Device and method for testing performance of duplex stainless steel 3D printing piece

Abstract

The invention is suitable for the technical field of 3D printing piece performance testing, and provides a duplex stainless steel 3D printing piece performance testing device and a duplex stainless steel 3D printing piece performance testing method.The device comprises a base and a box fixedly installed on the base; the partition plate is fixedly mounted in the box body and divides the interior of the box body into a density test cavity and a mechanical test cavity; the density testing mechanism is arranged in the density testing cavity and is used for testing the density of the duplex stainless steel 3D printing piece; and the mechanical property testing mechanism is arranged in the mechanical testing cavity and is used for testing the mechanical property of the duplex stainless steel 3D printing piece. According to the duplex stainless steel 3D printing piece performance testing device and method, through multifunctional integration and efficient and convenient design, the use cost of duplex stainless steel 3D printing piece performance testing can be effectively reduced, and meanwhile the testing efficiency can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of 3D printed part performance testing, and in particular relates to a duplex stainless steel 3D printed part performance testing device and a testing method. Background Art

[0002] Duplex stainless steel is a special type of stainless steel. The yield strength of duplex stainless steel 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. Duplex stainless steel 3D printed parts need to be tested for performance after production.

[0003] At present, most of the existing performance testing devices can only perform a single performance test (such as mechanical properties, corrosion resistance, density, etc.), which leads to the need to equip a variety of equipment to perform performance tests on duplex stainless steel 3D printed parts, which is costly to use. Summary of the invention

[0004] The present invention provides a duplex stainless steel 3D printed part performance testing device and testing method, aiming to solve the problem of the relatively single function of the currently used performance testing device raised in the above background technology.

[0005] To solve the above problems, the present invention is implemented as follows: a duplex stainless steel 3D printed part performance testing device comprises: a base and a box body fixedly mounted on the base; a partition fixedly mounted in the box body, the partition body separates the box body into a density testing chamber and a mechanical testing chamber; a density testing mechanism provided in the density testing chamber for density testing of duplex stainless steel 3D printed parts; and a mechanical properties testing mechanism provided in the mechanical testing chamber for mechanical properties of duplex stainless steel 3D printed parts.

[0006] Preferably, the density testing mechanism includes: a group of weighing devices fixedly installed in the density testing chamber; a density measuring box and a collecting box respectively fixedly installed on a group of the weighing devices, the tops of the density measuring box and the collecting box are both open, and a rectangular frame is provided on the top of the density measuring box; a water collecting hopper fixedly mounted on the density measuring box; a drainage pipe installed on one side of the water collecting hopper, the drainage pipe is inclined and extends to the top of the collecting box.

[0007] Preferably, feed ports are provided on both sides of the box body, U-shaped plates are fixed on both sides of the box body, a group of the U-shaped plates are respectively located on one side of a group of the feed ports, a one-way screw is rotatably installed on a group of the U-shaped plates, the one-way screw penetrates the box body through a group of feed ports, a slider is threadedly sleeved 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 one of the U-shaped plates, and the output shaft of the first motor is fixedly connected to the one-way screw.

[0008] Preferably, the mechanical property testing mechanism includes: a bidirectional screw rotatably installed in the mechanical testing cavity; a group of mounting blocks threadedly sleeved on the bidirectional screw; connecting plates respectively installed on a group of the mounting blocks, any of the connecting plates being equipped with a tension sensor; a group of placement racks respectively fixedly installed on the tension sensor and another connecting plate; a second motor fixedly installed on one side of the box body, the output shaft of the second motor being fixedly connected to the bidirectional screw; and clamping mechanisms respectively arranged on a group of the placement racks for fixing the duplex stainless steel 3D printed parts.

[0009] Preferably, the clamping mechanism includes: a hydraulic cylinder installed at the bottom of the placement rack, the output rod of the hydraulic cylinder extending into the placement rack; 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 rack.

