CN113720731A - Detection device for hydrogen content of cast aluminum alloy and use method thereof - Google Patents
Detection device for hydrogen content of cast aluminum alloy and use method thereof Download PDFInfo
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- CN113720731A CN113720731A CN202111113214.6A CN202111113214A CN113720731A CN 113720731 A CN113720731 A CN 113720731A CN 202111113214 A CN202111113214 A CN 202111113214A CN 113720731 A CN113720731 A CN 113720731A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 148
- 238000001514 detection method Methods 0.000 title claims abstract description 64
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 239000001257 hydrogen Substances 0.000 title claims abstract description 35
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 62
- 238000005266 casting Methods 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000003723 Smelting Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001739 density measurement Methods 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
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Abstract
The application discloses detection device for hydrogen content of cast aluminum alloy and a use method thereof, belongs to the field of casting, and solves the problems of poor quality of aluminum alloy castings and high casting cost caused by inaccurate judgment of hydrogen content in aluminum alloy solution in the casting process. Comprises a workbench, a vacuum chamber, a vacuum pump, a heating constant temperature mechanism, a crucible, a density measuring mechanism and a lifting mechanism. The vacuum chamber comprises a placing box and a sealing cover. The placing box is arranged on the workbench. The sealing cover is matched with the placing box and used for covering the placing box. The fixed end of the lifting mechanism is fixed on the workbench, and the telescopic end is connected with the sealing cover and can drive the sealing cover to be attached or keep away from the placing box. The vacuum pump is communicated with the inner cavity of the vacuum chamber. The heating constant temperature mechanism is arranged on the workbench. The crucible is positioned at the heating position of the heating constant temperature mechanism. The density measuring mechanism is arranged on the workbench. The method and the device can accurately judge the hydrogen content in the aluminum alloy solution to be detected, improve the quality of the casting and reduce the casting cost.
Description
Technical Field
The application relates to the technical field of casting, in particular to a detection device for hydrogen content of cast aluminum alloy and a using method thereof.
Background
The aluminum alloy has the advantages of light weight, high specific strength, good heat dissipation, good shock absorption, good electromagnetic shielding property, strong recyclability and the like, and is widely applied to the aviation, aerospace, automobile, mechanical manufacturing, ships and chemical industry.
Aluminum alloy is easy to absorb gas when being smelted in the atmosphere, and hydrogen is the main gas dissolved in the aluminum alloy solution. The solubility of hydrogen in the solid aluminum alloy is lower than that of the aluminum alloy solution by more than ten times or even dozens of times, so that the hydrogen can be separated out from the melt when the aluminum alloy solution is solidified, the aluminum alloy casting has casting defects of pinholes, shrinkage porosity and the like, the mechanical property and the air tightness of the casting are reduced, the yield and the productivity of the casting are reduced, and the casting cost is increased. Therefore, the hydrogen content in the aluminum alloy solution needs to be detected before the aluminum alloy is cast, so that whether the aluminum alloy solution meets the casting requirement is judged, and the quality of the casting is ensured. At present, whether hydrogen is completely removed is judged by observing whether bubbles exist in an aluminum alloy solution through naked eyes, so that whether the aluminum alloy solution is suitable for casting is judged.
Disclosure of Invention
The embodiment of the application provides a detection device for hydrogen content in cast aluminum alloy and a use method thereof, and solves the problems of poor quality of aluminum alloy castings and high casting cost caused by inaccurate judgment of hydrogen content in aluminum alloy solution in the casting process.
In a first aspect, an embodiment of the present invention provides a detection apparatus for hydrogen content in a cast aluminum alloy, where the detection apparatus includes a workbench, a vacuum chamber, a vacuum pump, a heating and constant temperature mechanism, a crucible, a density measurement mechanism, and a lifting mechanism; the vacuum chamber comprises a placing box and a sealing cover; the placing box is arranged on the workbench; the sealing cover is matched with the placing box and is used for covering the placing box; the fixed end of the lifting mechanism is fixed on the workbench, and the telescopic end of the lifting mechanism is connected with the sealing cover and can drive the sealing cover to be attached to or away from the placing box; the vacuum pump is communicated with the inner cavity of the vacuum chamber; the heating constant-temperature mechanism is arranged on the workbench; the crucible is arranged at the heating position of the heating constant temperature mechanism; the density measuring mechanism is arranged on the workbench.
