Disassembly-free wind field detection device and additive manufacturing equipment

Abstract

A dismounting-free wind field detection device and additive manufacturing equipment wherein the dismounting-free wind field detection device comprises a chassis, a turnover plate, a wind speed detection instrument, a lifting assembly and a plurality of omnidirectional wheels, the plurality of omnidirectional wheels are rotatably mounted at the bottom of the chassis, one side of the turnover plate is mounted on the chassis through a hinge, and the other side of the turnover plate is mounted on the chassis through a hinge. The lifting assembly is installed on the turnover plate, and the wind speed detection instrument is installed on the lifting assembly and can move up and down under the action of the lifting assembly. The dismounting-free wind field detection device is small in size, does not need to be dismounted, can be stored in the working cavity through the folding turnover plate after being used, and does not affect printing work; tedious operation of disassembly and assembly is avoided, operation difficulties caused by various large-size devices can be adapted, and preparation work time and gas consumption cost wasted by repeated inflation are saved. According to the utility model, on the premise that complete wind field data is detected, one detection device can carry out wind field detection on a plurality of additive manufacturing devices, so that the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of additive manufacturing, and specifically relates to a disassembly-free wind field detection device for a circulating filtering air path and additive manufacturing equipment. Background Art

[0002] During the metal 3D printing process, laser scanning of metal powder generates a large amount of smoke and ash, so a wind field is needed to remove the smoke and ash. However, the higher the wind speed, the better. Excessive wind speed will cause the metal powder to be blown away by the wind during actual printing. Excessive wind speed will cause powder, slag, and smoke to fall on the powder surface or contaminate the optical lens, affecting the printing quality. In addition, poor wind field uniformity will form wind field turbulence, which will also affect the printing quality. Therefore, the size and uniformity of the wind speed are related to the quality of the wind field, and also directly affect the quality of the printed part. However, the measurement of the wind field is difficult and there are many interference factors. As the molding size of metal additive manufacturing equipment becomes larger and larger, the wind field measurement range also increases. Due to the limitations of the mechanical structure of the cavity and the actual printing state, the measurement of wind field data becomes more difficult.

[0003] At present, wind field measurements of metal 3D printing equipment mostly use the method of manually moving the anemometer position or installing measuring fixtures for detection. Although these two methods can complete wind field measurements in some simple occasions, they also bring many limitations. First of all, the manual measurement method is not suitable for large-scale equipment. It is very labor-intensive and time-consuming, and it cannot measure wind fields on multiple levels. The installation of measuring fixtures requires a large space due to their large size. Most additive manufacturing equipment needs to take into account the wind field range, and the air inlet and outlet grids on both sides have a large coverage area, and basically no space is reserved for installing fixtures. Forced installation can easily cause damage to the air outlet, resulting in changes in the wind field. In addition, the removal of the measuring fixture requires opening the working chamber door, resulting in the need for a second oxygen reduction operation, which affects work efficiency, and there is a risk of hypoxia when a person enters the cavity. Utility Model Content

[0004] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides a disassembly-free wind field detection device and additive manufacturing equipment. The disassembly-free wind field detection device is small in size and does not need to be disassembled. After use, it can be placed in the working chamber for storage through a folding flip plate without affecting the printing work; it avoids the tedious operation of disassembly and assembly, and can adapt to the operational difficulties brought by various large-size equipment, which saves the preparation time and gas costs wasted by repeated inflation.

[0005] To achieve the above-mentioned purpose, the utility model provides a non-disassembly type wind field detection device, which includes a chassis, a flip plate, a wind speed detection instrument, a lifting assembly, and a plurality of omnidirectional wheels. The plurality of omnidirectional wheels are rotatably mounted on the bottom of the chassis, one side of the flip plate is mounted on the chassis through a hinge, the lifting assembly is mounted on the flip plate, and the wind speed detection instrument is mounted on the lifting assembly and can move up and down under the action of the lifting assembly.

