CN101423889A - Internal spline gear quenching method and device - Google Patents
Internal spline gear quenching method and device Download PDFInfo
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- CN101423889A CN101423889A CNA2008102357713A CN200810235771A CN101423889A CN 101423889 A CN101423889 A CN 101423889A CN A2008102357713 A CNA2008102357713 A CN A2008102357713A CN 200810235771 A CN200810235771 A CN 200810235771A CN 101423889 A CN101423889 A CN 101423889A
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- mandrel
- quenching
- wheel gear
- spline wheel
- inside spline
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- 238000010791 quenching Methods 0.000 title claims abstract description 44
- 230000000171 quenching effect Effects 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010923 batch production Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a quenching method and a quenching device for an internal spline gear. Firstly, placing the internal spline gear in a rotary hearth type heating furnace without restraint and heating to 820-880 ℃; keeping the heated internal spline gear in the furnace for heat preservation for 45-90 min; taking out the internal spline gear from the rotary hearth heating furnace, directly sleeving the gear surface upwards on the mandrel, and feeding the gear surface upwards into a quenching medium for quenching. The quenching device comprises a mandrel, a tray, an arm rod and a lifting mechanism. The internal spline gear is heated and insulated in a free state, the mandrel is plugged and quenched after being taken out, and the quenching shrinkage deformation is accurately controlled by the preset size and shape of the mandrel. The mandrel is not heated, so that the rigidity is good, the deformation resistance is strong, and the energy consumption is low. The mandrel is repeatedly used, and the shape, size and precision consistency of the quenched product are good.
Description
Technical field
The present invention relates to a kind of hardware heat-treating methods and device, specifically, the present invention relates to a kind of method and device of controlling the inside spline wheel gear heat treatment deformation.
Background technology
It is use always in the mechanical connecting structure a kind of that spline connects, and it has the axially movable characteristics of phase accessory, is widely used in the various speed change mechanisms.The workmanship of inside and outside spline directly influences the quality that moves axially that it matches.Under the regular situation, male spline is located on the outer wall, and the spline shaft structure of this kind structure is well-balanced, profile is regular, easily realizes design accuracy in machining and heat treatment process.Inside spline wheel gear is complicated with respect to spline shaft structure, and each section sectional dimension differs greatly, and each section deflection is unequal in quenching process, makes internal splined hole easily produce tapering or ellipse.The present age, the gear production generally adopted plug cored axle to reduce the inside spline wheel gear quenching shrinkage strain, this method by control with join the internal spline path tolerance clearance realize the control of deflection.But this method and device have following deficiency:
1, needs to be equipped with the mandrel of sufficient amount, could satisfy batch production requirements, the production cost height;
2, mandrel with joining inside spline wheel gear advance stove heating and quench, waste energy;
3, mandrel itself also deforms in heating, quenching process, the spline manufacturing accuracy of inside spline wheel gear that influence is joined, and regularly reconditioning mandrel workload is big.
Summary of the invention
The present invention is primarily aimed at the internal spline heat treatment deformation that prior art can not accurately be controlled inside spline wheel gear, and the high deficiency of production cost, a kind of inside spline wheel gear quenching method and device are proposed, this method is easy, energy-conservation, production cost is low, used apparatus structure is simple, only needs several mandrels just can satisfy batch process.
The present invention is achieved through the following technical solutions technical object.
Inside spline wheel gear quenching method and device, it divides heating, insulation, suit mandrel and four steps of quenching implement, and practical application follows these steps to and processing parameter carries out:
A, heating
At first inside spline wheel gear (1) is not had constraint and place rotary hearth continous furnance internal heating to 820～880 ℃;
B, insulation
The inside spline wheel gear that has heated (1) is stayed insulation 45～90min in the stove;
C, suit mandrel and quenching
Take out inside spline wheel gear (1) from rotary hearth continous furnance, the flank of tooth directly overlaps up and installs on the mandrel (2), is sent in the quenchant in the lump by quenching device and quenches.
From stove, take out inside spline wheel gear, remake quenching after being sleeved on mandrel through heating, insulation.The shaft part outer wall of mandrel is provided with around the shape spiral groove, and end face of flange is provided with axially extending bore, all is to design for improving the quenchant circulation.The mandrel shaft part is provided with the radial deformation of certain tapering with the control internal spline.
