311 results about "Roller screw" patented technology

The invention discloses a reverse type annular tooth groove planetary roller screw which comprises a nut, a screw rod, a plurality of rollers and a retainer, a multi-head internal thread is arranged in the nut, the rollers and the screw rod are both of an annular tooth groove structure without a helix angle, and the annular tooth grooves of the rollers are meshed with the internal thread of the nut and the annular tooth grooves of the screw rod respectively; first gears are machined at the two ends of the annular tooth groove of the lead screw, second gears are machined at the two ends of the annular tooth groove of the roller, and the first gears are meshed with the multiple second gears at the same time. The retainer is of an integral flexible retainer structure, and the pin rollers have the self-adaptive capacity in multiple directions in the circumferential direction and the radial direction through the retainer. And an arc-shaped roller path is designed on the screw rod and is matched with the ball spline housing to play a linear rolling guiding and rotation stopping role on the screw rod. The reverse lead screw has the advantages of being large in transmission ratio, compact in structure, easy to machine and assemble, low in cost, good in self-adaptive performance, high in positioning precision, good in reliability and the like.

The invention discloses a roller screw external thread grinding force measuring method. The method comprises the steps that a to-be-measured screw is installed on an external thread grinding machine tool in the mode that the to-be-measured screw is clamped by tips at the two ends of the machine tool; the two mechanical sensors are installed at the center position right facing the lead screw to be measured and face the normal grinding force direction and the tangential grinding force direction respectively; a to-be-measured lead screw clamped by double tips is regarded as a simply supported beam structure of which one end is fixed and hinged and the other end is movable and hinged, a mechanical sensor is regarded as an elastic support, a mechanical model is established, and the relationship among the measurement result of the mechanical sensor, an actual method and tangential grinding force at different grinding positions is obtained; and according to the measurement result of the mechanical sensor, the actual method and the tangential grinding force are obtained by utilizing the relation between the measurement result of the mechanical sensor at different grinding positions and the actual method and the tangential grinding force, and the actual grinding force is obtained after vector superposition. The device has the characteristics of clear and definite measurement principle, accurate and reliable measurement result, simple structure and convenience in assembly.

The invention relates to a special machining device for a reverse nut of a planetary roller screw, which is characterized by comprising a workbench, and a workpiece clamping center, a grinding unit and a turning unit which are arranged on the workbench, a grinding wheel dressing unit is arranged on one side of the workpiece clamping center, a workpiece is clamped on a workpiece clamp assembly in advance, and the grinding wheel dressing unit is arranged on the other side of the workpiece clamping center. Then an electric tool turret of a turning unit is made to be coaxial with the workpiece, the electric tool turret firstly turns an inner hole of the reverse nut semi-finished product, then a grinding component is adjusted to be coaxial with the turned reverse nut semi-finished product, a grinding electric spindle is driven, the grinding component grinds the inner hole of the reverse nut semi-finished product, and the inner hole of the reverse nut semi-finished product is ground. And finally, the dressing motorized spindle is driven, and the dressing grinding wheel is used for dressing the grinding component. According to the turning and grinding integrated technology, the reverse nut is machined in the mode that turning is conducted firstly and then grinding is conducted, the machining efficiency is high, and the production cost is greatly reduced.

The invention discloses an electrically-driven mechanical tread brake unit which comprises an electric brake cylinder, a hoisting arm, a brake-shoe hoist, a brake-shoe holder and a brake-shoe, the electric brake cylinder is provided with a motor located in a shell, and further provided with a planetary gear assembly connected with an output shaft of the motor and a planetary roller screw rod driven by the planetary gear assembly; the planetary gear assembly comprises a sun gear coaxially connected with an output shaft of the motor, an inner gear ring fixed to the shell, a planet gear meshed between the sun gear and the inner gear ring in a tooth meshing mode and a planet carrier connected with the planet gear, the planet roller lead screw comprises a lead screw shaft, a roller and a nut, and the planet carrier is provided with an outer gear ring. A transmission gear is fixed to a nut of the planetary roller lead screw, and an outer gear ring on the planet carrier is meshed with the transmission gear. The planetary gear and the planetary roller lead screw are arranged to replace a traditional force amplification mechanism, low-power output and large torque are achieved, and meanwhile the functions of manually resetting the lead screw and preventing the lead screw from being stuck in the fault state can be achieved.

The invention relates to a multistage planetary roller lead screw pair structure, and belongs to the technical field of electromechanical servo transmission. The linear actuator comprises a first-stage lead screw, a first-stage pin roller, a first-stage nut, an angular contact bearing II, a first-stage actuator cylinder, a second-stage lead screw, a second-stage pin roller, a second-stage nut, a shell and an adapter shaft. Therefore, a nested structure of the first-stage planetary roller screw pair and the second-stage planetary roller screw pair is formed. The large working stroke can be provided within the small retraction size, and the large bearing capacity can be provided through the small radial size; meanwhile, the linear motion speed ratio of different graded lead screw pairs is controlled by adjusting the thread lead of the first-stage lead screw and the second-stage lead screw, accurate control over the motion speed of the tail end effective load is achieved, a guide structure within the stroke range is designed for each stage of nut, and high stability of the tail end output load of the structure can be achieved.

The utility model relates to the technical field of planetary roller screws, in particular to a gearless planetary roller screw, which comprises a nut, a screw and a plurality of rollers. Assembling sections are arranged on the pin rollers; when the lead screw is a driving part, one of the assembling section and the nut is provided with annular teeth, the other one of the assembling section and the nut is provided with an annular groove, and the annular groove is matched with the annular teeth in a meshed mode so that no relative axial displacement exists between the pin rollers and the nut. When the nut is a driving part, one of the assembling section and the lead screw is provided with annular teeth, the other one of the assembling section and the lead screw is provided with annular grooves, and the annular grooves are matched with the annular teeth in a meshed mode so that no relative axial displacement exists between the pin rollers and the lead screw. Aiming at the defects of the existing planetary roller screw, a gear structure is eliminated, burrs generated by gear machining are eliminated, the cleanliness level of the roller is improved, the influence of the burrs on thread meshing is reduced, and the overall service life of the planetary roller screw is prolonged; impact and noise caused by gear meshing are avoided, and the overall NVH level of the planetary roller screw is improved.

A planetary roller screw adapted for solving insufficient structural strength of the conventional planetary roller screw while proceeding with precise motion control is disclosed. The planetary roller screw includes a main screw having an external thread, a nut having an internal thread, and a planetary assembly having rollers. Each roller includes an outer periphery having an external thread. The pitches of the external thread of the main screw, the internal thread of the nut, and the external thread of each roller are identical. The helix direction of the external thread of the main screw is opposite to that of the internal thread of the nut. When one of the main screw, the nut, and the planetary assembly acting as a driving member rotates, a linear displacement direction of the planetary assembly relative to the nut is opposite to that of the main screw relative to the planetary assembly.

The invention relates to a reverse toothless planetary roller screw, and belongs to the technical field of roller screws, the reverse toothless planetary roller screw comprises a screw rod, a long nut, a planet carrier assembly and a plurality of rollers, and the periphery of the screw rod is sequentially provided with a front shaft section, an external thread section and a rear shaft section; internal threads are arranged on the inner wall of the nut; each roller comprises a threaded part in the middle and polished shaft parts at the two ends; the thread part of the roller and the external thread section of the lead screw are opposite in rotation direction and equal in lead angle; the planet carrier assembly comprises a middle retainer, and the middle retainer is provided with at least three open grooves used for assembling the pin rollers in the radial direction. By canceling a screw rod gear / ring groove and pin roller gear / ring groove structure and combining a double matching mechanism of the planet carrier assembly, the machining bottleneck of a composite structure is thoroughly eliminated, the axial parallelism and the constant lead characteristic of the pin rollers are guaranteed, meanwhile, vibration noise is remarkably reduced, and high-precision and large-scale mass production is achieved.

Provided are a micro-lead differential-type planetary roller screw and an electric cylinder. A part of an area in a screw (1) engaged with a first roller threaded zone (201) has the same pitch, the same spiral lifting angle, and opposite spiral direction as the first roller threaded zone (201); alternatively, a part of an area in an outer sleeve (g) engaged with a second roller thread zone (b01) has the same pitch, the same spiral lifting angle, and opposite spiral direction as the second roller thread zone (b01). Thus, a constant output lead that is much smaller than the screw thread lead is achieved, expanding the application range of micro-lead differential planetary roller screws to the micro-lead field.

