Boron carbide annular pellet wire cutting jig

Abstract

The utility model relates to the technical field of cutting jigs, and discloses a boron carbide annular pellet wire cutting jig which comprises a lower cover, a plurality of fixing plates are fixedly connected to the periphery of the outer portion of the lower cover at equal intervals, a middle cavity is clamped to the top of the lower cover, and an upper cover is arranged at the top of the middle cavity. A middle cavity is formed in the upper cover, a plurality of connecting blocks are fixedly connected to the periphery of the exterior of the middle cavity at equal intervals, two cutting guide strips are arranged on the sides, away from each other, of the connecting blocks, the cutting guide strips are connected with the middle cavity through fixing assemblies, and a pressing mechanism is arranged at the top of the upper cover. The pressing mechanism is used for pressing and fixing the annular core blocks placed on the outer side of the top of the lower cover and the outer side of the top of the middle cavity. According to the utility model, the upper, middle and lower three-section fixing mode is adopted, and the design that two annular blocks can be processed at the same time at a time is combined, so that the working efficiency is doubled again on the basis that the original efficiency is improved, and the production capacity is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of cutting fixture technology, and in particular to a boron carbide ring core wire cutting fixture. Background Technology

[0002] Boron carbide is an engineering material. Boron carbide toroidal cores, as a product with a specific shape, have excellent properties such as high hardness, good wear resistance, and low density. They have a wide range of critical applications in the energy field. They can be used as control rod materials to achieve precise control of reactor power and ensure the safe and stable operation of the reactor.

[0003] With the rapid development of modern industry and technology, increasingly stringent requirements have been placed on the dimensional accuracy, shape complexity, and performance stability of boron carbide toroidal cores. In the nuclear industry, to make reaction process control more precise and efficient, boron carbide toroidal cores need to be cut into components of specific sizes and shapes to meet the needs of different reactor designs. In the aerospace field, to adapt to complex aircraft structures and lightweight requirements, boron carbide toroidal cores must be precisely cut and processed into irregularly shaped components that meet aerodynamic design and structural strength requirements. Therefore, high-precision cutting of boron carbide toroidal cores has become an urgent need for further development in related fields.

[0004] Existing boron carbide toroidal core wire EDM fixtures utilize molybdenum wire as an electrode. High temperatures are generated through pulsed spark discharge, melting or vaporizing the boron carbide toroidal core for cutting. This avoids the material damage caused by the large cutting forces of traditional mechanical cutting methods, as well as the resulting increased surface roughness and difficulty in controlling dimensional accuracy. However, these fixtures employ relatively simple positioning and fixing methods, clamping the toroidal core from the outside. During the cutting process, especially towards the end, the toroidal core's weight and the inevitable slight vibration of the molybdenum wire during discharge cause displacement. This leads to chipping and corner breakage at the cut edge, severely impacting product quality and resulting in a high defect rate, failing to meet the stringent precision requirements of high-end applications. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a boron carbide ring core wire cutting fixture, which aims to improve the problem in the prior art where the ring core is clamped from the outside using a simple positioning and fixing method, resulting in chipping and corner breaking at the cutting edge during the cutting process, which seriously affects product quality and leads to a high defect rate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a boron carbide annular core block wire cutting fixture, including a lower cover, multiple fixing plates are fixedly connected at equal intervals around the outer periphery of the lower cover, a middle cavity is engaged at the top of the lower cover, an upper cover is provided at the top of the middle cavity, multiple connecting blocks are fixedly connected at equal intervals around the outer periphery of the middle cavity, two cutting guide strips are provided on the opposite side of each of the multiple connecting blocks, the multiple cutting guide strips are connected to the middle cavity through a fixing assembly, and a pressing mechanism is provided at the top of the upper cover, the pressing mechanism being used to press and fix the annular core block placed on the outer side of the top of the lower cover and the outer side of the top of the middle cavity;

[0007] The pressing mechanism includes a pressing plate. A hidden groove is provided on the top of the upper cover. The pressing plate is disposed inside the hidden groove. A locking bolt is fixedly connected to the bottom of the pressing plate. The locking bolt passes through the middle cavity and is threaded to the middle of the inner bottom wall of the lower cover. Concentric positioning pins are fixedly connected to the left and right sides of the bottom of the upper cover. The two concentric positioning pins pass through and are slidably connected to the top left and right sides of the lower cover and the middle cavity. A manual rotation component is provided on the top of the locking bolt and the concentric positioning pin.

