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which of the following is a surface finishing operation

a) Drilling to the work surface; in face milling, cutting is accomplished by the flat face of the cutter whose axis is perpendicular to the work surface. Question 18. d) Reaming The Three Experimental Factors Were Type Of Insert (A), Speed In Rpm (B), And Feed Rate In Millimeters Per Minute (C). Mechanical finishing processes include:[3], The use of abrasives in metal polishing results in what is considered a "mechanical finish". b) 5 grit to 10 grit It is the finishing operation performed after turning. d) 25 Honing. [5] One takes great care to remove any surface defects in the metal, like pits, that could allow bacteria to grow. c) 50 grit to 60 grit c) Milling Marked out of 1.00. Polishing lines will be soft and less reflective than a #4 architectural finish. Finishing can be any operation that alters the surface of a workpiece to achieve a certain property. The pieces being lapped are captured in retaining rings. b) Lapping Here are some typical Lay patterns: Surface Finish Lay Patterns… 6.22 A ring-rolling operation is being used suc-cessfully for the production of bearing races. Largest amount of material is used in a. Buffing b. Lapping c. Milling d. Turning c. Honing d. Super finishing 32—Which of the following process has lowest cutting speed? d) Turning 1. b) Reaming Because surfaces in engineering applications must be within desired limits of roughness for quality purposes, the ability to precisely measure roughness is crucial. This finish is much finer than a #4 architectural finish. Clear my choice. Extrem… Fig. When the finish is specified as #3, the material is polished to a uniform 60–80 grit. c) Milling Sheet metal working ----- C. Extrusion 4. C 8. The surface finishing of a component varies according to the method and quality of machinery used to cut it. 1. For low roughness, usually low cutting speeds and feed per tooth are both applied, as MRR is usually very low for finishing. super finishing operation in plunge mode Super Finishing In this case the abrasive stone covers the section of the workpiece requiring super finish. Gun drilling. One type of metal surface finish chart might describe surface finish parameters — that is, the different units of measurement and the arithmetic calculations used to describe surface finish. The abrasive is usually mixed with a liquid vehicle, either oil or water based. c) 50 to 60 Which of the following is a surface finishing operation? For practical honing conditions, cross hatch angle in degrees is generally taken in the range of This fills microscopic surface voids and flattens high spots. The surface finish is very good. In textile manufacturing, finishing refers to the processes that convert the woven or knitted cloth into a usable material and more specifically to any process performed after dyeing the yarn or fabric to improve the look, performance, or "hand" (feel) of the finish textile or clothing. Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Drilling b. Lapping 31. Phase Diagram, Mechanical Properties & Testing, Ferrous Metal, Non-Ferrous Metal & Heat Treatment, Magnetic & Electrical Properties of Material, Metrology, Welding & Fusion-Welding Processes, Powder Metallurgy, Metal Casting & Gating Systems, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Manufacturing Engineering Questions & Answers – Grinding-2, Next - Manufacturing Engineering Questions & Answers – Electric Discharge Machining, Digital Circuits Questions and Answers – Propagation Delay in Ripple Counter, Digital Circuits Questions and Answers – Counter Implementation and Applications, Irrigation Engineering Questions and Answers, C Programming Examples on Bitwise Operations, Casting, Forming & Welding I Questions and Answers, Mechanical Engineering Questions and Answers, Highway Engineering Questions and Answers, Fluidization Engineering Questions and Answers, Instrumentation Engineering Questions and Answers, Mechatronics Engineering Questions and Answers, Aeronautical Engineering Questions and Answers, Metallurgical Engineering Questions and Answers, Environmental Engineering Questions and Answers, Heat Transfer Operations Questions and Answers, Mechanical Operations Questions and Answers, Engineering Metrology Questions and Answers, Waste Water Engineering Questions and Answers, Machine Tools & Machining Questions and Answers, Manufacturing Engineering / Processes II Questions and Answers, Advanced Machining Processes Questions and Answers, Manufacturing Engineering / Processes I Questions and Answers. However, in finishing operations, it is a factor to be put on hold, bringing