DE102018113663A1 - Method for in-process measurement of process parameters and component properties in the production of hollow profiles and a measuring device therefor - Google Patents

Abstract

The invention relates to a method for measuring at least one process parameter and / or at least one quality characteristic profile in the production of hollow profiles (12) and a measuring device (18) for measuring at least one process parameter in the production of hollow profiles (12). It is provided In that at least one measuring device (18) is provided, measuring of the at least one process parameter and / or at least one quality parameter by means of the at least one measuring device (18). The measuring of the at least one process parameter is performed in real time during a manufacturing process of the hollow profile (12) to be produced. The at least one process parameter is provided as at least one manipulated variable for a control and / or regulation of the production process to a control unit (20) of the production process. The measuring device (18) comprises at least one temperature sensor (24A) for grid measurement and / or at least one temperature sensor (24B) for point measurement and / or at least one measurement component for measuring a profile internal geometry of the hollow profile (12) to be produced and / or at least one measuring system for measuring a Fiber course in the hollow profile (12) to be produced and at least one connection device (17) and at least one guide device (34).

Description

The invention relates to a method for in-process measurement of at least one process parameter and at least one component property in the production of hollow profiles and a measuring device therefor.

In the production of hollow profiles in the extrusion process or especially of FRP profiles (FRP = fiber composite plastic) in the pultrusion process parameters (such as tool temperature, drawing speed, fiber and resin supply) in the manufacturing process have a significant influence on the technical properties of the profiles. Manufacturing processes can be, for example, the pultrusion process, the extrusion of metal (alloys) or the extrusion. By measuring relevant parameters and returning the information as a manipulated variable in a process-integrated control or regulating system, for example, the pultrusion process can be set or regulated to the desired profile properties and tolerances. The first approaches are already known from the prior art, in which accompanying measures are provided during the manufacturing process.

For example, from the publication DE 198 05 584 A1 to derive a system and method for material testing of materials, as well as a material and a method for its production as known. Sensors are integrated directly into the material. The sensors can absorb energy and send material information to an external evaluation unit. The system accordingly includes an excitation unit and an evaluation stage for evaluating the signals. In the method, energy is first introduced into the material and then the response signals are evaluated, the response signals being dependent on the state of the material. A strict separation of all components of the measuring device of the material to be measured is not provided.

From the DE 10 2007 059 865 A1 is a method for producing a shaped article by layering build up of powdered metallic material as known to remove. In this case, several layers of a powdered, metallic material are successively placed one above the other layer by layer to produce a shaped body. The layers are partially melted with a high-energy beam, so that said molding can be produced. To achieve defined characteristic values, the material is influenced locally metallurgically. A measurement of process parameters is limited, for example, only to the settings of the high-energy beam. The use of a separate measuring device is not provided.

From the DE 10 2014 200 955 A1 is a method and a system to take as known, wherein the detection of local temperatures of a arranged in a pressing tool component made of a fiber composite material is in focus. In this case, a sensor arrangement is arranged within the component itself so that a temperature measurement is made possible at least by a portion of the component. In particular, it is provided that the sensor arrangement is materially incorporated into the component and also remains there. The measurements of other process parameters are not provided.

The presented solutions are either only to be used with specially prepared materials or only conditionally enable an efficient measurement of a multitude of process parameters, since usually only one specific process parameter is in the focus. In addition, temperatures and temperature profiles can often only be measured from the outside. Temperatures on the inside and inside of hollow profiles can not be measured yet. Geometrical tolerances, such as wall thicknesses and side distances of hollow profiles, can so far only be measured after cutting to length, that is to say after severing the continuous profile. Real-time control of the process is therefore not possible. The nature of the inner surface and the fiber profiles within the profile can also be measured only after the profile has been separated, thus creating an access to the inside of the profile. Now, if the process parameters, for example, a pultrusion process to be adjusted or optimized by measuring the tolerances and technical properties of already manufactured profiles, this is so far only possible by separating and examining the continuous profile. This procedure is usually associated with much effort and time, so that the start of new pultrusion processes are associated with long start-up times and high reject rates. A real-time monitoring of the production process is not yet possible.

