Casting processing airtightness detection device
By designing the casting processing airtight detection device and using optical detection and automatic locking technology, the problem of difficulty in accurately positioning the leakage points of the casting in the prior art is solved, and the possibility of rapid and accurate leakage point positioning and subsequent improvements are achieved.
Patent Information
- Application Number
- CN202411637982.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-15
- Publication Date
- 2025-02-14
AI Technical Summary
The prior art is difficult to accurately locate defect leakage points on castings, resulting in the later maintenance personnel spending a lot of time to find the leakage location, and the inability to target the casting process and mold design.
A casting processing airtight detection device is designed, including a detection rack, a sealing cover, an air injection assembly, an optical detection unit, a gimbal and a controller. By injecting colored detection gas into the inside of the casting, the gas leakage point is detected by an optical detection unit, and the leakage point is automatically locked through the gimbal and the lamp ring positioning member.
It realizes rapid and accurate positioning of the leakage points of the castings, reduces manual search errors, improves positioning accuracy, and provides a foundation for subsequent casting processes and mold design improvements.
Smart Images
Figure CN119437577A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of casting detection, in particular to a casting processing airtight detection device. Background Art
[0002] Castings are metal molded objects obtained by various casting methods, that is, liquid metal is injected into a pre-prepared mold, and after it is cooled and solidified, the resulting parts have a certain shape, size and performance. In order to ensure that the castings will not leak during use and to ensure their quality and performance, the air tightness of the castings is generally tested during or after the casting process. The current common air tightness detection method mainly includes the bubble method, which immerses the casting in water or other liquids, and then fills the casting with gas. If gas leaks from the casting, bubbles will form in the liquid. However, the bubble method has a slow detection efficiency, and if the leakage point is small, the bubbles produced are also small, which is not easy to observe. Therefore, the current common detection method is the pressure detection method, which is to fill a certain pressure of gas into the casting, and then observe the pressure changes. If the pressure drops rapidly, it means that the casting has a leak.
[0003] However, when the pressure method is currently used for testing, although it is possible to quickly detect whether there are defective holes based on the change in air pressure, it is impossible to know the specific location of the defect on the casting. For later maintenance personnel, it may take a lot of time to find the leakage location when performing repairs, and it is impossible to make targeted improvements to the casting process, mold design, etc. in subsequent casting.
[0004] Based on the above situation, we propose a casting processing airtightness detection device to solve the above problems. Summary of the invention
[0005] The invention provides a casting processing airtightness detection device to solve the problem in the prior art that it is inconvenient to locate and find defective leakage points on the casting.
[0006] The technical problem solved by the present invention is achieved by adopting the following technical solutions: A casting processing airtight detection device comprises a detection frame, wherein the detection frame is provided with a casting placement groove for placing a casting workpiece, and the interior of the casting placement groove is provided with a plurality of plugging parts for sealing leakage holes in the casting workpiece. The device also comprises a closing cover, a gas injection assembly, an optical detection unit, a pan-tilt head and a controller. The closing cover is connected to the top inner wall of the detection frame through a telescopic member, and is used to drive the closing cover to move downward and contact the detection frame to cover the casting workpiece in a closed space. The gas injection assembly is used to inject a specific colored detection gas into the interior of the casting workpiece. The optical detection unit is arranged inside the closing cover, and is used to detect the color change of the casting workpiece surface caused by gas leakage, and convert the optical signal into an electrical signal. The pan-tilt head is installed inside the closing cover, and the pan-tilt head is connected to the optical detection unit. A light ring positioning member is also provided on the pan-tilt head, which is used to lock the leakage point on the casting workpiece. The controller is used to control the action of the pan-tilt head and the light ring positioning member after receiving the signal from the optical detection unit.
[0007] Preferably, it also includes an air pressure sensor, which is installed on the gas injection component and is used to detect the output air pressure of the gas injection component.
[0008] Preferably, it also includes a general warning component electrically connected to the controller, and when the air pressure threshold of the air injection component detected by the air pressure sensor exceeds a set range, the controller controls the general warning component to sound an alarm.
[0009] Preferably, the optical detection unit is composed of a plurality of optical sensors, and the plurality of optical sensors are distributed at different positions of the casting workpiece to fully cover the surface of the casting workpiece.
[0010] Preferably, the controller includes a signal receiving module, a data analysis module and an execution instruction sending module. The signal receiving module is used to receive the electrical signals sent by the optical detection unit and the air pressure sensor. The data analysis module is used to analyze and process the electrical signals received from the signal receiving module to determine the leakage situation and leakage-related parameters. The execution instruction sending module is used to send corresponding control instructions to the main warning part, the light ring positioning part and the gimbal according to the analysis results.
