论文部分内容阅读
一、前言 我国缸套行业生产中对缸套外径的测量一般都用传统的外径千分尺,此法对湿式缸套可行,对薄壁干式缸套尚不完全适用,尤其缸径在Φ100以上且壁厚约2mm的干式缸套,因其径向刚性很差,虽然外径千分尺测量压力仅仅几牛顿,缸套仍产生弹性变形,不同部位的测量变形量约10—40 μm不等,几乎无法判读。（用内径量缸表测这类缸套内径时亦然,约胀10—40 μm不等。）由于干式汽缸套外径尺寸为测量截面内任意两相垂直测量尺寸的算术平均值,若缸套呈椭圆形则所测值就更加不准了。用比较法测量外径的周长来测量外径,便是一种新途径。 目前国外有些缸套生产厂家已采用比较法测周长,然后换算为直径。并可通过壁厚测量,计算出它的内孔直径。国外牵引钢丝的动力一般为气动。钢丝的轴向拉力为250～300牛顿。我们吸取国外先进技术,于86年底至87年7月研制成一台手动薄壁缸套外径检测仪,见,
First, the foreword China’s cylinder liner industry in the production of the outer diameter of the cylinder are generally measured with a traditional micrometer micrometer, this method is feasible for wet liner, thin-walled dry liner is not yet fully applicable, especially in the bore above Φ100 and the wall Thick dry cylinder liner 2mm, because of its poor radial rigidity, although the outer diameter micrometer pressure measurement is only a few Newtons, the cylinder liner is still elastic deformation, different parts of the measured deformation of about 10-40 μm, almost impossible Interpretation. (With the inner cylinder diameter measuring cylinder diameter of this type is also the case, about expansion of 10-40 μm range.) As the outer diameter of the dry cylinder liner for the measurement of any two-phase vertical measurement of the arithmetic mean, Oval cylinder liner measured values are even more not allowed. It is a new way to measure the outer diameter by comparing the perimeter of the outer diameter. At present, some foreign cylinder manufacturers have adopted a comparative method to measure circumference, and then converted to diameter. And through the wall thickness measurement, calculate its bore diameter. The power of foreign traction wire is generally pneumatic. The axial tensile force of the wire is 250 ~ 300 Newton. We learn from foreign advanced technology, from the end of 86 to July 1987 developed into a manual thin-walled cylinder diameter detector, see,