Movable die clamping mechanism of cold heading machine

Abstract

The utility model discloses a movable die clamping mechanism of a cold heading machine. The movable die clamping mechanism comprises a die holder and a pressing block. The die holder comprises an installation part and a protruding part connected with the installation part, the installation part is detachably installed on the movable die assembly through a first fastening assembly, a through hole horizontally extending to the installation part is formed in the protruding part, the through hole is matched with the outer contour of the punching die, and a notch communicated with the through hole is formed in the top of the protruding part; the pressing block is vertically arranged on the notch in a sliding mode and detachably connected with the die base through a second fastening assembly, a pressing arc face matched with the outer contour of the punching die is arranged at the bottom of the pressing block, and when the pressing block is installed in place, the pressing arc face is matched with the through hole to fix the position of the punching die. According to the movable die clamping mechanism of the cold heading machine, high-stability clamping of the punching die is achieved, and the left-right position of the punching die can be accurately adjusted.

Description

Technical Field

[0001] This utility model relates to the technical field of cold heading machine equipment, and in particular to a clamping mechanism for a moving mold in cold heading. Background Technology

[0002] Cold heading machines are key equipment used for cold forming of metal parts. The moving die assembly, as one of its core components, is responsible for precisely fixing the die during high-speed stamping, ensuring the dimensional accuracy and surface quality of the formed parts. The design of the moving die clamping mechanism directly affects the installation stability, positioning accuracy, and production efficiency of the die, especially under high-load, high-frequency processing conditions, where the reliability and adjustability requirements of the clamping mechanism are even more stringent.

[0003] Traditional cold heading die clamping mechanisms often employ a design where screws directly press against the outer wall of the die. While this structure is simple, it has significant drawbacks: due to the limited contact area between the screws and the die, the clamping stability is insufficient, which can easily lead to slight displacement of the die during processing, and in severe cases, even cause the die to fall off, directly affecting the continuity and safety of equipment operation; at the same time, the clamping force is concentrated in a local area, which can easily form indentations on the die surface, exacerbating die wear.

[0004] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a cold heading moving die clamping mechanism, which aims to solve the technical problem of insufficient clamping stability of punch dies in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A cold heading machine clamping mechanism includes:

[0008] The mold base includes a mounting part and a protrusion connected to the mounting part. The mounting part is detachably mounted on the moving mold assembly by a first fastening component. The protrusion has a through hole extending horizontally to the mounting part. The through hole is adapted to the outer contour of the punch. The top of the protrusion has a notch communicating with the through hole.

[0009] The pressure block is vertically slidably disposed on the notch and is detachably connected to the die base through the second fastening component. The bottom of the pressure block is provided with a pressing arc surface that matches the outer contour of the die. When the pressure block is installed in place, the pressing arc surface cooperates with the through hole to fix the position of the die.

[0010] Furthermore, one side of the notch extends to the end of the mounting portion.

[0011] Furthermore, the top of the pressure block is provided with a horizontally extending flange, which is connected to the mounting part by a second fastening assembly.

[0012] Furthermore, the top of the pressure block is provided with a vertically extending first screw hole, which is used for screwing with a mounting eye.

[0013] Furthermore, the bottom of the first screw hole extends to the clamping arc surface, and the first screw hole is used to screw with the ejector screw.

[0014] Furthermore, the mounting portion is provided with a horizontally extending adjustment groove and a positioning hole located below the adjustment groove; the first fastening assembly includes:

[0015] The first stud that passes through the adjustment groove has one end for mounting on the moving mold assembly and the other end screwed with the first nut;

[0016] A sleeve coaxially fitted inside a positioning hole;

[0017] The second stud that passes through the sleeve has one end for mounting on the moving mold and the other end screwed with a second nut;

[0018] The mold base can swing around the axis of the second stud, and the adjustment groove provides swing stroke space for the first stud.

[0019] Furthermore, the two side walls of the mounting part are respectively provided with second screw holes communicating with the adjustment groove, and each second screw hole is screwed with an adjustment screw, the end of each adjustment screw abutting against the side of the first stud.

[0020] Furthermore, the top of the pressure block is provided with a clearance position for avoiding the first nut.

