Welding device for machining metal structural parts of engineering machinery

Abstract

The invention discloses a welding device for engineering machinery metal structural part machining, which comprises a welding table and a welding device, and further comprises a fitting assembly, a welding frame is fixedly mounted at the top of the welding table, a sliding device is arranged at the top of the welding frame, and a lifting device is fixedly mounted at the bottom of the sliding device; the welding equipment is fixedly installed at the output end of the lifting equipment, the attaching assembly comprises a square plate, a detection rod, a bearing rod, a hollow frame, a solid plate and an attaching groove, and the solid plate is limited by an elastic telescopic block so that the lifting equipment cannot move downwards. In the welding process, the lifting equipment cannot move downwards, so that the welding equipment and the structural part keep a proper welding distance, the welding temperature can be relatively accurately controlled through the proper welding distance, the defects such as burnthrough or undercut of the structural part are avoided, and therefore the welding seam forming quality is improved. The method has the characteristic of ensuring proper welding distance between the welding equipment and the structural part.

Description

Technical Field

[0001] The present invention relates to the technical field of metal welding, in particular to a welding device for processing metal structural parts of engineering machinery. Background Art

[0002] The welding equipment used for processing metal structural parts of engineering machinery usually consists of a welding table, a welding frame, welding equipment and lifting equipment.

[0003] The patent with patent announcement number CN219633017U relates to a metal welding device, including a workbench, a two-way reciprocating component is fixedly installed on the front side of the bottom of the workbench, and a through groove corresponding to the two-way reciprocating component is opened on the upper surface of the workbench. Two connecting rods are symmetrically fixedly installed at the front and rear ends in opposite directions of the two-way reciprocating component, and two clamping and fixing components are symmetrically fixed on the top of the two connecting rods extending to the top above the workbench. The patent structure is reasonable and practical, and the operation is convenient. It is convenient to automatically clamp and dock two circular metal tubes that need to be interfaced for welding. When welding the interface of the two circular metal tubes, there is no need to manually flip and fix them, and the automatic rotation welding of the interface of the two circular metal tubes can be completed, which reduces the work intensity of the staff, improves work efficiency, saves time and effort, and brings convenience to the welding of circular metal tubes.

[0004] In the above patent, when welding the interface of two circular metal tubes, there is no need to manually flip and fix them, and automatic rotation welding of the interface of the two circular metal tubes can be completed, which reduces the workload of the staff, improves work efficiency, saves time and effort, and brings convenience to the welding of circular metal tubes. However, it is difficult to ensure that the welding equipment and the structural parts maintain a suitable welding distance. If the welding distance is too close, the temperature will be too high, causing the structural parts to burn through, thereby affecting the quality of the weld formation. When the welding distance is too far, the structural parts cannot get enough heat, and welding defects such as incomplete welding and undercutting are prone to occur. Therefore, it is very necessary to have a welding device for processing metal structural parts of engineering machinery that has a strong design practicality and can ensure that the welding equipment and the structural parts maintain a suitable welding distance. Summary of the Invention

[0005] The object of the present invention is to provide a welding device for processing metal structural parts of engineering machinery to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A welding device for processing metal structural parts of engineering machinery, comprising a welding table and a welding device, and also comprising a bonding component, wherein a welding frame is fixedly installed on the top of the welding table, a sliding device is provided on the top of the welding frame, a lifting device is fixedly installed on the bottom of the sliding device, the welding device is fixedly installed at the output end of the lifting device, and a structural part is provided on the top of the welding table; the bonding component comprises a square plate, a detection rod, a load-bearing rod, a hollow frame, a solid plate, a hollow groove, an elastic telescopic block and a bonding groove, the square plate is fixedly installed at the output end of the lifting device, the detection rod slides through the top of the square plate, the load-bearing rod is fixedly installed at the fixed end of the lifting device, the A spring is provided between the detection rod and the square plate. The detection rod moves upward to squeeze the spring. The spring is deformed by the squeezing of the detection rod and stores force. After the detection rod is out of contact with the structural member, the detection rod can be driven to reset by the spring. The hollow frame is slidably installed on the circumferential surface of the load-bearing rod, and the solid plate is slidably installed on the inner wall of the hollow frame. The bottom of the solid plate is slidably connected to the square plate. The hollow groove is provided on the front side of the hollow frame, and the elastic telescopic block is fixedly installed on the front side of the solid plate. The fitting groove is provided on the circumferential surface of the fixed end of the lifting device. The solid plate is limited by the elastic telescopic block, so that the lifting device cannot move downward. The lifting device cannot move downward, so that the welding equipment and the structural member maintain a suitable welding distance.

