A frame welding production line

Abstract

The present invention discloses a frame welding production line, comprising a frame welding device, a connecting rod conveying device, a rack rod conveying device and a discharging manipulator, wherein the frame welding device comprises a frame conveying device and two butt welding machines, wherein the frame conveying device is provided with a first loading position, a second loading position, a welding position and an output position in sequence along the conveying direction, wherein the connecting rod conveying device is used to convey the connecting rod to the first loading position, and the rack rod conveying device is used to convey the rack rod to the second loading position; the discharging manipulator is arranged corresponding to the output position, wherein the frame conveying device comprises a first frame and a conveying seat movably mounted on the first frame along the first frame and a welding driving mechanism for driving the conveying seat to convey on the first frame, and the two butt welding machines are arranged relatively on both sides of the welding position. The frame welding production line of the present invention can improve the efficiency of frame welding.

Description

Technical Field

[0001] The invention relates to the technical field of frame welding equipment, and in particular to a frame welding production line. Background Art

[0002] At present, most of the frame welding is performed by welding the frame through a welding device, but the existing welding device includes two butt welding machines arranged opposite to each other and a frame assembly table arranged between the two butt welding machines, after manually placing a number of connecting rods horizontally on the frame assembly table, two support rods are relatively longitudinally placed at both ends of the number of connecting rods to assemble an unconnected frame, and then the two butt welding machines butt weld the intersection of each connecting rod and the support rod to form a frame. However, the welding efficiency of the frame by this welding device is not only low, but also the manpower consumption is large. Summary of the invention

[0003] The purpose of the present invention is to provide a frame welding production line.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A frame welding production line comprises a frame welding device, a connecting rod conveying device, a rack rod conveying device and a discharging robot. The frame welding device comprises a frame conveying device and two butt welding machines. The frame conveying device is provided with a first loading position, a second loading position, a welding position and an output position in sequence along the conveying direction. The connecting rod conveying device is used to convey the connecting rod to the first loading position, and the rack rod conveying device is used to convey the rack rod to the second loading position; the discharging robot is arranged corresponding to the output position. The frame conveying device comprises a first frame and a conveying seat which can be movably mounted on the first frame along the first frame, and a welding driving mechanism for driving the conveying seat to convey on the first frame. The two butt welding machines are relatively arranged on both sides of the welding position.

[0006] As a further technical solution of the present invention: the conveying seat has three parts, namely, a loading conveying seat arranged between the first loading position and the second loading position, a feeding conveying seat arranged between the second loading position and the welding position, and a discharging conveying seat arranged between the welding position and the output position, so that under the drive of the welding drive mechanism, the loading conveying seat can convey back and forth between the first loading position and the second loading position, the feeding conveying seat can convey back and forth between the second loading position and the welding position, and the discharging conveying seat can convey back and forth between the welding position and the output position.

[0007] As a further technical solution of the present invention: a first connecting plate is provided between the loading conveying seat and the feeding conveying seat, and the two ends of the first connecting plate are relatively connected to the loading conveying seat and the feeding conveying seat; a second connecting plate is provided between the feeding conveying seat and the discharging conveying seat, and the two ends of the second connecting plate are relatively connected to the feeding conveying seat and the discharging conveying seat.

[0008] As a further technical solution of the present invention: the welding drive mechanism is arranged on one end of the first frame adjacent to the output position, and includes a driving screw rotatably arranged on the first frame and a driving motor for driving the driving screw to rotate. The driving screw is provided with a driving block that moves thereon as it rotates. The driving block is connected to the bottom end of the discharge conveyor seat, so that under the drive of the welding drive mechanism, the three conveyor seats are driven to move synchronously on the first frame.

[0009] As a further technical solution of the present invention: the connecting rod conveying device includes an alternating conveying mechanism and a connecting rod output mechanism, the alternating conveying mechanism is provided with a loading end and a picking end, the alternating conveying mechanism includes a second frame, an upper conveying mechanism and a lower conveying mechanism arranged on the second frame, the upper conveying mechanism and the lower conveying mechanism convey alternately back and forth between the loading end and the picking end along the second frame, so as to receive the connecting rod at the loading end and then convey it to the picking end; the connecting rod output mechanism is arranged between the picking end and the first loading position, and the connecting rod is conveyed from the picking end to the first loading position through the connecting rod output mechanism.

