CN110672221A - Metal weldment temperature field detection system and temperature detection method thereof - Google Patents
Metal weldment temperature field detection system and temperature detection method thereof Download PDFInfo
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- CN110672221A CN110672221A CN201911003767.9A CN201911003767A CN110672221A CN 110672221 A CN110672221 A CN 110672221A CN 201911003767 A CN201911003767 A CN 201911003767A CN 110672221 A CN110672221 A CN 110672221A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/04—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples the object to be measured not forming one of the thermoelectric materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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Abstract
The invention discloses a metal weldment temperature field detection system which comprises a temperature measuring hole positioning device plate, a thermocouple, a positioning and clamping device, two paperless recorders and a computer, wherein three sliding chutes are processed on the temperature measuring hole positioning device plate to form three adjustable clamping structures; the temperature measuring device comprises a temperature measuring hole positioning device plate, a longitudinal temperature measuring hole and two paperless recording instruments, wherein a transverse clamping structure is installed in a chute on one side of the temperature measuring hole positioning device plate, a longitudinal clamping structure is installed in two chutes on the other two adjacent sides of the temperature measuring hole positioning device plate, a locking pliers is additionally installed in the thickness direction of the temperature measuring hole positioning device plate, a plurality of transverse temperature measuring holes and a plurality of longitudinal temperature measuring holes are formed in the temperature measuring hole positioning device plate, a thermocouple is installed in each transverse temperature measuring hole and each longitudinal temperature measuring hole, the thermocouples are respectively connected with the two paperless recording instruments through temperature compensation lines, the two paperless recording instruments are electrically connected with a computer, and temperature data acquired by the paperless recording instruments in real time are led. The system can monitor the temperature field of the welding part in real time.
Description
Technical Field
The invention belongs to the field of metal welding temperature testing, and particularly relates to a metal weldment temperature field detection system in a welding process.
Background
With the rapid development of the world manufacturing industry, the welding technology level is higher and higher, and the requirement on the welding quality is stricter and stricter. On the premise of ensuring the mechanical property and the safe use property, the welding wire also needs to ensure the sufficient excellent property in different environments and different occasions, which requires that each welding product needs to be subjected to strict quality inspection.
The welding temperature is an important parameter in a welding experiment and is very important to influence the welding seam quality. The control of the welding temperature is mostly implemented by field operators according to experience, and timely and accurate adjustment in one step is difficult to achieve. The welding temperature is too high, the welding seam is easy to be over-burnt, and a perforation is formed; the welding temperature is too low, so that the welding seam is easy to be burnt to be incomplete, incomplete welding is formed, the quality of the welding seam is influenced, defective products are generated, the production efficiency of products is influenced, and raw materials are wasted.
With the popularization and continuous improvement of computer technology, the functions and the calculation accuracy of the CAE system are greatly improved, and various CAE systems based on product digital modeling are produced. At present, software such as ANSYS, MSC and the like can perform multi-physical field coupling operation, simulation is performed on the welding process, and the CAE result can also generate visual graphic output through CAD technology, such as a contour map for generating a displacement map, stress, temperature and pressure distribution, and a color light and shade map for representing the stress, temperature and pressure distribution. It is very important to verify whether the welding temperature distribution cloud chart is consistent with the actual welding temperature.
Disclosure of Invention
The invention aims to solve the problem and provides a metal weldment temperature field detection system which can monitor the temperature field of a weldment in real time and guide temperature measurement data into a computer 1 in real time through a paperless recorder 2 to be converted into a distribution curve chart for comparison and analysis. The real temperature change condition in welding is directly measured.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a metal weldment temperature field detecting system, includes temperature measurement hole positioner plate 3, thermocouple 6, location clamping device, computer 1, two no paper record appearance 2, its characterized in that: three chutes 7 are processed on a temperature measuring hole positioning device plate 3, a longitudinal clamping structure 4 is installed in a chute on one side of the temperature measuring hole positioning device plate 3, a transverse clamping structure 5 is installed in two chutes on the other two adjacent sides of the temperature measuring hole positioning device plate 3, locking pliers are additionally installed on the temperature measuring hole positioning device plate, a plurality of transverse temperature measuring holes and a plurality of longitudinal temperature measuring holes are formed in the temperature measuring hole positioning device plate 3, thermocouples 6 are installed in the transverse temperature measuring holes and the longitudinal temperature measuring holes, the thermocouples 6 and two paperless recorders are respectively and electrically connected through temperature compensation lines, the two paperless recorders are connected with a computer, and temperature data acquired by the paperless recorders in real time are led into the computer to form a real-time temperature change curve.