[0007] According to the above technical solution, the rear bottom of the solid plate is set as an inclined surface, and a bonding plate is fixedly installed at the output end of the lifting equipment. The operation of the sliding equipment drives the lifting equipment and the welding equipment to move back and forth.

[0008] According to the above technical solution, a second spring is provided between the hollow frame and the lifting device. The hollow frame moves forward to squeeze the second spring. The second spring is squeezed by the hollow frame to produce deformation and store force. After the solid plate is out of contact with the detection rod, the second spring can drive the hollow frame to reset. The top of the detection rod is set to an arc surface, and the top of the front side of the elastic telescopic block is set to an inclined surface. By setting the top of the front side of the elastic telescopic block to an inclined surface, the elastic telescopic block will not be stuck in the fitting groove when it moves upward to reset.

[0009] According to the above technical solution, it also includes a friction component and a detection component. The friction component is used to treat the rust at the welding point of the structural parts, and the detection component is used to detect the placement position of the structural parts. The friction component includes a placement hole, an elastic telescopic rod, a T-shaped plate, a storage groove, a grinding frame and a grinding plate. The grinding frame moves downward to disengage from the contact with the structural parts to prevent the grinding frame from colliding with the welding equipment. The placement hole is opened on the front side of the welding frame, the elastic telescopic rod is fixedly installed on the bottom of the inner wall of the placement hole, the T-shaped plate is fixedly installed on the free end of the elastic telescopic rod, the storage groove is opened on the top of the welding table, the grinding frame is slidably installed on the inner wall of the storage groove, and the grinding plate is slidably installed on the inner wall of the grinding frame.

[0010] According to the above technical solution, the friction assembly also includes a stabilizing plate and a fastening plate. The stabilizing plate is fixedly installed on the top of the welding table, and the fastening plate is slidably installed on the top of the welding table. The fastening plate is in contact with the structural member, and the polishing plate cooperates with the elastic force of spring four to polish the welding part of the structural member.

[0011] According to the above technical solution, a spring three is provided between the grinding frame and the storage slot. The grinding frame moves downward to squeeze the spring three. The spring three is squeezed by the grinding frame to produce deformation and store force. After the grinding frame is out of contact with the T-shaped plate, the grinding frame can be driven to reset by the spring three. A spring four is provided between the grinding frame and the grinding plate. The grinding plate is squeezed upward by the structural part and squeezes the spring four. The spring four is squeezed by the grinding plate to produce deformation and store force. After the grinding plate is out of contact with the structural part, the grinding plate can be driven to reset by the spring four. A spring five is provided between the fastening plate and the stabilizing plate. The fastening plate can be supported by the spring five. The fastening plate moves to the left and resets to squeeze the structural part, thereby ensuring that the welding of the two structural parts is tight.

[0012] According to the above technical solution, the detection component includes a hollow tube, a detection rod, a lifting rod, a rubber block, a kneading frame and a positioning plate. The structural part is squeezed upward by the lifting rod, thereby indicating that the position of the structural part is offset. The hollow tube is fixedly installed on the inner wall of the installation hole, the detection rod is slidably installed on the inner wall of the hollow tube, the lifting rod is slidably installed on the inner wall of the hollow tube, the rubber block is fixedly installed on the front side of the lifting rod, the kneading frame is fixedly installed on the front side of the hollow tube, the positioning plate is fixedly installed on the top of the welding table, and liquid is arranged inside the hollow tube.

