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目前机械制造工厂中所采用的机床夹具有很多缺点,归纳起来有以下五方面:(1)由于现代机械制造的迅速发展和现有机器的不断改进,工厂生产的产品经常更换。在中小批生产类型的工厂中,当生产对象更换时,原有的专用夹具一般都无法重复利用。(2)大部分机床夹具都是采用手动的夹紧装置,结构较为陈旧,尤其在中小批生产条件下,夹紧工件的辅助时间很长,劳动生产率无法提高。(3)每一新产品均需设计制造大量的专用夹具,当产品改变时,专用夹具就废弃不用,造成人力、物力的浪费。(4)随着试制产品品种的增加,存放专用夹具的仓库面积越来越大,使工具管理工作复杂化。(5)夹具元、部件的规格化与
At present, machine tool clamps used in machinery manufacturing factories have many shortcomings, which can be summed up in the following five aspects: (1) Due to the rapid development of modern machinery manufacturing and continuous improvement of existing machines, the products manufactured by the factories are often replaced. In small and medium batches of production plants, when the production of the object replacement, the original special fixtures are generally not be reused. (2) Most machine tool fixtures are manual clamping device, the structure is relatively old, especially in the small batch production conditions, the auxiliary time for clamping the workpiece is very long, labor productivity can not be improved. (3) Each new product needs to be designed and manufactured a large number of special fixtures, when the product changes, the dedicated fixtures are discarded, resulting in the waste of manpower and material resources. (4) With the increase of trial product varieties, the warehouse area for storing special fixtures is getting larger and larger, which makes the tool management complicated. (5) fixture element, the normalization of parts and