Rack processing device and processing method

Abstract

The application discloses a rack processing device and a processing method, wherein the rack processing device comprises an upper cross beam positioning assembly fixed to the rack, the upper cross beam positioning assembly comprises at least two first positioning seats, and a positioning surface for positioning an upper cross beam is formed on the first positioning seat; a lower cross beam positioning assembly fixed to the rack, the lower cross beam positioning assembly comprises at least two second positioning seats, and a positioning surface for positioning a lower cross beam is formed on the second positioning seat; an upper assembly hole positioning assembly comprising a first fixing seat and a first fixing pin, a groove for positioning an upper cross beam assembly plate is formed on the first fixing seat; and a lower assembly hole positioning assembly comprising a second fixing seat and a second fixing pin, a groove for positioning a lower cross beam assembly plate is formed on the second fixing seat. The application has the effect of improving the production efficiency during rack processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural machinery frame processing, in particular to a frame processing device and a processing method. BACKGROUND

[0002] The large square bale baler is mainly used for automatic picking and bundling of straw of corn, rice, wheat, reed, sugarcane, alfalfa and other crops, mainly composed of a frame, a transmission system, a picking and chopping system, a feeding system, a compression system, a knotting system, a baling system, an electro-hydraulic control system, a chassis walking system and the like. The frame is the skeleton of the large square bale baler body, and the machining precision of the frame directly affects the reliable operation of other systems during the manufacturing process. Therefore, high-precision and high-efficiency processing methods are required to meet the batch production of agricultural machinery manufacturing enterprises.

[0003] As a tractor-type agricultural machine, in order to reduce the traction weight of the main machine, the frame body adopts a thin-walled welded steel structure, and the frame body is composed of a left frame welding assembly, a right frame welding assembly and a beam welding assembly. Figure 1 As shown in the drawings, the frame body is mainly composed of a left frame welding assembly, a right frame welding assembly and a beam welding assembly. The current frame processing scheme is that the laser cutting is used for the thin plate parts, and the integral assembly welding process is used for welding after the sub-components are formed. Although the welding process can effectively improve the processing efficiency of the frame, it cannot guarantee the processing precision.

[0004] The main problems are as follows: The large square bale baler is an external power input device, and the transfer case is a core component for distributing and outputting power in the transmission system. The assembly precision and reliability of the transfer case determine the operation stability of the equipment. The two assembly holes of the transfer case are integrally processed on the shell of the transfer case on the upper and lower beams of the beam welding assembly, and the beam welding assembly is composed of independent upper and lower beam assemblies as shown in the drawings. Figure 2 and 3 As shown in the drawings, the assembly hole position of the transfer case has high requirements on the size precision of the beam welding assembly hole position, and the welding process cannot guarantee the size precision. At the same time, the welding size has dispersion, and a large amount of time is required for repeated grinding operation and assembly in the later assembly process. The labor intensity of the operator is high, the efficiency is low, and it is difficult to be applied on a large scale. If the frame is integrally welded and formed and then bored and milled, a large boring and milling equipment must be used. Due to the limitation of the processing position space, the workpiece needs to be clamped multiple times, the processing cost is high, and the overall processing efficiency of the frame is affected. SUMMARY

[0005] The present application provides a frame processing device and a processing method to solve the technical problem of low production efficiency in the existing frame processing.

[0006] According to one aspect of the present application, a rack processing device is provided, comprising a welding machine device, the welding machine device comprising: an upper beam positioning assembly fixed to the rack, the upper beam positioning assembly comprising at least two first positioning seats, each first positioning seat having a positioning surface for positioning an upper beam; a lower beam positioning assembly fixed to the rack, the lower beam positioning assembly comprising at least two second positioning seats, each second positioning seat having a positioning surface for positioning a lower beam, the positioning surfaces of the first and second positioning seats cooperating to make the upper beam parallel to the lower beam; an upper assembly hole positioning assembly comprising a first fixing seat and a first fixing pin, the first fixing seat having a groove for positioning an upper beam assembly plate, the first fixing pin being arranged to pass through a bottom hole of an assembly hole of the upper beam assembly plate to position the upper beam; and a lower assembly hole positioning assembly comprising a second fixing seat and a second fixing pin, the second fixing seat having a groove for positioning a lower beam assembly plate, the second fixing pin being arranged to pass through a bottom hole of an assembly hole of the lower beam assembly plate to position the lower beam, the first and second fixing seats being detachably connected to the rack.

