DKBA04000190-E华为图纸说明规范

Requirements for Plastic and Rubber Products.

Dimensions with () are reference dimensions, that are used in closed loop in

dimensioning chain, and its value is for reference only. Reference size sample shown in Figure 4.

? Reference dimension

Level 1 sueface

The surface marked with level 1 surface on the drawing (as shown in 5) is

appearance surface, It means that there is a higher quality requirement of the surface appearance, the quality of surface appearance of these parts must meet appropriate requirement (specific requirements are described detailedly in product quality specification, or in process quality specification,or in drawings)

? Level 1 surface description

? Riveted part marked

No marked is provided for base holes of rivet fasteners. The processors should based on the design to select fasteners, and they can drill base holes according to the craft, but the quality must meet to DKBA0.480.0128 (Technical Requirement of Riveting Fasteners). If \area of the fastener is on the rear side of the view, as shown in 6

? Rivet Fastener Legend

? Welding symbols marked

see the DKBA04000139 (Quality Requirements for Welding)

? Fastener material and surface treatment marked

It to distinguish the different materials and surface treatment is by the letters which followed by the name of the fastener,and the defaulf material is carbon.Following is the meaning of each letters:

_S：the material is stainless steel _Cu：the material is brass _Al：the material is aluminum

_ZC：Zinc electroplating with yellow conversion coating _H：Zinc electroplating with back conversion coating _N：Electroplating nickel

_ZnNi：Electroplating Zinc- nickel alloy _ZnAl：Zn-Al Flake Coating

Example:

GB5783-2000_M10x135_S meanings stainless steel hex bolts

GB5783-2000_M10x135_S_ZnAl meanings stainless steel hex bolts with Zn-Al Flake Coating.

The rivet without suffix dafect to aluminium rivet,and the strength grade is Lever 10, if with suffix _s means the material of rivet collar and bar are austenite stainless steeel.

? Description of Material Bar

The notation of every material contains English letters, Arabic numerals and some single-byte punctuation symbol. Each notation is not exceeds 25 characters.

As a basic principle for notating a material, if the material grades (or code) and the processing state are clearly indicated in a national standard of China, the material grades and processing state must be indicated in the notation; otherwise, the material should be notated in accordance with this Specification or other relevant material selection specifications.

? Marked Form of Standard Material

If the following marked format of material in the material bar, it means the standard material was selected. These materials contain metallic raw materials and non-metallic materials (plastic, rubber, and compound materials, label, film).

Fill in each *. The punctuation symbols in the notation are fixed and should not be changed. The notation must not contain any space.

For detail notation description, see 2.

?

Detail description of material notation

Field Requirement Base material Required symbol Notation method① Fe Al Zn Cu Pla Com Rub Glass Film Label Ins Metal Description Steel Aluminum Zinc-base alloy Copper Plastic Compound material Rubber Glass Film Label Insulation material Material grade compliant with in a Chinese Grade or Required code Grade or code Nonmetal Code Optional State Metal processing state (heat treatment state) Nonmetal Color or flame retardant grade or others national standard,or is coded by Huawei Technologies Co., Ltd.. The requirements for these material are refered to DKBA0.400.0114. The abbreviation of the material name, or the English name or universal code of the material; For a compound of multiple compositions, indicate the ratio of each composition in parentheses following the composition, with compositions of larger ratios preceding those with smaller ratios.Example: Com，PA66+GF(25%) For the material that are used in products supplying to North America, there is ”/NEBS” after the material code. The requirements for these material are refered to DKBA0.400.0112 . Notate as per relevant Chinese standard. Blank T1.0 D5.0 D15x3.0 D-1/15x3.0 Specification symbol (red) and Dimension② 6S5.0 Optional 8S5.0 12x12 12x5 Blank Special instruction Optional Blank [10 L63x6x7 back adhesive Color or retardant grade of the material, to identify different materials; in the case of multiple states（state1）, separate the states with a hyphen (-)(state2). Use the code of OBSERVATIONAL STANDARD of Huawei (see DKBA0.400.0001) to notate the color. “clear” means “colorless and transparent”. “nature” means the material free of color masterbatch. Refer to DKBA0.400.0112 for the notations of flame retardant grade. The state is not indicated, namely there is no state notation or identification requirement. The state, including the preceding symbol (-) must be omitted. Plate, with a thickness of 1.0 mm Round bar, with a diameter of 5.0 mm Round tube, with an outer diameter of 15 mm and a wall thickness of 3.0 mm Quadrate tube, with a side length of 15 mm and a wall thickness of 3.0 mm Hexagonal bar, with 5.0 mm distance between parallel edges Octagonal bar, with 5.0 mm distance between parallel edges Square section bar, with a side length of 12 mm Flat section bar, with side lengths of 12 x 5 (mm) Channel iron,according to GB/T706 type 10 Angle iron,according to GB/T706 type 6.3 Die cast or extruded section or injection molded part, with the dimensions indicated on the design drawing Film material with adhesive on back . Example:Film,PC,T0.25/back adhesive No marked if the material without special requirement,including the symbol (/) must be omitted