CN114101504A - Universal tool clamp for heat setting of metal vascular stent - Google Patents
Universal tool clamp for heat setting of metal vascular stent Download PDFInfo
- Publication number
- CN114101504A CN114101504A CN202111202580.9A CN202111202580A CN114101504A CN 114101504 A CN114101504 A CN 114101504A CN 202111202580 A CN202111202580 A CN 202111202580A CN 114101504 A CN114101504 A CN 114101504A
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- supporting block
- fixed
- sliding
- rod
- support frame
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- 239000002184 metal Substances 0.000 title claims abstract description 28
- 238000009998 heat setting Methods 0.000 title claims abstract description 22
- 230000002792 vascular Effects 0.000 title claims description 20
- 238000000034 method Methods 0.000 claims abstract description 11
- 210000004204 blood vessel Anatomy 0.000 claims description 20
- 238000001179 sorption measurement Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
Abstract
The invention discloses a universal tool clamp for heat setting of a metal intravascular stent, which is used for carrying out size expansion on the metal intravascular stent; the method comprises the following steps: the device comprises a fixed base, a fixed conical supporting block, a supporting rod, a positioning supporting rod supporting frame, a sliding conical supporting block, a supporting rod limiting strip, a sliding base, a pin and a nut; the metal intravascular stent is sleeved on the support rods, the distance between the two conical support blocks is changed by the movement of the nuts along the guide rods to the direction of fixing the conical support blocks, so that the support rods move outwards along the radial direction to realize the expansion of the intravascular stent, the size of the stent can be determined by the support rod limit strips, and the stepped expansion of the metal intravascular stents with various sizes can be realized by the support rod limit strips with different sizes; the invention can realize the nondestructive expansion of the metal intravascular stent, has reasonable composition, convenient operation and simple process, can realize the stepwise expansion of the metal intravascular stents with various sizes only by replacing the strut limiting strips with different sizes, and does not need to frequently disassemble, assemble and replace the clamp.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a universal tool clamp for heat setting of a metal intravascular stent.
Background
One method for processing the metal blood vessel stent is to cut a section of small-diameter metal tube by laser to form a stent model, then gradually expand the stent model by a clamp, put the stent model into a furnace for heat setting, and then obtain the needed stent through a series of treatments.
The traditional expansion heat setting tool clamp is a conical mandrel, and the intravascular stent is expanded to a required size through the conical mandrel; when the stent is expanded by the conical mandrel, the mandrel moves relative to the intravascular stent, and the friction force between the mandrel and the intravascular stent is large, so the intravascular stent is easily damaged; in addition, the clamp model among the prior art is fixed, can't satisfy the support demand of different diameters.
Disclosure of Invention
The invention aims to solve the technical problem of providing a universal tool clamp for heat setting of metal intravascular stents, the tool clamp is not easy to abrade stents in the stent expansion process, can meet the step-by-step expansion of metal intravascular stents of various sizes, has reasonable composition, convenient operation and simple process, can realize the step-by-step expansion of the metal intravascular stents of various sizes only by replacing strut limiting strips of different sizes, and does not need to frequently disassemble, assemble and replace the clamp.
The technical scheme adopted by the invention for solving the technical problems is as follows: a universal tooling fixture for heat setting of metal vascular stents, the tooling fixture comprising: the device comprises a fixed base (1), a fixed conical support block (2), a support rod (3), a positioning support rod support frame (4), a support rod support frame (5), a sliding conical support block (6), a support rod limiting strip (7), a sliding base (8), a pin (9) and a nut (10); the method is characterized in that: the distance between the two conical support blocks is changed by the movement of the nut on the guide rod, so that the support rods move along the radial direction, and the expansion or the disassembly of the intravascular stent is realized.
The fixed base (1) is L-shaped, a pin hole (11) is formed in a vertical plate at the left end, and a guide rail (12) is arranged at the right end of the upper end plane of the bottom plate; the number of the pin holes (11) on the fixed base (1) is at least 2, and the pin holes are used for positioning and fixing the conical supporting block (2); the main body of the fixed conical supporting block (2) is conical, and is provided with a pin hole (21), a guide groove (22) and a guide rod (23), and the guide rod (23) is provided with a key (231) and a thread (232); the number of the pin holes (21) on the fixed conical supporting block (2) is the same as that of the pin holes (11) on the fixed base (1), and the number of the guide grooves (22) is 8; the fixed base (1) and the fixed conical supporting block (2) are fixed together through the pin holes (11) arranged on the fixed base and the pin holes (21) in interference fit with the pins (10).
