Description of Shredder Blade Process

For the quality of the shredder blade, the welded shredder blade should be carefully inspected in order to find out the reasons for the shortcomings and improve them. Before inspection, the shredder blade should be sandblasted or quietly ground to remove the solder and impurities adhering to the surface of the blade, and cleaned with kerosene. The items and requirements reviewed are as follows:

1. Check the strength of the weld, use a green silicon carbide grinding wheel to grind the back of a shredder knife, check the thickness of the solder layer, and the thickness is required to be less than 0.15 mm. There should be no air holes and lack of solder on the bottom surface of the blade tip support. The welded seam that is not filled with solder should not be greater than one-tenth of the total length of the welded seam.

2. Check the position of the shredder blade in the kerf, if the blade is dislocated and sagging exceeds the technical conditions, it should be re-welded.

3. Check the welding strength, use a wooden hammer or a copper hammer to strike the blade with medium force, or use a hammer to strike the blade with a strong force. At this time, the blade does not fall from the groove, which is qualified. Check the blade welding strength, you do not need to check one by one.

4. Check the flatness of the shredder blade. If there are obvious pits on the blade, it means that the blade is overheated and deformed, and a new blade should be burned and re-welded.

5. Check for cracks. After the shredder blade is cleaned with kerosene, if the blade has cracks. The kerosene penetrates into the cracks and black lines appear, which can be investigated with the naked eye or with a magnifying glass of 10-40 times. Check blade cracks, and color flaw detection can also be used. Put the blade part of the turning tool in the solution for 10-15 minutes, then wash it with water, apply a layer of white clay, and check its appearance after drying. If there are cracks on the blade, the color of the solution will be revealed on the white soil. , It can be seen with the naked eye that the cracked shredder blade cannot be used and needs to be re-welded.

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