A large integrated die casting flip manual inspection system

Abstract

The present invention relates to the field of die-casting detection technology, and discloses a large-scale integrated die-casting flip-type manual detection system, including a fixed frame, a front lifting fence module, a flip module, a driving slide rail, a rear lifting fence module, a lifting structure, a laser radar module and an analysis computer module; the flip module is used to fix the die-casting and flip the fixed die-casting to an angle perpendicular to the laser radar module. The present invention fixes the die-casting above the flip module, and after the manual inspection is qualified, the driving slide rail is used to transfer it to the inside of the fixed frame, and then the flip module flips the die-casting to an angle perpendicular to the laser radar module, and then the laser radar is started to perform a more detailed scanning and detection of the die-casting. This scanning and detection method can maximize the guarantee that the die-casting will not be affected by the external environment during the detection process.

Description

Technical Field

[0001] The invention relates to the technical field of die casting detection, and in particular to a large-scale integrated die casting flip-type manual detection system. Background Art

[0002] Die castings are metal castings made by die casting. Die casting is a casting method that injects molten metal (usually aluminum, zinc, copper alloy, etc.) into a high-precision mold and solidifies it under high pressure. This process can produce parts with complex shapes, high precision and high surface quality, and is widely used in industries such as automobiles, electronics, aviation, and home appliances.

[0003] After the production of die castings, strict quality inspection is required before they can be put into actual use. The quality inspection of die castings includes the inspection of surface defects, scratches and scars.

[0004] The existing patent discloses a die-casting appearance inspection system, method and electronic equipment (publication number CN114577165A). In the technology disclosed in the patent, the die-casting is photographed by a camera to determine whether there is a quality problem. However, the scratches on the die-casting present different colors at different optical angles, so the inspection process needs to be carried out in a sealed environment, otherwise it is easily affected by external light. In addition, in the technology disclosed in the patent, the impact of scratches on precision is difficult to quantify, which makes it difficult to further improve the accuracy of die-casting quality inspection. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a large-scale integrated die casting flip-type manual inspection system, which solves the problems in the above-mentioned background technology.

[0006] To solve the above technical problems, according to one aspect of the present invention, more specifically, a large-scale integrated die casting flip-type manual inspection system includes a fixed frame, a front lifting fence module, a flip module, a driving slide rail, a rear lifting fence module, a lifting structure, a laser radar module and an analysis computer module; The flip module is used to fix the die casting and flip the fixed die casting until it is perpendicular to the laser radar module; The lifting structure is used to change the surface range of the die-casting part scanned and detected by the laser radar module by changing the height of the die-casting part; The laser radar module is used to transmit the laser radar to the surface of the die casting and receive the reflected wave reflected by the surface of the die casting; The analysis computer module is used to analyze whether the scanned pixel point is a bad pixel based on the polarization degree of the reflected wave received by the laser radar module, the amplitude of the reflected wave, and the influence index of the material itself on the reflectivity, and determine the roughness of the die-casting surface by the proportion of bad pixels.

[0007] Furthermore, the analysis computer module determines the influence coefficient of the material itself on the reflectivity based on the average reflectivity and peak value of the near-infrared band and the average reflectivity and peak value of the mid-infrared band, which are: In the formula, Represents the influence coefficient of the material itself on the reflectivity, represents the average reflectivity in the near-infrared band, represents the average reflectivity in the mid-infrared band, Indicates the peak value of the reflected wave in the near-infrared band. Indicates the peak value of the reflected wave in the mid-infrared band.

[0008] Furthermore, the analysis computer module determines whether the pixel scanned by the laser radar is a bad pixel based on the reflectivity of the received reflected wave, the amplitude of the reflected wave, and the influence index of the material itself on the reflectivity, including: In the formula, Indicates the probability coefficient that the pixel scanned by the laser radar is a bad pixel, Represents the influence coefficient of the material itself on the reflectivity, Represents the polarization degree of the reflected wave at the pixel point, Indicates the amplitude of the reflected wave at the pixel point; when , it means that the defect at the pixel is too large and needs to be marked as a bad pixel; when , it means that the defect at the pixel meets the requirements and needs to be marked as a white point.

