ISO 20168:2016 download free

06-26-2021 comment

ISO 20168:2016 download free.Resistance welding-Locking taper for electrode holders and electrode caps.
1 Scope
ISO 20168 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 requirenwnts of ISO 20168. 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 caps
3 Terms and definitions
For the purposes of ISO 20168, the terms and definitions given in ISO 17677-1 and the following apply.
ISO and IEC maintain Lerminological databases for use in standardization at the following addresses:
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
Now 1 to entry: See Eigur1.
Note 2 to entry: Traditionally called Fisher tapers.
Note 3 to entry: During welding, the electrode cap tightens further on the electrode holder.
4 Dimensions and tolerances
4.1 General
Table 1 gives the dimensions br three typically used electrode cap and holder sizes: 13 mm, 16 mm and 20 mm.
The taper angles of electrode caps and holders are to be verified by the use of certified ring gauges and plugs.
4.2 Electrode holders
The taper of the electrode holders shall be 2° 58’ 54” in accordance with Figure 2.
4.3 Electrode caps
The taper of the electrode caps shall be 2° 56’ 53 in accordance with FigUIe2.
5 Designation
5.1 Electrode holders
Electrode holders shall be designated in accordance with ISO 20168 and nominal diameter, d1.
EXAMPLE A spot welding electrode holder, with nominal diameter 20 mm is designated as follows:
ISO 20168:2016-20
5.2 Electrode caps
Electrode caps shall be designated in accordance with Iso 5821. except the number of ISO 20168shall be used to indicate that the cap has a locking taper.
EXAMPLE A spot welding electrode cap type HO. width d = 16 mm, length 1 = 20 mm,d2 = 8 mm and a = 450, is designated as follows:
ISO 20168:2016-BO – 16-20-8-45
6 Material
The materials used shall be in accordance with ISO S182.
7 Marking
The packaging shall be marked with the full designation and material used.

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