A material conveying and stacking device and method for plastic profiles before welding

Abstract

This invention provides a material conveying and stacking device and method for plastic profiles before welding, relating to the field of profile production line equipment. Addressing the problems of inconvenient placement and inaccurate material feeding in current multi-layer profile welding machines, this invention solves these problems by pre-positioning and calibrating the frame profiles, using a robotic arm for multi-layer gripping and placement, and a three-axis robotic arm for clamping and conveying. This improves the accuracy of profile stacking, conveying, and placement into the welding machine, enabling multiple sets of frame profiles corresponding to multiple frames to be accurately placed into the welding machine, thereby improving welding efficiency and quality.

Description

Technical Field

[0001] This invention relates to the field of profile production line equipment, specifically to a material conveying and stacking device and method for plastic profiles before welding. Background Technology

[0002] Plastic profiles are cut at the corners and welded to form a frame. After cutting the corners, the profiles need to be placed into a welding machine. In a multi-layer welding machine, multiple frames need to be placed in their corresponding positions simultaneously to weld multiple frames together. However, due to the structural limitations of the welding machine, each frame profile needs to be placed and fed from bottom to top to ensure that the profiles can be accurately placed into the clamps of the welding machine. The processing efficiency is limited by the placement and feeding speed.

[0003] In existing technologies, robotic arms simultaneously carry multiple sets of materials from outside the welding machine's range to the welding machine's position for placement and feeding. Multiple frame profiles corresponding to different frames enter the clamping jaws of a multi-layer welding machine together, improving placement efficiency. However, on one hand, the frame profiles carried by the robotic arm still require manual placement. Each frame profile needs to be placed in the robotic arm's carrying position, and multiple frame profiles corresponding to a frame require operation from different areas, frequently adjusting their working positions. The placement efficiency still cannot meet the needs of continuous welding production. On the other hand, when placed in the robotic arm's carrying position, operational issues can cause the frame profiles to shift. When fed into the welding machine, the end-to-end joints of the frame profiles are prone to deviation, resulting in defective products. Furthermore, during the robotic arm's transfer of frame profiles, the profiles are prone to shaking, causing the profile's position to mismatch with the welding machine's clamping position. This prevents the frame profiles carried by the robotic arm from smoothly entering the clamping jaws, leading to collisions and interference that cause the profiles to scatter and be damaged, requiring machine shutdown for correction. This can disrupt the continuous production line, causing abnormal operation of the entire line. Summary of the Invention

[0004] The purpose of this invention is to address the deficiencies of existing technologies by providing a material conveying and stacking device and method for plastic profiles before welding. This method improves the accuracy of profile stacking, conveying, and placement into the welding machine by pre-positioning and calibrating the frame profiles, using a multi-layer gripping and placement robot arm, and clamping and conveying with a three-axis robotic arm. This allows multiple sets of frame profiles corresponding to multiple frames to be accurately placed into the welding machine, thereby improving welding efficiency and welding quality.

[0005] The first objective of this invention is to provide a material conveying and stacking device for plastic profiles before welding, which adopts the following solution:

[0006] The device includes a stacking assembly, a gripping assembly, and a conveying assembly. The stacking assembly includes a material cart, a positioning frame, and a movable frame. The material cart is equipped with multiple sets of support rods, with the support rods arranged at an angle and one end connected to the upright frame. The same set of support rods forms a support part for supporting the frame profile. The material cart is located between the positioning frame and the movable frame, which are arranged at intervals. The movable frame can push the frame profile to move axially to adjust the posture of the frame profile. The gripping assembly is equipped with multiple sets of gripping parts arranged in parallel to simultaneously grip multiple frame profiles and place them into the clamping part of the conveying assembly.

[0007] Furthermore, the positioning frame and the movable frame are installed on the stacking base frame. Two positioning frames are installed on one stacking base frame, and the movable frame is located between the two positioning frames. A material cart is provided between each positioning frame and the movable frame.

