Axial Feed Type Rolling Process Die and Method for Rollers in Planetary Roller Screw Pair

Abstract

The present invention discloses an axial feed type rolling processing die and method for rollers in a planetary roller screw pair. The processing die includes a rough machining roller and a finish machining roller. Rolling threads are provided on the outer circumferential surfaces of the rough machining roller and the finish machining roller. Thread tooth rolling forming sections A and B are respectively provided at both ends of the rolling threads. The thread tooth rolling forming sections A and B are both arranged along the circumferential direction. The helix directions of the rolling threads on the rough machining roller and the finish machining roller are opposite. In the processing method of the present invention, the hardness and strength of the surface layer metal of the workpiece are greatly enhanced and improved during the rolling process, and the mechanical properties are excellent. The processing procedure is simplified, the production efficiency is improved. During the manufacturing process, the surface layer metal structure of the workpiece is not cut off, no chips are generated, material waste is avoided, and the surface continuity of the workpiece after processing is good.

Description

Technical Field

[0001] The present invention relates to the technical field of roller machining in planetary roller screw pairs. Specifically, it is an axial feed type rolling die and method for rollers in planetary roller screw pairs. Background Art

[0002] A planetary roller screw pair is a high-precision transmission mechanism that can convert linear motion and rotational motion into each other, and is widely used in fields such as aerospace, weaponry, medical devices, and precision machine tools. A plurality of rollers are evenly distributed between the nut and the screw in the planetary roller screw pair, and numerous rollers bear the load simultaneously. The roller is a key part for transmitting load in the planetary roller screw pair, and its processing and manufacturing technology and quality affect the assembly and overall performance realization of the planetary roller screw pair.

[0003] Traditional cutting manufacturing methods have complex processing procedures, extremely low production efficiency, and poor mechanical properties. In the cold rolling process, the rolling die often bears a large forming force, the die wears quickly, and its life cannot be guaranteed, which limits the application of the plastic forming process in mass production of rollers. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide an axial feed type rolling die and method for rollers in a planetary roller screw pair that can reduce the die forming load, improve the performance of the rollers, and increase the manufacturing speed.

[0005] To solve the above technical problems, the present invention provides the following technical solution: An axial feed type rolling die for rollers in a planetary roller screw pair, including a rough machining roller and a finish machining roller. Rolling threads are provided on the outer circumferential surfaces of the rough machining roller and the finish machining roller. Thread tooth rolling forming sections A and B are respectively provided at both ends of the rolling thread. The thread tooth rolling forming sections A and B are both arranged along the circumferential direction, and the distribution angles of the thread tooth rolling forming sections A and B are both less than 360°; the helix directions of the rolling threads on the rough machining roller and the finish machining roller are opposite.

[0006] For the above axial feed type rolling die for rollers in a planetary roller screw pair, the thread tooth rolling forming section A is arranged at the starting position of the rolling thread; the thread tooth rolling forming section B is arranged at the end position of the rolling thread.

[0007] For the above axial feed type rolling die for rollers in a planetary roller screw pair, the thread tooth rolling forming sections A and B are symmetrically distributed; the thread tooth rolling forming sections A and B are parallel to each other.

[0008] In the above-mentioned axial feed type rolling die for the roller in the planetary roller screw pair, the major diameter of the thread tooth rolling forming section A is less than or equal to the major diameter of the rolled thread; the major diameter of the thread tooth rolling forming section B is less than or equal to the major diameter of the rolled thread.

[0009] In the above-mentioned axial feed type rolling die for the roller in the planetary roller screw pair, both the thread tooth rolling forming section A and the thread tooth rolling forming section B are composed of more than two tooth grooves. The tooth grooves are axially opened, and more than two tooth grooves are arranged at equal intervals in the circumferential direction.

[0010] In the above-mentioned axial feed type rolling die for the roller in the planetary roller screw pair, the number of starts of the rolled thread is greater than or equal to 1.

[0011] In the above-mentioned axial feed type rolling die for the roller in the planetary roller screw pair, the axial length of the rough machining roller or the finish machining roller is an integer multiple of the pitch of the rolled thread.

[0012] An axial feed type rolling method for the roller in the planetary roller screw pair, which uses the above-mentioned rolling die for processing, includes the following steps:

[0013] Step A: Set the rough machining die: The rough machining die includes three rough machining rollers with equal lengths. The three rough machining rollers are equally spaced and arranged in parallel. The end faces of the three rough machining rollers are in the same plane, and the space between the three rough machining rollers forms a rough machining space.

