Ceramic slag slurry pump impeller compression molding device and molding process

Abstract

The application relates to the technical field of forming equipment, and provides a ceramic slag slurry pump impeller compression forming device and a forming process.The ceramic slag slurry pump impeller compression forming device comprises a rack; a forming die is arranged on the rack; the forming die comprises a die shell, an upper die plate and a lower die plate which are respectively slidably arranged at the upper end and the lower end of the die shell, and a plurality of wedge blocks located in the die shell; the number of linear driving elements is two, and the linear driving elements are arranged above and below the forming die respectively; and the forming die is configured to, after the die shell is filled with ceramic powder, simultaneously push the upper die plate and the lower die plate by the two linear driving elements to compress the ceramic powder in the die shell from the upper and lower directions. The ceramic slag slurry pump impeller compression forming device provided by the application pushes the upper die plate and the lower die plate of the forming die in two directions by the two linear driving elements, so that the extrusion force received by the ceramic powder in the forming die is more uniform, and the forming quality of the impeller is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forming equipment, in particular to a ceramic slurry pump impeller press forming device and a forming process. BACKGROUND

[0002] In the industrial fields of mining, metallurgy, building materials, etc., ceramic slurry pumps have become key equipment for transporting high-concentration and high-abrasive slurry due to their excellent wear resistance and corrosion resistance. The impeller, as the core flow component of the ceramic slurry pump, directly determines the conveying efficiency, service life, and running stability of the pump.

[0003] Currently, ceramic slurry pump impellers are mainly divided into open impellers, semi-open impellers, and closed impellers according to their structural forms. Among them, closed impellers have the most widespread application in high-pressure and high-concentration slurry conveying scenarios because of their integrated structure of front and rear cover plates and blades, which can effectively reduce liquid backflow loss during conveying, improve hydraulic efficiency, and enhance the overall impact and wear resistance of the impeller through the synergistic effect of the blades and cover plates. To ensure the integrated structure of the closed impeller, when the impeller is made of ceramic material, the powder press forming method is usually used to form the impeller blank for further subsequent processing.

[0004] The press forming of ceramic impellers requires a mold to shape the blank, and the closed flow passage cavity is formed between the front and rear cover plates of the closed impeller. The blades are usually twisted and arc-shaped structures and seamlessly connected to the cover plates, which requires the mold to be designed as a complex cavity that completely matches the shape of the flow passage cavity and the blades. However, common press forming equipment usually only applies pressure to the mold from one side, which is sufficient for simple-shaped parts such as cover plates, metal blocks, and straight gears. However, for complex-shaped impellers, the forming quality of the cover plate on one side is better, especially for large-sized impellers, the structure near the cover plate on the other side is prone to quality defects. SUMMARY

[0005] To overcome the above-mentioned defects, the embodiments of the present application provide a ceramic slurry pump impeller press forming device and a forming process, which solve the technical problem of quality defects in the related art when producing large-sized impellers through press forming.

[0006] According to one aspect, at least one embodiment of the present application provides a ceramic slurry pump impeller press forming device, comprising:

[0007] a rack;

[0008] A forming die is arranged on the frame, and the forming die comprises a die shell, an upper die plate and a lower die plate respectively slidingly arranged at the upper and lower ends of the die shell, and a plurality of wedge blocks arranged in the die shell, and a forming space of an impeller blade is formed between two adjacent wedge blocks;

[0009] Two linear driving members are arranged above and below the forming die respectively, and the forming die is configured to, after the die shell is filled with ceramic powder, the upper die plate and the lower die plate are simultaneously pushed by the two linear driving members to press the ceramic powder in the die shell from the upper and lower directions.

[0010] For example, in the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application, a plurality of through grooves are arranged in the side wall of the die shell, the number of the through grooves corresponds to the number of the wedge blocks, the wedge blocks are inserted into the through grooves, and a limiting groove for abutting against the end of the wedge block is arranged on the side of the through groove away from the center of the die shell.

[0011] For example, in the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application, the wedge block comprises:

[0012] A connecting body is inserted into the through groove;

[0013] A supporting portion is arranged on the lower die plate, and the other end of the supporting portion is used for supporting the end of the connecting body;

[0014] A filling block is arranged on the upper end surface of the supporting portion, and the filling block is smoothly connected with the supporting portion and the connecting body.

