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  • Resistance adjustable shock absorber

    The suspension system with adjustable resistance damper adopts air spring with variable stiffness, which can adapt to different road surface and driving style. The working principle of the drag-adjustable shock absorber is that when the load of the vehicle increases, the air pressure in the air bag rises, and the air pressure in the air chamber rises accordingly, so that the diaphragm moves downward to balance the pressure produced by the spring. At the same time, the diaphragm drives the plunger rod and the plunger connected with the diaphragm to move downward, which changes the position of the plunger relative to the throttle orifice on the hollow connecting rod. As a result, the cross-section area of the throttle orifice is reduced, that is, the flow rate of oil through the throttle orifice is reduced, thus increasing the oil flow resistance. On the contrary, when the vehicle load decreases, the plunger moves up and the cross-section area of the throttle orifice is enlarged, thus reducing the flow resistance of the oil. Therefore, the resistance of the shock absorber is changed with the change of vehicle load.

    Erica Zhu Feilong Jiangli
    Erica Zhu Feilong Jiangli
    Technology Focus & New Emerging Fields

    What is an automobile shock absorber?

    In order to accelerate the vibration attenuation of the frame and body and improve the ride comfort of the vehicle, vibration absorbers are installed in the suspension system of most automobiles. Both the shock absorber and the elastic element are installed in parallel. Hydraulic shock absorbers are widely used in vehicle suspension systems. The principle of the hydraulic shock absorber is that the oil in the shock absorber shell flows repeatedly from one cavity to another through some narrow cavities when the piston moves in the cylinder cylinder when the driver and the bridge move reciprocating relative to each other. At this time, the friction between the hole wall and the oil and the internal friction of the liquid molecule form a damping force to the vibration, so that the vibration energy of the body and the frame is converted into heat energy, which is absorbed by the oil and shock absorber shell, and then emitted into the air. The damping force of the shock absorber increases or decreases with the relative velocity of the frame and the axle, and is related to the viscosity of the oil. Therefore, it is required that the viscosity of the oil used in the shock absorber should be as little as possible affected by the temperature change, and has the properties of anti-vaporization, anti-oxidation and non-corrosion to various metal and non-metal parts.

    Erica Zhu Feilong Jiangli
    Erica Zhu Feilong Jiangli
    Technology Focus & New Emerging Fields

    Impeller for water pump

    Due to the limitation of installation space and performance requirement, automobile engine cooling water pump has the characteristics of small volume, simple manufacture, and is conducive to mass production. The cooling water pump is usually made up of main parts such as pump body, impeller, shaft, bearing, water seal and pulley. According to the different structure of the engine cylinder block, the pump pressurized water chamber can be integrated on the engine cylinder block, and the impeller can also be separately configured as the core functional components of the pump, its diameter, outlet width, blade structure shape and other parameters and structure design directly determine the performance of the cooling water pump. There are many kinds of cooling water pump structure, according to the impeller material is different, can be divided into cast iron impeller, stamping impeller and plastic impeller; according to the impeller has no cover plate can be divided into open impeller and closed impeller; according to the impeller blade shape is different, can be divided into straight blade impeller, single curvature blade impeller and space twisted blade impeller. With the development of science and technology, cast iron impellers are still used in the cooling water pumps of trucks, buses and other heavy-duty vehicles and a few self-owned passenger cars. Pressed impellers are mostly used in Japanese passenger cars, plastic impellers are mostly used in European and American advanced countries, and three kinds of impellers are used in domestic self-owned brand cars, but with With the introduction of new technology from abroad, plastic impellers have been used in newly developed machines. When cooling water pumps work, the coolant rotates with the impeller on the one hand, and flows out of the rotating impeller on the other.

    Erica Zhu Feilong Jiangli
    Erica Zhu Feilong Jiangli
    Technology Focus & New Emerging Fields
  • Quizzes

  • Fit_and_Dimensional_Tolerances

    Fit_and_Dimensional_Tolerances_Mechanical_Engineering_Drawing Source Ashish K Darpe Department of Mechanical Engineering IIT Delhi Thanks to Mr. Ashish K Darpe Regards Saurabh Jain

    saurabhjain
    saurabhjain
    Powerpoint Presentations 7

    introduction to cfd Computational fluid dynamics

    its useful ppt about CFD •Computational fluid dynamics (CFD) is the science of predicting fluid flow, heat transfer, mass transfer, chemical reactions, and related phenomena by solving the mathematical equations which govern these processes using a numerical process.

