A bending and flattening die

Abstract

This utility model relates to a bending and flattening mold, including an upper mold module and a lower mold module. The lower surface of the upper mold module is provided with a flattening surface for flattening the workpiece. The lower mold module is provided with a mounting groove, in which a fixing block and a longitudinally sliding tube position float are provided, and a stripping ejector pin assembly is provided to provide elastic force to the tube position float. The fixing block is provided with a first positioning groove for positioning the front end of the bent part of the workpiece, and the tube position float is provided with a second positioning groove connected to the first positioning groove and a positioning protrusion for positioning the rear end of the bent part of the workpiece. The mold has a simple structure. When the mold is opened, the bottom surface of the second positioning groove is higher than the bottom surface of the first positioning groove; when the mold is closed, the bottom surfaces of the first positioning groove and the second positioning groove are on the same plane, which facilitates the subsequent flattening of the bent part. The inner surface of the first positioning groove and the positioning protrusion work together to achieve precise positioning of the front and rear ends of the bent part of the workpiece, and the flattening operation is completed by the flattening surface, effectively preventing stripping and improving processing accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of workpiece punching molds, and more specifically, to a bending and flattening mold. Background Technology

[0002] In the processing of hardware parts, it is often necessary to bend the workpiece and then flatten it to meet specific structural and dimensional requirements. Currently, such as Figure 1 As shown, commonly used bending and flattening dies typically include an upper die assembly and a lower die assembly. The lower die assembly is provided with a forming block, and the forming block is provided with a positioning groove for the workpiece bending part to be placed horizontally. The bottom surface of the positioning groove is a plane, which is used to provide support during the flattening process.

[0003] However, in practical use, existing molds only position the front end of the workpiece's bending section using the forming block, lacking effective constraint on the rear end. When the upper mold assembly presses down, the workpiece is prone to shifting backward due to uneven force, causing material stripping and resulting in product dimensional deviations, affecting product quality. Furthermore, this type of material stripping problem is difficult to control during debugging, increasing operational difficulty and reducing production efficiency and mold stability.

[0004] Therefore, there is an urgent need for a bending and flattening mold with a reasonable structure and reliable positioning to effectively solve the problems of unstable positioning and material stripping during the flattening process, and improve processing accuracy and production efficiency. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a bending and flattening mold.

[0006] To achieve the above objectives, the technical problem to be solved by this utility model is to provide a bending and flattening mold that addresses the aforementioned deficiencies of the prior art.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a bending and flattening mold, comprising an upper mold module and a lower mold module; the lower surface of the upper mold module is provided with a flattening surface for flattening the workpiece; the lower mold module is provided with a mounting groove, a fixing block is provided in the mounting groove, and a tube position float that cooperates with the fixing block and can slide longitudinally; the lower mold module is provided with a stripping ejector assembly for providing vertical elastic force to the tube position float; the fixing block is provided with a first positioning groove facing the tube position float for positioning the front end of the bent part of the workpiece; the upper surface of the tube position float is provided with a second positioning groove communicating with the first positioning groove, and a positioning protrusion provided in the second positioning groove for positioning the rear end of the bent part of the workpiece. When the upper mold module and the lower mold module open, the tube position float is in the first position, and the inner bottom surface of the second positioning groove is higher than the inner bottom surface of the first positioning groove. When the upper mold module and the lower mold module are closed, the tube position float is driven to the second position. The inner bottom surface of the first positioning groove and the inner bottom surface of the second positioning groove are on the same plane. The inner side surface of the first positioning groove and the positioning protrusion work together to achieve precise positioning of the front and rear ends of the workpiece bending part.

[0008] In the bending and flattening mold of this utility model, one of the fixed block and the tube position floating block has a Z-direction sliding groove on its outer surface, and the other has a sliding protrusion that is slidably connected to the Z-direction sliding groove on its outer surface.

[0009] In the bending and flattening mold of this utility model, the sum of the length of the first positioning groove and the length of the second positioning groove is equal to the length of the bent portion of the workpiece after flattening.

[0010] The bending and flattening mold of this utility model includes a stripping ejector assembly disposed below the mounting groove; the stripping ejector assembly includes a stripping ejector that extends vertically into the mounting groove to lift the tube position float, and a first return spring that provides elastic force to the stripping ejector; the lower mold module is provided with a first receiving groove that communicates with the mounting groove and accommodates the stripping ejector assembly.

[0011] In the bending and flattening mold of this utility model, when the upper mold module and the lower mold module open, when the tube position float moves to the first position, the upper surface of the tube position float is not higher than the upper surface of the upper mold module.

