Pump wheel shell tower type side forming mold and using method thereof

Abstract

The invention relates to the technical field of dies, and discloses a pump impeller shell tower type side forming die and a using method thereof.The pump impeller shell tower type side forming die comprises an upper die and a lower die, the upper die comprises an upper die base, an upper cushion plate and a fixing assembly which are sequentially arranged from top to bottom, and a punch assembly is slidably arranged on the fixing assembly; a guide assembly connected to the upper base plate is arranged on the periphery of the fixing assembly. The guide assembly is provided with a guide structure in sliding fit with the punch assembly, and the extending direction of the guide structure is perpendicular to the inner wall of the outer ring of the pump wheel shell. According to the pump wheel shell tower type side forming die and the using method thereof, the sliding block and the stamping head are guided to move through the guide groove, so that the stamping head is jacked into the pump wheel shell in the direction perpendicular to the inner wall of the outer ring of the pump wheel shell, the shape of a stamped blind groove is the same as that of a stamping forming end through the limiting effect of the U-shaped groove, and the stamping forming efficiency is improved. The adaptability of the blind grooves and the roots of the blades is guaranteed, and the connecting precision and the connecting firmness of the blades and the pump impeller shell are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and more specifically, it relates to a tower side forming mold for a pump wheel housing and a method for using the same. Background Art

[0002] A hydraulic torque converter is a mechanical device that transmits power relying on hydraulic components. It can convert and transmit the torque output by the engine, and at the same time achieve the functions of stepless speed change and buffering and shock absorption. The pump wheel housing is an important part of the hydraulic torque converter. Its manufacturing process directly affects the performance and reliability of the hydraulic torque converter. During the production process of the pump wheel housing, three circles of leaf-shaped structure card slots need to be stamped on the inner wall of the pump wheel housing. The card slots can be through slots or blind slots. These three circles of card slots are respectively located on the inner circle, middle circle and outer circle of the pump wheel housing, and are used for the embedding of the blade roots to ensure the precise installation and firm connection of the blades on the pump wheel housing, thereby ensuring the overall performance of the hydraulic torque converter.

[0003] Chinese Patent with Publication No. CN111974883A discloses a normal angle stamping die for a pump wheel housing of a hydraulic torque converter, including an upper die base and a lower die base. An upper backing plate, a first limiting plate, a second limiting plate, a third limiting plate and a punch fixing seat are sequentially arranged at the lower end of the lower die base. The punch fixing seat is in a bowl-shaped structure. Three notches are arranged at the circumferential part of the punch fixing seat, and a stamping seat is fixed in each of the three notches. A stamping block protrudes from the bottom of the stamping seat. The first stamping block of this technology is inclined. By controlling the downward movement of the upper template through the driving module, the first stamping block is driven to move downward synchronously to punch holes in the upper annular surface of the pump wheel housing. However, since the stamping direction of the first stamping block (the moving direction when the first stamping block penetrates into the pump wheel housing) is vertically downward, and the pump wheel housing is in a bowl-shaped structure and the inner wall of the pump wheel housing is a curved surface structure. During the vertical stamping process, the end surface of the stamping end of the first stamping block forms a vertical side wall of the through hole on the pump wheel housing. The vertical side wall cannot effectively constrain the blade root, and all side walls of the through hole cannot effectively constrain the upper surface of the blade root, resulting in a poor mechanical fitting effect between the blade root and the through hole. Even if the blade root is welded in the through hole of the pump wheel housing subsequently, due to the fact that the through hole cannot accurately position the blade root, the connection accuracy between the blade and the pump wheel housing is poor, which will lead to a reduction in the working performance of the finally assembled hydraulic torque converter. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects existing in the prior art, and provide a tower side forming mold for a pump wheel housing and a method for using the same. By adjusting the stamping direction to be perpendicular to the outer ring inner wall of the pump wheel housing, the stamped card slots can also effectively constrain the upper surface of the blade root, so that a good mechanical fitting can be formed between the blade and the card slot, and the connection accuracy between the blade and the pump wheel housing is improved.

[0005] To achieve the above object, the technical solution of the present invention provides a tower side forming die for a pump wheel housing, including: an upper die and a lower die. The upper die includes an upper die base, an upper backing plate, and a fixing component arranged in sequence from top to bottom. A punch component is slidably arranged on the fixing component. A guiding component connected to the upper backing plate is arranged on the outer periphery of the fixing component, and the distance between the guiding component and the upper backing plate is variable; The guiding component is provided with a guiding structure that slidably cooperates with the punch component. The extending direction of the guiding structure is perpendicular to the inner wall of the outer ring of the pump wheel housing. The lower die is provided with a groove that cooperates with the punch component. When the upper die and the lower die are closed, the fixing component drives the punch component to move along the extending direction of the guiding structure, and a clamping groove is punched on the inner wall of the outer ring of the pump wheel housing.

[0006] By using the tower side forming die for a pump wheel housing of the present invention, the movement of the punch component is guided by the guiding structure of the guiding component, so that the punching direction of the punch component is perpendicular to the inner wall of the outer ring of the pump wheel housing. By controlling the cross-sectional dimension of the part of the punch component inserted into the pump wheel housing to be correspondingly equal to the cross-sectional dimension of the blade root, the adaptability between the clamping groove and the blade is ensured, and the inner wall of the clamping groove can effectively restrain the blade root, ensuring that the blade root can be firmly embedded in the clamping groove of the outer ring of the pump wheel housing, greatly improving the connection accuracy and firmness between the blade and the pump wheel housing.

[0007] Preferably, the groove is arranged as a U-shaped groove, the clamping groove is a blind groove, and the punch component cooperates with the U-shaped groove to punch and form the blind groove. With such a design, no redundant waste is generated when punching the blind groove, reducing the waste cleaning process and saving the waste cleaning cost.

[0008] Preferably, N groups of punch components are circumferentially and arrayed around the center line of the fixing component. In the Chinese patent with the publication number CN111974883A in the background art, the punching method is to punch multiple times by rotation, and the punching efficiency of the blind groove is relatively low. The design of the present application is to form it in one time, greatly improving the punching efficiency of the blind groove.

[0009] Preferably, the punch component includes a punching head and an L-shaped slider, and the punching head is detachably installed on the slider. With such a design, it is beneficial to improve the maintenance efficiency of the punch component and is beneficial to reducing the maintenance cost of the punch component.

[0010] Preferably, the stamping head is provided with a stamping and forming end, the stamping and forming end is inclined, the slider is provided with a mounting groove, and the stamping head is mounted in the mounting groove by bolts. With such a design, the stamping head can be stably mounted in the mounting groove, and the inclination angles of the stamping and forming ends of all the stamping heads are the same, which is beneficial to improving the accuracy of the inclination angle of the blind groove stamped out.

[0011] Preferably, the fixing component is provided with N limiting grooves, the guiding structure is a guiding groove, the slider includes a first slider and a second slider, the first slider is slidably connected with the limiting grooves, the second slider is slidably connected with the guiding groove, and the mounting groove is arranged on the first slider. With such a design, through the sliding fit between the first slider and the limiting grooves and the sliding fit between the second slider and the guiding groove, the fixing component can drive the punch component to make the stamping and forming end push into the pump wheel housing in a direction perpendicular to the inner wall of the outer ring of the pump wheel housing.

