Measurement and Testing of Gears-Composite Method of Gear Checking
Posted by mechlook info on November 2nd, 2011 12:00 AM | No Comment
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 ...
Measurement and Testing of Gears-Measurement of Individual elements
Posted by mechlook info on October 31st, 2011 11:58 PM | 1 Comment
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 ...
Measurement and Testing of Gears-Rolling Tests.
Posted by mechlook info on October 31st, 2011 11:58 PM | No Comment
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. ...
Measurement and Testing of Gears-Gear Measurement
Posted by mechlook info on October 31st, 2011 11:58 PM | No Comment
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 ...
Measurement and Testing of Gears-Sources of errors in Manufacturing Gears
Posted by mechlook info on October 31st, 2011 11:58 PM | No Comment
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 ...
Measurement and Testing of Gears-Terminology of Gear Tooth
Posted by mechlook info on October 31st, 2011 11:58 PM | 3 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 ...
Measurement and Testing of Gears-Involute Curve
Posted by mechlook info on October 31st, 2011 01:14 AM | No Comment
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 ...