Search Results

Fasteners are currently being fed into automated installation machines by a variety of different devices. Once fed, the fastener often travels to the machine's installation point via a track or feed tube. Some tracks and tubes keep the fastener oriented while others allow the fastener to tumble and reorient it at the machine head. Fastener escapements, shuttles, tracks, blow tubes and injectors are all part of the overall system. Fastener grip length selection and fastener inspection devices add to the overall complexity of feeding systems. The technical paper discusses the theory and operation of each of the fastener feeding devices including; hoppers, magazines, cassettes and vibratory bowls. Support systems are covered and methods to optimize fastener feed times are presented.

A small, lightweight end effector drill and rivet machine has been developed. The system is capable of installing fasteners in areas that have previously been inaccessible to automatic fastening machines. The unique lower ram system is so small that it can reach through access openings to drill and install fasteners. The system incorporates sensors, a fiber-optic camera system and electronic measurement devices to provide statistical process control data (SPC) for the installed fasteners. An automatic fastener feeding system provides the correct diameter and grip length fastener to the machine. Fastener information is either stored in the part program or is determined by the machine measurement system. The mechanical functions of the system, the machine controls, and the communications between the automatic drill and rivet end effector and the robotic system are discussed. The fully automatic system is mounted on a Jomach 16 Robot.

Rapid Prototyping is a group of advanced technologies for converting designs from computer representations directly into solid objects without human intervention. These technologies are generally referred to as computer automated fabrication. The first rapid prototyping process was developed in the late 1980’s and since that time several other competing processes have been developed. Each process is unique and has benefits above other processes. As a potential user of these technologies, it is important to understand each process and realize the advantages and limitations that each may provide. This technical paper will present each of these technologies and discuss how they operate and their appropriate applications. The reader will gain exposure to the rapid prototyping technologies currently on the market as well as an understanding of the fundamental principles involved in rapid prototyping.