[0012] In the bending and flattening mold of this utility model, when the upper mold module and the lower mold module are closed, when the tube position float block moves to the second position, at least a portion of the upper end of the fixed block protrudes from the upper surface of the upper mold module; the upper mold module is provided with a clearance groove to avoid the fixed block.

[0013] The bending and flattening mold of this utility model includes a lower mold module comprising a lower mold base, a lower pad plate fixedly connected to the lower mold base, and a lower ejector plate movably disposed above the lower pad plate; a second return spring is provided between the lower ejector plate and the lower pad plate; and a second receiving groove is provided on the lower pad plate to accommodate the second return spring.

[0014] In the bending and flattening mold of this utility model, the first receiving groove and the second receiving groove are respectively located on the left and right sides of the lower mold module.

[0015] In the bending and flattening mold of this utility model, the first positioning groove and the Z-direction sliding groove are respectively located at both ends of the same side of the tube position float.

[0016] The beneficial effects of this utility model are as follows: The bending and flattening mold is ingeniously designed. By setting a fixed block and a longitudinally sliding tube position float in the lower mold module, and setting a first positioning groove on the fixed block for positioning the front end of the bent part of the workpiece, and a second positioning groove connected to the first positioning groove and a positioning protrusion for positioning the rear end of the bent part of the workpiece on the tube position float, synchronous and precise positioning of the front and rear ends of the bent part of the workpiece is achieved. In the mold-closed state, the bottom surfaces of the first positioning groove and the second positioning groove are located on the same plane. The flattening plane flattens the bent part of the workpiece through the upper mold module, effectively preventing the workpiece from shifting backward and slipping off due to uneven force during the flattening process, thereby significantly improving the product dimensional accuracy, processing stability and production efficiency. This structure is reasonably designed and easy to operate, and is suitable for bending and flattening processing of various hardware parts, with good practicality and promotional value. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the bending and flattening mold in the background technology.

[0018] Figure 2 This is a schematic diagram of the structure of a bending and flattening mold according to a preferred embodiment of the present invention. Figure 1 (Diagram of the mold opening state of upper mold module 10 and lower mold module 20).

[0019] Figure 3 This is a schematic diagram of the structure of a bending and flattening mold according to a preferred embodiment of the present invention. Figure 2 (Diagram of the mold closing state of upper mold module 10 and lower mold module 20). Detailed Implementation

[0020] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0023] Furthermore, the terms indicating orientation, such as "up, down, front, back, left, right, upper end, lower end, longitudinal," etc., are all based on the posture and position of the device or equipment described in this solution during normal use.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] A preferred embodiment of this utility model provides a bending and flattening mold, such as... Figure 2-3As shown, the assembly includes an upper mold module 10 and a lower mold module 20. The lower surface of the upper mold module 10 is provided with a flattening surface 11 for flattening the workpiece. The lower mold module 20 is provided with a mounting groove 21, a fixing block 22 is provided in the mounting groove 21, and a tube position float 23 that cooperates with the fixing block 22 and can slide longitudinally. The lower mold module 20 is provided with a stripping ejector assembly 24 for providing vertical elastic force to the tube position float 23. The fixing block 22 is provided with a first positioning groove 221 facing the tube position float 23 for positioning the front end of the workpiece bending part 01. The upper surface of the tube position float 23 is provided with a second positioning groove 231 that communicates with the first positioning groove 221, and a positioning protrusion 232 provided in the second positioning groove 231 for positioning the rear end of the workpiece bending part 01. By setting a first positioning groove on the fixed block to position the front end of the workpiece's bent portion, and setting a second positioning groove and positioning protrusion on the pipe-positioning float to position the rear end, simultaneous positioning of both ends of the bent portion is achieved. Compared with the traditional structure that only positions the front end, this effectively prevents the workpiece from shifting backward or slipping off due to uneven force during the flattening process, thus improving the stability and reliability of positioning.

[0026] like Figure 2 As shown, when the upper mold module 10 and the lower mold module 20 open the mold, the tube position float 23 is in the first position A, and the inner bottom surface of the second positioning groove 231 is higher than the inner bottom surface of the first positioning groove 221; the bent part of the workpiece is inserted obliquely into the second positioning groove 231. like Figure 3 As shown, when the upper mold module 10 and the lower mold module 20 are closed, the tube position float 23 is driven to the second position B. The inner bottom surface of the first positioning groove 221 and the inner bottom surface of the second positioning groove 231 are located on the same plane. Under the action of the upper mold assembly, the bent part of the workpiece is flattened on the plane where the first positioning groove and the second positioning groove are located. And through the joint action of the inner side surface of the first positioning groove 221 and the positioning protrusion 232, the precise positioning of the front and rear ends of the bent part 01 of the workpiece is achieved.

