A three-coordinate measuring instrument can be defined as an instrument with a detector that can move in three directions and on three mutually perpendicular guide rails. The detector transmits signals in a contact or non-contact manner, and the three-axis displacement measurement system (such as an optical ruler) calculates the coordinates (x, y, z) of each point of the workpiece through a data processor or computer and measures various functions.
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Coordinate measuring machines are widely used in mold industry. It is a modern intelligent tool for design, development, testing and statistical analysis, and also an unparalleled effective tool for ensuring the quality and technology of mold products. At present, three kinds of coordinate measuring machines are bridge measuring machine, gantry measuring machine, cross-arm measuring machine and portable measuring machine. Measurement methods can be roughly divided into contact type and non-contact type.
If there is a deviation between the mold core cavity and the guide sleeve of the guide post, the deviation can be found out by coordinate measuring machine and corrected. After the mold core cavity profile is machined, many inserts and local curved surfaces are machined by electric pulse of electrodes, so the machining quality of electrodes and the quality of nonstandard curved surfaces become the key to mold quality.
Therefore, it is necessary to measure the electrode shape with CMM. CMM can use the input of 3D digital model to measure and compare the positioning, dimensions, related geometric tolerances, curves and surfaces of the finished mold with the digital model, output graphic reports, and intuitively and clearly reflect the quality of the mold, thus forming a complete inspection report of the finished mold. ?
Baidu encyclopedia-three coordinates