专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4001540A Welding monitoring and control system 失效
标题翻译：焊接监控与控制系统
公开(公告)号：US4001540A
公开(公告)日：1977-01-04
申请号：US534341
申请日：1974-12-18
申请人： Charles J. Drake , John F. Farrow
发明人： Charles J. Drake , John F. Farrow
IPC分类号： B23K11/25 , B23K11/24
CPC分类号： B23K11/252
摘要： A monitoring and control system for use in conjunction with a pulsation type welder which utilizes a computer to calculate the impedance characteristics of a weld and compare these characteristics to a preselected set of characteristics to determine if a quality weld has been made. The system then controls the heat and cool time to increase or decrease the temperature of the weld and thus control the size of the weld nugget. The monitoring control system is utilized in conjunction with a standard pulsation welding control system, which standard system provides a series of heat impulses each followed by a cool interval, this cycle being repeated for a preselected number of cycles. The monitoring and control system senses the voltage and current in the welding load and feeds this data to a computer which, in turn, calculates the impedance of the weld. This calculation is then compared to a predetermined set of standards which are evolved as a result of processing a preselected number of previous welds, and corrections are made to assure the weld quality. If the weld is not developing sufficiently, the number of cycles in the cool portion of the impulse, and thus, the cool time, is reduced until the weld meets the set standards. On the other hand, if the weld exceeds the standard, the number of heat cycles, and thus the heat time, is reduced.

2. 发明授权

US4804819A Structure and method for resistance welding with an inductively coupled power source 失效
标题翻译：用电感耦合电源进行电阻焊接的结构和方法
公开(公告)号：US4804819A
公开(公告)日：1989-02-14
申请号：US938977
申请日：1986-12-08
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： B23K11/00 , B23K11/06 , B23K11/11 , B23K13/01 , B23K13/04
CPC分类号： B23K13/04 , B23K11/06 , B23K11/11
摘要： Structure for and a method of resistance welding using an induction coupled power source. The structure of the invention comprises an electric coil wrapped around a flux concentrating core in close proximity to members to be welded together, a source of alternating electrical energy connected through the coil and means for applying pressure between the members to be welded. In accordance with the method of the invention the members to be welded are heated by at least one of an induced current and hysteresis loss and the heated members are then forged together by applying pressure thereon. The weld effected by the method of the invention may be either a spot weld or a continuous weld. Further in accordance with the structure of the invention the flux concentrating core may be on one or both sides of the materials to be welded and may be linear and perpendicular or at an angle to the members to be welded, or may be U-shaped or cup-shaped including a central post around which the coil is wrapped.
摘要翻译：使用感应耦合电源的电阻焊接结构和方法。本发明的结构包括一个电磁线圈，其缠绕在紧靠待焊接在一起的构件上的集流芯上，通过线圈连接的交流电能源和用于在被焊接件之间施加压力的装置。根据本发明的方法，待焊接的构件通过感应电流和磁滞损耗中的至少一个被加热，然后通过在其上施加压力将被加热构件锻造在一起。通过本发明的方法实现的焊缝可以是点焊或连续焊接。此外，根据本发明的结构，助焊剂浓缩芯可以在待焊接的材料的一侧或两侧上，并且可以是与待焊接的构件线性和垂直或成一定角度，或者可以是U形或杯状，包括中心柱，线圈缠绕在该中心柱上。

3. 发明授权

US4885451A Automatic stepper for resistance welding 失效
标题翻译：自动步进电阻焊接
公开(公告)号：US4885451A
公开(公告)日：1989-12-05
申请号：US192001
申请日：1988-05-09
申请人： John F. Farrow , David W. Schulz
发明人： John F. Farrow , David W. Schulz
IPC分类号： B23K11/25
CPC分类号： B23K11/252
摘要： A method is disclosed for controlling the magnitude of current delivered through welding electrodes to a workpiece to be welded using resistance welding techniques, in order to prevent weld expulsion and concomitant diminishment of weld quality. Weld expulsion is detected by determining changes in resistance during formation of the weld, by periodically determining the power factor, and the primary circuit of the welding transformer. The power factor is determined by determining the relative timing between the commencement of the applied voltage, the zero crossover point of the applied voltage, and the ensuing zero point of the applied current.
摘要翻译：公开了一种用于通过电阻焊接技术控制通过焊接电极传递到待焊接工件的电流的大小的方法，以便防止焊接排出和伴随的焊接质量的降低。通过确定焊接形成期间的电阻变化，通过周期性地确定功率因数和焊接变压器的初级回路来检测焊接排出。通过确定所施加的电压的开始与施加的电压的零交叉点与所施加的电流的随后的零点之间的相对定时来确定功率因数。