[0027] In this embodiment, the tube-position float receives elastic force through the ejector pin assembly, placing it in a first position during mold opening, where the bottom surface of the second positioning groove is higher than the bottom surface of the first positioning groove, facilitating workpiece placement and initial positioning. During mold closing, it is driven to a second position, making the bottom surfaces of the two positioning grooves coplanar, facilitating the flattening operation. The precise positioning structures at both ends effectively reduce workpiece displacement and deformation during the flattening process, thereby ensuring workpiece dimensional consistency and shape accuracy, improving overall processing precision and product quality.

[0028] This bending and flattening die is ingeniously designed. By incorporating a fixed block and a longitudinally sliding tube-positioning float in the lower die module, and a first positioning groove on the fixed block for positioning the front end of the bent portion of the workpiece, and a second positioning groove connected to the first positioning groove and a positioning protrusion on the tube-positioning float for positioning the rear end of the bent portion, synchronous and precise positioning of both ends of the bent portion of the workpiece is achieved. In the closed state, the bottom surfaces of the first and second positioning grooves are on the same plane. The flattening plane, through the upper die module, flattens the bent portion of the workpiece, effectively preventing backward movement and material slippage due to uneven force during flattening. This significantly improves product dimensional accuracy, processing stability, and production efficiency. The structure is rationally designed and easy to operate, suitable for bending and flattening various hardware parts, and has good practicality and promotional value.

[0029] Furthermore, the outer surface of the fixed block 22 facing the pipe float is provided with a Z-axis groove 222, and the outer surface of the pipe float 23 is provided with a sliding protrusion 233 that slidably connects with the Z-axis groove 222. Alternatively, the Z-axis groove 222 can also be provided on the pipe float 23, and the sliding protrusion 233 can be provided on the fixed block 22. The above simple positional substitutions are all within the protection scope of this utility model. The cooperation structure of the Z-axis groove and the sliding protrusion ensures that the pipe float always slides along a predetermined trajectory during the up and down movement, avoiding the offset or tilt that may be caused by free floating, so that the first positioning groove and the second positioning groove can be more accurately aligned when the mold is closed, thereby improving the positioning consistency of the workpiece and effectively improving the running stability and positioning accuracy of the mold during the mold opening and closing process.

[0030] Furthermore, the sum of the lengths of the first positioning groove 221 and the second positioning groove 231 is equal to the length of the bent portion 01 of the workpiece after flattening. By precisely matching the sum of the lengths of the two positioning grooves to the length of the bent portion, it can be ensured that the front and rear ends of the bent portion of the workpiece are completely covered by the first and second positioning grooves respectively during the flattening process, thereby achieving precise support and positioning of the entire bent portion and avoiding offset, deformation, or dimensional deviation caused by insufficient positioning.

[0031] Furthermore, the ejector pin assembly 24 is located below the mounting groove 21. The ejector pin assembly 24 includes an ejector pin 241 that extends vertically into the mounting groove 21 to lift the tube position float 23, and a first return spring 242 that provides elastic force to the ejector pin 241. The lower mold module 20 is provided with a first receiving groove 25 that communicates with the mounting groove 21 and accommodates the ejector pin assembly, making more rational use of space. This design avoids the ejector assembly being exposed or occupying extra space, which is conducive to optimizing the overall layout and appearance of the mold. By setting the first return spring 242 to provide elastic force to the ejector pin 241, the retraction speed and force of the tube position float 23 during mold opening can be effectively controlled, preventing it from retracting too quickly or too slowly due to inertia, avoiding impact or jamming on the workpiece or mold, thereby improving the smoothness of mold operation and service life.

[0032] Furthermore, when the upper mold module 10 and the lower mold module 20 open, the first return spring 242 is in a free state (i.e., not compressed). When the tube position float 23 moves to the first position A, the upper surface of the tube position float 23 is not higher than the upper surface of the upper mold module 10. In the mold opening state, the overall surface of the mold is flat, which avoids the phenomenon of workpieces or foreign objects getting stuck between the molds due to the tube position float being higher than the upper mold module. This improves the smoothness and efficiency of material removal and reduces the occurrence of problems such as material jamming and blockage.

[0033] Furthermore, the second position B is located below the first position A. When the upper mold module 10 and the lower mold module 20 are closed, the first return spring 242 is in a non-free state. When the tube position float 23 moves to the second position B, at least a portion of the upper end of the fixed block 22 protrudes from the upper surface of the upper mold module 10. The upper mold module 10 is provided with a clearance groove 12 to avoid the fixed block 22, which realizes the effective use of space. At the same time, the mold moves smoothly and has a compact structure during the opening and closing process, with good processing accuracy, convenient operation and structural reliability.

