Business Club News, July 23.
The production of spring testing machines in our country has a history of 50 years. This article discusses the development of the domestic spring testing machine based on our factory's products. Most of the early production spring testing machines were ahead of mechanical transmission and analog measurements, and their accuracy was limited. In recent years, with the development of science and technology, we are absorbing advanced technologies at home and abroad and have cooperated with a number of institutions. We have established low, medium, and high-grade ladders, and we have also moved from a single pull-test to a variety of Test characterization testing is progressing. Has developed six different detection methods: static tension and compression, static torsion, high-frequency tension and compression fatigue, low-frequency tension and compression fatigue, torsion fatigue, on-line detection, etc.: mechanical, electronic, electromagnetic, electro-hydraulic, electrical, Electro-hydraulic servo-type, such as six different loading methods; ranging from 1N-500KN different specifications of more than 170 kinds of products.
First, spring testing machine classification spring testing machine can be classified according to the characteristics of the test can be completed as follows:
Vertical clamping: Single-digit explicit double-digit automatic computer-controlled twisting horizontal clamp: double-digit explicit single-digit automatic computer-controlled pull-pressure dial type single explicit double-numbered full Automatic Microcomputer-controlled Static Performance Test Sorting Load Sorting High Sorting Composite Sorting High-frequency Fatigue Pull-Tension Fatigue Low-Frequency Fatigue Mechanical Type Electro-hydraulic Servo-type Torsional Fatigue II. Application and Development Trend of Medium and Small Load Spring Tension-Pressure Tester 2.1 Status Quo of Spring Tension Testing Machines This type of testing equipment was mostly manually loaded, analog or single-digit years ago. In the past ten years, dual-digital testing equipment has become a mainstream device because: 1), Due to the test force and displacement, the double-digital explicit tester adopts high-precision load sensors, displacement sensors, high-precision amplifiers and other vital components to measure, and has high resolution, which overcomes the human eye reading error and has high measurement accuracy. 2), to use computer technology to make the test force, displacement two parameters related to the measurement, you can set the test parameters in advance to improve the degree of automation and data accuracy; you can also save the test parameters to prepare for the next test, without repetitive input; Can do some data calculations, test data printing. For example, in the test process, TLS-S10001 can set compression (pulling) compression (pull) to high (length) or compression (stretch) deformation, and automatically collect the corresponding test force and store it in the MCU. After calculating the section stiffness, free height, initial tension, and judging whether the spring is qualified, the test data will be automatically printed out, and the stored test data can also be queried.
2.2 Development Trend of Spring Tester The primary requirement of small-load springs, especially large-precision precision springs, is that the test accuracy of the equipment is high, because small changes in displacement can cause large changes in the test force, and guarantee the testing force test. Accuracy is a very easy thing to do, but to ensure the accuracy of another parameter displacement of the spring testing machine is the key to ensure the accuracy of the spring test, and it is also a criterion for judging the accuracy of the spring testing machine. Therefore, more and more users use the accuracy of the displacement test as a measure of the level of the test machine. In the national standards for spring testing machines, the requirements for displacement accuracy are very low, and they cannot meet the requirements for large rigid precision springs. Therefore, for test machine manufacturers, the accuracy of displacement testing must be improved to meet the requirements of users. There are many factors that affect the accuracy of the displacement test, such as the detection method, the overall machine structure, the stiffness of the entire machine, the parallelism of the pressure plate, the measuring elements, the materials, the displacement of the load sensor, etc. As long as these factors are overcome, the accuracy of the displacement is guaranteed. Not a problem. Our company's spring testing machine testing is strictly in accordance with the Japanese standard on the displacement of the test, to ensure that the spring is placed in the pressure plate in different parts of the test force is basically the same, to ensure that in the full range of the test force, any load will not cause load The displacement of the sensor sinks.
In addition, the impact of the loading method of the spring tester on the test results can not be ignored. The early loading method is mainly driven by an ordinary AC motor driving the transmission system, and the loading speed is not adjustable. For elastic elements such as springs, due to the presence of rebound stress, the data collected at the time of rapid compression is collected with slow compression or static compression. The data is very different. Nowadays, variable speed systems, such as AC servo speed control systems, are used to simulate the working conditions of the springs. The internal stresses of the springs are measured in real conditions and provide a basis for spring design.
