Forming die of water pump bearing sleeve

Abstract

The invention belongs to the field of dies, and particularly relates to a water pump bearing bush forming die which comprises an upper die plate and a lower die plate, a female die is arranged above the lower die plate, a stamping hole is formed in the upper surface of the female die, and the stamping hole is used for containing a stainless steel barrel-shaped workpiece to be formed; a male die is arranged below the upper die plate, a material ejecting hole is formed in the middle of the upper surface of the male die in the vertical direction in a penetrating mode, and a plurality of material returning grooves are evenly formed in the middle of the male die in the horizontal direction. The upper portion of the male die is sleeved with a blank holder. A material returning assembly is arranged in the male die and comprises a piece ejecting column, the piece ejecting column is arranged in a piece ejecting hole of the male die, piece returning devices are arranged below the piece ejecting column, and the outer diameter ends of the piece returning devices are connected through the same piece returning spring. According to the water pump bearing stamping die, a needed water pump bearing can be directly stamped, and a formed workpiece can be conveniently taken out from the interior of the female die.

Description

Technical Field

[0001] This invention belongs to the field of molds, and specifically relates to a forming mold for a water pump bearing sleeve. Background Technology

[0002] Currently, water pump bearings are typically made by direct casting of gray iron. During the casting process, such as smelting, pouring, and cleaning, dust and fumes are easily emitted, adversely affecting the surrounding air environment. Moreover, water pump bearings manufactured in this way require further machining before they can be finished products, reducing production efficiency and increasing production costs. At the same time, the overall weight of gray iron cast water pump bearing sleeves is relatively high, which is not conducive to the lightweight design of water pumps and increases the burden of transportation and assembly. When using this type of water pump bearing sleeve in harsh environments, the water pump bearing sleeve is easily damaged due to the corrosion resistance of gray iron, which leads to increased maintenance costs. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a forming mold for a water pump bearing sleeve, which can directly stamp out the required water pump bearing and facilitates the removal of the formed workpiece from the inside of the die.

[0004] The technical solution of the present invention is: a forming mold for a water pump bearing sleeve, comprising an upper mold plate and a lower mold plate, wherein the upper mold plate and the lower mold plate are connected to a guide post via a guide sleeve, and the forming mold further comprises: A die is disposed above a lower template. An extension hole is provided in the middle of the lower surface of the die, and a protrusion is provided on the upper surface of the die. A punching hole is provided in the middle of the protrusion along the vertical direction. The punching hole is used to place a cylindrical stainless steel workpiece to be formed, and the punching hole extends into the interior of the die and is connected to the extension hole. The inner diameter of the punching hole is larger than the inner diameter of the extension hole. A pressing edge is provided between the punching hole and the extension hole. A punch is positioned below the upper template and matches the extension hole on the die. A ejector hole is vertically penetrating the center of the upper surface of the punch, and several ejector grooves are evenly distributed horizontally in the center of the punch, all of which are connected to the ejector hole. A first push-out hole is horizontally penetrating the upper part of the punch, and the first push-out hole is located above the ejector grooves. A pressure ring is fitted on the upper part of the punch, the top of the pressure ring is connected to the upper template, and a second push-out hole is horizontally penetrating the center of the pressure ring. The bottom of the pressure ring has a bent portion that slopes inward and matches the protrusion on the die. A material ejection assembly is disposed inside the punch. The material ejection assembly includes an ejector post disposed within the ejector hole of the punch. A third ejector hole is horizontally penetrating the middle of the ejector post, and the third ejector hole communicates with a first ejector hole and a second ejector hole. The bottom end of the ejector post is hemispherical. A material ejector is disposed below the ejector post. The material ejector is composed of several fan-shaped material ejector plates, which are respectively disposed inside several material ejector grooves. A hemispherical recess is disposed in the middle of the material ejector composed of several material ejector plates, and the hemispherical recess is located inside the ejector hole. The outer diameter ends of the several material ejector plates are connected by the same material ejector spring. The movable component includes a push plate and an inclined pusher. The inclined push plate is disposed on one side of the die cavity, and an abutting inclined surface is provided on the upper part of one side of the inclined push plate. The push plate is slidably disposed inside the punch, the pressure ring, and the ejector post through a first push hole, a second push hole, and a third push hole. A spring cylinder is provided at one end of the push plate, and the side wall of the push plate is connected to the spring cylinder by a push spring. The spring cylinder is disposed on the lower surface of the upper template. The other end of the push plate extends to abut against the abutting inclined surface of the inclined push plate, and the end of the push plate that abuts against the inclined push plate is inclined. A receiving groove is provided in the middle of the upper surface of the push plate. The receiving groove matches the ejector post, and the receiving groove and the upper surface of the push plate are connected by an arc transition.

