The following points highlight the seven main types of longitudinal rolling stands. The types are: 1. Two High Rolling Stand 2. Three High Rolling Stand 3. Four High Rolling Stand 4. Sendzimir Rolling Stands 5. Planetary Rolling Stands 6. Universal Rolling Stands 7. Rolling of Splines. Type # 1. Two High Rolling Stand: A rolling stand is the basic rolling [...]
The following points highlights the sixteen equipment required for substations and switchgear installations. The equipment are: 1. Main Bus-Bars 2. Current Limiting Reactors 3. Station Insulators 4. Switchgear 5. Switches 6. Fuses 7. Circuit Breakers 8. Protective Relays 9. Power Transformers 10. Instrument Transformers 11. Lightning Arresters 12. Indicating and Metering Instruments 13. Batteries and others. 1. Main Bus-Bars: Bus-bar [...]
In this article we will discuss about:- 1. Definition of Sand Moulds 2. Classification of Sand Moulds 3. Feeding of Metal. Definition of Sand Moulds: A sand moulds may be defined as-a preformed sand container into which molten metal is poured and allowed to solidify. After casting it is removed from the sand mould, sand mould is generally destroyed. The [...]
Forging hammers are commonly used for impression-die forging and can be used for a variety of forging operations. In forging hammers a heavy ram containing the upper die is lifted by steam pressure or air pressure, then driven or allowed to fall on the workpiece which is placed on the bottom die, which in turn is supported on the anvil. [...]
In this article we will discuss about:- 1. Introduction to Electrodes 2. Ingredients of Electrodes 3. Electrode Covering/Coating 4. Classification 5. Factors to be Considered in Selection 6. Disadvantages 7. Electrode Efficiency. Introduction to Electrodes: Bare, fluxed and heavy coated electrodes are types of metal electrodes most commonly used. Bare electrodes have limited applications as during the welding operation, they [...]
In this article we will discuss about the maintainability of equipment in an industry. Maintainability Criteria of an Equipment: The main criteria of maintainability of an equipment is that it must have high availability, mean time to repair the fault should be minimum, it should be possible to increase mean time between failure by undertaking preventive maintenance at regular intervals. [...]
In this article we will discuss about the design of welding transformer with the help of diagram. A welding transformer has two circuits one is primary and other is secondary circuit. These two winding have no electrical connections but magnetically they are coupled together. The main function of transformer is to change high voltages low amperage ac power for welding. [...]