![]() ![]() In addition to the measurement on line of the speed of chorreado, the continuous supervision and the adjust of all the pertinent parameters of the process, ensure that the value specified of tolerance Almen do not surpass. For this process of chorreado special, the pressesure of chorreado depends on the outlines of the shovels and, therefore, have to adjust individually. ![]() The álabes are chorreados with the filters doing special movements, programmed individually. Once that the three measures of the position of the component have defined exactly, the operario withdraws the measurement instruments of the robots. For this purpose, mounted some special sensors in the inferior part of the table giratoria. To end to attain an absolute precision and avoid collisions, the robots no only have to take the readings of the distance of the support of the piece of work and the real component, but it also has to range. Then the operario mounts the systems of measurement on the two robots and initiates the cycle of work. After having placed the group of blisks in a special support, the operario ranges the setting and blocks them. The components to chorrear consist in different types of groups of blisks with variable quantities of álabes of the turbine and in different positions. The necessary software has developed in collaboration with a company of automation, and, at the same time, the software of control for the robots has been optimised for this sophisticated application of peening. A key factor for the decision of the customer was that the specialists of Rösler could offer a system that allowed a measurement and calibración of the filters of chorro practically automatic. This small distance and the high number of álabes of the blisk, require a precise movement of the filters with a maximum deviation of 1/10 mm (around 0,004 – 0,010 inches).The precision required does that the calibración and manual measurement was very difficult and carry time, especially for the process of the blisk assembled, components that often consist in multiple blisks.Īfter an accurate analysis of all the ones of equipment of the competition, the customer chose the system of granallado totally automatic KU 40 of Rösler. The distance between the filters of chorreado and the álabes is of only some millimetres. For this reason, Rolls Royce Germany developed a new process of shot peening whose main characteristic are that the succión and lateral pressesure of each álabe individual are simultaneously chorreados with filters of special form. However, the shot peening of these components poses some new technological challenges. In addition to saving costs by means of the elimination of the setting of the álabes in the disk, the utilisation of the blisks also reduces considerably the weight. In the elements conventional compressesors for the turbines, the disk of turbine and the álabes are separate components, whereas in the case of the blisks, the álabes and the disk of the turbine are mechanised from an only piece (álabes integrated in the disk) of titanium or alloy of nickel and steel. ![]()
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