Stamping progressive die for vertical multi-stage pump blade

Abstract

The invention relates to a vertical multistage pump blade stamping progressive die which comprises an upper die body and a lower die body, the upper die body comprises a discharging plate, a discharging plate guide sleeve, an inner guide column, an upper die base and an upper padding plate, the upper padding plate and a fixing plate are fixed to the upper die base, and the inner guide column, a waste male die and a round hole male die are installed in the fixing plate and are in clearance fit with the discharging plate. The discharging plate guide sleeve and the guide nail are installed in the discharging plate, the discharging plate and the height stopping plate are connected into a whole and hung on the upper end face of the upper padding plate, and the rectangular spring is installed between the upper die base and the height stopping plate; the lower die comprises a round hole insert, a lower die base and a lower die plate, the round hole insert and the female die guide sleeve are mounted and embedded in the lower die plate, the lower die plate is fixed on the lower die base, the lower die base, the foot pads and the bottom plate are fixed into a whole, and a lower base plate is arranged between the lower die base and the lower die plate; the problem of single-process production in the prior art can be solved, and the stamping structure is reasonable in design, stable in product quality, low in labor cost, high in production efficiency and high in applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of water pump production and manufacturing, and specifically relates to a progressive die for stamping the blades of a vertical multi-stage pump. Background Art

[0002] The impeller blade is a key part of a vertical multi-stage pump. The forming angle of the blade is related to the performance of the water pump. A vertical multi-stage pump consists of multiple stages of impellers. One stage of impeller requires six blades, and the batch production of the blades is large. In the prior art, the stamping of the blades is a single-process production, which is completed through three processes: shearing, blanking, and forming. Generally, it requires three people and three sets of equipment; single-person and single-machine production has low production efficiency; manual placement and taking of workpieces pose safety hazards; the forming die uses rubber soft materials, resulting in low die life and unstable forming angles. Summary of the Invention

[0003] The purpose of the present invention is to solve the above deficiencies and provide a progressive die for stamping the blades of a vertical multi-stage pump, which can solve the problems of single-process production in the prior art, and has reasonable stamping process design, stable product quality, low labor cost, high production efficiency, and strong applicability.

[0004] To achieve the above purpose, a progressive die for stamping the blades of a vertical multi-stage pump is designed, which includes an upper die and a lower die of the die. The upper die of the die includes a stripper plate 1, a stripper plate guide sleeve 3, an inner guide post 5, a waste punch 6, a rectangular spring 8, a round hole punch 9, an upper die base 11, an upper backing plate 12, a fixing plate 13, a height-limiting plate 14, and a pilot pin 15. The upper backing plate 12 and the fixing plate 13 are fixed to the upper die base 11 by inner hexagon socket head cap screws 4. The inner guide post 5, the waste punch 6, and the round hole punch 9 are installed in the fixing plate 13 and are respectively in clearance fit with the stripper plate 1. The stripper plate guide sleeve 3 and the pilot pin 15 are installed in the stripper plate 1. The stripper plate 1 and the height-limiting plate 14 are connected as a whole by inner hexagon socket head cap screws 1 and are hung on the upper end face of the upper backing plate 12 by stripper screws 10. A rectangular spring 8 is installed between the upper die base 11 and the height-limiting plate 14. The lower die of the die includes a round hole insert 16, a bottom plate 21, a pad foot 22, a lower die base 23, a lower backing plate 24, a die guide sleeve 25, and a lower template 26. The round hole insert 16 and the die guide sleeve 25 are inserted and installed in the lower template 26. The lower template 26 is fixed to the lower die base 23 by inner hexagon socket head cap screws 5. The lower die base 23, the pad foot 22, and the bottom plate 21 are fixed as a whole by inner hexagon socket head cap screws 4. A lower backing plate 24 is provided between the lower die base 23 and the lower template 26.