[0013] According to the above technical solution, a spring six is ​​provided between the hollow tube and the detection rod, and the detection rod can be supported by the spring six. A rubber ring is provided between the hollow tube and the detection rod, and the rubber ring can increase the sealing between the hollow tube and the detection rod. A rubber ring is provided between the hollow tube and the lifting rod, and the rubber ring can increase the sealing between the hollow tube and the lifting rod.

[0014] According to the above technical solution, the left side of the detection rod is set as an inclined surface, the kneading frame is in contact with the rubber block, and the positioning plate is in contact with the structural member. The rubber block is slowly deformed by the reaction force of the squeeze kneading frame, and the slow deformation of the rubber block causes the lifting rod to slowly lift upward.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are: (1) In this invention, the solid plate is limited by the elastic expansion block, so that the lifting device cannot move downward. The lifting device cannot move downward, so that the welding device and the structural member maintain a suitable welding distance. The suitable welding distance can relatively accurately control the welding temperature, thereby avoiding defects such as burn-through or undercutting of the structural member, thereby improving the quality of the weld formation. The sliding device drives the lifting device and the welding device to move back and forth. The back and forth movement of the welding device can cover different welding areas of large structural members, ensuring that the welding distance of each part of the structural member is consistent, thereby effectively avoiding differences in welding quality caused by position differences.

[0016] (2) This invention prevents the grinding frame from colliding with the welding equipment by moving the grinding frame downward to break away from the contact with the structural part, avoids hard collision between the grinding frame and the welding equipment due to position interference, prevents deformation of the welding equipment nozzle, and thus reduces abnormal wear of the equipment. The welding part of the structural part is polished by the grinding plate in conjunction with the elastic force of the spring four. The spring four enables the grinding plate to self-adjust and fit closely to the surface of the structural part. For structural parts of different thicknesses, the grinding pressure can be evenly distributed, thereby removing the rust on the welding part and exposing the fresh base of the metal surface.

[0017] (3) This invention ensures that the welds between the two structural parts are tightly fitted by moving the fastening plate to the left to reposition it. The tight fit between the two structural parts can eliminate the welding gap, thereby avoiding defects such as loss of molten pool metal and lack of fusion caused by the gap.

[0018] (4) In this invention, if the position of the structural part is deviated, it will come into contact with the lifting rod. At this time, the lifting rod will move upward to squeeze the structural part. The structural part will be squeezed upward by the lifting rod, which will indicate that the position of the structural part is offset. Through the mechanical lifting of the lifting rod, the operator can quickly locate the offset position and adjust it, thereby effectively avoiding welding defects caused by position deviation.

[0019] (5) This invention uses the slow deformation of the rubber block to slowly lift the lifting rod upward, thereby preventing the two structural parts from overlapping due to excessive lifting. The elastic buffering characteristics of the rubber block make the lifting process uniform and smooth, thereby avoiding the misalignment or excessive overlap of the two structural parts due to excessive instantaneous impact force, thereby ensuring the long-term stable operation of the welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the position structure of the sliding device and the lifting device of the present invention; Figure 3 This invention Figure 2 A schematic diagram of the structure of part A in the middle; Figure 4 This is a schematic diagram of the position structure of the solid plate and the elastic expansion block of the present invention; Figure 5 This is a schematic diagram of the position structure of the elastic telescopic rod and the T-shaped plate of the present invention; Figure 6 This invention Figure 5 A magnified schematic diagram of the structure of part B; Figure 7 It is a schematic diagram of the position structure of the grinding frame and the grinding plate of the present invention.

