A mold cavity wear detection device

Abstract

This application discloses a mold cavity wear detection device, belonging to the field of mold inspection. The device includes a fixed frame, a U-shaped frame positioned below the fixed frame, a detection camera mounted at the bottom of the U-shaped frame, and a drive mechanism. The drive mechanism includes a drive component fixed to the top of the fixed frame, with its output end passing through the fixed frame and connected to the U-shaped frame. Guide cylinders are fixed to both sides of the fixed frame, and guide rods move axially within the guide cylinders and are connected to the U-shaped frame. The detection camera is suspended and mounted at the mold cavity opening via the fixed frame. Using an electric push rod as the drive component, combined with the guiding action of the guide cylinders and guide rods, ensures that the detection camera maintains linear motion during movement, avoiding shaking during handheld operation, improving positional stability during inspection, and guaranteeing the clarity and accuracy of the captured deformation patterns. This, in turn, improves the point cloud data stitching accuracy and the reliability of the wear detection results.

Description

Technical Field

[0001] This application relates to the field of mold inspection technology, specifically a mold cavity wear detection device. Background Technology

[0002] In modern manufacturing, molds are key process equipment for the mass production of various parts, and the precision of their cavity surfaces directly determines the dimensional consistency and appearance quality of the products. However, during long-term service, mold cavities inevitably experience surface wear due to factors such as continuous material friction, high-temperature and high-pressure environmental erosion, and cyclic load impacts. If this wear is not detected and repaired in a timely manner, it will lead to decreased product dimensional accuracy, increased scrap rate, and in severe cases, even mold failure, resulting in huge production losses. Therefore, accurate and efficient detection of mold cavity wear has become an important link in ensuring production stability and reducing manufacturing costs.

[0003] To meet the needs of mold cavity wear detection, various detection technologies have been developed in the industry. Among them, detection methods based on optical three-dimensional measurement principles have been widely used due to their significant advantages. This type of technology projects laser lines or grating patterns onto the cavity surface, uses a camera to capture the deformed patterns modulated by the surface morphology, and after data processing, can quickly obtain dense point cloud data of the cavity surface. By comparing and analyzing the measured point cloud with the original CAD model, a full-field deviation chromatogram can be generated, which intuitively displays the location distribution and wear degree of the wear area. This type of technology has outstanding features such as fast detection speed, comprehensive data coverage, and non-contact measurement (especially suitable for soft or easily damaged surfaces), effectively overcoming the shortcomings of traditional contact detection methods such as low efficiency and easy damage to the workpiece surface, and has become a mature technical solution in the field of mold cavity wear detection.

[0004] However, most mainstream inspection devices on the market based on the above principles rely on manual hand-held camera movement to capture deformed patterns. In practical applications, this hand-held operation mode lacks stable support and positioning benchmarks. Operators are easily affected by hand tremors and irregular movement trajectories during device movement, making it difficult to ensure the relative positional stability of the inspection device and the cavity surface. This can lead to blurred or misaligned images, affecting the stitching accuracy of point cloud data, and may also reduce the reliability and completeness of inspection results due to repeated or missed detection paths, adversely affecting subsequent wear analysis and mold repair.

[0005] Therefore, this application provides a mold cavity wear detection device to solve the above problems. Utility Model Content

[0006] This application provides a mold cavity wear detection device, which aims to solve the problems mentioned in the background art. Most of the existing detection devices are operated by hand. When the camera is manually held to capture deformed patterns, the stability of the detection device cannot be ensured during the movement, which leads to the acquisition of blurry and misaligned images, affecting the accuracy of point cloud data stitching and reducing the reliability and completeness of the detection results.

[0007] To achieve the above objectives, this application provides the following technical solution: a mold cavity wear detection device, comprising a fixing frame for fixing on the mold, a U-shaped frame disposed below the fixing frame, a detection camera installed at the bottom of the U-shaped frame, and a drive mechanism for driving the detection camera to move closer to or away from the center of the mold; the drive mechanism includes a drive component fixed to the top of the fixing frame, and the output end of the drive component passes through the fixing frame and is connected to the U-shaped frame; guide cylinders are fixed to both sides of the fixing frame, and guide rods move axially within the guide cylinders and are connected to the U-shaped frame. By suspending the detection camera at the opening of the mold cavity through the fixing frame, and using an electric push rod as the drive component, combined with the guiding action of the guide cylinders and guide rods, it is ensured that the detection camera maintains linear motion during movement, effectively avoiding the shaking problem during handheld operation, significantly improving the positional stability during the detection process, ensuring the clarity and accuracy of the deformation pattern captured by the camera, and thus improving the point cloud data stitching accuracy and the reliability of the wear detection results.

