Commercial vehicle fender base structure adapted for friction welding and process thereof

Abstract

This invention relates to the field of commercial vehicle component technology, and discloses a commercial vehicle mudguard base structure and its process adapted for friction welding. The structure includes a support tube, with a connecting sheet metal fixedly connected to one end face. A support plate is fixedly connected to the surface of the support tube. A friction welding ring is fixedly connected to the end face of the support tube away from the connecting sheet metal, and a connecting steel pipe is fixedly connected to the end face of the friction welding ring away from the support tube. In use, within the welded component, during installation, a socket block and a rod block are placed along the surface of the friction welding ring. Simultaneously, the rod slides along the inner wall of the socket block, stabilizing the surface of the friction welding ring and enhancing the stress at the weld, thus increasing service life. Then, a connecting socket is inserted into the inner wall of the rod block. The telescopic rod is then pulled to extend and retract, causing the sliding tube to adjust its position, ultimately aligning the expansion rod with the horizontal position of the rod's inner hole.

Description

Technical Field

[0001] This invention relates to the field of commercial vehicle parts and equipment technology, specifically to a commercial vehicle mudguard base structure and its process adapted for friction welding. Background Technology

[0002] The mudguard base of a commercial vehicle is a key load-bearing component connecting the vehicle frame and the mudguard. Its design directly affects the stability of the mudguard, the level of vehicle lightweighting, and production costs. Current technological developments mainly focus on structural optimization, material innovation, and process improvement to enhance strength, reduce weight, and increase versatility.

[0003] Currently, mudguard brackets mainly adopt a split structure, consisting of a cast iron or cast steel base and steel pipes. However, the connecting plate has a complex structure and assembly process, resulting in high costs. More importantly, the connection often becomes loose or cracked during operation, which can easily cause the mudguard bracket to break, seriously affecting the normal use of the mudguard. Summary of the Invention

[0004] The purpose of this invention is to provide a commercial vehicle mudguard base structure and its process adapted for friction welding, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a commercial vehicle mudguard base structure and its process adapted for friction welding, comprising a support tube, a connecting sheet metal fixedly connected to one end face of the support tube, a support plate fixedly connected to the surface of the support tube, and a friction welding ring fixedly connected to the end face of the support tube away from the connecting sheet metal, and further comprising: A welding component, the welding component including a socket block, a plug block being provided on the surface of the socket block, and a plug block being fixedly connected to the surface of the plug block near the socket block; A heat-fitting stabilizing component, comprising a sleeve, a support plate fixedly connected to the surface of the sleeve, and a fixing block fixedly connected to the end face of the sleeve near the support plate. An anti-drop component, comprising a positioning plate, a positioning rod fixedly connected to the surface of the positioning plate, and an outer fixing plate fixedly connected to the surface of the positioning plate near the positioning rod.

[0006] Furthermore, a connecting steel pipe is fixedly connected to the end face of the friction welding ring away from the support tube, and a base is fixedly connected to the surface of the connecting steel pipe away from the friction welding ring. There are two support plates, which are symmetrically distributed on the surface of the support tube.

[0007] Furthermore, the welding component includes an inner hole for the insertion rod, the surface of the insertion hole block near the insertion rod block is in contact with the surface of the insertion rod block near the insertion rod, the surface of the insertion rod is slidably connected to the inner wall of the insertion hole block, and the number of insertion rods is set to four, the four insertion rods are divided into two groups, and each group has two insertion rods, the two groups of insertion rods are symmetrically distributed on the surface of the insertion rod block, and the insertion rods in each group are symmetrically distributed on the surface of the insertion rod block.

[0008] Furthermore, a connecting socket is inserted into the surface of the plug block near the inner hole of the plug, a connecting rod is fixedly connected to the surface of the connecting socket, a telescopic rod is fixedly connected to the surface of the connecting rod away from the connecting socket, a sliding tube is fixedly connected to the inner wall of the telescopic rod away from the connecting rod, an expansion plug is slidably connected to the inner wall of the sliding tube, two connecting rods are provided, the two connecting rods are symmetrically distributed with respect to the surface of the connecting socket, two sliding tubes are provided, the two sliding tubes are symmetrically distributed with respect to the surface of the telescopic rod, and the surface of the expansion plug is slidably connected to the inner wall of the inner hole of the plug.

[0009] Furthermore, the heat-fixing stabilizing component includes upright plates. The surface of the sleeve contacts the surface of the base near the connecting steel pipe. There are two sleeves. The two sleeves are symmetrically distributed with respect to the surface of the connecting steel pipe. There are also two fixing blocks. Two fixing blocks are symmetrically distributed with respect to the end faces of the sleeves. The surface of the fixing blocks is inserted into the inner wall of the insertion hole block. The surface of the other set of fixing blocks is inserted into the inner wall of the insertion rod block. There are four upright plates. The four upright plates are divided into two groups, and each group has two upright plates. The two groups of upright plates are symmetrically distributed with respect to the surface of the connecting steel pipe, and each group of upright plates is symmetrically distributed with respect to the surface of the sleeve.

