CN110814239B - Multi-die synchronous rolling forming method for large-diameter internal tooth profile - Google Patents
Multi-die synchronous rolling forming method for large-diameter internal tooth profile Download PDFInfo
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- 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
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
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Abstract
A synchronous roll forming method of large-diameter internal tooth type multiple dies, clamp the work piece blank first, the work piece blank is driven by the rotary table, N pairs of identical rolling dies are evenly arranged along the circumference of the work piece blank, each pair of rolling dies is divided into an inner roller die and an outer roller die, the inner and outer roller dies are used cooperatively, wherein, the inner roller die is a tooth die, and the outer roller die is a cylindrical die; then adjusting the centers of each pair of inner roller die and outer roller die to be on the same straight line with the center of the workpiece blank; finally, the workpiece blank is driven to rotate, the N inner roller dies synchronously and radially feed and rotate along with the workpiece blank through friction and tooth-shaped meshing, the plastic forming of the tooth shape on the workpiece blank is completed, the outer roller dies are axially fixed and only rotate through the friction with the workpiece blank; the invention can effectively reduce the forming force, reduce the equipment load, ensure accurate meshing in the inner gear ring forming process and ensure the roundness precision of the outer diameter of the inner gear ring.
Description
Technical Field
The invention belongs to the technical field of advanced material forming, and particularly relates to a multi-die synchronous roll forming method for a large-diameter (the diameter is larger than 100mm) internal tooth profile.
Background
The internal tooth type part is an important basic component and a mechanical element in a mechanical transmission device and is widely applied to the fields of automobile, aerospace, ship, equipment manufacturing and the like. With the development of equipment manufacturing, higher demands are made on the performance of the toothed members. The main processing technologies of the current internal tooth type include cutting processing and plastic forming. The traditional processing of the tooth-shaped part mainly comprises cutting processing, and particularly in the processing of large-diameter internal tooth part parts, the complex internal tooth shape mainly comprises the following processing steps: the machining process is complex, the manufacturing period is long, the manufacturing quality is difficult to guarantee, and meanwhile, material waste is caused. Compared with cutting processing, the plastic forming process has the advantages of high production efficiency, material saving, good streamline of workpieces, high mechanical property and the like.
In US20060272375, a plastic forming method of an internal tooth profile is proposed, in which a workpiece is a cup-shaped blank and is mounted in a chuck-shaped die, and a tooth-shaped die is arranged inside the cup-shaped blank and can be fed radially and axially to form a tooth shape; while the internal tooth and chuck dies may have independent drive mechanisms coupled by synchronizers to synchronize the rotation and maintain the matching kinematic relationship by control techniques. The forming method has the advantages that axial feeding and radial feeding exist simultaneously in the forming process, and when parts with tooth shapes of larger sizes relative to a blank are machined, the deformation resistance of a forming material is overlarge; a single rolling die is used in the forming process, the forming efficiency is low, the stress balance is difficult to ensure, and the forming die is required to have high strength, enough impact toughness and the like; after the workpiece in the chuck die is formed, the workpiece needs to be ejected out by a special tool, and the workpiece is difficult to take; meanwhile, the overall size and the shape of the chuck die are limited by the size of a machined part, and the chuck die is difficult to machine and manufacture aiming at the large-diameter internal tooth type part and is more suitable for machining a tooth type part with a smaller diameter.
The document (Veliko Ivanov, Rolling of internal threads: Part 2.Journal of materials Processing Technology,1997,72(2): 221-; it is considered that the internal thread part with large diameter is more than 50mm, only theoretical analysis examples of the internal diameter of 50-60mm are given in the text, however, due to the limitation of the size of the core mould, the processing of the internal thread with large diameter (the diameter is more than 100mm) has difficulty; in addition, for the formation of the internal thread of the multi-die, the phase position of each rolling die influences the shape of the formed internal thread, however, the phase adjustment method of each die is not given in the text.
