Cold bending forming die and forming method of multi-layer sealing groove aluminum alloy door and window profile

Abstract

The present application belongs to the technical field of aluminum profile bending forming die, in particular to a cold bending forming die and forming method for multilayer sealing groove aluminum alloy door and window profile, which comprises a punch, an upper die plate, a movable die, a die holder, a lower die plate and a filling structure inserted into the door and window profile; in the cold bending forming process, the movable die is adjusted in rotation according to the pressing action of the punch to better cooperate with the bending deformation of the profile; and since the filling structure is composed of multilayer elastic metal steel sheets, the multilayer elastic metal steel sheets not only ensure arbitrary bending but also ensure that the thickness is not compressed, thereby making it easy to bend and having good support, and thus when the profile is cold bent, it can not only adapt to the shape change of the sealing groove, but also ensure the shape stability of the sealing groove in the forming process, thereby preventing the profile from being broken or excessively deformed due to uneven local stress.

Description

Technical Field

[0001] This invention belongs to the field of aluminum profile bending forming mold technology, specifically the cold bending forming mold and forming method for multi-layer sealing groove aluminum alloy door and window profiles. Background Technology

[0002] In the traditional cold bending forming process of aluminum alloy door and window profiles, there are several problems that urgently need to be solved. For example, conventional molds are not well-suited for forming profiles with multi-layer sealing grooves, making it difficult to achieve the ideal precision of the sealing grooves, thus affecting the overall sealing performance of the doors and windows. During the cold bending process, some traditional molds have high friction between the profile and the mold, which not only increases the risk of surface scratches on the profile but may also lead to uneven deformation of the profile, reducing the product yield.

[0003] Furthermore, early cold bending forming methods largely relied on manual experience to control pressure and stroke, lacking precise parametric control, resulting in low production efficiency and poor quality stability between different batches of products. Moreover, the previous filling structures either struggled to adapt to the complex shape changes of the sealing groove or failed to provide sufficient support when the profiles were bent, making the profiles prone to defects such as cracking or excessive deformation, seriously affecting the quality and service life of doors and windows.

[0004] Addressing these industry pain points, the cold-bending forming mold and method for multi-layer sealing groove aluminum alloy door and window profiles proposed in this invention possess significant innovation and practicality. Its unique movable die design and the filling structure composed of multiple layers of elastic metal sheets effectively solve problems such as insufficient forming precision of the sealing groove and easy deformation of the profiles in traditional processes. This represents a new breakthrough in the cold-bending forming process of aluminum alloy door and window profiles and is expected to drive the upgrading and development of related technologies within the industry. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a cold-bending forming mold and forming method for multi-layer sealing groove aluminum alloy door and window profiles. This invention primarily addresses the problem that in existing cold-bending forming molds for aluminum alloy door and window profiles, the filling structure either struggles to adapt to the complex shape changes of the sealing groove or fails to provide sufficient support during profile bending, leading to defects such as profile cracking or excessive deformation, which seriously affects the quality and service life of doors and windows.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: This invention provides a cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles, including a punch, an upper template, a movable die, a die support, a lower template, and a filling structure inserted into the door and window profile; the upper template is installed on the movable end of a press; the upper end of the punch is fixedly connected to the upper template; the lower template is installed on the worktable of the press; the die supports are symmetrically arranged on the lower template; the lower end of the die supports is fixedly connected to the lower template; the upper end of the die supports is hinged to the movable die; the filling structure is composed of multiple layers of elastic metal steel sheets; the filling structure fills the multi-layer sealing groove on the door and window profile.

[0007] During operation, the press drives the upper die plate downwards, causing the punch to descend and cold-bend the window / door profile placed on the die support and supported by the movable die. During this process, the movable die rotates and adjusts according to the downward movement of the punch to better accommodate the bending deformation of the profile. Because the filling structure is composed of multiple layers of elastic steel sheets, it can be bent arbitrarily without compression, resulting in both flexibility and excellent support. This allows it to adapt to changes in the shape of the sealing groove during cold bending while maintaining its shape stability, preventing cracking or excessive deformation due to uneven stress. After the cold bending operation is complete, the press drives the upper die plate upwards, and the punch leaves the profile. The filling structure can then be removed from the formed window / door profile sealing groove for the next cold bending operation. Due to the elasticity of the steel sheets, the filling structure maintains good performance even after multiple uses, reducing production costs. Throughout the cold bending forming process, operators must strictly control the pressure and stroke of the press to ensure that each formed profile meets the design requirements for precision and quality standards, thereby achieving efficient and stable production of multi-layer sealing groove aluminum alloy door and window profiles.

[0008] Preferably, lubricating oil is applied between the metal steel sheets of the filling structure.

[0009] By applying lubricating oil between the metal sheets of the filling structure, on the one hand, the friction between the metal sheets is greatly reduced. When the filling structure bends and deforms during cold bending of the profile, the wear caused by friction between the steel sheets is reduced, further extending the service life of the filling structure. This ensures that the filling structure maintains good performance during long-term cold bending operations. Moreover, the reduced friction between the metal sheets makes the filling structure easier to bend, thereby reducing the difficulty of cold bending the profile. On the other hand, reducing friction helps the filling structure move more smoothly in the sealing groove. Whether it is filling into the sealing groove or removing it from the sealing groove after the cold bending operation, it is more convenient, which helps to improve overall production efficiency.

[0010] In addition, lubricating oil is applied between the metal steel sheets of the filling structure, so that the metal steel sheets are pressed together by atmospheric pressure, thereby giving the filling structure a certain strength along the length direction, which makes it easier to insert the filling structure into the sealing groove of the door and window profile.

