Universal Testing Machine for Strand Steel Wire Tensile Test

Load Frame Configuration:
6 columns, servo-controlled hydraulic
Capacity:
600kN, 1000kN
Test Space:
Dual zone (tension on top, compression on bottom)
Typical specimens:
Fasteners, rebar, chain, welds, castings, stranded steel wire

Load frame
Ø Specially designed longer jaw face for tensile test of stranded steel wire
Ø Lead screw driven crosshead to adjust the test space
Ø High-Stiffness 6-column load frame design incorporates 3-position crosshead, adjustable

Broken specimen
Extensometer
Specimen positioning, precision guide columns, thick crosshead and base beam minimizes load frame stored energy while producing reliable, stable, accurate load, strain and modulus values.
Ø Ergonomically designed load frames ensure safety, reduce operator fatigue, and provide the highest level of flexibility.
Ø Standard Dual Zone Test Space for reducing setup time
Ø "Quick Return" hydraulic valve for higher throughput
Ø Automatic limit checking for crosshead position, overload, over temperature, over voltage, etc.
Ø The system can return automatically, the oil cylinder can return the original position via manual or automatically after finishing testing
Ø Positive specimen holding is ensured by the wedge action of hydraulic operated grips
Ø Imported encoder mounted on the seat is for position measurement of crosshead with high accuracy
Ø Imported servo valve provides high stability and reliability

Load cell
1. Use strain gauge load cell technology to measure the force being applied to specimen. The load cell is located in the lower grip and is used to directly measure tensile force.
2. High precise load cell measures and captures sensitively tension and compression force, high accuracy load measurement resolution reaches 1/350000 with no steps.
3. Famous brand load cell ensures high precision and repeatability.

Controlling system DTC-350
1. Closed loop control of stress, strain and displacement.
Control loops can switch automatically and smoothly. Control algorithm adopts advanced neural element self-adapting PID. Neural element has ability of close to any non-linear function, simple structure and learning algorithm. It can adapt changing of control object by changing its own synapse weighting and distinguish parameter on line, rebuild object model on line.
2. Control system based on DSP
DSP, the professional CPU and RISC, is used as control chip of the products. The chip has many functions, such as 40MIPS, 32-digit fixed point, vector control, A/D exchange, position capturing, etc. It is a CPU widely used in industry controlling and suitable to be IC of our products.
3. USB 1.1 communication
Data exchange between hardware and software via USB 1.1inrerface and velocity of 12MB/s. USB is main direction of development of communication, which has merits of high communication velocity, variety of communication mode( such as controlling, breaking, batch, real time, etc. ), and will be the main mode of communication.
4. Data acquisition system and position capturing system. Data acquisition system consists of 8 channels of 24 bit A/D exchange; Effective resolution is 1/350000 with non-step in full range. Exchange velocity and gain are programmable on line. The products contain 3 channels of encoder position capturing system permitting photo-electric orthogonal code impulse. Frequency can reach 5 MHz, which has functions of correcting, direction identifying and number-counting.