Impeller forming device and process for a water ring vacuum pump

Abstract

The application relates to a vane wheel forming device of a water ring vacuum pump and relates to the technical field of punch forming. The vane wheel forming device comprises a punch press, a punch platform for placing workpieces is arranged on the punch press, a punch head is slidably arranged above the punch platform, a plurality of punch cutter groups are installed on the punch head, the punch cutter groups are arranged correspondingly to the grooves between vane blades, the punch cutter group comprises two side cutters and an arc-shaped cutter which are installed on the punch head, the two side cutters and the arc-shaped cutter are spliced into the shape of the groove between the vane blades, and the production efficiency of the vane wheel is improved.

Description

Technical Field

[0001] This application relates to the field of stamping, and in particular to an impeller forming apparatus and process for a water ring vacuum pump. Background Technology

[0002] The impeller of a water ring vacuum pump is its most core and critical operating component. Its design and operating conditions directly determine the pump's performance (pumping speed, ultimate vacuum), efficiency, reliability, and lifespan.

[0003] Existing impeller production methods typically involve turning or casting, both of which are time-consuming and inefficient. Summary of the Invention

[0004] To improve the production efficiency of impellers, this application provides an impeller forming device for a water ring vacuum pump.

[0005] The impeller forming device for a water ring vacuum pump provided in this application adopts the following technical solution:

[0006] An impeller forming device for a water ring vacuum pump includes a stamping machine. The stamping machine is equipped with a stamping platform for placing workpieces. A stamping head is slidably disposed above the stamping platform. A plurality of stamping knife sets are mounted on the stamping head. The stamping knife sets are configured to correspond to the grooves between the impeller blades. Each stamping knife set includes two side blades and one arc-shaped blade mounted on the stamping head. The two side blades and one arc-shaped blade are joined together to form the shape of the grooves between the impeller blades.

[0007] By adopting the above technical solution, the impeller production by stamping is faster and more efficient than turning and casting, thus improving the production efficiency of the impeller.

[0008] Optionally, abutment pieces are provided inside the stamping cutter group and between the stamping cutter groups. The abutment pieces face towards or away from the stamping head. An elastic element is provided between the abutment piece and the stamping head. The elastic element drives the abutment piece to slide away from the stamping head.

[0009] Optionally, a fixing component is installed on the stamping platform. The fixing component includes a base and a fixing ring. The base is detachably installed on the stamping platform, and the fixing ring is fixed to the base. The inner diameter of the fixing ring abuts against the outer diameter of the impeller blank.

[0010] Optionally, the fixing component further includes a fixing rod, which is vertically installed at the center of the base, and the fixing rod is a heating rod.

[0011] Optionally, the stamping platform is provided with a horizontal cutting assembly, which includes a sliding table, horizontal cutters, and a driving component. The sliding table is installed on the stamping platform around the fixed ring. Several horizontal cutters are provided, and all horizontal cutters are slidably disposed on the sliding table. The number of horizontal cutters is the same as the number of slots between the impeller blades and is disposed between the impeller blades. The driving component drives all horizontal cutters to slide synchronously on the sliding table at the same time.

[0012] Optionally, the driving component includes a drive motor, a drive gear, a drive plate, and a drive rack. The drive motor is mounted on a stamping platform, the drive gear is fixed on the shaft of the drive motor, the drive plate is rotatably mounted on the stamping platform, and the drive rack is fixed on a horizontal cutter. A threaded groove is provided on one side of the drive plate, which meshes with the drive rack. A power tooth is fixed on the other side of the drive plate, which meshes with the drive gear.

[0013] Optionally, a fixed seat is fixedly provided on the sliding platform, the sliding platform is installed on the stamping platform through the fixed seat, and the drive plate is rotatably disposed on the fixed seat.

[0014] Optionally, a cover is installed on the fixed base, and the cover covers the drive gear, drive plate and drive rack.

[0015] Optionally, a limit switch is installed on the outer wall of the fixed ring, and the limit switch is electrically connected to the drive motor.

[0016] A process for forming the impeller of a water ring vacuum pump, using a forming device, includes the following steps:

[0017] S1: Making a blank: Place an aluminum sheet with a thickness that meets the standard and a surface area larger than the impeller diameter on a stamping machine and stamp it to make an impeller blank with a central mounting hole.

[0018] S2: Installation: Install the impeller blank on the stamping platform, insert the fixing rod into the hole in the center of the blank and make the fixing ring abut against the outer wall of the impeller blank.

