Causes of saw blade bending in stone cutting

Release date:2021-12-03 15:20:37Source:Linxing diamond toolsChecks:

The stone cutting process is divided into two parts. The first is block cutting and the splitting stage, and the other is slab cutting. Among them, the saw blade bending is rare in the slab cutting process, and most of the saw blade bending occurs in the block cutting. During the cutting process. Most factories in this cutting process will use diamond circular saw blade, including the older gantry cutting or bridge cutting. This kind of machine has gradually become the mainstream cutting method due to its simple structure, low price, and strong sawing mobility. Especially in the granite stone cutting process, almost 98% of stone factories will choose this cutting method.
One manifestation of slab bending in stone cutting is the flatness of the slab in the sawing length direction, which is called left and right bending. The specific manifestation is that the thickness of the left and right slab is different after the stone is cut. Another manifestation is the difference in the cutting surface of the saw blade, which is called up and down bending. Specifically, the thickness of the stone that has been cut by the saw blade varies from top to bottom.

At present, the experience of some stone factories is worth learning: When slab bending, appropriately reduce the cutting amount and increase the horizontal cutting speed; when bending occurs, appropriately increase the cutting amount to make the horizontal cutting speed lower. Therefore, in daily production management, it is necessary to strictly implement the mature cutting process. When bending occurs, the methods in the grinding process should be studied and analyzed in depth, and rectification opinions and preventive measures should be put forward. Multiplier effect with half the effort.

So what exactly affects the final cutting effect of the stone? What caused the saw blade to bend? There are three main factors:

Blank blade: Generally, the new blank blade is controlled by the tension value, flatness and end runout before leaving the factory. The blank blade often has deviations when used in the stone factory, resulting in a decline in the qualified rate of slab cutting. The main manifestation is: the processing technology used by the stone processing plant does not match the tension value of the matrix. When the tension value is too large, it is easy to cause up and down bending. The second reason is that after repeated welding, the blank blade has reached the limit of use time. In general, excessive use of the matrix or incorrect use of the matrix by the stone factory is the main cause. In addition, many stone processing factories should not be greedy for cheap base materials and use some unqualified blank blade, but should choose high-quality products produced by regular enterprises. At the same time, pay attention to the life cycle of re-welded saw blades. It seems to increase the cost, but if the saw blade is bent and the loss caused by the bent slab is cut, it will undoubtedly be outweighed by the loss.

Diamond segment: The cutting and bending of the slab is mainly because the segment is not sharp, and the segment is forcibly overloaded or moved (too large cutting depth and too fast moving speed), which leads to excessive cutting current and slab bending. Therefore, the stone processing factory should adopt the method of open diamond the new segment before cutting to quickly improve the sharpness of the segment. If conditions permit, mechanical edge shaping can be used to reduce radial runout and end runout beyond the standard amplitude. The specific method is that in the cutting process of the segment, a strict cutting process should be formulated and implemented according to the normal cutting speed or 1/3 or 1/4 of the cutting speed, and the segment should be "open diamond" to reduce the radial knife Excessive head pulsation amplitude. Otherwise, during the overload or cutting process, the saw blade base slab cannot withstand a large load, so that the segment may jump and deviate during cutting, causing the saw blade to cut and bend the board.
Welding of the blank blade and the segment: The welding manufacturers of ordinary segment generally use high-precision automatic welding machines, equipped with high-precision abrasive tools, supplemented by strict and meticulous welding procedures and quality inspection standards, so that the heating of the segment can be controlled during welding. The flatness of the blank blade and control the jitter that will occur when the saw blade is cut. Therefore, when the stone processing factory performs saw blade welding, it is necessary to choose a regular saw blade welding factory with better conditions to ensure the high quality and cutting efficiency of the saw blade, and to reduce losses and waste.

Linxing Diamond Tools specializes in the manufacture and production of diamond segment and diamond saw blades. Over the years, they have developed a complete set of non-bending combinations of cutting slab to make stone cutting easier.