Welding equipment and welding method for bicycle production

Abstract

The invention discloses welding equipment and a welding method for bicycle production, and relates to the technical field of bicycle welding, the welding equipment comprises a five-way joint, a vertical pipe, a lower pipe, an upper pipe and a head pipe, the head pipe is provided with a threading hole communicated with the upper pipe in a penetrating mode, and the welding equipment further comprises an operation table. An operator only needs to operate one component for placement treatment at a time, alignment placement treatment of two or more components does not need to be operated at the same time, the placement operation process is simplified, the butt joint placement efficiency is improved, the vertical pipe, the lower pipe and the upper pipe are sequentially placed and are matched with a locking mechanism for independent locking, and the labor intensity of workers is lowered. According to the technical scheme, when subsequent components are placed or the positions of the subsequent components are adjusted, the components which are placed and aligned before are not affected, and the butt joint precision and the welding precision of placing of all parts of the whole frame structure can be guaranteed in a sequential placing and locking mode.

Description

Technical Field

[0001] This invention relates to the field of bicycle welding technology, specifically to a welding equipment and welding method for bicycle production. Background Technology

[0002] Bicycle frames are mainly composed of top tube, head tube, down tube, bottom bracket, and stem tube. The top tube, head tube, down tube, bottom bracket, and stem tube are welded together to form the main body of the frame. In order to make the welding between the pipes more tight, the ends of each pipe are usually punched to form an interlocking arc, and cable routing holes are also made on the pipes to facilitate cable routing.

[0003] Currently, the welding of vehicle frames is usually done using a semi-automated welding method. The actual welding operation process is as follows: First, five pipes are placed on the welding fixture in sequence. After accurate alignment, they are fixed with clamps. Then, spot welding is performed on each connection. After the initial connection, the welded frame is corrected to ensure that the welding positions of each component are relatively accurate and to ensure the accuracy of subsequent structural welding. After the correction is completed, the spot-welded frame can be welded in all directions.

[0004] This process presents the following problems: When placing the five pipes, considering the need to align the arc ends and wiring holes of each pipe, the operator must simultaneously align two pipes with both hands before proceeding to align the others. During the welding alignment process, misalignment is inevitable, requiring adjustments to their position and angle. This leads to errors in placement accuracy, affecting welding precision. Adjusting one component may affect others, necessitating multiple repositioning adjustments, which is time-consuming and results in low assembly efficiency, further impacting welding efficiency. Therefore, this application proposes a welding equipment and method for bicycle production to solve the above problems. Summary of the Invention

[0005] This invention provides a welding equipment and welding method for bicycle production to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A welding equipment and welding method for bicycle production includes a bottom bracket, a riser, a down tube, an upper tube, and a head tube. The head tube has a through hole that communicates with the upper tube. The equipment also includes an operating table with a positioning pin for positioning the bottom bracket, a positioning component for positioning the head tube, and support platforms three, one, and two for positioning the riser, down tube, and upper tube, respectively.

[0007] The top of each of the three support platforms, the first support platform, and the second support platform is provided with a groove that is compatible with the riser, the lower pipe, and the upper pipe. Each of the three support platforms, the first support platform, and the second support platform is provided with an equipment cavity at the bottom of the groove. The groove is provided with a positioning groove that communicates with the equipment cavity. Each equipment cavity is provided with a locking mechanism to fix the position of the riser, the lower pipe, and the upper pipe.

[0008] A further improvement of the technical solution of the present invention is that: the locking mechanism includes the air bucket movably connected to the inner wall of the positioning groove, the top of the air bucket is fixedly connected to a soft sleeve, the soft sleeve is in contact with the outer surface of the riser, the lower pipe and the upper pipe, and the bottom of the air bucket is connected to a negative pressure fan through an air duct.

[0009] When the riser, lower pipe, and upper pipe are placed on the soft sleeve, the riser, lower pipe, and upper pipe shall not come into contact with the groove.

[0010] A further improvement of the technical solution of the present invention is that: two ear plates one and two ear plates two are fixedly connected to the bottom two sides of the air hopper, and a vertical guide rod is movably connected through the ear plate one and the ear plate two. The top of the vertical guide rod is fixedly connected to the top wall of the equipment cavity. A limiting plate is fixedly connected to the bottom of each vertical guide rod. A spring is sleeved on the outer surface of the vertical guide rod between the ear plate one and the limiting plate, and between the ear plate two and the limiting plate.

[0011] A further improvement of the technical solution of the present invention is that: an electromagnetic adsorption plate is fixedly connected between the two ear plates one and the two ear plates two, and a magnetic adsorption plate is fixedly connected to the inner wall of the equipment cavity by multiple uprights, with the electromagnetic adsorption plate and the magnetic adsorption plate being positioned correspondingly.

