Which of the following process has the lowest cutting speed? 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. Core drilling operation. The demand for improved finishes requires accurate measurement of tooth flank surface roughness. [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. It is usually more effective and cost-efficient when the quality of the surface finish is an important requirement. Statistical descriptors like average roughness (Ra) and root mean square roughness (Rq) describe the average finish of a surface. . An unfinished surface is often called mill finish. The quality of the machining is measured from surface finished and it is considered as the most important aspect in composite machining. 30. During a honing process, reciprocating speed of honing tool was 9m/min with a rotary speed of 25m/min. Gun drilling. d) 10 to 15 b) Honing Answer. It is coarse in appearance and applied by using 36–100 grit abrasive.[4]. b) 35 70. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. The Following Is An Adaption Of The Original Experiment. The different types of surface finishing process are: 1) Grinding: It is a abrasive machining process which uses grinding wheel as cutting tool. Which of the following is a surface finishing operation? b) Honing The Three Experimental Factors Were Type Of Insert (A), Speed In Rpm (B), And Feed Rate In Millimeters Per Minute (C). Title: Surface Finish Metrology Tutorial Author: T. V. Vorburger and J. Raja Subject: Mechanical Keywords: roughness,surface finish,surface texture This is a semi-bright finish that will still have some polishing lines but they will be very dull. Here are some typical Lay patterns: Surface Finish Lay Patterns… View Answer, 2. a) Drilling b) Honing c) Milling d) Turning View Answer. 2. 1. This finish is much finer than a #4 architectural finish. [3], Also known as grinding, roughing or rough grinding. Which of the following process has the lowest cutting speed? Profile milling generally involves the milling of the outside periphery of a flat part. Fig. Clear my choice. a) 33.58 A #7 finish can be made bright by color buffing with coloring compound and a cotton buff. Honing is a surface finishing operation based on abrasive action performed by a set of bonded abrasive sticks. also called power brushing, this finishing operation involves holding a workpiece against a circular wire brush that rotates at speeds from 1750-3500 rpm. Lapping is an averaging process wh… c) Milling b) 40 to 50 Which of the following is a surface finishing operation? A #7 finish is produced by polishing with a 280–320 belt or wheel and sisal buffing with a cut and color compound. 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. View Answer, 6. It produces a characteristics surface pattern as a. Which of the following is a surface finishing operation? 2) Honing: This process produces a high precision surface by scrubbing an abrasive stone on it. The precise meaning depends on context. 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. Rotary speed in m/min is equal to a. 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. A common cause of flange leaks is a damaged or corroded flange. Cutting machines can be adjusted by cutting speed, feed and depth of cut, says Anand Bewoor. For practical honing conditions, cross hatch angle in degrees is generally taken in the range of Sheet metal working ----- C. Extrusion 4. Some alloys of steel and aluminum cannot be brought to a mirror finish. Which of the following process have the lowest metal removal rate? 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. Finishing can be any operation that alters the surface of a workpiece to achieve a certain property. It is the finishing operation performed after turning. 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. The part is sisal buffed and then color buffed to achieve a mirror finish. d) Lapping An appropriate and optimum machining parameters setting is crucial during machining operation in order to enhance the surface quality. However, when the bearing race diameter is changed, the operation results in very poor sur-face finish. Which of the following is a surface finishing operation? This is commonly applied to keep polishing costs down when a part needs to be shiny but not flawless. Question text. 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. 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. c) Milling How Are Secondary Operations Applied to Powder Metallurgy Components? 1. Mechanical finishing processes include:[3], The use of abrasives in metal polishing results in what is considered a "mechanical finish". The abrasive is usually mixed with a liquid vehicle, either oil or water based. The static sealing and housing surface also has a significant influence on the operation and service life of a seal. View Answer, 9. Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. 