A reverse type planetary roller screw pair roller rolling device and method

Abstract

This invention relates to the field of reverse planetary roller screw machining technology, and discloses a reverse planetary roller screw pair roller rolling device. It adopts a double-sided symmetrical force-applying rolling working structure, ensuring balanced force on the screw rollers during machining, which is beneficial for improving the machining accuracy of the roller screw. Synchronous gear seats are provided on the lower sides of the two sets of drive docking seats. The two sets of synchronous gear seats are centrally symmetrically distributed and mesh with a synchronous gear set in the middle of the support beam seat. Through the meshing transmission of the synchronous gear seats and the synchronous gear, synchronous displacement correction of the double-sided servo drive seats can be achieved, avoiding the imbalance of forces on both sides caused by abnormal differential movement of the pressure-guided drive cylinder, which is beneficial for improving the reliability and machining accuracy of the device. A central shaft guide support type machining positioning auxiliary structure is adopted. With the cooperation of the positioning support and the guide cylinder seat, it can be ensured that the screw rollers are always in the coaxial machining position during machining, which is beneficial for improving the machining accuracy of the screw rollers.

Description

Technical Field

[0001] This invention relates to the field of reverse planetary roller screw processing technology, specifically to a reverse planetary roller screw pair roller rolling device and method. Background Technology

[0002] Planetary roller screws are core mechanical transmission components that efficiently convert rotary motion into linear motion. They possess advantages such as high load capacity, high precision, and long service life, and are widely used in high-end equipment manufacturing fields such as aerospace, high-end CNC machine tools, industrial robots, and new energy vehicles. As the core and critical component of planetary roller screws, the tooth profile accuracy, surface quality, and mechanical properties of the rollers directly determine the overall transmission accuracy, load capacity, and operational reliability of the screw.

[0003] Axial rolling is a common processing method for rollers. In terms of structure, traditional rolling equipment is mostly unidirectional force rolling. Since the pressure roller only applies working pressure to one side of the roller, the working surface of the roller is unevenly stressed during the rolling process, which easily causes axial displacement and tooth asymmetry, making it difficult to meet the roller accuracy. Furthermore, for the machining positioning support of the roller screw, traditional rolling equipment mostly relies on a simple guide wheel structure set at the bottom of the platform to guide and support the roller screw. Its support stability and positioning accuracy are poor. During the machining and guiding process, the roller screw is prone to displacement due to uneven stress, affecting the rolling accuracy. Therefore, a reverse planetary roller screw pair roller rolling method and device are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a reverse planetary roller screw pair roller rolling apparatus and method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a reverse planetary roller screw pair roller rolling device, comprising a rolling structure for screw roller processing, a transmission mechanism and a positioning mechanism; The rolling structure is used for rolling the lead screw roller. The rolling structure includes a mounting support, a servo drive base, working rolls, and a pressure guide drive cylinder. The working rolls are arranged in pairs. The two sets of working rolls are supported by the servo drive base and installed on both sides of the middle of the mounting support in a left-right opposing position. The servo drive base is driven by the pressure guide drive cylinder to move horizontally in the middle of the mounting support. The transmission mechanism is located on both sides of the middle part of the mounting support for working transmission between the pressure-guiding drive cylinder and the servo drive seat. The positioning mechanism is used for guiding and positioning support of the lead screw roller. The positioning mechanism includes a positioning guide post, a positioning support, a telescopic drive cylinder and a guide cylinder seat. The positioning support is horizontally and movably installed on the side of the mounting support by the positioning guide post. The guide cylinder seat is horizontally and movably installed on the side of the mounting support by the telescopic drive cylinder.

[0006] Preferably, the working roll is rotatably mounted on the middle of the servo drive base via a rotating shaft, and the rotating shaft end of the working roll is connected to the drive output end on the side of the servo drive base for transmission.

[0007] Preferably, the two sets of servo drive seats are installed in the middle of the mounting support in a left-right facing position. A rectangular through slot is opened in the middle of the two side seats of the mounting support. The end seats of the servo drive seats are slidably supported and installed in the rectangular through slots. The upper and lower sides of the rectangular through slots are fixedly installed with sliding rail seats by bolts. The upper and lower sides of the end seats of the servo drive seats are fixedly installed with groove rail supports. The middle of the groove rail support is provided with a sliding guide groove. After installation, the sliding rail seats and the sliding guide groove are slidably fitted and supported.

