IS 8711: Gap Frame Open Front Mechanical Presses - Capacity Ratings and Dimensions

13 Pages·2002·1.2 MB·English

by  Bureau of Indian Standards

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IS 8711 (2002): Gap Frame Open Front Mechanical Presses -
Capacity Ratings and Dimensions [PGD 4: Metal Forming
Machines]
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Satyanarayan Gangaram Pitroda
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IS 8711:2002
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Indian Standard
GAP FRAME OPEN FRONT MECHANICAL PRESSES —
CAPACITY RATINGS AND DIMENSIONS
(First Revision)
ICS 25.040.30

(3 BIS 2002
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC
NEW DELHI 110002

.%plemher 2002 Price Group 4
.,
Metal Forming Machines Sectional Committee, BP 04
FOREWORD
This Indian Standard (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized
by the Metal Forming Machines Sectional Committee had been approved by the Basic and Production
Engineering Division Council.
This standard was first published in 1978 with a view to assist the designers in designing new gap frame open-
back presses. Variety reduction was one ofthe objects aimed atby the manufacturers engaged inmass production
and also to ensure improved designs within the sizes given in the standard to make it economical in long run.
This standard is applicable for left to right shaft mechanical presses.
1n view of technological innovation and varied requirements of user industries, national and international,
many changes have been introduced in the presses. Also these changes have been included in this standard. I,n
this revision, the following major changes have been incorporated:
a) Alternate types of bed, one with round opening and the other arectangular opening have been included.
T-slots have been provided in the bed with the round opening so that itcan be used without a bedplate
if required.
b) Two types of bedplate are specified as Type 1and Type 2. Details are also given for bedplug for beds
with round holes and for the bedplate ring for bedplates of Type 2.
c) Table 1has been thoroughly modified. A choice of two values is given for some dimensions in this
table. These are designated as series 1 and series 2. To minimize the variety of dimensions as far as
possible it is intended that all the values for a given press should be selected from one of the series.
However, in order to meet special requirements it ispermitted to select the values for shut height only
from either series 1or series 2.
d) Title of the standard also has been changed.
While revising this standard considerable assistance has been derived from ISO 6898: 1984 ‘Open-fronl-
mechanical presses — Capacity ratings and dimensions’ issued by the International Organization for

Standardization (1S0).

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
1S2: 1960 ‘Rules for rounding off the numerical values (revise~’. The number of significant places retained in
the rounded off value should be the same as that of the specified value in this standard.
IS 8711:2002
Indian Standard
GAP FRAME OPEN FRONT MECHANICAL PRESSES —
CAPACITY RATINGS AND DIMENSIONS
(First Revision)
1 SCOPE IS No. Title
1821:1987 Dimensions for clearance holes for
This standard specifies capacity ratings and dimensions
bolts and screws (third revision)
for gap fi-ame open front mechanical presses with or
2013:1995 T-Slots — Dimensions and spacing
without apassage through the frame and with orwithout
(third revision)
a slope (inclinable or non-inclinable).
2102 General tolerances: Part 1Tolerances
(Part 1): 1993 for linear and angular dimensions
2 REFERENCES
without individual tolerances
The following standards contain provisions, which indication (third revision)
through reference in this text constitute provisions of 8064:2002 Method ofdesignation ofmechanical
this standard. At the time of publication, the editions and hydraulic presses (second
indicated were valid All standards are subject to revision)
revision and parties to agreements based on this
3 DIMENSIONS
standard are encouraged to investigate the possibility
of applying the most recent editions of the standards The dimensions of gap frame open back presses shal I
indicated below: be as given in Table 1(read with Fig. 1to Fig. 7).
[S No. Title 4 DESIGNATION
919 1S0 Systems of limit and fits: Part 1
The gap frame open front presses shall be designated
(Part 1): 1993 Bases of tolerances, deviations and
as given in IS 8064.
fits (second revision)
IS 8711:2002
_—-
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$
BED ‘\
$
tl
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1- -1 L’
sECTION THROUGH
CAPACITY > 400 kN
CAPACIT’f < 250 kN ROUND OPENING
x-x x-x Y-Y
(a)ROUNDOPENINGBEDS

IJ
a *R25 I .
I . - tl
tl L I [;
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r- -,
bl
+
x-x
(b) RECTANGULAROPENING BED
FIG. 1LAYOUTOFPRESSANDALTERNATIVEBEDS
IS 8711:2002
c,
i-
bz
4
z-z
STEM HOLE
FIG,2 SLIDE
B

--M--
FOR BEDS WITH ROUND HOLES
FIG.3 BEDPLATESTYPE 1
i
b --u=
FOR BEDS WITH RECTANGULAR HOLES
FIG.4 BEDPLATESTYPE2

3
IS 8711:2002
CAPACITY< 630 kN - CAPACITY< 250 kN X-X
T-SLOT
A A
I
I
CAPACITY > 800 kN CAPACITY > 400 kN
a) T-SLOTS IN BEOPLATES b) T-SLOTS IN BEDPLATES
TYPE 1 TYPE 2
FIG.5 T-SLOTSFORBEDPLATES
A-+
-+
0
kl 0
+-

@ A CAPACITY< 250
w--l
CAPACITY> 400 kN ~
A-A
A-A
0°
0°
I-JQ
x
x FIG.7 BEDPLUGFORBEDSWITHROUNDHOLES
FIG.6 BEDPLATERINGFORBEDPLATESTYPE2

4
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IS 8711:2002
Table 1The Dimensions of Gap Frame Open Back Presses
(Clause 3)
All dimensions in millimetres.
Nominal Capacity Note 100 160 250 400 630 (800) 1000 (1250) 1600 (2000) 2500
Referring
Throat depth
series 1 165 180 210 235 260 285 310 340 370 405 440
anti,, series 2 — — — 290 325 355 385 425 465 505 545
Shut height
series 1 1 160 180 200 225 250 275 300 325 355 390 425
e! series2 200 225 250 280 315 345 375 410 450 490 530
Bedtoslide distance
series 1 2 225 250 275 305 335 365 395 425 460 500 550
ez series2 265 295 325 360 400 435 470 510 555 600 655
Side adjustment
series 1 40 45 50 56 63 71 80 90 100 112 125
series 2 — 80 85 90 100 112 125 140 160
g Stroke length
u
Max 63 71 80 90 100 112 125 140 160 180 200
z
6 series 1 12 16 20 25
3 Min 125 140 160 180 200 224 250 280
Max
series 2 — 16 20 25
&tin
Direct drive
series 1 2 2 2 2.5 2.5 3 3 —
3
series2 — 3 3 4 4 —
Geared drive
series i — 4 4 4 4 6 6 6 6
3 6 6 6 6 9 9 9 9
series 2
Nominal air pressure 4 0.5(5)
Surface

b, 450 500 560 630 710 780 850 925 1000 1050 1IN

series 1
r, 315 355 400 450 500 550 600 655 710 780 850
b, — 800 900 980 1060 1155 1250 1375 I500”
series 2
/, — 560 630 690 750 825 900 980 Io(i)
Round opening 180 200 225 250 280 305 335 365 400 435 475
D, tot,H]1
~ 5 160 180 200 225 250 275 300 325 355 390 425
m D,
Shoulder depth 6 30 45 56
m, !
f
Rectangular opening
>.
G 225 250 280 315 355 390 425 460 500 550 600
H 160 180 200 225 250 275 300 325 355 390 425
T-slots
width A 7 18 22 23
pitch P, 8 — 200 250 320 400
Maximum angle of
ioclinatio,, ~“ 30 25
I

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