[0011] Preferably, the light ring positioning member comprises a light ring that can emit light of a specific color, the color of which is clearly distinguishable from the color of the detected gas, and the brightness and light emission mode of the light ring positioning member are adjustable.
[0012] Preferably, it further comprises an alarm unit electrically connected to the controller, wherein the alarm unit comprises a plurality of alarms, and the plurality of alarms correspond one-to-one to the plurality of optical sensors.
[0013] Preferably, a shielding cover is provided on the pan-tilt platform, and the shielding cover is located between the light ring positioning member and the optical detection unit, and is used for shielding the light of the light ring positioning member.
[0014] Preferably, a filter is provided on the outer wall of the closed cover.
[0015] The beneficial effect of the present invention is that after the colored detection gas is injected into the casting workpiece through the gas injection assembly, the optical detection unit can detect the color change on the surface of the casting workpiece caused by gas leakage. After the optical detection unit detects that the colored gas has leaked from the casting workpiece, the controller controls the light ring positioning part to illuminate the leakage point of the workpiece, and the leakage point is automatically locked, providing the operator with an intuitive leakage position indication, avoiding the error of manually finding the leakage point, and further improving the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0017] Figure 1 An isometric structural schematic diagram provided by the present invention; Figure 2 A schematic diagram of a cross-sectional structure provided by the present invention; Figure 3 A schematic diagram of the structure of the gas injection assembly provided by the present invention; Figure 4 It is a schematic diagram of the connection structure between the pan / tilt head and the optical sensor of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the detection frame in the present invention; Figure 6 It is a schematic diagram of the structure of the optical detection unit installed inside the closed cover in the present invention; Figure 7 The principle framework provided by the present invention Figure 1 ; Figure 8 The principle framework provided by the present invention Figure 2 ; Fig. 9 The principle framework provided by the present invention Figure 3 .
[0018] In the figure, 1. detection frame; 11. casting placement slot; 12. blocking piece; 2. closing cover; 21. filter; 22. telescopic piece; 3. casting workpiece; 4. gas injection assembly; 41. air pressure sensor; 42. gas cylinder; 43. air pump; 5. pan / tilt; 51. shielding cover; 6. light ring positioning piece; 7. controller; 71. signal receiving module; 72. data analysis module; 73. execution instruction sending module; 74. alarm; 8. general warning piece; 9. optical sensor. DETAILED DESCRIPTION
[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.
[0020] Reference Figure 1-Figure 9 As shown, a casting processing airtightness detection device comprises a detection frame 1, a casting placement groove 11 for placing a casting workpiece 3 is provided on the detection frame 1, a plurality of plugging members 12 for plugging the leakage holes of the casting workpiece 3 are provided inside the casting placement groove 11, and the plugging members 12 can be driven by a telescopic rod to plug the slots and the like on the casting workpiece 3, and also comprises a closing cover 2, the closing cover 2 is connected to the top inner wall of the detection frame 1 through a telescopic member 22, and is used to drive the closing cover 2 to move downward and contact with the detection frame 1 to cover the casting workpiece 3 in a closed space, the closing cover 2 is provided with a plugging member 12 inside to plug the upper end of the casting, and the position of the plugging member 12 is set according to the shape specification of the casting workpiece 3 to ensure that each plugging member 12 corresponds to a slot that needs to be plugged, and an air injection component 4 is provided on the closing cover 2, and the air injection component 4 is used to A specific colored detection gas is injected into the casting workpiece 3. After the casting workpiece 3 is sealed by the sealing piece 12, the sealing cover 2 moves downward under the action of the telescopic piece 22. The telescopic piece 22 can also be an electric telescopic rod, etc., to seal and cover the casting workpiece 3. At this time, a certain pressure of colored detection gas, such as yellow or blue gas, is injected into the casting workpiece 3 by opening the gas injection component 4. Once colored gas emerges from the casting workpiece 3, it indicates that there is a leakage point in the casting workpiece 3. The gas injection component 4 may include a gas cylinder 42 for containing colored gas and an air pump 43 provided on the gas cylinder output pipe. The gas cylinder output pipe can extend to the sealing piece 12 at the upper end of the casting workpiece 3. When the upper end sealing piece 12 completes the sealing of the casting workpiece 3, the output pipe of the gas cylinder 42 is located inside the casting workpiece 3, and the gas injection work can be carried out.
