A composite mold for impeller anti-loosening pads

Abstract

A composite mold for impeller anti-loosening pads, relating to the field of composite mold technology, includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes a die cavity, a pusher plate, and a punch. The top of the die cavity has a downwardly recessed mounting groove. The pusher plate includes a mounting block that matches the mounting groove and is slidably embedded in the mounting groove. The bottom of the mounting block has a downwardly protruding pusher block, the shape of which matches the cavity and is slidably embedded in the cavity. A first mating hole is provided in the middle of the pusher block, penetrating through the pusher block, and the punch is slidably embedded in the mating hole. The lower mold assembly includes a punch and a die, the shapes of which match the main cavity and can be inserted into the cavity. The top of the punch and die has a downwardly recessed second mating hole for mating with the punch. In the closed state, a gap is formed between the inner wall of the punch and the outer wall of the punch and die. This composite mold can stamp and form the impeller anti-loosening pad in one step and complete the opening in the middle of the impeller anti-loosening pad, thereby improving processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of composite mold technology, and more specifically, to a composite mold for an impeller anti-loosening pad. Background Technology

[0002] Impeller anti-loosening gaskets are key components in mechanical equipment used to prevent impeller connections (such as bolts and nuts) from loosening due to vibration or load changes, significantly improving the reliability of the impeller system under complex operating conditions. One type of impeller anti-loosening gasket is used in locomotive diesel engines, such as... Figure 1 As shown, it needs to be processed into a thin sheet structure with a hole in the middle, and then the connecting ears on both sides are bent. In the prior art, it is usually necessary to first stamp to form a thin sheet, then punch holes in the thin sheet, and then perform bending operations. The operation steps are cumbersome and affect the processing efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a composite mold for impeller anti-loosening pads. It has a novel structure and can complete the opening, trimming, and bending operations in one stamping to form an impeller anti-loosening pad of a specific shape, thereby improving processing efficiency.

[0004] The embodiments of this utility model are implemented as follows:

[0005] A composite mold for an impeller anti-loosening pad includes an upper mold assembly and a lower mold assembly. The upper mold assembly includes a die cavity, a push plate, and a punch. The top of the die cavity is recessed downwards into a mounting groove, and the bottom wall of the mounting groove has a cavity. The shape of the cavity matches the shape of the impeller anti-loosening pad and extends through the bottom wall of the mounting groove. The cavity includes a main chamber corresponding to the main body of the impeller anti-loosening pad and a pair of auxiliary chambers corresponding to the mounting ears of the impeller anti-loosening pad. The pair of auxiliary chambers are symmetrically arranged on both sides of the main chamber. The push plate includes a mounting block that matches the mounting groove. The mounting block is slidably embedded in the mounting groove, and the bottom of the mounting block... The lower die assembly includes a punch and a die, the shape of which matches the main cavity and is slidably embedded in the cavity. The bottom of the punch and die assembly has a pair of protrusions, each corresponding to a pair of secondary cavities, which abut against the inner wall of the mounting groove. The middle of the punch and die assembly has a first mating hole that passes through the punch and the punch is slidably embedded in the mating hole. The lower die assembly includes a punch and a die, the shape of which matches the main cavity and can be inserted into the cavity. The top of the punch and die assembly has a second mating hole that is recessed downward for mating with the punch. In the closed state, a gap is formed between the inner wall of the protrusion and the outer wall of the punch and die assembly.

[0006] Furthermore, in other preferred embodiments of this invention, the diameter of the punch is equivalent to the inner diameter of the second mating hole.

[0007] Furthermore, in other preferred embodiments of this utility model, the thickness of the mounting block is less than the depth of the mounting groove, and the difference between the two is less than the thickness of the pusher block.

[0008] Furthermore, in other preferred embodiments of this utility model, when the top of the mounting block is flush with the top surface of the die, the bottom of the protrusion does not extend beyond the bottom of the die.

[0009] Furthermore, in other preferred embodiments of this utility model, the upper edge of the punch and die is provided with a rounded chamfer at the position corresponding to the secondary cavity.

[0010] Furthermore, in other preferred embodiments of this utility model, the upper mold assembly further includes an upper template, a mold handle, an ejector pin, an upper pad, and an upper fixing plate. The upper template and the mold handle are coaxially arranged, and the upper pad and the upper fixing plate are sequentially arranged at the bottom of the upper template. The upper template, the upper pad, and the upper fixing plate are connected by threaded parts. The mold handle and the upper pad are spaced apart, forming a cavity between the mold handle and the upper pad. The ejector pin passes through the mold handle along the axial direction of the mold handle, and an ejector plate is provided at the bottom of the ejector pin. An ejector pin is provided at the bottom of the ejector plate, and the ejector pin sequentially passes through the upper pad, the upper fixing plate, and is connected to the push plate.

[0011] Furthermore, in other preferred embodiments of this utility model, the die is disposed at the bottom of the upper fixed plate and is connected to the upper fixed plate by a threaded component; the top of the punch is provided with a disc-shaped limiting block, and the top of the upper fixed plate is provided with a limiting groove that matches the limiting block.

[0012] Furthermore, in other preferred embodiments of this utility model, the lower mold assembly further includes a lower template, and the punch and die are connected to the lower template via threaded parts.

[0013] Furthermore, in other preferred embodiments of this utility model, the lower mold assembly further includes a lower fixing plate, which surrounds the punch and die and is connected to the lower template via a threaded component; a stripper rubber ring is provided on the top of the lower fixing plate, which surrounds the punch and die; a stripper plate is provided on the top of the stripper rubber ring, and a matching groove matching the punch and die is provided in the middle of the stripper plate; the bottom surface of the stripper plate is not higher than the top surface of the punch and die.

[0014] Furthermore, in other preferred embodiments of this utility model, the lower template has guide posts arranged in the vertical direction, and the upper template is provided with guide sleeves that slide in cooperation with the guide posts.

[0015] The beneficial effects of this utility model embodiment are:

[0016] This utility model provides a composite mold for an impeller anti-loosening pad, comprising an upper mold assembly and a lower mold assembly. The upper mold assembly includes a die, a pusher plate, and a punch. The top of the die has a downwardly recessed mounting groove. The pusher plate includes a mounting block that matches the mounting groove and is slidably embedded in the mounting groove. The bottom of the mounting block has a downwardly protruding pusher block, the shape of which matches the cavity and is slidably embedded in the cavity. A first mating hole is provided in the middle of the pusher block, penetrating through the pusher block, and the punch is slidably embedded in the mating hole. The lower mold assembly includes a punch and a die, the shapes of which match the main cavity and can be inserted into the cavity. The top of the punch and die has a downwardly recessed second mating hole for mating with the punch. In the closed state, a gap is formed between the inner wall of the punch and the outer wall of the punch and die. This composite mold can stamp and form the impeller anti-loosening pad in one step and complete the opening in the middle of the impeller anti-loosening pad, thereby improving processing efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the impeller anti-loosening pad provided in an embodiment of this utility model;

[0019] Figure 2 A cross-sectional view of a composite mold for an impeller anti-loosening pad provided in an embodiment of this utility model;

[0020] Figure 3 A cross-sectional view of the upper mold assembly of a composite mold for an impeller anti-loosening pad provided in an embodiment of this utility model;

[0021] Figure 4 A cross-sectional view of the lower mold assembly of a composite mold for an impeller anti-loosening pad provided in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram showing the fit between the concave die, convex die, push plate, and unloading plate of a composite mold for an impeller anti-loosening pad provided in an embodiment of the present utility model.

[0023] Figure 6 This is a cross-sectional view showing the fit between the concave die, convex die, push plate, and stripper plate of a composite mold for an impeller anti-loosening pad provided in an embodiment of the present utility model.

[0024] Icons: 100-Composite mold; 110-Upper mold assembly; 111-Die; 1111-Mounting slot; 1112-Cavity; 1112a-Main chamber; 1112b-Secondary chamber; 112-Ejector plate; 1121-Mounting block; 1122-Ejector block; 1123-First mating hole; 1124-Bolt; 1125-Gap; 113-Punch; 1131-Limit block; 114-Upper template; 115-Mold shank; 1151-Ejector pin; 1152-Ejector plate; 1153-Ejector pin; 116-Upper pad; 117-Upper fixing plate; 118-Clamping cavity; 119-Guide sleeve; 120-Lower mold assembly; 121-Punch and die; 1211-Second mating hole; 122-Lower template; 123-Lower fixing plate; 124-Ejector rubber ring; 125-Ejector plate; 1251-Matching groove; 126-Guide post; 200-Impeller anti-loosening pad; 210-Impeller anti-loosening pad body; 220-Connecting ear. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0030] This embodiment provides a composite mold 100 for an impeller anti-loosening pad 200, such as... Figure 2 As shown, it includes an upper mold assembly 110 and a lower mold assembly 120.

