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鋁型材百科

工業鋁型材挤压前挤压工具的准备工作有哪些?

鋁型材擠壓前擠壓工具的准備工作

鋁型材擠壓工具通常是指擠壓軸、擠壓筒、擠壓墊片。這些工具在生産前都有自己的准備工作。其中，重要的工作是調整好擠壓軸、擠壓筒、模具和送料機械手的中心。

工業鋁型材

鋁型材的擠壓軸與擠壓筒的中心允許偏差≤0.2mm，擠壓軸、擠壓筒、模具、送料機械手的允許中心偏差<1.5mm，一般要求在12mm以內。中心偏差太小，設備難以調整、控制。中心偏差太大，模具偏離中心會造成金屬流動不均，制品易産生壁厚不均、彎曲、扭擰等缺陷擠壓軸的直徑是根據擠壓筒的內徑來決定的，一般應比擠壓筒直徑小3~12mm，擠壓筒直徑小的取下限，大的取上限。

工業鋁型材擠壓軸的軸幹長應比擠壓筒的長度大15~25mm。擠壓軸的瑞面對軸中心線的不垂直度不得大于0.1mm。擠壓筒內襯(又稱內套)由于擠壓過程中不斷的摩擦會使擠壓筒內襯的工作部分逐漸變大，與非工作部分的直徑産生一定的偏差。當其偏差較大時需要更換擠壓筒的內襯。

工業鋁型材

更换工業鋁型材挤压筒的内衬需要热装，一般将挤压筒外层衬套加热至一定温度，使其尺寸热膨胀，然后将外径较外套内径稍大的内层衬套装入其中，待外衬套冷却后，由于收缩对内套产生预紧装配压应力，其方向与挤压时产生的张应力方向相反，因而大大降低了挤压时挤压筒内径的拉应力，提高了挤压筒的许用强度。

美誠鋁業作为一家专业的生产工業鋁型材的厂家，采用欧美进口挤压生产线生产，人工智能校验，终端检验一直到出厂，质量100%得到保障。

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