High-precision forming device and method for a multi-revolution actuator limiting cam

Abstract

The application discloses a high-precision forming and processing device and method for a multi-rotation actuator limiting cam, and belongs to the technical field of limiting cam processing devices and methods.The device comprises a precision reaming processing mechanism, wherein the precision reaming processing mechanism comprises a frame arranged on a bottom plate, a first motor is arranged on the top of the frame, a rotating shaft and a reciprocating lead screw are coaxially connected to the output shaft of the first motor in sequence, a joint is arranged between the reciprocating lead screw and a first telescopic rod, and a reamer is detachably arranged on the bottom of the movable end of the first telescopic rod; a sliding block is spirally driven on the reciprocating lead screw, and a first ring is fixedly arranged on the outer wall of the sliding block.The device can solve the problem that the corresponding scraps generated in the precision reaming processing cannot be removed in time, which influences the processing precision and quality of the limiting cam, the vibration amplitude of the noise changes when the air pump works, and the noise reduction mechanism is often only aimed at the vibration amplitude of single noise, and the adaptability is poor.

Description

Technical Field

[0001] This invention belongs to the technical field of limit cam processing devices and methods, specifically relating to a high-precision forming processing device and method for multi-rotor actuator limit cams. Background Technology

[0002] A multi-turn actuator is an industrial automation drive device with an output shaft rotation angle exceeding 360 degrees. It is primarily used to drive valves with linear stem movements, enabling remote opening, closing, or regulation control. The limit cam in a rotary electric actuator is a key mechanical component used for precisely controlling the opening and closing positions of valves or equipment. The limit cam typically works in conjunction with a microswitch, triggering an electrical signal through physical contact to cut off the motor power and record the current position.

[0003] During the finishing process of the locating cam, a small hole needs to be machined with a reamer to improve the hole diameter accuracy and surface quality. Subsequent polishing is also required to remove tool marks and improve the smoothness of the locating cam surface. During precision reaming, metal chips are generated. If these chips are not removed promptly, they will affect the machining accuracy and quality of the locating cam. Furthermore, during polishing, dust is typically drawn into a purification system using an air pump. However, when the piston in the air pump reaches its top and bottom dead centers, it slightly impacts the cylinder head and cylinder bottom, generating noise. The amplitude of this noise vibration varies with different power levels, but noise reduction mechanisms often only target the amplitude of a single noise source, resulting in poor adaptability and impacting the working environment. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision forming and processing device and method for multi-rotation actuator limit cams, in order to solve the technical problem that in precision reaming, the corresponding metal chips generated cannot be removed in time, which will affect the processing accuracy and quality of the limit cams. Also, when the air pump is working, the vibration amplitude of the noise will change accordingly. Noise reduction mechanisms are often only aimed at the vibration amplitude of a single noise, and have poor adaptability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-precision forming and machining device for multi-rotor actuator limit cams includes: A precision reaming mechanism includes a frame placed on a base plate, a first motor mounted on the top of the frame, a rotating shaft and a reciprocating screw coaxially connected to the output shaft of the first motor in sequence, the reciprocating screw and a first telescopic rod being connected by a coupling, and a reamer being detachably mounted on the bottom of the movable end of the first telescopic rod. The reciprocating screw has a slider that is screwed on it. A first ring is fixedly installed on the outer wall of the slider. The first ring and the extended end of the outer wall of the frame are connected by a second telescopic rod. A second ring is installed on both sides of the bottom end of the first ring through a movable rod. The second ring is limited to move on the outer wall of the first telescopic rod, and the outer wall of the movable end of the first telescopic rod is provided with an annular groove that connects to the second ring.

[0006] Furthermore, both ends of the outer wall of the rotating shaft are connected to L-shaped telescopic rods via crossbeams. The middle part of the L-shaped telescopic rod is fixed, and the two sides are movable ends. The horizontal movable end of one side of the L-shaped telescopic rod is connected to a fan placed outside the first workbench via a bracket, and the vertical movable end of the other side is installed on a rotating rod. One end of the rotating rod is installed in the rotating groove of the outer wall of the first ring by a movable abutment, and the other end of the rotating rod is connected to the horizontal movable end of the L-shaped telescopic rod via a first swing rod.