The sliding base (8) is T-shaped, the middle part of the sliding base is provided with a vertical plate, the vertical plate is provided with a through hole (81) and a pin hole (82), and the lower end plane of the bottom plate is provided with a guide groove (83); the number of the pin holes (82) on the sliding base (8) is at least 2, and the pin holes are used for positioning and fixing the sliding conical supporting block (6); the sliding conical supporting block (6) is conical and is provided with a guide groove (61), a through hole (62) and a pin hole (63); the number of pin holes (63) on the sliding conical supporting block (6) is the same as that of pin holes (82) on the sliding base (8), and the number of guide grooves (61) is 8; the sliding conical supporting block (6) and the sliding base (8) are fixed together through the interference fit of a pin hole (63) and a pin hole (82) arranged on the sliding conical supporting block and the pin (10); the sliding conical supporting block (6) is fixed with the sliding base (8) and then is in sliding connection with the upper guide rail (12) of the fixed base (1) through the upper guide groove (83) of the sliding base (8).
The positioning support rod support frame (4) is similar to a gear in shape and is provided with a clamping groove (41), a through hole (42) and a key groove (43); the shape of the stay bar support frame (5) is similar to that of a gear, and a clamping groove (51) and a through hole (52) are arranged; the number of the clamping grooves (41) on the positioning stay bar support frame (4) is the same as that of the clamping grooves (51) on the positioning stay bar support frame (5), and the clamping grooves are 8; the supporting rods (3) are long strips, the contact surfaces of the supporting rods (3) and the vascular stent are cambered surfaces, the number of the supporting rods (3) is 8, the left end 1/4 of each supporting rod (3) is arranged in a clamping groove (41) on the positioning supporting rod supporting frame (4) in a magnetic adsorption mode, and the right end 1/4 is arranged in a clamping groove (51) on the supporting rod supporting frame (5) in a magnetic adsorption mode; 8 whole that vaulting pole (3) and location vaulting pole support frame (4), vaulting pole support frame (5) are constituteed, through locating vaulting pole support frame (4) go up through-hole (42) and vaulting pole support frame (5) go up through-hole (52) and fixed toper vaulting pole (2) go up guide arm (23) sliding connection, when installation location vaulting pole support frame (4) place one end is the one end that is close to fixed toper vaulting pole (2), and key (231) cooperate on locating vaulting pole support frame (4) last keyway (43) and the guide arm (23) of fixed toper vaulting pole (2), play the effect of location, make on fixed toper vaulting pole (2) guide slot (22) and location vaulting pole support frame (4) go up draw-in groove (41) and vaulting pole support frame (5) go up draw-in groove (51) one-to-one, and then make vaulting pole (3) one end card go into in fixed toper vaulting pole (2) go up guide slot (22).
The supporting rod limiting strips (7) are long-strip-shaped, 16 in total and divided into two groups, namely 8 groups, and the two groups are respectively arranged in the upper guide groove (22) of the fixed conical supporting block (2) and the upper guide groove (61) of the sliding conical supporting block (6) in a magnetic adsorption mode; the nut (10) is matched with a thread (232) on a guide rod (23) of the fixed conical supporting block (2). The stay bar limiting strips (7) can be replaced by different sizes so as to meet the requirement of gradual expansion of the diameter of the intravascular stent; the thread form of the thread (232) on the guide rod (23) of the fixed conical supporting block (2) is a trapezoidal thread.
The diameter of the through hole (62) on the sliding conical supporting block (6) is the same as that of the through hole (81) on the sliding base (8), and is slightly larger than that of the guide rod (23) on the fixed conical supporting block (2), so that the guide rod (23) can conveniently pass through; the length of the stay bar (3) is slightly longer than that of the processed blood vessel stent; the length of the guide rod (23) on the fixed conical supporting block (2) is far longer than that of the supporting rod (3), the length of the key (231) is 1/6 which is about the length of the guide rod (23) and is positioned at the left end of the guide rod (23), and the length of the threaded area (232) is 1/3 which is about the length of the guide rod (23) and is positioned at the right end of the guide rod (23).