[0010] As a further technical solution of the present invention: the second frame is provided with two bracket bodies arranged opposite to each other, the upper conveying mechanism is arranged between the tops of the two bracket bodies, the upper conveying mechanism includes an upper conveying plate and a first driving mechanism, the upper conveying plate can be slidably arranged on the tops of the two bracket bodies, the first driving mechanism is used to drive the upper conveying plate to slide, and drive the upper conveying plate to transport back and forth between the loading end and the picking end; the lower conveying mechanism includes a lifting driving mechanism, a lower conveying plate and a second driving mechanism, the lifting driving mechanism can be slidably arranged between the middle parts of the two bracket bodies, the lower conveying plate is arranged on the lifting driving rod of the lifting driving mechanism, and the lower conveying plate is lifted and lowered by telescoping the lifting driving rod of the lifting driving mechanism, and the second driving mechanism is used to drive the lifting driving mechanism to slide, and drive the lower conveying plate to transport back and forth between the loading end and the picking end.

[0011] As a further technical solution of the present invention: the connecting rod output mechanism includes a first fixed frame, a connecting rod manipulator and a third driving mechanism. The first fixed frame is arranged between the material picking end and the first loading position. A first guide push rod is arranged on the top of the first fixed frame. The connecting rod manipulator can be movably arranged on the first guide push rod along the first guide push rod. The connecting rod manipulator is driven by the third driving mechanism to slide back and forth along the first guide push rod between the material picking end and the first loading position, so that the connecting rod manipulator transports the connecting rod from the material picking end to the first loading position.

[0012] As a further technical solution of the present invention: the rack rod conveying device includes a rack rod loading mechanism and a rack rod dividing mechanism, the rack rod loading mechanism includes a third body, a lifting structure, a receiving structure and a pushing mechanism, and a storage bin and a feeding platform are relatively provided at both ends of the third body, the lifting structure is arranged between the storage bin and the feeding platform, and the rack rods stored in the storage bin are output to the receiving structure through the lifting structure; the receiving structure is arranged on one end of the feeding platform adjacent to the lifting structure, and the rack rods are conveyed to the feeding platform through the receiving structure, and the pushing mechanism is arranged on one end of the feeding platform away from the lifting structure, and the two rack rods on the feeding platform are pushed to the rack rod dividing mechanism each time through the pushing mechanism.

[0013] As a further technical solution of the present invention: the rack rod material dividing mechanism includes a seat body, a clamp mechanism and a material dividing drive mechanism, and a feed position corresponding to the position of the pushing mechanism is provided on the top of the seat body; the clamp mechanism includes two groups of clamp assemblies arranged relatively on the top of the seat body, and the two ends of each clamp assembly are slidably arranged on the top of the seat body, and the pushing mechanism is pushed to the two support rods on the feed position each time through the two groups of clamp assemblies at the feed position; the material dividing drive mechanism is used to drive the two groups of clamp assemblies to slide relative to the two sides of the seat body.

[0014] As a further technical solution of the present invention: the rack rod conveying device includes a rack rod conveying mechanism, the rack rod conveying mechanism includes a second fixed frame, a rack rod manipulator and a fourth driving mechanism, the second fixed frame is mounted between the rack rod dividing mechanism and the second loading position, a second guide push rod is provided on the top of the second fixed frame, the rack rod manipulator can be movably arranged on the second guide push rod along the second guide push rod, and the rack rod manipulator is driven by the fourth driving mechanism to slide back and forth along the second guide push rod between the rack rod dividing mechanism and the second loading position, so that the rack rod manipulator conveys the rack rod from the rack rod dividing mechanism to the second loading position.

[0015] Compared with the prior art, the beneficial effect of the present invention is that the present invention proposes a frame welding production line which effectively improves the frame welding efficiency while reducing manpower consumption through the coordination among the frame welding device, the connecting rod conveying device, the rack rod conveying device and the discharging robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the frame welding production line.

