Machining center for tower crane assembly part

Abstract

The invention relates to the technical field of tower crane standard knot machining, and discloses a tower crane assembly part machining center which is characterized in that a conveying mechanism is used for conveying a main chord member to a machining station in the center line direction of the main chord member and positioning and clamping the main chord member on the machining station; the multi-station machining platforms are arranged on the two sides of the conveying mechanism, the machining stations are arranged on the multi-station machining platforms and comprise the first station and the second station, and different operation units are arranged on the first station and the second station respectively; when machining is carried out on the first station or the second station, the operation units arranged on the corresponding stations can work synchronously. According to the machining center for the tower crane assembly part, multi-station machining is carried out on the welded main chord member, deformation caused by welding after machining is prevented, the attachment degree of the connecting faces is improved, the connecting stability of all parts of a standard knot is improved, and the machining efficiency is improved through multi-station layout.

Description

Technical Field

[0001] This invention relates to the field of tower crane standard section processing technology, and more specifically, to a processing center for tower crane assemblies. Background Technology

[0002] Tower crane standard sections are core steel structure components of cranes, tower cranes, and other lifting equipment, mainly composed of main chord members (such as...). Figure 12 (As shown) and the web members are connected to form a frame structure to enhance the stability and safety of the equipment.

[0003] Traditional tower crane standard section main chords employ a "drill first, then weld" process: holes are first drilled individually using drilling and boring equipment, then welded together, and finally assembled using pin connections. This process has the following problems: Uneven heat input during welding causes deformation of the angle steel, resulting in displacement of the holes on the standard section and misalignment of multiple standard sections during bolt connection (typical misalignment error ≥0.5mm). The fit of the connecting surfaces is poor, and there is obvious misalignment. The gaps between the layers after assembly cause the connecting bolts to bear additional shear stress, affecting the structural strength and safety.

[0004] Therefore, it is necessary to propose a machining center for tower crane assemblies to solve the problems existing in the prior art. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To address the aforementioned problems, this invention provides a machining center for tower crane assemblies, used for machining the welded main chord members, comprising: The conveying mechanism is used to transport the main chord along its centerline to the processing station, and to position and clamp the main chord at the processing station; A multi-station processing platform is set on both sides of the conveying mechanism. The processing stations are set on the multi-station processing platform. The processing stations include station one and station two. Different work units are set on station one and station two respectively. When processing is carried out at station one or station two, the work units set up at the corresponding station can work synchronously.

[0007] Preferably, the work unit at station one includes a left end face cutting unit, a first main hole cutting unit, a multi-axis machining unit, and a second main hole cutting unit arranged in sequence, and the work unit at station two includes an auxiliary hole machining unit and a right end face machining unit. The left end face cutting unit, the first main hole cutting unit, the multi-axis machining unit, the second main hole cutting unit, the auxiliary hole machining unit, and the right end face machining unit are arranged sequentially on one or both sides of the conveying mechanism along the length of the conveying mechanism.

[0008] Preferably, the left end face cutting unit is used to cut the left end face of the main chord, and the machined left end face forms the positioning reference for subsequent machining; The first main hole cutting unit is used to machine the first main hole at the left end of the main chord. Multi-axis machining units are used to machine arrayed holes; The second main hole cutting unit is used to machine the second main hole at the right end of the main chord. The auxiliary hole machining unit is used to machine auxiliary holes; The right end face machining unit is used to cut the right end face of the main chord.

[0009] Preferably, each station of the multi-station machining platform is provided with a machining base, a wedge-shaped base is provided on the machining base, the working unit is provided on the wedge-shaped base, and the machining base is slidably mounted on the multi-station machining platform, with the sliding direction perpendicular to the length direction of the multi-station machining platform.

[0010] Preferably, the conveying mechanism includes a conveying unit and a clamping unit. The conveying unit includes a conveying base, guide rails, and a conveying bracket. The two guide rails are arranged parallel to each other on the top surface of the conveying base, and the conveying bracket is slidably arranged on the guide rails. The guide rails are parallel to the length direction of the multi-station processing platform.

