CN116379055A - High-strength antirust nut and manufacturing process thereof - Google Patents
High-strength antirust nut and manufacturing process thereof Download PDFInfo
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- CN116379055A CN116379055A CN202310379044.9A CN202310379044A CN116379055A CN 116379055 A CN116379055 A CN 116379055A CN 202310379044 A CN202310379044 A CN 202310379044A CN 116379055 A CN116379055 A CN 116379055A
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 230000001050 lubricating effect Effects 0.000 claims abstract description 23
- 238000005461 lubrication Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000010687 lubricating oil Substances 0.000 claims abstract description 4
- 239000011265 semifinished product Substances 0.000 claims description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005242 forging Methods 0.000 claims description 8
- 238000010791 quenching Methods 0.000 claims description 7
- 230000000171 quenching effect Effects 0.000 claims description 7
- 238000005496 tempering Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000005488 sandblasting Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims 2
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract description 2
- 238000005422 blasting Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
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- 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
- F16B33/00—Features common to bolt and nut
- F16B33/008—Corrosion preventing means
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- 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
- F16B37/00—Nuts or like thread-engaging members
-
- 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
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/002—Measures against loss of bolts, nuts or pins
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Lubricants (AREA)
- Forging (AREA)
Abstract
The invention discloses a high-strength antirust nut, which comprises a body and a lubrication sleeve, wherein a thread section is arranged on the inner side of the middle part of the body, movable grooves are formed in two sides of the thread section, one end of each movable groove close to the thread section is small in diameter, the other end of each movable groove is large in diameter, the height of the lubrication sleeve is smaller than that of each movable groove and is arranged in each movable groove, steel ingots are heated and then repeatedly forged, heat treatment is carried out after machining, shot blasting treatment is carried out, finally, an antirust coating is sprayed, lubricating oil is coated, and the lubrication sleeve is pressed in, so that the nut can have a lubricating effect when being connected with a bolt, the lubrication sleeve can keep the sealing of the inner thread section of the nut when being abutted against the bolt, thereby avoiding oxidization to achieve the antirust effect, and meanwhile, when the bolt exits the nut, part of rust on the surface of the bolt can be removed under the action of friction force, so that the nut is prevented from being blocked.
Description
Technical Field
The invention discloses a high-strength antirust nut and a manufacturing process thereof, and belongs to the technical field of fastener production and processing.
Background
The nut is the fastener commonly used in the machinery industry, and the current processing mode is the shaping of turning generally, and intensity often is difficult to guarantee, sometimes produces unsafe phenomena such as fracture in use, and is very big to industrial production harm, and when nut and bolted connection simultaneously, because both receive the influence of service environment, nut or bolt rust easily, leads to the bolt and nut to receive great hindrance when dismantling even unable dismantlement and can only destroy the condition of spare part, and at present bolt and nut has not had fine solution to this problem in design and manufacturing.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a high-strength antirust nut and a manufacturing process thereof.
The high-strength antirust nut comprises a body and a lubricating sleeve, wherein a thread section is arranged on the inner side of the middle of the body, movable grooves are formed in two sides of the thread section, one end of each movable groove close to the thread section is small in diameter, the other end of each movable groove is large in diameter, the height of the lubricating sleeve is smaller than that of each movable groove, the lubricating sleeve is arranged in each movable groove, a through hole is formed in the inner side of the lubricating sleeve, a round table surface matched with each movable groove is arranged on the outer side of the lubricating sleeve, the lubricating sleeve comprises a connecting portion and deformation portions, a plurality of deformation portions are arranged, through grooves are formed between two adjacent deformation portions, the deformation portions are arranged away from the thread section during installation, and annular bosses used for blocking the deformation portions from falling off the movable grooves are further arranged at two ends of the body.
Preferably, the lubricating sleeve is made of UPE plastic, and the diameter of the straight through hole is 0.1-0.3mm smaller than the large diameter of the threaded section.
Preferably, the height of the movable groove is 2-3mm higher than the height of the lubricating sleeve.
Preferably, the inclination of the cross section of the round table surface is 8-10 degrees, and the deformation parts are distributed at the same angle of 30 degrees with the center of the lubricating sleeve.
