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What is a reamer

by:WORKSITE     2020-06-11
The drill bit and the reamer are the same thing, but they play different roles. They use the cutting edge for drilling; the drill drills the bottom hole, and the reamer enlarges the bottom hole of the drill. What are the specifications of the reamer 1. Good rigidity. Because the back of the reamer has a small amount of cutting knife and less chips, the chip flute of the reamer is shallow and narrow, and the diameter of the drill core is large, which increases the rigidity of the working part of the reamer. 2. Good orientation. The reamer has 3 to 4 cutter teeth, the number of edges around the cutter increases, and the guiding effect is relatively enhanced. 3. The chip condition is better. The reaming drill does not participate in cutting with a transverse edge. The cutting is light and quick, and a large feed rate can be used, which has a high productivity; and because the chip is less, the chip removal is smooth, and the processed surface is not easy to scratch. Therefore, compared with drilling, reaming has higher machining accuracy and lower surface roughness value, and can correct the axis error of drilling to a certain extent. In addition, the machine tool suitable for reaming is the same as drilling. The difference between twist drill, reamer and reamer The reamer uses the side edge to cut, and the hole with low dimensional accuracy and hole wall finish drilled by the drill bit is twisted by the reamer, so that the accuracy and finish of the hole meet the requirements. Drill bit: Consists of drill tip, cutting edge and chip flute (spiral or straight flute), mainly used for workpiece hole processing without pre-cast holes, the processed holes generally have poor cylindricity and roughness; Reaming drill: It consists of cutting edge and chip flute (welding blade reaming drill), mainly used to enlarge the hole with pre-cast hole or bottom hole and improve the cylindricity and roughness, but the hole at this time is still not Can be used as a pin hole; Reamer: composed of cutting edge and chip flute (generally solid carbide), mainly used to improve the cylindricity and roughness of the bottom hole; It can be seen from the above that they are different in structure and processing accuracy.
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