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公开(公告)号：US08164022B2
公开(公告)日：2012-04-24
申请号：US11951997
申请日：2007-12-06
CPC分类号： B23K26/24 , B23K26/032 , B23K26/034 , B23K26/32 , B23K31/125 , B23K2101/006 , B23K2101/18 , B23K2101/34 , B23K2103/08 , B23K2103/50
摘要： Disclosed is the design and working principle of a welding monitoring system that can monitor the spectra of zinc and iron in the plasma generated during a welding process involving zinc-coated steel. The monitoring system is capable of monitoring multiple parameters, including spectral line intensity, electron temperature, and ratio of zinc and iron composition in the plasma. The results can then be used individually or in combination to predict resulting weld quality and generate appropriate feedback control signals.
摘要翻译： 公开了一种焊接监测系统的设计和工作原理，可以监测在涉及镀锌钢的焊接过程中产生的等离子体中的锌和铁的光谱。 监测系统能够监测等离子体中多种参数，包括谱线强度，电子温度和锌和铁组成比。 然后可以将结果单独使用或组合使用以预测所产生的焊接质量并产生适当的反馈控制信号。
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公开(公告)号：US20080210674A1
公开(公告)日：2008-09-04
申请号：US11951997
申请日：2007-12-06
CPC分类号： B23K26/24 , B23K26/032 , B23K26/034 , B23K26/32 , B23K31/125 , B23K2101/006 , B23K2101/18 , B23K2101/34 , B23K2103/08 , B23K2103/50
摘要： Disclosed is the design and working principle of a welding monitoring system that can monitor the spectra of zinc and iron in the plasma generated during a welding process involving zinc-coated steel. The monitoring system is capable of monitoring multiple parameters, including spectral line intensity, electron temperature, and ratio of zinc and iron composition in the plasma. The results can then be used individually or in combination to predict resulting weld quality and generate appropriate feedback control signals.
摘要翻译： 公开了一种焊接监测系统的设计和工作原理，可以监测在涉及镀锌钢的焊接过程中产生的等离子体中的锌和铁的光谱。 监测系统能够监测等离子体中多种参数，包括谱线强度，电子温度和锌和铁组成比。 然后可以将结果单独使用或组合使用以预测所产生的焊接质量并产生适当的反馈控制信号。
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公开(公告)号：US09981341B2
公开(公告)日：2018-05-29
申请号：US14834806
申请日：2015-08-25
申请人： Jyoti Mazumder , Lijun Song
发明人： Jyoti Mazumder , Lijun Song
IPC分类号： B23K26/342 , B23K26/03 , B29C67/00 , B23K31/12 , B33Y50/02
CPC分类号： B23K26/032 , B23K26/342 , B23K31/125 , B23K2101/34 , B23K2103/04 , B29C64/386 , B33Y50/02 , G06N5/047
摘要： An additive manufacturing process is monitored, in situ, using optical emission spectroscopy to analyze the composition, phase transformation or manufacturing defects. The system or method may include an analysis of contours of the plasma line intensity, or pre-processing of the plasma spectral line including signal-to-noise ratio analysis, baseline removal, line identification, line de-convolution and fitting. Improvements may additionally involve consideration of plasma parameters such as plasma spectral line intensity, line ratio, plasma temperature and electron density using high-resolution optical emission spectroscopy in both visible and ultraviolet regions. Parameters of the plasma may be determined using an intensity ratio of the ions or atoms emission lines, a FWHM of the line profile for electron density estimation, or a Boltzmann plot for plasma temperature estimation. One or more techniques may be used to monitor when there is a lack of deposition.
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4.发明申请Method of fabricating composite tooling using closed-loop direct-metal deposition 有权使用闭环直接金属沉积制造复合模具的方法公开(公告)号：US20050038551A1
公开(公告)日：2005-02-17
申请号：US10652260
申请日：2003-08-29
申请人： Jyoti Mazumder , Frank DiPietro
发明人： Jyoti Mazumder , Frank DiPietro
CPC分类号： B23K26/34 , B22F3/1055 , B22F2005/002 , B22F2998/00 , B23K26/32 , B23K31/025 , B23K2103/08 , B23K2103/10 , B23K2103/18 , B23K2103/50 , Y02P10/295 , B22F7/04
摘要： Manufacturing tools having a base and a working surface, such as trim steels, flange steels and die inserts, are formed by fabricating or casting a substrate out of a relatively ductile, low wear-resistant metal and forming the working surfaces such as cutting edges, flanging surfaces, die surfaces and die inserts by depositing layers of relatively hard, wear-resistant materials to the substrate by closed-loop direct-metal deposition or laser cladding. A multi-axis numerically controlled robot may be used to position and move a beam and deposition material over large substrates in forming such tooling.