[0008] As a further description of the above technical solution:

[0009] The fixing component includes multiple fixing screws, and fixing grooves are opened in the middle of the opposite side of the multiple cutting guides. The multiple fixing screws pass through the multiple fixing grooves and are threaded to the outside of the cavity.

[0010] As a further description of the above technical solution:

[0011] The manual rotation assembly includes multiple hexagonal heads, which are respectively fixedly connected to the top of the locking bolt and two concentric positioning pins. A knob ring is fixedly connected to the top of each of the two hexagonal heads.

[0012] As a further description of the above technical solution:

[0013] Each of the aforementioned fixing plates has two mounting holes on its top.

[0014] As a further description of the above technical solution:

[0015] The angle between the plurality of fixed plates is 120 degrees, and the plurality of connecting blocks are respectively disposed between adjacent fixed plates, and the angle between adjacent connecting blocks is 120 degrees.

[0016] As a further description of the above technical solution:

[0017] The outer surface of the knob ring is designed with a smooth finish.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, by adopting a three-section fixing method (upper, middle, and lower) and combining it with a design that can process two ring blocks at the same time, the single cutting efficiency is greatly improved. Compared with the traditional method, this design does not require frequent replacement and adjustment of workpieces during the cutting process, reducing auxiliary time and greatly improving equipment utilization. On the basis of the original efficiency improvement, the work efficiency is doubled again, and the production capacity is greatly increased.

[0020] 2. In this utility model, the rotating locking bolt drives the extrusion plate to press the annular core block, while the concentric positioning pin ensures that each component is precisely matched. This ensures that the core block remains stable because it is tightly locked, regardless of the action of the molybdenum wire during cutting. This effectively avoids problems such as chipping and corner breakage, significantly reduces the product defect rate, improves product quality, reduces raw material waste, and enhances the product's market competitiveness. Attached Figure Description

[0021] Figure 1 This is a perspective view of the boron carbide annular core wire cutting fixture proposed in this utility model;

[0022] Figure 2 This is a front view of the boron carbide annular core wire cutting fixture proposed in this utility model;

[0023] Figure 3 This is an exploded view of the boron carbide annular core wire cutting fixture proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the central cavity in the boron carbide annular core wire cutting fixture proposed in this utility model;

[0025] Figure 5 This is a schematic diagram of the cutting guide strip in the boron carbide annular core wire EDM fixture proposed in this utility model.

[0026] Legend:

[0027] 1. Lower cover; 2. Fixing plate; 3. Middle cavity; 4. Upper cover; 5. Connecting block; 6. Cutting guide strip; 7. Fixing groove; 8. Fixing screw; 9. Hidden groove; 10. Extrusion plate; 11. Locking bolt; 12. Concentric positioning pin; 13. Hex head; 14. Knob ring; 15. Mounting hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Reference Figures 1-4 This utility model provides an embodiment of a boron carbide annular core wire cutting fixture, comprising a lower cover 1. Multiple fixing plates 2 are equidistantly fixed to the outer periphery of the lower cover 1, providing a stable support foundation for the entire fixture. This ensures the fixture is placed stably and reliably on the wire cutting equipment, preventing easy shaking or displacement due to external forces, thus creating favorable conditions for subsequent precise cutting operations. A central cavity 3 is engaged at the top of the lower cover 1. This engagement facilitates the positioning and assembly of the central cavity 3 and the lower cover 1, enabling quick and accurate operation during installation and disassembly, thereby improving production efficiency. An upper cover 4 is provided at the top of the central cavity 3. The upper cover 4 cooperates with the central cavity 3 to form a relatively closed space with the lower cover 1, used to accommodate and fix the annular core, preventing it from detaching during cutting. Multiple connecting blocks 5 are equidistantly fixed to the outer periphery of the central cavity 3, connecting... Block 5 acts as a bridge connecting the central cavity 3 and the cutting guide strip 6, ensuring that the cutting guide strip 6 can be stably set around the central cavity 3, providing an accurate guiding path for the cutting molybdenum wire. Two cutting guide strips 6 are set on the opposite side of the multiple connecting blocks 5. These cutting guide strips 6 can accurately limit the travel path of the cutting molybdenum wire, ensuring that the shape of the cut annular core tile meets the design requirements, effectively improving the cutting accuracy. Multiple cutting guide strips 6 are connected to the central cavity 3 through a fixing component, so that the cutting guide strip 6 is firmly fixed on the central cavity 3, avoiding displacement during the cutting process and ensuring the stability of the cutting path. The top of the upper cover 4 is provided with a clamping mechanism, which is used to clamp and fix the annular core block placed on the top outer side of the lower cover 1 and the top outer side of the central cavity 3, ensuring that the annular core block will not be displaced during cutting, greatly improving the cutting accuracy and the product qualification rate.

