CN106881440A - A kind of high-accuracy high intensity is reversed gear idle pulley and its forging method - Google Patents
A kind of high-accuracy high intensity is reversed gear idle pulley and its forging method Download PDFInfo
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- CN106881440A CN106881440A CN201710175164.1A CN201710175164A CN106881440A CN 106881440 A CN106881440 A CN 106881440A CN 201710175164 A CN201710175164 A CN 201710175164A CN 106881440 A CN106881440 A CN 106881440A
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- idle pulley
- gear
- high intensity
- reverses gear
- accuracy high
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
- Pulleys (AREA)
Abstract
The present invention relates to a kind of forging method of the idle pulley that reverses gear, reversed gear idle pulley and its forging method more particularly, to a kind of high-accuracy high intensity.It is mainly solve the idle pulley that reverses gear existing for prior art intensity it is poor, lack positioning, and precision when processing is poor so that assembling is poor, the more low technical problem of transmission efficiency.Steel blank is put into circular sawing machine by the present invention carries out sawing, it is sent to heating in heating furnace, then steel billet is sent in stamping machine again carries out punching press, it is then placed in being annealed in annealing furnace, spheroidizing, isothermal annealing, sandblasting is carried out to the thick part of the idle pulley that reverses gear, phosphorus saponification process, then the teeth to the thick part of the idle pulley that reverses gear carries out finishing, obtain the idle pulley essence part that reverses gear, the idle pulley essence part that will reverse gear again carries out carburizing and quenching, stress elimination, then cooled down in nitrogen, the idle pulley essence part heating that will reverse gear carries out carbo-nitriding, quenching stress is eliminated, it is passed through cooling in deep fat, finally go out the high-accuracy high intensity of finished product to reverse gear idle pulley.
Description
Technical field
The present invention relates to a kind of forging method of the idle pulley that reverses gear, more particularly, to a kind of high-accuracy high intensity reverse gear idle pulley and
Its forging method.
Background technology
Speed changer, can be in vehicle traveling process, between engine and wheel used as the necessary speed change gear of automobile
Different gear ratio are produced, by gearshift engine can be made to be operated under its optimal power performance state.Case of transmission
It is interior to transmit different rotating ratios with multigroup gear, but when automobile needs to fall back, only changing rotating ratio can not reach
To the purpose of car reversed, therefore, also there is the idle pulley that reverses gear in transmission case body, the idle pulley that reverses gear is two and does not connect mutually
Play the gear of transmission in the middle of tactile travelling gear, while with the engagement of the two gears, for changing the rotation of driven gear
Direction, is allowed to identical with driving gear, and its effect is to change steering to change gearratio.Chinese patent discloses one
Plant transmission reverse gear idle pulley structure（Authorization Notice No.：CN204784573U）, including reverse gear and idler shaft and be rotationally set in
The needle bearing on idler shaft that reverses gear, and the idle pulley that reverses gear on the needle bearing is rotatably mounted around, reverse gear idler shaft
The annular boss of the interior circular diameter with diameter greater than needle bearing, the outside diameter less than needle bearing is provided with, needle bearing is common
There are two, be single needle bearing, respectively positioned at the both sides of annular boss, side and the idler shaft that reverses gear of each needle bearing
On annular boss side between there is gap；The inner circle with diameter greater than needle bearing of the annular boss reversed gear on idler shaft
Diameter 4-4.6mm, the outside diameter 0.2-0.5mm less than needle bearing, the side of each needle bearing with reverse gear on idler shaft
Annular boss side between the gap that exists be 0.2-0.4mm；The annular boss reversed gear on idler shaft with diameter greater than rolling
The interior circular diameter 4.3mm of needle bearing, less than the outside diameter 0.4mm of needle bearing, the side of each needle bearing with reverse gear it is lazy
The gap existed between the side of the annular boss on wheel shaft is 0.3mm；Also include ring-type oil storage tank, ring-type oil storage tank is located at
The annular boss corresponding section for keeping off on the endoporus of idle pulley and reversing gear on idler shaft, has a diameter larger than the outside diameter 1- of needle bearing
2mm；The outside diameter 1.5mm with diameter greater than the needle bearing reversed gear on idler shaft of the ring-type oil storage tank reversed gear on idle pulley.But
Be this idle pulley that reverses gear intensity it is poor, lack positioning, and precision when processing is poor so that assembling is poor, transmission
It is less efficient.
