钣金冲压件质量要求

1、精选优质文档-倾情为你奉上精选优质文档-倾情为你奉上专心-专注-专业专心-专注-专业精选优质文档-倾情为你奉上专心-专注-专业DKBA华为技术有限公司内部技术规范DKBA0.450.0040 REV C钣金冲压件质量要求Specification For Sheet-metal Punching Part 2012年07月30日发布 20012年09月1日实施华为技术有限公司Huawei Technologies Co., Ltd.版权所有 侵权必究All rights reserved修订声明Revision declaration本规范拟制与解释部门：整机工程部基础平台部本规范的相关系列规

2、范或文件:无相关国际规范或文件一致性：无替代或作废的其它规范或文件：无相关规范或文件的相互关系：无规范号主要起草部门专家主要评审部门专家修订情况DKBA0.450.0040 REV C基础平台部：潘建军（）肖春秀()整机工程部：郭天次（）许志敏（），黄涛（）张实（），钟宏辉（），张润孝（）MQE:陈亮（）SQE:王进（）1、增加了自铆质量要求；2、刷新了钣金件公差要求。DKBA0.450.0040 REV B质量成本管理部：肖春秀53994整机工程部:周伟 ,郑玲 李俊周 ,魏华 杨曦晨 ,和永超 57041MQE：曾松来TQC：马宝兴39736CEG：郑连东 1、将外观表面的定义引用于DKB

3、A0.400.00212、增加了翻边攻丝的质量要求；DKBA0.450.0040 REV1.0质量成本管理部：肖春秀53994质量成本管理部：盛辉21628、周伟16271结构平台开发部：郑玲15593MQE：陈军17658TQC：马宝兴39736新归档目 录 TOC o 1-3 h z u 图目录 TOC h z c 图 表目录 TOC h z c 表 REF 文档名称 h * MERGEFORMAT 钣金冲压件质量要求 Specification For Sheet-metal Punching Part范 围Scope:本规范规定了华为的钣金冲压件（表面处理前）的质量要求、检验规则。本规

4、范适用于华为所有的钣金冲压件（表面处理前），设计图中有注明的要求以设计图为准，图中未注明的按此规范为准。简 介Brief introduction：规定了钣金冲压件(零件级)的质量要求及检验规则。关键词Key words：外观、表面状态、工艺槽口、圆角半径、A类区域、B类区域、毛刺、毛刺高度华为技术文件优先级说明：华为产品生产执行的技术文件有：华为图纸、华为企业标准规范、通信设备行业标准、中国国家标准、国际标准。这些标准的优先级别从高到低依次为：华为图纸-华为企业标准规范-通信设备行业标准-中国国家标准-国际标准。如果各级文件之间有不一致的地方，应按最高级别的文件执行。在华为企业标准规范中，产

5、品专用标准优先于通用技术标准。术语和定义Term&Definition：缩略语Abbreviations 英文全名 Full spelling中文解释 Chinese explanationA类区域Class A Area在钣金供应商交货时，产品在正常工作位置手能触膜到的边角区域；以及设计图中特别要求的部位。B类区域Class B Area不属于A类的区域都为B类区域毛刺Burr指板料冲裁后留在冲裁件断面边缘锋利的凸起，毛刺高度Height Of Burr指板料冲裁后留在冲裁件断面边缘锋利的凸起的高度毛刺面Surface of Burr指边缘有毛刺的冲裁件平面。对于落料，毛刺面是接触凸模的平面

6、；对于冲孔，毛刺面是接触凹模的平面。1级表面Class 1 Surface重要外观表面，体现产品外观形象，具有装饰性，可以直接正视到的主要外观表面。主要包括机柜、插框（包括一体化机箱和数通机箱）、无线射频模块、盒式结构、拉手条等的正面和正面上主要零部件的外表面、机柜前门开门后的正视面、高度小于、等于1.8米的机柜顶面（如Hert中机柜顶面）等。2级表面Class 2 Surface主要外表面，半装饰性的经常可见的外观表面。主要包括机柜方孔条正面、机柜外部侧面、机柜后面、插框（包括一体化机箱和数通机箱）、无线射频模块的外部侧面和后面及防护网等处经常被打开的可视面等。小五金件、机柜机箱附件等均定义