[0017] Figure 2 Schematic diagram of the frame welding device.

[0018] Figure 3 A schematic diagram of a frame conveying device.

[0019] Figure 4 Schematic diagram of the connecting rod conveying device.

[0020] Figure 5 Schematic diagram of the alternating conveying mechanism.

[0021] Figure 6 Schematic diagram of the lower conveying mechanism.

[0022] Figure 7 A schematic diagram of a rack conveying device.

[0023] Figure 8 Schematic diagram of the rack loading mechanism.

[0024] Fig. 9 This is the structural diagram of the rack feeding mechanism.

[0025] Fig.10 It is a schematic diagram of the rack rod material distribution mechanism. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the protection scope of the present invention.

[0027] See also Figure 1 , Figure 2 and Figure 3 A frame welding production line includes a frame welding device 10, a connecting rod conveying device 20, a rack rod conveying device 30 and a discharging robot 40. The frame welding device 10 includes a frame conveying device 11 and two butt welding machines 12. The frame conveying device 11 is provided with a first loading position 101, a second loading position 102, a welding position 103 and an output position 104 in sequence along the conveying direction. The connecting rod conveying device 20 is used to convey the connecting rod to the first loading position 101, and the rack rod conveying device 30 is used to convey the rack rod to the second loading position 102; the discharging robot 40 is arranged corresponding to the output position 104, and the frame conveying device 11 includes a first frame 111 and a movable part 111 which can be movably installed on the first frame 111 along the first frame 111. The conveying seat 112 on the first frame 111 and the welding driving mechanism 113 for driving the conveying seat 112 to convey on the first frame 111, the two butt welding machines 12 are relatively arranged on both sides of the welding position 103, so that the conveying seat 112 is driven by the connecting driving mechanism to convey the connecting rod from the first loading position 101 to the second loading position 102, the connecting rod and the frame rod are assembled at the second loading position 102 to form an unconnected frame, and the unconnected frame is conveyed from the second loading position 102 to the welding position 103, and the two butt welding machines 12 are used to butt weld the intersection of each connecting rod and the frame rod to weld the frame into shape, and the frame after welding is conveyed from the welding position 103 to the output position 104, and the unloading robot 40 captures and outputs the frame on the output position 104.

[0028] Furthermore, the conveying seat 112 has three parts, namely, a loading conveying seat 1121 arranged between the first loading position 101 and the second loading position 102, a feeding conveying seat 1122 arranged between the second loading position 102 and the welding position 103, and a discharging conveying seat 1123 arranged between the welding position 103 and the output position 104, so that under the drive of the welding drive mechanism 113, the loading conveying seat 1121 can convey back and forth between the first loading position 101 and the second loading position 102, the feeding conveying seat 1122 can convey back and forth between the second loading position 102 and the welding position 103, and the discharging conveying seat 1123 can convey back and forth between the welding position 103 and the output position 104.

[0029] Furthermore, a first connecting plate 131 is provided between the loading conveying seat 1121 and the feeding conveying seat 1122, and the two ends of the first connecting plate 131 are relatively connected to the loading conveying seat 1121 and the feeding conveying seat 1122; a second connecting plate 132 is provided between the feeding conveying seat 1122 and the discharging conveying seat 1123, and the two ends of the second connecting plate 132 are relatively connected to the feeding conveying seat 1122 and the discharging conveying seat 1123. In addition, in this embodiment, the welding drive mechanism 113 is arranged on one end of the first frame 111 adjacent to the output position 104, and includes a driving screw 1131 rotatably arranged on the first frame 111 and a driving motor 1132 for driving the driving screw 1131 to rotate. The driving screw 1131 is provided with a driving block that moves thereon as it rotates, and the driving block is connected to the bottom end of the discharge conveying seat 1123, so that under the drive of the welding drive mechanism 113, the three conveying seats 112 are driven to move synchronously on the first frame 111.

[0030] Furthermore, a first bracket 141 is provided on the first loading position 101 to support the connecting rod; a second bracket 142 is provided on the second loading position 102 to support the bracket rod; a positioning assembly 143 is provided on the welding position 103 to position the unconnected frame; and a third bracket 144 is provided on the output position 104 to support the frame after welding.

