A self-centering positioning device for door and window corner assembly machines and its multi-axis synchronous corner assembly process

Abstract

This application relates to a self-centering positioning device for a door and window corner assembly machine and its multi-axis synchronous corner assembly process, belonging to the technical field of door and window corner assembly machines. The self-centering positioning device for the door and window corner assembly machine includes a positioning mechanism and a machine body. The positioning mechanism includes two positioning frames, each of which is slidably connected to the machine body and has the same sliding direction. The positioning mechanism also includes two elastic reset members, which are correspondingly arranged with the positioning frames. Each elastic reset member is used to use its own elastic force to abut against the corresponding positioning frame and the door / window profile. This application provides a convenient positioning effect for door and window profiles of different specifications and sizes.

Description

Technical Field

[0001] This application relates to the field of door and window corner assembly machine technology, and in particular to a self-centering positioning device for a door and window corner assembly machine and its multi-axis synchronous corner assembly process. Background Technology

[0002] As a specialized piece of equipment for door and window production, the corner assembly machine uses the impact pressure generated by the hydraulic system to push a specially designed corner assembly knife, which tightly rivets the door and window profiles to the internal corner brackets to form a solid 90-degree angle, playing an important role in the assembly of doors and windows.

[0003] A positioning device for a door and window corner assembly machine exists in the prior art. It includes a positioning mechanism comprising a central frame, two positioning frames, and several fixing bolts. The central frame is mounted on the machine body, and the two positioning frames are located on opposite sides of the central frame and are slidably connected to the machine body. Two door and window profiles to be installed are positioned between the two positioning frames, abutting against the central frame and their corresponding positioning frames to position the profiles. Several fixing bolts are respectively mounted on the two positioning frames to fix them to the machine body. In use, the door and window profiles to be assembled are placed between the positioning frames and the central frame, abutting against the frames and forming an L-shape, thereby achieving the positioning of the door and window profiles.

[0004] Regarding the aforementioned technologies, since the positioning frame in the existing technology is fixed to the machine body with bolts, when it is necessary to assemble door and window profiles of different sizes and specifications, relevant personnel need to manually loosen the fixing bolts between the positioning frame and the machine body in order to drive the positioning frame to slide and adjust its position. After adjustment, the positioning frame needs to be fixed again, which increases the workload of relevant personnel and reduces the efficiency of corner assembly. Therefore, it needs to be improved. Summary of the Invention

[0005] To facilitate the adjustment of the position of the positioning frame, this application provides a self-centering positioning device for a door and window corner assembly machine and its multi-axis synchronous corner assembly process.

[0006] Firstly, this application provides a self-centering positioning device for a door and window corner assembly machine, which adopts the following technical solution: A self-centering positioning device for a door and window corner assembly machine includes a positioning mechanism and a machine body. The positioning mechanism includes two positioning frames, each of which is slidably connected to the machine body and is arranged in the same sliding direction. The positioning mechanism also includes two elastic reset members, which are arranged corresponding to the positioning frames. Each elastic reset member is used to use its own elastic force to abut against the corresponding positioning frame and the door and window profile.

[0007] By adopting the above technical solution and setting the positioning mechanism, after the door and window profiles are placed on the machine body, the positioning frame can automatically abut against the side wall of the door and window profiles under the elastic force of the elastic reset member, thereby fixing and positioning the door and window profiles by clamping. At the same time, the setting of the elastic reset member enables the positioning frame in this application to automatically clamp and position door and window profiles of different sizes and specifications under the action of the elastic reset member. Therefore, it is not necessary for relevant personnel to manually adjust the position of the positioning frame, and it can adapt to different sizes and specifications. This makes it convenient for the positioning frame to position door and window profiles of different sizes and specifications, effectively facilitating the operation of relevant personnel, reducing workload and improving the efficiency of corner assembly. At the same time, it can also automatically compensate for the tolerance of the profile cross-section size, thereby reducing the probability of corner misalignment.

