Continuous fiber reinforced ceramic additive manufacturing device

Abstract

The invention discloses a continuous fiber-reinforced ceramic additive manufacturing device which comprises a support, a plurality of fiber-reinforced ceramic additive manufacturing devices and a plurality of fiber-reinforced ceramic additive manufacturing devices. The number of the Y-direction sliding table mechanisms is two, the Y-direction sliding table mechanisms are installed on the left side and the right side of the support respectively, and a supporting plate is fixed to a first sliding module of each Y-direction sliding table mechanism. The X-direction sliding table mechanism is connected between the two supporting plates; and the additive manufacturing mechanism is mounted on the second sliding module of the X-direction sliding table mechanism. According to the device, when powder is input into the preheating shell, the electric cylinder drives the sliding plug to press downwards to push the moving speed of the powder, and after the sliding plug slides to a certain distance, the distance between the powder is gradually reduced, so that heat propagation between the powder is rapidly increased, and the temperature difference between the whole powder and a machined part is reduced; and continuous and stable ceramic additive manufacturing operation can be achieved.

Description

Technical Field

[0001] The present invention specifically relates to the technical field of ceramic additive manufacturing, and in particular to a continuous fiber reinforced ceramic additive manufacturing device. Background Art

[0002] The ceramic additive manufacturing device is based on laser digital photocuring technology. It constructs three-dimensional objects by accumulating ceramic materials layer by layer. Specifically, under laser irradiation, short-chain photosensitive resins will form long molecular chains, which will form a mesh around ceramic powder, thereby firmly wrapping the ceramic powder and accumulating it to form a set shape. The superposition of layer by layer of photocuring effect can produce objects of set shapes, and then produce ceramic workpieces. However, since the overall temperature of ceramic manufacturing powder is similar to the temperature at room temperature, if in a low temperature environment (such as winter, refrigeration working environment, etc.), there is a large gap between the powder and the workpiece at a higher temperature after heat curing. If the workpiece is not released heat, and the powder is continuously stacked on the workpiece, it is easy to cause splashing due to excessive cold and heat. There are certain hidden dangers and the cleaning frequency of manufacturing equipment is increased. Summary of the invention

[0003] To this end, the present invention proposes a continuous fiber reinforced ceramic additive manufacturing device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a continuous fiber reinforced ceramic additive manufacturing device, comprising:

[0005] A bracket, which is installed in the processing chamber;

[0006] Two Y-axis slide mechanisms are provided and are respectively installed on the left and right sides of the bracket, and a support plate is fixed on the first sliding module of each Y-axis slide mechanism;

[0007] An X-axis sliding table mechanism connected between the two support plates;

[0008] An additive manufacturing mechanism, which is mounted on the second sliding module of the X-axis sliding table mechanism;

[0009] A Z-direction slide mechanism, which is mounted on the bottom of the bracket, and a base is fixed on the third sliding module of the Z-direction slide mechanism;

[0010] And a control box, which is fixed on the side of the bracket, and the control box can control and adjust the X-axis slide mechanism, the Y-axis slide mechanism and the Z-axis slide mechanism.

[0011] Furthermore, preferably, a heat-resistant metal layer is plated on the surface of the base.

[0012] Further, as a preference, the additive manufacturing mechanism comprises

[0013] A slide seat, which is fixed on the second slide module of the X-axis slide mechanism;

[0014] a laser, which is fixed on the top of the slide;

[0015] a powder feeder fixed to the bottom of the slide;

[0016] A print head is mounted on the bottom surface of the powder feeder, and the print head is connected to the laser and the powder feeder;

[0017] And a powder preheating mechanism is installed at the rear of the slide seat, and the powder preheating mechanism is connected with the powder feeder through a powder feeding pipe.

[0018] Further, as a preference, the powder preheating mechanism comprises

[0019] A cylinder shell, which is fixed on the slide seat, and a sealing cover is installed at the top end of the cylinder shell;

[0020] A preheating shell is arranged in the inner cavity of the cylinder shell, a sliding plug is slidably arranged in the preheating shell, and the sliding plug is driven by an electric cylinder fixed to the top of the cylinder shell;

[0021] A powder conveying pipe, one end of which is connected to the powder conveying device, and the other end of which penetrates into the cylinder shell and is connected to the inner cavity of the preheating shell;

[0022] And a connecting pipe is fixed on the bottom surface of the cylinder shell, and the connecting pipe is connected between the cylinder shell and the powder feeding pipe.

