| Publication number | CN103111756 B |
| Publication type | Grant |
| Application number | CN 201310047368 |
| Publication date | Sep 9, 2015 |
| Filing date | Feb 5, 2013 |
| Priority date | Feb 5, 2013 |
| Also published as | CN103111756A |
| Publication number | 201310047368.9, CN 103111756 B, CN 103111756B, CN 201310047368, CN-B-103111756, CN103111756 B, CN103111756B, CN201310047368, CN201310047368.9 |
| Inventors | 余振新 |
| Applicant | 余振新 |
| Export Citation | BiBTeX, EndNote, RefMan |
| Patent Citations (5), Classifications (4), Legal Events (3) | |
| External Links: SIPO, Espacenet | |
技术领域 TECHNICAL FIELD
[0001] 本发明涉及常温下选择性激光烧结成型技术设备领域，具体涉及激光烧结成型设备的激光光路引导系统 [0001] The present invention relates to room temperature, the selective laser sintering technology equipment in the field, particularly relates to a laser sintering equipment laser optical guidance systems
背景技术 Background technique
[0002] SLS技术(SLS:Selective Laser Sintering，粉末材料选择性激光烧结)是一种快速成型工艺，将材料粉末铺洒在已成形零件的上表面，并刮平；用高强度的C02激光器在刚铺的新层上扫描出零件截面；材料粉末在高强度的激光照射下被烧结在一起，得到零件的截面，并与下面已成形的部分连接；当一层截面烧结完后，铺上新的一层粉末材料，选择地烧结下层截面。 [0002] SLS technology (SLS: Selective Laser Sintering, Selective Laser Sintering powder material) is a rapid prototyping process, the material powder spreading ballast on the surface has been molded parts, and Calibrating; C02 with high intensity laser new layer just laid on a part-sectional scanning; material powder at a high intensity laser irradiation are sintered together, give a cross section of parts, and part with the following connections have been formed; when one cross-section after sintering, covered new a layer of powder material, the lower cross-section is selectively sintered. 总而言之，SLS技术是采用激光有选择地分层烧结固体粉末，并使烧结成型的固化层层层叠加生成所需形状的零件。 In summary, SLS technology is the use of a laser to selectively sinter layered solid powder, and sintering the laminated layers of cured applied to generate the desired shape of the part. 其整个工艺过程包括CAD模型的建立及数据处理、铺粉、烧结以及后处理等。 The entire process including the establishment of data processing and CAD model, dusting, sintering and post-processing.
[0003] SLS技术的光学部分是整机组成的核心之一，这是因为:1)激光源的性能、功率、输出模式等决定成型技术实现的可能与否以及成型构件的质量；2)激光源占整台设备的成本达20%以上；3)激光源的研发正在迅速发展中，是激光工业技术应用的重要部件；4)相关的光路引导系统随着应用目标的不同有着特殊的设计要求:必须考虑到会聚到材料上的光斑线度以及激光束移动精度等。 [0003] The optical portion SLS technology is one of the core composition of the machine, because: 1) the performance of the laser source, the power output mode, and determines whether or not the quality of the molding member may molding technology; and 2) laser source accounted for the entire equipment cost more than 20%; R & D 3) laser source is rapidly developing, is an important component of industrial laser technology applications; 4) associated with different optical path guiding system has special design requirements of the application goal : it must take into account the converged light spot on the line of the material and the laser beam moving accuracy. 因此，恰当地选择和改善SLS技术中的激光光路引导系统具有重要的甚至革新性的意义。 Therefore, proper selection and improvement of SLS technology in laser optical guidance systems has important significance even innovative.
