CN112775366B - Differential planetary roller screw nut annular groove plastic forming device and process - Google Patents

Differential planetary roller screw nut annular groove plastic forming device and process Download PDF

Info

Publication number
CN112775366B
CN112775366B CN202110055276.XA CN202110055276A CN112775366B CN 112775366 B CN112775366 B CN 112775366B CN 202110055276 A CN202110055276 A CN 202110055276A CN 112775366 B CN112775366 B CN 112775366B
Authority
CN
China
Prior art keywords
workpiece
rolling die
block
wedge
tooth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110055276.XA
Other languages
Chinese (zh)
Other versions
CN112775366A (en
Inventor
张大伟
张硕文
卢昆银
赵升吨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Jiaotong University
Original Assignee
Xian Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Jiaotong University filed Critical Xian Jiaotong University
Priority to CN202110055276.XA priority Critical patent/CN112775366B/en
Publication of CN112775366A publication Critical patent/CN112775366A/en
Application granted granted Critical
Publication of CN112775366B publication Critical patent/CN112775366B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H9/00—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass
    • B21H9/02—Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass for screw-rolling machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A differential planet roller screw nut ring groove plastic forming device and process, the device includes eccentric system and rolling system, the eccentric system is formed by support, wedge and slide block, connect with the wedge on the support, connect with the slide block on the support above the wedge; the rolling system comprises a support shaft, a sliding bearing, a rolling die and a retaining ring, wherein one end of the support shaft is fixedly connected with the sliding block, the sliding bearing is arranged on the support shaft, the rolling die is arranged on the sliding bearing, and the sliding bearing and the rolling die are axially positioned through a shaft shoulder of the support shaft and the retaining ring; the process is that a workpiece is clamped firstly, and the axis of the workpiece is ensured to be coincident with the axis of a rolling die; then the workpiece or the rolling die is axially fed, the wedge block axially moves, the workpiece rotates, and the annular groove on the inner surface of the nut is formed; the wedge block retracts along the axial direction, the slide block moves downwards, and the material is discharged; the invention can reduce material waste, improve processing efficiency, and improve fatigue resistance and surface quality of parts.