[0007] Furthermore, a downwardly recessed receiving cavity is provided on the outer edge of the first ring, and a ball ball that contacts the bottom surface of the rotating rod is movably installed on the inner wall of the receiving cavity. The two ends of the first swing rod are rotatably connected to the horizontal movable ends of the rotating rod and the L-shaped telescopic rod, respectively. A movable cavity is provided between the rotating rod and the extended end of the outer wall of the frame.

[0008] Furthermore, it also includes a polishing and cleaning mechanism, which includes a second workbench placed on a base plate. Both sides of the second workbench are equipped with panels placed on top of the base plate. A second motor is fixedly installed on the panel. The output shaft of the second motor passes through the panel and extends to the grinding wheel. A dust collection hood is provided above the second workbench. One end of the dust collection hood is equipped with a side plate through a fixing rod, and the top of the dust collection hood is connected to a processing box through a conduit.

[0009] Furthermore, the processing box is equipped with an air pump connected to a conduit. Both sides of the air pump are provided with a first silencing plate placed at the bottom of the inner wall of the processing box. The first silencing plate is a vertical telescopic structure, and a horizontally distributed second silencing plate is positioned and installed at the movable end of the top of the first silencing plate.

[0010] Furthermore, both the first and second silencers have silencer holes, and the second silencer is connected to the cylinder on the processing box via a push rod. The first silencer, the second silencer, and the inner wall of the processing box together form a silencer cavity. One end of the conduit on the air pump passes through the first silencer and extends to the water tank on one side of the partition.

[0011] Furthermore, the second silencing plate is slidably connected to the first guide groove in the height direction of the inner wall of the processing box, and the partition is slidably connected to the second guide groove in the length direction of the inner wall of the processing box. The second silencing plate and the partition are connected by a second swing rod. The two ends of the second swing rod are rotatably connected to the second silencing plate and the partition, respectively. A baffle plate is hinged to one end of the partition near the air inlet of the water tank.

[0012] Furthermore, the outer wall of the baffle plate is integrally formed with protrusions on all four sides, and a sealing cavity is formed between the protrusions and the air inlet of the water tank. One end of the conduit is connected to the air inlet of the water tank through a telescopic tube, and a sealing ring connected to the partition plate is installed on the outer edge of the telescopic tube by adhesive fixation.

[0013] A high-precision forming and machining method for a multi-rotation actuator limit cam includes the following steps: S1.1 Place the limiting cam on the first worktable, start the first motor, and under the action of mechanical transmission, the first telescopic rod drives the reamer to process the positioning hole on the limiting cam. With the help of the rotational connection of the first swing rod, and in conjunction with the fan connected to one end of the L-shaped telescopic rod, the distance between the fan and the limiting cam is adjusted during the rotation of the fan, so as to blow away the debris generated during the processing of the positioning hole in a timely manner. After steps S1.2 and S1.1 are completed, the limiting cam is placed on the second worktable, the second motor is started to drive the grinding wheel to rotate, and the smoothness of the limiting cam surface is improved by grinding and polishing. The dust generated during the grinding process is sucked into the processing box through the dust collection hood on the air pump. In steps S1.3 and S1.2, when the air pump is working, the transmission components in the air pump will generate impact noise with different vibration amplitudes under different power levels. At this time, the cylinder is started, which drives the second silencer plate to move up and down. By changing the size of the silencer cavity, it can adapt to the noise with different vibration amplitudes. When the second silencer plate moves, under the rotational connection of the second swing rod, it can adaptively change the water depth in the water tank to adapt to the intake of different volumes of smoke particles by the purification duct.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) In this invention, a precision reaming mechanism is set up. Stable mechanical transmission is achieved by relying on a first motor-driven rotating shaft and a reciprocating lead screw. The first telescopic rod is linked by a coupling to drive the reamer to complete the precision reaming operation of the positioning hole of the limiting cam. Simultaneously, a limiting and guiding structure is adopted, consisting of a slider, a first ring, and a second ring. The second ring is movably fitted into the annular groove on the outer wall of the first telescopic rod, which can limit and correct the telescopic rod's extension and retraction stroke, avoiding offset problems during reamer processing and improving the coaxiality and dimensional accuracy of the positioning hole. The entire mechanical transmission structure is stably linked with small operating errors, improving the product processing qualification rate.

