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Thread: Welding on Vibrating Screen Sideplates?

  1. #1
    George Baker

    George Baker

    Vice President- Corporate Communications

    Assinck Ltd. [eDir]

    Assinck Ltd.

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    Welding on vibrating screen sideplates?

    Is there anything special i should be doing before welding or?

  2. #2
    George Baker

    George Baker

    Vice President- Corporate Communications

    Assinck Ltd. [eDir]

    Assinck Ltd.

    Professional Experience 39 Years / 9 Month George Baker has 39 Years and 9 Month professional experience

    Discussions 883 George Baker acceded to 883 discussions, Articles 0 George Baker wrote 0 articles, Publications 0 George Baker Baker released 0 publications

    Searching nothing specified

    Know-How Screening (373) George Baker used this tag 373 times, Manufacturer (110) George Baker used this tag 110 times, Conveying (28) George Baker used this tag 28 times

    Welding procedures on vibrating screen sidewalls or sideplates...

    The first rule is vibrating screen manufacturers recommend generally DO NOT WELD. But, alas......sideplates crack and go bad during mid season operations and welding sometimes is just plain necessary.

    Most people.......just FILET weld the whole crack only to come back the next day and find it cracked beside the weld again.

    The procedure if you must weld repair............
    1) Drill hole at end of crack if there is one, stops cracking from continuing onward
    2) gouge out and clean cracked area
    3) pull both sides in a parallel even flat plane if possible
    4) skip weld or stitch weld, basically weld an 1" skip and 1", etc etc to end of crack, then go inside and weld where you skippped
    5) if need be, apply fishplating across skip welded area, but also skip weld the patch on, NOT FULL FILET WELD
    6) Consider tac welding some key stock at 12, 3, 6, 9 o'clock positions around the bearing housings to STOP any minuet movement from re-cracking the fix.

    Key to remember: If you full weld, you actually create a "heat Check" which the accelerating forces in the machines pick up as a "weak spot" and crack out. HEAT must always be keenly controlled if welding on a vibrating screen sideplate. Key stocking the hsg keeps this large bore area and weak spot in the sideplate tight and non-moving.

    Lastly, ORDER NEW SIDEPLATES AND INSTALL ASAP

    Moderator: George Baker

  3. There may be many important things about welding. One of the important requirements for welding in screens is to have stress relieving by annealing and welded joint should really have mechanical characteristics close to that of the parent metal.

    Regards,
    Ishwar G Mulani.
    Author of Book : Engineering Science and Application Design for Belt Conveyor.
    Email : parimul@pn2.vsnl.net.in
    Tel.: 0091 (0)20 5882916

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