With reference to the first aspect, in one possible implementation manner, the lifting mechanism includes an electric push rod; the fixed end of the electric push rod is fixed on the workbench, the telescopic end of the electric push rod is connected with the sealing cover, and the sealing cover can be driven to be attached to or far away from the placing box.
With reference to the first aspect, in one possible implementation manner, the detection device further includes a three-dimensional control mechanism and a clamping jaw; one end of the three-dimensional control mechanism is arranged on the workbench, and the other end of the three-dimensional control mechanism is connected with the clamping jaw and can drive the clamping jaw to clamp the crucible.
With reference to the first aspect, in one possible implementation manner, the clamping tightness of the clamping jaws is adjustable.
With reference to the first aspect, in one possible implementation manner, the detection apparatus further includes a rotating disk; one end of the rotating disc is rotatably connected with the workbench, and the other end of the rotating disc is connected with the lifting mechanism and can drive the lifting mechanism to rotate.
With reference to the first aspect, in a possible implementation manner, the material of the vacuum chamber includes a stainless steel material.
With reference to the first aspect, in a possible implementation manner, the detection apparatus further includes an observation window; the observation window is arranged on the sealing cover.
With reference to the first aspect, in one possible implementation manner, the density measurement mechanism includes an electronic density balance.
With reference to the first aspect, in a possible implementation manner, the detection device further includes a traveling mechanism; the walking mechanism is arranged at the bottom end of the workbench and used for driving the workbench to move.
In a second aspect, an embodiment of the present invention further provides a method for using a device for detecting a hydrogen content in a cast aluminum alloy, where the device for detecting a hydrogen content in a cast aluminum alloy is used, and includes the following steps:
when the hydrogen content of the aluminum alloy needs to be measured, preheating the crucible by a heating constant temperature mechanism and preserving heat;
taking out the aluminum alloy solution to be measured from the smelting furnace and quickly placing the aluminum alloy solution into the crucible;
the lifting mechanism drives the sealing cover to be far away from the placing box;
placing the crucible on the placing box, and driving the sealing cover to be attached to the placing box by the lifting mechanism;
opening a vacuum pump to extract vacuum, and solidifying the aluminum alloy solution under a certain vacuum degree to obtain an aluminum alloy sample;
the lifting mechanism drives the sealing cover to be far away from the placing box so as to take out the aluminum alloy sample, and the mass of the aluminum alloy sample in the air is measured by using a density measuring mechanism;
immersing the aluminum alloy test sample into water with known density, and measuring the mass of the aluminum alloy test sample in the water by using the density measuring mechanism;
calculating the density value of the aluminum alloy sample according to the Archimedes principle; comparing the density value with an optimal density value, and if the density value is close to the optimal density value, casting the aluminum alloy solution to be detected; and if the difference between the density value and the optimal density value is larger, continuously processing the aluminum alloy solution to be detected.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
the embodiment of the invention provides a detection device for hydrogen content of cast aluminum alloy. The vacuum chamber comprises a placing box and a sealing cover. The placing box is arranged on the workbench. The sealing cover is matched with the placing box and used for covering the placing box. The fixed end of the lifting mechanism is fixed on the workbench, and the telescopic end is connected with the sealing cover and can drive the sealing cover to be attached or keep away from the placing box. The vacuum pump is communicated with the inner cavity of the vacuum chamber. The heating constant temperature mechanism is arranged on the workbench. The crucible is positioned at the heating position of the heating constant temperature mechanism. The density measuring mechanism is arranged on the workbench. In practical application, preheat the crucible earlier, then take out the aluminium alloy solution that awaits measuring from the smelting pot and put into the crucible fast in, elevating system drives sealed lid and keeps away from and place the box, then places the crucible on placing the box, and elevating system drives sealed lid again and closes and place the box. And finally, respectively measuring the mass of the aluminum alloy sample in the air and the water with known density by using a density measuring mechanism, calculating the density value of the aluminum alloy sample according to the Archimedes principle, comparing the density value of the aluminum alloy sample with the optimal density value, and judging whether hydrogen in the aluminum alloy solution to be measured is completely removed or not, thereby judging whether the aluminum alloy solution to be measured can be cast or not. The detection device of the embodiment of the application can rapidly and accurately judge whether hydrogen in the aluminum alloy solution to be detected is removed completely, so that whether the aluminum alloy solution to be detected can be cast is judged, the quality of aluminum alloy castings is improved, the yield and the production rate of the castings are improved, and the casting cost is further reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a detection apparatus for hydrogen content in a cast aluminum alloy according to an embodiment of the present application.
