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Method for quickly producing removalbe partial denture bracket

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Publication number
CN101401746B
CN101401746B CN 200810197517 CN200810197517A CN101401746B CN 101401746 B CN101401746 B CN 101401746B CN 200810197517 CN200810197517 CN 200810197517 CN 200810197517 A CN200810197517 A CN 200810197517A CN 101401746 B CN101401746 B CN 101401746B
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partial
laser
bracket
part
powder
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CN 200810197517
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Chinese (zh)
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CN101401746A (en )
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关凯
曾晓雁
王泽敏
胡乾午
陈光霞
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华中科技大学
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Abstract

The invention discloses a process for quickly manufacturing a removable partial denture bracket by laser, which mainly comprises the following steps: acquiring a three-dimensional part model of a tooth jaw of a patient, adding an indented thin-wall support to the model, layering and dispersing to generate laser processing numerical control instructions, and paving powder on a preheated and insulated metal substrate; and then using a continuous YAG or fiber laser with the beam quality M<2> is smaller than 1.1 to melt metal or alloy powder in a special granularity range layer by layer by using optimized powder paving thickness, falling height of a forming cylinder and a laser processing technique under a focusing light spot of 10 to 100 mu m, and finishing melting, accumulating and processing of the whole part; and finally carrying out tempering heat treatment on the formed part, to obtain the removable partial deture bracket, which combines metallurgy and has a tissue density close to 100 percent. The process can overcome the difficulty of the prior art, and directly manufacture the removable partial denture bracket which has the advantages of high precision and high surface smoothness, no deformation and excellent mechanical property.

Description

一种快速制造可摘局部义齿支架的方法 A rapid method for manufacturing a removable partial denture stent

技术领域 FIELD

[0001] 本发明属于口腔医学修复体的制造领域,具体涉及一种选择性激光熔化技术快速制造可摘局部义齿支架的方法。 [0001] The present invention is in the field of prosthesis manufacturing oral medicine, particularly to a method for selective laser melting technology rapid manufacture of the partial denture framework.

背景技术 Background technique

[0002] 牙列缺损是口腔科的一种常见病和多发病,约占自然人口中的24%〜53%。 [0002] dentistry dentition defect is a common disease, about 24% ~53% of the natural population. 支架式可摘义齿由于价格相对较低,戴用比较方便、舒适,是牙列缺损患者较理想和首选的修复方法之一。 Framework removable denture due to the relatively low price, wear more convenient, comfortable, it is one of dentition defects in patients with ideal and preferred method of repair. 制作义齿支架材料有金属和塑料两类,金属支架在机械性能方面明显优于塑料支架,在口腔内长期使用不会发生变形或断裂,而且金属支架在保证性能的前提下厚度更薄,患者感觉更加舒适。 Making denture plastic materials and two types of metal, metal stent mechanical properties significantly better than plastic stents, long-term use in the oral cavity is not deformed or broken, and a metal bracket on the premise of ensuring the performance thinner, patients feel more comfortable. 因此,可摘局部义齿金属支架的设计与制造方法成为口腔修复医学中的重点研究和开发目标。 Therefore, the design and manufacturing methods removable partial denture prosthodontics metal stents become the focus of research and development goals of medicine.