4. 发明授权

US4513363A Structure for and method of reducing impedance in multiphase direct current power supplies 失效
标题翻译：降低多相直流电源阻抗的结构和方法
公开(公告)号：US4513363A
公开(公告)日：1985-04-23
申请号：US350987
申请日：1982-02-22
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： H02M7/06 , H02M7/08
CPC分类号： H02M7/068 , H02M7/08
摘要： Structure for and method of eliminating impedance in multiphase direct current power supplies comprising connecting transformer primary windings in Y configuration with contactor structure, whereby multiple impedance paths through transformer secondary circuits are provided.
摘要翻译：消除多相直流电源中的阻抗的结构和方法，其包括将具有接触器结构的Y配置的变压器初级绕组连接，由此提供通过变压器次级电路的多个阻抗路径。

5. 发明授权

US06225590B1 Method for determining a condition of a resistance spotwelding system or a workpiece in the system 有权
标题翻译：用于确定系统中电阻点焊系统或工件的状态的方法
公开(公告)号：US06225590B1
公开(公告)日：2001-05-01
申请号：US09318307
申请日：1999-05-25
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： B23K1111
CPC分类号： B23K11/257 , B23K11/252 , B23K11/253 , B23K11/255 , B23K11/311
摘要： This invention relates to methods to control the resistance spotwelding process using an electric servomotor actuator to move the welding electrodes to the work and apply force to them. Measurements of actuator position, servomotor drive voltage, servomotor drive current, voltage across the welding electrodes, welding transformer primary current, welding transformer secondary current and power factor in the primary circuit of the welding transformer are used separately and in combination to determine various conditions such as identify defects in the welding machine, the electric cabling, the welding process and in the weld itself. Depending upon the defect found, the welding parameters are changed to overcome the defect, and/or the need for an additional weld is indicated and/or an error indication is generated.
摘要翻译：本发明涉及使用电动伺服电机致动器来控制焊接点焊工艺的方法，以将焊接电极移动到工件上并对其施加力。焊接变压器初级电路中的执行机构位置，伺服电机驱动电压，伺服电机驱动电流，焊接电极两端的电压，焊接变压器初级电流，焊接变压器次级电流和功率因数的测量分别使用并组合使用以确定各种条件识别焊接机器的缺陷，电缆，焊接过程和焊接本身。根据发现的缺陷，改变焊接参数以克服缺陷，和/或指示附加焊缝的需要和/或产生错误指示。

6. 发明授权

US5793243A Method of stabilizing an electronic signal integrator 失效
标题翻译：稳定电子信号积分器的方法
公开(公告)号：US5793243A
公开(公告)日：1998-08-11
申请号：US362807
申请日：1994-12-22
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： G06G7/186
CPC分类号： G06G7/186
摘要： A signal integrator stabilization circuit comprises an operational amplifier functioning as a comparator. The circuit further comprises an attenuator in the amplifier's feedback, thereby generating a feedback signal which is sampled to produce a sampling signal. The integrator is driven with a preselected ratio of the feedback signal and the sampling signal to produce a stabilized output signal approaching a zero value which has a good DC stability without compromising the ability to accurately integrate high frequency signals.
摘要翻译：信号积分器稳定电路包括用作比较器的运算放大器。电路还包括放大器反馈中的衰减器，由此产生被采样以产生采样信号的反馈信号。积分器以反馈信号和采样信号的预选比率驱动，以产生接近零值的稳定输出信号，该值具有良好的直流稳定性，而不会影响精确集成高频信号的能力。