The literature (Zhang D W et al, A note on phase machining amplitude rolling mill for the third thread or spline rolling. the International Journal of advanced manufacturing Technology,2019,100: 391-; however, in the multi-die roll forming of the internal gear, the internal thread, the external gear and the external thread, the phase requirements of the dies are different, and the roll die phase adjustment of the external complex profile (the external gear and the external thread) cannot be used for the roll die phase adjustment of the internal complex profile (the internal gear and the internal thread).
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a multi-die synchronous roll forming method for large-diameter internal tooth profile parts, which is suitable for complex internal tooth profile parts with an inner diameter of more than 100mm, particularly more than 1000mm, can effectively reduce forming force, reduce equipment load, ensure accurate meshing in the forming process of the internal tooth profile parts and ensure roundness precision of the external diameter of the internal tooth profile parts.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a large-diameter inner tooth type multi-die synchronous roll forming method comprises the following steps:
step 1, clamping a workpiece blank 1, wherein the workpiece blank 1 is driven by a turntable 4, and if the diameter of the workpiece blank is larger than 5000mm, the workpiece blank 1 is driven by a plurality of double-toothed roller mechanisms; the central axis of the workpiece blank 1 is superposed with the central axis of the turntable 4 or the central axes of the plurality of uniformly distributed double-tooth rollers; the workpiece blank is axially divided into a forming section and a clamping driving section, and the outer diameter of the workpiece blank is Rb(ii) a The forming section is the area formed by the internal tooth profile and has an inner diameter of
Height of H1The two ends of the inner diameter are provided with chamfers L1(ii) a The clamping driving section drives the workpiece blank 1 to rotate, and the inner diameter of the workpiece blank
Greater than or equal to the inner diameter of the forming section
Height of H2；
Step 2, N pairs of identical rolling dies are uniformly arranged along the circumferential direction of the workpiece blank 1, wherein N is 2-8, each pair of rolling dies is divided into an inner roller die and an outer roller die which are matched with each other inside and outside, the inner roller die is a tooth-shaped die, and the outer roller die is a cylindrical die; adjusting the positions of the inner roller die and the outer roller die to enable the axes of the inner roller die and the outer roller die to be parallel to the axis of the workpiece blank 1; adjusting the axial feeding of the outer roller die and the inner roller die to a specified position, and enabling the centers of the outer roller die and the inner roller die and the center of the forming section of the workpiece blank 1 to be on the same horizontal plane when the outer roller die and the inner roller die reach the specified position;
step 3, the height of each outer roller die is HoutRadius routAdjusting the contact of the outer roller die and the outer surface of the workpiece blank 1, wherein the center distance between the outer roller die and the workpiece blank 1 is aoutWherein a isout＝rout+Rb；
if the formed internal tooth profile part is of an internal thread structure, the internal roller die is of a thread structure, and the pitch diameter of the threads is d2The number of heads is ninLead of s and profile angle of α2The height of the thread is
Wherein
The rotation direction is determined by the rotation direction of the formed internal thread; adjusting the crest of an inner roller die to be in contact with the inner diameter of a forming section of the workpiece blank 1, wherein the center distance between the inner roller die and the workpiece blank 1 is
Wherein
The diameter is the large diameter of the inner roller die;