[0015] For example, in the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application, the connecting body comprises a first body and a second body which are arranged in a splicing manner, the first body and the second body are both inserted into the through groove, the second body is provided with a supporting table on the side away from the center of the die shell, the supporting table is used for supporting the first body, and the supporting portion is used for supporting the end of the second body.

[0016] For example, in the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application, the first body and the second body both comprise an upper layer plate and a lower layer plate, the upper layer plate and the lower layer plate are both provided with an insertion slot, and the wedge block further comprises a connecting piece, and the two ends of the connecting piece are respectively inserted into two adjacent insertion slots.

[0017] For example, the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application comprises a forming mold, a mold shell, a wedge block, an upper mold core, a lower mold core, an upper mold plate and a lower mold plate.

[0018] For example, the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application comprises a forming mold, a mold shell, a wedge block, an upper mold core, a lower mold core, an upper mold plate and a lower mold plate.

[0019] For example, the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application comprises a forming mold, a mold shell, a wedge block, an upper mold core, a lower mold core, an upper mold plate and a lower mold plate.

[0020] For example, the ceramic slurry pump impeller press forming device provided by at least one embodiment of the present application comprises a forming mold, a mold shell, a wedge block, an upper mold core, a lower mold core, an upper mold plate and a lower mold plate.

[0021] The telescopic member is arranged on the rack.

[0022] The pressing plate is arranged at the telescopic end of the telescopic member, and is used for pressing the moving table.

[0023] According to another aspect, at least one embodiment of the present application also provides a ceramic slurry pump impeller press forming process, which uses the ceramic slurry pump impeller press forming device described above and comprises the following steps:

[0024] S1, filling: ceramic powder is filled into the forming mold and is uniformly distributed in the forming mold;

[0025] S2, press forming: the upper mold plate and the lower mold plate of the forming mold are respectively pushed by the linear driving members, and the forming mold is extruded from both sides.

[0026] S3, demolding: after forming, the blank body of the impeller is taken out of the forming mold.

[0027] The present application has the following beneficial effects:

[0028] In the present application, two linear driving members are arranged above and below the forming die respectively, which can simultaneously apply driving force to the upper die plate and the lower die plate to form a bidirectional pressing mode. Compared with the unilateral pressing mode in the prior art, the bidirectional pressing can make the ceramic powder in the die shell receive uniform pressure in the upward and downward directions, especially for large-size impeller blanks, the structures near the upper die plate and the lower die plate on both sides can obtain sufficient forming pressure, effectively avoiding the quality defects such as insufficient density, cracks and missing corners of the structure far away from the driving end side in the prior art unilateral pressing mode, and improving the consistency of the overall forming quality of the impeller blank. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some example embodiments of the present application. For those skilled in the art, other drawings can be obtained according to the contents of the example embodiments of the present application and the drawings without any creative labor.

[0030] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a ceramic slag slurry pump impeller pressing forming device according to an embodiment of the present application;

[0031] Figure 2 FIG. 2 is a schematic diagram of the structure of a forming die according to an embodiment of the present application; Figure 1

[0032] Figure 3 FIG. 3 is a schematic diagram of the cross-sectional view of A-A according to an embodiment of the present application; Figure 2

[0033] Figure 4 FIG. 4 is a schematic diagram of the local structure of a forming die according to an embodiment of the present application; Figure 1

[0034] Figure 5 FIG. 5 is a schematic diagram of the enlarged structure at A according to an embodiment of the present application; Figure 4

[0035] Figure 6 FIG. 6 is a schematic diagram of another angle of the local structure of a forming die according to an embodiment of the present application; Figure 1

[0036] Figure 7 FIG. 7 is a schematic diagram of the structure of a wedge according to an embodiment of the present application; Figure 1

[0037] Figure 8 FIG. 8 is a schematic diagram of another angle of the structure of a wedge according to an embodiment of the present application; Figure 1

[0038] Figure 9 FIG. 9 is a front view of a wedge according to an embodiment of the present application; Figure 1 ​​​​​​​​

[0039] Figure 10 Fig. 1 is a schematic view of a structure of a first body of a forming die according to an embodiment of the present application; Figure 1

[0040] Figure 11 Fig. 2 is a schematic view of another angle of the structure of the first body of the forming die according to the embodiment of the present application; Figure 1

[0041] Figure 12 Fig. 3 is a schematic view of a structure of a second body of the forming die according to the embodiment of the present application; Figure 1

[0042] Figure 13 Fig. 4 is a schematic view of a structure of a filling block of the forming die according to the embodiment of the present application; Figure 1

[0043] Figure 14 Fig. 5 is a schematic view of a structure of a support part of the forming die according to the embodiment of the present application; Figure 1

[0044] Figure 15 Fig. 6 is a schematic view of an enlarged structure at B in Fig. 5; Figure 14

[0045] Figure 16 Fig. 7 is a schematic view of another angle of the structure of the support part of the forming die according to the embodiment of the present application. Figure 1 Fig. 8 is a schematic view of a structure of a forming die according to another embodiment of the present application.

