TPC 326 Flashcards
A universal horizontal milling machine is like a plain horizontal milling machine except?
It has a table swivel
What houses the spindle in a milling machine?
The column
What supports the saddle and table on a milling machine?
The Knee
How is the vertical milling attachment mounted?
It is bolted to the column for support
A system of gears in the vertical milling attachment changes the spindle rotation from?
Horizontal to vertical
Spindle speed is always expressed in?
RPM
A milling cutter’s speed is the rate at which?
A particular cutter tooth passes over the workpiece surface
In order to compute spindle speed, you must have?
Cutter speed
Cutter diameter
Conversion from ft to in
An effective method for holding a cylindrical workpiece, besides using a chuck, is to?
Mount it in a V-block
The angular graduations on the base of the vise allow you to?
Align the workpiece accurately at any angle to the overhead cutter
A slab milling cutter is a type of plain milling cutter that is especially designed for taking ________ cuts
Heavy
If the helix spiral to the right across the face of the cutter what kind of hand is it?
It is a right hand helix
If the work is fed from the left to the right what kind of cut are you making?
A left hand cut
The style B arbor has a _____________ which fits into the bearing in the arbor support.
Keyed bearing sleeve
Check the ____________ for proper positioning. Carefully move the arbor taper into the spindle.
Drawbar
Why should the arbor nut never be tightened or loosened unless the arbor support is in position?
The arbor can be sprung if it is not supported
Computing spindle speed in rpm formula?
rpm= sfpm x 4
————
D
In rough milling the workpiece what crucial for the most efficient cut?
Balance speeds, feeds, and the depth of cut
If you stop the automatic feed before the cut is finished what should you do?
Do not leave the cutter turning, it could leave grooves in the workpiece
How can you increase the surface quality?
Lower the feed rate while maintaining the same spindle speed
The first step in machining the T- slot is?
You must mill a slot
To mill the first slot in the T slot you will need what kind of cutter?
Side milling cutter
Aligning the cutter and workpiece
You can calculate this distance by subtracting one-half of the cutter width from the distance between the slots centerline and the edge of the workpiece
The T slot is completed by using a T slot milling cutter fitted into the spindle of the milling machine with a?
Spindle adapter
Since the T slot cutter is held in the horizontal spindle instead of on an arbor it is necessary to set the workpiece up on its?
Side to complete the T slot
Angle milling a bevel on a workpiece you should use?
A 45 degree single angle cutter
Use end mills for?
Vertical milling of slots
Milling the T slots with a vertical milling attachment
Use the same T slot cutter that you used in the horizontal setup
What milling cutter do you use when angular milling with a vertical milling attachment
Use an end mill in the vertical attachment to mill the bevel on the workpiece
The procedure for milling a dovetail are very similar to the procedures for milling a T-slot the difference is?
You mill angular dovetails in the wall of the slot or groove instead of a T
In straddle milling what controls the distance between the cutters?
Spacers
As a cut is made in saddle milling the workpiece passes between the cutters, be sure there is clearance between?
The top surface of the workpiece and the spacers between the cutters
What is the greatest advantage of straddle milling?
You save time
What helps to balance the thrust load on the arbor?
The opposite helix angles when both are cutting
The cutter used to mill the angled step must be wide enough to?
Finish the wide end of the step
The most precise method of finding how wide the end of an angled step measures is?
To use trigonometry
Why is it best practice to use the smallest cutter that will do the job?
It’s less expensive
The amount of cross feed necessary to remove a given amount from the angled side of the workpiece is?
Actually less than the given amount
In vertical face milling the shell end mill must be wider than the surface you must cut, why?
This avoids surface lines
If you were to use a side milling cutter mounted on the horizontal arbor of the machine, you would produce?
A key seat with feathered ends
Milling machine cutters for woodruff key seats and keyways are?
Standardized
The last two digits in a woodruff key indicate?
The cutter diameter in eighths of an inch
What kind of arbor is used in shell end mill mounting setup?
Style C arbor
The two-fluted end mill has cutting edges on its sides and across the end, this allows for?
Plunging
The two fluted end mill acts like a?
Drill bit
When a dividing head is not used, it is best to use what on round work?
Straddle mill square ends on round work
To determine the largest square that you can cut out of any shaft, multiply the diameter by?
.707
What can you use if the straddle distance is slightly to narrow to the workpiece?
Install shims
When milling tangs what procedure do you use?
The same general procedures for milling a square
If a single flat surface is specified on the circumference of a cylindrical workpiece l, it is usually machined with a?
Plain milling cutter