[0004] 在SLS技术中，常用的粉末材料有蜡、聚碳酸酯、尼龙、纤细尼龙、合成尼龙、陶瓷、玻璃、金属等。 [0004] In the SLS technique, commonly used powder materials are wax, polycarbonate, nylon, thin nylon, synthetic nylon, ceramic, glass, metal or the like. 激光束照射到粉材表面时，一部分反射一部分透入材料内被吸收，进而对材料起熔结作用。 When the laser beam is irradiated to the surface of the powder material, a portion of the reflected portion is absorbed penetrate into the material, and then sintering the material plays the role. 不同的材料对不同波长的光吸收和反射有很大的差别。 Different materials have very different absorption and reflection of light at different wavelengths. 一般而言，电导率高的金属材料对光波的反射率也高，表面光亮度高的材料反射率也高。 Generally, high conductivity metal materials is also high light reflectance, high light reflectivity of the surface material is high. 一般金属粉末烧结选用Nd:YAG激光器，因为金属粉末对CO2激光器的激光反射率要大得多。 General metal powder sintering chosen Nd: YAG laser, since the laser reflectivity of the metal powder CO2 laser is much greater. 陶瓷粉末也选用Nd: YAG激光器。 Ceramic powder also use Nd: YAG laser. 高分子塑料类材料如聚碳酸酯等可用0)2激光器，因为聚碳酸酯在5.0〜10.6 μ m波长范围内有很高的吸收率。 Polymer plastic material such as polycarbonate or the like can be used 0) 2 laser, since the polycarbonate in a 5.0~10.6 μ m wavelength range has a high absorption rate.
[0005] 激光器的输出模式会严重的影响激光加工效果。 [0005] The laser output mode will seriously affect the laser processing effect. 横模决定激光束光波场在空间的展开程度，低阶模能量比较集中，在实际使用中，尽量选用TEM(I(I模(单横模)，以便获得尽可能高的功率密度光束。 Transverse mode laser beam wave field determine the spatial extent of expansion, low-order mode energy more concentrated, in actual use, try to use TEM (I (I-mode (single transverse mode) in order to obtain the highest possible power density beam.
[0006] 在已有的SLS技术中，光路引导系统一般包括:1)光路偏转和控制系统，如多组反射镜；2)聚焦系统，如凸透镜、凹面镜。 [0006] In the existing SLS technology, optical guidance systems generally include: 1) the optical path deflecting and control systems, such as multiple sets of mirrors; 2) focusing system, such as convex, concave mirror. 3)匀光系统，用于形成能量分布均匀的光斑。 3) dodging system, spot energy distribution for forming. 已有的是:3a)分割叠加变换系统。 Existing is: 3a) dividing superimposed conversion system. 将基模或低阶模高斯光束平行分割成几个子系统，并沿着分割线平行及垂直两个方向分别进行放大，最后将子光束按一定的相对位置进行叠加，以获得横截面内能量分布较均匀的光斑。 The split mode Gaussian beam mode or low-level parallel group into several subsystems, and amplified along the dividing lines are parallel and perpendicular directions, and finally the sub-beam by a certain relative positions are superimposed to obtain the energy distribution within the cross-section more uniform spot. 3b)积分镜系统。 3b) integral mirror system. 用以一定规律排列的反射镜或投射镜将强度不均匀的光束进行分割，并使反射光束或投射光束在其焦点上叠加，产生积分作用而获得均匀的光斑。 For certain regular arrangement of mirrors or mirror the uneven intensity of the projection beam is divided, and the reflected light beam or projection beam focus on its superposition integral role to produce a homogeneous spot. 3c)振镜系统。 3c) galvanometer system. 采用高频振荡的镜片，使光束沿与扫描方向垂直的方向高频振动，在热处理过程中，产生一条均匀较宽的能量分布。 High frequency oscillation of the lens, the beam along a direction perpendicular to the scanning direction of high-frequency vibrations, in the heat treatment process, resulting in a broad energy distribution uniform.
