Ceramic slurry pump impeller compression molding device and molding process

Abstract

The invention relates to the technical field of forming equipment, and provides a ceramic slurry pump impeller compression forming device and a ceramic slurry pump impeller compression forming process. The forming mold is arranged on the machine frame and comprises a mold shell, an upper mold plate, a lower mold plate and a plurality of wedge blocks, the upper mold plate and the lower mold plate are arranged at the upper end and the lower end of the mold shell in a sliding mode respectively, the wedge blocks are located in the mold shell, and the two linear driving pieces are arranged above and below the forming mold respectively; the upper die plate and the lower die plate are pushed at the same time through the two linear driving pieces so that ceramic powder in the die shell can be pressed in the upper direction and the lower direction. According to the compression molding device for the ceramic slurry pump impeller, the upper mold plate and the lower mold plate of the molding mold are bidirectionally pushed through the two linear driving pieces, so that the extrusion force received by ceramic powder in the molding mold is more uniform, and the molding 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-abrasion 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. Currently, ceramic slurry pump impellers are mainly divided into open impellers, semi-open impellers and closed impellers according to their structural forms. Among them, the closed impeller has a front cover plate, a rear cover plate and an integrated structure with the blades, which can effectively reduce the liquid backflow loss during transportation, improve the hydraulic efficiency, and the synergistic effect of the blades and the cover plates can enhance the overall impact and wear resistance of the impeller. In high-pressure and high-concentration slurry conveying scenarios, it is most widely used. In order 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.

[0003] The press forming of ceramic impellers needs to rely on a mold to shape the blank, and the closed flow channel cavity is formed between the front cover plate and the rear cover plate of the closed impeller. The blades are mostly twisted and arc-shaped structures and seamlessly connected with the cover plates, which requires the mold to be designed as a complex cavity that completely matches the shape of the flow channel cavity and the blades. However, common press forming equipment usually only applies pressure to the mold from one side. For simple-shaped parts such as cover plates, metal blocks and straight gears, the forming pressure is sufficient. However, for complex-shaped impellers, the forming quality of the cover plate on one side is good, especially for large-size impellers, the structure close to the cover plate on the other side is prone to quality defects. SUMMARY

[0004] 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-size impellers by press forming.

[0005] According to one aspect, at least one embodiment of the present application provides a ceramic slurry pump impeller press forming device, comprising: a rack; a forming mold arranged on the rack, the forming mold comprising a mold shell, an upper mold plate and a lower mold plate respectively slidingly arranged at the upper and lower ends of the mold shell, and a plurality of wedge blocks located in the mold shell, the forming space of the impeller blades being formed between adjacent two wedge blocks; Linear driving members, the number of which is two and which are arranged above and below the forming die respectively, the forming die being configured to, after the ceramic powder is filled in the mold shell, push the upper die plate and the lower die plate simultaneously by the two linear driving members to press the ceramic powder in the mold shell from the top and bottom directions.

[0006] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a mold shell, a plurality of wedge blocks and a plurality of connecting bodies.

[0007] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a mold shell, a plurality of wedge blocks and a plurality of connecting bodies. The connecting body is inserted into the through groove. The support portion is arranged on the lower die plate, and the other end of the support portion is used for supporting the end of the connecting body. The filling block is arranged on the upper end surface of the support portion, and the filling block is smoothly connected with the support portion and the connecting body.

[0008] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a mold shell, a plurality of wedge blocks and a plurality of connecting bodies.

[0009] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a mold shell, a plurality of wedge blocks and a plurality of connecting bodies.

[0010] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a mold shell, a plurality of wedge blocks and a plurality of connecting bodies.

[0011] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a second main body and a support part, and the second main body and the support part are connected through a connecting part, and the connecting part comprises a first connecting part and a second connecting part.

[0012] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a second main body and a support part, and the second main body and the support part are connected through a connecting part, and the connecting part comprises a first connecting part and a second connecting part.

[0013] For example, the ceramic slurry pump impeller pressing forming device provided by at least one embodiment of the present application comprises a second main body and a support part, and the second main body and the support part are connected through a connecting part, and the connecting part comprises a first connecting part and a second connecting part. a telescopic part arranged on the rack; a pressing plate arranged at a telescopic end of the telescopic part, and the pressing plate is used for pressing the moving table.

