Rivet injector system for an automatic riveting machine

Inactive Publication Date: 2009-05-21
ELECTROIMPACT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0004]Accordingly, disclosed and claimed herein is a system for transporting rivets, for use in all automatic riveting machine, provided from a feed tube, comprising: a set of rivet fingers mounted on a ram portion of the automatic riveting machine for grasping a rivet; and a rivet injector assembly f

Problems solved by technology

In such a system, however, the rivet is not securely held at all times during injection, and hence there is the possibility of a misalignment of the rivet or a dropped rivet during injection.
Further, different length rivets change the axial position of the rivet relative to the ram, resulting in a variable gap between the rivet and the ram.
This typically requires that the position of the ram be moved, which can be problematic.

Method used

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  • Rivet injector system for an automatic riveting machine
  • Rivet injector system for an automatic riveting machine
  • Rivet injector system for an automatic riveting machine

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Embodiment Construction

[0010]FIG. 1 shows a low-voltage electromagnetic riveting machine (EMR) 10 for moving a rivet 11 (FIG. 2) into a drilled hole in a workpiece, such as an aircraft wing panel structure, and then forming the rivet in the hole by a forward movement of a rivet die 12, mounted on a ram 13. The electromagnetic riveter 10 is one tool in the riveting operation / cycle. It is used with a hole drilling tool arid in some cases with a rivet shaving tool, all arranged on a tool shuttle assembly, to accomplish a complete riveting operation. The electromagnetic riveter 10 shown in FIG. 1 is only one example of a riveting machine used in large-scale riveting operations. The present system is primarily useful with a slug-type rivet, i.e. a rivet with no head, although it could possibly be used with small-headed (index-style) rivets as well.

[0011]The description of the rivet injection system herein follows the movement of a rivet from an infeed tube to a final position in the grasp of a pair of spring-l...

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Abstract

The rivet injector system includes a set of grasping spring-loaded rivet fingers which are mounted on a rivet ram portion of an automatic riveting machine. The rivet injector assembly receives a rivet from a feed tube into a chamber in the assembly. A stopper pin and a moveable forward end stop within the chamber are operated to hold the rivet axially, the rivet being supported on a rivet pad in the chamber. A tower portion of the injector assembly is slidably mounted to raise the rivet, forcing it between the spring-loaded rivet fingers, which firmly grasp the rivet. The forward end stop and the stopper pin are then retracted and the tower portion lowered, leaving the rivet grasped by the rivet fingers, permitting the rivet to be moved forwardly into a hole in the workpiece.

Description

TECHNICAL FIELD [0001]This invention relates generally to automatic riveting machines used in large-scale riveting operations, and more specifically concerns a rivet injector system for moving an incoming rivet from a feed tube to spring-closed fingers on a rivet ram which thereafter insert the rivet into a previously drilled hole in a workpiece, where it is formed by action of the ram.BACKGROUND OF THE INVENTION [0002]Automatic riveting machines are frequently used for large-scale riveting operations such as in the manufacture of aircraft wing panels. In a typical riveting operation, the machine first clamps together the workpiece parts to be joined. A hole is then drilled in the workpiece parts by one tool mounted on a transfer mechanism, such as a tool shuttle. A rivet is transferred / injected to the riveting assembly, which moves the rivet into the hole. A ram portion of the riveting assembly then forms the rivet in the hole. The ram is withdrawn and then another tool on the tool...

Claims

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Application Information

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IPC IPC(8): B21J15/32B21J15/00B21J15/38B65H3/24
CPCB21J15/32
InventorZIEVE, PETER B.BUCHHEIT, CHRISTOPHER
OwnerELECTROIMPACT