Water pump blade twisting die

Abstract

The utility model belongs to the field of metal forming machining, and particularly relates to a water pump blade twisting die which comprises an upper die base and a lower die base and further comprises a male die, a female die, a limiting assembly and a guiding device, the male die is arranged below the upper die base, and the lower portion of the male die is provided with an upper die arc part; the female die is arranged above the lower die base, and the upper portion of the female die is provided with a lower die arc part matched with the upper die arc part. The limiting assembly comprises a push rod and an ejector rod, the ejector rod is arranged in the female die, and limiting protrusions are arranged at the four corners of the upper end of the ejector rod. The push rod is arranged in the male die; a plurality of limiting blocks are arranged at the lower end of the push rod; the guiding devices are symmetrically arranged on the two opposite sides of the male die fixing device and the female die fixing device. A stamped semi-finished blade is twisted into a required shape through the male die and the female die, air pollution cannot be generated in the manufacturing process, the blade is twisted and formed through the die, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of metal forming and processing, and in particular relates to a water pump blade twisting and bending die. Background Art

[0002] At present, impeller blades are usually directly cast from gray iron. The casting process not only generates air pollution, but also the products manufactured in this way require further machining before they can be used as finished workpieces, which reduces production efficiency and increases production costs. At the same time, the blades cast from gray iron are heavier. When such blades are used in harsh environments, the gray iron is not corrosion-resistant and the blades are easily damaged, which in turn increases maintenance costs. Utility Model Content

[0003] In view of the above problems, the present application provides a water pump blade twisting die, which can directly twist the stamped semi-finished blade into a required shape.

[0004] The technical solution of the utility model is: a water pump blade twisting die, including an upper die base and a lower die base, and also includes:

[0005] The punch is arranged below the upper die seat, and has an upper die arc portion which is arranged obliquely at the lower part;

[0006] The concave die is arranged above the lower die seat, and has a lower die arc portion on its upper part, and the lower die arc portion is adapted to the upper die arc portion, and the upper die arc portion and the lower die arc portion together form a twisting portion, and the twisting portion includes a bending surface and a twisting surface, and the bending surface and the twisting surface arc are transitionally connected;

[0007] The limiting assembly comprises a push rod and a push rod, wherein the push rod is arranged inside the concave mold, and limiting protrusions are arranged at four corners of the upper end of the push rod; the push rod is arranged inside the punch mold, and a plurality of limiting blocks are arranged at the lower end of the push rod, and the plurality of limiting blocks are respectively clamped between two adjacent limiting protrusions;

[0008] A punch fixing plate, the punch fixing plate being connected to the punch;

[0009] A concave die fixing plate, wherein the concave die fixing plate is connected to the concave die;

[0010] The guide device is provided with two groups, and the two groups of the guide devices are symmetrically arranged on the opposite sides of the male mold fixing device and the female mold fixing device.

[0011] Furthermore, a mold handle is provided on the upper surface of the upper mold base, and a pad is connected to the lower surface of the upper mold base. A push rod groove is opened on the pad, and a push spring is provided in the push rod groove, and one end of the push spring is connected to the end of the push rod.

[0012] Furthermore, a push rod groove is opened on the lower mold base, and an ejector compression spring is arranged in the push rod groove. One end of the ejector compression spring is connected to the end of the push rod. When the ejector compression spring is in the original state, the upper end of the push rod is flush with the topmost end of the arc portion of the lower mold.

[0013] Furthermore, the punch fixing plate is arranged below the backing plate, and the punch fixing plate is sleeved on the outside of the punch, so that the horizontal movement of the punch is limited by the punch fixing plate.

[0014] Furthermore, the die fixing plate is arranged on the upper surface of the lower die base, and the die fixing plate is sleeved on the outside of the die, and the horizontal movement of the die is limited by the die fixing plate.

[0015] Furthermore, each group of the guide devices includes a guide column and a guide sleeve, wherein the guide column is arranged on one side of the die fixing plate, and the guide column is connected to the upper surface of the lower die base; the guide sleeve is arranged on the outside of the guide column, and one end of the guide sleeve is connected to the lower surface of the upper die base.

