A sash trimming and profiling die and method

Abstract

The application discloses a window frame trimming and shaping die and method, which comprises an upper die assembly and a lower die assembly; the upper die assembly comprises an upper die body, a trimming cutter block, a material returning assembly, a first upper pressing core and a second upper pressing core; the trimming cutter block is provided with an upper die trimming edge and a trimming working surface; the lower die assembly is provided with a lower die trimming edge matched with the upper die trimming edge and a trimming supporting surface matched with the trimming working surface; and the material returning assembly is used for keeping the separated waste material on the lower die assembly when the upper die assembly returns. The application avoids defects such as tearing and cracking of the appearance surface caused by the suspended trimming, cancels the waste material cutter structure, and eliminates the iron powder pressure injury problem. Only the trimming cutter block needs to be adjusted to realize the flexible modification of the sealed window part into the open window part, the mold development investment and the production switching cost are greatly reduced, and the flexible production of a set of mold compatible with multiple vehicle models and multiple version products is realized.

Description

Technical Field

[0001] This application relates to the field of stamping dies for automotive exterior body panels, and more specifically, to a window frame trimming and shaping die and method. Background Technology

[0002] With the diversification of the automotive market, launching both new energy logistics vehicles and passenger cars on the same platform has become a mainstream trend for cost reduction and efficiency improvement in the industry. New energy logistics vehicles generally use sealed window designs for exterior components such as side panels and double doors to meet the enclosure requirements of cargo transportation. However, passenger models developed on the same platform need to modify these sealed window designs to open window designs to suit the lighting and visibility needs of passengers. The industry needs a technical solution to flexibly modify sealed window components into open window components.

[0003] Currently, the molding of the window frame area of ​​automotive body panels requires two core processes: trimming and shaping. Trimming is used to remove excess material from the window sill area to form an outline that fits the shape of the window; shaping is used to perform three-dimensional molding of the trimmed window sill area to ensure the accuracy of the outline and the flatness of the surface.

[0004] However, existing back-mounted trimming and shaping processes, when applied to high-volume shaping scenarios such as window sills, are prone to uneven stress on the sheet metal due to improper connection between trimming and shaping, resulting in suspended trimming edges and appearance defects such as scratches and indentations. Floating trimming and shaping processes employ a "pressing-shaping-trimming" sequence; when the shaping volume exceeds the material's elongation, material pulling occurs, leading to surface dents, wrinkles, or cracks in the finished parts. Integrated blade trimming and shaping processes are suitable for high-volume parts, but for the large waste materials generated from window sill shaping, a scrap cutter is required for slitting. The iron powder particles generated by the scrap cutter can easily cause surface damage. Furthermore, to ensure scrap material slides off smoothly, the mold needs to be designed with a relatively large height, increasing manufacturing costs and debugging difficulty.

[0005] Therefore, how to improve the forming quality and production efficiency of window frame trimming and shaping processes has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to disclose a window frame trimming and shaping mold to improve the forming quality and production efficiency of products in the window frame trimming and shaping process.

[0007] Another objective of this application is to disclose a method for processing window frames using the aforementioned window frame trimming and shaping mold for external covering parts.

[0008] A window frame trimming and shaping mold includes an upper mold assembly and a lower mold assembly;

[0009] The upper mold assembly includes an upper mold body, and a shaping cutter block, a first upper pressure core, and a second upper pressure core disposed on the upper mold body; the shaping cutter block has a shaping working surface and an upper mold cutting edge, and the upper mold cutting edge contacts the workpiece before the shaping working surface in the mold closing direction;

[0010] The lower mold assembly is provided with a lower mold cutting edge that mates with the upper mold cutting edge, and a shaping support surface that mates with the shaping working surface;

[0011] The first upper pressure core is used to press the workpiece body, and the second upper pressure core is used to press the part of the workpiece to be cut off;

[0012] The second upper pressure core is provided with a material ejection component, which is used to retain the waste material formed by the cutting edge on the lower die assembly when the upper die assembly returns.

[0013] In one possible implementation, the ejector assembly includes a resilient ejector pin that is movable along its own axial direction; one end of the resilient ejector pin that contacts the waste material protrudes from the working surface of the second upper pressure core.

[0014] In one possible implementation, the unloading assembly further includes a limiting boss, the working end face of which protrudes beyond the working surface of the second upper pressing core; the limiting boss is adjustablely mounted in the second upper pressing core, and the height of the working end face of the limiting boss protruding beyond the working surface of the second upper pressing core is adjustable.

[0015] The lower mold assembly has a limiting groove corresponding to the position of the limiting boss.

[0016] In one possible implementation, the cutting edge of the upper die protrudes a predetermined height relative to the forming working surface along the mold closing direction of the upper die assembly, the predetermined height being 3mm to 7mm; the cutting edge of the upper die has a predetermined width, the predetermined width being 8mm to 12mm.

[0017] In one possible implementation, the shaping working surface is provided with a bottom marking portion, which protrudes from the shaping working surface.

[0018] In one possible implementation, the first upper pressure core is movably mounted to the upper mold body via a side pin, and an elastic pressure element is also provided between the first upper pressure core and the upper mold body.

[0019] In one possible implementation, the second upper pressure core is mounted on the upper mold body via multiple sets of balancing cylinders and multiple sets of stroke screws, and is slidably connected to the upper mold body via guide posts.

[0020] In one possible implementation, the lower die assembly includes a first lower pressing core and a second lower pressing core. The first lower pressing core is used to support the workpiece body and is provided with the shaping support surface. The second lower pressing core is used to support the part of the workpiece to be cut off and is provided with the lower die cutting edge. The second lower pressing core is provided with a vent hole.

[0021] In one possible implementation, the first pressing core is provided with a wedge-shaped balance block, which is used to cooperate with the first upper pressing core to guide the first upper pressing core to press down smoothly.

[0022] The first pressing core is also provided with a fine positioning component and a coarse positioning component for positioning the workpiece body.

[0023] In one possible implementation, the lower mold assembly is further provided with a mold limiting block, which is used to contact the upper mold body when the mold is closed to the top dead center, so as to limit the downward limit position of the upper mold assembly.

[0024] In one possible implementation, the lower mold assembly is provided with a material sensor for detecting the position of the workpiece.

[0025] The workflow of the window frame trimming and shaping mold disclosed in this application is as follows:

[0026] First, the semi-finished window sealing workpiece to be processed is placed on the lower mold assembly using a robotic arm or manually. The upper mold assembly is then driven to move downwards. During the downward movement of the upper mold assembly, the first and second upper pressure cores first contact the workpiece surface, respectively pressing the main body of the workpiece and the part to be removed, thus achieving full-area pressing and fixing of the workpiece.

[0027] As the upper die assembly continues to descend, the first and second upper pressure cores, having already contacted the workpiece and been prevented from further descent, retract relative to the upper die body, while the upper die body continues to descend. At this point, the shaping cutter block fixed to the upper die body continues to descend, its upper die cutting edge engaging with the lower die cutting edge on the lower die assembly to separate the workpiece's uncut portion from the workpiece body, forming separate scrap and finished product.

[0028] The upper mold assembly continues to descend to the bottom dead center. At this point, the shaping working surface of the shaping blade block fits into the shaping support surface of the lower mold assembly, precisely shaping the finished window sill area to form the required window shape.

[0029] After shaping, the upper mold assembly begins its return stroke. During this return stroke, the ejector assembly on the second upper pressure core functions, pushing the waste material separated from the trimmed edges away from the upper mold assembly and keeping it stably on the lower mold assembly, preventing the waste material from being carried away by the upper mold assembly. At the same time, the finished product, under its own gravity and demolding force, synchronously detaches from the cavity and rests on the lower mold assembly.

[0030] Finally, the robotic arm on the automated production line simultaneously picks up the finished product and waste material using an end effector, and sends them to the next process and waste collection area respectively, completing the entire processing cycle for a single workpiece. Simultaneously, the finished workpiece detaches from the mold cavity under its own gravity and demolding force, resting on the lower mold assembly. Subsequently, the finished product and waste material are picked up simultaneously by the robotic arm or manually, and sent to the next process and waste collection area respectively, completing the entire work cycle.

[0031] Compared to related technologies, the window frame trimming and shaping mold disclosed in this application integrates trimming and shaping functions into a single mold. This eliminates the need to transfer workpieces between two separate molds, saving equipment investment and improving production efficiency. Only the shaping blade needs adjustment to achieve flexible modification from a sealed window to a visible window, significantly reducing mold development investment and production switchover costs. It also allows for compatibility with multiple vehicle models and product versions with a single mold. Furthermore, the ejector assembly ensures that scrap is stably retained in the lower mold assembly during the return stroke, allowing for simultaneous pickup of finished products and scrap by a robotic arm. This eliminates the need for a scrap cutter structure in traditional solutions, avoiding the damage to the part's surface caused by iron powder particles generated during scrap cutting, thus improving product quality. Simultaneously, there is no need to increase the mold height to ensure the scrap sliding angle, simplifying the mold structure and reducing manufacturing costs.

[0032] A method for processing window frames using a window frame trimming and shaping mold in any of the above possible implementations includes the following steps:

[0033] S10. Place the workpiece to be processed onto the lower mold assembly;

[0034] S20. Drive the upper mold assembly downwards, so that the first upper pressing core and the second upper pressing core respectively press the workpiece body and the workpiece to be cut off;

[0035] S30. Drive the upper mold assembly downward, and the cutting edge of the upper mold of the shaping cutter block cooperates with the cutting edge of the lower mold to cut and separate the part of the workpiece to be removed from the workpiece body, forming waste and finished product;

[0036] S40. The upper mold assembly continues to descend, and the shaping working surface of the shaping blade cooperates with the shaping support surface to shape a local area of ​​the finished product.

