Multifunctional scraper mechanism and additive manufacturing equipment

Abstract

The utility model discloses a multifunctional scraper mechanism and additive manufacturing equipment, the multifunctional scraper mechanism comprises a supporting frame, a scraper assembly and a warping removing assembly, the scraper assembly comprises a scraper up-down driving module, a scraper seat and a scraper, and the scraper is arranged at the bottom of the scraper seat; the warping removing assembly comprises a mounting base, an up-down driving module, a left-right driving module, an ultrasonic knife, a scrap collecting module and a plurality of recycling holes, the mounting base is connected with the up-down driving module, the bottom of the mounting base is of an open structure, and the ultrasonic knife and the scrap collecting module are slidably arranged at the bottom opening of the mounting base; and the driving module is driven by the up-and-down driving module to move up and down along with the mounting seat, and driven by the left-and-right driving module to move along the length direction of the mounting seat. The warping phenomenon of a sintering area in the additive manufacturing process is restrained through the ultrasonic knife, damage of warping to a scraper in the part printing process can be relieved, and the downtime in the printing process is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of additive manufacturing, and specifically relates to a multifunctional scraper mechanism and additive manufacturing equipment. Background Art

[0002] Additive manufacturing technology is an advanced manufacturing technology with distinctive features such as digital manufacturing, high flexibility and adaptability, direct CAD model drive, fast, and rich and diverse material types. Since it is not limited by the complexity of the part shape and does not require any tooling, it has a very wide range of applications. Selective Laser Sintering (SLS) is one of the additive manufacturing technologies that has developed rapidly in recent years. It uses powder materials as raw materials and uses lasers to scan the cross-section of three-dimensional entities layer by layer to complete prototype manufacturing. Its basic working process is: the powder feeding device delivers a certain amount of powder to the working platform surface, the powder spreading device spreads a layer of powder material on the bottom plate of the working cavity or the upper surface of the formed part, and the laser galvanometer system controls the laser to scan the solid part powder layer according to the cross-sectional profile of the layer with an approximately constant spot size and beam energy, so that the powder melts and bonds with the formed part below; when a layer of cross section is sintered, the working platform drops a layer of thickness, and the powder spreading device spreads a layer of uniform and dense powder on it, and scans and sinters a new layer of cross section, and after several layers of scanning and superposition, the entire prototype manufacturing is completed.

[0003] With the development of additive manufacturing technology, it has given printed parts greater design freedom. However, the increase in design freedom is accompanied by the appearance of complex shapes in parts. In addition, the molding characteristics of additive manufacturing make parts prone to warping during the molding process, resulting in the inability to form parts.

[0004] At present, one way to solve the warping phenomenon in the printing process is to adjust the process parameters after the molding fails. However, the effect of adjusting the process parameters for small-angle molding surfaces is limited. Another way is to perform defect detection, discover and shut down the machine when the defects are initially formed, open the cavity door and knock on the warped parts. This method can only trace the problem but does not solve it. Utility Model Content

[0005] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides a multifunctional scraper mechanism and additive manufacturing equipment. The scraper mechanism has a simple structure and occupies a small space. While realizing the scraper function, the warped parts can be removed in time, thereby improving production quality while improving production efficiency and reducing production costs.

[0006] To achieve the above-mentioned purpose, the utility model provides a multifunctional scraper mechanism, including a support frame, and a scraper assembly and a warp removal assembly arranged in the support frame, wherein:

[0007] The scraper assembly comprises a scraper up and down driving module, a scraper seat and a scraper, wherein the scraper up and down driving module is arranged in the support frame, the scraper seat is connected to the scraper up and down driving module, and the scraper is arranged at the bottom of the scraper seat and moves up and down following the scraper seat under the drive of the scraper up and down driving module;

[0008] The warp removal component includes a mounting seat, an upper and lower driving module, a left and right driving module, an ultrasonic knife, a residual chip collection module and a plurality of recovery holes. The upper and lower driving module is arranged in a support frame, and the mounting seat is connected to the upper and lower driving modules. The top of the mounting seat is provided with the plurality of recovery holes at intervals, and the bottom is an open structure. The ultrasonic knife and the residual chip collection module are slidably arranged at the bottom opening of the mounting seat, and under the drive of the upper and lower driving modules, they follow the mounting seat to move up and down, and under the drive of the left and right driving modules, they move along the length direction of the mounting seat to remove the warping of the sintering area and recover the residual chips, and the recovered residual chips are recovered through the recovery holes.

[0009] As a further preferred embodiment of the present invention, the debris collection module is an impeller mechanism and a drive mechanism, the impeller mechanism includes a plurality of impeller blades, a recovery channel is formed between adjacent impeller blades, and the drive mechanism drives the impeller mechanism to rotate to rotate the debris to the recovery channel.

[0010] As a further preferred embodiment of the present invention, the scraper mechanism also includes a recycling box, a vacuum mechanism and a pipeline. The recycling box is connected to a plurality of recycling holes through the pipeline. The vacuum mechanism vacuums the recycling box so that the residual chips in the recycling channel are sucked into the recycling box through the plurality of recycling holes.

[0011] As a further preferred solution of the utility model, the ultrasonic knife is arranged adjacent to the impeller mechanism and is relatively stationary, so that the residual chips can be recovered by the residual chip collection module.

[0012] As a further preferred embodiment of the present invention, a surface of the ultrasonic knife close to the impeller mechanism is arc-shaped, and during the rotation of the impeller mechanism, the arc-shaped surface of the ultrasonic knife is in interference fit with part of the impeller blades of the impeller mechanism.

[0013] As a further preferred solution of the present invention, the scraper seat and the mounting seat are arranged in parallel.

[0014] As a further preferred solution of the utility model, the scraper up and down driving module is connected to the scraper seat through a plurality of first telescopic rods, and the up and down driving module is connected to the mounting seat through a plurality of second telescopic rods.

[0015] As a further preferred embodiment of the present invention, the plurality of recovery holes are equidistantly distributed along the length direction of the mounting seat.

[0016] As a further preferred solution of the utility model, the scraper is made of elastic material; the debris collection module is made of elastic material.

[0017] The utility model also provides an additive manufacturing device, which includes a controller, a sensor and a multifunctional scraper mechanism as described in any of the above items. When the controller receives detection information sent by the sensor that warping occurs in the sintering area, it controls the support frame to stop moving and retreat, the scraper seat moves upward, and the mounting seat moves downward to the current layer thickness position. The ultrasonic knife and the residual chip collection module move along the length direction of the mounting seat under the drive of the left and right driving modules to remove the warping in the sintering area and recover the residual chips.

[0018] The multifunctional scraper mechanism and additive manufacturing equipment of the utility model, by adopting the above technical scheme, have the following beneficial technical effects:

[0019] 1. Using ultrasonic knife to suppress the warping phenomenon in the sintering area during additive manufacturing can reduce the damage of the scraper during the printing process, reduce the downtime during the printing process, and reduce the manual participation in the printing process;

[0020] 2. The scraper assembly is formed by integrating the warpage removal assembly and the scraper assembly, so that the present application only needs to add the warpage removal assembly on the basis of the existing scraper mechanism, so that the scraper can not only realize the powder spreading function of the scraper, but also has the function of removing the warped parts of the sintering area. The overall structure is simple, the production cost is low, and it occupies a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the multifunctional scraper mechanism of the utility model;

[0022] Figure 2 for Figure 1 sectional view of .

[0023] The parts in the figure are marked as follows:

[0024] 1. Up and down driving module; 2. Support frame; 3. Mounting seat; 4. Ultrasonic knife; 5. Left and right driving module; 6. Scraper up and down driving module; 7. Scraper seat; 8. Scraper; 9. Recovery hole; 10. Residual chip collection module; 11. Recovery channel. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand and implement the technical solution of the utility model, further detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0026] Embodiment 1

[0027] like Figure 1 and Figure 2 As shown, the multifunctional scraper mechanism of this embodiment includes a support frame 2, and a scraper 8 component and a warp removal component arranged in the support frame 2, wherein:

[0028] The scraper 8 assembly includes a scraper up and down driving module 6, a scraper seat 7 and a scraper 8, wherein the scraper up and down driving module 6 is arranged in the support frame 2, the scraper seat 7 is connected to the scraper up and down driving module 6, and the scraper 8 is arranged at the bottom of the scraper seat 7 and moves up and down following the scraper seat 7 under the drive of the scraper up and down driving module 6;

[0029] The warping removal component includes a mounting seat 3, an upper and lower driving module 1, a left and right driving module 5, an ultrasonic knife 4, a residual chip collection module 10 and a plurality of recovery holes 9. The upper and lower driving module 1 is arranged in a support frame 2, and the mounting seat 3 is connected to the upper and lower driving module 1. The top of the mounting seat 3 is provided with the plurality of recovery holes 9 at intervals, and the bottom is an open structure. The ultrasonic knife 4 and the residual chip collection module 10 are slidably arranged at the bottom opening of the mounting seat 3, and under the drive of the upper and lower driving module 1, follow the mounting seat 3 to move up and down, and under the drive of the left and right driving module 5, move along the length direction of the mounting seat 3 to remove the warping of the sintering area and recover the residual chips, and the recovered residual chips are recovered through the recovery holes 9.

[0030] As a preferred solution of the utility model, the residual debris collection module 10 is an impeller mechanism and a driving mechanism, the impeller mechanism includes a plurality of impeller blades, and a recovery channel 11 is formed between adjacent impeller blades, and the driving mechanism drives the impeller mechanism to rotate to rotate the residual debris to the recovery channel 11. The residual debris collection module 10 of this structure can better recover the residual debris. Of course, in the specific implementation, the residual debris collection module 10 can also be other specific structures, and its specific structure is not limited in this application.

[0031] In a specific implementation, the scraper mechanism also includes a recovery box, a vacuum mechanism and a pipeline. The recovery box is connected to a plurality of recovery holes 9 through the pipeline. The vacuum mechanism vacuums the recovery box so that the residual chips in the recovery channel 11 are sucked into the recovery box through the plurality of recovery holes 9.

[0032] Specifically, the ultrasonic knife 4 is disposed adjacent to the residual debris collection module 10 and is relatively stationary, so that the residual debris can be recovered by the residual debris collection module 10. Specifically, a surface of the ultrasonic knife 4 close to the impeller mechanism is arc-shaped, and during the rotation of the impeller mechanism, the arc-shaped surface of the ultrasonic knife 4 and a part of the impeller blades of the impeller mechanism (for example, the impeller blades close to the bottom of the impeller mechanism) are in interference fit.

[0033] In order to make the structural layout of the scraper mechanism more compact and the overall structure occupy a smaller space, the scraper seat 7 and the mounting seat 3 are arranged in parallel.

[0034] In another specific implementation, the scraper up and down drive module 6 is connected to the scraper seat 7 through a plurality of first telescopic rods, and the up and down drive module 1 is connected to the mounting seat 3 through a plurality of second telescopic rods. Of course, in a specific implementation, the scraper up and down drive module 6 and the up and down drive module 1 can also drive the scraper seat 7 and the mounting seat 3 up and down through a screw rod, a transmission mechanism, etc., and no limitation is made to their specific structures. It should be noted that the scraper up and down drive module 6, the up and down drive module 1, the left and right drive module 5 and the drive mechanism of the present application can be driven electrically, hydraulically or pneumatically, and no limitation is made in the present application. Moreover, since this belongs to the common knowledge in the art, no detailed elaboration is made on their specific structures.

[0035] Preferably, the plurality of recovery holes 9 are equidistantly distributed along the length direction of the mounting seat 3, so that the residual chips can more completely enter the recovery holes 9 through the recovery channel 11, that is, the recovery effect is better.

[0036] In a specific implementation, the scraper 8 is made of elastic material; the debris collection module 10 is made of elastic material.

[0037] When the additive manufacturing equipment is printing normally, the scraper 8 assembly works, and the scraper 8 adheres to the powder surface to spread the powder to the sintering area; at this time, the warping removal assembly does not work and remains on the upper side of the powder surface, and when warping occurs in the sintering area, the ultrasonic knife 4 adheres to the powder surface to remove the warped area, and the scraper 8 remains on the upper side of the powder surface.

[0038] When the warped part is removed by the ultrasonic knife 4, residual chips will be generated, and the residual chips will be recovered by the residual chips collection module 10. When the residual chips enter the residual chips collection module 10, they will first pass through the recovery channel 11 and be temporarily stored in the residual chips collection module 10. When the residual chips collection module 10 is rotated to a certain angle, the residual chips can be recovered to the recovery box through the recovery hole 9.

[0039] Embodiment 2

[0040] The additive manufacturing equipment of this embodiment includes a controller, a sensor and a multifunctional scraper mechanism as described in any of the above embodiments, wherein the sensor is used to detect the surface of the sintering area in real time, and when the sintering area is detected to be warped, the detection information is sent to the controller, and when the controller receives the detection information of the warping of the sintering area sent by the sensor, the support frame 2 is controlled to stop moving and retreat (for example, retreat 1-2mm), the scraper seat 7 moves upward, the mounting seat 3 moves downward to the current layer thickness position, and the ultrasonic knife 8 and the residual chip collection module 10 are driven by the left and right driving modules 5 along the length direction of the mounting seat 3 to remove the warping of the sintering area and recycle the residual chips. Specifically, the ultrasonic knife 4 and the residual chip collection module 10 start and move to the other end, and return to the starting position after moving to the end, the ultrasonic knife 4 and the residual chip collection module 10 stop moving and retreat, and rise a certain distance, the scraper 8 drops to the current layer thickness position, and the support frame 2 continues to spread powder forward for printing.