[0016] Furthermore, the blade twisting and bending die also includes a positioning assembly, which includes an upper die positioning hole and a lower die positioning hole. The upper die positioning hole is arranged through the upper die seat, the pad and one side of the punch fixing plate, and an upper die cylindrical pin is arranged in the upper die positioning hole; the lower die positioning hole is arranged through the one side of the die fixing plate and the lower die seat, and a lower die cylindrical pin is arranged in the lower die positioning hole. The positions of the upper die positioning hole and the lower die positioning hole correspond to each other.

[0017] The beneficial effects of the utility model are as follows: by placing the semi-finished blade between the punch and the die, and limiting the blade by the limiting protrusion, the blade is prevented from rotating during the twisting process; by pressing down the upper die seat, the punch is driven to move downward, and the arc portion of the upper die and the arc portion of the lower die work together to directly twist the blade into a required shape; by moving the upper die seat upward, the punch is driven to move upward, and the ejector rod is pushed upward by the elastic force of the ejector spring, and the push rod is pushed downward by the elastic force of the push spring, so that the processed blade is conveniently taken out from between the punch and the die; the blades twisted and formed by 1Cr18Ni9Ti stainless steel will not generate air pollution during the manufacturing process, and at the same time, the weight of the blades is reduced, and their corrosion resistance is improved, thereby reducing the maintenance cost of the blades. At the same time, the blades are directly twisted and formed by the mold, and there is no need to machine the blades, thereby improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic cutaway diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the punch of the utility model;

[0021] Figure 3 It is a schematic diagram of the concave mold of the utility model;

[0022] Figure 4 It is a cross-sectional schematic diagram of the punch fixing plate of the utility model;

[0023] Figure 5 It is a cross-sectional schematic diagram of the concave die fixing plate of the utility model;

[0024] Figure 6 It is a schematic diagram of the push rod and the push rod of the utility model;

[0025] Figure 7 The semi-finished blade after stamping used in the utility model;

[0026] Figure 8 This is a schematic diagram of the blade structure after twisting of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present utility model, it should be noted that the terms "upper", "lower", "one side", "one end", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model; in addition, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Since currently gray iron is usually directly cast into blades, blades cannot be produced in large quantities, noise pollution will be generated in the casting process, and such gray iron blades are heavy. At the same time, gray iron is not corrosion-resistant and the blades are easily damaged, which leads to increased maintenance costs. In view of this, the inventors of the present application provide a water pump blade twisting die that can directly twist the stamped blades into a required shape.

[0030] like Figure 1-8 As shown, a water pump blade twisting and bending die includes an upper die base 1 and a lower die base 2, and also includes: a punch 101, a die 201, a limiting component 4, a punch fixing plate 103, a die fixing plate 203, a guide device 5 and a positioning component 6.

[0031] Among them, Figure 1 As shown, the punch 101 is arranged below the upper die base 1, and its lower part has an upper die arc portion 102 which is inclined; the die 201 is arranged above the lower die base 2, and its upper part has a lower die arc portion 202, and the lower die arc portion 202 is adapted to the upper die arc portion 102, and the upper die arc portion 102 and the lower die arc portion 202 together form a twisting portion 3, and the twisting portion 3 includes a bending surface 301 and a twisting surface 302, and the bending surface 301 and the twisting surface 302 are connected by an arc transition.

[0032] Based on the above embodiment, the semi-finished blade 7 produced by stamping is placed between the punch 101 and the die 201, and the blade 7 is twisted into a desired shape by the twisting portion 3 composed of the upper die arc portion 102 and the lower die arc portion 201; the blade 7 twisted using the blade twisting die is 1Cr18Ni9Ti stainless steel.

[0033] In this embodiment, if Figure 1 , Figure 6As shown, the limiting assembly 4 includes a push rod 401 and a push rod 402. The push rod 402 is arranged inside the die 201, and limiting protrusions 403 are arranged at the four corners of the upper end of the push rod 402; the push rod 401 is arranged inside the punch 101, and a plurality of limiting blocks 404 are arranged at the lower end of the push rod 401, and the plurality of limiting blocks 404 are respectively clamped between two adjacent limiting protrusions 403.

[0034] Based on the above embodiment, the blade 7 is clamped between the four limiting protrusions 403, and the limiting protrusions 403 and the limiting blocks 404 prevent the blade 7 from rotating during the twisting process.

