System for monitoring the state of a welded joint between a ceramic and a metal part and method for controlling it

Abstract

The application discloses a welding state monitoring system of ceramic and metal parts and a control method thereof, and belongs to the technical field of welding monitoring. The system comprises: a to-be-tested part; a detection device configured to detect welding parameters of corresponding welds in the process of welding a ceramic brazing part and a first metal thin-walled part, and the ceramic brazing part and a second metal thin-walled part, the welds are all arranged around the to-be-tested part, and a brazing seam is formed on the side of the to-be-tested part away from the welds; a controller electrically connected with the detection device, configured to calculate a thermal stress value according to a welding deformation amount and a welding area temperature, and the controller judges the welding state of the to-be-tested part through the welding parameters and the thermal stress value; a display electrically connected with the controller, used for displaying the welding state; wherein the detection device comprises a ray detector, and the ray detector is configured to perform ray detection on the brazing seam when the thermal stress value is not less than a warning value. The application can judge the influence of the welding process on the brazing seam, and is helpful to reduce the failure risk of the brazing seam.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding monitoring, and particularly relates to a welding state monitoring system for ceramic and metal parts and a control method thereof. BACKGROUND

[0002] In the related art, the ceramic workpiece and the metal workpiece often need to be welded through brazing, and after brazing, the ceramic brazing piece and the metal thin-walled piece often need to be welded again. However, the brazing seam quality of the ceramic brazing piece is affected by the welding temperature, the welding strain and the stress value of the subsequent welding area, and failure is prone to occur in the subsequent welding process, so there is room for improvement. SUMMARY

[0003] The application aims to at least solve one of the technical problems in the related art. To this end, the application provides a welding state monitoring system for ceramic and metal parts and a control method thereof, which helps to reduce the failure risk of the brazing seam in other welding processes.

[0004] In a first aspect, the application provides a welding state monitoring system for ceramic and metal parts, comprising:

[0005] a to-be-measured piece, comprising a ceramic brazing piece, a first metal thin-walled piece and a second metal thin-walled piece;

[0006] a detection device configured to detect welding parameters of corresponding weld seams in the process of welding the ceramic brazing piece and the first metal thin-walled piece, and the ceramic brazing piece and the second metal thin-walled piece, the welding parameters comprising a welding deformation and a welding area temperature, the weld seams are arranged around the to-be-measured piece, and the side of the to-be-measured piece away from the weld seams forms a brazing seam;

[0007] a controller electrically connected with the detection device, configured to calculate a thermal stress value according to the welding deformation and the welding area temperature, and the controller judges the welding state of the to-be-measured piece through the welding parameters and the thermal stress value;

[0008] a display electrically connected with the controller, used to display the welding state;

[0009] The detection device comprises a radiation detector, and the radiation detector is configured to perform radiation detection on the brazing seam when the thermal stress value is not less than a warning value.

[0010] In the above technical solution, the application monitors the welding parameters of the weld seam in real time during the welding process, and obtains the thermal stress value by processing the welding parameters, and then compares the real-time data with the allowable value of the brazing seam, so as to judge the influence of the welding process on the brazing seam, which helps to reduce the failure risk of the brazing seam.

[0011] According to one embodiment of the present application, the detection device further comprises an infrared thermometer for detecting the temperature of the welding area and a plurality of strain gauges for detecting the welding deformation, and the plurality of strain gauges are arranged on the side of the workpiece where the weld is formed and are distributed on both sides of the weld along the first direction.

[0012] According to one embodiment of the present application, the plurality of strain gauges on the same side of the weld are arranged around the weld, and the strain gauges are provided with sensors on the side away from the workpiece.

[0013] According to one embodiment of the present application, the ceramic brazing piece forms a first brazing seam and a second brazing seam arranged around, and the first brazing seam and the second brazing seam are respectively located at the two ends of the ceramic brazing piece along the first direction.

[0014] The first metal thin-walled piece is welded to one end of the ceramic brazing piece forming the first brazing seam, forming a first weld seam arranged around, and the first weld seam is located on the side of the ceramic brazing piece away from the first brazing seam.

[0015] The second metal thin-walled piece is welded to one end of the ceramic brazing piece forming the second brazing seam, forming a second weld seam arranged around, and the second weld seam is located on the side of the ceramic brazing piece away from the second brazing seam.