[0011] Preferably, the metal steel sheet of the filling structure is made of magnetic 410 stainless steel. The magnetism further increases the adhesion between the metal steel sheets, further strengthens the filling structure along its length, and further facilitates the insertion of the filling structure into the sealing groove of the door and window profile.

[0012] Preferably, the two movable dies are connected by a synchronization mechanism; the synchronization mechanism is used to make the two movable dies rotate synchronously.

[0013] During operation, if the two movable dies do not rotate synchronously when the punch presses down for cold bending, the force on both sides of the profile will be uneven, affecting the bending accuracy and quality. This can result in over-bending on one side and under-bending on the other, and in severe cases, even scrapping the profile. The synchronization mechanism effectively avoids this problem. The synchronization mechanism can use chain drive or gear drive to connect the two movable dies, ensuring they rotate synchronously during the punch's pressing process. This results in uniform force on both sides of the profile, guaranteeing good symmetry and accuracy in the cold-bent profile. In long-term production, the synchronization mechanism needs regular inspection and maintenance, such as checking the chain tension and gear wear, and adjusting or replacing relevant components as needed to ensure it is always in good working condition. This guarantees the smooth cold bending of multi-layer sealing groove aluminum alloy door and window profiles, further improving production efficiency and product quality, and meeting market demand for high-quality aluminum alloy door and window profiles.

[0014] Preferably, the synchronization mechanism includes a first gear, a second gear, a third gear, a transmission rod, a limiting plate, a first spring, a fourth gear, and a fifth gear; the first gear is fixedly connected to the hinge shaft end of one of the movable die concave molds; the second gear, the third gear, and a rack structure at one end of the transmission rod are sequentially engaged below the first gear; the transmission rod is restricted from sliding along the length direction of the lower mold plate by the limiting plate; the limiting plate is fixedly connected to the lower mold plate; the fifth gear and the fourth gear are sequentially engaged above the rack structure at the other end of the transmission rod; the fourth gear is fixedly connected to the hinge shaft end of the other movable die concave mold; a first spring is provided between the other end of the transmission rod and the die concave mold support; the first spring is in a compressed state.

[0015] During operation, when the punch is pressed down, one of the movable dies begins to rotate. The first gear, which is fixedly connected to the hinge shaft end of the movable die, rotates accordingly. The first gear drives the second gear meshing with it to rotate, and the second gear drives the third gear to rotate. This causes the rack structure at one end of the transmission rod to be stressed. Under the restriction of the limiting plate, the transmission rod slides along the length of the lower template. During the sliding process of the transmission rod, the rack structure at the other end pushes the fifth gear meshing with it to rotate. The fifth gear then drives the fourth gear to rotate. Since the fourth gear is fixedly connected to the hinge shaft end of another movable die, the synchronous rotation of the two movable dies is achieved.

[0016] During this process, the first spring is under compression, and its function is to provide a reverse elastic force to the transmission rod. After the processed profile is removed, the reverse elastic force can be used to make the movable die automatically return to a horizontal state, which makes it easier to place the profile on the movable die again, thus improving convenience.

[0017] Preferably, an elastic lifting structure is provided on the high step surface of the movable die; the lifting force of the elastic lifting structure is greater than the weight of the door and window profile; a telescopic mechanism is provided on one side of the movable die; the telescopic mechanism is used to push the door and window profile to fit against the step surface of the punch and the step surface of the movable die.

[0018] During operation, an elastic lifting structure is installed on the high step surface of the movable die. When the door and window profile is placed on the movable die, the elastic lifting structure lifts the profile from one side, causing it to tilt. When the upper die moves the punch downward, the tilted profile ensures that the step surface on the punch will not collide with the step on the profile, thus improving the safety of the equipment operation. When the step surface on the die enters the step on the profile and before the profile is pressed, the controller controls the telescopic mechanism to push forward, thus pressing the profile laterally from the side. This causes the step on the profile to fit against the step surface of the punch and the step surface of the movable die. Then, the controller controls the press to continue moving downward, and the die presses the profile downward. During this process, the profile is pressed downward by the elastic lifting structure. When the profile is pressed between the punch and the movable die, the controller controls the telescopic mechanism to retract. As the press continues to press down, the profile is cold-bent. The combination of the elastic lifting structure and the telescopic mechanism ensures that the punch will not collide with the door and window profiles when it is pressed down, thus ensuring safety; it also ensures that the door and window profiles are in close contact with the punch and the movable die when the punch is pressed down, thus ensuring processing accuracy.

[0019] Preferably, the elastic lifting structure includes a second spring and a sliding column; the sliding column is slidably connected to a blind hole on the movable die; the second spring is disposed below the sliding column; the telescopic mechanism includes a support plate, a cylinder, a guide column, and a top plate; the lower end of the support plate is fixedly connected to the lower template; the top plate is disposed on the upper end of the support plate near the movable die; the top plate is slidably connected to the support plate via two guide columns; the middle part of the top plate is fixedly connected to the end of the cylinder rod of the cylinder; the cylinder is fixedly connected to the support plate.

[0020] During operation, when the window / door profile is placed on the movable die, the second spring is compressed, providing an upward force to the sliding column, thus lifting the profile and causing it to tilt. When the punch presses down to a certain position, the cylinder activates, and the cylinder rod pushes the top plate along the guide post towards the window / door profile. The top plate contacts and presses the profile, causing its steps to align with the steps of the punch and the movable die. When the profile is pressed between the punch and the movable die, the cylinder rod retracts, resetting the top plate. Throughout this process, the guide post acts as a guide, ensuring the stability of the top plate's movement and guaranteeing accurate pressing.

[0021] In actual production, the performance of the elastic lifting structure and telescopic mechanism needs to be checked regularly. For the elastic lifting structure, it is necessary to check whether the elasticity of the second spring has weakened. If the spring elasticity is insufficient, it may lead to insufficient lifting height of the door and window profiles, thus affecting the safety and fitting accuracy when the punch is pressed down. For the telescopic mechanism, it is necessary to check the sealing of the cylinder and the wear of the guide column. If the cylinder seal is poor, it may lead to insufficient air pressure, affecting the pressing force of the top plate. Through regular inspection and maintenance, it is ensured that the elastic lifting structure and telescopic mechanism are always in good working condition, further guaranteeing the quality and efficiency of cold bending forming of multi-layer sealing groove aluminum alloy door and window profiles.

[0022] Preferably, the cold bending forming mold further includes an insertion mechanism; the insertion mechanism includes a support frame, a fixed plate, a linear drive component, a push plate, a slider, a guide plate, and a pull rope; the upper end of the support frame is fixedly connected to the fixed plate; the fixed plate is provided with a linear drive component along its length; the linear drive component is a linear motion component driven by a lead screw and a motor; the linear drive component is used to drive the push plate to move; the push plate is provided with a positioning groove corresponding to the sealing groove of the door and window profile; multiple sliders are slidably connected on the linear guide rail of the linear drive component; a guide plate is provided on the slider; the guide plate is provided with a guide groove corresponding to the sealing groove of the door and window profile; the pull rope is sequentially fixedly connected to all the guide plates; one end of the pull rope is fixedly connected to the push plate; the other end of the pull rope is fixedly connected to one end of the fixed plate.

[0023] During operation, the filling structure is placed in the guide groove of the guide plate, and the linear drive is activated. The motor drives the lead screw to rotate, causing the push plate to move along the linear guide rail. During the movement of the push plate, the filling structure is smoothly pushed into the sealing groove of the door and window profile. The positioning groove and guide groove ensure the accuracy of the filling structure's position during the pushing process, prevent it from shifting, and ensure that the filling structure can be accurately inserted into the sealing groove.

[0024] After the profile is cold-bent, the linear drive is activated in reverse, the push plate moves in the opposite direction, and the pull rope drives the guide plate back. At this time, the filling structure, due to its own elasticity and the friction between the inner wall of the sealing groove, will remain in the sealing groove, to be removed in subsequent operations. The use of the insertion mechanism automates the insertion process of the filling structure, greatly improving insertion efficiency and accuracy compared to manual insertion, and reducing errors that may be caused by manual operation. At the same time, it also reduces the labor intensity of operators, making the entire process of cold bending aluminum alloy door and window profiles with multi-layer sealing grooves more efficient and smooth.

[0025] Preferably, the guide plate has a flip-type structure; the lower end of the guide plate is hinged to one end of the mounting strip; the mounting strip is fixedly connected to the slider; and a limiting part is provided at one end of the mounting strip.

[0026] By rotating the guide plate 90°, the groove of the guide plate is made to face vertically upward, which makes it easier to put the filling structure into the guide groove on the guide plate, thereby improving the convenience of use and the processing efficiency of cold bending of door and window profiles.

[0027] A cold bending forming method for multi-layer sealing groove aluminum alloy door and window profiles, the method comprising the following steps: Step 1: Preparation. First, inspect all components of the cold bending forming die, including the punch, die, movable die, synchronization mechanism, elastic lifting structure, telescopic mechanism, and insertion mechanism, ensuring that each component is undamaged and functioning properly. Simultaneously, prepare the required multi-layered elastic metal sheet filling structure, apply lubricant between the metal sheets, and check the magnetic properties of the filling structure to ensure its good performance. Furthermore, confirm that the pressure and stroke parameters of the press are accurately set according to design requirements, and that the operators are familiar with the entire process flow and operating procedures.

[0028] Step 2: Place the profile. Place the aluminum alloy door and window profile to be processed on the movable die. At this time, the elastic lifting structure will lift the profile from one side, causing it to tilt. This ensures that when the punch presses down, the step surface on the punch will not collide with the step on the profile, improving the safety of equipment operation.

[0029] Step 3: Control the telescopic mechanism to push forward, and squeeze the profile from the side of the door and window profile, so that the step on the profile fits the step surface of the punch and the step surface of the movable die. Then the controller controls the press to squeeze the door and window profile until the elastic lifting structure is compressed into the blind hole of the movable die and the pressing stops. Step 3: Insertion of the infill structure. Activate the insertion mechanism, place the infill structure in the guide groove of the guide plate, and the linear drive unit moves the push plate to smoothly push the infill structure into the sealing groove of the door and window profile. The positioning groove and guide groove ensure the accuracy of the infill structure insertion position.

[0030] Step 4: Cold Bending Forming Operation. The controller then directs the press to continue downwards, with the die pressing down on the window and door profiles. As the press continues to press down, the window and door profiles are cold-bent. During this process, the movable die rotates synchronously with the pressing action of the punch via a synchronization mechanism, ensuring uniform force on both sides of the profile. The filling structure also bends and deforms with the cold bending of the profile, ensuring the shape stability of the sealing groove during the forming process.

[0031] Step 5: Post-forming processing. After the cold bending operation is completed, the press drives the upper template to rise, and the punch leaves the profile. At this time, the insertion mechanism is activated in reverse, the push plate moves in the opposite direction, and the pull rope drives the guide plate to retract. Due to the elasticity of the filling structure itself and the friction between the filling structure and the inner wall of the sealing groove, the filling structure will remain in the sealing groove. The operator can then remove it from the sealing groove of the formed door and window profile for the next cold bending forming operation.