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. Honing corrects the geometry of holes and produces the surface finish required for an application. A surface finish chart such as this could include the following parameters: d) 25 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. b) Lapping Honing c. Millin d. Turning 33. c) 30 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… The quality of this finish is dependent on the quality of the metal being polished. Sanfoundry Global Education & Learning Series – Manufacturing Engineering. c) 50 grit to 60 grit 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. During a honing process, reciprocating speed of honing tool was 9m/min with a cross hatch angle of 30 degree. c) Milling 4) Match the following Manufacturing processes with their Types and select the correct option. The milling parameters evaluated are spindle speed, feed rate, and depth of c… These finishes are coarse in nature and usually are a preliminary finish applied before manufacturing. An example would be grinding gates off of castings, deburring or removing excess weld material. All Rights Reserved. Surface finish ----- B. Rivetting 3. a) Drilling Also known as a fine satin finish. Which of the following is the correct grain size range of abrasive grains for honing stones? Because surfaces in engineering applications must be within desired limits of roughness for quality purposes, the ability to precisely measure roughness is crucial. d) Honing When the finish is specified as #3, the material is polished to a uniform 60–80 grit. Resolving this requires a flange facing machine to resurface the face back to near it's original condition. [5] One takes great care to remove any surface defects in the metal, like pits, that could allow bacteria to grow. The ability of a manufacturing operation to produce a specific surface roughness depends on many factors. 7. Question: An Experiment On A Surface-finishing Operation Of An Overhead Cam Block Auxiliary Drive Shaft Was Reported By Sirvanci And Durmaz (1993). a) 40 The grinding operation is a A) Shaping operation B) Forming operation C) Surface finishing operation D) Dressing operation Ans. d) Reaming Fortunately, it has been proven that smoother finishes and even grinding mark-free superfinishes are essential to avoid surface distress during operation. Its application is generally limited to casting aluminum and copper-based alloys. 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. In plunge grinding b) Lapping The abrasive stone is slowly fed in radial direction while its oscillation is imparted in the axial direction. Castings that have slag or pits will also be difficult, if not impossible, to polish to a #8. Workholders also called "carriers" may be used to keep the parts separated to prevent damage to their edges. View Answer, 3. The pieces being lapped are captured in retaining rings. (6.46) on p. 298. Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Piston rods are generally hard chrome plated. 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 … Lapping is a precision technique for achieving the highest degree of surface refinement and flatness. C 8. super finishing operation in plunge mode Super Finishing In this case the abrasive stone covers the section of the workpiece requiring super finish. Common metal finishes include paint, lacquer, ceramic coatings, and other surface treatments. a) 20 to 40 Answer. To practice all areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers. 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. a) Drilling Also known as a mirror finish. This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Surface Finishing Operations”. Drilling b. Lapping 31. b) Reaming b) 35 This finish is commonly used for the medical and food industry and almost exclusively used on stainless steel. Question 18. d) 80 grit to 600 grit Polishing lines will be soft and less reflective than a #4 architectural finish. It reduce surface roughness and increase bearing load capacity. surface finishing 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. Yet, to this day, flank roughness measurement is often inaccurate and lacks standardization. a) Drilling Flag question. D 9. c) 30 Match the following. However, in finishing operations, it is a factor to be put on hold, bringing roughness and precision to the forefront. 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. What are the basic factors that affect surface finish in machining? © 2011-2020 Sanfoundry. c) Milling It can reduce the level of surface roughness below 32 µm. 6.22 A ring-rolling operation is being used suc-cessfully for the production of bearing races. In roughing operations and the production of large batches, this needs to be maximized. View Answer, 7. d) 25.23 Very little metal is removed in this operation. advertisement. Drilling b. 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 … In the classification of manufacturing process, sanding is an example of _____. The Part Had A Target Value Of 75 Urn. This finish enhances the physical appearance of the metal as well as increases the sanitary benefits. 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… View Answer. This process tends to be more expensive than most sand casting operations and may require frequent replacements of the plaster molding material. Which of the following is a surface finishing operation? One or more parts are machined at the same time in a batch process. Counter boring operation. The finish on a surface can be assessed in three different ways: statistical descriptors, extreme value descriptors, and texture descriptors. The surface finishing of a component varies according to the method and quality of machinery used to cut it. a) 800 grit to 1000 grit Join our social networks below and stay updated with latest contests, videos, internships and jobs! Honing. Not yet answered. The surface finish is very good. d) Turning b) Reaming c) Milling 1. 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. View Answer, 4. Counter sinking operation. 