Zhuzhou Wei Ye Cemented Carbide Co., Ltd.
Zhuzhou Weiye Cemented Carbide Industrial Co., Ltd.
Add to Cart
Strictly Testing Tungsten Carbide Drawing Die Percent Of Wolfram To Ensure Goods Quality
Identity:
The tungsten carbide drawing die (tungsten steel die) is made of high quality carbide, which has high hardness, good thermal conductivity and low friction coefficient. Cemented carbide drawing die is simple to make, corrosion resistance, strong impact resistance, low price is the prominent feature of this product, suitable for drawing ferrous metals, large-size wire rods, as well as the use of poor wire drawing conditions.
Manufacture Processing:
Carbide drawing die blank, die sleeve processing and core assembly process should pay attention to the key points; the main four manufacturing steps:
1. die blank processing;
2. mounting interference;
3. drawing die sleeve processing;
4. mounting process.
Mould blank processing
The core of carbide drawing die will shrink in the sintering process, and the shrinkage of different batches is different because of their composition, pressing and sintering process, and the different parts of the blank often form "saddle" or "horn mouth" shape because of the different shrinkage. The fluctuation of the shape and dimension of the die blank conforms to the standard of the die blank, but it is far beyond the interference requirement of the die set, which causes the die core to bear the prestress unevenly and the service life of the die to be greatly reduced. Therefore, the die blank must be grinded in an outer circle, and special clamps and diamond grinding wheels should be used on the grinder.
Interference fit
In order to make the core get certain prestress, the diameter of the inner hole of the sleeve should be smaller than the outer diameter of the core. The difference between the two is called interference. The magnitude of interference should be determined according to the size and deviation of the die core, drawing stress and inserting method. Table 1 actual interference level for die inserting. The die set is inlaid with hot pressing method and cold pressing method. The interference of cold pressing method is small, and the prestressing stress obtained is also small. It is mostly used to manufacture wire drawing dies with small specifications and for drawing soft metals.
Die sleeve processing
The die sets are machined by lathe turning, and the main points of control are as follows:
(I) the roughness of the inner diameter of the die set must reach 0.80 I.6 m, which is beneficial to match closely with the die sleeve.
(2) the inner diameter of the die sleeve should be one-to-one corresponding to the external diameter of the die blank, so as to ensure the accuracy of each mold interference.
(3) the bottom surface of the inner hole of the mold sleeve must be parallel with the outer end of the mold, and ensure that the center of the die hole is vertical after the sleeve is installed.
(4) the ellipticity of the inner hole of the mold sleeve should be as small as possible and should not be greater than 0.02 mm. When hot loading, the outer surface of the mold sleeve should be light and ensure uniform cooling after installation.
Installation process
The cold pressing process is pressing the die blank into the mould sleeve at room temperature with a press. The cold pressing method requires accurate interference and high dimensional accuracy of die core and die sleeve. The advantages of the cold pressing method are that it does not need heating equipment, saves energy and reduces cost.
Grade and Application:
Hard alloy drawing die is widely used for wire drawing. Drawing is a manufacturing process used to reduce or alter the cross section of a wire by using a series of drawing plates or dies. Steel wire drawing, insert a "NIB" inside the steel casting tungsten carbide.
| Grade | Density g/cm³ | TRS Mpa | Hardness HRA | Usage |
| YG6X | 14.95 | 1800 | 91.5 | It is suitable for making drawing die with less than 6.00mm drawing hole |
| YG6 | 14.95 | 1900 | 90.5 | It is used to make drawing dies for non-ferrous metal rods with inner holes less than 20.00mm and pipes with inner holes less than 10.00mm. |
| YG8 | 14.8 | 2200 | 89.5 | Drawing die for drawing steel and non-ferrous metal rods and pipes |
| YG10 14.5 | 14.5 | 2400 | 88.5 | |
| YG15 | 14 | 2800 | 87 | It is used for making steel rods and pipes with high shrinkage |
About Us: Zhuzhou Weiye Cemented Carbide Industrial Co., Ltd is a professional manufacturer producing premium and high quality cemented carbide products, founded in 2001 and locates in the National High & New-Tech Development Zone in Zhuzhou city of China. We are a provincial high-tech enterprise specializing in development, production, and sales of cemented carbides.
Appreciate to receive any of your inquires or needs for our carbide products, please feel free to contact us.