Description

Differential planetary roller screw nut annular groove plastic forming device and process
Technical Field
The invention belongs to the technical field of advanced material forming and manufacturing, and particularly relates to a differential planetary roller screw nut annular groove plastic forming device and process.
Background
Swedish in 1942 invented a planetary roller screw pair, and the planetary roller screw is widely accepted and applied by the advantages of high bearing, impact resistance, high precision and the like. However, the roller screw has a complicated structure and requires high machining accuracy and the like, and particularly, the roller structure includes a thread and a gear structure. A PWG type differential planetary roller screw is developed by German aerospace center in 1993, the PWG type differential planetary roller screw is based on the principle of the planetary roller screw and integrates planetary transmission and screw transmission, and a nut, a screw rod and a roller are all in a ring groove structure.
However, the existing nut inner annular groove generally adopts a cutting process, so that the cutting process causes material waste and has the problem of low efficiency; meanwhile, the metal fiber is cut off by the cutting process, so that the strength of the material is reduced, and the fatigue resistance of the part is low.
In the aspect of plastic forming of the inner surface of a workpiece, an axial feed roll forming process (Shuowen Zhang, Dawei Zhang, Yongfei Wang, et al. the planar rolling process of forming the internal thread, International Journal of Advanced Manufacturing Technology,2020,107: 3543-; in addition, the diameter of the ring-shaped groove nut in the PWG type differential planetary roller screw nut is generally small, and the diameter of a rolling die is required to be very small, which increases the difficulty of manufacturing the rolling wheel and reduces the rigidity of a die supporting shaft, thereby reducing the accuracy of nut manufacturing.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a differential type planetary roller screw nut annular groove plastic forming device and process, which can reduce material waste, improve the processing efficiency, and improve the fatigue resistance and surface quality of parts.
In order to achieve the purpose, the invention adopts the technical scheme that:
a differential planet roller screw nut ring groove plastic forming device comprises an eccentric system and a rolling system, wherein the eccentric system enables the axis of a rolling die and the axis of a blank not to be coaxial to generate eccentricity; the rolling system completes the plastic forming of the annular groove on the inner surface of the nut;
the eccentric system is composed of a bracket 1, a wedge block 2 and a sliding block 3, wherein the lower end of the bracket 1 is fixed on a guide rail or fixedly connected on a rack; the bracket 1 is connected with a wedge block 2, and the bracket 1 above the wedge block 2 is connected with a slide block 3;
the rolling system comprises a support shaft 4, a sliding bearing 5, a rolling die 6 and a retainer ring 7, wherein one end of the support shaft 4 is fixedly connected with the sliding block 3, the sliding bearing 5 is installed on the support shaft 4, the rolling die 6 is installed on the sliding bearing 5, and the sliding bearing 5 and the rolling die 6 are axially positioned through a shaft shoulder of the support shaft 4 and the retainer ring 7.
A concave notch is arranged at the upper part of the bracket 1, a first groove 101 is arranged at the bottom of the concave notch, and a first protruding guide 102 is arranged on the side surface of the concave notch;
the bottom of the wedge block 2 is provided with a second protruding guide 201, the upper part of the wedge block is provided with a second groove 202, the top of the wedge block is provided with a first inclined surface 203, the angle of the first inclined surface 203 is determined by the eccentric distance of a rolling die, namely the radial feed distance H and the axial displacement L of the wedge block 2 along a workpiece or a die, the angle theta of the first inclined surface 203 is more than or equal to arctan (H/L), and the axial length of the wedge block 2 along the workpiece or the die is more than L;
a third groove 301 is formed in the side face of the sliding block 3, a third protruding guide 303 is arranged at the bottom of the sliding block 3, a second inclined plane 302 is arranged at the bottom of the sliding block, and the angle of the second inclined plane 302 is the same as that of the first inclined plane of the wedge block 2;
