-diameter support is prepared, the function of gradually expanding the support by using the support rods with different diameters is achieved, the operation is simple and labor-saving, and the deformation of the support is uniform.

Description

A frock clamp for nifi alloy vascular support heat setting

Technical Field

The invention relates to the field of medical instruments, in particular to a heat setting tool clamp for a NiTi alloy intravascular stent.

Background

One method for processing the NiTi alloy intravascular stent is to cut a section of small-diameter steel tube by laser to form a stent model, then gradually open the stent mesh tube by using a clamp, and perform a heat setting process to obtain the required stent.

At present, the related support expanding technology mostly adopts mechanical transmission, and the impact and the vibration of the mechanical transmission are relatively large; in addition, the direct contact between the clamp and the bracket easily causes the bracket to deform during processing, and the clamp generates large mechanical impact on the bracket in the process of expanding the bracket, so that the bracket is easy to break. In addition, the clamp type in the prior art is fixed, and the requirements of brackets with different diameters cannot be met.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a tool clamp for heat setting of a NiTi alloy intravascular stent, the tool clamp is not easy to damage the stent in the stent expanding process, can meet the requirements of stents with different diameters, and is easy to process and simple to operate.

In order to solve the technical problems, the invention adopts a technical scheme that:

a tooling clamp for heat setting of a NiTi alloy intravascular stent comprises a driving system and a supporting system, wherein the supporting system comprises a supporting component, a lining component which is in sliding connection with the supporting component and can expand or contract along the radial direction, and a supporting rod which can control the lining component to expand or contract along the radial direction along with the movement of the supporting system, the NiTi alloy intravascular stent is sleeved on the lining component, and the supporting rod is detachably connected with the driving system and driven by the driving system to move.

The bushing assembly of the tool clamp for heat setting of the NiTi alloy intravascular stent can be radially expanded or contracted, so that the requirements of stents with different diameters are met, and the requirements of the stents with different diameters can be met only by replacing corresponding support rods when the required diameters of the stents are different; on the other hand, when the stent is expanded to a larger diameter, the tool clamp disclosed by the invention is utilized to gradually open the stent by using the support rods with different diameters, so that the stress borne in the stent expansion process is reduced, and the risks of stent damage and cracking are reduced.

Preferably, the drive system is a hydraulic drive system.

Further preferably, the driving system comprises a motor, a hydraulic oil pump connected with the motor and driven by the motor to work, a hydraulic cylinder connected with the hydraulic oil pump and driven by the hydraulic oil pump to work, and a hydraulic rod connected with the hydraulic cylinder and driven by the hydraulic cylinder to move, wherein the upper end of the hydraulic rod is detachably connected with the lower end of the stay bar through threads.

The hydraulic transmission runs stably, the impact and the vibration to the support are relatively small, the support is well buffered in the process of opening the support, and the protection of the lining is added, so that the hydraulic transmission has an important effect on improving the processing quality of the support.

Preferably, the tool clamp further comprises a box body, the hydraulic driving system is installed in the box body, and the lower end portion of the supporting component is fixedly connected with the upper surface of the box body. Further preferably, a hydraulic rod of the hydraulic drive system partially protrudes from an upper surface of the case and is movable in an up-down direction by the hydraulic cylinder so that the stay rod is movable in the up-down direction.

Preferably, the bushing assembly comprises a bushing formed by combining at least two strips and having a channel therein for inserting the free end of the stay bar, and a slider fixedly connected to one end of each of the strips.

Further preferably, the support assembly is provided with a sliding groove which can be matched with the sliding block to slide, so that when the stay bar is inserted into the bushing to expand the bushing, the movement direction of each strip block can be well limited, the expansion uniformity of the bushing is ensured, and the risk of damage to the support is reduced.

Further preferably, the cross section of the lining is circular, so that the support can be well matched with the outer surface of the lining, the stay bar can be well matched with the inner surface of the lining, the processing quality of the support is improved, and the risk of damage to the support is reduced.

Preferably, the number of the long blocks is 3-8, and preferably 4-6.

Preferably, the support assembly includes a support frame having a first opening for the stay bar to pass through therein, and a pad block fixedly connected to the support frame and having a second opening for the stay bar to pass through therein.

Further preferably, the cross section of the second opening is circular.

Further preferably, the support frame comprises a support surface and a plurality of support feet extending downwards along the support surface, the first opening is arranged at the middle position of the support surface, and the cushion block is arranged on the support surface.

Further preferably, the supporting legs are fixedly connected with the upper surface of the box body through first bolts.