[0012] Preferably, the fixing component includes a fixing seat and a limiting ring. The fixing seat is fixedly connected to the bottom surface of the upper cushion plate. The limiting ring is arranged between the fixing seat and the guiding component, and the limiting ring is fixedly connected to the fixing seat through a connecting column. The limiting grooves are arranged on the outer ring of the fixing seat, and the inner ring of the limiting ring is in sliding fit with the first slider. With such a design, during the process of the upper die and the lower die being separated, the limiting ring can drive the punch component to make the stamping and forming end withdraw from the blind groove in a direction perpendicular to the inner wall of the outer ring of the pump wheel housing, so as to facilitate the demolding of the pump wheel housing from the upper die.

[0013] Preferably, a first nitrogen spring is fixedly installed in the upper cushion plate. The guiding component includes a first clamping plate, a ring plate and a second clamping plate which are arranged in sequence from top to bottom to enclose to form the guiding groove. The first clamping plate is connected to the telescopic end of the bottom of the first nitrogen spring, and the upper cushion plate is fixedly installed with a supporting block for supporting the first clamping plate. With such a design, by setting the first nitrogen spring, the variable distance between the guiding component and the upper cushion plate can be realized. By setting the first clamping plate, the ring plate and the second clamping plate, the guiding component with a guiding groove is assembled by the three, which is beneficial to reducing the manufacturing difficulty of the guiding component and thus reducing the production cost of the mold.

[0014] Preferably, the lower die includes a lower die base, a lower cushion plate and a lower template which are arranged in sequence from bottom to top. A limiting post for supporting the second clamping plate is fixedly installed on the lower cushion plate. A receiving groove adapted to the outer contour of the pump wheel housing is arranged at the top of the lower template, and the groove is arranged on the groove wall of the receiving groove. With such a design, by setting the limiting post, the downward movement range of the guiding component can be limited, so as to realize the mutual cooperation of the guiding component, the punch component and the fixing component. By setting the receiving groove, a receiving space can be provided for the pump wheel housing.

[0015] Preferably, a second nitrogen spring is fixedly installed in the lower backing plate, a jacking column is slidably installed in the lower template and is drivingly connected to the telescopic end at the top of the second nitrogen spring, a positioning port with a polygonal structure is penetratingly arranged at the center of the pump wheel housing, and a positioning head adapted to the positioning port is installed at the top of the jacking column. With such a design, the second nitrogen spring pushes the jacking column to jack up the pump wheel housing after the punching groove is completed, and the pump wheel housing and the lower template of the lower die can achieve automatic demoulding.

[0016] Preferably, a third nitrogen spring is fixedly installed in the fixing seat, the telescopic end at the bottom of the third nitrogen spring is drivingly connected to a pressure core slidably connected to the fixing seat, the pressure core is located directly above the jacking column, and a receiving hole for receiving the positioning head is arranged at the bottom of the pressure core. With such a design, the third nitrogen spring can push the pressure core to reset, and the pressure core pushes the pump wheel housing after the punching groove is completed to separate from the fixing assembly, and the pump wheel housing and the fixing assembly of the upper die can achieve automatic demoulding.

[0017] A using method of a tower side forming die for a pump wheel housing, characterized by comprising the following steps: S1. Place the pump wheel housing; S2. The upper die moves downward, and the pressure core and the jacking column press the pump wheel housing tightly; S3. The upper die and the lower die are closed, and the stamping head is pushed into the pump wheel housing along the extending direction of the guiding groove; S4. The upper die and the lower die are separated, and the stamping head withdraws from the pump wheel housing along the opposite direction in S3; S5. Take out the pump wheel housing.

[0018] With such a design, the pump wheel housing is fixed by the positioning head, the jacking column and the pressure core first, and then the pump wheel housing is stamped, which is beneficial to improving the stamping accuracy.

[0019] Preferably, S3 includes the following steps: S31. The pressure core moves downward to push the pump wheel housing to fit against the wall of the receiving groove; S32. The second clamping plate abuts against the limiting column; S33. The fixing assembly moves downward, the fixing seat pushes the slider and the stamping head to move along the extending direction of the guiding groove, and the stamping forming end of the stamping head is pushed into the pump wheel housing.

[0020] With such a design, through the pushing action of the fixing seat on the slider, the stamping of the pump wheel housing by the stamping head is completed.

[0021] Preferably, S4 includes the following steps: S41. The fixing component moves upward, the second clamping plate remains in contact with the limiting post, the limiting ring pushes the slider and the stamping head to move in the opposite directions in S33, and the stamping end of the stamping head withdraws from the clamping slot of the pump wheel housing. S42. The second clamping plate separates from the limiting post. S43. The jacking post pushes the pump wheel housing upward, and the pump wheel housing separates from the accommodating groove.

[0022] With such a design, through the pushing action of the limiting ring on the slider, the reset of the stamping head is completed.

[0023] The beneficial effects of the present invention are as follows: 1. By using a tower side forming die for a pump wheel housing and its using method according to the present invention, through the cooperation of the fixing component, the punch component and the guiding component, the stamping direction of the stamping head is consistent with the extending direction of the guiding groove. The movement of the slider and the stamping head is guided by the guiding groove, so that the stamping end of the stamping head is pushed into the pump wheel housing along the direction perpendicular to the outer ring inner wall of the pump wheel housing. At the same time, through the limiting action of the U-shaped groove, the shape of the punched blind groove is the same as the shape of the stamping end, and the size of the stamping end is exactly the same as the size of the blade root, ensuring the adaptability between the blind groove and the blade root, enabling the blade to be firmly embedded in the blind groove of the outer ring of the pump wheel housing, greatly improving the connection accuracy and firmness between the blade and the pump wheel housing, and thus ensuring that the assembled torque converter has good working performance.

[0024] 2. All the blind grooves on the outer ring of the pump wheel housing are formed by one-time stamping, which is beneficial to improving the stamping efficiency of the blind grooves, thus greatly improving the processing efficiency of the pump wheel housing. And when stamping all the blind grooves at one time, each blind groove is ensured to have accurate dimensions through a stamping end of a punch and a corresponding U-shaped groove. The stamping of multiple blind grooves will not affect each other, greatly improving the dimensional accuracy of all the blind grooves.

[0025] 3. By setting the second nitrogen spring, the jacking post, the third nitrogen spring and the pressure core, after the punching of the pump wheel housing is completed, the second nitrogen spring pushes the jacking post to lift the pump wheel housing, the third nitrogen spring pushes the pressure core to reset, and the pressure core pushes the pump wheel housing to separate from the fixing component. The pump wheel housing can be automatically demolded from the lower template and the fixing component, improving the demolding efficiency of the pump wheel housing and being beneficial to the pipeline processing of the pump wheel housing. Description of the Drawings