[0009] Furthermore, the analysis computer module determines whether the surface roughness of the die casting exceeds the index according to the proportion of the number of bad pixels after the die casting is scanned in the total number of pixels that can be scanned, which is: In the formula, Indicates the roughness index coefficient of the die casting surface; Indicates the pixels marked as bad pixels after the laser radar scans the die casting; Indicates the maximum number of pixels that the laser radar can scan for die castings; when When , it means that the roughness of the die casting surface exceeds the production index; when When , it means that the surface roughness of the die casting meets the production indicators.

[0010] Furthermore, the front lifting fence module and the rear lifting fence module are respectively arranged on the front and rear sides of the fixed frame, the lifting structure is located inside the fixed frame, and the lifting structure is connected to the flip module through a driving slide rail; a guide rail is also provided on the upper rear side of the fixed frame, and the laser radar module is movably mounted on the guide rail.

[0011] Furthermore, the front lifting fence module specifically includes: a fixed fence, a lifting fence, a hydraulic cylinder 1, and a guide rail 1; There are two guide rails, and the two guide rails are respectively arranged on both sides of the fixed fence. The lifting fence is slidably connected to the fixed fence through the two guide rails. There are two hydraulic cylinders, wherein the output shaft of the hydraulic cylinder is fixedly connected to the lifting fence, and the base of the hydraulic cylinder is fixedly connected to the fixed fence.

[0012] Furthermore, the flip module specifically includes: a fixed plate, a second hydraulic cylinder, a flip plate and a fixed assembly; The flip module is fixedly mounted on the driving slide rail via a fixed plate, the hydraulic cylinder 2 and the flip plate are rotationally connected to the left and right sides of the fixed plate respectively, and the output shaft of the hydraulic cylinder 2 is rotationally connected to the waist of the flip plate, and the fixed assembly is located above the flip plate.

[0013] Furthermore, the lifting structure specifically includes: a second guide rail, a lifting platform and a third hydraulic cylinder; The guide rail 2 is fixedly installed on the inner wall of the fixed frame, and the lifting platform is lifted and moved inside the fixed frame through the guide rail 2. There are two hydraulic cylinders 3, and the two hydraulic cylinders 3 are respectively fixed on the left and right sides of the fixed frame, and the output shaft of the hydraulic cylinder 3 is fixedly connected to the lifting platform.

[0014] Beneficial effects: 1. The present invention fixes the die-casting above the flip module, and after passing the manual inspection, it is transferred to the inside of the fixed frame by the driving slide rail, and then the flip module flips the die-casting to an angle perpendicular to the laser radar module, and then starts the laser radar to perform a more detailed scanning and detection of the die-casting. This scanning and detection method can maximize the guarantee that the die-casting will not be affected by the external environment during the detection process.

[0015] 2. The present invention controls the emitted laser to move along the Z-axis direction on the surface of the die-casting by moving the laser radar module back and forth on the guide rail, and controls the movement of the lifting structure to control the emitted laser to move along the Y-axis direction on the surface of the die-casting. The design of this direction control can maximize the scanning of the die-casting surface.

[0016] 3. The present invention uses the laser radar module to receive the polarization degree of the reflected wave, the amplitude of the reflected wave, and the material's own influence index on the reflectivity to analyze whether the scanned pixel point is a bad pixel, and determines whether the surface roughness of the die-casting meets the production standards through the proportion of bad pixels. This judgment logic can further improve the precision of die-casting quality inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the interior of the fixed frame of the present invention; Figure 3 It is a structural schematic diagram of the flip module of the present invention; Figure 4 It is a structural schematic diagram of the front lifting fence module of the present invention; Figure 5 a is a scanning diagram of the die casting in the present invention when it is in a low position, and b is a scanning diagram of the die casting in the present invention when it is in a high position; Figure 6 This is a distribution diagram of bad spots and white spots after scanning the die casting of the present invention.

[0018] In the figure: 1. Fixed frame; 2. Front lifting fence module; 3. Flipping module; 4. Driving slide rail; 5. Rear lifting fence module; 6. Lifting structure; 7. Lifting radar module; 8. Guide rail; 9. Analysis computer module; 21. Fixed fence; 22. Lifting fence; 23. Hydraulic cylinder one; 24. Guide rail one; 31. Fixed plate; 32. Hydraulic cylinder two; 33. Flipping plate; 34. Fixed component; 61. Guide rail two; 62. Lifting platform; 63. Hydraulic cylinder three. DETAILED DESCRIPTION

[0019] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1 like Figure 1- As shown in Figure 4, according to one aspect of the present invention, there is provided a large-scale integrated die-casting flip-type manual inspection system, comprising a fixed frame 1, a front lifting fence module 2, a flip module 3, a driving slide rail 4, a rear lifting fence module 5, a lifting structure 6, a laser radar module 7 and an analysis computer module 9; the front lifting fence module 2 and the rear lifting fence module 5 are respectively arranged on the front and rear sides of the fixed frame 1, the lifting structure 6 is located inside the fixed frame 1, and the lifting structure 6 is connected to the flip module 3 through the driving slide rail 4; a guide rail 8 is also provided on the upper rear side of the fixed frame 1, and the laser radar module 7 is movably mounted on the guide rail 8.

[0021] The flip module 3 is used to fix the die-casting and flip the fixed die-casting until it is perpendicular to the laser radar module 7; the lifting structure 6 is used to change the surface range of the laser radar module 7 for scanning and detecting the die-casting by changing the height of the die-casting; the laser radar module 7 is used to transmit the laser radar to the surface of the die-casting and receive the reflected wave reflected from the surface of the die-casting; the analysis computer module 9 is used to analyze whether the scanned pixel point is a bad pixel according to the polarization degree of the reflected wave received by the laser radar module 7, the amplitude of the reflected wave, and the influence index of the material itself on the reflectivity, and determine the roughness of the die-casting surface by the proportion of bad pixels.

[0022] The working principle of this embodiment is as follows: the die casting is fixed on the top of the flip module 3, and after the manual inspection is qualified, the detection program of the analysis computer is started, and the driving slide rail 4 is transmitted to the inside of the fixed frame 1. During this process, the front lifting fence module 2 needs to be controlled to open. After that, the flip module 3 flips the die casting to an angle perpendicular to the laser radar module 7, and then the laser radar is started to scan and detect the die casting in more detail.

[0023] Example 2 like Figure 5 , 6 As shown, the analysis computer module 9 determines the influence coefficient of the material itself on the reflectivity based on the average reflectivity and peak value of the near-infrared band and the average reflectivity and peak value of the mid-infrared band, which are: In the formula, Represents the influence coefficient of the material itself on the reflectivity, represents the average reflectivity in the near-infrared band, represents the average reflectivity in the mid-infrared band, Indicates the peak value of the reflected wave in the near-infrared band. Indicates the peak value of the reflected wave in the mid-infrared band.

[0024] The laser radar module 7 performs scanning and detection on the die casting X. The average reflectivity in the near infrared band is , the average reflectivity in the mid-infrared band is , the peak value of the reflected wave in the near infrared band is 0.8 (μm), the peak value of the reflected wave in the mid-infrared band is 4 (μm), then: From the above calculation, it can be known that after the laser radar module 7 scans and detects the die casting X, the influence coefficient of the die casting X itself on the reflectivity is .

[0025] The analysis computer module 9 determines whether the pixel scanned by the laser radar is a bad pixel according to the polarization degree of the received reflected wave, the amplitude of the reflected wave, and the influence index of the material itself on the reflectivity, which are: In the formula, Indicates the probability coefficient that the pixel scanned by the laser radar is a bad pixel, Represents the influence coefficient of the material itself on the reflectivity, Represents the polarization degree of the reflected wave at the pixel point, Indicates the amplitude of the reflected wave at the pixel point.

[0026] The laser radar module 7 scans and detects the pixel point at the coordinate (100, 100) on the die casting X. The polarization degree of the reflected wave at the pixel point (100, 100) is (Polarization degree = intensity of polarized light ÷ total light intensity, where total light intensity includes polarized light and non-polarized light. The value range is from 0 (completely non-polarized) to 1 (completely polarized)). The average amplitude of the reflected wave at the pixel point (100,100) is (μm). Then we have: From the above calculation, it can be known that after the laser radar module 7 scans and detects the pixel point at the coordinate (100, 100) on the die casting X, the probability coefficient of the scanned pixel point being a bad pixel is , and compare multiple pixels, then we have: From the above table data, we can know that when the sample data of pixel points tends to be infinite, we can classify whether there are scars, pits, and scratches according to the probability coefficient H. , it means that the defect at the pixel is too large and needs to be marked as a bad pixel (bad pixel means probability coefficient pixels); , it means that the defect at the pixel meets the requirements and needs to be marked as a white dot (the white dot represents the probability coefficient Pixels, such as Figure 6 as shown).

