CN104668918A - High-precision titanium-alloy thin-walled ring gear machining method - Google Patents
High-precision titanium-alloy thin-walled ring gear machining method Download PDFInfo
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- CN104668918A CN104668918A CN201410760135.8A CN201410760135A CN104668918A CN 104668918 A CN104668918 A CN 104668918A CN 201410760135 A CN201410760135 A CN 201410760135A CN 104668918 A CN104668918 A CN 104668918A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
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Abstract
The invention relates to the field of machining, in particular to a high-precision titanium-alloy thin-walled ring gear machining method. The method includes the following steps: blank forging, rough turning of a blank, annealing, rough turning of a gear blank, heat treatment, half-finish turning, heat treatment, finish machining and heat treatment. For finish machining, a special clamp is used on a machine tool to clamp a workpiece, the gear blank is subjected to finish machining, and ring process bosses are removed layer by layer; for the last heat treatment, thermocycling is performed twice to further stabilize the structure, stabilize workpiece dimension and eliminate tooth surface stress. The machining process is simple, deformation of parts in machining is eliminated in the machining process, machining quality and dimensional accuracy of the workpiece can be guaranteed, and the dimension and quality of the workpiece are further stabilized by repeated heat treatment.
Description
Technical field
The present invention relates to field of machining, be specifically related to titanium alloy high accuracy thin wall circular gear working method.
Background technology
Problem on deformation during titanium alloy high accuracy thin wall circular Gear Processing, becomes processing difficulties.The gear of certain 6 class precision. material is titanium alloy TC 4, in outside circle relative datum, in the axiality of annular distance, both ends of the surface relative datum, the perpendicularity of annular distance all requires higher, and this gear belongs to typical thin-walled parts, poor rigidity, yielding, titanium alloy material is because thermal conductivity is little, elastic modelling quantity is little, therefore itself material stiffness is also poor, not easily processing and fabricating thin-walled parts.Titanium alloy material has the combination properties such as good mechanics, chemistry, physics: 1. light weight, but its specific strength/density is 23 ~ 27, is the highest in metal material; 2. titanium alloy material heat endurance is high, and operating temperature reaches 500 DEG C, and under 300-350 DEG C of condition, its strength ratio aluminium alloy is high 10 times; 8. corrosion stability is good, and surface energy generates fine and close firm oxide-film, and its corrosion resistance is not worse than stainless steel; 4. thermal conductivity is little, and elastic modelling quantity is little, poor rigidity, and distortion is large, should not make thin and long shafts and thin-walled parts.Titanium alloy cutting poor performance, be typical hard-cutting material, its difficult point is embodied in: 1. thermal conductivity factor is low, in working angles heat radiation and cooling effect very poor, easily machining district formation high temperature; 2. titanium alloy material elastic modelling quantity is little, and yield strength is high, and machining deformation springback capacity is large. the friction that after causing cutter, knife face is violent, stick, felt wear; 3. deformation coefficient is little is the distinguishing feature of titanic alloy machining, and the contact length be even less than before 1. chips and cutter is very short, and the cutting force in unit are is large, concentrates on cutting tips place, very easily causes tipping; 4. titanium alloy chemism is high, and at high temperature easy and cutter material reacts, and forms deposition, diffusion, glutinous cutter, burns the phenomenons such as cutter.
Summary of the invention
In order to solve the problem, the invention provides a kind of process simple, the distortion of part in processing is eliminated in process, crudy and the dimensional accuracy of workpiece can be ensured, by heat treatment repeatedly, stablize the size of workpiece and the titanium alloy high accuracy thin wall circular gear working method of quality stability further.
Titanium alloy high accuracy thin wall circular gear working method of the present invention, comprises the following steps:
The first step, rough forging, adopts forging method, forges workpiece;
Second step, rough turn blank, rough turned piece profile on lathe, removes most of unnecessary allowance, and processes annular false boss, for clamping workpiece during finish turning;
3rd step, annealing, after rough turned piece, due to inside workpiece, grain deformation, carry out annealing due to material metallographic structure and stress state imbalance, carry out recrystallization annealing, make materials re-crystallize, organized renewing balances, and inside parts stress is fully discharged;
4th step, rough turn tooth base, rough turned piece tooth base profile on lathe, and stay finish turning allowance 0.5mm-1mm;
5th step, heat treatment, carries out cold cycling, stabilizing material tissue and elimination cutting stress;
6th step, half finish turning, upper lathe, adopts scroll chuck fixation workpiece, half finish turning workpiece, and stays allowance 0.3mm-0.5mm;
7th step, heat treatment, stress relief annealing, stabilizing material tissue, eliminates cutting stress;
8th step, heat treatment, subzero treatment, eliminates the stress that material structure disperse produces, and improves the stability of workpiece in use precision;
9th step, fine finishining, lathe uses special fixture clamping workpiece, and carries out fine finishining to tooth base, and successively excises annular false boss;
Tenth step, heat treatment, cold cycling twice, further stabilizing tissue, stablizes workpiece size, eliminates flank of tooth stress.