[0046] In the figure: 100, a rack; 200, a forming die; 210, a die shell; 211, a through slot; 212, a limiting slot; 220, an upper die plate; 230, a lower die plate; 240, a wedge block; 241, a connecting body; 2411, a first body; 2412, a second body; 2413, a supporting table; 2414, an upper layer plate; 2415, a lower layer plate; 2416, a slot; 2417, a positioning hole; 242, a support part; 2421, a split block; 243, a filling block; 244, a connecting piece; 250, an upper die core; 260, a lower die core; 270, a positioning rod; 271, a shearing ring; 300, a linear driving piece; 400, a moving assembly; 410, a moving table; 500, a pressing assembly; 510, a telescopic piece; 520, a pressing plate. DETAILED DESCRIPTION

[0047] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and are not a limitation of the present application.

[0048] ​​​​​​For the purpose of clarity, only the parts of the apparatus that are pertinent to the invention are shown in the drawings, and they do not necessarily show the actual configuration of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled. In this document, "one" means not only "only one", but also "more than one", and "several" includes "two" and "more than two".

[0049] In this document, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0050] In the present invention, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The "lower", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0051] In the description of the present embodiment, the orientation or position relationship of the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] As Figure 1As shown, it shows a ceramic slurry pump impeller compression molding device in an embodiment of the application, comprising a rack 100, a molding die 200 and a linear drive 300. The rack 100 is provided with a moving assembly 400 and a pressing assembly 500. The moving assembly 400 includes a guide rail and a moving table 410, the guide rail is fixed on the rack 100 and extends in the horizontal direction, the moving table 410 is in sliding fit with the guide rail, the moving table 410 is used for installing the bottom plate of the molding die 200, the moving assembly 400 further includes a drive element arranged on the rack 100, which drives the moving table 410 to move. The pressing assembly 500 includes a telescopic element 510 and a pressing plate 520, the telescopic element 510 is fixed on the rack 100, the telescopic end thereof is located above the moving table 410, the telescopic end of the telescopic element 510 extends upward, the pressing plate 520 is fixed on the telescopic end of the telescopic element 510, the lower end surface of the pressing plate 520 is provided with a pressing surface matched with the upper end surface of the moving table 410, which is used for pressing the moving table 410. The rack 100 is divided into two stations by moving the molding die 200 with the moving table 410, i.e. a compression station and a demolding station, two linear drives 300 are arranged on the rack 100 in opposite directions, the compression station is between the two linear drives 300, the molding die 200 can complete the feeding and compression process of the ceramic powder in the compression station, the other side of the compression station is the demolding station, after the compression is completed, the moving table 410 moves into the demolding station, and the molded blank completes demolding in the demolding station.

[0054] The drive element drives the moving table 410 to slide along the guide rail to the compression station where the molding die 200 is aligned with the linear drive 300; the telescopic element 510 of the pressing assembly 500 is started to make the telescopic end of the telescopic element 510 extend out, drive the pressing plate 520 to move downward, until the pressing surface of the pressing plate 520 is in contact with the upper end surface of the moving table 410 and exerts pressure, so as to fix the moving table 410 in the compression station; then the ceramic powder filling and compression molding process is carried out; after the compression molding is completed, the telescopic element 510 is started to drive the pressing plate 520 to move upward and away from the moving table 410, and then the drive element drives the moving table 410 to slide along the guide rail to the demolding station for demolding operation. By arranging two adjacent stations, the molding die 200 is prevented from being placed below the linear drive 300 during demolding, thereby reducing the safety risk of the operator. When the moving table 410 drives the molding die 200 to enter the demolding station, the linear drive 300 below the molding die 200 also enters the demolding station, at this time, the telescopic element 510 is elongated and can push the lower die plate 230 upward, so as to push out the molded blank from the molding die 200 and assist demolding.