the second protruding guide 201 on the wedge block 2 is matched with the first groove 101 on the upper part of the bracket 1, the second groove 202 is matched with the third protruding guide 303 on the sliding block 3, and the first inclined surface 203 on the wedge block 2 is contacted with the second inclined surface 302 on the bottom of the sliding block 3; the third groove 301 of the side surface of the sliding block 3 is matched with the first protruding guide 102 of the upper part of the bracket 1, so that the vertical movement of the sliding block 3 is ensured.
The tooth-shaped structure of the rolling die 6 is determined by the tooth shape of the annular groove on the inner surface of the nut to be formed, the height of the tooth-shaped structure of the rolling die 6 is h, and h is hw+c，hwThe tooth form height of an inner ring groove of the nut is shown, and c is the meshing clearance between the tooth form of a rolling die and the nut; the tooth thickness of the tooth-shaped structure of the rolling die 6 corresponds to the tooth space of the nut, the tooth space of the tooth-shaped structure of the rolling die 6 corresponds to the tooth thickness of the nut, and the tooth top of the tooth-shaped structure of the rolling die 6 is in gapless fit with the tooth bottom of the tooth shape of the inner ring-shaped groove of the nut; the maximum outer diameter D of the tooth-shaped structure of the rolling die 6 is less than or equal to Dmin，DminThe axial distribution of the tooth-shaped structure of the rolling die 6 corresponds to the inner annular groove of the formed thread for the minimum inner diameter of the formed nut, and the axial length is not less than the axial length of the corresponding inner annular groove of the formed thread.
The process of utilizing the differential planetary roller screw nut annular groove plastic forming device comprises the following steps:
step 1, assembling a forming device: firstly, fixedly connecting a support shaft 4 with a sliding block 3, installing a sliding bearing 5 and a rolling die 6 on the support shaft 4, and positioning the sliding bearing through a retaining ring 7; then, the third groove 301 of the sliding block 3 is matched with the first protruding guide 102 of the bracket 1 to ensure the movement of the sliding block 3 in the vertical direction, when the sliding block 3 is installed on the bracket 1, the wedge block 2 is inserted, so that the second protruding guide 201 of the wedge block 2 is matched with the first groove 101 of the bracket 1, and simultaneously the second groove 202 of the wedge block 2 is ensured to be matched with the third protruding guide 303 on the sliding block 3, and at the moment, the first inclined surface 203 of the wedge block 2 is just matched with the second inclined surface 302 of the sliding block 3;
step 2, clamping a workpiece, wherein the workpiece is of a hollow structure, and the axis of the workpiece is ensured to be superposed with the axis of the rolling die 6 during clamping;
step 3, axially feeding a workpiece or a rolling die:
if the support 1 is fixedly connected with the rack, the workpiece moves towards the support 1 along the axial direction until the rolling die 6 enters the interior of the workpiece and reaches a designated position;
if the support 1 is fixedly connected on the guide rail, the support 1 moves towards the workpiece, so that the rolling die 6 enters the interior of the workpiece to reach a designated position;
when the rolling die 6 moves to a specified position, the workpiece is kept still or starts to rotate at a constant rotation speed omega;
and 4, moving the wedge block 2 in the axial direction at a speed v, moving the slide block 3 in the vertical direction at a speed Hv/L until the rolling die reaches the maximum eccentric distance H, and enabling 2H + D to be Dmax，DmaxThe minimum inner diameter of the formed nut;
if the workpiece is kept still, the workpiece starts to rotate at the moment, and the rotation time of the workpiece is not less than 2 pi/omega;
if the workpiece rotates at a constant speed omega, the rotation time of the workpiece is not less than 2 pi/omega after the slide block 3 moves to the specified displacement;
step 5, after the workpiece rotates for a set time, forming an annular groove on the inner surface of the nut, and stopping the rotation of the workpiece; the wedge block 2 retracts along the axial direction, and the slide block 3 moves downwards until the axis of the rolling die 6 is collinear with the axis of the workpiece;
