Defined wheel strength

Abrasives include tensile strength, flexural strength, compressive strength and resistance to funk strength. Strength is the maximum tensile stress being under tensile performance abrasive abrasive, it is abrasive manufacturing, a secondary indicator of use, direct and abrasive is being high speed winding can rupture strength. Abrasives abrasive performance flexural strength maximum bending stress or bending limit promise. Is being abrasive grinding for molding 9 _ way, such as thread grinding, crankshaft grinding and all kinds of plunge grinding, require grinding deposit is being better flexural strength to resist when grinding attack bending stress. Abrasives compressive performance is being abrasive ultimate strength under pressure, such as being flap disc for stainless steel _ blunt fracture and rupture may be the extent of it and the compressive strength is being increased radial load grinding. Anti-funk performance abrasives abrasive strength is being fixed RESISTANCE funk force under load. Abrasives abrasive strength comes from the manufacturing process, the factors linking agents and abrasive performance specifications repercussions abrasive strength are: _ abrasive type, size, variety and performance of the coupling agent, abrasive stance use, organization, density, mixing and heat treatment conditions, abrasive shape, and the aperture ratio of the outer diameter of the wheel. Process is being abrasive characteristics and specifications given current, the coupling agent performance and heat treatment conditions on the most minor of.

Wheel of successful high-speed wheel dressing tips

Wheel good repair skills to the greatest increase grinding wheel performance is a key factor in good shaping and dressing (known as trimming) tools and skilled finishing techniques. In fact, a high quality dressing wheel dressing tools and techniques to master operator can always keep grinding wheel with high performance. Rather than just relying on purchase so-called good wheel. This is very important because the plant can not operate in every individual case, with a special wheel. Dressing is an ultra hard abrasive grit grinding wheel sharp process. In this process, the need to remove the binder and abrasive grains blunt wheel between the flap discs has a strong abrasive grinding performance than outstanding binders to form a sharp cutting edge. Sharpening wheel must be from the surface of the pores, remove small materials, preventing the force acting on the metal cutting wheels on the increase, the grinding wheel on the force increases, will cause vibration and burns caused by parts of the surface.
Without proper dressing, even the best can not get high quality and wheel size consistency machined parts. In fact, when you invest in the quality of the wheel, in order to obtain a high grinding performance, good trimming them is very important.

High-speed grinding wheel classified information

The flap discs for stainless steel, divided into ordinary abrasive (corundum and silicon carbide, etc.) and super abrasive grinding wheels (diamond and CBN) wheel categories. Common feature of abrasive grinding wheel has the shape, diameter, thickness, breast diameter, abrasive, grain size, hardness, binding agents and organizations. Grinding wheel characteristic is not labeled "organization", and to indicate how much concentration of abrasive content.

Safety requirements outlined Wheel

1. Wheel diameter chuck mounted wheel diameter of not less than one-third. The abrasive reflex wheel chuck diameter not less than one-quarter the diameter of the wheel is mounted.
2. Any form of grinding wheel chuck, diameter, and pressing the left and right side of the radial width of the two parts of equal size must be equal.
3. Each surface cutting & grinding blades chuck should ensure smooth and without sharp edges, and well balanced.
4. Grinding Machinery All rotating components, such as: grinding wheels, motors, pulleys and workhead etc., must be fortified security guard. Shield should be firm, not less than the strength of their connection strength of the shield.

Grinding wheel classification

Grinding wheel variety.
Press the abrasive can be divided into ordinary abrasive (corundum and silicon carbide, etc.) and natural ceramic diamond disc and superabrasive (diamond and cubic boron nitride) grinding wheel;
According to the shape can be divided into flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel, tile granite cutting wheels, disc wheel and so on; by binding agent can be divided into pottery wheel, resin wheel, rubber wheel, metal grinding wheel. The main parameters of the grinding wheel abrasive, grain size, hardness, binding agents, shape, size and so on.
Since the wheel typically operate at high speed, before turning test should be carried out so that the use of (guaranteed at the maximum operating speed of the wheel, do not break) and static balance test (when working to prevent vibrations caused by the machine). Grindstone at work for some time, it should be trimmed in order to restore the grinding performance and correct geometry.

Special introductory wheel transport situation

1, the metal grinding disc must complete packing and shipping and collision avoidance can not be long-term bare moisture, does not contact with the bases;
2 wheel neatly stacked in flat way, not long diagonal and pressure, prevent deformation;
3, avoid direct contact with the ground, must Gechao wooden pallets stacked with care, 10-15cm ground clearance is appropriate, stacking height of not more than one meter;
4, first with the implementation of advanced principles to ensure the best use of the product;
5, the product may use more than one year should be re-tested after rotation strength and appearance.

High-speed grinding wheel hardness

Domestic and international data show that high-speed grinding infeed amount than ordinary grinding doubled. Better conditions for cooling high speed cylindrical grinding, the infeed amount than ordinary grinding infeed amount slightly increased a little. In developing this specification, the amount of selected infeed infeed grinding in general within the range of 1.52 to the amount of times.
No feed diamond polishing cup speed V at the time of sand to improve the conditions, make the contact time of the grinding wheel and the workpiece becomes shorter, so that the elastic deformation of the workpiece will be reduced, thereby eliminating the time of elastic deformation of the workpiece will be reduced.
Therefore, compared with the conventional grinding without feed grinding time, no time should be shorter feed grinding at some of the high-speed grinding.
Centrifugal wheel wheel operation is selected as F = mV2 sand r (2) From (2), the centrifugal force is proportional to the square of the speed V and the wheel sand. When the wheel speed increases from 35m / s to 60m / s, the centrifugal force will increase 2.93 times, which requires high-speed grinding wheel should have sufficient strength at that high speed grinding wheel binding agent should have sufficient bonding capacity . Therefore, when selecting the high-speed wheel-binding agent in the choice of the adhesive ability of vitrified (V). Workpiece material to be ground due to hardened bearing steel GCr15, abrasive should use strong anti-burn ability, toughness large brown corundum (A) and white corundum (WA) mix. High-speed bench grinder wheels hardness than ordinary sand 185 wheel bearing 62001.l.6 hardness 12, so not only can increase the intensity of the grinding wheel, and can meet the requirements of high efficiency, high durability. High-speed grinding wheel size should have better formability than ordinary wheel size fine 12.