Progressive die quick change device

Abstract

The utility model relates to the technical field of progressive die equipment, and disclose a kind of progressive die quick-change equipment, including lower die holder, lower backing plate, die holder fixed plate, fixed ring body and rotor slot die, the die holder fixed plate is installed in lower die holder top, the fixed ring body upper portion is provided with cavity hole, the fixed ring body is detachably embedded in the cavity hole of die holder fixed plate, the rotor slot die is interference fit in the inner hole of fixed ring body, the lower die holder is equipped with ejector mechanism, the ejector mechanism acts on the bottom of fixed ring body, for providing smooth ejecting force when replacing mould, the fixed ring body is ejected from the cavity hole of die holder fixed plate as a whole.This progressive die quick-change equipment, set up hydraulic or spiral ejector mechanism in lower die holder, when replacing mould, it can provide smooth, uniform and vertically upward ejecting force, directly act on the bottom of fixed ring body, so that the various disadvantages brought by relying on artificial knocking mode to take out fixed ring body in background technology are completely eliminated.

Description

Technical Field

[0001] This utility model relates to the field of progressive die equipment technology, specifically a progressive die quick-change device. Background Technology

[0002] In the production of motor rotor laminations, to meet market demand and reduce costs, it is often necessary to stamp two or more products with different slot shapes on a single progressive die. Traditional solutions mainly involve lengthening the die to increase the number of workstations, or directly replacing the punch and die at the existing workstation. However, increasing the number of workstations is limited by the size of the press table and may cause the pressure center to deviate, affecting stamping stability. When replacing the die at the existing workstation, the entire die fixing plate must first be removed from the die, and then the die must be removed from the fixing plate by hammering. This process is not only labor-intensive and inefficient, but also a bottleneck in the entire production process.

[0003] The aforementioned traditional mold-changing method has significant drawbacks. The problem lies in its over-reliance on the operator's personal skills and experience when changing the die. Because a round bar must be used to apply impact force through the "knocking hole" to remove the retaining ring and die, the force, direction, and position of the knocking are difficult to control precisely. Uneven force or inaccurate positioning can easily cause the retaining ring to jam, further increasing the difficulty of removal. More importantly, the huge impact force will directly act on the precision mating surface between the retaining ring and the die fixing plate. Long-term repeated knocking operations will inevitably cause wear or even damage to this mating surface.

[0004] The accumulation of such wear and damage will gradually reduce the positioning accuracy of the die fixing plate and the rigidity of the overall mold, ultimately affecting the stability of mold production and the dimensional consistency of stamped products.

[0005] Therefore, we propose a progressive die quick-change device to solve the problems mentioned above. Utility Model Content

[0006] This utility model provides a progressive die quick-change device, which can solve the problem in the prior art that when changing the die at the original station, the entire die fixing plate must first be removed from the die, and then the die must be removed from the fixing plate by knocking. This relies on the operator's skills and experience. Since a round bar must be used to apply impact force through the "knocking hole" to remove the fixing ring and die, it is difficult to accurately control the force, direction and position of the knocking. Uneven force or inaccurate position can easily cause the fixing ring to jam, which will increase the difficulty of removal.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A progressive die quick-change device includes a lower die base, a lower backing plate, a die fixing plate, a fixed ring body, and a rotor slotted die. The die fixing plate is installed above the lower die base. The upper part of the fixed ring body is provided with a cavity hole. The fixed ring body is detachably embedded in the cavity hole of the die fixing plate. The rotor slotted die is interference-fitted into the inner hole of the fixed ring body. The device is characterized in that: the lower die base is provided with an ejection mechanism. The ejection mechanism acts on the bottom of the fixed ring body to provide a stable ejection force when changing the die, and ejects the entire fixed ring body from the cavity hole of the die fixing plate.

[0008] Preferably, the ejection mechanism is a hydraulic ejection mechanism, which includes at least one hydraulic cylinder chamber opened in the lower mold base, a piston is provided in the hydraulic cylinder chamber, and an oil passage for oil supply is fixedly connected to the outer side of the hydraulic cylinder chamber.

[0009] Preferably, the top of the piston contacts the bottom of the fixed ring body, and the oil passage leads to the outside of the lower mold base and is connected to a quick connector.

[0010] Preferably, the ejection mechanism is a spiral ejection mechanism, including at least two threaded holes symmetrically opened at the bottom of the fixed ring body, and a matching ejection bolt; the lower pad and the lower mold base are provided with through holes at positions corresponding to the threaded holes, the ejection bolt passes through the through holes and is screwed into the threaded hole of the fixed ring body, and the fixed ring body is lifted by rotating the ejection bolt.

[0011] Preferably, a linkage gear is fixedly connected to the end of the ejector bolt away from the fixed ring body, and a gear ring that rotatably engages with the linkage gear is provided inside the lower mold base. The inner side of the gear ring meshes with the linkage gear, and a drive component that drives the gear ring to rotate is installed inside the lower mold base.

[0012] Preferably, the driving components are a servo motor and a drive gear. The servo motor is fixedly installed inside the lower mold base, and the drive gear of the servo motor meshes with the inner side of the gear ring.

[0013] Preferably, the side wall of the fixed ring body is provided with a fixed ring ejection screw hole, which is used to screw in a screw after the ejection mechanism has ejected the fixed ring body for a certain distance to provide auxiliary pulling force or as a manual backup solution.

[0014] Preferably, the lower mold base is provided with a fastening screw, which passes through the bottom of the lower mold base and is threadedly connected to the fixing ring body for fixation.

[0015] Preferably, the fixing ring body and the cavity hole of the die fixing plate adopt a transition fit, and the outer edge of the fixing ring body near the cavity hole of the die fixing plate is provided with a chamfer.

[0016] Preferably, the outer wall of the fixed ring body is provided with a fixed ring anti-rotation pin, and the inner wall of the cavity hole of the die fixing plate is provided with a corresponding pin hole; the outer wall of the rotor groove die is provided with a groove die anti-rotation pin, and the inner wall of the fixed ring body is provided with a corresponding pin hole.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are: This invention's equipment, by incorporating a hydraulic or spiral ejection mechanism within the lower mold base, provides a stable, uniform, and vertically upward ejection force during mold replacement. This force acts directly on the bottom of the fixed ring, completely eliminating the drawbacks of manual hammering used in previous technologies. It not only completely avoids reliance on operator skill and experience, preventing the fixed ring from jamming due to uneven hammering force or inaccurate positioning, but more importantly, it effectively protects the precision mating surfaces between the fixed ring and the die fixing plate, preventing wear or damage caused by long-term hammering. This ensures the high positional accuracy of the die fixing plate and the production stability of the mold over the long term. Furthermore, the equipment achieves reliable locking through fastening screws, ensures circumferential positioning through anti-rotation pins, provides auxiliary protection through ejector screw holes, and facilitates guided installation through a chamfered design. This makes the entire replacement operation safer, more labor-saving, more efficient, and more reliable, significantly improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model; Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present invention; Figure 3 This is a cross-sectional structural diagram of Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the unfolded structure of Embodiment 2 of this utility model.

[0019] The components are: 1. Lower mold base; 2. Lower backing plate; 3. Die fixing plate; 4. Fixing ring body; 5. Rotor groove die; 6. Hydraulic cylinder chamber; 7. Piston; 8. Oil passage; 10. Ejector bolt; 11. Linkage gear; 12. Gear ring; 14. Servo motor; 15. Drive gear; 16. Fixing ring ejector screw hole; 17. Fastening screw; 18. Fixing ring anti-rotation pin; 19. Groove die anti-rotation pin. Detailed Implementation

[0020] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0021] Example 1: Please see Figure 1-2 This utility model provides a technical solution: A progressive die quick-change device includes a lower die base 1, a lower pad plate 2, a die fixing plate 3, a fixing ring body 4, and a rotor slotted die 5. The die fixing plate 3 is installed above the lower die base 1. The upper part of the fixed ring body 4 is provided with a cavity hole. The fixed ring body 4 is detachably embedded in the cavity hole of the die fixing plate 3. The rotor groove die 5 is interference-fitted into the inner hole of the fixed ring body 4. The lower die base 1 is provided with an ejection mechanism. The ejection mechanism acts on the bottom of the fixed ring body 4 to provide a stable ejection force when changing the die, and ejects the entire fixed ring body 4 from the cavity hole of the die fixing plate 3.

[0022] In the above scheme, when replacing the rotor slot die 5, the operator first loosens the fastening screw 17 used to fasten the fixed ring 4 to the lower die base 1, and then starts or operates the ejection mechanism set inside the lower die base 1. The ejection mechanism generates a stable and vertically upward ejection force acting on the bottom of the fixed ring 4. This ejection force is evenly applied to the fixed ring 4, overcoming the fitting resistance between it and the cavity hole of the die fixing plate 3, so that the fixed ring 4 with the rotor slot die 5 is ejected smoothly and completely from the cavity hole of the die fixing plate 3 as a whole module, realizing quick disassembly. The installation is done by reversing the operation.

[0023] The above solution solves the problem caused by relying on "knocking" to remove the fixed ring 4 in the background technology, eliminates the dependence on the operator's personal skills and experience, avoids the problem of the fixed ring 4 getting stuck due to uneven hammering force or inaccurate position, as well as the problem of damage or wear to the precision mating surface, thus ensuring the positional accuracy of the die fixing plate 3 and the production stability of the mold in the long term, while making the replacement operation safer, less labor-intensive, reliable and efficient.

[0024] The ejection mechanism is a hydraulic ejection mechanism, which includes at least one hydraulic cylinder chamber 6 located within the lower mold base 1. A piston 7 is disposed within the hydraulic cylinder chamber 6, and an oil passage 8 for oil supply is fixedly connected to the outside of the hydraulic cylinder chamber 6. The top of the piston 7 contacts the bottom of the fixed ring 4, and the oil passage 8 leads to the outside of the lower mold base 1 and is connected to a quick connector.

[0025] In the above scheme, when it is necessary to change the mold, an external hydraulic pump supplies oil to the oil circuit 8 connected to the quick connector. The pressurized oil enters the hydraulic cylinder chamber 6 and pushes the internal piston 7 to move upward. Since the top of the piston 7 is in direct contact with the bottom of the fixed ring 4, the piston 7 is converted into a vertically upward mechanical ejection force through stable and powerful hydraulic pressure. This force is evenly applied to the entire bottom of the fixed ring 4, thereby overcoming the resistance between it and the die fixing plate 3 and smoothly ejecting the entire module. This achieves a disassembly process that is efficient and non-destructive without the need for hammering.

[0026] The side wall of the fixed ring body 4 is provided with a fixed ring ejection screw hole 16, which is used to screw in a screw after the ejection mechanism has ejected the fixed ring body 4 for a certain distance to provide auxiliary pulling force or as a manual backup solution.

[0027] In the above scheme, the fixing ring ejection screw hole 16 serves as a redundant safety design and auxiliary means. When the ejection mechanism fails to completely eject the fixing ring body 4 due to an accident, such as insufficient pressure or excessive tightness, it acts as a manual backup solution in the absence of power. After the fixing ring body 4 has been ejected for a certain distance, the operator can screw a screw into the fixing ring ejection screw hole 16. As the screw is continuously screwed in, its head will press against the lower die fixing plate 3 or lower die base 1, thereby generating a reverse pulling force to help pull the fixing ring body 4 out of the cavity hole, ensuring the reliability of the replacement process.

[0028] The lower mold base 1 is provided with a fastening screw 17, which passes through the bottom of the lower mold base 1 and is threadedly connected to the fixing ring 4 for fixation.

[0029] The fastening screw 17 is used for locking and fixing during normal stamping production of the mold. It is screwed in from the bottom of the lower mold base 1 and finally engaged with the threaded hole at the bottom of the fixing ring body 4. By tightening these screws, a strong downward locking force is generated, which firmly connects the fixing ring body 4, the die fixing plate 3, the lower pad plate 2 and the lower mold base 1 into a whole, effectively preventing the fixing ring body 4 from loosening or shifting during the stamping process, and ensuring the working rigidity and stamping accuracy of the mold.

[0030] The fixing ring 4 and the cavity hole of the die fixing plate 3 are fitted with a transition fit, and the outer edge of the fixing ring 4 near the cavity hole of the die fixing plate 3 is chamfered.

[0031] In the above scheme, the transition fit between the fixed ring body 4 and the cavity hole of the die fixing plate 3 ensures that the two have extremely high coaxiality and positional accuracy after assembly, and can effectively resist lateral forces during stamping. The chamfer set on the outer edge of the fixed ring body 4 provides a guide for assembly based on the precision fit. When the fixed ring body 4 is reinstalled after ejection, it can easily guide the fixed ring body 4 to accurately enter the cavity hole of the die fixing plate 3, realize fast and accurate centering and initial positioning, and greatly simplify the installation operation.