The depth of the upper guide groove (22) of the fixed conical supporting block (2) is the same as that of the upper guide groove (61) of the sliding conical supporting block (6), and the depth is slightly smaller than the thickness of the stay bar limiting strip (7), so that the stay bar limiting strip (7) can be conveniently disassembled and assembled; the depth of the clamping groove (41) on the positioning support rod support frame (4) is the same as that of the clamping groove (51) on the support rod support frame (5), and the depth of the clamping groove is slightly smaller than the thickness of the support rod (3), so that the two support rod support frames are prevented from being abraded on the support.
When the universal tool clamp for heat setting of the metal vascular stent expands the vascular stent, the distance between the sliding conical supporting block and the fixed conical supporting block can be reduced through nut adjustment, so that the supporting rod radially expands, the vascular stent sleeved on the supporting rod is expanded, and the diameter of each expansion is adjusted through the supporting rod limiting strips with different sizes, so that on one hand, the requirements of stents with different diameters are met, and when the required diameters of the stents are different, the requirements of the stents with different diameters can be met only by replacing the corresponding supporting rod limiting strips; on the other hand, when the stent is expanded to a larger diameter, the work fixture disclosed by the invention is utilized to limit the movement of the stay bar step by step for multiple times by using the stay bar limiting strips with different sizes, so that the stent is gradually expanded, the stress borne in the stent expansion process is further reduced, and the risks of stent damage and cracking are reduced.
Further preferably, the number of the pin holes for connecting and fixing the fixed base and the fixed conical supporting block is at least 2, and the number of the pin holes for connecting and fixing the sliding base and the sliding conical supporting block is at least 2.
Further preferably, the diameter of the upper through hole of the sliding base and the sliding conical supporting block is slightly larger than that of the guide rod on the fixed conical supporting block, so that the guide rod can conveniently penetrate through the upper through hole.
Further preferably, the length of the support rod is slightly longer than that of the processed blood vessel stent;
it is further preferred that the length of the guide rod on the fixed conical supporting block is far longer than that of the supporting rod, the length of the key is 1/6 which is about the length of the guide rod and is positioned at the left end of the guide rod, and the length of the threaded area is 1/3 which is about the length of the guide rod and is positioned at the right end of the guide rod.
Further preferably, in order to avoid the polygonal effect of the cylindrical vessel stent during the expansion process as much as possible and reduce the processing difficulty, the number of the struts is 8, preferably 6-10.
Further preferably, the number of the guide grooves on the fixed conical supporting block and the sliding conical supporting block is the same as that of the supporting rods; the number of the clamping grooves on the positioning stay bar support frame and the stay bar support frame is the same as that of the stay bars; the number of the stay bar limiting strips is twice that of the stay bars.
Further preferably, the strut spacing strips can be replaced with different sizes to meet the gradual expansion of the blood vessel stent.
Further preferably, the depth of the upper guide groove of the fixed conical supporting block is the same as that of the upper guide groove of the sliding conical supporting block, and the upper guide groove is slightly smaller than the thickness of the stay bar limiting strip, so that the stay bar limiting strip can be conveniently disassembled and assembled; the depth of the clamping groove in the positioning support rod supporting frame is the same as that of the clamping groove in the support rod supporting frame, and the clamping groove is slightly smaller than the thickness of the support rod, so that the two support rod supporting frames are prevented from being abraded on the support.
Further preferably, the thread profile on the guide rod of the fixed conical supporting block is a trapezoidal thread, preferably a rectangular thread, a trapezoidal thread and a zigzag thread, so that the nut can linearly move along the guide rod to push the sliding base to move on the guide rail of the fixed base.
Further preferably, the nut and the sliding base are detachable, so that the blood vessel support is convenient to mount and dismount.
The invention can push the sliding base and the sliding conical supporting block fixed on the sliding base to move towards the fixed conical supporting block by utilizing the movement of the nut on the guide rod, so that the distance between the sliding conical supporting block and the fixed conical supporting block is reduced, the supporting rod further moves outwards to prop open the vascular stent sleeved on the supporting rod, the supporting rod moves along the radial direction under the limitation of the guide groove of the fixed conical supporting block and the guide groove of the sliding conical supporting block, the radial expansion action of the vascular stent is realized, the subsequent heat setting treatment is convenient, the diameter of each expansion can be adjusted by replacing the limiting strips of the supporting rods with different sizes, and the requirements of the vascular stents with different diameters and the vascular stents with large diameters on step-by-step expansion are met.