[0015] (2) In this invention, a linked fan chip removal structure is set up. The L-shaped telescopic rod is connected to the crossbeams at both ends of the rotating shaft, and a linkage transmission mechanism is formed by the rotating rod and the first swing rod. While the reamer is precision reaming, the fan can be driven to achieve adaptive position adjustment in real time, adjusting the distance between the fan and the machining point of the limit cam, and blowing away the metal chips generated during the machining of the positioning hole in an instant. This structure can realize the simultaneous processing and chip removal, avoiding problems such as scratches on the hole wall, dimensional deviations, and burr residue caused by metal chips remaining at the machining point. At the same time, it eliminates the need for subsequent manual chip removal, effectively improving processing efficiency.

[0016] (3) In this invention, a polishing and cleaning mechanism is provided. After the precision reaming process, the surface of the limiting cam can be automatically polished by driving the grinding wheel with the second motor, effectively removing burrs and scratches from the cam surface and improving the overall surface finish of the limiting cam. At the same time, a dust collection hood, duct and treatment box are combined to form a closed dust collection system, which can collect the metal fumes and fine dust generated in the polishing process in all directions, avoiding dust dispersion and pollution of the workshop environment. The treatment box is equipped with an adaptively adjustable silencing structure. A closed silencing cavity is formed by the vertical telescopic first silencing plate and the horizontally lifting second silencing plate, and the linkage adjustment is achieved by the cylinder, push rod and second swing rod. For vibration noise of different amplitude and frequency generated by the air pump under different working power, the internal volume of the silencing cavity can be changed by adjusting the height of the second silencing plate to adaptively match the noise characteristics under different working conditions. At the same time, silencing holes are evenly opened on the surface of the two silencing plates, which can absorb and block the impact noise generated by the operation of the air pump, reduce the operating noise of the equipment, improve the workshop working environment and reduce the noise pollution of the equipment.

[0017] (4) In this invention, the second swing rod links the second silencing plate and the partition plate, which can simultaneously drive the partition plate to move while the noise reduction structure is adjusted, adaptively adjusting the effective water depth of the water tank inside the treatment box, accurately adapting to the purification needs of grinding dust particles of different processing stages and different sizes, and ensuring that the dust and water are fully in contact for purification. At the same time, the air inlet of the water tank is equipped with a baffle plate, a protrusion and a sealing ring and a telescopic tube sealing structure, which can form a sealed cavity, effectively avoiding dust leakage and water seepage, ensuring the sealing performance of the dust removal and purification system, and eliminating secondary pollution during the dust removal process. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram of the structure of a high-precision forming and processing device for a multi-rotation actuator limit cam according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a high-precision forming and processing device for a multi-rotation actuator limit cam according to the present invention. Figure 2 ; Figure 3 This is a front view of a high-precision forming and processing device for a multi-rotation actuator limit cam according to the present invention; Figure 4 This is the present invention. Figure 1 Enlarged view of point A; Figure 5 This is the present invention. Figure 1 Enlarged view of point B; Figure 6 This is a schematic diagram of the interior of the processing box of the present invention; Figure 7 This is a schematic diagram of the structure of the first and second sound-absorbing plates of the present invention; Figure 8 This is the present invention. Figure 6 Enlarged view of point C; Figure 9 This is a flowchart illustrating a high-precision forming process for a multi-rotation actuator limit cam according to the present invention.

[0020] Reference numerals: 1. Precision reaming mechanism; 2. Frame; 3. First motor; 4. Rotating shaft; 5. Reciprocating lead screw; 6. First telescopic rod; 7. Reamer; 8. Slider; 9. First ring; 10. Second telescopic rod; 11. Moving rod; 12. Second ring; 13. Crossbeam; 14. L-shaped telescopic rod; 15. First worktable; 16. Fan; 17. Rotating rod; 18. First swing rod; 19. Receiving cavity; 20. Ball; 21. Polishing and cleaning mechanism; 22. Second workbench; 23. Panel; 24. Second motor; 25. Grinding wheel; 26. Dust collection hood; 27. Side plate; 28. Processing box; 29. ​​Air pump; 30. First silencer plate; 31. Second silencer plate; 32. Silencing hole; 33. Cylinder; 34. Push rod; 35. Silencing chamber; 36. Partition plate; 37. Water tank; 38. Second swing rod; 39. Baffle plate; 40. Protrusion; 41. Telescopic tube. Detailed Implementation

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

[0022] Reference manual attached Figure 1 - Appendix Figure 8 As shown, the present invention discloses a high-precision forming and processing device for a multi-rotation actuator limit cam, including a precision reaming mechanism 1 and a polishing and cleaning mechanism 21. The two mechanisms are integrated and installed on the upper surface of the equipment base plate, and complete the precision hole processing and surface polishing and cleaning operations of the limit cam in sections, with close connection between the processes.