[0003] 目前制造可摘局部义齿金属支架的技术包括铸造、粉末冶金和超塑性成型等技术。 [0003] It may be partial denture manufacturing techniques include casting metal bracket, superplastic forming and powder metallurgy techniques. 其中,临床医学中应用最多的技术是铸造,虽然该技术的原理简单,容易为操作者所掌握,但它的工序繁琐,同时义齿支架的形状复杂、壁薄,铸造法很难保证金属完全填充,容易产生多种冶金缺陷。 Wherein, in the most widely used clinical technique cast, although the principle of the technique is simple and easy for the operator to grasp, but it tedious process, while the shape of the denture complicated, thin-walled metal casting is difficult to ensure complete filling of , metallurgical defects more likely to occur. 轻金属钛及钛合金由于有良好的力学性能和优异的生物相容性而成为口腔金属修复体的首选。 Because light metal titanium and titanium alloys have good mechanical properties and excellent biocompatibility of metal become the preferred oral prosthesis. 但由于钛及钛合金材料熔点高,极易氧化,不易成型,难以用传统的铸造方法实现。 However, due to the high melting point of titanium and titanium alloy materials, easily oxidized and difficult to shape, it is difficult to achieve with conventional casting methods. 粉末冶金技术成型的精度较高,但是工艺较为复杂,所制备支架的结合强度偏低,并且需要在合金粉末中加入少量的铜等低熔点合金粉末才能改善支架的强度,但这些组元可能带来一些毒副作用,对人体健康不利。 High precision molding powder metallurgy techniques, but the process is more complex, the low bond strength of the prepared stent, and requires a small amount of low melting point alloy powders such as copper alloy powder to improve the strength of the stent, but with a possible component to a number of side effects, adverse to human health. 超塑性成型技术对于材料的局限性很大,目前只能用于Ti-Al-V合金。 Superplastic forming technology for localized large material, is currently limited to Ti-Al-V alloy. 在超塑成型过程中由于模具与被加工材料之间无法完全贴合,同时由于成形过程中热膨胀的影响及气胀成形件厚度分布存在着差异,导致支架的尺寸存在着较大的误差。 Superplastic forming process because the material between the mold and the workpiece can not fully fit, while the influence of thermal expansion during molding and molded inflatable member thickness distribution differences exist, resulting in the size of the stent there is a big error. 综上所述,上述工艺存在着一些共同的缺点:均需要制作模具,整个制造工艺烦琐又不规范、周期长、成本高,并经常出现质量问题。 In summary, the above processes have some common disadvantages: production of molds are required, the entire manufacturing process is cumbersome and not standardized, long period, high cost, and quality problems often arise. 由于精度较差,支架式可摘局部义齿的一次就位率低,密合度及固位稳定性较差,因而会出现佩戴偏差,造成受力不均勻,患者有异样感,甚至出现口腔组织变形、疼痛等症状,使得许多患者对金属支架义齿感到不满意。 Due to poor accuracy, scaffolding may be a partial denture in place of low degree of adhesion and retention stability is poor, and thus there will be a deviation wear, resulting in discontinuity, the patient has a feeling of strangeness, even oral tissue deformation occurs , pain and other symptoms that many patients are dissatisfied with the metal stent prosthesis.

[0004] 针对局部义齿支架不规则的复杂形状和个性化的特点,无模具、高精度、短周期和高度自动化的制作方法成为了新的发展方向,金属激光快速成型技术正是适应这一发展趋势的理想技术。 [0004] The characteristics partial denture irregular and complex shapes personalized, no mold, high precision, short cycle and become highly automated method for manufacturing a new direction, rapid prototyping technology is the metal adapt to this ideal technology trends. 金属激光快速成型技术能实现多种金属零件的直接制造,主要包括两类,一是采用喷嘴送粉的直接激光成型技术(Direct Laser Fabrication,DLF),但由于激光作用的光斑较大,一般在Imm左右,所得金属零件的尺寸精度和表面光洁度都比较差,适合制作精度不高的大型金属毛坯。 Direct metal laser manufacturing rapid prototyping technique can achieve a variety of metal parts, including two types, one is the use of direct laser powder feeding nozzle forming technology (Direct Laser Fabrication, DLF), but the effect of the laser spot is larger, in general about IMM, the resulting metal parts dimensional accuracy and relatively poor surface finish, suitable for making high precision large metal blanks. 二是选择性激光熔化技术(Selective LaserMelting, SLM)是通过滚筒或刮板铺粉,聚焦激光束根据图形作选择性扫描熔化粉末实现金属零件的直接制造,主要适合制作高尺寸精度和表面光洁度的小型金属零件。 Second, selective laser melting technology (Selective LaserMelting, SLM) is a roller or blade by dusting, according to the focused laser beam scan pattern as a selective direct manufacturing molten powder metal part implemented, mainly for the production of high dimensional accuracy and surface finish small metal parts. 义齿支架的形状复杂、壁薄, 由于存在比较大的斜率曲面和薄壁,激光成型过程会受到较大斜率曲面和薄壁的影响而终止;同时由于零件的大部分都是薄壁异形结构,成型过程产生的热应力会导致零件出现不可逆变形使零件报废。 Shape denture complex, thin wall, due to the presence of relatively large slope surface and a thin, laser forming process is affected by the greater slope surface and a thin terminated; and because most of the parts are shaped thin-walled structure, thermal stress generated during molding can cause irreversible deformation part appears that the scrapped parts. 正因为上述技术难点,目前国内外未见金属激光快速成型技术成功制造可摘局部义齿支架的报道。 Because of the above-mentioned technical difficulties, no metal at home and abroad Rapid Prototyping techniques reported successful manufacture of the partial denture framework.

