鈑金沖壓件質(zhì)量要求

1、DKBA華為技術(shù)有限公司內(nèi)部技術(shù)規(guī)范華為技術(shù)有限公司內(nèi)部技術(shù)規(guī)范DKBA0.450.0040 REV C鈑金沖壓件質(zhì)量要求鈑金沖壓件質(zhì)量要求Specification For Sheet-metal Punching Part 2012年07月30日發(fā)布 20012年09月1日實施華為技術(shù)有限公司Huawei Technologies Co., Ltd.版權(quán)所有 侵權(quán)必究All rights reserved 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第2頁, 共44頁 Page 2 , Total 44修訂聲明Revision d

2、eclaration本規(guī)范擬制與解釋部門：整機(jī)工程部基礎(chǔ)平臺部本規(guī)范的相關(guān)系列規(guī)范或文件:無相關(guān)國際規(guī)范或文件一致性：無替代或作廢的其它規(guī)范或文件：無相關(guān)規(guī)范或文件的相互關(guān)系：無規(guī)范號規(guī)范號主要起草主要起草部門專家部門專家主要評審部門專家主要評審部門專家修訂情況修訂情況DKBA0.450.0040 REV C基礎(chǔ)平臺部：潘建軍（00118387）肖春秀(00053994)整機(jī)工程部：郭天次（0014571）許志敏（00114402），黃濤（00121968）張實（00118600），鐘宏輝（00121959），張潤孝（00049797）MQE:陳亮（00068994）SQE:王進(jìn)（001513

3、57）1、增加了自鉚質(zhì)量要求；2、刷新了鈑金件公差要求。DKBA0.450.0040 REV B質(zhì)量成本管理部：肖春秀53994整機(jī)工程部:周偉 00123276,鄭玲 00119690李俊周 00123308,魏華 00102167楊曦晨 00152131,和永超 57041MQE：曾松來00125372TQC：馬寶興39736CEG：鄭連東 001149491、將外觀表面的定義引用于DKBA0.400.00212、增加了翻邊攻絲的質(zhì)量要求；DKBA0.450.0040 REV1.0質(zhì)量成本管理部：肖春秀53994質(zhì)量成本管理部：盛輝21628、周偉16271結(jié)構(gòu)平臺開發(fā)部：鄭玲15593M

4、QE：陳軍17658TQC：馬寶興39736新歸檔 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第3頁, 共44頁 Page 3 , Total 44目目 錄錄 1.1.技術(shù)要求技術(shù)要求.6 61.1.1.1. 外觀及表面狀態(tài)一般要求外觀及表面狀態(tài)一般要求.61.1.1. 零件的毛刺面朝向要求.61.1.2. 沖裁類平板零件圓角要求.61.1.3. 零件上止裂孔、工藝槽要求.71.1.4. 彎曲零件未注圓角R要求 .71.1.5. 翻邊攻絲質(zhì)量要求.81.1.6. 自鉚質(zhì)量要求.91.1.7. 零件表面的外觀要求.101.2.1.2.

5、 鈑金沖壓件毛刺的要求鈑金沖壓件毛刺的要求.101.2.1. 毛刺的高度定義.101.2.2. 結(jié)構(gòu)件的毛刺區(qū)域分類.101.2.3. 鈑金沖壓件毛刺質(zhì)量要求.141.2.4. 鈑金沖壓件的熔渣要求.151.2.5. 鈑金沖壓件的接刀痕的要求.151.3.1.3. 鈑金沖壓件公差要求鈑金沖壓件公差要求.151.3.1. 公差要求.151.3.2. 鈑金件沖壓公差等級代號及數(shù)值.161.3.3. 其它說明.202.2.檢驗規(guī)則檢驗規(guī)則.21212.1.2.1. 檢驗類別檢驗類別.212.1.1. 一般檢驗.212.1.2. 補(bǔ)充檢驗.212.2.2.2. 檢驗原則檢驗原則.212.3.2.3.

