ASM-SMT-Technical Conditions of Order and Deliveries (TCOD) - 第19页
19 www.asm-smt.com As dimension “a” for the removal according to DIN ISO 13715, a deburred dimension of – 0 .1 to – 0.5mm is defined unless otherwise specified in the draw ings. The through-holes of the counter bored hol…
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9. Technical Requirements
The requirements and standards listed in this chapter shall apply unless other specifications are included in the product
specific documentation.
9.1. Mechanical components and assemblies
The independence principle as defined in ISO 8015 shall apply as a tolerance standard.
9.1.1. General tolerances
Applicable standards
ISO 1101: Geometrical product specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, location
and run-out
ISO 5459 Geometrical product specifications (GPS) - Geometrical tolerancing - Datums and datum systems
ISO 2692 Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material requirement (MMR),
least material requirement (LMR) and reciprocity requirement (RPR)
ISO 14405 Geometrical product specifications (GPS) - Geometrical tolerancing - Dimensional tolerancing
ISO 5458 Geometrical Product Specifications (GPS) - Geometrical tolerancing - Positional tolerancing
ISO 1302 Geometrical Product Specifications (GPS) - Indication of surface texture in technical product documentation
ISO 2768 General tolerances
ISO 2768-1 Part 1: Tolerances for linear and angular dimensions without individual tolerance indications
ISO 2768-2 Part 2: Geometrical tolerances for features without individual tolerance indications
The general tolerances apply to the finished parts, including the surface according to DIN ISO 2768 Part 1 and 2. ASM AS
has defined the tolerance classes “m” (T1) and “H” (T2).
9.1.2. Fits
Applicable standards
ISO 286 Geometrical product specifications (GPS) – ISO code system for tolerances on linear sizes
ISO 286-1 Part 1: Basis of tolerances, deviations and fits
ISO 286-2 Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts
This standard defines the fit systems of basic hole and basic shaft as well as the terms of main dimensions, fundamental
tolerances, tolerance zone, degree of tolerance and tolerance class.
9.1.3. Drilled / counter bored holes
Applicable standards
ISO 15065:2005 Countersinks for countersunk head screws with head configuration in accordance with
ISO 7721
ISO 13715 Technical product documentation—Edges of undefined shape—Vocabulary and
Indications
DIN EN ISO 15065 Counter bores for countersunk screws with standard heads according to ISO 7721
DIN 974-1 (Eng) Counter bores for cap screws
DIN 974-2 (Eng) Counter bores for hexagon head cap screws
ISO 273:1979 Fasteners – Clearance holes for bolt and screws
For blind holes, the specified dimensions for hole depths without specific tolerances should be considered as minimum
dimensions.
The edges that result from the production of drilled and counter bored holes must be free of burrs as defined in DIN ISO
13715.
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As dimension “a” for the removal according to DIN ISO 13715, a deburred dimension of –0.1 to –0.5mm is defined unless
otherwise specified in the drawings.
The through-holes of the counter bored holes are produced according to ISO 273:1979, design “medium (m)”.
9.1.4. Threads
Applicable standards
DIN 13-1 ISO general purpose metric screw threads - Part 1: Nominal sizes for coarse pitch threads;
nominal diameter from 1 mm to 68 mm
ISO 3508 Thread run-outs for fasteners with thread in accordance with ISO 261 and ISO 262
DIN 78 Protrusion of bolt ends
DIN 7952 Sheet metal anchorage with threads; dimensions
ISO 261 ISO general purpose metric screw threads – General plan
ISO 262 ISO general purpose metric screw threads – Selected sizes for screws, bolts and nuts
ISO 965 ISO general purpose metric screw threads – tolerances
Dimensions for thread depths without specific tolerances should be considered as minimum dimensions.
Thread run-outs / undercuts shall be designed as for the standard described in ISO 3508.
Deviating from ISO 3508, a 90° counter bore is permitted for internal threads, where the diameter of the counter bore shall
be 1–1.05 x of the internal diameter of the thread.
Thread ends shall be produced according to DIN 78. For external threads, a 45°chamfer shall be added, with an
incomplete thread in the run-out area up to 2x P (P = thread lead) being permitted.