[0008] Preferably, the body is further provided with a pull-out mechanism, which includes a pull-out frame and a pull-out assembly. The number of pull-out frames is set to two, and they are correspondingly arranged with the positioning frames. One end of each pull-out frame is located between the two positioning frames. Each pull-out frame is slidably connected to the body, and each positioning frame is located on the sliding path at the end of the corresponding pull-out frame. The pull-out assembly is used to drive each pull-out frame to slide.

[0009] By adopting the above technical solution and setting the pull-out mechanism, when it is necessary to position the door and window profiles, relevant personnel can control the pull-out component to make the pull-out frame slide. After the pull-out frame and the positioning frame come into contact, the positioning frame can be pushed to slide by the contact, thereby realizing the separation between the two positioning frames. This effectively replaces manual operation and facilitates the operation of relevant personnel.

[0010] Preferably, the positioning mechanism further includes a centering frame, which is located on the side of the door and window profile away from the positioning frame. The centering frame is slidably connected to the body and its sliding direction is perpendicular to the sliding direction of the positioning frame, so as to abut against the door and window profile after sliding. The pull-out component is also used to drive the centering frame to slide.

[0011] By adopting the above technical solution and setting up the centering frame, relevant personnel can pull out the component to drive the centering frame to slide, thereby changing the distance between the centering frame and the positioning frame. This allows it to adapt to door and window profiles of different sizes and specifications, ensuring the positioning effect of door and window profiles of different sizes and specifications. At the same time, the presence of the centering frame can also ensure the accuracy of center positioning of door and window profiles.

[0012] Preferably, the pull-out assembly includes a sliding frame, a transmission frame, and a sliding component. The sliding frame is slidably connected to the body, and the sliding direction is the same as the sliding direction of the centering frame. The sliding component is used to drive the sliding frame to slide. The number of transmission frames is set to several, and they are respectively arranged on two pull-out frames. One end of each transmission frame is rotatably connected to the corresponding pull-out frame, and the other end is rotatably connected to the sliding frame.

[0013] By adopting the above technical solution and specifically configuring the pull-out component, the sliding component can drive the sliding frame to slide, and the sliding frame can drive each pull-out frame to slide through several transmission frames, thereby realizing the driving of each pull-out frame. Thus, it is possible to drive each pull-out frame without setting up several driving components, which effectively facilitates the operation of relevant personnel.

[0014] Preferably, the sliding frame is provided with several fixing slots, and the centering frame is provided with a fixing mechanism. The fixing mechanism includes an insertion frame and a fixing component. The insertion frame is slidably connected to the centering frame, and one end extends out of the centering frame and is inserted into the corresponding fixing slot. The fixing component is used to drive the insertion frame to slide.

[0015] By adopting the above technical solution, the fixing mechanism is designed so that the fixing components can drive the insertion frame to slide, thereby inserting the insertion frame into the fixing groove. This fixes the centering frame and the sliding frame, allowing the centering frame to move together with the sliding frame. This facilitates the abutment of the side of the door and window profile away from the positioning frame, and also effectively facilitates the placement of the door and window profile. Furthermore, after releasing the fixing between the centering frame and the sliding frame, personnel can change the insertion position of the insertion frame to change the final position of the centering frame after it slides together with the sliding frame, adapting to door and window profiles of different sizes and specifications.

[0016] Preferably, the fixing component includes a drive frame, a transmission rod, and a linkage. The drive frame is slidably connected to the centering frame. One end of the transmission rod is rotatably connected to the drive frame, and the other end is rotatably connected to the insertion frame. The pull-out frame drives the drive frame to slide through the linkage.

[0017] By adopting the above technical solution and specifically configuring the fixing components, when the pull-out frame continues to slide after separating from the corresponding positioning frame, it can drive the moving frame to slide through the linkage, thereby causing the moving frame to drive the insertion frame to slide through the transmission rod, thus realizing the driving of the insertion frame. This effectively saves the driving components required to drive the insertion frame to slide, and allows relevant personnel to only control the sliding amount of the sliding frame to achieve dual driving of the positioning frame and the insertion frame, effectively facilitating the operation of relevant personnel.

