Cold roll forming die and forming method for aluminum alloy door and window profile with multiple layers of sealing grooves

Abstract

The invention belongs to the technical field of aluminum profile bending forming dies, and particularly relates to a cold roll forming die and forming method for a multi-layer sealing groove aluminum alloy door and window profile, and the cold roll forming die comprises a male die, an upper die plate, a movable female die, a female die bracket, a lower die plate and a filling structure inserted into the door and window profile; in the cold roll forming process, the movable female die can be correspondingly rotated and adjusted according to the downward pressing action of the male die so as to be better matched with bending deformation of a sectional material; the filling structure is formed by stacking the multiple layers of elastic metal steel sheets, and the multiple layers of elastic metal steel sheets are stacked, so that the filling structure can be bent at will and can be prevented from being compressed in the thickness direction, and therefore the filling structure is easy to bend and has good supporting performance, and the filling structure can adapt to the shape change of a sealing groove during cold bending of the sectional material; and the shape stability of the sealing groove in the forming process can be guaranteed, and then the situation that the sectional material is broken or excessively deformed due to uneven local stress is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum profile bending forming dies, in particular to a cold bending forming die and a forming method for a multi-layer sealed groove aluminum alloy door and window profile. Background Art

[0002] The traditional cold-bending process for aluminum alloy door and window profiles presents several pressing challenges. For example, conventional molds are poorly suited for forming multi-layer sealing groove profiles, making it difficult to achieve ideal sealing groove precision, thus impacting the overall sealing performance of the doors and windows. During the cold-bending process, some conventional molds create significant friction between the profile and the mold, increasing the risk of surface scratches and potentially causing uneven deformation, reducing product yield.

[0003] Furthermore, early roll-forming methods largely relied on manual experience to control pressure and stroke, lacking precise parametric control. This resulted in low production efficiency and poor quality consistency across batches. Furthermore, previous infill structures either struggled to adapt to the complex shape of the sealing grooves during profile bending or failed to provide adequate support, leading to profile defects such as cracking or excessive deformation, severely impacting the quality and service life of windows and doors.

[0004] To address these industry pain points, the present invention proposes a cold-bend forming die and forming method for multi-layer sealed groove aluminum alloy door and window profiles, which are both innovative and practical. Its unique movable die design and filling structure consisting of multiple layers of elastic metal steel sheets effectively address the problems of insufficient sealing groove forming precision and easy deformation of profiles in traditional processes. This represents a new breakthrough in the cold-bend forming process for aluminum alloy door and window profiles and is expected to promote the upgrading and development of related technologies within the industry. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention proposes a cold-formed die and forming method for aluminum alloy door and window profiles with multi-layer sealing grooves. This invention primarily addresses the problem that the filling structure in existing cold-formed dies for aluminum alloy door and window profiles either fails to adapt to the complex shape changes of the sealing groove or fails to provide sufficient support when the profile is bent, resulting in defects such as cracking or excessive deformation of the profile, which seriously affects the quality and service life of the doors and windows.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the present 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 bracket, a lower template and a filling structure inserted in the door and window profile; the upper template is installed on the movable end of the press; the upper end of the punch is fixedly connected to the upper template; the lower template is installed on the workbench of the press; the die bracket is symmetrically arranged on the left and right of the lower template; the lower end of the die bracket is fixedly connected to the lower template; the upper end of the die bracket is hinged to the movable die; the filling structure is composed of multiple layers of elastic metal steel sheets stacked together; the filling structure fills the sealing groove of the multi-layer structure on the door and window profile.

