A processing die for chassis lug production

Abstract

The utility model relates to punch die technical field especially a kind of processing die for case ear production, including die holder, upper die, lower die, the lower die is fixedly installed on die holder, the lower die is set with through slot in correspondence with the place where case sets ear, the opening width and length of the through slot are the width and length of ear, the upper die is cooperatively arranged with lower die, and the upper die is set with the stamping block of through slot cooperation on the side surface in correspondence with lower die, gap is set between the stamping block and the side wall of through slot in correspondence with the connecting place of ear and case, the gap width is the sheet metal thickness of case, the thickness of lower die is the length of right-angle ear and case connecting section, the side surface of lower die is set with bending mechanism in correspondence with the side of lower die away from upper die on die holder, the side of bending mechanism is set in correspondence with the through slot of lower die and close to gap, the utility model can realize the integrated molding of case and ear, improve the stability of mechanism connection.

Description

Technical Field

[0001] This utility model relates to the field of stamping die technology, specifically to a processing die for the production of chassis lugs. Background Technology

[0002] In server chassis, the installation design of various modules is based on the server's functions. The installation location and fixation of these modules require mounting brackets within the chassis to facilitate installation and secure fixation. Currently, server chassis mounting brackets are primarily installed by soldering, but this method results in low chassis production efficiency and the possibility of the brackets detaching from the chassis. Furthermore, mounting brackets include straight brackets and right-angle brackets. Depending on the specific server module, the appropriate type of bracket is used in the corresponding location. Figure 6 As shown, the heat-affected zone of welding is prone to material degradation, resulting in insufficient strength at the connection point. Under long-term vibration or load conditions, the mounting ears may loosen or even fall off the chassis, seriously threatening the safe operation of the server. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a processing mold for the production of chassis hooks.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a processing mold for producing chassis mounting ears, comprising a mold base, an upper mold, and a lower mold. The lower mold is fixedly installed on the mold base. A through groove is provided on the lower mold corresponding to the mounting ear location on the chassis. The opening width and length of the through groove are the same as the width and length of the mounting ear. The upper mold is configured to cooperate with the lower mold. A stamping block that cooperates with the through groove is provided on one side surface of the upper mold corresponding to the lower mold. A gap is provided between the stamping block and the side wall of the through groove corresponding to the connection between the mounting ear and the chassis. The width of the gap is the thickness of the chassis sheet metal. The thickness of the lower mold is the length of the right-angle mounting ear connection section with the chassis. A bending mechanism is provided on the side of the mold base corresponding to the lower mold away from the upper mold. The bending mechanism is provided on the side of the lower mold corresponding to the through groove and close to the gap.

[0005] In some embodiments, the bending mechanism includes a base, a moving block, a push cylinder, and a push block. The base is fixedly connected to the mold base, and a groove is provided on the base corresponding to the through groove. The moving block is slidably installed in the groove, and one end of the moving block is flush with the opening of the through groove. The push block is fitted on the side of the base away from the through groove and is connected to the moving block. The push cylinder is installed on the base, and the piston end of the push cylinder is connected to the push block.

[0006] In some embodiments, the base is provided with an optical axis, and the push block is provided with a linear bearing that cooperates with the optical axis.

[0007] In some embodiments, the lower mold is provided with a plurality of optical axes II, and the upper mold is provided with a linear bearing II that cooperates with the optical axes II.

[0008] In some embodiments, the lower end of the stamping block is chamfered at the end corresponding to the gap.

[0009] In some embodiments, a second gap is provided between the moving block and the lower mold, and the distance of the second gap is consistent with the thickness of the chassis sheet metal.

[0010] In some embodiments, the moving block has a chamfered edge at one end facing the through slot and near the opening of the through slot.

[0011] In some embodiments, the pusher cylinder is a hydraulic cylinder or a pneumatic cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by integrating stamping and bending functions, right-angle hanging ears can be processed in one go, which has the advantages of simplifying the production process, improving production efficiency, ensuring the connection strength of the hanging ears, and avoiding secondary processing errors.

[0013] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. The embodiments of this application will provide a detailed description and understanding of the application. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a bottom view of the present invention; Figure 4 This is a front view of the present invention; Figure 5 This is a cross-sectional view of the fitting between the stamping block and the through slot of this utility model; Figure 6 A schematic diagram showing the integrated mounting ears on one side of the chassis.

[0015] In the diagram: 1. Mold base; 2. Upper mold; 3. Lower mold; 4. Through slot; 5. Stamping block; 6. Clearance; 7. Base; 8. Moving block; 9. Push cylinder; 10. Push block; 11. Optical axis one; 12. Optical axis two; 13. Chamfer; 14. Clearance two; 15. Chamfer two; 16. Straight piece hanging ear; 17. Right angle hanging ear. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Traditionally, server chassis mounting brackets are installed using welding, which results in low chassis production efficiency and a risk of bracket detachment. Furthermore, different types of brackets, including straight brackets and right-angle brackets, are required depending on the server module, increasing production complexity.

