Tungsten Copper Spot Welding Needle

Tungsten copper spot welding needle has many advantages, such as small in volume, excellent electrical and thermal conductivity, high welding stability, good anti-adhesion and no bombing fire, etc., in the micro-battery spot welding field has broad application prospects.

Types

Tungsten Copper Spot Welding Needle Picture

According to the differences of the shapes and structures, tungsten copper spot welding needle can be specifically divided into single head center solder pins, solder pins single eccentric head, double-headed center solder pin, eccentric stud welding spot welding needle, insert needle and so on. Common micro spot welding batteries includes laptop battery, cell phone battery, walkie-talkie battery, difital camera battery, button battery, lithium battery, nickel hydride nikel-cadmium battery, etc., the specific selection should be considered with the structure and the properties of the products.

Notice

1. Before spot welding, it should be ensured that the welding needle and the surface welded at the same level;

2. Before spot welding, it should be checked if the welding needle has been oxided of burned and use sandpaper or a sanding belt to smooth surface until the surface is smooth and no oxides;

3. The same spot welding joints can not be welded twice, and to ensure that the positive and negative electrodes have four effective solder joints;

4. There is no bombing fire and over-burnt phenomenon.

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Tungsten Copper Spot Welding Electrode

Tungsten copper spot welding electrode plays an important role in ensuring the quality of spot welding, which includes conductivity, transfer the pressure and rapidly scatter the heat in the welding area.

Advantages

1. High machining accuracy, the small area of the welding sharp;

2. Low voltage required, high-performance welding and good welding stability;

3. High torsional strength can effectively ensure the quality and precision of processing;

4. Small welding seam, good consistency and not easily to be pseudo soldered.

Process

Tungsten Copper Spot Welding Electrode Picture

1. Special conditions for improving the contacted resistance and heat dissipation, capacitor discharge welder using large current and short energizing time can be relatively large weld the workpiece large in thickness;

2. Use electrode with different diameter and the small one used in the thin plate or the one with good performance in electrical and thermal conductivity in order to increase the current density and reduce the effect of electrode heat dissipation this side;

3. Use different electrode materials or conductive sheets, one side of the workpiece with good thermal conductivity is poor heat conductivity of copper alloy, to reduce heat loss that side;

4. Use gasket (poor performance in thermal conductivity, thickness is between 0.2-0.3mm) to reduce the heat on this side.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Tungsten Copper Vacuum Contacts

Tungsten Copper Vacuum Contacts Picture

Tungsten copper vacuum contacts are used in the vacuum arc-quenching chambers (VACs) of highly dependable, quick-acting vacuum circuit breakers capable of breaking large currents in high-voltage 6-35 kW electrical networks. Tungsten copper vacuum contact is a key element in commutation switches (circuit breakers). Currently, the most common material used in contact pairs in VACs are W-(50-90%)Cu composites.

Tungsten copper vacuum contacts are subjected to the effects of short-circuits currents and fusing metals in various points of the surface due to the high density of the current in them; as a result, welding joints form in these zones. This problem was one reason that delayed the development of vacuum commutation technology for more than twenty years. The resistance of a VAC's contacts to welding is one of its key characteristics. The problem of welding was solved by developing special contact plates made from tungsten copper composites, which provided a high breaking capacity for circuit breakers in commutation networks, wear-resistance and resistance of contact pairs to welding.

Tungsten copper vacuum contacts are used in VACs of vacuum contactors with a nominal voltage of 1.14 kW and higher in systems for remote control of electric drivers. Tungsten copper vacuum contacts are a long-lasting means of switching contactors in electric circuits on and off and ensure a low cut-off current in the system.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Tungsten Copper Laser Heat Sink

Tungsten Copper Heat Sink Picture

Tungsten copper laser heat sink is an integrated circuit chip having a certain function is placed in a container with suitable housing, the chip to provide a stable working environment, protect the chip from less affected by the external environment, so that an integrated circuit having a stable normal function. At the same time the heat sink is chip-chip output, input connecting means outwardly transition, together with the chip to form a complete whole. The heat sink sheet material is required to have a certain degree of mechanical strength, good electrical properties, thermal properties and chemical stability, and according to different categories of integrated circuits and the use of premises, the choice of different package structures and materials.

Tungsten copper laser heat sink combines the advantages of tungsten and copper, both having low expansion characteristics of tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and thermal conductivity can be varied by adjusting the tungsten copper component, while and coefficient of thermal expansion of silicon, gallium arsenide, and ceramic material matches.

Any feedback or inquiry of tungsten copper alloy products please feel free to contact us:

Email: sales@chinatungsten.com

Tel.: +86 592 512 9696 ; +86 592 512 9595

Fax.: +86 592 512 9797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.