Groove stamping mechanism and stamping die

Abstract

The utility model provides a groove stamping mechanism and a stamping die, the groove stamping mechanism comprises an upper die base and a lower die base, the upper die base is located above the lower die base, a shaping station is formed between the upper die base and the lower die base, the shaping station comprises a male die assembly and a female die assembly, the male die assembly comprises a base plate, the base plate is arranged on the lower die base, and the base plate is provided with an annular protrusion; the female die assembly comprises a punch and an ejector rod, the punch is arranged on the upper die base and provided with a forming groove, the forming groove is opposite to the annular protrusion, the size of the forming groove is matched with that of the annular protrusion, and the ejector rod is arranged in the forming groove and connected with the forming groove in a sliding mode. The ejector rod is arranged in the forming groove of the shaping station, when the punch and the base plate extrude each other, the material belt is sunken towards the interior of the forming groove, the ejector rod abuts against the material belt on the face, back to the annular protrusion, of the material belt, the impact force borne by the material belt can be buffered, the probability that the material belt is punched through by the annular protrusion is reduced, and the yield of the material belt punching forming groove is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor shell forming technical field, specifically, a kind of recess stamping mechanism and stamping die. BACKGROUND

[0002] Motor generally refers to electronic starter, also called starter. It rotates through the force of coil in magnetic field to drive starter rotor to rotate, and the small gear on the rotor drives the engine flywheel to rotate, thereby driving the crankshaft to rotate and starting the vehicle. The two component innovations of new low-cost spark plug and starter with porcelain base lay the technical foundation for the development of automobiles.

[0003] Motor shell is one of important components of motor. Please refer to Figure 1 , Figure 1 It is motor shell structure schematic diagram, motor shell 20 is in the form of cap, and its bottom wall is provided with a recess 21. Motor shell 20 is generally made by stamping forming process, i.e. material belt is passed through stamping die, material belt is fed to stamping die, and then successively passes through stretching station, punching station, positioning station, shaping station, edge cutting station and trimming station, and finally strip-shaped material belt is stamped into motor shell. However, since material belt is sheet-shaped and is metal material, the recess 21 is generally formed by extruding material belt by punch and die of stamping die when traditional stamping die is shaped. Limited by material strength of material belt, the instantaneous impact force of stamping die is too large, and material belt is easily pierced by punch when recess 21 is formed, so that the yield of motor shell 20 stamping forming is low. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of prior art, the application provides a recess stamping mechanism and stamping die.

[0005] The recess stamping mechanism disclosed by the application comprises an upper die seat and a lower die seat, the upper die seat is located above the lower die seat, a shaping station is formed between the upper die seat and the lower die seat, the shaping station comprises a punch assembly and a die assembly, the punch assembly comprises a backing plate, the backing plate is arranged on the lower die seat and has an annular protrusion, the die assembly comprises a punch and a ejector pin, the punch is arranged on the upper die seat and has a forming groove, the forming groove is arranged opposite to the annular protrusion, and the size of the forming groove is matched with that of the annular protrusion, and the ejector pin is arranged in the forming groove and is in sliding connection with the forming groove.

[0006] Preferably, the shaping station has at least two, and the at least two shaping stations are arranged in sequence along the feeding direction of the material belt. Along the feeding direction of the material belt, the radius of the annular protrusion of adjacent shaping stations gradually decreases.

[0007] Preferably, the shaping station has at least two, and the at least two shaping stations are arranged in sequence along the feeding direction of the material belt. Along the feeding direction of the material belt, the height of the annular protrusion of adjacent shaping stations gradually increases.

[0008] Preferably, the die assembly further includes an elastic element located in the forming groove, one end of which is connected to the ejector pin and the other end of which abuts against the punch.

[0009] Preferably, the side of the annular protrusion facing the upper mold base is an arc surface; a leveling station is also formed between the upper mold base and the lower mold base, and the shaping station and the leveling station are arranged sequentially along the material feeding direction of the strip.

[0010] Preferably, the shaping station also includes two limiting components, which are located on both sides of the pad and connected to the lower mold base.

[0011] Preferably, the limiting component includes a driving component and a push plate, the driving component is disposed on the lower mold base, and the push plate is drivenly connected to the driving component.

[0012] Preferably, the end of the push plate facing the pad is in contact with the peripheral wall of the pad.

[0013] According to another aspect of the present invention, this application also discloses a stamping die, which includes a groove stamping mechanism.

