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Tech Info
Non-contact detection Technical Analysis for CNC machined parts
For CNC machining precision parts in an ideal situation, the use of optical or other non-contact detection technology to measure micro-machining complex parts is probably the best way, but often it is not easy to achieve. Advantages of optical measurement system to measure speed, does not cause deformation of parts, but it also has some limitations, such as the visible edge of the workpiece is often not reflect subsequent partial occlusion.
In addition, optical measurement systems often can not determine the three-dimensional shape such as a position accuracy of parallel, vertical, cylindrical, flatness and the like. However, the advantage of several sensing technologies together and build a single measurement system, it is possible in a single installation of all critical parameters to measure complex parts. These multi-sensor measurement system typically comprises a non-contact sensors - video, and white, or laser probe - used to measure the surface and edge of trigger and scanning probe can be measured non-contact detection device can not be reached position, such as the depth of the stepped bore.
Probe microscale traditional measurement techniques (such as coordinate measuring machine touch trigger probe) are evolving to meet changing needs. Today's sensors have different trigger force measurement, the measuring rod of different lengths and different probe sizes and materials and the like. However, when the scale becomes smaller, there is a physical limit, then the small size of the probe would be difficult to ensure reliable triggering. For example, the fine pre-trigger probe may be bent, resulting in erroneous indication of the position of the workpiece surface: long probe or may occur "chatter" (touching the edge of the hole or slot) while sampling the sender, but the actual the stylus tip does not come into contact with the wall of the hole measured position. Due to advances in manufacturing technology and the use of electrical discharge machining (EDM), it has been able to create many micro-structures (such as micro-holes, mouth), but this is slightly difficult to measure structure.
In some cases, the size or length of the probe stylus tip trigger probe may cause the trigger measurement becomes impossible. When measuring small grooves, holes or opening pitch, using triggered measurement techniques may not be appropriate, because the conventional probe must deflected position only after a certain sender sampling. In machining, the use of the probe generally can be divided into two, the first probe is installed as an accessory in the original machine, also known as the spindle probe installation: The second probe is completely disposed in the machine, known as integrated probe. The latter can be folded back so it does not interfere with work tool system, do not need to replace the mechanism. Machine integrated probe is reliable, easy to use, but also reduces the processing such as cable, anti-electromagnetic interference and provide power, and many other troubles. After the installation of a traditional machine tool probe integration, he became one able to perceive and reflect the state of the environment of the machine. In the machined parts are getting smaller, more and more types today, with this function machine is a great value.
Integrated in the machine tool probe when not in use can be folded back in Figure 2 is equipped with the Renishaw TP20 probe Datron machine can be used to achieve a constant cut on a round object of deep processing of communication with the controller is the advanced detection technology and tools controllers and software integrated together. For example, DatronDynamics company as a high-speed CNC milling and engraving machine manufacturer, has successfully developed the third generation integrated detection system. It is first tested to ensure proper positioning of the workpiece, the workpiece is then scanned to identify and to select the appropriate machining procedures. Dr. WalterSchnecker The company's president, said, "Even if an operator mistakenly installed other workpieces, the machine can still produce qualified products, because the probe is determined by scanning the correct machining program of the workpiece should be used in those constantly changing workpiece small workshop recognized that due to the machine with automatic detection precision workpiece clamping function, thereby reducing the time it takes to change a workpiece and shorten the processing cycle. "
Z correction Datron probe installed on the machine to recognize the irregular surface topography on the workpiece, which may be irregular morphology accidental factors, it may also be specially designed to help probe the machine dynamic compensation. Probe is measured along the rough surface, and the data input machine controller, the controller for the uneven rough surface or workpiece position is automatically adjusted to reduce the installation time of the workpiece blank, reducing the scrap rate. Z correction probe permanently installed near the main shaft at the extended only when needed by a pneumatic drive. As a result of integrated design, so no replacement may not interfere with the working of the cable, the measuring device is not damaged by sudden start of the spindle.
When three-dimensional inspection, Z correction probe can determine the XYZ coordinate system and the position of the irregular shape of the workpiece surface to find the center position of the hole and the boss, the previously measured blank before processing, compensation allowance changes in input data ISO9000 quality control information chain, and allow reverse engineering a variety of parts for manufacturing. Equipped with Renishaw TP20 probe Datron machining tool it can be used for measurement of complex parts and their characteristic parameters. As identified on the circular surface of the sculpture "is usually through a three-dimensional surface depth programmed to implement changes in processing and guarantee equal engraving depth while using TP20 probe scanning the workpiece surface after" For the irregular surface changes, the database can be processed automatically three-dimensional processing without programming.
