GRINDING TAPERS AND ANGLES

GRINDING TAPERS AND ANGLES

Grinding tapers and angles
A conical workpiece with an angle not more than 10° between its axis and its surface face is known as a taper or slow taper.

TAPER OR SLOW TAPER

If the angle is greater than 10°, the workpiece is known as an angle or fast taper.

ANGLE OR FAST TAPER

Tapers
Tapers are usually produced by mounting the workpiece between centres. The procedure is the same as for plain cylindrical grinding. The machine work table is swivelled to give the desired angle between the centres and the wheel spindle. (Follow the general grinding rules.)

GRINDING A TAPER

Angles:
Where the amount of taper to be ground is more than 1 C the work is mounted between centres with the work tab set at zero. The wheel head is swivelled to the desired angle and the workpiece traversed by moving the table and feeding the wheel simultaneously. The feed should always be directed towards the headstock.  (Follow the general grinding rules.)

GRINDING AN ANGLE WITH WHEEL HEAD SWIVELED

The headstock may also be used to hold small workpieces for angle grinding. The headstock is swivelled to the desired angle and the wheel traversed, if required, by longitudinal movement of the work table. This method is used to grind the centres of the universal grinding machine when this becomes necessary.

HEAD STOCK SWIVELED FOR GRINDING ANGLES

Grinding angles with a dressed grinding wheel
Where a wheel of the appropriate face shape is available, an angle may be ground with the axis of the workpiece aligned with the wheel spindle. In some cases it may be economical to dress a wheel to the required angle.(Fig.6) (Follow the general grinding rules.)

Grinding compound tapers
Workpieces having double or compound tapers may be ground with a single machine setting. To do this, one taper must be within the range of the swivel table. The table is set for the small angle and the wheel head is set at a right angle to the longest surface, the wheel is bevelled to suit the steeper taper. One part is ground by traversing the table and the other by moving the wheel head. (Fig 7) (Follow the general grinding rules.)