Preferably, there are 4 transverse temperature measuring holes, and the distance between two adjacent transverse temperature measuring holes is equal to 50 mm.
Preferably, the number of the longitudinal temperature measuring holes is 4, and the distance between every two adjacent longitudinal temperature measuring holes is 10mm, 15mm and 20mm in sequence.
Preferably, the thermocouple 6 is a detachable contact thermocouple.
Preferably, the transverse clamping structure 5 is formed by connecting a transverse telescopic rod to each of two ends of a clamping plate, and the longitudinal clamping structure 4 is formed by connecting a longitudinal telescopic rod to each of two ends of a longitudinal clamping plate.
Preferably, the transverse telescopic rod and the longitudinal telescopic rod are fixed and limited through locking nuts 8 fixed at the bottoms of the temperature measuring and positioning device plates.
Preferably, the paperless recorder 2 is a color screen paperless recorder.
A temperature detection method of a metal weldment temperature field detection system comprises the following steps of 1) selecting and installing a thermocouple, firstly selecting a used thermocouple 6 according to the material of a weldment to be welded, and inserting the selected thermocouple into a temperature measuring hole on a temperature measuring hole positioning device plate 3;
2) fixing the welding part and the temperature measuring hole positioning device plate 3, adjusting a transverse telescopic rod of the transverse clamping structure 5 in the welding line direction to a proper position, and fixing the transverse telescopic rod through a locking nut 8; fixing the welding part and the temperature measuring hole positioning device plate 3 by adopting a pair of locking pliers in the thickness direction; for the longitudinal telescopic rod of the longitudinal clamping structure 4 vertical to the welding direction, the longitudinal telescopic rod is fixed through a locking nut 8;
3) the circuit connection, after fixing the temperature measuring hole positioning device plate 3 and the welding part, the thermocouple 6 is connected with the data interface of the paperless recorder 2 by using a temperature compensation line, and the paperless recorder 2 is connected with the computer 1 by a data transmission line; after the welding part is added on the positioning device plate of the temperature hole to be measured, setting the welding parameters of the electric welding machine for welding operation;
4) temperature measurement data is used for drawing a temperature change curve, the temperature field temperature change of a welding part is monitored in real time through the paperless recorder 2 in the welding process, the temperature measurement data is led into the computer 1 in real time through the paperless recorder 2, and after the temperature measurement data is transmitted to the computer 1, the temperature measurement data is led into Origin drawing software for drawing the temperature change curve; and storing the temperature change curve graph, and then comparing and analyzing the graph with the temperature change curve obtained by the CAE analysis software to determine the simulation result of the CAE analysis software.
Compared with the prior art, the invention has the beneficial effects that:
the system for monitoring the temperature field of the weldment in the welding process can directly measure the real temperature change conditions of the weldment in different parts of a weld joint area and a heat affected area in the welding process, is used for predicting the change conditions of microstructures and performance of the weldment, and can verify the inosculation of the temperature field obtained by CAE analysis software simulation welding analysis. The method can monitor the temperature field of the welding part in real time, and temperature measurement data is led into the computer 1 in real time through the paperless recorder 2. The temperature measurement data can be imported into Origin drawing software to draw a temperature change curve. The temperature change trend of the welding parts can be clearly seen, and the temperature change curve graph is stored and then compared with the temperature change curve obtained by CAE analysis software, so that the reliability of the simulation result of the CAE software is determined.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a block diagram of a metal welding temperature field detection system according to the present invention.
FIG. 2 is a schematic three-dimensional assembly diagram of a temperature measuring hole positioning device of the metal welding temperature field detection system of the present invention.
FIG. 3 is a front view of the layout of temperature measuring holes of the metal welding temperature field detecting system of the present invention.
FIG. 4 is a side view of the layout of temperature measuring holes of the metal welding temperature field detecting system of the present invention.
FIG. 5 is a top view of the layout of temperature measuring holes of the metal welding temperature field detecting system of the present invention.
FIG. 6 is a front view of the longitudinal telescoping rod of the metal welding temperature field detection system of the present invention.
FIG. 7 is a side view of the longitudinal telescoping rod of the metal welding temperature field detection system of the present invention.
FIG. 8 is a top view of the longitudinal telescoping rod of the metal welding temperature field detection system of the present invention.
FIG. 9 is a front view of the transverse telescoping rod of the metal welding temperature field detection system of the present invention.
FIG. 10 is a side view of the lateral telescoping rod of the metal welding temperature field detection system of the present invention.
FIG. 11 is a top view of the lateral telescoping rod of the metal welding temperature field detection system of the present invention.
FIG. 12 is a diagram of a temperature variation curve of the metal welding temperature field detection system of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1-11, a metal weldment temperature field detection system comprises a temperature measuring hole positioning device plate 3, a thermocouple 6, a positioning and clamping device, two paperless recorders 2 and a computer 1, wherein three sliding chutes 7 are processed on the temperature measuring hole positioning device plate to form three adjustable clamping structures; the temperature measuring device comprises a temperature measuring hole positioning device plate 3, and is characterized in that a longitudinal clamping structure 4 is installed in a chute on one side of the temperature measuring hole positioning device plate 3, a transverse clamping structure 5 is installed in two chutes on the other two adjacent sides of the temperature measuring hole positioning device plate 3, a locking pliers (not shown in the drawing) is additionally installed on the temperature measuring hole positioning device plate, a plurality of transverse temperature measuring holes and a plurality of longitudinal temperature measuring holes are formed in the temperature measuring hole positioning device plate 3, a thermocouple 6 is installed in each transverse temperature measuring hole along the direction of a welding seam, a thermocouple 6 is installed in each longitudinal temperature measuring hole perpendicular to the welding direction, the thermocouple 6 and two paperless recording instruments are electrically connected through temperature compensation lines respectively, each paperless recording instrument is provided with 4 passage ports, and the temperature compensation lines are connected to the passage ports once according to numbers to ensure that the temperature. The two paperless recorders are connected with a computer, and temperature data of the paperless recorders are led into the computer in real time to form a real-time temperature change curve, so that the real-time temperature change curve is converted into a digital signal which is visual and convenient to analyze.
In order to enable the thermocouple for measuring temperature to be in better contact with a welding part, three sliding grooves are processed on a temperature measuring hole device plate to form three adjustable clamping structures for limiting displacement in the length direction and the width direction, and the clamping structures are fixed and limited through a locking nut. In addition, the temperature measurement detection system is adjusted in the thickness direction through a locking pliers so as to adapt to welded plates with different thicknesses. The using quantity of the locking pliers is freely selected according to the size of the welding plate, in order to not influence the welding, the locking pliers are arranged on the two sides of the welding plate as far as possible, the transverse adjustable distance is 200mm-290mm, and the longitudinal adjustable distance is 60mm-95 mm.
As shown in fig. 2-5, the transverse temperature measuring holes and the longitudinal temperature measuring holes are arranged on a plate and arranged in a T shape. The transverse direction is the direction of the welding seam, and the actual temperature change of all parts of the welding seam in the welding process can be measured; the longitudinal direction is perpendicular to the welding direction, and can reflect the temperature change condition of the non-welding seam (different positions of a heat affected zone) of the welding part. The number of the transverse temperature measuring holes is 4, the distance between every two adjacent transverse temperature measuring holes is 50mm, the number of the longitudinal temperature measuring holes is 4, the distance between every two adjacent longitudinal temperature measuring holes is 10mm, 15mm and 20mm in sequence, a certain gradient is formed, and the temperature change difference of different positions of a heat affected zone can be monitored.
As shown in fig. 6-11, the transverse clamping structure 5 is formed by connecting a transverse telescopic rod to each end of a transverse clamping plate, and the longitudinal clamping structure 4 is formed by connecting a longitudinal telescopic rod to each end of a transverse clamping plate. The transverse telescopic rod and the longitudinal telescopic rod are fixed and limited through a locking nut 8 fixed at the bottom of the temperature measuring and positioning device plate.
In order to solve the problem that the test temperature deviation of the infrared temperature detector is large, the thermocouple 6 is a detachable contact type thermocouple and is arranged in a temperature measuring hole, and a proper thermocouple can be selected and used for installation according to the type of the measured metal or different temperature interval ranges.
And the paperless recorder 2 adopts a color screen paperless recorder to collect temperature data in real time. The instrument is in a model of VPR130-RG, takes a 32-bit embedded CPU as a core, and is assisted by a large-scale integrated circuit, a large-capacity FLASH memory, signal intelligent conditioning and a high-resolution image liquid crystal screen. The instrument supports data reading, data setting and data recording of the USB mobile memory, has a power-off protection function, and can realize remote monitoring. The recorder can be used with a thermocouple of B, E, J, K, S, T, F2 or other types.
As shown in fig. 12, two four-channel paperless recorders are simultaneously provided in the present invention, one four-channel recorder records four temperature measurement points in the welding direction, and the other four-channel recorder records four temperature measurement points perpendicular to the welding direction. The thermocouple and the paperless recorder are connected through a temperature compensation line, and the temperature is ensured to be transmitted into the recorder. The paperless recorder is connected with the computer, temperature data of the paperless recorder is led into the computer in real time, a real-time temperature change curve is formed, and the temperature change curve is converted into a digital signal which is visual and convenient to analyze.
An embodiment of the present invention will now be described in detail with reference to fig. 1 as follows:
a temperature detection method of a metal weldment temperature field detection system comprises the following steps of 1) selecting and installing a thermocouple, firstly determining the variety of the used thermocouple 6 according to the material of a material to be welded, and inserting the selected thermocouple into a temperature measuring hole on a temperature measuring hole positioning device plate 3;
selecting one plate of the welded part to be additionally provided with a temperature measuring device, and arranging a temperature measuring thermocouple for testing the direction of a welding seam at the welding seam to be tightly contacted with the upper surface of the welded part; after the temperature measuring point in the welding seam direction is determined, the temperature measuring point in the direction perpendicular to the welding seam is also determined, and the temperature measuring point is also kept in close contact with a welding part to ensure that the temperature measuring error is within an allowable range.
2) The welding part and the temperature measuring device are fixed, the clamping device in the welding line direction is adjusted to a proper position through the transverse telescopic rod 5, and the welding part and the temperature measuring device are fixed through the locking nut mechanism; fixing the welding part and the temperature measuring device in the thickness direction by adopting a locking pliers; for the longitudinal telescopic rod 4 of the clamping device vertical to the welding direction, the longitudinal telescopic rod is fixed through a locking nut mechanism, and the fixing method of the longitudinal telescopic rod is the same as that of the clamping device in the welding line direction;
3) the circuit connection, after fixing the temperature measuring device and the welding part, the thermocouple 6 is connected with the data receiving port of the paperless recorder 2 by using a temperature compensation wire, and the paperless recorder is connected with the computer 1 by a data transmission line; after the device to be measured is installed, the welding parameters of the electric welding machine are set, and then the welding operation can be carried out.
The welding part temperature field monitoring system monitors the temperature change of the temperature field of the welding part in real time through the paperless recorder in the welding process, temperature measurement data are led into the computer 1 in real time through the paperless recorder 2, and after the temperature measurement data are transmitted to the computer 1, the temperature measurement data are led into Origin drawing software to draw a temperature change curve; the temperature change trend of the welding part is clearly seen through the temperature change curve, and the temperature change curve graph is stored and then compared with the temperature change curve obtained by CAE analysis software to determine the reliability of the CAE software simulation result.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides a metal weldment temperature field detecting system, includes temperature measurement hole positioner board (3), thermocouple (6), location clamping device, computer (1), two no paper record appearance (2), its characterized in that: three sliding grooves (7) are processed on the temperature measuring hole positioning device plate (3); the temperature measurement device comprises a temperature measurement hole positioning device plate (3), and is characterized in that a longitudinal clamping structure (4) is installed in a chute on one side of the temperature measurement hole positioning device plate (3), a transverse clamping structure (5) is installed in each chute on the other two adjacent sides of the temperature measurement hole positioning device plate (3), a locking pliers is additionally installed on the temperature measurement hole positioning device plate (3), a plurality of transverse temperature measurement holes and a plurality of longitudinal temperature measurement holes are formed in the temperature measurement hole positioning device plate (3), a thermocouple (6) is installed in each transverse temperature measurement hole and each longitudinal temperature measurement hole, the thermocouple (6) and two paperless recorders (2) are electrically connected through temperature compensation lines, the two paperless recorders are connected with a computer, and temperature measurement data acquired in real time are guided into the computer by the paperless recorders to form a temperature real-time change curve.
2. The system for detecting the temperature field of the metal weldment according to claim 1, wherein the number of the transverse temperature measuring holes is 4, and the distance between every two adjacent transverse temperature measuring holes is equal.
3. The system for detecting the temperature field of the metal weldment according to claim 1, wherein the number of the longitudinal temperature measuring holes is 4, and the distance between every two adjacent longitudinal temperature measuring holes is 10mm, 15mm and 20mm in sequence.
4. The metal weldment temperature field sensing system of claim 1, wherein the thermocouples are removable contact thermocouples.
5. The metal weldment temperature field detection system of claim 1 wherein the transverse clamping structure (5) is comprised of a transverse clamping plate having a transverse telescoping rod attached to each end of the transverse clamping plate and the longitudinal clamping structure (4) is comprised of a longitudinal clamping plate having a longitudinal telescoping rod attached to each end of the longitudinal clamping plate.
6. The metal weldment temperature field detection system of claim 5 wherein the transverse and longitudinal telescoping rods are both fixed and limited by locking nuts (8) at the bottom of the temperature measurement locating device plate.
7. The metal weldment temperature field detection system of claim 1, wherein the paperless recorder (2) is a color screen paperless recorder.
8. The temperature detection method of the metal weldment temperature field detection system according to claim 1, characterized by the steps of, 1) selecting and installing a thermocouple, firstly selecting the thermocouple (6) to be used according to the material of the weldment to be welded, and inserting the selected thermocouple into a temperature measuring hole on a temperature measuring hole positioning device plate (3);
2) fixing a welding part and a temperature measuring hole positioning device plate (3), adjusting a transverse telescopic rod of a transverse clamping structure (5) in the welding line direction to a proper position, and fixing the transverse telescopic rod through a locking nut (8); fixing the welding part and the temperature measuring hole positioning device plate by adopting a pair of locking pliers in the thickness direction; for a longitudinal telescopic rod of the longitudinal clamping structure (4) vertical to the welding direction, the longitudinal telescopic rod is fixed through a locking nut (8);
3) the circuit connection is realized, after the temperature measuring hole positioning device plate and the welding part are fixed, the thermocouple (6) is connected with a data interface of the paperless recorder (2) by using a temperature compensation wire, and the paperless recorder (2) is connected with the computer (1) through a data transmission line; after the welding part is added on the positioning device plate of the temperature hole to be measured, setting the welding parameters of the electric welding machine for welding operation;
4) temperature measurement data is used for drawing a temperature change curve, the temperature field temperature change of a welding part is monitored in real time through the paperless recorder (2) in the welding process, the temperature measurement data is led into the computer (1) in real time through the paperless recorder (2), and after the temperature measurement data is transmitted to the computer (1), the temperature measurement data is led into Origin drawing software for drawing the temperature change curve; and storing the temperature change curve graph, and then comparing and analyzing the graph with the temperature change curve obtained by the CAE analysis software to determine the simulation result of the CAE analysis software.
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