[0018] Preferably, the linkage includes a linkage frame located between the two positioning frames and on the sliding path of one of the pull-out frames. The linkage frame is also provided with an adaptation groove, the extension direction of which is parallel to the sliding direction of the centering frame. One end of the driving frame extends into the adaptation groove and abuts against the inner wall of the adaptation groove.

[0019] By adopting the above technical solution, the linkage frame is designed so that when one of its pull-out frames continues to slide after separating from the corresponding positioning frame, it can abut against the linkage frame, pushing the linkage frame to slide. This causes the inner wall of the adaptation groove on the linkage frame to abut against the driving frame, driving the driving frame to slide together, thereby realizing the linkage drive of the driving frame. Moreover, the existence of the adaptation groove can effectively ensure that the centering frame slides smoothly along with the sliding frame.

[0020] Preferably, the top of each positioning bracket on the side closest to the door / window profile is tilted 15 degrees away from the side of the door / window profile.

[0021] By adopting the above technical solution and specifically setting the positioning frame, the inclined side of the positioning frame can abut against the end of the door and window profile, thereby adapting to the tolerances during the manufacturing of the end of the door and window profile and effectively reducing the corner flatness error.

[0022] Preferably, the elastic reset member is configured as a disc spring assembly, one end of which abuts against the corresponding positioning frame, and the other end abuts against the machine body.

[0023] By adopting the above technical solution, the disc spring assembly has a higher energy density per unit volume compared to ordinary compression springs. It can effectively absorb impact and dissipate energy through friction between the discs, thereby ensuring buffering performance and buffering between the positioning frame and the door and window profiles. It is also more convenient for maintenance and replacement.

[0024] On the other hand, this application also provides a multi-axis synchronous corner assembly process for a self-centering positioning device used in door and window corner assembly machines, comprising the following steps: Profile placement: Separate the two positioning frames, then place the door and window profiles onto the machine body and position them using the positioning pins on the door and window corner assembly machine; Profile centering and positioning: The restriction on the positioning frame is removed, so that both positioning frames slide under the elastic force of the elastic reset member and abut against the door and window profile, thereby centering and positioning the door and window profile; Profile punching and riveting: The punching and riveting device on the door and window corner assembly machine punches and rivets the door and window profiles in sequence simultaneously; Profile ejection: The pneumatic ejection device on the door and window corner assembly machine ejects the riveted door and window profiles.

[0025] In summary, this application includes at least one of the following beneficial technical effects: The positioning mechanism allows the positioning frame to automatically abut against the side wall of the door and window profile after it is placed on the machine body, under the elastic force of the elastic reset component. This clamps and positions the door and window profile. The elastic reset component also allows the positioning frame to automatically clamp and position door and window profiles of different sizes and specifications, eliminating the need for manual adjustment. This adapts to different sizes and specifications, facilitating the positioning of door and window profiles of various dimensions. This significantly simplifies operation, reduces workload, and improves corner assembly efficiency. Furthermore, it automatically compensates for profile cross-sectional dimensional tolerances, reducing the likelihood of corner misalignment. The pull-out mechanism allows personnel to control the pull-out components to slide the pull-out bracket when it is necessary to position the door and window profiles. This allows the pull-out bracket to come into contact with the positioning bracket and push the positioning bracket to slide, thereby separating the two positioning brackets. This effectively replaces manual operation and facilitates the operation of relevant personnel. The design of the centering frame and fixing mechanism allows the fixing components to drive the insertion frame to slide, thereby inserting the insertion frame into the fixing slot and fixing the centering frame and the sliding frame together. This allows the centering frame to move together with the sliding frame, facilitating the placement of the door and window profiles away from the positioning frame. It also effectively facilitates the placement of the door and window profiles. Furthermore, after releasing the fixing between the centering frame and the sliding frame, personnel can change the insertion position of the insertion frame to change the final position of the centering frame after it slides together with the sliding frame, adapting to door and window profiles of different sizes and specifications. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the overall self-centering positioning device for door and window corner assembly machine in Embodiment 1 of this application.