[0007]目前已有的资料没有详细地介绍SLS技术中激光器的选择和调制方法、对光学引导部分的介绍也各有特色。 [0007] Currently available data did not introduce SLS laser technology in the selection and modulation methods in detail, the description of the optical guide section has its own characteristics. 但目前的激光光路引导系统对于光束容易飘逸，尘埃容易落日机器内部，对光路产生不良影响，光能量损耗多，系统调试难。 However, the current system for guiding laser beam path is easy and elegant, the dust inside the machine easy to sunset, adversely affect the optical path, the light energy loss and more, system debugging difficult.
发明内容 SUMMARY OF THE INVENTION
[0008] 本发明的目的是为我们独立研宄的一种常温下和开放环境中实现的SLS技术提供有效的、安全的、稳定的光学系统设计。 [0008] The object of the present invention is to provide an effective, safe, and stable optical system design at an independent study based on the ambient temperature and open environment for us to achieve the SLS technology.
[0009] 为达到上述目的，本发明采用如下技术方案: [0009] To achieve the above object, the present invention adopts the following technical scheme:
[0010] 激光烧结成型设备的激光光路引导系统，包括激光源、与该激光源配合的扩束镜、与该扩束镜配合的扫描振镜装置和与该扫描振镜装置连接的平场聚焦透镜；激光烧结成型设备设有成型平台，平场聚焦透镜的焦点落于该成型平台的中心。 [0010] Laser sintering equipment laser optical guidance system includes a laser source, the laser light source with a beam expander, and scanning galvanometer means the beam expander lens fitted and flat-field focusing the scanning galvanometer connected devices lens; laser sintering equipment has shaped platform, flat-field focusing lens focal point fall in the center of the molded platform.
[0011] 进一步，所述激光源、所述扩束镜和所述扫描振镜装置沿着X轴方向分布，所述平场聚焦透镜和所述扫描振镜装置沿着Y轴方向分布，X轴和Y轴垂直；激光源发出的激光先沿着X轴射出，然后通过扫描振镜装置变换方向，沿着Y轴射向所述成型平台。 [0011] Further, the laser source, the beam expander and the scanning galvanometer means distributed along the X-axis direction, the flat field focusing lens and the scanning galvanometer means distributed along the Y-axis direction, X the vertical axis and the Y-axis; the first laser light emitted from the laser light source is emitted along the X-axis, and then change direction by galvanometer scanning means, along the Y axis toward the forming internet.
[0012] 进一步，所述激光源包括激光器和与该激光器连接的射频脉冲电源；激光器为CO2激光器(CO2: 二氧化碳)，由50MHz的所述射频脉冲电源调制，从而输出5kHz的脉冲激光。 [0012] Further, the laser light source comprises a laser and radio frequency pulse power is connected to the laser; laser is a CO2 laser (CO2: carbon dioxide), the 50MHz of modulation of the radio frequency pulse power, so that the output of a pulsed laser 5kHz.
[0013] 进一步，所述激光器的外壁设有散热片，且还套设有用于防尘的外罩，该外罩上设有风扇。 [0013] Further, the outer wall of the laser with a heat sink, and also provided cover for the dust jacket, with a fan on the housing.
[0014] 进一步，所述扩束镜为一组ZnSe透镜(ZnSe:砸化锌)，该组ZnSe透镜由前透镜和后透镜构成，前透镜焦点和后透镜焦点重合，该组ZnSe透镜为对10.6 μ m波长光透过率达92%或以上，并对其进行扩束。 [0014] Further, the beam expander lens for a group of ZnSe (ZnSe: smashing zinc), the set of ZnSe lenses from the front lens and the rear lenses, lens focal point coincides with the front and rear lens focal point, this group is for ZnSe lenses 10.6 μ m wavelength light transmission rate of 92% or more, and its beam expander.
[0015] 进一步，所述扫描振镜装置由振镜电机、振镜控制板和两个相互垂直的平面镜组成；振镜控制板连接振镜电机，且振镜电机连接平面镜。 [0015] Further, the device consists of scanning galvanometer galvanometer motors, galvanometer control panel and two mutually perpendicular plane mirrors; galvanometer galvanometer motor control board, and the plane mirror galvanometer motor connections.
