Forming equipment for silicon carbide aluminum-based composite material

Abstract

The utility model relates to the technical field of powder metallurgy equipment, in particular to forming equipment for a silicon carbide aluminum-based composite material, which solves the problem that powder is easy to spray out between a female die and a bottom die in the prior art and comprises a support, a workbench and a cross beam are arranged on the support, a liftable male die is arranged on the cross beam, and a base is arranged on the workbench. A female die is placed on the base, and the male die is matched with the female die; a female die pressing assembly is arranged on the male die, and an oil film sealing structure is arranged between the female die and the base. The powder forming device has the advantages that in the powder forming process, the female die pressing assembly can press the female die, so that the female die is in close contact with the base, the resistance of powder passing through a gap between the female die and the base is increased, and the powder is prevented from passing through; besides, the gap between the female die and the base is blocked by the oil film sealing structure, so that the passing resistance of the powder is further increased, the powder is effectively prevented from being sprayed out from the gap between the female die and the base, and the powder is ensured to be pressed and formed.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy equipment, in particular to a forming device for silicon carbide aluminum matrix composite materials. Background Art

[0002] Silicon carbide particle reinforced aluminum matrix composites (SiCp / Al) have shown broad application prospects in the fields of aerospace, automobiles, advanced weapons, electronic packaging, etc. due to their excellent comprehensive properties such as low density, high specific stiffness, high wear resistance, low thermal expansion coefficient, high thermal conductivity, and good corrosion resistance. The macroscopic mechanical properties of the composite material depend on the microstructure and micro-deformation characteristics of the material. As the medium between the reinforcement and the matrix of the composite material, the interface can effectively transfer the load from the matrix to the reinforcement. At the same time, its bonding strength is also the link connecting the microscopic characteristics and macroscopic properties of the composite material interface. The interface bonding strength is affected by many factors, including the existence of stress, lattice matching, interface defects, etc. Therefore, exploring the interface bonding of composite materials has become an important issue that needs to be solved urgently. It is necessary to start from SiC / Al composite materials and conduct in-depth and systematic research on interface problems.

[0003] The patent with the publication number CN213266649U discloses a forming device for SiCp / Al composite materials, including: a hot pressing die, which includes an upper pressing head at the top, an annular female die in the middle, and a bottom die at the bottom. The upper pressing head, the female die, and the bottom die surround to form a middle cavity for placing the blank to be formed; a rapid heater is arranged around the outside of the hot pressing die for heating and insulating the hot pressing die; a press includes an upper workbench and a lower workbench arranged oppositely; the upper workbench is placed above the upper pressing head, and the lower workbench is placed at the bottom of the bottom die for providing axial pressure for the hot pressing die. When the forming device is in use, the upper pressing head presses the powder downward, and the powder is formed into a blank sample. However, during the pressing process, the powder is likely to spray out from the gap between the female die and the bottom die, resulting in the powder being unable to be formed. Summary of the Utility Model

[0004] The utility model provides a forming device for silicon carbide aluminum matrix composite materials, which solves the problem that the powder is likely to spray out from the gap between the female die and the bottom die in the prior art.

[0005] The technical solution of the utility model is realized as follows:

[0006] A forming device for a silicon carbide aluminum matrix composite material, comprising a bracket, on which a workbench and a cross beam are provided. A liftable punch is provided on the cross beam, and a base is provided on the workbench. A die is placed on the base, and the punch cooperates with the die; a die pressing assembly is provided on the punch, and an oil film sealing structure is provided between the die and the base. The lifting of the punch and the cooperation with the die realize the pressing of the powder, and thus realize the cold pressing forming of the powder; the die pressing assembly can effectively increase the bonding force between the die and the base. At the same time, the oil film sealing structure increases the resistance of the powder passing through the gap between the die and the base, blocks the powder from passing through the gap, and prevents the powder from spraying out from the gap between the die and the base; the oil film sealing assembly realizes the further sealing of the gap between the die and the base, and ensures the sealing performance between the die and the base.

