Selective laser melting device for forming die machining

Abstract

The invention discloses a selective laser melting device for forming die machining, and relates to the technical field of forming die machining, a laser is used for machining powder, a feeder conveys the powder to a lifting table, and a recovery bin is used for receiving the powder recovered by a recovery device; the lifting table, the feeder and the recovery bin are sequentially connected, the laser is arranged over the lifting table, a recovery device is arranged on the driving part, the driving part can drive the recovery device to move to the position above the lifting table, and the recovery device is used for recovering powder on the lifting table. By arranging the scraping plates, the servo motor and the fan, after mold machining is completed, the scraping plates can be accurately controlled to be close to one another by means of cooperative operation of the servo motor, the two-way screw rod, the sliding block and the air cylinder, a suction opening is formed in the bottom of each scraping plate, and residual metal powder in the machine body can be efficiently sucked and collected in cooperation with the fan; tediousness and low efficiency of manual cleaning are avoided, the labor cost is saved, the cleaning process is accelerated, and the overall machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of forming mold processing, and in particular to a selective laser melting device for forming mold processing. Background Art

[0002] During the production and processing of the mold, if the mold is relatively complex, a selective laser melting device is needed to process the mold. The selective laser melting device is an additive manufacturing technology, mainly used for 3D printing of metal materials. It uses a high-power laser to melt metal powder layer by layer on a powder bed to form a complex three-dimensional structure.

[0003] After the mold is processed by the selective laser melting device, the excess metal powder needs to be sucked out through a straw, and then the machine body is opened to take out the processed mold. Although the metal powder can be sucked out through the straw, due to the small diameter of the pipe and the limited suction area, it takes a long time to suck out the metal powder, and the suction efficiency needs to be improved. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a selective laser melting device for molding mold processing. The present invention arranges a scraper plate, a servo motor and a fan. After the mold processing is completed, the scraper plates can be accurately controlled to approach each other through the coordinated operation of the servo motor, the bidirectional screw, the slider and the cylinder to form a suction port at the bottom thereof. In conjunction with the fan, the metal powder remaining in the machine body can be efficiently sucked and collected, avoiding the tedious and inefficient manual cleaning, saving labor costs, speeding up the cleaning process, and improving the overall processing efficiency.

[0005] The present invention achieves the above technical objectives through the following technical means.

[0006] A selective laser melting device for processing a forming mold comprises a machine body, a laser, a lifting platform, a feeder, a recovery bin and a driving member; the laser is used to process powder, the feeder sends powder to the lifting platform, and the recovery bin is used to receive powder recovered by the recovery device; the machine body has built-in lasers, a lifting platform, a feeder, a recovery bin and a driving member; wherein the lifting platform, the feeder and the recovery bin are connected in sequence, the laser is arranged directly above the lifting platform, the recovery device is arranged on the driving member, the driving member can drive the recovery device to move above the lifting platform, and the recovery device is used to recover the powder on the lifting platform.

[0007] In the above scheme, the recovery device includes a mounting plate, a storage box, a fan, a hanging plate and a side plate; two storage boxes are arranged above the mounting plate, and the two storage boxes are connected by a fixed plate, a bidirectional screw is supported between the fixed plates, a slider is arranged on the bidirectional screw, a cylinder is arranged under the slider, and the cylinder passes through the through hole on the mounting plate and is connected to the scraper plate; side plates are arranged on both sides of the scraper plate, a cavity is formed between the scraper plate and the side plates, one side of one of the cavities is provided with an air extraction hole, the air extraction hole is connected with one end of a connecting hose, and the other end of the connecting hose is connected with an air inlet hole, and the air inlet hole is provided on the side wall of the storage box, a square plate is obliquely arranged in the storage box, one end of the square plate is connected to one end of an inclined plate through a connecting square ring, and the other end of the inclined plate is extended into the discharge square pipe; the fan is arranged on the air inlet hole opened in the storage box.

[0008] In the above solution, the bidirectional screw and the mounting plate are arranged in parallel.

[0009] In the above solution, the square plate is connected to the bottom of the storage box via a spring, and a vibrator is provided below the square plate.

[0010] In the above scheme, the upper part of the square plate is connected to a connecting rod, an outer filter core is arranged on the connecting rod, and an inner filter core is arranged inside the outer filter core; the air inlet is communicated with the openings of the inner filter core and the outer filter core.

[0011] In the above solution, the outer filter element is an inverted cone structure.

[0012] In the above scheme, the outlet end of the discharging square tube is rotatably connected with a baffle, and a steering gear is fixed to the side of the discharging square tube, and the steering gear is used to rotate the baffle to open or close the outlet end of the discharging square tube.