Further preferably, a plurality of sliding grooves are formed in the cushion block and are evenly distributed along the circumferential direction of the second opening, each sliding groove extends along the radial direction of the second opening, and a sliding block capable of sliding in cooperation with the sliding groove is formed in the bushing assembly.

Further preferably, the cushion block is formed by combining at least two cushion members, the second opening is formed between the at least two cushion members, a plurality of radial grooves which extend along the radial direction of the second opening and are convenient for adjusting the positions of the cushion members are formed on the support frame, and the at least two cushion members are fixedly connected with the radial grooves on the support frame through bolts, so that the cushion members move to the outermost side of the radial grooves, namely, when the diameter of the second opening reaches the maximum, the support rod can be prevented from being adjusted to be too large in diameter for use.

According to a particular and preferred embodiment, the diameter of the first opening is greater than or equal to the maximum diameter achievable by the second opening.

Further preferably, the cushion block is arc-shaped.

More preferably, the number of the cushion pieces is 3-8, and preferably 4-6.

Preferably the ends of the free ends of the struts are tapered to facilitate insertion of the struts into the bushings.

Preferably, the support rods comprise a plurality of support rods with different diameter specifications and different length specifications, the diameter specification is 1-20 mm, and the diameter difference between every two adjacent support rods with the diameter specifications is 0.5-3 mm; the length specification is 20-200 mm, and the length difference between two adjacent stay bars is 10-20 mm.

It is further preferred that the length of the strut is greater than or equal to the length of the stent, thereby facilitating expansion of the stent throughout the length of the stent.

Preferably, the stay bar is processed into a stay bar with a small diameter after being worn and is continuously used.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the tool clamp provided by the invention can meet the requirements of brackets with different diameters; a bush component is added between the clamp and the bracket, so that the friction effect of direct contact between the bracket and the support rod is avoided, the fracture rate of the bracket is reduced, and the mechanical impact force on the bracket in the process of supporting the bracket is reduced; when the large-diameter support is prepared, the function of gradually expanding the support by using the support rods with different diameters is achieved, the operation is simple and labor-saving, and the deformation of the support is uniform.

Drawings

FIG. 1 is a schematic structural view of a tooling fixture according to an embodiment of the present invention;

FIG. 2 is a front view of a tooling fixture in an embodiment of the present invention;

FIG. 3 is a top view of a tooling fixture in an embodiment of the present invention;

FIG. 4 is a schematic view of a bushing in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram of a spacer according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a brace bar in an embodiment of the present invention;

FIG. 7 is a schematic structural view of a support stand according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a hydraulic drive system according to an embodiment of the present invention.

In the figure: 1. the hydraulic support comprises a bushing, 2, cushion blocks, 3, a support frame, 4, a support rod, 5, a first bolt, 6, a hydraulic rod, 7, a hydraulic cylinder, 8, a motor, 9, a hydraulic oil pump, 10, a box body, 11, a second bolt, 12, a support, 13, a long strip block, 14, a sliding block, 15, a sliding groove, 16, a radial groove, 17, a cushion piece, 18, a supporting leg, 19, a supporting surface, 20 and a bolt hole.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive. In the description of the embodiments of the present invention, it should be understood that the terms "length", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise. In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations. In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature. The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. To simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The tooling fixture for the heat setting of the NiTi alloy intravascular stent shown in the attached drawings 1 to 8 comprises a driving system and a supporting system.

As shown in fig. 1 to 3, the supporting system comprises a supporting component, a bushing component which is slidably connected with the supporting component and can expand or contract along the radial direction, and a support rod 4 which can control the bushing component to expand or contract along the radial direction along with the self-movement, the NiTi alloy intravascular stent 12 is sleeved on the bushing component, and the support rod 4 is detachably connected with a driving system and is driven by the driving system to move so as to expand the stent 12.

The driving system in the present invention drives the support rod 4 to reciprocate, wherein the driving system may be driven by hydraulic pressure, pneumatic pressure, etc., and the present embodiment is preferably driven by hydraulic pressure.

