Reamer uses and types
Reamer uses and types
1. Purpose
A reamer is a rotating tool with one or more teeth that is used to cut away the thin metal layer on the machined surface of the hole. The hole after reaming can obtain precise size and shape.
The reamer is used to ream holes that have been drilled (or expanded) on the workpiece, mainly to improve the machining accuracy of the hole and reduce its surface roughness. It is a tool used for finishing and semi-finishing of the hole. , the machining allowance is generally very small.
Reamers used to process cylindrical holes are more commonly used. The reamer used to process tapered holes is a tapered reamer, which is less commonly used. According to the usage, there are hand reamers and machine reamers. Machine reamers can be divided into straight handle reamers and tapered handle reamers. The one for hand use has a straight handle.
2. Type
The reamer structure is mostly composed of the working part and the handle. The working part mainly functions as cutting and calibration, and the diameter of the calibration point has an inverted taper. The handle is used to be clamped by the fixture, and can be divided into straight handle and tapered handle.
Reamers can be divided into many types according to different uses, so there are many standards for reamers. Some of our more commonly used standards are GB/T1131 hand reamers, GB/T1132 straight handle machine reamers, and GB/T1139 straight handle reamers. Shank Morse cone reamers and more. Reamers are divided into hand reamers and machine reamers according to the way of use; they are divided into cylindrical reamers and conical reamers according to the reaming shape (standard cone reamers include 1:50 taper pin reamers and Morse taper reamers) Two types of knives). The direction of the chip flute of the reamer includes straight flutes and spiral flutes. The commonly used material is high speed steel. Carbide inserts. The general material of hand reamers is alloy tool steel (9SiCr), and the material of machine reamers is high-speed steel (HSS). Machine reamers are divided into straight handle machine reamers and tapered handle machine reamers.
Reamer accuracy includes D4, H7, H8, H9 and other accuracy levels. According to the shape of the reaming hole, it is divided into three types: cylindrical, conical and stepped; There are two ways to install the clamp: handle type and set type; According to the shape of the tooth groove, it is divided into two types: straight groove and spiral groove.
