A bending angle correction structure for a mold

Abstract

The utility model discloses a kind of bending angle correction structure for mould, comprising: punch, lower mould support insert, lower mould slider and first reset element, punch is set on upper die and moves with upper die, first drive inclined plane is opened in the side of punch close to lower mould, lower mould slider is slidably engaged with lower mould, second drive inclined plane is opened in the side of lower mould slider away from metal piece, and it is slidably engaged with first drive inclined plane, lower mould support insert is fixedly arranged on lower mould for supporting metal piece, and it is oppositely arranged with lower mould slider to form correction space, first reset element is arranged in the side of lower mould slider close to lower mould support insert, for when opening mould, drive lower mould slider to move reset away from lower mould support insert;By the above mode, the utility model can solve the problem that product bending angle is out of tolerance and cannot be accurately controlled due to material rebound in traditional bending process.

Description

Technical Field

[0001] This utility model relates to the field of metal stamping forming die technology, and in particular to a bending angle correction structure for a die. Background Technology

[0002] In the field of metal stamping, especially when processing metal parts from strip using progressive dies, bending at a specified angle, such as a 90° bend, is a very common forming process. The accuracy of the bending angle directly determines the dimensional quality and assembly performance of the product.

[0003] Currently, the traditional 90° bending process in the industry is usually completed in one go at a single workstation. The principle of this method is that the upper die punch and the lower die V-groove or multiple sets of punches gradually bend the metal part at the bending point, or similar structures cooperate with each other, applying pressure to the metal part and making it bend to the predetermined angle instantly.

[0004] However, in actual production, due to the inherent springback characteristics of metal materials, machining errors of mold parts, and wear during long-term production, the traditional one-time bending method has significant technical defects: the bent metal parts often cannot consistently achieve a precise 90° bending angle, but instead generally exhibit an undesirable "outward flare" (i.e., an angle greater than 90°). This angular deviation leads to non-compliant product dimensions, causing problems in subsequent assembly or use, and seriously affecting the quality stability and yield of the final product. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a bending angle correction structure for molds, which can solve the problem that the bending angle of the product is out of tolerance and cannot be accurately controlled due to material springback in traditional bending processes.

[0006] To solve the above-mentioned technical problems, the present invention provides a bending angle correction structure for a mold, comprising: a punch, a lower mold support insert, a lower mold slider, and a first reset element. The punch is disposed on the upper mold and moves with the upper mold. A first driving inclined surface is provided on the side of the punch near the lower mold. The lower mold slider slides in cooperation with the lower mold. A second driving inclined surface is provided on the side of the lower mold slider away from the metal part, which slides in cooperation with the first driving inclined surface. The lower mold support insert is fixedly disposed on the lower mold to support the metal part and is disposed opposite to the lower mold slider to form a correction space. The first reset element is disposed on the side of the lower mold slider near the lower mold support insert and is used to drive the lower mold slider away from the lower mold support insert to move and reset when the mold is opened. When the mold is closed, the first driving inclined surface of the punch interacts with the second driving inclined surface of the lower mold slider, driving the lower mold slider to overcome the force of the first reset element and slide towards the lower mold support insert to impact and correct the bending angle of the metal part located in the correction space. When the mold is opened, the punch moves upward, thereby the first reset element drives the lower mold slider to reset.

[0007] Preferably, the upper die is connected to an adjusting rod via an adjusting screw. The adjusting rod has a first adjusting slope on the side facing the punch, and the punch has a second adjusting slope that mates with the first adjusting slope at the end near the adjusting rod. One end of the adjusting screw is threaded to the upper die. By rotating the adjusting screw, the contact position between the first adjusting slope and the second adjusting slope is adjusted, thereby adjusting the position of the punch relative to the lower die.

[0008] Preferably, the adjusting rod is threaded with a fastening screw, one end of which abuts against the adjusting screw to further stabilize the connection between the adjusting rod and the adjusting screw.

[0009] Preferably, the punch is connected to a second reset element, and the upper die is connected to a pressure plate. The two ends of the second reset element abut against the punch and the pressure plate respectively, thereby providing the punch with a force toward the adjusting rod.

[0010] Preferably, a punch extends from one end of the lower die slider near the lower die support insert. When the die is closed, the punch abuts against the bent part of the metal part to correct the bending angle of the metal part.

[0011] Preferably, the lower mold has a groove, and the lower mold slider slides in cooperation with the groove.