[0011] Preferably, the clamping unit includes a lifting assembly, a clamping head, and a clamping seat. The lifting assembly and the clamping seat are mounted on the conveying bracket, and the clamping head is mounted on the power end of the lifting assembly. A space for clamping the main chord is formed between the clamping head and the clamping seat.

[0012] Preferably, it also includes a feeding mechanism, which is located at the front end of the conveying mechanism and is used to transport the main chord rod to the conveying mechanism. The feeding mechanism includes a feeding base, a feeding bracket is provided on the feeding base, the main chord rod is stacked on the feeding bracket, and a limit switch is provided on the upper part of the feeding bracket. The trigger position of the limit switch corresponds to the feeding position of the uppermost main chord rod.

[0013] Preferably, the feeding mechanism further includes a main chord lifting assembly, which includes a bracket and a lifting drive component. The bracket is disposed on the bottom surface of the feeding bracket, and a longitudinal through slot is opened on the side of the feeding bracket. The lifting drive component is disposed on the side of the feeding bracket, and the bracket passes through the through slot and is connected to the power end of the lifting drive component.

[0014] Preferably, the feeding mechanism further includes a push rod assembly. The push rod assembly is used to push the main chord rod onto the conveying mechanism after the main chord rod reaches the feeding position. The push rod assembly includes a push rod, a first rack, a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a second rack, and an intermediate gear. The first rack is slidably mounted on the side wall of the feeding bracket. The push rod is mounted on the first rack and is used to push the main chord rod at the feeding position. The second rack is connected to the bracket. The first rack is connected to the second rack through the first gear, the intermediate gear, the second gear, the third gear, the fourth gear, and the fifth gear.

[0015] Preferably, the first gear is rotatably mounted on the gear shaft, the gear shaft is slidably mounted in the groove, the groove is opened on the outer wall of the feeding bracket, one end of the first spring is connected to the side wall of the groove near the conveying mechanism, and the other end of the first spring is connected to the gear shaft; The end of the feeding bracket away from the conveying mechanism is connected to one end of the second spring, and the other end of the second spring is connected to the end of the first rack away from the conveying mechanism. A slot is opened on the top surface of the feeding bracket, and a block is slidably set in the slot. The block is slidably set in the slot. A third spring is set in the slot. The lower end of the third spring is connected to the bottom surface of the slot, and the upper end of the third spring is connected to the lower end surface of the block.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The tower crane assembly machining center of the present invention performs multi-station machining on the welded main chord, preventing deformation caused by welding after machining, improving the fit of the connection surface, increasing the stability of the connection of each component of the standard section, and improving machining efficiency through multi-station layout.

[0017] The machining center for tower crane assembly described in this invention, and other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the machining center for the tower crane assembly disclosed in this invention; Figure 2 This is a top view of the machining center for the tower crane assembly disclosed in this invention; Figure 3 This is a side view of the machining center of the tower crane assembly disclosed in this invention; Figure 4This is a schematic diagram of the conveying mechanism disclosed in this invention; Figure 5 This is a schematic diagram of the feeding mechanism disclosed in this invention; Figure 6 This is a schematic diagram of the structure of the gear shaft disclosed in this invention; Figure 7 This is a schematic diagram of the card slot and card block disclosed in this invention; Figure 8 This is a schematic diagram of the initial position of the feeding mechanism disclosed in this invention; Figure 9 This is a schematic diagram of the structure of the feeding bracket disclosed in this invention; Figure 10 This is a schematic diagram of the push rod and the first rack disclosed in this invention; Figure 11 This is a schematic diagram of the structure of the support disclosed in this invention; Figure 12 A schematic diagram of the main chord.