[0018] In this regard, such as Figures 1 to 5 As shown, this application proposes a processing mold for producing chassis mounting ears, including a mold base 1, an upper mold 2, and a lower mold 3. The lower mold 3 is fixedly installed on the mold base 1. A through groove 4 is provided on the lower mold 3 corresponding to the mounting ear location on the chassis. The opening width and length of the through groove 4 are the same as the width and length of the mounting ear. The upper mold 2 is configured to cooperate with the lower mold 3. A stamping block 5 is provided on one side surface of the upper mold 2 corresponding to the through groove 4 to cooperate with the lower mold 3. A gap 6 is provided between the stamping block 5 and the side wall of the through groove 4 corresponding to the connection between the mounting ear and the chassis. The width of the gap 6 is the thickness of the chassis sheet metal. The thickness of the lower mold 3 is the length of the right-angle mounting ear connection section with the chassis. A bending mechanism is provided on the side of the mold base 1 corresponding to the lower mold 3 away from the upper mold 2. The bending mechanism is provided on the side of the lower mold 3 corresponding to the through groove 4 and close to the gap 6.

[0019] For ease of understanding, the following explains some key terms in this embodiment: The mold base 1 serves as a support structure for the entire processing mold, used to install and fix components such as the upper mold 2, lower mold 3, and bending mechanism, ensuring the stability and accuracy of the mold during operation.

[0020] The upper die 2 works in conjunction with the lower die 3 to apply pressure to the sheet metal material during the stamping process, causing it to deform or be cut. The upper die 2 is usually installed on the upper part of the die and can move up and down.

[0021] The lower die 3 serves as a load-bearing and positioning component during the stamping process, working together with the upper die 2 to process the sheet metal material. The lower die 3 is typically fixedly mounted on the die base 1 and is equipped with structures for positioning and supporting the workpiece.

[0022] The through slot 4 forms a through opening in the lower die 3 to accommodate the sheet metal material to be processed and to guide the stamping block 5 to perform the stamping operation, thereby forming the initial shape of the hanging ear.

[0023] The stamping block 5 is a protruding component on the upper die 2. During the stamping process, it enters the through groove 4 of the lower die 3 to stamp the sheet metal material, forming it into the shape of a hanging ear. The size and shape of the stamping block 5 correspond to the geometric features of the hanging ear.

[0024] The gap 6 is a specific distance reserved between the stamping block 5 and the side wall of the through slot 4. This distance is usually matched with the thickness of the sheet metal of the chassis to be processed, so as to ensure that the sheet metal material can be sheared or formed during the stamping process, while avoiding excessive extrusion or damage.

[0025] The bending mechanism is used to further bend the formed straight lug after stamping, so that it forms a right-angle lug. This mechanism is usually set on the mold base 1 and works in conjunction with the through slot 4 of the lower mold 3.

[0026] This application provides a processing mold for producing chassis mounting lugs, the structure of which mainly includes a mold base 1, an upper mold 2, and a lower mold 3. The mold base 1, as the overall support structure of the mold, can be made of materials such as steel plate or cast iron, and its function is to provide a stable mounting base for the various components of the mold. The upper mold 2 and the lower mold 3, as the main processing components, together complete the stamping and forming of sheet metal materials.

[0027] The lower die 3 is fixedly mounted on the die base 1 to ensure positional stability during the stamping process. The lower die 3 can be fixed in various ways, such as by bolt connection, pin positioning, or welding. For example, bolts can be used to tighten the lower die 3 by providing bolt holes at its bottom and engaging with threaded holes on the die base 1.

[0028] On the lower die 3, a through groove 4 is provided corresponding to the position where the mounting ears need to be installed on the chassis. The shape and size of the through groove 4 match the width and length of the final mounting ears. For example, the through groove 4 can be formed by milling, wire cutting, or electrical discharge machining, and its opening width and length are precisely set to ensure that the dimensions of the stamped mounting ears meet the requirements.

[0029] The upper die 2 and the lower die 3 are designed to fit together to achieve the stamping function. During operation, the upper die 2 can move vertically to engage with the stationary lower die 3. For example, the upper die 2 can be connected to the die base 1 via a guide post and guide sleeve structure to ensure its accuracy and stability during vertical movement.

[0030] The upper die 2 has a stamping block 5 on one side surface corresponding to the lower die 3, which mates with the through slot 4. The stamping block 5 is a protrusion on the upper die 2, and its shape and size correspond to the through slot 4. For example, the stamping block 5 can be made of high-strength tool steel and its hardness and wear resistance can be improved by heat treatment to withstand repeated stamping.

[0031] A gap 6 is provided between the stamping block 5 and the side wall of the through slot 4, which corresponds to the connection between the mounting lug and the chassis. The width of the gap 6 is set to the thickness of the chassis sheet metal. For example, during the processing of the stamping block 5 and the through slot 4, by precisely controlling the dimensions, the gap 6 between them can accommodate sheet metal material and shear or extrude it during stamping.