[0016] 进一步，所述聚焦透镜是平场聚焦透镜，采用ZnSe单晶材料制成且镀有增透膜层O [0016] Further, the focusing lens is a flat field focusing lens, using ZnSe single crystal material and coated with antireflection film O
[0017] 进一步，所述聚焦透镜为针对10.6 μπι波长的焦距是435mm的透镜。 [0017] Further, the focusing lens is wavelength for 10.6 μπι is a lens focal length of 435mm.
[0018] 进一步，所述激光光路引导系统，其还包括控制装置，该控制装置由控制系统计算机和与振镜控制器构成，控制系统计算机和与振镜控制器连接，控制系统计算机连接所述激光源，振镜控制器连接所述扫描振镜装置。 [0018] Further, the laser light path guidance system, which also includes a control means, the control means by the control system computer and a galvanometer controller configuration, the control system computer and a connection to the galvanometer controller, connected to the computer control system laser source, the galvanometer scanning galvanometer controller connected devices.
[0019] 进一步，所述激光源、所述扩束镜、所述扫描振镜装置和所述平场聚焦透镜之间，均通过密封且防尘的部件连接。 [0019] Further, the laser source, the beam expander, the scanning galvanometer means and between said flat field focusing lens components are sealed and dustproof connection.
[0020] 与现有技术相比，本发明的有益效果如下: [0020] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0021] 1、本发明是一种实现智能化激光烧结成型的直接制造工业技术的光学系统，具体地是实现常温下选择性激光烧结成型技术(SLS)的激光光路引导系统；本发明不仅能很好地实现三维构件的打印，而且各光学零件之间无隙衔接成一体，避免了光束的漂移，同时防尘抗震；此外，设计中也考虑到对振镜等光学元件的保护；光路引导系统结构紧凑，光路短，光能量损耗少；系统调试容易。 [0021] 1, the present invention is an intelligent laser sintering direct manufacturing industrial technology optical system, in particular to achieve room temperature Selective Laser Sintering technology (SLS) laser light path guiding system; the present invention is not only achieve a good print three-dimensional members, but no backlash integral link between the optical components, to avoid the drift beam, while dust earthquake; in addition, the design also takes into account the optical element such as galvanometer protection; optical guide System compact optical path is short, less light energy loss; the system debugging easy. 激光移动精度可达0.1_±0.05_。 Precision laser moving up 0.1_ ± 0.05_.
[0022] 2、本发明激光源把连续激光加以调制成脉冲激光输出，可以增加峰值输出功率，并使得加热时间缩短，热扩散减少，有利于高分子材料熔结及冷却，把体胀效应降至最小； [0022] 2, the laser light source of the present invention, a continuous laser is modulated into a pulse laser output, peak output power can be increased, and so the heating time by thermal diffusion reduced in favor of high-molecular materials sintered and cooled, the expansion effect body drop to a minimum;
[0023] 3、扩束镜对10.6 μ m波长的激光5倍扩束后将改善光束的准直性，同时可使扫描振镜承受的光波能量密度更低，更好地保护振镜，延长其使用寿命；并且，扩束镜可令激光在成型平台聚焦时获得更小的光斑。 [0023] 3, after the beam expander to 10.6 μ m wavelength of the laser beam expander 5-fold improvement in beam collimation, while scanning galvanometer can withstand lower light energy density, better protect galvanometer, extended its life; and can make the laser beam expander to get smaller spot in the molding platform focus. 由于功率密度和扫描密度等能明显地影响烧结特征，更精细的光斑可以获得更高的成型质量； As the power density and scanning density can significantly affect the sintering characteristics, finer spot can achieve higher quality molding;
[0024] 4、扫描振镜装置的结构，能更好地针对脉冲激光匀光，而且定位精确，激光束在成型平台处的移动精度可达0.lmm±0.05mm。 [0024] 4, scanning galvanometer mirror device structure, better even for pulsed laser light and precise positioning of the laser beam in a mobile platform at the precision molding up 0.lmm ± 0.05mm.
