IEMCA BOSS 542 CNC Instruction manual

REL. DATA COD.
S/N
BOSS 542 CNC
BOSS 542r CNC
MINI BOSS 325 CNC
MINI BOSS 325r CNC
MANUAL FOR USE AND MAINTENANCE
GB
4 01/06/98 336005410

302.034
IEMCA S.p.A.
48018 - Faenza (RA) - ITALY
Via Granarolo, 167
Tel. [phone] - Fax. [phone] ufficio commerciale
0546/46224 centralino
TLX 550879
BOSS 542 CNC
BOSS 542r CNC
MINI BOSS 325 CNC
MINI BOSS 325r CNC
AUTOMATIC BAR FEEDER WITH
HYDRAULIC SUSPENSION
MANUAL FOR USE AND MAINTENANCE
GB

1
302.034
INDEX
1GENERAL INFORMATION
1.1. MANUAL PURPOSE ......................................3
1.2. MANUFACTURER AND BAR FEEDER
IDENTIFICATION ...........................................4
1.3. TECHNICAL ASSISTANCE............................4
1.4. ANNEXES ENCLOSED ..................................4
2TECHNICAL INFORMATION
2.1. GENERAL BAR FEEDER DESCRIPTION .....5
2.2. OPERATING CYCLE - GENERAL
DESCRIPTION ...............................................7
2.3. SAFETY DEVICES .......................................10
2.4. SAFETY PLATES - LOCATION AND
DESCRIPTION .............................................11
2.5. VERSION DESCRIPTION ............................12
2.6. TECHNICAL SPECIFICATIONS...................13
2.6.1 Noise levels....................................................17
2.7. FITTINGS - FOREWORD .............................18
2.7.1 Bush-holder device - Description.....................18
2.7.2 Axial displacement device - Description...........19
2.8. DEVICE FOR SLIDING HEADSTOCK
LATHES - FOREWORD ...............................20
2.8.1 Bar/headstock synchronizing
device - Description ........................................20
2.8.2 Telescopic nose - Description .........................20
2.9. DEVICES FOR CAM
LATHES - FOREWORD ...............................21
2.9.1 Headstock return device - Description .............21
2.9.2 Cam box - Description ....................................21
2.9.3 Camshaft release device - Description ............22
3SAFETY PROCEDURES -
GENERAL INFORMATION
3.1. SAFETY GENERAL INSTRUCTIONS..........23
3.2. HANDLING AND INSTALLATION -
SAFETY PROCEDURES..............................23
3.3. ADJUSTMENTS AND SETTING
UP - SAFETY PROCEDURES .....................24
3.4. USE AND OPERATION - SAFETY
PROCEDURES.............................................24
3.5. BARFEEDERMAINTENANCE-SAFETYPROCEDURES
24
4HANDLING AND INSTALLATION
4.1. PACKAGING................................................ 25
4.2. LIFTING ....................................................... 25
4.3. INSTALLATION AREA -
CHARACTERISTICS ................................... 27
4.4. FEEDER WITHOUT AXIAL DISPLACEMENT
DEVICE - INSTALLATION ........................... 28
4.4.1 Support plates and feet - Installation ............. 28
4.4.2 Height - Adjustment ....................................... 29
4.4.3 Preliminary positioning................................... 30
4.4.4 Sleeve - Installation ....................................... 31
4.4.5 Levelling and alignment ................................. 32
4.4.6 Feeder fastening ........................................... 35
4.4.7 Telescopic nose - Installation ......................... 36
4.5. FEEDER WITH AXIAL DISPLACEMENT
DEVICE - INSTALLATION ........................... 37
4.5.1 Preliminary operations ................................... 37
4.5.2 Height - Adjustment ....................................... 37
4.5.3 Preliminary positioning................................... 38
4.5.4 Sleeve - Installation ....................................... 38
4.5.5 Levelling and alignment ................................. 39
4.5.6 Feeder fastening ........................................... 40
4.5.7 Telescopic nose - Installation ......................... 40
4.6. DEVICE FOR SLIDING HEADSTOCK
LATHES - INSTALLATION .......................... 41
4.6.1 Bar/headstock synchronizing device............... 41
4.7. DEVICES FOR CAM LATHES -
INSTALLATION ........................................... 42
4.7.1 Headstock return device ................................ 42
4.7.2 Cam box ....................................................... 43
4.7.3 Camshaft release device ............................... 44
4.8. LUBRICATING OIL - FILLING ..................... 45
4.9. ELECTRIC CONNECTION .......................... 45
4.10. PNEUMATIC CONNECTION....................... 46
4.11. ADDITIONAL PUSH-BUTTON
PANEL - INSTALLATION ............................ 46
4.12. SELF-LEARNING DIMENSIONS -
PROGRAMMING ......................................... 46
5ADJUSTMENTS AND SETTING-
UP
5.1. ADJUSTMENT AND SETTING-UP -
FOREWORD................................................ 47
5.2. GENERAL ADJUSTMENTS -
FOREWORD................................................ 47
5.2.1 Feeding chain - Adjustment ........................... 48