A manufacturing process of a high-strength antirust nut comprises the following steps:
s1: selecting steel ingots with proper size and specification, heating the steel ingots to 750-800 ℃, then preserving heat for 2-3 hours, then heating the steel ingots to 1000-1100 ℃ and then preserving heat for 0.5-1 hour;
s2: repeatedly upsetting and drawing the steel ingot heated in the step S1 until the forging ratio is more than 3, forging the steel ingot into a blank with the size being more than 1-2mm of a finished product by using an inner hexagonal die, and then cooling the blank to normal temperature by using cooling oil;
s3: polishing and grinding an oxide layer on the surface of a blank, turning an inner hole and a movable groove on the blank by using a lathe, positioning and finish-milling the outer surface of the blank by using the inner hole, positioning and finish-turning the inner hole by using the outer surface of the blank, and tapping the inner hole to obtain a semi-finished product;
s4: quenching and tempering the semi-finished product in a heat treatment furnace, cooling, and then putting the semi-finished product in a sand blasting machine to remove oxide layers on the inner and outer surfaces of the semi-finished product for the second time;
s5: and (3) spraying antirust coatings on the inner and outer surfaces of the semi-finished product in the step (S4), cleaning the semi-finished product with lubricating oil, and pressing the lubricating sleeve into the movable groove to obtain the finished product.
Preferably, the steel ingot comprises the following components in percentage by weight: 0.06-0.1% of carbon, 1.2-1.5% of silicon, 2-4% of copper, 2-3% of tungsten, 1.3-1.6% of manganese, 3-5% of chromium, less than or equal to 0.03% of sulfur and the balance of iron.
Preferably, the semi-finished product is heated to 750-800 ℃ and then is kept for 20-30min during quenching, then is quenched into oil with the temperature of 180-260 ℃ and is kept for 10-15min, then the product is taken out and is cooled in air at room temperature, and tempering treatment is that the semi-finished product is heated to 400-450 ℃ and then is kept for 1-2h.
Compared with the prior art, the invention has the beneficial effects that:
1. the nut contains two lubricated covers, and lubricated cover receives and can slide in the movable groove after the thrust, and the round platform face in its outside can receive the extrusion of movable groove lateral wall for deformation portion produces deformation towards the center of straight through-hole, so that the bolt when screw in or screw out in the nut in, can lubricate the bolt and rust cleaning, make both more smooth and easy when the knob, and when the lubrication sleeve is contradicted with the bolt, can seal the junction of nut and bolt, thereby prevent that the screw thread section in the nut from rust.
2. During manufacturing, the nut is subjected to repeated forging treatment, so that internal tissue crystals are more uniform, the nut has higher hardness after being subjected to quenching and tempering treatment after machining, and carbon, tungsten, chromium, manganese and iron elements with reasonable proportions are adopted in the nut, so that the hardness of the nut is further improved, and the nut is more wear-resistant.
Drawings
FIG. 1 is a schematic view of a high strength rust resistant nut of the present invention;
FIG. 2 is a cross-sectional view of the body of the present invention;
FIG. 3 is a schematic view of a lubrication sleeve according to the present invention;
reference numerals: 1. a body; 2. a lubricating sleeve; 3. a threaded section; 4. an annular boss; 5. a movable groove; 6. a through groove; 7. a through hole; 8. a deformation section; 9. and a connecting part.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in figures 1-3, a high-strength antirust nut comprises a body 1 and a lubricating sleeve 2, wherein a thread section 3 is arranged on the inner side of the middle of the body 1, movable grooves 5 are formed in two sides of the thread section 3, one end, close to the thread section 3, of each movable groove 5 is small in diameter, the other end is large in diameter, the height of the lubricating sleeve 2 is smaller than that of each movable groove 5, the lubricating sleeve 2 is arranged in each movable groove 5, a through hole 7 is formed in the inner side of the lubricating sleeve 2, a circular table surface matched with the movable grooves 5 is arranged on the outer side of the lubricating sleeve 2, the lubricating sleeve 2 comprises a connecting part 9 and deformation parts 8, the deformation parts 8 are provided with a plurality of through grooves 6, the deformation parts 8 are arranged between two adjacent deformation parts 8, the deformation parts 8 are far away from the thread section 3 during installation, the two ends of the body 1 are further provided with annular bosses 4 used for blocking the deformation parts 8 from falling off from the movable grooves 5, the lubricating sleeve 2 is made of UPE plastic, the diameter of the through holes 7 is smaller than the large diameter of the thread section 3 by 0.1-0.3mm, the height of each movable groove 5 is 2-3mm, the inclination of the circular table surface is 8 is larger than that of the lubricating sleeve 2, the through holes are matched with the movable grooves 5, the through grooves are formed through holes, the through grooves are between the through grooves and, and are 8, and have an inclination angles of the cross section is 10 degrees, and are distributed at the same angle as 2 degrees at the center as 2 degrees as the same angle as at the angle.
