CN108950170A - Car deceleration device gear carburizing quenching deformation control method and application - Google Patents
Car deceleration device gear carburizing quenching deformation control method and application Download PDFInfo
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- CN108950170A CN108950170A CN201810765876.3A CN201810765876A CN108950170A CN 108950170 A CN108950170 A CN 108950170A CN 201810765876 A CN201810765876 A CN 201810765876A CN 108950170 A CN108950170 A CN 108950170A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention provides car deceleration device gear carburizing quenching deformation control methods, this method first determines the magnitude of reversed correction of the flank shape, reversed correction of the flank shape is carried out to the end face of gear, the compensation mechanism that the auxiliary hardened structure of redesign preparation and the gear matches, and in the auxiliary Board position of gear that compensation mechanism is assemblied in after reversed correction of the flank shape, the gear assembled is finally subjected to carburizing and quenching.Deformation control method provided by the invention can be such that the bounce of gear heat treatment rear end face is decreased within 0.06mm, compensation mechanism structure of the invention is simple, handling ease, it is easy to spread, the method that compensation mechanism and reversed correction of the flank shape combine, reduce the expense of profile shifted gear after factory is heat-treated, shorten the correction of the flank shape time, reduce profiling quantity, save the use of raw steel, method of the invention first carries out reversed correction of the flank shape, it redesigns and is heat-treated after assembling compensation mechanism, compared with being first heat-treated correction of the flank shape again, not only reduce profiling quantity, also avoid influence of the correction of the flank shape to carburized layer again after being heat-treated.
Description
Technical field
The invention belongs to be machined and technical field of heat treatment, and in particular to the deformation of car deceleration device gear carburizing quenching
Control method and application.
Background technique
With the fast development of technology, requirements at the higher level are proposed for the properties of pinion steel.In order to meet high-performance
The high bearing capacity of pinion steel, including top load, high speed, high temperature resistant, lightweight, miniaturization, low noise, high quality, longevity
Life and low cost etc. require, and most of gear will carry out complicated heat treatment process, such as at carburizing, carbo-nitriding and nitridation
Reason.However, gear is during carburizing and quenching, due to the compound action of thermal stress, structural stress and part self weight, meeting
Heat-treatment distortion is generated, so that gear is occurred end face run-out after carburizing and quenching, existing gear is by carburizing and quenching warm
Handle rear end face bounce seriously, end face run-out amount is 0.12~0.16mm, can seriously affect the service performance of gear.
For the deformation that control gear occurs during heat treatment, pressed frequently with increasing following process surplus, configuring quenching
Bed, hot-oil quenching or the method for isothermal hardening.Increase following process surplus, then reduces the utilization rate of gear material, Er Qiezao
At a large amount of wastes of machining working hour and cutter, the processing cost of gear is increased.It, can be substantially if configuring Quenching press
It improves the production cycle of equipment cost and gear, and individually pressure need to be made for different structure and various sizes of gear and quenched
Mold can further greatly improve the production cost of gear, reduce production efficiency.Hot-oil quenching or isothermal hardening also have certain
Equipment requirement and corresponding process operation, and this kind of complex operation, control is improper or even can aggravate gear shifting quadrant texturing.
To sum up, it is still necessary to a kind of new carburizing and quenching deformation control methods, are gone out with solving gear after carburizing and quenching
The problem of existing end face run-out.
Summary of the invention
It is of the invention to solve the problem of that end face run-out occurs after carburizing and quenching in steel gear in the prior art
The first purpose is to provide car deceleration device gear carburizing quenching deformation control method.
The second object of the present invention is to provide application of the above method in gear heat treatment.
To achieve the above object, the invention adopts the following technical scheme:
Car deceleration device gear carburizing quenching deformation control method, includes the following steps:
(1) magnitude for determining the reversed correction of the flank shape contrary with heat-treatment distortion carries out the end face of the gear reversed
Correction of the flank shape；
(2) compensation mechanism that the auxiliary hardened structure of design preparation and the gear matches；
(3) step (2) described compensation mechanism is assemblied in the auxiliary Board position of gear after the reversed correction of the flank shape of step (1)；
(4) gear for assembling step (3) carries out carburizing and quenching；
The magnitude of the reversed correction of the flank shape is the lower deviation of the gear thickness, the gear carburizing quenching rear end face bounce
Within the scope of the thickness deviation of the gear, the compensation mechanism includes mending for maximum value and the difference of the magnitude of the reversed correction of the flank shape
Repay ring.
