A device and method for testing the performance of a duplex stainless steel 3D printed part

Abstract

The application is suitable for the technical field of 3D printing performance testing, and provides a duplex stainless steel 3D printing performance testing device and testing method. The device comprises a base and a box body fixedly installed on the base; a partition plate fixedly installed in the box body, which separates the box body into a density testing cavity and a mechanical testing cavity; a density testing mechanism arranged in the density testing cavity and used for duplex stainless steel 3D printing density testing; and a mechanical property testing mechanism arranged in the mechanical testing cavity and used for duplex stainless steel 3D printing mechanical property testing. The duplex stainless steel 3D printing performance testing device and testing method provided by the scheme can effectively reduce the use cost of duplex stainless steel 3D printing performance testing through multifunctional integration and efficient and convenient design, and can also improve the testing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of 3D printed parts performance testing technology, and particularly relates to a performance testing device and method for duplex stainless steel 3D printed parts. Background Technology

[0002] Duplex stainless steel is a special type of stainless steel. Its yield strength can reach 400-550MPa, which is twice that of ordinary stainless steel. Therefore, it can save materials and reduce equipment manufacturing costs. Duplex stainless steel 3D printed parts are an advanced manufacturing product that has gradually emerged in recent years with the development of additive manufacturing technology. After production, duplex stainless steel 3D printed parts need to be subjected to performance testing.

[0003] Currently, most existing performance testing devices can only perform single performance tests (such as mechanical properties, corrosion resistance, density, etc.), which leads to the need to equip multiple devices to perform performance tests on duplex stainless steel 3D printed parts, resulting in high usage costs. Summary of the Invention

[0004] This invention provides a performance testing device and method for duplex stainless steel 3D printed parts, aiming to solve the problem that the performance testing devices currently in use have relatively limited functions, as mentioned in the background art.

[0005] To address the aforementioned problems, the present invention provides a performance testing device for duplex stainless steel 3D printed parts, comprising: a base and a housing fixedly mounted on the base; a partition fixedly mounted within the housing, the partition separating the housing into a density testing chamber and a mechanical testing chamber; a density testing mechanism disposed within the density testing chamber for density testing of the duplex stainless steel 3D printed parts; and a mechanical property testing mechanism disposed within the mechanical testing chamber for mechanical property testing of the duplex stainless steel 3D printed parts.

[0006] Preferably, the density testing mechanism includes: a set of weighing devices fixedly installed inside the density testing chamber; a density measuring box and a collection box fixedly installed on the set of weighing devices, the tops of the density measuring box and the collection box being open, and the top of the density measuring box being provided with a rectangular frame; a water collection hopper fixedly sleeved on the density measuring box; and a drain pipe installed on one side of the water collection hopper, the drain pipe being inclined and extending above the collection box.

[0007] Preferably, the box body has inlets on both sides, and U-shaped plates are fixed on both sides of the box body. A set of U-shaped plates is located on one side of a set of inlets. A one-way screw is rotatably installed on a set of U-shaped plates. The one-way screw passes through the box body through a set of inlets. A slider is threaded on the one-way screw. An electric winch is installed at the bottom of the slider. An electric magnet for conveying duplex stainless steel 3D printed parts is installed on the cable of the electric winch. A first motor is fixedly installed on one side of any of the U-shaped plates. The output shaft of the first motor is fixedly connected to the one-way screw.

[0008] Preferably, the mechanical performance testing mechanism includes: a bidirectional screw rotatably mounted inside the mechanical testing chamber; a set of mounting blocks threaded onto the bidirectional screw; connecting plates respectively mounted on the set of mounting blocks, with a tension sensor mounted on any of the connecting plates; a set of placement frames respectively fixedly mounted on the tension sensor and another connecting plate; a second motor fixedly mounted on one side of the housing, the output shaft of the second motor being fixedly connected to the bidirectional screw; and clamping mechanisms respectively disposed on the set of placement frames for fixing duplex stainless steel 3D printed parts.

[0009] Preferably, the clamping mechanism includes: a hydraulic cylinder installed at the bottom of the placement frame, the output rod of the hydraulic cylinder extending into the placement frame; a pressure plate fixedly installed on the output rod of the hydraulic cylinder; and anti-slip pads respectively installed on the pressure plate and the top of the inner wall of the placement frame.

[0010] Preferably, a support rod is fixedly installed at the bottom of the mechanical testing chamber, a connecting cylinder is sleeved on the top of the support rod, a buffer spring is fixedly installed on the top of the inner wall of the connecting cylinder, the bottom end of the buffer spring is fixedly connected to the top end of the support rod, and a placement plate is fixedly installed on the top end of the connecting cylinder, the placement plate being located between a group of placement racks.

