CN104905894A - Titanium alloy skull repair prosthesis preparation method based on metal powder laser sintering 3D molding technology - Google Patents
Titanium alloy skull repair prosthesis preparation method based on metal powder laser sintering 3D molding technology Download PDFInfo
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- CN104905894A CN104905894A CN201510394618.5A CN201510394618A CN104905894A CN 104905894 A CN104905894 A CN 104905894A CN 201510394618 A CN201510394618 A CN 201510394618A CN 104905894 A CN104905894 A CN 104905894A
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Abstract
The invention discloses a titanium alloy skull repair prosthesis preparation method based on a metal powder laser sintering 3D molding technology. The titanium alloy skull repair prosthesis preparation method is characterized by comprising the following steps of: scanning a skull repair patient by a radiological technology, and reconstructing a model for a skull missing part by a reverse technology; performing 3D modeling for the skull missing part; pre-processing the skull repair prosthesis model; introducing the processed skull repair prosthesis model into a 3D molding device, scanning layers by layers until molding is completed; taking the completely processed skull repair prosthesis down from a processing platform together with a support by wire-electrode cutting; cutting the support down from the prosthesis by wire-electrode cutting, polishing the convex surface and edge of the prosthesis by a sand-blasting machine, and finally manually polishing until the surface of the prosthesis reaches technical requirements. The titanium alloy skull repair prosthesis preparation method adopts the bottom up type additive processing method, can achieve the quick molding of the skull repair prosthesis, and is not prone to being limited by shapes and thickness of the skull repair prostheses.
Description
Technical field
The present invention relates to a kind of preparation method of skull prosthesis, specifically a kind of titanium alloy skull prosthesis preparation method based on laser sintering metallic powder 3D forming technique.
Background technology
At present, skull reparation patient is divided into congenital and posteriority two kinds.Congenital patient is because grow with abnormal skull when being born, and causes the severe deformities of skull generation afterwards, must carry out the normal growth that surgical operation guides skull.Posteriority skull is repaired patient and is referred to the defect of skull formed the day after tomorrow, and this kind of patient's proportion is very large, and quantity is striven many year by year.As everyone knows, war, traffic accident, weight strike etc., all can cause Skull defect; On the other hand, the sickness rate of the cerebral tumor is also in rising trend, and incident after cerebral operations is exactly skull repairing.Therefore, with regard in the application of this achievement in research, there is huge potential user, the prospect of market application is extensive.
In manufacturing process, domesticly mainly contain four kinds of methods: shaped by hand, lost-wax casting, mould compacting and multiple spot forming technique.Shaped by hand method requires higher to the manual levelling of clinician, and titanium alloy is easy-formation not, moulding difficulty, and labor intensity is large, adds operating time.Easily produce warpage and fold time moulding, cause prosthesis and defect anastomose property poor.These shortcomings are all the shortcomings that manual plasticity method is difficult to overcome, and have had a strong impact on repairing effect.
Casting and mould are compressed on prosthesis and increase qualitatively, but the manufacturing cycle is long, cost is high, flexibility is poor, is difficult to ensure that disposable surgical completes debridement and repairing with current preparation means.And impression, wrinkling, resilience and edge warping are distinctive forming defects in multiple spot molding, impression and the wrinkling good looking appearance affecting skull repairing body, resilience can make dummy size and defect of skull spot size misfit, and causes dummy to subside or fixingly to loosen.Edge warping can make dummy and defect of skull position can not good fit, affects repairing quality.
Skull recovery technique, is not only related to vast Skull defect patient health and attractive in appearance, and has a strong impact on patient's quality of life from now on, therefore have great importance to the research of skull repairing body technology of preparing.
Summary of the invention
According to the moulding difficulty occurred in the skull prosthese preparation of above-mentioned proposition, easily produce the technical problems such as warpage, fold, impression time moulding, and a kind of titanium alloy skull prosthesis preparation method based on laser sintering metallic powder 3D forming technique is provided.The present invention mainly utilizes 3D forming technique to realize the rapid shaping of different in nature skull prosthesis, thus the defect to thin-walled prosthese processing difficulties in overcoming processing method in the past, reach saving material, improve the effect of the surface accuracy of prosthesis.
