Creep Testing Machines

Accurate axial loading of the specimen is ensured by a co-planar knife-edged coupling, located at each end of the loading string. The loading string and furnace are aligned to the centre of the two front columns. The three-zone closed cylindrical furnace is attached to the front columns of the load frame by two pairs of guide blocks and has an integral counterweight mechanism which considerably eases the raising and lowering operation. When the furnace is raised there is complete accessibility for specimen replacement and extensometer/thermocouple attachment. The furnace can be supported in any position by a lockable clamp.

• Creep testing at elevated temperatures
• Stress to rupture
• Stress relaxation
• Constant load test in compression

Drive Systems :
The correct load is applied to the specimen when the lever is in the horizontal position. To reposition the lever manually, the loading string can be raised or lowered by rotating the chromium plated capstan hand wheel at the rear of the base unit. Through a 20:1 ratio worm gearbox and drive shaft, the lead screw connected to the lower loading bar can be adjusted up to its full travel of 100 mm. how ever, automatic lever leveling is highly recommended.

An opposing pair of optical switches fixed to the lever detects movement of the lever from the horizontal plane, and then activates an electric motor which drives the lead screw to correct the position of the lever in the event of furnace failure, the automatic lever leveling system will maintain the correct test load on the specimen as the furnace cools down. The drive system includes, over travel trips and an anti-torque bar assembly which prevents any torsional loading of the specimen during lever repositioning.

The CP machine lever calibrates to IS 1828-2005, Class I. This machine is designed for the laboratory requiring a large number of test points within a limited floor area. It is compact yet versatile in its operation and requires no special foundations. Shock absorbers prevent vibrations being transmitted to other loading strings when a specimen failure occurs. In the event of a power or furnace failure, the system fails safe. A small cabinet contains the three-zone temperature controller , elapsed time meters and transducer conditioning modules, if extensometers are supplied.

Closed Loop Servo Control :
MCS offers an electronic creep testing machine with full closed-loop servo-control in three capacities: 10, 20 and 30 kN. Creep, stress relaxation, slow strain rate and constant stress tests (assuming constant volume change in the test specimen) are performed automatically under extremely accurate closed-loop control.
The drive system comprises a AC Sevo motor with toothed belt and gearbox to the recirculating ballscrew actuator. A backlash-free, anti-torque bar and a pneumatically operated mains failure protection device are incorporated as standard. Load cells, electronic extensometers, furnace, temperature controllers, elapsed time meters and loading bars are identical to those available for the CP series, described earlier in this brochure.

Creep Laboratory Management Systesm :
MCS can provide a fully computerized supervision, monitoring and data logging system for both mechanical and electronic creep machines. This CLMS is designed to monitor up to 120 individual machines or test points on a minute by minute basis

A complete laboratory status display keeps
The supervisor constantly up to date with exactly what is happening at each test point. Errors and warnings are audible and visual, and are shown on the computer screen as well as recorded on a printout. Using the in-built databases of available equipment including : test point type, weights, furnaces, thermocouples and HTD extensometer for varied hot tensile specimens , displacement transducers, it will select the optimum configuration for your test.
Logarithmic logging of data keeps files manageable, with the last 24 hours logged in 15 minute intervals. All test results can be viewed in both tabular and graphical formats. CLMS includes full file management facilities enabling password protection, copying, deleting or exporting in spreadsheet format.

Extensometry :
MCS manufactures highly sensitive and accurate electronic extensometer which is mounted axially on the test specimen. They are suitable for attachment to plain and round test specimens and are of twin transducer design.
Temperature Control :
Temperature is controlled directly from a thermocouple on the test specimen. The three-zone controllers incorporate microprocessor based PID instruments which give three-term control and digital display. Proportional band, integral and derivative time constants, cut back and heat power limit are standard features.

• Motorized draw-head assembly automatically compensates for specimen elongation and keeps loading bar with excellent load accuracy of +/- 0.5% guaranteed.
• Both room temperature and elevated temperature systems are available
• Furnace and chambers available with temperature ranges from 200°C to 1200°C in common air environments
• Numerous high temperature pull rods, specimen holders, furnace systems and extensometers available for creep and stress Relaxation applications. Many of which are also adaptable to hot tensile testing applications on universal testing machines.
• Relaxation test be available via MCS Series instead of lever type-high temperature stress rupture testing machine
• DSC-300 control system owns the three closed control function as load control, extension control, and velocity control. High precise control and accurate load with load measurement resolution reach 1/300000; the loading testing curve can be plotted automatically.
• Additionally, manual operation also be offered, users can unload to protect the apparatus by hand, especial the load cell, when suddenly power cut off.
• MCS Powertest software owns powerful function offering specimens registration, apparatus control, test data acquisition and store, test result inquiring, data processing and test report export
• Remote communication control function saves your operators invigilation during testing process; alarm message can be transmitted to your mobile phone to inform you test situation by equipping with special dial number device.

High Temperature Furnace:
MCS new designed three-zone open cylindrical furnace features ceramic fiber insulation structure which is the first application in China. The heating elements are individually take action on ceramic half tube sections, and provide three heat zones for excellent control of temperature gradients and reliably continuous operation up to the specified maximum temperature. During the test the emperature is controlled directly by a thermocouple on the test 0specimen. The three-zone controllers incorporate the microprocessor based instruments which give three-term control and digital display. Proportional band, integral and derivative time constants, cut back and heat power limit are standard features. In addition, a range of test chamber assemblies is available for use inside the high temperature furnaces, thus allowing creep studies under hostile atmospheric conditions.

Three Zone open High Temperature Furnace
Temperature Controller :
MCS temperature Control systems are designed for controlling the heat output of furnaces in testing of creep, stress-rupture, or hot tensile systems and others. The system is compatible with all furnace systems offered as new equipment and can be configured to operate nearly any furnace with any one of several different thermocouple types. MCS can also provide a fully computerized supervision, monitoring and data logging system for both mechanical and electronic creep machines. This creep laboratory management system is designed to monitor up to 101 individual machines or test points on a minute by minute basis. A complete laboratory status display keeps the supervisor constantly up to date with exactly what is happening at each test point. Errors and warnings are audible and visual, and are shown on the computer creen as well as recorded on a printout. Using the in-built databases of available equipment including: test point type, weights, furnaces, thermocouples and round ridged, round grooved and flat test specimens and are of twin transducer design.

Temperature Controller for High Temperature Furnace
Powertest Software :
Building on our long history of providing solutions to an enormous variety of different testing problems, MCS offers a comprehensive range of software products, each design in the hope of making testing simple, precise and efficient. Specific and focused application software products have been developed in close cooperation with our customers around the world. There are several valuable features that are common to all. Perhaps the most important is the ability to further customize the testing parameters that are used to collect and document testing data, as well as control the testing machine. Specifically, our range of application software is for data acquisition, data analysis, and closed loop control of MCS testing machines that have a compatible servo system or four-quadrant drive. All versions of our focused application software are rich with standard features that improve productivity and enable you to build, access, and use a powerful material testing database.

Use of Modern Databases:
• Generation of user customized reports.
• Standard SPC programs for X-bar, R, and frequency distributions / histograms.
• Ability to recall, replot, and rescale curves.
• Recall of data that spans different test modules.
• User-configurable machine parameter and control setting