    pranav lad
    pranav lad
    Powerpoint Presentations 5

    Machine Design II ppt

    Presentation on Design of- Clutch Brake Belts Chain Gears

    saurabhjain
    saurabhjain
    Powerpoint Presentations 5

    Geometric Dimensioning and Tolerancing

    Geometric Dimensioning and Tolerance ppt Five powerpoint presentations

    saurabhjain
    saurabhjain
    Powerpoint Presentations 7

    Metal Forming

    Powerpoint Notes on Metal forming Topic includes— Hot &Cold working
    Forging
    Extrusion
    Rolling
    Drawing

    saurabhjain
    saurabhjain
    Powerpoint Presentations 5

    HVAC Basics

    Basic concepts of air conditioning system

    saurabhjain
    saurabhjain
    Powerpoint Presentations
  • Which of the following impurity in cast iron makes it hard and brittle ?

    You can share the question or answer in poll You can also add comments for explanation

    saurabhjain
    saurabhjain
    Mechanical Engineering Questions 5

    Which type of lubrication system is this?

    Which type of lubrication system is this? please explain 1. You can answer this question 2. You can like the best answer 3. You can share the question...

    saurabhjain
    saurabhjain
    Mechanical Engineering Questions 7

    What is difference between riveted joint and welding joint ??

    What is difference between riveted joint and welding joint ?? 1. You can answer this question 2. You can like the best answer 3. You can share the question...

    saurabhjain
    saurabhjain
    Mechanical Engineering Questions 1
  • 18 Mechanical Properties Which Every Mechanical Engineer Should Know

    Selection of material is an important aspect for manufacturing industries . The quality of product is highly depends upon its material properties. These properties are used to distinguish materials from each other. For Example: A harder material is used to make tools.A ductile material is used to draw wires. So the knowledge of mechanical properties of material is desirable for any mechanical student or for any person belongs to mechanical industries. This post brings top 18 mechanical properties.  Mechanical properties of material: There are mainly two types of materials. First one is metal and other one is non metals. Metals are classified into two types : Ferrous metals and Non-ferrous metals. Ferrous metals mainly consist iron with comparatively small addition of other materials. It includes iron and its alloy such as cast iron, steel, HSS etc. Ferrous metals are widely used in mechanical industries for its various advantages. Nonferrous metals contain little or no iron. It includes aluminum, magnesium, copper, zinc etc. Most Mechanical properties are associated with metals. These are #1. Strength: The ability of material to withstand load without failure is known as strength. If a material can bear more load, it means it has more strength. Strength of any material mainly depends on type of loading and deformation before fracture. According to loading types, strength can be classified into three types. a. Tensile strength: b. Compressive strength: 3. Shear strength: According to the deformation before fracture, strength can be classified into three types. a. Elastic strength: b. Yield strength: c. Ultimate strength: #2. Homogeneity: If a material has same properties throughout its geometry, known as homogeneous material and the property is known as homogeneity. It is an ideal situation but practically no material is homogeneous. #3. Isotropy: A material which has same elastic properties along its all loading direction known as isotropic material. #4. Anisotropy: A material which exhibits different elastic properties in different loading direction known as an-isotropic material. #5. Elasticity: If a material regain its original dimension after removal of load, it is known as elastic material and the property by virtue of which it regains its original shape is known as elasticity. Every material possess some elasticity. It is measure as the ratio of stress to strain under elastic limit. #6. Plasticity: The ability of material to undergo some degree of permanent deformation without failure after removal of load is known as plasticity. This property is used for shaping material by metal working. It is mainly depends on temperature and elastic strength of material. #7. Ductility: Ductility is a property by virtue of which metal can be drawn into wires. It can also define as a property which permits permanent deformation before fracture under tensile loading. The amount of permanent deformation (measure in percentage elongation) decides either the material is ductile or not. Percentage elongation = (Final Gauge Length – Original Gauge Length )*100/ Original Gauge Length If the percentage elongation is greater than 5% in a gauge length 50 mm, the material is ductile and if it less than 5% it is not. #8. Brittleness: Brittleness is a property by virtue of which, a material will fail under loading without significant change in dimension. Glass and cast iron are well known brittle materials. #9. Stiffness: The ability of material to resist elastic deformation or deflection during loading, known as stiffness.  A material which offers small change in dimension during loading is more stiffer. For example steel is stiffer than aluminum. #10. Hardness: The property of a material to resist penetration is known as hardness. It is an ability to resist scratching, abrasion or cutting.  It is also define as an ability to resist fracture under point loading. #11. Toughness: Toughness is defined as an ability to withstand with plastic or elastic deformation without failure. It is defined as the amount of energy absorbed before actual fracture. #12. Malleability: A property by virtue of which a metal can flatten into thin sheets, known  as malleability. It is also define as a property which permits plastic deformation under compression loading. #13. Machinability: A property by virtue of which a material can be cut easily. #14. Damping: The ability of metal to dissipate the energy of vibration or cyclic stress is called damping. Cast iron has good damping property, that’s why most of machines body made by cast iron. #15. Creep: The slow and progressive change in dimension of a material under influence of its safe working stress for long time is known as creep. Creep is mainly depend on time and temperature. The maximum amount of stress under which a material withstand during infinite time is known as creep strength. #16. Resilience: The amount of energy absorb under elastic limit during loading is called resilience. The maximum amount of the energy absorb under elastic limit is called proof resilience.   #17. Fatigue Strength: The failure of a work piece under cyclic load or repeated load below its ultimate limit is known as fatigue. The maximum amount of cyclic load which a work piece can bear for infinite number of cycle is called fatigue strength. Fatigue strength is also depend on work piece shape, geometry, surface finish etc. #18. Embrittlement: The loss of ductility of a metal caused by physical or chemical changes, which make it brittle, is called embrittlement.