6、檢驗規(guī)定檢驗規(guī)定.21圖目錄圖目錄圖 1 折彎件毛刺方向示意圖.6圖 2 平板件的尖角示意圖.6圖 3 止裂孔直徑示意圖.7 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第4頁, 共44頁 Page 4 , Total 44圖 4 工藝槽口示意圖.7圖 5 翻邊攻絲示意圖.8圖 6 薄板連接用帶錐臺翻邊攻絲孔結(jié)構(gòu)示意圖.8圖 7 自鉚連接示意圖.9圖 8 鈑金件毛刺示意圖.10圖 9 戶外機(jī)柜類A、B類區(qū)域判斷示意圖.12圖 10 室內(nèi)機(jī)柜類A、B類區(qū)域判斷示意圖.13圖 11 插箱類A、B類區(qū)域判斷示意圖.13圖 12 拉手條及面板

7、等小五金類A、B類區(qū)域判斷示意圖.14圖 13 盒式類A、B類區(qū)域判斷示意圖.14圖 14 倒角高度示意圖.15表目錄表目錄表 1 平板件圓角半徑r r值.6表 2 普通翻邊高度H值和螺紋最少反復(fù)打入次數(shù).8表 3 薄板連接用帶錐臺翻邊攻絲孔翻邊高度H值和螺紋最少反復(fù)打入次數(shù).9表 4 自鉚參數(shù)表.9表 5 自鉚連接點最小承力表.9表 6 毛刺高度的極限值.15表 7 鈑金公差數(shù)值表.16 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第5頁, 共44頁 Page 5 , Total 44鈑金沖壓件質(zhì)量要求鈑金沖壓件質(zhì)量要求 Speci

8、fication For Sheet-metal Punching Part范范 圍圍Scope:Scope:本規(guī)范規(guī)定了華為的鈑金沖壓件（表面處理前）的質(zhì)量要求、檢驗規(guī)則。本規(guī)范適用于華為所有的鈑金沖壓件（表面處理前），設(shè)計圖中有注明的要求以設(shè)計圖為準(zhǔn)，圖中未注明的按此規(guī)范為準(zhǔn)。簡簡 介介BriefBrief introductionintroduction：規(guī)定了鈑金沖壓件(零件級)的質(zhì)量要求及檢驗規(guī)則。關(guān)鍵詞關(guān)鍵詞KeyKey wordswords：外觀、表面狀態(tài)、工藝槽口、圓角半徑、A類區(qū)域、B類區(qū)域、毛刺、毛刺高度華為技術(shù)文件優(yōu)先級說明：華為技術(shù)文件優(yōu)先級說明：華為產(chǎn)品生產(chǎn)執(zhí)行的技術(shù)

9、文件有：華為圖紙、華為企業(yè)標(biāo)準(zhǔn)規(guī)范、通信設(shè)備行業(yè)標(biāo)準(zhǔn)、中國國家標(biāo)準(zhǔn)、國際標(biāo)準(zhǔn)。這些標(biāo)準(zhǔn)的優(yōu)先級別從高到低依次為：華為圖紙-華為企業(yè)標(biāo)準(zhǔn)規(guī)范-通信設(shè)備行業(yè)標(biāo)準(zhǔn)-中國國家標(biāo)準(zhǔn)-國際標(biāo)準(zhǔn)。如果各級文件之間有不一致的地方，應(yīng)按最高級別的文件執(zhí)行。在華為企業(yè)標(biāo)準(zhǔn)規(guī)范中，產(chǎn)品專用標(biāo)準(zhǔn)優(yōu)先于通用技術(shù)標(biāo)準(zhǔn)。術(shù)語和定義術(shù)語和定義Term&DefinitionTerm&Definition：縮略語縮略語AbbreviationsAbbreviations 英文全名英文全名 FullFull spellingspelling中文解釋中文解釋 ChineseChinese explanationexp