发明内容 SUMMARY

[0005] 本发明的目的在于克服上述不足之处,提供一种快速制造可摘局部义齿支架的工艺方法,利用该方法可以直接制造出高精度和高表面光洁度、无变形且具有优良机械性能的可摘局部义齿支架。 [0005] The object of the present invention is to overcome the above disadvantages, to provide a rapid process for manufacturing a removable partial denture, with which the method can be produced directly with high precision and surface finish, no deformation and having excellent mechanical properties removable partial denture framework.

[0006] 本发明提供的快速制造可摘局部义齿支架的工艺方法,采用激光功率为100〜 200W,光束质量M2 < 1. 1的连续YAG或光纤激光器,聚焦光斑尺寸为10〜100 μ m ;所用的金属或合金粉末包括不锈钢、钴_铬合金、纯钛或钛合金粉末,粉末的粒度小于45 μ m,但粉末的最大粒径大于等于IOym ;所用的金属或合金粉末为不锈钢或钴-铬合金材料时,金属基板的材料为不锈钢,所用的金属或合金粉末为纯钛或钛合金材料时,金属基板的材料为钛板;其具体处理步骤包括: [0006] The present invention provides a process for rapid manufacturing of removable partial denture, laser power 100~ 200W, beam quality M2 <YAG or fiber laser continuous 1.1, the focusing spot size of 10~100 μ m; as used metal or alloy powder comprises stainless steel, cobalt _ chromium alloy, titanium or titanium alloy powder, powder of particle size less than 45 μ m, but the maximum particle size of powder is greater than or equal IOym; metal or alloy powder used is stainless steel or cobalt - chromium alloy, a stainless steel material of the metal substrate, the metal or alloy powder used is pure titanium or a titanium alloy material, a material of the metal substrate is titanium; specific processing step comprises:

[0007] (1)获取患者口腔石膏咬模,得到患者牙颂模型的三维数据,再利用三维数据生成CAD零件模型;采用Magics软件对零件斜率过大位置或薄壁位置添加锯齿状薄壁支撑后保存为STL文件,将STL文件输入SLM快速成型设备由切片软件进行分层离散,生成激光加工数控代码; [0007] (1) obtaining the patient's mouth bite plaster mold, to obtain three-dimensional data model of the patients teeth song, and then three-dimensional CAD data generating part model; Magics software components using the slope is too large or thin-walled position of the supporting position of the thin-walled serrated added saved in the STL file, the STL file input SLM rapid prototyping apparatus stratified by the discrete slices software generates laser machining NC code;

[0008] (2)将厚度为25〜40mm的金属基板预热到80〜100°C,并在整个激光成型过程中进行保温; [0008] (2) the thickness of the metal substrate is preheated to 25~40mm 80~100 ° C, and incubated in the entire laser molding process;

[0009] (3)在金属基板表面预置一层20〜60 μ m厚度的粉末层,激光器根据激光加工数控代码设定的路径对该粉末层进行扫描,使金属或合金粉末在金属基板上形成平整的熔化层;该层处理时,激光成型工艺参数为:激光功率150〜200W,激光聚焦光斑10〜100 μ m, 搭接量0. 01〜0. 03mm,扫描速度50〜250mm/s ; [0009] (3) one preset 20~60 μ m thickness of the powder layer on the surface of the metal substrate, the laser scans the powder layer according to the path of the laser machining NC code set, so that metal or alloy powder on a metal substrate forming a flat molten layer; when the layer processing laser forming process parameters were: laser power 150~200W, the laser beam spot 10~100 μ m, the amount of overlap 0. 01~0 03mm, the scanning speed 50~250mm / s. ;

