How to check the welding quality of the splitter cutter
Sub-machine cutting knife has become an indispensable tool in people's lives, and it has become a product of limited quality. The sub-machine cutting knife is closely related to people's life and encourages national finance. Then the sub-board cutter is finally what?
In order to ensure the welding quality, the welded lathe should be observed carefully in order to find reasons for correction. Before inspection, the lathe must be sandblasted or lightly rubbed off the solder and impurities adhering to the blade profile and cleaned with kerosene. Neat. The names and conditions of inspections are as follows:
First, check the weld strength: use a green silicon carbide grinding wheel on the back of a turning tool, check the thickness of the solder layer, the thickness requirements of 0.15 mm or less. No support at the bottom of the blade hole and the appearance of the loss of the solder, solder is not filled The full weld should not be more than 10% of the total length of the weld. If there is a blowhole, the insert will fade when it is cut.
Second, check the blade in the sipe's identity: If the blade is misaligned and sags the ancestors of the requirements of the regulations. Should be re-welding.
Third, check the welding strength: with a wooden hammer or copper hammer to beat the blade with a flat force, or I hammer to struck the arbor, then the blade does not fall off from the sipe qualified. Check the blade welding strength, not necessarily one by one Check all, also select sample checks.
Fourth, check the blade flatness: if the blade has a clear pit, the paper blade overheat deformation, should be burned under re-welding new blades.
5. Check the cracks: If the blade is cleaned with kerosene, if the blade has cracks, the kerosene penetrates into the cracks and flashes black lines, which can be observed with the naked eye. It can also be observed with a 10-40 times magnifying glass.
Check blade cracks, can also be used to look flaw detection method: the use of 65% kerosene, 30% of the transformer oil and 5% turpentine tune the solution, add some Sudanese. Put the knife blade part in the solution 10-15 Minutes, then wash with water, apply a layer of white clay (kaolin), bake for thousands of hours to observe the surface, if there is a crack on the blade, the color of the solution will appear on the clay, appear with the naked eye. Cracked blades cannot be used and must be renewed.
In addition to the above description of several commonly used car 7J welding methods, but also effective oil protection, electric furnace, forging furnace and furnace with reducing gas brazing method. Here's a brief introduction.