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

[0011] Preferably, guide plates are fixedly mounted in the box body and on the U-shaped plate, a plurality of guide plates are in sliding contact with the slider and the mounting block respectively, and the bottom of the inner wall of the water collecting bucket is arranged in an inclined shape.

[0012] Preferably, a cover plate is hinged on one side of the feed port, the cover plate is located on one side of the mechanical testing chamber, and a clamping block is rotatably mounted on one side of the box body, and the clamping block is in rotational contact with the cover plate.

[0013] Preferably, a protective cover is provided on one side of the box body, and the protective cover is provided on the second motor. A connecting block is fixedly installed on one side of the protective cover, and a group of fixed blocks are fixedly installed on one side of the box body, and the connecting block is located between a group of fixed blocks. An annular magnet is installed on the connecting block located at the top, and a connecting rope is installed on one side of the box body. A metal rod is installed at the bottom end of the connecting rope, and the metal rod slides through the connecting block and a group of fixed blocks and is adsorbed on the annular magnet.

[0014] On the other hand, a testing method for a duplex stainless steel 3D printed part performance testing device 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 the air. After weighing, start the electric magnet and energize the electric magnet. Then, place the duplex stainless steel 3D printed part under the electric magnet so that the electric magnet adsorbs the duplex stainless steel 3D printed part. Then, drive the slider to slide and transport the test piece into the box so that it is located above the density measurement box. Since the density measurement box is filled with liquid in advance, when the test piece is located above the density measurement box, start the electric winch to release the cable to completely immerse the test piece in the density measurement box. The electric magnet is then turned off to make it lose its magnetism, so that the test piece is discharged into the density measurement box. At the same time, the liquid level in the density measurement box changes. After the test piece is stable, the rectangular frame is slid upward to keep it away from the density measurement box. Then, the excess water in the density measurement box is discharged into the collection box through the density measurement box, the water collecting bucket and the drainage pipe. After the liquid in the density measurement box is stable, the weighing equipment is used again to measure its mass in the water. According to the principle of Archimedes' drainage method, the density and density of the test piece are calculated. After the density of the test piece is tested, the test piece is slid upward to keep it away from the box.

[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 translated to the top of the placement plate, and then the electric winch releases the cable to place the test piece on the placement plate, and then the electric magnet is turned off and the electric winch reels the cable, so that the electric magnet slides up and away from the test piece;

[0017] Step 3: After the test piece is placed on the placement plate, the second motor is started, so that the output shaft of the second motor drives the bidirectional screw to rotate, so that the bidirectional screw drives a group of mounting blocks to slide, so that a group of placement racks slide close to each other, so that a group of placement racks slide and contact the test piece, and then the second motor is turned off, and then the holding mechanism is started, so that the pressure plate fixes the test piece on the placement rack, and the anti-skid pad performs anti-skid treatment on it, and then the second motor is started, so that the output shaft of the second motor drives the bidirectional screw to rotate, so that a group of mounting blocks 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, turn the block and open the cover to expose the feed port. Then use the one-way screw and electric magnet together 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 group of rotating rods rotate in the density testing cavity, and gears are fixedly sleeved on a group of rotating rods. A group of racks are fixedly installed on one side of the rectangular frame, and a group of racks are respectively meshed with a group of gears. A group of racks are each provided with a guide opening, and a group of guide blocks are fixedly installed in the box body, and a group of guide blocks are respectively slidably connected with a group of guide openings.

[0020] Preferably, a driven sprocket is fixedly sleeved on one end of the rotating rod, a first chain is sleeved on a group of the driven sprockets, the first chain is meshed with a group of the driven sprockets, a differential sprocket is fixedly sleeved on any of the rotating rods and the one-way screw, a second chain is sleeved on a group of the differential sprockets, the second chain is meshed with a group of the differential sprockets, and the first chain, the second chain, a group of the driven sprockets and a group of the differential sprockets are all located in a protective cover.

