Dispersive type band saw blade

Abstract

The invention discloses a dispersive type band saw blade. The dispersive type band saw blade is composed of a saw back portion and a saw tooth portion comprising a plurality of repeating units. The distance between tooth tops of two adjacent saw teeth of the saw tooth portion is the tooth diameter P, and the distance between the tooth top portion and the tooth root portion of saw teeth is the tooth height H. Each repeating unit comprises a first saw tooth, a second saw tooth, a third saw tooth, a fourth saw tooth and a fifth saw tooth, wherein the first saw tooth, the second saw tooth, the third saw tooth, the fourth saw tooth and the fifth saw tooth are sequentially and continuously arranged. Through change of the tooth height H and the tooth diameter P, chips are small and can be discharged easily, and cutting resistance is lowered. Through change of the tooth angle theta, cut-in performance of the band saw blade is improved, and therefore pressure on the back portion of the band saw blade from a back pressing block of a tool body can be lowered, the service life of the band saw blade can be prolonged, and the band saw blade is suitable for cutting various medium-diameter and large-diameter materials which are made of tool steel or stainless steel and difficult to cut.

Description

technical field [0001] The invention relates to a decentralized band saw blade. Background technique [0002] The machinability of stainless steel is much worse than that of medium carbon steel. Taking the machinability of ordinary No. 45 steel as 100%, the relative machinability of austenitic stainless steel 1Cr18Ni9Ti is 40%; ferritic stainless steel 1Cr28 is 48%; martensitic stainless steel 2Cr13 is 55%. Among them, the machinability of austenitic and austenitic + ferritic stainless steels is the worst. Stainless steel has the following characteristics in the cutting process: 1. Severe work hardening: Among stainless steels, the work hardening phenomenon of austenitic and austenitic + ferritic stainless steel is the most prominent. 2. High cutting temperature: the plastic deformation and the friction with the cutting tool are very large during cutting, and the cutting heat generated is much; coupled with the poor thermal conductivity of stainless steel (the thermal cond...

AI Technical Summary

Problems solved by technology

[0003] The traditional band saw blade has the same height at the tip of the tooth, the same amount of teeth on both sides, and the same tooth angle. The cutting of the above materials has the following disadvantages: the tip of the tooth is easy to wear, and the life of the saw blade is low; the affinity effect in the process of cutting stainless steel makes the tooth - Bonding occurs between chips, which causes bonding wear of the tool, and the hardness of the carbide (such as TiC) particles in stainless steel is very high. When cutting, it directly contacts and rubs with the tip of the tooth, which aggravates the wear, and the chips are complete, which is not easy Breaking, filling and sticking to the tooth groove during cutting, resulting in poor heat dissipation of the band saw blade, worsening cutting adjustment, and chips will also damage the processed surface

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