[0031] Reference Figure 3 and Figure 4As shown, the upper mold assembly 110 includes a die 111, a pusher plate 112, and a punch 113. The top of the die 111 is recessed downwards to form a mounting groove 1111. The bottom wall of the mounting groove 1111 is provided with a cavity 1112. The shape of the cavity 1112 matches the shape of the impeller anti-loosening pad 200 and penetrates the bottom wall of the mounting groove 1111. The cavity 1112 includes a main chamber 1112a corresponding to the impeller anti-loosening pad body 210 and a pair of auxiliary chambers 1112b corresponding to the mounting ears of the impeller anti-loosening pad 200. The pair of auxiliary chambers 1112b are symmetrically arranged on both sides of the main chamber 1112a. The pusher plate 112 includes a mounting block 1121 that matches the mounting groove 1111. The mounting block 1121 is slidably embedded in the mounting groove 1111. The bottom of 1121 has a downwardly protruding pusher block 1122, the shape of which matches the cavity 1112 and is slidably embedded in the cavity 1112; the bottom of the pusher block 1122 has a pair of protrusions 1124, which correspond to a pair of secondary cavities 1112b and abut against the inner wall of the mounting groove 1111; the middle of the pusher block 1122 has a first mating hole 1123, which penetrates the pusher block 1122 and the punch 113 is slidably embedded in the mating hole; the lower die assembly 120 includes a punch and die 121, the shape of which matches the main cavity 1112a and can be inserted into the cavity 1112; the top of the punch and die 121 has a downwardly recessed second mating hole 1211 for mating with the punch 113; as Figure 5 and Figure 6 As shown, in the mold-closed state, a gap 1125 is formed between the inner wall of the protrusion 1124 and the outer wall of the die 121. When the mold is closed, the lower edge of the punch 113 is lower than the bottom surface of the die 111 and will contact the metal sheet first. Using the shearing force between the punch 113 and the second mating hole 1211 on the die 121, a hole is opened in the middle of the metal sheet. Next, as the upper mold assembly 110 continues to press down, the bottom surface of the die 111 contacts the metal sheet, and the die pushes the metal sheet into the cavity 1112. Using the shearing force between the die 111 and the die 121, the edge of the part is trimmed, and the formed part is placed in the cavity 1112. Subsequently, a pair of protrusions 1124 contact a pair of connecting ears 220 of the impeller anti-loosening pad 200 respectively. As the pair of protrusions 1124 are pressed down, the pair of connecting ears 220 are bent. The bent pair of connecting ears 220 enter the gap 1125 between the inner wall of the protrusion 1124 and the outer wall of the convex and concave mold 121, thus completing the final forming.

[0032] Furthermore, the diameter of the punch 113 is approximately equal to the inner diameter of the second mating hole 1211, thereby ensuring the machining accuracy of the punching.

[0033] like Figure 3 and Figure 6As shown, the thickness of the mounting block 1121 is less than the depth of the mounting groove 1111. When the part is squeezed into the cavity 1112, it pushes the mounting block 1121 upward until the top surface of the mounting block 1121 is flush with the top surface of the die 111. The difference between the thickness of the mounting block 1121 and the depth of the mounting groove 1111 is less than the thickness of the pusher block 1122. This design ensures that the pusher block 1122 always slides within the cavity 1112, preventing the part from entering the mounting groove 1111 and causing jamming.

[0034] Furthermore, when the top of the mounting block 1121 is flush with the top surface of the die 111, the bottom of the protrusion 1124 does not extend beyond the bottom of the die 111. This ensures that the die 111 preferentially contacts the metal sheet to complete the trimming operation. After the trimmed part enters the cavity 1112, the protrusion 1124 then contacts the part to complete the bending of the connecting lug 220.

[0035] Furthermore, such as Figure 5 and Figure 6 As shown, the upper edge of the punch and die 121 has a rounded chamfer at the position corresponding to the secondary cavity 1112b. This ensures that the machined part forms a chamfer transition at the bending position, avoiding stress cracking.

[0036] The upper mold assembly 110 also includes an upper template 114, a mold handle 115, an ejector pin 1151, an upper backing plate 116, and an upper fixing plate 117. The upper template 114 and the mold handle 115 are coaxially arranged. The upper backing plate 116 and the upper fixing plate 117 are sequentially arranged at the bottom of the upper template 114. The upper template 114, the upper backing plate 116, and the upper fixing plate 117 are connected by threaded parts. The mold handle 115 and the upper backing plate 116 are spaced apart, forming a cavity 118 between the mold handle 115 and the upper backing plate 116. The ejector pin 1151 passes through the mold handle 115 along the axial direction of the mold handle 115. An ejector plate 1152 is provided at the bottom of the ejector pin 1151. An ejector pin 1153 is provided at the bottom of the ejector plate 1152. The ejector pin 1153 passes through the upper backing plate 116 and the upper fixing plate 117 in sequence and is connected to the pusher plate 112. The push rod 1151 can move downward under the drive of the drive device, and the push plate 112 can be moved up and down by the push plate 1152 and the push pin 1153, so as to push the cut impeller anti-loosening pad 200 out of the cavity 1112.

[0037] Furthermore, the die 111 is located at the bottom of the upper fixed plate 117 and is connected to the upper fixed plate 117 via a threaded connection; the top of the punch 113 is provided with a disc-shaped limiting block 1131, and the top of the upper fixed plate 117 is provided with a limiting groove that matches the limiting block 1131. This structure allows for the detachable connection of the punch 113, facilitating maintenance and replacement.

[0038] Furthermore, such as Figure 4As shown, the lower mold assembly 120 also includes a lower template 122, and the punch and die 121 are connected to the lower template 122 via threaded connections. The lower mold assembly 120 also includes a lower fixing plate 123, which surrounds the punch and die 121 and is connected to the lower template 122 via threaded connections. A stripper rubber ring 124 is provided on the top of the lower fixing plate 123, and the stripper rubber ring 124 surrounds the punch and die 121. A stripper plate 125 is provided on the top of the stripper rubber ring 124, and a matching groove 1251 matching the punch and die 121 is provided in the middle of the stripper plate 125. The bottom surface of the stripper plate 125 is not higher than the top surface of the punch and die 121. When the die 111 is pressed down, the stripper rubber ring 124 is compressed, and the stripper plate 125 continuously applies pressure to the metal sheet under the action of the rebound force, which plays a role in fixing it, and at the same time, a space for accommodating excess material is formed between the die 111 and the stripper plate 125.

[0039] The lower mold plate 122 has guide posts 126 arranged vertically, and the upper mold plate 114 has guide sleeves 119 that slide with the guide posts 126. The cooperation between the guide posts 126 and the guide sleeves 119 can ensure the accuracy of mold closing and improve the stamping quality.