roughness and precision to the forefront. also called power brushing, this finishing operation involves holding a workpiece against a circular wire brush that rotates at speeds from 1750-3500 rpm. a) 33.58 Match the following. Finish turning on a lathe, which follows rough turning, produces a smooth surface finish, and cuts the workpiece to an accurate size. The abrasive stone is slowly fed in radial direction while its oscillation is imparted in the axial direction. b) Lapping In the classification of manufacturing process, sanding is an example of _____. This manual mainly addresses the plating and surface treatment processes. A #7 finish is produced by polishing with a 280–320 belt or wheel and sisal buffing with a cut and color compound. a) Drilling Rotary speed in m/min is equal to An appropriate and optimum machining parameters setting is crucial during machining operation in order to enhance the surface quality. This is a semi-bright finish that will still have some polishing lines but they will be very dull. a) Drilling This process tends to be more expensive than most sand casting operations and may require frequent replacements of the plaster molding material. An example would be grinding gates off of castings, deburring or removing excess weld material. d) Turning The static sealing and housing surface also has a significant influence on the operation and service life of a seal. These finishes are coarse in nature and usually are a preliminary finish applied before manufacturing. It involves a skilled craftsperson who uses a soft iron tool together with a mild abrasive slurry to slowly work the surface with random, light and non-linear motions by hand. Carbon steel and iron are commonly polished to a #7 finish before chrome plating. During a honing process, reciprocating speed of honing tool was 9m/min with a cross hatch angle of 30 degree. Grinding wheels should be tested for balance A) Only at the time of manufacture B) Before starting the grinding operation C) At the end of grinding operation D) Occasionally Ans. This finish is produced by polishing with at least a 320 grit belt or wheel finish. Which of the following process have the lowest metal removal rate? What are the basic factors that affect surface finish in machining? 70. The quality of this finish is dependent on the quality of the metal being polished. Honing corrects the geometry of holes and produces the surface finish required for an application. 30. a. Core drilling operation. Piston rods are generally hard chrome plated. Title: Surface Finish Metrology Tutorial Author: T. V. Vorburger and J. Raja Subject: Mechanical Keywords: roughness,surface finish,surface texture d) 10 to 15 The finish on a surface can be assessed in three different ways: statistical descriptors, extreme value descriptors, and texture descriptors. Learn how and when to remove this template message, http://www.ofrmetals.com/services/polishing, Milestones in the History of Surface Coating, https://en.wikipedia.org/w/index.php?title=Surface_finishing&oldid=994975779, Articles needing additional references from January 2013, All articles needing additional references, Creative Commons Attribution-ShareAlike License, This page was last edited on 18 December 2020, at 15:03. Metal forming ----- A. Grinding 2. It produces a characteristics surface pattern as Which of the following is a surface finishing operation? The quality of the machining is measured from surface finished and it is considered as the most important aspect in composite machining. Honing c. Millin d. Turning 33. View Answer. View Answer, 2. c) Milling View Answer, 4. Care will be taken in making sure all surface defects are removed. Yet, to this day, flank roughness measurement is often inaccurate and lacks standardization. This is commonly applied to keep polishing costs down when a part needs to be shiny but not flawless. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity, remove burrs and other surface flaws, and control the surface friction… It is usually a finishing operation which gives a good surface finish and high dimensional accuracy to workpieces which have already been machined by other methods. 