As shown in fig. 8, in a specific and preferred embodiment of this embodiment, the driving system is a hydraulic driving system, the hydraulic transmission operates smoothly, the impact and the vibration to the support 12 are relatively small, the support 12 is well buffered during the process of expanding the support 12, and the protection of the bushing 1 plays an important role in improving the processing quality of the support 12. The hydraulic driving system comprises a motor 8, a hydraulic oil pump 9 connected with the motor 8 and driven to work by the motor 8, a hydraulic cylinder 7 connected with the hydraulic oil pump 9 and driven to work by the hydraulic oil pump 9, and a hydraulic rod 6 connected with the hydraulic cylinder 7 and driven to move by the hydraulic cylinder 7, wherein the hydraulic rod 6 is detachably connected with one end of the support rod 4 so as to conveniently replace the support rods 4 with different sizes to expand the support 12 step by step. Preferably, the upper end of the hydraulic rod 6 is detachably connected with the lower end of the stay bar 4 through threads, so that the bracket 12, the bushing assembly and the like can be vertically placed, and then only the lower end of the bracket 12, the bushing assembly and the like needs to be fixed without fixing the upper end, thereby facilitating the operation and simplifying the structure of the tool clamp.

In a specific and preferred embodiment of this embodiment, the tool holder further includes a box 10, the hydraulic driving system is installed in the box 10, and the hydraulic rod 6 of the hydraulic driving system partially extends out of the upper surface of the box 10 and can be driven by the hydraulic cylinder 7 to move in the up-down direction, so that the stay 4 can move in the up-down direction. The lower end of the support assembly is fixedly connected with the upper surface of the box body 10.

As shown in fig. 4, the bushing assembly includes a bushing 1 composed of at least two blocks 13 and having a passage therein for inserting the free end of the stay 4, and a slider 14 fixedly coupled to one end of each block 13. Have on the supporting component and to cooperate gliding spout 15 with slider 14 to when vaulting pole 4 inserts bush 1 and makes bush 1 expand, the motion direction of each rectangular piece 13 of restriction that can be fine just guarantees the homogeneity of bush 1 expansion, and then reduces the risk that support 12 damaged.

Preferably, as illustrated in fig. 4 and 5, the slider 14 has a first portion that is wider and a second portion that is located above the first portion and is narrower; accordingly, the slide groove 15 has a first groove portion that is wide and a second groove portion that is above the first groove portion and is narrow, so that the slider 14 and the slide groove 15 do not separate when the slider 14 is engaged with the slide groove 15.

Specifically, the cross section of the bush 1 is circular, so that the support 12 can be well matched with the outer surface of the bush 1, and the stay bar 4 can be well matched with the inner surface of the bush 1, so that the processing quality of the support 12 is improved, and the risk of damage to the support 12 is reduced. The number of the long blocks 13 is 3-8, and the number of the long blocks 13 in fig. 4 is 4.

As shown in fig. 1, 2, 5 and 7, the support assembly includes a support frame 3 having a first opening for the stay 4 to pass through therein, and a pad block 2 fixedly connected to the support frame 3 and having a second opening for the stay 4 to pass through therein. The shape of the first opening and the second opening can be circular, triangular, quadrilateral, pentagonal, hexagonal, elliptical and the like, and it is within the protection scope of the present invention that the stay bar 4 can be inserted and the maximum diameter of the inscribed circle of the first opening is larger than or equal to the maximum diameter of the inscribed circle that can be reached by the second opening.

In the present embodiment, the sliding grooves 15 are formed on the pad 2 and are uniformly distributed along the circumferential direction of the second opening, and each sliding groove 15 extends along the radial direction of the second opening.

As shown in fig. 5, the cushion block 2 is formed by combining at least two cushion members 17, and a second opening is defined between the at least two cushion members 17; the number of the cushion members 17 is preferably 3-8, and 4 in the embodiment

As shown in fig. 7, the supporting frame 3 includes a supporting surface 19 and a plurality of supporting legs 18 extending downward along the supporting surface 19, and lower ends of the supporting legs 18 are fixedly connected to an upper surface of the box 10 by the first bolts 5. The first opening is arranged in the middle of said support surface 19, the support surface 19 being annular. A plurality of radial grooves 16 which extend along the radial direction of the second opening so as to facilitate the position adjustment of the cushion members 17 are formed on the supporting surface 19 of the supporting frame 3, and the arrangement number and the arrangement positions of the radial grooves 16 are matched with the number and the distribution of the cushion members 17; the pad 17 is fixedly connected with the radial groove 16 on the support frame 3, so that the pad 17 moves to the outermost side of the radial groove 16, namely, when the diameter of the second opening reaches the maximum, the strut 4 can be prevented from being adjusted to be too large in diameter for use. Specifically, at least two pad members 17 are fixedly connected to the support frame 3 by the second bolts 11.

