A surface defect detection apparatus for die castings

Abstract

The utility model relates to detection equipment technical field, and disclose a kind of die casting surface defect detection equipment, the side of detection platform is provided with the line laser profile measuring instrument of fixed connection with workbench, the upper end of workbench is fixedly installed with multiple slide rails, the outside of one of slide rails is fixedly installed with rack rail, the inside of driven disc is provided with multiple groups of placing pieces, multiple groups of placing pieces and multiple through holes one-to-one correspond, in reciprocating detection process, the front face, back of die casting is detected in turn, avoid the unqualified product flowing into next process due to turning over not in time or missing, and while this group of detection, staff can take and put piece operation to another group of detection completed, realize the parallel operation of detection and feeding, completely eliminate the downtime of traditional equipment, improve detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a surface defect testing device for die-cast parts. Background Technology

[0002] Die castings are widely used in many fields such as automobiles, aerospace, and electronics, where there are extremely high requirements for the appearance and functionality of products.

[0003] However, during the die casting process, due to factors such as process parameters, mold design, and raw materials, die castings are prone to various defects, such as porosity, shrinkage cavities, cracks, inclusions, burrs, and scratches. These defects not only affect the appearance quality of the die castings but may also reduce their performance and safety. Therefore, it is necessary to conduct rigorous inspection of the surface defects of die castings.

[0004] With the rapid development of optical, electronic, computer, and artificial intelligence technologies, optical inspection technology has been widely used in the field of surface defect detection for die-cast parts due to its high precision, high efficiency, and non-contact nature. For example, Chinese patent CN213843053U discloses a surface defect detection device for aluminum die-cast parts. Two cylinders extend to lower a horizontal plate, four pneumatic grippers clamp two castings, two lead screw modules move the castings onto a rotating seat, and then an electric turntable moves the two castings to be inspected to the area under two first supports. Two first vision inspection modules inspect the internal surface of the castings. After inspection, the electric turntable rotates, aligning the inspected castings with two second supports. The pick-and-place structure moves the castings onto two conveyors for the next round of inspection.

[0005] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: During the use of existing testing equipment, frequent downtime and waiting situations occur due to operations such as loading and unloading materials. This not only directly reduces the testing throughput per unit time of the equipment, making it difficult to meet the high-efficiency quality inspection requirements of large-scale die casting production, but also causes accelerated wear of mechanical parts and unstable electrical system conditions due to repeated start-ups and shutdowns, increasing equipment maintenance costs and failure rates. Utility Model Content

[0006] The technical problem to be solved by this utility model is that the existing detection equipment has the disadvantage of frequent shutdowns due to operations such as loading and unloading. To address this, we propose a surface defect detection device for die castings.

[0007] To achieve the above objectives, this application adopts the following technical solution: a die-casting surface defect detection device, including a worktable and a detection table fixedly connected to its upper end, a line laser profile measuring instrument fixedly connected to the worktable is provided on one side of the detection table, and multiple slide rails are fixedly installed on the upper end of the worktable, with a toothed rail fixedly installed on the outer side of one of the slide rails.

[0008] The testing table includes a servo motor fixedly connected to the worktable. The drive end of the servo motor is fixedly mounted with a driven plate through a coupling. Multiple through holes are opened through the inner side of the driven plate. The multiple through holes are arranged in a circle around the axis of the driven plate. Multiple sets of placement parts are arranged inside the driven plate. The multiple sets of placement parts correspond one-to-one with the multiple through holes.

[0009] The placement component includes an acrylic placement cylinder and a connecting rod that passes through its inner side. The connecting rod is slidably connected to the acrylic placement cylinder. A sleeve is slidably fitted on the outer side of one end of the connecting rod. A bevel gear is fixedly installed on one end of the sleeve. The bevel gear meshes with the gear rail. The sleeve passes through the driven disc and is rotatably connected.