step 6, if the support 1 is fixedly connected with the rack, the workpiece returns to the original position along the axial direction; if the support 1 is fixed on the frame, the support 1 is withdrawn to the original position along the axial direction, namely the rolling die 6 is separated from the workpiece, and the unloading is carried out.
The invention has the beneficial effects that: by forming and processing the annular groove on the inner surface of the planetary roller screw nut, the waste of materials can be reduced, and the utilization rate of the materials is improved; the fatigue resistance of the formed part is improved by utilizing the work hardening of the material during the plastic forming, and the surface quality of the processing groove can be improved; the annular groove on the inner surface of the nut is formed by rolling through a rolling die, so that the processing efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention.
Fig. 2 is a schematic structural view of the stent 1.
Fig. 3 is a schematic structural view of the wedge-shaped block 2.
Fig. 4 is a schematic structural view of the slider 3.
Fig. 5 is a schematic diagram of the assembly structure of the device of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples.
A differential planet roller screw nut ring groove plastic forming device comprises an eccentric system and a rolling system, wherein the eccentric system enables the axis of a rolling die and the axis of a blank not to be coaxial to generate eccentricity; the rolling system completes the plastic forming of the annular groove on the inner surface of the nut;
referring to fig. 1, the eccentric system is composed of a bracket 1, a wedge block 2 and a slide block 3, wherein the lower end of the bracket 1 is fixed on a guide rail and can move axially along the guide rail or is fixedly connected on a frame; the bracket 1 is connected with a wedge block 2, and the bracket 1 above the wedge block 2 is connected with a slide block 3;
referring to fig. 2, a concave notch is arranged at the upper part of the bracket 1, a first groove 101 is arranged at the bottom of the concave notch, and a first protruding guide 102 is arranged on the side surface of the concave notch;
referring to fig. 3, the bottom of the wedge-shaped block 2 is provided with a second protruding guide 201, the upper part of the wedge-shaped block is provided with a second groove 202, the top of the wedge-shaped block is provided with a first inclined surface 203, the angle of the first inclined surface 203 is determined by the eccentric distance of a rolling die, namely the radial feed distance H, and the displacement L of the wedge-shaped block 2 along the axial direction of a workpiece or a die, the angle theta of the first inclined surface 203 is larger than or equal to arctan (H/L), and the axial length of the wedge-shaped block 2 along the workpiece or the die is larger than L;
referring to fig. 4, a third groove 301 is formed in the side surface of the sliding block 3, a third protruding guide 303 is formed at the bottom of the sliding block 3, a second inclined surface 302 is formed at the bottom of the sliding block, and the angle of the second inclined surface 302 is the same as that of the first inclined surface of the wedge block 2;
the second protruding guide 201 on the wedge block 2 is matched with the first groove 101 on the upper part of the bracket 1, the second groove 202 is matched with the third protruding guide 303 on the sliding block 3, and the first inclined surface 203 on the wedge block 2 is contacted with the second inclined surface 302 on the bottom of the sliding block 3; the third groove 301 of the side surface of the sliding block 3 is matched with the first protruding guide 102 of the upper part of the bracket 1, so that the vertical movement of the sliding block 3 is ensured.
Referring to fig. 1, the rolling system comprises a support shaft 4, a sliding bearing 5, a rolling die 6 and a retaining ring 7, wherein one end of the support shaft 4 is fixedly connected with a sliding block 3, the sliding bearing 5 is installed on the support shaft 4, the rolling die 6 is installed on the sliding bearing 5, the sliding bearing 5 is matched with the rolling die 6 to ensure the rotation of the rolling die 6, and the axial directions of the sliding bearing 5 and the rolling die 6 are positioned through a shaft shoulder of the support shaft 4 and the retaining ring 7.