[0021] Beneficial effects:

[0022] This utility model provides a clamping mechanism for a cold heading moving mold, which has the following advantages:

[0023] (1) The large-area design of the pressing arc surface and the through hole of the die base form a full-enclosed constraint on the die. Combined with the second fastening component, the contact area and stress distribution uniformity are significantly improved, and the high stability of the die clamping is achieved; (2) The first fastening component, together with the adjustment groove and positioning hole, forms a swing adjustment mechanism, and the left and right positions of the die are precisely adjusted by the adjustment screws on both sides; (3) The top of the pressure block is provided with a first screw hole, which is used for the installation of the lifting ring and the ejector screw, realizing the dual functions of lifting assistance and push-out separation, simplifying the overall structure and improving maintenance efficiency. Attached Figure Description

[0024] Figure 1 The structural diagram of the cold heading machine clamping mechanism provided by this utility model;

[0025] Figure 2 Exploded view of the cold heading machine clamping mechanism provided by this utility model;

[0026] Figure 3 This is a front view of the cold heading machine clamping mechanism provided by this utility model;

[0027] Figure 4 A side sectional view of the cold heading machine clamping mechanism provided by this utility model;

[0028] Figure 5 This is a main sectional view of the cold heading machine clamping mechanism provided by this utility model;

[0029] Figure 6 This is a structural diagram of the cold heading moving die clamping mechanism provided by this utility model in the state of clamping the punch die;

[0030] Figure 7 A structural diagram showing the connection between the clamping mechanism and the mounting ring of the cold heading machine mold provided by this utility model;

[0031] Figure 8 This is a structural diagram showing the connection between the clamping mechanism and the ejector screw of the cold heading moving mold provided by this utility model.

[0032] Reference numerals: mold base 1, mounting part 11, protrusion 12, through hole 13, notch 14, adjusting groove 15, positioning hole 16, second screw hole 17, first fastening assembly 2, first stud 21, first nut 22, sleeve 23, shoulder 231, second stud 24, second nut 25, pressure block 3, pressing arc surface 31, flange 32, first screw hole 33, clearance position 34, second fastening assembly 4, mounting ring 5, ejector screw 6, adjusting screw 7. Detailed Implementation

[0033] This utility model provides a clamping mechanism for a cold heading moving mold. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0034] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," and "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes 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 one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0035] Please see Figures 1 to 8 As shown, this utility model provides a clamping mechanism for a cold heading moving die, including a die base 1 and a pressure block 3. The die base 1 includes a mounting part 11 and a protrusion 12 connected to the mounting part 11. The mounting part 11 is detachably mounted on the moving die assembly by a first fastening component 2. The protrusion 12 is provided with a through hole 13 extending horizontally to the mounting part 11. The through hole 13 is adapted to the outer contour of the die. The top of the protrusion 12 has a notch 14 communicating with the through hole 13. The pressure block 3 is vertically slidably disposed on the notch 14 and is detachably connected to the die base 1 by a second fastening component 4. The bottom of the pressure block 3 is provided with a pressing arc surface 31 adapted to the outer contour of the die. When the pressure block 3 is installed in place, the pressing arc surface 31 and the through hole 13 cooperate to fix the position of the die.

[0036] During installation, the die base 1 is first installed on the moving die assembly using the first fastening component 2. Then, the die is horizontally inserted into the through hole 13, ensuring its outer contour fits snugly against the inner wall of the through hole 13. Next, the pressure block 3 is pressed downwards along the top of the notch 14, causing the pressing arc surface 31 to fully abut against the outer contour of the die. At this point, the pressure block 3 is locked using the second fastening component 4, forcing the pressing arc surface 31 and the inner wall of the through hole 13 to form a full-enclosed constraint on the die, thus fixing its position. This structure, through the large-area design of the pressing arc surface 31, presses against the outer wall of the die, increasing the contact area between the pressure block 3 and the die, resulting in high die clamping stability. Compared to existing technologies, this effectively disperses the concentrated stress in traditional screw clamping methods, significantly improving clamping stability and preventing the die from slight displacement or detachment during high-speed stamping.