[0023] The precision reaming mechanism 1 includes a frame 2 fixedly mounted on the upper surface of the base plate. A first motor 3 is horizontally fixedly mounted on the top of the frame 2. The bottom end of the output shaft of the first motor 3 is coaxially fixedly connected to a rotating shaft 4. The bottom end of the rotating shaft 4 is coaxially fixedly connected to a reciprocating screw 5, so that the first motor 3 can synchronously drive the rotating shaft 4 and the reciprocating screw 5 to rotate at a uniform speed when running.

[0024] The bottom end of the reciprocating screw 5 is coaxially and fixedly connected to the fixed end of the first telescopic rod 6 through a rigid coupling. The bottom of the vertically set movable end of the first telescopic rod 6 is equipped with a bolt-mounted reamer 7. The reamer 7 can be quickly replaced according to the hole diameter of the positioning hole of the limit cam, and is easy to disassemble and assemble with strong adaptability.

[0025] A slider 8 is mounted on the outer side of the reciprocating screw 5 via a helical drive. When the reciprocating screw 5 rotates, it drives the slider 8 to perform a reciprocating linear motion along the screw 5. A first ring 9 is connected to the outer wall of the slider 8. The outer wall of the frame 2 is integrally formed and extends outward to form an extension end. A second telescopic rod 10 is vertically mounted between the first ring 9 and the extension end of the frame 2. The two ends of the second telescopic rod 10 are fixedly connected to the upper end face of the first ring 9 and the lower end face of the extension end of the frame 2 respectively via hinge seats. This can limit and guide the movement trajectory of the first ring 9 and the slider 8, preventing the slider 8 from circumferentially deflecting as the reciprocating screw 5 rotates, and ensuring the stability of the vertical movement.

[0026] The bottom ends of the first ring 9 are both vertically fixed with movable rods 11, which are symmetrically distributed. The bottom end of each movable rod 11 is fixedly fitted with a second ring 12, so that the second ring 12 and the first ring 9 move synchronously. The second ring 12 is coaxially limited and sleeved on the outer wall of the first telescopic rod 6. The outer wall of the movable end of the first telescopic rod 6 has an annular groove. The inner wall of the second ring 12 is limited and engaged inside the annular groove, and can slide relative to the first telescopic rod 6 along the annular groove, further limiting the telescopic movement of the first telescopic rod 6 radially and improving the reaming accuracy of the positioning hole of the limiting cam.

[0027] Crossbeams 13 are symmetrically fixed at both ends of the outer wall of the rotating shaft 4. The crossbeams 13 are set perpendicular to the shaft 4. An L-shaped telescopic rod 14 is fixedly installed at the outer end of the crossbeam 13. The L-shaped telescopic rod 14 adopts a fixed middle section and a bidirectional movable end structure design. The middle section is rigidly fixed to the end of the crossbeam 13, and both the horizontal and vertical sections are telescopic structures, which can realize bidirectional precise telescopic adjustment. The horizontal movable end of the L-shaped telescopic rod 14 is equipped with a fan 16 through a fixed bracket. The fan 16 is correspondingly set in the outer area of ​​the first worktable 15. The first worktable 15 is fixedly installed on the upper surface of the base plate, directly below the reamer 7, and is used to place the limiting cam workpiece to be processed.

[0028] A rotating rod 17 is fixedly mounted on the vertical movable end of the L-shaped telescopic rod 14. A rotating groove is annularly formed on the outer wall of the first ring 9. One end of the rotating rod 17 is limited and abutted against inside the rotating groove, allowing it to slide along the groove's trajectory and achieve adaptive rotation adjustment. A first swing rod 18 is mounted between the rod body of the rotating rod 17 and the horizontal movable end of the L-shaped telescopic rod 14. The two ends of the first swing rod 18 are rotatably connected to the rotating rod 17 and the horizontal movable end of the L-shaped telescopic rod 14 respectively via rotating pins, forming a linkage transmission structure. During the up-and-down movement of the first ring 9 with the slider 8, the rotating rod 17 can be driven to deflect at an angle. Combined with the hinged transmission of the first swing rod 18, this drives the horizontal movable end of the L-shaped telescopic rod 14 to extend and retract, thereby changing the distance between the blower 16 and the upper limit cam workpiece of the first worktable 15. This achieves adaptive adjustment of the blowing range and blowing force, removing metal debris generated during reaming.