[0012] A further improvement of the technical solution of the present invention is that: both ends of the magnetic plate are fixedly connected to terminal blocks two, and a power storage device and an electronic control switch are connected in series between the two terminal blocks two by wires.

[0013] Each of the ear plates is fixedly connected to a terminal block 1. Both terminals 1 are electrically connected to the electromagnetic adsorption plate via wires 2. Both ends of the electromagnetic adsorption plate on the other side are electrically connected to wires 1, and the two wires 1 are electrically connected to the terminal blocks 1 on the same side respectively.

[0014] A further improvement of the technical solution of the present invention is that: the positioning component includes a head tube positioning seat movably connected to the operating table, a positioning column fixedly connected to one side of the head tube positioning seat, the outer diameter of the positioning column being adapted to the inner diameter of the head tube, a guide column movably connected through the positioning column, a pressure sensor embedded in the guide column, the installation position of the guide column being aligned with the upper tube, the diameter of the guide column being the same as the diameter of the wire hole and equal to the inner diameter of the upper tube, and a telescopic rod for driving the guide column to extend out of the positioning column being fixedly connected inside the positioning column.

[0015] A further improvement of the technical solution of the present invention is that: a mounting bracket is fixedly connected to the inner wall of the positioning column, a drive device is fixedly connected to the mounting bracket via a support leg, and a rotating disk is fixedly connected to the output shaft of the drive device, the outer diameter of the rotating disk being the same as the inner diameter of the head tube.

[0016] A further improvement of the technical solution of the present invention is that: a sliding base 1 is installed at the bottom of the support platform 1, and a sliding base 2 is installed at the bottom of the support platform 2, and the sliding base 1 and the sliding base 2 can slide along the sliding groove 1 opened on the operating platform.

[0017] The operating platform has a second slide groove perpendicular to the first slide groove, and the positioning component can slide along the second slide groove in multiple directions.

[0018] A further improvement of the technical solution of the present invention is that: the support platform is rotatably connected to the sliding base via a shaft, and a driven wheel is fixedly connected to the outer surface of the shaft inside the sliding base, and a driving wheel is meshed with the outer surface of the driven wheel.

[0019] A welding method for bicycle manufacturing includes the following steps: Step 1: First, insert the bottom bracket into the positioning pin. Then, place the riser on the support platform three and move the riser closer to the bottom bracket until the arc end of the riser is in contact with the surface of the bottom bracket. At this point, press the riser down to activate the locking mechanism inside the support platform three and lock the position of the riser.

[0020] Step 2: Place the arc end of the upper pipe against the surface of the riser pipe. Then move the upper pipe to align it with the second support platform. Next, rotate and press the upper pipe downwards with the arc connection point as the center point, so that the locking mechanism inside the second support platform works and locks the position of the upper pipe.

[0021] Step 3: Place the lower tube on the support platform and move it closer to the bottom bracket so that the arc end of the lower tube fits against the surface of the bottom bracket. Then press the lower tube down to activate the locking mechanism inside the support platform and lock the position of the lower tube.

[0022] Step 4: Insert the head tube into the positioning assembly and rotate the head tube so that the guide post extends through the wire hole of the positioning post. At this time, slide the positioning assembly closer to the upper tube until the guide post is inserted into the upper tube and the arc-shaped openings of the lower and upper tubes are in contact with the outer circumference of the head tube.

[0023] Due to the adoption of the above technical solution, the technical progress achieved by this invention compared to the prior art is as follows: 1. This invention provides a welding equipment and welding method for bicycle production. Operators only need to operate one component at a time for placement processing, without having to operate two or more components for alignment processing at the same time, simplifying the placement operation process and improving the docking and placement efficiency.

[0024] 2. This invention provides a welding equipment and welding method for bicycle production. The riser tube, down tube, and top tube are placed in sequence and locked individually with a locking mechanism. This ensures that the placement or adjustment of subsequent parts will not affect the previously placed and aligned parts. By placing and locking them in sequence, the alignment accuracy and welding accuracy of each part of the overall frame structure can be guaranteed.

[0025] 3. This invention provides a welding equipment and welding method for bicycle production. After the head tube is positioned by the positioning component, when the head tube is tightly abutted against the arc end of the lower tube and the upper tube, the position of the wire hole on the head tube is aligned with the cavity of the upper tube, thereby ensuring the accurate placement of the head tube and improving the welding precision at the connection between the lower tube, the upper tube and the head tube. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the vehicle frame after it has been placed. Figure 3 This is an exploded structural diagram of the main body of the vehicle frame of the present invention; Figure 4 This is a schematic diagram of the locking mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A; Figure 6 This is a structural schematic diagram of the locking mechanism of the present invention from another angle; Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the ear plate II of the present invention; Figure 9 This is a schematic diagram of the structure of the soft sleeve and the air duct of the present invention; Figure 10 This is a schematic diagram of the positioning component of the present invention; Figure 11 This is a schematic cross-sectional view of the guide post of the present invention during operation; Figure 12 This is a schematic diagram of the connection between the support platform and the sliding base of the present invention.