The content of the invention
The present invention is to provide a kind of high-accuracy high intensity and reverses gear idle pulley and its forging method, and it is mainly solution prior art
The intensity of the existing idle pulley that reverses gear is poor, lacks positioning, and precision when processing is poor, so that assembling is poor, passes
The more low technical problem of efficiency of movement.
Above-mentioned technical problem of the invention is mainly what is be addressed by following technical proposals：
A kind of high-accuracy high intensity of the invention is reversed gear idle pulley, including idle pulley body, is provided with the endoporus of described idle pulley body
Horn mouth, one end end face of idle pulley body is provided with 3 sections of arc fins, and locating slot, locating slot are formed between adjacent arc fin
Outside be provided with locating convex block, the outer surface of arc fin is evenly equipped with teeth.By determining for 3 sections of arc fins and centre
Position groove, also locating convex block can play the effect of accurate positioning.Directly processing makes teeth in the outer surface of arc fin
The intensity for obtaining whole teeth is stronger.
Preferably, the idle pulley body end face where described locating slot is recessed fluted up and down.By groove, can be lazy
Wheel body plays a part of positioning, and the easily clamped positioning in processing when installing.
Preferably, the end face of described idle pulley body is provided with bulge loop, arc fin is looped around the periphery of bulge loop.Bulge loop
Arc fin can be played a supporting role at middle part, such idle pulley body is not likely to produce fracture when engagement is used.
A kind of high-accuracy high intensity is reversed gear the forging method of idle pulley, it is characterised in that described method includes：
A. steel blank is put into circular sawing machine carries out sawing, and the composition and percentage by weight of steel blank are：C0.23-
0.31%、Mn1.10-1.40%、Si0.10-0.40%、Cr1.00-1.30%、B≦0.0005%、Ti≦0.010%、Cu≦0.30%、
S0.025-0.040%, P≤0.030%, Al0.015-0.040%, remaining is Fe, into steel billet after sawing；
B. steel billet is sent to and 900-1100 DEG C is heated in heating furnace, steel billet is sent in stamping machine again then and is rushed
Pressure, stamps out idle pulley body and teeth, then the workpiece that punching press is completed is sent into the punching press on idle pulley body in perforating press
Go out endoporus and horn mouth, the thick part of idle pulley that reverses gear is obtained after cooling；
C. the thick part of idle pulley that will reverse gear is put into annealing furnace and is annealed, and is heated to 650-700 DEG C, 1 hour is incubated, then in stove
450-500 DEG C is cooled to, is then cooled down in air；
D. spheroidizing is carried out to the thick part of the idle pulley that reverses gear, alternating heats and cools to 700-730 DEG C, is incubated 20-30 minutes, then
Cool down in a vacuum；
E. isothermal annealing is carried out to the thick part of the idle pulley that reverses gear, is heated to 940-980 DEG C, be incubated 20-30 minutes, then cool to 620-
650 DEG C complete until annealing, last vacuum cooled；
F. sandblasting, phosphorus saponification process are carried out to the thick part of the idle pulley that reverses gear, then the teeth to the thick part of the idle pulley that reverses gear carries out finishing, obtains
To the idle pulley essence part that reverses gear；
G. the idle pulley essence part that will reverse gear is heated to 920-980 DEG C carries out carburizing and quenching, stress elimination, is then cooled down in nitrogen, then
The idle pulley essence part that will reverse gear is heated to 870-900 DEG C and carries out carbo-nitriding, quenching stress elimination, finally stablizes at 830-850 DEG C, so
It is passed through afterwards in the deep fat more than 160 DEG C and cools down, finally goes out the high-accuracy high intensity of finished product and reverse gear idle pulley.
Processing method of the invention passes sequentially through common annealing, spheroidizing, isothermal annealing so that the whole idle pulley that reverses gear exists
The intensity of crystal is repeatedly increased after annealing, the heat treatment of the idle pulley that entirely reverses gear is more uniform, therefore the change of crystal is more equal
It is even, prevent it from internally cracking.