[0026] Figure 1 is a three-dimensional structural schematic diagram of the pump wheel housing; Figure 2 is an overall structural schematic diagram of the tower side forming die for the pump wheel housing; Figure 3It is the front view schematic diagram of the tower side forming die for the pump impeller housing; Figure 4 It is the side view sectional schematic diagram of the tower side forming die for the pump impeller housing in the open mold state; Figure 5 It is the side view sectional schematic diagram of the tower side forming die for the pump impeller housing in the closed mold state; Figure 6 It is the three-dimensional structure schematic diagram of the upper mold; Figure 7 It is the bottom view schematic diagram of the upper mold; Figure 8 It is the three-dimensional structure schematic diagram of the lower mold; Figure 9 It is the three-dimensional structure schematic diagram of the punch assembly; Figure 10 It is the three-dimensional structure schematic diagram of the slider; Figure 11 It is the first three-dimensional structure schematic diagram of the fixing component; Figure 12 It is the second three-dimensional structure schematic diagram of the fixing component; Figure 13 It is the side view sectional schematic diagram of the fixing component; Figure 14 It is Figure 4 The enlarged view of the structure at A in Figure 15 It is the three-dimensional structure schematic diagram of the fixing seat; Figure 16 It is the three-dimensional structure schematic diagram of the limit ring; Figure 17 It is the three-dimensional structure schematic diagram of the guiding component; Figure 18 It is the three-dimensional structure schematic diagram of the first clamping plate; Figure 19 It is the three-dimensional structure schematic diagram of the second clamping plate; Figure 20 It is the three-dimensional structure schematic diagram of the supporting block; Figure 21 It is the three-dimensional structure schematic diagram of the upper backing plate, the first nitrogen spring, the guide pillar and the guide rod; Figure 22 It is the three-dimensional structure schematic diagram of the lower template.

[0027] In the figure: 100, upper die base; 200, upper backing plate; 210, first nitrogen spring; 220, supporting block; 221, supporting surface; 230, guiding column; 240, first shock-absorbing column; 250, guide pillar; 260, guide rod; 300. Fixed component; 310. Fixed seat; 311. Limit groove; 3111. First extrusion surface; 312. Placement groove; 320. Limit ring; 321. Second extrusion surface; 330. Connecting column; 340. Third nitrogen spring; 350. Pressure core; 351. Accommodation hole; 400. Punch component; 410. Punch head; 411. Stamping and forming end; 420. Slide block; 421. First slide block; 4211. Installation groove; 4212. First pressure-receiving surface; 4213. Second pressure-receiving surface; 422. Second slide block; 423. Lubrication groove; 500. Guide component; 510. First clamping plate; 511. First guide surface; 520. Ring plate; 530. Second clamping plate; 531. Second guide surface; 541. Guide groove; 600. Lower die base; 700. Lower backing plate; 710. Limit post; 720. Guide sleeve; 730. Second shock-absorbing column; 740. Second nitrogen spring; 800. Lower template; 810. U-shaped groove; 820. Accommodation groove; 830. Lifting column; 840. Positioning head; 850. Through groove; 900. Pump wheel housing; 910. Blind groove; 920. Positioning port; 930. Protrusion. Detailed implementation mode

[0028] Now, the subject matter described herein will be discussed with reference to exemplary embodiments. It should be understood that discussing these embodiments is for enabling those skilled in the art to better understand and thus implement the subject matter described herein. The functions and arrangements of the elements discussed can be changed without departing from the protection scope of the content of this specification. Each example can omit, substitute or add various processes or components as needed. Additionally, the features described relative to some examples can also be combined in other examples.

[0029] For a better understanding of the present invention, the following combines Figures 1 - 22 to describe in detail a tower side forming die for a pump wheel housing and its usage method of the present invention.

[0030] Example 1: As Figures 1 - 8 shown, a tower side forming die for a pump wheel housing includes: an upper die and a lower die. The upper die includes an upper die base 100, an upper backing plate 200, and a fixed component 300 arranged in sequence from top to bottom. A punch component 400 is slidably arranged on the fixed component 300. A guide component 500 connected to the upper backing plate 200 is arranged on the outer periphery of the fixed component 300, and the distance between the guide component 500 and the upper backing plate 200 is variable; The guiding assembly 500 is provided with a guiding structure that slidably cooperates with the punch assembly 400. The extending direction of the guiding structure is perpendicular to the inner wall of the outer ring of the pump wheel housing 900. The lower die is provided with a groove that cooperates with the punch assembly 400. When the upper die and the lower die are closed, the fixing assembly 300 drives the punch assembly 400 to move along the extending direction of the guiding structure, and a clamping groove is punched on the inner wall of the outer ring of the pump wheel housing 900.

[0031] It should be noted that during the process of closing the upper die and the lower die, first, the upper die base 100 drives the upper backing plate 200, the fixing assembly 300, the punch assembly 400 and the guiding assembly 500 to move downward synchronously; when the guiding assembly 500 abuts against the lower die, the guiding assembly 500 stops moving downward, and the upper die base 100 drives the upper backing plate 200 and the fixing assembly 300 to continue moving downward. The distance between the upper backing plate 200 and the guiding assembly 500 gradually decreases, and the fixing assembly 300 pushes the punch assembly 400 to continue moving. Under the guiding action of the guiding structure, the moving direction of the punch assembly 400 changes. The punch assembly 400 moves along the extending direction of the guiding structure and slides relative to the fixing assembly 300, that is, the punch assembly 400 moves along the direction perpendicular to the inner wall of the outer ring of the pump wheel housing 900 until the upper die and the lower die are completely closed. At this time, at least a part of the punch assembly 400 is pushed into the pump wheel housing 900, so as to punch a clamping groove on the inner wall of the outer ring of the pump wheel housing 900. During this process, the punching direction of the punch assembly 400 is perpendicular to the inner wall of the outer ring of the pump wheel housing 900 and is consistent with the depth direction of the clamping groove; the root of the blade and the clamping groove of the pump wheel housing 900 are firmly connected by interference fit or transitional fit.

[0032] In this embodiment, the upper backing plate 200 is fixedly installed on the bottom surface of the upper die base 100, and the fixing assembly 300 is fixedly installed on the side of the upper backing plate 200 away from the upper die base 100; the cross-sectional dimension of the part of the punch assembly 400 that is pushed into the pump wheel housing 900 corresponds to and is equal to the cross-sectional dimension of the root of the blade. The punched clamping groove is completely adapted to the root of the blade. When the root of the blade is embedded in the clamping groove, the inner wall of the clamping groove is closely attached to the surface of the root of the blade. Two opposite side walls of the clamping groove effectively constrain the upper and lower surfaces of the root of the blade, and the other two opposite side walls of the clamping groove effectively constrain the two opposite side surfaces of the root of the blade. The mechanical fitting effect between the root of the blade and the clamping groove is good, the connection accuracy between the blade and the pump wheel housing is high, the root of the blade is firmly embedded in the clamping groove, and the blade is not easily separated from the pump wheel housing 900.

[0033] By using a tower side forming die for a pump impeller housing of the present invention, the movement of the punch assembly 400 is guided by the guiding structure of the guiding assembly 500, so that the punching direction of the punch assembly 400 is perpendicular to the inner wall of the outer ring of the pump impeller housing 900. By controlling the cross-sectional dimension of the part of the punch assembly 400 that is inserted into the pump impeller housing 900 to be correspondingly equal to the cross-sectional dimension of the blade root, the adaptability between the card slot and the blade is ensured, and the inner wall of the card slot can effectively restrain the blade root, ensuring that the blade root can be firmly embedded in the card slot of the outer ring of the pump impeller housing 900, greatly improving the connection precision and firmness between the blade and the pump impeller housing 900.

[0034] Embodiment 2: As an optimization of Embodiment 1, as Figure 1 shown, the groove is set as a U-shaped groove 810, the card slot is a blind slot 910, and the punch assembly 400 cooperates with the U-shaped groove 810 to punch and form the blind slot 910.

