CN114029514A - Gear inner hole drum shape optimization method - Google Patents
Gear inner hole drum shape optimization method Download PDFInfo
- Publication number
- CN114029514A CN114029514A CN202111529318.5A CN202111529318A CN114029514A CN 114029514 A CN114029514 A CN 114029514A CN 202111529318 A CN202111529318 A CN 202111529318A CN 114029514 A CN114029514 A CN 114029514A
- Authority
- CN
- China
- Prior art keywords
- inner hole
- gear
- drum shape
- heat treatment
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005457 optimization Methods 0.000 title description 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000005255 carburizing Methods 0.000 claims abstract description 5
- 238000010791 quenching Methods 0.000 claims abstract description 5
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
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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
-
- 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
- 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
- C23C8/06—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 using gases
- C23C8/08—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 using gases only one element being applied
- C23C8/20—Carburising
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a method for optimizing the drum shape of an inner hole of a gear, which comprises the steps of preparing a plurality of straight inner hole gears in advance, then carrying out a heat treatment carburizing and quenching test, detecting the size of the inner hole through three coordinates after the inner hole of the gear is shrunk and deformed, detecting the difference between the minimum diameter size of the inner hole of the gear and the middle point of the length direction of the inner hole, and detecting the difference (drum shape quantity) between the diameter of the part and the diameter of the inner hole, and processing the part into the required drum shape according to the data, so that the drum shape quantity of the inner hole of the gear after heat treatment meets the requirement, and the drum shape high point position is just positioned in the middle of the length direction of the inner hole; the invention turns the hot front inner hole of the gear into the required drum-shaped hole, and after heat treatment, the turned hole offsets the diameter deviation caused by heat treatment, so that the whole diameter deviation of the hole is reduced, and the quality and the yield of the gear are improved.
Description
Technical Field
The invention relates to a method for processing an inner hole of a gear, in particular to a method for optimizing the drum shape of the inner hole of the gear during gear manufacturing.
Background
The gear needs to be subjected to heat treatment after being pressed, and because the inner hole of the gear is deformed and the two ports of the hole are enlarged in the heat treatment process, the diameter deviation between the two ends of the hole and the inner center is large, and the quality and the yield of the gear are influenced.
Disclosure of Invention
The invention relates to a method for optimizing the drum shape of an inner hole of a gear, which can correct the deviation of the diameter of the gear hole caused by heat treatment.
In order to realize the purpose, the method adopted by the invention is as follows: a method for optimizing the crowning of an internal bore of a gear, the method comprising the steps of:
(1) preparing a plurality of gears with straight inner holes;
(2) carrying out a heat treatment carburizing and quenching test, and shrinking and deforming the inner hole of the gear;
(3) detecting the size of the inner hole of the gear by using a three-coordinate detector, detecting the difference between the minimum diameter size point of the inner hole of the gear and the middle point in the length direction of the inner hole, and the difference (drum shape quantity) between the minimum diameter point and the maximum diameter point of the inner hole,
(4) taking the average value of a plurality of gears to determine the difference value between the minimum point and the middle point of the inner hole diameter and the drum shape quantity of the inner hole;
(5) according to the data, the shape of the inner hole of the gear is optimized before heat treatment, and the gear is processed into a required drum shape;
(6) and carrying out heat treatment on the gear.
The beneficial effects are as follows: the invention turns the hot front inner hole of the gear into the required drum-shaped hole, and after heat treatment, the turned hole offsets the diameter deviation caused by heat treatment, so that the whole diameter deviation of the hole is reduced, and the quality and the yield of the gear are improved.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of the detection points of the present invention;
fig. 2 is a schematic illustration of a process after offset crowning.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
A method for optimizing the crowning of a gear bore as shown in fig. 1, the method comprising the steps of:
(1) preparing a plurality of gears with straight inner holes;
(2) carrying out a heat treatment carburizing and quenching test, and shrinking and deforming the inner hole of the gear;
(3) detecting the size of the inner hole of the gear by using a three-coordinate detector, detecting the difference between the minimum diameter size point of the inner hole of the gear and the middle point in the length direction of the inner hole, and the difference (drum shape quantity) between the minimum diameter point and the maximum diameter point of the inner hole,
(4) taking the average value of a plurality of gears to determine the difference value between the minimum point and the middle point of the inner hole diameter and the drum shape quantity of the inner hole;
(5) according to the data, the shape of the inner hole of the gear is optimized before heat treatment, and the gear is processed into a required drum shape;
(6) and carrying out heat treatment on the gear.
