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1.引言 快换夹头能够不用辅助工具快速更换孔加工和螺纹加工刀具。它们具有不同的结构形式,可以应用于单轴和多轴机床。但是在主轴间距太小时,由于快换夹头的外径较大,应用就受到限制。 2.问题的提出 在从事机械、缝纫机和电气设备的生产和在精密机械工业中,考虑到生产的合理性,经常使用多轴钻削动力头和多轴钻床。在这些机床上,5毫米以下的孔间距是毫不稀奇的,不过大多数孔间距均超过12毫米。一般情况下,钻削动力头具有直接安装弹簧夹头的孔,在弹簧夹头中紧固钻头和丝锥。图1示出这种夹头的布置形式。
1. Introduction Quick change chuck can quickly replace the hole processing and thread processing tools without auxiliary tools. They have different forms of construction and can be used in single- and multi-axis machines. However, when the spindle spacing is too small, the application is limited due to the large outer diameter of the quick change chuck. 2. PROBLEM PROBLEMS In the production of machinery, sewing machines and electrical equipment, and in the precision machinery industry, multi-axis drilling power heads and multi-spindle drilling machines are often used in consideration of production rationality. On these machines, hole spacings of up to 5 mm are not uncommon, but most of the holes are more than 12 mm apart. In general, a drilling power head has a hole to which a collet is directly attached, and a bit and a tap are tightened in a collet. Figure 1 shows the arrangement of such a chuck.