Основной каталог Kyocera 2021 - 2022 - страница 259

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Toolholders for back turning - TKFB insert Chip control improvement in back turning

Chip control improvement by tool pass changes - 1 Chip control improvement by tool pass changes - 2 Roughing with grooving tools Pre-Stage machining is processed with solid end mill 1. GMM2420-020MW (Grooving) 1. Solid end mill

Roughing

EE

When using TKFB12R28010M (for back turning / right hand) When using TKFB12R28010M (for back turning / right hand)

Finishing (Countermeasures 1) Use right-hand toolholder

Advantages:

Advantages: 1. Minimal deflection in long machining passes

  • Good surface roughness 2. Chips are broken into small pieces, though the workpiece material is sticky

Disadvantages: Disadvantages:

  • If a machining pass is long, the guide bush can not support the workpiece.
  • The pre-stage machining may cause fractures, because of interrupted machining

When using TKFB12L28010M (for back turning / left hand) When using TKFB12L28010M (for back turning / left hand)

Finishing (Countermeasures 2) Use left-hand toolholder

Advantages:Advantages:
1. Good surface roughness1. Minimal deflection in long machining passes
2. High precision machining if the machined portion does not contact the guide bush.2. Chips are broken into small pieces, though the workpiece material is sticky.
Disadvantages:3. High precision machining if the machined portion does not contact the guide bush.
  • If a machining pass is long, the guide bush can not support the workpiece. Disadvantages:
  • The pre-stage machining may cause fractures, because of interrupted machining.

Countermeasure against peeled surface in face back turning

When peeled surface occurs on the workpiece face, please apply the countermeasures below.

Countermeasures 1 Face finishing Countermeasures 2 Face finishing after grooving

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