Fire measurement technology is becoming increasing

2022-08-16
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Measurement technology is becoming increasingly important

in order to adapt to the fundamentally changed market, the manufacturing industry is vigorously developing products with higher added value. In product development, measurement technology plays an increasingly important role. At present, in the field of precision measurement and detection, the measurement accuracy has developed from the original micron level to the nanometer level, and the detection of more micro machined shapes has also attracted more attention. It not only puts forward higher detection requirements for the accuracy and quality of products, such as shape and size, surface roughness, roundness, etc., but also various detection technologies used to verify the accuracy of machining machines are constantly improving

the demand of quality management for measurement technology

the pursuit of production workshops to improve processing efficiency and reduce processing costs is endless. However, the most important thing is to improve product quality. Therefore, it is very important to adopt strict standards and implement thorough quality management

as a means of quality management, the production line needs to be built into a "self-discipline" system, just like using high-precision parts groups to form processing machines and equipping high-precision measuring machines on the production line. It can be predicted that the demand for testing equipment and support systems required for quality management will further increase in the future

in fact, in the production site, the use of gauges to detect products is still the mainstream detection method. The gauge is a special measuring tool customized for various products, which does not have the versatility of being used for other parts. If the design of parts changes, the gauge needs to be redesigned and made. With the diversification of market demand for products, the types of parts are increasing, so that the number of gauges is also increasing. In addition, the production of high-precision gauges requires superb skills. With the replacement of skilled workers, it is difficult to buy high-precision gauges now

the test result obtained by the gauge is only whether the part is qualified and whether it can enter the next process, but the actual dimension value of the part cannot be measured and recorded. Therefore, the measuring instruments that can be used in the production field have attracted much attention. By introducing field measuring instruments, measurement data can be collected and accumulated, and these data can be fed back and applied to the processing process. In addition, by establishing a database, recording and saving measurement data, when quality defects and other problems occur after the parts are sold as final products, the main purpose is to improve their toughness, so that we can know when and where the parts are processed, that is, traceability, and it is easy to find the cause and solve the problem. However, on the other hand, with the improvement of the measurement accuracy of field measuring instruments, higher requirements are put forward for the environmental adaptability, reliability and detection efficiency of the instruments

in the field of precision measurement, the traceability thinking mode for quality management and the importance of evaluating measurement uncertainty have been widely recognized in the manufacturing industry. As a general measurement evaluation, an environment is being formed to study and discuss the accuracy traceability and measurement uncertainty. The evaluation of measurement reliability, consisting of accuracy traceability and uncertainty, forms a modern quality management system represented by the ISO (International Organization for Standardization) standard system

size management can be said to be the basic element of manufacturing. In the future, in order to ensure the safety of the experimental machine; The development prospect of overseas production is promising, which requires the interchangeability of high-precision parts produced in different regions. In the process of globalization, not only large enterprises, but also small and medium-sized enterprises will pay more and more attention to product production based on international common measurement methods. Re understanding the importance of production line measurement and exploring thorough quality management methods are powerful weapons to surpass the tide of globalization

demand for testing

in order to meet the needs of users who constantly pursue high-precision and low-cost production, measuring instruments are required to not only carry out dimensional measurement (comparative measurement) to check the processing quality, but also realize detection (or measuring instruments are installed next to the production line to facilitate the loading, unloading and handling of the measured workpiece). In the shape detection of auto parts, more and more ways such as real-time detection of workpieces and timely feedback of the detection results back to the processing process are used, and the detection shows a strong development trend

to test on the production site, the following requirements of users need to be met: ① improve production efficiency; ② Improve the reliability of measurement results; ③ Adapt to the harsh environment of the production site; ④ Meet the installation space of the measuring device, etc. These requirements are mainly based on the requirements of automated and unmanned measurement. In response to the needs of users to implement quality management and build production lines, measurement equipment manufacturers have implemented providing solutions to specific users' testing problems as an important development strategy. The key to developing a detection solution is whether the measurement technology used to monitor the processing process can be properly matched with the processing equipment. Using the closed-loop method to monitor the tool and the tool change system will improve the quality and efficiency of machining, so as to greatly reduce the production cost

the purpose of detection is to maintain and improve the accuracy, quality and production efficiency of processing and assembly. At present, enterprises attach great importance to transforming the original production line into an efficient production line that can improve the performance and reliability of processing and assembly systems and stably produce high-quality products. Therefore, it is very necessary to support detection technology and measurement equipment

demand for automatic measurement

marposs company was the first to propose and apply contact and non-contact measurement technology development and offline measurement machine. The company combines and customizes many standardized measuring elements and components according to the needs of users to meet the requirements of automatic measurement and control of workpiece size by various machining machines (such as grinding machines). As a package solution, MARPOSS also developed measurement systems for size and shape measurement, acoustic emission monitoring, vibration, grinding volume, etc. corresponding to various grinding machine tools. It is said that the company has received many orders for system solutions and large orders, showing strong market demand