[0005] Furthermore, a top ejector spring is connected to the top of the top ejector column. The top ejector spring is located inside the upper template. A cover plate is connected to the top of the top ejector spring. The cover plate, the upper template, and the punch are connected in sequence by screws.

[0006] Furthermore, a mounting hole is provided on one side of the lower template. The inclined pusher is installed on the lower template through the mounting hole and connected to the side wall of the die by screws. The top of the inclined pusher's abutting inclined surface extends into the clearance hole opened on the upper template, and the abutting inclined surface is slidably connected to the upper template through the clearance hole.

[0007] Furthermore, one end of the push spring is connected to the inner wall of the spring cylinder, and the other end of the push spring is connected to a top plate. The top plate is slidably connected to the inner wall of the spring cylinder, and the top plate is connected to the end of the push plate by a pin.

[0008] Furthermore, the lower template has a blanking hole extending vertically through its middle section. The blanking hole is connected to an extension hole on the die, and the inner diameter of the blanking hole is larger than the inner diameter of the extension hole.

[0009] Furthermore, the inner wall of the punching hole and the inner wall of the extension hole are connected by an inclined pressing edge.

[0010] Preferably, the punching hole and the extension hole together form a stepped hole through a horizontally arranged pressing edge.

[0011] Preferably, the lower template has a plurality of ejection holes evenly distributed on it. Each ejection hole penetrates the die and communicates with the stamping hole. The ejection holes are arranged in a circumferential array below the pressing edge. Each ejection hole has a push rod inside it. The push rods abut against the workpiece placed inside the stamping hole.

[0012] The beneficial effects of this invention are as follows: A cylindrical workpiece to be processed is placed in the stamping hole of a die. The upper template pushes the punch downwards, causing it to extend into the stamping hole of the die and press down on the bottom surface of the workpiece. This causes the bottom surface of the workpiece to gradually bend downwards until it fits against the pressure edge inside the die. The upper template and punch continue to move downwards, causing the punch to punch a notch in the workpiece. Simultaneously, the bent portion at the bottom of the pressure edge gradually presses down, bending the top of the workpiece's side wall inwards until the top of the workpiece fits against the bent portion. This directly stamps the initially cylindrical workpiece into a water pump bearing sleeve, eliminating the need for further machining, thus improving production efficiency and reducing production costs. Furthermore, the moving component and ejection component separate the stamped workpiece from the inner wall of the die, ensuring that workers can easily remove the workpiece from the die. The stainless steel stamped water pump bearing sleeve does not generate air pollution during manufacturing, reduces its weight, and improves its corrosion resistance, thereby reducing the maintenance cost of the water pump bearing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a cross-sectional schematic diagram of the stamping state in one embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of the stamping completed state in one embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of another angle stamping state in one embodiment of the present invention; Figure 4 This is a cross-sectional schematic diagram of another angle stamping completion state in one embodiment of the present invention; Figure 5 This is a top view half-section schematic diagram of an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the ejector device of the present invention; Figure 7 This is a schematic diagram of the push plate structure of the present invention; Figure 8 This is a cross-sectional view of the stamping state in another embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "one side," "one end," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0017] like Figure 1-7 As shown, a forming mold for a water pump bearing sleeve includes an upper template 1 and a lower template 2. The upper template 1 and the lower template 2 are connected to a guide post 21 via a guide sleeve 11. The forming mold also includes a concave mold 3, a convex mold 4, a material ejection assembly 5, and a moving assembly 6.