The invention discloses a roller screw milling forming device with an anti-deviation function, and relates to the technical field of milling machine tools, the milling device comprises a seating machine tool body, a sliding rail is arranged on the seating machine tool body, a machining table is slidably connected to the sliding rail, a milling main body is arranged in the machining table, an auxiliary closing frame is slidably connected to the seating machine tool body, and the auxiliary closing frame is slidably connected to the machining table. The auxiliary closing frame is fixedly connected with the machining table, a deviation rectifying frame and an adjusting frame are arranged on the auxiliary closing frame, the adjusting frame is slidably connected with the seating bed body and comprises an adjusting steering engine and an adjusting wedge column arranged on the adjusting steering engine, a compensation closing table is slidably connected into the auxiliary closing frame, and a compensation wedge column is arranged on the compensation closing table. And a speed measuring sensor corresponding to the speed measuring wheel is arranged in the auxiliary closing frame, the speed measuring sensor is electrically connected with the adjusting steering engine, and the functions of automatic correction machining of the lead screw and fine adjustment of the milling cutter are achieved.

The invention belongs to the technical field of detection devices, particularly relates to a detection device based on distribution uniformity of rollers of a planetary roller screw, and provides the following scheme: the detection device comprises a base; a rotary driving module, an optical detection module, a contact stress detection module, a high-precision capacitive displacement sensor array mechanism and a mobile detection mechanism are sequentially arranged at the top of the base, the rotary driving module comprises a servo motor, an encoder and an air bearing, and the servo motor is fixedly connected with a coupler; and the coupler is in transmission connection with the planetary roller screw. The three-dimensional scanning assembly reconstructs the surface appearance of the roller through the line laser transmitter and the area-array camera, the thin film pressure sensor is embedded into a nut raceway to collect contact pressure, the strain gauge array is pasted to a lead screw shaft neck to monitor deformation, and the multiple sensors work cooperatively to comprehensively evaluate the distribution state of the roller from the dimensions of optical tracks, mechanical response and the like. And the one-sidedness problem of a traditional single detection means is solved.

This utility model relates to the field of wood processing and discloses a high-efficiency wood surface treatment roller, including an operating table. A positioning component is provided at the front of the operating table, and a mounting frame is fixedly connected to the top surface of the operating table. Two electric rods are fixedly connected to the upper part of the mounting frame, and a sanding component is provided at the lower part of the mounting frame. An installation opening is provided in the middle of the operating table, and an auxiliary roller is rotatably connected to the center of the installation opening. The positioning component includes a housing, with a control rod rotatably connected through the center of the housing. Sliding blocks are slidably connected to the left and right sides inside the housing, and the control rod and the sliding blocks are threaded together. In this utility model, by setting up the cooperation between components such as the housing, control rod, sliding blocks, mounting frame, support, roller screw, and limiting rod, the device can restrict the wood more stably and prevent tilting, making it more practical.

The application relates to the field of high-precision transmission technology, and particularly discloses a retainer and a circulating planetary roller screw pair. The retainer comprises a circular ring body, a plurality of roller guide grooves are arranged on the circular ring body and are uniformly distributed in the circumferential direction, the roller guide grooves extend along the radial direction of the circular ring body, an opening penetrating through an inner hole of the circular ring body is arranged at the radial inner end of the roller guide groove, the two sides of the opening are inwardly contracted to form a contraction opening, and the contraction opening is elastic. In the above structure, the retainer is circular ring-shaped and is arranged on the side surface of the inner threaded section of the nut, so that the overall radial size of the circulating planetary roller screw pair can be reduced, and a reliable structural basis is provided for realizing the miniaturization and micro-miniaturization of the circulating planetary roller screw pair; the roller guide groove is provided with the opening, the radial size of the retainer can be made smaller, and the overall radial size of the circulating planetary roller screw pair is smaller.

The invention relates to a standard toothless planetary roller screw, and belongs to the technical field of roller screws, the standard toothless planetary roller screw comprises a screw rod, a nut, a planet carrier assembly and a plurality of rollers, and the periphery of the screw rod is provided with external threads; internal threads are arranged on the inner wall of the nut, and unthreaded hole parts are arranged at the two ends of the internal threads; each roller comprises a threaded part in the middle and polished shaft parts at the two ends; the thread part of the roller and the internal thread of the nut have the same screwing direction and the same lead angle; the planet carrier assembly comprises a middle retainer, and the middle retainer is provided with at least three open grooves used for assembling the pin rollers in the radial direction. By canceling nut gear ring / ring groove and pin roller gear / ring groove structures and combining a double matching mechanism of the planet carrier assembly, the machining bottleneck of a composite structure is thoroughly eliminated, the axial parallelism and the constant lead characteristic of the pin rollers are guaranteed, meanwhile, vibration noise is remarkably reduced, and high-precision and large-scale mass production is achieved.