[0029] Furthermore, the outer edge of the first ring 9 has a downwardly recessed receiving cavity 19, and several rolling balls 20 are movably mounted inside the receiving cavity 19. The tops of the rolling balls 20 are in close contact with the bottom surface of the rotating rod 17. The rolling balls 20 can roll freely, which can reduce the sliding friction resistance between the rotating rod 17 and the first ring 9 and ensure the smoothness of the angle adjustment of the rotating rod 17. The hinge structure at both ends of the first swing rod 18 can adaptively match the deflection angle of the rotating rod 17, and the extended end of the outer wall of the frame 2 has a movable cavity at the corresponding position of the rotating rod 17.

[0030] This device is also equipped with a polishing and cleaning mechanism 21, which is used to complete the surface polishing, dust purification, and noise reduction of the limiting cam after precision reaming. The polishing and cleaning mechanism 21 includes a second worktable 22 fixed to the upper surface of the base plate. The second worktable 22 and the first worktable 15 are arranged in sections, corresponding to the precision reaming and polishing processes respectively, without interfering with each other. Panels 23 are vertically fixedly installed on both the left and right sides of the second worktable 22. The two panels 23 are symmetrically distributed on the outer side of the second worktable 22. A second motor 24 is fixedly installed on the outer wall of each panel 23. The output shaft of the second motor 24 horizontally passes through the panel 23 and extends to the inner side of the panel 23. A grinding wheel 25 is fixedly installed at the end of the output shaft. The two grinding wheels 25 are symmetrically corresponding to the processing area above the second worktable 22, which can simultaneously polish the two sides of the limiting cam placed on the second worktable 22.

[0031] A dust collection hood 26 is suspended above the second workbench 22. Side plates 27 are vertically mounted on the side walls of the dust collection hood 26 via fixing rods. The side plates 27 are fixedly connected to the panel 23, ensuring stable suspension of the dust collection hood 26. A fixed suction duct is connected to the center of the top of the dust collection hood 26, and the end of the suction duct connects to the interior of a processing box 28. The processing box 28 is fixedly installed on the upper surface of the base plate, on the side of the second workbench 22, for the unified purification and treatment of the smoke and exhaust gas generated during polishing operations.

[0032] An air pump 29 is fixedly installed at the bottom of the interior of the processing box 28. The air inlet of the air pump 29 is sealed and connected to the dust suction duct of the dust collection hood 26. The negative pressure suction of the air pump 29 continuously draws the polishing fumes and dust into the interior of the processing box 28. First silencers 30 are vertically installed on both sides of the air pump 29. The bottom of the first silencer 30 is fixed to the bottom of the inner wall of the processing box 28 and adopts a vertical telescopic structure design, allowing for height adaptive telescopic adjustment. A second silencer 31 is horizontally assembled between the movable top ends of the two first silencers 30. The second silencer 31 is horizontally mounted inside the processing box 28, perpendicular to the first silencers 30, together forming a closed noise reduction and buffer structure.

[0033] The surfaces of the first silencer plate 30 and the second silencer plate 31 are evenly arrayed with a plurality of silencer holes 32. The silencer holes 32 adopt a microporous structure design, which can buffer and silence the mechanical noise and airflow noise generated by the operation of the air pump 29 in multiple ways. A cylinder 33 is fixedly installed on the inner wall of the top of the processing box 28. The telescopic end of the cylinder 33 is vertically and fixedly connected to a push rod 34. The bottom end of the push rod 34 is fixedly connected to the center of the upper end face of the second silencer plate 31. The extension and retraction of the cylinder 33 can drive the second silencer plate 31 to move smoothly up and down in the vertical direction. The first silencer plate 30, the second silencer plate 31 and the inner wall of the processing box 28 together form a sealed silencer cavity 35. The internal volume of the silencer cavity 35 can change in real time with the lifting and lowering of the second silencer plate 31 to adapt to the different vibration amplitude noise generated by the air pump 29 under different operating power.