[0008] Furthermore, the positioning frame has a positioning surface on the side facing the material cart, and the movable frame has a pushing surface on the side facing the material cart. The distance between the pushing surface and the positioning surface can be adjusted by moving the movable frame.

[0009] Furthermore, the support rods on the material cart are arranged in pairs to support the same frame profile. Multiple sets of support rods are distributed at intervals along the vertical direction of the upright, and the position distribution of the gripping part matches the distribution of the support rods.

[0010] Furthermore, the gripping component includes a gripping robotic arm and a mechanical claw installed at its end. The mechanical claw includes a fixed gripping plate and a movable gripping plate. The fixed gripping plate is provided with multiple spaced-apart stop claws, and the movable gripping plate is provided with multiple spaced-apart push claws. The stop claws and push claws are arranged in a one-to-one correspondence to form a gripping part. Multiple gripping parts formed by the same set of fixed gripping plates and movable gripping plates open and close synchronously.

[0011] Furthermore, the mechanical claw includes two sets of fixed gripping plates and movable gripping plates. Each set of fixed gripping plates and movable gripping plates forms a gripping part, and the two gripping parts of different sets are matched with the same frame profile.

[0012] Furthermore, the conveying assembly includes a three-axis robotic arm and a clamping component. The three-axis robotic arm has multiple output ends, each of which is connected to a clamping component. Each clamping component has two sets of clamping parts arranged separately.

[0013] Furthermore, the clamping parts in the same group operate synchronously, while the clamping parts in different groups on the same clamping member are used to clamp different frame profiles.

[0014] A second objective of the present invention is to provide a method for operating a material conveying and stacking device for plastic profiles before welding, as shown in the first objective, comprising:

[0015] The same type of frame profile is placed on the same material cart, and multiple material carts carry different types of frame profiles for the same frame;

[0016] The movable frame moves toward the fixed frame to push the frame profiles on the material cart along the axial direction until the ends of all the frame profiles on the same material cart simultaneously abut against the fixed frame, completing the end trimming.

[0017] The gripping component can simultaneously grip multiple frame profiles on the same material cart, and the gripping component can move the gripped frame profiles to the conveying component.

[0018] The clamping parts on the conveying assembly receive the frame profiles on the gripping assembly. When all the frame profiles of the same frame are fed to the clamping parts, the conveying assembly moves all the clamped frame profiles to the multi-layer welding machine.

[0019] The conveyor assembly is withdrawn from the multi-layer welding machine position, ready to receive the frame profiles corresponding to the next set of frames.

[0020] Furthermore, when the gripping component moves the frame profile, it first feeds the frame profile to the conveying component on the side away from the stacking component.

[0021] Compared with the prior art, the advantages and positive effects of this invention are:

[0022] (1) To address the problems of inconvenient placement and inaccurate feeding of profile materials in the current multi-layer profile welding machine, the following solutions are proposed: pre-positioning and calibration of frame profiles, multi-layer gripping and placement by robotic arms, and clamping and conveying by three-axis robotic arms. This improves the accuracy of profile stacking, conveying, and placement into the welding machine, enabling multiple sets of frame profiles corresponding to multiple frames to be accurately placed into the welding machine, thereby improving welding efficiency and welding quality.

[0023] (2) Multiple material carts are used to temporarily store the frame profiles. The movable frame and positioning frame are used to position the frame profiles on the material carts. When the frame profiles are pushed to adjust their position along their axial direction, the frame profiles also move and adjust their position along the inclined support rods. This achieves a dense arrangement along the axis of the support rods. The support rods support the frame profiles to achieve vertical positioning. By combining the positioning calibration in three directions, the frame profiles on the material carts are placed in the set position, improving the gripping accuracy and laying the foundation for accurate docking and welding in the future.