[0027] Figure 2 This is a schematic diagram illustrating the structure of the elastic reset member in Embodiment 1 of this application.

[0028] Figure 3 This is a schematic diagram illustrating the pull-out mechanism in Embodiment 2 of this application.

[0029] Figure 4 This is a structural schematic diagram illustrating the fixing mechanism in Embodiment 2 of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Positioning mechanism; 11. Positioning frame; 12. Elastic reset component; 13. Centering frame; 2. Body; 3. Guide rod; 4. Pull-out mechanism; 41. Pull-out frame; 42. Pull-out assembly; 421. Sliding frame; 422. Transmission frame; 423. Sliding component; 5. Fixing groove; 6. Fixing mechanism; 61. Insertion frame; 62. Fixing assembly; 621. Drive frame; 622. Transmission rod; 623. Linkage component; 6231. Linkage frame; 7. Adaptation groove; 8. Return spring. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] Example 1

[0033] Embodiment 1 of this application discloses a self-centering positioning device for a door and window corner assembly machine. (Refer to...) Figure 1 and Figure 2 The self-centering positioning device for a door and window corner assembly machine includes a positioning mechanism 1 and a body 2, with the body 2 mounted on the door and window corner assembly machine. The positioning mechanism 1 includes two positioning frames 11, each mounted on the body 2 of the corner assembly machine, and each positioning frame 11 is slidably connected to the body 2 with the same sliding direction. The positioning mechanism 1 also includes two elastic reset members 12, corresponding to the positioning frames 11. Each elastic reset member 12 uses its own elasticity to abut the corresponding positioning frame 11 against the door and window profile.

[0034] Reference Figure 1 and Figure 2 Each positioning bracket 11 has its top edge near the door / window profile tilted at a 15-degree angle away from the door / window profile. This, combined with the elastic reset member 12, ensures that the corner flatness error is ≤0.2mm, which is better than the industry standard of 0.3mm. In this embodiment, each positioning bracket 11 has a polyurethane anti-slip pad embedded on the side wall near the door / window profile to increase the friction between the positioning bracket 11 and the door / window profile, thereby ensuring the clamping effect.

[0035] Reference Figure 1 and Figure 2 Each positioning frame 11 extends downward into the body 2 at its bottom and is slidably connected to the body 2 via a sliding groove. The sliding directions of the two positioning frames 11 are on the same straight line. A guide rod 3 is also provided inside the body 2. Both ends of the guide rod 3 are fixedly connected to the body 2, and the axial direction is the sliding direction of the positioning frame 11.

[0036] Reference Figure 1 and Figure 2Each positioning frame 11 has its bottom sleeved on the guide rod 3 and is slidably connected to the guide rod 3. Each elastic reset element 12 is a disc spring assembly with an adjustable preload range of 50-200N. Each disc spring assembly is located on the side of the corresponding positioning frame 11 away from the other positioning frame 11, and the disc springs in each disc spring assembly are sleeved on the guide rod 3. The disc spring closest to the corresponding positioning frame 11 abuts against the corresponding positioning frame 11, while the other side abuts against the inner wall of the body 2. This allows the positioning frame 11 to continuously abut against the door and window profile through elasticity, enabling the positioning frame 11 to adapt to and be compatible with various profiles such as aluminum, steel, and plastic, and ensuring a tolerance compensation range of ±1mm. In other embodiments, the spring reset mechanism can also be replaced by a cylinder reset system controlled by a pneumatic proportional valve.