[0005] Furthermore, the upper die of the die is installed on the slider of the punching press and makes reciprocating up and down movements driven by the slider of the punching press. The lower die of the die is installed on the lower working table of the punching press.

[0006] Further, it further includes a lifting and guiding device, which includes a lifting and guiding pin 17, a round wire spring 19, and a set screw 20. The lifting and guiding pin 17 is arranged above the round wire spring 19 and the set screw 20, and is coaxially arranged with the round wire spring 19 and the set screw 20. The lifting and guiding device is installed in the cavity of the lower template 26 with a clearance fit.

[0007] Further, the pilot pins 15 are fixed in the stripper plate 1 and are evenly distributed on both sides at positions opposite to the material tape pilot holes. The pilot pins 15 protrude from the stripper plate 1 and the net length is 0.6 times the thickness of the product material tape. The diameter of the pilot pins 15 is 0.05 mm smaller than that of the round hole punch 9. The front end of the pilot pins 15 is designed with a guiding arc. When the upper die of the mold works and moves downward, the pilot pins 15 are first inserted into the pilot holes to control the feeding error of the material tape and ensure the accuracy of the feeding pitch, thereby ensuring the stamping forming accuracy of the product.

[0008] Further, a plurality of lifting and guiding devices are provided. The plurality of lifting and guiding devices are evenly distributed on both sides of the material tape and move up and down reciprocally together with the upper die of the mold.

[0009] Further, a groove is provided at the upper end of the lifting and guiding pin 17. The material tape moves from left to right in the grooves of the lifting and guiding pins 17 on both sides, so that it can move from left to right according to the set pitch.

[0010] Further, it further includes a forming female die 33 and a forming male die 35. The forming female die 33 is installed in the fixing plate 13 and is fixed on the upper plane of the upper backing plate 12 by the inner hexagon socket head screw III 7. The forming male die 35 is installed in the lower template 26 and is fixed on the lower backing plate 24 by the inner hexagon socket head screw VI 36. The forming female die 33 and the forming male die 35 are designed according to the blade profile and quenched, so that the mold has good rigidity and the blade forming is stable.

[0011] Further, a blowing pin 34 is provided at the center of the forming male die 35. The blowing pin 34 is connected to a compressed air pipe. When the upper die of the mold moves up to the highest point, the blowing pin 34 blows out the formed product through compressed air, so that the production of the material is smoother.

[0012] Furthermore, it also includes a misfeeding detection device, which includes a detection pin 28, a round wire spring 29, a set screw 30, a cylindrical pin 31 and a micro switch 32. The detection pin 28, the round wire spring 29 and the set screw 30 are coaxially arranged, and the detection pin 28 is installed with clearance fit with the fixed plate 13, the stop plate 14 and the unloading plate 1. The detection pin 28 is 3 to 5 mm higher than the lower plane of the unloading plate 1. An arc groove is designed at the shoulder of the detection pin 28. The cylindrical pin 31 is installed in the "U"-shaped groove of the fixed plate 13 with a horizontal clearance. The spherical end of the cylindrical pin 31 contacts the groove of the detection pin 28, and the other end of the cylindrical pin 31 contacts the contact of the micro switch 32. The micro switch 32 is installed on the lower plane of the upper die seat 11 and is connected to the start and stop signal of the punch press, so that the punch press can automatically stop when the feeding is abnormal, thereby improving the life of the mold and enabling unattended operation.

[0013] Furthermore, it also includes a ball guide pin assembly 37, which is arranged between the upper die base 11 and the lower die base 23. The bottom of the ball guide pin assembly 37 is fixedly connected to the lower die base 23, and the top of the ball guide pin assembly 37 is rollingly connected to the upper die base 11, thereby further improving the feeding accuracy and stability, making the product quality more stable.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) The present invention adopts an improved upper die and a lower die, and its stamping structure is reasonably designed, the product quality is stable, the labor cost is low, the production efficiency is high, and the applicability is strong;