[0034] A partition 36 is horizontally fixed in the middle of the interior of the treatment box 28. The partition 36 divides the interior of the treatment box 28 into a noise reduction zone and a purification zone. The purification zone is filled with clean water to form a water tank 37. The dust suction pipe connected to the air pump 29 passes through the first silencer 30 and extends into the water in the water tank 37, so that the sucked-in smoke and dust can be directly introduced into the water. The dust and particulate matter are purified by water bath sedimentation, avoiding direct emission of exhaust gas and causing pollution.

[0035] The left and right ends of the second silencer plate 31 are slidably fitted into the first guide groove opened in the height direction of the inner wall of the treatment box 28. The first guide groove limits the lifting and lowering movement of the second silencer plate 31. The left and right ends of the partition plate 36 are slidably fitted into the second guide groove opened in the length direction of the inner wall of the treatment box 28, and can be adjusted horizontally by reciprocating along the second guide groove. The lower end face of the second silencer plate 31 and the upper end face of the partition plate 36 are hingedly fitted with a second swing rod 38. When the second silencer plate 31 moves up and down, the rotation of the second swing rod 38 drives the partition plate 36 to slide horizontally, adaptively changing the effective water storage volume and water depth inside the water tank 37 to match the purification treatment needs of different volumes of smoke and dust, and improve the purification effect.

[0036] One end of the partition 36 near the air inlet of the water tank 37 is hinged to a baffle 39. The baffle 39 can rotate slightly around the hinge to open and close, adapting to the impact force of the incoming airflow and preventing backflow. The outer wall of the baffle 39 has integrally formed protrusions 40 around its edges. When the baffle 39 is closed, the protrusions 40 fit tightly against the end face of the air inlet of the water tank 37, forming a sealed cavity, improving the airtightness of the air inlet and preventing unpurified dust from leaking out from gaps. The water outlet of the suction duct is sealed and connected to the air inlet of the water tank 37 via a telescopic tube 41. The telescopic tube 41 can be adjusted horizontally to accommodate the partition 36, maintaining a sealed pipeline at all times.

[0037] Reference manual attached Figure 9 A high-precision forming and machining method for a multi-rotation actuator limit cam, specifically including the following steps: S1.1 Precision reaming and debris removal: The multi-rotor actuator limit cam to be processed is manually and stably placed on the upper surface of the first worktable 15. The limit cam is precisely positioned and fixed by the positioning fixture on the worktable to prevent workpiece displacement during processing. The first motor 3 is started, and the first motor 3 drives the rotating shaft 4 and the reciprocating screw 5 to rotate synchronously. The screw drive of the reciprocating screw 5 drives the slider 8 to reciprocate in the vertical direction. At the same time, the coupling drives the first telescopic rod 6 to drive the bottom reamer 7 to move down precisely to perform precision reaming of the preset positioning hole position of the limit cam. During the processing, the first ring 9 moves synchronously with the slider 8, driving the rotating rod 17 to adaptively deflect at an angle. In conjunction with the hinge linkage of the first swing rod 18, it drives the bidirectional movable end of the L-shaped telescopic rod 14 to adaptively extend and retract, changing the installation position, blowing angle, and spacing of the blower 16. The fan 16 continuously generates directional airflow, which can thoroughly blow away metal debris and fine iron filings generated during the reaming process from the inside of the positioning hole and the surface of the workpiece in real time. This prevents debris residue from causing scratches on the hole wall and deviations in hole diameter accuracy, ensuring the forming accuracy and smoothness of the positioning hole. After the reaming is completed, the first motor 3 is reversed to drive the reamer 7 to reset, completing a single precision reaming process.

[0038] S1.2 Surface Polishing and Dust Collection: The precision-reamed limiting cam is removed from the first worktable 15 and placed stably on the upper surface of the second worktable 22 for positioning and fixation. The second motors 24 on both sides are started, driving the grinding wheels 25 to rotate at high speed. The grinding wheels 25 on both sides simultaneously perform uniform grinding and polishing on the upper and lower surfaces and side contours of the limiting cam, removing burrs, machining marks and oxide layers from the workpiece surface, greatly improving the surface smoothness and dimensional accuracy of the limiting cam, meeting the assembly and use requirements of multi-rotation actuators. The air pump 29 is started throughout the polishing operation. The air pump 29 generates continuous negative pressure suction through the dust collection hood 26, sucking all the metal fumes and fine dust particles generated during the polishing process into the dust collection duct and uniformly transporting them into the treatment box 28, avoiding the spread of fumes and dust that would cause environmental pollution in the workshop, and preventing dust from adhering to the workpiece surface and affecting the polishing quality.

