Methods of flaw detection: ultrasonic flaw detection, magnetic particle inspection, penetration (coloring) inspection, etc. Aluminum window screen is a high-quality fiber mesh used to make doors and windows, usually made of aluminum alloy materials. Aluminum window screens are waterproof, corrosion-resistant, and abrasion-resistant, while keeping insects and other pests out of the room while keeping air and sunlight flowing. It is a commonly used door and window guardrail in the field of home and construction, which provides safety and convenience for people and prolongs the service life of home and building facilities. Aluminum alloy window screens can also be customized in size and color according to needs to match the appearance of the building and improve the appearance quality of the building. Aluminum Window Screen,Aluminum Insect Screen,Aluminum Alloy Window Screen,Aluminum Mosquito Screen wuqiang huihuang fiberglass factory , https://www.hh-windowmesh.com
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Flaw detection: Detection of cracks or defects inside metal materials or components.
Non-destructive testing: The surface and internal quality of the parts to be inspected are checked without damaging the working condition of the workpiece or raw materials.
Common non-destructive testing methods: ultrasonic flaw detection, magnetic particle inspection, penetration (coloring) inspection, etc.
1 Ultrasonic flaw detection is a method of inspecting part defects by using ultrasonic energy to penetrate deep into the metal material and reflecting from the edge of the interface to the other section. When the ultrasonic beam is transmitted from the surface of the part by the probe When the inside of the metal encounters the defect and the bottom surface of the part, the reflected wave occurs separately, and a pulse waveform is formed on the fluorescent screen, and the position and size of the defect are judged based on the pulse waveform.
2. Principle of magnetic particle flaw detection: When the workpiece is magnetized, if there is a defect on the surface of the workpiece, magnetic flux leakage occurs due to the increase of the magnetic resistance at the defect, forming a local magnetic field, and the magnetic powder shows the shape and position of the defect here. Determine the existence of defects.
Some parts need to be demagnetized after magnetic particle inspection:
The remanence of some rotating parts will attract iron filings and cause frictional damage during rotation. For example, shaft bearings, etc., the remanence of some parts will cause the nearby instrument to indicate abnormality.
3 basic principles of penetration (coloring) flaw detection:
The capillary phenomenon is used to infiltrate the permeate into the defect, and the surface permeate is removed by washing, and the permeation in the defect remains. The capillary action of the developer is used to adsorb the residual permeate in the defect to achieve the purpose of testing defects.