[0019] S3: Heating, heating the impeller blank to raise its temperature;

[0020] S4: Punching, driving the punch head to slide, so that the punching knife group cuts the blank in the circumferential direction. When the punching knife group cuts to a certain depth, the driving horizontal cutter is inserted into the impeller blank so that the part to be removed is completely removed from the impeller blank.

[0021] S5: Retract the blade, drive the stamping head to slide away from the impeller blank so that the stamping blade assembly disengages from the impeller blank, and at the same time disengage the horizontal cutter from the impeller blank.

[0022] S6: Unloading. The stamped and cut impeller is removed from the fixed ring, and the scrap material generated by the cutting groove is removed to complete the forming of the impeller.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Compared with turning and casting, the production speed of impellers by stamping is faster and the production efficiency is higher, thus improving the production efficiency of impellers;

[0025] 2. When the stamping cutter set performs stamping and cutting on the impeller blank, the abutment plate abuts against the area of ​​the impeller blank that does not need to be cut. When the depth of the groove between the impeller blades is deep, the size of the cutting tool of the stamping cutter set will also be long. When the cutting tip cuts into the impeller blank, it is prone to breakage due to bending force. When the cutting tool penetrates into the impeller blank, the abutment plate can slide and abut against the side wall of the cutting tool, which can improve the support force for the stamping cutter set, thereby reducing the probability of the stamping cutter set breaking due to force during the stamping and cutting process. At the same time, during the stamping and cutting process, the abutment plate abuts against the impeller blank and can apply pressure to the impeller blank, reducing the probability of the impeller blank vibrating due to cutting, thereby improving the accuracy of stamping and cutting.

[0026] 3. The retaining ring can abut against the outside of the impeller blank, thereby restricting the slippage of the impeller blank. When performing stamping and grooving, it can reduce the probability of slippage of the impeller blank leading to cutting misalignment. At the same time, the stamping knife set adopts the extrusion cutting method when cutting the impeller blank. Under this method, the non-cutting area of ​​the impeller blank is prone to deformation due to extrusion. The retaining ring can also reduce the probability of deformation of the non-cutting area of ​​the impeller blank due to extrusion force during cutting by abutting.

[0027] 4. The fixing rod is inserted into the middle hole of the impeller blank to fix the impeller blank. The heating rod can raise the temperature of the impeller blank. The temperature increase of the impeller blank can make the impeller blank slightly softer and reduce its hardness, thus making the cutting of the impeller blank easier.

[0028] 5. When the impeller requires a bottom disc, the stamping cutter set cannot directly cut through the impeller blank. After the stamping cutter set cuts, the bottom of the waste material in the impeller blade groove is still connected to the impeller. The drive unit drives all horizontal cutters to cut the bottom of the waste material at the connection between the impeller and the impeller, so that the waste material is completely removed from the impeller. There is no need for subsequent manual or other equipment to remove the waste material, which facilitates the production of the impeller. The fixed ring has holes for the horizontal cutter to pass through. The height of the holes is set for the horizontal cutter. The height of the horizontal cutter is set according to the required thickness of the bottom disc.

[0029] 6. When the stamping knife assembly completes the stamping and cutting of the impeller blank, the trigger rod abuts against the limit switch to trigger the limit switch and start the drive motor, realizing the horizontal cutting of the impeller blank by the horizontal cutting component. After the horizontal cutting is completed, the stamping head moves away from the stamping platform, the trigger rod disengages from the impeller blank, the limit switch is released, thereby driving the drive motor to drive the horizontal cutter to reset, and then the limit switch is disconnected. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the structure of the stamping knife assembly in an embodiment of this application.

[0032] Figure 3 This is a structural schematic diagram of the stamping knife assembly and the fixing component according to an embodiment of this application.

[0033] Figure 4 This is a cross-sectional view of the structure of the fastener in an embodiment of this application.

