CN210523629U - Fixture for heat setting of NiTi alloy intravascular stent - Google Patents
Fixture for heat setting of NiTi alloy intravascular stent Download PDFInfo
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- CN210523629U CN210523629U CN201920977641.0U CN201920977641U CN210523629U CN 210523629 U CN210523629 U CN 210523629U CN 201920977641 U CN201920977641 U CN 201920977641U CN 210523629 U CN210523629 U CN 210523629U
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- fan
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Abstract
The utility model belongs to the mould field of stamping workpiece relates to a NiTi alloy frock clamp for vascular support heat setting specifically is a NiTi alloy pipe diameter expands and props device. Its major structure includes: the device comprises a base frame, a butt-joint round table, a support column, a detachable trapezoid groove lining chuck, a fan-shaped lining, a supporting head, a push rod, a handle and a counter-force spring. The tool clamp base frame and the opposite-top round platform are integrated, and 3 supporting columns are fixed on the opposite-top round platform and used for supporting the trapezoidal groove gasket chuck; the detachable dovetail groove lining chuck is mainly provided with a dovetail groove for fixing the lining and limiting the moving direction of the lining to enable the lining to move radially; the facing is composed of 8 fan-shaped sheets to ensure the even circumferential stress of the propped-open bracket, and is mainly characterized in that the support is radially propped-open along the trapezoidal groove. The dovetail groove facing chuck and the fan-shaped facing of the main body opening part of the tool clamp device can be detached at any time as a whole, and the supporting heads with different diameters can be replaced at any time according to required sizes. The device has simple structure and convenient operation, and can uniformly apply pressure to the NiTi alloy pipe, thereby ensuring uniform wall thickness after expanding.
Description
Technical Field
The invention belongs to the field of dies for stamping parts, relates to a tool clamp for heat setting of a NiTi alloy intravascular stent, and particularly relates to a diameter expanding device for a NiTi alloy tube.
Background
People living in modern society have become common clinical diseases due to high living pressure, irregular work and rest, unhealthy diet and the like, and have stricter requirements on the diameter and the precision of a vascular stent along with the development of vascular stent interventional therapy, in particular to the heat setting treatment process of the NiTi alloy vascular stent.
In current strutting arrangement, the diameter range that can strut tubular product is limited to often can be along with axial and circumference atress inequality at the in-process that struts, often appear holistic inhomogeneous phenomenon of pipe wall at the in-process that exerts pressure, pipe wall crackle can appear even in some, has seriously influenced the quality of product. The utility model with chinese patent application No. 200520009946.0 discloses a flangeless ironing device for cylindrical parts. Mainly solves the problem of thinning of the cylindrical part. But does not address the problems of size, and uniform thinning.
Therefore, it is necessary to find a tool clamp for heat setting of the NiTi alloy intravascular stent, which can realize expansion and uniform expansion of multiple diameters.
Disclosure of Invention
The utility model discloses an invention aims at overcoming the shortcoming that prior art exists, seeks to design one kind and can effectively strut different diameter size NiTi alloy vascular support to make the support be the NiTi alloy vascular support frock clamp for the heat setting that evenly expands, evenly thins at axial and circumference in the process of strutting.
In order to achieve the above object, the main structure of the fixture for heat setting of the NiTi alloy intravascular stent of the present invention comprises: the device comprises a base frame, a butt-against circular truncated cone, a support column, a detachable dovetail groove lining chuck, a fan-shaped lining, a supporting head, a push rod, a handle and a counter-force spring; the supporting head is pushed by the push rod to be pressed into the central position of the gasket to push the gasket to the radial direction, and the supporting head is gradually pushed to be in contact with the central position of the dovetail groove gasket chuck, so that the purpose of uniform axial and circumferential expansion of the support is achieved.
The bed frame is an overall structure with the countertop round platform, is fixed with 3 spinal branch posts on the countertop round platform and is used for supporting removable dovetail groove facing chuck, is equipped with trapezoidal slot on the chuck, makes the facing not take place to drop, and limits the moving direction of facing, guarantees the facing along radial displacement.
The spreading part (the detachable dovetail groove lining chuck and the fan-shaped lining) consists of 8 fan-shaped linings, the cross section of each lining is fan-shaped, a dovetail groove is formed in one end of each lining and can be hung on the dovetail groove lining chuck, the thickest part of each lining is 0.5mm, and the NiTi alloy pipe is uniformly pressed, so that the wall thickness is uniform after spreading.