2
INDEX
302.034
5.2.2 Drive chains - Adjustment ...............................48
5.2.3 Clutch - Adjustment ........................................49
5.3. SET-UP ACCORDING TO THE BAR TO
BE MACHINED .............................................50
5.3.1 Guides, half bushes, bar-pusher and
collet - Replacement.......................................52
5.3.2 Clamps - Replacement ...................................60
5.3.3 Bar guide plates and bar selectors -
Adjustment .....................................................62
5.3.4 Clamps - Adjustment ......................................65
5.4. CAM BOX - TIMING......................................66
6USE AND OPERATION
6.1. PUSH-BUTTON PANEL - DESCRIPTION
OF CONTROLS ............................................69
6.2. ADDITIONAL PUSH-BUTTON PANEL -
DESCRIPTION OF CONTROLS ..................73
6.3. INDICATOR LIGHTS - DESCRIPTION
OF INDICATIONS.........................................73
6.4. BARS TO BE MACHINED -
CHARACTERISTICS AND
PREPARATION ............................................74
6.5. FEEDER SET-UP AND AUTOMATIC
CYCLE START .............................................75
6.5.1 Bar magazine - Filling .....................................75
6.5.2 Lubrication oil - Flow adjustment .....................76
6.5.3 Automatic cycle start ......................................77
6.6. FEEDER STOP.............................................78
6.7. AUTOMATIC CYCLE START AFTER
MANUAL CYCLE OPERATIONS .................78
6.8. AUTOMATIC CYCLE START - RESUMING
WORK AFTER POWER-OFF .......................79
6.9. MACHINING CHANGE - QUICK GUIDE ......80
6.9.1 Machining type change with guide
change-over ...................................................80
6.9.2 Machining change without guide
change-over ...................................................80
7BAR FEEDER MAINTENANCE
7.1. MAINTENANCE - GENERAL RULES ..........81
7.2. SCHEDULED MAINTENANCE.....................82
7.2.1 Revolving tip and collet - Check ......................82
7.2.2 Lubricating oil - Level check............................83
7.2.3 Lubricating oil - Change ..................................83
7.2.4 Clutch oil - Check ...........................................84
7.2.5 Clutch oil - Change.........................................85
7.2.6 Clutch disks - Wear check ..............................86
7.2.7 Guide opening screw - Greasing .....................87
7.2.8 Driving motor brushes - Wear inspection .........88
7.2.9 Air filter unit - Check ...................................... 89
7.3. AXIAL DISPLACEMENT DEVICE - USE ..... 90
8TROUBLES - CAUSES - CURES
8.1. GENERAL FAULTS ..................................... 91
8.2. BAR MAGAZINE - FAULTS ......................... 91
8.3. INSERTION IN THE COLLET - FAULTS..... 92
8.4. BAR FEEDING - FAULTS............................ 92
9PART REPLACEMENT
9.1. FEED CHAIN - REPLACEMENT ................. 93
9.2. PRIMARY CHAIN AND PINION -
REPLACEMENT .......................................... 93
9.3. GUIDE OPENING BELT -
REPLACEMENT .......................................... 94
9.4. EEPROM - REPLACEMENT ....................... 95
9.5. BOARD - REPLACEMENT .......................... 96
9.6. FEED MOTOR DRIVE - REPLACEMENT ... 98
9.7. RECOMMENDED SPARE PARTS .............. 99
INDEX ANALYTICAL ................................ 101

