Accessory bolt machining device for mechanical equipment

Abstract

The invention belongs to the technical field of mechanical equipment machining, and particularly relates to an accessory bolt machining device for mechanical equipment, which comprises a machining platform, and a machining screw tap is arranged above the machining platform; the rotary lifting mechanism is used for driving the machining screw tap to synchronously rotate in the lifting motion process, the rotary lifting mechanism comprises a lifting frame arranged above the machining screw tap, a limiting circular groove is formed in the inner top wall of the lifting frame, and two arc-shaped blocks are slidably connected into the limiting circular groove; the lower ends of the two arc-shaped blocks are jointly and fixedly connected with a bevel gear ring through a connecting rod, and the bevel gear ring is coaxially and movably connected with a machining screw tap. The multi-stage feeding mechanism is arranged, the hydraulic driving principle is adopted, after each section of tapping work is completed, the machining screw tap can move downwards by a certain distance, tapping is further carried out, deep hole tapping is decomposed into multiple times of small-depth cutting, and the single-time cutting force is remarkably reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical equipment processing, and particularly relates to a processing device for accessory bolts of mechanical equipment. Background Art

[0002] In the field of mechanical equipment processing, especially in the equipment manufacturing of the petrochemical industry, bolts, as key connecting components, their processing quality directly affects the sealing performance, safety and reliability of the equipment. Petrochemical equipment often involves harsh working conditions such as high pressure, high temperature and strong corrosion, which puts higher requirements on the thread accuracy, surface quality and mechanical properties of bolts.

[0003] Tapping, as a key process for bolt thread formation, forms precise threads on the inner hole or outer surface of the bolt blank through the cutting action of the processing tap, which is the basis for ensuring the connection strength and reliability of the bolt. However, traditional processing devices for accessory bolts often have the following technical problems in the use process:

[0004] During the tapping process, a one-time tapping method is often used. In this process, the tap needs to bear a large cutting force. Especially when the tapping depth is large, the tool stability is prone to decline, resulting in frequent problems such as thread deviation and broken wires, seriously affecting the connection strength of the bolt and the safe operation of the equipment;

[0005] If the debris generated during the processing is not cleaned up in time, it is easy to remain in the threaded hole, which not only affects the subsequent processing accuracy, but also may cause hidden dangers such as wear and blockage during the operation of the equipment, further threatening the stable operation of the petrochemical system. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems raised in the above background art, and provide a processing device for accessory bolts of mechanical equipment that can decompose deep hole tapping into multiple small-depth cuttings, significantly reducing the single cutting force.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A processing device for accessory bolts of mechanical equipment, comprising:

[0009] A processing platform, and a processing tap is arranged above the processing platform;

[0010] A rotary lifting mechanism is used to drive the processing tap to rotate synchronously during the lifting movement. The rotary lifting mechanism includes a lifting frame arranged above the processing tap. A limiting circular groove is opened on the inner top wall of the lifting frame. Two arc-shaped blocks are slidably connected in the limiting circular groove. The lower ends of the two arc-shaped blocks are fixedly connected together through a connecting rod with a bevel gear ring. The bevel gear ring is coaxially and movably connected with the processing tap. A lifting driving component for driving the whole lifting frame to make a lifting movement is arranged on the processing platform. A rotary driving component for driving the bevel gear ring to make a rotary movement relative to the lifting frame is arranged on one outer wall of the lifting frame;

[0011] A multi-stage feeding mechanism is used to increase the distance of the processing tap in the vertical direction relative to the lifting frame after each tapping.

[0012] Preferably, the lifting driving component includes a motor fixedly connected to the upper end of the processing platform. A threaded rod is fixedly connected to the output end of the motor. A threaded block that is in threaded cooperation with the threaded rod is fixedly connected to the outer wall of the lifting frame. A limiting block is fixedly connected to the outer wall of the lifting frame away from the threaded block. A limiting rod is fixedly connected to the upper end of the processing platform. The limiting rod passes through and is slidably connected to the limiting block.

