Cold rolling forming device for planetary roller screw rod

Abstract

The invention relates to the technical field of screw rod machining equipment, and discloses a planetary roller screw rod cold rolling forming device which comprises a fixed rack, a first driving motor is assembled on one side of the top of the fixed rack, the output end of the first driving motor is in transmission connection with a driving screw rod, and the end of the driving screw rod is fixedly connected with a rotating disc; a driving block is fixedly connected to the external eccentric position of the rotating disc, a movable seat is in sliding fit with the outer surface of the rotating disc, and two limiting plates are fixedly connected to the outer side of the movable seat. In the cold rolling machining process of a workpiece, the rubber piston can be synchronously linked to reciprocate along the interior of the fixing cylinder, cold rolling oil conveying driving equipment does not need to be additionally arranged, automatic extraction of cold rolling oil in the storage box can be achieved through the second connecting pipe, and the cold rolling oil is directionally sprayed to the outer surface of a cold rolling roller through the first connecting pipe; it is ensured that cold rolling oil accurately acts on the contact machining area of the lead screw and the cold roller, the lubricating effect is effectively enhanced, and friction loss is reduced.

Description

Technical Field

[0001] This invention relates to the field of lead screw processing equipment technology, specifically to a cold rolling forming device for planetary roller lead screws. Background Technology

[0002] Planetary roller screws, as core transmission components with high precision, high load-bearing capacity, and long service life, are widely used in fields with stringent requirements for transmission accuracy, such as CNC machine tools, aerospace servo systems, and precision automation equipment. Their processing quality directly determines the operational stability and control precision of downstream equipment. Among them, cold rolling forming process has become the mainstream processing method for mass production of planetary roller screws because it can improve the surface hardness and wear resistance of the screw through cold extrusion, reduce material cutting loss, and ensure the integrity and consistency of the thread profile. The performance of the cold rolling forming equipment is a key factor affecting the processing efficiency, accuracy, and production cost of the screw.

[0003] In the practice of planetary roller screw cold rolling forming, in order to reduce the friction coefficient between the cold rolling roll and the workpiece and suppress the thermal deformation of the workpiece caused by the heat generated by the plastic deformation of the metal during the processing, existing equipment generally needs to continuously supply cold rolling oil to the cold rolling contact area. The current mainstream solution mostly uses an independent oil pump motor to drive the cold rolling oil delivery, and uses pipelines to guide the cold rolling oil to the processing area. At the same time, in order to realize the recycling of cold rolling oil, an oil collection tank and filter screen are set at the bottom of the equipment so that the cold rolling oil flows back to the oil storage tank after filtering out impurities. However, the addition of an independent oil pump motor and supporting control module not only increases the overall structural complexity of the equipment and the initial manufacturing cost, but also requires additional power consumption. Moreover, during long-term use, the filter screen is prone to blockage due to the accumulation of impurities such as metal chips and oxide scale generated during the cold rolling process, requiring periodic shutdown for manual cleaning. Regarding burr removal, after cold rolling, burrs easily remain on the edges and end faces of the thread profile of the lead screw. If not removed promptly, this can lead to assembly jamming, decreased transmission accuracy, and even accelerated component wear. In existing technologies, this problem is often solved in two ways: one is to use a separate deburring device to perform secondary processing on the cold-rolled lead screw; the other is to add a separate deburring station next to the cold rolling unit, where the workpiece is manually or mechanically transferred from the cold rolling unit to the deburring device. However, the configuration of separate equipment increases workshop floor space and equipment investment costs. The workpiece transfer process not only prolongs the processing cycle but may also cause damage to the lead screw surface or fluctuations in deburring accuracy due to collisions and positioning deviations during transfer, making it difficult to meet the needs of high-efficiency mass production. Therefore, those skilled in the art have proposed a cold rolling forming device for planetary roller lead screws to solve the above problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a cold rolling forming apparatus for planetary roller screws, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cold rolling forming apparatus for planetary roller screws, comprising a fixed frame, a drive motor mounted on one side of the top of the fixed frame, a drive screw connected to the output end of the drive motor, a rotating disk fixedly connected to the end of the drive screw, a drive block fixedly connected to the outer eccentric position of the rotating disk, a movable seat slidably fitted on the outer surface of the rotating disk, two limiting plates fixedly connected to the outer side of the movable seat, two fixed cylinders fixedly mounted on the top of the fixed frame, and connecting links sequentially connected to the outer surfaces of the fixed cylinders. Connecting pipe one and connecting pipe two, a rubber piston is slidably connected inside the fixed cylinder, a movable rod is fixedly connected to the outside of the rubber piston, a storage box is detachably assembled on the inside of the fixed frame, and a cleaning component is configured at the bottom of the movable seat; the rotating disk is driven by drive motor one to rotate, which drives the drive block to make eccentric motion, and then drives the movable seat to move back and forth in the horizontal direction. Under the linkage traction of the limit plate and the movable rod, the rubber piston is driven to slide back and forth along the inner wall of the fixed cylinder, and the cold rolling oil in the storage box is transported to connecting pipe one through connecting pipe two, and sprayed out directionally from the port of connecting pipe one.

