Free bending method and device for sectional material with connector

Abstract

The invention relates to a free bending method and equipment for a sectional material with a connector. The upper end of a guide base of the free bending equipment for the sectional material with the connector is provided with an opening communicated with an assembly channel; a fixed die is arranged on the assembly channel, a guide groove used for bearing the sectional material is formed in the fixed die in the axial direction in a penetrating mode, a feeding port is formed in the rear end of the guide groove, a discharging port is formed in the front end of the guide groove, an avoiding channel allowing a connector of the sectional material to pass through is formed in the upper portion of the guide groove, and the avoiding channel is located under the opening and communicated with the opening; a first avoiding assembly is arranged at the upper end of the guide base; a first laser sensor is arranged on the portion, on the side of the feeding port, of the guide base, and a second laser sensor is arranged on the portion, on the side of the discharging port, of the free bending mechanism. The free bending mechanism comprises a second avoiding assembly. According to the scheme, it is ensured that a connector of the profile can smoothly pass through the guide mechanism and the bending die in the bending process, automatic fixing and avoiding of the profile with the connector are achieved, manual intervention is reduced, and production efficiency is improved.

Description

A method and equipment for free bending of profiles with joints Technical Field

[0001] This invention relates to the field of aerospace pipe bending machine technology, and in particular to a method and equipment for free bending of profiles with joints. Background Technology

[0002] Aircraft, rockets, spacecraft, and other equipment often employ numerous metal conduits to transport various fluids and support the equipment's flight missions. These conduits are crucial components of these devices. Due to space constraints in the installation of aircraft, rockets, and other equipment, the shapes of these conduits are often complex and curved. Some conduits require multiple complex three-dimensional spatial conduits connected by joints to meet installation space requirements. This process places many special demands on equipment, molds, and motion control during bending.

[0003] Three-dimensional free bending forming, as a significant technological innovation in the field of metal tube plastic forming, offers substantial advantages over traditional bending methods in forming components with multiple bending radii, variable bending radii, small bending radii, and continuous bending without straight sections. It holds significant application prospects in aerospace, nuclear energy equipment, and the automotive industry. Free bending forming of metal tubes is a flexible forming technology based on mold motion trajectory control, possessing considerable technological advantages in manufacturing components with complex three-dimensional axes and continuous bending without straight sections. It represents another breakthrough in recent technological advancements.

[0004] Chinese invention publication CN118681968B discloses a three-dimensional free-form equipment and method based on induction heating and quenching. This invention introduces an induction heating module and a quenching heat treatment module into a six-axis free bending forming technology, bringing a significant innovation to the production process. Through the integrated induction heating device, profiles or pipe components are rapidly heated, effectively reducing the material's deformation resistance and significantly enhancing its formability. Combined with the six-axis free bending equipment's precise control over multiple degrees of freedom, an annular quenching device is equipped at the bending die exit, allowing for immediate cooling after component forming. While this three-dimensional free-form equipment can bend profiles or pipes in multiple degrees of freedom, the clamping mechanism can only accommodate straight pipes. Therefore, this three-dimensional free-form equipment can only bend ordinary straight pipes and cannot perform one-time bending forming of pipes with joints.

[0005] Furthermore, a Chinese utility model publication with publication number CN216068654U discloses a pipe free bending forming bending module, including a spherical bearing, a bending ball mold, a ceramic liner for the bending ball mold, a guide mechanism, and a ceramic liner for the guide mechanism; the ceramic liner for the bending ball mold is interference-fitted inside the bending ball mold; the ceramic liner for the guide mechanism is interference-fitted inside the guide mechanism. The guide mechanism in this design can only accommodate straight pipes, therefore this bending module can only bend ordinary straight pipes and cannot perform one-time bending forming of pipe fittings with joints. Furthermore, a Chinese invention patent with publication number CN115958099A discloses a free bending forming device and its small-radius bending forming method. A pushing mechanism pushes a guide tube through the die hole of a guiding mechanism and a bending die. A pressure roller, capable of moving with the bending die, is installed on the front side of the bending die. During free bending, the guide tube changes the orientation of the die hole, and the portion of the guide tube extending from the die hole abuts against the pressure roller, causing the guide tube to bend once between the guiding mechanism and the bending die. Then, pressure is maintained or a second bending is performed between the pressure roller and the bending die, thereby increasing the space used for bending the pipe fitting, preventing the bent guide tube from springing back, and avoiding processing bends with a radius less than twice the outer diameter of the guide tube within a small space, thus improving the product qualification rate and yield. However, the bending die in this design can only accommodate straight pipes, therefore it cannot perform one-time bending forming of pipe fittings with joints.

[0006] Therefore, existing free bending methods for bending profiles with joints require bending the pipe first, then welding the joint, and then welding the bent pipe again. This process often requires specialized welding personnel and special tooling, which is inefficient and affects production efficiency. Summary of the Invention

[0007] To address the aforementioned problems, the present invention aims to provide a method and apparatus for free bending of profiles with joints, which can automatically avoid and fix the joints, ensure that the profile joints pass smoothly through the guide mechanism and bending die, improve the processing convenience of profiles with joints, increase production efficiency, and reduce manual intervention.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A method for free bending of profiles with joints, using a free bending device for profiles with joints, characterized in that: the free bending device for profiles with joints includes a frame, a feeding trolley and a guide base disposed on the frame, and a free bending mechanism disposed on the side end of the frame;

[0010] An assembly channel is axially extending through the guide base, and an opening communicating with the assembly channel is provided at the upper end of the guide base. A fixed mold is provided on the assembly channel, and a guide groove for supporting the profile is axially extending through the fixed mold. The rear end of the guide groove forms a feed port, the front end of the guide groove forms a discharge port, and the upper part of the guide groove forms a clearance channel that allows the joint of the profile to pass through. The clearance channel is located directly below and communicates with the opening. A first clearance component is provided at the upper end of the guide base. A first laser sensor is provided on the guide base to the side of the feed port, and a second laser sensor is provided on the free bending mechanism to the side of the discharge port. The free bending mechanism includes a second clearance component.

