A stamping die structure

Abstract

The embodiment of the application provides a stamping die structure, relates to the technical field of a die, and comprises an upper die, a lower die and a mounting seat. The lower die is rotationally connected with the mounting seat through a rotating shaft, a plurality of forming grooves are arranged on the lower die and are uniformly distributed in the circumferential direction of the rotating shaft, and the mounting seat is provided with a stepping motor for driving the lower die to rotate. The mounting seat is provided with an adjusting device, which comprises an adjusting rod, a driving mechanism slidingly arranged on the upper die, a first driving rod, a second driving rod arranged on the lower die, a third driving rod arranged on the mounting seat and a return spring. When the upper die descends, the first driving rod drives the second driving rod and the third driving rod in sequence, so that the adjusting rod is inserted into a corresponding forming groove and rises to a predetermined height to limit the forming depth. The application realizes accurate adjustment of the forming depth, has a compact structure and is high in automation degree.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a stamping die structure. Background Technology

[0002] In the field of stamping, traditional molds usually have two major technical problems for parts that require multiple stampings or have varying forming depths: first, the parts are easily stuck in the mold cavity after forming and are difficult to remove, affecting production efficiency; second, it is difficult to adjust the forming depth, often requiring machine shutdown to replace the mold or manually adjust the bottom mold height.

[0003] While existing technologies include rotary lower die structures that achieve automatic unloading through rotation, their depth adjustment mechanisms are mostly independently set. Some solutions use an independent cylinder or motor-driven adjustment rod installed on a fixed part, but these solutions have the following drawbacks: First, they require an additional power source and control unit, increasing cost and system complexity; second, they are difficult to precisely coordinate with the stamping action of the upper die; and third, the adjustment stroke is usually a fixed value, making it impossible to flexibly adjust the forming depth according to process requirements.

[0004] Therefore, it is necessary to develop a rotary stamping die structure that can work in conjunction with the upper die stamping action and achieve precise depth adjustment. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this application provides a stamping die structure.

[0006] The stamping die structure provided in this application adopts the following technical solution: A stamping die structure includes an upper die, a lower die, and a mounting base for mounting the lower die. A stamping head is mounted on the upper die. The lower die is rotatably connected to the mounting base via a rotating shaft. The lower die has several forming grooves for forming parts, and these grooves are evenly distributed circumferentially around the rotating shaft. A stamping head is mounted on the upper die opposite to one of the forming grooves. A motor is mounted on the mounting base to drive the lower die to rotate. An adjustment device is mounted on the mounting base corresponding to each forming groove and used to adjust the effective forming depth of the forming groove, so that after the part is formed in the forming groove, it falls out from the bottom through the rotation of the lower die.

[0007] Furthermore, the adjusting device includes an adjusting rod disposed at the bottom of the mounting base. The adjusting rod reciprocates vertically, and its upper end can extend into or retract from the bottom of the corresponding forming groove to change the effective forming depth of the forming groove. A driving mechanism is slidably disposed on the upper mold. The adjusting device also includes a first driving rod disposed on the driving mechanism, a second driving rod cooperating with the first driving rod on the lower mold, and a third driving rod cooperating with the second driving rod on the mounting base. During the downward movement of the upper mold, the first driving rod sequentially acts on the second and third driving rods, causing the third driving rod to push the adjusting rod into the corresponding forming groove and rise to a predetermined height, thereby limiting the forming depth of the forming groove. A return spring is disposed within the mounting base for pulling the corresponding second and third driving rods back to their original positions.

[0008] Furthermore, the driving mechanism includes a fixed base fixed to the machine body, a sliding seat slidably disposed on the fixed base, the upper mold slidably disposed on the other side of the fixed base, and a servo cylinder fixed on the fixed base to drive the sliding seat and the upper mold to move up and down respectively, and the first driving rod is connected to the sliding seat.

