Cell Impact has developed durable impact units that efficiently harness our technology’s qualitative advantages at a high rate of production. The machinery, as well as applications predominantly for stamping and compaction, are patented. Our technology leverages the fact that extremely high pressure impacts or impulses generate heat energy that does not have time to be conducted away to the workpiece or the tool. The process takes just a split second and is generally known as adiabatic softening.
Cell Impact’s high-velocity impact units can generate impacts of up to 15 m/s (meters/second). This comes with a high level of repeatability and precision, allowing the process to be repeated year after year without any changes in impact energy or process dynamics.
Cell Impact’s technology is basically a hydraulic piston that can be dramatically accelerated to high velocity in a very short distance. It’s like pushing a nail into a board as opposed to using a hammer. The latter is more convenient and effective, just like our impact unit, and unlike a conventional mechanical or hydraulic press.
The size of the machine and type of tool housing and tool configuration are selected on the basis of the application. The configuration is largely based on proven technology to ensure quality and to make it easier for the aftermarket. The objective is to minimize life-cycle costs.
Once the piston has made contact with the tool, it retracts to its original position and is then ready to make the next impact with precision repeatability. The cycle time – meaning the time from a cycle being initiated to an impact unit being ready for the next cycle – generally ranges from 100 to 300 milliseconds.
The piston is shown at the top of each picture and the tool components are at the bottom.
Cell Impact is the patent owner of a cutting edge machine technology that can be used to shape and shear material by using high kinetic energy. The energy is transferred into the material by an impact generating an extreme pressure within a fraction of a second, providing new opportunities in terms of e.g. improved quality for a wide area of applications.
The Cell Impact High Velocity Impact Technology is capable of producing impacts up to 15 m/s, letting users also gain access to the potentials of the adiabatic phenomenon.
The main challenge with this is not to obtain the correct velocity, that is possible with various technologies, but to do it efficiently and to be able to repeat the process 20,000,000 times per year without any re-bounces or change in energy.
At the same time we use fairly traditional base technologies that are proven and known in the manufacturing community, this to facilitate the use and service. The ambition with this is not only to increase quality and give new opportunities, but also to keep low life cycle cost.
The Cell Impact machine technology is basically a hydraulic piston that can be accelerated to high speed in a very short distance. The use of this hydraulic piston is limited by physics, tool house and tool design, but today we are mostly referring to embossing, cutoff, blanking, piercing and compacting, since this is our first priority.
When the piston has hit the tool, the piston is brought back to its exact original position and is ready for another impact. The complete impact cycle time, i.e. from original position, acceleration down, impact and back up into ready position, depends on size of piston and impact length, but generally it is accomplished in 100 to 300 milliseconds.
Although adiabatic softening has been around since the 1940s (and perhaps even earlier), it wasn’t until the 1960s and 70s that multiple companies and organizations began researching the field.
The kinetic energy generated, which was achieved by the high piston velocity, results in a temperature concentration in a small and confined zone. The greater the impact energy, the higher the temperature. It can reach 800 °C in a very limited area. An example of high temperatures being involved is illustrated in the image below in which the bearing steel rod has separated a few millimeters and is subsequently “welded” in place in a new offset position.
This results in impacts or impulses being able to generate qualitative incisions, patterns or compacted materials with extreme force in a fraction of a second, since there is no time for heat energy to be conducted away to the tool or workpiece. High-velocity impacts in excess of 10 m/s are generally called adiabatic softening, and allow solid metal to be cut, blanked, pierced, embossed or compacted, and all at a level of quality superior to that of conventional methods.
This process is conducted cold, meaning that the bent sheet or cut rod is cold before and after it has been formed or cut.
(Cell Impact´s expertise is in the High Velocity Impact technology and not in the theory of the adiabatic phenomenon, therefore the above is only a short introduction and according to our understanding)