The invention has the beneficial effects that: the requirements of different-diameter vascular stents and large-diameter vascular stents for stepwise expansion can be met only by replacing the strut limiting strips with different sizes, a plurality of size structures are not needed, the composition is reasonable, the manufacture is simple, and the operation is convenient; the 8 support rods are expanded simultaneously, so that the polygonal effect of the cylindrical intravascular stent in the expansion process is reduced as much as possible under the condition of low processing difficulty; the stay bar and the stay bar limiting strip are installed in a magnetic adsorption mode, so that the installation is simple, and the disassembly and the replacement are convenient.
Drawings
FIG. 1 is a schematic structural view of a tooling fixture according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a fixing base according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a stationary tapered spacer according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a sliding base according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a sliding tapered spacer according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a pin in an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a strut stopper according to an embodiment of the present invention;
FIG. 8 is a schematic view of the assembly of the stationary base, stationary tapered brace, brace bar stop and pin in an embodiment of the present invention;
FIG. 9 is a schematic view of the structure of the sliding base, the sliding tapered brace, the brace stop and the pin assembly according to the embodiment of the present invention;
FIG. 10 is a schematic structural view of a positioning brace support and a brace support according to an embodiment of the present invention;
FIG. 11 is a schematic structural view of a brace bar in an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a positioning brace support frame, a brace support frame and a brace assembly according to an embodiment of the present invention.
The numbers in the figures illustrate the following:
1-fixing a base; 11-pin holes; 12-a guide rail;
2-fixing the conical supporting block; 21-pin holes; 22-a guide groove; 23-a guide rod; a 231-bond; 232-thread;
3-a brace rod;
4-positioning the brace rod support frame; 41-card slot; 42-a through hole; 43-a keyway;
5-a brace rod support frame; 51-a card slot; 52-a through hole;
6-sliding the conical supporting block; 61-a guide groove; 62-a through hole; 63-pin holes;
7-stay bar limit strip;
8-a sliding base; 81-through holes; 82-pin holes; 83-a guide groove;
9-pin;
10-nut.
Detailed Description
In the following, only certain exemplary embodiments are described briefly; 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", "left end", "right end", "outer", etc. indicate orientations or positional relationships based on those 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 device or element 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; in the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounting," "fitting," "connecting," "fixing," and the like are to be broadly construed, and specific meanings of the above terms in the embodiments of the present invention may be understood by those skilled 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.
Different structures 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.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As can be seen from fig. 1 to 12, a universal tooling fixture for heat setting of a metal blood vessel stent comprises a fixed base 1, a fixed conical supporting block 2, a supporting rod 3, a positioning supporting rod supporting frame 4, a supporting rod supporting frame 5, a sliding conical supporting block 6, a supporting rod limiting strip 7, a sliding base 8, a pin 9 and a nut 10.
As shown in fig. 2, the left end of the fixed base 1 is provided with a vertical plate, and the vertical plate is provided with a pin hole 11 for connecting with the fixed conical supporting block 2; the right end of the upper end plane of the bottom plate of the fixed base 1 is provided with a guide rail 12, and the length of the guide rail approximately accounts for 1/2 of the fixed base; it should be noted that the length of the guide rail 12 given in the present embodiment is only a reference range, and it is within the scope of the present invention as long as the normal operation of the universal fixture can be achieved.
As shown in fig. 3, the length of the guide rod 23 on the fixed conical supporting block 2 is much longer than that of the supporting rod 3, the length of the key 231 is 1/6 which is about the length of the guide rod, the key is arranged at the left end of the guide rod, the length of the threaded 232 area is 1/3 which is about the length of the guide rod, and the key is arranged at the right end of the guide rod 23; it should be noted that the lengths of the guide rod 23, the key 231 and the thread 232 are only given as reference ranges in the present embodiment, and it is within the scope of the present invention as long as the normal operation of the universal fixture can be achieved.
As shown in fig. 4, a vertical plate is arranged in the middle of the sliding base 8, a through hole 81 and a pin hole 82 are arranged on the vertical plate, the distance from the through hole 81 to the lower end plane of the bottom plate of the sliding base 8 is the same as the distance from the guide rod 23 on the fixed conical supporting block 2 to the upper end plane of the bottom plate of the fixed base 1, and the pin hole 82 is used for connecting with the sliding conical supporting block 6; the lower end plane of the bottom plate of the sliding base 8 is provided with a guide rail 83.