[0008] Preferably, the driving component is an electric push rod.

[0009] Preferably, to facilitate adjustment of the distance between the inspection camera and the mold, the mounting frame is equipped with a lateral adjustment mechanism. This mechanism includes a guide rod symmetrically slidably inserted into one end of the mounting frame, a fixing plate fixed to the end of the guide rod away from the mounting frame for connection to the mold, and a knurled screw threaded into the mounting frame via a first screw hole and abutting against the guide rod. This lateral adjustment mechanism allows for flexible adjustment of the distance between the inspection camera and the mold, adapting to the inspection needs of mold cavities of different depths and sizes, thus enhancing the versatility of the device.

[0010] Preferably, the fixing frame has a guide groove communicating with the first screw hole for fitting the guide rod, and the guide rod is slidably inserted into the guide groove. This provides a precise guide trajectory for the sliding of the guide rod, preventing the guide rod from deviating or wobbling during movement, ensuring the straightness and stability of lateral adjustment, further ensuring the accuracy of the detection camera's position relative to the mold, and indirectly improving the accuracy of the detection data.

[0011] Preferably, to facilitate the installation of the fixing plate: the fixing plate has symmetrical through holes for fixing the fixing plate to a designated position on the mold by bolts, and the mold has a second threaded hole adapted to the bolts. This simplifies the installation process of the fixing plate and the mold. By having the bolts pass through the through holes and engage with the second threaded hole of the mold, the device can be quickly and firmly fixed to the designated position on the mold, ensuring the installation stability of the fixing frame and the entire testing device, and preventing the overall displacement of the device during the testing process from affecting the testing results.

[0012] Preferably, to improve the detection range of the inspection camera on the mold cavity, the inspection device further includes an angle adjustment mechanism for adjusting the angle of the inspection camera. The angle adjustment mechanism includes a drive motor fixedly installed on the outside of the U-shaped frame for driving the inspection camera to rotate in a vertical plane. Rotating rods are fixedly connected to both sides of the inspection camera. These rotating rods are connected to the side wall of the U-shaped frame via bearings, and one of the rotating rods passes through the side wall of the U-shaped frame and is fixedly connected to the output shaft of the drive motor. The drive motor enables the inspection camera to rotate in a vertical plane, changing its shooting angle. This allows the camera lens to cover surfaces inside the mold cavity at different tilt angles, effectively expanding the detection range, avoiding blind spots caused by the complex cavity structure, and improving the comprehensiveness of wear detection.

[0013] Preferably, the angle adjustment mechanism further includes a mounting plate fixed to the output end of the drive component, and an electric turntable fixedly mounted on the bottom of the mounting plate and connected to the guide rod for driving the inspection camera to rotate horizontally. The rotation axis of the electric turntable is fixedly connected to the top of the U-shaped frame. The electric turntable can drive the inspection camera to rotate horizontally, and combined with angle adjustment in the vertical plane, the inspection camera can inspect the mold cavity from multiple horizontal positions, further expanding the inspection range. This is especially suitable for irregularly shaped or large-sized cavities, ensuring no wear detection is missed.

[0014] This application uses a fixed frame to suspend the inspection camera at the opening of the mold cavity. By using an electric push rod as the driving component, and with the guidance of the guide cylinder and guide rod, it can ensure that the inspection camera maintains a straight line during movement, effectively avoiding the shaking problem during hand operation, significantly improving the positional stability during the inspection process, ensuring the clarity and accuracy of the deformed pattern captured by the camera, and thus improving the point cloud data stitching accuracy and the reliability of wear detection results.

