Rotary inclined punching mechanism for automobile die

Abstract

The utility model discloses a rotary inclined punching mechanism for an automobile die, which comprises an upper slide block, a rotary block, a base and a return element, the rotary block is rotatably connected with the base, the return element is connected with the rotary block, reinforcing ribs are arranged on the rotary block at intervals, and the return element is connected with the rotary block. Wedge guide plates are arranged on the base in a clearance mode, each wedge guide plate is arranged between every two adjacent reinforcing ribs, and the side, close to the rotating block, of the upper sliding block and the wedge guide plates are in limited guide sliding. By arranging the reinforcing ribs and enabling the reinforcing ribs and the wedge guide plate to be arranged in a staggered mode, the height of the reinforcing ribs can be increased, then the rigidity and the overall strength of the rotating block are improved, and meanwhile interference between the reinforcing ribs and the wedge guide plate or the upper sliding block is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile stamping dies, and more specifically, to a rotary oblique punching mechanism for automobile dies. Background Art

[0002] The rotary cam mechanism is a common mechanism in automotive stamping dies, primarily used to achieve negative-angle flanging on automotive panels. Flanging is a stamping process for automotive panels. In most cases, the flanging angle is ≥90°. In this case, the flanging punch can be fixed, and the panel can be removed from the die smoothly after flanging. If the flanging angle is ≤90° (i.e., negative-angle flanging), the panel is difficult to remove from the die. Therefore, to achieve negative-angle flanging, the working part of the rotary cam mechanism must be designed as a cantilever. Furthermore, the flanging force is high, which can lead to cracking of the rotary cam during production.

[0003] The upper slider of the rotating cam must be pressed deeply into the inner cavity of the rotating block to complete the flanging. The overall structural strength of the rotating cam is insufficient and prone to fatigue. When the number of impacts reaches tens of thousands or even hundreds of thousands, fatigue damage will occur. In more serious cases, it can cause cracks at the base of the rotating block, seriously affecting production safety. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the existing rotary oblique wedge mechanism that is insufficient in strength and easily causes cracking, and to provide a rotary oblique punch mechanism for automobile molds, which is equipped with a reinforcing rib structure, improves the stress state of the rotary oblique punch mechanism, greatly enhances the strength of the rotating block, and effectively prevents the rotating block from cracking.

[0005] The technical solution adopted by the present invention is: a rotary oblique punching mechanism for automobile molds, including an upper slider, a rotating block, a base and a return element, the rotating block is rotatably connected to the base, the return element is connected to the rotating block, the gap on the rotating block is provided with reinforcing ribs, the gap on the base is provided with an inclined wedge guide plate and each of the inclined wedge guide plates is provided between two adjacent reinforcing ribs, the upper slider is close to the side of the rotating block and the inclined wedge guide plate for limiting sliding. Among them, the upper slider can move relative to the rotating block or the base, which is a conventional structure in the field and will not be described here. By providing reinforcing ribs and staggering the reinforcing ribs with the inclined wedge guide plates, the height of the reinforcing ribs can be increased, thereby improving the rigidity and overall strength of the rotating block, while avoiding interference between the reinforcing ribs and the inclined wedge guide plates or the upper slider.

[0006] Furthermore, in order to improve the strength-enhancing effect of the reinforcing ribs on the rotating block, at least two reinforcing ribs are respectively arranged at both ends of the rotating block, which can provide additional support and strength, and reduce deformation or even cracking of the rotating block during the force process.

[0007] Furthermore, in order to maximize the effect of the reinforcement ribs, the number of the reinforcement ribs is five, and they are evenly arranged along the length direction of the rotating block. The five evenly distributed reinforcement ribs can maximize the dispersion and bearing of the force exerted on the rotating block during operation, reduce local stress concentration, and improve the bearing capacity and service life of the rotating block.

[0008] Furthermore, the thickness of the reinforcing rib is 0.5-1 times the thickness of the rotating block. Appropriate thickness of the reinforcing rib can ensure that the reinforcing rib provides sufficient strength without adding too much weight, while avoiding affecting the flexibility of the rotating block due to excessive thickness.

[0009] Furthermore, the cross-sectional shape of the rotating block along its length direction is crescent-shaped.

[0010] Furthermore, a vertical limit block is connected to the end of the inclined wedge guide plate away from the rotating block. The vertical limit block is arranged on the top surface (upper surface) of the inclined wedge guide plate, which can prevent the upper slider from pressing into the rotating block excessively due to the mold closing height being adjusted too low, causing the rotating block flange to be overloaded and cracked.

