Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
6th Edition
ISBN: 9780134441184
Author: Robert L. Mott, Edward M. Vavrek, Jyhwen Wang
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 1, Problem 5P
For the devices described in Problems1−14, write a set of functions and design requirements in a similar manner to those in Section1−4. You or your instructor may add more specific information to the general descriptions given.
5. An automatic transfer device for a production line.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
1. Consider the assembly system shown below. All workstations on the main line have an
average time to failure of 1,000 cycles. Workstations on the feeder lines have an average time to
failure of 800 cycles. All workstations have an average time to repair of ten cycles. The buffer
has a capacity of 10 units. Find the availability of the line.
Table 3 shows the process sequence in a production line and its related direct
time study data. The production process must follow a specific route of
processes A, B, C, and D respectively. Task A is in full automatic mode and
requires one operator at the workstation. The worker at task B was rated with
90%, the worker at task C was rated with 115% and the worker at task D was
rated with 80%. The standard allowances accepted by the company are 6% for
fatigue, 5% for personal, and 4% for delay. The normal operating period is 8
hours per day and 24 days per month. Analyse the given information and
determine the standard time for the product in minutes.
Table 3: Average Processing Time (minutes)
Job
Description
Average
Processing Time
A
Automatic
B
Manual
40
C
Manual
30
D
Manual
35
1. (a) Determine the economic number of machines to assign an operator based on
the following:
Activity
Time(min)
Load
8
Unload
6.
Run (automatic)
92
Inspect and Package
3
Travel
Ci = $20/h; C2= $24/h
(b) What value of C/C2 is the break-even value for assigning n or n + 1
machines?
(c) What are the respective idle minutes per cycle for each (man and machine)
based on an assignment of one machine? Eight machines?
Chapter 1 Solutions
Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...
Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For Problems 1528, perform the indicated...Ch. 1 - For Problems 1528, perform the indicated...Ch. 1 - For Problems 1528, perform the indicated...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- a. Currently, you serve as a robotic engineer by a company, and your boss want you to design a robot in spatial space to satisfy the following conditions: i. Max reachable distance of the robot is 1 meter. ii. Only using revolute joints, connecting links and rigid load bearing links (the length of link is 0.5m). iii. The degree of freedom (Dof) of the robot is 2. What is your design, how many joints and links will you use? b. The payload of your design is 10 kg (each load bearing link can hold 5 kg, 5 kg+5 kg=10kg, the weight and payload of the connecting links will be ignored), but your boss wants your designed robots to handle 20 kg payload. How will you update your current design, and how many joints and links will you use in the new design? What is the Dof of the new designed robot.arrow_forwardAn engineer is designing a transfer line. The line has 15 stations. Stations 1 through 10 should have the same reliability. Each station is expected to operate approximately 1000 cycles between failures. The last 5 stations are expected to break down about once every 600 cycles. Repair times will vary but should average about the equivalent of 12 cycles in duration. a. Find the availability of the line. b. Suppose you could add one buffer of size 20. Where would you place this buffer? Find the increase in availabilityarrow_forwardA certain Batch manufacturing plant requires one operator to tend to 2 semiautomatic machines used in production. The plant operates one 10-hour shift per day for 250 days in a year. The operator is paid $30 per hour with applicable factory labor overhead rate of 50%. Other pertinent information about the system in include the information provided below. Determine the hourly cost of the system. Machine 1 Machine 2 Initial cost $125,000 $10,000 $5000 $150,000 $5000 $3000 Installation Yearly maintenance cost 10 years $5000 SL years $10,000 SV 20% 20% ROR 50% Applicable MOHR 30%arrow_forward
- Answer the two connected questions (Task A-1 and A-2). Provided in the last part are the guides and examples: The process for large-scale manufacture of paper has been largely unchanged for the last 125 years. The pulp and paper industry today is highly capital intensive, and there is an ongoing drive towards process integration, thereby increasing the efficiency of utilization of available process resources. This paper deals with the Kraft process (see Fig. 1) though the general principles described can be extended to other pulping processes. As shown in Figure 1, five water sinks and four water sources are considered for in-plant water reuse/ recycle. Prior to water reuse/ recycle, the network requires a freshwater flow rate of 36,400 tonne/day and generates 37,186 tonne/day of wastewater (sum of the individual sink and source flow rates in Table 1). The freshwater source that is available for service has an impurity concentration (chloride content) of 4.2 ppm, which is higher than…arrow_forward= Consider a four aisle AS/RS in which an S/R machine is used for each aisle. The length of the storage aisle 85 m and its height = 14 m. Suppose horizontal and vertical speeds of the S/R machine are 61 m/min and 23 m/min, respectively. The S/R machine requires 20 s to accomplish a P&D operation. The aisles in the AS/RS will be organized to follow a class-based dedicated storage strategy. There will be two classes, according to activity level. The more active stock is stored in the half of the rack system that