Flattening Machine Knowledge

The flattening machine is composed of one mechanism parts, and the mutual movement of the mechanism parts becomes the law of motion of the flattening machine.

How to choose the mechanism parts of the flattening machine is to choose the most suitable mechanism parts according to the tasks to be done by the machine.

The function of the machine is mainly realized by the motion form and motion law of the follower, so the motion of the follower must be selected based on the motion required by the machine.

For example: require continuous rotation, choose crank for the follower; require a certain range of swing, choose rocker for the follower; require reciprocating movement, choose slider for the follower; require a Yin plane movement, choose linkage for the follower.

According to the characteristics of the power source of the flattening machine to choose the original moving parts, the original moving parts are directly accepting the external supply of power components, so should be selected according to the characteristics of the power source. For example, if the machine is driven by rotary motor, the component (crank) of the rotating side is selected as the original moving part; if the machine is driven by moving hydraulic cylinder, the component (slider) of the moving side is selected as the original moving part, etc.

According to the adjustment method and arrangement of the work rollers, the structure of the work rollers has the following basic forms.
1、 Each upper roller can be adjusted separately in height. Each upper roller has a separate bearing seat and press down adjustment mechanism to ensure arbitrary adjustment of height. In addition, it is usually possible to move the upper part of the frame relative to the lower part for collective adjustment. High straightening accuracy can be obtained. However, the structure is complex, so in practice the number of rolls is generally small.

2、 Collective parallel adjustment height of the upper row of rollers. The upper row of rollers is fixed on a parallel lifting beam, which can only be adjusted collectively up and down in parallel, so the rollers have the same amount of pressure down, and the structure is relatively simple. However, this adjustment method can only be used with a smaller (or even the smallest) effective bending deformation to get a higher straightening accuracy, otherwise a larger residual curvature will appear. To solve the above disadvantages, usually the entrance and exit upper rollers are individually adjusted. This structural solution is widely used in the straightening of medium-thick plates.

3、Collective tilt adjustment of the upper row of rollers. The upper row of rolls is installed on a tilt-adjustable beam, and the bending of the rolls from the entrance to the exit gradually decreases, which can achieve large deformation and small deformation of the two straightening schemes, and can obtain a high straightening speed, and the adjustment is also very convenient, so it is widely used.

The exit section of the flattening machine is inclined arrangement, increasing the large deformation process of the entrance section of the mill, which can improve the quality of straightening. The other is a parallel arrangement in the middle and an inclined arrangement at both ends, which not only improves the straightening quality, but also improves the bite into the conditions and acts as a reversible straightening.

There is a correct way to use a piece of equipment, the correct use can make the machine have a better use effect.

The sleeve roller chain of flattening machine is composed of outer chain plate, inner chain plate, pins and rollers. The inner chain plate and the sleeve, the outer chain plate and the pin are fastened with interference fit respectively; the gap fit between the sleeve and the pin can be freely rotated relative to each other to adapt to the flexion and extension of the chain when entering and exiting the sprocket. Since the wear of the chain mainly occurs between the pin and the sleeve, a small gap should be left between the inner and outer chain plates so that the lubricant can penetrate into them.

The distance between the center line of two adjacent pins of the flattening machine is called the pitch. Pitch is the main parameter of the chain, its size directly reflects the bearing capacity and size of the chain, such as the load is large, in order to reduce the size of the small pitch double-row chain or multi-row chain can be used. However, the more rows there are, the more uneven the bearing of each row is, so generally it should not exceed 3 or 4 rows.

It is hard to avoid the wear and tear when the flattening machine is in use. Engineering is considered normal wear as long as the wear rate can be controlled within the permitted range, i.e., the amount of wear does not exceed the permitted value within the predetermined life span. Grinding reduces the height of the higher of the micro-convex weight, the peak is worn away, the actual contact area increases, and the wear rate decreases.