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Where is a bevel gear used in everyday machines will be available soon

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of my latest videos hey guys welcome

back to aim mi so guys in this video we

are going to learn about the gear

cutting operations and the types of the

Garan all the terminologies we'll learn

in this video so so guys the basic

purpose and the use of the gears so the

gears are widely used in various

mechanisms and devices to transmit power

and motion that is positively without

slipping it transmits the power and

motion between the parallel intersecting

axis or non intersecting and non

parallel shafts so the transmit power

power and motion without changing the

direction of the rotation or with change

in the direction of the rotation it also

transmits the power and motion without

the change in the direction of the

change of the speed or rotation or with

change in speed at any desired ratio the

next one is the categories of gear

manufacturing process so guy is the the

gear manufacturing process is widely

distributed in two stages this is the

first one is the forming and the next

one is the machining so in forming we

have casting sintering injection molding

extruding cold drawing stamping

performing and forging so as these are

all comes under the forming process in

case of Muslim motioning we got a

roughing finishing for milling shaving

regeneration grinding gear shaping

burnishing hopping lapping and honing so

guy slapping and honing these are the

super finishing processes in which the

very less and negligible tolerance is

used the next one is the general

applications of the girls so guys the

gears are most commonly and widely used

such as in case of the speed gearbox

free gear boxes and some other kinetics

units of the machine tools the speed

drives in textiles jute and other

similar machineries the gearboxes of

automobiles

speed and free drives of the several

metal forming machines in case of

machineries and mining machineries for

mining in which the large not require T

processing etc large and heavy duty

gearboxes used in cement industries

sugar industry skins conveyors etc in

case of precision instruments clocks and

watches in case of industrial robots and

toys it is used so these are the

applications of the gas the next one is

the types of the gear and their

characteristics so according to the

configuration the gears are some of the

gears of external gear and internal gear

as shown in this figure this a shows

these are the two external gears and

figure B shows the internal gear the

next one is according to the axis of

transmission the spur gear the spur gear

transmits the rotation between the

parallel shafts as shown in this - these

are the straight toots or it can be

helical tooth such as single helical and

double helical so guys figure a shows us

the two spur gear that is the small and

the larger one having the two parallel

shaft okay which are having the straight

tooth so guys this one is the figure a

show the straight tooth spur gears

figure B shows us the helical tooth spur

gears this is having the angular

formation in the tooths okay so this is

the single helical guy's figure B is the

single helical okay and the next one is

the C that is the double helical which

is also known as the herringbone gear so

guys figure she shows us the herringbone

calluses is having the two degrees of

helical tooth gear the next one is

according to the pattern of the motion

that is the rotation - rotation that is

the wheel type gear that can be the

rotation - translation or vice versa and

rack and pinion that is of the straight

tooth and helical tooth so guys the

first one a shows us this rotation -

rotation

this smaller gear rotates the another

bigger gear that is the according to the

pattern of motion that is rotation to

rotation means smaller gear rotates than

bigger gear okay the next one is B that

is from rotation to translation so guys

whenever translation motion comes the

translation motion is nothing but the

our linear motion that is the

reciprocating motion that is the rotary

motion of the opinion gets converted

into the reciprocating moment of the

cran which is normally used in baybridge

so guys over here we have got this a

over here rotation - rotation moment is

transferred so guys figure B or in

Figure XI this shows us this bevel gears

this is of the straight tooth spiral and

so guys the next one is the types of

gear cutting operations so the gear

milling or forming gear shaping they are

hopping and you're finishing so guys in

gear milling and forming the gear

milling operation is used for gear

cutting all types of the gears can be

made by using gear milling all types

angles all types by gear milling

so guys milling cutter is selected

specifically for particular type of the

gear or module the periphery of the gear

blank is divided into the required

number of the equispaced parts okay

the required number of the parts should

be equal to the number of the teeth to

be made on the gear blank the method of

dividing the periphery is called

indexing which is an integral part of

operation of gear milling so what is the

next one is the gear milling in gear

form in gear form cutting the cutting

edge of the cutting tool has a shape

identical with the shape of the space

between the gear teeth okay

as shown in this figure this guy's the

cutter is having the shape cutting edge

shape of the cutting tool which is which

is like the shape between the gear teeth

so guys over your gear shank gear blank

is the over here

this is the gear milling so guys the

cutter rotates cutter rotation rotates

that is the form vector rotates okay and

along with the indexing after each cut

is carried out so guy is the gear blank

that is the fluid along with the tool

okay guys so guys in this case the gear

blank that is of the circular feeding

and he same the cutter also rotates so

wise in this image you can clearly see

in this cutter is mounted on the arbor

okay and it cuts the workpiece as per

the requirement so guys the next one is

the disadvantages of the gear milling so

