Honing Tecnology

8/7/2019 Honing Tecnology

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TERM PAPER

HONING TECHNOLOGY

NAME: KISHAN KACHHAP

B4003

11013344

Roll no. : A76

LOVELY PROFESSIONAL UNIVERSITY


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ACKNOWLEDGEMENT

Myself kishan kachhap student of B.Tech (ME)1st year, First of

all I would like to thank the Almighty God, without his help

nothing could be done. Then I would like to thank my parents

who are so supportive. I am grateful to the faculty of lovely

professional university and I would like to thank my teacher, who

have funded for this term paper and offered timely instructions to carry

out the study. I particularly acknowledge the services ofMr. DIGVIJAYSINGH, who processed my papers and gave instructions without anydelay.

This is to certify thatI am submitting this term paper of MANUFACTURING of thegiven Topic. I would like to thank the people who have entirelyassisted me with my Project.


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CONTENTS:

1. Introduction To HONING TECHNOLOGY2. Definition of HONING TECHNOLOGY3. DISCLOSURE4. HONING PROCESS5. HONING TOOLS AND MACHINES6. TYPES OF HONING

a) MACHINE HONING

b) STONE HONINGc) JIG HONINGd) GEAR HONING

7. ADVANTAGES8. Reference


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HONING

Honing process is used to precision size many types of components including

cylinder bores, hydraulic cylinders, and similar parts. The honing machine consists of fine

grain abrasive stones attached to an expandable mandrel that is then slowly rotated and

oscillated inside the cylinder bore. This operation is performed under an oil bath for

lubrication and heat control until the desired finish and diameter are obtained

Honing is a final finishing operation conducted on a surface, typically of an inside cylinder,

such as of an automotive engine block. Abrasive stones are used to remove minute amounts

of material in order to tighten the tolerance on cylindricity. Honing is a surface finishoperation, not a gross geometry-modifying operation. Hones can be of the multiple pedal

types or the brush type. Either type applies a slight, uniform pressure to a light abrasive that

wipes over the entire surface.

Typical applications are the finishing ofcylindersforinternal combustion engines,air

bearingspindles and gears. Types of hone are many and various but all consist of one or

more abrasive stones that are held underpressureagainst the surface they are working on.

HONING PROCESS

Honing process with rough honing tool and finish honing tool on same

rotating head: - A two honing process eliminates the need for subsequent brush honing at

another location. The honing process which is accomplished with a single head uses rough

honing stones or tools for the initial phase, and finishing tools of tightly compacted abrasive

containing plastic monofilaments for the second phase. The phases may be contiguous,

slightly spaced, or preferably overlap for up to about one-half of the rough honing phase.
http://en.wikipedia.org/wiki/Cylinder_(engine)http://en.wikipedia.org/wiki/Cylinder_(engine)http://en.wikipedia.org/wiki/Internal_combustion_engineshttp://en.wikipedia.org/wiki/Air_bearinghttp://en.wikipedia.org/wiki/Air_bearinghttp://en.wikipedia.org/wiki/Air_bearinghttp://en.wikipedia.org/wiki/Spindlehttp://en.wikipedia.org/wiki/Gearhttp://en.wikipedia.org/wiki/Abrasivehttp://en.wikipedia.org/wiki/Pressurehttp://en.wikipedia.org/wiki/Pressurehttp://en.wikipedia.org/wiki/Internal_combustion_engineshttp://en.wikipedia.org/wiki/Air_bearinghttp://en.wikipedia.org/wiki/Air_bearinghttp://en.wikipedia.org/wiki/Spindlehttp://en.wikipedia.org/wiki/Gearhttp://en.wikipedia.org/wiki/Abrasivehttp://en.wikipedia.org/wiki/Pressurehttp://en.wikipedia.org/wiki/Cylinder_(engine)


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When the finishing honing tools are operating alone, the angle of movement of the tools is

somewhat askew of the oil retaining ridges and grooves formed by the rough honing

operation. With the process, the oil bearing surfaces have improvements in plateau finish and

surface topography, avoid abrasive contamination caused by hard finishing tools, and obtain

such improvements in a more economic manner.

DISCLOSURE

This invention relates generally as indicated to a honing process associated with sliding

sealed surfaces; such as, internal combustion engine cylinders and liners, hydraulic and

pneumatic cylinders and other internal machined, bored, drilled and reamed surfaces. In

particular it relates to a two-step honing process which eliminates the need for conventional

finish honing stones, and also any subsequent brush honing operation. A somewhat yielding,

tightly packed abrasive monofilament tool is used in lieu of the conventional finish honing

stones or steel tools, and the two steps are performed at a single station.

HONING METHOD AND HONING CONTROL DEVICE

A honing method and honing control device suitable for the honing having a large processing

area is provided. The honing control device includes a grinder and an expansion member for

disposition in a processing hole of a work piece. The amount of an expanding movement

when the grinder contacts the inner surface of a gauge hole via the expansion member is

stored as a target expansion amount by inserting a honing head into the gauge hole having the

same size as a target processing diameter of a master gauge. Then, a honing of an inner

surface of the processing hole is performed by inserting the honing head within a processing


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hole of a work piece moving the grinder towards an outer side of a diametrical direction by

the expansion member installed within the honing head to rotate the honing head. The honing

is completed when the amount of the expanding movement of the grinder reaches a target

expansion amount established by the master gauge.

