TPC 328 Flashcards
What saw should you use for round stock?
Always use a power hacksaw or a horizontal handsaw for a round stock, and Always clamp the round stock in a vise
What is the main difference between the operation of a power hacksaw and a horizontal bandsaw?
In a horizontal bandsaw there is no cutting stroke and, therefore, no lost motion
When installing bandsaw blades which way must the teeth face?
The teeth must point downward and to the right
When setting up the horizontal bandsaw how is band speed controlled?
Band speed is controlled on most light-duty bandsaws by changing the drive belt position
When making the cut what is the last step?
Move the head control lever to release
When selecting one piece guide inserts what must you do?
You must select a pair of upper and lower inserts to match the width and thickness of the band you are using
When setting the blade the teeth in your right hand should?
Point downward
What is one bandsaw safety precaution?
Make sure all guards are in place before using the bandsaw
As you approach the end of the cut on a bandsaw what should you do?
Reduce the feed pressure so that the saw does not break through the work unexpectedly
When setting up the vertical bandsaw for internal cutting what is one step?
Sanding the portions of the band ends in contact with the welder jaws so they are free of dirt, oil, or similar contaminants
When using the sensitive drill press the feed is under the control of the?
Directly Under the control of the operator
Before mounting a tapered-shank machining tool, make sure to what?
Make sure the male and female surfaces of the drill shank and the spindle are free of chips, burrs, and nicks
What drilling machine also has the power and rigidity for boring, an operation normally not preformed on a drilling machine?
Radial presses
When you plan the order of the machining steps what is one crucial step?
Choose the order that requires the fewest changes in setup
How do you set up a workpiece in a clean drill-press vise using parallels?
Lightly tap the upper surface of the workpiece with a lead or plastic faced hammer to seat the work piece firmly on the parallels
When should you use a gear-head drill press?
You should try to use a gear-head drill press on all middle-sized holes ( 3/8 to 1/2in. ) and always use it on holes over 1/2in
Rpm spindle speed formula
( rpm = sfpm X 4
—————
Tool diameter )
Because you have a large-diameter drill and fairly thick stock to drill through what must you do?
You must periodically back the drill out of the hole to clear away loose chips. This procedure cuts down the chances of packing the chips, which could break the drill
If the drills cutting edge chips what is the usual issue?
The feed is too fast
The size of the counterbore pilot ( usually an interchangeable component ) depends on?
The diameter of the existing hole
The most distinctive feature of typical precision vise?
Having a swivel base
A shaper should never be left with a cutting tool in its?
Tool post
What is part of the pre-startup checklist?
Set the transmission on the slowest speed
What is “indicating in” mean?
A leveling process, you indicate-in either the work table or the vise before using the shaper
Why do you tap the work lightly with a soft mallet when mounting a workpiece?
To obtain a solid seat and fit
What is the first step of positioning the ram, table, and tool holder?
Setting the proper length of stroke
Number of strokes per minute formula
( N = CS x 7
————
L + 1 )
What is L + 1 mean?
Length of the workpiece through which the cutter must actually travel ( in inches ) plus 1 in. more for the total over travel made by the ram at both ends of its stroke
When making the cut, what must you wear?
Wear proper eye protection
What can a shaper be used to produce?
Splines, keyways, and slots and to machine internal and vertical surfaces
With a surface grinder what kind of surfaces can you produce?
Depending on the particular setup, you can produce flat, angular, or contoured surfaces in this machine
What is part of preparation for grinding your workpiece?
Make sure it has enough surplus material for grinding
How should you set the diamond dresser?
Set the dresser so that the arrow points in the proper direction. Position the grinder saddle and lower the wheel until it’s high point lightly touches the diamond
What is the first operation on the V-block?
To grind the basic flat surface
When grinding a flat surface where should you position the wheel?
Slightly beyond the back edge of the work piece. Start the automatic table feed. Lower the wheel .001 to .002 for a rough cut and turn on the coolant
The recommended allowance for finishing cuts in general purpose grinding is?
.0005 to .001
What is the formula to find rpm in cylindrical grinding machines?
Rpm = sfpm/ wheel circumference
When grinding position the workpiece between centers, near the center of the table and provide enough pressure…
From the foot-stock center adjustment to hold the work in place
For general purpose grinding, you can calculate the approximate rpm you need for the workpiece by using the equation?
Rpm = sfpm X 4/workpiece diameter
When the width of the wheel is greater than the length of the area to be ground what do you do?
The table traverse is not used, you rough and finish grind by in feeding ( plunge grinding )
What optional accessory provides greater flexibility for moving the workpiece to various positions?
Rotary table
When are stub boring bars used?
When the workpiece area to be bored can be located close to the head stock of the machine, there is less chance of vibration and tool chatter
When working a small bore with a light boring bar, you need a?
Cutter with greater back-take and side-rams angles than required by a larger tool taking heavier cuts
When measuring on finished surfaces with a dial indicator what do you adjust it to?
Adjust the workpiece until the reading is constant throughout the table stroke
If the workpiece has a machined hole, you can use it’s inside wall as a reference surface for alignment called?
Checking concentricity
Both the primary and the secondary layout lines must be?
Parallel with the axis of the boring bar
If the boring bar is inserted in an end support you cannot withdraw the bar from the work to make the measurement, however you can…
Still use inside calipers to measure the bore size
Multiple-point boring is particularly advantageous in?
The machining of long work areas to obtain a rough or semi-finished bored hole
When facing the tool is fed radially by a small, power cross-slide within….
The tool holder itself
