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GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM) | Manufacturing Engineering - Mechanical Engineering PDF Download
[2001]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself: In ECM the MRR is due to
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[2000]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself: Deep hole drilling of small diameter, say 0.2 mm is done with EDM by selecting the tool material as
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[ME 1999 : 1 Mark]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself:Choose the correct statement
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[1999]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself: In EDM, the tool is made of
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[1997]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself: Inter electrode gap in ECG is controlled by
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[1997]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself:Selection of electrolyte for ECM is as follows
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[1993]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself:In ultrasonic machining process, the material removal rate will be higher for material with
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[1992]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself:The two main criteria for s electing the electrolyte in ECM is that the electrolyte should
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[1992]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself:In USM the metal removal rate would ... with increasing mean grain diameter of the abrasive material
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[1989]Question for GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM)Try yourself:In ECM, the material removal rate will be higher for metal with
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FAQs on GATE Past Year Questions: Nonconventional Machining (ECM, EDM, ASM, USM) - Manufacturing Engineering - Mechanical Engineering
| 1. What is nonconventional machining? |  |
Ans. Nonconventional machining refers to the process of removing material from a workpiece using methods other than traditional cutting or grinding. It includes various techniques such as Electrochemical Machining (ECM), Electro-Discharge Machining (EDM), Abrasive Flow Machining (AFM), and Ultrasonic Machining (USM).
| 2. How does Electrochemical Machining (ECM) work? | |
Ans. Electrochemical Machining (ECM) is a nonconventional machining process that uses the principle of electrolysis to remove material from a workpiece. In ECM, a conductive tool is placed in close proximity to the workpiece and a voltage is applied between them. The electrolyte, usually an aqueous solution, acts as a medium for the ion transfer. The material is dissolved from the workpiece by the action of electrochemical reactions, resulting in the desired shape or profile.
| 3. What are the advantages of Electro-Discharge Machining (EDM)? | |
Ans. Electro-Discharge Machining (EDM) offers several advantages over conventional machining methods. Some of the key advantages include:
- Ability to machine complex shapes and intricate details.
- No direct contact between the tool and workpiece, minimizing the risk of tool wear.
- Suitable for machining hard and heat-resistant materials.
- Can be used to machine materials with high toughness or low thermal conductivity.
- Can produce a fine surface finish without the need for secondary operations.
| 4. How does Ultrasonic Machining (USM) work? | |
Ans. Ultrasonic Machining (USM) is a nonconventional machining process that uses the principle of ultrasonic vibrations to remove material from a workpiece. In USM, a slurry of abrasive particles in a liquid medium is used. The tool, known as a horn or sonotrode, is connected to a power source that generates ultrasonic vibrations. These vibrations are transferred to the abrasive slurry, causing the abrasive particles to impact the workpiece and remove material through a combination of mechanical and erosive actions.
| 5. What are the applications of Abrasive Flow Machining (AFM)? | |
Ans. Abrasive Flow Machining (AFM) is commonly used for various applications, including:
- Removing burrs or sharp edges from machined parts.
- Polishing and deburring internal passages or complex shapes that are difficult to access with traditional methods.
- Enhancing the surface finish of components.
- Controlling the flow characteristics or surface roughness of fluid passages, such as in fuel injection nozzles or hydraulic valves.
- Machining intricate features in molds or dies, such as cooling channels, without causing damage to the mold surface.
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