[0006] Through the above technical solution, the power of the drive motor enables the coordinated action of multiple mechanisms. Without the need for additional cold rolling oil delivery drive equipment, the rubber piston can be driven to reciprocate through the transmission of the rotating disc, drive block, and movable seat. This achieves automatic extraction of cold rolling oil from the storage tank and directional spraying into the processing area, ensuring precise application of the cold rolling oil to the cold rolling section of the lead screw. This effectively enhances lubrication to reduce friction loss, suppresses thermal deformation during processing through cooling, and guarantees the forming accuracy of the lead screw. Simultaneously, the cleaning component prevents filter clogging during cold rolling oil return filtration, ensuring the stability of the cold rolling oil circulation. Overall, the equipment structure is simplified, energy consumption and equipment investment costs are reduced, and the processing efficiency and continuous operation capability of the device are improved.

[0007] Preferably, the cleaning assembly includes a filter screen detachably connected to the top of the storage box, a rack two fixedly connected to the bottom of the movable seat, a drive gear rotatably mounted on the top of the fixed frame via a bearing, a rack one slidably disposed on the top of the fixed frame, and two unclogging plates fixedly connected to the outer side of the rack one, with both unclogging plates fitting snugly against the upper surface of the filter screen; the reciprocating movement of the movable seat drives the rack two to move synchronously, and through the meshing transmission of the drive gear, the rack one moves reciprocally in the horizontal direction, thereby driving the unclogging plates to slide along the outer surface of the filter screen, thus achieving anti-clogging and unclogging of the filter screen.

[0008] Through the above technical solution, and by linking with the movable seat, no additional drive equipment is required. The reciprocating movement of the movable seat can drive the rack and pinion to move, and through the meshing transmission of the drive gear, the rack and pinion moves synchronously back and forth, thereby driving the unblocking plate to slide along the surface of the filter screen. This achieves real-time anti-clogging and unblocking of the filter screen, ensuring that the cold rolling oil flows smoothly back to the storage tank after being filtered by the filter screen. This avoids affecting the circulation efficiency of the cold rolling oil due to filter screen blockage. At the same time, the detachable design of the filter screen facilitates subsequent maintenance and cleaning, further improving the overall operational stability and maintenance convenience of the device.

[0009] Preferably, the outer side of rack two is meshed with the outer side of the drive gear, and the outer side of rack one is meshed with the outer side of the drive gear.

[0010] Through the above technical solution, a stable power transmission path is constructed between rack two, drive gear, and rack one. This ensures that when the movable seat drives rack two to move back and forth, the power can be accurately transmitted to rack one through the drive gear. This allows rack one to move horizontally in the opposite direction synchronously with rack two, thereby ensuring that the unblocking plate can slide stably along the filter screen surface to achieve anti-clogging and unblocking. This avoids power loss or jamming during the transmission process, ensuring the reliability of power transmission and the synchronicity of the cleaning components, and providing structural support for the continuous and smooth filtration of the filter screen.

[0011] Preferably, a one-way valve is installed on the inner side of both the first connecting pipe and the second connecting pipe. The two one-way valves have opposite conduction directions. The end of the second connecting pipe away from the fixed cylinder is connected to the inside of the storage tank to realize the one-way delivery and backflow blocking of the cold rolling oil.

[0012] Through the above technical solution, a one-way flow channel for cold rolling oil is constructed by using one-way valves with opposite conduction directions on the inner sides of connecting pipe 1 and connecting pipe 2, combined with the connection relationship between connecting pipe 2 and the storage tank. This ensures that when the rubber piston slides back and forth, the cold rolling oil can only enter the fixed cylinder from the storage tank through connecting pipe 2, and then be sprayed out in a certain direction to the processing area through the connecting pipe. This effectively prevents the cold rolling oil from flowing back to the storage tank or flowing in the opposite direction, ensuring the stability and continuity of the cold rolling oil delivery direction. It also avoids insufficient oil supply to the processing area or contamination of the cold rolling oil in the storage tank due to oil backflow, providing a reliable guarantee for the lubrication and cooling effect of the screw cold rolling process.

[0013] Preferably, the outer side of the drive screw is threadedly connected to a second support base, the inner side of the second support base is equipped with a chuck for clamping the workpiece, the chuck is equipped with an independent drive motor to realize rotational action, and the top side of the fixed frame is fixedly connected to a first support base for auxiliary support.

[0014] Through the above technical solution, the threaded connection between the drive screw and the second support base can drive the chuck and the clamped workpiece to feed stably. The independent drive motor of the chuck enables the workpiece to rotate, ensuring that the workpiece can fully contact the cold rolling roll to complete the cold rolling forming. At the same time, the first support base provides auxiliary support for the workpiece, preventing the workpiece from shaking or deforming during feeding and rotation due to excessive cantilever length. This ensures the stability and forming accuracy of the workpiece during processing, providing reliable workpiece clamping and motion control for the precise cold rolling of planetary roller screws.