The utility model discloses a retainer of a planetary roller lead screw pair, which comprises a retainer body, the center of the retainer body is provided with a through accommodating cavity for a lead screw to pass through for installation, and the retainer is characterized in that the retainer body is made of a non-metal material with high strength, high rigidity and light weight, and a plurality of elastic buffer parts are arranged in the accommodating cavity at intervals in a protruding manner. The retainer has the advantages of low cost and light weight, and the operation stability and the service life of the planetary roller screw pair can be ensured when the retainer is applied to the corresponding planetary roller screw pair.

The invention relates to a nut structure in a planetary roller screw. A nut structure in a planetary roller screw device comprises a plurality of nuts which are coaxially arranged, the radiuses of the nuts are the same, a plurality of protrusions are arranged on the end face of one of the adjacent nuts, and a plurality of grooves matched with the protrusions are formed in the end face of the other nut. Adjacent nuts are welded after being positioned and connected through the matching structures of the grooves and the protrusions, the matching density of the protrusions and the grooves of the inner ring is high, and the matching density of the protrusions and the grooves of the outer ring is low. According to the nut structure in the planetary roller screw device, segmented manufacturing of a long nut can be met, the overall strength of the nut after segmented welding can be high, the anti-shearing capacity is close to that of base metal, stress concentration can be effectively eliminated, and stress distribution can be optimized; the technical problems that in a roller lead screw structure in the prior art, a long nut is inconvenient to manufacture, and the long nut subjected to segmented welding is unstable in performance, reduced in strength and concentrated in stress are solved.

The invention relates to the technical field of roller screws, in particular to a standard multi-section ring groove planetary roller screw which comprises a screw rod and a nut, the nut is arranged on the screw rod in a sleeving mode, and a plurality of meshing sections and transition sections located between the adjacent meshing sections are arranged on the inner side wall of the nut in the axial direction of the nut; the multiple pin rollers are installed on the inner side of the nut through a planet carrier and matched with the lead screw and the meshing section to achieve relative movement between the nut and the lead screw, the pin rollers are rotationally connected to the planet carrier, the multiple pin rollers are arranged on the inner side of the nut in the circumferential direction, and each pin roller is provided with a transmission section; wherein one transmission section is opposite to one meshing section, each meshing section comprises a plurality of first ring grooves formed in the axial direction of the nut at intervals, and each transmission section comprises a plurality of second ring grooves formed in the axial direction of the pin roller at intervals. Through the design of the roller and the ring groove in the nut and the arrangement of the transition section, low-cost mass production of the small-lead roller screw is achieved.

A linear actuator 1 and a manufacturing method for such a linear actuator 1 are provided. A roller screw nut 3, a roller screw shaft 4 and a plurality of planetary rollers 5 form an inverted roller sc

The application discloses a design method for a grinding wheel profile for planetary roller screw thread grinding, and belongs to the technical field of machining. Characteristics of the grinding wheel profile for planetary roller screw thread multi-head grinding are analyzed; a coordinate system of a workpiece, a grinding wheel and a grinding contact position is established; a workpiece thread profile model, a thread spiral curve model and a grinding plane model are constructed; workpiece thread coordinate points are selected, and the grinding wheel preliminary profile for the inner and outer thread multi-head grinding is solved by using the models; and the final profile of the grinding wheel is determined according to thread tooth characteristics and the dressing capacity of a diamond wheel. The application solves the design problem of the grinding wheel profile for planetary roller screw thread multi-head grinding, improves machining precision, and fills the blank of the normal profile design of the grinding wheel for inner thread multi-head grinding.

