zielsicher Englisch, Metalltechnik, Schulbuch

Read the following text then translate the underlined, very important terms below. For help you may use your Metal Technology script. Machine components have to be mounted and exchanged, without any reworking, regardless of the manufacturer. Therefore, the deviation of their dimensions has to be limited. Tolerances deter- mine the permissible deviation from the nominal size. Tolerance is the difference between the maximum size limit and the minimum size limit of a component. Therefore, because of financial and economic reasons, the tolerances have to be as high as possible, but as precise as possible. nominal size maximum size limit minimum size limit Nennmaß Höchstmaß Mindestmaß Work with a partner and ask him/her about the meaning of the term “tolerance”. Close your books (or do not peek too much into it). Why does the deviation of the dimensions of components have to be limited? Why do tolerances have to be as high as possible but as precise as possible? What are the reasons? Take notes. Take turns. Machine components have to be mounted and exchanged, without any reworking, regardless of the manufacturer. Because of financial and economic reasons, the tolerances have to be as high as possible, but as precise as possible. Match the different tolerances from the box with the phrases below. tolerance of position  form tolerance  dimensional tolerance dimensional tolerance form tolerance tolerance of position deviation limits general tolerances ISO tolerances states how far an actual surface is permitted to vary from the desired geometric form refers to a reference element or a reference axis 01 A2 Word bank 01 component Baustein limited begrenzt permissible erlaubt deviation Abweichung 03 deviation limits Grenzabmaß 02 A2 03 A2 Tolerances and fits Simon’s supervisor makes him check a work piece again to make sure that the tolerance is okay. Simon is really annoyed, he doesn’t like doing this and he doesn’t understand why this is so important for his supervisor. Does this sound familiar to you? Is your supervisor like this, too? However, do you know why this is important? 120 Unit 23 Nur zu Prüfzwecken – Eigentum des Verlags öbv