[0034] In the diagram, 0 is the impeller blank; 1 is the stamping machine; 2 is the stamping platform; 3 is the stamping head; 4 is the stamping knife assembly; 41 is the side knife; 42 is the arc-shaped knife; 5 is the abutment piece; 6 is the elastic component; 7 is the fixing component; 71 is the base; 72 is the fixing ring; 73 is the fixing rod; 8 is the horizontal cutting assembly; 81 is the sliding table; 82 is the horizontal cutter; 83 is the driving component; 831 is the drive motor; 832 is the drive gear; 833 is the drive plate; 834 is the drive rack; 9 is the threaded groove; 10 is the power gear; 11 is the fixed seat; 12 is the cover; 13 is the limit switch; and 14 is the trigger rod. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 The present application will be further described with reference to specific embodiments:

[0036] First, it should be noted that in the description of this application, the use of directional terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for descriptive purposes and do not indicate or imply that the device or component 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 this application. Furthermore, the use of numerical quantifiers such as "first," "second," and "third" is for descriptive purposes only and should not be construed as indicating or implying relative importance. Additionally, in this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, interference fits, transition fits, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium. Therefore, those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] This application discloses an impeller forming apparatus for a water ring vacuum pump, referring to... Figure 1 and Figure 2 The system includes a stamping machine 1. In this embodiment, the stamping machine 1 is the body of a common stamping forming equipment in the prior art. The stamping machine 1 is provided with a stamping platform 2 for placing workpieces. A stamping head 3 is slidably arranged above the stamping platform 2. The stamping head 3 is driven by a hydraulic cylinder to slide directly above the stamping platform 2 in a direction that is closer to or farther away from the stamping platform 2. Several stamping knife sets 4 are installed on the stamping head 3. The stamping knife sets 4 are set according to the number of slots between the impeller blades. In this embodiment, a tool holder is detachably installed on the stamping head 3. All stamping knife sets 4 can be detachably installed on the tool holder. The stamping knife set 4 includes two side cutters 41 and one arc cutter 42 installed on the stamping head 3 through the tool holder. Both the side cutters 41 and the arc cutter 42 are made of SKD11 steel. The two side cutters 41 and the arc cutter 42 are spliced ​​to form the shape of the slots between the impeller blades. Compared with turning and casting, the production speed of impellers by stamping is faster and the production efficiency is higher, thus improving the production efficiency of impellers.

[0038] Reference Figure 1 and Figure 2Abutment pieces 5 are provided inside the stamping cutter group 4 and between the stamping cutter groups 4. The abutment pieces 5 fill the part that needs to be retained during the stamping and cutting of the impeller. The abutment pieces 5 face the direction of approaching or away from the stamping head 3. A spring 6 is provided between the abutment pieces 5 and the stamping head 3. In this embodiment, the spring 6 is a spring. The spring 6 drives the abutment pieces 5 to slide away from the stamping head 3. When the stamping cutter group 4 stamps and cuts the impeller blank 0, the abutment pieces 5 abut against the area of ​​the impeller blank 0 that does not need to be cut. When the depth of the groove between the impeller blades is relatively deep, the stamping cutter group The cutting tool of 4 is also relatively long. When the cutting tip cuts into the impeller blank 0, it is subject to bending force, which can easily cause the cutting tool to break. The abutment piece 5 can slide and abut against the side wall of the cutting tool when the cutting tool penetrates into the impeller blank 0, thereby increasing the support force for the stamping tool assembly 4 and reducing the probability of the stamping tool assembly 4 breaking due to force during the stamping and cutting process. At the same time, during the stamping and cutting process, the abutment piece 5 abuts against the impeller blank 0 and can apply pressure to the impeller blank 0, reducing the probability of the impeller blank 0 vibrating due to cutting, thereby improving the accuracy of stamping and cutting.

[0039] Reference Figure 1 , Figure 3 and Figure 4 A fixing component 7 is installed on the stamping platform 2. The fixing component 7 includes a base 71 and a fixing ring 72. The base 71 is detachably installed on the stamping platform 2, and the fixing ring 72 is fixed to the base 71. The inner diameter of the fixing ring 72 abuts against the outer diameter of the impeller blank 0. The fixing ring 72 can abut against the outside of the impeller blank 0 to restrict the slippage of the impeller blank 0. When performing stamping and grooving, it can reduce the probability of slippage of the impeller blank 0 leading to cutting misalignment. At the same time, the stamping knife set 4 uses a compression cutting method when cutting the impeller blank 0. Under this method, the non-cutting area of ​​the impeller blank 0 is prone to deformation due to compression. The fixing ring 72 can also reduce the compression force on the non-cutting area of ​​the impeller blank 0 during cutting by abutting against it. The probability of deformation; the fixing component 7 also includes a fixing rod 73, which is vertically installed at the center of the base 71. The fixing rod 73 is a heating rod, which is connected to the power supply. After being powered on, the heating rod generates high temperature and transfers the high temperature to the impeller blank 0. In this embodiment, the impeller blank 0 is a cylindrical aluminum block. The aluminum block is fixed in overall diameter by stamping and cutting and a central hole is stamped out before the groove between the impeller blades is removed. The fixing rod 73 is inserted into the middle hole of the impeller blank 0 to fix the impeller blank 0. The heating rod can increase the temperature of the impeller blank 0. The temperature increase of the impeller blank 0 can make the hardness of the impeller blank 0 slightly softer, thus making the cutting of the impeller blank 0 easier.

