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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.

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.

CNC technology is slowly finding its way into the manufacturing mainstream. Though the manufacturer often lacks the capital to invest in technically advanced equipment; there is a less expensive route to achieving this critical competitive edge. ...Rebuilding and retrofitting existing machine tools with the latest in CNC parts and accessories can reduce the burden of capital asset investment by 40% or more. The aerospace industry has been retrofitting riveters with the most innovative technological advancements in CNC controls and instrumentation to date. ...The aerospace industry has been retrofitting riveters with the most innovative technological advancements in CNC controls and instrumentation to date. Innovations in wing riveting have improved overall process simplicity, operability and part quality.

On CNC Machines, drilling holes under perfect condition is possible. For drilling holes into titanium, composite and aluminum stacked materials the specific cutting condition can be selected. ...When drilling holes in the final assembly, CNC machine tools cannot be employed due to sizes and accessibility. Power Feed Units or Automated Drill Units ADUs are very handy, flexible and depending upon the jig extremely rigid. ...In the mind-set of the fourth industrial revolution, this article presents a completely new approach in the ADU Technology, while the benefits in the capability of CNC machine tools are now available on ADUs likewise. The benefits of using individual cutting condition for every layer in composite/metal stacked material, the worldwide online-process and -data monitoring, the improved tool-management and traceability, the remote diagnostic and improved cutting tool development functions will show a variety of extremely useful and new features.

What they need is equipment that can accurately reproduce, in large quantities, their desired shapes at speeds that keep the manufacturing cost at an acceptable level. A new CNC shape-turning system has demonstrated a solution that's ideally suited for turning piston skirts and other non-round parts. ...It's a self-contained package that mounts on suitable, standard CNC lathes.

It provides full CNC control, quick reconfiguration of hole patterns, fast drilling of up to 3000 holes in one 8-hour shift, drills both titanium and aluminum and works inside the fuselage.

Many of the large CNC controlled riveting systems that were purchased in the late 1970s and 1980s are beginning to show signs of dated technology.

Although the performance of CNC machines is accurate, unavoidable human errors at the part loading position have serious repercussions on engine performance. ...This new algorithm can also be applied in the design of 2-link 6-DOF robotics manipulator or in CNC machining for contour generation on parts with part loading errors, or in orthopedic operations employing robotic manipulators to assist surgeons.

Machining and turning centers take center stage Makers of CNC machining equipment are incorporating more and better functionality into their products so users cope better with processing challenges such as those posed by tough new grades of aerospace materials.

Modern automotive quality control has been made possible by the recent advances in computer controlled product design, CAD/CAM surface data generation, and CNC master model/tooling cuts. Parallel to that new technology emerging, “space-age” materials have resulted in a new type of tool which guarantee absolute adherence to design intent surface quality.

This equipment is considered new technology for it's combination of features which include: CNC positioning, sealant installation, drilling of multiple hole diameters in a single cycle, domenut installation, as well as the capability of varying hole spacing for alternate domenut needs.

To realize autonomous CNC machining, accumulation and representation of such know-how in a reusable way is needed. In this paper, an autonomous machining process analyzer for hole machining is studied.

A feasibility verification of the system is conducted on an actual CNC machining center. It is found that the new control method could improve the motion trajectory accuracy of the axes greatly.

This method of assembly (prior to automatic fastening) uses a new generation, accurate CNC machine tool in conjunction with reconfigurable part fixturing techniques and specialized end-of-arm tools (end effectors).

Use of today’s advance 3-Dimensional CAD systems coupled with the high accuracy of CNC machines enables the success of the determinate assembly approach for aircraft tooling. This approach provides the aircraft manufacturer significant lead-time reductions while at the same time it supports enhanced system flexibility.

TOPASE today has a series of identical C.N.C. machines each capable of complete panel assembly in one operation. This includes installation of rivets, double headed slug rivets and two piece fasteners.

Common gantries are CNC machines with three translational joints XYZ (3DOF) and usually with an attached wrist (+3DOF). ...In this paper a full kinematic model for a 6DOF general CNC (gantry) machine is presented, along with the Jacobian matrix and singularity analysis. Using Denavit-Hartenberg convention, firstly, the general kinematic structure is presented, in order to assign frames at each link.

Machinability was determined using a CNC turning center with titanium nitride coated cutting inserts. Several heats from different steel suppliers were tested, some contained the machining enhancers calcium and tellurium as well as various sulphur levels.