Method for fast and correctly drilling decussation hole of center pin
A criss-cross and accurate technology, which is applied in the field of fast and accurate drilling of center pin cross holes, can solve the problems of easy running of the drill bit and unguaranteed position, and achieve the effect of improving production efficiency and ensuring precision
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[0011] Reference figure 1 , The present invention directly drills two φ8 holes on the M58 thread of the center pin 1, including the following steps:
[0012] (1) First screw the drill mold 2 to the thread M56×4-6h of the center pin 1, and then set the drill sleeve 3 on the drill mold so that the end face 4 of the drill sleeve and the step surface 5 of the center pin are in close contact;
[0013] (2) Draw a cross line on the end face of the drill mold, rotate the center pin on the V-shaped iron 6, find the level at points A and B with the scoring disc, then clamp the workpiece, and drill the φ8 hole at the 67.5 position;
[0014] (3) Rotate the center pin 90 degrees on the V-shaped iron, use the marking plate to find the level at points D and E, then clamp the workpiece, and drill the φ8 hole at position 77.5.
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