[0032] The beneficial effects of this invention are as follows: 1. In this invention, the press drives the upper template to move downwards, and the punch descends accordingly, performing a cold bending forming operation on the door and window profile placed on the die support and supported by the movable die. During this process, the movable die will rotate and adjust accordingly according to the downward pressing action of the punch to better match the bending deformation of the profile. Since the filling structure is composed of multiple layers of elastic metal steel sheets, the multiple layers of elastic metal steel sheets ensure that it can be bent arbitrarily while ensuring that the thickness is not compressed, thus making it easy to bend and having good support. Therefore, during the cold bending of the profile, it can adapt to the shape change of the sealing groove and ensure the shape stability of the sealing groove during the forming process, thereby preventing the profile from cracking or excessively deforming due to uneven local stress. 2. This invention, by applying lubricating oil between the metal sheets of the filling structure, significantly reduces the friction between the sheets. This minimizes wear caused by friction during the bending deformation of the filling structure as the profile is cold-bent, further extending the service life of the filling structure and ensuring it maintains good performance throughout long-term cold-bending operations. Furthermore, the reduced friction makes the filling structure easier to bend, thus reducing the difficulty of cold-bending the profile. On the other hand, reduced friction facilitates smoother movement of the filling structure within the sealing groove, making it more convenient to insert into and remove from the sealing groove after cold bending, thereby improving overall production efficiency. In addition, lubricating oil is applied between the metal steel sheets of the filling structure, so that the metal steel sheets are pressed together by atmospheric pressure, thereby giving the filling structure a certain strength along the length direction, which makes it easier to insert the filling structure into the sealing groove of the door and window profile. 3. This invention, by setting an elastic lifting structure on the high step surface of the movable die, allows the door and window profiles to be tilted when placed on the movable die, as the elastic lifting structure lifts the profiles from one side. When the upper die moves the punch downwards, the tilted profiles ensure that the step surface on the punch will not collide with the step on the profiles, thus improving the safety of the equipment operation. When the step surface on the die enters the step on the profile and before the profile is pressed, the controller controls the telescopic mechanism to push forward, thereby pressing the profile laterally from the side. This causes the step on the profile to fit against the step surface of the punch and the step surface of the movable die. Then, the controller controls the press to continue moving downwards, and the die presses the profile downwards. During this process, the profile presses the elastic lifting structure downwards. When the profile is pressed between the punch and the movable die, the controller controls the telescopic mechanism to retract. As the press continues to press down, the profile is cold-bent. The combination of the elastic lifting structure and the telescopic mechanism ensures that the punch will not collide with the door and window profiles when it is pressed down, thus ensuring safety; it also ensures that the door and window profiles are in close contact with the punch and the movable die when the punch is pressed down, thus ensuring processing accuracy. 4. In this invention, the filling structure is placed in the guide groove of the guide plate. The linear drive is activated, and the motor drives the lead screw to rotate, causing the push plate to move along the linear guide rail. During the push plate's movement, the filling structure is smoothly pushed into the sealing groove of the door and window profile. The positioning groove and guide groove ensure the accuracy of the filling structure's position during the pushing process, preventing it from shifting and ensuring that the filling structure can be precisely inserted into the sealing groove. After the profile is cold-bent, the linear drive is activated in reverse, the push plate moves in the opposite direction, and the pull rope drives the guide plate back. At this time, the filling structure, due to its own elasticity and the friction between the inner wall of the sealing groove, will remain in the sealing groove, to be removed in subsequent operations. The use of the insertion mechanism automates the filling structure insertion process, greatly improving insertion efficiency and accuracy compared to manual insertion, and reducing errors that may be caused by manual operation. At the same time, it also reduces the labor intensity of operators, making the entire process of cold-bending aluminum alloy door and window profiles with multi-layer sealing grooves more efficient and smooth. Attached Figure Description

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of the overall structure of the cold bending forming mold of the present invention in the state of interpenetration and filling structure; Figure 2 This is a schematic diagram of the overall structure of the cold bending forming mold of the present invention in the state without the interpenetrating filling structure; Figure 3 This is a schematic diagram of the synchronization mechanism in this invention; Figure 4 This is a schematic diagram of the telescopic mechanism in this invention; Figure 5 This is a schematic diagram of the cold bending forming mold of the present invention in the state without door and window profiles placed on it; Figure 6 This is a schematic diagram of the elastic lifting structure in this invention; Figure 7 This is a schematic diagram of the interlocking mechanism in this invention; Figure 8 This is a schematic diagram of the interpenetration mechanism in the present invention in the interpenetration state; Figure 9 This is a schematic diagram of the interpenetration mechanism in the present invention in the state of placing the filling structure; In the diagram: 1. Punch; 2. Upper template; 3. Movable die; 3. Elastic lifting structure; 31. Second spring; 311. Sliding column; 312. Die support; 4. Lower template; 5. Filling structure; 6. Synchronization mechanism; 7. First gear; 71. Second gear; 72. Third gear; 73. Transmission rod; 74. Rack structure; 741. Limiting plate; 75. First spring; 76. Fourth gear; 77. Fifth gear; 78. Telescopic mechanism; 8. Support plate; 81. Cylinder; 82. Guide column; 83. Top plate; 84. Insertion mechanism; 9. Support frame; 91. Fixing plate; 92. Linear drive component; 93. Push plate; 94. Positioning groove; 941. Slider; 95. Guide plate; 96. Guide groove; 961. Pull rope; 97. Mounting strip; 98. Limiting part; 981. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figures 1 to 2 As shown, the cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles includes a punch 1, an upper template 2, a movable die 3, a die support 4, a lower template 5, and a filling structure 6 inserted into the door and window profile. The upper template 2 is installed on the movable end of the press. The upper end of the punch 1 is fixedly connected to the upper template 2. The lower template 5 is installed on the worktable of the press. The die support 4 is symmetrically arranged on the lower template 5. The lower end of the die support 4 is fixedly connected to the lower template 5. The upper end of the die support 4 is hinged to the movable die 3. The filling structure 6 is composed of multiple layers of elastic metal steel sheets. The filling structure 6 fills the multi-layer sealing groove on the door and window profile.

