The product price consists from several items. Time needed for adequate control of product is one of the most significant items, which can get expensive. So it is important, how the measurement strategy (measurement plan) is prepared. Time, which is not used for control of products by 3D measurement machine, is financial loss for company. This article deals with simulation of contact measurement, as a progressive tool, for preparation and creation of measurement plans for 3D coordinate measurement machines. Furthermore, the article deals with factors, that are not taken into account by offline programming during creation of measurement plan. Those can ultimately lead to significant difference between measurement simulation and measurement performed in workspace of measurement machines or CNC machines. This difference can cause serious shortcomings in measurement plans created in offline programming modules.

Increased emphasis on productivity and machining quality is the cause of constantly looking for progressive chip machining technologies to meet this requirement. One of this option is the use of specific turning with an actively driven tool. This unconventional turning method makes it possible to select higher feed values while keep the required tool life. However, it is important to identify the properties and all possible applications of such an actively driven tool during the machining process. The paper focuses on the resulting state of the machined surface of the workpiece in terms of surface roughness parameters due to the feed values. For the sake of clarity, the knowledge and findings of active rotation machining are compared to self-propelled rotary turning.

Technological conditions of tube drawing influence the properties of the resulting products. In addition to mechanical properties, they also affect the geometry of the drawing tube -macro geometry and microgeometry. The paper presents the results of measurements of macro geometry (roundness and cylindricity) and micro geometry (surface roughness) of the outer surface of the drawn tube. Tubes (STN 41 1353) were drawn through dies with different reduction angles (6° and 12°). On used fixed mandrels were ground the straight and spiral grooves. The effect of these grooves and hence the deformation itself has also been manifested on the outer surface of the drawn tube. On the measured roundness profiles are significantly noticeable places where the land and the groove were when drawing. This effect can also be observed on the deteriorated measured values of roundness. On the measured values and roughness profiles of the outer surface of the drawn tube can also be observed the difference between land and grove.

The manufacture of tubes by a fixed mandrel drawing is one of the technologies in the manufacture of seamless tubes. This is the oldest tube drawing method. It uses a mandrel at the end of the die to shape the internal diameter of the tube. This process is slow and the area reductions are limited (lengths of tubes are limited), but it gives the best inner surface finish of any of the processes. The use of a fixed mandrel by the drawing of small-diameter tubes makes it possible to increase the accuracy of the inner surface and improve the quality. The paper presents the results of solving a partial task in this area. It deals with the reconstruction of the microgeometry of the inner surface of a tube drawn by a fixed mandrel. Tubes (STN 41 1353) were drawn through dies with different reduction angles. There were grounds the straight and spiral grooves on used fixed mandrels. On the inner surface of the tube were formed grooves after drawn that had a different surface roughness compared to the mandrel surface. The paper graphically presents the morphology of obtained surfaces under various conditions (reduction angles, straight/spiral grooves on the fixed mandrel) as well as measured surface roughness values. At the end of the paper, the knowledge gained through experimental research are summarized.

In practice, pipe products are often produced. The surfaces of these components are often turned. The three-jaw chuck is often used to clamp the components for turning. It is a universal clamping fixture. The main advantage of three-jaw chuck is its high flexibility. However, its disadvantage is the inappropriate influence of the clamping forces on the geometrical accuracy of the produced components. This article deals with research of the influence of clamping forces on the roundness of turned pipes. A universal three-jaw chuck was used. The chuck was tightened using a torque wrench. The applied tighten torques were determined by monitoring the commonly used torques for a manually tightened chuck. The article presents the results of experimental research.