[0027] In the diagram: 1. Bottom joint; 2. Riser; 3. Lower pipe; 4. Upper pipe; 5. Head pipe; 6. Cable hole; 7. Operating table; 8. Positioning pin; 9. Support platform one; 10. Support platform two; 11. Support platform three; 12. Rotating pressing assembly; 13. Sliding base one; 14. Driven wheel; 15. Drive wheel; 16. Slide groove one; 17. Head pipe positioning seat; 18. Positioning column; 19. Guide column; 20. Pressure sensor; 21. Telescopic rod; 22. Mounting bracket; 23. Drive device one; 24. Rotary disc; 25. Positioning groove; 26. Soft sleeve; 27. Air duct; 28. 29. Air duct; 30. Negative pressure fan; 31. Ear plate 1; 32. Electromagnetic adsorption plate; 33. Wire 1; 34. Vertical guide rod; 35. Spring; 36. Ear plate 2; 37. Terminal block 1; 38. Wire 2; 39. Wire 3; 40. Upright pole; 41. Magnetic plate; 42. Terminal block 2; 43. Electrical control switch; 44. Energy storage device; 45. Slide groove 2; 46. Sliding box; 47. Guide rod 1; 48. Drive rod 1; 49. Connecting plate; 50. Drive rod 2; 51. Guide rod 2; 52. Drive rod 3; 53. Sliding base 2. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to embodiments:

[0029] Example 1:

[0030] like Figure 1-3 As shown, this invention provides a welding device for bicycle production, including a bottom bracket 1, a riser 2, a lower tube 3, an upper tube 4, and a head tube 5. The bottom bracket 1, riser 2, lower tube 3, upper tube 4, and head tube 5 are sequentially spliced ​​and welded to form the main frame body. The head tube 5 has a through hole 6 that communicates with the upper tube 4. When the upper tube 4 and the head tube 5 are welded, the through hole 6 is completely connected to the inner cavity of the upper tube 4, which facilitates subsequent cable routing. The device also includes an operating platform 7. The operating platform 7 is a prior art device that can be directly fixed to the ground and used in conjunction with a welding robot arm for welding, or it can be mounted on a drive structure to drive the entire operating platform 7 to rotate and use the welding robot arm for welding operations. The operating platform 7 is provided with a positioning pin 8 for positioning the bottom bracket 1, a positioning component for positioning the head tube 5, and support platforms 11, 9, and 10 for positioning the riser 2, lower tube 3, and upper tube 4, respectively. The outer diameter of the positioning pin 8 is adapted to the inner diameter of the bottom bracket 1.

[0031] The tops of support platform 3 11, support platform 1 9, and support platform 2 10 are all provided with grooves that are compatible with the riser 2, lower pipe 3, and upper pipe 4. Support platform 3 11, support platform 1 9, and support platform 2 10 are all provided with equipment cavities at the bottom of the grooves. Positioning grooves 25 that communicate with the equipment cavities are provided on the grooves. Each equipment cavity is provided with a locking mechanism to fix the position of the riser 2, lower pipe 3, and upper pipe 4.

[0032] When welding is required on the frame, first insert the bottom bracket 1 into the positioning pin 8. Then, place the riser 2, lower tube 3, and upper tube 4 into the grooves on the support platform 3 11, support platform 1 9, and support platform 2 10 in sequence. Use the locking mechanism to lock the position of each component. Next, position the head tube 5 using the positioning component. Then move the positioning component and the head tube 5 closer to the upper tube 4 until the arc ends of the lower tube 3 and upper tube 4 are in contact with the outer circumference of the head tube 5. At this point, the welding robot arm can be used to weld the joints. After welding, the positioning component separates from the head tube 5. Then, all locking mechanisms simultaneously release the locks on the riser 2, lower tube 3, and upper tube 4. The welded workpiece can then be removed for further processing. The above processing method has the following beneficial effects: First, operators only need to operate one component at a time for placement, eliminating the need to operate two or more components simultaneously for alignment, thus simplifying the placement process and improving docking efficiency. 2. The riser tube 2, the lower tube 3, and the upper tube 4 are placed in sequence and locked individually with the locking mechanism. This ensures that when subsequent parts are placed or their positions are adjusted, the previously placed and aligned parts will not be affected. By placing and locking them in sequence, the docking accuracy and welding accuracy of each part of the overall frame structure can be guaranteed. 3. After the riser 2 is locked in position by the locking mechanism, the arc end of the riser 2 abuts against the surface of the bottom tube 1, so that the bottom tube 1 is subject to the lateral limiting effect of the riser 2. This ensures that the bottom tube 1 will not be affected when the bottom tube 3 is subsequently connected and placed, thus ensuring the connection accuracy of the bottom tube 1 and the riser 2, the bottom tube 1 and the bottom tube 3, and the subsequent welding accuracy. Fourth, after the head tube 5 is positioned by the positioning component, when the head tube 5 is tightly abutted against the arc end of the lower tube 3 and the upper tube 4, the position of the wire hole 6 opened on the head tube 5 is aligned with the cavity of the upper tube 4, thereby ensuring the accurate placement of the head tube 5 and improving the welding accuracy at the connection between the lower tube 3, the upper tube 4 and the head tube 5.