[0010] (4)将金属基板下降10〜30 μ m,再在熔化层上重新预置一层20〜60 μ m厚度的粉末层; [0010] (4) The metal substrate fall 10~30 μ m, and then re-initializing powder layer of 20~60 μ m thickness on the molten layer;

[0011] (5)利用激光器按设定的路径对重新预置的金属或合金粉末层进行扫描成型,形成新的熔化层;激光成型工艺参数为:激光功率100〜200W,激光聚焦光斑10〜100 μ m,搭接量0. 01〜0. 05mm,扫描速度50〜1000mm/s ; [0011] (5) by using a laser to reinitialize path setting metal or alloy powder layer forming is scanned, to form a new molten layer; laser forming process parameters: laser power 100~200W, the laser beam spot 10~ . 100 μ m, the amount of overlap 0. 01~0 05mm, the scanning speed 50~1000mm / s;

[0012] (6)重复上述步骤(4)和(5),直至完成整个零件的熔化堆积加工; [0012] (6) repeating the above steps (4) and (5), until the completion of melting the entire part of the accumulation processing;

[0013] (7)将金属基板和零件放入温度为500〜800°C的惰性气体保护或真空热处理炉中,保温1〜2小时后随炉冷却; [0013] (7) The substrate and the metal parts into a temperature inert gas or a vacuum heat treatment furnace of 500~800 ° C, incubated ~ 2 hours after cooling with the furnace;

[0014] (8)将零件从金属基板上切割下来,去掉薄壁支撑,并对零件表面进行喷砂处理, 得到所需的义齿支架。 [0014] (8) The part cut off from the metal substrate, removing the thin-walled support part and the surface sandblasted to obtain the desired denture.

[0015] 本发明具有以下技术效果: [0015] The present invention provides the following effects:

[0016] (1)本发明是自动化、无模具最终成型,制造过程不需要铸造模型或锻造模具,不受成型材料的影响,能显著降低制造成本,缩短制造周期。 [0016] (1) The present invention is an automated, non-final forming mold, the manufacturing process does not require forging or die casting model, is not affected by the molding material, can significantly reduce manufacturing costs and shorten the manufacturing cycle.

[0017] (2)采用对义齿支架斜率过大位置或薄壁位置添加辅助支撑的方法,解决了由于斜率曲面太大或壁薄而导致激光成型过程终止的难题。 [0017] (2) Method of denture position slope is too large or thin-walled position of the auxiliary support is added to solve the problem due to the slope or wall surface is too thin, resulting in laser forming process is terminated.

[0018] (3)对基板进行预热处理并在整个成型期间保温,减少了激光成型过程中工件内应力的形成,从而减小义齿支架因为热应力导致的变形量,保证义齿支架的尺寸精度。 [0018] (3) substrate preheated and incubated during molding by reducing the formation within the workpiece during the laser forming stress, thereby reducing the amount of deformation due to thermal stress because the denture to ensure the dimensional accuracy of the denture . 同时热的粉末也增加了对激光的吸收率。 While the powder also increases the heat absorption of the laser light.

[0019] (4)采用单独的激光加工工艺参数处理第一层粉末,使第一层粉末克服高的热传导率被完全熔化,获得与基板牢固结合、平整的金属熔化层,保证后续铺粉和激光成型的顺利进行。 [0019] (4) using a separate laser processing parameters processes the first powder layer, the powder of the first layer against the high thermal conductivity is completely melted, the substrate obtained by combining a solid, smooth layer of molten metal, powder spreading and ensure the follow-up smooth laser forming.

[0020] (5)选用特定粒度范围的金属或合金粉末,优化的铺粉厚度、成型缸下降高度和激光加工工艺,结合高光束质量的固体激光器进行激光成型来实现义齿支架的高精度和表面 [0020] (5) selection of a specific particle size range of metal or alloy powder, powder spreading thickness optimized, drop height and cylinder forming laser machining process, a solid laser combined high beam quality laser and high precision molding surface of the denture

光洁度ο Ο finish

[0021] (6)对义齿支架和基板整体进行回火热处理,能基本消除义齿支架内部残留的内应力,进一步提高零件的机械性能。 [0021] (6) on the whole substrate denture and heat treatment, can substantially eliminate the internal residual stress of the denture, to further improve the mechanical properties of the parts.

