Before we summarize the factors affecting the accuracy of the test results of the plastic tensile testing machine, let us first take a look at which parts of the plastic tensile testing machine.
The plastic tensile test unit produced by Ligao consists of the main frame, force sensor, screw, tensile machine fixture, computer, control system, force measurement system, transmission system and power system.
The following are some of the main factors affecting the accuracy of the test results of plastic tensile testing machines:
Factor 1: The rigidity of the mainframe frame is an external factor that determines the measuring range of the plastic tensile testing machine. If the design of the mainframe frame is reasonable and the rigidity is large, the bearing capacity of the mainframe is large, and vice versa. Generally, the three-column structure is relatively stable and reliable, and the bearing capacity is also large; the double-column structure not only has poor carrying capacity, but also has poor stability, and the middle beam tends to have a left-right swing phenomenon when moving, which greatly affects the indication accuracy of the testing machine.
Factor 2: The control system is the heart of the testing machine. Its stability, anti-interference ability, zero drift, and temperature drift not only affect the accuracy of the product, but also affect the minimum resolution of the test force.
Factor 3: The core component of the force measurement system is the sensor. Sensor sensitivity, nonlinearity, hysteresis, repeatability, creep, and overload capability are important indicators.
Factor 4: The transmission system usually refers to the deceleration system and the motion system. The synchronous belt pulley deceleration has the characteristics of high transmission precision, high efficiency, low noise, accurate positioning, etc. Compared with the deceleration of the reducer, its advantages are obvious; the motion system is mainly the ball. The lead screw replaces the trapezoidal lead screw, and its transmission efficiency is improved by three times, the positional precision is high, the bearing capacity is large, the noise is low, and the service life is long.
Factor 5: The power system is a servo motor, which is much higher than the three-phase asynchronous motor or variable frequency motor used in the plastic tensile testing machine on the market. The servo motor adopts digital signal control. The control mode is full digital pulse, wide speed range, fast positioning and fast response, fast loading speed, constant torque output, strong overload capability, overload, overcurrent, overvoltage, etc. Kind of protection.
Summary: The above five factors are the main factors affecting the accuracy of the test results of the plastic tensile testing machine. As long as we master these five factors, we will definitely purchase a suitable testing equipment for our own materials.
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