A spectral diagnosis device suitable for narrow space welding and micro plasma

Abstract

A kind of spectral diagnostic device suitable for narrow space welding and micro plasma, including plasma acquisition device, three-dimensional moving device and fixed support, plasma acquisition device includes plasma collection pipeline, umbrella end protective cover, spectrometer probe fixed cabin arranged at the rear end of plasma collection pipeline, protective lens for protecting spectrometer probe and gas delivery cabin for conveying gas to plasma collection pipeline are arranged in plasma collection pipeline;Three-dimensional moving device is used to install plasma acquisition device, realize the movement of plasma acquisition device in three-dimensional space;Fixed support is used to fix three-dimensional moving device on welding robot, and adjust the position and angle of three-dimensional moving device relative to welding robot.The spectral diagnostic device of the application can avoid the influence of welding fume on plasma acquisition and damage spectrometer probe by welding spatter, realize the plasma detection inside narrow space and micro area.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of spectral diagnostic devices, in particular to a kind of spectral diagnostic devices suitable for narrow space welding and micro plasma. BACKGROUND

[0002] Spectral diagnosis is spectral analysis method, by detecting plasma spectrum intensity and profile information, further obtains plasma electron density, temperature and other information.Spectral analysis method belongs to indirect measurement, will not affect plasma, and the information obtained is abundant.In the field of welding, plasma plume analysis, welding quality spectral monitoring, composite welding heat source interaction spectral analysis and so on can be carried out.In welding special-shaped parts or narrow space welding, due to space limitation, spectrometer probe cannot directly go into narrow space, leading to unable to collect plasma information or insufficient collection accuracy.

[0003] The existing spectral diagnosis method is that spectrometer probe is directly pointed to welding position, and the whole welding position plasma spectrum signal is collected, and the obtained spectrum signal reflects the change of overall plasma physical signal, cannot reflect the change of certain micro area plasma, and is affected by welding dust and spatter, cannot guarantee collection accuracy.In narrow space welding, probe cannot go into narrow space, will affect collection accuracy, and micro plasma cannot be realized.In actual welding, plasma density and temperature of different micro areas are different, especially in swing laser-arc composite welding, when light beam swings to different positions, its plasma density will also change.Therefore, it is necessary to seek a kind of spectral diagnosis device suitable for narrow space welding and micro plasma. SUMMARY

[0004] The present application aims to solve the problem that the prior art cannot collect narrow space welding and micro plasma spectrum information, and provides a kind of spectral diagnosis device suitable for narrow space welding and micro plasma.

[0005] The technical scheme adopted by the present application to achieve its purpose is: a kind of spectral diagnosis device suitable for narrow space welding and micro plasma, including plasma collection device, three-dimensional moving device and fixed support;

[0006] The plasma collection device includes plasma collection pipeline, umbrella end protection cover, spectrometer probe fixed cabin arranged at the rear end of the plasma collection pipeline, protective lens arranged in the plasma collection pipeline for protecting spectrometer probe and gas supply cabin arranged between the spectrometer probe fixed cabin and umbrella end protection cover, which can deliver gas to the plasma collection pipeline;

[0007] The air feeding cabin is wrapped outside the plasma collection pipe, and the air feeding cabin wrapped plasma collection pipe is provided with air holes for feeding the air in the air feeding cabin into the plasma collection pipe;

[0008] The three-dimensional moving device is used for mounting the plasma collection device to realize the movement of the plasma collection device in three-dimensional space.

[0009] The fixing support is used for fixing the three-dimensional moving device on the welding robot and adjusting the position and angle of the three-dimensional moving device relative to the welding robot.

[0010] The method for realizing the spectrum diagnosis of the spectrum diagnosis device is as follows: fixing the spectrometer probe in the spectrometer probe fixing cabin of the plasma collection device, mounting the plasma collection device on the three-dimensional moving device, then fixing the three-dimensional moving device on the welding robot and adjusting the position of the three-dimensional moving device relative to the welding robot, so that the plasma collection pipe of the plasma collection device is at a suitable angle and position. The air feeding cabin is used for feeding air into the plasma collection pipe, and the air flow is controlled in a suitable range to avoid affecting the welding plasma; the plasma collection pipe is placed at the welding position in a narrow space to realize the collection of the welding plasma signal in the narrow space; the plasma collection pipe is directed to a certain area of the plasma, and the detection area is adjusted by adjusting the three-dimensional moving device during the collection process.

