CN110961507A - High strength is spline cold instrument of beating for torsion shaft - Google Patents
High strength is spline cold instrument of beating for torsion shaft Download PDFInfo
- Publication number
- CN110961507A CN110961507A CN201911283002.5A CN201911283002A CN110961507A CN 110961507 A CN110961507 A CN 110961507A CN 201911283002 A CN201911283002 A CN 201911283002A CN 110961507 A CN110961507 A CN 110961507A
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- wheel
- beating
- contact part
- forging
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- 238000010009 beating Methods 0.000 title claims abstract description 78
- 238000010273 cold forging Methods 0.000 claims abstract description 63
- 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
- 238000013461 design Methods 0.000 abstract description 6
- 230000007704 transition Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 description 6
- 238000000034 method 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
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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Classifications
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- 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 and 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. The cold forging tool is designed in an integrated mode, so that the clamping and positioning accuracy of the cold forging wheel can be guaranteed; the circular 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 machining process equipment, and particularly relates to a cold forging tool for a spline of a high-strength torsion shaft.
Background
The high-strength torsion shaft is made of a low-alloy ultrahigh-strength steel 45CrNiMoVA material, the cold forging forming technology is adopted in the shaft end external spline machining process, the cold forging wheel part is utilized to quickly strike the surface of a part, and then the surface of a workpiece is caused to generate plastic deformation, so that the forming of the spline profile of the workpiece is realized.
Because of the high strength torsion shaft spline precision requirement is higher, consequently the wheel adopts the integral type design of beating cold to reduce and equip accumulative error, guarantee that contact site is concentric with the axial region of clamping location. In addition, the cold striking wheels are adopted to strike the splines simultaneously, so that the shaft ends are stressed symmetrically at the same time, the clamping precision of the shaft ends in the machining process is guaranteed, and the cold striking machining precision of the splines is further guaranteed to the maximum extent. The contour of the cold striking contact part of the cold striking wheel is consistent with the design requirement of the involute spline contour of the workpiece.
For promoting cold wheel life of beating, reduce the cutter cost, need provide a high strength for torsion shaft spline cold beating instrument, this instrument not only can realize the quick machine-shaping of high accuracy torsion shaft external splines, promotes cold the life who beats the instrument simultaneously, reduces manufacturing cost.
Disclosure of Invention
Technical problem to be solved
The invention provides a cold-forging tool for a spline of a high-strength torsion shaft, which aims to solve the technical problem of prolonging the service life of a cutter while ensuring the machining precision requirement of the spline.
(II) technical scheme
In order to solve the technical problem, 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 tooth form of the machined torsion shaft spline; a first non-cold-beating contact part of the cold beating wheel extends to a first tooth thickness along the involute of the cold beating 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, is transited to the second tooth thickness along the arc, and is transited to the third tooth thickness along the arc by the arc tangent point of the projection position of the second tooth thickness, and is transited to the third tooth thickness from two continuous tangent arcs in advance to increase the tooth thickness, so that the tooth strength is improved; and 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 is extended along the arc tangent line until the initial end is connected with the arc tool withdrawal groove at the tail end of the clamping positioning shaft.
Further, Cr12MoV tool steel is selected as the material of the cold forging tool.
Furthermore, the dimension error from the end surfaces of the two clamping positioning shafts to the center of the cold striking contact part is not more than 0.015 mm.
Further, the surface roughness Ra of the cold beating contact part is not more than 0.1 μm.
(III) advantageous effects
The invention provides a spline cold forging tool for a high-strength torsion shaft, which comprises a cold forging wheel and clamping and 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 tooth form of the machined torsion shaft spline; a first non-cold-beating contact part of the cold beating wheel extends to a first tooth thickness along the involute of the cold beating 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, is transited to the second tooth thickness along the arc, and is transited to the third tooth thickness along the arc by the arc tangent point of the projection position of the second tooth thickness, and is transited to the third tooth thickness from two continuous tangent arcs in advance to increase the tooth thickness, so that the tooth strength is improved; and 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 is extended along the arc tangent line until the initial end is connected with the arc tool withdrawal groove at the tail end of the clamping positioning shaft.