[0037] In a preferred embodiment, see [reference] Figure 2One side of the notch 14 extends to the end of the mounting portion 11, forming an open structure. This design allows the clamping arc surface 31 of the pressure block 3 to cover the outer wall of the die along the axial direction, significantly expanding the contact area and evenly distributing the clamping stress to a larger surface area of ​​the die, thereby effectively suppressing localized stress concentration caused by processing vibrations. Simultaneously, the open structure design provides axial operating space for the assembly and disassembly of the pressure block 3. During disassembly, the pressure block 3 can be moved horizontally along the extension direction of the notch 14, allowing for quick replacement or maintenance of the die, greatly simplifying the maintenance process.

[0038] In a preferred embodiment, see [reference] Figure 1 , 2 The pressure block 3 has a horizontally extending flange 32 at its top, which is connected to the mounting part 11 via a second fastening assembly 4. The two flanges 32 form symmetrically distributed load-bearing arms. In this embodiment, the second fastening assembly 4 includes four screws, which are evenly distributed on the two flanges 32. The screws pass through the flanges 32 and connect to the protrusion 12. By applying a symmetrical locking force, uniform pressure is generated during the pressing of the pressure block 3, so as to stably clamp the die onto the through hole 13.

[0039] In a preferred embodiment, see [reference] Figure 4 , 7 The pressure block 3 has a vertically extending first screw hole 33 at its top, which is used to screw onto the mounting ring 5. When installing the mold base 1, the pressure block 3 can be pre-installed at the notch 14 position of the mold base 1 using the second fastening assembly 4. Then, the mounting ring 5 is screwed into the first screw hole 33. The mold base 1 and pressure block 3 are then smoothly moved to the installation position of the moving mold assembly using a hoisting method. After the mold base 1 is positioned, the first fastening assembly 2 is used to complete the fixed connection between the mold base 1 and the moving mold assembly. By integrating the first screw hole 33 built into the pressure block 3 with the hoisting function, the replacement process of the mold base 1 is significantly simplified, and the assembly and disassembly efficiency of the mold base 1 is improved.

[0040] Further, see Figure 4 , 8 The bottom of the first screw hole 33 extends to the clamping arc surface 31, and the first screw hole 33 is used to screw the ejector screw 6. When replacing the die, first release the constraint of the second fastening component 4 on the pressure block 3. At this time, due to the adsorption effect generated by the long-term close contact between the clamping arc surface 31 and the die, the pressure block 3 is difficult to separate from the die. During operation, the ejector screw 6 is screwed into the first screw hole 33. As the ejector screw 6 is screwed in, its bottom end gradually abuts against the outer wall of the die and generates a reverse pushing force, forcing the pressure block 3 to move smoothly upward along the notch 14, realizing rapid separation from the die. At this time, the old die can be pulled out axially along the through hole 13 and replaced with a new die.

[0041] It should be noted that the thread parameters of the ejector screw 6 are fully compatible with the installation ring 5, enabling the single first screw hole 33 to serve the dual functions of lifting assistance and jacking separation, further simplifying the overall structure and improving maintenance efficiency.

[0042] In a preferred embodiment, see [reference] Figure 2 , 4 5. The mounting part 11 is provided with a horizontally extending adjustment groove 15 and a positioning hole 16 located below the adjustment groove 15; the first fastening assembly 2 includes a first stud 21, a sleeve 23 and a second stud 24; one end of the first stud 21 is used to be mounted on the moving mold assembly, and the other end passes through the adjustment groove 15 and is screwed with a first nut 22; the sleeve 23 is coaxially sleeved in the positioning hole 16; one end of the second stud 24 is used to be mounted on the moving mold, and the other end passes through the sleeve 23 and is screwed with a second nut 25; wherein, the mold base 1 can swing around the axis of the second stud 24, and the adjustment groove 15 provides the swing stroke space for the first stud 21. When it is necessary to make a fine adjustment to the left and right position of the punch, first loosen the first nut 22 and the second nut 25, at which time the mold base 1 can swing freely around the axis of the second stud 24, and the first stud 21 slides relative to the mold base 1 in the adjustment groove 15. After the axis of the punching die is precisely aligned with the center line of the die of the cold heading machine, the first nut 22 and the second nut 25 are locked in sequence, and the die base 1 is firmly fixed in the target position by the double nut locking mechanism.