[0039] S1.3 Adaptive Noise Reduction and Smoke Purification Operation: When the air pump 29 operates under different power conditions, its internal transmission components will generate operating noise with different vibration amplitudes and frequencies. At the same time, the amount of smoke and dust generated at different stages of the polishing process varies significantly. At this time, the cylinder 33 is activated, which drives the second silencer plate 31 to move vertically up and down along the first guide groove through the push rod 34. This changes the internal volume of the silencer cavity 35 in real time. By adaptively adjusting the volume, it matches the mechanical noise with different vibration amplitudes and frequencies. Combined with the silencer holes 32 on the first silencer plate 30 and the second silencer plate 31, multiple noise reductions are achieved, effectively reducing equipment operating noise and improving the working environment.

[0040] While the second silencer plate 31 is raised and lowered, the second swing rod 38 drives the partition plate 36 to slide horizontally along the second guide groove, adaptively adjusting the effective depth and water volume inside the water tank 37. When the amount of dust particles is large and the dust concentration is high in the initial polishing stage, the partition plate 36 slides to expand the effective volume of the water tank 37, increasing the water depth and improving the dust settling and purification capacity. When the amount of dust is smaller in the later polishing stage, the volume of the water tank 37 adaptively decreases. Simultaneously, the telescopic pipe 41 extends and retracts adaptively with the partition plate 36, forming a sealing cavity with the sealing ring and the protrusion 40 to ensure the air intake pipe is sealed and prevent dust leakage. The dust-laden airflow entering the water tank 37 is thoroughly washed and settled by the water, with all dust particles remaining in the water, and the purified clean air is discharged.

[0041] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0042] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-precision forming and processing device for a multi-rotation actuator limit cam, characterized in that, include: The precision reaming mechanism (1) includes a frame (2) placed on a base plate. A first motor (3) is installed on the top of the frame (2). The output shaft of the first motor (3) is coaxially connected to a rotating shaft (4) and a reciprocating screw (5). The reciprocating screw (5) and a first telescopic rod (6) are connected by a coupling. A reamer (7) is detachably installed at the bottom of the movable end of the first telescopic rod (6). The reciprocating screw (5) has a slider (8) for screw drive. A first ring (9) is fixedly installed on the outer wall of the slider (8). The first ring (9) and the extension end of the outer wall of the frame (2) are connected by a second telescopic rod (10). A second ring (12) is installed on both sides of the bottom end of the first ring (9) through a moving rod (11). The second ring (12) is limited to move on the outer wall of the first telescopic rod (6). The outer wall of the movable end of the first telescopic rod (6) is provided with an annular groove that connects to the second ring (12).

2. The high-precision forming and processing device for a multi-rotation actuator limit cam according to claim 1, characterized in that, Both ends of the outer wall of the rotating shaft (4) are connected to L-shaped telescopic rods (14) via crossbeams (13). The middle part of the L-shaped telescopic rod (14) is fixed, and the two sides are movable ends. The horizontal movable end of one side of the L-shaped telescopic rod (14) is connected to a fan (16) placed outside the first workbench (15) via a bracket. The vertical movable end of the other side is installed on a rotating rod (17). One end of the rotating rod (17) is installed in the rotating groove of the outer wall of the first ring (9) by a movable abutment. The other end of the rotating rod (17) is connected to the horizontal movable end of the L-shaped telescopic rod (14) via a first swing rod (18).

3. The high-precision forming and processing device for a multi-rotation actuator limit cam according to claim 2, characterized in that, The outer edge of the first ring (9) has a recessed cavity (19) and a ball (20) that contacts the bottom surface of the rotating rod (17) is installed in a limited position on the inner wall of the cavity (19). The two ends of the first swing rod (18) are rotatably connected to the horizontal movable ends of the rotating rod (17) and the L-shaped telescopic rod (14), respectively. A movable cavity is provided between the rotating rod (17) and the extended end of the outer wall of the frame (2).