step 5, uniformly arranging N identical inner roller dies at equal intervals along the circumferential direction of the workpiece blank 1, wherein the naming direction of the serial number is the same as the rotating direction of the workpiece blank 1 in the rolling process, and adjusting the phase relationship of the N inner roller dies, wherein the phase relationship is determined according to the number N of the inner roller dies and the structures and parameters of the formed workpiece and the inner roller dies; if the inner roller dies are in a gear or spline structure, the N inner roller dies are staggered by an angle along the rotation direction of the workpiece blank 1s,
ZwThe number of teeth of the formed annular gear; if the inner roller dies are in a threaded structure, the N inner roller dies are staggered by an angle along the rotation direction of the workpiece blank 1t,
nwThe method for specifically adjusting the phase of each inner roller die for the number of formed internal thread heads is as follows:
when the inner roller mold is in a gear or spline structure, the first inner roller mold 201sHas a phase adjustment angle of
First of allInner roller mold 201sFixing; second inner roller die 202sThe angle of the workpiece blank 1 is adjusted to
Third inner roller mold 203sThe angle of the workpiece blank 1 is adjusted to
Jth inner roll mold 20jsThe angle of the workpiece blank 1 is adjusted to
Nth inner roll mold 20NsThe angle of the workpiece blank 1 is adjusted to
When the inner roller mold is a screw structure, the first inner roller mold 201tHas a phase adjustment angle of
First inner roller mold 201tFixing; second inner roller die 202tAdjusted along the rotation direction of the workpiece blank 1The whole angle is
Third inner roller mold 203tThe angle of the workpiece blank 1 is adjusted to
Jth inner roll mold 20jtThe angle of the workpiece blank 1 is adjusted to
Nth inner roll mold 20NtThe angle of the workpiece blank 1 is adjusted to
Step 6, the turntable 4 or the double-gear mechanism drives the workpiece blank 1 to rotate at an angular speed omega; n inner roller dies synchronously and radially feed at a speed V and rotate along with the workpiece blank 1 through friction and tooth-shaped meshing to finish the plastic forming of the tooth shape on the workpiece blank 1; the N outer roller dies are axially fixed and only rotate by friction with the workpiece blank 1;
and 7, the N inner roller molds radially reach the designated positions, and the feeding is completed: when the workpiece reaches the designated position, if the forming piece is the inner gear ring, the center distance between the inner roller die and the workpiece blank 1 is
Wherein
Wherein
The diameter of the root circle of the formed ring gear,
the diameter of the addendum circle of the inner roller mold; if the formed part is an internal thread, the center distance between the inner roller die and the workpiece blank 1 is
Wherein
The minor diameter of the formed internal thread,
the diameter is the large diameter of the inner roller die; after the feeding is finished, the turntable 4 drives the workpiece blank 1 to continue rotating, and drives the inner roller die and the outer roller die to rotate automatically, so that the tooth profile finishing of the workpiece blank 1 is realized; then the rotating disc 4 stops rotating, and the forming is finished;
and 8, slightly relieving the cutter of the inner roller die inwards along the radial direction of the finally formed workpiece, slightly relieving the cutter of the outer roller die outwards along the radial direction, and discharging.
The invention has the beneficial effects that:
the invention can realize the tooth profile forming of the large-diameter internal tooth profile part, and the local plastic processing is carried out on the workpiece blank by using the plastic forming mode of a plurality of pairs of rolling dies, thereby effectively reducing the forming force and reducing the equipment load; the workpiece blank rotates actively, and the inner roller die rotates passively, so that accurate meshing in the inner gear ring forming process is ensured; the outer roller mold is axially fixed and only passively rotates, so that the roundness precision of the outer diameter of the inner gear ring can be ensured.
Drawings
FIG. 1 is a schematic diagram of the positions of a workpiece blank and a die in example 1 of the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a schematic diagram of the positions of the workpiece blank and the die in embodiment 2 of the invention.
Fig. 4 is a cross-sectional view of fig. 3.
Detailed Description
The invention is described below with reference to the accompanying drawings and examples.