[0037] Reference Figure 1 and Figure 2 The positioning mechanism 1 also includes a centering frame 13, which is located between the two positioning frames 11 and is fixedly installed on the body 2. One end of the centering frame 13 is set at a right angle to abut against the inner side of the right angle of the door and window profile, thereby centering the inner right angle of the door and window profile through abutment.

[0038] Reference Figure 1 and Figure 2 In this embodiment, the window and door corner assembly machine is equipped with a multi-axis synchronous corner assembly mechanism. This mechanism includes a horizontal riveting shaft, a vertical riveting shaft, and an oblique auxiliary shaft. Each shaft has a servo-driven riveting punch at its end, ensuring that the three axes operate synchronously in a preset sequence during corner assembly (oblique shaft pre-pressing → horizontal shaft main riveting → vertical shaft supplementary riveting). The pressure curve is: oblique shaft 10MPa (0.5s) → horizontal shaft 15MPa (1s) → vertical shaft 12MPa (0.8s), thereby doubling the corner assembly efficiency and reducing the single-piece corner assembly time from 60 seconds to 30 seconds. The synchronous control algorithm on the window and door corner assembly machine uses PID closed-loop adjustment to ensure that the displacement error of each axis is ≤0.05mm. In other embodiments, a four-axis synchronous mechanism (adding diagonal oblique shafts) can be used to further enhance corner strength through cross riveting.

[0039] The implementation principle of the self-centering positioning device for a door and window corner assembly machine in Embodiment 1 of this application is as follows: After the door and window profiles are placed on the machine body 2, the positioning frame 11 can automatically abut against the side wall of the door and window profiles under the elastic force of the elastic reset member 12, thereby fixing and positioning the door and window profiles by clamping. At the same time, the setting of the elastic reset member 12 enables the positioning frame 11 in this application to automatically clamp and position door and window profiles of different sizes and specifications under the action of the elastic reset member 12, so that the relevant personnel do not need to manually adjust the position of the positioning frame 11, and can adapt to different sizes and specifications, effectively facilitating the operation of relevant personnel, reducing workload and improving the efficiency of corner assembly, and can also automatically compensate for the tolerance of the profile cross-section size, thereby reducing the probability of corner misalignment.

[0040] Embodiment 1 of this application also provides a multi-axis synchronous corner assembly process for a self-centering positioning device used in a door and window corner assembly machine, comprising the following steps: S1. Profile placement: Separate the two positioning frames 11, then place the door and window profiles onto the machine body 2, and position them using the positioning pins on the door and window corner assembly machine; S2, Profile centering and positioning: Release the restriction on the positioning frame 11, so that both positioning frames 11 slide under the elastic force of the corresponding elastic reset member 12 and abut against the door and window profile, so that the two positioning frames 11 and the centering frame 13 abut against each other to center and position the door and window profile. S3. Profile punching and riveting: The punching and riveting device on the door and window corner assembly machine punches and rivets the door and window profiles in sequence simultaneously. S4. Profile ejection: The pneumatic ejection device on the door and window corner assembly machine ejects the riveted door and window profiles.

[0041] Example 2

[0042] The difference between Embodiment 2 and Embodiment 1 in this application is that: (Refer to...) Figure 3 and Figure 4 The body 2 is also equipped with a pull-out mechanism 4, which includes a pull-out frame 41 and a pull-out assembly 42. There are two pull-out frames 41, which are arranged one-to-one with the positioning frames 11. Each pull-out frame 41 is slidably connected to the body 2 through a slide groove or slide rail, and the sliding direction is the same as the sliding direction of the corresponding positioning frame 11.

[0043] Reference Figure 3 and Figure 4 The two pull-out brackets 41 extend from one end close to the other to the space between the two positioning brackets 11, and their tops extend upwards to abut against the side wall of the corresponding positioning bracket 11. This allows the positioning brackets 11 to slide together when the two pull-out brackets 41 move away from each other, thus causing the two positioning brackets 11 to move away from each other.