Method of the invention can also first design the compensation mechanism for preparing and matching with the auxiliary hardened structure of the gear, then really
The magnitude of fixed reversed correction of the flank shape carries out reversed correction of the flank shape to the end face of the gear, i.e. step can be with are as follows:
(1) compensation mechanism that the auxiliary hardened structure of design preparation and the gear matches；
(2) magnitude for determining the reversed correction of the flank shape contrary with heat-treatment distortion carries out the end face of the gear reversed
Correction of the flank shape；
(3) step (1) described compensation mechanism is assemblied in the auxiliary Board position of gear after the reversed correction of the flank shape of step (2)；
(4) gear for assembling step (3) carries out carburizing and quenching；
Preferably, the compensation mechanism further comprises the fulcrum structure for limiting the compensation ring and the gear clearance
Part.
It is further preferred that the fulcrum member both ends are removably connected to the compensation ring and the gear, institute respectively
Stating fulcrum member is cylindrical body, and the cylindrical body is equipped with the circular table parallel with the cylindrical body upper and lower surface, the ring
For shape table top between compensation ring and the auxiliary plate of the gear, the thickness of the circular table is equal to the compensation ring and institute
State the gap of the auxiliary plate of gear.
It is further preferred that the quantity of the fulcrum member is at least 2.
Preferably, the gap of the auxiliary plate of the compensation ring and the gear is 0.5~1.5mm.
It is further preferred that the gap of the auxiliary plate of the compensation ring and the gear is 1mm.
Preferably, the gap of the increment of the compensation ring and the gear is 1.5~2.5mm.
It is further preferred that the gap of the increment of the compensation ring and the gear is 2mm.
Preferably, the Steel material of the compensation ring is identical as the gear.
Preferably, the compensation ring is rounded washers.
It is further preferred that the rounded washers are equipped with through-hole, the quantity of the through-hole 4~12.
Application of the above method in gear heat treatment.
Since in hardening phase, the cooling velocity of gear different location is uneven, thus phase transformation when occurring different, therefore tooth
Wheel mainly generates heat-treatment distortion in hardening phase, deforms seriously after leading to gear heat treatment.Method of the invention is first true
Determine profiling quantity, reversed correction of the flank shape is carried out to gear face, redesign installation compensation mechanism keeps cooling velocity when gear quenching equal
It is even, the deflection of gear is further reduced, without carrying out correction of the flank shape again to gear after heat treatment, is finally reached and reduces or even eliminates
Gear carburizing quenching is heat-treated the problem of rear end face bounce.Compared with being first heat-treated correction of the flank shape again, profiling quantity is not only reduced,
Also avoid the problem of correction of the flank shape may injure carburized layer after being heat-treated.
Beneficial effects of the present invention
1, car deceleration device gear carburizing quenching deformation control method provided by the invention can make gear heat treatment rear end
Face bounce significantly reduces, in the prior art, gear after carburizing and quenching, end face run-out amount be 0.13~
Gear face can be beated and be decreased within 0.06mm using method provided by the invention by 0.16mm；
2, in method of the invention, compensation mechanism structure is simple, and handling ease is easy to spread；
3, it is carried out compared with the reversed correction of the flank shape of gear face with independent, the side that compensation mechanism of the invention+reversed correction of the flank shape combines
Method reduces the expense of profile shifted gear after factory's heat treatment, shortens the correction of the flank shape time, reduce profiling quantity, save raw steel
Use；
4, method of the invention first carries out reversed correction of the flank shape, redesigns and is heat-treated after assembling compensation mechanism, with first progress heat
Correction of the flank shape is compared again for processing, not only reduces profiling quantity, also avoids influence of the correction of the flank shape to carburized layer again after heat treatment.
Detailed description of the invention
Fig. 1 gear top view；
Fig. 2 is gear schematic cross-section, wherein 1 is gear face, and 2 be the auxiliary plate of gear；
Fig. 3 is the process route chart of gear heat treatment；
Fig. 4 is the top view for compensating ring；
Fig. 5 is the schematic cross-section for compensating ring；
Fig. 6 is the gear schematic diagram after assembly compensation ring and fulcrum member, wherein 1 is gear face, and 2 be the auxiliary of gear
Plate, 3 is compensate ring, and 4 be the increment of gear, and 5 be fulcrum member；
Fig. 7 is fulcrum member structural schematic diagram, wherein 6 be circular table；
Fig. 8 is the top view of fulcrum member.
Specific embodiment
The following is specific embodiments of the present invention, and is described with reference to the drawings and further retouches to technical solution of the present invention work
It states, however, the present invention is not limited to these examples.
Embodiment 1
A kind of car deceleration device gear carburizing quenching deformation control method is present embodiments provided, is included the following steps:
(1) magnitude for determining the reversed correction of the flank shape contrary with heat-treatment distortion carries out the end face of the gear reversed
Correction of the flank shape；
(2) compensation mechanism that the auxiliary hardened structure of design preparation and the gear matches；
(3) step (2) described compensation mechanism is assemblied in the auxiliary Board position of gear after the reversed correction of the flank shape of step (1)；
(4) gear for assembling step (3) carries out carburizing and quenching；
The magnitude of the reversed correction of the flank shape is the lower deviation of the gear thickness, the gear carburizing quenching rear end face bounce
Maximum value subtracts the magnitude of the reversed correction of the flank shape within the scope of the thickness deviation of the gear, and the compensation mechanism includes compensation
Ring.