Embodiment 1, a large-diameter internal-tooth-type multi-die synchronous roll forming method includes the steps of:
step 1, referring to fig. 1 and fig. 2, clamping a workpiece blank 1, wherein the workpiece blank 1 is driven by a turntable 4 (if the diameter is too large (greater than 5000mm), the workpiece blank 1 can be driven by a plurality of double-toothed roller mechanisms), and the central axis of the workpiece blank 1 is superposed with the central axis of the turntable 4 or the central axes of a plurality of uniformly distributed double-toothed rollers; the workpiece blank 1 is axially divided into a forming section and a clamping driving section, and the outer diameter of the workpiece blank is Rb(ii) a The forming section is the area formed by the internal tooth profile and has an inner diameter of
Height of H1Simultaneously, in order to facilitate feeding and forming, chamfers L are processed at two ends of the inner diameter1(ii) a The clamping driving section has no plastic deformation, is convenient for the clamping of a clamp on the turntable 4 or the double-gear mechanism and drives the workpiece blank 1 to rotate, and the inner diameter of the clamping driving section
Greater than or equal to the inner diameter of the forming section
Height of H2；
Step 2, uniformly arranging N (2-8) pairs of identical rolling dies along the circumferential direction of the workpiece blank 1, wherein each pair of rolling dies is divided into an inner roller die and an outer roller die which are matched with each other inside and outside, wherein the inner roller die is a tooth-shaped die, and the outer roller die is a cylindrical die; adjusting inner rollerThe position of the mould and the outer roller mould is that the axes of the mould and the outer roller mould are parallel to the axis of the workpiece blank 1; adjusting the axial feeding of the outer roller die and the inner roller die to a specified position, and enabling the centers of the outer roller die and the inner roller die and the center of the forming section of the workpiece blank 1 to be on the same horizontal plane when the outer roller die and the inner roller die reach the specified position; in the present embodiment, N is 3, and the first inner roll mold 201sWith a first outer roller mold 301 and a second inner roller mold 202sWith a second outer roller mold 302 and a third inner roller mold 203sIs matched with a third outer roller mould 303 for use;
step 3, the height of each outer roller die is HoutRadius routAdjusting the outer roller die to be in contact with the outer surface of the workpiece blank 1, wherein the center distance between the outer roller die and the workpiece blank 1 is aoutWherein a isout＝rout+Rb；
step 5, uniformly arranging N identical inner roller dies at equal intervals along the circumferential direction of the workpiece blank 1, wherein the naming direction of the serial number is the same as the rotating direction of the workpiece blank 1 in the rolling process, and adjusting the phase relationship of the N inner roller dies, wherein the phase relationship is determined according to the number N of the inner roller dies, and the structures and parameters of the formed workpiece and the inner roller dies; n inner roller dies are staggered by an angle along the rotation direction of the workpiece blank 1s,
ZwThe method for specifically adjusting the phase of each inner roller die for the tooth number of the formed inner gear ring is as follows:
first inner roller mold 201sHas a phase adjustment angle of
First inner roller mold 201sFixing; second inner roller die 202sThe angle of the workpiece blank 1 is adjusted to
Third inner roller mold 203sThe angle of the workpiece blank 1 is adjusted to
Jth inner roll mold 20jsThe angle of the workpiece blank 1 is adjusted to
Nth inner rollerMold 20NsThe angle of the workpiece blank 1 is adjusted to
Step 6, the turntable 4 or the double-gear mechanism drives the workpiece blank 1 to rotate at an angular speed omega; n inner roller dies synchronously and radially feed at a speed V and rotate along with the workpiece blank 1 through friction and tooth-shaped meshing to finish the plastic forming of the tooth shape on the workpiece blank 1; the N outer roller dies are axially fixed and only rotate by friction with the workpiece blank 1;
and 7, the N inner roller molds 2 radially reach the designated positions, and the feeding is completed: when the workpiece blank reaches the designated position, the center distance between the inner roller die and the workpiece blank 1 is
Wherein
Wherein
The diameter of the root circle of the formed ring gear,
the diameter of the addendum circle of the inner roller mold; after the feeding is finished, the turntable 4 drives the workpiece blank 1 to continue rotating, and drives the inner roller die and the outer roller die to rotate automatically, so that the tooth profile finishing of the workpiece blank 1 is realized; then the rotating disc 4 stops rotating, and the forming is finished;
and 8, slightly relieving the cutter of the inner roller die inwards along the radial direction of the finally formed workpiece, slightly relieving the cutter of the outer roller die outwards along the radial direction, and discharging.