[0035] Among them, Figure 1 As shown, a mold handle 107 is provided on the upper surface of the upper mold base 1, and a pad 104 is connected to the lower surface of the upper mold base 1. A push rod groove 405 is provided on the pad 104, and a push spring 406 is provided in the push rod groove 405, and one end of the push spring 406 is connected to the end of the push rod 401; a push rod groove 407 is provided on the lower mold base 2, and an ejection compression spring 408 is provided in the ejector groove 407, and one end of the ejection compression spring 408 is connected to the end of the ejector 402.

[0036] Based on the above embodiment, when the ejection compression spring 408 is in the original state, the end of the ejector rod 402 is flush with the topmost end of the lower mold arc portion 202; when the blade 7 is twisted into the required shape by the punch 101 and the die 201, the ejector rod 402 is pushed by the elastic force of the ejection compression spring 408 to eject the blade 7 from the lower mold arc portion 202, and at the same time, the push rod 401 is pushed by the elastic force of the push spring 406 to prevent the blade 7 from being stuck in the upper mold arc portion 102.

[0037] In this embodiment, if Figure 1-5 As shown, the punch fixing plate 103 is connected to the punch 101; the punch fixing plate 103 is arranged below the backing plate 104, and the punch fixing plate 103 is sleeved on the outside of the punch 101, and the horizontal movement of the punch 101 is limited by the punch fixing plate 103;

[0038] The die fixing plate 203 is connected to the die 201 ; the die fixing plate 203 is disposed on the upper surface of the lower die base 2 , and the die fixing plate 203 is sleeved on the outside of the die 201 , and the horizontal movement of the die 201 is limited by the die fixing plate 203 .

[0039] Based on the above embodiment, the horizontal movement of the punch 101 is limited by the punch fixing plate 103, and the punch 101 is limited to the lower surface of the pad 104 by the upper die protrusion 105 and the upper die groove 106; the horizontal movement of the die 201 is limited by the die fixing plate 203, and the die 201 is limited to the upper surface of the lower die base 2 by the lower die protrusion 204 and the lower die groove 205.

[0040] In this embodiment, if Figure 1 As shown, there are two sets of guide devices 5, and the two sets of guide devices 5 are symmetrically arranged on opposite sides of the male mold fixing device 103 and the female mold fixing device 203;

[0041] Each set of guide devices 5 includes a guide column 501 and a guide sleeve 502. The guide column 501 is arranged on one side of the die fixing plate 203, and the guide column 501 is connected to the upper surface of the lower die base 2; the guide sleeve 502 is arranged outside the guide column 501, and one end of the guide sleeve 502 is connected to the lower surface of the upper die base 1.

[0042] Based on the above embodiment, the guide post 501 and the guide sleeve 502 play a guiding role in the downward movement of the punch 101.

[0043] In this embodiment, the positioning assembly 6 includes an upper mold positioning hole 601 and a lower mold positioning hole 602. The upper mold positioning hole 601 is arranged through the upper mold base 1, the pad 104 and one side of the punch fixing plate 103, and an upper mold cylindrical pin 603 is arranged in the upper mold positioning hole 601; the lower mold positioning hole 602 is arranged through the one side of the die fixing plate 203 and the lower mold base 2, and a lower mold cylindrical pin 604 is arranged in the lower mold positioning hole 602. The positions of the upper mold positioning hole 601 and the lower mold positioning hole 602 correspond to each other.

[0044] Based on the above embodiment, positioning is performed through the upper die positioning hole 601 and the lower die positioning hole 602 to ensure that the punch 101 and the die 201 are aligned during installation, thereby ensuring the dimensional accuracy of the blade 7 after twisting.

[0045] The working principle of the utility model is as follows: first, a semi-finished blade 7 is punched out of a 1Cr18Ni9Ti stainless steel plate, and the upper die holder 1 is moved upward to drive the punch fixing plate 103 and the punch 101 to move upward. During this process, the ejector pin 402 moves upward under the elastic force of the ejector spring 408 until the top of the ejector pin 402 is flush with the top of the arc portion 202 of the lower die, and the punch 101 is moved upward continuously to completely separate the push rod 401 from the ejector pin 402; the semi-finished blade 7 is horizontally clamped on the top of the ejector pin 402, and the blade 7 is limited by the limiting protrusion 403; the upper die holder 1 is pressed downward by the die handle 107, and the upper die holder 1 drives the pad 104 below it to move downward, thereby bringing The movable punch 101 moves downward, at which time the limit block 404 moves downward and cooperates with the limit protrusion 403 to prevent the blade 7 from rotating. The punch 101 continues to move downward, and the push rod 401 and the ejector rod 402 are respectively pressed by the force of the push spring 406 and the ejector spring 408 at their respective ends. The ejector rod 401 and the push rod 402 drive the blade 7 to move downward until the push rod 402 is completely pressed into the inside of the die 202. In this process, the blade 7 is bent under the action of the twisting portion 3, and then twisted under the action of the twisting surface 302; finally, the blade 7 is twisted into a desired shape through the joint action of the upper die arc portion 102 below the punch 101 and the lower die arc portion 202 above the die 201;