[0013] Preferably, the rotary driving component includes a transmission shaft rotatably connected to the outer wall of the lifting frame. A bevel gear and a first gear are fixedly connected to the transmission shaft. The bevel gear meshes with the bevel gear ring. The upper end of the processing platform is fixedly connected with a first rack through a first support rod. The first gear meshes with the first rack.

[0014] Preferably, the multi-stage feeding mechanism includes a spline bushing fixedly connected to the central position of the bevel gear ring. A lifting rod is slidably connected in the spline bushing along the vertical direction. A spline shaft that cooperates with the spline bushing is arranged on the peripheral side wall of the lifting rod. The bottom end of the lifting rod is fixedly connected coaxially with the processing tap. The bottom end of the lifting frame is fixedly connected with an annular control box. An annular piston is hermetically slidably connected in the annular control box. Two extension rods are fixedly connected to the upper end of the annular piston. The two extension rods extend to a position above the annular control box and are fixedly connected together with a transmission plate. The lifting rod passes through the top wall of the lifting frame and is rotatably connected to the lower end of the transmission plate. A liquid guide box and a liquid storage box are fixedly connected to the upper end of the processing platform. A liquid discharge pipe is communicated between the liquid guide box and the liquid storage box. A liquid inlet pipe is communicated between the liquid guide box and the annular control box. A piston block is hermetically slidably connected in the liquid guide box. An L-shaped rod is fixedly connected between the piston block and the limiting block.

[0015] Preferably, a liquid storage space is formed among the annular control box, the liquid inlet pipe, the liquid guide box, the liquid discharge pipe and the liquid storage box. The liquid storage space is filled with hydraulic oil.

[0016] Preferably, one-way valves are provided in both the liquid inlet pipe and the liquid discharge pipe.

[0017] Preferably, a return pipe is connected between the liquid storage tank and the annular control box, and a pump is installed on the return pipe. The pump is used to drive the hydraulic oil to flow back from the liquid storage tank into the annular control box.

[0018] Preferably, a flipping mechanism is further provided at the upper end of the processing platform for flipping the workpiece to clean debris after tapping in each stage. The flipping mechanism includes two moving side plates slidably connected above the processing platform in the vertical direction. A rotating disc is rotatably connected to each moving side plate. A placing plate is fixedly connected between the two rotating discs. Electric push rods are fixedly connected to the side walls of the two rotating discs close to each other. The output end of the electric push rod is fixedly connected with an arc-shaped clamping plate. A resisting rod is fixedly connected to the side walls of the two moving side plates away from each other. Hook-shaped pull rods are fixedly connected to the side of the lifting frame close to the resisting rod. After the hook-shaped pull rods are lifted to a specified position, they abut against and pull the resisting rod to move upward. A rotating rod is fixedly connected to the side wall of the two rotating discs away from each other. The rotating rod is coaxially and fixedly connected to the corresponding rotating disc. A second gear is fixedly connected to the rotating rod. A second rack is fixedly connected to the upper end of the processing platform through a second support rod. The second gear meshes with the second rack.

[0019] Preferably, a T-shaped block is fixedly connected to the side wall of each moving side plate, and a guiding rod is fixedly connected to the upper end of the processing platform. The guiding rod penetrates through and is slidably connected to the T-shaped block.

[0020] Compared with the existing technology, the advantages of the bolt processing device for mechanical equipment accessories of the present invention are as follows:

[0021] 1. By setting the rotary lifting mechanism, while driving the lifting frame to lift by the motor, the synchronous rotation of the processing tap is realized through the gear-rack transmission. No additional driving source is required, which saves the processing cost, reduces the energy consumption, and simplifies the equipment structure at the same time. It is particularly suitable for scenarios with high requirements for energy efficiency and space layout in petrochemical equipment processing.

[0022] 2. By setting the multi-stage feeding mechanism and adopting the hydraulic driving principle, after each tapping operation is completed, the processing tap can be displaced downward by a certain distance to further perform tapping. The deep-hole tapping is decomposed into multiple small-depth cuttings (the feed per cut is equal to the pitch). Compared with the traditional one-time tapping, this method can significantly reduce the single-cutting force, reduce the tap wear and thread deformation. It is especially suitable for the high-precision processing of high-strength and deep-hole bolts in petrochemical equipment, effectively avoiding thread deviation and broken wire problems, and improving the connection reliability of bolts in high-pressure and corrosive environments.

