Passive door and window frame welding device

Abstract

The invention discloses a passive type door and window frame welding device, and relates to the technical field of laser seamless welding, and the passive type door and window frame welding device comprises a welding table with a working face for placing a frame; the welding unit is connected with the welding table, and the welding unit is provided with a welding gun facing the working face; the clamping units are used for clamping a frame placed on the workbench, each clamping unit at least comprises a first clamping piece and a second clamping piece, and the first clamping pieces and the second clamping pieces are at least attached to one face of the frame; wherein the first clamping piece and the second clamping piece are arranged at least in the first direction, and the first clamping piece and the second clamping piece in the same clamping unit work in a mutual exclusion mode in the clamping operation. Through the telescopic and foldable clamping units, the switchable connecting parts and force closed-loop control based on pressure sensing, dynamic coordination of clamping and welding passages is achieved.

Description

Technical Field

[0001] This application relates to the field of laser seamless welding technology, specifically a passive door and window frame welding device. Background Technology

[0002] Passive windows, also known as thermally broken aluminum windows, offer significant improvements in insulation, airtightness, and thermal bridging control compared to ordinary windows. Passive window frames place greater emphasis on "thermal bridging continuity, corner sealing, and structural stability" in their welding processes compared to ordinary windows. Common practices include using thermally broken profiles combined with seamless welding or corner sealing techniques to ensure airtightness and thermal performance. Seamlessly welded thermally broken aluminum windows incorporate a thermal break design on top of seamless welding technology. This effectively blocks external and internal temperatures, preventing high outdoor temperatures from entering the room and maintaining a cool indoor environment.

[0003] CN115805371B discloses a multi-angle seamless welding device for bipolar plates in hydrogen fuel cell vehicles. This device relates to the field of bipolar plate welding technology and includes: a base plate; at least four columns, each mounted on the upper surface of the base plate; a top plate mounted on the columns; four rotary cylinders symmetrically fixed to the lower surface of the top plate, with the output end of each cylinder penetrating the top plate and fixed with a pressure claw, the pressure claw having a magnetic component fixed on it; a limiting plate detachably mounted on the upper surface of the top plate; a pressing assembly slidably mounted on the limiting plate; and a bipolar plate, with positioning posts at its four corners mounted on the upper surface of the top plate. The positioning posts are fixed to the bipolar plate by electromagnets fixed to the lower surface of the top plate. The positioning posts and electromagnets can position and press the four corners of the bipolar plate. During welding, the pressing assembly moves with the welding head, preventing minor deformation at the welding position and improving the sealing performance of the weld.

[0004] When performing seamless welding, the displacement of the components is often constrained to the maximum extent by fully clamping the frame. Full clamping can ensure positioning accuracy and weld consistency, but improper use can cause high residual stress, cracks, deformation concentration and assembly stress. Summary of the Invention

[0005] In view of this, the present application aims to provide a passive door and window frame welding device to regulate the stress of seamless welding of the frame in a controllable clamping state.

[0006] To achieve the above objectives, the first aspect of this application provides: a passive door and window frame welding device, comprising: A welding table, forming a working surface with a frame for placement; A welding unit connected to the welding table, the welding unit having a welding torch positioned toward the working surface; A plurality of clamping units are used to clamp the frame on which the workbench is placed. Each clamping unit includes at least a first clamping member and a second clamping member, and the first clamping member and the second clamping member are at least in contact with one side of the frame. The first clamping member and the second clamping member are arranged at least along a first direction, and the first clamping member and the second clamping member in the same clamping unit work in a mutually exclusive manner during the clamping operation.

[0007] In some embodiments, the clamping unit has a telescopic portion for controlling the clamping working height of the first clamping member and the second clamping member, and the first clamping member and the second clamping member can be folded and fit against two adjacent surfaces of the frame when not at the lowest working height.

[0008] In some embodiments, the clamping unit is provided with a first mounting base and a second mounting base. The first clamping member and the second clamping member are misaligned and installed inside the first mounting base and the second mounting base. A welding gap is formed at the fold of the first mounting base and the second mounting base so that the welding gun can perform frame welding through the welding gap. A connecting part is provided at the weld seam, and the connecting part switches the connection position when the welding gun passes through the weld seam.