[0033] Furthermore, such as Figure 4-9 As shown, the locking mechanism includes a hopper 27 movably connected to the inner wall of the positioning groove 25. A soft sleeve 26 is fixedly connected to the top of the hopper 27. The soft sleeve 26 is made of soft material and has a certain elasticity, so that the soft sleeve 26 will undergo a certain degree of elastic deformation under the gravity of the riser 2, lower pipe 3, and upper pipe 4, so that the soft sleeve 26 fits tightly with the surface of the riser 2, lower pipe 3, and upper pipe 4. The soft sleeve 26 fits with the outer surface of the riser 2, lower pipe 3, and upper pipe 4. The bottom of the hopper 27 is connected to a negative pressure fan 29 through a duct 28. The duct 28 is made of soft material. The negative pressure fan 29 is existing technology and includes a filter screen, a fan, and a motor that drives the fan to rotate.

[0034] When the riser 2, lower pipe 3, and upper pipe 4 are placed on the soft sleeve 26, they do not abut against the groove. When the riser 2, lower pipe 3, and upper pipe 4 are placed on the soft sleeve 26 on the support platform 11, support platform 9, and support platform 20 respectively, their outer surfaces are in contact with the soft sleeve 26, forming a sealed space. Then, the negative pressure is generated by the negative pressure fan 29. Under the action of atmospheric pressure, the riser 2, lower pipe 3, and upper pipe 4 on the soft sleeve 26 are attracted, locking the placement position of the riser 2, lower pipe 3, and upper pipe 4 in sequence, ensuring that subsequent placement operations or position adjustments will not affect the previously aligned components.

[0035] Furthermore, two ear plates 30 and two ear plates 35 are fixedly connected to the bottom sides of the air bucket 27, respectively. Vertical guide rods 33 are movably connected through ear plates 30 and 35. The top of the vertical guide rods 33 is fixedly connected to the top wall of the equipment cavity. A limit plate is fixedly connected to the bottom of each vertical guide rod 33. Springs 34 are sleeved on the outer surface of the vertical guide rods 33 between ear plates 30 and the limit plate, and between ear plates 35 and the limit plate. When the vertical pipe 2, lower pipe 3, or upper pipe 4 is subjected to gravity or when the vertical pipe 2, lower pipe 3, or upper pipe 4 is pressed down, the air bucket 27 and ear plates 30 and 35 slide down along the vertical guide rods 33, while the springs 34 are compressed to cause elastic deformation. After the vertical pipe 2, lower pipe 3, and upper pipe 4 are welded, the soft sleeve 26 and air bucket 27 are driven back to their original positions under the action of the compressed springs 34, ensuring that subsequent use is not affected.

[0036] Furthermore, electromagnetic adsorption plates 31 are fixedly connected between the two ear plates 30 and the two ear plates 35, and magnetic adsorption plates 41 are fixedly connected to the inner wall of the equipment cavity by multiple uprights 40. The positions of the electromagnetic adsorption plates 31 and the magnetic adsorption plates 41 are set accordingly.

[0037] When the riser 2, lower tube 3, or upper tube 4 is pressed down, the air hopper 27, ear plate 1 30, ear plate 2 35, and electromagnetic adsorption plate 31 will move down simultaneously. When the electromagnetic adsorption plate 31 is very close to the magnetic adsorption plate 41, the electromagnetic adsorption plate 31 will be adsorbed onto the magnetic adsorption plate 41 under the magnetic attraction. The directional force of the spring 34 restoring its deformation is less than the magnetic attraction between the electromagnetic adsorption plate 31 and the magnetic adsorption plate 41. At this time, the riser 2, lower tube 3, or upper tube 4 fits into the groove, and the upper surface of the soft sleeve 26 matches the groove. The groove of the soft sleeve 26 forms an auxiliary support. At the same time, the air hopper 27 is made of hard material, and the soft sleeve 26 is low in height to ensure that when the riser 2, lower tube 3, or upper tube 4 is pressed down, the soft sleeve 26 will not undergo violent elastic deformation, causing the riser 2, lower tube 3, or upper tube 4 to shift during the downward movement process, thus affecting the accuracy of its locking position.