Embodiment 2, a method for large-diameter internal-tooth multi-die synchronous roll forming, comprising the steps of:
step 1, referring to fig. 3 and 4, clamping a workpiece blank 1, wherein the workpiece blank 1 is driven by a turntable 4 (if the diameter is too large (greater than 5000mm), the workpiece blank 1 can be driven by a plurality of double-toothed roller mechanisms), and the central axis of the workpiece blank 1 is superposed with the central axis of the turntable 4 or the central axes of a plurality of uniformly distributed double-toothed rollers; the workpiece blank 1 is axially divided into a forming section and a clamping driving section, and the outer diameter of the workpiece blank is Rb(ii) a The forming section is the area formed by the internal tooth profile and has an inner diameter of
Height of H1Simultaneously, in order to facilitate feeding and forming, chamfers L are processed at two ends of the inner diameter1(ii) a The clamping driving section has no plastic deformation, is convenient for the clamping of a clamp on the turntable 4 or the double-gear mechanism and drives the workpiece blank 1 to rotate, and the inner diameter of the clamping driving section
Greater than or equal to the inner diameter of the forming section
Height of H2；
Step 2, uniformly arranging N (2-8) pairs of identical rolling dies along the circumferential direction of the workpiece blank 1, wherein each pair of rolling dies is divided into an inner roller die and an outer roller die which are matched with each other inside and outside, wherein the inner roller die is a tooth-shaped die, and the outer roller die is a cylindrical die; adjusting the positions of the inner roller die and the outer roller die to enable the axes of the inner roller die and the outer roller die to be parallel to the axis of the workpiece blank 1; adjusting the axial feeding of the outer roller die and the inner roller die to a specified position, and enabling the centers of the outer roller die and the inner roller die and the center of the forming section of the workpiece blank 1 to be on the same horizontal plane when the outer roller die and the inner roller die reach the specified position; in the present embodiment, N is 3, and the first inner roll mold 201tWith a first outer roller mold 301 and a second inner roller mold 202tA second outer roller die 302 and a third inner roller die 203tIs matched with a third outer roller mould 303 for use;
step 3, the height of each outer roller die is HoutRadius routAdjusting the outer roll mold and the workpiece blankThe outer surface of the material 1 is contacted, and the center distance between the outer roller die and the workpiece blank 1 is aoutWherein a isout＝rout+Rb；
step 5, uniformly arranging N identical inner roller dies at equal intervals along the circumferential direction of the workpiece blank 1, wherein the naming direction of the serial number is the same as the rotating direction of the workpiece blank 1 in the rolling process, and adjusting the phase relationship of the N inner roller dies, wherein the phase relationship is determined according to the number N of the inner roller dies, and the structures and parameters of the formed workpiece and the inner roller dies; n inner roller dies are staggered by an angle along the rotation direction of the workpiece blank 1t,
nwThe method for specifically adjusting the phase of each inner roller die for the number of formed internal thread heads is as follows:
first inner roller mold 201tHas a phase adjustment angle of
First inner roller mold 201tFixing; second inner roller die 202tThe angle of the workpiece blank 1 is adjusted to
Third inner roller mold 203tThe angle of the workpiece blank 1 is adjusted to
Jth inner roll mold 20jtThe angle of the workpiece blank 1 is adjusted to
Nth inner roll mold 20NtThe angle of the workpiece blank 1 is adjusted to
Step 6, the turntable 4 or the double-gear mechanism drives the workpiece blank 1 to rotate at an angular speed omega; n inner roller dies synchronously and radially feed at a speed V and rotate along with the workpiece blank through friction and tooth-shaped meshing to finish the plastic forming of the tooth shape on the workpiece blank; the N outer roller dies are axially fixed and only rotate through friction with workpiece blanks;
and 7, the N inner roller molds radially reach the designated positions, and the feeding is completed: reaching the designated position, the center distance between the inner roller die and the workpiece blank is
Wherein
The minor diameter of the formed internal thread,
the diameter is the large diameter of the inner roller die; after the feeding is finished, the turntable 4 drives the workpiece blank 1 to continue rotating, and drives the inner roller die and the outer roller die to rotate automatically, so that the tooth profile finishing of the workpiece blank 1 is realized; then the rotating disc 4 stops rotating, and the forming is finished;
and 8, slightly relieving the cutter of the inner roller die inwards along the radial direction of the finally formed workpiece, slightly relieving the cutter of the outer roller die 3 outwards along the radial direction, and discharging.
