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Posts Tagged ‘Jon’

Learn how to pick the right electrode for your arc welding project in this free DIY video for beginners.

Expert: teacherjon
Bio: Jon holds a Bachelors of Science in Education and Human Sciences degree, with an endorsement in Industrial Technology Education from the University of Nebraska in Lincoln.
Filmmaker: Jon Olson

Panel Cutting Machines is a tool that is used to remove material from the workpiece by means of shear deformation. Cutting may be accomplished by single-point or multipoint tools. Single-point tools are used in turning, shaping, planning and similar operations, and remove material by means of one cutting edge. Milling and drilling tools are often multipoint tools. Grinding tools are also multipoint tools. Each grain of abrasive functions as a microscopic single-point cutting edge (although of high negative rake angle), and shears a tiny chip.

Cutting tools must be made of a material harder than the material which is to be cut, and the tool must be able to withstand the heat generated in the metal-cutting process. Also, the tool must have a specific geometry, with clearance angles designed so that the cutting edge can contact the workpiece without the rest of the tool dragging on the workpiece surface. The angle of the cutting face is also important, as is the flute width, number of flutes or teeth, and margin size. In order to have a long working life, all of the above must be optimized, plus the speeds and feeds at which the tool is run.

è Different types of the Cutting tools

Single-point cutting tools can be classified by their motion as linear or rotary, depending on whether they rotate while cutting. Linear cutting tools include tool bits (single-point cutting tools) and broaches. Rotary cutting tools include drill bits, countersinks and counterbores, taps and dies, milling cutters, and reamers. Other cutting tools, such as bandsaw blades and fly cutters, combine aspects of linear and rotary motion.

è Replaceable Cutting tools

Cutting tools are often designed with inserts or replaceable tips (tipped tools). In these, the cutting edge consists of a separate piece of material, either brazed, welded or clamped on to the tool body. Common materials for tips include tungsten carbide, polycrystalline diamond, and cubic boron nitride. Tools using inserts include milling cutters (endmills, fly cutters), tool bits, and saw blades.

è Materials used in the Cutting tools

Cutting tools are made using a variety of materials and the selection of a cutting tool material depends on a variety of factors.

To produce quality parts, a cutting tool must have three characteristics:

* Hardness — hardness and strength at high temperatures.

* Toughness — toughness, so that tools don’t chip or fracture.

* Wear resistance — having acceptable tool life before needing to be replaced.

Cutting tool materials can be divided into two main categories: stable and unstable.

Unstable materials (usually steels) are substances that start at a relatively low hardness point and are then heat treated to promote the growth of hard particles (usually carbides) inside the original matrix, which increases the overall hardness of the material at the expense of some its original toughness. Since heat is the mechanism to alter the structure of the substance and at the same time the cutting action produces a lot of heat, such substances is inherently unstable under machining conditions.

Stable materials (usually tungsten carbide) are substances that remain relatively stable under the heat produced by most machining conditions, as they don’t attain their hardness through heat. They wear down due to abrasion, but generally don’t change their properties much during use.

Most stable materials are hard enough to break before flexing, which makes them very fragile. To avoid chipping at the cutting edge, most tools made of such materials are finished with a slightly blunt edge, which results in higher cutting forces due to an increased shear area. Fragility combined with high cutting forces results in most stable materials being unsuitable for use in anything but large, heavy and stiff machinery.

For more information on Panel Cutting Machines you can visit http://www.homag-india.com/

Related Welding Bandsaw Blades Articles

Learn proper ventilation for welding fumes in this free DIY video for beginners.

Expert: teacherjon
Bio: Jon holds a Bachelors of Science in Education and Human Sciences degree, with an endorsement in Industrial Technology Education from the University of Nebraska in Lincoln.
Filmmaker: Jon Olson

Learn tips and techniques for post weld cleaning in this free DIY video for beginners.

Expert: teacherjon
Bio: Jon holds a Bachelors of Science in Education and Human Sciences degree, with an endorsement in Industrial Technology Education from the University of Nebraska in Lincoln.
Filmmaker: Jon Olson

Tips on how to run a bead of weld to improve your welding techniques in this free DIY video for beginners. Expert: teacherjon Bio: Jon holds a Bachelors of Science in Education and Human Sciences degree, with an endorsement in Industrial Technology Education from the University of Nebraska in Lincoln. Filmmaker: Jon Olson