CN108275198A - Electronic power assist steering machine hollow rack and its processing method - Google Patents
Electronic power assist steering machine hollow rack and its processing method Download PDFInfo
- Publication number
- CN108275198A CN108275198A CN201710006783.8A CN201710006783A CN108275198A CN 108275198 A CN108275198 A CN 108275198A CN 201710006783 A CN201710006783 A CN 201710006783A CN 108275198 A CN108275198 A CN 108275198A
- Authority
- CN
- China
- Prior art keywords
- increment
- rod end
- electronic power
- power assist
- assist steering
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/12—Steering gears mechanical of rack-and-pinion type
- B62D3/126—Steering gears mechanical of rack-and-pinion type characterised by the rack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
Abstract
A kind of electronic power assist steering machine hollow rack, including increment and rod end, increment are equipped with central through hole, and rod end is hollow stem, and increment and rod end are weldingly connected.The processing method of the electronic power assist steering machine hollow rack, including seamless steel pipe is taken to be shaped to rod end, take the solid quenched and tempered steel bar to be shaped to increment, increment and rod end are linked into an integrated entity by friction welding.The present invention is since increment and rod end are all hollow, and compared with solid rack is processed with traditional steel bar, weight reduces 30% 40% (about 1.4Kg), and prodigious contribution is made that for automotive light weight technology.
Description
Technical field
The present invention relates to a kind of automobile component, more particularly to a kind of electronic power assist steering machine hollow rack and its processing side
Method.
Background technology
With the development of society, energy crisis starts to be increasingly becoming World Focusing focus, corresponding shadow with problem of environmental pollution
People have been rung to energy-consuming idea.Some industrially developed country have worked out stringent automobile fuel ecomomy regulation, automobile system
Quotient are made in order to reduce oil consumption, while trying to improve fuel economy, raising car air pertormance, it is light to put forth effort on automobile
The research of quantization.Make automotive light weight technology, optimizing structure design, mitigate the single weight of spare and accessory parts and a crucial approach and
Effective method.
Therefore, the lightweight of automobile steering system assembly is to be worth a project of research.Wherein, steering rack is light
Quantization is again the most important thing.
Invention content
The purpose of the present invention, be exactly to solve the above-mentioned problems, provide a kind of electronic power assist steering machine hollow rack and its
Processing method.
In order to achieve the above object, present invention employs following technical schemes：A kind of electronic power assist steering machine hollow rack,
Including increment and rod end, the increment is equipped with central through hole, and the rod end is hollow stem, and increment and rod end are weldingly connected.
A diameter of 5mm of the central through hole.
The rod end wall thickness is 4.5mm, and wall thickness deflection is ± 0.05mm.
The processing method of above-mentioned electronic power assist steering machine hollow rack, includes the following steps：
One, it takes seamless steel pipe by fine grinding cold-drawn, is shaped to meet the electronic power assist steering machine hollow rack rod end long
The rod end of degree and size；
Two, solid quenched and tempered steel bar is taken, the through-hole of a diameter of 5mm is drilled out along shaft core, formation meets the electronics power-assisted and turns
To the increment blank of machine hollow rack increment length and size；
Three, satisfactory tooth form is gone out by milling, grinding, wire pulling method on increment blank, is shaped to increment；
Four, increment and rod end are linked into an integrated entity by friction welding.
The roughness of the tooth form is Ra0.8.
The tensile strength of the solid quenched and tempered steel bar reaches 980N/mm2。
The tensile strength of the electronic power assist steering machine hollow rack entirety reaches 665N/mm2。
The present invention has the following advantages that and feature as a result of above technical scheme：
1, since increment and rod end are all hollow, compared with solid rack is processed with traditional steel bar, weight reduces
30%--40% (about 1.4Kg) is made that prodigious contribution for automotive light weight technology.
2, whole to consist of two parts, increment is solid quenched and tempered steel bar, remains excellent mechanical performance；Maximum is anti-
Tensile strength can reach 980N/mm2；Rod end is seamless steel pipe, is by refining cold drawn forming, uniform wall thickness performance reaches ±
0.05, this tubing is that domestic independent development develops, and good mechanical performance is heat-treated by postorder；This steel pipe is for turning to
Rack can drive the leap of China precision seamless steel tubes industrial market；
3, existing hollow rack is usually a whole tubing, and teeth portion is made of forging and stamping；It is difficult to solve teeth portion in this way
High intensity problem, and the processing method of teeth portion is restricted；The present invention is designed to two sections, and increment is easy to implement high-strength
Degree requires and the realization of tooth form can complete the requirement of different accuracy by kinds of processes such as milling, grinding, broachings；
4, in the hollow rack that does of foreign countries be the small-bore welded tube used it is raw material, mesh since rack outer diameter is smaller
Preceding have to be optimized in the small-bore welded tube scale in China and strength, if material inlet, cost is just very high, and it is competing not have market
Strive ability；The fine grinding of seamless steel pipe, China's technology is very ripe, we design this Structure adaptation our work at present
Industry is practical, is conducive to the development for promoting national industry, solves the problems, such as raw material import, enhance the market competitiveness；
5, it solves traditional single solid steel bar by techniques such as drilling deep hole, turning come material removal, solves weight issue；
Avoid the waste problem of lot of materials；
6, rack both ends are spliced using Friction welding technique, and simple for process, function admirable, material is unlikely to deform；
7, it is that vehicle lightweight is made that contribution, reduces fuel consumption, it is not only energy saving but also economical；
8, a point both ends form, and tooth technique processed is unrestricted, are conducive to be processed according to different stage required precision.