[0008] Preferably, the transmission mechanism includes a drive connecting seat, a drive connecting arm, a drive docking seat, a synchronous gear seat, and a synchronous gear. The cylinder rod end of the pressure-guiding drive cylinder is connected to the servo drive seat through the drive connecting seat, the drive connecting arm, and the drive docking seat. The synchronous gear seat is installed on the lower part of the lower drive docking seat. The synchronous gear seats are arranged in pairs. The synchronous gear is rotatably mounted on the middle part of the mounting support. The two sets of synchronous gear seats are centrally symmetrical and meshed on both sides of the synchronous gear.

[0009] Preferably, drive supports are fixedly installed on both sides of the middle part of the above-mentioned mounting support by bolts. The pressure guiding drive cylinder is fixedly installed horizontally on the inner middle part of the drive support by bolts. The middle part of the drive connecting seat is hinged to the cylinder rod end of the pressure guiding drive cylinder. The drive connecting arms are arranged in pairs. The outer ends of the two sets of drive connecting arms are fixedly installed to the upper and lower ends of the drive connecting seat by bolts respectively. The drive docking seat is fixedly installed to the outer end of the servo drive seat by bolts. The inner end of the drive connecting arm is hinged to the middle part of the drive docking seat.

[0010] Preferably, a support beam seat is horizontally fixedly installed on the lower middle side of the aforementioned mounting bracket. The synchronous gear is rotatably mounted on the upper middle part of the support beam seat via a rotating shaft. One end of the synchronous gear seat is fixedly installed to the lower part of the lower drive docking seat via bolts. The other end of the synchronous gear seat is fixedly installed with a guide end post. The end of the guide end post is movably inserted into the guide insertion hole provided on the lower part of the drive docking seat. The inner side of the synchronous gear seat is provided with a meshing tooth groove. The inner side of the synchronous gear seat is meshed with the edge of the synchronous gear through the meshing tooth groove for transmission.

[0011] Preferably, the telescopic drive cylinders are arranged in pairs. The two sets of telescopic drive cylinders are fixedly installed on both sides of the middle part of the mounting bracket by bolts. The cylinder rod end of the telescopic drive cylinder is fixedly installed with a mounting block. The upper part of the guide cylinder seat is fixedly installed with the lower part of the mounting block by bolts. After installation, the middle part of the lead screw roller is slidably inserted into the guide through hole in the middle of the guide cylinder seat.

[0012] Preferably, multiple positioning guide posts are provided, and a mounting cylinder seat is fixedly installed in the middle of the mounting support. The positioning guide posts are fixedly installed through the middle of the mounting support by the mounting cylinder seat.

[0013] Preferably, the positioning supports are arranged in pairs. A guide sleeve is fixedly provided at the end of the bracket of the positioning support. The guide sleeve is slidably connected to the positioning guide post. A support shaft seat is rotatably installed in the middle of the positioning support through a bearing. A fastening bolt is provided on the edge of the support shaft seat. After installation, the end shaft of the lead screw roller is fixedly inserted into the positioning shaft hole in the middle of the support shaft seat through the fastening bolt.

[0014] A method for operating a reverse planetary roller screw pair roller rolling device includes the following steps: S1. Workpiece loading and installation: Adjust the position of the positioning support by sliding according to the length of the lead screw roller. Insert one end of the pre-treated lead screw roller into the middle of the guide cylinder seat on the material side. Then, insert the other end of the lead screw roller into the middle shaft hole of the support shaft seat in the middle of the positioning support from the inside. Tighten the fastening bolts to connect and limit the end shaft of the lead screw roller, and complete the workpiece loading and installation. S2. Initial Rolling: Set the processing parameters and complete the reset calibration of the work rolls. Slowly feed the end of the screw roller into the space between the two sets of work rolls by horizontal pushing. After completing the processing positioning calibration, the two sets of work rolls are driven by the pressure guide cylinder to synchronously approach the screw roller and clamp and support the shaft surface to be processed. Then, the two sets of work rolls are driven by the servo drive seat to rotate in opposite directions. The rolling processing of the screw roller shaft surface is completed with the pressure provided by the pressure guide cylinder. During the process, the synchronous displacement correction of the double-sided servo drive seats can be realized through the meshing transmission of the synchronous gear seat and the synchronous gear, avoiding the imbalance of force on both sides caused by abnormal differential of the pressure guide cylinder. When the screw roller performs axial feed movement, the positioning support and the guide cylinder support can realize the guide positioning support of the screw roller end shaft and the middle part, which can ensure that the screw roller is always in the coaxial processing position during the processing. S3. Secondary rolling: After the end of the lead screw roller passes through the guide cylinder seat on the other side, the positioning support on the free side is pushed and the end shaft of the lead screw roller is inserted and connected to the support shaft seat in the middle of the positioning support. The end shaft of the lead screw roller after insertion and installation is limited by the fastening bolts. Rolling continues to complete the rolling process of the remaining shaft surface. Then the working rolls work in the opposite direction. The lead screw roller is fed in the opposite direction by the auxiliary positioning support of the double positioning supports and the guide cylinder seat. The secondary rolling process of the lead screw roller is completed by the working rolls. S4. Processing and unloading: After rolling is completed, the two sets of working rolls are driven to move out of the rolling area by the pressure guide cylinder. Then, the fastening bolts in the middle of the support shaft seats on both sides are loosened in sequence. Then, the positioning support on the discharge side is pushed outward to leave enough space for the disassembly of the screw roller. Then, the screw roller is pulled out by the side to complete the unloading of the screw roller.

