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#AUTOMATIC TIMER CONTROLS MANUAL#

Welding control is performed through statistical analysis of the data in order to detect questionable trends. The second meaning refers to the collection of data obtained after testing and inspecting several production runs. If the required correction is excessive, beyond the scope of action of the equipment, the system either sounds an alarm, to alert the operator to intervene, or stops automatically all operations before much damage is done. They are usually based on electronic instruments and sensors coordinated by suitable microprocessor technology. The first applies to those Welding control systems designed to maintain an automatic operation working within a preset range of parameters in order to ensure repetitive good welding results. Welding control as used here is intended as meaning two different things, both having influence on the outcome of a welding operation. These are documented Load Tests with an actual load, established by relevant codes, exceeding by a definite percentage the nominal rated capacity of the structure.

INSPECTION is carried out after welding operations once the manufactured items are completed.Ī special case is that, implemented sometimes for spot welds, where a load test is performed on actual welds, with a force just capable of opening up defective welds but insufficient to damage good welds.Ĭertification Tests are performed on completed constructions like hoisting devices, bridges or pressure vessels.

TESTING, usually destructive, is performed on a test-piece before starting production runs and at regular intervals thereafter, and.

#AUTOMATIC TIMER CONTROLS MANUAL#

Welding control is applied before and during welding (and may be manual or automatic),.Of the different levels of quality checks devised for ensuring acceptable production results:

Welding-control is one of the means employed to obtain successful welds.