[0014] According to another aspect, at least one embodiment of the present application also provides a ceramic slurry pump impeller pressing forming process, which uses the above-mentioned ceramic slurry pump impeller pressing forming device and comprises the following steps: S1, filling: filling ceramic powder into the forming mold and making the ceramic powder uniformly distributed in the forming mold; S2, pressing forming: pushing the upper mold plate and the lower mold plate of the forming mold through the linear driving parts respectively, and extruding the forming mold from both sides; S3, demolding: taking the blank of the impeller out of the forming mold after forming.

[0015] The present application has the following beneficial effects: In the present application, two linear driving parts are arranged above and below the forming mold, respectively, so that driving force can be applied to the upper mold plate and the lower mold plate at the same time, forming 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 receive uniform pressure in the upward and downward directions, especially for large-size impeller blanks, the structures on the two sides close to the upper mold plate and the lower mold plate can all 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 in the unilateral pressing mode in the prior art, and improving the consistency of the overall forming quality of the impeller blank. BRIEF DESCRIPTION OF DRAWINGS

[0016] 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 effort.

[0017] Figure 1 Fig. 1 is a schematic diagram of the overall structure of a ceramic slag slurry pump impeller press forming device according to an embodiment of the present application; Figure 2 Fig. 2 is a schematic diagram of the structure of a forming mold according to an embodiment of the present application; Figure 1 Figure 3 Fig. 3 is a schematic diagram of the cross-sectional structure of A-A according to an embodiment of the present application; Figure 2 Figure 4 Fig. 4 is a schematic diagram of the partial structure of a forming mold according to an embodiment of the present application; Figure 1 Figure 5 Fig. 5 is a schematic diagram of the enlarged structure of A according to an embodiment of the present application; Figure 4 Figure 6 Fig. 6 is a schematic diagram of the partial structure of a forming mold according to another embodiment of the present application; Figure 1 Figure 7 Fig. 7 is a schematic diagram of the structure of a wedge according to an embodiment of the present application; Figure 1 Figure 8 Fig. 8 is a schematic diagram of the structure of a wedge according to another embodiment of the present application; Figure 1 Figure 9 Fig. 9 is a front view of a wedge according to an embodiment of the present application; Figure 1 Figure 10 Fig. 10 is a schematic diagram of the structure of a first main body of a forming mold according to an embodiment of the present application; Figure 1 Figure 11 Fig. 11 is a schematic diagram of the structure of a first main body of a forming mold according to another embodiment of the present application; Figure 1 Figure 12 Fig. 12 is a schematic diagram of the structure of a second main body of a forming mold according to an embodiment of the present application; Figure 1 Figure 13 Fig. 13 is a schematic diagram of the structure of a filling block of a forming mold according to an embodiment of the present application; Figure 1 Figure 14 Fig. 14 is a schematic diagram of the structure of a support part of a forming mold according to an embodiment of the present application; Figure 1 Figure 15 Fig. 15 is a schematic diagram of the structure of a support part of a forming mold according to another embodiment of the present application; Figure 14 ​​​​​​​​​​​​​An enlarged structural schematic view of the B part in the figure; Figure 16 For Figure 1 Another angle structural schematic view of the forming mold support part in the embodiment.

[0018] In the figure: 100, rack; 200, forming mold; 210, mold shell; 211, through slot; 212, limiting slot; 220, upper mold plate; 230, lower mold plate; 240, wedge block; 241, connecting main body; 2411, first main body; 2412, second main body; 2413, supporting table; 2414, upper layer plate; 2415, lower layer plate; 2416, insertion slot; 2417, positioning hole; 242, support part; 2421, split block; 243, filling block; 244, connecting piece; 250, upper mold core; 260, lower mold core; 270, positioning rod; 271, shearing ring; 300, linear driving piece; 400, moving assembly; 410, moving table; 500, pressing assembly; 510, telescopic piece; 520, pressing plate. DETAILED DESCRIPTION

[0019] The 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 application, and not to limit the application.

