ISO 18594:2007 PDF

Name: ISO 18594:2007 — Resistance spot-, projection- and seam-welding — Method for determining the transition resistance on aluminium and steel material
SKU: ISO 18594:2007
Price: 25 EUR
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Resistance spot-, projection- and seam-welding — Method for determining the transition resistance on aluminium and steel material

Название (английский):

ISO 18594:2007

Resistance spot-, projection- and seam-welding — Method for determining the transition resistance on aluminium and steel material

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 13 февраля 2007 г.
Издание:: ISO IS 18594 edition 1 version 1
ICS:: 25.160.10

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Описание (английский):

ISO 18594:2007 specifies the procedure and the experimental set-up for determining the transition resistance of a single sheet or two overlapping sheets of aluminium or steel, with or without surface treatment, and with or without surface coating.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 18594:2007 specifies a standardized laboratory method to determine the transition resistance in resistance spot-, projection- and seam-welding for aluminium and steel. The standard defines the experimental set‑up, measurement procedure and reporting requirements for single sheets or two overlapping sheets - with or without surface treatment or coating - to quantify electrical contact and bulk resistances relevant to resistance-welding quality and process development.

Key topics and technical requirements

Measurement principle: Total resistance is measured between sensing clamps and converted to resistance by Ohm’s law (R = U / I). Transition resistance Rt = total resistance − set‑up resistance.

Set‑up resistance: Measured with electrodes in direct contact (no specimen). Mean of measurements before and after each test series compensates for pick‑up on electrode faces.

Test specimens and sampling: Minimum seven measurements per specimen location; recommended at least five specimens from different positions to capture variability. Measurement points must be ≥15 mm from centre-to-centre and from specimen edges.

Timing & sequence: Apply electrode force, energize d.c. current and measure voltage drop after (15 ± 1) s.

Equipment and tolerances:

Electrode stiffness with axis eccentricity ≤ 0.1 mm and electrode speed at contact ≤ 15 mm/s.
Sensing clamps located >15 mm from current introduction; if electrode caps used, attach clamps to electrodes.
Typical force ranges given: Aluminium 5–7.5 kN, Steel ~3.5 kN (max error ±5%).
Electrode materials: CuCrZr or CuCr; example diameters W 20 mm (Al) and W 16 mm (steel); working-face radii specified.
d.c. power source and voltmeter specifications and resolution requirements (micro‑ohm sensitivity).

Statistics & calculations: Mean Rt, standard deviation and coefficient of variation calculated per Clause 6 using results from the test series.

Reporting: Test report shall include results, test date, reference to ISO 18594:2007 and examiner’s name/signature. Annex A provides a sample report layout.

Applications and who uses it

Welding engineers and quality control laboratories assessing resistance welding process consistency, weldability and electrical contact performance for aluminium and steel components.

R&D teams developing electrode designs, coatings or surface treatments where contact resistance influences heat generation and weld quality.

Automotive, aerospace and manufacturing QA departments performing comparative testing of materials/coatings, validating process parameters for spot, projection or seam welding.

Related standards

ISO 5821 - Resistance spot welding electrode caps (referenced in the bibliography of ISO 18594:2007).

Keywords: ISO 18594, resistance welding, transition resistance, spot welding, seam welding, projection welding, aluminium, steel, measurement procedure, contact resistance, welding quality, test report.

ISO 18594:2007 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and who uses it

Related standards

Технические детали

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