[0019] The components include: 1. Conveying mechanism; 2. Multi-station machining platform; 3. Station 1; 4. Station 2; 5. Left end face cutting unit; 6. First main hole cutting unit; 7. Multi-axis machining unit; 8. Second main hole cutting unit; 9. Auxiliary hole machining unit; 10. Right end face machining unit; 11. Machining base; 12. Wedge base; 13. Conveying unit; 131. Conveying base; 132. Guide rail; 133. Conveying bracket; 14. Clamping unit; 141. Lifting assembly; 142. Fixture head; 14... 3. Fixture base; 17. Loading base; 18. Loading bracket; 19. Limit switch; 20. Bracket; 21. Lifting drive component; 22. Through slot; 23. Push rod; 24. First rack; 25. First gear; 26. Second gear; 27. Third gear; 28. Fourth gear; 29. ​​Fifth gear; 30. Second rack; 31. Gear shaft; 32. Groove; 33. First spring; 34. Second spring; 35. Slot; 36. Block; 37. Third spring; 38. Intermediate gear. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0021] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0022] like Figures 1-11 As shown, the present invention provides a machining center for tower crane assembly components, used for machining the welded main chord 100, comprising: The conveying mechanism 1 is used to convey the main chord 100 along its centerline to the processing station, and to position and clamp the main chord 100 at the processing station. The multi-station processing platform 2 is set on both sides of the conveying mechanism 1. The processing stations are set on the multi-station processing platform 2. The processing stations include station 1 3 and station 2 4. Different work units are set on station 1 3 and station 2 4 respectively. When processing is performed at station 3 or station 4, the work units set up at the corresponding stations can work synchronously.

[0023] Furthermore, the work unit on station 1 3 includes a left end face cutting unit 5, a first main hole cutting unit 6, a multi-axis machining unit 7, and a second main hole cutting unit 8 arranged in sequence, and the work unit on station 2 4 includes an auxiliary hole machining unit 9 and a right end face machining unit 10. The left end face cutting unit 5, the first main hole cutting unit 6, the multi-axis machining unit 7, the second main hole cutting unit 8, the auxiliary hole machining unit 9, and the right end face machining unit 10 are arranged sequentially on one or both sides of the conveying mechanism 1 along the length direction of the conveying mechanism 1.

[0024] Furthermore, the left end face cutting unit 5 is used to cut the left end face of the main chord 100, and the machined left end face forms the positioning reference for subsequent machining; The first main hole cutting unit 6 is used to machine the first main hole 101 at the left end of the main chord 100; The multi-axis machining unit 7 is used to machine the array holes 102; The second main hole cutting unit 8 is used to machine the second main hole 103 at the right end of the main chord 100; The auxiliary hole machining unit 9 is used to machine the auxiliary hole 104; The right end face machining unit 10 is used to cut the right end face of the main chord 100.

[0025] Furthermore, each station of the multi-station machining platform 2 is provided with a machining base 11, and a wedge-shaped base 12 is provided on the machining base 11. The working unit is set on the wedge-shaped base 12, and the machining base 11 is slidably set on the multi-station machining platform 2. The sliding direction is perpendicular to the length direction of the multi-station machining platform 2.

[0026] Furthermore, the conveying mechanism 1 includes a conveying unit 13 and a clamping unit 14. The conveying unit 13 includes a conveying base 131, a guide rail 132 and a conveying bracket 133. The two guide rails 132 are arranged parallel to each other on the top surface of the conveying base 131, and the conveying bracket 133 is slidably arranged on the guide rails 132. The guide rails 132 are parallel to the length direction of the multi-station processing platform 2.

[0027] Furthermore, the clamping unit 14 includes a lifting assembly 141, a clamping head 142, and a clamping seat 143. The lifting assembly 141 and the clamping seat 143 are mounted on the conveying bracket 133. The clamping head 142 is mounted on the power end of the lifting assembly 141. A space for clamping the main chord 100 is formed between the clamping head 142 and the clamping seat 143.

[0028] Furthermore, it also includes a feeding mechanism, which is located at the front end of the conveying mechanism 1 and is used to transport the main chord 100 onto the conveying mechanism 1. The feeding mechanism includes a feeding base 17, a feeding bracket 18 is provided on the feeding base 17, the main chord 100 is stacked on the feeding bracket 18, and a limit switch 19 is provided on the upper part of the feeding bracket 18. The trigger position of the limit switch 19 corresponds to the feeding position of the uppermost main chord 100.