TP20 is a six-way movement of trigger probe system that uses a shortened machining cycle. Slight contact measurement Zeiss F25 measuring machine using a measuring optical system combines contact measurement system that has three - two sensors for measurement, one for auxiliary operations. Full scan a touch sensor based on the piezoelectric thin film for both point-contact measurement, can also be used for full-scan measurements. The company is responsible for precision measuring machine new product manager GerritdeGlee noted that the probe diameter of the probe can be as small as 0.12mm, probing force only generally CMM probing force 1/100. "This is very important because the workpiece clamping force can be made smaller. When the workpiece clamping Micro easily deformed, and therefore must be very careful to clamp the workpiece in order to successfully complete the measurement, without causing deformation of the workpiece." F25 measuring machine optical measurement system is mounted next to the touch sensor, it can be used alone, it can also be used in combination with the touch sensor.
The system has a ring-shaped light source, light intensity and illumination direction programmable control to reduce unwanted shadows. In the measurement of very small parts or micro-topography, difficult for the operator to observe the operation. For example, F25 measuring machine 0.12mm probe head is impossible to read without amplification of. Thus the measuring machine is equipped with an optical system, it will be measured after the regional contact probe magnified displayed on the monitor screen so that the operator programming. The optical detection system measurement results can be displayed directly on the screen measurement software. F25 measuring machine is not a workshop with the instrument, its high accuracy, but does not have the control function of the ambient temperature at the workshop. The instrument measuring uncertainty is less than 250nm, at such a high accuracy, the effect of temperature on the measurement will be immense.
Instruments used with good thermal stability of the glass ceramic foot baseline. This glass-ceramic material was originally developed for the telescopes, the impact can be avoided reference scale coefficient of thermal expansion of the measurement uncertainty, and the reference foot itself is no longer required temperature sensors. Non-contact probe Smartscope US OGP company introduced multi-sensor measuring system when one kind of probing probe without bending micro-probing techniques. This is called "feather probe" technology uses a micro motion in a constant state of micro-probe. The probe of the probe is very thin, measuring the diameter of the probe tip end portion of only 0.125mm.
When the stylus tip close to the workpiece, the workpiece surface cause changes in micro-movements of the stylus tip, this change is recorded as a measurement signal. This does not occur when the probe probing bending, probing force is less than 1mg. OGP company said, "feather probe" suitable for measuring small grooves, holes or openings inclination can also be used to measure soft or deformable workpieces. It can be used to measure the XYZ axes. To prevent damage to the probe retracted when not in use within a protective cover when projecting the need for automatic measurement. Another surface OGP company's non-contact measurement sensor is called "Rainbow probe" white light sensor, which in the lateral direction and height have a very high resolution, the resolution Z-axis can reach sub-micron level. The technology uses a set of lenses extend axially in the dispersion in principle, each wavelength white light is focused on different points of the optical axis.
As a result of chromatographic analysis of the "Rainbow probe" changes in the reflectance of the measured surface roughness and insensitive. When used in multi-sensor measuring system, the probe can almost along the contour of the surface of any shape, for fine surface morphology of high-frequency non-contact scanning measurement. You can create a zone of the surface topology by scanning neighborhood. Multi-sensor system for integration with complex geometries and free contour of the workpiece, or hole tolerance margin which feature points is small, the mutual positional relationship between the workpiece many feature points is very important, we need a multi-sensor measuring systems are tested.
Multi-sensor measuring machine can use special sensors for specific morphology of the workpiece is measured as part of the overall characteristics of the workpiece. In the multi-sensor measurement system, the sensor software integration is an important development content. Good integrated software package for all sensors can be used to calibrate these sensors in the measurement path can be used at any point: The difference between the integrated software package is required for each sensor prior to each use are calibrated.
In addition, a good integrated software package can be any one measurement sensor data processing and analysis, so that you can easily handle video edge point in the measurement data obtained during the laser point cloud data and contact scanning probe Measurement data. OGP president FredMason noted, "Compared with the dedicated micro-measurement system, a large number of outstanding advantages of the process of multi-sensor measuring system with micro-probe is able to measure the microstructure and macroscopic morphology data size and position of the entire workpiece data included in the same data file. " High-resolution measurement system has both a large range of traditional video measuring system, but also has a micro-probe can be critical microscopic characteristics of a workpiece or a certain key parameters were measured.
Micro-sensors can be applied to almost any size, multi-sensor measuring system. For video measuring system, the main consideration should be to ensure that the necessary equipment, high-resolution positioning capability over the entire measuring range, in order to obtain high magnification images of specific parts of the workpiece. Only in very high accuracy measurement system under the circumstances, the micrometer head in order to achieve the highest measurement accuracy. Only the video image is measured with the micro-probe measurements combined in the same measurement in order to obtain the complete workpiece features while minimizing the impact of human factors.