[0031] For further information, see Figure 4 , Figure 5 and Figure 6The connecting rod conveying device 20 includes an alternating conveying mechanism 21 and a connecting rod output mechanism 22. The alternating conveying mechanism 21 is provided with a loading end 201 and a picking end 202. The alternating conveying mechanism 21 includes a second frame 211, an upper conveying mechanism 212 and a lower conveying mechanism 213 arranged on the second frame 211. The upper conveying mechanism 212 and the lower conveying mechanism 213 are alternately conveyed back and forth between the loading end 201 and the picking end 202 along the second frame 211, so that after the loading end 201 receives the connecting rod, it is conveyed to the picking end 202; the connecting rod output mechanism 22 is set between the picking end 202 and the first loading position 101, and the connecting rod is conveyed from the picking end 202 to the first loading position 101 through the connecting rod output mechanism 22.

[0032] Furthermore, the second frame 211 is provided with two bracket bodies 2111 arranged opposite to each other, the upper conveying mechanism 212 is arranged between the tops of the two bracket bodies 2111, the upper conveying mechanism 212 comprises an upper conveying plate 2121 and a first driving mechanism 2122, the upper conveying plate 2121 is slidably arranged on the tops of the two bracket bodies 2111, the first driving mechanism 2122 is used to drive the upper conveying plate 2121 to slide, and drive the upper conveying plate 2121 to convey back and forth between the feeding end 201 and the taking end 202; the lower conveying mechanism 21 3 comprises a lifting drive mechanism 2131, a lower conveying plate 2132 and a second drive mechanism 2133. The lifting drive mechanism 2131 is slidably disposed between the middle parts of the two bracket bodies 2111. The lower conveying plate 2132 is disposed on the lifting drive rod of the lifting drive mechanism 2131. The lifting drive rod of the lifting drive mechanism 2131 is extended and retracted to drive the lower conveying plate 2132 to rise and fall. The second drive mechanism 2133 is used to drive the lifting drive mechanism 2131 to slide, so as to drive the lower conveying plate 2132 to be conveyed back and forth between the feeding end 201 and the taking-out end 202.

[0033] Furthermore, the connecting rod output mechanism 22 includes a first fixed frame 221, a connecting rod manipulator 222 and a third driving mechanism 223. The first fixed frame 221 is mounted between the material picking end 202 and the first loading position 101. A first guide push rod 2211 is provided on the top of the first fixed frame 221. The connecting rod manipulator 222 can be movably arranged on the first guide push rod 2211 along the first guide push rod 2211. The connecting rod manipulator 222 is driven by the third driving mechanism 223 to slide back and forth along the first guide push rod 2211 between the material picking end 202 and the first loading position 101, so that the connecting rod manipulator 222 transports the connecting rod from the material picking end 202 to the first loading position 101.

[0034] For further information, see Figure 7 , Figure 8 and Fig. 9The rod conveying device 30 includes a rod loading mechanism 31, a rod dividing mechanism 32 and a rod conveying mechanism 33. The rod loading mechanism 31 includes a third body 311, a lifting structure 312, a receiving structure 313 and a pushing mechanism 314. A storage bin 315 and a feeding platform 316 are provided at both ends of the third body 311. The lifting structure 312 is arranged between the storage bin 315 and the feeding platform 316. The rods stored in the storage bin 315 are output to the receiving structure 313 through the lifting structure 312; the receiving structure 313 is arranged on one end of the feeding platform 316 adjacent to the lifting structure 312, and the rods are conveyed to the feeding platform 316 through the receiving structure 313. The pushing mechanism 314 is arranged on one end of the feeding platform 316 away from the lifting structure 312, and the two rods on the feeding platform 316 are pushed to the rod dividing mechanism 32 each time through the pushing mechanism 314.

