Tool grinding and grinding a big difference, workers grinding mill is purely a manual grinder through processing. And the technical requirements of the operator will be higher than ordinary grinding. Other factors such as the extent of grindstone particle size selection and trimming, the amount of feed, and so on, are the need to rely on the experience of the operator to determine.
Grinding tools are generally divided into three categories, roughing, finishing and clear corner.
The kibble is usually chosen 46 # grain grinding wheel china, is to cut the workpiece grinding to the required size, to achieve the desired flatness and finish can be.
The fine grinding usually use 100 # or 120 # wheel, in addition to the fine grinding plane, sometimes you have to grind the trough. Shape retention property of the grinding wheel also has a higher requirements.
Clearance angle is about 320 # dedicated wheel dressing to a thin thickness, such as 0.02mm, and then cut out groove, and then be trimmed, the bottom diameter of the groove will need to be flushed to R0.03mm
These three processes require skilled operator operating techniques, so that it enables grinding to achieve the best results.
Due to the dramatic friction of the grinding zone temperature is very high. This will cause the workpiece to produce stress and deformation, and even cause surface burns. Grinding injected a large amount of coolant to reduce the grinding temperature. The coolant also played the role of chip removal and lubrication.
The radial force in the grinding greatly. This will cause the machine - grinding wheel- workpiece system flexibility concession, the actual depth of cut is less than the nominal depth of cut. Grinding to be completed should not feed for light grinding to eliminate errors.
Blunt of abrasive grinding, grinding force also increases, resulting in broken or come off abrasive, re-exposed sharp edge, this feature is called "self-sharpening". Self-sharpening grinding normally carried out within a certain time, but should be carried out over a certain time after the manual trimming to avoid grinding force increases caused by vibration, noise and damage to the workpiece surface quality.
Since the cutting wheel abrasive itself has a high hardness and heat resistance, so grinding can be processed very high hardness of the material, such as hardened steel, carbide, etc..
Grinding wheel and grinding characteristics determine the differences of the grinding process. If ap = 0.001 ~ 0.005mm; grinding at high speeds, up to 30 ~ 50m / s, when the grinder is suitable for hydraulic transmission. The grinding can be quickly and economically obtain a high machining accuracy and a small surface roughness. Because of this, the finishing of the various parts should this procedure by grinding.