[0018] Among them, such as Figure 1-2 As shown, the die 3 is positioned above the lower template 2. An extension hole 31 is provided in the middle of the lower surface of the die 3, and a protrusion 32 is provided on the upper surface of the die 3. A punching hole 33 is provided in the middle of the protrusion 32 along the vertical direction. The punching hole 33 is used to place a cylindrical stainless steel workpiece 7 to be formed. The punching hole 33 extends into the interior of the die 3 and communicates with the extension hole 31. The inner diameter of the punching hole 33 is larger than the inner diameter of the extension hole 31. A pressing edge 34 is provided between the punching hole 33 and the extension hole 31. It should be noted that, in this embodiment, the workpiece 7 to be formed is a cylindrical stainless steel barrel.

[0019] Specifically, a blanking hole 22 is provided vertically through the middle of the lower template 2. The blanking hole 22 is connected to the extension hole 31 opened on the die 3, and the inner diameter of the blanking hole 22 is larger than the inner diameter of the extension hole 31. The waste material under stamping is allowed to fall directly out from the inside of the forming mold through the blanking hole 22.

[0020] Furthermore, the inner wall of the stamping hole 33 and the inner wall of the extension hole 31 are connected by an inclined pressing edge 34.

[0021] Based on the above embodiments, when processing the cylindrical workpiece 7 to be formed, the bottom surface of the workpiece 7 will gradually bend downward to form a first bending surface 71 until the first bending surface 71 is in contact with the pressing edge 34.

[0022] In this embodiment, as Figure 3-5 As shown, the punch 4 is located below the upper template 1, and the punch 4 matches the extension hole 31 opened on the die 3. The upper surface of the punch 4 has a vertical ejector hole 41 through the middle. The middle of the punch 4 has a plurality of ejector grooves 42 evenly arranged in the horizontal direction, and the plurality of ejector grooves 42 are all connected to the ejector hole 41. The upper part of the punch 4 has a first push hole 43 through the horizontal direction, and the first push hole 43 is located above the ejector groove 42. The upper part of the punch 4 is fitted with a pressure ring 44. The top of the pressure ring 44 is connected to the upper template 1. The middle part of the pressure ring 44 has a second push hole 45 through the horizontal direction. The bottom of the pressure ring 44 has a bent part 46 that is inclined inward, and the bent part 46 matches the protrusion 32 on the die 3.

[0023] Based on the above embodiments, the upper template 1 pushes the punch 4 downward, causing the punch 4 to extend into the interior of the punching hole 33 on the die 3. The upper template 1 and punch 4 are then pushed downward, causing the bottom end of the punch 4 to contact the bottom surface of the workpiece 7. The upper template 1 and punch 4 are then pushed downward, causing the bottom end of the punch 4 to press down on the bottom surface of the workpiece 7, gradually bending the bottom surface of the workpiece 7 downward until the formed first bending surface 71 is in contact with the pressing edge portion 34 inside the die 3. At this time, the pressing edge ring 44 outside the punch 4 contacts the top of the side wall of the workpiece 7. The upper template 1 and punch 4 are then pushed downward again. The punch 4 moves down, punches the workpiece 7 to make a notch and gradually extends into the interior of the extension hole 31. At the same time, the bent part 46 at the bottom of the pressure ring 44 gradually presses down to bend the top of the side wall of the workpiece 7 inward to form a second bending surface 72 until the second bending surface 72 is in contact with the bent part 46 at the bottom of the pressure ring 44, thus completing the processing of the workpiece 7. The two ends of the workpiece 7 have a first bending surface 71 and a second bending surface 72 respectively. At this time, the bent part 46 of the pressure ring 44 is in contact with the protrusion 32 of the die 3, and the upper template 1 and the punch 4 can no longer move downward.

