Jobs
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]
Mapperley is a residential and commercial area of north-eastern Nottingham, England. The area is bounded by Sherwood to the north-west, Thorneywood to the south and Gedling to the east.
At various periods the terms 'Mapperley' and 'Mapperley Plains' have been applied to lands, on either side of Woodborough Road (B684), from a point at the junction of Mapperley Road, north-east for a distance of some 3+3⁄4 miles (6.0 km), to that point where the road forks towards Woodborough village. The stretch of Woodborough Road from Mapperley Road to Porchester Road is called 'Mapperley Plains' on Jackson's map of 1851–66, for example.[1][2] This section considers the history of the suburb within the present day city boundary.
The origins of the city of Nottingham suburb called Mapperley seem to be found in the fourteenth century. Writing in the 1670s about lands in the lordship of Basford (i.e. west of present-day Woodborough Road) which were called cornerswong, Dr Robert Thoroton, notes:
In the time of Richard the second (reigned 1377-99), Thomas Mapurley was a considerable man at Nottingham…. He, or his posterity, became possessed of the chiefest part of these grounds, which was the occasion of them being called Maperley's Closes; and since there being a cottage-house or two, and some odd barns erected, it goes for a small Hamlet called Mapurley.[3]
