BS ISO 20168:2016 pdf free.Resistance welding一Locking tapers for electrode holders and electrode caps. This document specifies the dimensions and tolerances for electrode holders and of spot welding electrode caps, where a locking taper is used. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5182, Resistance welding — Materials for electrodes and ancillary equipment ISO 5821, Resistance welding — Spot welding electrode cops 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 17677-1 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — I EC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp 3.1 locking taper taper allowing for a tight fit between an electrode holder and the electrode cap as their taper angles differ by 00 2’ 60”, ensuring the electrode cap engagement point is at the skirt of the cap and electrode holder Note 1…

ISO 669-2016 pdf free.Resistance welding一Resistance welding equipment一Mechanical and electrical requirements. ISO 669 defines and specifies certain identified electrical and mechanical characteristics of equipment used for resistance spot welding, projection welding, resistance seam welding, upset welding, and flash welding. This International Standard specifies the information to be given in equipment specifications and the test methods to be used for measuring those characteristics. Not all requirements apply to all types of equipment. The following types of power sources are included: 一一single phase with alternating welding current; single phase with rectified welding current by rectification of the output of the welding transformer; -single phase with inverter welding transformer; three phase with rectified welding current by rectification of the output of the welding transformer; -three phase with a current rectification in the input of the welding transformer (sometimes called frequency convertor); ， three phase with inverter welding transformers. This International Standard does not apply to welding transformers that are separate from the equipment. NOTE Safety requirements for resistance welding equipment are covered by IEC 62135-1. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition…