Normal pressure type finishing die for thin-wall ring spring

Abstract

The utility model discloses a thin-wall ring spring normal pressure type finishing die, which relates to the technical field of plastic forming of automobile transmission parts, and comprises a finishing upper die and an edge pressing assembly, an upper die retaining sleeve is arranged on the outer side of the upper end of the finishing upper die, and the edge pressing assembly is arranged on the lower portion of the upper die retaining sleeve. The blank pressing assembly comprises a compression spring, an upper blank pressing die and an upper die large sleeve, the bottom of the upper die retaining sleeve is connected with the compression spring, the bottom of the compression spring is connected with the upper blank pressing die, the outer side of the upper blank pressing die is slidably connected with the upper die large sleeve, a forging stock is arranged at the bottom of the upper finishing die, and the bottom of the forging stock is connected with a lower finishing die. According to the spring normal-pressure type finishing die for the thin-wall ring piece, the blank pressing assembly is arranged, the characteristic that a compression spring on the blank pressing upper die freely stretches out and draws back under the condition that different acting force is borne is utilized, the blank pressing upper die is tightly attached to the upper end face of a forge piece all the time, and therefore the problems that the ring piece protrudes to form a thin wall, and a flange irregularly deforms can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic forming of automobile gearbox components, in particular to a thin-walled ring spring normal pressure finishing die. Background Art

[0002] Thin-walled rings are a key component in the electric drive axle of new energy vehicles and are safety components. The main function of their teeth is to transmit power. When the car goes from normal travel to stop, the teeth of the thin-walled rings are subjected to large torque and impact loads, which are prone to noise and tooth breakage. This requires the teeth of the thin-walled rings to have high tooth profile accuracy and surface quality.

[0003] The tooth processing of thin-walled rings is generally completed by milling in CNC machining centers, which has disadvantages such as high equipment cost, low processing efficiency, and low material utilization rate. In addition, the metal streamlines of the teeth of thin-walled rings are cut off, which can easily cause the product to be scrapped due to insufficient strength and toughness of the teeth, seriously affecting the appearance and performance of the product.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a thin-walled ring spring normal pressure finishing die is provided. Utility Model Content

[0005] The purpose of the utility model is to provide a thin-walled ring spring normal pressure finishing die to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thin-walled ring spring normal pressure finishing die, comprising a finishing upper die and a pressure edge assembly, an upper die retaining sleeve is arranged on the outer side of the upper end of the finishing upper die, the pressure edge assembly is arranged at the lower part of the upper die retaining sleeve, the pressure edge assembly comprises a compression spring, a pressure edge upper die and an upper die large sleeve, the bottom of the upper die retaining sleeve is connected to the compression spring, and the bottom of the compression spring is connected to the pressure edge upper die, the outer side of the pressure edge upper die is slidably connected to the upper die large sleeve, the bottom of the finishing upper die is provided with a forging blank, and the bottom of the forging blank is connected to the finishing lower die, and the bottom of the finishing lower die is provided with a first lower die large pad.

[0007] Furthermore, the number of the compression springs is set to six, and the compression springs are distributed equidistantly around the bottom of the upper mold retaining sleeve.

[0008] Furthermore, the edge pressing upper die is slidably connected to the finishing upper die, and the upper outer end of the edge pressing upper die is stepped.

[0009] Furthermore, the upper die large sleeve is fixedly connected to the upper die retaining sleeve, and both sides of the upper portion of the upper die retaining sleeve are stepped.

[0010] Furthermore, a second lower mold large pad is placed on the bottom of the first lower mold large pad, a third lower mold large pad is fixed on the bottom of the second lower mold large pad, and a demoulding assembly is connected to the bottom of the third lower mold large pad.

[0011] Furthermore, the demoulding assembly includes a lower push rod, an inner pad and a lower ejector rod, the top of the lower push rod is connected to the inner pad, and the top of the inner pad is provided with the lower ejector rod.

[0012] Furthermore, the inner pad is slidably connected to the large pad of the third lower mold, and the lower ejector rods are equidistantly distributed around the top of the inner pad.

[0013] Furthermore, there are three lower ejector rods, and the lower ejector rods are slidably connected to the finishing lower die.

[0014] The utility model provides a thin-walled ring spring normal pressure finishing die, which has the following beneficial effects:

[0015] 1. The utility model sets the edge pressing assembly and utilizes the characteristic that the compression spring on the edge pressing upper die can freely expand and contract under different forces, so that the edge pressing upper die is always in close contact with the upper end face of the forging, thereby solving the problems of convex thin wall and irregular deformation of the flange of the ring. At the same time, the ring finishing die has a reasonable structure, small forming tonnage, low equipment price, small end face tooth deformation, high tooth profile accuracy, low surface roughness, high dimensional accuracy, long die life and high production efficiency.

[0016] 2. The utility model is provided with a demoulding assembly. When the ejection mechanism under the external machine tool starts to work, the inner pad can be driven to move by the lower push rod, so that the lower push rod can eject the forging blank, which is convenient for manual removal. At the same time, the lower push rods are equidistantly distributed on the bottom of the forging blank, so that the force is evenly distributed during ejection, avoiding pressure concentration and damage to the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional cross-sectional structure of a thin-walled ring spring normal pressure finishing die of the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of a forging blank of a thin-walled ring spring normal pressure finishing die of the utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of a demoulding component of a thin-walled ring spring normal pressure finishing mold of the utility model.

[0020] In the figure: 1. Finishing upper die; 2. Upper die retaining sleeve; 3. Edge pressure assembly; 301. Compression spring; 302. Edge pressure upper die; 303. Upper die large sleeve; 4. Forging blank; 5. Finishing lower die; 6. First lower die large pad; 7. Second lower die large pad; 8. Third lower die large pad; 9. Demolding assembly; 901. Lower push rod; 902. Inner pad; 903. Lower ejector. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figure 1 and Figure 2 As shown, a thin-walled ring spring normal pressure finishing die includes a finishing upper die 1 and a pressure edge component 3, characterized in that an upper die holding sleeve 2 is arranged on the outer side of the upper end of the finishing upper die 1, and the pressure edge component 3 is arranged at the lower part of the upper die holding sleeve 2, and the pressure edge component 3 includes a compression spring 301, a pressure edge upper die 302 and an upper die large sleeve 303. The bottom of the upper die holding sleeve 2 is connected with a compression spring 301, and the bottom of the compression spring 301 is connected with the pressure edge upper die 302. There are six compression springs 301, and the compression springs 301 are equidistantly distributed around the bottom of the upper die holding sleeve 2. The compression springs 301 are used to freely expand and contract under different forces, so that the pressure edge upper die 3 02 is always in close contact with the upper end face of the workpiece, so that the problem of the raised thin wall of the ring and the irregular deformation of the flange can be solved. The edge pressing upper die 302 is slidably connected to the finishing upper die 1, and the upper outer end of the edge pressing upper die 302 is stepped. The edge pressing upper die 302 can press and position the edge of the forging blank 4. The outer side of the edge pressing upper die 302 is slidably connected with the upper die large sleeve 303, and the upper die large sleeve 303 is fixedly connected to the upper die retaining sleeve 2, and the upper two sides of the upper die retaining sleeve 2 are stepped. The upper die large sleeve 303 can limit the edge pressing upper die 302. The bottom of the finishing upper die 1 is provided with a forging blank 4, and the bottom of the forging blank 4 is connected to the finishing lower die 5. The bottom of the finishing lower die 5 is provided with a first lower die large pad 6.

[0023] like Figure 2 and Figure 3As shown, the bottom of the first lower die large pad 6 is provided with a second lower die large pad 7, and the bottom of the second lower die large pad 7 is fixed with a third lower die large pad 8, and the bottom of the third lower die large pad 8 is connected with a demoulding assembly 9, and the demoulding assembly 9 includes a lower push rod 901, an inner pad 902 and a lower ejector rod 903, the top of the lower push rod 901 is connected with the inner pad 902, and the top of the inner pad 902 is provided with a lower ejector rod 903, the inner pad 902 is slidably connected to the third lower die large pad 8, and the lower ejector rod 903 is equidistantly distributed about the top of the inner pad 902. During demoulding, the lower push rod 901 drives the inner pad 902 to move, so that the lower ejector rod 903 ejects the workpiece, which is convenient for manual removal. There are three lower ejector rods 903, and the lower ejector rod 903 is slidably connected to the finishing lower die 5, so that the force is uniform during ejection, thereby improving stability during demoulding.