It is an object of the invention to provide a method and a measuring device so that an efficient measurement and recording of a large number of process-technical parameters as well as the profile properties of hollow profiles during production is made possible.

In a preferred embodiment of the invention, it is provided that a method for measuring at least one process parameter and / or at least one quality parameter of the produced Profils in the production of hollow profiles is provided. The method comprises the following steps: providing at least one measuring device, measuring the at least one process parameter and / or at least one quality characteristic of the profile to be produced by means of the at least one measuring device, wherein the measuring of the at least one process parameter during a manufacturing process of the hollow profile to be produced is performed in real time is and the at least one process parameter is provided as at least one manipulated variable for a control and / or regulation of the manufacturing process to a control unit of the manufacturing process. In this way, important process parameters and profile properties can be measured simultaneously with production. This allows the process to be optimized in real time as the necessary information is available in the controller. The measured data can be used as a control value for a process-integrated control loop to optimize the process. In particular, the invention makes it possible to measure process parameters in the production of hollow profiles, such as a temperature (profile) on the inside of the profile, tolerances of the wall thicknesses and the profile of the fibers in the profile. In other words, it is possible to measure temperatures and temperature profiles within, for example, a pultrusion profile. Also, the wall thicknesses and the inner side distances of the hollow profiles can be measured. In addition, the nature of the internal surfaces of hollow profiles can be measured. It is also possible to measure the fiber progressions within the profile. It is thus possible by means of the method to perform a process-integrated measurement of production-related parameters, for example a pultrusion profile, with a tracking or stationary measuring probe according to the invention or a measuring device in real time.

Further preferred embodiments of the invention will become apparent from the remaining, mentioned in the dependent claims characteristics.

In a further preferred embodiment of the invention, it is provided that the at least one measuring device is arranged at least partially within the hollow profile to be produced and has at least one guide device, so that the measuring device is arranged at least partially movable and / or static within the hollow profile to be produced and wherein the at least one process parameter is continuously recorded by the control unit. Thus, process parameters within the hollow profile to be produced can be measured directly, so that a more accurate determination of the measurement results is made possible. When carrying along or in the static position of the measuring device, which may for example be a probe, respective process parameters can be measured over the entire process path. As a process route, for example, the distance from the tool via a pulling device to a cutting unit can be designated. If the measuring device or the probe is braked and remains statically in relation to the tool of the production process, the respective process parameter can be measured at one point of the process. For example, the effect of the respective process parameter in the tool can be measured directly at a specific point. By continuously recording the process parameters, the profile properties can be assigned to the respective process conditions during subsequent examinations, for example, and thus the technical properties of the profiles can be optimized. In other words, therefore, important process parameters and profile properties can be measured and recorded simultaneously with the production. This allows the process to be optimized in real time. Also, on the recorded data at a later date, for example, after performing a mechanical tensile test, the technical properties of the profiles produced can be compared with the respective process characteristics. It is thus possible to carry out a measurement and a recording of process-technical parameters as well as the profile properties of hollow profiles during production, for example in the pultrusion process. The measurement is simultaneous with the production. The measured and recorded data should be used as a manipulated variable for a process-integrated control or regulating system to optimize the process.

It is also provided in a further preferred embodiment of the invention that the proportionate within the hollow profile measuring device is arranged variable in length by means of a connection device on at least one tool component for producing the hollow profiles, wherein the tool component is also at least partially disposed within the hollow profile. The measuring device may for example be a probe and the tool component may for example be a mandrel of the tool. The measuring device can also be coupled or correspondingly fastened to the tool component via the connection device. The connection device can be designed such that for an arrangement or coupling or attachment corresponding components are present to ensure a reliable implementation of the concept. As a possible basic concept of the method, a probe is thus considered, which is fastened by a variable-length connection to the mandrel of the tool and is located within the profile during the production process, for example a pultrusion process. The Connecting device serves both for positioning of the measuring device or the probe within the profile, as well as for power supply and transmission of measurement data. To do this, the probe is attached to the end of the mandrel at the beginning of the process (or if measurements are not taken). After releasing the connection, the probe is carried by the friction on the profile inside profile. By braking the connection, the probe can be held at a fixed position relative to the tool. If braking does not take place, the probe remains in a static position relative to the profile and continues to move. Thus, it is thus possible to record a respective process parameter over the entire process path when carrying or in the static position of the probe relative to the profile. If the probe is braked and stays statically in relation to the tool, the current process parameter can be measured at one point of the process. For example, the effect of a process parameter in the tool can be measured directly at a specific point.