[0029] Furthermore, the feeding mechanism also includes a main chord 100 lifting assembly, which includes a bracket 20 and a lifting drive 21. The bracket 20 is disposed on the bottom surface of the feeding bracket 18, and a longitudinal through groove 22 is opened on the side of the feeding bracket 18. The lifting drive 21 is disposed on the side of the feeding bracket 18, and the bracket 20 passes through the through groove 22 and is connected to the power end of the lifting drive 21.

[0030] Furthermore, the feeding mechanism also includes a push rod assembly. The push rod assembly is used to push the main chord 100 onto the conveying mechanism 1 after the main chord 100 reaches the feeding position. The push rod assembly includes a push rod 23, a first rack 24, a first gear 25, a second gear 26, a third gear 27, a fourth gear 28, a fifth gear 29, a second rack 30, and an intermediate gear 38. The first rack 24 is slidably disposed on the side wall of the feeding bracket 18. The push rod 23 is disposed on the first rack 24. The push rod 23 is used to push the main chord 100 at the feeding position. The second rack 30 is connected to the bracket 20. The first rack 24 is connected to the second rack 30 through the first gear 25, the intermediate gear 38, the second gear 26, the third gear 27, the fourth gear 28, and the fifth gear 29.

[0031] Furthermore, the first gear 25 is rotatably mounted on the gear shaft 31, the gear shaft 31 is slidably mounted in the groove 32, the groove 32 is opened on the outer wall of the feeding bracket 18, the side wall of the groove 32 near the conveying mechanism 1 is connected to one end of the first spring 33, and the other end of the first spring 33 is connected to the gear shaft 31. One end of the feeding bracket 18 away from the conveying mechanism 1 is connected to one end of the second spring 34, and the other end of the second spring 34 is connected to the end of the first rack 24 away from the conveying mechanism 1. A slot 35 is opened on the top surface of the feeding bracket 18, and a block 36 is slidably arranged in the slot 35. The block 36 is slidably arranged in the slot 35. A third spring 37 is arranged in the slot 35. The lower end of the third spring 37 is connected to the bottom surface of the slot 35, and the upper end of the third spring 37 is connected to the lower end surface of the block 36.

[0032] The working principle of the above technical solution: A machining center for tower crane assembly components, used for machining the welded main chord 100, includes: The conveying mechanism 1 is used to convey the main chord 100 along its centerline to the processing station, and to position and clamp the main chord 100 at the processing station. The multi-station processing platform 2 is set on both sides of the conveying mechanism 1. The processing stations are set on the multi-station processing platform 2. The processing stations include station 1 3 and station 2 4. Different work units are set on station 1 3 and station 2 4 respectively. When processing is performed at station 3 or station 4, the work units at station 3 or station 4 operate synchronously. When the main chord 100 is at station 3, the left end face, the first main hole 101, the second main hole 103 and the array hole 102 are processed synchronously. When it is at station 4, the auxiliary hole 104 and the right end face are processed synchronously.

[0033] The left end face of the processed main chord 100 serves as the positioning reference for positioning at station 2 4. After the main chord 100 is processed at station 1 3, the conveying mechanism 1 drives the main chord 100 to move towards station 2 4. The conveying mechanism 1 can use a servo motor to drive a ball screw or a gear rack, which drives the conveying bracket 133 to move along the guide rail 132. With the left end face of the processed main chord as the reference, the main chord 100 is conveyed to station 2 4 by controlling the movement distance through the preset coordinates of station 2 4 in the control system, the encoder built into the servo motor and the grating ruler installed on the side of the guide rail 132.

