A metal furniture automatic assembly welding system and its application method

Abstract

The present invention provides an automatic assembly welding system for metal furniture applied to the welding field. The system can intelligently identify rods and implement welding and fixed connection by setting a welding module and a detection module; the detection module can intelligently identify and analyze the installation position and the welding seam condition, thereby ensuring the execution effect of welding; the flip module can adjust the angle between the rod and the welding gun, thereby facilitating the welding gun to implement high-quality welding of each welding point according to welding requirements; the first fixing unit is provided with a rotating downward pressure cylinder, which can fix adjacent arc-shaped connecting rods at the same time, and the pressure rod can be rotated so that when in standby state, the pressure rod will not block the installation movement path of the arc-shaped connecting rod, thereby improving the assembly efficiency.

Description

Technical Field

[0001] The invention relates to the field of metal furniture welding processing, and in particular to an automatic metal furniture assembly welding system and an application method thereof. Background Art

[0002] With the development of the times, the categories, materials, varieties and uses of furniture have been continuously enriched and innovated, becoming an important foundation for establishing work and living spaces. Metal furniture, as a type of furniture material classification, can also meet the application needs of more users.

[0003] Metal furniture uses metal pipes, plates or sticks as its main structure. At the same time, metal furniture has the characteristics of distinct personality, diverse varieties, high cost performance, stability and corrosion resistance. The assembly of metal furniture is completed through a welding system. While meeting the shape design requirements of different furniture, it also has higher requirements on welding technology and welding execution quality. The existing metal furniture welding is mainly carried out manually using a welding gun for fixed welding. The production efficiency is low and the requirements on the implementation personnel are also high. At the same time, the welding quality is difficult to guarantee. How to adopt the existing intelligent processing application to metal furniture assembly welding is the development direction of the existing furniture automation assembly technology. Summary of the invention

[0004] The purpose of the present invention is to address the existing deficiencies and propose a metal furniture automatic assembly welding system and an application method thereof.

[0005] In order to overcome the shortcomings of the prior art, the present invention adopts the following technical solutions:

[0006] An automatic assembly and welding system for metal furniture comprises: a first mounting frame;

[0007] A flip module, used to drive the first mounting frame to flip;

[0008] A placement rack, arranged on the first mounting rack;

[0009] A fixing module, arranged on the first mounting frame, for fixing the rods on the placement frame;

[0010] A welding module, used for welding the rods on the placement rack;

[0011] A detection module is used to collect rod installation information and welding execution information;

[0012] A control module, which is respectively connected to the flip module, the welding module, and the detection module in communication, and is also used to send control instructions to each connected module;

[0013] A clamping module is also provided, which is used to match and place the rods on the placement rack, and is also used to remove the finished products from the placement rack;

[0014] The flip module includes a first motor, a transmission mechanism and a rotating mounting seat, wherein the first motor is arranged on the rotating mounting seat, and the first motor is connected to the first mounting frame through the transmission mechanism, thereby driving the first mounting frame to flip;

[0015] The placement frame includes a first fixing frame, a second fixing frame, a third fixing frame and a top fixing frame. The first fixing frame is used to place the right-angle support rod, the second fixing frame is used to place the middle support rod, the third fixing frame is used to place the arc-shaped connecting rod, and the top fixing frame is used to place the top rod.

[0016] Further, the fixing module includes a first fixing unit, a second fixing unit, a third fixing unit and a fourth fixing unit, the first fixing unit is used to fix the arc-shaped connecting rod, the second fixing unit is used to fix the middle support rod, the third fixing unit is used to fix the top rod, and the fourth fixing unit is used to fix the right-angle support rod;

[0017] Further, the first fixing unit includes a first rotating downward pressing cylinder and a first clamping mechanism, and the second fixing unit includes a pressing cylinder;