[0021] Compared with the related art, the duplex stainless steel 3D printed part performance testing device and testing method provided by the present invention have the following beneficial effects:

[0022] Compared with the prior art, the duplex stainless steel 3D printed parts performance testing device and testing method provided by this scheme integrates the two major functions of density testing and mechanical properties testing through a box, realizes a comprehensive evaluation of the performance of duplex stainless steel 3D printed parts, reduces the frequency and cost of equipment replacement during the test, and at the same time, through reasonable space layout and structural design, makes the test operation simpler and faster, and improves the test efficiency.

[0023] In summary, the present invention provides a duplex stainless steel 3D printed part performance testing device and testing method, which can effectively reduce the use cost of duplex stainless steel 3D printed part performance testing through multi-functional integration and efficient and convenient design, and can also improve the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 It is a schematic diagram of a side cross-sectional structure of a duplex stainless steel 3D printed part performance testing device provided by the present invention;

[0026] Figure 3 It is a rear cross-sectional structural schematic diagram of a duplex stainless steel 3D printed part performance testing device provided by the present invention;

[0027] Figure 4 It is a side view structural schematic diagram of a duplex stainless steel 3D printed part performance testing device provided by the present invention;

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

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

[0030] Figure 7 It is an assembly diagram 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 FIG.

[0032] Fig. 9 for Figure 2 An enlarged schematic diagram of the structure of part B shown in FIG.

[0033] Fig.10 for Figure 1 An enlarged schematic diagram of the structure of part C shown in FIG.

[0034] Fig.11 for Figure 3 Schematic diagram of the enlarged structure of part D shown in FIG.

[0035] Figure numerals: 1, base; 2, box; 3, partition; 4, weighing device; 5, density measurement box; 6, collection box; 7, water collecting bucket; 8, drainage 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, Hydraulic cylinder; 22, pressure plate; 23, support rod; 24, connecting tube; 25, buffer spring; 26, placement plate; 27, guide plate; 28, cover plate; 29, protective box; 30, connecting block; 31, fixing block; 32, annular 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 DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned figures are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] The embodiment of the present invention provides a duplex stainless steel 3D printed part performance testing device, such as Figure 1-11As shown, the duplex stainless steel 3D printed part performance testing device comprises: a base 1 and a box body 2 fixedly mounted on the base 1; a partition 3 fixedly mounted in the box body 2, the partition 3 separates the box body 2 into a density testing chamber and a mechanical testing chamber; a density testing mechanism disposed in the density testing chamber for density testing of the duplex stainless steel 3D printed part; and a mechanical properties testing mechanism disposed in the mechanical testing chamber for mechanical properties of the duplex stainless steel 3D printed part.

[0039] In this embodiment, when it is necessary to perform performance testing on the test piece, the one-way screw 10 and the electric magnet 13 are first used in combination to move the test piece into the box 2, and then move it to the top of the density testing mechanism, and perform a density test on the test piece by manipulating the density detection mechanism and the electric winch 12. After the test, the test piece is moved to the mechanical property testing mechanism, and the mechanical property testing mechanism performs a test on the test piece. After the test, it is moved out of the box 2 to complete the performance test of the test piece. The box 2 integrates the two major functions of density testing and mechanical property testing, thereby realizing a comprehensive evaluation of the performance of duplex stainless steel 3D printed parts, reducing the frequency and cost of equipment replacement during the test, and at the same time, through reasonable spatial layout and structural design, the test operation is made simpler and faster, thereby improving the test efficiency.

[0040] In a further preferred embodiment of the present invention, the density testing mechanism includes: a group of weighing devices 4 fixedly installed in the density testing chamber; a density measuring box 5 and a collecting box 6 fixedly installed on the group of weighing devices 4, respectively, the tops of the density measuring box 5 and the collecting box 6 are both open, and a rectangular frame 34 is provided on the top of the density measuring box 5; a water collecting hopper 7 fixedly mounted on the density measuring box 5; a drainage pipe 8 installed on one side of the water collecting hopper 7, the drainage pipe 8 is inclined and extends to the top of the collecting box 6.