[0034] The feeding mechanism sequentially transports the welded main chord rod 100 to the conveying mechanism 1. The conveying mechanism 1 includes a conveying unit 13 and a clamping unit 14. The conveying unit 13 includes a conveying base 131, guide rails 132, and a conveying bracket 133. The two guide rails 132 are arranged parallel to each other on the top surface of the conveying base 131, and the conveying bracket 133 is slidably arranged on the guide rails 132. The guide rails 132 are parallel to the length direction of the multi-station processing platform 2. The clamping unit 14 includes a lifting assembly 141, a clamping head 142, and a clamping seat 143. The lifting assembly 141 and the clamping seat 143 are arranged on the conveying bracket 133, and the clamping head 142 is located at the power end of the lifting assembly 141. A space for clamping the main chord rod 100 is formed between the clamping head 142 and the clamping seat 143. The main chord rod 100 is V-shaped. The main chord 100 is placed into the conveying mechanism 1 and inverted on the upper part of the clamp head 142. The upper end of the clamp head 142 is adapted to the V-shape of the main chord 100. After the main chord 100 is conveyed onto the clamp head 142, the conveying bracket 133 moves along the length direction of the conveying mechanism 1. The center line of the main chord 100 is parallel to the length direction of the conveying mechanism 1. After the left end face of the main chord 100 reaches the predetermined position, the conveying bracket 133 stops. At this time, the power end of the lifting assembly 141 rises and presses the main chord 100 onto the clamp seat 143. The shape of the upper part of the clamp seat 143 is adapted to the shape of the upper part of the main chord 100. After the main chord 100 is clamped, the left end face cutting unit 5 cuts the left end face of the main chord 100. The left end face cutting unit 5 can be a milling machine.

[0035] The left end face of the processed main chord 100 serves as the positioning reference for subsequent processing. After cutting the left end face of the main chord 100, the power end of the lifting assembly 141 descends, and the conveying bracket 133 continues to move. Using the left end face of the main chord 100 as the positioning surface, the conveying bracket 133 stops when it reaches the processing position of each station. The lifting unit 14 repeats the clamping and releasing actions, so that the main chord 100 completes the corresponding processing at each station. The positioning position of each station is preset on the multi-station processing platform 2. When the left end face of the main chord 100 is aligned with the positioning position of each station, the conveying bracket 133 stops at each station for processing.

[0036] The first main hole cutting unit 6 is used to machine the first main hole 101 at the left end of the main chord 100; The multi-axis machining unit 7 is used to machine the array hole 102, which is used to connect the horizontal web member and the inclined web member. The second main hole cutting unit 8 is used to machine the second main hole 103 at the right end of the main chord 100; The auxiliary hole machining unit 9 is used to machine the auxiliary hole 104; The right end face machining unit 10 is used to cut the right end face of the main chord 100.

[0037] The first and second main holes are the connection holes between the assembled standard sections. The diameter of the first and second main holes is 55mm or 65mm. The array holes are the connection holes between the main chord 100 and the web members. The main holes between the main chord 100 of adjacent standard sections are connected by pins. The main chord 100 and the web members are connected by bolts through the array holes. The auxiliary holes are used to install and fix non-main load-bearing components, such as fixing maintenance walkway supports and platforms, or fixing cable or pipe brackets. The diameter of the auxiliary holes is 30mm or 35mm.

[0038] The first main hole, the second main hole, and the auxiliary holes are machined using a drilling and boring machine. The array holes are machined using a seven-axis linkage drilling and boring machine. After machining, the fixture is released, and the main chord rod 100 is sent out by the unloading mechanism to enter the next machining process.

[0039] Each station of the multi-station machining platform 2 is equipped with a machining base 11, and a wedge-shaped base 12 is installed on the machining base 11. The working unit is installed on the wedge-shaped base 12. The machining base 11 is slidably installed on the multi-station machining platform 2, and the sliding direction is perpendicular to the length direction of the multi-station machining platform 2. The working unit can slide along the wedge-shaped base 12, and the sliding direction is perpendicular to the length direction of the multi-station machining platform 2. The working unit is installed on the upper surface of the wedge-shaped base 12. The upper surface of the wedge-shaped base 12 is inclined downward along the direction close to the conveying mechanism 1, so that the tool of the machining unit is perpendicular to the machining surface of the main chord bar 100 placed in an inverted V shape. By adjusting the machining unit and the wedge-shaped base 12, different sizes of main chord bars 100 can be accommodated.