[0007] The die pressing assembly includes an annular pressing plate. A liftable pressing plate is provided on the cross beam, and the punch is arranged on the pressing plate. The annular pressing plate is connected to the pressing plate through an elastic member; the annular pressing plate cooperates with the top surface of the die. When the punch descends and inserts into the die, the annular pressing plate presses the die, ensuring that the bottom of the die is in close contact with the base during the powder forming process, and preventing the powder from spraying out from the gap between the die and the base.

[0008] The oil film sealing structure includes an annular protrusion and an annular groove. The annular protrusion is arranged on the upper surface of the base, and the annular groove is arranged on the lower surface of the die. The annular protrusion cooperates with the annular groove, and sealing oil is provided between the annular protrusion and the annular groove. The cooperation of the annular protrusion and the annular groove can increase the path of the powder passing through the gap, thereby increasing the resistance received by the powder, blocking the powder from passing through the gap between the die and the base, and ensuring the sealing performance between the die and the base.

[0009] A plurality of annular protrusions are provided on the base, and the centers of the annular protrusions coincide; a plurality of annular grooves are provided on the die, and the centers of the annular grooves coincide. The plurality of annular protrusions and annular grooves act together.

[0010] The annular protrusion is an inclined surface protrusion, and the annular groove is an inclined groove, and the inclined surface protrusion cooperates with the inclined groove. The inclined surface protrusion and the inclined groove are convenient to process and can be directly made by turning, which is convenient for the manufacture of the die and the base.

[0011] The inclined surface protrusion inclines downward towards the center of the base. When the inclined surface protrusion cooperates with the inclined groove, the inclined surface protrusion applies a force towards the center to the lower part of the die, so that the lower part of the die is subjected to the effect of converging towards the center, and thus the die can bear a greater force, preventing the die from being damaged due to excessive pressure applied by the punch during powder forming.

[0012] A positioning boss is provided on the base, and the positioning boss cooperates with the through hole of the die. The cooperation between the positioning boss and the through hole ensures the accurate installation position of the die and the base.

[0013] A guiding column is provided between the workbench and the crossbeam, and the pressing plate is slidably matched with the guiding column. The guiding column guides the up-and-down sliding of the pressing plate to ensure the smooth movement of the pressing plate.

[0014] A telescopic hydraulic cylinder is provided on the crossbeam, and the telescopic hydraulic cylinder is connected to the pressing plate. The telescopic hydraulic cylinder can drive the pressing plate to move and can apply pressure through the pressing plate and the punch.

[0015] A chamfer is provided at the upper end of the through hole of the female mold. The chamfer facilitates the insertion of the punch into the female mold, avoids knocking between the punch and the female mold during powder molding, and avoids damage to the female mold or the punch.

[0016] The beneficial effects of the present utility model are as follows: during the powder molding process, the female mold pressing assembly can press the female mold to make the female mold in close contact with the base, increasing the resistance of the powder passing through the gap between the female mold and the base and blocking the powder from passing through; in addition, the oil film sealing structure seals the gap between the female mold and the base, further increasing the resistance of the powder passing through, effectively avoiding the powder from spraying out through the gap between the female mold and the base, and ensuring the compression molding of the powder.

[0017] The annular protrusion is an inclined surface protrusion, and the inclined surface protrusion slopes downward towards the center of the base. The inclined surface protrusion can apply a force towards the center to the lower part of the female mold. When the punch presses the powder, the powder will generate a lateral outward force on the inner wall of the female mold. During the cold pressing molding of the powder, the force generated by the inclined surface protrusion will offset part of the force generated by the powder on the female mold, so that the female mold can withstand a greater force and avoid damage to the female mold caused by excessive pressure applied by the punch during powder molding. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a forming device for a silicon carbide aluminum matrix composite material of the present utility model.