[0007] Optionally, the rack processing device further comprises a support fixing device, the support fixing device comprising a positioning frame, the first end of the positioning frame being provided with a positioning surface corresponding to the upper beam and an upper pressing plate for pressing the upper beam, and the second end of the positioning frame being provided with a positioning surface corresponding to the lower beam and a lower pressing plate for pressing the lower beam.

[0008] Optionally, the upper beam positioning assembly further comprises an upper positioning rod and an upper pressing plate, the upper positioning rod passing through the upper pressing plate and cooperating with a reserved hole of the upper beam.

[0009] Optionally, the lower beam positioning assembly further comprises a lower pressing plate, the lower pressing plate and the second positioning seat together forming a closed ring surrounding the lower beam.

[0010] Optionally, the rack is provided with a first reference surface and a second reference surface perpendicular to each other, the first fixing seat being fixed to the first reference surface by bolts, and the second fixing seat being fixed to the second reference surface by bolts.

[0011] Optionally, the lower pressing plate is connected to the second positioning seat by bolts, the lower pressing plate being threadedly connected with a locking bolt, the locking bolt being arranged to abut against the lower beam.

[0012] According to another aspect of the present application, a rack processing method is also provided, comprising the following steps:

[0013] S1, installing an upper beam, a lower beam, an upper beam assembly plate and a lower beam assembly plate to the welding machine device, so that the positions of the parts reach the design positioning dimensions;

[0014] S2, marking lines on the upper cross beam according to the relative position between the upper cross beam positioning assembly and the upper cross beam, and marking lines on the lower cross beam according to the relative position between the lower cross beam positioning assembly and the lower cross beam;

[0015] S3, dismounting the upper cross beam, the lower cross beam, the upper cross beam assembly plate and the lower cross beam assembly plate from the welding fixture, and welding the upper cross beam and the lower cross beam;

[0016] S4, dismounting the upper assembly hole positioning assembly and the lower assembly hole positioning assembly on the welding fixture, and mounting the upper cross beam and the lower cross beam on the welding fixture according to the marked lines;

[0017] S5, machining the assembly holes of the upper cross beam assembly plate and the lower cross beam assembly plate on the welding fixture.

[0018] Further, after step S5, the following steps are further included:

[0019] S6, connecting the support fixing device with the upper cross beam and the lower cross beam on the welding fixture;

[0020] S7, dismounting the welding fixture, and welding the upper cross beam and the lower cross beam fixed on the support fixing device with the vehicle frame assembly.

[0021] Optionally, in step 1, before mounting the upper cross beam, the lower cross beam, the upper cross beam assembly plate and the lower cross beam assembly plate on the welding fixture, first machining the assembly hole bottom hole on the upper cross beam assembly plate and the lower cross beam assembly plate.

[0022] Optionally, in step S2, using a marking needle to mark lines on the upper cross beam and the lower cross beam.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] By setting the upper cross beam positioning assembly and the lower cross beam positioning assembly, the upper cross beam and the lower cross beam can be positioned respectively, by setting the upper assembly hole positioning assembly and the lower assembly hole positioning assembly, the upper cross beam can be positioned by the bottom hole of the upper assembly hole on the upper cross beam assembly plate, and the lower cross beam can be positioned by the bottom hole of the lower assembly hole on the lower cross beam assembly plate, the position of the upper cross beam and the lower cross beam on the welding fixture is determined according to the bottom hole of the assembly hole, which can improve the assembly precision;

[0025] Before finishing the assembly hole, first mounting the upper cross beam and the lower cross beam on the welding fixture, and marking lines on the upper cross beam and the lower cross beam, when the upper cross beam and the lower cross beam are mounted for the second time, the position can be according to the marked lines, so that the position of the upper cross beam and the lower cross beam on the welding fixture is consistent when mounted for the first time and for the second time, which can improve the position precision of the upper assembly hole and the lower assembly hole on the upper cross beam and the lower cross beam;

[0026] After positioning and installing the upper cross beam and the lower cross beam with assembled holes to the welding machine assembly, the supporting and fixing device is connected with the upper cross beam and the lower cross beam on the welding machine assembly, and then the welding machine assembly is removed, the supporting and fixing device serves as the support for the welding of the upper cross beam and the lower cross beam to the rack assembly process, which can guarantee the position accuracy of the upper cross beam and the lower cross beam, and further make the position accuracy of the assembled holes on the upper cross beam and the lower cross beam higher, without the need of regrinding after welding, and the processing efficiency is higher; meanwhile, the upper cross beam and the lower cross beam can be split and then the assembled holes are finished, without the need of large boring and milling equipment for multiple times of clamping, and the overall processing efficiency is also improved.

