CN109290751A - A kind of processing method of countersunk head square neck bolt - Google Patents
A kind of processing method of countersunk head square neck bolt Download PDFInfo
- Publication number
- CN109290751A CN109290751A CN201811389230.6A CN201811389230A CN109290751A CN 109290751 A CN109290751 A CN 109290751A CN 201811389230 A CN201811389230 A CN 201811389230A CN 109290751 A CN109290751 A CN 109290751A
- Authority
- CN
- China
- Prior art keywords
- bolt
- station
- workpiece
- raw material
- ingredient
- 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.)
- Pending
Links
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000000641 cold extrusion Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims description 24
- 239000004615 ingredient Substances 0.000 claims description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- 229910052779 Neodymium Inorganic materials 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 150000001408 amides Chemical class 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 229910052749 magnesium Inorganic materials 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 5
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 claims description 3
- 206010037660 Pyrexia Diseases 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000010583 slow cooling Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 210000003739 neck Anatomy 0.000 description 6
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of processing methods of countersunk head square neck bolt, by to bolt at being grouped as and production and processing method has carried out Improvement, it is processed using cold-extrusion technology bolt, hardness number, intensity value needed for having reached 12.9 grades and 14.9 grade high-strength bolts, solve the delayed fracture and fatigue fracture of bolt under high intensity, connection is reliable in use, it is not easily broken, improve bolt life, bolt strength is higher simultaneously, and toughness is more preferable, and corrosion resistance is stronger, it can adapt to the weather environment of severe complexity, longer life expectancy.
Description
Technical field
The present invention relates to technical field of fastening, more particularly to a kind of countersunk head square neck bolt.
Background technique
Cylindrical threaded fastener of the bolt as a kind of adapted nut of machine components, by head and screw rod two
A kind of fastener being grouped as need to cooperate with nut, for being fastenedly connected two parts for having through-hole.Bolt is widely used in
All trades and professions, but the requirement in different industries to bolt strength, such as in fields such as space flight, petroleum detections, it is strong to bolt
The requirement of degree is higher, but bolt currently on the market is difficult to fully meet the requirement of all trades and professions, moreover, manufacturing high-intensitive spiral shell
The uneasinesses such as the mode of bolt is generally the molding of turning, and intensity is often difficult to ensure, generation is turned around in use sometimes, bar portion is broken
Full phenomenon endangers industrial production very big.Therefore high-strength bolt manufacturing method is studied and is improved, it is ensured that high-intensitive spiral shell
The quality stability of bolt, plays a significant role technology and expanding economy.In addition, bolt is in the environment of relative humidity
When, get rusty easily corrosion, eventually leads to fracture or crackle, forms potential accident source.In consideration of it, it is necessary to provide a kind of high-strength
The processing method of bolt is spent, more corrosion resistant high-strength bolt is produced.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide a kind of processing methods of countersunk head square neck bolt.
In view of the above-mentioned problems, one technical scheme adopted by the invention is that: a kind of processing side of countersunk head square neck bolt is provided
Method includes the following steps:
(1) sampling analysis, accurate to match: the raw material components of the bolt mainly include magnesium: 10-15%, carbon: 20-25%, lithium:
2-5%, silicon: 1-3%, molybdenum 18-26%, nickel: 10-15%, vanadium: 1-2%, manganese: 1-2%, cobalt: 0.5-1%, neodymium: 0.5-1%；Auxiliary is former
The ingredient of material are as follows: polypropylene: 15-25%, amide waxe: 1-3%；The raw material prepared is sampled, is obtained by spectroanalysis instrument
To the element species in sampling ingredient, the density of sampling ingredient is obtained by density tester, the data obtained is carried out through computer
Row analysis is compared, obtains sample each element distributing precision, it is ± 0.05% that each element, which matches accuracy errors,；It is matched according to gained
Increase corresponding auxiliary material, guarantees that the proportion of each tenor of raw material in entire production reaches the requirement of required standard proportion；
(2) it is prepared into the workpiece for manufacturing bolt using ingredient: principal ingredients and auxiliary ingredients being first put into blender
It is stirred, by temperature control at 200 DEG C, revolving speed is controlled at 150 revs/min, and after stirring 1 hour, mixture is passed through double helix
Melting mixing is dispersed in bar extruder, is squeezed into be processed in mold；The raw material in mold is added in frequency induction furnace again and is melted
Refining, refining and casting processing form the workpiece of required shape；
(3) whole diameter: first carrying out acid pickling and rust removing for workpiece, then carry out spheroidizing processing, workpiece through 780 DEG C constant temperature 10 hours
Afterwards, Slow cooling is carried out；It requires to carry out pumping line to workpiece according still further to the line footpath of bolt, line needed for making it be retracted to bolt
Diameter；
(4) cold-heading: the workpiece after cutting is put into mold cavity at normal temperature by length needed for workpiece is cut to bolt
It is interior, head and bar portion size needed for so that workpiece is formed bolt with upset force；
(5) threading: the workpiece is squeezed by dental lamina, forms screwed bolt；
(6) it is heat-treated: the bolt that threading is formed being quenched at 1200 DEG C with quenching oil, then quenched bolt is existed
It is tempered at 500 DEG C, the duration 120 minutes；
(7) be surface-treated: the bolt after will be tempered is placed in fever type gas and becomes in furnace, is generated using gas and air burning
Oxidizing gas carries out blackening process to bolt to get finished product bolt.