[0015] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects: 1. This rolling device adopts a double-sided symmetrical force-applying rolling working structure. Two sets of working rolls are driven by servo drive seats and are installed in the middle of the mounting support in an opposing position. The servo drive seats are driven by the pressure guide cylinder for lateral translation. The structure is simple and the operation is reliable. During operation, pressure guide can be applied simultaneously on both sides of the screw roller. During the processing, the screw roller is subjected to balanced force, which is conducive to improving the machining accuracy of the roller screw.

[0016] 2. The servo drive base transmits torque through the drive connecting arm and the drive docking seat. The structure is simple and the transmission is reliable. Synchronous gear seats are set on the lower side of the two sets of drive docking seats. The two sets of synchronous gear seats are centrally symmetrically distributed and mesh with the synchronous gear set in the middle of the support beam seat. During operation, the synchronous displacement correction of the servo drive bases on both sides can be realized through the meshing transmission of the synchronous gear seats and the synchronous gear, avoiding the imbalance of forces on both sides caused by abnormal differential movement of the pressure guide drive cylinder, which is conducive to improving the reliability of the device and the processing accuracy.

[0017] 3. The machining positioning auxiliary structure adopts a central axis guide support. Positioning supports are installed on the front and rear feed sides of the mounting support through positioning guide columns. A guide cylinder seat is installed on the outer side of the mounting support through a telescopic drive cylinder. During operation, the positioning supports and the guide cylinder seat cooperate to achieve the guiding and positioning support of the end shaft of the screw roller and the middle part. This ensures that the screw roller is always in the coaxial machining position during the machining process, which greatly improves the machining positioning accuracy and positioning support stability of the device and is conducive to improving the machining accuracy of the screw roller. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. 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 upper structure of the overall working assembly of the present invention; Figure 2 This is a schematic diagram of the lower structure of the overall working assembly of the present invention; Figure 3 This is a schematic diagram of the upper structure of the working roll drive mounting of the present invention; Figure 4 This is a schematic diagram of the lower structure of the working roll drive mounting of the present invention; Figure 5 This is a schematic diagram of the working and mounting structure of the synchronous gear holder and synchronous gear of the present invention; Figure 6 This is a three-dimensional structural diagram of the positioning mechanism of the present invention during operation. Figure 7 This is a schematic diagram of the guide tube seat drive installation structure of the present invention; Figure 8 This is a three-dimensional structural diagram of the positioning support of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Mounting support; 2. Servo drive seat; 3. Working roll; 4. Pressure guide drive cylinder; 5. Drive connecting seat; 6. Drive connecting arm; 7. Drive docking seat; 8. Synchronous gear seat; 9. Synchronous gear; 10. Sliding rail seat; 11. Groove rail support; 12. Drive support; 13. Support beam seat; 14. Guide end column; 15. Positioning guide column; 16. Positioning support; 17. Telescopic drive cylinder; 18. Guide cylinder seat; 19. Mounting cylinder seat; 20. Mounting block; 21. Guide sleeve; 22. Support shaft seat; 23. Fastening bolt. 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] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0023] Example Please see Figure 1-8 This invention provides a technical solution: a reverse planetary roller screw pair roller rolling device, comprising a rolling structure for screw roller processing, a transmission mechanism, and a positioning mechanism, specifically: The rolling structure is used for rolling the lead screw rollers. The rolling structure includes a mounting support 1, a servo drive base 2, work rolls 3, and a pressure-guided drive cylinder 4. The work rolls 3 are arranged in pairs. The two sets of work rolls 3 are supported by the servo drive base 2 and driven by the pressure-guided drive cylinder 4, and are movably mounted in a left-right opposing position in the middle of the mounting support 1. See attached figure for details. Figure 3 As shown, the working roll 3 is made of cemented carbide. The working roll 3 is rotatably mounted on the center of the servo drive base 2 via a rotating shaft. The end of the servo drive base 2 integrates a servo electric drive structure. The rotating shaft end of the working roll 3 is connected to the drive output end on the end of the servo drive base 2 for transmission, enabling precise and stable rotation drive of the working roll 3. (See attached diagram.) Figure 1 As shown, two sets of servo drive mounts 2 are mounted facing each other on the middle of the mounting bracket 1. To facilitate the connection and installation of the servo drive mounts 2, rectangular through slots are provided in the middle of both sides of the mounting bracket 1. The end seats of the servo drive mounts 2 are slidably supported and installed in the rectangular through slots. Specifically, see attached figure. Figure 5 As shown, to improve the stability of the sliding support, sliding rail seats 10 are bolted to the upper and lower edges of the rectangular through slot. For easy connection and installation with the sliding rail seats 10, see attached... Figure 4 As shown, slotted rail supports 11 are fixedly installed on both the upper and lower sides of the end seat of the servo drive base 2. A sliding guide groove is provided in the middle of the slotted rail support 11. After installation, the sliding rail base 10 and the sliding guide groove are slidably engaged and supported.