[0044] Reference Figure 3 and Figure 4 The pull-out assembly 42 includes a sliding frame 421, a transmission frame 422, and a sliding member 423. The sliding frame 421 is slidably connected to the machine body 2 via a sliding groove or a sliding rail, and the sliding direction is perpendicular to the sliding direction of each positioning frame 11. In this embodiment, the sliding member 423 is configured as an electric push rod, which is fixedly installed inside the machine body 2. The displacement direction of the piston rod is parallel to the sliding direction of the sliding frame 421, and the end of the piston rod is fixedly connected to the sliding frame 421 to drive the sliding frame 421 to slide.

[0045] Reference Figure 3 and Figure 4 In this embodiment of the application, the number of transmission frames 422 is set to two, and they are respectively arranged one-to-one with two pull-out frames 41. One end of each transmission frame 422 is rotatably connected to the corresponding pull-out frame 41 through a pin, and the other end is rotatably connected to the sliding frame 421 through a pin, so that the sliding frame 421 drives the pull-out frame 41 to slide through the transmission frame 422.

[0046] Reference Figure 3 and Figure 4 The bottom of the centering frame 13 extends downward into the body 2 and is slidably connected to the body 2 via a sliding groove, with the sliding direction parallel to the sliding direction of the sliding frame 421. Several fixing slots 5 are also provided through the top wall of the sliding frame 421, and these fixing slots 5 are evenly and equidistantly distributed along the sliding direction of the sliding frame 421. A fixing mechanism 6 is also provided on the centering frame 13. The fixing mechanism 6 includes an insertion frame 61 and a fixing component 62. The fixing component 62 includes a driving frame 621, a transmission rod 622, and a linkage 623. One end of the driving frame 621 is located outside the centering frame 13, and the other end extends into the centering frame 13 and is slidably connected to the centering frame 13 via a sliding groove, with the sliding direction parallel to the sliding direction of the pull-out frame 41.

[0047] Reference Figure 3 and Figure 4 One end of the transmission rod 622 is rotatably connected to the end of the drive frame 621 located inside the centering frame 13 via a pin, and the other end is rotatably connected to the top of the insertion frame 61 via a pin. One end of the insertion frame 61 is located inside the centering frame 13 and is slidably connected to the centering frame 13 via a sliding groove, with the sliding direction being vertical. The other end of the insertion frame 61 extends vertically downwards outside the centering frame 13 and is inserted into the corresponding fixing groove 5, so that the sliding frame 421 is fixed to the centering frame 13, allowing the sliding frame 421 to drive the centering frame 13 to slide together. In this embodiment, guide surfaces are provided on the bottom of both sides of the insertion frame 61 along the sliding direction of the centering frame 13 to ensure the accuracy of the insertion frame 61 being inserted into the fixing groove 5.

[0048] Reference Figure 3 and Figure 4 The linkage component 623 includes a linkage frame 6231, which is located between one of its pull-out frames 41 and sliding frames 421. It is slidably connected to the body 2 via a sliding groove, and its sliding direction is the same as that of the pull-out frame 41, and it is located on the sliding path of the corresponding pull-out frame 41. The top of the linkage frame 6231 is also provided with an adaptation groove 7, which extends parallel to the sliding direction of the sliding frame 421. The end of the linkage frame 621 located outside the centering frame 13 is bent downward and inserted into the adaptation groove 7, and its side wall abuts against the inner side wall of the adaptation groove 7.

[0049] Reference Figure 3 and Figure 4 A reset spring 8 is also provided on the side of the linkage frame 6231 near the sliding frame 421. In this embodiment, the reset spring 8 is a pressure spring, and one end of the pressure spring abuts against the linkage frame 6231, and the other end abuts against the inner wall of the body 2, so as to reset the linkage frame 6231 by its own elastic force.

