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为了测量S 195主轴瓦的外径(技术条件为:在自由状态下,外圆最大和最小直径的平均值分别为φ78.055mm和φ78.035mm。圆度要求为0.002mm,圆柱度要求为0.003mm), 因原测头的量程范围受到限制,我们在QFP型浮标式气动量仪上配装自制的气测头,取得良好的效果。气测头的结构如图1所示。当压缩空气进入浮标量仪后经联接管1进入角尺形气测头的竖直气孔2至水平气孔5,然后反冲回喷嘴小孔6(φ1.8mm),与被测工件形成气流间隙,此时气量仪上浮标的位置即为测得值。测量时,将被测件装在测量夹具上(见图2)。被测件3放置在夹具座1的支承2上,
In order to measure the outer diameter of the S 195 main bearing, the technical conditions are: under the free state, the average value of the maximum and the minimum diameter of the outer circle is respectively φ78.055mm and φ78.035mm, the requirement of roundness is 0.002mm, the requirement of cylindricity is 0.003 mm), due to the limited range of the original probe, we equipped the QFP-type buoy pneumatic meter with a homemade gas probe, and achieved good results. Gas probe structure shown in Figure 1. When the compressed air enters the buoyant gauge, it enters the vertical air hole 2 of the angle-shaped gas probe through the connecting pipe 1 to the horizontal air hole 5, and then recoil back to the nozzle hole 6 (φ1.8mm) to form the airflow gap with the tested workpiece, At this time, the position of the buoy on the gas gauge is the measured value. Measurement, the DUT installed in the measuring fixture (see Figure 2). The DUT 3 is placed on the support 2 of the fixture base 1,