guys the gear milling is a slow process

of the gear generation as compared with

the other generation processes so guys

it takes time by this process the gear

is generated by the cutting one by one

to toe so gears are to be made it is not

suitable for the larger batch size so

guys the other methods required very

high capital cost and set-up cost as

compared to the gear milling so these

are not economical for smaller batch

size only gear cutting by milling

operation is recommended for smaller

batch sizes so guys the next one is the

gear shaping gear shaping is used as a

cutting tool in the shape of gear which

is reciprocated axially across the gear

blank to cut the teeth while the blank

rotates around a shaper tool so guys it

is a true shaped generation process in

which the gear shape tool cuts itself

into the mesh with the gear blank as the

shown in figure so guys the accuracy is

good but any errors in one of the tooth

of the shaper cutter will be directly

transfer transferred to the gear so

internal gears can be cut with this

method as well so guys the shaping with

the pinion shaped cutter

so guys pinion shaped cutter over here

this the cutter is having the stroke

mechanism so guys over here this cutter

reciprocals

in the gear blank which is mounted on

the cutter spindel okay guys the field

is generally provided to the gear blank

which is the speed ratio is normally

very much slower than that of the stroke

motion so guys this is the work spindle

and on walk spindle over here or gear

blank is mounted and this cutter spindel

continuously reciprocate okay in gear

blank also guys there is this is the

process of the gear cutting by shaper

cutter also guys this work spindle

rotates which is the field of rotation

is very much smaller than that of the

cutter spindel also there is this also

stroke mechanism also there and this

cutter spindel also rotates in normally

anti-clockwise direction whereas the

feed rotates in the clockwise direction

so this was the guys escaping with the

pinion shaped cutter so guys next is the

gear shaping machine so guys we have got

this setup for gear shaping machine so

guys over here we have got ready stop

that is the motor and from which is the

general if the power and the motion is

transmitted we have got the spindle head

upon which the cutter spindell is

mounted and upon that cutter spindel the

cutter is mounted okay guys we have got

this work table gear blank which is the

circular gear rush circular disc or or

else we can call it a circular or

workpiece and this is the work spindle

the cutter simultaneously cutting cutter

simultaneously cuts the work gear blank

in this gear shaping machine the next

one is a shaping with a crack shaped

cutter so guys the shaping also with the

help of the rack shape cutter so guys we

all know the beyblade this is just like

similar to the beyblade okay we have got

who your rack type cutter which

reciprocate which reciprocate also it is

having the length of the rags this is

like reciprocity

also if they're having the vertical

moments also similarly this is the

rotation of the gear blanks which is

mounted on the work spindle so guys this

is a process which is known as so

shaping with the rack shaped cutter so

guys the next one is the gear hopping so

gear hoping is generally and the widely

used in our into all the industries so

gear hopping is the machining process in

which the gear teeth are progressively

generated by a series of cuts with the

helical cutting tool which is nothing

but the hog so guys all the motions in

hobbing are rotary and the hob and the

gear blank rotate continuously okay guys

the hob and the gear blank rotate

continuously as the two gears missing

until all tits are cut so guys this is

the gear hopping so over here gear blank

we have and over here we have this hog

and we have got this feed along the gear

teeth

this is our all the cutters which are

mounted over here on the hub so over

here the gear blank also rotates and

similarly this hog also rotates so this

is guys just the setup for the gear

hopping operation so there's this in

this image as well you can clearly we

can clearly shown how this the hopping

operation takes place so guys the next

one is this is also the same guys this

is also the gear hub and this is also

the gear on this gear blank this is the

axis of the rotation which is shown and

this is also the process of the guy

robbing which is shown guys so the hub

is mounted and the feed is provided to

the hob also the guys there is the axis

of the rotation in the workpiece that is

nothing but the gear blank so as this is

the process of care hobbing I hope you

understand this guy's gear finishing and

the last one is the gear finishing so as

produced by any of the process describe

the surface finish and a dimensional

accuracy may not be accurate enough to

certain application

okay so guys in several application may

require the sorter finishings so guys

did not that might not be occurred

accurate enough for the certain

applications

so as the several finishing operations

are available including the conventional

processes of shaving and a number of the

abrasive operation including a grinding

Horning lapping and shaping so guys I

have stated before this honing and the

lapping are the super finishing

processes where the high dimensional

accuracy is obtained so why is that

these are the gear finishings and the

last one is the grinding so grinding in

which the abrasive grinding wheel is

rotated inside the grinding geared heat

so guys this is the grinding operation

which is carried out in the gear tooth

and the last one is the happy lapping

and honing so guys in this the lapping

and honing are the super finishing

processes so as where the high

dimensional accuracy we can obtain and

the last one is the gear shaving so guys

the gear shaving image the while the

interacting with the gears the gear

teeth of the shaving cutter keeps on

smoothing and the mating gear flanks by

fine machining and high accuracy and the

surface finish so this is the game gear

shaving so guys thank you for watching

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