BE541282A

BE541282A -

Info

Publication number: BE541282A
Authority: BE

Description

       

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 EMI1.1 
 

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   FONCTIONNEMENT : Lorsque les deux bagues-calibres (dont les D et d sont exactement connus) sont en contact avec la pièce; connaissant e de la bague calibre de D ; il suffit de mesurer la distance minimum qui sépare les deux bagues et de l'ajouter à e pour obtenir L de la formule. 



   CONDITIONS INFLUENCANT LE RESULTAT 
1/ Similitude constante d'axe des pointes et des bagues-calibres 
2/ Précision des alésages des bagues 
Précision de l'épaisseur des bagues 
Précision de la mesure de l'entre-deux-bagues 
3/ Parallélisme et fini des faces des bagues et perpendicularité de celles-ci par rapport à l'axe des bagues. 



  N.B. - On n'altère pas le fini ni le tranchant de la pièce malgré la dureté des bagues calibres (traitées) car celles-ci sont d'ajustement glissant.par rapport à l'alésage des bagues- guides. Ceci parce que la bague cesse de progresser lors- qu'elle est en contact avec la pièce malgré le mouvement de la bague soit prolongé plus avant dans le support. 



    MATIERES   EMPLOYEES : 
Acier pour toutes les pièces mis à part le socle en fc 
Les bagues-calibres et les pointes sont en acier trempé rectifié. 



  EXEMPLE   @   
 EMI2.1 
 D=44 d D 40 e = 35 , 67 t longueur de 1 entre jam tna<totf Qtg = 2 x 6i + 3 [ " , 51 . 10 7t



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 EMI1.1
 

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   OPERATION: When the two gauge rings (of which D and d are exactly known) are in contact with the part; knowing th of the ring caliber of D; it suffices to measure the minimum distance which separates the two rings and to add it to e to obtain L of the formula.



   CONDITIONS INFLUENCING THE RESULT
1 / Constant axis similarity of points and gauge rings
2 / Precision of ring bores
Accuracy of ring thickness
Accuracy of the between-two-ring measurement
3 / Parallelism and finish of the faces of the rings and perpendicularity of these with respect to the axis of the rings.



  N.B. - The finish or the cutting edge of the part is not altered despite the hardness of the gauge rings (treated) because they have a sliding adjustment with respect to the bore of the guide rings. This is because the ring stops advancing when it is in contact with the workpiece despite the movement of the ring being extended further into the support.



    MATERIALS USED:
Steel for all parts except the fc base
The gauge rings and tips are made of rectified hardened steel.



  EXAMPLE @
 EMI2.1
 D = 44 d D 40 e = 35, 67 t length of 1 between jam tna <totf Qtg = 2 x 6i + 3 [", 51. 10 7t

Claims

ABSTRACT : Measurement of smooth cones or sizes by cylindrical gauge rings.

The cone to be measured is placed between points.

The cylindrical gauge rings are guided symmetrically to the axis of the part thanks to the supports and the thread of the supports and support rings. ' The rings do not "weigh" on the cone but are simply in contact thanks to their sliding adjustment in the guide rings.

The method informs the angle at all times while others limit themselves to giving the shape of the error and not its measurement (angle too acute), (angle too obtuse) (or correct angle) - - By this process, we therefore eliminate all trial and error.

It allows the measurement of smooth ends like that of cut cones, which is more rarely encountered and new efficiency is the measurement of the angle of cones cut helically and with an uneven number of teeth.

The tip and guide ring brackets slide on the plinth and are fixable to it and are made of steel while the plinth itself is cast iron. The fixing bolts slide in grooves in this base.