[0023] 3. By setting up a flipping mechanism, after tapping in each stage, the moving side plate can be lifted upward, and at the same time, the accessory bolt clamped in the middle can be driven to rotate to discharge the debris inside it. After tapping is completed, it automatically flips to clean the debris, thoroughly removing the residual chips in the bolt thread holes of petrochemical equipment, avoiding the influence of debris on the subsequent processing accuracy, reducing manual intervention at the same time, and reducing the operation risk, meeting the strict requirements of the petrochemical industry for automation and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0025] Figure 2 is a schematic cross-sectional structure diagram at the lifting frame of the present invention;

[0026] Figure 3 is Figure 2 an enlarged view of part A in

[0027] Figure 4 is a schematic cross-sectional structure diagram at the annular control box of the present invention;

[0028] Figure 5 is a schematic partial structure diagram at the flipping mechanism of the present invention.

[0029] In the figure:

[0030] 1. Processing platform; 11. Processing tap;

[0031] 2. Rotary lifting mechanism; 21. Lifting frame; 22. Limiting circular groove; 23. Arc-shaped block; 24. Bevel gear ring; 25. Lifting drive component; 251. Motor; 252. Threaded rod; 253. Threaded block; 254. Limiting block; 255. Limiting rod; 26. Rotary drive component; 261. Transmission shaft; 262. Bevel gear; 263. First gear; 264. First rack;

[0032] 3. Multi-stage feeding mechanism; 31. Spline bushing; 32. Lifting rod; 33. Annular control box; 34. Annular piston; 35. Extension rod; 36. Transmission plate; 37. Liquid guide box; 38. Liquid storage tank; 39. Liquid inlet pipe; 310. Piston block; 311. L-shaped rod;

[0033] 4. Return pipe;

[0034] 5. Flipping mechanism; 51. Moving side plate; 52. Rotating disk; 53. Placing plate; 54. Electric push rod; 55. Arc-shaped clamping plate; 56. Supporting rod; 57. Hook-shaped pull rod; 58. Rotating rod; 59. Second gear; 510. Second rack;

[0035] 6. T-shaped block; 61. Guide rod. DETAILED DESCRIPTION OF THE INVENTION

[0036] The following embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0037] Embodiment: Referring to Figures 1 to 5 , a processing device for fitting bolts of a mechanical device, comprising:

[0038] A processing platform 1, and a processing tap 11 is provided above the processing platform 1;

[0039] A rotary lifting mechanism 2, which is used to drive the processing tap 11 to rotate synchronously during the lifting movement. The rotary lifting mechanism 2 includes a lifting frame 21 provided above the processing tap 11. A limiting circular groove 22 is opened on the inner top wall of the lifting frame 21. Two arc-shaped blocks 23 are slidably connected in the limiting circular groove 22. The lower ends of the two arc-shaped blocks 23 are fixedly connected together through a connecting rod with a bevel gear ring 24. The bevel gear ring 24 is coaxially movably connected with the processing tap 11. A lifting driving member 25 for driving the whole lifting frame 21 to make a lifting movement is provided on the processing platform 1. A rotary driving member 26 for driving the bevel gear ring 24 to rotate relative to the lifting frame 21 is provided on one outer wall of the lifting frame 21;

[0040] Specifically, the lifting driving member 25 includes a motor 251 fixedly connected to the upper end of the processing platform 1. A threaded rod 252 is fixedly connected to the output end of the motor 251. A threaded block 253 that is in threaded cooperation with the threaded rod 252 is fixedly connected to the outer wall of the lifting frame 21. A limiting block 254 is fixedly connected to one outer wall of the lifting frame 21 away from the threaded block 253. A limiting rod 255 is fixedly connected to the upper end of the processing platform 1. The limiting rod 255 passes through and is slidably connected to the limiting block 254.

