Section 7: Layout
Instructor Guide
Basic Drilling and Riveting
Basic Drilling and Riveting Introduction:
Copyright © 2012 Boeing. All rights reserved.
Layout Section Time: .5 hours Section Objectives: Using formulas and instruction in proper taping and marking techniques, students will accurately perform layout according to drawings and specifications.
Layouts When doing layouts, especially on the skin, always use layout tape! o
When taping off an area to work, always tape the entire structure if possible, or at the minimum, one-half inch beyond the area in which you are working.
Markers o
Always use approved markers per process specification.
o
They must also be approved by your shop management and be available from your tool room.
Note: Never use an ordinary pencil on titanium or aluminum. Pencil lead (graphite) is not compatible with titanium or aluminum and will eventually cause structural failure.
Copyright © 2012 Boeing. All rights reserved.
Basic Drilling and Riveting Introduction Layout (continued) Formula to calculate even spacing The number of spaces divided by the length of the part from the first to the last fastener. Example: You have a stringer that is 20 inches long and the drawing calls out for a .50 edge margin and 18 fasteners evenly spaced. Step 1. Subtract 1 inch from the overall part (.5 E.M. + .5 E.M.): 20" - 1" = 19" Step 2 Subtract the first fastener, because only the spaces are counted: 18 - 1 = 17 Step 3 Divide the distance between the first and the last fastener by the number of spaces needed: 19" by 17 spaces = 1.117
Note: The number of spaces will always be one less than the number of fasteners.
Practice Review 1 Students will practice using the formula to lay out Project. Instructor will inspect/assist.
Practice Review 2 Do the layout for the training project, meeting the drawing tolerances while using proper materials per instructions.
Copyright © 2012 Boeing. All rights reserved.
Basic Drilling and Riveting Introduction
Hand out: Drawing for Module Hand Out: Installation Plan for project Read entire Grading Sheet for Module 3 Ask if there are any questions. This project is designed to check the students’ drawing and work order interpretation abilities, as well as their drilling, countersinking, and riveting skills. Demonstrate especially difficult operations as necessary. Note: Instructors should watch for common mistakes. During question and answer periods, discuss these mistakes as a group. Practice Review: Students will perform layout, drill holes, countersink, and rivet on two plates per the drawing and IP. Students must be able to interpret the drawing and the specs, and must perform the mechanical operations in order to complete the project.
The allotted time to complete this project is 7.5 hours.
Copyright © 2012 Boeing. All rights reserved.
Basic Drilling and Riveting
Basic Drilling and Riveting Introduction:
Copyright © 2012 Boeing. All rights reserved.
Layout Section Time: .5 hours Section Objectives: Using formulas and instruction in proper taping and marking techniques, students will accurately perform layout according to drawings and specifications.
Layouts When doing layouts, especially on the skin, always use layout tape! o
When taping off an area to work, always tape the entire structure if possible, or at the minimum, one-half inch beyond the area in which you are working.
Markers o
Always use approved markers per process specification.
o
They must also be approved by your shop management and be available from your tool room.
Note: Never use an ordinary pencil on titanium or aluminum. Pencil lead (graphite) is not compatible with titanium or aluminum and will eventually cause structural failure.
Copyright © 2012 Boeing. All rights reserved.
Basic Drilling and Riveting Introduction Layout (continued) Formula to calculate even spacing The number of spaces divided by the length of the part from the first to the last fastener. Example: You have a stringer that is 20 inches long and the drawing calls out for a .50 edge margin and 18 fasteners evenly spaced. Step 1. Subtract 1 inch from the overall part (.5 E.M. + .5 E.M.): 20" - 1" = 19" Step 2 Subtract the first fastener, because only the spaces are counted: 18 - 1 = 17 Step 3 Divide the distance between the first and the last fastener by the number of spaces needed: 19" by 17 spaces = 1.117
Note: The number of spaces will always be one less than the number of fasteners.
Practice Review 1 Students will practice using the formula to lay out Project. Instructor will inspect/assist.
Practice Review 2 Do the layout for the training project, meeting the drawing tolerances while using proper materials per instructions.
Copyright © 2012 Boeing. All rights reserved.
Basic Drilling and Riveting Introduction
Hand out: Drawing for Module Hand Out: Installation Plan for project Read entire Grading Sheet for Module 3 Ask if there are any questions. This project is designed to check the students’ drawing and work order interpretation abilities, as well as their drilling, countersinking, and riveting skills. Demonstrate especially difficult operations as necessary. Note: Instructors should watch for common mistakes. During question and answer periods, discuss these mistakes as a group. Practice Review: Students will perform layout, drill holes, countersink, and rivet on two plates per the drawing and IP. Students must be able to interpret the drawing and the specs, and must perform the mechanical operations in order to complete the project.
The allotted time to complete this project is 7.5 hours.
Copyright © 2012 Boeing. All rights reserved.