[0010] Furthermore, a clamping tube is fixedly connected to the surface of the upright plate near the support plate, and a clamping post is clamped to the inner wall of the clamping tube. A crossbar is fixedly connected to the surface of the upright plate near the clamping tube, and a fixing plate is inserted into the surface of the crossbar near the support plate. The end face of the clamping post away from the clamping tube is fixedly connected to the surface of the insertion block, and the end face of another set of clamping posts away from the clamping tube is fixedly connected to the surface of the insertion block. The surface of the fixing plate penetrates the surfaces of the insertion block and the support plate and is slidably connected to the surfaces of the insertion block and the support plate. There are four crossbars, which are symmetrically distributed around the center of the surface of the upright plate.

[0011] Furthermore, the anti-drop component includes an inner groove, a fixing spring fixedly connected to the surface of the inner groove, a sliding telescopic rod fixedly connected to one end face of the fixing spring inner groove, the end face of the positioning plate away from the positioning rod fixedly connected to the surface of the support plate, two positioning rods symmetrically distributed around the surface of the positioning plate, the surface of the outer fixing plate near the positioning plate in contact with the surface of the support plate, two inner grooves equidistantly distributed along the surface of the outer fixing plate, two fixing springs symmetrically distributed around the surface of the inner groove, and the surface of the sliding telescopic rod near the fixing spring slidingly connected to the inner wall of the inner groove.

[0012] Furthermore, a connecting groove plate is fixedly connected to the end face of the sliding telescopic rod away from the fixed spring. A sliding fixed plate is slidably connected to the inner wall of the connecting groove plate away from the sliding telescopic rod. A rotating rod is fixedly connected to the surface of the connecting groove plate near the sliding telescopic rod. A rotating plate is rotatably connected to the surface of the rotating rod. A locking plate is fixedly connected to the surface of the rotating plate away from the rotating rod. The surface of the connecting groove plate slides along the inner wall of the outer fixed plate. There are two rotating rods, which are symmetrically distributed with respect to the surface of the connecting groove plate.

[0013] Furthermore, the aforementioned commercial vehicle mudguard base structure and process adapted for friction welding includes the following steps: S1: Base structure optimization: The original mudguard base, forged from Q355 material, was replaced with a cast base made of QT800-5 high-grade ductile iron. A high-precision inner hole was machined at the welding connection end of the casting base. The dimensional accuracy and coaxiality of the inner hole are compatible with the transition connection steel pipe for subsequent assembly, ensuring the tightness of the assembly. S2: Design of transitional steel pipe with variable diameter: The transitional steel pipe is made of the same seamless steel pipe as the mudguard bracket support steel pipe. The transitional steel pipe has a variable diameter structure. The hot fitting section is φ58*5. After the diameter is reduced, a friction welding section of φ51*5 is formed. This ensures the assembly and fitting requirements with the inner hole of the casting base, and also matches the welding area when welding with the φ50*4 support steel pipe, avoiding the impact of misalignment on the welding strength. S3: Design of transition steel pipe with variable diameter: The transition steel pipe is made of the same seamless steel pipe as the mudguard bracket support steel pipe. The transition steel pipe has a variable diameter structure. The hot fitting section is φ58*5. After the diameter is reduced, a friction welding section of φ51*5 is formed. This ensures the assembly and fitting requirements with the inner hole of the casting base, and also matches the welding area when welding with the φ50*4 support steel pipe, avoiding the impact of misalignment on the welding strength. S4: Friction welding connection process: After the transition connecting steel pipe and the casting base are thermally fixed, the φ50*4 support steel pipe of the mudguard bracket and the φ51*5 friction welding section of the transition connecting steel pipe on the base are coaxially connected. The two steel pipes of the same material are friction welded using the existing friction welding process to form an integral mudguard bracket. S5: Process Adaptation Requirements: The inner hole of the welding end of the casting base is machined to a high-precision dimension to match the φ58*5 hot fitting section. The φ515 friction welding section of the transition connecting steel pipe and the inner hole of the casting base adopt a heavy-duty interference fit of 0.071~0.097mm. The length of the transition connecting steel pipe is based on meeting the friction welding operation space and covering the welding stress area of ​​the base. The transition connecting steel pipe and the inner hole of the casting base adopt local induction heating for hot fitting. The heating temperature is controlled at 350~400℃. After local heating, the transition connecting steel pipe is coaxially pressed in and naturally cooled to room temperature to achieve mechanical fastening.