[0016] Wherein, the projections of the first weld seam and the second weld seam along the first direction are spaced apart in the horizontal direction, and the projections of the first brazing seam and the second brazing seam along the first direction are spaced apart in the horizontal direction.

[0017] According to one embodiment of the present application, the ceramic brazing piece comprises a ceramic piece, a first metal piece and a second metal piece, the first metal piece and the second metal piece are respectively connected to the two ends of the ceramic piece along the first direction, and the ceramic piece and the first metal piece form the first brazing seam, and the ceramic piece and the second metal piece form the second brazing seam.

[0018] According to one embodiment of the present application, the welding state monitoring system of ceramic and metal components further comprises a welding fixing tool, and the workpiece is installed on the welding fixing tool, and the weld is located on the side of the workpiece away from the welding fixing tool.

[0019] According to one embodiment of the present application, the controller comprises a data acquisition module, a data communication module and a data processing module, the data acquisition module is electrically connected with the detection device, the data communication module is electrically connected with the data acquisition module, the data processing module is electrically connected with the data communication module, and the display is electrically connected with the data processing module.

[0020] In a second aspect, the present application provides a control method applied to the welding state monitoring system as described in any one of the above, comprising:

[0021] Setting the initial value of the welding parameter as zero on the controller, and setting the warning value;

[0022] Controlling the monitoring system to start, and welding under the condition that the display is normal;

[0023] Controlling the controller to calculate the thermal stress value during the welding process;

[0024] Stopping welding in the case that at least one of the welding deformation, the welding area temperature and the thermal stress value reaches the warning value detected by the monitoring system.

[0025] According to one embodiment of the present application, the stopping welding in the case that at least one of the welding deformation, the welding area temperature and the thermal stress value reaches the warning value detected by the monitoring system comprises:

[0026] Discarding the test piece in the case that the welding deformation or the welding area temperature reaches the warning value; or,

[0027] Cooling the weld and the brazing seam and performing radiographic testing on the brazing seam in the case that the thermal stress value reaches the warning value.

[0028] According to one embodiment of the present application, the cooling the weld and the brazing seam and performing radiographic testing on the brazing seam in the case that the thermal stress value reaches the warning value comprises:

[0029] Repeating the welding process in the case that the radiographic testing is qualified; or,

[0030] Discarding the test piece in the case that the radiographic testing is unqualified.

[0031] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0033] Figure 1 This is a schematic diagram of the structure of the test piece in the ceramic and metal component welding condition monitoring system provided in this application embodiment;

[0034] Figure 2 yes Figure 1 Sectional view at point AA;

[0035] Figure 3 yes Figure 2 A magnified view of a section at point B in the middle;

[0036] Figure 4 yes Figure 2 A magnified view of a section at point C;

[0037] Figure 5 This is a schematic diagram of the structure of the ceramic brazing component in the ceramic-metal component welding condition monitoring system provided in the embodiments of this application;

[0038] Figure 6 This is a schematic diagram of the welding condition monitoring system for ceramic and metal components provided in the embodiments of this application;

[0039] Figure 7 This is a flowchart of the welding condition monitoring system for ceramic and metal components provided in the embodiments of this application.

[0040] Figure label:

[0041] A welding condition monitoring system for ceramic and metal components 1;

[0042] Test piece 10;

[0043] First thin-walled metal component 110, second thin-walled metal component 120;

[0044] Ceramic brazed part 130, first metal part 131, second metal part 132, ceramic part 133;

[0045] Weld 140, first weld 141, second weld 142;

[0046] Brazed joint 150, first brazed joint 151, second brazed joint 152;

[0047] Detection device 20, X-ray detector 210, infrared thermometer 220, strain gauge 230;

[0048] Welding fixture 30;

[0049] First direction X. Detailed Implementation

[0050] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as limiting the present application.

[0051] The present application aims to at least solve one of the technical problems existing in the related art. To this end, the present application proposes a welding state monitoring system for ceramic and metal parts and a control method thereof, which helps to reduce the failure risk of brazing seams in other welding processes.

[0052] Reference is made below to Figures 1-7 A welding state monitoring system for ceramic and metal parts according to an embodiment of the present application is described.

