CN110961507B - Spline cold-forging tool for high-strength torsion shaft - Google Patents
Spline cold-forging tool for high-strength torsion shaft Download PDFInfo
- Publication number
- CN110961507B CN110961507B CN201911283002.5A CN201911283002A CN110961507B CN 110961507 B CN110961507 B CN 110961507B CN 201911283002 A CN201911283002 A CN 201911283002A CN 110961507 B CN110961507 B CN 110961507B
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- cold
- forging
- wheel
- beating
- contact part
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- 238000010273 cold forging Methods 0.000 title claims abstract description 77
- 238000010009 beating Methods 0.000 claims abstract description 79
- 229910001315 Tool steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention provides a spline cold-forging tool for a high-strength torsion shaft, which comprises a cold-forging wheel and clamping positioning shafts symmetrically distributed on two sides of the cold-forging wheel; the cold beating wheel comprises a cold beating contact part of the cold beating wheel, a first non-cold beating contact part of the cold beating wheel, a second non-cold beating contact part of the cold beating wheel and a third non-cold beating contact part of the cold beating wheel. The cold forging tool adopts an integrated design, so that the clamping and positioning precision of the cold forging wheel can be ensured; the arc transition design of the cold forging wheel part can increase the strength of the cold forging wheel part and prolong the service life of the cold forging working part of the cold forging wheel.
Description
Technical Field
The invention belongs to the technical field of mechanical processing equipment, and particularly relates to a spline cold-forging tool for a high-strength torsion shaft.
Background
The high-strength torsion shaft is made of low-alloy ultrahigh-strength steel 45CrNiMoVA material, the shaft end external spline processing technology adopts a cold-forging forming technology, and the cold-forging wheel part is utilized to quickly hit the surface of a part, so that plastic deformation is generated on the surface of a workpiece, and the forming of the spline profile of the workpiece is realized.
Because the high-strength torsion shaft spline has higher precision requirement, the cold-forging wheel adopts an integrated design to reduce the accumulated error of equipment and ensure that the contact part is concentric with the shaft part positioned by clamping. In addition, the spline is hit simultaneously by adopting the pair of cold-forging wheels, so that the shaft ends can be stressed symmetrically at the same time, the shaft end clamping precision in the machining process is guaranteed, and the spline cold-forging machining precision is guaranteed to the greatest extent. The contour of the cold-forging contact part of the cold-forging wheel is consistent with the design requirement of the involute spline contour of the workpiece.
In order to improve the service life of the cold beating wheel and reduce the cutter cost, a spline cold beating tool for a high-strength torsion shaft is required to be provided, and the tool not only can realize the rapid machining and forming of the high-precision torsion shaft external spline, but also can improve the service life of the cold beating tool and reduce the manufacturing cost.
Disclosure of Invention
First, the technical problem to be solved
The invention provides a spline cold-forging tool for a high-strength torsion shaft, which aims to solve the technical problem of how to improve the service life of a cutter while ensuring the processing precision requirement of a spline.
(II) technical scheme
In order to solve the technical problems, the invention provides a spline cold-forging tool for a high-strength torsion shaft, which comprises a cold-forging wheel and clamping positioning shafts symmetrically distributed on two sides of the cold-forging wheel; the cold beating wheel comprises a cold beating contact part of the cold beating wheel, a first non-cold beating contact part of the cold beating wheel, a second non-cold beating contact part of the cold beating wheel and a third non-cold beating contact part of the cold beating wheel; wherein,
The cold-beating contact part of the cold-beating wheel is consistent with the spline tooth shape of the torsion shaft to be processed; the first non-cold-forging contact part of the cold-forging wheel extends to a first tooth thickness along the involute of the cold-forging contact part; the second non-cold-forging contact part of the cold-forging wheel takes the arc tangent point of the projection position of the first tooth thickness as the initial end, transits to the second tooth thickness along the arc, transits to the third tooth thickness along the arc by the arc tangent point of the projection position of the second tooth thickness, and transits to the third tooth thickness from two continuous tangential arcs in advance to increase the tooth thickness and improve the strength of the tooth part; and the initial end of the contour curve of the third non-cold-beating contact part of the cold beating wheel takes the projection position of the third tooth thickness as a tangent point, and extends along the arc tangent line until the initial end of the contour curve is connected with the arc tool retracting groove at the tail end of the clamping and positioning shaft.
Further, cr12MoV tool steel is selected as a material of the cold forging tool.
Further, the dimensional error from the end surfaces of the two clamping positioning shafts to the center of the cold-beating contact part is not more than 0.015mm.
Further, the surface roughness Ra of the cold-pressed contact portion is not more than 0.1 μm.