[0041] During actual use, the motor 251 is started, and through the threaded cooperation between the threaded rod 252 and the threaded block 253, the lifting frame 21 is driven to make a vertical lifting movement along the limiting rod 255 to ensure the stability of the lifting process.

[0042] Specifically, the rotary driving member 26 includes a transmission shaft 261 rotatably connected to the outer wall of the lifting frame 21. A bevel gear 262 and a first gear 263 are fixedly connected to the transmission shaft 261. The bevel gear 262 meshes with the bevel gear ring 24. The upper end of the processing platform 1 is fixedly connected with a first rack 264 through a first support rod. The first gear 263 meshes with the first rack 264.

[0043] When the lifting frame 21 moves up and down, the first gear 263 meshes with the fixed first rack 264, driving the transmission shaft 261 to rotate, and then driving the bevel gear ring 24 to rotate through the bevel gear 262, realizing the synchronous rotation of the processing tap 11 during the lifting process, without an additional driving source, reducing energy consumption.

[0044] In view of the problem in the prior art that two different drive sources are required to drive the tap to move vertically and rotate, wasting the drive sources, the present invention sets up a rotary lifting mechanism 2. After starting the motor 251, the threaded rod 252 drives the threaded block 253 to move the lifting frame 21 vertically along the limiting rod 255. During this process, the first gear 263 on the outer wall of the lifting frame 21 meshes with the fixed first rack 264 to drive the transmission shaft 261 to rotate, and then drives the bevel gear ring 24 to rotate through the bevel gear 262. Since the bevel gear ring 24 is connected to the lifting rod 32 through the spline shaft sleeve 31 (the bottom end of the lifting rod 32 is fixedly processed with the tap 11), finally, it is realized that the processing tap 11 rotates synchronously during the lifting process. The lifting and rotation of the processing tap are synchronously driven through the rotary lifting mechanism, without an additional power source, saving the processing cost and improving the work efficiency at the same time.

[0045] The multi-stage feeding mechanism 3 is used to increase the distance of the processing tap 11 in the vertical direction relative to the lifting frame 21 after each tapping. The multi-stage feeding mechanism 3 includes a spline shaft sleeve 31 fixedly connected to the central position of the bevel gear ring 24. A lifting rod 32 is slidably connected to the spline shaft sleeve 31 in the vertical direction. A spline shaft for cooperating with the spline shaft sleeve 31 is provided on the peripheral side wall of the lifting rod 32. The bottom end of the lifting rod 32 is fixedly connected to the processing tap 11 coaxially. The bottom end of the lifting frame 21 is fixedly connected with an annular control box 33. An annular piston 34 is slidably sealed in the annular control box 33. The upper end of the annular piston 34 is fixedly connected with two extension rods 35. The two extension rods 35 extend to a position above the annular control box 33 and are fixedly connected with a transmission plate 36 together. The lifting rod 32 passes through the top wall of the lifting frame 21 and is rotatably connected to the lower end of the transmission plate 36. A liquid guide box 37 and a liquid storage box 38 are fixedly connected to the upper end of the processing platform 1. A drain pipe is communicated between the liquid guide box 37 and the liquid storage box 38. An inlet pipe 39 is communicated between the liquid guide box 37 and the annular control box 33. A piston block 310 is slidably sealed in the liquid guide box 37. An L-shaped rod 311 is fixedly connected between the piston block 310 and the limiting block 254.

[0046] Specifically, a liquid storage space is formed among the annular control box 33, the inlet pipe 39, the liquid guide box 37, the drain pipe and the liquid storage box 38, and the liquid storage space is filled with hydraulic oil.

[0047] During each lifting movement of the lifting frame 21, the limiting block 254 drives the piston block 310 to move in the liquid guide box 37 through the L-shaped rod 311, and the annular piston 34 and the transmission plate 36 are pushed by the hydraulic oil, so that the lifting rod 32 moves downward relative to the lifting frame 21 step by step, so that the processing tap 11 moves downward a certain distance after each tapping is completed, realizing the multi-stage feeding of the processing tap 11, so that the processing depth of the processing tap 11 for the fitting bolt is gradually increased, and the tapping process is divided into multiple stages.

