Unwinding mechanism and device for additive manufacturing

Abstract

The utility model belongs to the technical field of additive manufacturing, and particularly relates to an unwinding mechanism and device for additive manufacturing, the unwinding mechanism comprises a base plate, the base plate is provided with an unwinding roller and a guide block, the unwinding roller is used for unwinding a thin material, and the guide block is used for conveying the thin material to an additive processing position; the conveying assembly is arranged between the unwinding roller and the guide block and is used for conveying the thin material from the unwinding roller to the guide block; the cutting assembly is arranged right opposite to the guide block and used for cutting the thin materials output along the guide block. According to the utility model, the thin material conveying precision can be controlled, the thin material conveyed to the additive machining station can be kept to meet the ultrasonic welding requirement, the additive precision and quality are improved, the thin material and the substrate are welded and formed through the ultrasonic welding assembly, the dimensional precision and the surface roughness of the substrate are ensured, the molded surfaces of complex parts can be conveniently machined, and the production efficiency is improved. The part machining performance is improved.

Description

Technical Field

[0001] This utility model belongs to the field of additive manufacturing technology, specifically relating to an unwinding mechanism and device for additive manufacturing. Background Technology

[0002] Additive manufacturing technology is used to form three-dimensional solid parts by orderly accumulation or stacking of materials, so as to realize the integrated processing and molding of complex parts such as irregular shapes. Additive manufacturing technology has been widely used in industrial fields such as automobile manufacturing and aerospace.

[0003] Because complex parts have high dimensional accuracy, surface roughness, and high performance requirements, it is difficult to machine the surface of complex parts using traditional machining methods, which also wastes raw materials. The performance of parts cast by casting is lower than that of forgings.

[0004] Currently, additive manufacturing using ultrasonic welding technology is widely used, achieving not only pollution-free and damage-free production but also high forming precision. However, existing ultrasonic welding methods require real-time feeding of the thin material into the ultrasonic welding equipment. Since the thin material needs to be controlled to circulate back and forth on the substrate during additive manufacturing, maintaining the feeding precision of the thin material is difficult.

[0005] Therefore, it is necessary to improve the existing technology to overcome its shortcomings in practical applications. Utility Model Content

[0006] Based on the aforementioned shortcomings and deficiencies in the prior art, one of the objectives of this utility model is to at least solve one or more of the aforementioned problems in the prior art. In other words, one of the objectives of this utility model is to provide an unwinding mechanism and device for additive manufacturing that meets one or more of the aforementioned requirements.

[0007] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0008] This utility model provides an unwinding mechanism for additive manufacturing, comprising:

[0009] A substrate, wherein an unwinding roller and a guide block are mounted on the substrate, the unwinding roller being used to unwind a thin material, and the guide block being used to transport the thin material to an additive processing station;

[0010] A conveying assembly, disposed between the unwinding roller and the guide block, is used to convey the thin material from the unwinding roller to the guide block; and

[0011] A cutting component is arranged opposite to the guide block and is used to cut the thin material output along the guide block.

[0012] As a preferred embodiment, the conveying assembly includes a first driving unit, a second driving unit, a drive roller, and a pressure roller. The pressure roller is arranged opposite to the drive roller. The first driving unit is drivenly connected to the drive roller, and the second driving unit is drivenly connected to the pressure roller, so that the pressure roller presses the thin material against the drive roller.

[0013] As a preferred embodiment, the first drive unit is mounted on the substrate, and the output end of the first drive unit is connected to the drive roller via a synchronous belt drive.

[0014] As a preferred embodiment, the base plate is connected to a fixing seat and a guide rail. The second driving unit is installed on the fixing seat, and the pressure roller is slidably engaged with the guide rail. The second driving unit drives the pressure roller to move up and down along the guide rail.

[0015] As a preferred embodiment, the cutting assembly includes a cylinder, a sliding block, and a cutting blade, wherein the cutting blade is disposed on the sliding block, and the sliding block is throttle-connected to the cylinder.

[0016] As a preferred embodiment, the substrate is provided with a slide rail, and the sliding block slides in cooperation with the slide rail.

[0017] As a preferred embodiment, the guide block has a conveying groove along which the thin material moves.

[0018] As a preferred embodiment, a photoelectric sensor is mounted on the substrate, and the photoelectric sensor is positioned facing the output end of the unwinding roller.

[0019] As a preferred embodiment, several tension rollers are mounted on the substrate, and the thin material moves sequentially along the tension rollers.

[0020] This utility model also provides an additive manufacturing apparatus, including an ultrasonic welding assembly and an unwinding mechanism as described in any of the above embodiments, wherein the ultrasonic welding assembly is used to perform ultrasonic welding on the thin material conveyed by the unwinding mechanism to the additive processing station.

[0021] Compared with the prior art, the advantages of this utility model are:

[0022] This invention provides an unwinding mechanism for additive manufacturing, which can control the conveying accuracy of thin material, ensure that the thin material conveyed to the additive processing position meets the requirements of ultrasonic welding, improve the accuracy and quality of additive manufacturing, and weld the thin material to the substrate through the ultrasonic welding assembly to ensure the dimensional accuracy and surface roughness of the substrate, so as to facilitate the processing of complex parts, save processing raw materials, and improve the processing performance of parts. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a perspective view of an unwinding mechanism for additive manufacturing according to an embodiment of the present invention;

[0025] Figure 2 This is a front view of an unwinding mechanism for additive manufacturing according to an embodiment of the present invention;

[0026] Figure 3 This is a side view of an unwinding mechanism for additive manufacturing according to an embodiment of the present invention;

[0027] In the figure: 1 substrate, 11 fixed base, 12 guide rail, 13 photoelectric sensor, 14 tensioning roller, 15 unwinding roller, 151 magnetic powder brake, 16 guide block, 2 conveying assembly, 21 first drive unit, 22 second drive unit, 23 drive roller, 24 pressure roller, 25 synchronous belt, 3 cutting assembly, 31 cylinder, 32 sliding block, 33 cutting blade, 34 slide rail, 4 thin material. Detailed Implementation

[0028] To more clearly illustrate the embodiments of this utility model, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0029] In the description of the embodiments of this utility model, the terms "upper," "lower," "front," "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used for distinction in description and have no special meaning.

[0030] like Figures 1 to 3 As shown, this embodiment provides an unwinding mechanism for additive manufacturing, including a substrate 1, a conveying assembly 2 and a cutting assembly 3. An unwinding roller 15 and a guide block are mounted on the substrate 1. The unwinding roller 15 is used to unwind thin material, and the guide block 16 is used to convey the thin material 4 to the additive processing station for processing and shaping.

[0031] Specifically, the conveying assembly 2 is located between the unwinding roller 15 and the guide block 16, and is used to convey the thin material 4 from the unwinding roller 15 to the guide block 16. The conveying assembly 2 includes a first drive unit 21, a second drive unit 22, a drive roller 23 and a pressure roller 24. The pressure roller 24 and the drive roller 23 are arranged opposite each other. The first drive unit 21 is drivenly connected to the drive roller 23, and the second drive unit 22 is drivenly connected to the pressure roller 24, so that the pressure roller 24 presses the thin material against the drive roller 23.

[0032] Furthermore, the first drive unit 21 is mounted on the substrate 1. The output end of the first drive unit 21 is connected to the drive roller 23 via a synchronous belt 25. In order to output a stable driving force and ensure the stability of the drive roller 23 in conveying the thin material 4, the first drive unit 21 adopts a servo motor. The servo motor is connected to the drive roller 23 via a synchronous belt and is used to drive the drive roller 23 to rotate. This ensures that the drive roller 23 and the pressure roller 24 cooperate to convey the thin material, which is beneficial to improving the conveying quality and control accuracy.

[0033] It should be noted that the first drive unit 21 is not limited to a servo motor, but can also be an electric cylinder or a hydraulic cylinder, which is beneficial to save on usage costs. The specific configuration can be made according to actual needs and is not limited to the limitations of this embodiment.

[0034] Furthermore, the unwinding roller 15 is equipped with a magnetic powder brake 151, which controls the start and stop of the unwinding roller 15 to ensure the orderly output of the thin material 4 in the unwinding roller 15 and the stable tension on the surface of the thin material 4, thereby avoiding slippage between the thin material 4 and the unwinding roller 15. At the same time, the speed fluctuation of the unwinding roller 15 can be controlled within a small range, so that the output speed and tension of the thin material 4 can be stable and orderly.