(III) beneficial effects
The invention provides a spline cold-forging tool for a high-strength torsion shaft, which comprises a cold-forging wheel and clamping positioning shafts symmetrically distributed on two sides of the cold-forging wheel; the cold beating wheel comprises a cold beating contact part of the cold beating wheel, a first non-cold beating contact part of the cold beating wheel, a second non-cold beating contact part of the cold beating wheel and a third non-cold beating contact part of the cold beating wheel; wherein the cold-beating contact part of the cold-beating wheel is consistent with the spline tooth form of the torsion shaft to be processed; the first non-cold-forging contact part of the cold-forging wheel extends to a first tooth thickness along the involute of the cold-forging contact part; the second non-cold-forging contact part of the cold-forging wheel takes the arc tangent point of the projection position of the first tooth thickness as the initial end, transits to the second tooth thickness along the arc, transits to the third tooth thickness along the arc by the arc tangent point of the projection position of the second tooth thickness, and transits to the third tooth thickness from two continuous tangential arcs in advance to increase the tooth thickness and improve the strength of the tooth part; and the initial end of the contour curve of the third non-cold-beating contact part of the cold beating wheel takes the projection position of the third tooth thickness as a tangent point, and extends along the arc tangent line until the initial end of the contour curve is connected with the arc tool retracting groove at the tail end of the clamping and positioning shaft.
The cold forging tool adopts an integrated design, and can ensure the clamping and positioning precision of the cold forging wheel relative to a split design; the arc transition design of the cold forging wheel part can increase the strength of the cold forging wheel part and prolong the service life of the cold forging working part of the cold forging wheel.
Drawings
FIG. 1 is a schematic diagram of a spline cold-forging process;
Fig. 2 is a schematic view of a cold-forging wheel according to an embodiment of the invention.
Detailed Description
To make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be given with reference to the accompanying drawings and examples.
The principle of the spline cold-forging processing method is shown in fig. 1. During cold forging, the torsion shaft 2 is horizontally arranged on cold forging equipment and performs circumferential anticlockwise rotation and axial Z-direction feeding; the cold beating wheel 1 is arranged on the tool rotating shaft 3, and the cold beating wheel 1 can freely rotate along the axis of the cold beating wheel 1; the tool rotating shafts 3 move to a feed preparation position close to the torsion shafts 2 at random, the machine tool control system controls the two tool rotating shafts 3 to rotate, the outer rotating shafts rotate anticlockwise, the inner rotating shafts rotate clockwise, the cold beating wheels 1 are driven to move when the rotating shafts rotate, when the two cold beating wheels 1 are close to the torsion shafts 2, the wheel parts of the pair of cold beating wheels 1 strike the torsion shafts 2 at the same time, and each time the rotating shafts rotate for 360 degrees, the striking is carried out; the main shaft drives the torsion shaft 2 to rotate by 360 degrees/z (z is the number of spline teeth) under the control of the control system when the cold beating wheel 1 strikes the torsion shaft 2 once; meanwhile, the torsion shaft 2 carries out Z-direction feeding according to the feeding speed of 52mm/min until all tooth profiles are processed.
The embodiment provides a spline cold-forging tool for a high-strength torsion shaft for the spline cold-forging processing, and the structure of the tool is shown in fig. 2. The spline cold-forging tool comprises a cold-forging wheel and clamping positioning shafts 4 symmetrically distributed on two sides of the cold-forging wheel. The cold beating wheel comprises a cold beating wheel cold beating contact part 5, a cold beating wheel first non-cold beating contact part 6, a cold beating wheel second non-cold beating contact part 7 and a cold beating wheel third non-cold beating contact part 8. The working part is a cold-beating wheel cold-beating contact part 5, and the structural design of a cold-beating wheel first non-cold-beating contact part 6, a cold-beating wheel second non-cold-beating contact part 7 and a cold-beating wheel third non-cold-beating contact part 8 is used for guaranteeing the structural strength of the cold-beating wheel and is convenient for processing a positioning shaft.
The cold-beating contact part 5 of the cold-beating wheel is consistent with the spline tooth shape of the torsion shaft to be processed; the first non-cold-forging contact part 6 of the cold-forging wheel extends to a first tooth thickness B along the involute of the cold-forging contact part 5; the second non-cold-forging contact part 7 of the cold-forging wheel takes the arc tangent point of the projection position of the first tooth thickness B as the initial end, transits to the second tooth thickness B1 along the arc, transits to the third tooth thickness B2 along the arc by the arc tangent point of the projection position of the second tooth thickness B1, and the second non-cold-forging contact part 7 of the cold-forging wheel transits to the third tooth thickness B2 from two continuous tangential arcs in advance to increase the tooth thickness and improve the strength of the tooth part; the initial end of the contour curve of the third non-cold-beating contact part 8 of the cold-beating wheel takes the projection position of the third tooth thickness B2 as a tangent point, and extends along the arc tangent line until being connected with the arc tool retracting groove 9 at the tail end of the clamping and positioning shaft.
