Vibrating screen side plate cracking don't be afraid, a few simple steps easy to fix! (With specific processing steps)

vibrating screensSide panels cracking do not have to be afraid of, a few simple steps easy to fix! (With specific processing steps)

Long-term operation of the vibrating screen, prone to such problems, the beam will break, the track beam will also break, the side plate will also produce cracks, the beam and the track beam, through the replacement of the problem can be solved, but the side plate cracks, if the use of welding treatment, because the welding stress can not be eliminated, and will soon be cracked again, then how to do in the face of this problem, may wish to try the following said Then what should be done in the face of this problem, you may try the following treatment method.

01 Difficulties in dealing with cracks in side panels

The frame structure of the vibrating screen is riveted to each other with the help of riveting bolts, if you replace the cracked side plate, that is, the side plate shown in Figure 1, firstly, you have to remove hundreds of riveting bolts on the side plate, which is a huge amount of work; and secondly, you have to replace the side plate and then riveted again, which is just like reassembling a screen. There was neither the space nor the time to do so.

Fig. 1 Side panel cracks

If a simple welding process is carried out, which involves the addition of a plate (as shown in Figure 2), given that there is no way to eliminate the welding stresses in the side plates, not only will it not work well under vibration conditions, but it will also lead to an increase in the extension of the cracks or to the appearance of other new cracks.

Fig. 2 Extra plate welding to deal with side plate cracks

02 Side panel crack treatment technology

The main technology is for the side plate processing ah, that is, welding requirements, and weld processing, as well as increase the reinforcement plate to riveting it. For the cracks on the side plate, to go through the necessary cleaning, but also after shaping, and then bevelling welding, welding is completed to eliminate stress, and then clean up the weld, grinding, and finally covered with reinforcing plate, riveted bolts riveted, and then carried out for the local strengthening treatment.

03 Specific treatment

(1) Firstly, the hexagonal bolt coupling in the cracked area was checked for reliability. Then, remove the riveted bolts from the angles on both sides of the side plate as well as the upper reinforcing plate, followed by checking the condition of the damage between the angles and the mating surfaces on the plate. Finally, when the surfaces were satisfactory, it was ensured that the cracked ends of the side plate were aligned, see Figure 3.

Fig. 3 Side panel cracks aligned at both ends

(2) Grind a bevel along the centre of the crack, over the entire length (inside of the sieve), see Figure 4.

Fig. 4 Bevelling at cracks

(3) Weld the cracks perpendicular to the direction of the screen plate, without swinging the welding torch, and divide it into 2 sections to carry out the welding work, and use the needle gun to strike after each weld to eliminate the stress and slag, see Fig. 5.

Fig. 5 Perpendicular weld in the direction of crack and screen plate

(4) Weld continuously vertically, striking each weld with a pin gun until the weld is complete, see Figure 6.

Fig. 6 Continuous vertical welding

(5) Trim and polish welds until the surface is flat and flush with the surface of the side plate, see Figure 7.

Fig. 7 Grinding and polishing weld seams

(6) Grinding of the welds is carried out on the outside of the screen, to minimise the amount of grinding at the weld, just clean the weld and make the base material of the side plate visible, and then carry out the welding as if it were on the inside, corresponding to Figs. 8 and 9, respectively.

Figure 8 Outside sanding

Figure 9 Outside welding

(7) Sand the outside of the side panels flat, see Figure 10.

Fig. 10 Side panel outer side sanded flat

(8) Grind and shape the hole at the top of the side plate, which is on the weld seam, making sure that all burrs have been removed and that there are no defects of grooves and dents, which can be seen in the relevant diagram in Fig. 11.

Figure 11 Sanding the holes in the top of the shaping side plate

(9) In the finishing area, sand the coatings cleanly, then apply primer to the side panels and primer to the reinforcing panels, on both sides. Next, place the reinforcement plates on the inside of the screen and install as many bolts as possible. The reinforcing plate is going to cover both sides of the weld repair area, see, just like in Figure 12. The dashed part of the picture is the reinforcement plate.

Figure 12 Placement of reinforcement plates

(10) After the bolts have been tightened, holes are drilled in the reinforcing plate to ensure that the cracks are covered, and the riveted bolts are fitted into the holes and tightened, as in Fig. 13.

Figure 13 Enhanced drilling

(11) The repair area is located at the top of the side panels, which is sanded, as are the angles and the inside of the side panels, which are then primed. The inner angle is reinforced with a reinforcement plate, which is riveted by at least three riveting bolts on each side of the weld, as shown in Figure 14.

Figure 14 New reinforcing plate on the inside angle

(12) After all riveted bolts have been riveted, apply topcoat to the repaired area. After the paint has dried, seal the perimeter of the reinforcement plate with SIKA adhesive to prevent corrosion.

There is a solution that is simple and easy to implement and saves time. At present, after the repair of the screen machine, have been running for some years, there is no more cracks, through the practice of this maintenance programme has confirmed the feasibility and reliability. If your vibrating screen structure is similar, after the side plate cracking problem, you may want to try the above method.