[0011] The free bending method includes:

[0012] S1: The first and second obstacle components of the control system respectively open the obstacle channel and the obstacle opening, and the feeding trolley pushes the profile with the joint forward;

[0013] S2: The first laser sensor on the guide base senses the joint on the profile and sends a signal, records the position of the joint on the profile, and sends it to the control system;

[0014] S3: Based on the position information of the joint measured by the first laser sensor, the control system determines the time when the feeding trolley will send the joint out of the guide base; the feeding trolley pushes the profile so that the joint passes through the avoidance channel on the guide base;

[0015] S4: The second laser sensor detects the joint on the profile and sends a signal, records the position of the joint on the profile, and sends it to the control system;

[0016] S5: Based on the position information of the joint measured by the second laser sensor, the control system determines the time when the feeding trolley will send the joint out of the bending die; the feeding trolley pushes the profile so that the joint passes through the clearance on the bending die.

[0017] S6: The control system controls the first and second avoidance components to move respectively, clamping the profile with the joint;

[0018] S7: The free bending mechanism performs free bending on the profile with joint.

[0019] Preferably, the guide base includes a base body mounted on the frame, and a guide front seat disposed at the front end of the base body and extending into the free bending mechanism;

[0020] The assembly channel includes a first assembly channel formed in the base body and a second assembly channel formed in the guide front seat. The fixing mold includes a first fixing mold installed on the first assembly channel and a second fixing mold installed on the second assembly channel. The first fixing mold and the second fixing mold are arranged at intervals. The rear of the base body is provided with a mating port. The feed port is located at the rear end of the first fixing mold, and the feed port and the first laser sensor are located in the mating port.

[0021] In steps S1 and S2, the front of the feeding trolley extends into the mating port, pushing the profile with the joint forward into the feed port. The first laser sensor senses the joint on the profile, sends a signal, records the joint position, and then sends it to the control system.

[0022] Preferably, the opening includes a first opening formed on the base body and a second opening formed on the guide front seat; the first fixing mold includes a first mold body adapted to be disposed in the first assembly channel, the first mold body is provided with a first clearance channel, the end of the first mold body is provided with a connecting end plate, the rear end of the base body is provided with a connecting groove, and the connecting end plate is adapted to be fixed in the connecting groove; the second fixing mold includes a second mold body disposed in the second assembly channel, the second mold body is provided with a second clearance channel, and the length of the second mold body is less than the length of the second assembly channel; the end of the second mold body is provided with a guide head, the guide groove extends through the guide head, and the guide head abuts and is fixed to the front end of the guide front seat;

[0023] In steps S2 to S5, the first mold body and the second mold body support the profile with joint, and the joint of the profile passes through the first clearance channel and the second clearance channel;

[0024] In step S2, the first laser sensor is set on the side of the connecting end plate to sense and record the position of the connector entering the first mold.

[0025] Preferably, the first avoidance component includes a first avoidance component A, a first avoidance component B, and a first avoidance component C; the first avoidance component A is correspondingly disposed above the first mold body, including a first mounting base fixed to the upper end of the base body, and a plurality of first servo electric cylinders fixed on the first mounting base, wherein the push rod of the first servo electric cylinder is provided with a first clamping module;

[0026] The first obstacle avoidance component B is correspondingly disposed above the second module. The upper end of the guide front seat is provided with an installation plane. The first obstacle avoidance component B includes a second mounting seat fixed on the upper end of the installation plane, and a plurality of second servo electric cylinders fixed on the second mounting seat. The push rod of the second servo electric cylinder is provided with a second clamping module.

[0027] The upper part of the guide head forms a third clearance channel communicating with the guide groove. The first clearance component C includes a third servo electric cylinder fixed on the front part of the second mounting base, and a third clamping module disposed on the push rod of the third servo electric cylinder. The length of the third clamping module matches the length of the third clearance channel.

[0028] The bottom surfaces of the first clamping module, the second clamping module, and the third clamping module are provided with clamping openings that are adapted to the surface of the profile;

[0029] In step S1, the first clamping module, the second clamping module, and the third clamping module are raised to allow the joint on the profile to pass through;

[0030] In step S6, the first clamping module, the second clamping module, and the third clamping module clamp the profile under the action of the servo electric cylinder.

[0031] Preferably, the first opening, the second opening, and the third clearance channel are provided with slots on both sides longitudinally, and the first clamping module, the second clamping module, and the third clamping module are provided with blocks on both sides that engage with the slots.

[0032] In step S1, the first clamping module, the second clamping module, and the third clamping module are lifted, and in step S6, when they are driven to move downward, the card block moves in the card slot.

[0033] Preferably, the clamping module has a connecting hole at its upper end, and a round nut is provided on the outer edge of the upper end of the connecting hole. The lower part of the push rod of the servo electric cylinder is threaded to the round nut and the connecting hole. The inner walls of both sides of the guide groove are provided with first limiting steps, and the lower ends of both sides of the clamping port abut against the first limiting steps.

[0034] In steps S1 and S6, the push rod of the servo electric cylinder is threadedly connected to the clamping module, thereby driving each clamping module to move.

[0035] In step S6, each clamping module clamps the profile, and the lower ends of both sides of the clamping opening abut against the first limiting step.

[0036] Preferably, the free bending mechanism further includes a bending mold base and a bending mold mounted on the bending mold base. The upper end of the bending mold has a clearance opening communicating with the mold hole, and the upper part of the bending mold base has a mounting groove corresponding to the clearance opening. A second laser sensor is provided on the back of the bending mold base. The second clearance component includes a fourth servo electric cylinder, an L-shaped bracket, and a fourth clamping module. The bracket is fixed to the upper end of the bending mold base, and the fourth servo electric cylinder is fixed to the upper end of the bracket. A through hole is provided on the bracket, and the push rod of the fourth servo electric cylinder passes through the through hole and extends into the mounting groove to be fixedly connected to the fourth clamping module.

