Extrusion device for high-strength magnesium alloys

Abstract

This invention relates to the field of extrusion die technology, and more specifically discloses an extrusion device for high-strength magnesium alloy, including a machine body. The machine body includes a bottom beam, with columns fixedly connected to the four corners of the bottom beam. An upper beam is fixedly connected to the top of the columns, and a main hydraulic cylinder is slidably connected inside the upper beam. A column is fixedly connected to the bottom of the main hydraulic cylinder, and a slider is slidably connected between the columns. A moving component is installed below the slider, and an upper die is slidably connected below the moving component. The slider includes a sliding plate, which is slidably connected to the four columns. A protrusion is fixedly connected to the bottom of the sliding plate. By providing a moving component, this invention facilitates the movement of the gears driven by the motor, which moves the toothed jaws and fixed claws to allow the notch to abut against the clamped block for installation. During disassembly, the motor is started to separate the notch from the clamped block. The operation is simple, the die can be changed quickly, downtime is reduced, and processing efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of extrusion die technology, and more specifically to an extrusion apparatus for high-strength magnesium alloys. Background Technology

[0002] Currently, high-strength magnesium alloy extrusion die technology is continuously developing towards high performance, long service life, and intelligentization. In terms of die structure design, innovations in composite forming processes, such as the synergistic effect of multi-directional loading and rotary extrusion, effectively improve the internal microstructure uniformity of magnesium alloy components and significantly enhance their mechanical properties, making them particularly suitable for the integral forming of complex structural parts. In terms of material selection, high-strength die steel, after optimized heat treatment, possesses both high hardness and good resistance to thermal fatigue. Combined with advanced surface modification technology, this significantly extends the service life of the die under high temperature and high pressure environments. The application of intelligent control technology is crucial. By integrating a real-time temperature and pressure monitoring and feedback system, process parameters during the extrusion process can be precisely controlled to ensure the dimensional accuracy and surface quality of magnesium alloy products. Furthermore, for the forming requirements of large components, multi-cavity dies and hot runner designs optimize the material flow path, improve material utilization, and reduce the internal defect rate of products, further releasing the application potential of high-strength magnesium alloys in aerospace, automotive lightweighting, and other fields.

[0003] Chinese patent CN109127756B discloses a high-strength magnesium alloy extrusion die, including a die punch; an outer core mold is set inside the die sleeve, and a rotatable inner core mold is set inside the outer core mold. The magnesium alloy to be extruded is set inside the rotatable inner core mold, and the die punch is set at the upper end of the rotatable inner core mold. A heating device is also set at the upper end of the die sleeve, which heats the outer core mold, the rotatable inner core mold, and the magnesium alloy to be extruded. A set of thermocouple temperature measuring devices is also set at the lower end of the die sleeve. The thermocouple temperature measuring devices are connected to a temperature control system, and the temperature control system is electrically connected to the heating device. This invention can directly obtain ultrafine magnesium alloy material, has the characteristics of simple operation, does not damage the material shape, can be repeatedly extruded, and can obtain high-strength magnesium alloy in a single extrusion process.

[0004] Currently, existing extrusion dies are often difficult to disassemble quickly after installation, resulting in a long die-changing process. Frequent machine shutdowns are required when processing different models of products, which not only affects production efficiency but also makes it impossible to remove the dies for cleaning in a timely manner after use. Due to the failure to disassemble and clean the dies in a timely manner, contaminants such as lubricants, release agents, and coolants adhering to the outer periphery of the lower die accumulate over a long period of time and can easily spread to the forming area through die gaps or contact surfaces, thereby affecting the forming quality of subsequent products. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an extrusion device for high-strength magnesium alloys to solve the problems existing in the background art.

