Taper Testing Machine

Application:

for the Determination of the angle and form errors on outside and inside tapers and parts with angular surface and from tests of cylindrical parts.

Design Features:

On the rigid base which factures hardened and precision lapped guide - ways the generously dimension measuring carriage is mounted on dust-proof high precision ball bearing. The wide sine table, provide with T - slots, supports an inclinable mounting table for the accommodation of the various fixtures required for the different taper checks. The sine table can easily be lifted by a convenient releasing lever which in turn facilitates the mounting of the parallel gauge blocks. The measuring head is height adjustable on the extra rigid column by means of a spindle. A swivel support arm is mounted on the sliding head and supports the lever type inductive gauging head to be used in conjunction with either the electronic comparator or the electric recorder. These instruments permit readings and evaluation of the measuring results with maximum accuracy.

Operation Principle:

This Parts are checked at,

          (1) Is mounted on the inclinable mounting table.

          (2) The fixture is obliquely adjustable in reference to the axis of the part under test, thus permitting the perfect alignment of the part. At first at horizontal sine table.

          (3) The upper crest line.

          (4) Of the taper is aligned parallel to the guide-ways of the measuring carriage.

          (5) By inclining the mounting table. parallelism of this crest line is checked by moving the measuring carriage back and forth while simultaneously gauging the crest line. If required, adjustments can be made by means of the adjustment screw.

          (6) until the inductive gauging head

          (7) does not cause a deflection on the indicating instrument. The sine table is then swivelled around the entire taper angle by inserting a gauge block

          (8) which corresponds to the ideal angle α. At this point the taper crest line

          (9) is parallel to the guide ways, provided the taper to be checked corresponds to the ideal value. This parallel alignment is checked by gauging the lower crest line. All taper angle and form errors are read on the indicator.

           By means of the said alignment procedure, all possible influences of mounting inaccuracies are eliminated. Therefore, the mounting surface of the part under test does not require precision machining nor does it require accurate centring in reference to the taper.

Features of taper testing machine:

Max. taper angle	30º
Max. taper length	275mm
Range of taper gauges obtained with appropriate accessories
Morse taper up to Steep taper up to Metric taper up to	MK6 Size 60 Size B 140 / C 140
Guiding accuracy of measuring carriage	0.5µm over 100 mm 1µm over 400 mm
Repeatability of measuring result	0.5µm
Measuring inconsistency	=1µm
Hard granite base plate	1000 x 630 x 150mm
Measuring table   mounting surface                         Distance of sine rollers	110 x 650mm 300mm
Travel of measuring carriage	400mm
Height adjustment of measuring head	375mm
Speeds of measuring carriage	20/5/2mm/s
Speeds of measuring head	10/5/1mm/s
Power supply	220 V, 50-60 Hz, 50W
Air supply	5bar, 1 m3/h

  Taper Testing Machine:

For reference free determination of angle and form errors on outside and inside tapers and parts with angular surface and form test on cylindrical parts.

The taper testing machine consists principle of the following units:

Measuring Carriage:

With wide surfaces and air cushion bearing for exact movement on the base plate and along the high guide edge of the measuring table. With motor-driven, vertically adjustable measuring head on sturdy column Air filter and air regulating valve provide air for the air cushion bearings.

Hard granite Base Plate:

For accurate guiding of the measuring carriage upon an air cushion and for mounting the measuring table. Made of fine grain black granite of great hardness and stability.

Measuring Table:

Consisting of lever operated sine table and inclinable mounting table with T-slot for fixing mounting devices for components to be tested. Self-locking safety device prevents damage of setting gauge block and mounting surface of gauge block at inadvertent slipping of sine table. With integrated switch board for controlling all movement of measuring carriage and measuring head as well as for the selection of testing speeds by push buttons.

 Electronic measuring and recording Equipment:

Consisting of inductive gauging system for contacting both crest lines without turning the stylus, electronic indicating instrument for reading the measuring result and also electrical recorder for evaluation of taper angle errors and taper forum errors.