[0016] (2) The present invention concentrates multiple blade stamping processes on a set of molds, and the mold is designed with stations such as punching and guiding pin holes, blanks, punching waste, blanks, cutting both ends, blanks, and blade forming, thereby solving the problem of single-process production in the prior art;

[0017] (3) The present invention can be equipped with a feeder to realize automatic continuous stamping production, with high production efficiency, and is designed with a feed guide device, with high feeding step accuracy, without the need for hands to enter the mold, and without safety hazards;

[0018] (4) The blade forming convex and concave dies of the present invention are designed with mold steel and quenched, so that the mold has good rigidity and the blade forming is stable. In addition, the blade discharging device is designed to ensure smooth production and discharging.

[0019] (5) The present invention is designed with a mis-feeding detection device, and the punch press automatically stops when feeding is abnormal, thereby increasing the life of the mold and enabling unattended operation, which is worthy of popularization and application. [Drawings]

[0020] Figure 1 This is a blade progressive die material strip diagram of the present invention;

[0021] Figure 2 is the front view structural schematic diagram of the present invention;

[0022] Figure 3 is the plan view of the lower die of the blade progressive die of the present invention;

[0023] Figure 4 is the right view structural schematic diagram of the present invention;

[0024] In the figure: 1. Stripper plate; 2. Socket head cap screw one; 3. Stripper plate guide bushing; 4. Socket head cap screw two; 5. Inner guide pillar; 6. Scrap punch; 7. Socket head cap screw three; 8. Rectangular spring; 9. Round hole punch; 10. Stripping screw; 11. Upper die holder; 12. Upper backing plate; 13. Fixed plate; 14. Stop height plate; 15. Pilot pin; 16. Round hole insert block; 17. Lift guide pin; 18. Socket head cap screw four; 19. Round wire spring; 20. Set screw; 21. Bottom plate; 22. Pad foot; 23. Lower die holder; 24. Lower backing plate; 25. Die guide bushing; 26. Lower template; 27. Socket head cap screw five; 28. Detection pin; 29. Round wire spring; 30. Set screw; 31. Cylindrical pin; 32. Microswitch; 33. Forming die; 34. Blowing pin; 35. Forming punch; 36. Socket head cap screw six; 37. Ball guide pillar assembly; 38. Air pipe joint. [Detailed implementation manner]

[0025] As shown in Appendix Figure 1 to Appendix Figure 4As shown in the figure, the present invention provides a vertical multi-stage pump blade stamping progressive die, which includes an upper die and a lower die. The upper die includes a stripper plate 1, a stripper guide bushing 3, an inner guide pillar 5, a waste punch 6, a rectangular spring 8, a round hole punch 9, an upper die base 11, an upper backing plate 12, a fixing plate 13, a height-limiting plate 14 and a pilot pin 15. The upper backing plate 12 and the fixing plate 13 are fixed to the upper die base 11 by hexagon socket head cap screws II 4. The inner guide pillar 5, the waste punch 6 and the round hole punch 9 are installed in the fixing plate 13 and are respectively in clearance fit with the stripper plate 1. The stripper guide bushing 3 and the pilot pin 15 are installed in the stripper plate 1. The stripper plate 1 and the height-limiting plate 14 are connected as a whole by hexagon socket head cap screws I 2 and are hung on the upper end surface of the upper backing plate 12 by stripper screws 10. A rectangular spring 8 is installed between the upper die base 11 and the height-limiting plate 14. The lower die includes a round hole insert 16, a bottom plate 21, a pad foot 22, a lower die base 23, a lower backing plate 24, a die guide bushing 25 and a lower template 26. The round hole insert 16 and the die guide bushing 25 are inserted and fixed in the lower template 26. The lower template 26 is fixed to the lower die base 23 by hexagon socket head cap screws V 27. The lower die base 23, the pad foot 22 and the bottom plate 21 are fixed as a whole by hexagon socket head cap screws IV 18. A lower backing plate 24 is provided between the lower die base 23 and the lower template 26. The upper die is installed on the punch slide block and makes a reciprocating up and down movement driven by the punch slide block. The lower die is installed on the lower working table of the punch.