摘要翻译： 通过从相对延性低的耐磨金属中制造或铸造基材而形成具有底座和工作表面的制造工具，例如修边钢，法兰钢和模具嵌入件，并形成工作表面，例如切削刃， 通过将相对硬的耐磨材料层通过闭环直接金属沉积或激光熔覆沉积到衬底上，从而将表面，模具表面和模具插入件翻转。 可以使用多轴数控机器人来将梁和沉积材料定位和移动到大的基板上以形成这种工具。
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公开(公告)号：US06793140B2
公开(公告)日：2004-09-21
申请号：US10044331
申请日：2002-01-10
申请人： Jyoti Mazumder
发明人： Jyoti Mazumder
IPC分类号： G06K1900
摘要： Direct metal deposition (DMD™), preferably closed-loop DMD, is used to deposit machine-readable codes onto articles with high accuracy, directly from digital data. In different embodiments, the substrate/layer combination may be tailored for improved wear resistance, thermal conductivity, density/hardness, corrosion and/or resistance to corrosion, oxidation or other environmental conditions. Alternatively, the layer(s) of material may be tailored to have specific properties custom-tailored to suit the application. To enhance throughput, code features may be fabricated using a robotic closed-loop DMD arrangement. In concert with the improvements made possible through the tailored outer layer(s), the method may further include the step of incorporating a third dimension by controlling the height of the deposit line in addition to the width.
摘要翻译： 直接金属沉积（DMD TM），优选闭环DMD，用于将机器可读代码以高精度直接从数字数据存储在物品上。 在不同的实施方案中，可以调整基底/层组合以改善耐磨性，导热性，密度/硬度，腐蚀和/或抗腐蚀，氧化或其它环境条件。 或者，材料层可以被定制成具有定制的特定属性以适合应用。 为了提高吞吐量，可以使用机器人闭环DMD布置来制造代码特征。 与通过定制的外层可能实现的改进一致，该方法还可以包括除了宽度之外还通过控制沉积线的高度来并入第三维度的步骤。
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公开(公告)号：US06553275B1
公开(公告)日：2003-04-22
申请号：US09522671
申请日：2000-03-10
申请人： Jyoti Mazumder
发明人： Jyoti Mazumder
IPC分类号： G06F1900
CPC分类号： G01L5/0047
摘要： A system and method for monitoring and controlling in real-time the development of residual stress accumulation in a product during its fabrication by a laser-aided, computer-controlled, direct material deposition process. The system includes a laser source, a laser controller and a numerical controller. The material is deposited on a substrate which is equipped with strain gages on its back surface, i.e. the surface opposite to the surface on which material is deposited. The strain gages measure real-time changes in chosen locations and directions, typically in two orthogonal directions along and across the deposition direction. Acoustic and optical sensors are also mounted on locations appropriate for measurement. The strain gage, acoustic sensor and optical sensor measurements are sent to a computer with a stress analysis software package, which uses the strain data as an input to calculate the stress accumulation. The computer is programmed to determine whether critical conditions, such as a pre-determined fraction of the yield strength are reached at any location. Based on this information, the computer sounds a warning signal, or directs a command to the laser controller to adjust the parameters of the laser beam or the laser process, or directs the laser numerical controller to discontinue the process.
摘要翻译： 一种用于通过激光辅助的计算机控制的直接材料沉积工艺在其制造期间实时监测和控制产品中残余应力累积的发展的系统和方法。 该系统包括激光源，激光控制器和数字控制器。 该材料沉积在衬底上，该衬底在其背面上，即与沉积材料的表面相对的表面上配备有应变计。 应变计通常沿着并跨过沉积方向的两个正交方向测量所选择的位置和方向上的实时变化。 声光传感器也安装在适合测量的位置。 应变计，声学传感器和光学传感器测量被发送到具有应力分析软件包的计算机，其使用应变数据作为输入来计算应力累积。 计算机被编程以确定是否在任何位置达到关键条件，例如屈服强度的预定分数。 基于该信息，计算机发出警告信号，或指示激光控制器调整激光束或激光过程的参数，或指示激光数字控制器停止处理。
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公开(公告)号：US08723078B2
公开(公告)日：2014-05-13
申请号：US12623249
申请日：2009-11-20
申请人： Jyoti Mazumder , Seung H. Lee
发明人： Jyoti Mazumder , Seung H. Lee
IPC分类号： B23K9/00
CPC分类号： B23K31/125 , B23K9/02 , B23K26/032 , B23K26/244 , B23K26/32 , B23K2101/006 , B23K2101/18 , B23K2101/34 , B23K2103/04 , B23K2103/08 , B23K2103/50
摘要： A method of monitoring a welding process, comprising detecting a selected portion of a light spectrum of plasma plume of a fusion welding process with a photo detector, processing the detected portion of the spectrum, comparing the detected portion of the spectrum with an expected spectra to determine whether a weld is acceptable, providing a signal to a welder control, and adjusting the weld process based on the signal.
