CN106736321A - A kind of 20Cr cam cuttings technique - Google Patents
A kind of 20Cr cam cuttings technique Download PDFInfo
- Publication number
- CN106736321A CN106736321A CN201611268044.8A CN201611268044A CN106736321A CN 106736321 A CN106736321 A CN 106736321A CN 201611268044 A CN201611268044 A CN 201611268044A CN 106736321 A CN106736321 A CN 106736321A
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- China
- Prior art keywords
- cam
- treatment
- carried out
- grinding
- cuttings
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005520 cutting process Methods 0.000 title claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 29
- 238000003801 milling Methods 0.000 claims abstract description 12
- 238000005255 carburizing Methods 0.000 claims abstract description 11
- 238000010791 quenching Methods 0.000 claims abstract description 10
- 230000000171 quenching effect Effects 0.000 claims abstract description 10
- 238000005496 tempering Methods 0.000 claims abstract description 8
- 210000000080 chela (arthropods) Anatomy 0.000 claims abstract description 6
- 229910001651 emery Inorganic materials 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 4
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 208000037656 Respiratory Sounds Diseases 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000003746 surface roughness Effects 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Cam drive is the important component in machine driving, particularly in the manufacture of some fixtures, the handling and clamping of workpiece is generally carried out by the way of cam clamping.Cam structure generally relies on the type face of cam to transmit power, so in the fabrication process in transmittance process, requirement to cam type surface is higher, not exclusively size requirement, while also have requirement very high to surface roughness, in existing processing, it is general to use grinding as last procedure, but because the type face of cam is special, particularly when the lift section of cam is ground, easily there is crackle, in existing processing, the probability for crackle occur is 8%.A kind of 20Cr cam cuttings technique, comprises the following steps：Blank forming；It is rough turn；Milling cam contour；Carburizing；Half smart car；Quenching；Smart car；Corase grind cam；Tempering；Fine grinding cam；Pincers worker.
Description
Technical field
The present invention relates to machining technology field, and in particular to a kind of 20Cr cam cuttings technique.
Background technology
Cam drive is the important component in machine driving, particularly in the manufacture of some fixtures, generally using cam folder
Tight mode carries out the handling and clamping of workpiece.Cam structure generally relies on the type face of cam to transmit in transmittance process
Power, so in the fabrication process, the requirement to cam type surface is higher, not exclusively size requirement, while to surface roughness
Also there is requirement very high, it is general to use grinding as last procedure in existing processing, but because the type face of cam is special
Very, particularly easily there is crackle when the lift section of cam is ground, in existing processing, the probability for crackle occur is 8%.
The content of the invention
In order to solve the problems, such as crackle easily occur during existing cam cutting, it is convex that the present invention provides a kind of 20Cr steels
Wheel processing technology.
The present invention is achieved by the following technical solution：A kind of 20Cr steels cam cutting technique, including following step
Suddenly：
S1：Blank forming, the blank with cam contour is formed by forging or casting；
S2：It is rough turn, two end faces and endoporus of roughing cam on lathe；
S3：Milling cam contour, the profile of machining cam on milling machine or machining center；
S4：Carburizing, Carburization Treatment is carried out to cam contour surface；
S5：Half smart car, two end faces and endoporus of semifinishing cam on lathe；
S6：Quenching, Quenching Treatment is carried out by the cam after step S5 treatment；
S7：Smart car, finishes two end faces and endoporus of cam on lathe；
S8：Corase grind cam, roughly grinds the type face of cam on grinding machine；
S9：Tempering, temper is carried out by the cam after step S8 treatment；
S10：Fine grinding cam, fine grinding treatment is carried out by the cam after step S9 treatment；
S11：Pincers worker, deburring is carried out by the cam after step S10 treatment.
Further, the temper is lonneal treatment, and the temperature is 180 DEG C~200 DEG C, insulation 3
Hour~4 hours.
Further, it is described fine grinding cam when grinding parameter be emery wheel abrasive material be cubic boron nitride, linear velocity 60m/s~
80m/s, radial feeds 0.003mm/r~0.007mm/r, coolant is Aquatex3380.
The beneficial effect comprise that：By the rough turn roughing standard for obtaining cam；Origin reference location is obtained with after rough turn
Milling cam contour is carried out, the type face of cam is obtained；The cam obtained after milling cam contour is carried out into carburizing, cam face is improved
C content；Half smart car is carried out to the cam after carburizing, the carburized layer of part surface is removed, only retains the carburized layer of cam type surface；Connect
And cam is quenched, improve the hardness of carburizing layer surface, while also can guarantee that the endoporus of cam has toughness higher；Essence
Car, is that the cam after quenching is modified, it is determined that the benchmark of finishing；Corase grind cam, grinding is carried out to cam type surface,
In order to prevent because stock removal is excessive in grinding process, the instantaneous temperature for causing cam type surface to be contacted with emery wheel is too high, formation the
Secondary quenching, produces grinding crack, so carrying out temper to cam after cam is roughly ground, is allowed inside cam by tempering
Tissue evenly, then carries out fine grinding cam type surface；Pincers worker deburring is carried out after fine grinding, the processing of whole cam is completed.According to
Above-mentioned technique, solves the problems, such as easily crackle occur during existing cam cutting.