[0026] It further includes a forming die cavity 33 and a forming punch 35. The forming die cavity 33 is installed in the fixing plate 13 and is fixed on the upper plane of the upper backing plate 12 by hexagon socket head cap screws III 7. The forming punch 35 is installed in the lower template 26 and is fixed on the lower backing plate 24 by hexagon socket head cap screws VI 36. The forming die cavity 33 and the forming punch 35 are designed according to the blade profile and quenched, so that the die has good rigidity and the blade forming is stable. A blowing pin 34 is arranged at the center of the forming punch 35. The blowing pin 34 is connected to a compressed air pipe. When the upper die moves up to the highest point, the blowing pin 34 blows out the formed product through compressed air, so that the production discharge is smoother.

[0027] It further includes a floating material guiding device. The floating material guiding device includes a floating material guiding pin 17, a round wire spring 19 and a set screw 20. The floating material guiding pin 17 is arranged above the round wire spring 19 and the set screw 20 and is coaxially arranged with the round wire spring 19 and the set screw 20. The floating material guiding device is installed in the die cavity of the lower template 26 in clearance fit. There are multiple such floating material guiding devices, which are evenly distributed on both sides of the strip and make a reciprocating up and down movement together with the upper die. A groove is opened at the upper end of the floating material guiding pin 17 of the floating material guiding device. The strip moves from left to right in the grooves of the floating material guiding pins 17 on both sides, so that it can move from left to right according to the set pitch.

[0028] It also includes a misfeeding detection device, which includes a detection pin 28, a round wire spring 29, a set screw 30, a cylindrical pin 31 and a micro switch 32. The detection pin 28, the round wire spring 29 and the set screw 30 are coaxially arranged, and the detection pin 28 is installed with clearance fit with the fixed plate 13, the stop plate 14 and the unloading plate 1. The detection pin 28 is 3 to 5 mm higher than the lower plane of the unloading plate 1. An arc groove is designed at the shoulder of the detection pin 28. The cylindrical pin 31 is installed in the "U"-shaped groove of the fixed plate 13 with a horizontal clearance. The spherical end of the cylindrical pin 31 contacts the groove of the detection pin 28, and the other end of the cylindrical pin 31 contacts the contact of the micro switch 32. The micro switch 32 is installed on the lower plane of the upper die seat 11 and is connected to the start and stop signal of the punch press, so that the punch press can automatically stop when feeding is abnormal, thereby improving the life of the mold and enabling unattended operation.

[0029] It also includes a ball guide pin assembly 37, which is arranged between the upper die base 11 and the lower die base 23. The bottom of the ball guide pin assembly 37 is fixedly connected to the lower die base 23, and the top of the ball guide pin assembly 37 is rollingly connected to the upper die base 11, thereby further improving the feeding accuracy and stability, making the product quality more stable.

[0030] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0031] As attached Figure 1 As shown, the blade progressive die strip diagram of the present invention includes: punching guide holes, punching waste holes, empty steps, punching waste holes, cutting both ends, empty steps, forming and other workstations.