[0037] S50, the upper mold assembly returns upward, and the waste material is held on the lower mold assembly by the material ejection assembly, and the finished product is simultaneously removed and stays on the lower mold assembly;

[0038] S60. The finished product and the waste material are picked up simultaneously by an automatic pickup device.

[0039] The method provided in this application, having the aforementioned window frame trimming and shaping mold, possesses all the technical effects of the aforementioned window frame trimming and shaping mold, which will not be elaborated upon here. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the window frame trimming and shaping mold disclosed in the embodiments of this application;

[0042] Figure 2 This is a schematic diagram of the upper mold structure disclosed in the embodiments of this application;

[0043] Figure 3 This is a cross-sectional schematic diagram of the upper mold disclosed in the embodiments of this application;

[0044] Figure 4 This is a partial enlarged view of the upper mold disclosed in the embodiments of this application;

[0045] Figure 5 This is a schematic diagram of the lower mold structure disclosed in an embodiment of this application;

[0046] Figure 6 This is a cross-sectional schematic diagram of the window frame trimming and shaping mold disclosed in the embodiments of this application;

[0047] Figure 7 This is a partial enlarged view of the shaping blade block disclosed in the embodiments of this application;

[0048] Figure 8 This is a schematic diagram of the edge shaping of the workpiece disclosed in the embodiments of this application;

[0049] Figure 9 This is a partially enlarged view of the edge trimming and shaping of the workpiece disclosed in the embodiments of this application.

[0050] The attached figures are labeled as follows:

[0051] 10. Main body of the workpiece; 20. Part of the workpiece to be removed;

[0052] 100. Upper die assembly; 110. Upper die body; 120. First upper pressure core; 121. Elastic pressure element; 122. Side pin; 130. Shaping blade; 131. Shaping working surface; 132. Upper die cutting edge; 133. Bottom marking part; 140. Second upper pressure core; 141. Balance cylinder; 142. Stroke screw; 143. Guide post; 150. Unloading assembly; 151. Elastic unloading pin; 152. Limiting boss;

[0053] 200. Lower mold assembly; 210. First lower pressing core; 220. Second lower pressing core; 211. Wedge-shaped balance block; 212. Coarse positioning component; 213. Fine positioning component; 214. Mold limit block; 230. Material sensor. Detailed Implementation

[0054] The first aspect of this application is to disclose a window frame trimming and shaping mold to improve the forming quality and production efficiency of products in the window frame trimming and shaping process.

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] See Figures 1 to 7 As shown, the window frame trimming and shaping mold disclosed in this application includes an upper mold assembly 100 and a lower mold assembly 200, which work together to complete the window frame processing of external covering parts, such as side panel outer panels and tailgate outer panels.

[0057] The upper die assembly 100 includes an upper die body 110, and a first upper pressure core 120, a shaping cutter block 130, and a second upper pressure core 140 mounted on the upper die body 110. The shaping cutter block 130 is fixedly connected to the upper die body 110 and cannot move relative to it. One side of the shaping cutter block 130 has an upper die cutting edge 132, and the other side has a shaping working surface 131, both arranged in a stepped manner on the cutter block. The upper die cutting edge 132 protrudes a certain height relative to the shaping working surface 131 in the die-closing direction. The shaping cutter block 130 can be made of die steel and subjected to flame heat treatment to achieve a hardness of HRC55 to HRC60. This heat treatment process gives the shaping cutter block 130 both excellent cutting edge sharpness and structural strength, while the hardness of its shaping working surface 131 is sufficient to withstand repeated extrusion molding without wear, effectively avoiding surface roughening defects during mass production.

[0058] The first upper pressure core 120 and the second upper pressure core 140 are movably mounted on the upper mold body 110 through their respective connecting mechanisms, and can be displaced relative to the upper mold body 110 during the mold closing process. The first upper pressure core 120 is used to press the workpiece body 10, and the second upper pressure core 140 is used to press the workpiece to be cut off part 20. The two work together to achieve full-area pressing of the workpiece.

[0059] The lower die assembly 200 is provided with a lower die cutting edge that mates with the upper die cutting edge 132, and a shaping support surface that mates with the shaping working surface 131. The lower die cutting edge and the shaping support surface can be integrated into the same component or set on different components according to the actual design, as long as the corresponding functions can be achieved.

[0060] The second upper pressing core 140 is provided with a material ejection component 150, which functions during the return stroke of the upper die assembly 100. When the upper die assembly 100 moves upward, the material ejection component 150 pushes the waste material after edge separation away from the upper die assembly 100, so that it is stably retained on the lower die assembly 200, preventing the waste material from being carried away by the upper die assembly 100.