9.1.5. Quality of edges
Applicable standards
ISO 13715 Technical product documentation—Edges of undefined shape—Indication and dimensioning
The edges must be produced free of burrs according to DIN ISO 13715.
For machined parts (except plates and thin-walled parts), the dimension “a” (see DIN ISO 13715) shall be –0.1 to –
0.5mm.
For plate or thin-walled parts, it must be ensured that the width of the remaining surface between two deburred edges
does not become smaller than the dimension of the removed material. In cases where deburring causes new hazards of
injury, the edges shall be rounded in a suitable manner or the edge quality shall be coordinated with ASM AS.
9.1.6. Quality of bends
Applicable standards
DIN 9003 Aerospace; bending of sheets, plates and strips of steel and heat-resisting alloys, bending
radii, directions for design
The bending zones must be free from cracks and must not be coarse-grained.
9.1.7. Adhesive specifications
Applicable standards
When adhesive joints are required, the order documentation or drawings must include the corresponding information.
If such information is missing, this shall be clarified with ASM AS.
All adhesive joints shall be produced according to the relevant specifications of the adhesive manufacturers.
The retaining forces indicated in the documents are to be examined and documented by suitable measures, in order to
prove process security.
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9.1.8. Surfaces
Applicable standards
ISO/CIE 11664-6:2014 Colorimetric determination of color differences with surface colors based on the
CIELAB formula
ISO 2813 Paints and varnishes -- Determination of gloss value at 20 degrees, 60 degrees and 85 degrees
DIN EN ISO 2819 Metallic coatings on metallic substrates - Electrodeposited and chemically deposited
coatings –
Review of methods available for testing adhesion
The attributes specified in the drawings refer to the finished parts including their surface finish. Damage and scratches are
always unacceptable. This applies especially to visible and plastic parts.
Electro-plated and chemically plated surfaces
Unacceptable are:
• - Blisters in the coating
• - Flaking of the coating
• - Incomplete copper or nickel plating (in case of chemically nickel-plated surfaces)
• - Burned edges and surfaces
• - Rough, matte or buddy coatings
• - Patchy surfaces, dripping zones
• - Mechanically damaged coatings
Paint-coated / powder-coated surfaces
It must be ensured that the paints / powders are processed in compliance with the specifications of the paint or powder
manufacturers. The parts to be paint-coated must be free from corrosion, scale, gummed oil and other contaminations.
The coated surfaces must be evenly covered and free from contamination. Coated surfaces for lining parts (hoods, doors)
must be free from wax and separating compounds in order to ensure an optimum bonding of insulation materials. In the
case of changes of colors or structures, a sample must be released by ASM AS. If required, the surfaces to be coated
shall be provided with a primer meeting the requirements before coating.
Details regarding paint- and powder manufactures are specified in the product documentation or if necessary to
ask for by the purchaser.
To avoid color differences, the paints and powders should be purchased from these manufacturers.
Uncoated surfaces
As a rule, machined surfaces, fits and threads must remain uncoated. Exceptions are specifically marked in the drawings
as “coated”, “powder-coated” or similar.
Paint residues or residues of masking and wear materials on the parts are not permissible.
Uncoated or untreated surfaces of steel parts must be adequately protected against corrosion.
Recommended anticorrosion: SPC Surface Shield ML C 23411 or WD 40 (internet link: www.wd40.com)
Other surfaces
According to generally applicable technical specifications.
9.1.9. Welding / flame-cutting
Applicable standards
ISO 630-1:2011 Hot-rolled products of non-alloy structural steels; technical delivery conditions (10025-
1/2/3/4/5/6/7
ISO 10474 Steel and Steel Products – Inspection documents
DIN EN ISO 3834 -1 Quality requirements for fusion welding of metallic materials - Part 1 : Criteria for the
selection of the appropriate level of quality requirements
DIN EN ISO 3834 -2 Quality requirements for fusion welding of metallic materials - Part 2: Comprehensive
quality requirements
DIN EN ISO 3834 -3 Quality requirements for fusion welding for metallic materials - Part 3: Standard quality
requirements