Icon: 1-a workbench; 2-a vacuum chamber; 21-placing a box; 22-a sealing cover; 221-observation window; 3-a vacuum pump; 4-heating a constant temperature mechanism; 5-a crucible; 6-a density measuring mechanism; 7-a lifting mechanism; 8-a traveling mechanism; 9-a handle; 10-a three-dimensional control mechanism; 101-a first telescoping structure; 102-a second telescoping structure; 103-a third telescopic structure; 11-a clamping jaw; 12-rotating the disc.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, 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.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
As shown in FIG. 1, the embodiment of the invention provides a detection device for hydrogen content in cast aluminum alloy, which comprises a workbench 1, a vacuum chamber 2, a vacuum pump 3, a heating constant temperature mechanism 4, a crucible 5, a density measuring mechanism 6 and a lifting mechanism 7. The melting point of the aluminum alloy is high and can reach over 600 ℃, so that the temperature of the aluminum alloy solution to be detected taken out of the smelting furnace is high, if the aluminum alloy solution to be detected is directly solidified in the air, the aluminum alloy solution to be detected can react with gas or impurities in the air in the solidification process, and the accuracy of the detection result is influenced, and therefore, the vacuum chamber 2 is arranged, so that the aluminum alloy solution to be detected is solidified in a vacuum environment, the reaction of the aluminum alloy solution to be detected with the gas or impurities in the air in the solidification process is avoided, and the accuracy of the detection result is ensured. In the embodiment of the present application, the shape of the vacuum chamber 2 is not limited, and as shown in fig. 1, the vacuum chamber 2 has a cylindrical structure, but the vacuum chamber 2 may have other shapes, such as a square, a rectangular parallelepiped, and the like.
In practical use, the vacuum chamber 2 includes a placing box 21 and a sealing cover 22. The placing box 21 is provided on the table 1. The sealing cover 22 is matched with the placing box 21 and used for covering the placing box 21. Since the vacuum chamber 2 needs to be opened to place the aluminum alloy solution to be measured in the vacuum chamber 2 so that the aluminum alloy solution to be measured is solidified in a vacuum environment during the measurement process, the sealing cover 22 is provided to open the vacuum chamber 2 at any time during the measurement process and place the aluminum alloy solution to be measured. In addition, the sealing cover 22 is matched with the placing box 21, so that the vacuum chamber 2 is ensured to be airtight, the solidification environment of the aluminum alloy solution to be detected is more stable, the solidification speed is higher, the time for detecting the hydrogen content in the aluminum alloy solution to be detected is saved, the detection efficiency is improved, and the casting efficiency is improved.
Specifically, the fixed end of the lifting mechanism 7 is fixed on the workbench 1, and the telescopic end is connected with the sealing cover 22, so that the sealing cover 22 can be driven to be attached to or far away from the placing box 21. In practical applications, when the aluminum alloy solution to be measured needs to be placed in the vacuum chamber 2, the lifting mechanism 7 is first controlled by the control system, wherein the control system may be a remote controller, a computer program, or the like, which is not limited in this embodiment. The telescopic end of the lifting mechanism 7 is extended to drive the sealing cover 22 away from the placing box 21 to open the vacuum chamber 2, and then the aluminum alloy solution to be measured is placed on the placing box 21. When the aluminum alloy solution to be measured is placed on the placing box 21, the telescopic end of the lifting mechanism 7 is controlled to be shortened through the control system, so that the sealing cover 22 is driven to reset to cover the placing box 21 and further close the vacuum chamber 2. After the aluminum alloy solution to be measured is solidified into the aluminum alloy sample in the vacuum chamber 2, the aluminum alloy sample needs to be taken out for measurement, and at the moment, the telescopic end of the lifting mechanism 7 is controlled to extend through the control system, so that the sealing cover 22 is driven to be far away from the placing box 21 to open the vacuum chamber 2. The lifting mechanism 7 enables the vacuum chamber 2 to be opened and closed without manual operation, and labor cost is saved. Meanwhile, in the detection process, an operator does not need to contact the sealing cover 22, and the sealing cover 22 is kept clean, so that the cleanness of the inside of the vacuum chamber 2 is ensured, the reaction of the aluminum alloy solution to be detected and impurities in the solidification process is avoided, and the accuracy of the detection result is further ensured. In addition, the speed of opening or closing the vacuum chamber 2 by using the lifting mechanism 7 is high, so that the time required by detection is reduced, and the detection efficiency is further improved.
