1 problems: aperture increases, the error is large
Cause
The reamer diameter size design value is too large or hinge cutting edge burr; the cutting speed is too high; the amount of feed improper or excessive machining allowance; reamer reamer main angle is too large; bending; hinge cutting edge attachment of built-up edge grinding; cutting edge hinge pendulum difference; inappropriate choice of cutting when the installation of liquid; reamer taper shank surface oil is not clean or cone is knocking; taper flat tail deviation in the spindle after taper cone interference; axis bending or spindle bearing too loose or damaged; floating reamer is not flexible; and different workpiece axis and hand reaming with uneven force. Reamer shaking.
Solving measures
According to the specific circumstances of reamer od decreasing; cutting speed; adjust the feed rate or reduce machining allowance; reduce the main angle; the bending straightening reamer or scrap can not be used; with an oilstone carefully shaped to qualified; control of swing in the allowed range; selection of cutting fluid cooling performance better; reamer must be installed the reamer with taper shank and machine tool spindle taper internal oil wipe, cone bump with hone repair light; grinding flat tail, adjust or replace the reamer; spindle bearing; re floating clamping head, and adjust the concentricity; note the proper operation.
2 problems: aperture reduction
Cause
Reamer OD value is small size design; the cutting speed is too low; the feed is too large; the reamer main angle is too small; improper cutting fluid; grinding reamer wear not wear off, to reduce diameter of elastic recovery; steel hinge, margin is too large or the reamer is not sharp, easy to produce elastic recovery. The aperture and hole Buyuan, aperture unqualified.
Solving measures
Replace the reamer diameter size; increasing cutting speed; due to lower feed; increasing the main angle; selection of cutting oily liquid lubrication performance is good; regular exchange of reamer, correct grinding cutting reamer; design of reamer size, should consider these factors, or according to the actual situation of value; test cutting, take the appropriate allowance the sharp, reamer.
3 problems: the hinge hole Buyuan
Cause
The reamer is too long, lack of rigidity, vibration reaming reamer; the main angle is too small; the cutting edge hinge with narrow margin; reaming deviation; the surface of the inner hole gap, cross hole; hole surface blisters, porosity; spindle bearing loose, without the guide sleeve or reamer and the guide sleeve with the gap is too large, because thin walled workpiece clamping tight, deformation of the workpiece after discharge.
Solving measures
The lack of rigid reamer reamer unequal tooth pitch points, reamer installation should use rigid connection, increase the main angle; selection of qualified reamer, hole position tolerance control pre process; the unequal pitch reamer, with longer and more accurate guide; selection of qualified blank; using pitch reamer reaming a precision machine tool spindle hole, to adjust the gap, the gap with the guide sleeve should be higher or adopt appropriate clamping method, reduce the clamping force.
4 problems: the inner surface of the hole has a clear edge
Cause
Reaming allowance is too large; the reamer cutting part after angle is too large; the hinge with cutting edge width; surface pores, trachoma and spindle swing too large.
Solving measures
Reduce the hole margin; reduce the back angle of the cutting part; the width of the grinding blade; select the qualified blank; adjust the spindle.
5 problems: high surface roughness value
Cause
The cutting speed is too high; improper cutting fluid; reamer main angle is too large, the hinge cutting edges are not in the same circumference; reaming allowance is too large; reaming allowance is not uniform or too small, not to the local surface hinge; reamer cutting part pendulum difference, blade is not sharp, rough surface; hinge with cutting edge width; reaming reamer when the chip is not smooth; excessive wear; reamer bumps, edge left burr or edge collapse; cutting edge has a built-up edge; because of the material, does not apply to zero or negative rake angle reamer.
Solving measures
Cutting speed; cutting fluid according to the material selection process; reduce the main angle, correct grinding hinge cutting edge decreasing; reaming Reaming allowance; improve the position accuracy and quality before the bottom or increase the selection of qualified reaming allowance; reamers; grinding edge width; according to the specific situation to reduce the number of teeth reamer. Increase the groove space or the reamer with cutting edge inclination, the chip successfully replaced regularly; reamer grinding, grinding abrasion in the grinding zone; reamer use and transport process, protection measures should be taken to avoid bumping; of the hinge knife has a bruised, with super fine aggregate will hurt repair or replace the reamer, reamer; stone for dressing to qualified, the reamer angle of 5 degrees to 10 degrees.
6 problems: the low life of reamer
Cause
The reamer material is not suitable; when the reamer is burnt in the grinding, the cutting fluid is not suitable, the cutting fluid can not flow smoothly, and the surface roughness value is too high after cutting and cutting.
Solving measures
According to the material selection of reamer processing materials, can be made of hard alloy reamer reamer or coating; avoid burns to strictly control the grinding cutting, often according to the correct choice of materials; cutting fluid; often remove the cutting crumbs slot, cutting liquid enough pressure, after fine grinding and grinding requirements.
7 problem: the hole position accuracy is too poor
Cause
The bottom of the guide sleeve is too far away from the work piece; the length of the guide sleeve is short, the precision is poor, and the bearing of the main shaft is loose.
Solving measures
Replace the guide sleeve regularly; lengthen the guide sleeve to improve the matching precision of the guide sleeve and the reamer clearance