Claims (1)
1. A large-diameter inner tooth type multi-die synchronous rolling forming method is characterized by comprising the following steps:
step 1, clamping a workpiece blank (1), wherein the workpiece blank (1) is driven by a turntable (4), and if the diameter of the workpiece blank is larger than 5000mm, the workpiece blank (1) is driven by a plurality of double-geared roller mechanisms; the central axis of the workpiece blank (1) is superposed with the central axis of the turntable (4) or the central axes of the uniformly distributed double-tooth rollers; the workpiece blank is axially divided into a forming section and a clamping driving section, and the outer diameter of the workpiece blank is Rb(ii) a The forming section is the area formed by the internal tooth profile and has an inner diameter of
Height of H1The two ends of the inner diameter are provided with chamfers L1(ii) a The clamping driving section drives the workpiece blank (1) to rotate, and the inner diameter of the clamping driving section
Greater than or equal to the inner diameter of the forming section
Height of H2；
Step 2, N pairs of identical rolling dies are uniformly arranged along the circumferential direction of the workpiece blank (1), N is 2-8, each pair of rolling dies is divided into an inner roller die and an outer roller die which are matched with each other inside and outside, wherein the inner roller die is a tooth-shaped die, and the outer roller die is a cylindrical die; adjusting the positions of the inner roller die and the outer roller die to enable the axes of the inner roller die and the outer roller die to be parallel to the axis of the workpiece blank (1); adjusting the axial feeding of the outer roller die and the inner roller die to a specified position, and enabling the centers of the outer roller die and the inner roller die and the center of the forming section of the workpiece blank (1) to be on the same horizontal plane when the outer roller die and the inner roller die reach the specified position;
step 3, the height of each outer roller die is HoutRadius routThe outer roller die is adjusted to be in contact with the outer surface of the workpiece blank (1), and the center distance between the outer roller die and the workpiece blank (1) is aoutWherein a isout＝rout+Rb；
Step 4, adjusting the centers of each pair of inner roller die and outer roller die to be on the same straight line with the center of the workpiece blank (1); each inner roller die has a height HinThe tooth profile is determined by the tooth profile of the formed part;
if the formed internal tooth profile part is in an internal gear ring structure, the internal roller die is in a gear or spline structure, and the number of teeth is ZinThe modulus is m and is determined by the modulus of the formed ring gear, and the reference circle pressure angle is α1The tooth height is determined by the pressure angle of the formed inner gear ring
Wherein h isinThe tooth height of final forming is more than or equal to; before adjustmentThe tooth top of the inner roller die is contacted with the inner diameter of the forming section of the workpiece blank (1), and the center distance between the inner roller die and the workpiece blank (1) is
Wherein
The diameter of the addendum circle of the inner roller mold;
if the formed internal tooth profile part is of an internal thread structure, the internal roller die is of a thread structure, and the pitch diameter of the threads is d2The number of heads is ninLead of s and profile angle of α2The height of the thread is
Wherein
The rotation direction is determined by the rotation direction of the formed internal thread; adjusting the crest of the inner roller die to be in contact with the inner diameter of the forming section of the workpiece blank (1), wherein the center distance between the inner roller die and the workpiece blank (1) is
Wherein
The diameter is the large diameter of the inner roller die;
step 5, uniformly arranging N identical inner roller dies at equal intervals along the circumferential direction of the workpiece blank (1), wherein the naming direction of the serial number is the same as the rotating direction of the workpiece blank (1) in the rolling process, and adjusting the phase relationship of the N inner roller dies, wherein the phase relationship is determined according to the number N of the inner roller dies, and the structures and parameters of the formed workpiece and the inner roller dies;
if the inner roller dies are in a gear or spline structure, the N inner roller dies are staggered with each other along the rotation direction of the workpiece blank (1)Opening angles,
ZwThe number of teeth of the formed annular gear; if the inner roller dies are in a threaded structure, the N inner roller dies are mutually staggered by an angle along the rotation direction of the workpiece blank (1)t,
