阅读说明：本技术 搅拌摩擦焊接过程中温度与压下量的在线检测装置 (On-line detection device for temperature and reduction in stirring friction welding process ) 是由 张玉存 米松涛 付献斌 李群 颜芳 张文文 于 2019-10-08 设计创作，主要内容包括：本发明公开一种搅拌摩擦焊接过程中温度与压下量的在线检测装置,其包括安装在搅拌摩擦焊主轴上的圆形卡具、框式支架、调节组件、安装在调节组件上的温度检测模块和压下量检测模块以及通过数据线进行通信连接的工控机；圆形卡具包括半圆卡具、调节固定器和硅胶垫,位于框式支架上方；调节组件包括导轨、滑块、固定轴、转轴、调整块、轴座、轴套和传感器支架。本发明的检测装置通过框式支架使红外热像仪和激光测距传感器在搅拌摩擦焊接过程中随搅拌针移动,不受焊接母材和焊接过程影响,能够在线检测搅拌摩擦焊接过程的温度与压下量,以便及时分析焊接状态,保证焊接质量。(The invention discloses an online detection device for temperature and reduction in a friction stir welding process, which comprises a circular fixture, a frame type support, an adjusting assembly, a temperature detection module and a reduction detection module which are arranged on the adjusting assembly, and an industrial personal computer which is in communication connection through a data line, wherein the circular fixture is arranged on a friction stir welding main shaft; the circular fixture comprises a semicircular fixture, an adjusting fixer and a silica gel pad and is positioned above the frame type support; the adjusting component comprises a guide rail, a sliding block, a fixed shaft, a rotating shaft, an adjusting block, a shaft seat, a shaft sleeve and a sensor bracket. The detection device enables the thermal infrared imager and the laser ranging sensor to move along with the stirring pin in the stirring friction welding process through the frame type support, is not influenced by a welding base metal and the welding process, and can detect the temperature and the pressing amount in the stirring friction welding process on line so as to analyze the welding state in time and ensure the welding quality.)

1. The utility model provides an on-line measuring device of temperature and decrement among friction stir welding process, it includes circular fixture, frame support, adjusting part, temperature detection module, decrement detection module and industrial computer, its characterized in that:

the circular fixture comprises a semicircular fixture and an adjusting fixer, the semicircular fixture and the adjusting fixer are connected end to form a closed circular ring, the upper surface and the inner side surface of the semicircular fixture are respectively connected with the frame type support and a main shaft of friction stir welding, the frame type support comprises a base and upright columns, adjacent upright columns are connected through the base, and the circular fixture is connected with the base through the upright columns;

the side surfaces of the base and the upright post are respectively provided with a guide rail groove, the adjusting assembly comprises a guide rail groove, a sliding block, a fixed shaft, a rotating shaft, an adjusting block, a shaft seat and a shaft sleeve, the sliding block is arranged in the guide rail groove, the sliding block in the upright post is fixedly connected with the shaft sleeve, two ends of the fixed shaft are respectively in threaded connection with the shaft sleeve, the sliding block in the base is fixedly connected with the shaft seat, two ends of the rotating shaft are respectively in threaded connection with the shaft seat, a first end of the adjusting block is provided with a long circular hole, the long circular hole is connected with the fixed shaft, and a second end of the adjusting block is connected;

the adjusting assembly comprises a first adjusting assembly and a second adjusting assembly, and the first adjusting assembly and the second adjusting assembly are respectively connected with and adjust the temperature detecting module and the rolling reduction detecting module;

the temperature detection module comprises an infrared sensor support and a mounting plate fixing main shaft, a first end of the infrared sensor support is fixedly connected with the mounting plate fixing main shaft and forms a revolute pair with the first adjusting block, a second end of the infrared sensor support is fixedly connected with a first rotating shaft and forms a revolute pair with a first shaft base, the first rotating shaft is parallel to the axis of the mounting plate fixing main shaft, and the first adjusting assembly can adjust the temperature detection module to realize up-and-down movement, front-and-back movement and swinging around the rotating shaft;

the rolling reduction detection module comprises a laser sensor support and an installation fixing shaft, a first end of the laser sensor support is fixedly connected with the installation fixing shaft and forms a revolute pair with the second adjusting block, a second end of the laser sensor support is fixedly connected with the second rotating shaft and forms a revolute pair with the second shaft base, the second rotating shaft is parallel to the axis of the installation fixing shaft, and the second adjusting assembly can adjust the rolling reduction detection module to achieve up-and-down movement, front-and-back movement and swinging around the rotating shaft.

2. The apparatus for on-line detection of temperature and reduction in friction stir welding according to claim 1, wherein: the sliding block and the guide rail groove form a sliding pair, the shaft seat fixedly connected with the sliding block can slide along the guide rail groove on the base, and the shaft sleeve fixedly connected with the sliding block can slide up and down along the guide rail groove on the upright post.

3. The apparatus for on-line detection of temperature and reduction in friction stir welding according to claim 2, wherein: a silica gel pad is arranged between the circular fixture and a main shaft of the friction stir welding to increase friction force, and the size of the circular fixture can be adjusted by the adjusting fixer.

4. The apparatus for on-line detection of temperature and reduction in friction stir welding according to claim 1, wherein: the temperature detection module further comprises a thermal infrared imager, a thermal infrared imager mounting hole and a thermal infrared sensor heat dissipation hole, and the thermal infrared imager is fixed on the thermal infrared sensor support; the rolling reduction detection module further comprises a laser ranging sensor, a sensor mounting hole and a laser sensor heat dissipation hole, and the laser ranging sensor is fixed on the laser sensor support.

Technical Field

The invention relates to a temperature and reduction detection device, in particular to an online temperature and reduction detection device used in a friction stir welding process.

Background

Friction stir welding is a key connection technology aiming at a light metal structure invented by Wayne Thomas and the like of Cambridge welding Association in England in 1991, compared with the original welding technology, the technology has simple principle and few control parameters, reduces the influence of human factors in the welding process, improves the safety condition and the welding quality, is widely applied to the fields of aerospace manufacturing industry, ship manufacturing industry, nuclear energy industry and the like, and the research on the friction stir welding technology at home and abroad is very important and mainly focuses on friction heat generation models of a stirring head and a workpiece, simulation and prediction of the friction stir welding process, migration of welding seam formation and thermoplastic metal, influence of friction stir welding acting force, mechanism of defect formation in the welding seam, residual stress and deformation caused by the friction stir welding and the like. Most of domestic and overseas researches are concentrated on a welding machine process and a welding material, the researches on the aspects of a temperature field, an acting force and a thermoplastic region in the friction stir welding process are mainly concentrated on the aspect of finite element simulation, and the researches on the online detection of the welding thermal property and the reduction of a stirring head are particularly few. At present, the temperature field detection method in the friction stir welding process comprises an infrared thermal image temperature measurement technology, a thermocouple temperature measurement technology and an infinite transmission temperature measurement system. The thermocouple temperature measurement in the detection method needs to be embedded in advance, and the detection method has certain destructiveness to welding base metal and is difficult to apply to actual production; in the prior infrared temperature measurement, a thermal infrared imager tripod is usually arranged near friction stir welding equipment, but the temperature of a stirring head area is difficult to track in real time, and certain requirements are met for the working environment; the wireless transmission temperature measurement system is fixed on the stirring head through the temperature measurement equipment, so that the problem of signal transmission of the measurement system is solved, but the adjustability of the temperature measurement area is still partially insufficient.

