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Publication numberCN101401746 B
Publication typeGrant
Application numberCN 200810197517
Publication date10 Nov 2010
Filing date30 Oct 2008
Priority date30 Oct 2008
Also published asCN101401746A
Publication number200810197517.9, CN 101401746 B, CN 101401746B, CN 200810197517, CN-B-101401746, CN101401746 B, CN101401746B, CN200810197517, CN200810197517.9
Inventors关凯, 曾晓雁, 王泽敏, 胡乾午, 陈光霞
Applicant华中科技大学
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Method for quickly producing removalbe partial denture bracket
CN 101401746 B
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.
Claims(2)  translated from Chinese
  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。 A rapid manufacturing removable partial denture process method using a laser power of 100 ~ 200W, beam quality continuous YAG or fiber lasers M2 <1.1, the focal spot size of 10 ~ 100μm; the use of metal or alloy powder comprises stainless steel, cobalt - chromium alloy, titanium or a titanium alloy powder, powder of particle size less than 45μm, but the maximum particle size of the powder is not less than 10μm; as used metal or stainless steel or cobalt alloy powder - when chromium alloy, stainless steel material of the metal substrate , the use of metal or alloy powder is pure titanium or titanium alloy materials, material for titanium metal substrate; specific processing steps include: (1) obtain the patient's mouth biting plaster mold to obtain a three-dimensional model of the dental patient data, and then using three-dimensional data generation CAD parts models; using Magics software parts slope is too large or thin-walled add the location to save the position after the thin-walled serrated support for the STL file, the STL file input SLM rapid prototyping equipment from discrete sections layered software generates laser machining NC code; (2) having a thickness of 25 ~ 40mm metal substrate is preheated to 80 ~ 100 ℃, and incubated in the whole laser molding process; (3) on the metal substrate surface a layer of 20 ~ 60μm thickness preset The powder layer, laser laser machining NC code based on the path set by scanning the powder layer, so that a flat metal or alloy powder melted layer is formed on the metal substrate; when the layer processing, laser molding process parameters: laser power 150 ~ 200W, the laser beam spot 10 ~ 100μm, the amount of overlap 0.01 ~ 0.03mm, scanning speed 50 ~ 250mm / s; (4) the metal substrate fall 10 ~ 30μm, and re-melted pre-layer 20 on the layer ~ 60μm The thickness of the powder layer; (5) the use of a laser according to path setting powder of metal or alloy layer is re-scan the preset molding, to form a new molten layer; laser forming process parameters: laser power 100 ~ 200W, the laser beam spot 10 ~ 100μm, the amount of overlap 0.01 ~ 0.05mm, scanning speed 50 ~ 1000mm / s; (6) Repeat the above steps (4) and (5), until the completion of the entire part of melt accumulation and processing; (7) the metal substrate and parts into a temperature of 500 ~ 800 ℃ in inert gas or vacuum heat treatment furnace, heat 1 to 2 hours after cooling in the furnace; (8) the part cut off from the metal substrate, remove the thin wall support, and the part surface sandblasting, to give 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 according to claim 1, wherein: step (4), the decline in the metal substrate 20 μ m.
Description  translated from Chinese

一种快速制造可摘局部义齿支架的方法 A fast removable partial denture fabrication method

技术领域 Technical 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 belongs to the field of oral medicine manufacturing prosthesis, in particular to a method of selective laser melting technique rapid manufacturing of removable partial denture.

背景技术 Background

[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, accounting for about 24% ~53% natural mouth. 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。 Scaffolding removable denture because of the relatively low price, wear more convenient, comfortable and is one of dentition defects were 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 material with metal and plastic types, metal stent was superior mechanical properties of plastic stents, long-term use in the oral cavity is not deformed or broken, and the metal bracket on the premise of ensuring the performance of the thinner, the patient feels 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 medical research and development goals.

