During USM, which of the following vibrates at ultrasonic frequencies? explain: The tool is in Ultrasonic frequencies, which will be in the 20 kHz range. The slurry is passed through this area to bring the abrasive particles into contact with the workpiece. 5.

What is the vibration frequency range of the USM?

operate in Range 200–4000 W and 10–40 kHz. The most common frequency is 20 kHz (out of the audible range) and can be « tuned » to ±10% to provide optimal conditions for a specific tool/workpiece combination.

Why are ultrasonic frequencies used in USM?

In ultrasonic machining, the tool of the desired shape is vibrated at ultrasonic frequencies (19 to 25 kHz). … tools in the USM vibrate at high frequency in a flowing slurry onto the work surface.The main reason for using ultrasonic frequencies is provide better performance.

Which of the following is NOT processed by USMM?

Which of the following materials is not typically processed by USM?Description: USM is mainly used for machining brittle material They are poor conductors of electricity and therefore cannot be processed by electrochemical and electrical discharge machining. 3.

What is the vibration amplitude during ultrasonic machining?

In ultrasonic machining, the tool of the desired shape vibrates at an ultrasonic frequency (19 to 25 kHz) with an amplitude of About 15 – 50 microns above the workpiece.

Ultrasonic Horn – Measure Vibration Amplitude

28 related questions found

What is ultrasonic vibration?

Ultrasonic vibration is Sound waves with frequencies above the audible range. They are subject to the same general laws of physics as ordinary sounds. Their high frequencies and short wavelengths enable them to be used in many applications that depend on the transmission of energy and the directional control of that transmission.

Which tool is used for ultrasonic machining?

There are two types of transducers used in ultrasonic machining; either Piezoelectric or Magnetostrictive: Piezoelectric transducer. It consists of a piece of piezoelectric ceramic, such as barium titanate, coated with two metal electrodes.

Which material is not suitable for USM?

9. Which of the following materials is not suitable for USM? explain: Soft materials such as lead and plastic Not suitable for machining by this process as they tend to absorb abrasive particles rather than chips under impact. 10.

What is the AJM process?

Abrasive jet machining (AJM), also known as abrasive microblasting, pencil blasting and microblasting, is a A sandblasting process that uses abrasives propelled by high-velocity gas to erode material from the workpiece.

Which word best describes roll forming?

Progress It is the objective word that best describes the roll forming process.

What is the frequency of the transducer in USM in Hz?

The device converts low frequency (50/60 Hz) electrical energy to high frequency (20 kHz) electrical energy. The role of the transducer: the high-frequency electrical signal is transmitted to the transducer, and the transducer converts it into high-frequency (15–20 kHz), low-amplitude vibration (5 microns).

What do you mean by ultrasound?

ultrasound, Vibrations with frequencies above the upper limit of the human audible range– That is, greater than about 20 kHz. The term sonic applies to very high amplitude ultrasound waves. … many animals are able to hear sounds in the frequency range of human ultrasound.

What is the use of ultrasonic machine?

Applications of ultrasonic machining are:

Process very precise and complex shaped items. Drill round holes of any shape. Grinding brittle materials. Dissect the hole.

What kind of material is suitable for USM process?

Several different types of abrasives are used in the USM process, including diamond, Cubic Boron Nitride CBN, Boron Carbide, Silicon Carbide and Alumina. Boron carbide is the most widely used abrasive in USM operations.

What type of transducer does USM use?

The sensor vibrates. The sensors used in USM convert electrical energy into mechanical vibrations. USM mainly uses two types of transducers; Piezoelectric transducers or magnetostrictive transducers.

What are the components of USM?

Ultrasonic processing machine by Two main parts transducer and horn (also called horn)connected to the electronic control unit via a cable.
…
main part

• Transducer: The transducer mainly consists of a cylinder made of piezoelectric ceramics. …
• Ultrasound:…
• control unit:

What is the process by which AJM can be used?

AWJM combined Abrasive Jet Machining vs Water Jet Machining (WJM) has created a unique process that overcomes their respective limitations and enhances WJM’s ability to cut, drill and generally clean hard and/or strong materials.

What are the types of abrasives?

What are the types of abrasives?

• Natural abrasives – calcite, diamond, iron oxide, sand, sandstone and powdered feldspar.
• Synthetic Abrasives – Borax, Ceramics, Alumina, Dry Ice, Glass Powder, Steel Abrasives, Silicon Carbide and Slag.

What are the main elements of AJM equipment?

Components and their functions in an AJM setup

• Air compressor. Usually air is drawn directly from the atmosphere, it is first dried and free of dust, and then compressed to high pressure. …
• FRL units. …
• Pressure regulator and flow valve. …
• Abrasive feeder and mixing chamber. …
• nozzle. …
• studio. …
• Modern accessories and controls.

Is ultrasonic machining suitable for stainless steel?

Tool materials typically include mild steel, stainless steel, brass, Monel, bearing steel and molybdenum. Softer materials such as aluminum or brass can experience severe tool wear. Abrasives for the USM process include diamond, cubic boron nitride, boron carbide, silicon carbide and aluminium oxide.

What is the ECM process?

Electrochemical Machining (ECM) is A method of removing metals by an electrochemical process. It is typically used in high volume production for machining extremely hard materials or materials that are difficult to machine using conventional methods.

Which of the following is true about USM?

Which of the following is true about USM? explain: No residual stress is left in ultrasonic machining. The material removal rate in USM is proportional to the particle size of the abrasive used.

How is material removed in ultrasonic machining?

Ultrasonic machining (USM) is the removal of material by Abrasive action of a sand-laden liquid slurry circulating between the workpiece and the tool that vibrates perpendicular to the workpiece at frequencies above the audible range. It differs from most other machining operations because very little heat is generated.

How does ultrasonic machining work?

It works the same as ultrasonic welding.This processing uses Ultrasound generates high-frequency force with low amplitude, as the driving force for the abrasive. Ultrasonic machines generate high-frequency vibration waves with a frequency of about 20,000 to 30,000 Hz and an amplitude of about 25-50 microns.

What are the advantages and disadvantages of ultrasonic machining?

Advantages and disadvantages of ultrasonic processing technology

• This type of process produces less heat.
• You can machine hard and brittle materials in it.
• It can be used for non-circular drilling just like on glass.
• This can be used for hard material threads.