[0011] Preferably, guide plates are fixedly installed inside the box and on the U-shaped plate, and multiple guide plates slide in contact with the slider and the mounting block respectively, and the bottom of the inner wall of the water collection hopper is inclined.

[0012] Preferably, a cover plate is hinged to one side of the feed inlet, the cover plate is located on one side of the mechanical testing chamber, and a locking block is rotatably installed on one side of the housing, the locking block being in rotatable contact with the cover plate.

[0013] Preferably, a protective cover is provided on one side of the housing, the protective cover is placed on the second motor, a connecting block is fixedly installed on one side of the protective cover, a set of fixing blocks is fixedly installed on one side of the housing, the connecting block is located between the set of fixing blocks, a ring magnet is installed on the connecting block at the top, a connecting rope is installed on one side of the housing, a metal rod is installed at the bottom end of the connecting rope, the metal rod slides through the connecting block and the set of fixing blocks, and is attracted to the ring magnet.

[0014] On the other hand, a testing method for a performance testing device for duplex stainless steel 3D printed parts is also provided, comprising the following steps:

[0015] Step 1: First, use an external weighing device to measure the mass of the duplex stainless steel 3D printed part in air. After weighing, activate the electromagnet to energize it. Then, place the duplex stainless steel 3D printed part below the electromagnet, causing it to attract the part. Next, drive the slider with a one-way screw to transport the test piece into the chamber, positioning it above the density measuring chamber. Since the density measuring chamber is pre-filled with liquid, once the test piece is above the chamber, activate the electric winch to release the cable, completely immersing the test piece in the density measuring chamber. In the liquid, the electromagnet is then turned off, causing it to lose its magnetism and allowing the test specimen to be discharged into the density measuring chamber. Simultaneously, the liquid level in the density measuring chamber changes. Once the test specimen stabilizes, the rectangular frame is slid upwards, moving it away from the density measuring chamber. Excess water in the density measuring chamber is then drained into a collection tank through the density measuring chamber, water collection hopper, and drain pipe. After the liquid in the density measuring chamber stabilizes, its mass in water is measured again using a weighing device. Based on Archimedes' principle of displacement, the density and compactness of the test specimen are calculated. After testing the density of the test specimen, it is slid upwards away from the chamber.

[0016] Step 2: After testing the density of the test piece, start the first motor, so that the output shaft of the first motor drives the one-way screw to rotate, so that the one-way screw drives the slider to slide, so that the slider drives the electric magnet and the test piece to move synchronously, so that the test piece is moved horizontally above the placement plate. Then, the electric winch releases the cable, so that the test piece is placed on the placement plate. Then, the electric magnet is turned off and the electric winch winds up the cable, so that the electric magnet slides up away from the test piece.

[0017] Step 3: After the test piece is placed on the placement plate, start the second motor so that the output shaft of the second motor drives the bidirectional screw to rotate, thereby causing the bidirectional screw to drive a set of mounting blocks to slide, causing a set of placement frames to slide closer to each other, and then the set of placement frames to slide into contact with the test piece. Then turn off the second motor and start the clamping mechanism so that the pressure plate fixes the test piece on the placement frame. At the same time, the anti-slip pad is used to prevent slipping. Then start the second motor so that the output shaft of the second motor drives the bidirectional screw to rotate, causing a set of mounting blocks to slide away from each other. During the movement, the tension sensor measures and records the tension or pressure value of the test piece in real time.

[0018] Step 4: After the test is completed, rotate the clamp and open the cover to expose the feed port. Then, use the one-way screw and the electric magnet to move the test piece out of the box to complete the density and mechanical performance test of the test piece.

[0019] Preferably, a sealing ring is installed at the bottom of the rectangular frame, and the sealing ring is in close contact with the top of the density measuring box. A set of rotating rods rotates inside the density testing chamber, and gears are fixedly sleeved on each of the set of rotating rods. A set of racks is fixedly installed on one side of the rectangular frame, and the set of racks meshes with the set of gears. Each set of racks has a guide opening. A set of guide blocks is fixedly installed inside the box, and the set of guide blocks is slidably connected to the set of guide openings.

[0020] Preferably, a driven sprocket is fixedly fitted at one end of each rotating rod, a first chain is fitted on a set of driven sprockets, the first chain meshes with the set of driven sprockets, a differential sprocket is fixedly fitted on any of the rotating rods and the one-way screw, a second chain is fitted on a set of differential sprockets, the second chain meshes with the set of differential sprockets, and the first chain, the second chain, the set of driven sprockets and the set of differential sprockets are all located inside the protective cover.