nwThe method for specifically adjusting the phase of each inner roller die for the number of formed internal thread heads is as follows:
when the inner roller dies are in a gear or spline structure, the first inner roller die (201)s) Has a phase adjustment angle of
A first inner roller die (201)s) Fixing; a second inner roller die (202)s) The angle is adjusted along the rotation direction of the workpiece blank (1) to
A third inner roller die (203)s) The angle is adjusted along the rotation direction of the workpiece blank (1) to
Jth inner roller die (20 j)s) The angle is adjusted along the rotation direction of the workpiece blank (1) to
j is 2, … N; nth inner roller die (20N)s) The angle is adjusted along the rotation direction of the workpiece blank (1) to
When the inner roller dies are in a threaded structure, the first inner roller die (201)t) Has a phase adjustment angle of
A first inner roller die (201)t) Fixing; a second inner roller die (202)t) The angle is adjusted along the rotation direction of the workpiece blank (1) to
A third inner roller die (203)t) The angle is adjusted along the rotation direction of the workpiece blank (1) to
Jth inner roller die (20 j)t) The angle is adjusted along the rotation direction of the workpiece blank (1) to
j is 2, … N; nth inner roller die (20N)t) The angle is adjusted along the rotation direction of the workpiece blank (1) to
Step 6, driving the workpiece blank (1) to rotate at an angular speed omega by the turntable (4) or the double-geared roller mechanism; n inner roller dies synchronously and radially feed at a speed V and rotate along with the workpiece blank (1) through friction and tooth-shaped meshing to finish the plastic forming of the tooth shape on the workpiece blank (1); the N outer roller dies are axially fixed and only rotate through friction with the workpiece blank (1);
and 7, the N inner roller molds radially reach the designated positions, and the feeding is completed: when the workpiece reaches the designated position, if the forming piece is the inner gear ring, the center distance between the inner roller die and the workpiece blank (1) is
Wherein
Wherein
The diameter of the root circle of the formed ring gear,
the diameter of the addendum circle of the inner roller mold; if the formed part is an internal thread, the center distance between the inner roller die and the workpiece blank (1) is
Wherein
The minor diameter of the formed internal thread,
the diameter is the large diameter of the inner roller die; after the feeding is finished, the turntable (4) drives the workpiece blank (1) to continue rotating, and drives the inner roller die and the outer roller die to rotate automatically, so that the tooth profile finishing of the workpiece blank (1) is realized; then the rotating disc (4) stops rotating, and the forming is finished;
and 8, slightly relieving the cutter of the inner roller die inwards along the radial direction of the finally formed workpiece, slightly relieving the cutter of the outer roller die outwards along the radial direction, and discharging.
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| CN201911054918.3A CN110814239B (en) | 2019-10-31 | 2019-10-31 | Multi-die synchronous rolling forming method for large-diameter internal tooth profile |
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| CN201911054918.3A CN110814239B (en) | 2019-10-31 | 2019-10-31 | Multi-die synchronous rolling forming method for large-diameter internal tooth profile |
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| CN110814239B true CN110814239B (en) | 2020-08-25 |
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| US4020758A (en) * | 1974-02-25 | 1977-05-03 | Diehl Datensysteme G.M.B.H | Type carrier arrangement for roller printing |
| CN100372626C (en) * | 2003-07-25 | 2008-03-05 | 株式会社Mh中心 | Method of manufacturing part with internal gear and rolling machine |
| CN1267613C (en) * | 2004-06-10 | 2006-08-02 | 丁方儒 | Multihead threading reinforcing bar joint, producer and producing method thereof |
| JP2014228102A (en) * | 2013-05-24 | 2014-12-08 | 本田技研工業株式会社 | Continuously variable transmission |
| CN107755448A (en) * | 2017-07-08 | 2018-03-06 | 嘉兴大道锻造技术咨询有限公司 | A kind of ring gear mould and forming method |
| CN109759527B (en) * | 2019-03-05 | 2020-07-10 | 西安交通大学 | Multi-pass simultaneous rolling die and method for large-diameter tooth-shaped piece |
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2019
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Effective date of registration: 20230802 Address after: Room 1035, 1st Floor, JuGou Hongde Building, No. 20, West China Innovation Port, Fengxi New City, Xixian New District, Xi'an City, Shaanxi Province, 712046 Patentee after: Shaanxi Gezhi Jingcheng Intelligent Manufacturing Co.,Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |