Drilling and Deburring of bore Ø21.0 mm

Descripción

The Korean gear manufacturer was looking for a solution to machine and chamfer/deburr three different bores of shell rr annulus connector of a 8-shift-gear in one setup. This report covers the drilling and deburring of the bores with Ø21.0 mm.

First, the customer wanted to solve the aluminium version. Later, the steel annulus is planned to follow.

Application details

Application details

  • Bore: Ø21.0 mm
  • Material thickness: 4.0 mm
  • Material: ADC 10
  • Machine: Magnix Tapping Center

Proposed solution

Proposed solution

HEULE recommended a customized combined COFA drilling and deburring tool (GH-C-O-10247 with drill GH-1C21T-21.0) with COFA12 deburring blade (GH-C-M-0087, spring W-type). First, it is drilling the hole, then deburring the front bore edge. After passing through the hole, it is deburring the back bore edge while retracting the tool at working speed (without stopping the spindle).

Machining parameters:

  • Cutting data drilling:
    Speed: 200 m/min 
    Feed: 0.2 mm/rev.
  • Cutting data deburring:
    Speed: 45 m/min.
    Feed: 0.4 mm/rev.
  • Coolant: external coolant

Customer benefits

Customer benefits

The advantage of this solution are the economies in machining time by combining three process steps to on single operation. The resulting cost savings are considerable.