Preferably, the alternating in described step d is heated and is cooled to：500-550 DEG C is first to heat to, then with 10
DEG C/min rapid coolings are to 350-400 DEG C, then 600-650 DEG C is warmed up to, then with 5 DEG C/min rapid coolings to 450-500 DEG C,
Finally 700-730 DEG C is warmed up to again.Alternately heat and cool down and rise gentle rapid cooling twice by three times, it is ensured that entirely reverse gear lazy
Take turns and can guarantee that the stability of crystal inside again while heating up, prevent because intensification is too fast, the temperature inside and outside the idle pulley that causes to reverse gear
Difference is excessive, so as to produce underbead crack in processing.
Preferably, the spheroidizing in described step d is completed in spheroidizing annealing furnace, in the body of heater of spheroidizing annealing furnace
Surface is provided with trapezoidal heat-conducting block, and the outer surface of heat-conducting block is provided with heat conduction bar.Trapezoidal heat-conducting block can strengthen table in whole body of heater
Face and the contact area of furnace gas, so as to strengthen heat transfer, can be gone out conduct heat away, by heat conduction bar so as to ensure that
The uniformity of in-furnace temperature.
Therefore, multiple intensification and rapid cooling when the present invention is by repeatedly annealing and heat treatment, it is ensured that
The machining accuracy of idle pulley is kept off, makes its intensity higher, not easy to break in processing, it is ensured that the running efficiency of gearbox, structure letter
It is single, reasonable.
Brief description of the drawings
Accompanying drawing 1 is a kind of structural representation of the invention；
Accompanying drawing 2 is the A-A cross-sectional views of Fig. 1；
Accompanying drawing 3 is the B-B cross-sectional views of Fig. 1；
Accompanying drawing 4 is dimensional structure diagram of the invention；
Accompanying drawing 5 is work flow schematic diagram of the invention；
Accompanying drawing 6 is a kind of structural representation of annealing furnace furnace interior of the present invention.
Parts, position and numbering in figure：Idle pulley body 1, horn mouth 2, arc fin 3, locating slot 4, locating convex block 5,
Teeth 6, groove 7, bulge loop 8, circular sawing machine 9, heating furnace 10, stamping machine 11, perforating press 12, body of heater 13, heat-conducting block 14, heat conduction bar
15。
Specific embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment：A kind of high-accuracy high intensity of this example is reversed gear idle pulley, as shown in Figure 1, Figure 2, such as Fig. 3, Fig. 4, including idle pulley sheet
Body 1, is provided with horn mouth 2 at the endoporus of idle pulley body, one end end face of idle pulley body is provided with 3 sections of arc fins 3, adjacent arc
Locating slot 4 is formed between fin, locating convex block 5 is provided with the outside of locating slot, the outer surface of arc fin is evenly equipped with teeth
6.Recessed fluted 7 on the end face of idle pulley body 1 where locating slot.The end face of idle pulley body is provided with bulge loop 8, arc fin 3
It is looped around the periphery of bulge loop.
A kind of high-accuracy high intensity is reversed gear the forging method of idle pulley, its step such as Fig. 5, including：
A. steel blank is put into circular sawing machine 9 carries out sawing, and the composition and percentage by weight of steel blank are：C0.30%、
Mn1.30%, Si0.10%, Cr1.20%, B0.0003%, Ti0.005%, Cu0.20%, S0.040%, P0.020%, Al0.030%, its
Remaining is Fe, into steel billet after sawing；
B. steel billet is sent to and 1000 DEG C is heated in heating furnace 10, steel billet is sent in stamping machine 11 again then and is rushed
Pressure, stamps out idle pulley body 1 and teeth 6, then the workpiece that punching press is completed is sent in perforating press 12 on idle pulley body 1
Stamp out endoporus and horn mouth 2, the thick part of idle pulley that reverses gear is obtained after cooling；
C. the thick part of idle pulley that will reverse gear is put into annealing furnace and is annealed, and is heated to 680 DEG C, is incubated 1 hour, then cooling in stove
To 480 DEG C, then cooled down in air；
D. spheroidizing is carried out to the thick part of the idle pulley that reverses gear, alternating heats and cools to 730 DEG C, and alternating is heated and is cooled to：First plus
Heat then with 10 DEG C/min rapid coolings to 400 DEG C, then is warmed up to 650 DEG C to 500 DEG C, is then arrived with 5 DEG C/min rapid coolings
500 DEG C, 730 DEG C being finally warmed up to again, being incubated 30 minutes, then cooled down in a vacuum, such as Fig. 6, spheroidizing is in spheroidizing