[0006] The present invention provides the following technical solution: an extrusion device for high-strength magnesium alloy, comprising a machine body including a bottom beam, columns fixed at the four corners of the bottom beam, an upper beam fixed at the top of the columns, and a main oil cylinder installed inside the upper beam; A slider is slidably connected between the columns. The slider includes a sliding plate and a protrusion fixed to the bottom of the sliding plate. A clamping block is fixedly connected to the bottom of the protrusion. Below the slider is a moving component, which includes a motor fixedly connected to the upper mold, a gear connected to the motor shaft, a toothed condition meshing with the gear and slidably connected to the upper mold, and a fixed claw fixed to the tail of the toothed condition, with a notch at the bottom of the fixed claw; The upper module is detachably connected to the slider via a movable component; When the notch is moved by the motor to be in close contact with the clamped block, the upper mold and the slider are fixedly connected. When the notch separates from the clamped block, the upper mold can be quickly disassembled and replaced; The bottom beam is equipped with a lower mold, a cleaning component is slidably connected to the outside of the lower mold, and an elastic component is movably connected to the bottom of the cleaning component. The upper mold extrudes and forms the magnesium alloy model to be processed inside the lower mold. The upper mold includes a support plate, and multiple pressure rods are fixedly connected to the bottom of the support plate. When the upper mold descends, the pressure rods press the cleaning part down and clean the lower mold. When the upper mold rises, the elastic component drives the cleaning component to reset and clean again; Furthermore, the outer cylinder body of the main cylinder is fixedly connected to the upper beam, the upper mold is located below the moving component, the slide plate is slidably connected to the four columns, the protrusion is within the cross-sectional area of ​​the clamped block, the top of the bottom beam is provided with a circumferential array of guide holes, the bottom of the upper mold is equipped with a buffer, and the elastic component is installed inside the guide holes.

[0007] Furthermore, the top two sides of the support plate are provided with symmetrical T-shaped grooves, and the bottom of the support plate is fixedly connected with a plurality of circumferentially arrayed limiting rods. The bottom of the limiting rods is fixedly connected with a mounting column, and one side of the mounting column is provided with a mounting hole. The pressure rod is directly opposite the cleaning component, and a pressure block is fixedly connected to the bottom center of the support plate.

[0008] Furthermore, the toothed condition includes a toothed portion, the top of which is fixedly connected to a T-shaped block, which is slidably connected to a T-slot.

[0009] Furthermore, the buffer component includes a buffer spring, one end of which is fixedly connected to the bottom of the bearing plate. The buffer spring is sleeved on the outside of the limiting rod, and the cylinder body of the first hydraulic cylinder is fixedly connected inside the mounting hole.

[0010] Furthermore, the cleaning component includes a liquid storage frame, the shape of which is the same as that of the lower mold component. The inner side of the liquid storage frame is provided with multiple arrayed bristles, and the inside of the bristles is provided with a liquid outlet. The liquid outlet connects the liquid storage frame and the bristles. The top of the liquid outlet is provided with an injection port, and the position of the injection port is staggered from that of the pressure rod to facilitate the pressure rod to squeeze the liquid storage frame.

[0011] Furthermore, the elastic component includes a pressure-receiving part, a guide part is fixedly connected to the bottom of the pressure-receiving part, the guide part is slidably connected to the guide hole, and a rebound spring is provided between the guide part and the bottom of the guide hole.

[0012] Furthermore, the top of the lower mold body is provided with a forming hole, which is opposite to the pressure block and has the same size. The four corners of the top of the lower mold body are provided with limiting holes, which are opposite to the limiting rods and have the same diameter.

[0013] The technical effects and advantages of this invention are as follows: 8. The present invention, by providing a movable component, facilitates the movement of the gear driven by the motor, thereby moving the gear and the fixed claw, so that the notch abuts against the clamped block to complete the installation. When disassembling, the motor is started to separate the notch from the clamped block. The operation is simple, the mold can be changed quickly, downtime is reduced, and the processing efficiency is effectively improved.