[0048] Specifically, after each downward movement of the processing tap 11, the moving distance is the distance the processing tap 11 moves downward during one rotation during the tapping operation, so that the processing tap 11 always follows the pattern of the last tapping each time during tapping, thereby ensuring the effect of the tapping process.

[0049] Specifically, one-way valves are provided in the liquid inlet pipe 39 and the liquid discharge pipe, and the one-way valves ensure the one-way flow of the hydraulic oil, avoid backflow, and ensure the accuracy of multi-stage feeding.

[0050] Specifically, a reflux pipe 4 is connected between the liquid storage tank 38 and the annular control box 33, and a pump is installed on the reflux pipe 4. The pump is used to drive the hydraulic oil to flow back from the liquid storage tank 38 to the annular control box 33. After the tapping is completed, the pump returns the hydraulic oil to reset the lifting rod 32 to prepare for the next stage of tapping.

[0051] In view of the problem that one-time deep hole tapping in the prior art is prone to thread deviation or wire breakage due to concentrated cutting amount, the present invention sets a multi-stage feeding mechanism 3. When the lifting frame 21 moves upward, the limit block 254 drives the piston block 310 in the liquid guide box 37 to move upward through the L-shaped rod 311. Due to the action of the one-way valve in the liquid inlet pipe 39 and the liquid discharge pipe, the hydraulic oil can only flow from the annular control box 33 to the liquid guide box 37, pushing the annular piston 34 and the transmission plate 36 downward, thereby driving the lifting rod 32 (connected to the processing tap 11) to gradually move downward relative to the lifting frame 21. After each tapping is completed, the processing tap 11 moves downward by a distance equal to the feed amount (i.e., pitch) of one rotation, decomposing the deep hole tapping into multiple small cutting amount operations, reducing the single cutting force, and reducing tool wear and thread defects.

[0052] When the lifting frame 21 moves downward, the piston block 310 moves downward to discharge the hydraulic oil in the liquid guide box 37 into the liquid storage box 38 to ensure the feeding work of the lifting rod 32 next time.

[0053] After the tapping is completed, the pump pumps the hydraulic oil from the liquid storage tank 38 back to the annular control box 33 through the return pipe 4, so that the lifting rod 32 is reset to prepare for the next stage of tapping.

[0054] There is also a flipping mechanism 5 provided at the upper end of the processing platform 1, which is used to flip the workpiece after tapping in each stage to clean up debris. The flipping mechanism 5 includes two moving side plates 51 slidably connected in the vertical direction above the processing platform 1. A rotating disk 52 is rotatably connected to each moving side plate 51. A placing plate 53 is fixedly connected between the two rotating disks 52. Electric push rods 54 are fixedly connected to the side walls of the two rotating disks 52 close to each other. The output end of the electric push rod 54 is fixedly connected with an arc-shaped clamping plate 55. A resisting rod 56 is fixedly connected to the side wall of the two moving side plates 51 away from each other. Hook-shaped pull rods 57 are fixedly connected to the side of the lifting frame 21 close to the resisting rod 56. After the hook-shaped pull rod 57 moves up to a specified position, it touches and pulls the resisting rod 56 to move upward. A rotating rod 58 is fixedly connected to the side wall of the two rotating disks 52 away from each other. The rotating rod 58 is coaxially and fixedly connected to the corresponding rotating disk 52. A second gear 59 is fixedly connected to the rotating rod 58. The upper end of the processing platform 1 is fixedly connected with a second rack 510 through a second support rod. The second gear 59 meshes with the second rack 510.

[0055] Specifically, a T-shaped block 6 is fixedly connected to the side wall of each moving side plate 51. A guiding rod 61 is fixedly connected to the upper end of the processing platform 1. The guiding rod 61 passes through and is slidably connected to the T-shaped block 6.