[0012] The beneficial effects of this invention are as follows: By driving the lower die slider to impact the workpiece through the inclined plane of the punch, the bending angle of the metal part is actively and forcibly corrected. This effectively overcomes the angle deviation problem caused by material springback, such as "outward expansion," thus ensuring the high precision and stability of the product bending angle and greatly improving product quality and pass rate. Simultaneously, operators can steplessly adjust the final stroke and correction force of the lower die slider by simply rotating the adjusting screw, giving the mold process adaptability and enabling it to flexibly handle workpieces of different materials and thicknesses, easily achieving precision bending of various specific angles from 90° to 80°, 70°, etc. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model in the mold-open state; Figure 2 yes Figure 1 Enlarged diagram of section A in the middle; Figure 3 This is a schematic diagram of the overall structure of the present invention in the mold-closed state; Figure 4 This is a schematic diagram showing the positional relationship between the adjusting rod, punch, and lower die slider of this utility model; Figure 5 This is an exploded view of the adjusting rod, punch, and lower die slider of this utility model.

[0014] The components in the attached diagram are labeled as follows: 1. Punch; 2. Lower die support insert; 3. Lower die slider; 4. First reset element; 5. First drive ramp; 6. Second drive ramp; 7. Correction space; 8. Adjusting screw; 9. Adjusting rod; 10. First adjusting ramp; 11. Second adjusting ramp; 12. Fastening screw; 13. Second reset element; 14. Pressure plate; 15. Wear-resistant stop block; 16. Metal part; 17. Punch. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0020] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0022] Example: refer to Figures 1-5 A bending angle correction structure for a mold includes: a punch 1, a lower mold support insert 2, a lower mold slider 3, and a first reset element 4. The punch 1 is arranged on the upper mold and moves up and down with the upper mold during mold opening and closing. A first driving inclined surface 5 is provided on the side of the punch 1 closest to the lower mold. The lower mold slider 3 slides with the lower mold and can be provided with a groove in the lower mold, so that the lower mold slider 3 slides with the groove. A second driving inclined surface 6 is provided on the side of the lower mold slider 3 away from the metal part 16, which slides with the first driving inclined surface 5. The lower mold support insert 2 is fixedly installed on the lower mold to support the metal part 16 and is arranged opposite to the lower mold slider 3 to form a correction space 7 into which the bending part of the metal part 16 can be inserted. The first reset element 4 is arranged on the side of the lower mold slider 3 closest to the lower mold support insert 2, so as to drive the lower mold slider 3 away from the lower mold support insert 2 to reset during mold opening. The first reset element 4 can be a spring. To stabilize the position between the first reset element 4 and the lower die slider 3, a spring groove can be opened on the lower die slider 3, so that one end of the first reset element 4 extends into the spring groove and abuts against the lower die slider 3. When the mold is closed, the first driving inclined surface 5 of the punch 1 interacts with the second driving inclined surface 6 of the lower die slider 3, thereby driving the lower die slider 3 to overcome the force of the first reset element 4 and slide towards the lower die support insert 2, so as to impact and correct the bending angle of the metal part 16 located in the correction space 7. When the mold is opened, the punch 1 moves upward under the drive of the upper die, thereby driving the lower die slider 3 to reset and move away from the lower die support insert without affecting the advance of the strip.

[0023] refer to Figures 1-5To adjust the stroke range of the punch 1 driving the lower die slider 3 during mold closing, thereby adjusting the bending degree of the lower die slider 3 on the metal part 16, the upper die is connected to an adjusting rod 9 via an adjusting screw 8. The adjusting rod 9 has a first adjusting slope 10 on the side facing the punch 1, and a second adjusting slope 11 that mates with the first adjusting slope 10 is located at the end of the punch 1 near the adjusting rod 9. The maximum position of the punch 1's movement away from the lower die is adjusted by the contact position of the first adjusting slope 10 and the second adjusting slope 11, thus adjusting the maximum distance of the lower die slider 3 towards the lower die support insert 2, facilitating the adjustment of the bending angle of the metal part 16. One end of the adjusting screw 8 is threadedly connected to the upper die. Rotating the adjusting screw 8 adjusts the contact position of the first adjusting slope 10 and the second adjusting slope 11, thereby adjusting the position of the punch 1 relative to the lower die. A fastening screw 12 is threadedly connected to the adjusting rod 9, with one end of the fastening screw 12 abutting against the adjusting screw 8 to further stabilize the connection between the adjusting rod 9 and the adjusting screw 8.

