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CNC Burnishing Machine Overview

The document describes the Strausak Mikro ST 119 CNC burnishing machine. The machine uses two rotating tungsten carbide discs to burnish the pivots and shoulders of watch and instrument gears. The pivots are held in notches while the discs remove 0.005-0.01mm of material to achieve a surface finish of Ra 0.1-0.3μm. The CNC control allows 4 diameters and shoulders to be machined simultaneously, increasing productivity over conventional burnishing machines. Options include manual or automatic drum/magazine loading systems and pneumatic unloading of finished parts.

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308 views7 pages

CNC Burnishing Machine Overview

The document describes the Strausak Mikro ST 119 CNC burnishing machine. The machine uses two rotating tungsten carbide discs to burnish the pivots and shoulders of watch and instrument gears. The pivots are held in notches while the discs remove 0.005-0.01mm of material to achieve a surface finish of Ra 0.1-0.3μm. The CNC control allows 4 diameters and shoulders to be machined simultaneously, increasing productivity over conventional burnishing machines. Options include manual or automatic drum/magazine loading systems and pneumatic unloading of finished parts.

Uploaded by

Jayakrishna
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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www.strausak-mikro.

ch

BURNISHING MACHINE ST 119 CNC

lebernstrasse 63 - ch-2540 grenchen - mail@strausak-mikro.ch - +41 (0) 32 644 31 44


APPLICATION

Burnishing is a finishing process for bearing pivots and their shoulders of watch and
instrument gears. The workpiece lies with its two pivots which are to be burnished, in profiled
notches of tungsten carbide flanges and is driven by a carrier in the correct rotational direction.
By means of two rotating, lapped, tungsten carbide discs, the machining process takes place,
creating a burnished surface finish. The amount of stock removed depends on the size of the
pivot diameter is between 0.005 and 0.01 mm and attains a surface finish of Ra 0,1 und 0,3 µm
(N3, N4). When using ceramic or degussit discs the machining method becomes a pure
grinding process reaching greater stock removal.

lebernstrasse 63 - ch-2540 grenchen - mail@strausak-mikro.ch - +41 (0) 32 644 31 44


MACHINE AND TECHNOLOGY

DESIGN

The design of the machines is extremely stable and vibration free. The ST 119 CNC
can be ordered on a machine base or as a table mounted version.
Thanks to the CNC control 4 diameters and shoulders can be machined in one
operation, increasing the productivity enormously when compared to a
conventional machine.

lebernstrasse 63 - ch-2540 grenchen - mail@strausak-mikro.ch - +41 (0) 32 644 31 44


MACHINE AND TECHNOLOGY

MACHINE CONTROL

The machine is equipped with an OMRON


CNC control, which thanks to a touch
screen is very pleasant to operate. The
user interface, is easy to operate thanks to
operator prompt software. The control
needs a very short tuition time. The
control contains a number of different
burnishing operations, which can be
altered and extended according to the
needs of the customer.

lebernstrasse 63 - ch-2540 grenchen - mail@strausak-mikro.ch - +41 (0) 32 644 31 44


OPTIONS AND LOADING UNITS

MANUAL LOADING

In the case of small batches, the


machine can be loaded manually .
The loading system for manual
loading comprises, wooden arm-
rests, a box for the parts to be
machined and a drawer for the
finished parts.

DRUM LOADER W20

This loader is used for shaft type


pinions.

lebernstrasse 63 - ch-2540 grenchen - mail@strausak-mikro.ch - +41 (0) 32 644 31 44


OPTIONS AND LOADING UNITS

STRAUSAK LOADER TYPE 28

With this loader the majority of workpieces


can be efficiently and automatically loaded.
When the workpiece is changed one merely
exchanges the magazine and the gripper on
the loading arm.

SUCTION UNLOADING

With the pneumatic suction


device, the parts are unloaded
without problem.

lebernstrasse 63 - ch-2540 grenchen - mail@strausak-mikro.ch - +41 (0) 32 644 31 44


TECHNICAL DATA

WORKPIECE

Pivot Diameter mm 0.06 – 2.00


Pivot Length (Maximum) mm 4.00
Shoulder Distance (Maximum) mm 25.00
Workpiece Length mm 40.00

WORKIN RANGE

Burnishing Disc Diameter mm 62


Speed of Burnishing Discs rpm 400 – 1‘000
Speed of the Workpiece rpm 200 - 500

MACHINE DIMENSIONS

Length x Width x Height mm 800 x 900 x 1‘800

WEIGHT

Machine kg 300

lebernstrasse 63 - ch-2540 grenchen - mail@strausak-mikro.ch - +41 (0) 32 644 31 44

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