Design of Multi head Drawing Machine Mold
Mold structure design
1. Entrance area design:
The entrance area mainly plays a role in guiding metal wires to enter the mold smoothly. Its shape is usually trumpet shaped, with an angle generally between 60 ° and 90 °. For example, when drawing copper wire, the entrance angle can be set to around 70 °, which can reduce the resistance when the wire enters the mold.
The length of the entrance area is usually determined based on the diameter of the wire and the overall size of the mold, and is generally 1-2 times the diameter of the wire. The surface roughness requirement for the entrance area is relatively low, usually with Ra reaching 0.8-1.6 μ m to prevent scratching of the wire.
2. Lubrication area design:
The lubrication zone is designed to form a lubricating film on the surface of the wire material, reducing the friction during the drawing process. The length of the lubrication zone is generally 3-5 times the diameter of the mold.
The structure of the lubrication zone can be in the form of annular grooves or spiral grooves. The width and depth of the annular groove are generally between 0.2-0.5mm, and the pitch of the spiral groove can be designed according to the drawing speed and lubrication requirements, generally between 1-3mm.
3. Compression zone design:
The compression zone is the core part of the mold, which determines the degree of deformation and dimensional accuracy of the wire. The length of the workspace is determined based on the drawing ratio and wire material, with a larger drawing ratio resulting in a relatively longer workspace length.
The shape of the compression zone is generally conical, with a cone angle typically between 3 ° and 12 °. For metal wires with higher hardness, the cone angle can be appropriately reduced to avoid wire breakage. The diameter accuracy of the workspace requires high precision, with tolerances generally controlled within ± 0.005mm.
4. Design of sizing zone:
The sizing zone is mainly used to precisely control the final size of the wire. The length of the sizing zone is generally 0.5-1 times the diameter of the wire.
The diameter tolerance control in the sizing area is extremely strict, generally within ± 0.002mm, to ensure that the size of the wire after drawing is uniform and consistent.
5. Design of pressure relief outlet area:
The function of the pressure relief outlet area is to ensure that the drawn wire leaves the mold smoothly. The shape of the export area is trumpet shaped, with an angle generally between 30 ° and 60 °, and a length of 0.5-1 times the diameter of the wire.
1. Entrance area design:
The entrance area mainly plays a role in guiding metal wires to enter the mold smoothly. Its shape is usually trumpet shaped, with an angle generally between 60 ° and 90 °. For example, when drawing copper wire, the entrance angle can be set to around 70 °, which can reduce the resistance when the wire enters the mold.
The length of the entrance area is usually determined based on the diameter of the wire and the overall size of the mold, and is generally 1-2 times the diameter of the wire. The surface roughness requirement for the entrance area is relatively low, usually with Ra reaching 0.8-1.6 μ m to prevent scratching of the wire.
2. Lubrication area design:
The lubrication zone is designed to form a lubricating film on the surface of the wire material, reducing the friction during the drawing process. The length of the lubrication zone is generally 3-5 times the diameter of the mold.
The structure of the lubrication zone can be in the form of annular grooves or spiral grooves. The width and depth of the annular groove are generally between 0.2-0.5mm, and the pitch of the spiral groove can be designed according to the drawing speed and lubrication requirements, generally between 1-3mm.
3. Compression zone design:
The compression zone is the core part of the mold, which determines the degree of deformation and dimensional accuracy of the wire. The length of the workspace is determined based on the drawing ratio and wire material, with a larger drawing ratio resulting in a relatively longer workspace length.
The shape of the compression zone is generally conical, with a cone angle typically between 3 ° and 12 °. For metal wires with higher hardness, the cone angle can be appropriately reduced to avoid wire breakage. The diameter accuracy of the workspace requires high precision, with tolerances generally controlled within ± 0.005mm.
4. Design of sizing zone:
The sizing zone is mainly used to precisely control the final size of the wire. The length of the sizing zone is generally 0.5-1 times the diameter of the wire.
The diameter tolerance control in the sizing area is extremely strict, generally within ± 0.002mm, to ensure that the size of the wire after drawing is uniform and consistent.
5. Design of pressure relief outlet area:
The function of the pressure relief outlet area is to ensure that the drawn wire leaves the mold smoothly. The shape of the export area is trumpet shaped, with an angle generally between 30 ° and 60 °, and a length of 0.5-1 times the diameter of the wire.