[0023] Further, as a preference, a micro motor is fixed to the bottom surface of the cylindrical shell, and the micro motor is located in the inner cavity of the connecting pipe.

[0024] Further, preferably, the preheating shell includes

[0025] An upper head, the bottom surface of which is fixed with an inner cylinder, and the side wall of the inner cylinder is provided with a convex strip, and the side wall of the bottom of the inner cylinder is provided with a plurality of bayonet holes in a circumferential array;

[0026] A plurality of heating coils are provided and embedded in the inner wall of the inner cylinder at equal intervals;

[0027] The lower sealing head is driven by a micro motor to rotate forward and reverse slightly. The same number of clamping blocks as the bayonet is fixed on the top surface of the lower sealing head, and each of the clamping blocks can be matched with a buckle connection to the bayonet corresponding to it;

[0028] An outer cylinder is sleeved on the inner cylinder and is crimped between the upper head and the lower head;

[0029] And a positioning ring, which is slidably connected to the side wall of the inner tube, the positioning ring is matched and crimped into the annular groove at the bottom of the outer tube, the inner wall of the positioning ring is provided with a vertical notch, and the vertical notch of the positioning ring is matched and slidably connected with the convex strip on the inner tube.

[0030] Further, preferably, a plurality of tooth grooves are arranged in a circumferential array on the edge of the top surface of the positioning ring, each of the tooth grooves is matched with a latching tooth, and each of the latching teeth is fixed on the inner top of the annular groove of the outer cylinder.

[0031] Further, preferably, the side wall of the outer cylinder is provided with powder outlets having the same number as the bayonet ports, and the powder outlets correspond to the bayonet ports one-to-one.

[0032] Further, as a preference, the print head is composed of a fixed seat, a laser head and a plurality of powder spray heads, wherein the fixed seat is fixed on the powder feeder, a laser head is installed at the center of the bottom surface of the fixed seat, and the laser head is connected to the laser;

[0033] There are multiple powder spray heads in a circular array at the edge of the bottom surface of the fixed seat, each of which is connected to a powder feeder, and the multiple powder spray heads are all tilted inwardly, so that the powder sprayed by each powder spray head can intersect with the high-concentration laser generated by the laser head.

[0034] The present invention adopts the above technology and has the following beneficial effects compared with the existing technology: in the device of the present invention, when the powder is input into the preheating shell, the electric cylinder drives the sliding plug to press down to promote the movement rate of the powder, and when the sliding plug slides to a certain distance, the distance between the powders will gradually decrease, thereby quickly increasing the heat transfer between the powders;

[0035] Moreover, the preheating shell powder and gas will be compressed. After the sliding plug continues to slide to the specified position, the micro motor drives the lower head to rotate in the clockwise direction, so that the buckle state of the block and the bayonet is released, and the buckle part of the bayonet is connected with the powder outlet. At this time, the pressure in the inner cylinder is released. At the same time, the sliding plug slides down, pushing the gas and powder out of the powder outlet and into the connecting pipe. Then, the sliding plug and the lower head return to their original positions, and the cycle is repeated to complete the rapid heating of the powder, thereby reducing the temperature difference between the powder as a whole and the workpiece, which is conducive to the realization of continuous and stable ceramic additive manufacturing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of a continuous fiber reinforced ceramic additive manufacturing device;

[0037] Figure 2 It is a structural schematic diagram of an additive manufacturing mechanism in a continuous fiber reinforced ceramic additive manufacturing device;

[0038] Figure 3 It is a schematic diagram of the internal structure of the powder preheating mechanism in the continuous fiber reinforced ceramic additive manufacturing device;

[0039] Figure 4 This is a schematic diagram of the internal structure of the preheating shell in the continuous fiber reinforced ceramic additive manufacturing device;

[0040] Figure 5 It is a schematic diagram of the connection between the positioning ring and the outer cylinder in the continuous fiber reinforced ceramic additive manufacturing device;

[0041] Figure 6 Schematic diagram of the structure of the print head in the continuous fiber reinforced ceramic additive manufacturing device.