[0018] Further, the first rotary downward-pressing cylinder comprises a driving cylinder mechanism and a first pressing rod, the driving cylinder mechanism is mounted on the first mounting frame, the first pressing rod is arranged on the driving cylinder mechanism, and the first pressing rod is provided with two limiting grooves, the positions of the two limiting grooves respectively match the positions of the two arc-shaped connecting rods, so that after the first pressing rod is contracted and pressed, the two adjacent arc-shaped connecting rods can be limited and locked;

[0019] Furthermore, the welding module includes a first mechanical arm and a welding gun, the welding gun is arranged on the first mechanical arm, and the first mechanical arm is used to drive the welding gun to move;

[0020] Furthermore, the clamping module includes a second mechanical arm and a clamping mechanism, wherein the clamping mechanism is arranged on the second mechanical arm and is used to clamp and fix the rod, and the second mechanical arm is used to drive the clamping mechanism to move;

[0021] Furthermore, the detection module includes a first camera, a second camera and an analysis unit, the first camera is installed on the welding module, the second camera is installed on a first mounting bracket, and the analysis unit is used to compare and analyze the real-time image materials collected by the first camera and the second camera, and the analysis unit is communicatively connected to the control module.

[0022] The application method of the welding system comprises:

[0023] S1, loading, placing the rods on each placement rack in matching order;

[0024] The rods can be installed and placed on the rack by means of a clamping module or manually;

[0025] The installation sequence is: first, place and install the right-angle support rod on the first fixing frame, lock it with the latch of the fourth fixing unit, then place and install the middle support rod and the top rod on the second fixing frame and the top mounting frame respectively, and finally install each arc-shaped connecting rod on the placement slot of each third fixing frame respectively, and at the same time, collect the scene information of the placement frame position through the second camera, so as to analyze and identify whether each rod has been placed and installed;

[0026] S2, locking and fixing, controlling the fixing module to press and fix the rods on the placement rack;

[0027] S3, detection, the detection module detects the connection tightness between the rods, and if the connection tightness between all the rods is qualified, the next process is carried out;

[0028] S4, welding, the welding module performs welding on the set connection points;

[0029] The set connection points meet the welding connection standards;

[0030] S5. Remove the metal furniture after it has been welded and left to cool.

[0031] The beneficial effects achieved by the present invention are:

[0032] This system can intelligently identify the rods and implement welding and fixed connection by setting welding modules and detection modules;

[0033] The detection module can intelligently identify and analyze the installation position, installation degree and welding seam condition of the rods, thereby ensuring the execution effect of welding;

[0034] The angle between the rod and the welding gun can be adjusted by setting the flip module, so that the welding gun can perform high-quality welding on each welding point according to welding requirements;

[0035] The first fixing unit is provided with a rotating pressing cylinder, which can fix adjacent arc-shaped connecting rods at the same time, and the pressing rod can be rotated so that in the standby state, the pressing rod will not block the installation movement path of the arc-shaped connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0037] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0038] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0039] Figure 3 It is a schematic diagram of the composition structure of the metal furniture of the present invention.

[0040] Figure 4 It is a schematic structural diagram of the second fixing unit of the present invention.

[0041] Figure 5 It is a schematic structural diagram of the first rotary downward pressure cylinder of the present invention.

[0042] Figure 6 It is a schematic diagram of the structure of the touch block of the present invention.

[0043] Figure 7 It is a schematic block diagram of the process of the present invention.

[0044] Figure 8 It is a schematic diagram of the positioning effect of the analysis unit of the present invention on the welding path on the rod.

[0045] Fig. 9 This is a schematic diagram of the wiring effect of another rod collected by the analysis unit of the present invention.

[0046] Fig.10 It is a schematic diagram of the overall structure of another embodiment of the present invention.

