Abrégé

Improved slide lock apparatus used in bending apparatus to bend stock to an acute angle. A hydraulic cylinder with a ram extendable under hydraulic pressure provides the bending power. The ram automatically retracts a slide from an first outward location when hydraulic pressure is removed to a second inward location for two separate bends to achieve an acute angle bend. This improved slide lock prevents any possible injury to the operator by covering a stop arranged to prevent the slide from moving outward a greater distance then the first outward location.

Classes IPC  ?

• B21D 7/16 - Équipement auxiliaire, p. ex. pour réchauffer ou refroidir les coudes
• B21D 9/16 - Équipement auxiliaire, p. ex. machines pour remplir les tubes avec du sable
• B21D 11/22 - Équipement auxiliaire, p. ex. dispositifs de mise en place du matériau

Abrégé

Repeatable bending angle apparatus incorporated into existing manually or pneumatically operated metal stock bending apparatus permits making a number of successive bends of metal stock having similar characteristics. A disk is rotatably mounted below the bending apparatus bending arm with its center located at the bending arm axis. The disk can be rotated and locked at any bending angle. In a first embodiment, using manual bending power, an upward extension from the disk into the bending arm path provides a stop for successive bends at identical angles. Second and third embodiments use pneumatic power. The second embodiment utilizes a spring loaded insert from the stop to give the operator an indication of where to stop the apparatus at the desired angle before the disk will be rotated by the bending arm bearing against the stop. In the third embodiment the stop mounts a valve with a spring loaded extension which shuts off air to a pneumatic pump which stops the bending arm at the same angle when the bending arm depresses the valve extension for successive bends of equal angles.

Classes IPC  ?

• B21D 11/22 - Équipement auxiliaire, p. ex. dispositifs de mise en place du matériau

Abrégé

Apparatus for bending stock to an acute angle. A hydraulic cylinder with a ram extendable under hydraulic pressure provides the bending power. The ram automatically retracts from an extended position when hydraulic pressure is removed. One end of an apparatus supporting arm consists of a slide bar. The slide bar end of the arm is secured to a support with the opposite end pivotably mounting a forming die and a lever. The lever pivotably mounts a forming roller. The lever carries the forming roller around the die and bend stock secured to the die around the die. A slide is slideably attached to the slide bar. The cylinder and ram are pivotably attached extending between the slide and the lever. With this arrangement providing hydraulic pressure to extend the ram will rotate the lever and forming roller around the die and bend secured stock around the die, then removing pressure will retract the ram and move the slide with the attached cylinder and ram towards the die where the slide is automatically locked in place. This permits making an acute angle bend by successive bends with the cylinder and ram at two different locations with respect to the die.

Classes IPC  ?

• B21D 5/02 - Cintrage des tôles le long de lignes droites, p. ex. pour former un pli simple sur des presses particulières sans fixation de la pièce