Cold Forging Sound Box Knob / Volume Control Knob With Aluminium
Alloy , Copper, Copper Alloy
*Brand Name: Cold forging sound box knob
*Material: aluminium alloy ,Copper,Copper alloy
* Size(mm): ø46*5.5
*processing technic:Cold Foring
*superficial treatment:anodic oxidation
As sound box accessories
Cold forging is a manufacturing process involving the shaping of
metal using localized compressive force with no or less cutting.
It’s a kind of process wherein the cold metal flows plastically by
volume re-distributing or transferring under compressive forces
into a variety shapes within the dies to obtain desired parts or
blanks. It relies on the die to control the metal flow and forms
parts by metal massive volume transferring. The frequently-used
extrusion methods are: forward extrusion, backward extrusion,
combined extrusion and ironing process. It is a kind of advanced
production technology of high-precision, high efficiency,
environmentally friendly and low power consumption, often used for
large-scale production of small and medium-sized forgings.
Advantage of Cold Forging.
Cold forging process has the following advantages relative to the
die-casting and traditional craft:
1)Conservation of raw materials. Cold extrusion is the process to
make desired shaped metal parts by using the deformation of metal,
can be a significant reduction in machining and increase material
utilization. The material utilization can reach to 80% or more.
2)Improve labor productivity. Instead of cutting process, cold
extrusion process can make productivity improvements in fabricating
3)The work pieces can be obtained the desired surface roughness and
dimensional accuracy. The accuracy of parts can reach to level IT7
~ IT8. The surface roughness can reach to Ra0.2um ~ Ra0.8um,
sufficient to meet Ra3.2um of the part. Parts of higher surface
quality requirements can be simply obtained by finishing machining.
4)Improve the mechanical properties of the parts. Metal flow makes
the interior of the part to form a reasonable distribution fiber
flow lines, the strength of the parts is much higher than the
performance of the raw materials, such as the mechanical properties
of strength, toughness, hardness, fatigue resistance, tightness,
and surface treatment incompatibilities.
5)Reduce the cost of parts. The cost of parts can be greatly
reduced because of the advantage of cold extrusion process in raw
material conservation, productivity improvements, machining
reduction and possibility of replacing higher grade material to
lower grade one.
It can be got from the above characteristics, cold extrusion
technology has outstanding superiority compared with other current
processing methods. This has opened up a broad road for cold
extrusion to replace cutting, forging, casting and tension
processes in machinery parts fabrication industry.