[0061] The workflow of the window frame trimming and shaping mold disclosed in this application is as follows:

[0062] First, the semi-finished window sealing workpiece to be processed is placed on the lower mold assembly 200 by a robotic arm or manually. The upper mold assembly 100 is then driven to move downwards. During the downward movement of the upper mold assembly 100, the first upper pressing core 120 and the second upper pressing core 140 first contact the workpiece surface, respectively pressing the workpiece body 10 and the workpiece to be cut off 20, thereby achieving full-area pressing and fixing of the workpiece.

[0063] As the upper die assembly 100 continues to descend, the first upper pressure core 120 and the second upper pressure core 140 have already contacted the workpiece and are prevented from continuing to descend, while the upper die body 110 is still descending. Therefore, the first upper pressure core 120 and the second upper pressure core 140 retract relative to the upper die body 110. At this time, the shaping cutter block 130 fixed to the upper die body 110 continues to descend, and its upper die cutting edge 132 cooperates with the lower die cutting edge on the lower die assembly 200 to cut and separate the workpiece to be removed 20 from the workpiece body 10, forming separate waste material and finished product.

[0064] The upper mold assembly 100 continues to descend to the bottom dead center. At this point, the shaping working surface 131 of the shaping blade block 130 fits into the shaping support surface of the lower mold assembly 200, precisely shaping the finished window sill area to form the required window shape.

[0065] After shaping, the upper mold assembly 100 begins its return stroke. During the return stroke, the ejector assembly 150 on the second upper pressure core 140 functions to push the waste material separated from the trimmed edges away from the upper mold assembly 100, ensuring it remains stably on the lower mold assembly 200 and preventing the waste material from being carried away by the upper mold assembly 100. Simultaneously, the finished product, under its own gravity and demolding force, synchronously detaches from the cavity and rests on the lower mold assembly 200.

[0066] Finally, the robotic arm on the automated production line simultaneously picks up the finished product and waste material using an end effector, and sends them to the next process and waste collection area respectively, completing the entire processing cycle for a single workpiece. Simultaneously, the finished workpiece detaches from the mold cavity under its own gravity and demolding force, resting on the lower mold assembly 200. Subsequently, the finished product and waste material are picked up simultaneously by the robotic arm or manually, and sent to the next process and waste collection area respectively, completing the entire work cycle.

[0067] Compared to related technologies, the window frame trimming and shaping mold disclosed in this application integrates trimming and shaping functions into a single mold. This eliminates the need to transfer workpieces between two independent molds, saving equipment investment and improving production efficiency. Only the shaping blade 130 needs adjustment to achieve flexible modification from a sealed window to a visible window, significantly reducing mold development investment and production switchover costs. This allows a single mold to be compatible with multiple vehicle models and product versions. Furthermore, the ejector assembly 150 ensures that scrap is stably retained in the lower mold assembly 200 during the return stroke, allowing for simultaneous pickup of finished products and scrap by a robotic arm. This eliminates the need for a scrap cutter structure in traditional solutions, avoiding the damage to the part's surface caused by iron powder particles generated during scrap cutting, thus improving product quality. Simultaneously, there is no need to increase the mold height to ensure the scrap slip angle, simplifying the mold structure and reducing manufacturing costs. In addition, full-area pressing and precise timing control ensure the dimensional stability and surface consistency of large covering parts during processing.

[0068] Reference Figure 3 and Figure 4The ejector assembly 150 may include a resilient ejector pin 151. The resilient ejector pin 151 is installed inside the second upper pressure core 140 and can freely extend and retract along its own axial direction. In the initial state, the end of the resilient ejector pin 151 that contacts the scrap material protrudes from the working surface of the second upper pressure core 140. During mold closing, when the second upper pressure core 140 descends to press the workpiece to be cut 20, the resilient ejector pin 151 is compressed by the scrap material and retracts, compressing its internal elastic element. When the trimming action is completed and the upper mold assembly 100 begins its return stroke, the second upper pressure core 140 gradually detaches from the scrap surface. At this time, the resilient ejector pin 151 extends outward under the action of elastic restoring force, applying a downward pushing force to the scrap material, forcing the scrap material to detach from the upper mold assembly 100 and remain on the second lower pressure core 220. This effectively prevents scrap material from being carried along due to the rapid return speed of the upper mold assembly 100 or fluctuations in the air pressure within the cavity. The 151 elastic ejector pin has a simple structure and rapid response, adapting to the slight undulations on the waste material surface and maintaining a stable ejection force. Furthermore, its compact installation does not occupy additional mold space, facilitating the overall miniaturization of the mold design.