As shown in fig. 5, the sliding tapered stay is provided with a guide groove 61, a through hole 62, and a pin hole 63.
As shown in fig. 6, the pin 9 is a cylindrical metal member, and the diameter of the pin 9 should be the same as the diameters of the pin holes 11, 21, 63, and 82.
As shown in fig. 7, the width of the stay bar 7 should be the same as the width of the guide grooves 22 and 61.
As shown in fig. 8 and 9, the fixed conical supporting block 2 is mounted on the fixed base 1 through a pin 9, the sliding conical supporting block 6 is mounted on the sliding base 8 through a pin 9, and the supporting rod limiting bars 7 are respectively mounted in the guide grooves 22 and 61 of the fixed conical supporting block 2 and the sliding conical supporting block 6 in a magnetic adsorption manner, so as to limit the movement of the supporting rods 3 and ensure the synchronization of the supporting rods 3;
as shown in fig. 9, the diameter of the through hole 62 on the sliding conical supporting block 6 is the same as that of the through hole 81 on the sliding base 8, and is slightly larger than that of the guide rod 23 on the fixed conical supporting block 2, so that the guide rod 23 can pass through the through hole.
As shown in fig. 10, the positioning brace rod support frame 4 is provided with a clamping groove 41, a through hole 42 and a key groove 43; the brace rod support frame 5 is provided with a clamping groove 51 and a through hole 52;
as shown in fig. 11, the stay bar 3 is a long and thin bar, and chamfers are arranged at two ends of the stay bar to increase the contact area with the guide grooves 22 and 61 and reduce the pressure; and the contact surface of the stay bar and the blood vessel support is a cambered surface.
It should be noted that the thread 232 on the guide rod 23 of the fixed tapered supporting block 2 is not limited, and may be a rectangular thread, a trapezoidal thread, or a zigzag thread, as long as the nut 10 can move linearly along the guide rod 23 to push the sliding base 8 to move on the guide rail 12 of the fixed base 1, so as to achieve the radial expansion function of the supporting rod 3, and all such threads are within the scope of the present invention.
As shown in fig. 12, the number of the stay bars 3 is 8, the left end 1/4 of each stay bar is installed in the slot 41 on the positioning stay bar support frame 4 in a magnetic adsorption manner, and the right end 1/4 is installed in the slot 51 on the stay bar support frame 5 in a magnetic adsorption manner; the length of the stay bar 3 is slightly longer than that of the processed blood vessel stent.
The specific implementation mode of the invention is as follows:
1. fixing the fixed base 1 and the fixed conical supporting block 2 together through the interference fit of the pin hole 11, the pin hole 21 and the pin 9 arranged on the fixed base;
2. fixing the sliding conical supporting block 6 and the sliding base 8 together through the interference fit of the pin hole 63, the pin hole 82 and the pin 9 arranged on the sliding conical supporting block;
3. dividing 16 brace limiting strips 7 with the same size into two groups, namely 8 brace limiting strips, wherein the two groups are respectively arranged in the guide groove 22 on the fixed conical support block 2 and the guide groove 61 on the sliding conical support block 6 in a magnetic adsorption mode;
4. the 1/4 positions at the left ends of the 8 support rods 3 are respectively installed in the clamping grooves 41 on the positioning support rod support frame 4 in a magnetic adsorption mode, and the 1/4 positions at the right ends are installed in the clamping grooves 51 on the support rod support frame 5 in a magnetic adsorption mode;
5. the whole body formed by 8 support rods 3, a positioning support rod support frame 4 and a support rod support frame 5 in the step 4 is connected with a guide rod 23 on a fixed conical support block 2 in a sliding way through a through hole 42 on the positioning support rod support frame 4 and a through hole 52 on the support rod support frame 5, one end of the positioning support rod support frame 4 is close to one end of the fixed conical support block 2 when the positioning support rod support frame is installed, a key groove 43 on the positioning support rod support frame 4 is matched with a key 231 on the guide rod 23 of the fixed conical support block 2, so that the guide grooves 22 on the fixed conical support block 2 correspond to the clamping grooves 41 on the positioning support rod support frame 4 and the clamping grooves 51 on the support rod support frame 5 one by one, and one end of each support rod 3 is clamped into the guide groove 22 on the fixed conical support block 2;
6. sleeving the vascular stent to be expanded outside the 8 support rods 3;
7. placing the sliding base 8 provided with the strut limiting strips 7 and the sliding conical supporting blocks 6 in the step 2 on the guide rails 12 of the fixed base 1, and pushing the sliding base 8 to enable the other ends of the struts 3 to be correspondingly clamped in the guide grooves 61 of the sliding conical supporting blocks 6;
8. matching the nut 10 with the thread 232 on the guide rod 23 of the fixed conical supporting block 2;
9. the nut 10 is rotated to move towards the fixed conical supporting block 2 along the guide rod 23, the sliding base 8 is pushed, the distance between the sliding conical supporting block 6 and the fixed conical supporting block 2 is reduced, the supporting rod 3 is further expanded along the radial direction, and the vascular stent sleeved on the supporting rod 3 is expanded until two ends of the supporting rod 3 are contacted with the supporting rod limiting strip 7;
10. placing the vascular stent and the clamp in a high-temperature furnace for heat setting;
11. replacing the strut limiting strips 7 with different sizes, and repeating the steps 9-10 to realize the gradual expansion of the diameter of the intravascular stent;
12. the nut 10 and the sliding base 8 are removed, and the blood vessel support after heat treatment can be taken down.