[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] There are currently manufacturing a partial denture metal stent technology includes casting, powder metallurgy and superplastic forming 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。 Among them, the most widely used technique in clinical medicine is cast, although the principle of the technique is simple and easy for the operator to possession, but it's tedious process, but the complexity of the shape of denture frameworks, thin wall casting metal is difficult to ensure complete filling prone to a variety of metallurgical defects. 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 of the light metal titanium and titanium alloy with good mechanical properties and excellent biocompatibility become the preferred oral metal 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 high melting point of titanium and titanium alloy materials, easily oxidized, easy molding, 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 technology, but the process is more complicated, the low bond strength of the prepared stent, and requires a small amount of copper powder and other low-melting alloy to improve the strength of the stent in the alloy powder, but the component may take to some of the side effects on 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 great material limitations, currently only for 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。 In the ultra-molding process due to not fully fit between the die and the workpiece material, and because the forming process influence of thermal expansion and inflatable thickness distribution forming member, there are differences, resulting in the size of the bracket 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 process, there are some common drawback: all need to make a mold, the entire manufacturing process cumbersome and not standardized, long cycle, high cost, and often quality problems. 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。 Because of poor accuracy, bracket removable partial dentures in place a low, adaptation and retention is less stable and therefore there will be wearing deviation, resulting in discontinuity, the patient had an uncomfortable feeling, and even oral tissue deformation , pain and other symptoms, so many patients are not satisfied with the denture metal stents.

[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] partial denture frameworks for complex irregular shapes and personalized features, no mold, high precision, short cycle and highly automated production methods became a new direction, metal laser rapid prototyping technology is adapted to this development 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 rapid prototyping manufacturing technology to 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 because of the effect of the laser spot large, generally Imm around, dimensional accuracy and surface finish of the resulting metal parts than the poor, for the production of high precision large metal blank. 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) by roller or squeegee dusting, a focused laser beam to make a direct manufacturer achieve selective scanning melting powder metal parts depend on the graphics, 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。 Denture stent complex shape, thin wall, because of the relatively large slope surfaces and thin-walled, laser molding process can be influenced slope surfaces and thin terminated; and because most of them are thin-walled parts shaped structure, thermal stress generated during molding can cause irreversible deformation parts make parts scrapped. 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, at home and abroad, no metal laser rapid prototyping technology successfully manufacture removable partial denture reported.

发明内容 DISCLOSURE

[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 to overcome the deficiencies, to provide a rapid manufacturing removable partial denture process method, this method can produce high precision and high surface finish, no distortion and has excellent mechanical properties removable partial denture.

[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 rapid manufacturing process for removable partial denture frameworks, using a laser power of 100~ 200W, beam quality of M2 <continuous YAG or fiber laser 1.1, the focus spot size of 10~100 μ m; As used metal or alloy powder comprises stainless steel, _ a cobalt-chromium alloy, titanium or a 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; as used metal or stainless steel or cobalt alloy powder - When chromium alloy, stainless steel material of the metal substrate, a metal or alloy used when pure titanium or titanium alloy powder material, 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) obtain the patient's mouth biting plaster mold to obtain a three-dimensional data in patients with dental Chung model, and then use the data to generate three-dimensional CAD part models; using Magics software parts slope is too large position jagged thin-walled or thin-walled add location support After saving the STL file, the STL file input SLM rapid prototyping equipment from discrete sections layered software, laser machining NC code generation;

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

[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) pre-layer 20~60 μ m thickness of the powder layer on the surface of the metal substrate, laser according to the path of the laser machining NC code is set to scan the powder layer, the metal or metal alloy powder on a substrate melt layer formed flat; when the layer processing, laser molding process parameters: the laser power 150~200W, the laser beam spot 10~100 μ m, the amount of overlap 0. 01~0 03mm, 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, 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) the use of a laser according to the path set by the metal or alloy powder layer to re-scan the preset molding to form a new molten layer; laser forming process parameters: the laser power 100~200W, the laser beam spot 10~ . 100 μ m, the amount of overlap 0. 01~0 05mm, 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) Repeat the above steps (4) and (5), until the completion of the entire part of melt accumulation and processing;

[0013] (7)将金属基板和零件放入温度为500〜800C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) of the metal substrate and the parts into a temperature of 500~800 C in inert gas or vacuum heat treatment furnace, heat 1 to 2 hours after cooling in 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, remove the thin wall support, and the parts of the surface sandblasted to give 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, die-less final shape, the manufacturing process does not require mold casting or forging model, independent of 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) The slope of the denture is too large or thin-walled position location method of adding auxiliary support to solve since the slope or wall surface is too thin, laser molding process leading to the termination of the puzzle.

[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) of the substrate preheating and molding throughout the incubation period, reducing the formation of laser molding process workpiece stress, thereby reducing the amount of deformation due to thermal stresses lead to denture to ensure the dimensional accuracy of denture . 同时热的粉末也增加了对激光的吸收率。 Meanwhile heat the powder also increases the absorption rate of the laser.