[0024] The transmission mechanism is used for the working transmission between the pressure-guided drive cylinder 4 and the servo drive base 2. The transmission mechanism includes a drive connecting seat 5, a drive connecting arm 6, a drive docking seat 7, a synchronous gear seat 8, and a synchronous gear 9. The cylinder rod end of the pressure-guided drive cylinder 4 is connected to the servo drive base 2 through the drive connecting seat 5, the drive connecting arm 6, and the drive docking seat 7. Specifically, see the attached diagram. Figure 2As shown, the pressure-guided drive cylinder 4 can be a high-thrust servo electric cylinder. To facilitate the installation and support of the pressure-guided drive cylinder 4, drive supports 12 are fixedly installed on both sides of the middle part of the mounting bracket 1 by bolts. The pressure-guided drive cylinder 4 is horizontally fixed to the inner middle part of the drive support 12 by bolts, as shown in the attached figure. Figure 3 As shown, the middle part of the drive connecting seat 5 is hinged and supported to the cylinder rod end of the pressure-guided drive cylinder 4. The drive connecting arms 6 are arranged in pairs, and the outer ends of the two sets of drive connecting arms 6 are fixed to the upper and lower ends of the drive connecting seat 5 respectively by bolts. The drive docking seat 7 is fixed to the outer end of the servo drive seat 2 by bolts, and the inner end of the drive connecting arm 6 is hinged to the middle part of the drive docking seat 7. The rolling working structure adopts a double-sided symmetrical force-applying structure. The two sets of working rolls 3 are driven and supported by the servo drive seat 2 and are installed in the middle of the mounting support 1 in an opposing position. The servo drive seat 2 is driven by the pressure-guided drive cylinder 4 for lateral translation. The servo drive seat 2 is driven by the drive connecting arms 6 and the drive docking seat 7 for torque transmission. The structure is simple and the transmission is reliable. During operation, the pressure can be applied simultaneously on both sides of the ball screw roller. During the processing, the ball screw roller is subjected to balanced force, which is beneficial to improving the machining accuracy of the ball screw.

[0025] As attached Figure 4 As shown, the synchronizing gear seat 8 is installed on the lower part of the drive docking seat 7. Specifically, the synchronizing gear seats 8 are arranged in pairs, and one end of the synchronizing gear seat 8 is fixedly installed to the lower part of the drive docking seat 7 by bolts. In order to improve the stability of the moving support of the synchronizing gear seat 8, as shown in the attached figure... Figure 5 As shown, a guide post 14 is fixedly installed at the other end of the synchronous gear seat 8. The end of the guide post 14 is movably inserted into the guide insertion hole provided at the lower part of the drive docking seat 7. The synchronous gear 9 is fixedly and rotatably installed in the middle of the mounting support 1. Specifically, in order to facilitate the installation and support of the synchronous gear 9, a support beam seat 13 is horizontally fixedly installed on the lower side of the middle of the mounting support 1. The synchronous gear 9 is fixedly and rotatably installed on the upper middle part of the support beam seat 13 through a rotating shaft. In order to realize the transmission connection, a meshing tooth groove is provided on the inner side of the synchronous gear seat 8. The two sets of synchronous gear seats 8 are centrally symmetrically meshed and installed on both sides of the synchronous gear 9. During operation, the synchronous displacement correction of the dual-sided servo drive seat 2 can be realized through the meshing transmission of the synchronous gear seat 8 and the synchronous gear 9, avoiding the imbalance of forces on both sides caused by abnormal differential of the pressure guide drive cylinder 4, which is conducive to improving the reliability of the device and the processing accuracy.

[0026] The positioning mechanism is used for guiding and positioning the lead screw roller. The positioning mechanism includes a positioning guide post 15, a positioning support 16, a telescopic drive cylinder 17, and a guide cylinder seat 18. The guide cylinder seat 18 is horizontally and movably mounted on the side of the mounting support 1 via the telescopic drive cylinder 17, serving as a positioning and guiding support for the central shaft of the lead screw roller. Specifically, see attached... Figure 6As shown, the telescopic drive cylinder 17 is an electric cylinder. The telescopic drive cylinders 17 are arranged in pairs, with two sets of telescopic drive cylinders 17 fixedly installed on both sides of the middle of the mounting bracket 1 by bolts, as shown in the attached diagram. Figure 7 As shown, in order to facilitate the support and installation of the guide cylinder seat 18, a mounting block 20 is fixedly installed at the cylinder rod end of the telescopic drive cylinder 17. The upper part of the guide cylinder seat 18 is fixedly installed to the lower part of the mounting block 20 by bolts. After installation, the middle part of the screw roller is slidably inserted into the guide through hole in the middle of the guide cylinder seat 18. During operation, the telescopic drive cylinder 17 can be flexibly adjusted to achieve flexible adjustment of the support position of the telescopic drive cylinder 17 by telescopic drive, and flexibly complete the guide positioning support of the middle part of the screw roller.

[0027] The positioning support 16 is horizontally and movably mounted on the side of the mounting support 1 via the positioning guide post 15, and is used for positioning and guiding support of the end shaft of the lead screw roller. Specifically, see attached... Figure 6 As shown, four positioning guide posts 15 are provided. To facilitate the installation and support of the positioning guide posts 15, an installation cylinder seat 19 is fixedly installed in the middle of the installation support 1. The positioning guide posts 15 are fixedly installed to the middle of the installation cylinder seat 19 by bolts. The positioning guide posts 15 are supported and fixedly installed through the middle of the installation support 1 by the installation cylinder seat 19. The positioning supports 16 are provided in pairs, as shown in the attached figure. Figure 8 As shown, to facilitate connection and installation with the mounting base 19, a guide sleeve 21 is fixedly installed at the end of the bracket of the positioning support 16. The guide sleeve 21 is slidably connected to the positioning guide post 15. To facilitate docking and installation with the end shaft of the lead screw roller, a support shaft seat 22 is rotatably installed in the middle of the positioning support 16 via a bearing. A fastening bolt 23 is provided on the side of the support shaft seat 22. The fastening bolt 23 is threadedly connected to the screw hole on the side of the support shaft seat 22. After installation, the end shaft of the lead screw roller is fixedly inserted into the positioning shaft hole in the middle of the support shaft seat 22 by the fastening bolt 23. The machining positioning auxiliary structure adopts a central shaft guide support type. During operation, with the cooperation of the positioning support 16 and the guide sleeve seat 18, the end shaft of the lead screw roller and the central guide positioning support can be realized. This ensures that the lead screw roller is always in the coaxial machining position during the machining process, which greatly improves the machining positioning accuracy and positioning support stability of the device and is conducive to improving the machining accuracy of the lead screw roller.

