CN110421318A - A kind of aero titanium alloy high locked bolts processing technology - Google Patents
A kind of aero titanium alloy high locked bolts processing technology Download PDFInfo
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- CN110421318A CN110421318A CN201910670321.5A CN201910670321A CN110421318A CN 110421318 A CN110421318 A CN 110421318A CN 201910670321 A CN201910670321 A CN 201910670321A CN 110421318 A CN110421318 A CN 110421318A
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- upsetting
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- bolt
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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
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Abstract
The present invention discloses a kind of aero titanium alloy high locked bolts processing technology, and compared with conventional preparation techniques, not only quality is high and processes yields height for the titanium alloy high locked bolts that through the invention prepared by the step of offer, can significantly reduce cost.And process flow is simple, can be realized on conventional equipment, can reduce equipment investment and energy consumption；Design can be required according to final products and is processed raw material, and there is cost advantage.Secondly, the mechanical property of high locked bolts can be greatly improved using above-mentioned preparation process.
Description
Technical field
The present invention relates to aviation bolt technology manufacturing fields, and in particular to a kind of aero titanium alloy high locked bolts processing work
Skill.
Background technique
With the continuous development of aeronautical and space technology, aerospace vehicle, missile armament flying speed are getting faster,
The operating thermal environment of power device is increasingly severe, thus proposes increasingly higher demands to aerospace, missile armament.Titanium
Alloy has many advantages, such as density, intensity high, antifatigue good, excellent corrosion resistance, nonmagnetic, is suitable as bolt material.It answers
The weight loss effect generated with titanium alloy bolt, to propulsive force, the increase stroke, saving fuel, reduction for improving aircraft and spacecraft
Launching costs etc. are all significant.Titanium alloy high locked bolts are a kind of standards for being widely used in aviation field and being fastenedly connected
Part is higher to the quality requirements of high locked bolts due to the high reliability request of its connection.
Existing titanium alloy high locked bolts processing method is jumping-up and the processing technology that machining mode combines, and is added
Working medium amount and processing efficiency are lower, and process is tedious in process, and qualification rate is low, and processing cost is higher.
Summary of the invention
For the defects in the prior art, it is an object of the invention to a kind of aero titanium alloy height for proposing to provide to lock spiral shell
Bolt processing technology, to solve the high institute bolt preparation process of existing titanium alloy, process is tedious, of poor quality, low efficiency, at high cost etc. lacks
Point.Its specific technical solution is as follows:
A kind of aero titanium alloy high locked bolts processing technology, including following making step:
S1. blank prepares: by titanium alloy bolt raw material, cogging is forged on forging machine, and forging temperature is 600-700 DEG C；
S2. type is made in upsetting: multiple upsetting forms upsetting bar after type is made, then upsetting bar is truncated into shank of bolt material institute
The length needed, wherein upsetting temperature is 600-700 DEG C；
S3. oil removing cleaning cleaning before heat treatment: is carried out to upsetting bar using cleaning equipment；
S4. for the first time be heat-treated: by upsetting bar be placed in vacuum water quenching oven 850-900 DEG C at a temperature of be dissolved
Isothermal holding；
S5. it is heat-treated for second: the upsetting bar after solution treatment being placed in progress ageing treatment in vacuum aging furnace and is obtained
To first-stage semi-finished product, wherein aging temperature is 500-600 DEG C；
S6. mechanical process: the second level semi-finished product of form-factor needed for first-stage semi-finished product is gone out using numerical control lathe wheeled litter；
S7. bar diameter milled processed: the grinding of bar diameter is carried out to second level semi-finished product using centreless grinding equipment, wherein grinding is set
Standby grinding revolving speed 800-1200r/min.
S7. make the angle R: the second level semi-finished product by milled processed carry out rolling R to abrasive product using rolling R machine and strengthen R
Angle；
S8. screw thread process: being heated to 200 DEG C~400 DEG C for shank of bolt material using induction heating mode before screw thread process,
By thread rolling machining screw thread in 5s after stopping heating, prefabricated bolt is obtained；
S9. punching processing: six sides of punching are done to bolt using punching apparatus or 12 corner apertures handle to obtain finished product bolt；
S10. carrying out flaw detection carrying out flaw detection: is carried out to finished product bolt using DNT defectoscope；
S11. it is surface-treated: finished product bolt being cleaned, spray, is dried.