[0032] The outer wall of the fixed ring body 4 is provided with a fixed ring anti-rotation pin 18, and the inner wall of the cavity hole of the die fixing plate 3 is provided with a corresponding pin hole; the outer wall of the rotor groove die 5 is provided with a groove die anti-rotation pin 19, and the inner wall of the fixed ring body 4 is provided with a corresponding pin hole.

[0033] This anti-rotation pin mechanism uses mechanical interlocking to prevent circumferential rotation of key components during operation. Specifically, it consists of two layers: First, the fixed ring anti-rotation pin 18 is embedded in corresponding pin holes on the outer wall of the fixed ring body 4 and the inner wall of the cavity hole in the die fixing plate 3, preventing the fixed ring body 4 from rotating within the die fixing plate 3; Second, the slotted die anti-rotation pin 19 is embedded in corresponding pin holes on the outer wall of the rotor slotted die 5 and the inner wall of the fixed ring body 4, preventing the rotor slotted die 5 from rotating within the fixed ring 4. This two-layer anti-rotation design ensures that the entire die system maintains a precise circumferential angular position even under uneven punching torque, thereby guaranteeing the slot shape accuracy of the stamped product.

[0034] Example 2: Please see Figure 3-4 Furthermore, in conjunction with Embodiment 1, it is further found that the ejection mechanism is a spiral ejection mechanism, including at least two threaded holes symmetrically opened at the bottom of the fixed ring body 4, and a matching ejection bolt 10; the lower pad 2 and the lower mold base 1 are provided with through holes corresponding to the positions of the threaded holes, the ejection bolt 10 passes through the through holes and is screwed into the threaded hole of the fixed ring body 4, and the fixed ring body 4 is lifted by rotating the ejection bolt 10.

[0035] In the above scheme, when it is necessary to change the mold, the operator uses a tool to rotate the ejector bolt 10. The ejector bolt 10 passes through the through holes on the lower mold base 1 and the lower pad 2 and is screwed into the threaded hole at the bottom of the fixed ring body 4. As the ejector bolt 10 is continuously screwed in, its head will abut against the lower mold base 1 or the lower pad 2. Thus, by utilizing the mechanical principle of the screw pair, the rotational motion of the bolt is converted into a stable, controllable and powerful vertical upward thrust, which directly acts on the fixed ring body 4, thereby overcoming the fitting resistance and smoothly ejecting the entire fixed ring body 4 module from the die fixing plate 3.

[0036] The ejector bolt 10 is fixedly connected to a linkage gear 11 at one end away from the fixed ring body 4. A toothed ring 12 that rotatably engages with the linkage gear 11 is rotatably provided inside the lower mold base 1. The inner side of the toothed ring 12 meshes with the linkage gear 11. A drive component that drives the toothed ring 12 to rotate is installed inside the lower mold base 1.

[0037] The aforementioned linkage gear 11 and gear ring 12 mechanism realizes the synchronous movement of multiple ejector bolts 10. By setting a rotatable gear ring 12 inside the lower mold base 1, the linkage gear 11 at the end of each ejector bolt 10 meshes with the inner side of the gear ring 12. When the external drive unit drives the gear ring 12 to rotate, the gear ring 12 will simultaneously drive all the linkage gears 11 that mesh with it to rotate synchronously, in the same direction and at the same speed, thereby ensuring that all ejector bolts 10 rotate the same number of times, generating an absolutely balanced lifting force, and preventing the fixed ring 4 from tilting or jamming due to uneven force during the ejection process.

[0038] The driving components are a servo motor 14 and a drive gear 15. The servo motor 14 is fixedly installed in the lower mold base 1, and the drive gear 15 of the servo motor 14 meshes with the inner side of the gear ring 12.

[0039] By fixing the servo motor 14 inside the lower mold base 1 and installing the drive gear 15 on its output shaft, which meshes with the inner side of the gear ring 12, the servo motor 14 receives a command and starts when ejection is required. The drive gear 15 drives the gear ring 12 to rotate precisely, thereby ultimately transmitting the motor's power to all ejection bolts 10. This achieves automation of the ejection process, precise control of the ejection stroke and speed, and further improves the convenience and reliability of operation.