The technological means that the present invention adopts is as follows:
Based on a titanium alloy skull prosthesis preparation method for laser sintering metallic powder 3D forming technique, it is characterized in that comprising the steps:
S1, Imaging Technology is utilized to scan skull reparation patient, by the model of reverse reconstruct Skull defect part;
S2, three-dimensional modeling is carried out to the model of above-mentioned reconstruct Skull defect part;
S3, pretreatment is carried out to the skull prosthesis model that above-mentioned three-dimensional modeling generates:
Adopting skull prosthesis convex surface for supporting interpolation face, adopting most advanced and sophisticated formula linear support for supporting described skull prosthesis convex surface, described skull prosthesis convex surface is tilted to predetermined angle and prepare to carry out 3D molding;
S4, will process after skull prosthesis model import in 3D former, material selection titanium alloy, adopts laser powder sintering 3D forming technique, scans layer by layer, until molding completes;
S5, the skull prosthesis machined and processing platform to be taken out in the lump, use Linear cut to be taken off from processing platform together with support by skull prosthesis;
S6, utilize Linear cut sticky and on skull prosthesis support to be cut, with sandblasting machine polishing skull prosthesis convex surface and edge thereof, last manual grinding, until skull prosthesis surface reaches technical requirement.
It should be noted that the content that the above-mentioned skull prosthesis model generated three-dimensional modeling carries out pretreatment essence and comprises choosing of profile angle and add support two aspect.
Choosing of profile angle: skull prosthesis is a kind of thin wall component, is adding man-hour, keeps flat and erects completely the molding effect of two kinds of angles and all can occur the defects such as sagging, distortion, even can cause the failure of molding.Skull prosthesis concave surface directly contacts with human brain, and required precision is higher, therefore the present invention adopts the molding of skull prosthesis convex surface inclination certain angle;
Add support: add support object be prevent by profiled member in forming process because material cured causes thin-walled prosthese to be out of shape not in time, therefore most advanced and sophisticated formula linear support is adopted, both save material to be easy to reject, greatly reduce again the impact supported skull prosthesis surface accuracy.
Further, each described support is arranged on the minimum point place of the layer section of described skull prosthesis convex surface, refer at molding pretreatment stage, by the factor such as analysis and shaping characteristic to skull prosthesis, the minimum point place of every section layer by layer of skull prosthesis is arranged support, the generation occurring unsettled phenomenon in forming process can be prevented like this.
Further, described three-dimensional modeling adopts Pro/e software.
Further, the predetermined angle of described skull prosthesis convex surface inclination is at 35 °-55 °.
Compared with prior art, the present invention has following remarkable advantage:
The present invention is one type increasing from bottom to top material processing method, can realize the rapid shaping of skull prosthesis, and not be subject to the restriction of skull prosthesis shape, thin degree etc.Main innovate point is: the rapid shaping utilizing 3D forming technique to realize a different in nature skull prosthesis, overcomes the defect to thin-walled prosthese processing difficulties in processing method in the past; For high specific of skull prosthesis surface finish requirements, propose to adopt distinctive most advanced and sophisticated formula linear support form, both saved the surface accuracy that material also ensure that prosthesis; By the contrast of different process angular way, finally determine that best predetermined angle that skull prosthesis convex surface tilts is at 35 °-55 °.Method of the present invention also can the titanium alloy skull prosthesis of simultaneously molding ten or more different sizes, and the clinical operation for Skull defect person saves the valuable time.
The present invention extensively can promote in skull prosthesis technical field for the foregoing reasons.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is that skull prosthesis of the present invention supports schematic diagram.
Fig. 2 is the rearview of Fig. 1.
Fig. 3 is the layout schematic diagram of the present invention when adopting multi up moIdiag.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is course of processing schematic diagram of the present invention.
In figure: 1, skull prosthesis 2, skull prosthesis concave surface 3, skull prosthesis convex surface 4, support 5, processing platform.
Detailed description of the invention
As shown in Fig. 1, Fig. 2, a kind of titanium alloy skull prosthesis preparation method based on laser sintering metallic powder 3D forming technique, comprises the steps:
S1, Imaging Technology is utilized to scan skull reparation patient, by the model of reverse reconstruct Skull defect part; Imaging Technology comprises the imaging techniques such as CT, DR.