[0009] Furthermore, the upper end of the second drive rod is provided with a positioning groove for cooperating with the first drive rod, so as to define the relative position of the first drive rod and the second drive rod.

[0010] According to the stamping die structure of the claim, the motor is a stepper motor, which is connected to the rotating shaft through a coupling or gear mechanism to drive the lower die to rotate intermittently at a preset angle, so that each of the forming grooves is aligned with the stamping head in sequence.

[0011] Furthermore, the reset spring includes a first reset spring and a second reset spring. One end of the first reset spring and the second reset spring are fixedly connected to the mounting base, and the other end is connected to the corresponding second drive rod and the third drive rod, so as to pull the second drive rod and the third drive rod back to the initial position when the upper mold moves upward, and drive the adjusting rod to exit the molding groove.

[0012] Furthermore, a transmission block is slidably disposed within the mounting base. The upper surface of the transmission block is not higher than the upper surface of the mounting base. The lower end of the second drive rod acts on the transmission block and, through the transmission block, acts on the third drive rod to drive the adjusting rod to move upward.

[0013] Furthermore, a pusher block is connected to the upper mold, and a pusher rod is installed on the pusher block to push the formed part away from the forming groove.

[0014] In summary, this application includes at least one of the following beneficial technical effects: Active precision adjustment: By setting a sliding seat driven by a servo cylinder, the extension of the first drive rod and the downward movement of the upper mold can be controlled synchronously or independently. The servo cylinder can precisely control the rising height of the adjustment rod according to process requirements, thereby realizing digital and real-time adjustment of the forming depth to adapt to the processing needs of parts of different specifications.

[0015] Reliable linkage: The upper end of the second drive rod is equipped with a positioning groove. When the upper mold moves downward, the first drive rod can be accurately inserted into the positioning groove, ensuring that the power transmission remains stable and reliable even when operating at high speed or with slight positional deviation.

[0016] Separable transmission design: The first drive rod and the second drive rod adopt a separable connection method, which allows the upper mold and the lower mold to be completely separated when not in operation, without affecting the free rotation of the lower mold, thus solving the motion interference problem between the rotating mold and the fixed drive source.

[0017] High degree of automation: Combined with a stepper motor-driven rotating lower die, the entire process of "stamping-depth adjustment-rotation unloading" is fully automated, which greatly improves production efficiency and product consistency.

[0018] Reliable reset: Independent reset springs ensure that each drive rod can accurately reset after stamping, preparing it for the next cycle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of the adjustment device used in this application.

[0021] Figure 3 This is a schematic diagram of the adjusting device in Embodiment 2 of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Upper die; 11. Punch head; 2. Lower die; 21. Rotating shaft; 22. Forming groove; 3. Mounting base; 4. Adjusting rod; 5. Drive mechanism; 51. Fixed base; 52. Sliding base; 53. Servo cylinder; 6. First drive rod; 7. Second drive rod; 71. Positioning groove; 72. First inclined surface; 8. Third drive rod; 81. Second inclined surface; 82. Third inclined surface; 91. First return spring; 92. Second return spring; 100. Transmission block; 101. Fourth inclined surface; 102. Pushing block; 103. Pushing rod. Detailed Implementation

[0023] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0024] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0025] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail. Example

[0026] This application discloses a stamping die structure, referring to... Figure 1 and Figure 2 The system includes an upper die 1, a lower die 2, and a mounting base 3. The lower die 2 is cylindrical and rotatably connected to a bearing seat on the mounting base 3 via a rotating shaft 21. Multiple forming grooves 22 are formed on the circumferential surface of the lower die 2, evenly distributed around the central axis of the rotating shaft 21. A stepper motor (not shown in the figure) is fixedly mounted on the mounting base 3. The output shaft of the stepper motor is connected to the rotating shaft 21 via a coupling or gear mechanism to drive the lower die 2 to rotate precisely by a specified angle each time, thus achieving station switching. A punch head 11 is fixedly mounted on the upper die 1, and the position of the punch head 11 is directly opposite the forming groove 22 at the uppermost punching station.