In a specific and preferred embodiment of this embodiment, the bushing assembly is defined by 4 identical elongated blocks 17 and has a circular channel inside for the stay bar 4 to be inserted, and the lower end of each elongated block 17 is fixedly connected with the sliding block 14. The cushion block 2 is formed by combining 4 identical cushion pieces 17, and a circular second opening is formed between the cushion pieces 17 in an enclosing mode. The cushion block 2 is provided with 4 sliding grooves 15 which are uniformly distributed along the circumferential direction of the second opening, each sliding groove 15 extends along the radial direction of the second opening, the sliding grooves 15 correspond to the sliding blocks 14 on the long blocks 17 one by one, and the sliding blocks 14 on the long blocks 17 are inserted into the sliding grooves 15 to move along the radial direction so as to realize the expansion or contraction of the lining 1. The cushion block 2 is provided with a bolt hole 20 and fixed on the supporting surface 19 through a second bolt 11, and when the struts 4 with different diameters need to be adjusted, the cushion piece 17 can slide to a proper position along the radial groove 16 and then be fixed through the second bolt 11.

It should be noted that the shapes of the sliding block 14 and the sliding slot 15 are not limited, and may be polygonal column and cylindrical column, as long as the sliding block 14 and the sliding slot 15 can slide in cooperation to realize the expansion or contraction function of the bushing 1, and the invention is within the protection scope of the present invention. The shape of the supporting surface 19 of the supporting frame 3 is not limited, and may be circular, square or polygonal, and may be convex upward or concave downward, as long as the supporting surface can be fixedly connected with the cushion block 2, and the position of the cushion block 2 can be adjusted along the radial groove 17 on the supporting surface 19. The number of the supporting feet 18 is not limited, and may be 2, 3, 4, 5 or 6, as long as the supporting function of the supporting surface 19 can be achieved, and the invention is within the protection scope.

As shown in fig. 6, the free ends of the stay 4 are tapered at their ends to facilitate insertion of the stay 4 into the bush 1. The stay bars 4 comprise a plurality of stay bars with different diameter specifications and different length specifications, the diameter specification is 1-20 mm, and the diameter difference between every two adjacent stay bars 4 with the diameter specifications is 0.5-3 mm; the length specification is 20-200 mm, the length difference between two adjacent length specification stay bars 4 is 10-20 mm, and particularly and preferably, the length of the stay bar 4 is greater than or equal to that of the support 12.

The stay bar 4 of the invention can be used continuously after being processed into a stay bar 4 with a small diameter after being worn.

At present, the diameter of the stent tube which is 50mm long and 3mm in diameter is 20mm by using the tool clamp, and in order to prevent the stent from being broken, the stent radially expands by about 1mm each time, and the specific principle and the steps are as follows:

the working principle is as follows:

the support 12 is sleeved on the bush 1 and driven by a hydraulic system, the hydraulic rod 6 pushes the support rod 4 to move upwards, the bush 1 is pushed by the support rod 4 to move radially outwards, the support 12 sleeved on the bush 1 is gradually expanded until the support 12 with the whole length is expanded, the process is repeated by replacing the support rod with the diameter increased after the heat setting treatment until the diameter of the support 12 is 20 mm.

The bush 1 comprises 4 the same rectangular pieces 13 and rectangular piece 13 bottom is equipped with slider 14, cushion 2 comprises 4 the same pad 17, rectangular piece 13 and pad 17 one-to-one, slider 14 on rectangular piece 13 inserts respectively in the pad 17 corresponding with rectangular piece 13 for rectangular piece 13 is respectively to be done the radial slip on the pad 17 of below separately, be provided with spout 15 on the pad 17, play control bush 1 radial movement direction and bear the effect of vaulting pole 4 thrust upwards. When support 12 diameter increases to a definite value, 4 diameters of vaulting pole are corresponding increases also, and cushion 2 can hinder vaulting pole 4 to pass this moment, and is equipped with 4 radial grooves 16 on the support frame 3, makes things convenient for the position adjustment of cushion 2 to the vaulting pole 4 that adapts to bigger diameter passes through.

The implementation steps are as follows:

1. the clamp is debugged, the stay bar 4 with smaller diameter is installed and connected with the hydraulic rod 6, and the adjusting pad and the bush 1 are in proper positions, so that the subsequent support of the bracket 12 is facilitated;

2. the support 12 is opened, the support 12 is sleeved on the bushing 1, a power supply is started, the hydraulic control system pushes the support rod 4 to move upwards, the bushing 1 is pushed to move outwards in a radial direction until the support rod 4 is completely positioned in the bushing 1, and at the moment, the support 12, the bushing 1 and the support rod 4 are tightly attached together;

3. heat setting the support 12, namely putting the support 12 in a high-temperature furnace for heat setting;

4. adjusting the support rods 4, and taking down the support rods 4 after the whole heat setting and cooling are finished; a stay bar 4 with the size of 1-2 mm is used for mounting and hydraulic rods 6, and the steps are continuously repeated;

5. and (4) cleaning the clamp, turning off the power supply after the support 12 is supported to a given size, and respectively taking down the bushing 1 and the support rod 4 for protection and cleaning.