[0037] During operation, the press drives the upper template 2 downwards, and the punch 1 descends accordingly, performing a cold bending forming operation on the door and window profile placed on the die support 4 and supported by the movable die 3. During this process, the movable die 3 rotates and adjusts accordingly to better match the bending deformation of the profile. Because the filling structure 6 is composed of multiple layers of elastic metal steel sheets, this multi-layered structure ensures both flexibility and prevents compression of thickness, resulting in easy bending and excellent support. Therefore, during cold bending of the profile, it can adapt to changes in the shape of the sealing groove and ensure the shape stability of the sealing groove during the forming process, thus preventing cracking or excessive deformation of the profile due to uneven local stress. After the cold bending operation is completed, the press drives the upper template 2 upwards, and the punch 1 leaves the profile. At this point, the filling structure 6 can be removed from the formed door and window profile sealing groove for the next cold bending forming operation. Due to the elasticity of the metal steel sheets, the filling structure 6 maintains good performance even after multiple uses, reducing production costs. Throughout the cold bending forming process, operators must strictly control the pressure and stroke of the press to ensure that each formed profile meets the design requirements for precision and quality standards, thereby achieving efficient and stable production of multi-layer sealing groove aluminum alloy door and window profiles.

[0038] Lubricating oil is applied between the metal steel sheets of the filling structure 6.

[0039] By applying lubricating oil between the metal sheets of the filling structure 6, on the one hand, it can greatly reduce the friction between the metal sheets. When the filling structure 6 bends and deforms during cold bending of the profile, it reduces the wear caused by friction between the steel sheets, further extending the service life of the filling structure 6. This allows the filling structure 6 to maintain good performance during long-term cold bending operations. Moreover, the reduced friction between the metal sheets also makes the filling structure 6 easier to bend, thereby reducing the difficulty of cold bending the profile. On the other hand, reducing friction helps the filling structure 6 move more smoothly in the sealing groove. Whether it is filling into the sealing groove or removing it from the sealing groove after the cold bending operation, it is more convenient, which helps to improve the overall production efficiency.

[0040] In addition, lubricating oil is applied between the metal steel sheets of the filling structure 6, so that the metal steel sheets are pressed together by atmospheric pressure, thereby giving the filling structure 6 a certain strength along the length direction, which makes it easier to insert the filling structure 6 into the sealing groove of the door and window profile.

[0041] The metal steel sheet of the filling structure 6 is made of magnetic 410 stainless steel. The magnetism further increases the adhesion between the metal steel sheets, further increases the strength of the filling structure 6 along the length direction, and further facilitates the insertion of the filling structure 6 into the sealing groove of the door and window profile.

[0042] like Figure 3 and Figure 5 As shown, the two movable dies 3 are connected by a synchronization mechanism 7; the synchronization mechanism 7 is used to make the two movable dies 3 rotate synchronously.

[0043] During operation, if the two movable dies 3 do not rotate synchronously when the punch 1 presses down for cold bending, the force on both sides of the profile will be uneven, affecting the bending accuracy and quality. This can result in over-bending on one side and under-bending on the other, and in severe cases, even scrapping the profile. The synchronization mechanism 7 effectively avoids this problem. The synchronization mechanism 7 can use chain drive or gear drive to connect the two movable dies 3, ensuring they rotate synchronously during the pressing of the punch 1. This results in uniform force on both sides of the profile, guaranteeing good symmetry and accuracy in the cold-bent profile. In long-term production, the synchronization mechanism 7 needs regular inspection and maintenance, such as checking the chain tension and gear wear, and adjusting or replacing relevant components as needed to ensure it is always in good working condition. This ensures the smooth cold bending of multi-layer sealing groove aluminum alloy door and window profiles, further improving production efficiency and product quality, and meeting market demand for high-quality aluminum alloy door and window profiles.

[0044] like Figure 3 and Figure 5 As shown, the synchronization mechanism 7 includes a first gear 71, a second gear 72, a third gear 73, a transmission rod 74, a limiting plate 75, a first spring 76, a fourth gear 77, and a fifth gear 78; the first gear 71 is fixedly connected to the hinge shaft end of one of the movable die 3; the second gear 72, the third gear 73, and the rack structure 741 at one end of the transmission rod 74 are sequentially engaged below the first gear 71; the transmission rod 74 is restricted from sliding along the length direction of the lower template 5 by the limiting plate 75; the limiting plate 75 is fixedly connected to the lower template 5; the fifth gear 78 and the fourth gear 77 are sequentially engaged above the rack structure 741 at the other end of the transmission rod 74; the fourth gear 77 is fixedly connected to the hinge shaft end of the other movable die 3; a first spring 76 is provided between the other end of the transmission rod 74 and the die support 4; the first spring 76 is in a compressed state.