[0055] As a parallel technical solution, the guide rail of the moving component 400 can be replaced with a roller structure, as long as it can realize the horizontal movement of the moving platform 410; the number of pressing components 500 can be set to multiple, distributed along the circumference of the moving platform 410, as long as they can evenly press the moving platform 410 and do not affect the movement of the moving platform 410 when it needs to move.

[0056] Reference Figures 2-3 , Figure 6 The molding die 200 includes a mold shell 210, an upper template 220, a lower template 230, and several wedges 240. The mold shell 210 is a hollow structure with an installation plate connected to its outer side wall. The molding die 200 can be fixed on the moving table 410 through the installation plate. Both the upper and lower ends of the mold shell 210 are open structures. The upper template 220 and the lower template 230 are respectively set at the upper and lower ends of the mold shell 210. The edge of the upper template 220 slides with the upper end of the mold shell 210, and the edge of the lower template 230 slides with the lower end of the mold shell 210, so that the upper template 220 can move up and down along the upper end of the mold shell 210, and the lower template 230 can move up and down along the lower end of the mold shell 210. Several wedges 240 are located within the hollow cavity of the mold shell 210. The wedges 240 are evenly spaced along the circumference of the mold shell 210. Each wedge 240 has two side walls that are arc-shaped to match the shape of the impeller blades. The arc-shaped surfaces of adjacent wedges 240 are positioned opposite each other, forming a forming space for shaping the impeller blades. There is a gap between the upper end face of the wedge 240 and the lower surface of the upper mold plate 220, and a gap between the lower end face of the wedge 240 and the upper surface of the lower mold plate 230, thus providing forming space for the two cover plates of the impeller. (Refer to...) Figures 4-5 The mold shell 210 has several through slots 211 on its side wall. The number of through slots 211 corresponds to the number of wedges 240 and they are evenly distributed along the circumference of the mold shell 210. The cross-sectional shape of the through slots 211 matches the shape of the end of the wedge 240. A limiting groove 212 is provided on the side of the through slot 211 away from the center of the mold shell 210. The limiting groove 212 is used to abut against the end of the wedge 240. The through slots 211 and the limiting groove 212 improve the support and positioning of the wedge 240, ensuring the accurate position of the wedge 240. The limiting groove 212 of the through slot 211 abuts against the end of the wedge 240, limiting the depth of the wedge 240 into the inner cavity of the mold shell 210. This ensures that the extension length of several wedges 240 along the circumference of the mold shell 210 is consistent, thereby ensuring that the blade forming space size composed of adjacent wedges 240 is uniform. This solves the problem of blade shape deviation caused by inaccurate positioning of the wedges 240 in existing molds and improves the forming accuracy of impeller blades.

[0057] The number of linear driving members 300 is two, one of which is arranged above the forming die 200, and is fixedly connected with the upper part of the rack 100 through a support, with the telescopic end extending downward and being detachably connected with the upper surface of the upper die plate 220; the other is arranged below the forming die 200, and is fixedly connected with the lower part of the rack 100, with the telescopic end extending upward and being detachably connected with the lower surface of the lower die plate 230.

[0058] In this embodiment, when the impeller is pressed, the forming die 200 is first assembled, a plurality of wedge blocks 240 are placed in the hollow cavity of the mold shell 210 in a circumferentially uniform and spaced manner, so that adjacent wedge blocks 240 form a blade forming space, then the lower die plate 230 is assembled to the lower end of the mold shell 210, the forming die 200 is brought into the pressing station by the moving table 410, then the hollow cavity of the mold shell 210 is filled with ceramic powder, and the ceramic powder is uniformly distributed in the inner cavity of the mold shell 210, the blade forming space and the area between the upper die plate 220 and the lower die plate 230 by vibrating the mold shell 210 during the filling process; after the filling is completed, the upper die plate 220 is installed at the upper end of the mold shell 210 or the upper die plate 220 is directly installed on the telescopic end of the linear driving member 300 arranged above, and the upper die plate 220 installed on the telescopic end of the linear driving member 300 arranged above is taken as an example for description. Start the two linear driving members 300, and the telescopic ends of the two linear driving members 300 extend out at the same time, the upper linear driving member 300 pushes the upper die plate 220 to move downward along the upper end of the mold shell 210, and the lower linear driving member 300 pushes the lower die plate 230 to move upward along the lower end of the mold shell 210, so as to apply pressure to the ceramic powder in the mold shell 210 from the upper and lower directions; when the pressure reaches the preset value, the pressure is maintained for a period of time to complete the pressure maintaining process; after the pressure maintaining is completed, the telescopic ends of the two linear driving members 300 are controlled to retract, the upper linear driving member 300 drives the upper die plate 220 to move upward and separate from the mold shell 210, and the lower linear driving member 300 no longer pushes the lower die plate 230, thus completing the pressing and forming of the ceramic slurry pump impeller. The moving table 410 is moved again to bring the forming die 200 into the demolding station, and the operator can pull out the wedge blocks 240 in the mold shell 210 at this position, and then the blank in the mold shell 210 is pushed out by the lower telescopic member 510.