Further, a vacuum pump 3 communicates with the inner cavity of the vacuum chamber 2. Because the vacuum chamber 2 needs to be opened when the aluminum alloy solution to be detected is put into the vacuum chamber 2, and air enters the vacuum chamber 2 when the vacuum chamber 2 is opened, the vacuum pump 3 is arranged, the vacuum chamber 2 is vacuumized through the vacuum pump 3, so that the vacuum chamber 2 can always keep a stable vacuum environment, the aluminum alloy solution to be detected can be solidified under a certain vacuum degree, the accuracy of a detection result is ensured, the quality of a casting is improved, the yield of the casting is improved, and the cost of the casting is reduced.
With continued reference to fig. 1, a heating and thermostatic mechanism 4 is provided on the table 1. The crucible 5 is provided at a heating position of the heating thermostat mechanism 4. In practical application, crucible 5 is used for placing the aluminium alloy solution that awaits measuring that takes out from the smelting pot, and because crucible 5 needs preheat to about 500 ℃ before using, therefore be provided with heating constant temperature mechanism 4 on workstation 1, so as to can preheat and keep warm crucible 5 at any time in the testing process, avoided still needing operating personnel to go other places or use other devices to realize preheating and keeping warm of crucible 5 in the testing process, the required time of hydrogen content detection in the aluminium alloy solution that awaits measuring has been saved, the detection efficiency is improved, further the efficiency of aluminium alloy casting has been improved.
In practical application, the density measuring mechanism 6 is provided on the table 1. In the testing process, in order to facilitate the hydrogen content to the aluminium alloy solution that awaits measuring at any time, generally place detection device in the workshop, and need measure the quality of aluminum alloy sample in the testing process, set up density measurement mechanism 6 on workstation 1, can measure the quality of aluminum alloy sample immediately after making the aluminum alloy sample, avoided operating personnel to measure the quality of aluminum alloy sample after making the aluminum alloy sample, still need remove other places and measure the aluminum alloy sample, the required time of detection has been saved, and the detection efficiency is improved. In addition, in the process that an operator holds an aluminum alloy sample to go to other places, the surface of the aluminum alloy sample is possibly polluted due to the fact that the distance is long, so that errors exist between the measured quality of the aluminum alloy sample and the actual quality, accuracy of a detection result is affected, the surface of the aluminum alloy sample needs to be cleaned before measurement in order to guarantee the accuracy of the detection result, detection time is prolonged, and detection efficiency is reduced.
