JB-DW-300B Micro Computer Full Automatic Low Temperature Impact Tester
Function summary
The microcomputer controlled low-temperature automatic impact testing machine is used to measure the resistance of metal materials to impact under dynamic loads, in order to determine the properties of materials under dynamic loads. The maximum impact energy is 300J with a 150J pendulum. The sample section is (10x10) mm. This machine has a large impact energy and is suitable for black metals with high impact cutting properties, such as steel and its alloys.
This machine is an integrated machine for low-temperature testing and impact testing, equipped with a dedicated automatic sample delivery. The method of end face positioning is used to centring the sample, ensuring that the impact time from the completion of the low-temperature test to the exit of the furnace does not exceed 5 seconds, thereby improving the accuracy and efficiency of the test. The cooling, constant temperature, temperature adjustment, sample delivery and so on are all electrically controlled and automatically completed. After punching the sample, the remaining energy is used to prepare for the next impact test. Therefore, in laboratories that continuously conduct low-temperature impact tests, departments such as metallurgy and machinery manufacturing can better demonstrate its superiority.
Advantage
The impact body of this machine is made of cast steel material, which makes it rigid and stable throughout the entire test process. The machine has strong impact resistance, is not easily deformed, accurate test results, and has a long service life. By using a torque clutch and a power motor, it is more stable and vibration free during swinging and releasing. The low-temperature section adopts a cascade compressor refrigeration technology, utilizing the principle of thermal equilibrium and circulating stirring to achieve automatic uniform cooling, constant temperature and temperature regulation of the sample.
Standard
This machine is developed and produced in accordance with the national standard GBT 3808-2018 "Inspection of Pendulum Impact Testing Machines". It conducts impact tests on metal materials in accordance with the national standard GBTT 229-2020 "Charpy Pendulum Test Method for Metal Materials" and complies with JJG 145-2007 "Verification Regulations for Pendulum Impact Testing Machines". If the structural form is changed and related parts are replaced, it can simultaneously meet the requirements of international standards such as American and European standards ASTME23, EN 10045, ISO148, ISO 83, etc.
Technical parameter
Impact energy: 150J 300J
Scale range and division value: 0-300J 0-150J
Pendulum torque: 0-300J M=160.7695N. m
0-150J M=80.3848N. m
Pre swing angle of the pendulum: 150 °
Distance from the center of rotation of the pendulum axis to the impact point (center of the specimen): 750mm
Impact velocity: 5.2m/s
Sample support span: 40mm
Support jaw fillet: R (1.0~1.5) mm
Blade curvature radius: R (2.0~2.5) mm
Tilt angle of the supporting surface of the sample support: 11 °
Impact blade angle: 30 °
Impact blade thickness: 16mm
Angle measurement range: 0-360 °
Angle resolution: ≤ 0.06 °
Sample size: 10x10x55 mm
Sample box capacity: 20 pieces
Refrigeration method: compressor refrigeration
Low temperature range: room temperature~-60 ºC ºC
Temperature control accuracy: fluctuation ± 0.5 ºC, gradient 2 ºC
Digital timer: 1 minute~999 minutes, resolution 1 minute
Cooling medium: air-cooled
Feeding speed: ≤ 4S
Host external dimensions (length x width x height): 215x80x1400mm
Host weight: 570Kg
Power supply: three-phase four wire system 380V50Hz 2.6KW
Working conditions:
1) Within the range of room temperature of 23 ºC±2 ºC;
2) Relative humidity not exceeding 85%;
3) In an environment without corrosive media, vibration, or strong electromagnetic interference;
4) Installed on a concrete foundation with a thickness of not less than 200mm or fixed on a foundation with a weight greater than 1400kg;
5) Adjust the levelness of the installation reference surface on the machine base to within 2/1000.
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