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Deburring
There are many deburring processes, but the most common are mass-finishing, spindle finishing, media blasting, sanding, grinding, wire brushing, abrasive flow machining, electrochemical deburring, electropolishing, thermal energy method, machining, water jet deburring, and manual deburring.[5]
Manual
Manual deburring is the most common deburring process because it is the most flexible process. It also only requires low cost tools and allows for instant inspection.[6] Manual deburring is either done with tools like scrapers, files, sandpaper, stones and reamers or with handheld power tools that use abrasive points, sandpaper, or cutters similar to those used to deburr during machining.
Electrochemical
Electrochemical deburring is the use of electrochemical machining to deburr precision work pieces and edges that are hard-to-reach, such as intersecting holes. The process uses a salt or glycol solution and electricity to dissolve the burr. The electric current is applied with a specialized tool to reach the burr location. Burrs are removed in 5 to 10 seconds, while the rest of the work piece is unaffected.[6]
Thermal
Thermal energy method (TEM), also known as thermal deburring, is a deburring process used to remove hard-to-reach burrs or burrs from multiple surfaces at the same time. The process uses an explosive gas mixture to provide thermal energy to burn off the burrs. It is the fastest burr removal process, requiring only 20 milliseconds to remove a burr.[7]
The process starts by loading the workpiece into an explosion-proof chamber, which is then sealed and clamped with approximately 220 metric tons (240 short tons). The chamber is then evacuated of air and filled with an oxygen and fuel mix; this mixture is pressurized to 0.5 to 1.9 MPa (73 to 276 psi). An electrical igniter then ignites the mixture, which burns for approximately 20 milliseconds, causing all of the sharp corners and burrs to burn away. The peak temperature reaches 3,000 °C (5,430 °F).[7]
South West Englandis one of nine officialregions of England. It consists of the counties ofBristol,Cornwall(including theIsles of Scilly),Dorset,Devon,Gloucestershire,SomersetandWiltshire. Large cities and towns in the region includeBristol,Bournemouth,Cheltenham,Exeter,Gloucester,PlymouthandSwindon. It is geographically the largest of the nine regions of England covering 9,200 square miles (23,800 km2),[1]but the third least-populous, with approximately five million residents.
The region includes theWest Countryand much of the ancient kingdom ofWessex. It includes two entirenational parks,DartmoorandExmoor(a small part of theNew Forestis also within the region); and fourWorld Heritage Sites:Stonehenge, theCornwall and West Devon Mining Landscape, theJurassic Coastand theCity of Bath. The northern part of Gloucestershire, nearChipping Campden, is as close to the Scottish border as it is to the tip of Cornwall.[2]The region has by far the longest coastline of any English region.
The region is at thefirst levelofNUTSforEurostatpurposes. Key data and facts about the region are produced by theSouth West Observatory. Following the abolition of theSouth West Regional AssemblyandGovernment Office, local government coordination across the region is now undertaken bySouth West Councils.
The region is known for its richfolklore, including the legend ofKing ArthurandGlastonbury Tor, as well as its traditions and customs. Cornwall has its own language,Cornish, and some regard it as aCeltic nation. The South West is known forCheddar cheese, which originated in theSomersetvillage ofCheddar; Devoncream teas,crabs,Cornish pasties, andcider. It is home to theEden Project,Aardman Animations, theGlastonbury Festival, theBristol International Balloon Fiesta,trip hopmusic and Cornwall'ssurfingbeaches. The region has also been home to some of Britain's most renowned writers, includingDaphne du Maurier,Agatha ChristieandEnid Blyton, all of whom set many of their works here, and the South West is also the location ofThomas Hardy's Wessex, the setting for many of his best-known novels.