[0014] Step B: Clamp the workpiece at the first end of the rough machining space, so that the front end of the workpiece faces the center position of the rough machining space.

[0015] Step C: Adjust the phase deflection angles of the three rough machining rollers in sequence The phase deflection adjustment direction of the rough machining roller is the rotation direction of the rough machining roller. The adjustment formula is as follows:

[0016]

[0017] In the formula: is the phase deflection angle of the i-th rough machining roller; i is the i-th rough machining roller, and i takes 1, 2 or 3; n w is the number of starts of the thread to be machined on the workpiece; N is the total number of rough machining rollers; n g is the number of starts of the rolled thread;

[0018] Step D: Perform rough machining: The three rough machining rollers rotate at the same angular velocity W g1Start rolling. The workpiece enters the rough machining space at an axial velocity V1. The surface of the workpiece comes into contact with the surface of the rough machining rollers. The workpiece rotates under the rolling of the three rough machining rollers and simultaneously undergoes rolling pressure machining until the rotation of the rough machining rollers stops when the rear end of the workpiece completely exits from the second end of the rough machining space, and a complete external thread and partial thread teeth are machined on the surface of the workpiece to complete rough machining.

[0019] Step E: Set up the finish machining die: The finish machining die includes three finish machining rollers, and the arrangement of the three finish machining rollers is the same as that of the three rough machining rollers; the helix direction of the rolled thread on the surface of the finish machining roller is opposite to the helix direction of the rolled thread on the surface of the rough machining roller; the space between the three finish machining rollers forms the finish machining space.

[0020] Step F: Adjust the orientation of the workpiece so that the rear end of the workpiece faces the center position of the finish machining space, and clamp the workpiece on the first end of the finish machining space; then sequentially adjust the phase deflection angles of the three finish machining rollers.

[0021] Step G: Perform finish machining: The three finish machining rollers start to roll at the same angular velocity W. g2 W g2 is opposite to W g1 in direction. The rough machined workpiece enters the finish machining space at an axial velocity V2 for finish machining until the front end of the workpiece completely exits from the second end of the finish machining space, and complete thread teeth are machined on the surface of the workpiece to complete finish machining and form the roller.

[0022] In the above axial feed type rolling pressure machining method of the roller in the planetary roller screw pair, when rough machining is performed in step D, the specific machining process is as follows:

[0023] a1: The A1 end of the thread tooth rolling forming section A on each rough machining roller is adjacent to the workpiece. As the rough machining roller rotates, the thread tooth rolling forming section A rolls and machines the surface of the workpiece from the A1 end to the A2 end.

[0024] a2: Subsequently, the rolled thread rolls and machines the surface of the workpiece.

[0025] a3: As the workpiece moves axially, the workpiece approaches and contacts the thread tooth rolling forming section B, and the thread tooth rolling forming section B rolls and machines the surface of the workpiece from the B1 end to the B2 end until the workpiece completely exits from the second end of the rough machining space.

[0026] The above-mentioned axial feed type rolling process method of the rollers in the planetary roller screw pair, the length of the rough machining roller or the length of the finish machining roller is equal to the length of the machining surface of the workpiece; in step E, the distribution angles of the thread tooth rolling forming section A and the thread tooth rolling forming section B on the rough machining roller or the finish machining roller are both

[0027]

[0028] where: n w is the number of threads of the thread to be machined on the workpiece; n g is the number of threads of the rolled thread;

[0029] The thread pitch of the thread on the workpiece is the same as the thread pitch of the rolled thread, and the lead angle of the rolled thread is greater than the lead angle of the thread on the workpiece; the selection formula for the rolled thread is:

[0030] ψ g ≠ψ w

[0031] l g =l w

[0032] 0.3p>|πd w (tan -1 ψ w -tan -1 ψ g )|

[0033] where: ψ g is the lead angle of the rolled thread; ψ w is the lead angle of the thread to be machined on the workpiece; l g is the length of the rolled thread; l w is the length of the thread to be machined on the workpiece; p is the thread pitch; d w is the pitch diameter of the thread to be machined on the workpiece.

