Machining Lab

Machining Process Design and Analysis

Surface Roughness Lab

Prerequisite Reading: Kalpakjian, Chapters 21, Machining Science Lecture Notes

Preliminary lab report due at the beginning of lab

EXCEL data file must be emailed to your instructor within 4 hours after the completion of

the lab.

EXCEL analysis file must be emailed to your instructor prior to the beginning of your lab

period the following week

Analysis report must be submitted to your instructor at the beginning of your lab period

the following week

Names: __________________________

__________________________

__________________________

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PRELIMINARY REPORT (include this sheet with your answers)

Provide answers to the following questions.

1. What are the six factors that influence the topography of a machined surface?

2. What is the difference between a stable machining process and an unstable machining

process?

3. Built up edge formation is typically associated with what machining conditions?

4. Assuming that a straight turning process is carried out with a cutting tool with a 1/32 in.

nose radius and at a feed rate of .008 in/rev, what is the theoretical height of the scallops

that are left behind?

5. What device will be used to measure surface roughness of the turned surfaces in this

laboratory?

6. What radial depth of cut will be used for each turning process experiment?

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IE 306 Machining Process Design and Analysis

Surface Roughness Lab

1. LAB SUMMARY

The purpose of this lab is for you to:

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become familiar with the use of a manual engine lathe for straight turning a cylindrical

surface

become familiar with the use of the PocketSurf profiliometer for measuring the surface

roughness of a cylindrical surface

understand the factors that affect the measureable surface roughness of a machined

surface

2. BACKGROUND

The finishing pass of a machining process is used to generate a surface that is...