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To move this process into the world referred to as CNC, many traditional concepts need challenged. The manufacturing engineering environment must take the position that riveting can be a machine tool process capable of utilizing the latest in CNC technology. ...The manufacturing engineering environment must take the position that riveting can be a machine tool process capable of utilizing the latest in CNC technology. The ability to assemble components with a wide range of tolerances via the accuracy of computers is a reality if proper concepts are employed.

The use of CNC automatic fastening on large aircraft structures requires a process-oriented approach. Included in that process are factors related to the parts and assemblies, tooling, machine control data, as well as the automated fastening machine itself. ...This paper summarizes some challenges and solutions that occurred during the production implementation of such a CNC assembly process for very large aircraft structures.

The CNC controlled automatic riveting work cell represents the latest State-Of-The-Art in automatic fastening machines and support hardware. ...The knee style machine was developed for fabricating tubular assemblies which are fed into the throat of the machine over an eight inch square lower knee. A CNC controlled four axis positioning system presents the part to the machine for riveting. Support systems include an automatic fastener feed system and a vacuum chip collection system. ...The work cell is controlled by an Allen Bradley series 9/290 enhanced CNC processor. The paper presents each individual system and it's role as part of the total CNC duct riveting work cell.

The multiple axis flexible CNC riveting cell consists of three major systems: a multi-axis part positioner, a multiple head drill and rivet machine and a multi-bowl rivet feed system. ...The multiple axis flexible CNC riveting cell consists of three major systems: a multi-axis part positioner, a multiple head drill and rivet machine and a multi-bowl rivet feed system. The CNC positioner has six axis of control; the five common axis of X, Y, Z, Alpha, and Beta plus tool position on the lower ram.

The multiple axis flexible CNC riveting cell consists of three major systems: a multi-axis part positioner, a multiple head drill and rivet machine and a multi-bowl rivet feed system. ...The multiple axis flexible CNC riveting cell consists of three major systems: a multi-axis part positioner, a multiple head drill and rivet machine and a multi-bowl rivet feed system. The CNC positioner has seven axis of control; the five common axis of X, Y, Z, Alpha, and Beta plus lower ram position and tool position on the knee style lower ram.

The growing popularity of the new ARP technologies has overshadowed one technology that has been utilized in the mold tooling industry for over 20 years - Computer Numerical Control (CNC) machining. Today, CNC machining is used extensively in the manufacture of permanent mold tooling, such as: mold models/patterns, graphite electrodes for Electronic Discharge Machining (EDM), and direct machining of mold cavities into tool steel. ...In addition, CNC machining can provide several key capabilities not yet available with ARP technologies, namely: tight dimensional accuracy, exceptionally smooth surface finish, high level of aesthetic detail, wide selection of materials, and ability to directly produce functional prototypes without secondary casting processes.

Electroimpact has recently produced a high-speed fuselage panel fastening machine which utilizes an all-electric, CNC-controlled squeeze process for rivet upset and bolt insertion. The machine is designed to fasten skin panels to stringers, shear ties, and other internal fuselage components. A high riveting rate of 15 rivets per minute was achieved on the first-generation E7000 machine. This rate includes drilling, insertion, and upset of headed fuselage rivets. The rivets are inserted by a roller screw-driven upper actuator, with rivet upset performed by a lower actuator driven by a high-load-capacity ball screw. The rivet upset process can be controlled using either position- or load-based feedback. The E7000 machine incorporates a number of systems to increase panel processing speed, improve final product quality, and minimize operator intervention.

This paper highlights the key lessons learnt from the introduction of a CNC auto-fastening machine to an existing wing production line. It outlines some key machine and process lessons, and emphasises the benefits of using a team approach for such a project.

Thermal growth of spindle and other components is common in CNC machines, especially with MQL machining, and directly impacts positioning accuracy and thereby quality. ...Application of this method in 5-axis CNC machines is relatively new and effectiveness is often not tested. Error sources due to various orientations of the part could arise. ...A new artifact based method is presented for assessment of thermal compensation used by the CNC OEM. The method involves an artifact, test cycle and automated data logging. A precision granite artifact with gage bores on different faces is fabricated and can be presented for probing in different orientations.

Accurate positioning and precision of CNC machines are directly affected by performance of their mechanical drive system and control unit (CNC feeddrive system). ...Accurate positioning and precision of CNC machines are directly affected by performance of their mechanical drive system and control unit (CNC feeddrive system). This is more important in contouring operations where axes motion is synchronized by interpolators and errors are accumulative.

Previous work has greatly reduced this error through the use of secondary scales and a mathematical model of the robot deflection running on a CNC controller. Further research improved upon this model by accounting for linear deformation of each robot link regardless of position.

At present there is no other technologies integrating the 3D printing and the CNC machine, thus we adapting a new design of 3D printing setup for CNC machine with some special feature as extruder, it is based on the Fusion Deposition Modelling (FDM) process with the help of the parts like Extruder, Heat Bed, Arduino boards where we are going to design a head of the printer which is to be attached with the BT40 commonly used Tool holder for the CNC milling machines. ...At present there is no other technologies integrating the 3D printing and the CNC machine, thus we adapting a new design of 3D printing setup for CNC machine with some special feature as extruder, it is based on the Fusion Deposition Modelling (FDM) process with the help of the parts like Extruder, Heat Bed, Arduino boards where we are going to design a head of the printer which is to be attached with the BT40 commonly used Tool holder for the CNC milling machines. This extruder plays a vital role in this CNC milling machine for producing 3D printed components of different material and different colour. ...The post processing process like milling and surface finish can also be done by the CNC Machine. This setup is cost effective.

The feeddrive of a CNC machine is a mechatronic system consisting of motor, mechanical transmission devices and worktable. ...In this paper, bond graph based approach has been used to model the feeddrive of a CNC machine. This technique is based on power flow and uses basic component types to develop models for complex multi-physics systems.

New controller and drill spindle designs made it possible to redesign the AFDE as a self-contained unit with on-board CNC, custom operator interface, RF network and more compact drill spindles for increased robustness and versatility.

Very large multi-axis CNC machines offer a special challenge for efficient and accurate machine compensation. Aerospace applications demand tight tolerances, but conventional compensation methods become expensive for large machines.

A piezoelectric tool actuator system is presented for precision turning of turbine shafts on conventional CNC turning centers. The actuator system provides precise motion in the radial direction to accurately set the depth of cut in finish turning.

In summary this is achieved by deploying a Siemens 840D CNC as the singular central controller handling the robot motion control, riveting process and cell safety features.

This present exploration details the investigation CNC turning of AA5052 alloy with conventional Tungsten Carbide (WC) tool inserts under MQL conditions.

The paper formulates basic requirements to the tool-holder/spindle interface for different machining operations. A comparison of some alternative and commercially available designs is presented. Two advanced interface designs which are fully compatible with existing 7/24 taper spindles and toolholders while providing enhanced accuracy in axial and radial directions, higher stiffness, insensitivity to high rpm, and reliability at high rpm are described and results of their evaluation are presented.

This research paper presents the development of an Artificial Neural Network (ANN) model for Computer Numerical Control (CNC) drilling of AA6061 aluminium alloy with a coated textured tool. The primary aim of the study is to optimize the drilling process and enhance the machinability of the material. ...Experimental data obtained from CNC drilling of AA6061 with the coated textured tool is used to train and test the ANN model. The results demonstrate that the ANN model provides accurate predictions of the output performance of the machined hole under different drilling conditions.