[0056] When the lifting frame 21 moves up, the hook-shaped pull rod 57 pulls the resisting rod 56 to make the moving side plate 51 rise. At the same time, the second gear 59 meshes with the fixed second rack 510, driving the rotating disk 52 and the placing plate 53 to flip, cleaning up debris during the flipping process to avoid affecting the subsequent tapping accuracy.

[0057] Aiming at the problem in the prior art that debris generated during the tapping process is likely to remain in the threaded hole, affecting the subsequent processing accuracy, in the present invention, when the lifting frame 21 moves up to a certain height, the continuous upward movement of the lifting frame 21 will, through the hook-shaped pull rod 57, touch the resisting rod 56, driving the moving side plate 51 to rise along the guiding rod 61. At this time, the second gear 59 outside the rotating disk 52 meshes with the fixed second rack 510, causing the rotating disk 52 to drive the placing plate 53 to flip (the flipping angle is usually 180°), so that the debris falls off due to gravity during the flipping process without manual intervention. The flipping is triggered synchronously with the movement of the lifting frame 21, efficiently cleaning up the debris and avoiding the debris blockage from affecting the tapping quality in the next stage.

[0058] The functional principle of the present invention can be elaborated through the following operation modes:

[0059] I. Driving principle of the rotating and lifting mechanism 2 (synchronous control of the lifting and rotation of the processing tap 11)

[0060] 1. Lifting drive

[0061] After starting the motor 251, the output shaft of the motor 251 drives the threaded rod 252 to rotate. The threaded rod 252 forms a threaded drive with the threaded block 253 on the outer wall of the lifting frame 21, driving the lifting frame 21 to perform a vertical lifting motion along the limiting rod 255, so that the processing tap 11 moves vertically.

[0062] 2. Rotary drive

[0063] When the lifting frame 21 moves, the first gear 263 on the transmission shaft 261 on its outer wall meshes with the first rack 264 fixed on the processing platform 1, forcing the transmission shaft 261 to rotate. The bevel gear 262 at the other end of the transmission shaft rotates accordingly, and drives the meshing bevel gear ring 24 to rotate, so that the processing tap 11 rotates.

[0064] II. Depth control principle of the multi-stage feeding mechanism 3 (increasing the tapping depth in stages)

[0065] 1. Feeding logic of hydraulic drive

[0066] When the lifting frame 21 descends, the limiting block 254 pulls the piston block 310 in the liquid guide box 37 to move downward through the L-shaped rod 311, a negative pressure is formed in the liquid guide box, and the hydraulic oil flows from the liquid guide box 37 into the liquid storage box 38 through the liquid inlet pipe 39 (the one-way valve restricts the flow direction). At this time, the annular piston 34 is stationary, and the processing tap 11 descends synchronously with the lifting frame for the first tapping.

[0067] When the lifting frame 21 rises and resets, the limiting block 254 pushes the L-shaped rod 311 to move the piston block 310 downward. The hydraulic oil in the annular control box 33 enters the liquid guide box 37 through the liquid inlet pipe 39. The annular piston 34 and the transmission plate 36 move downward. The transmission plate 36 drives the processing tap 11 to move downward relative to the lifting frame 21 by an additional distance (the distance is equal to the feed amount of one revolution of the processing tap 11, that is, the pitch) through the rotatably connected lifting rod 32.

[0068] Through each reciprocating motion of the lifting frame 21, the volume change of the hydraulic oil is used to drive the processing tap 11 to move downward step by step, decomposing the deep-hole tapping into multiple small-depth cuttings (such as completing a 5-mm deep-hole tapping in 5 times). Each cutting amount is small and uniform, reducing the tool load and thread deviation.

[0069] 2. Reset and cycle

[0070] After the tapping is completed, the pump machine pumps the hydraulic oil in the liquid storage box 38 back to the annular control box 33 through the return pipe 4, so that the annular piston 34 resets, and the lifting rod 32 drives the processing tap back to the initial position to prepare for the next stage of tapping.

