我厂过去燜制鉚釘使用的模子如图1那样,由上模1、下模2和頂料杆3三个零件組成。这种燜头模的結構虽然簡單,但是由于上模和下模都是用高級优質鋼制成的整体模,浪費了很多鋼材,因而也增加了生产成本。这种燜头模使用一个阶段之后,就需要修理。在修理前,必須將模子退火,使它易于加工,而經过兩三次修理后,模子也就报廢了。为了节約工具鋼材,我們把鉚釘燜头模加以改进。它的結構如图2, Brazing rivets used in the past I use the mold as shown in Figure 1, the upper mold 1, the lower mold 2 and the top rod 3 composed of three parts. Although the structure of the stew die is simple, the upper die and the lower die are all made of high quality steel, which is a waste of a lot of steel and therefore increases the production cost. This stew die after using a stage, you need to repair. Before repairing, the mold must be annealed to make it easy to process. After two or three repairs, the mold is scrapped. In order to save tool steel, we improve the rivet head mold. Its structure shown in Figure 2,