[0015] This application utilizes a lateral adjustment mechanism to flexibly adjust the distance between the inspection camera and the mold, adapting to the inspection needs of mold cavities of different depths and sizes, thus enhancing the versatility of the device. The knurled screws facilitate convenient adjustment without additional tools, and ensure a secure fixation, preventing positional shifts after adjustment from affecting inspection accuracy.

[0016] This application utilizes a drive motor to rotate the inspection camera in a vertical plane, changing its shooting angle. This allows the camera lens to cover surfaces inside the mold cavity at different tilt angles, effectively expanding the inspection range and avoiding blind spots caused by the complex cavity structure, thus improving the comprehensiveness of wear detection. An electric turntable drives the inspection camera to rotate horizontally, combined with angle adjustment in the vertical plane, enabling the inspection camera to inspect the mold cavity from multiple horizontal directions, further expanding the inspection range. This is particularly suitable for irregularly shaped or large-sized cavities, ensuring no wear detection is missed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a mold cavity wear detection device;

[0018] Figure 2 This is a schematic diagram of the lateral adjustment mechanism;

[0019] Figure 3 This is a schematic diagram of the angle adjustment mechanism.

[0020] In the picture:

[0021] 1. Fixing frame; 11. Guide groove; 2. U-shaped frame; 3. Detection camera; 4. Drive mechanism; 41. Drive component; 42. Guide cylinder; 43. Guide rod; 5. Lateral adjustment mechanism; 51. Guide rod; 52. Fixing plate; 53. Knurled screw; 6. Angle adjustment mechanism; 61. Drive motor; 62. Electric turntable; 63. Mounting plate. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] Example 1

[0024] This embodiment provides a device for detecting the wear of a mold cavity, such as... Figure 1-3As shown, the detection device includes a mounting frame 1 for fixing to the mold, a U-shaped frame 2 located below the mounting frame 1, a detection camera 3 installed at the bottom of the U-shaped frame 2, and a drive mechanism 4 for driving the detection camera 3 to move closer to or away from the center of the mold. The drive mechanism 4 includes a drive component 41 fixed to the top of the mounting frame 1, and the output end of the drive component 41 passes through the mounting frame 1 and is connected to the U-shaped frame 2. Guide cylinders 42 are fixed to both sides of the mounting frame 1, and guide rods 43 move axially within the guide cylinders 42 and are connected to the U-shaped frame 2. The detection camera 3 is suspended and installed at the opening of the mold cavity through the mounting frame 1. Using an electric push rod as the drive component 41, combined with the guiding action of the guide cylinders 42 and the guide rods 43, it can be ensured that the detection camera 3 always maintains linear motion during the movement, effectively avoiding the shaking problem during handheld operation, significantly improving the positional stability during the detection process, ensuring the clarity and accuracy of the deformation pattern captured by the camera, and thus improving the point cloud data stitching accuracy and the reliability of wear detection results. When the output end of the drive unit 41 (electric push rod) extends or retracts, it drives the U-shaped frame 2 and the detection camera 3 installed at its bottom to move synchronously. The guide rod 43 slides axially on the guide cylinder 42, which guides and limits the movement of the U-shaped frame 2, ensuring that the detection camera 3 only approaches or moves away from the center of the mold in a straight line, and maintains a stable posture during the movement, always maintaining a parallel relative position with the opening of the mold cavity.

[0025] Drive component 41 is an electric linear actuator. It is recommended to use the DTZ series electric linear actuator (such as the DTZ100).

[0026] To facilitate adjustment of the distance between the inspection camera 3 and the mold, a lateral adjustment mechanism 5 is provided on the mounting frame 1. The lateral adjustment mechanism 5 includes a guide rod 51 symmetrically slidably inserted into one end of the mounting frame 1, a fixing plate 52 fixed to the end of the guide rod 51 away from the mounting frame 1 for connection with the mold, and a knurled screw 53 threaded into the mounting frame 1 through a first screw hole and abutting against the guide rod 51. The design of the lateral adjustment mechanism 5 allows for flexible adjustment of the distance between the inspection camera 3 and the mold, adapting to the inspection needs of mold cavities of different depths and sizes, thus enhancing the versatility of the device. The knurled screw 53 makes adjustment convenient, requiring no additional tools, and provides a secure fixation, preventing positional shifts after adjustment that could affect inspection accuracy. Loosening the knurled screw 53 so that it no longer abuts the guide rod 51 allows the guide rod 51 to slide within the guide groove 11 of the mounting frame 1, changing the relative position between the fixing plate 52 and the mounting frame 1, thereby adjusting the distance between the inspection camera 3 and the mold. Once the spacing is adjusted to the appropriate position, tighten the knurled screw 53 so that its end is in close contact with the guide rod 51, and use friction to fix the position of the guide rod 51, thus completing the spacing locking.

[0027] The fixed frame 1 has a guide groove 11 that communicates with the first screw hole and is adapted to fit the guide rod 51. The guide rod 51 is slidably inserted into the guide groove 11. This provides a precise guide trajectory for the sliding of the guide rod 51, preventing the guide rod 51 from deviating or shaking during movement, ensuring the straightness and stability of the lateral adjustment, further ensuring the accuracy of the position of the detection camera 3 relative to the mold, and indirectly improving the accuracy of the detection data. The size of the guide groove 11 is adapted to the guide rod 51. When the guide rod 51 slides in the guide groove 11, the groove wall constrains the guide rod 51, limiting its displacement perpendicular to the sliding direction, so that the guide rod 51 can only move in a straight line along the axial direction of the guide groove 11, providing a structural basis for the stable operation of the lateral adjustment mechanism 5.

[0028] To facilitate the installation of the fixing plate 52, symmetrical through holes are provided on the fixing plate 52 for fixing it to a designated position on the mold using bolts. The mold also has a second threaded hole that matches the bolts. This simplifies the installation process between the fixing plate 52 and the mold. By having the bolts pass through the through holes and engage with the second threaded hole on the mold, the device can be quickly and securely fixed to the designated position on the mold, ensuring the stability of the mounting bracket 1 and the entire testing device, and preventing overall device displacement during testing that could affect the test results. Simultaneously, the bolt connection method facilitates the disassembly and reuse of the device, reducing operational difficulty. During installation, the fixing plate 52 is aligned with the preset mounting surface of the mold, aligning the through holes with the second threaded hole on the mold. The bolts are then passed through the through holes, screwed into the second threaded hole, and tightened. The threaded connection force of the bolts secures the fixing plate 52 to the mold as a single unit, thus achieving stable installation of the entire testing device on the mold.

[0029] Example 2

[0030] Unlike Embodiment 1, to improve the detection range of the inspection camera 3 on the mold cavity, the inspection device also includes an angle adjustment mechanism 6 for adjusting the angle of the inspection camera 3. The angle adjustment mechanism 6 includes a drive motor 61 fixedly installed on the outside of the U-shaped frame 2 to drive the inspection camera 3 to rotate in a vertical plane. Rotating rods are fixedly connected to both sides of the inspection camera 3, and these rods are connected to the side wall of the U-shaped frame 2 via bearings. One of the rotating rods passes through the side wall of the U-shaped frame 2 and is fixedly connected to the output shaft of the drive motor 61. The drive motor 61 can drive the inspection camera 3 to rotate in a vertical plane, changing its shooting angle so that the camera lens can cover surfaces inside the mold cavity at different tilt angles, effectively expanding the detection range, avoiding blind spots caused by the complex cavity structure, and improving the comprehensiveness of wear detection. After the drive motor 61 starts, its output shaft drives the rotating rods fixed to it to rotate. The rotating rods are connected to the side wall of the U-shaped frame 2 via bearings, and during rotation, they drive the inspection camera 3 to rotate synchronously. Since both sides of the rotating rods are positioned by bearings, the inspection camera 3 rotates smoothly in a vertical plane, achieving precise adjustment of the shooting angle. For the 61 model drive motor, a 36HB stepper motor is recommended.

