CN107971712A - Cam bit drawing process - Google Patents
Cam bit drawing process Download PDFInfo
- Publication number
- CN107971712A CN107971712A CN201711479015.0A CN201711479015A CN107971712A CN 107971712 A CN107971712 A CN 107971712A CN 201711479015 A CN201711479015 A CN 201711479015A CN 107971712 A CN107971712 A CN 107971712A
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- China
- Prior art keywords
- cam
- cam bit
- drawing process
- blank
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- 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.)
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Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to a kind of cam bit drawing process, especially a kind of cam bit drawing process for being related to engine cam manufacturing field.The technical solution adopted by the present invention to solve the technical problems is：Cam bit drawing process, including following steps：A, repeatedly pulling is carried out to bar, becomes the cam blank for meeting product design size；B, cam blank is cut into cam bit；C, drilled to cam bit and reaming；D, honing is carried out to the hole on cam bit.The cam bit drawing process of the present invention.Blank shape precision after processing is high, and processing technology is simple, and processing cost is low, low for equipment requirements, and production efficiency is high, and mechanical property meets product requirement, can significantly reduce the cam bit drawing process of production cost.
Description
Technical field
The present invention relates to a kind of cam bit drawing process, especially a kind of cam for being related to engine cam manufacturing field
Piece drawing process.
Background technology
Port timing mechanism of the camshaft as engine, is one of important part of engine.The cam of the prior art
Axis is divided into integral structure and Split type structure.Wherein due to its structure, its shape is more complicated for integration, and cam therein
Belong to more accurate part, not only high precision machining, the requirement to its mechanical property is also higher, if some part of part is tied
Structure processing is bad, and it will cause whole part rejection.To overcome foregoing problems, technical staff proposes a kind of Split type structure form
Camshaft, using camshaft be divided into the important features such as cam bit and mandrel as Split type structure it is separately manufactured after assembled again
Complete camshaft is formed, to reduce difficulty of processing, greatly reduces manufacture cost.Manufacture for wherein cam bit, existing skill
Employed in art is the method for forging, specific to be divided into conventional forging and two kinds of forging methods of precision forging again.Routine therein
Forging technology needs multiple spheroidizing and repeatedly forging, and cost is higher, and the dimensional accuracy of blank is relatively low, is also easy to produce crackle；And
Wherein precision forging technology is high to equipment requirement, the forging from bar to blank, including cut-out, heating, is forged into several times
The processes such as type, finishing, shortcoming are：Disposably put into larger, cost is higher, and the appearance and size precision of part is not high enough, surplus compared with
Greatly, it is existing subsequently to be machined.In addition either conventional wrought processes or precision forging technology are required for product mill pair
End face, makes the manufacturing process complexity of whole cam flake products substantially increase, this is for large-scale mass production, production
Cost can also greatly increase.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of height of the blank shape precision after processing, processing technology letter
Single, processing cost is low, low for equipment requirements, and production efficiency is high, and mechanical property meets product requirement, can significantly reduce and be produced into
This cam bit drawing process.
The present invention solves cam bit drawing process used by its technical problem, including following steps：
A, repeatedly pulling is carried out to bar, becomes the cam blank for meeting cam product design size；
B, cam blank is cut into cam bit；
C, drilled to cam bit and reaming；
D, honing is carried out to the hole on cam bit.
It is further to be drawn in step A using drawing mold base, pulling force is applied to bar, makes it from stretching die
Pulled out in base.
It is further that a spheroidizing processing is carried out after cam blank stretch forming.
The beneficial effects of the invention are as follows：The application gives up the forging that camshaft manufacturing field classical production process generally uses
Technique, and then directly using bar as raw material, led to the cam bit processing and manufacture separated cam shaft using drawing process
Repeatedly pulling is crossed, makes the shape of bar shape Step wise approximation cam bit, and is finally reached the requirement of product design size.Due to convex
It is larger to engine performance impacts to take turns the cam curve part of piece, and its curve shape is also irregular, therefore cam bit is added
Work is more demanding.It is complex for this kind of shape of cam bit, and for the part having higher requirements to form accuracy, be drawn into
The cam blank precision of shape is far above the product of forging, and the technical process of drawing is also simpler than forging, and after stretch forming
Cam blank can be directly cut to multiple cam bits, single forging compared with prior art, its production efficiency significantly improves.In addition
The equipment for drawing processing is simple, without buying complex device again, the installation and debugging of new equipment is it also avoid, in fixed assets
Investing greatly reduces cost.Due to the application after drawing direct slicing, need not be ground as forging technology
Double End, so as to eliminate this complex technical process.
Brief description of the drawings
Fig. 1 is the front view of the cam blank of forging technology.
Fig. 2 is the left view of the cam blank of forging technology.
Fig. 3 is the front view of the cam blank of the technique of the present invention.
Fig. 4 is the left view of the cam blank of the technique of the present invention.
Fig. 5 is the front view of cam flake products.
Fig. 6 is the left view of cam flake products.
In figure mark for：Bar 1, cam blank 2, endoporus 3.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Cam bit drawing process as shown in Figures 3 and 4, including following steps：
A, repeatedly pulling is carried out to bar 1, becomes the cam blank 2 for meeting cam product design size；
B, cam blank 2 is cut into cam bit；
C, drilled to cam bit and reaming；
D, honing is carried out to the hole on cam bit.