Embodiment 2
A kind of car deceleration device gear carburizing quenching deformation control method is present embodiments provided, is included the following steps:
(1) magnitude for determining the reversed correction of the flank shape contrary with heat-treatment distortion carries out the end face of the gear reversed
Correction of the flank shape；
(2) compensation mechanism that the auxiliary hardened structure of design preparation and the gear matches；
(3) step (2) described compensation mechanism is assemblied in the auxiliary Board position of gear after the reversed correction of the flank shape of step (1)；
(4) gear for assembling step (3) carries out carburizing and quenching；
The magnitude of the reversed correction of the flank shape is the lower deviation of the gear thickness, the gear carburizing quenching rear end face bounce
Maximum value subtracts the magnitude of the reversed correction of the flank shape within the scope of the thickness deviation of the gear, and the compensation mechanism includes compensation
Ring.
The compensation mechanism further comprises fulcrum member, and the fulcrum member is the cylindrical body containing circular table, institute
It states circular table to be set between the upper and lower surface of the cylindrical body, the quantity of fulcrum member is at least 2.
Embodiment 3
A kind of car deceleration device gear carburizing quenching deformation control method is present embodiments provided, is included the following steps:
(1) compensation mechanism that the auxiliary hardened structure of design preparation and the gear matches；
(2) magnitude for determining the reversed correction of the flank shape contrary with heat-treatment distortion carries out the end face of the gear reversed
Correction of the flank shape；
(3) step (1) described compensation mechanism is assemblied in the auxiliary Board position of gear after the reversed correction of the flank shape of step (2)；
(4) gear for assembling step (3) carries out carburizing and quenching；
The magnitude of the reversed correction of the flank shape is the lower deviation of the gear thickness, the gear carburizing quenching rear end face bounce
Maximum value subtracts the magnitude of the reversed correction of the flank shape within the scope of the thickness deviation of the gear, and the compensation mechanism includes compensation
Ring.
The compensation mechanism further comprises fulcrum member, and the fulcrum member both ends are removably connected to the benefit respectively
Ring and the gear are repaid, the fulcrum member is cylindrical body, and the cylindrical body is equipped with parallel with the cylindrical body upper and lower surface
Circular table, the circular table is between compensation ring and the auxiliary plate of the gear, the thickness of the circular table
Equal to the gap of the compensation ring and the auxiliary plate of the gear, the quantity of fulcrum member is at least 2.
Embodiment 4
Present embodiments provide the practical application of car deceleration device gear carburizing quenching deformation control method, the method is as follows:
1, the reversed correction of the flank shape magnitude of car deceleration device gear is determined, specifically:
Fig. 1 show the top view of 8620h gear, and Fig. 2 show the sectional view of the gear, is research pair with the gear
As carburizing quenching process according to Fig.3, is heat-treated gear, after heat treatment, by three-coordinates measuring machine to gear
End face 1 is measured, and show that the beating scope of gear face 1 is 0.13~0.16mm, i.e. gear carburizing quenching rear end face is jumped
Dynamic maximum value is 0.16mm, and the lower deviation of the technical requirements of combination gear, gear thickness is 0.1mm, determines the anti-of the gear
It is 0.1mm to the magnitude of correction of the flank shape.
The determination of the reversed correction of the flank shape magnitude of this step, can be by carrying out actual heat treatment to gear to learn gear face
1 beating scope can also learn the beating scope of gear face 1 by the method for emulation.
2, according to the reversed correction of the flank shape magnitude of gear of preceding step determination, reversed correction of the flank shape is carried out to not thermally treated gear face；
3, the compensation mechanism to match with the auxiliary hardened structure of gear is designed, compensation mechanism includes compensation ring, and Fig. 4 is compensation ring
Top view, compensation ring be rounded washers, Fig. 5 be compensate ring sectional view, Fig. 6 be gear assembly compensation ring after schematic diagram.
Specifically:
Increase compensation ring 3 in auxiliary 2 position of plate of gear, the gap for compensating ring 3 and the auxiliary plate 2 of gear is 1mm, compensates ring 3 and tooth
The gap of gear teeth end 4 is 2mm, compensates ring material 8620h.
Compensation mechanism further comprises branch component 5, and fulcrum member 5 is the cylindrical body containing circular table 6, institute's shape table top 6
It is set between the upper and lower surface of cylindrical body.
