Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. इंटरनेट मानक “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “प0रा1 को छोड न’ 5 तरफ” Jawaharlal Nehru “Step Out From the Old to the New” “जान1 का अ+धकार, जी1 का अ+धकार” Mazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 14877-2 (2002): Hydraulic Presses - Straight Sided Columns/C-Frame Type, Part 2: Test Chart for Technical (Performance) Evaluation of Presses and Press Brakes [PGD 4: Metal Forming Machines]
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Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 14877-2 (2002): Hydraulic Presses - Straight SidedColumns/C-Frame Type, Part 2: Test Chart for Technical(Performance) Evaluation of Presses and Press Brakes [PGD4: Metal Forming Machines]
IS 14877 (Part 2): 2002
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Indian Standard
HYDRAULIC PRESSES — STRAIGHT SIDEDCOLUMN/C-FRAME TYPE
PART 2 TEST CHART FOR TECHNICAL (PERFORMANCE)EVALUATION OF PRESSES AND PRESS BRAKES
ICS 25,120.10
0 BIS 2002
BUREAU OF IN DIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC
NEW DELHI 110002
>
May 2002
I
Price Group 2
Metal-Forming Machines Sectional Committee, BP 04
j=
FOREWORD
This Indian Standard (Part 2) was adopted by the Bureau of Indian Standards, after the draft finalized by theMetal-Forming Machines Sectional Committee had been approved by the Basic and Production EngineeringDivision Council.
This standard has been formulated based on manufacturing practices followed by manufacturers of presses inIndia.
The other part of this standard is:
1S 14877 (Part 1) :2000 Hydraulic presses — Straight sided column/C-frame type: Part 1 Test chartfor geometrical accuracy
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, shall be rounded off in accordance with IS 2:1960 ‘Rulesfor rounding off numerical values (revised)’. The number of significant places retained in the rounded off valueshould be the same as that of the specified value in this standard.
IS 14877 (Part 2): 2002
Indian Standard
HYDRAULIC PRESSES — STRAIGHT SIDEDCOLUMN/C-FRAME TYPE
PART 2 TEST CHART FOR TECHNICAL (PERFORMANCE)EVALUATION OF PRESSES AND PRESS BRAKES
1 SCOPE
1.1 This standard (Part 2) lays down guidelines forperformance testing and technical evaluation forhydraulic presses and hydraulic press brakes.
1.2 It also deals with testing of the running of the press— such as vibrations, noise, etc, and also verificationof the specification of the press.
2 REFERENCE
The following standard contains provisions which,through reference in this text, constitutes provision ofthis standard, At the time of publication, the editionindicated was valid. The standard is subject torevision, and parties to agreements based on thisstandard are encouraged to investigate the possibilityof applying the most recent edition of the standardindicated below:
Is No. Title
14877 Hydraulic presses — Straight sided(Part 1): 2000 column/C-frame type : Part 1 Test
chart for geometrical accuracy
3 DIMENSIONS
The dimensional deviation of various slidemovements of presses shall be as follows:
S1 Test Item AllowableNo. Deviation,
Percent
1. Maximum stroke of slide (mm) +10o
2. Maximum distance from upper”face +10of bolster to lower face of slide (mm) O
3. Maximum distance from upper face of +10the bed to the lower face of the oslide (mm)
4 MEASURING INSTRUMENTS
The measuring instruments shall be of approved typeand shall be conforming to the relevant IndianStandard. The measuring instruments are to beprovided by supplier.
5 TESTS
The performance evaluation consists of inspection ofvarious geometrical parameters on functional aspectsof the presses.
NOTES1 The sequenceofcarryingoutthe testsmaybe changedtosuiteaseof mountingof measuringandtestingequipments.2 It is not obligatory on the part of supplier to give theproductiontrialunlessthebuyerspecifiesitalongwiththeorder.3 Full load trial on test blocks shall be performed by thesupplier.
5.1 Geometrical Tests
Before conducting any performance test, allgeometrical tests shall be completed according toIS 14877 (Part 1) and the machine level is not disturlxd.If required, necessary anchorage maybe provided.
5.2 Performance Test
The performance test comprises of the following:
a) Function test,b) No load running test, andc) Running test with load.
5.2.1 Such tests shall be carried out at supplier’spremises. In case, few tests can not be performed atsuppliers’ premises, the same shall be demonstrated atcustomer’s premises by any suitable means as peragreement between supplier and customer.