7、为2级表面。3级表面Class 3 Surface次要外表面和内表面，不是以装饰为目的，表面质量要求不高的结构表面。主要包括机柜、插框（包括一体化机箱和数通机箱）、无线射频模块、盒式结构、拉手条等的内表面和底面、高度大于1.8米的机柜顶面以及安装支架、绑线架、内部框架、内部焊件的所有表面等。除1、2级表面外的表面均为3级表面。 技术要求外观及表面状态一般要求零件的毛刺面朝向要求毛刺面朝向零件里面，如图1：图 SEQ 图 * ARABIC 1 折弯件毛刺方向示意图特殊情况：按编码级分析零件之间的装配关系，零件的毛刺面应在里面或非功能面；如“L”型的零件为滑道，则毛刺面应在零件的外面，与上图相反。

8、冲裁类平板零件圆角要求图样上未注明的外形和内缘小于或等于90的尖角处应制成圆角（见 REF _Ref n h * MERGEFORMAT 图2），其圆角半径r按 REF _Ref n h * MERGEFORMAT 表1规定。图 SEQ 图 * ARABIC 2 平板件的尖角示意图表 SEQ 表 * ARABIC 1 平板件圆角半径r值材料厚度 t 0.30.30.50.5112233圆角半径r0.20.30.511.50.5t零件上止裂孔、工艺槽要求当设计文件或图样上注明允许开止裂孔或工艺槽口时，其止裂孔直径和工艺槽口尺寸，按下列要求选择：1、止裂孔直径d（见图3）不大于2t； 图 SEQ

9、图 * ARABIC 3 止裂孔直径示意图2、工艺槽口尺寸L和b（见 REF _Ref n h * MERGEFORMAT 图4）；当t0.5mm时，1mmb1.5 t （如1.5t1，则b=1）；当t0.5mm时，b=1mm。Lt+r+0.5b图 SEQ 图 * ARABIC 4 工艺槽口示意图弯曲零件未注圆角R要求当图样上未注明弯曲半径时，允许按内弯曲半径R不大于t（t为材料厚）且最小值为0.2。翻边攻丝质量要求1、普通翻边高度H值和螺纹寿命满足以下要求：图 SEQ 图 * ARABIC 5 翻边攻丝示意图表 SEQ 表 * ARABIC 2 普通翻边高度H值和螺纹最少反复打入次数螺纹规格

10、板厚T翻边高度H（公差+0.30）内圆角R最大值最少反复打入次数M30.81.80.3121.02301.22.2301.52.430M41.02.4301.22.6301.5330M51.22.4301.52.7302、 薄板连接用的带锥台翻边攻丝 该翻边攻丝孔用于薄板连接的场景，实现M3国标沉头螺钉在0.8、1.0mm板材上不凸出板面,使翻边高度H值和螺纹寿命满足以下要求图 SEQ 图 * ARABIC 6 薄板连接用带锥台翻边攻丝孔结构示意图表 SEQ 表 * ARABIC 3 薄板连接用带锥台翻边攻丝孔翻边高度H值和螺纹最少反复打入次数螺纹规格材料板厚T翻边后底孔内径D1(参考)翻边高

11、度H（公差+0.20）沉头孔大径D3 (公差0.1)最少反复打入次数M3钢1000636316016040040010001000冲裁特征圆孔直径0.100.150.20-0.150.200.30-孔间距0.100.150.200.250.300.150.200.300.400.50孔边距0.100.150.200.250.300.150.200.300.400.50直边距0.100.150.200.250.300.150.200.300.400.50冲裁角度030030030-1.0030030-特征分类尺寸分类特征示意图f级(精密精度)m级(中等精度)6363160160400400100

12、01000636316016040040010001000成型特征孔到折弯边距离0.150.200.200.250.300.200.300.500.500.50(1次折弯)直边到折弯边距离0.150.200.200.250.300.200.300.500.500.50(1次折弯)孔间距0.200.250.250.300.400.250.300.500.500.75(2次折弯)折弯边到折弯边距离0.150.200.200.250.300.250.300.500.500.75(2次折弯)直边到折弯边距离0.200.250.250.300.400.300.400.500.751.00(3次折弯)折弯

13、边到折弯边距离0.250.300.300.400.500.300.400.500.751.00(4次折弯)孔间距0.200.250.250.300.400.300.400.500.751.00(4次折弯)特征分类尺寸分类特征示意图f级(精密精度)m级(中等精度)636316016040040010001000636316016040040010001000成型特征直边到直边距离0.200.250.250.300.400.300.400.500.751.00(4次折弯)局部成型1010252563-1010252563-形状尺寸0.150.200.30-0.200.300.50-局部成型0.15

14、0.200.200.250.300.200.300.500.751.00位置尺寸压死边长度0.15-0.30-压死边厚度0.2-0.3-(无间隙)00压死边厚度0.20-0.30-(有间隙)折弯角度0.50.50.50.50.51.01.01.01.01.0特征分类尺寸分类特征示意图f级(精密精度)m级(中等精度)636316016040040010001000636316016040040010001000其它特征喷涂保护尺寸1.01.51.51.52.01.01.51.51.52.0丝印尺寸0.50.50.50.5-0.50.50.50.5-平面度0.30.50.81.530.50.81.