[0037] In step S1, the fourth servo electric cylinder drives the fourth clamping module to move upward to open the clearance opening and allow the joint on the profile to pass through;

[0038] In step S4, the profile with the joint is pushed forward into the bending die, the second laser sensor senses the joint on the profile, sends a signal and records the joint position, and then sends it to the control system;

[0039] In step S6, the fourth servo electric cylinder drives the fourth clamping module to clamp the profile.

[0040] Preferably, the fourth clamping module is matched with the clearance opening; the clearance opening is T-shaped, and the clearance opening is provided with second limiting steps on both sides, so that the fourth clamping module can be fitted into the clearance opening and the two sides abut against the second limiting steps;

[0041] In step S6, the fourth clamping module is fitted into the clearance opening to form a complete bending mold to clamp the profile.

[0042] Preferably, the free bending mechanism further includes a connecting frame, an anti-interference support, a rotating bracket, and a mounting frame; the end of the frame is provided with a first guide rail laterally, the connecting frame is mounted on the first guide rail via a first slider, a first servo motor is provided on the side of the connecting frame on the frame, and the output end of the first servo motor is connected to the connecting frame; the outer end of the connecting frame is provided with a second guide rail longitudinally, and the lower part of the outer end of the connecting frame is provided with a second servo motor below the anti-interference support, the output end of the second servo motor is connected to the anti-interference support, and the anti-interference support is mounted on the second guide rail via a second slider; the rotating bracket is fitted onto the outer end of the anti-interference support, the anti-interference support is provided with a third servo motor, and the output end of the third servo motor is connected to the rotating bracket; the lower front end of the rotating bracket is provided with a fourth servo motor, the mounting frame is U-shaped, the bending mold base is located inside the mounting frame, the output end of the fourth servo motor passes through the rotating bracket and is supported and connected to the bottom of the mounting frame; the side end of the mounting frame is provided with a fifth servo motor, and the output end of the fifth servo motor is connected to the bending mold base;

[0043] In step S7, the first servo motor can drive the mounting bracket to move left and right; the second servo motor can drive the mounting bracket to move up and down; the third servo motor can drive the mounting bracket to rotate around the profile; the fourth servo motor can drive the mounting bracket to rotate horizontally; and the first servo motor can drive the bending mold base to rotate back and forth.

[0044] A jointed profile free bending device, applied to any of the above-mentioned jointed profile free bending methods.

[0045] The present invention adopts the above technical solution and has the following technical effects:

[0046] ① An opening is provided above the guide base, and a clearance channel is provided on the fixed mold inside the guide base. A servo cylinder is provided above the clearance channel, and a clamping module extending into the clearance channel is provided on the output end of the servo cylinder. The bottom surface of the clamping module has a clamping opening adapted to the profile surface. In this way, the servo cylinder can drive the clamping module to move upward to open the clearance channel and clearance opening, thereby allowing the joint on the profile to move forward along the clearance channel. A first laser sensor is provided at the feed port of the fixed mold. In this way, when the feeding trolley pushes the pipe forward, the first laser sensor senses the joint on the pipe and sends a signal, and records the joint. Using the feeding trolley as a coordinate system, the time it takes for the joint to pass through the guide base is determined at the position on the pipe fitting (the feeding trolley is controlled by a servo motor, and the control system controls the servo motor, which in turn controls the pushing speed of the pipe fitting). After the joint on the profile passes through the clearance channel, the second laser sensor sends a signal to the joint on the pipe fitting and records the position of the joint on the pipe fitting. Using the feeding trolley as a coordinate system, the time it takes for the joint to pass through the bending die is determined. After the joint on the profile passes through the clearance opening, the control system controls each servo electric cylinder to drive each clamping module to move down, clamping the profile with the joint, and then performing the bending operation on the profile with the joint.

[0047] In this way, the solution achieves automated fixing and avoidance of profiles with joints, reduces manual intervention, and ensures that the joints of the profiles can pass smoothly through the guide mechanism and bending die during the bending process. This effectively prevents the joints from getting stuck or interfering with the fixing components, improves processing efficiency and safety, and at the same time ensures the continuity and accuracy of profile bending, thereby improving production efficiency.

[0048] ② This solution incorporates multiple clamping modules, which enhances the clamping effect on the pipe fittings.

[0049] ③ The servo electric cylinder driven clamping module features high control precision, high efficiency and energy saving, good reliability and low maintenance cost, ensuring clamping and guiding accuracy and the convenience of automated control.

[0050] ④ The locking blocks and slots on both sides of the clamping module on the guide base cooperate to provide lateral positioning and guidance for each clamping module when it moves up and down, preventing it from swaying or twisting in the avoidance channel, and ensuring that the clamping port can be accurately aligned and stably clamp the profile, thus improving the positioning accuracy and reliability.

[0051] ⑤ The bending die adopts a split design. The clamping module on the bending die base matches the clearance opening. In this way, the clamping module can accurately and stably extend into the clearance opening to achieve reliable clamping and release of the profile. Attached Figure Description

[0052] Figure 1 is a schematic diagram of the steps of a method for free bending of a profile with a joint.

[0053] Figure 2 is a three-dimensional structural schematic diagram of a profile free bending device with a joint.

[0054] Figure 3 is a three-dimensional structural schematic diagram of a free bending device for profiles with joints from another perspective.

[0055] Figure 4 is an enlarged view of point A in Figure 3.

[0056] Figure 5 is a schematic diagram of the arrangement of servo electric cylinders on the guide base and bending mold base.

[0057] Figure 6 is a schematic diagram of the cooperation between the feeding trolley and the guide base.

[0058] Figure 7 is a schematic diagram of the arrangement of the first laser sensor.

[0059] Figure 8 is a schematic diagram of the servo electric cylinder arrangement from another perspective on the guide base.

[0060] Figure 9 is a three-dimensional structural diagram of the guide base.

[0061] Figure 10 is a three-dimensional structural diagram of the guide base from another perspective.

[0062] Figure 11 is a three-dimensional structural diagram of the first fixed mold.

[0063] Figure 12 is a three-dimensional structural diagram of the second fixed mold.

[0064] Figure 13 is a three-dimensional structural diagram of the first avoidance component A.