The application gives up forging technology that camshaft manufacturing field classical production process generally uses (such as Fig. 1 and Fig. 2 institutes
Show), and then directly using bar 1 as raw material, led to the cam bit processing and manufacture separated cam shaft using drawing process
Repeatedly pulling is crossed, makes the shape of 1 shape Step wise approximation cam bit of bar, and is finally reached product product (as shown in Figure 5 and Figure 6)
The requirement of appearance and size.The number of drawing, and the deflection drawn every time can be according to specific 1 size of bar, cam profile rulers
It is very little to be designed.Since the cam curve part of cam bit is larger to engine performance impacts, and its curve shape is also irregular,
Therefore it is higher to the processing request of cam bit.It is complex for this kind of shape of cam bit, and have higher requirements to form accuracy
Part for, 2 precision of cam blank of stretch forming is far above the product of forging, and the technical process of drawing is also than forging letter
It is single, and the cam blank 2 after stretch forming can be directly cut to multiple cam bits, single forging such as Fig. 1 compared with prior art
Shown in Fig. 2, its production efficiency significantly improves.In addition the equipment for drawing processing is simple, without buying complex device again, also keeps away
The installation and debugging of new equipment are exempted from, cost are greatly reduced in terms of investment in fixed assets.Due to the application after drawing it is straight
Section is connect, therefore Double End need not be ground as forging technology, so as to eliminate this complex technical process.Section
After the completion of drilled to cam bit and reaming and honing so that the endoporus 3 when processing assembling.
The specific pulling process of the application is to be drawn in step A using drawing mold base, applies pulling force to bar 1,
It is set to be pulled out from drawing mold base.Ready bar 1 is placed on to the one end for drawing mold base cavity, pulling force is applied to bar 1,
Make bar 1 from cavity by the way that bar 1, by mould base squeezing action, is deformed, by multiple during by cavity
Draw, bar 1 gradually forms the appearance and size for meeting that product requires as shown in Figure 5 and Figure 6.To improve toughness of products, cam base
A spheroidizing processing is carried out after expecting 2 stretch formings.
The technical process of the application is simple in summary, and high precision machining, production cost is low, is especially suitable for high-volume, compared with
The processing of high accuracy and the more complicated cam bit of shape.
Claims (3)
1. cam bit drawing process, it is characterised in that：Including following steps：
A, repeatedly pulling is carried out to bar (1), becomes the cam blank (2) for meeting cam product design size；
B, cam blank (2) is cut into cam bit；
C, drilled to cam bit and reaming；
D, honing is carried out to the hole on cam bit.
2. cam bit drawing process dress as claimed in claim 1, it is characterised in that：Carried out in step A using drawing mold base
Draw, pulling force is applied to bar (1), it is pulled out from stretching mold base.
3. cam bit drawing process dress as claimed in claim 1, it is characterised in that：Carried out after cam blank (2) stretch forming
Spheroidizing processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479015.0A CN107971712A (en) | 2017-12-29 | 2017-12-29 | Cam bit drawing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479015.0A CN107971712A (en) | 2017-12-29 | 2017-12-29 | Cam bit drawing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107971712A true CN107971712A (en) | 2018-05-01 |
Family
ID=62005345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711479015.0A Pending CN107971712A (en) | 2017-12-29 | 2017-12-29 | Cam bit drawing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107971712A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095970A (en) * | 1994-04-29 | 1994-12-07 | 郧阳汽车标准件厂 | Process for cold-drawing spline shaft |
| CN101576124A (en) * | 2008-05-09 | 2009-11-11 | 嵊州市美亚特种轴承厂 | Process for producing thrust bearing ring |
| CN102274922A (en) * | 2011-02-01 | 2011-12-14 | 魏一波 | Cold heading manufacturing method for tappet for internal combustion engine |
| CN104148574A (en) * | 2014-07-01 | 2014-11-19 | 杭州新坐标科技股份有限公司 | Precise cold forging formed cam sheet manufacturing method |
| CN104708006A (en) * | 2013-12-11 | 2015-06-17 | 北京有色金属研究总院 | Powder metallurgy compound cam and manufacturing method thereof |
| CN105108460A (en) * | 2015-09-16 | 2015-12-02 | 杭州新坐标科技股份有限公司 | Manufacturing method of cam plate with no need for grinding of outer contour |
-
2017
- 2017-12-29 CN CN201711479015.0A patent/CN107971712A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095970A (en) * | 1994-04-29 | 1994-12-07 | 郧阳汽车标准件厂 | Process for cold-drawing spline shaft |
| CN101576124A (en) * | 2008-05-09 | 2009-11-11 | 嵊州市美亚特种轴承厂 | Process for producing thrust bearing ring |
| CN102274922A (en) * | 2011-02-01 | 2011-12-14 | 魏一波 | Cold heading manufacturing method for tappet for internal combustion engine |
| CN104708006A (en) * | 2013-12-11 | 2015-06-17 | 北京有色金属研究总院 | Powder metallurgy compound cam and manufacturing method thereof |
| CN104148574A (en) * | 2014-07-01 | 2014-11-19 | 杭州新坐标科技股份有限公司 | Precise cold forging formed cam sheet manufacturing method |
| CN105108460A (en) * | 2015-09-16 | 2015-12-02 | 杭州新坐标科技股份有限公司 | Manufacturing method of cam plate with no need for grinding of outer contour |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180501 |