[0015] Preferably, a bevel gear one is fixedly connected to the outer side of the drive screw, and two bevel gears two are meshed to the outer side of the bevel gear one. A connecting shaft is fixedly connected to the outer side of the bevel gears two, and a fixed disk is fixedly connected to one end of the connecting shaft. A hinge rod is rotatably connected to the outer eccentric part of the fixed disk. Movable plates are slidably installed on both the front and rear sides of the top of the fixed frame. A connecting strip is fixedly connected to one side of the top of the movable plate, and a movable seat is fixedly connected to one side of the connecting strip. Multiple friction pairs are provided on the inner side of the movable seat. One end of the hinge rod is rotatably connected to the end of the movable plate away from the connecting strip. The drive motor one drives the bevel gear one to rotate, which in turn drives the bevel gear one, the connecting shaft, and the fixed disk to rotate synchronously. In this way, the hinge rod drives the movable plate, the connecting strip, and the movable seat to move synchronously, thereby deburring the screw after cold rolling.

[0016] Through the above technical solution, the meshing transmission of bevel gear one and bevel gear two drives the connecting shaft and fixed disk to rotate, and then the hinge rod converts it into the reciprocating movement of the movable plate. Finally, the moving seat and the inner friction pair are driven to contact and slide relative to the surface of the cold-rolled screw, so as to realize the synchronous deburring treatment of the screw. This not only eliminates the investment in independent deburring equipment and the workpiece transfer steps, reducing costs and improving processing efficiency, but also ensures that the deburring action is stable and controllable, effectively removing burrs from the surface of the screw and the edge of the thread, ensuring the smoothness of the screw surface and the subsequent assembly accuracy.

[0017] Preferably, a connecting seat is fixedly connected to the top of the fixed frame, and the connecting seat is used to restrict the vertical movement of the limiting plate.

[0018] By limiting the vertical movement of the limiting plate, the movable seat is ensured to move stably only in the horizontal direction under the drive block. This avoids deviation in the linkage traction between the movable seat and the movable rod due to vertical offset, thereby ensuring that the rubber piston can slide precisely back and forth along the inner wall of the fixed cylinder to stably deliver cold rolling oil. At the same time, it also provides support for the stable displacement of rack two in the subsequent cleaning component, preventing the swaying of the movable seat from affecting the synchronization and reliability of the actions of various related mechanisms, and ensuring the overall operating accuracy of the device.

[0019] Preferably, a second drive motor is installed on one side of the bottom of the fixed frame. The output end of the second drive motor is fixedly connected to a connecting shaft. A worm is fixedly connected to the outside of the connecting shaft. A worm wheel is meshed with the outside of the worm. A bidirectional screw is fixedly connected to the outside of the worm wheel. Two mounting seats are connected to the external threads of the bidirectional screw.

[0020] Through the above technical solution, power is transmitted to the bidirectional screw via the connecting shaft, worm gear, and worm wheel. When the bidirectional screw rotates, it drives the two mounting seats connected by external threads to move axially towards or away from each other. Precise and stable control of the mounting seat position can be achieved without manual adjustment. This provides a reliable power transmission and displacement adjustment basis for subsequent adjustment of the cold rolling roll spacing, meeting the needs of different specifications of planetary roller screws for roll spacing adjustment during cold rolling, and improving the ease of operation and adaptability of the device.

[0021] Preferably, two slide rods are fixedly connected to the top of the fixed frame, a connecting seat is slidably connected to the outer surface of the slide rods, a mounting shell is fixedly connected to the outer side of the connecting seat, a cold rolling roll is installed on the inner side of the mounting shell, the cold rolling roll is driven by a motor, and the connecting seat is fixedly connected to the top of the mounting seat.

[0022] Through the above technical solution, the sliding limit of the connecting seat by the slide bar ensures that the connecting seat can slide stably along the slide bar when the mounting seat moves, thereby allowing the cold rolling rolls inside the mounting shell to maintain a stable displacement for precise adjustment of the spacing, adapting to the cold rolling requirements of workpieces of different specifications; at the same time, the cold rolling rolls are driven to rotate by an independent motor, ensuring that they can stably provide the rotational power required for cold rolling processing. The combination of the two not only realizes the reliable adjustment of the cold rolling roll spacing, but also ensures the stable progress of the cold rolling process, providing support for the precise forming of the planetary roller screw.

[0023] Preferably, the inner side of the movable seat is provided with a movable groove, and the drive block is movably disposed inside the movable groove.

[0024] The above technical solution provides space for the drive block to move through the movable groove on the inner side of the movable seat. When the drive block moves eccentrically with the rotating disk, it can slide smoothly in the movable groove and transmit power to the movable seat. This stabilizes the rotational motion of the rotating disk into the horizontal reciprocating movement of the movable seat, avoiding transmission jamming between the drive block and the movable seat. This ensures the stable operation of subsequent related mechanisms such as the reciprocating sliding of the rubber piston to transport cold rolling oil and the synchronous action of the cleaning components, providing a reliable transmission foundation for the coordinated realization of various functions of the device.