The present invention compared with prior art has following positively effect:
1, inside spline wheel gear heats under free state and is incubated, and is sleeved on after the taking-up and remakes quenching on the mandrel, utilizes mandrel preset size and shape accurately to control the heat treatment deformation amount;
2, mandrel does not heat, good rigidly, and non-deformability is strong, and save energy;
3, mandrel does not heat, and no thermal distortion can recycle for a long time, the internal spline shape of quenched products, size, precision high conformity.
Description of drawings
Accompanying drawing is a quenching device synoptic diagram of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the invention will be further described.
This invention inside spline wheel gear quenching method, it divides heating, insulation, suit mandrel and four steps of quenching implement:
1, heating
At first inside spline wheel gear 1 is not had constraint and place rotary hearth continous furnance internal heating to 820～880 ℃;
2, insulation
The inside spline wheel gear 1 that has heated is stayed insulation 45～90min in the stove;
3, suit mandrel and quenching
Take out inside spline wheel gear 1 from rotary hearth continous furnance, the flank of tooth overlaps up and installs on the mandrel 2, is sent in the quenchant in the lump by quenching device and quenches.
Internal spline quenching device in this invention comprises mandrel 2, pallet 3, armed lever 4 and hoisting appliance 5.Described mandrel 2 is made of flange and axle head, and the shaft part outer wall is provided with around spiral groove 2.1, uniform 4～16 axially extending bores 2.2 on the end face of flange, and the end face of flange middle part is provided with axial location hole 2.3.
Present embodiment is the inside spline wheel gear in the car differential mechanism, and the back technical requirements of quenching only allows internal spline taper error≤0.05mm, ellipticity error≤0.03mm.Because it is this each section of gear sectional dimension does not wait, all overproof with prior art quenching back internal spline tapering and ovality.Use inside spline wheel gear quenching method of the present invention and device, can control error in the permissible value scope.Inside spline wheel gear quenching method divides heating, insulation, suit mandrel and four steps of quenching implement.Heating process is to carry out in rotary hearth continous furnance, at first inside spline wheel gear 1 is not had constraint and places in the rotary hearth continous furnance, is warming up to 830 ± 10 ℃ in the stove; Implement the insulation operation then, the inside spline wheel gear 1 that has heated is stayed be incubated 50 ± 5min in the rotary hearth continous furnance.Take out inside spline wheel gear 1 from rotary hearth continous furnance successively, by shown in the accompanying drawing inside spline wheel gear 1 cover being installed on the mandrel 2, the flank of tooth of inside spline wheel gear 1 up.Mandrel 2 is with the axial location hole 2.3 at flange middle part and bearing pin 3.1 running fit of pallet 3, and pallet 3 is connected with hoisting appliance 5 by fixedly connected armed lever 4.Hoisting appliance 5 descends during quenching, driving the inside spline wheel gear 1 and the mandrel 2 that are held in the palm on the pallet 3 together quenches in the dip quench medium, quench when finishing, hoisting appliance 5 rises and drives pallet 3 and inside spline wheel gear 1 that is held in the palm and mandrel 2, make it to break away from quenchant, take out hard-tempered inside spline wheel gear 1, change the outfit and in rotary hearth continous furnance, take out another inside spline wheel gear 1, do the quenching of another round.Mandrel 2 shaft parts in the present embodiment are the tapering axle, and its free end is than the little 0.05mm of flanged end.Around spiral groove 2.1, uniform 4 axially extending bores 2.2 are convenient to quenchant and are flowed on the end face of flange, improve hardening capacity, homogeneity on the shaft part outer wall.Mandrel 2 does not heat among the present invention, with insert in the quenchant in the lump after the inside spline wheel gear 1 that has heated matches, owing to the existence of mandrel 2 limits inside spline wheel gear 1 quenching shrinkage strain, internal splined hole size, shape and precision after the quenching directly are controlled by mandrel 2, internal spline taper error≤0.04mm after present embodiment quenches, ellipticity error≤0.02mm.Same mandrel 2 can use repeatedly, and the internal splined hole size, shape and the precision that match keep consistency, and the exchange performance is good.
Present embodiment is the inside spline wheel gear of 15T heavy-duty car, except that volume greater than the embodiment 1, its internal splined hole is the double step formula, join mandrel 2 double step formula shaft part for identical shaped and size, on the shaft part outer wall around spiral groove 2.1, uniform 16 axially extending bores 2.2 on the end face of flange.The present embodiment quenching method is identical with embodiment 1, and only setting Heating temperature is 870 ± 10 ℃, and soaking time is 85 ± 5min, and its technique effect is identical with embodiment 1.