The embodiment of the invention provides a detection device for hydrogen content in cast aluminum alloy, which comprises a workbench 1, a vacuum chamber 2, a vacuum pump 3, a heating constant temperature mechanism 4, a crucible 5, a density measurement mechanism 6 and a lifting mechanism 7. The vacuum chamber 2 includes a placing box 21 and a sealing cover 22. The placing box 21 is provided on the table 1. The sealing cover 22 is matched with the placing box 21 and used for covering the placing box 21. The fixed end of the lifting mechanism 7 is fixed on the workbench 1, and the telescopic end is connected with the sealing cover 22, so that the sealing cover 22 can be driven to be attached or far away from the placing box 21. The vacuum pump 3 is communicated with the inner cavity of the vacuum chamber 2. The heating and constant temperature mechanism 4 is arranged on the workbench 1. The crucible 5 is located at the heating position of the heating constant temperature mechanism 4. The density measuring mechanism 6 is provided on the table 1. In practical application, the crucible 5 is preheated, the aluminum alloy solution to be measured is taken out from the melting furnace and is rapidly placed into the crucible 5, the lifting mechanism 7 drives the sealing cover 22 to be far away from the placing box 21, then the crucible 5 is placed on the placing box 21, and the lifting mechanism 7 drives the sealing cover 22 to cover the placing box 21. Then, the vacuum pump 3 is opened to extract vacuum, so that the aluminum alloy solution is solidified under a certain vacuum degree to obtain an aluminum alloy sample, then the lifting mechanism 7 drives the sealing cover 22 to be far away from the placing box 21 to take out the aluminum alloy sample, finally, the density measuring mechanism 6 is used for measuring the mass of the aluminum alloy sample in the air and the water with known density respectively, the density value of the aluminum alloy sample is calculated according to the Archimedes principle, the density value of the aluminum alloy sample is compared with the optimal density value, whether hydrogen in the aluminum alloy solution to be measured is completely removed can be judged, and whether the aluminum alloy solution to be measured can be cast is judged. The detection device of the embodiment of the application can rapidly and accurately judge whether hydrogen in the aluminum alloy solution to be detected is removed completely, so that whether the aluminum alloy solution to be detected can be cast is judged, the quality of aluminum alloy castings is improved, the yield and the production rate of the castings are improved, and the casting cost is further reduced.
Specifically, the lifting mechanism 7 includes an electric push rod. The stiff end of electric putter is fixed on workstation 1, and flexible end is connected with sealed lid 22, can drive sealed lid 22 laminating or keep away from and place box 21. In practical application, when the aluminum alloy solution to be measured needs to be placed in the vacuum chamber 2, the electric push rod is controlled through the control system, the telescopic end of the electric push rod extends, so that the sealing cover 22 is driven to be away from the placing box 21 to open the vacuum chamber 2, and then the aluminum alloy solution to be measured is placed on the placing box 21. When the aluminum alloy solution to be measured is placed on the placing box 21, the telescopic end of the electric push rod is controlled to be shortened through the control system, so that the sealing cover 22 is driven to reset to fit the placing box 21 and further close the vacuum chamber 2. After the aluminum alloy solution to be measured is solidified into the aluminum alloy sample in the vacuum chamber 2, the aluminum alloy sample needs to be taken out for measurement, and the telescopic end of the electric push rod is controlled by the control system to extend, so that the sealing cover 22 is driven to be far away from the placing box 21 to open the vacuum chamber 2. Of course, the lifting mechanism 7 may also be a hydraulic cylinder or a pneumatic cylinder, the fixed end of the hydraulic cylinder or the pneumatic cylinder is fixed on the worktable 1, the telescopic end is connected with the sealing cover 22, and the sealing cover 22 can be driven to be attached to or far away from the placing box 21. The electric push rod has the advantages of large stroke range, large selectivity, simple operation and installation process and low cost.
Further, the detection device also comprises a three-dimensional control mechanism 10 and a clamping jaw 11. One end of the three-dimensional control mechanism 10 is arranged on the workbench 1, and the other end is connected with the clamping jaw 11, so that the clamping jaw 11 can be driven to clamp the crucible 5. Because the crucible 5 has a high temperature and the aluminum alloy solution has a high temperature, the hand of the operator cannot directly touch the outer wall of the crucible 5, otherwise the hand of the operator is scalded, and meanwhile, when the aluminum alloy solution to be measured is poured into the crucible 5, the aluminum alloy solution to be measured has a high temperature and can roll over without stop, the aluminum alloy solution can overflow or splash when being poured into the crucible 5, and the operator can easily scald the operator, so the crucible 5 can be clamped by using a clamp, in the process of clamping the crucible 5 by using the clamp, if the length of the clamp is set to be short, the aluminum alloy solution in the crucible 5 still overflows or splashes during the moving process, the hand of the operator can be scalded, and if the clamp is set to be long, the crucible 5 can fall due to unstable clamping, therefore, the three-dimensional control mechanism 10 and the clamping jaw 11 provided in the embodiment of the present application can realize the moving of the crucible 5, need not manual operation, degree of automation is high, and in addition, operating personnel can keep away from workstation 1 after putting into crucible 5 with the aluminium alloy solution that awaits measuring in the smelting furnace, and whole testing process factor of safety is high, has avoided operating personnel near-field ground contact crucible 5 and has caused the emergence of incident.