[0041] It should be noted that the additive manufacturing device of the present application also includes a driving device, which is used to drive the multifunctional scraper mechanism of the present application to move in the working area to spread the powder to the working area for sintering. Since the driving device belongs to the prior art of additive manufacturing equipment, its specific structure is not specifically described in this application.

[0042] The above embodiments are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. It should be pointed out that some modifications and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A multifunctional scraper mechanism, characterized in that: It includes a support frame, and a scraper assembly and a warp removal assembly arranged in the support frame, wherein: The scraper assembly comprises a scraper up and down driving module, a scraper seat and a scraper, wherein the scraper up and down driving module is arranged in the support frame, the scraper seat is connected to the scraper up and down driving module, and the scraper is arranged at the bottom of the scraper seat and moves up and down following the scraper seat under the drive of the scraper up and down driving module; The warp removal component includes a mounting seat, an upper and lower driving module, a left and right driving module, an ultrasonic knife, a residual chip collection module and a plurality of recovery holes. The upper and lower driving module is arranged in a support frame, and the mounting seat is connected to the upper and lower driving modules. The top of the mounting seat is provided with the plurality of recovery holes at intervals, and the bottom is an open structure. The ultrasonic knife and the residual chip collection module are slidably arranged at the bottom opening of the mounting seat, and under the drive of the upper and lower driving modules, they follow the mounting seat to move up and down, and under the drive of the left and right driving modules, they move along the length direction of the mounting seat to remove the warping of the sintering area and recover the residual chips, and the recovered residual chips are recovered through the recovery holes.

2. The multifunctional scraper mechanism according to claim 1, characterized in that: The residual debris collection module is an impeller mechanism and a driving mechanism. The impeller mechanism includes a plurality of impeller blades. A recovery channel is formed between adjacent impeller blades. The driving mechanism drives the impeller mechanism to rotate to rotate the residual debris to the recovery channel.

3. The multifunctional scraper mechanism according to claim 2, characterized in that: The scraper mechanism also includes a recovery box, a vacuuming mechanism and a pipeline. The recovery box is connected to a plurality of recovery holes through the pipeline. The vacuuming mechanism vacuums the recovery box so that the residual chips in the recovery channel are sucked into the recovery box through the plurality of recovery holes.

4. The multifunctional scraper mechanism according to claim 3, characterized in that: The ultrasonic knife is arranged adjacent to the impeller mechanism and is relatively stationary, so that the residual chips can be recovered by the residual chip collection module.

5. The multifunctional scraper mechanism according to claim 4, characterized in that: A surface of the ultrasonic knife close to the impeller mechanism is arc-shaped, and during the rotation of the impeller mechanism, the arc-shaped surface of the ultrasonic knife and part of the impeller blades of the impeller mechanism are in interference fit.

6. The multifunctional scraper mechanism according to claim 1, characterized in that: The scraper seat and the mounting seat are arranged in parallel.

7. The multifunctional scraper mechanism according to claim 1, characterized in that: The scraper up and down driving module is connected to the scraper seat through a plurality of first telescopic rods, and the up and down driving module is connected to the mounting seat through a plurality of second telescopic rods.

8. The multifunctional scraper mechanism according to claim 1, characterized in that: The plurality of recovery holes are evenly distributed along the length direction of the mounting seat.

9. The multifunctional scraper mechanism according to any one of claims 1 to 8, characterized in that: The scraper is made of elastic material; the debris collection module is made of elastic material.

10. An additive manufacturing device, characterized in that: It comprises a controller, a sensor and a multifunctional scraper mechanism as described in any one of claims 1 to 9. When the controller receives detection information of warping in the sintering area sent by the sensor, it controls the support frame to stop moving and retreat, the scraper seat moves upward, and the mounting seat moves downward to the current layer thickness position. The ultrasonic knife and the residual chip collection module move along the length direction of the mounting seat under the drive of the left and right driving modules to remove the warping in the sintering area and recover the residual chips.

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