Podcast
Questions and Answers
What is a key advantage of Wire-EDM compared to other methods?
What is a key advantage of Wire-EDM compared to other methods?
- Saves machining and material costs (correct)
- Requires bulk electrodes
- Ability to cut non-electrical-conductive materials
- Inability to achieve fine geometries
Which material is Wire-EDM especially suitable for cutting?
Which material is Wire-EDM especially suitable for cutting?
- Tungsten carbide (correct)
- Silicon
- Glass
- Polymers
What are the common shapes achievable using EDM processes?
What are the common shapes achievable using EDM processes?
- Flat surfaces only
- Deep slots and narrow openings
- Curved surfaces with intricate patterns
- Cavities, slots, and holes (correct)
For what purpose might bulk-material removal be done before using EDM?
For what purpose might bulk-material removal be done before using EDM?
What is a limitation of EDM processes in terms of materials they can cut?
What is a limitation of EDM processes in terms of materials they can cut?
In the context of EDM processes, what is a suitable post-processing method often used after tool-making?
In the context of EDM processes, what is a suitable post-processing method often used after tool-making?
Why does high-rate EDM cutting lead to poor surface integrity?
Why does high-rate EDM cutting lead to poor surface integrity?
What is a characteristic of the wire used in Wire EDM?
What is a characteristic of the wire used in Wire EDM?
How does high surface finish impact the EDM process?
How does high surface finish impact the EDM process?
What is an essential requirement for the wire used in Wire EDM?
What is an essential requirement for the wire used in Wire EDM?
In Wire EDM, what is the typical travel speed range for the wire?
In Wire EDM, what is the typical travel speed range for the wire?
What parameter is used to measure the removal rate in Wire EDM?
What parameter is used to measure the removal rate in Wire EDM?
What are the applications of EDM to Moulds-making as mentioned in the text?
What are the applications of EDM to Moulds-making as mentioned in the text?
Why is maintaining the gap between the tool and the workpiece important in EDM?
Why is maintaining the gap between the tool and the workpiece important in EDM?
How does wire EDM work and why is it efficient and flexible compared to Die-sink EDM?
How does wire EDM work and why is it efficient and flexible compared to Die-sink EDM?
What is one of the significant influences on the EDM process and product quality?
What is one of the significant influences on the EDM process and product quality?
Which roles does a dielectric fluid play in EDM?
Which roles does a dielectric fluid play in EDM?
How should an electrode material be selected for Die-sink EDM?
How should an electrode material be selected for Die-sink EDM?
What is the key function of a telescope in mask-based laser ablation?
What is the key function of a telescope in mask-based laser ablation?
Which step in laser machining involves the projection of the laser onto a mask representing the desired intensity distribution?
Which step in laser machining involves the projection of the laser onto a mask representing the desired intensity distribution?
In laser machining, what are the three surface/material parameters that significantly influence the process?
In laser machining, what are the three surface/material parameters that significantly influence the process?
Why is 3D laser cutting considered more efficient than single beam laser cutting?
Why is 3D laser cutting considered more efficient than single beam laser cutting?
What are the main design considerations for laser-machining processes?
What are the main design considerations for laser-machining processes?
Compared to Chemical etching and EDM, what advantage does Laser machining offer in material processing capabilities?
Compared to Chemical etching and EDM, what advantage does Laser machining offer in material processing capabilities?
What is the function of a Nd:YAG crystal in lasers?
What is the function of a Nd:YAG crystal in lasers?
Which laser type is commonly used for welding metals?
Which laser type is commonly used for welding metals?
What is the main application of a ruby laser?
What is the main application of a ruby laser?
In laser machining with two beams, what concept does the process emulate?
In laser machining with two beams, what concept does the process emulate?
What does CW in CWCO2 laser stand for?
What does CW in CWCO2 laser stand for?
Which laser type is commonly used for microelectronic device production?
Which laser type is commonly used for microelectronic device production?
Which laser type is commonly used for surface treatment of metals?
Which laser type is commonly used for surface treatment of metals?
What is the crystal used as a lasing medium for solid-state lasers?
What is the crystal used as a lasing medium for solid-state lasers?
In laser machining, which laser type emulates the actions of a mechanical tool?
In laser machining, which laser type emulates the actions of a mechanical tool?
What is the meaning of PC in PCO2 laser?
What is the meaning of PC in PCO2 laser?
Which type of laser is commonly used for drilling plastics?
Which type of laser is commonly used for drilling plastics?
What does CW stand for in CWCO2 laser?
What does CW stand for in CWCO2 laser?
Which laser type is suitable for marking and engraving ceramics?
Which laser type is suitable for marking and engraving ceramics?
'Excimer' laser was originally short for what?
'Excimer' laser was originally short for what?
What does Nd stand for in Nd:YAG laser?
What does Nd stand for in Nd:YAG laser?
What is the main application of a ruby laser?
What is the main application of a ruby laser?
Study Notes
- Applications of EDM in mould-making include microstructured referential workpieces, mould inserts for hot embossing micro opto-electronic connecting plugs, and microgears for micro planetary drives.
- Moulds are widely used in manufacturing parts like mobile phone covers, TV frames, car panels, and functional components of miniature devices.
- Die-sink Electro-discharge machining requires a dielectric fluid, proper gap maintenance between tool and workpiece, and careful selection of electrode material.
- Wire EDM is more efficient and flexible compared to Die-sink EDM as it allows for finer geometry, controlled motion of the workpiece, drilling micro-size holes, and polishing fragile tools.
- EDM process variants include Die-Sinking, WEDM, ED-Drilling, ED-Milling, EDG, and WEDG, suitable for cutting any electrical conductor material, especially hard metals like tool steels and tungsten carbide.
- Micro/Nano-EDM allows for rough cutting, polishing, and grinding, with parameters like spark intervals, current density, and voltage influencing the process and product quality.
- Wire EDM offers merits such as using no bulk electrodes, achieving high surface finish, and cutting materials with a wire diameter as small as 0.01mm.
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Description
Test your knowledge on spark intervals, current density, voltage, and high-rate EDM cutting. Learn about the requirements, effects of high energy input, temperature, heat-affected zone, cooling rate, and surface integrity in high-rate EDM cutting processes.
