The economic and environmental cost of friction in machinery and transport is significantly remarkable being the machine tool one of the most affected. In this sector, the movements are fully affected by the friction originated in the displacements between the guideways and the slides, which results in terms of precision, energy consumption and component deterioration. In this line, texturing has proved to be a useful tool to lessen friction. Nowadays, flaking is the technique in use for the texturing of machine tool guideways, a manual and costly process in which the final finish of the workpiece is not controllable. Other techniques like laser texturing constitute an effective and precise procedure which is at the same time and cost expensive, requires fine tuning of process parameters and is not applicable in large workpieces.Therefore, the main challenge is to develop an industry implemented technique capable of producing textures in a repetitive and economically viable way. In this work, a method that allows generating a wide range of controlled textures by grinding with wheels textured with an assisted dressing device, is presented. With this technique it is possible to create textures in large workpieces, such as machine tool guideways and to do it in a repetitive way and in the same machine in which the guide has been ground previously, which involves a reduction in time and costs. The technique has been validated by means of tribological tests in which textures generated with this technique have obtained lower friction coefficients than flaking.

Grinding process is a very important process in machining industry being one of the most popular processes when high quality parts must be manufacture. Likewise, workholding is a critical issue on cylindrical grinding. The use of the driving dog is common when the workpiece is held between centers. However, one of the handicaps of this workholding is that the cylindrical workpiece cannot be ground along the complete length. In order to tackle this issue, in the present work the workpiece is held between centers avoiding the use of the driving dog. To this end, a methodology to obtain the grinding limit parameters that ensure that the transmitted torque is higher that the resistance torque is presented, being the aim of these tests is to avoid the sliding between the point and the workpiece. Finally, non-destructive tests are designed, which, using a safety coefficient of about 0.77, the tests allow the correct design of each specific grinding process. Keywords: cylindrical grinding, workholding, driving dog, sliding

The economic and environmental cost of friction in machinery and transport is significantly remarkable being the machine tool one of the most affected. In this sector, the movements are totally affected by the friction originated in the displacements between the guideways and the carriages, which results in terms of precision, energy consumption and component wear. In this line, texturing has proved to be a useful tool to reduce friction. Texturing techniques include frosting and scraping, both manual and costly processes in which the final finish of the workpiece depends on the operator. Other techniques such as laser texturing represent an effective and precise procedure which is at the same time expensive and not applicable in large workpieces. One of the main challenges is to develop techniques capable of producing these textures in a repetitive and economically viable way. In this work, a new assisted dressing technique that allows generating different textures by grinding, controlling the geometry and distribution of these, is presented. This technique allows to create textures in large workpieces, such as the guides of the machine tools and to do it in a repetitive way and in the same machine in which the guide has been ground previously, which entails a reduction in time and costs. This technique has been validated through tribological tests obtaining lower friction coefficients than with manual techniques. Keywords: Friction, grinding, texturing, dimples, machine-tool, guideways.