[0009] In some embodiments, the connecting part includes a tenon joint, a guide rod, a driving member, and a magnetic unit. The guide rod is connected to the driving member to drive the guide rod to rotate along a first axis. The driving member is provided with a meshing wheel that meshes with the guide rod. The rotation of the meshing wheel causes the first mounting seat or the second mounting seat to fold through the guide rod. When the first mounting base and the second mounting base are in the unfolded state, they are in the same plane as the contact surface of the frame. When the first mounting base and the second mounting base are in the folded state, they are in contact with two adjacent surfaces of the frame.

[0010] In some embodiments, the tenon joint includes a first tenon and a second tenon, the first tenon being inserted into the second tenon, the first tenon having a tenon head, and the second tenon having at least a first mortise and a second mortise. When the first mounting base and the second mounting base are in the unfolded state, the tenon is inserted into the first mortise hole; when the first mounting base and the second mounting base are in the folded state, the tenon is inserted into the second mortise hole. The magnetic units are respectively disposed in the first mounting base and the second mounting base and control the extension and retraction of the first tenon and the second tenon.

[0011] The connecting section has two functional parts: rigid positioning / locking and folding drive / angle control. The tenon joint consists of a first tenon and a second tenon. When unfolded, the tenon is inserted into the first tenon hole to achieve rigid locking; when folded, it is inserted into the second or third tenon hole to achieve positioning at different folding angles. To achieve rapid electronic control switching, the tenon works with an electromagnetic component to control its extension and locking: one side of the electromagnetic plate is fixed in the mounting base, and the other side is connected with the tenon. When energized, it engages to lock; when de-energized or subjected to reverse current, it releases.

[0012] In some embodiments, the first clamping member includes a first force-applying part, a first driving part, and a first connecting part, wherein the first connecting part connects the first driving part and the first force-applying part, so that the first driving part drives the first force-applying part to change the clamping force through the first connecting part.

[0013] In some embodiments, the first force-applying portion extends at least partially into the first mounting base or the second mounting base, the first connecting portion is disposed within the first mounting base or the second mounting base, and the first force-applying portion is capable of extending and retracting in the clamping direction.

[0014] The clamping unit is equipped with two types of clamping elements: rigid clamping elements are used for critical positioning and finishing joints to ensure geometric accuracy; flexible clamping elements are used for thin-walled sections or high heat input sections to release thermal stress.

[0015] The switching is determined by the controller based on the welding segment type and real-time sensing: before welding, the clamping mode is selected based on the welding process table; in flexible mode, the system maintains the target contact force with a force closed loop, and in rigid mode, it maintains the positioning accuracy with a displacement / position closed loop.

[0016] To avoid instantaneous shock during switching, a gradual change curve is used during the switching process, and short-term force / displacement monitoring is performed before and after switching to confirm stability. The elastic parameters of the flexible clamp, such as stiffness and thickness, should be matched with the welding heat input curve to control the displacement caused by thermal expansion within an acceptable range.

[0017] In some embodiments, the second force-applying part includes a second force-applying part, a second driving part, a second connecting part, and a pressure sensor. The second connecting part is connected to the pressure sensor and extends into the second force-applying part, and the second driving part squeezes the second force-applying part.

[0018] In some embodiments, the second force-applying part is an elastic structure, so that the second driving part changes the contact elasticity between the second force-applying part and the frame after squeezing the second force-applying part; The pressure sensor is installed in the first mounting base and the second mounting base, and the second connecting part array is disposed between the second connecting part and the pressure sensor.

[0019] In some embodiments, the second driving part is configured to be partially connected to the second force-applying part, and the second driving part and the second connecting part are correspondingly arranged.

[0020] The first clamping element is made of rigid material and has no elasticity. After clamping the frame, it can keep the frame in a fully clamped state. The second clamping element is made of elastic material. When clamping the frame, the frame can undergo a certain amount of deformation under the stress generated by welding.

[0021] To reduce the risk of residual stress, cracks, and deformation, the welding sequence should follow the principles of heat balance and constraint release: first weld the key positioning points to establish a benchmark, and then use symmetrical or segmented interval welding to disperse the heat input; for thin-walled sections or high heat input sections, use flexible clamping and reduce the welding line speed or use intermittent welding to reduce instantaneous heat input.

[0022] The controller dynamically adjusts the welding sequence based on force / displacement sensor data: if local displacement or force abnormalities are detected, the current segment is paused and switched to the corresponding segment for compensatory welding or cooling. During welding, passive heat sinks or gas cooling channels are integrated into the clamping unit or mounting base to accelerate local cooling and reduce heat accumulation.

[0023] This application achieves dynamic coordination between clamping and welding pathways through a retractable and foldable clamping unit, a switchable connecting part, and a pressure-sensing-based force closed-loop control, thereby significantly improving weld consistency, reducing rework, and increasing automation capacity and production cycle time.

[0024] In high heat input or thin-walled sections, flexible clamping combined with a pressure sensor array is used. The system monitors the contact force distribution in real time and automatically adjusts the compression of the elastomer, so that the workpiece produces controlled elastic deformation when heated, avoiding stress concentration caused by rigid constraints, thereby effectively reducing the crack incidence and post-weld deformation.

[0025] The key positioning points and the finishing joints are rigidly clamped and linked with the position encoder. The rigid clamping and flexible clamping are automatically switched according to the welding section and a gradual switching curve is used to ensure the geometric accuracy of the reference positioning and the repeatability of the weld, reducing the workload of subsequent assembly and adjustment.

[0026] Modular mechanical design, redundant interlocks, and fault self-diagnosis make equipment maintenance more predictable: key components are easy to replace, sensors and electromagnetic components have shielding and protection measures, and the controller records action logs and supports remote diagnostics, thereby shortening maintenance time, increasing uptime, and reducing long-term operation and maintenance costs.

[0027] Other features and advantages of this application will be set forth in the following description, and in part will be apparent from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the welding apparatus of this application; Figure 2 This is a schematic diagram of the clamping unit for the dismantling portion of this application; Figure 3 This is a side view of this application; Figure 4 This is a schematic diagram of the clamping unit in this application; Figure 5 This is a schematic diagram of the first mounting base and the second mounting base of this application; Figure 6 This is a schematic diagram of the first and second mounting bases in their folded states according to this application. Figure 7 This is a schematic diagram of the driving component of this application; Figure 8 This is a plan view of the tenon joint mounting base location in this application; Figure 9 This is a schematic diagram of the tenon joint in this application; Figure 10 This is a schematic diagram of the first force-applying part and the second force-applying part of this application; Figure 11 This is a schematic diagram of the first mounting base of this application; Figure 12 This is a schematic diagram of the second force-applying part of this application; Figure 13 This is a schematic diagram of the second drive unit of this application.

[0029] In the diagram: 100 welding table, 200 working surface, 300 welding unit, 400 welding torch, 500 clamping unit; 51 First clamping member, 52 Second clamping member, 53 First mounting base, 54 Second mounting base, 55 Connecting member, 56 Telescopic part, L Welding gap; 551 Tenon joint, 552 Guide rod, 553 Drive component, 554 Magnetic unit; 10 First tenon, 11 Second tenon, 12 Tenon head, 13 First mortise, 14 Second mortise; 510 First force-applying part, 511 First driving part, 512 First connecting part; 520 Second force application part, 521 Second drive part, 522 Second connection part, 523 Pressure sensor. Detailed Implementation

[0030] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion.

[0032] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0035] In related technologies, passive door and window frame welding typically employs seamless welding with added thermal break design to effectively block external and internal temperatures, preventing high outdoor temperatures from entering the room and maintaining a cool indoor environment. Welding is performed by using a controllable welding torch 400, which clamps the frame.

[0036] When performing seamless welding of the frame, the frame is fully clamped to constrain the displacement of the components to the maximum extent. Full clamping can ensure positioning accuracy and weld consistency, but improper use can cause high residual stress, cracks, deformation concentration and assembly stress.

