Mechanical Engineer Tensile Tests and Orthographic Computer-Aided Drawings. 1. Tasks. Task 1

Transcription

1 Mechanical Engineer Tensile Tests and Orthographic Computer-Aided Drawings Mechanical engineers research, design and develop machinery and systems for heating, ventilating and air conditioning, power generation, transportation, processing and manufacturing. They also perform duties related to the evaluation, installation, operation and maintenance of mechanical systems. Mechanical engineers are employed by consulting firms, by power-generating utilities and in a wide range of manufacturing, processing and transportation industries or they may be self-employed. To learn more about this occupation, click here. NOC 2132 Mechanical engineer Catalogue Tensile Tests Orthographic Computer- Aided Drawings Essential Skills Focus Document Use Data Analysis Essential Skills - Ontario Curriculum Linkages 1. Tasks Mechanical engineers use reference materials like catalogues to design products or machinery and to order materials. Task 1 A Mechanical engineer is required to determine the correct stock number of a socket head cap screw for the design of a machine. The socket head cap screw has a diameter of ¼ and it has 20 threads per inch. The length of a socket head cap screw is 2 ¾. Look at the catalogue page and find the stock number. Document Use 1

2 Mechanical engineers must understand destructive testing to evaluate material properties and to ensure that correct materials are used. Mechanical engineers evaluate materials based on the results of destructive testing by looking at tensile test reports. Task 2 Look at Tensile Test #1 Report. What is the plate thickness of the specimen tested in Tensile Test #1? Document Use Task 3 Look at Tensile Test #2 Report. What is the plate thickness of the specimen used in Tensile Test #2? Document Use Elongation is the ability of a material to stretch to its maximum potential prior to breaking. In a test report the higher the percentage of elongation the more the material stretches. Task 4 Look at Tensile Test #1 Report and Tensile Test #2 Report. Which specimen sample stretches more? Data Analysis 2

3 Mechanical engineers are required to create and obtain information from Orthographic Computer-Aided Drawings. Task 5 Look at the Orthographic Computer-Aided drawing for the Post Mount Plate. Length is defined as the longest dimension of a part. What is the length of this plate? Document Use Task 6 Look at the Orthographic Computer-Aided drawing for the Infeed Mount Angle 2. What type of steel is used for this bracket? Document Use Task 7 Look at the Orthographic Computer-Aided drawing for Infeed Mount Angle 2. What unit of measurement is used for all dimensions? Document Use 3

4 NOC 2132 Mechanical engineer Catalogue 4

5 NOC 2132 Mechanical engineer Tensile Test #1 Report 5

6 NOC 2132 Mechanical engineer Tensile Test #2 Report 6

7 NOC 2132 Mechanical engineer Orthographic Computer- Aided Drawing for Post Mount Plate Orthographic Computer-Aided Drawing for Post Mount Plate THE PROFILE OF THIS PART IS TO BE CUT BY CNC ROUTER. SOME DIMENSIONS MAY BE OMITTED FOR CLARITY. D D C R10 TYP C X 11 WIDE SLOT THRU 4X 6.8 THRU ALL B A The information contained in this drawing is the sole property of ddsamdi. Any reproduction in part or whole without written permission from ddsamdi is prohibited. NTED: 23-Jul-09, 3:58 PM DESCRIPTION dds -DO NOT SCALE FROM DRAWING -BREAK ALL AUTOMATED MACHINERY DESIGN INC. SHARP EDGES THIRD ANGLE ALL DIMENSIONS IN mm PROJECTION UNLESS OTHERWISE SPECIFIED X 0.5mm X.X 0.1mm X.XX 0.02mm ANG TOL 1.0 MAT'L: ALUMINUM, 6061-T6 - PLATE MAT'L SIZE: THK FINISH: NONE DRAWN BY: DES on 08 June, :19:40 PM CHECKED BY: MASS: (kg) SCALE: 1:2 SIZE: A SHEET: 1 of 1 NAME: DDS - POST MOUNT PLATE dds #: JOB # MACHINE # QTY: REV: REV. BY: DATE: B A 7