When the stent with the diameter of 3mm needs to be expanded to the diameter of 20mm, the tool clamp disclosed by the embodiment 1 of the invention is utilized, in order to prevent the stent from being broken, the stent is expanded by about 1mm each time, the struts with different diameters are replaced, and the stent is gradually expanded by using a hydraulic device, so that the operation is simple and labor-saving; meanwhile, due to gradual expansion, compared with one-time expansion, the stent is subjected to small stress, so that the fracture rate of the stent is greatly reduced; hydraulic transmission is more steady, has good buffering to the support at the support in-process that struts, and the guard action of bush adds, and support processingquality improves.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the invention, and not to limit the scope of the invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims (10)

1. The utility model provides a frock clamp for nifi alloy vascular support heat setting, frock clamp includes actuating system, braced system, its characterized in that: the supporting system comprises a supporting component, a lining component which is connected with the supporting component in a sliding mode and can expand or contract along the radial direction, and a support rod (4) which can control the lining component to expand or contract along the radial direction along with the movement of the support rod, the NiTi alloy intravascular stent (12) is sleeved on the lining component, and the support rod (4) is detachably connected with the driving system and driven by the driving system to move.

2. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 1, wherein: the driving system is a hydraulic driving system.

3. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 2, wherein: the driving system comprises a motor (8), a hydraulic oil pump (9) connected with the motor (8) and driven by the motor (8), a hydraulic cylinder (7) connected with the hydraulic oil pump (9) and driven by the hydraulic oil pump (9), and a hydraulic rod (6) connected with the hydraulic cylinder (7) and driven by the hydraulic cylinder (7), wherein the upper end part of the hydraulic rod (6) is detachably connected with the lower end part of the support rod (4) through threads.

4. The tooling fixture for heat setting of the NiTi alloy intravascular stent as claimed in any one of claims 1 to 3, wherein: the tool clamp further comprises a box body (10), the hydraulic driving system is installed in the box body (10), and the lower end portion of the supporting component is fixedly connected with the upper surface of the box body (10).

5. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 1, wherein: the bush subassembly includes and is formed by two at least rectangular pieces (13) combination, and inside has the confession bush (1) of the free end male passageway of vaulting pole (4), with every slider (14) of the one end looks fixed connection of rectangular piece (13), last having of supporting component can with slider (14) cooperate gliding spout (15), the cross section of bush (1) is the ring form.

6. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 5, wherein: the number of the long blocks (13) is 3-8.

7. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 1, wherein: the supporting component comprises a supporting frame (3) with a first opening, a cushion block (2) and a bushing component, wherein the supporting frame (3) is internally provided with a first opening, the first opening is used for the stay bar (4) to pass through, the cushion block (2) is fixedly connected with the supporting frame (3) and internally provided with a second opening, the second opening is provided with a cross section in a circular shape, a plurality of sliding grooves (15) are formed in the cushion block (2) and uniformly distributed along the circumferential direction of the second opening, each sliding groove (15) extends along the radial direction of the second opening, and a sliding block (14) capable of sliding in a matched mode with the sliding grooves (15) is formed in the bushing component.

8. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 7, wherein: the cushion block (2) is formed by combining at least two cushion pieces (17), the second opening is formed between the at least two cushion pieces, a plurality of radial grooves (16) which extend along the radial direction of the second opening and are convenient for the position adjustment of the cushion pieces (17) are formed on the supporting frame (3), and the at least two cushion pieces (17) are fixedly connected with the radial grooves (16) on the supporting frame (3) through bolts.

9. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 8, wherein: the number of the cushion pieces (17) is 3-8.

10. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 1, wherein: the end part of the free end of each stay bar (4) is tapered, each stay bar (4) comprises a plurality of stay bars with different diameter specifications and different length specifications, the diameter specification is 1-20 mm, and the diameter difference between every two adjacent stay bars (4) with different diameter specifications is 0.5-3 mm; the length specification is 20-200 mm, and the length difference between the stay bars (4) of two adjacent length specifications is 10-20 mm.

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