[0010] Preferably, a spring is fixedly installed on the inner wall of the sleeve, one end of the spring is fixedly connected to a connecting rod, the connecting rod is movably connected to the driven plate, a connecting rod is provided through the inner side of the acrylic placement cylinder, the connecting rod is rotatably connected to the surface of the through hole, the connecting rod and the connecting rod are symmetrically arranged, and a clamping plate is fixedly installed at the ends of the connecting rods that are close to each other.

[0011] Preferably, rubber airbags are fixedly installed on the sides of the two clamping plates that are close to each other, and the rubber airbags are filled with gas.

[0012] Preferably, an acrylic cover plate is provided on one side of the acrylic placement cylinder, and the acrylic cover plate is fitted and sealed with the acrylic placement cylinder.

[0013] Preferably, the surface of the through hole is symmetrically provided with arc-shaped grooves, and elastic elements are symmetrically provided on the outer side of the acrylic placement tube. The elastic elements include a second spring that is fixedly connected to the outer wall of the acrylic placement tube. An arc-shaped protrusion is fixedly installed on the end of the second spring that is away from the acrylic placement tube, and the arc-shaped protrusion matches the arc-shaped groove.

[0014] Preferably, a telescopic rod is provided on the inner side of the second spring, and the two ends of the telescopic rod are fixedly connected to the acrylic placement cylinder and the arc-shaped protrusion, respectively.

[0015] Preferably, the plurality of slide rails are arranged circumferentially around the axis of the driven disk, and the slide rails are slidably connected to the driven disk.

[0016] The technical effects and advantages of this utility model are as follows: First, the servo motor is started and driven by the coupling to rotate the driven plate by a certain angle and then stops. At this time, one of the through holes is located directly below the line laser profile measuring instrument, so that the surface of the die-casting part inside the acrylic placement cylinder is inspected for defects. After the inspection is completed, the driven plate is driven to rotate by a certain angle again and then stops. This process is repeated to achieve efficient inspection of the die-casting part. During the reciprocating inspection, the bevel gear meshes with the gear rail, thereby driving the sleeve, connecting rod one and the acrylic placement cylinder to rotate 180° synchronously, causing the die-casting part to be flipped. Then, during the reciprocating inspection, the front and back of the die-casting part are scanned and inspected in sequence to ensure that there are no blind spots for defects. This effectively avoids defective products flowing into the next process due to untimely or missed flipping. During the reciprocating inspection, after the die-casting part is inspected, it can be removed and replaced. This allows the operator to pick up and put down parts of another group that has been inspected while the other group is being inspected, realizing parallel operation of inspection and loading / unloading. This completely eliminates the downtime waiting time of traditional equipment and improves inspection efficiency. Attached Figure Description

[0017] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0018] Figure 1 This is a top view of the overall structure of this utility model;

[0019] Figure 2 This is a top view of the workbench structure of this utility model;

[0020] Figure 3 This is a bottom view of the structure of the testing platform of this utility model;

[0021] Figure 4 This is an exploded and cross-sectional view of the placement component structure of this utility model;

[0022] Figure 5 This is an exploded and cross-sectional view of the placement component structure of this utility model;

[0023] Legend: 1. Worktable; 11. Slide rail; 12. Gear rail; 2. Line laser profile measuring instrument; 3. Inspection table; 31. Servo motor; 32. Driven plate; 33. Through hole; 34. Arc groove; 4. Placement component; 41. Acrylic placement cylinder; 42. Acrylic cover plate; 43. Connecting rod two; 431. Clamping plate; 432. Rubber airbag; 44. Connecting rod one; 45. Sleeve; 46. Bevel gear; 47. Spring one; 48. Elastic component; 481. Spring two; 482. Arc-shaped protrusion; 483. Telescopic rod. Detailed Implementation