8 NOC 2132 Mechanical engineer Orthographic Computer- Aided Drawing for Infeed Mount Angle 2 Orthographic Computer-Aided Drawing for Infeed Mount Angle D D C C 2X 11.0 SLOT THRU R X 45 2 PLCS B SLOT THRU REV. DESCRIPTION dds AUTOMATED MACHINERY DESIGN INC. MAT'L SIZE: 3x3x3/8 DATE: -DO NOT SCALE FROM DRAWING -BREAK ALL SHARP EDGES THIRD ANGLE ALL DIMENSIONS IN mm PROJECTION UNLESS OTHERWISE SPECIFIED X 0.5mm X.X 0.1mm X.XX 0.02mm ANG TOL 1.0 MAT'L: Steel, Structural - 44W Angle BY: B FINISH: ZINC DICHROMATE A The information contained in this drawing is the sole property of ddsamdi. Any reproduction in part or whole without written permission from ddsamdi is prohibited. JOB # MACHINE # DRAWN BY: IH on 13 February, :44:16 PM CHECKED BY: MASS: SCALE: 1:2 SIZE: A SHEET: 1 of 1 NAME: DDS - B200 INFEED MOUNT ANGLE 2 (kg) dds #: REV: 0 QTY: A NTED: 23-Jul-09, 3:30 PM 8

9 2. Answer Key Essential Skills Focus Task 1 Answer A Mechanical engineer is required to determine the correct stock number of a socket head cap screw for the design of a machine. The socket head cap screw has a diameter of ¼ and it has 20 threads per inch. The length of a socket head cap screw is 2 ¾. Look at the catalogue page and find the stock number. FISTE Check page 11 for one way to get this answer. Task 2 Answer Look at Tensile Test #1 Report. What is the plate thickness of the specimen tested in Tensile Test #1? 75 mm Check page 12 for one way to get this answer. Task 3 Answer Look at Tensile Test #2 Report. What is the plate thickness of the specimen used in Tensile Test #2? 60 mm Check page 13 for one way to get this answer. 9

10 Task 4 Look at Tensile Test Report #1 and Tensile Test Report #2. Which specimen sample stretches more? Essential Skills Focus Answer Sample #1 Check page 14 for one way to get this answer. Data Analysis 1 Task 5 Look at the Orthographic Computer-Aided drawing for the Post Mount Plate. Length is defined as the longest dimension of a part. What is the length of this plate? Answer 190 Document Use 3 Check page 15 for one way to get this answer. Task 6 Answer Look at the Orthographic Computer-Aided drawing for the Infeed Mount Angle 2. What type of steel is used for this bracket? Structural - 44W angle Check page 16 for one way to get this answer. Task 7 Answer Look at the Orthographic Computer-Aided drawing for Infeed Mount Angle 2. What unit of measurement is used for all dimensions? millimeter (mm) Check page 17 for one way to get this answer. 10

11 3. Answer Steps Task 1 Answer A Mechanical engineer is required to determine the correct stock number of a socket head cap screw for the design of a machine. The socket head cap screw has a diameter of ¼ and it has 20 threads per inch. The length of a socket head cap screw is 2 ¾. Look at the catalogue page and find the stock number. FISTE One way to get this answer Scan the page and headings for key word ¼ The diameter is the first dimension listed in white lettering at the top of a list followed by the threads per inch. 2. Locate the list heading ¼ Locate the subheading Length. 4. Scan down the column to locate 2 ¾ length. 5. Decide that the correct Stock Number is FISTE Skill Focus 11

12 Task 2 Answer Look at Tensile Test #1 Report. What is the plate thickness of the specimen tested in Tensile Test #1? 75 mm One way to get this answer Scan the Tensile Test #1 Report for key words specimen and plate thickness. 2. Locate Sample #1 beside Specimen. 3. Understand that 75 mm thick plate refers to plate thickness. 4. Decide that Sample #1 has a plate thickness of 75 mm. Skill Focus 12