[0013] In the above solution, the width of the discharge square tube is smaller than the width of the feed port of the recovery bin.

[0014] In the above solution, the connecting square ring is a rubber ring.

[0015] In the above solution, the storage box is provided with an ear plate with a hole, and the driving member passes through the ear plate with a hole and drives the ear plate to drive the storage box to move.

[0016] Beneficial effects:

[0017] 1. In the present invention, by setting a scraper plate, a servo motor and a fan, after the mold processing is completed, with the help of the coordinated operation of the servo motor, the bidirectional screw, the slider and the cylinder, the scraper plates can be accurately controlled to approach each other, so that a suction port is formed at the bottom. In conjunction with the fan, the metal powder remaining in the machine body can be efficiently sucked and collected, avoiding the tedious and inefficient manual cleaning, saving labor costs, speeding up the cleaning process, and improving the overall processing efficiency.

[0018] 2. In the present invention, an outer filter element and an inner filter element are arranged in the storage box, and the double filtering structure can effectively prevent metal powder from being discharged from the storage box, which can not only prevent the powder from escaping and causing environmental pollution, but also ensure the cleanliness of the interior of the storage box, which is conducive to the stable operation of the equipment; and the square plate and the connecting rod are linked to make the outer filter element vibrate continuously under the action of the vibrator and the spring, so as to avoid the accumulation of metal powder and maintain the stability and long-term effectiveness of the filtering effect.

[0019] 3. In the present invention, a steering gear and a baffle are provided, and the discharging square tube is matched with the steering gear and the baffle. When the discharging square tube moves to the top of the recovery bin, the steering gear rotates the baffle to realize the directional and precise discharging of the metal powder, and the metal powder falls directly into the recovery bin, which is convenient for subsequent unified cleaning and recycling, and optimizes the waste treatment process.

[0020] 4. In the present invention, by arranging square plates and inclined plates, the obliquely arranged square plates and inclined plates in the storage box, in conjunction with springs and vibrators, can not only guide the metal powder to slide smoothly, but also break up the powder that may be agglomerated by vibration, thereby preventing material accumulation from blocking the discharge channel, ensuring smooth material transportation, and maintaining the continuous operation capability of the device.

[0021] 5. In the present invention, a connecting square ring is provided. The connecting square ring is made of a rubber ring material and has good flexibility and sealing properties. It can not only firmly fix the square plate, but also prevent metal powder from leaking from the gap, thereby enhancing the overall sealing of the storage box and reducing the risk of equipment loss and environmental pollution caused by powder leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a selective laser melting device for forming mold processing;

[0023] Figure 2 It is a schematic cross-sectional view of the machine body;

[0024] Figure 3 for Figure 2 Schematic diagram of the recovery device structure involved in;

[0025] Figure 4 for Figure 3 Schematic cross-sectional view of ;

[0026] Figure 5 for Figure 3 A diagram showing a storage box removed.

[0027] Reference numerals:

[0028] 1-machine body; 2-laser; 3-lifting platform; 4-feeder; 5-recovery bin; 6-driving part; 7-mounting plate; 8-through hole; 9-storage box; 10-fixed plate; 11-servo motor; 12-bidirectional screw; 13-slider; 14-cylinder; 15-scraper plate; 16-side plate; 17-suction hole; 18-discharging square pipe; 19-stop bar; 20-servo engine; 21-air inlet; 22-connecting hose; 23-air outlet; 24-fan; 25-inner filter element; 26-outer filter element; 27-inclined plate; 28-square plate; 29-connecting square ring; 30-spring; 31-vibrator; 32-connecting rod. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1-Figure 5As shown, the embodiment of the present invention provides a selective laser melting device for forming mold processing, including a body 1 and a laser 2 installed in the body 1, a lifting platform 3 is fixed at the bottom of the inner wall of the body 1, and the lifting platform 3 can drive the material to rise or fall. The lifting platform 3 is located below the laser 2, and a feeder 4 is fixed on the side of the elevator. The feeder 4 is used to feed upwards, and the metal powder is fed upwards. A recovery bin 5 is fixed on the side of the feeder 4, and the recovered metal powder can be recovered in the recovery bin 5, and also includes:

[0033] The mounting plate 7 is located in the machine body 1. Two storage boxes 9 are fixed on the top of the mounting plate 7. A driving member 6 is provided in the machine body 1. The driving member 6 is used to drive the movement of the storage box 9. Two through holes 8 are provided on the mounting plate 7. A fixing plate 10 is fixed between the two storage boxes 9. A servo motor 11 is fixed on the side of the fixing plate 10. The output end of the servo motor 11 movably passes through the fixing plate 10 and is fixed with a bidirectional screw 12. The threads at both ends of the bidirectional screw 12 are opposite. When the bidirectional screw 12 is rotating, the bidirectional screw 12 can drive the two sliders 13 on the bidirectional screw 12 to move toward or away from each other. The surface threads of the bidirectional screw 12 have two sliders 13. The sides of the two sliders 13 are close to the sides of the storage box 9. Cylinders 14 are fixed to the bottom of the two sliders 13. The output ends of the two cylinders 14 are movably connected in the through holes 8. Scraper plates 15 are fixed to the output ends of the two cylinders 14. The sides of the two scraper plates 15 are fixed The side plate 16 and the scraper plate 15 are provided with suction holes 17 on their sides, and the side of the storage box 9 is provided with an air inlet hole 21. The suction hole 17 of the scraper plate 15 is connected with a connecting hose 22, and the other end of the connecting hose 22 is connected with the air inlet hole 21 of the storage box 9. The top of the storage box 9 is provided with an air outlet hole 23, and a fan 24 is fixed at the air outlet hole 23 of the storage box 9. An outer filter element 26 is fixed on the inner wall of the storage box 9 and located at the air outlet hole 23. The storage box 9 is away from the air inlet hole. A discharge port is provided on one side of 21, and the discharge port of the storage box 9 is connected to a discharge square tube 18, and a baffle 19 is rotatably connected to the bottom of the inner wall of the discharge square tube 18, and a steering gear 20 is fixed to the side of the discharge square tube 18, and the output end of the steering gear 20 movably passes through the discharge square tube 18 and is fixed to the side of the baffle 19. Under the control of the steering gear 20, the baffle 19 can be opened and closed as needed, and the discharge timing and flow rate can be accurately controlled to accurately discharge the powder into the recovery bin 5, which is convenient for unified management of waste materials and subsequent recovery.

[0034] like Figure 4 As shown, in this embodiment, an inner filter element 25 is fixed on the inner wall of the storage box 9 and on one side of the air outlet 23. The inner filter element 25 is located inside the outer filter element 26. The inner filter element 25 further enhances the filtering effect. The double filtering structure can firmly block the metal powder, especially prevent the outer filter element 26 from causing powder to be discharged due to accidents such as vibration and airflow impact, thereby ensuring the cleanliness of the air outlet of the storage box 9 and reducing the risk of dust pollution.

[0035] like Figure 4 As shown, in this embodiment, a square plate 28 is provided inside the storage box 9, and a connecting square ring 29 is fixed on the side of the square plate 28, and the connecting square ring 29 is fixed in the storage box 9. The square plate 28 is tilted, and an inclined plate 27 with the same inclination angle as the square plate 28 is fixed on the side of the connecting square ring 29. A spring 30 is fixed between the bottom of the square plate 28 and the storage box 9, and a vibrator 31 is fixed to the bottom of the square plate 28. The inclination of the square plate 28 is conducive to the smooth sliding of the metal powder under the dual effects of gravity and vibration; the connecting square ring 29 fixes the square plate 28, and the connecting square ring 29 made of rubber can also seal and prevent leakage; the inclined plate 27 assists in guiding the powder to slide down; the spring 30 cooperates with the vibrator 31 to make the square plate 28 vibrate at a high frequency to break up the powder that may be agglomerated, prevent accumulation and blockage, maintain smooth material flow, and can also drive the outer filter element 26 to vibrate with the help of the connecting rod 32 to avoid powder adhesion.

[0036] like Figure 4 As shown, in this embodiment, the connecting square ring 29 is a rubber ring. Rubber is a material with good elasticity and sealing properties. The connecting square ring 29 is a component for fixing the square plate 28. Its rubber material can fit tightly against the inner wall of the storage box 9 and the side of the square plate 28. When there is metal powder in the storage box 9, the rubber ring can effectively prevent the powder from leaking from the connecting gap between the square plate 28 and the storage box 9. The rubber ring can play a role in buffering and shock absorption. When the vibrator 31 is working, vibration will be generated and transmitted to the square plate 28, and the rubber ring can absorb part of the vibration energy, which helps to reduce the impact of vibration on the overall structure of the storage box 9 and reduce the problems of loosening and fatigue damage of the connection parts of the storage box 9 that may be caused by long-term vibration. At the same time, for the square plate 28 itself, the buffering of the rubber ring can also prevent it from violently colliding with the storage box 9 due to excessive vibration, thereby protecting the structural integrity of the square plate 28 and extending its service life.