[0021] Compared with related technologies, the performance testing device and method for duplex stainless steel 3D printed parts provided by this invention have the following advantages:

[0022] Compared with existing technologies, the performance testing device and method for duplex stainless steel 3D printed parts provided in this solution integrates two major functions, density testing and mechanical property testing, through the enclosure, realizing a comprehensive evaluation of the performance of duplex stainless steel 3D printed parts, reducing the frequency and cost of equipment replacement during the testing process, and making the testing operation simpler and faster through reasonable spatial layout and structural design, thus improving testing efficiency.

[0023] In summary, this invention provides a performance testing device and method for duplex stainless steel 3D printed parts. Through multifunctional integration and efficient and convenient design, it can effectively reduce the cost of using duplex stainless steel 3D printed parts performance testing, while also improving testing efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the front cross-sectional structure of a performance testing device for duplex stainless steel 3D printed parts provided by the present invention;

[0025] Figure 2 This is a side cross-sectional view of a performance testing device for duplex stainless steel 3D printed parts provided by the present invention.

[0026] Figure 3 This is a rear cross-sectional view of a performance testing device for duplex stainless steel 3D printed parts provided by the present invention.

[0027] Figure 4 This is a side view of a performance testing device for duplex stainless steel 3D printed parts provided by the present invention.

[0028] Figure 5 This is a three-dimensional exploded view of the fixing block and metal rod provided by the present invention;

[0029] Figure 6 This is a three-dimensional structural diagram of the U-shaped plate and guide plate provided by the present invention;

[0030] Figure 7 This is an assembly drawing of a set of differential sprockets and a second sprocket provided by the present invention;

[0031] Figure 8 for Figure 1 An enlarged structural diagram of part A shown in the figure;

[0032] Figure 9 for Figure 2 An enlarged structural diagram of part B shown in the figure;

[0033] Figure 10 for Figure 1 An enlarged structural diagram of section C shown in the figure;

[0034] Figure 11 for Figure 3 The diagram shows an enlarged view of part D.

[0035] Reference numerals: 1. Base; 2. Box body; 3. Partition; 4. Weighing equipment; 5. Density measuring box; 6. Collection box; 7. Water collection hopper; 8. Drain pipe; 9. U-shaped plate; 10. One-way screw; 11. Slider; 12. Electric winch; 13. Electric magnet; 14. First motor; 15. Two-way screw; 16. Mounting block; 17. Connecting plate; 18. Tension sensor; 19. Placement rack; 20. Second motor; 21. 21. Hydraulic cylinder; 22. Pressure plate; 23. Support rod; 24. Connecting cylinder; 25. Buffer spring; 26. Placement plate; 27. Guide plate; 28. Cover plate; 29. ​​Protective box; 30. Connecting block; 31. Fixing block; 32. Ring magnet; 33. Metal rod; 34. Rectangular frame; 35. Rotating rod; 36. Gear; 37. Rack; 38. Driven sprocket; 39. First chain; 40. Differential sprocket; 41. Second chain. Detailed Implementation

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and 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 the invention.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] This invention provides a performance testing device for duplex stainless steel 3D printed parts, such as... Figure 1-11As shown, the performance testing device for duplex stainless steel 3D printed parts includes: a base 1 and a housing 2 fixedly installed on the base 1; a partition 3 fixedly installed inside the housing 2, the partition 3 separating the housing 2 to form a density testing chamber and a mechanical testing chamber; a density testing mechanism disposed in the density testing chamber for density testing of duplex stainless steel 3D printed parts; and a mechanical performance testing mechanism disposed in the mechanical testing chamber for mechanical performance testing of duplex stainless steel 3D printed parts.

[0039] In this embodiment, when performance testing of the test piece is required, the unidirectional screw 10 and the electric magnet 13 are used together to move the test piece into the housing 2. Then, the test piece is moved above the density testing mechanism. The density testing mechanism and the electric winch 12 are manipulated to perform a density test on the test piece. After the test, the test piece is moved to the mechanical performance testing mechanism to perform a test. After the test, the test piece is moved out of the housing 2, completing the performance testing of the test piece. The housing 2 integrates both density testing and mechanical performance testing functions, enabling a comprehensive evaluation of the performance of duplex stainless steel 3D printed parts. This reduces the frequency and cost of equipment replacement during testing. At the same time, the reasonable spatial layout and structural design make the testing operation simpler and faster, improving testing efficiency.

[0040] In a further preferred embodiment of the present invention, the density testing mechanism includes: a set of weighing devices 4, all fixedly installed inside the density testing chamber; a density measuring box 5 and a collection box 6, respectively fixedly installed on the set of weighing devices 4, the tops of the density measuring box 5 and the collection box 6 being open, and a rectangular frame 34 being provided on the top of the density measuring box 5; a water collecting hopper 7 fixedly sleeved on the density measuring box 5; and a drain pipe 8 installed on one side of the water collecting hopper 7, the drain pipe 8 being inclined and extending above the collection box 6.