[0059] As a parallel technical solution, the arrangement of the wedge 240 can be adjusted according to the number of impeller blades. Several wedges 240 can be arranged non-uniformly in the circumferential direction of the mold shell 210, as long as the two adjacent wedges 240 can form a molding space matching the shape of the target impeller blade. Correspondingly, the position of the through groove 211 also needs to be adjusted according to the position and number of the wedges 240 to meet the positioning and support requirements of the wedges 240. The connection mode of the linear driving member 300 and the upper mold plate 220 and the lower mold plate 230 can be replaced by fixed connection, such as welding to realize the connection between the extension end of the linear driving member 300 and the upper mold plate 220 and the lower mold plate 230, as long as the driving force can be transmitted. As shown in FIG. Figure 3 The linear driving member 300 can transmit pressure to the lower mold plate 230 through the push plate located below the mold shell 210, so that the pressing force covers the lower mold plate 230 as evenly as possible, ensuring that the pressing pressure can uniformly act on the ceramic powder. The blade molding space formed by several wedges 240 directly realizes the shape setting of the closed impeller twisted arc blade, solving the problem that the existing mold is difficult to match the complex structure of the blade, and providing protection for the molding of the impeller blade.

[0060] Two linear driving members 300 are arranged above and below the molding mold 200, which can simultaneously apply driving force to the upper mold plate 220 and the lower mold plate 230 to form a bidirectional pressing mode. Compared with the unilateral pressing mode in the prior art, the bidirectional pressing mode can make the ceramic powder in the mold shell 210 receive uniform pressure in both upward and downward directions. Especially for large-size impeller blanks, the structures on both sides close to the upper mold plate 220 and the lower mold plate 230 can obtain sufficient molding pressure, effectively avoiding the quality defects such as insufficient density, cracks, and missing corners on the side away from the driving end in the unilateral pressing mode of the prior art, and improving the consistency of the overall molding quality of the impeller blank.

[0061] The wedge 240 ensures the accuracy of the blade molding space, so that the shape of the impeller blade meets the design requirements; the bidirectional pressing ensures that the ceramic powder is fully densified in the molding space, improving the density of the blank. This synergistic effect not only makes the shape precision of the molded impeller blank meet the standards, but also makes the overall structure uniform, providing a good foundation for subsequent sintering and other processing procedures, thereby improving the impact resistance and wear resistance of the final ceramic impeller, and prolonging the service life of the ceramic slurry pump.

[0062] In addition, in the bidirectional pressing mode, the two linear driving members 300 jointly bear the pressing pressure. Compared with the unilateral pressing mode, in which a single driving member needs to provide greater pressure to ensure the molding quality of the far end, the present device can reduce the pressure load of a single linear driving member 300, reduce the wear of a single driving member, and improve the service life and operating stability of the device as a whole. At the same time, the lower load requirement of a single driving member can reduce the requirement for the performance of the driving member, and reduce the manufacturing cost of the equipment.

[0063] Referring toFigures 7-16 The wedge block 240 includes a connecting body 241, a support part 242, a filling block 243, and a connector 244. The connecting body 241 is inserted into the through groove 211 and is composed of a first body 2411 and a second body 2412. Both the first body 2411 and the second body 2412 are inserted into the through groove 211. The second body 2412 has a support platform 2413 on the side away from the center of the mold shell 210. The support platform 2413 is used to support the first body 2411. Both the first body 2411 and the second body 2412 include an upper plate 2414 and a lower plate 2415. The splicing surfaces of the upper plate 2414 and the lower plate 2415 are provided with slots 2416. The two ends of the connector 244 are respectively inserted into two adjacent slots 2416 to fix the first body 2411 and the second body 2412. The support portion 242 is disposed on the lower template 230. For ease of disassembly, in this embodiment, the end of the support portion 242 simply abuts against the lower template 230. For example... Figure 14 As shown, the support part 242 is composed of several sequentially abutting split blocks 2421, and adjacent split blocks 2421 are connected by the cooperation of bosses and grooves.