[0037] like Figure 4 As shown, in this embodiment, a connecting rod 32 is fixed to the top of the square plate 28, and the top of the connecting rod 32 is fixed to the surface of the outer filter element 26. The connecting rod 32 links the square plate 28 and the outer filter element 26. When the vibrator 31 is working, the outer filter element 26 vibrates accordingly to shake off the attached powder, maintain the filtering effect, and prevent the filtering efficiency from being reduced due to powder accumulation.

[0038] like Figure 5 As shown, in this embodiment, the width of the slider 13 on the side close to the storage box 9 is greater than the width of the middle part of the slider 13. This structural design increases the contact area and connection stability between the slider 13 and the storage box 9, ensuring that the slider 13 is not easy to shake or deflect when moving or subjected to force, thereby ensuring the precise execution of scraping and suction actions.

[0039] like Figure 3 and Figure 5 As shown, in this embodiment, a rubber strip is fixed to the side of the side plate 16, and the rubber strip is used to increase the sealing of the side of the side plate 16. When the two side plates 16 are close to each other, gas is prevented from entering from the side of the side plate 16, thereby avoiding affecting the efficiency of sucking metal powder.

[0040] like Figure 3-Figure 5 As shown, in this embodiment, the width of the discharge square tube 18 is smaller than the width of the feed port of the recovery bin 5, which facilitates the discharge square tube 18 to accurately discharge the metal powder into the recovery bin 5, avoiding powder overflow due to size problems during discharge, ensuring accurate waste recovery, and maintaining the cleanliness of the area around the recovery bin 5.

[0041] like Figure 5 As shown, in this embodiment, the bidirectional screw 12 is arranged in parallel with the mounting plate 7 to ensure that the slider 13 moves smoothly and has good straightness, avoids the slider 13 from getting stuck or deflected due to the inclination of the screw, and allows the scraper plate 15 to move stably and accurately, which is conducive to efficient cleaning of metal powder.

[0042] like Figure 4 As shown, in this embodiment, the outer filter element 26 is conical. When the fan 24 is working to generate airflow, the conical outer filter element 26 can guide the airflow to gradually slow down and change direction along its conical surface. The movement path of the airflow on the conical surface becomes longer, so that the metal powder has more opportunities to be intercepted under the dual effects of centrifugal force and filter blocking. This shape helps to evenly distribute the airflow on the surface of the filter element. At the end close to the air inlet, the airflow speed is relatively fast. As it moves toward the top of the cone, the airflow speed gradually decreases, avoiding the situation where the local airflow is too fast and causes the powder to penetrate the filter, thereby improving the stability and reliability of the filtration. After being intercepted, the metal powder will slide down along the inclined surface of the conical outer filter element 26 due to gravity. This natural sliding method helps to prevent the powder from accumulating on the surface of the filter element, avoiding the filter element from being blocked due to excessive accumulation, affecting the filtering effect and ventilation performance.

[0043] Working principle: the material to be processed is sent to the lifting platform 3 in the machine body 1, ready for selective laser melting processing, the laser 2 is in working state, and the recycling bin 5 is in place for subsequent waste recycling;

[0044] The laser 2 is started to perform selective laser melting processing on the material on the lifting platform 3 to form a forming mold; during this period, the feeder 4 supplies materials as needed, and the lifting platform 3 cooperates to adjust its position;

[0045] After the mold processing is completed, the servo motor 11 is started, and the servo motor 11 drives the bidirectional screw 12 to rotate. Since the surface of the bidirectional screw 12 is threadedly connected to the two sliders 13, the rotation of the bidirectional screw 12 causes the two sliders 13 to approach each other; the sliders 13 drive the cylinders 14 to approach each other, and during the process, one of the cylinders 14 contracts as needed until both cylinders 14 are in a contracted state, so that the scraper plates 15 at the output ends of the cylinders 14 approach each other until the side plates 16 on the sides of the two scraper plates 15 fit together, and at this time, a suction port is formed at the bottom of the two scraper plates 15;

[0046] The recovery device is driven by the driving member 6 to move the scraper plate 15 to the area where the metal powder remains in the machine body 1; at the same time, the fan 24 is started to form a suction force at the suction port at the bottom of the scraper plate 15, and the metal powder is directly sucked up when the suction port passes over the metal powder; the metal powder enters the storage box 9 through the suction hole 17 of the scraper plate 15 and the connecting hose 22;