[0047] In the figure: 1 first mounting frame, 2 flip module, 3 placement frame, 31 first fixing frame, 32 second fixing frame, 33 third fixing frame, 34 top fixing frame, 4 fixing module, 41 first fixing unit, 412 piston rod, 413 return spring, 414 touch block, 4141 first limit slider part, 4142 second limit slider part, 415 cylinder, 451 air chamber, 452 mounting chamber, 453 air hole, 454 first mounting hole, 416 piston, 417 first pressure rod, 418 The first limiting seat, 419 the second limiting seat, 42 the second fixing unit, 421 the first telescopic cylinder, 422 the second pressure rod, 423 the connecting rod, 424 the fixing seat, 43 the third fixing unit, 44 the fourth fixing unit, 5 the welding module, 6 the detection module, 71 the right-angle support rod, 72 the middle support rod, 73 the arc-shaped connecting rod, 74 the push rod, 8 the clamping module, 9 the placing table, 101 the rod connection position contour line, 102 the first track wiring, 103 the second track wiring, 104 the welding path. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail in conjunction with its embodiments below; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. For those skilled in the art, other systems, methods and / or features of this embodiment will become apparent after reviewing the following detailed description. It is intended that all such additional systems, methods, features and advantages are included in this specification, included within the scope of the present invention, and protected by the appended claims. Additional features of the disclosed embodiments are described in the following detailed description, and these features will be apparent from the following detailed description.

[0049] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0050] Embodiment 1.

[0051] like Figures 1 to 6 As shown, a metal furniture automatic assembly welding system comprises: a first mounting frame;

[0052] A flip module, used to drive the first mounting frame to flip;

[0053] A placement rack, arranged on the first mounting rack;

[0054] A fixing module, arranged on the first mounting frame, for fixing the rods on the placement frame;

[0055] A welding module, used for welding the rods on the placement rack;

[0056] A detection module is used to collect rod installation information and welding execution information;

[0057] A control module, which is respectively connected to the flip module, the welding module, and the detection module in communication, and is also used to send control instructions to each connected module;

[0058] A clamping module is also provided, which is used to match and place the rods on the placement rack, and is also used to remove the finished products from the placement rack;

[0059] The flip module includes a first motor, a transmission mechanism and a rotating mounting seat, wherein the first motor is arranged on the rotating mounting seat, and the first motor is connected to the first mounting frame through the transmission mechanism, thereby driving the first mounting frame to flip;

[0060] The placement frame includes a first fixing frame, a second fixing frame, a third fixing frame and a top fixing frame, wherein the first fixing frame is used to place the right-angle support rod, the second fixing frame is used to place the middle support rod, the third fixing frame is used to place the arc-shaped connecting rod, and the top fixing frame is used to place the top rod;

[0061] The third fixing frame is provided with placement slots matching the number of arc-shaped connecting rods;

[0062] The fixing module includes a first fixing unit, a second fixing unit, a third fixing unit and a fourth fixing unit, wherein the first fixing unit is used to fix the arc-shaped connecting rod, the second fixing unit is used to fix the middle support rod, the third fixing unit is used to fix the top rod, and the fourth fixing unit is used to fix the right-angle support rod;

[0063] The first fixing unit includes a first rotary pressing cylinder and a first clamping mechanism, and the second fixing unit includes a pressing cylinder;

[0064] The first rotary downward-pressing cylinder comprises a driving cylinder mechanism and a first pressing rod, wherein the driving cylinder mechanism is mounted on a first mounting frame, the first pressing rod is arranged on the driving cylinder mechanism, and two limiting grooves are arranged on the first pressing rod, and the positions of the two limiting grooves respectively match the positions of the two arc-shaped connecting rods, so that after the first pressing rod is contracted and pressed, the two adjacent arc-shaped connecting rods can be limited and locked;

[0065] The welding module includes a first mechanical arm and a welding gun, wherein the welding gun is arranged on the first mechanical arm, and the first mechanical arm is used to drive the welding gun to move;

[0066] The clamping module includes a second mechanical arm and a clamping mechanism, wherein the clamping mechanism is arranged on the second mechanical arm and is used to clamp and fix the rod, and the second mechanical arm is used to drive the clamping mechanism to move;

[0067] The detection module includes a first camera, a second camera and an analysis unit. The first camera is installed on the welding module, and the second camera is installed on a first mounting bracket. The analysis unit is used to compare and analyze the real-time image materials collected by the first camera and the second camera. At the same time, the analysis unit is communicatively connected with the control module.