附图说明 BRIEF DESCRIPTION

[0022] 图1是一种可摘局部义齿支架的三维实体零件模型; [0022] FIG. 1 is a removable three-dimensional solid model of the part of the partial denture;

[0023] 图2是图1添加锯齿状薄壁支撑后的三维实体零件模型。 [0023] FIG. 2 is a thin-walled serrated support after adding three-dimensional solid model of the part of FIG. 1.

具体实施方式 detailed description

[0024] 下面举例对本发明做进一步详细的说明。 [0024] The following examples further illustrate the present invention in detail. 图1中的三维实体零件是根据一名口腔患者的牙列缺损所设计的可摘局部义齿支架,具有个案的特点。 Three-dimensional solid part of FIG. 1 is a defect of a patient's oral cavity dentition designed removable partial denture, having the characteristics of cases.

[0025] 图2是利用Magics软件对图1所示图形添加锯齿状薄壁支撑后的零件图示。 [0025] FIG. 2 is illustrated using Magics software add-on parts for supporting the thin-walled serrated pattern shown in FIG.

[0026] 这里将图1和图2列出,是为了结合实施例更好说明本发明的实现过程。 [0026] Here FIG. 1 and FIG. 2 are listed, for connection with the embodiment it is better illustrate the implementation of the present invention.

[0027] 实施例1 :选择性激光熔化快速制造不锈钢可摘局部义齿支架 [0027] Example 1: Selective Laser Melting Rapid Manufacturing stainless removable partial denture framework

[0028] 参照图1和图2的图形。 Graphics [0028] Referring to FIGS. 1 and 2. 将图2所示添加了锯齿状薄壁支撑后的三维零件模型保存为STL格式文件,采用分层切片软件进行分层离散,生成激光加工数控指令。 Saving the three-dimensional model of the part shown in FIG. 2 is added to support the thin-walled serrated STL format, using a discrete stratification slicing software, numerical control commands generated laser processing. 选用连续YAG激光器,制作义齿支架的材料为粒度<45 μ m的不锈钢合金粉末,以25mm厚的不锈钢板作为基板,铺粉厚度60 μ m,铺粉速度3. Om/min,成型缸每次下降高度为20 μ m。 Selection continuous YAG laser, denture material of a particle size <45 μ m stainless steel alloy powder to 25mm thick stainless steel plate as the substrate, the thickness of the spread powder 60 μ m, powder spreading rate 3. Om / min, forming each cylinder drop height of 20 μ m.

[0029] 第一层的激光加工工艺参数为:激光功率150W,扫描速度50mm/s,搭接量0. Olmm0 后续层的激光加工工艺参数为:激光功率130W,扫描速度250mm/s,搭接量0. 04mm。 Laser Processing Parameters [0029] first layer: laser power of 150W, the scanning speed of 50mm / s, the amount of overlap of the laser machining parameters 0. Olmm0 subsequent layer: laser power of 130W, the scanning speed of 250mm / s, overlapping the amount of 0. 04mm.

[0030] 激光成型完毕后,将基板和工件一起放入温度为500°C的氩气保护热处理炉中,保温2小时,然后随炉冷却。 [0030] After the laser forming is completed, the workpiece and the substrate together into the argon heat treatment furnace temperature of 500 ° C in the protection, incubated for 2 hours, then cooling with the furnace. 冷却后用线切割的方法从基板上切下零件,去掉薄壁支撑。 After cooling method of cutting the substrate from the cut part, thin-walled support removed. 成型的可摘局部义齿支架密度接近100%,机械性能优良,尺寸精度达到士0. 1mm,表面粗糙度Ra 为8〜10 μ m,对成型的零件进行喷砂等后续表面加工,表面粗糙度Ra可达4〜5 μ m。 Shaped partial denture framework density may be close to 100%, excellent mechanical properties, dimensional accuracy disabilities 0. 1mm, the surface roughness Ra of 8~10 μ m, on the surface of molded parts for subsequent processing such as sandblasting, surface roughness Ra up 4~5 μ m.

