Task 7. Match the beginnings of the sentences with their endings.
Date: 2015-10-07; view: 440.
Task 6. Put these words into the right word order to make a sentence.
1. entire length / the width of the / ideal conditions / surprisingly / along its / quite frequently / occur / flank wear land / Under /will be very uniform / which .
2. are encountered / the heated metal / also contributes to / Oxidation of / tool wear, / and high cutting temperatures / particularly when / near the cutting edge / fast cutting speeds.
| beginning | ending | ||
| Breakage of the cutting edge caused by overloading, heavy shock loads, or improper tool design... | a | ... at cutting speeds where a good surface finish will result. | |
| However, if the rate of crater growth is rapid, ... | b | ... is enlarged at the nose of the tool. | |
| Cemented carbide tools can operate successfully at higher cutting speeds, where the built-up edge ... | c | ... increase the cutting speed. | |
| Whenever possible, cemented carbide tools should be operated ... | d | ... of the wear land may become somewhat slanted. | |
| The best measure of tool wear ... | e | ... quite large in relation to the subsequent total amount. | |
| When the depth of cut is uneven the bottom edge ... | f | ... is flank wear. | |
| When a sharp tool is first used, the initial amount of flank wear is ... | g | ... leading to a short tool life, corrective measures must be taken. | |
| Under normal operating conditions, the width of the flank wear land will increase at a uniform rate ... | h | ... is not normal wear and should be corrected. | |
| The most effective way to eliminate the built-up edge is to ... | i | ... until it reaches a critical size after which the cutting edge breaks down completely. | |
| Often the size of the wear land ... | j | ... does not occur and where a good surface finish is obtained. |
Task 8 . Fill in the gaps using the words from the box:
| <== previous lecture | | | next lecture ==> |
| TOOL WEAR | | | Material, disadvantage, lubricated, reduces, expensive, water, provided, creating, diamond, stones, exposed, polishes, softer, easier, than, sharpening |