A brief introduction on the sheet metal blanking and piercing dies is presented in Chapter 21. In practice component is produced essentially by combinations of blanking, piercing, bending or drawing operations in a certain order. The dies discussed previously are involved in carrying out only a single operation. But the most practice dies have to do more than one operation for making a finished component. In this chapter, the details of the design of such dies are discussed.

在21章簡明扼要的介紹了落料模和沖孔模。實(shí)際組成成份的本質(zhì)是在特定工序中落料模、沖孔模、彎曲?；蚶L圖操作的組和。以前的模具討論只涉及到執(zhí)行單一的操作。但是為了完成結(jié)構(gòu),許多實(shí)際的模具不得不做更多的操作,在這一章,將討論這種模具的設(shè)計(jì)細(xì)節(jié)。
22.1模具類型
鈑件模具可以廣泛的分為三類：連續(xù)沖模、復(fù)合模，組合模。
連續(xù)沖模
在壓力機(jī)壓力下,連續(xù)沖模在單沖程下同時(shí)進(jìn)行兩個(gè)或更多的操作。因此完整的沖裁是獲得每一單沖程的操作,執(zhí)行單沖程中的每一步操作叫做工序。毛坯條從這個(gè)工序移動(dòng)到另一個(gè)工序并經(jīng)受特殊的操作。當(dāng)條料最終完成最后一道工序,一個(gè)完整的結(jié)構(gòu)已經(jīng)完成。