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Comment: Many unsourced statements/sections. Most of your sources are WP:PRIMARY. Qcne (talk) 13:55, 14 January 2024 (UTC)
| Industry | Coordinate Metrology |
|---|---|
| Founded | April 26, 1951 |
| Headquarters | , |
Key people | Ralf Christoph (president) |
Number of employees | about 350 |
| Website | werth |
Werth Messtechnik GmbH belongs to the metrology industry as a manufacturer of coordinate measuring machines with optics, probe, computed tomography and multi-sensor systems. Ralf Christoph has been the managing partner of the family-owned company since 1993. Headquarters and production facilities are located in Giessen, Germany. There are subsidiaries in Austria, China, France, Great Britain, Hungary, Italy, Switzerland and the USA.
History
editIn 1951, Siegfried Werth, a mechanical engineer, founded the company "Siegfried Werth Apparate und Maschinen" in Düsseldorf for the development and manufacture of measuring machines, which moved to Giessen in 1958. Among his innovations were the Record E, in 1954 the first profile projector in ergonomic desk design for comparing workpieces with technical drawings, and the Werth Tastauge (probing eye), in 1977 the first optoelectronic fiber sensor for automatic edge detection with measuring projectors. In conjunction with a CN control, this sensor enabled measuring projectors to be automated for the first time in 1980. Shortly before his death in 1982, Siegfried Werth sold the company to the Schunk Group, also based in Giessen.
In 1987, the company founder's widow established the Dr.-Ing. Siegfried Werth Stiftung, a foundation for the promotion and financing of scientific work in the field of non-contact dimensional metrology in memory of his life's work. In the same year, Schunk-Werth-Messtechnik GmbH introduced the first multi-sensor coordinate measuring machine Inspector with zoom optics and integrated laser distance sensor. Multi-sensor coordinate measuring machines have different sensor principles, often both non-contact and contact. During the economic crisis of 1992/93, the then head of development, Ralf Christoph, took over the majority of the shares and continued to run the company with initially 40 employees under the traditional name Werth Messtechnik. Based on his nearly 10 years of experience in the field of image processing for optical metrology during his doctoral thesis for the degree of Dr.-Ing. at the Friedrich Schiller University of Jena and his later Habilitation (post-doctoral lecturing qualification), the company was the first European manufacturer to introduce a coordinate measuring machine with PC-based image processing and Windows operating system with a graphic user interface, the VideoCheck.[1].
In 1998, the first representative of the ScopeCheck series tailored to the requirements of industrial metrology[2] and, together with the Physikalisch-Technische Bundesanstalt (PTB), the smallest and for many applications most accurate micro-probe for coordinate measuring machines Werth Fiber Probe[3] were developed. In 1999, with the Werth Zoom Optics[2][3][4], both magnification and working distance could be automatically adjusted for the first time. In the following years, various machines and sensors were developed and introduced for use in production and laboratory.
Another development step was the introduction of X-ray computed tomography (CT) into coordinate metrology. Werth Messtechnik GmbH also pioneered this technology and in 2005 presented the first measuring machine with X-ray tomography specifically developed for coordinate metrology, called Werth TomoScope.
The VideoCheck UA[5] multi-sensor coordinate measuring machine with 1 nanometer resolution, high temperature stability and many other special technical features, introduced in 2006, has been continuously developed since then. In the following years, Werth expanded the range of applications of its X-ray tomography machines: in 2007, computed tomography coordinate metrology was also available for large and more difficult-to-penetrate workpieces with the TomoScope XL. In 2008, the TomoScope L achieved the compromise between high X-ray voltage up to 240 kV and small machine dimensions.
In the department of multi-sensor systems, a combination of laser distance and image processing sensor with the fiber-probe principle was used to realize the 3D version of the proven micro-probe Werth Fiber Probe[6]
In 2012, the largest Werth coordinate measuring machine with computed tomography was introduced, the TomoScope XL NC, whose X-Ray tube has a maximum tube voltage of 450 kV. Starting from 2014, a probe head with multi-sensor system WMS40 allowed the combination of several tactile and optical sensor principles. With two, later three separate sensor axes, the multi-sensor systems could be used even more flexibly with the ScopeCheck FB from 2016 onwards. In 2017, a new trend in computed tomography began with the inexpensive TomoScope XS[7][8] with the advantages of proven technology in a compact format. The X-Ray tube in monoblock design with transmission target combines measurement about five times faster than conventional systems with high resolution and low maintenance costs.
