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reasons for the band sawing machine to cut oblique work pieces

A brief analysis of the reasons for the band sawing machine to cut oblique work pieces

When the sawing machine is sawing the work piece, it is inevitable that the work piece will be cut obliquely. In the sawing failure, the oblique cutting is a relatively common problem.

We often say that the cut is skewed, which means that the cut surface of the material is skewed during the sawing process, which is caused by the band saw blade being not perpendicular to the material when cutting. At this time, if the band saw blade is removed, it is usually found that the saw blade is in an “8”-shaped reversal state, and the teeth of the saw blade are in a state of wear or partial wear.

The reasons that affect the oblique cutting of the band saw blade can be roughly analyzed from four aspects:

Improper selection of sawing parameters
The effect of saw attachments and settings
Saw blade problem
Influence of the cutting material itself

Improper selection of sawing parameters
1. The set feed rate is too high
2. Improper selection of feed pressure

The effect of saw attachments and settings
1.The distance between the guide arms is too large, and the saw blade is easily deformed under the action of stress, resulting in oblique cutting. The spacing of the guide arms should be about 40mm wider than the width of the material to be cut.
2.Poor contact or wear of guide block and guide arm.
3.The vise is not clamped, the jaw surface is bad.
4.Not enough tension
5.Band saw blade running erratically
6.The verticality of the saw blade of the machine tool is not adjusted properly, adjust the verticality to 0-0.04mm
7.The material feeding frame and the jaws are not on the same level, pay attention to adjust the level of the front end of the feeding frame and the jaws, and the rear end is higher than
8.The gap between the back pressure wheel is too large or abnormal wear causes unstable cutting. Adjust the gap between the back pressure wheel and the saw back to 0-0.05mm
9.Insufficient supply of cutting fluid, resulting in early passivation of tooth tips
10.The wire brush is not used or the contact position is poor

Saw blade problem
Band saw blade used exceeds wear limit

Influence of the cutting material itself
1.The material has hard spots or surface hardening, causing the blade to slip and cut diagonally.
2.Material irregularities affect pinching.

When encountering the problem of oblique cutting of the band saw blade, you can check the above influencing factors and make appropriate adjustments, which can effectively solve the problem of oblique cutting and optimize the sawing effect.

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