[0024] (3) The end of the robot arm is a multi-layer gripper that opens and closes synchronously. It simultaneously grips multiple frame profiles corresponding to the multi-layer welding machine clamp, reducing the error caused by gripping the same frame profile multiple times. Each frame profile can enter the gripping part of the robot arm smoothly at the same time, improving the conveying efficiency. In addition, combined with the synchronous opening and closing gripping structure of the gripper, the two gripping parts are spaced apart and simultaneously grip the same frame profile, improving the stability of the gripped profile when moving and improving the conveying accuracy.

[0025] (4) The three-axis robotic arm uses multiple vertical booms to clamp and lift the frame profiles. It waits above the welding machine. After the upper frame profiles are welded, the frame is output from below, and the boom is lowered to stack the frame profiles of this group, so as to achieve the purpose of continuous welding. The three-axis robotic arm structure allows the clamping parts at the end of the boom to move freely in the three-axis direction, improving its flexibility. After the frame profiles are stacked, they can be smoothly removed from the welding machine and promptly restored to the placement position to cooperate with the robotic arm, meeting the needs of rapid stacking of frame profiles during continuous welding. Attached Figure Description

[0026] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0027] Figure 1 This is a schematic diagram of the material conveying and stacking device for plastic profiles before welding in Embodiments 1 and 2 of the present invention.

[0028] Figure 2 This is a schematic diagram of the stacking component and gripping component in Embodiments 1 and 2 of the present invention.

[0029] Figure 3 This is a schematic diagram of the robotic arm in Embodiments 1 and 2 of the present invention.

[0030] Figure 4 This is a schematic diagram of the conveying components in Embodiments 1 and 2 of the present invention.

[0031] Figure 5 This is a schematic diagram of the clamping component in Embodiments 1 and 2 of the present invention.

[0032] Among them, 1. Stacking assembly, 2. Grabbing assembly, 3. Conveying assembly, 4. Material cart, 5. Fixed frame, 6. Movable frame, 7. Bearing unit, 8. Support rod, 9. Vertical frame, 10. Stacking base frame, 11. Grabbing robotic arm, 12. Mechanical claw, 13. Movable gripper, 14. Fixed gripper, 15. Gantry frame, 16. Crossbeam, 17. Boom, 18. Clamping component, 19. Multi-layer welding machine, 20. Movable clamping plate, 21. Fixed clamping plate, 22. Partition. Detailed Implementation

[0033] Example 1

[0034] In a typical embodiment of the present invention, such as Figures 1-5 As shown, a material conveying and stacking device for plastic profiles before welding is presented.

[0035] Currently, the working efficiency of the multi-layer welding machine 19 is affected by the speed of conveying and stacking the frame profiles. The frame profiles are prone to positional deviations during stacking and conveying, resulting in a large offset between the actual position and the required position of the frame profiles when they are stacked into the welding machine. The position of the frame profiles and the position of the clamps cannot match, causing the profiles to scatter and fail to enter the clamps. There is also the problem of welding deviations of the frame profiles that enter the clamps, resulting in defective products.

[0036] Based on this, this embodiment provides a material conveying and stacking device for plastic profiles before welding. It adjusts the stacking, placement and conveying processes, and improves the accuracy and stability of the transfer by pre-positioning and calibrating before grabbing and transporting, thereby achieving precise positioning of the frame profiles during welding and improving welding efficiency and welding quality.

[0037] The following is a detailed description of the above-mentioned material conveying and stacking device for plastic profiles before welding, with reference to the accompanying drawings.

[0038] See Figure 1 The material conveying and stacking device for plastic profiles before welding includes a stacking assembly 1, a gripping assembly 2, and a conveying assembly 3. The frame profiles to be loaded are placed on the stacking assembly 1 and stacked sequentially. Before gripping and placing, the stacking assembly 1 can organize the placed frame profiles to pre-position and calibrate them. The gripping assembly 2 grips and places the frame profiles placed on the stacking assembly 1, and can simultaneously grip multiple frame profiles distributed on different layers and move them to the conveying assembly 3. The conveying assembly 3 delivers multiple sets of frame profiles corresponding to the frame into the multi-layer welding machine 19. The conveying assembly 3 can temporarily support and clamp the frame profiles, and adjust the position of the clamped frame profiles through three-axis movement, moving them from the placement position into the multi-layer welding machine 19. In coordination with the action of the multi-layer welding machine 19, it accurately puts multiple sets of frame profiles into the multi-layer clamping station, improving welding efficiency.

