Mill rolls are an important part of the rolling mill in the steel plant. The pressure produced by a pair or group of rolls is used to roll steel. It mainly bears the influence of dynamic and static load, wear and temperature change during rolling.
The tool that makes the metal forced through the die under the action of external force, the metal cross-sectional area is compressed, and the required cross-sectional area shape and size is obtained is called Drawing dies.
Carbide descaling roller can remove the phosphorus element on the steel surface, reduce the cold brittleness and cracks of the steel, improve the plasticity and weldability of the steel, and make the phosphorus content of the steel less than 0.045%.
Cold heading dies is a die that can cut off, perform and form into cold forming parts on the cold forming lathe.
UKO’s Thread Rolling Tools including Flat Dies, Planetary Dies, and Thread Rolling Cylindrical dies.
Nail Gripper Dies used in nail making machine, which is a working part and a consumable.
Nail Gripper Dies
Carbide Cold Roller
Hot Mill Rolls
Thread Rolling Dies
Carbide Descalling Roller
Wire Drawing Dies
Wire Straightening Dies
What is PCD wire drawing dies?ukoadmin2021-09-28T08:03:52+00:00
PCD is commonly known as the “artificial diamond”, PCD is a top-quality material for wire drawing dies. Its working life is 15-25 times the working life of tungsten carbide dies so that improving efficiency and saving cost for users.
Polycrystalline Diamond (PCD) Wire Drawing Dies that can be used for a wide range of drawing applications. PCD Dies offer a high resistance to wear and an excellent wire surface finish. The dies can be used in ferrous and non-ferrous wire drawing applications.
What kinds of drawing die core materials?
The drawing core is the core component of the diamond wire drawing die, which can be divided into a PCD (polycrystalline diamond) Core, CVD Diamond Core, and Single-crystal Diamond Die Core three categories.
The common brushed core models in the market include SD, CXD, and CXT series. The success of PCD has brought great changes to the wire draw industry, which makes the entire processing process more efficient and stable. The PCD is sintered by the micrometer diamond particles and the binding agent to be sintered under high temperature and high-pressure conditions, the hardness is high, the wear resistance, the impact resistance is strong, and the advantages of uniform wear and long life during the mold use are applicable. High-speed draws. Since the PCD presents isotropic in macro, it does not occur like a single crystal diamond and a phenomenon of unevenness and the phenomenon of the mold hole. In addition, since the price of PCD is much lower than that of single-crystal diamonds, it has been widely used in the brushed industry. Most diamond drawings are used using a PCD brushed mold. The PCD core can be divided into cobalt-based and silicon groups. The cobalt-based PCD core contains a metal-binding agent, which has good processability, can be processed using a process of an electric spark, laser, ultrasonic wave, but the presence of cobalt makes diamonds easy to occur in high temperatures, so the core is Suitable for processing and use under conditions below 650 degrees Celsius. The silicon-based PCD core processability is relatively poor, but there is no metal-binding agent in the material, and thus the material can still maintain good thermal stability under 1000 degrees Celsius.
CVD Diamond Core
CVD diamonds are also known as chemical vapor deposition diamonds, which are carbon-containing gas under high temperature and low-pressure conditions, depositing pure diamonds grown on the surface of the solid substrate. The CVD diamond has high hardness, good wear resistance, low friction coefficient, high surface finish, can be made of 0.02-1.0mm aperture drawing, for drawing stainless steel wire, tungsten wire, molybdenum wire, copper wire, aluminum wire, etc. Since the CVD diamond does not contain any binding agent, the CVD diamond brushed mold exhibits higher abrasion resistance, corrosion resistance, thermal conductivity, and thermal stability compared to the PCD. The disadvantage of this product is that its toughness is not as good as PCD, weak impact resistance, cracking, and brushed mold preparation is also strict than PCD.
Single Crystal Diamond Core
The single-crystal diamond has a high hardness and excellent wear resistance. The surface of the wire is tapered is high, but since the structure has an anisotropy, the hardness is also anisotropy, so that the wear of the mold hole is not Uniform, the product is not round, and the resources are rare, the price is expensive, and the fine line drawing die or finished drawing die is generally used as a high surface quality requirement. The single-crystal diamond brushed core is divided into two types: natural diamond brushed mold and artificial single-crystal diamond brushed mold core.
What is the work area structure of the drawing dies and function?ukoadmin2021-09-28T06:53:56+00:00
The structure of the wire drawing dies core can be divided into five sections according to the nature of the work:
Bell Radius: It is convenient to thread and prevents the wire from scratching the drawing dies from the entrance direction.
Entrance Angle: Through it, the steel wire can be easily brought into the lubricant.
Approach Angle: The main part of the die hole, where the deformation process of the steel wire is carried out, that is, the original section is reduced to the required section size.
Land: Its function is to obtain the exact size of the drawn wire.
Back Relief: Used to prevent the steel wire from being unsteady and scratching the surface of the steel wire.
The inner diameter profile of the drawing dies is very important, it determines the tension which is required to compress the wire and affects the residual stress in the wire after drawing.
With the increase of the wire drawing speed, the service life of the wire drawing dies has become a prominent problem. Americans T Maxwall and E G Kennth proposed a new wire drawing dies hole pattern theory suitable for high-speed wire drawing, that is, the “straight line” theory. The wire drawing dies made according to this theory has the following characteristics:
The entrance area and lubrication area are combined into one, which has a tendency to reduce the lubrication angle so that the lubricant is subjected to a certain pressure before entering the working area, so as to achieve a better lubrication effect.
The entrance area and working area are lengthened to establish a better lubrication pressure, and the angles are optimized according to the drawing material and the compression rate of each pass.
The sizing area must be straight and reasonable in length.
The vertical line of each part must be straight.
What are the types of core materials for drawing dies?ukoadmin2021-09-28T06:51:32+00:00
The wire drawing die industry has experienced decades of development, and many new core materials for wire drawing dies have emerged.
According to the types of materials, the wire drawing dies can be divided into alloy steel dies, tungsten carbide dies, natural diamond dies, polycrystalline diamond dies, CVD diamond dies and ceramic dies.
The development of new materials greatly enriches the application range of the wire drawing die and increases the service life of the wire drawing die.
Comparison of the advantages and disadvantages of various drawing die materials:
Drawing dies material
Alloy steel drawing dies
Easy to make
Poor wear resistance and short life
Natural diamond drawing dies (ND Drawing Dies)
High hardness and good wear resistance
Brittle and difficult to process
Used to manufacture wire drawing die cores with a diameter of less than 1.2mm
Tungsten carbide drawing dies (TC Drawing Dies)
Good polishability and low energy consumption
Poor wear resistance and difficult processing
Various diameter wires
Polycrystalline synthetic diamond drawing dies (PCD Drawing Dies)
High hardness and good wear resistance
Difficulty in processing and high cost
Small wire, metal wire
CVD coating material drawing dies (CVD Drawing Dies)
High finish, good temperature resistance
Complex process, difficult to process
Ceramic material drawing dies
Wear resistance, high temperature resistance, good corrosion resistance