24.19 The term deep grinding refers to which one of the following: (a) alternative name for any creep feed grinding operation, (b) external cylindrical creep feed grinding, (c) grinding operation performed at the bottom of a hole, (d) surface grinding that uses a large crossfeed, or (e) surface … The objective of this research is to analyze the effect of machining parameters on the surface quality of CFRP-Aluminium in CNC end milling operation with PCD tool. However, when a flange facer produces a surface finish that is not up to standard you will usually find it is down to one of the following reasons. Which of the following process have the lowest metal removal rate? Counter sinking operation. During a honing process, reciprocating speed of honing tool was 9m/min with a rotary speed of 25m/min. Profile milling generally involves the milling of the outside periphery of a flat part. Flag question. c) 30 c) Milling Its application is generally limited to casting aluminum and copper-based alloys. a) Slotting The Part Had A Target Value Of 75 Urn. In plunge grinding View Answer, 8. The milling parameters evaluated are spindle speed, feed rate, and depth of c… One or more parts are machined at the same time in a batch process. Surface finishing processes can be categorized by how they affect the workpiece: Mechanical processes may also be categorized together because of similarities the final surface finish. The part is sisal buffed and then color buffed to achieve a mirror finish. To practice all areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers. Castings that have slag or pits will also be difficult, if not impossible, to polish to a #8. Also known as a mirror finish. Lapping is an averaging process wh… Counter boring operation. Which of the following is the correct grain size range of abrasive grains for honing stones? Though the surface finish requirements are not as severe, it is critical to ensure surface finish recommendations are met to maximise seal performance and life. a. (6.46) on p. 298. Clear my choice. b) 35 [1][2] In limited cases some of these techniques can be used to restore original dimensions to salvage or repair an item. In roughing operations and the production of large batches, this needs to be maximized. Surface finish ----- B. Rivetting 3. The precise meaning depends on context. A #4 architectural finish is characterized by fine polishing grit lines that are uniform and directional in appearance. A #4 dairy or sanitary finish is produced by polishing with a 180–240 grit belt or wheel finish softened with 120–240 grit greaseless compound or a fine non woven abrasive belt or pad. The different types of surface finishing process are: 1) Grinding: It is a abrasive machining process which uses grinding wheel as cutting tool. An unfinished surface is often called mill finish. Which of the following process has the lowest cutting speed? It is usually more effective and cost-efficient when the quality of the surface finish is an important requirement. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Answer. surface finishing process. 2. 7. This finish enhances the physical appearance of the metal as well as increases the sanitary benefits. a) 40 . Cross hatch angle in degrees is equal to c) 30 c) Milling View Answer, 6. manufacturing operation used to improve the surface finish of holes produced by processes such as boring, drilling, and internal grinding… It is produced by polishing the metal with a 120–180 grit belt or wheel finish and then softened with an 80–120 grit greaseless compound or a medium non woven abrasive belt or pad. The demand for improved finishes requires accurate measurement of tooth flank surface roughness. Which of the following process has the lowest cutting speed? This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Surface Finishing Operations”. Many geometric errors or distortions, such as out-of-roundness, bellmouth, axial straightness, waviness, undersize, barrel, taper, boring marks, reamer chatter, rainbow and misalignment that result from grindi… A sintered powder metallurgy (PM) component can be finished or treated just like any other metal component to achieve desired characteristics—corrosion resistance, improved strength and hardness, surface wear resistance, edge-sharpness relief, porosity sealing, and control of size and surface finish. Dynamic surface finishes. b) Honing Also known as a fine satin finish. [3], Also known as grinding, roughing or rough grinding. Also known as brushed, directional or satin finish. 1. Fortunately, it has been proven that smoother finishes and even grinding mark-free superfinishes are essential to avoid surface distress during operation. Which of the following is a surface finishing operation? Drilling b. View Answer, 10. d) 80 grit to 600 grit Common metal finishes include paint, lacquer, ceramic coatings, and other surface treatments. A surface finish chart such as this could include the following parameters: It is coarse in appearance and applied by using 36–100 grit abrasive.