铸件内凹孔圆柱度测量装置的公理化设计

Axiomatic Design of Measuring Device on Cylindricity of Casting Internal Concave Hole

提出采用超声波测厚的间接测量方法来检测铸件内凹孔的圆柱度,以解决该类孔的无法直接测量的难题。利用公理化设计方法对测量装置进行了设计:根据装置的设计需求建立功能域,再由功能域映射到物理域,建立设计矩阵并进行解耦,确定最优的功能部件构成,然后对各部件进行结构设计,并制作了该装置。结果表明,测量装置可在φ10~φ90 mm的外径范围内实现精确测量,直线度误差在φ0.02 mm范围内,其结构紧凑,功能完备,有较高的可靠性,可在复杂测量条件下实现高精度测量。

An indirect measurement method of ultrasonic thickness was proposed to detect the cylindricity of the casting concave hole, so as to solve the problem that the holes can＇t be directly measured. The measurement device was designed by using axiomatic design method： device according to design requirements to establish function domain, and from the functional domain to the physical domain, the design matrix was established and decoupled, to determine the optimal feature, and structure design of the components, and produced the device. The results show that the measuring device can be used to accurately survey the axis with deep hole whose diameter is in diameter of 10 to 90 mm, the linearity error is within the range of 0.02 mm, it has compact structure, complete fimction and high reliability. High precision measurement can be realized under complex measurement conditions.