[0027] Reference Figure 1 and Figure 2The mounting base 3 is equipped with an adjustment device corresponding to each molding groove 22 and used to adjust the effective molding depth of the molding groove 22. The adjustment device includes adjustment rods 4, which are vertically slidably disposed at the bottom of the mounting base 3, with each adjustment rod 4 directly below a molding groove 22. Rollers may be provided at the bottom of the adjustment rods 4. The upper mold 1 is equipped with a drive mechanism 5, which is fixedly installed on the side of the upper mold 1.

[0028] Reference Figure 1 and Figure 2 The drive mechanism 5 includes a fixed base 51, a sliding base 52, and servo cylinders 53. The upper die 1 is slidably connected to the fixed base 51 via a guide rail, and the sliding base 52 is slidably connected to the other side of the fixed base 51 via a guide rail. The fixed base 51 is fixed to the machine body. Two servo cylinders 53 drive the fixed base 51 and the upper die 1 to move up and down respectively. The cylinder body of the servo cylinder 53 is fixed on the fixed base 51, and its piston rod is connected to the corresponding upper die 1 and sliding base 52. The servo cylinder 53 is controlled by an external controller (such as a PLC) and can precisely control the extension length of the piston rod and the descent height of the stamping head 11.

[0029] Reference Figure 1 and Figure 2 The adjusting device also includes a first drive rod 6, a vertical rod whose top end is fixedly connected to the bottom of the sliding seat 52; and a second drive rod 7, which is vertically slidably mounted on the lower mold 2. Specifically, a vertical guide hole is provided at the center or side of the rotating shaft 21 of the lower mold 2, and the second drive rod 7 passes through the guide hole, achieving circumferential fixation (i.e., rotating with the lower mold 2) and axial sliding through a key or spline structure. A flared positioning groove 71 is provided at the upper end of the second drive rod 7, which guides the first drive rod 6 to be smoothly inserted during docking. A first inclined surface 72 is provided at the lower end of the second drive rod 7, and a third drive rod 8 is also included, which is horizontally slidably mounted in the mounting seat 3. One end of the third drive rod 8 is provided with a second inclined surface 81 that slides in cooperation with the first inclined surface 72. The other end of the third drive rod 8 is provided with a third inclined surface 82, which slides in cooperation with the roller or inclined surface at the bottom of the adjusting rod 4. The adjusting device also includes a return spring, including a first return spring 91 and a second return spring 92. The first return spring 91 is disposed within the mounting base 3, and its lower end is connected to the second drive rod 7, for driving the second drive rod 7 to return upward. The second return spring 92 is disposed within the mounting base 3 and is connected to the third drive rod 8, for driving the third drive rod 8 to return horizontally.

[0030] Working principle: Initial state: Upper mold 1 is in the raised position. Servo cylinder 53 is in the retracted state, and the first drive rod 6 and the second drive rod 7 are separated. Under the action of the first return spring 91, the second drive rod 7 is in the highest position. Under the action of the second return spring 92, the third drive rod 8 is in the initial position. At this time, the lowest point of the third inclined surface 82 is in contact with the bottom of the adjusting rod 4 or the bottom roller. The adjusting rod 4 is in the lowest position, and its top is not higher than the bottom surface of the lower mold 2, so it does not affect the rotation of the lower mold 2.

[0031] Docking Phase: The upper mold 1 begins to descend under the drive of an external press. When the upper mold 1 approaches the lower mold 2, the control system issues a command, the servo cylinder 53 is activated, and the sliding seat 52 extends downward. The first drive rod 6 then descends, its lower end inserting into the positioning groove 71 at the upper end of the second drive rod 7. Because the positioning groove 71 is flared, accurate insertion can be ensured even with slight positional deviations.

