CN109899482A - A kind of manufacturing process of compound gear and made gear and application thereof - Google Patents
A kind of manufacturing process of compound gear and made gear and application thereof Download PDFInfo
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- CN109899482A CN109899482A CN201910315942.1A CN201910315942A CN109899482A CN 109899482 A CN109899482 A CN 109899482A CN 201910315942 A CN201910315942 A CN 201910315942A CN 109899482 A CN109899482 A CN 109899482A
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- metal
- gear
- resin
- hub portion
- manufacturing process
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Abstract
The present invention discloses a kind of manufacturing process of metal/resin compound gear, comprising the following steps: 1) manufactures integrally formed wheel axle portion by metal and hub portion forms the metal core of gear；2) resin gear ring portion is formed in the peripheral part casting resin of the hub portion of the metal core.Manufacturing process of the invention improves processing efficiency, and significantly reduces manufacturing cost.And metal/resin compound gear made of technique constructed in accordance, have many advantages, such as that cooperation drive connection is good, precision is high, output torque is high, run smoothly and noise is small.
Description
Technical field
The present invention relates to gear technique fields, in particular to metal/resin compound gear technical field, relate more specifically to
A kind of manufacturing process of compound gear and the compound gear being produced from it and application thereof.
Background technique
Gear drive is a kind of principal mode for transmitting machine power and movement, gear-driven efficiency is high, transmission ratio is stable,
It is compact-sized, thus be widely used.In the world, the lightweight of power transmission gear device forward direction, high speed, standardization direction hair
Exhibition.
Metal gear engaged caused by transmission error and the tooth butt caused by backlash etc. due to, there is vibration and make an uproar
The problem of sound.Compared with metal gear, not only production cost is low for plastic gear, moulding process is good, high production efficiency, also has matter
The advantages that amount is light, stable transmission, vibration-absorbing denoising and wearability are good.In some application fields of gear, useful plastic gear substitution
The development trend of metal gear.However, plastic gear is most important the disadvantage is that intensity is relatively low.When with plastic gear, face
One of critical issue faced is exactly whether intensity meets needs.
With the release of the high performance resins such as high intensity, high abrasion, further plastic gear is pushed to send out to high load capacity direction
Exhibition, application field are further widened.Currently, plastic gear is widely used to the fields such as automobile, household electrical appliances, office appliance.In vapour
The plastic gear applied in vehicle field electronic power assist steering system (EPS) is the successful case that metal gear is replaced with plastic gear
Example.
EPS gear is the primary drive component in automotive electronics power-assisted steering device.It is right with the rapid development of automobile industry
The requirement of EPS gear is also higher and higher.It is required that gear vibration and low noise, can resistance torque and axial force, there is durability
And fatigue resistance, the especially requirement to dimensional stability and precision are higher and higher.To improve bearing capacity, EPS gear is general
Use the metal/resin compound gear including interior metal wheel hub and external resin gear ring.
In the prior art, the manufacturing process of metal/resin compound gear is usually: first production is provided centrally with the gold of axis hole
Belong to wheel hub；Peripheral part by resin injection molding in metal wheel hub forms teeth portion；Wheel shaft is installed in the axis hole of the heart in the hub
Portion, wheel axle portion and the press-fitting of hub portion tight interference are realized and are fixed, to drive plastic gear rotation by the rotation of wheel axle portion.
However, due to being fixed by close-fitting relationship between wheel axle portion and hub portion, if the rotation speed of wheel axle portion
Spend it is fast, take turns the close-fitting relationship between axle portion and hub portion may be unable to reach wheel axle portion drive plastic gear requirement and
Plastic gear is caused to be easy to happen positional shift, to cannot achieve the relationship of transmission.
Moreover, needing first to carry out annular knurl, impewdance matching processing, and the axis hole of hub portion again at wheel axle portion and hub portion cooperation
Requirement on machining accuracy is high, difficulty is big.It is high to take turns the assembly precision requirement of axle portion and hub portion during being press-fitted, takes turns axle portion axis
Line cannot be completely secured with the end face of hub portion in vertical relationship, and the coordinate force taken turns between axle portion and hub portion is also required to survey
Examination.Thus, manufacturing process is complicated, difficulty is big, higher cost.
Carried out again in addition, the teeth portion of metal/resin compound gear is obtained by injection molding, after molding wheel axle portion and
The press-fitting of hub portion, since there are the precision of rigging error, tooth can only reach 10 grades.
Summary of the invention
Aiming at the problems existing in the prior art, an object of the present invention is to provide a kind of metal/resin compound gear
Manufacturing process, with overcome the cooperation of wheel axle portion and hub portion not closely, assembly precision is low, manufacturing process is complicated, difficulty is big, cost
The defects such as high, tooth precision is low, produce that cooperation drive connection is good, precision is high, output torque is high, operation is flat with lower cost
Steady and small noise metal/resin compound gear.
For this purpose, the present invention relates to a kind of manufacturing process of metal/resin compound gear, comprising the following steps:
1) integrally formed wheel axle portion is manufactured by metal and hub portion forms the metal core of gear；
2) resin gear ring portion is formed in the peripheral part casting resin of the hub portion of the metal core.
