Hydraulic Metal Radial Drilling Machine

What are the reasons and elimination methods for the workpiece aperture and roundness of the radial drilling machine :(1) The clearance between the spindle sleeve and the box guide sleeve is too large. The sleeve should be trimmed and the guide bushing replaced. (2) The axial movement of the spindle is too large. The back of the spindle should be adjusted to reduce the axial clearance and ensure that it is within 0.01mm. (3) The spindle taper hole and the drill taper handle are not well matched. The cast iron Morse cone is used to grind the cone hole to ensure that the contact area with the standard inspection mandrel is not less than 70%. (4) Workpiece clamping too tight or improper clamping parts, resulting in workpiece deformation. The clamping part should be selected reasonably to clamp the workpiece correctly. (5) The repetition accuracy of the clamping part is poor and the clamping is not firm. The clamping parts should be re-adjusted to ensure repeated positioning accuracy and firm clamping. (6) There are burrs or scratches in the spindle cone hole, causing the bit to tilt. Use a scraper to trim the burr or copy part of the inner cone hole to ensure that the radial circular runout error of the axis line of the cone hole is less than 0.02mm by the spindle end.

(7) The length of the main cutting edge of the drill is different. The drill should be re-sharpened correctly to ensure that the length of the main cutting edge is consistent, and the cutting edge is symmetrical and sharp.