Computerized Universal Testing Machines

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Computerized Universal Testing Machines

 
Computerized Universal Testing Machines

Features :
• Loading accuracy as high as ± 1%
• Straining at variable sppeds to suit awide range of material
• Printer supplied as option to study the behavior of the material.
• Motor driven threaded Columns for quick effortless adjustment of middle cross-head to facilitable rapid fixing
  of test specimen
• Simplicity in reading because of digital readouts
• Wide ragne of stadard and special accessories, Including load stabilizer
• Easy change from plain to threaded adn screwed specimens
• Large effective clearance between Columns enables testing of standard specimens as well as structures
• Simple controls for ease of operat on.
• Robust straining frame of an extremely rigid construction
• Safe operation ensured by means of safety devices
• Fully enclosed and protected pressure transducer
• Optional to transfer data to computer for analysis/storage evaluation on etc.
• Confirms to IS 1828
     
Application :
MCS Electronic Universal Testing Machine is designed tor testing metals and other material under tension, compression, bending, transverse and shear loads, Hardness test on metals can also conducted

Principle of Operation :

Operation of the machine is by hydraulic transmission of load from the test specimen through pressure transducer to a separately housed load indicator. The system is idea since it replaces transmission of load through levers and knife edges which are prone to wear and damage due to shock on rupture of test pieces

Load is applied by hydrostatics y lubricated ram. Main cylinder pressure is transmitted to the pressure transducer housed in the control panel. The transducer gives the signal to the electronic display unit, corresponding to the load exerted by the main ram. Simultaneously the digits electronic encoder fitted on the straining unit gives the mechanical displacement to the electronic display unit. Both the signa s are processed by the mcroprocessor and load and displacement is dsp ayed on the digits readouts simultaneously.

Machine consists of
Straining Unit : This consists of a geared motor with chain & sprocket drive and a table coupled with the ram of the hydraulic cylinder, mounted on to a robust base. The cylinder and the ram are individually apped to eliminate hid on The upper cross-head is rigidly fixed to the table by two strengthened columns.

The lower cross-head is connected to two columns which are driven by a motor Axia loading of the ram s ensured by relieving the cylinder ram of any provision side loading by the provision of ball seating

An displacement scale with a minimum graduation of 1 mm, is provided to measure the deformation of the specimen. Tension test is conducted by grpping the test specimen between the upper and lower cross-heads.

Compression transverse, bending shear & hardness tests are conducted between the lower cross-head and the table. The lower cross-head can be raised or lowered rapidly by operating the screwed columns, thus facil rating ease of fixIng or the test specimen.

Control Panel :
The control pane consists of power pack complete with dr ve motor and an oil tank control valves and electronic display unit.

Power Pack :
The Power Pack generates the maximum pressure of 200 kgf/cM. The hydraulic pump provides continuously non-pulsaating oil flow Hence the load application is very smooth.

Hydraulic Controls :
Hand operated wheels are used to control the flow to and from the hydraulic cylinder The regulation of the oil flow is infinitely variable Incorporated n the hydraulic system s a regulating valve which maintains a practically constant rate of piston movement Control by this valve allwows extensometer readings to be taken.

Test

     

Electronic Measuring System for Universal Testing Machine

     
Electronic Control Panel
Electronic Control Panel
Measuring System with Electronic Control Panel MCS-MP
Electronic control panel uses latest microprocessor which incorporates state of the art technology with fo lowing features. The panel s having unique feature of two modes of operations i. e. Panel control mode & PC control mode. With pane contro mode, the mach ne can be operated from panel ( without PC) and g ves output results / graph on dot matrix printer connected to the panel. With PC control mode, load, displacement and extension data transferred to PC through RS- 232 serial port thus giving rea time disc ay and graph of se ected test on PC.
Features :
• Full fledged sealed membrane keyboard with numeric keypad.
• Data entry for specimen d mensions.
• Push button tare facility for load & reset for displacement/extension.
• Serial port for commun cation wth PC.
• Built in centronics interface for dot matrix printer.
• Modulus data output (optional ).
• Scrolling of test result data up to breakage.
• Results include load Vs Displacement Curve, Max Load/ Displacement. UTS, % Elong % reduction n Area,
  Yield oad, Proof Stress.
• Over oad safety through opto isolated output
   
Serial Communications Software.
MCS-MP series control panel can be connected to any PC using RS-232 commun cat on port. MCS offers window based software on PC to enable the user to effectively evaluate different parameters. The Features include