[0039] The stacking assembly 1, gripping assembly 2, and conveying assembly 3 will be introduced separately according to their working order.

[0040] The stacking assembly 1 includes a material cart 4, a positioning frame, and a movable frame 6. The positioning frame and the movable frame 6 are installed on the stacking base frame 10. The positioning frame serves as a reference frame. After the position is determined according to the profile being processed, the positioning frame and the stacking base frame 10 are kept in a fixed position. The movable frame 6 is installed on the stacking base frame 10 through a sliding pair. The movable frame 6 can reciprocate relative to the stacking base frame 10 to change the distance between the movable frame 6 and the positioning frame. The material cart 4 is arranged between the movable frame 6 and the positioning frame. After loading the profile, the material cart 4 can move to the arrangement position between the movable frame 6 and the fixed frame 5.

[0041] The sliding pair can be a linear motion component, such as a slide rail slider structure, in which the slide rail is arranged on the stacking base 10 and the slider is installed on the movable frame 6, so that the movable frame 6 can slide along the stacking base 10; or a pulley and slide groove structure, in which a slide groove is arranged on the stacking base 10 and a pulley is installed on the movable frame 6, and the movable frame 6 moves relative to the stacking base 10 through the cooperation of the pulley and the slide groove; other sliding pair forms can also be used as needed.

[0042] The material cart 4 is equipped with inclined support rods 8 for supporting the frame profiles. The ends of the multi-layer support rods 8 are respectively installed on the uprights 9. The support rods 8 can support multiple frame profiles arranged sequentially along the axial direction of the support rods 8. One end of the support rod 8 connected to the uprights 9 is lower than the other end of the support rod 8. The frame profiles supported by the support rods 8 have a tendency to move closer to the uprights 9, so that the frame profiles can be stably arranged sequentially.

[0043] The support rods 8 connecting the upright 9 are divided into multiple layers, with two support rods 8 spaced apart in each layer. The two support rods 8 in the same layer, together with the upright 9, form the load-bearing part 7 for the frame profile. The same frame profile is supported by two support rods 8, which improves the stability of the load-bearing.

[0044] Because the support rod 8 is arranged at an angle, the multiple frame profiles it supports also form an inclined surface. The positioning frame and the movable frame 6 are respectively equipped with push plates that abut the ends of the frame profiles. Therefore, the push plates are also arranged at an angle corresponding to the frame profiles. The number of push plates set on the positioning frame and the movable frame 6 is equal to the number of layers of push rods distributed on the upright frame 9 of the material cart 4, thereby realizing the positional correspondence between the push plates and the frame profiles.

[0045] As the movable frame 6 moves, the push plate on it can gradually approach and contact the frame profiles on the push cart 4. For some frame profiles that have shifted position, the position can be corrected under the action of the movable frame 6 until one end of all the frame profiles abuts against the positioning frame, thus completing the pre-positioning calibration of the frame profiles on the cart 4, which is convenient for subsequent precise gripping.

[0046] A typical frame is obtained by welding four side profiles. Therefore, in this embodiment, the stacking assembly 1 is equipped with two sets of stacking base frames 10. Each set of stacking base frames 10 is equipped with two material carts 4, which respectively support the four side profiles of the frame. Each set of stacking base frames 10 is provided with two positioning frames, which are located at both ends of the stacking base frame 10. A movable frame 6 is located between the two positioning frames, and the two positioning frames share the same movable frame 6. A material cart 4 is arranged between one positioning frame and the movable frame 6, and another material cart 4 is arranged between the other positioning frame and the movable frame 6. The movable frame 6 moves in different directions to push the side profiles supported on the two material carts 4 respectively, so as to achieve pre-positioning calibration. The two sets of stacking base frames 10 are arranged side by side with intervals.