[0045] During operation, when the punch 1 is pressed down, one of the movable dies 3 begins to rotate. The first gear 71, which is fixedly connected to the hinge shaft end of the movable die 3, rotates accordingly. The first gear 71 drives the second gear 72, which meshes with it, to rotate. The second gear 72 then drives the third gear 73 to rotate, thereby causing the rack structure 741 at one end of the transmission rod 74 to be stressed. Under the restriction of the limiting plate 75, the transmission rod 74 slides along the length direction of the lower template 5. During the sliding process of the transmission rod 74, the rack structure 741 at the other end pushes the fifth gear 78, which meshes with it, to rotate. The fifth gear 78 then drives the fourth gear 77 to rotate. Since the fourth gear 77 is fixedly connected to the hinge shaft end of another movable die 3, the synchronous rotation of the two movable dies 3 is achieved.

[0046] During this process, the first spring 76 is under compression, and its function is to provide a reverse elastic force to the transmission rod 74. After the processed profile is removed, the reverse elastic force can be used to make the movable die 3 automatically return to the horizontal state, which makes it easier to place the profile on the movable die 3 again, thus improving convenience.

[0047] like Figures 4 to 6 As shown, an elastic lifting structure 31 is provided on the high step surface of the movable die 3; the lifting force of the elastic lifting structure 31 is greater than the weight of the door and window profile; a telescopic mechanism 8 is provided on one side of the movable die 3; the telescopic mechanism 8 is used to push the door and window profile to fit against the step surface of the punch 1 and the step surface of the movable die 3.

[0048] During operation, an elastic lifting structure 31 is installed on the high step surface of the movable die 3. When the door and window profile is placed on the movable die 3, the elastic lifting structure 31 lifts the door and window profile from one side, causing it to tilt. When the upper template 2 drives the punch 1 to descend, the tilted door and window profile ensures that the step surface on the punch 1 will not collide with the step on the door and window profile, thereby improving the safety of equipment operation. When the step surface on the die enters the step on the door and window profile and before the door and window profile is extruded, the controller controls the movement. The telescopic mechanism 8 pushes forward, thereby laterally pressing the door and window profile from the side. This causes the step on the door and window profile to fit against the step surface of the punch 1 and the step surface of the movable die 3. The controller then controls the press to continue moving downwards, causing the die to press the door and window profile downwards. During this process, the door and window profile presses the elastic lifting structure 31 downwards. When the door and window profile is pressed between the punch 1 and the movable die 3, the controller controls the telescopic mechanism 8 to retract. As the press continues to press down, the door and window profile is cold-bent. The cooperation between the elastic lifting structure 31 and the telescopic mechanism 8 ensures that the punch 1 does not collide with the door and window profile during pressing, thus ensuring safety; it also ensures that the door and window profile is tightly fitted with the punch 1 and the movable die 3 during pressing, thus ensuring processing accuracy.

[0049] like Figures 4 to 6 As shown, the elastic lifting structure 31 includes a second spring 311 and a sliding column 312; the sliding column 312 is slidably connected to a blind hole on the movable die 3; the second spring 311 is arranged below the sliding column 312; the telescopic mechanism 8 includes a support plate 81, a cylinder 82, a guide column 83, and a top plate 84; the lower end of the support plate 81 is fixedly connected to the lower template 5; the top plate 84 is arranged on the upper end of the support plate 81 near the movable die 3; the top plate 84 is slidably connected to the support plate 81 through two guide columns 83; the middle part of the top plate 84 is fixedly connected to the end of the cylinder rod of the cylinder 82; the cylinder 82 is fixedly connected to the support plate 81.

[0050] During operation, when the window / door profile is placed on the movable die 3, the second spring 311 is compressed, providing an upward elastic force to the sliding column 312, thereby lifting the window / door profile and causing it to tilt. When the punch 1 is pressed down to a certain position, the cylinder 82 is activated, and the cylinder rod pushes the top plate 84 along the guide column 83 towards the window / door profile. The top plate 84 contacts and presses the window / door profile, causing its step to fit against the step surfaces of the punch 1 and the movable die 3. When the window / door profile is pressed between the punch 1 and the movable die 3, the cylinder rod of the cylinder 82 retracts, causing the top plate 84 to return to its original position. During this process, the guide column 83 acts as a guide, ensuring the stability of the movement of the top plate 84 and guaranteeing accurate pressing action.

[0051] In actual production, the performance of the elastic lifting structure 31 and the telescopic mechanism 8 needs to be checked regularly. For the elastic lifting structure 31, it is necessary to check whether the elasticity of the second spring 311 has weakened. If the spring elasticity is insufficient, it may lead to insufficient lifting height of the door and window profile, thereby affecting the safety and fitting accuracy when the punch 1 is pressed down. For the telescopic mechanism 8, it is necessary to check the sealing of the cylinder 82 and the wear of the guide post 83. If the cylinder 82 is not properly sealed, it may lead to insufficient air pressure, affecting the pressing force of the top plate 84. Through regular inspection and maintenance, it is ensured that the elastic lifting structure 31 and the telescopic mechanism 8 are always in good working condition, further guaranteeing the quality and efficiency of cold bending forming of multi-layer sealing groove aluminum alloy door and window profiles.

[0052] like Figures 7 to 9As shown, the cold bending forming mold also includes an insertion mechanism 9; the insertion mechanism 9 includes a support frame 91, a fixed plate 92, a linear drive component 93, a push plate 94, a slider 95, a guide plate 96, and a pull rope 97; the upper end of the support frame 91 is fixedly connected to the fixed plate 92; the fixed plate 92 is provided with the linear drive component 93 along its length direction; the linear drive component 93 is a linear motion component driven by a lead screw and a motor; the linear drive component 93 is used to drive the push plate 94 to move; the push plate 94 is provided with a positioning groove 941 corresponding to the sealing groove of the door and window profile; multiple sliders 95 are slidably connected to the linear guide rail of the linear drive component 93; the slider 95 is provided with a guide plate 96; the guide plate 96 is provided with a guide groove 961 corresponding to the sealing groove of the door and window profile; the pull rope 97 is sequentially fixedly connected to all the guide plates 96; one end of the pull rope 97 is fixedly connected to the push plate 94; the other end of the pull rope 97 is fixedly connected to one end of the fixed plate 92.

