What are the material used for nozzle manufacturing in AJM process?

AJM nozzle is usually made of tungsten carbide or sapphire ( usually life – 300 hours for sapphire , 20 to 30 hours for WC) which has resistance to wear.

Herein, what is the material of nozzle in the AJM process?

AJM nozzle is usually made of tungsten carbide or sapphire ( usually life – 300 hours for sapphire , 20 to 30 hours for WC) which has resistance to wear. The nozzle is made of either circular or rectangular cross section and head can be head can be straight, or at a right angle.

Likewise, what is the function of nozzle in AJM process? A nozzle is used to convert this pressure energy into kinetic energy and also to direct the jet towards work surface at a particular angle (impingement angle). Upon impact, hard abrasive particles gradually remove material by erosion and sometime assisted by brittle fracture.

Additionally, what is the life of tungsten carbide material nozzle in abrasive jet machining?

For average material removal, tungsten carbide nozzles have a useful life of 12 to 30 hours, and sapphire nozzles last about 400 hours. The distance of the nozzle from the workpiece affects the size of the machined area and the rate of material removal.

Which type of materials are better suited for AJM?

The AJM process is best suited for machining brittle and heat-sensitive materials like glass, quartz, sapphire, ceramics, etc. It is used for drilling holes, cutting slots, cleaning hard surfaces, deburring, polishing, radiusing.

Related Question Answers

What are the limitations of AJM?

Disadvantages of AJM:

• AJM is suitable only for brittle materials as MRR is high for brittle materials.
• Machining accuracy obtained is poor.
• MRR is low i.e. up to 0.05cm2 /hr.
• There is always a chance of abrasive particles getting inserted in the work materials hence cleaning needs to be done after machining.

Which of the following is correct about ECM?

Which of the following is correct about ECM? Explanation: In ECM, erosion of metal takes place as reverse process of electroplating.

What is the full form of WJM in advanced machining processes?

7.1. 1 Mechanical micromachining. Mechanical Micromachining process involves ultrasonic machining (USM), abrasive jet machining (AJM), water jet machining (WJM), etc. These micromachining processes mainly use mechanical forces to remove materials.

Which gas is used in abrasive jet machining?

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. Oxygen is never used as a carrier gas as it may oxidize the surface of the work piece.

Which motion is responsible to determine the geometry of jobs to be machined?

Relative motion

Which of the following process has highest rate of metal removal?

Electro-Chemical Machining

What is the basic mechanism of material removal in AJM process?

Mechanism of material removal in abrasive jet machining (AJM) is impact erosion. Mechanical erosion is basically a combination of cutting wear and deformation wear.

Which is softer material in USM?

4. Which is softer material in USM? Explanation: Tool is softer than work piece in USM.

What are the factors that affect the material removal rate in AJM process?

Material removal rate (mmr). 4. These factors are in turn affected by, •The abrasive Composition; strength; size; mass flow rate. The gas Composition, pressure and velocity.

Which of the following material Cannot be used for making of nozzle in abrasive jet machining?

10. Which of the following material/s cannot be used for making of nozzle in Abrasive jet machining? Explanation: Nozzle in Abrasive jet machining is made up of sapphire or WC. 11.

Why abrasive is not recycled in AJM?

Abrasive powders cannot be reused as the sharp edges are worn and smaller particles can clog the nozzle. 8. Short stand off distances when used for cutting , damages the nozzle.

Which of the following property ies of nozzle does not affect the material removal rate in water jet machining?

Explanation: In the nozzle, outside temperature has no effect on the rate of material removal.

What are the process where abrasive jet machining can be used?

Explanation: Abrasive jet machining can be used for cutting, drilling, deburring and cleaning processes.

What is the velocity of water jet stream in water jet machining?

Explanation: Velocity of water jet stream that is used in Water jet machining is about 900 m/sec.

What happens to MRR with increase in tool amplitude?

Explanation: As amplitude of the tool increases, rate of material removal increases. Explanation: Amplitude determines the velocity of abrasive particles between tool and work piece. 3. If splashing occurs, it will result in an increase of material removal rate in USM.

What is ultrasonic machining process?

Ultrasonic machining is a subtractive manufacturing process that removes material from the surface of a part through high frequency, low amplitude vibrations of a tool against the material surface in the presence of fine abrasive particles.

