Lost Wax Investment Casting Of Eccentric Components Of 600 Lasting Machine

Product Introduction

An eccentric wheel, as the name suggests, means that the center of the wheel is not at the point of rotation. It generally refers to a circular wheel. When a circle does not rotate around its center, it becomes an eccentric wheel. The eccentric is also a type of cam. Generally speaking, the main purpose of the eccentric is to generate vibration. Like electric sieves and vibrators in mobile phones, eccentrics are used. Most eccentrics are round wheels because they are round. The wheel is easy to manufacture and the process is simple.

Eccentric wheel, is a wheel whose shaft hole is biased to one side. When it is mounted on a shaft and rotates, the outer edge of the wheel pushes another part. Produces reciprocating motion. It is mostly used to drive mechanical switches, valves, etc.

The difference with cam: Lost Wax Investment Casting of Eccentric Components of 600 Lasting Machine itself is a kind of cam. The curve form used by the cam is different due to different action requirements, and the cam method adopted is also different due to different installation position requirements. The same, so there are many types of cams. To put it simply, if they are not circular and rotate around the center, they are almost all considered cams. And the cam is not necessarily eccentric. For example, an oval that rotates around the center is also a cam.

Eccentric mechanism

Enlarging the size of the rotating pair is a common mechanism evolution method with practical application value. The larger the diameter of the rotating pair, the higher its strength and the better the rigidity of the mechanism. When the length of the crank in the crank slider mechanism is relatively short, it is impossible to increase the diameter of the rotating pair at the connection between the crank, the connecting rod, and the frame. In order to make the kinematic pair in the mechanism have a relatively high strength and improve the rigidity of the mechanism, usually increase The secondary radius of rotation at the connection between the crank and the connecting rod is made larger than the length of the crank, evolving the crank into an eccentric. Take the slider-crank mechanism shown in Figure 1(a) and the crank-rocker mechanism shown in Figure 1(c) as examples. Expand the radius of the rotating pair B at the connection between the crank AB and the connecting rod BC, and make the enlarged radius of the rotating pair larger than the length of the crank AB (see Figure 1 (b) and Figure 1 (d)), then Figure 1 (a) The crank 1 in Figure 1(c) has evolved into an eccentric disc whose geometric center B does not coincide with the rotation center A, which is called an eccentric. The eccentric is equivalent to enlarging the journal size of the rotating pair B at the connection between the salt handle and the connecting rod. Therefore, the strength of the components and kinematic pairs in the mechanism and the stiffness of the mechanism are significantly increased. The distance (eccentricity) between the two centers A and B in the eccentric is equal to the length of crank 1, and its motion characteristics are exactly the same as crank 1. The mechanism after the crank evolves into an eccentric is called an eccentric mechanism.

Figure 1 Crank evolution eccentric

When the power transmitted by the mechanism is relatively large, or the crank pin (rotating pair) bears a relatively large load, or the crank length is relatively short, or the follower stroke is relatively small, the crank is often made into an eccentric. This evolution of structural dimensions will not affect the motion properties of the mechanism and avoids structural design difficulties caused by the inability to install two rotating pairs at both ends of the crank due to the short length of the crank. For example, the crankshaft in the piston reciprocating mechanism of an internal combustion engine functions like an eccentric; all planers use eccentric mechanisms. In addition, eccentric mechanisms are often used in forging equipment, air compressors, shears, punches, stamping machines, plunger pumps, and other machinery.

Figure 2 Mechanism evolution based on size changes of kinematic pairs

Changing the size of the kinematic pair is also a way to evolve the mechanism. Figure 2 vividly expresses the evolutionary relationship between the size of the kinematic pair and the type of mechanism. If the arc moving radius between slider 3 and the frame in Figure 2(a) is reduced, and slider 3 is evolved into a rod, then the circle between slider 3 and the frame in Figure 2(a) The arc moving pair evolves into the rotating pair C connecting the connecting rod 2 and the rocker 3 in Figure 2(b). By enlarging the radius of rotating pair B in Figure 2(b) and making it greater than the length of crank 1, crank 1 evolves into the eccentric wheel in Figure 2(a).

Detection Systems

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