• Real time graph of selected test on PC.
• User friendly software with colour graphics.
• Wide Range of Data entry for easy test setup
• Unit interchangeability of load in kg., T, N, kN.
• Extensive graphics, Curve fitting / Zooming / Tracing.
• Effective file handing for data storage, RD BMS based.
• Operational instructions on HELP Screen for a I programme modules.
• Automatic calculation of Proof stress and Young s Modulus with graphical representation
• Automate reseal ling of graph.
• Batch testing, mult graph facility and statistica anaysis with MIS reports (optional).
• Load, displacement, extension, strain rate values are displayed at all times on PC screen
• Load Displacement, Load V Extenssion, Stress Strain graphs available for single test run..
• Results include graph, Max load Max displacement, U.T.S.,% E ongation,% Reduction In Area, proof load,
  proof stress, Yield stress, Youngs Modulus, breaking load, etc.

Measuring System with PC Add on cards MCS-PC.

In MCS PC model, the measuring system is based on two PCB's inserted in PC motherboard slots. All the system features are same as MCS-MP with serial software.

Electronic Extensometer

MCS offers Strain Gauge type electronic extensometer for the evaluation of 0.2 Proof Stress 8, Young's modulus values.

Extensometer Specifications

• Model MCE-2
• Type Strain Gauge
• Extension 2 mm
• Gauge Lenth 25 / 50 mm
• Maximum Dia. : 25 mm

Technical Specifications :
Model
Units
UTE
FLG-10
UTE
FLG-20
UTE
FLG-40
UTE
FLG-60
UTE
FLG-100
UTE
FLG-200
UTE
FLG-300
Maximum Capacity
kN
100
200
400
600
1000
2000
3000
Measuring Range
kN
0-100
0-200
0-400
0-600
0-1000
0-2000
0-3000
Load Resolution
N
10
20
40
60
100
200
300
Load Range with accuracy measurment ±1 %
kN
2 to 100
4 to 200
8 to 400
12 to 600
20 to 1000
40 to 2000
60 to 3000
Resolution of piston movement
mm
0.1
0.1
0.1
0.1
0.1
0.1
0.1
Clearance for tensile at fully descended working piston
mm
50-700
50-700
50-700
50-850
50-850
50-900
50-900
Clearance for Compression test at fully descended working piston
mm
0-700
0-700
0-700
0-800
0-850
0-900
0-900
Clearance between columns
mm/min
500
500
500
600
750
850
850
Ram Stroke
mm
150
200
200
250
250
300
300
Straining/piston speeds (at no Load)
mm/min
0-300
0-150
0-150
0-100
0-80
0-45
0-45
CONNECTED LOAD
Power
kW
1.0
1.0
1.7
1.9
2.6
4.9
6.4
V
400-440
400-440
400-440
400-440
400-440
400-440
400-440
Ø
3
3
3
3
3
3
3
Dimensions
L X W X H (approx.)
mm
2032
750
1960
2032
750
1960
2060
750
2180
2265
750
2534
2415
815
2900
3000
1200
3000
3500
1900
4550
Weight (approx.)
Kg
1500
1500
2500
3500
5500
9500
15000
STANDARD ACCESSORIES - FOR TENSION TEST
Clamping jaws for round Specimens of diameters
mm
10-20
20-30
10-20
20-30
10-25
25-40
10-25
25-40
40-55
10-25
25-45
45-70
20-40
40-60
60-80
25-50
50-70
70-90
Clamping jaws for flat Specimens of thickness
mm
00-10
10-20
00-10
10-20
00-15
15-30
00-15
15-30

00-20
22-44
00-20
20-45
45-70
00-25
25-50
50-75
Width
mm
50
50
65
70
70
90
100
FOR COMPRESSION TEST
Pair of comperession plates of diameter
mm
120
120
120
120
160
220
220
FOR TRANSVERSE TEST
Table width adjustable rollers. width of rollers
mm
160
160
160
160
160
200
200
Diameter of rollers
mm
30
30
30
50
50
70
70
Maximum clearance between support
mm
500
500
500
600
800
900
1000
Radius of punch tops
mm
6,12
6,12
12,6
16.22
16,22
30,40
50,75

Special Accessories & Options:
• Load Stabilizer
• Printer
• X - Y Plotter
• Brinell Test attachment
• Shear Test attachment
• Serial communication port with software package
• Mechanical Extensometer
• Electronic Extensometer for proof stress
• Electronic Extensometer uo to breakage
• Load full scale of 20,000 or 50,000 counts
• Piston movement resolution of 0.01mm
• Load Rate and Strain Rate indication
• Wide range of accessories offered on the request at additional cost
• Due to constant R&D specifications and features are subject to change without notice
• The dimensions given above are approximate

 

Universal Testing Machines

 
Computerized Universal Testing Machines

In today's days of automation, existing mechanical dial type Universal Testing Machines are getting obsolete. More ever it takes plenty of time for testing. Plotting of graph required test in different units is still difficult. Evaluation of important Parameters like proof stress. Young's modulus is very tedious and time consuming.