[0032] As attached Figure 2As shown in the figure, the present invention includes a stripper plate 1, a hexagon socket head screw one 2, a stripper plate guide sleeve 3, a hexagon socket head screw two 4, an inner guide post 5, a waste punch 6, a hexagon socket head screw three 7, a rectangular spring 8, a round hole punch 9, a stripper screw 10, an upper die holder 11, an upper backing plate 12, a fixing plate 13, a height stop plate 14, a pilot pin 15, a round hole insert block 16, a lifter guide pin 17, a hexagon socket head screw four 18, a round wire spring 19, a set screw 20, a bottom plate 21, a spacer block 22, a lower die holder 23, a lower backing plate 24, a die guide sleeve 25, a lower template 26, and a hexagon socket head screw five 27. Among them, the stripper plate 1, the hexagon socket head screw one 2, the stripper plate guide sleeve 3, the hexagon socket head screw two 4, the inner guide post 5, the waste punch 6, the hexagon socket head screw three 7, the rectangular spring 8, the round hole punch 9, the stripper screw 10, the upper die holder 11, the upper backing plate 12, the fixing plate 13, the height stop plate 14, the pilot pin 15, etc. form the upper die of the mold. The upper die of the mold is installed on the punch slider and makes reciprocating up and down movements during work; the upper backing plate 12 and the fixing plate 13 are fixed on the upper die holder by the hexagon socket head screw two 4. The inner guide post 5, the waste punch 6, and the round hole punch 9 are installed in the fixing plate 13 and are in small clearance fit with the stripper plate 1; the stripper plate guide sleeve 3 and the pilot pin 15 are installed in the stripper plate 1. The stripper plate 1 and the height stop plate 14 are connected together by the hexagon socket head screw one 2 and are hung on the upper end face of the upper backing plate through the stripper screw 10.

[0033] The round hole insert block 16, the lifter guide pin 17, the hexagon socket head screw four 18, the round wire spring 19, the set screw 20, the bottom plate 21, the spacer block 22, the lower die holder 23, the lower backing plate 24, the die guide sleeve 25, the lower template 26, the hexagon socket head screw five 27, etc. form the lower die of the mold. The lower die is installed on the lower working table of the punch. The round hole insert block 16 and the die guide sleeve 25 are installed in the lower template 26. The lower template 26 is fixed on the lower die holder 23 by the hexagon socket head screw five 27. The lower die holder 23, the spacer block 22, and the bottom plate 21 are fixed together by hexagon socket head screws. The lifter guide pin 17, the round wire spring 18, and the set screw 19 form 10 sets of lifter guide devices, which are installed in the cavity of the lower template 26 with clearance fit, are evenly distributed on both sides of the strip, and make reciprocating up and down movements together with the upper die; a groove of φ5*2.0 is opened at the upper end of the lifter guide pin 17. Figure 1 As shown, the strip moves from left to right in the grooves of the lifter guide pins 17 on both sides at a set pitch.

[0034] The pilot pin 15 is fixed in the stripper plate 1. There are 10 pieces in total, which are evenly distributed on both sides at the positions opposite to the pilot holes of the strip. The diameter of the pilot pin 15 extends out of the stripper plate 1 with a net length of 0.6 times the thickness of the product strip; the diameter of the pilot pin 15 is 0.05 mm smaller than that of the round hole punch 9, and a guiding arc is designed at the front end; when the upper die works and moves downward, the pilot pin 15 first enters the pilot hole to control the feeding error of the strip and ensure the accuracy of the feeding pitch, thereby ensuring the stamping forming accuracy of the product.

[0035] As attached Figure 4As shown, the forming female die 33 is installed in the fixing plate 13 and fixed on the upper plane of the upper backing plate 12 by the socket head cap screws three 7. The forming male die is installed in the lower template 26 and fixed on the upper surface of the lower backing plate 24 by the socket head cap screws six 36. The forming female die 33 and the forming male die 35 are designed according to the blade profile and quenched. The detection pin 28, round wire spring 29, set screw 30, cylindrical pin 31, and microswitch 32 together form a misfeeding detection device. The detection pin 28 is installed with a clearance fit in the fixing plate 13, stop height plate 14, and stripper plate 1. The detection pin 28 projects 3 - 5 mm above the lower plane of the stripper plate 1. An arc-shaped groove is designed at the shoulder of the detection pin 28. The cylindrical pin 31 is installed horizontally with a clearance in the "U"-shaped groove of the fixing plate 13. The spherical end of the cylindrical pin 31 contacts the groove of the detection pin 28, and the other end contacts the contact of the microswitch 32. The microswitch 32 is installed on the lower plane of the upper die holder and connected to the start / stop signal of the punch press operation. When the die works, the detection pin 28 is first inserted into Figure 1 the pilot hole of the strip shown; if Figure 1 the feeding pitch of the strip is incorrect, the detection pin 28 is blocked and retracts upward, pushing the cylindrical pin 31 to move horizontally towards the microswitch 32, causing the microswitch 32 to trigger a stop command, and the punch press stops and alarms, avoiding damage to the product and the die.