[0041] In this embodiment, the mass (dry weight) of the duplex stainless steel 3D printed part in air is first measured using an external weighing device. After weighing, the electromagnet 13 is activated to energize it. The duplex stainless steel 3D printed part is then placed below the electromagnet 13, causing it to attract the part. The unidirectional screw 10 then drives the slider 11 to slide, transporting the test piece into the housing 2, positioning it above the density measuring chamber 5. Since the density measuring chamber 5 is pre-filled with liquid (usually water), once the test piece is above it, the electric winch 12 is activated to release the cable, completely immersing the test piece in the liquid within the density measuring chamber 5. The electromagnet 13 is then deactivated, causing it to lose its magnetism. The test specimen is placed into the density measuring chamber 5, and the liquid level in the chamber changes simultaneously. After the test specimen stabilizes, the rectangular frame 34 is slid upwards, moving it away from the density measuring chamber 5. Excess water in the density measuring chamber 5 is then drained into the collection tank 6 through the chamber 5, the water collection hopper 7, and the drain pipe 8. After the liquid in the density measuring chamber 5 stabilizes, the mass (wet weight) in water is measured again using the weighing device 4. Based on Archimedes' principle of displacement, the density and compactness of the test specimen are calculated. After the density of the test specimen is tested, it is slid upwards away from the chamber 2. The rectangular frame 34 and the water collection hopper 7 effectively guide the water overflowing from the density measuring chamber 5, ensuring that it does not fall out of the water collection hopper 7, which is beneficial for subsequent weighing of the water in the collection tank 6.

[0042] In a further preferred embodiment of the present invention, feed inlets are provided on both sides of the housing 2, and U-shaped plates 9 are fixed on both sides of the housing 2. A set of U-shaped plates 9 are located on one side of a set of feed inlets. A one-way screw 10 is rotatably mounted on a set of U-shaped plates 9. The one-way screw 10 passes through the housing 2 through a set of feed inlets. A slider 11 is threaded onto the one-way screw 10. An electric winch 12 is installed at the bottom of the slider 11. An electric magnet 13 for conveying duplex stainless steel 3D printed parts is installed on the cable of the electric winch 12. A first motor 14 is fixedly mounted on one side of any of the U-shaped plates 9. The output shaft of the first motor 14 is fixedly connected to the one-way screw 10.

[0043] In this embodiment, after testing the density of the test piece, the first motor 14 is started, causing the output shaft of the first motor 14 to drive the one-way screw 10 to rotate. The one-way screw 10 drives the slider 11 to slide, causing the slider 11 to move the electric magnet 13 and the test piece synchronously. The test piece is then moved horizontally above the placement plate 26. After that, the electric winch 12 releases the cable, thereby placing the test piece on the placement plate 26. Then, the electric magnet 13 is turned off while the electric winch 12 winds up the cable, causing the electric magnet 13 to slide upward away from the test piece. Through the drive of the first motor 14 and the attraction of the electric magnet 13, the automated transport of duplex stainless steel 3D printed parts is realized, improving testing efficiency. At the same time, the design of the electric magnet 13 makes the transport system applicable to duplex stainless steel 3D printed parts of different sizes and shapes, enhancing the versatility and flexibility of the device.

[0044] In a further preferred embodiment of the present invention, the mechanical performance testing mechanism includes: a bidirectional screw 15 rotatably mounted in the mechanical testing chamber; a set of mounting blocks 16 threaded onto the bidirectional screw 15; connecting plates 17 respectively mounted on the set of mounting blocks 16, with a tension sensor 18 mounted on any of the connecting plates 17; a set of placement racks 19 respectively fixedly mounted on the tension sensor 18 and another connecting plate 17; a second motor 20 fixedly mounted on one side of the housing 2, with the output shaft of the second motor 20 fixedly connected to the bidirectional screw 15; and clamping mechanisms respectively provided on the set of placement racks 19 for fixing duplex stainless steel 3D printed parts.

[0045] In this embodiment, after the test piece is placed on the placement plate 26, the second motor 20 is started, causing the output shaft of the second motor 20 to drive the bidirectional screw 15 to rotate. This causes the bidirectional screw 15 to drive a set of mounting blocks 16 to slide, causing a set of placement frames 19 to slide closer to each other and then slide into contact with the test piece. After that, the second motor 20 is turned off, and then the clamping mechanism is started, causing the pressure plate 22 to fix the test piece on the placement frame 19. At the same time, the anti-slip pad is used to prevent slippage. Then, the second motor 20 is started again, causing the output shaft of the second motor 20 to drive the bidirectional screw 15 to rotate, causing the set of mounting blocks 16 to slide further away from each other. During the movement, the tension sensor 18 measures and records the tension or pressure value of the test piece in real time. By accurately measuring the force value change during the test process through the tension sensor 18, reliable data is provided for the mechanical performance evaluation of the duplex stainless steel 3D printed parts. At the same time, the second motor 20 drives the bidirectional screw 15 to realize the automated testing process, reducing the complexity and error of manual operation.

