Electric hammer drill bit cold-headed part molding process
A molding process and drill bit technology, which is applied in metal processing equipment and other directions, can solve the problems of small mold force and long service life of the mold, and achieve the effect of small force on the mold, improving the service life of the mold, and improving the service life
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[0014] Such as Figure 6 As shown, the cold heading part of the electric hammer drill formed by the present invention is composed of the drill shank body 1 of the upper section, the drill body body 3 of the lower section and the arc transition section 2 connecting the upper and lower sections. For the electric hammer drill bit of M8, the drill The outer diameter of the shank body 1 is 11.87mm, and the outer diameter of the drill body 3 is 7.27mm.
[0015] The forming process of the electric hammer drill cold heading part of the present invention includes the following forming steps: ① The wire diameter of the finished wire raw material after drawing is less than 0.35mm or more than the external diameter of the drill shank. For the M8 electric hammer drill, the finished wire The wire diameter of the raw material can be 11.5mm; ②The surface of the finished silk raw material is phosphating, and a phosphating layer is formed on the outer surface of the finished silk; ③The finished...
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