[0025] 5、采用本发明中的聚焦透镜，激光束聚焦后的近轴倾角不超过±20° ;若激光烧结成型设备对零部件的成型范围是400mm*400mm*350mm，因为平场聚焦透镜被安置在成型平台上方不超过500mm高处，使得激光在材料表面的入射角很小，所以不必添加额外的部件变换为圆偏振光，也不需考虑偏振特性对成型质量的影响； [0025] 5, with the present invention, a focusing lens, the near-axis angle of the laser beam focused by no more than ± 20 °; if laser sintering equipment parts forming range is 400mm * 400mm * 350mm, since the flat-field focusing lens is positioned above the molding platform is not more than 500mm height, so that the laser material surface at an incident angle is small, so do not add additional components into circularly polarized light, and need not consider the effect of the polarization properties of the molding quality;
[0026] 6、采用控制装置，进行实时的参数调节，例如对于连续激光，激光辐照时间由激光扫描速度决定；对于脉冲激光，激光辐照时间由脉宽和激光扫描速度共同决定，可根据经验及对构体分层后截面图的分析，预先设定好参数，设备也可以自动进行激光快速成型直至整个构件被打印完成。 [0026] 6, using the control means, in real-time parameter adjustment, for example, a continuous laser, the laser irradiation time is determined by the laser scan speed; for pulsed laser, the laser irradiation time determined by the pulse width and laser scanning speed, according to Experience and sectional view after isomers stratified analysis, pre-programmed parameters, the device can also automatically perform laser rapid prototyping until the entire component is printed.
[0027] 7、本发明达到刚性联接，且无隙密封以达到光路无尘干扰、稳定的目的。 [0027] 7, the present invention is to achieve a rigid connection, and no gap seal in order to achieve clean optical path interference, stability purposes.
附图说明 Brief Description
[0028]图1是本发明激光烧结成型设备的激光光路引导系统的原理图，图中箭头为激光的发射方向； [0028] FIG. 1 is a laser sintering apparatus of the present invention, the laser light path guidance system schematic diagram of the laser emission direction arrows;
[0029] 图2是图1的立体结构示意图； [0029] FIG. 2 is a perspective structure diagram of Figure 1;
[0030] 图3是图2沿着A方向的仰视示意图； [0030] FIG. 3 is a bottom 2 along the direction A schematic diagram;
[0031] 图中，1-激光源；11-激光器；111-外罩；112-风扇；12-射频脉冲电源；121-电源滤波器；2_扩束镜；3_扫描振镜装置；31_平面镜；4_平场聚焦透镜；5_控制装置；51_控制系统计算机；52_振镜控制器；6_成型平台。 [0031] FIG, 1 laser light source; 11- laser; 111- housing; 112- fan; 12- RF pulse power; 121- power filter; 2_ beam expander; 3_ scanning galvanometer means; 31_ plane mirror; 4_ flat field focusing lens; 5_ control means; 51_ computer control system; 52_ galvanometer controller; 6_ molding internet.
具体实施方式 DETAILED DESCRIPTION
[0032] 如图1至图3所示实施例的激光烧结成型设备的激光光路引导系统，包括激光源1、与该激光源配合的扩束镜2、与该扩束镜2配合的扫描振镜装置3和与该扫描振镜装置3连接的平场聚焦透镜4 ;激光烧结成型设备设有成型平台6，平场聚焦透镜4设于和该成型平台6配合的位置处。 [0032] FIGS. 1 to the embodiment shown in laser sintering equipment laser optical guidance system 3, includes a laser source 1, and the laser light source with a beam expander 2, the beam expander with a scanning galvanometer mirror 2 mirror means 3 and the flat-field scanning galvanometer means 3 connected to the focusing lens 4; laser sintering apparatus is provided at a position forming platform 6, flat field focusing lens 4 provided on the platform 6 and the molded fit.