[0053] As shown in Figure 1 , Figure 2 and Figure 6 , the welding state monitoring system for ceramic and metal parts 1 comprises:

[0054] a test piece 10, the test piece 10 comprising: a ceramic brazing piece 130, a first metal thin-walled piece 110, and a second metal thin-walled piece 120;

[0055] a detection device 20 configured to detect welding parameters of corresponding weld seams 140 in the process of welding the ceramic brazing piece 130 with the first metal thin-walled piece 110 and the ceramic brazing piece 130 with the second metal thin-walled piece 120, the welding parameters comprising welding deformation and welding area temperature, the weld seams 140 are each arranged around the test piece 10, and the side of the test piece 10 away from the weld seams 140 forms a brazing seam 150;

[0056] a controller electrically connected with the detection device 20, configured to calculate a thermal stress value according to the welding deformation and the welding area temperature, and the controller judges the welding state of the test piece 10 through the welding parameters and the thermal stress value;

[0057] a display electrically connected with the controller, for displaying the welding state;

[0058] wherein the detection device 20 comprises a radiographic detector 210, the radiographic detector 210 being configured to perform radiographic detection on the brazing seam 150 when the thermal stress value is not less than a warning value.

[0059] In this embodiment, the ceramic brazing piece 130 is formed by brazing a ceramic part and a metal part. During the welding process of the ceramic brazing piece 130 and the metal thin-walled piece, the welding area and the brazing seam 150 of the ceramic brazing piece 130 easily affect each other. The welding parameters of the welding seam 140 can be monitored in real time by the welding state monitoring system. The failure condition of the brazing seam 150 is set as a warning value. When the welding parameters reach the warning value, the welding is stopped. Whether the brazing seam 150 is failed is judged. A series of processing measures are taken, such as replacing the test piece 10 and re-welding when it is determined that the brazing seam 150 is failed, and continuing to weld after the welding parameters are monitored to be lower than the warning value when it is determined that the brazing seam 150 is not failed.

[0060] The axial direction of the test piece 10 is defined as the first direction X. The test piece 10 can include the ceramic brazing piece 130, the first metal thin-walled piece 110, and the second metal thin-walled piece 120. The ceramic brazing piece 130 is formed with the brazing seam 150 at both ends in the first direction X. The first metal thin-walled piece 110 and the second metal thin-walled piece 120 are respectively welded with the ceramic brazing piece 130 at both ends in the first direction X. The welding seam 140 is located on the side of the ceramic brazing piece 130 away from the brazing seam 150. The projection of the welding seam 140 and the brazing seam 150 in the radial direction of the test piece 10 at least partially overlaps, such as the ceramic brazing piece 130 being hollow inside. The brazing seam 150 is located on the outside of the ceramic brazing piece 130. The welding seam 140 is located on the inside of the ceramic brazing piece 130.

[0061] It should be noted that the welding method between the ceramic brazing piece 130 and the metal thin-walled piece includes but is not limited to argon arc welding. The application field of the test piece 10 includes but is not limited to the field of nuclear fusion.

[0062] The welding parameters at least include the welding deformation and the welding area temperature. The welding deformation and the welding area temperature of the new welding area will cause the deformation and temperature rise of the original brazing seam 150. The detection device 20 is mainly used to detect the welding deformation and the welding area temperature of the first welding seam 141 during the welding process of the ceramic brazing piece 130 and the first metal thin-walled piece 110, and to detect the welding deformation and the welding area temperature of the second welding seam 142 during the welding process of the ceramic brazing piece 130 and the second metal thin-walled piece 120.

[0063] In addition, the controller is electrically connected with the detection device 20. The controller can calculate the thermal stress value of the welding area through the welding deformation and the welding area temperature. The welding deformation, the welding area temperature, and the thermal stress value are compared with the corresponding warning values, respectively, so as to judge the welding state of the test piece 10. The warning value corresponding to the welding deformation is the allowable strain value of the brazing seam 150. The warning value corresponding to the welding area temperature is the allowable welding temperature of the brazing seam 150. The warning value corresponding to the thermal stress value is the allowable stress of the brazing seam 150.

[0064] It should be noted that when the detected welding deformation is not less than the allowable strain value of the brazing seam 150, the strain generated in the welding process of the brazing seam 150 is too large, at which time the brazing seam 150 fails. When the detected welding area temperature is not less than the allowable welding temperature of the brazing seam 150, the temperature of the brazing seam 150 is too high, the solder melts due to the too high temperature, which reduces the strength of the brazing seam 150, at which time the brazing seam 150 fails.