Preferably, the ingredient of the bolt mainly includes magnesium: 12.5%, carbon: and 22%, lithium: 3%, silicon: 2%, molybdenum 23%, nickel:
12%, vanadium: 1%, manganese: 1%, cobalt: 0.5%, neodymium: 1%；The ingredient of auxiliary material are as follows: polypropylene: 20 %, amide waxe: 2%.
Preferably, step (4) cold-heading is produced using multi-station machine, and step includes:
(1) first station is cold extrusion shaped: the raw material after cutting at normal temperature, by fixture be transmitted to the first station male model and
Between master mold, and feed pressure is given by male model, send to master mold and form bar portion for the first time, male model forms head for the first time；
(2) second station is cold extrusion shaped: the first station first time molding raw material is transmitted to the public affairs of second station by fixture
Between mould and master mold, and feed pressure to be given by male model, send to master mold and form bar portion for the second time, male model forms head for the second time,
Form the blank of finished product bolt head；
(3) 3rd station is cold extrusion shaped: second of molding raw material of second station is transmitted to 3rd station by fixture, described
Raw material forms head in 3rd station, while forming bar portion and undergauge goes out threading effective diameter.
The beneficial effects of the present invention are: by bolt at being grouped as and production and processing method has carried out Improvement,
It is processed using cold-extrusion technology bolt, hardness number, intensity value needed for having reached 12.9 grades and 14.9 grade high-strength bolts, solution
It has determined the delayed fracture and fatigue fracture of high-intensitive lower bolt, connection is reliable in use, is not easily broken, improves the bolt longevity
Life, while bolt strength is higher, toughness is more preferable, and corrosion resistance is stronger, can adapt to the weather environment of severe complexity, the service life is more
It is long.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
A kind of processing method of countersunk head square neck bolt, includes the following steps:
(1) sampling analysis, accurate to match: the raw material components of the bolt mainly include magnesium: 12.5%, carbon: and 22%, lithium: 3%,
Silicon: 2%, molybdenum 23%, nickel: 12%, vanadium: 1%, manganese: 1%, cobalt: 0.5%, neodymium: 1%；The ingredient of auxiliary material are as follows: polypropylene: 20 %,
Amide waxe: 2%；The raw material prepared is sampled, the element species in sampling ingredient are obtained by spectroanalysis instrument, are passed through
Density tester obtains the density of sampling ingredient, and capable analysis is compared through computer in the data obtained, sample each element is obtained and matches
Than precision, it is ± 0.05% that each element, which matches accuracy errors,；Increase corresponding auxiliary material according to gained proportion, guarantees entire production
The proportion of middle each tenor of raw material reaches the requirement of required standard proportion；
(2) it is prepared into the workpiece for manufacturing bolt using ingredient: principal ingredients and auxiliary ingredients being first put into blender
It is stirred, by temperature control at 200 DEG C, revolving speed is controlled at 150 revs/min, and after stirring 1 hour, mixture is passed through double helix
Melting mixing is dispersed in bar extruder, is squeezed into be processed in mold；The raw material in mold is added in frequency induction furnace again and is melted
Refining, refining and casting processing form the workpiece of required shape；
(3) whole diameter: first carrying out acid pickling and rust removing for workpiece, then carry out spheroidizing processing, workpiece through 780 DEG C constant temperature 10 hours
Afterwards, Slow cooling is carried out；It requires to carry out pumping line to workpiece according still further to the line footpath of bolt, line needed for making it be retracted to bolt
Diameter；
(4) cold-heading: cold-heading is carried out to the workpiece in step (3) using multi-station machine, step includes:
