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Mechanical Engineering


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Everything posted by machinemaker

  1. Walter launches a product line for the machining of ISO N materials with solid carbide milling cutters
  2. Nanotechnology-based startup-Log 9, On 14 July, announced the trials of the new rapid charging EV batteries in several cities to bring down the charging time from several hours to only 15 minutes and making the EVs go for 60 Km in one charge. The startup aims to equip the two-wheelers and three-wheelers with rapid charging batteries to attaining a global vision of the ‘Clean Energy Transition.’
  3. Do you which company was given a 15-year contract in May 2020 to design, produce, and supply 210 regional commuter and transit train cars for Indian railways ?
  4. India's first aerospace-focused SEZ was built by which company?
  5. Recently which manufacturing company was given rights to manufacture trains for India's first Regional Rapid Transit System (RRTS)?
  6. Walter launches a product line for the machining of ISO N materials with solid carbide milling cutters. The machining of ISO N materials such as wrought aluminium alloys and cast aluminium alloys or copper presents a challenge for tools. Walter is launching a product line developed especially for this with the MC267 Advance solid carbide milling cutters. The universal milling cutters with centre cut and diameter of 1 to 20 mm are suitable for a wide range of applications, including sectors involving micromachining operations, such as the electronics industry. With two or three flutes, they can be used on machines with a different performance spectrum, for roughing as well as semi-finishing and finishing. The combination of geometry (45° helix angle) and low-vibration micro geometry enables a high level of stability and process reliability.
  7. Government policies are only a bonus? The EV industry must prepare itself as a hub for EV manufacturing, believes Kalpit Patel, Founder of Mumbai based PMV Electric. Kalpit and his young team are developing EaS-E2, a four-wheeler 2-seater microcar Electric Vehicle with a lower footprint for Urban Personal mobility. This personal electric car will use LFP batteries with inherently safer cells and its chemistry allows a greater number of cycles.
  8. natural gas power plant is a thermal power station which burns natural gas to generate electricity. Natural gas power stations generate almost a quarter of world electricity and a significant part of global greenhouse gas emissions and thus climate change. Natural gas power plants generate electricity by burning natural gas as their fuel. There are many types of natural gas power plants which all generate electricity, but serve different purposes. All natural gas plants use a gas turbine; natural gas is added, along with a stream of air, which combusts and expands through this turbine causing a generator to spin a magnet, making electricity. There is waste heat that comes from this process, because of the second law of thermodynamics.
  9. Biodiesel is a renewable, biodegradable fuel manufactured domestically from vegetable oils, animal fats, or recycled restaurant grease. Biodiesel meets both the biomass-based diesel and overall advanced biofuel requirement of the Renewable Fuel Standard. Renewable diesel, also called “green diesel,” is distinct from biodiesel. Biodiesel is a liquid fuel often referred to as B100 or neat biodiesel in its pure, unblended form. Like petroleum diesel, biodiesel is used to fuel compression-ignition engines. See the table for biodiesel's physical characteristics. Biodiesel performance in cold weather depends on the blend of biodiesel, the feedstock, and the petroleum diesel characteristics. In general, blends with smaller percentages of biodiesel perform better in cold temperatures. Typically, regular No. 2 diesel and B5 perform about the same in cold weather. Both biodiesel and No. 2 diesel have some compounds that crystallize in very cold temperatures. In winter weather, fuel blenders and suppliers combat crystallization by adding a cold flow improver. For the best cold weather performance, users should work with their fuel provider to ensure the blend is appropriate.
