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Henrob installs state of the art heat treatment facility

Supplier: Henrob By: Stuart Blacket
20 August, 2010

A new state of the art heat treatment facility sets high standards.

Henrob continues to grow through rapidly increasing demand for innovative self piercing rivets and has completed a 24,000 square feet extension to its main manufacturing facility in 2008.

This recent extension includes the installation of a state of the art heat treatment facility and a further increase in fastener production capacity.

This fully automated furnace line gives Henrob a major benefit with achieving precise, class-leading heat treatment specifications for their products. The line incorporates a pre-wash to remove oil and grease, a mesh belt hardening furnace and oil quench tank, a post wash to clean the hardened parts and a tempering furnace with air cool to finish the process.

The pre-wash gives an excellent standard of cleaning which greatly assists in the hardening process and minimises the risk of surface diffusion. The atmosphere and carbon potential are automatically monitored at six points along the length of the furnace. Henrob has invested in specialist equipment to calibrate the carbon potential monitors, which is done on a weekly basis.

Henrob, a TS16949 and Ford Q1 accredited company, has chosen to operate the furnace to the demanding CQI9 standard enabling them to achieve an unsurpassed level of quality in their heat treated parts.

Self-piercing rivet technology was pioneered by Henrob of Deeside in North Wales in 1985. As the technology was developed and refined, the range of applications has grown to include automotive, washing machines, clothes dryers, steel house frames, road signs, air conditioning ducting, grain silos, electrical bus bars and water tanks.

Dick Elsy, director of product engineering at Jaguar Cars, described self-piercing rivets as a strong, assured mechanical joint; a robust process. Self-piercing rivets are essential in the X350 (Jaguar XJ) because of difficulties associated with spot welding aluminium. At least 3,000 rivets will be required for each body, joining an array of materials.