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Repair plan for broken edge of hard alloy drill bit
Date:2025-12-03 14:01     Source:daokedao     Browse:48

After the hard alloy drill bit breaks, it is directly scrapped using traditional methods, resulting in a cost loss of 500-2000 yuan per unit. Daokedao adopts the process of "micro melting+blade passivation", using WC Co hard alloy powder with a spot diameter of 0.05mm to accurately repair the broken blade area. The rounded corner of the blade is controlled at 0.02-0.03mm to avoid secondary breakage. The hardness of the cladding layer is HV1600, which is 95% consistent with the original drill bit material, and the drilling accuracy error is ≤ 0.01mm. The repair cost of the Φ 10mm hard alloy drill bit is 150 yuan, and the service life is 70% of that of the new drill bit. It is suitable for drilling difficult to machine materials such as stainless steel and titanium alloy. After application in a certain aviation parts factory, the scrap rate of drill bits decreased from 30% to 5%, saving 120000 yuan in annual tool costs, increasing drilling efficiency by 15%, and reducing hole wall roughness from Ra1.2 μ m to Ra0.6 μ m. The equipment is equipped with a specialized positioning fixture for drill bits, which supports repairing drill bits with different top angles (90 °, 120 °).

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