[0041] In this embodiment, an external weighing device is first used to measure the mass (dry weight) of the duplex stainless steel 3D printed part in the air. After weighing, the electric magnet 13 is started to energize the electric magnet 13, and then the duplex stainless steel 3D printed part is placed under the electric magnet 13, so that the electric magnet 13 adsorbs the duplex stainless steel 3D printed part. Then, the one-way screw 10 drives the slider 11 to slide, and the test piece is transported into the box body 2 so that it is located above the density measurement box 5. Since the density measurement box 5 is filled with liquid (the liquid is usually water) in advance, when the test piece is located above the density measurement box 5, the electric winch 12 is started to release the cable so that the test piece is completely immersed in the liquid in the density measurement box 5, and then the electric magnet 13 is turned off to make the electric magnet 13 lose its magnetism, so that The test piece is discharged into the density measuring box 5, and the liquid level in the density measuring box 5 changes. After the test piece is stable, the rectangular frame 34 is slid up to keep it away from the density measuring box 5. Then, the excess water in the density measuring box 5 is discharged into the collecting box 6 through the density measuring box 5, the water collecting bucket 7 and the drain pipe 8. After the liquid in the density measuring box 5 is stable, the weighing device 4 is used again to measure its mass (wet weight) in water. According to the principle of Archimedes drainage method, the density and compactness of the test piece are calculated. After testing the density of the test piece, the test piece is slid up and away from the box body 2. Through the setting of the rectangular frame 34 and the water collecting bucket 7, the water overflowing from the density measuring box 5 can be effectively diverted, thereby ensuring that it will not be collected outside the water collecting bucket 7, which is conducive to the subsequent weighing operation of the water in the collecting box 6.

[0042] In a further preferred embodiment of the present invention, feed ports are provided on both sides of the box body 2, U-shaped plates 9 are fixed on both sides of the box body 2, a group of the U-shaped plates 9 are respectively located on one side of a group of the feed ports, a one-way screw 10 is rotatably installed on a group of the U-shaped plates 9, the one-way screw 10 penetrates the box body 2 through a group of feed ports, a slider 11 is threadedly sleeved 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 one of the U-shaped plates 9, and the output shaft of the first motor 14 is fixedly connected to the one-way screw 10.

[0043] In this embodiment, after the density of the test piece is tested, the first motor 14 is started, 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 translated to the top of the placement plate 26, and then the electric winch 12 releases the cable to place the test piece on the placement plate 26, and then the electric magnet 13 is turned off and the electric winch 12 is wound up to make the electric magnet 13 slide up and away from the test piece. Through the drive of the first motor 14 and the adsorption of the electric magnet 13, the automatic transportation of the duplex stainless steel 3D printed parts is realized, and the test efficiency is improved. At the same time, through the design of the electric magnet 13, the transportation system can be applicable to duplex stainless steel 3D printed parts of different sizes and shapes, thereby enhancing the versatility and flexibility of the device.

[0044] In a further preferred embodiment of the present invention, the mechanical property testing mechanism includes: a bidirectional screw 15 rotatably installed in the mechanical testing cavity; a group of mounting blocks 16 threadedly sleeved on the bidirectional screw 15; connecting plates 17 respectively installed on a group of the mounting blocks 16, and a tension sensor 18 is installed on any of the connecting plates 17; a group of placement racks 19 respectively fixedly installed on the tension sensor 18 and another connecting plate 17; a second motor 20 fixedly installed on one side of the box body 2, and the output shaft of the second motor 20 is fixedly connected to the bidirectional screw 15; and clamping mechanisms respectively arranged on a group of the placement racks 19 for fixing the 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, 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 group of mounting blocks 16 to slide, so that a group of placement racks 19 slide close to each other, and a group of placement racks 19 slide and contact the test piece, and then the second motor 20 is turned off, and then the holding mechanism is started, so that the pressure plate 22 fixes the test piece on the placement rack 19, and the anti-skid pad performs anti-skid treatment on it, and then the second motor 20 is started, so that the output shaft of the second motor 20 drives the bidirectional screw 15 to rotate, so that a group of mounting blocks 16 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, and the force value change during the test process is accurately measured by the tension sensor 18, so as to provide reliable data for the mechanical property evaluation of the duplex stainless steel 3D printed part, and at the same time, the second motor 20 drives the bidirectional screw 15 to realize the automated testing process, thereby 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 rack 19, the output rod of the hydraulic cylinder 21 extends into the placement rack 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 rack 19.