[0007] During operation, the press drives the upper platen downward, lowering the punch. This action forms the door and window profile, which is supported by the movable die on the die support. During this process, the movable die rotates and adjusts according to the downward pressure of the punch to better accommodate the bending deformation of the profile. Because the filler structure is composed of multiple layers of elastic metal steel sheets, which ensure both flexible bending and thickness resistance, it offers excellent support and flexibility. During cold bending, it adapts to the changing shape of the sealing groove while maintaining its shape stability during the forming process, preventing cracking or excessive deformation of the profile due to uneven localized force. Once the cold bending process is complete, the press drives the upper platen upward, releasing the punch from the profile. The filler structure can now be removed from the sealing groove of the formed door and window profile for the next cold bending operation. Thanks to the elasticity of the metal steel sheets, the filler structure maintains its performance after repeated use, reducing production costs. Throughout the entire roll-forming process, operators must strictly control the pressure and stroke of the press to ensure that each formed profile meets the design accuracy and quality standards, enabling efficient and stable production of multi-layer sealed 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 steel sheets of the filling structure, on the one hand, it can greatly reduce the friction between the metal steel sheets. When the filling structure is bent and deformed as the profile is cold-bent, the wear between the steel sheets due to friction is reduced, and the service life of the filling structure is further extended, so that the filling structure can always maintain a good performance state during long-term cold-bending operations; and the reduced friction between the metal steel sheets also 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 taking it out of the sealing groove after the cold-bending operation is completed, it can be 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 adhered to each other under atmospheric pressure, thereby giving the filling structure a certain strength along the length direction, making it easier to insert the filling structure into the sealing groove of the door and window profile.

[0011] Preferably, the metal steel sheets of the filling structure are 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 along the length direction, 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 via a synchronization mechanism; the synchronization mechanism is used to enable the two movable dies to rotate synchronously.

[0013] During operation, when the punch is pressed down to perform the cold bend forming operation, if the two movable dies do not rotate synchronously, the force on both sides of the profile will be uneven, thus affecting the bending accuracy and quality of the profile. One side may bend excessively and the other side may bend insufficiently. In severe cases, the profile may even be scrapped. The setting of the synchronization mechanism effectively avoids this problem. The synchronization mechanism can adopt a chain drive or gear drive, connecting the two movable dies through a chain or gear to ensure that they can rotate synchronously during the punch pressing process, so that the force on both sides of the profile is evenly distributed, ensuring that the cold-formed profile has good symmetry and precision. During the long-term production process, the synchronization mechanism needs to be regularly inspected and maintained, such as checking the tightness of the chain and the wear of the gears, and timely adjusting or replacing related components to ensure that the synchronization mechanism is always in good working condition, thereby ensuring the smooth cold bend forming operation of the multi-layer sealed groove aluminum alloy door and window profile, further improving production efficiency and product quality, and meeting the 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 limit plate, a first spring, a fourth gear and a fifth gear; the hinged shaft end of one of the movable dies is fixedly connected to the first gear; the second gear, the third gear and the rack structure at one end of the transmission rod are engaged in sequence below the first gear; the transmission rod is restricted from sliding along the length direction of the lower template by the limit plate; the limit plate is fixedly connected to the lower template; the fifth gear and the fourth gear are engaged in sequence above the rack structure at the other end of the transmission rod; the fourth gear is fixedly connected to the hinged shaft end of another movable die; a first spring is arranged between the other end of the transmission rod and the die bracket; the first spring is in a compressed state.

[0015] During operation, when the punch is pressed down, one of the movable dies starts to rotate, and the first gear fixedly connected to the end of the hinged shaft 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, thereby causing the rack structure at one end of the transmission rod to be subjected to force. The transmission rod slides along the length direction of the lower template under the restriction of the limit plate. During the sliding process of the transmission rod, the rack structure at the other end will push the fifth gear meshing with it to rotate, and the fifth gear will drive the fourth gear to rotate. Since the fourth gear is fixedly connected to the end of the hinged shaft of the other movable die, the synchronous rotation of the two movable dies is achieved.

[0016] During this process, the first spring is in a compressed state, and its function is to provide a reverse elastic force for the transmission rod. After the processed profile is removed, the reverse elastic force can be used to automatically restore the movable die to a horizontal state, making it easier to place the profile on the movable die, thereby 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 gravity 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 toward the step surface of the punch and the step surface of the movable die.

[0018] During operation, an elastic lifting structure is provided on the high step surface of the movable die, and then when the door and window profile is placed on the movable die, the door and window profile is lifted from one side by the elastic lifting structure and tilted. When the upper template drives the punch to descend, the tilted door and window profile can ensure that the step surface on the punch 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 telescopic mechanism to push forward, and then extrudes the door and window profile laterally from the side of the door and window profile, so that the step on the door and window profile fits with the step surface of the punch and the step surface of the movable die, and then the controller controls the press to continue to move downward, and then the die extrudes the door and window profile downward. During the process, the door and window profile squeezes the elastic lifting structure downward, and when the door and window profile is squeezed between the punch and the movable die, the controller controls the telescopic mechanism to retract, and as the press continues to press downward, the door and window profile is cold-bent. Through the cooperation of the elastic lifting structure and the telescopic mechanism, it is ensured that the punch will not collide with the door and window profile when the punch is pressed down, thereby ensuring safety; it is also ensured that the door and window profile is tightly fitted with the punch and the movable die when the punch is pressed down, thereby ensuring processing accuracy.

