CN102814627B - Process for machining forging stock of crank of motorcycle - Google Patents
Process for machining forging stock of crank of motorcycle Download PDFInfo
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- CN102814627B CN102814627B CN201210317719.9A CN201210317719A CN102814627B CN 102814627 B CN102814627 B CN 102814627B CN 201210317719 A CN201210317719 A CN 201210317719A CN 102814627 B CN102814627 B CN 102814627B
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Abstract
The invention provides a process for machining a forging stock of a crank of a motorcycle, and aims to solve problems of long machining procedure, low production efficiency, slow logistics and the like of an existing process for machining a forging stock of a crank of a motorcycle. The process includes directly quenching and tempering a blank of the crankshaft after the blank of the crankshaft is forged; and then roughly machining and finely machining the blank of the crankshaft. The process for machining the forging stock of the crank of the motorcycle has the technical advantages that the crankshaft is quenched and tempered and is subjected to thermal treatment by waste heat after being forged, secondary heating and a semi-finish turning procedure are omitted, five original machining procedures are reduced to three machining procedures, and production efficiency is improved and the speed of logistics is increased as compared with the process before the process is modified.
Description
Technical field
The present invention relates to a kind of motorcycle motorcycle crank processing technology, be related specifically to a kind of motorcycle crank forging stock processing technology.
Background technology
Bent axle is one of most important part in general dynamic machine.Its function is linear driving force torque conversion piston and connecting rod transmitted is that rotating torque exports, and to drive coupled power set, in addition, also drives the valve actuating mechanism of general dynamic machine itself and various annex.Usually, motorcycle engine crankshaft is made up of main shaft, rod journal and crank, and wherein, crank is the connecting portion of main shaft neck part and rod journal.Obviously, crank is the bent axle the most complicated stressed and link that structure is the weakest.
At present, forging stock part cools, carries out rough turn processing to forging stock, then, carry out Tempering and Quenching after being generally forging crank blank by prior art motorcycle crank forging stock processing technology in atmosphere, then carries out half finish turning processing and finish turning processing.Owing to being provided with Tempering and Quenching between Vehicle Processing, therefore, forging stock size time processing can not be put in place, so that after Tempering and Quenching, due to forging stock thermal deformation, make forging stock there is no allowance.Obviously, prior art motorcycle crank forging stock processing technology also exists that manufacturing procedure is longer, at the bottom of production efficiency, the problems such as logistics is slow.
Summary of the invention
For overcoming at the bottom of longer, the production efficiency of manufacturing procedure that prior art motorcycle crank forging stock processing technology exists, the problems such as logistics is slow, the present invention proposes a kind of motorcycle crank forging stock processing technology.Motorcycle crank forging stock processing technology of the present invention, comprises the following steps:
(1), after crank shaft blank forging, directly forging stock is put into heating furnace, keep in-furnace temperature to be 820 ~ 850 DEG C, be incubated after 240 ~ 260 seconds, forging stock being inserted the trade mark is carry out Quenching Treatment in 7280 water-soluble quench cooled liquid; Forging stock is carried out tempering heat treatment, namely at 640 ~ 670 DEG C of temperature, is incubated 90 ~ 100 minutes, cools to 500 ~ 550 DEG C with the furnace, then, come out of the stove and naturally cool to room temperature in atmosphere;
(2) roughing profile: carry out alignment to bent axle, uses the left and right crank of indexable mechanically-clamped cutting tool to bent axle that the trade mark is CNMG120408 to carry out roughing, its cutting speed V
c=80 ~ 90 m/min, feed speed F=0.5 ~ 0.7 mm/r, reserve allowance 1.0 ~ 1.3 mm to throw of crankshaft direction, left and right;
(3) finish turning: use the trade mark to carry out fine finishining to crank for DNMG150608 indexable mechanically-clamped cutting tool, its cutting speed Vc=110 ~ 120 m/min, feed speed F=0.2 ~ 0.3 mm/r, finish turning is to required size.
The Advantageous Effects that the present invention plants motorcycle crank processing technology utilizes waste heat to carry out Tempering and Quenching after crankshaft forging, without post bake, cancel half finish turning operation, manufacturing procedure is reduced to three roads by five roads, than improve production efficiency before improvement and accelerating logistics.
Accompanying drawing explanation
Accompanying drawing 1 is the flow chart of motorcycle crank processing technology of the present invention.
Below in conjunction with drawings and the specific embodiments, motorcycle crank processing technology of the present invention is described further.
