|
|
|||
|
|
|||
|
From itlinc.com
The efficiency of Ultrasonic Peening (UP) application for fatigue life improvement of automotive welded wheels was studied based on the results of fatigue testing of real wheels in as-welded condition and after application of the UP. During the fatigue loading, the cracks initiate in the weld toe zone at the start and the end areas of the welds. Firstly, the fatigue cracks are observed on the surface and, with the increase in the number of loading cycles, the cracks propagate through the thickness of the material in the rim area causing at certain stage the air leakage. The improvement treatment of welded wheels was performed using the Computerized Complex for UP. On average, the speed of UP of weld toe was about 0.5 m/min. The crack propagation rate in welded wheel subjected to UP was significantly lower than the fatigue crack propagation rate in the wheel in as-welded condition. The comparison of the fatigue life, using the same crack length criterion, had shown that the UP treated welded wheels demonstrated three times longer fatigue life that the same automotive wheel in as-welded condition.
Products & Services
Roller bearings are used in rotary applications to replace sliding movement with low friction, rolling motion. The principal types of roller bearings are cylindrical, spherical, and tapered.
Sandblasting and shot peening services bombard media against a surface to meet surface condition requirements. Sandblasting uses abrasive grain to roughen, smooth, shape or clean surfaces. Shot peening uses rounded media to strengthen or dimple a surface.
Abrasive blast machines and sandblasters clean and prepare surfaces by directing a stream of abrasive particles against a part or a surface.
Wheels are solid discs or rigid circular rings that attach to assemblies such as casters to allow movement. They are connected to a hub and designed to turn around an axle.
Blast media and blasting abrasives are consumables used in surface preparation processes, such as sandblasting and peening.
Product Announcements
Topics of Interest
The Ultrasonic Peening (UP) is the most efficient technique for increasing the fatigue life of welded elements as compared to such existing improvement treatments as grinding, TIG-dressing, shot...
(Read More)
The development of the Ultrasonic Peening (UP) technology was a logical continuation of the work done before and directed at the investigation and further development of known techniques for surface...
(Read More)
The development of the Ultrasonic Peening (UP) technology was a logical continuation of the work done before directed on the investigation and further development of known techniques for surface...
(Read More)
The residual stresses have a significant effect on the process of the initiation and propagation of the fatigue cracks in welded elements. In this paper the results of the residual stress measurement...
(Read More)
In many cases the residual stresses are one of the main factors, determining the engineering properties of parts and structural components. This factor plays a significant role in fatigue of welded...
(Read More)
Technical Articles
Application of Ultrasonic Peening for Fatigue Life Improvement of Automotive Welded Wheels (.pdf)
- Surface Coating and Protection
|
|
