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炉胆顶(图1)与“S”下脚圈(图2)是立式锅炉的重要零件。材料为20g。其特点是板料较厚,直径较大,内径偏差、椭圆度、平面度要求较高。过去制造多采用分别下料加热拉延的加工方法供坯。这不仅费工费料,而且两件在与炉胆组装时的对接质量也难以保证。为此,我们厂设计了一付成组冲压模具,把炉胆顶与“S”下脚圈归并成组(图3),一次加热冲压成形,然后气割分开。实践证明,技术经济效果良好。
The furnace top (Figure 1) and the “S” lower leg (Figure 2) are important parts of a vertical boiler. The material is 20g. It is characterized by thicker sheet, larger diameter, diameter deviation, ovality, flatness higher. In the past to create more use of separate blanking heating processing method for blanking. This is not only a waste of effort, but also the two pieces in the assembly with the furnace when the quality of the connection is difficult to guarantee. To this end, our factory designed a group of a group of stamping die, the top of the furnace and the “S” under the foot into a group (Figure 3), a heated stamping, and gas cutting separately. Practice has proved that technical and economic effects are good.