[0025] This invention provides a cold rolling forming apparatus for planetary roller screws. It has the following beneficial effects: 1. During the cold rolling process of the workpiece, this invention allows for the synchronous reciprocating movement of a rubber piston within a fixed cylinder. Without the need for additional cold rolling oil delivery equipment, the cold rolling oil in the storage tank can be automatically extracted via connecting pipe two. The oil is then directionally sprayed onto the outer surface of the cold rolling roll through connecting pipe one, ensuring precise application of the oil to the contact area between the lead screw and the roll. This effectively enhances lubrication, reducing frictional losses, and simultaneously suppresses thermal deformation through cooling, ensuring the precision of the lead screw's cold rolling process. Furthermore, the sprayed cold rolling oil can be filtered through a screen to remove impurities and then returned to the source. The system forms a cold rolling oil recycling system by transferring the oil to a storage tank, eliminating the need for additional waste liquid treatment or oil replenishment equipment and significantly reducing cold rolling oil consumption and equipment investment costs. In addition, the device can simultaneously unclog the filter screen during cold rolling and cold rolling oil circulation by coordinating the cleaning components and the main moving mechanism, avoiding filter screen blockage caused by impurity accumulation. It can ensure the stability of cold rolling oil circulation and filtration effect without the need for an additional filter screen cleaning drive device. Thus, it improves the overall processing efficiency and continuous operation capability of the device while simplifying the equipment structure, reducing energy consumption and costs.

[0026] 2. In the process of cold rolling the workpiece, the present invention can synchronously drive the bevel gear one outside the drive screw to rotate by the power of the drive motor one. Through the meshing transmission of bevel gear one and bevel gear two, the linkage connecting shaft and the fixed disk rotate synchronously. Then, through the hinge rod eccentrically set on the fixed disk, the movable plate, connecting bar and moving seat are driven to move synchronously along the fixed frame. This makes the friction pair on the inner side of the moving seat precisely fit and move relative to the surface of the cold rolled screw, realizing synchronous deburring of the screw. This design does not require additional independent deburring drive equipment. Through the coordinated linkage of the transmission mechanism and the cold rolling main drive system, the residual burrs on the surface of the screw after cold rolling are effectively removed without increasing energy consumption or equipment space occupation, ensuring the smoothness and dimensional accuracy of the screw surface.

[0027] 3. This invention drives the connecting shaft to rotate via a drive motor. Through the fixed connection between the connecting shaft and the worm, and the meshing transmission between the worm and the worm wheel, the bidirectional screw outside the worm wheel is indirectly driven to rotate synchronously. This causes the two mounting seats threaded to the outside of the bidirectional screw to move towards or away from each other along the axial direction of the bidirectional screw. In turn, this drives the cold rolling rolls inside the mounting housing to move synchronously to adjust the gap between the two cold rolling rolls. This achieves precise control of the cold rolling roll gap, ensuring the adaptability of the roll gap required for cold rolling of planetary roller screws of different specifications, meeting the cold rolling processing needs of diverse workpieces, and broadening the application range of the device. Attached Figure Description

[0028] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the support base structure of the present invention; Figure 3 This is a schematic diagram of the storage box structure of the present invention; Figure 4 This is a schematic diagram of the fixed frame structure of the present invention; Figure 5 This is a schematic diagram of the connecting pipe structure of the present invention; Figure 6 for Figure 2 Enlarged view of point A in the middle; Figure 7 for Figure 2 Enlarged view of point B in the middle; Figure 8 for Figure 5 Enlarged view of point C in the middle; Figure 9 This is a cross-sectional view of the storage box of the present invention.

[0029] The components include: 1. Fixed frame; 2. Mounting housing; 3. Cold rolling roll; 401. Drive motor one; 402. Drive screw; 403. Support base one; 404. Support base two; 405. Chuck; 501. Fixed plate; 502. Hinge rod; 503. Movable plate; 504. Connecting bar; 505. Moving seat; 506. Bevel gear one; 507. Bevel gear two; 508. Connecting shaft; 601. Filter screen; 602. Rack one; 603. Drive motor... 604. Drive gear; 605. Rack 2; 706. Unblocking plate; 707. Fixed cylinder; 708. Connecting pipe 1; 709. Connecting pipe 2; 7000. Movable rod; 7001. Limiting plate; 7002. Connecting seat; 701. Storage box; 702. Movable seat; 703. Drive block; 704. Bidirectional screw; 705. Mounting seat; 706. Slide rod; 707. Connecting seat; 708. Worm gear; 709. Worm wheel; 7000. Connecting shaft; 7000. Rotating disk; 7000. Drive motor 2. Detailed Implementation

[0030] The technical solutions in 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.