[0040] In summary, this utility model embodiment provides a composite mold 100 for an impeller anti-loosening pad 200, which includes an upper mold assembly 110 and a lower mold assembly 120. The upper mold assembly 110 includes a die cavity 111, a pusher plate 112, and a punch 113. The top of the die cavity 111 is recessed with a mounting groove 1111. The pusher plate 112 includes a mounting block 1121 that matches the mounting groove 1111. The mounting block 1121 is slidably embedded in the mounting groove 1111. The bottom of the mounting block 1121 is protruding with a pusher block 1122. The shape of the pusher block 1122 is consistent with the shape of the cavity 1111. The punch 113 is slidably embedded in the cavity 1112, and the pusher block 1122 has a first mating hole 1123 in the middle, which penetrates the pusher block 1122. The punch 113 is slidably embedded in the mating hole. The lower die assembly 120 includes a punch and die 121, the shape of which matches the main cavity 1112a and can be inserted into the cavity 1112. The top of the punch and die 121 is recessed downward for mating with the punch 113. In the closed state, a gap 1125 is formed between the inner wall of the protrusion 1124 and the outer wall of the punch and die 121. This composite mold 100 can stamp the impeller anti-loosening pad 200 in one go and complete the opening in the middle of the impeller anti-loosening pad 200, thereby improving the processing efficiency.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A composite mold for an impeller anti-loosening pad, characterized in that, The device includes an upper die assembly and a lower die assembly. The upper die assembly includes a die cavity, a push plate, and a punch. The top of the die cavity is recessed into a mounting groove, and the bottom wall of the mounting groove has a cavity. The shape of the cavity matches the shape of the impeller anti-loosening pad and extends through the bottom wall of the mounting groove. The cavity includes a main chamber corresponding to the impeller anti-loosening pad body and a pair of auxiliary chambers corresponding to the mounting ears of the impeller anti-loosening pad. The pair of auxiliary chambers are symmetrically arranged on both sides of the main chamber. The push plate includes a mounting block that matches the mounting groove. The mounting block is slidably embedded in the mounting groove, and the bottom of the mounting block has a downwardly protruding push block. The shape of the pusher block matches the cavity and is slidably embedded in the cavity; a pair of protrusions are provided at the bottom of the pusher block, the pair of protrusions corresponding to a pair of secondary cavities and abutting against the inner wall of the mounting groove; a first mating hole is provided in the middle of the pusher block, the mating hole penetrates the pusher block, and the punch is slidably embedded in the mating hole; the lower mold assembly includes a punch and a die, the shape of which matches the main cavity and can be inserted into the cavity; a second mating hole for mating with the punch is recessed downward at the top of the punch and die; in the mold closed state, a gap is formed between the inner sidewall of the protrusion and the outer wall of the punch and die.

2. The composite mold for impeller anti-loosening pads according to claim 1, characterized in that, The diameter of the punch is equivalent to the inner diameter of the second mating hole.

3. The composite mold for impeller anti-loosening pads according to claim 2, characterized in that, The thickness of the mounting block is less than the depth of the mounting groove, and the difference between the two is less than the thickness of the pusher block.

4. The composite mold for impeller anti-loosening pads according to claim 3, characterized in that, When the top of the mounting block is flush with the top surface of the die, the bottom of the protrusion does not extend beyond the bottom of the die.

5. The composite mold for an impeller anti-loosening pad according to claim 4, characterized in that, The upper edge of the punch and die is provided with a rounded chamfer at the position corresponding to the secondary cavity.

6. The composite mold for an impeller anti-loosening pad according to claim 5, characterized in that, The upper mold assembly further includes an upper template, a mold handle, an ejector pin, an upper pad, and an upper fixing plate. The upper template and the mold handle are coaxially arranged. The upper pad and the upper fixing plate are sequentially arranged at the bottom of the upper template. The upper template, the upper pad, and the upper fixing plate are connected by threaded parts. The mold handle and the upper pad are spaced apart, forming a cavity between the mold handle and the upper pad. The ejector rod passes through the mold shank along the axial direction of the mold shank. A ejector plate is provided at the bottom of the ejector rod, and an ejector pin is provided at the bottom of the ejector plate. The ejector pin passes through the upper pad, the upper fixing plate and is connected to the push plate in sequence.

7. The composite mold for an impeller anti-loosening pad according to claim 6, characterized in that, The die is disposed at the bottom of the upper fixed plate and is connected to the upper fixed plate by a threaded component; the top of the punch is provided with a disc-shaped limiting block, and the top of the upper fixed plate is provided with a limiting groove that matches the limiting block.

8. The composite mold for an impeller anti-loosening pad according to claim 7, characterized in that, The lower mold assembly also includes a lower template, and the punch and die are connected to the lower template via threaded parts.

9. The composite mold for an impeller anti-loosening pad according to claim 8, characterized in that, The lower mold assembly further includes a lower fixing plate, which surrounds the punch and die and is connected to the lower mold plate via a threaded component; a stripper rubber ring is provided on the top of the lower fixing plate, which surrounds the punch and die; a stripper plate is provided on the top of the stripper rubber ring, and a matching groove matching the punch and die is provided in the middle of the stripper plate; the bottom surface of the stripper plate is not higher than the top surface of the punch and die.

10. The composite mold for impeller anti-loosening pads according to claim 9, characterized in that, The lower template has guide posts arranged in a vertical direction, and the upper template has guide sleeves that slide in cooperation with the guide posts.

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