In the specific embodiment, as shown in fig. 1 and fig. 2, when sample measurement is performed in advance, a plurality of straight inner hole gears are prepared in advance, then a heat treatment carburizing and quenching test is performed, after the inner hole of the gear is shrunk and deformed, the size of the inner hole is detected through three coordinates, the difference Δ d1 (Δ d1= d medium-d small) between the minimum point d of the diameter size of the inner hole of the gear and the middle point d of the length direction of the inner hole and the difference Δ d2 (drum shape) (Δ d2= d large-d small) between the minimum point d of the diameter size of the inner hole and the maximum point d of the diameter of the inner hole are detected, and the average value of the plurality of gears is taken to determine the difference Δ d1 between the minimum point and the middle point of the diameter of the inner hole and the drum shape Δ d2 of the inner hole. The method comprises the steps of finding out positions where a minimum diameter point d is small and a maximum diameter point d is large from data of diameter changes of a plurality of gears, determining positions where the maximum diameter point d is large and the minimum diameter point d is small according to delta d1 and delta d2 of the data of a plurality of groups, a longitudinal position L1 generated by the minimum diameter and a longitudinal position L2 generated by the maximum diameter, optimizing the shape of an inner hole of the gear before heat treatment according to the data, processing the gear into a required drum shape during large-batch production, intentionally making the maximum diameter point d small and the minimum diameter point d small, processing a d small diameter according to delta d1 and L1, then processing a d large compensation diameter according to the d small compensation diameter, offsetting deformation after heat treatment, enabling the drum shape quantity of the gear inner hole after heat treatment to meet requirements, and enabling the drum shape high to be located at a middle position in the length direction of the inner hole.
The invention turns the hot front inner hole of the gear into the required drum-shaped hole, and after heat treatment, the turned hole offsets the diameter deviation caused by heat treatment, so that the whole diameter deviation of the hole is reduced, and the quality and the yield of the gear are improved.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (1)
1. A method for optimizing the crowning of an inner hole of a gear is characterized by comprising the following steps:
(1) preparing a plurality of gears with straight inner holes;
(2) carrying out a heat treatment carburizing and quenching test, and shrinking and deforming the inner hole of the gear;
(3) detecting the size of the inner hole of the gear by using a three-coordinate detector, detecting the difference between the minimum diameter size point of the inner hole of the gear and the middle point in the length direction of the inner hole, and the difference (drum shape quantity) between the minimum diameter point and the maximum diameter point of the inner hole,
(4) taking the average value of a plurality of gears to determine the difference value between the minimum point and the middle point of the inner hole diameter and the drum shape quantity of the inner hole;
(5) according to the data, the shape of the inner hole of the gear is optimized before heat treatment, and the gear is processed into a required drum shape;
(6) and carrying out heat treatment on the gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111529318.5A CN114029514B (en) | 2021-12-15 | 2021-12-15 | Drum-shaped optimization method for inner hole of gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111529318.5A CN114029514B (en) | 2021-12-15 | 2021-12-15 | Drum-shaped optimization method for inner hole of gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114029514A true CN114029514A (en) | 2022-02-11 |
| CN114029514B CN114029514B (en) | 2023-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111529318.5A Active CN114029514B (en) | 2021-12-15 | 2021-12-15 | Drum-shaped optimization method for inner hole of gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114029514B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1130514A (en) * | 1997-07-11 | 1999-02-02 | Polyplastics Co | Method for calculating accuracy of resin-formed gear, and method for manufacturing gear mold using it, and resin-formed gear |
| US20010020420A1 (en) * | 2000-01-05 | 2001-09-13 | Heinz-Michael Zaoralek | Roll assembly and roll |
| KR20020058733A (en) * | 2000-12-30 | 2002-07-12 | 이계안 | Method of working a chamfer for holes |
| JP2006009118A (en) * | 2004-06-29 | 2006-01-12 | Sumitomo Denko Shoketsu Gokin Kk | Method for producing iron-based sintered mechanical component |
| CN110904306A (en) * | 2020-01-02 | 2020-03-24 | 重庆齿轮箱有限责任公司 | Part hole shrinkage method and part hole shrinkage tool |
| CN111020457A (en) * | 2019-11-26 | 2020-04-17 | 中国航发中传机械有限公司 | Carburizing heat treatment control method for spiral bevel gear |
-
2021
- 2021-12-15 CN CN202111529318.5A patent/CN114029514B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1130514A (en) * | 1997-07-11 | 1999-02-02 | Polyplastics Co | Method for calculating accuracy of resin-formed gear, and method for manufacturing gear mold using it, and resin-formed gear |
| US20010020420A1 (en) * | 2000-01-05 | 2001-09-13 | Heinz-Michael Zaoralek | Roll assembly and roll |
| KR20020058733A (en) * | 2000-12-30 | 2002-07-12 | 이계안 | Method of working a chamfer for holes |
| JP2006009118A (en) * | 2004-06-29 | 2006-01-12 | Sumitomo Denko Shoketsu Gokin Kk | Method for producing iron-based sintered mechanical component |
| CN111020457A (en) * | 2019-11-26 | 2020-04-17 | 中国航发中传机械有限公司 | Carburizing heat treatment control method for spiral bevel gear |
| CN110904306A (en) * | 2020-01-02 | 2020-03-24 | 重庆齿轮箱有限责任公司 | Part hole shrinkage method and part hole shrinkage tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114029514B (en) | 2023-12-08 |
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