[0031] 实施例2 :选择性激光熔化快速制造钴一铬合金可摘局部义齿支架 [0031] Example 2: Selective Laser Melting rapid manufacturing a cobalt chromium alloy removable partial denture framework

[0032] 参照图1和图2的图形。 Graphics [0032] Referring to FIGS. 1 and 2. 将图2所示添加了锯齿状薄壁支撑后的三维零件模型保存为STL格式文件,采用分层切片软件进行分层离散,生成激光加工数控指令。 Saving the three-dimensional model of the part shown in FIG. 2 is added to support the thin-walled serrated STL format, using a discrete stratification slicing software, numerical control commands generated laser processing. 选用连续半导体泵浦固体激光器,制作义齿支架的材料为粒度<40 μ m的钴一铬合金粉末,以30mm厚的不锈钢板作为基板,铺粉厚度40 μ m,铺粉速度3. Om/min,成型缸每次下降高度为20 μ m,制作过程采用高纯氩气保护。 Continuous selection DPSSL, denture material of a particle size <40 μ m of a cobalt-chromium alloy powder, 30mm thick stainless steel plate as the substrate, the thickness of the spread powder 40 μ m, powder spreading rate 3. Om / min molding each drop height of the cylinder 20 μ m, the production process using high purity argon gas protection.

[0033] 第一层的激光加工工艺参数为:激光功率150W,扫描速度150mm/s,搭接量0. 02mm。 Laser Processing Parameters [0033] first layer: laser power of 150W, the scanning speed / s, the amount of overlap 150mm 0. 02mm. 后续层的激光加工工艺参数为:激光功率150W,扫描速度500mm/s,搭接量0. 03mm。 Laser Processing Parameters for the subsequent layer: laser power of 150W, the scanning speed / s, the amount of overlap 500mm 0. 03mm.

5[0034] 激光成型完毕后,将基板和工件一起放入温度为650°C的氩气保护热处理炉中,保温1小时,然后随炉冷却。 5 [0034] After the laser forming is completed, the substrate and the workpiece placed into an argon gas with a temperature of 650 ° C heat treatment furnace in protection, for 1 hour, then cooling with the furnace. 冷却后用线切割的方法从基板上切下零件,去掉薄壁支撑。 After cooling method of cutting the substrate from the cut part, thin-walled support removed. 成型的可摘局部义齿支架密度接近100%,机械性能优良,尺寸精度达到士0. 1mm,表面粗糙度Ra 为8〜10 μ m。 Shaped partial denture framework density may be close to 100%, excellent mechanical properties, dimensional accuracy disabilities 0. 1mm, the surface roughness Ra of 8~10 μ m. 对成型的零件进行喷砂等后续表面加工,表面粗糙度Ra可达4〜5 μ m。 Molded parts for subsequent processing and other surface blasting, the surface roughness Ra of up to 4~5 μ m. [0035] 实施例3 :选择性激光熔化快速制造钛合金可摘局部义齿支架 [0035] Example 3: Selective Laser Melting Rapid Manufacturing titanium removable partial denture framework

[0036] 参照图1和图2的图形。 Graphics [0036] Referring to FIGS. 1 and 2. 将图2所示添加了锯齿状薄壁支撑后的三维零件模型保存为STL格式文件,采用分层切片软件进行分层离散,生成激光加工数控指令。 Saving the three-dimensional model of the part shown in FIG. 2 is added to support the thin-walled serrated STL format, using a discrete stratification slicing software, numerical control commands generated laser processing. 选用连续Yb 光纤激光器,制作义齿支架的材料为粒度<20 μ m的Ti-6A1-4V合金粉末,以40mm厚的钛板作为基板,铺粉厚度20 μ m,铺粉速度3. Om/min,成型缸每次下降高度为20 μ m,制作过程采用高纯氩气保护。 Continuous selection Yb fiber laser, denture material of a particle size <Ti-6A1-4V alloy powder 20 μ m to 40mm thick titanium plate as the substrate, a thickness of 20 μ m dusting, powder spreading rate 3. Om / min molding each drop height of the cylinder 20 μ m, the production process using high purity argon gas protection.