[0038] Furthermore, both ends of the magnetic plate 41 are fixedly connected to terminal blocks 42, and the two terminal blocks 42 are connected in series with a power storage device 44 and an electric control switch 43 via wires.

[0039] Each ear plate 35 is fixedly connected to a terminal block 36. Both terminals 36 are electrically connected to the electromagnetic adsorption plate 31 via wires 37. The electromagnetic adsorption plate 31 is an existing technology and is an electromagnet structure. Both ends of the other side of the electromagnetic adsorption plate 31 are electrically connected to wires 32. The two wires 32 are electrically connected to the terminals 36 on the same side. The surface of the negative pressure fan 29 is electrically connected to wires 38 and 39. The other ends of wires 38 and 39 are electrically connected to the corresponding terminals 36. Through this scheme, the two electromagnetic adsorption plates 31 and the negative pressure fan 29 are connected in parallel, and each is connected to the two terminals 36 as two electrical connection terminals. After the two terminals 36 are connected to the circuit, the two electromagnetic adsorption plates 31 and the negative pressure fan 29 work synchronously.

[0040] When the riser 2, lower pipe 3, or upper pipe 4 is pressed down, the electromagnetic adsorption plate 31 moves down to abut against the magnetic adsorption plate 41. At this point, the terminal 36 fixedly connected to the ear plate 35 is electrically connected to the terminal 42, causing the two electromagnetic adsorption plates 31 and the negative pressure fan 29 to work synchronously. The electromagnetic adsorption plate 31 generates electromagnetic adsorption, adsorbing itself onto the magnetic adsorption plate 41, thus fitting the riser 2, lower pipe 3, or upper pipe 4 into the groove. Simultaneously, the negative pressure fan 29 operates, generating negative pressure attraction, locking the position of the riser 2, lower pipe 3, or upper pipe 4 within the groove, preventing displacement and ensuring precise subsequent placement. To ensure accuracy and welding precision, after welding is completed, the positioning component first separates from the head tube 5, and then the circuit is disconnected by the electronic control switch 43, so that the magnetic attraction between the electromagnetic adsorption plate 31 and the magnetic adsorption plate 41 disappears, and the negative pressure attraction also disappears. At this time, the welded frame body rebounds under the action of the compression spring 34, and pops the welded frame body out of the grooves of support platform 1 9, support platform 2 10, and support platform 3 11, making it easy to remove the welded frame. It also allows the soft sleeve 26, wind hopper 27, ear plate 1 30, and ear plate 2 35 to move up along the vertical guide rod 33 and return to their original positions, so that subsequent use is not affected.

[0041] Furthermore, such as Figure 10-11As shown, the positioning assembly includes a head tube positioning seat 17 movably connected to the operating table 7. A positioning post 18 is fixedly connected to one side of the head tube positioning seat 17. The diameter of the head tube positioning seat 17 is larger than the outer diameter of the head tube 5 and the positioning post 18, so that when the head tube 5 is inserted into the positioning post 18, one side of the head tube 5 abuts against the head tube positioning seat 17. The outer diameter of the positioning post 18 is adapted to the inner diameter of the head tube 5. A guide post 19 is movably connected through the positioning post 18. A pressure sensor 20 is embedded in the guide post 19. The installation position of the guide post 19 is aligned with the upper tube 4. The diameter of the guide post 19 is the same as the diameter of the wire hole 6 and equal to the inner diameter of the upper tube 4. A telescopic rod 21 that drives the guide post 19 to extend out of the positioning post 18 is fixedly connected inside the positioning post 18. The telescopic rod 21 is existing technology and includes one of electric drive or pneumatic drive.

[0042] Furthermore, a mounting bracket 22 is fixedly connected to the inner wall of the positioning column 18. A drive device 23 is fixedly connected to the mounting bracket 22 via a support leg. The drive device 23 is existing technology and includes a motor and related accessories. A rotating disk 24 is fixedly connected to the output shaft of the drive device 23. The outer diameter of the rotating disk 24 is the same as the inner diameter of the head tube 5.

