设计任何工艺装备,不仅要求高效率和高精度地生产出零件,也要考虑是否经济。在大量生产中,工夹具的费用可以分摊到许多工件头上,所以问题不大;但在少量生产中,工夹具的设计就要力求省时、省料、省工。设计钻孔夹具和设计其他工夹具一样,都必须遵循一系列原则,除高效率和高精度外,还必须:操作、维修方便;耐用;少调整;工件互换性;标准化,等等。但在少量生产中,降低成本成了主要目标,上述原则有的必须摒弃,有的则不能过分强调。因为这种夹具生产的过程短,使用廉价材料就可以满足其寿命, Designing any process equipment not only requires the production of parts with high efficiency and precision, but also economy. In mass production, the cost of a jig can be spread over many workpieces, so there is little problem; but in a small amount of production, jigs and fixtures should be designed to save time, save money and save labor. Like the design of other fixture, the design of the drilling fixture must follow a series of principles. In addition to the high efficiency and precision, it must be: easy to operate and maintain; durable; less adjustment; workpiece interchangeability; standardization and so on. However, in a small amount of production, cost reduction has become a major goal. Some of the above principles must be abandoned while others can not be overemphasized. Because of the short process of producing such fixtures, inexpensive materials are used to meet their longevity,