[0068] Embodiment 2: This embodiment is a further description of the above embodiment. It should be understood that this embodiment includes all the above technical features and is further described in detail:

[0069] The driving cylinder mechanism comprises a piston rod, a return spring, a touch block, a cylinder barrel, and a piston, the cylinder barrel being provided with an air chamber, an installation chamber, an air hole, and a first installation hole, the air chamber and the installation chamber being separated by a partition, the partition being provided with a second installation hole, the piston rod being slidably arranged on the first installation hole and the second installation hole, the piston being arranged in the air chamber and fixedly connected to the piston rod, the touch block being arranged in the installation chamber and fixedly connected to the piston rod, the installation chamber being provided with a first limiting seat and a second limiting seat, the first limiting seat being provided with a first moving groove, the second limiting seat being provided with a second moving groove, the touch block being provided with a first limiting sliding block portion and a second limiting sliding block portion, the first limiting sliding block portion being matched with the first moving groove, the second limiting sliding block portion being matched with the second moving groove, the return spring being arranged in the installation chamber and abutting against the piston, the outer end of the piston rod being fixedly connected to the first pressure rod, and the air hole being connected to the output end of the air pump through an air guide pipe;

[0070] The first mounting hole and the second mounting hole are both provided with sealing rings;

[0071] When it is necessary to drive the first rotary downward-pressing cylinder to press the rod, the air pump inflates the air chamber through the air hole, thereby pushing the piston and the piston rod to slide, thereby driving the touch block to move, so that the second limit slider portion of the touch block abuts against the second limit seat, so that the touch block rotates and positions along the groove trend of the second moving groove of the second limit seat, so that the first pressure rod rotates to the first position and then descends to press the rod;

[0072] When the first pressure rod needs to be raised, the air in the air chamber is discharged through the air hole, and under the action of the return spring, the touch block is pushed to move to one side of the first limit seat, so that the first limit slider portion of the touch block abuts against the first limit seat, so that the touch block is rotated and fixed along the groove trend of the first moving groove of the first limit seat, so that the first pressure rod is rotated to the second position and then lifted;

[0073] The first moving groove and the second moving groove are both provided with a sliding inclined portion and a position limiting lifting portion, wherein the sliding inclined portion is used for the position limiting sliding block portion to slide, and the position limiting lifting portion is used for only the position limiting sliding block portion to lift;

[0074] The second fixing unit comprises a first telescopic cylinder, a second pressure rod, a connecting rod, and a fixing seat, one end of the second pressure rod is connected to the rotation of the piston rod of the first telescopic cylinder, the fixing seat is fixedly arranged on the cylinder body of the first telescopic cylinder, and the connecting rod is connected to the fixing seat and the middle part of the second pressure rod for rotation respectively;

[0075] The third fixing unit comprises a second rotary downward pressing cylinder and a second clamping mechanism, and the second rotary downward pressing cylinder and the second clamping mechanism are both mounted on the first mounting frame through a lifting frame;

[0076] The fourth fixing unit comprises a telescopic rod, a latch, and a first mounting seat, wherein the telescopic rod is slidably arranged on the first mounting seat, the latch is arranged on the telescopic rod, the telescopic rod is used to drive the latch to extend and retract, and the right-angle support rod is provided with a socket matching the latch;

[0077] The welding system is also provided with a placing table, which is used to place the rods to be assembled and also used to place the assembled metal furniture;

[0078] The clamp mechanism can be configured as a cylinder-driven clamp mechanism, and the clamp is driven by the cylinder to automatically implement clamping and fixing;

[0079] The welding module includes a first mechanical arm and a welding gun, wherein the welding gun is arranged on the first mechanical arm, and the first mechanical arm is used to drive the welding gun to move;

[0080] The clamping module includes a second mechanical arm and a clamping mechanism, wherein the clamping mechanism is arranged on the second mechanical arm and is used to clamp and fix the rod, and the second mechanical arm is used to drive the clamping mechanism to move;

[0081] In this embodiment, the rods constituting the metal furniture are classified according to the installation position and structural shape, and include: right-angle support rods, middle support rods, arc-shaped connecting rods, and top rods;

[0082] There are multiple arc-shaped connecting rods, and the lengths thereof are adaptively changed according to different installation positions;

[0083] The welding connection standard of the metal furniture is as follows: both ends of the arc-shaped connecting rod are connected to the right-angle supporting rod, the middle of the arc-shaped connecting rod is connected to the middle supporting rod, and both ends of the right-angle supporting rod are connected to the top rod;

[0084] The detection module includes a first camera, a second camera and an analysis unit, wherein the first camera is mounted on the welding module, the second camera is mounted on the first mounting bracket, and the analysis unit is used to compare and analyze the real-time image materials collected by the first camera and the second camera, and the analysis unit is communicatively connected with the control module;

[0085] The detection module further includes a radiation device, which is configured to emit marking radiation for auxiliary identification, and the radiation device is a laser lamp.

[0086] By setting up a welding module and a detection module, this system can intelligently identify the rods and implement welding and fixed connection; the detection module can be used to intelligently identify and analyze the installation position and the welding seam condition, thereby ensuring the execution effect of welding; by setting up a flip module, the angle between the rod and the welding gun can be adjusted, thereby facilitating the welding gun to implement high-quality welding on each welding point according to welding requirements; the first fixing unit is provided with a rotating downward pressure cylinder, which can fix adjacent arc-shaped connecting rods at the same time, and the pressure rod can be rotated so that when in standby mode, the pressure rod will not block the installation movement path of the arc-shaped connecting rod, thereby improving the efficiency of assembly.

[0087] Embodiment 3: This embodiment is a further description of the above embodiment. It should be understood that this embodiment includes all the above technical features and is further described in detail:

[0088] Further integration Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, the application method of the welding system comprises:

[0089] S1, loading, placing the rods on each placement rack in matching order;

[0090] The rods can be installed and placed on the rack by means of a clamping module or manually;

[0091] The installation sequence is: first, place and install the right-angle support rod on the first fixing frame, lock it with the latch of the fourth fixing unit, then place and install the middle support rod and the top rod on the second fixing frame and the top mounting frame respectively, and finally install each arc-shaped connecting rod on the placement slot of each third fixing frame respectively, and at the same time, collect the scene information of the placement frame position through the second camera, so as to analyze and identify whether each rod has been placed and installed;

[0092] S2, locking and fixing, controlling the fixing module to press and fix the rods on the placement rack;

[0093] S3, detection, the detection module detects the connection tightness between the rods, and if the connection tightness between all the rods is qualified, the next process is carried out;

[0094] The rods are irradiated by a ray device to form a first track line and a second track line on two adjacent rods respectively. The analysis unit analyzes and constructs the rod connection position contour line through the track line image information collected by the first camera, and analyzes the line misalignment between the first track line and the second track line.

[0095] The pattern of the radiation device irradiating the plane is a line marking radiation with a plurality of mutually parallel straight lines;

[0096] If the detected connection degree meets the requirements, the welding path is determined by the contour line of the rod connection position, and the welding module performs welding along the welding path;

[0097] If the detected connection degree does not meet the requirements, feedback will be given through the control module to readjust the position of the rod;

[0098] In this embodiment, the specific method of determining the welding path through the contour line of the connecting position of the rods is as follows: the welding path is located at the midline position of the contour lines of the connecting positions of the two rods;

[0099] like Figure 8 As shown, the two rods are the top rod and the middle support rod. When the line emitted by the ray device is irradiated on the top rod, the line is in an arc shape because the top rod is a round tube. When the line is irradiated on the middle support rod, the line is in a straight line shape because the top surface of the middle support rod is a plane. Through the change of the line trend, the analysis unit can quickly identify the boundary between the top rod and the middle support rod, thereby intelligently analyzing the tight connection degree of the two rods.