[0065] The detection device 20 can include a ray detector 210 for performing ray detection on the brazing seam 150. When the calculated thermal stress value is not less than the allowable stress of the brazing seam 150, the stress generated in the welding process is too large, which can cause the brazing seam 150 to fail, but at this time the brazing seam 150 has not failed. The welding can be immediately stopped, and the brazing seam 150 and the welding area are cooled. After cooling to a welding area temperature less than the allowable welding temperature of the brazing seam 150, the brazing seam 150 is detected by the ray detector 210 to determine whether the brazing seam 150 has failed. When the brazing seam 150 fails, the welding is stopped and the measured piece 10 is replaced. When the brazing seam 150 has not failed, the welding continues.

[0066] The display and the controller are electrically connected, and are used to display the welding state. When the welding deformation, the welding area temperature and the thermal stress value are all less than the warning value, the display displays that the welding state is normal, and the welding continues. When the thermal stress value is not less than the warning value, the display displays that the welding state is slightly abnormal, the brazing seam 150 will fail, the brazing seam 150 and the welding area are cooled, the brazing seam 150 is detected by the ray detector 210 to determine whether the brazing seam 150 has failed. When the brazing seam 150 fails, the welding is stopped and the measured piece 10 is replaced. When the brazing seam 150 has not failed, the welding continues after the display displays that the welding state is normal. When the welding deformation or the welding area temperature is not less than the warning value, the display displays that the welding state is seriously abnormal, the brazing seam 150 has failed, the welding is stopped and the measured piece 10 is replaced.

[0067] In the related art, the ceramic workpiece and the metal workpiece often need to be welded by brazing. After brazing, the ceramic brazing piece 130 and the metal thin-walled piece are usually welded again. However, the quality of the brazing seam 150 of the ceramic brazing piece 130 is affected by the welding temperature, the welding strain and the stress value of the subsequent welding area, and is prone to failure during the subsequent welding process, which needs to be improved.

[0068] According to the welding state monitoring system 1 of the ceramic and metal parts provided in the embodiment of the present application, the welding parameters of the welding seam 140 are monitored in real time during the welding process, the thermal stress value is obtained by processing the welding parameters, and the real-time data is compared with the allowable value of the brazing seam 150, so as to judge the influence of the welding process on the brazing seam 150, which helps to reduce the failure risk of the brazing seam 150.

[0069] In some embodiments, as shown in Figure 2 and Figure 6 The detection device 20 can further include an infrared thermometer 220 for detecting the welding area temperature and a plurality of strain gauges 230 for detecting the welding deformation amount, and the plurality of strain gauges 230 are located on the side of the measured piece 10 forming the welding seam 140 and are distributed on both sides of the welding seam 140 along the first direction X.

[0070] In this embodiment, the welding area temperature can be detected by the infrared thermometer 220, and the welding deformation amount can be detected by the strain gauges 230, wherein the infrared thermometer 220 is arranged apart from the measured piece 10 along the first direction X, and the strain gauges 230 are arranged on the side of the measured piece 10 forming the welding seam 140, such as the hollow inside of the ceramic brazing piece 130, the brazing seam 150 is located on the outside of the ceramic brazing piece 130, the welding seam 140 and the strain gauges 230 are located on the inside of the ceramic brazing piece 130, and the projection of the brazing seam 150 and the welding seam 140 along the first direction X is annular.

[0071] The strain gauges 230 can include a plurality of strain gauges 230 located on the side of the measured piece 10 forming the welding seam 140 and distributed on both sides of the welding seam 140 along the first direction X. For example, the sixteen strain gauges 230 are divided into two groups, and the two groups of strain gauges 230 are distributed on both sides of the welding seam 140 along the first direction X, and the strain gauges 230 are close to the welding seam 140, and each group of eight strain gauges 230 is arranged around.

[0072] In some embodiments, as shown in Figure 2 The plurality of strain gauges 230 located on the same side of the welding seam 140 surround the welding seam 140, and the side of the strain gauges 230 away from the measured piece 10 is provided with a sensor.

[0073] In this embodiment, multiple strain gauges 230 located on the same side of the weld 140 are spaced apart along the circumference of the test piece 10. One side of the strain gauge 230 is in contact with the test piece 10, and the other side is in contact with the sensor. During the welding process, complex elastic and plastic deformations will occur around the weld 140 due to thermal cycling and phase transformation. The strain gauge 230 will also undergo the same deformation as its location. The sensor is used to measure the deformation of the strain gauge 230. The welding deformation of the weld 140 can be monitored in real time through the strain gauge 230 and the sensor.