With the development of computer technology, the shortcomings of simple functions of the SCM have been improved by microcomputers. Intelligent function setting expert system, parameter selection, database, clear window Chinese interface, and simple mouse operation make the most of the spring testing process. The idealized state becomes possible, and the level of intelligence has been greatly improved. The operator can measure and control according to any mode set in advance by simply clicking the mouse, setting different test speeds and parameters during the test. The test mode and the whole test process can be controlled according to the will of the people. The test curve and test data are displayed in real time. The test data can also be calculated, sorted, and exported according to industry standards or company standards. The test process and test can also be performed in the past. As a result of the inquiry, powerful calculation and mathematical statistics functions have replaced the complicated work in the past, which has greatly reduced the amount of human labor. In addition, the application of computer network technology will combine the detection and control machine (referred to as the lower computer) and the master computer of the computing center (abbreviated as the upper computer) to realize the transmission, processing, and comprehensive management of test data. From the upper computer to the next crew to achieve integrated management.
With continuous research on spring testing methods, the understanding will continue to deepen, and spring testing opportunities will develop toward smart people. Test opportunities for the simulation of spring operating parameters, conditions, and environments will continue to emerge, such as salt spray testing machines and high and low temperature tests. Machine and so on.
Third, the status of heavy load spring pressure testing machine and development trends 3.1 The status of heavy load spring pressure testing machine This type of testing machine is generally used for heavy machinery and railway industry spring testing. The plant has been producing large-scale spring pressure testing machines for more than 30 years. During more than 30 years of development, the testing machines have also experienced simple manual control, pendulum-type force measurement, single chip microcomputer control, and electronic measurement. Microcomputer control automatic measurement process.
The loading method is mostly hydraulic. Below 200KN generally use the motor speed control system to drive the mechanical transmission system to load. The TYE-100, TYE-300, and TYE-500, which were originally produced at the plant, are hydraulically loaded, pendulum-forced, and semi-open structures that are primarily used for the measurement of automotive round springs, leaf springs, and railway springs. In recent years, the passenger trains in the railway system have been speeded up and spring standards have been revised. The measurement accuracy, measurement methods, and missing data processing functions of the original testing machines have not been adapted to the requirements of the new standards. The electronic and computer controlled products introduced by the factory have met two different grades and have met with this requirement. They have been widely promoted. After being verified by users, the results are satisfactory and reflect well.
3.2 The development trend of heavy load spring pressure testing machine As with the small spring testing machine, with the improvement of testing technology and the application of computer technology, both testing technology and control technology require a big improvement. From the perspective of test technology, the high resolution and stability of load and displacement are the development trend, and the wide load testing range is also the development trend. From the control technology point of view, electronic, computer-controlled, electro-hydraulic servo microcomputer control will be driven in order to adapt to different consumers. However, the testing accuracy of testing machines will become higher and higher, and the personalization of products will become more and more obvious.
The production of spring testing machines in our country has a history of 50 years. This article discusses the development of the domestic spring testing machine based on our factory's products. Most of the early production spring testing machines were ahead of mechanical transmission and analog measurements, and their accuracy was limited. In recent years, with the development of science and technology, we are absorbing advanced technologies at home and abroad and have cooperated with a number of institutions. We have established low, medium, and high-grade ladders, and we have also moved from a single pull-test to a variety of Test characterization testing is progressing. Has developed six different detection methods: static tension and compression, static torsion, high-frequency tension and compression fatigue, low-frequency tension and compression fatigue, torsion fatigue, on-line detection, etc.: mechanical, electronic, electromagnetic, electro-hydraulic, electrical, Electro-hydraulic servo-type, such as six different loading methods; ranging from 1N-500KN different specifications of more than 170 kinds of products.
First, spring testing machine classification spring testing machine can be classified according to the characteristics of the test can be completed as follows:
Vertical clamping: Single-digit explicit double-digit automatic computer-controlled twisting horizontal clamp: double-digit explicit single-digit automatic computer-controlled pull-pressure dial type single explicit double-numbered full Automatic Microcomputer-controlled Static Performance Test Sorting Load Sorting High Sorting Composite Sorting High-frequency Fatigue Pull-Tension Fatigue Low-Frequency Fatigue Mechanical Type Electro-hydraulic Servo-type Torsional Fatigue II. Application and Development Trend of Medium and Small Load Spring Tension-Pressure Tester 2.1 Status Quo of Spring Tension Testing Machines This type of testing equipment was mostly manually loaded, analog or single-digit years ago. In the past ten years, dual-digital testing equipment has become a mainstream device because: 1), Due to the test force and displacement, the double-digital explicit tester adopts high-precision load sensors, displacement sensors, high-precision amplifiers and other vital components to measure, and has high resolution, which overcomes the human eye reading error and has high measurement accuracy. 2), to use computer technology to make the test force, displacement two parameters related to the measurement, you can set the test parameters in advance to improve the degree of automation and data accuracy; you can also save the test parameters to prepare for the next test, without repetitive input; Can do some data calculations, test data printing. For example, in the test process, TLS-S10001 can set compression (pulling) compression (pull) to high (length) or compression (stretch) deformation, and automatically collect the corresponding test force and store it in the MCU. After calculating the section stiffness, free height, initial tension, and judging whether the spring is qualified, the test data will be automatically printed out, and the stored test data can also be queried.