[0047] It should be noted that multiple material carts 4 are used to temporarily store the frame profiles. The movable frame 6 and positioning frame are used to position the frame profiles on the material carts 4. When the frame profiles are pushed to adjust their position along their axial direction, the frame profiles also move and adjust their position along the inclined support rod 8, so as to achieve a dense arrangement along the axis of the support rod 8. The support rod 8 supports the frame profiles to achieve vertical positioning. By combining the positioning calibration in three directions, the frame profiles on the material carts 4 are placed in the set position, improving the gripping accuracy and laying the foundation for accurate subsequent welding.

[0048] The gripping component 2 uses a robotic arm, which includes a gripping robotic arm 11 and a robotic claw 12. The gripping robotic arm 11 is a multi-degree-of-freedom robotic arm, and the robotic claw 12 is installed at the end of the gripping robotic arm 11. The gripping robotic arm 11 is slidably arranged on the ground rail between the two sets of stacking base frames 10. The gripping robotic arm 11 can drive the robotic claw 12 to move to the position of each material cart 4, and can grip and release the frame profiles on each material cart 4 respectively.

[0049] The mechanical gripper 12 includes a fixed gripping plate 14 and a movable gripping plate 13. The fixed gripping plate 14 is provided with multiple spaced-apart pawls, and the movable gripping plate 13 is provided with multiple spaced-apart pushers. The pawls and pushers are arranged in a one-to-one correspondence to form a gripping part. When the movable gripping plate 13 moves relative to the fixed gripping plate 14, the multiple gripping parts formed therein open and close synchronously, gripping or releasing the frame profile at the same time.

[0050] It is understandable that by cooperating with two sets of fixed gripping plates 14 and movable gripping plates 13, two sets of gripping parts are formed, each set including multiple parts. For the same frame profile, each set of gripping parts is assigned one gripping part to grip, that is, the same frame profile is cooperated with two gripping parts of different sets to grip the same frame profile from two interval positions at the same time, which improves the stability of the gripped profile when it moves and improves the conveying accuracy.

[0051] Taking a four-layer welding machine as an example, each set of fixed gripping plates 14 and movable gripping plates 13 forms four gripping parts distributed at intervals. The gripping parts on the two sets of fixed gripping plates 14 are arranged opposite to each other, and can grip four frame profiles at the same time. The position of the gripping part corresponds to the position of the frame profile on the material cart 4, so that each gripping part can grip the corresponding frame profile.

[0052] The fixed gripper 14 and the movable gripper 13 can slide relative to each other. A cylinder, electric cylinder or other similar device can be used as the driving component of the movable gripper 13, so that the movable gripper 13 can slide back and forth relative to the fixed gripper 14. When the distance between the pusher and the stopper changes, it can adapt to different specifications of profiles, so that the mechanical gripper 12 can be universal.

[0053] The conveying assembly 3 includes a three-axis robotic arm and a clamping component 18. The three-axis robotic arm adopts a combination structure of a gantry frame 15, a crossbeam 16, and a boom 17. The two crossbeams 16 are mounted on the gantry frame 15 and can move along the gantry frame 15 to form an X-direction movement. The boom 17 is mounted on the crossbeam 16 and can move along the crossbeam 16 to form a Y-direction movement. The boom 17 itself can be raised or lowered relative to the crossbeam 16 to form a Z-direction movement. Through the independent movements in the X, Y, and Z directions, the clamping component 18 at the end of the boom 17 can achieve free movement in three axes.