is located closest to the input/output station, and the less active stock is stored in the other half of the rack system farther away from the input/output station. Within each half of the rack system, random storage is used. The more active stock accounts for 80% of the transactions, and the less active stock accounts for the remaining 20%. Assume that system utilization = 90%, and the number of single-command cycles = the number of dual-command cycles. Determine the throughput…arrow_forwardSpeed reduction, either through gearing or belt-pulley constructs, is an important element in motion system design. Similarly, converting rotary motion to linear motion is an important consideration. Considering a printer system driven by a stepper motor with 200 steps per revolution, construct a table that shows the relationships for: a. Position resolution of the print head vs. angular position of the motor. This translates to addressable print dots per mm vs. step angle. b. Print head speed (mm/S) vs. motor speed (Steps/S with rpm also noted) C. Frictional load at the print head (mN) vs. reflected torque at the motor (mNM) Mass of the print head vs. reflected inertia to the motor d. Use GR for Speed Reduction, r (mm) for the radius of the drive pulley, and m (grams) for print-head mass.. Belt Actuator Load Drive Pulley Secondary Pulley Linear Guide Belt Primary Pulley Motorarrow_forward
- INSTRUCTIONS: • Please write clearly and understandable way. Write all the corresponding GIVEN with their corresponding symbols and units. • List all the MISSING/REQUIRED, and list all the FORMULA that will be used. DRAW/ILLUSTRATE THE DIAGRAM/CIRCUIT OR DRAWINGS that is related to the problem, IF POSSIBLE, which is HIGHLY REQUIRED. • • The CONVERSION calculations with their corresponding symbols and units is required. • The problem's SOLUTION must be solved in a step-by-step, no shortcut, again, with their corresponding symbols and units. • BOXED the Final Answer. PROBLEM: A 500kg container van is being lowered into the ground when the wire rope supporting it suddenly breaks. The distance from which the container was picked up is 3m. Find the velocity just prior to the impact in m/s assuming the kinetic energy equals the potential energy. a) 5. 672 b) 6.672 c) 7.672 d) 8.672arrow_forwardAssignment 1: TIME VALUE OF MONEY Objective: To further understand the concept of the time value of money. INSTRUCTIONS: In each problem, a. Translate data given in problems into their respective graphical representations - i.e. draw the correct cash flow diagram. b. Write down all pertinent given information or data on your paper. c. Calculate answers correctly. 3. A certain college graduate, Sallie Evans, has $24,000 in student-loan debt at the end of her college career. The interest rate on this debt is 0.75% per month. If monthly payments on this loan are $432.61, how many months will it take for Sallie to repay the entire loan?arrow_forwardINSTRUCTIONS: Please write clearly and understandable way. Write all the corresponding GIVEN with their corresponding symbols and units. List all the MISSING/REQUIRED, and list all the FORMULA that will be used. • DRAW/ILLUSTRATE THE DIAGRAM/CIRCUIT OR DRAWINGS that is related to the problem, IF POSSIBLE, which is HIGHLY REQUIRED. The CONVERSION calculations with their corresponding symbols and units is required. The problem's SOLUTION must be solved in a step-by-step, no shortcut, again, with their corresponding symbols and units. • BOXED the Final Answer. PROBLEM: The compressor of a large gas turbine power plant receives 12kg/s of surrounding air at 95kPa and 20°C. At the compressor outlet, air exits at 1.52MPa, 430°C, Determine the flow energy requirements in MW. a) 1.412 b) 2.42 c) 1.01 d) 1.614arrow_forward
- The analyst in the Dorben Company wishes to assign a number of like facilities to an operator based on minimizing the cost per unit of output. A detailed study of the facilities revealed the following: Loading machine standard time = 0.30 minutes Unloading machine standard time = 0.25 minutes Walk time between two machines = 0.09 minutes Operator rate = $12.00 per hour Machine rate (both idle and working) = $18.00 per hour Machine cycle time = 1.55 minutes TEC = The Expected Cost a) With your initial estimation, how many machines can be serviced exactly?(please keep a non-integer with three decimal places) b) How much is your TEC per piece if the operator has idle time? (please keep three decimal places) c)How much is your TEC per piece if the machine has idle time? (please keep three decimal places) d) How many of these machines should be assigned to each operator?(please write down a numerical number)arrow_forwardThe analyst in the Dorben Company wishes to assign a number of like facilities to an operator based on minimizing the cost per unit of output. A detailed study of the facilities revealed the following: Loading machine standard time = 0.30 minutes Unloading machine standard time = 0.25 minutes Walk time between two machines = 0.09 minutes Operator rate = $12.00 per hour Machine rate (both idle and working) = $18.00 per hour Machine cycle time = 1.55 minutes a) with your initial estimation, how many machines can be serviced exactly? with three decimal places) b) How much is your TEC if the operator has idle time? $ c) How much is your TEC if the machine has idle time? $ (please keep a non-integer per piece (please keep three decimal places) d) How many of these machines should be assigned to each operator? per piece (please keep three decimal places) (please write down a numerical number)arrow_forwardPlease show a step by step solution thankyouarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Fluid Mechanics - Viscosity and Shear Strain Rate in 9 Minutes!; Author: Less Boring Lectures;https://www.youtube.com/watch?v=_0aaRDAdPTY;License: Standard youtube license