The cold forging tool is designed in an integrated mode, and compared with a split type design, the cold forging wheel clamping and positioning accuracy can be guaranteed; the circular 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 view of a cold-forging method for machining a spline;
fig. 2 is a schematic view of a cold forging wheel structure in an embodiment of the invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The principle of the cold forging method of the spline is shown in figure 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 forging wheel 1 is arranged on a tool rotating shaft 3, and the cold forging wheel 1 can freely rotate along the axis of the cold forging wheel; the tool rotating shafts 3 move to a feed preparation position close to the torsion shaft 2 along with the movement of the bed translation mechanism, a machine tool control system controls the two tool rotating shafts 3 to rotate, the outer rotating shaft rotates anticlockwise, the inner rotating shaft rotates clockwise, the rotating shafts drive the cold striking wheels 1 to move when rotating, when the two cold striking wheels 1 are close to the torsion shaft 2, the wheel parts of the cold striking wheels 1 strike the torsion shaft 2 once at the same time, and the striking is performed once when the rotating shafts rotate for 360 degrees; when the cold forging wheel 1 strikes the torsion shaft 2 once, the main shaft drives the torsion shaft 2 to rotate 360 degrees/z (z is the number of the spline teeth) under the control of the control system; meanwhile, the torsion shaft 2 is fed in the Z direction at the feeding speed of 52mm/min until all tooth profiles are machined.
The present embodiment proposes a spline cold-forging tool for a high-strength torsion shaft for cold-forging the above-mentioned spline, and the structure thereof is shown in fig. 2. The spline cold forging tool comprises a cold forging wheel and clamping and positioning shafts 4 which are 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 position is a cold beating wheel cold beating contact position 5, and the structural design of a first cold beating wheel non-cold beating contact position 6, a second cold beating wheel non-cold beating contact position 7 and a third cold beating wheel non-cold beating contact position 8 is to ensure the structural strength of the cold beating wheel and to facilitate the processing of the positioning shaft.
The cold beating contact part 5 of the cold beating wheel is consistent with the tooth form of the machined torsion shaft spline; a first non-cold-beating contact part 6 of the cold beating wheel extends to a first tooth thickness B along the involute of the cold beating contact part 5; the cold forging wheel second non-cold forging contact part 7 takes the arc tangent point of the projection position of the first tooth thickness B as the initial end, is transited to the second tooth thickness B1 along the arc, and is transited 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 cold forging wheel second non-cold forging contact part 7 is transited to the third tooth thickness B2 in advance from two continuous tangent arcs so as to increase the tooth thickness and improve the tooth strength; and the initial end of the contour curve of the third non-cold-forging contact part 8 of the cold forging wheel takes the projection position of the third tooth thickness B2 as a tangent point, and is extended along the arc tangent line until the initial end is connected with the arc tool withdrawal groove 9 at the tail end of the clamping positioning shaft.
The cold forging tool is made of Cr12MoV tool steel, and the size error from the end surfaces of the two clamping and positioning shafts 4 to the center of a cold forging contact part is not more than 0.015 mm; the surface roughness Ra of the cold beating contact part is not more than 0.1 μm.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A spline cold forging tool for a 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 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 tooth form of the machined torsion shaft spline; the first non-cold-striking contact part of the cold striking wheel extends to the first tooth thickness along the involute of the cold-striking contact part; the second non-cold-forging contact part of the cold forging wheel takes the arc tangent point at the projection position of the first tooth thickness as the initial end, is transited to the second tooth thickness along the arc, and is transited to the third tooth thickness along the arc at the projection position of the second tooth thickness, and is transited to the third tooth thickness from two continuous tangent arcs in advance to increase the tooth thickness, so that the tooth strength is improved; and 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 is extended along the arc tangent line until the initial end is connected with the arc tool withdrawal groove at the tail end of the clamping positioning shaft.
2. The cold striking tool of claim 1, wherein a Cr12MoV tool steel is selected for the material of the cold striking tool.
3. The cold striking tool of claim 1, wherein the dimensional error from the end faces of the two clamping and positioning shafts to the center of the cold striking contact portion is not greater than 0.015 mm.
4. The cold striking tool of claim 1, wherein said cold striking contact portion has a surface roughness Ra of not greater than 0.1 μm.
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 true CN110961507A (en) | 2020-04-07 |
| CN110961507B CN110961507B (en) | 2024-06-11 |
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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 | The molding machine and its manufacturing method of gear |
| 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 | The molding machine and its manufacturing method of gear |
| 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 |
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| CN110961507B (en) | 2024-06-11 |
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