HONING TOOLS

A honing tool has a large-diameter portion thereof provided with a plurality of stone holding

recesses arranged radically from the inner bore to the outer edge for slid ably holding

grinding stones. Each stone holding recess is arranged to form an upper guiding facet and a

lower guiding facet at the top side and the bottom side thereof, respectively as well as a

couple of side guiding facets at both sides thereof. Also, each grinding stone has an upper

sliding facet and a lower sliding facet provided at the top side and the bottom side thereof,

respectively for sliding directly on the upper guiding facet and the lower guiding facet. Both

sides of the grinding stone are side sliding facets for running directly on the side guiding

facets. Moreover, the grinding stone has a tapered facet provided on an upper end thereof at

the inner bore side for receiving a pressing force of a tapered rod. Accordingly, the grinding

stone is stably held at four sides and can be slid without any jerky movement while being

driven for rotating and reciprocating actions as pressing against the inner surface of a work

piece.

A rotary honing tool includes a rotatable body member mounted on a shaft and having

attached rotatable honing arms as well as a band or collar fitted about the body. The collar is

engaged with the body by means of a lug on the collar fitted into a channel on the outside

face of the cylindrical body. The collar may be rotatably displaced to control radial extention

of the honing arms.


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MACHINES HONING

A honing machine for close tolerance sizing of a cylindrical bore in a work piece such as an

internal combustion engine block includes a table for supporting the work piece with its

cylindrical bore in vertical alignment and a vertical tower structure spanning the table and

supporting a trolley for reciprocal movement motor means for driving the honing head being

suspended from the trolley by a gimbal mounting. The honing machine is preferably adapted

for manual operation, a manual lever and adjustable fulcrum being interconnected together

between the vertical tower and trolley for controlling the reciprocating stroke of the honinghead, and adjustable stop limiting the downward stroke of the honing head with the weight of

the trolley, motor and honing head being counterbalanced to facilitate reciprocating

movement of the honing head.


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HONING MECHNISM

A honing mechanism for honing blades which includes a pair of honing wheels mounted on

carriages for movement in a direction toward and away from each other between an operating

or honing position and a dressing position. Each honing wheel is driven by a cog belt from a

sprocket, and the sprockets are splined to a drive shaft, so that as the honing wheels are

moved between the honing position and the dressing position the sprockets will move along

the splined drive shaft to maintain the proper tension on the drive belt. A dressing mechanism

is incorporated which acts to remove a controlled amount of the surface of each honing wheel

when in the dressing position and to return the honing wheels to the proper grinding position

by automatically compensating for the amount removed from the surfaces of the wheels

during the dressing operation.

PROCESS OF BRUSH HORNIG


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HONING JIG

The honing jig has a base on which a whetstone or other abrasive substance is mounted. A

pair of spaced guide rods extends the length of the base. A carriage is mounted to tubes which

slide along the rods and through which the guide rods extend. The blade to be sharpened is

held to the carriage by a clamp and the clamp swivels on the carriage to allow the inclination

of the blade relative to the whetstone to be adjusted. The angle of the guide rods can be

adjusted to permit fine adjustment of the inclination of the blade.

CYLINDER HONING

A cylinder truing hone comprising a plurality of pressure members mounted in

circumferentially spaced locations around a driven member for movement radially of the

driven member and with pressure surfaces on the pressure members outermost. An axially

movable cam on the driven member is in engagement with the pressure members and can

move them outwardly. Abrasive coated sheet material extends over the pressure surfaces

where it can be pressed into engagement with a cylindrical inner surface by movement of the


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cam, and a mechanism is provided for changing the portion of the abrasive coated sheet

material extending over the pressure surfaces.

STONE HONING

Honing uses a special tool, called a honing stone or a hone, to achieve a precision surface. An

improved honing stone which minimizes the vibrations to which the abrasive material is

subjected during the honing process. The improved stone has a hole formed in a dead zone

thereof. A piece of resilient material is forced into the hole. When the stone is inserted into

the honing machine, the resilient material retains and cushions the stone within the machine.

Any abrasive material may be used to create a honing stone, but the most commonly used

are corundum,silicon carbide,cubic boron nitride, ordiamond. The choice of abrasive

material is usually driven by the characteristics of the work piece material. In most cases,

corundum or silicon carbide are acceptable, but extremely hard work piece materials must be

honed using super abrasives.

