Springs are among the most important and common mechanical elements used. When springs are designed, it is important to make certain considerations and procedures in order to select the optimum spring configuration, fixturing system and other assembly features for a specific function. In conventional springs or wire wound springs, these individual features increase time and complexity of assembly. Machined springs have been developed as mean of solution for multi-objective design like reliability, repeatability and integration of multiple components, which results in a significative reduction of complexity of assembly.
On the other hand, machined springs have precise performance as well as additional capabilities and features that are not obtained with conventional springs. The key behind the versatility of machined springs is the capability of integration of special geometries for fixation, the possibility of usage of multiple entry coil geometries and obtention of accurate spring values.
In this work, description of some of the general characteristics of machined springs in terms of material and process selection is made; moreover, certain considerations during the design and manufacturing stages are pointed. A comparative study between a wire spring and machined spring for a specific application is performed as mean of evidence of the advantages of machined springs.