[0040] Reference Figure 1 , Figure 3 and Figure 4A horizontal cutting assembly 8 is provided on the stamping platform 2. The horizontal cutting assembly 8 includes a sliding table 81, horizontal cutters 82, and a driving component 83. The sliding table 81 is installed on the stamping platform 2 around the fixing ring 72. Several horizontal cutters 82 are provided, all of which are slidably mounted on the sliding table 81. The number of horizontal cutters 82 is the same as the number of grooves between the impeller blades, and their cross-sectional shape is the same as the shape of the grooves between the impeller blades, and they are arranged corresponding to the impeller blades. The driving component 83 drives all the horizontal cutters 82 to slide synchronously on the sliding table 81. When the impeller needs to be cut at the bottom... When the stamping cutter group 4 is in operation, it cannot directly cut through the impeller blank 0. After the stamping cutter group 4 cuts, the bottom of the waste material in the impeller blade groove is still connected to the impeller. The drive unit 83 drives all the horizontal cutters 82 to cut the bottom of the waste material at the connection with the impeller, so that the waste material is completely separated from the impeller. There is no need for subsequent manual or other equipment to remove the waste material, which facilitates the production of the impeller. The fixed ring 72 has a hole for the horizontal cutter 82 to pass through. The height of the hole is set for the horizontal cutter 82. The height of the horizontal cutter 82 is set according to the required thickness of the bottom wheel.

[0041] Reference Figure 1 , Figure 3 and Figure 4 The driving component 83 includes a drive motor 831, a drive gear 832, a drive plate 833, and a drive rack 834. The drive motor 831 is mounted and fixed on the stamping platform 2. The drive gear 832 is fixed on the shaft of the drive motor 831. The drive plate 833 is rotatably mounted on the stamping platform 2. The drive rack 834 is fixed on the horizontal cutter 82. An annular threaded groove 9 is formed on one side of the drive plate 833, which meshes with the drive rack 834. A power gear 10 is fixed on the other side of the drive plate 833, which meshes with the drive gear 832. The drive gear 832 is a bevel gear, and the drive gear forms an annular gear ring structure on the drive plate 833. In this embodiment, the drive motor 831... 31. A stepper motor with forward and reverse rotation function is selected. The forward rotation of the drive motor 831 drives the drive gear 832 to rotate. The drive gear 832 drives the forward drive plate 833 to rotate through the channel teeth. The rotation of the drive plate 833 drives the drive rack 834 to rotate through the annular threaded groove 9. This allows all horizontal cutters 82 to slide synchronously into the fixing ring 72 like a three-jaw chuck to cut the impeller blank 0. When the drive motor 831 reverses, the drive gear 832 drives the drive teeth to make the drive plate 833 rotate in the opposite direction. The rotation of the drive plate 833 drives the drive rack 834 to rotate through the annular threaded groove 9. This allows all horizontal cutters 82 to slide away from the impeller blank 0 and away from the fixing ring 72.