[0014] The beneficial effects of this application are as follows: by setting a push rod in the forming groove of the forming station, when the punch is pressed against the pad, the strip is recessed towards the forming groove. The push rod abuts against the strip on the side of the strip away from the annular protrusion, which can buffer the impact force on the strip, reduce the probability of the strip being punched through by the annular protrusion, and improve the yield of the strip stamping forming groove. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the motor housing structure;

[0017] Figure 2 This is a schematic diagram of the groove stamping mechanism in the embodiment;

[0018] Figure 3 This is one of the schematic diagrams of the leveling station structure in the embodiment;

[0019] Figure 4 This is the second schematic diagram of the leveling station structure in the embodiment;

[0020] Figure 5 This is a cross-sectional view of the groove stamping mechanism in the embodiment;

[0021] Figure 6 This is a schematic diagram of the process of forming the motor housing from the feed strip in the embodiment;

[0022] Figure 7This is a schematic diagram of the stamping die structure in the embodiment.

[0023] Figure label:

[0024] 100 - Stamping die; 10 - Groove stamping mechanism; 200 - Strip material; 20 - Motor housing; 21 - Groove;

[0025] 1-Upper mold base; 2-Lower mold base; 3-Shaping station; 4-Leveling station;

[0026] 31-Punch assembly; 32-Die assembly; 33-Limiting assembly;

[0027] 311 - Pad;

[0028] 321 - Punch; 322 - Push rod; 323 - Elastic element;

[0029] 331-Driver component; 332-Push plate;

[0030] 3111 - Ring-shaped protrusion;

[0031] 3211 - Forming groove. Detailed Implementation

[0032] The following drawings disclose several embodiments of this application. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this application. That is, in some embodiments of this application, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0033] It should be noted that all directional indications in the embodiments of this application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0034] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit this application. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0035] To further understand the content, features, and effects of this application, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0036] Example 1

[0037] Please see Figure 2 , Figure 2 This is a schematic diagram of the groove stamping mechanism. In this example, the groove stamping mechanism 10 includes an upper die base 1, a lower die base 2, and a shaping station 3. The upper die base 1 and the lower die base 2 are arranged opposite each other, and the upper die base 1 can move up and down relative to the lower die base 2. The strip passes through the space between the upper die base 1 and the lower die base 2. The shaping station 3 is formed between the upper die base 1 and the lower die base 2. The shaping station is used to shape the strip so that the strip forms a groove 21.

[0038] Please refer to the following: Figures 3-5 , Figure 3 This is one of the schematic diagrams of the leveling station structure. Figure 4 This is the second schematic diagram of the leveling station structure. Figure 5 This is a cross-sectional view of the groove stamping mechanism. The forming station 3 includes a punch assembly 31 and a die assembly 32. The punch assembly 31 includes a backing plate 311, which is located on the lower die base 2 and has an annular protrusion 3111. The die assembly 32 includes a punch 321 and an ejector pin 322. The punch 321 is located on the upper die base 1 and has a forming groove 3211. The forming groove 3211 is opposite to the annular protrusion 3111, and the dimensions of the forming groove 3211 and the annular protrusion 3111 are matched. The ejector pin 322 is located in the forming groove 3211 and is slidably connected to the forming groove 3211.

[0039] Specifically, the punch assembly 31 is disposed on the lower die base 2, the die assembly 32 is disposed on the upper die base 1 and moves with the upper die base 1, the annular protrusion 3111 is located at the center of the surface of the pad 311, and the annular protrusion 3111 rises towards the upper die base 1. In this example, the surface of the pad 311 is an annular inclined surface, the punch 321 is disposed opposite to the pad 311, and the forming groove 3211 is also disposed opposite to the annular protrusion 3111. The radius of the forming groove 3211 is larger than the radius of the annular protrusion 3111, and the difference between the radius of the forming groove 3211 and the radius of the annular protrusion 3111 is equal to the thickness of the strip. The ejector pin 322 is slidably disposed in the forming groove 3211.

[0040] In practical applications, the X direction is the feeding direction of the strip, and the Y direction is the direction of relative movement between the upper die holder 1 and the lower die holder 2. The strip is fed between the upper die holder 1 and the lower die holder 2 and passes through different processing stations of the stamping die 100 in sequence. When the strip passes through the groove stamping mechanism 10, the strip is located on the pad 311, the upper die holder 1 moves toward the lower die holder 2, and the punch 321 moves toward the pad 311. The annular protrusion 3111 of the pad 311 abuts against the bottom surface of the strip, and the annular protrusion 3111 squeezes the strip. As the material is fed into the forming groove 3211, the ejector rod 322 abuts against the top surface of the strip. As the strip is squeezed into the forming groove 3211, the ejector rod 322 gradually slides away from the lower mold base 2 under the action of the strip's thrust. After the upper mold base 1 moves to its maximum stroke towards the lower mold base 2, the groove 21 is formed on the strip. Then the upper mold base 1 moves away from the lower mold base 2, and the strip continues to move along the strip feeding direction. The ejector rod 322 slides along the forming groove 3211 under the action of gravity.

