A kind of shaper of memory alloy stent ring and processing method for shaping
Technical field
The invention belongs to technical field of medical instruments, more particularly, to a kind of memory conjunction being applied to memorial alloy intravascular stent
The shaper of golden support ring and processing method for shaping.
Background technology
Arotic disease particularly aortic aneurysm is a kind of serious threat patient vitals, the high cardiovascular injuries of fatality rate
Emergency case.According to statistics, non-therapist 5 annual death rate is 50%~76%, and the mortality rate of the person that merges heart and lung diseases is up to 93%.90
Before age, surgical operation is the main method for the treatment of arotic disease, but this operation method wound is big, operating time
Length, complication are many, mortality rate is high, and thoracoabdominal aortic aneurysm operative mortality reaches 5%~26%, and paraplegia incidence rate is 4.6%.In recent years
Come, with the development of Micro trauma interventional therapeutic technique, endoluminal vascular support graft exclusion treatment arotic disease is able to widely should
Have with, this operation method that wound is little, go out insufficiency of blood, the traditional surgery such as treatment time is short, good effect, repeatable treatment
The unrivaled advantage of method.Using intravascular stent delivery device, intravascular stent is sent into diseased region, made by intravascular stent
The blood flow of interlayer or tumor intracavity disappears, and forms thrombosis, hereafter gradually absorbs or isolation pathological changes, to reach treatment arotic disease
Purpose.
Memorial alloy intravascular stent is softer at 0 DEG C~10 DEG C, arbitrarily can change shape within the specific limits, and energy side
Just, it is readily integrated in delivery device.By delivery device by the diseased region of stent pushing to patient, under human body temperature, blood vessel
Stent-expansion, resile, be in close contact with blood vessel wall, and certain radial support power is produced on blood vessel wall, controlled with reaching
The purpose treated.
Memorial alloy intravascular stent is formed by memory alloy stent ring and overlay film, and support ring is located at mount proximal end by one
Naked frame become with some main body rack ring groups of overlay film part.At present, the naked frame on market and support ring are by memory alloy pipes
Material forms through laser engraving or the braiding of memorial alloy silk material.The support ring of memorial alloy silk material braiding is open loop, and needs are remembered
Recall alloy spring winding method or stainless steel tube crimping mode two heads are connected in one, exist bonding strength poor, shaping
The problems such as property is poor, compression diameter is big;Although avoided above-mentioned by the support ring of memorial alloy tubing laser engraving or naked frame
Problem, but memorial alloy tubing is expensive, rapid laser carving high cost, has raised the cost of support.
Content of the invention
For the problems referred to above, the present invention propose a kind of can avoid silk material braided support ring exist bonding strength
While the various drawback such as low, formability is poor, compression diameter is big, and reduce material cost and processing cost, and improve plus
The shaper of memory alloy stent ring and the processing method for shaping that are applied to memorial alloy intravascular stent of work efficiency rate.
A kind of shaper of memory alloy stent ring, including:Surface is provided with the die main body of pin, located at described mould
The disk of lifting of tool body top engages the push rod being connected and along described die main body table with the screwed hole at described die main body top
The drag hook that the gathering sill in face slides, one end of described drag hook be hooked in described in lift disk, described push rod passes through in rotary moving, and carries
Lift disk described in dynamic to rise or decline, thus driving described drag hook to slide up or down along described gathering sill, pin and guiding
Groove is arranged alternately for interval, and the quantity of drag hook, pin, gathering sill is N, and N is the positive integer more than or equal to 2.
For strutting memorial alloy sheet material by being stamped or cut out the support ring that mode obtains, support ring is alternately fixed on
Between pin and drag hook.
Described support ring is circle or the n side shape of closing, and n is the even number more than or equal to 4.
Alternate successively on n interior angle of described n side shape be provided with n/2 agnail, be provided with cushion block in described gathering sill, lead to
Cross the inclined-plane of cushion block by agnail jack-up.