In addition, optical measurement systems often can not determine the three-dimensional shape such as a position accuracy of parallel, vertical, cylindrical, flatness and the like. However, the advantage of several sensing technologies together and build a single measurement system, it is possible in a single installation of all critical parameters to measure complex parts. These multi-sensor measurement system typically comprises a non-contact sensors - video, and white, or laser probe - used to measure the surface and edge of trigger and scanning probe can be measured non-contact detection device can not be reached position, such as the depth of the stepped bore.
Probe microscale traditional measurement techniques (such as coordinate measuring machine touch trigger probe) are evolving to meet changing needs. Today's sensors have different trigger force measurement, the measuring rod of different lengths and different probe sizes and materials and the like. However, when the scale becomes smaller, there is a physical limit, then the small size of the probe would be difficult to ensure reliable triggering. For example, the fine pre-trigger probe may be bent, resulting in erroneous indication of the position of the workpiece surface: long probe or may occur "chatter" (touching the edge of the hole or slot) while sampling the sender, but the actual the stylus tip does not come into contact with the wall of the hole measured position. Due to advances in manufacturing technology and the use of electrical discharge machining (EDM), it has been able to create many micro-structures (such as micro-holes, mouth), but this is slightly difficult to measure structure.
In some cases, the size or length of the probe stylus tip trigger probe may cause the trigger measurement becomes impossible. When measuring small grooves, holes or opening pitch, using triggered measurement techniques may not be appropriate, because the conventional probe must deflected position only after a certain sender sampling. In machining, the use of the probe generally can be divided into two, the first probe is installed as an accessory in the original machine, also known as the spindle probe installation: The second probe is completely disposed in the machine, known as integrated probe. The latter can be folded back so it does not interfere with work tool system, do not need to replace the mechanism. Machine integrated probe is reliable, easy to use, but also reduces the processing such as cable, anti-electromagnetic interference and provide power, and many other troubles. After the installation of a traditional machine tool probe integration, he became one able to perceive and reflect the state of the environment of the machine. In the machined parts are getting smaller, more and more types today, with this function machine is a great value.
Integrated in the machine tool probe when not in use can be folded back in Figure 2 is equipped with the Renishaw TP20 probe Datron machine can be used to achieve a constant cut on a round object of deep processing of communication with the controller is the advanced detection technology and tools controllers and software integrated together. For example, DatronDynamics company as a high-speed CNC milling and engraving machine manufacturer, has successfully developed the third generation integrated detection system. It is first tested to ensure proper positioning of the workpiece, the workpiece is then scanned to identify and to select the appropriate machining procedures. Dr. WalterSchnecker The company's president, said, "Even if an operator mistakenly installed other workpieces, the machine can still produce qualified products, because the probe is determined by scanning the correct machining program of the workpiece should be used in those constantly changing workpiece small workshop recognized that due to the machine with automatic detection precision workpiece clamping function, thereby reducing the time it takes to change a workpiece and shorten the processing cycle. "
Z correction Datron probe installed on the machine to recognize the irregular surface topography on the workpiece, which may be irregular morphology accidental factors, it may also be specially designed to help probe the machine dynamic compensation. Probe is measured along the rough surface, and the data input machine controller, the controller for the uneven rough surface or workpiece position is automatically adjusted to reduce the installation time of the workpiece blank, reducing the scrap rate. Z correction probe permanently installed near the main shaft at the extended only when needed by a pneumatic drive. As a result of integrated design, so no replacement may not interfere with the working of the cable, the measuring device is not damaged by sudden start of the spindle.
When three-dimensional inspection, Z correction probe can determine the XYZ coordinate system and the position of the irregular shape of the workpiece surface to find the center position of the hole and the boss, the previously measured blank before processing, compensation allowance changes in input data ISO9000 quality control information chain, and allow reverse engineering a variety of parts for manufacturing. Equipped with Renishaw TP20 probe Datron machining tool it can be used for measurement of complex parts and their characteristic parameters. As identified on the circular surface of the sculpture "is usually through a three-dimensional surface depth programmed to implement changes in processing and guarantee equal engraving depth while using TP20 probe scanning the workpiece surface after" For the irregular surface changes, the database can be processed automatically three-dimensional processing without programming.
TP20 is a six-way movement of trigger probe system that uses a shortened machining cycle. Slight contact measurement Zeiss F25 measuring machine using a measuring optical system combines contact measurement system that has three - two sensors for measurement, one for auxiliary operations. Full scan a touch sensor based on the piezoelectric thin film for both point-contact measurement, can also be used for full-scan measurements. The company is responsible for precision measuring machine new product manager GerritdeGlee noted that the probe diameter of the probe can be as small as 0.12mm, probing force only generally CMM probing force 1/100. "This is very important because the workpiece clamping force can be made smaller. When the workpiece clamping Micro easily deformed, and therefore must be very careful to clamp the workpiece in order to successfully complete the measurement, without causing deformation of the workpiece." F25 measuring machine optical measurement system is mounted next to the touch sensor, it can be used alone, it can also be used in combination with the touch sensor.
The system has a ring-shaped light source, light intensity and illumination direction programmable control to reduce unwanted shadows. In the measurement of very small parts or micro-topography, difficult for the operator to observe the operation. For example, F25 measuring machine 0.12mm probe head is impossible to read without amplification of. Thus the measuring machine is equipped with an optical system, it will be measured after the regional contact probe magnified displayed on the monitor screen so that the operator programming. The optical detection system measurement results can be displayed directly on the screen measurement software. F25 measuring machine is not a workshop with the instrument, its high accuracy, but does not have the control function of the ambient temperature at the workshop. The instrument measuring uncertainty is less than 250nm, at such a high accuracy, the effect of temperature on the measurement will be immense.
Instruments used with good thermal stability of the glass ceramic foot baseline. This glass-ceramic material was originally developed for the telescopes, the impact can be avoided reference scale coefficient of thermal expansion of the measurement uncertainty, and the reference foot itself is no longer required temperature sensors. Non-contact probe Smartscope US OGP company introduced multi-sensor measuring system when one kind of probing probe without bending micro-probing techniques. This is called "feather probe" technology uses a micro motion in a constant state of micro-probe. The probe of the probe is very thin, measuring the diameter of the probe tip end portion of only 0.125mm.
When the stylus tip close to the workpiece, the workpiece surface cause changes in micro-movements of the stylus tip, this change is recorded as a measurement signal. This does not occur when the probe probing bending, probing force is less than 1mg. OGP company said, "feather probe" suitable for measuring small grooves, holes or openings inclination can also be used to measure soft or deformable workpieces. It can be used to measure the XYZ axes. To prevent damage to the probe retracted when not in use within a protective cover when projecting the need for automatic measurement. Another surface OGP company's non-contact measurement sensor is called "Rainbow probe" white light sensor, which in the lateral direction and height have a very high resolution, the resolution Z-axis can reach sub-micron level. The technology uses a set of lenses extend axially in the dispersion in principle, each wavelength white light is focused on different points of the optical axis.
As a result of chromatographic analysis of the "Rainbow probe" changes in the reflectance of the measured surface roughness and insensitive. When used in multi-sensor measuring system, the probe can almost along the contour of the surface of any shape, for fine surface morphology of high-frequency non-contact scanning measurement. You can create a zone of the surface topology by scanning neighborhood. Multi-sensor system for integration with complex geometries and free contour of the workpiece, or hole tolerance margin which feature points is small, the mutual positional relationship between the workpiece many feature points is very important, we need a multi-sensor measuring systems are tested.
Multi-sensor measuring machine can use special sensors for specific morphology of the workpiece is measured as part of the overall characteristics of the workpiece. In the multi-sensor measurement system, the sensor software integration is an important development content. Good integrated software package for all sensors can be used to calibrate these sensors in the measurement path can be used at any point: The difference between the integrated software package is required for each sensor prior to each use are calibrated.
In addition, a good integrated software package can be any one measurement sensor data processing and analysis, so that you can easily handle video edge point in the measurement data obtained during the laser point cloud data and contact scanning probe Measurement data. OGP president FredMason noted, "Compared with the dedicated micro-measurement system, a large number of outstanding advantages of the process of multi-sensor measuring system with micro-probe is able to measure the microstructure and macroscopic morphology data size and position of the entire workpiece data included in the same data file. " High-resolution measurement system has both a large range of traditional video measuring system, but also has a micro-probe can be critical microscopic characteristics of a workpiece or a certain key parameters were measured.
Micro-sensors can be applied to almost any size, multi-sensor measuring system. For video measuring system, the main consideration should be to ensure that the necessary equipment, high-resolution positioning capability over the entire measuring range, in order to obtain high magnification images of specific parts of the workpiece. Only in very high accuracy measurement system under the circumstances, the micrometer head in order to achieve the highest measurement accuracy. Only the video image is measured with the micro-probe measurements combined in the same measurement in order to obtain the complete workpiece features while minimizing the impact of human factors.
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