[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) The individual laser processing parameters for processing the first layer of powder, the first layer of powder to overcome the high thermal conductivity is completely melted and the substrate to obtain a solid combination, flat metal melt layer, dusting and ensure follow-up smooth laser molding.

[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 size range of metal or alloy powder, dusting thickness optimization, forming cylinder drop height and laser processing technology, combined with high beam quality of solid-state laser laser molding to achieve high accuracy and surface denture bracket

光洁度ο Finish ο

[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) of the denture and the substrate whole heat treatment, can basically eliminate internal residual stress denture frameworks to further improve the mechanical properties of 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 part of a three-dimensional solid model of removable partial denture stent;

[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 three-dimensional solid model of the part after adding jagged thin wall support.

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 of the present invention will be further described 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。 Figure 1 is based on a three-dimensional solid parts of the patient's dentition defect oral designed removable partial denture, features have 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 the use of Magics software to add a zigzag pattern shown in Figure 1 support after the thin-walled parts shown.

[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] Figure 2 shows here. 1 and is to be better with the embodiments described the implementation process of the 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 steel removable partial denture

[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。 Save 3D component model will add a jagged thin wall shown in FIG. 2 after the support for STL format, slicing software using stratified discrete generate laser CNC instruction. 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, material denture frameworks for size <45 μ m of stainless steel alloy powder, with 25mm thick stainless steel plate as the substrate, dusting thickness 60 μ m, dusting speed 3. Om / min, shaping 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] The first layer: laser power of 150W, the scanning speed of 50mm / s, the amount of overlap of laser processing 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500C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, will together into the substrate and the workpiece temperature of 500 C in an argon atmosphere heat treatment furnace, heat 2 hours, and 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 methods Wire cut parts from the substrate, removing the thin-walled support. 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。 Forming the removable partial denture density close to 100%, excellent mechanical properties, dimensional accuracy disabilities 0. 1mm, the surface roughness Ra of 8~10 μ m, forming part of the follow-up surface blasting, such as processing, 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

[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。 Save 3D component model will add a jagged thin wall shown in FIG. 2 after the support for STL format, slicing software using stratified discrete generate laser CNC instruction. 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。 Selection continuous DPSSL, material denture frameworks for size <Co-Cr alloy powder 40 μ m to 30mm thick stainless steel plate as the substrate, dusting thickness 40 μ m, dusting speed 3. Om / min , shaping each cylinder drop height 20 μ m, the production process with high purity argon.

[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] The first layer: Laser power 150W, the scanning speed of 150mm / s, the amount of overlap 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 layers: the laser power 150W, scanning speed 500mm / s, the amount of overlap 0. 03mm.

5[0034] 激光成型完毕后,将基板和工件一起放入温度为650C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, will together into the substrate and the workpiece temperature of 650 C in an argon atmosphere heat treatment furnace, heat 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 methods Wire cut parts from the substrate, removing the thin-walled support. 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。 Forming the removable partial denture density 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。 Forming part of the follow-up surface blasting, such as processing, 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 fast in making titanium alloy removable partial denture

[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。 Save 3D component model will add a jagged thin wall shown in FIG. 2 after the support for STL format, slicing software using stratified discrete generate laser CNC instruction. 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。 Selection continuous Yb fiber lasers, materials for denture stent size <Ti-6A1-4V alloy powder 20 μ m to 40mm thick titanium plate as the substrate, dusting thickness 20 μ m, dusting speed 3. Om / min , shaping each cylinder drop height 20 μ m, the production process with high purity argon.

[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] The first layer: laser power of 160W, the scanning speed of 150mm / s, the amount of overlap 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 layers: the laser power 140W, scanning speed 800mm / s, the amount of overlap 0. 01mm.

[0038] 激光成型完毕后,将基板和工件一起放入温度为800C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, will together into the substrate and the workpiece temperature of 800 C in vacuum heat treatment furnace, heat 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 methods Wire cut parts from the substrate, removing the thin-walled support. 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。 Forming the removable partial denture density close to 100%, excellent mechanical properties, dimensional accuracy disabilities 0. 2mm, surface roughness Ra of 8~10 μ m, forming part of the follow-up surface blasting, such as processing, 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。 [0039] The use of the present invention is manufactured parts of the surface roughness Ra of 8~10 μ m, after subsequent sandblasting the 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。 Specific embodiments of the present invention is not limited to the above-exemplified one, by selecting the metal or alloy powders of different particle sizes and types, with different laser processing parameters, the present invention may be implementation in various ways, and the invention can achieve good results.

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Classifications
International ClassificationA61C13/12
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