1) the first station is cold extrusion shaped: the raw material after cutting at normal temperature, by fixture be transmitted to the first station male model and
Between master mold, and feed pressure is given by male model, send to master mold and form bar portion for the first time, male model forms head for the first time；
2) second station is cold extrusion shaped: the first station first time molding raw material is transmitted to the male model of second station by fixture
Feed pressure is given between master mold, and by male model, send to master mold and forms bar portion for the second time, male model forms head, shape for the second time
At the blank of finished product bolt head；
3) 3rd station is cold extrusion shaped: second of molding raw material of second station is transmitted to 3rd station by fixture, described
Raw material forms head in 3rd station, while forming bar portion and undergauge goes out threading effective diameter；
(5) threading: the workpiece is squeezed by dental lamina, forms screwed bolt；
(6) it is heat-treated: the bolt that threading is formed being quenched at 1200 DEG C with quenching oil, then quenched bolt is existed
It is tempered at 500 DEG C, the duration 120 minutes；
(7) be surface-treated: the bolt after will be tempered is placed in fever type gas and becomes in furnace, is generated using gas and air burning
Oxidizing gas carries out blackening process to bolt to get finished product bolt.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and content is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (3)
1. a kind of processing method of countersunk head square neck bolt, which comprises the steps of:
(1) sampling analysis, accurate to match: the raw material components of the bolt mainly include magnesium: 10-15%, carbon: 20-25%, lithium:
2-5%, silicon: 1-3%, molybdenum 18-26%, nickel: 10-15%, vanadium: 1-2%, manganese: 1-2%, cobalt: 0.5-1%, neodymium: 0.5-1%；Auxiliary is former
The ingredient of material are as follows: polypropylene: 15-25%, amide waxe: 1-3%；The raw material prepared is sampled, is obtained by spectroanalysis instrument
To the element species in sampling ingredient, the density of sampling ingredient is obtained by density tester, the data obtained is carried out through computer
Row analysis is compared, obtains sample each element distributing precision, it is ± 0.05% that each element, which matches accuracy errors,；It is matched according to gained
Increase corresponding auxiliary material, guarantees that the proportion of each tenor of raw material in entire production reaches the requirement of required standard proportion；
(2) it is prepared into the workpiece for manufacturing bolt using ingredient: principal ingredients and auxiliary ingredients being first put into blender
It is stirred, by temperature control at 200 DEG C, revolving speed is controlled at 150 revs/min, and after stirring 1 hour, mixture is passed through double helix
Melting mixing is dispersed in bar extruder, is squeezed into be processed in mold；The raw material in mold is added in frequency induction furnace again and is melted
Refining, refining and casting processing form the workpiece of required shape；
(3) whole diameter: first carrying out acid pickling and rust removing for workpiece, then carry out spheroidizing processing, workpiece through 780 DEG C constant temperature 10 hours
Afterwards, Slow cooling is carried out；It requires to carry out pumping line to workpiece according still further to the line footpath of bolt, line needed for making it be retracted to bolt
Diameter；
(4) cold-heading: the workpiece after cutting is put into mold cavity at normal temperature by length needed for workpiece is cut to bolt
It is interior, head and bar portion size needed for so that workpiece is formed bolt with upset force；
(5) threading: the workpiece is squeezed by dental lamina, forms screwed bolt；
(6) it is heat-treated: the bolt that threading is formed being quenched at 1200 DEG C with quenching oil, then quenched bolt is existed
It is tempered at 500 DEG C, the duration 120 minutes；
(7) be surface-treated: the bolt after will be tempered is placed in fever type gas and becomes in furnace, is generated using gas and air burning
Oxidizing gas carries out blackening process to bolt to get finished product bolt.