[0034] The technical solution of the present invention has achieved the following beneficial technical effects:

[0035] 1. As a new type of roller production mold in the present invention, during the axial feed rolling construction, it can automatically complete the processing of the threaded section and the threaded tooth section on the surface of the roller, greatly improving the production efficiency. And due to the adoption of axial feed, the features on the surface of the roller are gradually processed, the forming force borne by the mold is greatly reduced compared with the traditional processing mold, the wear speed of the mold is reduced, and the service life of the mold is increased. In the traditional process of turning threads and then hobbing, the metal structure of the part is cut off after processing, and a certain amount of material waste is caused. Compared with the traditional processing process, in the processing method of the present invention, the hardness and strength of the surface layer metal of the workpiece are greatly enhanced and improved during the rolling process, with excellent mechanical properties, and the processing procedure is simplified, the production efficiency is improved. During the manufacturing process, the surface layer metal structure of the workpiece is not cut off, no chips are generated, material waste is avoided, and the surface continuity of the workpiece after processing is good.

[0036] 2. For the roller produced by using the processing mold of the present invention, the threaded tooth section and the threaded section of the roller are connected to each other, there is no tool withdrawal groove between them, and its axial dimension is effectively shortened, which is beneficial to achieving a more compact and precise layout. When the threaded teeth on the roller are formed, the workpiece material itself is first rolled by the rolling thread, generating axial rolling strengthening, and then is rolled by the rolling forming section of the threaded teeth, forming circumferential rolling strengthening, that is, the threaded teeth are strengthened by extrusion in two directions. Therefore, the produced roller has higher strength, especially the strength of the threaded teeth is greatly improved, and the mechanical properties are more excellent.

[0037] 3. By dividing the processing stages and using a metal material with higher strength for the finishing mold, it is beneficial to further improve the surface accuracy of the roller, while rolling out complete threaded teeth and effectively reducing the mold wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of rough machining of the present invention;

[0039] Figure 2 Schematic diagram of finish machining of the present invention;

[0040] Figure 3 Schematic three - dimensional structure diagram of the roller of the present invention;

[0041] Figure 4 The present invention Figure 3 Enlarged structure diagram at I;

[0042] Figure 5 Schematic diagram of the end face structure of the roller of the present invention;

[0043] Figure 6 Schematic diagram of the wheel surface structure of the roller of the present invention;

[0044] Figure 7Schematic diagram of the workpiece after rolling and forming in the present invention.

[0045] In the figure, the reference numerals are represented as follows: 1 - rough machining roller; 101 - rolled thread; 102 - thread tooth rolling forming section A; 103 - thread tooth rolling forming section B; 104 - tooth groove; 2 - workpiece; 3 - finish machining roller. Specific implementation manner

[0046] Example 1

[0047] In the axially fed rolling die for the roller in the planetary roller screw pair in this embodiment, as Figures 1-3 shown, it includes a rough machining roller 1 and a finish machining roller 3. Rolled threads 101 are provided on the outer circumferential surfaces of the rough machining roller 1 and the finish machining roller 3. Thread tooth rolling forming sections A 102 and thread tooth rolling forming sections B 103 are respectively provided at both ends of the rolled thread 101. The thread tooth rolling forming sections A 102 and the thread tooth rolling forming sections B 103 are both arranged in the circumferential direction, and the distribution angles of the thread tooth rolling forming sections A 102 and the thread tooth rolling forming sections B 103 are both less than 360°; the helix directions of the rolled threads 101 on the rough machining roller 1 and the finish machining roller 3 are opposite, and the remaining structures and parameters are the same. Specifically, the distribution angles of the thread tooth rolling forming sections A 102 and the thread tooth rolling forming sections B 103 on the roller are both

[0048]

[0049] In the formula: n w is the number of threads of the thread to be machined on the workpiece; n g is the number of threads of the rolled thread.

[0050] The number of threads of the rolled thread 101 is greater than or equal to 1. In this embodiment, the number of threads of the rolled thread 101 is 8; the axial length of the roller is an integer multiple of the pitch of the rolled thread 101.

[0051] Such as Figure 3 、 Figure 6 shown, the thread tooth rolling forming section A 102 is arranged at the starting position of the rolled thread 101, and the thread tooth rolling forming section B 103 is arranged at the end position of the rolled thread 101; the thread tooth rolling forming section A 102 and the thread tooth rolling forming section B 103 are symmetrically distributed with respect to the cross-section of the roller that equally divides the roller axially, and the thread tooth rolling forming section A 102 and the thread tooth rolling forming section B 103 are parallel to each other. Such as Figure 3As shown, the axial distance between the thread tooth rolling forming section A102 and the thread tooth rolling forming section B103 is greater than zero, so that threads are formed in the middle of the surface of the workpiece 2, and thread teeth are formed at both ends.