[0032] The thickness of the lower mold 3 is set to the length of the connection section between the right-angle lug and the chassis. This means that the vertical dimension of the lower mold 3 is designed to match the length of the connection section between the lug and the chassis after bending. For example, the thickness of the lower mold 3 can be precisely controlled through machining to ensure that the lug can form a standard right-angle shape during subsequent bending.

[0033] A bending mechanism is provided on the mold base 1, corresponding to the side of the lower mold 3 away from the upper mold 2. This bending mechanism is used to bend the lug after stamping. For example, the bending mechanism may consist of one or more movable parts that apply a bending force to the lug under the action of a driving force.

[0034] The bending mechanism is positioned at the through slot 4 of the lower die 3 and near the gap 6. This arrangement ensures that the bending mechanism can precisely act on the lug extending from the through slot 4 and effectively bend the lug after the stamping block 5 has finished stamping. For example, the bending mechanism can be mounted on the side of the die base 1, and its working part can extend into the exit area of ​​the through slot 4 to bend the lug.

[0035] The processing mold of this application achieves rapid one-piece forming of the mounting ears by integrating stamping and bending functions. This mold can directly stamp and bend the chassis sheet metal to form straight or right-angle mounting ears, thus avoiding traditional welding processes and improving the production efficiency of chassis mounting ears. At the same time, since the mounting ears and chassis are formed as a single piece, the risk of connection detachment is effectively avoided, ensuring the firmness of the connection between the mounting ears and the chassis.

[0036] In some embodiments described above in this application, a processing mold for manufacturing chassis lugs is proposed, which includes a mold structure for initially stamping the lugs and a bending mechanism for bending the lugs. However, in practical applications, how to accurately and efficiently achieve right-angle bending of the lugs, and ensure the stability of the bending process and the forming quality of the lugs, are technical problems that need further clarification and optimization.

[0037] In this regard, this application further proposes the specific structure and operation process of the aforementioned bending mechanism. The bending mechanism includes a base 7, a moving block 8, a push cylinder 9, and a push block 10. The base 7 is fixedly connected to the mold base 1, providing stable support for the entire bending mechanism. A sliding groove is provided on the base 7 corresponding to the through slot 4, which is used to precisely guide the movement of the moving block 8. The moving block 8 is slidably installed in the sliding groove, with one end flush with the opening of the through slot 4, ensuring accurate contact after the lug is stamped. The push block 10 is fitted on the side of the base 7 away from the through slot 4 and connected to the moving block 8, responsible for transmitting power to the moving block 8. The push cylinder is installed on the base 7, with its piston end connected to the push block 10, serving as the actuator providing power. When a right-angle lug needs to be processed, a straight lug is first formed by stamping with a mold, and then the upper mold 2 moves up until the lower end of the stamping block 5 is flush with the lower side of the lower mold 3, creating space for the bending operation. Next, the moving block 8 is moved by the pusher cylinder, causing the moving block 8 to push the hanging ear out of the through slot 4, thereby bending the hanging ear into a right angle. After the bending is completed, all mechanisms return to their original positions, ready for the next processing.

[0038] Specifically, the base 7, as the structural foundation of the bending mechanism, ensures the rigidity and positioning accuracy of the entire bending system during operation through its fixed connection with the mold base 1, avoiding processing errors caused by vibration or uneven force. The groove on the base 7 provides a precise movement trajectory for the moving block 8, ensuring that it slides smoothly along a preset direction when pushing the lug, thus achieving accurate bending angle. The moving block 8 is the component that directly acts on the lug; it is slidably installed in the groove and flush with the opening of the through slot 4. This means that after the lug is initially stamped, the moving block 8 can seamlessly contact the lug and push it out from the side of the through slot 4. The push block 10, as an intermediate link in force transmission, effectively transmits the thrust generated by the push cylinder to the moving block 8. Its position is located on the side of the base 7 away from the through slot 4, which helps optimize the overall layout and operating space of the mechanism. The push cylinder is the core component providing bending power; it can be a hydraulic cylinder or a pneumatic cylinder. The piston's extension and retraction drive the push block 10 and the moving block 8, achieving the bending of the lug.

[0039] In the entire process of processing the right-angle lug, the first step is to stamp the straight lug. This is done using the stamping block 5 of the upper die 2 and the through groove 4 of the lower die 3 to initially shape the sheet metal material into a straight lug, laying the foundation for subsequent precise bending. Next, the upper die 2 moves up until the lower end of the stamping block 5 is flush with the lower side of the lower die 3. This action is crucial, as it provides the necessary space for the moving block 8 to push the lug for bending, avoiding interference from the stamping block 5 during the bending process. Then, the push cylinder is activated, driving the moving block 8 to move within the slide groove via the push block 10. The moving block 8 pushes the formed straight lug out of the through groove 4. During this process, the other end of the lug remains fixed by the die, and the protruding part, pushed by the moving block 8, is forcibly bent into the required right-angle shape, using the edge of the through groove 4 as a fulcrum. Finally, all mechanisms return to their original positions, ensuring the die is in standby mode, ready for the processing of the next workpiece.

