Oct 17, 2017
Carbide end mill Cold extrusion process
Carbide cold extrusion process is an important part of precision plastic volume forming technology. Cold extrusion means that the metal blank is placed in the mold cavity under cold conditions and the metal is forced out of the mold cavity with strong pressure and constant speed to obtain the desired shape, size, and strength Performance of the extrusion. Cold extrusion processing is to rely on the mold to control the flow of metal, by a large number of metal volume transfer to form parts. Carbide cold extrusion process of the specific advantages of the performance of the following forms:
The first is to save raw materials, cold extrusion is the use of plastic deformation of the metal to make the desired shape of the parts, which can greatly reduce the cutting process, improve material utilization. Cold extrusion material utilization rate can generally reach more than 80%, which is for the production of cemented carbide industry is a very advantageous performance.
The second is to improve the efficiency of production and processing, with cold extrusion process instead of cutting manufacturing parts, can make the productivity doubled. For the modern social and economic production, is also a manifestation of competitive advantage.
Furthermore, carbide products can achieve ideal surface roughness and dimensional accuracy. Parts of the accuracy of up to IT7 ~ IT8 level, surface roughness up to R0.2 ~ R0.6. Parts that are extruded with cold extrusion are rarely re-machined and require only fine grinding at a particularly high level.
And then improve the mechanical properties of parts, cold extrusion after cold hardening of the metal, as well as within the parts to form a reasonable fiber flow line distribution, so that the strength of the parts is much higher than the strength of raw materials. Reasonable cold extrusion process can make the surface of the parts to produce compressive stress and improve fatigue strength. Some of the original heat treatment to strengthen the parts with cold extrusion process can save the heat treatment process, some parts of the original need to use high strength steel production, with cold extrusion process can be used when the lower strength of steel. Carbide cold extrusion process also has such an advantage.
The most important is the carbide cold extrusion process to produce the product cost-effective advantages, high-quality carbide die cold extrusion die life of ordinary steel pressing die 5-10 times, significantly reduced due to the use of ordinary steel mold for mold Times, while increasing production efficiency while reducing production costs. Carbide tool types
According to the size of grain distinction, carbide can be divided into ordinary carbide, fine grain cemented carbide and ultra-fine grain cemented carbide. According to the main chemical composition distinction, carbide can be divided into tungsten carbide based carbide and titanium carbide based carbide. Tungsten Carbide-based Cemented Carbides include tungsten-cobalt (YG), tungsten-cobalt (YT) and rare carbon (YW), which have their own advantages and disadvantages. The main components are tungsten carbide (WC), titanium carbide Tic), niobium carbide (NbC) and other commonly used metal bonding phase is Co. Titanium carbide based carbide is Tic as the main component of the cemented carbide, commonly used metal bonding phase Mo and Ni.