公开(公告)号：US20150001190A1

公开(公告)日：2015-01-01

申请号：US13927732

申请日：2013-06-26

申请人： Robert K. Cohen

发明人： Robert K. Cohen

IPC分类号： B23K11/25

CPC分类号： B23K11/253 ,  B23K11/255 ,  B23K11/257

摘要： A method of measuring weld thermal response as a function of time during the production of a resistance weld includes monitoring a first parameter responsive to a change in an electrode mechanical load on workpieces welded together with respect to the electrode mechanical load applied prior to application of the heat, monitoring a second parameter responsive to a change in position of linkage applying the electrode load with respect to linkage position prior to application of the heat, and processing a composite of the first parameter and the second parameter to produce a derived measurement representative of the thermal response of the weld. Electrode force and electrode current are also monitored via sensors and measurements calibrated to provide more accurate information during the welding process.

摘要翻译： 在电阻焊接生产期间测量作为时间的函数的焊接热响应的方法包括：监测第一参数，其响应于焊接在一起的工件上的电极机械载荷的变化相对于在施加之前施加的电极机械载荷 热量，响应于在施加热量之前相对于联动位置施加电极负载的位置变化而监测第二参数，以及处理第一参数和第二参数的复合物，以产生代表 焊缝的热响应。 电极力和电极电流也通过传感器和测量进行监测，校准后可以在焊接过程中提供更准确的信息。

公开(公告)号：US4803331A

公开(公告)日：1989-02-07

申请号：US7940

申请日：1987-01-28

申请人： Robert K. Cohen

发明人： Robert K. Cohen

IPC分类号： B23K11/25 ,  B23K11/24 ,  G05F1/70

CPC分类号： B23K11/252

摘要： A programmable power control and line voltage monitoring/compensation system for resistance spot welding machines of varying configurations provides maximum time for computer calculation of SCR triggering times and compensates in real time for these input power line fluctuations that affect the welding operation. The power control employs a single programmable delay element, the delay time of which is set while the delay is timing out to generate SCR trigger pulses. The commutation effect in three phase welding machine configurations is taken into account by the power control in determining trigger times. The line monitor synthesizes replica signals of both the primary voltage and current transmitted by the SCRs and processes these replica signals to provide various circuit parameters which can be used as feedback to compensate for only those line variations which affect the welding process.

摘要翻译： 用于不同配置的电阻点焊机的可编程功率控制和线路电压监测/补偿系统为计算机SCR触发时间的计算提供了最大的时间，并且对于影响焊接操作的输入电源线波动实时补偿。 功率控制采用单个可编程延迟元件，延迟时间设置在延迟超时以产生SCR触发脉冲。 在确定触发时间时，功率控制考虑了三相焊接机配置中的换向效应。 线路监视器合成由SCR传输的初级电压和电流的复制信号，并处理这些复制信号以提供各种电路参数，其可用作反馈以仅补偿影响焊接过程的那些线路变化。

公开(公告)号：US4742473A

公开(公告)日：1988-05-03

申请号：US755683

申请日：1985-07-16

申请人： Joel K. Shugar ,  Robert k. Cohen

发明人： Joel K. Shugar ,  Robert k. Cohen

IPC分类号： G06F3/033 ,  G06T17/20 ,  G09B7/04

CPC分类号： G06T17/20 ,  G06F3/033 ,  G06F3/04812 ,  G09B7/04

摘要： A Finite Element Analysis system having intelligent, interactive user interface features allows engineers without specialized knowledge in mathematical modeling to easily and interactively solve diverse problems. The system includes a digitizer tablet having a segmented work surface for entering pictorial data and for alternately selecting among processing modes from a menu. Alternate displays on a status screen are automatically correlated with the user positioning of a stylus on the digitizer tablet surface to provide the user with the information he needs for a particular contemplated action. A graphics screen displays a dumb cursor which tracks the position of the stylus in the graphics workspace of the digitizer tablet. An intelligent cursor automatically drawn on the graphics screen by a computer processor identifies a site of interest nearest the current location of the dumb cursor. The intelligent cursor anticipates the user's action in a selected mode and constrains these actions to valid operations within that mode.