[0035] It should be noted that after the upper die and the lower die are closed, the punch assembly 400 cooperates with the U-shaped groove 810 to punch and form the blind slot 910 on the inner wall of the outer ring of the pump impeller housing 900, and a protrusion 930 is formed at a position corresponding to the blind slot 910 on the outer wall of the outer ring of the pump impeller housing 900. The protrusion 930 is accommodated in the U-shaped groove 810, and the outer surface of the protrusion 930 is completely attached to the inner wall of the U-shaped groove 810. The U-shaped groove 810 plays a restrictive role in the formation of the protrusion 930. The shape of the protrusion 930 is restricted by the inner wall of the U-shaped groove 810 to ensure that the inner wall of the blind slot 910 is completely attached to the part of the punch assembly 400 that is inserted into the pump impeller housing 900. Therefore, the shape of the blind slot 910 is the same as the shape of the part of the punch assembly 400 that is inserted into the pump impeller housing 900, thereby improving the precision of the blind slot 910, improving the precision of the blind slot 910 for positioning the blade root, and also improving the connection precision between the blade and the pump impeller housing 900; If the formed card slot after punching is a through slot, after the blade root is inserted into the through slot, it is necessary to perform welding treatment on the area where the blade root is fitted with the through slot to seal the gap between the blade root and the through slot to ensure tightness, thereby preventing oil leakage during the working process. The welding process between the blade and the pump impeller housing is very complicated and time-consuming; by designing the formed card slot after punching as a non-penetrating blind slot 910, after the blade root is inserted into the blind slot 910, the tightness can be ensured without welding treatment, and no excess waste is generated when punching the blind slot 910, so there is no need to perform corresponding cleaning, reducing the waste cleaning process, thereby saving the cost required for waste cleaning.

[0036] In this embodiment, the dimension of the part of the punch assembly 400 that is inserted into the pump impeller housing 900 is exactly the same as the dimension of the blade root, so as to ensure that the formed blind slot 910 is completely adapted to the blade root and ensure that the blade root can be firmly embedded in the blind slot 910 of the outer ring of the pump impeller housing 900.

[0037] Example 3: As an optimization of Example 2, as Figure 6 and Figure 7 shown, N groups of punch assemblies 400 are circumferentially and arrayed around the center line of the fixed assembly 300, and the value of N is the same as the number of blind slots 910 stamped on the outer ring of the pump wheel housing 900.

[0038] It should be noted that the lower die is also provided with N U-shaped grooves 810, and the N U-shaped grooves 810 correspond to the N groups of punch assemblies 400 one by one. Through such a design, it is beneficial to improve the stamping efficiency of the blind slots 910, thereby improving the processing efficiency of the pump wheel housing 900; When the value of N is less than the number of blind slots 910 required to be stamped on the outer ring of the pump wheel housing 900, after the pump wheel housing 900 is stamped once, the pump wheel housing 900 is rotated by a preset angle, and then the pump wheel housing 900 is stamped again until a circle of blind slots 910 is formed through multiple stampings; When the value of N is the same as the number of blind slots 910 required to be stamped on the outer ring of the pump wheel housing 900, all the blind slots 910 on the outer ring of the pump wheel housing 900 are formed by one stamping. In addition, when all the blind slots 910 are stamped at one time, each blind slot 910 is ensured to have accurate dimensions through a punch assembly 400 and a corresponding U-shaped groove 810. The stampings of multiple blind slots 910 do not affect each other, and the accuracy of the blind slots 910 is higher.

[0039] Compared with the Chinese patent with the publication number CN111974883A in the background art, the stamping method is to rotate and stamp multiple times. Due to the rotary intermittent operation, cumulative errors will inevitably occur, thus unable to guarantee the machining accuracy of the final card slot position. In addition, step-by-step stamping will cause the deformation of the previous card slot, which is also the reason for the poor accuracy of the card slot. However, the card slots in the present application are integrally formed and there will be no such errors.

[0040] Example 4: As an optimization of Example 3, as Figure 9 shown, the punch assembly 400 includes a punch head 410 and an L-shaped slider 420, and the punch head 410 is detachably installed on the slider 420.

[0041] It should be noted that the slider 420 drives the stamping head 410 to stamp a blind groove 910 on the inner wall of the outer ring of the pump wheel housing 900 through sliding cooperation with the fixed component 300 and the guiding structure. The stamping head 410 can be detachably installed on the slider 420 through connection methods such as threaded connection, pin connection, and bolt connection. When the stamping head 410 is severely worn or damaged, resulting in the inability of the stamping head 410 to stamp out a blind groove 910 of a preset size, only the corresponding stamping head 410 needs to be disassembled and a new stamping head 410 is installed. On the one hand, the punch assembly 400 is in sliding cooperation with both the fixed component 300 and the guiding structure of the guiding component 500. The disassembly difficulty of the punch assembly 400 is much greater than that of the stamping head 410. Such a design is beneficial to reducing the time required for maintaining the punch assembly 400 and improving the maintenance efficiency of the punch assembly 400. On the other hand, it is not necessary to replace the entire punch assembly 400. Only the severely worn or damaged stamping head 410 needs to be replaced, which is beneficial to reducing the maintenance cost of the punch assembly 400.

[0042] In this embodiment, lubricating grooves 423 with an X-shaped structure are provided on the surfaces of the slider 420 in contact with the fixed component 300 and the guiding structure, so that lubricant can flow into the lubricating grooves 423 to lubricate the surfaces of the slider 420 in contact with the fixed component 300 and the guiding structure, reduce the friction between the slider 420 and the fixed component 300 and the guiding component 500, thereby reducing the wear of the slider 420 and increasing the service life of the slider 420.

[0043] Embodiment 5: As an optimization of Embodiment 4, as Figure 9 and Figure 10 shown, the stamping head 410 is provided with a stamping and forming end 411, the stamping and forming end 411 is inclined, the slider 420 is provided with a mounting groove 4211, and the stamping head 410 is installed in the mounting groove 4211 through bolts.

[0044] It should be noted that the stamping and forming end 411 is the part where the punch assembly 400 is pushed into the pump wheel housing 900. The size of the stamping and forming end 411 is the same as the size of the blade root. The stamping and forming end 411 is inclined, so as to stamp out an inclined blind groove 910 on the inner wall of the outer ring of the pump wheel housing 900; In a bolt - connection manner, the stamping head 410 can be stably installed in the installation groove 4211. The disassembly and assembly of the stamping head 410 are very convenient. In addition, the stamping head 410 is fixed in the installation groove 4211 by bolts, which can ensure that during the stamping process, the inclination angle of the stamping - forming end 411 remains unchanged, and the inclination angles of the stamping - forming ends 411 of all the stamping heads 410 are the same. Thus, it is ensured that all the blind grooves 910 stamped on the outer - ring inner wall of the pump - wheel housing 900 have the same inclination angle, which is beneficial to improving the accuracy of the inclination angle of the stamped blind grooves 910.

[0045] Embodiment 6: As an optimization of Embodiment 5, as Figure 4 , Figure 5 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 shown, the fixing component 300 is provided with N limiting grooves 311, the guiding structure is set as a guiding groove 541, the slider 420 includes a first slider 421 and a second slider 422. The first slider 421 is slidably connected with the limiting groove 311, the second slider 422 is slidably connected with the guiding groove 541, and the installation groove 4211 is arranged on the first slider 421.