[0020] In order to make the drawing simple, only the parts related to the application are shown in each figure, which does not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some figures, only one of the parts with the same structure or function is shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0021] In this article, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through 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 application can be understood according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figure 1 The diagram illustrates a ceramic slurry pump impeller pressing and forming apparatus according to an embodiment of the present invention, comprising a frame 100, a forming mold 200, and a linear drive component 300. The frame 100 is provided with a moving assembly 400 and a pressing assembly 500. The moving assembly 400 includes a guide rail and a moving platform 410. The guide rail is fixed to the frame 100 and extends horizontally. The moving platform 410 is slidably engaged with the guide rail and is used to mount the base plate of the forming mold 200. The moving assembly 400 also includes a drive component disposed on the frame 100, which drives the moving platform 410 to move. The pressing assembly 500 includes a telescopic member 510 and a pressure plate 520. The telescopic member 510 is fixed to the frame 100, and its telescopic end is located above the moving table 410. The telescopic end of the telescopic member 510 extends upward. The pressure plate 520 is fixed to the telescopic end of the telescopic member 510. The lower end surface of the pressure plate 520 is provided with a pressing surface that matches the upper end surface of the moving table 410 for pressing the moving table 410. The moving table 410 drives the forming mold 200 to move, dividing the frame 100 into two stations: a pressing station and a demolding station. The frame 100 is provided with two linear drive members 300 arranged vertically opposite each other. The pressing station is located between the two linear drive members 300. The forming mold 200 can complete the feeding and pressing of ceramic powder at this station. The other side of the pressing station is the demolding station. After pressing, the moving table 410 moves into the demolding station, where the formed blank is demolded.

[0026] The driving component drives the moving stage 410 to slide along the guide rail to the pressing station where the forming mold 200 is aligned with the linear driving component 300. The telescopic component 510 of the clamping assembly 500 is activated, causing its telescopic end to extend and move the pressure plate 520 downwards until its pressing surface is in contact with the upper surface of the moving stage 410, applying pressure and fixing the moving stage 410 at the pressing station. Subsequently, ceramic powder filling and pressing processes are performed. After pressing, the telescopic component 510 is activated to move the pressure plate 520 upwards, disengaging it from the moving stage 410. The driving component then drives the moving stage 410 to slide along the guide rail to the demolding station for demolding. By setting two adjacent stations, the forming mold 200 is prevented from being positioned below the linear driving component 300 during demolding, reducing the safety risks to operators. When the moving table 410 drives the forming mold 200 into the demolding station, the linear drive component 300 located below the forming mold 200 also enters the demolding station. At this time, after the linear telescopic component 510 extends, it can push the lower template 230 upward, thereby ejecting the formed blank from the forming mold 200 and assisting in demolding.

[0027] 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.

[0028] 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 4-5The side wall of the mold shell 210 is provided with a plurality of through grooves 211, the number of the through grooves 211 corresponds to the number of the wedge blocks 240, the through grooves 211 are uniformly distributed along the circumferential direction of the mold shell 210, the cross-sectional shape of the through grooves 211 is adapted to the shape of the end of the wedge block 240, and the side of the through groove 211 away from the center of the mold shell 210 is provided with a limiting groove 212, the limiting groove 212 is used for abutting with the end of the wedge block 240, the through groove 211 and the limiting groove 212 are arranged to improve the support and positioning of the wedge block 240, and ensure the accurate position of the wedge block 240. The limiting groove 212 of the through groove 211 abuts with the end of the wedge block 240, limits the depth of the wedge block 240 extending into the inner cavity of the mold shell 210, makes the extending length of the plurality of wedge blocks 240 along the circumferential direction of the mold shell 210 consistent, and further ensures that the size of the blade forming space composed of the adjacent wedge blocks 240 is uniform, solves the problem of blade shape deviation caused by inaccurate positioning of the wedge block 240 in the existing mold, and improves the forming precision of the impeller blade.

[0029] The number of the linear driving members 300 is two, one of the linear driving members 300 is arranged above the forming mold 200, the linear driving member 300 is fixedly connected with the upper part of the rack 100 through a support, the telescopic end of the linear driving member 300 extends downward and is detachably connected with the upper surface of the upper mold plate 220; the other linear driving member 300 is arranged below the forming mold 200, the linear driving member 300 is fixedly connected with the lower part of the rack 100, the telescopic end of the linear driving member 300 extends upward and is detachably connected with the lower surface of the lower mold plate 230.