[0034] Furthermore, the lower die module 20 includes a lower die base 201, a lower pad 202 fixedly connected to the lower die base 201, and a lower ejector plate 203 movably disposed above the lower pad 202; a second return spring 26 is provided between the lower ejector plate 203 and the lower pad 202; a second receiving groove 27 is provided on the lower pad 202 to accommodate the second return spring 26. The second return spring 26 is disposed between the lower ejector plate 203 and the lower pad 202, and can provide a rebound force when the die is opened, so that the lower ejector plate 203 automatically retracts to the initial position. This elastic return structure helps to quickly remove the workpiece from the lower die after stamping or bending, improves the stripping efficiency, reduces the need for manual intervention, and is especially suitable for automated production lines. Moreover, by embedding the second return spring 26 into the second receiving groove 27 on the lower pad 202, the spring is well protected and avoids damage caused by external impact or friction, thereby improving the structural stability and service life of the die. Meanwhile, the spring is fixed in the receiving groove, making it difficult to shift or fall off, thus ensuring its reliability and consistency in long-term use.

[0035] Furthermore, the first receiving groove 25 and the second receiving groove 27 are located on the left and right sides of the lower mold module 20, respectively, avoiding spatial overlap or interference between the two. This layout allows for a more rational allocation of the internal space of the mold, which is conducive to the independent operation and maintenance of each functional component, and also facilitates subsequent upgrades or adjustments.

[0036] Furthermore, the first positioning groove 221 and the Z-direction sliding groove 222 are located at both ends of the same side of the pipe position float 23.

[0037] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A bending and flattening mold, characterized in that, The device includes an upper mold module and a lower mold module. The lower surface of the upper mold module is provided with a flattening surface for flattening the workpiece. The lower mold module is provided with a mounting groove, a fixing block and a tube-positioning float that cooperates with the fixing block and can slide longitudinally. The lower mold module is provided with a stripping ejector assembly for providing vertical elastic force to the tube-positioning float. The fixing block is provided with a first positioning groove facing the tube-positioning float for positioning the front end of the bent portion of the workpiece. The upper surface of the tube-positioning float is provided with a second positioning groove communicating with the first positioning groove and a positioning protrusion disposed in the second positioning groove for positioning the rear end of the bent portion of the workpiece. When the upper mold module and the lower mold module open, the tube position float is in the first position, and the inner bottom surface of the second positioning groove is higher than the inner bottom surface of the first positioning groove. When the upper mold module and the lower mold module are closed, the tube position float is driven to the second position. The inner bottom surface of the first positioning groove and the inner bottom surface of the second positioning groove are on the same plane. The inner side surface of the first positioning groove and the positioning protrusion work together to achieve precise positioning of the front and rear ends of the workpiece bending part.

2. The bending and flattening die according to claim 1, characterized in that, Of the fixed block and the pipe position float, one has a Z-axis groove on its outer surface, and the other has a sliding protrusion on its outer surface that is slidably connected to the Z-axis groove.

3. The bending and flattening die according to claim 1, characterized in that, The sum of the lengths of the first positioning groove and the second positioning groove is equal to the length of the bent portion of the workpiece after it has been flattened.

4. The bending and flattening die according to any one of claims 1-3, characterized in that, The ejector pin assembly is disposed below the mounting groove; the ejector pin assembly includes an ejector pin that extends vertically into the mounting groove to lift the tube position float, and a first return spring that provides elastic force to the ejector pin; the lower mold module is provided with a first receiving groove that communicates with the mounting groove and accommodates the ejector pin assembly.

5. The bending and flattening die according to claim 1, characterized in that, When the upper mold module and the lower mold module open, when the pipe position float moves to the first position, the upper surface of the pipe position float is not higher than the upper surface of the upper mold module.

6. The bending and flattening die according to claim 5, characterized in that, When the upper mold module and the lower mold module are closed, when the tube position float moves to the second position, at least a portion of the upper end of the fixed block protrudes from the upper surface of the upper mold module; the upper mold module is provided with a clearance groove to avoid the fixed block.

7. The bending and flattening die according to claim 4, characterized in that, The lower mold module includes a lower mold base, a lower pad plate fixedly connected to the lower mold base, and a lower ejector plate movably disposed above the lower pad plate; a second return spring is provided between the lower ejector plate and the lower pad plate; a second receiving groove is provided on the lower pad plate to accommodate the second return spring.

8. The bending and flattening die according to claim 7, characterized in that, The first receiving groove and the second receiving groove are located on the left and right sides of the lower mold module, respectively.

9. The bending and flattening die according to claim 2, characterized in that, The first positioning groove and the Z-direction sliding groove are located at both ends of the same side of the pipe position float.

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