[0019] Preferably, the elastic lifting structure includes a second spring and a sliding column; the sliding column is slidably connected to the blind hole on the movable die; the second spring is arranged 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 arranged on the upper end of the support plate close to the side of the movable die; the top plate is slidably connected to the support plate through two guide columns; the middle part of the top plate is fixedly connected to the cylinder rod end of the cylinder; the cylinder is fixedly connected to the support plate.

[0020] During operation, when the door and window profile is placed on the movable die, the second spring is compressed, exerting an upward force on the sliding column, thereby lifting the door and window profile and causing it to tilt. When the punch is pressed down to a certain position, the cylinder is activated, and the cylinder rod pushes the top plate along the guide column toward the door and window profile. The top plate contacts and squeezes the door and window profile, so that its step aligns with the step surface of the punch and movable die. When the door and window profile is squeezed between the punch and movable die, the cylinder rod retracts, driving the top plate to return to its original position. During this process, the guide column plays a guiding role, ensuring the stability of the top plate's movement and the accuracy of the squeezing action.

[0021] During actual production, the performance of the elastic jacking structure and telescopic mechanism requires regular inspection. For the elastic jacking structure, check whether the elasticity of the second spring has weakened. Insufficient spring elasticity may result in insufficient lift height for the door and window profile, affecting the safety and fit accuracy of the punch during downward pressure. For the telescopic mechanism, check the tightness of the cylinder and the wear of the guide posts. A poor cylinder seal may result in insufficient air pressure, affecting the extrusion force of the top plate. Regular inspection and maintenance ensure that the elastic jacking structure and telescopic mechanism are always in good working condition, further ensuring the quality and efficiency of the cold-formed multi-layer sealed groove aluminum alloy door and window profiles.

[0022] Preferably, the cold-bending forming mold also includes an insertion mechanism; the insertion mechanism includes a support frame, a fixed plate, a linear drive, 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; a linear drive is arranged on the fixed plate along the length direction; the linear drive is a linear motion component driven by a lead screw and a motor; the linear drive is used to drive the push plate to move; a positioning groove corresponding to the sealing groove of the door and window profile is arranged on the push plate; a plurality of sliders are slidably connected on the linear guide rail of the linear drive; a guide plate is arranged on the slider; a guide groove corresponding to the sealing groove of the door and window profile is arranged on the guide plate; the pull rope is fixedly connected to all guide plates in sequence; 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, the linear drive part is started, and the motor drives the lead screw to rotate, so that the push plate moves 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 setting of the positioning groove and the guide groove ensures the position accuracy of the filling structure during the pushing process, avoids its offset, and ensures that the filling structure can be accurately inserted into the sealing groove.

[0024] After the profile is roll-formed, the linear drive is activated in the opposite direction, causing the push plate to move in the opposite direction, and the pull cord drives the guide plate back. At this point, the filler structure, due to its elasticity and friction with the inner wall of the sealing groove, remains in the sealing groove, awaiting subsequent removal. The insertion mechanism automates the insertion process of the filler structure, significantly improving efficiency and accuracy compared to manual insertion and reducing potential errors introduced by manual operation. It also reduces operator workload, making the entire roll-forming process for multi-layer sealed groove aluminum alloy door and window profiles more efficient and streamlined.

[0025] Preferably, the guide plate is a flip structure; a corner at the lower end of the guide plate is hinged to one end of the mounting bar; the mounting bar is fixedly connected to the slider; and a limiting portion is provided at one end of the mounting bar.

[0026] By flipping the guide plate 90°, the notch of the guide groove on the guide plate is made vertically upward, making it easier to place the filling structure into the guide groove on the guide plate, thereby improving the convenience of use and the processing efficiency of cold-bending the door and window profiles.