[0024] In this embodiment, as Figure 1-4 and Figure 6As shown, the ejector assembly 5 is disposed inside the punch 4. The ejector assembly 5 includes an ejector post 51, which is disposed inside the ejector hole 41 of the punch 4. A third push hole 52 is provided through the middle of the ejector post 51 in the horizontal direction. The third push hole 52 is connected to the second push hole 45 through the first push hole 43. The bottom end of the ejector post 51 is hemispherical. An ejector 53 is disposed below the ejector post 51. The ejector 53 is composed of several fan-shaped ejector plates 531. The several ejector plates 531 are respectively disposed inside several ejector grooves 42. A hemispherical recess 532 is provided in the middle of the ejector 53 composed of several ejector plates 531. The hemispherical recess 532 is located inside the ejector hole 41. The outer diameter ends of the several ejector plates 531 are connected by the same ejector spring 54.

[0025] The top of the top post 51 is connected to a top spring 55, which is located inside the upper template 1. The top of the top of the top spring 55 is connected to a cover plate 56, and the cover plate 56, the upper template 1 and the punch 4 are connected in sequence by screws.

[0026] Based on the above embodiments, when the top post 51 moves downward under the action of the top spring 55, the hemispherical bottom end of the top post 51 causes the several ejector plates 531 that make up the ejector 53 to gradually separate, so that each ejector plate 531 moves out from its corresponding ejector groove 42 until it contacts the inner wall of the workpiece 7. At this time, the punch 4 moves upward, and the workpiece 7 can be moved from the punching hole 33 of the die 2 through the several ejector plates 531, which makes it convenient for the workers to take out the formed workpiece 7 from the punching hole 33 of the die 2.

[0027] In this embodiment, as Figure 1-4 and Figure 7As shown, the moving assembly 6 includes a push plate 61 and an inclined pusher 62. The inclined pusher 62 is disposed on one side of the die 2, and an abutting inclined surface 621 is provided on the upper part of one side of the inclined pusher 62. The push plate 61 is slidably disposed inside the punch 4, the pressure ring 44, and the ejector post 51 through the first pusher hole 43, the second pusher hole 45, and the third pusher hole 52. A spring cylinder 63 is provided at one end of the push plate 61, and the side wall of the push plate 61 and the spring cylinder 63 are connected by a pusher spring 64. The spring cylinder 63 is disposed on the lower surface of the upper template 1. The other end of the push plate 61 extends to abut against the abutting inclined surface 621 of the inclined pusher 62, and the push plate 61 abuts against the inclined pusher 62. One end of the push plate 61 is inclined; a receiving groove 65 is provided in the middle of the upper surface of the push plate 61. The receiving groove 65 matches the top post 51, and the receiving groove 65 and the upper surface of the push plate 61 are connected by an arc transition. It should be noted that the push spring 64 is always in a compressed state. When the upper template 1 and the punch 4 move upward and drive the push plate 61 to move upward, the push plate 61 moves horizontally under the action of the push spring 64, ensuring that one end of the push plate 61 always abuts against the abutting inclined surface 621 of the inclined push plate 62. When the upper template 1 and the punch 4 move upward and drive the push plate 61 to move downward, the push plate 61 moves horizontally under the action of the abutting inclined surface 621, compressing the push spring 64.

[0028] The lower template 2 has a mounting hole 23 on one side. The inclined pusher 62 is installed on the lower template 2 through the mounting hole 23. The inclined pusher 62 is connected to the side wall of the cavity 3 by screws. The top of the inclined pusher 62 with the abutting inclined surface 621 extends into the clearance hole 12 opened on the upper template 1, and the abutting inclined surface 621 is slidably connected to the upper template 1 through the clearance hole 12.