[0037] Based on the above, this application provides a passive door and window frame welding device, see reference. Figure 1-3 As shown, the welding device includes a welding table 100, a welding unit 300, and several clamping units 500. The welding table 100 is provided with a working surface 200 for placing the frame to be welded. Several clamping units 500 are provided on the outside of the frame to clamp the frame. The welding unit 300 is provided with a welding gun 400 facing the working surface 200 so that the welding gun 400 can perform welding along the splicing seam of the frame.

[0038] The welding unit 300 is synchronously equipped with a driver that can drive the welding torch 400 to move along the X, Y, and Z axes. Under the drive of the driver, the welding torch 400 can perform welding at multiple positions. Furthermore, a servo motor is installed at the welding torch 400 to drive the welding torch 400 to swing, so as to change the welding angle formed by the welding torch 400 and the working surface 200.

[0039] In some embodiments, a telescopic portion 56 is provided at the bottom of the clamping unit 500 to control the height of the clamping unit 500. (See reference...) Figure 4 As shown, during welding, the bottom wall of the frame is in contact with the working surface 200, and the height of the clamping unit 500 can change the working height to achieve clamping of the frame at different positions.

[0040] Furthermore, to improve the clamping stability of the clamping unit 500 on the frame, the clamping unit 500 includes at least a first clamping member 51 and a second clamping member 52, see reference. Figure 5-6 As shown, the first clamping member 51 and the second clamping member 52 are at least in contact with one side of the frame, and the clamping unit 500 is foldable. When the clamping unit 500 is at a non-minimum working height, the first clamping member 51 and the second clamping member 52 can be folded to change shape.

[0041] The clamping unit 500 is equipped with two types of clamping elements: rigid clamping elements are used for critical positioning and finishing joints to ensure geometric accuracy; flexible clamping elements are used for thin-walled sections or high heat input sections to release thermal stress.

[0042] The switching is determined by the controller based on the welding segment type and real-time sensing: before welding, the clamping mode is selected based on the welding process table; in flexible mode, the system maintains the target contact force with a force closed loop, and in rigid mode, it maintains the positioning accuracy with a displacement / position closed loop.

[0043] To avoid instantaneous shock during switching, a gradual change curve is used during the switching process, and short-term force / displacement monitoring is performed before and after switching to confirm stability. The elastic parameters of the flexible clamp, such as stiffness and thickness, should be matched with the welding heat input curve to control the displacement caused by thermal expansion within an acceptable range.

[0044] When the first clamping member 51 and the second clamping member 52 are in the unfolded state, they are arranged along the first direction. The clamping states of the first clamping member 51 and the second clamping member 52 on the frame are different. Therefore, when clamping the frame, the first clamping member 51 and the second clamping member 52 do not work at the same time. That is, the first clamping member 51 and the second clamping member 52 work in a mutually exclusive manner. When the first clamping member 51 clamps the frame, the second clamping member 52 is released from the frame, and when the second clamping member 52 clamps the frame, the first clamping member 51 is released from the frame.

[0045] It should be noted that in this embodiment, the clamping states of the first clamping member 51 and the second clamping member 52 are different, i.e., one is a flexible clamp and the other is a rigid clamp. When welding the frame at different positions, the flexible clamp and the rigid clamp switch with each other to ensure clamping stability while reducing stress. For example, rigid clamping is used to ensure geometric accuracy for critical positioning and finishing joints of the frame, while flexible clamping is used to release thermal stress in thin-walled or high-heat-input sections. Furthermore, the use of force / displacement sensors and welding sequence control can significantly reduce the risk of cracking and deformation.

[0046] In some embodiments, the clamping unit 500 is provided with a first mounting base 53 and a second mounting base 54, see reference. Figure 5-6 As shown, the first mounting base 53 and the second mounting base 54 are folded at their contact positions. After folding, a welding gap L is formed between the first mounting base 53 and the second mounting base 54, allowing the welding torch 400 to complete welding at the welding gap L. This avoids the problem of the welding gap L being interrupted when clamping at least two sides of the frame. The first clamping member 51 and the second clamping member 52 are installed in a staggered manner inside the first mounting base 53 and the second mounting base 54. That is, the first clamping member 51 and the second clamping member 52 are respectively set at the corresponding folding positions of the first mounting base 53 and the second mounting base 54. In this way, the stability of multi-point clamping can be ensured when clamping the frame.