[0027] A cold-bending method for a multi-layer sealed groove aluminum alloy door and window profile, the method comprising the following steps: Step 1: Preparation. First, inspect all components of the roll-forming die, including the punch, die, movable die, synchronization mechanism, elastic jacking structure, telescopic mechanism, and insertion mechanism, to ensure they are intact and functioning properly. Prepare the required filling structure consisting of multiple layers of elastic metal steel sheets and apply lubricant between the sheets. Check the magnetic properties of the filling structure to ensure proper performance. Furthermore, confirm that the press's pressure and stroke parameters are accurately set according to design requirements. Operators must be 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 so that when the punch presses down, the step surface on the punch will not collide with the step on the profile, thereby improving the safety of equipment operation.

[0029] Step 3: The controller controls the telescopic mechanism to push forward, squeezing the door and window profile sideways from the side, so that the step on the profile fits in with the step surface of the punch and the step surface of the movable die. The controller then 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 then stops pressing down. Step 3: Insert the filling structure. Activate the insertion mechanism and place the filling structure in the guide groove of the guide plate. The linear drive element drives the push plate to move, smoothly pushing the filling structure into the sealing groove of the door and window profile. The positioning groove and guide groove ensure the accuracy of the filling structure's insertion position.

[0030] Step 4: Roll-forming. The controller then controls the press to continue downward movement, and the die presses the door and window profile downward. As the press continues to press down, the roll-forming operation is completed. During this process, the movable die rotates synchronously with the downward movement of the punch through a synchronization mechanism, ensuring uniform force on both sides of the profile. The filling structure also bends and deforms as the profile bends, ensuring the shape stability of the sealing groove during the forming process.

[0031] Step 5: Post-forming Processing. Once the cold-bending operation is complete, the press drives the upper platen upward, and the punch leaves the profile. At this point, the insertion mechanism is activated in the reverse direction, the push plate moves in the opposite direction, and the pull rope drives the guide plate back. Due to the elasticity of the filler structure and the friction between the inner wall of the sealing groove, the filler structure remains in the sealing groove. The operator can remove it from the sealing groove of the formed door and window profile to prepare for the next cold-bending operation.