The hone is usually turned in the bore while being moved in and out. Special cutting

fluids are used to give a smooth cutting action and to remove the material that has been

abraded. Machines can be portable, simple manual machines, or fully automatic

withgauging depending on the application
http://en.wikipedia.org/wiki/Corundumhttp://en.wikipedia.org/wiki/Corundumhttp://en.wikipedia.org/wiki/Silicon_carbidehttp://en.wikipedia.org/wiki/Cubic_boron_nitridehttp://en.wikipedia.org/wiki/Cubic_boron_nitridehttp://en.wikipedia.org/wiki/Diamondhttp://en.wikipedia.org/wiki/Diamondhttp://en.wikipedia.org/wiki/Cutting_fluidhttp://en.wikipedia.org/wiki/Cutting_fluidhttp://en.wikipedia.org/wiki/Gauge_(engineering)http://en.wikipedia.org/wiki/Gauge_(engineering)http://en.wikipedia.org/wiki/Corundumhttp://en.wikipedia.org/wiki/Silicon_carbidehttp://en.wikipedia.org/wiki/Cubic_boron_nitridehttp://en.wikipedia.org/wiki/Diamondhttp://en.wikipedia.org/wiki/Cutting_fluidhttp://en.wikipedia.org/wiki/Cutting_fluidhttp://en.wikipedia.org/wiki/Gauge_(engineering)


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GEAR HONING

The method of honing gears which comprises placing the first gear of a first series of gears in

tight mesh with a gear like hone in new condition so as to have a predetermined clearance

between the crests of the hone teeth and the bottom of the spaces between gear teeth, and thus

establishing an initial position to be occupied by the first gears of successive series of gears,

rotating the gear and hone in tight mesh under light pressure contact to finish the side profiles

of the teeth of the gear while material is worn away from the sides of the hone teeth while

maintaining the hone in a fixed position. Repeating the process with successive gears in the

first series while reducing the centre distance between the hone and successive gears to

maintain tight mesh as material is removed from the sides of the hone teeth until the crests of

the hone teeth approach an interference condition in which they would bottom in the spaces

between gear teeth.

At this time

the honing operation on the first series of gear teeth is terminated and the hone is either

replaced with a new hone or is reconditioned by removing material from the crests of the

teeth. In either case, substantially the same clearance is introduced between the crests of

the hone teeth and the bottom of the spaces between gear teeth of the first gear of the second

series. Thereafter, the cycle is repeated on the multiplicity of gears constituting the secondseries until sufficient material is worn away from the sides of the hone teeth to cause

approach to the aforesaid interference condition.

ECONOMICS

Since honing is a high precision process, it is also relatively expensive. Therefore it is only

used in components that demand the highest level of precision. It is typically


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the last manufacturing operation before the part is shipped to a customer. The dimensional

size of the object is established by preceding operations, the last of which is usually grinding.Then the part is honed to improve a form characteristic such as roundness, flatness,

cylindricity\

.

ADVANTAGES OF HONED SURFACE

Since honing is a relatively expensive manufacturing process, it can only be economically

justified for applications that require very good form accuracy. The improved shape after

honing may result in a quieter running or higher precision component.


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REFRENCES

1. http://en.wikipedia.org/wiki/Honing_(metalworking)#Performance_advanta

ges_of_honed_surfaces

2. http://www.neugartusa.com/Service/faq/gear_honing.pdf

3. http://suppliers.jimtrade.com/99/98757/37787.htm

4. http://www.antiquetools.com/sharp/

5. http://www.deepmayaengineering.com/

6. http://www.dgrin.com/showthread.php?

s=590c2862fa6ec2b1715c79181086f03a&p=1380012#post1380012

7. http://www.physorg.com/news132151987.html

8. http://www.ehow.com/how_4727370_hone-cylinder.html

9. http://en.wikipedia.org/wiki/Sharpening_stone
http://www.neugartusa.com/Service/faq/gear_honing.pdfhttp://suppliers.jimtrade.com/99/98757/37787.htmhttp://www.antiquetools.com/sharp/http://www.deepmayaengineering.com/http://www.dgrin.com/showthread.php?s=590c2862fa6ec2b1715c79181086f03a&p=1380012#post1380012http://www.dgrin.com/showthread.php?s=590c2862fa6ec2b1715c79181086f03a&p=1380012#post1380012http://www.physorg.com/news132151987.htmlhttp://www.physorg.com/news132151987.htmlhttp://www.ehow.com/how_4727370_hone-cylinder.htmlhttp://www.ehow.com/how_4727370_hone-cylinder.htmlhttp://en.wikipedia.org/wiki/Sharpening_stonehttp://www.neugartusa.com/Service/faq/gear_honing.pdfhttp://suppliers.jimtrade.com/99/98757/37787.htmhttp://www.antiquetools.com/sharp/http://www.deepmayaengineering.com/http://www.dgrin.com/showthread.php?s=590c2862fa6ec2b1715c79181086f03a&p=1380012#post1380012http://www.dgrin.com/showthread.php?s=590c2862fa6ec2b1715c79181086f03a&p=1380012#post1380012http://www.physorg.com/news132151987.htmlhttp://www.ehow.com/how_4727370_hone-cylinder.htmlhttp://en.wikipedia.org/wiki/Sharpening_stone

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Honing Tecnology