[0043] The positioning pin 18 is inserted into the rotating disk 24 and the positioning pin 18 at any angle. Then, the rotating disk 24 is driven to rotate by the drive device 23. The friction between the surface of the rotating disk 24 and the inner wall of the head tube 5 causes the head tube 5 to rotate together. At this time, under the slight pushing action of the telescopic rod 21, the pressure sensor 20 abuts against the inner wall of the head tube 5 and generates a pressure signal. The rotation of the head tube 5 is not affected. When the head tube 5 rotates to the point where the guide pin 19 is aligned with the wire hole 6, the guide pin 19 does not abut against the inner wall of the head tube 5, and no pressure signal is generated at the pressure sensor 20. At this time, the telescopic rod 21... The guide post 19 is moved through the wire hole 6 to the outside of the head tube 5, and the extended position of the guide post 19 is aligned with the cavity of the upper tube 4. Then, the positioning component is moved closer to the upper tube 4. When the head tube 5 and the arc of the upper tube 4 come into contact, the guide post 19 is inserted into the interior of the upper tube 4, which further improves the docking accuracy of the connection between the upper tube 4 and the head tube 5 and ensures the subsequent welding accuracy. After the welding is completed, the telescopic rod 21 drives the guide post 19 to move until it is in contact with the outer circumference of the positioning post 18. Then, the positioning component moves away from the head tube 5 and separates from the head tube 5, which facilitates the removal of the component after the subsequent welding is completed.

[0044] Furthermore, such as Figure 1 , 2As shown in Figure 12, multiple rotating pressing assemblies 12 are installed on the operating table 7, which are used to press the riser 2, lower pipe 3, and upper pipe 4 respectively. A sliding base 13 is installed at the bottom of the support platform 19 and the rotating pressing assembly 12 used to press the lower pipe 3. A sliding base 23 is installed at the bottom of the support platform 20 and the rotating pressing assembly 12 used to press the upper pipe 4. The sliding base 13 and the sliding base 23 can slide along the slide groove 16 opened on the operating table 7. Two drive rods 32 are movably connected to the inner wall of the slide groove 16. One drive rod 352 is threadedly connected to the sliding base 13 and movably connected to the sliding base 23. The other drive rod 352 is threadedly connected to the sliding base 23 and movably connected to the sliding base 13. The operating table 7 is also equipped with a drive device 2 for driving the two drive rods 352 to rotate. The drive device 2 is existing technology and includes a motor and related accessories.

[0045] The rotating pressing component 12 mainly serves as an auxiliary fixation component, further fixing the positions of the riser 2, lower pipe 3, and upper pipe 4 to ensure that subsequent welding operations will not cause deviations between the components, thus affecting the welding accuracy.

[0046] The rotating pressing assembly 12 is existing technology, which includes a pressing block movably connected to the output end of a corner cylinder. The pressing block and the output end of the corner cylinder are connected by a screw or other connection method, so that the pressing block can move up or down along the output end of the corner cylinder to meet different fixing requirements.

[0047] The operating table 7 has a second slide groove 45 perpendicular to the first slide groove 16. The positioning component can slide along the second slide groove 45 in multiple directions. The bottom of the head tube positioning seat 17 is movably connected to a guide rod 47 and a drive rod 48. Both ends of the guide rod 47 and the drive rod 48 are connected to sliding boxes 46. The drive rod 48 is threadedly connected to the head tube positioning seat 17, and a drive device 3 is installed inside the sliding box 46. The drive device 3 is existing technology and includes a motor and related accessories. It is used to drive the drive rod 48 to rotate, causing the positioning component to move along the guide rod 47 and the drive rod 48 towards or away from the upper tube 4. At the same time, the sliding box 46 is externally fixedly connected to... Two connecting plates 49 are provided, each with a drive rod 50 and a guide rod 51 connected through it. The drive rod 50 and guide rod 51 are connected to the inner wall of the slide groove 45. The drive rod 50 is threaded to the connecting plate 49. The operating table 7 is provided with a drive device 4 for rotating the drive rod 50. The drive device 4 is existing technology and includes a motor and related accessories. It is used to drive the drive rod 50 to rotate, thereby moving the connecting plate 49, the slide box 46 and the positioning assembly along the direction of the drive rod 50 and the guide rod 51 to meet the positioning requirements of the head tube 5 in the technical solution of this application, as well as the positioning and placement requirements of frames of different sizes.

[0048] The second driving device drives the sliding base 13 and the third driving rod 52 to rotate, so that the sliding base 13 and the second sliding base 53 respectively drive the support platform 9 and the support platform 2 10 to move along the slide groove 16, adjusting the distance between the support platform 9 and the support platform 2 10. This, combined with the movement of the positioning component on the slide groove 2 45, adapts to different frame sizes, improves the applicability of the device, and also meets the positioning requirements of the head tube 5 in the technical solution of this application.

