Hydraulic locking mechanism for stamping die holder

Abstract

The utility model relates to a hydraulic locking mechanism for a stamping die holder, which comprises a front plate, a rear plate, a rear plate, a hydraulic cylinder and a hydraulic cylinder, and is characterized in that one side of the front plate is fixedly connected to a slider of a cold header; the bottom plate is arranged on the other side of the front plate; the adjusting plate is arranged on the side, away from the front plate, of the bottom plate, and the stamping die base is fixedly connected to the adjusting plate in an adjustable mode; the hydraulic driver is arranged on the front plate; and the locking piece is driven by the hydraulic driver to move between a first position and a second position. According to the hydraulic locking mechanism for the stamping die base, the hydraulic driver drives the locking piece to be switched between the locking position and the unlocking position, the design that the bottom plate can vertically move and the bottom of the locking groove is provided with an opening is combined, rapid and reliable locking and convenient unlocking of the stamping die base are achieved, stable and sufficient locking force can be provided, and the stamping die base can be locked and unlocked conveniently. And the stability in the cold heading operation process is ensured.

Description

Technical Field

[0001] This application relates to the field of cold heading equipment technology, and in particular to a hydraulic locking mechanism for a punch die seat. Background Technology

[0002] Cold heading machines are key equipment in metal plastic forming processes, widely used in the mass production of fasteners, automotive parts, and irregularly shaped components. During the cold heading process, the die holder and the die fixed on it are the core components that directly bear enormous impact loads and high-frequency reciprocating motion. Therefore, the connection and fixing method between the die holder and the cold heading machine slide is crucial for ensuring processing accuracy, extending die life, and guaranteeing safe equipment operation.

[0003] Currently, the main method for fixing the die holder of a cold heading machine is to secure it to the slide block using multiple high-strength bolts. This method is simple in structure and low in cost. However, its main drawback is that when changing or adjusting the die, operators need to manually loosen or tighten each bolt one by one. This is not only time-consuming and labor-intensive, but also seriously affects production efficiency, especially unsuitable for flexible production scenarios that require frequent die changes. In addition, when manually tightening the bolts, it is difficult to ensure that the preload of each bolt is uniform, which may lead to uneven stress on the die holder, affecting machining accuracy, and even causing loosening under long-term high-frequency impact. Utility Model Content

[0004] To address the aforementioned issues, this application provides a hydraulic locking mechanism for a die holder that utilizes vertical movement of the base plate and an open bottom of the locking groove to achieve rapid and reliable locking and convenient clearance during unlocking, thereby improving the efficiency of die adjustment and replacement.

[0005] To achieve the above objectives, this application designs a hydraulic locking mechanism for a die holder, applied to a cold heading machine, comprising: a front plate, one side of which is fixedly connected to a slider of the cold heading machine; a base plate, disposed on the other side of the front plate; an adjusting plate, disposed on the side of the base plate opposite to the front plate, the die holder being adjustablely fixedly connected to the adjusting plate; a hydraulic actuator, disposed on the front plate; and a locking member, driven by the hydraulic actuator, to move between a first position and a second position; wherein, the base plate has a locking groove adapted to the locking member, the bottom of which has an opening; when the locking member is in the first position, the locking member forms a locking engagement with the locking groove to lock the base plate relative to the front plate; when the locking member is in the second position, the locking member releases the locking engagement with the locking groove, and the base plate is configured to move vertically relative to the front plate, so that the locking member disengages from the locking groove through the opening of the locking groove.

[0006] Preferably, the locking groove has a T-shaped cross-section, the locking member has a locking end adapted to the T-shaped cross-section, and a driving end passing through the front plate and connected to the hydraulic actuator.

[0007] Preferably, the driving end of the locking member extends out of the front plate to form an exposed portion, and at least one limiting protrusion is provided on the exposed portion, the limiting protrusion having a wedge surface facing the front plate; it also includes a wedge block, the wedge block being configured to cooperate with the wedge surface and connected and fixed to the power output end of the hydraulic actuator, the hydraulic actuator driving the wedge block to move vertically along the wedge surface, so as to drive the locking member to move between the first position and the second position.

[0008] Preferably, the wedge is a U-shaped structure that spans the exposed portion of the locking member.

[0009] Preferably, the hydraulic actuator is a hydraulic cylinder.

[0010] Preferably, the bottom edge of the front plate is provided with a stepped groove; it also includes a pressure block, which is fixedly connected to the opening of the stepped groove by fasteners; the groove wall of the stepped groove cooperates with the pressure block to jointly define a mounting hole through which the drive end of the locking member passes.

[0011] Preferably, a plurality of hydraulic actuators and a plurality of corresponding locking elements are provided at intervals along the length direction of the bottom edge of the front plate; a connecting plate is provided on the top edge of the front plate, and the connecting plate is connected and fixed to the bottom plate by fasteners.

[0012] The hydraulic locking mechanism for the die holder designed in this application uses a hydraulic actuator to drive the locking element to switch between locked and unlocked positions. Combined with the vertical movement of the base plate and the open design at the bottom of the locking groove, it achieves rapid, reliable locking and convenient unlocking of the die holder. This structure not only provides stable and sufficient locking force, ensuring stability during cold heading operations, but also allows the vertical movement of the base plate during unlocking, enabling the locking element to smoothly and completely disengage through the open locking groove. This provides ample operating space and convenience for adjusting or replacing the die holder, significantly shortening auxiliary operation time and improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the cold heading machine provided in the embodiments of this application.

[0014] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0015] Figure 3This is a three-dimensional structural schematic diagram of the hydraulic locking mechanism for the die holder provided in the embodiments of this application.

[0016] Figure 4 yes Figure 3 Enlarged diagram of point B in the middle.

[0017] Figure 5 This is a schematic diagram of the planar structure of the hydraulic locking mechanism for the die holder provided in the embodiments of this application.

[0018] The components include: cold heading machine 100, slider 101, punch die base 102, front plate 10, stepped groove 11, base plate 20, locking groove 21, adjusting plate 30, hydraulic actuator 40, locking component 50, locking end 51, driving end 52, exposed part 521, limiting protrusion 522, wedge surface 523, wedge block 60, pressure block 70, and connecting plate 80. Detailed Implementation

[0019] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0020] like Figures 1 to 5 As shown, this embodiment provides a hydraulic locking mechanism for a die holder 102 applied to a cold heading machine 100. The mechanism includes a front plate 10, a base plate 20, an adjusting plate 30, a hydraulic actuator 40, and a locking element 50.

[0021] Specifically, one side of the front plate 10, for example, the side facing away from the die holder 102, is fixedly connected to the slider 101 of the cold heading machine 100 by bolts or other fasteners, so that the front plate 10 reciprocates together with the slider 101. The bottom plate 20 is disposed on the other side of the front plate 10, usually facing the die holder 102 so that the operator can access or observe it, and the bottom plate 20 and the surface of the front plate 10 can be parallel or closely attached.

[0022] An adjusting plate 30 is disposed on the side of the base plate 20 opposite to the front plate 10. The die holder 102 (including a die) is fixed to the adjusting plate 30 by an adjustable connection. For example, the adjusting plate 30 is provided with a T-slot or adjusting screw hole. The die holder 102 can be moved and locked in the T-slot by bolts and T-nuts, or the position can be finely adjusted and fixed by adjusting screws.

[0023] The hydraulic actuator 40, employing, for example, one or more hydraulic cylinders, is mounted and fixed at a suitable position on the front plate 10, such as the lower part or side of the front plate 10. The power output end (such as the piston rod) of the hydraulic actuator 40 is connected to the locking member 50.

[0024] The locking member 50 is one or more, which is driven by the hydraulic driver 40 and is capable of linear reciprocating movement between a first position (locked position) and a second position (unlocked position).

[0025] The base plate 20 has a locking groove 21 that is adapted to the locking member 50. The bottom of the locking groove 21 has an opening, that is, the locking groove 21 is open at the bottom of the base plate 20, rather than a closed blind hole or blind groove.

[0026] When the locking member 50 is in the first position, the locking member 50 forms a locking engagement with the locking groove 21 to lock the bottom plate 20 relative to the front plate 10; when the locking member 50 is in the second position, the locking member 50 releases the locking engagement with the locking groove 21, and the bottom plate 20 is configured to move vertically relative to the front plate 10, so that the locking member 50 disengages from the locking groove 21 through the opening of the locking groove 21.