[0071] III. Chip clearing principle of the flipping mechanism 5 (automatically flipping the workpiece to discharge chips after tapping)

[0072] 1. Mechanically linked trigger flipping

[0073] When the lifting frame 21 rises to the specified position, the hook-shaped pull rod 57 on its outer wall abuts against the abutting rod 56 on the moving side plate 51, pulling the moving side plate to rise along the guide rod 61. At this time, the second gear 59 outside the rotating disk 52 meshes with the fixed second rack 510, forcing the rotating disk to drive the placing plate 53 to flip (usually 180°).

[0074] Motion transfer path: The lifting frame rises → The hook-shaped pull rod pulls the abutting rod → The moving side plate rises → The second gear meshes with the second rack → The rotating disk flips.

[0075] 2. Workpiece clamping and chip clearing

[0076] Before flipping, the electric push rod 54 drives the arc-shaped clamping plate 55 to clamp the workpiece to ensure the stability of the workpiece during flipping. When flipping, the chips in the threaded holes fall off due to gravity and fall into the collection tank (not marked in the figure) below the processing platform 1.

[0077] IV. Summary of the overall working process

[0078] Initial state: The machining tap 11 is located above the workpiece, the moving side plate 51 is in the lowest position, the workpiece is placed on the placing plate 53, and the arc-shaped clamping plate 55 clamps the fitting bolt.

[0079] The first stage of tapping:[[]]

[0080] The motor 251 drives the lifting frame 21 to descend, and the machining tap 11 rotates synchronously and performs the first tapping (depth is 1 pitch).

[0081] After the tapping is completed, the lifting frame 21 rises, and the multi-stage feeding mechanism 3 pushes the machining tap 11 to move downward by an additional 1 pitch.

[0082] Flipping and chip clearing:[[]]

[0083] After the lifting frame 21 rises to a certain height, the hook-shaped pull rod 57 pulls the moving side plate 51 to rise, driving the workpiece to flip and clear chips.

[0084] Circular machining:[[]]

[0085] After the chip clearing is completed, the moving side plate 51 resets, the lifting frame 21 descends again, and the next stage of tapping is performed (the depth accumulates), repeating until the set depth is reached.

[0086] Machining completion: The pump drives the hydraulic oil to flow back, the machining tap 11 resets, and the workpiece is taken out.

[0087] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A processing device for fitting bolts of a mechanical equipment, characterized in that, Comprising: A processing platform (1), above which a processing tap (11) is provided; A rotary lifting mechanism (2) for driving the processing tap (11) to rotate synchronously during the lifting movement. The rotary lifting mechanism (2) includes a lifting frame (21) provided above the processing tap (11). A limiting circular groove (22) is formed on the inner top wall of the lifting frame (21). Two arc-shaped blocks (23) are slidably connected in the limiting circular groove (22). The lower ends of the two arc-shaped blocks (23) are fixedly connected together by a connecting rod to a bevel gear ring (24). The bevel gear ring (24) is coaxially and movably connected to the processing tap (11). A lifting driving component (25) for driving the whole lifting frame (21) to move up and down is provided on the processing platform (1). A rotary driving component (26) for driving the bevel gear ring (24) to rotate relative to the lifting frame (21) is provided on one outer wall of the lifting frame (21); A multi-stage feeding mechanism (3) for increasing the distance of the processing tap (11) in the vertical direction relative to the lifting frame (21) after each tapping.

2. The processing device for the accessory bolt of the mechanical equipment according to claim 1, wherein, The lifting driving component (25) includes a motor (251) fixedly connected to the upper end of the processing platform (1). A threaded rod (252) is fixedly connected to the output end of the motor (251). A threaded block (253) that is in threaded cooperation with the threaded rod (252) is fixedly connected to the outer wall of the lifting frame (21). A limiting block (254) is fixedly connected to the outer wall of the lifting frame (21) away from the threaded block (253). A limiting rod (255) is fixedly connected to the upper end of the processing platform (1). The limiting rod (255) passes through and is slidably connected to the limiting block (254).