[0035] Furthermore, the base plate 1 connects the fixing seat 11 and the guide rail 12. The fixing seat 11 is equipped with a second drive unit 22. The two ends of the pressure roller 24 are connected to the guide rail 12 via sliders, and the pressure roller 24 is driven to move up and down along the guide rail 12 by the second drive unit 22. The second drive unit 22 is a cylinder, and the output end of the cylinder is connected to the slider for transmission, so that the slider moves up and down in conjunction with the pressure roller. Using a cylinder can save costs.

[0036] It should be noted that the second drive unit 22 is not limited to a cylinder, but can also be a direct drive motor, which can better control the positional movement accuracy of the pressure roller 24 when pressing the drive roller 23.

[0037] Since the pressure roller 24 is located directly above the drive roller 23, the pressure roller 24 is driven to move up and down by the second drive unit 22 and to contact and cooperate with the drive roller 23. The pressure roller 24 can press the thin material 4 onto the drive roller 23 to ensure the surface flatness of the thin material.

[0038] In actual operation, the pressure roller 24 is driven to move in the up and down direction by the second drive unit 22 and presses the thin material 4 onto the drive roller 23. The drive roller 23 is driven to rotate by the first drive unit 21. The movement of the thin material is driven by the friction between the drive roller 23 and the thin material 4, and the pressure roller rotates passively as the thin material 4 moves.

[0039] In this embodiment, the cutting component 3 is arranged opposite to the guide block 16 and is used to cut the thin material output along the guide block 16. The cutting component 3 includes a cylinder 31, a sliding block 32 and a cutting blade 33. The cutting blade 33 is disposed on the sliding block 32 and the sliding block 32 is connected to the cylinder 31 in a driving connection.

[0040] Furthermore, the cylinder 31 is fixed to the base plate 1, and the output end of the cylinder 31 is connected to the sliding block 34. The base plate 1 is provided with a slide rail 34, and the sliding block 32 is slidably engaged with the slide rail 34. The cutting blade 33 is fixed on the sliding block. When the cylinder 31 drives the sliding block 32 to move up and down along the slide rail, the cutting blade 33 moves up and down along the side wall of the guide block 16 in conjunction with the cylinder 31, so as to cut the thin material output along the guide block 16.

[0041] Furthermore, the guide block 16 has a conveying groove 161, the thin material 4 moves along the conveying groove 161, the conveying groove 161 has a certain curvature, and the output end of the conveying groove 161 is arranged in a horizontal direction, which can ensure that the thin material can be flush with the substrate to be added when it is output.

[0042] A photoelectric sensor 13 is mounted on the substrate 1, and the photoelectric sensor 13 is positioned directly opposite the output end of the unwinding roller 15. The photoelectric sensor 13 is used to detect whether the thin material 4 is being transported normally, so as to ensure the normal operation of the additive manufacturing process.

[0043] Several tensioning rollers 14 are installed on the substrate 1, and the thin material 4 moves sequentially along the tensioning rollers 14. Specifically, the thin material 4 is output from the unwinding roller 15 and is rolled by the tensioning rollers 14 in sequence. On the one hand, this can ensure the surface tension of the thin material, making the thin material flat during the conveying process and avoiding wrinkles in the thin material entering the additive processing position. On the other hand, the multiple tensioning rollers can play a positioning and guiding role for the thin material. The thin material is sequentially and orderly conveyed into the guide block and enters the additive processing position through the linkage of the active roller.

[0044] The specific usage process of the unwinding mechanism for additive manufacturing provided in this embodiment is as follows:

[0045] First, the thin material is output from the unwinding roller and passes sequentially through the tension roller and the drive roller, flowing through the guide block to the additive manufacturing station. Before conveying the thin material, the magnetic powder brake is released to release the thin material in the unwinding roller. Next, the cylinder of the second drive unit drives the pressure roller to press down, and the servo motor of the first drive unit drives the drive roller to rotate via a synchronous belt. The friction between the drive roller and the pressure roller drives the thin material to move. When the thin material moves to a certain position, the servo motor stops running, and the magnetic powder brake is engaged to stop the unwinding of the thin material. Finally, the cylinder of the cutting component drives the cutting blade to move downward to cut the thin material. The cutting blade returns to its original position, and the process is repeated to continuously add thin material layer by layer to the substrate, thereby achieving the purpose of additive manufacturing.

