Anonymous
timer Asked: Apr 28th, 2020

Question Description

I have this lab, and the handout docs that my TA handed to us will be in a different docs, other docs needs to be done as well I combined them together in one pdf file+ there is a docs that explain how my TA wants the technical report done and what parts she want us to cover in the technical lab report the file name is ((labform))

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MOTION ECONOMY CHECKLIST Suboperations Yes No “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ 1. Can a suboperation be eliminated? a. As unnecessary? b. By a change in the order of the work? c. By a change of tools or equipment? d. By a change in layout of the workplace? e. By combining tools? f. By a slight change of material? g. By a slight change in product? h. By a quick-acting clamp on the jigs or fixtures? 2. Can a suboperation be made easier? a. By better tools? b. By changing leverages? c. By changing positions of controls or tools? d. By better material containers? e. By using inertia where possible? f. By lessening visual requirements? g. By better workplace heights? Movements “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No 1. Can a movement be eliminated? a. As unnecessary? b. By a change in the order of work? c. By combining tools? d. By a change in tools or equipment? e. By a drop disposal of finished material? 2. Can a movement be made easier? a. By a change in layout, shortening distances? b. By changing the direction of movements? c. By using different muscles? Use the first muscle group that is strong enough for the task: (1) Finger? (2) Wrist? (3) Forearm? (4) Upper arm? (5) Trunk? d. By making movements continuous rather than jerky? Holds “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No 1. Can a hold be eliminated? (Holding is extremely fatiguing.) a. As unnecessary? b. By a simple holding device or fixture? 2. Can a hold be made easier? a. By shortening its duration? b. By using stronger muscle groups, such as the legs with foot-operated vises? “ “ “ “ “ “ “ “ “ “ “ “ Motion Economy Checklist - Page 1 of 2 Delays Yes No 1. Can a delay be eliminated or shortened? a. As unnecessary? b. By a change in the work each body member does? c. By balancing the work between the body members? d. By working simultaneously on two items? e. By alternating the work, each hand doing the same job, but out of phase? Cycles 1. Can the machine time be shortened? a. By better tools? b. By combined tools? c. By higher feeds or speeds? “ “ “ “ “ “ Yes No 1. Can the cycle be rearranged so that more of the handwork is done during running time? a. By automatic feed? b. By automatic supply of material? c. By change of man and machine phase relationship? d. By automatic power cutoff at completion of cut or in case of tool or material failure? Machine Time “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No “ “ “ “ “ “ “ “ Motion Economy Checklist - Page 2 of 2 MTM Methods Analysis Page Operation: Remarks: Study No.: Date: Analyst: Description No. LH Total TMU: Summary TMU RH No. Conversion: Description % Allowance: Standard time: of SETUP AND TOOLING EVALUATION CHECKLIST Fixtures Yes No 1. Can the same fixture be used for other products? 2. Can the fixture be made similar to some other that has been used advantageously? If so, how can it be improved? 3. Can any stock hardware be used for making the fixture? 4. Can the output be increased by placing more than one part in the fixture? 5. Can the chips be readily removed from the fixture? 6. Are the clamps on the fixture strong enough to prevent them from buckling when they are tightened down on the work? 7. Can regular wrenches be used with the fixture? 8. Can special milling cutters, arbors, or collars be avoided? 9. Are indexing arrangements accurate for rotary type fixtures? 10. Can the fixture be used on a standard rotary indexing head? 11. Can the fixture be made to handle more than one operation? 12. Is the work as close to the miller’s table as possible? 13. Can the work be gaged in the fixture? Can a snap gage be used? 14. Can jack pins be used to help support the work while it is being milled? 15. Have springs been placed under all clamps? 16. Are all steel contact points, clamps, etc., hardened? 17. Are the simplest class of jigs being utilized? 18. Is a double or triple thread used on the screw that holds the work in the jig, so that it will take fewer turns to get the screw out of the way, to remove the part more quickly? 19. Can the toolmaker make the jig? 20. Are the legs on the jig long enough to allow the drill, the reamer, or the pilot of the reamer to pass through the part a reasonable distance without striking the table of the drill press? 21. Is the jig light enough, to handle easily? 22. Is the jig identified with both a location number for storing and a part number that identifies the part or parts that the jig helps produce? 