Described shaper is divided into taper shaper and cylindricality shaper according to the shape of described support ring.
Described pin is uniformly distributed circumferentially in the cylinder of described die main body or the conical surface, and described gathering sill is in described mould
Main body cylinder or the conical surface are uniformly distributed circumferentially, and N number of described pin is along the circumferential direction staggered with N number of described gathering sill.
Described drag hook is slice-shaped part, and its thickness is less than the guiding well width of described die main body;Described drag hook includes
Pull bar and be arranged on the wedge-shaped slot on described pull bar surface, the wedge-shaped slot on described drag hook be hooked in described in lift on disk wedge shape
Face, the pull bar of the described drag hook n exterior angle hook angular with n.
Light bar segment that described push rod includes being slidably matched with the described mesopore lifting disk from top to bottom successively, it is used for supporting institute
State the boss lifting disk and the thread segment using cooperatively with the screwed hole on described die main body.
A kind of memory alloy stent ring processing method for shaping based on shaper described in claim 1, walks including following
Suddenly:
With memorial alloy sheet material by punching press or spark cutting mode machining support ring;
Described support ring is set in described shaper surface, and cooperates and fix by pin and pull bar;
Described support ring is strutted as solid and is attached at described die main body by drag hook tractive and die main body are spacing
Surface becomes preliminary three-dimensional bracket ring;
By described preliminary three-dimensional bracket ring through Overheating Treatment solid shape, finally give three-dimensional bracket ring.
The preliminary three-dimensional bracket ring strutting and be fixed on shaper is set in 400-600 degree Celsius range
At a temperature of heat and be incubated time of setting, and take the type of cooling, thus support ring is shaped into three-dimensional shape.
The beneficial effects of the present invention is:The shaper of memory alloy stent ring and processing method for shaping had both avoided silk
The shortcomings of bonding strength that material braided support ring exists is low, formability is poor, compression diameter is big, swashs with memorial alloy tubing simultaneously
Light carves naked frame and support ring is compared, and reduces material cost and processing cost, improves working (machining) efficiency.
And, with memorial alloy sheet material, memory alloy stent ring is processed by punching press or spark cutting mode, such plus
Work mode is simple, and processing cost is low, high in machining efficiency.Memorial alloy sheet material is readily available compared with tubing, and the cost of material is low.By inciting somebody to action
The planar bracket ring of different size specification is arranged, and stock utilization can be greatly improved.
Brief description
Fig. 1 is not barbed five angle plane support ring schematic diagrams in the present invention.
Fig. 2 is barbed five angle plane support ring schematic diagrams in the present invention.
Fig. 3 is not barbed circular flat support ring schematic diagram in the present invention.
Fig. 4 a is conical stent ring sizing taper shaper schematic diagram in the present invention.
Fig. 4 b is cylindrical stent ring sizing cylindricality shaper schematic diagram in the present invention.
Fig. 5 a is the structural representation for taper die main body for the die main body of shaper in the present invention.
Fig. 5 b is the structural representation for cylindrical mold main body for the die main body of shaper in the present invention.
Fig. 6 is the drag hook schematic diagram of shaper in the present invention.
Fig. 7 is the push rod schematic diagram of shaper in the present invention.
Fig. 8 be the present invention in shaper lift disk schematic diagram.
Fig. 9 is the cushion block schematic diagram of shaper in the present invention.
Figure 10 a is cylindrical stent ring sizing schematic diagram in the present invention.
Figure 10 b is conical stent ring sizing schematic diagram in the present invention.
Figure 11 a is the finished product schematic diagram of cylindrical no agnail support ring in the present invention.
Figure 11 b is the conical finished product schematic diagram with agnail support ring in the present invention.
Figure 12 is that midplane support ring of the present invention processes arrangement schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawings, embodiment is elaborated.
