Geometry Measuring System (GMS)

Large Pipe measurement

Basic measurement principle

Combination of the GMS-P (Profile cross section) that has been used since 2014, and the newly developed GMS-S (Straightness) permits determination of the outer geometry even of large workpieces.
The cross-sections are measured in transport and afterwards the longitudinal workpiece axis is determined. This way the outside of the pipe can be determined with great precision.
The principle of the GMS-P is based on a laser cutting procedure.
A laser line is projected to the outside surface of the pipe. Industrial cameras are used to create images of this laser line in high frequency. These images in turn are used to determine the precise outer geometry with a dedicated evaluation software. Welds, notches and grinding points are recognised precisely and their contours are documented.
The GMS-S is performed with three linearised industrial cameras arranged and stereoscopically to each other. The images of the pipe from
different perspectives are also analysed and evaluated by the dedicated evaluation software.

The advantages are clear

  • Objective recording of the actual pipe
    geometry across the entire pipe.
  • Reliable compliance with customer requirements.
  • Assignment of the results to each workpiece.
  • Documentation of the quality.
  • Autonomous or integrated into your production line.
  • Direct reaction to deviations is possible.

Measuring speed

GMS–P: 40Hz
GMS–S: t < 2 sec.

Measuring accuracy

GMS–P: ±0,2 mm
GMS–S: ±0,3 mm/m

The result

The measuring results also be summarised in the light of „Big Data“. Interrelations with parameters from production can be identified with suitable data mining algorithms. This way, you can build a comprehensive history and compile statistics on cause research – the ideal basis for permanently high product quality.

Measurement results in practice

The GMS-P, which has proven its worth since 2014, reliably supplies the required measuring results even under difficult conditions. Automatic recalibration is possible in less than 2 min. with the integrated calibration frame. Retrofitting to a different diameter or adjustment is not necessary
either. This avoids interruption of production. This measurement has also been successfully integrated in the hot tube area of up to 1,000 °C. The GMS-S has also been tried in practice. The components for post-calibration are integrated; it can be performed within 2 sec.

Straigthness measurement

Basic measurement principle

Straightness of the material plays an ever-increasing role in the production of tubes and rods. There are ways to correct straightness – but the manufacturers are still facing the problem of recording straightness. Existing solutions on the market make your profile rotate or record straightness only in sections and add up the results. Arising vibrations and the different bend of the material due to gravity may strongly distort the results of measurements.

Straightness measurement with compensation for gravity

The patented GMS-S (Straightness) comprises two functional components.
On the one hand, there is the special static support of the workpieces in the measuring position. On the other hand there is the optical measuring technology.
The support system developed for this special measuring procedure is equipped with multiple weight sensors. These weight sensors determine the respective supporting forces in two axes that are orthogonally to each other, which are converted into a bending module together with the theoretical values (calculated from the cross-section and length).
Additionally, three linearised cameras arranged stereoscopically to each other record images from various perspectives. This second measurement results in the actual course of this workpiece with standard-compatible measuring results.
By overlaying the results from the supported and the linearised images in the dedicated evaluation software, deformations can be determined for the first time. The negative influences from gravity or vibrations are eliminated.

The result is independent of the position

The advantages are clear

  • Objective recording of the actual straightness.
  • Secure compliance with customer requirements.
  • Assignment of the results to the workpiece.
  • Documentation of the quality.
  • Autonomous or integrated into your production line, in cross- or longitudinal transport
  • Direct reaction to deviations is possible.

Measuring speed

3sec. < t < 5 sec.

Measuring accuracy

Repeat accuracy of σ=0,02 [mm/m] – regardless of the position of the workpiece

The result

The measuring results can also be summarised in the light of „Big Data“. The interrelations with parameters from production can be identified with suitable data mining algorithms based on this. This way, you can build a comprehensive history and compile statistics on cause research – the ideal basis for permanently high product quality.

Successful in practice

The GMS-S reliably supplies the required measuring results even under difficult conditions. Recalibration is possible in less than 2 sec. with the integrated components. Retrofitting to a different diameter or adjustment is not necessary either. This avoids interruption of production.

GCS measurement of pipe ends

The geometry control system for measurement of pipe ends, developed by MSG Maschinenbau GmbH, starts where conventional measurement technology has to stop. Tactile measurement or manual testing can be extremely expensive and error-prone in case of pipe ends with ridges, conical surfaces, radii, bevels, welded seams or very large dia­meters. In the rough production environment, we not only offer advanced measurement technology, but also solid and customised design solution.

The following parameters can be measured by default:

  • minimum internal diameter
  • maximum internal diameter
  • three-point measurement internal diameter
  • minimum external diameter
  • maximum external diameter
  • minimal wall thickness
  • maximal wall thickness
  • average wall thickness
  • external least square circle diameter
  • internal least square circle diameter
  • internal maximum inscribed circle
  • eccentricity
  • ovality

Even in the rough production environment, pipe end measurement is extremely reliable and has been used successfully in many different sectors in the pipe industry. It can be integrated smoothly into existing production data acquisition systems.

GCS external pipe measurement

An extension of the GCS measurement of pipe ends is the GCS external pipe measurement technology, also developed by MSG. This system calculates the cross-section profile of the pipe based on a four laser camera system, installed in a sturdy measurement case, and using our special software to generate a highly precise three-dimensional pipe profile.

Measured by default are:

  •  best fit diameter
  •  maximum external diameter
  •  minimum external diameter
  •  ovality
  •  circumference
  •  welding seam geometry

Our robust and customised mechanical design, which meets the requirements of the measurement environment exactly, is essential for the GCS external pipe measurement.

Due to our expertise in special machine engineering it is ideally suited to the surrounding conditions of a pipe-mill. In combination with the GCS measurement of pipe ends, very good measurement system analysis values and a high repeat accuracy, our geometry control systems are an ideal enhancement of quality assurance in ongoing production. Again, smooth integration into a production data acquisition system is possible.

3D Measurement System for bent tubes

MSG measuring cell

The MSG measuring cell is a touch-free optical measurement system for measuring bent tubes and wire parts, for example in the automotive industry, furniture industry and wire industry.
The tube to be measured is placed in an arbitrary position on a special disk. After the diameter of the tube is entered, an exact measurement will be conducted in only a few seconds.
In this process, a number of LED installed above the disk are selected successively and the shadows projected onto the disk are registered by a fixed industrial camera and converted into a three-dimensional model of the pipe using transformation algorithms.

The system offers the following advantages:

  • precise registration of 3D geometry data
  • Measurement accuracy angles approx. 0.1°, diameter 0.01 mm
  • Measurement of components using shadows – no interference of reflecting surfaces
  • Measurement of constant bend radii AND freeform bending parts
  • Use in quality assurance and for correction of bending data
  • The part to be measured must not be adjusted or clamped
  • Simply place in measuring area and start
  • Very good price-performance ratio

Measurement Technology –
Special applications

In recent years, MSG was able to solve a wealth of customer problems in industrial optical measurement technology. In this sector, the combination with our expert knowledge in special mechanical engineering proved to be extremely advantageous for our customers.

We take a holistic approach to measuring your product – as individual part or as part of a production process. We can also integrate it smoothly into existing systems. We thoroughly investigate your needs, test physically relevant configurations, conduct a feasibility analysis and select the best system for you.

Your inquiry

Please contact us to talk about your individual project.