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    How do the cutting tools teach you how to check the quality of the blade welding?

    Word:[Big][Middle][Small] QR Code 2017/11/17     Viewed:    


      In order to weld quality, the tool after welding should be carefully checked in order to find out the cause of the defect and improve it. Check before turning to the sand or gently rubbed in the blade surface adhesion of solder and impurities, and cleaned with kerosene. The items and requirements for the inspection are as follows:

      1. Inspection of weld strength:

      Wear a green silicon carbide grinding wheel to wear the rear of a lathe tool and check the thickness of the solder layer. The thickness is less than 0.15 millimeters. No pores and solder are insufficient at the bottom of the tool tip, and the welds not filled should not be more than 10% of the total length of the weld. If there is an air hole, the blade will fall off when cutting.

      2.Check the position of the blade in the knife slot.

      If the blade dislocation and droop exceed the technical conditions, heavy welding shall be carried out.

      3. Check the welding strength:

      Use a wood hammer or a copper hammer to strike a blade with a medium strength or hammer with a I hammer, when the blade does not fall off from the slot to be qualified. Check the strength of the blade welding, not necessarily check one by one, but also use the sampling method.

      4.check the blade evenness:

      If there is a clear dent on the blade, the blade is overheated and the new blade should be burned down.

      5. Check the crack:

      After the blade is cleaned by kerosene, if the blade has cracked kerosene, it penetrates into the crack and appears black line, and can be observed with the naked eye. It can also be observed with a magnifying glass of 10-40 times.
    Check the blade crack, also can use the color flaw detection method: use 65% kerosene, 30% transformer oil and 5% turpentine solution, slightly add Sudan red. Place the tool blade part in the solution for 10-15 minutes, then rinse it with water, and coat with a layer of clay (kaolin). After baking, observe the surface. If there is a crack on the blade, the color of the solution will appear on the clay, and it can be seen with the naked eye. The cracked blade is not used and needs to be re welded.
      In addition to several commonly used car 7J welding method introduced above, also useful oil protection, electric furnace, forging furnace and brazing with reductive gas furnace method, there is no detailed introduction.

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