Bending mechanism for precise rotary forming movement

Abstract

The utility model discloses a bending mechanism capable of precisely rotating, forming and moving, which relates to the technical field of dies and comprises a male die component, a pressure plate and two female die components, the male die component is mounted on a lower die of the die, and the pressure plate and the two female die components are mounted on an upper die of the die; the male die assembly comprises a male die fixing base, male die inserts are arranged on the two sides of the male die fixing base respectively, the top faces of the male die inserts are used for containing workpieces, and the outer sides of the top faces of the male die inserts extend outwards to form forming parts. The material pressing plate is used for pressing the workpiece; the two female die assemblies are located above the corresponding male die inserts respectively, each female die assembly comprises a female die fixing base, a columnar rotating female die is horizontally and rotatably arranged at the bottom of each female die fixing base, and a forming groove matched with the forming part is formed in the rolling face of each columnar rotating female die.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically a bending mechanism for precision rotary forming motion. Background Technology

[0002] High-precision rotary bending mechanisms are mechanical devices that can precisely control rotation and bending actions, ensuring processing accuracy and quality. They are widely used in sheet metal forming parts for automobiles, electrical appliances, and other industries. Due to the high strength of the sheet metal and the precision required of the products, the forming process demands even higher precision, requiring extremely compact design and high efficiency from the processing equipment.

[0003] In conventional design schemes, forward flanging and wedge flanging mechanisms are generally used to achieve the flanging and bending process of parts. To ensure the quality of the parts, the flanging and bending process may be implemented in multiple steps when necessary. Ordinary wedge flanging structures occupy a large space. Due to limitations such as small product size and progressive die production methods in product mold development, how to solve the problem of insufficient mold design space, the large processing force required for high-strength plate production, and the high requirements for product quality stability are all urgent issues that need to be addressed. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a precision rotary forming bending mechanism. Through the application of this mechanism in a progressive die, the design and manufacturing of automotive part molds can be successfully achieved. Due to the ingenious structure of the bending mechanism, it occupies little space, making the stamping process more rational and reducing design difficulties. Because the rotary bending mechanism can adjust the rotation angle in multiple dimensions, and the bending punch is adjustable, it greatly facilitates product debugging and quality improvement, reducing debugging cycles and costs. It also improves the efficiency of parts production equipment. Due to the simple bending structure and rotary forming, the force required to bend the parts is small, resulting in higher consistency in the forming state. It is applicable to a wide range of molds, has a long service life, and low maintenance costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a bending mechanism for precision rotary forming motion, comprising a punch assembly, a pressure plate, and two die assemblies. The punch assembly is installed on the lower die, and the pressure plate and the two die assemblies are installed on the upper die. The punch assembly includes a punch fixing seat, and punch inserts are respectively provided on both sides of the punch fixing seat. The top surface of the punch insert is used to place the workpiece, and the outer side of the top surface of the punch insert extends outward to form a forming part. The pressure plate is used to press the workpiece. The two die assemblies are respectively located above the corresponding punch inserts. The die assemblies include a die fixing seat, and a columnar rotating die is horizontally rotatably provided at the bottom of the die fixing seat, and the rolling surface of the columnar rotating die is provided with a forming groove adapted to the forming part.

[0006] A further improvement is that the forming groove has a fan-shaped structure, and the inner protrusion of the forming groove is located above the punch insert, while the outer protrusion of the forming groove is located outside the punch insert.

[0007] A further improvement is that a semi-circular limiting groove is provided on the inner side of the bottom of the die fixing seat, the columnar rotating die is rotatably set in the limiting groove, and the part of the columnar rotating die located outside the limiting groove is provided with a forming groove.

[0008] A further improvement is that a limiting block is provided on the outer bottom of the die fixing seat, and a limiting surface adapted to the cylindrical rotating die is provided on the inner side of the limiting block.

[0009] A further improvement is that the outer side of the die fixing seat is provided with a channel communicating with the limiting groove, and a reset device adapted to the cylindrical rotating die is provided in the channel.

[0010] A further improvement is that the reset device includes a reset rod, a screw plug, and a spring disposed between the reset rod and the screw plug.

[0011] A further improvement is that the inner end of the reset rod is provided with a supporting part, and the outer end of the reset rod is provided with a limit guide rod.

[0012] A further improvement is that the rolling surface of the cylindrical rotating die is provided with a limiting groove that is adapted to the reset ejector pin, and grease is added to the limiting groove.

[0013] A further improvement is that an adjustable shim is provided on the top of the die fixing seat.

[0014] A further improvement is that the punch holder includes a base plate, the middle of which protrudes upward to form a boss, the top surface of which is flush with the top surface of the punch insert for placing the workpiece; an installation space for installing the punch insert is formed between the side of the boss and the base plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model relates to a rotary bending forming mechanism for high-strength steel plate and aluminum parts requiring single-sided or double-sided flanging bending, where the forming process has a tight step distance, high springback during bending, high precision requirements, and short flanging distance. Compared to conventional designs, the rotary bending structure is more compact, requiring less force to bend the parts. It also results in higher consistency in the formed state, a wider range of applicable molds, longer mold life, and lower maintenance costs. Furthermore, it improves mold stability, makes the mold structure more compact, and facilitates automated design.