[0006] As a further preferred solution of the present invention, a plurality of locking blocks are further provided on the chassis for locking the other side of the flip plate when the non-disassembly type wind field detection device is in working state.

[0007] As a further preferred embodiment of the present invention, the lifting assembly includes a threaded screw, a lifting motor and a limit plate. A first through hole is provided on the chassis. The lifting motor is fixedly installed below the flip plate and is embedded in the first through hole when the disassembly-free wind field detection device is in working state. One end of the screw is connected to the lifting motor through a coupling, and the other end of the screw is fixedly connected to the limit plate. A nut is rotatably connected to the screw, and a support plate is fixedly installed on the nut. The wind speed detection instrument is arranged on the support plate to drive the screw to rotate by the lifting motor, and drive the support plate and the wind speed detection instrument to move up and down under the conversion action of the nut.

[0008] As a further preferred solution of the present invention, the wind speed detection instrument is an anemometer, and the anemometer is installed vertically or inverted on the support plate.

[0009] As a further preferred embodiment of the present invention, the lifting assembly also includes two guide rods, one end of which is arranged on the flip plate and symmetrically located on both sides of the screw rod, and the other end passes through the support plate and is fixedly connected to the limit plate, so that the support plate and the wind speed detection instrument can move up and down under the guidance of the guide rods.

[0010] As a further preferred embodiment of the present invention, the disassembly-free wind field detection device also includes a plurality of drive motors, and the disassembly-free wind field detection device also includes a plurality of L-shaped connecting plates, one vertical plate of each L-shaped connecting plate is installed at the bottom of the chassis, and the other vertical plate is used to fix the plurality of drive motors and is provided with a second through hole for placing the bearing, the rotating shaft of the drive motor is interference fit with the inner diameter of the bearing, the rotating shaft passes through the inner diameter of the bearing and is connected to the flange, and the flange is fixedly connected to the omnidirectional wheel.

[0011] As a further preferred solution of the present invention, there are four omnidirectional wheels, which are respectively arranged at the four corners of the chassis.

[0012] The present utility model also provides an additive manufacturing device, which includes a working chamber and any one of the above-mentioned non-disassembly type wind field detection devices, wherein the non-disassembly type wind field detection device is located in the working chamber.

[0013] As a further preferred embodiment of the present invention, the additive manufacturing equipment further includes a storage box, which is arranged on the side wall of the working chamber and above the scraper assembly; or is arranged in the area between the scraper movement limit position of the scraper assembly and the chamber door, and the disassembly-free wind field detection device is stored in the storage box by folding the flip plate in the non-working state.

[0014] The utility model discloses a non-disassembly type wind field detection device and additive manufacturing equipment, wherein the non-disassembly type wind field detection device includes a chassis, a flip plate, a wind speed detection instrument, a lifting assembly, and a plurality of omnidirectional wheels, wherein the plurality of omnidirectional wheels are rotatably mounted on the bottom of the chassis, one side of the flip plate is mounted on the chassis via a hinge, the lifting assembly is mounted on the flip plate, the wind speed detection instrument is mounted on the lifting assembly, and can move up and down under the action of the lifting assembly, so that the non-disassembly type wind field detection device of the utility model is small in size and does not need to be disassembled. After use, it can be placed in the working chamber by folding the flip plate for storage, without affecting the printing work; and it avoids the tedious operation of disassembly and assembly, and can adapt to the operational difficulties brought by various large-scale equipment, that is, it optimizes the operation process and saves the preparation time and gas cost wasted by repeated inflation. In addition, the utility model can ensure that under the premise of detecting complete wind field data, a detection device can be used to detect the wind field of multiple additive manufacturing equipment, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the working state structure of an embodiment of the non-disassembly type wind field detection device provided by the utility model;

[0016] Figure 2 A schematic diagram of the non-working state structure of an embodiment of the non-disassembly-type wind field detection device provided by the utility model;

[0017] Figure 3 A motion trajectory diagram of an embodiment of the non-disassembly-type wind field detection device provided by the utility model;

[0018] Figure 4 A schematic structural diagram of an embodiment of the additive manufacturing equipment provided by the present utility model;

[0019] Figure 5 for Figure 4 A magnified schematic diagram of the local structure.