15、535(平面内少量冲裁特征)平面度0.50.81.5350.81.5357(平面内有成形、焊缝或密孔等特征)说明：上表适用于厚度不大于1.5mm板材，大于1.5mm厚度的板材其公差可酌情相应增加30%左右；上表适用于冷轧板、镀锌板等常用板材，弹簧板等板材其公差可酌情相应增加；冲密孔（通风孔）尺寸公差可参照相应冲裁尺寸公差放大；压印、压字、加强筋、线桥、凸台、敲落孔、百叶窗等特征公差均可参照局部成形公差值；压铆螺母/螺柱/螺钉等位置尺寸公差值在其底孔的位置尺寸公差值基础上加0.05；注示为的冲裁角度、折弯角度的尺寸分段分别指相应特征冲裁短边尺寸、折弯短边尺寸数值分段；注示为的公差数值根据工序调整

16、（先折弯后冲孔）可按冲裁孔间距标注公差；注示为的平面度尺寸分段指平面内最大对角线长度尺寸分段；直线度公差值可参照上表中的平面度公差值执行；对于多于4折的折弯特征，其累积公差按每折加0.05的精度来处理；对于多于4折的折弯特征，可以提高其中某一折的尺寸精度，提高的精度值可参照1次折弯精度；对于上表中未列出的特征，其尺寸公差可参照相似/相近的特征公差来处理；其它说明钣金件尺寸及公差要求是指钣金件成品尺寸及公差，即表面处理（钝化、氧化、电镀、喷涂等）后的尺寸及公差；检验规则检验类别一般检验一般检验是指根据设计图样和工艺文件的规定，对钣金冲压件进行的外观检验、尺寸及公差配合检验及常规性能检验。外观检验

17、是依靠手摸、目测、光照反射、光照投影等方法对钣金冲压件的外观进行检验；尺寸及公差配合检验是采用工具、夹具、量具，以检验钣金冲压件的尺寸、形状、位置公差；一般检验可按工艺文件要求或采用标准样件作为对照判定的依据。补充检验补充检验是指一般检验以外的检验。它包括硬度检验、磁性检验、弹性检验、渗透检验、无损探伤检验等。检验原则钣金冲压件必须进行首件检验、巡回检验和验收检验；钣金冲压件原则上只进行一般检验；当设计图样或其它技术文件有具体要求时，应进行补充检验；批量生产的钣金冲压件，按需要可进行抽检或全检，抽检的方法一般按GB 2828和GB 2829的规进行；全检一般仅检验主要部分（包括特定的外观要求）

18、。检验规定冲裁、剪切零件的外形按最大尺寸处进行测量；内孔按最小尺寸处进行测量；止裂孔直径及工艺槽口尺寸，只在展开料时检查，零件成形后不作检查；加工后易变形，而在装配时能重新恢复所需几何形状的零件，其尺寸和形状误差，可在装配状态下测量，在自由状态下允许超出极限尺寸。Contents TOC h z t 标题 1,1,标题 2,2,标题 3,3, Heading 1,1,Heading 2,2,Heading 3,3 Figures TOC h z t Figure Description,1 c Figure Tables TOC f t h z t Table Description,1 c

19、Table Specifications for Sheet-metal Punching PartsScopeThis specification covers the general quality requirements and inspection rules for Huawei sheet-metal punching parts (before surface treatment).This specification applies to Huaweis all sheet-metal punching parts (before surface treatment). Re

20、ference is given to the design drawings with noted requirement and to this specification if not noted in the design drawing.Brief IntroductionThis specification provides the general quality requirements and inspection rules for sheet-metal punching parts.KeywordsAppearance, surface status, technical

21、 rabbet, fillet radius, class A area, class B area, burr, and burr height.Revision DeclarationStatement on the Priority of Huawei Technical DocumentsHuawei products are manufactured based on the following documents which are listed in order of priority: Huawei drawings, Huawei enterprise technical s

22、tandards, telecommunications industry standards, China national standards, and international standards. Shall there be discrepancy between these documents, the document of the highest priority takes precedence.Among Huawei enterprise technical standards, specific product standards have higher priori