[0046] In a further preferred embodiment of the present invention, the clamping mechanism includes: a hydraulic cylinder 21 installed at the bottom of the placement frame 19, the output rod of the hydraulic cylinder 21 extending into the placement frame 19; a pressure plate 22 fixedly installed on the output rod of the hydraulic cylinder 21; and anti-slip pads respectively installed on the pressure plate 22 and the top of the inner wall of the placement frame 19.

[0047] In this embodiment, the hydraulic cylinder 21 and the pressure plate 22 work together to achieve stable fixation of the duplex stainless steel 3D printed part, ensuring positional stability during the test. The anti-slip pad increases the friction between the part and the printed part, effectively preventing slippage or detachment during the test.

[0048] In a further preferred embodiment of the present invention, a support rod 23 is fixedly installed at the bottom of the mechanical testing chamber, a connecting cylinder 24 is sleeved on the top of the support rod 23, a buffer spring 25 is fixedly installed on the top of the inner wall of the connecting cylinder 24, the bottom end of the buffer spring 25 is fixedly connected to the top end of the support rod 23, and a placement plate 26 is fixedly installed on the top end of the connecting cylinder 24, the placement plate 26 being located between a group of placement racks 19.

[0049] In this embodiment, the combination design of support rod 23, connecting cylinder 24 and buffer spring 25 provides stable support and buffering for placement plate 26, improving stability during the test process.

[0050] In a further preferred embodiment of the present invention, guide plates 27 are fixedly installed inside the box 2 and on the U-shaped plate 9, and multiple guide plates 27 slide in contact with the slider 11 and the mounting block 16 respectively, and the bottom of the inner wall of the water collecting hopper 7 is inclined.

[0051] In this embodiment, the inclined bottom of the inner wall of the water collection hopper 7 facilitates the natural convergence and discharge of water, reducing the occurrence of water accumulation. This facilitates the discharge of water from the water collection hopper 7 into the collection box 6, thereby improving the water collection efficiency. The guide plate 27 provides a sliding path for the slider 11 and the mounting block 16, ensuring their stability and accuracy during movement, which helps to reduce mechanical wear and failures caused by poor sliding or deviation.

[0052] In a further preferred embodiment of the present invention, a cover plate 28 is hinged to one side of the feed inlet, the cover plate 28 is located on one side of the mechanical testing chamber, and a locking block is rotatably installed on one side of the housing 2, the locking block being in rotatable contact with the cover plate 28.

[0053] In this embodiment, when the chamber 2 is performing performance testing on the test piece, the cover plate 28 closes the feed inlet to prevent dust, debris or other unexpected substances from entering the mechanical testing chamber, thereby protecting the cleanliness of the testing environment and the normal operation of the equipment. It also prevents the test piece from being thrown out of the chamber 2. The locking block provides an additional locking function for the cover plate 28, preventing the cover plate 28 from loosening or opening due to accidental contact or vibration, thereby improving the safety performance of the equipment.

[0054] In a further preferred embodiment of the present invention, a protective cover 29 is provided on one side of the housing 2, the protective cover 29 covers the second motor 20, a connecting block 30 is fixedly installed on one side of the protective cover 29, a set of fixing blocks 31 is fixedly installed on one side of the housing 2, the connecting block 30 is located between the set of fixing blocks 31, an annular magnet 32 ​​is installed on the connecting block 30 at the top, a connecting rope is installed on one side of the housing 2, a metal rod 33 is installed at the bottom end of the connecting rope, the metal rod 33 slides through the connecting block 30 and the set of fixing blocks 31, and is attracted to the annular magnet 32.

[0055] In this embodiment, the user only needs to align the connecting block 30 on the protective cover 29 with the position of the fixing block 31 on the housing 2, push the connecting block 30 into the space between the fixing blocks 31, and then insert the metal rod 33 into the fixing block 31 and attach it to the annular magnet 32 ​​to complete the quick installation of the protective cover 29. When disassembling, simply pull the connecting rope gently to detach the metal rod 33 from the annular magnet 32, and the protective cover 29 can be easily removed. The attraction between the annular magnet 32 ​​and the metal rod 33 ensures the stability of the protective cover 29 in the installed state, avoiding loosening or falling off due to vibration or external force.