10、lanationA類區(qū)域Class A Area在鈑金供應(yīng)商交貨時，產(chǎn)品在正常工作位置手能觸膜到的邊角區(qū)域；以及設(shè)計圖中特別要求的部位。B類區(qū)域Class B Area不屬于A類的區(qū)域都為B類區(qū)域毛刺Burr指板料沖裁后留在沖裁件斷面邊緣鋒利的凸起，毛刺高度Height Of Burr指板料沖裁后留在沖裁件斷面邊緣鋒利的凸起的高度毛刺面Surface of Burr指邊緣有毛刺的沖裁件平面。對于落料，毛刺面是接觸凸模的平面；對于沖孔，毛刺面是接觸凹模的平面。1級表面Class 1 Surface重要外觀表面，體現(xiàn)產(chǎn)品外觀形象，具有裝飾性，可以直接正視到的主要外觀表面。主要包括機(jī)柜、插框（包括一

11、體化機(jī)箱和數(shù)通機(jī)箱）、無線射頻模塊、盒式結(jié)構(gòu)、拉手條等的正面和正面上主要零部件的外表面、機(jī)柜前 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第6頁, 共44頁 Page 6 , Total 44縮略語縮略語AbbreviationsAbbreviations 英文全名英文全名 FullFull spellingspelling中文解釋中文解釋 ChineseChinese explanationexplanation門開門后的正視面、高度小于、等于1.8米的機(jī)柜頂面（如Hert中機(jī)柜頂面）等。2級表面Class 2 Surface主要

12、外表面，半裝飾性的經(jīng)?？梢姷耐庥^表面。主要包括機(jī)柜方孔條正面、機(jī)柜外部側(cè)面、機(jī)柜后面、插框（包括一體化機(jī)箱和數(shù)通機(jī)箱）、無線射頻模塊的外部側(cè)面和后面及防護(hù)網(wǎng)等處經(jīng)常被打開的可視面等。小五金件、機(jī)柜機(jī)箱附件等均定義為2級表面。3級表面Class 3 Surface次要外表面和內(nèi)表面，不是以裝飾為目的，表面質(zhì)量要求不高的結(jié)構(gòu)表面。主要包括機(jī)柜、插框（包括一體化機(jī)箱和數(shù)通機(jī)箱）、無線射頻模塊、盒式結(jié)構(gòu)、拉手條等的內(nèi)表面和底面、高度大于1.8米的機(jī)柜頂面以及安裝支架、綁線架、內(nèi)部框架、內(nèi)部焊件的所有表面等。除1、2級表面外的表面均為3級表面。 1.1.技術(shù)要求技術(shù)要求1.1.1.1. 外觀及表面狀態(tài)一

13、般要求外觀及表面狀態(tài)一般要求1.1.1. 零件的毛刺面朝向要求毛刺面朝向零件里面，如圖1：圖 1 折彎件毛刺方向示意圖特殊情況：按編碼級分析零件之間的裝配關(guān)系，零件的毛刺面應(yīng)在里面或非功能面；如“L”型的零件為滑道，則毛刺面應(yīng)在零件的外面，與上圖相反。1.1.2. 沖裁類平板零件圓角要求圖樣上未注明的外形和內(nèi)緣小于或等于90的尖角處應(yīng)制成圓角（見Error!Error! ReferenceReference sourcesource notnot found.found.），其圓角半徑r按0規(guī)定。 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confiden

14、tial第7頁, 共44頁 Page 7 , Total 44圖 2 平板件的尖角示意圖表 1 平板件圓角半徑r r值材料厚度 t 0.30.30.50.5112233圓角半徑r0.20.30.511.50.5t1.1.3. 零件上止裂孔、工藝槽要求當(dāng)設(shè)計文件或圖樣上注明允許開止裂孔或工藝槽口時，其止裂孔直徑和工藝槽口尺寸，按下列要求選擇：1、止裂孔直徑d（見圖3）不大于2t； 圖 3 止裂孔直徑示意圖2、工藝槽口尺寸L和b（見04）；當(dāng)t0.5mm時，1mmb1.5 t （如1.5t1，則b=1）；當(dāng)t0.5mm時，b=1mm。Lt+r+0.5b 密級：秘密DKBA2021-11-27華為機(jī)