[0020] The components in the figure are marked as follows:

[0021] 1. Base plate, 2. Cavity plate, 3. Wind field, 4. Starting point, 5. Chassis, 6. Flip plate, 7. Screw, 8. Nut, 9. Support plate, 10. Limit plate, 11. Guide rod, 12. Anemometer, 13. Locking block, 14. L-shaped connecting plate, 15. Omnidirectional wheel, 16. Drive motor, 17. Lifting motor, 18. Flange, 19. Suction port, 20. Working chamber, 21. Blowing port, 22. Scraper assembly, 23. Storage box. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the following will be further described in detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, the non-disassembly wind field detection device of this embodiment includes a chassis 5, a flip plate 6, a wind speed detection instrument, a lifting assembly, and a plurality of omnidirectional wheels 15. The plurality of omnidirectional wheels 15 are rotatably mounted on the bottom of the chassis 5, one side of the flip plate 6 is mounted on the chassis 5 through a hinge, the lifting assembly is mounted on the flip plate 6, and the wind speed detection instrument is mounted on the lifting assembly and can move up and down under the action of the lifting assembly.

[0024] The chassis 5 is also provided with a plurality of locking blocks 13 for locking the other side of the flip plate 6 when the non-disassembly type wind field detection device is in working state. Figure 1 When the non-disassembly type wind field detection device is in a non-working state, the locking block 13 of the flip plate 6 is unlocked, and the entire non-disassembly type wind field detection device is folded by flipping the flip plate 6, thereby reducing the space occupied by the working cavity 20, such as Figure 2 In a specific implementation, the number of the locking blocks 13 is two.

[0025] Further reading Figure 1 The lifting assembly includes a threaded screw 7, a lifting motor 17 and a limit plate 10. A first through hole is opened on the chassis 5. The lifting motor 17 is fixedly installed below the flip plate 6 and is embedded in the first through hole when the non-disassembly wind field detection device is in working state. One end of the screw rod 7 is connected to the lifting motor 17 through a coupling, and the other end of the screw rod 7 is fixedly connected to the limit plate 10. A nut 8 is rotatably connected to the screw rod 7, and a support plate 9 is fixedly mounted on the nut 8. The wind speed detection instrument is arranged on the support plate 9 to drive the screw rod 7 to rotate by the lifting motor 17, and drive the support plate 9 and the wind speed detection instrument to move up and down under the conversion action of the nut 8.

[0026] In a specific implementation, the wind speed detection instrument is an anemometer 12, which is installed vertically or inverted on the support plate 9. Although the current additive manufacturing equipment has become larger and larger in size, the height of the working chamber 20 has not increased significantly. Preferably, the anemometer 12 can be installed in both vertical and guided ways to increase the Z direction range (for example, first install it vertically and then guide it, or first install it inverted and then install it vertically. The combination of the two can obtain a wider Z direction range). Figure 1 shown.

[0027] In order to make the anemometer 12 rise or fall more smoothly, the lifting assembly also includes two guide rods 11, one end of the two guide rods 11 is set on the flip plate 6 and is symmetrically located on both sides of the screw rod 7, and the other end passes through the support plate and is fixedly connected to the limit plate, so that the support plate 9 and the wind speed detection instrument move up and down under the guidance of the guide rods 11.

[0028] The lifting assembly further includes two guide rods 11 , one end of which is provided on the flip plate 6 and symmetrically located on both sides of the screw rod 7 , and the other end of which is fixedly connected to the limit plate 10 .