The tooth-shaped structure of the rolling die 6 is determined by the tooth shape of the annular groove on the inner surface of the nut to be formed, the height of the tooth-shaped structure of the rolling die 6 is h, and h is hw+c，hwThe tooth form height of an inner ring groove of the nut is shown, and c is the meshing clearance between the tooth form of a rolling die and the nut; the tooth thickness of the tooth-shaped structure of the rolling die 6 corresponds to the tooth space of the nut, the tooth space of the tooth-shaped structure of the rolling die 6 corresponds to the tooth thickness of the nut, and the tooth top of the tooth-shaped structure of the rolling die 6 is in gapless fit with the tooth bottom of the tooth shape of the inner ring-shaped groove of the nut; the maximum outer diameter D of the tooth-shaped structure of the rolling die 6 is less than or equal to Dmin，DminThe axial distribution of the tooth-shaped structure of the rolling die 6 corresponds to the inner annular groove of the formed thread for the minimum inner diameter of the formed nut, and the axial length is not less than the axial length of the corresponding inner annular groove of the formed thread.
The process of utilizing the differential planetary roller screw nut annular groove plastic forming device comprises the following steps:
step 1, with reference to fig. 1 and 5, the forming device is assembled: firstly, fixedly connecting a support shaft 4 and a sliding block 3 through threads or other connection modes, installing a sliding bearing 5 and a rolling die 6 on the support shaft 4, and positioning the sliding bearing through a check ring 7; then, the third groove 301 of the sliding block 3 is matched with the first protruding guide 102 of the bracket 1 to ensure the movement of the sliding block 3 in the vertical direction, when the sliding block 3 is installed on the bracket 1, the wedge block 2 is inserted, so that the second protruding guide 201 of the wedge block 2 is matched with the first groove 101 of the bracket 1, and simultaneously the second groove 202 of the wedge block 2 is ensured to be matched with the third protruding guide 303 on the sliding block 3, and at the moment, the first inclined surface 203 of the wedge block 2 is just matched with the second inclined surface 302 of the sliding block 3;
step 2, clamping a workpiece, wherein the workpiece is of a hollow structure, and the axis of the workpiece is ensured to be superposed with the axis of the rolling die 6 during clamping;
step 3, axially feeding a workpiece or a rolling die:
if the support 1 is fixedly connected with the rack, the workpiece moves towards the support 1 along the axial direction until the rolling die 6 enters the interior of the workpiece and reaches a designated position;
if the support 1 is fixedly connected on the guide rail, the support 1 moves towards the workpiece, so that the rolling die 6 enters the interior of the workpiece to reach a designated position;
when the rolling die 6 moves to a specified position, the workpiece is kept still or starts to rotate at a constant rotation speed omega;
and 4, moving the wedge block 2 in the axial direction at a speed v, moving the slide block 3 in the vertical direction at a speed Hv/L until the rolling die reaches the maximum eccentric distance H, and enabling 2H + D to be Dmax，DmaxThe minimum inner diameter of the formed nut;
if the workpiece is kept still, the workpiece starts to rotate at the moment, and the rotation time of the workpiece is not less than 2 pi/omega;
if the workpiece rotates at a constant speed omega, the rotation time of the workpiece is not less than 2 pi/omega after the slide block 3 moves to the specified displacement;
step 5, after the workpiece rotates for a set time, forming an annular groove on the inner surface of the nut, and stopping the rotation of the workpiece; the wedge block 2 retracts axially, and at the same time, because the second protruding guide 201 of the wedge block 2 is matched with the first groove 101 of the bracket 1, and the second groove 202 of the wedge block 2 is matched with the third protruding guide 303 on the slide block 3, when the wedge block 2 retracts axially, the slide block 3 moves downwards until the axis of the rolling die 6 is collinear with the axis of the workpiece;
step 6, if the support 1 is fixedly connected with the rack, the workpiece returns to the original position along the axial direction; if the support 1 is fixed on the frame, the support 1 is withdrawn to the original position along the axial direction, namely the rolling die 6 is separated from the workpiece, and the unloading is carried out.

