Commonly Used Tools in Foundry Shop
ME Mechanical
by Vinodh Reddy Chennu
7M ago
A foundry shop is where the metal casting is prepared by melting and pouring the molten metal into moulds. Some commonly used tools in the foundry shop for the molding process are shovel, trowel, riddle, rammer, draw spike, swab, vent wire and slick tool. Shovel: Shovel tool is used to mix and temper molding sand and move the sand pile to the flask. Trowel: A trowel tool is used to shape and smooth the surfaces of the mold and to do minor repairs. They are made of steel and are relatively long and narrow. Riddle: A Riddle tool is a screen or sieve used to remove small pieces of metal and fo ..read more
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6 Reasons Your Car Might Not Be Performing Well and How to Fix Them
ME Mechanical
by Jordan McDowell
1y ago
Show/Hide Page Index This page is all about Introduction 1. You’re Using the Wrong Fuel 2. Your Spark Plugs Are Worn 3. Your Air Filter Is Dirty 4. Your Fuel Pump Is Bad 5. You’re Blasting the Air Conditioner 6. Your Lift Supports Aren’t Working Have you noticed a change for the worse in your car’s performance lately? We’ve all been there: a couple months ago, your car drove like a dream, and now there’s a whining noise coming from your back seat and your car failed its emissions test. These are six common reasons your car’s performance may decrease and how to fix them. 1. You’re Using the ..read more
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Energy: Introduction and Types
ME Mechanical
by ME Mechanical Team
1y ago
Show/Hide Page Index This page is all about Introduction Types of Energy Nuclear Energy Electrical Energy Thermal Energy Chemical Energy Radiant Energy Potenial Energy Kinetic Energy   In physics, energy is defined as a property of objects which can be transferred from one object to another object or converted into different forms of energy. Energy is the capacity to do work, generating heat and emitting light. Heat is the ability to change the temperature of an object or phase of a substance. For example, heat changes from ice into water or water into water vapor. Heat is part of the ..read more
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Law of Conservation of Energy
ME Mechanical
by Vinodh Reddy Chennu
1y ago
Energy cannot be created or destroyed, but only it can change from one form to another form. The law of conservation of energy does not distinguish between useful and wasted energy. The law neglects ‘losses’ from the closed system into the environment. In an energy conservation process, energy is transmitted from one or more forms to another form forms resulting in certain work, heat transfer and energy loss. In a closed system containing a certain quantity of matter and energy, several energy transformations may take place from one form to another. The total mass and energy in the c ..read more
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Design for Automated Assembly
ME Mechanical
by ME Mechanical Team
1y ago
Methods suitable for manual assembly may not be the best methods for automated assembly. Some assembly operations readily performed by a human worker are quite difficult to automate (e.g., assembly using bolts and nuts). To automate the assembly process, parts fastening methods must be specified during product design that lends themselves to machine insertion and joining techniques and does not require the senses, dexterity, and intelligence of human assembly workers. Following are the few recommendations and principles that can be applied in product design to facilitate automated assembly: U ..read more
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Mechanical Surface Treatments
ME Mechanical
by ME Mechanical Team
1y ago
Several techniques are used to improve the surface properties of manufactured components mechanically. The most common methods are listed and described under: Shot Peening Laser Shot Peening Water-jet Peening Ultrasonic Peening Roller Burnishing Explosive hardening 1. Shot Peening: In shot peening, the workpiece surface is continuously impacted by many numbers of cast steel, glass, or ceramic shot (small balls), which make overlapping indentations on the surface. This action, using ceramic shot sizes that range between 0.125mm to 5 mm in diameter, causes plastic surface deformation at depths ..read more
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Liquid Chillers
ME Mechanical
by ME Mechanical Team
1y ago
Liquid chillers are machines that remove heat from a liquid via a vapor-compression refrigeration cycle or vapor-absorption refrigeration cycle. This liquid can then be circulated through a heat exchanger to cool equipment. centrifugal water-cooled chiller. Image source: Wikimedia Commons (P199) Liquid chillers can be of two types. They are: Shell and tube type chiller and Shell and coil type chiller. Shell and Tube type Chiller: Shell and tube type of chiller consists of a steel shell, cylindrical in shape fitted with a number of parallel tubes. There can be two types in the configu ..read more
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Log Mean Temperature Difference (LMTD)
ME Mechanical
by ME Mechanical Team
1y ago
The LMTD is a logarithmic average of the temperature difference between the hot and cold fluid streams at each end of the heat exchanger. The larger the value of LMTD, the higher heat is transferred. The rate of heat transfer can be expressed as q = UAΔTm Where ∆Tm is the log mean temperature difference given as In Parallel Flow Heat Exchanger ∆T1 = Thot,in – Tcold,in ∆T2 = Thot,out – Tcold,out In Counter Flow Heat Exchanger ∆T1 = Thot,in – Tcold,out ∆T2 = Thot,out – Tcold,in Assumptions made in LMTD method: The overall heat transfer coefficient (U) is constant throughout the heat energy ..read more
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Gas Tungsten Arc Welding (GTAW)
ME Mechanical
by ME Mechanical Team
1y ago
Show/Hide Table of Contents This page is all about Introduction Applications of Gas Tungsten Arc Welding Advantages of Gas Tungsten Arc Welding Limitations of Gas Tungsten Arc Welding   Gas Tungsten Arc Welding (GTAW), also known as TIG (Tungsten Inert Gas) welding, the filler metal is supplied from a filler wire as shown in the figure below. The tungsten electrode is not used during this welding operation; a constant and stable arc gap is maintained at a consistent current level. The filler metals are similar to the metals to be welded and flux is not used. The shielding gas used in t ..read more
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Gas Metal Arc Welding (GMAW)
ME Mechanical
by ME Mechanical Team
1y ago
Show/Hide Table of Contents This page is all about Introduction Limitations of Gas Metal Arc Welding   Gas Metal Arc Welding (GMAW) is also called metal inert gas (MIG) welding. In the gas metal arc welding process, the weld area is shielded by an inert atmosphere of argon, helium, carbon dioxide, or other gas mixtures. The consumable bare wire is fed automatically through a nozzle into the welding arc by a wire-feed drive motor. In addition to inert shielding gases, de-oxidizers are usually present in the electrode metal to prevent oxidation. gas metal arc welding operation Gas Met ..read more
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