[0040] The conveying mechanism 1 includes a conveying unit 13 and a clamping unit 14. The conveying unit 13 includes a conveying base 131, a guide rail 132, and a conveying bracket 133. The two guide rails 132 are arranged parallel to each other on the top surface of the conveying base 131. The conveying bracket 133 is slidably arranged on the guide rails 132. The guide rails 132 are parallel to the length direction of the multi-station processing platform 2. The clamping unit includes a lifting assembly 141, a clamping head 142, and a clamping seat 143. The lifting assembly 141 and the clamping seat 143 are arranged on the conveying bracket 133. The clamping head 142 is arranged at the power end of the lifting assembly 141. A space for clamping the main chord 100 is formed between the clamping head 142 and the clamping seat 143. A driving unit is arranged on the conveying base 131 for driving the conveying bracket 133 to move along the guide rails 132.

[0041] It also includes a feeding mechanism, which is located at the front end of the conveying mechanism 1 and is used to transport the main chord rod 100 to the conveying mechanism 1. The feeding mechanism includes a feeding base 17, on which a feeding bracket 18 is provided. The main chord rods 100 are stacked on the feeding bracket 18. A limit switch 19 is provided on the upper part of the feeding bracket 18. The trigger position of the limit switch 19 corresponds to the feeding position of the uppermost main chord rod 100. The feeding position is at the same height as the initial position of the clamping head 142. The push rod 23 can push the main chord rod 100 from the feeding bracket 18 to the clamping head 142. When the push rod 23 pushes at least two-thirds of the main chord rod 100 onto the clamping head 142, the weight of the main chord rod 100 mainly presses on the clamping head 142. When the conveying bracket 133 drives the clamping head 142 to move, the main chord rod 100 can be transported to the processing station.

[0042] During loading, the main chord rods 100 are stacked on the loading bracket 18. At this time, the lifting drive 21 rises a certain distance, so that the uppermost main chord rod 100 contacts the trigger position of the limit switch 19, and the lifting drive 21 stops. During the lifting process, the lifting drive 21 drives the fifth gear 29 to rotate clockwise through the bracket 20 and the second rack 30. The second gear 26 and the third gear 27 are coaxially fixed. The diameter of the second gear 26 is larger than the diameter of the third gear 27. When the fifth gear 29 rotates clockwise, it drives the fourth gear 28 to rotate counterclockwise, thereby driving the third gear 27 and the second gear 26 to rotate clockwise. The second gear 26 drives the middle gear 38 to rotate counterclockwise, thereby driving the first gear 25 to rotate clockwise, thereby driving the first rack 24 to move to the right. When the first rack 24 moves, it stretches the second spring 34 to store energy. Since the diameter of the second gear 26 is larger than the diameter of the third gear 27, the movement distance of the first rack 24 can be increased. The transmission ratio of the entire gear set is set according to the ratio of the longitudinal distance between the two main chord rods 100 to the length of the main chord rod 100 when the main chord rod 100 is placed in an inverted V shape. When the second rack 30 pushes the longitudinal distance between the two adjacent main chord rods 100 upward, the first rack can move the length of the main chord rod 100. When the lifting drive 21 stops, the locking block 36 locks the push rod 23, so that the first rack 24 is locked. After the previous main chord rod 100 is processed, the locking block 36 is pressed down and the locking block 36 releases the push rod 23. The first rack 24 moves towards the conveying mechanism 1 under the action of the elastic force of the second spring 34. The push rod 23 pushes the main chord rod 100 to move towards the conveying mechanism. After the push rod 23 moves into place, the conveying mechanism 1 removes the main chord rod 100. At this time, the lifting drive 21 starts to push the bracket 20 upward, and pushes the stacked main chord rods 100 a certain distance again before contacting the limit switch 19 and stopping.

[0043] After the push rod 23 is released, the first rack 24 moves toward the conveying mechanism 1 under the elastic force of the second spring 34. At this time, the first rack 24 pushes the first gear 25. Since the second rack 30 is stationary and the intermediate gear 38 is stationary, the first gear 25 compresses the first spring 33 through the gear shaft 31. The gear shaft 31 moves to the left, causing the first gear 25 to disengage from the second gear 26. During the energy storage process, the second gear 26 rotates clockwise. When meshing, the force on the first gear 25 is to the right, which will not cause the gear shaft 31 to move to the left. The first rack 24 can be pushed to the right.

