How do you weld the car knife
On the handle according to the need to use milling machine processing the blade installation Angle plane, needed to put the blade, with welding flame heating and put on borax flux, the copper electrode into welding seam, after checking the blade position right, stop heating.
Welding torch up 20-30 mm, copper wire from the top of the blade and the clearance of the cutting tools, with the flame straight wire, welding wire melting, and then quickly using flame around the slit purging, outflow bright copper liquid in the gap, adjust the Angle of the cutting tools at this time, leave the flame. The copper in the head of the knife is solidified, the color is dark red, put in the heat preservation box, the heat preservation will be used after 24 hours. Above, I hope it will help you.
Apply dark red to the body, heat copper electrode, and remove the solder (borax) and apply it to the head. Borax, which melts into liquid as the temperature rises, seeps into the gap between the head and the blade, and if the knife swipes, the penetration is good. Both the body and the head of the knife are red.
Use neutral flame when welding, and the energy size is chosen according to the size of the vehicle. 2, when heated, flame core distance blade 3-5 mm, heated the blade, cutting head is heated with embers, (segment of small size, easy to heat, the temperature is too high, the oxidation of the cutting tools);