[0011] Compared with the prior art, the spectrum diagnosis device has the following beneficial effects:

[0012] 1. The spectrum diagnosis device is provided with an air feeding cabin, the air feeding cabin enters the plasma collection pipe through the air holes on the plasma collection pipe to complete the coaxial air feeding, the smoke and dust at the end of the spectrum collection device is removed, the interference of the smoke and dust on the spectrum collection is avoided, the collection accuracy is ensured, and the air feeding cabin plays a role in buffering the air flow, the flow rate of the air sent after passing through the air feeding cabin is slower, and the influence on the plasma is further reduced.

[0013] 2. The spectrum diagnosis device is provided with an umbrella end protection cover and a protection lens, which can prevent the splashing generated during welding from damaging the internal structure of the plasma collection device such as the spectrometer probe, the air feeding cabin, the protection lens, the spectrometer probe fixing cabin and the like.

[0014] 3. The spectrum diagnosis device is provided with a spectrometer probe fixing cabin, which can be used for positioning spectrometer probes of different models.

[0015] 4. The plasma collection pipe of the spectrum diagnosis device can be selected in length and thickness according to the welding condition, and can be deeply inserted into the inside of the narrow space during the welding in the narrow space to perform spectrum diagnosis.

[0016] 5. The spectral diagnostic device of the present invention is equipped with a three-dimensional moving device, which enables the plasma acquisition device to move in three-dimensional space and is used to acquire plasma signals from different micro-regions.

[0017] Furthermore, the plasma collection pipe described in this invention is located at the central axis of the umbrella-end protective cover.

[0018] Furthermore, the present invention provides two umbrella-end protective covers, both of which are arranged at the front end of the spectrometer probe fixing chamber. The umbrella-end protective cover located at the front end is referred to as umbrella-end protective cover one, and the umbrella-end protective cover located between umbrella-end protective cover one and the spectrometer probe fixing chamber is referred to as umbrella-end protective cover two. The air supply chamber is installed inside umbrella-end protective cover one, and the protective lens is installed inside umbrella-end protective cover two.

[0019] The installation of two umbrella-shaped protective covers not only provides better protection against splashes and safeguards the internal structure of the plasma collection device, including the spectrometer probe, gas delivery chamber, protective lens, and spectrometer probe mounting chamber, but also facilitates the installation of the gas delivery chamber and protective lens, making the entire structure more coordinated and stable.

[0020] Furthermore, the air delivery chamber of the present invention includes an air delivery chamber body with external threads installed on the inner side of the umbrella end protective cover and an air chamber cover with internal threads. The air chamber cover is provided with a through hole through which a plasma collection pipe can pass and an air pipe connector for connecting the air pipe.

[0021] Gas enters the gas delivery chamber from the gas pipe connector, and then enters the plasma collection pipe from the gas delivery chamber through the vent on the plasma collection pipe to complete coaxial gas delivery.

[0022] Furthermore, the spectrometer probe fixing chamber of the present invention includes a fixing chamber body, a spectrometer probe slot for fixing the front end of spectrometer probes of different sizes is provided at the front end of the fixing chamber body, a fixing chamber cover is provided at the rear end of the fixing chamber body, a fixing rod installed on the fixing chamber cover by a wing nut and a rubber pad at the front end of the fixing rod, and the axial position of the fixing rod is adjusted by the wing nut so that the rubber pad presses against the rear end of the spectrometer probe.

[0023] Furthermore, the three-dimensional moving device of the present invention includes a moving stage and an adjustment device with a micrometer that can adjust the position of the moving stage in the X, Y, and Z directions. The plasma collection device is mounted on the moving stage. By adjusting the position of the moving stage through the adjustment device, the plasma collection device can be moved in three-dimensional space to collect plasma signals from different micro-regions.