[0040] Through the specific design and operation steps of the bending mechanism described above, this application enables precise and controllable right-angle bending of stamped straight lugs. First, the upper die 2 and lower die 3 work together to stamp the sheet metal material into straight lugs, laying the foundation for subsequent bending. Then, the lifting of the upper die 2 provides the necessary space for the bending operation, avoiding interference. Next, the push cylinder drives the moving block 8, which slides stably within the groove, pushing the straight lug out of the through groove 4. Using the edge of the through groove 4 as a fulcrum, the lug is precisely bent into the required right-angle shape. This step-by-step processing flow combines two independent but coordinated actions: stamping and bending. This effectively avoids problems such as material stress concentration, lug deformation, or breakage that may occur with traditional one-time stamping, significantly improving the forming quality and production efficiency of right-angle lugs. Furthermore, the sliding of the moving block 8 within the groove and the connection between the push block 10 and the push cylinder ensure stable transmission of the bending force and accuracy of its direction, further enhancing the reliability and repeatability of the processing.

[0041] In some embodiments of this application, the bending mechanism pushes the push block 10 through a push cylinder, which in turn moves the moving block 8 to complete the bending of the lug. However, during the linear motion of the push block 10 and the moving block 8, if there is a lack of effective guidance and support, the motion trajectory may deviate, affecting the bending accuracy and stability, and may even increase friction and wear between components, reducing the service life of the mold.

[0042] In this regard, this application further proposes that the base 7 is provided with an optical axis 11, and the push block 10 is provided with a linear bearing that cooperates with the optical axis 11.

[0043] Specifically, the optical axis 11 typically refers to a high-precision, high-hardness, smooth-surface linear motion guide rail, whose main function is to provide precise motion trajectory guidance for the push block 10. The optical axis 11 can be made of precision-ground and hardened steel, possessing excellent wear resistance and straightness. In practical applications, the optical axis 11 can be securely mounted on the base 7 using bolt fixing, press-fit, or other methods. Its axial direction is parallel to the expected movement direction of the push block 10, ensuring that the push block 10 moves along a preset straight path during movement. The diameter and length of the optical axis 11 should be rationally selected based on the size of the push block 10, the stress conditions, and the required stroke to ensure sufficient rigidity and stability.

[0044] Linear bearing 1 is a rolling bearing used to achieve linear motion. It typically contains balls or rollers and can slide linearly along a straight axis with low friction. Linear bearing 1 works in conjunction with straight axis 11 to provide low-friction, high-precision linear guidance for push block 10, ensuring smooth and accurate movement of push block 10 along straight axis 11. Linear bearing 1 can be embedded or fixed in corresponding holes inside or outside push block 10. When push block 10 moves under the drive of push cylinder, linear bearing 1 slides along straight axis 11 fixed to base 7, thereby guiding push block 10 in precise linear motion. The type of linear bearing 1 can be selected according to load, speed, and accuracy requirements. For example, a ball linear bearing can be selected to provide lower friction and higher precision, or a roller linear bearing can be selected to withstand greater radial loads.

[0045] Through the above technical solution, an optical axis 11 is set on the base 7, and a linear bearing 1 that cooperates with the optical axis 11 is set on the push block 10, providing precise guidance and support for the linear movement of the push block 10. When the push cylinder pushes the push block 10, the linear bearing 1 can slide smoothly along the optical axis 11, effectively avoiding the possible wobble or jamming of the push block 10 during movement, thus ensuring that the movement trajectory of the moving block 8 pushing the hanging ear to bend is more stable and precise. This significantly improves the accuracy and consistency of the hanging ear bending and forming, reduces the scrap rate caused by unstable movement, reduces frictional wear between parts, and extends the service life of the mold.

[0046] In some of the above embodiments, a processing mold for manufacturing chassis lugs is proposed, which includes an upper mold 2 and a lower mold 3 that cooperate to perform stamping and bending. However, in actual operation, the relative motion accuracy between the upper mold 2 and the lower mold 3 is crucial for ensuring processing quality and extending mold life. If the upper mold 2 wobbles or skews during the pressing process, it may lead to inaccurate stamping, lug deformation, or accelerated wear of mold components.