[0014] The present invention has the following beneficial effects: In use of this invention, during device installation, the insertion block and the insertion rod block are placed along the surface of the friction welding ring within the welded component. Simultaneously, the insertion rod slides along the inner wall of the insertion block, stabilizing the surface of the friction welding ring and enhancing the stress at the weld joint, thus increasing service life. Then, the connecting socket is inserted into the inner wall of the insertion rod block. The telescopic rod is then pulled to extend and retract, adjusting the position of the sliding tube until the expansion rod is aligned horizontally with the inner hole of the insertion rod. The expansion rod is then pushed along the inner wall of the insertion rod's inner hole. Once fully inserted, the expansion rod undergoes thermal expansion. The tensile force generated by the telescopic rod provides external stability to the device. The thermal expansion of the expansion rod also increases the internal stress on the inner wall of the insertion rod's inner hole, thereby increasing the internal stress of the insertion rod inserted into the insertion block and enhancing the stability of the device's inner wall.

[0015] When using this invention, during the installation of the welding component within the heat-fixed stabilizing component, the two sleeves are inserted into the corresponding insertion block and rod block via the fixing block. Alternatively, the two sleeves can be rotated 90 degrees to allow the fixing block to be inserted crosswise with the insertion block and support plate, thus stabilizing the sleeves. The sleeves then provide external stabilization to the contact area between the connecting steel pipe and the base, enhancing the thermal expansion stability of the device at this point and increasing its service life. Once the sleeves are stabilized, the upright plate is used to push the crossbar, allowing it to completely penetrate the surface of the insertion block and support plate. Finally, when the upright plate drives the clamping tube and clamping post to engage, the position of the upright plate is fixed. Then, a fixing plate is inserted along the surface of the penetrating crossbar, fixing the crossbar together with the upright plate. The connection between the insertion block and rod block and the two sleeves enhances the overall stability between the welding component and the heat-fixed stabilizing component of the device.

[0016] When using this invention, the anti-fall component is located inside the device. During installation, the device can be quickly positioned using the positioning plate and positioning rod, making installation more convenient. After the mudguard is installed, the connecting groove plate is pulled along the inner wall of the outer fixed plate to the surface of the mudguard. Then, the sliding fixed plate is slid to push the sliding fixed plate onto the surface of the mudguard. Then, the connecting groove plate is released. At this time, pulling the connecting groove plate will cause the sliding telescopic rod to slide along the surface of the inner groove. The sliding telescopic rod will compress the fixed spring, and the fixed spring will generate a reverse elastic force, which will ultimately act on the sliding fixed plate, causing the sliding fixed plate to generate an elastic thrust on the surface of the mudguard, enhancing the external fixing force of the mudguard surface and preventing the mudguard from falling off. Then, the rotating plate is rotated along the surface of the rotating rod, and then the clamping plate is stretched to pull the clamping plate to the end face of the sliding fixed plate, fixing the end face of the sliding fixed plate and preventing the mudguard from falling off due to the sliding fixed plate, which would affect the use of the device.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the welded component structure of the present invention; Figure 4 This is a schematic diagram of the connection socket structure of the present invention; Figure 5 This is a cross-sectional view of the structure of the heat-fitted stabilizing component of the present invention; Figure 6 This is a schematic diagram of the vertical plate structure of the present invention; Figure 7 This is a schematic diagram of the anti-drop component structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of part A in the image; Figure 9 This invention relates to a commercial vehicle mudguard base structure adapted for friction welding and its process flow diagram.