[0044] The upper end of the locking block 36 is wedge-shaped. When the first rack 24 moves to the right, the push rod 23 squeezes the upper end of the wedge, causing the locking block 36 to compress the third spring 37 downward. The locking block 36 enters the locking groove 35. After the push rod 23 passes, the locking block 36 moves upward under the elastic force of the third spring 37, locking the push rod 23.

[0045] When the support 20 rises to its highest position, the push rod 23 pushes out the lowest main chord 100. The power end of the rising drive 21 then descends, driving the support 20. At this time, the second rack 30 descends together with the power end of the rising drive 21. To prevent jamming between the second rack 30 and the first rack 24 when the second rack 30 rotates and drives the fifth gear 29, the gear shaft of the fifth gear 29 is set to be the same as the gear shaft 31 of the first gear 25, so that the gear shaft of the fifth gear 29 can move in the vertical direction. The spring is set at the lower part of the gear shaft of the fifth gear 29. When the second rack 30 moves downward, the second rack 30 applies downward pressure to the fifth gear 29. The fourth gear 28 remains stationary. The second rack 30 presses the fifth gear 29, thereby compressing the spring and causing the fifth gear 29 to disengage from the fourth gear 28. When the second rack 30 moves downward, the fifth gear 29 rotates independently, causing the second rack 30 to reset.

[0046] The feeding mechanism mainly consists of mechanical structures such as gears, racks, springs, cylinders, or hydraulic cylinders. Compared with the gripping and feeding of robotic arms, it has advantages such as low cost, reliable operation, fixed cycle time, compact structure, and simple maintenance. It runs smoothly and is suitable for the machining of main chord members. Although the development of automated robotic arms is rapid, due to their high cost, large space occupation, and the fact that the feeding of main chord members is not a precision machining process, mechanical transmission feeding mechanisms are more suitable for feeding main chord members.

[0047] The beneficial effects of the above technical solution are as follows: The tower crane assembly machining center of the present invention performs multi-station machining on the welded main chord, preventing deformation caused by welding after machining, improving the fit of the connection surface, increasing the stability of the connection of each component of the standard section, and improving machining efficiency through multi-station layout.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A machining center of a tower assembly for machining a post-welded main chord (100), characterized in that, The utility model relates to a kind of tower crane assembly processing center, including: Conveying mechanism (1) for conveying main chord (100) to processing station along its center line direction, and positioning and clamping main chord (100) on processing station; Multi-station processing platform (2) is arranged in the two sides of conveying mechanism (1), and processing station is arranged on multi-station processing platform (2), and processing station includes station one (3) and station two (4), and different operation units are respectively arranged on station one (3) and station two (4); When processing on station one (3) or station two (4), the operation unit arranged on the corresponding station can work synchronously.

2. The machining center of a tower assembly according to claim 1, characterized in that, The operation unit on station one (3) includes left end face cutting unit (5), first main hole cutting unit (6), multi-axis processing unit (7) and second main hole cutting unit (8) arranged in sequence, and the operation unit on station two (4) includes accessory hole processing unit (9) and right end face processing unit (10); Left end face cutting unit (5), first main hole cutting unit (6), multi-axis processing unit (7), second main hole cutting unit (8), accessory hole processing unit (9) and right end face processing unit (10) are arranged in sequence on one side or both sides of conveying mechanism (1) along the length direction of conveying mechanism (1).

3. The processing center of the tower crane assembly according to claim 2, wherein Left end face cutting unit (5) is used for cutting the left end face of main chord (100), and the processed left end face forms the positioning reference for subsequent processing; First main hole cutting unit (6) is used for processing the first main hole (101) at the left end of main chord (100); Multi-axis processing unit (7) is used for processing array hole (102); Second main hole cutting unit (8) is used for processing the second main hole (103) at the right end of main chord (100); Accessory hole processing unit (9) is used for processing accessory hole (104); Right end face processing unit (10) is used for cutting the right end face of main chord (100).

