煤油炉上的发火圈(图1),板厚0.5毫米,共有φ2孔眼312个,要求一次冲出。为满足这种工艺要求,采用了多冲头浮动冲模。它具有结构简单,制造容易,精度较高,维修方便等优点。模具结构及原理(见图2);将冲头2较松地装入冲头镶板3内,以利产生浮动。通过导向板4上的喇叭口,冲头因浮动原理便自动找正,冲入下模 Fire ring on the kerosene furnace (Figure 1), the thickness of 0.5 mm, a total of 312 holes φ2, requiring a run out. To meet this process requirements, the use of multi-punch floating die. It has the advantages of simple structure, easy manufacture, high precision and convenient maintenance. Die structure and principle (see Figure 2); the punch 2 loosely into the punch panel 3, in order to facilitate the production of floating. Through the flapper on the guide plate 4, the punch automatically finds its way due to the floating principle and rushes into the lower die