[0035] For further information, see Fig.10 The rack material distribution mechanism 32 includes a base body 321, a clamp mechanism 322 and a material distribution driving mechanism 323. A feed position 3211 corresponding to the position of the pushing mechanism 314 is provided on the top of the base body 321; the clamp mechanism 322 includes two groups of clamp assemblies 3221 arranged opposite to each other on the top of the base body 321, and both ends of each clamp assembly 3221 are slidably arranged on the top of the base body 321. Through the two groups of clamp assemblies 3221 on the feed position 3211, the pushing mechanism 314 is pushed to the two support rods on the feed position 3211 each time; the material distribution driving mechanism 323 is used to drive the two groups of clamp assemblies 3221 to slide relative to the two sides of the base body 321.

[0036] Furthermore, the rack rod conveying mechanism 33 includes a second fixed frame 331, a rack rod manipulator 332 and a fourth driving mechanism 333, the second fixed frame 331 is mounted between the rack rod dividing mechanism 32 and the second loading position 102, and a second guide top rod 3311 is provided on the top of the second fixed frame 331, and the rack rod manipulator 332 can be movably arranged on the second guide top rod 3311 along the second guide top rod 3311, and the rack rod manipulator 332 is driven by the fourth driving mechanism 333 to slide back and forth along the second guide top rod 3311 between the rack rod dividing mechanism 32 and the second loading position 102, so that the rack rod manipulator 332 conveys the rack rod from the rack rod dividing mechanism 32 to the second loading position 102.

[0037] The present invention provides a frame welding method for a frame welding production line, comprising the following steps:

[0038] Step 1: The connecting rod conveying device 20 conveys the connecting rod to the first loading position 101. Specifically, the connecting rod is loaded at the loading end 201 of the alternating conveying mechanism 21. The upper conveying mechanism 212 and the lower conveying mechanism 213 convey the connecting rod alternately back and forth between the loading end 201 and the picking end 202 along the second frame 211. After the connecting rod is conveyed to the picking end 202, the third driving mechanism 223 drives the connecting rod manipulator 222 to slide back and forth between the picking end 202 and the first loading position 101 along the first guide push rod 2211, and the connecting rod manipulator 222 conveys the connecting rod from the picking end 202 to the first loading position 101;

[0039] Step 2: The loading conveying seat 1121 conveys the connecting rod from the first loading position to the second loading position 102, and the rack rod conveying device 30 conveys the rack rod to the second loading position 102. Specifically, the lifting structure 312 outputs the rack rod stored in the storage bin 315 to the receiving structure 313, and the receiving structure 313 conveys the rack rod to the feeding platform 316. The pushing mechanism 314 pushes the two rack rods on the feeding platform 316 to the rack rod dividing mechanism 32 each time. The pushing mechanism 314 pushes the two bracket rods on the feeding position 3211 each time through the two sets of clamp assemblies 32 21 support, the material distribution drive mechanism 323 drives the two sets of clamp assemblies 3221 to slide relatively toward the two sides of the seat body 321, and the fourth drive mechanism 333 drives the rack rod manipulator 332 to slide back and forth between the rack rod distribution mechanism 32 and the second loading position 102 along the second guide push rod 3311, so that the rack rod manipulator 332 transports the two rack rods that slide to the two sides of the seat body 321 from the rack rod distribution mechanism 32 to the second loading position 102, so that two support rods are relatively placed longitudinally at both ends of the plurality of connecting support rods, and are assembled into an unconnected frame on the second loading position 102;

[0040] Step 3: The feeding and conveying seat 1122 conveys the unconnected frame from the second loading position 102 to the welding position 103, and two welding machines 12 weld each connecting rod and the frame rod to weld the frame into shape;

[0041] Step 4: The unloading conveying seat 1123 conveys the welded frame from the welding position 103 to the output position 104, and the unloading robot 40 captures the frame on the output position 104 for output.

[0042] In summary, a frame welding production line of the present invention effectively improves the efficiency of frame welding while reducing manpower consumption through the coordination among the frame welding device 10, the connecting rod conveying device 20, the rack rod conveying device 30 and the discharging robot 40.

[0043] As long as it does not violate the creative ideas of the present invention, any combination of the various embodiments of the present invention shall be regarded as the contents disclosed by the present invention; within the technical concept of the present invention, any combination of various simple modifications of the technical scheme and different embodiments that does not violate the creative ideas of the present invention shall be within the protection scope of the present invention.