In a kind of preferred embodiment, the wheel axle portion and hub portion one of metal core are made by way of forging or casting
It is body formed.
In a kind of preferred embodiment, making to be formed on the outside of the hub portion of metal core can reinforce connecting between resin and metal
Connect the construction of intensity.
In a kind of preferred embodiment, on the outside of hub portion be configured to radially, axially and it is tangential at least one
Reinforce the bonding strength between resin and metal on direction.
In a kind of preferred embodiment, the precision of resin gear ring portion tooth is made to reach 8 grades or more.
That it is a further object of the present invention to provide a kind of cooperation drive connections is good, precision is high, output torque is high, run smoothly and
The small metal/resin compound gear of noise.
For this purpose, the present invention relates to a kind of metal/resin compound gears, comprising: have integrally formed wheel axle portion and hub portion
Metal core；And surround the resin gear ring portion of hub portion peripheral part.
In a kind of preferred embodiment, the metal/resin compound gear is that the method manufactures through the invention.
In a kind of preferred embodiment, the precision of the tooth of the metal/resin compound gear is at 8 grades or more.
In a kind of preferred embodiment, the metal/resin compound gear can resist the torque of 450Nm or more.
Another object of the present invention is to provide use of the metal/resin compound gear for electronic power assist steering system
On the way.
Technical solution of the present invention can obtain it is following the utility model has the advantages that
1, casting resin gear ring again after being integrally formed the wheel axle portion of metal and hub portion, it is ensured that wheel axle portion and wheel
Hub axial line is coaxial, and it is vertical with the end face of hub portion also to can guarantee hub portion axis, and matches wheel axle portion and hub portion closely
It closes.
2, the higher axis hole processing of difficulty and wheel shaft assembly process are eliminated, processing efficiency is substantially increased, is greatly reduced
Manufacturing cost.
3, the precision of the tooth of metal/resin compound gear is made to be increased to 8 grades or more from 10 grades of the prior art, so as to true
Fixed gear runs smoothly and noise is small.
4, torque demand can be reached with lesser axle diameter, to save material cost.Metal/resin of the present invention is multiple
The torque of 450Nm or more can be resisted by closing gear.
5, the binding force of resin and metal is improved, the thickness of plastic gear can be reduced.
It is embodied in the specific embodiment that other beneficial effects of the invention will be described below.
Specific embodiment
The present invention provides a kind of manufacturing process of metal/resin compound gear, comprising the following steps: 1) by metal manufacture one
Body formed wheel axle portion and hub portion form the metal core of gear；2) it is molded in the peripheral part of the hub portion of the metal core
Resin forms resin gear ring portion.
Metal material for manufacturing metal core is not particularly limited, according to the purposes of gear, can be used steel or
Various alloys.It is preferable to use steel.
Resin for manufacturing gear ring portion is not particularly limited, for example, can using polyamide, polyphenylene sulfide, polyester,
The various synthetic resin such as polyether sulfone, polyacetals.It is preferred that use polyamide, such as PA6, PA66, PA46, PA6T, PA9T,
The nylon such as PA66T system resin.One or more synthetic resin can be used.It may include various additives in synthetic resin, such as
Catalyst, heat stabilizer, colorant, crosslinking agent etc..And it can according to need and carbon fiber, glass fibre etc. are added in resin
Various reinforcing fibers.
As the integrally formed method of metal core is made, various metal forming process can be used.From cost and processing essence
Degree considers, it is preferred to use the mode of forging or casting, more preferably by the way of cold forging.Hub portion and wheel axle portion are integrally formed,
The bearing torque of metal core can be improved.Meanwhile the higher axis hole processing of difficulty and wheel shaft assembly process are eliminated, it can be improved and add
Work efficiency rate, and reduce manufacturing cost.Casting resin gear ring again after integrated molding, it is ensured that wheel axle portion and hub portion axial line are same
It is vertical with the end face of hub portion also to can guarantee hub portion axis for axis, and makes to take turns axle portion and hub portion tight fit.Meanwhile it can mention
The precision of high metal/resin compounded gear tooth, to can ensure that gear runs smoothly and noise is small.
Multiple through-holes are set on the outside of the wheel hub of metal core, and resin is filled into hole when injection molding, and tree can be improved
The binding force of rouge and metal.
In another embodiment, radial direction is provided with more reinforcing ribs on one end end face of hub portion, reinforcing rib prolongs
It extends at the outer rim of hub portion.
In another embodiment, to reinforce the binding force between resin and metal wheel hub, make outside the hub portion of metal core
Side forms the construction that can reinforce bonding strength between resin and metal.It is preferred that being configured on the outside of hub portion radially, axially
And it is tangential in reinforce bonding strength between resin and metal at least one direction.The construction can use various forms,
Such as texture of various shapes, micro concavo-convex face, recess, groove, edge or concaveconvex structure etc., radially, axially and tangentially
In provide mechanical caging at least one direction.
