Explanation: In ECM, material removal is due to Atomic dissolution of working material. Electrochemical dissolution is governed by Faraday’s law. Also, for ECM, MRR= IA/(Fρv), where I= current, ρ= material density, A= atomic weight, v= valence, and F= Faraday constant.

What is MRR in the ECM process?

material removal rate (MRR) is an important feature to evaluate the efficiency of a. Unconventional processing techniques. In ECM, material removal occurs due to atomic dissolution of the working material. Electrochemical dissolution is governed by Faraday’s law.

What are the factors that affect MRR in the ECM?

The effects of different electrochemical machining (ECM) factors are (current, gap and electrolyte concentration) Prediction (material removal rate). Note that the connection poles used are copper. By using analysis of variance (ANOVA) it was found that the effect of large parameters on MRR was 75% of the current and 15% of the gap.

Which law governs MRR in the ECM process?

Metal removal rate calculation

In an electrolytic cell (ECM cell), the material removal rate is controlled by Faraday’s law of electrolysis.

Which of the following artifact attributes affects MRR during ECM?

Note: The ECM process can only machine conductive workpieces.In this process the workpiece material acts as a anode, so the chemical properties of the anode material largely determine the MRR. 5.

ECM I Material Removal Rate (MRR) I Clearance Resistance I Feed Rate I Flow Rate I Video-II

22 related questions found

Dependent in ECM?

Explanation: In ECM, material removal is due to Atomic dissolution of working material. Electrochemical dissolution is governed by Faraday’s law. Also, for ECM, MRR= IA/(Fρv), where I= current, ρ= material density, A= atomic weight, v= valence, and F= Faraday constant. 5.

What are the different types of ECM operations?

Some very basic applications of ECM include:

• Die cutting operation.
• Drilling jet engine turbine blades.
• Porous drilling.
• Processing steam turbine blades to a limited extent.
• Micromachining.
• Outlines and contours.
• Rifled barrel.

What are the disadvantages of ECM?

shortcoming

• In the presence of salt water and acidic electrolytes, the risk of corrosion to tools, w/p and equipment increases.
• Electrochemical machining can only process conductive materials.
• Power consumption is high.
• The initial investment cost is high.

What is the main function of electrolytes in the ECM?

electrolyte.The electrolyte has three main roles in the ECM process; it Carrying current between tool and workpiece,4,25,31 It removes the reaction products from the IEG2,5,9,10,29,31-33 and removes the heat generated by the passage of electric current.

What is the main role of electrolysis in the ECM?

The electrolyte has three main functions in the ECM process.it Carrying current between tool and workpiecewhich removes the reaction products from the cutting zone and removes the heat generated by the current in operation.

What voltage values ​​are used in the ECM?

Note: High current densities in the range of 0.5 – 5 A/mm2 are used in the ECM. 2. What voltage values ​​are used in the ECM? explain: Low voltage, ranging from 10 to 30 V For electrochemical machining.

What are the process parameters in ECM?

The ECM parameters that affect MRR and surface roughness targets are Applied Voltage, Tool Feed Rate, and Electrolyte Discharge Rate [5–7]. The electrolyte flows through the inter-electrode gap (IEG), when the IEG value is small, the processing reaction is very obvious [8, 9].

Which of the following is true about ECM?

Which of the following is true about ECM? Explanation: In ECM, Corrosion of metals occurs in the reverse process of electroplating.

What is the self-tuning function of the ECM?

When a small hole is formed on the bottom surface of the workpiece, the internal flushing fluid will flow out from the small hole, resulting in the state of no deionized water in the gap.​​​ Working fluid in the gap Then, it will adjust itself to the electrolytes, which in turn will…

What is the material removal rate of ECM?

ECM was initially done using 2mm brass rod electrodes and 1mm thick workpiece material.For a 6 mm brass electrode, the MRR becomes 5.74 x 10-4 g/sec and 2.53 x 10-4 g/s for 1 mm thick stainless steel and aluminium respectively.

What are the economic aspects of the ECM process?

Power consumption, processing time, electrolyte and labor costs is the main factor used as the control factor. Experimental results show that the amperage value is greatly affected by any change in either tool geometry for the volume metal removal rate.

Which electrolyte is used in the ECM process?

One of the most commonly used electrolytes in ECM processes is Concentrated Sodium Chloride (NaCl). It is used to machine stainless steel when a very shiny finish is required. Sodium chloride does not create a coating on stainless steel, which allows the workpiece to be machined easily and quickly.

What happens when the current density in the ECM is low?

What happens when the current density in the ECM is low? Explanation: When the current density is lower than the optimum value, Undesirable etching and pitting then occur. . . Explanation: An increase in the electrolyte flow reduces the formation of anode products, thereby reducing the rate of film formation.

What are the other characteristics of the electrolyte in the ECM?

What are the other characteristics of the electrolyte in the ECM?Description: Electrolyte Should be non-toxic, less sticky and less corrosive.

What are the advantages of the ECM process?

ECM – Advantages

• Non-thermal processing: No thermally related stress means that the material properties of the surface remain unchanged after ECM. …
• Surface finish: The ECM process is capable of producing very low surface roughness values. …
• Mass Production: Low tool wear makes the ECM process ideal for mass production.

What are the advantages and disadvantages of ECM?

Advantages and disadvantages:

A single tool can be used to machine a large number of workpieces. Theoretically no tool wear occurs. The machining of metals is independent of the strength and hardness of the tool. ECM provides a very high surface finish.

What are the advantages and disadvantages of the ECM process?

Advantages and disadvantages of electrochemical machining

• The machining speed does not depend on the hardness of the workpiece material.
• Tools do not wear out. …
• There is no stress on the workpiece surface.
• No burrs are formed during processing.
• High surface quality can be achieved.

Who first introduced the ECM patent?

Of the following scientists, who was the first to introduce the ECM patent? explain: Gusev The same man who introduced the first ECM patent in 1929.

Why is there no tool wear in the ECM?

No tool wear in the ECM If there is no short circuit during processing. If a short circuit occurs, the workpiece and electrode may be damaged.