Technical Data／Diamond Drawing Dies
What is a Diamond Drawing Dies? Diamond Drawing Dies
BLPCD Dies Nano-polycrystallinematerial "BLPCD" in which diamond particles are directly bonded is used. High quality wire surface roughness can be obtained because it does not contain a binder. Especially suitable for use in the ultra-fine wire region. Single Crystal Diamond Dies A single crystal diamond drawing dies using a single crystal diamond having high thermal conductivity is used for a wide range of applications such as copper wire and stainless steel wire for its high quality and long life. In particular, it is suitable for processing that requires ultrafine wire drawing and high quality surface roughness. Polycrystalline Diamond Dies For a Polycrystalline diamond drawing dies, sintered diamond powder obtained by ultra-high pressure is used. Although the target material is the same as that of a single crystal diamond drawing dies, it can be applied to a wide range of applications from large diameter wire to thin wire because it can be applied to larger sizes. Shaped Wire Drawing Dies The cross sectional area provides a heteromorphic shape other than a circle. It is used for manufacturing various heterogeneous wires – from windings of transformers in the heavy electric industry to connector pins and flat cables used in general electric machinery to accessories such as chains of necklace.
To make desired smaller wire diameter by a tool with conical hole is called "wire drawing " or "wire drawing process". The hole of the tool has different diameter each side, its entrance is wide and its exit is small - the tool is "die". "Diamond dies" has with diamond for superior precision and longevity. We suggest appropriate diamond type and die shape for application.
Structure and Role of Diamond Drawing Dies
■Basic Case Shape
Type of Diamond
Bell [Bell Angle (α)] Provide Good Condition for Lubricant Inlet
BLPCD Contains the Characteristic of Single Crystal Diamond and Polycrystalline Diamond
Approach [Approach Angle (β)] Reduce Vibration and Guide Wire Reduction [Reduction Angle (γ)] Squeeze and Reduce the Wire Diameter, Most Important Part to Judge Efficiency and Quality of the Dies Bearing [Bearing Length(%D)] Give the Final Diameter and Surface Quality Back Relief [Back Relief Angle (θ)] Support the Bearing Area Exit [Exit Angle(ψ)] The Way of the Wire to Go Out
Artificial Single Crystal Diamond Stable Supply
■Die Hole Status of Shaped Diamond Die (Zoom in)
(Stable Crystal Structure) Polycrystalline Diamond Excellent Wearing Resistance, No Crystal Orientation Like Single Crystal Diamond
Stainless Steel Casing
Mounting Powdered Brazing Alloy
Square
Rectangular
Ribbon Shape
Hexagon
Track Shape
Compacting Dies
Wire Drawing Machine Types
A compacting dies is a tool that compresses circularly while twisting conductors (wires), used for power cables and low voltage electric wires (wire harnesses) for cars．
Non Slip Type
Has the structure where the peripheral speed of each winding block is increased in proportion to the elongation rate as the cross sectional area of the wire decreases.
Use Example of Compacting Dies Example of Use (Wire Feed Speed 100/minute number of Stranded Wires 37) Compacting Dies Compacting Dies
Continuous Wire Drawing Machine Several combinations of dies and winding blocks are coupled in series
Compacting Dies
Slip Type
Wire Drawing Machine Produces coil material by providing the drawing force by block
Rotates the block (capstan) at the peripheral speed according to the prescribed section reduction rate, and thins the wire in succession by winding the wire drawn through the die one to several times, making it a finished wire. The peripheral speed of the capstan is made a little faster than the wire speed (to make it slip), generating high heat, thus requiring wet lubricant for cooling. Generally called a wet wire drawing machine.
Single-Head Wire Drawing Machine Has one winding block for a die and draws only once to make it a winding coil
Drawing Machine
Drawing Bench
Mainly draws out linearly to produce bar material
Wire Guide
Wire Guide
Wire Guide
φ2.2×7 Wires → φ6.3
φ6.3＋φ2.2×12 Wires → φ10.5 φ10.5＋φ2.2×18 Wires → φ14.7
Example of Wire Drawing Process (Electronic Cable)
*The figures are color-coded for easy understanding.
Shaving Dies
A shaving dies is a tool that removes oil, oxides, bubbles, scratches on the surface after wire drawing. It is a diamond die that scrapes off the wire surface using the diamond's inner peripheral blade.
■Diagram of Shaving Dies Processing Example
■Image of Shaving Dies Processing
Centering Dies
Case
Wire Material
Waste
Shaving Dies
Polycrystalline Diamond
071
072
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