Effect analysis of pulling gauge and front gauge set in laminating machine
In a plane coordinate system, any point can be represented by its coordinates, and conversely, the coordinates of any point can also be expressed in a plane coordinate system.
Pull gauge is the disposal of Y axis direction of the scale
The front gauge is the scale dealing with the X-axis direction
A common way to pull a gauge
1 Two tangent rollers pull the paper to a fixed position by rolling.
Meanwhile, the lower roller rolls 360 degrees, and the upper roller is forced to follow. Under normal circumstances, it is necessary to quench the lower roller, and the upper roller is used with rolling bearings with dustproof covers. Because the paper is more or less covered with dust and paper hair, if these dust or paper hair enter the bearing, it will inevitably affect the sensitivity of the bearing, and also affect the normal operation of the drawing gauge.
2 A roller, a strip way.
The roller moves up and down, controlled by a CAM, which can regulate the up and down time.
The rack is also operated by a CAM that regulates the back and forth moment.
3 A roller and a fan plate.
The paper roller moves up and down, and the fan plate swings back and forth.
We are now part of the machine pulling rules are two roller way, automatic laminating machine pulling rules are attributed to the third way.
Two ways to pull the characteristics of the gauge
1 Two roller type: the lower roller for rotating movement, the upper roller pressed down, on the beginning of the paper, on the contrary, the upper roller lifted, the paper through. This way is relatively simple, the layout only needs a CAM control, conditioning is also relatively simple.
2. The drawing gauge selected by the laminating machine is slightly messy. The upper paper roller is controlled by a CAM, and the lower is the knurled roller, which is controlled by another end CAM to complete the paper pulling mission when it wobbles back and forth. It is worth noting that the laminating machine can not be adjusted at the next moment only by the roller, CAM to cooperate. In addition, it is necessary for the roller below to have a high hardness, and to be concentric, not to have the appearance of beating.
In addition, the pulling force of the paper is always greater than the 'supporting force' of the paper. So how to regulate the size of the tension, so that it is just right? The top, to rely on experience, heart exploration, constantly summarize. Second, ensure by planning. Because the laminating machine is not very high demand for drawing gauge, and mainly thick paper.
Our debugging personnel and device personnel should carefully study the working principle and layout of pull gauge, so as to be able to deal with all kinds of questions in practice.
Three before the gauge part set
1. The effect of the front gauge sleeve is to ensure the accuracy of the X-axis direction.
On the laminating machine, the front gauge conditioning, is to ensure the correct 'buckle' important link.
Laminating machine has 6 front gauge, the 6 front gauge should be adjusted to the same plane, concave and convex root common (relative panel). Before the rise and fall of the rules to be flexible, but not loose appearance. The four sides of the front gauge should be lubricated, wear-resistant, and the oil circuit should be smooth.
2. The primary effect of the gauge wheel is to send out the paper that has been positioned. The two front gauge wheels should be able to roll sensitively, but not slosh from side to side. The left and right front gauge wheels should be adjusted to the 'weight' common, and the adjustment should be repeated to fine-tune them to reach the common, so as to ensure that the 'buckle' is fundamentally common.
Four pull gauge, front gauge, the connection between the paper wheel
We have a fundamental understanding of the pull gauge, the front gauge and the effect of the paper wheel, now to comment on the connection between the three.
First of all, adjust the gauge part of the set, the lower knurling wheel just to the 'body' rolling, the above pressure wheel just down the pressure on the next knurling wheel, there is a certain pressure between the two, together with the above pressure wheel rolling, the paper should be between the upper and lower pressure wheel, is pulled to the 'body'. This is the paper pulling action.
I think the first thing to find a fundamental point, that is, the pulling action is finished, pulling the paper CAM has just lifted up, the distance between the upper and lower wheels is a piece of paper. Take this point as a benchmark to adjust the front gauge and the feed wheel. When the top of the gauge drops to a sheet of paper above the panel, the gap between the feed wheel and the feed roller below shall also be the thickness of a sheet of paper. Together with the investigation of paper feeding in the front of the paper is not the appearance of "bow up", the paper is not smooth, and then make micro adjustment.
How to make sure that each piece of paper is pulled in the right direction:
As said earlier, the tension of the gauge is probably greater than the support of the paper, and it is necessary to patiently adjust the pressure of the compression spring. When the paper is pulled to the specified position, that is, the 'backer', the paper roller is about to stop rolling, commonly known as' skid ', the gauge has a knurled screw, is used for regulating the compression spring. The rotary screw regulates the pressure of the compression spring, so that the direct contact of the upper and lower rollers produces pressure (overpressure), which is the tension of the paper. When the lower roller rolls, the paper can be pulled.
In physics, the force of friction is equal to the positive pressure times the coefficient of friction. The outer circular knurling of the lower roller is intended to increase the coefficient of friction. When pulling the paper, if you feel the appearance of "pulling too far", you can adjust the knurled screws behind to reduce the positive pressure.
When we investigate the pull gauge pull paper, the gap between the pressing paper row and the following board should be 3 times the paper to be coated. If there is no pressure board above this, the gauge will be too much when pulling paper.
When the thin paper for thick paper, to adjust the gap between the two plates: rotate a knurled screw in front, you can adjust the above one plate to lift or down. At this moment, as the upper pressure wheel with the upper pressure plate lifted, the gap between the upper pressure wheel and the lower roller is also increased, the pressure between them is also reduced together, in order to maintain the pressure to meet, it is necessary to adjust the eccentric shaft at the upper pressure wheel, to ensure the positive pressure to meet. Also adjust the knurled screw behind together, the length of the compression spring.
