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图1所示为大型客轮扶梯扶手的断面形状,材料为铝合金。由于目前没有这种型材的生产,我们就利用原有的一部小型冲床和一部简易的拉管机,设计了一副复合积木式拉模(图2),完成
Figure 1 shows the cross-sectional shape of large passenger escalator handrail, made of aluminum alloy. Since there is currently no production of such profiles, we have designed a composite building block drawing die using a small punch press and a simple pipe drawing machine (Figure 2)