[0014] 9. The present invention, by providing a cleaning component, facilitates the downward pressure of the pressure rod on the cleaning component, causing the bristles to flexibly rub against the outer mold wall of the lower mold, allowing the cleaning agent to flow out for cleaning. The cleaning is repeated when the mold rises, which can promptly remove contaminants from the outer side of the lower mold, prevent them from spreading to the molding area, and ensure product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram at point a; Figure 4 This is a schematic diagram of the assembly structure of the slider, moving component and buffer of the present invention; Figure 5 This is a schematic diagram of the cleaning component structure of the present invention; Figure 6 This is a schematic diagram of the slider structure of the present invention; Figure 7 This is a schematic diagram of the tooth condition structure of the present invention; Figure 8 This is a schematic diagram of the upper mold component structure of the present invention.

[0016] The attached diagram is labeled as follows: 1. Body; 101. Bottom beam; 102. Column; 103. Upper beam; 104. Main hydraulic cylinder; 105. Guide hole; 2. Slider; 201. Slide plate; 202. Protrusion; 203. Clamped block; 3. Upper mold component; 301. Bearing plate; 302. T-slot; 303. Limiting rod; 304. Mounting column; 305. Mounting hole; 306. Pressure rod; 307. Pressure block; 4. Moving component; 401. Motor; 402. Gear; 403. Toothed components; 4031, Toothed part; 4032, T-block; 404, Fixing claw; 405, Notch; 5, Buffer component; 501, Buffer spring; 502, First oil cylinder; 6, Cleaning component; 601, Liquid storage frame; 602, Brush bristles; 603, Liquid outlet; 604, Liquid injection port; 7, Elastic component; 701, Pressure-bearing part; 702, Guide part; 703, Rebound spring; 8, Lower mold component; 801, Lower mold body; 802, Forming hole; 803, Limiting hole. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The high-strength magnesium alloy extrusion device involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Reference Figure 1 , Figure 2 , Figure 4 and Figure 6 The present invention provides a high-strength magnesium alloy extrusion device, including a machine body 1, the machine body 1 including a bottom beam 101, columns 102 fixedly connected to the four corners of the bottom beam 101, an upper beam 103 fixedly connected to the top of the columns 102, a main oil cylinder 104 slidably connected inside the upper beam 103, columns 102 fixedly connected to the bottom of the main oil cylinder 104, a slider 2 slidably connected between the four columns 102, a moving component 4 installed below the slider 2, and an upper die 3 slidably connected below the moving component 4. The slider 2 includes a slide plate 201, which is slidably connected to four columns 102. The bottom of the slide plate 201 is fixedly connected to a protrusion 202, and the bottom of the protrusion 202 is fixedly connected to a clamping block 203. The protrusion 202 is within the cross-sectional area of ​​the clamping block 203. The moving component 4 includes a motor 401. The housing of the motor 401 is fixedly connected to the upper mold 3. A gear 402 is fixedly connected to the rotating shaft of the motor 401. A tooth condition 403 is meshed with the bottom of the gear 402. The tooth condition 403 is slidably connected to the upper mold 3. A fixing claw 404 is fixedly connected to the tail of the tooth condition 403. A notch 405 is opened at the bottom of the fixing claw 404. When the notch 405 can move to fit tightly against the clamped block 203, it can prevent the upper mold 3 from falling off. In this embodiment, it should be specifically noted that the motor 401 is connected to the external power source. The motor 401 is an existing structure, and the specific connection method of the motor 401 will not be described in detail in this embodiment.

[0019] Reference Figures 1-3 The bottom beam 101 has a guide hole 105 arranged in a circular array at the top. A buffer 5 is installed at the bottom of the upper mold 3. A lower mold 8 is installed at the top of the bottom beam 101. A cleaning component 6 is slidably connected to the outside of the lower mold 8. An elastic component 7 is movably connected to the bottom of the cleaning component 6. The elastic component 7 is installed inside the guide hole 105.

[0020] In this embodiment, it should be specifically noted that the lower mold 8 and the bottom beam 101 are detachably connected.