[0028] This invention also discloses a working method for a reverse planetary roller screw pair roller rolling device, specifically including the following steps: S1. Workpiece loading and installation: Adjust the position of the positioning support 16 by sliding according to the length of the lead screw roller. Insert one end of the pre-treated lead screw roller into the middle of the guide cylinder seat 18 on the material side. Then, insert the other end of the lead screw roller into the middle shaft hole of the support shaft seat 22 in the middle of the positioning support 16 from the inside. Tighten the fastening bolt 23 to connect and limit the end shaft of the lead screw roller, and complete the workpiece loading and installation. S2. Initial Rolling: Set the processing parameters and complete the reset calibration of the work rolls 3. Slowly feed the end of the screw roller into the space between the two sets of work rolls 3 by horizontal pushing. After completing the processing positioning calibration, the two sets of work rolls 3 are driven by the pressure guide cylinder 4 to synchronously approach the screw roller and clamp and support the shaft surface to be processed. Then, the two sets of work rolls 3 are driven by the servo drive seat 2 to rotate in opposite directions. The rolling processing of the screw roller shaft surface is completed with the pressure provided by the pressure guide cylinder 4. During the process, the synchronous displacement correction of the double servo drive seats 2 can be realized through the meshing transmission of the synchronous gear seat 8 and the synchronous gear 9, avoiding the imbalance of force on both sides caused by abnormal differential of the pressure guide cylinder 4. When the screw roller performs axial feed movement, the positioning support 16 and the guide cylinder seat 18 can be used to realize the guide positioning support of the screw roller end shaft and the middle part, which can ensure that the screw roller is always in the coaxial processing position during the processing. S3, Secondary Rolling: After the end of the lead screw roller passes through the guide cylinder seat 18 on the other side, the positioning support 16 on the free side is pushed and the end shaft of the lead screw roller is inserted and connected to the support shaft seat 22 in the middle of the positioning support 16. The end shaft of the lead screw roller after insertion and installation is limited by the fastening bolt 23. The rolling process of the remaining shaft surface is completed. Then the working roll 3 works in reverse. The lead screw roller is fed in reverse by the auxiliary positioning support of the double positioning supports 16 and the guide cylinder seat 18. The secondary rolling process of the lead screw roller is completed by the working roll 3. S4. Processing and unloading: After rolling, the two sets of working rolls 3 are driven outward by the pressure guide cylinder 4 and exit the rolling area. Then, the fastening bolts 23 in the middle of the support shaft seats 22 on both sides are loosened in sequence. Then, the positioning support 16 on the discharge side is pushed outward to leave enough space for the disassembly of the screw roller. Then, the screw roller is taken out by lateral pulling to complete the unloading of the screw roller.

[0029] In summary, this rolling device adopts a double-sided symmetrical force-applying rolling working structure. Two sets of working rolls 3 are driven and supported by servo drive seats 2 and are installed in the middle of the mounting support 1 in an opposing manner. The servo drive seats 2 are driven by the pressure guide drive cylinder 4 for lateral translation. The structure is simple and the operation is reliable. During operation, pressure guide can be applied synchronously on both sides of the lead screw roller. During the processing, the lead screw roller is subjected to balanced force, which is beneficial to improving the machining accuracy of the roller lead screw. The servo drive seats 2 are driven by the drive connecting arm 6 and the drive docking seat 7 for torque transmission. The structure is simple and the transmission is reliable. Furthermore, synchronous gear seats 8 are provided on the lower side of the two sets of drive docking seats 7. The two sets of synchronous gear seats 8 are centrally symmetrically distributed and mesh with the synchronous gear 9 provided in the middle of the support beam seat 13 for transmission. During operation, the synchronous gear seats 8 and the synchronous gear 9 are connected through the synchronous gear 9. The meshing transmission of gear 9 enables synchronous displacement correction of the dual-sided servo drive seats 2, avoiding the imbalance of forces on both sides caused by abnormal differential motion of the pressure-guided drive cylinder 4. This is beneficial to improving the reliability and machining accuracy of the device. The machining positioning auxiliary structure adopts a central shaft guide support type. Positioning supports 16 are installed on the front and rear feed sides of the mounting support 1 through positioning guide pillars 15. A guide cylinder seat 18 is installed in the middle of the outer side of the mounting support 1 through a telescopic drive cylinder 17. During operation, with the cooperation of positioning supports 16 and guide cylinder seat 18, the guide positioning support of the end shaft of the screw roller and the middle part can be realized. This ensures that the screw roller is always in the coaxial machining position during the machining process, which greatly improves the machining positioning accuracy and positioning support stability of the device, and is beneficial to improving the machining accuracy of the screw roller.