[0029] Specifically, one end of the push spring 64 is connected to the inner wall of the spring cylinder 63, and the other end of the push spring 64 is connected to the top plate 66. The top plate 66 is slidably connected to the inner wall of the spring cylinder 63, and the top plate 66 is connected to the end of the push plate 61 by a pin.

[0030] Based on the above embodiments, after the workpiece 7 is processed, the upper template 1 is moved upward, causing the upper template 1 to drive the punch 4, pressure ring 44, spring cylinder 63, and push plate 61 below it to move upward. During this process, the push plate 61 moves horizontally under the action of the push spring 64 and the inclined surface 621 in the inclined push plate 61, so that the receiving groove 65 gradually moves to the third push hole 53 and connects. The top post 51 moves downward under the action of the top spring 55, causing the several ejector plates 531 to separate from each other. At this time, the several ejector plates 531 extend to the outside of the ejector groove 42 on the punch 4 and abut against the inner wall of the formed workpiece 7; the upper template 1 continues to move upward, and the ejector plates... 531 pulls the formed workpiece 7 upward, separating the outer wall of the workpiece 7 from the inner wall of the die 3, making it easier for the operator to remove the formed workpiece 7 from the punching hole 33 of the die 3; it should be noted that, although during the downward movement of the upper template 1, the push plate 61 moves horizontally under the action of the abutting inclined surface 621, causing the top post 51 to move out of the receiving groove 65, during this process, the top post 51 moves out from between several ejector plates 531, and the several ejector plates 531 move closer to each other under the action of the ejector spring 54, and place the several ejector plates 531 back into their corresponding ejector grooves 42, so as to avoid affecting the next workpiece 7 to be formed. Example 2

[0031] like Figure 8 As shown, the difference between this embodiment and embodiment one is that the die 3 in embodiment one is replaced. In this embodiment, the punching hole 33 and the extension hole 31 in the die 3 together form a stepped hole through the horizontally set pressing part 34. In this embodiment, the workpiece 7 is a cylindrical barrel made of stainless steel, and the bottom of the formed workpiece 7 is a horizontally bent surface 73.

[0032] Based on the above embodiments, the upper template 1 pushes the punch 4 downward, so that the punch 4 extends into the interior of the punching hole 33 on the die 3 and contacts the bottom surface of the workpiece 7; the upper template 1 and the punch 4 continue to be pushed downward, and the bottom end of the punch 4 presses down on the bottom surface of the workpiece 7, punching a notch on the bottom surface of the workpiece 7 and gradually extending into the interior of the extension hole 31. The stamped waste material falls out of the forming mold through the blanking hole 22 on the lower template 2. At this time, the pressure ring 44 outside the punch 4 contacts the top of the side wall of the workpiece 7; the upper template 1 and the punch 4 are pushed downward again, and the bent part 46 at the bottom of the pressure ring 44 gradually presses down to bend the top of the side wall of the workpiece 7 inward to form a second bending surface 72, until the second bending surface 72 fits with the bent part 46 at the bottom of the pressure ring 44, completing the processing of the workpiece 7. The formed workpiece 7 has a horizontal bending surface 73 and a second bending surface 72 at both ends.

[0033] The lower template 2 has a number of ejection holes 24 evenly distributed. The ejection holes 24 penetrate the die 3 and are connected to the stamping hole 33. The ejection holes 24 are arranged in a circumferential array below the pressing part 34. Each ejection hole 24 has a push rod inside it. The push rods abut against the workpiece 7 placed inside the stamping hole.

[0034] Based on the above embodiments, after the workpiece 7 is processed, the outer wall of the workpiece 7 can be separated from the inner wall of the die 3 by a number of push rods, making it convenient for the workers to take the formed workpiece 7 out of the punching hole 33 of the die 3.