[0033] 激光源1、扩束镜2和扫描振镜装置3沿着X轴方向分布，平场聚焦透镜4和扫描振镜装置3沿着Y轴方向分布；激光源I发出的激光先沿着X轴射出，然后通过扫描振镜装置3变换方向，沿着Y轴射向成型平台6。 [0033] laser source 1, a beam expander 2 and scanning galvanometer mirror means 3 distributed along the X-axis direction, flat field focusing lens 4 and the scanning galvanometer means 3 distributed along the Y-axis direction; laser light emitted from the laser source I first along the X-axis exit, and then scanning galvanometer means 3 changes of direction, along the Y axis toward the molding platform 6. 本实施例中X轴和Y轴相互垂直。 Examples X-axis and Y-axis perpendicular to each other in this embodiment.
[0034] 激光源I包括激光器11和与该激光器11连接的射频脉冲电源12，激光器11为CO2激光器(CO2:二氧化碳)，由50MHz的射频脉冲电源12调制，输出5kHz的脉冲激光。 [0034] I comprises a laser light source laser 11 and the RF pulse power supply 12 connected to the laser 11, the laser 11 is a CO2 laser (CO2: carbon dioxide), by a 50MHz radio frequency pulse modulation power supply 12, the output of the pulse laser 5kHz. 可利用10.6 μπι波长的激光，在1s的预热后，测得激光平均功率是45.50W。 Available 10.6 μπι wavelength laser, after preheating 1s measured average laser power is 45.50W. 把连续激光加以调制成脉冲激光输出，可以增加峰值输出功率，并使得加热时间缩短，热扩散减少，有利于高分子材料熔结及冷却，把体胀效应降至最小。 The CW laser is modulated into a pulse laser output, peak output power can be increased, and so the heating time by thermal diffusion reduced in favor of high-molecular materials sintered and cooled, the effect of the body to minimize swelling. 在激光器11外壁设有散热片，且还套设有一个金属制成且用于防尘的外罩111，该外罩上设有两个风扇112，用于强迫风冷，加快散热。 In the outer wall of the laser 11 has fins, and also has a metal sleeve and dust cover for 111, 112 is provided with two fans on the cover for forced air cooling, accelerate heat dissipation. 进一步，可对射频脉冲电源12配设一个电源滤波器121，以利于5kHz脉冲激光的稳定输出。 Further, the RF pulse power source 12 is disposed a power supply filter 121, in order to facilitate a stable output pulse laser 5kHz.
[0035] 扩束镜2为一组ZnSe透镜，由前透镜和后透镜构成，前透镜焦点和后透镜焦点重合或几乎重合，该组ZnSe透镜对10.6 μm波长光透过率达92%或以上，并对其进行扩束。 [0035] The beam expander 2 is a group of ZnSe lenses, the front lens and the rear lenses, lens focal front and rear lens focal coincidence or almost coincidence, the group ZnSe lenses for 10.6 μm wavelength light transmission rate of 92% or more , and its beam expander. 扩束作用将改善光束的准直性，同时可使扫描振镜承受的光波能量密度更低，更好地保护振镜，延长其使用寿命；并且，扩束镜2可令激光在成型平台6聚焦时获得更小的光斑。 Beam expander effect will improve the collimated light beam, while allowing light scanning galvanometer withstand lower energy density, better protection of the galvanometer, extending its life; and, 2 beam expanders can make laser molding platform 6 get smaller spot when focusing. 由于功率密度和扫描密度等能明显地影响烧结特征，更精细的光斑可以获得更高的成型质量。 As the power density and scanning density can significantly affect the sintering characteristics, finer spot can achieve higher quality molding.