Detailed description of the invention
Accompanying drawing 1 is the flow chart of motorcycle crank processing technology of the present invention, and as seen from the figure, motorcycle crank forging stock processing technology of the present invention, comprises the following steps:
(1), after crank shaft blank forging, directly forging stock is put into heating furnace, keep in-furnace temperature to be 820 ~ 850 DEG C, be incubated after 240 ~ 260 seconds, forging stock being inserted the trade mark is carry out Quenching Treatment in 7280 water-soluble quench cooled liquid; Forging stock is carried out tempering heat treatment, namely at 640 ~ 670 DEG C of temperature, is incubated 90 ~ 100 minutes, cools to 500 ~ 550 DEG C with the furnace, then, come out of the stove and naturally cool to room temperature in atmosphere;
(2) roughing profile: alignment is carried out to bent axle, the trade mark is used to carry out roughing for the left and right crank of CNMG120408 indexable mechanically-clamped cutting tool to bent axle, its cutting speed Vc=80 ~ 90 m/min, feed speed F=0.5 ~ 0.7 mm/r, reserves allowance 1.0 ~ 1.3 mm to throw of crankshaft direction, left and right;
(3) finish turning: use the trade mark to carry out fine finishining to crank for DNMG150608 indexable mechanically-clamped cutting tool, its cutting speed Vc=110 ~ 120 m/min, feed speed F=0.2 ~ 0.3 mm/r, finish turning is to required size.
The Advantageous Effects that the present invention plants motorcycle crank processing technology utilizes waste heat to carry out Tempering and Quenching after crankshaft forging, without post bake, cancel half finish turning operation, manufacturing procedure is reduced to three roads by five roads, than improve production efficiency before improvement and accelerating logistics.
Specific embodiment 1
To 168F2 type (general dynamic machine) spherulitic iron crankshaft, adopt motorcycle crank forging stock processing technology of the present invention, comprise the following steps:
(1), after crank shaft blank forging, directly forging stock is put into heating furnace, keep in-furnace temperature to be 820 DEG C, be incubated after 240 seconds, forging stock being inserted the trade mark is carry out Quenching Treatment in 7280 water-soluble quench cooled liquid; Forging stock is carried out tempering heat treatment, namely at 640 DEG C of temperature, is incubated 90 minutes, cools to 500 DEG C with the furnace, then, come out of the stove and naturally cool to room temperature in atmosphere;
(2) roughing profile: alignment is carried out to bent axle, the trade mark is used to carry out roughing for the left and right crank of CNMG120408 indexable mechanically-clamped cutting tool () to bent axle, its cutting speed Vc=80 m/min, feed speed F=0.5 mm/r, reserves allowance 1.0 mm to throw of crankshaft direction, left and right;
(3) finish turning: use the trade mark to carry out fine finishining to crank for DNMG150608 indexable mechanically-clamped cutting tool, its cutting speed Vc=110 m/min, feed speed F=0.2 mm/r, finish turning is to required size.
Specific embodiment 2
To 21P65FA type (general dynamic machine) spherulitic iron crankshaft, adopt motorcycle crank forging stock processing technology of the present invention, comprise the following steps:
(1), after crank shaft blank forging, directly forging stock is put into heating furnace, keep in-furnace temperature to be 850 DEG C, be incubated after 260 seconds, forging stock being inserted the trade mark is carry out Quenching Treatment in 7280 water-soluble quench cooled liquid; Forging stock is carried out tempering heat treatment, namely at 670 DEG C of temperature, is incubated 100 minutes, cools to 550 DEG C with the furnace, then, come out of the stove and naturally cool to room temperature in atmosphere;
(2) roughing profile: alignment is carried out to bent axle, the trade mark is used to carry out roughing for the left and right crank of CNMG120408 indexable mechanically-clamped cutting tool to bent axle, its cutting speed Vc=90 m/min, feed speed F=0.7 mm/r, reserves allowance 1.3 mm to throw of crankshaft direction, left and right;
(3) finish turning: use trade mark DNMG150608 indexable mechanically-clamped cutting tool to carry out fine finishining to crank, its cutting speed Vc=120 m/min, feed speed F0.3 mm/r, finish turning is to required size.
Specific embodiment 3
To 160F type (general dynamic machine) bent axle, adopt motorcycle crank forging stock processing technology of the present invention, comprise the following steps:
(1), after crank shaft blank forging, directly forging stock is put into heating furnace, keep in-furnace temperature to be 850 DEG C, be incubated after 240 seconds, forging stock being inserted the trade mark is carry out Quenching Treatment in 7280 water-soluble quench cooled liquid; Forging stock is carried out tempering heat treatment, namely at 670 DEG C of temperature, is incubated 90 minutes, cools to 500 DEG C with the furnace, then, come out of the stove and naturally cool to room temperature in atmosphere;
(2) roughing profile: alignment is carried out to bent axle, the trade mark is used to carry out roughing for the left and right crank of CNMG120408 indexable mechanically-clamped cutting tool to bent axle, its cutting speed Vc=90 m/min, feed speed F=0.5 mm/r, reserves allowance 1.0 mm to throw of crankshaft direction, left and right;
(3) finish turning: use the trade mark to carry out fine finishining to crank for DNMG150608 indexable mechanically-clamped cutting tool, its cutting speed Vc=120 m/min, feed speed F=0.2 mm/r, finish turning is to required size.