  10. Typical Metric and Imperial bolt torques are indicated in the links below: Metric Bolts - Tightening Torques. US Bolts - Tightening Torques Calculate required bolt torque normal dry: K = 0.2. nonplated black finish: K = 0.3. zinc-plated: K = 0.2. slightly lubricated: K = 0.18. cadmium-plated: K = 0.16. For more visit https://www.engineeringtoolbox.com/bolt-torque-load-calculator-d_2065.html
  11. A standard air conditioner or cooling system uses a specialized chemical called refrigerant, and has three main mechanical components: a compressor, a condenser coil and an evaporator coil. These components work together to quickly convert the refrigerant from gas to liquid and back again. The compressor raises the pressure and temperature of the refrigerant gas and sends it to the condenser coil where it is converted to a liquid. Then the refrigerant travels back indoors and enters the evaporator coil. Here the liquid refrigerant evaporates, and cools the indoor coil. A fan blows indoor air across the cold evaporator coil where the heat inside the home is absorbed into the refrigerant. The cooled air is then circulated throughout the home while the heated evaporated gas is sent back outside to the compressor. The heat is then released into the outdoor air as the refrigerant returns to a liquid state. This cycle continues until your home has reached the desired temperature.
  12. Gears are mechanisms that mesh together via teeth and are used to transmit rotary motion from one shaft to another. Gears are defined by two important items: radius and number of teeth. They are typically mounted, or connected to other parts, via a shaft or base. Radius: The gear radius is defined differently depending on the particular section of the gear being discussed. The two most relevant measurements, however, are the root radius and the addendum radius. The root radius is the distance from the center of the gear to the base of the teeth while the addendum radius (also called the "pitch" radius) is the distance from the center of the gear to the outside of the teeth. Teeth: The teeth are the portion of the gear that makes contact with another gear. In order for two gears to mesh together the pitch must be the same for all mating pairs. The pitch of a gear is the distance between equivalent points of adjacent teeth. When the teeth of gears mesh properly they prevent slipping and can exhibit efficiencies of up to 98%.
  13. It may seem strange but friction is independent of the actual area of contact. The reason behind this is that the actual area of contact on an atomic scale is a fraction of the total surface area. Friction happens due to the interatomic forces at these minute regions of atomic contact. The fraction of the geometric area in atomic contact is proportional to the normal force divided by the geometric area. If the normal force is doubled, the area of atomic contact is also doubled and the friction becomes twice as large. But, if the geometric area is doubled whilst the normal force remains the same, the fraction of area in atomic contact is halved and the actual area in atomic contact hence the friction force remains constant.
  14. Classes of fire There are six different types of fire classes and here is a detailed list covering types of fire included in each class: Class A – fires caused by combustible materials including paper, fabric, wood and other flammable solids. Class B – fires caused by flammable liquids such as paint, turpentine or petrol among others. Class C – fires caused by flammable gases including methane, butane or hydrogen among others. Class D – fires caused by combustible metals including potassium, aluminium or magnesium among others. Class F – fires include those caused by cooking oils such as a chip-pan fire. Electrical Fires – fires involving electrical equipment but upon removal of the electrical item, the fire class is changed. Fire Extinguisher Types and Colour Codes The six main fire extinguisher types are water, foam, CO2, powder, water mist and wet chemical. Each of the different types of fire extinguisher is suitable for different fire classes. It is important that you purchase the right fire extinguisher for your needs: Water - Class A fires (solid combustibles such as wood, paper and textiles). Some water extinguishers are safe on electrical equipment if di-electrically tested. Otherwise caution is required near electrical equipment, as ordinary water is a conductor. AFFF foam - Class A and B (flammable liquids). Safe on electrical equipment if di-electrically tested. Carbon dioxide (CO2) - Class B and electrical equipment ABC powder - Class A, B, C (flammable gases) and electrical equipment De-Ionised Water mist - Class A, B, C and electrical equipment Wet chemical - Class F (deep fat) fires, sometimes class A For more information visit - https://fire-risk-assessment-network.com/blog/types-fire-extinguisher/
  15. Here are some information about materials selection also different materials and their benefits. Hope it helps. https://www.sciencedirect.com/topics/materials-science/material-selection https://depts.washington.edu/matseed/mse_resources/Webpage/Bicycle/Material Selection Process.htm https://www.imetllc.com/training-article/materials-selection-design-requirements/?doing_wp_cron=1625973952.6485478878021240234375 https://civilwale.com/types-of-building-materials/
  16. https://en.m.wikipedia.org/wiki/Involute#Involutes_of_a_circle The paradigm for unwrapping the circumference will help solve this problem.
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