Spot Welding

Spot welding is a resistance welding method used to join two to four overlapping metal sheets which are up to 3 mm thick each. In some applications with only two overlapping metal sheets, the sheet thickness can be up to 6 mm. Two copper electrodes are simultaneously used to clamp the metal sheets together and to pass current through the sheets. When the current is passed through the electrodes to the sheets, heat is generated due to the higher electrical resistance where the surfaces contact each other. As the heat dissipates into the work, the rising temperature causes a rising resistance, and the heat is then generated by the current through this resistance. The surface resistance lowers quickly, and the heat is soon generated only by the materials' resistance. The water cooled copper electrodes remove the surface heat quickly, since the copper is an excellent conductor. The heat in the center has nowhere to go, as the metal of the workpiece is a poor conductor of heat by comparison. The heat remains in the center, melting the metal from the center outward. As the heat dissipates throughout the workpiece in less than a second the molten, or at least plastic, state grows to meet the welding tips. When the current is stopped the copper tips cool the spot weld, causing the metal to solidify under pressure. Some coatings, such as zinc, cause localized heating due to its high resistance, and may require pulsation welding to dissipate the unwanted surface heat into the copper tips.

If excessive heat is applied, or applied too quickly, the molten area may extend to the outside, and with its high pressure (typically 30,000 psi) will escape the containment force of the tips with a burst of molten metal called expulsion. When this occurs, the metal will be thinner and have less strength than a weld with no expulsion. The common method of checking a weld is a peel test, technically called "coach peel", as expulsion weakens the material by thinning, and makes it pass the peel test easier. A better test is the tensile test, which is much more difficult to perform, and requires calibrated equipment.

Source : Wikipedia

Lowongan kerja Bank-2008 - Career

Bank UOB Buana is a well established exchange bank since 1956. In coming years, we will pursue aggressive growth and needs several qualified individuals to fill this position:

Relationship Manager ( Code : PRB - RM )

Location: Jakarta

RESPONSIBILITIES

1. To acquire new clients.
2. To meet annual target on revenue basis.
3. To monitor balance of clients transactions.

4. Deliver and maintain best service to clients professionally.
5. Execute, comply and maintain audit requirements and procedures.
6. To cross sell other banking products to clients.

QUALIFICATION

1. Male/ female
2. University degree from reputable universities, minimum bachelor degree (s1).
3. Fluent in English.
4. Minimum 1 year Banking experience.
5. Excellent communication skill, Client management, Engage with high-end profile of clients.
6. Strong Sales background in Consumer Banking Products, such as Investment, Treasury, and Bancassurance Products.
7. Holding WAPERD and AAJI is an advantage.
8. Have own vehicle.

Please send the CV and current photograph to:

louistanumihardja@uobbuana.com

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