Completed in stove, the inner surface of body of heater 13 of spheroidizing annealing furnace is provided with trapezoidal heat-conducting block 14, and the outer surface of heat-conducting block is provided with heat conduction bar
15；
E. isothermal annealing is carried out to the thick part of the idle pulley that reverses gear, is heated to 950 DEG C, be incubated 30 minutes, then cool to 620 DEG C until moving back
It is fiery complete, last vacuum cooled；
F. sandblasting, phosphorus saponification process are carried out to the thick part of the idle pulley that reverses gear, then the teeth 6 to the thick part of the idle pulley that reverses gear carries out finishing,
Obtain the idle pulley essence part that reverses gear；
G. the idle pulley essence part that will reverse gear is heated to 980 DEG C carries out carburizing and quenching, stress elimination, is then cooled down in nitrogen, then will fall
Gear idle pulley essence part is heated to 870 DEG C and carries out carbo-nitriding, quenching stress elimination, finally stablizes at 830 DEG C, then passes to be more than
Cooled down in 160 DEG C of deep fat, finally go out the high-accuracy high intensity of finished product and reverse gear idle pulley.
Specific embodiment of the invention is the foregoing is only, but architectural feature of the invention is not limited thereto, Ren Heben
The technical staff in field in the field of the invention, all cover among the scope of the claims of the invention by the change or modification made.
Claims (6)
1. a kind of high-accuracy high intensity is reversed gear idle pulley, including idle pulley body（1）, it is characterised in that described idle pulley body（1）'s
Horn mouth is provided with endoporus（2）, one end end face of idle pulley body is provided with 3 sections of arc fins（3）, shape between adjacent arc fin
Into locating slot（4）, locating convex block is provided with the outside of locating slot（5）, the outer surface of arc fin is evenly equipped with teeth（6）.
2. a kind of high-accuracy high intensity according to claim 1 is reversed gear idle pulley, it is characterised in that described locating slot（4）Institute
Idle pulley body（1）It is recessed fluted on end face（7）.
3. a kind of high-accuracy high intensity according to claim 1 is reversed gear idle pulley, it is characterised in that described idle pulley body（1）
End face be provided with bulge loop（8）, arc fin（3）It is looped around the periphery of bulge loop.
4. a kind of high-accuracy high intensity is reversed gear the forging method of idle pulley, it is characterised in that described method includes：
A. steel blank is put into circular sawing machine（9）Sawing is carried out, the composition and percentage by weight of steel blank are：C0.23-
0.31%、Mn1.10-1.40%、Si0.10-0.40%、Cr1.00-1.30%、B≦0.0005%、Ti≦0.010%、Cu≦0.30%、
S0.025-0.040%, P≤0.030%, Al0.015-0.040%, remaining is Fe, into steel billet after sawing；
B. steel billet is sent to heating furnace（10）In be heated to 900-1100 DEG C, steel billet is then sent to stamping machine again（11）In
Punching press is carried out, idle pulley body is stamped out（1）And teeth（6）, then the workpiece that punching press is completed is sent to perforating press（12）In
In idle pulley body（1）On stamp out endoporus and horn mouth（2）, the thick part of idle pulley that reverses gear is obtained after cooling；
C. the thick part of idle pulley that will reverse gear is put into annealing furnace and is annealed, and is heated to 650-700 DEG C, 1 hour is incubated, then in stove
450-500 DEG C is cooled to, is then cooled down in air；
D. spheroidizing is carried out to the thick part of the idle pulley that reverses gear, alternating heats and cools to 700-730 DEG C, is incubated 20-30 minutes, then
Cool down in a vacuum；
E. isothermal annealing is carried out to the thick part of the idle pulley that reverses gear, is heated to 940-980 DEG C, be incubated 20-30 minutes, then cool to 620-
650 DEG C complete until annealing, last vacuum cooled；
F. sandblasting, phosphorus saponification process are carried out to the thick part of the idle pulley that reverses gear, then to the teeth of the thick part of the idle pulley that reverses gear（6）Carry out essence
It is whole, obtain the idle pulley essence part that reverses gear；
G. the idle pulley essence part that will reverse gear is heated to 920-980 DEG C carries out carburizing and quenching, stress elimination, is then cooled down in nitrogen, then
The idle pulley essence part that will reverse gear is heated to 870-900 DEG C and carries out carbo-nitriding, quenching stress elimination, finally stablizes at 850-830 DEG C, so
It is passed through afterwards in the deep fat more than 160 DEG C and cools down, finally goes out the high-accuracy high intensity of finished product and reverse gear idle pulley.