[0030] The clamping mechanism includes a pressing plate 10. As a component that directly contacts and applies pressure to the annular core block, the pressing plate 10 can tightly adhere to the surface of the annular core block when subjected to driving force, ensuring the annular core block is stably fixed within the fixture and effectively preventing movement during cutting, thus guaranteeing cutting accuracy. A hidden groove 9 is provided on the top of the upper cover 4, providing storage space for the pressing plate 10. This allows the pressing plate 10 to remain in place without affecting the normal installation of the upper cover 4 or the operation of other components when not in use, while also enabling smooth movement within this space during operation, ensuring... The pressing action proceeds smoothly. An extrusion plate 10 is installed inside the hidden groove 9, which can move up and down within a certain range within the hidden groove 9. By changing its position, the pressing and releasing operations of the annular core block are achieved, facilitating flexible control of the fixed state of the annular core block before and after cutting. A locking bolt 11 is fixedly connected to the bottom of the extrusion plate 10. The locking bolt 11 connects to the extrusion plate 10, converting rotation into linear motion. The up and down displacement of the extrusion plate 10 is precisely controlled through threaded transmission, thereby precisely adjusting the pressing force on the annular core block to meet different cutting requirements. The locking bolt 11 passes through the central cavity 3 and is threaded to the middle of the inner bottom wall of the lower cover 1. This connection method makes the upper cover 4, the central cavity 3, and the lower cover 1 form an organic whole through the locking bolt 11, enhancing the overall structural stability of the fixture, while ensuring the accuracy and reliability of the extrusion plate 10 during its up-and-down movement. Concentric positioning pins 12 are fixedly connected to the left and right sides of the bottom of the upper cover 4. The concentric positioning pins 12 can accurately determine the relative positions between the upper cover 4, the central cavity 3, and the lower cover 1, ensuring the consistency of the position of each component during each installation, thus providing a stable foundation for the annular core block. Precise positioning helps improve cutting accuracy. Two concentric positioning pins 12 are connected to the top left and right sides of the lower cover 1 and the middle cavity 3 through and slidingly. While ensuring positioning accuracy, the upper cover 4 is allowed to be installed and disassembled within a certain range, which facilitates the assembly and use of the fixture. The top of the locking bolt 11 and the concentric positioning pin 12 are equipped with manual rotation components. The manual rotation components make it easy for the operator to apply torque and easily realize the rotation operation of the locking bolt 11 and the insertion and removal operation of the concentric positioning pin 12, which improves the convenience and efficiency of the fixture operation.

[0031] Reference Figure 1 , Figure 3 and Figure 5The fixing assembly includes multiple fixing screws 8, which serve as the components connecting the cutting guide strip 6 and the central cavity 3. Through threaded connection, the cutting guide strip 6 is securely fixed to the central cavity 3, effectively preventing loosening or displacement during cutting and ensuring a stable and precise guiding path for the molybdenum wire. Each of the multiple cutting guide strips 6 has a fixing groove 7 at the center of its furthest side. The fixing groove 7 provides a precise installation position for the fixing screws 8, allowing them to accurately pass through and stably connect the cutting guide strip 6 to the central cavity 3. This ensures a tight and reliable connection between the cutting guide strip 6 and the central cavity 3, thereby improving the accuracy of the cutting operation. The multiple fixing screws 8 pass through multiple fixing grooves 7 and are threaded onto the outside of the central cavity 3. This connection method allows the cutting guide strip 6 to fit tightly against the central cavity 3, enhancing the stability of the entire fixture structure. This prevents the cutting guide strip 6 from deforming or shifting due to the force of the molybdenum wire during cutting, ensuring the smooth progress of the cutting process. The cutting precision and manual rotation component include multiple hexagonal heads 13. The hexagonal heads 13 provide operators with a convenient structure for applying force. Their special hexagonal shape can perfectly match tools such as wrenches, allowing operators to easily rotate the locking bolt 11 and the concentric positioning pin 12, improving the convenience and efficiency of operation. The multiple hexagonal heads 13 are respectively fixedly connected to the top of the locking bolt 11 and the two concentric positioning pins 12. This connection method ensures that the torque applied by the operator can be effectively transmitted to the locking bolt 11 and the concentric positioning pin 12, realizing precise control of the clamping mechanism and the positioning mechanism, ensuring the normal operation of the fixture and the accurate fixing and positioning of the annular core block. The top of each of the two hexagonal heads 13 is fixedly connected to a knob ring 14. The knob ring 14 further facilitates manual operation by the operator. Even without tools, the operator can easily rotate the hexagonal head 13 by holding the knob ring 14, thereby operating the locking bolt 11 and the concentric positioning pin 12, improving the flexibility and convenience of using the fixture.

