Cleaning of the Saw Blades, Clamping the Saw Blades into the Frames, Cutting

Cleaning of the Saw Blades

It is important to perform preventative cleaning on the tools, preferably after every regrinding. Impurities on the tool distort the inspection of the state of the teeth, they foul the grinding disk, in extreme cases impurities are capable of totally putting the tool out of order (buildup lowers the effectiveness of the setting-beetling- stelitte weld-on, they cause greater friction in the cut).

For cleaning, it is best to use special cleaning products that are designed for this purpose. If this is not possible, then it can be substituted with a mix of oil and diesel, petrol, temporarily with a paint thinner or trichloretylene.

During Work

Clamping the Blades Into the Frame

It is always necessary to perform the clamping of the tools in accordance with the instructions of the machine's (stretching force) and only while using the original (not extended) clamping lever. The tightening by the lever is always done by a single worker, because these levers are designed this way during their production (1man, about 90 kg).

During cutting, the blades heat up as a result of friction and the tool starts to thermally expand. This is corrected by inspection and possible gentle tightening after a certain amount of cutting time (it varies, usually is around 30 - 45 minutes, according to the cutting style). It is obvious, that if the blades heat up and expand by this method, then during cooling they again contract to their original position. Therefore, if there is a break during work, then it is necessary to loosen the couplings. If this is not performed, then there is a risk that the stretched saw will crack during cooling or will totally tear.

Cutting

The cutting itself is governed by the values stated by the manufacturer of the machine and by the knowledge and experience of the operator. The values of feed speeds are set according to the state and condition of the material that is to be cut.

For the total life expectancy of the saws it is not good to let them get totally dull from cutting. The grinder then does not have to grind off so much, apart from that dull teeth experience a significantly higher pressure than sharp teeth. Again, it is a frequent cause of cracking of saws in the teeth gaps and non-quality cut.

It is suitable to use the stellite saws to cut defrosted and barked wood. In the bark of the wood that is laying on the ground, there are trapped small rocks and sand which has a tendency to break off the tips of the teeth during cutting.

This can be partially prevented by defining, during production, the cutting of wood with bark and before the set of stellite tipped teeth there is made several teeth without stellite weld-on (sharp) which function as pre-cleaning teeth (they enter into the wood first and thereby pre-clean the way for the teeth with the weld on). Nonetheless, the effect of this is not guaranteed.

 
 


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