According to the nut designed by the invention, when the nut is connected with a bolt, the bolt firstly abuts against the first lubrication sleeve 2 from one end, because the through hole 7 in the lubrication sleeve 2 is smaller than the large diameter of the thread of the bolt, the first lubrication sleeve 2 slides a small distance towards the thread section 3 until the lubrication sleeve 2 is subjected to extrusion force and cannot slide, the bolt is screwed into the lubrication sleeve 2 and smoothly enters the thread section 3, in the process, the bolt and the lubrication sleeve 2 are rubbed with each other, the lubrication sleeve 2 is made of UPE plastic, the self-lubrication effect is achieved, the friction force is small, and when the two lubrication sleeves are rubbed with each other, the lubrication sleeve 2 can fall off part of plastic particles due to friction, and moves to the thread section 3 along with the bolt, so that the resistance of a knob when the nut is connected with the bolt can be reduced, the second lubrication sleeve 2 is pushed away from the thread section 3 after the bolt passes through the thread section 3, the deformation of the bolt is small, no large resistance exists, the two lubrication sleeves 2 are positioned at two sides of the thread section 3 and abut against the bolt, the thread section 3 can be sealed, and impurities can be effectively prevented from entering.
When the bolt is unscrewed from the nut, the bolt can drive the second lubrication sleeve 2 to move towards the thread section 3 for a small distance until the deformation of the deformation part 8 reaches the maximum, one end of the bolt firstly rubs with the second lubrication sleeve 2 when the bolt is withdrawn towards the thread section 3, so that part of rust on the surface of the bolt can be removed, the condition that the rust falls into the thread section 3 to cause clamping can be avoided, the bolt can be lubricated, the bolt can be smoothly withdrawn from the thread section 3, the first lubrication sleeve 2 moves towards the direction away from the thread section 3, the deformation of the deformation part 8 is smaller, the resistance to the bolt is reduced, the whole structure can maintain the connection strength of the nut and also can be lubricated and rust-proof when designed, and the structural design is ingenious and reasonable.
A manufacturing process of a high-strength antirust nut comprises the following steps:
s1: selecting steel ingots with proper size specifications, wherein the steel ingots comprise the following components in percentage: 0.06-0.1% of carbon, 1.2-1.5% of silicon, 2-4% of copper, 2-3% of tungsten, 1.3-1.6% of manganese, 3-5% of chromium, less than or equal to 0.03% of sulfur and the balance of iron, heating the alloy to 750-800 ℃, then preserving heat for 2-3 hours, then raising the temperature to 1000-1100 ℃ and then continuously preserving heat for 0.5-1 hour;
s2: repeatedly upsetting and drawing the steel ingot heated in the step S1 until the forging ratio is more than 3, forging the steel ingot into a blank with the size being more than 1-2mm of a finished product by using an inner hexagonal die, and then cooling the blank to normal temperature by using cooling oil;
s3: polishing and grinding an oxide layer on the surface of a blank, turning an inner hole and a movable groove 5 on the blank by using a lathe, positioning and finish-milling the outer surface of the blank by using the inner hole, positioning and finish-turning the inner hole by using the outer surface of the blank, and tapping the inner hole to obtain a semi-finished product;
s4: the semi-finished product is put into a heat treatment furnace to be quenched and tempered successively, the semi-finished product is heated to 750-800 ℃ and then is kept at the temperature for 20-30min during quenching, then is quenched into oil with the temperature of 180-260 ℃ and is kept at the temperature for 10-15min, then the product is taken out and is cooled in air at room temperature, the tempering treatment is that the semi-finished product is heated to 400-450 ℃, is kept at the temperature for 1-2h, and is put into a sand blasting machine to remove oxide layers on the inner and outer surfaces of the semi-finished product for the second time after being cooled;
s5: and (3) spraying antirust coatings on the inner and outer surfaces of the semi-finished product in the step (S4), cleaning the semi-finished product with lubricating oil, and pressing the lubricating sleeve 22 into the movable groove 5 to obtain the finished product.