[0047] The metal powder entering the storage box 9 slides along the square plate 28. At this time, the vibrator 31 is started, and the vibrator 31 drives the square plate 28 to vibrate on the spring 30. The square plate 28 drives the outer filter element 26 to vibrate through the connecting rod 32 to prevent the metal powder from accumulating on the outer filter element 26, and at the same time, the metal powder slides down smoothly; the inner filter element 25 in the storage box 9 further filters the metal powder to prevent the outer filter element 26 from vibrating and causing the metal powder to be discharged;

[0048] The recovery device is driven to move by the driving member 6, driving the storage box 9 and the connected discharge square tube 18 to move together. When the discharge square tube 18 is located above the recovery bin 5, the steering gear 20 is started, and the steering gear 20 drives the baffle 19 to rotate, so that the metal powder can fall from the discharge square tube 18 and directly fall into the recovery bin 5, completing the cleaning and recovery of the metal powder, which is convenient for subsequent centralized processing.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A selective laser melting device for forming mold processing, characterized in that: The invention comprises a machine body (1), a laser (2), a lifting platform (3), a feeder (4), a recovery bin (5) and a driving member (6); the laser (2) is used to process powder, the feeder (4) sends powder to the lifting platform (3), and the recovery bin (5) is used to receive powder recovered by the recovery device; the machine body (1) is equipped with a laser (2), a lifting platform (3), a feeder (4), a recovery bin (5) and a driving member (6); wherein the lifting platform (3), the feeder (4) and the recovery bin (5) are connected in sequence, the laser (2) is arranged directly above the lifting platform (3), the recovery device is arranged on the driving member (6), the driving member (6) can drive the recovery device to move above the lifting platform (3), and the recovery device is used to recover powder on the lifting platform (3).

2. The selective laser melting device for molding die processing according to claim 1, characterized in that: The recovery device comprises a mounting plate (7), a storage box (9), a fan (24), a hanging plate (15) and a side plate (16); two storage boxes (9) are arranged above the mounting plate (7), the two storage boxes (9) are connected by a fixing plate (10), a bidirectional screw rod (12) is supported between the fixing plates (10), a slider (13) is arranged on the bidirectional screw rod (12), a cylinder (14) is arranged below the slider (13), the cylinder (14) passes through a through hole (8) on the mounting plate (7) and is connected to the scraper plate (15); side plates (16) are arranged on both sides of the scraper plate (15), and the scraper plate (15) is provided with a plurality of side plates (16) on the sides of the scraper plate (15). A cavity is formed between the plate (15) and the side plate (16), one side of which is provided with an air extraction hole (17), the air extraction hole (17) being communicated with one end of a connecting hose (22), the other end of the connecting hose (22) being communicated with an air inlet hole (21), the air inlet hole (21) being provided on the side wall of the storage box (9), a square plate (28) being obliquely provided inside the storage box (9), one end of the square plate (28) being connected to one end of an inclined plate (27) through a connecting square ring (29), the other end of the inclined plate (27) being extended into the discharge square tube (18); the fan (24) being provided on the air inlet hole (21) provided in the storage box (9).

3. The selective laser melting device for molding die processing according to claim 1, characterized in that: The bidirectional screw (12) and the mounting plate (7) are arranged in parallel.

4. The selective laser melting device for molding die processing according to claim 1, characterized in that: The square plate (28) is connected to the bottom of the storage box (9) via a spring (30), and a vibrator (31) is provided below the square plate (28).

5. The selective laser melting device for molding die processing according to claim 1, characterized in that: The upper portion of the square plate (28) is connected to a connecting rod (32), an outer filter core (26) is arranged on the connecting rod (32), and an inner filter core (25) is arranged inside the outer filter core (26); the air inlet (21) is in communication with the openings of the inner filter core (25) and the outer filter core (26).

6. The selective laser melting device for molding die processing according to claim 5, characterized in that: The outer filter core (26) is an inverted cone-shaped structure.

7. The selective laser melting device for molding die processing according to claim 1, characterized in that: The outlet end of the discharging square tube (18) is rotatably connected to a baffle (19), and a steering gear (20) is fixed to the side of the discharging square tube (18). The steering gear (20) is used to rotate the baffle (19) to open or close the outlet end of the discharging square tube (18).

8. The selective laser melting device for molding die processing according to claim 2 or 7, characterized in that: The width of the discharge square tube (18) is smaller than the width of the feed opening of the recovery bin (5).

9. The selective laser melting device for molding die processing according to claim 1, characterized in that: The connecting square ring (29) is a rubber ring.

10. The selective laser melting device for molding die processing according to claim 1, characterized in that: The storage box (9) is provided with an ear plate with a hole, and the driving member passes through the ear plate with a hole and drives the ear plate to drive the storage box (9) to move.

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