[0032] Drive and Adjustment Stage: The upper mold 1 continues to descend. At this time, the first drive rod 6 has been inserted into the positioning groove 71. As the upper mold 1 descends, the first drive rod 6 pushes the second drive rod 7 downward through the positioning groove 71, overcoming the elastic force of the first return spring 91. When the second drive rod 7 slides downward, its lower end's first inclined surface 72 slides relative to the second inclined surface 81 of the third drive rod 8, converting the vertical downward movement of the second drive rod 7 into the horizontal movement of the third drive rod 8. The third drive rod 8 overcomes the elastic force of the second return spring 92 and slides to one side. When the third drive rod 8 slides, its third inclined surface 82 moves accordingly. Due to the effect of the inclined surface, the height of the inclined surface at the contact point with the bottom of the adjusting rod 4 gradually increases, thereby lifting the adjusting rod 4 upward. The adjusting rod 4 is inserted upward into the forming groove 22, which is currently in the stamping station. Its rising height is determined by the extension length of the servo cylinder 53. By controlling the extension of the servo cylinder 53, the position of the top of the adjusting rod 4 in the forming groove 22 can be precisely controlled, thereby determining the forming depth of the part. After the adjustment is in place, another servo cylinder 53 controls the upper mold 1 to move downward, and the stamping head 11 stamps the blank located in the forming groove 22. The blank is squeezed and formed between the side wall of the forming groove 22 and the top of the adjusting rod 4.

[0033] Reset Phase: After stamping, the upper die 1 rises. First, the servo cylinder 53 retracts, causing the first drive rod 6 to move upward and exit from the positioning groove 71. Under the action of the first reset spring 91, the second drive rod 7 slides upward to reset. When the second drive rod 7 slides upward, the thrust of its first inclined surface 72 on the third drive rod 8 disappears, and under the action of the second reset spring 92, the third drive rod 8 slides in the opposite direction to reset. When the third drive rod 8 resets, the low point of the third inclined surface 82 realigns with the adjusting rod 4, and the adjusting rod 4 falls back to reset under its own gravity, exiting the forming groove 22.

[0034] Rotary unloading: After all moving parts have reset, the stepper motor starts, driving the lower mold 2 to rotate precisely 90 degrees. The forming slot 22 carrying the molded parts rotates to the unloading station (directly below), and the parts fall into the collection box below by gravity. At the same time, a new empty forming slot 22 rotates to the stamping station, ready for the next cycle. Through the precise control of the servo cylinder 53, this mold can adjust the forming depth of different batches of parts at any time without stopping the machine, greatly improving the flexibility and automation level of production. Example

[0035] Reference Figure 3 A transmission block 100 is slidably disposed inside the mounting base 3. The upper surface of the transmission block 100 is not higher than the upper surface of the mounting base 3. A fourth inclined surface 101 is provided on the transmission block 100 to cooperate with the second inclined surface 81. The lower end of the second drive rod 7 acts on the transmission block 100 and acts on the third drive rod 8 through the transmission block 100, thereby reducing the stroke of the second drive rod 7.

[0036] Reference Figure 1 An upper die 1 is connected to a pusher block 102, and a pusher rod 103 is installed on the pusher block (102) to push the formed part away from the forming groove 22. During the downward movement of the upper die 1, the stamping head 11 is used for forming the part, and the pusher rod 103 is used to push the stamped part downward to prevent the part from getting stuck in the forming groove 22. The pusher rod 103 is a telescopic rod with a spring inside. Lubricating oil is injected into the cavity, and there are openings on the surface. During the process of pushing the part down, the lubricating oil lubricates the forming groove 22. The forming groove 22 only needs to be lubricated in time when the part gets stuck. According to the actual production needs, the forming groove 22 can be set in the tube, and the tube can be detachably installed in the lower die 2. The part is formed in the tube, which is convenient for tube replacement and can also meet the needs of different models.

[0037] The above are merely preferred embodiments of this application. The scope of protection of this application is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in this application should be included within the scope of protection recorded in the claims.