[0032] Reference Figure 1 , Figure 2 and Figure 4Each of the multiple fixing plates 2 has two mounting holes 15 on its top. These mounting holes 15 facilitate the connection between the fixing plates 2 and the wire cutting equipment. Using compatible connectors, the fixing plates 2 can be stably fixed to the equipment, ensuring that the entire fixture will not shift or shake during the cutting process, thus guaranteeing the accuracy and stability of the cutting operation. The angle between the multiple fixing plates 2 is 120 degrees. This specific angle distribution ensures that when cutting the annular core block, each time the fixing plate 2 is used as a fixed fulcrum, the cutting can be performed at a uniform angle. This facilitates accurately cutting the annular core block into three tile shapes, improving cutting efficiency and product consistency. Multiple connecting blocks 5 are respectively set on multiple... The angle between adjacent fixed plates 2 and between adjacent connecting blocks 5 is 120 degrees. The reasonable layout of connecting blocks 5 between fixed plates 2 not only enhances the overall strength of the fixture structure, but also ensures that the cutting guide strip 6 is evenly distributed around the annular core block, providing all-round and balanced guidance for cutting molybdenum wire, further improving cutting accuracy. The outer surface of the knob ring 14 is designed with a smooth shape. The smooth outer surface design makes it comfortable for operators to manually turn the knob ring 14, and it is not easy to scratch their hands. At the same time, it reduces the operational obstacles caused by sharp corners, etc., and makes it convenient for operators to quickly and smoothly operate the locking bolt 11 and the concentric positioning pin 12, improving the convenience and safety of operation.