[0047] In this application, it is further proposed that the lower mold 3 is provided with a plurality of optical shafts 12, and the upper mold 2 is provided with linear bearings 12 that cooperate with the optical shafts 12. Specifically, the plurality of optical shafts 12 are typically made of high-hardness, high-precision steel, and their surfaces are finely ground and hardened to ensure extremely low surface roughness and high wear resistance. These optical shafts 12 are precisely fixedly mounted on the lower mold 3 as guide elements for the linear reciprocating motion of the upper mold 2. Their number and layout are optimized according to the size, weight, and required guiding accuracy of the upper mold 2. For example, they can be symmetrically arranged at the four corners of the lower mold 3 or distributed along its long side to provide sufficient support and guiding rigidity. The linear bearings 12 are mounted on the upper mold 2 and cooperate with the plurality of optical shafts 12 on the lower mold 3. The linear bearings 12 typically contain balls or sliding bushings, which can convert the radial load on the optical shafts 12 into low-friction forces for axial movement. When the upper die 2 moves up and down during the stamping or bending process, the linear bearing 2 slides smoothly on the optical axis 12, thereby precisely restricting the movement of the upper die 2 in the vertical direction.

[0048] Through the above technical solution, multiple optical axes 12 are set on the lower die 3, and linear bearings 12 that cooperate with the optical axes 12 are set on the upper die 2, providing a high-precision guiding system for the vertical movement of the upper die 2. This effectively ensures that the upper die 2 can move precisely up and down along a predetermined trajectory during stamping and bending, greatly reducing the lateral swaying or skew that may occur in the upper die 2. Therefore, it can significantly improve the stamping accuracy and the quality of the lug forming, avoid processing defects caused by misalignment of die components, and thus ensure the dimensional accuracy and appearance quality of the chassis lug. At the same time, this precise guiding mechanism also reduces friction and wear between die components, thereby extending the service life of the die and ensuring the smoothness and reliability of the die operation.

[0049] In the aforementioned processing mold used for chassis mounting lug production, the lower end of the stamping block 5 contacts the sheet metal during the downward movement. If the lower edge of the stamping block 5 is too sharp, the sheet metal may be directly broken at the through groove 4 due to excessive shearing force during stamping, thus affecting the forming quality of the mounting lug and even causing material waste.

[0050] In this regard, this application further proposes that the lower end of the stamping block 5, corresponding to one end of the gap 6, is provided with a chamfer 13. This chamfer 13 refers to cutting or grinding at the lower edge of the stamping block 5 to form a slope or arc surface, rather than a sharp right angle. Specifically, the chamfer 13 adopts an arc design, that is, it is designed as an arc shape with a certain radius. Compared with a straight slope, this arc-shaped edge can provide a more continuous and uniform contact surface, further optimizing the force distribution between the stamping block 5 and the sheet metal. The radius of the arc can be optimized according to the material, thickness, and required forming angle of the sheet metal to ensure that a gentle and effective thrust is applied to the sheet metal during the stamping process.

[0051] Through the above technical solution, when the stamping block 5 moves down to contact the sheet metal, the chamfer 13, especially its arc design, allows the stamping block 5 to push the sheet metal down in a gentle manner. This gentle pushing action effectively disperses the local stress during the stamping process and significantly reduces the shearing force caused by the excessively sharp edges of the stamping block 5. Therefore, it avoids the phenomenon of the sheet metal being directly broken at the through groove 4 due to excessive shearing force, thereby ensuring the integrity and precision of the hanging ear forming, improving product quality, and reducing the scrap rate.

[0052] In some embodiments described above in this application, a bending mechanism is proposed for bending straight tabs into right-angle tabs. This bending mechanism achieves bending by pushing the tab with a moving block 8. However, during its implementation, if the clearance 6 between the moving block 8 and the lower die 3 is improper, the chassis sheet metal may be subjected to uneven compression or friction during bending, which may lead to sheet metal deformation, surface scratches, or even tearing, affecting the forming quality and product qualification rate of the right-angle tab.

[0053] In this regard, this application further proposes to provide a gap 6 between the moving block 8 and the lower mold 3, and the distance of the gap 6 is consistent with the thickness of the chassis sheet metal.

[0054] Specifically, the gap 6 refers to the specific space reserved between the moving block 8 and the lower die 3 to accommodate the chassis sheet metal when the moving block 8 of the bending mechanism pushes the hanging lug for bending. The purpose of this gap 6 is to provide a precise guiding and supporting channel for the chassis sheet metal, ensuring smooth and unobstructed movement during bending. The distance of the gap 6 is precisely set to match the actual thickness of the chassis sheet metal. This means that the width or height of the gap 6 is equal to the thickness of the sheet metal material to be processed, thus forming a tight but not constricting fit. This precise dimensional matching can be achieved through high-precision machining of the moving block 8 and the lower die 3, or by adjusting it using precision shims during assembly, to ensure that the distance of the gap 6 remains consistent with the sheet metal thickness during processing of different batches or sheet metal of different thicknesses.

[0055] Through the above technical solution, because a gap 6, consistent with the thickness of the chassis sheet metal, is set between the moving block 8 and the lower mold 3, the chassis sheet metal can be precisely guided and supported during bending. This effectively avoids the sheet metal from swaying due to an excessively large gap 6 or being excessively squeezed due to an excessively small gap 6, thus significantly reducing the risk of sheet metal deformation, scratches, or tears. Therefore, this solution can ensure the forming accuracy and surface quality of the right-angle lugs, improve production efficiency and product qualification rate, and reduce material waste.

