The Revolution of Micro Precision Cold Extrusion Parts Micro Precision Cold Extrusion is a cutting-edge production technology that has been widely adopted for the large-scale production of medium and small forgings. This technology is characterized by its high precision, high efficiency, high quality, and low consumption.Get more news about Micro Precision Cold Extrusion Part Exporter,you can vist our website! The automotive industry, mechanical engineering, and other high-tech industries have a strong demand for precision formed connecting elements of various kinds. These parts are subject to high price pressure. Thanks to the highly modern cold forming and extrusion technology, complex parts that could only be produced at great effort and expense on lathes in the past can now be manufactured as low-cost cold extrusion or cold formed parts. Specializations in this field include collar studs, parts with shoulder, stepped bores as well as parts with female and male threads – in steel, high-grade steel, brass, copper or light metals. For smaller batch sizes, the manufacture of low-cost blanks as cold extrusion parts is recommended. Compared with hot forging and warm forging, Micro Precision Cold Extrusion can save 0% to 50% of material and 40% to 80% of energy. This significant reduction in material and energy consumption makes it an environmentally friendly choice for industries. Moreover, the modular extruder design allows the removal of the barrel and its replacement by a preheated barrel with pre-mounted tooling, all within a few minutes. This system slashes changeover time in the cleanroom and removes the dirty activity from the clean environment by hot-swapping the barrel, screw, and die head. In conclusion, Micro Precision Cold Extrusion is revolutionizing the manufacturing industry. Its ability to produce high-quality parts at a lower cost and with less environmental impact positions it as a key player in sustainable industrial practices. As technology continues to advance, we can expect to see even more improvements and applications for this innovative process.

The surface effect of ultrasonic vibration in double cup extrusion test Ultrasonic vibration has been widely studied because of its excellent utility and performance in the plastic forming of metals. The mechanism and effects of ultrasonic vibration on material flow and deformation have therefore become a focus for current research. Get more news about Micro Precision Cold Extrusion Part Exporter,you can vist our website! The mechanisms of ultrasonic vibration as it acts on materials include the volume effect and the surface effect. Double Cup Extrusion (DCE) testing is an ideal method for studying the surface effect but there have been few studies and some conclusions from those studies have been contradictory. For the present study, a new ultrasonic vibration-assisted DCE device was specifically designed and used for the experiment. In the tests, friction factors were calibrated and analyzed using the finite element method (FEM). The results show that ultrasonic vibration can effectively improve interface friction conditions in DCE. By changing ultrasonic loadings, an explanation was found for the ‘illusion’ that ultrasonic vibration increased interface friction, as had previously been reported. It was also shown that ultrasonic vibration exhibits a significant size effect, which can efficiently offset the negative size effect of friction in the micro-forming process. Further, it was found that the ultrasonic effect is influenced by the wall thickness of the formed part—the smaller the wall thickness, the more significant the effect of ultrasonic vibration. Ultrasonic vibration can significantly improve the plastic forming of metal, and the related technology has recently attracted a great deal of academic interest. The application of ultrasonic vibration in wire drawing (Hayashi et al., 2003), micro blanking (Liu et al., 2017), deep drawing (Malekipour et al., 2020), and single point step forming (Amini et al., 2017; Vahdati et al., 2017) processes has been widely studied. The effects of ultrasonic vibration on material flow and deformation in metal forming, and the potential mechanisms behind these phenomena, have become foci for current research. During plastic forming of metal, the mechanisms by which ultrasonic vibration acts on materials is complex, and include stress superposition, thermal softening, dislocation absorption of acoustic energy, reduction of internal and external friction, the dynamic effects of high-frequency vibration tools, thermal effects, etc. However, these effects can essentially be summarized in terms of the “volume effect” and the “surface effect”. The volume effect mainly principally refers to the reduction in material flow stress caused by ultrasonic vibration. Blaha and Langenecker (1955)were the first to discover that ultrasonic vibration reduces the yield and flow stresses of metals in tensile experiments, so the volume effect is also known as the “Blaha effect”. In tensile or upsetting experiments, friction has little effect on forming loads (Slater, 1977) and the reduction of forming load caused by ultrasonic vibration can be demonstrated intuitively. Tensile and upsetting experiments are therefore the principal methods for studying the mechanism of the volume effect. Yao et al. (2012) established a theoretical model for acoustic softening based on thermal activation theory and dislocation evolution theory, and verified the validity of the model using upsetting tests. Ahmadi et al. (2015) fabricated specimens with different grain sizes using ECAP (Equal Channel Angular Pressing) and performed ultrasonic tensile experiments. It was found that ultrasonic vibration reduced the flow stress of the specimens and that the extent of the reduction depended on the grain size. Fartashvand et al. (2017) conducted ultrasonic tensile experiments on Ti-6Al-4 V alloy to determine the relationship between ultrasonic power and yield stress reduction. Hu et al. (2018) divided the mechanism of the volume effect into three parts: stress superposition, acoustic softening and dynamic impact. When ultrasonic amplitude is small, stress superposition and acoustic softening are the main causes of flow stress reduction. When the ultrasonic amplitude is large, the dynamic impact effect occurs. Sedaghat et al. (2019) considered the application of dislocation dynamics and acoustic energy conversion mechanisms in developing a constitutive model to describe the deformation behavior of materials under ultrasonic vibration-assisted forming, validating the model using upsetting, stamping and step forming experiments.