[0046] It should be noted that when the guiding component 500 does not contact the lower die, the fixing component 300, the guiding component 500, and the slider 420 move synchronously without relative sliding among them. During the process of the upper die and the lower die being closed, when the guiding component 500 abuts against the lower die, the guiding component 500 stops moving and the position of the guiding groove 541 remains unchanged. Since the second slider 422 is slidably connected with the guiding groove 541, the second slider 422 can only move along the extending direction of the guiding groove 541. When the fixing component 300 continues to move downward, the fixing component 300 squeezes the first slider 421 through the inner wall of the limiting groove 311. Under the guidance of the guiding groove 541, both the first slider 421 and the second slider 422 move along the extending direction of the guiding groove 541. The first slider 421 drives the stamping head 410 to move synchronously, so that the stamping - forming end 411 of the stamping head 410 is pushed into the pump - wheel housing 900 along the direction perpendicular to the outer - ring inner wall of the pump - wheel housing 900. During this process, the first slider 421 and the limiting groove 311 have relative sliding, and the N groups of punch assemblies 400 expand outward as a whole, thereby stamping out a circle of blind grooves 910 on the outer - ring inner wall of the pump - wheel housing 900.

[0047] In this embodiment, the second slider 422 and the stamping head 410 are both arranged perpendicular to the first slider 421. The limiting groove 311 is provided with a first extrusion surface 3111. The first slider 421 includes a first pressure-receiving surface 4212 and a second pressure-receiving surface 4213 which are oppositely arranged. The first pressure-receiving surface 4212 is slidably attached to the first extrusion surface 3111. The other two oppositely arranged side surfaces of the first slider 421 are slidably attached to the two oppositely arranged side walls of the limiting groove 311. The second slider 422 is perpendicular to the first extrusion surface 3111. The included angle between the first extrusion surface 3111 and the vertical direction is α, and the extending direction of the guiding groove 541 forms an included angle β with the vertical direction, and the relational expression α + β = 90° is satisfied. The stamping forming end 411 protrudes from the second pressure-receiving surface 4213. The fixing assembly 300 extrudes the first pressure-receiving surface 4212 of the first slider 421 through the first extrusion surface 3111. The force of the fixing assembly 300 on the first slider 421 is perpendicular to the first pressure-receiving surface 4212. That is to say, the driving force generated by the fixing assembly 300 on the punch assembly 400 is parallel to the stamping direction of the stamping head 410. With such a design, the driving force of the fixing assembly 300 on the punch assembly 400 can be more effectively applied to the stamping forming end 411 of the stamping head 410 to press into the pump wheel housing 900.

[0048] Embodiment 7: As an optimization of Embodiment 6, as Figure 4 、 Figure 5 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 15 and Figure 16 shown, the fixing assembly 300 includes a fixing base 310 and a limiting ring 320. The fixing base 310 is fixedly connected to the bottom surface of the upper backing plate 200. The limiting ring 320 is arranged between the fixing base 310 and the guiding assembly 500, and the limiting ring 320 is fixedly connected to the fixing base 310 through a connecting column 330. The limiting groove 311 is arranged on the outer circle of the fixing base 310, and the inner circle of the limiting ring 320 is slidably attached to the first slider 421.

[0049] It should be noted that the fixing base 310 is arranged in a frustum shape. The top end surface of the fixing base 310 is fixedly connected to the upper backing plate 200. The bottom end surface of the fixing base 310 is smaller than the top end surface of the fixing base 310. The limiting ring 320 is provided with a second extrusion surface 321. The second extrusion surface 321 is slidably attached to the second pressure-receiving surface 4213 of the first slider 421, thereby playing a limiting role on the first slider 421, so that the first slider 421 can only move along the length direction of the limiting groove 311 and will not fall off from the limiting groove 311. After the blind groove 910 is stamped, during the process of the upper die and the lower die being separated, first, before the guiding component 500 is separated from the lower die, the upper die base 100 drives the upper backing plate 200 and the fixing component 300 to move upward. The second extrusion surface 321 of the limiting ring 320 extrudes the second pressure-receiving surface 4213 of the first slider 421. Under the guidance of the guiding groove 541, both the first slider 421 and the second slider 422 move along the extending direction of the guiding groove 541. The first slider 421 drives the stamping head 410 to move synchronously, so that the stamping and forming end 411 of the stamping head 410 exits from the blind groove 910 along the direction perpendicular to the inner wall of the outer ring of the pump wheel housing 900. During this process, the first slider 421 slides relative to the limiting groove 311, and the N groups of punch components 400 contract inward as a whole, and all the stamping and forming ends 411 exit from the blind groove 910; when the guiding component 500 is separated from the lower die, the upper die base 100 drives the upper backing plate 200, the fixing component 300, the punch component 400 and the guiding component 500 to move upward synchronously.

[0050] In this embodiment, when the upper die and the lower die are closed, the outer ring surface at the bottom of the limiting ring 320 fits with the inner ring surface at the top opening of the pump wheel housing 900. During the process of the upper die and the lower die being closed, the bottom of the limiting ring 320 enters the opening at the top of the pump wheel housing 900. Through the dimensional fit between the outer ring at the bottom of the limiting ring 320 and the top opening of the pump wheel housing 900, the size and roundness of the top opening of the pump wheel housing 900 can be maintained, preventing the opening at the top of the pump wheel housing 900 from deforming and shrinking during the process of the stamping head 410 punching out the blind groove 910 on the inner wall of the outer ring of the pump wheel housing 900.

[0051] Embodiment 8: As an optimization of Embodiment 7, as Figure 4 、 Figure 5 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 and Figure 21 shown, a first nitrogen spring 210 is fixedly installed in the upper backing plate 200. The guiding component 500 includes a first clamping plate 510, a ring plate 520 and a second clamping plate 530 which are sequentially arranged from top to bottom and enclose to form a guiding groove 541. The first clamping plate 510 is connected to the telescopic end at the bottom of the first nitrogen spring 210, and the upper backing plate 200 is fixedly installed with a supporting block 220 for supporting the first clamping plate 510.

[0052] It should be noted that the first nitrogen spring 210 is drivingly connected to the first clamping plate 510. In the open mold state, the first nitrogen spring 210 drives the first clamping plate 510 to separate from the upper backing plate 200 and is at the maximum distance. By setting the first nitrogen spring 210, the variable distance between the guiding component 500 and the upper backing plate 200 can be realized. During the process of closing the upper mold and the lower mold, when the guiding component 500 abuts against the lower mold, the guiding component 500 receives a supporting force from bottom to top. When the supporting force is transmitted to the first nitrogen spring 210, the first nitrogen spring 210 compresses, and the distance between the guiding component 500 and the upper backing plate 200 decreases. During the process of separating the upper mold and the lower mold, before the guiding component 500 separates from the lower mold, the first nitrogen spring 210 elongates, and the distance between the guiding component 500 and the upper backing plate 200 increases. The top of the annular plate 520 is fixedly connected to the first clamping plate 510, and the bottom of the annular plate 520 is fixedly connected to the second clamping plate 530. In the open mold state, the supporting block 220 supports the entire guiding component 500 by supporting the first clamping plate 510. At this time, there is no compressive stress between the slider 420 and the guiding component 500, and the slider 420 is not likely to be deformed or damaged. In this embodiment, both the first clamping plate 510 and the second clamping plate 530 are annular structures. The first clamping plate 510 is provided with a first guiding surface 511, and the second clamping plate 530 is provided with a second guiding surface 531. The angles between the first guiding surface 511 and the second guiding surface 531 and the vertical direction are both β. The first guiding surface 511, the second guiding surface 531 and the inner circle of the annular plate 520 enclose a guiding groove 541. The upper surface of the second slider 422 is in sliding fit with the first guiding surface 511, and the lower surface of the second slider 422 is in sliding fit with the second guiding surface 531. The supporting block 220 is provided with a supporting surface 221. In the open mold state, the supporting surface 221 abuts against the annular bottom surface of the first clamping plate 510 to support the first clamping plate 510. A guide post 250 and a guide rod 260 that are in sliding fit with the first clamping plate 510 are fixedly installed in the upper backing plate 200. By setting the guide post 250 and the guide rod 260, it is restricted that the first clamping plate 510 can only move up and down in the vertical direction relative to the upper backing plate 200, ensuring the stability when the guiding component 500 and the upper backing plate 200 move relative to each other.