[0017] 2. This utility model provides valuable and practical experience for the development of similar parts. It creates economic value, replaces imported molds, and brings significant economic and social benefits to the mold industry. Attached Figure Description

[0018] Figure 1 This is a perspective view of the bending mechanism for precision rotary forming motion in an embodiment of this utility model;

[0019] Figure 2 This is a top view of the bending mechanism for precision rotary forming motion in an embodiment of this utility model;

[0020] Figure 3 for Figure 2 Sectional view along the middle AA direction;

[0021] Figure 4 This is a schematic diagram of the structure of the punch fixing seat in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the punch insert in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the die fixing seat in the embodiment of this utility model;

[0024] Figure 7 This is a schematic diagram of the cylindrical rotating die in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the reset device in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram illustrating the working principle of the bending mechanism for precision rotary forming motion in this embodiment of the present invention.

[0027] Figure label:

[0028] 1-Punch assembly; 11-Punch holder; 111-Base plate; 112-Boss; 113-Mounting space; 12-Punch insert; 121-Forming part;

[0029] 2-Pressure plate;

[0030] 3-Die assembly; 31-Die fixing seat; 311-Limiting groove; 312-Channel; 313-Limiting block; 314-Limiting surface; 315-Adjustable shim; 32-Columnar rotating die; 321-Forming groove; 322-Inner protrusion; 323-Outer protrusion; 33-Reset device; 331-Reset ejector rod; 332-Screw plug; 333-Spring; 334-Holding part; 335-Limiting guide rod. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0032] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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 be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0033] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0034] See Figures 1-3 As shown, this utility model embodiment provides a bending mechanism for precision rotary forming motion, including a punch assembly 1, a pressure plate 2 and two die assemblies 3. The punch assembly 1 is installed on the lower die, and the pressure plate 2 and the two die assemblies 3 are installed on the upper die.

[0035] See Figure 4 and Figure 5 As shown, the punch assembly 1 includes a punch fixing seat 11, and punch inserts 12 are respectively provided on both sides of the punch fixing seat 11. The top surface of the punch insert 12 is used to place the workpiece, and the outer side of the top surface of the punch insert 12 extends outward to form a forming part 121. Specifically, the punch fixing seat 11 includes a base plate 111, and the middle part of the base plate 111 protrudes upward to form a boss 112. The top surface of the boss 112 is flush with the top surface of the punch insert 12 and is used to place the workpiece. An installation space 113 for installing the punch insert 12 is formed between the side of the boss 112 and the base plate 111.

[0036] Pressure plate 2 is used to clamp the workpiece;

[0037] See Figure 6 and Figure 7As shown, the two die assemblies 3 are respectively located above the corresponding punch inserts 12. The die assembly 3 includes a die fixing seat 31. A columnar rotating die 32 is horizontally rotatably disposed at the bottom of the die fixing seat 31, and the rolling surface of the columnar rotating die 32 is provided with a forming groove 321 adapted to the forming part 121. Specifically, the forming groove 321 has a fan-shaped structure, and the inner protrusion 322 of the forming groove 321 is located above the punch insert 12, while the outer protrusion 323 of the forming groove 321 is located outside the punch insert 12. A semi-circular limiting groove 311 is provided on the inner side of the bottom of the die fixing seat 31. The columnar rotating die 32 is rotatably disposed in the limiting groove 311, and the portion of the columnar rotating die 32 outside the limiting groove 311 is provided with the forming groove 321. A limiting block 313 is provided on the outer bottom of the die fixing base 31, and a limiting surface 314 adapted to the cylindrical rotating die 32 is provided on the inner side of the limiting block 313. Specifically, an adjustable shim 315 is provided on the top of the die fixing base 31.

[0038] See Figure 6 and Figure 8 As shown, the outer surface of the die holder 31 is provided with a channel 312 communicating with the limiting groove 311. A reset device 33 adapted to the cylindrical rotating die 32 is provided within the channel 312. Specifically, the reset device 33 includes a reset ejector rod 331, a screw plug 332, and a spring 333 disposed between the reset ejector rod 331 and the screw plug 332. The inner end of the reset ejector rod 331 is provided with a supporting portion 334, and the outer end of the reset ejector rod 331 is provided with a limiting guide rod 335. The rolling surface of the cylindrical rotating die 32 is provided with a limiting groove adapted to the reset ejector rod 331, and grease is added to the limiting groove to reduce friction during rotation and improve accuracy.