15、密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第8頁, 共44頁 Page 8 , Total 44圖 4 工藝槽口示意圖1.1.4. 彎曲零件未注圓角R要求當(dāng)圖樣上未注明彎曲半徑時，允許按內(nèi)彎曲半徑R不大于t（t為材料厚）且最小值為0.2。1.1.5. 翻邊攻絲質(zhì)量要求1、普通翻邊高度H值和螺紋壽命滿足以下要求：圖 5 翻邊攻絲示意圖表 2 普通翻邊高度H值和螺紋最少反復(fù)打入次數(shù)螺紋規(guī)格板厚T翻邊高度H（公差+0.30）內(nèi)圓角R最大值最少反復(fù)打入次數(shù)0.81.8121.02301.22.230M31.52.4301.02.4301.22.630M41.530.330 密級：秘密

16、DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第9頁, 共44頁 Page 9 , Total 441.22.430M51.52.7302、 薄板連接用的帶錐臺翻邊攻絲 該翻邊攻絲孔用于薄板連接的場景，實現(xiàn)M3國標(biāo)沉頭螺釘在0.8、1.0mm板材上不凸出板面,使翻邊高度H值和螺紋壽命滿足以下要求圖 6 薄板連接用帶錐臺翻邊攻絲孔結(jié)構(gòu)示意圖表 3 薄板連接用帶錐臺翻邊攻絲孔翻邊高度H值和螺紋最少反復(fù)打入次數(shù)螺紋規(guī)格材料板厚 T翻邊后底孔內(nèi)徑D1(參考)翻邊高度 H（公差+0.20）沉頭孔大徑D3 (公差0.1)最少反復(fù)打入次數(shù)10006363160

17、16040040010001000圓孔直徑0.100.150.20-0.150.200.30-孔間距0.100.150.200.250.300.150.200.300.400.50孔邊距0.100.150.200.250.300.150.200.300.400.50直邊距0.100.150.200.250.300.150.200.300.400.50沖裁角度沖裁特征030030030-1.0030030-特征分類尺寸分類特征示意圖f 級(精密精度)m級(中等精度) 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第17頁, 共44頁 Pa

18、ge 17 , Total 44636316016040040010001000636316016040040010001000孔到折彎邊距離(1 次折彎)0.150.200.200.250.300.200.300.500.500.50直邊到折彎邊距離(1 次折彎)0.150.200.200.250.300.200.300.500.500.50孔間距0.200.250.250.300.40(2 次折彎)0.250.300.500.500.75折彎邊到折彎邊距離(2 次折彎)0.150.200.200.250.300.250.300.500.500.75直邊到折彎邊距離(3 次折彎)0.200.

19、250.250.300.400.300.400.500.751.00折彎邊到折彎邊距離(4 次折彎)0.250.300.300.400.500.300.400.500.751.00孔間距0.200.250.250.300.40成型特征(4 次折彎)0.300.400.500.751.00特征尺寸分類特征示意圖f 級(精密精度)m級(中等精度) 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第18頁, 共44頁 Page 18 , Total 44分類63631601604004001000100063631601604004001000

20、1000直邊到直邊距離(4 次折彎)0.200.250.250.300.400.300.400.500.751.00局部成型1010252563-1010252563-形狀尺寸0.150.200.30-0.200.300.50-局部成型位置尺寸0.150.200.200.250.300.200.300.500.751.00壓死邊長度0.15-0.30-壓死邊厚度0.20.3(無間隙)0-0-壓死邊厚度(有間隙)0.20-0.30-折彎角度成型特征0.50.50.50.50.51.01.01.01.01.0特征尺寸分類特征示意圖f 級(精密精度)m級(中等精度) 密級：秘密DKBA2021-11

21、-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第19頁, 共44頁 Page 19 , Total 44分類636316016040040010001000636316016040040010001000噴涂保護(hù)尺寸1.01.51.51.52.01.01.51.51.52.0絲印尺寸0.50.50.50.5-0.50.50.50.5-平面度(平面內(nèi)少量沖裁特征)0.30.50.81.530.50.81.535平面度其它特征(平面內(nèi)有成形、焊縫或密孔等特征)0.50.81.5350.81.5357說明：上表適用于厚度不大于1.5mm板材，大于1.5mm厚度的板材其公差可

