CN206092874U - Balanced axle helical gear of car - Google Patents
Balanced axle helical gear of car Download PDFInfo
- Publication number
- CN206092874U CN206092874U CN201620831507.6U CN201620831507U CN206092874U CN 206092874 U CN206092874 U CN 206092874U CN 201620831507 U CN201620831507 U CN 201620831507U CN 206092874 U CN206092874 U CN 206092874U
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- helical gear
- helical
- tooth
- angle
- balance shaft
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Abstract
The utility model discloses a balanced axle helical gear of car, for powder metallurgy parallel axis helical gear, including setting up the pilot hole central with the denticle to and establish the skewed tooth in the denticle outer fringe, the helical angle of skewed tooth 20 the utility model discloses a balanced axle helical gear is effectively solved the metallurgical helical gear of king bolt angle high density powder of production high rigidity and is prepared the problem. It is blank to have filled high performance powder metallurgy helical gear. It is high to have the shaping green density, and the helical angle is big, and the high advantage of off -the -shelf hardness high wearing feature guarantees that the unburned bricks tooth helical angle of extrusion reaches 25, and tooth portion hardness reaches HRC50~55, and powder unburned bricks tooth portion density reaches more than the 7.2gcm3.
Description
Technical field
A kind of this utility model powder metallurgy automobile parts technical field, and in particular to Automobile balance shaft helical gear.
Background technology
Helical gear is when transmitting movement and power, stable with gear ratio, and transmitting movement accurately and reliably, imitate by transmission
Rate is high, and the little advantage of noise is widely used in the industries such as various machines, automobile, clock and watch, instrument, electrical equipment.
Current powder metallurgical helical gear, universal density are low（7.1g/cm3Below）, hardness is low（HRC35～45）, helical angle
It is less（Less than 20 °）.In Automobile balance shaft at a high speed（More than 4500 turns of ignition point）It is in the case that low load operates, this common
Powder metallurgical helical gear can't be used, and use requirement is not also reached in terms of intensity and antiwear property.
Utility model content
Goal of the invention：For the deficiencies in the prior art, it is an object of the present invention to provide a kind of automobile balance axis helical teeth
Wheel, with high intensity and antiwear property, meets use demand.
Technical scheme：For achieving the above object, the technical solution adopted in the utility model is：
A kind of Automobile balance shaft helical gear, is powder metallurgy parallel axes helical gear, including arranges the assembling with denticle center
Hole, and it is located at the helical teeth of denticle outer rim；20 ° of helical angle ＞ of described helical teeth
The helical angle of described helical teeth is 25 °.
Described balance shaft helical gear, teeth portion density 7.2g/cm3MIN, remaining density 7.0g/cm3MIN, surface hardness：
HRC50～55.
One kind prepares the helical gear method of Automobile balance shaft, and technique is：Shaping → sintering → machining → heat treatment → essence
Machining → roll flute → last item；Wherein, molding adopts powder former 550T, and molding pressing pressure is 300T, and powder metallurgy is former
100 DEG C of material heating, former heats 100 DEG C；25 ° of former tooth helical angle；Carried out using active screw mechanism：On sweep away and be pressed into into the moon
During mould, on rush the internal coiling profile of tooth fairlead that outer ring has gap to coordinate, fairlead end face overlays female mold surfaces, now, is above punched in
Former, compacted products are rotated in the presence of fairlead.
Described prepares the helical gear method of Automobile balance shaft, and the helical gear powder metallurgy of parallel axes is elementary composition to be：Copper：
1 ~ 1.5%, nickel：1 ~ 1.5%, molybdenum：0.7 ~ 1.5%, carbon：0.3 ~ 0.8%, impurity：2% is maximum, ferrum：Surplus.
Described prepares the helical gear method of Automobile balance shaft, sintering：1120 DEG C ± 10 DEG C of temperature, guipure speed：120±
10mm/min, sintering atmosphere：Ammonolysis craft protective atmosphere；More than product sintered material hardness HRB90.
