Term
| Ultrasonic Machining(Erosion Process) |
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Definition
| Tool vibrates without hitting the workpeice, causing a resonance. Slurry is thrown against the workpiece creating a chemical reaction which erodes the workpiece. |
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Term
| Ultrasonic Machining(Abrasive Process) |
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Definition
| The tool hits the workpiece directly. The vibrations creation the cut. No thermal or electrical components involve |
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Term
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Definition
-Little heat is generated
-Physical/chemical properties are not altered
-No cracking of parts and no thermal stress
-Intricate delicate parts can be machined
(SF depending on work material and abrasive particles used, amplitude of tool and SF of tool) |
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Term
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Definition
-Slow process
-Slow removal rates (1-2 squared inches per hour)
-Taper in holes
-Overcut depending on size particles used |
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Term
| ABRASIVE JET MACHINING (AJM) |
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Definition
-Removal by fine, abrasive particles in high-velocity gas steam (microscopic sand blasting)
-Parameters are closely controlled, fine abrasive particles, (difference between sand blasting) abrasive is much finer
-You can cut hard, brittle materials (ceramics, glass)
-Applications; cut, debur, clean
-Because tool not in contact in work piece, have no chatter/vibration problems or tool wear. |
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Term
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Definition
NTD increase its distance it creates a wider and shorter cut. The flow of the gas expands causing it.
Cuts determined by not only types of abrasive and gas but also distance to work piece. |
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Term
| ABRASIVE JET MACHINING Advantages |
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Definition
-Good process for problem areas on small parts
-Precise control of high-steam cutting action
-Fast, easy deburring |
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Term
| ABRASIVE JET MACHINING Disadvantages |
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Definition
-Small material removal rates
-Very hard or very soft materials- success not too well documented
-Stray abrasive particles could cause damage
-Dusty operation |
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Term
| AFM (Abrasive Flow Machining) |
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Definition
-Controlled removal of material by flowing under pressure a viscous like abrasive medium through/across work piece
-Ram type action medium is flowed back and forth through cylinders across a stationary work piece |
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Term
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Definition
-Slug formations will produce a variety of stock removal; surface finish and edge finish effects.
-Cut depth depends on pressure applied,size of grain and viscosity of medium
-Medium also acts as cleaning agent. -Carries away WP material |
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Term
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Definition
-Graphite tool that oscillates and travels vertically to the WP
-LOWER PLATEN: graphite block mounted; orbital movement
-UPPER PLATEN: holds abrasive cutting master; vertical movement |
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Term
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Definition
A high velocity, supersonic jet of water does the cutting. Typical pressures are 80,000 psi or 80KSI
Cut width or “kerf” is small because of narrow nozzle opening
Many variables interact. Nozzle orifice diameter, H20 pressure, feed rate and stand-off distance (NTD) |
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