[0036] 扫描振镜装置3由振镜电机、振镜控制板和两个相互垂直的高反射率的平面镜31组成；振镜控制板连接振镜电机，且振镜电机连接平面镜31，振镜控制板通过振镜电机控制平面镜31的摆动。 [0036] scanning galvanometer means 3 by a galvanometer motors, galvanometer control panel and two mutually perpendicular planes high reflectivity mirror 31 composition; galvanometer galvanometer motor control board, and the plane mirror galvanometer motor connection 31, galvanometer Dashboard swing plane mirror 31 via the galvanometer motor control. 两个相互垂直的高反射率(>98%)的平面镜31实现控制激光光束在X轴、Y轴方向移动，在超过40°时线性度仍保持在99.9%以，最大的读数漂移是50PPM/°C，最大的零漂移是15微弧度每°0，可重复率达2微弧度。 Two mutually perpendicular high reflectivity (> 98%) of the plane mirror 31 to achieve control of the laser beam to move in the X-axis, Y-axis direction, over 40 ° when the linearity remained at 99.9% to the maximum reading drift 50PPM / ° C, the maximum zero drift is 15 microradians 0, repeat rate of 2 micro-radians per °. 采用以上结构，扫描振镜装置3能更好地针对脉冲激光匀光，而且定位精确，激光束在成型平台处的移动精度可达0.lmm±0.05mmo With the above structure, the scanning galvanometer means 3 can be better targeted pulsed laser dodging, and positioning accuracy, precision laser beam forming in a mobile platform at up 0.lmm ± 0.05mmo
[0037] 聚焦透镜4是F- Θ透镜，即平场聚焦透镜。 [0037] The focusing lens 4 is F- Θ lens, ie flat field focusing lens. 聚焦透镜4采用ZnSe单晶材料制成且外镀有增透膜层。 Focusing lens 4 using ZnSe single crystal material and the outer layer antireflection coated. 激光束聚焦后的近轴倾角不超过±20°。 Near axis tilt does not exceed ± 20 ° laser beam is focused after. 若激光烧结成型设备对零部件的成型范围是400mm*400mm*350mm，因为平场聚焦透镜被安置在成型平台上方不超过500mm处，使得激光在材料表面的入射角很小，所以不必添加额外的部件变换为圆偏振光，也不需考虑偏振特性对成型质量的影响。 If the laser sintering equipment parts molding range is 400mm * 400mm * 350mm, since the flat-field focusing lens is placed over the molding platform does not exceed 500mm at the surface of the material so that the laser incident angle is very small, so do not add extra Part converted to circularly polarized light, the polarization properties also need to consider the impact on the quality of the molding.
[0038] 本实施例还包括控制装置5，该控制装置5由控制系统计算机51和振镜控制器52构成，控制系统计算机51和振镜控制器52连接，控制系统计算机51连接激光源1，振镜控制器52连接扫描振镜装置3 ;激光源I和扫描振镜装置3都控制装置5连接、通信。 [0038] The present embodiment further includes a control unit 5, the control unit 5 by the control system computer 51 and 52 constitute a galvanometer controller, control system computer 51 and galvanometer controller 52 connected to the control system computer 51 is connected to the laser source 1, The controller 52 is connected galvanometer scanning galvanometer means 3; a laser source scanning galvanometer means I and 3 are connected to the control unit 5, a communication. 控制装置5由总控制系统控制，主要是软件程序在成型过程中实现有序的、逻辑的自动控制，此也可通过触发电路实现。 Control means 5 by a total control system, mainly software program to achieve an orderly in the molding process, the logic of automatic control, this can also be realized by the trigger circuit. 控制装置5直接调制射频脉冲电源12，并与扫描振镜装置3的振镜控制板自带的控制电路进行通信。 Control means 5 directly modulated RF pulse power supply 12, and the scanning galvanometer galvanometer control panel device 3 comes with a control circuit for communication. 控制装置5具有很灵活简洁的人机互动界面，能进行实时的参数调节:激光扫描速度、激光功率、扫描密度、层厚、扫描方式、放大倍数等。 Control means 5 having flexible simple man-machine interaction interface, real-time parameters can be adjusted: laser scanning speed, laser power, scan density, thickness, scan mode, magnification and the like. 对于连续激光，激光辐照时间由激光扫描速度决定；对于脉冲激光，激光辐照时间由脉宽和激光扫描速度共同决定。 For continuous laser, laser irradiation time is determined by the laser scanning speed; for pulse laser, laser irradiation time is determined by the pulse width and laser scanning speed. 当然，可根据经验及对构体分层后截面图的分析，预先设定好参数，设备也可以自动进行激光快速成型直至整个构件被打印完成。 Of course, based on experience and analysis of the cross-sectional view after isomers layered, pre-programmed parameters, the device can also automatically perform laser rapid prototyping until the entire component is printed.