22、酌情相應(yīng)增加30%左右；上表適用于冷軋板、鍍鋅板等常用板材，彈簧板等板材其公差可酌情相應(yīng)增加；沖密孔（通風(fēng)孔）尺寸公差可參照相應(yīng)沖裁尺寸公差放大；壓印、壓字、加強(qiáng)筋、線橋、凸臺、敲落孔、百葉窗等特征公差均可參照局部成形公差值；壓鉚螺母/螺柱/螺釘?shù)任恢贸叽绻钪翟谄涞卓椎奈恢贸叽绻钪祷A(chǔ)上加0.05；注示為的沖裁角度、折彎角度的尺寸分段分別指相應(yīng)特征沖裁短邊尺寸、折彎短邊尺寸數(shù)值分段；注示為的公差數(shù)值根據(jù)工序調(diào)整（先折彎后沖孔）可按沖裁孔間距標(biāo)注公差； 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第20頁, 共44頁 Page 20

23、 , Total 44注示為的平面度尺寸分段指平面內(nèi)最大對角線長度尺寸分段；直線度公差值可參照上表中的平面度公差值執(zhí)行；對于多于4折的折彎特征，其累積公差按每折加0.05的精度來處理；對于多于4折的折彎特征，可以提高其中某一折的尺寸精度，提高的精度值可參照1次折彎精度；對于上表中未列出的特征，其尺寸公差可參照相似/相近的特征公差來處理；1.3.3. 其它說明鈑金件尺寸及公差要求是指鈑金件成品尺寸及公差，即表面處理（鈍化、氧化、電鍍、噴涂等）后的尺寸及公差； 密級：秘密DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第21頁, 共44頁 Page 2

24、1 , Total 442.2.檢驗檢驗規(guī)則規(guī)則2.1.2.1. 檢驗類別檢驗類別2.1.1. 一般檢驗一般檢驗是指根據(jù)設(shè)計圖樣和工藝文件的規(guī)定，對鈑金沖壓件進(jìn)行的外觀檢驗、尺寸及公差配合檢驗及常規(guī)性能檢驗。外觀檢驗是依靠手摸、目測、光照反射、光照投影等方法對鈑金沖壓件的外觀進(jìn)行檢驗；尺寸及公差配合檢驗是采用工具、夾具、量具，以檢驗鈑金沖壓件的尺寸、形狀、位置公差；一般檢驗可按工藝文件要求或采用標(biāo)準(zhǔn)樣件作為對照判定的依據(jù)。2.1.2. 補(bǔ)充檢驗補(bǔ)充檢驗是指一般檢驗以外的檢驗。它包括硬度檢驗、磁性檢驗、彈性檢驗、滲透檢驗、無損探傷檢驗等。2.2.2.2. 檢驗原則檢驗原則鈑金沖壓件必須進(jìn)行首件檢

25、驗、巡回檢驗和驗收檢驗；鈑金沖壓件原則上只進(jìn)行一般檢驗；當(dāng)設(shè)計圖樣或其它技術(shù)文件有具體要求時，應(yīng)進(jìn)行補(bǔ)充檢驗；批量生產(chǎn)的鈑金沖壓件，按需要可進(jìn)行抽檢或全檢，抽檢的方法一般按GB 2828和GB 2829的規(guī)進(jìn)行；全檢一般僅檢驗主要部分（包括特定的外觀要求）。2.3.2.3. 檢驗規(guī)定檢驗規(guī)定沖裁、剪切零件的外形按最大尺寸處進(jìn)行測量；內(nèi)孔按最小尺寸處進(jìn)行測量；止裂孔直徑及工藝槽口尺寸，只在展開料時檢查，零件成形后不作檢查；加工后易變形，而在裝配時能重新恢復(fù)所需幾何形狀的零件，其尺寸和形狀誤差，可在裝配狀態(tài)下測量，在自由狀態(tài)下允許超出極限尺寸。 confidentiality level: con

26、fidentialDKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第22頁, 共44頁 Page 22 , Total 441.Contents1.1.TECHNICALTECHNICAL REQUIREMENTSREQUIREMENTS.28281.1.GENERAL REQUIREMENTS FOR APPEARANCE AND SURFACE.281.1.1.The burr surface is required to be inside the parts, as shown in Figure 1: .281.1.2.Blanked a

