Camshaft grinding method

Abstract

The invention discloses a camshaft grinding method, a camshaft comprises a plurality of groups of cams, and the camshaft grinding method comprises the following steps that a first grinding program, a second grinding program and a third grinding program are set, and each of the three grinding programs at least comprises setting of an idle grinding initial diameter and an idle grinding feeding speed; a second grinding program is called, and grinding of the first camshaft is started; an idle grinding current value is detected, according to the detected idle grinding current value I1, one of the first grinding program, the second grinding program and the third grinding program is selected to grind the secondary cam shaft, or the machine is shut down to check the blank and confirm the quality of a grinding wheel; the first grinding program is suitable for the camshaft blank with the idle grinding current value deviating from the lower limit, the second grinding program is suitable for the camshaft blank with the idle grinding current value being the intermediate value, and the third grinding program is suitable for the camshaft blank with the idle grinding current value deviating from the upper limit. According to the method, different programs can be correspondingly adjusted according to the current idle grinding current value, and the grinding precision and quality of camshaft blanks of different sizes are met.

Description

technical field [0001] The invention relates to the technical field of grinding technology, in particular to a camshaft grinding method. Background technique [0002] The existing high-speed precision camshaft grinder sets the starting diameter and grinding process based on the finished product size and the standard size blank. Due to the fluctuation of the casting blank size, when the blank size is too large, it is easy to cause the collision between the cam and the grinding wheel, and the camshaft The phase quality of each cam group of the finished grinding product is unstable and there is a risk of poor quality outflow; the initial diameter of empty grinding and the grinding process are set based on the largest size blank. Although quality fluctuations and outflow problems can be eliminated, the grinding standard size and lower limit There are serious problems of technical process redundancy, waste of beats, and low production efficiency when processing rough blanks of di...

AI Technical Summary

Problems solved by technology

In the traditional camshaft grinding process, each set of cams is ground with the same set of parameters. When a set of cams that are farther away from the clamping drive side of the chuck is ground, the workpiece is distorted and deformed, and the phase error of the cams is greater. With the increase of the chuck distance, the phase error of each set of cams presents a step-like and gradually increasing deterioration trend, which seriously affects the fuel-saving performance and signal-to-noise ratio of the engine

[0004] Secondly, the dressing of the grinding wheel is carried out according to the fixed grinding times. When the number of dressing intervals is set too high, when the grinding force of the grinding wheel is insufficient, the grinding wheel is poorly dressed, and the hardness of the blank is too high, etc., the finish of the workpiece is likely to be out of tolerance, and precision grinding cannot be realized.

When the number of dressing intervals is set too low, the grinding wheel is wasted and the cost increases

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