[0031] The angle adjustment mechanism 6 also includes a mounting plate 63 fixed to the output end of the drive component 41, and an electric turntable 62 fixedly mounted on the bottom of the mounting plate 63 and connected to the guide rod 43 for driving the horizontal rotation of the inspection camera 3. The rotation axis of the electric turntable 62 is fixedly connected to the top of the U-shaped frame 2. It can drive the inspection camera 3 to rotate horizontally. Combined with the angle adjustment in the vertical plane, the inspection camera 3 can inspect the mold cavity from multiple horizontal directions, further expanding the inspection range. It is especially suitable for irregularly shaped or large-sized cavities, ensuring no wear detection is missed. After the electric turntable 62 is started, its rotation axis drives the U-shaped frame 2 and the inspection camera 3, which are fixed to it, to rotate horizontally as a whole, thereby changing the orientation of the inspection camera 3 in the horizontal direction. Combined with the angle adjustment of the drive motor 61, it achieves multi-angle inspection coverage of the inspection camera 3 in three-dimensional space. It is recommended to use the GY-6020 series electric turntable for the electric turntable 62.

[0032] In this application, the control method is achieved through a controller. The controller's control circuit can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0033] All electrical components mentioned in the text are electrically connected to the main controller and power supply. The main controller can be a conventional and known device such as a computer, and the existing publicly available power connection technology will not be elaborated in the text.

[0034] It should be noted that many of the standard parts used in this application are available on the market, while non-standard parts can be specially customized. The connection method used in this application is also a very common method in the mechanical field, and will not be described in detail here.

[0035] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A device for detecting the wear amount of a mold cavity, characterized in that: A fixing bracket (1) for fixing on a mold, a U-shaped bracket (2) arranged below the fixing bracket (1), an inspection camera (3) installed at the bottom of the U-shaped bracket (2), and a driving mechanism (4) for driving the inspection camera (3) to move closer to or away from the center of the mold; The driving mechanism (4) includes a driving member (41) fixedly connected to the top of the fixing bracket (1), and the output end of the driving member (41) penetrates through the fixing bracket (1) and is connected to the U-shaped bracket (2). Guide cylinders (42) are fixedly connected to both sides of the fixing bracket (1), and guide rods (43) axially moving in the guide cylinders (42) and connected to the U-shaped bracket (2).

2. The mold cavity wear amount detection device according to claim 1, characterized by: The driving member (41) is an electric push rod.

3. The mold cavity wear amount detection device according to claim 1, characterized by: A lateral adjustment mechanism (5) is arranged on the fixing bracket (1). The lateral adjustment mechanism (5) includes guide rods (51) symmetrically and slidably inserted at one end of the fixing bracket (1), a fixing plate (52) fixedly connected to the end of the guide rod (51) away from the fixing bracket (1) for connecting with the mold, and a knurled screw (53) threadedly inserted through a first screw hole in the fixing bracket (1) and abutted against the guide rod (51).

4. The mold cavity wear amount detection device according to claim 3, characterized by: A guide groove (11) adapted to the guide rod (51) and communicating with the first screw hole is formed in the fixing bracket (1), and the guide rod (51) is slidably inserted into the guide groove (11).

5. The mold cavity wear amount detection device according to claim 3, characterized by: Through holes for fixing and installing the fixing plate (52) at a specified position on the mold by bolts are symmetrically formed in the fixing plate (52), and second screw holes adapted to the bolts are formed in the mold.

6. The mold cavity wear amount detection device according to claim 1, wherein: The inspection device further includes an angle adjustment mechanism (6) for adjusting the angle of the inspection camera (3). The angle adjustment mechanism (6) includes a driving motor (61) fixedly installed outside the U-shaped bracket (2) for driving the inspection camera (3) to rotate in a vertical plane. Rotating rods are fixedly connected to both sides of the inspection camera (3), and the rotating rods are connected to the side wall of the U-shaped bracket (2) through bearings, and one of the rotating rods penetrates through the side wall of the U-shaped bracket (2) and is fixedly connected to the output shaft of the driving motor (61).

7. The mold cavity wear amount detection device according to claim 6, wherein: The angle adjustment mechanism (6) further includes a mounting plate (63) fixedly connected to the output end of the driving member (41), and an electric turntable (62) fixedly installed at the bottom of the mounting plate (63) and fixedly connected to the guide rod (43) for driving the inspection camera (3) to rotate horizontally. The rotating shaft of the electric turntable (62) is fixedly connected to the top of the U-shaped bracket (2).

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