Furthermore, in a further preferred embodiment of the invention, it is provided that the at least one measuring device comprises at least one temperature sensor for grid measurement and / or at least one temperature sensor for point measurement. Depending on the requirements, different sensor types can be integrated into the respective probe. With the temperature sensor for grid measurement (or a grid measurement area), a temperature distribution on the inside of the profile to be produced can be measured. It is also possible to use a sensor with a larger temperature measuring range and higher resolution, but then measuring only in one point measuring range. In general, a temperature profile can thus be measured or recorded over the entire process path. For example, temperatures and temperature profiles can be measured within a pultrusion profile.

Furthermore, it is provided in a further preferred embodiment of the invention that the at least one measuring device comprises at least one measuring component for measuring a profile internal geometry of the hollow profile to be produced. Depending on the requirements, different sensors can also be used to measure the profile internal geometry. In the simplest embodiment, only a layer thickness gauge can be used. It is also conceivable that the measuring device comprises a laser distance sensor as a measuring component, so that a profile inner side distance can be measured. Such a laser distance sensor can be provided, for example, on the head side of the measuring device in the direction of movement or opposite from the connection device. But there are also other locations such a laser distance sensor conceivable. Also, the measuring component may be a spring element, which may be at least partially made of metal, for example. Such a metal spring element can likewise be arranged, for example, on a head side of the measuring device or the probe, wherein respective ends of the spring element are respectively brought into contact with an inner side of a hollow profile to be produced. For example, at least two ends or end regions of such a spring element or metal spring element can be provided. In general, the integration of such components or special probes allows a reliable geometric measurement to be performed in real time simultaneously with the process.

It is also provided in a further preferred embodiment of the invention that the at least one measuring device comprises at least one measuring system for measuring a fiber profile in the hollow profile to be produced. Thus, the fiber profile of the hollow profile to be produced can be reliably determined and recorded in real time.

It is provided in a further embodiment of the invention that the at least one measuring system at least one light and / or electromagnetic beam bar, which is designed to deliver pulsed or continuous steel, and at least one optical sensor device comprises. Thus, in a simple and reliable way, a measurement of the fiber flow is possible. The pulsed or continuous beams emitted by the beam bar are ultimately detected by the at least one optical sensor device in a possible end point of a beam path, so that a corresponding measurement over the fiber progression can be ensured here. In this case, the ray bar can be composed, for example, of different individual radiation elements, which, taken together, can then emit a corresponding bundled radiation.

It is also provided in a further embodiment of the invention that the at least one measuring system comprises at least one light and / or electromagnetic beam with at least one beam element, which is designed to deliver pulsed or continuous steels, and at least one optical sensor device, wherein the at least one optical sensor device is arranged outside of the hollow profile to be produced and is designed to detect radiating beams from the at least one beam bar. Thus, the profile to be produced by components of the measuring device from the inside For example, be continuously irradiated. With an optical image recognition can be recorded on the transmitted light from the outside of the fiber flow. So it is possible to measure with continuous irradiation and optical image recognition, so that a statement about the fiber flow in real time can be guaranteed. Also, the individual radiation elements or related radiation sources can be pulsed activated. Thus, measuring with pulsed radiation and optical image recognition is possible. In general, a reliable measurement of the fiber profile of the profile to be produced can thus be provided simultaneously in real time for production.