[0041] Thus, by setting a push rod 322 in the forming groove 3211 of the forming station 3, when the punch 321 is pressed against the pad 311, the strip is recessed into the forming groove 3211. The push rod 322 abuts against the strip on the side of the strip that is away from the annular protrusion 3111, which can buffer the impact force on the strip, reduce the probability of the strip being punched through by the annular protrusion 3111, and improve the yield of the strip stamping forming groove 21.

[0042] Furthermore, the shaping station 3 has at least two, and the at least two shaping stations 3 are arranged sequentially along the feeding direction of the material belt. Along the feeding direction of the material belt, the radius of the annular protrusion 3111 of the adjacent shaping station 3 gradually decreases.

[0043] In this example, there are five shaping stations 3, which are arranged sequentially along the feeding direction of the material belt. From the feeding direction of the material belt to the discharging direction of the material belt, the radius of the annular protrusion 3111 of the adjacent shaping station 3 gradually decreases, and correspondingly, the radius of the forming groove 3211 of the adjacent shaping station 3 gradually decreases.

[0044] In this way, by stamping the strip repeatedly in successive stamping, the drawback of insufficient flexibility of the metal strip is further overcome, and the groove 21 of the strip is locally stamped multiple times, which further avoids stress concentration in the strip.

[0045] Furthermore, the shaping station 3 has at least two, and the at least two shaping stations 3 are arranged sequentially along the feeding direction of the material belt. Along the feeding direction of the material belt, the height of the annular protrusion 3111 of the adjacent shaping station 3 gradually increases.

[0046] Please refer to the following: Figure 6 , Figure 6 This is a schematic diagram of the process of forming a motor housing from a strip. In this example, there are five forming stations 3 from the strip feeding direction to the strip discharging direction. The radius of the annular protrusion 3111 of the adjacent forming stations 3 gradually decreases, and the height of the annular protrusion 3111 gradually increases. When the strip passes the fifth forming station 3 in the strip feeding direction, the strip completes the final stamping of the groove 21. That is, the groove 21 is stamped on the strip through five forming processes. Each time the strip passes through a forming station 3, the depth of the formed groove 21 is greater and the size is smaller.

[0047] In this way, by stamping the strip repeatedly in successive stamping, the drawback of insufficient flexibility of the metal strip is further overcome, and the groove 21 of the strip is locally stamped multiple times, which further avoids stress concentration in the strip.

[0048] Furthermore, the die assembly 32 also includes an elastic element 323, which is located in the forming groove 3211, with one end abutting against the ejector pin 322 and the other end abutting against the punch 321.

[0049] Specifically, the elastic element 323 can be a spring. The elastic element 323 is located in the forming groove 3211. One end of the elastic element 323 abuts against the bottom of the forming groove 3211, and the other end is connected to the ejector rod 322. When the punch 321 moves with the upper mold base 1 toward the direction closer to the lower mold base 2, the ejector rod 322 slides along the forming groove 3211 and the elastic element 323 is squeezed. When the upper mold base 1 moves away from the lower mold base 2, the elastic element 323 undergoes elastic deformation, pushing the ejector rod 322 to slide along the slide groove toward the lower mold base 2.

[0050] This can speed up the reset of the push rod 322 and improve the stamping efficiency of the groove stamping mechanism 10.

[0051] Please refer to the following: Figure 7 , Figure 7 for Figure 7 The diagram shows the structure of the stamping die. Further, the side of the annular protrusion 3111 facing the upper die holder 1 is an arc surface; a leveling station 4 is also formed between the upper die holder 1 and the lower die holder 2, and the shaping station 3 and the leveling station 4 are arranged sequentially along the material feeding direction.

[0052] Specifically, the side of the annular protrusion 3111 facing the upper mold base 1 is an arc surface, and the arc surface bulges towards the upper mold base 1.

[0053] This can further reduce the probability of the strip being punched through by the annular protrusion 3111 and improve the yield of the strip stamping forming groove 21.

[0054] Furthermore, a leveling station 4 is formed between the upper mold base 1 and the lower mold base 2, and the shaping station 3 and the leveling station 4 are arranged sequentially along the material feeding direction of the strip.

[0055] Specifically, the leveling station 4 also includes a punch assembly 31 and a die assembly 32. The punch assembly 31 includes a backing plate 311, which is located on the lower die base 2 and has an annular protrusion 3111. The die assembly 32 includes a punch 321 and an ejector pin 322. The punch 321 is located on the upper die base 1 and has a forming groove 3211. The forming groove 3211 is opposite to the annular protrusion 3111, and the dimensions of the forming groove 3211 and the annular protrusion 3111 are matched. The ejector pin 322 is located in the forming groove 3211 and is slidably connected to the forming groove 3211. Unlike the shaping station 3, the side of the annular protrusion 3111 facing the upper die is a plane.