This process program is compared with conventional preparation techniques, the titanium alloy high locked bolts prepared through the above steps not only matter
Amount is high and processes yields height, can significantly reduce cost.Qualification prepares raw material and blank is made by forging after screening,
In subsequent upsetting technique, by the continuous upsetting system of upsetting machine and utilize the mold of dimension by the head of high locked bolts, bar diameter
The angle R one-pass molding under different step bars diameter, head angle and head, it is ensured that the continuity of the internal grain tissue of blank guarantees
The performance of product.Followed by cleaning, the product after upsetting system is put into corresponding cleaning line and pickling line removes product
The dirts such as the oxide skin generated due to upsetting system.In solid solution and timeliness twice in heat treatment process, need in vacuum solid solution furnace and true
It is heat-treated in empty water quenching oven, can guarantee that after heat treatment performance is met the requirements product；The stress in blank is eliminated, is had
Effect reduces influence of the stress to green strength and fatigue behaviour；Product after heat treatment can be put into numerically controlled lathe, processing head
Portion, bar portion, the polished rod of high locked bolts and the excessive angle of spiral shell base bar and product total length, and tail portion do interior outer chamfer and
Tail portion bottoming hole one-pass molding.In grinding steps, product is put into centerless grinding machine, the big small pole diameter of abrasive product, head height and
The lower angle R of head, guarantees the smoothness requirements of product.In the rolling angle R step, product is put into rolling R machine and carries out fillet reinforcing, with
Guarantee the requirement of the fatigue behaviour of product.In screw thread process, product is put into thread rolling machine and carries out heating thread rolling, guarantees to produce
The screw thread requirement of product, and can efficiently, the completion product screw thread of high quality must process.It can be rushed after the completion of screw thread process
Six sides or the molding of 12 corner apertures.Carrying out flaw detection finally is carried out to product, can guarantee the quality requirement of product.
Preferred technical solution, additional technical feature are, in S2, upsetting be made type number be twice, and it is primary
Hot upsetting temperature is 600-700 DEG C, and second heat upsetting temperature is 650-700 DEG C, and in S2, it is twice and one that type number, which is made, in upsetting
Secondary hot upsetting temperature is 600-700 DEG C, and second heat upsetting temperature is 650-700 DEG C, in first time upsetting system by the head dummy of high locked bolts,
Type is made in the different upsetting of step bars diameter of angle, the angle R, bar diameter.
Preferred technical solution, additional technical feature are, in S3, oil removing cleaning, which uses, acidic cleaner.
Preferred technical solution, additional technical feature are, in S4, when solution treatment a length of 100-150min.
Preferred technical solution, additional technical feature are, in S5, when ageing treatment a length of 7.5-8.5h.
Preferred technical solution, additional technical feature are, in S5, the vacuum degree of vacuum aging furnace is true≤
0.02Pa。
Preferred technical solution, additional technical feature are, in S6, first-stage semi-finished product is sharp before mechanical process
Cleaning treatment is done with cleaning equipment.
The beneficial effects of the present invention are: aero titanium alloy high locked bolts processing technology provided by the invention and the prior art
It compares, present invention has the advantage that not only quality is high and processes yields height, cost can be significantly reduced.And technique stream
Journey is simple, can be realized on conventional equipment, can reduce equipment investment and energy consumption；Design can be required according to final products and is added
Work raw material has cost advantage.Secondly, the mechanical property of high locked bolts can be greatly improved using above-mentioned preparation process.
Detailed description of the invention
It, below will be to tool in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Body embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar member
Part or part are generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio
System.
Fig. 1 is the preparation flow schematic diagram for the aero titanium alloy high locked bolts processing technology that an embodiment provides.
