Friday, April 5, 2019

Engineering Health and Safety Principles

Engineering Health and arctic Principles1. What ar the main responsibilities of the employer and the employee under Health and Safety Act 1992? retort Duties of employersEvery employer sh totally take all pr goicable steps to ensure that no action or inaction of any employee small-arm at work harms any other person.Duties of employeesEvery employee shall take all practicable steps to ensure-(a) the employees safety while at work (including by using suitable protective clothing and suitable protective equipment provided by the employer(b) that no action or inaction of the employee while at work causes harm to any other person.(health and sefatey in employment act 1992, 2014)2. In marking the choice of which type of exquisite fluid to use, galore(postnominal) factors have to be considered. Name deuce of the important factors? dissolve selection of the emasculatedting fluid in ecumenical depends on the types of machining physical process whether coolant, lubri brush asidet o r both are required. Though selection for the effective bare-ass fluid depends the various factors which are type of machining , tool and workpiece materials, cutting amphetamine, and the method of application.For example machining process with long-play cutting operation and where tools are exposed to high pressure in such cases fluid with genuine lubricating characteristics is required. Whereas, selection for the fluid is changed in high speed operation as in high speed operation temperature rises significantly so that fluid which has corking cooling capacity and with some lubricity is required.(manufacturing plan and technology, 2014, p. 617)3. What is the mathematical function of chip breakers in the Turning Process? Answer purpose of chip breaker in round processchip breaker controls the flow of the chip during machining.Eliminates the long chips as it can be hazard.Also reduce the heat.Reduce the intendancy of the vibration.(manufacturing design and technology, 2014, p. 607)4. What effect would decrease the cutting speed have on tool life of a milling cutter? Answer Because high cutting speed increases the temperature which results into the shorting of the tool.(manufacturing engineering and technology, 2014, p. 585)5. Name two ways work can be held on a cylindrical pulverisation? Answer Universal crunch In universal grinding, both the workpiece and the wheel axes can be travel and swivelled around a horizontal plane, thus permitting the grinding of tapers and other shapesThread grinding thread grinding is done cylindrical grinders, using specially dressed wheels matching the shape of the thread.(manufacturing engineering and technology, 2014, p. 748)6. how is feed condition on a drilling machine? AnswerDiameter of Drill InchesFeed Inches per Revolution infra 1/8.001 to .0031/8 to 1/4.002 to .0061/4 to 1/2.004 to .0101/2 to 1 inch.007 to .0151 inch and over.015 to .025(drill feeds and speeds, n.d.)7. What is the conflict amid truing and f ecundation a grinding wheel? Answer dressing is the process of a conditioning, producing sharp new edges on worn grains on the grinding surface of a wheelTruing truing is the process of producing a true mass on a wheel that has become out of round.(manufacturing engineering and technology, 2014, p. 744)8. In wire cut EDM, wherefore does electrode wear not affect the accuracy of the cut? Answer Because electrode doesnt touches the workpiece.(manufacturing engineering and technology, 2014, p. 781)9. What is concurrent engineering? Answer Concurrent engineering also surviven as combine harvest-feast organic evolution (IPD) its methodology is base on the parallelisation of task which means preforming the task concurrently. Concurrent engineering prefers to an approach to new product development in which all other engineering functions like design engineering, manufacturing engineering and other functions are integrated together in order to reduce the elapsed time required to brin g new product to the market.(concurrent engineering , 2017)10. In join, what do the letters GTAW stand for? Answer Gas tungsten arc welding(GTAW, 2017)11. De okay break-even point when comparing two types of machines making the same part? Answer Break-even perspective are the purpose which offers precisely disguise its bes. Therefore these methods not lead to any benefit or reduction. When two different machines are making same part, the purpose of which is to offers disguise costs.12. In machining trading operations, how does forming differ from generating? Answer generating generating machining operations of the workpiece are dependent on the feed or the movement of the cutting tool which involves different turning operations such as straight cutting, taper turning, peripheral milling and profile milling.Whereas forming machining operations is found workpiece geometry dependent on the tool geometry. Cutting edge of the tool and surface of the work part has the dispel shape ex ample form turning, broaching, drilling.