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大型模具冷冲压1mm 以下的钢板时,往往只是刃口磨损或崩刃,整体损坏是很少的。因此可以采用刃口局部淬火。过去用火焰喷咀在刃部连续加热淬火,这种方法在淬火的开始点和终止点的联接处产生回火软带,其宽度可达5～10mm,硬度较低,使用中过早磨损失效。我们使用双喷咀火焰淬火解决了这一难题,具体工艺方法如下:1.使用大号气焊喷咀两个(见图)在需要淬火的刃口同时由 A 点加热,当表面加热到淬火温度后,同时缓缓向两侧移动,加热后同时用两个喷水管冷却淬火。两个喷咀同时向 B 点移动加热,两个喷水管分别跟随喷
Large die cold stamping 1mm below the plate, often only the edge wear or chipping, the overall damage is very small. So you can use the edge of the local quenching. In the past with a flame nozzle in the blade for continuous heating quenching, this method at the start of the quenching and the termination of the joint tempering soft zone, the width of up to 5 ~ 10mm, lower hardness, the use of premature wear failure . We use dual-nozzle flame quenching to solve this problem, the specific process is as follows: 1. The use of two large nozzle gas jet (see photo) in the need to quench the edge simultaneously heated by A, when the surface heated to quenching temperature After that, while slowly moving to both sides, after heating with two water pipes quench cooling. Two nozzle at the same time move to the B point heating, two water pipes were followed by spray