[0036] The working process of the present invention is as follows: Figure 1 The strip shown advances one pitch from left to right along the groove of the lower die floating guide pin 17 shown. Then the upper die starts to move downward. Figure 2 The pilot pin 15 in the stripper plate 1 shown first inserts into Figure 2 the pilot hole of the strip shown. Under the action of the rectangular spring 8, the stripper plate 1 presses on Figure 1 the strip shown; the upper die continues to move downward. Figure 1 The round hole punch 9, waste punch 6 and Figure 2 the forming female die 33 shown complete the blanking and forming stamping processes; finally, the upper die moves upward. Figure 4 The round hole punch 9, waste punch 6 and Figure 2 the forming female die 33 shown first separate from Figure 4 the strip; the upper die continues to move upward. Figure 1 The stripper plate 1 separates from Figure 2 the strip shown; the upper die moves upward to the highest point, and compressed air is connected through the RP1 / 4 air pipe joint 38 shown, passes through the groove of the lower die holder to Figure 1 the air blowing pin 34 shown, and blows out Figure 3 the product blade shown; then Figure 4 the strip shown advances by the set pitch under the action of the feeder, and the next stamping cycle is carried out. Figure 1 the product blade shown; subsequently Figure 1 the strip shown advances by the set pitch under the action of the feeder, and the next stamping cycle is carried out.

[0037] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Standard parts used can be purchased from the market. Special-shaped parts can be customized according to the descriptions and illustrations in the specification. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. Machinery, parts, and equipment all adopt conventional models in the prior art. Circuit connections adopt conventional connection methods in the prior art, and will not be elaborated here.

[0038] The present invention is not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A progressive die for stamping the blades of a vertical multi-stage pump, characterized in that: It includes an upper die and a lower die of a mold. The upper die of the mold includes a stripper plate (1), stripper plate guide bush (3), inner guide pillar (5), waste punch (6), rectangular spring (8), round hole punch (9), upper die base (11), upper backing plate (12), fixing plate (13), height stop plate (14) and pilot pin (15). The upper backing plate (12) and the fixing plate (13) are fixed to the upper die base (11) by socket head cap screws II (4). The inner guide pillar (5), waste punch (6), and round hole punch (9) are installed inside the fixing plate (13) and are in clearance fit with the stripper plate (1) respectively. The stripper plate guide bush (3) and the pilot pin (15) are installed inside the stripper plate (1). The stripper plate (1) and the height stop plate (14) are connected as a whole by socket head cap screws I (2) and are hung on the upper end face of the upper backing plate (12) by stripper screws (10). A rectangular spring (8) is installed between the upper die base (11) and the height stop plate (14). The lower die of the mold includes a round hole insert block (16), bottom plate (21), pad feet (22), lower die base (23), lower backing plate (24), die guide bush (25) and lower template (26). The round hole insert block (16) and the die guide bush (25) are inserted and installed inside the lower template (26). The lower template (26) is fixed to the lower die base (23) by socket head cap screws V (27). The lower die base (23), pad feet (22) and the bottom plate (21) are fixed as a whole by socket head cap screws IV (18). A lower backing plate (24) is provided between the lower die base (23) and the lower template (26).

2. The progressive die for stamping the impeller of the vertical multi-stage pump according to claim 1, wherein: The upper die of the mold is installed on the punch slider and makes reciprocating up and down movements driven by the punch slider. The lower die of the mold is installed on the lower working table of the punch.

