车床
an severely reduce the hot workability of steels, because of the formation of iron sulfide, unless sufficient manganese is present to prevent such formation. At room temperature, the mechanical
及毛坯尺寸如下: 1. 外圆表面沿轴线长度方向的加工余量及公差(φ 25,φ 55 端面)。 查《机械制造工艺设计简明手册》(以下称《工艺手册》)表 ~ ,取 φ 25,φ 55 端面长度余量均为 (均为双边加工) 铣削加工余量为: 粗铣 1mm 精铣 0mm 6 2. 内孔(φ 55 已铸成孔) 查《工艺手册》表 ~ ,取φ 55 已铸成孔长度余量为 3,即铸成孔直径为 49mm。
fectly match the external threads on the spindle (two things which almost never happen), an accessory must be used to mount a workpiece to the spindle. A workpiece may be bolted or screwed to a
工序的说明 CA6140 拔叉零件 的重要加工面有花键底孔、两端面,花键,槽,顶面,材料为 HT200,参考《机械制造工艺设计简明手册》,其加工方法选择如下: 加工 前后 两端面 根据 GB180079 规定毛坯的公差等级为 IT13,表面粗糙度为 m,要达到后 端面 m 的技术要求,需要经过粗铣→精铣。 加工 Φ 22 花键底孔 此工序重点在于找正毛坯对称面,故采用螺旋定心夹紧机构,找正对称面
stock can be fed through it. The size of this hole is an important size dimension of a lathe because it determines the maximum size of bar stock that can be machined when the material must be fed
Tool features have been identified by many names. The technical literature is full of confusing terminology. Thus in the attempt to clear up existing disorganized conceptions and nomenclature, the
achined when the material must be fed through spindle. The tailsticd assembly consists, essentially, of three parts. A lower casting fits on the inner ways of the bed and can slide longitudinally
析问题,解决问题;根据技术参数及相关要求,对机床连接座的工艺规程及机床夹具的初步设计,完成设计方案,达到预期的 目的;同时也是一次熟悉和查阅相关手册、图标、文献的机会,以及设计、计算、交合的系统化的演练。 二 .设计的主要环节或论文的基本内容 1. 设计的目的 ( 1) 锻炼我们综合运用所学的机械设计,制造及相关资料( 机械工艺学、机械设计基础、工程 力学)。 结合生产实习