Claims (4)
1, a kind of inside spline wheel gear quenching method, it divides heating, insulation, suit mandrel and four steps of quenching implement, and practical application follows these steps to and processing parameter carries out:
A, heating
At first inside spline wheel gear (1) is not had constraint and place rotary hearth continous furnance internal heating to 820～880 ℃;
B, insulation
The inside spline wheel gear that has heated (1) is stayed insulation 45～90min in the stove;
C, suit mandrel and quenching
Take out inside spline wheel gear (1) from rotary hearth continous furnance, the flank of tooth directly overlaps up and installs on the mandrel (2), is sent in the quenchant in the lump by quenching device and quenches.
2, a kind of inside spline wheel gear quenching device of supporting claim 1, this device comprise mandrel (2), pallet (3), armed lever (4) and hoisting appliance (5); Described mandrel (2) is made of flange and axle head; It is characterized in that: the shaft part outer wall of described mandrel (2) is provided with axial location hole (2.3) around spiral groove (2.1) in the middle part of uniform 4～16 axially extending bores (2.2) on the end face of flange, end face of flange.
3, inside spline wheel gear quenching device according to claim 2 is characterized in that: the shaft part of described mandrel (2) is the tapering axle.
4, inside spline wheel gear quenching device according to claim 2 is characterized in that: the shaft part of described mandrel (2) is the step axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102357713A CN101423889A (en) | 2008-11-27 | 2008-11-27 | Internal spline gear quenching method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102357713A CN101423889A (en) | 2008-11-27 | 2008-11-27 | Internal spline gear quenching method and device |
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| Publication Number | Publication Date |
|---|---|
| CN101423889A true CN101423889A (en) | 2009-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102357713A Pending CN101423889A (en) | 2008-11-27 | 2008-11-27 | Internal spline gear quenching method and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888610A (en) * | 2012-10-24 | 2013-01-23 | 哈尔滨东安发动机（集团）有限公司 | Thermal treatment method for internal spline gear with small modulus |
| CN104328248A (en) * | 2014-10-28 | 2015-02-04 | 重庆永达精密机械有限公司 | Quenching method for preventing major diameter sizes at two ends of splined hole of internal spline gear from being inconsistent |
| CN104358777A (en) * | 2014-10-28 | 2015-02-18 | 重庆永达精密机械有限公司 | Quenching core shaft |
| CN108265170A (en) * | 2018-01-12 | 2018-07-10 | 中国航发哈尔滨东安发动机有限公司 | The method for promoting profile accuracy after internal spline is heat-treated |
| CN110964900A (en) * | 2019-12-30 | 2020-04-07 | 綦江齿轮传动有限公司 | Speed changer gear die pressing quenching method |
| CN115595413A (en) * | 2022-10-31 | 2023-01-13 | 东风汽车零部件（集团）有限公司刃量具分公司（Cn） | Heat treatment tool |
-
2008
- 2008-11-27 CN CNA2008102357713A patent/CN101423889A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102888610A (en) * | 2012-10-24 | 2013-01-23 | 哈尔滨东安发动机（集团）有限公司 | Thermal treatment method for internal spline gear with small modulus |
| CN104328248A (en) * | 2014-10-28 | 2015-02-04 | 重庆永达精密机械有限公司 | Quenching method for preventing major diameter sizes at two ends of splined hole of internal spline gear from being inconsistent |
| CN104358777A (en) * | 2014-10-28 | 2015-02-18 | 重庆永达精密机械有限公司 | Quenching core shaft |
| CN108265170A (en) * | 2018-01-12 | 2018-07-10 | 中国航发哈尔滨东安发动机有限公司 | The method for promoting profile accuracy after internal spline is heat-treated |
| CN110964900A (en) * | 2019-12-30 | 2020-04-07 | 綦江齿轮传动有限公司 | Speed changer gear die pressing quenching method |
| CN110964900B (en) * | 2019-12-30 | 2021-08-31 | 綦江齿轮传动有限公司 | Speed changer gear die pressing quenching method |
| CN115595413A (en) * | 2022-10-31 | 2023-01-13 | 东风汽车零部件（集团）有限公司刃量具分公司（Cn） | Heat treatment tool |
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Open date: 20090506 |