Apparatus for measuring blank holding force acting on...

G - Physics – 01 – L

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G01L 1/02 (2006.01) B21D 24/02 (2006.01) B21D 24/08 (2006.01) G01L 5/00 (2006.01)

Patent

CA 2093382

An apparatus used for measuring a holding force expected to be applied to a pressure member of a press, before the lower and upper dies and the pressure member are installed on the press. The apparatus includes a measuring member to be placed on cushion pins of the press associated with a fluid-actuated cylinder via a cushion pad. A sensing element is disposed on the measuring member or a main slide carrying the upper die, such that the holding force produced by force applying means which includes the cylinder acts on the sensing element, when the measuring member is lowered with the sensing element by the main slide in its downward movement towards a bolster on which the lower due is fixed. A load detecting device is disposed on the sensing element for detecting the holding force acting on the latter. The apparatus also includes a device for recording the holding force as detected by the load detecting device.

Appareil utilisé pour mesurer la force de retenue qu'il est prévu d'appliquer sur un élément d'une presse de moulage par compression qui applique la pression, avant que les moules inférieur et supérieur et ledit élément ne soient installés sur la presse. L'appareil comporte un dispositif de mesure qui doit être placé sur les tiges d'amortissement de la presse, lequel dispositif est relié à un vérin hydraulique au moyen d'un tampon amortisseur. Un capteur est placé sur le dispositif de mesure ou sur un coulisseau principal supportant le moule supérieur, de sorte que la force de retenue produite par des mécanismes d'application de la force, y compris le vérin, agit sur le capteur, lorsque le dispositif de mesure est descendu avec le capteur par le coulisseau principal dans un mouvement descendant en direction d'un plateau mobile sur lequel le moule inférieur est fixé. Un détecteur de charge est placé sur le capteur pour déterminer la force de retenue qui agit sur ce dernier. L'appareil comporte aussi un dispositif pour enregistrer la force de retenue déterminée par le détecteur de charge.

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