The conditions for improving production efficiency and its relationship with measurement engineering are mainly manifested in three aspects: shorten the delivery date, improve product quality and reduce processing costs. In this paper, as a starting point, combined with the 20th Japan International Machine Tool Exhibition on the measuring instrument exhibits, introduces the development trend of measurement technology.
Measurement technology trends
Nearly ten years, the progress of high-speed machine tools is extremely rapid. From the measuring point of view, some measuring instruments in the high-speed, automation has made significant progress; but from the industry point of view, the rapid progress of measuring instruments lags far behind the machine tool industry, which often results in the process unbalanced. Improve measurement efficiency and strengthen the connection with other processes, so that cargo flow can be smooth, which is to shorten the delivery date of the main topics. In this context, taking a look at the measuring instruments of this exhibition, we can see that many manufacturers have introduced different products that increase the testing speed and improve the operating performance and diversified functions. All of their common features are focused on improving the measurement efficiency. Many New technologies are also developed around this center.
In order to improve product quality, companies are actively developing high reliability and high precision measurement technology. In recent years, with the implementation of ISO 9000s and ISO 9000 standards, the improvement of measuring instrument management system is imminent. Unfortunately, there are not many corrective or standard instruments in this exhibition. Some new measurement technologies and key improvement technologies were on display at the conference. From this, it can be seen that companies are still holding a positive attitude towards technological innovation. For the maintenance of the instrument, users and manufacturers attach great importance. Some of the instruments that are on display are not as demanding as the temperature conditions at the installation site, and some are instruments that combine the capabilities of multiple measurement tools. These new products show that manufacturers are also sparing no effort in developing cost-effective measuring instruments.
Measurement technology to improve efficiency
Non-contact high-speed shape measurement technology
Most shape measurements of large parts such as automobile bodies or pump impellers require high-speed measurements of three-dimensional position data, and so far mainly three-coordinate measuring machines with multi-joint or horizontal cantilever touch probes are used for measurement. But the contact measurement method in the measurement of large parts, will be subject to many limitations, is not conducive to improving the measurement efficiency. In view of this situation, this exhibition has exhibited a variety of non-contact measurement methods, high-density high-speed measurements of these large parts.
Tokyo, Japan Precision Co., Ltd. has developed a new type of CMM, which is a portable three-dimensional optical measuring device that uses interference fringe patterns and triangulation for non-contact measurement. Machine equipped with three cameras, 220mm (vertical) × 330mm (horizontal) field of view coordinates of objects in the maximum density of 4 points / mm2 scan, 30 to 40 seconds to calculate the processing accuracy of 60? M. The machine uses a new data processing technology, for example, measuring 0.5mm pitch equivalent to 1000mm × 1500mm car door data, including the various measurement procedures, including a total of just 40 minutes to complete the measurement operations, and data Analytical processing.
The Comet system exhibited by Tokyo Engineering Systems Co., Ltd. is also a movable non-contact CMM that uses the principle of triangulation but rotates the grating stripes as a measurement target to obtain a plurality of High line data. This measurement method is not susceptible to the surface condition of the measured object, to obtain higher measurement accuracy.
Since the above system can acquire three-dimensional position data on the unit surface, high-speed inspection can be performed compared to the contact measurement method. In addition, high-precision measurement of soft materials is possible because non-contact measurement does not increase the measurement force. Data obtained from such systems can be evaluated against CAD data, so companies must design processes and related application examples to the public. This high-density, high-speed measurement technique is expected to be applied to reverse engineering such as detailed numericalization when designing a model.
OPTON presents a high-speed Moire 3D camera that captures shape data over a wide range of areas at high speed and performs calculations to display the results in real time. The machine can press 10000coma / sec speed measurement 50 × 50 ~ 1000 × 1000mm range of shapes. For example, can be used for vibration, displacement analysis or wavefront observation, online measurement and other fields.
Integration of measurement functions
Integration is also called compound, which contains the meaning of two aspects, one is to improve the function of the measuring machine to increase the test items; the other is to expand the scope of testing, a measuring machine with a variety of different ways the detector can be Detect different measurement objects separately. Measurement operations that used to be performed using multiple measuring machines were completed with a single multi-function measuring machine, thus greatly improving the efficiency and accuracy of the measuring operations.