[0047] A connecting part is provided at the welding gap L. The connecting part is connected to the first mounting base 53 and the second mounting base 54 at multiple connection positions. When the welding torch 400 performs welding through the welding gap L, the connecting part switches the connection position to avoid interference with the welding path.

[0048] In some embodiments, the connection portion consists of two parts: a first part maintains the stability of the first mounting base 53 and the second mounting base 54 when they are folded and unfolded; and a second part controls the switching between the folded and unfolded states of the first mounting base 53 and the second mounting base 54.

[0049] The first part is configured to fit the tenon joint 551 with the magnetic unit 554, see reference. Figure 8-9As shown, the tenon joint 551 has a first tenon 10 inserted into the first mounting base 53 and a second tenon 11 inserted into the second mounting base 54. The first tenon 10 forms a tenon head 12 at the tenon joint, and the second tenon 11 forms at least a first mortise 13 and a second mortise 14 at the tenon joint. When the first mounting base 53 and the second mounting base 54 are unfolded, the tenon head 12 is inserted into the first mortise 13; when the first mounting base 53 and the second mounting base 54 are folded, the tenon head 12 is inserted into the second mortise 14.

[0050] The electromagnetic component is equipped with two corresponding electromagnetic plates. One electromagnetic plate is connected to a section of the first tenon 10 or the second tenon 11 inserted into the first mounting base 53 and the second mounting base 54. The other electromagnetic plate is fixed in the first mounting base 53 or the second mounting base 54. The two electromagnetic plates cooperate to control the extension and retraction of the first tenon 10 and the second tenon 11 and the tenon joint.

[0051] It should be noted that the tenon 12 and the first mortise 13 or the second mortise 14 cooperate to position the folding angle of the first mounting base 53 and the second mounting base 54. In the unfolded state, the first mounting base 53 and the second mounting base 54 are on the same plane. In the folded state, the planes of the first mounting base 53 and the second mounting base 54 are perpendicular to each other. However, this application does not limit the folding angle of the first mounting base 53 and the second mounting base 54. For example, a third mortise is provided between the first mortise 13 and the second mortise 14. After the third mortise engages with the tenon 12, it restricts the second mounting base 54 to a 45° swing position.

[0052] The connecting part has two functions: rigid positioning / locking and folding drive / angle control. The tenon joint 551 consists of a first tenon 10 and a second tenon 11. When unfolded, the tenon 12 is inserted into the first mortise 13 to achieve rigid locking; when folded, it is inserted into the second or third mortise 14 to achieve positioning at different folding angles. To achieve rapid electronic switching, the tenon and the electromagnetic component control the extension and locking of the tenon: one side of the electromagnetic plate is fixed in the mounting base, and the other side is connected with the tenon. When energized, they are attracted to lock, and when de-energized or a reverse current is applied, they are released.

[0053] The second part is configured to facilitate the interaction between the drive component 553 and the guide rod 552. (See attached document.) Figure 7 As shown, the guide rod 552 is arranged in an arc shape, and one end is fixed to the outside of the second mounting base 54. The driving component 553 cooperates with the guide rod 552 to control the position of the guide rod 552, thereby controlling the swing angle of the second mounting base 54.

[0054] The guide rod 552 has teeth on its inner side, and the drive component 553 is configured to cooperate with the drive motor and the gear. The gear meshes with the teeth, and the rotation of the drive motor controls the guide rod 552 to push the second mounting base 54 to swing.

[0055] It should be noted that since the welding torch 400 oscillates under the control of the servo motor, and the guide rod 552 is relatively far from the welding position, the welding of the area blocked by the guide rod 552 is completed by the oscillation of the welding torch 400. The fixation of the guide rod 552 to the second mounting base 54, along with the tenon joint 551, further enhances the stability of the second mounting base 54. Furthermore, the connection between the guide rod 552 and the second mounting base 54 is achieved through magnetic attraction. During the welding process, the guide rod 552 can detach from the second mounting base 54 at any time, thus avoiding contact with the welding torch 400.