[0032] The beneficial effects of the present invention are as follows: 1. In the present invention, a press drives the upper mold plate downward, and the punch descends accordingly, performing a cold bend 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 rotates and adjusts accordingly according to the downward pressure of the punch to better accommodate the bending deformation of the profile. Because the filling structure is composed of multiple layers of elastic metal steel sheets, the stacking of these multiple layers of elastic metal steel sheets ensures that they can be bent arbitrarily while ensuring that their thickness is not compressed, making it easy to bend and have good support. Therefore, when the profile is cold-bent, it can adapt to the shape changes of the sealing groove and ensure the shape stability of the sealing groove during the forming process, thereby preventing the profile from cracking or excessive deformation due to local uneven force. 2. The present invention applies lubricating oil between the metal steel sheets of the filling structure. On the one hand, it can greatly reduce the friction between the metal steel sheets. When the filling structure is bent and deformed as the profile is cold-bent, the wear between the steel sheets due to friction is reduced, further extending the service life of the filling structure, so that the filling structure can always maintain a good performance state during the long-term cold-bending operation. In addition, the reduced friction between the metal steel sheets also makes the filling structure easier to bend, thereby reducing the difficulty of cold-bending the profile. On the other hand, the reduced friction helps the filling structure move more smoothly in the sealing groove, making it more convenient both when filling into the sealing groove and when removing from the sealing groove after the cold-bending operation is completed, which helps to improve 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, thereby facilitating the insertion of the filling structure into the sealing groove of the door and window profile; 3. The present invention provides an elastic lifting structure on the high step surface of the movable die, so that when the door and window profile is placed on the movable die, the door and window profile is lifted from one side by the elastic lifting structure and tilted. When the upper template drives the punch to descend, the tilted door and window profile can ensure that the step surface on the punch 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 squeezed, the controller controls the telescopic mechanism to push forward, and then squeezes the door and window profile laterally from the side of the door and window profile, so that the step on the door and window profile fits with the step surface of the punch and the step surface of the movable die, and then the controller controls the press to continue to move downward, so that the die squeezes the door and window profile downward. During the process, the door and window profile squeezes the elastic lifting structure downward, and when the door and window profile is squeezed between the punch and the movable die, the controller controls the telescopic mechanism to retract, and as the press continues to press downward, the door and window profile is cold-bent. The cooperation of the elastic lifting structure and the telescopic mechanism ensures that the punch does not collide with the door and window profile when pressing down, thereby ensuring safety; and ensures that the door and window profile is closely fitted with the punch and the movable die when the punch is pressed down, thereby ensuring processing accuracy; 4. In the present invention, the filling structure is placed in the guide groove of the guide plate, the linear drive is started, and the motor drives the lead screw to rotate, so that the push plate moves 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 setting of the positioning groove and the guide groove ensures the position accuracy of the filling structure during the pushing process, avoids its deviation, and ensures that the filling structure can be accurately inserted into the sealing groove. After the profile is cold-bent, the linear drive is started in the reverse direction, the push plate moves in the reverse direction, and the pull rope drives the guide plate back. At this time, the filling structure will remain in the sealing groove due to its own elasticity and the friction between the inner wall of the sealing groove, and will be removed by subsequent operations. The use of the insertion mechanism realizes the automation of the filling structure insertion process. Compared with manual insertion, it greatly improves the insertion efficiency and accuracy and reduces the errors that may be caused by manual operation. At the same time, it also reduces the labor intensity of the operator, making the entire process of cold-bent forming of multi-layer sealing groove aluminum alloy door and window profiles more efficient and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0034] Figure 1 This is a schematic diagram of the overall structure of the cold-bend forming mold of the present invention in the interlaced filling structure state; Figure 2 This is a schematic diagram of the overall structure of the cold-bend forming mold of the present invention in a state without interspersed filling structures; Figure 3 It is a structural diagram of the synchronization mechanism in the present invention; Figure 4 It is a structural schematic diagram of the telescopic mechanism of the present invention; Figure 5 This is a schematic structural diagram of the cold-bend forming mold of the present invention when no door and window profiles are placed; Figure 6 It is a structural schematic diagram of the elastic jacking structure of the present invention; Figure 7 It is a structural schematic diagram of the interlacing mechanism in the present invention; Figure 8 It is a structural schematic diagram of the insertion mechanism of the present invention in a state ready for insertion; Figure 9 This is a schematic structural diagram of the interpenetrating mechanism of the present invention in a state where a filling structure is placed; In the figure: punch 1, upper template 2, movable die 3, elastic lifting structure 31, second spring 311, sliding column 312, die bracket 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, limit 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, fixed plate 92, linear drive member 93, push plate 94, positioning groove 941, slider 95, guide plate 96, guide groove 961, pull rope 97, mounting bar 98, limit part 981. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

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

[0037] During operation, the press drives the upper platen 2 downward, causing the punch 1 to descend, performing a cold bend forming operation on the door and window profile, which is placed on the die support 4 and supported by the movable die 3. During this process, the movable die 3 rotates and adjusts accordingly based on the downward pressure of the punch 1 to better accommodate the bending deformation of the profile. Because the filling structure 6 is composed of multiple layers of elastic metal steel sheets, this stacking ensures both flexible bending and excellent support. During cold bending of the profile, it can adapt to the shape changes of the sealing groove while ensuring the shape stability of the sealing groove during the forming process, thereby preventing the profile from cracking or excessive deformation due to localized uneven force. After the cold bending operation is completed, the press drives the upper platen 2 upward, and the punch 1 moves away from the profile. At this point, the filling structure 6 can be removed from the sealing groove of the formed door and window profile to prepare for the next cold bend forming operation. Due to the elasticity of the metal steel sheets, the filling structure 6 can maintain good performance after multiple uses, reducing production costs. Throughout the entire roll-forming process, operators must strictly control the pressure and stroke of the press to ensure that each formed profile meets the design accuracy and quality standards, enabling efficient and stable production of multi-layer sealed 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 steel sheets of the filling structure 6, on the one hand, it can greatly reduce the friction between the metal steel sheets. When the filling structure 6 is bent and deformed as the profile is cold-bent, the wear between the steel sheets due to friction is reduced, and the service life of the filling structure 6 is further extended, so that the filling structure 6 can always maintain a good performance state during the long-term cold-bending operation. Moreover, the reduced friction between the metal steel 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 to move more smoothly in the sealing groove, and it can be more convenient whether it is filling into the sealing groove or taking it out of the sealing groove after the cold-bending operation is completed, 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 adhered to each other under atmospheric pressure, thereby giving the filling structure 6 a certain strength along the length direction, making it easier to insert the filling structure 6 into the sealing groove of the door and window profile.

[0041] The metal steel sheets of the filling structure 6 are 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 via a synchronization mechanism 7; the synchronization mechanism 7 is used to enable the two movable dies 3 to rotate synchronously.

[0043] During operation, when the punch 1 is pressed down to perform the cold bend forming operation, if the two movable dies 3 do not rotate synchronously, it will cause uneven force on both sides of the profile, thereby affecting the bending accuracy and quality of the profile. One side may bend excessively and the other side may bend insufficiently. In severe cases, it may even cause the profile to be scrapped. The setting of the synchronization mechanism 7 effectively avoids this problem. The synchronization mechanism 7 can adopt a chain drive or a gear drive, etc., and connect the two movable dies 3 through a chain or a gear to ensure that they can rotate synchronously during the pressing process of the punch 1, so that the force on both sides of the profile is uniform, and the cold-bend-formed profile has good symmetry and accuracy. In the long-term production process, the synchronization mechanism 7 needs to be regularly inspected and maintained, such as checking the tightness of the chain, the wear of the gears, etc., and timely adjusting or replacing related components to ensure that the synchronization mechanism 7 is always in good working condition, thereby ensuring the smooth cold bend forming operation of the multi-layer sealing groove aluminum alloy door and window profile, further improving production efficiency and product quality, and meeting the 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 hinged shaft end of one of the movable dies 3 is fixedly connected to the first gear 71; the second gear 72, the third gear 73 and the rack structure 741 at one end of the transmission rod 74 are engaged in sequence 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 engaged in sequence above the rack structure 741 at the other end of the transmission rod 74; the fourth gear 77 is fixedly connected to the hinged shaft end of another movable die 3; a first spring 76 is arranged between the other end of the transmission rod 74 and the die bracket 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 starts to rotate, and the first gear 71 fixedly connected to the end of the hinged shaft of the movable die 3 rotates accordingly. The first gear 71 drives the second gear 72 meshing with it to rotate, and the second gear 72 drives the third gear 73 to rotate, thereby causing the rack structure 741 at one end of the transmission rod 74 to be subjected to force. The transmission rod 74 slides along the length direction of the lower template 5 under the restriction of the limit plate 75. During the sliding process of the transmission rod 74, the rack structure 741 at the other end thereof will push the fifth gear 78 meshing with it to rotate, and the fifth gear 78 then drives the fourth gear 77 to rotate. Since the fourth gear 77 is fixedly connected to the end of the hinged shaft of the other movable die 3, the synchronous rotation of the two movable dies 3 is achieved.

[0046] During this process, the first spring 76 is in a compressed state, and its function is to provide a reverse elastic force for the transmission rod 74. After the processed profile is removed, the reverse elastic force can be used to automatically restore the movable die 3 to a horizontal state, thereby facilitating the placement of the profile on the movable die 3, thereby 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 gravity 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 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 provided on the high step surface of the movable die 3, and then when the door and window profile is placed on the movable die 3, the door and window profile is lifted from one side by the elastic lifting structure 31 and tilted. When the upper template 2 drives the punch 1 to descend, the tilted door and window profile can ensure that the step surface on the punch 1 does 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 telescopic mechanism 8 is pushed forward, and then the door and window profile is squeezed sideways from the side of the door and window profile, so that the step on the door and window profile fits with the step surface of the punch 1 and the step surface of the movable die 3. Then the controller controls the press to continue to move downward, and the die presses the door and window profile downward. During this process, the door and window profile squeezes the elastic lifting structure 31 downward. When the door and window profile is squeezed 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 when pressing down, thereby ensuring safety; and ensures that the door and window profile is tightly fitted with the punch 1 and the movable die 3 when the punch 1 presses down, thereby 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 the 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 close to the side of 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 cylinder rod end of the cylinder 82; the cylinder 82 is fixedly connected to the support plate 81.

[0050] During operation, when the door and window profile is placed on the movable die 3, the second spring 311 is in a compressed state, exerting an upward force on the sliding post 312, thereby lifting the door and window 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 post 83 toward the door and window profile. The top plate 84 contacts and squeezes the door and window profile, so that its step aligns with the step surface of the punch 1 and the movable die 3. When the door and window profile is squeezed between the punch 1 and the movable die 3, the cylinder rod 82 retracts, driving the top plate 84 to return to its original position. During this process, the guide post 83 plays a guiding role, ensuring the stability of the movement of the top plate 84 and ensuring the accuracy of the squeezing action.

[0051] During actual production, the performance of the elastic jacking structure 31 and the telescopic mechanism 8 must be regularly inspected. For the elastic jacking structure 31, the elasticity of the second spring 311 must be checked for weakening. Insufficient spring elasticity may result in insufficient lifting height of the door and window profile, thus affecting the safety and fit accuracy of the punch 1 during downward pressure. For the telescopic mechanism 8, the sealing of the cylinder 82 and the wear of the guide post 83 must be inspected. Poor sealing of the cylinder 82 may result in insufficient air pressure, affecting the extrusion force of the top plate 84. Regular inspection and maintenance ensure that the elastic jacking structure 31 and the telescopic mechanism 8 are always in good working condition, further guaranteeing the quality and efficiency of the cold-bend forming of the multi-layer sealed 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 member 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; a linear drive member 93 is provided on the fixed plate 92 along the length direction; the linear drive member 93 is a linear motion component driven by a lead screw and a motor; the linear drive member 93 is used to drive the push plate 94 to move; a positioning groove 941 corresponding to the sealing groove of the door and window profile is provided on the push plate 94; a plurality of sliders 95 are slidably connected to the linear guide rail of the linear drive member 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 fixed plate 92.

[0053] During operation, the filling structure 6 is placed in the guide groove 961 of the guide plate 96, the linear drive part 93 is started, and the motor drives the screw to rotate, so that the push plate 94 moves 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 setting of the positioning groove 941 and the guide groove 961 ensures the position accuracy of the filling structure 6 during the pushing process, avoids its offset, and ensures that the filling structure 6 can be accurately inserted into the sealing groove.

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

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

[0056] By flipping the guide plate 96 90°, the notch of the guide groove 961 on the guide plate 96 is made vertically upward, making it convenient to place 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 the cold-bending forming of the door and window profiles.

[0057] like Figures 1 to 9 As shown, a cold-bending method for multi-layer sealed groove aluminum alloy door and window profiles comprises the following steps: Step 1: Preparation. First, check the various components of the cold-bend forming mold, including the punch 1, die, movable die 3, synchronization mechanism 7, elastic lifting structure 31, telescopic mechanism 8, insertion mechanism 9, etc., to ensure that each component is not damaged and can work normally. At the same time, prepare the required filling structure 6 composed of multiple layers of elastic metal steel sheets, apply lubricating oil between the metal steel sheets, and check whether the magnetic properties of the filling structure 6 meet the requirements to ensure its good performance. In addition, confirm that the pressure and stroke parameters of the press have been accurately set according to the design requirements, and the operator must be familiar with the entire process flow and operating specifications.

[0058] Step 2: Place the profile. Place the aluminum alloy door and window profile to be processed on the movable die 3. The elastic lifting structure 31 will lift the profile from one side, tilting it so that when the punch 1 is pressed down, the stepped surface on the punch 1 does not collide with the steps on the profile, improving the safety of the equipment operation.

[0059] Step 3: The controller controls the telescopic mechanism 8 to push forward, squeezing the door and window profile sideways from the side, so that the step on the profile fits in with 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 then stops pressing down. Step 3: Insert the filling structure 6. The insertion mechanism 9 is activated, and the filling structure 6 is placed in the guide groove 961 of the guide plate 96. The linear drive member 93 drives the push plate 94 to move, smoothly pushing the filling 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 filling structure 6.