Description of the drawings
Fig. 1 is the structural schematic diagram of electronic power assist steering machine hollow rack of the present invention.
Specific implementation mode
Referring to Fig. 1, electronic power assist steering machine hollow rack of the invention, including increment 1 and rod end 2, increment are equipped with center
Through-hole, rod end are hollow stem, and increment and rod end are weldingly connected, and label 3 is pad.
A diameter of 5mm of above-mentioned central through hole.
Above-mentioned rod end wall thickness is 4.5mm, and wall thickness deflection is ± 0.05mm.
The processing method of above-mentioned electronic power assist steering machine hollow rack, includes the following steps：
One, it takes seamless steel pipe by fine grinding cold-drawn, is shaped to meet the electronic power assist steering machine hollow rack rod end long
The rod end of degree and size；
Two, solid quenched and tempered steel bar is taken, the tensile strength of the solid quenched and tempered steel bar reaches 980N/mm2.It is drilled out directly along shaft core
Diameter is the through-hole of 5mm, forms the increment blank for meeting the electronic power assist steering machine hollow rack increment length and size；
Three, satisfactory tooth form is gone out by milling, grinding, wire pulling method on increment blank, the roughness of tooth form is
Ra0.8 is shaped to increment；
Four, increment and rod end are linked into an integrated entity by friction welding.
The tensile strength of the electronic power assist steering machine hollow rack entirety of the present invention reaches 665N/mm2.
Claims (7)
1. a kind of electronic power assist steering machine hollow rack, including increment and rod end, it is characterised in that：The increment is logical equipped with center
Hole, the rod end are hollow stem, and increment and rod end are weldingly connected.
2. steering rack shaft in electric power steering system of automobile according to claim 1, it is characterised in that：The central through hole
A diameter of 5mm.
3. steering rack shaft in electric power steering system of automobile according to claim 1, it is characterised in that：The rod end wall thickness
For 4.5mm, wall thickness deflection is ± 0.05mm.
4. the processing method of electronic power assist steering machine hollow rack described in claim 1, it is characterised in that：Include the following steps：
One, take seamless steel pipe by fine grinding cold-drawn, be shaped to meet the electronic power assist steering machine hollow rack rod end length and
The rod end of size；
Two, solid quenched and tempered steel bar is taken, the through-hole of a diameter of 5mm is drilled out along shaft core, formation meets the electronic power assist steering machine
The increment blank of hollow rack increment length and size；
Three, satisfactory tooth form is gone out by milling, grinding, wire pulling method on increment blank, is shaped to increment；
Four, increment and rod end are linked into an integrated entity by friction welding.
5. the processing method of electronic power assist steering machine hollow rack according to claim 4, it is characterised in that：The tooth form
Roughness is Ra0.8.
6. the processing method of electronic power assist steering machine hollow rack according to claim 4, it is characterised in that：The solid tune
The tensile strength of matter rod iron material reaches 980N/mm2。
7. the processing method of electronic power assist steering machine hollow rack according to claim 4, it is characterised in that：The electronics helps
The tensile strength of power turning machine hollow rack entirety reaches 665N/mm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710006783.8A CN108275198A (en) | 2017-01-05 | 2017-01-05 | Electronic power assist steering machine hollow rack and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710006783.8A CN108275198A (en) | 2017-01-05 | 2017-01-05 | Electronic power assist steering machine hollow rack and its processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108275198A true CN108275198A (en) | 2018-07-13 |
Family
ID=62800514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710006783.8A Pending CN108275198A (en) | 2017-01-05 | 2017-01-05 | Electronic power assist steering machine hollow rack and its processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108275198A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604654A (en) * | 2020-01-15 | 2020-09-01 | 上海第一机床厂有限公司 | Machining method of transfer rack transmission mechanism in nuclear fuel reactor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421346A (en) * | 2001-11-29 | 2003-06-04 | 高周波热鍊株式会社 | Hollow steering rack shaft and producing method thereof |
| CN1856377A (en) * | 2003-09-23 | 2006-11-01 | 毕晓普创新有限公司 | Composite steering rack |
| CN201013872Y (en) * | 2007-03-20 | 2008-01-30 | 蔡丕勇 | Hollow triangles steering rack |
| CN203809645U (en) * | 2014-03-06 | 2014-09-03 | 上海格尔汽车附件有限公司 | Electric power steering engine rack of automobile |
| CN204605926U (en) * | 2015-03-17 | 2015-09-02 | 上海格尔汽车附件有限公司 | Automobile electric power-assisted steering machine tooth bar |
-
2017
- 2017-01-05 CN CN201710006783.8A patent/CN108275198A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1421346A (en) * | 2001-11-29 | 2003-06-04 | 高周波热鍊株式会社 | Hollow steering rack shaft and producing method thereof |
| CN1856377A (en) * | 2003-09-23 | 2006-11-01 | 毕晓普创新有限公司 | Composite steering rack |
| CN201013872Y (en) * | 2007-03-20 | 2008-01-30 | 蔡丕勇 | Hollow triangles steering rack |
| CN203809645U (en) * | 2014-03-06 | 2014-09-03 | 上海格尔汽车附件有限公司 | Electric power steering engine rack of automobile |
| CN204605926U (en) * | 2015-03-17 | 2015-09-02 | 上海格尔汽车附件有限公司 | Automobile electric power-assisted steering machine tooth bar |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604654A (en) * | 2020-01-15 | 2020-09-01 | 上海第一机床厂有限公司 | Machining method of transfer rack transmission mechanism in nuclear fuel reactor |
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