This document discusses the design of jigs, fixtures, and tools. It defines jigs, fixtures, and tool design. It describes different types of milling fixtures and materials used for jigs and fixtures. It provides examples to calculate cost savings from using different tools over various production runs. These examples calculate savings from using a second tool that costs less per part, from using a fixture compared to an alternative method, and from using a fixture versus milling without one. The document instructs to analyze a part drawing and production plan to design a channel or box jig, including preparing design sketches and including all necessary data in a tool drawing.
1. EMM 513 JIG, FIXTURE AND TOOL DESIGN
1. Describe the following terms
a. Jig
b. Fixture
c. Too design
2. With help of sketches, describe the various types of milling fixtures
3. Discuss the different types of materials used for making jigs and fixtures
4. A part requiring 6 holes is to be drilled using a jig. The first tool can produce the parts for
Ksh 190 each, the second for Ksh 120 each. What will be the savings over the production
run of 1000 parts if the second tool is used?
5. A lathe fixture costs Ksh 15000 to build and produces parts at a cost of Ksh 20. How
many parts must it produce to pay for itself when compared to alternative method that
requires no special tooling and is capable of making the parts at a cost of Ksh 40 each?
6. A flange-plate adapter costs Ksh 24 per part to mill without a fixture and Ksh 10 per part
when a fixture is used. Assuming the fixture costs Ksh 12800, how much will the fixture
save over a production run of 1500 parts?
7. Analyze the part drawing and production plan, as shown in the figure below, to determine
all relevant information necessary to design a channel or box jig
a. Prepare design sketches to calculate sizes and dimensions
REFER TO JIG AND FIXTURE DESIGN Pages 1 - 50 - Text Version _ FlipHTML5 TEXT
BOOK Pgs 228-232
2. EMM 513 JIG, FIXTURE AND TOOL DESIGN
b. Include all necessary data in the completed tool drawing
NOTES
1. Revise Extensively for the exam
2. Questions 2, 6 and 7 are to be submitted as assignment, CAT 1 AND CAT 2
RESPECTIVELY after the Exam.