(Forming and Generating Method in Lathe Machine Operations, 2016)13. What are the two forms of broaching and what types of machine is utilise for each form? Answer surface broaches surface broches which generally apply for cutting flat surface. Broches includes slab, slot, contour, dovetail, voltaic pile ( for precision external shapes) and straddle.Internal broaches internal broaches which is generally used for close-tolerance hole. Broches includes hole keyway, internal gear, rifling (for artillery barrels).(manufacturing engineering and technology, 2014, p. 684)14. What is struggle between a CNC machining centre and a universal milling machine? Answer cnc machining centre is computer controlled program, which takes the instruction from the computer to select and control tools that used for cutting or geological formation the surface to new product. Whereas universal milling machine is fitted with table so that it can have performanc e in all direction and also diving head which has ability to change gears so they can perform milling operation in all the direction.(manufacturing engineering and technology, 2014, pp. 703,705,669)15. State an essential requirement for a lathe, which is intended to be used with diamond tooling Answer diamond tooling is done when we have to give good surface stop and critical dimension for example for polishing granite(manufacturing engineering and technology, 2014, p. 614)16. What type of machining process would be used to cut an external keyway in a shaft? Answer machining process used to cut keyways in a shaft is keyway broaching also known as spline broaching( wedlock answers, 2014)17. Define what is meant by bounder CAM?Answer CAD computer aided designCAD, which basically based on the principle of creating a technical drawing using different parcel like AUTOCAD, SOLIDWORKS, and PRO-ECAM computer aided manufacturingWhereas CAM is referred as an software use to control manufac turing process like cont ringlet machining tool which gives high precision. Machine used on the principle of CAM is known as CNC computer numerical control machine.(wikipedia , 2017)18. Name two materials used to puddle EDM electrodes for a sink type machine Answer The materials which are commonly used for the making ring EDM electrode are graphite, brass or copper tungsten. Graphite is used because of its superior machining capabilities and wearability, and copper is used because of its fine finish requirements.(qualitty EDM, 2008)19. What feature controls the cutting speed of a milling centre? Answer As we know the cutting speed V in peripheral milling is the surface speed of the cutterV = DNWhere D is the cutter diameter and N is the rotational speed of the cutter.Thus cutting speed is forthwith dependent on the diameter and as well as the rotational speed of the cutter.(serope kalpakjian, 2014)20. What is the main difference in the type of materials that can be machined when using either EDM or Water Jet cutting process? Answer water jet cutting process non-conductive material such as glass. Wood, flexible, ceramicEDM material needs to be electrical conductive as EDM cuts through sparks such as graphite and metal(advanced manufractruring , 2005)21. Compare 2 of the following stamp processes on surface finish, accuracy, type of pattern and cost a. Sand work b. Shell moulding c. Gravity die casting d. Pressure die casting AnswerSand mouldingShell mouldingSurface finishNot good machining, forging, may required to obtain the required shape followed by the quality controlGood surface finishAccuracyDimensionally accurateHigh precisionType of patternMatch plate pattern legion(predicate) patternCost let loose costLow cost(manufacturing engineering and technology, 2014, pp. 705,711)22. Explain the purpose for which the investiture casting process is used. Indicate the type of material that can be cast and some general estimate of the finish and accuracy ob tained Answer Purpose knee replacementType of material ferrous and non-ferrous metal alloys.Surface finish good surface finishAccuracy high precision(manufacturing engineering and technology, 2014, pp. 271-272)23. Explain clearly the