[0030] Those skilled in the art will understand that the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A reverse planetary roller screw pair roller rolling apparatus, comprising a rolling structure for machining the screw rollers, a transmission mechanism, and a positioning mechanism, characterized in that: The rolling structure is used for rolling the lead screw roller. The rolling structure includes a mounting support (1), a servo drive seat (2), working rolls (3), and a pressure-guided drive cylinder (4). The working rolls (3) are arranged in pairs. The two sets of working rolls (3) are supported by the servo drive seat (2) and are installed on both sides of the middle part of the mounting support (1) in a left-right opposing position. The servo drive seat (2) is driven to move horizontally in the middle part of the mounting support (1) by the pressure-guided drive cylinder (4). The transmission mechanism is set on both sides of the middle part of the mounting support (1) for working transmission between the pressure driving cylinder (4) and the servo drive seat (2). The positioning mechanism is used for guiding and positioning support of the lead screw roller. The positioning mechanism includes a positioning guide post (15), a positioning support (16), a telescopic driving cylinder (17) and a guide cylinder seat (18). The positioning support (16) is guided and supported to be horizontally and movably installed on the side of the mounting support (1) by the positioning guide post (15). The guide cylinder seat (18) is driven to be horizontally and movably installed on the side of the mounting support (1) by the telescopic driving cylinder (17).

2. The reverse planetary roller screw pair roller rolling device according to claim 1, characterized in that, The working roller (3) is rotatably mounted on the middle part of the servo drive base (2) by means of a rotating shaft. The rotating shaft end of the working roller (3) is connected to the drive output end on the end seat side of the servo drive base (2) for transmission.

3. The reverse planetary roller screw pair roller rolling device according to claim 2, characterized in that, Two sets of servo drive seats (2) are installed in the middle of the mounting support (1) in a left-right facing position. A rectangular through groove is opened in the middle of both sides of the mounting support (1). The end seat of the servo drive seat (2) is slidably supported and installed with the rectangular through groove. The upper and lower sides of the rectangular through groove are fixedly installed with sliding rail seats (10) by bolts. The upper and lower sides of the end seat of the servo drive seat (2) are fixedly installed with groove rail supports (11). A sliding guide groove is provided in the middle of the groove rail support (11). After installation, the sliding rail seat (10) and the sliding guide groove are slidably fitted and supported.

4. The reverse planetary roller screw pair roller rolling device according to claim 3, characterized in that, The transmission mechanism includes a drive connecting seat (5), a drive connecting arm (6), a drive docking seat (7), a synchronous gear seat (8), and a synchronous gear (9). The cylinder rod end of the pressure-guiding drive cylinder (4) is connected to the servo drive seat (2) through the drive connecting seat (5), the drive connecting arm (6), and the drive docking seat (7). The synchronous gear seat (8) is installed on the lower part of the drive docking seat (7) on the lower side. The synchronous gear seats (8) are arranged in pairs. The synchronous gear (9) is fixedly and rotatably installed on the middle part of the mounting support (1). The two sets of synchronous gear seats (8) are centrally symmetrical and meshed on both sides of the synchronous gear (9).

5. The reverse planetary roller screw pair roller rolling device according to claim 4, characterized in that, Both sides of the middle part of the mounting bracket (1) are fixedly mounted with drive brackets (12) by bolts. The pressure guiding drive cylinder (4) is fixedly mounted horizontally on the inner middle part of the drive bracket (12) by bolts. The middle part of the drive connecting seat (5) is hinged to the cylinder rod end of the pressure guiding drive cylinder (4). The drive connecting arms (6) are set in pairs. The outer ends of the two sets of drive connecting arms (6) are fixedly mounted to the upper and lower ends of the drive connecting seat (5) by bolts. The drive docking seat (7) is fixedly mounted to the outer end of the servo drive seat (2) by bolts. The inner end of the drive connecting arm (6) is hinged to the middle part of the drive docking seat (7).

6. The reverse planetary roller screw pair roller rolling device according to claim 5, characterized in that, A support beam seat (13) is horizontally fixedly installed on the lower middle part of the mounting bracket (1). The synchronous gear (9) is rotatably installed on the upper middle part of the support beam seat (13) by a rotating shaft. One end of the synchronous gear seat (8) is fixedly installed to the lower part of the drive docking seat (7) by bolts. The other end of the synchronous gear seat (8) is fixedly installed with a guide end post (14). The end of the guide end post (14) is movably inserted into the guide insertion hole provided at the lower part of the drive docking seat (7). The inner side of the synchronous gear seat (8) is provided with a meshing tooth groove. The inner side of the synchronous gear seat (8) is meshed with the edge of the synchronous gear (9) through the meshing tooth groove for transmission.