[0047] In this embodiment, the cooperation of the hydraulic cylinder 21 and the pressure plate 22 achieves stable fixation of the duplex stainless steel 3D printed part, ensuring stable position during the test. The provision of the anti-slip pad increases the friction between the printed part and effectively prevents sliding or falling off 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 tube 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 tube 24, the bottom end of the buffer spring 25 is fixedly connected to the top of the support rod 23, a placement plate 26 is fixedly installed on the top of the connecting tube 24, and the placement plate 26 is located between a group of the placement racks 19.

[0049] In this embodiment, the combined design of the support rod 23, the connecting tube 24 and the buffer spring 25 provides a stable support and buffering effect for the placement plate 26, thereby improving the stability during the test.

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

[0051] In this embodiment, the inclined inner wall bottom of the water collecting bucket 7 is conducive to the natural convergence and discharge of water flow, reducing the occurrence of water accumulation, thereby facilitating the water in the water collecting bucket 7 to be discharged into the collection box 6, and improving the water collection efficiency. The guide plate 27 provides a sliding path for the slider 11 and the mounting block 16 to ensure their stability and accuracy during movement, thereby helping to reduce mechanical wear and failure caused by poor sliding or offset.

[0052] In a further preferred embodiment of the present invention, a cover plate 28 is hingedly connected to one side of the feed port, and the cover plate 28 is located on one side of the mechanical testing chamber. A clamping block is rotatably installed on one side of the box body 2, and the clamping block is in rotational contact with the cover plate 28.

[0053] In this embodiment, when the box 2 is performing a performance test on the test piece, the cover 28 closes the feed port to prevent dust, debris or other unexpected substances from entering the mechanical test chamber, thereby protecting the cleanliness of the test environment and the normal operation of the equipment. At the same time, it can also prevent the test piece from being thrown out of the box 2. Through the setting of the card block, an additional locking function is provided for the cover 28 to prevent the cover 28 from loosening or opening due to accidental touch 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 box body 2, and the protective cover 29 is provided on the second motor 20. A connecting block 30 is fixedly installed on one side of the protective cover 29. A group of fixed blocks 31 are fixedly installed on one side of the box body 2. The connecting block 30 is located between a group of fixed blocks 31. An annular magnet 32 ​​is installed on the connecting block 30 located at the top. A connecting rope is installed on one side of the box body 2, and 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 a group of fixed blocks 31, and is adsorbed on 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 fixed block 31 on the box body 2, push the connecting block 30 until it enters between the fixed blocks 31, and then insert the metal rod 33 into the fixed block 31 and adsorb it on the annular magnet 32, so as to complete the quick installation of the protective cover 29. When disassembling, only need to gently pull up the connecting rope to make the metal rod 33 separate from the annular magnet 32, so as to easily remove the protective cover 29. The adsorption force between the annular magnet 32 ​​and the metal rod 33 ensures the stability of the protective cover 29 in the installed state, and avoids loosening or falling off due to vibration or external force.