27、nd 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 Figure 2) with a radius (r) specified as Table 1. .281.1.3.If allowable as marked in design documents or drawings, stop holes or

28、 technical rabbets can be open according to the following hole diameter and rabbet size.291.1.4.Parts 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 0.2.291.1.5.Requirements

29、 for flanging-hole with thread：.291.1.6.Requirements for Riveting Quality .311.1.7.Exterior Requirements of parts.321.2.REQUIREMENTS FOR THE BURR OF SHEET-METAL PUNCHING PARTS.321.2.1.Definition of Burr Height：.321.2.2.Classifications of burr areas of structural parts .331.2.3.Requirements for the b

30、urr quality of sheet-metal punching parts.361.2.4.Requirements for the Slag of Sheet-Metal Punching Parts .371.2.5.Requirements for Tool Withdrawal Marks on Sheet-Metal Punching Parts.371.3.TOLERANCE REQUIREMENTS OF SHEET-METAL PUNCHING PARTS.381.3.1.Statement.381、TOLERANCES IN DRAWINGS, IF SPECIFIE

31、D, SHALL ALWAYS PREVAIL. .381.3.2.Tolerance Levels and Values.38Tolerance levels are classified into f and m. f allows lower tolerances than m.381.3.3.Remarks .432.2.INSPECTIONINSPECTION RULERULE.44442.1.INSPECTION CATEGORY.442.1.1.General Inspection.44 confidentiality level: confidential DKBA2021-1

32、1-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第23頁, 共44頁 Page 23 , Total 442.1.2.Supplementary Inspection.442.2.INSPECTION RULES.442.3.INSPECTION PROVISIONS.44 confidentiality level: confidentialDKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第24頁, 共44頁 Page 24 , Total 442.FiguresFigure 1 Burr of bends.28Figu

33、re 2 Taper angles of panel parts.28Figure 3 Diameter of stop holes .29Figure 4 Technical rabbet .29Figure 5 Schematic diagram for flanging-hole with thread .30Figure 6 Schematic diagram for flanging-hole with thread for thin sheet connected.31Figure 7 Riveting procedure .32Figure 8 Burr height of sh

34、eet-metal structural parts .32Figure 9 Identification of Class A and Class B Areas for outdoor cabinets .34Figure 10 Identification of Class A and Class B Areas for indoor cabinet.35Figure 11 Identification of Class A and Class B Areas for Subracks .35Figure 12 Handle bars and panel hardware for Cla

35、ss A and B .36Figure 13 Identification of Class A and Class B Areas of Boxes .36Figure 14 Height of chamfer.37 confidentiality level: confidentialDKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第25頁, 共44頁 Page 25 , Total 443.TablesTable 1 Radius (r) of taper angle.28Table 2 The data of height(H) and

36、Min removable times .30Table 3 The data of height(H) and Min removable times for flanging-hole with thread for thin sheet connected .31Table 4 Riveting parameters.31Table 5 Minimum pulling force borne by riveted points.32Table 6 Ultimate value of burr height (Unit: mm) .37Table 7 Tolerance levels an

37、d values .38 confidentiality level: confidential DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第26頁, 共44頁 Page 26 , Total 44Specifications for Sheet-metal Punching PartsScopeThis specification covers the general quality requirements and inspection rules for Huawei sheet-metal punching parts (before

38、 surface treatment).This specification applies to Huaweis all sheet-metal punching parts (before surface treatment). Reference 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

39、 quality requirements and inspection rules for sheet-metal punching parts.KeywordsAppearance, surface status, technical 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

40、 based on the following documents which are listed in order of priority: Huawei drawings, Huawei enterprise technical standards, telecommunications industry standards, China national standards, and international standards. Shall there be discrepancy between these documents, the document of the highe

41、st priority takes precedence.Among Huawei enterprise technical standards, specific product standards have higher priorities than general standards.Term & DefinitionFull SpellingChinese ExplanationClass A AreaCorner areas touchable by hands in the normal working position of products when delivere

