Who is the inventor of a dynamo?
Zenobe Gramme, a Belgian inventor exhibited an industrial scale dynamo at the Academy of Sciences in Paris in 1971.
How do you calculate the bend in a pipe?
Using various mathematical formulas such as a 45 degree offset would be 1.4142Then there is 90 DEG, 60 Deg, 45 Deg, 22.5 Deg 11 1/4 DEG1/4 bend 1/8 Bend 1/16 Bend 1/32 Bend and then once yo know the angle you want then do the math
Set a tool in a metal lathe at what angle?
Cutting tools for facing and outside diameter turning are set to an angle of 90 degrees to the bed. Boring tools are set to the same angle as the bed.
Cutting tool tips are already angled to suit its purpose and there's usually no need for further adjustment. They can be set against the inside of the toolpost and fastened.
Tool use to calibrate a micrometer?
Calibrating micrometers: For quick reference the supplied test piece can be used. For calibrating a micrometer, gauge blocks are used.
What is definition of chip to chip time in CNC machine?
It is the idle time when no cutting is taking place. The bigger picture is , to take the total idle time and express it as a percentage of the cycle time. The idea is to get this percentage as small as possible. It is use full on multi slide or multi turret machines where the cutting of two tools can overlap and so reduce chip to chip time. The programmer determines the chip to chip time . The smaller the chip to chip time the smarter the programmer. Efficiency and productivity improves
Many larger saws and similar machinery have control boxes on the front to operate them . Most of these have a prominent red STOP button.
What is an Allen key used for?
An allen key is a square key normally used for a square headed bolt or screw used in mainly self build furniture (flat packed).
Is it necessary to use a torque wrench to repair a car?
There are differences in torque wrenches. One among the wrenches is the click-type torque wrench. It is an easy to handle kit. While applying the wrench and when the torque reaches the desired limit, the device automatically"clicks". This wrench could help you with providing the right amount of torque to be applied. Twisting of torque marks the desired torque to be applied.
How the capacitor create a phase difference in single phase induction motor?
The stator consists of the main winding and a starting winding (auxiliary). The starting winding is connected in parallel with the main winding and is placed physically at right angles to it. A 90-degree electrical phase difference between the two windings is obtained by connecting the auxiliary winding in series with a capacitor and starting switch. When the motor is first energized, the starting switch is closed. This places the capacitor in series with the auxiliary winding. The capacitor is of such value that the auxiliary circuit is effectively a resistive-capacitive circuit (referred to as capacitive reactance and expressed as XC). In this circuit the current leads the line voltage by about 45° (because XC about equals R). The main winding has enough resistance-inductance (referred to as inductive reactance and expressed as XL) to cause the current to lag the line voltage by about 45° (because XL about equals R). The currents in each winding are therefore 90° out of phase - so are the magnetic fields that are generated. The effect is that the two windings act like a two-phase stator and produce the rotating field required to start the motor. When nearly full speed is obtained, a centrifugal device (the starting switch) cuts out the starting winding. The motor then runs as a plain single-phase induction motor. Since the auxiliary winding is only a light winding, the motor does not develop sufficient torque to start heavy loads. Split-phase motors, therefore, come only in small sizes.
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Accuracy because it tells us how close our value is to the accepted/expected value rather than precision that only describes reproducibilty and closeness of results to One another.
What are the main function of headstock in a Centre lathe?
The basic functions of the headstock are:
Shackles are steel connectors made from a body and a pin.
A shackle, also known as a gyve, is a U-shaped piece of metal secured with a clevis pin or bolt across the opening, or a hinged metal loop secured with a quick-release locking pin mechanism. The term also applies to handcuffs and other similarly conceived restraint devices that function in a similar manner.
Shackles are the primary connecting link in all manner of rigging systems, from boats and ships to industrial crane rigging, as they allow different rigging subsets to be connected or disconnected quickly. A shackle is also the similarly shaped piece of metal used with a locking mechanism in padlocks.
Types:
Bow Shackle
With a larger "O" shape to the loop, this shackle can take loads from many directions without developing as much side load. However, the larger shape to the loop does reduce its overall strength. Also referred to as an anchor shackle.
D-Shackles
Also known as a chain shackle, D-shackles are narrow shackles shaped like a loop of chain, usually with a pin or threaded pin closure. D-shackles are very common and most other shackle types are a variation of the D-shackle. The small loop can take high loads primarily in line. Side and racking loads may twist or bend a D-shackle.
Pin Shackles
A pin shackle is closed with an anchor bolt and cotter pin, in a manner similar to a clevis. It is for this reason they are often referred to, in industrial jargon, as clevises. Pin shackles can be inconvenient to work with, at times, as the bolt will need to be secured to the shackle body to avoid its loss, usually with a split pin or seizing wire. A more secure version used in crane rigging features the combination of a securingnut (hardware) located alongside the cotter pin. Pin shackles are practical in many rigging applications where the anchor bolt is expected to experience some rotation.