[0021] In the figure: 1. Welding table; 2. Welding frame; 3. Sliding device; 4. Lifting device; 5. Square plate; 6. Detection rod; 7. Load-bearing rod; 8. Hollow frame; 9. Solid plate; 10. Hollow groove; 11. Elastic telescopic block; 12. Fitting groove; 13. Fitting plate; 141. Placement hole; 142. Elastic telescopic rod; 143. T-shaped plate; 144. Storage groove; 145. Grinding frame; 146. Grinding plate; 147. Stabilizing plate; 148. Fastening plate; 151. Hollow tube; 152. Detection rod; 153. Lifting rod; 154. Rubber block; 155. Kneading frame; 156. Positioning plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0023] See also Figure 1-7The present invention provides a technical solution: a welding device for processing metal structural parts of engineering machinery, including a welding platform 1 and a welding device, and also including a bonding component. A welding frame 2 is fixedly installed on the top of the welding platform 1, a sliding device 3 is provided on the top of the welding frame 2, a lifting device 4 is fixedly installed on the bottom of the sliding device 3, the welding device is fixedly installed at the output end of the lifting device 4, and a structural member is provided on the top of the welding platform 1; the bonding component includes a square plate 5, a detection rod 6, a load-bearing rod 7, a hollow frame 8, a solid plate 9, a hollow groove 10, an elastic telescopic block 11 and a bonding groove 12, the square plate 5 is fixedly installed at the output end of the lifting device 4, the detection rod 6 slides through the top of the square plate 5, the load-bearing rod 7 is fixedly installed at the fixed end of the lifting device 4, the detection rod 6 is provided with a spring 1 between the square plate 5, and the detection rod 6 moves upward to squeeze the spring 1. The spring 1 is squeezed by the detection rod 6 to produce deformation and store force. After the detection rod 6 is out of contact with the structural member, the detection rod 6 can be driven to reset by the spring 1. The hollow frame 8 is slidably installed on the circumferential surface of the load-bearing rod 7, and the solid plate 9 is slidably installed on the inner wall of the hollow frame 8. The bottom of the solid plate 9 is slidably connected to the square plate 5. The hollow groove 10 is opened on the front side of the hollow frame 8, and the elastic telescopic block 11 is fixedly installed on the front side of the solid plate 9. The fitting groove 12 is opened on the circumferential surface of the fixed end of the lifting device 4. The appropriate welding distance can relatively accurately control the welding temperature, thereby avoiding defects such as burn-through or biting of the structural members, thereby improving the quality of the weld formation.

[0024] The bottom of the rear side of the solid plate 9 is set as an inclined surface, and a bonding plate 13 is fixedly installed at the output end of the lifting device 4. The sliding device 3 drives the lifting device 4 and the welding equipment to move back and forth. The back and forth movement of the welding equipment can cover different welding areas of large structural parts, ensuring that the welding distances of various parts of the structural parts are consistent, thereby effectively avoiding differences in welding quality caused by position differences.

[0025] A second spring is provided between the hollow frame 8 and the lifting device 4. The hollow frame 8 moves forward to squeeze the second spring. The second spring is squeezed by the hollow frame 8 to produce deformation and store force. After the solid plate 9 is out of contact with the detection rod 6, the second spring can drive the hollow frame 8 to reset. The top of the detection rod 6 is set to an arc surface, and the top of the front side of the elastic telescopic block 11 is set to an inclined surface. By setting the top of the front side of the elastic telescopic block 11 to an inclined surface, the elastic telescopic block 11 will not be stuck in the fitting groove 12 when it moves upward to reset.

[0026] When this embodiment is working, the structural part to be welded is placed on the top of the welding table 1. After the structural part is placed on the top of the welding table 1, the lifting device 4 is operated so that the output end of the lifting device 4 moves downward, driving the welding device to move downward. The output end of the lifting device 4 moves downward, driving the detection rod 6 to move downward. The detection rod 6 moves downward and contacts the structural part and squeezes the structural part. The detection rod 6 moves upward under the reaction force of the squeezed structural part. The detection rod 6 moves upward and contacts the inclined surface of the solid plate 9 and squeezes the solid plate 9. The solid plate 9 is squeezed by the detection rod 6 and moves forward. The hollow frame 8 is driven to move forward, and the solid plate 9 moves forward, driving the elastic telescopic block 11 to move forward. The elastic telescopic block 11 moves forward and contacts the fitting groove 12 to limit the solid plate 9. The solid plate 9 is limited by the elastic telescopic block 11, which makes the lifting device 4 unable to move downward. The lifting device 4 cannot move downward, so that the welding device and the structural member maintain a suitable welding distance. After the welding device and the structural member maintain a suitable welding distance, the welding device starts to weld the two structural members. At the same time, the sliding device 3 drives the lifting device 4 and the welding device to move back and forth. Example 2