Specific embodiment 4
To 173F type (general dynamic machine) bent axle, adopt motorcycle crank forging stock processing technology of the present invention, comprise the following steps:
(1), after crank shaft blank forging, directly forging stock is put into heating furnace, keep in-furnace temperature to be 840 DEG C, be incubated after 250 seconds, forging stock being inserted the trade mark is carry out Quenching Treatment in 7280 water-soluble quench cooled liquid; Forging stock is carried out tempering heat treatment, namely at 640 ~ 670 DEG C of temperature, is incubated 95 minutes, cools to 530 DEG C with the furnace, then, come out of the stove and naturally cool to room temperature in atmosphere;
(2) roughing profile: alignment is carried out to bent axle, the trade mark is used to carry out roughing for the left and right crank of CNMG120408 indexable mechanically-clamped cutting tool to bent axle, its cutting speed Vc=85 m/min, feed speed F=0.6 mm/r, reserves allowance 1.2 mm to throw of crankshaft direction, left and right;
(3) finish turning: use the trade mark to carry out fine finishining to crank for DNMG150608 indexable mechanically-clamped cutting tool, its cutting speed Vc=115 m/min, feed speed F=0.2 mm/r, finish turning is to required size.
The Advantageous Effects that the present invention plants motorcycle crank processing technology utilizes waste heat to carry out Tempering and Quenching after crankshaft forging, without post bake, cancel half finish turning operation, manufacturing procedure is reduced to three roads by five roads, than improve production efficiency before improvement and accelerating logistics.
Claims (1)
1. a motorcycle crank forging stock processing technology, is characterized in that, comprises the following steps:
(1), after crank shaft blank forging, directly forging stock is put into heating furnace, keep in-furnace temperature to be 820 ~ 850 DEG C, be incubated after 240 ~ 260 seconds, forging stock being inserted the trade mark is carry out Quenching Treatment in 7280 water-soluble quench cooled liquid; Forging stock is carried out tempering heat treatment, namely at 640 ~ 670 DEG C of temperature, is incubated 90 ~ 100 minutes, cools to 500 ~ 550 DEG C with the furnace, then, come out of the stove and naturally cool to room temperature in atmosphere;
(2) roughing profile: alignment is carried out to bent axle, the trade mark is used to carry out roughing for the left and right crank of CNMG120408 indexable mechanically-clamped cutting tool to bent axle, its cutting speed Vc=80 ~ 90 m/min, feed speed F=0.5 ~ 0.7 mm/r, reserves allowance 1.0 ~ 1.3 mm to throw of crankshaft direction, left and right;
(3) finish turning: use the trade mark to carry out fine finishining to crank for DNMG150608 indexable mechanically-clamped cutting tool, its cutting speed Vc=110 ~ 120 m/min, feed speed F=0.2 ~ 0.3 mm/r, finish turning is to required size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317719.9A CN102814627B (en) | 2012-08-31 | 2012-08-31 | Process for machining forging stock of crank of motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317719.9A CN102814627B (en) | 2012-08-31 | 2012-08-31 | Process for machining forging stock of crank of motorcycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102814627A CN102814627A (en) | 2012-12-12 |
| CN102814627B true CN102814627B (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210317719.9A Active CN102814627B (en) | 2012-08-31 | 2012-08-31 | Process for machining forging stock of crank of motorcycle |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071752A (en) * | 2013-01-21 | 2013-05-01 | 谭哲强 | Forging process of crank blank |
| CN103481040B (en) * | 2013-10-16 | 2015-09-30 | 青岛肯拉铎机械有限公司 | Crank processing technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1201774A2 (en) * | 2000-10-25 | 2002-05-02 | Gohsyu Corporation | Forging method |
| CN101524813A (en) * | 2009-04-01 | 2009-09-09 | 重庆歇马机械曲轴有限公司 | Waste heat hardening and tempering process of motorcycle crank forged piece |
| CN101947716A (en) * | 2010-07-21 | 2011-01-19 | 上海汇大机械制造有限公司 | Method for premachining semicircle crankshaft hole |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53118212A (en) * | 1977-03-25 | 1978-10-16 | Nippon Netsushiyori Kougiyou K | Heat treating method of heattforged parts |
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2012
- 2012-08-31 CN CN201210317719.9A patent/CN102814627B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1201774A2 (en) * | 2000-10-25 | 2002-05-02 | Gohsyu Corporation | Forging method |
| CN101524813A (en) * | 2009-04-01 | 2009-09-09 | 重庆歇马机械曲轴有限公司 | Waste heat hardening and tempering process of motorcycle crank forged piece |
| CN101947716A (en) * | 2010-07-21 | 2011-01-19 | 上海汇大机械制造有限公司 | Method for premachining semicircle crankshaft hole |
Non-Patent Citations (2)
| Title |
|---|
| 45和40Cr钢曲柄锻造余热调质工艺;韩家学等;《金属热处理》;20090925;75-77 * |
| 曲轴外圆复合车削的工艺规划研究;王云景;《中国优秀硕士学位论文全文数据库-工程科技I辑》;20110915;B022-298 * |
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| CN102814627A (en) | 2012-12-12 |
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