3
302.034
1
GENERAL INFORMATION
Before carrying out any servicing whatsoever on the bar
feeder, it is of the utmost importance to read this manual
carefully.
1.1. MANUAL PURPOSE
This manual has been written and supplied by the manufacturer
and is integral part of the bar feeder and of its equipment.
The compliance with the instructions contained herein ensures the
operator and bar feeder safety as well as a running economy and
a longer life of the bar feeder itself.
In order to allow a quick search of contents, consult the descriptive
index.
Particularly important parts of this manual have been highlighted
in bold type and preceded by the following symbols:
DANGER - WARNING: shows impending danger which
might cause serious harm, hence it is necessary to pay the
greatest attention.
CAUTION: n order to avoid accidents or damages to proper-
ty, suitable measures shall be adopted.
INFORMATION: Information: technical instructions having
particular importance.
In order to allow a quick search of contents, consult the descriptive
index.
Operations described in paragraphs showing this symbol,
must be performed by qualified and skilled personnel only. Any
other operation can be performed either by qualified personnel or
by professional bar feeder operators.

4
1
GENERAL INFORMATION
302.034
1.2. MANUFACTURER AND BAR FEEDER IDENTIFICATION
A- Manufacturer’s identification
B- CE conformity marking
C- Year of manufacture
D- Bar feeder model
E-Serial number
F-Feeding voltage
G- Mains frequency
H- Amperage
B- Alternate driving voltage
C- Direct driving voltage
D- Bar feeder weight.
INFORMATION: Always provide the Manufac-
turer with the above mentioned specifications in
order to obtain information or whenever ordering
spare parts, etc.
1.3. TECHNICAL ASSISTANCE
Whenever necessary, please apply to one of the Technical Assist-
ance Departments listed in the annex enclosed herein.
INFORMATION: As far as technical servicing relevant to the
bar feeder is concerned, always specify the technical data
printed nameplate.
1.4. ANNEXES ENCLOSED
Technical assistance departments list.
Collet summary tables.
Push-button panel instruction manual.
Wiring diagram.
Pneumatic diagram.
Lathe coupling instructions.
34.001 Ec. 0
A
D
F
B
C L H N
M
G
E

5
302.034
2
TECHNICAL INFORMATION
2.1. GENERAL BAR FEEDER DESCRIPTION
The BOSS automatic bar feeder is used in the machi-
ne-tool industry and in particular, for automatic lathe
feeding. It is particularly suitable for feeding fixed or sli-
ding headstock lathes, numerical control or cam la-
thes.
The working cycle is controlled by a control panel with
built-in PLC, which is able to dialogue with the lathe
control.
The main control digital push-button panel makes pro-
gramming easier. An additional push-button panel can
be detached to control the main functions without lea-
ving the lathe.
The bar feeder can be used to feed bars, pipes and va-
rious sections.
The guide channel is fully closed during machining; a
pump is provided to maintain a continuous oil flow insi-
de the channel, creating a hydrodynamic support ef-
fect; these characteristics allow the bar to rotate at a
high r.p.m. number, with no vibrations and no surface
damaging.
The use of a DC motor and of an electronically control-
led clutch make it possible to adjust the feeding speed
and thrust to ideal values at any time during the machi-
ning cycle.
Bar remnant ejection can be caused by bar-pusher fe-
eding or next bar feeding.
Bar feeder series BOSS are produced in the following
models:
MINI BOSS 325 CNC (standard version)
MINI BOSS 325r CNC (reversed version)
BOSS 542 CNC (standard version)
BOSS 542r CNC (reversed version)
To make the consultation of this manual easier, the na-
mes of the four models have been shortened as fol-
lows:
MINI BOSS CNC is shortened to MINI BOSS
MINI BOSS 325r CNC is shortened to MINI BOSSr
BOSS 542 CNC is shortened to BOSS
BOSS 542r CNC is shortened to BOSSr
The texts, tables and illustrations contained in this ma-
nual concern, unless otherwise stated, the standard
version (MINI BOSS and BOSS) with the lathe on the
operator’s right.
As for the reverse version (MINI BOSSr and BOSSr),
with the lathe on the operator’s left, do not forget that
the main parts are located on the opposite side, as
mentioned below.

6
2
TECHNICAL INFORMATION
302.034
❑
❑❑
❑Main parts
A - Magazine; where bars are stored.
B - Bar selection device; it allows the first
bar to be lowered into the guides and
holds back the remaining bars in the
magazine.
C-Guides; they guide the bars during ma-
chining.
D - Bar-pusher; it pushes the bar during
machining.
E - Feed chain; it transmits motion from the
drive system to the bar-pusher.
F - Drive system; it drives the bar-pusher.
G- Clutch; it transmits motion from the drive
system to the feed chain. It can be set to
obtain thrust adjustment.
H - Insertion/extraction drive; it drives the
bar feeder parts controlling bar insertion
into the collet and subsequent bar rem-
nant extraction. It also drives the bar
feeder parts controlling guide opening/
closing and bar selection.
B-Clamps; they hold the bar during bar in-
troduction in and extraction from the bar-
pusher collet.
C - Facing device; it sends a signal at bar
passage.
D - Remnant collection box; bar remnants
are dropped into this box after extraction
from the bar-pusher collet.
F - Lubricating pump; it delivers oil to the
guides.
G - Oil recovery device; it collects oil flowing out of
the guides.
H - Main push-button panel; feeder functions are
programmed and controlled from this panel.
I - Additional panel; it makes it possible to control
the main feeder functions without leaving the
lathe.
J - Electric cabinet; it contains the electric switch-
board.
K-Lathe
3
4.002 Ec. 1
QN
L A
F
B
P
G
C
E
D
H
UM
S
R
T
Q N
LA
F
B
P
G
C
E
D
H
U M
S
R
T
(reverse version)
BOSS - MINI BOSS
BOSSr - MINI BOSSr
(standard version)

7
2
TECHNICAL INFORMATION
302.034
2.2. OPERATING CYCLE - General description
In the automatic operation mode, bar feeder movements are con-
trolled in the sequence described below:
The bar-pusher A feeds bar B in the lathe
by following lathe impulses until bar end.
The bar-pusher A and remnant C are in
their forwards limit stop position.
The bar-pusher Aand remnant Creach their back-
wards limit stop position.
The clamps Dclose and the bar-pusher moves back;
the remnant is extracted from the collet. The clamps
open and the remnant is dropped into the box E.
34.142 Ec. 0
AB
34.012 Ec. 0
A
C
34.013 Ec. 0
A
C
D
D
E
CA

8
2
TECHNICAL INFORMATION
302.034
Clamps Dclose again to perform remnant Eextraction
check.
If the remnant is still inserted in the bar-pusher collet,
the feeder stops; otherwise, it continues its cycle.
The bar selection device F goes up: all the bars in the
magazine are held back except the first bar G.
The upper guides Hand the bar-pusher L are opened;
the bar G is dropped into the guide.
The small pusher truck M starts its stroke.
34.006 Ec. 0
G
F
34.007 Ec. 0 G L H
34.014 Ec. 0
E
D
D
34.008 Ec. 0
M

9
2
TECHNICAL INFORMATION
302.034
When the small pusher truck M com-
pletes its stroke, the required space has
been created for bar-pusher insertion.
The small pusher truck executes its re-
turn stroke.
The upper guides H are closed; the bar-pusher Lis po-
sitioned along the spindle axis.
The clamps Dclose, the bar-pusher Lmoves for-
wards; the bar Gis inserted into the bar-pusher collet.
The bar selection device Fis lowered.
The bar-pusher A and bar G execute
their facing stroke. A new automatic work
cycle is started.
34.009 Ec. 0
L
F
H
34.010 Ec. 0
L
G
D
D
34.141 Ec. 0
M
M
34.011 Ec. 0
A G

10
2
TECHNICAL INFORMATION
302.034
2.3. SAFETY DEVICES
A - Emergency button S85; by working it, all feeder
and lathe functions are stopped in an emergency
situation.
B - Emergency button S86; by working it, all feeder
and lathe functions are stopped in an emergency
situation.
C - Interlocked mobile guard: associated with mi-
croswitch S61.
According to the selected cycle, its functions are:
manual cycle; when the guard is opened, the feeder
and lathe functions are stopped. By closing the guard,
the operator can restart the cycle; automatic cycle;
- during the bar feeding phase, the guard is opened
to refill the magazine. There are no risks for the
operator in the involved area even if the feeder
and lathe functions are not stopped.
- during the bar change-over phase, feeder and
lathe functions are stopped when the guard is
opened. The operator can restart the cycle by
closing the guard. There are no risks for the
operator in the involved area even if the feeder
and lathe functions are not stopped.
D - Fixed guard: it is made from transparent material
to allow visual inspection of the bar magazine ar-
ea.
E - Fixed guard: it prevents accidental access to the
bar selection area.
F - Fixed guard: it prevents accidental access to the
drive area.
G - Fixed guard: it prevents accidental access to the
drive belt area.
H - Remnant collection tank: it also acts as a fixed
guard to prevent accidental access to moving parts.
B - Fixed guard: it prevents accidental access to the
bush-holder device.
34.003 Ec. 0
E
F
G
D
S61C
L
A - S85
S85 S86 S61
B - S86
H

