CN104959793A - Camshaft argon arc remelting production and machining process - Google Patents
Camshaft argon arc remelting production and machining process Download PDFInfo
- Publication number
- CN104959793A CN104959793A CN201510378644.9A CN201510378644A CN104959793A CN 104959793 A CN104959793 A CN 104959793A CN 201510378644 A CN201510378644 A CN 201510378644A CN 104959793 A CN104959793 A CN 104959793A
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- Prior art keywords
- camshaft
- eddy
- sec
- rate
- processing technology
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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
- 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
- B23P2700/02—Camshafts
Abstract
The invention discloses a camshaft argon arc remelting production and machining process. The camshaft machining process includes the following steps that a strip round material is placed on a punch to be cut off; the cut-off round material is placed in a heating device to be preheated, and the round material is heated to 900 DEG C to 1000 DEG C in an induction mode, wherein the heating rate ranges from 70 DEG C/s to 80 DEG C/s; then a preheated camshaft is heated to 1000 DEG C to 1200 DEG C in an induction mode, wherein the heating rate ranges from 50 DEG C/s to 60 DEG C/s; thermal refining is conducted, and hardness is made to range from 28 HRC to 30 HRC; the heated material is placed in a forming die, and the material is formed through punch forging; then under the arc high-temperature effect, tiny molten pools are formed on the surface of a cam through protection of argon laminar flow, after arc transfer, the molten pools are chilled through heat absorption of a workpiece, fine ledeburite tissue is obtained, and turning and deburring are conducted. The grains of the camshaft are fine, abrasion resistance of the camshaft is higher than that of chilled cast iron, mechanization is easy to achieve, quality is stable, the rejection rate is low, and cost is low.
Description
Technical field
The present invention relates to camshaft processing technique field, specifically belong to a kind of camshaft argon arc remelting production and processing technology.
Background technology
Camshaft is one of part of key in Valve System of Internal Combustion Engine, and whole valve actuating mechanism is by camshaft actuated, and the performance of design to whole air distribution system of cam plays conclusive effect.Camshaft poor rigidity, yielding; Precision is high, and difficulty of processing is large; Along with the development of automobile industry, add the demand of accessory, the demand of camshaft can be in any more always.
Camshaft is parts in piston engine.Its effect is the opening and closing action controlling valve.Although the rotating speed of camshaft is the half (identical with bent axle at the rotating speed of two stroke engine convexity wheel shaft) of bent axle in four-stroke engine, but its rotating speed is still very high usually, and need to bear very large moment of torsion, therefore very high to the requirement of camshaft in intensity and support in design, its material is generally Special Casting Iron, also to have once in a while and adopts forging.The camshaft hardness that prior art makes is not high, the degree of depth of chill is inadequate, and percent defective is higher in process of production, thus cost is high, and working (machining) efficiency is low.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of camshaft argon arc remelting production and processing technology, camshaft crystal grain is tiny, wearability is higher than chilled cast iron, be easy to realize mechanization, steady quality, percent defective is low, cost is low.
The technical solution used in the present invention is as follows:
A kind of camshaft argon arc remelting production and processing technology, the processing technology of described camshaft comprises following step: be placed on by rectangular rounded material on punch press to enter to cut off to it; Rounded material after cutting off is placed on preheating in firing equipment, and by its eddy-current heating to 900 ~ 1000 DEG C, the rate of heat addition is 70 ~ 80 DEG C/sec; Then by camshaft eddy-current heating to 1000 ~ 1200 DEG C after preheating, the rate of heat addition is 50 ~ 60 DEG C/sec; Modifier treatment, makes hardness meet 28 ~ 30HRC; Material after heating is placed in mould, by forging of punching machine by forming materials; Then under high arc temperature (6000-8000K) effect; utilize the protection of argon gas laminar flow, form small molten bath, after arc transfer at cam face; make molten bath Quench by workpiece self heat absorption and obtain tiny ledeburite organization, Vehicle Processing and deburring operation.
The each bearing journal of described camshaft is by rough turn, finish turning, fine grinding, so to pressing cam corase grind, fine grinding, for helical gear by rough turn, finish turning, fine grinding, gear hobbing process, the processing sequence on each surface by from thick to essence and major surfaces mutually to intersect with the manufacturing procedure of minor surface and carry out.
By its eddy-current heating to 950 DEG C, the rate of heat addition is 75 DEG C/sec; Then by the camshaft eddy-current heating to 1100 DEG C after preheating, the rate of heat addition is 55 DEG C/sec.
Compared with the prior art, beneficial effect of the present invention is as follows:
The present invention is tiny at camshaft surface ledeburite organization crystal grain, wearability is higher than chilled cast iron, be easy to realize mechanization, steady quality, percent defective is low, cost is low.