[0042] In the figure: 1. Y-axis slide mechanism; 2. base; 3. additive manufacturing mechanism; 4. X-axis slide mechanism; 5. bracket; 6. support plate; 7. control box; 8. Z-axis slide mechanism; 31. laser; 32. slide seat; 33. powder feeder; 34. print head; 35. powder feeding pipe; 36. powder preheating mechanism; 341. fixed seat; 342. powder spraying head; 343. laser head; 361. electric cylinder; 362. preheating shell; 363. pipe; 364. micro motor; 365. powder delivery pipe; 366. sliding plug; 367. upper head; 368. inner cylinder; 369. clamping block; 370. lower head; 371. bayonet; 372. positioning ring; 373. convex strip; 374. powder outlet; 375. outer cylinder; 376. clamping teeth; 377. tooth groove. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example: Please refer to the attached Figure 1-6 The present invention provides a technical solution: a continuous fiber reinforced ceramic additive manufacturing device, which comprises:

[0045] A bracket 5, which is installed in the processing chamber;

[0046] Two Y-axis slide mechanisms 1 are provided and are respectively installed on the left and right sides of the bracket 5, and a support plate 6 is fixed on the first sliding module of each Y-axis slide mechanism 1;

[0047] An X-axis slide mechanism 4 connected between two support plates 6;

[0048] An additive manufacturing mechanism 3, which is mounted on a second sliding module of an X-axis sliding table mechanism 4;

[0049] A Z-direction slide mechanism 8 is installed on the bottom of the bracket 5. The base 2 is fixed on the third sliding module of the Z-direction slide mechanism 8, that is, the base is directly adjusted in the Z direction through the Z-direction slide mechanism;

[0050] And a control box 7 is fixed on the side of the bracket 5, and the control box 7 can control and adjust the X-axis slide mechanism 4, the Y-axis slide mechanism 1 and the Z-axis slide mechanism 8.

[0051] In this embodiment, a heat-resistant metal layer is plated on the surface of the base 2, such as titanium, aluminum or other metal materials.

[0052] In this embodiment, the additive manufacturing mechanism 3 includes

[0053] A slide seat 32, which is fixed on the second slide module of the X-axis slide mechanism 4;

[0054] A laser 31, which is fixed on the top of a slide 32;

[0055] A powder feeder 33, which is fixed to the bottom of the slide 32;

[0056] A print head 34 is mounted on the bottom surface of the powder feeder 33, and the print head 34 connects the laser 31 and the powder feeder 33;

[0057] And a powder preheating mechanism 36 is installed at the rear of the slide seat 32 , and the powder preheating mechanism 36 is connected to the powder feeder 33 through a powder feeding pipe 35 .

[0058] In this embodiment, the powder preheating mechanism 36 includes

[0059] The cylinder shell is fixed on the slide seat 32, and a cover is installed at the top end of the cylinder shell;

[0060] A preheating shell 362 is arranged in the inner cavity of the cylinder shell, and a sliding plug 366 is slidably arranged in the preheating shell 362, and the sliding plug 366 is driven by an electric cylinder 1 fixed to the top of the cylinder shell;

[0061] A powder conveying pipe 365, one end of which is connected to the powder conveying device, and the other end of which penetrates into the cylinder shell and is connected to the inner cavity of the preheating shell 362;

[0062] And a connecting pipe 363 is fixed on the bottom surface of the cylinder shell, and the connecting pipe 363 is connected between the cylinder shell and the powder feeding pipe 35.

[0063] In this embodiment, a micro motor 364 is fixed to the bottom surface of the cylindrical shell, and the micro motor 364 is located in the inner cavity of the connecting pipe 363 .