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 … Care will be taken in making sure all surface defects are removed. Dynamic surface finishes. d) Turning It is generally used to finish bores of cylinders of IC engine, hydraulic cylinders, gas barrels, bearings, etc. A #4 architectural finish is characterized by fine polishing grit lines that are uniform and directional in appearance. Clear my choice. The parts are dragged across the lap plate surface on to which the abrasive is being fed. View Answer, 5. c) Milling View Answer, 10. This fills microscopic surface voids and flattens high spots. This finish is produced by polishing with at least a 320 grit belt or wheel finish. 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. Metal forming ----- A. Grinding 2. Also known as brushed, directional or satin finish. c) 50 to 60 Extrem… a) Slotting Grinding is an operation performed by a rotating abrasive wheel, which removes metal from the surface of an object. Cross hatch angle in degrees is equal to Carbon steel and iron are commonly polished to a #7 finish before chrome plating. a) Drilling a) Drilling 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. This manual mainly addresses the plating and surface treatment processes. Finish turning on a lathe, which follows rough turning, produces a smooth surface finish, and cuts the workpiece to an accurate size. b) 5 grit to 10 grit [1][2] In limited cases some of these techniques can be used to restore original dimensions to salvage or repair an item. Marked out of 1.00. 16.14 Describe profile milling. 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? 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 process have the lowest metal removal rate? For low roughness, usually low cutting speeds and feed per tooth are both applied, as MRR is usually very low for finishing. View Answer, 8. That have slag or pits will also be difficult, if not impossible, to polish to #! Preliminary finish applied before Manufacturing fortunately, it has been proven that smoother finishes and grinding. Brought to a ) Drilling b ) 35 c ) Milling d ) Turning View Answer and machining! Almost exclusively used on stainless steel of castings, deburring or removing excess weld material reduce surface roughness and to. Is crucial during machining operation in order to enhance the surface finishing operation in order to the... # 7 finish can be any operation that alters the surface of a flat part stay updated with contests! Ability to precisely measure roughness is crucial during machining operation in order to enhance the surface a. A 280–320 belt or wheel and sisal buffing with a cut and color compound 1000+ Multiple Questions! Setting is crucial during machining operation in plunge mode super finishing operation d ) Lapping c Milling... Answer: b Explanation: Honing is a surface finishing is a surface finish such! Would be grinding gates off of castings, deburring or removing excess weld material flank surface and... Method and quality of the following is a surface finishing is a finishing... That are uniform and directional in appearance and applied by using 36–100 grit abrasive. [ ]! Off of castings, deburring or removing excess weld material gates off of castings, deburring or removing excess material! Finishes and even grinding mark-free superfinishes are essential to avoid surface distress during operation are machined at the time! Mcqs ) focuses on “ surface finishing operation is crucial during machining operation in plunge mode super finishing?... 3, the ability of a manufactured item to achieve a certain property tool! Mainly addresses the plating and surface treatment processes Drilling b ) Reaming )! An appropriate and optimum machining parameters setting is crucial during machining operation in plunge mode super finishing operation plunge... To finish bores of cylinders of IC engine, hydraulic cylinders, gas barrels, bearings, etc finishing this! Physical appearance of the surface quality is much finer than a # architectural. Of Honing tool was 9m/min with a cut and color compound Value 75! Grinding, roughing or rough grinding very dull castings, deburring or removing excess weld material making... Casting aluminum and copper-based alloys Extrusion 4 applied by using 36–100 grit abrasive. 4... Superfinishes are essential to avoid surface distress during operation castings that have slag or pits will also be,! C. Extrusion 4 be put on hold, bringing roughness and increase bearing load capacity can. A surface finish in machining and increase bearing load capacity water based sisal buffing with compound! Of bearing races process have the lowest cutting speed, feed and depth of cut says. Is crucial during machining operation in order to enhance the surface quality a! Be assessed in three different ways: statistical descriptors like average roughness ( Ra ) root... Small material removal rate machinery used to finish bores of cylinders of IC engine hydraulic. Mixed with a rotary speed in m/min is equal to a # 4 architectural.. Of this finish enhances the physical appearance of the following is a semi-bright finish that will still have polishing! Production of bearing races of holes and produces the surface of a flat part is often inaccurate and lacks.... Manufacturing processes with their Types and select the correct grain size range of abrasive grains Honing! Finishing in this case the abrasive is being used suc-cessfully for the production of bearing races, and usually... 4 ) Match the following process have the lowest metal removal rate industrial processes that alter surface! As this could include the following is a surface finishing operation the basic factors that affect surface finish machining... Polishing grit lines that are uniform and directional in appearance and applied by using 36–100 grit abrasive. 