    saurabhjain
    saurabhjain
    Material Science

    Types of Welding

    Welding is a process of joining similar and dissimilar metals or other material by application of heat with or without application of pressure and addition of filler material. It is used as permanent fasteners. Welding is essential process of every manufacturing industries.  In fact, the future of any new metal may depend on how far it would lend itself to fabrication by welding.
    The weldability has been defined as the capacity of being welded into inseparable joints having specified properties such as definite weld strength proper structure. The weldability of any metal depends on five major factors. These are melting point, thermal conductivity, thermal expansion, surface condition, and change in microstructure. Types of welding: Basically welding may be classified into three types. 1. Plastic welding: In plastic welding or pressure welding process, the pieces of metal to be joined are heated to a plastic state and then forced together by external pressure. These welding are also known as liquid-solid welding process. This procedure is used in forge welding and resistance welding. 2. Fusion welding: In the fusion welding or no pressure welding process, the material at the joint is heated to a molten state and allowed to solidify. These welding are also known as liquid state welding process. This includes gas welding, arc welding, thermite welding etc. 3. Cold welding: In this welding process, the joints are produced without application of heat, but by applying pressure which results diffusion or inter-surface molecular fusion of the parts to be joined. It is also known as solid state welding process. This process is mainly used for welding nonferrous sheet metal, particularly aluminum and its alloys. This includes ultrasonic welding, friction welding, Explosive welding etc.  4 Main Welding Processes: 1. Arc Welding (Fusion Welding): In this type of welding process, weld metal melted from the edges to be joined and allow to solidifies from the liquid state and usually below the recrystallization temperature without any applied deformation.  Arc welding is most extensively employed method of joining metal parts by fusion. In this welding the arc column is generated between an anode, which is the positive pole of power supply, and the cathode, the negative pole. When these two conductors of an electric circuit are brought together and separated for a small distance such that the current continues to flow through a path of ionized particles called plasma, an electric arc is formed. This ionized gas column acts as a high resistance conductor that enables more ions to flow from the anode to the cathode. Heat is generated as the ions strike the cathode. This heat used as melting of metal to be joined or melting the filler metal which further used as joining material of welding metal. The electrode is either consumable or non-consumable as per welding requirement.  The temperature at the center of the arc being 6000 OC to 7000OC   2. Gas Welding: The gas welding is done by burning of combustible gas with air or oxygen in a concentrated flame of high temperature. As with other welding methods, the purpose of the flame is to heat and melt the parent metal and filler rod of a joint. It can weld most common materials   3. Gas Metal arc welding (MIG): This welding is also known as metal inert gas welding. In this type of welding a metal rod is used as one electrode, while the work being welded is used as another electrode. It is a gas shielded metal arc welding which uses the high heat of an electric arc between a continuously fed, consumable electrode wire and the material to be welded. Metal is transferred through protected arc column to the work. In this process the wire is fed continuously from a reel through a gun to constant surface imparts a current upon the wire. In this welding the welding area is flooded with a gas which will not combine with the metal. The rate of flow gas is sufficient to keep the oxygen of the air away from the hot metal surface while welding is being done. 4. Gas Tungsten Arc Welding (TIG): This welding is also known as tungsten inert gas welding is similar to the MIG in that is uses the gases for shielding. This arc welding process uses the intense heat of an electric arc between a no consumable tungsten electrode and the material to be welded. In this process the electrode is not consumable during welding process and gas is used to protect the weld area form atmospheric air.   

