How do you choose the tolerance of reaming when reaming?
Suggest you see. The worker's Manual of cutting! The cutter head is on.
The processed reamer size with many factors, such as what the coolant, cutter speed, feed rate, exit reamer also pay attention to.The standard reamer is generally the axis system size. Such as H8, H7, H6. Of course, also can according to the hole size to build special dimensions and tolerances of the reamer.The theory of pore size is negative to wring size zero. But the actual wring hole must be more than theory. General tolerance of hole is smaller, the precision is higher.The general processing speed is slower, the cooling liquid, fully feed more quickly, the size of the hole is out of tolerance near.High strength high speed steel and hard alloy can be used as tool materials when reaming high strength steel and ultra high strength steel. High speed, high cobalt, cobalt or aluminium containing high speed steel in high performance high speed steel is very suitable for processing this kind of steel. For example, a reamer made of cobalt carbide super high speed steel W12Mo5Cr4V3Co5Si is 18mm in diameter,When reaming high strength steel (b=1200 to 1300MPa), each reamer can be reamed with 60~70 holes. When the hinge is n=140r / min, f=0.05mm / R, the roughness is Ra, 1.6gm.Carbide reamers for high strength steel, shown in Figure 4-4, are made of YT15 carbide. The reamer for L/D is less than or equal to 5 and D=6 to 80mm hole. Full use of emulsion when in use. If a drill bush is used, the rotary drill sleeve must be used to avoid the friction between the hinge blade and the drill sleeve. When the operation, the first contact with the workpiece after the tool and then drive, the best time to stop the car when the knife is returned.
The processed reamer size with many factors, such as what the coolant, cutter speed, feed rate, exit reamer also pay attention to.The standard reamer is generally the axis system size. Such as H8, H7, H6. Of course, also can according to the hole size to build special dimensions and tolerances of the reamer.The theory of pore size is negative to wring size zero. But the actual wring hole must be more than theory. General tolerance of hole is smaller, the precision is higher.The general processing speed is slower, the cooling liquid, fully feed more quickly, the size of the hole is out of tolerance near.