[0024] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0025] Existing testing equipment experiences frequent downtime during operation, such as loading and unloading, which not only directly reduces the equipment's throughput per unit time, making it difficult to meet the high-efficiency quality inspection requirements of large-scale die-casting production, but also causes accelerated wear and tear on mechanical parts and unstable electrical system operation due to repeated start-ups and shutdowns, increasing equipment maintenance costs and failure rates. To address this issue, [the following is a proposed solution]. Figure 1 - Figure 5 As shown, this utility model provides a technical solution: a die casting surface defect detection device, including a workbench 1 and a detection table 3 fixedly connected to its upper end. A line laser profile measuring instrument 2 fixedly connected to the workbench 1 is provided on one side of the detection table 3. A plurality of slide rails 11 are fixedly installed on the upper end of the workbench 1, and a toothed rail 12 is fixedly installed on the outer side of one of the slide rails 11.

[0026] The testing table 3 includes a servo motor 31 fixedly connected to the worktable 1. The drive end of the servo motor 31 is fixedly mounted with a driven plate 32 via a coupling. Multiple through holes 33 are opened through the inner side of the driven plate 32. The multiple through holes 33 are arranged in a circle around the axis of the driven plate 32. Multiple sets of placement parts 4 are arranged inside the driven plate 32. The multiple sets of placement parts 4 correspond one-to-one with the multiple through holes 33.

[0027] The placement component 4 includes an acrylic placement cylinder 41 and a connecting rod 44 that penetrates its inner side. The connecting rod 44 is slidably connected to the acrylic placement cylinder 41. A sleeve 45 is slidably fitted on the outer side of one end of the connecting rod 44. A bevel gear 46 is fixedly installed on one end of the sleeve 45. The bevel gear 46 meshes with the gear rail 12. The sleeve 45 passes through the driven disk 32 and is rotatably connected. First, the servo motor 31 is started and the driven disk 32 is driven to rotate a certain angle through the coupling and then stopped. At this time, one of the through holes 33 is located directly below the line laser profile measuring instrument 2, so that the die-cast surface inside the acrylic placement cylinder 41 is inspected for defects. After the inspection is completed, the driven disk 32 is driven to rotate a certain angle again and then stopped. This process is repeated to achieve the inspection of the die-cast part. The high-efficiency inspection is achieved through a reciprocating inspection process. During this process, the bevel gear 46 meshes with the gear rail 12, causing the sleeve 45, connecting rod 44, and acrylic placement cylinder 41 to rotate 180° synchronously. This flips the die-casting part over, allowing for a comprehensive scan of both the front and back sides of the die-casting part during the reciprocating inspection. This ensures that there are no blind spots for defects and effectively prevents defective products from flowing into the next process due to untimely or missed flipping. After the die-casting part is inspected, it can be removed and replaced. This allows the operator to pick up and place parts from another set of parts that has already been inspected while the other set is being inspected, enabling parallel operation of inspection and loading / unloading. This completely eliminates the downtime of traditional equipment and improves inspection efficiency.

[0028] During the testing process, in order to ensure that the die-cast part remains fixed and stationary throughout the acrylic placement cylinder 41 and to ensure the accuracy of the test, refer to... Figure 4 - Figure 5 As shown in this embodiment: a spring 47 is fixedly installed on the inner wall of the sleeve 45. One end of the spring 47 is fixedly connected to the connecting rod 44. The connecting rod 44 is movably connected to the driven plate 32. A connecting rod 43 is provided through the inner side of the acrylic placement cylinder 41. The connecting rod 43 is rotatably connected to the surface of the through hole 33. The connecting rod 44 and the connecting rod 43 are symmetrically arranged. A clamping plate 431 is fixedly installed at the ends of the connecting rods 44 and 43 that are close to each other. When placing the die casting, the spring 47 can push the connecting rod 44 to drive the clamping plate 431 to abut against the die casting, thereby forming an effective clamping and fixing.