This was followed in 2019 by the TomoScope FQ[9], which has a greatly increased measuring speed and a novel evaluation concept, making it particularly suitable for integration into production lines. In the following year, high-performance sensors made it possible to dispense with mechanical machine axes, and the TomoScope XS FOV was created as a low-cost machine with X-ray computed tomography for use close to and integrated into production. Also in 2020, Werth expanded the multi-sensor systems with the Chromatic Focus Zoom multi-sensor, which consists of a telecentric 10x zoom optic with a confocal distance sensor integrated into the beam path.
The quality management system according to DIN EN ISO 9001 and the DAkkS laboratory[10] for the calibration of coordinate measuring machines according to DIN ISO 17025 are designed to ensure the reliability and accuracy of the machines.
Company structure
editThe company has more than 350 employees in Germany, the Werth Group about 400. Werth Messtechnik GmbH is a family business whose shareholders focus on long-term corporate growth. Accordingly, the company's earnings are mainly used for the development of new products, for investments and for the expansion of the company's structures. For decades, this has resulted in mostly double-digit growth rates for Werth.
Products/application fields
editThe range of equipment extends from 2D scanners to highly accurate 3D multi-sensor and computed tomography coordinate measuring machines with six or seven axes. Werth coordinate measuring machines are used, for example, in the aerospace, automotive, electronics, energy, extrusion, jewelry, tooling, medical and plastics industries.
Coordinate measuring machines with optical and tactile sensors
edit- QuickInspect: 2D image processing measuring machines for quick and easy measurement "in the image" with subpixeling on workpieces such as stamped (bent) parts
- FlatScope: high-resolution measurement "in the image" of large 2D workpieces such as aluminum/window profiles or printed circuit boards
- ScopeCheck series: 3D coordinate measuring machines for production monitoring with multi-sensor systems; typical sensor configuration: image processing, touch probe and laser distance sensor; for example, measurement of plastic parts with the image processing sensor in combination with touch probe for geometrical deviations and laser sensor for determining the flatness
- VideoCheck series: highly accurate 3D multi-sensor coordinate measuring machines, also with more specialized sensors such as the patented tactile-optical Werth Fiber Probe for very small geometries and sensitive surfaces
- Vertical machines: tool and shaft measurement without deflection on vertical rotary axis with wobble correction, e.g., diameters and lengths can be measured with image processing, geometrical deviations tactilely
Coordinate measuring machines with computed tomography
edit- TomoScope S, L and XL series: computed tomography machines in various sizes for complete and non-destructive capture of the workpiece including internal geometries, fast visual inspection of deviations from the nominal condition by comparison with CAD model
- TomoScope XS series: cost-effective computed tomography compact machines for fast and high-resolution measurements anywhere in the company
- TomoScope FQ series: computed tomography machines for fully automated atline and inline measurements
Literature
edit- Ralf Christoph, Hans Joachim Neumann: Multisensor Coordinate Metrology. Second, revised edition. SZ Scala GmbH, Munich 2019.
- Ralf Christoph, Hans Joachim Neumann: X-ray Tomography in Industrial Metrology. Third, revised edition. SZ Scala GmbH, Munich 2018.
External links
editReferences
edit- ^ "Lateral Thinkers". Retrieved 2023-11-06.
- ^ a b "Measuring in minutes – Production-related quality assurance of complicated mold inserts". Retrieved 2023-11-06.
- ^ a b "Multisensor meets high-frequency technology". Retrieved 2023-11-06.
- ^ "The right technology for every measuring task – 3D measurement service with multisensor technology and computed tomography". Retrieved 2023-11-06.
- ^ "On the test bench – Coordinate measuring machines: from qualification to measurement process capability". Retrieved 2024-01-09.
- ^ "Measurement of micro-geometries with the fiber probe". Retrieved 2024-01-09.
- ^ "Compact CT machine for accredited testing laboratory – non-destructive analysis of 3D-printed titanium implants". Retrieved 2024-01-09.
- ^ "Complete data sets in record time – CT compact device replaces conventional 3D coordinate metrology". Retrieved 2024-01-09.
- ^ "For 100 per cent safety – Production of brake systems with automated inline measurement". Retrieved 2024-01-09.
- ^ "Accreditation of Werth DAkkS laboratory". Retrieved 2024-01-09.
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