The cold forging tool is made of Cr12MoV tool steel, and the dimensional error from the end surfaces of the two clamping positioning shafts 4 to the center of the cold forging contact part is not more than 0.015mm; the surface roughness Ra of the cold-beating contact part is not more than 0.1 mu m.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (2)
1. The spline cold-forging tool for the high-strength torsion shaft is characterized by comprising a cold-forging wheel and clamping positioning shafts symmetrically distributed on two sides of the cold-forging wheel; the cold beating wheel comprises a cold beating wheel cold beating contact part, a cold beating wheel first non-cold beating contact part, a cold beating wheel second non-cold beating contact part and a cold beating wheel third non-cold beating contact part; wherein,
The cold-forging contact part of the cold-forging wheel is consistent with the spline tooth form of the torsion shaft to be processed; the first non-cold-forging contact part of the cold-forging wheel extends to a first tooth thickness along the involute of the cold-forging contact part; the second non-cold-forging contact part of the cold-forging wheel takes the arc tangent point of the projection position of the first tooth thickness as the initial end, transits to the second tooth thickness along the arc, transits to the third tooth thickness along the arc by the arc tangent point of the projection position of the second tooth thickness, and transits to the third tooth thickness from two continuous tangential arcs in advance to increase the tooth thickness, thereby improving the strength of the tooth part; the initial end of the contour curve of the third non-cold-forging contact part of the cold-forging wheel takes the projection position of the third tooth thickness as a tangent point, and extends along the arc tangent line until the initial end of the contour curve is connected with the arc tool retracting groove at the tail end of the clamping and positioning shaft; the dimensional error from the end surfaces of the two clamping positioning shafts to the center of the cold-forging contact part is not more than 0.015mm; the surface roughness Ra of the cold-beating contact part is not more than 0.1 mu m.
2. The cold-forging tool as recited in claim 1, wherein a material of the cold-forging tool is Cr12MoV tool steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283002.5A CN110961507B (en) | 2019-12-13 | 2019-12-13 | Spline cold-forging tool for high-strength torsion shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911283002.5A CN110961507B (en) | 2019-12-13 | 2019-12-13 | Spline cold-forging tool for high-strength torsion shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110961507A CN110961507A (en) | 2020-04-07 |
| CN110961507B true CN110961507B (en) | 2024-06-11 |
Family
ID=70034339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911283002.5A Active CN110961507B (en) | 2019-12-13 | 2019-12-13 | Spline cold-forging tool for high-strength torsion shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110961507B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4268948A (en) * | 1978-02-28 | 1981-05-26 | British Steel Corp. | Parting device |
| KR200395452Y1 (en) * | 2005-06-13 | 2005-09-14 | 한국오에스지 주식회사 | Rolling dies for drive shaft processing |
| DE102004046427A1 (en) * | 2004-09-24 | 2006-04-06 | Universität Kassel | Internal shaping tool has shaft carrying conical working head with curved surface forming ellipse |
| CN1791687A (en) * | 2003-03-18 | 2006-06-21 | 宾夕法尼亚州研究基金会 | Method and apparatus for strengthening of powder metal gears by ausforming |
| EP2529851A1 (en) * | 2011-06-01 | 2012-12-05 | Caradon Stelrad B.V. | Roll-formed convector sheet |
| CN111183717B (en) * | 2012-07-18 | 2014-10-22 | 北京北方车辆集团有限公司 | Rolling tool for torsion shaft |
| CN104607520A (en) * | 2015-01-16 | 2015-05-13 | 西北工业大学 | Spinning mechanism and method for forming corrugated pipe |
| CN108246941A (en) * | 2016-12-29 | 2018-07-06 | 财团法人金属工业研究发展中心 | Gear molding device and manufacturing method thereof |
| CN211757832U (en) * | 2019-12-13 | 2020-10-27 | 北京北方车辆集团有限公司 | High strength is spline cold instrument of beating for torsion shaft |
-
2019
- 2019-12-13 CN CN201911283002.5A patent/CN110961507B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4268948A (en) * | 1978-02-28 | 1981-05-26 | British Steel Corp. | Parting device |
| CN1791687A (en) * | 2003-03-18 | 2006-06-21 | 宾夕法尼亚州研究基金会 | Method and apparatus for strengthening of powder metal gears by ausforming |
| DE102004046427A1 (en) * | 2004-09-24 | 2006-04-06 | Universität Kassel | Internal shaping tool has shaft carrying conical working head with curved surface forming ellipse |
| KR200395452Y1 (en) * | 2005-06-13 | 2005-09-14 | 한국오에스지 주식회사 | Rolling dies for drive shaft processing |
| EP2529851A1 (en) * | 2011-06-01 | 2012-12-05 | Caradon Stelrad B.V. | Roll-formed convector sheet |
| CN111183717B (en) * | 2012-07-18 | 2014-10-22 | 北京北方车辆集团有限公司 | Rolling tool for torsion shaft |
| CN104607520A (en) * | 2015-01-16 | 2015-05-13 | 西北工业大学 | Spinning mechanism and method for forming corrugated pipe |
| CN108246941A (en) * | 2016-12-29 | 2018-07-06 | 财团法人金属工业研究发展中心 | Gear molding device and manufacturing method thereof |
| CN211757832U (en) * | 2019-12-13 | 2020-10-27 | 北京北方车辆集团有限公司 | High strength is spline cold instrument of beating for torsion shaft |
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| Publication number | Publication date |
|---|---|
| CN110961507A (en) | 2020-04-07 |
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