Detailed description of the invention
A kind of camshaft argon arc remelting production and processing technology, the processing technology of described camshaft comprises following step: be placed on by rectangular rounded material on punch press to enter to cut off to it, rounded material after cutting off is placed on preheating in firing equipment, and by its eddy-current heating to 950 DEG C, the rate of heat addition is 75 DEG C/sec, then by the camshaft eddy-current heating to 1100 DEG C after preheating, the rate of heat addition is 60 DEG C/sec, modifier treatment, makes hardness meet 28 ~ 30HRC, material after heating is placed in mould, by forging of punching machine by forming materials, then under high arc temperature (6000-8000K) effect, utilize the protection of argon gas laminar flow, small molten bath is formed at cam face, after arc transfer, make molten bath Quench by workpiece self heat absorption and obtain tiny ledeburite organization, Vehicle Processing and deburring operation, carrying out each bearing journal of camshaft added described in man-hour is by rough turn, finish turning, fine grinding, so to pressing cam corase grind, fine grinding, by rough turn for helical gear, finish turning, fine grinding, gear hobbing process, the processing sequence on each surface is pressed from thick to essence, and major surfaces mutually intersects with the manufacturing procedure of minor surface and carries out.Camshaft surface ledeburite organization of the present invention crystal grain is tiny, wearability is higher than chilled cast iron, be easy to realize mechanization, steady quality, percent defective is low, cost is low.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (3)
1. a camshaft argon arc remelting production and processing technology, is characterized in that: the processing technology of described camshaft comprises following step: be placed on by rectangular rounded material on punch press to enter to cut off to it; Rounded material after cutting off is placed on preheating in firing equipment, and by its eddy-current heating to 900 ~ 1000 DEG C, the rate of heat addition is 70 ~ 80 DEG C/sec; Then by camshaft eddy-current heating to 1000 ~ 1200 DEG C after preheating, the rate of heat addition is 50 ~ 60 DEG C/sec; Modifier treatment, makes hardness meet 28 ~ 30HRC; Material after heating is placed in mould, by forging of punching machine by forming materials; Then under high arc temperature effect, utilize the protection of argon gas laminar flow, form small molten bath at cam face, after arc transfer, make molten bath Quench by workpiece self heat absorption and obtain tiny ledeburite organization, Vehicle Processing and deburring operation.
2. a kind of camshaft argon arc remelting production and processing technology according to claim 1, it is characterized in that: each bearing journal of described camshaft is by rough turn, finish turning, fine grinding, so to pressing cam corase grind, fine grinding, for helical gear by rough turn, finish turning, fine grinding, gear hobbing process, the processing sequence on each surface by from thick to essence and major surfaces mutually to intersect with the manufacturing procedure of minor surface and carry out.
3. a kind of camshaft argon arc remelting production and processing technology according to claim 1, it is characterized in that: by its eddy-current heating to 950 DEG C, the rate of heat addition is 75 DEG C/sec; Then by the camshaft eddy-current heating to 1100 DEG C after preheating, the rate of heat addition is 55 DEG C/sec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378644.9A CN104959793A (en) | 2015-06-29 | 2015-06-29 | Camshaft argon arc remelting production and machining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378644.9A CN104959793A (en) | 2015-06-29 | 2015-06-29 | Camshaft argon arc remelting production and machining process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104959793A true CN104959793A (en) | 2015-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510378644.9A Pending CN104959793A (en) | 2015-06-29 | 2015-06-29 | Camshaft argon arc remelting production and machining process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104959793A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964898A (en) * | 2019-12-20 | 2020-04-07 | 荆州环球汽车零部件制造有限公司 | Induction quenching process for hardening alloy cast iron camshaft by using compressed air |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058237A (en) * | 1991-07-31 | 1992-01-29 | 张继启 | Modular cast iron cam shaft and manufacture method thereof |
| DE102007023087A1 (en) * | 2007-05-16 | 2008-03-27 | Daimler Ag | Manufacturing cam for built-up cam shaft used in vehicle engine, employs steel of specified carbon content, hot or cold deformation, tempering and hardening operations |
| CN101913057A (en) * | 2010-07-16 | 2010-12-15 | 湖北威风汽车配件股份有限公司 | Production method of low-consumable engine camshaft |
| CN104439936A (en) * | 2014-11-06 | 2015-03-25 | 无锡市百顺机械厂 | Machining technology of camshaft |
-
2015
- 2015-06-29 CN CN201510378644.9A patent/CN104959793A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058237A (en) * | 1991-07-31 | 1992-01-29 | 张继启 | Modular cast iron cam shaft and manufacture method thereof |
| DE102007023087A1 (en) * | 2007-05-16 | 2008-03-27 | Daimler Ag | Manufacturing cam for built-up cam shaft used in vehicle engine, employs steel of specified carbon content, hot or cold deformation, tempering and hardening operations |
| CN101913057A (en) * | 2010-07-16 | 2010-12-15 | 湖北威风汽车配件股份有限公司 | Production method of low-consumable engine camshaft |
| CN104439936A (en) * | 2014-11-06 | 2015-03-25 | 无锡市百顺机械厂 | Machining technology of camshaft |
Non-Patent Citations (1)
| Title |
|---|
| 任三平 等: "凸轮轴氩弧重熔工艺的主要缺陷及解决办法", 《汽车工艺与材料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964898A (en) * | 2019-12-20 | 2020-04-07 | 荆州环球汽车零部件制造有限公司 | Induction quenching process for hardening alloy cast iron camshaft by using compressed air |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20151007 |