Whether the size of the machined workpiece is accurate or not will directly affect the overall performance of the system and the performance of the precision, especially the cylinder valve seat in the engine of the engine, the blade in the aircraft engine, etc., which are designed with precise mechanical structure. High, never allow the slightest deviation. After years of continuous development of measurement technology, today's advanced coordinate measuring machine (CMM) å·³ can accurately measure the size of the workpiece and collect the surface data of the workpiece by scanning. DUKIN, based in South Korea, has cooperated with Renishaw for many years and has introduced many advanced coordinate measuring machines equipped with Renishaw's high-performance grating system in the market, providing fast, cost-effective and stable quality for the industry. Monitoring plan.
Coordinate measuring machine works
The working principle of the coordinate measuring machine is simply to obtain the three-dimensional coordinate value of the surface point of the workpiece to be tested, and calculate the geometric data such as the size and error of the workpiece through the calculator. The mechanism of the traditional typical coordinate measuring machine adopts the gantry type XYZ three-axis design, and the measuring head touches the surface of the workpiece to capture the geometric data of the workpiece in three-dimensional space. The latest technology in the industry, such as Renishaw's proud PH20 and REVO® head mount systems, supports five-axis simultaneous motion, using the synchronous motion of the coordinate measuring machine and the two rotating axes of the head to collect data, greatly improving measurement efficiency. . As one of the important roles of processing quality monitoring, coordinate measuring machines have extremely high requirements for position feedback systems, explaining that most of the coordinate measuring machines on the market mostly use gratings and even higher precision laser feet.
Mr. Ku Tae Young, Technical Manager of DUKIN, introduced the application of Renishaw gratings: “Our coordinate measuring machine has a wide range of products, including standard, high-precision and ultra-high-precision models. Different models have their corresponding specifications. Gratings, from Renishaw's classic RGS series to the ultra-precise RLE laser ruler series, but the most used is the TONiCTM series, which are used in our CHAMP, HERO and VICTOR coordinate measuring machine series. Mainly for markets such as panel, electronics, automotive and aerospace manufacturing."
Categories and characteristics of Renishaw scales
The accuracy of the measuring machine is influenced by numerous peripheral factors, including the temperature of the working environment. Renishaw understands the needs of users and develops a variety of scales with features and advanced working principles for different working environments, matrix materials, specifications, etc., with TONiCTM grating readheads.
The characteristics of the classic RGS gold-plated belt ruler series can be consistent with the expansion coefficient of the measuring machine base. The coordinate measuring machine on the market generally uses marble as the base. Due to its extremely low expansion coefficient, it means that the scale is in the case of temperature fluctuations. The differential movement with the substrate is nearly zero, greatly reducing the impact on system accuracy.
DUKIN Victor series coordinate measuring machine
The other RTLC stainless steel scale works just the opposite. The scale and the expansion coefficient of the base remain independent. Mr. Ku said: "The RTLC series is currently the most used scale model for DUKIN. When you choose to use it, you want to improve the measurement. Accuracy of the machine. The FASTRACK rail is fixed on the base, just like “suspended†on the surface of the substrate. It will not deform to the same extent with the substrate under the change of temperature environment, which means that the two are affected by environmental factors. It has its independence. The advantage is that the requirements of the basic specifications such as flatness and expansion coefficient are lower, and it is more accurate in the accuracy compensation, especially for models with longer strokes."
Renishaw also has a RELM ZeroMet scale series with an expansion coefficient of only 0.75 ± 0.35 μm/m/°C @20 °C, which is a grating rule that is almost unaffected by temperature differences, added by Mr. Ku; The accuracy of the scale is only +/-1 um in length of 1 m, which will further improve the accuracy of the measuring machine, and the price is reasonable compared with the same level. We are actively considering the use of high-end models in the future."
In addition, DUKIN also has an ultra-high-precision coordinate measuring machine developed by Renishaw's RLE series laser scale for measuring applications with high precision requirements such as light gaiters.
TONiC RELM grating series
A tailor-made grating system for measuring machines
The TONiC grating system provides a wide range of specifications to meet the accuracy requirements of most current CMMs. At present, DUKIN's high-precision measuring machine operates at a speed of 3 m/s, using a 0.1 μm resolution TONiC grating, Mr. Ku said. "The product line of TONiC grating is very complete, which brings convenience to us when developing different models. The grating provides high resolution while meeting our speed requirements, and the built-in AGC (gain control) function is also guaranteed. The stability of the grating signal is not affected by the contamination deposited on the scale. As we have learned, the longer the stroke, the more difficult it is to maintain the accuracy of the TONiC grating. Nothing, let us focus on the design of the machine. We have been working with Renishaw since the development of the CMM, and we appreciate that they have been providing professional and efficient after-sales service for many years and will continue to be close and good in the future. Partnership."
Renishaw TONiC grating system
Renishaw REVO__ five-axis head mount system (non-contact image probe)
Mr. Ku Tae Young, Technical Manager, DUKIN
Improve the performance and stability of the coordinate measuring machine
Whether the probe can perform its maximum performance often depends on the positioning accuracy of the CMM, especially REVO, which requires multi-axis synchronization. Mr. Ku said: “The measuring machines currently equipped with REVO probes are put into service by some large automakers and aircraft component manufacturers, and are applied to engine cylinder seats and blades, respectively. We found Renishau’s REVO. The system is particularly efficient at measuring complex, cylindrical workpieces."
In addition, each coordinate measuring machine produced by DUKIN needs to pass the extremely strict test to ensure the accuracy and stability of the system. Mr. Ku said: “Each measuring machine we produce must meet the ISO10360-coordinate measuring machine performance evaluation international standard in the test. Each measuring machine is continuously tested for several months to ensure the machine is running for a long time. It still maintains its high repeatability. The performance of TONiC gratings has been very stable and reliable for many years, so we are very confident that it can be applied to a wide range of models."
Company Profile
DUKIN has been in existence for 27 years. It has provided coordinate measuring machines for many years to include well-known international companies such as Samsung, Hyundai and KIA. The business is also involved in the FPD industry, producing a variety of high-precision equipment for current OLED and curved display panels. Processes, including ELA quasi-component laser annealing equipment and other processes, use AOI inspection equipment, and most of them have Renishaw gratings. DUKIN is a loyal user of Renishaw's CMM probes, from the first generation PH10 series to the later PH20 series, as well as the newer REVO series.
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