[0054] Taking a rectangular frame as an example, four clamping members 18 are configured corresponding to the four frame profiles. Each clamping member 18 corresponds to a boom 17, and two booms 17 are installed on each crossbeam 16, so that the four clamping members 18 are located at the four corners of the rectangle. Each clamping member 18 is provided with two sets of clamping plates, and each set of clamping plates forms a clamping part. The two sets of clamping parts face different directions. Each set includes two clamping plates, namely a movable clamping plate 20 and a fixed clamping plate 21. The frame profiles are clamped or released by relative movement. The two sets of clamping parts on the same clamping member 18 are used to clamp different frame profiles. Adjacent clamping members 18 each provide a clamping part to clamp the same frame profile.

[0055] Taking four clamping parts 18 as an example, the four clamping parts 18 are provided with eight sets of clamping plates, thereby forming eight sets of clamping parts, which clamp four sets of frame profiles in four directions. Each set of frame profiles corresponds to two sets of clamping parts located on different lifting arms 17. Each frame profile is clamped and fixed by two clamping parts on different lifting arms 17. It can be understood that each set of clamping parts is provided with multiple clamping parts, which are arranged sequentially and at intervals along the lifting direction of the lifting arm 17, so that multiple frame profiles can be grabbed at the same time, which meets the needs of the multi-layer welding machine 19.

[0056] To reduce interference between adjacent frame edges during transport and stacking, a partition 22 is provided on the clamping member 18. The partition 22 is located between two sets of clamping plates in the same clamping member 18, which isolates the two sets of clamping parts formed on the same clamping member 18 and reduces the problem of mutual interference.

[0057] The three-axis robotic arm uses multiple vertical booms 17 to clamp and lift the frame profiles. It waits above the welding machine until the previous set of frame profiles is welded, then outputs the frame from below and lowers the booms 17 to stack the current set of frame profiles, achieving continuous welding. The three-axis robotic arm structure allows the clamping parts 18 at the ends of the booms 17 to move freely in three directions, improving its flexibility. After the frame profiles are stacked, they can be smoothly removed from the welding machine and promptly returned to their placement position to match the robotic arm, meeting the need for rapid stacking of frame profiles during continuous welding.

[0058] Example 2

[0059] In another typical embodiment of the present invention, such as Figures 1-5 As shown, a working method is presented.

[0060] The material conveying and stacking device for plastic profiles before welding, as described in Example 1, includes:

[0061] The same type of frame profile is placed on the same material cart 4, and multiple material carts 4 carry different types of frame profiles for the same frame;

[0062] The movable frame 6 moves toward the fixed frame 5 to push the frame profiles on the material cart 4 to move axially until the ends of all the frame profiles on the same material cart 4 simultaneously abut against the fixed frame 5, thus completing the end trimming.

[0063] The gripping component 2 simultaneously grips multiple frame profiles on the same material cart 4, and the gripping component 2 moves the gripped frame profiles to the conveying component 3;

[0064] The clamping member 18 on the conveying component 3 receives the frame profile on the gripping component 2. When all the frame profiles of the same frame are fed to the clamping member 18, the conveying component 3 moves all the clamped frame profiles to the multi-layer welding machine 19.

[0065] The conveyor assembly 3 is withdrawn from position 19 of the multi-layer welding machine, ready to receive the frame profiles corresponding to the next set of frames.

[0066] Furthermore, when the gripping component 2 moves the frame profile, it first feeds the frame profile to the conveying component 3 on the side away from the stacking component 1.