[0027] Using this structural design, during operation, for example: when it is necessary to lock the die holder 102, the hydraulic actuator 40 drives the locking member 50 to move to the first position. In this position, the locking portion of the locking member 50 enters and forms a tight locking engagement (e.g., engagement or snap-fit) with the inner wall of the locking groove 21, thereby effectively locking the position of the base plate 20 relative to the front plate 10, and thus indirectly locking the die holder 102. When it is necessary to adjust or replace the die holder 102, the hydraulic actuator 40 drives the locking member 50 to move from the first position to the second position. In this position, the locking portion of the locking member 50 exits from the locking groove 21 or no longer presses against the base plate 20 to restrict its position, that is, the locking engagement with the locking groove 21 is released. At this time, the base plate 20 is configured to be able to move relative to the front plate 10 in the vertical direction (e.g., upward), and this movement can be achieved by means of an external lifting structure. Because the base plate 20 can move vertically and the bottom of the locking groove 21 has an opening, the upward movement of the base plate 20 allows the locking part of the locking member 50 to completely disengage from the locking groove 21 through the bottom opening, providing uninterrupted space for further movement or disassembly of the base plate 20 (and the adjusting plate 30 and the die holder 102 fixed thereon). In one specific embodiment, the hydraulic actuator 40 is a hydraulic cylinder to achieve reliable hydraulic drive.

[0028] In some embodiments, such as Figure 4 , Figure 5As shown, the locking groove 21 has a T-shaped cross-section, and the locking member 50 has a locking end 51 adapted to the T-shaped cross-section, and a driving end 52 passing through the front plate 10 and being drivenly connected to the hydraulic actuator 40. Accordingly, the locking end 51 is adapted to be T-shaped, capable of embedding into the enlarged portion of the T-shaped locking groove 21 and being restricted by its neck, thereby forming a stable lock. The other end of the locking member 50, i.e., the driving end, is designed to pass through the front plate 10 and be drivenly connected to the power output end of the hydraulic actuator 40 (e.g., the piston rod of a hydraulic cylinder), so that the hydraulic actuator 40 can directly or indirectly drive the locking member 50 to move axially.

[0029] In a more specific implementation, such as Figure 3 , Figure 4 As shown, the driving end 52 of the locking member 50 extends out of the front plate 10 to form an exposed portion 521. The exposed portion 521 is provided with at least one limiting protrusion 522, which has a wedge surface 523 facing the front plate 10. It also includes a wedge block 60, which is configured to cooperate with the wedge surface 523 and is connected and fixed to the power output end of the hydraulic driver 40. The hydraulic driver 40 drives the wedge block 60 to move vertically along the wedge surface 523 to drive the locking member 50 to move between the first position and the second position.

[0030] Using this structural design, the wedge 60 can slide in contact with the wedge surface 521 on the locking member 50. Simultaneously, the wedge 60 is connected and fixed to the power output end of the hydraulic actuator 40 via a connecting member (such as a bolt or pin). When the hydraulic actuator 40 operates, it drives the wedge 60 to move along the direction conforming to the wedge surface 521 (usually perpendicular to the direction of movement of the locking member 50, e.g., vertically). Due to the movement of the wedge 60 and the tilting effect of the wedge surface 521, the wedge 60 generates a component force on the wedge surface 521. This component force drives the locking member 50 to move axially (i.e., between the first and second positions), thereby achieving locking and unlocking actions. This wedge-driven method can convert the small stroke or direct motion of the hydraulic actuator into a larger locking force or precise displacement control of the locking member. In this embodiment, as... Figure 4 , Figure 5 As shown, the wedge 60 has a U-shaped structure that spans the exposed portion 521 of the locking member 50. This U-shaped structure can better contain and guide the exposed portion 51 and provide a stable wedging force.

[0031] In some embodiments, such as Figure 3 , Figure 4As shown, to facilitate the installation and guidance of the locking component 50, a stepped groove 11 is provided on the bottom edge of the front plate 10; it also includes a pressure block 70, which is fixedly connected to the opening of the stepped groove 11 by fasteners; the groove wall of the stepped groove 11 cooperates with the pressure block 70 to jointly define a mounting hole through which the drive end 52 of the locking component 50 passes. This structure facilitates the assembly and maintenance of the locking component 50, and provides good support and guidance for the reciprocating movement of the locking component 50.