[0020] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Welded component; 2. Heat-fitted stabilizing component; 3. Anti-fall component; 4. Support tube; 5. Connecting sheet metal; 6. Support plate; 7. Friction welding ring; 8. Connecting steel pipe; 9. Base; 11. Insertion block; 12. Insertion rod block; 13. Insertion rod; 14. Insertion rod inner hole; 15. Connecting socket; 16. Connecting rod; 17. Telescopic rod; 18. Sliding tube; 19. Expansion inserting rod; 21. Sleeve; 22. Support plate; 23. Fixing block; 24. Vertical plate; 25. Pipe clamp; 26. Column clamp; 27. Crossbar; 28. Fixing plate; 31. Positioning plate; 32. Positioning rod; 33. Outer fixing plate; 34. Inner groove; 35. Fixing spring; 36. Sliding telescopic rod; 37. Connecting groove plate; 38. Sliding fixing plate; 39. Rotating rod; 40. Rotating plate; 41. Clamping plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-9 As shown, the present invention relates to a commercial vehicle mudguard base structure and its process adapted for friction welding, comprising a support tube 4, a connecting sheet metal 5 fixedly connected to the end face of the support tube 4, a support plate 6 fixedly connected to the surface of the support tube 4, and a friction welding ring 7 fixedly connected to the end face of the support tube 4 away from the connecting sheet metal 5, and further comprising: The welding component 1 includes a socket block 11, a rod block 12 is provided on the surface of the socket block 11, and a rod 13 is fixedly connected to the surface of the rod block 12 near the socket block 11. When the device is installed, the socket block 11 and the rod block 12 are placed along the surface of the friction welding ring 7, and the rod 13 is slidably inserted along the inner wall of the socket block 11 to complete the stabilization of the surface of the friction welding ring 7 by the socket block 11 and the rod block 12, enhance the stress at the weld, and increase the service life. The heat-fitting stabilizing component 2 includes a sleeve 21. A support plate 22 is fixedly connected to the surface of the sleeve 21. A fixing block 23 is fixedly connected to the end face of the sleeve 21 near the support plate 22. When installing the welding component 1, the two sleeves 21 are inserted into the corresponding insertion hole block 11 and insertion rod block 12 through the fixing block 23. Alternatively, the two sleeves 21 can be rotated 90 degrees so that the fixing block 23 is cross-inserted with the insertion hole block 11 and the support plate 22 to stabilize the sleeve 21. The sleeve 21 will then provide external stabilization for the contact part between the connecting steel pipe 8 and the base 9, enhancing the thermal expansion stability of the device at this point and increasing the service life of the device. The anti-drop component 3 includes a positioning plate 31, a positioning rod 32 fixedly connected to the surface of the positioning plate 31, and an outer fixing plate 33 fixedly connected to the surface of the positioning plate 31 near the positioning rod 32. When the device is installed, the device can be quickly positioned through the positioning plate 31 and the positioning rod 32, thereby making the installation of the device more convenient.

[0023] A connecting steel pipe 8 is fixedly connected to the end face of the friction welding ring 7 away from the support tube 4. A base 9 is fixedly connected to the surface of the connecting steel pipe 8 away from the friction welding ring 7. There are two support plates 6, which are symmetrically distributed on the surface of the support tube 4.

[0024] The welding component 1 includes an inner hole 14 for the insertion rod. The surface of the insertion hole block 11 near the insertion rod block 12 is in contact with the surface of the insertion rod block 12 near the insertion rod 13. The surface of the insertion rod 13 is slidably connected to the inner wall of the insertion hole block 11. There are four insertion rods 13. The four insertion rods 13 are divided into two groups, and each group has two insertion rods. The two groups of insertion rods 13 are symmetrically distributed on the surface of the insertion rod block 12.

[0025] A connecting socket 15 is inserted into the surface of the insert block 12 near the inner hole 14 of the insert rod. A connecting rod 16 is fixedly connected to the surface of the connecting socket 15. A telescopic rod 17 is fixedly connected to the surface of the connecting rod 16 away from the connecting socket 15. A slide tube 18 is fixedly connected to the inner wall of the telescopic rod 17 away from the connecting rod 16. An expansion insert 19 is slidably connected to the inner wall of the slide tube 18. The connecting socket 15 is inserted into the inner wall of the insert block 12, and then the telescopic rod 17 is pulled to extend or retract, which drives the slide tube 18 to adjust its position. Finally, the expansion insert 19 is aligned with the horizontal position of the inner hole 14 of the insert rod. Then, the expansion insert 19 is pushed along the inner wall of the inner hole 14 of the insert rod. When the expansion... After the insertion rod 19 is fully pushed into the insertion rod inner hole 14, the expansion insertion rod 19 is thermally expanded. At this time, the tensile force generated by the extension rod 17 provides external stability to the outside of the device. After the expansion insertion rod 19 is thermally expanded, it exerts stronger internal stress on the inner wall of the insertion rod inner hole 14, thereby increasing the internal stress of the insertion rod 13 when it is inserted into the insertion hole block 11, and enhancing the stability of the inner wall of the device. There are two connecting rods 16, which are symmetrically distributed on the surface of the connecting socket 15. There are two sliding tubes 18, which are symmetrically distributed on the surface of the extension rod 17. The surface of the expansion insertion rod 19 is slidably connected to the inner wall of the insertion rod inner hole 14.

[0026] The heat-fitting stabilizing component 2 includes a vertical plate 24, and two sleeves 21 whose surfaces contact the surface of the base 9 near the connecting steel pipe 8. The two sleeves 21 are symmetrically distributed around the surface of the connecting steel pipe 8. There are also two fixing blocks 23, which are symmetrically distributed around the end faces of the sleeves 21. The surfaces of the fixing blocks 23 are inserted into the inner wall of the insertion block 11, and the surfaces of the other set of fixing blocks 23 are inserted into the inner wall of the insertion rod block 12. There are four vertical plates 24, which are divided into two groups of two. The two groups of vertical plates 24 are symmetrically distributed around the surface of the connecting steel pipe 8, and the vertical plates 24 in each group are symmetrically distributed around the surface of the sleeves 21.