[0069] Based on the above embodiments, the ejector assembly 150 may further include a limiting boss 152. The limiting boss 152 is installed in the second upper pressure core 140, and its working end face also protrudes from the working surface of the second upper pressure core 140. Correspondingly, a limiting groove is formed on the lower die assembly 200 at the position corresponding to the limiting boss 152. During the mold closing process, when the second upper pressure core 140 presses the workpiece to be cut 20, the protruding limiting boss 152 punches a partial protrusion on the surface of the workpiece to be cut 20. This protrusion fits precisely into the limiting groove on the lower die assembly 200. The cooperation between the two restricts the horizontal displacement of the workpiece to be cut 20, i.e., the waste material formed after trimming, relative to the lower die assembly 200, thereby preventing the waste material from shifting or deviating on the mold.

[0070] The installation height of the limiting boss 152 is adjustable. It can be achieved through threaded connection or other adjustable connection methods, allowing operators to precisely adjust the height of the working end face of the limiting boss 152 protruding from the working surface of the second upper pressure core 140 according to actual production needs. This adjustable height of the limiting boss 152 allows operators to flexibly adjust the protrusion depth based on the workpiece material and thickness, ensuring effective positioning while preventing excessive deformation of the scrap. The elastic ejector pin 151 provides the ejection force to push the scrap away from the upper die, while the limiting boss 152 ensures that the scrap remains stably in the predetermined position after leaving the upper die. Together, they ensure the reliability and consistency of scrap retention in the die.

[0071] like Figure 7As shown, the preset height t of the upper die cutting edge 132 protruding from the forming working surface 131 along the mold closing direction of the upper die assembly 100 is denoted as 3mm to 7mm, with a preferred value of 5mm. This reasonable preset height ensures that the upper die cutting edge 132 contacts the workpiece before the forming working surface 131 in the mold closing direction, realizing a processing technology of cutting the edge first and then forming. Before the forming process, the finished product and waste material are completely separated, eliminating the material entanglement between them. This fundamentally avoids defects such as material tearing, cracking, or denting on the appearance surface caused by insufficient material elongation under large forming conditions, significantly improving product molding quality and yield.

[0072] Meanwhile, the preset width of the upper die cutting edge 132 is denoted as G, and is set within the range of 8mm to 12mm, with a preferred value of 10mm. The cutting edge width is related to the cutting edge quality and cutting edge strength. If the width is too narrow, the cutting edge strength will be insufficient, and it will be prone to chipping. If the width is too wide, the cutting edge resistance will increase, affecting the cutting edge accuracy. A suitable cutting edge width achieves a balance between strength and cutting performance, ensuring the cutting edge quality while also taking into account the service life of the cutting edge.

[0073] To facilitate intuitive and convenient product quality inspection, a bottom marking portion 133 is provided on the shaping working surface 131. This bottom marking portion 133 is annular and protrudes approximately 0.5mm above the surface of the shaping working surface 131. It is located in the non-appearance area of ​​the workpiece. When the upper mold assembly 100 descends to the bottom dead center for shaping, the shaping working surface 131 engages with the shaping support surface of the first lower pressure core 210, precisely shaping the window sill area of ​​the workpiece. During this process, the protruding bottom marking portion 133 leaves a shallow circular imprint in the non-appearance area of ​​the workpiece, such as a hidden area inside the window frame. After production, operators can quickly determine whether the mold closing stroke is complete and whether the window frame depth meets design requirements by checking the clarity and depth of this imprint, significantly improving process quality control efficiency. Furthermore, since the marking is located in a non-appearance area, it does not affect the product's appearance quality or cause any adverse effects on subsequent processes.

[0074] In one specific embodiment, the first upper pressure core 120 is movably mounted to the upper mold body 110 via a side pin 122. The side pin 122 allows the first upper pressure core 120 to float up and down relative to the upper mold body 110 within a certain range. An elastic pressure element 121, which can be a nitrogen spring, is also provided between the back of the first upper pressure core 120 and the upper mold body 110. During the mold closing process, when the upper mold assembly 100 descends to the point where the first upper pressure core 120 contacts the workpiece body 10, the first upper pressure core 120 stops descending, while the upper mold body 110 continues to descend. At this time, the elastic pressure element 121 is compressed, continuously applying a downward pressure force to the first upper pressure core 120, ensuring that the first upper pressure core 120 always presses the workpiece body 10 with a constant pressure. This prevents the workpiece from deforming during processing, thus avoiding affecting the dimensional accuracy and surface quality of the final product. The side pin 122 ensures that the first upper pressure core 120 is stable in the horizontal direction and prevents it from shifting, thus ensuring both the floating adaptability of the pressure core and its positional accuracy.