In the friction stir welding process, the welding temperature field change process is a dynamic change process, and the dynamic change of the welding temperature directly influences the final shape, the welding seam quality, the performance, the stress deformation and the like of the welding joint. By measuring the welding temperature field, researchers can know the welding quality conveniently and adjust the welding quality in time. Welding pressure can influence friction stir welding in-process generating heat to play the effect of compressing tightly to the plastic metal among the welding process, welding pressure too big or small can all produce the influence to welding quality, and welding pressure has direct relation with the stirring head rolling reduction. The traditional friction stir welding equipment mainly measures the rotating angle of an output shaft of an actuating motor or the position of a machine head moving on a guide rail in a coordinate space through an encoder arranged on the actuating motor or a grating ruler arranged on the guide rail for detecting the rolling reduction of the stirring head, and calculates the rolling reduction of the stirring head, wherein the calculation is accurate for an ideal rigid body, but the rolling reduction is deviated when the flexible base metal is deformed unexpectedly. Therefore, the temperature distribution and the reduction of the stirring head on the welding parent metal are timely and accurately measured, which is the basis for analyzing the welding residual stress, the welding structure and the surface shape of the welding seam and is also the premise for carrying out computer control on the welding process.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide an online detection device for temperature and reduction during friction stir welding, which can not only meet the complex environment during friction stir welding, but also can realize online detection of temperature and reduction under different welding bases and different specifications of friction stir welding equipment, so as to analyze the welding state in time and ensure the welding quality.

The invention relates to an on-line detection device for temperature and reduction in the friction stir welding process, which is realized by the following technical scheme: the device comprises a circular fixture, a frame-type support, an adjusting assembly, a temperature detection module, a draft detection module and an industrial personal computer, wherein the circular fixture comprises a semicircular fixture and an adjusting fixer, the semicircular fixture and the adjusting fixer are connected end to form a closed circular ring, the upper surface and the inner side surface of the semicircular fixture are respectively connected with the frame-type support and a main shaft of friction stir welding, the frame-type support comprises a base and upright columns, adjacent upright columns are connected through the base, and the circular fixture is connected with the base through the upright columns; the side surfaces of the base and the upright post are respectively provided with a guide rail groove, the adjusting assembly comprises a guide rail groove, a sliding block, a fixed shaft, a rotating shaft, an adjusting block, a shaft seat and a shaft sleeve, the sliding block is arranged in the guide rail groove, the sliding block in the upright post is fixedly connected with the shaft sleeve, two ends of the fixed shaft are respectively in threaded connection with the shaft sleeve, the sliding block in the base is fixedly connected with the shaft seat, two ends of the rotating shaft are respectively in threaded connection with the shaft seat, a first end of the adjusting block is provided with a long circular hole, the long circular hole is connected with the fixed shaft, and a second end of the adjusting block is connected; the adjusting assembly comprises a first adjusting assembly and a second adjusting assembly, and the first adjusting assembly and the second adjusting assembly are respectively connected with and adjust the temperature detecting module and the rolling reduction detecting module; the temperature detection module comprises an infrared sensor support and a mounting plate fixing main shaft, a first end of the infrared sensor support is fixedly connected with the mounting plate fixing main shaft and forms a revolute pair with the first adjusting block, a second end of the infrared sensor support is fixedly connected with a first rotating shaft and forms a revolute pair with a first shaft base, the first rotating shaft is parallel to the axis of the mounting plate fixing main shaft, and the first adjusting assembly can adjust the temperature detection module to realize up-and-down movement, front-and-back movement and swinging around the rotating shaft; the rolling reduction detection module comprises a laser sensor support and an installation fixing shaft, a first end of the laser sensor support is fixedly connected with the installation fixing shaft and forms a revolute pair with the second adjusting block, a second end of the laser sensor support is fixedly connected with the second rotating shaft and forms a revolute pair with the second shaft base, the second rotating shaft is parallel to the axis of the installation fixing shaft, and the second adjusting assembly can adjust the rolling reduction detection module to achieve up-and-down movement, front-and-back movement and swinging around the rotating shaft.

Preferably, the sliding block and the guide rail groove form a sliding pair, the shaft seat fixedly connected with the sliding block can slide along the guide rail groove on the base, and the shaft sleeve fixedly connected with the sliding block can slide up and down along the guide rail groove on the upright post.

