The stainless steel get hardened if not cut agressively. If the teeth does not cut and just trip on the workpiece it will heat up and hence get hardened. Excessive speed of bandsaw blade, blunt teeth, fine teeth form and low feed force are some of those causes.
Worn, mis-adjusted or missing chip brush will cause the chips go back to the workpiece and jam and stick in the gullets of the bandsaw blade hence the teeth form will be stripped.
Adjust the chip brushes to take the chips away.
Take the advice from the manufacturer itself. Obtaining the optimal tension on the bandsaw blade will enable a straight cut. On the other hand, existence of an excessive tension will cause fatigue, fracture; the wheels, bearings are damaged due to the excessive load and disrupt the finely adjusted bandsaw blade guides.
Extensometer is used for measuring the tension on the bandsaw blade.
The answer can be found in the nature of the problem.
E.g. if the cut is not straight or deflected, the cause is insufficient tension on the bandsaw blade or the excessive feeding force. The feeding control might not be calibrated or there is an excessive feed force on the blunt bandsaw blade.
The bandsaw blade might trip on the wheels or guides because of mis-alignment. The surface of the wheels, wheel bearings, wheel shafts, guides or bolts of guides might be worn or mis-aligned.
The electrical equipments might be damaged during the existence of voltage fluctuations at the night time.
If you will not run the machine for a long time, you better loose the bandsaw blade so that its life time will be longer.
The guides should be as much closer as possible. You can leave a small gap so that the clamping vises can open/close. To keep the guides as much closer as possible to the workpiece will prevent having uneven cuts due to the feed force. A very tiny excessive gap will even cause uneven cuts.
Check the operator’s manual of the machine. The oil with a wrong aniline level will damage the rings in the circuit and cause oil leakage. Wrong viscocity will cause insufficient pressure, over-heat furthermore damage on the pump.
The combination of several speeds of the bandsaw blade and the teeth forms can cause vibration. Using bandsaw blades with variable teeth form will lessen the probability of having vibration. On the other hand you might have to adjust the speed of the bandsaw blade though.
If the bandsaw blade is about to break-in or trip on the workpiece, then it will cause hi-level vibration. To break-in the material gently, decrease the speed of the bandsaw blade, increase the feeding force, replace the blunt bandsaw blade and use a bandsaw blade of which 6-24 teeth touch the workpiece during cutting.
Excessive feeding force will cause low level vibration. Increase the speed and decrease the feeding force. Make sure that min. 6 teeth touch the material.
The worn or mis-adjusted guides, wheel-bearings, shafts, bolts all are among the causes of vibration.
Excessive tension on the bandsaw blade and mis-adjusted guides are the common causes.
· Feeding force is the force exerted on the bandsaw blade which enables the bandsaw blade break-in the material.
· Feeding speed is the linear speed when the bandsaw blade breaks-in the material.
· Cutting rate/speed is the area cut per minute.
Generally the metal bands with teeth are used for such applications on the other hand there are some without teeth; those are used to cut soft materials or the materials with low density with a minimum loss of material. The ones with teeth with high-grit are used to cut ductile, hard and abrasive materials.
· If you are cutting wood, plastic, aluminum parts, then the best choice will be the carbon steel bandsaw blade.
· Bi-metal bandsaw blades are widely used to cut most of those steel and other metal parts. It will be the optimal choice if heat, abrasiveness and the chip are your concerns.
· If you are cutting very hard or very abrasive metal materials and non-metallic parts then you will be concerned with the heat and the abrasiveness then the best choice will be tungsten-carbide bandsaw blades.
These bandsaw blades are being manufactured using a narrow high speed steel and wider alloy steel welded by electron or laser beam. Bu testereler, dar yüksek hız çeliği şeridi ile daha geniş alaşım çeliğinin elektron veya lazer kaynağı ile kaynatılarak üretimine başlanmıştır. The teeth form is notched at high speed steel. Then the bandsaw blade will be having the heat and abrasiveness resistant teeth form and back with high life time.
Mostly, three types of high speed steel and six different teeth form are used to produce those blades and each type is used at a certain cutting application.
Mostly the number of teeth touching the workpiece to be cut should be min 6 and max. 24. To apply 3 teeth may lead to the stripped teeth. If applied more teeth then the cutting rate will reduce and will cause a lot of chips available in the gullet may cause the teeth to be stripped.
Check the teeth form. If less than 6 teeth are touching the part then the load will be high on the teeth. Then it may be stripped. If more than 24 teeth touch then the chips jam in the gullets which will again cause being stripped.
The chips coming back to the cutting area will jam in the gullets and results in being stripped. The cutting fluid must prevent the probability of the welding of the chips in the gullet and the chip brushes must be able to clean the gullets.
If the workpiece is not firmly fixed in the clamping vises, if it vibrates, the bandsaw blade will immediately be stripped.
Breaking-in the bandsaw blade will enable the honing, handling a sharp-edge and a longer life time.
To break-in the carbide bandsaw blades; reduce both the speed of the bandsaw blade and the cutting speed to their halves and start cutting. Increase both the speed of bandsaw blade and feeding force gradually but never allow the bandsaw blade vibrate.