23、ties than general standards.Term & DefinitionFull SpellingChinese ExplanationClass A AreaCorner areas touchable by hands in the normal working position of products when delivered by sheet-metal suppliers; and areas specially required in design drawings.Class B AreaAreas except for Class A AreaBurrBu

24、rr on the cross section of finished products when blanking sheet metalHeight Of BurrBurr height on the cross section of finished products when blanking sheet metalLevel 1 SurfaceCritical surface represents the product appearance. Through this kind of decorative surface, you can directly see the majo

25、r product appearance, including the outer surface of the front and of the main parts installed on the front of the cabinet, subrack (involving the integrated chassis and data communications chassis), radio frequency module, box, handle bar, and the surface that you can directly see after opening the

26、 front door of the cabinet.Level 2 SurfaceMajor outer surface is half-decorative and is commonly seen, including the front of the mount bar on the cabinet, sides outside the cabinet, rear of the cabinet, sides outside and at rear of the subrack (involving the integrated chassis and data communicatio

27、ns chassis) and radio frequency module, and topside of the cabinet that is lower than 1.8 m. Surfaces of the ironware and accessories of the cabinet and chassis are all defined as level 2 surfaces.Level 3 SurfaceMinor outer surface and inner surface. These surfaces are not decoration-oriented and no

28、t demanding on the surface quality, including the inner surface and underside of the cabinet, subrack (involving the integrated chassis and data communications chassis), radio frequency module, box, and handle bar, topside of the cabinet that is higher than 1.8m, and all surfaces of the installing s

29、upport, bundling rack, inner frame, and inner solder. Surfaces that not belong to level 1 and level 2 surfaces are level 3 surfaces.Technical RequirementsGeneral Requirements for Appearance and Surface The burr surface is required to be inside the parts, as shown in REF _Ref r h * MERGEFORMAT Figure

30、 1:Figure SEQ Figure * ARABIC 1 Burr of bendsExceptions: the burr surface is the inner surface or non-functional surface of parts if the assembling relationship between parts is analyzed based on the coding level; the burr surface is the outer surface of parts if L-shaped parts are slideways, and op

31、posite to the above diagram. Blanked and sheared panel parts taper angles with outer shapes and inner edges smaller than or equal to 90 which are not noted on the drawing should be made as fillets (as shown in REF _Ref n h * MERGEFORMAT Figure 2) with a radius (r) specified as Table 1.Figure SEQ Fig

32、ure * ARABIC 2 Taper angles of panel partsTable SEQ Table * ARABIC 1 Radius (r) of taper angleThickness (t) of materials 0.30.30.50.5112233Radius (r) of taper angle 0.20.30.511.50.5t If allowable as marked in design documents or drawings, stop holes or technical rabbets can be open according to the

33、following hole diameter and rabbet size.d, diameter of stop holes (as shown in REF _Ref n h Figure 3), should be smaller than or equal to 2 t;Figure SEQ Figure * ARABIC 3 Diameter of stop holesL and b, sizes of technical rabbets (as shown in REF _Ref n h Figure 4);When t 0.5 mm, 1 mm b 1.5 t (if 1.5

34、 t 1, b = 1)When t 0.5 mm, b = 1 mm.L t + r+0.5bFigure SEQ Figure * ARABIC 4 Technical rabbetParts formed by curving without a curving radius noted on the drawing can be made with an internally curving radius R no larger than t (thickness of materials) and no smaller than 0.2.Requirements for flangi

35、ng-hole with thread：Requirements for height(H) and Min removable times of flanging (as shown in REF _Ref n h * MERGEFORMAT Figure 5) Figure SEQ Figure * ARABIC 5 Schematic diagram for flanging-hole with threadTable SEQ Table * ARABIC 2 The data of height(H) and Min removable timesThreadPlate thickne

36、ss(T)Inner diameter of flanging-hole(D1)High of flanging-hole(H)(Tolerance 0+0.3)Max. RMin removable times(Time)M30.82.51.80.3121.02301.22.2301.52.430M41.03.32.4301.22.6301.5330M51.24.22.4301.52.7302、 Flanging-hole with thread for thin sheet connectedThe flanging-hole is used in thin sheet connected

37、, to achieve that standard countersunk head screw M3 could be sunk into the plate surface with thickness 0.8mm or 1.0 mm. Requirements for height(H) and Min removable times of flanging (as shown in REF _Ref n h * MERGEFORMAT Figure 6).Figure SEQ Figure * ARABIC 6 Schematic diagram for flanging-hole

