浮动锥销定位在工装设计中的应用

• 作 者: 周宛华
• 机 构: 芜湖一汽扬子汽车厂 241009
• 出 处: 机械工人.冷加工
• 发表日期: 1998年08期
• 关键词: 工装设计 定位件 削边 圆柱销 定位误差 位置度 转向节 角向 加工误差 中心距

在工装设计中“一面两销”定位是一种常见的形式,即以一平面、一圆柱销及一削边销为定位件。用削边销是为了避免过定位,但同时造成角向定位误差,这往往被忽略了。 以我厂生产的某转向节臂为例,见图1,工艺要求以2-φ14_(0.10)~(+0.30)mm孔及A面定位铣拳部两端面,保证尺寸6_0~(+0.5)mm、18.5mm、1.5mm及相应位置度要求,其中6_0~(+0.5)mm靠夹具保证。

In the tooling design “one side two pins” positioning is a common form, that is, a plane, a cylindrical pin and a trimming pin as the positioning member. The use of chamfered pins is to avoid over positioning, but at the same time to create angular positioning errors, which are often overlooked. Take a certain steering knuckle arm produced by our factory as an example, see Fig. 1, the process requires that the two end faces of the milling block are positioned with 2-φ14_ (0.10) ~ (+0.30) mm holes and A surface to ensure the size of 6_0 ~ (+0.5) mm, 18.5mm, 1.5mm and the corresponding position requirements, of which 6_0 ~ (+0.5) mm by the fixture to ensure.