What is the formula for material removal rate?

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What is the formula for material removal rate?

MRR = (D x W x F / 1000) cc/min.

What is MRR in water jet machining?

Mathematical formula for material removal rate (MRR) in abrasive jet machining (AJM) can be modeled by equating kinetic energy of each abrasive particle with the energy required for creating an indentation of certain cord length on a specific material.

What is the unit of MRR?

The material removal rate (MRR) is defined as the amount of material removed per unit time, and it typically has units of mm3/min or in3/min.

What are the tolerance limit values in abrasive water jet machining?

What are the tolerance limit values in Abrasive water jet machining? Explanation: In Abrasive jet machining, tolerance limit values range between ± 0.05 mm. 15.

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How do you calculate removal rate?

Phrased in another way, the MRR is equal to the volume of residue formed as a direct result of the removal from the workpiece per unit of time during a cutting operation. The material removal rate in a work process can be calculated as the depth of the cut, times the width of the cut, times the feed rate.

How is machining rate calculated?

Machine hour rate is obtained by dividing the total running expenses of a machine during a particular period by the number of hours the machine is estimated to work during that period.

What is the general power rating of the hydraulic pump used in WJM?

about 30 kW
5. What is the general power rating of the hydraulic pump, used in WJM? Explanation: The power rating of the motor of hydraulic pump, which is used in WJM is about 30 kW.

How is the material removal rate in abrasive water jet machining?

The material removal rate is 18.95 mm3/sec for fiber orientation compared to 18.26 mm3/sec for 60° and 17.4 mm3/sec for 90° fiber orientation. The value for 45° fiber orientation is 4.911 µm and for 60° and 90° fiber orientation it is 4.927 µm and 4.974 µm, respectively.

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Is MRR is high or low in USM?

Fine grains give good surface finish, but MRR is low. In USM process, the abrasive of about 30 to 60\% by volume are suspended in liquid medium.

Which of the following factor affects the MRR quite significantly?

Explanation: Material removal rate not only depends on work piece material but also the tool material. 3. Which of the following factors influence the material removal rate? Explanation: The factors such as pulse conditions, electrode polarity and machining medium also affect the material removal rate.

What happens to MRR with increase in tool amplitude?

1. What happens to MRR with increase in tool amplitude? Explanation: As amplitude of the tool increases, rate of material removal increases. If splashing occurs, it will result in an increase of material removal rate in USM.

What is the value of stand off distance in Water jet machining?

What is the value of stand-off distance in Water jet machining? Explanation: Stand-off distance value ranges between 2.5 – 6 mm in Water jet machining.

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What is MRR in abrasive jet machining (AJM)?

Mathematical formula for material removal rate (MRR) in abrasive jet machining (AJM) can be modeled by equating kinetic energy of each abrasive particle with the energy required for creating an indentation of certain cord length on a specific material.

What is abrasive jet machining?

Abrasive jet machining (AJM) is one of the advanced machining processes (mechanical energy based) where a high velocity jet of abrasives is utilized to remove material from work surface by impact erosion. The abrasive jet is obtained by accelerating fine abrasive particles in highly pressurized gas (carrier gas).

How does abrasive size affect MRR?

Size of abrasives also influences quality of cut as well as material removal rate. Larger grit size tends to produce larger cavity and thus MRR improves with the sacrifice of surface finish. On the other hand, fine abrasives reduce MRR but improve surface quality and accuracy.

Can MRR be estimated for ductile and brittle materials?

On the basis of few assumptions, MRR can be estimated both for ductile materials and for brittle materials, as they behave differently in crater formation. You can read these assumptions as well as entire modeling by clicking the corresponding links.