5.2.2 Function Test
During the function test, the hydraulic presses and/orhydraulic press brakes with necessary auxiliaries andthe systems shall be run and the smoothness of action.The reliability of function shall be tested in accordancewith the following method as applicable to them:
sl Oper&tion Procedure
No.
1. Press starting Execute the starting andand stopping stopping operations three
times consecutively to test thesmoothness and reliability ofaction.
2. Slide running Execute the runningoperation three times
1
S1 OperationNo.
3. Slide velocityadjustment
4. Slide pressureadjustment
5. Slide strokeadjustment
6. Slide strokeadjustmentindicator
7. Stroke-counter
8. Moving bolster
9. Automatic dieclamp
10. Die cushion/ejector
11. Material feedmechanism, ifapplicable
12. Product feedmechanism, ifapplicable
13. Safety devices
14. Secondary safety
15. Oil pump/grease pumppressure switch
Procedure
minimum consecutively totest the smoothness andreliability of action.
Execute the velocityadjusting operations forminimum and maximumvelocity to test t hesmoothness and reliability ofaction for minimum twotimes.
Execute the pressureadjusting operation forminimum and maximumsettings,
Execute the adjustmentoperation for maximumstroke to test the smoothnessand reliability of action.
Test the accuracyindication.
Test the accuracyindication.
Test the smoothnessreliability of action.
Test the smoothnessreliability of action.
Test the smoothnessreliability of action.
Test the smoothnessreliability of action.
Test the smoothnessreliability of action.
Test the safety of parts
of
of
and
and
and
and
and
suchas gate, guard, sweep guard,pull back guard, two handlever, two hand button andlight beam type safetydevices with regard to theoperator,
Test the safety of parts suchas restarting preventionmechanism, “slide dropprevention, mechanism,emergency stop button,warning lamps, buzzer andready-to-start button withrespect to the operators.
Test the reliability of function
S1 OperationNo.
16. Oil/greasesupply
17. Oil tightness
18. Pneumaticitems such asfilter regulator,pressure gauge,waterseparators, etc
Test the efficiency of lubricationto all concerned parts
Test the oil tightness of thesliding parts and rotatingparts.
Test the reliability offunction.
Test the reliability of function.
Test the reliability of function.
Test the reliability of function.
Test the reliability of function.
Measure the operatingpressure at least three timesand verify that it is within120 percent of the maximumworking pressure.
Test the reliability of machineprotection
Test the insulation oncebefore and after the runningtest.
NOTES1 Runningoperationsreferto interruptedsinglestrokerunning,continuous running, continuous limited time running, inchingand stopping according to its applicability.2 Safety requirements for hydraulic pressesshall be mutuallyagreed between the purchaser and the supplier.
5.2.3 No LQad Running Test
5.2.3.1 No load test shall be conducted by executinginterrupted single stroke running for minimum 500strokes and continuous running of the press forminimum 4 hat maximum stroke with no load to checkits electrical power requirement, temperature changeand running conditions.
Measurement shall be taken only when thetemperature shown by the temperature indicatorremains in equilibrium.
Measurement shall also be for the initial descentduring emergency stopping of the slide.
5.2.3.2 During no load test, measurement for thefollowing shall be made after every one hour intervalfo-nlisting as per 5.2.3.1 above.
a) Working velocity of slide maximum andminimum.
b) Electric power required by main motor duringthe pressing.
2
. A
c) Temperature of running parts mainly1) Motor driving the press at casing and
bearings2) Pump3) Slide face4) Operating liquid media inthe oil tank
d) Air tightness — Test the reliability of function.e) Liquid tightness — Test the reliability of func-
NOTE — The values of temperature, vibration and noise levelsshall be as agreed between the manufacturer and the purchaser,
5.2.4 Running Test with Load
5.2.4.1 Load test shall be conducted by continuouslyrunning at maximum working pressure to check itstemperature change and running conditions. Thetemperature at the measuring site shall be maintainedconstant during the test.
This test shall be conducted with respect to severalcombination of the slide stroke as given in 3.
