What is hybrid machining processes?
Hybrid machining processes are based on the simultaneous and controlled interaction of machining mechanisms and/or energy sources/tools having a significant effect on the process performance to get the benefits and also to overcome the limitation of constituent individual process.
Which one is an example of hybrid machining?
One of the most common methods of hybrid manufacturing is to apply additive and subtractive processes in sequence. For example, the machine could 3D print a near-net shape component that takes the place of a conventional casting or forging. Then, its subtractive capabilities could be applied to finish this part.
What are the different types of machining processes?
The three principal machining processes are classified as turning, drilling and milling. Other operations falling into miscellaneous categories include shaping, planing, boring, broaching and sawing.
What are hybrid processes why they are common these days give their advantages and applications?
Hybrid machining systems come with many advantages over additive or subtractive machining alone. For one, it cuts down on material costs. Because a hybrid machine uses additive features to add material, it can build and repair broken parts.
What is hybrid micromachining?
The hybrid micro-machining process employs simultaneous or ensuing action of two or more machining processes or takes aid of some energy assistance in material removal to enhance advantages and minimize potential disadvantages found in individual material removal techniques.
What is AJM process?
Abrasive jet machining (AJM), also known as abrasive micro-blasting, pencil blasting and micro-abrasive blasting, is an abrasive blasting machining process that uses abrasives propelled by a high velocity gas to erode material from the workpiece.
What are the types of abrasives?
Some naturally occurring abrasives are:
- Calcite (calcium carbonate)
- Emery (impure corundum)
- Diamond dust (synthetic diamonds are used extensively)
- Novaculite.
- Pumice.
- Iron(III) oxide.
- Sand.
- Corundum.
Which gas is used in abrasive jet machine?
How does the abrasive jet produce? In abrasive jet machining jet is produced by mixing the gas with abrasive particles. The gas used is called as carrier gas. Some of the most common carrier gases employed are air, carbon dioxide nitrogen.
What are transfer mediums used in AJM process?
AJM utilizes various abrasives including alumina, silicon carbide, glass beads, sodium bicarbonate, etc.; whereas sand blasting predominantly utilizes only silica sand (SiO2).
What is AJMM?
AJMM is a promising technique to three-dimensional machining of. glass and silicon in order to realize economically viable micro- electro-mechanical systems (MEMS) It employs a mixture of a fluid (air or gas) with abrasive particles.
What are the process parameters affecting the MRR in AJM?
The Major Process Parameters that affects the MRR & KERF in AJM are Gas Pressure, Nozzle diameter, Abrasive mass flow rate, Nozzle tip distance [3]. The cut or the hole generated in AJM with a width is called as KERF. The top kerf is wider than the bottom kerf.
What are the operating parameters in AJM?
The process can be easily controlled by varying the parameters such as Velocity, Flow rate, Pressure, Standoff distance, Grit size, and nozzle angle. Abrasive jet machining (AJM) is a nontraditional machining process which operates work- piece without producing heat and shock.
What is AJM mixing ratio?
What is mixing ratio in abrasive jet machining? Mixing ratio (M) is defined as the ratio of mass flow rate of abrasive particles to the mass flow rate of carrier gas. Since it is the ratio between two mass flow rates, it is a unitless and dimensionless quantity.
What is AJM Manufacturing?
Electrolyte jet machining (EJM) [1, 2] is an adaptation of electrochemical machining. In EJM, a workpiece is machined only in the area hit by the electrolyte jet which is ejected from a nozzle. Even three-dimensional shapes can be machined by controlling the current and dwelling time of the jet over the workpiece [4].
What is the full form of WJM in advanced machining processes?
Explanation: The full form of WJM is water jet machining in advanced machining processes.
What is the percentage of the abrasives and water in the mixture * A 20% water and 80% abrasives B 80% water and 20% abrasives C 30% water and 70% abrasives D 70% water and 30% abrasives?
What is the percentage of the abrasives and water in the mixture? Explanation: Abrasive mixture consists of 70 percent water and 30 percent abrasives.
What are the values of current used in ECG?
Explanation: The speeds used in ECG will range from 20 to 35 m/sec. 9. What are the values of current used in ECG? Explanation: The values of current in Electro chemical grinding range from 50 to 300 A.
What are the values of jet velocities in water jet machining *?
What are the values of jet velocities in Water jet machining? Explanation: Velocity of the water jet stream ranges between 540 – 1480 m/s in WJM.
What is the principle of water jet machining?
This process works on basic principle of water erosion. In this process, a high speed well concentrated water jet is used to cut the metal. It uses kinetic energy of water particle to erode metal at contact surface.
What is the pressure range in water jet machining?
Process. There are six main process characteristics to water jet cutting: Uses a high velocity stream of Ultra High Pressure Water 30,000–90,000 psi (210–620 MPa) which is produced by a high pressure pump with possible abrasive particles suspended in the stream.