[0064] In this embodiment, the connecting body 241 of the wedge block 240 is made by splicing a first body 2411 and a second body 2412. Compared with the integral wedge block 240, the processing difficulty of the twisted arc surface can be reduced, and it is easier to process the sidewall that precisely matches the shape of the impeller blade. The support platform 2413 of the second body 2412 provides support for the first body 2411. With the fixing method of the connector 244 being inserted into the slot 2416, the separation of the first body 2411 and the second body 2412 during the pressing process can be effectively avoided, thereby enhancing the structural stability of the connecting body 241.

[0065] Furthermore, one end of the support portion 242 is used to support the end of the second main body 2412, and positioning holes 2417 are provided at the overlap between the second main body 2412 and the support portion 242. A positioning rod 270 is inserted into the positioning hole 2417, and a shearing ring 271 is provided on the outer wall of the positioning rod 270. The shearing ring 271 is located at the overlap surface between the second main body 2412 and the support portion 242. A filling block 243 is provided on the upper end surface of the support portion 242. The two sides of the filling block 243 smoothly transition with the upper end surface of the support portion 242 and the side wall of the connecting body 241, respectively, filling the gap between the support portion 242 and the connecting body 241. (Refer to...) Figure 9 To ensure the accurate positioning of the entire wedge block 240 within the mold shell 210, the end of the support portion 242 protrudes outward from the end faces of the first main body 2411 and the second main body 2412, thereby enabling it to abut against the lower mold plate 230.

[0066] The wedge blocks 240 are distributed along the circumferential direction of the mold shell 210, and the two side walls (arc surfaces) of two adjacent wedge blocks 240 are oppositely arranged to form a molding space of an impeller blade; the end of the wedge block 240 close to the center of the mold shell 210 abuts against the lower mold core 260, the lower mold core 260 is arranged at the bottom of the inner cavity of the mold shell 210, the upper mold core 250 is inserted into the lower mold core 260, the lower mold plate 230 is slidingly connected with the lower mold core 260, the upper mold plate 220 is slidingly connected with the upper mold core 250, and the upper mold core 250 and the lower mold core 260 cooperatively form a molding space of a center hole of the impeller.

[0067] The split block 2421 of the support part 242 is designed, which not only facilitates adjusting the length of the support part 242 according to the size of the mold shell 210, but also quickly separates the support part 242 from the blank by disassembling the split block 2421 during demolding, so as to avoid damaging the blank during demolding; the filling block 243 fills the gap between the support part 242 and the connecting main body 241, so as to ensure the smoothness of the inner wall of the impeller flow passage, avoid the concave surface of the blank due to the gap, and improve the surface quality of the blank. Meanwhile, the two ends of the wedge block 240 are stably supported through the through groove 211 and the support part 242, the two sides of the plurality of support parts 242 are sequentially abutted around the circumferential direction of the lower mold core 260, so as to avoid the change of the position of the wedge block 240 during the vibration and uniform distribution process, and improve the molding quality of the impeller. The positioning hole 2417 at the lap joint position of the second main body 2412 and the support part 242 cooperates with the positioning rod 270, which can accurately position the relative position of the two, so as to avoid the deformation of the blade molding space due to the misalignment of the two during pressing; the shearing ring 271 of the positioning rod 270 is designed, so that the second main body 2412 can be quickly taken out by shearing the shearing ring 271 during demolding, and the demolding operation is simplified; the insertion cooperation of the upper mold core 250 and the lower mold core 260 realizes the integrated molding of the center hole of the impeller, without the need of additional drilling processing after pressing molding, reduces the process steps, and avoids the damage to the structure of the blank during subsequent processing.