42、d by sheet-metal suppliers; and areas specially required in design drawings.Class B AreaAreas except for Class A AreaBurrBurr on the cross section of finished products when blanking sheet metalHeight Of BurrBurr height on the cross section of finished products when blanking sheet metal confidentiali

43、ty level: confidential DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第27頁, 共44頁 Page 27 , Total 44Full SpellingChinese ExplanationLevel 1 SurfaceCritical surface represents the product appearance. Through this kind of decorative surface, you can directly see the major product appearance, including

44、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 front door of the cabinet.Level

45、 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 communications chassis) and radio frequency

46、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 not demanding on the surface quali

47、ty, 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 support, bundling rack, inner fra

48、me, and inner solder. Surfaces that not belong to level 1 and level 2 surfaces are level 3 surfaces. confidentiality level: confidential DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第28頁, 共44頁 Page 28 , Total 441. Technical Requirements1.1.General Requirements for Appearance and Surface1.1.1. The

49、burr surface is required to be inside the parts, as shown in Error! Reference source not found.:Figure 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 surf

50、ace is the outer surface of parts if L-shaped parts are slideways, and opposite to the above diagram.1.1.2. 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 0) with a r

51、adius (r) specified as Table 1.Taper angleTaper angleFigure 2 Taper angles of panel partsTable 1 Radius (r) of taper angleThickness (t) 0.30.30.50.5112233 confidentiality level: confidential DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第29頁, 共44頁 Page 29 , Total 44of materials Radius (r) of taper

52、angle 0.20.30.511.50.5t1.1.3. If allowable as marked in design documents or drawings, stop holes or technical rabbets can be open according to the following hole diameter and rabbet size.1、d, diameter of stop holes (as shown in 0), should be smaller than or equal to 2 t;Figure 3 Diameter of stop hol

53、es2、L and b, sizes of technical rabbets (as shown in 0);When t 0.5 mm, 1 mm b 1.5 t (if 1.5 t 1, b = 1)When t 0.5 mm, b = 1 mm.L t + r+0.5bFigure 4 Technical rabbet1.1.4.Parts formed by curving without a curving radius noted on the drawing can be made with an internally curving radius R no larger th

54、an t (thickness of materials) and no smaller than 0.2.1.1.5.Requirements for flanging-hole with thread： confidentiality level: confidential DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第30頁, 共44頁 Page 30 , Total 441、Requirements for height(H) and Min removable times of flanging (as shown in 05) Fi

55、gure 5 Schematic diagram for flanging-hole with threadTable 2 The data of height(H) and Min removable timesThreadPlate thickness(T)Inner diameter of flanging-hole(D1)High of flanging-hole(H)(Tolerance 0+0.3)Max. RMin removable times(Time)0.81.8121.02301.22.230M31.52.52.4301.02.4301.22.630M41.53.3330

56、1.22.430M51.54.22.70.3302、 Flanging-hole with thread for thin sheet connectedThe flanging-hole is used in thin sheet connected, 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 o

57、f flanging (as shown in 06). confidentiality level: confidential DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第31頁, 共44頁 Page 31 , Total 44Figure 6 Schematic diagram for flanging-hole with thread for thin sheet connectedTable 3 The data of height(H) and Min removable times for flanging-hole with t

58、hread 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 flanging-hole D3 (Tolerance0.1)Min removable times(Time) 1000 63631601604004001000 1000Hole diameter0.100.150.20N/AN/A0.150.200.30N/AN

59、/ADistance between two holes0.100.150.200.250.300.150.200.300.400.50BlankingDistance between a hole and an edge0.100.150.200.250.300.150.200.300.400.50 confidentiality level: confidential DKBA2021-11-27華為機(jī)密，未經(jīng)許可不得擴(kuò)散 Huawei Confidential第39頁, 共44頁 Page 39 , Total 44Distance between a line and an edge0

60、.100.150.200.250.300.150.200.300.400.50Blanking angle 030030030N/AN/A1.0030030N/AN/ALevel f (High Precision)Level m (Average Precision)CharacteristicDiameter, Distance, or AnglePicture 636316016040040010001000 63631601604004001000 1000Distance between a hole and a bent flange(one bend)0.150.200.200.250.300.200