Auxiliary positioning support for ceramic core for 3D printing

Abstract

The utility model discloses an auxiliary positioning support for a ceramic core for 3D printing, and relates to the technical field of ceramic core processing, the auxiliary positioning support comprises an adjustable clamping device and a bottom frame, a supporting frame is an I-shaped steel structural part, the adjustable clamping device comprises four groups of electric telescopic rods and a supporting frame, and the supporting frame is arranged on the bottom frame. A plurality of clamping arms are fixedly installed at the lower end of the supporting frame, the clamping arms are distributed at the lower end of the supporting frame in a bilateral symmetry mode, clamping heads are fixedly installed at the lower ends of the clamping arms, and four protruding parts at the two ends of the supporting frame are fixed to the outer walls of the extending ends of electric telescopic rods correspondingly. The outer-layer support is prepared through the 3D printing technology, the precision and efficiency of ceramic core boxing are improved, the automatic clamping device and the customized base plate are utilized, automatic operation of ceramic core boxing is achieved, manual intervention is reduced, meanwhile, the customized base plate can be replaced according to the shape of a sagger, and the universality and flexibility of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of ceramic core processing technology, and in particular to an auxiliary positioning bracket for 3D printed ceramic cores. Background Technology

[0002] In the field of precision casting, the use of ceramic cores is crucial, especially in the production of complex hollow castings, such as high-temperature alloy components like turbine blades for aero-engines. These components are subjected to extreme temperatures and pressures during operation, thus placing extremely high demands on the performance of the ceramic cores. However, traditional ceramic core preparation methods, such as hot press molding, suffer from sintering deformation, primarily due to factors such as thermal stress, volume shrinkage, and particle rearrangement during the sintering process. Sintering deformation not only reduces the quality of the casting but can also lead to extended production cycles and increased costs.

[0003] Currently, various process schemes are employed to control the sintering deformation of ceramic cores. For example, by adding sintering aids such as Al2O3 and Y2O3, the sintering density of difficult-to-sinter ceramics can be promoted at lower temperatures, thereby improving the performance of the ceramics. In addition, patented technologies have proposed saggers for sintering ceramic cores with correction functions. These saggers are designed with support surfaces that conform to the contours of the ceramic core, allowing pressure to be applied to the core during sintering to reduce cracks and improve dimensional accuracy. However, this method still has some problems. For example, the complex structure of the sagger may lead to uneven heating during sintering, and the cleaning work after sintering is cumbersome, increasing production costs. Furthermore, the common sagger molding process also suffers from low efficiency and high labor costs.

[0004] To address these issues, 3D printing technology can be used to quickly manufacture outer supports that precisely match the ceramic core. These supports provide necessary support during sintering and can be removed during the sintering process, thus avoiding complex post-processing steps. Combined with the application of a casing device, this effectively ensures consistency during the casing process, improves casing efficiency, reduces costs, and minimizes environmental impact. Utility Model Content

[0005] The purpose of this invention is to solve the problems in the existing technology where the complex structure of the sagger may lead to uneven heating during the sintering process, and the cleaning work after sintering is cumbersome, increasing production costs. In addition, the common sagger molding process also has the problems of low efficiency and high labor costs. Therefore, an auxiliary positioning bracket for 3D printed ceramic cores is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an auxiliary positioning bracket for 3D printed ceramic cores, comprising an adjustable clamping device and a base frame. The support frame is an I-shaped steel structure. The adjustable clamping device includes four sets of electric telescopic rods and a support frame. Multiple sets of clamping arms are fixedly installed at the lower end of the support frame, and the multiple sets of clamping arms are symmetrically distributed on the lower end of the support frame. Each set of clamping arms has a clamping head fixedly installed at its lower end. The four protruding parts at both ends of the support frame are respectively fixed to the outer wall of the extended end of the electric telescopic rod.

[0007] Preferably, an outer support is provided below the clamping head, and a ceramic core is provided on one side of the outer support.

[0008] Preferably, the lower ends of all four sets of electric telescopic rods are fixed to the upper end of the base frame.

[0009] Preferably, a sagger is provided above the base frame, the sagger is located in the middle of the adjustable clamping device, two sets of slide rails are fixedly installed at the upper end of the base frame, and the outer support and ceramic core are both located above the sagger.