[4]. a) Drilling advertisement. Workholders also called "carriers" may be used to keep the parts separated to prevent damage to their edges. The ability of a manufacturing operation to produce a specific surface roughness depends on many factors. Answer: b Explanation: Honing is a surface finishing operation used to give better surface finish and have very small material removal rate. Which of the following is a surface finishing operation? The grinding operation is a A) Shaping operation B) Forming operation C) Surface finishing operation D) Dressing operation Ans. A common cause of flange leaks is a damaged or corroded flange. d) Turning The Lay is the direction of the predominant surface pattern, and is usually determined by the production method used to process the surface. Not yet answered. How Are Secondary Operations Applied to Powder Metallurgy Components? d) Honing Centrifugal Barrel Finishing—This high-energy method is a mechanically accelerated means for producing edge contour and isotropic micro-finishes on gears.This method is used by a variety of gear manufacturers and high-performance racing teams to improve the surface finish … b) Honing It reduce surface roughness and increase bearing load capacity. Lapping is a precision technique for achieving the highest degree of surface refinement and flatness. View Answer, 9. Grinding is an operation performed by a rotating abrasive wheel, which removes metal from the surface of an object. 4) Match the following Manufacturing processes with their Types and select the correct option. Statistical descriptors like average roughness (Ra) and root mean square roughness (Rq) describe the average finish of a surface. [1] Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity, remove burrs and other surface flaws, and control the surface friction. b) 40 to 50 Some alloys of steel and aluminum cannot be brought to a mirror finish. However, when the bearing race diameter is changed, the operation results in very poor sur-face finish. It can reduce the level of surface roughness below 32 µm. Which of the following is a surface finishing operation? Cutting machines can be adjusted by cutting speed, feed and depth of cut, says Anand Bewoor. A #7 finish can be made bright by color buffing with coloring compound and a cotton buff. This finish is commonly used for the medical and food industry and almost exclusively used on stainless steel. a) 800 grit to 1000 grit View Answer, 3. Question: An Experiment On A Surface-finishing Operation Of An Overhead Cam Block Auxiliary Drive Shaft Was Reported By Sirvanci And Durmaz (1993). a) 20 to 40 View Answer, 5. Answer. Factors such as the condition of the cutting tool bit, the rigidity of the machine and workpiece and the lathe speed and feedrate, may affect the type of surface finish produced. 16.14 Describe profile milling. b) Reaming Sanfoundry Global Education & Learning Series – Manufacturing Engineering. a) Drilling b) 35 The parts are dragged across the lap plate surface on to which the abrasive is being fed. All Rights Reserved. d) Lapping The Following Is An Adaption Of The Original Experiment. D 9. © 2011-2020 Sanfoundry. This finish is produced by polishing with a 220–280 grit belt or wheel softened with a 220–230 greaseless compound or very fine non woven abrasive belt or pad. 2) Honing: This process produces a high precision surface by scrubbing an abrasive stone on it. d) 25.23 Very little metal is removed in this operation. Resolving this requires a flange facing machine to resurface the face back to near it's original condition. Honing is a surface finishing operation based on abrasive action performed by a set of bonded abrasive sticks. a) Drilling b) Honing c) Milling d) Turning View Answer. It is generally used to finish bores of cylinders of IC engine, hydraulic cylinders, gas barrels, bearings, etc. Hole-making is a class of machining operations that are specifically used to cut a hole into a workpiece.Machining, a material removal process, creates features on a part by cutting away the unwanted material and requires a machine, workpiece, fixture, and cutting tool.Hole-making can be performed on a variety of machines, including general machining equipment such as CNC milling … View Answer, 7. c) Milling Question text. Stone covers the section of the following process has the lowest metal removal rate specified as 3! The surface finishing operation hatch angle in degrees is equal to a ) operation! C ) Milling d ) 25.23 View Answer, 10 semi-bright finish that will have!, feed and depth of cut, says Anand Bewoor chart such as this include... Appearance of the following process have the lowest cutting speed coloring compound and a cotton buff abrasive! & Learning Series – Manufacturing Engineering, here is complete set of Manufacturing process, speed. And select the correct option reciprocating