A macroscopic metallographic corrosion frame for aluminum alloy extruded bars
By designing a rectangular frame structure and a multi-layer material tray for macroscopic metallographic corrosion of aluminum alloy extruded bars, the problems of material collision, uneven corrosion, and cumbersome operation of traditional material frames have been solved, achieving efficient and accurate testing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING ZHONGWANG GROUP CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-05-26
Smart Images
Figure CN224278045U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum processing and testing technology, specifically to a macroscopic metallographic corrosion frame for aluminum alloy extruded bars. Background Technology
[0002] Aluminum alloy extruded bars, as an important industrial material, are widely used in aerospace, automotive manufacturing, and machining. Their performance and quality directly depend on their microstructure, and macroscopic metallographic examination is one of the key methods for assessing material quality. In actual production, aluminum alloy extruded bars require macroscopic metallographic analysis after solution heat treatment. Currently, this inspection process typically uses traditional etching frames for sample mounting and etching. However, due to the large number and diverse specifications of samples, traditional etching frames have revealed many shortcomings in practical applications, severely impacting inspection efficiency and quality.
[0003] The macroscopic metallographic inspection process for aluminum alloy extruded bars mainly includes alkaline etching, water washing, acid pickling, and re-water washing. After solution heat treatment, coarse grain rings may appear on the sample surface, with their thickness strictly controlled to within 1 mm. The formation of coarse grain rings is usually related to the recrystallized grain structure in the surrounding area of the sample during solution heat treatment. However, traditional etching frames have the following main problems in actual operation: First, traditional etching frames are prone to collisions between samples during loading. Since aluminum alloy extruded bars need to be loaded into etching frames for etching after machining and turning, collisions are inevitable during the loading process, which may cause minor damage to the sample surface. These damages may be misjudged as coarse grain defects after etching, leading to false positives or false negatives, seriously affecting the accuracy of the inspection results. Second, traditional etching frames suffer from incomplete etching during the etching process. Because the samples are tightly fitted in the frame, the etching solution cannot penetrate evenly to all sample surfaces, resulting in incomplete etching in some areas. Furthermore, during the washing and acid pickling processes, residues within the etching frame are difficult to remove completely, further affecting the cleanliness of the samples and the corrosion effect, ultimately reducing the accuracy of the inspection. Finally, traditional etching frames require technicians to remove each sample individually for macroscopic metallographic examination after etching. This process is not only time-consuming and labor-intensive but also significantly increases the workload of the technicians, leading to a longer testing cycle and low testing efficiency. This is especially true when a single batch contains as many as 1,000-2,000 samples, where the shortcomings of traditional etching frames become particularly prominent.
[0004] Given the numerous problems with traditional etching frames in practical applications, researching and designing a novel macroscopic metallographic etching frame for aluminum alloy extruded bars is of significant practical importance. Utility Model Content
[0005] To address the problems of incorrect or missed detections due to material collisions during loading, uneven corrosion, incomplete cleaning affecting accuracy, and low efficiency leading to high labor intensity in existing corrosion frames, this utility model provides a macroscopic metallographic corrosion frame for aluminum alloy extruded bars.
[0006] The technical solution adopted by this utility model to achieve the above-mentioned objective is as follows: a macroscopic metallographic corrosion frame for aluminum alloy extruded bars, comprising a main frame structure, an outer mesh grid, and a material holding tray. The main frame structure is a cuboid frame structure, comprising a bottom skeleton, a first side skeleton, a second side skeleton, a first door skeleton, and a second door skeleton. The first side skeleton and the second side skeleton are fixedly connected to the front and rear ends of the bottom skeleton, respectively. The first door skeleton and the second door skeleton are rotatably connected to the left and right ends of the bottom skeleton, respectively. The outer mesh grid covers the outer sides of the bottom skeleton, the first side skeleton, the second side skeleton, the first door skeleton, and the second door skeleton, respectively. The main frame structure has a cavity inside for accommodating multiple layers of the material holding tray. The material holding tray is fixed inside the main frame structure by a fixing device. The bottom wall of the material holding tray is a hollow mesh.
[0007] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided, wherein the first door frame is rotatably connected to the left end of the bottom frame via a frame hinge.
[0008] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided, wherein a first door frame is provided with a first door lock pin groove at one corner of the free end, and a first door lock pin rod is provided at the upper left corner of the second side frame. After the first door frame is flipped over, it is locked by the first door lock pin groove and the first door lock pin rod.
[0009] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided, wherein the second door frame is rotatably connected to the right end of the bottom frame via a frame hinge.
[0010] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided, wherein a second door frame is provided at one corner of the free end of the second door frame, and a second door lock pin is provided at the upper right corner of the second side frame. After the second door frame is flipped over, it is locked by the second door lock pin groove and the second door lock pin.
[0011] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided. The fixing device includes a material tray pin insertion hole and a material holding tray pin shaft. Multiple material tray pin insertion holes are provided and are evenly arranged on the vertical supports of the first side frame and the second side frame. The material holding tray pin shaft is arranged on the outer frame of the material holding tray. The material holding tray is detachably connected to the main structure of the frame through the material holding tray pin shaft and the material tray pin insertion hole.
[0012] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided at both the left and right ends of the holding tray.
[0013] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided inside the material tray, wherein the material tray is provided with multiple partitions, the partitions dividing the inside of the material tray into multiple bar compartments, the bar compartments being used to hold aluminum alloy extruded bars.
[0014] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided, wherein lifting lugs are provided above the vertical columns of the first side frame and the second side frame.
[0015] According to some embodiments of the present invention, a macroscopic metallographic corrosion frame for aluminum alloy extruded bars is provided, wherein the lifting lugs are connected to the main structure of the frame by welding.
[0016] This invention relates to a macroscopic metallographic etching frame for aluminum alloy extruded bars. Through the synergistic design of a cuboid frame structure, multi-layered stackable trays, and an outer mesh grid, it significantly optimizes testing efficiency and data reliability. The regularly distributed bar compartments inside the tray precisely fix the samples, preventing bumps, displacement, or mixing, and reducing surface damage. The outer mesh grid, along with the perforated mesh structure at the bottom of the tray, prevents the aluminum alloy extruded bars from falling out of the etching frame, while simultaneously accelerating the drainage of the etching solution, avoiding residual interference with test results, and reducing the risk of false positives and false negatives. The door achieves rapid opening and closing through the elastic cooperation of the locking pin and its groove. Combined with the design for simultaneous testing of the entire tray of samples, it completely solves the efficiency bottleneck of traditional single-sample operations, shortening the testing cycle and improving work efficiency. Lifting lugs enhance handling stability and adapt to different batch testing needs, while the detachable connection between the mesh grid and the frame facilitates cleaning and maintenance, extending service life. This utility model, through modular structure and functional integration, improves detection accuracy while taking into account ease of operation and industrial applicability. It overcomes the technical pain points of sample mixing, cumbersome operation, and long cycle in traditional metallographic analysis, and provides an efficient, safe and scalable solution for batch testing of aluminum alloy extruded bars. It has significant technological advancement and market application value. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the aluminum alloy extruded bar material frame without a material tray in the macroscopic metallographic corrosion test.
[0018] Figure 2 This is a three-dimensional structural diagram of the material holding tray of this utility model.
[0019] In the diagram: 1. Main structure of the material frame; 1-1. Bottom frame; 1-2. First side frame; 1-3. Second side frame; 1-4. First door frame; 1-5. Second door frame; 2. Material frame hinge; 3. Outer mesh grid; 4-1. First door lock pin groove; 4-2. Second door lock pin groove; 5. Material tray pin hole; 6-1. First door lock pin rod; 6-2. Second door lock pin rod; 7. Material tray; 8. Material tray pin shaft; 9. Partition; 10. Bar compartment; 11. Lifting lug; 12. Material tray handle; 13. Aluminum alloy extruded bar. Detailed Implementation
[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0022] This embodiment provides a macroscopic metallographic etching frame for an aluminum alloy extruded bar, such as... Figure 1 and Figure 2As shown, the device includes a main frame structure 1, an outer mesh grille 3, and a material tray 7. The main frame structure 1 is a cuboid frame structure, comprising a bottom frame 1-1, a first side frame 1-2, a second side frame 1-3, a first door frame 1-4, and a second door frame 1-5. The first side frame 1-2 and the second side frame 1-3 are fixedly connected to the front and rear ends of the bottom frame 1-1, respectively. The first door frame 1-4 and the second door frame 1-5 are rotatably connected to the left and right ends of the bottom frame 1-1, respectively. The outer mesh grille 3 covers the bottom frame 1-1, the first side frame 1-2, the second side frame 1-3, and the first door frame 7. The outer perimeter mesh 3 of the outer frame 1-4 and the second door frame 1-5 can be fixed to the bottom frame 1-1, the first side frame 1-2, the second side frame 1-3, the first door frame 1-4 or the second door frame 1-5 by welding, riveting or detachable bolts, or the edge of the mesh can be embedded in the preset slots of the bottom frame 1-1, the first side frame 1-2, the second side frame 1-3, the first door frame 1-4 or the second door frame 1-5 to enhance structural stability. The inside of the main structure 1 of the material frame forms a cavity for accommodating multiple layers of material trays 7. The material trays 7 are fixed inside the main structure 1 of the material frame by a fixing device. The bottom wall of the material trays 7 is a hollow mesh.
[0023] It should be noted that, as a preferred embodiment, the first door frame 1-4 is rotatably connected to the left end of the bottom frame 1-1 via a material frame hinge 2. A first door lock pin groove 4-1 is provided at one corner of the free end of the first door frame 1-4, and a first door lock pin rod 6-1 is provided at the upper left corner of the second side frame 1-3. After the first door frame 1-4 is flipped, it is locked by the first door lock pin groove 4-1 and the first door lock pin rod 6-1. Alternatively, in another embodiment, both corners of the free end of the first door frame 1-4 are provided with first door lock pin grooves 4-1, and the upper left corners of the second side frame 1-3 and the first side frame 1-2 are provided with first door lock pin rods 6-1. After the first door frame 1-4 is flipped, it is locked by the first door lock pin grooves 4-1 and the first door lock pin rod 6-1. By using the fixing method of the first door lock pin groove 4-1 and the first door lock pin rod 6-1, the opening and closing of the first door frame 1-4 can be made more convenient, improving the efficiency of use. At the same time, the locking structure can stabilize the structure of the entire material frame and prevent the material tray 7 from slipping off.
[0024] It should be noted that, as a preferred embodiment, the second door frame 1-5 is rotatably connected to the right end of the bottom frame 1-1 via a frame hinge 2. A second door lock pin groove 4-2 is provided at one corner of the free end of the second door frame 1-5, and a second door lock pin rod 6-2 is provided at the upper right corner of the second side frame 1-3. After the second door frame 1-5 is flipped, it is locked by the second door lock pin groove 4-2 and the second door lock pin rod 6-2. Alternatively, in another embodiment, both corners of the free end of the second door frame 1-5 are provided with second door lock pin grooves 4-2, and the upper right corners of the second side frame 1-3 and the first side frame 1-2 are provided with second door lock pin rods 6-2. After the second door frame 1-5 is flipped, it is locked by the second door lock pin grooves 4-2 and the second door lock pin rod 6-2. By using the second door lock pin groove 4-2 and the second door lock pin rod 6-2 to fix the second door frame 1-5, it is easier to open and close, improving the efficiency of use. At the same time, the locking structure can stabilize the entire material frame structure and prevent the material tray 7 from slipping off.
[0025] It should be noted that, as a preferred embodiment, the fixing device includes a material tray pin insertion hole 5 and a material holding tray pin shaft 8. Multiple material tray pin insertion holes 5 are provided, evenly distributed on the vertical supports of the first side frame 1-2 and the second side frame 1-3. The material holding tray pin shaft 8 is disposed on the outer frame of the material holding tray 7. The material holding tray 7 is detachably connected to the main body structure 1 of the material frame via the material holding tray pin shaft 8 and the material tray pin insertion holes 5. Preferably, the material holding tray pin shaft 8 is located at the four corners of the material holding tray 7. In this embodiment, the material holding tray 7 is firmly fixed within the main body structure 1 of the material frame through the cooperation of the material tray pin insertion holes 5 and the material holding tray pin shaft 8, preventing the material holding tray 7 from sliding within the main body structure 1 of the material frame.
[0026] It should be noted that, as a preferred embodiment, the material tray 7 is provided with handles 12 at both its left and right ends. The handles 12 facilitate the handling of the material tray 7. The interior of the material tray 7 is provided with multiple partitions 9, which divide the interior of the material tray 7 into multiple bar compartments 10. These bar compartments 10 are used to hold aluminum alloy extruded bars 13. By separating each aluminum alloy extruded bar 13 with partitions 9, it ensures that each aluminum alloy extruded bar 13 maintains a stable posture during the corrosion process, allowing each aluminum alloy extruded bar 13 to react fully. The evenly distributed bar compartments 10 design allows multiple aluminum alloy extruded bars 13 to be arranged in parallel, avoiding mutual contact or collision and reducing the risk of surface damage.