[0027] A clamping tube 25 is fixedly connected to the surface of the upright plate 24 near the support plate 22. A clamping post 26 is clamped to the inner wall of the clamping tube 25. A crossbar 27 is fixedly connected to the surface of the upright plate 24 near the clamping tube 25. A fixing plate 28 is inserted into the surface of the crossbar 27 near the support plate 22. After the sleeve 21 is stable, the upright plate 24 is held and the crossbar 27 is pushed so that the crossbar 27 completely penetrates the surface of the insertion block 11 and the support plate 22. Finally, when the upright plate 24 drives the clamping tube 25 to complete the clamping with the clamping post 26, the position of the upright plate 24 is fixed. Then, the fixing plate 28 is inserted along the surface of the penetrating crossbar 27, along with the upright plate. 24. The crossbar 27 is fixed. The connection between the insertion block 11 and the insertion rod block 12 and the two sleeves 21 enhances the overall stability between the welded component 1 and the heat-fixed stabilizing component 2 of the device. The end face of the clamping post 26 away from the clamping tube 25 is fixedly connected to the surface of the insertion block 11. The end face of the other set of clamping posts 26 away from the clamping tube 25 is fixedly connected to the surface of the insertion rod block 12. The surface of the fixing plate 28 penetrates the surface of the insertion block 11 and the support plate 22 and is slidably connected to the surface of the insertion block 11 and the support plate 22. There are four crossbars 27. The four crossbars 27 are symmetrically distributed around the center of the surface of the upright plate 24.

[0028] The anti-fall component 3 includes an inner groove 34. A fixing spring 35 is fixedly connected to the surface of the inner groove 34. A sliding telescopic rod 36 is fixedly connected to one end face of the fixing spring 35 within the inner groove 34. Pulling the connecting groove plate 37 will cause the sliding telescopic rod 36 to slide along the surface of the inner groove 34. The sliding telescopic rod 36 will compress the fixing spring 35, causing the fixing spring 35 to generate a reverse elastic force. This force ultimately acts on the sliding fixed plate 38, causing the sliding fixed plate 38 to generate an elastic thrust on the surface of the mudguard, enhancing the external fixing force of the mudguard surface and preventing the mudguard from falling off. The positioning plate 31 is away from the mudguard. One end face of the positioning rod 32 is fixedly connected to the surface of the bracket plate 6. There are two positioning rods 32, which are symmetrically distributed around the surface of the positioning plate 31. The surface of the outer fixed plate 33 near the positioning plate 31 is in contact with the surface of the bracket plate 6. There are two inner grooves 34, which are equidistantly distributed along the surface of the outer fixed plate 33. There are two fixing springs 35, which are symmetrically distributed around the surface of the inner grooves 34. The surface of the sliding telescopic rod 36 near the fixing spring 35 is slidably connected to the inner wall of the inner groove 34.

[0029] A connecting groove plate 37 is fixedly connected to the end face of the sliding telescopic rod 36 away from the fixed spring 35. A sliding fixed plate 38 is slidably connected to the inner wall of the connecting groove plate 37 away from the sliding telescopic rod 36. A rotating rod 39 is fixedly connected to the surface of the connecting groove plate 37 near the sliding telescopic rod 36. A rotating plate 40 is rotatably connected to the surface of the rotating rod 39. A clamping plate 41 is fixedly connected to the surface of the rotating plate 40 away from the rotating rod 39. After the mudguard is installed, the connecting groove plate 37 is pulled along the inner wall of the outer fixed plate 33 to the surface of the mudguard, and then slid. The sliding plate 38 is pushed onto the surface of the mudguard. Then the connecting groove plate 37 is released, and the rotating plate 40 is rotated along the surface of the rotating rod 39. Then the clamping plate 41 is stretched and pulled to the end face of the sliding plate 38 to fix the end face of the sliding plate 38 and prevent the mudguard from falling off due to the sliding plate 38, which would affect the use of the device. The surface of the connecting groove plate 37 slides along the inner wall of the outer plate 33. There are two rotating rods 39, which are symmetrically distributed on the surface of the connecting groove plate 37.