[0039] 本实施例中所述激光源1、扩束镜2、扫描振镜装置3和平场聚焦透镜4等各部件之间，均通过密封且防尘的部件连接，且均有座垫、密封圈等支承物，达到刚性联接，并要求无隙密封以达到光路无尘干扰、稳定的目的。 [0039] In this embodiment the laser source 1, beam expander 2, scanning galvanometer between the various components of the lens unit 4 and three flat field focus, both through the seal and the dust components are connected and have a seat, seals and other supporting material, to achieve a rigid connection, and requires no gap seal in order to achieve clean optical path interference, stability purposes. 例如在扩束镜2部分，设计了防尘外套和与激光器11衔接的金属密封部件，进入扫描振镜装置3处亦装有防尘密封圈。 For example, in Part 2 beam expanders are designed dust jacket and the convergence of the laser 11 metal sealing member into the scanning galvanometer unit 3 is also equipped with a dust seal.
[0040] 本实施例激光烧结成型技术设备的激光光路引导系统的其它结构参见现有技术。 Other structures [0040] This example laser sintering technology equipment laser optical guidance system implementation, see art.
[0041] 本发明并不局限于上述实施方式，如果对本发明的各种改动或变型不脱离本发明的精神和范围，倘若这些改动和变型属于本发明的权利要求和等同技术范围之内，则本发明也意图包含这些改动和变型。 [0041] The present invention is not limited to the above embodiments, the present invention if various alterations or modifications without departing from the spirit and scope of the invention, within if these modifications and variations of the claims of the present invention and equivalent technical scope, the The present invention is also intended to encompass such changes and modifications.
| Cited Patent | Filing date | Publication date | Applicant | Title |
|---|---|---|---|---|
| CN85201033U * | Apr 1, 1985 | Jan 8, 1986 | 南开大学 | 自冷式二氧化碳激光器 |
| CN102380711A * | Sep 1, 2010 | Mar 21, 2012 | 中国科学院光电研究院 | Selective sintering laser processing system |
| CN202343945U * | Dec 8, 2011 | Jul 25, 2012 | 北京工业大学 | Quickly-forming system for selective laser sintering |
| CN203091969U * | Feb 5, 2013 | Jul 31, 2013 | 余振新 | Laser optical path guide system for laser sinter molding device |
| US5474719 * | Feb 14, 1991 | Dec 12, 1995 | E. I. Du Pont De Nemours And Company | Method for forming solid objects utilizing viscosity reducible compositions |
| International Classification | B23K26/082, B23K26/064, B22F3/105 |
| Cooperative Classification | Y02P10/295 |
| Date | Code | Event | Description |
|---|---|---|---|
| May 22, 2013 | C06 | Publication | |
| Jun 19, 2013 | C10 | Request of examination as to substance | |
| Sep 9, 2015 | C14 | Granted |
