Flat Blade Screw Driver For Electrical Applications Engineering Essay

Flat Blade Screw Driver For Electrical Applications Engineering Essay

Introduction

The purpose of this undertaking was to build a level blade screw driver for electrical applications. This assignment was to be completed in six three hr Sessionss over a period of nine hebdomads. Upon completion of this exercising one would hold learnt assorted workshop accomplishments and most significantly awareness in the workshop, due to exposure to a assortment of machines and techniques used in the fabrication procedure. This is of import because as future applied scientists we need to be all rounded in all applications and though this exercising may non be exactly our field of technology it is still of import to go acquainted with these types of procedures.

Work Shop Overview

In order to build the screwdriver a assortment of machines and tools were used to fix and determine assorted parts of the prison guard driver.

Vee BlockListed below are these Machines and their Pictures: –

Bench Vice

Hacksaw

Height GaugeHammer

Band Saw

Wood Chisels

Milling Machine

Outside Calliper

Arbor Press

Metal Turning Lathe

Disc Sander

( Top ) Niping Hammer ( Left ) Weld Lead ( Right ) Mild Steel Welding Rod

Boring Imperativeness

Description of Operation and Safety Warnings of Machines

Metal Turning Lathe

Operation

This is used to take unwanted stuff from a work piece. This is done by attaching the work piece to a chow and puting it to a desired R.P.M. bore spots and other film editing tools are used to take the unwanted stuff.

Safety

Safety goggles must be worn to protect user ‘s eyes from winging metal during operation.

Loose pieces of vesture must non be worn during operation. Safety jacket must be worn.

Tools and flammable stuffs must non be stored or placed on or shut to machine while it is in usage.

Wood Turning Lathe

Operation

This is used to determine and cut wood by revolving the wood to be cut /shaped at a coveted R.P.M while the user moves the cutting tool ( chisel ) along the piece.

Safety

Safety goggles must be worn to protect user ‘s eyes from winging wood french friess during operation.

Loose pieces of vesture must non be worn during operation. Safety jacket must be worn.

Tools and flammable stuffs must non be stored or placed on or shut to machine while it is in usage.

A dust mask must be worn during operation to protect the user from inhaling finer atoms.

Boring Imperativeness

Operation

This is used to bore holes in assorted stuffs by agencies of a rotating drill spot tiring into the stuff.

Safety

Safety goggles must be worn to protect user ‘s eyes during operation.

Loose pieces of vesture must non be worn during operation. Safety jacket must be worn.

Tools and flammable stuffs must non be stored or placed on or shut to machine while it is in usage.

Whilst boring, drill spot must be sporadically removed after tiring a short distance into stuff in order to clear spot and hole from filings.

Milling Machine

Operation

This is used to determine and cut solid stuffs. The work piece is attached to a revolving chow whilst a revolving cutting device moves over the piece bring forthing coveted coating.

Safety

Safety goggles must be worn to protect user ‘s eyes during operation.

Loose pieces of vesture must non be worn during operation. Safety jacket must be worn.

Tools and flammable stuffs must non be stored or placed on or shut to machine while it is in usage.

Arbor Press

Operation

This is used for pressing and fitting work pieces together such as concentrating. It is a manual machine where force is applied to its grip, which in bend exerts a downward force on the work piece.

Safety

Safety goggles must be worn to protect user ‘s eyes during operation.

Care must be taken to decently aline pieces before using any force.

Disc Sander

Operation

This is used to smooth wood pieces by pressing it against a revolving scratchy phonograph record.

Safety

Safety goggles must be worn to protect user ‘s eyes during operation.

Loose pieces of vesture must non be worn during operation. Safety jacket must be worn.

A dust mask must be worn during operation to protect the user from inhaling finer atoms.

Welding Machine

Operation

This is used to weld together two or more pieces of metal. The lead comes into contact with the metal where the high current creates a flicker which is called the welding fire.

Safety

A welding mask must be worn to protect eyes.

Welding baseball mitts must besides be worn to protect custodies from heat and flickers.

The user must clearly state ‘eyes ‘ before doing contact with the metal.

Safety goggles must be worn when come offing.

No flammable stuff must be stored near to welding table and safety jacket must be worn.

Procedure Plan

Several stairss were used in the building of this level blade screw driver. They are: –

Construction of the blade

Construction of the grip

Construction of the neckband

Assembly of constituents

Installation of pin

Machining of channels in grip

Polishing of prison guard driver.