Micro-Injection Molding LSR: Exploring the Limits of What’s Possible Without us noticing, tiny plastic parts are increasingly making inroads into our lives: in cars, medical technology, mobile phones and wearables. Increasing numbers of these micro-parts are made of silicone. But what challenges does micro-injection molding pose for processors? Is liquid silicone, which is seeing increasingly widespread use, making processes more complex than they already are for thermoplastics? And where will the journey take us—how far can the limits of what is feasible be pushed?Get more news about Micro Precision Cold Extrusion Part Exporter,you can vist our website! The trend towards miniaturization has gained considerable momentum in recent years. Many products—and with them the parts they are made of—are becoming smaller, more delicately complex and more compact. Micro-injection molding is used to produce many of these complex, delicate parts. In medical technology, examples include the increasing numbers of minimally invasive operations or new methods of analysis. Another target group for micro-molding is consumer electronics with very small electronic and optical precision components for smartphones, among other things. Even luxury goods such as watches increasingly contain tiny components made of thermoplastic—for example, cog wheels in watch movements or clips—and silicone for tiny seals. It is the latter material, in particular, that is gaining increasing market share because of its special properties. Due to trends toward electromobility and autonomous driving, the automotive industry will also require larger numbers of micro-parts made of liquid silicone rubber (LSR) in the future. Micro-injection molding means working with part weights of significantly less than one gram. Right now, some manufacturers are already achieving part weights below one milligram—although it makes a big difference here whether the raw material is a thermoplastic with a low specific weight or a liquid silicone with higher density (typically 1.10 to 1.50 g/cm3). Micro-parts made of silicone are generally heavier than thermoplastic micro-parts, but they can be smaller—and more challenging—in terms of dimensions. But before we turn to the differences between LSR and thermoplastic in processing, it's worth taking a comprehensive look at the special challenges of micro-injection molding. These challenges exist independently of the raw material used, because some of the engineering challenges in micro-injection molding arise solely from the part—and part feature—dimensions and extremely low masses processed. Given a component 1.7 mm long and 0.9 mm in diam., the part weight made of LSR is 0.0005 g (Fig. 1). If you have 32 cavities, the total shot weight (including sprue) is then 0.125 g. This is the equivalent of about 125 grains of sugar. For comparison's sake, a sugar cube contains about 20,000 to 30,000 grains. Such small quantities as in this example—connecting elements used in instruments for ophthalmic diagnostics—now must be uniformly and repeatably distributed over all the cavities. The micro-injection unit, the sprue channel and thermal management are enormously important here in terms of quality, precision and repeatability. The sprue channel alone illustrates how much technical know-how micro-injection molding requires. Its volume must be in a balanced ratio to the volume of the molded part(s). Several boundary conditions have to be weighed against each other and the overall process optimized. Key factors are process management, the waste and energy statistics, the material price and cycle time. All this poses the greatest challenges for the equipment manufacturer and for the manufacturer of the micro-parts.

Cold Extrusion of Steel

Extrusion, though one of the most important manufacturing processes today, is a relatively young metalworking process. The cold extrusion process involves forcing a billet of material through a die at room or slightly elevated temperatures, producing a continuous product of constant cross-section. Numerous metals are suitable for cold extrusion, including lead, tin, aluminum alloys, copper, titanium, molybdenum, vanadium, and steel.Get more news about Precision Cold Extrusion,you can vist our website!

A wide variety of parts can be produced, including collapsible tubes, aluminum cans, cylinders and gear blanks. Cold extruded parts do not suffer from oxidation and often have improved mechanical properties due to severe cold working, as long as the billet temperature remains below the re-crystallization temperature.

Cold extrusion technology permits the forming of a part to the desired size and shape by moving the metal at room temperature into the die. Sufficient force is required to exceed the yield strength of the stainless steel and ensure plastic deformation results, enabling the metal to fill out the die cavities to extremely close tolerances. Although there are many different cold extrusion operations, all are variations of one or more of the following:

Forward extrusion forces the metal to flow in the same direction as the descending punch and through a hole in the die to form the required shape and dimensions, as shown in Figure 1a). Forward extrusion is especially useful in the production of bolts and screws, stepped shafts, and cylinders.

Backward extrusion forces the metal to flow upwards around the descending punch, as illustrated in Figure 1b). Extrusion pressures are generally higher and slug preparation is more critical.

Upsetting is the gathering of metal in certain sections along the length of a bar, rod or wire as shown in Figure 1c). The metal is forced to flow at right angles to the motion of the tolling. Upsetting is often performed in conjunction with backward or forward extrusions.