The invention can gradually expand the diameter of the blood vessel stent to the ideal diameter as required only by replacing the strut limiting strips with different sizes, simultaneously meets the requirement of blood vessel expansion with different diameters, has reasonable composition, convenient operation and simple process, and can realize the heat treatment and the shaping of the blood vessel stent.
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. A universal tooling fixture for heat setting of metal vascular stents, the tooling fixture comprising: the device comprises a fixed base (1), a fixed conical support block (2), a support rod (3), a positioning support rod support frame (4), a support rod support frame (5), a sliding conical support block (6), a support rod limiting strip (7), a sliding base (8), a pin (9) and a nut (10); the method is characterized in that:
the fixed base (1) is L-shaped, a pin hole (11) is formed in a vertical plate at the left end, and a guide rail (12) is arranged at the right end of the upper end plane of the bottom plate;
the main body of the fixed conical supporting block (2) is conical, and is provided with a pin hole (21), a guide groove (22) and a guide rod (23), and the guide rod (23) is provided with a key (231) and a thread (232);
the sliding base (8) is T-shaped, the middle part of the sliding base is provided with a vertical plate, the vertical plate is provided with a through hole (81) and a pin hole (82), and the lower end plane of the bottom plate is provided with a guide groove (83); the sliding conical supporting block (6) is conical and is provided with a guide groove (61), a through hole (62) and a pin hole (63);
the positioning support rod support frame (4) is similar to a gear in shape and is provided with a clamping groove (41), a through hole (42) and a key groove (43); the shape of the stay bar support frame (5) is similar to that of a gear, and a clamping groove (51) and a through hole (52) are arranged; the number of the support rods (3) is 8, and the contact surface of the support rods (3) and the vascular stent is an arc surface;
the supporting rod limiting strips (7) are long-strip-shaped, 16 in total and divided into two groups, namely 8 groups, and the two groups are respectively arranged in the upper guide groove (22) of the fixed conical supporting block (2) and the upper guide groove (61) of the sliding conical supporting block (6) in a magnetic adsorption mode; the nut (10) is matched with a thread (232) on a guide rod (23) of the fixed conical supporting block (2);
the diameter of the through hole (62) on the sliding conical supporting block (6) is the same as that of the through hole (81) on the sliding base (8), and is slightly larger than that of the guide rod (23) on the fixed conical supporting block (2), so that the guide rod (23) can conveniently pass through;
the depth of the upper guide groove (22) of the fixed conical supporting block (2) is the same as that of the upper guide groove (61) of the sliding conical supporting block (6), and the depth is slightly smaller than the thickness of the supporting rod limiting strip (7), so that the supporting rod limiting strip (7) can be conveniently disassembled and assembled.
2. The universal tool clamp for heat setting of the metal blood vessel stent as claimed in claim 1, wherein: the number of the pin holes (11) on the fixed base (1) is at least 2, and the pin holes are used for positioning and fixing the conical supporting block (2); the number of the pin holes (21) on the fixed conical supporting block (2) is the same as that of the pin holes (11) on the fixed base (1), and the number of the guide grooves (22) is 8.