[0043] Preferably, the sleeve 23 has a shoulder 231 on its outer side, which is pressed against the mounting part 11. The shoulder 231 of the sleeve 23 constrains the axial movement of the mold base 1 through surface contact, ensuring the stability of the swing trajectory of the mold base 1.

[0044] Further, see Figure 5 The mounting section 11 has two side walls respectively provided with second screw holes 17 communicating with the adjustment groove 15. Each second screw hole 17 is screwed with an adjustment screw 7. The end of each adjustment screw 7 abuts against the side of the first stud 21, forming a bidirectional fine-tuning structure. When the position of the mold base 1 needs to be finely adjusted, by screwing in one side adjustment screw 7 and simultaneously unscrewing the other side adjustment screw 7, the end of the screwed-in adjustment screw 7 abuts against the first stud 21 and generates a reverse force, forcing the mold base 1 to swing around the axis of the second stud 24, so as to realize the controllable angular displacement adjustment of the mold base 1. Through the above setting, the manual screwing operation is transformed into the precise adjustment of the swing angle of the mold base 1, which can not only eliminate the impact damage to the mold base 1 caused by the traditional hammering adjustment method, but also achieve micron-level position correction.

[0045] Furthermore, see Figure 1 , 2The top of the pressure block 3 is provided with a clearance position 34 for avoiding the first nut 22. When the pressure block 3 moves upward, the clearance position 34 provides radial space margin for the first nut 22, ensuring that the pressure block 3 has no structural interference with the first fastening component 2 during vertical separation, while maintaining the overall compactness of the mold base 1.

[0046] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A clamping mechanism for a cold heading machine mold, characterized in that, include: The mold base (1) includes a mounting part (11) and a protrusion (12) connected to the mounting part (11). The mounting part (11) is detachably mounted on the moving mold assembly by a first fastening component (2). The protrusion (12) is provided with a through hole (13) extending horizontally to the mounting part (11). The through hole (13) is adapted to the outer contour of the die. The top of the protrusion (12) has a notch (14) communicating with the through hole (13). The pressure block (3) is vertically slidably disposed on the notch (14) and is detachably connected to the die base (1) by the second fastening component (4). The bottom of the pressure block (3) is provided with a pressing arc surface (31) that is adapted to the outer contour of the die. When the pressure block (3) is installed in place, the pressing arc surface (31) and the through hole (13) cooperate to fix the position of the die.

2. The cold heading moving die clamping mechanism according to claim 1, characterized in that, One side of the notch (14) extends to the end of the mounting part (11).

3. The cold heading moving die clamping mechanism according to claim 1 or 2, characterized in that, The pressure block (3) has a horizontally extending flange (32) at its top, and the flange (32) is connected to the mounting part (11) through the second fastening assembly (4).

4. The cold heading moving die clamping mechanism according to claim 1 or 2, characterized in that, The pressure block (3) has a vertically extending first screw hole (33) at its top, which is used to screw onto the mounting ring (5).

5. The cold heading moving die clamping mechanism according to claim 4, characterized in that, The bottom of the first screw hole (33) extends to the clamping arc surface (31), and the first screw hole (33) is used to screw with the ejector screw (6).

6. The cold heading moving die clamping mechanism according to claim 1 or 2, characterized in that, The mounting portion (11) is provided with a horizontally extending adjustment groove (15) and a positioning hole (16) located below the adjustment groove (15); the first fastening assembly (2) includes: The first stud (21) that passes through the adjustment groove (15) has one end for mounting on the moving mold assembly and the other end for screwing a first nut (22); A sleeve (23) is coaxially fitted inside the positioning hole (16); The second stud (24) that passes through the sleeve (23) has one end for mounting on the moving mold and the other end for screwing a second nut (25); The mold base (1) can swing around the axis of the second stud (24), and the adjustment groove (15) provides swing stroke space for the first stud (21).

7. The cold heading moving die clamping mechanism according to claim 6, characterized in that, The mounting part (11) has two side walls respectively provided with second screw holes (17) communicating with the adjustment groove (15). Each second screw hole (17) is screwed with an adjustment screw (7), and the end of each adjustment screw (7) abuts against the side of the first stud (21).

8. The cold heading machine clamping mechanism according to claim 6, characterized in that, The top of the pressure block (3) is provided with a clearance position (34) for avoiding the first nut (22).

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