[0024] The adjustment device of the three-dimensional moving device is equipped with a micrometer, and the motion accuracy can reach 0.01mm. It can precisely adjust the plasma collection area of ​​the plasma collection device to realize the collection of plasma signals in different micro-regions.

[0025] Further, the specific way of installing the plasma collection device on the mobile station is that a triangular clamping groove is fixed on the mobile station, the triangular clamping groove comprises a triangular clamping groove base, a locking sleeve and locking screws arranged on the side surface of the locking sleeve, the spectrum probe fixing cabin part of the plasma collection device is arranged between the triangular clamping groove base and the locking sleeve, and the locking screws are rotated to press the outer wall of the spectrum probe fixing cabin, so that the plasma collection device is fixed.

[0026] Further, the fixing support comprises a first support rod, a second support rod, a connecting block which is axially movable along the first support rod, a first fixing block, a second fixing block and a third fixing block which are axially movable along the second support rod; the connecting block is fixedly connected with the welding robot, the first fixing block and the second fixing block are rotatably connected, and the third fixing block is fixedly connected with the three-dimensional moving device.

[0027] In this way, the position and angle of the three-dimensional moving device can be conveniently adjusted through the fixing support, and the position and angle of the plasma collection device are further adjusted, so that the three-dimensional moving device can collect the plasma when welding at different positions and angles.

[0028] The application will be further described in detail through specific embodiments and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 FIG. 1 is a front view structural schematic diagram of the plasma collection device of the embodiment of the application.

[0030] Figure 2 FIG. 2 is an A-A sectional view structural schematic diagram of the front view structure of the plasma collection device of the embodiment of the application.

[0031] Figure 3 FIG. 3 is a side view structural schematic diagram of the plasma collection device of the embodiment of the application.

[0032] Figure 4 FIG. 4 is a three-dimensional structural schematic diagram of the spectrum diagnostic device of the embodiment of the application.

[0033] In the drawings, 1 is a plasma collection pipeline, 2 is a gas feeding cabin, 3 is a spectrum probe fixing cabin, 4 is a gas pipe joint, 5 is a spectrum probe, 6 is an umbrella end protection cover one, 7 is a protection lens, 8 is an umbrella end protection cover two, 9 is a rubber pad, 10 is a fixing rod, 11 is a fixing cabin body cover, 12 is a wing nut, 13 is a connecting block, 14 is a first fixing block, 15 is a first support rod, 16 is a second support rod, 17 is a second fixing block, 18 is a locking sleeve, 19 is a locking screw, 20 is a triangular clamping groove base, 21 is a three-dimensional moving device, 22 is a third fixing block, and 23 is a micrometer. DETAILED DESCRIPTION

[0034] Embodiment

[0035] A spectral diagnosis device suitable for welding in narrow space and micro plasma, Figure 4 A schematic diagram of three-dimensional structure of the embodiment spectral diagnosis device is shown in the figure, Figure 4 As shown, the spectral diagnosis device comprises a plasma collection device, a three-dimensional moving device 21 and a fixed support, and the structural features are:

[0036] The plasma collection device comprises a plasma collection pipeline 1, an umbrella end protection cover, a spectrometer probe fixed cabin 3 arranged at the rear end of the plasma collection pipeline 1, a protection lens 7 arranged in the plasma collection pipeline 1 for protecting the spectrometer probe 5, and a gas delivery cabin 2 arranged between the spectrometer probe fixed cabin 3 and the umbrella end protection cover, which can deliver gas to the plasma collection pipeline 1;

[0037] The gas delivery cabin 2 is wrapped outside the plasma collection pipeline 1, and the plasma collection pipeline 1 wrapped by the gas delivery cabin 2 is provided with a gas passage hole for sending the gas in the gas delivery cabin 2 into the plasma collection pipeline 1;

[0038] The three-dimensional moving device 21 is used to install the plasma collection device and realize the movement of the plasma collection device in three-dimensional space;

[0039] The fixed support is used to fix the three-dimensional moving device 21 on the welding robot and adjust the position and angle of the three-dimensional moving device 21 relative to the welding robot.

[0040] The plasma collection pipeline 1 in the embodiment is located at the central axis position of the umbrella end protection cover.