It is further provided in a further embodiment of the invention that the at least one measuring system at least one light and / or electromagnetic beam with at least one beam element, which is designed to deliver time-shifted sequentially from the at least one beam element pulsed or continuous steel, and at least one optical Sensor device comprises, wherein the at least one beam with the at least one beam element is optionally shielded by means of a shielding at least partially and wherein the at least one optical sensor device is movably disposed outside of the hollow profile to be produced and is designed to detect radiating beams from the at least one beam, wherein the detected beams are processed by means of a calculation device, so that at least information about the fiber profile of the hollow profile to be produced is generated. In this variant, for example, the individual radiation sources are activated one after the other. The optical detection then takes place by a movable sensor which positions itself above the source before each beam flash. Optionally, several sensors can also be positioned accordingly. Optionally, the area above the radiation source is shielded, so that only the coupled-in light in the vicinity of the radiation source is detected by the sensor. The individual images of the radiation source environment are then combined by a computing device or an integrated software in this device into an image. It is thus possible to measure with, for example, pulsed irradiation and optical image recognition. Alternatively, the measurement of the fiber path could take place with pulsed radiation and without image recognition. In this variant, the measurement can be performed from the outside or directly integrated in the probe. Here also pulsed beams are directed into the profile. Either fibers, for example glass fibers or generally a resin matrix, serve as light or radiation sensors which detect the radiation distribution in the profile cross section. From the information about which radiation source was pulsed and which radiation distribution was measured, the fiber profile within the profile can be calculated. If it is known which light transmittance has a profile at a fiber volume fraction of 0% and at a maximum proportion, the fiber volume content can be determined via the measured profile thickness and the light transmission at a specific location. It is therefore also possible to provide a measurement of the fiber volume content in real time by means of the presented method, wherein the variants presented already provide the necessary steps for this purpose.

Finally, it is provided in a further preferred embodiment of the invention that a measuring device for measuring at least one process parameter in the production of hollow profiles is provided, which is for the method according to claims 1 to 9 usable. The measuring device comprises at least one temperature sensor for grid measurement and / or at least one temperature sensor for point measurement and / or at least one measurement component for measuring a profile internal geometry of the hollow profile to be produced and / or at least one measuring system for measuring a fiber profile in the hollow profile to be produced and at least one connection device and at least one guide device. The aforementioned advantages also apply, if applicable, to the measuring device presented.

In general, the presented invention can be used for process-integrated quality control, for example of pultrusion profiles, but also for other hollow profiles. The start-up time of new processes can be reduced by the simultaneous measurement and feedback of information to a control loop. This leads to a higher production flexibility and increases the economic efficiency through a lower reject rate. For example, in the field of research, by continuously recording the process parameters, the profile properties can be assigned to the respective process conditions during later investigations and thus the technical properties of the profiles can be optimized.

The various embodiments of the invention mentioned in this application are, unless otherwise stated in the individual case, advantageously combinable with each other.

• 1 eine schematische Schnittansicht eines Pultrusionswerkzeugs in Betrieb im Sinne des vorgestellten Verfahrens;
• 2A eine perspektivische Skizze einer Messvorrichtung;
• 2B eine perspektivische Skizze einer weiteren Messvorrichtung;
• 3 eine schematische Schnittansicht einer Messvorrichtung innerhalb eines herzustellenden Hohlprofils;
• 4 eine perspektivische Skizze einer weiteren Messvorrichtung;
• 5 eine perspektivische Anwendungsskizze einer weiteren Messvorrichtung während des Herstellungsprozesses;
• 6 eine perspektivische Anwendungsskizze einer alternativen Messmethode während des Herstellungsprozesses.

The invention will be explained below in embodiments with reference to the accompanying drawings. Show it:

• 1 a schematic sectional view of a pultrusion tool in operation in the sense of the presented method;
• 2A a perspective sketch of a measuring device;
• 2 B a perspective sketch of another measuring device;
• 3 a schematic sectional view of a measuring device within a hollow profile to be produced;
• 4 a perspective sketch of another measuring device;
• 5 a perspective application sketch of another measuring device during the manufacturing process;
• 6 a perspective application sketch of an alternative measuring method during the manufacturing process.