[0027] See also Figure 1-7 On the basis of embodiment 1, this embodiment further includes a friction component and a detection component. The friction component is used to treat the rust at the welding position of the structural parts, and the detection component is used to detect the placement position of the structural parts. The friction component includes a placement hole 141, an elastic telescopic rod 142, a T-shaped plate 143, a storage groove 144, a grinding frame 145 and a grinding plate 146. The placement hole 141 is opened on the front side of the welding frame 2, the elastic telescopic rod 142 is fixedly installed on the bottom of the inner wall of the placement hole 141, the T-shaped plate 143 is fixedly installed on the free end of the elastic telescopic rod 142, the storage groove 144 is opened on the top of the welding table 1, the grinding frame 145 is slidably installed on the inner wall of the storage groove 144, and the grinding plate 146 is slidably installed on the inner wall of the grinding frame 145, so as to avoid hard collision between the grinding frame 145 and the welding equipment due to position interference, thereby preventing deformation of the welding equipment nozzle and reducing abnormal wear of the equipment.

[0028] The friction assembly also includes a stabilizing plate 147 and a fastening plate 148. The stabilizing plate 147 is fixedly installed on the top of the welding table 1, and the fastening plate 148 is slidably installed on the top of the welding table 1. The fastening plate 148 is in contact with the structural parts. The grinding plate 146 cooperates with the elastic force of the spring four to grind the welding parts of the structural parts. For structural parts of different thicknesses, the grinding pressure can be evenly distributed, thereby removing the rust on the welding parts and exposing the fresh base on the metal surface.

[0029] A spring three is provided between the grinding frame 145 and the receiving groove 144. The grinding frame 145 moves downward to squeeze the spring three. The spring three is squeezed by the grinding frame 145 to produce deformation and store force. After the grinding frame 145 is out of contact with the T-shaped plate 143, the spring three can drive the grinding frame 145 to reset. A spring four is provided between the grinding frame 145 and the grinding plate 146. The grinding plate 146 is squeezed upward by the structural member and squeezes the spring four. The spring four is squeezed by the grinding plate 146 Deformation is generated and force is accumulated. After the grinding plate 146 is out of contact with the structural part, the grinding plate 146 can be driven to reset by spring four. A spring five is provided between the fastening plate 148 and the stabilizing plate 147. The fastening plate 148 can be supported by the spring five. The fastening plate 148 moves to the left and resets to squeeze the structural part to ensure that the welding of the two structural parts is tightly fitted. The close fit of the two structural parts can eliminate the welding gap, thereby avoiding defects such as loss of molten pool metal and unfusion caused by the gap.

[0030] The detection component includes a hollow tube 151, a detection rod 152, a lifting rod 153, a rubber block 154, a kneading frame 155 and a positioning plate 156. The hollow tube 151 is fixedly installed on the inner wall of the placement hole 141, the detection rod 152 is slidably installed on the inner wall of the hollow tube 151, the lifting rod 153 is slidably installed on the inner wall of the hollow tube 151, the rubber block 154 is fixedly installed on the front side of the lifting rod 153, the kneading frame 155 is fixedly installed on the front side of the hollow tube 151, and the positioning plate 156 is fixedly installed on the top of the welding table 1. Liquid is provided inside the hollow tube 151. Through the mechanical lifting of the lifting rod 153, the operator can quickly locate the offset position and adjust it, thereby effectively avoiding welding defects caused by position deviation.

