A flat tube nozzle contour size detection method and device based on optical projection measurement

Abstract

This invention relates to the field of flat nozzle inspection technology, specifically disclosing a method and apparatus for inspecting the external dimensions of flat nozzles based on optical projection measurement. The method includes a positioning plate and a placement plate. A polygonal groove is formed through the positioning plate, and multiple through holes are uniformly formed throughout the positioning plate. The placement plate is placed inside the polygonal groove and has a first slot formed through it. Multiple frame strips are detachably mounted on the top of the placement plate, and multiple positioning pins are uniformly detachably mounted on one side of each frame strip. This invention, by using a placement plate, frame strips, and positioning pins, allows the nozzle to be inspected to be quickly inspected by connecting the nozzle to the positioning pins, and then connecting the positioning pins to the frame strips, and finally connecting the frame strips to the placement plate and the positioning plate. This method not only increases the inspection speed of nozzles but also reduces the workload of operators.

Description

Technical Field

[0001] This invention relates to the field of flat nozzle inspection technology, and in particular to a method and apparatus for inspecting the external dimensions of flat nozzles based on optical projection measurement. Background Technology

[0002] A flat nozzle, also known as a "bore," is a short pipe connector installed at a circular opening, primarily used for connecting flared pipes. In the aerospace industry, flat nozzles are indispensable components in systems such as hydraulic conduits, used to connect main pipes to other components, such as valves and pumps. In process piping systems, flat nozzles also perform a core connection function, ensuring the stable operation of the piping system.

[0003] Before the flat nozzles are manufactured and put into storage, their dimensions need to be inspected to ensure the quality of the flat nozzles entering the warehouse. The traditional inspection method is for inspectors to use measuring tools to check and confirm the dimensions of the flat nozzles one by one. The inspection task is heavy, the labor intensity of continuous inspection is high, the inspection efficiency is low, the inspection cycle is long, and it is not conducive to ensuring the production delivery node. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method and apparatus for detecting the external dimensions of a flat nozzle based on optical projection measurement.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method and apparatus for detecting the external dimensions of a flat nozzle based on optical projection measurement includes a positioning plate and a placement plate. The positioning plate has a polygonal groove through it and multiple through holes evenly distributed throughout it. The placement plate can be placed inside the polygonal groove. The placement plate has a first slot through it. Multiple frame strips are detachably installed on the top of the placement plate, and multiple positioning pins are detachably installed on one side of each frame strip.

[0007] Preferably, multiple first openings are evenly provided on both sides of the placement plate, and second openings are provided through both ends of the top of the frame strip. The first openings and the second openings are connected and have the same diameter.

[0008] Preferably, a plug rod is inserted into the interior of the second opening, with the bottom of the plug rod extending into the interior of the first opening.

[0009] Preferably, the top of the insert extends above the top of the frame strip, and the top of the insert is connected to a second baffle, the bottom of the second baffle abutting against the top of the frame strip.

[0010] Preferably, the top of the second baffle is connected to a guide post, and the outer side of the guide post is provided with knurling.

[0011] Preferably, a plurality of mounting slots are evenly provided on one side of the frame strip, and a connecting mechanism is provided at the end of the positioning pin near the mounting slot, the connecting mechanism being connected to the mounting slot.

[0012] Preferably, the connecting mechanism includes a mounting rod, a first baffle, and a connecting rod. The mounting rod is inserted into the mounting groove, and the first baffle is installed at the end of the mounting rod away from the mounting groove. The connecting rod is installed on the side of the first baffle away from the mounting rod, and the end of the connecting rod near the positioning pin is connected to the positioning pin.

[0013] Preferably, the side of the first baffle closest to the frame bar abuts against the side wall of the frame bar, and the cross-sectional diameter of the connecting rod is larger than the cross-sectional diameter of the positioning pin.