    saurabhjain
    saurabhjain
    Manufacturing Technology 1

    Difference between Hot Working and Cold Working

    They both are the metal forming processes. When plastic deformation of metal is carried out at temperature above the recrystallization temperature the process, the process is known as hot working. If this deformation is done below the recrystallization temperature the process is known as cold working. There are many other differences between these processes which are described as below. Difference between Hot Working and Cold Working: S.No.   Cold working     Hot working   1   It is done at a temperature below the recrystallization temperature.   Hot working is done at a temperature above recrystallization temperature.   2.   It is done below recrystallization temperature so it is accomplished by strain hardening.   Hardening due to plastic deformation is completely eliminated.   3.   Cold working decreases mechanical properties of metal like elongation, reduction of area and impact values.   It increases mechanical properties.   4.   Crystallization does not take place.   Crystallization takes place.   5.   Material is not uniform after this working.   Material is uniform thought.   6.   There is more risk of cracks.   There is less risk of cracks.   7.   Cold working increases ultimate tensile strength, yield point hardness and fatigue strength but decreases resistance to corrosion.   In hot working, ultimate tensile strength, yield point, corrosion resistance are unaffected.   8.   Internal and residual stresses are produced.   Internal and residual stresses are not produced.     9.
    Cold working required more energy for plastic deformation.
    It requires less energy for plastic deformation because at higher temperature metal become more ductile and soft.   10.
    More stress is required.
    Less stress required.   11.
    It does not require pickling because no oxidation of metal takes place.
    Heavy oxidation occurs during hot working so pickling is required to remove oxide.   12.
    Embrittlement does not occur in cold working due to no reaction with oxygen at lower temperature.
    There is chance of embrittlement by oxygen in hot working hence metal working is done at inert atmosphere for reactive metals.

    saurabhjain
    saurabhjain
    Manufacturing Technology 4

    CLASSIFICATION OF FLUIDS

    Ideal fluid: A fluid, which is incompressible and having no viscosity, is known as an ideal fluid. Ideal fluid is only an imaginary fluid as all the fluids, which exist, have some viscosity. Real fluid: A fluid, which possesses viscosity, is known as real fluid. All the fluids, in actual practice, are real fluids. Example : Water, Air etc. Newtonian fluid: A real fluid, in which shear stress in directly proportional to the rate of shear strain or velocity gradient, is known as a Newtonian fluid. Example : Water, Benzine etc. Non Newtonian fluid: A real fluid, in which shear stress in not directly proportional to the rate of shear strain or velocity gradient, is known as a Non Newtonian fluid. Example : Plaster, Slurries, Pastes etc.  Ideal plastic fluid: A fluid, in which shear stress is more than the yield value and shear stress is proportional to the rate of shear strain or velocity gradient, is known as ideal plastic fluid. Incompressible fluid: A fluid, in which the density of fluid does not change which change in external force or pressure, is known as incompressible fluid. All liquid are considered in this category. Compressible fluid: A fluid, in which the density of fluid changes while change in external force or pressure, is known as compressible fluid. All gases are considered in this category. Graphical representation of different fluids: Tabular representation of fluid types: Types of fluid Density Viscosity Ideal fluid Constant Zero Real fluid Variable Non zero Newtonian fluid Constant/ Variable T = u(du/dy) Non Newtonian fluid Constant/ Variable T ≠ u(du/dy) Incompressible fluid Constant Non zero/zero Compressible fluid Variable Non zero/zero CLASSIFICATION OF FLOWS ON THE BASIS OF MACH NUMBER. Incompressible flow-M less than 0.3 Compressible subsonic flow-M between 0.3 and 1 Transonic flow-M ranging between values less than 1 and more than 1 Supersonic flow-M greater than 1 but less than 5 Hypersonic flow - M greater than 5  

