The saw blade wear and service life factors can not be ignored

Can not ignore the saw blade wear and service life factors, let's take a look. 1, wear has normal wear and abnormal wear, the tool under high temperature and high pressure and the cutting material produce strong friction, temporarily passivating the edge wear, they are caused by the following problems: A, after the blade wear occurs in the front knife surface adjacent to the cutting, the back wear when the formation of the edge surface tends to zero. B, after the front tool face wear, the front tool face leaves the main cutting edge to form a crescent, this wear generally occurs on the cutting of thick plastic materials. C, front and back edge wear at the same time This wear is caused by the front knife surface crescent and the back knife surface wear edge at the same time.

2, abnormal wear: A, is the tool Angle design or manufacturing process formation. B, material elasticity plasticity, stress, dynamic balance and many other factors. C, alloy wear resistance resulting in rolling edge and matrix rigidity.

3, tool wear reasons: A, grinding rough blade grooves, alloy hardness wear resistance and cutting hardness ratio is small. B, bonding wear, knife Angle and cutting plate friction produced by high temperature bonding. C, diffusion wear In high temperature cutting alloy elements and wood chemicals mutually diffuse to form chemical purification. D, phase change wear, alloy and matrix under temperature change or dynamic pressure lead to material phase change, lose unstable dynamic cutting. E, oxidative wear oxygen in the air and cobalt, tungsten, titanium carbide in the alloy occur oxidative wear. F, other wear, the cutting process by the impact of the tooth seat force rigidity is not enough to produce elastic or plastic displacement, welding internal stress is too large and mechanical factors.

4, alloy circular saw blade wear process. The surface roughness is too large, the diameter skip is large, the alloy blade belt is not working at the same time, some of the load is too heavy, and some of the load is too light. Too small front Angle affects the heat dissipation of each cutting part, the front and back angles of each alloy are not uniform, and the metallographic structure of some alloys causes changes in the edge belt during cutting.

5, affect the alloy circular saw blade life factors, the smaller the thermal conductivity, the worse the heat dissipation effect of the tool, so the alloy circular saw blade dry cutting heat dissipation has a difficult and solve the problem. To have a reasonable selection of tool geometric parameters is to ensure their service life. Increasing the front Angle reduces the cutting force, decreases the temperature, and decreases the strength when the front Angle is too large. The back Angle and back edge Angle are reduced, and the cutting speed is too slow. Between them is still full of contradictions, of course, the factors affecting the tool are still many different.

6, alloy circular saw blade to enhance the principle of service life, the matrix material as far as possible to use alloy tool steel so that the matrix temperature at 300° will not produce deformation, stress elimination, tooth seat heat sink design scientific rationality. Knife-edge thickness-coefficient 0.8~1= matrix thickness. Alloy configuration should not be too small, too thin and too short, welding should strictly consider welding strength, temperature, stress and process, grinding process, grinding fluid, emery wheel material and particle size, equipment rigidity and equipment accuracy, grinding feed speed and feed amount, tool life as long as there is a reasonable value to reduce processing costs and improve service life. If the economic way is used in production, the life will inevitably decrease and the efficiency will naturally increase.