2. a kind of processing method of countersunk head square neck bolt according to claim 1, which is characterized in that the ingredient of the bolt
Mainly include magnesium: 12.5%, carbon: 22%, lithium: 3%, silicon: 2%, molybdenum 23%, nickel: 12%, vanadium: 1%, manganese: 1%, cobalt: 0.5%, neodymium: 1%
；The ingredient of auxiliary material are as follows: polypropylene: 20 %, amide waxe: 2%.
3. a kind of processing method of countersunk head square neck bolt according to claim 1, which is characterized in that the step (4) is cold
Upsetting is produced using multi-station machine, and step includes:
(1) first station is cold extrusion shaped: the raw material after cutting at normal temperature, by fixture be transmitted to the first station male model and
Between master mold, and feed pressure is given by male model, send to master mold and form bar portion for the first time, male model forms head for the first time；
(2) second station is cold extrusion shaped: the first station first time molding raw material is transmitted to the public affairs of second station by fixture
Between mould and master mold, and feed pressure to be given by male model, send to master mold and form bar portion for the second time, male model forms head for the second time,
Form the blank of finished product bolt head；
(3) 3rd station is cold extrusion shaped: second of molding raw material of second station is transmitted to 3rd station by fixture, described
Raw material forms head in 3rd station, while forming bar portion and undergauge goes out threading effective diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389230.6A CN109290751A (en) | 2018-11-21 | 2018-11-21 | A kind of processing method of countersunk head square neck bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811389230.6A CN109290751A (en) | 2018-11-21 | 2018-11-21 | A kind of processing method of countersunk head square neck bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109290751A true CN109290751A (en) | 2019-02-01 |
Family
ID=65144623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811389230.6A Pending CN109290751A (en) | 2018-11-21 | 2018-11-21 | A kind of processing method of countersunk head square neck bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109290751A (en) |
-
2018
- 2018-11-21 CN CN201811389230.6A patent/CN109290751A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101890618B (en) | Processing method of high-strength bolts | |
| CN106282726A (en) | A kind of high-strength anti-corrosion bolt and manufacture method thereof | |
| CN104480477B (en) | A kind of anti-corrosion and high strength hex bolts production technology | |
| CN103128506B (en) | The anti-preparation method of foot bolt yieldly | |
| JP4429775B2 (en) | Clinch nut manufacturing method and clinch nut manufactured by this manufacturing method | |
| CN103088268B (en) | The preparation method of fastening bolt used for automobile wheels | |
| US20090286608A1 (en) | Method of forming a high performance thread forming screw | |
| CN104139141A (en) | Equiaxed grain forging forming method for titanium alloy ring piece | |
| CN102172815A (en) | Hot extrusion forming method for inner hexagonal bolt blank of titanium alloy | |
| CN109290751A (en) | A kind of processing method of countersunk head square neck bolt | |
| CN105525223A (en) | Production process for super-plastic steel and iron material for large-diameter hexagon bolt | |
| CN109622840A (en) | A kind of complicated 7075 aluminum alloy casing isothermy die forging methods of the more muscle classes of large size | |
| CN108998709A (en) | A kind of preparation method of aluminium alloy | |
| CN103028685A (en) | Processing method for high-class bolt | |
| CN103088267B (en) | The preparation method of Lengthened bolt | |
| CN105478502A (en) | Production process of non-annealed wire material for pulling rivet pull rod | |
| CN205949664U (en) | Hexagonal screw's stamping die | |
| US2565665A (en) | Screw and method of making same | |
| CN107447221A (en) | The heat treatment method of connecting-rod bolts | |
| CN109352281A (en) | A kind of forming method of 12 corner bolt of countersunk head | |
| CN203380207U (en) | Rare-earth magnesium alloy pressing die | |
| CN112935732A (en) | Preparation method of nickel-based alloy bolt | |
| CN112719791A (en) | Method for manufacturing titanium and titanium alloy flange | |
| CN114480950A (en) | Preparation process of high-temperature-resistant high-strength special fastener | |
| CN212429464U (en) | Straight-groove stud bolt for wind power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190201 |