The reaming tool deforms only the end of the pipe in a plastic way, thus increasing its inner and outer diameters to the required parameters.8 In industry, flattening involves rolling the pipe through rollers, which give it the appropriate shape.9 Flattening of pipes with hand tools is widely used during installation of water pipes, installation of air conditioners, installation of automobile and aviation brake and fuel systems.1011
The simplest flattener is a conical shaped template.12 It is inserted into the pipe, and hammered in the axial direction, which causes deformation to the required value. The main disadvantages of using such a tool are the inability to control the accuracy of the fit and the high probability of deformation of the walls where they should remain straight.
The most common is a tool design with a die and a cone, which is screwed through the handle until the edges are separated at the required angle.131415
A relatively new compact design is the reamer, used as an attachment to a drill. In this case, by friction, the pipe material is heated and gradually flattened to the shape of the nozzle.16
In industrial settings, a wide range of metals are subjected to reaming. Copper and its alloys, mild steel, and in some cases small diameter stainless steel pipes are most commonly reamed with hand tools.17
Copper is perfectly machinable, a quality tool successfully performs wall deformation, the surface remains smooth, the wall thickness is almost the same, and the material retains a homogeneous structure.
Manufacturing and Engineering Technology: Serope Kalpakjin ↩
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