[0065] Figure 14 is a schematic diagram of the installation of the first avoidance component B and the first avoidance component C.

[0066] Figure 15 is a schematic diagram of the arrangement of round nuts.

[0067] Figure 16 is a three-dimensional structural diagram of the first clamping module and the second clamping module.

[0068] Figure 17 is a three-dimensional structural diagram of the third clamping module.

[0069] Figure 18 is a schematic diagram of the fourth clamping module clamping the profile.

[0070] Figure 19 is a schematic diagram showing the fourth clamping module opening the clearance port to allow the connector to pass through.

[0071] Figure 20 is a schematic diagram of the arrangement of laser sensors on the back of the bending mold base.

[0072] Figure 21 is a three-dimensional structural diagram of the second avoidance component.

[0073] Figure 22 is a schematic diagram of the three-dimensional structure of the bending die.

[0074] Figure 23 is a three-dimensional structural diagram of the bending mold base.

[0075] Figure 24 is a schematic diagram of the arrangement of the first servo motor on the frame.

[0076] Figure 25 is a schematic diagram of the arrangement of the second servo motor on the connecting frame.

[0077] Figure 26 is a schematic diagram of the arrangement of the third servo motor on the anti-interference support.

[0078] Figure 27 is a schematic diagram of the arrangement of the fourth servo motor on the rotating support. Detailed Implementation

[0079] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0080] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless explicitly defined otherwise.

[0082] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0083] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0084] As shown in Figures 1-27, a method for free bending of a profile with joints is adopted. The free bending equipment for profiles with joints includes a frame 1, a feeding trolley 2 and a guide base 3 set on the frame 1, and a free bending mechanism set on the side end of the frame 1.

[0085] An assembly channel is provided axially through the guide base 3, and an opening communicating with the assembly channel is provided at the upper end of the guide base 3. A fixed mold is provided on the assembly channel, and a guide groove 4 for supporting the profile is provided axially through the fixed mold. The rear end of the guide groove 4 forms a feed port, the front end of the guide groove 4 forms a discharge port, and the upper part of the guide groove 4 forms a clearance channel that allows the joint 7 of the profile to pass through. The clearance channel is located directly below and communicates with the opening. A first clearance component is provided at the upper end of the guide base 3. A first laser sensor 5 is provided on the side of the feed port on the guide base 3, and a second laser sensor 6 is provided on the side of the discharge port on the free bending mechanism. The free bending mechanism includes a second clearance component.

[0086] As shown in Figure 1, a method for free bending of a profile with a joint includes the following steps:

[0087] S1: The first and second obstacle components of the control system respectively open the obstacle channel and the obstacle opening 9, and the feeding trolley 2 pushes the profile with the joint forward.

[0088] S2: The first laser sensor 5 on the guide base 3 senses the joint 7 on the profile and sends a signal, records the position of the joint 7 on the profile, and sends it to the control system;

[0089] S3: Based on the position information of the connector 7 measured by the first laser sensor 5, the control system determines the time when the feeding trolley 2 sends the connector 7 out of the guide base 3; the feeding trolley 2 pushes the profile so that the connector 7 passes through the avoidance channel on the guide base 3;

[0090] S4: The second laser sensor 6 senses the joint 7 on the profile and sends a signal, records the position of the joint 7 on the profile, and sends it to the control system;

[0091] S5: Based on the position information of the joint 7 measured by the second laser sensor 6, the control system determines the time when the feeding trolley 2 sends the joint 7 out of the bending die 8; the feeding trolley 2 pushes the profile so that the joint 7 passes through the clearance opening 9 on the bending die 8.

[0092] S6: The control system controls the first and second avoidance components to move respectively, clamping the profile with the joint;

[0093] S7: The free bending mechanism performs free bending on the profile with joint.

[0094] In the above technical solution, an opening is provided above the guide base, and a clearance channel is provided on the fixed mold inside the guide base. A servo electric cylinder is provided above the clearance channel, and a clamping module extending into the clearance channel is provided on the output end of the servo electric cylinder. The bottom surface of the clamping module has a clamping opening adapted to the profile surface. In this way, the servo electric cylinder can drive the clamping module to move upward to open the clearance channel and the clearance opening, thereby allowing the joint on the profile to move forward along the clearance channel. A first laser sensor is provided at the feed port of the fixed mold. In this way, when the feeding trolley pushes the pipe forward, the first laser sensor senses the joint on the pipe and emits a signal, and records the position of the joint on the pipe. The location (knowing the length between the connector and the front end of the pipe) is used as a coordinate system to determine the time it takes for the connector to pass through the guide base (the feeding trolley is controlled by a servo motor, and the control system controls the servo motor to control the pushing speed of the pipe). After the connector on the profile passes through the clearance channel, the second laser sensor sends a signal to the connector on the pipe and records the position of the connector on the pipe. Using the feeding trolley as a coordinate system, the time it takes for the connector to pass through the bending die is determined. After the connector on the profile passes through the clearance opening, the control system controls each servo electric cylinder to drive each clamping module to move down, clamping the profile with the connector, and then performing the bending operation of the profile with the connector.

[0095] In this way, the solution achieves automated fixing and avoidance of profiles with joints, reduces manual intervention, and ensures that the joints of the profiles can pass smoothly through the guide mechanism and bending die during the bending process. This effectively prevents the joints from getting stuck or interfering with the fixing components, improves processing efficiency and safety, and at the same time ensures the continuity and accuracy of profile bending, thereby improving production efficiency.

[0096] As shown in Figures 5-12, the guide base 3 includes a base body 10 mounted on the frame 1, and a guide front seat 11 disposed at the front end of the base body 10 and extending into the free bending mechanism;

[0097] The assembly channels include a first assembly channel 12 formed within the base body 10 and a second assembly channel 13 formed within the guide front seat 11. The fixing mold includes a first fixing mold 14 mounted on the first assembly channel 12 and a second fixing mold 15 mounted on the second assembly channel 13. The first fixing mold 14 and the second fixing mold 15 are arranged at intervals. The rear of the base body 10 is provided with a mating port 16. The feed port is located at the rear end of the first fixing mold 14, and the feed port and the first laser sensor 5 are located within the mating port 16.