[0037] 第一层的激光加工工艺参数为:激光功率160W,扫描速度150mm/s,搭接量0. 03mm。 Laser Processing Parameters [0037] first layer: laser power is 160W, the scanning speed / s, the amount of overlap 150mm 0. 03mm. 后续层的激光加工工艺参数为:激光功率140W,扫描速度800mm/s,搭接量0. 01mm。 Laser Processing Parameters for the subsequent layer: laser power 140W, scanning speed / s, the amount of overlap 800mm 0. 01mm.

[0038] 激光成型完毕后,将基板和工件一起放入温度为800°C的真空热处理炉中,保温1 小时,然后随炉冷却。 [0038] After the laser forming is completed, the substrate and the workpiece placed into a vacuum heat treatment furnace together with the temperature to 800 ° C and incubated for 1 hour, then cooling with the furnace. 冷却后用线切割的方法从基板上切下零件,去掉薄壁支撑。 After cooling method of cutting the substrate from the cut part, thin-walled support removed. 成型的可摘局部义齿支架密度接近100 %,机械性能优良,尺寸精度达到士0. 2mm,表面粗糙度Ra为8〜10 μ m,对成型的零件进行喷砂等后续表面加工,表面粗糙度Ra可达4〜5 μ m。 Shaped partial denture framework density may be close to 100%, excellent mechanical properties, dimensional accuracy disabilities 0. 2mm, the surface roughness Ra of 8~10 μ m, on the surface of molded parts for subsequent processing such as sandblasting, surface roughness Ra up 4~5 μ m.

[0039] 利用本发明所制造零件的表面粗糙度Ra为8〜10 μ m,经过后续喷砂处理后表面粗糙度Ra可小于5 μ m。 The surface roughness Ra [0039] With the present invention for manufacturing parts 8~10 μ m, the subsequent blast treatment after a surface roughness Ra may be less than 5 μ m. 本发明的具体实施方式并不局限于上述举例中的一种,通过选择不同种类和粒径的金属或合金粉末,采用不同的激光加工工艺参数,本发明可以采用多种方式加以具体实现,并能达到很好的发明效果。 DETAILED DESCRIPTION The present invention is not limited to one in the above example, by selecting different kinds of metal or alloy powder and the particle size of a laser using different processing parameters, the present invention may be embodied in various ways, and invention can achieve very good results.

Claims (2)