[0041] The umbrella end protection cover in the embodiment has two, both of which are arranged at the front end of the spectrometer probe fixed cabin 3, the umbrella end protection cover at the frontmost end is marked as umbrella end protection cover one 6, and the umbrella end protection cover between the umbrella end protection cover one 6 and the spectrometer probe fixed cabin 3 is marked as umbrella end protection cover two 8; the gas delivery cabin 2 is installed on the inner side of the umbrella end protection cover one 6, and the protection lens 7 is installed on the inner side of the umbrella end protection cover two 8. In this example, the two umbrella end protection covers and the umbrella end protection cover and the spectrometer probe fixed cabin are positioned by positioning pins, which specifically include that the umbrella end protection cover one is machined with a positioning pin on the inner side, the umbrella end protection cover two is machined with a positioning pin and a positioning hole on the inner and outer sides respectively, the spectrometer probe fixed cabin is machined with a positioning hole on the outer side, and the umbrella end protection cover one, the umbrella end protection cover two and the spectrometer probe fixed cabin are connected in sequence through the positioning hole and the positioning pin, so as to ensure the coaxiality of the plasma collection device.

[0042] The air supply cabin 2 in the embodiment includes an air supply cabin 2 body with external threads installed on one inner side of the umbrella end protection cover and an air cabin cover with internal threads, the air cabin cover is provided with a through hole through which the plasma collection pipe 1 passes and an air pipe joint 4 for connecting an air pipe.

[0043] The spectrometer probe fixing cabin 3 in the embodiment includes a fixing cabin body, the front end of the fixing cabin body is provided with a spectrometer probe clamping groove for fixing the front end of a spectrometer probe of different sizes, the rear end of the fixing cabin body is provided with a fixing cabin body cover 11, a fixing rod 10 installed on the fixing cabin body cover 11 through a wing nut 12 and a rubber pad 9 at the front end of the fixing rod 10, the axial position of the fixing rod 10 is adjusted through the wing nut 12, so that the rubber pad 9 presses the rear end of the spectrometer probe.

[0044] Figure 1 It is a front view structural schematic diagram of the plasma collection device in the embodiment. Figure 2 It is Figure 1 It is an A-A sectional view schematic diagram, that is, an A-A sectional view schematic diagram of the front view structure of the plasma collection device in the embodiment. Figure 3 It is a side view structural schematic diagram of the plasma collection device in the embodiment.

[0045] The three-dimensional moving device 21 in the embodiment includes a moving table and an adjusting device with a micrometer 23 for adjusting the position of the moving table in X, Y and Z directions, the plasma collection device is installed on the moving table, the position of the moving table is adjusted through the adjusting device, so that the movement of the plasma collection device in the three-dimensional space can be realized, and the plasma signals in different micro areas can be collected.

[0046] The specific way of installing the plasma collection device on the moving table in the embodiment is that a triangular clamping groove is fixed on the moving table, the triangular clamping groove includes a triangular clamping groove base 20, a locking sleeve 18 and locking screws 19 arranged on the side surface of the locking sleeve 18, the spectrometer probe fixing cabin 3 of the plasma collection device is partially arranged between the triangular clamping groove base 20 and the locking sleeve 18, the locking screws 19 are rotated to press the outer wall of the spectrometer probe fixing cabin 3, so that the fixation of the plasma collection device is realized.

[0047] The fixing support in the embodiment includes a first support rod 15, a second support rod 16, a connecting block 13 and a fixed block one 14 which can move axially along the first support rod 15, a fixed block two 17 and a fixed block three 22 which can move axially along the second support rod 16; the connecting block 13 is fixedly connected with a welding robot, the fixed block one 14 and the fixed block two 17 are rotatably connected, and the fixed block three 22 is fixedly connected with the three-dimensional moving device 21.