[0035] The working principle of this invention is as follows: The cylindrical workpiece 7 to be processed is placed in the punching hole 33 of the die 3. The upper template 1 pushes the punch 4 downward, so that the punch 4 extends into the punching hole 33 of the die 3 and contacts the bottom surface of the workpiece 7. The upper template 1 and the punch 4 continue to be pushed downward, and the bottom end of the punch 4 presses down on the bottom surface of the workpiece 7, so that the bottom surface of the workpiece 7 gradually bends downward until the first bending surface 71 formed is in contact with the pressing edge part 34 inside the die 3. At this time, the pressing edge ring 44 outside the punch 4 is in contact with the top of the side wall of the workpiece 7. Touch; push the upper template 1 and punch 4 down again, punch 4 punches out a notch in the workpiece 7 and gradually extends into the interior of the extension hole 31. At the same time, the bending part 46 at the bottom of the pressure ring 44 gradually presses down to bend the top of the side wall of the workpiece 7 inward to form a second bending surface 72 until the second bending surface 72 and the bending part 46 at the bottom of the pressure ring 44 are in contact, thus completing the processing of the workpiece 7 with the first bending surface 71 and the second bending surface 72 at both ends, that is, punching the workpiece 7, which is initially cylindrical, into a water pump bearing sleeve with bending surfaces at both ends; After the workpiece 7 is processed, the upper template 1 is moved upward, causing the upper template 1 to move the punch 4, pressure ring 44, spring cylinder 63 and push plate 61 below it upward. The push plate 61 moves horizontally under the action of push spring 64 and abutting inclined surface 621, so that the receiving groove 65 gradually moves to the third push hole 53 and connects. The ejector column 51 moves downward under the action of ejector spring 55. The ejector column 51 gradually moves between several ejector plates 531, so that several ejector plates 531 separate from each other and extend to the outside of ejector groove 42. Several ejector plates 531 abut against the inner wall of the formed workpiece 7 respectively. The upper template 1 continues to move upward, and the ejector plates 531 pull the formed workpiece 7 upward, so that the outer wall of the workpiece 7 separates from the inner wall of the die 3, making it convenient for the operator to take the formed workpiece 7 out of the punching hole 33 of the die 3. Furthermore, the cylindrical workpiece 7 to be processed is placed in the punching hole 33 of the die 3, and the upper template 1 and the punch 4 are pushed down so that the punch 4 extends into the punching hole 33 of the die 3 and contacts the bottom surface of the workpiece 7; the upper template 1 and the punch 4 are pushed down again, and the bottom end of the punch 4 presses down on the bottom surface of the workpiece 7, punching a notch on the bottom surface of the workpiece 7 and gradually extending into the extension hole 31. At this time, the pressure ring 44 outside the punch 4 contacts the top of the side wall of the workpiece 7; the upper template 1 and the punch 4 are pushed down again, and the bent part 46 at the bottom of the pressure ring 44 is gradually pressed down to bend the top of the side wall of the workpiece 7 inward to form a second bending surface 72, until the second bending surface 72 and the bent part 46 at the bottom of the pressure ring 44 are in contact, thus completing the processing of the workpiece 7 with a horizontal bending surface 73 and a second bending surface 72 at both ends respectively; After the workpiece 7 with the horizontal bending surface 73 is processed, the outer wall of the workpiece 7 can be separated from the inner wall of the die 3 by several push rods, so that the workers can take the formed workpiece 7 out of the punching hole 33 of the die 3.