[0056] Furthermore, the shaping station 3 also includes two limiting components 33, which are located on both sides of the pad 311 and are connected to the lower mold base 2.

[0057] Thus, after the material strip moves to the forming station 3 along the material strip feeding direction, the two limiting components 33 limit the material strip on both sides to prevent the material strip from moving during the stamping of the groove 21. The limiting components 33 play the role of positioning and limiting the material strip.

[0058] Furthermore, the limiting component 33 includes a driving member 331 and a push plate 332. The driving member 331 is disposed on the lower mold base 2, and the push plate 332 is drivenly connected to the driving member 331.

[0059] Specifically, the driving component 331 is driven by a cylinder. The driving component 331 is located on the lower mold base 2, and the push plate 332 is located on the lower mold base 2. The push plate 332 is located between the driving component 331 and the pad 311. One end of the push plate 332 is driven to connect with the driving component 331. The driving component 331 drives the push plate 332 to move towards the pad 311, or the driving component 331 drives the push plate 332 to move away from the pad 311.

[0060] Furthermore, the end of the push plate 332 facing the pad 311 is in contact with the peripheral wall of the pad 311.

[0061] In this example, the pad 311 has a circular cross-section, and correspondingly, the end of the push plate 332 facing the pad 311 has an arc-shaped cross-section.

[0062] This prevents the material strip from deforming due to the pressure of the push plate 332.

[0063] Example 2

[0064] Please review Figure 7 In this example, the stamping die 100 includes a groove stamping mechanism 10.

[0065] In summary, by installing a push rod in the forming groove of the forming station, when the punch and the pad are pressed together, the strip is recessed into the forming groove. The push rod abuts against the strip on the side of the strip away from the annular protrusion, which can buffer the impact force on the strip, reduce the probability of the strip being punched through by the annular protrusion, and improve the yield of the strip stamping forming groove.

[0066] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A groove stamping mechanism, characterized in that, include: The upper mold base (1) and the lower mold base (2) are provided. The upper mold base (1) is located above the lower mold base (2). A forming station (3) is formed between the upper mold base (1) and the lower mold base (2). The forming station (3) includes a punch assembly (31) and a die assembly (32). The punch assembly (31) includes a backing plate (311). The backing plate (311) is provided on the lower mold base (2) and has an annular protrusion (3111). The die assembly (311) includes a backing plate (311) and a die assembly (32). 2) Includes a punch (321) and a push rod (322). The punch (321) is located on the upper die base (1) and has a forming groove (3211). The forming groove (3211) is opposite to the annular protrusion (3111), and the forming groove (3211) and the annular protrusion (3111) are matched in size. The push rod (322) is located in the forming groove (3211) and is slidably connected to the forming groove (3211). The shaping station (3) has at least two, and the at least two shaping stations (3) are arranged sequentially along the feeding direction of the material belt. Along the feeding direction of the material belt, the radius of the annular protrusion (3111) of the adjacent shaping station (3) gradually decreases.

2. The groove stamping mechanism according to claim 1, characterized in that, Along the feeding direction of the material belt, the height of the annular protrusion (3111) of the adjacent shaping station (3) gradually increases.

3. The groove stamping mechanism according to any one of claims 1-2, characterized in that, The die assembly (32) also includes an elastic element (323), which is located in the forming groove (3211), with one end connected to the push rod (322) and the other end abutting against the punch (321).

4. The groove stamping mechanism according to any one of claims 1-2, characterized in that, The side of the annular protrusion (3111) facing the upper mold base (1) is an arc surface; a leveling station (4) is also formed between the upper mold base (1) and the lower mold base (2), and the shaping station (3) and the leveling station (4) are arranged sequentially along the material feeding direction.

5. The groove stamping mechanism according to claim 1, characterized in that, The shaping station (3) also includes two limiting components (33), which are located on both sides of the pad (311) and are connected to the lower mold base (2).

6. The groove stamping mechanism according to claim 5, characterized in that, The limiting component (33) includes a driving component (331) and a push plate (332). The driving component (331) is disposed on the lower mold base (2), and the push plate (332) is drivenly connected to the driving component (331).

7. The groove stamping mechanism according to claim 6, characterized in that, The end of the push plate (332) facing the pad (311) is in contact with the peripheral wall of the pad (311).

8. A stamping die, characterized in that, Includes the groove stamping mechanism (10) as described in any one of claims 1-7.

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