5.2.4.2 During load test measurement for thefollowing shall be made:
a)
b)
c)
d)
e)
f)
Temperature of casing and bearing of mainmotor driving the press and the operatingliquid in the tank.Air tightness test for the reliability of opera-tion.Liquid tightness test for the reliability ofoperation.Vibration measurement according to relevantIndian StandardsNoise measurement according to relevantIndian StandardsThe duration of pressure application shall bereported as the time taken to ‘tie slide to travelhalf of the maximum stroke at pressingvelocity as given in relevant Indian Standardsand should be recorded as the following table:
IS 14877 (Part 2) :2002
6 TECHNICAL (PERFORMANCE) EVALUA-TION OF HYDRAULIC PRESSES ANDHYDRAULIC PRESS BRAKES
6.1 The performance evaluation consists ofinspection and testing of various geometricalparameters of the press for its reliability andefficiency. The procedure adopted may be changedby the supplier to suit the requirements of the press.The evaluation is only guideline for supplier and heshall ensure that the press meets the specification ofcustomer.
6.2 During evaluation of hydraulic press/hydraulicpress brakes following checks shall be made:
sl DescriptionNo.
1, Bed fabrication
1.1 Flatnesstolerance
1.2 Parallelismtolerance withreference todatum:
2. Bolster2.1 Flatness
tolerance
3. Slide
3.1 Flatnesstolerance,movementtolerance
4. Hydraulicsystems
Check for
Top surface
Slide bottom surface
Cushion surface
Top surfaceBottom surfaceParallelism
Left to right with respect tobolster or bed
Front to back with respect tobolster or bed
Check for the hydraulicsystem pipes as per thecircuitCheck for pump suctionlines and the lines should beas short as possible withminimum bends
sl Time of Temperatare,°C Stroke Duration RemarksNo. Measurement (mm) of
h & min Main Motor Main Motor Operating Ambient PressureCasing Bearing Liquid Temperature Application
away from the pumpingstation (surroundingequipments and machineskeeping idle)
Leakage discharge, etc
Check for temperature ofpump at the end of 8 hours run
Check for pump motorcoupling alignment
Manifold blocks reliabilitycheck at various pressurecheck points for pressuresettings. The settingsshould remain same as beforethe commencement of 8hours run
Pressure setting on manifoldblocks
Specification of oil
Contamination level of oil
Direction of rotation ofpumps
Temperature of oil in powerpack
All hydraulic elements
12. Gauge box Check for pressure settings ofstation various pressure control
elements
Vary the pressure settingsfrom minimum/maximumand record the minimum andmaximum values
Check for provision forsetting minimum andmaximum and intermediate
Pressure drop in the system settings.
Measure noise level at Check for pressure
operators position by running consistent readings
under maximum pressure as Check for pressure
per Indian Standard. consistent readings
Shocks and vibration of the 7 GENEWL CHECKING
gauges
gauges
pipe lines during maximumpressure build up and 7.1 The following general checking shall also be
decompression as pe; IndianStandard
Check all lubrication pointsfor proper lubrication andinjectors to be set as per thelubrication chart.
Run the machinecontinuously for eight hourswithout interruption in aprogramme consisting of allmachine and systemfunctions as per programme
Check for pump noise levelunder full load measuringfrom a distance one meter
conducted:
a)b)
c)
d)
e)
f-)
Piping as per circuit diagram,Accessibility of hydraulic equipment andpiping and mounting or easy adjustment andmaintenance of equipment,Identification of all the elements and equip-ments with labels,Correctness of pump motor alignment aftercomplete assembly,Precision of proper clamping to all the pipes,Provision of dust seals to all the return andsuction lines at the reservoir top, andIdentification and marking of all piping as percircuit drawing.
Bureau of Indian Standards
131S is a statutory institution established under the Bureau of hfianharmonious development of the activities of standardization, markingand attending to connected matters in the country.
Copyright
i
\ .*?,,
+)
Standards Act, 1986 to promote ,*’
and quality certification of goods ,,,,’
BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are alsoreviewed periodically; a standard along with amendments is reaffirmed when such review indicates thatno changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users
of’ Indian Standards shou}d ascertain that they are in possession of the latest amendments or edition byreferring to the latest issue of ‘BIS Catalogue’ and ‘Standards: Monthly Additions’.
This Indian Standard has been developed from Doc : No, BP 04 ( 0015 ).
Amendments Issued Since Publication
Amend No. Date of Issue Text Affected
BUREAU OF INDIAN STANDARDS,, ~,--\’
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