Lathe Operations: Facing

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Facing Operations Facing is the process of removing metal from the end of a workpiece to produce a flat surface. Most often, the workpiece is cylindrical, but using a 4-jaw chuck you can face rectangular or odd-shaped work to form cubes and other non-cylindrical shapes.

When a lathe cutting tool removes metal it applies considerable tangential (i.e. lateral or sideways) force to the workpiece. To safely perform a facing operation the end of the workpiece must be positioned close to the jaws of the chuck. The workpiece should not extend more than 2-3 times its diameter from the chuck jaws unless a steady rest is used to support the free end. Cutting Speeds

If you read many books on machining you will find a lot of information about the correct cutting speed for the movement of the cutting tool in relation to the workpiece. You must consider the rotational speed of the workpiece and the movement of the tool relative to the workpiece. Basically, the softer the metal the faster the cutting. D…

Relationship Between Sulfuric Acid and Hydrochloric Acid

Sulfuric corrosive and hydrochloric corrosive are solid acids, both of which are destructive and unsafe in concentrated structure. Sulfuric corrosive, (H2SO4) is a dreary, marginally gooey, slick fluid and is the more perilous of the two. Hydrochloric corrosive, (HCl) is a dry, unscented fluid that a larger number of takes after water than the more thick sulfuric corrosive and is otherwise called muriatic corrosive. The principle association between sulfuric corrosive and hydrochloric corrosive, other than likenesses in properties, is the way that hydrochloric corrosive can be integrated from sulfuric corrosive and regular table salt.



Both acids are firmly destructive and have numerous uses in industry and science. Sulfuric corrosive is a standout amongst the most widely recognized mechanical chemicals, and indeed, sulfuric corrosive generation is here and there utilized as one gauge of a country's level of modern improvement. A huge number of huge amounts of sulfuric corrosive are delivered every year around the world.



Hydrochloric corrosive is an alternate essential mechanical synthetic and is utilized as a part of various ways. It likewise happens characteristically in the digestive juices of numerous creatures. Sulfuric corrosive likewise happens commonly when hydrogen sulfide gas is emitted into the environment by volcanic methods. It then blends with water vapor, structuring the corrosive, though in an extremely frail structure.



The two acids impart an association in different courses also, fundamentally in certain compound properties. They both are fit for responding with and actually dissolving an extensive variety of components and mixes albeit certain substances like glass and a few metals are insusceptible to one or both of these acids. Acids are exacerbates that give a hydrogen particle in synthetic responses, and when blended with metals, hydrogen gas is structured. As acids, sulfuric corrosive and hydrochloric corrosive both have a pH of short of what 7 and will respond with any base, which is a substance with a ph over 7. Both are solvent in water too.



The principle association between sulfuric corrosive and hydrochloric corrosive is the whole time, called the Mannheim process, by which sulfuric corrosive is utilized to make hydrochloric corrosive. In the Mannheim process, unadulterated sulfuric corrosive is blended with basic table salt (Nacl), delivering a response that brings about sodium sulfate (NaS2O4) and hydrogen chloride which is hydrochloric corrosive in a vaporous structure. The gas is cooled and blended with water, making hydrochloric corrosive.

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