Preferably, a silica gel pad is arranged between the circular fixture and the main shaft of the friction stir welding to increase friction force, and the size of the circular fixture can be adjusted by the adjusting fixer.

Preferably, the temperature detection module further comprises a thermal infrared imager, a thermal infrared imager mounting hole and a thermal infrared sensor heat dissipation hole, and the thermal infrared imager is fixed on the thermal infrared sensor bracket; the rolling reduction detection module further comprises a laser ranging sensor, a sensor mounting hole and a laser sensor heat dissipation hole, and the laser ranging sensor is fixed on the laser sensor support.

Compared with the prior art, the invention has the following advantages:

(1) the invention realizes the accurate online monitoring of the temperature of the stirring head and the welding base metal in the stirring friction welding process by using the thermal infrared imager, and realizes the real-time detection of the rolling reduction by using the laser ranging sensor. In order to ensure that the surface temperature and the screw-down quantity of the stirring head and the welding parent metal can be detected on line in real time, the thermal infrared imager and the laser ranging sensor are arranged on two sides of the frame type support, and the positions of the sensors are adjusted through the adjusting assembly, so that the thermal infrared imager and the laser ranging sensor can acquire the temperature and the screw-down quantity near the stirring head on line and synchronously move along with the stirring head, and the normal work of the friction stir welding equipment is not influenced.

(2) The invention utilizes the thermal infrared imager to carry out on-line detection on the temperature of the stirring head and the welding parent metal, and transmits the temperature to the industrial personal computer through the data line, thereby displaying the infrared temperature image in real time, realizing the remote real-time detection of temperature distribution and analyzing the welding condition.

(3) The invention uses the laser ranging sensor to detect the pressing amount of the stirring pin on line, and transmits the pressing amount to the industrial personal computer through a data line, and draws the real-time variation curve of the pressing amount of the stirring head in the welding process.

(4) The invention is provided with the adjusting component, when the length of the stirring pin is changed or a research object is not limited near the stirring head, the thermal infrared imager and the laser ranging sensor can be adjusted to move up and down, move back and forth and swing around the rotating shaft, so that the acquisition area of the sensor meets the research requirement.

(5) The support can be conveniently arranged on the friction stir welding equipment, realizes the online detection of the temperature and the reduction in the friction stir welding process, and does not influence the normal work of the friction stir welding equipment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a perspective view of the assembly of the on-line temperature and reduction detecting device for friction stir welding according to the present invention;

FIG. 2 is a perspective view of a circular fixture of the inspection device of the present invention;

FIG. 3 is a schematic perspective view of a frame support of the detecting unit of the present invention;

FIG. 4 is a left side view of the adjustment assembly of the detection device of the present invention;

FIG. 5 is a schematic perspective view of an adjusting assembly and a temperature detecting module of the detecting device of the present invention;

FIG. 6 is a perspective view of an adjusting assembly and a rolling reduction detecting module of the detecting device according to the present invention; and

FIG. 7 is a schematic block diagram of data information transmission of the detecting device of the present invention.

Reference numerals:

a circular jig 1; a frame type support 2; an adjustment assembly 3; a temperature detection module 4; a rolling reduction detection module 5; an industrial personal computer 6;

a first semicircular fixture 11; a second semicircular jig 12; a first adjustment fixture 13; a second adjustment fixture 14; a base 21; a column 22; a first adjustment assembly 31; a second adjustment assembly 32; a thermal infrared imager 41; an infrared sensor holder 42; a thermal infrared imager mounting hole 43; the mounting plate fixing main shaft 44; infrared sensor heat dissipation holes 45; a laser ranging sensor 51; a laser sensor holder 52; mounting the fixed shaft 53; sensor mounting holes 54; a laser sensor heat sink 55;

a first screw hole 111; a second screw hole 121; a first guide rail groove 311; a first bushing 312; a first fixed shaft 313; a first rotating shaft 314; a first adjustment block 315; a first hub 316; a first oblong hole 317; a second rail groove 321; a second bushing 322; a second fixed shaft 323; a second rotating shaft 324; a second adjustment block 325; a second shaft seat 326; a second oblong hole 327.