[0068] In this embodiment, when assembling the forming mold 200, first, the second body 2412 is inserted into the through slot 211 of the mold shell 210 and the end of the second body 2412 abuts against the limiting slot 212, then the first body 2411 is inserted into the inner cavity of the mold shell 210 through the through slot 211, the end of the first body 2411 located in the mold shell 210 is placed on the supporting table 2413 of the second body 2412, the splicing surface of the first body 2411 and the second body 2412 is attached, then the connecting piece 244 is inserted into the insertion slot 2416 of the first body 2411 and the second body 2412; then the split blocks 2421 of the supporting part 242 are sequentially inserted and connected to form a complete supporting part 242, which is placed on the lower mold plate 230, at the same time, the positioning rod 270 is inserted into the positioning hole 2417 of the supporting part 242, and as the lower mold plate 230 slides into the mold shell 210, the positioning rod 270 also enters the positioning hole 2417 of the second body 2412; then the filling block 243 is installed, so that the filling block 243 smoothly transitions with the supporting part 242 and the connecting body 241; finally, the upper mold core 250 and the lower mold core 260 are inserted, that is, the preliminary assembly of the forming mold 200 is completed. In the filling stage, the inner cavity of the mold shell 210 is filled with ceramic powder, and the mold shell 210 is vibrated during the filling process, so that the ceramic powder is uniformly distributed in the blade forming space, the center hole forming space and the gaps between the components. In the compression forming stage, the two linear driving members 300 are started to push the upper mold plate 220 to move downward along the upper mold core 250 and the lower mold plate 230 to move upward along the lower mold core 260, so as to apply pressure to the ceramic powder from the upper and lower directions, and the pressure is maintained for a period of time after reaching the preset pressure. Subsequently, the linear driving member 300 is controlled to drive the upper mold plate 220 to separate from the mold shell 210, the moving table 410 drives the forming mold 200 to enter the demolding stage, the first body and the second body 2412 are sequentially extracted, in the process of extracting the second body 2412, the positioning rod 270 is sheared at the position of the shearing ring 271, the filling block 243 and the supporting part 242 are sequentially extracted from the through slot 211 by the clamp, the lower mold plate 230 is ejected by the linear driving member 300, and finally the impeller blank is taken out. Since the supporting part 242 and the lower mold plate 230 are not connected by the connecting piece 244, after the first body 2411 and the second body 2412 are extracted, the filling block 243 and the supporting part 242 can also be ejected together with the formed blank, then the upper mold core 250 and the lower mold core 260 are disassembled, the supporting part 242 and the filling block 243 can fall from the center of the mold shell 210, thereby reducing the demolding process and operation difficulty.

[0069] The present application also provides a ceramic slurry pump impeller compression forming process, which comprises the following steps:

[0070] S1, filling: filling ceramic powder into the forming mold 200 and uniformly distributing the ceramic powder in the forming mold 200;

[0071] S2, compression molding: the upper die plate 220 and the lower die plate 230 of the molding die 200 are respectively pushed by the linear driving members 300 to squeeze the molding die 200 from both sides;

[0072] S3, demolding: the impeller blank is taken out of the molding die 200 after molding.

[0073] In the embodiment, the mobile platform 410 is first slid along the guide rail to the demolding station, and the assembled molding die 200 is installed on the mobile platform 410; then the mobile platform 410 is pushed to slide along the guide rail to the compression station, the telescopic member 510 of the compression assembly 500 is started to drive the pressing plate 520 to move downward to compress the mobile platform 410 and fix the molding die 200; then the inner cavity of the mold shell 210 of the molding die 200 is filled with ceramic powder, and the mold shell 210 is vibrated by the vibration device during the filling process to make the ceramic powder in the blade molding space.

[0074] During the compression molding, the two linear driving members 300 arranged above and below the molding die 200 are started, the telescopic ends of the two linear driving members 300 are simultaneously extended, the upper linear driving member 300 pushes the upper die plate 220 to move downward along the upper end guide groove of the mold shell 210 and the upper die core 250, and the lower linear driving member 300 pushes the lower die plate 230 to move upward along the lower end guide groove of the mold shell 210 and the lower die core 260, so as to apply pressure to the ceramic powder in the mold shell 210 from the upper and lower directions; when the pressure reaches the preset value (which is set according to the density requirement of the impeller blank), the pressure is maintained for a period of time (which is set according to the characteristics of the ceramic powder), so that the ceramic powder is fully densified to form the impeller blank.

