Abstract:
본 발명은 다중 전류공급 및 다중 가압에 의한 전기저항 스폿용접기에 관한 것으로서, 본 발명에 따른 다중 전류공급 및 다중 가압에 의한 전기저항 스폿용접기는 사이에 중첩된 제 1 금속판재 및 제 2 금속판재가 위치하도록 하고, 상기 금속판재의 상하부에서 접촉하는 상부 스폿용접봉 및 하부 스폿용접봉을 포함하며 스폿용접을 수행하는 전기저항 스폿용접기에 있어서, 상기 상부 스폿용접봉 및 상기 하부 스폿용접봉은 각각 일단부에 제 1 전극팁이 형성된 봉 형태의 제 1 스폿용접봉 및 일단부에 제 2 전극팁이 형성되며 내부에 상기 제 1 스폿용접봉을 이격하도록 수용하는 봉 형태의 제 2 스폿용접봉을 포함하여 구성되고, 상기 제 1 스폿용접봉에 제 1 전류를 공급하는 제 1 전류공급부, 상기 제 2 스폿용접봉에 제 2 전류를 공급하는 제 2 전류공급부, 상기 제 1 스폿용접봉을 길이 방향으로 이송하면서 상기 중첩된 제 1 금속판재와 제 2 금속판재를 가압시키는 제 1 가압부 및 상기 제 2 스폿용접봉을 길이 방향으로 이송하면서 상기 중첩된 제 1 금속판재와 제 2 금속판재를 가압시키는 제 2 가압부를 포함하여 구성되는 것을 특징으로 한다.
Abstract:
This disclosure relates to weldability of steel alloys that provide weld joints which retain hardness values in a heat affected zone adjacent to a fusion zone and which also have improved resistance to liquid metal embrittlement due to the presence of zinc coatings.
Abstract:
The purpose of the present invention is to obtain nuggets of appropriate diameter, without the occurrence of scatter. The present invention provides a resistance spot welding device for joining of prescribed welded materials, wherein the device is provided with: a storage unit for storing, as target values, time variation of the amount of instantaneous heat generation per unit of volume and the amount of cumulative heat generation per unit of volume observed during test welding that precedes welding proper; and a welding pressure controller that, in the event that the amount of time variation of the amount of instantaneous heat generation per unit of volume during welding diverges from a time variation curve stored as target values, compensates for the difference within the remaining energization time, and adjusts the welding pressure to the welded materials and to an adaptive controller that controls the current value of the voltage value during energization, in such a way that the amount of cumulative heat generation per unit of volume during welding proper matches the amount of cumulative heat generation per unit of volume stored as target values.
Abstract:
The position of an operating device (2) with respect to a piece (P) is checked and corrected by associating to the operating device (2) a measuring device (5) carrying a plurality of sensors (505) located at given positions with respect to the operating device (2), the sensors (505) being adapted to measure, by means of a contactless technology, the distances of the sensors themselves from a surface (π) of the piece (P) along respective directions (l, r, s) having given orientations. The measurement values detected by said contactless sensors (505) are processed to obtain the value of at least one angle indicating the orientation of a main operative axis (X1) of the operating device (2) with respect to an operation axis (X2) defined by said surface (π) of the piece (P). The information obtained by means of said processing step is used for generating, if necessary, a signal for controlling said positioning apparatus (1) in order to position said operating device (2) according to a desired orientation with respect to the piece (P).
Abstract:
Die Erfindung betrifft ein Verfahren zum Widerstandsschweißen eines Sandwichblechs mit mindestens einem weiteren metallischen Bauteil, wobei das Sandwichblech zwei metallische Deckschichten und eine zwischen den metallischen Deckschichten angeordnete thermoplastische Kunststoffschicht aufweist, bei welchem der zu schweißende Bereich des Sandwichblechs derart erwärmt wird, dass die thermoplastische Kunststoffschicht aufweicht und durch Zusammendrücken der Deckschichten aus dem Schweißbereich verdrängt wird und die Deckschichten mit dem weiteren Bauteil durch einen elektrischen Stromfluss in einem ersten Stromkreis über eine erste, auf der Seite des Sandwichblechs angeordnete Schweißelektrode und eine zweite, auf der Seite des weiteren metallischen Bauteils angeordnete Schweißelektrode miteinander verschweißt werden. Die Aufgabe, ein Verfahren zum Widerstandsschweißen von Sandwichblechen, mit welchem kurze Zykluszeiten, ein kompakter Aufbau und eine prozesssichere Schweißverbindung erzielt werden kann, wird dadurch gelöst, dass der zu schweißende Bereich des Sandwichblechs durch einen Stromfluss in einem zweiten Stromkreis erwärmt wird, welcher die erste Schweißelektrode und einen zwischen der ersten Schweißelektrode und dem Sandwichblech angeordneten elektrischen Leiter umfasst. Darüber hinaus betrifft die Erfindung eine Vorrichtung zum Widerstandsschweißen.
Abstract:
A hat profile (11) has a tensile strength exceeding 1400 MPa and it has soft bands (20) with a tensile strength below 1100 MPa on its side flanges (15,16). The profile is welded to a cover (17) by single rows of weld dots (18). The side flanges have high strength zones (21,22) on both sides of the soft bands (20).
Abstract:
A portable system for non-destructively characterizing spot welds that includes at least one matrix phased array probe and a body, wherein the body is designed to be hand-held and further includes an economically designed outer casing; at least one input for connecting to the at least one matrix phased array probe; ultrasonic phased array transmitting and receiving circuitry in electrical communication with the at least one input; a touch screen computer that further includes at least one data processor running software that includes at least one imaging algorithm for processing data received from the probe and generating color coded ultrasonic C-scan images of characterized welds; and at least one monitor for displaying the color coded ultrasonic C-scan images of the characterized welds in real time.