[0053] By setting the first clamping plate 510, the annular plate 520 and the second clamping plate 530, the guiding component 500 with the guiding groove 541 is assembled by the three, which is beneficial to reducing the manufacturing difficulty of the guiding component 500, thereby reducing the production cost of the mold.

[0054] Embodiment 9: As an optimization of Embodiment 8, as Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 8and Figure 22 As shown in Figure 22 , the lower die includes a lower die base 600, a lower backing plate 700, and a lower template 800 that are sequentially arranged from bottom to top. A limit post 710 for supporting the second clamping plate 530 is fixedly installed on the lower backing plate 700. A receiving groove 820 adapted to the outer contour of the pump wheel housing 900 is provided at the top of the lower template 800, and the groove is provided on the groove wall of the receiving groove 820.

[0055] It should be noted that during the process of the upper die and the lower die being closed, when the second clamping plate 530 contacts the limit post 710, the limit post 710 supports the second clamping plate 530, causing the guiding assembly 500 to stop moving downward, while the first nitrogen spring 210 continues to move downward with the upper die base 100, and the first nitrogen spring 210 is compressed; during the process of the upper die and the lower die being separated, before the elastic potential energy stored in the compression of the first nitrogen spring 210 is completely released, that is, before the first nitrogen spring 210 returns to its initial length, the first nitrogen spring 210 pushes the first clamping plate 510, causing the second clamping plate 530 of the guiding assembly 500 to always abut against the limit post 710, and the upper die base 100 can only drive the upper backing plate 200 and the fixing assembly 300 to move upward.

[0056] By providing the receiving groove 820 adapted to the outer contour of the pump wheel housing 900, when the upper die and the lower die are closed, the receiving groove 820 can provide a receiving space for the pump wheel housing 900, and at least a part of the groove wall of the receiving groove 820 fits the outer contour of the pump wheel housing 900 to provide support for the pump wheel housing 900.

[0057] In this embodiment, the groove is a U-shaped groove 810, that is, the U-shaped groove 810 is provided on the groove wall of the receiving groove 820. A guiding post 230 is fixedly installed on the side of the upper backing plate 200 close to the lower backing plate 700, and a guiding sleeve 720 that is slidably and guidingly engaged with the guiding post 230 is fixedly installed on the side of the lower backing plate 700 close to the upper backing plate 200. Four guiding posts 230 and four guiding sleeves 720 are provided and correspond to each other one by one. The four guiding posts 230 are fixedly installed at the four corners of the upper backing plate 200, and the four guiding sleeves 720 are fixedly installed at the four corners of the lower backing plate 700. During the process of the upper die and the lower die being closed, the guiding sleeve 720 guides the guiding post 230, thereby ensuring the accuracy and stability of the upper die and the lower die being closed; Four first shock-absorbing posts 240 are also fixedly installed on the side of the upper backing plate 200 close to the lower backing plate 700, and the four first shock-absorbing posts 240 are symmetrically arranged with respect to the symmetry plane of the upper backing plate 200. Four second shock-absorbing posts 730 are fixedly installed on the side of the lower backing plate 700 close to the upper backing plate 200, and the second shock-absorbing posts 730 correspond to the first shock-absorbing posts 240 one by one. When the upper die and the lower die are closed, the first shock-absorbing posts 240 contact the second shock-absorbing posts 730 and undergo elastic deformation, and absorb the impact energy of the upper die and the lower die being closed, reducing the damage of the impact energy to the die, which is beneficial to improving the service life of the die.

[0058] Example 10: As an optimization of Example 9, as Figure 1 , Figure 4 , Figure 5 , Figure 8 and Figure 22 shown, a second nitrogen spring 740 is fixedly installed in the lower backing plate 700, a jacking column 830 is slidably installed in the lower template 800 and is drivingly connected to the telescopic end at the top of the second nitrogen spring 740, a positioning port 920 with a polygonal structure is penetrated through the center of the pump wheel housing 900, and a positioning head 840 adapted to the positioning port 920 is installed at the top of the jacking column 830.

[0059] It should be noted that the lower template 800 is of a cylindrical structure, a through groove 850 slidably matched with the jacking column 830 is penetrated through the center of the lower template 800, and the through groove 850 is communicated with the accommodating groove 820. In the open mold state, the second nitrogen spring 740 jacks up the jacking column 830, and at least a part of the jacking column 830 protrudes from the inner wall of the accommodating groove 820. When the pump wheel housing 900 to be grooved is placed on the jacking column 830, the positioning head 840 passes through the positioning port 920 of the pump wheel housing 900 to position the pump wheel housing 900, and the pump wheel housing 900 does not directly contact the lower template 800; During the process of the upper mold and the lower mold being closed, the upper mold moves down and jointly presses the pump wheel housing 900 to be grooved with the jacking column 830, and the downward movement of the upper mold will push the pump wheel housing 900 to be grooved, the jacking column 830 and the positioning head 840 to move down synchronously until the pump wheel housing 900 to be grooved fits against the groove wall of the accommodating groove 820. During this process, the second nitrogen spring 740 is compressed; during the process of the upper mold and the lower mold being separated, the second nitrogen spring 740 elongates, pushes the jacking column 830 to reset, and jacks up the pump wheel housing 900 after grooving is completed, and the pump wheel housing 900 and the lower template 800 of the lower mold can achieve automatic demolding.

[0060] In this embodiment, the value of N is the same as the number of blind grooves 910 required to be stamped on the outer ring of the pump wheel housing 900, all the blind grooves 910 are stamped in one time, the positioning port 920 is of a pentagonal structure, and a fillet is provided at the connection of adjacent sides. The positioning head 840 is a column with a pentagonal structure adapted to the positioning port 920, and a chamfer is provided at the top end of the positioning head 840. When the pump wheel housing 900 is placed on the jacking column 830, it is beneficial for the positioning head 840 to pass through the positioning port 920 to position the pump wheel housing 900, prevent the pump wheel housing 900 from rotating, and ensure the stability of the stamping process.