3. The accessory bolt processing device for mechanical equipment according to claim 1, characterized in that, The rotary driving component (26) includes a transmission shaft (261) rotatably connected to the outer wall of the lifting frame (21). A bevel gear (262) and a first gear (263) are fixedly connected to the transmission shaft (261). The bevel gear (262) meshes with the bevel gear ring (24). A first rack (264) is fixedly connected to the upper end of the processing platform (1) through a first support rod. The first gear (263) meshes with the first rack (264).

4. The accessory bolt processing device for mechanical equipment according to claim 2, wherein, The multi-stage feeding mechanism (3) includes a spline shaft sleeve (31) fixedly connected to the central position of the bevel gear ring (24). A lifting rod (32) is slidably connected vertically inside the spline shaft sleeve (31). A spline shaft for cooperating with the spline shaft sleeve (31) is provided on the peripheral side wall of the lifting rod (32). The bottom end of the lifting rod (32) is fixedly connected coaxially with the machining tap (11). The bottom end of the lifting frame (21) is fixedly connected with an annular control box (33). An annular piston (34) is slidably sealed inside the annular control box (33). The upper end of the annular piston (34) is fixedly connected with two extension rods (35). The two extension rods (35) extend to a position above the annular control box (33) and are jointly fixedly connected with a transmission plate (36). The lifting rod (32) passes through the top wall of the lifting frame (21) and is rotatably connected to the lower end of the transmission plate (36). A liquid guide box (37) and a liquid storage box (38) are fixedly connected to the upper end of the machining platform (1). A drain pipe is communicated between the liquid guide box (37) and the liquid storage box (38). A liquid inlet pipe (39) is communicated between the liquid guide box (37) and the annular control box (33). A piston block (310) is slidably sealed inside the liquid guide box (37). An L-shaped rod (311) is fixedly connected between the piston block (310) and the limiting block (254).

5. The processing device for the accessory bolt of the mechanical equipment according to claim 4, characterized in that, A liquid storage space is formed among the annular control box (33), the liquid inlet pipe (39), the liquid guide box (37), the drain pipe and the liquid storage box (38). The liquid storage space is filled with hydraulic oil.

6. The processing device for the accessory bolt of the mechanical equipment according to claim 4, wherein, One-way valves are provided in both the liquid inlet pipe (39) and the drain pipe.

7. The processing device for the accessory bolt of the mechanical equipment according to claim 4, characterized in that, A return pipe (4) is communicated between the liquid storage box (38) and the annular control box (33). A pump is installed on the return pipe (4). The pump is used to drive the hydraulic oil to flow back from the liquid storage box (38) into the annular control box (33).

8. The processing device for the accessory bolt of the mechanical equipment according to claim 1, wherein, The upper end of the processing platform (1) is further provided with a flipping mechanism (5) for flipping the workpiece to clean debris after tapping in each stage. The flipping mechanism (5) includes two moving side plates (51) slidably connected above the processing platform (1) in the vertical direction. A rotating disk (52) is rotatably connected to each moving side plate (51). A placing plate (53) is fixedly connected between the two rotating disks (52). An electric push rod (54) is fixedly connected to the side walls of the two rotating disks (52) close to each other. The output end of the electric push rod (54) is fixedly connected with an arc-shaped clamping plate (55). A resisting rod (56) is fixedly connected to the side walls of the two moving side plates (51) away from each other. Hook-shaped pull rods (57) are fixedly connected to the side of the lifting frame (21) close to the resisting rod (56). After the hook-shaped pull rods (57) move up to the designated position, they contact and pull the resisting rod (56) to move upward. A rotating rod (58) is fixedly connected to the side walls of the two rotating disks (52) away from each other. The rotating rod (58) is coaxially and fixedly connected to the corresponding rotating disk (52). A second gear (59) is fixedly connected to the rotating rod (58). The upper end of the processing platform (1) is fixedly connected with a second rack (510) through a second support rod. The second gear (59) meshes with the second rack (510).

9. The accessory bolt processing device for mechanical equipment according to claim 8, characterized in that, A T-shaped block (6) is fixedly connected to the side wall of each moving side plate (51). A guiding rod (61) is fixedly connected to the upper end of the processing platform (1). The guiding rod (61) passes through and is slidably connected to the T-shaped block (6).

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