23. Is the work adequately supported so that the clamping force will not bend or distort it? Parts “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No 1. Has the part undergone any previous operations? If so, can any of these surfaces be used to locate or master from? 2. Can the part be quickly placed in the fixture? 3. Can the part be quickly removed from the fixture? 4. Is the part held firmly so that it cannot work loose, spring, or chatter while the cut is being made? (The cut should be against the solid part of the fixture and not against the clamp.) 5. Can the part be milled in a standard vise, thus doing away with an expensive fixture? 6. If the part is to be milled at an angle, can the fixture be simplified by using a standard adjustable milling angle? 7. Can lugs be cast on the part to be machined, for better grip? 8. Have notes been made on the drawing, or all loose parts stamped, indicating the jig they were made for, so that lost or misplaced parts can be returned to the jig when found? 9. Are all necessary corners rounded? “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Setup & Tooling Eval. Checklist - Page 1 of 2 Drills 1. 2. 3. 4. 5. 6. 7. Yes No Is the thrust of the drill taken up by the fixture? Can jack pins or screws be used to support the work while it is being drilled? Are the drill bushings short enough so that extension drills are not necessary? Are all clamps located in such a way as to resist or help resist the pressure of the drill? Has the drill press the necessary speeds for drilling and reaming all holes? Can drill-press tapping attachments be avoided? Drilling and reaming several small holes and only one large one in the jig is not practical since quicker results can be obtained by drilling the small holes on a small drill press, while having only one large one would require the jig to be used on a large machine: a. Is it cheaper to drill the large hole in another jig? b. Will the result of doing so be accurate enough? Others “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No 1. Can a gage be designed, or hardened pins added, to help the operator set the milling cutters or check up on the work? “ 2. Is there plenty of clearance for the arbor collars to pass over the work without striking? “ “ “ Setup & Tooling Eval. Checklist - Page 2 of 2 THERBLIG ANALYSIS CHECKLIST Reach and Move Yes No 1. 2. 3. 4. 5. 6. 7. 8. Can either of these therbligs be eliminated? Can distances be shortened to advantage? Are the best means (conveyors, tongs, tweezers) being used? Is the correct body member (fingers, wrist, forearm, shoulder) being used? Can a gravity chute be employed? Can transports be effected through mechanization and foot-operated devices? Will time be reduced by transporting in larger units? Is time increased because of the nature of the material being moved or because of a subsequent delicate positioning? 9. Can abrupt changes in direction be eliminated? Grasp Would it be advisable for the operator to grasp more than one part or object at a time? Can a contact grasp be used rather than a pickup grasp? In other words, can objects be slid instead of carried? Will a lip on the front of bins simplify grasping small parts? Can tools or parts be pre-positioned for easy grasp? Can a vacuum, magnet, rubber fingertip, or other device be used to advantage? Can a conveyor be used? Has the jig been designed so that operators may grasp the part easily when removing it? Can the previous operator pre-position the tool or the work, simplifying grasp for the next operator? 10. Can tools be pre-positioned on a swinging bracket? 11. Can the work table surface be covered with a layer of sponge material so that the fingers can enclose small parts more easily? Release “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No 1. 2. 3. 4. Can the release be made in transit? Can a mechanical ejector be used? Are the bins that contain the part after its release the proper size and design? At the end of the therblig release, are the hands in the most advantageous position for the next therblig? 5. Can multiple units be released? Pre-Position “ “ “ “ “ “ “ “ “ “ Yes No 1. Can a holding device at the workstation keep tools in the proper positions and the handles in upright positions? 2. Can tools be suspended? 3. Can a guide be used? 4. Can a magazine feed be used? 5. Can a stacking device be used? 6. Can a rotating fixture be used? 1. 2. 3. 4. 5. 6. 7. “ “ “ “ “ “ “ Yes No 1. 2. 3. 4. 5. 6. 7. 8. 9. Use “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No Can a jig or fixture be used? Does the activity justify mechanized or automated equipment? Would it be practical to make the assembly in multiple units? Can a more efficient tool be used? Can stops be used? Is the tool being operated at the most efficient feeds and speeds? Should a power tool be employed? “ “ “ “ “ “ “ “ “ “ “ “ “ “ Therblig Analysis Checklist - Page 1 of 2 Search 1. 