13 Task 3 Answer Look at Tensile Test #2 Report. What is the plate thickness of the specimen used in Tensile Test #2? 60 mm One way to get this answer Scan the Tensile Test #2 Report for key words specimen and plate thickness. 2. Locate Sample #2 beside Specimen. 3. Understand that 60 mm thick plate refers to plate thickness. 4. Decide that Sample #2 has a plate thickness of 75 mm. Skill Focus 13

14 Task 4 Look at Tensile Test #1 Report and Tensile Test #2 Report. Which specimen sample stretches more? Answer Sample #1 One way to get this answer Scan Tensile Test #1 Report and Tensile Test #2 Report using key word Elongation. 2. Locate 28% on Tensile Test #1 beside Elongation. 3. Locate 23% on Tensile Test #2 beside Elongation. 4. Decide that 28% is the higher percentage of elongation. 5. Decide that Sample #1 stretches more. Skill Focus Data Analysis 1 Additional Skills: 14

15 Task 5 Look at the Orthographic Computer-Aided drawing for the Post Mount Plate. Length is defined as the longest dimension of a part. What is the length of this plate? Answer 190 One way to get this answer Scan the drawing to locate the length of the part. 2. Decide that the length is displayed from left to right on the drawing. 3. Locate the 0 on the drawing as the first reference. 4. Scan the drawing from left to right to find the reference point for the point on the plate that is furthest from the reference point. 5. Locate the 190 on the drawing as the second reference. 6. Decide that the length is 190. Skill Focus Document Use 3 15

16 Task 6 Answer Look at the Orthographic Computer-Aided drawing for the Infeed Mount Angle 2. What type of steel is used for this bracket? Structural - 44W angle One way to get this answer Scan the drawing using the key word Steel. 2. Locate the word Steel in the legend on bottom right of the drawing. 3. Read the information surrounding Steel. 4. Locate structural 44W angle beside the word Steel. 5. Decide that the type of steel used is structural - 44W angle. Skill Focus 16

17 Task 7 Look at the Orthographic Computer-Aided drawing for Infeed Mount Angle 2. What unit of measurement is used for all dimensions? Answer millimeter (mm) One way to get this answer Scan the drawing using key words measurement and dimensions. 2. Locate the description ALL DIMENSIONS IN mm UNLESS OTHERWISE SPECIFIED. 3. Understand that mm means millimeters. 4. Decide that the unit of measurement used is millimetres. Skill Focus 17

18 Essential Skills - Ontario Curriculum Linkages: Mechanical engineer The course and curriculum expectations linked to each Essential Skills task are shown below. Students who meet the curriculum expectations below will also have demonstrated the Essential Skills at the level indicated. If students do not meet the curriculum expectations below, teachers can prepare students by scaffolding learning. Course(s) Manufacturing Engineering Technology, Grade 11, University/ (TMJ3M) Manufacturing Technology, Grade 12, (TMJ4C) Technological Design, Grade 12, University/ (TDJ4M) English, Grade 11, (ENG3C) Curriculum Expectations A4.2 apply scientific concepts to manufacturing-related processes (e.g., material selection, material processing, setting of machining speed and cutting force); B1.3 use appropriate resources and reference materials (e.g., charts, tables, material- and product-related specifications, schematics) when planning a project; A2.1 identify and locate sources of technical data and related information for a design project (e.g., trade literature, catalogues, applicable codes, municipal and provincial laws and regulations, workshops, seminars), using a variety of techniques and tools; Reading and Literature Studies 1.2 select and use appropriate reading comprehension strategies before, during, and after reading to understand texts, including increasingly complex texts (e.g., preview vocabulary to become familiar with new words; use a graphic organizer to illustrate the organizational pattern of a text, such as problem/solution, comparison/ contrast, cause and effect, and order of importance; sketch while reading to help visualize the information described in the text). Essential Skills Tasks Task 1 A Mechanical engineer is required to determine the correct stock number of a socket head cap screw for the design of a machine. The socket head cap screw has a diameter of ¼ and it has 20 threads per inch. The length of a socket head cap screw is 2 ¾. Look at the catalogue page and find the stock number. 18