in recent years, the requirements for the measurement accuracy of shape accuracy measuring instruments are becoming increasingly strict, and the measurement demand for micro holes and micro parts is also increasing. New products that meet this demand are constantly being developed. For example, Taylor Hobson's ultra precision non-contact three-dimensional surface shape measuring machine, talisurf, based on the patented special algorithm of Taylor Hobson, uses interference fringes to determine the resonance peak and phase position, and can obtain high-precision information of the tested sample with high measurement speed and high resolution (0.1 angstrom). The resolution and measurement accuracy of the instrument can be calibrated with traceable calibration standards

in the field of gear measurement with strict requirements for shape accuracy, the NC tooth profile lead measuring machine and other measuring equipment of Osaka precision machine can carry out full-automatic and rapid measurement of parameters such as tooth profile, tooth direction and tooth pitch of gears, and adopt a direct transmission servo system that can eliminate the influence of vibration. In the field of automobile manufacturing, how to improve the power transmission efficiency of gears has become a key technology, so it is required to continuously improve the accuracy of gear measuring machines. In order to improve the acceleration performance and comfort of the car, it is very important to eliminate the noise and vibration of the engine and gearbox, especially the gearbox, which requires high gear detection accuracy. As for the gear measurement method, Osaka Seiki believes that "there is no national certification in Japan at present. Therefore, the standard gear as the verification benchmark must be used to confirm the measurement accuracy, and then entrust the relevant certification institutions abroad to test."

demand for high-precision and high-resolution measurement

as a position accuracy measurement device, the public traceability system of linear encoder has not been established in Japan. In 2004, Heidenhain introduced a length accuracy detection device in the Nagoya factory. This is the precision verification device first developed by the German Institute of Physical Engineering (PTB). In terms of length measurement, PTB uses a total of more than 10 length standards to ensure the measurement accuracy in stages based on traceable lasers, reference rulers and linear encoders

for temperature, air pressure, angle and other measurement elements other than length, a traceability system has also been established to implement accuracy verification on a cycle of half a year to several years. In recent years, along with the graduation scale encoder, absolute encoder has gradually become the mainstream. Heidenhain's encoder has achieved high precision, high resolution (up to 10nm) and high-speed communication

digital gauges for measuring dimensional accuracy require high accuracy, high resolution and adaptability to various working environments. Sony manufacturing systems' digital measuring gauge product lineup has added smaller size, higher accuracy and smaller resolution (the minimum can reach 0.1 μ m) The new model can realize high-precision measurement with a maximum range of 12mm. In addition, in order to meet the needs of users for flexible multi-point measurement and multi interface output, the company also launched mg series measurement modules that can flexibly correspond to multi interface output with different number of connecting lines (up to 64 lines). The company has passed the certification of ISO 9001 international standard in order to build a quality assurance system that can obtain the recognition of measurement regulations, meet the needs of users and have a traceability length verification system

committed to providing overall measurement solutions

when measuring with CMM, in order to ensure the traceability of dimensional accuracy and apply it to the inspection of workpiece size, it is necessary to evaluate the uncertainty of measurement. Therefore, it is necessary to evaluate various error factors to calculate the uncertainty. In the standardization of iso/tc213/wgl0 (coordinate measuring machines), the accuracy evaluation standard of coordinate measuring machines has been set, and the evaluation standard of uncertainty is being discussed

there has been competition in further shortening the measuring time of CMM and improving its speed. At present, the technical bottleneck to further improve the speed of moving and rapid acceleration and deceleration of the measuring machine is vibration. By adopting new probe technology, driving mode and high rigidity design, the vibration can be effectively eliminated, making it possible to further improve the moving speed of the measuring machine. Especially when CMM is used for detection, it is required to compensate and correct the temperature error of the workpiece on the processing line. Therefore, measurement equipment manufacturers are committed to providing users with overall solutions to measurement problems in processing

for CMM, there is no precision measuring instrument called "reference gauge" at present. Using gauge blocks can verify the accuracy of one axis and two axes, but there are still deficiencies in verifying the accuracy of three axes as the characteristics of CMM. The quality master of the three-dimensional accuracy verification gauge developed by asanas technology research and development is placed on the measuring workbench of the CMM and measured three times in the positive and negative positions respectively, which can instantly evaluate and simply correct the geometric accuracy of the CMM according to the measured data

development of CNC image measuring machine

as a high-precision measuring instrument for detecting small and thin machined parts such as stamping parts and castings, CNC image measuring machine using CCD camera has developed rapidly. At present, the resolution is less than L μ M ultra-high precision image measuring machine, equipped with CCD camera and resolution of 0.0l μ M laser altimeter and hybrid measuring machine for enhanced height measurement have also been developed

in terms of precision measurement technology, it is important to have higher accuracy and shape

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