Described prepares the helical gear method of Automobile balance shaft, machining：CNC machine tools, 800～1000r/min of rotating speed, car
The amount of cutting 0.1mm/r, amount of feeding 0.05mm/min, lathe tool CBN, remove excess stock, it is ensured that size.
Described prepares the helical gear method of Automobile balance shaft, heat treatment：890 DEG C of temperature, CP1.1, ammonia flow：6m3/
H, time：2h, 100 DEG C of oil temperature, 870 DEG C of delay temperature, CP1.1, time 20min, 130 DEG C of temperature, time 1h；Oil product：
Fast quenching oil；Product surface hardness reaches HRC50～55.
Described prepares the helical gear method of Automobile balance shaft, essence machining：CNC machine tools, 1000～1200r/ of rotating speed
Min, Lathe quantity 0.05mm/r, amount of feeding 0.02mm/min；Lathe tool CBN, turning inner hole is used as grinding external tooth benchmark, it is ensured that endoporus
With external tooth concentricity.
Described prepares the helical gear method of Automobile balance shaft, roll flute：Precision grinder, profile of tooth are whetted a knife；After accurate grinding, produce
Product profile accuracy reaches more than DIN6 levels.
Beneficial effect：Compared with prior art, balance shaft helical gear of the present utility model, using the raw material group of original creation
Point, ensure high-wearing feature from design（After heat treatment, more than HRC50 reaches use requirement）.Wen Mo is adopted during molding（Former adds
Heat）Wen Fen（Powder is heated）Technique, under high tonnage presses, makes powder green compact teeth portion density reach 7.2g/cm3More than, molding
Mold cavity block die cavity tooth helical angle is 25 °, it is ensured that the green compact tooth helical angle of extrusion reaches 25 °, and punch rotating mechanism is using actively
Rotating mechanism, greatly reduces the pressurized of former teeth portion, it is ensured that the service life of former；Technique of the heat treatment using special parameter
Condition（Carbo-nitriding）, make teeth portion hardness reach HRC50～55, it is ensured that teeth portion high-wearing feature.There is this utility model molding to give birth to
Base density is high, and helical angle is big, and the high advantage of the hardness high-wearing feature of finished product, the large helix angle of effectively solving production high rigidity are highly dense
Degree powder metallurgical helical gear produces problem.High-performance powder metallurgy helical gear is filled up blank.
Description of the drawings
Fig. 1 is the helical gear front view of Automobile balance shaft；
Fig. 2 is the A-A of Fig. 1 to sectional view.
Specific embodiment
This utility model is further elaborated below in conjunction with specific embodiment.Embodiment is for illustrative and not limiting
Utility model.Any those of ordinary skill in this area is it will be appreciated that these embodiments limit this practicality newly never in any form
Type, can make appropriate modification and without prejudice to essence of the present utility model and deviate scope of the present utility model.
Embodiment 1
Automobile balance shaft helical gear, as depicted in figs. 1 and 2, is powder metallurgy parallel axes helical gear, including is arranged and denticle
The pilot hole 1 at center, and it is located at the helical teeth 2 of denticle outer rim.The helical gear powder metallurgy element of the powder metallurgy parallel axes（Matter
Amount percentage ratio）Consist of：Copper：1 ~ 1.5%, nickel：1 ~ 1.5%, molybdenum：0.7 ~ 1.5%, carbon：0.3 ~ 0.8%, impurity：2% is maximum, ferrum：It is remaining
Amount.
The helical gear preparation technology of the powder metallurgy parallel axes is：Shaping → sintering → machining → heat treatment →（Grinding
Benchmark）Smart machining → roll flute → last item.