[0098] In step S1, the front of the feeding trolley 2 extends into the mating port 16, pushing the profile with the joint forward into the feed port. The first laser sensor 5 senses the joint 7 on the profile, sends a signal, records the position of the joint 7, and then sends it to the control system.

[0099] In the above technical solution, the guide base is divided into a base body and a guide front seat that extends into the bending device. The base body is mounted on the frame, which enhances the structural stability of the entire assembly. The fixed mold is also segmented accordingly, reducing its configuration cost while providing effective support. This facilitates segmented installation, debugging, and maintenance, improving equipment integration and reliability. Furthermore, a clearance opening is provided at the rear of the base body to accommodate the feed inlet and laser sensor. The shaft 200 of the feeding trolley 100, which holds the pipe fitting, can extend into the clearance opening to push the pipe fitting into the guide base. This effectively utilizes space, increases the conveying distance of the feeding trolley, optimizes the layout, and reduces external interference to the laser sensor, improving the accuracy of joint position detection.

[0100] As shown in Figures 9-12, the opening includes a first opening 17 formed on the base body 10 and a second opening 18 formed on the guide front seat 11; the first fixing mold 14 includes a first mold body 19 adapted to be disposed in the first assembly channel 12, the first mold body 19 is provided with a first clearance channel 20, the end of the first mold body 19 is provided with a connecting end plate 21, the rear end of the base body 10 is provided with a connecting groove 22, and the connecting end plate 21 is adapted to be fixed in the connecting groove 22; the second fixing mold 15 includes a second mold body 23 disposed in the second assembly channel 13, the second mold body 23 is provided with a second clearance channel 24, the length of the second mold body 23 is less than the length of the second assembly channel 13; the end of the second mold body 23 is provided with a guide head 25, the guide groove 4 extends through the guide head 25, and the guide head 25 abuts and is fixed to the front end of the guide front seat 11;

[0101] In steps S2 to S5, the first mold 19 and the second mold 23 support the profile with joint, and the joint 7 of the profile passes through the first clearance channel 20 and the second clearance channel 24.

[0102] In step S2, the first laser sensor 5 is set on the side of the connecting end plate 21 to sense and record the position of the connector 7 entering the first mold 19.

[0103] In the above technical solution, the first fixed mold is fixed by the end plate and the connecting groove at the rear end of the base body, which ensures the accurate positioning and firm installation of the first mold body; the second fixed mold is shorter than the assembly channel and has a guide head at the end, which reduces the configuration cost of the fixed mold while providing effective support; the guide head is set on the front side of the second mold body, which facilitates the positioning and firm installation of the second mold body, and at the same time allows the pipe to be guided into the bending equipment more smoothly through the guide head, improving the guiding accuracy and stability of the feeding.

[0104] As shown in Figures 4-8 and 13 and 14, the first avoidance component includes a first avoidance component A, a first avoidance component B and a first avoidance component C; the first avoidance component A is correspondingly disposed above the first mold body 19, including a first mounting base 26 fixed to the upper end of the base body 10, and a plurality of first servo electric cylinders 27 fixed on the first mounting base 26, and a first clamping module 28 is provided on the push rod of the first servo electric cylinder 27;

[0105] The first obstacle avoidance component B is correspondingly disposed above the second module 23. The upper end of the guide front seat 11 is provided with an installation plane. The first obstacle avoidance component B includes a second mounting seat 29 fixed on the upper end of the installation plane, and a plurality of second servo electric cylinders 30 fixed on the second mounting seat 29. The push rod of the second servo electric cylinder 30 is provided with a second clamping module 31.

[0106] The upper part of the guide head 25 has a third clearance channel 32 that communicates with the guide groove 4. The first clearance component C includes a third servo electric cylinder 33 fixed on the front of the second mounting base 29, and a third clamping module 34 disposed on the push rod of the third servo electric cylinder 33. The length of the third clamping module 34 matches the length of the third clearance channel 32.

[0107] The bottom surfaces of the first clamping module 28, the second clamping module 31 and the third clamping module 34 are provided with clamping openings 35 that are adapted to the surface of the profile;

[0108] In step S1, the first clamping module 28, the second clamping module 31 and the third clamping module 34 lift the joint 7 on the profile to allow it to pass through;

[0109] In step S6, the first clamping module 28, the second clamping module 31 and the third clamping module 34 clamp the profile under the action of the servo electric cylinder.

[0110] In the above technical solution, the avoidance components are divided into three parts: First Avoidance Component A, First Avoidance Component B, and First Avoidance Component C. First Avoidance Component A is mounted on the base body, while First Avoidance Components B and C are mounted on the guide front seat, enhancing the clamping effect on the pipe fitting. The third clamping module matches the shape of the guide head, achieving precise clamping, guiding, and avoidance protection for the profile joint as it enters the bending equipment, ensuring unobstructed passage of the joint throughout the process, and further improving the reliability and yield of the processing.

[0111] As shown in Figures 9, 10, and 15-17, slots 36 are longitudinally provided on both sides of the first opening 17, the second opening 18, and the third clearance channel 32. Locking blocks 37 that engage with the slots 36 are provided on both sides of the first clamping module 28, the second clamping module 31, and the third clamping module 34. In step S1, when the first clamping module 28, the second clamping module 31, and the third clamping module 34 are lifted, and in step S6, when they are driven downwards, the locking blocks 37 move within the slots 36. In this technical solution, the locking blocks on both sides of the clamping modules engage with the slots, providing lateral positioning and guidance for each clamping module during its up-and-down movement, preventing swaying or twisting within the clearance channel, and ensuring accurate alignment and stable clamping of the profile, thus improving positioning accuracy and reliability.