[0031] A spring six is ​​provided between the hollow tube 151 and the detection rod 152, and the detection rod 152 can be supported by the spring six. A rubber ring is provided between the hollow tube 151 and the detection rod 152, and the rubber ring can increase the sealing between the hollow tube 151 and the detection rod 152. A rubber ring is provided between the hollow tube 151 and the lifting rod 153, and the rubber ring can increase the sealing between the hollow tube 151 and the lifting rod 153.

[0032] The left side of the detection rod 152 is set as an inclined surface, the kneading frame 155 is in contact with the rubber block 154, and the positioning plate 156 is in contact with the structural part. The rubber block 154 is squeezed by the reaction force of the kneading frame 155 and slowly deforms. The slow deformation of the rubber block 154 causes the lifting rod 153 to slowly lift upward. The elastic buffering characteristics of the rubber block 154 make the lifting process uniform and smooth, thereby avoiding the dislocation or excessive overlap of the two structural parts due to excessive instantaneous impact force, thereby ensuring the long-term stable operation of the welding equipment.

[0033] When this embodiment is working, the output end of the lifting device 4 moves downward, driving the bonding plate 13 to move downward, and the bonding plate 13 moves downward to contact the T-shaped plate 143 and squeeze the T-shaped plate 143. The T-shaped plate 143 is squeezed and moved downward by the bonding plate 13. The T-shaped plate 143 moves downward to squeeze the free end of the elastic telescopic rod 142. The free end of the elastic telescopic rod 142 is squeezed and retracted by the T-shaped plate 143 and stores force. At the same time, the T-shaped plate 143 moves downward to contact the grinding frame 145 and squeeze the grinding frame 145. The grinding frame 145 is squeezed and moved downward by the T-shaped plate 143. The grinding frame 145 moves downward to break away from the contact with the structural member, thereby preventing the grinding frame 145 from colliding with the welding equipment. In the process of placing the two structural parts on the top of the welding table 1, the structural parts will contact the grinding plate 146 and squeeze the grinding plate 146. The grinding plate 146 cooperates with the elastic force of the spring four to grind the welding part of the structural part. After the welding part of the structural part is polished, the fastening plate 148 is manually pulled to the right. The fastening plate 148 moves to the right to squeeze the spring five. The spring five is squeezed by the fastening plate 148 to produce deformation and accumulate force. After the structural part is placed on the top of the welding table 1, the fastening plate 148 is loosened so that the fastening plate 148 moves to the left and resets under the action of the elastic force of the spring five. The fastening plate 148 moves to the left and resets to squeeze the structural part, thereby ensuring that the welding part of the two structural parts is tightly fitted.

[0034] The grinding frame 145 moves downward and contacts the inclined surface of the detection rod 152 and squeezes the detection rod 152. The detection rod 152 is squeezed to the right by the grinding frame 145. The detection rod 152 moves to the right to squeeze the spring six. The spring six is ​​squeezed by the detection rod 152 to produce deformation and store force. At the same time, the detection rod 152 moves to the right to squeeze the liquid inside the hollow tube 151. The liquid inside the hollow tube 151 is squeezed to the right by the detection rod 152. The liquid inside the hollow tube 151 moves to the right to squeeze the lifting rod 153. The lifting rod 153 is squeezed by the hollow tube 151 and moves upward. The lifting rod 153 moves upward The position of the structural part is detected. If the position of the structural part is deviated, it will contact the lifting rod 153. At this time, the lifting rod 153 moves upward to squeeze the structural part. The structural part is squeezed and tilted upward by the lifting rod 153, which indicates that the position of the structural part is offset. At the same time, the lifting rod 153 moves upward to drive the rubber block 154 to move upward. The rubber block 154 moves upward and contacts the kneading frame 155 and squeezes the kneading frame 155. The rubber block 154 is slowly deformed by the reaction force of the kneading frame 155. The slow deformation of the rubber block 154 causes the lifting rod 153 to slowly lift upward, thereby preventing the two structural parts from overlapping due to excessive lifting.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A welding device for processing metal structural parts of engineering machinery, comprising a welding table and welding equipment, characterized in that: It also includes a fitting component, a friction component and a detection component. A welding frame is fixedly installed on the top of the welding table, a sliding device is provided on the top of the welding frame, a lifting device is fixedly installed on the bottom of the sliding device, the welding device is fixedly installed at the output end of the lifting device, and a structural part is provided on the top of the welding table; The fitting component includes a square plate, a detection rod, a load-bearing rod, a hollow frame, a solid plate, a hollow groove, an elastic telescopic block and a fitting groove. The square plate is fixedly installed at the output end of the lifting device, the detection rod slides through the top of the square plate, the load-bearing rod is fixedly installed at the fixed end of the lifting device, a spring is provided between the detection rod and the square plate, the hollow frame is slidably installed on the circumferential surface of the load-bearing rod, the solid plate is slidably installed on the inner wall of the hollow frame, the bottom of the solid plate is slidably connected to the square plate, the hollow groove is opened on the front side of the hollow frame, the elastic telescopic block is fixedly installed on the front side of the solid plate, and the fitting groove is opened on the circumferential surface of the fixed end of the lifting device.