[0056] This invention also provides a testing method for a performance testing device for duplex stainless steel 3D printed parts, comprising the following steps:

[0057] Step 1: First, use an external weighing device to measure the mass (dry weight) of the duplex stainless steel 3D printed part in air. After weighing, activate the electric magnet 13 to energize it. Then, place the duplex stainless steel 3D printed part below the electric magnet 13, causing the magnet to attract the part. Next, drive the slider 11 with the one-way screw 10 to slide, transporting the test piece into the chamber 2, positioning it above the density measuring chamber 5. Since the density measuring chamber 5 is pre-filled with liquid (usually water), once the test piece is above the chamber, activate the electric winch 12 to release the cable, completely immersing the test piece in the density measuring chamber. The test piece is placed in the liquid in the measuring chamber 5. Then, the electric magnet 13 is turned off, causing the electric magnet 13 to lose its magnetism, thereby discharging the test piece into the density measuring chamber 5. At the same time, the liquid level in the density measuring chamber 5 changes. After the test piece stabilizes, the rectangular frame 34 is slid upwards, thereby moving it away from the density measuring chamber 5. Then, the excess water in the density measuring chamber 5 is discharged into the collection tank 6 through the density measuring chamber 5, the water collection hopper 7, and the drain pipe 8. After the liquid in the density measuring chamber 5 stabilizes, the mass (wet weight) in water is measured again using the weighing device 4. According to the Archimedes displacement method, the density and compactness of the test piece are calculated. After the density of the test piece is tested, the test piece is slid upwards away from the chamber 2.

[0058] Step 2: After testing the density of the test piece, start the first motor 14, so that the output shaft of the first motor 14 drives the one-way screw 10 to rotate, so that the one-way screw 10 drives the slider 11 to slide, so that the slider 11 drives the electric magnet 13 and the test piece to move synchronously, so that the test piece is moved horizontally above the placement plate 26. Then, the electric winch 12 releases the cable, so that the test piece is placed on the placement plate 26. Then, the electric magnet 13 is turned off and the electric winch 12 is wound up the cable, so that the electric magnet 13 slides up away from the test piece.

[0059] Step 3: After the test piece is placed on the placement plate 26, the second motor 20 is started, and the output shaft of the second motor 20 drives the bidirectional screw 15 to rotate, thereby causing the bidirectional screw 15 to drive a set of mounting blocks 16 to slide, causing a set of placement racks 19 to slide closer to each other, and then the set of placement racks 19 to slide into contact with the test piece. Then the second motor 20 is turned off, and then the clamping mechanism is started, so that the pressure plate 22 fixes the test piece on the placement rack 19, and at the same time the anti-slip pad is used to prevent slipping. Then the second motor 20 is started, and the output shaft of the second motor 20 drives the bidirectional screw 15 to rotate, causing a set of mounting blocks 16 to slide away from each other. During the movement, the tension sensor 18 measures and records the tension or pressure value of the test piece in real time.

[0060] Step 4: After the test is completed, rotate the clamp and open the cover plate 28 to expose the feed port. Then, use the one-way screw 10 and the electric magnet 13 to move the test piece out of the box 2 to complete the density and mechanical performance test of the test piece.

[0061] To further improve the performance of this device, in addition to the above-mentioned solutions, this solution also includes the following embodiments:

[0062] In another embodiment of the present invention, a sealing ring is installed at the bottom of the rectangular frame 34, and the sealing ring is in close contact with the top of the density measuring box 5. A set of rotating rods 35 rotates inside the density testing chamber, and gears 36 are fixedly sleeved on each of the set of rotating rods 35. A set of racks 37 is fixedly installed on one side of the rectangular frame 34, and the set of racks 37 meshes with the set of gears 36 respectively. A guide opening is provided on each of the set of racks 37. A set of guide blocks is fixedly installed inside the box 2, and the set of guide blocks is slidably connected to the set of guide openings respectively.

[0063] In this embodiment, after the test specimen is placed into the density measuring chamber 5, the liquid level in the density measuring chamber 5 is higher than that in the density measuring chamber 5. At this time, the liquid level is located in the rectangular frame 34. After the test specimen is stable in the density measuring chamber 5, the rotating rod 35 is rotated, which drives the gear 36 to rotate synchronously, thereby driving the rack 37 to slide. The rack 37 drives the rectangular frame 34 to slide synchronously upward, so that the rectangular frame 34 slides upward away from the density measuring chamber 5. Then, the water overflowing from the density measuring chamber 5 is discharged into the water collection hopper 7 through the gap exposed when the rectangular frame 34 slides upward, and then discharged into the collection tank 6 through the drain pipe 8. The sealing ring ensures the sealing of the density measuring chamber 5 and the rectangular frame 34 during the test process, preventing fluid overflow. The cooperation between the guide port and the guide block effectively provides stability and directionality for the movement of the rack 37.