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 in the embodiments of the present invention. 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.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains. For the reader's understanding, the device is described in terms of its orientation in fig. 1.

As shown in figure 1, the device for detecting the temperature and the reduction in the friction stir welding process comprises a circular fixture 1 arranged on a friction stir welding spindle, a frame type bracket 2, an adjusting assembly 3, a temperature detection module 4 and a reduction detection module 5 arranged on the adjusting assembly, and an industrial personal computer 6 in communication connection through a data line. The components are explained in detail below. As shown in fig. 2, the circular fixture 1 includes a first semicircular fixture 11 and a second semicircular fixture 12 located on the left side and the right side of the spindle, a first adjusting fixer 13 and a second adjusting fixer 14 located on both sides, a first screw hole 111 located on the first semicircular fixture 11, a second screw hole 121 located on the second semicircular fixture 12, and a silicone pad located inside the semicircular fixture, where the silicone pad is used to increase friction between the circular fixture 1 and the spindle, preferably, a polyurethane pad is used to increase friction, the first semicircular fixture 11 and the second semicircular fixture 12 form a complete ring with adjustable size through the first adjusting fixer 13 and the second adjusting fixer 14, the circular fixture 1 is fixed on the spindle of the friction stir welding device through the first screw hole 111 and the second screw hole 121, and the L-shaped friction stir welding shield is also connected to the circular fixture 1 through a bolt connection.

As shown in fig. 3, the frame support 2 includes a horizontally disposed base 21, four vertical columns 22 connecting the base 21 and the circular fixture 1 on the upper portion, the base 21 is four cross-sectional materials on a non-same horizontal plane, the columns 22 are four parallel sectional materials, the columns 22 and the base 21 are fixed by a triangular fixer, the columns 22 are fixed on the circular fixture 1 through second screw holes 121, and the base 21 is a rectangular frame, so that the frame support 2 is sleeved on the lower portion of the friction stir welding spindle without affecting the operation of the spindle. The side surfaces of the base 21 and the upright column 22 are both provided with U-shaped guide rail grooves, and slide blocks are arranged in the guide rail grooves and can slide along the guide rail grooves.

As shown in fig. 4 and 5, there are two sets of adjusting assemblies 3, wherein the first adjusting assembly 31 is connected to the temperature detecting module 4 to adjust the position and posture of the temperature detecting module 4, the second adjusting assembly 32 is connected to the rolling reduction detecting module 5 to adjust the position and posture of the rolling reduction detecting module 5, the first adjusting assembly 31 includes a first guide rail groove 311, a first slider, a first fixing shaft 313, a first rotating shaft 314, a first adjusting block 315, a first shaft seat 316, a first shaft seat 312, and a first long circular hole 317, and the first long circular hole 317 is a first end of the first adjusting block 315. The first guide rail groove 311 includes a guide rail groove on the side surface of the base 21 and a guide rail groove on the side surface of the upright column 22, the first sliding block is sleeved in the first guide rail groove 311, the first fixed shaft 313 penetrates through the first long circular hole 317, two ends of the first fixed shaft 313 are in threaded connection with the first shaft sleeve 312, and the first shaft sleeve 312 is fixedly connected with the first sliding block, so that the first shaft sleeve 312 can slide up and down along the upright column 22; both ends of the first rotating shaft 314 are respectively connected to the first shaft seats 316, and the first shaft seats 316 are connected to the first sliding blocks so as to be capable of sliding along the base 21.

When the first shaft sleeve 312 is adjusted to slide up and down in the first guide rail groove 311 on the side surface of the upright column 22, the infrared sensor support 42 can drive the temperature detection module 4 to swing at an angle through the transmission of the first fixing shaft 313, the first adjusting block 315 and the mounting plate fixing main shaft 44; if the base 21 connected with the first shaft base 316 is adjusted up and down at the same time, the temperature detection module 4 can move up and down; when the first shaft seat 316 is adjusted to slide back and forth in the first guide rail groove 311 on the side surface of the base 21, the infrared sensor support 42 can drive the temperature detection module 4 to slide back and forth through the transmission of the first rotating shaft 314. The three adjusting modes are matched to realize the up-and-down movement, the front-and-back movement and the adjustment of the swinging angle around the axis of the first rotating shaft 314 of the sensor.

As shown in fig. 4 and 5, the temperature detection module 4 includes a thermal infrared imager 41, an infrared sensor bracket 42, a thermal infrared imager mounting hole 43, a mounting plate fixing spindle 44 and infrared sensor heat dissipation holes 45, a second end of the first adjusting block 315 is connected to the mounting plate fixing spindle 44 to form a revolute pair, and the adjustment and fixation of the thermal infrared sensor bracket 42 are realized by combining the first rotating shaft 314, the thermal infrared imager 41 is fixed on the thermal infrared imager mounting hole 43 in the middle of the thermal infrared sensor bracket 42 through a fixture of the thermal infrared imager itself, and one surface of the thermal infrared imager 41 in contact with the infrared sensor bracket 42 dissipates heat through the infrared sensor heat dissipation holes 45, so that the device operation is prevented from being influenced by too long working time. The method is characterized in that a non-refrigeration thermal infrared imager is adopted, the working environment temperature is-15-50 ℃, the temperature measuring range is-40-1200 ℃, the working environment temperature and the temperature measuring range of the thermal infrared image are preferably selected, the detection of the temperature of the special welding parent metal is more suitable, the collected infrared temperature image is transmitted to the industrial personal computer 6 in real time through a data line, the emissivity is calibrated through processing the temperature data of the infrared temperature image, and finally the temperature data of the welding parent metal is displayed on a display screen of the industrial personal computer 6 in real time.

As shown in fig. 6, the second adjusting assembly 32 includes a second guide rail groove 321, a second slider, a second fixing shaft 323, a second rotating shaft 324, a second adjusting block 325, a second shaft seat 326, a second shaft sleeve 322, and a second oblong hole 327, wherein the second oblong hole 327 is a first end of the second adjusting block 325, and the rolling reduction detecting module 5 includes a laser distance measuring sensor 51, a laser sensor bracket 52, a mounting fixing shaft 53, a sensor mounting hole 54, and a laser sensor heat dissipation hole 55. The connection relation of the second adjusting component 32 and the reduction detection module 5 is similar to the assembly relation of the first adjusting component 31 and the temperature detection module 4, and the adjusting mode is also similar, the laser sensor support 52 is adjusted and fixed by the second adjusting block 325 and the second rotating shaft 324, the laser ranging sensor 51 is fixed on the sensor mounting hole 54 through screws, the laser ranging sensor increases heat dissipation through the laser sensor heat dissipation hole 55 on the laser ranging sensor support 52, normal operation of the device is guaranteed, the sensor is preferably fixed through a fixture, and the device is convenient to disassemble.

When the second shaft sleeve 322 is adjusted to slide up and down in the second guide rail groove 321 on the side surface of the upright post 22, the laser sensor bracket 52 can drive the pressing amount detection module 5 to swing at an angle through the transmission of the second fixing shaft 323, the second adjusting block 325 and the mounting fixing shaft 53; if the base 21 connected to the second shaft seat 326 is adjusted up and down at the same time, the up and down movement of the temperature detection module 4 can be realized; when the second axle seat 326 is adjusted to slide back and forth in the second guide rail groove 321 on the side surface of the base 21, the infrared sensor bracket 42 can drive the pressing amount detection module 5 to slide back and forth through the transmission of the second rotating shaft 324. The three adjusting modes are matched to realize the up-and-down movement, the front-and-back movement and the adjustment of the swing angle around the axis of the second rotating shaft 324 of the sensor.

