Posted by mechlook info on November 2nd, 2011 12:00 AM | 37 Comments Composite Method of Gear Checking. Composite testing of gears consists in measuring the variation in centre distance when a gear is rolled in tight mesh (double flank contact) with a specified or master gear. In composite gear checking two types ...
Posted by mechlook info on October 31st, 2011 11:58 PM | 57 Comments Measurement of Individual elements
Measurement of tooth thickness. The permissible error or the tolerance on thickness of tooth is the variation of actual thickness of tooth from its theoretical value. The tooth thickness is generally measured at pitch circle and is ...
Posted by mechlook info on October 31st, 2011 11:58 PM | 6 Comments Rolling Tests. This is the most commonly used test under production conditions. This consumes much less time and gives quite accurate results. In rolling test, the gear to be tested is actually compared with a hardened and ground master gear. ...
Posted by mechlook info on October 31st, 2011 11:58 PM | 27 Comments Gear Measurement
For proper inspection of gear, it is essential to pay attention to the raw material, each process in the production cycle, machining the blanks, heat treatment, the cutting and surface finish of the teeth.
The gear blank should be tested ...
Posted by mechlook info on October 31st, 2011 11:58 PM | 34 Comments Sources of Errors in Manufacturing Gears
The gears (gear teeth) are generally made by one of the following two methods :
(i) Reproducing method, in which the cutting tool is formed involve cutter, which forms the gear teeth profiles by reproducing the ...
Posted by mechlook info on October 31st, 2011 11:58 PM | 56 Comments Terminology of Gear Tooth
A gear tooth is formed by portions of a pair of opposed involutes. Most of the terms used in connection with gear teeth are explained in Fig. 15'2.
Base Circle. It is the circle from which involute form ...
Posted by mechlook info on October 31st, 2011 01:14 AM | 27 Comments Involute Curve
An involute curve is defined as the locus of a point on straight line which rolls around a circle without slipping. It could also be defined in another way as the locus of a point on a piece of ...