[0064] In another embodiment of the present invention, a driven sprocket 38 is fixedly sleeved on one end of each of the set of rotating rods 35, and a first chain 39 is sleeved on the set of driven sprockets 38. The first chain 39 meshes with the set of driven sprockets 38. A differential sprocket 40 is fixedly sleeved on each of the rotating rods 35 and the one-way screw 10. A second chain 41 is sleeved on the set of differential sprockets 40. The second chain 41 meshes with the set of differential sprockets 40. The first chain 39, the second chain 41, the set of driven sprockets 38 and the set of differential sprockets 40 are all located inside the protective cover 29.

[0065] In this embodiment, when moving the rectangular frame 34, the second motor 20 is first started, causing the output shaft of the second motor 20 to drive the bidirectional screw 15 to rotate, which in turn drives the differential sprocket 40 to rotate. This rotation is transmitted to a set of rotating rods 35 through the second chain 41, the driven sprocket 38, and the second chain 41, causing the set of rotating rods 35 to rotate synchronously and slide the rectangular frame 34 up and down. At the same time, the bidirectional screw 15 drives a set of placement racks 19 to slide closer to each other. After the excess water in the density measuring box 5 is discharged, the second motor 20 drives the bidirectional screw 15 to rotate in the opposite direction, resetting the set of placement racks 19 and the rectangular frame 34.

[0066] In summary, compared with related technologies, this device, through its multi-functional integration and efficient and convenient design, can effectively reduce the cost of performance testing of duplex stainless steel 3D printed parts, while also improving testing efficiency.

[0067] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A performance testing device for duplex stainless steel 3D printed parts, characterized in that, include: A base (1) and a housing (2) fixedly mounted on the base (1); A partition (3) is fixedly installed inside the box (2), the partition (3) separating the inside of the box (2) to form a density testing chamber and a mechanical testing chamber; A density testing mechanism for density testing of duplex stainless steel 3D printed parts, located inside the density testing chamber. A mechanical property testing mechanism for duplex stainless steel 3D printed parts, located inside the mechanical testing chamber; The density testing apparatus includes: A set of weighing devices (4) are fixedly installed inside the density testing chamber. Density measuring box (5) and collection box (6) are respectively fixedly installed on a set of weighing equipment (4). The top of the density measuring box (5) and collection box (6) are both open. The top of the density measuring box (5) is provided with a rectangular frame (34). A water collection hopper (7) is fixedly mounted on the density measuring box (5); A drain pipe (8) is installed on one side of the water collection hopper (7), the drain pipe (8) is set at an angle and extends to the top of the collection box (6); The box (2) has inlets on both sides and U-shaped plates (9) are fixed on both sides. A set of U-shaped plates (9) are located on one side of a set of inlets. A one-way screw (10) is rotatably installed on a set of U-shaped plates (9). The one-way screw (10) passes through the box (2) through a set of inlets. A slider (11) is threaded on the one-way screw (10). An electric winch (12) is installed at the bottom of the slider (11). An electric magnet (13) for conveying duplex stainless steel 3D printed parts is installed on the cable of the electric winch (12). A first motor (14) is fixedly installed on one side of any U-shaped plate (9). The output shaft of the first motor (14) is fixedly connected to the one-way screw (10). The mechanical performance testing mechanism includes: Rotate the bidirectional screw (15) installed in the mechanical testing chamber. A set of mounting blocks (16) are threaded onto the bidirectional screw (15); A connecting plate (17) is installed on a set of mounting blocks (16), and a tension sensor (18) is installed on any of the connecting plates (17). A set of mounting brackets (19) are respectively fixedly installed on the tension sensor (18) and another connecting plate (17); A second motor (20) is fixedly installed on one side of the housing (2), and the output shaft of the second motor (20) is fixedly connected to the bidirectional screw (15); Clamping mechanisms for fixing duplex stainless steel 3D printed parts are respectively set on a set of the placement racks (19).

2. The performance testing device for duplex stainless steel 3D printed parts as described in claim 1, characterized in that, The clamping mechanism includes: A hydraulic cylinder (21) is installed at the bottom of the placement frame (19), and the output rod of the hydraulic cylinder (21) extends into the placement frame (19); A pressure plate (22) is fixedly installed on the output rod of the hydraulic cylinder (21); Anti-slip pads are installed on the top of the inner wall of the pressure plate (22) and the placement rack (19), respectively.