Brief description of the drawings
Fig. 1 is a kind of camshaft part schematic diagram of 20Cr steels cam cutting technique of the invention.
Fig. 2 is a kind of 20Cr steels cam cutting process flow diagram of the invention.
Specific embodiment
To describe in detail in conjunction with specific embodiments with reference to the accompanying drawings below：
A kind of 20Cr steels cam cutting technique, comprises the following steps：
S1：Blank forming, the blank with cam contour is formed by forging or casting；
S2：It is rough turn, two end faces and endoporus of roughing cam on lathe；
S3：Milling cam contour, the profile of machining cam on milling machine or machining center；
S4：Carburizing, Carburization Treatment is carried out to cam contour surface；
S5：Half smart car, two end faces and endoporus of semifinishing cam on lathe；
S6：Quenching, Quenching Treatment is carried out by the cam after step S5 treatment；
S7：Smart car, finishes two end faces and endoporus of cam on lathe；
S8：Corase grind cam, roughly grinds the type face of cam on grinding machine；
S9：Tempering, temper is carried out by the cam after step S8 treatment；
S10：Fine grinding cam, fine grinding treatment is carried out by the cam after step S9 treatment；
S11：Pincers worker, deburring is carried out by the cam after step S10 treatment.
In practice, the material of cam is 20Cr to the present invention, and radius of cam base-circle is R50mm, and cam eccentricity is
23mm, tip circle radius is R68mm, center-hole diameter φ 38mm.By the rough turn roughing standard for obtaining cam；In the present embodiment,
Using common lathe（C6130）It is processed, being positioned on the basis of two end faces and centre bore of cam after rough turn is carried out
Milling cam contour, in the present embodiment, milling is carried out using milling-lathe machining center, obtains the type face of cam；It is convex after by milling
The cam obtained after wheel profile carries out carburizing, improves the C content of cam face, in the present embodiment, carburizing thickness 0.5mm；It is right
Cam after carburizing carries out half smart car, removes the carburized layer of part surface, only retains the carburized layer of cam type surface；Half smart car is followed by
And cam is quenched, improve the hardness of carburizing layer surface, while also can guarantee that the endoporus of cam has toughness higher；
Smart car is carried out after quenched, is that the cam after quenching is modified, it is determined that finishing benchmark, same smart car cam face and
Endoporus is to drawing size；Corase grind cam, grinding is carried out to cam type surface, in order to prevent in grinding process because stock removal mistake
Greatly, the instantaneous temperature for causing cam type surface to be contacted with emery wheel is too high, forms second and quenches, and grinding crack is produced, so thick
Temper is carried out to cam after mill cam, the tissue allowed inside cam by tempering evenly, then carries out fine grinding cam type
Face；Pincers worker deburring is carried out after fine grinding, the processing of whole cam is completed.Nearly 360 of camshaft is processed according to above-mentioned technique,
Occur crackle no more than 5, it is 1.38% the probability of crackle occur, at the same crack length 8mm, depth 2mm with
It is interior.Solve the problems, such as easily crackle occur during existing cam cutting, be effectively guaranteed product quality and product is qualified
Rate.
Further, uniform in order to ensure the stress after being tempered inside cam, the temper is lonneal treatment,
The temperature is 180 DEG C~200 DEG C, is incubated 3 hours~4 hours, and in the present embodiment, temperature is 190 DEG C, insulation
3.5 hours time, cam type surface is detected after tempering is organized as tempering fine martensite+retained austenite+granular and a small amount of small
Strip and block carbide, with preferable plasticity and toughness.
Further, in order to reduce grinding produce stress, during the fine grinding cam grinding parameter for emery wheel abrasive material be vertical
Square boron nitride, linear velocity 60m/s~80m/s, radial feeds 0.003mm/r~0.007mm/r, coolant is
Aquatex3380, in the present embodiment, the linear velocity 70m/s of emery wheel, radial feeds 0.005mm/r.
It should be understood that embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that readding
Read after the content of instruction of the present invention, those skilled in the art can make any various changes and modification to the present invention, these
The equivalent form of value equally falls within the application appended claims and is limited.
Claims (3)
1. a kind of 20Cr cam cuttings technique, it is characterised in that comprise the following steps：
S1：Blank forming, the blank with cam contour is formed by forging or casting；
S2：It is rough turn, two end faces and endoporus of roughing cam on lathe；
S3：Milling cam contour, the profile of machining cam on milling machine or machining center；
S4：Carburizing, Carburization Treatment is carried out to cam contour surface；
S5：Half smart car, two end faces and endoporus of semifinishing cam on lathe；
S6：Quenching, Quenching Treatment is carried out by the cam after step S5 treatment；
S7：Smart car, finishes two end faces and endoporus of cam on lathe；
S8：Corase grind cam, roughly grinds the type face of cam on grinding machine；
S9：Tempering, temper is carried out by the cam after step S8 treatment；
S10：Fine grinding cam, fine grinding treatment is carried out by the cam after step S9 treatment；
S11：Pincers worker, deburring is carried out by the cam after step S10 treatment.