[0031] Please see the appendix Figure 1 - Appendix Figure 9This invention provides a cold rolling forming apparatus for planetary roller screws, including a fixed frame 1. A drive motor 401 is mounted on one side of the top of the fixed frame 1. The output end of the drive motor 401 is connected to a drive screw 402. A rotating disk 18 is fixedly connected to the end of the drive screw 402. A drive block 10 is fixedly connected to the outer eccentric position of the rotating disk 18. A movable seat 9 is slidably fitted on the outer surface of the rotating disk 18. Two limiting plates 705 are fixedly connected to the outer side of the movable seat 9. Two fixed cylinders 701 are fixedly mounted on the top of the fixed frame 1. A connecting pipe 702 and a connecting pipe 703 are sequentially connected to the outer surface of the fixed cylinders 701. A rubber piston is slidably connected inside the fixed cylinder 701, and a movable rod 704 is fixedly connected to the outside of the rubber piston. A storage tank 8 is detachably mounted on the inside of the fixed frame 1, and a cleaning component is configured at the bottom of the movable seat 9. The rotating disk 18 is driven to rotate by the drive motor 401, which drives the drive block 10 to make eccentric movements, thereby driving the movable seat 9 to move back and forth in the horizontal direction. Under the linkage traction of the limit plate 705 and the movable rod 704, the rubber piston is driven to slide back and forth along the inner wall of the fixed cylinder 701, and the cold rolling oil in the storage tank 8 is transported to the connecting pipe 702 through the connecting pipe 703, and is sprayed out directionally from the port of the connecting pipe 702. One-way valves are installed on the inside of both the connecting pipe 702 and the connecting pipe 703. The two one-way valves have opposite conduction directions. The end of the connecting pipe 703 away from the fixed cylinder 701 is connected to the inside of the storage tank 8, realizing the one-way delivery and backflow prevention of the cold rolling oil. A connecting seat 706 is fixedly connected to the top of the fixed frame 1. The connecting seat 706 is used to limit the vertical movement of the limiting plate 705. A movable groove is provided on the inner side of the movable seat 9, and the driving block 10 is movably disposed inside the movable groove.

[0032] Specifically, after the drive motor 401 starts, it outputs power to drive the drive screw 402 to rotate, and the rotating disk 18 fixed to the end of the drive screw 402 rotates synchronously. Since the drive block 10 is eccentrically fixed to the outside of the rotating disk 18 and is movably embedded in the movable groove inside the movable seat 9, the rotation of the rotating disk 18 will cause the drive block 10 to slide along the movable groove, thereby driving the movable seat 9 to reciprocate in the horizontal direction. The limiting plate 705 on the outside of the movable seat 9 maintains stable movement under the vertical limiting action of the connecting seat 706. At the same time, the limiting plate 705 and the movable rod 704 on the outside of the rubber piston inside the fixed cylinder 701 form a linkage traction. The rubber piston slides back and forth along the inner wall of the fixed cylinder 701. When the rubber piston slides, it changes the air pressure inside the fixed cylinder 701. When the air pressure decreases, the cold rolling oil in the storage tank 8 enters the fixed cylinder 701 through the connecting pipe 2 703 under the action of pressure difference. When the air pressure increases, the cold rolling oil is squeezed to the connecting pipe 1 702 and sprayed out directionally from its port. The one-way valves inside the connecting pipe 1 702 and the connecting pipe 2 703 have opposite conduction directions, which can ensure that the cold rolling oil can only enter the fixed cylinder 701 from the storage tank 8 through the connecting pipe 2 703 and then be sprayed out through the connecting pipe 1 702, realizing the one-way delivery and backflow blocking of the cold rolling oil, and ensuring a stable supply of cold rolling oil to the processing area.

[0033] The cleaning assembly includes a filter screen 601 detachably connected to the top of the storage tank 8, a rack 604 fixedly connected to the bottom of the movable seat 9, a drive gear 603 rotatably mounted on the top of the fixed frame 1 via bearings, and a rack 602 slidably mounted on the top of the fixed frame 1. Two unclogging plates 605 are fixedly connected to the outer side of the rack 602, and both unclogging plates 605 are fitted to the upper surface of the filter screen 601. The reciprocating movement of the movable seat 9 drives the rack 604 to move synchronously. Through the meshing transmission of the drive gear 603, the rack 602 moves reciprocally in the horizontal direction, thereby driving the unclogging plates 605 to slide along the outer surface of the filter screen 601, thus achieving anti-clogging and unclogging of the filter screen 601. The outer side of the rack 604 meshes with the outer side of the drive gear 603, and the outer side of the rack 602 meshes with the outer side of the drive gear 603.

[0034] Specifically, when the movable seat 9 reciprocates horizontally under the drive mechanism, the rack 604 fixed at its bottom moves synchronously. Since the rack 604 meshes with the drive gear 603 mounted on the top of the fixed frame 1 via a bearing, the reciprocating movement of the rack 604 drives the drive gear 603 to rotate alternately in both directions. Also, since the rack 602 meshes with the drive gear 603, the alternating rotation of the drive gear 603 is converted into the rack 602 moving horizontally along the top of the fixed frame 1. The two unblocking plates 605 fixed on the outside of the rack 602 fit snugly against the upper surface of the filter screen 601 on the top of the storage tank 8. The reciprocating movement of the rack 602 drives the unblocking plates 605 to slide continuously along the outer surface of the filter screen 601, thereby scraping away the impurities accumulated on the surface of the filter screen 601, achieving anti-clogging and unblocking of the filter screen 601, and ensuring the smooth flow of the cold rolling oil filtration return channel.

[0035] The drive screw 402 is threadedly connected to a support base 404. The inner side of the support base 404 is equipped with a chuck 405 for clamping the workpiece. The chuck 405 is equipped with an independent drive motor to realize rotation. The top side of the fixed frame 1 is fixedly connected to a support base 403 for auxiliary support.