7. 发明授权

US4831229A High frequency resistance spot welding structure and method 失效
标题翻译：高频电阻点焊结构及方法
公开(公告)号：US4831229A
公开(公告)日：1989-05-16
申请号：US938976
申请日：1986-12-08
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： A61J3/00 , B23K11/11 , B23K13/04
CPC分类号： B23K11/115 , B23K13/04 , A61J2200/74 , A61J3/002
摘要： High frequency resistance spot welding structure and method. In one embodiment, the structure includes dual, mirror image welding transformers, each including a transformer secondary circuit, an endless transformer core, and a transformer primary winding wound around the transformer core. The transformer secondary circuits may be single member, U-shaped transformer secondaries with integral electrode portions. In another embodiment, one of the transformers is replaced by a pair of spaced apart welding electrodes which are connected by a conductor. Means are provided for supplying welding pressure to the transformers to move them with their associated welding electrodes during a weld sequence. A high frequency, electrical welding signal is applied to the transformer primary circuits which are synchronized when two transformers are used so that the welding currents passing through the transformer secondary circuits reinforce each other. The structure is small and light weight so as to be inexpensive, positioned immediately adjacent a weld, and moved quickly. The method of the invention includes providing the high frequency welding signal to the mirror image, closely spaced apart welding structures, synchronizing the high frequency welding signal to provide push/pull welding and providing forging pressure through the transformers or transformer to move them with their associated electrodes during spot welding.
摘要翻译：高频电阻点焊结构及方法。在一个实施例中，该结构包括双镜像焊接变压器，每个变压器包括变压器次级电路，环形变压器铁芯和卷绕在变压器铁芯上的变压器初级绕组。变压器次级电路可以是单个构件，具有整体电极部分的U形变压器次级。在另一个实施例中，一个变压器由一对间隔开的焊接电极代替，焊接电极通过导体连接。提供了用于在焊接序列期间向变压器提供焊接压力以便与它们相关联的焊接电极移动它们的装置。高频电焊信号被施加到变压器初级电路，当使用两个变压器时同步的变压器，使得通过变压器二次回路的焊接电流相互加强。该结构体积小，重量轻，价格便宜，紧邻焊缝定位，并快速移动。本发明的方法包括将高频焊接信号提供给镜像，紧密间隔开的焊接结构，使高频焊接信号同步以提供推/拉焊接，并通过变压器或变压器提供锻压以使它们与其相关的点焊期间电极。

8. 发明授权

US4733045A Method of and structure for high speed resistance seam welding 失效
标题翻译：高速电阻缝焊方法及结构
公开(公告)号：US4733045A
公开(公告)日：1988-03-22
申请号：US938975
申请日：1986-12-08
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： B23K11/24
CPC分类号： B23K11/241
摘要： A method of and structure for high speed seam welding. The method comprises placing an auxiliary transformer between a three phase source of electrical welding energy and seam welder structure, which auxiliary transformer includes three separate primary windings connected to the separate phases of the source of welding energy, phase controlling the energizing of each separate primary winding and energizing the seam welder from the auxiliary transformer. In one embodiment, the phases of the auxiliary transformer are energized in the order of the phase of the welding energy and a delay of approximately 120.degree. of the welding energy is provided between the energizing of each auxiliary transformer winding. In another embodiment of the invention, the auxiliary transformer primary windings are energized in a first, third, second, welding energy phase order with a delay of 240.degree. of the welding energy between energizing each primary coil winding to provide a substantially 60/40, on/off auxiliary transformer energizing. The structure of the invention may include an auxiliary transformer secondary winding connected to the primary winding of a seam welder welding current transformer or a seam welder welding current transformer having a primary winding connected in parallel with one of the three primary windings of the auxiliary transformer or an auxiliary transformer including a secondary winding connected directly to the seam welder structure.
摘要翻译：高速缝焊的方法和结构。该方法包括将辅助变压器放置在三相电焊接能量源和缝焊机结构之间，该辅助变压器包括连接到焊接能源的单独相的三个独立的初级绕组，相位控制每个独立的初级绕组的通电并从辅助变压器通电缝焊机。在一个实施例中，辅助变压器的相位以焊接能量的相位的顺序被激励，并且在每个辅助变压器绕组的通电之间提供大约120°的焊接能量的延迟。在本发明的另一个实施例中，辅助变压器初级绕组在第一，第三，第二焊接能量相位阶段被激励，在激励每个初级线圈绕组之间具有240°的焊接能量的延迟，以提供基本上60/40，开/关辅助变压器通电。本发明的结构可以包括连接到缝焊机焊接电流互感器的初级绕组的辅助变压器次级绕组或具有与辅助变压器的三个初级绕组中的一个并联连接的初级绕组的缝焊机焊接电流互感器，或辅助变压器，其包括直接连接到缝焊机结构的次级绕组。