[0100] like Fig. 9 As shown in the figure, the two rods are respectively an arc-shaped connecting rod and a middle supporting rod. It can be seen that the gap between the arc-shaped connecting rod and the middle supporting rod is large, so it is identified that the misalignment of the wiring of the two rods is large, so it is determined that the connection tightness test is unqualified, and one or two rods need to be reinstalled and fixed;

[0101] S4, welding, the welding module performs welding on the set connection points;

[0102] The set connection points meet the welding connection standards;

[0103] S5. Remove the metal furniture after it has been welded and left to cool.

[0104] The metal furniture can be removed manually, or it can be removed after being clamped and fixed by a clamping module, or other handling tools can be used to remove the metal furniture from the placement rack.

[0105] Although the present invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the present invention. That is, the methods, systems and devices discussed above are examples. Various configurations may appropriately omit, replace or add various processes or components. For example, in alternative configurations, the method may be performed in an order different from the order described, and / or various components may be added, omitted and / or combined. Moreover, the features described with respect to certain configurations may be combined in various other configurations, such as different aspects and elements of the configurations may be combined in a similar manner. In addition, the elements therein may be updated as the technology develops, i.e., many elements are examples and do not limit the scope of the present disclosure or claims.

[0106] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including implementations. However, the configurations may be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary details to avoid obscuring the configurations. This description provides only example configurations and does not limit the scope, applicability, or configurations of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0107] In summary, it is intended that the above detailed description is considered to be illustrative rather than restrictive, and it should be understood that the above embodiments should be understood to be only used to illustrate the present invention and not to limit the scope of protection of the present invention. After reading the contents of the present invention, the technician can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. A metal furniture automatic assembly welding system, characterized in that: include: first mounting frame; A flip module, used to drive the first mounting frame to flip; A placement rack, arranged on the first mounting rack; A fixing module, arranged on the first mounting frame, for fixing the rods on the placement frame; A welding module, used for welding the rods on the placement rack; A detection module is used to collect rod installation information and welding execution information; A control module, which is respectively connected to the flip module, the welding module, and the detection module in communication, and is also used to send control instructions to each connected module; A clamping module is also provided, which is used to match and place the rods on the placement rack, and is also used to remove the finished products from the placement rack; The flip module includes a first motor, a transmission mechanism and a rotating mounting seat, wherein the first motor is arranged on the rotating mounting seat, and the first motor is connected to the first mounting frame through the transmission mechanism, thereby driving the first mounting frame to flip; The placement frame includes a first fixing frame, a second fixing frame, a third fixing frame and a top fixing frame, wherein the first fixing frame is used to place the right-angle support rod, the second fixing frame is used to place the middle support rod, the third fixing frame is used to place the arc-shaped connecting rod, and the top fixing frame is used to place the top rod; The fixing module includes a first fixing unit, a second fixing unit, a third fixing unit and a fourth fixing unit, wherein the first fixing unit is used to fix the arc-shaped connecting rod, the second fixing unit is used to fix the middle support rod, the third fixing unit is used to fix the top rod, and the fourth fixing unit is used to fix the right-angle support rod; The first fixing unit includes a first rotary pressing cylinder and a first clamping mechanism, and the second fixing unit includes a pressing cylinder; The first rotary downward-pressing cylinder comprises a driving cylinder mechanism and a first pressing rod, wherein the driving cylinder mechanism is mounted on a first mounting frame, the first pressing rod is arranged on the driving cylinder mechanism, and two limiting grooves are arranged on the first pressing rod, and the positions of the two limiting grooves respectively match the positions of the two arc-shaped connecting rods, so that after the first pressing rod is contracted and pressed, the two adjacent arc-shaped connecting rods can be limited and locked; The driving cylinder mechanism comprises a piston rod, a return spring, a touch block, a cylinder barrel, and a piston, the cylinder barrel being provided with an air chamber, an installation chamber, an air hole, and a first installation hole, the air chamber and the installation chamber being separated by a partition, the partition being provided with a second installation hole, the piston rod being slidably arranged on the first installation hole and the second installation hole, the piston being arranged in the air chamber and fixedly connected to the piston rod, the touch block being arranged in the installation chamber and fixedly connected to the piston rod, the installation chamber being provided with a first limiting seat and a second limiting seat, the first limiting seat being provided with a first moving groove, the second limiting seat being provided with a second moving groove, the touch block being provided with a first limiting sliding block portion and a second limiting sliding block portion, the first limiting sliding block portion being matched with the first moving groove, the second limiting sliding block portion being matched with the second moving groove, the return spring being arranged in the installation chamber and abutting against the piston, the outer end of the piston rod being fixedly connected to the first pressure rod, and the air hole being connected to the output end of the air pump through an air guide pipe; The first moving groove and the second moving groove are both provided with a sliding inclined portion and a position limiting lifting portion, wherein the sliding inclined portion is used for the position limiting sliding block portion to slide, and the position limiting lifting portion is used for only the position limiting sliding block portion to lift and lower.