  1. 一种快速制造可摘局部义齿支架的工艺方法,采用激光功率为100~200W,光束质量M2<1.1的连续YAG或光纤激光器,聚焦光斑尺寸为10~100μm;所用的金属或合金粉末包括不锈钢、钴-铬合金、纯钛或钛合金粉末,粉末的粒度小于45μm,但粉末的最大粒径大于等于10μm;所用的金属或合金粉末为不锈钢或钴-铬合金材料时,金属基板的材料为不锈钢,所用的金属或合金粉末为纯钛或钛合金材料时,金属基板的材料为钛板;其具体处理步骤包括:(1)获取患者口腔石膏咬模,得到患者牙颌模型的三维数据,再利用三维数据生成CAD零件模型;采用Magics软件对零件斜率过大位置或薄壁位置添加锯齿状薄壁支撑后保存为STL文件,将STL文件输入SLM快速成型设备由切片软件进行分层离散,生成激光加工数控代码;(2)将厚度为25~40mm的金属基板预热到80~100℃,并在整个激光 Process A rapid method for manufacturing a removable partial denture, using a laser power of 100 ~ 200W, beam quality continuous YAG or fiber laser M2 <1.1, the focusing spot size of 10 ~ 100μm; as used metal or alloy powder comprises stainless steel, cobalt - chromium alloys, titanium or titanium alloy powder, powder of particle size less than of 45 m, but the maximum particle size of powder is equal to greater than 10μm; as used metal or alloy powder of stainless steel or cobalt - chromium alloy, stainless steel material of the metal substrate , the used metal or alloy powder is pure titanium or a titanium alloy material, a material of the metal substrate is titanium; specific process steps comprising: (1) obtaining the patient's mouth bite plaster mold, to obtain three-dimensional data model of the dental patient, and then using three-dimensional CAD data generating part model; Magics software components using the slope is too large or thin-walled position adding the position is saved as a thin-walled serrated support STL file, the STL file input SLM rapid prototyping apparatus stratified by the discrete slices software, generating laser machining NC code; (2) the preheated metal substrate having a thickness of 25 ~ 40mm to 80 ~ 100 ℃, and the entire laser 成型过程中进行保温;(3)在金属基板表面预置一层20~60μm厚度的粉末层,激光器根据激光加工数控代码设定的路径对该粉末层进行扫描,使金属或合金粉末在金属基板上形成平整的熔化层;该层处理时,激光成型工艺参数为:激光功率150~200W,激光聚焦光斑10~100μm,搭接量0.01~0.03mm,扫描速度50~250mm/s;(4)将金属基板下降10~30μm,再在熔化层上重新预置一层20~60μm厚度的粉末层;(5)利用激光器按设定的路径对重新预置的金属或合金粉末层进行扫描成型,形成新的熔化层;激光成型工艺参数为:激光功率100~200W,激光聚焦光斑10~100μm,搭接量0.01~0.05mm,扫描速度50~1000mm/s;(6)重复上述步骤(4)和(5),直至完成整个零件的熔化堆积加工;(7)将金属基板和零件放入温度为500~800℃的惰性气体保护或真空热处理炉中,保温1~2小时后随炉冷却;(8)将 Insulate molding process; (3) pre-layer of 20 60μm thickness of the powder layer - the surface of the metal substrate, the laser scans the powder layer according to the path of the laser machining NC code set, so that the metal or alloy powder metal substrate molten layer is formed on the flat; when the layer processing laser forming process parameters were: laser power of 150 ~ 200W, the laser beam spot 10 ~ 100μm, the amount of overlap 0.03mm, the scanning speed of 0.01 ~ 50 ~ 250mm / s; (4) the metal substrate drop 10 ~ 30μm, then reinitialize powder layer - a layer of 20 60μm thickness on melted layer; (5) set path by re-preset metal or alloy powder molded layer is scanned with a laser, to form a new molten layer; laser forming process parameters were: laser power of 100 ~ 200W, the laser beam spot 10 ~ 100μm, the amount of overlap 0.05mm, the scanning speed of 0.01 ~ 50 ~ 1000mm / s; (6) repeating the above steps (4) and (5) above to complete the bulk melt processing part; (7) the substrate and the metal parts into a temperature inert gas or a vacuum heat treatment furnace of 500 ~ 800 ℃, incubated for 1 to 2 hours after cooling with the furnace; (8) the 件从金属基板上切割下来,去掉薄壁支撑,并对零件表面进行喷砂处理,得到所需的义齿支架。 Cutting off from the metal substrate, removing the thin-walled support part and the surface sandblasted to obtain the desired denture.
  2. 2.根据权利要求1所述的工艺方法,其特征在于:步骤(4)中,将金属基板下降20 μ m。 2. A process for according to claim 1, wherein: step (4), the decline in the metal substrate 20 μ m.
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CN103240414B (en) * 2013-05-27 2015-03-18 黑龙江科技大学 Parameter selecting method for manufacturing metal parts by selective laser melting technology and substrate samples
CN104084582A (en) * 2014-07-23 2014-10-08 上海上远齿科技术有限公司 False tooth support prepared from metal powder through laser casting and preparation method of false tooth support
CN104117672B (en) * 2014-07-31 2017-01-18 华中科技大学 A process for preparing / amorphous alloy and a composite material forming
CN105269824A (en) * 2015-10-27 2016-01-27 上海航天精密机械研究所 Rapid formation method of X-ray detecting device for blade of aviation engine
CN105537587A (en) * 2015-12-18 2016-05-04 绍兴文理学院 Method for removing cracks during selective laser melting of nickel-based alloy
CN106037966B (en) * 2016-05-12 2018-01-02 中国人民解放军第四军医大学 An oral prosthesis cad / method for automated processing of metal 3d
CN105852998A (en) * 2016-05-12 2016-08-17 中国人民解放军第四军医大学 Automatic CAD/CAM/3D processing method of dental prostheses
CN106264762A (en) * 2016-07-20 2017-01-04 中国人民解放军第四军医大学 Dental prosthesis CAD/CAM/SLM-3D printing compound method

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