9. 发明授权

US06342686B1 Method for determining a condition of a resistance spotwelding system or a workpiece in the system 有权
标题翻译：用于确定系统中电阻点焊系统或工件的状态的方法
公开(公告)号：US06342686B1
公开(公告)日：2002-01-29
申请号：US09709891
申请日：2000-11-09
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： B23K1125
CPC分类号： B23K11/257 , B23K11/252 , B23K11/253 , B23K11/255 , B23K11/311
摘要： This invention relates to methods to control the resistance spotwelding process using an electric servomotor actuator to move the welding electrodes to the work and apply force to them. Measurements of actuator position, servomotor drive voltage, servomotor drive current, voltage across the welding electrodes, welding transformer primary current, welding transformer secondary current and power factor in the primary circuit of the welding transformer are used separately and in combination to determine various conditions such as identify defects in the welding machine, the electric cabling, the welding process and in the weld itself. Depending upon the defect found, the welding parameters are changed to overcome the defect, and/or the need for an additional weld is indicated and/or an error indication is generated.
摘要翻译：本发明涉及使用电动伺服电机致动器来控制焊接点焊工艺的方法，以将焊接电极移动到工件上并对其施加力。焊接变压器初级电路中的执行机构位置，伺服电机驱动电压，伺服电机驱动电流，焊接电极两端的电压，焊接变压器初级电流，焊接变压器次级电流和功率因数的测量分别使用并组合使用，以确定各种条件识别焊接机器的缺陷，电缆，焊接过程和焊接本身。根据发现的缺陷，改变焊接参数以克服缺陷，和/或指示附加焊缝的需要和/或产生错误指示。

10. 发明授权

US5757176A Method and system for controlling output current of a large, low-voltage, DC power supply and obtaining diagnostic information from the operation thereof 失效
标题翻译：用于控制大型，低压直流电源的输出电流并从其操作中获得诊断信息的方法和系统
公开(公告)号：US5757176A
公开(公告)日：1998-05-26
申请号：US784990
申请日：1997-01-17
申请人： John F. Farrow
发明人： John F. Farrow
IPC分类号： H02M7/155 , G05B24/02
CPC分类号： H02M7/1557
摘要： A method and system for controlling the output current of large, low-voltage, DC power supply which includes at least one transformer primary by controllably switching an AC power line voltage to the primary as a function of actual and desired output currents. SCRs are used to switch, using phase control, the AC primary voltage to the transformer(s) of the power supply in order to control the output current. Given the incoming power line voltage, the current value from the previous power line cycle and the desired current for the present cycle, the function is used to find the SCR firing angle to attain the desired output current in the present power line cycle. Actual measurements of output current and power line voltage are used to modify the function to reflect changes in power line voltage and/or circuit impedance to obtain a modified function. Preferably, instantaneous changes in power line voltage are measured and used to change the input variables to the function in order to provide instantaneous corrections for power line voltage changes. Diagnostic information concerning the operation of the DC power supply is determined from the modified function.
摘要翻译：一种用于控制大型，低压直流电源的输出电流的方法和系统，其包括至少一个变压器初级，通过可控地将AC电力线电压转换为主电压作为实际和期望的输出电流的函数。使用SCR来使用相位控制将AC一次电压切换到电源的变压器，以便控制输出电流。给定输入电源线电压，来自先前电力线周期的电流值和当前周期的期望电流，该功能用于找到SCR触发角以在当前电力线周期中获得期望的输出电流。输出电流和电源线电压的实际测量用于修改功能以反映电源线电压和/或电路阻抗的变化，以获得修改的功能。优选地，测量电力线电压的瞬时变化并用于将输入变量改变为功能，以便为电力线电压变化提供瞬时校正。关于直流电源的运行的诊断信息由修改后的功能决定。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式