Outer diameter measuring instrument for big size shaft type parts
A technology for shaft parts and measuring instruments, applied in the field of measuring tools, can solve the problems of error change, difficulty in measuring bow height and chord length, and error amplification, etc.
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[0018] Such as figure 1 As shown, a large-size shaft part outer diameter measuring instrument uses the measuring principle of the circular three-point touch method. It mainly consists of an open angle arm 1, a grating fixed length 5, a base 3, a top block 8, and a sleeve 4. , Locking bolt 9, signal processing circuit, single chip microcomputer, liquid crystal display (LCD) and other components. The section of the open angle arm 1 adopts a double-arc top concave structure. During measurement, the double-arc top of the open angle arm is adjusted to contact the outer diameter of the workpiece to ensure the perpendicularity of the open angle arm and the axis of the measured workpiece during measurement. The two opening angle arms 1 are symmetrically arranged under the base 3, and the opening angle arm 1 and the base 3 adopt a taper overfit fit, and the opening angle value is determined by the angle between the axes of the two cone holes on the base. The base 3 is vertically provide...
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