2. The automatic assembly and welding system for metal furniture according to claim 1, characterized in that: The welding module includes a first mechanical arm and a welding gun. The welding gun is arranged on the first mechanical arm, and the first mechanical arm is used to drive the welding gun to move.

3. The automatic assembly and welding system for metal furniture as claimed in claim 2, characterized in that: The clamping module comprises a second mechanical arm and a clamping mechanism, wherein the clamping mechanism is arranged on the second mechanical arm and is used to clamp and fix the rod, and the second mechanical arm is used to drive the clamping mechanism to move.

4. The automatic assembly and welding system for metal furniture as claimed in claim 3, characterized in that: The detection module includes a first camera, a second camera and an analysis unit. The first camera is installed on the welding module, and the second camera is installed on a first mounting bracket. The analysis unit is used to compare and analyze the real-time image materials collected by the first camera and the second camera. At the same time, the analysis unit is communicatively connected with the control module.

5. The method for applying the metal furniture automatic assembly welding system according to claim 4 is characterized in that: include: S1, loading, placing the rods on each placement rack in matching order; The rods can be installed and placed on the rack by means of a clamping module or manually; The installation sequence is: first, place and install the right-angle support rod on the first fixing frame, lock it with the latch of the fourth fixing unit, then place and install the middle support rod and the top rod on the second fixing frame and the top mounting frame respectively, and finally install each arc-shaped connecting rod on the placement slot of each third fixing frame respectively, and at the same time, collect the scene information of the placement frame position through the second camera, so as to analyze and identify whether each rod has been placed and installed; S2, locking and fixing, controlling the fixing module to press and fix the rods on the placement rack; S3, detection, the detection module detects the connection tightness between the rods, and if the connection tightness between all the rods is qualified, the next process is carried out; The rods are irradiated by a ray device to form a first track line and a second track line on two adjacent rods respectively. The analysis unit analyzes and constructs the rod connection position contour line through the track line image information collected by the first camera, and analyzes the line misalignment between the first track line and the second track line. The pattern of the radiation device irradiating the plane is a line marking radiation with a plurality of mutually parallel straight lines; If the detected connection degree meets the requirements, the welding path is determined by the contour line of the rod connection position, and the welding module performs welding along the welding path; If the detected connection degree does not meet the requirements, feedback will be given through the control module to readjust the position of the rod; The specific method of determining the welding path through the contour line of the connecting position of the rods is as follows: the welding path is located at the midline position of the contour lines of the connecting positions of the two rods; S4, welding, the welding module performs welding on the set connection points; The connection points set therein meet the welding connection standards; The welding connection standard is: both ends of the arc-shaped connecting rod are connected to the right-angle support rod, the middle of the arc-shaped connecting rod is connected to the middle support rod, and both ends of the right-angle support rod are connected to the top rod; S5. Remove the metal furniture after it has been welded and left to cool.

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