[0056] The present invention also provides a testing method for a duplex stainless steel 3D printed part performance testing device, 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 the air. After weighing, start the electric magnet 13 to energize the electric magnet 13, then place the duplex stainless steel 3D printed part under the electric magnet 13, so that the electric magnet 13 adsorbs the duplex stainless steel 3D printed part, and then drive the slider 11 to slide to transport the test piece into the box 2 so that it is located above the density measurement box 5. Since the density measurement box 5 is filled with liquid (usually water) in advance, when the test piece is located above the density measurement box 5, start the electric winch 12 to release the cable so that the test piece is completely immersed in the density measurement box 5. The electric magnet 13 is then turned off to make the electric magnet 13 lose its magnetism, so that the test piece is discharged into the density measurement box 5. At the same time, the liquid level in the density measurement box 5 changes. After the test piece is stable, the rectangular frame 34 is slid upward to make it away from the density measurement box 5. Then, the excess water in the density measurement box 5 is discharged into the collection box 6 through the density measurement box 5, the water collecting bucket 7 and the drainage pipe 8. After the liquid in the density measurement box 5 is stable, the weighing device 4 is used again to measure its mass (wet weight) in water. According to the principle of Archimedes drainage method, the density and density of the test piece are calculated. After the density of the test piece is tested, the test piece is slid upward to be away from the box 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 translated to the top of the placement plate 26, and then the electric winch 12 releases the cable to place the test piece on the placement plate 26, and then the electric magnet 13 is turned off and the electric winch 12 is wound up with the cable, so that the electric magnet 13 slides up and 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, 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 group of mounting blocks 16 to slide, so that a group of placement racks 19 slide close to each other, so that a group of placement racks 19 slide and contact the test piece, and then the second motor 20 is turned off, and then the holding mechanism is started, so that the pressure plate 22 fixes the test piece on the placement rack 19, and the anti-skid pad performs anti-skid treatment on it, and then the second motor 20 is started, so that the output shaft of the second motor 20 drives the bidirectional screw 15 to rotate, so that a group of mounting blocks 16 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 block and open the cover 28 to expose the feed port, then use the one-way screw 10 and the electric magnet 13 together to move the test piece out of the box 2 to complete the density and mechanical performance test of the test piece.

[0061] In order to further improve the use effect of the device, in addition to the above scheme, this scheme also has 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 group of rotating rods 35 rotate in the density testing chamber, and a group of rotating rods 35 are fixedly sleeved with gears 36. A group of racks 37 are fixedly installed on one side of the rectangular frame 34, and a group of the racks 37 are respectively meshed with a group of the gears 36. A group of the racks 37 are each provided with a guide opening, and a group of guide blocks are fixedly installed in the box body 2, and a group of the guide blocks are respectively slidably connected with a group of the guide openings.

[0063] In this embodiment, after the test piece is placed in the density measuring box 5, the liquid level in the density measuring box 5 is higher than the density measuring box 5. At this time, the liquid level is located in the rectangular frame 34. When the test piece is stable in the density measuring box 5, the rotating rod 35 is rotated, so that the rotating rod 35 drives the gear 36 to rotate synchronously, thereby driving the driving rack 37 to slide, so that the rack 37 drives the rectangular frame 34 to slide up synchronously, and the rectangular frame 34 slides up and away from the density measuring box 5. After that, the water overflowing from the density measuring box 5 is discharged into the water collecting bucket 7 through the gap exposed when the rectangular frame 34 slides up, and then discharged into the collecting box 6 through the drain pipe 8. The sealing ring ensures the sealing of the density measuring box 5 and the rectangular frame 34 during the test to prevent 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 a group of the rotating rods 35, a first chain 39 is sleeved on a group of the driven sprockets 38, the first chain 39 is meshed with a group of the driven sprockets 38, a differential sprocket 40 is fixedly sleeved on any of the rotating rods 35 and the one-way screw 10, a second chain 41 is sleeved on a group of the differential sprockets 40, the second chain 41 is meshed with a group of the differential sprockets 40, and the first chain 39, the second chain 41, a group of the driven sprockets 38 and a group of the differential sprockets 40 are all located in the protective cover 29.