Claims

1. A punch die structure characterized by, The assembly includes an upper die (1), a lower die (2), and a mounting base (3) for mounting the lower die (2). A punch head (11) is mounted on the upper die (1). The lower die (2) is rotatably connected to the mounting base (3) via a rotating shaft (21). The lower die (2) has several forming grooves (22) for forming parts, and the forming grooves (22) are evenly distributed around the rotating shaft (21). A punch head (11) is mounted on the upper die (1) and is positioned opposite to one of the forming grooves (22). A motor is mounted on the mounting base (3) to drive the lower die (2) to rotate. An adjustment device is mounted on the mounting base (3) to adjust the effective forming depth of each forming groove (22), so that after the part is formed in the forming groove (22), it falls out from the bottom through the rotation of the lower die (2).

2. The stamping die structure according to claim 1, characterized by The adjustment device includes an adjustment rod (4) disposed at the bottom of the mounting base (3). The adjustment rod (4) can reciprocate in the vertical direction, and its upper end can extend into or out of the bottom of the corresponding forming groove (22) to change the effective forming depth of the forming groove (22). A driving mechanism (5) is slidably disposed on the upper mold (1). The adjustment device also includes a first driving rod (6) disposed on the driving mechanism (5). A second driving rod (7) cooperating with the first driving rod (6) is disposed on the lower mold (2). A second driving rod (7) cooperating with the first driving rod (6) is disposed on the mounting base (3). The second drive rod (7) cooperates with the third drive rod (8); when the upper mold (1) moves downward, the first drive rod (6) acts on the second drive rod (7) and the third drive rod (8) in sequence, so that the third drive rod (8) pushes the adjusting rod (4) to insert into the corresponding molding groove (22) and rise to a predetermined height, so as to limit the molding depth of the molding groove (22); the mounting base (3) is provided with a return spring (91, 92) for pulling the corresponding second drive rod (7) and the third drive rod (8) to reset.

3. The stamping die structure according to claim 2, characterized in that, The drive mechanism (5) includes a fixed seat (51) fixed to the body, a sliding seat (52) is slidably disposed on the fixed seat (51), the upper mold (1) is slidably disposed on the other side of the fixed seat (51), and a servo cylinder (53) is fixed on the fixed seat (51) to drive the sliding seat (52) and the upper mold (1) to move up and down respectively. The first drive rod (6) is connected to the sliding seat (52).

4. The stamping die structure according to claim 3, characterized in that, The upper end of the second drive rod (7) is provided with a positioning groove (71) for cooperating with the first drive rod (6) to limit the relative position of the first drive rod (6) and the second drive rod (7).

5. The stamping die structure according to claim 4, characterized in that, The motor is a stepper motor, which is connected to the rotating shaft (21) through a coupling or gear mechanism to drive the lower die (2) to rotate intermittently at a preset angle, so that each of the forming grooves (22) is aligned with the stamping head (11) in sequence.

6. The stamping die structure according to claim 5, characterized in that, The reset spring includes a first reset spring (91) and a second reset spring (92). One end of the first reset spring (91) and the second reset spring (92) are fixedly connected to the mounting base (3), and the other end is connected to the corresponding second drive rod (7) and the third drive rod (8) so that when the upper mold (1) moves upward, the second drive rod (7) and the third drive rod (8) are pulled back to their initial positions, and the adjusting rod (4) is driven to exit the molding groove (22).

7. The stamping die structure according to claim 6, characterized in that, A transmission block (100) is slidably disposed inside the mounting base (3). The upper surface of the transmission block (100) is not higher than the upper surface of the mounting base (3). The lower end of the second drive rod (7) acts on the transmission block (100) and acts on the third drive rod (8) through the transmission block (100) to drive the adjusting rod (4) to move upward.

8. The stamping die structure according to claim 7, characterized in that, The upper mold (1) is connected to a pusher block (102), and the pusher block (102) is equipped with a pusher rod (103) to push the formed part away from the forming groove (22).

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