[0056] In some embodiments, the first clamping member 51 includes a first force-applying part 510, a first driving part 511, and a first connecting part 512, see reference. Figure 10 As shown, a portion of the first force-applying part 510 extends into the first mounting base 53 or the second mounting base 54, the first connecting part 512 is connected to the first force-applying part 510, the first driving member 553 is detachably mounted on the outside of the first mounting base 53 or the second mounting base 54, and the driving end of the first driving member 553 extends into the first mounting base 53 or the second mounting base 54 and is connected to the first connecting part 512.

[0057] The first force-applying part 510 can extend and retract along the clamping direction of the first clamping member 51 on the frame to achieve clamping of the frame.

[0058] Thus, the first drive unit 511, in cooperation with the first connecting unit 512, controls the extension and retraction length of the first force-applying unit 510. The drive end of the first drive unit 511 is equipped with a threaded rod, and the first connecting unit 512 is set as a threaded tube. The threaded rod and the threaded tube cooperate to change the extension and retraction state of the first force-applying unit 510 under the drive of the drive end.

[0059] In some embodiments, the second clamping member 52 includes a second force-applying part 520, a second driving part 521, a second connecting part 522, and a pressure sensor 523. (See also...) Figure 11-13 As shown, the second connecting part 522 is connected to the pressure sensor 523 and extends into the second force-applying part 520. The second force-applying part 520 is elastically configured. The second driving part 521 changes the elasticity of the second force-applying part 520 by squeezing the second force-applying part 520. The second force-applying part 520 is made of rubber.

[0060] The pressure sensor 523 array is set in the first mounting base 53 or the second mounting base 54 to form a collection matrix, which realizes multi-point pressure detection of the clamping surface. When the second clamping member 52 clamps the frame, the second force application part 520 is squeezed. Based on the feedback data of the pressure sensor 523, it is determined whether the frame is deformed during the welding process. The elastic force of the second force application part 520 is adjusted by the second driving part 521 according to the pressure feedback data.

[0061] Furthermore, during the welding process, if the force decreases due to the heat effect of welding, the controller can fine-tune the second drive unit 521 according to the preset compensation curve to maintain the target elastic force. If a certain sensing point continues to deviate from the threshold or the sensor fails, an alarm is triggered and a safety reset process is entered to avoid continuing welding under abnormal conditions.

[0062] It should be noted that the second drive unit 521 is configured with two corresponding electromagnetic rings, one of which is embedded in the second force application unit 520, and the other electromagnetic ring is installed inside the first mounting base 53 or the second mounting base 54.

[0063] Understandably, the first clamping member 51 is made of rigid material and has no elasticity. After clamping the frame, it can keep the frame in a fully clamped state. The second clamping member 52 is made of elastic material. When clamping the frame, the frame can undergo a certain amount of deformation under the stress generated by welding.

[0064] To reduce the risk of residual stress, cracks, and deformation, the welding sequence should follow the principles of heat balance and constraint release: first weld the key positioning points to establish a benchmark, and then use symmetrical or segmented interval welding to disperse the heat input; for thin-walled sections or high heat input sections, use flexible clamping and reduce the welding line speed or use intermittent welding to reduce instantaneous heat input.

[0065] The controller dynamically adjusts the welding sequence based on force / displacement sensor data: if local displacement or force abnormalities are detected, the current segment is paused and switched to the corresponding segment for compensatory welding or cooling. During welding, passive heat sinks or gas cooling channels are integrated into the clamping unit 500 or mounting base to accelerate local cooling and reduce heat accumulation.

[0066] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein.

Claims

1. A passive door and window frame welding device, characterized in that, include: A welding table (100) forms a working surface (200) on which a frame is placed. A welding unit (300) is connected to the welding table (100), and the welding unit (300) has a welding torch (400) disposed facing the working surface (200). A plurality of clamping units (500) are used to clamp the frame on which the workbench is placed. Each clamping unit (500) includes at least a first clamping member (51) and a second clamping member (52), and the first clamping member (51) and the second clamping member (52) are at least in contact with one side of the frame. The first clamping member (51) and the second clamping member (52) are arranged at least along a first direction, and the first clamping member (51) and the second clamping member (52) in the same clamping unit (500) work in a mutually exclusive manner during the clamping operation.

