After casting, planing, and clamping boring, before the final assembly is the main bearing hole, with four edges of the anchor wire hole, and is often not parallel with the spindle drill, and the control is not good, there will be inclined, after assembly, solution and support holes can't match, how to do it can be done symmetrically. And to ensure that the same side of the anchor wire hole parallel to the spindle, then?Once a model, is bearing the ground plane style, has small eyes in the four hole position, through the eye, and then drilling, but there are errors!
My idea is to drill the hole first and then to drill the plane at the center of the hole. The car with the seamless tube two yuan ---+-------+---, defended the discus discus through boring bearings at both ends, with a pair of V shaped iron support, out of the discus concentric steel pipe draw center line positioning, and then to the center line parallel and boring. Reuse template after processing.
1) after the heat treatment, the first dimensional arrangement should be made, taking into account the allowance of the machined surface, the location of the non machined surface and the location of the important screw holes;2) then draw the bottom as the base plane;3) locate the bottom with a machined surface and clamp the bore;4) clamping to the center bore as above, as a benchmark, in the boring machine by coordinate shift, accurate processing of each installation hole bottom (positioning accuracy of common boring machine could reach 0.02 0.05mm, if it is a processing center, the positioning accuracy can reach 0.005mm);5) on the boring machine, with a good bearing, installation holes and end face positioning, on the machined bottom surface to find the correct table, through coordinate displacement, processing the anchor screw hole.The above process method can guarantee the processing of qualified workpieces, but the cost of drilling holes is higher than that of using the rocker arm.