38、with thread for thin sheet connectedTable SEQ Table * ARABIC 3 The data of height(H) and Min removable times for flanging-hole with thread for thin sheet connectedThreadMaterialPlate thickness(T)Inner diameter of flanging-hole D1(Reference)High of flanging-hole(H)(Tolerance 0+0.2)Outer diameter of f

39、langing-hole D3 (Tolerance0.1)Min removable times(Time)M3Steel 1000 63631601604004001000 1000BlankingHole diameter0.100.150.20N/AN/A0.150.200.30N/AN/ADistance between two holes0.100.150.200.250.300.150.200.300.400.50Distance between a hole and an edge0.100.150.200.250.300.150.200.300.400.50Distance

40、between a line and an edge0.100.150.200.250.300.150.200.300.400.50Blanking angle 030030030N/AN/A1.0030030N/AN/ACharacteristicDiameter, Distance, or AnglePictureLevel f (High Precision)Level m (Average Precision) 636316016040040010001000 63631601604004001000 1000FormingDistance between a hole and a b

41、ent flange0.150.200.200.250.300.200.300.500.500.50(one bend)Distance between a bent flange and a flat edge0.150.200.200.250.300.200.300.500.500.50(one bend)Distance between two holes0.200.250.250.300.400.250.300.500.500.75(two bends)Distance between two bent flanges0.150.200.200.250.300.250.300.500.

42、500.75(two bends)Distance between a flat edge and a bent flange0.200.250.250.300.400.300.400.500.751.00(three bends)Distance between two bent flanges0.250.300.300.400.500.300.400.500.751.00(four bends)Distance between two holes0.200.250.250.300.400.300.400.500.751.00(four bends)CharacteristicDiamete

43、r, Distance, or AnglePictureLevel f (High Precision)Level m (Average Precision) 636316016040040010001000 63631601604004001000 1000FormingDistance between two flat edges0.200.250.250.300.400.300.400.500.751.00(four bends)Partial forming 1010252563N/AN/A1010252563N/AN/AHeight0.150.200.30N/AN/A0.200.30

44、0.50N/AN/APartial forming0.150.200.200.250.300.200.300.500.751.00LengthLength of a blank holding surface (zero gap)0.15N/AN/AN/AN/A0.30N/AN/AN/AN/ADepth of a blank holding joint (zero gap)0.2N/AN/AN/AN/A0.3N/AN/AN/AN/A00Depth of a blank holding joint (with gap)0.20N/AN/AN/AN/A0.30N/AN/AN/AN/ABending

45、 angle 0.50.50.50.50.51.01.01.01.01.0CharacteristicDiameter, Distance, or AnglePictureLevel f (High Precision)Level m (Average Precision) 63631601604004001000 1000 63631601604004001000 1000OthersSize of a free-of-painting area1.01.51.51.52.01.01.51.51.52.0Length of a silk screen0.50.50.50.5N/A0.50.5

46、0.50.5N/AFlatness 0.30.50.81.530.50.81.535(with little blanking processes)Flatness 0.50.81.5350.81.5357(with forming, welding, and piercing processes)The table applies only to metal sheets with depths less than or equal to 1.5 mm. For metal sheets with greater depths, the tolerances increase by arou

47、nd 30%.The table applies only to common metal sheets, such as cold-rolled sheets and galvanized sheets. Spring sheets allow larger tolerances.Size tolerances for high-density holes (ventilation holes) can be larger than blanking tolerances.For tolerances for imprinted marks, imprinted words, ribs, l

48、ine bridges, embossments, knock-off holes, and shutters, see the tolerances for partial forming in the table.Size tolerances for rivet nuts, studs, or screws are 0.05 larger than those for hole sizes.Size segments of tolerances marked with correspond to the lengths of the shorter blanking flange and

49、 bent flange.Tolerances marked with are adjusted based the process sequence (bending first and piercing later) and can be the distance between two holes.Size segments of tolerances marked with correspond to the length of the longest diagonal line on a surface.Straightness tolerances equal the flatne

50、ss tolerances.If more than four bends are applied, tolerance for each additional bend increases by 0.05.Tolerances for listed characteristics in the table apply to similar unlisted characteristics.RemarksThe sizes, diameters, and distances and their tolerances apply to finished metal sheets that have undergone surface processing, such as passivation, oxidation, plating, and painting.Inspection Rule Inspection CategoryGeneral InspectionGeneral inspection involves appearance checks, size and allowance t