摘要翻译： 具有智能交互式用户界面功能的有限元分析系统使得无需数学建模方面的专业知识的工程师能够轻松交互地解决各种问题。 该系统包括具有用于输入图形数据的分段工作表面并用于在菜单中的处理模式之间交替地选择的数字转换器图形输入板。 状态屏幕上的替代显示与数字转换器平板电脑表面上的触控笔的用户定位自动相关，以向用户提供他为特定预期动作所需的信息。 图形屏幕显示一个愚蠢的光标，其跟踪数字化仪平板电脑的图形工作空间中触控笔的位置。 由计算机处理器在图形屏幕上自动绘制的智能光标识别最接近哑光标的当前位置的感兴趣位置。 智能光标预期用户在所选模式下的动作，并将这些动作限制在该模式下的有效操作。

公开(公告)号：US4596917A

公开(公告)日：1986-06-24

申请号：US571233

申请日：1984-01-16

申请人： Herman A. Nied ,  Stanley J. Godwin ,  Robert K. Cohen ,  Robert V. Klint ,  Hsin-Pang Wang

发明人： Herman A. Nied ,  Stanley J. Godwin ,  Robert K. Cohen ,  Robert V. Klint ,  Hsin-Pang Wang

IPC分类号： B23K11/25 ,  B23K11/30 ,  B23K11/24

CPC分类号： B23K11/3009 ,  B23K11/252

摘要： A multivariable process monitor and method of monitoring a resistance spot welding process to yield instantaneous information on weld quality during the weld cycle. Sensors on the machine measure welding input variables and workpiece response variables and provide signals to a microcomputer system. A simplified analytical model of the spot welding process is incorporated in the microcomputer and is the reference for the weld quality logic that accepts or rejects the weld. Faulty welds are diagnosed and the reason displayed.

摘要翻译： 多变量过程监测和监测电阻点焊过程的方法，以在焊接周期内产生焊接质量的瞬时信息。 机器上的传感器测量焊接输入变量和工件响应变量，并向微机系统提供信号。 点焊过程的简化分析模型集成在微型计算机中，是接受或拒绝焊接的焊接质量逻辑的参考。 诊断错误的焊缝和显示的原因。

公开(公告)号：US4714913A

公开(公告)日：1987-12-22

申请号：US755473

申请日：1985-07-16

申请人： Robert K. Cohen

发明人： Robert K. Cohen

IPC分类号： H03M1/30

CPC分类号： H03M1/303

摘要： A signal processor converts quadrature phase signals, from an encoder, representative of a measured parameter, into data which is directly readable by a computer and representative of the magnitude and direction of the current value of the parameter. The signal processor decodes binary signals representative of successive samples of the quadrature phase signals into UP signals, DOWN signals, ERROR signals and NO CHANGE signals. The UP and DOWN signals are converted into corresponding pulse streams which drive an up-down counter. Range control circuitry facilitates extension of the measuring range of the processor beyond that of the counter. Error control circuitry provides an ERROR INTERRUPT signal to the computer when an illegal condition occurs and also preserves the last valid data occurring before the illegal condition. Change control circuitry advises the computer when a change in the parameter being measured is initiated and completed so that the computer can selectively sample processor output data only in response to changes in the measured parameter.

摘要翻译： 信号处理器将来自代表测量参数的编码器的正交相位信号转换为可由计算机直接读取并代表参数的当前值的大小和方向的数据。 信号处理器将表示正交相位信号的连续采样的二进制信号解码为UP信号，DOWN信号，ERROR信号和NO CHANGE信号。 UP和DOWN信号被转换成驱动上下计数器的相应脉冲流。 范围控制电路有助于将处理器的测量范围扩展到计数器的测量范围之外。 错误控制电路在发生非法情况时向计算机提供错误中断信号，并且还保留在非法状态之前发生的最后一个有效数据。 当正在测量的参数发生变化并完成时，变更控制电路会建议计算机，以便计算机只能根据测量参数的变化选择性地对处理器输出数据进行采样。