Process of the present invention is simple, eliminates the distortion of part in processing, can ensure crudy and the dimensional accuracy of workpiece in process, by heat treatment repeatedly, stablizes size and the quality stability of workpiece further.
Detailed description of the invention
Titanium alloy high accuracy thin wall circular gear working method of the present invention, comprises the following steps:
The first step, rough forging, adopts forging method, forges workpiece;
Second step, rough turn blank, rough turned piece profile on lathe, removes most of unnecessary allowance, and processes annular false boss, for clamping workpiece during finish turning;
3rd step, annealing, after rough turned piece, due to inside workpiece, grain deformation, carry out annealing due to material metallographic structure and stress state imbalance, carry out recrystallization annealing, make materials re-crystallize, organized renewing balances, and inside parts stress is fully discharged;
4th step, rough turn tooth base, rough turned piece tooth base profile on lathe, and stay finish turning allowance 0.5mm-1mm;
5th step, heat treatment, carries out cold cycling, stabilizing material tissue and elimination cutting stress;
6th step, half finish turning, upper lathe, adopts scroll chuck fixation workpiece, half finish turning workpiece, and stays allowance 0.3mm-0.5mm;
7th step, heat treatment, stress relief annealing, stabilizing material tissue, eliminates cutting stress;
8th step, heat treatment, subzero treatment, eliminates the stress that material structure disperse produces, and improves the stability of workpiece in use precision;
9th step, fine finishining, lathe uses special fixture clamping workpiece, and carries out fine finishining to tooth base, and successively excises annular false boss;
Tenth step, heat treatment, cold cycling twice, further stabilizing tissue, stablizes workpiece size, eliminates flank of tooth stress.
When the rough turn tooth base of second time position error, utilize adjustment screw and dial gauge to correct part positioning error in 0.005 ~ 0.008 mm, re-use adjustment screw in compression part.Carry out cutting pinion side and datum hole internal diameter, with datum hole and location, gear side.Cut annular false boss two sides after axial compression, ensure that the depth of parallelism is not more than 0.008 mm, ensure the smooth handling of part.After blank finish turning, special fixture clamping workpiece, successively excises annular false boss, controls cutting parameter well.
Claims (1)
1. a titanium alloy high accuracy thin wall circular gear working method, is characterized in that, comprise the following steps:
The first step, rough forging, adopts forging method, forges workpiece;
Second step, rough turn blank, rough turned piece profile on lathe, removes most of unnecessary allowance, and processes annular false boss, for clamping workpiece during finish turning;
3rd step, annealing, after rough turned piece, due to inside workpiece, grain deformation, carry out annealing due to material metallographic structure and stress state imbalance, carry out recrystallization annealing, make materials re-crystallize, organized renewing balances, and inside parts stress is fully discharged;
4th step, rough turn tooth base, rough turned piece tooth base profile on lathe, and stay finish turning allowance 0.5mm-1mm;
5th step, heat treatment, carries out cold cycling, stabilizing material tissue and elimination cutting stress;
6th step, half finish turning, upper lathe, adopts scroll chuck fixation workpiece, half finish turning workpiece, and stays allowance 0.3mm-0.5mm;
7th step, heat treatment, stress relief annealing, stabilizing material tissue, eliminates cutting stress;
8th step, heat treatment, subzero treatment, eliminates the stress that material structure disperse produces, and improves the stability of workpiece in use precision;
9th step, fine finishining, lathe uses special fixture clamping workpiece, and carries out fine finishining to tooth base, and successively excises annular false boss;
