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]
Braintree is a town in Essex, England, and is the principal settlement of Braintree District. It is located 10 miles (16 km) north-east of Chelmsford, 15 miles (24 km) west of Colchester and 35 miles (56 km) north-west of Southend-on-Sea. According to the 2021 Census, the town had a population of 43,492; the urban area, which includes Great Notley, Rayne, Tye Green and High Garrett, had a population of 55,793.[1]
Braintree district has four market towns, picturesque villages, a designer shopping outlet, historic houses and gardens.
The town has grown contiguously with several surrounding settlements. The original settlement and parish of Braintree lay on the River Brain and was bounded on the north by Stane Street, the Roman road from Braughing to Colchester. North of that road was the parish of Bocking. The two parishes were united in 1934 as the parish and urban district of Braintree and Bocking, which was subsequently abolished in 1974 when the modern Braintree District was created. Several local organisations still include Braintree and Bocking in their names.[nb 1]
Braintree is bypassed by the modern-day A120 and A131 roads, while trains serve two stations in the town, at the end of the Braintree Branch Line from Witham.
The town is twinned with Pierrefitte-sur-Seine, France,[2] and gives its name to the towns of Braintree, Massachusetts and Braintree, Vermont, in the United States.[2]