[0036] Specifically, when the drive screw 402 rotates under the drive of the drive motor 401, the support seat 404, which is threaded to the outside of the drive screw 402, moves along the axial direction of the drive screw 402, thereby driving the chuck 405 mounted on its inner side and the workpiece held by the chuck 405 to move synchronously, realizing the feeding of the workpiece into the cold rolling processing area; the independent drive motor configured on the chuck 405 can drive the chuck 405 to rotate itself, thereby driving the clamped workpiece to rotate synchronously, so that the outer surface of the workpiece can fully contact the cold rolling roll 3 and achieve uniform cold rolling; at the same time, the support seat 403 fixed on one side of the top of the fixed frame 1 can form an auxiliary support for the end of the workpiece away from the chuck 405, avoiding the workpiece from shaking or deforming due to excessive cantilever length during feeding and rotation, and ensuring the stability and forming accuracy of the workpiece during cold rolling processing.

[0037] A bevel gear 506 is fixedly connected to the outer side of the drive screw 402. Two bevel gears 507 are meshed with the outer side of the bevel gear 506. A connecting shaft 508 is fixedly connected to the outer side of the bevel gears 507. A fixed disk 501 is fixedly connected to one end of the connecting shaft 508. A hinge rod 502 is rotatably connected to the outer eccentric part of the fixed disk 501. Movable plates 503 are slidably installed on both the front and rear sides of the top of the fixed frame 1. A connecting strip 504 is fixedly connected to one side of the top of the movable plate 503. A movable seat 505 is fixedly connected to one side of the screw. Multiple friction pairs are provided on the inner side of the movable seat 505. One end of the hinge rod 502 is rotatably connected to the end of the movable plate 503 away from the connecting bar 504. The drive motor 401 drives the bevel gear 506 to rotate, which in turn drives the bevel gear 506, the connecting shaft 508 and the fixed plate 501 to rotate synchronously. In this way, the hinge rod 502 drives the movable plate 503, the connecting bar 504 and the movable seat 505 to move synchronously, and deburring the screw after cold rolling.

[0038] Specifically, when the drive motor 401 outputs power to drive the drive screw 402 to rotate, it rotates synchronously with the bevel gear 506 fixed to one side of the drive screw 402. Because the bevel gear 506 meshes with the outer sides of the two bevel gears 507, the rotation of the bevel gear 506 will drive the two bevel gears 507 to rotate synchronously, thereby driving the connecting shaft 508 fixed to the outer side of the bevel gears 507 and the fixed disk 501 fixed at one end of the connecting shaft 508 to rotate synchronously. The hinge rod 502 rotatably connected to the eccentric part of the fixed disk 501 rotates eccentrically with the fixed disk 501. The movable plate 503 is pulled or pushed by the end of the movable plate 503 that is far away from the fixed plate 501, causing the movable plate 503, which is slidably installed on the front and rear sides of the top of the fixed frame 1, to move back and forth in the horizontal direction. When the movable plate 503 moves, the movable seat 505 fixed on one side of the connecting bar 504 fixed on the top side moves synchronously. The multiple friction pairs on the inner side of the movable seat 505 then come into contact with the surface of the screw after cold rolling and produce relative sliding, thereby grinding away the burrs remaining on the surface of the screw and the edge of the thread, and realizing the synchronous deburring treatment of the screw.

[0039] A drive motor 19 is mounted on one side of the bottom of the fixed frame 1. A connecting shaft 17 is fixedly connected to the output end of the drive motor 19. A worm gear 15 is fixedly connected to the outer side of the connecting shaft 17. A worm wheel 16 is meshed with the outer side of the worm gear 15. A double-acting screw 11 is fixedly connected to the outer side of the worm wheel 16. Two mounting seats 12 are threadedly connected to the outer side of the double-acting screw 11. Two sliding rods 13 are fixedly connected to the top of the fixed frame 1. A connecting seat 14 is slidably connected to the outer surface of the sliding rod 13. A mounting shell 2 is fixedly connected to the outer side of the connecting seat 14. A cold rolling roll 3 is mounted on the inner side of the mounting shell 2. The cold rolling roll 3 is driven by a motor. The connecting seat 14 is fixedly connected to the top of the mounting seat 12.

[0040] Specifically, when it is necessary to adjust the spacing of the cold rolling rolls 3 to accommodate workpieces of different specifications, the drive motor 19 on one side of the bottom of the fixed frame 1 is started. Its output end drives the fixed connecting shaft 17 to rotate, and the worm 15 fixed on the outside of the connecting shaft 17 rotates together. Because the worm 15 meshes with the outer side of the worm wheel 16, the rotation of the worm 15 will drive the worm wheel 16 and the bidirectional screw 11 fixed on the outside of the worm wheel 16 to rotate synchronously. The two mounting seats 12 connected to the external threads of the bidirectional screw 11 move towards or away from each other along its axial direction under the action of the rotation of the bidirectional screw 11. The mounting base 12 is fixedly connected to the connecting base 14, and the connecting base 14 is slidably sleeved on the outer surface of the slide rod 13 on the top of the fixed frame 1. The movement of the mounting base 12 will drive the connecting base 14 to slide stably along the slide rod 13. Then, through the mounting shell 2 fixed on the outside of the connecting base 14, the cold rolling roll 3 installed on its inner side will move synchronously, and finally the precise adjustment of the distance between the two cold rolling rolls 3 will be achieved to meet the cold rolling processing requirements of planetary roller screws of different sizes. The cold rolling roll 3 itself is driven to rotate by an independent motor to ensure the normal progress of the cold rolling process.