Claims

1. A frame welding production line, characterized in that: The invention comprises a frame welding device (10), a connecting rod conveying device (20), a rack rod conveying device (30) and a discharging robot (40), wherein the frame welding device (10) comprises a frame conveying device (11) and two butt welding machines (12), wherein the frame conveying device (11) is provided with a first loading position (101), a second loading position (102), a welding position (103) and an output position (104) in sequence along a conveying direction, wherein the connecting rod conveying device (20) is used to convey the connecting rod to the first loading position (101), and the rack rod conveying device (30) is used to convey the connecting rod to the first loading position (101). The conveying device (30) is used to convey the frame rod to the second loading position (102); the discharging robot (40) is arranged corresponding to the output position (104); the frame conveying device (11) includes a first frame (111) and a conveying seat (112) that can be movably installed on the first frame (111) along the first frame (111) and a welding drive mechanism (113) used to drive the conveying seat (112) to convey on the first frame (111); two welding machines (12) are relatively arranged on both sides of the welding position (103); The conveying seat (112) comprises three parts, namely a loading conveying seat (1121) arranged between the first loading position (101) and the second loading position (102), a feeding conveying seat (1122) arranged between the second loading position (102) and the welding position (103), and a discharging conveying seat (1123) arranged between the welding position (103) and the output position (104), so that under the drive of the welding drive mechanism (113), the loading conveying seat (1121) can be transported back and forth between the first loading position (101) and the second loading position (102), the feeding conveying seat (1122) can be transported back and forth between the second loading position (102) and the welding position (103), and the discharging conveying seat (1123) can be transported back and forth between the welding position (103) and the output position (104); A first connecting plate (131) is provided between the loading conveying seat (1121) and the feeding conveying seat (1122), and two ends of the first connecting plate (131) relatively connect the loading conveying seat (1121) and the feeding conveying seat (1122); a second connecting plate (132) is provided between the feeding conveying seat (1122) and the discharging conveying seat (1123), and two ends of the second connecting plate (132) relatively connect the feeding conveying seat (1122) and the discharging conveying seat (1123); The connecting rod conveying device (20) comprises an alternating conveying mechanism (21) and a connecting rod output mechanism (22); the alternating conveying mechanism (21) is provided with a loading end (201) and a retrieving end (202); the alternating conveying mechanism (21) comprises a second frame (211), an upper conveying mechanism (212) and a lower conveying mechanism (213) arranged on the second frame (211); the upper conveying mechanism (212) and the lower conveying mechanism (213) are arranged along the second frame (211) to convey the connecting rod back and forth between the loading end (201) and the retrieving end (202) in an alternating manner, so that after the loading end (201) receives the connecting rod, it is conveyed to the retrieving end (202); the connecting rod output mechanism (22) is arranged between the retrieving end (202) and the first loading position (101), and the connecting rod is conveyed from the retrieving end (202) to the first loading position (101) through the connecting rod output mechanism (22); The second frame (211) is provided with two bracket bodies (2111) arranged opposite to each other. The upper conveying mechanism (212) is arranged between the tops of the two bracket bodies (2111). The upper conveying mechanism (212) comprises an upper conveying plate (2121) and a first driving mechanism (2122). The upper conveying plate (2121) is slidably arranged on the tops of the two bracket bodies (2111). The first driving mechanism (2122) is used to drive the upper conveying plate (2121) to slide, thereby driving the upper conveying plate (2121) to transport back and forth between the loading end (201) and the taking end (202). The lower conveying mechanism (213) comprises an upper conveying plate (2121) and a first driving mechanism (2122). The lifting mechanism (2131) comprises a lifting drive mechanism (2131), a lower conveying plate (2132) and a second drive mechanism (2133), wherein the lifting drive mechanism (2131) is slidably disposed between the middle parts of the two support bodies (2111), the lower conveying plate (2132) is disposed on a lifting drive rod of the lifting drive mechanism (2131), and the lifting drive rod of the lifting drive mechanism (2131) is extended and retracted to drive the lower conveying plate (2132) to rise and fall, and the second drive mechanism (2133) is used to drive the lifting drive mechanism (2131) to slide, thereby driving the lower conveying plate (2132) to be conveyed back and forth between the loading end (201) and the taking end (202); The connecting rod output mechanism (22) comprises a first fixed frame (221), a connecting rod manipulator (222) and a third driving mechanism (223); the first fixed frame (221) is mounted between the material taking end (202) and the first material loading position (101); a first guide push rod (2211) is provided on the top of the first fixed frame (221); the connecting rod manipulator (222) can be movably arranged on the first guide push rod (2211) along the first guide push rod (2211); the third driving mechanism (223) drives the connecting rod manipulator (222) to slide back and forth between the material taking end (202) and the first material loading position (101) along the first guide push rod (2211); and the connecting rod manipulator (222) transports the connecting rod from the material taking end (202) to the first material loading position (101); The rack rod conveying device (30) comprises a rack rod feeding mechanism (31) and a rack rod distributing mechanism (32), the rack rod feeding mechanism (31) comprising a third body (311), a lifting structure (312), a material receiving structure (313) and a pushing mechanism (314), a material storage bin (315) and a material feeding platform (316) are provided at two ends of the third body (311) opposite to each other, the lifting structure (312) is arranged between the material storage bin (315) and the material feeding platform (316), and the material storage bin (315) is fed into the material storage bin (316) by the lifting structure (312). The rack rods in the material storage bin (315) are output to the material receiving structure (313); the material receiving structure (313) is arranged on one end of the material feeding platform (316) adjacent to the material lifting structure (312), and the rack rods are transported to the material feeding platform (316) through the material receiving structure (313); the pushing mechanism (314) is arranged on one end of the material feeding platform (316) away from the material lifting structure (312), and the two rack rods on the material feeding platform (316) are pushed to the rack rod distributing mechanism (32) each time through the pushing mechanism (314).