Claims (4)

1. The utility model provides a differential type planet roller screw nut ring channel plastic forming device, includes eccentric system and rolling system, its characterized in that: the eccentric system causes the axis of the rolling die and the axis of the blank to be different from each other, and eccentricity is generated; the rolling system completes the plastic forming of the annular groove on the inner surface of the nut;
the eccentric system consists of a bracket (1), a wedge block (2) and a sliding block (3), wherein the lower end of the bracket (1) is fixed on a guide rail or fixedly connected on a rack; the bracket (1) is connected with a wedge-shaped block (2), and the bracket (1) above the wedge-shaped block (2) is connected with a sliding block (3);
a concave notch is arranged at the upper part of the bracket (1), a first groove (101) is arranged at the bottom of the concave notch, and a first protruding guide (102) is arranged on the side surface of the concave notch;
the bottom of the wedge-shaped block (2) is provided with a second protruding guide (201), the upper part of the wedge-shaped block is provided with a second groove (202), the top of the wedge-shaped block is provided with a first inclined surface (203), the angle of the first inclined surface (203) is determined by the eccentric distance of a rolling die, namely the radial feed distance H and the axial displacement L of the wedge-shaped block (2) along a workpiece or a die, the angle theta of the first inclined surface (203) is not less than arctan (H/L), and the axial length of the wedge-shaped block (2) along the workpiece or the die is greater than L;
a third groove (301) is formed in the side face of the sliding block (3), a third protruding guide (303) is arranged at the bottom of the sliding block (3), a second inclined plane (302) is arranged at the bottom of the sliding block, and the angle of the second inclined plane (302) is the same as that of the first inclined plane of the wedge-shaped block (2);
a second protruding guide (201) on the wedge block (2) is matched with a first groove (101) on the upper part of the bracket (1), a second groove (202) is matched with a third protruding guide (303) on the sliding block (3), and a first inclined surface (203) on the wedge block (2) is contacted with a second inclined surface (302) at the bottom of the sliding block (3); the third groove (301) on the side surface of the sliding block (3) is matched with the first protruding guide (102) on the upper part of the bracket (1) to ensure the vertical movement of the sliding block (3).
2. The differential planetary roller screw nut ring groove plastic forming device of claim 1, characterized in that: the rolling system comprises a supporting shaft (4), a sliding bearing (5), a rolling die (6) and a check ring (7), one end of the supporting shaft (4) is fixedly connected with a sliding block (3), the sliding bearing (5) is installed on the supporting shaft (4), the rolling die (6) is installed on the sliding bearing (5), and the sliding bearing (5) and the rolling die (6) are axially positioned through a shaft shoulder of the supporting shaft (4) and the check ring (7).
3. The differential planetary roller screw nut ring groove plastic forming device of claim 2, characterized in that: the tooth-shaped structure of the rolling die (6) is determined by the tooth shape of the annular groove on the inner surface of the nut to be formed, the height of the tooth-shaped structure of the rolling die (6) is h, and h is hw+c，hwThe tooth form height of an inner ring groove of the nut is shown, and c is the meshing clearance between the tooth form of a rolling die and the nut; the tooth thickness of the tooth-shaped structure of the rolling die (6) corresponds to the tooth space of the nut, the tooth space of the tooth-shaped structure of the rolling die (6) corresponds to the tooth thickness of the nut, and the tooth top of the tooth-shaped structure of the rolling die (6) is in gapless fit with the tooth bottom of the tooth shape of the inner ring-shaped groove of the nut; the maximum outer diameter D of the tooth-shaped structure of the rolling die (6) is less than or equal to Dmin，DminThe axial distribution of the tooth-shaped structure of the rolling die (6) corresponds to the inner annular groove of the formed thread for the minimum inner diameter of the formed nut, and the axial length is not less than the axial length of the corresponding inner annular groove of the formed thread.
4. A process for utilizing a differential planetary roller screw nut ring groove plastic forming device of claim 1 or 3, characterized by the steps of:
step 1, assembling a forming device: firstly, fixedly connecting a support shaft (4) with a sliding block (3), installing a sliding bearing (5) and a rolling die (6) on the support shaft (4), and positioning the sliding bearing and the rolling die through a check ring (7); then, the third groove (301) of the sliding block (3) is matched with the first protruding guide (102) of the support (1) to ensure the movement of the sliding block (3) in the vertical direction, when the sliding block (3) is installed on the support (1), the wedge block (2) is inserted, the second protruding guide (201) of the wedge block (2) is matched with the first groove (101) of the support (1), meanwhile, the second groove (202) of the wedge block (2) is matched with the third protruding guide (303) on the sliding block (3), and at the moment, the first inclined surface (203) of the wedge block (2) is just matched with the second inclined surface (302) of the sliding block (3);
step 2, clamping a workpiece, wherein the workpiece is of a hollow structure, and the axis of the workpiece is ensured to be superposed with the axis of the rolling die (6) during clamping;
step 3, axially feeding a workpiece or a rolling die:
if the support (1) is fixedly connected with the rack, the workpiece moves towards the support (1) along the axial direction until the rolling die (6) enters the interior of the workpiece and reaches a designated position;
if the support (1) is fixedly connected on the guide rail, the support (1) moves towards the blank, so that the rolling die (6) enters the interior of the workpiece to reach a designated position;
when the rolling die (6) moves to a designated position, the workpiece is kept static or starts to rotate at a constant rotating speed omega;
and 4, moving the wedge block (2) along the axial direction at a speed v, and moving the slide block (3) along the vertical direction at a speed Hv/L until the rolling die reaches a maximum eccentric distance H, wherein 2H + D is Dmax，DmaxThe minimum inner diameter of the formed nut;
if the workpiece is kept still, the workpiece starts to rotate at the moment, and the rotation time of the workpiece is not less than 2 pi/omega;
if the workpiece rotates at a constant speed omega, the rotating time of the workpiece is not less than 2 pi/omega after the sliding block (3) moves to the specified displacement;
step 5, after the workpiece rotates for a set time, forming an annular groove on the inner surface of the nut, and stopping the rotation of the workpiece; the wedge block (2) retracts along the axial direction, and the slide block (3) moves downwards until the axis of the rolling die (6) is collinear with the axis of the workpiece;
step 6, if the support (1) is fixedly connected with the rack, the workpiece returns to the original position along the axial direction; if the support (1) is fixed on the frame, the support (1) retracts to the original position along the axial direction, namely the rolling die (6) is separated from the workpiece, and the material is unloaded.
CN202110055276.XA 2021-01-15 2021-01-15 Differential planetary roller screw nut annular groove plastic forming device and process Active CN112775366B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110055276.XA CN112775366B (en) 2021-01-15 2021-01-15 Differential planetary roller screw nut annular groove plastic forming device and process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110055276.XA CN112775366B (en) 2021-01-15 2021-01-15 Differential planetary roller screw nut annular groove plastic forming device and process

