Abstract:
A pneumo-hydraulic rivet gun, comprising: a pneumatic motor (1 ), which sets a threaded tie-rod (2) in rightwards or leftwards rotation to engage the tie-rod (2) or disengage the tie-rod (2) from the threaded hole (3A) of a rivet (3); an oleodynamic system (4) for determinig a plastic deformation of a portion of the rivet (3), such as to secure the rivet (3) to a wall (P); a pneumatic booster (5) which activates a plunger (50) that compresses the fluid (F) of the oleodynamic system (4); a pneumatic system (6) provided with an auxiliary valve (60), which is opened by the tie-rod (2) and allows the supply of the rightwards rotating motor (1 ), and with a main valve (61 ), which is opened by a trigger (62) subsequent to the reclosing of the auxiliary valve (60) in order to allow the connection of an air supply conduit (65) to a source of compressed air: a hydro-pneumatic exchange valve (10), connected to the air supply conduit (65), oleodynamic system (4), pneumatic booster (5), the exchange valve (10) allowing, in the following order and subsequent to intervention by the operator on the trigger (62), activation of the pneumatic booster (5), the pressurisation of the oleodynamic system (4) with consequent plastic deformation of the rivet, the activation of the pneumatic motor (1 ) with leftward rotation of the tie-rod (3) which uncouples from the rivet (3) and, following the release of the trigger, a halt of the pneumatic motor.
Abstract:
A fastener placing tool (11) for placing fasteners of the breakstem blind rivet type incorporates a force/stroke monitoring device (22) which comprises an assembly body (24) detachably mounted on the tool between the latter and the anvil (18) , a load-cell sensor (33) carried by the assembly body (24) for sensing the force applied by the hydraulic piston (16) to the jaw assembly 17 with respect to the anvil (18) , and a non- contact stroke- sensor (35) carried by the assembly body (24) for sensing the position of the jaw assembly (17) relative to the anvil (18) . The stroke-sensor (35) operates without physical contact with the jaw assembly (17) or any part of the tool moving therewith. To this end the jaw assembly (17) is connected to the hydraulic piston (16) by means of an adaptor tube (23) which has a conical tapering outer surface. The clearance distance between the sensor (35) and the adjacent part of the conical surface of the adaptor tube 23 varies with the axial position of the adaptor (23) and jaw assembly (17) .
Abstract:
A rivet monitoring system is provided which has a micro-strain (33) or micro fluid pressure (33’) sensor that measures strains or pressures within a tool component (30, 30’). These measured signals are compared to a number of tolerance bands formed about median strain or pressure versus time curve. Various techniques are provided to analyze the measured data with respect to the tolerance bands to determine if a particular river set is acceptable.
Abstract:
A nut-plate riveter (10, 10a) which includes multiple pistons (18, 20, 20a) which assist in creating a pulling force. The nut-plate riveter (10, 10a) provides that spent mandrels (22) are pulled through the tool, thereby avoiding problems in the field. The nut-plate riveter (10, 10a) includes a handle (12) and a plurality of pistons (18, 20, 20a) disposed in the handle (12). Cavities are proximate the pistons for pressurizing the pistons (18, 20, 20a), and air supply passages are in communication with the cavities for supplying air to the cavities to pressurize the pistons (18, 20, 20a). A piston rod (80) is engaged with at least one of the pistons (18), and the piston rod (80) has a longitudinal bore (88) therethrough which is configured to receive a spent mandrel (22). A deflector fitting (34) may be disposed at an end of the nut-plate riveter (10, 10a).
Abstract:
A container (12) for use with a tool (2) for installing fasteners of the type in which a part of the fastener is broken off during installation, the tool (2) having a body, the container (12) being for collectiing broken-off fastener parts during operation of the tool, the container (12) comprising: attachment means (20, 21) for removably attaching the container (12) to the body (8) of the tool, the attachment means (20, 21) being resiliently biased into attachment with the body (8) by resilient biasing means; and one or more contact region (22, 23) for receiving manual pressure from a user, at least one of the said one or more contact regions (22, 23) being coupled to the attachment means (20, 21); wherein the resilient biasing means are such that the attachment means (20, 21) can be detached from the body of the tool by the user applying manual pressure on the said one or more contact regions (22, 23) thereby detaching the container (12) from the body of the tool (2). Also provided is a fastener installation tool (2) having such a container (12).
Abstract:
A rivet setting tool is provided with a quick connect nose housing (18, 18). The quick connect feature allows for quicker easier disassembly and assembly of the nose housing (18, 18) for cleaning and general maintenance.
Abstract:
A rivet setting tool is provided with a quick connect nose housing. The quick connect feature allows for quicker easier disassembly and assembly of the nose housing for cleaning and general maintenance.
Abstract:
A fastener installation tool for installing fasteners of the type in which a part of the fastener is broken off during installation. The tool is provided with a collection means (21) for collecting broken-off fastener parts during operation of the tool, the collection means being removably connectable to the tool. The tool includes retaining means (28) for retaining the collection means (21) against removal from the tool and the retaining means is air-pressure actuated into the retaining condition. The tool may include resiliently urged shutter means (38) which are held open when the collection means (21) is attached.