[0021] An optical detection unit for detecting color changes on the surface of the casting workpiece 3 caused by gas leakage and converting optical signals into electrical signals, and a pan-tilt head 5 installed inside the closing cover 2 are also provided inside the closing cover 2, and the pan-tilt head 5 is connected to the optical detection unit. When colored gas leaks from the casting workpiece 3, the concentration of the colored gas around the leakage point increases, and the optical detection unit can capture the light signal changes corresponding to the color changes, and convert the optical signals into electrical signals and transmit them to the controller 7 electrically connected thereto. The controller 7 controls the movement of the pan-tilt head 5, and a light ring positioning member 6 for locking the leakage point on the casting workpiece 3 is provided on the pan-tilt head 5, so that the light ring positioning member 6 is aligned with the casting workpiece 3, and the light ring positioning member 6 is driven by the controller 7 to open and lock the leakage point, so as to facilitate the subsequent search for the positioning point.
[0022] Furthermore, the light ring positioning member 6 includes a light ring that can emit light of a specific color, and its color is clearly distinguishable from the color of the detected gas. For example, if the color of the detected gas is yellow, the light ring can be red, etc., so as to distinguish and avoid affecting the optical detection unit, and the brightness and light emission mode of the light ring positioning member 6 are adjustable so as to be adjusted according to different detection requirements, and the adaptability range is wider.
[0023] Reference Figure 4 As shown, further, a shielding cover 51 is provided on the pan / tilt 5, and the shielding cover 51 is located between the light ring positioning member 6 and the optical detection unit, and is used to shield the light of the light ring positioning member 6. From the time when the optical detection unit detects the leakage of colored gas and stops working to the time when the light ring positioning member 6 is fully opened, or from the time when the light ring positioning member 6 is closed to the time when the optical detection unit resumes working, there may be a short signal overlap or interference. The shielding cover can be used as an additional protective measure to reduce the influence of the light of the light ring on the optical detection unit in this case, and improve the detection accuracy.
[0024] Among them, refer to Figure 3 As shown, an air pressure sensor 41 is also provided on the gas injection component 4, which is used to detect the output air pressure of the gas injection component 4. According to different detection requirements for the casting workpiece 3, pressurized gas may need to be injected. The air pressure sensor 41 can detect the injected gas pressure in real time. At the same time, after a certain pressure gas is injected into the casting workpiece 3, if the air pressure sensor 41 detects that the air pressure change at this time fluctuates within a certain range, it can be preliminarily judged that there is no leakage in the casting workpiece 3 or the leakage point is small. When the value detected by the air pressure sensor 41 is lower than the set range, it may indicate that a large leakage point appears in the casting workpiece 3. At this time, the air pressure sensor 41 can transmit a signal to the controller 7, and the controller 7 controls the general warning component 8 electrically connected thereto to sound an alarm, prompting personnel that there is a large leakage point in this casting workpiece 3, and stop the subsequent routine detection process to avoid wasting time. The casting workpiece 3 can be directly taken out for manual search for the leakage point.
[0025] Further, see Figure 6 As shown, the optical detection unit is composed of a plurality of optical sensors 9, and the plurality of optical sensors 9 are distributed at different positions of the casting workpiece 3 to fully cover the surface of the casting workpiece 3. By arranging a plurality of optical sensors 9 at different positions, each surface of the casting workpiece 3 can be fully monitored. No matter where the leakage point appears in the casting, it is very likely to be captured by at least one optical sensor 9. At the same time, the distribution of the plurality of optical sensors 9 can be optimized and adjusted according to the specific shape and size of the casting workpiece 3 to ensure that comprehensive detection coverage can be achieved regardless of the shape of the casting.
[0026] Among them, the controller 7 includes a signal receiving module 71 for receiving the electrical signals sent by the optical detection unit and the air pressure sensor 41, a data analysis module 72 for analyzing and processing the electrical signals received from the signal receiving module 71 to determine the leakage situation and leakage-related parameters, and an execution instruction sending module 73 for sending corresponding control instructions to the general warning component 8, the light ring positioning component 6 and the pan-tilt head 5 according to the analysis results. When the controller 7 receives the electrical signals sent by the optical detection unit and the air pressure sensor 41, it will be stored in the signal receiving module 71, and the data analysis module 72 will be analyzed and processed, and then the execution instruction sending module 73 will make a driving execution instruction to control the general warning component 8 to sound an alarm and the light ring positioning component 6 to open to lock the leakage point.