Wherein, molding：Powder former 550T, molding pressing pressure 300T, powder heat 100 DEG C, former heating 100
℃；25 ° of former tooth helical angle；Punch rotating mechanism adopts active rotation mechanism：On sweep away when being pressed into into former, on rush outer ring and have
The internal coiling profile of tooth fairlead that gap coordinates, fairlead end face overlay female mold surfaces, now, revolve in the presence of being above punched in fairlead
Rotate into into former, compacted products, former teeth portion stress are less, and former service life is higher.And existing common rotating mechanism behaviour
As：Upper punching is above rushed in into former without fairlead, and former is fixed, and upper punching is rotated in cavity impression along former helical angle,
Former tooth stress is larger, and former tooth is fragile, this mechanism can only molding low pitch angle, low-density helical gear.
Sintering：1120 DEG C ± 10 DEG C of temperature, guipure speed：120 ± 10mm/min, sintering atmosphere：Ammonolysis craft protective atmosphere.
More than product sintered material hardness HRB90.
Machining：CNC machine tools, 800～1000r/min of rotating speed, Lathe quantity 0.1mm/r, amount of feeding 0.05mm/min, lathe tool
CBN, removes excess stock, it is ensured that size.
Heat treatment：890 DEG C of temperature, CP（Carbon potential）1.1, ammonia flow：6m3/ h, time：2H, 100 DEG C of oil temperature postpone temperature
870 DEG C of degree, CP（Carbon potential）1.1, time 20min, 130 DEG C of temperature, time 1h.Oil product：Fast quenching oil.Product surface is hard
Degree reaches HRC50～55.
Essence machining：CNC machine tools, 1000～1200r/min of rotating speed, Lathe quantity 0.05mm/r, amount of feeding 0.02mm/min.
Lathe tool CBN, turning inner hole is used as grinding external tooth benchmark, it is ensured that endoporus and external tooth concentricity.
Roll flute：Precision grinder, profile of tooth are whetted a knife.After accurate grinding, product profile accuracy reaches more than DIN6 levels.
Last item：Product interference is pressed in balance shaft.
Finished product to preparing detects, density：Teeth portion 7.2g/cm3MIN, remaining 7.0g/cm3 MIN, top layer are hard
Degree：HRC50～55；With high intensity and antiwear property, use demand can be met.
Although this utility model is described according to above-mentioned specific embodiment, utility model of the present utility model
Thought is not limited to that utility model, and this patent patent right guarantor will be all included in the repacking of any utilization this utility model thought
In the range of shield.
Claims (4)
1. a kind of Automobile balance shaft helical gear, it is characterised in that for powder metallurgy parallel axes helical gear, including arrange with denticle
The pilot hole of the heart（1）, and the helical teeth for being located at denticle outer rim（2）；Described helical teeth（2）20 ° of helical angle ＞.
2. Automobile balance shaft helical gear according to claim 1, it is characterised in that described helical teeth（2）Helical angle be
25°。
3. Automobile balance shaft helical gear according to claim 1, it is characterised in that described balance shaft helical gear, teeth portion
Density 7.2g/cm3MIN, remaining density 7.0g/cm3 MIN。
4. Automobile balance shaft helical gear according to claim 1, it is characterised in that described balance shaft helical gear, top layer
Hardness：HRC50～55.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620831507.6U CN206092874U (en) | 2016-08-03 | 2016-08-03 | Balanced axle helical gear of car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620831507.6U CN206092874U (en) | 2016-08-03 | 2016-08-03 | Balanced axle helical gear of car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206092874U true CN206092874U (en) | 2017-04-12 |
Family
ID=58467687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620831507.6U Active CN206092874U (en) | 2016-08-03 | 2016-08-03 | Balanced axle helical gear of car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206092874U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051115A (en) * | 2016-08-03 | 2016-10-26 | 扬州意得机械有限公司 | Vehicle balance shaft bevel gear and preparation method thereof |
-
2016
- 2016-08-03 CN CN201620831507.6U patent/CN206092874U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051115A (en) * | 2016-08-03 | 2016-10-26 | 扬州意得机械有限公司 | Vehicle balance shaft bevel gear and preparation method thereof |
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