公开(公告)号：US4461944A

公开(公告)日：1984-07-24

申请号：US386152

申请日：1982-06-07

申请人： Robert K. Cohen

发明人： Robert K. Cohen

IPC分类号： G08C15/00 ,  G06F3/05 ,  H03M1/00 ,  B23K11/24

CPC分类号： G06F3/05 ,  H03M1/10 ,  H03M1/30

摘要： Data generated by an encoder with phase quadrature outputs, for instance a displacement transducer in a resistance spot welder control system, is read out of the interface to the computer in a format compatible with computer languages. The quadrature signals are converted to pulses representing positive and negative unit changes of displacement, and fed to an up-down counter which has signed two's complement values at its output. The most recent displacement data is read out while the counter continuously tracks the encoder.

摘要翻译： 由具有相位正交输出的编码器产生的数据，例如电阻点焊机控制系统中的位移传感器，以与计算机语言兼容的格式从计算机的接口读出。 正交信号被转换为表示位移的正和负单位变化的脉冲，并被馈送到在其输出处已经签名了二进制补码的升降计数器。 当计数器连续跟踪编码器时，读出最新的位移数据。

公开(公告)号：US09266187B2

公开(公告)日：2016-02-23

申请号：US13927732

申请日：2013-06-26

申请人： Robert K. Cohen

发明人： Robert K. Cohen

IPC分类号： B23K11/25

CPC分类号： B23K11/253 ,  B23K11/255 ,  B23K11/257

摘要： A method of measuring weld thermal response as a function of time during the production of a resistance weld includes monitoring a first parameter responsive to a change in an electrode mechanical load on workpieces welded together with respect to the electrode mechanical load applied prior to application of the heat, monitoring a second parameter responsive to a change in position of linkage applying the electrode load with respect to linkage position prior to application of the heat, and processing a composite of the first parameter and the second parameter to produce a derived measurement representative of the thermal response of the weld. Electrode force and electrode current are also monitored via sensors and measurements calibrated to provide more accurate information during the welding process.

摘要翻译： 在电阻焊接生产期间测量作为时间的函数的焊接热响应的方法包括：监测第一参数，其响应于焊接在一起的工件上的电极机械载荷的变化相对于在施加之前施加的电极机械载荷 热量，响应于在施加热量之前相对于联动位置施加电极负载的位置变化而监测第二参数，以及处理第一参数和第二参数的复合物，以产生代表 焊缝的热响应。 电极力和电极电流也通过传感器和测量进行监测，校准后可以在焊接过程中提供更准确的信息。

公开(公告)号：US4447700A

公开(公告)日：1984-05-08

申请号：US386153

申请日：1982-06-07

申请人： Robert K. Cohen

发明人： Robert K. Cohen

IPC分类号： B23K11/24 ,  B23K11/25

CPC分类号： B23K11/252

摘要： The adaptive controller for a resistance spot welder is implemented with a microcomputer and peripherals to handle the monitoring of several process variable inputs and control the welding machine in real time. Before welding power is applied, electrode load, workpiece thickness and dynamic resistance are measured and must fall within predefined limits in order to continue. The workpiece, if necessary, is conditioned to correct fit-up and surface contamination problems by applying power pulses to lower its resistance. The welding power in each half cycle is dynamically adjusted as a function of workpiece thermal expansion and its first derivative to control formation of the weld nugget, and to control the cooling rate and temper the workpiece. During welding the power limits are adjusted in real time to compensate for electrode flattening and shunt effects. The quality of each weld is diagnosed and machine diagnostics are performed.

摘要翻译： 用于电阻点焊机的自适应控制器由微型计算机和外围设备实现，用于处理多个过程变量输入的监控并实时控制焊机。 在焊接电源之前，测量电极负载，工件厚度和动态电阻，并且必须落在预定义的限制内才能继续。 如果需要，工件被调节以通过施加功率脉冲来降低其阻力来校正装配和表面污染问题。 根据工件热膨胀及其一阶导数动态调整每个半周期的焊接功率，以控制焊点的形成，并控制冷却速度并回火工件。 在焊接期间，实时调整功率限制，以补偿电极扁平化和分流效应。 诊断每个焊缝的质量，并执行机器诊断。