[0032] In some embodiments, such as Figure 3 As shown (only one hydraulic actuator 40 is shown in the figure), multiple hydraulic actuators 40 and corresponding locking elements 50 are spaced apart along the length of the bottom edge of the front plate 10. To enhance the uniformity and reliability of locking, especially in wider die holder applications, multiple (e.g., two or three sets) of hydraulic actuators 40 and corresponding locking elements 50 can be spaced apart along the length of the bottom edge of the front plate 10. These actuators and locking elements can operate synchronously to lock the base plate 20. Furthermore, a connecting plate 80 is provided at the top edge of the front plate 10. The connecting plate 80 is connected and fixed to the base plate 20 by fasteners. One end or part of the connecting plate 80 is fixed to or integrally formed with the front plate 10, while the other end or part is connected and fixed to the base plate 20 by fasteners 81 (such as bolts). This connecting plate 80 can help maintain the relative positional relationship between the base plate 20 and the front plate 10 after the locking mechanism is unlocked, or provide additional support during locking.

[0033] The hydraulic locking mechanism for the die holder provided in this embodiment uses a hydraulic driver to switch the locking element between locked and unlocked positions. Combined with the vertically movable base plate and the open design at the bottom of the locking groove, it achieves rapid, reliable locking and convenient unlocking of the die holder. This structure not only provides stable and sufficient locking force, ensuring stability during cold heading operations, but also allows the vertical movement of the base plate during unlocking, enabling the locking element to smoothly disengage completely through the open locking groove. This provides ample operating space and convenience for adjusting or replacing the die holder, significantly shortening auxiliary operation time and improving production efficiency.

[0034] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic locking mechanism of a die holder for a cold header, characterized in that, include: A front plate, one side of which is configured to be fixedly connected to a slider of the cold heading machine; a bottom plate, disposed on the other side of the front plate; An adjusting plate is disposed on the side of the base plate opposite to the front plate, and the die holder is configured to be adjustablely and fixedly connected to the adjusting plate; A hydraulic actuator is disposed on the front plate; a locking member is driven by the hydraulic actuator to move between a first position and a second position; wherein, a locking groove adapted to the locking member is provided on the base plate, the bottom of the locking groove having an opening; when the locking member is in the first position, the locking member forms a locking engagement with the locking groove to lock the base plate relative to the front plate; when the locking member is in the second position, the locking member releases the locking engagement with the locking groove, and the base plate is configured to move vertically relative to the front plate, such that the locking member disengages from the locking groove through the opening of the locking groove.

2. The die set hydraulic lockout mechanism of claim 1, wherein, The locking groove has a T-shaped cross-section, the locking member has a locking end adapted to the T-shaped cross-section, and a driving end that passes through the front plate and is drivenly connected to the hydraulic actuator.

3. The die set hydraulic lockout mechanism of claim 2, wherein, The driving end of the locking member extends out of the front plate to form an exposed portion, and at least one limiting protrusion is provided on the exposed portion. The limiting protrusion has a wedge surface facing the front plate. It also includes a wedge block, which is configured to cooperate with the wedge surface and is connected and fixed to the power output end of the hydraulic driver. The hydraulic driver drives the wedge block to move vertically along the wedge surface to drive the locking member to move between the first position and the second position.

4. The die set hydraulic lockout mechanism of claim 3, wherein, The wedge is a U-shaped structure that spans the exposed portion of the locking member.

5. The die set hydraulic lockout mechanism of claim 3, wherein, The hydraulic actuator is a hydraulic cylinder.

6. The die set hydraulic lockout mechanism of claim 2, wherein, The bottom edge of the front panel is provided with a stepped groove; it also includes a pressure block, which is fixedly connected to the opening of the stepped groove by fasteners; the groove wall of the stepped groove cooperates with the pressure block to jointly define the mounting hole through which the drive end of the locking member passes.

7. The die set hydraulic lockout mechanism of claim 6, wherein, Multiple hydraulic actuators and corresponding locking elements are spaced apart along the length of the bottom edge of the front plate; a connecting plate is provided on the top edge of the front plate, and the connecting plate is connected and fixed to the base plate by fasteners.

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