[0014] Preferably, the side wall of the placement plate abuts against the inner wall of the polygonal groove, and the thickness of the placement plate is greater than the thickness of the positioning plate. When the insertion rod is inserted into the first opening and the second opening, the side wall of the insertion rod and the inner wall of the first opening and the second opening maintain a clearance fit of 0.01-0.02mm.

[0015] Preferably, a method for detecting the external dimensions of a flat nozzle based on optical projection measurement is applicable to the aforementioned detection device, and the method further includes the following detection steps:

[0016] Step 1: Secure the positioning plate to the desktop of the projection device by passing the fastening bolts through the through holes on the positioning plate, and place the placement plate into the polygonal groove of the positioning plate;

[0017] Step 2: Fit the nozzle to be tested onto the outside of the locating pin, and then install the locating pin with the nozzle fitted onto it into the mounting groove in the same way as the mounting rod is inserted to complete the installation of the locating pin on the frame strip.

[0018] Step 3: Place the frame strip on top of the placement plate, and insert the rod downwards from the top of the second opening, following the vertical downward orientation of the insertion rod, to complete the installation of the frame strip on the placement plate;

[0019] Step 4: Start the projection equipment to sequentially collect the projected outline of the nozzle and generate images. Through the operation of the projection inspection program, the projected outline dimensions of the nozzle are compared with the preset standard dimensions, and the comparison results are output. Data on qualified and out-of-tolerance dimensions are output. At the same time, the system will identify specific out-of-tolerance products so that the inspection personnel can promptly pick out unqualified products, and finally complete the inspection of the flat nozzle's outline dimensions.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In this invention, by setting up a placement plate, a frame strip, and a positioning pin, the nozzle to be tested is fitted onto the positioning pin, and then the positioning pin is connected to the frame strip, and the frame strip is connected to the placement plate and the positioning plate. This allows the projection inspection device to quickly inspect the nozzle. This operation method not only increases the inspection speed of the nozzle, but also reduces the workload of the staff.

[0022] In this invention, by setting a polygonal groove, the placement plate is placed in the polygonal groove. When the side of the placement plate abuts against the inner wall of the polygonal groove, the placement plate can be quickly positioned. Moreover, the design of the polygonal groove allows the placement plate of different sizes to be used.

[0023] In this invention, by setting guide posts and insert rods, and by inserting the insert rods into the first opening and the second opening, the frame strip can be quickly assembled and disassembled on the placement plate. This allows the operator to remove the frame strip and install the positioning pin with the nozzle on the frame strip, increasing the ease of use of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a top view of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the positioning plate structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the placement plate structure of the present invention;

[0028] Figure 5 This is a side view of the frame structure of the present invention;

[0029] Figure 6 This is a top view of the frame structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the mounting structure of the positioning pin and mounting rod of the present invention;

[0031] Figure 8 This is a schematic cross-sectional view of the nozzle component of the present invention;

[0032] Figure 9 This is a schematic diagram of the guide post and insertion rod installation structure of the present invention.

[0033] In the diagram: 1. Positioning plate; 2. Placement plate; 3. Frame strip; 4. Positioning pin; 5. Guide post; 6. Through hole; 7. Polygonal groove; 8. First opening; 9. Mounting groove; 10. Second opening; 11. Mounting rod; 12. First baffle; 13. Connecting rod; 14. Nozzle fitting; 16. Second baffle; 17. Insert rod; 18. First groove. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figures 1-9 A method and apparatus for detecting the external dimensions of a flat nozzle based on optical projection measurement is disclosed. The apparatus includes a positioning plate 1 and a placement plate 2. A polygonal groove 7 is formed through the positioning plate 1, and multiple through holes 6 are uniformly formed through the positioning plate 1. The placement plate 2 can be placed inside the polygonal groove 7. A first slot 18 is formed through the placement plate 2. Multiple frame strips 3 are detachably installed on the top of the placement plate 2, and multiple positioning pins 4 are uniformly detachably installed on one side of each frame strip 3. By fixing the positioning plate 1 to the desktop of the projection equipment, the panel of the projection equipment can be protected, preventing damage to the glass of the projection equipment panel when the frame strips 3 are handled. Simultaneously, the positioning plate 1 is also used to fix the placement plate 2 on the projection equipment surface, facilitating the subsequent collection of projection dimension data for the nozzle component 14. The projection equipment can perform projection detection of the nozzle component 14 by passing through the polygonal groove 7 and the first slot 18.

