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Shot Peening

Precision Shot Peening Services in the UK

At MNB Precision Engineers, we can offer precision shot peening services to all of our customers across many different industries. Peening is an engineering method for enhancing the surface of various different materials. It provides a cost-effective and practical way to extend the operational lifespan and performance of the main construction parts.

How Shot Blasting is applied

Shot blasting is an engineering method for enhancing the surface of various materials. The definition of shot peening is to shape a metal sheet by blasting it with a stream of metal shot. The metal pieces can be shot-peened on both sides.

The shot, in shot peening, is known as a spherical material, and each bead hits the surface of the product material. The high impact of the shot creates a simple. Now imagine hundreds of shots fired at the material to create a precision shape or crater. The dimples created are actually making the surface material stronger and more resistant to cracking. Each application of shots is a thought out and specified prior to processing. When the parameters have been established, the depth and size needed then the work can be tested and any repeat work needed.

Shot Peening is a controlled metal surface finishing process; it is the most cost-effective and practical way of creating surface resilience, enhancing performance and extending the life of critical components. It prevents stress corrosion failure.

Cold Hammering

Also known as mechanical pre-stressing or cold hammering the process of shot peening works through the repeated striking of a surface with spheres known as shot. Visually, the procedure is similar to sandblasting and functions as if striking the surface repeatedly with a ball peen hammer. The result of this process is a series of small indentations that create a property known as residual compressive stress, this results in better fatigue and cracking resistance, as well as reduced stress corrosion in metal components.

Shot peening is similar to sandblasting as it is sometimes referred to, however, unlike sandblasting, peening has less dust production. Shot blasting a surface is often used for aircraft repairs as it can relieve tensile stress built up from grinding. The different types of shot beads available are spherical cast steel shot, ceramic bead, glass bead or rounded cut wire these all give different finishes. Peening is commonly used to impart additional material resistance. It can be used for the following applications:

  • Crankshafts
  • Gear wheels
  • Connecting rods
  • Automotive gear parts
  • Coil springs
  • Turbine blade (Aircraft)
  • Airframe components
  • Suspension springs
  • Medical implants

At MNB Precision we use a wide variety of different shot peening machines. Within the precision engineering industry, there are thousands of different machines that can all deliver different results. Here are just a few different shot peening machines that can be used:

  • Rotary index machines
  • Automated rotary machines
  • CNC machine
  • Continuous machine
  • Pressure machine
  • Suction machine
  • Fine steel peening machine

If you have more specific needs, we will work to accommodate. We are continuously working to increase both our capacity and capabilities to meet market demand; as such we can cater to the needs of leaders in the industry.

Why Consider Shot Peening?

Shot peening can help to prevent fatigue cracks, corrosion, deteriorated strength and premature fatigue that can be caused by machining and form metal parts which also creates internal stress concentration. Peening helps to prevent crack formation and growth since typically fatigue cracks generally begin at the imperfection on the surface of the material. The benefits of shot peening are not only limited to being able to prevent structural weakness and cracks. They also extend to facilitating the building of stronger and harder components like gear cogs that have been shot peened after carburizing with a hardness level above Rockwell 60RC that can be used in fatigue and shock applications.

Shot peening also helps to allow existing designs to function at higher stress level and enhances lubricity when used on bearing surfaces and gear teeth. For cosmetic requirements, shot peening is able to produce more uniformly textured surfaces for special coatings and adhesion and also helps to harden mating surfaces preventing galling and fretting. There is a variety of different machines that can be used for different applications and on different parts with different functions depending on the end product and the reason for shot peening.

There are also different types of parts that can be subjected to shot peening. However, gears have always been the main beneficiaries of the process because they typically work under stress most of the time and could benefit from harder properties. It is important to remember that for the best results it is important to match the right material to the right peening machine for the right reasons.

For more information on our Shot Peening Services or any other Precision Engineering Service we provide such as , please don’t hesitate to contact us or call 02476 695959.

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