[0074] In some embodiments, such as Figure 3 and Figure 4 As shown, the ceramic brazing component 130 forms a first brazing joint 151 and a second brazing joint 152 arranged around it, and the first brazing joint 151 and the second brazing joint 152 are respectively located at both ends of the ceramic brazing component 130 along the first direction X.

[0075] The first thin-walled metal component 110 and the ceramic brazing component 130 are welded together to form a first brazing seam 151 at one end, forming a first weld seam 141 arranged around the ceramic brazing component 130. The first weld seam 141 is located on the side of the ceramic brazing component 130 away from the first brazing seam 151.

[0076] The second metal thin-walled part 120 is welded to the ceramic brazed part 130 to form a second brazed joint 152 at one end, forming a second weld joint 142 arranged around the ceramic brazed part 130. The second weld joint 142 is located on the side of the ceramic brazed part 130 away from the second brazed joint 152.

[0077] The projections of the first weld 141 and the second weld 142 along the first direction X are spaced apart in the horizontal direction, and the projections of the first brazed weld 151 and the second brazed weld 152 along the first direction X are spaced apart in the horizontal direction.

[0078] In this embodiment, the test piece 10 includes a ceramic brazed part 130, a first thin-walled metal part 110, and a second thin-walled metal part 120. The ceramic brazed part 130 forms a first brazed seam 151 and a second brazed seam 152 at its two ends along the first direction X. The first thin-walled metal part 110 is welded to one end of the ceramic brazed part 130 that forms the first brazed seam 151, and the second thin-walled metal part 120 is welded to one end of the ceramic brazed part 130 that forms the second brazed seam 152.

[0079] Furthermore, the projections of the first brazed joint 151, the second brazed joint 152, the first weld 141, and the second weld 142 along the first direction X are all annular structures. The projections of the first weld 141 and the second weld 142 along the first direction X are spaced apart in the horizontal direction. The projections of the first brazed joint 151 and the second brazed joint 152 along the first direction X are also spaced apart in the horizontal direction. The second brazed joint 152 is located outside the first brazed joint 151, and the second weld 142 is located outside the first weld 141.

[0080] It should be noted that the wall thickness of the first metal thin-walled piece 110 includes but is not limited to 1 mm, and the wall thickness of the second metal thin-walled piece 120 includes but is not limited to 2 mm.

[0081] In some embodiments, as shown in FIG. 1, the ceramic brazing piece 130 includes a ceramic piece 133, a first metal piece 131 and a second metal piece 132, the first metal piece 131 and the second metal piece 132 are respectively connected to two ends of the ceramic piece 133 along the first direction X, and the ceramic piece 133 and the first metal piece 131 form a first brazing seam 151, and the ceramic piece 133 and the second metal piece 132 form a second brazing seam 152. Figures 3-5

[0082] In this embodiment, the test piece 10 includes the ceramic brazing piece 130, the first metal thin-walled piece 110 and the second metal thin-walled piece 120, and the ceramic brazing piece 130 includes the ceramic piece 133, the first metal piece 131 and the second metal piece 132, wherein one end of the ceramic piece 133 along the first direction X and the first metal piece 131 form the first brazing seam 151, and the other end and the second metal piece 132 form the second brazing seam 152.

[0083] In addition, the first metal thin-walled piece 110 is welded with the first metal piece 131, and the second metal thin-walled piece 120 is welded with the second metal piece 132, in other words, the first metal piece 131 is first brazed with the ceramic piece 133 to form the first brazing seam 151, and then welded with the first metal thin-walled piece 110 to form the first weld seam 141, and the second metal piece 132 is first brazed with the ceramic piece 133 to form the second brazing seam 152, and then welded with the second metal thin-walled piece 120 to form the second weld seam 142, in the process of forming the first weld seam 141, the temperature change and deformation of the first weld seam 141 caused by welding can be transmitted to the first brazing seam 151 through the first metal piece 131, and in the process of forming the second weld seam 142, the temperature change and deformation of the second weld seam 142 caused by welding can be transmitted to the second brazing seam 152 through the second metal piece 132.