[0039] The working principle of this utility model is as follows:

[0040] See Figure 9 As shown, in the mold-open state, the part from the previous process is moved in and placed on the punch insert. As the upper die descends, the upper die pressure plate presses down on the upper surface of the part. During the continued descent of the mold, the two protrusions of the rotating die contact the sheet metal. Because the sheet metal contacted by the inner protrusions is supported by the punch below, the rotating die rotates, converting the positive pressure into lateral pressure. This causes the sheet metal to bend along the punch forming section, achieving part bending. During this process, the return ejector and spring are compressed by the rotating cylindrical die. In the mold-open, upward-moving state, the spring releases pressure, and the return ejector pushes against the rotating cylindrical die, causing it to rotate in the opposite direction and return to the reset state.

[0041] This utility model relates to a rotary bending forming mechanism for high-strength steel plate and aluminum parts requiring single-sided or double-sided flanging bending, characterized by tight forming process steps, large bending springback, high precision requirements, and short flanging distances. It is applied in conjunction with a progressive die production line. The produced parts are manufactured in one stroke, producing four sets of parts. The tight die step-off and small space result in high production efficiency. The part material is a high-strength plate with a thickness of 1.5mm and a tensile strength of 920MPa. The product exhibits significant flanging springback. The flanging structure must be adjustable, stable, and possess high strength. The mechanism utilizes a rotatable cylindrical die, transferring the positive pressure from the press to the bending direction through the rotating cylindrical die. A pressure plate presses the product from above, and the rotating die contacts the area requiring flanging, thus achieving the bending process. Due to its simple bending structure and rotary forming, the force required to bend the parts is low, resulting in higher consistency in the forming state. It has a wide range of applicable molds, a long service life, and low maintenance costs. It improves mold stability, makes the mold structure more compact, and facilitates automated design.

[0042] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions made using techniques known in the art based on this utility model all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A bending mechanism for precision rotary forming motion, comprising a punch assembly (1), a pressure plate (2), and two die assemblies (3), wherein the punch assembly (1) is mounted on the lower die, and the pressure plate (2) and the two die assemblies (3) are mounted on the upper die; characterized in that: The punch assembly (1) includes a punch fixing seat (11), and punch inserts (12) are respectively provided on both sides of the punch fixing seat (11). The top surface of the punch insert (12) is used to place the workpiece, and the outer side of the top surface of the punch insert (12) extends outward to form a forming part (121). The pressure plate (2) is used to press the workpiece; Two die assemblies (3) are located above the corresponding punch inserts (12). The die assembly (3) includes a die fixing seat (31). A columnar rotating die (32) is horizontally rotatably provided at the bottom of the die fixing seat (31), and the rolling surface of the columnar rotating die (32) is provided with a forming groove (321) that is adapted to the forming part (121).

2. The bending mechanism for precision rotary forming motion according to claim 1, characterized in that: The forming groove (321) has a fan-shaped structure, and the inner protrusion (322) of the forming groove (321) is located above the punch insert (12), while the outer protrusion (323) of the forming groove (321) is located outside the punch insert (12).

3. The bending mechanism for precision rotary forming motion according to claim 1, characterized in that: The bottom inner side of the die fixing seat (31) is provided with a semi-circular limiting groove (311), the columnar rotating die (32) is rotatably disposed in the limiting groove (311), and the part of the columnar rotating die (32) located outside the limiting groove (311) is provided with a forming groove (321).

4. The bending mechanism for precision rotary forming motion according to claim 3, characterized in that: The bottom outer side of the die fixing seat (31) is provided with a limiting block (313), and the inner side of the limiting block (313) is provided with a limiting surface (314) that is adapted to the columnar rotating die (32).

5. The bending mechanism for precision rotary forming motion according to claim 3, characterized in that: The outer side of the die fixing seat (31) is provided with a channel (312) communicating with the limiting groove (311), and a reset device (33) adapted to the cylindrical rotating die (32) is provided in the channel (312).

6. The bending mechanism for precision rotary forming motion according to claim 5, characterized in that: The reset device (33) includes a reset push rod (331), a screw plug (332), and a spring (333) disposed between the reset push rod (331) and the screw plug (332).

7. The bending mechanism for precision rotary forming motion according to claim 6, characterized in that: The inner end of the reset rod (331) is provided with a supporting part (334), and the outer end of the reset rod (331) is provided with a limiting guide rod (335).

8. The bending mechanism for precision rotary forming motion according to claim 6, characterized in that: The rolling surface of the cylindrical rotating die (32) is provided with a limiting groove that is adapted to the reset ejector pin (331), and grease is added to the limiting groove.

9. The bending mechanism for precision rotary forming motion according to claim 1, characterized in that: An adjustable shim (315) is provided on the top of the die fixing seat (31).

10. The bending mechanism for precision rotary forming motion according to claim 1, characterized in that: The punch holder (11) includes a base plate (111), the middle of which protrudes upward to form a boss (112). The top surface of the boss (112) is flush with the top surface of the punch insert (12) and is used to place the workpiece. An installation space (113) for installing the punch insert (12) is formed between the side of the boss (112) and the base plate (111).

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