Construction of the blade

A piece of austenitic chromium steel steel rod was provided, from which a length of 212mm was measured and marked off utilizing a lasting marker. A scratch awl was so used to tag off exactly the length of 212mm. The rod was so clamped in a bench frailty and cut at that length utilizing a drudge proverb.

The tip of the rod was so forged to obtain the level blade ( see Fig1 & A ; 2 in appendix ) . This was done utilizing an oxy-acetylene blow torch, to heat one terminal boulder clay ruddy hot, after which the tip was hammered to flatten it ( see Fig3 in appendix ) . Upon making coveted form the tip was submerged in H2O at room temperature to chill it.

After chilling the now planate tip was coloured with a lasting marker and placed onto a vee-block with the planate side perpendicular to postpone top. Then the upper and lower tallness of the prison guard driver caput from the tabular array were measured and recorded utilizing the height gage. These values were so used to cipher the center of the blade.

Once found, the scribed border of the height gage was so used to tag the center on both sides of the screwdriver caput, after which all other dimensions were marked onto the blade. Using these lines as mention, a file was so used to register down the extra metal from the caput. Care was taken non to go through the scribed lines and to register analogue to the borders of caput.

Construction of the Handle

A block of teak wood with dimensions of 4.5cm ten 4.5cm ten 15cm was provided. Diagonals were so drawn utilizing a Miter combination square and pencil, on both of the 4.5cm x 4.5cm sides. After which a Tennon proverb was used to cut channels at about 2mm deep into the drawn diagonals.

The block was so locked into the wood turning lathe, and spun at about 1000 R.P.M. The separating chisel was so used to change over the block into a cylinder whilst the outside caliper was used to sporadically look into diameter of the grip.

The grip was so marked with a pencil along assorted points utilizing a stencil. After which assorted chisels ( see Fig4 in Appendix ) were used to bring forth the coveted form of the grip to rectify dimensions. In completing a unsmooth 120 class emery paper followed by the finer 320 class emery paper were used to smoothen grip. Finally extra pieces of wood were cut off from the grip utilizing the Tennon proverb after which the grinding phonograph record followed by both classs of emery paper were used to smoothen and take any staying defects.

Construction of the Collar

A length of galvanised pipe of diameter 26mm was provided. The pipe was so fitted into a metal turning lathe after which the tailstock was so moved so that the 15/16 inch drill spot was about 0.5 inches off from the neckband.

The lathe was so switched on and the passenger car manus wheel was turned clockwise so that the drill spot bored into the pipe a short distance, after which the wheel was turned anti clockwise so that the drill spot could be cleared and PC10 fluid which acts as a coolant and lubricating agent could be applied.

This procedure was continued until an interior diameter of 24mm and a length of neckband of 15mm was produced with an extra subdivision of diameter 25mm on one terminal. This was to function as a stopper which would forestall the neckband from skiding when assembled.

Assembly of Components

First the neckband was pressed into the grip utilizing an Arbor imperativeness, after which the blade and grip were mounted onto a metal turning lathe, where the blade was somewhat pressed into the grip. This was done in the lathe to guarantee that the blade was mounted into the grip horizontally. Finally utilizing the Arbor imperativeness, the blade was pushed into the grip to the coveted length.

Installation of Pin

A cock and pin were foremost used to do a little indent on neckband. Using this as a mention the prison guard driver was placed into a boring imperativeness which had a drilling spot of 1/16 inch. Drilling was done bit by bit with the spot being removed sporadically so as to take shaves and to use Personal computer lubricating fluid.

After hole was produced a pin of length 28mm was inserted and both stick outing terminals were flared with a cock. In completing the flared terminals were sanded utilizing foremost a file so emery paper.

Machining of Grooves on Handle

The screwdriver was placed into the chow of the Elliot Milling Machine which is used to bring forth horizontal channels. The chow consists of 60 every bit spaced divisions. Machining was done at every 15th division in order to guarantee equal spacing of channels.

A convex shaped individual lathe tool spot ( fly cutter ) was used to cut concave channels onto grip. The cutter was set to bring forth channels of 0.080 inches in deepness. The fly cutter was easy moved frontward along the grip, therefore carving the channel. Unwanted quiver was reduced by puting a chow under grip.