Snap Shackles
As the name implies, a snap shackle is a fast action fastener which can be implemented single handedly. It uses a spring activated locking mechanism to close a hinged shackle, and can be unfastened under load. This is a potential safety hazard, but can also be extremely useful at times. The snap shackle is not as secure as any other form of shackle, but can come in handy for temporary uses or in situations which must be moved or replaced often, such as a sailor's harness tether or to attach spinnaker sheets. Note: When this type of shackle is used to release a significant load, it will work rather poorly (hard to release) and is likely to have the pin assembly or the split ring fail.
Twist Shackles
A twist shackle is usually somewhat longer than the average, and features a 90° twist so the top of the loop is perpendicular to the pin. One of the uses for this shackle include attaching the jib halyard block to themast, or the jib halyard to the sail, to reduce twist on the luff and allow the sail to set better.
Is zinc plated galvanized steel magnetic?
Yes, the mild steel under the plating is magnetic. The coating only prevents corrosion.
How much wattage is a 300 ampere welds?
There are zero watts in 300 amps. Watts are the product of amps times volts.
What is D code in cnc machine?
The D-code on a CNC is used for the tool diameter offset number. This number is programmed in to CNC and basically tells it where the tip of a specific cutting tool is located.
Why is the spindle on the lathe hollow?
The hollow spindle of a lathe allows for longer lengths of material to be held in the chuck thus eliminating constant material changing to and from the lathe in production turning. The best advantage is the saving in material costs. If one had to manufacture 20 bushings and they were all cut into separate billets, half of the material would be lost because the chuck needs some material to grip the work piece on.
If for example 20 bushings of 50mm OD by 50mm long have to be made, one would need a piece of material of at least 1150mm long. A single shaft or hollow bar of this length can usually be stuck into the hollow spindle with only enough material sticking out to make one or two bushings at a time. Once they are parted off, the material can simply be pulled out and the next one or two bushings can be machined. In the end the wastage will only be a piece of material of 70mm long instead of 20 pieces of 40 or 50mm long without a hollow spindle.
HYBRID MACHINING, AS FAR AS OUR MANUFACTURING OF FASTNERS MACHINERY TO MAKE A SINGLE PRODUCT OUT OF TWO OPERATIONS OR TWO DIFERENT RAW MATERIAL IS CALLED AS HYBRID MACHINING egsample BIOMETAL RIVET.
What is the function of a tool room lathe?
There are a number of different types of lathe. We usually separate them out by whether they are for wood or metal (and other stuff like plastic). The things is, they all do essentially the same thing: they turn a workpiece between two centers and allow the user to apply a tool to remove material from the rotating mass of "stuff" being worked, or, as is said by those involved, turned. The earliest lathes did thi - turned the work so a tool could be used on that material. And we do it pretty much the same way today. The metal lathe most often has a chuck on the headstock (the driven end) in which work can be clamped, and this affords an "open end" on the material so it doesn't have to be supported at the "tail end" of the lathe to work the material. (You aren't turning between centers.) A number of metal lathes are computer controlled (the so-called computer numeric controlled or CNC machines), and they can do a lot of things very quickly and with a high degree of accuracy. And all if it is repeatable. Need some pistons made for your engine? We can do that. Many wood lathes have a faceplate attachment that a wood turner can affix a chunk of wood to so he can turn, say, a bowl. That way the wood can be supported on just the one end and the bowl can be hollowed out. There are lots of wood turners out there, and they make some fabulous stuff. We often say, "I'm turning (something) on a lathe." It could be a wooden bowl to mix pie dough in or a rolling pin for rolling out that pie dough. Certainly it could be any one of a zillion machined parts for aircraft or automotive applications, or just about anything else. There are a lot of things we use every day that have been turned on a lathe, though many of them may not be where we can see them, like a number of engine parts in a car. The largest part of the lathe (almost always) is the bed of the machine. It is the "frame" onto which the headstock and the tailstock are fastened. The headstock has in it the rotating (driven) spindle on which a chuck or faceplate can be fastened. On the bed, the top of it is generally machined to create the ways on which the tool rest or (in the case of a metal lathe) the carriage(with its cross slide and tool post) can sit and move precisely along the length of the bed. There are some other parts and a host of attachments to the lathe. Pictures may very well help you see things. Links are provided to the Wikipedia articles on the lathes, and a link is provided to some "lathe" video clips put up on YouTube. There are a lot(!) of short posts there on lathe work. Check a few out.
What are the MIG welding safe working practices?
A few broad areas for your consideration-
ELECTRICAL safety- when using any electrical equipment
THERMAL safety- when working with hot items
EYE and FACE safety- working with things that spatter. or produce ultraviolet light that can burn your eyes
RESPIRATORY safety- breathing fumes from welding is very unhealthy
FIRE safety- you can set things on fire
MATERAIL HANDLING safety- cuts and strains/sprain when moving heavy or sharp items
Why this cnc machines are used?
the cnc technology is applicable for high accuracy machining and high speed machining,it si more efficient than the conventional methods like lathe,driller,etc..by the application of cnc the production time can be reduced and there by increase the productivity and profit .
tool post is used to handle the tool on the lathe machine
Can you weld a cracked cast iron pot belly stove?
yes, with a cast iron rod and an oxy-fuel set up or with a nickel rod and an arc machine