[0036] Finally, it should be noted that the above description 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A forming die for a water pump bearing sleeve comprising an upper die plate and a lower die plate, the upper die plate and the lower die plate being connected by a guide sleeve and a guide post, characterized in that, The forming mold further includes: A die is disposed above a lower template. An extension hole is provided in the middle of the lower surface of the die, and a protrusion is provided on the upper surface of the die. A punching hole is provided in the middle of the protrusion along the vertical direction. The punching hole is used to place a cylindrical stainless steel workpiece to be formed, and the punching hole extends into the interior of the die and is connected to the extension hole. The inner diameter of the punching hole is larger than the inner diameter of the extension hole. A pressing edge is provided between the punching hole and the extension hole. A punch is positioned below the upper template and matches the extension hole on the die. A ejector hole is vertically penetrating the center of the upper surface of the punch, and several ejector grooves are evenly distributed horizontally in the center of the punch, all of which are connected to the ejector hole. A first push-out hole is horizontally penetrating the upper part of the punch, and the first push-out hole is located above the ejector grooves. A pressure ring is fitted on the upper part of the punch, the top of the pressure ring is connected to the upper template, and a second push-out hole is horizontally penetrating the center of the pressure ring. The bottom of the pressure ring has a bent portion that slopes inward and matches the protrusion on the die. A material ejection assembly is disposed inside the punch. The material ejection assembly includes an ejector post disposed within the ejector hole of the punch. A third ejector hole is horizontally penetrating the middle of the ejector post, and the third ejector hole communicates with a first ejector hole and a second ejector hole. The bottom end of the ejector post is hemispherical. A material ejector is disposed below the ejector post. The material ejector is composed of several fan-shaped material ejector plates, which are respectively disposed inside several material ejector grooves. A hemispherical recess is disposed in the middle of the material ejector composed of several material ejector plates, and the hemispherical recess is located inside the ejector hole. The outer diameter ends of the several material ejector plates are connected by the same material ejector spring. The movable component includes a push plate and an inclined pusher. The inclined push plate is disposed on one side of the die cavity, and an abutting inclined surface is provided on the upper part of one side of the inclined push plate. The push plate is slidably disposed inside the punch, the pressure ring, and the ejector post through a first push hole, a second push hole, and a third push hole. A spring cylinder is provided at one end of the push plate, and the side wall of the push plate is connected to the spring cylinder by a push spring. The spring cylinder is disposed on the lower surface of the upper template. The other end of the push plate extends to abut against the abutting inclined surface of the inclined push plate, and the end of the push plate that abuts against the inclined push plate is inclined. A receiving groove is provided in the middle of the upper surface of the push plate. The receiving groove matches the ejector post, and the receiving groove and the upper surface of the push plate are connected by an arc transition.

2. A forming die for a water pump bearing sleeve as defined in claim 1, wherein The top of the top post is connected to a top spring, which is located inside the upper template. The top of the top spring is connected to a cover plate, and the cover plate, the upper template, and the punch are connected in sequence by screws.

3. A forming die for a water pump bearing sleeve as defined in claim 2, wherein The lower template has a mounting hole on one side. The inclined pusher is installed on the lower template through the mounting hole. The inclined pusher is connected to the side wall of the die by screws. The top of the inclined pusher's abutting inclined surface extends into the clearance hole opened on the upper template, and the abutting inclined surface is slidably connected to the upper template through the clearance hole.

4. A forming die for a water pump bearing sleeve as defined in claim 3 wherein, One end of the push spring is connected to the inner wall of the spring cylinder, and the other end of the push spring is connected to a top plate. The top plate is slidably connected to the inner wall of the spring cylinder, and the top plate is connected to the end of the push plate by a pin.

5. A forming die for a water pump bearing sleeve as defined in claim 4 wherein, The lower template has a blanking hole that runs vertically through the middle. The blanking hole is connected to an extension hole on the die, and the inner diameter of the blanking hole is larger than the inner diameter of the extension hole.

6. A forming die for a water pump bearing sleeve as defined in claim 5 wherein, The inner wall of the punching hole and the inner wall of the extension hole are connected by an inclined pressing edge.

7. A forming die for a water pump bearing sleeve as defined in claim 5 wherein, The punching hole and the extension hole together form a stepped hole through the horizontally set pressing edge.

8. A forming die for a water pump bearing sleeve as defined in claim 7, wherein The lower template is evenly provided with a number of ejection holes, each of which penetrates the die and communicates with the stamping hole. The ejection holes are arranged in a circumferential array below the pressing edge. Each ejection hole is provided with a push rod inside, and the push rods abut against the workpiece placed inside the stamping hole.

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