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The Advantages of Using a 3 Die Thread Rolling Machine
The Advantages of Using a 3 Die Thread Rolling Machine
Thread rolling produces high quality threads at a fraction of the cost of cutting, milling and grinding.3 die thread rolling machine However, there are certain conditions that must be met in order to ensure maximum performance and quality. These conditions include proper material selection, equipment operation and maintenance, and quality control. Also, since thread rolling displaces material rather than remove it, the major diameter of the workpiece blank must match that of the final threaded part. This requires a highly accurate machine that can adjust the blank diameter according to the required thread pitch, and a careful setup of the dies.
The most important factor in determining the quality of threads produced by any thread rolling process is the type of material used.3 die thread rolling machine The material must be hard enough to allow for plastic deformation, but it must also have good formability and a good finish. Certain metals, such as lead, bismuth, sulfur and some stainless steels produce flakes or slivers which can cause thread defects, so it is important to select the correct materials for thread rolling.
Rolling machines are available for a wide range of thread forms and sizes.3 die thread rolling machine Each type has a specific set of dies that must be purchased or fabricated, and the hardness of the dies should be carefully selected. The proper material hardness allows the dies to apply and release pressure gradually, avoiding damage to the stock and maintaining a close tolerance on the major diameter of the workpiece blank.
Thread rolling also produces smooth, burnished surface finishes that do not require any additional polishing steps. The strong compressive forces that distort the metal also remove any unevenness on the workpiece's surface, unlike cut threads that often have surface roughnesses of 64 to 125 micro-inches Ra. Furthermore, rolled surfaces are free of tears, chatter marks and cutting marks.
While all threading processes produce a high level of accuracy, thread rolling is unique in that it can actually improve the strength of the finished product. Static tensile tests of threaded parts formed through rolling show increases in strength of up to 30 percent, and fatigue strength is improved by 50-75%.
Thread rolling is an extremely versatile manufacturing process that offers advantages over other machining methods in many applications. It can create a wide variety of different thread shapes and forms, and it is capable of producing threads with superior tensile, shear, and fatigue strengths. It can also be used to produce threads with tighter tolerances than those possible using other machining techniques, which can help save material and increase production efficiency. A variety of heat treatment and coating options can offer further improvements in performance. These enhancements can help to extend the life of both dies and workpieces. They can also provide improved lubrication and cooling, resulting in better quality threads and more consistent production.
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