Specific embodiment
Here, it is to be noted that, function of the present invention, method etc. are only that the conventional adaptation of the prior art is answered
With.Therefore, improvement of the present invention for the prior art, the connection relationship being substantially between hardware, rather than it is directed to function, side
Method itself, although namely the present invention be related to some functions, method, and do not include the improvement proposed to function, method itself.
Description of the present invention for function, method is in order to better illustrate the present invention, to better understand the present invention.
Embodiment one
In example 1, the present invention provides a kind of aero titanium alloy high locked bolts processing technology and conventional preparation techniques
It compares, not only quality is high and processes non-defective unit for the obtained titanium alloy high locked bolts of the preparation step provided through this embodiment
Rate is high, can significantly reduce cost.Specifically include following making step:
Step 1. blank prepares: by titanium alloy bolt raw material, cogging is forged on forging machine, and forging temperature is 600 DEG C；Through
It crosses qualification after screening and prepares raw material and blank is made by forging, the mechanics of forging blank can be ensured under 600 DEG C of forging conditions
Performance.
Type is made in step 2. upsetting: multiple upsetting forms upsetting bar after type is made, then upsetting bar is truncated into shank of bolt material
Required length, wherein upsetting temperature is 600 DEG C；In this step, it is and primary hot upsetting temperature twice that type number, which is made, in upsetting
Degree is 600 DEG C, and second heat upsetting temperature is 650 DEG C；In first time upsetting technique, by the continuous upsetting system of upsetting machine and using accordingly
The mold of specification is by the angle R one-pass molding under the head of high locked bolts, the step bars diameter of different-diameter, head angle and head, it is ensured that
The continuity of the internal grain tissue of blank, guarantees the performance of product.
Step 3. is heat-treated preceding cleaning: carrying out oil removing cleaning to upsetting bar using cleaning equipment；Oil removing cleaning, which uses, to be had
Acidic cleaner.Product after upsetting system is put into corresponding cleaning equipment can go under organic oil removing solvent action
The dirts such as the oxide skin generated except product due to upsetting system.
Step 4. is heat-treated for the first time: by upsetting bar be placed in vacuum water quenching oven 850 degree at a temperature of carry out solid solution guarantor
Temperature processing；In S4, when solution treatment a length of 125min.
Second of step 5. heat treatment: the upsetting bar after solution treatment is placed in vacuum aging furnace and is carried out at timeliness
Reason obtains first-stage semi-finished product, and wherein aging temperature is 550 DEG C；In S5, the vacuum degree of vacuum aging furnace is true≤
0.02Pa.In this step, a length of 8h when ageing treatment.In solid solution and timeliness twice heat treatment process, need solid in vacuum
It is heat-treated in molten furnace and vacuum water quenching oven, can guarantee that after heat treatment performance is met the requirements product；It eliminates in blank
Influence of the stress to green strength and fatigue behaviour is effectively reduced in stress.
Step 6. mechanical process: the second level half of form-factor needed for first-stage semi-finished product is gone out using numerical control lathe wheeled litter at
Product；In this step, first-stage semi-finished product does cleaning treatment using cleaning equipment before mechanical process.In this way, after over cleaning
Be put into numerically controlled lathe, processing head, the polished rod of high locked bolts and the excessive angle in junction of spiral shell base, product total length, tail
Outer chamfer and tail portion bottoming hole one-pass molding in portion.
Step 7. bar diameter milled processed: the grinding of bar diameter, including head dummy are carried out to second level semi-finished product using centreless grinding equipment
The angle R, step bars diameter etc. are once worn by milling apparatus under angle, head, wherein the grinding revolving speed 800-1200r/ of milling apparatus
min.Milling apparatus can the angle R under the big small pole diameter of abrasive product and head height and head, guarantee the smoothness requirements of product.
Step 8. makes the angle R: second level semi-finished product by milled processed carry out rolling R and strong to abrasive product using rolling R machine
Change the angle R；To guarantee the requirement of the fatigue behaviour of product.