[0029] Reference Figure 4 - Figure 5As shown in this embodiment: rubber airbags 432 are fixedly installed on the side of the two clamping plates 431 that are close to each other. The rubber airbags 432 are filled with gas. After being inflated, the rubber airbags 432 can adapt to the shape of the die-cast part surface and achieve all-round surface contact. Combined with the elastic clamping force of the spring 47, the clamping stability is greatly improved. Moreover, the softness of the rubber material and the buffering and shock absorption effect of the gas can reduce local pressure through its own deformation and gas compression, avoiding indentations and scratches caused by traditional rigid contact, avoiding damage to the surface of the die-cast part, and maintaining the quality of the product.

[0030] Reference Figure 4 - Figure 5 As shown in this embodiment, an acrylic cover plate 42 is provided on one side of the acrylic placement cylinder 41. The acrylic cover plate 42 fits and seals with the acrylic placement cylinder 41, which can effectively prevent external dust, debris and other impurities from entering the cylinder and contaminating the surface of the die-casting or interfering with the laser scanning, ensuring the cleanliness of the testing environment. Moreover, the fitted structure makes it easy for staff to open and close quickly, providing more comprehensive protection and testing guarantee for the die-casting without affecting the loading and unloading efficiency, and further improving the stability and accuracy of the equipment testing.

[0031] During rotation, to ensure the stability of the angle of placement part 4, refer to... Figure 3 - Figure 5 As shown in this embodiment: symmetrical arc-shaped grooves 34 are provided on the surface of the through hole 33. Elastic elements 48 are symmetrically provided on the outer side of the acrylic placement cylinder 41. The elastic element 48 includes a second spring 481 fixedly connected to the outer wall of the acrylic placement cylinder 41. An arc-shaped protrusion 482 is fixedly installed on one end of the second spring 481 away from the acrylic placement cylinder 41. The arc-shaped protrusion 482 matches the arc-shaped groove 34, so that during rotation, the arc-shaped protrusion 482 is inserted into the inner side of the arc-shaped groove 34, thereby avoiding the angle change of the placement part 4. Only when the bevel gear 46 meshes with the gear rail 12 will the second spring 481 be compressed, causing the arc-shaped protrusion 482 to exit the inner side of the arc-shaped groove 34. After the angle adjustment is completed, the arc-shaped protrusion 482 will be reinserted into the inner side of the arc-shaped groove 34.

[0032] Reference Figure 4 - Figure 5 As shown in this embodiment: a telescopic rod 483 is provided on the inner side of the second spring 481. The two ends of the telescopic rod 483 are fixedly connected to the acrylic placement cylinder 41 and the arc-shaped protrusion 482 respectively. Under the restriction of the telescopic rod 483, the second spring 481 can only undergo axial deformation to ensure that its effect is achieved normally.

[0033] Reference Figure 1 - Figure 3As shown, multiple slide rails 11 are arranged in a circle around the axis of the driven disk 32. The slide rails 11 are slidably connected to the driven disk 32. On the one hand, they can support the driven disk 32, avoid putting too much pressure on the servo motor 31, and extend its service life. On the other hand, they can effectively improve the stability of the driven disk 32 during rotation.

[0034] Working principle: First, the servo motor 31 is started and driven by the coupling to rotate the driven plate 32 by a certain angle and then stop. At this time, one of the through holes 33 is located directly below the line laser profile measuring instrument 2, so that the surface of the die-cast part inside the acrylic placement cylinder 41 is inspected for defects. After the inspection is completed, the driven plate 32 is driven to rotate by a certain angle again and then stop. This process is repeated to achieve efficient inspection of the die-cast part. During the reciprocating inspection process, the bevel gear 46 meshes with the gear rail 12, thereby driving the sleeve 45, the connecting rod 44, and the acrylic placement cylinder 41 to move together. The machine rotates 180°, causing the die-cast part to be flipped over. During the reciprocating inspection process, the front and back of the die-cast part are scanned and inspected in sequence to ensure that there are no blind spots for defects. This effectively prevents unqualified products from flowing into the next process due to untimely or missed flipping. During the reciprocating inspection process, once the die-cast part has been inspected, it can be removed and replaced. This allows the staff to pick up and put down parts of another set that has been inspected while the other set is being inspected. This enables parallel operation of inspection and loading / unloading, completely eliminating the downtime of traditional equipment and improving inspection efficiency.