摘要翻译： 一种监测焊接过程的方法，包括用光电检测器检测融合焊接过程的等离子体羽流的光谱的选定部分，处理所检测的光谱部分，将所检测的光谱部分与预期光谱进行比较， 确定焊接是否可接受，向焊工控制提供信号，以及根据信号调整焊接过程。
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8.发明申请公开(公告)号：US20140026730A1
公开(公告)日：2014-01-30
申请号：US13949755
申请日：2013-07-24
申请人： Bhaskar Dutta , Harshad Natu , W. Swenson , Jyoti Mazumder
发明人： Bhaskar Dutta , Harshad Natu , W. Swenson , Jyoti Mazumder
IPC分类号： B26D1/00
CPC分类号： B26D1/0006 , B26B9/00 , C23C24/106 , Y10T83/929
摘要： Direct metal deposition (DMD) is used to fabricate knife edges with extended service life. A metal alloy powder is deposited along a blank and melted with a laser beam so that the powder solidifies into a strip of material having a hardness and/or wear resistance greater than that of the starting material. The piece is then finished to produce a sharp edge in the solidified material. The powder may be melted while it is being deposited, or it may be melted after being deposited. A slot or groove may be formed in the blank with the metal alloy powder being deposited into the slot or groove. A hardened steel alloy powder is deposited onto a mild steel blank. For example, a tool steel or vanadium steel powder may be deposited onto a 1018 steel blank. An invention line-beam nozzle may be used for deposition and/or powder melting.
摘要翻译： 直接金属沉积（DMD）用于制造延长使用寿命的刀刃。 金属合金粉末沿着坯料沉积并用激光束熔化，使得粉末固化成具有比起始材料的硬度和/或耐磨性大的硬度和/或耐磨性的材料条。 然后将该片完成以在固化材料中产生锋利的边缘。 粉末在沉积时可能会熔化，或者沉积后可能会熔化。 可以在坯料中形成槽或槽，其中金属合金粉末沉积到槽或槽中。 将硬化的钢合金粉末沉积在低碳钢坯料上。 例如，可以将工具钢或钒钢粉末沉积到1018钢坯上。 发明的线束喷嘴可用于沉积和/或粉末熔化。
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9.发明申请公开(公告)号：US20100325902A1
公开(公告)日：2010-12-30
申请号：US12732794
申请日：2010-03-26
申请人： Bhaskar Dutta , Harshad Natu , W. Swenson , Jyoti Mazumder
发明人： Bhaskar Dutta , Harshad Natu , W. Swenson , Jyoti Mazumder
CPC分类号： B26D1/0006 , B26B9/00 , C23C24/106 , Y10T83/929
摘要： Direct metal deposition (DMD) is used to fabricate knife edges with extended service life. A metal alloy powder is deposited along a blank and melted with a laser beam so that the powder solidifies into a strip of material having a hardness and/or wear resistance greater than that of the starting material. The piece is then finished to produce a sharp edge in the solidified material. The powder may be melted while it is being deposited, or it may be melted after being deposited. A slot or groove may be formed in the blank with the metal alloy powder being deposited into the slot or groove. A hardened steel alloy powder is deposited onto a mild steel blank. For example, a tool steel or vanadium steel powder may be deposited onto a 1018 steel blank. An invention line-beam nozzle may be used for deposition and/or powder melting.
摘要翻译： 直接金属沉积（DMD）用于制造延长使用寿命的刀刃。 金属合金粉末沿着坯料沉积并用激光束熔化，使得粉末固化成具有比起始材料的硬度和/或耐磨性大的硬度和/或耐磨性的材料条。 然后将该片完成以在固化材料中产生锋利的边缘。 粉末在沉积时可能会熔化，或者沉积后可能会熔化。 可以在坯料中形成槽或槽，其中金属合金粉末沉积到槽或槽中。 将硬化的钢合金粉末沉积在低碳钢坯料上。 例如，可以将工具钢或钒钢粉末沉积到1018钢坯上。 发明的线束喷嘴可用于沉积和/或粉末熔化。
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公开(公告)号：US20100133247A1
公开(公告)日：2010-06-03
申请号：US12623249
申请日：2009-11-20
申请人： Jyoti Mazumder , Seung Hwan Lee
发明人： Jyoti Mazumder , Seung Hwan Lee
CPC分类号： B23K31/125 , B23K9/02 , B23K26/032 , B23K26/244 , B23K26/32 , B23K2101/006 , B23K2101/18 , B23K2101/34 , B23K2103/04 , B23K2103/08 , B23K2103/50
摘要： A method of monitoring a welding process, comprising detecting a selected portion of a light spectrum of plasma plume of a fusion welding process with a photo detector, processing the detected portion of the spectrum, comparing the detected portion of the spectrum with an expected spectra to determine whether a weld is acceptable, providing a signal to a welder control, and adjusting the weld process based on the signal.
摘要翻译： 一种监测焊接过程的方法，包括用光电检测器检测融合焊接过程的等离子体羽流的光谱的选定部分，处理所检测的光谱部分，将所检测的光谱部分与预期光谱进行比较， 确定焊接是否可接受，向焊工控制提供信号，以及根据信号调整焊接过程。
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