Apply the MQ8240 crankshaft to grind the connecting rod neck of the crankshaft. Before each machining, firstly, the vertical and horizontal templates are used to rough the position of the connecting rod neck, so that the center line of the journal is as close as possible to the head of the grinding machine. The centerline of the frame and the tailstock are coincident, and then the journal is accurately corrected by the dial gauge, and the offset of the journal position is controlled within the grinding margin. The horizontal template calibration is appropriate, and the horizontal position offset of the journal can be controlled within 0.5mm, which can greatly shorten the time of using the dial gauge to fine-tune the connecting rod neck and improve production efficiency. Therefore, improve the original
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