[0075] like Figure 3 and Figure 4 As shown, the second upper pressure core 140 is mounted on the upper mold body 110 via multiple sets of balancing cylinders 141 and multiple sets of stroke screws 142. Specifically, the second upper pressure core 140 may have four sets of balancing cylinders 141 and four sets of stroke screws 142. Furthermore, the second upper pressure core 140 is slidably connected to the upper mold body 110 via guide posts 143. During mold closing, when the upper mold assembly 100 descends to the point where the second upper pressure core 140 contacts the workpiece to be removed 20, the second upper pressure core 140 stops descending, while the upper mold body 110 continues to descend. At this time, the balancing cylinders 141 are compressed, providing a balanced distribution of pressure force, preventing uneven pressure force from causing changes in the cutting edge clearance of the upper mold cutting edge 132, thus affecting cutting accuracy and cutting edge life. The stroke screws 142 serve as limiters and guides, preventing the second upper pressure core 140 from excessively retracting. The guide post 143 ensures that the second upper pressure core 140 remains horizontal during its up-and-down movement, without tilting or deflection, further ensuring uniform and consistent blade clearance and effectively preventing uneven loading and movement of the mold.

[0076] Because the process sequence of trimming before shaping is adopted, the material will flow during the shaping process. The amount of flow is denoted as D. Figure 8 and Figure 9 As shown, the dashed outline is the cut edge outline before shaping, and the solid outline is the cut edge outline after shaping. In a specific preferred embodiment, the depth of the windowsill is denoted as H. When H is 15mm, the material flow D before shaping is approximately 5mm. That is, the cut edge outline needs to be offset inward by a value D from the final product outline to compensate for the material flow during shaping.

[0077] The stroke W of the balancing cylinder 141 equipped with the second upper pressure core 140 must satisfy W>H+t. This design ensures that during the mold closing process, the balancing cylinder 141 has sufficient stroke margin, allowing it to continue being compressed after the second upper pressure core 140 presses the workpiece to be cut off 20, enabling the shaping cutter block 130 to continue descending to complete the trimming and shaping actions. In addition, the output pressure of the balancing cylinder 141 is set to 1.5 times the material deformation force, which not only effectively suppresses the material flow tendency during the shaping process, preventing workpiece slippage or warping, but also avoids excessively deep indentations on the workpiece surface or excessive mold load, enabling the mold to operate stably for a long time and produce products with consistent dimensions and excellent surface finish.

[0078] like Figure 5 As shown, the lower die assembly 200 includes two independent components: a first lower pressure core 210 and a second lower pressure core 220. The first lower pressure core 210 supports the workpiece body 10, and its upper surface is provided with a shaping support surface that mates with the shaping working surface 131 of the shaping cutter block 130. The second lower pressure core 220 supports the part of the workpiece to be removed 20, and it is provided with a lower die cutting edge that mates with the upper die cutting edge 132 of the shaping cutter block 130. The separate design of the first lower pressure core 210 and the second lower pressure core 220 allows them to be processed and maintained independently, reducing manufacturing difficulty and maintenance costs.

[0079] The second lower pressure core 220 has a vent hole inside, which penetrates the second lower pressure core 220, connecting one end to its working surface and the other end to the outside atmosphere. During the stamping process, when the second upper pressure core 140 presses against the workpiece to be removed 20, a sealed space is formed between the second lower pressure core 220 and the workpiece. As the upper die continues to descend, the volume of this sealed space decreases, and the internal air is compressed. The presence of the vent hole provides a channel for the compressed air to escape, preventing the accumulation of air and the formation of high pressure, which could cause bulges or dents on the workpiece surface, or cause waste material to adhere to the second lower pressure core 220 and become unable to detach.

[0080] To improve the downward pressing stability of the first upper pressing core 120, a wedge-shaped balance block 211 is provided on the first lower pressing core 210. The wedge-shaped balance block 211 is installed at the four corners of the first lower pressing core 210, and its inclined surface matches the corresponding inclined surface on the first upper pressing core 120. When the upper mold assembly 100 moves downward and the first upper pressing core 120 contacts the wedge-shaped balance block 211, the inclined surface cooperation between the two generates horizontal and vertical force components, guiding the first upper pressing core 120 to press down smoothly and automatically center, ensuring a uniform distribution of pressing force.

[0081] In addition, the first pressing core 210 is also equipped with a fine positioning component 213 and a coarse positioning component 212. The coarse positioning component 212 is located at the edge contour of the first pressing core 210 to provide a rough positioning reference when the workpiece is initially placed, ensuring that the workpiece falls into the correct working area. The fine positioning component 213 is located at a key position on the surface of the first pressing core 210 to accurately align the workpiece body 10 before pressing, ensuring the relative positional accuracy between the workpiece and the mold surface. The cooperation of the fine positioning component 213 and the coarse positioning component 212 shortens the workpiece clamping time and improves production efficiency.

