can be calculated by the finite element method of stress magnitude different speeds to simulate the failure process and improve the design.
2013年8月2日星期五
Diamond (diamond) blades Know
Cutting tool cutting the substrate and coating material matrix is 0101 ~ 0115 mm thick stainless steel band, at the cutting edge wrapped with synthetic diamond particles of
nickel, the hardness varies with the change of cutting material, usually a hardness of about HV519. Most of more than 100 mm blade
Using natural corundum, because of its high hardness, corrosion resistance, low friction coefficient, anti-adhesion is good, but poor toughness, easy smash. The
Diamond blade particles of nickel wrapped tight, good fastness, cutting effect. However, when cutting heat, cooling difficulties, so the cutting
High cooling requirements. Edge using teardrop-shaped, the impact force on the substrate becomes smaller, less prone to damage, the coating of diamond particles easily
crushed under the impact of the cutting to ensure proper blade life, it does not appear good and the substrate coating damage phenomenon .
Cutting blade material cutting material generally has higher hardness than the brittle nature of the cut when the cutting force of this material, the heat generated,
and this geometry of the cutting edge, has a very high cooling requirements. Drop-shaped edge has the advantage than the rectangular edge: 1
Cutting material impact on small, easy to ensure cutting accuracy; o easy to guarantee the cut size of the slot;? Can cut high hardness, brittleness good precious
materials. Temperature and heat cutting temperature directly affects the cutting edge wear and durability, thereby limiting mention cutting speed
High-impact material to be cut machining accuracy and surface quality while cutting temperature is not conducive to safety in production. Cutting brittle materials,
short contact area, mainly in the temperature near the edge, so improving the thermal conditions are effective to reduce the temperature of the cutting means.
The main factors affecting the cutting temperature mechanical physical properties of a material, cutting, edge geometry and cooling conditions. Choose a reasonable
geometry to reduce cutting temperature has a very important role. Cutting high hardness, brittle materials using water coolant easy
Inflow of cutting edge materials and the junction of the blade to improve durability, solved using a rectangular blade easily burned, hair paste phenomenon. Moreover,
to improve flushing capacity, quickly crushing chips and powder sand washed away in time, improve the cleaning ability. Cutting the cooled cold
Cutting coolant to reduce the temperature, increasing the surface roughness is very effective, the use of coolant, can reduce the cutting temperature from two aspects:
1 reduction chips, cutting materials and the friction between the cutting edge, to reduce the generation of heat cutting; o will be generated cutting heat from the
cutting zone Xun
Speed away. The latter (the cooling effect) is to reduce the temperature of the main aspects of the cutting. Coolant also has a cleaning effect, to prevent crushing
chips and grit powder adhering to the surface of the cutting edge materials and affect the surface quality and cutting material durability, as a
Display: It can be clearly seen using the teardrop-shaped blade, blade buffered droplet impact force, reducing the cutting tool wear. If the blade is rectangular, edge
wear faster, blunt edge, the cutting action is reduced, increasing the pushing action, the heat generated increases, the cutting
Temperature, the temperature control to improve the cutting tool cutting durability has a very important significance, and cutting edge geometry for durability but
also plays a major role.
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