    saurabhjain
    saurabhjain
    Fluid Mechanics 1
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  1. Today
  2. The suspension system with adjustable resistance damper adopts air spring with variable stiffness, which can adapt to different road surface and driving style. The working principle of the drag-adjustable shock absorber is that when the load of the vehicle increases, the air pressure in the air bag rises, and the air pressure in the air chamber rises accordingly, so that the diaphragm moves downward to balance the pressure produced by the spring. At the same time, the diaphragm drives the plunger rod and the plunger connected with the diaphragm to move downward, which changes the position of the plunger relative to the throttle orifice on the hollow connecting rod. As a result, the cross-section area of the throttle orifice is reduced, that is, the flow rate of oil through the throttle orifice is reduced, thus increasing the oil flow resistance. On the contrary, when the vehicle load decreases, the plunger moves up and the cross-section area of the throttle orifice is enlarged, thus reducing the flow resistance of the oil. Therefore, the resistance of the shock absorber is changed with the change of vehicle load.
  3. In order to accelerate the vibration attenuation of the frame and body and improve the ride comfort of the vehicle, vibration absorbers are installed in the suspension system of most automobiles. Both the shock absorber and the elastic element are installed in parallel. Hydraulic shock absorbers are widely used in vehicle suspension systems. The principle of the hydraulic shock absorber is that the oil in the shock absorber shell flows repeatedly from one cavity to another through some narrow cavities when the piston moves in the cylinder cylinder when the driver and the bridge move reciprocating relative to each other. At this time, the friction between the hole wall and the oil and the internal friction of the liquid molecule form a damping force to the vibration, so that the vibration energy of the body and the frame is converted into heat energy, which is absorbed by the oil and shock absorber shell, and then emitted into the air. The damping force of the shock absorber increases or decreases with the relative velocity of the frame and the axle, and is related to the viscosity of the oil. Therefore, it is required that the viscosity of the oil used in the shock absorber should be as little as possible affected by the temperature change, and has the properties of anti-vaporization, anti-oxidation and non-corrosion to various metal and non-metal parts.
  4. Yesterday
  5. Erica Zhu Feilong Jiangli

    Impeller for water pump

    Due to the limitation of installation space and performance requirement, automobile engine cooling water pump has the characteristics of small volume, simple manufacture, and is conducive to mass production. The cooling water pump is usually made up of main parts such as pump body, impeller, shaft, bearing, water seal and pulley. According to the different structure of the engine cylinder block, the pump pressurized water chamber can be integrated on the engine cylinder block, and the impeller can also be separately configured as the core functional components of the pump, its diameter, outlet width, blade structure shape and other parameters and structure design directly determine the performance of the cooling water pump. There are many kinds of cooling water pump structure, according to the impeller material is different, can be divided into cast iron impeller, stamping impeller and plastic impeller; according to the impeller has no cover plate can be divided into open impeller and closed impeller; according to the impeller blade shape is different, can be divided into straight blade impeller, single curvature blade impeller and space twisted blade impeller. With the development of science and technology, cast iron impellers are still used in the cooling water pumps of trucks, buses and other heavy-duty vehicles and a few self-owned passenger cars. Pressed impellers are mostly used in Japanese passenger cars, plastic impellers are mostly used in European and American advanced countries, and three kinds of impellers are used in domestic self-owned brand cars, but with With the introduction of new technology from abroad, plastic impellers have been used in newly developed machines. When cooling water pumps work, the coolant rotates with the impeller on the one hand, and flows out of the rotating impeller on the other.
  6. Last week
  7. Today, we learn the fourth categories of automotive rubber products: Belt products. Belt products are mainly used in automobiles to transfer torque power and speed, power from the power source engine to the need for power systems and places. It is installed in cooling fan, cooling water pump, brake compressor, booster pump, air conditioning system and steering system. The car belt is mainly V belt. Usually there are three kinds, that is, wrapped V belt, cutting V and multi wedge belt to cut W belt. Cutting V-belt has no coating on both sides, good flexibility, friction coefficient, with a large force, high linear speed, heat dissipation and fatigue resistance and energy-saving characteristics, commonly used rubber MIBR and R. Synchronous toothed joint is used for valve ignition of automotive engines. Its operating conditions are high speed, high power and high temperature.
  8. abhijeet chandak