[0082] To precisely control the downward stroke of the upper mold assembly 100, mold limiting blocks 214 are provided at the four corners of the lower mold assembly 200. The mold limiting blocks 214 are solid steel structures with high hardness and wear resistance. When the upper mold assembly 100 descends to the bottom dead center, the lower surface of the upper mold body 110 contacts the upper surface of the mold limiting block 214, thereby limiting further downward movement of the upper mold assembly 100. By adjusting the height of the mold limiting blocks 214, the mold closing stroke can be precisely controlled, thus ensuring the dimensional accuracy of the cutting edge infeed and shaping amount. The mold limiting blocks 214 provide a rigid mechanical limiting reference, avoiding the error accumulation problem associated with stroke control relying on hydraulic or pneumatic systems, thereby ensuring consistent processing accuracy for each product.

[0083] To achieve automated closed-loop control of the stamping process, a material sensor 230 is provided on the lower die assembly 200. This material sensor 230 may include a sensor located at the profile position of the first lower die core 210 and a sensor built into the second lower die core 220. The sensor at the profile position of the first lower die core 210 can be used to identify whether the workpiece body 10 has been correctly placed in place, while the sensor in the second lower die core 220 can be used to monitor the placement and gripping status of scrap material.

[0084] Specifically, when the workpiece body 10 is placed on the lower die assembly 200 by a robot or manually, the sensor at the surface position of the first lower blanking core 210 detects the workpiece's arrival signal and sends it to the control system. Upon receiving the signal, the control system confirms the workpiece is in place and then starts the press to drive the upper die assembly 100 downwards. After stamping, the sensor in the second lower blanking core 220 detects whether the scrap material is stably stationary on the second lower blanking core 220. When the robot simultaneously picks up the scrap material, the sensor in the second lower blanking core 220 detects that the scrap material has been removed and sends a signal to the control system, allowing the next workpiece to enter the processing cycle. By monitoring the workpiece placement and scrap material pickup status in real time, the control system can accurately determine whether each step of the process is completed, thereby automatically coordinating the timing of the press and robot's actions. This not only improves production efficiency but also avoids die damage accidents caused by improper workpiece placement or scrap material residue, enhancing production safety and reliability.

[0085] The first aspect of this application discloses a method for processing window frames using a window frame trimming and shaping mold in any of the aforementioned possible embodiments, comprising the following steps:

[0086] S10. The workpiece to be processed is placed on the lower mold assembly 200 by means of a robot or manual operation.

[0087] S20. The control system starts the press, driving the upper die assembly 100 to move downwards. The upper die assembly 100 first moves downwards until the first upper pressing core 120 and the second upper pressing core 140 contact the workpiece body 10 and the workpiece to be cut off 20, respectively. The workpiece is fully pressed, preparing it for subsequent trimming and shaping processes.

[0088] S30, the upper die assembly 100 continues to descend. Since the first upper pressure core 120 and the second upper pressure core 140 have contacted the workpiece and are prevented from continuing to descend, while the upper die body 110 is still descending, the first upper pressure core 120 and the second upper pressure core 140 retract relative to the upper die body 110. At this time, the shaping cutter block 130 fixed to the upper die body 110 continues to descend, and its upper die cutting edge 132 first contacts the part of the workpiece to be cut 20, and cooperates with the lower die cutting edge on the lower die assembly 200 to cut and separate the part of the workpiece to be cut 20 from the workpiece body 10, forming independent waste and finished products.

[0089] S40, the upper mold assembly 100 continues to descend to the bottom dead center. At this time, the shaping working surface 131 of the shaping blade block 130 fits with the shaping support surface of the lower mold assembly 200, and the finished window sill area is precisely shaped to form the required window shape.

[0090] S50. After shaping, the upper mold assembly 100 begins its return stroke. During the initial return stroke, the second upper pressure core 140 gradually detaches from the waste material surface. At this time, the ejector assembly 150 applies a downward pushing force to the waste material, causing it to detach from the upper mold assembly 100 and remain stably on the lower mold assembly 200. Simultaneously, the finished product, under its own gravity and demolding force, synchronously detaches from the cavity and remains on the lower mold assembly 200.

[0091] S60. An automatic picking device, such as a robot arm on an automated production line, moves an end effector to above the mold. The robot arm simultaneously picks up finished products and waste materials using suction cups on the end effector, and sends them to the next process and the waste collection area respectively, thus completing the entire processing of a single workpiece.

[0092] The method provided in this application, having the aforementioned window frame trimming and shaping mold, possesses all the technical effects of the aforementioned window frame trimming and shaping mold, which will not be elaborated upon here.

[0093] The terms "first" and "second," etc., used in this application are used to distinguish different objects, not to describe a specific order, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. 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 may include steps or units not listed, but rather steps or units not listed.

[0094] In the description of this application, it should be understood that the terms "height," "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.