[0036] As a technical optimization of the present invention, multiple first openings 8 are evenly provided on both sides of the placement plate 2, and second openings 10 are provided through both ends of the top of the frame strip 3. The first openings 8 and the second openings 10 are connected, and the diameters of the first openings 8 and the second openings 10 are the same. By connecting the first openings 8 and the second openings 10, the insertion rod 17 can pass through the first openings 8 and the second openings 10 to fix the frame strip 3 on the placement plate 2.

[0037] As a technical optimization of the present invention, a plug rod 17 is inserted into the interior of the second opening 10, and the bottom of the plug rod 17 extends into the interior of the first opening 8. The frame strip 3 is fixed on the placement plate 2 by the plug rod 17 passing through the first opening 8 and the second opening 10.

[0038] As a technical optimization of the present invention, the top of the insertion rod 17 extends above the top of the frame strip 3, and a second baffle 16 is connected to the top of the insertion rod 17, with the bottom of the second baffle 16 abutting against the top of the frame strip 3. The installation position of the insertion rod 17 is defined by the second baffle 16 abutting against the frame strip 3.

[0039] As a technical optimization of the present invention, a guide post 5 is connected to the top of the second baffle 16, and the outer side of the guide post 5 is provided with knurling. The knurling on the outer side of the guide post 5 can increase the friction, making it easier for workers to install and remove the insertion rod 17 by holding the guide post 5.

[0040] As a technical optimization of the present invention, a plurality of mounting slots 9 are evenly provided on one side of the frame strip 3, and a connecting mechanism is provided at the end of the positioning pin 4 near the mounting slot 9, and the connecting mechanism is connected to the mounting slot 9. The positioning pin 4 can be installed on the frame strip 3 by installing it in the mounting slot 9 through the connecting mechanism.

[0041] As a technical optimization of the present invention, the connecting mechanism includes a mounting rod 11, a first baffle 12, and a connecting rod 13. The mounting rod 11 is inserted into the mounting groove 9. The first baffle 12 is installed at the end of the mounting rod 11 away from the mounting groove 9. The connecting rod 13 is installed on the side of the first baffle 12 away from the mounting rod 11. The end of the connecting rod 13 near the positioning pin 4 is connected to the positioning pin 4. By inserting the mounting rod 11 into the mounting groove 9, the positioning pin 4 and the frame strip 3 can be connected. The first baffle 12 abutting against the frame strip 3 can limit the installation position of the mounting rod 11. The connecting rod 13 can limit the position of the nozzle 14 installed outside the positioning pin 4.

[0042] As a technical optimization of the present invention, the side of the first baffle 12 closest to the frame strip 3 abuts against the side wall of the frame strip 3, and the cross-sectional diameter of the connecting rod 13 is larger than the cross-sectional diameter of the positioning pin 4. This dimensional setting allows for the positioning of the nozzle 14 installed outside the positioning pin 4.

[0043] As a technical optimization of the present invention, the side wall of the placement plate 2 abuts against the inner wall of the polygonal groove 7, and the thickness of the placement plate 2 is greater than the thickness of the positioning plate 1. When the insertion rod 17 is inserted into the first opening 8 and the second opening 10, the side wall of the insertion rod 17 and the inner wall of the first opening 8 and the second opening 10 maintain a clearance fit of 0.01-0.02mm on one side. This clearance fit installation method facilitates the installation and removal of the insertion rod 17 inside the first opening 8 and the second opening 10. By placing the placement plate 2 in the polygonal groove 7, the side of the placement plate 2 abuts against the inner wall of the polygonal groove 7, which can quickly position the placement plate 2. Moreover, the design of the polygonal groove 7 allows the positioning plate 1 to use placement plates 2 of different sizes.