    CAM

    A cam is a rotating or sliding piece in a mechanicallinkage used especially in transforming rotary motion into linear motion. It is often a part of a rotating wheel (e.g. an eccentric wheel) or shaft (e.g. a cylinder with an irregular shape) that strikes a lever at one or more points on its circular path.
    • Graded Mode
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    Mechanical Engineering Quiz 5
  9. (1) its unique properties are high elasticity. An object can be shaped by an external force, which is the most obvious manifestation of the deformation. This highly valuable rubber elasticity is not found in any other engineering material. (2) It has a certain mechanical strength and has the ability to relax impact and absorb vibration. (3) Excellent properties such as abrasion resistance, insulation, impervious and airtight. (4) Some special synthetic rubber also has the characteristics of oil resistance, corrosion resistance, heat resistance, cold resistance, fire resistance, aging resistance, radiation resistance and so on. Rubber is divided into natural rubber and synthetic rubber according to raw materials. It is divided into general oak and special oak according to application. The common types of rubber used in automobiles are natural rubber, styrene-butadiene rubber, chloroprene rubber, nitrile-butadiene rubber, EPDM, acrylate rubber, fluorine rubber, silicone rubber, polyurethane rubber and butyl rubber.
  10. abhijeet chandak

    CAD software to use?

    CAD, or computer-aided design and drafting (CADD), is the use of computer technology for design and design documentation. CAD software replaces manual drafting with an automated process. If you work in the architecture, MEP or structural engineering fields, you have probably used 2D or 3DCAD programmes.
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    Mechanical Engineering Quiz 4
  11. Classification of Automobiles. (A) According to Use 1.Auto cycle. 2.Motor cycle. 3.Car and Jeep. 4.Buses and Trucks. (B) According to capacity 1.Heavy transport vehicle e.g. Trucks and buses. 2.Light transport vehicle e.g. Car,Jeep (C) According to fuel used 1.Petrol vehicle e.g. scooter,BIke 2.Diesel vehicle e.g. Car,Truck,Buses 3.Gas vehicle e.g. Auto rikshaw 4.Solar vehicle e.g. Car. (D) According to Wheels 1.Two wheelers e.g Bike,Scotty 2.Three Wheelers e.g. Auto Rikshaw 3.Four Wheelers e.g. Car,Jeep 4.Six and More Wheel e.g. buses and Heavy Truck (E) According to drive (i) According to sitting 1.Left hand drive e.g American vehicle 2.Right hand drive e.g Indian vehicle (ii) Accoring to power 1.Front wheel drive 2.Rear wheel drive 3.All wheel drive (F) According to transmission 1.Conventional type e.g. Gear box 2.Semi automatic 3.Fully automatic (G) According to suspension system 1.Conventional : Leaf spring 2.Independent : Hydraulic shock absorber (H) According to engine fitting 1.Front engine. 2.Rear engine 3.Transverse under floor engine e.g Bus engine (I) According to body construction 1.Closed car. e.g Alto 800,Swift 2.Open car e.g Racing car 3.Special Car e.g Lemborgini
  12. I graduated in 2013 with a mechanical engineering degree from Pensacola Christian College and then worked for almost three years at a manufacturing facility writing and submitting reports on non conforming parts and updating technical instructions through Team center. I decided that I wanted to continue my education and travel, so I joined the Air Force. I have a little more than a year left so I'm trying to decide what I should use my GI bill for. I've toyed with some programming and found that I really enjoy it so I was thinking about maybe getting another bachelor's in computer science. Would this be a worthwhile pursuit? Or would it be better for me to get a master's degree? I was thinking systems engineering, but I don't know if I have enough real world experience to get the most out of those classes. Any advice?
  13. abhijeet chandak

    Cad tool for Mechanical part

    NX is generally used for design of Parts having complicated shapes. It has many tool for Part Designing. Pros – Lots of tools are present to design a Part. The name of tools are simple and easy to understand their purpose. Drafting is easy. Cons – Little hard to understand User Interface. Surfacing section is less. Less rendering options available. Applications – Part Design, CAM, Tool Design, etc. Key Functions of NX: Computer-Aided Design (CAD) (Design)Parametric Solid Modeling (Feature-Based and Direct Modelling)Free Form surface modelling ( Class A Surfaces)Reverse EngineeringStyling and computer-aided industrial designEngineering Drawing (Drafting)Product and Manufacturing Information (PMI)Reporting and Analytics, Verification and ValidationKnowledge Reuse, Including Knowledge-Based EngineeringSheet Metal DesignAssembly Modelling and Digital MockupRouting for electrical Wiring and Mechanical Piping Computer-Aided engineering (CAE) (Simulation)Stress Analysis/Finite Element Method (FEM)KinematicsComputational Fluid Dynamics (CFD) and Thermal Analysis Computer-Aided Manufacturing (CAM) (Manufacturing)Numerical Control (NC) Programming
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    Test your mechanical engineering concepts You need to login to take this quiz
  14. abhijeet chandak

