Lab 2 Micrometer Instruments

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Conestoga College *

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Course

8280

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Mechanical Engineering

Date

Apr 3, 2024

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docx

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7

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M ETROLOGY IN MANAGEMENT QUAL -8280 L AB 2: M ICROMETER INSTRUMENTS Name: Timothy Agbo Student number: 8845535 Lab 1 Program: Quality Assurance in Manufacturing and Management Sce-10
Lab 2 Micrometer Instruments Prerequisite: Chapter 7, Micrometer Instruments Introduction: The increased precision of micrometers allows them to be used for a number of diverse measurements, primarily those dealing with some form of inside or depth measurement. Micrometers may incorporate a standard four-digit mechanical readout or have a digital readout. The purpose of this lab is to explore the general use of the standard mechanical readout micrometer, to affirm how to read the measurement to the fourth decimal place, and to take measurements and understand the variations that can occur with individual users and among multiple users. Compare with the Digital Micrometer measurements. Items needed: Data recording tools A set of standard SAE gauge blocks. Three numbered Mega Blok’s™ per group to be used by each member for measuring. One to two-inch Mechanical Micrometers and one to two-inch Digital Micrometers One-inch micrometer standard and a spanner wrench Cleaning solution (lubricant), 2 Lint-Free cloths (1 with cleaning solution, 1 dry) L AB 5 21 Name: Date: E XERCISE 1 Observation: Familiarize yourself with the micrometer provided to you for this lab. The instructor will review the proper procedure, the measurement technique, and how to read the instrument. Follow your instructor’s instructions for verifying the zero point. Use the one-inch Micrometer Standard to verify the micrometer is set correctly. E XERCISE 2 Calibration: THIS IS FOR THE WHOLE GROUP. Using a one-inch gage block, then a two-inch gauge block, take two readings with each to check the accuracy of the instrument. Compare your readings with those of the other students in your group. Are there variations? Did all students measure the same gage
blocks? What are the possible reasons for variations, if any? Operator 1 Operator 2 Operator 3 Height(inch ) width(inch ) Height(inch ) Width(inch ) Height(inch ) Width(inch ) 1.525 1.238 1.522 1.235 1.522 1.235 1.526 1.234 1.523 1.236 1.521 1.234 1.525 1.236 1.523 1.234 1.522 1.234 1. From the readings there are variations in the readings among the three operators, both for height and width measurements. None of the operators consistently measured the same value. This indicates that there are differences in the measurements taken by each operator. 2. Yes, all students measured the gage blocks. 3. Possible Reasons for Variations: Several factors can contribute to variations in measurements in such experiments: Instrument Calibration: If the measuring instruments are not well-calibrated, this can lead to variations in readings. It's essential to ensure that the gauge blocks are correctly calibrated. Operator Technique: The skill and experience of the operators can influence the measurements. Variations can occur due to differences in how each operator handles the instruments and reads the measurements. Environmental Factors: Changes in temperature and humidity can affect the dimensions of materials, including gauge blocks. Variations may result from environmental conditions. Instrument Precision: The precision of the measuring instruments also plays a role. Even small differences in instrument precision can lead to variations in measurements. Wear and Tear: Gauge blocks can wear over time, leading to inaccuracies. It's important to regularly inspect and maintain these tools. Human Error: Mistakes in recording measurements can occur, which can lead to variations in the data. Surface Cleanliness: Contaminants or imperfections on the surfaces of the gauge blocks can lead to inaccurate measurements. To minimize variations and increase the accuracy of measurements in experiments like this, it's essential to focus on operator training, instrument maintenance, and proper calibration. Additionally, repeating measurements and averaging the results can help reduce the impact of random errors. It's also crucial to ensure that all operators are following the same
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measurement protocols and using consistent techniques. E XERCISE 3 Measurements: THIS IS FOR THE WHOLE GROUP. Using your assigned micrometers (mechanical and digital), measure and record all the Widths and Heights of three Mega Blok’s™, keeping a detailed record of which measurement corresponds to a specific l ocation on the Width and Height of the 3 Mega Blok’s™, taking 3 readings for each per Blok, per micrometer. Part 1 Part 2 Part 3 Height(inch ) width(inch ) Height(inch ) Width(inch ) Height(inch ) Width(inch ) 1.525 1.235 1.522 1.235 1.522 1.235 1.526 1.234 1.523 1.236 1.521 1.234 1.525 1.236 1.523 1.234 1.522 1.234 1.526 1.235 1.522 1.236 1.522 1.234 1.525 1.234 1.523 1.235 1.521 1.234 1.525 1.236 1.524 1.236 1.522 1.235 1.526 1.236 1.524 1.234 1.521 1.235 1.522 1.234 1.523 1.234 1.522 1.234 1.526 1.235 1.522 1.234 1.522 1.235
22 L AB 5 E XERCISE 4 THIS IS FOR THE WHOLE GROUP. With your group of students, using the Data from Exercise 3. Explain why there is variation, if any. EX: if there are 4 in your group, there will be 36 Widths and 36 Heights. Part 1 Part 2 Part 3 Height(inc h) width(inc h) Height(inc h) Width(inc h) Height(inc h) Width(inc h) 1.525 1.235 1.522 1.235 1.522 1.235 1.526 1.234 1.523 1.236 1.521 1.234 1.525 1.236 1.523 1.234 1.522 1.234 1.526 1.235 1.522 1.236 1.522 1.234 1.525 1.234 1.523 1.235 1.521 1.234 1.525 1.236 1.524 1.236 1.522 1.235 1.526 1.236 1.524 1.234 1.521 1.235 1.522 1.234 1.523 1.234 1.522 1.234 1.526 1.235 1.522 1.234 1.522 1.235 1.525 1.235 1.522 1.235 1.522 1.235 1.526 1.234 1.523 1.236 1.521 1.234 1.525 1.236 1.523 1.234 1.522 1.234 1.526 1.235 1.522 1.236 1.522 1.234 1.525 1.234 1.523 1.235 1.521 1.234 1.525 1.236 1.524 1.236 1.522 1.235 1.526 1.236 1.524 1.234 1.521 1.235 1.522 1.234 1.523 1.234 1.522 1.234 1.526 1.235 1.522 1.234 1.522 1.235 R EPORT THIS IS FOR THE WHOLE GROUP. Submit your findings for Exercises 1 - 4. Use the following sections to create your detailed report. Report: Measurement Experiment with Micrometers 1. Objectives: The primary objective of this experiment was to measure the dimensions of three Mega Blok™ blocks, specifically their height and width, using both mechanical and digital micrometers. The experiment aimed to assess the precision and accuracy of the measurements taken with these instruments and investigate any variations that might arise from the different operators.
2. Equipment Used: We used the following equipment for this experiment: - Mechanical Micrometer - Digital Micrometer - Three Mega Blok™ blocks - Standard one-inch Micrometer for calibration 3. Environmental Concerns: The experiment was conducted in a controlled laboratory environment. The temperature and humidity levels were monitored and maintained within acceptable limits to minimize potential variations due to environmental factors. The environmental conditions were found to be suitable for the measurement process. 4. Procedure: 1. The micrometers were calibrated using a standard one-inch Micrometer before the experiment to ensure accurate measurements. 2. Three Mega Blok™ blocks were selected for measurement. 2. The measuring instruments were clean to prevent errors in the readings. 3. Each block's height and width were measured three times by each operator using both mechanical and digital micrometers. 4. Operators were instructed to follow a consistent measurement technique, including proper contact and reading procedures. 5. The measurements were recorded in the provided data sheets. 5. Data: The recorded data for the height and width measurements for all three blocks are presented in the provided tables. The readings are consistent with each operator taking three measurements per block using mechanical and digital micrometers. 6. Conclusion: The experiment revealed that the measurements taken using both mechanical and digital micrometers showed variations, similar to the previous gauge block experiment. These variations can be attributed to factors such as operator technique, instrument precision, and potential environmental influences. To minimize variations and enhance measurement accuracy, it is essential to maintain well- calibrated instruments, provide comprehensive training to operators, and establish standardized measurement procedures. Overall, this experiment highlights the importance
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of precision and consistency in measurements to ensure reliable data in various applications, including quality control and manufacturing processes.