【文章內(nèi)容簡(jiǎn)介】 字、加強(qiáng)筋、線橋、凸臺(tái)、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?值基礎(chǔ)上加177。 ；注示為① 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② 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；注示為③ 的平面度尺寸分段指平面內(nèi)最大對(duì)角線長(zhǎng)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(duì)于多于4折的折彎特征，其累積公差按每折加177。 的精度來(lái)處理；對(duì)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(duì)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(lái)處理；. 其它說(shuō)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；20 / 4321 / 432. 檢驗(yàn)規(guī)則. 檢驗(yàn)類別. 一般檢驗(yàn)一般檢驗(yàn)是指根據(jù)設(shè)計(jì)圖樣和工藝文件的規(guī)定，對(duì)鈑金沖壓件進(jìn)行的外觀檢驗(yàn)、尺寸及公差配合檢驗(yàn)及常規(guī)性能檢驗(yàn)。外觀檢驗(yàn)是依靠手摸、目測(cè)、光照反射、光照投影等方法對(duì)鈑金沖壓件的外觀進(jìn)行檢驗(yàn)；尺寸及公差配合檢驗(yàn)是采用工具、夾具、量具，以檢驗(yàn)鈑金沖壓件的尺寸、形狀、位置公差；一般檢驗(yàn)可按工藝文件要求或采用標(biāo)準(zhǔn)樣件作為對(duì)照判定的依據(jù)。. 補(bǔ)充檢驗(yàn)補(bǔ)充檢驗(yàn)是指一般檢驗(yàn)以外的檢驗(yàn)。它包括硬度檢驗(yàn)、磁性檢驗(yàn)、彈性檢驗(yàn)、滲透檢驗(yàn)、無(wú)損探傷檢驗(yàn)等。. 檢驗(yàn)原則鈑金沖壓件必須進(jìn)行首件檢驗(yàn)、巡回檢驗(yàn)和驗(yàn)收檢驗(yàn)；鈑金沖壓件原則上只進(jìn)行一般檢驗(yàn)；當(dāng)設(shè)計(jì)圖樣或其它技術(shù)文件有具體要求時(shí)，應(yīng)進(jìn)行補(bǔ)充檢驗(yàn)；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(yàn)主要部分（包括特定的外觀要求）。. 檢驗(yàn)規(guī)定沖裁、剪切零件的外形按最大尺寸處進(jìn)行測(cè)量；內(nèi)孔按最小尺寸處進(jìn)行測(cè)量；止裂孔直徑及工藝槽口尺寸，只在展開(kāi)料時(shí)檢查，零件成形后不作檢查；加工后易變形，而在裝配時(shí)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(cè)量，在自由狀態(tài)下允許超出極限尺寸。1. Contents1. TECHNICAL REQUIREMENTS.................................................28. GENERAL REQUIREMENTS FOR APPEARANCE AND SURFACE........................................................................................28. The burr surface is required to be inside the parts, as shown in Figure 1: .....................................28. Blanked and sheared panel parts’ taper angles with outer shapes and inner edges smaller than or equal to 90176。 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. .................................................................................................................................................28. 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...............................................................................29. 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 . ..............................29. Requirements for flanginghole with thread： .................................................................................29. Requirements for Riveting Quality ...................................................................................................31. Exterior Requirements of parts.........................................................................................................32. REQUIREMENTS FOR THE BURR OF SHEETMETAL PUNCHING PARTS .........................................................................32. Definition of Burr Height： ..............................................................................................................32. Classifications of burr areas of structural parts ..............................................................................33. Requirements for the burr quality of sheetmetal punching parts....................................................36. Requirements for the Slag of SheetMetal Punching Parts ..............................................................37. Requirements for Tool Withdrawal Marks on SheetMetal Punching Parts....................................37. TOLERANCE REQUIREMENTS OF SHEETMETAL PUNCHING PARTS..............................................................................38. Statement...........................................................................................................................................38 TOLERANCES IN DRAWINGS, IF SPECIFIED, SHALL ALWAYS PREVAIL. ................................................................................38. Tolerance Levels and Values ............................................................................................................38Tolerance levels are classified into f and m. f allows lower tolerances than m...............................................38. Remarks ............................................................................................................................................432. INSPECTION RULE........................................................44. INSPECTION CATEGORY .....................................................................................................................................................44. General Inspection............................................................................................................................4423 / 43. Supplementary Inspection.................................................................................................................44. INSPECTION RULES.............................................................................................................................................................44. INSPECTION PROVISIONS ....................................................................................................................................................442. FiguresFigure 1 Burr of bends......................................................28Figure 2 Taper angles of panel parts ...........................................28Figure 3 Diameter of stop holes ..............................................29Figure 4 Technical rabbet ...................................................29Figure 5 Schematic diagram for flanginghole with thread .........................30Figure 6 Schematic diagram for flanginghole with thread for thin sheet connected......31Figure 7 Riveting procedure .................................................32Figure 8 Burr height of sheetmetal structural parts ...............................32Figure 9 Identification of Class A and Class B Areas for outdoor cabis .............34Figure 10 Identification of Class A and Class B Areas for indoor cabi..............35Figure 11 Identification of Class A and Class B Areas for Subracks ..................35Figure 12 Handle bars and