2. a kind of 20Cr cam cuttings technique according to claim 1, it is characterised in that：The temper is returned for low temperature
Fire treatment, the temperature is 180 DEG C~200 DEG C, is incubated 3 hours~4 hours.
3. a kind of 20Cr cam cuttings technique according to claim 1, it is characterised in that：Grinding ginseng during the fine grinding cam
Number is cubic boron nitride for emery wheel abrasive material, and linear velocity 60m/s~80m/s, radial feeds 0.003mm/r~0.007mm/r are cold
But liquid is Aquatex3380.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611268044.8A CN106736321A (en) | 2016-12-31 | 2016-12-31 | A kind of 20Cr cam cuttings technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611268044.8A CN106736321A (en) | 2016-12-31 | 2016-12-31 | A kind of 20Cr cam cuttings technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106736321A true CN106736321A (en) | 2017-05-31 |
Family
ID=58951682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611268044.8A Pending CN106736321A (en) | 2016-12-31 | 2016-12-31 | A kind of 20Cr cam cuttings technique |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927581A (en) * | 2018-08-06 | 2018-12-04 | 合肥银泉铸造有限责任公司 | A kind of entirety worm screw processing technology |
| CN109483186A (en) * | 2018-12-24 | 2019-03-19 | 王明川 | A kind of processing technology improving plane dish-type cam cutting precision and efficiency |
| CN109837377A (en) * | 2017-11-29 | 2019-06-04 | 江苏科技大学 | The method for preventing cam of camshaft delayed crack |
| CN111283389A (en) * | 2020-03-17 | 2020-06-16 | 无锡鹰贝精密轴承有限公司 | End face grinding process for wear-resisting disc of hydraulic motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101249602A (en) * | 2008-03-21 | 2008-08-27 | 谢斌 | Processing technique of cam bit |
| CN102962650A (en) * | 2012-12-16 | 2013-03-13 | 重庆望江工业有限公司 | Method for manufacturing prismatic profiling facing cam |
| CN103433709A (en) * | 2013-08-28 | 2013-12-11 | 宁波富莱茵汽车部件有限公司 | Processing technology of camshaft |
| WO2014195098A1 (en) * | 2013-06-03 | 2014-12-11 | Mahle International Gmbh | Method for producing a cam |
| CN104233315A (en) * | 2013-06-14 | 2014-12-24 | 无锡市森信精密机械厂 | Technology for preventing grinding crack of carburizing camshaft |
| CN104259756A (en) * | 2014-08-15 | 2015-01-07 | 安庆创跃电器有限公司 | Reciprocating cutter bar mower cam machining process |
| CN105563055A (en) * | 2015-11-27 | 2016-05-11 | 陕西启源科技发展有限责任公司 | Thin-walled workpiece machining method |
-
2016
- 2016-12-31 CN CN201611268044.8A patent/CN106736321A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101249602A (en) * | 2008-03-21 | 2008-08-27 | 谢斌 | Processing technique of cam bit |
| CN102962650A (en) * | 2012-12-16 | 2013-03-13 | 重庆望江工业有限公司 | Method for manufacturing prismatic profiling facing cam |
| WO2014195098A1 (en) * | 2013-06-03 | 2014-12-11 | Mahle International Gmbh | Method for producing a cam |
| CN104233315A (en) * | 2013-06-14 | 2014-12-24 | 无锡市森信精密机械厂 | Technology for preventing grinding crack of carburizing camshaft |
| CN103433709A (en) * | 2013-08-28 | 2013-12-11 | 宁波富莱茵汽车部件有限公司 | Processing technology of camshaft |
| CN104259756A (en) * | 2014-08-15 | 2015-01-07 | 安庆创跃电器有限公司 | Reciprocating cutter bar mower cam machining process |
| CN105563055A (en) * | 2015-11-27 | 2016-05-11 | 陕西启源科技发展有限责任公司 | Thin-walled workpiece machining method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109837377A (en) * | 2017-11-29 | 2019-06-04 | 江苏科技大学 | The method for preventing cam of camshaft delayed crack |
| CN108927581A (en) * | 2018-08-06 | 2018-12-04 | 合肥银泉铸造有限责任公司 | A kind of entirety worm screw processing technology |
| CN109483186A (en) * | 2018-12-24 | 2019-03-19 | 王明川 | A kind of processing technology improving plane dish-type cam cutting precision and efficiency |
| CN111283389A (en) * | 2020-03-17 | 2020-06-16 | 无锡鹰贝精密轴承有限公司 | End face grinding process for wear-resisting disc of hydraulic motor |
| CN111283389B (en) * | 2020-03-17 | 2021-10-22 | 无锡鹰贝精密液压有限公司 | End face grinding process for wear-resisting disc of hydraulic motor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |