Aluminum alloy tensile specimen die
By adjusting the motors of the driving and reciprocating components, and combining them with silicon carbide ceramic filters and buffer pads, the problems of deformation and sampling difficulties in the demolding process of aluminum alloy tensile test specimen molds were solved, achieving efficient and stable production of aluminum alloy tensile test specimens.
Patent Information
- Application Number
- CN202521944015.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-10
AI Technical Summary
Existing aluminum alloy tensile specimen metal molds are difficult to adapt to ultra-thin-walled dumbbell-shaped specimens during demolding, resulting in deformation, sampling difficulties, affecting detection accuracy and efficiency, and potentially causing surface oxidation and structural damage.
By employing a push component and a reciprocating component in conjunction with a motor adjustment, and through slow, short-distance initial ejection and rapid, long-distance ejection in the later stages, combined with a silicon carbide ceramic filter and buffer pad design, flexible demolding and efficient production are achieved.
It reduces the risk of sample deformation, improves demolding efficiency and production stability, ensures sample purity and testing accuracy, and reduces operational complexity and scrap risk.
Smart Images
Figure CN224681932U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum alloy tensile test specimen production and manufacturing technology, specifically to a metal mold for aluminum alloy tensile test specimens. Background Technology
[0002] In high-end manufacturing fields such as aerospace and electronic packaging, ultra-thin-walled aluminum alloy tensile specimens are crucial for evaluating the mechanical properties of materials. Their quality directly impacts the reliability verification of core components such as spacecraft structural parts and electronic packaging shells. These specimens are typically extremely thin, with a dumbbell-shaped cross-section, and even thinner at the waist, resulting in poor overall rigidity. During the casting process, the contact between the molten metal and the cavity wall creates significant clamping forces, posing special requirements for the demolding process and exacerbating the difficulty of mold opening and sampling.
[0003] In existing technologies, the demolding mechanism of aluminum alloy tensile test specimen metal molds mostly adopts a pin-driven method with fixed stroke and speed, which is difficult to adapt to the demolding requirements of such ultra-thin-walled dumbbell-shaped specimens. If the initial ejection speed is too fast and the stroke is too large, the impact force of the ejector pin can easily cause the waist of the specimen, which is weak in rigidity, to bend and deform. After the mold is opened, the specimen is abnormal in shape and locally stuck in the cavity. When sampling, the angle needs to be adjusted repeatedly to remove it, which can easily cause further bending of the waist and directly affect the accuracy of subsequent testing. To avoid deformation, a slow demolding speed is adopted throughout the process. Although it can reduce the risk of deformation, it will prolong the residence time of the specimen in the high-temperature cavity. This not only leads to low production efficiency, but may also cause local oxidation of the specimen surface. Moreover, after the specimen cools and shrinks, it fits more tightly with the cavity. After the mold is opened, sampling requires external force to pry it. This is not only cumbersome to operate, but also easy to scratch the specimen surface or damage the matrix structure under the oxide layer. Ultimately, it will destroy the original mechanical properties of the material, increase the sampling difficulty and the risk of specimen scrapping.
[0004] In view of the above, this application is hereby submitted. Utility Model Content
[0005] The purpose of this invention is to provide a metal mold for aluminum alloy tensile test specimens to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, this utility model provides an aluminum alloy tensile test specimen metal mold, including a mounting base, a lower mold mounted on the top of the mounting base, a buffer pad laid on the bottom of the lower mold, and a demolding mechanism installed inside the mounting base. The demolding mechanism includes a pushing component and a reciprocating component. The pushing component includes a first motor mounted on the inner wall of the mounting base. The output end of the first motor is connected to a rotating shaft. An adjusting turntable is slidably connected to the outer wall of the rotating shaft. A connecting rod is rotatably connected to the side of the adjusting turntable away from the first motor. A traction turntable is rotatably connected to the end of the connecting rod away from the adjusting turntable. A slot is opened in the middle of the traction turntable. A connecting rod is fixedly connected to the inner wall of the slot. The traction turntable is rotatably connected to the traction turntable through the slot and the connecting rod. A swing arm is slidably connected to one outer wall of the traction turntable. A pushing frame is fixedly connected to the end of the swing arm away from the traction turntable. Pins are installed on both sides of the top of the pushing frame.
[0007] Furthermore, the reciprocating assembly includes a second motor installed on the inner wall of the mounting base. The output end of the second motor is connected to a rotating plate. A rotating wheel is rotatably connected to one side of the top of the rotating plate. A guide rail is abutted against the outer wall of the rotating wheel. An auxiliary guide rod and a push rod are fixedly connected to both sides of the guide rail, respectively. An adjusting disc is rotatably connected to the end of the push rod away from the guide rail. A sliding groove is opened on the outer wall of the adjusting disc. The adjusting disc is slidably connected to one side of the outer wall of the adjusting disc through the sliding groove.
[0008] Furthermore, guide pillars are slidably connected to the top four corners of the mounting base, and an upper mold is installed on the top of the four guide pillars.
[0009] Furthermore, an injection port is provided on one side of the outer wall of the upper mold, and a filter screen is connected to the inner wall of the injection port. The filter screen is made of silicon carbide ceramic.
[0010] Furthermore, the outer wall of the ejector pin is slidably connected to the mounting base and the inner wall of the lower mold, the outer wall of the first motor away from the output end is fixedly connected to the inner wall of the mounting base, and a ball block is installed on the side of the swing arm close to the traction turntable, and the swing arm is slidably connected to the outer wall of one side of the traction turntable through the ball block.
[0011] Furthermore, a cavity is formed on the inner wall of the top of the lower mold, and an venting groove is formed on the outer wall of the bottom end of the upper mold corresponding to the cavity formed on the inner wall of the top of the lower mold.
[0012] Furthermore, the outer wall of the auxiliary guide rod is slidably connected to the inner wall of the mounting base, and the outer wall of the push rod is slidably connected to the inner wall of the mounting base.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. By using the reciprocating components in conjunction with the adjustable turntable and the speed adjustment of the first motor, the initial clamping force between the molten metal and the cavity wall can be gently broken through the slow, short-distance ejection in the early stage, avoiding direct stress impact on the weak waist of the ejector pin, thus reducing the risk of bending deformation from the root. After the initial release is completed in the early stage, the contact time between the sample and the high-temperature cavity is shortened by the fast, long-distance ejection in the later stage, avoiding local oxidation caused by slow speed, increasing demolding efficiency, and facilitating sampling.
[0015] 2. By coordinating the reciprocating components, the overall adjustment can be made without stopping the machine for maintenance, adapting to batch continuous production scenarios, reducing production interruptions caused by downtime for adjustment, and improving overall production stability. Attached Figure Description
[0016] Figure 1 A schematic diagram of the overall structure of a metal mold for an aluminum alloy tensile test specimen.
[0017] Figure 2 This is a schematic diagram of the overall structure of the demolding mechanism in a metal mold for an aluminum alloy tensile test specimen.
[0018] Figure 3 This is a schematic diagram of the internal structure of a traction turntable in a metal mold for an aluminum alloy tensile test specimen.
[0019] Figure 4 This is a side view of the demolding mechanism in a metal mold for an aluminum alloy tensile specimen.
[0020] Figure 5 This is a schematic diagram of the reciprocating component in a metal mold for an aluminum alloy tensile test specimen.
[0021] In the diagram: 1. Mounting base; 2. Lower mold; 3. First motor; 4. Rotating shaft; 5. Adjusting turntable; 6. Connecting rod; 7. Traction turntable; 8. Slot; 9. Connecting rod; 10. Swing arm; 11. Push frame; 12. Ejector pin; 13. Second motor; 14. Rotating plate; 15. Rotating wheel; 16. Guide rail; 17. Auxiliary guide rod; 18. Push rod; 19. Adjusting plate; 20. Sliding groove; 21. Guide column; 22. Upper mold. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figures 1-5This utility model provides a technical solution: a metal mold for aluminum alloy tensile specimens, including a mounting base 1, a lower mold 2 mounted on the top of the mounting base 1, and a buffer pad laid on the bottom of the lower mold 2. The mounting base 1 provides rigid support for the lower mold 2 to ensure the stability of the cavity position. The buffer pad absorbs the impact force during demolding, preventing the lower mold 2 from rigidly colliding with the mounting base 1 and causing vibration, thus reducing secondary deformation of the specimen due to vibration. A demolding mechanism is installed inside the mounting base 1, which includes a pushing component and a reciprocating component. The pushing component includes a first motor 3 mounted on the inner wall of the mounting base 1. The output end of the first motor 3 is connected to a rotating shaft 4. After the first motor 3 starts, it drives the rotating shaft 4 to rotate synchronously. An adjusting turntable 5 is slidably connected to the outer wall of the rotating shaft 4, synchronously transmitting the circumferential motion of the rotating shaft 4 to the adjusting turntable 5. The adjusting turntable 5 can make a relative horizontal linear motion on the outer wall of the rotating shaft 4. The side of the adjusting turntable 5 away from the first motor 3 rotates... A connecting rod 6 is dynamically connected. The end of the connecting rod 6 away from the adjusting turntable 5 is rotatably connected to a traction turntable 7. A slot 8 is opened in the middle of the traction turntable 7. A connecting rod 9 is fixedly connected to the inner wall of the slot 8. The traction turntable 7 is rotatably connected to the traction turntable 7 through the slot 8 and the connecting rod 9. By adjusting the displacement of the turntable 5 by different distances, the tilt angle of the traction turntable 7 changes. At this time, the rotating shaft 4 drives the traction turntable 7 to rotate. A swing arm 10 is slidably connected to one side of the outer wall of the traction turntable 7. The traction turntable 7 converts the rotational motion into swing motion, and at the same time drives the swing arm 10 to make horizontal displacement. The displacement distance of the swing arm 10 will also be different according to the different tilt angles of the traction turntable 7. A push frame 11 is fixedly connected to the end of the swing arm 10 away from the traction turntable 7. A pin 12 is installed on both sides of the top of the push frame 11. The swing arm 10 drives the push frame 11 to move synchronously. The push frame 11 ensures that the pins 12 on both sides move in the same direction, so as to realize the synchronous pushing of the two ends of the sample.
[0024] See Figure 2 , Figure 4 , Figure 5The reciprocating assembly includes a second motor 13 mounted on the inner wall of the mounting base 1. The output end of the second motor 13 is connected to a rotating plate 14. After the second motor 13 starts, its output shaft drives the rotating plate 14 to rotate in a circular motion. A rotating wheel 15 is rotatably connected to one side of the top of the rotating plate 14. A guide rail 16 is connected to the outer wall of the rotating wheel 15. The rotating wheel 15 at the top of the rotating plate 14 rotates synchronously with the rotating plate 14. When the rotating wheel 15 rotates, it pushes the guide rail 16 to move horizontally in a linear motion to the left and right. The guide rail 16 has guide rails on both sides... An auxiliary guide rod 17 and a push rod 18 are fixedly connected. The end of the push rod 18 away from the guide slide rail 16 is rotatably connected to an adjusting plate 19. The auxiliary guide rod 17 ensures the sliding accuracy of the guide slide rail 16 and can only move within the range of motion. The push rod 18 transmits the sliding displacement to the adjusting plate 19. The outer wall of the adjusting plate 5 is provided with a sliding groove 20. The adjusting plate 5 is slidably connected to one side of the outer wall of the adjusting plate 19 through the sliding groove 20. The displacement distance of the adjusting plate 5 is changed by the sliding of the adjusting plate 19, thereby controlling the movement stroke of the ejector pin 12 in the pushing assembly.
[0025] See Figure 1 The mounting base 1 has guide posts 21 slidably connected to its top four corners. The top of the four guide posts 21 is equipped with an upper mold 22. The outer wall of one side of the upper mold 22 has a pouring port. The inner wall of the pouring port is connected to a filter screen. The filter screen is made of silicon carbide ceramic. The four guide posts 21 are vertically distributed at the four corners of the top of the mounting base 1, arranged in a rectangular symmetrical manner. They can freely extend and retract in the vertical direction. The silicon carbide ceramic filter screen can filter out oxide slag and non-metallic inclusions in the aluminum liquid, preventing impurities from entering the cavity and forming defects, such as stress concentration fracture during tensile testing caused by inclusions. In addition, the silicon carbide ceramic filter screen is resistant to high temperature and can be in contact with the aluminum liquid for a long time without melting or deforming, and does not react with the aluminum liquid, thus avoiding the introduction of new impurities and ensuring the purity of the sample.
[0026] See Figure 1 , Figure 2 The outer wall of the ejector pin 12 is slidably connected to the inner wall of the mounting base 1 and the lower mold 2. The inner wall of the mounting base 1 provides support and guidance for the ejector pin 12, restricts horizontal displacement, and ensures that the top of the ejector pin 12 acts vertically on the bottom of the sample, avoiding lateral force that could cause demolding failure. At the same time, the two ejector pins 12 avoid damaging the waist detection area. The outer wall of the first motor 3 on the side away from the output end is fixedly connected to the inner wall of the mounting base 1, rigidly fixing the first motor 3 and preventing displacement due to vibration during operation, thus ensuring transmission accuracy.
[0027] See Figure 2A ball block is installed on the side of the swing arm 10 near the traction turntable 7. The swing arm 10 is slidably connected to the outer wall of one side of the traction turntable 7 through the ball block. The fixed connection between the ball block and the swing arm 10 forms a rigid whole with the ball block and the swing arm 10, ensuring that the swing of the traction turntable 7 can be efficiently transmitted to the swing arm 10, avoiding power loss caused by the loosening of the ball block during the movement, and realizing the conversion between the swing motion of the traction turntable 7 and the vertical motion of the swing arm 10.
[0028] See Figure 1 The lower mold 2 has a cavity on its inner wall at the top. The upper mold 22 has an exhaust groove on the outer wall at the bottom of the cavity corresponding to the cavity on the inner wall at the top of the lower mold 2. The cavity of the lower mold 2 is the forming space for the aluminum alloy melt, which determines the final shape and size of the sample. The exhaust groove can quickly discharge the air inside the cavity and the gas generated by the oxidation of the aluminum melt during the aluminum melt pouring process, avoiding the formation of defects such as pores and looseness by the gas being trapped in the aluminum melt.
[0029] Working principle: The first motor 3 drives the rotating shaft 4 to rotate, which in turn drives the adjusting turntable 5 to rotate. The connecting rod 6 causes the traction turntable 7 to swing around the connecting rod 9 as the fulcrum. The traction turntable 7 drives the swing arm 10 to move through the ball block, which in turn causes the ejector pin 12 at the top of the push frame 11 to vertically push the sample along the guide structure of the mounting base 1 and the lower mold 2. The second motor 13 drives the rotating plate 14 to rotate, which drives the rotating wheel 15 to push the guide slide rail 16 to slide horizontally. The sample slides in the sliding groove 20 of the adjusting turntable 5 through the push rod 18 and the adjusting plate 19, changing the position of the adjusting turntable 5 to adjust the stroke of the ejector pin 12, so as to achieve smooth demolding of the sample. The buffer pad at the bottom of the lower mold 2 absorbs the vibration and avoids secondary deformation of the sample. The aluminum alloy melt enters the cavity after being filtered by the silicon carbide ceramic filter screen at the pouring port of the upper mold 22. The filter screen intercepts impurities and is heat-resistant and does not react, ensuring the purity of the sample. The venting groove of the upper mold 22 is simultaneously connected to the cavity to discharge the gas during pouring.
[0030] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Furthermore, since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.
[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A metal mold for tensile testing of aluminum alloy, comprising a mounting base (1), characterized in that: A lower mold (2) is installed at the top of the mounting base (1), and a buffer pad is laid at the bottom of the lower mold (2). A demolding mechanism is installed inside the mounting base (1). The demolding mechanism includes a pushing component and a reciprocating component. The pushing component includes a first motor (3) installed on the inner wall of the mounting base (1). The output end of the first motor (3) is connected to a rotating shaft (4). An adjusting turntable (5) is slidably connected to the outer wall of the rotating shaft (4). A connecting rod (6) is rotatably connected to the side of the adjusting turntable (5) away from the first motor (3). The connecting rod (6) is rotatably connected to the side away from the first motor (3). A traction turntable (7) is rotatably connected to one end of the adjusting turntable (5). A slot (8) is provided in the middle of the traction turntable (7). A connecting rod (9) is fixedly connected to the inner wall of the slot (8). The traction turntable (7) is rotatably connected to the traction turntable (7) through the slot (8) and the connecting rod (9). A swing arm (10) is slidably connected to one side of the outer wall of the traction turntable (7). A push frame (11) is fixedly connected to one end of the swing arm (10) away from the traction turntable (7). A push pin (12) is installed on both sides of the top of the push frame (11).
2. The aluminum alloy tensile specimen metal mold as described in claim 1, characterized in that: The reciprocating assembly includes a second motor (13) installed on the inner wall of the mounting base (1). The output end of the second motor (13) is connected to a rotating plate (14). A rotating wheel (15) is rotatably connected to one side of the top of the rotating plate (14). A guide rail (16) is abutted against the outer wall of the rotating wheel (15). An auxiliary guide rod (17) and a push rod (18) are fixedly connected to both sides of the guide rail (16). An adjusting disc (19) is rotatably connected to one end of the push rod (18) away from the guide rail (16). A sliding groove (20) is provided on the outer wall of the adjusting disc (5). The adjusting disc (5) is slidably connected to one side of the outer wall of the adjusting disc (19) through the sliding groove (20).
3. The aluminum alloy tensile specimen metal mold as described in claim 2, characterized in that: The top four corners of the mounting base (1) are slidably connected with guide posts (21), and the top of the four guide posts (21) is equipped with an upper mold (22).
4. The aluminum alloy tensile specimen metal mold as described in claim 3, characterized in that: The upper mold (22) has an injection port on one side of its outer wall, and a filter screen is connected to the inner wall of the injection port. The filter screen is made of silicon carbide ceramic.
5. The aluminum alloy tensile specimen metal mold as described in claim 4, characterized in that: The outer wall of the ejector pin (12) is slidably connected to the inner wall of the mounting base (1) and the lower mold (2), and the outer wall of the first motor (3) on the side away from the output end is fixedly connected to the inner wall of the mounting base (1).
6. The aluminum alloy tensile specimen metal mold as described in claim 5, characterized in that: A ball block is installed on the side of the swing arm (10) near the traction turntable (7), and the swing arm (10) is slidably connected to the outer wall of one side of the traction turntable (7) through the ball block.
7. The aluminum alloy tensile specimen metal mold as described in claim 6, characterized in that: The outer wall of the auxiliary guide rod (17) is slidably connected to the inner wall of the mounting base (1), and the outer wall of the push rod (18) is slidably connected to the inner wall of the mounting base (1).
8. The aluminum alloy tensile specimen metal mold as described in claim 7, characterized in that: The lower mold (2) has a cavity on its inner wall at the top, and the upper mold (22) has an exhaust groove on the outer wall at the bottom of the cavity on the inner wall at the top of the lower mold (2).