[0021] Reference Figure 1 , Figure 2 and Figure 8 The upper mold 3 includes a support plate 301. The top two sides of the support plate 301 are provided with symmetrical T-shaped grooves 302. The bottom of the support plate 301 is fixedly connected with a plurality of circumferentially arrayed limiting rods 303. The bottom of the limiting rods 303 is fixedly connected with a mounting post 304. One side of the mounting post 304 is provided with a mounting hole 305. The bottom of the support plate 301 is fixedly connected with a plurality of circumferentially arrayed pressure rods 306. The pressure rods 306 are directly opposite the cleaning component 6. The bottom center of the support plate 301 is fixedly connected with a pressure block 307.

[0022] In this embodiment, it should be specifically explained that when the pressure rod 306 also descends continuously with the upper mold 3, and when the pressure rod 306 comes into contact with the cleaning component 6 and continuously presses the cleaning component 6, the cleaning component 6 cleans the outer mold wall of the lower mold 8.

[0023] Reference Figure 4 and Figure 7 The toothed condition 403 includes a toothed part 4031, and a T-shaped block 4032 is fixedly connected to the top of the toothed part 4031. The T-shaped block 4032 is slidably connected to the T-shaped groove 302.

[0024] In this embodiment, it should be specifically noted that the T-block 4032 and the T-slot 302 are tightly fitted to reduce the probability of vibration of the upper mold 3.

[0025] Reference Figure 1 , Figure 2 and Figure 4 The buffer component 5 includes a buffer spring 501. One end of the buffer spring 501 is fixedly connected to the bottom of the bearing plate 301. The buffer spring 501 is sleeved on the outside of the limiting rod 303. The cylinder body of the first oil cylinder 502 is fixedly connected inside the mounting hole 305.

[0026] In this embodiment, it should be specifically noted that: in its natural state, the length of the buffer spring 501 does not exceed the limit rod 303, which facilitates mold changing.

[0027] Reference Figure 1 , Figure 2 and Figure 5 The cleaning component 6 includes a liquid storage frame 601, which has the same shape as the lower mold component 8. The inner side of the liquid storage frame 601 is provided with multiple arrayed bristles 602. The inside of the bristles 602 is provided with a liquid outlet 603, which connects the liquid storage frame 601 and the bristles 602. The top of the liquid outlet 603 is provided with an injection port 604, which is offset from the position of the pressure rod 306 to facilitate the pressure of the pressure rod 306 on the liquid storage frame 601.

[0028] In this embodiment, it should be specifically noted that the material of the bristles 602 is a flexible material, and the cleaning agent will not flow out actively under the tension of the bristles 602 on the cleaning agent.

[0029] Reference Figure 2 and Figure 3 The elastic component 7 includes a pressure-receiving part 701, and a guide part 702 is fixedly connected to the bottom of the pressure-receiving part 701. The guide part 702 is slidably connected to the guide hole 105, and a rebound spring 703 is provided between the guide part 702 and the bottom of the guide hole 105.

[0030] In this embodiment, it should be specifically explained that: as the pressure rod 306 descends along with the upper mold 3, when the pressure rod 306 comes into contact with the cleaning part 6 and continuously presses the cleaning part 6, the pressure-bearing part 701 below the cleaning part 6 is pressed and, together with the guide part 702, compresses the rebound spring 703, causing elastic deformation. The cleaning part 6 loses the pressure of the pressure rod 306, and the pressure-bearing part 701 and the guide part 702 lift the cleaning part 6 under the rebound force of the rebound spring 703.

[0031] Reference Figure 1 and Figure 2 The lower mold part 8 includes a lower mold body 801. The top of the lower mold body 801 is provided with a forming hole 802. The forming hole 802 is opposite to the pressure block 307 and has the same size. The four corners of the top of the lower mold body 801 are provided with limiting holes 803. The limiting holes 803 are opposite to the limiting rod 303 and have the same diameter.

[0032] In this embodiment, it should be specifically explained that: the limiting rod 303 also enters the limiting hole 803 and slides against the limiting hole 803. When the pressure block 307 contacts the magnesium alloy to be pressed, an impact occurs. At this time, the elastic deformation of the buffer spring 501 reduces this impact, and the friction between the limiting rod 303 and the limiting hole 803 can further disperse the impact energy, avoiding local force concentration on the upper mold 3 and the lower mold 8.