[0049] The positioning requirements for the head tube 5 are as follows: First, move the positioning component away from the upper tube 4 so that the distance between the positioning component and the riser 2 is greater than the length of the upper tube 4, which facilitates the placement and position adjustment of the upper tube 4 on the support platform 2 10. After the lower tube 3 and the upper tube 4 are locked in position on the support platform 1 9 and the support platform 2 10 respectively, place the head tube 5 on the positioning component for alignment and positioning, so that the guide post 19 extends out of the head tube 5 through the wire hole 6. Then, the positioning component moves closer to the upper tube 4 in the slide groove 2 45 until the guide post 19 penetrates into the cavity of the upper tube 4 and the arc end of the upper tube 4 is in close contact with the surface of the head tube 5. At this time, the positioning of the head tube 5 is completed. After welding is completed, the guide post 19 is retracted into the positioning post 18, and the positioning component moves away from the head tube 5 until it is completely separated from the head tube 5. At this time, the locking mechanism is unlocked, and the frame after welding can be removed.

[0050] Furthermore, the support platform 9 is rotatably connected to the sliding base 13 via a shaft. A driven wheel 14 is fixedly connected to the outer surface of the shaft inside the sliding base 13. A driving wheel 15 is meshed with the outer surface of the driven wheel 14. A drive device 5 is provided inside the sliding base 13 to drive the driving wheel 15 to rotate. The drive device 5 is existing technology and includes a motor, servo motor, and related accessories. The drive device 5 drives the driving wheel 15 to rotate, causing the driven wheel 14 and the support platform 9 to rotate together, so that the tilt angle of the lower tube 3 can be adjusted according to actual needs to adapt to more welding requirements.

[0051] A welding method for bicycle manufacturing includes the following steps: Step 1: First, insert the bottom bracket 1 into the positioning pin 8. Then, place the riser 2 on the support platform 3 11 and move the riser 2 closer to the bottom bracket 1 until the arc end of the riser 2 fits tightly against the surface of the bottom bracket 1. At this time, press the riser 2 down to make the locking mechanism inside the support platform 3 11 work and lock the position of the riser 2. Step 2: Place the arc end of the upper tube 4 against the surface of the vertical tube 2. Then move the position of the upper tube 4 so that it is aligned with the support platform 2 10. Then, rotate and press the upper tube 4 downward with the arc connection as the center point, so that the locking mechanism inside the support platform 2 10 works and locks the position of the upper tube 4. Step 3: Place the lower tube 3 on the support platform 9 and move the lower tube 3 closer to the bottom bracket 1 so that the arc end of the lower tube 3 is in contact with the surface of the bottom bracket 1. At this time, press the lower tube 3 down to make the locking mechanism inside the support platform 9 work and lock the position of the lower tube 3. Step 4: Insert the head tube 5 into the positioning assembly and rotate the head tube 5 so that the guide post 19 extends through the through-positioning post 18 and the wire hole 6. At this time, slide the positioning assembly closer to the upper tube 4 until the guide post 19 is inserted into the upper tube 4 and the arc-shaped openings of the lower tube 3 and the upper tube 4 are in contact with the outer circumferential surface of the head tube 5.

Claims

1. A welding device for bicycle manufacturing, comprising a bottom bracket (1), a riser (2), a bottom tube (3), an upper tube (4), and a head tube (5), wherein the head tube (5) has a through hole (6) communicating with the upper tube (4), characterized in that: It also includes an operating table (7), which is equipped with a positioning pin (8) for positioning the bottom bracket (1), a positioning component for positioning the head pipe (5), and support platform three (11), support platform one (9), and support platform two (10) for positioning the riser pipe (2), the lower pipe (3), and the upper pipe (4) respectively. The top of each of the support platform three (11), support platform one (9), and support platform two (10) is provided with a groove that is compatible with the riser (2), lower pipe (3), and upper pipe (4). Each of the support platform three (11), support platform one (9), and support platform two (10) is provided with an equipment cavity at the bottom of the groove. The groove is provided with a positioning groove (25) that communicates with the equipment cavity. Each of the equipment cavities is provided with a locking mechanism to fix the position of the riser (2), lower pipe (3), and upper pipe (4).

2. The welding equipment for bicycle production according to claim 1, characterized in that: The locking mechanism includes a wind bucket (27) movably connected to the inner wall of the positioning groove (25). A soft sleeve (26) is fixedly connected to the top of the wind bucket (27). The soft sleeve (26) is in contact with the outer surface of the riser (2), the lower pipe (3), and the upper pipe (4). A negative pressure fan (29) is connected to the bottom of the wind bucket (27) through a wind pipe (28). When the riser (2), lower pipe (3), and upper pipe (4) are placed on the soft sleeve (26), the riser (2), lower pipe (3), and upper pipe (4) do not abut against the groove.

