Term
| 1. Describe the use of the following processes: LBD, LBW, and LBC. |
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Definition
-LBD uses a laser light to drill through hard materials such as synthetic diamonds, tungsten carbide cutting tools, glass, or ceramics.
-LBW uses a laser to weld materials too thin or too hard for other welding processes.
-LBC uses a laser to cut materials without overheating delicate parts that may be within a few thousandths of the cut. |
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Term
| 2. How is laser light formed? |
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Definition
| Laser light is produced as the atoms or molecules slow down from a higher energy state to a lower energy state. |
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Term
| 3. Other than lasing material, what is the difference between solid state lasers and gas lasers? |
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Definition
| Solid state lasers are most often low-power continuous or high-power pulse, and gas lasers can produce continuous high-power outputs. |
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Term
| 4. What effect does a materials surface have on the laser beam? |
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Definition
| All surfaces absorb and reflect light. The greater the reflection, the less effect the laser has on the material. |
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Term
| 6. What are reactive laser assist gases called? How do they work? |
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Definition
| They are called exothermic gases and they react to the metal like an oxyfuel cutting torch. |
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Term
| 7. What type of laser beam is used for drilling? Why? |
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Definition
| A pulsed laser, because the vapor produced by the laser blast would interfere with a continuous laser beam. |
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Term
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Definition
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Term
| 10. Why are some carbon arc electrodes copper-coated? |
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Definition
| To decrease electrode overheating and increase strength to reduce accidental breakage. |
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Term
| 11. What may occur if an SMA welding machine has below minimum arc voltage for air carbon arc gouging? |
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Definition
| Low arc voltages tend to sputter out making it hard to produce clean cuts. |
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Term
| 12. How can carbon arc welding be used to ensure 100% weld penetration? |
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Definition
| By back gouging the root of the weld. |
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Term
| 13. What is washing, and how can it be used? |
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Definition
| Washing can be used to remove large areas that contain defects, to reduce the transitional stresses of unequal-thickness plates, or to allow space for the capping of a surface with a wear-resistant material. |
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Term
| 14. How are oxygen lance cuts usually started? |
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Definition
| By using an oxyfuel torch to heat the lance tip to a red hot temperature. |
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Term
| 15. What unusual material can be cut with an oxygen lance? |
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Definition
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Term
| 16. What are the advantages of abrasive powder to the water jet cutting stream? |
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Definition
| Higher cutting speeds, harder materials, and improved kerfed surface finishes. |
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