[0033] The specific steps are as follows: First, use a forklift to move the upper mold 3 to the installation position, start the motors 401 on both sides, the shaft of the motor 401 drives the gear 402 fixedly connected to it to rotate, the gear 402 drives the tooth condition 403 below the gear 402 and the fixed claw 404 to move closer to the clamped block 203. When the notches 405 on both sides abut against the clamped block 203, the mold is installed. Then, place the high-strength magnesium alloy to be extruded into the forming hole 802. Then the pressing begins, and the main hydraulic cylinder 104 is activated. The piston rod of the main hydraulic cylinder 104 drives the slider 2, the upper mold 3, the moving component 4, and the buffer 5 to move downward. Subsequently, the mounting post 304 first enters the interior of the limiting hole 803. The buffer spring 501 contacts the lower mold 801 and undergoes elastic deformation due to continuous descent. Then, the limiting rod 303 also enters the limiting hole 803 and rubs and slides against the limiting hole 803. When the pressure block 307 contacts the magnesium alloy to be pressed, an impact occurs. At this time, the elastic deformation of the buffer spring 501 reduces this impact, and the friction between the limiting rod 303 and the limiting hole 803 further disperses the impact energy, avoiding localized force concentration on the upper mold 3 and the lower mold 8. As the pressure rod 306 descends along with the upper mold part 3, when the pressure rod 306 comes into contact with the cleaning part 6 and continuously presses the cleaning part 6, the pressure-bearing part 701 below the cleaning part 6 is pressed and the guide part 702 presses the rebound spring 703 to undergo elastic deformation. At this time, the cleaning part 6 descends, and the brush bristles 602 flexibly rub against the outer mold wall of the lower mold body 801. The cleaning agent inside the brush bristles 602 also flows out from the liquid outlet 603 due to friction, thus cleaning the outer mold wall of the lower mold body 801. After pressing is completed, the main oil cylinder 104 drives the slider 2, upper mold 3, moving component 4 and buffer 5 to rise. At this time, the cleaning component 6 loses the pressure of the pressure rod 306. The pressure part 701 and the guide part 702 lift the cleaning component 6 under the rebound force of the rebound spring 703. During this process, the outer mold wall of the lower mold body 801 is cleaned again. When it is necessary to replace the upper mold part 3, the first hydraulic cylinder 502 is activated. The extension of the first hydraulic cylinder 502 blocks the descent range of the buffer spring 501, preventing the buffer spring 501 from extending below the mounting column 304 due to the acceleration generated during the movement of the upper mold part 3, which would cause it to get caught on external objects and affect the mold replacement. Subsequently, the forklift is activated to hold the upper mold part 3, and the motor 401 is activated to separate the notch 405 from the clamped block 203. Finally, the upper mold part 3 is replaced.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An extrusion apparatus for high-strength magnesium alloy, comprising a machine body (1), characterized in that: The machine body (1) includes a bottom beam (101), columns (102) fixed at the four corners of the bottom beam (101), an upper beam (103) fixed at the top of the columns (102), and a main oil cylinder (104) installed inside the upper beam (103). A slider (2) is slidably connected between the columns (102). The slider (2) includes a slide plate (201) and a protrusion (202) fixed to the bottom of the slide plate (201). A clamping block (203) is fixedly connected to the bottom of the protrusion (202). The slider (2) is provided with a moving component (4). The moving component (4) includes a motor (401) fixedly connected to the upper mold (3), a gear (402) connected to the shaft of the motor (401), a tooth condition (403) meshing with the gear (402) and slidingly connected to the upper mold (3), and a fixing claw (404) fixed to the tail of the tooth condition (403). The fixing claw (404) has a notch (405) at the bottom. The upper module (3) is detachably connected to the slider (2) via the movable component (4); When the notch (405) is moved by the motor (401) to be in close contact with the clamped block (203), the upper mold (3) and the slider (2) are fixedly connected; When the notch (405) separates from the clamped block (203), the upper mold (3) can be quickly disassembled and replaced; The bottom beam (101) is equipped with a lower mold (8) on top, a cleaning component (6) is slidably connected to the outside of the lower mold (8), and an elastic component (7) is movably connected to the bottom of the cleaning component (6). The upper mold (3) extrudes the magnesium alloy model to be processed inside the lower mold body (801). The upper mold (3) includes a support plate (301), and a plurality of pressure rods (306) are fixedly connected to the bottom of the support plate (301). When the pressure rods (306) descend with the upper mold (3), they press the cleaning part (6) down and clean the lower mold (8). When the upper mold (3) rises, the elastic component (7) drives the cleaning component (6) to reset and clean again.