Publications (2)

Publication Number Publication Date
CN112775366A CN112775366A (en) 2021-05-11
CN112775366B true CN112775366B (en) 2021-12-28

Family

ID=75756148

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110055276.XA Active CN112775366B (en) 2021-01-15 2021-01-15 Differential planetary roller screw nut annular groove plastic forming device and process

Country Status (1)

Country Link
CN (1) CN112775366B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007054892A (en) * 2005-08-24 2007-03-08 Woojin Industry Co Ltd Form rolling method and apparatus
CN102553993A (en) * 2011-12-16 2012-07-11 西安交通大学 Eccentric shaft reducing mechanism for spline roll forming equipment
CN103370158A (en) * 2010-12-14 2013-10-23 埃莫克精密工具厂里查德格林普尔有限责任两合公司 Thread generating tool for producing a thread in a workpiece
CN111112522A (en) * 2020-03-20 2020-05-08 邯郸市太行紧固件制造有限公司 Supplementary thread rolling device of high strength bolt
CN211614155U (en) * 2019-12-27 2020-10-02 石家庄军马勇机械科技有限公司 Superstrong reinforcing bar straight thread machine tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007054892A (en) * 2005-08-24 2007-03-08 Woojin Industry Co Ltd Form rolling method and apparatus
CN103370158A (en) * 2010-12-14 2013-10-23 埃莫克精密工具厂里查德格林普尔有限责任两合公司 Thread generating tool for producing a thread in a workpiece
CN102553993A (en) * 2011-12-16 2012-07-11 西安交通大学 Eccentric shaft reducing mechanism for spline roll forming equipment
CN211614155U (en) * 2019-12-27 2020-10-02 石家庄军马勇机械科技有限公司 Superstrong reinforcing bar straight thread machine tool
CN111112522A (en) * 2020-03-20 2020-05-08 邯郸市太行紧固件制造有限公司 Supplementary thread rolling device of high strength bolt

Also Published As

Publication number Publication date
CN112775366A (en) 2021-05-11

Similar Documents

Publication Publication Date Title
US11583911B2 (en) Method for coreless spinning of large-ratio multi-variable-diameter hollow shaft
US8997541B2 (en) Method and device for stretch-flow forming
US10913103B2 (en) Method, module, and apparatus for roll-processing external pipe thread, and external pipe thread production line
CN210523513U (en) Coreless vertical spinning system for large-proportion multi-time reducing hollow shaft
CN102152084A (en) Processing method for inner hole of cylinder
CN108927557A (en) A kind of helical milling device and method
CN114871749A (en) Eccentric centering adjustment tool and adjustment method for self-aligning roller bearing
CN112775366B (en) Differential planetary roller screw nut annular groove plastic forming device and process
CN114603027A (en) Multistage spinning wheel type follow-up constraint spinning forming method for cylindrical part with inner ribs
CN117019978B (en) Opposite-roller spinning device with guiding and correcting functions
CN114192647A (en) Shearing forming method for annular outer rib cylindrical part
CN201483310U (en) Grinding double-ended chuck mechanism of charging roller of printer
CN220901463U (en) Forming quality detection device for roll forming sealing ring
CN112893721B (en) Differential type planetary roller screw nut split die roll forming device and process
CN202021351U (en) Large conic boring fixture
CN109794533B (en) Inner spinning forming method for cylinder with inner ring reinforcing ribs
CN109570433B (en) Rod pipe fatigue fracture blanking machine with real-time adjustable radial loading displacement
CN102240883B (en) Method for rolling inner bore of cylinder barrel
CN107427887B (en) Forming machine for spinning/extrusion molding and spinning/extrusion molding method
CN115229017A (en) Special-shaped paired wheel spinning machine
CN102922025A (en) Power cutter frame device capable of being lifted
CN110814239B (en) Multi-die synchronous rolling forming method for large-diameter internal tooth profile
CN109794534B (en) Multi-pass spinning forming method for cylinder with inner ring reinforcing ribs
CN109794535B (en) Internal spinning forming method
CN112775365B (en) Differential planet roller screw pair annular groove nut rolling device and process

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant