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7543732 |
Evaluation method and evaluation apparatus for spot welded portion
A technique for evaluation of the strength of a spot welded portion of a panel is provided. A stress value at the welded portion of the panel is calculated by a stress analysis according to a FEM...
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7432466 |
Method of electrical resistance spot welding
A method of resistance welding comprising the steps of contacting a metal sheet with an electrode having an initial contact surface area at a force to provide a pressure to the metal sheet applying...
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7291803 |
Method and device to obtain information to evaluate the quality of a resistance welding connection and/or to control or regulate a resistance welding method
Method and device for obtaining information to evaluate the quality of a resistance welding connection and/or to control or regulate a resistance welding method. Method and device include...
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7282663 |
Forge welding process
An automated method for forge welding tubulars including heating the tubular ends to be joined in a welding chamber while the heated tubular ends are maintained aligned and parallel relative to...
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7259349 |
Method for monitoring the quality of spot welding
A method for monitoring the quality of spot welding, in particular for robotic applications. Workpieces, such as metal sheets are welded together using spot welding tools. The sheets are placed...
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7253632 |
Method for qualifying joints and contacts of electric circuits
In a method for qualifying an electric circuit having at least one contact, a reference function of thermoelectric voltage versus time of a faultless electric circuit is provided. The circuit is...
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7247810 |
Module for resistance welding tongs
The invention originates in the field of resistance welding technology, among other means by means of welding robots 1 , for use in roll seam welding, projection welding or spot welding, and has...
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7145097 |
Method and apparatus for electrical resistance spot welding using electrical servo actuator
The present invention provides a servo driven spot welder where an electric servo actuator moves at least one of two electrodes to and away from the workpiece. The servo driven spot welder includes...
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7127438 |
Method of regulating and controlling a technical process such as spot-welding of metal sheets
A method for controlling and driving a technical process executed in time by applying at each time t instructions Ci(t), leading to a measurable but not observable result R(t) and generating a...
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7039500 |
Multiple arm robot arrangement
An improved robot arrangement for performing predetermined tasks, such as paint finishing, features equipping a robot with a plurality of manipulatable arms, with at least two of the arms...
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6920371 |
Welding system and methodology providing multiplexed cell control interface
The present invention provides a welding system and methodology to facilitate communications and control. The system includes a cell controller to control one or more welders over a control...
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6906276 |
Resistance spot welding control device and method
The invention relates to a control device for spot welding with a welding electrode pincer (Z), the welding electrodes (E 1 , E 2 ) of which are connect to a welding current generator (IS) and an...
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6907318 |
Multi-station robotic welding assembly
A multi-station robotic welding assembly includes a mounting platform, and a plurality of robots attached to the mounting platform and located in respective weld stations. Each of the robots...
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6903298 |
Resistance welding control method
This invention provides a method of producing a series of substantially uniform spot welds between two metal parts using a servomotor driven movable electrode and an axially opposing fixed...
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6813538 |
Welding system
A welding system is capable of shortening length of connection lines and of effectively utilizing devices as a whole. The system includes a welding controller provided with an I/O interface, a...
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6795778 |
System and method for facilitating welding system diagnostics
A system and method for facilitating welding system diagnostics is provided. The invention includes a welder, a local system, a remote system, and/or an alarm component. The invention further...
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6737603 |
SW micro welder for directly welding enameled wires
This invention deals with a spot electrical welding machine which is technically applied to the electronics industry and micro-electronic industry. A spot electrical welder optimally directly welds...
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6728602 |
Control system for an electric heater
A control system for an electric heater, e.g., an electric catalyst heater (ECH), includes a current sensor, a voltage sensor, a switching element, and a control circuit. The control circuit is...
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6671952 |
Method of lead wire connection
A method of lead wire connection includes mounting a lead wire onto an uppre surface of a land portion, supplying a cover member onto the lead wire, pressing the lead wire via the cover member...
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6633016 |
Resistance welding method
In a resistance welding method using direct current in which a direct voltage that is applied to the welding electrodes is commutated. According to the invention, the polarity of the direct voltage...
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6627841 |
Method for designing a weld fixture based on predicted stresses and distortions
A method for designing a weld fixture. The method includes modeling a set of distortions produced by applied mechanical forces on a material to be welded, modeling a set of distortions produced by...
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6624379 |
Method and apparatus for welding a metal fastener to a metal member
A method and apparatus for projection welding a metal fastener (e.g., a nut) to a metal member (e.g., a sheet) is disclosed. The apparatus includes a first electrical contact and a locator assembly...
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6609033 |
Field programmable welding controller
Welding controller 1 has CPU 1 a , ROM 1 1 b , ROM 2 1 c and RAM 1 d . Programs and data are written into the ROM 1 1 b and can be rewritten. Sequential welding data is written into the RAM 1...
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6586701 |
Resistance welding method and device
The invention relates to a resistance welding method, especially for the resistance welding of aluminum sheets. According to the inventive method, a direct voltage which is applied to welding...
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6545243 |
Dynamic weld power termination for hot-staking armature commutators
The method of the present invention involves setting a penetration threshold as well as a maximum weld time when hot staking armature conductors to the slots of a commutator. To perform each weld,...