Tenth step, heat treatment, cold cycling twice, further stabilizing tissue, stablizes workpiece size, eliminates flank of tooth stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760135.8A CN104668918A (en) | 2014-12-12 | 2014-12-12 | High-precision titanium-alloy thin-walled ring gear machining method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410760135.8A CN104668918A (en) | 2014-12-12 | 2014-12-12 | High-precision titanium-alloy thin-walled ring gear machining method |
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| CN104668918A true CN104668918A (en) | 2015-06-03 |
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| CN201410760135.8A Pending CN104668918A (en) | 2014-12-12 | 2014-12-12 | High-precision titanium-alloy thin-walled ring gear machining method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972281A (en) * | 2015-07-15 | 2015-10-14 | 江西洪都航空工业集团有限责任公司 | Machining technology of open structure part |
| CN105945530A (en) * | 2016-06-27 | 2016-09-21 | 盛瑞传动股份有限公司 | Gear chamber cover blank and gear chamber cover machining method |
| CN107199445A (en) * | 2016-03-18 | 2017-09-26 | 徐州万达回转支承有限公司 | A kind of processing technology of ultra-thin gear ring |
| CN107538188A (en) * | 2016-06-28 | 2018-01-05 | 高玉琴 | A kind of processing method of wheel blank |
| CN108747243A (en) * | 2018-08-06 | 2018-11-06 | 合肥银泉铸造有限责任公司 | A kind of planetary gear processing technology |
| CN109778092A (en) * | 2019-02-27 | 2019-05-21 | 中国科学院理化技术研究所 | A kind of titanic alloy machining processing method |
| CN112139412A (en) * | 2020-08-19 | 2020-12-29 | 江西昌河航空工业有限公司 | Deformation-preventing machining method for multi-dimensional form and position tolerance heat treatment aluminum alloy forge piece |
| CN112372005A (en) * | 2020-04-13 | 2021-02-19 | 广东佳悦美视生物科技有限公司 | Preparation method of collar button type artificial cornea |
| CN113059099A (en) * | 2021-03-17 | 2021-07-02 | 无锡透平叶片有限公司 | Method for improving tensile strength and uniformity of high-temperature alloy and titanium alloy forged piece |
| CN113523729A (en) * | 2021-08-09 | 2021-10-22 | 无锡航亚科技股份有限公司 | Efficient and stable machining process of thin-wall annular part |
-
2014
- 2014-12-12 CN CN201410760135.8A patent/CN104668918A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104972281A (en) * | 2015-07-15 | 2015-10-14 | 江西洪都航空工业集团有限责任公司 | Machining technology of open structure part |
| CN107199445A (en) * | 2016-03-18 | 2017-09-26 | 徐州万达回转支承有限公司 | A kind of processing technology of ultra-thin gear ring |
| CN105945530A (en) * | 2016-06-27 | 2016-09-21 | 盛瑞传动股份有限公司 | Gear chamber cover blank and gear chamber cover machining method |
| CN107538188A (en) * | 2016-06-28 | 2018-01-05 | 高玉琴 | A kind of processing method of wheel blank |
| CN108747243A (en) * | 2018-08-06 | 2018-11-06 | 合肥银泉铸造有限责任公司 | A kind of planetary gear processing technology |
| CN109778092B (en) * | 2019-02-27 | 2020-06-12 | 中国科学院理化技术研究所 | Titanium alloy processing method |
| CN109778092A (en) * | 2019-02-27 | 2019-05-21 | 中国科学院理化技术研究所 | A kind of titanic alloy machining processing method |
| CN112372005A (en) * | 2020-04-13 | 2021-02-19 | 广东佳悦美视生物科技有限公司 | Preparation method of collar button type artificial cornea |
| CN112372005B (en) * | 2020-04-13 | 2023-12-19 | 广东佳悦美视生物科技有限公司 | Preparation method of collar buckle type artificial cornea |
| CN112139412A (en) * | 2020-08-19 | 2020-12-29 | 江西昌河航空工业有限公司 | Deformation-preventing machining method for multi-dimensional form and position tolerance heat treatment aluminum alloy forge piece |
| CN112139412B (en) * | 2020-08-19 | 2023-06-27 | 江西昌河航空工业有限公司 | Anti-deformation processing method for multi-dimensional form and position tolerance heat treatment aluminum alloy forging |
| CN113059099A (en) * | 2021-03-17 | 2021-07-02 | 无锡透平叶片有限公司 | Method for improving tensile strength and uniformity of high-temperature alloy and titanium alloy forged piece |
| CN113523729A (en) * | 2021-08-09 | 2021-10-22 | 无锡航亚科技股份有限公司 | Efficient and stable machining process of thin-wall annular part |
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Application publication date: 20150603 |