[0027] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide further understanding of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0029] Figure 1 is a structural schematic diagram of the welding machine assembly of the preferred embodiment of the present application;

[0030] Figure 2 is a structural schematic diagram of the upper cross beam and the lower cross beam;

[0031] Figure 3 is a size requirement schematic diagram of the upper cross beam and the lower cross beam;

[0032] Figure 4 is a schematic diagram of the upper cross beam and the lower cross beam installed on the welding machine assembly;

[0033] Figure 5 is a structural schematic diagram of the supporting and fixing device of the preferred embodiment of the present application;

[0034] Figure 6 is a structural schematic diagram of the welding machine assembly of the preferred embodiment of the present application after the removal of the upper assembled hole positioning assembly and the lower assembled hole positioning assembly;

[0035] Figure 7 is a schematic diagram of the connection of the supporting and fixing device of the preferred embodiment of the present application with the upper cross beam and the lower cross beam on the welding machine assembly.

[0036] LEGEND:

[0037] 1. Upper crossbeam; 2. Lower crossbeam; 3. Welding and machining device; 31. Frame; 32. First positioning seat; 33. Second positioning seat; 34. First fixed seat; 35. First fixing pin; 36. Second fixed seat; 37. Second fixing pin; 38. Upper pressure plate; 39. Lower pressure plate; 4. Support and fixing device; 41. Positioning frame; 42. Upper pressure plate; 43. Lower pressure plate; 5. Assembly hole; 6. Lifting lug. Detailed Implementation

[0038] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0039] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0040] This application discloses a frame processing apparatus and processing method.

[0041] Reference Figure 1 The frame processing device includes a welding machining device 3, which includes a frame 31, an upper crossbeam positioning assembly, a lower crossbeam positioning assembly, an upper assembly hole positioning assembly, and a lower assembly hole positioning assembly.

[0042] The upper crossbeam positioning assembly is fixed to the frame and includes at least two first positioning seats 32, each with a positioning surface for positioning the upper crossbeam 1. The lower crossbeam positioning assembly is also fixed to the frame and includes at least two second positioning seats 33, each with a positioning surface for positioning the lower crossbeam 2. The positioning surfaces mate to make the upper crossbeam 1 and the lower crossbeam 2 parallel. The upper mounting hole positioning assembly includes a first fixing seat 34 and a first fixing pin 35. The seat 34 has a groove for positioning the upper crossbeam assembly plate. The first fixing pin 35 is used to pass through the bottom hole of the assembly hole 5 of the upper crossbeam assembly plate to position the upper crossbeam 1. The lower assembly hole positioning assembly includes a second fixing seat 36 and a second fixing pin 37. The second fixing seat 36 has a groove for positioning the lower crossbeam assembly plate. The second fixing pin 37 is used to pass through the bottom hole of the assembly hole 5 of the lower crossbeam assembly plate to position the lower crossbeam 2. Both the first fixing seat 34 and the second fixing seat 36 are detachably connected to the frame.

[0043] Reference Figure 2 , Figure 3 and Figure 4In a specific embodiment, the frame of the large square bale baler vehicle body is taken as an example, which is mainly composed of a left frame welding assembly, a right frame welding assembly and a crossbeam welding assembly, and the crossbeam welding assembly includes an upper crossbeam 1 and a lower crossbeam 2. The upper crossbeam 1 is provided with an upper crossbeam assembly plate, and the lower crossbeam 2 is provided with a lower crossbeam assembly plate. The upper crossbeam assembly plate and the lower crossbeam assembly plate are respectively provided with device holes. The size accuracy of the two sets of assembly holes 5 is extremely high, which directly affects the installation accuracy of the transfer case. In this embodiment, before finishing the assembly holes 5, the upper crossbeam 1 is first installed on the upper crossbeam positioning assembly, and the lower crossbeam 2 is installed on the lower crossbeam positioning assembly. The upper assembly hole positioning assembly is used for positioning the bottom hole of the upper crossbeam assembly plate assembly hole 5, and the lower assembly hole positioning assembly is used for positioning the bottom hole of the lower crossbeam assembly plate assembly hole 5. The positions of the upper crossbeam 1 and the lower crossbeam 2 are fine-tuned through the bottom hole of the assembly hole 5, and then the upper crossbeam 1 and the lower crossbeam 2 are fixed through the upper crossbeam positioning assembly and the lower crossbeam positioning assembly. After being fixed, the upper crossbeam 1 and the lower crossbeam 2 can be marked. The purpose of marking is to mark the relative position of the upper crossbeam 1 and the upper crossbeam positioning assembly and the relative position of the lower crossbeam 2 and the lower crossbeam positioning assembly, so as to facilitate the auxiliary positioning when the upper crossbeam 1 and the lower crossbeam 2 are disassembled from the welding machine assembly device 3 and assembled to the welding machine assembly device 3 for the second time after the assembly holes 5 are finished. The positions of the upper crossbeam 1 and the lower crossbeam 2 are consistent when the upper crossbeam 1 and the lower crossbeam 2 are installed to the welding machine assembly device 3 for the second time. The first fixing seat 34 and the second fixing seat 36 are detachably connected with the frame, so that the upper assembly hole positioning assembly and the lower assembly hole positioning assembly do not interfere with the subsequent process after the upper crossbeam 1 and the lower crossbeam 2 are installed to the welding machine assembly device 3 for the second time.

[0044] Referring to Figure 5 , the frame machining device further includes a support fixing device 4, and the support fixing device 4 includes a positioning frame 41. A first end of the positioning frame 41 is provided with a positioning surface corresponding to the upper crossbeam 1 and an upper pressing plate 42 for pressing the upper crossbeam 1. A second end of the positioning frame 41 is provided with a positioning surface corresponding to the lower crossbeam 2 and a lower pressing plate 43 for pressing the lower crossbeam 2. The upper pressing plate 42 and the lower pressing plate 43 are respectively fixed on the positioning frame 41 by bolts.

[0045] Referring to Figure 6 and Figure 7In this embodiment, after the upper crossbeam 1 and lower crossbeam 2 are installed onto the welding machining device 3 for the second time, the support and fixing device 4 can be connected to the upper crossbeam 1 and lower crossbeam 2 on the welding machining device 3, so that the positions of the upper crossbeam 1 and lower crossbeam 2 will not change after the welding frame device is removed. This is because if the welding frame device is used directly for support during the welding of the crossbeam welding assembly to the left and right vehicle frame welding assemblies, the welding frame device would be too large and prone to interference with other devices. Furthermore, once the crossbeam welding assembly is welded to the left and right vehicle frame welding assemblies, the frame welding device would be difficult to disassemble. Therefore, the support and fixing device 4 is used for support.

[0046] The upper crossbeam positioning assembly also includes an upper positioning rod and an upper clamping plate 38. The upper positioning rod passes through the upper clamping plate 38 and engages with a pre-drilled hole in the upper crossbeam 1. After the upper crossbeam 1 is installed on the upper crossbeam positioning assembly, locking the upper positioning rod will press the upper crossbeam 1 against the first positioning seat 32. Optionally, the upper positioning rod is threadedly connected to the first positioning seat 32.

[0047] The lower crossbeam positioning assembly also includes a lower clamping plate 39, which together with the second positioning seat 33 forms a closed ring around the lower crossbeam 2. After the lower crossbeam 2 is installed into the second positioning seat 33, the lower clamping plate 39 is pressed onto the lower crossbeam 2, and both ends of the lower clamping plate 39 are locked onto the second positioning seat 33 by bolts.

[0048] The frame is provided with a first reference plane and a second reference plane that are perpendicular to each other. The first fixed seat 34 is fixed to the first reference plane by bolts, and the second fixed seat 36 is fixed to the second reference plane by bolts. The first fixed seat 34 is provided with a plane corresponding to the first reference plane, and the second fixed seat 36 is provided with a plane corresponding to the second reference plane, so that the upper assembly hole positioning assembly and the lower assembly hole positioning assembly can maintain high accuracy during repeated assembly and disassembly.