Step 9. screw thread process: shank of bolt material is heated to 300 DEG C using induction heating mode before screw thread process, is stopped
By thread rolling machining screw thread in 5s after heating, prefabricated bolt is obtained；In screw thread process, product is put into thread rolling machine
In carry out heating thread rolling, guarantee the screw thread requirement of product, and can efficiently, the completion product screw thread of high quality must process.Usually
Traditional process is using the process for forcing cold rolling.Often there is Bottom of Thread circle in the thread-forming methods
The defects of arc R is folded, tooth side cracking, cusp notch causes product screw strength to be unable to satisfy mechanical test requirement.This
The processing step that embodiment provides can be good at guaranteeing the requirement and performance of product yield.
Step 10. punching processing: six sides of punching are done to bolt using punching apparatus or 12 corner apertures handle to obtain finished product spiral shell
Bolt；
Step 11. carrying out flaw detection: carrying out flaw detection is carried out to finished product bolt using DNT defectoscope；Flaw detection inspection is carried out to product
It surveys, can guarantee the quality requirement of product.
Step 12. surface treatment: finished product bolt is cleaned, sprayed, is dried.High lock spiral shell after drying and processing
Bolt finished product also needs to do surfacecti proteon processing, the present embodiment using in such a way that high locked bolts finished surface coats lubricating oil into
Row protection, can finally pack factory.
Embodiment two
As shown in Figure 1, in one embodiment, the present invention provides a kind of aero titanium alloy high locked bolts processing technology and passes
System preparation process compares, and not only quality height is simultaneously for the obtained titanium alloy high locked bolts of the preparation step provided through this embodiment
And processing yields is high, can significantly reduce cost.Specifically include following making step:
Step 1. blank prepares: by titanium alloy bolt raw material, cogging is forged on forging machine, and forging temperature is 650 DEG C；Through
It crosses qualification after screening and prepares raw material and blank is made by forging, the mechanics of forging blank can be ensured under 650 DEG C of forging conditions
Performance.
Type is made in step 2. upsetting: multiple upsetting forms upsetting bar after type is made, then upsetting bar is truncated into shank of bolt material
Required length；In this step, it is that twice, and primary hot upsetting temperature is preferably 650 DEG C, second heat upsetting that type number, which is made, in upsetting
Temperature is 700 DEG C；In upsetting technique, by the continuous upsetting system of upsetting machine and utilize the mold of dimension by the head of high locked bolts
The angle R one-pass molding under the different step bars of portion, bar diameter, head angle and head, it is ensured that the internal grain tissue of blank it is continuous
Property, guarantee the performance of product.
Step 3. is heat-treated preceding cleaning: carrying out oil removing cleaning to upsetting bar using cleaning equipment；Oil removing cleaning, which uses, to be had
Acidic cleaner.Product after upsetting system is put into corresponding cleaning equipment can go under organic oil removing solvent action
The dirts such as the oxide skin generated except product due to upsetting system.
Step 4. is heat-treated for the first time: by upsetting bar be placed in vacuum water quenching oven 900 DEG C at a temperature of carry out solid solution guarantor
Temperature processing；In step 4, a length of 150min when solution treatment.
Second of step 5. heat treatment: the upsetting bar after solution treatment is placed in vacuum aging furnace and is carried out at timeliness
Reason obtains first-stage semi-finished product, and wherein aging temperature is 600 DEG C；In S5, the vacuum degree of vacuum aging furnace is true≤
0.02Pa.In this step, a length of 8.5h when ageing treatment.In solid solution and timeliness twice heat treatment process, need in vacuum
It is heat-treated in solid solution furnace and vacuum water quenching oven, can guarantee that after heat treatment performance is met the requirements product；It eliminates in blank
Stress, influence of the stress to green strength and fatigue behaviour is effectively reduced.
Step 6. mechanical process: the second level half of form-factor needed for first-stage semi-finished product is gone out using numerical control lathe wheeled litter at
Product；In S6, first-stage semi-finished product does cleaning treatment using cleaning equipment before mechanical process.In this way, after over cleaning can
Be put into numerically controlled lathe, processing head, the excessive angle of the polished rod of high locked bolts and spiral shell base bar junction, product total length, in tail portion
Outer chamfer and tail portion bottoming hole one-pass molding.