The shaper of memory alloy stent ring provided in an embodiment of the present invention is used for for memorial alloy sheet material passing through punching press
Or the planar bracket central shoring that cutting mode obtains opens as three-dimensional bracket ring.Wherein, described memorial alloy sheet material is run after fame adopted composition
The NiTi memorial alloy of 54.5wt%-57.0wt%Ni, and described memorial alloy sheet material can be rectangle can also be circular, thick
Spend for 0.1mm-2mm.In the present embodiment, described memorial alloy sheet material can by memorial alloy ingot casting forge, rolling,
Also can be obtained perpendicular to axially cutting by memorial alloy bar.
And, such as:Shown in Fig. 1, Fig. 2 and Fig. 3, described planar bracket ring be closing circle, pentagon, hexagon, seven
Angular, octagonal, nonagon, regular decagon, undecagon, dodecagon.Described planar bracket ring can carry agnail also can without fall
Thorn, and the angular described planar bracket ring of N has N number of exterior angle 19 and N number of interior angle 20, wherein, N is positive integer.In the present embodiment
In, described planar bracket ring can be by carrying out punching press to described memorial alloy sheet material or spark cutting mode obtains.
Accordingly, as shown in figures 4 a and 4b, the shaper of described memory alloy stent ring is according to the shape of support ring
Shape is divided into taper shaper and cylindricality shaper;And the shaper of described memory alloy stent ring can be according to described flat
The head number of face support ring be divided into five shapers, six shapers, seven shapers, eight shapers, nine fixed
Pattern tool, ten shapers, 11 shapers or 12 shapers.
And, the shaper of described memory alloy stent ring can be bored with the support ring height of patterning process as 5-50mm
Degree α is 0-60 degree, and diameter (conical support fourth finger end diameter) is 5-50mm.
In the present embodiment, as shown in figures 4 a and 4b, the shaper of described memory alloy stent ring includes surface and sets
Be equipped with pin die main body 1, along described die main body 1 surface gathering sill 6 slide drag hook 2 push up with described die main body 1
Push rod 3 that the screwed hole engagement in portion connects, lifting disk 4 and use cooperatively with described drag hook 2 located at described die main body 1 top
Cushion block 10.Disk 4 is lifted described in being hooked in one end of described drag hook 2, and described push rod 3 passes through in rotary moving, and drives described support
Act disk 4 rises or declines, thus driving described drag hook 2 to slide up or down along the gathering sill 6 on described die main body 1 surface.
As shown in figure 5 a and 5b, described die main body 1 is divided into taper die main body and cylindrical mold main body, above has N number of
Pin 5, N number of gathering sill 6 and a screwed hole 7.Pin quantity is all identical with the support take capel number shaped with gathering sill quantity,
All pins 5 are uniformly distributed circumferentially in die main body 1 cylinder or the conical surface, and all gathering sills 6 are in die main body 1 cylinder or the conical surface
It is uniformly distributed circumferentially, and pin 5 is along the circumferential direction staggered with gathering sill 6, N number of pin 5 described plane angular with N is propped up
N number of interior angle hook of frame ring.
As shown in fig. 6, described drag hook 2 is slice-shaped part, its thickness is more smaller than gathering sill 6 width of die main body, can
Along gathering sill slidably.Drag hook includes pull bar 8 and is arranged on described pull bar 8 surface wedge-shaped slot 9.Wedge-shaped slot 9 is hooked in be lifted
On lozenges 18 on disk 4;N number of exterior angle hook of the pull bar 8 of the N number of described drag hook 2 described planar bracket ring angular with N.
As shown in fig. 7, described push rod 3 include being slidably matched with the described mesopore lifting disk 4 light bar segment 14, be used for supporting
The described boss 15 lifting disk 4 and the thread segment 16 using cooperatively with the screwed hole 7 on described die main body 1.
As shown in figure 8, described disk 4 of lifting is made up of the mesopore of peripheral ring-type lozenges 18 and middle part, mesopore and push rod 3
On light bar segment 14 be slidably matched.