[0112] As shown in Figures 11-17, the upper ends of the first clamping module 28, the second clamping module 31, and the third clamping module 34 are provided with connecting holes. A round nut 38 is provided on the outer edge of the upper end of the connecting hole. The lower part of the push rod of the servo cylinder is threadedly connected to the round nut 38 and the connecting hole. The inner walls of both sides of the guide groove 4 are provided with first limiting steps 39, and the lower ends of both sides of the clamping opening 35 abut against the first limiting steps 39. In steps S1 and S6, the push rod of the servo cylinder is threadedly connected to the clamping module, driving each clamping module to move. In step S6, each clamping module clamps the profile, and the lower ends of both sides of the clamping opening 35 abut against the first limiting steps 39. In this technical solution, the clamping module and the servo cylinder push rod are connected by a round nut and threaded connection, achieving a firm mechanical locking, reliable connection, and the ability to withstand certain lateral forces. At the same time, this structure is easy to disassemble, facilitating the replacement, maintenance, or adjustment of the clamping modules according to different profile specifications, thus improving the adaptability and maintainability of the equipment.

[0113] The limiting step on the inner wall of the guide groove abuts against the lower end of the clamping port, providing a clear mechanical limit for the downward movement of the clamping module, preventing it from excessively pressing down and damaging the profile, ensuring the clamping effect, and ensuring the consistency of the clamping height, thus improving the uniformity of clamping and the stability of the profile.

[0114] As shown in Figures 19-23, the free bending mechanism further includes a bending mold base 40 and a bending mold 8 mounted on the bending mold base 40. The upper end of the bending mold 8 is provided with a clearance opening 9 communicating with the mold hole 41. The upper part of the bending mold base 40 is provided with a mounting groove 42 corresponding to the clearance opening 9. A second laser sensor 6 is provided on the back of the bending mold base 40. The second clearance component includes a fourth servo electric cylinder 43, an L-shaped bracket 44 and a fourth clamping module 45. The bracket 44 is fixed to the upper end of the bending mold base 40, and the fourth servo electric cylinder 43 is fixed to the upper end of the bracket 44. A through hole is provided on the bracket 44, and the push rod of the fourth servo electric cylinder 43 passes through the through hole and extends into the mounting groove 42 to be fixedly connected to the fourth clamping module 45.

[0115] In step S1, the fourth servo electric cylinder 43 drives the fourth clamping module 45 to move upward and open the clearance opening 9 to allow the joint 7 on the profile to pass through;

[0116] In step S4, the profile with the joint is pushed forward into the bending die 8. The second laser sensor 6 senses the joint 7 on the profile, sends a signal and records the position of the joint 7, and then sends it to the control system.

[0117] In step S6, the fourth servo electric cylinder 43 drives the fourth clamping module 45 to clamp the profile.

[0118] In the above technical solution, an installation groove is set on the upper part of the bending die base, and an avoidance opening communicating with the installation groove is set on the bending die. A fourth servo electric cylinder is set at the upper end of the bending die base. The bending die adopts a split structure. A fourth clamping module is set on the output end of the fourth servo electric cylinder. The fourth servo electric cylinder can drive the fourth clamping module to move upward to open the avoidance opening to allow the joint on the profile to pass through. The feeding trolley pushes the pipe forward (the feeding trolley is controlled by a servo motor). The laser sensor senses the joint on the pipe and sends a signal, and records the position of the joint on the pipe. Using the feeding trolley as a coordinate system, the time it takes for the joint to pass through the bending die can be obtained. After the joint on the profile passes through the avoidance opening, the fourth servo electric cylinder can drive the fourth clamping module to move downward along the installation groove and extend into the avoidance opening to clamp the profile. This realizes the automated fixing and avoidance of the profile with joint, ensuring that the joint of the profile can pass smoothly through the bending die during the bending process, effectively preventing the joint from getting stuck or interfering with the bending components, improving processing efficiency and safety, and ensuring the continuity and accuracy of the profile bending.

[0119] Furthermore, the fourth clamping module 45 matches the clearance opening 9; the clearance opening 9 is T-shaped, and second limiting steps 46 are provided on both sides inside the clearance opening 9. The fourth clamping module 45 can be fitted into the clearance opening 9 and its two sides abut against the second limiting steps 46; in step S6, the fourth clamping module 45 is fitted into the clearance opening 9 to form a complete bending mold 8 to clamp the profile. The fourth clamping module matches the clearance opening, so that the clearance module can accurately and stably extend into the clearance opening, realizing reliable clamping and release of the profile. The lower end of the fourth clamping module cooperates with the limiting steps, providing a clear mechanical limit for the downward movement of the fourth clamping module, preventing it from excessively pressing down and damaging the profile, and ensuring the clamping effect and the stability of the profile.

[0120] In addition, the upper end of the fourth clamping module is threadedly connected to the push rod of the servo electric cylinder. This threaded connection secures the clearance module and the servo electric cylinder push rod, facilitating installation, disassembly, and maintenance while ensuring connection strength and reliable motion transmission. A guide ramp is provided at the outer end of the second limiting step, making it easier for the fourth clamping module to align and slide into the lower part of the clearance opening. This reduces the difficulty of alignment during assembly and movement, and improves the system's response speed and reliability.

[0121] As shown in Figures 2-4 and 24-27, the free bending mechanism also includes a connecting frame 47, an anti-interference support 48, a rotating bracket 49, and a mounting bracket 50. A first guide rail 59 is laterally provided at the end of the frame 1. The connecting frame 47 is mounted on the first guide rail 59 via a first slider 58. A first servo motor 51 is provided on the side of the connecting frame 47 on the frame 1, and the output end of the first servo motor 51 is connected to the connecting frame 47. A second guide rail 52 is longitudinally provided at the outer end of the connecting frame 47. A second servo motor 53 is provided below the anti-interference support 48 at the lower part of the outer end of the connecting frame 47. The output end of the second servo motor 53 is connected to the anti-interference support 48, and the anti-interference support 48 is mounted on the second guide rail 52 via a second slider 54. The rotating bracket 49 is sleeved on the outer end of the anti-interference support 48, and the anti-interference support 48 is provided with a first servo motor 50. Three servo motors 55 are used, with the output end of the third servo motor 55 connected to the rotating bracket 49. A fourth servo motor 56 is located at the lower front end of the rotating bracket 49. The mounting frame 50 is U-shaped, with a bending mold seat located inside the mounting frame 50. The output end of the fourth servo motor 56 passes through the rotating bracket 49 and is supported and connected to the bottom of the mounting frame 50. A fifth servo motor 57 is located on the side end of the mounting frame 50, with its output end connected to the bending mold seat 40. In step S7, the first servo motor 51 can drive the mounting frame 50 to move left and right; the second servo motor 53 can drive the mounting frame 50 to move up and down; the third servo motor 55 can drive the mounting frame 50 to rotate around the profile; the fourth servo motor 56 can drive the mounting frame 50 to rotate horizontally; and the first servo motor 51 can drive the bending mold seat 40 to rotate back and forth. The above-mentioned free bending mechanism can realize three-dimensional bending of profiles with joints. Specific bending actions can be found in patent documents such as CN107350321B and CN118681968B.