[0095] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A window frame trimming and shaping mold, characterized in that, Includes an upper mold assembly (100) and a lower mold assembly (200); The upper mold assembly (100) includes an upper mold body (110), and a shaping blade (130), a first upper pressure core (120), and a second upper pressure core (140) disposed on the upper mold body (110); the shaping blade (130) has a shaping working surface (131) and an upper mold cutting edge (132), and the upper mold cutting edge (132) contacts the workpiece before the shaping working surface (131) in the mold closing direction; The lower die assembly (200) is provided with a lower die cutting edge that cooperates with the upper die cutting edge (132) and a shaping support surface that cooperates with the shaping working surface (131); The first upper pressure core (120) is used to press the workpiece body (10), and the second upper pressure core (140) is used to press the part of the workpiece to be cut off (20). The second upper pressure core (140) is provided with a material ejection assembly (150), which is used to retain the waste material formed by the cutting edge on the lower die assembly (200) when the upper die assembly (100) returns.

2. The window frame trimming and shaping mold as described in claim 1, characterized in that, The ejector assembly (150) includes an elastic ejector pin (151) that is movable along its own axial direction; the end of the elastic ejector pin (151) that is in contact with the waste material protrudes from the working surface of the second upper pressing core (140).

3. The window frame trimming and shaping mold as described in claim 2, characterized in that, The unloading assembly (150) further includes a limiting boss (152), the working end face of which protrudes beyond the working surface of the second upper pressing core (140); the limiting boss (152) is adjustablely installed in the second upper pressing core (140), and the height of the working end face of the limiting boss (152) protruding beyond the working surface of the second upper pressing core (140) can be adjusted; The lower mold assembly (200) is provided with a limiting groove corresponding to the position of the limiting boss (152).

4. The window frame trimming and shaping mold as described in claim 1, characterized in that, The upper die cutting edge (132) protrudes a preset height relative to the forming working surface (131) along the mold closing direction of the upper die assembly (100), the preset height being 3mm to 7mm; the upper die cutting edge (132) has a preset width, the preset width being 8mm to 12mm.

5. The window frame trimming and shaping mold as described in claim 1, characterized in that, The shaping working surface (131) is provided with a bottom marking part (133), which protrudes from the shaping working surface (131).

6. The window frame trimming and shaping mold as described in claim 1, characterized in that, The first upper pressure core (120) is movably installed on the upper mold body (110) via a side pin (122), and an elastic pressure element (121) is also provided between the first upper pressure core (120) and the upper mold body (110).

7. The window frame trimming and shaping mold as described in claim 1, characterized in that, The second upper pressure core (140) is installed on the upper mold body (110) through multiple sets of balance cylinders (141) and multiple sets of stroke screws (142), and is slidably connected to the upper mold body (110) through guide post (143).

8. The window frame trimming and shaping mold as described in claim 1, characterized in that, The lower die assembly (200) includes a first lower pressing core (210) and a second lower pressing core (220). The first lower pressing core (210) is used to support the workpiece body (10) and is provided with the shaping support surface. The second lower pressing core (220) is used to support the workpiece to be cut off part (20) and is provided with the lower die cutting edge. The second lower pressing core (220) is provided with a vent hole.

9. The window frame trimming and shaping mold as described in claim 8, characterized in that, The first pressing core (210) is provided with a wedge-shaped balance block (211), which is used to cooperate with the first pressing core (120) to guide the first pressing core (120) to press down smoothly; The first pressing core (210) is also provided with a fine positioning component (213) and a coarse positioning component (212) for positioning the workpiece body (10).

10. The window frame trimming and shaping mold as described in claim 1, characterized in that, The lower mold assembly (200) is also provided with a mold limiting block (214), which is used to contact the upper mold body (110) when the mold is closed to the top dead center, so as to limit the downward limit position of the upper mold assembly (100).

11. The window frame trimming and shaping mold as described in claim 1, characterized in that, The lower mold assembly (200) is provided with a material sensor (230), which is used to detect the position of the workpiece.

12. A method for processing window frames using the window frame trimming and shaping mold according to any one of claims 1 to 11, characterized in that, Includes the following steps: S10. Place the workpiece to be processed on the lower mold assembly (200); S20. Drive the upper mold assembly (100) downward so that the first upper pressure core (120) and the second upper pressure core (140) press the workpiece body (10) and the workpiece to be cut off (20) respectively. S30, drive the upper mold assembly (100) downward, the upper mold cutting edge (132) of the shaping blade block (130) cooperates with the lower mold cutting edge to cut the workpiece to be removed (20) from the workpiece body (10) to form waste and finished product; S40, the upper mold assembly (100) continues to descend, and the shaping working surface (131) of the shaping blade block (130) cooperates with the shaping support surface to shape a local area of ​​the finished product; S50, the upper mold assembly (100) returns upward, and the waste material is held on the lower mold assembly (200) by the unloading assembly (150), and the finished product is simultaneously removed and stays on the lower mold assembly (200); S60. The finished product and the waste material are picked up simultaneously by an automatic pickup device.

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