[0060] Step 4: Roll-forming. The controller then controls the press to continue downward movement, and the die presses the door and window profile downward. As the press continues to press downward, the roll-forming operation is performed on the door and window profile. During this process, the movable die 3 rotates synchronously with the downward movement of the punch 1 through the synchronization mechanism 7, ensuring uniform force on both sides of the profile. The filling structure 6 also bends and deforms as the profile bends, 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 platen 2 upward, and the punch 1 leaves the profile. At this point, the insertion mechanism 9 is activated in the reverse direction, the push plate 94 moves in the opposite direction, and the pull rope 97 drives the guide plate 96 back. 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 to prepare for the next cold bending operation.

[0062] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. The cold-bending die for multi-layer sealed groove aluminum alloy door and window profiles is characterized by: The invention comprises 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 a door and window profile; the upper template (2) is mounted on the movable end of a press; the upper end of the punch (1) is fixedly connected to the upper template (2); the lower template (5) is mounted on the workbench 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 formed by stacking 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.

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

4. The cold-bending die for the multi-layer sealed groove aluminum alloy door and window profile according to claim 1, characterized in that: The two movable concave dies (3) are connected via a synchronization mechanism (7); the synchronization mechanism (7) is used to enable the two movable concave dies (3) to rotate synchronously.

5. The cold-bending die for the multi-layer sealed groove aluminum alloy door and window profile 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 limit plate (75), a first spring (76), a fourth gear (77) and a fifth gear (78); the hinged shaft end of one of the movable concave molds (3) is fixedly connected to the first gear (71); the lower portion of the first gear (71) is engaged with the second gear (72), the third gear (73) and a rack structure (741) at one end of the transmission rod (74) in sequence; the transmission rod (74) is limited by the limit plate (75) to slide along the length direction of the lower mold plate (5); The limit plate (75) is fixedly connected to the lower template (5); the rack structure (741) at the other end of the transmission rod (74) is meshed with the fifth gear (78) and the fourth gear (77) in sequence; the fourth gear (77) is fixedly connected to the end of the hinged shaft of the other movable die (3); a first spring (76) is arranged 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 die for the multi-layer sealed groove aluminum alloy door and window profile according to claim 1, characterized in that: 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 gravity 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 the step surface of the male die (1) and the step surface of the movable die (3).

7. The cold-bending die for the multi-layer sealed groove aluminum alloy door and window profile according to claim 6, 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 to the 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 side of the upper end of the support plate (81) close to 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 cylinder rod end of the cylinder (82); the cylinder (82) is fixedly connected to the support plate (81).

8. The cold-bend forming die for multi-layer sealed groove aluminum alloy door and window profile 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 member (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); a linear drive member (93) is provided on the fixed plate (92) along the length direction; the linear drive member (93) is a linear motion member driven by a lead screw and a motor; the linear drive member (93) is used to drive the push plate (94) to move; the push plate (94) A positioning groove (941) corresponding to the sealing groove of the door and window profile is provided on the sliding block (95); a plurality of sliding blocks (95) are slidably connected on the linear guide rail of the linear driving member (93); a guide plate (96) is provided on the sliding block (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 fixed plate (92).

9. The cold-bending die for the multi-layer sealed groove aluminum alloy door and window profile according to claim 8, characterized in that: The guide plate (96) is a flip-type structure; a corner at the lower end of the guide plate (96) is hinged to one end of a mounting bar (98); the mounting bar (98) is fixedly connected to the slider (95); and a limiting portion (981) is provided at one end of the mounting bar (98).

10. A cold roll forming method for multi-layer sealed groove aluminum alloy door and window profiles, suitable for the cold roll forming mold according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: Prepare the required filling structure (6) consisting of multiple layers of elastic metal steel sheets and apply lubricating oil between the metal steel sheets; in addition, confirm that the pressure and stroke parameters of the press are accurately set 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 to make it tilt; Step 3: The controller controls the telescopic mechanism (8) to push forward, and squeezes the door and window profile sideways from the side of the profile, so that the step on the profile fits with 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 stops pressing down. Step 3: Place the filling structure (6) in the guide groove (961) of the guide plate (96), and the linear drive member (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 to move downward, and the die squeezes the door and window profile downward. As the press continues to press downward, the door and window profile is cold-bend-formed; Step 5: When 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 insertion mechanism (9) is started in the reverse direction, the push plate (94) moves in the reverse direction, and the pull rope (97) drives the guide plate (96) to retreat. Due to the elasticity of the filling structure (6) itself 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 to carry out the next cold bending forming operation.

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