鈑金加工工藝教學(xué)教案(文件)
【正文】 amping to twist, often requiring subsequent straightening preferred design, shown in Figure 21B, virtually eliminates the tendency to twist, thereby reducing the number of die cost and manufactured scrap may also be it is not possible to keep the opposing flanges at the same height, it may be possible to form two pieces simultaneously in a symmetrical configuration by double attaching, as shown in Figure 21C, then separating Forming Limits The amount of stretch imparted to the metal must be within the safe region of the forming limit diagram for the guideline is best observed through close cooperation between ponent designers and die construction sources who have the capability to make reasonable estimates of actual all stretched areas fortably within the safe region virtually eliminates costly splits due to minor process variations during Trimming Operations Automotive sheet metal stampings are trimmed during fabrication to remove excess metal that is required for is generally acplished in a die that has an upper punch and lower die block of the same shape except for a trim clearance between clearance depends on the type and thickness of the sheet punch first stretches, then shears the metal when the punch and die block following guidelines should be followed to achieve the most efficient and least costly trimming to Permit Trimming in One Direction The ponent should be designed so that all trim angles are in the same plane as closely as possible.(See Figure 22)This will permit trimming in one direction and eliminate the need for added trim dies or for adding cams to trimming edges will remain in better condition, reducing manufactured Trim Walls Open Open trim walls permit trim shearing in a single operations for lower tool cost and less manufactured minimum of 10?is remended, as shown in Figure Sharp Trim Corners Sharp trim angles require a more plex trim steel arrangement, increasing die construction and maintenance minimum corner angle of 60?is remended, as shown in Figure Relief at Flanges The plastic flow of sheet metal during a flanging operation requires relief dimension of at least two metal thicknesses is required as shown in Figure preferred design is shown at this is not possible, notches should be provided as shown at condition at A should be Trim Notches Wide and Open Narrow trim notches with parallel side walls create difficult and costly die width should be a minimum of four times metal thickness, and sides should be a minimum of 5?open as illustrated in Figure ． 切邊 3． 達(dá)孔 4． 翻邊 5． 重整III． 節(jié)省模具和材料 1． 減少沖壓工序 減少不必要的細(xì)節(jié)。 3． 減少材料消耗 4． 哈哈 第四篇：鈑金加工工藝流程對于任何一個鈑金件來說,它都有一定的加工過程,工藝流程可能各不相同,主要有以下幾種方式: a． 、切角的，再轉(zhuǎn)沖床結(jié)合模具沖孔、． ,效率高,可減少加工成本,． ,． ,就是在一個較小的基孔上抽成一個稍大的孔,、,我們便可直接攻絲,、沖孔落料、沖凸包、沖撕裂、抽孔等加工方式,經(jīng)常用到的有壓鉚螺柱、壓鉚螺母、壓鉚螺釘?shù)?其壓鉚方式一般通過沖床或液壓壓鉚機(jī)來完成操作,其原則是對下一刀不產(chǎn)生干涉的先折,達(dá)到加工的目的或是單個零件邊縫焊接,:CO2氣體保護(hù)焊、氬弧焊、點焊、。其中需注意的就是對料件的保護(hù),若料件因劃碰傷而無法使用,需返工重做,會浪費(fèi)很多的加工工時,.第五篇：鈑金加工工藝流程鈑金加工工藝流程120080625 16:01隨著當(dāng)今社會的發(fā)展，鈑金業(yè)也隨之迅速發(fā)展，現(xiàn)在鈑金涉及到各行各業(yè)，對于任何一個鈑金件來說，它都有一定的加工過程，也就是所謂的工藝流程，要了解鈑金加工流程，首先要知道鈑金材料的選用。3．鍍鋅板SECC、SGCC。6．鋁型材；截面結(jié)構(gòu)復(fù)雜的料件，大量用于各種插箱中。１．檢查圖面是否齊全。５．外文圖的翻譯。三、展開注意事項，展開圖是依據(jù)零件圖（
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