[0075] After the pressure maintaining is completed, the demolding stage is entered, the telescopic ends of the linear driving members 300 are first controlled to retract to drive the upper die plate 220 to move upward and separate from the mold shell 210 and the upper die core 250, then the telescopic member 510 of the compression assembly 500 is started to drive the pressing plate 520 to move upward and separate from the mobile platform 410, and the mobile platform 410 is pushed to slide along the guide rail to the demolding station; the parts of the wedge block 240 are sequentially taken out, and the demolding is completed by pushing the lower die plate 230 with the linear driving members 300.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A ceramic slurry pump impeller press forming apparatus, characterized by, The utility model relates to a ceramic impeller blade forming device, comprising: a rack (100); a forming die (200) arranged on the rack (100), the forming die (200) comprising a die shell (210), an upper die plate (220) and a lower die plate (230) respectively slidingly arranged on the upper and lower ends of the die shell (210), and a plurality of wedge blocks (240) located in the die shell (210), a forming space of an impeller blade being formed between two adjacent wedge blocks (240); two linear driving members (300) arranged above and below the forming die (200) respectively, the forming die (200) being configured to, after the die shell (210) is filled with ceramic powder, push the upper die plate (220) and the lower die plate (230) simultaneously by the two linear driving members (300) to press the ceramic powder in the die shell (210) from the upper and lower directions; a plurality of through grooves (211) are formed in the side wall of the die shell (210), the number of the through grooves (211) corresponding to the number of the wedge blocks (240), the wedge blocks (240) being inserted into the through grooves (211), and a limiting groove (212) for abutting against the end of the wedge block (240) being formed on the side of the through groove (211) away from the center of the die shell (210); the wedge block (240) comprising: a connecting body (241) inserted into the through groove (211); a support portion (242) arranged on the lower die plate (230), the other end of the support portion (242) being used for supporting the end of the connecting body (241); a filling block (243) arranged on the upper end surface of the support portion (242), the filling block (243) being smoothly connected with the support portion (242) and the connecting body (241).

2. A ceramic slurry pump impeller press forming device according to claim 1, wherein the connecting body (241) comprising a first body (2411) and a second body (2412) arranged in series, the first body (2411) and the second body (2412) being inserted into the through groove (211), the second body (2412) being provided with a supporting table (2413) on the side thereof away from the center of the die shell (210) and used for supporting the first body (2411), and the support portion (242) being used for supporting the end of the second body (2412).

3. A ceramic slurry pump impeller press forming apparatus as claimed in claim 2, wherein the first body (2411) and the second body (2412) each comprising an upper layer plate (2414) and a lower layer plate (2415), the upper layer plate (2414) and the lower layer plate (2415) each being provided with a slot (2416), and the wedge block (240) further comprising a connecting member (244), the two ends of the connecting member (244) being respectively inserted into two slots (2416) connected with each other.

4. A ceramic slurry pump impeller press forming device according to claim 1, wherein The forming die (200) further comprises an upper mold core (250) and a lower mold core (260), an end of the wedge block (240) close to the center of the mold shell (210) abuts against the lower mold core (260), the upper mold core (250) is inserted with the lower mold core (260), the lower mold plate (230) is slidingly connected with the lower mold core (260), and the upper mold plate (220) is slidingly connected with the upper mold core (250).

5. A ceramic slurry pump impeller press forming device according to claim 2, wherein The overlapping part of the second body (2412) and the support part (242) is provided with a positioning hole (2417), the positioning hole (2417) is used for inserting a positioning rod (270), and the outer side wall of the positioning rod (270) is provided with a shearing ring (271).

6. A ceramic slurry pump impeller press forming device as claimed in claim 1, wherein, The support part (242) comprises split blocks (2421) abutting against each other in sequence, and adjacent two split blocks (2421) are inserted.

7. A ceramic slurry pump impeller press forming device as claimed in claim 1, wherein, The rack (100) is provided with a moving assembly (400) and a pressing assembly (500), the moving assembly (400) is provided with a moving table (410) for receiving the forming die (200), the pressing assembly (500) is used for pressing the moving table (410), and the pressing assembly (500) comprises: A telescopic part (510) arranged on the rack (100); A pressing plate (520) arranged at the telescopic end of the telescopic part (510), and the pressing plate (520) is used for pressing the moving table (410).

8. A ceramic slurry pump impeller compression molding process characterized by, The ceramic slag slurry pump impeller pressing forming device comprises the following steps: S1, filling: ceramic powder is filled into the forming die (200) and uniformly distributed in the forming die (200); S2, pressing forming: the upper mold plate (220) and the lower mold plate (230) of the forming die (200) are respectively pushed by the linear driving part (300), and the forming die (200) is extruded on both sides; S3, demolding: after forming, the blank body of the impeller is taken out from the forming die (200).

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