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6518536 |
Joining equipment
A joining equipment in which a neural network is employed for controlling a joining process. A dynamic analog model is used for neuron elements configuring the network. The equipment includes a...
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6515251 |
Welding system and method
A method of resistance spot welding is disclosed. The method includes providing a first metallic workpiece having a primary surface and a second metallic workpiece having a secondary surface. The...
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6506997 |
Spot welding system and method for sensing welding conditions in real time
Methods and apparatus are provided for monitoring resistance spot welding process conditions in real time by using welding data in an energy balance model in integral form to estimate the mean weld...
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6459065 |
Resistance welding power supply apparatus
Disclosed is a resistance welding power supply apparatus which comprises a large-capacitance capacitor for storing resistance welding energy in the form of electric charges, a charging circuit for...
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6444942 |
Welding control systems
A single teaching apparatus may be provided for all welding control apparatus in a welding control apparatus in order to input the welding sequence data. The internal address of a welding control...
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6423950 |
Reflow soldering apparatus
This reflow soldering apparatus comprises a heater tip 10 for soldering sites to be soldered of a workpiece W by reflow method, a power supply unit for supplying an electric power for heat...
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6414259 |
Inter-welding electrode moving amount detecting method and apparatus thereof
An inter-welding electrode moving amount detecting method includes the below steps: moving a driving section of electrode driving means having the driving section connected to at least one of a...
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RE37607 |
Resistance projection welding system and method for welding a fastener element to a workpiece
A system and method is disclosed for monitoring and controlling a resistance projection welder for welding a projection weld nut to a workpiece. A displacement sensor measures the displacement of a...
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6359566 |
Welding machines
Resistance welding machines may include one or more temperature sensors that measure the temperatures of one or more heat generating elements within the welding machine, such as the welding...
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6337458 |
Method for automatically selecting the welding sequence for manual welding electrode holders; manual welding electrode holder for implementing the method
The electrode holder comprises a body 1 suspended by an articulated link 9, 13, 14 from a sling 6, this articulated link comprising a pivot collar 13 in which the body can rotate around a...
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6326580 |
Joining apparatus
After the initiation of a first current-supplying time an insulator of a coated wired W 1 cuts off an electrically conductive path and hence a secondary current I 2 for melting and removing the...
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6321167 |
Resistance-welding power supply apparatus
Disclosed is a resistance-welding power supply apparatus comprising a large-capacitance capacitor for storing a welding energy in the form of electric charge, a charging unit for charging the...
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6294753 |
Resistance welding machine control method
A resistor welding machine control method for calculating a temperature distribution at a portion to be welded by using changes in welding current and voltage across two welding electrodes during...
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6252211 |
Method of joining metal pieces
A method and apparatus for joining metal pieces wherein the rear end of a preceding metal piece and a front end of a metal piece are heated and then pressed together prior to hot finished rolling....
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6232572 |
Spot welding control system and control method
Paired electrodes, of which a wear amount is detected, press workpieces to be welded, conducting a current therethrough, and have an inter-electrode displacement amount varying during the current...
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6218638 |
Method for inspecting the quality in resistance welding
A method for inspecting the quality of the resistance weld, in which the adhesive force between twisted wires, as materials to be welded in a welding portion, can be predicted on the basis of the...
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6160235 |
Measurement of welds
Resistance welds on overlapped sheets of metal, such as the welded side seam of 3 piece cans, are monitored by measuring the width of the extrusion (5, 6) formed by material flowing out from the...
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6153848 |
Welding quality decision apparatus and welding machine provided with the same
A welding quality decision apparatus having a high precision and a welding machine provided with the apparatus are provided. The welding quality decision apparatus according to the present...
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6140825 |
Method and apparatus for evaluating quality of resistance welds
A method for evaluating quality of a resistance weld is provided, in which a nugget generation state during a welding process is evaluated by observable numerical values based on physical...
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6137077 |
Inverter resistance welding control apparatus
When a second switching element Q 2 is changed over from ON state to OFF state for each switching cycle while a first switching element Q 1 remains ON in a unit weld period T a for example, a...
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6130396 |
Electric resistance welding system
A predetermined value is used for adjusting welding power to an optimum value to consistently achieve sturdy welds. The predetermined value is not affected by variations in workpiece materials and...
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6118095 |
Control device for resistance welder
In a resistance spot welder in which an operation of pressurizing an electrode is conducted by an electric servo motor, an amount of thermal expansion due to production of a weld nugget is detected...
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6087613 |
Process monitor for a weld controller
A weld controller maintains an internal dynamic model of load impedance, which tracks normal impedance variations that occur as the weld tooling degrades. The weld controller contains a weld...
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6072145 |
Spot welding apparatus and a method for controlling the apparatus
A spot welding apparatus having a pressing axis to which a mechanical impedance control device is provided. The mechanical impedance control device includes a welding condition instruction device,...
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6072146 |
Resistance welding gun with on-board memory
A resistance welding device having a welding current source, a control and/or regulating device for regulating the welding current, and at least one set of interchangeable welding guns on which...
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