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BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI
Publicat de
Universitatea Tehnică „Gheorghe Asachi” din Iaşi
Tomul LVI (LX), Fasc. 2, 2010
Secţia
CONSTRUCŢII DE MAŞINI
COMPUTERIZED MEASUREMENT SYSTEM
BY
CĂTĂLIN UNGUREANU 1 , RADU IBĂNESCU 2
and IRINA COZMÎNCĂ 1
Abstract. All technological machining systems parts made real surfaces
certain deviations from the theoretical and nominal areas. The role of quality
control is to decide whether or not these deviations fall within the allowable
accuracy classes that imposed parts. The paper presents a computerized system for
determining and recording deviations in shape of the real parts
Key words: measurements, inductive transducers, data acquisition.
1. Introduction
Accuracy is the degree of form areas of agreement between actual shape of
the areas resulting from the processing and documentation of performance
prescribed form. The causes of form deviations are multiple of which can be
mentioned:
• elastic deformation of pieces during processing;
• tighten the fixing the wrong parts in devices;
• failure of machine tools guidance;
• wear or deformation of system machine-tool - cutting tools elements.
The effects of shape irregularities are of the least desired, with negative
implications for economic and technical performance of pieces processed:
• edit the sliding friction between the parts of joints,
• reduce static and dynamic tightness of parts and joints,
• edit character fits,
• they increase wear and may lead to locking parts in contact
• decrease the durability of parts in contact.