[0020] Figure 2 It is Figure 1 An enlarged schematic diagram at position A in

[0021] In the figure: 1, workbench; 2, guiding column; 3, pressing plate; 4, telescopic hydraulic cylinder; 5, crossbeam; 6, compression spring; 7, annular pressing plate; 8, punch; 9, female mold; 10, base; 11, positioning boss; 12, annular protrusion; 13, annular groove. Detailed Embodiments

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Embodiment 1, as Figure 1 shown, a forming device for a silicon carbide aluminum matrix composite material includes a bracket, on which a workbench 1 and a cross beam 5 are provided. A liftable punch 8 is provided on the cross beam 5. A base 10 is provided on the workbench 1, and a die 9 is placed on the base 10. The punch 8 cooperates with the die 9. A die pressing assembly is provided on the punch 8, and an oil film sealing structure is provided between the die 9 and the base 10. When the forming device is in use, the powder of the silicon carbide aluminum matrix composite material is loaded into the die 9, and then the punch 8 descends and inserts into the die 9. The punch 8, the die 9 and the base 10 cooperate together to cold press the powder to realize powder forming. The die pressing assembly can effectively increase the bonding force between the die 9 and the base 10. At the same time, the oil film sealing structure increases the resistance of the powder passing through the gap between the die 9 and the base 10, blocks the powder from passing through the gap, and avoids the powder from spraying out through the gap between the die 9 and the base 10. The oil film sealing assembly realizes further sealing of the gap between the die 9 and the base 10 to ensure the sealing performance between the die 9 and the base 10.

[0024] Furthermore, the die pressing assembly includes an annular pressing plate 7. A liftable pressing plate 3 is provided on the cross beam 5, and the punch 8 is arranged on the pressing plate 3. The annular pressing plate 7 is connected to the pressing plate 3 through an elastic member. The annular pressing plate 7 cooperates with the top surface of the die 9. The elastic member is a compression spring 6. When the punch 8 descends and inserts into the die 9, the annular pressing plate 7 presses the die 9 under the action of the compression spring 6 to ensure that the bottom of the die 9 is in close contact with the base 10 during the powder forming process and avoid the powder from spraying out through the gap between the die 9 and the base 10.

[0025] Furthermore, a positioning boss 11 is provided on the base 10, and the positioning boss 11 cooperates with the through hole of the die 9. The cooperation between the positioning boss 11 and the through hole ensures the accurate installation position of the die 9 and the base 10.

[0026] Furthermore, a guiding column 2 is provided between the workbench 1 and the cross beam 5, and the pressing plate 3 is in sliding cooperation with the guiding column 2. The guiding column 2 guides the up and down sliding of the pressing plate 3 to ensure the smooth movement of the pressing plate 3.

[0027] Furthermore, a telescopic hydraulic cylinder 4 is provided on the cross beam 5, and the telescopic hydraulic cylinder 4 is connected to the pressing plate 3. The telescopic hydraulic cylinder 4 can drive the pressing plate 3 to move and can apply pressure through the pressing plate 3 and the punch 8.

[0028] Furthermore, a chamfer is provided at the upper end of the through hole of the female mold 9. The chamfer facilitates the insertion of the male mold 8 into the female mold 9, avoiding collisions between the male mold 8 and the female mold 9 during powder molding and preventing damage to the female mold 9 or the male mold 8.

[0029] Embodiment 2: On the basis of Embodiment 1, a forming device for a silicon carbide aluminum matrix composite material, as Figure 2 shown, the oil film sealing structure includes an annular protrusion 12 and an annular groove 13. The annular protrusion 12 is provided on the upper surface of the base 10, and the annular groove 13 is provided on the lower surface of the female mold 9. The annular protrusion 12 and the annular groove 13 cooperate with each other. The cooperation of the annular protrusion 12 and the annular groove 13 can increase the path of the powder passing through the gap, thereby increasing the resistance of the powder and blocking the powder from passing through the gap between the female mold 9 and the base 10, ensuring the sealing performance between the female mold 9 and the base 10.

[0030] Furthermore, a plurality of annular protrusions 12 are provided on the base 10, and the centers of the respective annular protrusions 12 coincide; a plurality of annular grooves 13 are provided on the female mold 9, and the centers of the respective annular grooves 13 coincide. In this embodiment, the number of the annular protrusions 12 and the annular grooves 13 is three, and the annular protrusions 12 and the annular grooves 13 correspond to each other one by one. The cooperation of multiple groups of annular protrusions 12 and annular grooves 13 increases the reliability of the seal.