1 shows a schematic sectional view of a pultrusion tool 10 in operation in the sense of the presented method. For producing a hollow profile 12 For example, the pultrusion tool 10 be used. For the purposes of the presented method, however, any alternative devices, not shown, for producing generally hollow sections are also suitable 12 conceivable. The pultrusion tool shown 10 has a tool component 14 on, with this tool component 14 For example, it can be a thorn. Relative to the image plane to the left of the mandrel is the feeder 16 to recognize from infiltrated fibers. The material is over the feeder 16 into the pultrusion tool 10 introduced, the tool component 14 in the form of a mandrel in accordance supporting a hollow profile to be produced 12 shaped. At the right edge region of the mandrel is a connection device 17 to recognize. About this connection device 17 is a measuring device 18 which may be a general probe, for example. The connection device 17 is in the 1 only generally represented by a dashed line. Conceivable here would be any concepts that a reliable arrangement of the measuring device 18 to the tool component 14 ensure, preferably a variable-length concept is preferred. In this way, the measuring device 18 its position within the hollow profile to be produced 12 change. Such a connection device 17 can allow a flexible and variable length connection of the probe to the mandrel. It is conceivable that the connection device 17 In this case, it comprises any components which have a variable-length and at the same time reversible positioning of the measuring device 18 within the hollow profile 12 enable. Also, the connection device 17 be designed both a power supply, as well as a transmission of measurement data to a control unit 20 to ensure. The control unit 20 is in the 1 only schematically shown and the connection to the measuring device 18 is in the 1 only shown schematically with a double block arrow. Such a control unit 20 can store and process recorded information among other things. It is thus shown that collected measurement data from the measuring device 18 to the control unit 20 or that a mutual interaction between the measuring device 18 and the control unit 20 consists.

2A shows a perspective sketch of a measuring device 18A , The measuring device 18A has a substantially cuboid shape, however, the shape can be adapted to the cross section of the profile to be produced. In each case a ray bar is on the respective longitudinal sides 22 and one temperature sensor each 24A to recognize. The respective ray bar 22 has a plurality of individual beam elements 26 on. The number of beam elements shown 26 is eleven, but may vary depending on the application. The individual beam elements 26 may be designed to emit either light or electromagnetic radiation. The respective beam bar shown 22 is thus shown only as an example and there are various forms and mixing concepts conceivable. In the 2A are the respective ray bars 22 It is shown on the respective long sides slightly angled with respect to a side edge. Even this approach diagonal course is to be understood only as an example. Other courses are conceivable. It is also conceivable that the number of beam bars 22 varies or that a respective ray bar 22 is provided at least partially interrupted. Relative to the image plane, a respective temperature sensor is in the respective rear region of the illustrated longitudinal sides 24A to recognize. The respective temperature sensor 24A has a rectangular basic shape, wherein in each case a recessed area 28 is provided, which in the interior of the measuring device 18 protrudes. Funnel-shaped thereby fall four substantially flat surfaces of a circumferential outer edge 30 of the temperature sensor 24A into the well area 28 off and hit on the lowest level on a rectangular surface 32 , which have a smaller circumference than the circumferential outer edge 30 of the temperature sensor 24A having. Referring again to the image plane is on the front face of the measuring device 18 a guiding device 34 to recognize. On the rear end is also a spring element 36 to recognize. The guiding device 34 has a substantially square body 38 on. The main body 38 is approximately centered on the front end of the measuring device 18 arranged. The connection or coupling can be chosen arbitrarily. For example, in a simple embodiment, this could be a material connection, so that these two geometries form a coherent component. It could also be a mechanical connection or an adhesive bond. On the respective side surfaces of the main body 38 is about a center each support element 40 to recognize, which in each case over a substantially round bar 42 on the body 38 is held. On the respective support element 40 is each a recording area 44 shown. In the respective recording areas 44 are each wheels 46 intended. The wheels 46 are doing so in the respective recording areas 44 held so that their respective treads an outer circumference of the measuring device 18 overtop. When the measuring device 18 ie in an inner region of a hollow profile to be produced 12 is guided, the treads of the wheels 46 along the inner walls, so that the measuring device 18 movable in the inner region of the hollow profile 12 can be provided. This is the orientation of the respective treads, as in the 2A Also shown, chosen so that the measuring device 18 forward and backward in the direction of the longitudinal sides movable in a hollow profile, not shown 12 could be moved. In other words, the measuring device could 18 be moved so that the guide device 34 front away in the direction of movement on the measuring device 18 is aligned or alternatively behind the measuring device 18 is moved. The main body 38 has grooves in relation to the image plane at the top and bottom 48 in which the upper and lower support elements 40 with the respective bars 42 being held. The main body 38 thus has on the front side on an H-shaped base. At the respective side surfaces of the main body 38 become the carrier elements 40 each by means of the rods 42 held in the side surfaces according to a plug-in system. Alternatively, a kind of screw system would be conceivable, in which case in the main body 38 appropriate recordings are provided with matching threads. These two presented connection concepts of the support elements 40 are only an example. The wheels 46 be doing on the support elements 40 by means of respective retaining elements 50 held. The holding elements 50 can be for example screws, rivets or pins. The connection can be fixed or detachable. It is also conceivable that the shooting areas 44 rotatable on the bars 42 are stored, so some leeway in the orientation of the wheels 46 given is. This can be especially the case of the first meters of the hollow profile to be produced 12 be advantageous, since thus possibly occurring irregularities on the inside of the hollow profile 12 can be compensated. The spring element 36 on the rear end overhangs the outer circumference of the measuring device 18 and provides a slightly curved, substantially planar body, which in the shown 2A is divided into three components, dar. The spring element 36 is in the 2A only partially visible and also has a substantially C-shaped form, wherein the upper and lower portions of an outer periphery of the measuring device 18 overhang on the respective longitudinal side. In the end regions of the curved course is shown flattened, so that the spring element 36 if it is in the inner area of a hollow section 12 would be with these flattened areas on respective inner walls of the hollow profile 12 would come across. The spring element 36 is in the 2A , as already mentioned, provided in three parts, wherein the individual components are each aligned the same and so far together also represent said body. It is conceivable that the three components in a connecting region, not shown, to the measuring device 18 are merged and then again provided on the opposite side as a three-part system. The number of individual components is only an example. The uniform shape is to be understood only as an example.