[0042] Reference Figure 1 , Figure 3 and Figure 4A fixed base 11 is bolted to the sliding table 81, and the sliding table 81 is bolted to the fixed base 11, thereby being mounted on the stamping platform 2 via the fixed base 11. The drive plate 833 is rotatably mounted on the fixed base 11. The fixed base 11 facilitates the installation and fixation of the horizontal cutting component 8. A cover 12 is detachably mounted on the fixed base 11, covering the drive gear 832, drive plate 833, and drive rack 834. The cover 12 reduces the entry of dust and debris into the various components of the drive component 83. The probability of debris at the connection point is reduced, thus minimizing the impact of debris on the drive component 83 and ensuring its normal operation. The detachable cover 12 provides pre-disassembly capability, facilitating maintenance of the drive component 83 in case of malfunction. A limit switch 13 is installed on the outer wall of the fixing ring 72, which is electrically connected to the drive motor 831. A trigger rod 14 is installed on the stamping head 3. When the stamping knife group 4 completes the stamping and cutting of the impeller blank 0, the trigger rod 14 abuts against the limit switch 13, triggering the limit switch 13 to... The drive motor 831 starts, enabling the horizontal cutting component 8 to horizontally cut the impeller blank 0. After the horizontal cutting is completed, the stamping head 3 moves away from the stamping platform 2, and the trigger rod 14 disengages from the impeller blank 0, releasing the switch. This causes the drive motor 831 to drive the horizontal cutter 82 to reset, and then disconnects the limit switch 13. In this embodiment, the limit switch 13 has three positions. When the trigger rod 14 abuts against the trigger, it enters the first position. At this time, the drive motor 831 drives the horizontal cutter 82 to cut the impeller blank 0. When the trigger rod 14... When the limit switch 13 is disengaged, the limit switch 13 rebounds to trigger the second position. At this time, the drive motor 831 starts and drives the horizontal cutter 82 to slide and reset, disengaging from the impeller blank 0. After the horizontal cutter 82 resets, the limit switch 13 rebounds to the third position, disconnecting the circuit of the drive motor 831. The second and third positions of the limit switch 13 can be achieved by a timer or by using an electromagnet in conjunction with a sensor. For example, after the infrared sensor detects that the horizontal cutter 82 has reset, the central control device controls the electromagnet to disconnect the circuit, thereby resetting the switch head of the limit switch 13.

[0043] A process for forming an impeller of a water ring vacuum pump, using a forming device, includes the following steps: S1: Making a blank, placing an aluminum sheet with a thickness and surface area larger than the impeller diameter on a stamping machine and stamping to form an impeller blank 0 with a central mounting hole; S2: Installing, installing the impeller blank 0 on a stamping platform 2, inserting a fixing rod into the mounting hole in the center of the blank and having a fixing ring 72 abut against the outer wall of the impeller blank 0; S3: Heating, heating the impeller blank 0. In this embodiment, an aluminum impeller is produced, so the heating temperature needs to be controlled between 200℃ and 260℃ to avoid the temperature from exceeding 300℃, which could lead to… S4: Punching: Drive the punch head 3 to slide, so that the punching knife group 4 cuts the blank circumferentially. When the punching knife group 4 cuts to a certain depth, drive the horizontal cutter 82 to insert into the impeller blank 0 so that the part to be cut is completely removed from the impeller blank 0; S5: Retraction: Drive the punch head 3 to slide away from the impeller blank 0 so that the punching knife group 4 is removed from the impeller blank 0, and at the same time, the horizontal cutter 82 is removed from the impeller blank 0; S6: Unloading: Take out the punched and cut impeller from the fixing ring 72, and remove the scrap generated by the cutting groove to complete the forming of the impeller.

[0044] The implementation principle of this application embodiment is as follows: A suitable stamping knife set 4 is selected according to the shape and number of grooves between the impeller blades, and the stamping knife set 4 is installed on the stamping head 3. Then, a suitable fixing member 7 is selected and installed on the stamping platform 2. The position of the limit switch 13 is adjusted according to the size of the stamping knife set 4 to ensure that the trigger rod 14 can abut against the limit switch 13 when the stamping of the stamping knife set 4 is completed. The impeller blank 0 is installed on the stamping platform 2, so that the fixing rod is inserted into the mounting hole in the center of the blank and the fixing ring 72 abuts against the blade. The outer wall of the impeller blank 0 is heated, and the stamping head 3 is driven to slide, so that the stamping knife group 4 cuts the blank circumferentially. When the stamping knife group 4 cuts to a certain depth, the horizontal cutter 82 is driven to insert into the impeller blank 0 so that the part to be removed is completely removed from the impeller blank 0. Then the stamping head 3 is driven to slide away from the impeller blank 0 so that the stamping knife group 4 is removed from the impeller blank 0. At the same time, the horizontal cutter 82 is removed from the impeller blank 0. Finally, the stamped impeller and the waste are taken out by the clamping tool and placed to cool down, thus completing the stamping of the impeller.