[0061] Example 11: As an optimization of Example 10, as Figure 4 , Figure 5 , Figure 6 and Figure 12As shown, a third nitrogen spring 340 is fixedly installed inside the fixed seat 310. The telescopic end at the bottom of the third nitrogen spring 340 is fixedly connected to a blank holding core 350 that is slidably connected to the fixed seat 310. The blank holding core 350 is located directly above the lifting post 830. A receiving hole 351 for accommodating the positioning head 840 is provided at the bottom of the blank holding core 350.

[0062] It should be noted that a placement groove 312 that slidably cooperates with the blank holding core 350 is provided at the center of the bottom of the fixed seat 310. In the open mold state, the third nitrogen spring 340 pushes at least a part of the blank holding core 350 out of the placement groove 312; during the process of closing the upper mold and the lower mold, and before the second clamping plate 530 abuts against the limit post 710, the blank holding core 350 first contacts the pump wheel housing 900 of the to-be-punched groove placed on the lifting post 830. The blank holding core 350 and the lifting post 830 jointly press the pump wheel housing 900 of the to-be-punched groove. As the mold closing progresses, both the second nitrogen spring 740 and the third nitrogen spring 340 are compressed under force, and the blank holding core 350 and the lifting post 830 keep pressing the pump wheel housing 900 of the to-be-punched groove to ensure the stability of the pump wheel housing 900 of the to-be-punched groove; The cross-sectional area of the telescopic end of the second nitrogen spring 740 is smaller than the cross-sectional area of the telescopic end of the third nitrogen spring 340. During the process of closing the upper mold and the lower mold, the compression amount of the second nitrogen spring 740 is greater than the compression amount of the third nitrogen spring 340; before the stamping forming end 411 of the stamping head 410 is inserted into the pump wheel housing 900, the lifting post 830 is completely pressed into the through groove 850. At this time, the outer contour of the pump wheel housing 900 fits with the receiving groove 820, and the lower template 800 and the lifting post 830 cooperate with the blank holding core 350 to jointly press the pump wheel housing 900. After that, the upper mold continues to move downward, and the stamping forming end 411 of the stamping head 410 is inserted into the pump wheel housing 900; During the process of separating the upper mold and the lower mold, the third nitrogen spring 340 elongates, pushing the blank holding core 350 to reset. The blank holding core 350 pushes the pump wheel housing 900 that has completed the punching groove to separate from the fixing assembly 300, and the pump wheel housing 900 and the fixing assembly 300 of the upper mold can achieve automatic demolding.

[0063] Embodiment 12: A method for using a tower side forming mold for a pump wheel housing, characterized by comprising the following steps: S1. Place the pump wheel housing 900; S2. The upper mold moves downward, and the blank holding core 350 and the lifting post 830 press the pump wheel housing 900; S3. The upper mold and the lower mold are closed, and the stamping head 410 is inserted into the pump wheel housing 900 along the extension direction of the guiding groove 541; S4. The upper mold and the lower mold are separated, and the stamping head 410 withdraws from the pump wheel housing 900 in the opposite direction to that in S3; S5. Take out the pump wheel housing 900.

[0064] It should be noted that in S1, when placing the pump wheel housing 900, the pump wheel housing 900 is placed on the lifting column 830 to provide support for the pump wheel housing 900, and the positioning head 840 passes through the positioning port 920 to restrict the pump wheel housing 900 from moving horizontally and rotating; in S2, during the downward movement of the upper die with the pressure core 350, the pressure core 350 abuts against the pump wheel housing 900, and the pump wheel housing 900 is restricted from moving vertically by the pressure core 350 and the lifting column 830; first, the pump wheel housing 900 is fixed by the positioning head 840, the lifting column 830 and the pressure core 350, and then the pump wheel housing 900 is stamped, which is beneficial to improving the stamping accuracy.

[0065] Example 13: As an optimization of Example 12, S3 includes the following steps: S31. The pressure core 350 moves downward to push the pump wheel housing 900 to fit against the wall of the receiving groove 820. S32. The second clamping plate 530 abuts against the limiting column 710. S33. The fixing seat 310 moves downward to push the slider 420 and the stamping head 410 to move along the extension direction of the guiding groove 541, and the stamping forming end 411 of the stamping head 410 is pushed into the pump wheel housing 900.

[0066] It should be noted that in S31, both the second nitrogen spring 740 and the third nitrogen spring 340 are compressed. In S32, the pressure core 350 stops moving, and the guiding assembly 500 continues to move downward with the upper die until the second clamping plate 530 abuts against the limiting column 710. During this process, the third nitrogen spring 340 is compressed. S31 and S32 can be completed simultaneously, that is, when the pressure core 350 moves downward with the upper die to push the pump wheel housing 900 downward so that the pump wheel housing 900 fits against the wall of the receiving groove 820, the second clamping plate 530 completes the abutment with the limiting column 710. In S33, both the first nitrogen spring 210 and the third nitrogen spring 340 are compressed. The fixing seat 310 squeezes the first pressure receiving surface 4212 of the first slider 421 through the first extrusion surface 3111 of the limiting groove 311, thereby pushing the first slider 421 and the second slider 422 to move. Under the guiding action of the guiding groove 541 on the second slider 422, both the first slider 421 and the second slider 422 move along the extension direction of the guiding groove 541, and the second slider 422 moves in the direction of deepening into the guiding groove 541. While the first slider 421 moves synchronously with the second slider 422, it slides relative to the fixing seat 310. The first slider 421 drives the stamping head 410 to move synchronously, so that the stamping forming end 411 of the stamping head 410 is pushed into the pump wheel housing 900 along the direction perpendicular to the inner wall of the outer circle of the pump wheel housing 900, and a blind groove 910 is stamped on the pump wheel housing 900.

[0067] Embodiment 14: As an optimization of Embodiment 13, S4 includes the following steps: S41. The fixing component 300 moves upward, the second clamping plate 530 remains in contact with the limit post 710, the limit ring 320 pushes the slider 420 and the stamping head 410 to move in opposite directions in S33, and the stamping end 411 of the stamping head 410 exits from the clamping groove of the pump wheel housing 900; S42. The second clamping plate 530 separates from the limit post 710; S43. The jacking column 830 pushes the pump wheel housing 900 upward, and the pump wheel housing 900 separates from the accommodating groove 820.

[0068] It should be noted that in S41, during the upward movement of the fixing component 300, both the first nitrogen spring 210 and the third nitrogen spring 340 elongate. The first nitrogen spring 210 pushes the guiding component 500 to keep the second clamping plate 530 in contact with the limit post 710, and the third nitrogen spring 340 pushes the pressure core 350 to keep the pressure core 350 in contact with the pump wheel housing 900, and the pump wheel housing 900 keeps fitting with the groove wall of the accommodating groove 820. The clamping groove is a blind groove 910, that is, the stamping end 411 of the stamping head 410 exits from the blind groove 910 of the pump wheel housing 900; In S41, the limit ring 320 squeezes the second pressure-receiving surface 4213 of the first slider 421 through the second squeezing surface 321, thereby pushing the first slider 421 and the second slider 422 to move. Under the guiding action of the guiding groove 541 on the second slider 422, both the first slider 421 and the second slider 422 move along the extending direction of the guiding groove 541, and the second slider 422 moves in the direction of exiting from the guiding groove 541. While the first slider 421 moves synchronously with the second slider 422, it relatively slides with the fixed seat 310. The first slider 421 drives the stamping head 410 to move synchronously, so that the stamping end 411 of the stamping head 410 exits from the blind groove 910 of the pump wheel housing 900 along the direction perpendicular to the inner wall of the outer circle of the pump wheel housing 900; In S42, the pressure core 350 remains stationary and the third nitrogen spring 340 elongates. In S43, both the second nitrogen spring 740 and the third nitrogen spring 340 elongate until the pump wheel housing 900 separates from the pressure core 350. S42 and S43 can start simultaneously, that is, when the second clamping plate 530 separates from the limit post 710, the jacking column 830 jacks up the pump wheel housing 900 to separate the pump wheel housing 900 from the accommodating groove 820.