[0053] During operation, the filling structure 6 is placed in the guide groove 961 of the guide plate 96, and the linear drive 93 is activated. The motor drives the lead screw to rotate, causing the push plate 94 to move along the linear guide rail. During the movement of the push plate 94, the filling structure 6 is smoothly pushed into the sealing groove of the door and window profile. The positioning groove 941 and the guide groove 961 ensure the accuracy of the position of the filling structure 6 during the pushing process, prevent it from shifting, and ensure that the filling structure 6 can be accurately inserted into the sealing groove.

[0054] After the profile is cold-bent, the linear drive component 93 is activated in the reverse direction, the push plate 94 moves in the reverse direction, and the pull rope 97 drives the guide plate 96 to retract. At this time, the filling structure 6 will remain in the sealing groove due to its own elasticity and friction with the inner wall of the sealing groove, and will be removed in subsequent operations. The use of the insertion mechanism 9 automates the insertion process of the filling structure 6, greatly improving insertion efficiency and accuracy compared to manual insertion, and reducing errors that may be caused by manual operation. At the same time, it also reduces the labor intensity of operators, making the entire process of cold bending forming of multi-layer sealing groove aluminum alloy door and window profiles more efficient and smooth.

[0055] like Figures 8 to 9 As shown, the guide plate 96 has a flip-type structure; the lower end of the guide plate 96 is hinged to one end of the mounting strip 98; the mounting strip 98 is fixedly connected to the slider 95; a limiting part 981 is provided at one end of the mounting strip 98.

[0056] By rotating the guide plate 96 by 90°, the groove of the guide groove 961 on the guide plate 96 is made to face vertically upward, which makes it easier to put the filling structure 6 into the guide groove 961 on the guide plate 96, thereby improving the convenience of use and the processing efficiency of cold bending of door and window profiles.

[0057] like Figures 1 to 9 As shown, a cold bending forming method for multi-layer sealing groove aluminum alloy door and window profiles includes the following steps: Step 1: Preparation. First, inspect all components of the cold bending forming die, including the punch 1, die cavity, movable die cavity 3, synchronizing mechanism 7, elastic lifting structure 31, telescopic mechanism 8, and insertion mechanism 9, ensuring that each component is undamaged and functioning properly. Simultaneously, prepare the required multi-layered elastic metal sheet filling structure 6, apply lubricating oil between the metal sheets, and check that the magnetic properties of the filling structure 6 meet the requirements to ensure its good performance. Furthermore, confirm that the pressure and stroke parameters of the press are accurately set according to design requirements, and that the operators are familiar with the entire process flow and operating procedures.

[0058] Step 2: Place the profile. Place the aluminum alloy door and window profile to be processed on the movable die 3. At this time, the elastic lifting structure 31 will lift the profile from one side, causing it to tilt, so that when the punch 1 presses down, the step surface on the punch 1 will not collide with the step on the profile, thus improving the safety of equipment operation.

[0059] Step 3: Control the telescopic mechanism 8 to push forward through the controller, and squeeze the profile from the side of the door and window profile to the side, so that the step on the profile fits the step surface of the punch 1 and the step surface of the movable die 3. Then the controller controls the press to squeeze the door and window profile until the elastic lifting structure 31 is compressed into the blind hole of the movable die 3 and the pressing stops. Step 3: Insertion of Filler Structure 6. Activate the insertion mechanism 9 to place the filler structure 6 in the guide groove 961 of the guide plate 96. The linear drive component 93 drives the push plate 94 to move, smoothly pushing the filler structure 6 into the sealing groove of the door and window profile. The positioning groove 941 and the guide groove 961 ensure the accuracy of the insertion position of the filler structure 6.

[0060] Step 4: Cold Bending Forming Operation. The controller then controls the press to continue moving downwards, with the die pressing down on the window and door profiles. As the press continues to press down, the window and door profiles are cold-bent. During this process, the movable die 3 rotates synchronously with the pressing action of the punch 1 via the synchronization mechanism 7, ensuring uniform force on both sides of the profile. The filling structure 6 also bends and deforms as the profile is cold-bent, ensuring the shape stability of the sealing groove during the forming process.

[0061] Step 5: Post-forming processing. After the cold bending operation is completed, the press drives the upper template 2 to rise, and the punch 1 leaves the profile. At this time, the reverse insertion mechanism 9 is activated, the push plate 94 moves in the reverse direction, and the pull rope 97 drives the guide plate 96 to retract. Due to the elasticity of the filling structure 6 itself and the friction between the filling structure 6 and the inner wall of the sealing groove, the filling structure 6 will remain in the sealing groove. The operator can remove it from the sealing groove of the formed door and window profile for the next cold bending forming operation.

[0062] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles, characterized in that: The system includes a punch (1), an upper template (2), a movable die (3), a die support (4), a lower template (5), and a filling structure (6) inserted into the door and window profile. The upper template (2) is installed on the movable end of the press. The upper end of the punch (1) is fixedly connected to the upper template (2). The lower template (5) is installed on the worktable of the press. The die support (4) is symmetrically arranged on the lower template (5). The lower end of the die support (4) is fixedly connected to the lower template (5). The upper end of the die support (4) is hinged to the movable die (3). The filling structure (6) is made of multiple layers of elastic metal steel sheets. The filling structure (6) fills the sealing groove of the multi-layer structure on the door and window profile. An elastic lifting structure (31) is provided on the high step surface of the movable die (3); the lifting force of the elastic lifting structure (31) is greater than the weight of the door and window profiles; A telescopic mechanism (8) is provided on one side of the movable die (3); the telescopic mechanism (8) is used to push the door and window profiles to fit against the step surface of the punch (1) and the step surface of the movable die (3).