The laser range sensor 51 is adjusted in the same way as the thermal infrared imager 41. And measuring the reduction data according to a laser ranging principle, transmitting the reduction data to the industrial personal computer 6 in real time through a data line, processing and calibrating the distance data, and finally displaying the variation curve of the reduction and the display screen of the industrial personal computer 6 in real time.

As shown in fig. 7, the temperature data measured by the thermal infrared imager 41 and the distance data measured by the laser ranging sensor 51 are transmitted to the industrial personal computer 6 for data processing, the thermal infrared imager transmits the temperature data through the IEEE1394 interface of the industrial personal computer, the IEEE1394 interface transmits the data to support hot plug, the theoretical value of the transmission rate can reach 3.2Gbit/s, the distance data acquired by the laser ranging sensor is transmitted to the industrial personal computer 6 through the USB interface of the industrial personal computer, and the processed reduction variation curve is displayed on the display screen of the industrial personal computer 6 in real time.

The use process of the device is as follows:

when the device is used, firstly, the thermal infrared imager 41 and the laser ranging sensor 51 are respectively fixed on the infrared sensor support 42 and the laser sensor support 52, then the whole device can be sleeved on the main shaft from the lower part of the main shaft by adjusting the height of the stirring friction welding main shaft and is fixed on the main shaft through the first screw hole 111 on the circular fixture 1, the front and back position of the infrared sensor support 42 is adjusted through the first rotating shaft 314 in the first adjusting component 31, the up and down position of the infrared sensor support 42 is adjusted through the first fixing shaft 313 in the first adjusting component 31, the swing angle of the infrared sensor support 42 is adjusted through the position of the first fixing shaft 313 in the first adjusting component 31 in the first long round hole, the thermal infrared imager 41 is enabled to collect a required research area, the adjusting mode is similar to that of the first adjusting component 31 through the adjustment of the second adjusting component 32, the laser ranging sensor 51 is used for collecting the area near the stirring head, after the positions of the two sensors are adjusted, the whole device is fixed on the main shaft and does not shake, after the fixation is firm, the sensors are connected with the industrial personal computer 6, and the operation equipment can display temperature data and a pressure change curve in real time in a display screen of the industrial personal computer 6.

As can be seen from the above description of the online detection device for temperature and reduction in the friction stir welding process of the present invention, the present invention has the following advantages:

(1) the invention realizes the accurate online detection of the temperature of the stirring head and the welding base metal in the stirring friction welding process by using the thermal infrared imager 41, and realizes the online detection of the rolling reduction by using the laser ranging sensor 51. In order to ensure that the surface temperature and the reduction of the stirring head and the welding parent metal can be detected on line, the thermal infrared imager 41 and the laser ranging sensor 51 are arranged on two sides of the frame type support 2, and the position of the sensor is adjusted through the adjusting assembly 2, so that the thermal infrared imager and the laser ranging sensor can acquire the temperature and the reduction near the stirring head on line and synchronously move along with the stirring head, and the normal work of the friction stir welding equipment is not influenced.

(2) The invention utilizes the thermal infrared imager 41 to measure the real-time temperature of the stirring head and the welding parent metal, and transmits the temperature to the industrial personal computer 6 through communication to obtain an infrared temperature image, thereby realizing the remote real-time detection of temperature distribution and analysis of welding conditions.

(3) The invention utilizes the laser ranging sensor 51 to detect the pressing amount of the stirring pin on line and transmits the data to the industrial personal computer 6 to draw the real-time variation curve of the pressing amount of the stirring head in the welding process

(4) The adjusting component 2 is arranged, when the length of the stirring pin is changed or a research object is not limited to be near the stirring head, the displacement of the thermal infrared imager 41 and the laser ranging sensor 51 can be adjusted up and down and back and forth, and the swing angles of the two instruments can be adjusted, so that the acquisition area of the sensor meets the research requirement.

(5) The frame type support 2 can be conveniently installed on friction stir welding equipment, realizes the online detection of the temperature and the reduction in the friction stir welding process, and does not influence the normal work of the friction stir welding equipment.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.