Polishing of Screwdriver

The screwdriver was rotated in a three jaw chow, where the chow held the screwdriver by the blade. Emery paper of grade 120 and 220 severally were used to smooth the grip followed by a length of wood. Upon completion, the place of the screwdriver was reversed in the chow and the procedure was repeated for the blade, utilizing merely the 220 emery paper.

Justification of Materials used.

Several different stuffs were used during the building of this screwdriver. Listed below are those stuffs and the grounds for their pick: –

Teak Wood

Teak wood was used in the building of the grip for many grounds. Teak wood is strong, dense and lasting and can be easy shaped. It would non eat and would non easy break up. Wood is besides a hapless music director of electricity so it provides some isolation when working in electrical applications

Teak is besides immune to high temperatures ; therefore it is suited for hot electrical applications. Finally wood is a natural renewable resource which would harmlessly break up in a landfill. Therefore teak wood was an environmentally friendly pick.

Stainless steel

Stainless steel was used in the building of the blade. This was chosen because chromium steel steel has high caustic opposition, besides it is easy to machine and work with. It has an first-class strength to burden ratio which means that it can be used in heavy responsibility electrical environments, at high temperatures. Finally unstained steel is inexpensive and an overall economic pick.

Galvanised Steel

Galvanised steel is another low cost economic metal with a long life span. The galvanised bed provides protection for the remainder of the steel against corrosion, therefore doing it a good pick for the neckband.

Mild steel

Mild steel was used as the pin because it is reasonably immune to corrosion. It besides does non hold a high tensile strength so it can easy be flared onto the neckband when placed into grip.

Discussion

The fabricated screwdriver is reasonably suited for electrical intents, as it fulfils most of the standards. Firstly it can take a screw easy, it provides acceptable electrical insularity and it can execute at high temperatures. Second it is easy to build, economical, environmentally friendly and attractive.

When compared to a Stanley Standard Blade ( see Fig5 in appendix ) level caput screwdriver, 5/16 ten 6 inches, to the fabricated screwdriver in footings of electrical intent, each tool has its advantage. The Stanley screwdriver has a fictile insulator grip which offers greater electrical insularity than teak wood. Besides the grip of the Stanley is softer than the wooden grip and more ergonomically designed for comfort and clasp. The polished wooden grip might steal when untightening prison guards.

On the other manus the teak grip is more immune to heat and hence will be more applicable in high temperature conditions. Besides plastic is non as strong was wood, the grip of the Stanley is forged onto the blade and hence it more prone to breakage when compared to the wooden grip.

The blade of the Stanley is constructed of nickel metal steel which is stronger and more caustic resistant than unstained steel. However it is more expensive and harder to machine than unstained steel. The Stanley blade would hold been preferred in electrical applications.

Finally by the procedure of hammering the tip of the fabricated screwdriver was hardened. Hardened tips are needed for faux pas immune tantrums and to forestall mechanical harm to blade. Both the Stanley and the fabricated prison guard drivers utilized hardened tips.

Decision

In decision the Fabricated Screwdriver may non be the best electrical screwdriver on the market but in its building one would hold surely achieved the aims of this undertaking which was to larn assorted workshop accomplishments, fabrication procedures, safe machine operation and an overall consciousness of the workshop. The Fabricated Screwdriver besides satisfied basic criterions for usage in an electrical environment, such as resistant to high temperatures and an insulated grip. It was besides a perfect balance of cost, public presentation, quality and lastingness.

Mentions

hypertext transfer protocol: //en.wikipedia.org/wiki/Vise_ ( tool )

hypertext transfer protocol: //en.wikipedia.org/wiki/Lathe_ ( metal )

hypertext transfer protocol: //en.wikipedia.org/wiki/Drill_press # Drill_press

hypertext transfer protocol: //en.wikipedia.org/wiki/Milling_machine

hypertext transfer protocol: //en.wikipedia.org/wiki/Arbor_press

hypertext transfer protocol: //en.wikipedia.org/wiki/Disc_sander

hypertext transfer protocol: //www.design-technology.org/teak.htm

hypertext transfer protocol: //www.jindalstainless.com/stainlesssource/advantages/index.html

hypertext transfer protocol: //www.gscsteel.com/galvanizedadvantages.html

hypertext transfer protocol: //www.Stanley Hand Tools Screwdriver.html