[0044] As a technical optimization of the present invention, a method for detecting the external dimensions of a flat nozzle based on optical projection measurement is provided. This method is applicable to the aforementioned detection device and further includes the following detection steps:

[0045] Step 1: Fix the positioning plate 1 to the desktop of the projection device by passing the fastening bolts through the through holes 6 on the positioning plate 1, and place the placement plate 2 into the polygonal groove 7 of the positioning plate 1.

[0046] Step 2: Fit the nozzle part 14 to be tested onto the outside of the positioning pin 4, and then install the positioning pin 4 with the nozzle part 14 fitted onto it into the mounting groove 9 by inserting the mounting rod 11 into it to complete the installation of the positioning pin 4 on the frame strip 3.

[0047] Step 3: Place the frame strip 3 above the placement plate 2, and insert the rod 17 downwards from the top of the second opening 10, so as to complete the installation of the frame strip 3 on the placement plate 2.

[0048] Step 4: Start the projection equipment to sequentially collect the projected outline of the nozzle 14 and generate images. Through the operation of the projection detection program, the projected outline dimensions of the nozzle 14 are compared with the preset standard dimensions and the comparison results are output. Data on qualified and out-of-tolerance dimensions are output. At the same time, the system will identify the specific out-of-tolerance products so that the inspection personnel can pick out the unqualified products in time. Finally, the inspection of the flat nozzle's outline dimensions is completed.

[0049] In use, the positioning plate 1 is fixedly installed on the desktop of the projection device by passing the fastening bolt through the through hole 6 on the positioning plate 1. The projection device is a mature existing technology, so it will not be described in detail. Then, the staff places the placement plate 2 into the polygonal groove 7 of the positioning plate 1.

[0050] Next, the staff will attach the nozzle 14 to be tested to the outside of the positioning pin 4. When the end of the nozzle 14 near the connecting rod 13 abuts against the end wall of the connecting rod 13, the installation of the nozzle 14 on the outside of the positioning pin 4 is completed. Then, the positioning pin 4 with the nozzle 14 attached is installed into the mounting groove 9 in the manner of inserting the mounting rod 11 until the side wall of the first baffle 12 abuts against the side wall of the frame strip 3, the installation of the positioning pin 4 on the frame strip 3 is completed.

[0051] After all the mounting slots 9 on a frame strip 3 are fitted with locating pins 4 that are fitted with nozzle fittings 14, the worker moves the frame strip 3 above the placement plate 2 and follows the instructions. Figure 2The frame strip 3 is placed as shown. When the frame strip 3 is placed, the first opening 8 and the second opening 10 are aligned with the central axis. At this time, the worker holds the guide post 5 and inserts the insertion rod 17 vertically downward from the top of the second opening 10 until the side of the second baffle 16 abuts against the top of the frame strip 3. The insertion rod 17 also extends into the interior of the first opening 8. The frame strip 3 is installed on the placement plate 2 in this way. The frame strip 3 can be installed in sequence by following the above operation.

[0052] Subsequently, the projection equipment is activated to sequentially acquire the projected outline of the nozzle component 14 and generate images. Through the operation of the projection detection program, the projected outline dimensions of the nozzle component 14 can be compared with the preset standard outline dimensions and the comparison results can be output. Then, the data of qualified and out-of-tolerance dimensions are output. At the same time, the system will identify the specific out-of-tolerance products so that the inspection personnel can promptly pick out the unqualified products, and finally complete the inspection of the flat nozzle outline dimensions.