As shown in figure 9, described cushion block 10 is wedge metal piece, its thickness omits than gathering sill 6 width of described die main body 1
Little, can along gathering sill 6 slidably;Its ramp is used for, when support ring is shaped, support ring agnail is propped up required angle;Thereon
Tie up a groove 11, for binding the pull bar 8 of cushion block and described drag hook 2 by tying up silk.
As as-shown-in figures 10 a and 10b, using described memory alloy stent ring with shaper by described planar bracket ring
Strut as solid, refer to hang on all interior angles 20 of planar bracket ring on the pin 5 of die main body 1, by all exterior angles 19
Hang on the pull bar 8 of drag hook 2 lower end;Drag hook 2 is embedded in the gathering sill 6 of die main body 1, and can glide along along gathering sill
Dynamic, the wedge-shaped slot 9 of drag hook 2 upper end is taken and is placed on the lozenges 18 lifting disk 4;Lift disk 4 to be placed in the light bar segment 14 of push rod 3 simultaneously
Held by the boss 15 on push rod, can along light bar segment relative to slide, rotate;The thread segment 16 of push rod 3 is threaded onto the spiral shell of die main body 1
In pit 7.
Rotate counterclockwise push rod 3, boss 15 drives and lifts disk 4 and rise, because drag hook 2 leans on wedge-shaped slot 9 lodge in lifting on disk,
Therefore lift disk and drive drag hook to rise along gathering sill 6, drag hook pulls planar bracket ring exterior angle 19 along die main body by its upper connecting rod 8
The conical surface or cylinder rise;Because planar bracket ring interior angle hang on immovable on the pin 5 of die main body 1, so that with push rod 3
Rise, planar bracket ring is finally tightened up and fits in becomes three-dimensional bracket ring on the conical surface of die main body 1 or cylinder.If support ring
There is agnail 17, then also need cushion block 8 is embedded in the gathering sill 6 of body die 1, and rely on its inclined-plane by support ring agnail top
Rise, agnail jack-up angle depends on the angle on cushion block inclined-plane.
And, in embodiments of the present invention, as shown in Figure 10 a, Figure 10 b, Figure 11 a and Figure 11 b, processed support ring is permissible
For cylindrical stent ring, alternatively conical stent ring;Both agnail 17 can have been carried, also can be without agnail.
A kind of processing method for shaping of the shaper of memory alloy stent ring according to Fig. 1 specifically includes following step
Suddenly:
With memorial alloy sheet material, planar bracket ring is processed by punching press or spark cutting mode;
Described planar bracket ring set is located at described shaper surface, and cooperates and fix by pin and pull bar
Described planar bracket ring;
Described planar bracket central shoring is opened as solid and is attached at described mould by drag hook tractive and die main body are spacing
Body surfaces become preliminary three-dimensional bracket ring;
By described preliminary three-dimensional bracket ring through Overheating Treatment solid shape, finally give three-dimensional bracket ring.
It should be noted that in heat treatment process, strutting and be fixed on the preliminary three-dimensional bracket on shaper
Heat and be incubated the time of setting under the suitable temperature that ring sets in the range of 400-600 degree, and take the suitable type of cooling,
Thus support ring is shaped into three-dimensional shape.
The shaper of memory alloy stent ring providing compared to prior art, the present invention and processing method for shaping were both kept away
The bonding strength having exempted from the presence of silk material braided support ring is low, the shortcomings of formability is poor, compression diameter is big, simultaneously with memorial alloy
The naked frame of tubing laser engraving and support ring are compared, and reduce material cost and processing cost, improve working (machining) efficiency.
And, with memorial alloy sheet material, memory alloy stent ring is processed by punching press or spark cutting mode, such plus
Work mode is simple, and processing cost is low, high in machining efficiency.Memorial alloy sheet material is readily available compared with tubing, and the cost of material is low.By inciting somebody to action
The planar bracket ring of different size specification is arranged, and stock utilization can be greatly improved, as shown in figure 12.
This embodiment is only the present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in,
All should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.