HYDROPNEUMATIC GUN FOR SETTING BLIND-RIVET NUTS

In a hydropneumatic gun for setting blind-rivet nuts used for integrally securing, for example, two panels to each other with a nut, an air piston (4) fitted in an air cylinder (3) is moved to pressurize oil (1) housed in the gun body (2), causing an oil piston (6) to be retracted, so that a screw m...

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Bibliographic Details
Main Authors KAMATA, AKIRA, UMEMURA, YASUO, TSUYUGUCHI, HIROHUMI, KUBO, YOSHIYUKI
Format Patent
LanguageEnglish
Published 13.11.1991
Subjects
FORGE FURNACES
FORGING
HAMMERING
HAND TOOLS
MANIPULATORS
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PORTABLE POWER-DRIVEN TOOLS
PRESSING METAL
PUNCHING METAL
RIVETING
TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING
TRANSPORTING
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Summary:In a hydropneumatic gun for setting blind-rivet nuts used for integrally securing, for example, two panels to each other with a nut, an air piston (4) fitted in an air cylinder (3) is moved to pressurize oil (1) housed in the gun body (2), causing an oil piston (6) to be retracted, so that a screw mandrel (10) attached to the oil piston (6) at its tip is retracted to the inner part of the gun body (2), thereby to exert a deforming force to the sleeve of a nut (71) threadedly mounted on the screw mandrel (10). The hydropneumatic gun further comprises an air motor (13) to be rotated by compressed air, an air motor driving air guide passage (17), an air motor forward/reverse changeover mechanism (32) for switching the rotation direction of the air motor (13), and a power transmission mechanism (44) for transmitting an air motor driving force to the screw mandrel (10). A series of operations of the screw mandrel (10) such as forward rotation, stop of the rotation, retraction, reverse rotation and advancement can thus be carried out smoothly and sequentially.
Bibliography:Application Number: EP19880101191