Since its creation, Sino Concept has been manufacturing its own street furniture and traffic safety products, gaining considerable experience between a variety of manufacturing operations in the process. One of these processes is flow drilling.
This process is used for many products, particularly for those products that must be lightweight and portable, an area in which Sino Concept excels.
If you are looking for a subcontractor in China, with years of experience and a strong understanding of your needs, then Sino Concept is the right company for you!
Flow drilling, also known as friction drilling or form drilling, is a method of drilling holes in workpieces without removing material as a traditional drill would.
Flow drilling was invented in 1923 by Jean-Claude de Valière. He wanted to create a tool that could drill holes in metal by friction heat. In the beginning, the expected success of this invention was not big, because the right materials were not yet available and Mr. de Valière did not discover the right shape for this kind of tool. A useful tool for flow drilling was produced during the 1980s.
Flow drilling is a machining process that enables manufacturers to drill most types of materials, including very solid metals. It is mainly used to drill holes in thin materials like sheet metal.
Flow drilling’s process uses the friction force to form a socket in the metal tube or flat sheet metal. The combination of the rotation speed and the axial force applied to the flow drill creates a frictional heat. The tool temperature may reach 900 °C and the piece temperature 700 °C. The material is processed in the form of "super-plastic", allowing the tool to displace material to form a sleeve. The height of the sleeve obtained is about 3 to 4 times the initial thickness of the material.
Flow drilling does not remove any material when it creates the hole. So the drill bit can be designed to form the excess steel into a new shape. The heated metal can be formed above and below the hole to increase wall thickness or to create a collar which can then be tapped with threads.
Thanks to this collar, we are able to fix a screw into the hole in a much more secure way, as it is the case with our expanding barrier.
At Sino Concept we primarily use flow drilling to create a collar which we can then thread for a bolt or screw.
We chose flow drilling because of its productive advantages. Indeed, one process is enough to drill a piece and form a collar around the hole. We can flow drill all types of materials for all products such as our plastic fold-up table.
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