By adopting the technical scheme, the nut raw materials adopt carbon, tungsten, chromium, manganese and iron in proper proportion, the nut can be ensured to have the basic characteristic of higher hardness, the internal tissue components of the nut are uniform through forging treatment in the manufacturing process, and the nut is enabled to have high-strength performance and also to be resistant to abrasion after quenching and tempering heat treatment, so that the service life of the nut is effectively prolonged.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The utility model provides a high strength rust-resistant nut, includes body (1) and lubricated cover (2), its characterized in that, the middle part inboard of body (1) is provided with screw thread section (3), the both sides of screw thread section (3) have movable groove (5), the one end diameter that movable groove (5) is close to screw thread section (3) is little, and the other end diameter is big, the height that highly is less than movable groove (5) of lubricated cover (2) to install in movable groove (5), the inboard of lubricated cover (2) is through hole (7), and the outside is with movable groove (5) complex mesa, lubricated cover (2) include connecting portion (9) and deformation portion (8), deformation portion (8) are provided with a plurality ofly, adjacent two have logical groove (6) between deformation portion (8), deformation portion (8) keep away from screw thread section (3) setting when the installation, the both ends of body (1) still are provided with annular boss (4) that are arranged in blocking deformation portion (8) and drop from movable groove (5).
2. A high strength rust resistant nut as claimed in claim 1, wherein said lubrication sleeve (2) is made of UPE plastic, and said through hole (7) has a diameter 0.1-0.3mm smaller than the major diameter of the threaded section (3).
3. A high strength rust inhibitive nut according to claim 1, wherein the height of said movable groove (5) is 2-3mm higher than the height of the lubricating sleeve (2).
4. A high strength rust inhibitive nut according to claim 1, wherein the inclination of the cross section of the truncated cone surface is 8-10 ° and the deformed portion (8) is equiangularly distributed at 30 ° with respect to the center of the lubrication sleeve (2).
5. The manufacturing process of the high-strength antirust nut is characterized by comprising the following steps of:
s1: selecting steel ingots with proper size and specification, heating the steel ingots to 750-800 ℃, then preserving heat for 2-3 hours, then heating the steel ingots to 1000-1100 ℃ and then preserving heat for 0.5-1 hour;
s2: repeatedly upsetting and drawing the steel ingot heated in the step S1 until the forging ratio is more than 3, forging the steel ingot into a blank with the size being more than 1-2mm of a finished product by using an inner hexagonal die, and then cooling the blank to normal temperature by using cooling oil;
s3: polishing and grinding an oxide layer on the surface of a blank, turning an inner hole and a movable groove (5) on the blank by using a lathe, positioning and finish milling the outer surface of the blank by using the inner hole, positioning and finish turning the inner hole by using the outer surface of the blank, and tapping the inner hole to obtain a semi-finished product;
s4: quenching and tempering the semi-finished product in a heat treatment furnace, cooling, and then putting the semi-finished product in a sand blasting machine to remove oxide layers on the inner and outer surfaces of the semi-finished product for the second time;
s5: and (3) spraying antirust coatings on the inner and outer surfaces of the semi-finished product in the step (S4), cleaning the semi-finished product with lubricating oil, and then pressing the lubricating sleeve (2) into the movable groove (5) to obtain the finished product.
6. The process for manufacturing a high-strength rust-preventive nut according to claim 5, characterized in that said steel ingot comprises, in terms of composition ratio: 0.06-0.1% of carbon, 1.2-1.5% of silicon, 2-4% of copper, 2-3% of tungsten, 1.3-1.6% of manganese, 3-5% of chromium, less than or equal to 0.03% of sulfur and the balance of iron.
7. The process for manufacturing a high-strength rust-preventive nut according to claim 5, characterized in that the semi-finished product is heated to 750-800 ℃ and then kept at the temperature for 20-30min during quenching, then quenched into oil with the temperature of 180-260 ℃ and kept at the temperature for 10-15min, then the product is taken out and cooled in air at room temperature, and tempering is performed by heating the semi-finished product to 400-450 ℃ and then keeping at the temperature for 1-2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310379044.9A CN116379055A (en) | 2023-03-31 | 2023-03-31 | High-strength antirust nut and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310379044.9A CN116379055A (en) | 2023-03-31 | 2023-03-31 | High-strength antirust nut and manufacturing process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116379055A true CN116379055A (en) | 2023-07-04 |
Family
ID=86976629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310379044.9A Pending CN116379055A (en) | 2023-03-31 | 2023-03-31 | High-strength antirust nut and manufacturing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116379055A (en) |
-
2023
- 2023-03-31 CN CN202310379044.9A patent/CN116379055A/en active Pending
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