2 B shows a perspective sketch of another measuring device 18B , The measuring device 18B also has a substantially cuboidal shape, which in turn is to be understood as an example and can be adapted to the respective cross section of the profile to be produced. In each case a ray bar is on the respective longitudinal sides 22 and one temperature sensor each 24B to recognize. The respective ray bar 22 has a plurality of individual beam elements 26 on. The number of beam elements shown 26 is eleven, but may vary depending on the application. The individual beam elements 26 may be designed to emit either light or electromagnetic radiation. The respective beam bar shown 22 is thus shown only as an example and there are various forms and mixing concepts conceivable. In the 2 B are the respective ray bars 22 It is slightly angled on the respective longitudinal side with respect to a side edge. Even this approach diagonal course is to be understood only as an example. Other courses are conceivable. It is also conceivable that the number of beam bars 22 varies or that a respective beam bar is provided at least partially interrupted. Relative to the image plane, a respective temperature sensor is in the respective rear region of the illustrated longitudinal sides 24B to recognize. The respective temperature sensors 24B have a substantially circular geometry, the respective temperature sensors 24B from an outer surface of the measuring device 18 protrude. Relative to the image plane is the temperature sensor 24B shown on the upper longitudinal side in the middle in the rear edge area. The temperature sensor 24B , which is shown on the lateral longitudinal side, however, is located centrally relative to the entire lateral longitudinal surface of the measuring device 18 , Both temperature sensors 24B each have an outer ring element 39 on. Referring again to the picture plane is also in the 2 B on the front end of the measuring device 18 a guiding device 34 to recognize and also on the rear face is also a spring element 36 to recognize. The guiding device 34 and the spring element 36 are essentially identical to the guide device 34 and the spring element 36 from 2A , Only the wheels 46 are shown a bit wider and the shooting areas 44 the support elements 40 vary. The spring element 36 is formed in one piece in this exemplary representation. Unlike in 2A shown has the guide device 34 on the front side a connection element 52 on. This connection element 52 has a plate-shaped body with a substantially rectangular shape and is with corresponding counterparts on the grooves 48 placed on top so that it is essentially flush on the body 38 is held. The connection element 52 has on the front side also centrally a substantially round patch collar 53 on, with the collar 53 has a circular opening in the middle. By means of the connection element 52 For example, via a connection device, not shown 17 the measuring device 18 with a tool component 14 get connected.