11
2
TECHNICAL INFORMATION
302.034
2.4. SAFETY PLATES - Location and description
A-Danger of upper limb crushing.
B-Caution! Moving parts.
C-Do not remove the safety barriers.
D-Wear safety gloves and shoes. Do not lift loads
exceeding 15 kg manually.
E-Caution! Danger of electric contact.
34.004 Ec. 0
C
B BC
B
AD
CC B
C
E
A B C
D E

12
2
TECHNICAL INFORMATION
302.034
2.5. VERSION DESCRIPTION
Table 1. Maximum bar length
Model Version Max. length mm (ft)
MINI BOSS
BOSS
32 3200 (10,5)
37 3740 (12,2)
44 4400 (14,4)
Table 2. Max. bar-pusher extension
Model Version A- Max extension (mm)
MINI BOSS
BOSS
N937
L1267
LL 1597
34.005 Ec. 0
A

13
2
TECHNICAL INFORMATION
302.034
2.6. TECHNICAL SPECIFICATIONS
(*) Without axial displacement device, the minimum dimension can be reduced to 850 mm.
Table 3. Overall dimensions
Model Version A(mm) B(mm )
MINI BOSS - BOSS
32 3750 1327
37 4290 1867
44 4950 2527
34.015 Ec. 1
MINI BOSS
BOSS
*
*
MINI BOSSr
BOSSr
*
*

14
2
TECHNICAL INFORMATION
302.034
Table 4. General technical specifications
MINI BOSS BOSS
Round bar diameter ø min 3mm
(1/8”)
ø max 25 mm
(1”)
ø min 5 mm
(3/16”)
ø max 42 mm
(1”21/32)
Hex bar diameter ø min 3mm
(1/8”)
ø max 22 mm
(7/8”)
ø min 4,4 mm
(11/64”)
ø max 36 mm
(1”13/32)
Max bar length
mod 32 - 3200 mm (10,5 ft)
mod 37 - 3740 mm (12,2 ft)
mod 44 - 4400 mm (14,4 ft)
mod 32 - 3200 mm (10,5 ft)
mod 37 - 3740 mm (12,2 ft)
mod 44 - 4400 mm (14,4 ft)
Magazine capacity (working width) n.26 barre ø 10 mm (3/8”) n.28 barre ø 10 mm (3/8”)
(Adjustable) feeding speed max 750 mm/sec max 750 mm/sec
(Adjustable) return speed max 800 mm/sec max 800 mm/sec
Remnant length (standard version) 400 mm 400 mm
Remnant length (oversize version (*) 700 mm 700 mm
Bar change-over time (with 3000 mm bar) 25 sec 23 sec
Input voltage 380 Volt 380 Volt
Mains frequency 50 Hz 50 Hz
Control voltage 24 Volt D.C. 24 Volt D.C.
Installed power 1,5 kW 2kW
Oil quantity 40 l 40 l
Air pressure 6 bar 6 bar
Pneumatic energy average consumption (**) 20 NL/min 20 NL/min
Dry weight
mod 32 - 900 kg
mod 37 - 1000 kg
mod 44 - 1100 kg
mod 32 - 900 kg
mod 37 - 1000 kg
mod 44 - 1100 kg
Table 5. Working axis height
Model Upper screws
position X(mm)
MINI BOSS
BOSS
1900÷939
2940÷969
3970÷1009
41010÷1039
51040÷1079
61080÷1109
71110÷1149
81150÷1179
91180÷1200
(*) excluded version 32 LL
(**) Approximate value depending on the number of activation cycles.
34.028 Ec. 0

15
2
TECHNICAL INFORMATION
302.034
(*) valid also for prepared bars or normal bars machined with front remnant ejection
Table 6. Diameters of guides, bar-pusher, bars and pipes
Model Guide
diameter (mm)
Bar-pusher
diameter (mm)
Bar diameter (mm) Pipe
diameter (mm) (*)
MIN MAX
MINI BOSS
13 10 3 8 10
12 310 12
17 15 513 15
16 514 16
21
16 514 16
18 516 18
19 517 19
20 518 20
26 23 521 23
25 523 25
28 25 523 25
27 525 27
BOSS
13 10 5 8 10
12 510 12
17 15 513 15
16 514 16
21
16 514 16
18 516 18
19 517 19
20 518 20
26 23 521 23
25 523 25
28 25 523 25
27 525 27
33
30 527 30
31 528 31
32 529 32
36 32 529 32
35 532 35
43 40 10 37 40
42 10 39 42
46 42 10 39 42
45 10 42 /

