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摘要
随着机械加工工业的飞速发展,对提高加工效率和改善劳动强度的要求已经越来越高,对于各式各样的结构复杂的工件,普通的机床夹具已经不能满足其加工要求。因此结合现状,为了适应某一工件的某一工序加工的要求而专门设计制造的专用夹具便应运而生,本次设计为连杆铣槽专用夹具。它针对连杆的结构特点,采用了“一面两孔”的定位方案,以支承板、圆柱销、削边销为定位元件。使工件安装方便,且能保证加工精度。压紧装置以杠杆原理为核心,双压板压紧工件,同时采用联动机构,左侧压板压紧之后右侧自动压紧。引用液压系统为夹紧动力源,降低了工人的劳动强度。采用三个工件平行加工方案,使加工三个工件的机动时间合为一个,提高了工作效率。
关键词:定位、夹紧、液压
全套图纸,加153893706
Abstract
With the machinery of the rapid development of processing industries, to enhance efficiency and improve the processing of labor intensity has been increasing demand for a wide range plex structure of the workpiece, ordinary machine fixture has been unable to meet its processing requirements. So with the status quo, in order to meet a certain part of a process of processing the request of the specialized design and manufacture of special fixture e into being, such as connecting rod mill slot dedicated fixture. It is aimed at connecting rod of the structural features and adopted the "one-two" targeted programmes to ensure that the workpiece be processed on the location accuracy, more convenient installation of the workpiece, assisted by a short working hours. At the same time adding a higher degree of automation of hydraulic clamping system, reducing the labor intensity of the workers. Three parts used in parallel processing programmes, to enable the processing of the three parts of a mobile time and improve work efficiency. In short, with the fixture for the use and further improvement can effectively shorten the process time to meet the evolving needs of production.
Key words: positioning, clamping, hydraulic
第一章概述
机床夹具通常是指装夹工件用的装置:至于装夹各种***用的装置,则一般称为“辅助工具”。辅助工具有时也广义地包括在机床夹具的范围内。按照机床夹具的应用范围,一般可分为通用夹具,专用夹具和可调整式夹具等。
通用夹具是在普通机床上一般都附有通用夹具,如车床上的卡盘,铣床上的回转工作台,分度头,顶尖座等。它们都一标准化了,具有一定的通用性,可以用来安装一定形状尺寸范围内的各种工件而不需要进行特殊的调整。但是,在实际生产中,通用夹具常常不能够满足各种零件加工的需要;或者因为生产率低而必须把通用夹具进行适当的改进
;或者由于工件的形状,加工的要求等的不同须专门设计制造一种专用夹具,以解决生产实际的需要。
专用夹具是为了适应某一工件的某一工序加工的要求而专门设计制造的,其功用主要有下列几个方面:
,例如与其他表面间的距离精度,平行度,同轴度等。对于