Faculty of Engineering Mechanical Engineering Department. Basic Workshop Processes. Abdou Abdel- Samad Lecture No. (9) Turning. Outlines. Various Processes Cutting and Non-Cutting Processes Machining Operation with Machine Tools Care and Maintenance of Machine Tools
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Mechanical Engineering Department
Lecture No. (9)
This lecture aims:
to identify the most important parts of a lathe and their functions.
to identify standard and quick change tool holders mounted on a lathe carriage.
to explain the purpose of the rake and relief angles, and form tools.
to explain the uses and care of independent and universal chucks.
to explain the use of a face plate and face driver or drive center.
to describe different types of tapers and the methods used to produce and measure them.
to explain the correct uses of steadies and followers.
Radial Drilling Machine
Pillar Drilling Machine
Bench Drilling Machine
Safety 1Care and maintenance of machine tools
Economic manufacture means:
(a) Main spindle (b) Engagement lever
Taper roller bearing
(a) Tool steel or high speed steel
(b) Butt-welded high speed steel
(c) Welded high speed steel or brazed cemented carbide
(d) Diamond tip with holder
a. Diamond b. Support c. Holder d. Seal
) Clearance angle
) Wedge angle
) Rake angle
) Cutting angle
Checking of the clearance angle
Checking of the wedge angle
(a) Large plan angle (b) Small plan angle (c) Normal plan angle (45o)
) Plan angle
) Nose angle
R) Thrust against the axis of revolution
) Inclination angle
a) Straight finishing tool
b) Wide face square nose finishing tool
b) and c)
The following instructions have to be observed while grinding:
Stress on the cutting tool by the cutting force F
Tool Post VideoClamping of cutting tools
Four-way tool post
Tool Setting 2Setting of cutting tools
(a) Tool above center line
(b) Tool on center line
(c) Tool below center line
Influence of setting the tool above or below the center line on the clearance and rake angles.
The cutting tool must be clamped as short as possible.