[0046] The upper die base 1 is lifted by the die handle 107, and the upper die base 1 drives the pad 104 to move upward, and the pad 104 drives the punch fixing plate 103 and the punch 101 below it to move upward, and the ejector pin 402 is pushed upward by the elastic force of the ejector compression spring 408 to eject the blade 7 from the arc portion 202 of the lower die. At the same time, the push rod 401 is pushed downward by the elastic force of the push spring 406 to prevent the blade 7 from being stuck in the arc portion 102 of the upper die. At this time, the formed blade 7 can be taken out from between the punch 101 and the die 201.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water pump blade twisting die, comprising an upper die base and a lower die base, characterized in that: Also includes: The punch is arranged below the upper die seat, and has an upper die arc portion which is arranged obliquely at the lower part; The concave die is arranged above the lower die seat, and has a lower die arc portion on its upper part, and the lower die arc portion is adapted to the upper die arc portion, and the upper die arc portion and the lower die arc portion together form a twisting portion, and the twisting portion includes a bending surface and a twisting surface, and the bending surface and the twisting surface arc are transitionally connected; The limiting assembly comprises a push rod and a push rod, wherein the push rod is arranged inside the concave mold, and limiting protrusions are arranged at four corners of the upper end of the push rod; the push rod is arranged inside the punch mold, and a plurality of limiting blocks are arranged at the lower end of the push rod, and the plurality of limiting blocks are respectively clamped between two adjacent limiting protrusions; A punch fixing plate, the punch fixing plate being connected to the punch; A concave die fixing plate, wherein the concave die fixing plate is connected to the concave die; The guide device is provided with two groups, and the two groups of the guide devices are symmetrically arranged on the opposite sides of the male mold fixing device and the female mold fixing device.

2. A water pump blade twisting die according to claim 1, characterized in that: A mold handle is provided on the upper surface of the upper mold base, a pad is connected to the lower part of the upper mold base, a push rod groove is opened on the pad, a push spring is provided in the push rod groove, and one end of the push spring is connected to the end of the push rod.

3. A water pump blade twisting die according to claim 2, characterized in that: The lower die seat is provided with an ejector rod groove, in which an ejector compression spring is arranged, one end of the ejector compression spring is connected to the end of the ejector rod, and when the ejector compression spring is in the original state, the upper end of the ejector rod is flush with the topmost end of the arc portion of the lower die.

4. A water pump blade twisting die according to claim 3, characterized in that: The punch fixing plate is arranged below the backing plate, and the punch fixing plate is sleeved on the outside of the punch, and the horizontal movement of the punch is limited by the punch fixing plate.

5. A water pump blade twisting die according to claim 4, characterized in that: The die fixing plate is arranged on the upper surface of the lower die seat, and the die fixing plate is sleeved on the outside of the die, and the horizontal movement of the die is limited by the die fixing plate.

6. A water pump blade twisting die according to claim 5, characterized in that: Each group of the guide devices includes a guide column and a guide sleeve. The guide column is arranged on one side of the die fixing plate and is connected to the upper surface of the lower die seat. The guide sleeve is arranged outside the guide column and one end of the guide sleeve is connected to the lower surface of the upper die seat.

7. A water pump blade twisting die according to claim 6, characterized in that: The blade twisting die also includes a positioning component, which includes an upper die positioning hole and a lower die positioning hole. The upper die positioning hole is arranged through the upper die seat, the pad and one side of the punch fixing plate, and an upper die cylindrical pin is arranged in the upper die positioning hole; the lower die positioning hole is arranged through the concave die fixing plate and one side of the lower die seat, and a lower die cylindrical pin is arranged in the lower die positioning hole. The positions of the upper die positioning hole and the lower die positioning hole correspond to each other.

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