taper-face toolholders€¦ · product range – workpiece side type. copyright © seco tools ab ....

TAPER-FACE TOOLHOLDERS

Copyright © Seco Tools AB

Introduction

Influences of the machine tool on a machining process

• Current requirements are very high for production companies.

Machining time and process reliability are key factors in production.

– A winning solution requires optimised performance of the machine tool.

– The machine tool interface influences performance. However, when new

investments are made, users often don’t give enough importance to the

choice of the interface. Some tests or specific analysis are only done partially

for certain applications but rarely for a complete machining process with

different requirements.

• In this process, there are two interfaces to take into account:

1. The interface machine – toolholder

2. The interface toolholder – cutting tool

2


Introduction

The optimal interface: machine - toolholders

• In order to have the best machining results, the interface

machine - toolholder must have maximum rigidity. This can be

achieved by:

– reducing the overall length of the toolholder

– Increasing the bearing surface e.g.: a contact with both cone and

face, means Taper-Face.

• In some machining processes, an important success factor is the

precise positioning of the tool edge.

3


Introduction

Requirements for toolholders

• Rigidity

• Clamping technology

• Tightening force

• Transmittable torque

• Stability and smoothness of functioning

• Balancing quality

• Repeat accuracy

• Run-out precision

• Vibration absorption

• Ease of use

• Lifetime

• Cost

4


Introduction

The new range of Taper-Face tooling allows Seco to completely

equip machine-tools with Taper-face spindle systems.

• Taper-Face spindle system connection types are BT TF, CAT TF and DIN

TF.

5

– BT TF spindle connection, also called BBT, is

the most popular worldwide, mainly in the

Asian market.

– CAT TF spindle connection is common in the

NAFTA market.

– DIN TF spindle connection is mostly only

used in Europe.

PR

INC

IPLE

– H

OW

IT

WO

RK

S


Connection Illustration:

Taper-Face vs. Conventional taper

7

TAPER-FACE SPINDLE

Gap Dual contact

Taper-Face

holders

Conventional

SA taper


Principle – how it works

The Taper-Face Spindle System uses elastic deformation of the

machine spindle to achieve simultaneous fit of both taper and

flange face from holder.

• During assembly just before complete clamping, the clearance between

the taper and face contact is 0.02 mm.

8

Clearance just before clamping is 0,0008 inch; 0.02 mm.


Principle – How it works

The Taper-Face Spindle System utilises elastic deformation of

the machine spindle to achieve simultaneous fit of both taper

and flange face from holder.

• Machining position: Taper & Face contact due to elastic deformation

9


Concept – Conventional taper vs.

Taper-Face

The taper and face simultaneous contact results from a remarkable

improvement of rigidity against bending in relation to the Ø:

10

Ø 63

Clearance

Ø 44.5

Example:

BT 40 Conventional

vs.

BT 40 Taper-Face

With EPB 5600

shrinkfit, reinforced

type and tool

Ø25 mm.

The face

contact

provides a

minimum of

four times

more rigidity

for taper sizes

30, 40 and 50.

Min 4 x more rigidity

Rigidity vs. flexion in relation to the Ø: Taper size 30: Ø 31,75 to 46 mm; (46)⁴/(31,75)⁴= 4,4 ; for taper size 30 rigidity increased up to 4,4 times. Taper size 40: Ø 44,45 to 63 mm; for taper size 40 rigidity increased up to 4,0 times. Taper size 50: Ø 69,85 to 100 mm; for taper size 50 rigidity increased up to 4,2 times.


Concept – Why use a Taper-Face

contact instead of Conventional taper?

With Conventional taper, during machining at high speed

rotation, a machine spindle expands due to centrifugal force

and heat and pulls the toolholder in.

• Variation of projection length in Z axis

• Dilation due to heat

With Taper-Face contact, the toolholder is not pulled into the

machine spindle even at high speed rotation because the flange

face fits the machine spindle nose.

• Variation of projection length in Z axis is eliminated

• Dilation due to heat will always exists

11


Concept – Why use a Taper-Face

contact instead of Conventional taper ?

The difference is evident during machining. Below is a

comparison of the Z axis at high speeds using BT TF 40

Conventional and Taper face contacts.

12

0

10

20

30

40

50

60

70

1 5 10 15 20 25 30

Va

ria

tio

n o

f p

roje

ctio

n l

en

gth

s

fro

m h

old

ers

in

th

e Z

ax

is (

µm

)

Rotation speeds (x1000)

Taper-Face

Standard

0.019 mm

0.032 mm

0.046 mm Gap in mm


Summary – Taper-Face knowledge

Technical characteristic differences between the Taper-Face vs.

Conventional contact:

• Higher rigidity due to larger contact diameter

– Minimum of four times more vs. steep taper, especially for long overhang

• Improved repeatability after Automatic Tool Change

• Elimination of axial movement at high speeds

– Higher run-out precision, better machining accuracy

• Taper-Face tooling can be used on conventional steep taper spindles but

it looses the face contact advantages.

13

PR

OD

UC

T R

AN

GE

–

WO

RK

PIE

CE

SID

E T

YP

E


Product range – Workpiece side type

15

PRODUCT RANGE Machine Side connection

Code Type Technology at Workpiece Side 30 40 50 40 50

5555 Steadyline™ Shell mill holders X √ √ √ √

5525Shell mill holders with through coolant

channels√ √ √ √ √

584 Weldon - End mill holders √ √ √ √ √5603 Shrinkfit holders, DIN type √ X X √ √

5600 "P"Shrinkfit holders, reinforced type.

"P" Safe-Lock™ systemX √ √ √ √

5672 High precision collet chuck, 3 µm √ √ √ √ √5835 Hydraulic chuck, strong X √ √ X X

5675 ER collet chuck, 10 µm X √ √ √ √K820 Steadyline™ Combimaster holders X X X √ √5820 Combimaster holders √ √ √ √ √401 Graflex® modular holders √ √ √ √ √

5191 Seco-Capto holders √ √ √ √ √

BT Taper-Face size CAT Taper-Face size

MA

RK

ET

OV

ER

VIE

W


Market overview

Asia Pacific tooling systems market – feedback for

Machine Tool Builders:

• BT 40 Taper-Face and BT 50 Taper-Face spindle system

– DECKEL MAHO

– DOOSAN

– MAKINO

– MATSUURA

– MAZAK

– MORI SEIKI

– OKUMA

– STAMA

– YASDA

– Etc.

17


Market overview

NAFTA tooling systems market – feedback for Machine

Tool Builders:

• BT 30 Taper-Face spindle system for MTB

– FANUC Robodrill

– DMG Mill/Tap

– BROTHER Speedio

– Etc.

• CAT 40 & 50 Taper-Face spindle for MTB

– MORI SEIKI

– MAZAK

– Etc.

18

MO

UN

TIN

G P

OS

SIB

ILIT

Y


Mounting possibility for Taper-Face

holder

It is possible to fit a Taper-Face holder into a Conventional Steep

Taper spindle, however, the face contact advantages are lost

because of the clearance after mounting and locking.

20


Mounting possibility for Taper-Face

spindle

It is possible to fit a conventional SA toolholder into a Taper-

Face spindle, however, the the Face contact advantages will be

lost because of the a clearance after mounting and locking.

21


Taper-Face Tooling range

Launched in update catalogue 2016 -1, February 1st, 2016.

Released for sales November 11th, 2015.

22

taper-face toolholders€¦ · product range – workpiece side type. copyright © seco tools ab ....

Documents