2. The extrusion apparatus for high-strength magnesium alloy according to claim 1, characterized in that: The outer cylinder body of the main cylinder (104) is fixedly connected to the upper beam (103), the upper mold (3) is located below the moving component (4), the slide plate (201) is slidably connected to the four columns (102), the protrusion (202) is within the cross-sectional area of ​​the clamped block (203), the top of the bottom beam (101) is provided with a circumferential array of guide holes (105), the bottom of the upper mold (3) is equipped with a buffer (5), and the elastic component (7) is installed inside the guide hole (105).

3. The extrusion apparatus for high-strength magnesium alloy according to claim 2, characterized in that: The top two sides of the support plate (301) are provided with symmetrical T-shaped grooves (302). The bottom of the support plate (301) is fixedly connected with a plurality of circumferential array of limiting rods (303). The bottom of the limiting rods (303) is fixedly connected with a mounting column (304). One side of the mounting column (304) is provided with a mounting hole (305). The pressure rod (306) is directly opposite to the cleaning component (6). The bottom center of the support plate (301) is fixedly connected with a pressure block (307).

4. The extrusion apparatus for high-strength magnesium alloy according to claim 3, characterized in that: The tooth condition (403) includes a toothed part (4031), and a T-shaped block (4032) is fixedly connected to the top of the toothed part (4031). The T-shaped block (4032) is slidably connected to the T-shaped groove (302).

5. The extrusion apparatus for high-strength magnesium alloy according to claim 3, characterized in that: The buffer component (5) includes a buffer spring (501), one end of which is fixedly connected to the bottom of the bearing plate (301). The buffer spring (501) is sleeved on the outside of the limiting rod (303), and the cylinder body of the first oil cylinder (502) is fixedly connected inside the mounting hole (305).

6. The extrusion apparatus for high-strength magnesium alloy according to claim 3, characterized in that: The cleaning component (6) includes a liquid storage frame (601), the shape of which is the same as that of the lower mold (8). The inner side of the liquid storage frame (601) is provided with multiple arrayed bristles (602). The inside of the bristles (602) is provided with a liquid outlet (603). The liquid outlet (603) connects the liquid storage frame (601) and the bristles (602). The top of the liquid outlet (603) is provided with an injection port (604). The position of the injection port (604) is offset from that of the pressure rod (306) to facilitate the pressure rod (306) to squeeze the liquid storage frame (601).

7. The extrusion apparatus for high-strength magnesium alloy according to claim 2, characterized in that: The elastic component (7) includes a pressure-receiving part (701), and a guide part (702) is fixedly connected to the bottom of the pressure-receiving part (701). The guide part (702) is slidably connected to the guide hole (105), and a rebound spring (703) is provided between the bottom of the guide part (702) and the guide hole (105).

8. The extrusion apparatus for high-strength magnesium alloy according to claim 3, characterized in that: The lower mold body (801) has a forming hole (802) at the top. The forming hole (802) is opposite to the pressure block (307) and has the same size. The lower mold body (801) has a limiting hole (803) at the four corners of the top. The limiting hole (803) is opposite to the limiting rod (303) and has the same diameter.

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