3199369
Description
Flashcards by Vincent Bergeron, updated more than 1 year ago
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Created by Vincent Bergeron
over 8 years ago
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| Question | Answer |
| Name and describe the cutting action of five methods of cutting off material | 1.Hacksawing -saw cuts only on the forward stroke -reciprocating, mounted to floor 2. Bandsawing -endless, one way continuous in one direction; widely used 3. Abrasive cutting -cuts material with thin, abrasive wheel revolving at high speed, most metals and glass/ceramics, can be dry or with cutting fluid 4.Cold sawing -similar blade to wood cutting, but produces very accurate cuts and suitable for cutting aluminum, brass, copper, machine steel and stainless steel 5. Friction sawing -burning process by which a saw band is run at high speeds to burn or melt through metal - not good for solid metals but good for structural or honeycombed parts |
| What is the purpose of roller guide brackets? | -provide rigidity for a section of the blade and can be adjusted to accommodate various widths of material. -should be adjusted to just clear the width of the work being cut |
| How tight should the blade tension handle be adjusted? | -should be adjusted to prevent it from wandering or twisting --as tightly as possible with one hand |
| Of what material are saw blades made? | -high speed tungsten -high speed molybdenum steel |
| What pitch blade is recommended for: a. large sections? b. Thin sections? c. General-purpose sawing? | a. coarse 4-pitch blade b. 14 pitch blade c. 10 pitch blade |
| Why should two teeth of a saw blade be in contact with the work at all times? | If fewer than two teeth are in contact with the work , the work can be caught in the tooth space (gullet) which will cause the teeth of the blade to strip or break. |
| In what direction should the teeth of a saw blade point? | toward the motor end of the machine |
| How should the workpiece be set for sawing partially cut work with a new saw blade? | Rotate the work one-half turn in the vise to prevent the new blade from jamming in the cut |
| What may happen if too fast a blade speed is used? | -Saw teeth will dull quickly and cause inaccurate cuts |
| How can a vise be checked for squareness? | -with a square to make it is at right angles to the saw blade |
| How should the roller guide brackets be set for cutting work? | -until they just clear both sides of the material to be cut |
| Explain how thin work should be held in a vise. | -Hold the material flat in the vise to prevent the saw teeth from stripping -also can be placed between two pieces pf wood or soft material |
| What precaution should be used for holding short work in a vise? | -place a short piece pf the same thickness in the opposite end of the vise, to prevent vise from twisting when tightened |
| Abrasive cutting saw -cuts material with thin, abrasive wheel revolving at high speed, most metals and glass/ceramics, can be dry or with cutting fluid | |
| Friction sawing -burning process by which a saw band is run at high speeds to burn or melt through metal - not good for solid metals but good for structural or honeycombed parts | |
| Bandsawing -endless, one way continuous in one direction; widely used | |
| Cold sawing -similar blade to wood cutting, but produces very accurate cuts and suitable for cutting aluminum, brass, copper, machine steel and stainless steel |
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