Step 7. bar diameter milled processed: the grinding of bar diameter, including head dummy are carried out to second level semi-finished product using centreless grinding equipment
The angle R, big small pole diameter etc. are once worn by milling apparatus under angle, head, wherein the grinding revolving speed 800-1200r/ of milling apparatus
min.Milling apparatus can the angle R under the big small pole diameter of abrasive product and head height and head, guarantee the smoothness requirements of product.
Step 8. makes the angle R: second level semi-finished product by milled processed carry out rolling R and strong to abrasive product using rolling R machine
Change the angle R；To guarantee the requirement of the fatigue behaviour of product.
Step 9. screw thread process: shank of bolt material is heated to 400 DEG C using induction heating mode before screw thread process, is stopped
By thread rolling machining screw thread in 5s after heating, prefabricated bolt is obtained；In screw thread process, product is put into thread rolling machine
In carry out heating thread rolling, guarantee the screw thread requirement of product, and can efficiently, the completion product screw thread of high quality must process.Usually
Traditional process is using the process for forcing cold rolling.Often there is Bottom of Thread circle in the thread-forming methods
The defects of arc R is folded, tooth side cracking, cusp notch causes product screw strength to be unable to satisfy mechanical test requirement.This
The processing step that embodiment provides can be good at guaranteeing the requirement and performance of product yield.
Step 10. punching processing: six sides of punching are done to bolt using punching apparatus or 12 corner apertures handle to obtain finished product spiral shell
Bolt；
Step 11. carrying out flaw detection: carrying out flaw detection is carried out to finished product bolt using DNT defectoscope；Flaw detection inspection is carried out to product
It surveys, can guarantee the quality requirement of product.
Step 12. surface treatment: finished product bolt is cleaned, sprayed, is dried.High lock spiral shell after drying and processing
Bolt finished product also needs to do surfacecti proteon processing, the present embodiment using in such a way that high locked bolts finished surface coats lubricating oil into
Row protection, can finally pack factory.
In specification of the invention, numerous specific details are set forth.It is to be appreciated, however, that the embodiment of the present invention can
To practice without these specific details.In some instances, be not been shown in detail well known method, system and
Technology, so as not to obscure the understanding of this specification.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；
Although present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its
It still can be to modify the technical solutions described in the foregoing embodiments, or to some or all of technologies
Feature is equivalently replaced；And these are modified or replaceed, the present invention that it does not separate the essence of the corresponding technical solution is each to be implemented
The range of example technical solution, should all cover within the scope of the claims and the description of the invention.
Claims (7)
1. a kind of aero titanium alloy high locked bolts processing technology, it is characterised in that: including following making step:
S1. blank prepares: by titanium alloy bolt raw material, cogging is forged on forging machine, and forging temperature is 600-700 DEG C；
S2. type is made in upsetting: multiple upsetting forms upsetting bar after type is made, then length needed for upsetting bar is truncated into shank of bolt material
Degree, wherein upsetting temperature is 600-700 DEG C；
S3. oil removing cleaning cleaning before heat treatment: is carried out to upsetting bar using cleaning equipment；
S4. for the first time be heat-treated: by upsetting bar be placed in vacuum water quenching oven 850-900 DEG C at a temperature of carry out solid solution heat preservation at
Reason；
S5. it is heat-treated for second: the upsetting bar after solution treatment being placed in progress ageing treatment in vacuum aging furnace and obtains one
Grade semi-finished product, wherein aging temperature is 500-600 DEG C；
S6. mechanical process: the second level semi-finished product of form-factor needed for first-stage semi-finished product is gone out using numerical control lathe wheeled litter；
S7. bar diameter milled processed: carrying out the grinding of bar diameter to second level semi-finished product using centreless grinding equipment, and wherein milling apparatus is ground
Grind revolving speed 800-1200r/min；
S7. make the angle R: the second level semi-finished product by milled processed carry out rolling R to abrasive product using rolling R machine and strengthen the angle R；
S8. screw thread process: being heated to 200 DEG C~400 DEG C for shank of bolt material using induction heating mode before screw thread process, stop plus
By thread rolling machining screw thread in 5s after heat, prefabricated bolt is obtained；
S9. punching processing: six sides of punching are done to bolt using punching apparatus or 12 corner apertures handle to obtain finished product bolt；
S10. carrying out flaw detection carrying out flaw detection: is carried out to finished product bolt using DNT defectoscope；
S11. it is surface-treated: finished product bolt being cleaned, spray, is dried.
