Хонинговальные головки

Coolant must be delivered from the pump via the piping, valves, and nozzle at the required pressure to match wheel velocity and in a laminar flow. Any turbulence or entrained air will create dispersion TABLE 16.4 Metric Flowrate Chart for a Nozzle with a Coefficient of Discharge of 0.95 Flowrate (1/min) for Listed Nozzle Diameters […]

Since the mid-1980s, the Institute for Machine Tools and Factory Management of the Technical University Berlin worked on an analytical description of the relative motions in cycloidal restricted guidance on lapping machines. A model was developed that calculates the profile wear of the lapping wheel as a function of the path curves of the workpieces […]

In the basic internal grinding process, the wheel is fed perpendicularly into the part usually accompanied by a short-stroke high oscillation along the axis of the wheel. The part is rotated in the opposite direction to the wheel (down grind) in virtually all applications except occasionally in finish grinding with large interrupted cuts if roundness […]

A machining process is an interaction of geometric, kinematic and dynamic, physical, chemical, and tribological phenomena. It is not necessary to fully understand all these interactions to achieve a satisfactory process, but it is necessary to be aware of the factors that can influence the outcome and seek to determine best practice for each part […]

The main route to increasing removal involves increasing the number of abrasive grains that remove material within the grinding period. The number of active grits can be increased by: • Increased grinding wheel diameter • Increased grinding wheel width • Increased grinding wheel speed A larger number of active grits means more material can be […]

This discussion deals only with the case of plunge feed, although the analysis has significance also for through-feed. Figure 19.34 defines position on the workpiece. A line of origin OX can be considered to rotate with the workpiece. Positions on the workpiece surface are defined by the angle from the line of origin. The position […]

The modern practice in precision grinding particularly when using superabrasive grinding wheels is to employ a motorized rotary dressing tool. The tool usually consists of a diamond-faced disc with a narrow cutting edge. A rotary disc is far more durable than a single-point diamond and a precision disc allows excellent rotational accuracy for precision dressing. […]

Adhesion wear is based on an atomic bond at a microcontact surface between the active partners of the wear process through microwelding. This bond is very strong, which means that shearing through the relative movement of the active parts takes place at a different place than that of the original microcontact surface. Chemical adhesion is […]

At present, the most common type of cooling lubricant nozzle is the free jet nozzle aimed at flooding the entire contact zone. Being rather simple in design, this nozzle type is oriented in the tangential direction to the grinding wheel. In addition, the nozzle outlet should be positioned very close to contact zone. By varying […]

All the mentioned restrictions of contacting sensor systems on the workpiece surface gave a significant push to develop noncontact sensors. As for grinding wheels again, optical systems seem to have a high potential. In Figure 11.22, different optical systems as well as two other noncontacting sensor principles are introduced. A laser-scanner is shown as a […]