[0041] Working principle: The following are the detailed operating principles when using this device: First, the bar stock to be processed is precisely clamped by the chuck 405 inside the second support base 404. The first support base 403 provides auxiliary support to the other end of the workpiece, ensuring the stability of the workpiece clamping. The first drive motor 401 is started, and its output end drives the drive screw 402 to rotate. Since the second support base 404 is threadedly connected to the drive screw 402, the second support base 404 will move slowly along the axial direction of the drive screw 402. At the same time, the chuck 405 drives the workpiece to rotate under the drive of the independent drive motor, so that the workpiece fully contacts and is squeezed with the cold rolling roll 3 inside the mounting shell 2. The cold rolling of the workpiece's thread structure is achieved by driving the rotation of the cold rolling roll 3.

[0042] During the rotation of the drive screw 402, the rotating disk 18 at its end rotates synchronously. The drive block 10, eccentrically positioned outside the rotating disk 18, slides along the movable groove inside the movable seat 9, thereby driving the movable seat 9 to reciprocate horizontally. The limiting plate 705 on the outer side of the movable seat 9 remains vertically stable under the limiting constraint of the connecting seat 706. Simultaneously, the rubber piston inside the fixed cylinder 701 is pulled by the movable rod 704 to reciprocate. Utilizing the change in air pressure inside the fixed cylinder 701, cold rolling oil is drawn from the storage tank 8 through the connecting pipe 2 703, and then directionally sprayed onto the contact area between the cold rolling roll 3 and the workpiece through the connecting pipe 1 702, achieving lubrication and cooling. The one-way valves in the connecting pipe 1 702 and the connecting pipe 2 703 ensure unidirectional delivery of cold rolling oil and prevent backflow. After being sprayed, the cold rolling oil, carrying processing impurities, is filtered through the filter screen 601 and then returned to the storage tank 8, forming a recycling process. At the same time, when the movable seat 9 moves back and forth, it drives the second rack 604 at the bottom to move synchronously. Through the meshing transmission of the drive gear 603, the first rack 602 drives the unblocking plate 605 to slide back and forth along the upper surface of the filter screen 601, clearing the impurities accumulated on the surface of the filter screen 601 in real time and preventing the filter screen 601 from becoming clogged.

[0043] When the drive screw 402 rotates, its external bevel gear 506 rotates synchronously. Through meshing with two bevel gears 507, it drives the connecting shaft 508 and the fixed disk 501 at the end to rotate. The hinge rod 502 at the eccentric position of the fixed disk 501 then performs eccentric movement, driving the movable plate 503 to reciprocate along the sliding trajectory at the top of the fixed frame 1 under the action of traction force. The movable plate 503 drives the moving seat 505 to move synchronously through the connecting strip 504, so that the friction pair on the inner side of the moving seat 505 precisely fits and slides relative to the surface of the cold-rolled workpiece, realizing the synchronous removal of burrs on the surface of the workpiece and the edge of the thread profile.

[0044] When adjusting the spacing of the cold rolling rolls 3 to process planetary roller screws of different specifications, the drive motor 19 is started. Its output end drives the connecting shaft 17 and the outer worm gear 15 to rotate. The worm gear 15 meshes with the worm wheel 16, thereby driving the bidirectional screw 11 to rotate. Since the two mounting seats 12 are threadedly connected to the bidirectional screw 11, and the mounting seats 12 are slidably engaged with the slide rod 13 through the connecting seat 14, the rotation of the bidirectional screw 11 drives the two mounting seats 12 to move in opposite directions or away along the axial direction. Finally, the mounting shell 2 drives the cold rolling rolls 3 to move synchronously, realizing the precise adjustment of the spacing of the cold rolling rolls 3 to meet the processing requirements of workpieces of different sizes.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cold rolling forming apparatus for planetary roller screws, comprising a fixed frame (1), characterized in that, A drive motor (401) is mounted on one side of the top of the fixed frame (1). A drive screw (402) is fixedly connected to the output end of the drive motor (401). A rotating disk (18) is fixedly connected to the end of the drive screw (402). A drive block (10) is fixedly connected to the outer eccentric position of the rotating disk (18). A movable seat (9) is slidably fitted on the outer surface of the rotating disk (18). Two limiting plates (705) are fixedly connected to the outer side of the movable seat (9). Two fixed cylinders (701) are fixedly connected to the top of the fixed frame (1). A connecting pipe (702) and a connecting pipe (703) are sequentially connected to the outer surface of the fixed cylinder (701). An internally sealed sliding connection is provided with a rubber piston, and a movable rod (704) is fixedly connected to the outside of the rubber piston. A storage box (8) is detachably assembled on the inner side of the fixed frame (1), and a cleaning component is provided at the bottom of the movable seat (9). The rotating disk (18) is driven to rotate by the drive motor (401), which drives the drive block (10) to make eccentric movements, thereby driving the movable seat (9) to move back and forth in the horizontal direction. Under the linkage traction of the limit plate (705) and the movable rod (704), the rubber piston is driven to slide back and forth along the inner wall of the fixed cylinder (701), and the cold rolling oil in the storage box (8) is transported to the connecting pipe (702) through the connecting pipe (703), and sprayed out directionally from the port of the connecting pipe (702).