[0035] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A surface defect detection device for die-cast parts, characterized in that, It includes a workbench (1) and a testing table (3) fixedly connected to its upper end. A line laser profile measuring instrument (2) fixedly connected to the workbench (1) is provided on one side of the testing table (3). Multiple slide rails (11) are fixedly installed on the upper end of the workbench (1), and a toothed rail (12) is fixedly installed on the outer side of one of the slide rails (11). The testing table (3) includes a servo motor (31) fixedly connected to the worktable (1). The drive end of the servo motor (31) is fixedly mounted with a driven disk (32) through a coupling. The inner side of the driven disk (32) is provided with multiple through holes (33). The multiple through holes (33) are arranged in a circle around the axis of the driven disk (32). The inner side of the driven disk (32) is provided with multiple sets of placement parts (4). The multiple sets of placement parts (4) correspond one-to-one with the multiple through holes (33). The placement component (4) includes an acrylic placement cylinder (41) and a connecting rod (44) that passes through its inner side. The connecting rod (44) is slidably connected to the acrylic placement cylinder (41). A sleeve (45) is slidably sleeved on the outer side of one end of the connecting rod (44). A bevel gear (46) is fixedly installed on one end of the sleeve (45). The bevel gear (46) meshes with the gear rail (12). The sleeve (45) passes through the driven disk (32) and is rotatably connected.

2. The surface defect detection equipment for die-cast parts according to claim 1, characterized in that: A spring (47) is fixedly installed on the inner wall of the sleeve (45). One end of the spring (47) is fixedly connected to the connecting rod (44). The connecting rod (44) is movably connected to the driven plate (32). A connecting rod (43) is provided through the inner side of the acrylic placement cylinder (41). The connecting rod (43) is rotatably connected to the surface of the through hole (33). The connecting rod (44) and the connecting rod (43) are symmetrically arranged. A clamping plate (431) is fixedly installed at the ends of the connecting rod (44) and the connecting rod (43) that are close to each other.

3. The surface defect detection equipment for die-cast parts according to claim 2, characterized in that: A rubber airbag (432) is fixedly installed on one side of each of the two clamping plates (431) that are close to each other, and the rubber airbag (432) is filled with gas.

4. The surface defect detection equipment for die-cast parts according to claim 1, characterized in that: An acrylic cover plate (42) is provided on one side of the acrylic placement cylinder (41), and the acrylic cover plate (42) is fitted and sealed with the acrylic placement cylinder (41).

5. The surface defect detection equipment for die-cast parts according to claim 1, characterized in that: The surface of the through hole (33) is symmetrically provided with arc-shaped grooves (34), and elastic elements (48) are symmetrically provided on the outer side of the acrylic placement cylinder (41). The elastic element (48) includes a second spring (481) fixedly connected to the outer wall of the acrylic placement cylinder (41). An arc-shaped protrusion (482) is fixedly installed on one end of the second spring (481) away from the acrylic placement cylinder (41), and the arc-shaped protrusion (482) matches the arc-shaped groove (34).

6. The surface defect detection equipment for die-cast parts according to claim 5, characterized in that: The inner side of the second spring (481) is provided with a telescopic rod (483), and the two ends of the telescopic rod (483) are fixedly connected to the acrylic placement cylinder (41) and the arc-shaped protrusion (482) respectively.

7. The surface defect detection equipment for die-cast parts according to claim 1, characterized in that: The multiple slide rails (11) are arranged circumferentially around the axis of the driven disk (32), and the slide rails (11) are slidably connected to the driven disk (32).

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