7. The reverse planetary roller screw pair roller rolling device according to claim 1, characterized in that, The telescopic drive cylinders (17) are arranged in pairs. The two sets of telescopic drive cylinders (17) are fixedly installed on the middle two sides of the mounting support (1) by bolts. The cylinder rod end of the telescopic drive cylinder (17) is fixedly installed with the mounting block (20). The upper part of the guide cylinder seat (18) is fixedly installed with the lower part of the mounting block (20) by bolts. After installation, the middle part of the screw roller is slidably inserted into the guide through hole in the middle of the guide cylinder seat (18).

8. A reverse planetary roller screw pair roller rolling device according to claim 7, characterized in that, Multiple positioning guide posts (15) are provided. An installation cylinder seat (19) is fixedly installed in the middle of the installation support (1). The positioning guide post (15) is supported and fixedly installed through the installation cylinder seat (19) in the middle of the installation support (1).

9. A reverse planetary roller screw pair roller rolling device according to claim 8, characterized in that, The positioning supports (16) are arranged in pairs. A guide sleeve (21) is fixedly provided at the end of the support of the positioning support (16). The guide sleeve (21) is slidably connected to the positioning guide post (15). A support shaft seat (22) is rotatably installed in the middle of the positioning support (16) through a bearing. A fastening bolt (23) is provided on the side of the support shaft seat (22). After installation, the end shaft of the screw roller is limited by the fastening bolt (23) and fixedly inserted into the positioning shaft hole in the middle of the support shaft seat (22).

10. The working method of the reverse planetary roller screw pair roller rolling device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Workpiece loading and installation: Adjust the position of the positioning support (16) by sliding according to the length of the lead screw roller. Insert one end of the pre-treated lead screw roller into the middle of the guide cylinder seat (18) on the material side. Then insert the other end of the shaft into the middle shaft hole of the support shaft seat (22) in the middle of the positioning support (16) from the inside. Tighten the fastening bolt (23) to connect and limit the end shaft of the lead screw roller, and complete the workpiece loading and installation. S2, Initial Rolling: Set the processing parameters and complete the reset calibration of the work rolls (3). Slowly feed the end of the lead screw roller into the space between the two sets of work rolls (3) by horizontal pushing. After completing the processing positioning calibration, the two sets of work rolls (3) are driven by the pressure guide cylinder (4) to synchronously approach the lead screw roller and clamp and support the shaft surface to be processed. Then, the two sets of work rolls (3) are driven by the servo drive seat (2) to rotate in opposite directions. The pressure provided by the pressure guide cylinder (4) completes the rolling process. During the rolling process of the screw roller shaft side, the synchronous displacement correction of the double-sided servo drive seat (2) can be achieved through the meshing transmission of the synchronous gear seat (8) and the synchronous gear (9), avoiding the imbalance of force on both sides caused by the abnormal differential of the guide pressure drive cylinder (4). When the screw roller performs axial feed motion, the guide support of the end shaft of the screw roller and the middle part can be achieved by the cooperation of the positioning support (16) and the guide cylinder seat (18), which can ensure that the screw roller is always in the coaxial processing position during the processing. S3, Secondary rolling: After the end of the screw roller is fed through the guide cylinder seat (18) on the other side, the positioning support (16) on the free side is pushed and the end shaft of the screw roller is inserted and connected to the support shaft seat (22) in the middle of the positioning support (16). The end shaft of the screw roller after insertion and installation is limited by the fastening bolt (23). The remaining shaft surface is rolled to complete the rolling process. Then the working roll (3) works in the opposite direction. The screw roller is fed in the opposite direction by the auxiliary positioning support of the double positioning support (16) and the guide cylinder seat (18). The secondary rolling process of the screw roller is completed by the working roll (3). S4. Processing and unloading: After rolling, the two sets of working rolls (3) are driven outward by the pressure-guided drive cylinder (4) and exit the rolling area. Then, the fastening bolts (23) in the middle of the two side support shaft seats (22) are loosened in sequence. Then, the positioning support (16) on the discharge side is pushed outward to leave enough space for the disassembly of the screw roller. Then, the screw roller is taken out by lateral pulling to complete the unloading of the screw roller.

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