[0046] This embodiment also provides an additive manufacturing apparatus, including an ultrasonic welding assembly (not shown in the figure) and an unwinding mechanism as described above. The ultrasonic welding assembly is used to perform ultrasonic welding on the thin material conveyed by the unwinding mechanism to the additive processing station.

[0047] Specifically, the ultrasonic welding assembly mainly includes an ultrasonic generator, a transducer, an amplitude modulator, and a welding head. The ultrasonic generator converts low-frequency alternating current into high-frequency current, and the transducer converts the high-frequency current into mechanical motion. Subsequently, the mechanical motion changes the amplitude through the amplitude modulator and is transmitted to the welding head. The welding head transmits the received vibration energy to the joint between the thin material and the substrate. Under pressure, the surfaces of the thin material and the substrate rub against each other, generating heat and forming fusion between molecular layers. After the thin material is transported to the additive processing position by the unwinding mechanism, the ultrasonic welding assembly welds the thin material and the substrate together to form the final shape.

[0048] The above description is only a detailed explanation of the preferred embodiments and principles of this utility model. For those skilled in the art, there may be changes in the specific implementation methods based on the ideas provided by this utility model, and these changes should also be considered within the protection scope of this utility model.

Claims

1. An unwinding mechanism for additive manufacturing, characterized in that, include: A substrate, wherein an unwinding roller and a guide block are mounted on the substrate, the unwinding roller being used to unwind a thin material, and the guide block being used to transport the thin material to an additive processing station; A conveying assembly, disposed between the unwinding roller and the guide block, is used to convey thin material from the unwinding roller to the guide block; as well as A cutting component is arranged opposite to the guide block and is used to cut the thin material output along the guide block.

2. The unwinding mechanism for additive manufacturing according to claim 1, characterized in that, The conveying assembly includes a first drive unit, a second drive unit, a drive roller, and a pressure roller. The pressure roller is arranged opposite to the drive roller. The first drive unit is drivenly connected to the drive roller, and the second drive unit is drivenly connected to the pressure roller, so that the pressure roller presses the thin material against the drive roller.

3. The unwinding mechanism for additive manufacturing according to claim 2, characterized in that, The first drive unit is mounted on the substrate, and the output end of the first drive unit is connected to the drive roller via a synchronous belt.

4. The unwinding mechanism for additive manufacturing according to claim 2, characterized in that, The base plate is connected to a fixing seat and a guide rail. The second driving part is installed on the fixing seat. The pressure roller is slidably engaged with the guide rail. The second driving part drives the pressure roller to move up and down along the guide rail.

5. The unwinding mechanism for additive manufacturing according to claim 1, characterized in that, The cutting assembly includes a cylinder, a sliding block, and a cutting blade. The cutting blade is disposed on the sliding block, and the sliding block is throttle-connected to the cylinder.

6. The unwinding mechanism for additive manufacturing according to claim 5, characterized in that, The substrate is provided with a slide rail, and the sliding block slides in cooperation with the slide rail.

7. The unwinding mechanism for additive manufacturing according to claim 1, characterized in that, The guide block has a conveying groove, along which the thin material moves.

8. The unwinding mechanism for additive manufacturing according to claim 1, characterized in that, A photoelectric sensor is mounted on the substrate, and the photoelectric sensor is positioned facing the output end of the unwinding roller.

9. The unwinding mechanism for additive manufacturing according to claim 1, characterized in that, Several tension rollers are mounted on the substrate, and the thin material moves sequentially along the tension rollers.

10. An apparatus for additive manufacturing, characterized in that, The invention includes an ultrasonic welding assembly and an unwinding mechanism as described in any one of claims 1 to 9, wherein the ultrasonic welding assembly is used to perform ultrasonic welding on a thin material conveyed by the unwinding mechanism to an additive processing station.

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