[0052] As Figure 4 shown, the major diameter of the thread tooth rolling forming section A102 is less than or equal to the major diameter of the rolled thread 101, the major diameter of the thread tooth rolling forming section B103 is less than or equal to the major diameter of the rolled thread 101. The thread tooth rolling forming section A102 and the thread tooth rolling forming section B103 are both composed of more than two tooth grooves 104. The tooth grooves 104 are arranged along the axial direction of the roller, and more than two tooth grooves 104 are arranged at equal intervals along the circumferential direction of the roller.

[0053] In order to ensure the stability during processing, chamfers are provided on the edges of both end faces of the roller, and the angle of the chamfer is 25°.

[0054] Embodiment 2

[0055] For the axial feed type rolling processing method of the roller in the planetary roller screw pair in this embodiment, the rolling processing die described in Embodiment 1 is used for processing, and the method includes the following steps:

[0056] Step A: As Figure 1 shown, set the roughing die: The roughing die includes three equally long roughing rollers 1. The three roughing rollers 1 are distributed at equal intervals and arranged in parallel. The end faces of the three roughing rollers 1 are in the same plane. The space between the three roughing rollers 1 forms a roughing space; in actual processing, equipment such as a thread rolling machine can be used to drive the roller to rotate;

[0057] Step B: Clamp the workpiece 2 at the first end of the roughing space, make the front end of the workpiece 2 face the center position of the roughing space, and the length of the roller 1 is equal to the length of the processing surface of the workpiece 2;

[0058] Step C: Adjust the phase deflection angle of the three roughing rollers 1 in turn The phase deflection adjustment direction of the roughing roller 1 is the rotation direction of the roughing roller 1, and the adjustment formula is as follows:

[0059]

[0060] In the formula: is the phase deflection angle of the i-th roughing roller 1; i is the i-th roughing roller 1, and i takes 1, 2 or 3; n w is the number of thread lines of the thread to be processed on the workpiece 2; N is the total number of roughing rollers 1; n gis the number of threads of the rolled thread 101 on the roughing roller 1; specifically, in this embodiment, three roughing rollers 1 are used. The number of threads of the thread processed on the workpiece 2 is 1, and the number of threads of the rolled thread 101 is 8. It can be calculated that the adjustment angle of the first roughing roller 1 is 0, and the adjustment angle of the second roughing roller 1 is and so on; in the initial state, the A1 end of the thread tooth rolling forming section A102 on each roughing roller 1 is in the direction facing the surface of the workpiece 2, and then the phase deflection angle of the roughing roller 1 is adjusted in sequence;

[0061] Step D: Perform rough machining: The three roughing rollers 1 start to roll at the same angular velocity W g1 The workpiece 2 enters the rough machining space at the axial velocity V1. The surface of the workpiece 2 contacts the surface of the roughing roller 1. The workpiece 2 rotates under the rolling of the three roughing rollers 1 and synchronously performs rolling machining until the rotation of the roughing roller 1 stops when the rear end of the workpiece 2 completely exits from the second end of the rough machining space. A complete external thread and part of the thread teeth are machined on the surface of the workpiece 2 to complete the rough machining;

[0062] During the rough rolling process, the specific machining process is as follows:

[0063] a1: The A1 end of the thread tooth rolling forming section A on each roughing roller 1 is adjacent to the workpiece. As the roller rotates, the thread tooth rolling forming section A rolls the surface of the workpiece from the A1 end to the A2 end;

[0064] a2: The rolled thread rolls the surface of the workpiece;

[0065] a3: As the workpiece moves axially, the workpiece approaches and contacts the thread tooth rolling forming section B. The thread tooth rolling forming section B rolls the surface of the workpiece from the B1 end to the B2 end until the workpiece completely exits from the second end of the roller.