3. The universal tool clamp for heat setting of the metal blood vessel stent as claimed in claim 1 or 2, wherein: the fixed base (1) and the fixed conical supporting block (2) are fixed together through the pin holes (11) arranged on the fixed base and the pin holes (21) in interference fit with the pins (10).
4. The universal tool clamp for heat setting of the metal blood vessel stent as claimed in claim 1, wherein: the number of the pin holes (82) on the sliding base (8) is at least 2, and the pin holes are used for positioning and fixing the sliding conical supporting block (6); the number of the pin holes (63) on the sliding conical supporting block (6) is equal to that of the pin holes (82) on the sliding base (8), and the number of the guide grooves (61) is 8.
5. The universal tool clamp for heat setting of the metal blood vessel stent as claimed in claim 1 or 4, wherein: the sliding conical supporting block (6) and the sliding base (8) are fixed together through the interference fit of the pin hole (63) and the pin hole (82) arranged on the sliding conical supporting block and the pin (10).
6. The universal tool clamp for heat setting of the metal vascular stent as claimed in claim 5, wherein: the sliding conical supporting block (6) is fixed with the sliding base (8) and then is in sliding connection with the upper guide rail (12) of the fixed base (1) through the upper guide groove (83) of the sliding base (8).
7. The universal tool clamp for heat setting of the metal blood vessel stent as claimed in claim 1, wherein: the number of the clamping grooves (41) on the positioning stay bar support frame (4) is the same as that of the clamping grooves (51) on the stay bar support frame (5), and the clamping grooves are 8; the depth of the clamping groove (41) in the positioning support rod support frame (4) is the same as that of the clamping groove (51) in the support rod support frame (5), and the depth of the clamping groove is slightly smaller than the thickness of the support rod (3), so that the two support rod support frames are prevented from being worn by the support.
8. The universal tool clamp for heat setting of the metal blood vessel stent as claimed in claim 1, wherein: the number of the support rods (3) is 8, the left end 1/4 of each support rod (3) is arranged in a clamping groove (41) on the positioning support rod support frame (4) in a magnetic adsorption mode, and the right end 1/4 is arranged in a clamping groove (51) on the support rod support frame (5) in a magnetic adsorption mode; the length of the stay bar (3) is slightly longer than that of the processed blood vessel stent; the length of the guide rod (23) on the fixed conical supporting block (2) is far longer than that of the supporting rod (3), the length of the key (231) is 1/6 of the length of the guide rod (23) and is positioned at the left end of the guide rod (23), and the length of the thread (232) area is 1/3 of the length of the guide rod (23) and is positioned at the right end of the guide rod (23).
9. The universal tooling fixture for heat setting of metal vascular stents as recited in claim 8, wherein: 8 whole that vaulting pole (3) and location vaulting pole support frame (4), vaulting pole support frame (5) are constituteed, through locating vaulting pole support frame (4) go up through-hole (42) and vaulting pole support frame (5) go up through-hole (52) and fixed toper vaulting pole (2) go up guide arm (23) sliding connection, when installation location vaulting pole support frame (4) place one end is the one end that is close to fixed toper vaulting pole (2), and key (231) cooperate on locating vaulting pole support frame (4) last keyway (43) and the guide arm (23) of fixed toper vaulting pole (2), play the effect of location, make on fixed toper vaulting pole (2) guide slot (22) and location vaulting pole support frame (4) go up draw-in groove (41) and vaulting pole support frame (5) go up draw-in groove (51) one-to-one, and then make vaulting pole (3) one end card go into in fixed toper vaulting pole (2) go up guide slot (22).
10. The universal tool clamp for heat setting of the metal blood vessel stent as claimed in claim 1, wherein: the stay bar limiting strips (7) can be replaced by different sizes so as to meet the requirement of gradual expansion of the diameter of the intravascular stent; the thread form of the thread (232) on the guide rod (23) of the fixed conical supporting block (2) is a trapezoidal thread.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111202580.9A CN114101504B (en) | 2021-10-15 | 2021-10-15 | Universal fixture for heat setting of metal vascular stent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111202580.9A CN114101504B (en) | 2021-10-15 | 2021-10-15 | Universal fixture for heat setting of metal vascular stent |
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| CN114101504A true CN114101504A (en) | 2022-03-01 |
| CN114101504B CN114101504B (en) | 2024-01-23 |
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Cited By (1)
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| CN114101504B (en) | 2024-01-23 |
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