[0084] It should be noted that, taking the first weld seam 141 and the first brazing seam 151 as an example, which are distributed between the first metal piece 131 and the ceramic piece 133 along the circumference of the test piece 10, the first weld seam 141 is located at the connection between the first metal piece 131 and the first metal thin-walled piece 110, for example, the first metal piece 131 can include two side walls distributed at intervals along the circumference of the test piece 10, the first brazing seam 151 is located at the inner side of the outer side wall of the first metal piece 131 and the outer side of the ceramic piece 133, the end of the inner side wall of the first metal piece 131 is connected to the end of the first metal thin-walled piece 110, and the first weld seam 141 is located at the end of the inner side wall of the first metal piece 131 and the inner side of the inner side wall. ​

[0085] In the above description, if the welding parameters of the first brazing seam 151 are detected, only the outer side or the end of the outer side wall of the first metal piece 131 can be measured, but the first brazing seam 151 is located on the inner side of the outer side wall of the first metal piece 131, and the first welding seam 141 is located on the inner side of the inner side wall of the first metal piece 131. The detection of the outer side of the outer side wall of the first metal piece 131 cannot timely obtain the influence of the first welding seam 141 on the first brazing seam 151, and the detection system has a high probability of alarming only after the first brazing seam 151 fails.

[0086] The present application can obtain the influence of the welding seam 140 on the brazing seam 150 in advance by detecting the welding parameters of the welding seam 140, which can help reduce the failure risk of the brazing seam 150.

[0087] It should be noted that the wall thickness of the first metal piece 131 is the same as the wall thickness of the first metal thin-walled piece 110, and the wall thickness of the second metal piece 132 is the same as the wall thickness of the second metal thin-walled piece 120. The wall thickness of the first metal piece 131 includes but is not limited to 1 mm, and the wall thickness of the second metal piece 132 includes but is not limited to 2 mm.

[0088] In some embodiments, as shown in Figure 6 The welding state monitoring system 1 of the ceramic and metal parts further includes a welding fixing tool 30, the measured piece 10 is installed on the welding fixing tool 30, and the welding seam 140 is located on the side of the measured piece 10 away from the welding fixing tool 30.

[0089] In this embodiment, the infrared thermometer 220 is distributed apart from the welding fixing tool 30, and the ray detector 210 is installed on the welding fixing tool 30. The welding fixing tool 30 can include a plurality of support portions distributed apart.

[0090] For example, the welding fixing tool 30 can include two support portions distributed apart. The upper end of each support portion is provided with a semicircular mounting groove. At least part of the ceramic brazing piece 130 of the measured piece 10 is located in one of the mounting grooves, and at least part of the second metal thin-walled piece 120 of the measured piece 10 is located in the other mounting groove.

[0091] It should be noted that each of the two support portions is provided with a baffle on the side facing the adjacent support portion, and the baffle extends from the wall of the mounting groove into the mounting groove. The baffle cooperates with the mounting groove to fix part of the measured piece 10 before welding.

[0092] In some embodiments, the controller includes a data acquisition module, a data communication module, and a data processing module. The data acquisition module is electrically connected with the detection device 20. The data communication module is electrically connected with the data acquisition module. The data processing module is electrically connected with the data communication module. The display is electrically connected with the data processing module.

[0093] In this embodiment, the data acquisition module is electrically connected with the detection device 20, the data acquisition module is mainly used for converting the physical quantity detected by the detection device 20 into an electrical signal and digitizing, the data communication module is electrically connected with the data acquisition module, and the data processing module is electrically connected with the data communication module. The data communication module is mainly used for transmitting data to the data processing module, and the data processing module is mainly used for calculating, storing and analyzing data.

[0094] The detection device 20 is configured to detect the welding deformation amount and the welding area temperature of the first weld 141 in the process of welding the ceramic brazing piece 130 and the first metal thin-walled piece 110, and detect the welding deformation amount and the welding area temperature of the second weld 142 in the process of welding the ceramic brazing piece 130 and the second metal thin-walled piece 120. The controller calculates the thermal stress value of the welding area through the welding deformation amount and the welding area temperature.

[0095] As shown in Figure 7 The embodiment of the present application also provides a control method of the welding state monitoring system as any one of the above, which comprises:

[0096] Setting the initial value of the welding parameter to zero on the controller, and setting the warning value;

[0097] Controlling the monitoring system to start, and performing welding under the condition that the display is normal;

[0098] In the welding process, the controller calculates the thermal stress value;

[0099] In the case that the monitoring system detects that at least one of the welding deformation amount, the welding area temperature and the thermal stress value reaches the warning value, the welding is stopped.

[0100] In this embodiment, the control method of the welding state monitoring system comprises steps 101, 102, 103 and 104.