What are the materials used for abrasives in abrasive water jet machining?

Different types of abrasives are used in abrasive water-jet machining like garnet, aluminum oxide, olivine, silica sand, silicon carbide, etc.

In which process the material is removed due to the action of abrasive grains?

Ultrasonic Machining - Material removed in action of abrasive grains - Manufacturing Processes - 2.

What is the principle of abrasive jet machining?

In abrasive jet machining process, a stream of abrasive particles carried by the high-pressure gas or air is made to effect on the work surface through a nozzle, and the work material is removed by erosion due to the high-velocity abrasive particles.

What is the percentage of the abrasives and water in the mixture?

5. What is the percentage of the abrasives and water in the mixture? Explanation: Abrasive mixture consists of 70 percent water and 30 percent abrasives. 6.

What is the material removal mechanism of laser beam machining process?

What is the material removal mechanism of Laser beam machining process? Explanation: The material is removed by melting and evaporation in Laser Beam Machining process.

What is the frequency of mixing chamber consisting of gas and abrasives?

Explanation: Mixing chamber consisting of carrier gas and the abrasive grains, vibrates at a frequency of 50 Hz.

In which of the following industries non traditional machining methods play an important role?

In which of the following industries, Non-traditional machining methods play an important role? Explanation: Non-traditional methods are used widely in many industries. c) Chemical and electro-chemical. Explanation: In this machining, heat is the source of energy.

What are the advantages of USM?

The advantages of Ultrasonic Machining are:

• This process is used for drilling both circular and non-circular holes in very hard materials like carbide, ceramics, etc.
• This process is best suited for brittle materials.
• The machining operation is simple and requires less time.
• This process is economical.

In which process mechanical energy used for material removal?

USM is mechanical material removal process or an abrasive process used to erode holes or cavities on hard or brittle work piece by using shaped tools, high frequency mechanical motion and an abrasive slurry.

Which of the following material is not generally machined by USM?

2. Which of the following material is not generally machined by USM? Explanation: USM is mainly used for machining brittle materials which are poor conductors of electricity and thus cannot be processed by Electrochemical and Electro-discharge machining. 3.

What are the different types abrasives used in AJM?

In AJM, a focused steam of abrasive particles carried by high pressure gas is used. Uniform particles of sand, steel grit, copper slag, walnut shells, and powdered abrasives are used. Silicon carbide, aluminium oxide, glass beads, dolomite, sodium bicarbonate are used as abrasives.

What are the disadvantages of ECM?

Disadvantages

• The risk of corrosion for tool, w/p and equipment increases in the case of saline and acidic electrolyte.
• Electrochemical machining is capable of machining electrically conductive materials only.
• High power consumption.
• High initial investment cost.

Which of the following is unconventional machining process?

1. Which of the following is an unconventional process of machining? Explanation: WJM stands for water jet machining and it is an unconventional process of machining.

What are the processes and applications where water jet machining can be used?

What are the processes and applications, where Water jet machining can be used? Explanation: Water jet machining can be used for drilling, cutting, deburring, surface treatment and many more applications.

Which types of lasers are used in laser beam machining?

There are a number of laser types developed in the solid-state category in which Nd:YAG is majorly used for LBM applications. Solid-state lasers such as Nd:YAG, ruby and Nd-glass are highly used for machining metallic materials. Nd:YAG lasers can also be used to ceramic materials.

When machining porous material which type of mechanism is introduced?

4. When machining porous material, which type of mechanism is introduces? Explanation: Material removal of porous material takes place by erosion. 5.

What is Jet Machine?

A water jet cutter, also known as a water jet or waterjet, is an industrial tool capable of cutting a wide variety of materials using an extremely high-pressure jet of water, or a mixture of water and an abrasive substance. Waterjet cutting is often used during fabrication of machine parts.

What is the use of delivery system in the machining system of AWJM?

Explanation: Abrasives are fed into the water jet stream through suspension or injection. 3. What is the use of delivery system in the machining system of AWJM? Explanation: In Abrasive water jet machining, water delivery system is used.

In which of the following gases is not used in AJM?

Pure oxygen is not used as a carrier gas in abrasive jet machining (AJM) because of the following reasons. It can quickly oxidize the work surface. It is inflammable. It is costlier.