[0027] Furthermore, it also includes a warning unit electrically connected to the controller 7, the warning unit includes multiple alarms 74, and the multiple alarms 74 correspond one-to-one to the multiple optical sensors 9. For example, the number of optical sensors 9 is 10, which are distributed at 10 different locations for detection. Then the number of alarms 74 is also 10, and corresponds to the 10 optical sensors 9. When one of the optical sensors detects a leak, the controller 7 will turn on the corresponding alarm 74. At this time, it can be known where the optical sensor 9 detects the leak, so that the leak can be found more conveniently.
[0028] Among them, a filter 21 is provided on the outer wall of the closed cover 2. The filter 21 can be a filter 21 of a specific wavelength, etc., which only allows light of a specific wavelength to pass through and blocks light of other wavelengths. If the color of the detected gas corresponds to a specific wavelength range, a filter 21 matching it can be selected. For example, if the leaked gas is yellow, a filter 21 that only allows yellow light wavelengths to pass through can be selected. This can enhance the observation effect of the green leaked gas, while blocking most of the other wavelengths of light in the ambient light, reducing interference with the internal optical sensor 9, and further improving the optical detection unit's detection of leakage points on the surface of the casting workpiece 3.
[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A casting processing airtightness detection device, comprising a detection frame (1), wherein the detection frame (1) is provided with a casting placement groove (11) for placing a casting workpiece (3), wherein a plurality of plugging members (12) are provided inside the casting placement groove (11) for plugging leak holes of the casting workpiece (3), wherein: Also includes; A closed cover (2), the closed cover (2) being connected to the top inner wall of the detection frame (1) via a telescopic member (22) and being used to drive the closed cover (2) to move downward to contact the detection frame (1) and cover the casting workpiece (3) in a closed space; A gas injection component (4), the gas injection component (4) being used to inject a specific colored detection gas into the interior of the casting workpiece (3); An optical detection unit, arranged inside the closed cover (2), used to detect color changes on the surface of the casting workpiece (3) caused by gas leakage and converting optical signals into electrical signals; A pan / tilt platform (5), the pan / tilt platform (5) being installed inside the closed cover (2), the pan / tilt platform (5) being connected to the optical detection unit, and the pan / tilt platform (5) being further provided with a light ring positioning member (6) for locking a leakage point on the casting workpiece (3); A controller (7), wherein the controller (7) is used to control the movement of the pan / tilt platform (5) and the light ring positioning member (6) after receiving a signal from the optical detection unit.
2. A casting processing airtightness detection device according to claim 1, characterized in that: It also includes an air pressure sensor (41), which is mounted on the air injection component (4) and is used to detect the output air pressure of the air injection component (4).
3. A casting processing airtightness detection device according to claim 2, characterized in that: It also includes a general warning component (8) electrically connected to the controller (7), and when the air pressure threshold of the air injection component (4) detected by the air pressure sensor (41) exceeds a set range, the controller (7) controls the general warning component (8) to sound an alarm.
4. A casting processing airtightness detection device according to claim 1, characterized in that: The optical detection unit is composed of a plurality of optical sensors (9), and the plurality of optical sensors (9) are distributed at different positions of the casting workpiece (3) to fully cover the surface of the casting workpiece (3).
5. The casting processing airtightness detection device according to claim 3, characterized in that: The controller (7) comprises: A signal receiving module (71), the signal receiving module (71) being used to receive electrical signals sent by the optical detection unit and the air pressure sensor (41); A data analysis module (72), the data analysis module (72) being used to analyze and process the electrical signal received from the signal receiving module (71) to determine leakage conditions and leakage-related parameters; An execution instruction sending module (73) is used to send corresponding control instructions to the general warning member (8), the light ring positioning member (6) and the pan / tilt platform (5) according to the analysis result.
6. A casting processing airtightness detection device according to claim 1, characterized in that: The light ring positioning member (6) comprises a light ring that can emit light of a specific color, the color of which is clearly distinguishable from the color of the detected gas, and the brightness and light emission mode of the light ring positioning member (6) are adjustable.
7. A casting processing airtightness detection device according to claim 1, characterized in that: It also includes a warning unit electrically connected to the controller (7), the warning unit including a plurality of alarms (74), and the plurality of alarms (74) correspond one-to-one to the plurality of optical sensors (9).
8. A casting processing airtightness detection device according to claim 1, characterized in that: A shielding cover (51) is provided on the pan / tilt platform (5); the shielding cover (51) is located between the light ring positioning member (6) and the optical detection unit, and is used to shield the light of the light ring positioning member (6).
9. The casting processing airtightness detection device according to claim 1, characterized in that: A filter (21) is provided on the outer wall of the closed cover (2).