3. The welding equipment for bicycle production according to claim 2, characterized in that: Two ear plates (30) and two ear plates (35) are fixedly connected to the bottom sides of the air hopper (27). A vertical guide rod (33) is movably connected through the ear plate (30) and the ear plate (35). The top of the vertical guide rod (33) is fixedly connected to the top wall of the equipment cavity. A limit plate is fixedly connected to the bottom of each vertical guide rod (33). A spring (34) is sleeved on the outer surface of the vertical guide rod (33) between the ear plate (30) and the limit plate, and between the ear plate (35) and the limit plate.

4. The welding equipment for bicycle production according to claim 3, characterized in that: Electromagnetic adsorption plates (31) are fixedly connected between the two ear plates (30) and the two ear plates (35). Magnetic plates (41) are fixedly connected to the inner wall of the equipment cavity by multiple uprights (40). The positions of the electromagnetic adsorption plates (31) and the magnetic plates (41) are set accordingly.

5. The welding equipment for bicycle production according to claim 4, characterized in that: Both ends of the magnetic plate (41) are fixedly connected to terminal blocks (42), and the two terminal blocks (42) are connected in series with a power storage device (44) and an electric control switch (43) via wires. Each of the ear plates (35) is fixedly connected to a terminal block (36). Both terminals (36) are electrically connected to the electromagnetic adsorption plate (31) via wires (37). Both ends of the electromagnetic adsorption plate (31) on the other side are electrically connected to wires (32). The two wires (32) are electrically connected to the terminals (36) on the same side respectively.

6. The welding equipment for bicycle production according to claim 1, characterized in that: The positioning assembly includes a head tube positioning seat (17) movably connected to the operating table (7). A positioning column (18) is fixedly connected to one side of the head tube positioning seat (17). The outer diameter of the positioning column (18) is adapted to the inner diameter of the head tube (5). A guide column (19) is movably connected through the positioning column (18). A pressure sensor (20) is embedded in the guide column (19). The installation position of the guide column (19) is aligned with the upper tube (4). The diameter of the guide column (19) is the same as the diameter of the wire hole (6) and equal to the inner diameter of the upper tube (4). A telescopic rod (21) is fixedly connected inside the positioning column (18) to drive the guide column (19) to extend out of the positioning column (18).

7. The welding equipment for bicycle production according to claim 6, characterized in that: A mounting bracket (22) is fixedly connected to the inner wall of the positioning column (18). A drive device (23) is fixedly connected to the mounting bracket (22) via a support leg. A rotating disk (24) is fixedly connected to the output shaft of the drive device (23). The outer diameter of the rotating disk (24) is the same as the inner diameter of the head tube (5).

8. The welding equipment for bicycle production according to claim 1, characterized in that: The bottom of the support platform 1 (9) is equipped with a sliding base 1 (13), and the bottom of the support platform 2 (10) is equipped with a sliding base 2 (53). The sliding base 1 (13) and the sliding base 2 (53) can slide along the sliding groove 1 (16) opened on the operating table (7). The operating table (7) is provided with a second slide (45) perpendicular to the first slide (16), and the positioning component can slide along the second slide (45) in multiple directions.

9. The welding equipment for bicycle production according to claim 8, characterized in that: The support platform (9) is rotatably connected to the sliding base (13) via a shaft. A driven wheel (14) is fixedly connected to the outer surface of the sliding base (13) inside the shaft. A driving wheel (15) is meshed on the outer surface of the driven wheel (14).

10. A welding method for bicycle production, applicable to the welding equipment for bicycle production as described in any one of claims 1-9, characterized in that: Includes the following steps: Step 1: First, insert the bottom bracket (1) into the positioning pin (8). Then, place the riser (2) on the support platform three (11) and move the riser (2) closer to the bottom bracket (1) until the arc end of the riser (2) is in contact with the surface of the bottom bracket (1). At this time, press the riser (2) down to make the locking mechanism inside the support platform three (11) work and lock the position of the riser (2). Step 2: Place the arc end of the upper tube (4) against the surface of the vertical tube (2), then move the position of the upper tube (4) so ​​that it is aligned with the support platform 2 (10), then rotate and press the upper tube (4) downward with the arc connection as the center point so that the locking mechanism inside the support platform 2 (10) works and locks the position of the upper tube (4). Step 3: Place the lower tube (3) on the support platform (9) and move the lower tube (3) closer to the bottom bracket (1) so that the arc end of the lower tube (3) fits against the surface of the bottom bracket (1). At this time, press the lower tube (3) down so that the locking mechanism inside the support platform (9) works and locks the position of the lower tube (3). Step 4: Insert the head tube (5) into the positioning assembly and rotate the head tube (5) so that the guide post (19) extends through the through-positioning post (18) and through the wire hole (6). At this time, slide the positioning assembly towards the side closer to the upper tube (4) until the guide post (19) is inserted into the upper tube (4) and the arc-shaped openings of the lower tube (3) and the upper tube (4) are in contact with the outer circumference of the head tube (5).

Images