[0066] Step E: As Figure 2 shown, set up the finish machining die: The finish machining die includes three finish machining rollers 3. The arrangement of the three finish machining rollers 3 is the same as that of the three roughing rollers 1; the helix direction of the rolled thread 101 on the surface of the finish machining roller 3 is opposite to the helix direction of the rolled thread 101 on the surface of the roughing roller 1; the space between the three finish machining rollers 3 forms a finish machining space;

[0067] Step F: Clamp the workpiece 2 at the first end of the finish machining space and adjust the orientation of the workpiece 2 so that the rear end of the workpiece 2 faces the center position of the finish machining space; then adjust the phase deflection angle of the three finish machining rollers 3 in sequence The adjustment method is the same as that in Step C;

[0068] Step G: Finishing: The three finishing rollers 3 move at the same angular velocity W. g2 Start rolling, W g2 With W g1 In the opposite direction, the workpiece 2 after rough machining enters the finishing space at an axial speed V2 for finishing machining until the front end of the workpiece 2 completely withdraws from the second end of the finishing space, and complete thread teeth are machined on the surface of the workpiece 2, completing the finishing and forming a roller.

[0069] The thread tooth rolling forming section A102 and the thread tooth rolling forming section B103 are distributed at angles on the roller.

[0070]

[0071] Where: n w The number of threads to be machined on the workpiece; n g The number of rolled thread lines.

[0072] The pitch of the thread on the workpiece 2 is the same as the pitch of the rolled thread 101, and the thread lead angle of the rolled thread 101 is greater than the thread lead angle of the thread on the workpiece 2; the selection formula for the rolled thread 101 on the roller is:

[0073] ψ g ≠ψ w

[0074] l g = l w

[0075] 0.3p>|πd w (tan -1 ψ w -tan -1 ψ g )|

[0076] Where: g is the thread lead angle of the rolled thread; ψ w The lead angle of the thread to be machined on the workpiece; l g is the length of the rolled thread; l w is the length of the thread to be machined on the workpiece; p is the pitch; d w It is the mean diameter of the thread to be machined on the workpiece.

[0077] In the axial feed rolling processing method for the rollers in the planetary roller screw pair in this embodiment, the calculation formula for the minimum median diameter of the rollers that can be processed is:

[0078]

[0079] Where: d wIt is the pitch diameter of the thread to be machined on the workpiece: d g It is the pitch diameter of the roller.

[0080] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the claims of this patent application.

Claims

1. Axial feed type rolling die for rollers in planetary roller screw pairs, characterized in that, It includes a rough machining roller (1) and a finish machining roller (3). Thread rolling threads (101) are provided on the outer circumferential surfaces of the rough machining roller (1) and the finish machining roller (3). At both ends of the thread rolling thread (101), a thread tooth rolling forming section A (102) and a thread tooth rolling forming section B (103) are respectively provided. The thread tooth rolling forming section A (102) and the thread tooth rolling forming section B (103) are both arranged along the circumferential direction, and the distribution angles of the thread tooth rolling forming section A (102) and the thread tooth rolling forming section B (103) are both less than 360°. The rough machining die includes three equally long rough machining rollers (1). The three rough machining rollers (1) are equally spaced and arranged in parallel. The end faces of the three rough machining rollers (1) are in the same plane. The space between the three rough machining rollers (1) forms a rough machining space. The finish machining die includes three finish machining rollers (3). The three finish machining rollers (3) are arranged in the same way as the three rough machining rollers (1). The helix direction of the thread rolling thread (101) on the surface of the finish machining roller (3) is opposite to that of the thread rolling thread (101) on the surface of the rough machining roller (1). The space between the three finish machining rollers (3) forms a finish machining space.

2. The axial feed type rolling die for the roller in the planetary roller screw pair according to claim 1, characterized in that, The thread tooth rolling forming section A (102) is arranged at the starting position of the thread rolling thread (101); the thread tooth rolling forming section B (103) is arranged at the end position of the thread rolling thread (101).

3. The axial feed type rolling die for the roller in the planetary roller screw pair according to claim 2, characterized in that, The thread tooth rolling forming section A (102) and the thread tooth rolling forming section B (103) are symmetrically distributed; the thread tooth rolling forming section A (102) and the thread tooth rolling forming section B (103) are parallel to each other.

4. The axial feed type rolling die for the roller in the planetary roller screw pair according to claim 1, characterized in that, The major diameter of the thread tooth rolling forming section A (102) is less than or equal to the major diameter of the thread rolling thread (101); the major diameter of the thread tooth rolling forming section B (103) is less than or equal to the major diameter of the thread rolling thread (101).

5. The axial feed type rolling die for the roller in the planetary roller screw pair according to any one of claims 1-4, characterized in that, The thread tooth rolling forming section A (102) and the thread tooth rolling forming section B (103) are both composed of more than two tooth grooves (104). The tooth grooves (104) are axially opened, and more than two tooth grooves (104) are equally spaced along the circumferential direction.