3. The performance testing device for duplex stainless steel 3D printed parts as described in claim 1, characterized in that, A support rod (23) is fixedly installed at the bottom of the mechanical testing chamber. A connecting cylinder (24) is sleeved on the top of the support rod (23). A buffer spring (25) is fixedly installed on the top of the inner wall of the connecting cylinder (24). The bottom end of the buffer spring (25) is fixedly connected to the top end of the support rod (23). A placement plate (26) is fixedly installed on the top end of the connecting cylinder (24). The placement plate (26) is located between a set of placement racks (19).

4. The performance testing device for duplex stainless steel 3D printed parts as described in claim 1, characterized in that, Guide plates (27) are fixedly installed inside the box (2) and on the U-shaped plate (9). Multiple guide plates (27) slide in contact with the slider (11) and the mounting block (16) respectively. The bottom of the inner wall of the water collection hopper (7) is inclined.

5. The performance testing device for duplex stainless steel 3D printed parts as described in claim 1, characterized in that, A hinged cover plate (28) is connected to one side of the feed inlet. The cover plate (28) is located on one side of the mechanical testing chamber. A locking block is rotatably installed on one side of the box body (2). The locking block is in rotatable contact with the cover plate (28).

6. The performance testing device for duplex stainless steel 3D printed parts as described in claim 1, characterized in that, A protective cover (29) is provided on one side of the housing (2), and the protective cover (29) covers the second motor (20). A connecting block (30) is fixedly installed on one side of the protective cover (29). A set of fixing blocks (31) is fixedly installed on one side of the housing (2). The connecting block (30) is located between the set of fixing blocks (31). A ring magnet (32) is installed on the connecting block (30) at the top. A connecting rope is installed on one side of the housing (2). A metal rod (33) is installed at the bottom end of the connecting rope. The metal rod (33) slides through the connecting block (30) and the set of fixing blocks (31) and is attracted to the ring magnet (32).

7. The test method of the performance testing device for duplex stainless steel 3D printed parts according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: First, use an external weighing device to measure the mass of the duplex stainless steel 3D printed part in air. After weighing, start the electric magnet (13) to energize it. Then, place the duplex stainless steel 3D printed part under the electric magnet (13) so that the electric magnet (13) attracts the duplex stainless steel 3D printed part. Then, drive the slider (11) with the one-way screw (10) to slide and transport the test piece into the box (2) so that it is above the density measuring box (5). Since the density measuring box (5) is filled with liquid in advance, after the test piece is above the density measuring box (5), start the electric winch (12) to release the cable and completely immerse the test piece in the liquid in the density measuring box (5). After the test piece is placed in the body, the electric magnet (13) is turned off, causing the electric magnet (13) to lose its magnetism, thereby discharging the test piece into the density measuring box (5). At the same time, the liquid level in the density measuring box (5) changes. After the test piece stabilizes, the rectangular frame (34) is slid up, thereby moving it away from the density measuring box (5). Then, the excess water in the density measuring box (5) is discharged into the collection box (6) through the density measuring box (5), the water collection hopper (7) and the drain pipe (8). After the liquid in the density measuring box (5) stabilizes, the weighing device (4) is used again to measure its mass in water. According to the Archimedes displacement method, the density and compactness of the test piece are calculated. After the density of the test piece is tested, the test piece is slid up away from the box (2). Step 2: After testing the density of the test piece, start the first motor (14) and make the output shaft of the first motor (14) drive the one-way screw (10) to rotate, so that the one-way screw (10) drives the slider (11) to slide, so that the slider (11) drives the electric magnet (13) and the test piece to move synchronously, so that the test piece is moved to the top of the placement plate (26). Then, the electric winch (12) releases the cable, so that the test piece is placed on the placement plate (26). Then, the electric magnet (13) is turned off and the electric winch (12) is wound up the cable, so that the electric magnet (13) slides up away from the test piece. Step 3: After the test piece is placed on the placement plate (26), start the second motor (20) so that the output shaft of the second motor (20) drives the bidirectional screw (15) to rotate, so that the bidirectional screw (15) drives a set of mounting blocks (16) to slide, so that a set of placement racks (19) slides closer to each other, so that a set of placement racks (19) slides to contact the test piece. Then turn off the second motor (20), and then start the clamping mechanism so that the pressure plate (22) fixes the test piece on the placement rack (19), and at the same time, the anti-slip pad is used to prevent it from slipping. Then start the second motor (20) so that the output shaft of the second motor (20) drives the bidirectional screw (15) to rotate, so that a set of mounting blocks (16) slides away from each other. During the movement, the tension sensor (18) measures and records the tension or pressure value of the test piece in real time. Step 4: After the test is completed, rotate the clamp and open the cover plate (28) to expose the feed port. Then, use the one-way screw (10) and the electric magnet (13) to move the test piece out of the box (2) to complete the density and mechanical performance test of the test piece.

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