2. 3. 4. 5. 6. Yes No “ “ “ “ “ “ Are articles properly identified? Perhaps labels or color could be utilized? Can transparent containers be used? Will a better layout of the workstation eliminate searching? Is proper lighting being used? Can tools and parts be pre-positioned? Select 1. 2. 3. 4. Yes No “ “ “ “ Are common parts interchangeable? Can tools be standardized? Are parts and materials stored in the same bin? Can parts be pre-positioned in a rack or tray? Position Inspect Can inspection be eliminated or combined with another operation or therblig? Can multiple gages or tests be used? Will inspection time be reduced by increasing the illumination? Are the articles being inspected at the correct distance from the worker's eyes? Will a grazing light accentuate defects and facilitate inspection? Would an electric eye be useful? Does the volume justify automatic electronic inspection? Would a magnifying glass facilitate the inspection of small parts? Is the best inspection method being used? Has consideration been given to polarized light, template gages, sound tests, performance tests, and so on? “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No Is the best order-of-muscles classification being used? Are temperature, humidity, ventilation, noise, light, and other working conditions satisfactory? Are benches of the proper height? Can the operator alternately sit and stand while performing work? Does the operator have a comfortable chair of the right height? Are mechanical means being used for heavy loads? Is the operator aware of his or her average intake requirements in calories per day? Hold 1. 2. 3. 4. “ “ “ “ “ “ Yes No Rest to Overcome Fatigue 1. 2. 3. 4. 5. 6. 7. “ “ “ “ Yes No 1. Can such devices as a guide, funnel, bushing, stop, swinging bracket, locating pin, recess, key, pilot, or chamfer be used? 2. Can tolerances be changed? 3. Can the hole be counterbored or countersunk? 4. Can a template be used? 5. Can the elimination of burrs decrease the problem of positioning? 6. Can the article be pointed to act as a pilot? 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No Can a mechanical jig, such as a vise, pin, hook, rack, clip, or vacuum, be used? Can friction be used? Can a magnetic device be used? Should a twin holding fixture be used? “ “ “ “ “ “ “ “ Therblig Analysis Checklist - Page 2 of 2 Two-Hand Process Chart Page Operation: Part: Summary Operator Name and No.: Effective Time: Analyst: Date: Method (circle choice): Present Ineffective Proposed Cycle Time = Sketch: Left Hand Description Sym- Time bol Time Symbol of Left Hand Right Hand Right Hand Description 5. Have resilient, fatigue-resistant mats been supplied to standing operators? :25.(19,5210(17&+(&./,67 ,OOXPLQDWLRQ • 90E)? b. Is a keyboard shelf utilized (i.e., lower than a normal 28 inch writing surface)? c. Is the keyboard sloped downward so as to maintain a neutral wrist position? d. Is the mouse positioned next to the keyboard at the same height? e. Are armrests (adjustable in height at least 5 inches) provided? f. If no armrests, are wrist rests provided? 3. Is the monitor positioned 16 to 30 inches (roughly arm’s length) from the eyes? a. Is the top of the screen slightly below eye level? b. Is the bottom of the screen roughly 30E down from horizontal eye level? c. Is the monitor positioned at a 90E angle to windows to minimize glare? d. Can the windows be covered with curtains or blinds to reduce bright light? e. Is the monitor tilted to minimize ceiling light reflections? f. If glare still exists, is an antiglare filter utilized? g. Is a document holder utilized for data transfer from papers? h. Is the main visual task (monitor or documents) placed directly in front? Standing Workstation 1. Is the workstation surface adjustable? a. Is the workstation surface roughly at elbow rest height? b. Is the surface lowered 4 to 8 inches for heavy assembly? c. Is the surface raised 4 to 8 inches (or tilted) for detailed assembly or visually intensive tasks? 2. Is there sufficient legroom? 3. Is a sit/stand stool (adjustable in height) provided? 4. Is standing alternated with sitting? Yes No “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ “ Yes No “ “ “ “ “ “ “ “ “ “ “ “ “ “ CTD Risk Index Job Title: VCR Counter No.: Date: Job Description: Department: Analyst: Cycle Time (in minutes; obtain from videotape) # Cycle/Day = â ä ãa = Larger of ãa or ãb: # Parts / Day (if known) # Handmotions / Cycle # Handmotions / Day (ä x å) ãb å æ Frequency Factor (Divide æ by 10,000) = (Circle appropriate condition) Working Posture Hand Posture 1: Pulp Pinch Hand Posture 2: Lateral Pinch Hand Posture 3: Palm Pinch Hand Posture 4: Finger Press Hand Posture 5: Power Grip Type of Reach Hand Deviation 1: Flexion Hand ...
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