[0033] Working Principle: In the initial preparation stage of cutting, the two boron carbide annular core blocks to be cut are placed on the outer top of the lower cover 1 and the outer top of the middle cavity 3, respectively. At this time, multiple fixing plates 2, which are equidistantly fixed around the lower cover 1, not only provide a stable support base for the entire fixture, but also play a role in fixing and guiding during the cutting process. The layout of the multiple fixing plates 2 ensures the stability of the fixture when placed on the wire cutting equipment. Multiple connecting blocks 5, which are equidistantly fixed around the outer periphery of the middle cavity 3, and the cutting guide strips 6 on them are in a standby state, ready to provide precise path guidance for cutting the molybdenum wire. Then, the upper cover 4 is placed on the middle cavity 3, so that the concentric positioning pins 12 on the left and right sides of the bottom of the upper cover 4 pass through and slide to connect the lower cover 1 and the top left and right sides of the middle cavity 3. This step is achieved by... The positioning pin 12 ensures the precise relative positions of the upper cover 4, the middle cavity 3, and the lower cover 1, allowing the annular core block to be accurately placed in the predetermined position. Then, the locking bolt 11 in the clamping mechanism is manually operated. The locking bolt 11 passes through the middle cavity 3 and is threaded into the middle of the inner bottom wall of the lower cover 1. When the locking bolt 11 is rotated clockwise, its top manual rotation component facilitates force application by the operator. As the locking bolt 11 rotates, the extrusion plate 10, located in and fixedly connected to the hidden groove 9 at the top of the upper cover 4, gradually moves downwards, applying uniform pressure to the annular core block placed on the lower cover 1 and the middle cavity 3, thereby firmly fixing the annular core block within the fixture, preventing displacement during cutting, and ensuring cutting accuracy. After fixing the annular core block, the... The fixture is installed on the wire cutting equipment, with one of the fixing plates 2 perpendicular to the direction of the cutting molybdenum wire. The cutting molybdenum wire is adjusted to align with the gap between the two cutting guide strips 6, thus determining the accurate starting cutting position for the cutting molybdenum wire and ensuring the accuracy and consistency of the cutting. The wire cutting equipment is started, and the cutting molybdenum wire begins to cut the annular core block along the precise path determined by the cutting guide strips 6. Due to the optimized design of the fixture structure, the equipment only needs to travel a relatively short distance to complete one cut. After completing one cut, the equipment is stopped, and the fixture is adjusted on the equipment so that the next fixing plate 2 is perpendicular to the cutting molybdenum wire and the cut is aligned again, ready for the next cut. This process is repeated until three cuts are completed, and the annular core block is cut. The core block is cut into three tile shapes. During each pivot point change, the annular core block remains in a precise position without displacement or loosening due to the combined action of the concentric positioning pin 12 and the clamping mechanism, ensuring the accuracy and consistency of each cut. After all cutting operations are completed, the product removal operation begins. First, the locking bolt 11 in the clamping mechanism is rotated counterclockwise. By manually rotating the assembly, force is applied to move the extrusion plate 10 upward, releasing the clamping state on the annular core block. Then, the concentric positioning pin 12 is pulled out, and the upper cover 4 is removed first. At this point, the three cut products located on the top outer side of the middle cavity 3 can be easily removed. Then, the middle cavity 3 is removed, and the remaining three products placed on the top outer side of the lower cover 1 are removed, completing the entire cutting operation process. Afterwards...The preparation, cutting, and finishing stages described above can be repeated until all production tasks are completed. Through this rigorous and orderly workflow, the boron carbide ring-shaped core wire EDM fixture, based on the fixed plate 2 as a fixed fulcrum, effectively improves cutting efficiency and product qualification rate, ensuring high-quality product production.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A boron carbide annular core wire cutting fixture, comprising a lower cover (1), characterized in that: The lower cover (1) is fixedly connected to a plurality of fixed plates (2) at equal intervals around its outer perimeter. The lower cover (1) has a central cavity (3) fitted at its top. The central cavity (3) has an upper cover (4) at its top. The central cavity (3) has a plurality of connecting blocks (5) fixedly connected to a plurality of connecting blocks (5) at equal intervals around its outer perimeter. Each of the plurality of connecting blocks (5) has two cutting guide strips (6) on the opposite side. The plurality of cutting guide strips (6) are connected to the central cavity (3) by a fixing assembly. The upper cover (4) has a pressing mechanism at its top. The pressing mechanism is used to press and fix the annular core block placed on the outer side of the top of the lower cover (1) and the outer side of the top of the central cavity (3). The pressing mechanism includes a pressing plate (10). The top of the upper cover (4) is provided with a hidden groove (9). The pressing plate (10) is provided inside the hidden groove (9). The bottom of the pressing plate (10) is fixedly connected with a locking bolt (11). The locking bolt (11) passes through the middle cavity (3) and is threaded to the middle of the inner bottom wall of the lower cover (1). The bottom left and right sides of the upper cover (4) are fixedly connected with concentric positioning pins (12). The two concentric positioning pins (12) pass through and slide on the top left and right sides of the lower cover (1) and the middle cavity (3). The top of the locking bolt (11) and the concentric positioning pins (12) are provided with manual rotation components.

2. The boron carbide annular core wire cutting fixture according to claim 1, characterized in that: The fixing assembly includes multiple fixing screws (8), and fixing grooves (7) are provided in the middle of the opposite side of the multiple cutting guides (6). The multiple fixing screws (8) pass through the multiple fixing grooves (7) and are threaded to the outside of the cavity (3).

3. The boron carbide annular core wire cutting fixture according to claim 1, characterized in that: The manual rotation assembly includes multiple hexagonal heads (13), which are respectively fixedly connected to the top of the locking bolt (11) and two concentric positioning pins (12). A knob ring (14) is fixedly connected to the top of each of the two hexagonal heads (13).

4. The boron carbide annular core wire cutting fixture according to claim 1, characterized in that: Each of the aforementioned fixing plates (2) has two mounting holes (15) on its top.

5. The boron carbide annular core wire EDM fixture according to claim 1, characterized in that: The angle between the plurality of fixing plates (2) is 120 degrees, and the plurality of connecting blocks (5) are respectively arranged between the adjacent fixing plates (2), and the angle between the adjacent connecting blocks (5) is 120 degrees.

6. The boron carbide annular core wire EDM fixture according to claim 3, characterized in that: The outer surface of the knob ring (14) is designed with a smooth shape.

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