2. A welding device for processing metal structural parts of engineering machinery according to claim 1, characterized in that: The friction component is used to treat the rust at the welding points of the structural parts, the detection component is used to detect the placement of the structural parts, the rear bottom of the solid plate is set as an inclined surface, and the output end of the lifting equipment is fixedly installed with a bonding plate.

3. The welding device for processing metal structural parts of engineering machinery according to claim 2, characterized in that: A second spring is provided between the hollow frame and the lifting device. The top of the detection rod is provided as an arc surface, and the top of the front side of the elastic telescopic block is provided as an inclined surface.

4. The welding device for processing metal structural parts of engineering machinery according to claim 3, characterized in that: The friction assembly includes a placement hole, an elastic telescopic rod, a T-shaped plate, a receiving groove, a grinding frame and a grinding plate. The placement hole is opened on the front side of the welding frame, the elastic telescopic rod is fixedly installed on the bottom of the inner wall of the placement hole, the T-shaped plate is fixedly installed on the free end of the elastic telescopic rod, the receiving groove is opened on the top of the welding table, the grinding frame is slidably installed on the inner wall of the receiving groove, and the grinding plate is slidably installed on the inner wall of the grinding frame.

5. The welding device for processing metal structural parts of engineering machinery according to claim 4, characterized in that: The friction assembly further comprises a stabilizing plate and a fastening plate, wherein the stabilizing plate is fixedly mounted on the top of the welding platform, and the fastening plate is slidably mounted on the top of the welding platform, and the fastening plate contacts the structural member.

6. The welding device for processing metal structural parts of engineering machinery according to claim 5, characterized in that: A spring three is provided between the polishing frame and the receiving slot, a spring four is provided between the polishing frame and the polishing plate, and a spring five is provided between the fastening plate and the stabilizing plate.

7. The welding device for processing metal structural parts of engineering machinery according to claim 6, characterized in that: The detection assembly includes a hollow tube, a detection rod, a lifting rod, a rubber block, a kneading frame and a positioning plate. The hollow tube is fixedly installed on the inner wall of the placement hole, the detection rod is slidably installed on the inner wall of the hollow tube, the lifting rod is slidably installed on the inner wall of the hollow tube, the rubber block is fixedly installed on the front side of the lifting rod, the kneading frame is fixedly installed on the front side of the hollow tube, the positioning plate is fixedly installed on the top of the welding table, and liquid is provided inside the hollow tube.

8. The welding device for processing metal structural parts of engineering machinery according to claim 7, characterized in that: A spring six is ​​provided between the hollow tube and the detection rod, a rubber ring is provided between the hollow tube and the detection rod, and a rubber ring is provided between the hollow tube and the lifting rod.

9. The welding device for processing metal structural parts of engineering machinery according to claim 8, characterized in that: The left side of the detection rod is set as an inclined surface, the kneading frame is in contact with the rubber block, and the positioning plate is in contact with the structural member.

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