Machine is a horizontal machining center Huakai, machining hole size is 14mm through hole, the first with 13.5 bits, then the 14 hinge reamer, reamer is 120 speed 320 feed speed, casting hardness is HB170 ~ 241, made out of the hole often bell shaped, reamer blade also day after day grinding, grinding or not, sometimes for a new reamer like bell. Who can help me analyze the reasons?.
The allowance is large. Use the 13.8 reamer to enlarge the table. Hit the blade to see if the blade is on the same heart. Measure both the front and back blades.
You are using a high speed steel cutter, for hard alloy - increase the rigidity decreases beating!!
I said you are so talented! Leave 0.5 of the remaining material! More than 13 of the drill bit is taper shank drilling, 0.5 mm a specification. But our experience shows that all the following 4MM are left in excess of 0.1MM. 4MM more than 0.2MM remaining material. To help you develop the process; hit the center drill - with D8 drill THR through; - 13.5 drill reaming - using D8 milling round processing, inverted 13.8THR (through) - with D8 milling round processing, DEP (depth) 8MM as a guide. Dimensions are guaranteed to be around 13.95 with 14 reamer G81 instruction S120F100 plus coolant. Not in place, you cut me. There are reamer, you do not go grinding; kill you do not rub; 14 of the reamer should be welded machine reamers? You see, the front bevel is not a chamfer. It's a cutting edge. It's a guiding role. After grinding, it's almost useless. We can use a reamer for a long time. And did you see the deflection of the reamer on the tester? Machine reamers, yaw, no-load control in 0.02, you can easily guarantee to +0.01 to +0.015. Reamer S320, when used as a milling cutter? The reamer must not be twisted at high speed, while the iron is cut at high speed without enough time to remove it. Cause extrusion deformation; twisted holes are generally large and small. Generally speaking, you don't have any big problems with 1000/D. D is the reamer size
You left a 0.5 margin. Less leave allowance and try your next hit indicator reamer