As shown in fig. 1, the three-dimensional control mechanism 10 includes a first telescopic structure 101, a second telescopic structure 102, and a third telescopic structure 103. The stiff end of first extending structure 101 is fixed on workstation 1, the flexible end can be followed the X axle direction extension of workstation 1 or shortened, the stiff end card of second extending structure 102 is established on workstation 1, the Z axle direction extension or the shortening of workstation 1 can be followed to flexible end, and the outer wall of the stiff end of second extending structure 102 is connected with the flexible end of first extending structure 101, so that when the flexible end of first extending structure 101 extends or shortens along the X axle direction of workstation 1, can drive the X axle direction motion of second extending structure 102 along workstation 1. The stiff end of third extending structure 103 is connected with the flexible end of second extending structure 102 to make the flexible end of second extending structure 102 extend or shorten along the Z axle direction of workstation 1, can drive the motion of third extending structure 103 along the Z axle direction of workstation 1, the flexible end of third extending structure 103 is connected with clamping jaw 11, can drive clamping jaw 11 and extend or shorten along the Y axle direction of workstation 1. In practical application, the clamping jaw 11 is driven to move along the X-axis direction, the Z-axis direction and the Y-axis direction of the workbench 1 in a three-dimensional mode through the cooperation of the first telescopic structure 101, the second telescopic structure 102 and the third telescopic structure 103, so that the clamping jaw 11 can move the crucible 5 from the heating constant-temperature mechanism 4 to the placing box 21, manual contact is not needed in the whole operation process, the safety of operators is guaranteed, and the labor cost is reduced.
In particular, the tightness of the grip of the jaws 11 is adjustable. In actual use, the clamping jaws 11 are used for clamping the crucible 5 and placed in the placing box 21, so that the clamping tightness of the clamping jaws 11 can be adjusted to enable the clamping jaws 11 to clamp the crucible 5 tightly, and the crucible 5 is prevented from falling off due to the movement of the three-dimensional control mechanism 10. If the clamping tightness of the clamping jaw 11 is not adjustable, in order to ensure that the crucible 5 does not fall, the inner wall of the clamping jaw 11 is matched with the outer wall of the crucible 5, so that the difficulty of clamping the crucible 5 by the clamping jaw 11 is increased, the control precision of the three-dimensional control mechanism 10 on the clamping jaw 11 is required to be higher, and the clamping tightness of the clamping jaw 11 is adjustable, so that the problem is solved well, the clamping jaw 11 is adjusted to be looser before the clamping jaw 11 clamps the crucible 5, and after the clamping jaw 11 contacts the outer wall of the crucible 5, the clamping jaw 11 is tightened to enable the clamping jaw 11 to clamp the crucible 5, so that the difficulty of clamping the crucible 5 by the clamping jaw 11 is reduced, and the reliability of clamping the crucible 5 by the clamping jaw 11 is improved.
Further, the method is carried out. The clamping jaw 11 comprises a fixed disc, a plurality of clamping jaws and a drive structure. The fixed disk is connected with the telescopic end of the third telescopic structure 103, a driving structure is arranged in the fixed disk, the clamping claws are clamped on the fixed disk, and the driving structure can control the clamping claws to slide along the direction vertical to the axis of the fixed disk, so that the clamping tightness of the clamping claw 11 can be adjusted. The tightness of the clamping jaw 11 can be adjusted according to the outer wall of the crucible 5, and the adjusting process is simple and convenient.
Continuing to refer to FIG. 1, the detection device further includes a rotating disk 12. One end of the rotating disc 12 is rotatably connected with the workbench 1, and the other end is connected with the lifting mechanism 7, so that the lifting mechanism 7 can be driven to rotate. In practical application, when the three-dimensional control mechanism 10 drives the clamping jaw 11 to place the crucible 5 in the placing box 21, if the sealing cover 22 is too close to the placing box 21, the crucible 5 is not easy to place in the placing box 21, and the rotating disk 12 can rotate around the axis of the rotating disk 12, so that the lifting mechanism 7 is driven to rotate, the lifting mechanism 7 can drive the sealing cover 22 to rotate around the lifting mechanism 7, so that the sealing cover 22 is far away from the placing box 21, and the crucible 5 is placed in the placing box 21 more easily.