[0067] The three-axis robotic arm uses multiple vertical booms 17 to clamp and lift the frame profiles. It waits above the welding machine until the previous set of frame profiles is welded, then outputs the frame from below and lowers the booms 17 to stack the current set of frame profiles, achieving continuous welding. The three-axis robotic arm structure allows the clamping parts 18 at the ends of the booms 17 to move freely in three directions, improving its flexibility. After the frame profiles are stacked, they can be smoothly removed from the welding machine and promptly returned to their placement position to match the robotic arm, meeting the need for rapid stacking of frame profiles during continuous welding.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A material conveying and stacking device for plastic profiles before welding, characterized in that, The system includes a stacking assembly, a gripping assembly, and a conveying assembly. The stacking assembly includes a material cart, a positioning frame, and a movable frame. The material cart is equipped with multiple sets of support rods, with the support rods arranged at an angle and one end connected to the upright frame. The same set of support rods forms a support part for supporting the frame profiles. The support rods support multiple frame profiles arranged sequentially along the support rod axis. One end of the support rod connected to the upright frame is lower than the other end of the support rod. The frame profiles supported by the support rods have a tendency to move closer to the upright frame, so that the frame profiles are stably arranged sequentially. The support rods connected to the upright frame are divided into multiple layers, with two support rods arranged at intervals in each layer. The two support rods in the same layer, together with the upright frame, form a support part for supporting the frame profiles. The same frame profile is supported by two support rods. The material cart is located between the positioning frame and the movable frame arranged at intervals. The movable frame can push the frame profile to move along the axis to adjust the posture of the frame profile. The gripping component is equipped with multiple gripping parts arranged in parallel to grip multiple frame profiles at the same time and place them into the clamping part of the conveying component. The support rods on the material cart are arranged in pairs to support the same frame profile. Multiple sets of support rods are distributed at intervals along the vertical of the frame, and the position distribution of the gripping part matches the distribution of the support rods. The positioning frame and the movable frame are installed on the stacking base frame. Two positioning frames are installed on one stacking base frame, and the movable frame is located between the two positioning frames. A material cart is provided between each positioning frame and the movable frame. The positioning frame has a positioning surface on the side facing the material cart, and the movable frame has a pushing surface on the side facing the material cart. The distance between the pushing surface and the positioning surface is adjusted by moving the movable frame.

2. The material conveying and stacking device for plastic profiles before welding as described in claim 1, characterized in that, The gripping component includes a gripping robotic arm and a mechanical claw installed at its end. The mechanical claw includes a fixed gripping plate and a movable gripping plate. The fixed gripping plate is provided with multiple spaced-apart stop claws, and the movable gripping plate is provided with multiple spaced-apart push claws. The stop claws and push claws are arranged in a one-to-one correspondence to form a gripping part. Multiple gripping parts formed by the same set of fixed gripping plates and movable gripping plates open and close synchronously.

3. The material conveying and stacking device for plastic profiles before welding as described in claim 1, characterized in that, The mechanical claw includes two sets of fixed gripping plates and movable gripping plates. Each set of fixed gripping plates and movable gripping plates forms a gripping part, and the two gripping parts of different sets are matched with the same frame profile.

4. The material conveying and stacking device for plastic profiles before welding as described in claim 1, characterized in that, The conveying assembly includes a three-axis robotic arm and a clamping component. The three-axis robotic arm has multiple output ends, each of which is connected to a clamping component. Each clamping component has two sets of clamping parts arranged separately.

5. The material conveying and stacking device for plastic profiles before welding as described in claim 4, characterized in that, The clamping parts in the same group move synchronously, while the clamping parts in different groups on the same clamping member are used to clamp different frame profiles.

6. A method for operating the material conveying and stacking device for plastic profiles before welding as described in any one of claims 1-5, characterized in that, include: The same type of frame profile is placed on the same material cart, and multiple material carts carry different types of frame profiles for the same frame; The movable frame moves toward the fixed frame to push the frame profiles on the material cart along the axial direction until the ends of all the frame profiles on the same material cart simultaneously abut against the fixed frame, completing the end trimming. The gripping component can simultaneously grip multiple frame profiles on the same material cart, and the gripping component can move the gripped frame profiles to the conveying component. The clamping parts on the conveying assembly receive the frame profiles on the gripping assembly. When all the frame profiles of the same frame are fed to the clamping parts, the conveying assembly moves all the clamped frame profiles to the multi-layer welding machine. The conveyor assembly is withdrawn from the multi-layer welding machine position, ready to receive the frame profiles corresponding to the next set of frames.

7. The working method as described in claim 6, characterized in that, When the gripping component moves the frame profile, it first feeds the frame profile to the conveying component on the side away from the stacking component.

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