[0050] Reference Figure 3 and Figure 4 In the initial state, when the door and window profiles are not positioned, the two pull-out brackets 41 are far apart. The top of the pull-out bracket 41 abuts against the side wall of the corresponding positioning bracket 11, thus keeping the two positioning brackets 11 far apart as well. The butterfly spring assembly is compressed. The centering bracket 13 is located on the side of its sliding path away from the positioning bracket 11, and the linkage bracket 6231 is located on the side of its sliding path away from the sliding bracket 421. This places the insertion bracket 61 at the top of its sliding path, fixing the sliding bracket 421 to the centering bracket 13.

[0051] Reference Figure 3 and Figure 4 When the door and window profiles are placed between the positioning frame 11 and the centering frame 13, requiring centering and positioning of the profiles, the sliding component 423 drives the sliding frame 421 to slide, causing the centering frame 13 to slide as well. At this time, the end of the driving frame 621 slides within the adaptation groove 7. During this process, the sliding frame 421, through the transmission frame 422, drives the pull-out frame 41 to move closer together, gradually releasing the restriction on the positioning frame 11. The positioning frame 11 then slides under the elastic force of the disc spring assembly, gradually approaching the door and window profiles. When the positioning frame 11 comes into contact with the door and window profiles, the pull-out frame 41 separates from the positioning frame 11, and the centering frame 13 abuts against the right angle of the door and window profiles, thus achieving positioning of the profiles. At this time, the pull-out frame 41 does not abut against the linkage frame 6231.

[0052] Reference Figure 3 and Figure 4When no more door or window profiles are placed between the positioning frame 11 and the centering frame 13, and the final position of the centering frame 13 after sliding needs to be adjusted, the sliding component 423 drives the sliding frame 421 to slide, causing the pull-out frame 41 to separate from the positioning frame 11 and continue to slide. Subsequently, the pull-out frame 41, closer to the linkage frame 6231, abuts against the linkage frame 6231, thereby pushing the linkage frame 6231 to slide, causing the linkage frame 6231 to drive the drive frame 621 to slide relative to the centering frame 13. During this process, the drive frame 621, through the transmission rod 622, drives the insertion frame 61 to slide upwards, thereby causing the insertion frame 61 to disengage from the fixing slot 5. Afterwards, the sliding component 423 maintains its current state, allowing personnel to slide the centering frame 13, changing the fixing slot 5 where the subsequent insertion frame 61 is inserted, thus changing the fixed position of the centering frame 13.

[0053] The implementation principle of the self-centering and positioning device for a door and window corner assembly machine in Embodiment 2 of this application is as follows: When it is necessary to center and position the door and window profiles, the sliding component 423 drives the sliding frame 421 to slide, thereby causing the sliding frame 421 to slide along with the centering frame 13. At this time, the end of the driving frame 621 slides within the adaptation groove 7. During this process, the sliding frame 421 drives the pull-out frame 41 to move closer to each other through the transmission frame 422, thereby gradually releasing the restriction on the positioning frame 11. The positioning frame 11 slides under the elastic force of the disc spring group, and then gradually approaches the door and window profiles. When the positioning frame 11 abuts against the door and window profiles, the pull-out frame 41 separates from the positioning frame 11, and the centering frame 13 abuts against the right angle of the door and window profiles, thereby achieving the positioning of the door and window profiles.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-centering positioning device for a door and window corner assembly machine, comprising a positioning mechanism (1) and a machine body (2), wherein the positioning mechanism (1) comprises two positioning frames (11), characterized in that: Each of the positioning frames (11) is slidably connected to the body (2) and the sliding direction is the same. The positioning mechanism (1) also includes two elastic reset members (12). The elastic reset members (12) are correspondingly arranged with the positioning frames (11). Each elastic reset member (12) is used to use its own elastic force to allow the corresponding positioning frame (11) to abut against the door and window profile.

2. The self-centering positioning device for a door and window corner assembly machine according to claim 1, characterized in that: The body (2) is also provided with a pull-out mechanism (4), which includes a pull-out frame (41) and a pull-out assembly (42). The number of pull-out frames (41) is set to two, and they are correspondingly arranged with the positioning frames (11). One end of each pull-out frame (41) is located between the two positioning frames (11). Each pull-out frame (41) is slidably connected to the body (2), and each positioning frame (11) is located on the sliding path at the end of the corresponding pull-out frame (41). The pull-out assembly (42) is used to drive each pull-out frame (41) to slide.