[0030] In this embodiment, when the impeller is pressed, first, the assembly of the forming die 200 is carried out, a plurality of wedges 240 are placed in the hollow cavity of the mold shell 210 in a circumferentially uniform and spaced manner, so that adjacent wedges 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 during the filling process, the mold shell 210 is vibrated to make the ceramic powder 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; 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 shell 210 is directly installed on the linear drive 300 located above, and here the upper die plate 220 is installed at the extension end of the upper linear drive 300 as an example. Start two linear drives 300, the extension ends of the two linear drives 300 are extended at the same time, the upper linear drive 300 pushes the upper die plate 220 to move downward along the upper end of the mold shell 210, and the lower linear drive 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 extension ends of the two linear drives 300 are controlled to retract, the upper linear drive 300 drives the upper die plate 220 to move upward and away from the mold shell 210, and the lower linear drive 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 moves again and drives the forming die 200 into the demolding station, and the operator can pull out the wedges 240 in the mold shell 210 at this position, and then the blank in the mold shell 210 is pushed out by the lower extension 510.

[0031] As a parallel technical solution, the arrangement of the wedges 240 can be adjusted according to the number of impeller blades, a plurality of wedges 240 can be arranged non-uniformly in the circumferential direction of the mold shell 210, as long as the adjacent two wedges 240 can form a forming space matched with the shape of the target impeller blade, and 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 supporting requirements of the wedges 240; the connection mode of the linear drive 300 and the upper die plate 220 and the lower die plate 230 can be replaced by fixed connection, such as welding to realize the connection of the extension end of the linear drive 300 and the upper die plate 220 and the lower die plate 230, as long as the driving force can be transmitted; for example Figure 3As shown, 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 act uniformly on the ceramic powder; the vane forming space composed of the plurality of wedge blocks 240 directly realizes the shape setting of the closed impeller twisted arc vane, solves the problem that the existing mold is difficult to match the complex structure of the vane, and provides protection for the forming of the impeller vane.

[0032] The two linear driving members 300 are respectively arranged above and below the forming mold 200, and 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 can make the ceramic powder in the mold shell 210 receive uniform pressure in the upward and downward directions, especially for large-size impeller blanks, the structure of the two sides close to the upper mold plate 220 and the lower mold plate 230 can obtain sufficient forming pressure, effectively avoiding the quality defects such as insufficient density, cracks and missing corners of the structure far from the driving end side in the existing unilateral pressing, and improving the consistency of the overall forming quality of the impeller blank.

[0033] The wedge block 240 ensures the accuracy of the vane forming space, so that the shape of the impeller vane meets the design requirements; the bidirectional pressing ensures that the ceramic powder is fully densified in the forming space, improving the density of the blank. The synergistic effect makes the formed impeller blank not only meet the shape accuracy, but also have uniform overall structure, 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.

[0034] 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 forming quality of the structure far from the end, the device can reduce the pressure load of a single linear driving member 300, reduce the loss of a single driving member, and improve the service life and operation 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 equipment manufacturing cost.

[0035] Reference Figures 7-16The wedge block 240 comprises a connecting body 241, a supporting part 242, a filling block 243 and a connecting piece 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. The first body 2411 and the second body 2412 are both inserted into the through groove 211. The second body 2412 is provided with a supporting table 2413 on the side away from the center of the mold shell 210, and the supporting table 2413 is used for supporting the first body 2411. The first body 2411 and the second body 2412 both comprise an upper layer plate 2414 and a lower layer plate 2415. The splicing surfaces of the upper layer plate 2414 and the lower layer plate 2415 are both provided with a slot 2416. The two ends of the connecting piece 244 are respectively inserted into two adjacent slots 2416, so as to fix the first body 2411 and the second body 2412. The supporting part 242 is arranged on the lower die plate 230. In order to facilitate disassembly, the end of the supporting part 242 is in abutment with the lower die plate 230. As shown in Figure 14 , the supporting part 242 is composed of a plurality of sub-blocks 2421 which are in abutment with each other. The two adjacent sub-blocks 2421 are inserted into each other through the cooperation of the convex platform and the concave groove.