[0045] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. An impeller forming apparatus for a water ring vacuum pump, comprising a stamping machine (1), wherein a stamping platform (2) for placing a workpiece is provided on the stamping machine (1), and a stamping head (3) is slidably disposed above the stamping platform (2), characterized in that: The stamping head (3) is equipped with several stamping knife sets (4), which are set to correspond to the slots between the impeller blades. Each stamping knife set (4) includes two side blades (41) and one arc-shaped blade (42) mounted on the stamping head (3). The two side blades (41) and one arc-shaped blade (42) are spliced ​​together to form the shape of the slots between the impeller blades. A fixing component (7) is installed on the stamping platform (2). The fixing component (7) includes a base (71) and a fixing ring (72). The base (71) is detachably installed on the stamping platform (2), and the fixing ring (72) is fixed to the base (71). The inner diameter of the fixing ring (72) abuts against the blade. The outer diameter of the wheel blank (0); a horizontal cutting assembly (8) is provided on the stamping platform (2). The horizontal cutting assembly (8) includes a sliding table (81), a horizontal cutter (82) and a driving component (83). The sliding table (81) is installed on the stamping platform (2) around the fixing ring (72). Several horizontal cutters (82) are provided. The horizontal cutters (82) are all slidably set on the sliding table (81). The number of horizontal cutters (82) is the same as the number of grooves between the impeller blades and is set between the impeller blades. The driving component (83) drives all the horizontal cutters (82) to slide synchronously on the sliding table (81).

2. The impeller forming device for a water ring vacuum pump according to claim 1, characterized in that: Abutting pieces (5) are provided inside the stamping knife group (4) and between the stamping knife groups (4). The abutting pieces (5) face the direction of approaching or moving away from the stamping head (3). A spring member (6) is provided between the abutting piece (5) and the stamping head (3). The spring member (6) drives the abutting piece (5) to slide away from the stamping head (3).

3. The impeller forming device for a water ring vacuum pump according to claim 2, characterized in that: The fixing component (7) also includes a fixing rod (73), which is vertically installed at the center of the base (71) and is a heating rod.

4. The impeller forming device for a water ring vacuum pump according to claim 3, characterized in that: The driving component (83) includes a driving motor (831), a driving gear (832), a driving plate (833), and a driving rack (834). The driving motor (831) is mounted on the stamping platform (2). The driving gear (832) is fixed on the rotating shaft of the driving motor (831). The driving plate (833) is rotatably mounted on the stamping platform (2). The driving rack (834) is fixed on the horizontal cutter (82). A threaded groove (9) is provided on one side of the driving plate (833), and the threaded groove (9) meshes with the driving rack (834). A power tooth (10) is fixed on the other side of the driving plate (833), and the power tooth (10) meshes with the driving gear (832).

5. The impeller forming device for a water ring vacuum pump according to claim 4, characterized in that: The sliding table (81) is fixedly provided with a fixed seat (11), and the sliding table (81) is installed on the stamping platform (2) through the fixed seat (11). The drive plate (833) is rotatably disposed on the fixed seat (11).

6. The impeller forming device for a water ring vacuum pump according to claim 5, characterized in that: A cover (12) is installed on the fixed base (11), and the cover (12) covers the drive gear (832), drive plate (833) and drive rack (834).

7. The impeller forming device for a water ring vacuum pump according to claim 6, characterized in that: A limit switch (13) is installed on the outer wall of the fixed ring (72), and the limit switch (13) is electrically connected to the drive motor (831).

8. A process for forming an impeller of a water ring vacuum pump, using the forming apparatus described in claim 7, comprising the following steps: S1: Make a blank by placing an aluminum sheet with a thickness and surface area larger than the impeller diameter on a stamping machine and stamping it to make an impeller blank (0) with a central mounting hole. S2: Installation: Install the impeller blank (0) on the stamping platform (2), insert the fixing rod into the hole in the center of the blank and make the fixing ring (72) abut against the outer wall of the impeller blank (0); S3: Heating, heating the impeller blank (0) to increase its temperature; S4: Punching, drive the punch head (3) to slide, so that the punching knife group (4) cuts the blank in the circumferential direction. When the punching knife group (4) cuts to a certain depth, drive the horizontal cutter (82) to insert into the impeller blank (0) so that the part to be cut off is completely removed from the impeller blank (0). S5: Retract the blade, drive the stamping head (3) to slide away from the impeller blank (0) so that the stamping blade assembly (4) is disengaged from the impeller blank (0), and at the same time, the horizontal cutter (82) is disengaged from the impeller blank (0). S6: Unloading, take the stamped and cut impeller out from the fixed ring (72), and remove the scrap material generated by the cutting groove to complete the forming of the impeller.

Images