BE511178A

BE511178A -

Info

Publication number: BE511178A
Authority: BE
Priority date: 1951-05-05
Also published as: CH303722A; FR1060028A

Description

       

  PROCEDE ET OUTIL DE FABRICATION D&#65533;UNE DENTURE, CANNELURE OU CRANTUREDIFFERENTIELLE, NOTAMMENT DANS LES CYLINDRES CANNELES DE METIERS-DE

FILATURE. 

  
La présente invention concerne la fabrication sans enlèvement de

  
 <EMI ID=1.1> 

  
les cylindres cannelés de métiers de filature. Elle s'étend aussi aux outils servant à cette fabrication.

  
Les cylindres cannelés à cannelures à division différentielle pour métiers à filer ont été fabriqués jusqu'à présent avec enlèvement de copeaux, par fraisage, rabotage ou.alésage, ou bien sans enlèvement de co-  peaux par emboutissage- ou étirage. Ces procédés sont compliqués, ils prennent beaucoup de temps.et nécessitent surtout des outils très coûteux. Les tentatives de fabriquer des cylindres cannelés par le procédé plus simple

  
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différentielle des entredents avec largeur constante du pied des dents qu' également dans celui de la division différentielle des dents avec écartement constant des entredents, les cylindres cannelés deviennent.non ronds. Dans le premier cas, une dent. basse ,succède toujours à un étroit entredent,

  
et une dent haute à un large entredent, tandis que dans le second cas la

  
dent à petit pied est plus haute que la dent-à large pied. Pour remédier à ces inconvénients et rendre possible la fabrication sans enlèvement de copeaux de pièces dentées, cannelées ou crantées de façon différentielle, conformément à l'invention on procède à une différentiation par paires des entredents et dents de la denture, cannelure ou cranture. On obtient ainsi impérativement une répartition correcte de la matière avec des pièces exactement rondes. Les outils nécessaires à la fabrication de pièces d'ouvrage conformées de cette manière (cylindres ou matrices d'emboutissage) doivent alors recevoir d'une manière rationnelle la même différentiation par paires des entredents et dents.

  
L'invention est illustrée, à titre d'exemple, au dessin annexé.



  METHOD AND TOOL FOR MANUFACTURING A DIFFERENTIAL TEETH, RIBBON OR NOTCH, IN PARTICULAR IN PROFESSIONAL CANNEL CYLINDERS

SPINNING.

  
The present invention relates to the manufacture without removal of

  
 <EMI ID = 1.1>

  
the fluted cylinders of spinning looms. It also extends to the tools used in this manufacture.

  
Differentially divided spline fluted rolls for spinning machines have heretofore been manufactured with chip removal, by milling, planing or boring, or without removal of chips by stamping or drawing. These processes are complicated, they take a lot of time and above all require very expensive tools. Attempts to manufacture fluted cylinders by the simpler process

  
 <EMI ID = 2.1>

  
differential of the entredents with constant width of the root of the teeth that also in that of the differential division of the teeth with constant spacing of the entredents, the splined cylinders become.non-round. In the first case, a tooth. low, always follows a narrow entredent,

  
and a high tooth with a wide entredent, while in the second case the

  
tooth with small foot is higher than the tooth with broad foot. To remedy these drawbacks and make possible the manufacture without chip removal of toothed, splined or differentially toothed parts, in accordance with the invention, a pair differentiation of the entredents and teeth of the toothing, spline or notch is carried out. This imperatively achieves a correct distribution of the material with exactly round parts. The tools necessary for the manufacture of workpieces shaped in this way (cylinders or stamping dies) must then receive in a rational manner the same differentiation by pairs of the entredents and teeth.

  
The invention is illustrated, by way of example, in the accompanying drawing.

Claims

Fig. 1 is a schematic perspective view of a section of a cylinder with differential division according to the invention.

Fig. 2 is a schematic development of a divi- <EMI ID = 3.1>

Fig. 3 is a similar view for a large tooth and the related entree.

The cylinder, for example a splined cylinder as used in

2 and 3. The teeth and entredents located between those shown, the width of which increases progressively, as can be seen in FIG. 1, are not shown for clarity of the developments according to FIGS.

As a result of this uniform distribution of volumes, exactly round parts can be produced by the cold rolling process or also by the stamping process, when the tools receive a differential division similar to that of the part. Determining how the pairwise differential dividing teeth should be distributed around the periphery so that they rise the desired distance is just a matter of math. The number of teeth and the order of magnitude of the differentiation depend on the part diameter and the division. chosen.

Consequently, the tools used for the manufacture of parts with toothing,.! Or differential toothing must be rationally manufactured taking into account the manufacturing requirements, such as strength and hardness.

The invention is of course not limited to the manufacture of fluted rolls of spinning machines, but it can also be used for the manufacture of other parts in which differential division is desired on the periphery.

CLAIMS.

1 - Method of shaping without removal of toothing, spline or differential toothing chips, in particular for fluted rolls of spinning machines, characterized by the differentiation by pairs of recesses (2, 4, 22) and projections (1, 3, 21) of the toothing, spline, notch or the like.

2 - Tool for the manufacture of teeth, splines or notches, with differential division comprising a differential division by pairs of recesses and projections according to claim 1.