[0036] In the embodiment, the connecting body 241 of the wedge block 240 is composed of the first body 2411 and the second body 2412. Compared with the integral wedge block 240, the machining difficulty of the twisted arc surface can be reduced, and the side wall which is accurately matched with the shape of the impeller blade can be easily machined. The supporting table 2413 of the second body 2412 provides support for the first body 2411. In cooperation with the fixing mode of the connecting piece 244 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, and the structural stability of the connecting body 241 can be enhanced.

[0037] Further, one end of the supporting part 242 is used for supporting the end of the second body 2412. The overlapping part of the second body 2412 and the supporting part 242 is provided with a positioning hole 2417. A positioning rod 270 is inserted into the positioning hole 2417. A shearing ring 271 is arranged on the outer side wall of the positioning rod 270 and is located at the overlapping surface of the second body 2412 and the supporting part 242. The filling block 243 is arranged on the upper end surface of the supporting part 242. The two sides of the filling block 243 are smoothly connected with the upper end surface of the supporting part 242 and the side wall of the connecting body 241, so as to fill the gap between the supporting part 242 and the connecting body 241. Referring to Figure 9 , in order to accurately position the whole wedge block 240 in the mold shell 210, the end of the supporting part 242 protrudes outward from the end surface of the first body 2411 and the second body 2412, so as to be in abutment with the lower die plate 230. 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 with 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.

[0038] 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 material process, and improve the molding quality of the impeller. The positioning hole 2417 at the lap joint 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.

[0039] 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 gap 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.

[0040] The present application also provides a ceramic slurry pump impeller compression forming process, which comprises the following steps: S1, filling: filling ceramic powder into the forming mold 200 and uniformly distributing the ceramic powder in the forming mold 200; 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, and the molding die 200 is squeezed from both sides; S3, demolding: the impeller blank is taken out from the molding die 200 after molding.

[0041] In the embodiment, first, the mobile platform 410 is 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, the pressing plate 520 is driven to move downward to compress the mobile platform 410, and the molding die 200 is fixed; then, the ceramic powder is filled into the inner cavity of the mold shell 210 of the molding die 200, and the mold shell 210 is vibrated by the vibration device during the filling process, so that the ceramic powder is formed in the blade forming space.

[0042] 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, 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, and the ceramic powder in the mold shell 210 is pressed 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.

[0043] After the pressure maintaining is completed, the demolding stage is entered, first, the telescopic end of the linear driving member 300 is controlled to retract, the upper die plate 220 is driven to move upward to separate from the mold shell 210 and the upper die core 250, then the telescopic member 510 of the compression assembly 500 is started, the pressing plate 520 is driven to move upward to separate from the mobile platform 410, the mobile platform 410 is pushed to slide along the guide rail to the demolding station, and 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 member 300.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand 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 at 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.

2. A ceramic slurry pump impeller press forming device according to claim 1, wherein, The side wall of the die shell (210) is provided with a plurality of through grooves (211), 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 the through grooves (211) being provided with limiting grooves (212) on the side away from the center of the die shell (210) for abutting against the end of the wedge block (240).

3. A ceramic slurry pump impeller press forming device according to claim 2, wherein, The wedge block (240) comprises: 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).

4. A ceramic slurry pump impeller press forming device according to claim 3, wherein The connecting body (241) comprises 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 away from the center of the die shell (210) for supporting the first body (2411), and the support portion (242) being used for supporting the end of the second body (2412).

5. A ceramic slurry pump impeller press forming apparatus as claimed in claim 4, wherein The first body (2411) and the second body (2412) each comprise 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 comprises a connecting member (244), the two ends of the connecting member (244) being respectively inserted into two slots (2416) connected with each other.

6. A ceramic slurry pump impeller press forming device as claimed in claim 3, 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).

7. A ceramic slurry pump impeller press forming apparatus as claimed in claim 4 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).

8. A ceramic slurry pump impeller press forming device as claimed in claim 3, wherein, The support part (242) comprises split blocks (2421) abutting against each other in sequence, and adjacent two split blocks (2421) are inserted.

9. 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).

10. 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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