The planetary rolling thread transmission device comprises a threaded lead screw, a transmission assembly is arranged on the threaded lead screw, the transmission assembly comprises a first nut pair, the first nut pair is connected to the threaded lead screw in a sleeving mode, two inner gear rings are fixedly installed on the inner ring of the first nut pair, and rotating discs are rotationally arranged in the inner gear rings; a plurality of planetary gears are rotationally inserted into one side of the rotating disc and are in meshed connection with teeth of an inner ring of the inner gear ring, a threaded rod is integrally formed at one end of each planetary gear and is in threaded connection with the threaded lead screw, a liquid storage tank is fixedly mounted at the top of the first nut pair, lubricating oil is arranged in the liquid storage tank, and a spray head is arranged at the bottom of the liquid storage tank. According to the planetary rolling thread transmission device, by opening the spray head, lubricating oil in the liquid storage tank can fall on the thread lead screw through the spray head, the thread lead screw can be lubricated, friction loss can be effectively reduced, and therefore the service life of the planetary rolling thread transmission device can be prolonged.

The invention discloses an electromagnetic suspension based on a planetary roller screw and a permanent magnet fault-tolerant motor, and belongs to the technical field of vehicle suspensions and motor driving. The electromagnetic suspension comprises a permanent magnet fault-tolerant motor, a reverse planetary roller screw and a spring. The permanent magnet fault-tolerant motor serves as a driving source, a rotor of the permanent magnet fault-tolerant motor is integrated with the lead screw nut, the permanent magnet fault-tolerant motor rotates to enable the pin rollers to rotate and revolve around the lead screw at the same time, then the rotating motion is converted into linear motion of the lead screw, and therefore axial acting force is output. The spring is connected with the shell and the lower connector, mainly bears the static weight of the vehicle body and has a synergistic effect with the acting force output by the motor. The device is compact in structure, high in transmission efficiency, good in fault-tolerant operation capacity, good in reliability, high in road impact resistance and capable of effectively restraining vibration of a vehicle body.

The present application relates to a kind of new humanoid robot three degrees of freedom hip system, belong to intelligent robot field.The system includes femoral skeleton, main base, lateral roll joint module, yaw joint module, pitch base assembly, planetary roller screw assembly, main connecting rod and vice connecting rod.Pitch movement is realized through planetary roller screw assembly, lateral roll joint module realizes lateral roll movement, and yaw joint module realizes yaw movement.The present application solves the problems of low load capacity, heavy weight, large size, inconvenient assembly, unstable walking and other problems in the prior art by optimizing the structure design, and is suitable for various application scenarios such as industrial handling, rehabilitation training and the like.

This invention discloses a precision testing device for planetary roller screw pairs, including a testing platform with symmetrically mounted fixed plates on its top. A servo motor is fixedly mounted on one side of one of the fixed plates. The device also includes two sets of support rods symmetrically mounted below the two fixed plates, and a positioning assembly positioned between the two fixed plates. The positioning assembly includes two movable frames and limiting components symmetrically positioned on both sides of the two movable frames. This allows for easy switching between different sized positioning plates when dealing with different types of planetary roller screw pairs, facilitating reliable positioning of the nut or screw according to the type of planetary roller screw pair. Furthermore, after switching, when positioning a reverse planetary roller screw pair, multi-point positioning of the screw in the pair can be quickly achieved, facilitating the movement of the screw in the reverse planetary roller screw pair while preventing rotation during screw movement, thus improving testing accuracy.

A planetary roller screw arrangement is provided includes a threaded nut, a threaded spindle, and a plurality of threaded planets. The threaded nut has a first longitudinal length and a first threaded portion that spans a second longitudinal length. The threaded spindle has a second threaded portion that spans a third longitudinal length. The plurality of threaded planets are arranged radially between the threaded spindle and the threaded nut and have a third threaded portion configured to be threadedly engaged with the first threaded portion, the third threaded portion spanning a fourth longitudinal length. The fourth longitudinal length is greater than the third longitudinal length.

The invention belongs to the technical field of outer wall plastering, and discloses a handling frame for outer wall plastering, which comprises a handling frame, a roller lead screw structure and a winch mounted at the top of the handling frame, the winch lifts the roller lead screw structure, the roller lead screw structure is mounted on a sliding rail in a sliding manner, and the roller lead screw structure is mounted on the sliding rail in a sliding manner. The roller lead screw structure is provided with a plastering device through a transverse pushing mechanism and a fixing frame, and the roller lead screw structure is matched with the winch to drive the plastering device to move in the vertical plane. According to the plastering device, the protruding edges on the plastering device can be folded and unfolded on the surface of the plastering device, when the protruding edges extend out of the surface of the plastering device, mortar flowing down along the wall face and the surface of the plastering device can be plastered to the periphery to be attached to the wall face, and when the protruding edges are folded back into the plastering device and flush with the surface of the plastering device, the mortar can be plastered to be attached to the wall face. And the troweling device is used as a troweling plate for troweling the mortar conveyed to the wall surface. The device can be used for plastering on the wall and can also troweling the mortar while being used for plastering on the wall. And the automatic plastering operation is realized.