3. The self-centering positioning device for a door and window corner assembly machine according to claim 2, characterized in that: The positioning mechanism (1) further includes a centering frame (13), which is located on the side of the door and window profile away from the positioning frame (11). The centering frame (13) is slidably connected to the body (2), and the sliding direction is perpendicular to the sliding direction of the positioning frame (11) so as to abut against the door and window profile after sliding. The pull-out assembly (42) is also used to drive the centering frame (13) to slide.

4. The self-centering positioning device for a door and window corner assembly machine according to claim 3, characterized in that: The pull-out assembly (42) includes a sliding frame (421), a transmission frame (422), and a sliding member (423). The sliding frame (421) is slidably connected to the body (2), and the sliding direction is the same as the sliding direction of the centering frame (13). The sliding member (423) is used to drive the sliding frame (421) to slide. The number of transmission frames (422) is set to several, and they are respectively set on two pull-out frames (41). One end of each transmission frame (422) is rotatably connected to the corresponding pull-out frame (41), and the other end is rotatably connected to the sliding frame (421).

5. A self-centering positioning device for a door and window corner assembly machine according to claim 4, characterized in that: The sliding frame (421) is also provided with several fixing slots (5), and the centering frame (13) is also provided with a fixing mechanism (6). The fixing mechanism (6) includes an insertion frame (61) and a fixing component (62). The insertion frame (61) is slidably connected to the centering frame (13), and one end extends out of the centering frame (13) and is inserted into the corresponding fixing slot (5). The fixing component (62) is used to drive the insertion frame (61) to slide.

6. The self-centering positioning device for a door and window corner assembly machine according to claim 5, characterized in that: The fixing component (62) includes a drive frame (621), a transmission rod (622), and a linkage (623). The drive frame (621) is slidably connected to the centering frame (13). One end of the transmission rod (622) is rotatably connected to the drive frame (621), and the other end is rotatably connected to the insertion frame (61). The pull-out frame (41) drives the drive frame (621) to slide through the linkage (623).

7. The self-centering positioning device for a door and window corner assembly machine according to claim 3, characterized in that: The linkage component (623) includes a linkage frame (6231), which is located between the two positioning frames (11) and on the sliding path of one of the pull-out frames (41). The linkage frame (6231) is also provided with an adaptation groove (7), the extension direction of which is parallel to the sliding direction of the centering frame (13). One end of the driving frame (621) extends into the adaptation groove (7) and abuts against the inner wall of the adaptation groove (7).

8. The self-centering positioning device for a door and window corner assembly machine according to claim 1, characterized in that: Each of the positioning brackets (11) is tilted 15 degrees away from the side of the door and window profile at its top edge near the door and window profile.

9. A self-centering positioning device for a door and window corner assembly machine according to claim 1, characterized in that: The elastic reset member (12) is configured as a disc spring assembly, one end of which abuts against the corresponding positioning frame (11), and the other end abuts against the body (2).

10. The multi-axis synchronous corner assembly process of a self-centering positioning device for a door and window corner assembly machine according to claim 1, characterized in that: Includes the following steps: Profile placement: Separate the two positioning frames (11), and then place the door and window profiles on the machine body (2) and position them by the positioning pins on the door and window corner assembly machine; Profile centering and positioning: The restriction on the positioning frame (11) is released, so that both positioning frames (11) slide under the elastic force of the elastic reset member (12) and abut against the door and window profile, thereby centering and positioning the door and window profile; Profile punching and riveting: The punching and riveting device on the door and window corner assembly machine punches and rivets the door and window profiles in sequence simultaneously; Profile ejection: The pneumatic ejection device on the door and window corner assembly machine ejects the riveted door and window profiles.

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