[0064] In this embodiment, the preheating shell 362 includes

[0065] The upper end cap 367 has an inner cylinder 368 fixed to its bottom surface, and a convex strip 373 is protruded on the side wall of the inner cylinder 368, and a plurality of bayonet holes 371 are arranged in a circumferential array on the side wall of the bottom of the inner cylinder 368;

[0066] A plurality of heating coils are provided and are embedded in the inner wall of the inner cylinder 368 at equal intervals;

[0067] The lower sealing head 370 is driven by the micro motor 364 to rotate slightly forward and reverse. The same number of blocks 369 as the bayonet 371 are fixed on the top surface of the lower sealing head 370, and each block 369 can be matched with a bayonet connection to the corresponding bayonet 371;

[0068] Specifically, the micro motor 364 controls the lower head 370 to perform a small positive and negative rotation, so that the card block can be moved out and inserted;

[0069] The outer cylinder 375 is sleeved on the inner cylinder 368 and crimped between the upper head 367 and the lower head 370;

[0070] And a positioning ring 372, which is slidably connected to the side wall of the inner tube 368, and the positioning ring 372 matches the annular groove at the bottom of the crimped outer tube 375. A vertical notch is provided on the inner wall of the positioning ring 372, and the vertical notch of the positioning ring 372 matches and slides with the convex strip 373 on the inner tube 368.

[0071] In this embodiment, a plurality of tooth grooves 377 are arranged in a circumferential array on the edge of the top surface of the positioning ring 372 , each tooth groove 377 is matched with a latching tooth 376 , and each latching tooth 376 is fixed on the inner top of the annular groove of the outer cylinder 375 .

[0072] In this embodiment, the side wall of the outer cylinder 375 is provided with the same number of powder outlets 374 as the bayonet 371 , and the powder outlets 374 correspond to the bayonet 371 one by one;

[0073] It should be added that when the clamping block 369 and the clamping port 371 are released from the clamping state, the space left by the clamping port 371 is connected to the powder outlet 374;

[0074] That is, when the powder is input into the preheating shell 362, the electric cylinder 1 drives the plunger to press down to promote the movement rate of the powder, and when the plunger slides to a certain distance, the distance between the powders will gradually decrease, thereby quickly increasing the heat transfer between the powders;

[0075] Moreover, the powder and gas in the preheating shell 362 will be compressed. After the sliding plug continues to slide to the specified position, the micro motor drives the lower head to rotate in the clockwise direction, so that the buckling state of the block 369 and the bayonet 371 is released, and the buckle part of the bayonet 371 is connected with the powder outlet 374. At this time, the pressure in the inner cylinder 368 is released. At the same time, the sliding plug slides down, pushing the gas and powder out of the powder outlet 374 and into the connecting pipe 363. This cycle is repeated to complete the rapid heating operation of the powder.

[0076] In this embodiment, the print head 34 is composed of a fixed seat 341, a laser head 343 and a plurality of powder spray heads 342, wherein the fixed seat 341 is fixed on the powder feeder 33, the laser head 343 is installed at the center of the bottom surface of the fixed seat 341, and the laser head 343 is connected to the laser 31;

[0077] There are multiple powder spray heads 342 in a circular array at the edge of the bottom surface of the fixed seat 341. Each powder spray head 342 is connected to the powder feeder 33, and the multiple powder spray heads 342 are all tilted inwardly so that the powder sprayed by each powder spray head 342 can intersect with the high-concentration laser generated by the laser head 343.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous fiber reinforced ceramic additive manufacturing device, characterized in that: It includes: A bracket (5) installed in the processing chamber; Two Y-axis slide mechanisms (1) are provided and are respectively mounted on the left and right sides of the bracket (5), and a support plate (6) is fixed on the first sliding module of each Y-axis slide mechanism (1); An X-axis sliding platform mechanism (4) connected between the two support plates (6); An additive manufacturing mechanism (3), which is mounted on a second sliding module of the X-axis sliding table mechanism (4); A Z-direction slide mechanism (8) mounted on the bottom of the bracket (5), wherein a base (2) is fixed on a third sliding module of the Z-direction slide mechanism (8); and a control box (7) fixed to the side of the bracket (5), wherein the control box (7) is capable of controlling and adjusting the X-axis slide mechanism (4), the Y-axis slide mechanism (1) and the Z-axis slide mechanism (8).

2. The continuous fiber reinforced ceramic additive manufacturing device according to claim 1, characterized in that: The surface of the base (2) is plated with a heat-resistant metal layer.