Fig. 7 is the schematic diagram of fulcrum member 5, and Fig. 8 is the top view of fulcrum member.In Fig. 7, the thickness etc. of circular table 6
In the gap of compensation ring and the auxiliary plate of gear, play the role of gear and compensation ring positioning.
4, in the auxiliary Board position of gear compensation mechanism being assemblied in after reversed correction of the flank shape, carburizing quenching process as shown in Figure 3
Gear is heat-treated.
After the above method is heat-treated, gear face bounce is less than 0.06mm.
In the present embodiment, such as first to car deceleration device gear carburizing quenching, the bounce model of gear face is found after heat treatment
It encloses for greater than 0.14mm, not only profiling quantity is greater than first reversed correction of the flank shape and carries out being heat-treated required profiling quantity again, in addition, carburizing and quenching
Correction of the flank shape can injure gear wheel carburization layer again.
Claims (10)
1. car deceleration device gear carburizing quenching deformation control method, which comprises the steps of:
(1) magnitude for determining the reversed correction of the flank shape contrary with heat-treatment distortion carries out reversed correction of the flank shape to the end face of the gear；
(2) compensation mechanism that the auxiliary hardened structure of design preparation and the gear matches；
(3) step (2) described compensation mechanism is assemblied in the auxiliary Board position of gear after the reversed correction of the flank shape of step (1)；
(4) gear for assembling step (3) carries out carburizing and quenching；
The magnitude of the reversed correction of the flank shape is the lower deviation of the gear thickness, the maximum of the gear carburizing quenching rear end face bounce
Within the scope of the thickness deviation of the gear, the compensation mechanism includes compensation for value and the difference of the magnitude of the reversed correction of the flank shape
Ring.
2. car deceleration device gear carburizing quenching deformation control method according to claim 1, which is characterized in that the compensation
Mechanism further comprises the fulcrum member for limiting the compensation ring and the gear clearance.
3. car deceleration device gear carburizing quenching deformation control method according to claim 2, which is characterized in that the fulcrum
Component both ends are removably connected to the compensation ring and the gear respectively, and the fulcrum member is cylindrical body, the cylindrical body
It is equipped with the circular table parallel with the cylindrical body upper and lower surface, the circular table is located at the compensation ring and the gear
Auxiliary plate between, the thickness of the circular table is equal to the gap of the auxiliary plate of the compensation ring and the gear.
4. car deceleration device gear carburizing quenching deformation control method according to claim 3, which is characterized in that the fulcrum
The quantity of component is at least 2.
5. car deceleration device gear carburizing quenching deformation control method according to claim 1, which is characterized in that the compensation
The gap of the auxiliary plate of ring and the gear is 0.5~1.5mm.
6. car deceleration device gear carburizing quenching deformation control method according to claim 1, which is characterized in that the compensation
The gap of the increment of ring and the gear is 1.5~2.5mm.
7. car deceleration device gear carburizing quenching deformation control method according to claim 1, which is characterized in that the compensation
The Steel material of ring is identical as the gear.
8. car deceleration device gear carburizing quenching deformation control method according to claim 1, which is characterized in that the compensation
Ring is rounded washers.
9. car deceleration device gear carburizing quenching deformation control method according to claim 8, which is characterized in that the circle
Washer is equipped with through-hole, and the depth of the through-hole and the thickness of rounded washers are identical, the quantity of the through-hole 4~12.
10. such as application of any one of claim 1~9 the method in gear heat treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810765876.3A CN108950170B (en) | 2018-07-12 | 2018-07-12 | Automobile reducer gear carburizing and quenching deformation control method and application |
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| CN201810765876.3A CN108950170B (en) | 2018-07-12 | 2018-07-12 | Automobile reducer gear carburizing and quenching deformation control method and application |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110408762A (en) * | 2018-07-25 | 2019-11-05 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of processing method reducing the deformation of helical gear carburizing and quenching |
| CN113046524A (en) * | 2021-03-05 | 2021-06-29 | 苏州市旭飞精密机械有限公司 | Heat treatment process for traction ring |
| CN114107629A (en) * | 2021-11-26 | 2022-03-01 | 中国航发北京航空材料研究院 | Full-size deformation control method for driven spiral bevel gear |
| CN114317924A (en) * | 2021-12-31 | 2022-04-12 | 昆山铂达峰精密机械有限公司 | Method for controlling deformation of valve core internal thread during heat treatment |
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| CN113046524B (en) * | 2021-03-05 | 2024-02-27 | 苏州奥轩精密科技有限公司 | Traction ring heat treatment process |
| CN114107629A (en) * | 2021-11-26 | 2022-03-01 | 中国航发北京航空材料研究院 | Full-size deformation control method for driven spiral bevel gear |
| CN114317924A (en) * | 2021-12-31 | 2022-04-12 | 昆山铂达峰精密机械有限公司 | Method for controlling deformation of valve core internal thread during heat treatment |
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