Surface integrity means it is a condition of surface of a component after manufacturing process. After manufacturing process the surface may be consisting of smoother surface or surface with irregularities. These conditions depends on the process characteristics of manufacturing process we have selected for the component.
Generally, a component is made by casting operation or any other machining...
Measurment of Pitch:
Monday, 13 October 2014
A pitch value a screw thread can be measured in so many ways like by using screw pitch gauges, screw plug gauges and also by Tool Maker's Microscope. The screw pitch gauges are provided in a form of number of blades. Each blade provided with different thread profiles having different pitch values. The pitch value...
Measurement of Thread angle:
Monday, 13 October 2014
A Thread angle of a given screw thread can be determined by using Tool Maker's microscope. The microscope gives an enlarged view of the thread profile. In Tool Maker's microscope an illuminating unit is provided below a measuring table. This illuminating unit will focus the edge profile or contour shape of the thread....
Measurement of Minor diameter of External and Internal Threaded component
Sunday, 12 October 2014
Minor Diameter of External Threaded component:
The minor diameter of external threads can be determined by using a special type of micrometer which is provided with number of V-peices. These V pieces are changeable according to the root diameter of the thread profile. This method is used for British...
Measurement of major diameter of internal thread
Sunday, 5 October 2014
There is no perfect method for finding the elements of internal threads. But even we can find them by using screw pitch gauages and screw plug gauges. By using pitch gauges we can measure or check pitch value and by using the screw plug gauge we can measure or check major diameter.
...
Measurement of Major diameter of a screw thread
Sunday, 5 October 2014
The major diameter of a screw thread can be determined by a normal micrometer by carefully adjusting the screw in between in two anvils of micrometer. But there is a difficulty of pressure application during adjusting the screw in between the anvils. Due to this pressure the chance of errors in measurement becomes...
Effect of pitch error
Saturday, 4 October 2014
The pitch error causes increase in effective diameter of bolt or screw and decrease in effective diameter of nut. If δp is the pitch error then increase in effective diameter of bolt or decrees in effective diameter of nut is given by the relation for whit-worth thread = 1.921xδp.
If δθ1 and δθ2 are errors in flank angles in opposite directions, then increase or decrease in effective...
Errors in Threads
Friday, 3 October 2014
Errors in screw threads are related to the five elements of the screw threads. They are major diameter, minor diameter, pitch diameter, pitch and thread angle. If any errors are taking place in these five elements the produced screw is rejected. So, these elements are also be checked with proper gauging system carefully....
Screw Thread Metrology
Friday, 3 October 2014
A Screw Thread Metrology deals with the measurements of the threads. To understand what are the measurements we can take from screw threads, we should know about the terms or elements of the threads. The Screw Thread Terminology gives the list of the terms and their definition those terms.
Screw...
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