2. aero titanium alloy high locked bolts processing technology according to claim 1, it is characterised in that:
In S2, it is that twice, and primary hot upsetting temperature is 600-700 DEG C that type number, which is made, in upsetting, and second heat upsetting temperature is 650-
700 DEG C, type is made in the different upsetting of step bars diameter of the head dummy of high locked bolts, angle, the angle R, bar diameter in first time upsetting system.
3. aero titanium alloy high locked bolts processing technology according to claim 1, it is characterised in that:
In S3, oil removing cleaning raw material, which uses, acidic cleaner.
4. aero titanium alloy high locked bolts processing technology according to claim 1, it is characterised in that:
In S4, when solution treatment a length of 100-150min.
5. aero titanium alloy high locked bolts processing technology according to claim 1, it is characterised in that:
In S5, when ageing treatment a length of 7.5-8.5h.
6. aero titanium alloy high locked bolts processing technology according to claim 1, it is characterised in that:
In S5, the vacuum degree of vacuum aging furnace is true≤0.02Pa.
7. aero titanium alloy high locked bolts processing technology according to claim 1, it is characterised in that:
In S6, first-stage semi-finished product does cleaning treatment using cleaning equipment before mechanical process.
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| CN201910670321.5A CN110421318A (en) | 2019-07-24 | 2019-07-24 | A kind of aero titanium alloy high locked bolts processing technology |
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| CN201910670321.5A CN110421318A (en) | 2019-07-24 | 2019-07-24 | A kind of aero titanium alloy high locked bolts processing technology |
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| CN110814664A (en) * | 2019-11-25 | 2020-02-21 | 浙江中通汽车零部件有限公司 | Manufacturing method of warm forging and thread zero-defect bolt |
| CN111250941A (en) * | 2020-02-19 | 2020-06-09 | 惠州市金思维科技有限公司 | Processing technology of anti-collision screw rod |
| CN111571143A (en) * | 2020-05-26 | 2020-08-25 | 王丽 | Self-plugging rivet manufacturing process |
| CN111570694A (en) * | 2020-05-21 | 2020-08-25 | 湘潭方舟机械有限公司 | Screw production process with good corrosion resistance |
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| CN111250941A (en) * | 2020-02-19 | 2020-06-09 | 惠州市金思维科技有限公司 | Processing technology of anti-collision screw rod |
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| CN112496249A (en) * | 2020-11-11 | 2021-03-16 | 嘉兴联控汽车部件有限公司 | Processing technology of high-temperature-resistant anti-loosening bolt |
| CN112518254A (en) * | 2020-11-30 | 2021-03-19 | 中国航空工业标准件制造有限责任公司 | Machining method of high-precision bolt |
| CN114453841A (en) * | 2022-02-14 | 2022-05-10 | 中国科学院金属研究所 | Preparation method and application of heat-resistant titanium alloy bolt for aerospace |
| CN114654168A (en) * | 2022-03-02 | 2022-06-24 | 江苏东睿航天科技有限公司 | Processing technology of high-lock nut for aerospace |
| WO2024016482A1 (en) * | 2022-07-22 | 2024-01-25 | 七丰精工科技股份有限公司 | Ultrahigh-strength alloy steel, 19.8-grade threaded fastener and preparation method therefor |
| CN115401426A (en) * | 2022-10-08 | 2022-11-29 | 东方蓝天钛金科技有限公司 | Machining process of gear groove countersunk head bolt made of nickel-based superalloy material |
| CN116833690A (en) * | 2023-09-01 | 2023-10-03 | 北京航为高科连接技术有限公司 | Machining method of aviation heat-resistant bolt and bolt |
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