[0053] When the nozzle 14 is fitted onto the outside of the locating pin 4, the outer wall of the locating pin 4 and the inner wall of the nozzle 14 maintain a clearance fit of 0.01-0.02mm on one side. This arrangement facilitates the installation and removal of the nozzle 14 on the locating pin 4.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting the external dimensions of a flat nozzle based on optical projection measurement, comprising a positioning plate (1) and a placement plate (2), characterized in that, The positioning plate (1) has a polygonal groove (7) through it, and multiple through holes (6) are evenly opened through it. The placement plate (2) can be placed inside the polygonal groove (7). The placement plate (2) has a first slot (18) through it. Multiple frame strips (3) are detachably installed on the top of the placement plate (2). Multiple positioning pins (4) are evenly detachably installed on one side of the frame strips (3). The placement plate (2) has multiple first openings (8) evenly opened on both sides, and the top two ends of the frame strip (3) have second openings (10) through them. The first openings (8) and the second openings (10) are connected, and the diameters of the first openings (8) and the second openings (10) are the same. A plug rod (17) is inserted into the interior of the second opening (10), and the bottom of the plug rod (17) extends into the interior of the first opening (8); The top of the insert (17) extends above the top of the frame strip (3), and the top of the insert (17) is connected to a second baffle (16), the bottom of the second baffle (16) abutting against the top of the frame strip (3); The top of the second baffle (16) is connected to a guide post (5), and the outer side of the guide post (5) is provided with knurling. Multiple mounting slots (9) are evenly provided on one side of the frame strip (3), and a connecting mechanism is provided at the end of the positioning pin (4) near the mounting slot (9), and the connecting mechanism is connected to the mounting slot (9); The connecting mechanism includes a mounting rod (11), a first baffle (12), and a connecting rod (13). The mounting rod (11) is inserted into the mounting groove (9). The first baffle (12) is installed at the end of the mounting rod (11) away from the mounting groove (9). The connecting rod (13) is installed on the side of the first baffle (12) away from the mounting rod (11). The end of the connecting rod (13) near the positioning pin (4) is connected to the positioning pin (4).

2. The device for detecting the external dimensions of a flat nozzle based on optical projection measurement according to claim 1, characterized in that, The first baffle (12) abuts against the side wall of the frame (3) on the side closest to the frame (3), and the cross-sectional diameter of the connecting rod (13) is greater than the cross-sectional diameter of the positioning pin (4).

3. The device for detecting the external dimensions of a flat nozzle based on optical projection measurement according to claim 2, characterized in that, The side wall of the placement plate (2) abuts against the inner wall of the polygonal groove (7), and the thickness of the placement plate (2) is higher than the thickness of the positioning plate (1). When the insertion rod (17) is inserted into the first opening (8) and the second opening (10), the side wall of the insertion rod (17) and the inner wall of the first opening (8) and the second opening (10) maintain a single-sided clearance fit of 0.01-0.02mm.

4. A method for detecting the external dimensions of a flat nozzle based on optical projection measurement, characterized in that, This detection method is applicable to the detection device of claim 3 above, and the detection method includes the following detection steps: Step 1: Fix the positioning plate (1) on the desktop of the projection device by passing the fastening bolt through the through hole (6) on the positioning plate (1), and place the placement plate (2) into the polygonal groove (7) of the positioning plate (1); Step 2: Fit the nozzle part (14) to be tested onto the outside of the positioning pin (4), and then install the positioning pin (4) fitted with the nozzle part (14) into the mounting groove (9) in the same way as the mounting rod (11) to complete the installation of the positioning pin (4) on the frame strip (3); Step 3: Take the frame strip (3) above the placement plate (2), and insert the rod (17) downward from the top of the second opening (10) in the vertical downward position to complete the installation of the frame strip (3) on the placement plate (2); Step 4: Start the projection equipment to collect the outline of the nozzle (14) and generate an image. Through the operation of the projection detection program, the outline size of the nozzle (14) detected by projection is compared with the preset standard outline size and the comparison results are output. The output data of qualified and out-of-tolerance size are output. At the same time, the system will identify the specific out-of-tolerance products so that the inspection personnel can pick out the unqualified products in time. Finally, the inspection of the outline size of the flat nozzle is completed.

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