Construction Machine Blog

Nowadays all kinds of machine tool have been used in manufacturing industry, such as turning, milling, grinder, planer, and so on, but among them, milling machine is the most useful machine tool, because we can produce complex surface through using milling machine. Today, we will study and know a new kind of milling machine which is famous for its high efficiency and cleanness, it is called whirlwind milling machine. Whirlwind machine is a kind of machine which we add the high speed thread devices to normal turning machine, through using CBN tool which is clamped in the high speed milling cutter, we can mill the thread on the workpiece, because of its high speed which is more than 400m/min, high working efficiency, and cool strategy which use compressed air to get the chips out of the thread of the workpiece, it is becoming more and more important and popular. Whirlwind machine can also realize dry cutting ,heavy load cutting and ultra high speed cutting, the surface roughness can reach 0.8 um, because the turning speed of spindle is slow, so the motion accuracy of machine tool is accurate, and we can get high dynamic stability. Here are the motion of the whirlwind machine, the main motion is the high speed turning of the mill cutter, the supplementary motor is the slow turning of the machine tool with clamped workpiece, the feed motor is the slow movement of the mill cutter at x direction, and we should adjust the angle of the mill cutter according to the thread lead angle. The application of the whirlwind machine is spreading all kinds of machinery, for example, the sprite which we drink when we feel thirsty is involved in using this technology, we can manufacture the cap using whirlwind machine, and we can also manufacture all kinds of bolts and ball screws. On the whole, the whirlwind technology is widely used in daily life, and we can keep improving the feature of the whirlwind machine, in that way, we can keep doing great in machinery.

In the modern society, we can hardly imagine a world, or even a city without brikcks. Without bricks, no modern construction is possible, including long bridges above the rivers and skyscrapers high in the air. Human beings have used bricks for a long time. As I have mentioned in my previous posts, Chinese people used bricks to build the Great Wall as early as in the Ming Dynasty(around 13^th century). At that time, however, bricks were made by hands and its productivity was very low. To meet the increasing need for bricks, people in industrial period invented the brick making machine. However, modern people are more and more dissatisfied with the speed of the traditional brick making machine. Fortunately, now we finally witness the appearance of a new type of brick making machine: the high speed automatic brick making machine.

As the name of the invention shows, the new ones are not only high-speed but also automatic. An automatic machine for pressing bricks at high speeds is provided with a pressure wheel and pressing tongues attached to the circumference of the wheel through an axle which permits the tongues to rotate or swing about the axle. Clay material is fed to an endless belt comprising a plurality of moulds, pressed by the pressure wheel, and then conveyed to a release station. The railing for the endless belt has an expanded portion so that the end walls of the moulds are released outwardly as they pass this portion, allowing the pressed brick to drop to another belt to be sent to an oven.

A high speed automatic brick making machine comprising:

(a) a pressure wheel having at its circumference brick pressing tongues said tongues being free to rotate and each being attached to said wheel by means of an axle passing through the tongue, the ends of the axle being fixed to the circumference of the pressure wheel;

(b) a plurality of moulds disposed on an endless belt, said moulds having a pair of side-walls and a pair of expandable end walls, said moulds corresponding to said press tongues the press tongues reducing the height of the material in the moulds by about one half, the railing for the endless belt having an expanded portion whereat the end walls expand to release the compressed brick contained within the mould after compression;

(c) a hopper for feeding clay to the moulds; and

(d) driving means for said pressure wheel and endless belt.a