2. The frame welding production line according to claim 1 is characterized in that: The welding drive mechanism (113) is arranged on one end of the first frame (111) adjacent to the output position (104), and comprises a driving screw (1131) rotatably arranged on the first frame (111) and a driving motor (1132) for driving the driving screw (1131) to rotate. The driving screw (1131) is provided with a driving block that moves thereon as it rotates, and the driving block is connected to the bottom end of the discharge conveying seat (1123), so that under the drive of the welding drive mechanism (113), the three conveying seats (112) are driven to move synchronously on the first frame (111).

3. The frame welding production line according to claim 1 is characterized in that: The rod material distribution mechanism (32) comprises a seat body (321), a clamp mechanism (322) and a material distribution driving mechanism (323); a material feed position (3211) corresponding to the position of the push mechanism (314) is provided on the top of the seat body (321); the clamp mechanism (322) comprises two groups of clamp assemblies (3221) arranged opposite to each other on the top of the seat body (321); both ends of each clamp assembly (3221) are slidably arranged on the top of the seat body (321); the two groups of clamp assemblies (3221) are supported on the two support rods on the material feed position (3211) each time the push mechanism (314) is pushed; and the material distribution driving mechanism (323) is used to drive the two groups of clamp assemblies (3221) to slide relative to each other on the two sides of the seat body (321).

4. The frame welding production line according to claim 1 is characterized in that: The rack rod conveying device (30) comprises a rack rod conveying mechanism (33), wherein the rack rod conveying mechanism (33) comprises a second fixed frame (331), a rack rod manipulator (332) and a fourth driving mechanism (333); the second fixed frame (331) is mounted between the rack rod material distribution mechanism (32) and the second material loading position (102); a second guide top rod (3311) is provided on the top of the second fixed frame (331); the rack rod manipulator (332) can be movably arranged on the second guide top rod (3311) along the second guide top rod (3311); the rack rod manipulator (332) is driven by the fourth driving mechanism (333) to slide back and forth along the second guide top rod (3311) between the rack rod material distribution mechanism (32) and the second material loading position (102), so that the rack rod manipulator (332) transports the rack rod from the rack rod material distribution mechanism (32) to the second material loading position (102).

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