16
2
TECHNICAL INFORMATION
302.034
Table 7. MINI BOSS guides lubricating oils
ISO and UNI
symbols Make Name
CB 100
Agip Acer 100
Api Api Cis 100
BP Energol CS 100
Castrol Magna 100
Chevron Circulating Oil 100
Elf Movixa 100
Esso Nuto 100
Fina Solna 100
IP IP Hermea 100
Klüber Crucolan 100
Mobil Vactra Oil Heavy
Olio Fiat Daphne LPN 100
Roloil Arm V 100
Shell Vitrea 100
Tellus C 100
Ta m o i l Industrial Oil 100
Texaco Omnis 100
To t a l Cortis 100
Azolla ZS 100
Q8 Verdi 100
Table 8. BOSS guides lubricating oils
ISO and UNI
symbols Make Name
CB 150
Agip Acer 150
Api Api Cis 150
Aral Aral Degol Tu 150
BP Energol CS 150
Castrol Magna 150
Chevron Circulating Oil 150
Elf Movixa 150
Esso Nuto 150
Fina Solna 150
IP IP Hermea 150
Klüber Crucolan 150
Mobil Vactra Oil Extra
Heavy
Olio Fiat Daphne
Hidrobak 150 HL
Roloil Arm V 150
Shell Vitrea 150
Tellus C 150
Ta m o i l Hydraylic Oil 150
Texaco Rando Oil HD 150
To t a l Cortis 150
Table 9. Air lubricator oils
Model Make Name
MINI BOSS
BOSS
BP Energol HLP10
Esso Spinesso 10
Mobil DTE 21
Shell Te l l u s C 1 0

17
2
TECHNICAL INFORMATION
302.034
2.6.1 Noise levels
Bar feeder does not cause acoustic noise.
Noise occurs when lathe, connected to the bar feeder, is working and the bar
is rotating into bar feeder guides.
In such a case, noise level emitted depends on the following conditions:
•perfect alignment and levelling of the lathe-bar feeder unit;
•proper fastening to the floor both of lathe and bar feeder;
•suitable bar gripping device fitted on lathe;
•dimensions of guide channel and bar-pusher suited to the bar stock;
•front guide bush of suitable diameter (if supplied);
•bar with a straightness within prescribed limits (max. arrows equal to 0.5 ‰ mm of the bar length);
•spindle liner having the same diameter as the bar feeder guide channel diameter;
•spindle rotation speed suitable for the material to be machined;
•as to the bar feeder, use of oil having features suitable for the diameter of the bar to be machined;
•all bar feeder panels must be closed.
Should the above mentioned conditions be met, the noise level emitted during
bar rotation into the guide channel, measured in compliance with the interna-
tional standards, will be within the following limits:
•brass and steel round bars within 80 dbA
•hexagonal steel bars within 83 dbA
•brass hexagonal bars within 85 dbA

18
2
TECHNICAL INFORMATION
302.034
2.7. FITTINGS - Foreword
To improve the feeder performance and increase its versatility, a
few optional devices are available which are listed and then de-
scribed below.
2.7.1 Bush-holder device - Description
2.7.2 Axial displacement device - Description
2.7.1 Bush-holder device - Description
It is attached to the front part of the bar feeder. Its func-
tion its to reduce bar vibrations to a minimum, by keep-
ing the bar centered during rotation through two half
bushes A, which are coupled to form a round channel
with a diameter just slightly larger than that of the bar
being machined.
In many cases, this device can be used (by only
changing the diameter of the half bushes) to greatly
extend the range of diameters which can be machined
without having to replace the guide channel.
Operation
•When the bar is dropped into the guide channel, the
two half bushes are open.
•Closure is controlled by a pneumatic cylinder after
the feeder has completed the bar feeding cycle. Clo-
sure also controls lubricating oil flow for lubrication
and machined bar support purposes.
•When the bar-pusher approaches the device, the
half bushes open up to allow its passage; oil flow is
then discontinued.
34.016 Ec. 0
MINI BOSS
BOSS
A
A