3. The progressive die for stamping the impeller of the vertical multi-stage pump according to claim 1, characterized in that: It further includes a lifting and guiding device. The lifting and guiding device includes a lifting and guiding pin (17), round wire spring (19) and set screw (20). The lifting and guiding pin (17) is located above the round wire spring (19) and the set screw (20) and is arranged coaxially with the round wire spring (19) and the set screw (20). The lifting and guiding device is installed in the mold cavity of the lower template (26) with a clearance fit.

4. The progressive die for stamping the impeller of the vertical multistage pump according to claim 1, wherein: The pilot pins (15) are fixed inside the stripper plate (1) and are evenly distributed on both sides at positions opposite to the guide holes of the strip. The pilot pins (15) protrude from the stripper plate (1) and the net length is 0.6 times the thickness of the product strip. The diameter of the pilot pins (15) is 0.05 mm smaller than that of the round hole punch (9). The front end of the pilot pins (15) is designed with a guiding arc. When the upper die of the mold works and moves downward, the pilot pins (15) are first inserted into the guide holes, thereby controlling the feeding error of the strip to ensure the accuracy of the feeding pitch.

5. The progressive die for stamping the impeller of the vertical multi-stage pump according to claim 3, characterized in that: A plurality of the lifting and guiding devices are provided. The plurality of lifting and guiding devices are evenly distributed on both sides of the strip and make reciprocating up and down movements together with the upper die of the mold.

6. The progressive die for stamping the impeller of the vertical multistage pump according to claim 3, wherein: The upper end of the lifting and guiding pin (17) is provided with a groove. The strip moves from left to right in the grooves of the lifting and guiding pins (17) on both sides.

7. The progressive die for stamping the impeller of the vertical multi-stage pump according to claim 1, characterized in that: It further includes a forming female die (33) and a forming male die (35). The forming female die (33) is installed in the fixed plate (13) and fixed on the upper plane of the upper backing plate (12) by the third hexagon socket head cap screw (7). The forming male die (35) is installed in the lower template (26) and fixed on the lower backing plate (24) by the sixth hexagon socket head cap screw (36). The forming female die (33) and the forming male die (35) are designed according to the blade profile and quenched.

8. The progressive die for stamping the impeller of the vertical multi-stage pump according to claim 7, characterized in that: A blowing pin (34) is arranged at the center of the forming male die (35). The blowing pin (34) is connected to a compressed air pipe. When the upper die of the mold moves up to the highest point, the forming product is blown out by compressed air through the blowing pin (34).

9. The progressive die for stamping the impeller of the vertical multi-stage pump according to claim 1, wherein: It further includes a misfeeding detection device. The misfeeding detection device includes a detection pin (28), a round wire spring (29), a set screw (30), a cylindrical pin (31) and a microswitch (32). The detection pin (28), the round wire spring (29) and the set screw (30) are arranged coaxially. The detection pin (28) is installed with clearance fit with the fixed plate (13), the height limiting plate (14) and the stripper plate (1). The detection pin (28) is 3 - 5 mm higher than the lower plane of the stripper plate (1). An arc-shaped groove is designed at the shoulder of the detection pin (28). The cylindrical pin (31) is horizontally installed with clearance in the "U"-shaped groove of the fixed plate (13). The spherical end of the cylindrical pin (31) contacts the groove of the detection pin (28). The other end of the cylindrical pin (31) contacts the contact point of the microswitch (32). The microswitch (32) is installed on the lower plane of the upper die base (11) and connected to the start-stop signal of the punch press operation.

10. The progressive die for stamping the impeller of the vertical multi-stage pump according to claim 1, characterized in that: It further includes a ball guide pillar assembly (37). The ball guide pillar assembly (37) is arranged between the upper die base (11) and the lower die base (23). The bottom of the ball guide pillar assembly (37) is fixedly connected in the lower die base (23). The top of the ball guide pillar assembly (37) is in rolling connection with the upper die base (11).

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