The invention discloses a planetary roller screw pair modification method based on tolerance zone relaxation, comprising: determining boundary conditions, design variables, objective functions and constraint conditions of roller thread tooth modification optimization, the design variables being thread tooth modification amounts, the objective functions comprising an objective function A and an objective function B, and the constraint conditions being constraint conditions; the target function A is used for guiding the maximum value of the single-thread tooth bearing capacity to decrease progressively, and the target function B is used for guiding a tolerance zone to widen and a tolerance zone widening value to increase progressively; initializing a population according to the design variables, performing evolution operation on the population, and searching an optimal solution under the guidance of the target function A and the target function B; and judging whether a stop condition is met or not, if not, continuing iteration, otherwise, terminating iteration and outputting an optimal solution. Therefore, the bearing performance of the planetary roller lead screw pair is improved, or the precision requirement of the planetary roller lead screw pair is reduced by widening the width of the key tolerance zone, and the machining feasibility is improved.

A double-helix planetary roller helical pressing device includes a first turntable 10 and a second turntable 20. A conical roller 30 is provided between the first turntable 10 and the second turntable 20. The first turntable has a first conical helical track 11, and the second turntable has a second conical helical track 21. The conical roller has a roller annular groove 31 that meshes with the first conical helical track 11 and the second conical helical track 21. The first turntable 10 and the second turntable 20 rotate coaxially relative to each other, and the conical roller 30 rolls on the first conical helical track 11 and the second conical helical track 21. This invention uses a first turntable with a first conical helical track and a second turntable with a second conical helical track. The conical roller is provided with annular teeth, which allows the conical roller to accurately maintain its radial position, uniformly bear the pressing load, and also avoids slippage between the conical roller and the first and second turntables, improving the operating effect. A roller retainer structure with a roller carriage is used, which can better constrain the posture of the roller during movement.

According to the micro-lead differential type planetary roller screw and the electric cylinder provided by the invention, the design that the partial area, meshed with the first roller thread area, in the screw is the same as the first roller thread area in thread pitch, the spiral lead angles are the same, and the spiral directions of the spiral lines are opposite is adopted; or due to the design that the partial area, meshed with the second pin roller thread area, in the outer sleeve is the same as the second pin roller thread area in thread pitch, the spiral lead angles are the same as the second pin roller thread area, and the spiral directions of the spiral lines are opposite, the constant output lead far smaller than the screw thread lead is functionally achieved; therefore, the application range of the micro-lead differential planetary roller screw is widened to the field of micro-lead.

The invention discloses a high-precision integrated planetary roller lead screw device, and belongs to the field of transmission mechanisms. A step cavity is formed in the main case; the motor stator is fixedly connected to the middle side wall of the step cavity; the right side wall of the step cavity is connected with a bearing outer ring; the bearing outer ring is in interference fit or transition fit connection with the right side wall of the step cavity; the outer side of the left side of the planetary roller screw rod inner gear ring shaft is rigidly connected with magnetic steel; an encoder is fixedly arranged on the left side wall of the step cavity; a lead screw through internal thread is arranged on the inner side of the planetary roller lead screw inner gear ring shaft, a lead screw is arranged in the step cavity and coincides with the axis of the step cavity, the left side of the lead screw is in interference connection with a roller retainer, the right end of the roller retainer is rotationally connected with a plurality of rollers, and the lead screw through internal thread is in threaded connection with the rollers. According to the planetary roller screw rod driving device, an original motor driving component and a planetary roller screw rod are integrated, and the size of the device is reduced.

Disclosed is a roller taper grinding method for a planetary roller screw mechanism. The method includes steps as follows: step 1: determining basic parameters and a bearing capacity of a planetary roller screw mechanism to be machined; step 2: establishing deformation and force balance equations of the planetary roller screw mechanism according to the basic parameters and the bearing capacity of the planetary roller screw mechanism determined in step 1; step 3: iteratively computing an optimal grinding taper angle of roller grinding according to the deformation and force balance equations established in step 2; step 4: determining process parameters of roller grinding; and step 5: grinding a roller taper of the planetary roller screw mechanism by a machine tool according to the process parameters determined in step 4.