2. The passive door and window frame welding device according to claim 1, characterized in that, The clamping unit (500) has a telescopic part (56) for controlling the clamping working height of the first clamping member (51) and the second clamping member (52), and the first clamping member (51) and the second clamping member (52) can be folded and fit against two adjacent sides of the frame when the working height is not the lowest.

3. The passive door and window frame welding device according to claim 2, characterized in that, The clamping unit (500) is provided with a first mounting base (53) and a second mounting base (54). The first clamping member (51) and the second clamping member (52) are installed in a staggered manner inside the first mounting base (53) and the second mounting base (54). The folded part of the first mounting base (53) and the second mounting base (54) forms a welding gap (L) so that the welding torch (400) can perform frame welding through the welding gap (L). A connecting part is provided at the welding gap (L), and the connecting part switches the connection position when the welding torch (400) welds through the welding gap (L).

4. A passive door and window frame welding device according to claim 3, characterized in that, The connecting part includes a tenon joint (551), a guide rod (552), a driving member (553), and a magnetic unit (554). The guide rod (552) is connected to the driving member (553) to drive the guide rod (552) to rotate along a first axis. The driving member (553) is provided with a meshing wheel that meshes with the guide rod (552). The rotation of the meshing wheel causes the first mounting seat (53) or the second mounting seat (54) to fold through the guide rod (552). When the first mounting base (53) and the second mounting base (54) are in the unfolded state, they are in the same plane as the contact surface of the frame. When the first mounting base (53) and the second mounting base (54) are in the folded state, they are in contact with two adjacent surfaces of the frame.

5. A passive door and window frame welding device according to claim 4, characterized in that, The tenon joint (551) includes a first tenon (10) and a second tenon (11), the first tenon (10) being inserted into the second tenon (11), the first tenon (10) having a tenon (12), and the second tenon (11) having at least a first mortise (13) and a second mortise (14). When the first mounting base (53) and the second mounting base (54) are in the unfolded state, the tenon (12) is inserted into the first mortise (13); when the first mounting base (53) and the second mounting base (54) are in the folded state, the tenon (12) is inserted into the second mortise (14). The magnetic unit (554) is respectively disposed in the first mounting base (53) and the second mounting base (54) and controls the extension and retraction of the first tenon (10) and the second tenon (11).

6. A passive door and window frame welding device according to claim 3, characterized in that, The first clamping member (51) includes a first force-applying part (510), a first driving part (511) and a first connecting part (512). The first connecting part (512) connects the first driving part (511) and the first force-applying part (510) so that the first driving part (511) drives the first force-applying part (510) to change the clamping force through the first connecting part (512).

7. A passive door and window frame welding device according to claim 6, characterized in that, The first force-applying part (510) extends at least partially into the first mounting base (53) or the second mounting base (54), the first connecting part (512) is disposed in the first mounting base (53) or the second mounting base (54), and the first force-applying part (510) is capable of telescoping along the clamping direction.

8. A passive door and window frame welding device according to claim 3, characterized in that, The second force-applying part (520) includes a second force-applying part (520), a second drive part (521), a second connecting part (522) and a pressure sensor (523). The second connecting part (522) is connected to the pressure sensor (523) and extends into the second force-applying part (520). The second drive part (521) squeezes the second force-applying part (520).

9. A passive door and window frame welding device according to claim 8, characterized in that, The second force-applying part (520) is an elastic structure, so that the second drive part (521) changes the contact elasticity between the second force-applying part (520) and the frame after squeezing the second force-applying part (520); The pressure sensor (523) is installed in the first mounting base (53) and the second mounting base (54), and the second connecting part (522) array is arranged between the second connecting part (522) and the pressure sensor (523).

10. A passive door and window frame welding device according to claim 9, characterized in that, The second drive unit (521) is configured to be partially connected to the second force application unit (520), and the second drive unit (521) and the second connection unit (522) are respectively provided.

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