5. a kind of high-accuracy high intensity according to claim 4 is reversed gear the forging method of idle pulley, it is characterised in that described
Alternating in step d is heated and is cooled to：500-550 DEG C is first to heat to, then with 10 DEG C/min rapid coolings to 350-400
DEG C, then 600-650 DEG C is warmed up to, then 700-730 DEG C is finally warmed up to again to 450-500 DEG C with 5 DEG C/min rapid coolings.
6. a kind of high-accuracy high intensity according to claim 4 is reversed gear the forging method of idle pulley, it is characterised in that described
Spheroidizing in step d is completed in spheroidizing annealing furnace, the body of heater of spheroidizing annealing furnace（13）Inner surface is provided with trapezoidal heat conduction
Block（14）, the outer surface of heat-conducting block is provided with heat conduction bar（15）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710175164.1A CN106881440B (en) | 2017-03-22 | 2017-03-22 | A kind of high-accuracy high intensity is reversed gear idle pulley and its forging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710175164.1A CN106881440B (en) | 2017-03-22 | 2017-03-22 | A kind of high-accuracy high intensity is reversed gear idle pulley and its forging method |
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| Publication Number | Publication Date |
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| CN106881440A true CN106881440A (en) | 2017-06-23 |
| CN106881440B CN106881440B (en) | 2018-12-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220870A (en) * | 2018-01-23 | 2018-06-29 | 滁州英诺信电器有限公司 | A kind of handware surfacecti proteon treatment process |
| CN108672645A (en) * | 2018-05-04 | 2018-10-19 | 杭州前进锻造有限公司 | Band tooth idle pulley conjunction gear no-welding teeth portion one-step moulding method |
| CN114892121A (en) * | 2022-06-02 | 2022-08-12 | 杭州东华链条集团有限公司 | Metal material nitrocarburizing treatment process and chain |
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| CN102218500A (en) * | 2011-06-02 | 2011-10-19 | 重庆创精温锻成型有限公司 | Precision forging method for reverse idle gear of automobile gearbox |
| CN102438768A (en) * | 2009-05-14 | 2012-05-02 | 迪尔金属合作两合公司 | Method for producing a component of a synchronization device for a manual transmission |
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| CN105945537A (en) * | 2016-06-03 | 2016-09-21 | 江苏保捷锻压有限公司 | Forging technology for idle gear for automobile engine |
| CN205715563U (en) * | 2015-12-31 | 2016-11-23 | 重庆鑫赢原键机械制造有限公司 | A kind of novel idle pulley |
| CN106392506A (en) * | 2016-06-03 | 2017-02-15 | 江苏保捷锻压有限公司 | Reverse idler gear forging and pressing technology for automobile transmission |
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| JP2002227969A (en) * | 2001-01-31 | 2002-08-14 | Ooka Giken Kk | Gear and manufacturing method of the gear |
| CN102438768A (en) * | 2009-05-14 | 2012-05-02 | 迪尔金属合作两合公司 | Method for producing a component of a synchronization device for a manual transmission |
| CN102218500A (en) * | 2011-06-02 | 2011-10-19 | 重庆创精温锻成型有限公司 | Precision forging method for reverse idle gear of automobile gearbox |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108220870A (en) * | 2018-01-23 | 2018-06-29 | 滁州英诺信电器有限公司 | A kind of handware surfacecti proteon treatment process |
| CN108672645A (en) * | 2018-05-04 | 2018-10-19 | 杭州前进锻造有限公司 | Band tooth idle pulley conjunction gear no-welding teeth portion one-step moulding method |
| CN114892121A (en) * | 2022-06-02 | 2022-08-12 | 杭州东华链条集团有限公司 | Metal material nitrocarburizing treatment process and chain |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106881440B (en) | 2018-12-18 |
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