[0101] Step 101 comprises: setting the initial value of the welding parameter to zero on the controller, and setting the warning value.

[0102] The detection device 20 is used for detecting the welding parameter, the welding parameter comprises the welding deformation amount and the welding area temperature, the controller is used for calculating the thermal stress value through the welding deformation amount and the welding area temperature, the warning value of the welding deformation amount is the allowable strain value of the brazing seam 150, the warning value of the welding area temperature is the allowable welding temperature of the brazing seam 150, and the warning value of the thermal stress value is the allowable stress of the brazing seam 150.

[0103] Step 102 comprises: controlling the monitoring system to start, and performing welding under the condition that the display is normal.

[0104] Step 103 comprises: in the welding process, the control controller calculates the thermal stress value;

[0105] Step 104 comprises: in the case that the monitoring system detects that at least one of the welding deformation, the welding area temperature and the thermal stress value reaches the alarm value, stopping the welding.

[0106] In some embodiments, in the case that the monitoring system detects that at least one of the welding deformation, the welding area temperature and the thermal stress value reaches the alarm value, stopping the welding comprises:

[0107] In the case that the welding deformation or the welding area temperature reaches the alarm value, scrapping the test piece 10; or,

[0108] In the case that the thermal stress value reaches the alarm value, cooling the weld 140 and performing the radiographic inspection on the brazing seam 150.

[0109] In this embodiment, when the welding deformation is not less than the allowable strain value of the brazing seam 150 or the welding area temperature is not less than the allowable welding temperature of the brazing seam 150, the brazing seam 150 fails, the welding is stopped and the test piece 10 is replaced, when the welding deformation is less than the allowable strain value of the brazing seam 150, the welding area temperature is less than the allowable welding temperature of the brazing seam 150, and the thermal stress value is not less than the allowable stress of the brazing seam 150, the brazing seam 150 has not failed, at this time, the brazing seam 150 and the welding area are cooled, the welding area temperature can be reduced, thereby reducing the thermal stress value, and after cooling, the radiographic inspection instrument 210 is used to perform the radiographic inspection on the brazing seam 150 to determine whether the brazing seam 150 fails.

[0110] It should be noted that, unlike the welding deformation and the welding area temperature, the brazing seam 150 fails only after the thermal stress value is not less than the allowable stress of the brazing seam 150 and is maintained for a certain period of time.

[0111] In some embodiments, in the case that the thermal stress value reaches the alarm value, cooling the weld 140 and performing the radiographic inspection on the brazing seam 150 comprises:

[0112] In the case that the radiographic inspection is qualified, repeating the welding process; or,

[0113] In the case that the radiographic inspection is unqualified, scrapping the test piece 10.

[0114] In this embodiment, when the welding deformation is less than the allowable strain value of the brazing seam 150, the welding area temperature is less than the allowable welding temperature of the brazing seam 150, and the thermal stress value is not less than the allowable stress of the brazing seam 150, the brazing seam 150 has not failed, at this time, the brazing seam 150 and the welding area are cooled, the welding area temperature can be reduced, thereby reducing the thermal stress value, after cooling, the brazing seam 150 is detected by the ray detector 210, whether the brazing seam 150 fails is judged, in the case of qualified ray detection, the above welding process is repeated, in the case of unqualified ray detection, the measured piece 10 is scrapped.

[0115] The terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the description and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0116] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0117] In the description of the present application, "first feature" and "second feature" can include one or more features.

[0118] In the description of the present application, "a plurality of" means two or more.

[0119] In the description of the present application, "above" or "below" the first feature in the second feature can include direct contact of the first and second features, or can include indirect contact of the first and second features through another feature therebetween.

[0120] In the description of the application, above, over and on are used to indicate that the first feature is above, over or on the second feature, either directly or obliquely, or simply that the first feature is higher than the second feature.

[0121] In the description of the application, references to "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases above in various places in the specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0122] Although embodiments of this application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations can be made thereto by those of ordinary skill in the art without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.

Claims

1. A system for monitoring the condition of a weld between a ceramic and a metal part, characterized by, The system comprises: a test piece, which comprises a ceramic brazing piece, a first metal thin-walled piece and a second metal thin-walled piece; a detection device configured to detect welding parameters of corresponding welds during welding of the ceramic brazing piece and the first metal thin-walled piece and welding of the ceramic brazing piece and the second metal thin-walled piece, the welding parameters comprising a welding deformation amount and a welding area temperature, the welds being arranged around the test piece, and a brazing seam being formed on a side of the test piece away from the welds; a controller electrically connected to the detection device, the controller calculating a thermal stress value of a welding area by means of the welding deformation amount and the welding area temperature, and comparing the welding deformation amount, the welding area temperature and the thermal stress value with corresponding warning values respectively to determine a welding state of the test piece, the warning value corresponding to the welding deformation amount being a brazing seam allowable strain value, the warning value corresponding to the welding area temperature being a brazing seam allowable welding temperature, and the warning value corresponding to the thermal stress value being a brazing seam allowable stress; a display electrically connected to the controller and configured to display the welding state; wherein the detection device comprises a radiation detector, and the radiation detector is configured to perform radiation detection on the brazing seam when the thermal stress value is not less than the warning value; an axial direction of the test piece is defined as a first direction, the ceramic brazing piece forms a first brazing seam and a second brazing seam arranged around, and the first brazing seam and the second brazing seam are located at two ends of the ceramic brazing piece along the first direction respectively; the first metal thin-walled piece is welded with one end of the first brazing seam of the ceramic brazing piece to form a first weld arranged around, and the first weld is located on a side of the ceramic brazing piece away from the first brazing seam; the second metal thin-walled piece is welded with one end of the second brazing seam of the ceramic brazing piece to form a second weld arranged around, and the second weld is located on a side of the ceramic brazing piece away from the second brazing seam; wherein projections of the first weld and the second weld along the first direction are spaced apart in a horizontal direction, and projections of the first brazing seam and the second brazing seam along the first direction are spaced apart in the horizontal direction; the ceramic brazing piece comprises a ceramic piece, a first metal piece and a second metal piece, the first metal piece and the second metal piece are connected to two ends of the ceramic piece along the first direction respectively, and the ceramic piece and the first metal piece form the first brazing seam, and the ceramic piece and the second metal piece form the second brazing seam.

2. The welding state monitoring system for ceramic and metal components according to claim 1, wherein the detection device further comprises an infrared thermometer and a plurality of strain gauges, the infrared thermometer is configured to detect the welding area temperature, and the strain gauges are configured to detect the welding deformation amount, and the plurality of strain gauges are located on a side of the test piece forming the welds, and the plurality of strain gauges are distributed on two sides of the welds along the first direction and spaced apart.

3. The welding state monitoring system for ceramic and metal components according to claim 2, wherein A plurality of the strain gauges located on the same side of the weld joint surround the weld joint, and the strain gauges are provided with sensors on the side away from the measured member.

4. The ceramic-to-metal component weldment condition monitoring system of any one of claims 1-3, wherein, Further comprising: A welding fixture, the measured member is installed on the welding fixture, and the weld joint is located on the side of the measured member away from the welding fixture.

5. The ceramic-to-metal component weldment condition monitoring system of any one of claims 1-3, wherein, The controller comprises a data acquisition module, a data communication module and a data processing module, the data acquisition module is electrically connected with the detection device, the data communication module is electrically connected with the data acquisition module, the data processing module is electrically connected with the data communication module, and the display is electrically connected with the data processing module.

6. A control method applied to the welded condition monitoring system of ceramic and metal parts according to any one of claims 1 to 5, characterized in that, Further comprising: The initial value of the welding parameter is set to zero on the controller, and the warning value is set; The control monitoring system is started, and the welding is carried out under the condition that the display is normal; During the welding process, the controller calculates the thermal stress value; In the case that at least one of the welding deformation, the welding area temperature and the thermal stress value reaches the warning value detected by the monitoring system, the welding is stopped.

7. The control method of claim 6, wherein The welding is stopped in the case that at least one of the welding deformation, the welding area temperature and the thermal stress value reaches the warning value detected by the monitoring system, comprising: In the case that the welding deformation or the welding area temperature reaches the warning value, the measured member is scrapped; or, In the case that the thermal stress value reaches the warning value, the weld joint and the brazing joint are cooled, and the brazing joint is radiographically detected.

8. The control method of claim 7, wherein The weld joint and the brazing joint are cooled, and the brazing joint is radiographically detected in the case that the thermal stress value reaches the warning value, comprising: In the case that the radiographic detection is qualified, the welding process is repeated; or, In the case that the radiographic detection is unqualified, the measured member is scrapped.

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