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What is shot peening?

In the past, the hammer was used to increase the hardness of gold. As new technologies came and manufacturing evolved, shot peening gained strength and became a trend. The result generated by shot peening is an increase in the lifespan and the capacity of the parts. In addition, it improves the metallurgical characteristics, eliminates cracks, and brings more resistance to friction.


Below we enumerated the main questions about shot peening:


1. What is shot peening for.

2. Where shot peening can be applied.

3. Difference between shot peening and traditional blasting.



1. What is shot peening for.


Shot peening is a solution for intensive use of industrial components under mechanical or thermal fatigue. It is a high technology process that uses blasting, cleaning up the surface. In this process, the residual tension of parts switches to a residual compression effort. Shot peening can be used on treatment surfaces such as grinding, milling, folding or thermal treatment. It is commonly used in the manufacturing, automotive, and aerospace industries.


Shot peening is similar to blasting, except that it works with plasticity instead of abrasion. Each particle works like a "hammer ball" and that means that less material is removed in the process.


2. Where shot peening can be applied.


• Aerospace industry: it is the one that proportionally most uses shot peening. An infinity of aircraft components is treated with this method. Among them, the blast wheel, the structural and landing gear components.



• Automotive industry: springs, gears, torsion bars, connecting rods, crankshafts, axles, and suspension arms.

• Metal-mechanical industry: cutting tools, stamping, forging (mainly cold).



3. Difference between shot peening and traditional blasting.


Man using automatic shot peening machine with a robot.
Automatic shot peening machine with a robot.

3. Difference between shot peening and traditional blasting.



The traditional blasting works with spherical and angular media. Shot peening uses only spherical abrasives and has several controls, way more sophisticated and restricted than conventional blasting. See some examples:


• Particle size control.

• Spherical control (disposal).

• Real-time monitoring and correction of the volume of abrasive used.

• Real-time monitoring and correction of abrasive speed.

• Control of blasting angles and distance.

Check out the details of a blasting shot peening machine operated by a robot that

CMV® made the project and manufacturing.




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