[0024] refer to Figures 1-5 The punch 1 is connected to a second reset element 13, which can be a spring. A pressure plate 14 is screwed to the upper die. Both ends of the second reset element 13 abut against the punch 1 and the pressure plate 14 respectively, thus the pressure plate 14 provides support for the second reset element 13. Consequently, the second reset element 13 provides a force to the punch 1 towards the adjusting rod 9, ensuring that the end of the punch 1 with the second adjusting slope 11 is always tightly fitted with the end of the adjusting rod 9 with the first adjusting slope 10. To stabilize the position between the second reset element 13 and the punch 1, a spring hole can be provided on the punch 1, with one end of the second reset element 13 abutting against the spring hole.

[0025] refer to Figures 1-5 To more stably impact and bend the metal part 16 to a specified angle, a punch 17 extends from the end of the lower die slide 3 near the lower die support insert 2. When the mold is closed, the punch 17 abuts against the bent portion of the metal part 16 to correct the bending angle. Considering the springback characteristics of the metal part 16, the side of the lower die support insert 2 supporting the bent portion of the metal part 16 can be inclined inward at a certain angle, so that when the bent portion of the metal part 16 springs back to a specified angle, such as 90°, and the metal part 16 can be bent to other required angles, such as 80°, 70°, etc., by controlling the stroke range of the lower die slide 3. To increase the service life of the mold, a wear-resistant stop 15 can be installed at the end of the slide away from the lower die support insert 2.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A bending angle correction structure for a mold, characterized in that, include: The components include a punch (1), a lower die support insert (2), a lower die slider (3), and a first reset element (4). The punch (1) is mounted on the upper die and moves with the upper die. The punch (1) has a first driving inclined surface (5) on the side near the lower die. The lower mold slider (3) is slidably engaged with the lower mold, and a second driving inclined surface (6) is provided on the side of the lower mold slider (3) away from the metal part (16) to slidably engage with the first driving inclined surface (5). The lower mold support insert (2) is fixedly mounted on the lower mold to support the metal part (16), and is positioned opposite to the lower mold slider (3) to form a correction space (7). The first reset element (4) is disposed on the side of the lower mold slider (3) near the lower mold support insert (2), and is used to drive the lower mold slider (3) away from the lower mold support insert (2) to move and reset when the mold is opened. When the mold is closed, the first driving inclined surface (5) of the punch (1) interacts with the second driving inclined surface (6) of the lower mold slider (3), driving the lower mold slider (3) to overcome the force of the first reset element (4) and slide towards the lower mold support insert (2) to impact and correct the bending angle of the metal part (16) located in the correction space (7); When the mold is opened, the punch (1) moves upward, thereby causing the first reset element (4) to drive the lower mold slider (3) to reset.

2. The bending angle correction structure for a mold according to claim 1, characterized in that: The upper die is connected to an adjusting rod (9) via an adjusting screw (8). The adjusting rod (9) has a first adjusting slope (10) on the side facing the punch (1). The punch (1) has a second adjusting slope (11) that cooperates with the first adjusting slope (10) at the end near the adjusting rod (9). One end of the adjusting screw (8) is threaded to the upper die. By rotating the adjusting screw (8), the contact position between the first adjusting slope (10) and the second adjusting slope (11) is adjusted, thereby adjusting the position of the punch (1) relative to the lower die.

3. The bending angle correction structure for a mold according to claim 2, characterized in that: The adjusting rod (9) is threaded with a fastening screw (12), one end of which abuts against the adjusting screw (8) to further stabilize the connection between the adjusting rod (9) and the adjusting screw (8).

4. A bending angle correction structure for a mold according to claim 2 or 3, characterized in that: The punch (1) is connected to a second reset element (13), and the upper die is connected to a pressure plate (14). The two ends of the second reset element (13) abut against the punch (1) and the pressure plate (14) respectively, thereby providing the punch (1) with a force toward the adjusting rod (9).

5. The bending angle correction structure for a mold according to claim 1, characterized in that: The lower die slider (3) has a punch (17) extending from one end near the lower die support insert (2). When the die is closed, the punch (17) abuts against the bent part of the metal part (16) to correct the bending angle of the metal part (16).

6. A bending angle correction structure for a mold according to claim 1 or 5, characterized in that: The lower mold has a sliding groove, and the lower mold slider (3) slides in conjunction with the sliding groove.

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