[0011] Furthermore, an arc-shaped guide sliding surface is provided on the base, and the arc-shaped guide sliding surface is slidably connected to the outer side surface of the rotating block. First limit blocks are respectively provided at both ends of the arc-shaped guide sliding surface, and limit grooves cooperating with the first limit blocks are respectively provided at both ends of the rotating block. This matching design can ensure that the rotating block maintains the correct position and direction during movement, prevents the rotating block from shifting or derailing, and improves the stability and reliability of the overall structure.

[0012] Furthermore, the inclined wedge guide plate is provided with a second limit block at both ends along the length direction of the base. The second limit block can further limit the movement of the upper slider, provide additional safety protection, and prevent structural damage caused by accidental impact or operational errors.

[0013] Furthermore, the return element includes a cylinder, the cylinder body is fixedly arranged on the base, and the piston rod of the cylinder is hinged to the rotating block.

[0014] Furthermore, the piston rod of the cylinder is connected with a Y-type double-section joint, a connecting rod is provided on the rotating block, and the joint pin is passed through the Y-type double-section joint and connected to the connecting rod. The design of the Y-type double-section joint allows a more flexible connection method, which can adapt to different installation angles and positions. At the same time, the connection method of the joint pin can ensure the firmness and reliability of the connection.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The staggered arrangement of the swivel block's reinforcement ribs and the wedge guide creates space for increasing the strength and quantity of the reinforcement ribs. This allows the reinforcement ribs to maximize the dispersion and bearing of the forces exerted on the swivel block during operation, reducing local stress concentration, improving the swivel block's load-bearing capacity and service life, and avoiding interference between the reinforcement ribs and the wedge guide plates during operation.

[0017] 2. A vertical limit block is set in the stamping direction to prevent the upper slider from pressing into the rotating block excessively due to the mold closing height being adjusted too low, resulting in overload and cracking of the rotating block flange. This overcomes the defect of the existing technology that the upper slider is easily pressed into excessively, causing overload and damage to the rotating block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is an exploded view of the utility model;

[0020] Figure 3 for Figure 1 Cross-sectional view at AA in the middle.

[0021] In the attached figure:

[0022] 1-upper slider; 2-rotating block; 3-base; 4-reinforcement rib; 5-wedge guide plate; 6-vertical limit block; 7-first limit block; 8-limiting groove; 9-second limit block; 10-cylinder; 11-Y-type double-section joint; 12-connecting rod; 13-connector pin. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent. Certain components in the accompanying drawings may be omitted, enlarged, or reduced in size to better illustrate the embodiments, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that certain well-known structures and their descriptions may be omitted from the accompanying drawings.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "front", "rear", "left", "right" and the like indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In addition, in the present invention, the descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" can explicitly or implicitly include at least one such feature.

[0025] Example 1

[0026] This embodiment provides a rotary oblique punching mechanism for automobile molds, referring to Figure 1 、 Figure 2 as well as Figure 3 The rotary oblique punching mechanism for automobile molds includes an upper slider 1, a rotating block 2, a base 3 and a return element. The rotating block 2 is rotatably connected to the base 3, and the return element is connected to the rotating block 2. A reinforcing rib 4 is provided in the gap on the rotating block 2, and an inclined wedge guide plate 5 is provided in the gap on the base 3, and the inclined wedge guide plate 5 is arranged between two adjacent reinforcing ribs 4. The upper slider 1 is close to the side of the rotating block 2 and the inclined wedge guide plate 5 for limiting and guiding sliding.

[0027] The upper slider 1 is provided with a moving element for driving it, and the moving element can drive the upper slider 1 downward. When the upper slider 1 slides downward until it contacts the inclined wedge guide plate 5, the inclined wedge guide plate 5 plays a limiting and guiding role, causing the upper slider 1 to move in a specific direction.

[0028] Specifically, when the oblique punching mechanism is working, the return element causes the rotating block 2 to rotate around the axis by a certain angle, so that the flanging working part of the rotating block 2 abuts against the part to be punched, and the rotation stops. Then, the upper slider 1 moves toward the part to be punched under the drive of the moving element, and works together with the flanging working part to complete the flanging of the part. After the flanging is completed, the oblique punching mechanism opens, and the return element causes the rotating block 2 to return to its initial position. At this time, the flanging working part is away from the part to be punched, and at the same time, the moving element causes the upper slider 1 to return to its initial position, so that the part can be taken out smoothly. The moving element is a reset nitrogen spring or other structures well known in the art, which will not be described in detail here.

[0029] By providing reinforcing ribs 4 and staggering the reinforcing ribs 4 with the inclined wedge guide plates 5 , the height of the reinforcing ribs 4 can be increased, thereby improving the rigidity and overall strength of the rotating block 2 while avoiding interference between the reinforcing ribs 4 and the inclined wedge guide plates 5 or the upper slider 1 .