[0065] In this embodiment, when the rectangular frame 34 is moved, the second motor 20 is first started so that the output shaft of the second motor 20 drives the bidirectional screw 15 to rotate, and the bidirectional screw 15 drives the differential sprocket 40 to rotate. The rotation is transmitted to a group of rotating rods 35 through the second chain 41, the driven sprocket 38 and the second chain 41, so that a group of rotating rods 35 rotate synchronously, and the rectangular frame 34 slides up and down. At the same time, the bidirectional screw 15 drives a group of placement racks 19 to slide close to each other. When 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, and a group of placement racks 19 and the rectangular frame 34 are reset.

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

[0067] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work 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, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A duplex stainless steel 3D printed part performance testing device, characterized in that: include: A base (1) and a box (2) fixedly mounted on the base (1); A partition (3) fixedly mounted in the box (2), the partition (3) separating the box (2) into a density test chamber and a mechanical test chamber; A density testing mechanism provided in the density testing chamber for density testing of duplex stainless steel 3D printed parts; A mechanical properties testing mechanism is provided in the mechanical testing chamber and is used for testing the mechanical properties of duplex stainless steel 3D printed parts.

2. The duplex stainless steel 3D printed part performance testing device according to claim 1, characterized in that: The density testing mechanism comprises: A set of weighing devices (4) are fixedly installed in the density testing cavity; A density measurement box (5) and a collection box (6) respectively fixedly mounted on a group of the weighing devices (4), the tops of the density measurement box (5) and the collection box (6) are both arranged in an open shape, and a rectangular frame (34) is arranged on the top of the density measurement box (5); A water collecting hopper (7) fixedly mounted on the density measuring box (5); A drainage pipe (8) is installed on one side of the water collecting bucket (7), and the drainage pipe (8) is arranged in an inclined shape and extends to the top of the collection box (6).

3. The duplex stainless steel 3D printed part performance testing device according to claim 2, characterized in that: Both sides of the box body (2) are provided with feed ports, and both sides of the box body (2) are fixed with U-shaped plates (9), a group of the U-shaped plates (9) are respectively located on one side of a group of the feed ports, a one-way screw (10) is rotatably mounted on a group of the U-shaped plates (9), the one-way screw (10) passes through the box body (2) through a group of the feed ports, a slider (11) is threadedly sleeved on the one-way screw (10), an electric winch (12) is mounted at the bottom of the slider (11), and an electric magnet (13) for conveying duplex stainless steel 3D printed parts is mounted on the cable of the electric winch (12), and a first motor (14) is fixedly mounted on one side of any one of the U-shaped plates (9), and an output shaft of the first motor (14) is fixedly connected to the one-way screw (10).

4. The duplex stainless steel 3D printed part performance testing device according to claim 3, characterized in that: The mechanical properties testing mechanism includes: Rotating a bidirectional screw (15) installed in the mechanical testing chamber; A set of mounting blocks (16) threadably sleeved on the bidirectional screw (15); Connecting plates (17) respectively mounted on a group of the mounting blocks (16), and a tension sensor (18) is 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) is fixedly mounted on one side of the box (2), and an output shaft of the second motor (20) is fixedly connected to the bidirectional screw (15); A clamping mechanism is respectively arranged on a group of the placement racks (19) and is used to fix the duplex stainless steel 3D printed parts.

5. The duplex stainless steel 3D printed part performance testing device according to claim 4, characterized in that: The clamping mechanism comprises: A hydraulic cylinder (21) installed at the bottom of the placement rack (19), wherein an output rod of the hydraulic cylinder (21) extends into the placement rack (19); A pressure plate (22) fixedly mounted on an output rod of the hydraulic cylinder (21); Anti-skid pads are respectively mounted on the top of the inner wall of the pressing plate (22) and the placing frame (19).