3 shows a schematic sectional view of a measuring device 18 within a hollow profile to be produced 12 , The measuring device 18 may be, for example, a probe. An arrow shows the direction of movement of the measuring device 18 inside the hollow profile 12 on. Relative to the image plane, the measuring device 18 on the right side a laser distance sensor 54 on, with the laser distance sensor 54 radiate 56 in the direction of the inner walls of the hollow profile 12 sending out. Outside the hollow profile 12 is a coating thickness gauge 58 to recognize. The coating thickness gauge 58 may be, for example, a device from the company Salutron. The laser distance sensor 54 may be, for example, a device from Automation24. The coating thickness gauge 58 and the laser distance sensor 54 can as advanced components of the respective measuring devices 18 . 18A . 18B be viewed and are in this 3 shown only as an example. Accordingly, other expansion components could be provided, which alternatively provide comparable technical possibilities. Furthermore, based on the direction of movement in the head region, the spring element 36 to recognize, wherein the spring element 36 in the 3 is shown in two parts pronounced, so that an upper spring element 36 the upper inner wall of the hollow profile 12 touched and the lower spring element 36 the lower inner wall of the hollow profile 12 touched.

4 shows a perspective sketch of another measuring device 18 which is substantially identical to the measuring device 18 from 2A is. In particular, the guide device 34 and the spring element 36 are with those of 2A identical. Unlike the 2A are the respective ray bars 22 on the long sides of the measuring device 18 each parallel to an outer edge of the measuring device 18 arranged. In addition, the respective beam bars 22 in the outermost region of the respective longitudinal sides of the measuring device 18 adjacent to the guide device 34 arranged. The ray bars 22 For example, each one LED bar with nine radiation elements 26 his. The number of beam elements 26 is shown here only as an example. The thus remaining space on the respective longitudinal side is almost entirely of two optical sensors 60 filled. The structure of the optical sensors 60 is similar to the structure of the temperature sensor 24A from 2A ,

5 shows a perspective application sketch of another measuring device 18 during the manufacturing process. The measuring device 18 is below a section of a pultrusion profile 62 shown. In the section of the pultrusion profile shown 62 is schematically and exemplarily a variety of fibers 64 shown. On the measuring device 18 is a ray bar 22 to recognize which individual ray elements 26 having. The six beam elements 26 are shown as examples only. There could be other forms of radiation elements 26 be provided and the number can be varied depending on the application. Above the pultrusion profile 62 is schematically an optical sensor 66 shown, so that emitted rays (not shown) from the beam elements 26 which the pultrusion profile 62 happened from the optical sensor 66 can be detected. Moreover, in 5 a calculation device 67 to recognize, with a double block arrow indicates a corresponding connection.

6 shows a perspective application sketch of an alternative measuring method during the manufacturing process. Here is the measuring device 18 below a section of a pultrusion profile 62 shown. From the only slightly recognizable ray bar 22 be from the individual beam elements 26 For example, LED flashes emitted in such a way so that rays in the fibers 64 be initiated. This can, for example, in a Einkopplungsbereich 68 be done. In a measuring range 69 , in which, for example, an area with the highest radiation intensity 70 prevails, can then according to the measuring device 18 be measured. This is the measuring range 69 for example, spaced from the area in which the beam bar 22 is provided.

