Общий каталог Yamawa 2022 - 2023 - страница 1231

Selecting different tap holder combinations by machine feed systemSelecting different tap holder combinations by machine feed system 23.23. Selecting different tap holder combinations by machine feed systemSelecting different tap holder combinations by machine feed system

The function of machine feed systemsThe function of machine feed systems

Fully synchronous feed (Rigid) tapping systemFully synchronous feed (Rigid) tapping system

Spindle revolution and machine feed are synchronized, a perfect thread lead Spindle revolution and machine feed are synchronized, a perfect thread lead and feed per revolution are realized.and feed per revolution are realized.

Feed by lead screwsFeed by lead screws A better-feed condition is realized because the tap is fed by a master lead A better-feed condition is realized because the tap is fed by a master lead screw shaft that has the same thread lead as this tap.screw shaft that has the same thread lead as this tap.

Feed by gearFeed by gear

The tap is fed at the same thread lead by a combinations of gears. This creates The tap is fed at the same thread lead by a combinations of gears. This creates a better-feed to thread lead condition.a better-feed to thread lead condition.

Characteristics of tap self-guiding behaviorCharacteristics of tap self-guiding behavior

Holders aspectsHolders aspects

r=tap’s radius, s=thread relief, t=margin widthr=tap’s radius, s=thread relief, t=margin width Eccentric thread reliefEccentric thread relief (no width of margin)(no width of margin)

CompressionCompression TensionTension Spring directionSpring direction

Completely rigid holder typeCompletely rigid holder type Tap characteristics ; high cutting performance and machin-Tap characteristics ; high cutting performance and machin- The tap is held with no axial or radial The tap is held with no axial or radial ing performance, with little to no self-guiding features. ing performance, with little to no self-guiding features. adjustment in the collet and holder.adjustment in the collet and holder. Operation ; A fully synchronous machining system with fixed Operation ; A fully synchronous machining system with fixed rigid holder is needed.rigid holder is needed. Example : "High speed tapping" and "fully synchronous Example : "High speed tapping" and "fully synchronous tapping."tapping."

Con-eccentric thread relief Con-eccentric thread relief (margin and thread relief)(margin and thread relief)

Asynchronous feed systemAsynchronous feed system Best used when the spindle rotation and the machine feed are set Best used when the spindle rotation and the machine feed are set independently, especially, if the machine feed value cannot be accurately independently, especially, if the machine feed value cannot be accurately predicted to be that of the tap thread lead.predicted to be that of the tap thread lead.

Hydraulic or Pneumatic pressure feed systemHydraulic or Pneumatic pressure feed system

Feed is controlled by a pressure regulation system which normally results in an Feed is controlled by a pressure regulation system which normally results in an inaccurate feed per revolution compared to the tap thread lead.inaccurate feed per revolution compared to the tap thread lead.

Adjustable spring floating holderAdjustable spring floating holder (Tension & Compression)(Tension & Compression) Tap ; High level of self-guidance due to suitable tap diameter Tap ; High level of self-guidance due to suitable tap diameter margin and thread relief. The combination of nice portion of margin and thread relief. The combination of nice portion of Machine feed and tap's thread lead Machine feed and tap's thread lead margin and chamfer relief helps to make appropriate tap guidance.margin and chamfer relief helps to make appropriate tap guidance. errors are corrected by two types of errors are corrected by two types of spring system in the holder, the axial spring system in the holder, the axial tension direction of the tap and the tension direction of the tap and the Concentric (No relief)Concentric (No relief) axial compression direction of the tap.axial compression direction of the tap.

Manual feedManual feed Feed is controlled by operator which is difficult to keep a stable amount of feed Feed is controlled by operator which is difficult to keep a stable amount of feed per revolution.per revolution.

Tap ; A full thread land stays in contact with the thread major Tap ; A full thread land stays in contact with the thread major Technical Inf diameter at all times. Tap has no thread relief on major diameter at all times. Tap has no thread relief on major diameter, creating a high level of self-guidance even with diameter, creating a high level of self-guidance even with unbalanced feeding conditions.unbalanced feeding conditions.