6. The duplex stainless steel 3D printed part performance testing device according to claim 4, characterized in that: A support rod (23) is fixedly installed at the bottom of the mechanical testing chamber, a connecting tube (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 tube (24), the bottom end of the buffer spring (25) is fixedly connected to the top of the support rod (23), a placement plate (26) is fixedly installed on the top of the connecting tube (24), and the placement plate (26) is located between a group of placement racks (19).

7. The duplex stainless steel 3D printed part performance testing device according to claim 4, characterized in that: Guide plates (27) are fixedly installed inside the box body (2) and on the U-shaped plate (9), and a plurality of guide plates (27) are in sliding contact with the slider (11) and the mounting block (16) respectively. The bottom of the inner wall of the water collecting bucket (7) is arranged in an inclined shape.

8. The duplex stainless steel 3D printed part performance testing device according to claim 3, characterized in that: A cover plate (28) is hingedly connected to one side of the feed port, and the cover plate (28) is located on one side of the mechanical testing chamber. A clamping block is rotatably mounted on one side of the box body (2), and the clamping block is in rotational contact with the cover plate (28).

9. The duplex stainless steel 3D printed part performance testing device according to claim 4, characterized in that: A protective cover (29) is provided on one side of the box body (2), and the protective cover (29) is provided on the second motor (20). A connecting block (30) is fixedly installed on one side of the protective cover (29). A group of fixed blocks (31) is fixedly installed on one side of the box body (2), and the connecting block (30) is located between the group of fixed blocks (31). An annular magnet (32) is installed on the connecting block (30) located at the top. A connecting rope is installed on one side of the box body (2), and 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 group of fixed blocks (31) and is adsorbed on the annular magnet (32).

10. The testing method of the duplex stainless steel 3D printed part performance testing device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: First, use an external weighing device to measure the mass of the duplex stainless steel 3D printed part in the air. After weighing, start the electric magnet (13) to energize the electric magnet (13). Then, place the duplex stainless steel 3D printed part under the electric magnet (13), so that the electric magnet (13) adsorbs the duplex stainless steel 3D printed part. Then, drive the slider (11) to slide by the one-way screw (10) to transport the test piece into the box (2) so that it is located above the density measurement box (5). Since the density measurement box (5) is filled with liquid in advance, when the test piece is located above the density measurement box (5), start the electric winch (12) to release the cable so that the test piece is completely immersed in the liquid in the density measurement box (5). The electric magnet (13) is then turned off to make the electric magnet (13) lose its magnetism, thereby causing the test piece to be discharged into the density measurement box (5). At the same time, the liquid level in the density measurement box (5) changes. After the test piece is stable, the rectangular frame (34) is slid upward to make it away from the density measurement box (5). Then, excess water in the density measurement box (5) is discharged into the collection box (6) through the density measurement box (5), the water collecting bucket (7) and the drainage pipe (8). After the liquid in the density measurement box (5) is stable, the weighing device (4) is used again to measure its mass in water. The density and compactness of the test piece are calculated according to the principle of Archimedes' displacement method. After the density of the test piece is tested, the test piece is slid upward to be away from the box (2); 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 translated to the top of the placement plate (26), and then the electric winch (12) releases the cable, so that the test piece is placed on the placement plate (26), and then the electric magnet (13) is turned off and the electric winch (12) is wound up with the cable, so that the electric magnet (13) slides up and away from the test piece; Step 3: After the test piece is placed on the placement plate (26), the second motor (20) is started, 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 group of mounting blocks (16) to slide, so that a group of placement racks (19) slide close to each other, so that a group of placement racks (19) slide and contact the test piece, and then the second motor (20) is turned off, and then the holding 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-skid pad performs anti-skid treatment on it, and then the second motor (20) is started, so that the output shaft of the second motor (20) drives the bidirectional screw (15) to rotate, so that a group of mounting blocks (16) slide away from each other, and during the movement process, 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, the block is rotated and the cover (28) is opened to expose the feed port. The one-way screw (10) and the electric magnet (13) are then used in combination 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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