Embodiment
The integrally formed metal core for having wheel axle portion and hub portion is manufactured with carbon steel in a manner of cold forging, takes turns the outer of axle portion
Diameter is 30mm, and the outer diameter of hub portion is 75mm, with a thickness of 4mm.Manufactured metal core is placed in injection mold.It is molded PA66
Polyamide forms the gear ring portion for surrounding the peripheral part of hub portion, and the outer diameter in gear ring portion is 94mm, with a thickness of 16mm, the number of teeth
37.Metal/resin compound gear A of the invention is made.
Comparative example
Using the metal/resin compound gear of material identical with embodiment manufacture and embodiment same size.But it uses
The manufacturing process of the prior art: first production is provided centrally with the metal wheel hub of axis hole；With Shooting Technique shape identical with embodiment
At the gear ring portion for the peripheral part for surrounding hub portion；Then axle portion is taken turns in installation in the axis hole of the heart in the hub, is press-fitted with tight interference
Mode realize fixation.The metal/resin compound gear B of comparison is made.
The parameters of metal/resin compound gear made by embodiment and comparative example are detected, measurement result is shown in table 1
In.
Table 1
From test result as can be seen that using present invention process manufacture metal/resin compound gear, tooth precision and
In terms of maximum bearing torque, all than being significantly improved using the compound gear of prior art processes manufacture.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of manufacturing process of metal/resin compound gear, comprising the following steps:
1) integrally formed wheel axle portion is manufactured by metal and hub portion forms the metal core of gear；
2) resin gear ring portion is formed in the peripheral part casting resin of the hub portion of the metal core.
2. manufacturing process according to claim 1, it is characterised in that make metal core by way of forging or casting
It takes turns axle portion and hub portion is integrally formed.
3. manufacturing process according to claim 1, it is characterised in that making to be formed on the outside of the hub portion of metal core can reinforce
The construction of bonding strength between resin and metal.
4. manufacturing process according to claim 3, it is characterised in that on the outside of hub portion be configured to radially, axially and
Reinforce the bonding strength between resin and metal in tangential at least one direction.
5. according to claim 1 to 4 any manufacturing process, it is characterised in that reach the precision of resin gear ring portion tooth
8 grades or more.
6. a kind of metal/resin compound gear, comprising: there is the metal core of integrally formed wheel axle portion and hub portion；And packet
Enclose the resin gear ring portion of hub portion peripheral part.
7. metal/resin compound gear according to claim 6, be by according to claim 1 to 5 it is any described
Manufacturing process manufacture.
8. metal/resin compound gear according to claim 6 or 7, it is characterised in that the metal/resin compound gear
Tooth precision at 8 grades or more.
9. metal/resin compound gear according to claim 6 or 7, it is characterised in that the metal/resin compound gear
The torque of 450Nm or more can be resisted.
10. being used for the use of electronic power assist steering system according to any metal/resin compound gear of claim 6 to 9
On the way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910315942.1A CN109899482A (en) | 2019-04-19 | 2019-04-19 | A kind of manufacturing process of compound gear and made gear and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910315942.1A CN109899482A (en) | 2019-04-19 | 2019-04-19 | A kind of manufacturing process of compound gear and made gear and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109899482A true CN109899482A (en) | 2019-06-18 |
Family
ID=66956060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910315942.1A Pending CN109899482A (en) | 2019-04-19 | 2019-04-19 | A kind of manufacturing process of compound gear and made gear and application thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060005652A1 (en) * | 2004-07-07 | 2006-01-12 | Koyo Seiko Co., Ltd. | Worm wheel and electric power steering system |
| CN101205967A (en) * | 2006-12-19 | 2008-06-25 | 铃木株式会社 | Plastic gear |
| CN102410356A (en) * | 2010-09-21 | 2012-04-11 | 株式会社捷太格特 | Worm drive |
| CN104246302A (en) * | 2013-02-25 | 2014-12-24 | 日本精工株式会社 | Worm wheel, and electric power steering device |
| CN105324594A (en) * | 2013-05-31 | 2016-02-10 | 高周波热錬株式会社 | Metal core for resin gear and resin gear composite member |
| CN106313423A (en) * | 2015-07-03 | 2017-01-11 | 中西金属工业株式会社 | Method for manufacturing a resin gear with a metal core |
-
2019
- 2019-04-19 CN CN201910315942.1A patent/CN109899482A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060005652A1 (en) * | 2004-07-07 | 2006-01-12 | Koyo Seiko Co., Ltd. | Worm wheel and electric power steering system |
| CN101205967A (en) * | 2006-12-19 | 2008-06-25 | 铃木株式会社 | Plastic gear |
| CN102410356A (en) * | 2010-09-21 | 2012-04-11 | 株式会社捷太格特 | Worm drive |
| CN104246302A (en) * | 2013-02-25 | 2014-12-24 | 日本精工株式会社 | Worm wheel, and electric power steering device |
| CN105324594A (en) * | 2013-05-31 | 2016-02-10 | 高周波热錬株式会社 | Metal core for resin gear and resin gear composite member |
| CN106313423A (en) * | 2015-07-03 | 2017-01-11 | 中西金属工业株式会社 | Method for manufacturing a resin gear with a metal core |
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Application publication date: 20190618 |