Of course, if the lifting mechanism 7 lifts the sealing cover 22 high enough and the three-dimensional control mechanism 10 can control the clamping jaws 11 to be positioned under the sealing cover 22, the lifting mechanism 7 does not need to rotate.
In practical applications, the vacuum chamber 2 comprises stainless steel. Because stainless steel is higher in hardness and higher in wear resistance, the phenomenon that the vacuum chamber 2 is damaged does not need to be worried about even if slight collision exists in the detection process, and in addition, the detection cost is saved because the price of the aluminum alloy is lower.
In particular, the detection device further comprises a viewing window 221. The observation window 221 is provided on the sealing cover 22. The observation window 221 arranged on the sealing cover 22 is convenient for observing the solidification condition of the aluminum alloy solution to be measured placed in the vacuum chamber 2, so that the solidification process is more visual, and the aluminum alloy solution to be measured can be taken out in time after being completely solidified into an aluminum alloy sample for the next step.
Further, the density measuring mechanism 6 includes an electronic density balance. The electronic density balance has a calculation function, the density value of the aluminum alloy sample can be accurately and quickly calculated, the density value of the aluminum alloy sample is prevented from being calculated by using a calculator and other devices after the mass measurement of the aluminum alloy sample is completed, the detection difficulty is reduced, and the detection time is saved.
With continued reference to fig. 1, the detection device further includes a traveling mechanism 8. The traveling mechanism 8 is arranged at the bottom end of the workbench 1 and used for driving the workbench 1 to move. Because the aluminum alloy solution that needs the casting is located the smelting pot, and the smelting pot can be located different places, hope in the reality to detect immediately the hydrogen content in the aluminum alloy solution that takes out in the smelting pot before the aluminum alloy solution casting to avoid aluminum alloy solution to expose and lead to the aluminum alloy solution to solidify and influence the testing result for a long time in the air, in addition, set up running gear 8 and can avoid operating personnel incessantly to come and go between smelting pot and detection device and lead to wasting time and energy. But remove detection device and go smelting pot position department, obviously extremely inconvenient, when detection device was provided with running gear 8, can realize detection device's removal through promoting detection device to make detection device can move to smelting pot position department fast, and then convenient and fast realizes the detection of the hydrogen content of the aluminum alloy solution in the smelting pot. And because running gear 8's setting, one person also can accomplish detection device's removal, and whole removal process is simple laborsaving.
Further, still be provided with handle 9 on the outer wall of workstation 1, at detection device removal in-process, operating personnel can promote detection device in order to realize detection device's removal through holding handle 9, and operating personnel one hand also can accomplish detection device's removal for detection device's removal labour saving and time saving more.
Specifically, the embodiment of the application provides a construction method using the detection device for hydrogen content in cast aluminum alloy, which comprises the following steps:
when the hydrogen content of the aluminum alloy needs to be measured, the crucible 5 is preheated and kept warm by the heating constant temperature mechanism 4.
Taking out the aluminum alloy solution to be measured from the smelting furnace and quickly placing the aluminum alloy solution into the crucible 5.
The elevating mechanism 7 brings the sealing cover 22 away from the placing case 21.
The crucible 5 is placed on the placing box 21, and the lifting mechanism 7 drives the sealing cover 22 to be attached to the placing box 21.
And opening the vacuum pump 3 to extract vacuum, and solidifying the aluminum alloy solution under a certain vacuum degree to obtain an aluminum alloy sample.
The lifting mechanism 7 drives the sealing cover 22 to be far away from the placing box 21 so as to take out the aluminum alloy sample, and the mass of the aluminum alloy sample in the air is measured by using the density measuring mechanism 6.
The aluminum alloy test piece is immersed in water of known density, and the mass of the aluminum alloy test piece in the water is measured by using a density measuring mechanism 6.
And calculating the density value of the aluminum alloy sample according to the Archimedes principle. Comparing the density value with the optimal density value, and if the density value is close to the optimal density value, casting the aluminum alloy solution to be detected; and if the difference between the density value and the optimal density value is larger, continuously processing the aluminum alloy solution to be detected.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill 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; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.