The centers of the force application part supporting head, the push rod, the opposite-top round table and the trapezoid-shaped groove lining chuck are positioned on the same axis, wherein the supporting head and the push rod are assembled by threads, and the supporting heads with different diameters can be replaced according to the required diameter of the support. The center of the trapezoid groove gasket chuck is a central hole with the diameter of 3.4mm so as to buffer the cone part of the conical supporting head and prevent uneven axial stress.
A counter-force spring is arranged between the push rod of the force application part and the tailstock, so that the push rod is in a standby working state at any time, the push rod pushes the support head to slide across the whole fan-shaped gasket, the support is uniformly expanded, and the counter-force spring helps the handle to reset after the expansion is finished.
Compared with the prior art, the utility model, this device simple structure, convenient operation, can change different diameter stay heads at any time according to the size of needs, and fan-shaped facing is even to NiTi alloy pipe applanation, and the wall thickness is even after expanding and propping.
Drawings
FIG. 1 is a front view of a fixture structure for heat-setting a NiTi alloy stent of the present invention;
FIG. 2 is a structural plan view of the clamp for heat setting of the NiTi alloy intravascular stent of the present invention;
FIG. 3 is a schematic view of the dovetail groove lining chuck of the present invention;
FIG. 4 is a schematic view of the construction of the lining according to the present invention;
figure 5 is a radial cross-sectional view of a fan liner.
In the figure: the novel tailstock comprises a base frame, 2-opposite truncated cones, 3-3 supporting columns, 4-trapezoidal groove gasket chucks, 5-gaskets, 6-supporting heads, 7-push rods, 8-fixing sheaths, 9-counter force springs, 10-handles, 11-threads, 12-tailstocks, 13-tailstock fixing bolts, 14-trapezoidal grooves and 15-trapezoidal guide pins.
Detailed Description
The invention is further illustrated by the following specific examples and the accompanying drawings.
Example 1:
this embodiment NiTi alloy frock clamp for vascular support heat setting, the major structure includes: the device comprises a base frame 1, a butting circular table 2, a support column 3, a trapezoidal groove lining chuck 4, a fan-shaped lining 5, a supporting head 6, a push rod 7, a fixing sheath 8, a reaction spring 9, a handle 10, threads 11, a tailstock 12, a tailstock fixing bolt 13, a trapezoidal groove 14 and a trapezoidal guide pin 15. The base frame 1 is connected with the opposite top round table 2; the opposite top round platform 2 and the dovetail groove lining chuck 4 are assembled by a support 3; one end of the lining 5 is guided by a trapezoidal guide pin 15 and is assembled on the trapezoidal groove lining chuck 4; the supporting head 6 is assembled with the push rod 7, and the push rod 7 is connected with the handle 10 and fixed on the tailstock 12.
The number of the support columns 3 is 3, the support columns are circumferentially and uniformly distributed on the opposite round platforms 2, one end of each support column is fixed on the opposite round platforms 2, the other end of each support column is connected with the dovetail groove lining chuck 4, and the connection position of the support columns is detachable; the dovetail groove lining chuck 4 is provided with a dovetail groove 14; the left end of the push rod 7 is provided with threads which are connected with the support head 6 through threads; eight fan-shaped linings 5 are provided, the radian of the fan-shaped linings is 45 degrees, the thickest part is 0.5mm, the length of the linings 5 is 80mm, and the outer diameter of the linings is 4mm when the linings are not spread; the support head 6 is a conical support head and consists of a guide part with the front end diameter of 3mm and a rear end expanding part.
Example 2:
the main structure of the tooling fixture for heat setting of the NiTi alloy intravascular stent described in this embodiment is the same as that of embodiment 1, and this embodiment is mainly used for describing the working method and the test range thereof.
The fixture structure for heat setting of the NiTi alloy intravascular stent described in this embodiment can be classified into a base frame part, a distraction part and a force application part. The pedestal part mainly comprises: the device comprises a base frame 1, a butt-against circular truncated cone 2 and a support 3; the distraction part mainly comprises: a trapezoid-groove lining chuck 4, a fan-shaped lining 5 and a supporting head 6; the force application part mainly comprises: push rod 7, fixed sheath 8, reaction spring 9, handle 10. The trapezoid grooves on the trapezoid groove lining chuck 4 are detachable from the support 3, the longest length of the trapezoid grooves on the trapezoid groove lining chuck 4 is 20mm, the length of the lining 5 is 80mm, the outer diameter is 4mm, and the spreading range is 4mm-20 mm.