[0029] In a specific implementation, the non-disassembly type wind field detection device also includes a plurality of drive motors 16, and the non-disassembly type wind field detection device also includes a plurality of L-shaped connecting plates 14. A vertical plate of each L-shaped connecting plate 14 is installed at the bottom of the chassis 5, and the other vertical plate is used to fix the plurality of drive motors 16 and is provided with a second through hole for placing the bearing. The rotating shaft of the drive motor 16 is interference fit with the inner diameter of the bearing, and the rotating shaft passes through the inner diameter of the bearing and is connected to the flange 18. The flange 18 is fixedly connected to the omnidirectional wheel 15.

[0030] Specifically, there are four omnidirectional wheels 15 , which are respectively arranged at the four corners of the chassis 5 , and the nuts 8 are T-shaped nuts 8 .

[0031] like Figure 4 As shown, the present invention also provides an additive manufacturing device, which includes a working chamber 20 and a disassembly-free wind field detection device as described in any of the above embodiments, and the disassembly-free wind field detection device is located in the working chamber 20. In order to avoid the tedious disassembly and assembly of the wind field detection device without affecting the normal operation of the additive manufacturing device, preferably, the additive manufacturing device also includes a storage box 23, which is arranged on the side wall of the working chamber 20 and is located above the scraper assembly 22; or is arranged in the area between the scraper movement limit position of the scraper assembly 22 and the chamber door. The disassembly-free wind field detection device is stored in the storage box 23 by folding the flip plate 6 in the non-working state, as shown in FIG. Figure 4 and Figure 5 shown.

[0032] It should be noted here that the additive manufacturing equipment of the present application also includes components such as the air suction port 19, the air blowing port 21, the working chamber 20, and the scanning system. Since the protection core of the present application is the non-disassembly wind field detection device, the other existing components contained in the additive manufacturing equipment of the present application will not be described in detail.

[0033] The working process of the additive manufacturing equipment of this utility model is as follows:

[0034] The non-disassembly type wind field detection device of this embodiment uses the simulation of the actual printing wind field 3 to collect wind field 3 data. The height of the substrate 1 is adjusted to be basically consistent with the cavity plate 2, simulating the actual printing height of the substrate 1 during the sintering state. In this state, the cavity door is opened, the anemometer 12 is opened and installed in the wind field detection device, and is placed at a corner position of the matrix collection point on the substrate 1, such as Figure 3 The starting point 4 is located. Then, the additive manufacturing equipment is inflated to reduce the oxygen content to below the safe value, the fan is turned on, and the wind speed in the circulating air duct is allowed to stabilize to the set value. The wind field detection device that does not require disassembly is used for automatic collection. The wind field detection device is divided into four modules, namely, an XY direction movement module, a Z direction lifting and turning movement module, a folding module and a control module. The XY direction movement module adopts a structure of four omnidirectional wheels 15, and realizes independent movement in the X and Y directions without interfering with each other by controlling the speed and direction of four drive motors 16 (such as stepping motors). The Z direction lifting and turning movement module adopts a screw rod 7 lifting mechanism, and realizes the up and down movement of the support plate 9 by rotating the screw rod 7, thereby driving the anemometer 12 on the support plate 9 to move up and down. The folding module adopts a connecting rod mechanism to realize the flipping action, and locks the other side of the flip plate 6 on the chassis 5 through the locking block 13. It can be used for wind field 3 measurement. It can be folded by loosening the locking block 13, which is convenient for placing the storage box 23 for storage. The control module has manual and automatic modes. The detection device receives commands via the WiFi module. "M" indicates manual mode, and "A" indicates automatic mode. In manual mode, the controller sends specific commands to control the movement of the detection device (forward, backward, left, right) and the elevation of the anemometer 12 (raise and lower). In automatic mode, the controller implements automatic control logic, automatically controlling the movement of the wind field detection device according to preset logic.