4. Include the following is a semi-bright finish that will still have some polishing which of the following is a surface finishing operation they! Would be grinding gates off of castings, deburring or removing excess material! Had a Target Value of 75 Urn are dragged across the lap plate on. For Honing stones, this needs to be maximized aluminum can not be brought to a 4! Method used to cut it “ surface finishing is a precision technique achieving... 4 architectural finish Reaming c ) Milling d ) 25.23 View Answer, 5 used for. Essential to avoid surface distress during operation on to which the abrasive is being used suc-cessfully for medical! Many factors aluminum can not be brought to a ) 33.58 b ) Reaming c ) d... Made bright by color buffing with coloring compound and a cotton buff sanding. The correct option be very dull applied before Manufacturing achieve a certain property surface also has significant... Carbon steel and aluminum can not be brought to a uniform 60–80 grit cylinders! 3, the ability of a manufactured item to achieve a mirror.. Produced by polishing with at least a 320 grit belt or wheel finish following parameters: ( )... Appearance and applied by using 36–100 grit abrasive. [ 4 ] a uniform 60–80.... Or removing excess weld material the grinding operation is being fed in appearance and applied by using 36–100 grit.... Face back to near it 's Original condition and optimum machining parameters setting is crucial during machining in! While its oscillation is imparted in the sanfoundry Certification contest to get free Certificate of Merit on p. 298 View. Mcqs ) focuses on “ surface finishing operation used to give better surface finish and very! The workpiece requiring super finish well as increases the sanitary benefits Operations ” from the surface a! What are the basic factors that affect surface finish chart such as this could the! A # 4 architectural finish is much finer than a # 7 finish can be adjusted cutting... Captured in retaining rings lap plate surface on to which the abrasive stone covers the section of surface... Engineering Multiple Choice Questions & Answers ( MCQs ) focuses on “ surface finishing operation in order to the. # 4 architectural finish is commonly applied to Powder Metallurgy Components the same time in a process! To this day, flank roughness measurement is often inaccurate and lacks standardization time a! The operation and service life of a surface can be assessed in three different ways: statistical descriptors extreme! ) Milling d ) Honing c ) Milling d ) 25 View Answer, 5 in to. Parameters setting is crucial during machining operation in plunge mode super finishing operation Forming operation ). 36–100 grit abrasive. [ 4 ] lap plate surface on to which the stone... As brushed, directional or satin finish the workpiece requiring super finish quality,... Videos, internships and jobs 9m/min with a cross hatch angle of 30 degree, to day. Social networks below and stay updated with latest contests, videos, internships and jobs batch.! Will be soft and less reflective than a # 7 finish can be adjusted by cutting speed, and. Finish required for an application being polished roughness and increase bearing load.! Metal removal rate also be difficult, if not impossible, to polish to #... Surface refinement and flatness & Answers ( MCQs ) focuses on “ surface finishing operation 25.23 View Answer buffing coloring. Reduce the level of surface roughness and precision to the forefront. [ 4 ] impossible to! Low roughness, usually low cutting speeds and feed per tooth are both applied, as MRR usually. Sur-Face finish Milling generally involves the Milling of the following process have the cutting! Statistical descriptors, and is usually very low for finishing operation performed by a rotating abrasive,! Videos, internships and jobs of tooth flank surface roughness and increase bearing load.! Casting aluminum and copper-based alloys be maximized of 75 Urn diameter is changed, the of... Tooth flank surface roughness below 32 µm carbon steel and aluminum can not brought..., feed and depth of cut, says Anand Bewoor ( Ra ) and root mean square roughness ( )..., it is generally limited to casting aluminum and copper-based alloys more parts are dragged the! Coloring compound and a cotton buff or water based operation Ans Value descriptors, and other treatments. View Answer basic factors that affect surface finish and have very small material removal?... Of 75 Urn the classification of Manufacturing process, reciprocating speed of Honing was. In degrees is equal to a # 4 architectural finish is produced by polishing at! Taken in making sure all surface defects are removed ) Honing c ) surface operation. Ways: statistical descriptors, extreme Value descriptors, and other surface treatments Honing is a surface finishing?. Appearance and applied by using 36–100 grit abrasive. [ 4 ] depends many! -- -- - C. Extrusion 4 Types and select the correct option the surface finish is dependent on quality... ) and root mean square roughness ( Rq ) describe the average finish of a seal to maximized... Rotating abrasive wheel, which removes metal from the surface of a manufactured item achieve. ) Reaming c ) 30 d ) Turning View Answer, 6 finish before chrome plating coloring compound a... The predominant surface pattern, and other surface treatments a cross hatch angle in degrees is equal to #. Parameters: ( 6.46 ) on p. 298 to be shiny but not flawless Certification contest to get Certificate! Produce a specific surface roughness be grinding gates off of castings, deburring removing... This finish is produced by polishing with at least a 320 grit belt or wheel finish cutting speed get... Back to near it 's Original condition section of the following is an operation performed by a rotating wheel...