According to the frock clamp for heat setting of the NiTi alloy intravascular stent, when the frock clamp is used, the NiTi alloy stent is sleeved on the lining, the thread 11 of the push rod 7 is replaced with the support head 6 with the required size, the handle 10 is pulled backwards to extrude the counter force spring 9, and the support head gradually penetrates from the inlet of the lining to achieve the purpose of supporting the NiTi alloy intravascular stent. The fan-shaped gasket 5 can uniformly diffuse along the radial direction of the trapezoidal groove under the action of the conical support head 6, so that the whole circumferential direction of the bracket is arc-shaped, the fan-shaped gasket uniformly presses the NiTi alloy pipe, and the wall thickness is uniform after expansion. The handle 10 is pushed to axially advance to drive the support head to complete expansion of the NiTi alloy tube, and the counter force spring can help the NiTi alloy tube to reset after expansion.
Claims (5)
1. The utility model provides a NiTi alloy frock clamp for vascular support heat setting which characterized in that major structure includes: its major structure includes: the device comprises a base frame, a butt-against circular truncated cone, a support column, a detachable dovetail groove lining chuck, a fan-shaped lining, a supporting head, a push rod, a handle and a counter-force spring; the pedestal is connected with the opposite-top round table, and the opposite-top round table and the trapezoid groove gasket chuck are assembled by three supporting columns; one end of the lining is guided by a guide pin and is assembled on the dovetail groove lining chuck; the supporting head is assembled with the push rod, the push rod is connected with a handle and fixed on the tailstock, the handle is pushed to axially advance to drive the supporting head to complete expanding of the NiTi alloy tube, and the counter-force spring can reset the NiTi alloy tube after expanding is completed.
2. The tool clamp for heat setting of a NiTi alloy stent as claimed in claim 1, wherein the base frame is integrated with the opposite truncated cone, 3 pillars are fixed on the opposite truncated cone for supporting the chuck of the detachable trapezoidal groove lining, and the chuck is provided with trapezoidal grooves, so that the lining does not fall off and the moving direction of the lining is limited.
3. A tool clamp for heat setting of a NiTi alloy vascular stent as in claim 1, wherein the fan-shaped liner is composed of 8 fan-shaped liners, the cross section of the liner is fan-shaped, and the NiTi alloy tube is uniformly pressed, so that the uniform wall thickness after expansion is ensured.
4. The tooling clamp for heat setting of the NiTi alloy intravascular stent of claim 1, wherein the centers of the supporting head, the push rod, the opposite truncated cone and the trapezoid groove gasket chuck are positioned on the same axis, wherein the supporting head and the push rod are assembled by screw threads, and the supporting heads with different diameters can be replaced according to the required stent diameter.
5. The tool clamp for heat setting of the NiTi alloy intravascular stent as claimed in claim 1, wherein a reaction spring is arranged between the push rod and the tailstock, so that the push rod is in a standby state at any time, the push rod pushes the support head to slide across the whole fan-shaped gasket, so as to ensure that the stent is uniformly expanded, and the reaction spring helps the handle to reset after the expansion is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920977641.0U CN210523629U (en) | 2019-06-26 | 2019-06-26 | Fixture for heat setting of NiTi alloy intravascular stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920977641.0U CN210523629U (en) | 2019-06-26 | 2019-06-26 | Fixture for heat setting of NiTi alloy intravascular stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210523629U true CN210523629U (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920977641.0U Expired - Fee Related CN210523629U (en) | 2019-06-26 | 2019-06-26 | Fixture for heat setting of NiTi alloy intravascular stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210523629U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112476289A (en) * | 2020-11-30 | 2021-03-12 | 内蒙古工业大学 | A frock clamp for nifi alloy vascular support heat setting |
| CN113857399A (en) * | 2021-09-14 | 2021-12-31 | 北京永益润成科技有限公司 | Blood vessel support heat setting positioner |
-
2019
- 2019-06-26 CN CN201920977641.0U patent/CN210523629U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112476289A (en) * | 2020-11-30 | 2021-03-12 | 内蒙古工业大学 | A frock clamp for nifi alloy vascular support heat setting |
| CN113857399A (en) * | 2021-09-14 | 2021-12-31 | 北京永益润成科技有限公司 | Blood vessel support heat setting positioner |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200515 |
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| CF01 | Termination of patent right due to non-payment of annual fee |