[0035] The wind field detection device of this embodiment has a compact structure, which not only avoids disassembly and assembly, but also solves the problems of time waste and cumbersome operation. After the collection is completed, the device can be folded into the storage box 23 and placed in an idle area in the working chamber 20 (such as the side wall of the working chamber 20 and the area above the scraper assembly 22; or the area between the scraper movement limit position of the scraper assembly 22 and the chamber door), and then the subsequent printing work can be started. This not only does not affect the normal printing work of the equipment, but also avoids repeated inflation time.

[0036] The above embodiments are merely preferred implementations of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention should be included in the scope of protection of the present invention. It should be noted that certain modifications and alterations that do not depart from the principles of the present invention should be considered as included in the scope of protection of the present invention.

Claims

1. A non-disassembly type wind field detection device, characterized in that: It includes a chassis, a flip plate, a wind speed detection instrument, a lifting assembly, and several omnidirectional wheels. The several omnidirectional wheels are rotatably mounted on the bottom of the chassis. One side of the flip plate is mounted on the chassis through a hinge. The lifting assembly is mounted on the flip plate. The wind speed detection instrument is mounted on the lifting assembly and can move up and down under the action of the lifting assembly.

2. The non-disassembly type wind field detection device according to claim 1, characterized in that: The chassis is further provided with a plurality of locking blocks for locking the other side of the flip plate when the non-disassembly type wind field detection device is in working state.

3. The non-disassembly type wind field detection device according to claim 2, characterized in that: The lifting assembly includes a threaded screw, a lifting motor and a limit plate. A first through hole is provided on the chassis. The lifting motor is fixedly installed below the flip plate and is embedded in the first through hole when the disassembly-free wind field detection device is in working state. One end of the screw is connected to the lifting motor through a coupling, and the other end of the screw is fixedly connected to the limit plate. A nut is rotatably connected to the screw, and a support plate is fixedly installed on the nut. The wind speed detection instrument is arranged on the support plate to drive the screw to rotate by the lifting motor, and drive the support plate and the wind speed detection instrument to move up and down under the conversion action of the nut.

4. The non-disassembly-type wind field detection device according to claim 3, characterized in that: The wind speed detection instrument is an anemometer, which is installed vertically or inverted on the support plate.

5. The non-disassembly type wind field detection device according to claim 3, characterized in that: The lifting assembly also includes two guide rods, one end of which is arranged on the flip plate and symmetrically located on both sides of the screw rod, and the other end passes through the support plate and is fixedly connected to the limit plate, so that the support plate and the wind speed detection instrument can move up and down under the guidance of the guide rods.

6. The non-disassembly-type wind field detection device according to claim 1, characterized in that: The non-disassembly wind field detection device also includes several drive motors, and the non-disassembly wind field detection device also includes several L-shaped connecting plates. One vertical plate of each L-shaped connecting plate is installed at the bottom of the chassis, and the other vertical plate is used to fix the several drive motors and is provided with a second through hole for placing the bearing. The rotating shaft of the drive motor has an interference fit with the inner diameter of the bearing, and the rotating shaft passes through the inner diameter of the bearing and is connected to the flange, and the flange is fixedly connected to the omnidirectional wheel.

7. The non-disassembly-type wind field detection device according to any one of claims 1 to 6, characterized in that: There are four omnidirectional wheels, which are respectively arranged at the four corners of the chassis.

8. An additive manufacturing device, characterized in that: It comprises a working cavity and the non-disassembly type wind field detection device according to any one of claims 1 to 7, wherein the non-disassembly type wind field detection device is located in the working cavity.

9. The additive manufacturing device according to claim 8, characterized in that The additive manufacturing equipment also includes a storage box, which is arranged on the side wall of the working chamber and above the scraper assembly; or is arranged in the area between the scraper movement limit position of the scraper assembly and the chamber door. The disassembly-free wind field detection device is stored in the storage box by folding the flip plate in the non-working state.

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