[0056] In some embodiments of this application, the bending mechanism uses the moving block 8 to push the hanging ear out of the through slot 4 for bending. However, when the moving block 8 directly pushes the sheet metal for bending, the contact surface between the moving block 8 and the sheet metal may be relatively sharp, and the sheet metal will be subjected to a certain shear force during the pushing process. This may cause the sheet metal to tear or break at the corresponding through slot 4 due to excessive shear force, affecting the forming quality and production efficiency of the hanging ear.

[0057] In response, this application further proposes to provide a chamfer 13 at the end of the moving block 8 facing the through groove 4 and near the opening of the through groove 4. Through the arc design of the chamfer 13, the sheet metal can be flexibly pushed, avoiding the sheet metal from being directly broken at the through groove 4 due to excessive shearing force when the moving block 8 moves.

[0058] Specifically, the chamfer 13 second refers to the edge where the moving block 8 contacts the sheet metal, which is no longer a sharp right angle, but a beveled or rounded surface formed after trimming. The main function of the chamfer 13 second is to change the force distribution when the moving block 8 contacts the sheet metal, dispersing the shear force that might otherwise be concentrated, and providing a smooth transition surface. The chamfer 13 second can take various forms; for example, it can be a rounded chamfer 13 with a specific radius, or a beveled chamfer 13 with a specific angle. In actual processing, the chamfer 13 can be formed at the corresponding edge of the moving block 8 through milling, grinding, or other processes. Its radius or angle should be optimized according to the material, thickness, and required bending angle of the sheet metal to ensure that a gentle and uniform force is applied to the sheet metal during the pushing process. The rounded design of chamfer 13 enables flexible pushing of the sheet metal. This avoids hard, sharp contact when bending the sheet metal, instead applying force gradually through a smooth transition surface. This allows the sheet metal to deform smoothly under stress, reducing stress concentration. This flexible pushing effectively reduces the local shear stress on the sheet metal in the initial bending stage, preventing material damage caused by stress concentration. The rounded design is one of the effective ways to achieve flexible pushing. A larger radius results in a smoother pushing process, but may require a larger pushing stroke. Conversely, a smaller radius may result in more concentrated pushing force. Therefore, the selection of the radius requires comprehensive consideration of the sheet metal's ductility, thickness, and the structural space of the mold. The above design aims to prevent the sheet metal from being directly broken at the through groove 4 due to excessive shear force when the moving block 8 moves. Through the above design, the contact between the moving block 8 and the sheet metal is changed from line contact or point contact to surface contact, and the force transmission is smoother, thereby significantly reducing local shear stress and preventing the sheet metal from breaking during bending due to shear force exceeding its ultimate strength.

[0059] Through the above technical solution, a chamfer 13 is provided at the end of the moving block 8 facing the through slot 4 and near the opening of the through slot 4, and an arc design is adopted. This ensures that when the moving block 8 pushes the sheet metal to bend, the contact between the moving block 8 and the sheet metal is no longer a sharp edge, but a smooth arc surface. This design can apply a flexible pushing force to the sheet metal, dispersing the shear force that might originally be concentrated at a point or along a line to a larger contact surface, thereby effectively reducing the local shear stress borne by the sheet metal during bending. Especially when the moving block 8 moves and pushes the hanging ear out of the through slot 4 for bending, the presence of chamfer 13 avoids the risk of the sheet metal tearing or breaking at the corresponding through slot 4 due to excessive shear force, significantly improving the forming quality and production yield of the hanging ear, and ensuring the stability and reliability of the processing.

[0060] In some embodiments described above in this application, a technical solution is proposed that uses a pusher cylinder to move a moving block 8, thereby causing the hanging ear to bend at a right angle at the end of the through slot 4. However, in practical applications, the specific type of pusher cylinder and its working characteristics have a significant impact on the bending efficiency, accuracy, and applicability of the mold, and require further clarification and optimization.

[0061] In this regard, this application further proposes that the aforementioned push cylinder is a hydraulic cylinder or a pneumatic cylinder.

[0062] Specifically, the pusher cylinder is an actuator that converts fluid pressure energy into mechanical energy and performs linear reciprocating motion. Its main function is to provide the necessary thrust for the bending mechanism to drive the moving block 8 to move, thereby realizing the bending operation of the lug. Depending on the fluid medium used, the pusher cylinder can be a hydraulic cylinder or a pneumatic cylinder.

[0063] When the push cylinder is a hydraulic cylinder, it uses hydraulic oil as the working medium. A hydraulic pump generates high-pressure oil, which drives the piston to move within the cylinder. Hydraulic cylinders typically feature high output force, good rigidity, smooth transmission, and high control precision. During implementation, hydraulic cylinders need to be used in conjunction with hydraulic system components such as hydraulic pump stations, oil tanks, and control valves to achieve precise force and position control. They are suitable for applications requiring large bending forces or high bending accuracy.