    Cad tool for Mechanical part

    The fastest kernel for solid-surface hybrid modeling Make full use of existing drawings with powerful data exchange when product planning Multiple methods of verification to guarantee the quality of your design Enhance internal and external cooperation with sample making Available in several versions, including ZW3D Standard, ZW3D Professional, ZW3D Premium, ZW3D 2X Machining, ZW3D 3X Machining, ZW3D Lite, and ZW3D Student Version
  15. 【Feilong Jiangli Technology Corner】This power assembly mounting arrangement design uses more mature left, right engine side and transmission side three-point mounting arrangement, are rubber mounting. In the road test of NVH performance of mounting system, one measuring point (three-way sensor) is arranged on the active side (i.e. connecting engine side mounting bracket) and the passive side (i.e. connecting body side mounting bracket) of each mounting. The noise measuring points are located in the driver's right ear, the right ear of the non-left seat and the right ear of the rear left seat respectively. Set up a measuring point. Under the condition of slow acceleration, the active and passive side brackets of the engine have obvious resonance bands around 260 Hz, and the maximum speed of the engine is about 3860 rpm. Under the condition of slow acceleration, the sound pressure inside the vehicle has obvious peak value at about 3860rpm of the engine speed.
  16. Dr abdou abdallah

    Mechanical aptitude test

    Q30 E Q22 E Q26 A 24 A 29 D
  17. Houda Mehdid

    Mechanical aptitude test

    Could you please answer these questions in the photos below?! Thank you!
  18. Dear Mechanical Engineers!

    I have come across some aptitude tests and I really need your help big time and ASAP.  I answered myself but I found them quite challenging and 5.PNG.3534c2e77e4b7c7f483caf14c182bddd.PNG, please lend me a hand!!

     

    Thank you!!! 

    1.PNG

    2.PNG

    3.PNG

    3.PNG

    4.PNG

    1. Houda Mehdid

      Houda Mehdid

      My answers are as follows:

      Question 30 => E

      Question 22 => C

      Question 26 => B

      Question 24 => B 

  19. Since tan of the angle of respose is equal to the coefficient of friction. Why can't we find the angle of repose by simply finding the tan inverse of coefficient of friction.
  20. abhijeet chandak

    Pump Bearing

    Centrifugal Pump Bearings Rotodynamic pumps such as centrifugal pumps use a rotating impeller to increase the pressure of fluid through the piping system. AST Bearings has the knowledge and expertise to meet demanding specifications for the centrifugal pump industry. These fluid pumping systems often require a wide range of bearing types which AST Bearings is easily capable of supplying or engineering to meet specific liquid pump demands.
  21. In order to better realize the technology and meet the idea of design, and to ensure the bushing to be in normal working condition more effectively in the whole vehicle assembly process, Feilong Jiangli know that a suitable reference point must be chosen as the initial zero angle of the rubber bushing when the whole vehicle assembly is assembled, and this reference point should be the best working state of the bushing. In order to keep this optimum working state as long as possible, so Feilong Jiangli choose the vehicle's most normal working state as the village's initial zero angle. In the case of the car, it is considered that the normal condition of the car is empty or half load, that is, the ground state that people often say, the assembly process of the bushing at this time is called the landing tightening process, that is to say, the rubber bushing is tightened after the whole vehicle falls to the ground.
  22. YOu can get the books and knowledge from various sources.
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    Here you can find an attachments for safety in industries
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  25. abhijeet chandak

    Why gas containers are mostly cylindrical in shape?

    To lower the stress concentration at the very sharo edges of the various shape like sqr. trin.rec. or any various shape. The Best shape is to utilized spherical shape but it is not possible . In refineries the very big spherical containers are there for used of storage , but for distribution purpose the cylindrical shape is the very much suitable shape.
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