Общий каталог Yamawa 2022 - 2023 - страница 1233

The mechanism for a tap to cut oversize on an internal threadThe mechanism for a tap to cut oversize on an internal thread 24.24. The mechanism for a tap to cut over size on an internal threadThe mechanism for a tap to cut over size on an internal thread

1. Run out, misalignment and tap cutting in non perpendicular to holes1. Run out, misalignment and tap cutting in non perpendicular to holes Over-cutting at radial directionOver-cutting at radial direction 3. Tapping with an improper feed condition3. Tapping with an improper feed condition over-cutting at axial directionover-cutting at axial direction

Tapping a non-parallel or non-perpendicular Tapping a non-parallel or non-perpendicular Process of over-cutting due to excessive feedProcess of over-cutting due to excessive feed Tool run out during tappingTool run out during tapping Misalignment during tappingMisalignment during tapping thread to the axis of the hole.thread to the axis of the hole.

running.running. WorkpieceWorkpiece Cutting part by b1Cutting part by b1

holder with floating holder with floating features will reduce this features will reduce this Lateral forceLateral force problem.problem. SolutionsSolutions

Not Go gaugeNot Go gauge Excessive-cutting of the thread Excessive-cutting of the thread

misalignmentmisalignment TapTap with excessive feedingwith excessive feeding

RRun outun out Position between workpiece and tap after the tap rotates 1 turn.Position between workpiece and tap after the tap rotates 1 turn. Excessive cutting in radial direction causes oversized internal threads. Since tapping proceeds along bored hole, Excessive cutting in radial direction causes oversized internal threads. Since tapping proceeds along bored hole, Distance of Distance of in the depth of hole, oversize cutting is minimized, that is, oversize cutting in the beginning of the hole and in the depth of hole, oversize cutting is minimized, that is, oversize cutting in the beginning of the hole and excess feedingexcess feeding normal cutting in the depth of the hole.normal cutting in the depth of the hole. WorkpieceWorkpiece

Excessive-cutting in the radial directionExcessive-cutting in the radial direction Normal internal threadsNormal internal threads

Cutting trace by b1Cutting trace by b1 Not Go gaugeNot Go gauge TapTap Over sized Over sized NormalNormal internal threads internal threads Not Go Not Go

Not Go gaugeNot Go gauge internalinternal gaugegauge internal threadsinternal threads

at the beginning at the beginning threadsthreads of the boreof the bore Position between workpiece and tap after the tap rotates 2 turns.Position between workpiece and tap after the tap rotates 2 turns.

WorkpieceWorkpiece Distance of Distance of excess feedingexcess feeding 2. Using a tap not suitable for the operation or a tap with dull2. Using a tap not suitable for the operation or a tap with dull Over-cutting caused by galling and excess cuttingOver-cutting caused by galling and excess cutting cutting edge may cause galling and result in over-cutting. cutting edge may cause galling and result in over-cutting. TapTap Using an incorrect tap for a specific workpiece material Using an incorrect tap for a specific workpiece material Tapping process with dull edgeTapping process with dull edge can cause problemscan cause problems

WearWear WeldingWelding ChippingChipping

Select the correct TapSelect the correct Tap FlankFlank ・・Straight fluted tapStraight fluted tap The position between workpiece and tap after 3 rotations of tap.The position between workpiece and tap after 3 rotations of tap. ・・Spiral fluted tapSpiral fluted tap Over-cutting of the thread by Over-cutting of the thread by ・・Spiral pointed tapSpiral pointed tap too slow feedingtoo slow feeding

・・Roll tapRoll tap Not Go gaugeNot Go gauge ParallelParallel Process Opposite of excessive Process Opposite of excessive

【【WearWear】】 wearwear 【【WeldingWelding】】 【【ChippingChipping】】 WorkpieceWorkpiece Distance of Distance of

excess feedingexcess feeding feeding Factors in fluencing extra feeding Factors in fluencing extra Selection of correct taps suitable for material being Selection of correct taps suitable for material being material is cut at back frank.material is cut at back frank. tapped is strongly recommended.tapped is strongly recommended. Solution: Proper use of cutting oil, confirmation of a constant for tool lifeSolution: Proper use of cutting oil, confirmation of a constant for tool life

over-cutting during tappingover-cutting during tapping TapTap Incomplete Incomplete The tap mounting condition in the holder.The tap mounting condition in the holder. Torn threads occur on the thread flanks. If this Torn threads occur on the thread flanks. If this threadthread

inspection should not miss this kind of trouble.inspection should not miss this kind of trouble. Incomplete Incomplete threadthread synchronous feed system, such as drilling machine.synchronous feed system, such as drilling machine. Not Go gaugeNot Go gauge Technical Inf ＊＊Adjust the correct weight balance of main spindleAdjust the correct weight balance of main spindle

properly.properly. ＊＊Use an axial/radial floating holder for adjustment.Use an axial/radial floating holder for adjustment.