[0049] The lower clamping plate 39 is connected to the second positioning seat 33 by bolts. A locking bolt is threaded onto the lower clamping plate 39, which is used to press against the lower crossbeam 2. After the lower crossbeam 2 is installed onto the second positioning seat 33, the lower clamping plate 39 is installed first. The lower clamping plate 39 and the second positioning seat 33 form a ring around the lower crossbeam 2 to position the lower crossbeam 2. Then, the locking bolt on the lower clamping plate 39 is tightened. The locking bolt contacts the lower crossbeam 2 and presses the lower crossbeam 2 against the second positioning seat 33.

[0050] This embodiment also discloses a frame processing method, including the following steps:

[0051] S1, install the upper cross beam 1, the lower cross beam 2, the upper cross beam assembly plate, and the lower cross beam assembly plate to the welding jig device 3, so that the positions of the parts reach the design positioning dimensions;

[0052] S2, mark lines on the upper cross beam 1 according to the relative position of the upper cross beam positioning assembly and the upper cross beam 1, and mark lines on the lower cross beam 2 according to the relative position of the lower cross beam positioning assembly and the lower cross beam 2;

[0053] S3, dismount the upper cross beam 1, the lower cross beam 2, the upper cross beam assembly plate, and the lower cross beam assembly plate from the welding jig device 3, and perform welding forming on the upper cross beam 1 and the lower cross beam 2;

[0054] S4, dismount the upper assembly hole positioning assembly and the lower assembly hole positioning assembly on the welding jig device 3, and install the upper cross beam 1 and the lower cross beam 2 on the welding jig device 3 again according to the marked line positions;

[0055] S5, process the assembly holes of the upper cross beam assembly plate and the assembly holes of the lower cross beam assembly plate on the machine tool with the welding jig device 3 as the tooling.

[0056] S6, connect the support fixing device 4 with the upper cross beam 1 and the lower cross beam 2 on the welding jig device 3; the support fixing device 4 can be provided in multiple groups in parallel to ensure that the upper cross beam 1 and the lower cross beam 2 can maintain balance and will not tilt.

[0057] S7, dismount the welding jig device 3, and weld the upper cross beam 1 and the lower cross beam 2 fixed under the support fixing device 4 with the vehicle frame assembly.

[0058] Referring to Figure 3 In step S1, the upper assembly hole positioning assembly is assembled on the upper cross beam positioning assembly, and the lower assembly hole positioning assembly is assembled on the lower cross beam positioning assembly. The upper cross beam positioning assembly and the lower cross beam positioning assembly can respectively position the upper cross beam 1 and the lower cross beam 2, and through the setting of the upper assembly hole positioning assembly and the lower assembly hole positioning assembly, the bottom hole of the upper assembly hole on the upper cross beam assembly plate can be used to position the upper cross beam 1, and the bottom hole of the lower assembly hole on the lower cross beam assembly plate can be used to position the lower cross beam 2. The cross beam welding assembly jig device 3 is used for riveting positioning and assembly of the upper cross beam 1 and the lower cross beam 2. Figure 5 As shown in the figure, the positioning dimensions C0, D0, E0, F0, and G0 are ensured Figure 2 As shown in the figure.

[0059] In step 1, before the upper cross beam 1, the lower cross beam 2, the upper cross beam assembling plate and the lower cross beam assembling plate are installed on the welding machine 3, the assembling hole bottom holes are first pre-processed on the upper cross beam assembling plate and the lower cross beam assembling plate. The upper cross beam 1 is clamped and positioned, the right angle surface of the first positioning seat 32 is used for positioning, and the two bottom holes of the upper cross beam 1 are penetrated by a screw rod for pressing. The lower cross beam 2 is clamped and positioned, the right angle surface of the U-shaped groove of the second positioning seat 33 is used as a reference, and a pressing plate is used for pressing.

[0060] In step S2, the scribe is used to draw lines on the upper cross beam 1 and the lower cross beam 2 to ensure that the lines are clear and do not fade.

[0061] In order to avoid interference between the upper cross beam 1 lifting lug 6 and the main shaft or accessories of the machine tool during the machining process, riveting and welding are not performed during the assembly welding of the upper cross beam 1, and welding is performed again during the overall assembly welding of the rack.