LIST OF REFERENCE NUMBERS

10

pultrusion

12

hollow body

14

tool component

16

feed

17

access device

18

measuring device

18A

measuring device

18B

measuring device

20

control unit

22

radiation bar

24A

temperature sensor

24B

temperature sensor

26

rays element

28

depression area

30

outer edge

32

rectangular area

34

guiding device

36

spring element

38

body

39

ring element

40

support element

42

rods

44

reception area

46

bikes

48

groove

50

retaining element

52

connecting element

53

collar

54

Laser Distance Sensor

56

beam

58

Coating Thickness Gauge

60

optical sensor

62

pultrusion

64

fiber

66

optical sensor

67

calculator

68

coupling-

69

measuring range

70

ray intensity

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19805584 A1 [0003]
• DE 102007059865 A1 [0004]
• DE 102014200955 A1 [0005]

Claims (10)

Method for measuring at least one process parameter and / or at least one quality characteristic of the profile to be produced in the production of hollow profiles (12), comprising the following steps: providing at least one measuring device (18), measuring the at least one process parameter and / or at least one quality characteristic of the profile to be produced by means of the at least one measuring device (18), characterized in that the measuring of the at least one process parameter during a manufacturing process of the hollow profile (12) to be produced is performed in real time and the at least one process parameter as at least one manipulated variable for a controller and / or Control of the manufacturing process to a control unit (20) of the manufacturing process is provided. Method according to Claim 1 wherein the at least one measuring device (18) is arranged at least partially within the hollow profile (12) to be produced and has at least one guide device (34) so that the measuring device (18) is arranged to be movable and / or static at least partially within the hollow profile (12) to be produced and wherein the at least one process parameter is continuously recorded by means of the control unit (20). Method according to one of the preceding claims, wherein the within the hollow profile (12) proportionate measuring device (18) variable in length by means of a connection device (17) on at least one tool component (14) for producing the hollow profiles (12) is arranged, wherein the tool component (14) is also at least partially disposed within the hollow profile (12). Method according to one of the preceding claims, wherein the at least one measuring device (18) comprises at least one temperature sensor (24A) for grid measurement and / or at least one temperature sensor (24B) for point measurement. Method according to one of the preceding claims, wherein the at least one measuring device (18) comprises at least one measuring component for measuring a profile internal geometry of the hollow profile (12) to be produced. Method according to one of the preceding claims, wherein the at least one measuring device (18) comprises at least one measuring system for measuring a fiber flow in the hollow profile (12) to be produced. Method according to Claim 6 wherein the at least one measuring system comprises at least one light and / or electromagnetic radiation strip (22) which is designed to deliver pulsed or continuous steel (56) and at least one optical sensor device (60). Method according to Claim 6 wherein the at least one measuring system comprises at least one light and / or electromagnetic radiation strip (22) with at least one beam element (26) which is designed to emit pulsed or continuous steels (56) and at least one optical sensor device (60) the at least one optical sensor device (60) is arranged outside the hollow profile (12) to be produced and is designed to detect radiating beams (56) from the at least one radiation strip (22). Method according to Claim 6 wherein the at least one measuring system comprises at least one light and / or electromagnetic radiation strip (22) with at least one beam element (26) which is designed to deliver, in a time-delayed manner, pulsed or continuous steels (56) from the at least one beam element (26), and at least one optical sensor device (60), wherein the at least one beam strip (22) is at least partially shieldable with the at least one beam element (26) and at least one optical sensor device (60) is movable outside the hollow profile (12 ) and is designed to detect radiating beams (56) from the at least one beam (22), wherein the detected beams (56) are processed by a computing device (67), so that at least one information about the fiber profile of the hollow profile ( 12) is generated. Measuring device (18) for measuring at least one process parameter in the production of hollow profiles (12), which is suitable for the method according to the Claims 1 to 9 is usable, wherein the measuring device (18) at least one temperature sensor (24A) for grid measurement and / or at least one temperature sensor (24B) for point measurement and / or at least one measurement component for measuring a profile internal geometry of the hollow profile (12) and / or at least one measuring system for measuring a fiber profile in the hollow profile (12) to be produced and at least one connection device (52) and at least one guide device (34).

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