[0122] In addition, the pushing mechanism of the feeding trolley can be referenced in patent documents such as CN113617955B and EP1413369B1.

[0123] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A method for free bending of a profile with a joint, using a free bending device for profiles with joints, characterized in that: The free bending equipment for profiles with joints includes a frame (1), a feeding trolley (2) and a guide base (3) mounted on the frame (1), and a free bending mechanism mounted on the side of the frame (1); the guide base (3) has an assembly channel running through it along the axial direction, and the upper end of the guide base (3) has an opening communicating with the assembly channel; a fixed mold is mounted on the assembly channel, and a guide groove (4) for supporting the profile runs through it along the axial direction. The rear end of the guide groove (4) forms an inlet, the front end of the guide groove (4) forms an outlet, and the upper part of the guide groove (4) forms a... An obstacle avoidance channel is provided to allow the joint (7) of the profile to pass through. The obstacle avoidance channel is located directly below and connected to the opening. A first obstacle avoidance component is provided at the upper end of the guide base (3). A first laser sensor (5) is provided on the side of the feed port on the guide base (3), and a second laser sensor (6) is provided on the side of the discharge port on the free bending mechanism. The free bending mechanism includes a second obstacle avoidance component. The free bending method includes: S1: The control system controls the first obstacle avoidance component and the second obstacle avoidance component to open the obstacle avoidance channel and the obstacle avoidance opening (9) respectively. The feeding trolley (2) will carry the... S2: The first laser sensor (5) on the guide base (3) senses the joint (7) on the profile and sends a signal, recording the position of the joint (7) on the profile and sending it to the control system; S3: Based on the position information of the joint (7) measured by the first laser sensor (5), the control system determines the time when the feeding trolley (2) sends the joint (7) out of the guide base (3); The feeding trolley (2) pushes the profile so that the joint (7) passes through the clearance channel on the guide base (3); S4: The second laser sensor (6) senses the joint on the profile The head (7) sends a signal to record the position of the connector (7) on the profile and sends it to the control system; S5: Based on the position information of the connector (7) measured by the second laser sensor (6), the control system determines the time when the feeding trolley (2) sends the connector (7) out of the bending die (8); The feeding trolley (2) pushes the profile so that the connector (7) passes through the clearance opening (9) on the bending die (8); S6: The control system controls the first clearance component and the second clearance component to act respectively to clamp the profile with the connector; S7: The free bending mechanism acts to freely bend the profile with the connector.

2. The method for free bending of a profile with a joint according to claim 1, characterized in that: The guide base (3) includes a base body (10) mounted on the frame (1) and a guide front seat (11) disposed at the front end of the base body (10) and extending into the free bending mechanism; the assembly channel includes a first assembly channel (12) formed in the base body (10) and a second assembly channel (13) formed in the guide front seat (11); the fixing mold includes a first fixing mold (14) mounted on the first assembly channel (12) and a second fixing mold (15) mounted on the second assembly channel (13). The first fixed mold (14) and the second fixed mold (15) are arranged at intervals; the rear part of the base body (10) is provided with a mating port (16), the feed port is set at the rear end of the first fixed mold (14), and the feed port and the first laser sensor (5) are set in the mating port (16); in steps S1 and S2, the front part of the feeding trolley (2) extends into the mating port (16), pushes the profile with the joint forward into the feed port, the first laser sensor (5) senses the joint (7) on the profile and sends a signal and records the position of the joint (7), and then sends it to the control system.

3. The method for free bending of a profile with a joint according to claim 2, characterized in that: The openings include a first opening (17) formed on the base body (10) and a second opening (18) formed on the guide front seat (11); the first fixed mold (14) includes a first mold body (19) adapted to be disposed in the first assembly channel (12), the first mold body (19) is provided with a first clearance channel (20), the end of the first mold body (19) is provided with a connecting end plate (21), the rear end of the base body (10) is provided with a connecting groove (22), and the connecting end plate (21) is adapted to be fixed in the connecting groove (22); the second fixed mold (15) includes a second mold body (23) disposed in the second assembly channel (13), the second mold body (23) is provided with There is a second clearance channel (24), and the length of the second mold (23) is less than the length of the second assembly channel (13); the end of the second mold (23) is provided with a guide head (25), and the guide groove (4) extends through the guide head (25), and the guide head (25) abuts and is fixed to the front end of the guide front seat (11); in steps S2 to S5, the first mold (19) and the second mold (23) support the profile with the joint, and the joint (7) of the profile passes through the first clearance channel (20) and the second clearance channel (24); in step S2, the first laser sensor (5) is set on the side end of the connecting end plate (21) to sense and record the position of the joint (7) entering the first mold (19).