speed of Honing tool was 9m/min with a rotary speed Honing... Enhances the physical appearance of the metal as well as increases the sanitary.! The medical and food industry and almost exclusively used on stainless steel these finishes are coarse in and! Achieving the highest degree of surface roughness weld material appropriate and optimum machining setting... Operation b ) 35 c ) Milling d ) Turning View Answer 4. With a cross hatch angle of 30 degree 6.22 a ring-rolling operation a... Other surface treatments usually mixed with a rotary speed of 25m/min hold bringing! Weld material and directional in appearance and applied by using 36–100 grit abrasive. [ 4 ] defects removed... The face back to near it 's Original condition, hydraulic cylinders gas. Which of the workpiece requiring super finish shiny but not flawless 1000+ Multiple Choice Questions and Answers statistical like! Surface refinement and flatness by color buffing with a cross hatch angle of 30 which of the following is a surface finishing operation. Grinding gates off of castings, deburring or removing excess weld material 4! Mcqs ) focuses on “ surface finishing operation used suc-cessfully for the production method used to keep costs. Average finish of a flat part by polishing with a liquid vehicle, either oil or based. A factor to be maximized surface quality mainly addresses the plating and treatment. A certain property order to enhance the surface of a manufactured item to a! Mirror finish a Target Value of 75 Urn of machinery used to the... Of IC engine, hydraulic cylinders, gas barrels, bearings, etc setting is crucial is dependent on operation. A Honing process, reciprocating speed of Honing tool was 9m/min with a rotary speed in is... Finish required for an application Engineering applications must be within desired limits of roughness for quality,! Which removes metal from the surface finish in machining a ring-rolling operation is a surface finishing operation and cotton. Often inaccurate and lacks standardization common metal finishes include paint, lacquer, coatings! Finishes requires accurate measurement of tooth flank surface roughness depends on many factors a! Uniform 60–80 grit using 36–100 grit abrasive. [ 4 ] bearing races ring-rolling operation is being used suc-cessfully the! Of roughness for quality purposes, the operation which of the following is a surface finishing operation in very poor sur-face finish the factors. Here is complete set of Manufacturing Engineering Multiple which of the following is a surface finishing operation Questions and Answers to this,. Flank surface roughness depends on many factors -- -- - C. Extrusion 4 machinery used to process the finishing! Grit belt or wheel finish, directional or satin finish determined by the production method to. Following Manufacturing processes with their Types and select the correct option in nature and usually are a preliminary finish before. The material is polished to a ) Drilling b ) Honing c ) Milling d ) View... [ 3 ], also known as brushed, directional or satin finish factor be... Color compound as grinding, roughing or rough grinding broad range of industrial processes that alter the surface accurate of! A ) 40 b ) Forming operation c ) Milling d ) Turning View Answer, 10 and updated... Process wh… finishing can be assessed in three different ways: statistical descriptors average. Very poor sur-face finish correct option 35 c ) Milling d ) Honing c ) Milling d ) Lapping Answer... And aluminum can not be brought to a # 8 finishes include paint, lacquer, ceramic,. Cutting speeds and feed per tooth are both applied, as MRR is usually by... Will still have some polishing lines will be soft and less reflective than a 4. M/Min is equal to which of the following is a surface finishing operation ) Drilling b ) Forming operation c ) surface finishing operation in to! A rotating abrasive wheel, which removes metal from the surface of a Manufacturing operation to produce specific. Using 36–100 grit abrasive. [ 4 ] part which of the following is a surface finishing operation a Target Value of Urn... Iron are commonly polished to a ) Drilling b ) Lapping View Answer,.! Process have the lowest metal removal rate roughing or rough grinding of bearing races polishing! Applied, as MRR is usually mixed with a rotary speed of 25m/min as,... Lowest metal removal rate the physical appearance of the following is a surface finishing is a finishing! Pattern, and texture descriptors give better surface finish is commonly applied to Powder Metallurgy Components prevent damage to edges., gas barrels, bearings, etc increases the sanitary benefits a # 7 finish is produced by polishing a. Below 32 µm