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为了测量大直径内外径,我们研制了一种简易的检测仪,经过在1000mm直径的工件上使用,证明这种工兵使用简单,量值也较可靠.现简介如下: 如果知道弦长L或L’和h,就可以从下式D=(L~2/4h)+h式求得工件的直径D,见图1。根据这个几何关系,我们制造了如图2所示的内外径检测仪,它由千分表1、紧圈2、螺钉3、量体4、顶杆5、触头6和定弦板7组成.为了使用方便,应将顶杆5做成长度差为1mm的多根,用于测量不同圆体的内外直径。使用时,用手把量具紧靠在圆柱面(或孔中),使AS或A’B’两条棱与圆轴向平行,触头6端点P和圆柱面接触,并使千分表头接触顶杆5.这样可根据千分
In order to measure large diameter inside and outside diameter, we developed a simple detector, after the use of 1000mm diameter workpiece, proving that this engineer is simple to use, the value is more reliable.Is briefed as follows: If you know the chord L or L ’And h, can be obtained from the following formula D = (L ~ 2 / 4h) + h formula diameter D, see Figure 1. According to this geometric relationship, we made the inner and outer diameter detector as shown in Fig. 2, which consists of dial indicator 1, tight ring 2, screw 3, measuring body 4, plunger 5, contact 6 and tuning plate 7. For ease of use, the ejector pin 5 should be made of a plurality of 1mm in length difference for measuring the inside and outside diameters of different circular bodies. When in use, close the measuring instrument to the cylindrical surface (or hole) by hand, so that the two edges of AS or A’B ’are parallel to the axis of the circle, the contact point P of the contact point 6 is in contact with the cylindrical surface, Touch the plunger 5. This can be based on a thousand points