Claims (10)
1. The detection device for the hydrogen content of the cast aluminum alloy is characterized by comprising a workbench (1), a vacuum chamber (2), a vacuum pump (3), a heating constant-temperature mechanism (4), a crucible (5), a density measurement mechanism (6) and a lifting mechanism (7);
the vacuum chamber (2) comprises a placing box (21) and a sealing cover (22);
the placing box (21) is arranged on the workbench (1);
the sealing cover (22) is matched with the placing box (21) and is used for covering the placing box (21);
the fixed end of the lifting mechanism (7) is fixed on the workbench (1), and the telescopic end is connected with the sealing cover (22) and can drive the sealing cover (22) to be attached to or away from the placing box (21);
the vacuum pump (3) is communicated with the inner cavity of the vacuum chamber (2);
the heating constant-temperature mechanism (4) is arranged on the workbench (1);
the crucible (5) is arranged at the heating position of the heating constant temperature mechanism (4);
the density measuring mechanism (6) is arranged on the workbench (1).
2. The detection device according to claim 1, characterized in that the lifting mechanism (7) comprises an electric push rod;
the fixed end of the electric push rod is fixed on the workbench (1), the telescopic end of the electric push rod is connected with the sealing cover (22), and the electric push rod can drive the sealing cover (22) to be attached or far away from the placing box (21).
3. The detection device according to claim 1, characterized by further comprising a three-dimensional control mechanism (10) and a clamping jaw (11);
one end of the three-dimensional control mechanism (10) is arranged on the workbench (1), and the other end of the three-dimensional control mechanism is connected with the clamping jaw (11) and can drive the clamping jaw (11) to clamp the crucible (5).
4. A testing device according to claim 3, characterized in that the tightness of the grip of the gripping jaws (11) is adjustable.
5. The detection device according to claim 4, characterized in that it further comprises a rotating disc (12);
one end of the rotating disc (12) is rotatably connected with the workbench (1), and the other end of the rotating disc is connected with the lifting mechanism (7) and can drive the lifting mechanism (7) to rotate.
6. The detection device according to claim 1, characterized in that the material of the vacuum chamber (2) comprises stainless steel.
7. The detection device according to claim 6, further comprising a viewing window (221);
the observation window (221) is provided on the sealing cover (22).
8. Detection device according to claim 1, characterized in that the density measuring means (6) comprise an electronic density balance.
9. The detection device according to claim 1, characterized by further comprising a walking mechanism (8);
the traveling mechanism (8) is arranged at the bottom end of the workbench (1) and used for driving the workbench (1) to move.
10. A method for using a device for detecting the hydrogen content of a cast aluminum alloy, which is characterized by comprising the following steps of:
when the hydrogen content of the aluminum alloy needs to be measured, preheating a crucible (5) through a heating constant-temperature mechanism (4) and preserving heat;
taking out the aluminum alloy solution to be detected from the smelting furnace and quickly placing the aluminum alloy solution into the crucible (5);
the lifting mechanism (7) drives the sealing cover (22) to be far away from the placing box (21);
the crucible (5) is placed on the placing box (21), and the lifting mechanism (7) drives the sealing cover (22) to be attached to the placing box (21);
opening a vacuum pump (3) to extract vacuum, and solidifying the aluminum alloy solution under a certain vacuum degree to obtain an aluminum alloy sample;
the lifting mechanism (7) drives the sealing cover (22) to be far away from the placing box (21) so as to take out the aluminum alloy sample, and the mass of the aluminum alloy sample in the air is measured by using the density measuring mechanism (6);
immersing the aluminum alloy test sample in water with known density, and measuring the mass of the aluminum alloy test sample in the water by using the density measuring mechanism (6);
calculating the density value of the aluminum alloy sample according to the Archimedes principle; comparing the density value with an optimal density value, and if the density value is close to the optimal density value, casting the aluminum alloy solution to be detected; and if the difference between the density value and the optimal density value is larger, continuously processing the aluminum alloy solution to be detected.
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| CN202111113214.6A CN113720731A (en) | 2021-09-23 | 2021-09-23 | Detection device for hydrogen content of cast aluminum alloy and use method thereof |
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| CN202111113214.6A CN113720731A (en) | 2021-09-23 | 2021-09-23 | Detection device for hydrogen content of cast aluminum alloy and use method thereof |
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