[0062] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A frame processing device, characterized in that, It includes a welding machining device (3), which includes a frame (31); The upper crossbeam positioning assembly is fixed on the frame (31). The upper crossbeam positioning assembly includes at least two first positioning seats (32), and the first positioning seats (32) have positioning surfaces for positioning the upper crossbeam (1). The lower crossbeam positioning assembly is fixed on the frame (31). The lower crossbeam positioning assembly includes at least two second positioning seats (33). The second positioning seats (33) have positioning surfaces for positioning the lower crossbeam (2). The positioning surfaces cooperate with each other to make the upper crossbeam (1) and the lower crossbeam (2) parallel. The upper mounting hole positioning assembly includes a first fixing seat (34) and a first fixing pin (35). The first fixing seat (34) has a groove for positioning the upper crossbeam mounting plate, and the first fixing pin (35) is used to pass through the bottom hole of the mounting hole of the upper crossbeam mounting plate to position the upper crossbeam (1). The lower assembly hole positioning assembly includes a second fixing seat (36) and a second fixing pin (37). The second fixing seat (36) has a groove for positioning the lower crossbeam assembly plate. The second fixing pin (37) is used to pass through the bottom hole of the assembly hole of the lower crossbeam assembly plate to position the lower crossbeam (2). The first fixing seat (34) and the second fixing seat (36) are both detachably connected to the frame (31). The frame processing device also includes a support and fixing device (4), which includes a positioning frame (41). The first end of the positioning frame (41) is provided with a positioning surface corresponding to the upper crossbeam (1) and an upper pressure plate (42) for pressing the upper crossbeam (1). The second end of the positioning frame (41) is provided with a positioning surface corresponding to the lower crossbeam (2) and a lower pressure plate (43) for pressing the lower crossbeam (2). The lower crossbeam positioning assembly also includes a lower clamping plate (39), which together with the second positioning seat (33) forms a closed ring around the lower crossbeam (2); The frame (31) is provided with a first reference plane and a second reference plane that are perpendicular to each other. The first fixed seat (34) is fixed to the first reference plane by bolts, and the second fixed seat (36) is fixed to the second reference plane by bolts.

2. The frame processing device according to claim 1, characterized in that, The upper beam positioning assembly also includes an upper positioning rod and an upper clamping plate (38). The upper positioning rod passes through the upper clamping plate (38) and engages with the reserved hole of the upper beam (1).

3. The frame processing device according to claim 1, characterized in that, The lower pressing plate (39) is connected to the second positioning seat (33) by bolts. The lower pressing plate (39) is threaded with a locking bolt, which is used to press against the lower crossbeam (2).

4. A method for machining a frame, using the frame machining apparatus according to any one of claims 1-3, characterized in that... Includes the following steps: S1, install the upper crossbeam (1), lower crossbeam (2), upper crossbeam assembly plate, and lower crossbeam assembly plate onto the welding machining device (3) so that the position of each part reaches the design positioning size; S2, draw a line on the upper crossbeam (1) according to the relative position of the upper crossbeam positioning component and the upper crossbeam (1), and draw a line on the lower crossbeam (2) according to the relative position of the lower crossbeam positioning component and the lower crossbeam (2). S3, remove the upper crossbeam (1), lower crossbeam (2), upper crossbeam assembly plate and lower crossbeam assembly plate from the welding machine (3), and weld the upper crossbeam (1) and lower crossbeam (2) into shape. S4, remove the upper assembly hole positioning assembly and the lower assembly hole positioning assembly from the welding machining device (3), and reinstall the upper crossbeam (1) and the lower crossbeam (2) on the welding machining device (3) according to the marked position; S5, using the welding machining device (3) as tooling, process the assembly holes of the upper crossbeam assembly plate and the lower crossbeam assembly plate on the machine tool.

5. The frame processing method according to claim 4, characterized in that, The following steps are included after step S5: S6, connect the support fixing device (4) to the upper crossbeam (1) and lower crossbeam (2) on the welding machining device (3); S7, remove the welding machining device (3), and weld the upper crossbeam (1) and lower crossbeam (2) fixed under the support fixing device (4) to the frame assembly.

6. The frame processing method according to claim 5, characterized in that, In step S1, before installing the upper crossbeam (1), lower crossbeam (2), upper crossbeam assembly plate, and lower crossbeam assembly plate onto the welding machining device (3), the bottom holes of the assembly holes are pre-machined on the upper crossbeam assembly plate and the lower crossbeam assembly plate.

7. The frame processing method according to claim 4, characterized in that, In step S2, a scribing needle is used to scribble lines on the upper crossbeam (1) and the lower crossbeam (2).

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