2.2 Development Trend of Spring Tester The primary requirement of small-load springs, especially large-precision precision springs, is that the test accuracy of the equipment is high, because small changes in displacement can cause large changes in the test force, and guarantee the testing force test. Accuracy is a very easy thing to do, but to ensure the accuracy of another parameter displacement of the spring testing machine is the key to ensure the accuracy of the spring test, and it is also a criterion for judging the accuracy of the spring testing machine. Therefore, more and more users use the accuracy of the displacement test as a measure of the level of the test machine. In the national standards for spring testing machines, the requirements for displacement accuracy are very low, and they cannot meet the requirements for large rigid precision springs. Therefore, for test machine manufacturers, the accuracy of displacement testing must be improved to meet the requirements of users. There are many factors that affect the accuracy of the displacement test, such as the detection method, the overall machine structure, the stiffness of the entire machine, the parallelism of the pressure plate, the measuring elements, the materials, the displacement of the load sensor, etc. As long as these factors are overcome, the accuracy of the displacement is guaranteed. Not a problem. Our company's spring testing machine testing is strictly in accordance with the Japanese standard on the displacement of the test, to ensure that the spring is placed in the pressure plate in different parts of the test force is basically the same, to ensure that in the full range of the test force, any load will not cause load The displacement of the sensor sinks.
In addition, the impact of the loading method of the spring tester on the test results can not be ignored. The early loading method is mainly driven by an ordinary AC motor driving the transmission system, and the loading speed is not adjustable. For elastic elements such as springs, due to the presence of rebound stress, the data collected at the time of rapid compression is collected with slow compression or static compression. The data is very different. Nowadays, variable speed systems, such as AC servo speed control systems, are used to simulate the working conditions of the springs. The internal stresses of the springs are measured in real conditions and provide a basis for spring design.
With the development of computer technology, the shortcomings of simple functions of the SCM have been improved by microcomputers. Intelligent function setting expert system, parameter selection, database, clear window Chinese interface, and simple mouse operation make the most of the spring testing process. The idealized state becomes possible, and the level of intelligence has been greatly improved. The operator can measure and control according to any mode set in advance by simply clicking the mouse, setting different test speeds and parameters during the test. The test mode and the whole test process can be controlled according to the will of the people. The test curve and test data are displayed in real time. The test data can also be calculated, sorted, and exported according to industry standards or company standards. The test process and test can also be performed in the past. As a result of the inquiry, powerful calculation and mathematical statistics functions have replaced the complicated work in the past, which has greatly reduced the amount of human labor. In addition, the application of computer network technology will combine the detection and control machine (referred to as the lower computer) and the master computer of the computing center (abbreviated as the upper computer) to realize the transmission, processing, and comprehensive management of test data. From the upper computer to the next crew to achieve integrated management.
With continuous research on spring testing methods, the understanding will continue to deepen, and spring testing opportunities will develop toward smart people. Test opportunities for the simulation of spring operating parameters, conditions, and environments will continue to emerge, such as salt spray testing machines and high and low temperature tests. Machine and so on.
Third, the status of heavy load spring pressure testing machine and development trends 3.1 The status of heavy load spring pressure testing machine This type of testing machine is generally used for heavy machinery and railway industry spring testing. The plant has been producing large-scale spring pressure testing machines for more than 30 years. During more than 30 years of development, the testing machines have also experienced simple manual control, pendulum-type force measurement, single chip microcomputer control, and electronic measurement. Microcomputer control automatic measurement process.
The loading method is mostly hydraulic. Below 200KN generally use the motor speed control system to drive the mechanical transmission system to load. The TYE-100, TYE-300, and TYE-500, which were originally produced at the plant, are hydraulically loaded, pendulum-forced, and semi-open structures that are primarily used for the measurement of automotive round springs, leaf springs, and railway springs. In recent years, the passenger trains in the railway system have been speeded up and spring standards have been revised. The measurement accuracy, measurement methods, and missing data processing functions of the original testing machines have not been adapted to the requirements of the new standards. The electronic and computer controlled products introduced by the factory have met two different grades and have met with this requirement. They have been widely promoted. After being verified by users, the results are satisfactory and reflect well.
3.2 The development trend of heavy load spring pressure testing machine As with the small spring testing machine, with the improvement of testing technology and the application of computer technology, both testing technology and control technology require a big improvement. From the perspective of test technology, the high resolution and stability of load and displacement are the development trend, and the wide load testing range is also the development trend. From the control technology point of view, electronic, computer-controlled, electro-hydraulic servo microcomputer control will be driven in order to adapt to different consumers. However, the testing accuracy of testing machines will become higher and higher, and the personalization of products will become more and more obvious.