[0030] A commercial vehicle mudguard base structure and its manufacturing process adapted for friction welding include the following steps: S1: Base structure optimization: The original mudguard base, forged from Q355 material, was replaced with a cast base made of QT800-5 high-grade ductile iron. A high-precision inner hole was machined at the welding connection end of the casting base. The dimensional accuracy and coaxiality of the inner hole are compatible with the transition connection steel pipe for subsequent assembly, ensuring the tightness of the assembly. S2: Design of transitional steel pipe with variable diameter: The transitional steel pipe is made of the same seamless steel pipe as the mudguard bracket support steel pipe. The transitional steel pipe has a variable diameter structure. The hot fitting section is φ58*5. After the diameter is reduced, a friction welding section of φ51*5 is formed. This ensures the assembly and fitting requirements with the inner hole of the casting base, and also matches the welding area when welding with the φ50*4 support steel pipe, avoiding the impact of misalignment on the welding strength. S3: Design of transition steel pipe with variable diameter: The transition steel pipe is made of the same seamless steel pipe as the mudguard bracket support steel pipe. The transition steel pipe has a variable diameter structure. The hot fitting section is φ58*5. After the diameter is reduced, a friction welding section of φ51*5 is formed. This ensures the assembly and fitting requirements with the inner hole of the casting base, and also matches the welding area when welding with the φ50*4 support steel pipe, avoiding the impact of misalignment on the welding strength. S4: Friction welding connection process: After the transition connecting steel pipe and the casting base are thermally fixed, the φ50*4 support steel pipe of the mudguard bracket and the φ51*5 friction welding section of the transition connecting steel pipe on the base are coaxially connected. The two steel pipes of the same material are friction welded using the existing friction welding process to form an integral mudguard bracket. S5: Process Adaptation Requirements: The inner hole of the welding end of the casting base is machined to a high-precision dimension to match the φ58*5 hot fitting section. The φ515 friction welding section of the transition connecting steel pipe and the inner hole of the casting base adopt a heavy-duty interference fit of 0.071~0.097mm. The length of the transition connecting steel pipe is based on meeting the friction welding operation space and covering the welding stress area of ​​the base. The transition connecting steel pipe and the inner hole of the casting base adopt local induction heating for hot fitting. The heating temperature is controlled at 350~400℃. After local heating, the transition connecting steel pipe is coaxially pressed in and naturally cooled to room temperature to achieve mechanical fastening.

[0031] In use, when the device is installed, the insertion block 11 and the insertion rod block 12 are placed along the surface of the friction welding ring 7 inside the welded component 1. At the same time, the insertion rod 13 is slid into the inner wall of the insertion block 11 to stabilize the surface of the friction welding ring 7 with the insertion block 11 and the insertion rod block 12, thereby increasing the stress at the weld and extending the service life. Then, the connecting socket 15 is inserted into the inner wall of the insertion rod block 12, and then the telescopic rod 17 is pulled to extend and retract, thereby driving the slide tube 18 to adjust its position, and finally expanding the insertion rod 19. Align the expansion rod 19 with the horizontal position of the inner hole 14 of the insertion rod, and then push the expansion rod 19 along the inner wall of the inner hole 14. After the expansion rod 19 is fully pushed into the inner hole 14 of the insertion rod, the expansion rod 19 is thermally expanded. At this time, the tensile force generated by the extension rod 17 provides external stability to the outside of the device. After the expansion rod 19 is thermally expanded, it exerts stronger internal stress on the inner wall of the inner hole 14 of the insertion rod, thereby increasing the internal stress of the insertion rod 13 when it is inserted into the insertion block 11, and enhancing the stability of the inner wall of the device. At this time, within the heat-fixed stabilizing component 2, during the installation of the welded component 1, the two sleeves 21 are inserted into the corresponding insertion holes 11 and insertion rod blocks 12 via the fixing block 23. Alternatively, the two sleeves 21 can be rotated 90 degrees, allowing the fixing block 23 to be cross-inserted into the insertion holes 11 and support plate 22, thus stabilizing the sleeves 21. The sleeves 21 then provide external stabilization to the contact area between the connecting steel pipe 8 and the base 9, enhancing the thermal expansion stability of the device at this location and increasing the device's service life. Once the sleeves 21 are stabilized... Holding the upright plate 24, push the crossbar 27 so that the crossbar 27 completely penetrates the surface of the insertion block 11 and the support plate 22. Finally, when the upright plate 24 drives the clamping tube 25 to complete the clamping with the clamping post 26, the position of the upright plate 24 is fixed. Then, insert the fixing plate 28 along the surface of the through crossbar 27, and fix the crossbar 27 together with the upright plate 24. Through the connection of the insertion block 11 and the insertion rod block 12 with the two sleeves 21, the overall stability between the welded component 1 and the heat-fixed stabilizing component 2 of the device is enhanced. At this time, inside the anti-fall component 3, when the device is installed, the positioning plate 31 and positioning rod 32 can be used to quickly position the device, making the installation of the device more convenient. After the mudguard is installed, pull the connecting groove plate 37 along the inner wall of the outer fixed plate 33 to the surface of the mudguard, and then slide the sliding fixed plate 38 to push the sliding fixed plate 38 to the surface of the mudguard. Then release the connecting groove plate 37. At this time, pulling the connecting groove plate 37 will drive the sliding telescopic rod 36 to slide along the surface of the inner groove 34. 6 will compress the fixed spring 35, which will generate a reverse elastic force, ultimately acting on the sliding plate 38. This will cause the sliding plate 38 to generate an elastic thrust on the mudguard surface, enhancing the external fixing force on the mudguard surface and preventing the mudguard from falling off. Then, the rotating plate 40 will rotate along the surface of the rotating rod 39, and then the clamping plate 41 will be stretched, pulling the clamping plate 41 to the end face of the sliding plate 38, fixing the end face of the sliding plate 38, and preventing the sliding plate 38 from sliding and causing the mudguard to fall off, thus affecting the use of the device.