4. The machining center of a tower assembly according to claim 3, characterized in that Processing base (11) is arranged on each station of multi-station processing platform (2), wedge-shaped base (12) is arranged on processing base (11), operation unit is arranged on wedge-shaped base (12), and processing base (11) is slidingly arranged on multi-station processing platform (2), and the sliding direction is perpendicular to the length direction of multi-station processing platform (2).

5. The machining center of a tower assembly according to claim 1, characterized in that, Conveying mechanism (1) includes conveying unit (13) and clamping unit (14), conveying unit (13) includes conveying base (131), guide rail (132) and conveying support (133), two guide rails (132) are arranged in parallel on the top surface of conveying base (131), and conveying support (133) is slidingly arranged on guide rail (132), and guide rail (132) is parallel to the length direction of multi-station processing platform (2).

6. The machining center of a tower assembly according to claim 5, characterized in that Clamping unit (14) includes lifting assembly (141), clamp head (142) and clamp seat (143), lifting assembly (141) and clamp seat (143) are arranged on conveying support (133), clamp head (142) is arranged on the power end of lifting assembly (141), and the space for clamping main chord (100) is formed between clamp head (142) and clamp seat (143).

7. The machining center of a tower assembly according to claim 1, characterized in that, The feeding mechanism is arranged at the front end of the conveying mechanism (1) and used for conveying the main chord rod (100) to the conveying mechanism (1). The feeding mechanism comprises a feeding base (17), a feeding support (18) arranged on the feeding base (17), and the main chord rod (100) is stacked and placed on the feeding support (18). A travel switch (19) is arranged on the upper portion of the feeding support (18), and the triggering position of the travel switch (19) corresponds to the feeding position of the uppermost main chord rod (100).

8. A machining center of a tower assembly according to claim 7, characterized in that The feeding mechanism further comprises a main chord rod lifting assembly. The main chord rod lifting assembly comprises a support (20) and a lifting driving element (21). The support (20) is arranged on the bottom surface of the feeding support (18). A longitudinal through slot (22) is formed in the side wall of the feeding support (18). The lifting driving element (21) is arranged on the side wall of the feeding support (18). The support (20) passes through the through slot (22) and is connected with the power end of the lifting driving element (21).

9. A machining center of a tower assembly according to claim 8, characterized in that The feeding mechanism further comprises a push rod assembly. The push rod assembly is used for pushing the main chord rod (100) to the conveying mechanism (1) after the main chord rod (100) reaches the feeding position. The push rod assembly comprises a push rod (23), a first rack (24), a first gear (25), a second gear (26), a third gear (27), a fourth gear (28), a fifth gear (29), a second rack (30), and an intermediate gear (38). The first rack (24) is slidingly arranged on the side wall of the feeding support (18). The push rod (23) is arranged on the first rack (24) and used for pushing the main chord rod (100) at the feeding position. The second rack (30) is connected with the support (20). The first rack (24) is in transmission connection with the second rack (30) through the first gear (25), the intermediate gear (38), the second gear (26), the third gear (27), the fourth gear (28), and the fifth gear (29).

10. A machining center of a tower assembly according to claim 9, characterized in that The first gear (25) is rotationally arranged on a gear shaft (31). The gear shaft (31) is slidingly arranged in a groove (32) formed in the outer wall of the feeding support (18). One end of the first spring (33) is connected with the side wall of the groove (32) close to the conveying mechanism (1). The other end of the first spring (33) is connected with the gear shaft (31). The other end of the second spring (34) is connected with the first rack (24) away from the conveying mechanism (1). The top surface of the feeding support (18) is provided with a clamping groove (35). A clamping block (36) is slidingly arranged in the clamping groove (35). The clamping block (36) is slidingly arranged in the clamping groove (35). The clamping groove (35) is provided with a third spring (37). The lower end of the third spring (37) is connected with the bottom surface of the clamping groove (35). The upper end of the third spring (37) is connected with the lower end surface of the clamping block (36).

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