A yoke has an electric coil in the unit creating a longitudinal magnetic field that transfers through the legs to the examined part. The yoke technique is easy to use with minimal training. It can be used indoors, outdoors, inside vessels and tanks, and in all positions.
How does a MPI yoke work?
Magnetic Yokes performs Magnetic Particle Inspection (MPI testing) that detects all surface- and near surface- cracks which, corresponding to their position and size, proportionally influence the magnetic field.21 jun 2018
What is a magnet yoke?
A magnetic Yoke is a portable device for detecting surface and sub-surface cracking in any ferro-magnetic material.
What is prod in NDT?
Two hand-held electrodes which are pressed against the surface of a part to make contact for passing magnetizing current through the metal. The current passing between the two contacts creates a field suitable for finding defects with magnetic particles.
How do you use a magnetic yolk?
https://www.youtube.com/watch?v=N1emHJD0-1E
What type of magnetic field does a yoke produce?
The magnetic bias field can be generated with a U-shaped magnetic yoke. This yoke can be laid out as an electromagnet or permanent magnet system. The figure is a cross section of a probe showing the two wires of the flat rectangular or circular coil. The current flows in opposite directions in the wires.
What does an electrical yoke produce?
Yokes are the power tools for Magnetic Particle Inspection. These handheld electromagnets create a magnetic field in a Steel (Ferrous) work piece. Particle Mobility, are the forces that effect the movement of Magnetic Particles on the surface of the work piece.
What is yoke in NDT?
permanent magnets, electromagnets. A magnet that induces a magnetic field in the area of a part that lies between the poles. Yokes may be permanent magnets or electromagnets.
Which form of testing uses a yoke method?
An effective MPI test usually involves tests in more than one direction. Weld inspections using yokes are usually done using an "X" pattern thereby inducing longitudinal magnetizations in 2 directions at right angles to each other.
How does a magnetic yoke work?
Magnetic yoke is a hand-held device that induces a magnetic field between two poles. ... The draw back of magnetic yokes is that they only induce a magnetic field between the poles, so large-scale inspections using the device can be time-consuming.
Why is a yoke used?
A yoke is a wooden beam used to help carry or pull heavy objects by distributing the weight evenly on both shoulders and can be used by humans and animals a like.
What is a yoke used for in farming?
A yoke is a piece of wood placed on the heads or necks of oxen which is used for pulling farm implements. ... The yoke is placed on the neck of the animals. When the oxen pull, the yoke settles down in the right place. Farmers can easily make such a yoke, or the village blacksmith or carpenter can do it.
What is yoke culture?
YOKE culture Community. Conscious Conversations. Believing in the power of creativity and unity to inspire transformation #supperunyoked #beautythesilentrevolution yokemagazine.com/foodwisdom.