Up gradation package :
• Microprocessor based control Unit
• For hydraulic Machines preseure cell is used
• For Screw drivern machines load cell used
• Cross head displacement measured by rotary encoder
• For Screw driven machine DC/AC servo drives are used

Measuring system with eletronic Control panel :
MCS-MP is a state of the art micro processor based unit specially designed for Universal Testing Machines with digital display of Load and Displacement / Extension.


     
Control Panel Features :
• Sealed rnembrane keyboard with numeric keypad
• Data entry for specimen dimensions & job serial number
• Digital Tare tor Load and Reset for Disp./ Extension
• Load vs Disp. graph directly obtained on dot matrix printer
• Autoscaling of graph plotting at the end of test
• Selection of Stop/Return of cross head and direction
• Results include Peak Load. Max. Disp. UTS, % Elong

Advantages of Electronic Systems :
• Machine becomes compulorized with digital indication of load
• Reasults available in required SI units along with graph
• Highly accurate, no manual intervention, error free working
• Direct values of UTS. yield stress & 0.2% proof stress available
Software Features :
• System is independent of the type of computer used
• User friendly windows software for complete test control
• Real Time Graph with online display of load, Disp / Exin.
• Wide range of input / output data selection
• Unit interchangeable for input and result as per standard
• Exterksive graphics, curve lilting, Zooming
• Results include Peak Load, UTS. Max Disp. % Elong
• Area under the curve, % red, in Area, Yield & Proof stress
• Multi grapha Load vs Disp, Stress vs Strain, load vs %Elong

Evaluating Proof Stress : Electronic Extensorneter :

MCE 2 is a strain gauge type, extensometer to measure material extension with a resolution of 1 micron. It is designed to be clamped directly on specimen. This is used to measure strain up to elastic limit to determine important parameters like 1% to 1% proof stress and Young's modulus, MCE 2 has two fixed gauge lengths of 25mm and 50 mm. Change of gauge length is by means of replacing button knife-edge extender, MCE 2 is fabricated from high strength fight weight aluminium with a durable anodized finish. The knife-edges are made from oil hardened tool steel to withstand heavy usage. Supports maximum dia of 40mm & maximum extension 2mm

Panel Control Mode :
Micro processor panel works independently. It shows load, disp. and extension on control panel. It has membrane keyboard or data entry. All specimen related parameters can be entered In to the control panel. At the end of the test one can entered see all test results on front penal display. Load vs Disp. graph can be directly obtained on dot matrix printer.

Servo Control System for UTM with Stepper :
MCS has developed unique system Io add servo control facility to UTM. The system contains following.
Motorised servo valve with following items :
• Hydraulic loading valve
• Stepper motor, capacity 20 kg-cm
• Power card for stepper motor
Windows based software for controlling servo valve
MCS Make Centrol box with Auto / Manual selection
Potentiometer for operating valve in manual mode

Every UTM has manually operated hydraulic valve. which controls rate of loading. It is very difficult to achieve required rate of loading manually. Due to stringent testing requirements, it is required to conduct tests at specified load rate or strain rate. MCS has developed servo system where above loading valve is converted into a motorized valve by using stepper motor. A special windows based software controls this valve and the operation of the machine.

Servo Controlled operation :

There are two models fo operation. In manual control moe, the machine is operated by means of potentiometer provided on control box. Here, no rate control is offered. The machine is operated by means of potentiometer in similiar ways as we operate hydraulic valve.

In auto control mode, operator enters required load / Disp / Strain rate on computer. When we start the test, the required rate is always compared with achieved rate and error feedback controls machine accurately.

Following rate control modes are available :
• Load rate control : 1 kN to 10 kN per sec
• Displacement rate control : .01 mm to 1 mm per sec.
• Strain rate control : 0.001% to 0.01 % per sec. (strain rate control is possible only with extensometer)

Servo Control with MOOG Valve:
Instead of stepper motor, a MOOG valve can be used for precise load rate control