19 Essential Skills - Ontario Curriculum Linkages: Mechanical engineer Course(s) Manufacturing Engineering Technology, Grade 11, University/ (TMJ3M) Manufacturing Technology, Grade 11, (TMJ3C) Manufacturing Engineering Technology, Grade 12, University/ (TMJ4M) English, Grade 11, (ENG3C) Curriculum Expectations B2.1 demonstrate an understanding of destructive and non-destructive tests to evaluate material properties (e.g., file test, spark test, moisture content test, dye testing, hardness testing); B2.2 evaluate material properties (e.g., heat resistance, mass, strength) as they relate to specific project needs; B2.3 research and evaluate the properties of various ferrous and non-ferrous materials before selecting the most appropriate material for a project; B2.2 select appropriate materials for a project based on their properties and characteristics (e.g., physical, mechanical, thermal, chemical, electrical, magnetic, optical, acoustical) and the project s design criteria (e.g., strength, finish, customer specifications, quality control processes, working environment). B1.6 select suitable materials for fabricating products based on the design specifications and the intended use of the products. Reading and Literature Studies 1.2 select and use appropriate reading comprehension strategies before, during, and after reading to understand texts, including increasingly complex texts (e.g., preview vocabulary to become familiar with new words; use a graphic organizer to illustrate the organizational pattern of a text, such as problem/solution, comparison/ contrast, cause and effect, and order of importance; sketch while reading to help visualize the information described in the text). Essential Skills Tasks Task 2 Look at Tensile Test #1 Report. What is the plate thickness of the specimen tested in Tensile Test #1? Task 3 Look at Tensile Test #2 Report. What is the plate thickness of the specimen used in Tensile Test #2? Task 4 Look at Tensile Test #! Report and Tensile Test #2 Report. Which specimen sample stretches more? Data Analysis 1 19

20 Essential Skills - Ontario Curriculum Linkages: Mechanical engineer Course(s) Manufacturing Engineering Technology, Grade 11, University/ (TMJ3M) Manufacturing Technology, Grade 12, (TMJ4M) Manufacturing Technology, Grade 12, (TMJ4C) Technological Design, Grade 11, University/ (TDJ3M) Technological Design, Grade 12, University/ (TDJ4M) Curriculum Expectations A1.2 use technical drawings (e.g., orthographic, pictorial, isometric, assembly) as part of the design process to develop solutions to challenges or problems in manufacturing technology; B1.5 generate product specifications through the accurate interpretation of engineering drawings, sketches, and reports; A1.4 use technical drawings (e.g., orthographic, pictorial, assembly drawings and sketches) as part of the design process to develop solutions to challenges or problems in manufacturing technology; B1.2 interpret and create drawings or sketches (e.g., orthographic projection, assembly, sectional, detail, pictorial) that include specifications and information, such as symbols and legends, appropriate to the project; A3.3 accurately interpret technical drawings and specifications. A3.3 accurately interpret technical references, drawings, test data, and specifications. Essential Skills Tasks Task 5 Look at the Orthographic Computer-Aided drawing for the Post Mount Plate. Length is defined as the longest dimension of a part. What is the length of this plate? Document Use 3 Task 6 Look at the Orthographic Computer-Aided drawing for the Infeed Mount Angle 2. What type of steel is used for this bracket? Task 7 Look at the Orthographic Computer-Aided drawing for Infeed Mount Angle 2. What unit of measurement is used for all dimensions? 20

21 Essential Skills - Ontario Curriculum Linkages: Mechanical engineer Course(s) English, Grade 11, (ENG3C) Principles of Mathematics, Grade 9, Academic (MPM1D) Curriculum Expectations Reading and Literature Studies 1.3 identify the most important ideas and supporting details in texts, including increasingly complex texts (e.g., describe to a peer the main events in a novel; explain how a scatter graph in a math textbook illustrates the main idea in the accompanying text; compare two newspaper articles on the same current event, listing the main ideas in each and the details provided to support them). Measurement and Geometry - determine, through investigation, the optimal values of various measurements; - solve problems involving the measurements of two-dimensional shapes and the surface areas and volumes of three-dimensional figures; Essential Skills Tasks 21