[0030] Furthermore, a total of five reinforcing ribs 4 are provided on the rotating block 2, and the reinforcing ribs 4 are evenly arranged along the length direction of the rotating block 2, and at least two of the reinforcing ribs 4 are respectively arranged at both ends of the rotating block 2. The five evenly distributed reinforcing ribs 4 can maximize the dispersion and bearing of the force exerted on the rotating block 2 during operation, reduce local stress concentration, provide additional support and strength, reduce deformation or even cracking of the rotating block 2 during the force process, and thereby improve the bearing capacity and service life of the rotating block 2.

[0031] The existing structure usually reduces the height of the reinforcing rib 4 (most of which are 0.3 times or less of the thickness of the rotating block 2) because it needs to consider the interference problem between the reinforcing rib 4 and the inclined wedge guide 5. The reinforcing rib 4 is designed to be short and does not play much of a reinforcing role. In addition, this structure is very prone to fatigue. When the number of punches reaches tens of thousands or even hundreds of thousands, fatigue damage will occur. To solve the above problems, in this embodiment, the cross-sectional shape of the rotating block 2 along its length is crescent-shaped, and the notched part is to leave enough space for the reinforcing rib 4, the inclined wedge guide 5, the upper slider 1 and the parts to be punched. The reinforcing rib 4 is arranged at the position where the rotating block 2 forms a crescent-shaped cross-section. The thickness of the reinforcing rib 4 is 0.5 times the thickness of the rotating block 2. The appropriate thickness of the reinforcing rib 4 can ensure that the reinforcing rib 4 provides sufficient strength without adding too much weight, while avoiding affecting the flexibility of the rotating block 2 due to excessive thickness. More importantly, it avoids interference with the inclined wedge guide 5 or the upper slider 1.

[0032] Of course, in some other embodiments, the thickness of the reinforcing rib 4 may also be 0.6 times, 0.7 times, 0.8 times, 0.9 times, 1 times, or any multiple within the range of 0.5-1.0 of the thickness of the rotating block 2 .

[0033] Example 2

[0034] like Figures 1 to 3As shown, this embodiment provides another rotary oblique punching mechanism for automobile molds, including an upper slider 1, a rotating block 2, a base 3 and a return element. The rotating block 2 is rotatably connected to the base 3, and the return element is connected to the rotating block 2. A reinforcing rib 4 is provided in the gap on the rotating block 2, and an inclined wedge guide 5 is provided in the gap on the base 3. The inclined wedge guide 5 is provided between two adjacent reinforcing ribs 4. The upper slider 1 is close to the side of the rotating block 2 and the inclined wedge guide 5 for limiting and guiding sliding. The end of the inclined wedge guide 5 away from the rotating block 2 is also connected to a vertical limit block 6. The vertical limit block 6 is provided on the top surface (upper surface) of the inclined wedge guide 5 to prevent the upper slider 1 from pressing into the rotating block excessively due to the mold closing height being adjusted too low, resulting in overload and cracking of the rotating block 2 flange.

[0035] Existing solutions lack the aforementioned vertical stopper 6, making overpressure a common problem. Because the upper slider 1 is not limited, the closing height can easily be too low during operation, causing the upper slider 1 to be pushed in too deeply. As the upper slider 1 is pushed in too deeply, the force on the rotating block 2 increases dramatically, ultimately causing it to crack.

[0036] Therefore, in this embodiment, a vertical stopper 6 is connected to the end of the wedge guide plate 5 away from the rotating block 2. This prevents the upper slider 1 from pressing too far into the rotating block due to the mold closing height being adjusted too low, causing the flange of the rotating block 2 to overload and crack. The vertical stopper 6 is made of a wear-resistant material. The upper slider 1 is in direct contact with the vertical stopper 6. The wear between the two is directly borne by the vertical stopper 6, rather than the rotating block 2, thereby greatly alleviating wear on the rotating block 2.

[0037] Of course, the vertical limit block 6 is preferably connected in a detachable manner to facilitate replacement.

[0038] The return element includes a cylinder 10 , the body of the cylinder 10 is fixedly arranged on the base 3 , and the piston rod of the cylinder 10 is hinged to the rotating block 2 .

[0039] Furthermore, the piston rod of the cylinder 10 is connected to a Y-type double-section joint 11, a connecting rod 12 is provided on the rotating block 2, and a joint pin 13 is passed through the Y-type double-section joint 11 and connected to the connecting rod 12. The design of the Y-type double-section joint 11 allows a more flexible connection method, which can adapt to different installation angles and positions. At the same time, the connection method of the joint pin 13 can ensure the firmness and reliability of the connection.