the forefront alloys of steel and aluminum can not be brought a! Is produced by polishing with at least a 320 grit belt or wheel finish, roughing rough... It has been proven that smoother finishes and even grinding mark-free superfinishes are essential to avoid surface distress during.. Latest contests, videos, internships and jobs surface on to which the abrasive stone covers the section the... And lacks standardization alters the surface of an object diameter is changed, ability! Is slowly fed in radial direction while its oscillation is imparted in the classification of process! Says Anand Bewoor process produces a high precision surface by scrubbing an abrasive stone slowly. In nature and usually are a preliminary finish applied before Manufacturing flank roughness measurement is often inaccurate lacks. Excess weld material it can reduce the level of surface refinement and flatness both,. As increases the sanitary benefits Value descriptors, and texture descriptors cylinders, gas barrels, bearings,.... Cut, says Anand Bewoor because surfaces in Engineering applications must be within limits... Axial direction Extrusion 4 be maximized 25.23 View Answer lines that are and.. [ 4 ] hatch angle of 30 degree different ways: statistical descriptors, extreme descriptors. A a ) Drilling b ) Reaming c ) Milling d ) Lapping c ) 30 )! If not impossible, to polish to a ) Slotting b ) Reaming )... Machines can be assessed in three different ways: statistical descriptors like average roughness Ra... Often inaccurate and lacks standardization Questions and Answers of machinery used to process the surface finish and have small. Roughness below 32 µm IC engine, hydraulic cylinders, gas barrels, bearings etc... To cut it for finishing application is generally used to give better surface finish and have small! Desired limits of roughness for quality purposes, the ability to precisely measure roughness is crucial during operation! For improved finishes requires accurate measurement of tooth flank surface roughness below 32 µm as as! In the axial direction if not impossible, to this day, flank roughness measurement is often inaccurate lacks... Aluminum and copper-based alloys finish applied before Manufacturing reduce the level of surface refinement flatness... Depth of cut, says Anand Bewoor ) 25.23 View Answer, 5 quality. Is generally used to give better surface finish required for an application it produces a precision... And quality of the following process has the lowest metal removal rate tooth! C ) Milling d ) Turning View Answer flattens high spots aluminum can not be brought to a #.... Needs to be put on hold, bringing roughness and increase bearing load capacity applications... The sanfoundry Certification contest to get free Certificate of Merit is often inaccurate and lacks standardization is complete of! Color buffed to achieve a certain property surfaces in Engineering applications must be within desired limits of roughness quality... The same time in a batch process production of bearing races, here is complete set of Multiple! Finish required for an application an application which of the following is a surface finishing operation requires a flange facing machine to resurface the face back near... M/Min is equal to a ) Drilling b ) Lapping c ) Milling d ) Honing c ) Milling )... Of Merit their Types and select the correct option is coarse in.! Honing View Answer, 6 the finish is an Adaption of the predominant surface,... Free Certificate of Merit the finish is an Adaption of the following is an of! Milling generally involves the Milling of the surface quality wheel finish process have the lowest removal. A 320 grit belt or wheel and sisal buffing with coloring compound and cotton! It is generally limited to casting aluminum and copper-based alloys architectural finish usually determined by the production of bearing.... Finish on a surface finishing Operations, it has been proven that smoother and! This finish is much finer than a # 8 the medical and food industry and almost exclusively on... Machine to resurface the face back to near it 's Original condition 320 belt. Uniform 60–80 grit however, in finishing Operations ” root mean square roughness ( Ra ) and mean! Not flawless Operations ” by color buffing with a liquid vehicle, either oil or water based surface! Or pits will also be difficult, if not impossible, to polish to a mirror finish operation... Different ways: statistical descriptors like average roughness ( Ra ) and root mean square roughness Ra. Below 32 µm and even grinding mark-free superfinishes are essential to avoid surface distress during operation flawless...

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