[0064] When the piston is a pneumatic cylinder, it uses compressed air as the working medium. Compressed air is supplied through an air source device to drive the piston to move within the cylinder. Pneumatic cylinders typically feature simple structure, rapid action, cleanliness, environmental friendliness, and easy maintenance. During implementation, the pneumatic cylinder needs to be used in conjunction with pneumatic system components such as an air compressor, air tank, air source processing element, and control valve. It is suitable for applications requiring rapid response or high environmental cleanliness.

[0065] The above technical solution specifically limits the push cylinder to either a hydraulic cylinder or a pneumatic cylinder, allowing those skilled in the art to flexibly select the appropriate drive method based on actual production needs and working conditions. For example, for applications requiring high precision and strong bending force, a hydraulic cylinder can be used to ensure the stability and accuracy of the lug bending; while for applications seeking high efficiency and rapid production, a pneumatic cylinder can be used to shorten the bending cycle and increase production speed. This selectivity allows the bending mechanism of the mold to better adapt to the processing needs of sheet metal chassis of different materials and thicknesses, thereby optimizing the efficiency, precision, and reliability of the bending process and improving the versatility and practicality of the entire processing mold.

[0066] The following example will provide a more detailed explanation of the above technical solution: In a server chassis manufacturing plant, there is a need to efficiently and reliably produce chassis with integrated mounting ears to meet the installation requirements of different server modules, including straight mounting ears and right-angle mounting ears. Traditional welding methods suffer from low production efficiency and easy detachment of connections. To address this, the plant introduced a new type of processing mold.

[0067] The processing mold includes a mold base 1, an upper mold 2, and a lower mold 3. The lower mold 3 is firmly fixed to the mold base 1. A through slot 4 is pre-cut on the lower mold 3, the width and length of which precisely match the width and length of the lug to be produced. The upper mold 2 is fitted to the lower mold 3, and a stamping block 5 is provided on one side surface of the upper mold 2 corresponding to the lower mold 3, which mates with the through slot 4. A gap 6 is left between the stamping block 5 and the side wall of the through slot 4. The width of the gap 6 is set to the thickness of the chassis sheet metal, which is used to form the connection part between the lug and the chassis. The thickness of the lower mold 3 is designed to be the length of the right-angle lug connection section with the chassis, providing a dimensional reference for subsequent bending operations. A bending mechanism is provided on the side of the mold base 1 corresponding to the lower mold 3 away from the upper mold 2. This bending mechanism is located at the through slot 4 of the lower mold 3 and near the gap 6.

[0068] In actual production, the straight mounting lugs are first formed by stamping. A pre-treated sheet metal chassis is placed on the lower die 3, aligning the area where the mounting lugs will be formed with the through slot 4 of the lower die 3. The stamping equipment drives the upper die 2 to move downwards. The stamping block 5 of the upper die 2 moves downwards, punching the sheet metal material into the through slot 4 of the lower die 3. The gap 6 between the stamping block 5 and the side wall of the through slot 4 allows the sheet metal material to form the connecting part of the mounting lug when pushed down by the stamping block 5. Since the width of the gap 6 is consistent with the thickness of the sheet metal, the dimensional accuracy of the connection between the mounting lug and the chassis is ensured. The lower end of the stamping block 5 is provided with a chamfer 13 corresponding to one end of the gap 6. Through the arc design of the chamfer 13, the sheet metal is pushed down flexibly, avoiding the sheet metal from being directly punched off at the through slot 4 due to excessive shearing force, thus improving the forming quality of the mounting lugs. The upper die 2 is equipped with linear bearings 2 that cooperate with multiple optical axes 2 12 on the lower die 3, ensuring the stability and positioning accuracy of the upper die 2 during its up-and-down movement and avoiding deviations during the stamping process. After the stamping block 5 has completely moved down, the straight part of the hanging ear has been formed and is integrally connected with the sheet metal of the chassis.

