用球形测刀在万能工具显微镜上测量大模数蜗杆的齿形误差

• 作 者: 朱泉
• 机 构: 风雷机械厂工装车间,
• 出 处: 计量技术
• 发表日期: 1980年05期
• 关键词: 齿形误差 大模数 万能工具显微镜 顶尖轴 磨削过程 轴切面 逐点测量 投影方法 坐标数据 测量方法

一般机械厂对大模数蜗杆齿形误差的测量,是在万工显上进行的。由于阿基米德型蜗杆,在轴切面上齿形是直线,因此测量方法一般采取在轴切面上进行。显然,用直接投影方法,是不能获得轴切齿形轮廓。而用万工显的附件测量刀时,又因齿形长于测刀及因齿形在磨削过程中由于砂轮相干而形成凸度(往往在磨削齿型时根据初磨后测得的齿形误差结果情况重修整砂轮型面,直至磨削合格为止),所以用测量刀很难测出正确的齿形误差。有些单位采用光学灵敏测杆进行测量,其方法:<一>装上灵敏测杆,用测刀找出测球中心使之叠合在顶尖轴心水平位置上。<二>顶好蜗杆,进行按直角坐标逐点测量,记录各点坐标数据。<三>整理数据,算出齿形实际误差值。<详见《计量工作》1975年第5、6期《在万能 General Machinery Factory on the large-modulus worm tooth-shaped measurement error is significantly on the million workers carried out. Due to the Archimedes worm, the profile of the tooth is straight on the axis of the section, so the measurement method is generally taken on the axis of the section. Obviously, with the direct projection method, it is impossible to obtain a shaft-cut toothed profile. However, when the utility model is used to measure the knife, the tooth shape is longer than the measuring knife and due to the tooth profile, the crown is formed due to the coherence of the grinding wheel during the grinding process Shape error results re-grinding grinding wheel surface until the grinding up to date), so it is difficult to measure with a measuring knife the correct tooth-shaped error. Some units using optical-sensitive rod measurement, the method: fitted with a sensitive rod, with a knife to find the center of the ball so that it is superimposed on the top axis of the horizontal position. <2> top good worm, according to Cartesian coordinate point by point measurement, record the coordinates of the data points. <3> Arrange the data and calculate the actual tooth error value.