Claims

1. A spectral diagnostic device suitable for welding in confined spaces and micro-area plasma, comprising a plasma acquisition device, a three-dimensional moving device, and a fixed support, characterized in that: The plasma collection device includes a plasma collection pipe, an umbrella-end protective cover, a spectrometer probe fixing chamber located at the rear end of the plasma collection pipe, a protective lens for protecting the spectrometer probe, and a gas supply chamber located between the spectrometer probe fixing chamber and the umbrella-end protective cover for supplying gas to the plasma collection pipe. The gas supply chamber is wrapped around the outside of the plasma collection pipe, and the plasma collection pipe wrapped by the gas supply chamber has vent holes for supplying gas from the gas supply chamber into the plasma collection pipe. The plasma collection pipe is located at the central axis of the umbrella-end protective cover. There are two umbrella-end protective covers, both arranged at the front end of the spectrometer probe fixing chamber. The umbrella-end protective cover at the front end is designated as umbrella-end protective cover one, and the umbrella-end protective cover located between umbrella-end protective cover one and the spectrometer probe fixing chamber is designated as umbrella-end protective cover two. The gas delivery chamber is installed inside umbrella-end protective cover one, and the protective lens is installed inside umbrella-end protective cover two. The two umbrella-end protective covers are positioned together and between the umbrella-end protective covers and the spectrometer probe fixing chamber by positioning pins. Specifically, positioning pins are machined on the inner side of umbrella-end protective cover one, positioning pins and positioning holes are machined on the inner and outer sides of umbrella-end protective cover two, and positioning holes are machined on the outer side of the spectrometer probe fixing chamber. Umbrella-end protective cover one, umbrella-end protective cover two, and spectrometer probe fixing chamber are connected sequentially by positioning holes and positioning pins to ensure the coaxiality of the plasma collection device. The three-dimensional moving device is used to install the plasma acquisition device and realize the movement of the plasma acquisition device in three-dimensional space. The fixed bracket is used to fix the three-dimensional moving device to the welding robot and to adjust the position and angle of the three-dimensional moving device relative to the welding robot.

2. The spectral diagnostic device for welding in confined spaces and micro-area plasma as described in claim 1, characterized in that: The gas delivery chamber includes a gas delivery chamber body with external threads installed on the inner side of the umbrella end protective cover and a gas chamber cover with internal threads. The gas chamber cover is provided with a through hole through which a plasma collection pipe can pass and a gas pipe connector for connecting the gas pipe.

3. The spectral diagnostic device for welding in confined spaces and micro-area plasma as described in claim 1, characterized in that: The spectrometer probe mounting compartment includes a mounting body, a spectrometer probe slot at the front end of the mounting body for fixing spectrometer probes of different sizes, a mounting body cover at the rear end of the mounting body, a fixing rod mounted on the mounting body cover by a wing nut, and a rubber pad at the front end of the fixing rod. The axial position of the fixing rod is adjusted by the wing nut, thereby pressing the rubber pad tightly against the rear end of the spectrometer probe.

4. The spectral diagnostic device for welding in confined spaces and micro-area plasma as described in claim 1, characterized in that: The three-dimensional moving device includes a moving stage and an adjustment device with a micrometer that can adjust the position of the moving stage in the X, Y, and Z directions. The plasma acquisition device is mounted on the moving stage. By adjusting the position of the moving stage through the adjustment device, the plasma acquisition device can be moved in three-dimensional space to collect plasma signals from different micro-regions.

5. A spectroscopic diagnostic device suitable for welding in confined spaces and micro-area plasma as described in claim 1, characterized in that: The plasma acquisition device is installed on the mobile platform in the following manner: a triangular slot is fixed on the mobile platform. The triangular slot includes a triangular slot base, a locking sleeve, and a locking screw located on the side of the locking sleeve. The spectrometer probe fixing chamber of the plasma acquisition device is placed between the triangular slot base and the locking sleeve. The locking screw is rotated to press the locking screw against the outer wall of the spectrometer probe fixing chamber, thereby fixing the plasma acquisition device.

6. The spectral diagnostic device for welding in confined spaces and micro-area plasma as described in claim 1, characterized in that: The fixed support includes a primary support rod, a secondary support rod, a connecting block and a first fixing block that can move along the axial direction of the primary support rod, and two fixing blocks that can move along the axial direction of the secondary support rod. The connecting block is fixedly connected to the welding robot, the first fixing block and the second fixing block are rotatably connected, and the third fixing block is fixedly connected to the three-dimensional moving device.

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