[0031] Furthermore, the annular protrusion 12 is an inclined surface protrusion, and the annular groove 13 is an inclined groove, and the inclined surface protrusion and the inclined groove cooperate with each other. The inclined surface protrusion and the inclined groove are convenient to process and can be directly manufactured by turning, which is convenient for the manufacture of the female mold and the base.

[0032] Furthermore, the inclined surface protrusion inclines downward toward the center of the base 10. When the inclined surface protrusion cooperates with the inclined groove, the inclined surface protrusion can apply a force toward the center to the lower part of the female mold 9. When the male mold 8 presses down the powder, the powder will generate a lateral outward force on the inner wall of the female mold 9. During powder cold pressing forming, the force generated by the inclined surface protrusion will offset part of the force applied by the powder to the female mold 9, thereby enabling the female mold 9 to withstand a greater force and preventing damage to the female mold caused by excessive pressure applied by the male mold during powder molding.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A molding device for a silicon carbide aluminum-based composite material, comprising a bracket, on which a workbench (1) and a crossbeam (5) are provided, characterized in that: A convex die (8) that can be raised and lowered is provided on the crossbeam (5), a base (10) is provided on the workbench (1), a concave die (9) is placed on the base (10), and the convex die (8) cooperates with the concave die (9); a concave die clamping assembly is provided on the convex die (8), and an oil film sealing structure is provided between the concave die (9) and the base (10).

2. The molding equipment of silicon carbide aluminum-based composite material according to claim 1, characterized in that: The die pressing assembly comprises an annular pressing plate (7), a lifting and lowering pressing plate (3) is provided on the cross beam (5), a punch (8) is arranged on the pressing plate (3), and the annular pressing plate (7) is connected to the pressing plate (3) via an elastic member; the annular pressing plate (7) is matched with the top surface of the die (9).

3. The molding equipment of silicon carbide aluminum-based composite material according to claim 1 or 2, characterized in that: The oil film sealing structure comprises an annular protrusion (12) and an annular groove (13); the annular protrusion (12) is arranged on the upper surface of the base (10), the annular groove (13) is arranged on the lower surface of the die (9), the annular protrusion (12) cooperates with the annular groove (13), and sealing oil is provided between the annular protrusion (12) and the annular groove (13).

4. The molding equipment of silicon carbide aluminum-based composite material according to claim 3, characterized in that: A plurality of annular protrusions (12) are provided on the base (10), and the centers of the circles of the annular protrusions (12) coincide with each other; a plurality of annular grooves (13) are provided on the die (9), and the centers of the circles of the annular grooves (13) coincide with each other.

5. The molding equipment of silicon carbide aluminum-based composite material according to claim 4, characterized in that: The annular protrusion (12) is an inclined surface protrusion, and the annular groove (13) is an inclined groove, and the inclined surface protrusion cooperates with the inclined groove.

6. The molding equipment of silicon carbide aluminum-based composite material according to claim 5, characterized in that: The inclined projection is inclined downwardly toward the center of the base (10).

7. The molding equipment of the silicon carbide aluminum-based composite material according to any one of claims 1, 2, 4 to 6, characterized in that: A positioning boss (11) is provided on the base (10), and the positioning boss (11) cooperates with the through hole of the die (9).

8. The molding equipment of silicon carbide aluminum-based composite material according to claim 7, characterized in that: A guide column (2) is provided between the workbench (1) and the crossbeam (5), and the pressure plate (3) is slidably engaged with the guide column (2).

9. The molding equipment of silicon carbide aluminum-based composite material according to claim 8, characterized in that: A telescopic hydraulic cylinder (4) is provided on the crossbeam (5), and the telescopic hydraulic cylinder (4) is connected to the pressing plate (3).

10. The molding equipment of silicon carbide aluminum-based composite material according to claim 9, characterized in that: The upper end of the through hole of the die (9) is provided with a chamfer.

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