difference between the HOT and COLD chamber die casting processes, bad the types of material casting in each process Answer Hot-chamber process use a plunger to forces a certain volume of metal into the die cavity through a gooseneck and nozzle2.Cold-chamber process is where molten metal is poured into the injection cylinder (shot chamber)(manufacturing engineering and technology, 2014, pp. 278-279)24. Giving examples of each show the difference between injection moulded and compression moulded plastic parts Answer Injection moulded plastic Compression moulded plasticin injection moulded is used with thermoplastic polymersCompression moulding is used with thermosetting plasticsfor example injection moulding is used for making chair. machine has three main parts i.e. injection unit, mould and clamp. process starts when plastic is poured into hopper from where plastic pallet moves to the barrel of injection unit inside, a screw transports the pallets forward t. roll of tobacco bands wrapped around the barrel warms up the plastic pallets. as the pellets are moved forward by the screw, they gradually melt, and are entirely molten by the time they reaches the front of the barrel. once enough molten plastic is in the front of the screw it rams forward like the plunger of a syringe. in a matter of seconds, the screw injects the molten plastic into the empty part of the mould called the cavity image. the plastic solidifies in under a minute the mould opens and the part is ejected.for example compression moulding is used to attract rubber boots for which plastic is pre heated and then poured into the mould and held there for few minutes at icy temperature and then finished product is then removed from the mould and then can be machin ed for supercharge better finish or removal of the waste(plastic injection molding , 2015)(manufacturing engineering and technology, 2014, pp. 512,520)25. What is the main difference between Hot Rolling and Cold Rolling, Giving examples of each process? Answer Hot rollingCold rollingLow toleranceHigh toleranceMore MalleableIncrease intensity of material through strain Harding as much as 20%High temperature up to 1000FLow temperature equal to room temperatureSink when cooled downMore precise dimensionsHot rolled steel is used in situations where precise shapes and tolerances are not requiredFor example used in welding and I-beam algid rolled steel is used in situations where precise shapes and tolerances are required. For example used in work of metal furniture or desks.(n.d.). Retrieved from https//www.metalsupermarkets.com/difference-between-hot-rolled-steel-and-cold-rolled-steel/administration, n. z. (2014, april 4). health and sefatey in employment act 1992. Retrieved from new zealand legislation http//www.legislation.govt.nz/act/ human race/1992/0096/latest/DLM278829.htmlconcurrent engineering . (2017, march 7). Retrieved from wikipedia https//en.wikipedia.org/wiki/Concurrent_engineeringcoupling answers. (2014, december 2). Cutting Keyways Broaching, Keyseating, Wire-Cut EDM, Shaping, Milling . Retrieved from coupling answer http//www.couplinganswers.com/2014/12/cutting-keyways-broaching-keyseating.htmlcrayons, s. (Director). (2015). plastic injection molding Motion Picture.drill feeds and speeds. (n.d.). Retrieved from viking drill and tool http//www.vikingdrill.com/viking-Drill-FeedandSpeed.phpForming and Generating Method in Lathe Machine Operations. (2016, februray 17). Retrieved from mechaenical engineering https//basicmechanicalengineering.com/forming-and-generating-method-in-lathe-machine-operations/government, n. z. (1992, jan 1). health and safety employment act 1993. Retrieved from New Zealand legislation http//www.legislation.govt.nz/act /public/1992/0096/latest/DLM279232.htmlGTAW. (2017, march 11). Retrieved from wikipedia https//en.wikipedia.org/wiki/Gas_tungsten_arc_weldingmetalsupermaket. (2014, septemeber 14). difference between hot rolled and cold rolled steel . Retrieved from metal supermarket https//www.metalsupermarkets.com/difference-between-hot-rolled-steel-and-cold-rolled-steel/qualitty EDM. (2008). Electrical discharge machining (EDM). Retrieved from qualitty EDM http//www.qualityedm.com/sinkeredm.htmlserope kalpakjian, s. R. (2014). manufacturing engineering and technology. new york pearson.sme. (2005, october 1). Retrieved from advanced manufractruring http//advancedmanufacturing.org/waterjet-vs-edm/wikipedia . (2017, march 24). cad/cam. Retrieved from wikipedia https//en.wikipedia.org/wiki/Computer-aided_manufacturing

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