[0010] Preferably, two sets of sliding components are slidably installed on the outer walls of both sets of slide rails, and mounting plates are fixedly installed on the upper ends of all four sets of sliding components.

[0011] Preferably, the upper end of the four sets of mounting plates is provided with a customized chassis, and the lower end of the sagger is in contact with the upper end of the customized chassis.

[0012] Preferably, a controller is fixedly installed on one side of the base frame, all four sets of electric telescopic rods are connected to the controller via signal, all sets of clamping heads are connected to the controller via signal, and all four sets of sliding components are electrically connected to the controller.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the outer support is prepared by 3D printing technology, which improves the accuracy and efficiency of ceramic core packing.

[0015] 2. In this utility model, the automatic clamping device and customized chassis are used to realize the automated operation of ceramic core loading, reduce manual intervention and improve work efficiency.

[0016] 3. In this utility model, the base can be customized according to the shape of the sagger, which improves the versatility and flexibility of the device. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of an auxiliary positioning bracket for 3D printed ceramic cores is provided for this utility model.

[0018] Figure 2 This utility model provides an outer support for an auxiliary positioning bracket for 3D printed ceramic cores and a schematic diagram of the ceramic core structure.

[0019] Figure 3 This invention proposes an auxiliary positioning bracket for 3D-printed ceramic cores. Figure 1 Enlarged view of point A in the middle.

[0020] Legend: 1. Adjustable clamping device; 11. Electric telescopic rod; 12. Support frame; 13. Clamping arm; 2. Base frame; 3. Slide rail; 4. Sagger; 5. Sliding assembly; 6. Mounting plate; 7. Clamping head; 8. Outer support; 9. Ceramic core; 10. Controller. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 - Figure 3 As shown, this utility model provides an auxiliary positioning bracket for 3D printed ceramic cores, including an adjustable clamping device 1 and a base frame 2. The adjustable clamping device 1 includes four sets of electric telescopic rods 11 and a support frame 12. The support frame 12 is an I-shaped steel structure. Multiple sets of clamping arms 13 are fixedly installed at the lower end of the support frame 12, and the multiple sets of clamping arms 13 are symmetrically distributed on the lower end of the support frame 12. Each set of clamping arms 13 has a clamping head 7 fixedly installed at the lower end. The four protruding parts at both ends of the support frame 12 are respectively fixed to the outer wall of the extended end of the electric telescopic rod 11.

[0024] like Figure 1 and Figure 2As shown, an outer support 8 is provided below the clamping head 7, and a ceramic core 9 is provided on one side of the outer support 8. A sagger 4 is provided above the base frame 2. The sagger 4 is located in the middle of the adjustable clamping device 1. Two sets of slide rails 3 are fixedly installed on the upper end of the base frame 2. The outer support 8 and the ceramic core 9 are both located above the sagger 4. The outer support 8 is 3D printed using FDM technology and has a contour that matches the ceramic core 9. During the printing process, the three-dimensional model of the outer support 8 is first designed using CAD software, and then the model is imported into the 3D printer. Appropriate printing parameters such as layer thickness and printing speed are selected for printing. Specifically, its shape is an L-shaped structure. The bottom of the L-shape can support the ceramic core 9 before it is placed in the sagger. The top of the outer support 8 is also provided with a protrusion to facilitate clamping by the clamping head 7 and prevent the outer support 8 and the ceramic core 9 from falling off the clamping head 7.

[0025] like Figure 1 As shown, the lower ends of the four sets of electric telescopic rods 11 are all fixed to the upper end of the base frame 2, wherein the base frame 2 can provide support for the four sets of electric telescopic rods 11.