2. The cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles according to claim 1, characterized in that: Lubricating oil is applied between the metal steel sheets of the filling structure (6).

3. The cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles according to claim 2, characterized in that: The metal sheet of the filling structure (6) is made of magnetic 410 stainless steel.

4. The cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles according to claim 1, characterized in that: The two movable dies (3) are connected by a synchronization mechanism (7); the synchronization mechanism (7) is used to make the two movable dies (3) rotate synchronously.

5. The cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles according to claim 4, characterized in that: The synchronization mechanism (7) includes a first gear (71), a second gear (72), a third gear (73), a transmission rod (74), a limiting plate (75), a first spring (76), a fourth gear (77), and a fifth gear (78); the first gear (71) is fixedly connected to the hinge shaft end of one of the movable die (3); the second gear (72), the third gear (73), and the rack structure (741) at one end of the transmission rod (74) are sequentially engaged below the first gear (71); the transmission rod (74) is restricted from sliding along the length direction of the lower template (5) by the limiting plate (75); The limiting plate (75) is fixedly connected to the lower template (5); the fifth gear (78) and the fourth gear (77) are sequentially meshed above the rack structure (741) at the other end of the transmission rod (74); the fourth gear (77) is fixedly connected to the hinge shaft end of another movable die (3); a first spring (76) is provided between the other end of the transmission rod (74) and the die support (4); the first spring (76) is in a compressed state.

6. The cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles according to claim 1, characterized in that: The elastic lifting structure (31) includes a second spring (311) and a sliding column (312); the sliding column (312) is slidably connected in a blind hole on the movable die (3); the second spring (311) is provided below the sliding column (312); the telescopic mechanism (8) includes a support plate (81), a cylinder (82), a guide column (83) and a top plate (84); the lower end of the support plate (81) is fixedly connected to the lower template (5); the top plate (84) is provided on the upper end of the support plate (81) near the movable die (3); the top plate (84) is slidably connected to the support plate (81) through two guide columns (83); the middle part of the top plate (84) is fixedly connected to the end of the cylinder rod of the cylinder (82); the cylinder (82) is fixedly connected to the support plate (81).

7. The cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles according to claim 1, characterized in that: It also includes an insertion mechanism (9); the insertion mechanism (9) includes a support frame (91), a fixed plate (92), a linear drive (93), a push plate (94), a slider (95), a guide plate (96), and a pull rope (97); the upper end of the support frame (91) is fixedly connected to the fixed plate (92); the fixed plate (92) is provided with a linear drive (93) along its length; the linear drive (93) is a linear motion component driven by a lead screw and a motor; the linear drive (93) is used to drive the push plate (94) to move; the push plate (94) The upper part is provided with a positioning groove (941) corresponding to the sealing groove of the door and window profile; multiple sliders (95) are slidably connected on the linear guide rail of the linear drive component (93); a guide plate (96) is provided on the slider (95); a guide groove (961) corresponding to the sealing groove of the door and window profile is provided on the guide plate (96); the pull rope (97) is fixedly connected to all the guide plates (96) in sequence; one end of the pull rope (97) is fixedly connected to the push plate (94); the other end of the pull rope (97) is fixedly connected to one end of the fixing plate (92).

8. The cold bending forming mold for multi-layer sealing groove aluminum alloy door and window profiles according to claim 7, characterized in that: The guide plate (96) has a flip-type structure; the lower end of the guide plate (96) is hinged to one end of the mounting strip (98); the mounting strip (98) is fixedly connected to the slider (95); a limiting part (981) is provided at one end of the mounting strip (98).

9. A cold bending forming method for multi-layer sealing groove aluminum alloy door and window profiles, applicable to the cold bending forming mold of any one of claims 1-8, characterized in that: The method includes the following steps: Step 1: Prepare the required multi-layered elastic metal steel sheet filling structure (6) and apply lubricating oil between the metal steel sheets; in addition, confirm that the pressure and stroke parameters of the press have been set accurately according to the design requirements; Step 2: Place the aluminum alloy door and window profile to be processed on the movable die (3). At this time, the elastic lifting structure (31) will lift the profile from one side, causing it to tilt. Step 3: Control the telescopic mechanism (8) to push forward through the controller, and squeeze the profile from the side of the door and window profile to the side, so that the step on the profile fits the step surface of the punch (1) and the step surface of the movable die (3). Then the controller controls the press to squeeze the door and window profile until the elastic lifting structure (31) is compressed into the blind hole of the movable die (3) and the pressing stops. Step 3: Place the filling structure (6) in the guide groove (961) of the guide plate (96), and the linear drive (93) drives the push plate (94) to move, so as to smoothly push the filling structure (6) into the sealing groove of the door and window profile; Step 4: The controller then controls the press to continue moving downwards, and the die extrudes the door and window profiles downwards. As the press continues to press down, the door and window profiles are cold-bent and formed. Step 5: After the cold bending operation is completed, the press drives the upper template (2) to rise and the punch (1) to leave the profile. At this time, the insertion mechanism (9) is started in reverse, the push plate (94) moves in reverse, and the pull rope (97) drives the guide plate (96) to retract. Due to the elasticity of the filling structure (6) and the friction between the inner wall of the sealing groove, the filling structure (6) will remain in the sealing groove. The operator can remove it from the sealing groove of the formed door and window profile so that the next cold bending forming operation can be carried out.

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