different alignment test of drilling machine ppt

(05-08-2016, 11:26 AM)Guest Wrote: different alignment test of drilling machine ppt

1. Flatness of clamping surface of base. (Refer Fig. 6.17).

The test is performed by placing a straight edge on two gauge blocks on the base plate in various positions and the error is noted down by inserting the feeler gauges. This error should not exceed 0.1/1000 mm clamping surface and the surface should be concave only.

2. Flatness of clamping surface of table.

This test is performed in the same manner as test (1), but on the table. The permissible error is also same.

3. Perpendicularity of drill head guide to the base plate.

The squareness (perpendicularity) of drill head guide to the base plate is tested :
(a) in a vertical plane passing through the axes of both spindle and column, and
(b) in a plane at 90° to the plane at (a).
The test is performed by placing the frame level (with graduations from 0.03 to 0.05 mm/m) on guide

4. Perpendicularity of drill head guide with table.

This test is performed exactly in the same way as (b). (Refer Fig. 16.18) and the permissible error is also same.

5. Perpendicularity of spindle sleeve with base plate.

This test is performed in both the planes specified in test (3) and in the similar manner with the difference that the frame levels are to be placed on spindle sleeve and base plate. The error (i.e., the difference between the readings of the two levels) should not exceed 0.25/1000 mm for plane (a) and the sleeve should be inclined toward column only ; and 0.15/1000 mm for plane (b).