6. The axial feed type rolling die for the roller in the planetary roller screw pair according to claim 1, characterized in that, The number of threads of the thread rolling thread (101) is greater than or equal to 1.

7. The axial feed type rolling die for the roller in the planetary roller screw pair according to claim 1, characterized in that, The axial length of the rough machining roller (1) or the finish machining roller (3) is an integer multiple of the pitch of the thread rolling thread (101).

8. Axial feed type rolling method for rollers in planetary roller screw pairs, characterized in that, Using the rolling processing die according to any one of claims 1-7 for processing, includes the following steps: Step A: Set up the rough machining die; Step B: Clamp the workpiece (2) on the first end of the rough machining space, so that the front end of the workpiece (2) faces the center position of the rough machining space; Step C: Adjust the phase deflection angles of the three roughing rollers (1) in sequence The direction of phase deflection adjustment of the roughing roller (1) is the rotation direction of the roughing roller (1), and the adjustment formula is as follows: Wherein: is the phase deflection angle of the i-th roughing roller (1); i is the i-th roughing roller (1), and i takes 1, 2 or 3; n w is the number of threads of the thread to be machined on the workpiece (2); N is the total number of roughing rollers (1); n g is the number of threads of the rolled thread (101); Step D: Perform rough machining: Three rough machining rollers (1) start to roll at the same angular velocity W g1 The workpiece (2) enters the rough machining space at an axial velocity V1. The surface of the workpiece (2) contacts the surface of the rough machining rollers (1). The workpiece (2) rotates under the rolling of the three rough machining rollers (1) and simultaneously undergoes rolling machining. When the rear end of the workpiece (2) completely exits from the second end of the rough machining space, the rough machining rollers (1) stop rotating. A complete external thread and partial thread teeth are machined on the surface of the workpiece (2) to complete the rough machining; Step E: Set up the finish machining die; Step F: Adjust the orientation of the workpiece (2) so that the rear end of the workpiece (2) faces the center position of the finish machining space, and clamp the workpiece (2) on the first end of the finish machining space; then sequentially adjust the phase deflection angles of the three finish machining rollers (3) Step G: Finishing: The three finishing rollers (3) move at the same angular velocity W. g2 Start rolling, W g2 With W g1 In the opposite direction, the workpiece (2) after rough machining enters the finishing space at an axial speed V2 for finishing machining until the front end of the workpiece (2) completely withdraws from the second end of the finishing space, and complete thread teeth are machined on the surface of the workpiece (2), completing the finishing and forming a roller.

9. The axial feed type rolling method of the roller in the planetary roller screw pair according to claim 8, characterized in that, When rough machining is carried out in step D, the specific machining process is as follows: a1: The A1 end of the thread tooth rolling forming section A (102) on each roughing roller (1) is adjacent to the workpiece (2). As the roughing roller (1) rotates, the thread tooth rolling forming section A (102) rolls the surface of the workpiece (2) from the A1 end to the A2 end; a2: Subsequently, the rolling thread (101) rolls the surface of the workpiece (2); a3: As the workpiece (2) moves axially, the workpiece (2) approaches and contacts the thread tooth rolling forming section B (103). The thread tooth rolling forming section B (103) rolls the surface of the workpiece (2) from the B1 end to the B2 end until the workpiece (2) completely exits from the second end of the roughing space.

10. The axial feed type rolling method of the roller in the planetary roller screw pair according to claim 8, characterized in that, The length of the rough machining roller (1) or the length of the finish machining roller (3) is equal to the length of the machining surface of the workpiece (2); in step E, the distribution angles of the thread tooth rolling forming section A (102) and the thread tooth rolling forming section B (103) on the rough machining roller (1) or the finish machining roller (3) are both Where: n w is the number of threads of the thread to be machined on the workpiece; n g is the number of threads of the rolled thread; The thread pitch on the workpiece (2) is the same as the thread pitch of the rolling thread (101), and the lead angle of the rolling thread (101) is greater than the lead angle of the thread on the workpiece (2); The selection formula for the rolling thread (101) is: ψ g ≠ ψ w l g ＝l w 0.3p > |πd w (tan -1 ψ w -tan -1 ψ g )| Where: ψ g is the lead angle of the rolled thread; ψ w is the lead angle of the thread to be machined on the workpiece; l g is the length of the rolled thread; l w is the length of the thread to be machined on the workpiece; p is the pitch; d w is the pitch diameter of the thread to be machined on the workpiece.

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