[0027] like Figure 6 As shown, the analysis computer module 9 determines whether the surface roughness of the die casting exceeds the index according to the proportion of the number of bad pixels after the die casting is scanned in the total number of pixels that can be scanned, and there are: In the formula, Indicates the roughness index coefficient of the die casting surface; Indicates the pixels marked as bad pixels after the laser radar scans the die casting; Indicates the maximum number of pixels that the laser radar can scan for die castings; when When , it means that the surface roughness of the die casting exceeds the production index. When , it means that the surface roughness of the die casting meets the production indicators.

[0028] Among them, the number of all bad points on the die casting X is counted, and the pixel points marked as bad points after the laser radar scans the die casting are , the maximum number of pixels that the laser radar can scan for die castings is , then we have: From the above calculation, it can be known that the roughness of the surface of the die casting X meets the production indicators.

[0029] Example 3 like Figure 4 As shown, the front lifting fence module 2 specifically includes: a fixed fence 21, a lifting fence 22, a hydraulic cylinder 23, and a guide rail 24; there are two guide rails 24, and the two guide rails 24 are respectively arranged on both sides of the fixed fence 21, and the lifting fence 22 is slidably connected to the fixed fence 21 through the two guide rails 24, and there are two hydraulic cylinders 23, wherein the output shaft of the hydraulic cylinder 23 is fixedly connected to the lifting fence 22, and the base of the hydraulic cylinder 23 is fixedly connected to the fixed fence 21. After the two hydraulic cylinders 23 are started, they will drive the lifting fence 22 to move up and down along the guide rail 24. In this way, when the die-casting needs to be stored, the lifting fence 22 can be lifted, and then the lifting fence 22 can be controlled to descend to protect the die-casting from being affected during inspection.

[0030] like Figure 3As shown, the flip module 3 specifically includes: a fixed plate 31, a second hydraulic cylinder 32, a flip plate 33 and a fixed assembly 34; the flip module 3 is fixedly mounted on the driving slide rail 4 through the fixed plate 31, the second hydraulic cylinder 32 and the flip plate 33 are rotatably connected to the left and right sides of the fixed plate 31 respectively, and the output shaft of the second hydraulic cylinder 32 is rotatably connected to the waist of the flip plate 33, and the fixed assembly 34 is located above the flip plate 33. The die casting can be fixed to the flip module 3 through the fixed assembly 34, and the flip plate 33 can be flipped by starting the second hydraulic cylinder 32, so that the die casting on the flip plate 33 can be flipped until the surface of the die casting is perpendicular to the laser radar module 7.

[0031] like Figure 2 As shown, the lifting structure 6 specifically includes: a guide rail 2 61, a lifting platform 62 and a hydraulic cylinder 3 63; the guide rail 2 61 is fixedly installed on the inner wall of the fixed frame 1, and the lifting platform 62 moves up and down inside the fixed frame 1 through the guide rail 2 61. There are two hydraulic cylinders 3 63, and the two hydraulic cylinders 3 63 are respectively fixed on the left and right sides of the fixed frame 1, and the output shaft of the hydraulic cylinder 3 63 is fixedly connected to the lifting platform 62. The two hydraulic cylinders 3 63 can drive the lifting platform 62 to move up and down, and the turnover module 3 is fixedly connected to the lifting platform 62, so that the lifting platform 62 can drive the die casting on the turnover module 3 to rise or fall when it rises or falls.

[0032] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A large integrated die casting flip manual inspection system, characterized in that: It comprises a fixed frame (1), a front lifting fence module (2), a flip module (3), a driving slide rail (4), a rear lifting fence module (5), a lifting structure (6), a laser radar module (7) and an analysis computer module (9); The flip module (3) is used to fix the die casting and flip the fixed die casting until it is perpendicular to the laser radar module (7); The lifting structure (6) is used to change the surface range of the die-casting part scanned by the laser radar module (7) by changing the height of the die-casting part; The laser radar module (7) is used to transmit the laser radar to the surface of the die casting and receive the reflected wave reflected by the surface of the die casting; The analysis computer module (9) is used to analyze whether the scanned pixel point is a bad pixel based on the polarization degree of the reflected wave received by the laser radar module (7), the amplitude of the reflected wave, and the material's own influence index on the reflectivity, and determine the roughness of the die-casting surface by the proportion of the bad pixels.

2. The large integrated die casting flipping manual inspection system according to claim 1 is characterized in that: The analysis computer module (9) determines the influence coefficient of the material itself on the reflectivity based on the average reflectivity and peak value of the near-infrared band and the average reflectivity and peak value of the mid-infrared band, which is: In the formula, Represents the influence coefficient of the material itself on the reflectivity, represents the average reflectivity in the near-infrared band, represents the average reflectivity in the mid-infrared band, Indicates the peak value of the reflected wave in the near-infrared band. Indicates the peak value of the reflected wave in the mid-infrared band.

3. The large integrated die casting flipping manual inspection system according to claim 2 is characterized in that: The analysis computer module (9) determines whether the pixel scanned by the laser radar is a bad pixel based on the reflectivity of the received reflected wave, the amplitude of the reflected wave, and the influence index of the material itself on the reflectivity, as follows: In the formula, Indicates the probability coefficient that the pixel scanned by the laser radar is a bad pixel, Represents the influence coefficient of the material itself on the reflectivity, Represents the polarization degree of the reflected wave at the pixel point, Indicates the amplitude of the reflected wave at the pixel point; when , it means that the defect at the pixel is too large and needs to be marked as a bad pixel; when , it means that the defect at the pixel meets the requirements and needs to be marked as a white point.

4. The large integrated die casting flipping manual inspection system according to claim 3 is characterized in that: The analysis computer module (9) determines whether the surface roughness of the die casting exceeds the index according to the proportion of the number of bad pixels after the die casting is scanned to the total number of pixels that can be scanned, and the roughness is: In the formula, Indicates the roughness index coefficient of the die casting surface; Indicates the pixels marked as bad pixels after the laser radar scans the die casting; Indicates the maximum number of pixels that the laser radar can scan for die castings; when When , it means that the roughness of the die casting surface exceeds the production index; when When , it means that the surface roughness of the die casting meets the production indicators.

5. The large integrated die casting flipping manual inspection system according to claim 1 is characterized in that: The front lifting fence module (2) and the rear lifting fence module (5) are respectively arranged on the front and rear sides of the fixed frame (1); the lifting structure (6) is located inside the fixed frame (1); the lifting structure (6) is connected to the flip module (3) via a driving slide rail (4); a guide rail (8) is also provided on the upper rear side of the fixed frame (1); and the laser radar module (7) is movably sleeved on the guide rail (8).

6. The large integrated die casting flipping manual inspection system according to claim 1 is characterized in that: The front lifting fence module (2) specifically comprises: a fixed fence (21), a lifting fence (22), a hydraulic cylinder 1 (23), and a guide rail 1 (24); There are two guide rails (24), and the two guide rails (24) are respectively arranged on both sides of the fixed fence (21); the lifting fence (22) is slidably connected to the fixed fence (21) through the two guide rails (24); there are two hydraulic cylinders (23), wherein the output shaft of the hydraulic cylinder (23) is fixedly connected to the lifting fence (22), and the base of the hydraulic cylinder (23) is fixedly connected to the fixed fence (21).

7. The large integrated die casting flipping manual inspection system according to claim 1 is characterized in that: The flip module (3) specifically comprises: a fixed plate (31), a second hydraulic cylinder (32), a flip plate (33) and a fixed assembly (34); The flip module (3) is fixedly mounted on the driving slide rail (4) via a fixed plate (31); the second hydraulic cylinder (32) and the flip plate (33) are rotatably connected to the left and right sides of the fixed plate (31), respectively; the output shaft of the second hydraulic cylinder (32) is rotatably connected to the waist of the flip plate (33); and the fixed assembly (34) is located above the flip plate (33).

8. The large integrated die casting flipping manual inspection system according to claim 1 is characterized in that: The lifting structure (6) specifically comprises: a second guide rail (61), a lifting platform (62) and a third hydraulic cylinder (63); The guide rail 2 (61) is fixedly installed on the inner wall of the fixed frame (1), and the lifting platform (62) is lifted and moved inside the fixed frame (1) through the guide rail 2 (61). There are two hydraulic cylinders 3 (63), and the two hydraulic cylinders 3 (63) are respectively fixed on the left and right sides of the fixed frame (1), and the output shaft of the hydraulic cylinder 3 (63) is fixedly connected to the lifting platform (62).

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