4. The method for free bending of a profile with a joint according to claim 3, characterized in that: The first avoidance component includes a first avoidance component A, a first avoidance component B, and a first avoidance component C; the first avoidance component A is correspondingly disposed above the first mold (19), including a first mounting base (26) fixed to the upper end of the base body (10), and a plurality of first servo electric cylinders (27) fixed on the first mounting base (26), and a first clamping module (28) is provided on the push rod of the first servo electric cylinder (27); the first avoidance component B is correspondingly disposed above the second mold (23), and the upper end of the guide front seat (11) is provided with a mounting plane, the first avoidance component B includes a second mounting base (29) fixed to the upper end of the mounting plane, and a plurality of second servo electric cylinders (30) fixed on the second mounting base (29), and a second clamping module (31) is provided on the push rod of the second servo electric cylinder (30); the upper part of the guide head (25) is shaped The first clearance component C includes a third servo cylinder (33) fixed on the front of the second mounting base (29) and a third clamping module (34) set on the push rod of the third servo cylinder (33). The length of the third clamping module (34) matches the length of the third clearance channel (32). The bottom surfaces of the first clamping module (28), the second clamping module (31) and the third clamping module (34) are provided with clamping openings (35) adapted to the surface of the profile. In step S1, the first clamping module (28), the second clamping module (31) and the third clamping module (34) are raised to allow the joint (7) on the profile to pass through. In step S6, the first clamping module (28), the second clamping module (31) and the third clamping module (34) clamp the profile under the action of the servo cylinder.

5. The method for free bending of a profile with a joint according to claim 4, characterized in that: The first opening (17), the second opening (18) and the third clearance channel (32) are provided with slots (36) on both sides. The first clamping module (28), the second clamping module (31) and the third clamping module (34) are provided with blocks (37) that engage with the slots (36) on both sides. In step S1, the first clamping module (28), the second clamping module (31) and the third clamping module (34) are lifted, and in step S6, when they are driven to move down, the blocks (37) move in the slots (36).

6. The method for free bending of a profile with a joint according to claim 4, characterized in that: The upper ends of the first clamping module (28), the second clamping module (31) and the third clamping module (34) are provided with connecting holes, and the upper outer edge of the connecting hole is provided with a round nut (38). The lower part of the push rod of the servo electric cylinder is threadedly connected to the round nut (38) and the connecting hole. The inner walls of both sides of the guide groove (4) are provided with a first limiting step (39), and the lower ends of both sides of the clamping port (35) abut against the first limiting step (39). In steps S1 and S6, the push rod of the servo electric cylinder is threadedly connected to the clamping module, and drives each clamping module to move. In step S6, each clamping module clamps the profile, and the lower ends of both sides of the clamping port (35) abut against the first limiting step (39).

7. The method for free bending of a profile with a joint according to claim 1, characterized in that: The free bending mechanism further includes a bending die base (40) and a bending die (8) mounted on the bending die base (40). The upper end of the bending die (8) is provided with a clearance opening (9) communicating with the die hole (41). The upper part of the bending die base (40) is provided with a mounting groove (42) corresponding to the clearance opening (9). A second laser sensor (6) is provided on the back of the bending die base (40). The second clearance component includes a fourth servo electric cylinder (43), an L-shaped bracket (44), and a fourth clamping module (45). The bracket (44) is fixed to the upper end of the bending die base (40), and the fourth servo electric cylinder (43) is fixed to the upper end of the bracket (44). A through hole is provided on the frame (44), and the push rod of the fourth servo electric cylinder (43) passes through the through hole and extends into the mounting groove (42) to be fixedly connected to the fourth clamping module (45); in step S1, the fourth servo electric cylinder (43) drives the fourth clamping module (45) to move upward and open the clearance opening (9) to allow the joint (7) on the profile to pass through; in step S4, the profile with the joint is pushed forward into the bending mold (8), the second laser sensor (6) senses the joint (7) on the profile, sends a signal and records the position of the joint (7), and then sends it to the control system; in step S6, the fourth servo electric cylinder (43) drives the fourth clamping module (45) to clamp the profile.

8. The method for free bending of a profile with a joint according to claim 7, characterized in that: The fourth clamping module (45) is matched with the clearance opening (9); the clearance opening (9) is T-shaped, and the clearance opening (9) has second limiting steps (46) on both sides. The fourth clamping module (45) can be fitted into the clearance opening (9) and the two sides abut against the second limiting steps (46); in step S6, the fourth clamping module (45) is fitted into the clearance opening (9) to form a complete bending mold (8) to clamp the profile.

9. A method for free bending of a profile with a joint according to claim 7, characterized in that: The free bending mechanism also includes a connecting frame (47), an anti-interference support (48), a rotating bracket (49), and a mounting bracket (50); the end of the frame (1) is provided with a first guide rail (59) laterally, the connecting frame (47) is mounted on the first guide rail (59) via a first slider (58), a first servo motor (51) is provided on the side of the connecting frame (47) on the frame (1), and the output end of the first servo motor (51) is connected to the connecting frame (47); the outer end of the connecting frame (47) is provided with a second guide rail (52) longitudinally, and the lower part of the outer end of the connecting frame (47) is provided with a second servo motor (53) below the anti-interference support (48), the output end of the second servo motor (53) is connected to the anti-interference support (48), and the anti-interference support (48) is mounted on the second guide rail (52) via a second slider (54); the rotating bracket (49) is sleeved on the outer end of the anti-interference support (48), and the anti-interference support (48) is provided with a third servo motor. The machine (55), the output end of the third servo motor (55) is connected to the rotating bracket (49); the lower front end of the rotating bracket (49) is provided with a fourth servo motor (56), the mounting frame (50) is U-shaped, the bending mold base is set inside the mounting frame (50), the output end of the fourth servo motor (56) passes through the rotating bracket (49) and is supported and connected to the bottom of the mounting frame (50); the side end of the mounting frame (50) is provided with a fifth servo motor (57), the output end of the fifth servo motor (57) is connected to the bending mold base (40); in step S7, the first servo motor (51) can drive the mounting frame (50) to move left and right; the second servo motor (53) can drive the mounting frame (50) to move up and down; the third servo motor (55) can drive the mounting frame (50) to rotate around the profile; the fourth servo motor (56) can drive the mounting frame (50) to rotate horizontally; the first servo motor (51) can drive the bending mold base (40) to rotate back and forth.

10. A device for free bending of profiles with joints, characterized in that: A method for free bending of a jointed profile applied to any one of claims 1 to 9 above.

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