4. The high-precision forming and processing device for multi-rotation actuator limit cam according to claim 3, characterized in that, It also includes a polishing and cleaning mechanism (21), which includes a second workbench (22) placed on the base plate. The second workbench (22) has a panel (23) on the top of the base plate installed on both sides of the outside. A second motor (24) is fixedly installed on the panel (23). The output shaft of the second motor (24) passes through the panel (23) and extends to the grinding wheel (25). A dust collection hood (26) is provided above the second workbench (22). A side plate (27) is installed at one end of the dust collection hood (26) through a fixing rod. A processing box (28) is connected to the top of the dust collection hood (26) through a conduit.

5. The high-precision forming and processing device for a multi-rotation actuator limit cam according to claim 4, characterized in that, The processing box (28) is equipped with an air pump (29) connected to a conduit. The air pump (29) is provided with a first silencing plate (30) on both sides of the outside of the processing box (28) at the bottom of the inner wall. The first silencing plate (30) is a vertical telescopic structure, and a horizontally distributed second silencing plate (31) is positioned and installed at the movable end of the top of the first silencing plate (30).

6. The high-precision forming and processing device for a multi-rotation actuator limit cam according to claim 5, characterized in that, The first silencing plate (30) and the second silencing plate (31) are both provided with silencing holes (32), and the second silencing plate (31) and the cylinder (33) on the processing box (28) are connected by a push rod (34). The first silencing plate (30), the second silencing plate (31) and the inner wall of the processing box (28) together form a silencing cavity (35). One end of the conduit on the air pump (29) passes through the first silencing plate (30) and extends to the water tank (37) on one side of the partition (36).

7. The high-precision forming and processing device for a multi-rotation actuator limit cam according to claim 6, characterized in that, The second silencing plate (31) is slidably connected to the first guide groove in the height direction of the inner wall of the processing box (28), and the partition plate (36) is slidably connected to the second guide groove in the length direction of the inner wall of the processing box (28). The second silencing plate (31) and the partition plate (36) are connected by a second swing rod (38). The two ends of the second swing rod (38) are rotatably connected to the second silencing plate (31) and the partition plate (36) respectively. A baffle plate (39) is hinged to one end of the partition plate (36) near the air inlet of the water tank (37).

8. The high-precision forming and processing device for multi-rotation actuator limit cam according to claim 7, characterized in that, The outer wall of the shield (39) is integrally formed with protrusions (40) on all four sides, and a sealing cavity is formed between the protrusions (40) and the air inlet of the water tank (37). One end of the conduit is connected to the air inlet of the water tank (37) through a telescopic pipe (41). The outer edge of the telescopic pipe (41) is fitted with a sealing ring that is connected to the partition (36) by adhesive fixation.

9. A method for high-precision forming and machining of a multi-rotation actuator limit cam, applied to the high-precision forming and machining device for a multi-rotation actuator limit cam as described in claim 8, characterized in that, Includes the following steps: S1.1 Place the limiting cam on the first worktable (15), start the first motor (3), and under the action of mechanical transmission, the first telescopic rod (6) drives the reamer (7) to process the positioning hole on the limiting cam. With the help of the rotational connection of the first swing rod (18), and in conjunction with the fan (16) connected to one end of the L-shaped telescopic rod (14), the distance between the fan (16) and the limiting cam is adjusted during the rotation of the fan (16), so as to blow away the debris generated during the processing of the positioning hole in time. After S1.2 and S1.1 are completed, the limiting cam is placed on the second worktable (22), the second motor (24) is started to drive the grinding wheel (25) to rotate, and the smoothness of the limiting cam surface is improved by grinding and polishing. The dust generated during the grinding process is sucked into the processing box (28) through the dust collection hood (26) on the air pump (29). In steps S1.3 and S1.2, when the air pump (29) is working, the transmission components in the air pump (29) will generate impact noise with different vibration amplitudes under different power. At this time, the cylinder (33) starts and drives the second silencer plate (31) to move up and down. By changing the volume of the silencer cavity (35), it can adapt to the noise with different vibration amplitudes. When the second silencer plate (31) moves, under the rotational connection of the second swing rod (38), it can adapt to the water depth in the water tank (37) to adapt to the intake of different amounts of smoke particles by the purification duct.

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