[0032] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A commercial vehicle mudguard base structure and its process adapted for friction welding, comprising a support tube (4), wherein a connecting sheet metal (5) is fixedly connected to the end face of the support tube (4), a support plate (6) is fixedly connected to the surface of the support tube (4), and a friction welding ring (7) is fixedly connected to the end face of the support tube (4) away from the connecting sheet metal (5), characterized in that, Also includes: The welding component (1) includes a socket block (11), and a plug block (12) is provided on the surface of the socket block (11). A plug rod (13) is fixedly connected to the surface of the plug rod block (12) near the socket block (11). The heat-fitting stabilizing component (2) includes a sleeve (21), a support plate (22) is fixedly connected to the surface of the sleeve (21), and a fixing block (23) is fixedly connected to the end face of the sleeve (21) near the support plate (22). The anti-drop component (3) includes a positioning plate (31), a positioning rod (32) is fixedly connected to the surface of the positioning plate (31), and an outer fixing plate (33) is fixedly connected to the surface of the positioning plate (31) near the positioning rod (32).

2. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 1, characterized in that: A connecting steel pipe (8) is fixedly connected to the end face of the friction welding ring (7) away from the support tube (4). A base (9) is fixedly connected to the surface of the connecting steel pipe (8) away from the friction welding ring (7). There are two support plates (6), which are symmetrically distributed on the surface of the support tube (4).

3. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 2, characterized in that: The welding component (1) includes an inner hole (14) for inserting rods. The surface of the insertion hole block (11) near the insertion rod block (12) is in contact with the surface of the insertion rod block (12) near the insertion rod (13). The surface of the insertion rod (13) is slidably connected to the inner wall of the insertion hole block (11). There are four insertion rods (13). The four insertion rods (13) are divided into two groups, and each group has two insertion rods. The two groups of insertion rods (13) are symmetrically distributed on the surface of the insertion rod block (12). Each group of insertion rods (13) is symmetrically distributed on the surface of the insertion rod block (12).

4. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 3, characterized in that: A connecting socket (15) is inserted into the surface of the plug block (12) near the inner hole (14) of the plug. A connecting rod (16) is fixedly connected to the surface of the connecting socket (15). A telescopic rod (17) is fixedly connected to the surface of the connecting rod (16) away from the connecting socket (15). A sliding tube (18) is fixedly connected to the inner wall of the telescopic rod (17) away from the connecting rod (16). An expansion plug (19) is slidably connected to the inner wall of the sliding tube (18). There are two connecting rods (16), which are symmetrically distributed on the surface of the connecting socket (15). There are two sliding tubes (18), which are symmetrically distributed on the surface of the telescopic rod (17). The surface of the expansion plug (19) is slidably connected to the inner wall of the inner hole (14) of the plug.

5. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 4, characterized in that: The heat-fixed stabilizing component (2) includes a vertical plate (24). The surface of the sleeve (21) is in contact with the surface of the base (9) near the connecting steel pipe (8). There are two sleeves (21). The two sleeves (21) are symmetrically distributed with respect to the surface of the connecting steel pipe (8). There are two fixing blocks (23). The two fixing blocks (23) are symmetrically distributed with respect to the end faces of the sleeves (21). The surface of the fixing blocks (23) is inserted into the inner wall of the insertion block (11). The surface of the other set of fixing blocks (23) is inserted into the inner wall of the insertion rod block (12). There are four vertical plates (24). The four vertical plates (24) are divided into two groups, and each group has two vertical plates. The two groups of vertical plates (24) are symmetrically distributed with respect to the surface of the connecting steel pipe (8). Each group of vertical plates (24) is symmetrically distributed with respect to the surface of the sleeves (21).

6. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 5, characterized in that: A clamping tube (25) is fixedly connected to the surface of the upright plate (24) near the support plate (22). A clamping post (26) is clamped to the inner wall of the clamping tube (25). A crossbar (27) is fixedly connected to the surface of the upright plate (24) near the clamping tube (25). A fixing plate (28) is inserted into the surface of the crossbar (27) near the support plate (22). The end face of the clamping post (26) away from the clamping tube (25) is fixedly connected to the surface of the insertion block (11). The end face of another set of clamping posts (26) away from the clamping tube (25) is fixedly connected to the surface of the insertion rod block (12). The surface of the fixing plate (28) penetrates the surface of the insertion block (11) and the support plate (22) and is slidably connected to the surface of the insertion block (11) and the support plate (22). There are four crossbars (27), which are symmetrically distributed around the center of the surface of the upright plate (24).

7. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 6, characterized in that: The anti-drop component (3) includes an inner groove (34), a fixed spring (35) is fixedly connected to the surface of the inner groove (34), a sliding telescopic rod (36) is fixedly connected to the end face of one end of the inner groove (34) of the fixed spring (35), the end face of the positioning plate (31) away from the positioning rod (32) is fixedly connected to the surface of the support plate (6), there are two positioning rods (32), the two positioning rods (32) are symmetrically distributed on the surface of the positioning plate (31), the surface of the outer fixed plate (33) near the positioning plate (31) is in contact with the surface of the support plate (6), there are two inner grooves (34), the two inner grooves (34) are equidistantly distributed along the surface of the outer fixed plate (33), there are two fixed springs (35), the two fixed springs (35) are symmetrically distributed on the surface of the inner groove (34), and the surface of the sliding telescopic rod (36) near the fixed spring (35) is slidably connected to the inner wall of the inner groove (34).

8. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 7, characterized in that: The end face of the sliding telescopic rod (36) away from the fixed spring (35) is fixedly connected to a connecting groove plate (37). The inner wall of the connecting groove plate (37) away from the sliding telescopic rod (36) is slidably connected to a sliding fixed plate (38). The surface of the connecting groove plate (37) near the sliding telescopic rod (36) is fixedly connected to a rotating rod (39). The surface of the rotating rod (39) is rotatably connected to a rotating plate (40). The surface of the rotating plate (40) away from the rotating rod (39) is fixedly connected to a clamping plate (41). The surface of the connecting groove plate (37) slides along the inner wall of the outer fixed plate (33). There are two rotating rods (39), which are symmetrically distributed on the surface of the connecting groove plate (37).

9. The structure and process of a commercial vehicle mudguard base adapted for friction welding as described in claim 8, characterized in that, Includes the following steps: S1: Base structure optimization: The original mudguard base, forged from Q355 material, was replaced with a cast base made of QT800-5 high-grade ductile iron. A high-precision inner hole was machined at the welding connection end of the casting base. The dimensional accuracy and coaxiality of the inner hole are compatible with the transition connection steel pipe for subsequent assembly, ensuring the tightness of the assembly. S2: Design of transitional steel pipe with variable diameter: The transitional steel pipe is made of the same seamless steel pipe as the mudguard bracket support steel pipe. The transitional steel pipe has a variable diameter structure. The hot fitting section is φ58*5. After the diameter is reduced, a friction welding section of φ51*5 is formed. This ensures the assembly and fitting requirements with the inner hole of the casting base, and also matches the welding area when welding with the φ50*4 support steel pipe, avoiding the impact of misalignment on the welding strength. S3: Design of transition steel pipe with variable diameter: The transition steel pipe is made of the same seamless steel pipe as the mudguard bracket support steel pipe. The transition steel pipe has a variable diameter structure. The hot fitting section is φ58*5. After the diameter is reduced, a friction welding section of φ51*5 is formed. This ensures the assembly and fitting requirements with the inner hole of the casting base, and also matches the welding area when welding with the φ50*4 support steel pipe, avoiding the impact of misalignment on the welding strength. S4: Friction welding connection process: After the transition connecting steel pipe and the casting base are thermally fixed, the φ50*4 support steel pipe of the mudguard bracket and the φ51*5 friction welding section of the transition connecting steel pipe on the base are coaxially connected. The two steel pipes of the same material are friction welded using the existing friction welding process to form an integral mudguard bracket. S5: Process Adaptation Requirements: The inner hole of the welding end of the casting base is machined to a high-precision dimension to match the φ58*5 hot fitting section. The φ515 friction welding section of the transition connecting steel pipe and the inner hole of the casting base adopt a heavy-duty interference fit of 0.071~0.097mm. The length of the transition connecting steel pipe is based on meeting the friction welding operation space and covering the welding stress area of ​​the base. The transition connecting steel pipe and the inner hole of the casting base adopt local induction heating for hot fitting. The heating temperature is controlled at 350~400℃. After local heating, the transition connecting steel pipe is coaxially pressed in and naturally cooled to room temperature to achieve mechanical fastening.

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