[0027] It should be noted that, as a preferred embodiment, lifting lugs 11 are provided above the vertical supports of both the first side frame 1-2 and the second side frame 1-3. The lifting lugs 11 are connected to the main structure 1 of the material frame by welding. More preferably, the lifting lugs 11 of the first side frame 1-2 and the lifting lugs 11 of the second side frame 1-3 are symmetrically arranged.
[0028] In use, the first door lock pin groove 4-1 and the first door lock pin rod 6-1 are opened, the first door frame 1-4 is lowered, the second door lock pin groove 4-2 and the second door lock pin rod 6-2 are opened, the second door frame 1-5 is lowered, the material tray 7 is placed into the main structure 1 of the material frame, and the material tray pin shaft 8 on the outer frame of the material tray 7 is inserted into the material tray pin insertion hole 5, thus fixing the material tray 7 into the main structure 1 of the material frame. The material tray 7 can be... After securing multiple material trays 7 layer by layer, the first door frame 1-4 is flipped up and locked using the first door lock pin groove 4-1 and the first door lock pin rod 6-1. The second door frame 1-5 is then flipped up and locked using the second door lock pin groove 4-2 and the second door lock pin rod 6-2. A metallographic corrosion test is then performed. After the test, the opening operation is repeated to remove the material trays 7 layer by layer. This method avoids the need for testers to handle and observe one sample at a time. By using this invention for testing and analysis, one tray of samples can be tested and observed at a time, avoiding visual fatigue that could lead to false positives or missed negatives. This not only improves testing accuracy but also reduces the testing cycle and increases testing efficiency.
[0029] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A macroscopic metallographic etching frame for aluminum alloy extruded bars, characterized in that, The system includes a main frame structure (1), an outer mesh grid (3), and a material tray (7). The main frame structure (1) is a cuboid frame structure. The main frame structure (1) includes a bottom frame (1-1), a first side frame (1-2), a second side frame (1-3), a first door frame (1-4), and a second door frame (1-5). The first side frame (1-2) and the second side frame (1-3) are fixedly connected to the front and rear ends of the bottom frame (1-1), respectively. The first door frame (1-4) and the second door frame (1-5) are fixedly connected to the bottom frame (1-1). The main frame (1-5) is rotatably connected to the left and right ends of the bottom frame (1-1) respectively. The outer mesh (3) covers the outside of the bottom frame (1-1), the first side frame (1-2), the second side frame (1-3), the first door frame (1-4) and the second door frame (1-5) respectively. The material frame main structure (1) forms a cavity inside for accommodating multiple layers of the material tray (7). The material tray (7) is fixed inside the material frame main structure (1) by a fixing device. The bottom wall of the material tray (7) is a hollow mesh.
2. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, The first door frame (1-4) is rotatably connected to the left end of the bottom frame (1-1) via a material frame hinge (2).
3. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, The first door frame (1-4) has a first door lock pin groove (4-1) at one corner of its free end, and the second side frame (1-3) has a first door lock pin rod (6-1) at its upper left corner. After the first door frame (1-4) is flipped over, it is locked by the first door lock pin groove (4-1) and the first door lock pin rod (6-1).
4. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, The second door frame (1-5) is rotatably connected to the right end of the bottom frame (1-1) via a material frame hinge (2).
5. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, The second door frame (1-5) has a second door lock pin groove (4-2) at one corner of its free end, and the second side frame (1-3) has a second door lock pin rod (6-2) at the upper right corner. After the second door frame (1-5) is flipped over, it is locked by the second door lock pin groove (4-2) and the second door lock pin rod (6-2).
6. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, The fixing device includes a material tray pin insertion hole (5) and a material holding tray pin shaft (8). There are multiple material tray pin insertion holes (5), which are evenly arranged on the vertical supports of the first side frame (1-2) and the second side frame (1-3). The material holding tray pin shaft (8) is arranged on the outer frame of the material holding tray (7). The material holding tray (7) is detachably connected to the main structure (1) of the material frame through the material holding tray pin shaft (8) and the material tray pin insertion hole (5).
7. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, The material tray (7) is provided with material tray handles (12) at both the left and right ends.
8. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, The material tray (7) is provided with multiple partitions (9) inside, which divide the inside of the material tray (7) into multiple bar compartments (10), which are used to hold aluminum alloy extruded bars (13).
9. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 1, characterized in that, Lifting lugs (11) are provided above the vertical supports of the first side frame (1-2) and the second side frame (1-3).
10. The macroscopic metallographic etching frame for aluminum alloy extruded bars according to claim 9, characterized in that, The lifting lug (11) is connected to the main structure (1) of the material frame by welding.