[0040] The working principle of this progressive die quick-change device is as follows: During normal production, the fixing ring 4 is firmly locked onto the lower die base 1 by the fastening screw 17. When changing the die, first loosen the fastening screw 17, then operate the ejection mechanism. The hydraulic ejection mechanism uses an external hydraulic pump to supply oil to push the piston 7 out. The spiral ejection mechanism rotates the ejection bolt 10 or starts the servo motor 14 to drive the gear ring 12 to drive the linkage gear 11, causing the ejection bolt 10 to rise synchronously, thereby generating a smooth upward ejection force to eject the fixing ring 4, which contains the rotor slotted die 5, entirely from the cavity hole of the die fixing plate 3. If the ejection is incomplete, a screw can be screwed into the fixing ring ejection screw hole 16 to assist in pulling it out. During installation, the chamfered outer edge of the fixing ring 4 can be used as a guide to quickly and accurately align and install it. This device achieves quick and reliable die replacement without hammering, ensuring die accuracy and production stability.

[0041] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A progressive die quick-change device, comprising a lower die base (1), a lower pad plate (2), a die fixing plate (3), a fixing ring body (4), and a rotor slot die (5), wherein the die fixing plate (3) is installed above the lower die base (1). The upper part of the fixed ring body (4) is provided with a cavity hole, and the fixed ring body (4) is detachably embedded in the cavity hole of the die fixing plate (3). The rotor slot die (5) is interference-fitted into the inner hole of the fixed ring body (4). The characteristic is that: The lower mold base (1) is provided with an ejection mechanism. The ejection mechanism acts on the bottom of the fixed ring body (4) to provide a stable ejection force when changing the mold, and eject the fixed ring body (4) as a whole from the cavity hole of the die fixing plate (3).

2. The progressive die quick-change device according to claim 1, characterized in that: The ejection mechanism is a hydraulic ejection mechanism, which includes at least one hydraulic cylinder chamber (6) opened in the lower mold base (1), a piston (7) is provided in the hydraulic cylinder chamber (6), and an oil passage (8) for oil supply is fixedly connected to the outside of the hydraulic cylinder chamber (6).

3. The progressive die quick-change device according to claim 2, characterized in that: The top of the piston (7) contacts the bottom of the fixed ring (4), and the oil passage (8) leads to the outside of the lower mold base (1) and is connected to a quick connector.

4. The progressive die quick-change device according to claim 1, characterized in that: The ejection mechanism is a spiral ejection mechanism, including at least two threaded holes symmetrically opened at the bottom of the fixed ring body (4) and a matching ejection bolt (10); the lower pad (2) and the lower mold base (1) are provided with through holes corresponding to the threaded holes, the ejection bolt (10) passes through the through hole and is screwed into the threaded hole of the fixed ring body (4), and the fixed ring body (4) is lifted by rotating the ejection bolt (10).

5. A progressive die quick-change device according to claim 4, characterized in that: The end of the ejector bolt (10) away from the fixed ring body (4) is fixedly connected to the linkage gear (11). The lower mold base (1) is rotatably provided with a toothed ring (12) that cooperates with the linkage gear (11). The inner side of the toothed ring (12) meshes with the linkage gear (11). The lower mold base (1) is equipped with a drive component that drives the toothed ring (12) to rotate.

6. The progressive die quick-change device according to claim 5, characterized in that: The driving components are a servo motor (14) and a drive gear (15). The servo motor (14) is fixedly installed in the lower mold base (1), and the drive gear (15) of the servo motor (14) meshes with the inner side of the gear ring (12).

7. A progressive die quick-change device according to any one of claims 1 to 5, characterized in that: The side wall of the fixing ring body (4) is provided with a fixing ring pull-out screw hole (16) for screwing in a screw to provide auxiliary pull-out force.

8. A progressive die quick-change device according to claim 7, characterized in that: The lower mold base (1) is provided with a fastening screw (17), which passes through the bottom of the lower mold base (1) and is threadedly connected to the fixing ring (4) for fixation.

9. A progressive die quick-change device according to claim 8, characterized in that: The fixed ring body (4) and the cavity hole of the die fixing plate (3) are fitted with a transition fit, and the outer edge of the fixed ring body (4) near the cavity hole of the die fixing plate (3) is provided with a chamfer.

10. A progressive die quick-change device according to claim 9, characterized in that: The outer wall of the fixed ring body (4) is provided with a fixed ring anti-rotation pin (18), and the inner wall of the cavity hole of the die fixing plate (3) is provided with a corresponding pin hole; the outer wall of the rotor groove die (5) is provided with a groove die anti-rotation pin (19), and the inner wall of the fixed ring body (4) is provided with a corresponding pin hole.

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