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ISO 669:2000 pdf free

ISO 669:2000 pdf free.Resistance welding – Resistance welding equipment – Mechanical and electrical requirements
ISO 669 applies to resistance welding equipment, to guns with inbuilt transformers and to complete movable welding equipment.
The fllowing types are included:
-single-phase equipment with alternating welding current;
-single- phase equipment with rectified welding current by rectification of the output of the welding transformer;
-single-phase equipment with inverter welding transformer;
-three-phase equipment with rectified welding current by rectification of the output of the welding transformer;
-three-phase equipment with a current rectification in the input of the welding transformer (sometimes called frequency convertor);
-three-phase equipment with inverter welding transformers.
ISO 669 applies neither to welding transformers sold separately nor to safety requirements.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of ISO 669. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 865:1981, Slots in platens for projection welding machines.
ISO 5183-1:1998, Resistance welding equipment一Electrode adaptors, male taper 1:10一Part 1: Conical fixing, taper 1:10.
ISO 5183-2:1988, Resistance spot welding一Electrode adaptors, male taper 1:10一Part 2: Parallel shank fixing for end-thrust electrodes.
ISO 5184:1979, Straight resistance spot welding electrodes.
physical displacement of electrodes during process function
NOTE 1 When the electrode is attached to the driving cylinder, the stroke of both the electrode and the driving cylinder, is equal.
NOTE 2 When the moving electrode is attached to a hinged lever moved by a driving cylinder, the maximum stroke of the electrode, by convention, equals the length of the chord of the arc generated by the tip of the moving electrode for the full stroke of the driving cylinder.
NOTE3 The stroke of the electrode may be composed of a “work clearance stroke” without any contact, facilitating the introduction of the workpiece between the electrodes and a smaller “working stroke”.ISO 669 pdf download.

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