Figure 1 is a schematic diagram of the left end of the front axle of the light passenger car of our factory. The diameter of the main pin hole in the figure is five kinds of φ48H8, φ38H8, φ35H8, φ32H8 and φ30H8 according to the product. There are also five kinds of main pin hole reamer, and All five reamers need to stock a certain amount of production stock, and in the front axle main hole machining, the reamer wears and can no longer be used after processing 25 front axles. Since there are about 6,000 front axles that we need to machine on average every month, if a kingpin reamer can process the front axle by 25 pieces, about 240 front reamer reapers are needed every month. If the used reamer is recovered, it will be sharpened to the first one.
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