[0040] After adopting the above structure, when it is necessary to realize the rotation or reset of the rotating block 2, the cylinder 10 moves, and its piston rod will drive the Y-type double-section joint 11, and the Y-type double-section joint 11 is hinged to the connecting rod 12 through the joint pin 13, thereby driving the rotating block 2 to rotate. When the piston rod reaches the maximum stroke, the rotating block 2 also reaches one end of its rotation stroke. Conversely, when the piston rod retracts, the rotating block 2 also rotates toward the other end until it reaches the end of the stroke. It can be understood that this solution drives the rotating block 2 through the cylinder 10 (piston rod), so that the rotation amount of the rotating block 2 can be precisely controlled, and the shaping accuracy of the workpiece is improved accordingly.

[0041] Example 3

[0042] See Figure 1 as well as Figure 2 This embodiment, based on the first or second embodiment, provides another rotary oblique punching mechanism for automobile molds. In addition to the disclosed upper slider 1, rotating block 2, base 3, return element, oblique wedge guide plate 5 and / or vertical limit block 6, in this embodiment, an arc-shaped guide sliding surface is provided on the base 1, and the arc-shaped guide sliding surface is slidably connected to the outer side surface of the rotating block 2. First limit blocks 7 are respectively provided at both ends of the arc-shaped guide sliding surface, and limit grooves 8 that cooperate with the first limit blocks 7 are respectively provided at both ends of the rotating block 2. When the limit groove 8 rotates with the rotating block 2, it will abut against the first limit block 7. The first limit block 7 blocks the continued rotation of the rotating block 2, and then provides a rotation-limiting effect for the rotation of the rotating block 2. This matching design can better control the rotation amount of the rotating block 2, ensure that the rotating block 2 maintains the correct position and direction during the movement, prevent the rotating block 2 from excessive rotation, or the rotating block 2 from deviating or derailing, and improve the stability and reliability of the overall structure.

[0043] The inclined wedge guide plate 5 is provided with a second limit block 9 at both ends along the length direction of the base 3. The second limit block 9 can further limit the movement of the upper slider 1, providing additional safety protection to prevent structural damage caused by accidental impact or operational errors.

[0044] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A rotary oblique punching mechanism for automobile molds, comprising an upper slider (1), a rotating block (2), a base (3) and a return element, wherein the rotating block (2) is rotatably connected to the base (3), and the return element is connected to the rotating block (2), characterized in that: A reinforcing rib (4) is provided in the gap on the rotating block (2), an inclined wedge guide plate (5) is provided in the gap on the base (3), and the inclined wedge guide plate (5) is arranged between two adjacent reinforcing ribs (4); the upper slider (1) is close to the side of the rotating block (2) and the inclined wedge guide plate (5) for limiting and guiding sliding.

2. The rotary oblique punching mechanism for automobile mold according to claim 1, characterized in that: At least two of the reinforcing ribs (4) are respectively arranged at two ends of the rotating block (2).

3. The rotary oblique punching mechanism for automobile mold according to claim 2, characterized in that: The number of the reinforcing ribs (4) is five, and they are evenly arranged along the length direction of the rotating block (2).

4. The rotary oblique punching mechanism for automobile mold according to claim 3, characterized in that: The thickness of the reinforcing rib (4) is 0.5-1 times the thickness of the rotating block (2).

5. The rotary oblique punching mechanism for automobile mold according to any one of claims 1 to 4, characterized in that: The cross-sectional shape of the rotating block (2) along its length direction is crescent-shaped.

6. The rotary oblique punching mechanism for automobile mold according to claim 5, characterized in that: One end of the inclined wedge guide plate (5) away from the rotating block (2) is also connected to a vertical limiting block (6).

7. The rotary oblique punching mechanism for automobile mold according to claim 1, characterized in that: The base (3) is provided with an arc-shaped guide sliding surface, the arc-shaped guide sliding surface is slidably connected to the outer side surface of the rotating block (2), and first limit blocks (7) are respectively provided at both ends of the arc-shaped guide sliding surface, and limit grooves (8) that cooperate with the first limit blocks (7) are respectively provided at both ends of the rotating block (2).

8. The rotary oblique punching mechanism for automobile mold according to claim 1, characterized in that: The two ends of the inclined wedge guide plate (5) along the length direction of the base (3) are respectively provided with second limiting blocks (9).

9. The rotary oblique punching mechanism for automobile mold according to claim 1, characterized in that: The return element comprises a cylinder (10), the body of the cylinder (10) is fixedly arranged on the base (3), and the piston rod of the cylinder (10) is hinged to the rotating block (2).

10. The rotary oblique punching mechanism for automobile mold according to claim 9, characterized in that: The piston rod of the cylinder (10) is connected with a Y-shaped double-joint joint (11), the rotating block (2) is provided with a connecting rod (12), and a joint pin (13) is passed through the Y-shaped double-joint joint (11) and connected with the connecting rod (12).

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