[0069] If right-angle lugs are required, after stamping the straight lugs, the upper die 2 moves up to a position where the lower end of the stamping block 5 is flush with the lower side of the lower die 3. At this time, the bending mechanism starts to work. The bending mechanism includes a base 7, a moving block 8, a push cylinder 9, and a push block 10. The base 7 is fixedly connected to the die base 1, and a slide groove is provided on the base 7 corresponding to the through groove 4. The moving block 8 is slidably installed in the slide groove, and one end of the moving block 8 is flush with the opening of the through groove 4. A push cylinder (e.g., a hydraulic cylinder or a pneumatic cylinder) is installed on the base 7, and its piston end is connected to the push block 10. The push block 10 is connected to the moving block 8 and is positioned on the side of the base 7 away from the through groove 4. When the push cylinder is activated, it pushes the push block 10, which in turn pushes the moving block 8 to move within the slide groove. The moving block 8 has a chamfer 13 at one end facing the through slot 4 and near the opening of the through slot 4. The rounded design of the chamfer 13 allows for flexible pushing of the sheet metal, preventing the sheet metal from breaking directly at the through slot 4 due to excessive shearing force. A gap 6 is provided between the moving block 8 and the lower die 3. The distance of the gap 6 is consistent with the thickness of the chassis sheet metal, ensuring smooth movement and precise bending of the sheet metal during bending. The movement of the moving block 8 causes the formed straight tab to extend out of the through slot 4 and, supported by the thickness of the lower die 3, is pushed and bent into a right angle by the moving block 8. The thickness of the lower die 3 plays a crucial supporting role here, ensuring the accuracy of the bending angle and the length of the connecting section of the right-angle tab. An optical axis 11 is provided on the base 7, and a linear bearing 1 that cooperates with the optical axis 11 is provided on the push block 10, ensuring smooth linear movement of the push block 10 and the moving block 8 during the pushing process, improving bending accuracy. After the right-angle lugs are formed, all mechanisms are restored to their original positions, ready for the next processing.

[0070] Through the overall technical solution of the aforementioned mold, the factory can achieve integrated molding of the mounting ears and the chassis sheet metal, avoiding the problems of low production efficiency and weak connections caused by traditional welding methods. The integration of the stamping and bending processes significantly improves production efficiency. The connection between the mounting ears and the chassis is achieved through the plastic deformation of the material itself, improving connection strength and reliability and eliminating the risk of mounting ear detachment. In addition, the mold can flexibly produce straight mounting ears and right-angle mounting ears, meeting the installation requirements of different server modules without the need to change molds or use different processing equipment, thus improving production flexibility and versatility. The chamfered corner 13 design on the stamping block 5 and the moving block 8, as well as the guiding mechanism of the upper die 2 and the push block 10, ensures the flexible deformation of the sheet metal during stamping and bending, reduces stress concentration, avoids material tearing or breakage, and improves the forming quality and appearance of the mounting ears.

[0071] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining mold for producing chassis mounting lugs, characterized in that: The assembly includes a mold base (1), an upper mold (2), and a lower mold (3). The lower mold (3) is fixedly installed on the mold base (1). A through groove (4) is provided on the lower mold (3) corresponding to the mounting lug of the chassis. The opening width and length of the through groove (4) are the same as the width and length of the mounting lug. The upper mold (2) is configured to cooperate with the lower mold (3). A stamping block (5) is provided on one side surface of the upper mold (2) corresponding to the lower mold (3) to cooperate with the through groove (4). A gap (6) is provided between the stamping block (5) and the side wall of the through groove (4) corresponding to the connection between the mounting lug and the chassis. The width of the gap (6) is the thickness of the chassis sheet metal. The thickness of the lower mold (3) is the length of the right-angle mounting lug connecting to the chassis. A bending mechanism is provided on the side of the mold base (1) corresponding to the lower mold (3) away from the upper mold (2). The bending mechanism is provided on the side of the lower mold (3) corresponding to the through groove (4) and close to the gap (6).

2. The processing mold for producing chassis mounting lugs according to claim 1, characterized in that: The bending mechanism includes a base (7), a moving block (8), a push cylinder (9), and a push block (10). The base (7) is fixedly connected to the mold base (1). A sliding groove is provided on the base (7) corresponding to the through groove (4). The moving block (8) is slidably installed in the sliding groove, and one end of the moving block (8) is flush with the opening of the through groove (4). The push block (10) is fitted on the side of the base (7) away from the through groove (4). The push block (10) is connected to the moving block (8). The push cylinder is installed on the base (7), and the piston end of the push cylinder is connected to the push block (10).

3. The processing mold for producing chassis mounting lugs according to claim 2, characterized in that: The base (7) is provided with an optical axis (11), and the push block (10) is provided with a linear bearing that cooperates with the optical axis (11).

4. The processing mold for producing chassis hooks according to claim 1, characterized in that: The lower mold (3) is provided with a plurality of optical axes (12), and the upper mold (2) is provided with linear bearings that cooperate with the optical axes (12).

5. A processing mold for producing chassis mounting lugs according to claim 1, characterized in that: The lower end of the stamping block (5) is provided with a chamfer (13) corresponding to one end of the gap (6).

6. A processing mold for producing chassis mounting lugs according to claim 2, characterized in that: A gap (6) is provided between the moving block (8) and the lower mold (3), and the distance of the gap (6) is consistent with the thickness of the chassis sheet metal.

7. A processing mold for producing chassis mounting lugs according to claim 6, characterized in that: The moving block (8) has a chamfer (13) at one end facing the through groove (4) and near the opening of the through groove (4).

8. A processing mold for producing chassis mounting lugs according to claim 2, characterized in that: The push cylinder is a hydraulic cylinder or a pneumatic cylinder.

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