S2, the model of Pro/e software to above-mentioned reconstruct Skull defect part is utilized to carry out three-dimensional modeling;
S3, pretreatment is carried out to skull prosthesis 1 model that above-mentioned three-dimensional modeling generates:
Choosing of profile angle: skull prosthesis 1 is a kind of thin wall component, is adding man-hour, keeps flat and erects completely the molding effect of two kinds of angles and all can occur the defects such as sagging, distortion, even can cause the failure of molding.Because skull prosthesis concave surface 2 directly contacts with human brain, required precision is higher, the present invention adopts skull prosthesis convex surface 3 to add face for support 4, described skull prosthesis convex surface 3 to be tilted predetermined angle molding, the predetermined angle that described skull prosthesis convex surface 3 tilts, at 35 °-55 °, is preferably 45 °;
Add and support: add the object of support 4 be prevent by profiled member in forming process because material cured causes thin-walled prosthese to be out of shape not in time, the present invention adopts most advanced and sophisticated formula linear support 4, both save material to be easy to reject, greatly reduce the impact of support 4 on skull prosthesis 1 surface accuracy; Each described support 4 is arranged on the minimum point place of the layer section of described skull prosthesis convex surface 3, namely by factors such as the analysis of skull prosthesis 1 and shaping characteristics, the minimum point place of every section layer by layer of skull prosthesis 1 is arranged support, the generation occurring unsettled phenomenon in forming process can be prevented like this.
S4, will process after skull prosthesis model import in 3D former, material selection titanium alloy, adopts laser powder sintering 3D forming technique (usually adopting 3D printing technique), scans layer by layer, until molding completes (as shown in Figure 5);
S5, the skull prosthesis 1 machined and processing platform 5 to be taken out in the lump, use Linear cut to be taken off from processing platform together with support 4 by skull prosthesis 1;
S6, utilize Linear cut sticky and on skull prosthesis 1 support 4 to be cut, with sandblasting machine polishing skull prosthesis convex surface 3 and edge thereof, last manual grinding, until skull prosthesis 1 surface reaches technical requirement.
As shown in Figure 3, Figure 4, method of the present invention also can the titanium alloy skull prosthesis of simultaneously molding ten or more different sizes, and the clinical operation for Skull defect person saves the valuable time.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (4)
1., based on a titanium alloy skull prosthesis preparation method for laser sintering metallic powder 3D forming technique, it is characterized in that comprising the steps:
S1, Imaging Technology is utilized to scan skull reparation patient, by the model of reverse reconstruct Skull defect part;
S2, three-dimensional modeling is carried out to the model of above-mentioned reconstruct Skull defect part;
S3, pretreatment is carried out to the skull prosthesis model that above-mentioned three-dimensional modeling generates:
Adopting skull prosthesis convex surface for supporting interpolation face, adopting most advanced and sophisticated formula linear support for supporting described skull prosthesis convex surface, described skull prosthesis convex surface is tilted to predetermined angle and prepare to carry out 3D molding;
S4, will process after skull prosthesis model import in 3D former, material selection titanium alloy, adopts laser powder sintering 3D forming technique, scans layer by layer, until molding completes;
S5, the skull prosthesis machined and processing platform to be taken out in the lump, use Linear cut to be taken off from processing platform together with support by skull prosthesis;
S6, utilize Linear cut sticky and on skull prosthesis support to be cut, with sandblasting machine polishing skull prosthesis convex surface and edge thereof, last manual grinding, until skull prosthesis surface reaches technical requirement.
2. the titanium alloy skull prosthesis preparation method based on laser sintering metallic powder 3D forming technique according to claim 1, is characterized in that: each described support is arranged on the minimum point place of the layer section of described skull prosthesis convex surface.
3. the titanium alloy skull prosthesis preparation method based on laser sintering metallic powder 3D forming technique according to claim 1, is characterized in that: described three-dimensional modeling adopts Pro/e software.
4. the titanium alloy skull prosthesis preparation method based on laser sintering metallic powder 3D forming technique according to claim 1, is characterized in that: the predetermined angle that described skull prosthesis convex surface tilts is at 35 °-55 °.
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| CN105499565A (en) * | 2015-12-02 | 2016-04-20 | 西安交通大学 | Device for quickly repairing damaged metal parts in field environment |
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| CN109044567A (en) * | 2018-08-22 | 2018-12-21 | 广州华钛三维材料制造有限公司 | A kind of artifical bone and preparation method thereof |
| CN114368174A (en) * | 2021-11-24 | 2022-04-19 | 中国南方航空股份有限公司 | Hyperbolic surface shape recovery method for V2500 engine translation door tip repair |
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| CN114368174A (en) * | 2021-11-24 | 2022-04-19 | 中国南方航空股份有限公司 | Hyperbolic surface shape recovery method for V2500 engine translation door tip repair |
| CN114368174B (en) * | 2021-11-24 | 2023-12-26 | 中国南方航空股份有限公司 | Hyperboloid shape recovery method for repairing tip of translation door of V2500 engine |
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