[0026] like Figure 1 and Figure 3 As shown, two sets of sliding components 5 are slidably installed on the outer walls of both sets of slide rails 3. Mounting plates 6 are fixedly installed on the upper ends of all four sets of sliding components 5. Customized bases are provided on the upper ends of the four mounting plates 6. The lower end of the sagger 4 contacts the upper end of the customized base. Slide rails 3 are fixedly installed on the base frame 2. The slide rails 3 and the support frame 12 are perpendicular to each other in horizontal projection. Sliding components 5, which can slide along the length of the slide rails 3, are movably installed on the slide rails 3. The position of the sliding components 5 on the slide rails 3 can be changed by electrical signals. Mounting plates 6 are integrally formed on the bottom of the sagger 4. The mounting plates 6 and sliding components 5 are connected by fasteners, such as commonly used screws or rivets. By controlling the sliding components 5, the sagger 4 can be moved along the slide rails 3.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, a controller 10 is fixedly installed on one side of the base frame 2. All four sets of electric telescopic rods 11 are connected to the controller 10 via signal. All sets of clamping heads 7 are connected to the controller 10 via signal. All four sets of sliding components 5 are electrically connected to the controller 10. The controller 10 can control the vertical extension and retraction of the electric telescopic rods 11, the horizontal movement of the sliding components 5, and the opening and closing of the clamping heads 7.

[0028] The usage and working principle of this device are as follows: First, clamp a varying number of outer support 8 and ceramic core 9 assemblies on the clamping head 7. Then, determine the appropriate size of the sagger 4 based on the number of outer support 8 and ceramic core 9 assemblies being clamped. The standard for selecting the sagger 4 is that its length can accommodate all the clamped outer support 8 and ceramic core 9 assemblies. After installing the sagger 4 on the four sets of mounting plates 6, control the adjustable clamping device 1 to move downwards via the controller 10, placing the outer support 8 and ceramic core 9 assemblies into the sagger 4. After the sagger is loaded, control the adjustable clamping device 1 to rise, disengaging the left clamping head 7 from the sagger 4. Then, control the four sets of sliding components 5 via the controller 10. The four sets of sliding components 5 slide on the two sets of slide rails 3 respectively, and the four sets of sliding components 5 drive the sagger 4 to slide to the right via the four sets of mounting plates 6 until it moves to below the right clamping head 7. Repeat the downward movement of the adjustable clamping device 1 to complete the sagger loading operation on the right side.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An auxiliary positioning bracket for 3D printed ceramic cores, characterized in that: The utility model provides a kind of adjustable clamping device (1) and underframe (2), the adjustable clamping device (1) includes four groups of electric telescopic rod (11) and support frame (12), the support frame (12) is I-shaped steel structural member, the lower end of the support frame (12) is fixedly installed with multiple groups of clamping arm (13), and multiple groups of clamping arm (13) are symmetrically distributed in the lower end of support frame (12), the lower end of multiple groups of clamping arm (13) is fixedly installed with clamping head (7), and the outer wall of the extension end of electric telescopic rod (11) is fixed with four protruding parts of the both ends of support frame (12) respectively.

2. The auxiliary positioning support for 3D printed ceramic cores according to claim 1, characterized in that: The lower side of the clamping head (7) is provided with an outer support (8), and the outer support (8) is provided with a ceramic core (9) on one side.

3. The auxiliary positioning support for 3D printed ceramic cores according to claim 1, characterized in that: The lower end of the four groups of electric telescopic rod (11) is fixed with the upper end of the underframe (2).

4. The auxiliary positioning support for 3D printed ceramic cores according to claim 2, characterized in that: The upper side of the underframe (2) is provided with a sagger (4), and the sagger (4) is located in the middle of the adjustable clamping device (1), and the upper end of the underframe (2) is fixedly installed with two groups of slide rails (3), and the outer support (8) and the ceramic core (9) are located above the sagger (4).

5. The auxiliary positioning support for 3D printed ceramic cores according to claim 4, characterized in that: The outer wall of the two groups of slide rails (3) is slidably installed with two groups of sliding assemblies (5), and the upper end of the four groups of sliding assemblies (5) is fixedly installed with mounting plate (6).

6. The auxiliary positioning support for 3D printed ceramic cores according to claim 5, characterized in that: The upper end of the four groups of mounting plate (6) is provided with a customized chassis, and the lower end of the sagger (4) is in contact with the upper end of the customized chassis.

7. The auxiliary positioning support for 3D printed ceramic cores according to claim 5, characterized in that: The side of the underframe (2) is fixedly installed with a controller (10), and the four groups of electric telescopic rod (11) are electrically connected with the controller (10), and the multiple groups of clamping head (7) are signal connected with the controller (10), and the four groups of sliding assemblies (5) are electrically connected with the controller (10).

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