2. The cold rolling forming apparatus for planetary roller screws according to claim 1, characterized in that, The cleaning assembly includes a filter screen (601) detachably connected to the top of the storage box (8), a rack two (604) fixedly connected to the bottom of the movable seat (9), a drive gear (603) rotatably mounted on the top of the fixed frame (1) via a bearing, a rack one (602) slidably disposed on the top of the fixed frame (1), and two unclogging plates (605) fixedly connected to the outer side of the rack one (602), and both unclogging plates (605) are fitted to the upper surface of the filter screen (601); the reciprocating movement of the movable seat (9) drives the rack two (604) to move synchronously, and through the meshing transmission of the drive gear (603), the rack one (602) moves reciprocally in the horizontal direction, thereby driving the unclogging plates (605) to slide along the outer surface of the filter screen (601), thereby realizing the anti-clogging and unclogging of the filter screen (601).

3. The cold rolling forming apparatus for planetary roller screws according to claim 2, characterized in that, The outer side of rack two (604) meshes with the outer side of drive gear (603), and the outer side of rack one (602) meshes with the outer side of drive gear (603).

4. The cold rolling forming apparatus for planetary roller screws according to claim 1, characterized in that, One-way valves are installed on the inner sides of both the first connecting pipe (702) and the second connecting pipe (703). The two one-way valves have opposite conduction directions. The end of the second connecting pipe (703) away from the fixed cylinder (701) is connected to the inside of the storage tank (8) to realize the one-way delivery and backflow blocking of cold rolling oil.

5. The cold rolling forming apparatus for planetary roller screws according to claim 1, characterized in that, The drive screw (402) is threadedly connected to a support base two (404), and the support base two (404) is equipped with a chuck (405) for clamping the workpiece on its inner side. The chuck (405) is equipped with an independent drive motor to realize rotation. The top side of the fixed frame (1) is fixedly connected to a support base one (403) for auxiliary support.

6. The cold rolling forming apparatus for a planetary roller screw according to claim 1, characterized in that, A bevel gear 1 (506) is fixedly connected to the outer side of the drive screw (402). Two bevel gears 2 (507) are meshed with the outer side of the bevel gear 1 (506). A connecting shaft (508) is fixedly connected to the outer side of the bevel gears 2 (507). A fixed disk (501) is fixedly connected to one end of the connecting shaft (508). A hinge rod (502) is rotatably connected to the outer eccentric part of the fixed disk (501). Movable plates (503) are slidably installed on both the front and rear sides of the top of the fixed frame (1). A connecting strip (504) is fixedly connected to one side of the top of the movable plate (503). A movable seat (505) is fixedly connected to one side of the strip (504). Multiple friction pairs are provided on the inner side of the movable seat (505). One end of the hinge rod (502) is rotatably connected to the end of the movable plate (503) away from the connecting strip (504). The drive motor (401) drives the bevel gear (506) to rotate, which in turn drives the bevel gear (506), the connecting shaft (508), and the fixed plate (501) to rotate synchronously. In this way, the hinge rod (502) drives the movable plate (503), the connecting strip (504), and the movable seat (505) to move synchronously, and deburring is performed on the screw after cold rolling.

7. The cold rolling forming apparatus for planetary roller screws according to claim 6, characterized in that, The top of the fixed frame (1) is fixedly connected to a connecting seat (706), which is used to restrict the vertical movement of the limiting plate (705).

8. The cold rolling forming apparatus for planetary roller screws according to claim 1, characterized in that, A second drive motor (19) is installed on one side of the bottom of the fixed frame (1). A connecting shaft (17) is fixedly connected to the output end of the second drive motor (19). A worm (15) is fixedly connected to the outside of the connecting shaft (17). A worm wheel (16) is meshed with the outside of the worm (15). A double screw (11) is fixedly connected to the outside of the worm wheel (16). Two mounting seats (12) are connected to the external threads of the double screw (11).

9. The cold rolling forming apparatus for a planetary roller screw according to claim 8, characterized in that, The top of the fixed frame (1) is fixedly connected to two slide rods (13). The outer surface of the slide rods (13) is slidably connected to a connecting seat (14). The outer side of the connecting seat (14) is fixedly connected to a mounting shell (2). The inner side of the mounting shell (2) is equipped with a cold rolling roller (3). The cold rolling roller (3) is driven by a motor. The connecting seat (14) is fixedly connected to the top of the mounting seat (12).

10. The cold rolling forming apparatus for a planetary roller screw according to claim 1, characterized in that, The movable seat (9) has a movable groove on its inner side, and the drive block (10) is movably disposed inside the movable groove.

Images