3. The continuous fiber reinforced ceramic additive manufacturing device according to claim 1, characterized in that: The additive manufacturing mechanism (3) comprises A slide seat (32) fixed on the second slide module of the X-axis slide mechanism (4); A laser (31) fixed on the top of the slide (32); A powder feeder (33) fixed to the bottom of the slide seat (32); A print head (34) mounted on the bottom surface of the powder feeder (33), wherein the print head (34) is connected to the laser (31) and the powder feeder (33); and a powder preheating mechanism (36) which is installed at the rear of the slide seat (32), and the powder preheating mechanism (36) is connected to the powder feeder (33) via a powder feeding pipe (35).

4. The continuous fiber reinforced ceramic additive manufacturing device according to claim 3, characterized in that: The powder preheating mechanism (36) comprises A cylinder shell, which is fixed on the slide seat (32), and a sealing cover is installed at the top end of the cylinder shell; A preheating shell (362) is arranged in the inner cavity of the cylinder shell, a sliding plug (366) is slidably arranged in the preheating shell (362), and the sliding plug (366) is driven by an electric cylinder (1) fixed to the top of the cylinder shell; A powder conveying pipe (365), one end of which is connected to the powder conveying device, and the other end of which penetrates into the cylinder shell and is connected to the inner cavity of the preheating shell (362); And a connecting pipe (363) is fixed on the bottom surface of the cylinder shell, and the connecting pipe (363) is connected between the cylinder shell and the powder delivery pipe (35).

5. The continuous fiber reinforced ceramic additive manufacturing device according to claim 4, characterized in that: A micro motor (364) is fixed to the bottom surface of the cylindrical shell, and the micro motor (364) is located in the inner cavity of the connecting pipe (363).

6. The continuous fiber reinforced ceramic additive manufacturing device according to claim 5, characterized in that: Preheating shell (362) includes An upper sealing head (367) has an inner cylinder (368) fixed on its bottom surface, a convex strip (373) protruding from the side wall of the inner cylinder (368), and a plurality of bayonet holes (371) arranged in a circumferential array on the side wall of the bottom of the inner cylinder (368); A plurality of heating rings are provided and embedded in the inner wall of the inner cylinder (368) at equal intervals; A lower sealing head (370) driven by a micro motor (364) to perform small forward and reverse rotations, wherein the same number of clamping blocks (369) as the number of the clamping ports (371) are fixed on the top surface of the lower sealing head (370), and each of the clamping blocks (369) can be matched with a clamping connection to a corresponding clamping port (371); An outer cylinder (375) is sleeved on the inner cylinder (368) and is crimped between the upper sealing head (367) and the lower sealing head (370); And a positioning ring (372) which is slidably connected to the side wall of the inner tube (368), the positioning ring (372) is matched and crimped into the annular groove at the bottom of the outer tube (375), a vertical notch is provided on the inner wall of the positioning ring (372), and the vertical notch of the positioning ring (372) is matched and slidably connected with the convex strip (373) on the inner tube (368).

7. The continuous fiber reinforced ceramic additive manufacturing device according to claim 6, characterized in that: A plurality of tooth grooves (377) are arranged in a circumferential array on the edge of the top surface of the positioning ring (372), each of the tooth grooves (377) is matched with a latching tooth (376), and each of the latching teeth (376) is fixed on the inner top of the annular groove of the outer cylinder (375).

8. The continuous fiber reinforced ceramic additive manufacturing device according to claim 7, characterized in that: The side wall of the outer cylinder (375) is provided with powder outlets (374) having the same number as the bayonet holes (371), and the powder outlets (374) correspond one to one to the bayonet holes (371).

9. The continuous fiber reinforced ceramic additive manufacturing device according to claim 3, characterized in that: The printing head (34) is composed of a fixed seat (341), a laser head (343) and a plurality of powder spray heads (342), wherein the fixed seat (341) is fixed on the powder feeder (33), a laser head (343) is installed at the center of the bottom surface of the fixed seat (341), and the laser head (343) is connected to the laser (31); A plurality of powder spray heads (342) are arranged in a circular array at the edge of the bottom surface of the fixed seat (341), each of the powder spray heads (342) is connected to the powder feeder (33), and the plurality of powder spray heads (342) are arranged to be tilted inwardly, so that the powder sprayed by each of the powder spray heads (342) can intersect with the high-concentration laser generated by the laser head (343).

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