[0024] In summary, when using the thin-walled ring spring normal pressure finishing die, first put the prefabricated forging blank 4 into the cavity of the finishing lower die 5, and the side surface of the tooth portion of the prefabricated forging blank 4 will be positioned with a small gap between the inner tooth portion cavity of the finishing lower die 5. Then, the finishing upper die 1 starts to move downward with the external press slider. At this time, the compression spring 301 will push the edge pressing upper die 302 under the limit of the upper die retaining sleeve 2, so that it is always close to the upper end face of the forging blank 4. Finally, when the press slider reaches the set position of the machine tool, it starts to move upward, and the lower ejection mechanism of the machine tool starts to work. The lower push rod 901 pushes the three lower ejector rods 903 evenly distributed on the inner pad 902 to eject the workpiece a certain distance, and the workpiece at the discharge port is manually taken out. At the same time, the finishing upper die 1 and the edge pressing upper die 302 return to their original positions with the press slider, and the entire mold returns to its initial state, waiting for the next work.

[0025] The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A thin-walled ring spring normal pressure finishing die, comprising a finishing upper die (1) and a pressure edge component (3), characterized in that: An upper die holding sleeve (2) is arranged on the outer side of the upper end of the finishing upper die (1), and the edge pressing assembly (3) is arranged at the lower part of the upper die holding sleeve (2). The edge pressing assembly (3) includes a compression spring (301), an edge pressing upper die (302) and an upper die large sleeve (303). The bottom of the upper die holding sleeve (2) is connected to the compression spring (301), and the bottom of the compression spring (301) is connected to the edge pressing upper die (302). The outer side of the edge pressing upper die (302) is slidably connected to the upper die large sleeve (303). The bottom of the finishing upper die (1) is provided with a forging blank (4), and the bottom of the forging blank (4) is connected to the finishing lower die (5). The bottom of the finishing lower die (5) is provided with a first lower die large pad (6).

2. A thin-walled ring spring normal pressure finishing die according to claim 1, characterized in that: The number of the compression springs (301) is six, and the compression springs (301) are distributed equidistantly around the bottom of the upper die retaining sleeve (2).

3. The thin-walled ring spring normal pressure finishing die according to claim 1, characterized in that: The edge pressing upper die (302) is slidably connected to the finishing upper die (1), and the upper outer end of the edge pressing upper die (302) is in a step shape.

4. The thin-walled ring spring normal pressure finishing die according to claim 1, characterized in that: The upper die large sleeve (303) is fixedly connected to the upper die retaining sleeve (2), and both sides of the upper portion of the upper die retaining sleeve (2) are in a step-like shape.

5. The thin-walled ring spring normal pressure finishing die according to claim 1, characterized in that: A second lower mold large pad (7) is placed at the bottom of the first lower mold large pad (6), a third lower mold large pad (8) is fixed to the bottom of the second lower mold large pad (7), and a demoulding component (9) is connected to the bottom of the third lower mold large pad (8).

6. A thin-walled ring spring normal pressure finishing die according to claim 5, characterized in that: The demoulding assembly (9) comprises a lower push rod (901), an inner pad (902) and a lower ejector rod (903); the top of the lower push rod (901) is connected to the inner pad (902), and the top of the inner pad (902) is provided with the lower ejector rod (903).

7. A thin-walled ring spring normal pressure finishing die according to claim 6, characterized in that: The inner pad (902) is slidably connected to the third lower die large pad (8), and the lower ejector rods (903) are equidistantly distributed around the top of the inner pad (902).

8. The thin-walled ring spring normal pressure finishing die according to claim 6, characterized in that: The number of the lower push rods (903) is three, and the lower push rods (903) are slidably connected to the finishing lower die (5).

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