[0069] The embodiments of the invention have been described above in conjunction with the accompanying drawings. However, these embodiments are not limited to the specific implementation manners described above. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of these embodiments, those of ordinary skill in the art can also make many forms without departing from the purpose of these embodiments and the scope protected by the claims, and all of them fall within the protection scope of these embodiments.

Claims

1. A tower side forming die for a pump impeller housing, comprising: The upper die and the lower die, characterized in that the upper die comprises an upper die base (100), an upper backing plate (200) and a fixing component (300) arranged in sequence from top to bottom, a punch component (400) is slidably arranged on the fixing component (300), a guiding component (500) connected to the upper backing plate (200) is arranged on the outer periphery of the fixing component (300), and a variable spacing is provided between the guiding component (500) and the upper backing plate (200); The guiding component (500) is provided with a guiding structure slidably matched with the punch component (400), the extending direction of the guiding structure is perpendicular to the inner wall of the outer ring of the pump wheel housing (900), the lower die is provided with a groove matched with the punch component (400), when the upper die and the lower die are closed, the fixing component (300) drives the punch component (400) to move along the extending direction of the guiding structure, and a clamping groove is punched out on the inner wall of the outer ring of the pump wheel housing (900).

2. The tower side forming die for a pump impeller housing according to claim 1, characterized in that, The groove is arranged as a U-shaped groove (810), the clamping groove is a blind groove (910), and the punch component (400) is matched with the U-shaped groove (810) to punch and form the blind groove (910).

3. A tower side forming die for a pump impeller housing according to claim 1 or 2, characterized in that, N groups of the punch components (400) are circumferentially and arrayedly distributed around the central line of the fixing component (300).

4. The tower side forming die for a pump wheel housing according to claim 3, characterized in that The punch component (400) comprises a punching head (410) and an L-shaped slider (420), and the punching head (410) is detachably installed on the slider (420).

5. A kind of tower side forming die for pump wheel housing according to claim 4, characterized in that The punching head (410) is provided with a punching and forming end (411), the punching and forming end (411) is inclined, the slider (420) is provided with a mounting groove (4211), and the punching head (410) is installed in the mounting groove (4211) through a bolt.

6. The tower side forming die for a pump impeller housing according to claim 5, characterized in that, The fixing component (300) is provided with N limiting grooves (311), the guiding structure is arranged as a guiding groove (541), the slider (420) comprises a first slider (421) and a second slider (422), the first slider (421) is slidably connected with the limiting groove (311), the second slider (422) is slidably connected with the guiding groove (541), and the mounting groove (4211) is arranged on the first slider (421).

7. A pump impeller housing tower side forming die according to claim 6, characterized in that, The fixing component (300) comprises a fixing seat (310) and a limiting ring (320), the fixing seat (310) is fixedly connected to the bottom surface of the upper backing plate (200), the limiting ring (320) is arranged between the fixing seat (310) and the guiding component (500), and the limiting ring (320) is fixedly connected with the fixing seat (310) through a connecting column (330), the limiting groove (311) is arranged on the outer ring of the fixing seat (310), and the inner ring of the limiting ring (320) is slidably attached to the first slider (421).

8. A pump wheel housing tower side forming die according to claim 7, characterized in that, A first nitrogen spring (210) is fixedly installed inside the upper backing plate (200). The guiding assembly (500) includes a first clamping plate (510), an annular plate (520), and a second clamping plate (530) that are sequentially arranged from top to bottom and enclose to form the guiding groove (541). The first clamping plate (510) is connected to the telescopic end at the bottom of the first nitrogen spring (210), and the upper backing plate (200) is fixedly installed with a supporting block (220) for supporting the first clamping plate (510).

9. A pump impeller housing tower side forming die according to claim 8, characterized in that, The lower die includes a lower die base (600), a lower backing plate (700), and a lower template (800) that are sequentially arranged from bottom to top. A limiting post (710) for supporting the second clamping plate (530) is fixedly installed on the lower backing plate (700). A receiving groove (820) adapted to the outer contour of the pump wheel housing (900) is provided at the top of the lower template (800), and the groove is provided on the groove wall of the receiving groove (820).

10. A kind of tower side forming die for pump wheel housing according to claim 9, characterized in that, A second nitrogen spring (740) is fixedly installed inside the lower backing plate (700). A jacking column (830) that is slidably installed inside the lower template (800) and is drivingly connected to the telescopic end at the top of the second nitrogen spring (740) is provided. A positioning port (920) with a polygonal structure is provided through the center of the pump wheel housing (900), and a positioning head (840) adapted to the positioning port (920) is installed at the top of the jacking column (830).

11. A pump impeller housing tower side forming die according to claim 10, characterized in that, A third nitrogen spring (340) is fixedly installed inside the fixed seat (310). A pressure core (350) that is drivingly connected to the telescopic end at the bottom of the third nitrogen spring (340) and is slidably connected to the fixed seat (310) is provided. The pressure core (350) is located directly above the jacking column (830), and a receiving hole (351) for receiving the positioning head (840) is provided at the bottom of the pressure core (350).

12. A method for using a tower side forming die for a pump impeller housing, characterized in that, It is a method for using a tower side forming die for a pump wheel housing according to claim 11, including the following steps: S1. Place the pump wheel housing (900); S2. The upper die moves downward, and the pressure core (350) and the jacking column (830) clamp the pump wheel housing (900); S3. The upper die and the lower die are closed, and the stamping head (410) is pushed into the pump wheel housing (900) along the extending direction of the guiding groove (541); S4. The upper die and the lower die are separated, and the stamping head (410) exits the pump wheel housing (900) in the opposite direction to that in S3; S5. Take out the pump wheel housing (900).

13. The usage method of a pump impeller housing tower side forming die according to claim 12, characterized in that, The S3 includes the following steps: S31. The pressure core (350) moves downward, pushing the pump wheel housing (900) to fit against the groove wall of the receiving groove (820); S32. The second clamping plate (530) abuts against the limiting post (710); S33. The fixing component (300) moves downward, and the fixing seat (310) pushes the slider (420) and the stamping head (410) to move along the extending direction of the guiding groove (541), and the stamping end (411) of the stamping head (410) is pushed into the pump wheel housing (900).

14. The usage method of a pump wheel housing tower side forming die according to claim 13, characterized in that, The S4 includes the following steps: S41. The fixing component (300) moves upward, the second clamping plate (530) remains in contact with the limiting post (710), the limiting ring (320) pushes the slider (420) and the stamping head (410) to move in the opposite direction in S33, and the stamping end (411) of the stamping head (410) withdraws from the clamping groove of the pump wheel housing (900); S42. The second clamping plate (530) separates from the limiting post (710); S43. The jacking post (830) pushes the pump wheel housing (900) upward, and the pump wheel housing (900) separates from the accommodating groove (820).

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