CN106931018A - A kind of countersunk head cross Self Drilling Screws and its processing technology - Google Patents
A kind of countersunk head cross Self Drilling Screws and its processing technology Download PDFInfo
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- CN106931018A CN106931018A CN201710225472.0A CN201710225472A CN106931018A CN 106931018 A CN106931018 A CN 106931018A CN 201710225472 A CN201710225472 A CN 201710225472A CN 106931018 A CN106931018 A CN 106931018A
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- Prior art keywords
- screw
- cutting edge
- screw rod
- drill bit
- threading
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- 238000005553 drilling Methods 0.000 title claims abstract description 94
- 238000005516 engineering process Methods 0.000 title claims description 15
- 238000005520 cutting process Methods 0.000 claims abstract description 114
- 238000005496 tempering Methods 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- 238000000465 moulding Methods 0.000 claims description 15
- 238000010791 quenching Methods 0.000 claims description 15
- 230000000171 quenching effect Effects 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 10
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 10
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000005554 pickling Methods 0.000 claims description 6
- 229910052684 Cerium Inorganic materials 0.000 claims description 5
- 229910052693 Europium Inorganic materials 0.000 claims description 5
- 229910052765 Lutetium Inorganic materials 0.000 claims description 5
- 229910052779 Neodymium Inorganic materials 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 5
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229910052733 gallium Inorganic materials 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052763 palladium Inorganic materials 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 5
- 239000010452 phosphate Substances 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 229910052702 rhenium Inorganic materials 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 229910052718 tin Inorganic materials 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- 229910052727 yttrium Inorganic materials 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 8
- 238000010079 rubber tapping Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000010931 gold Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
- F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/007—Ferrous alloys, e.g. steel alloys containing silver
-
- 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
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
-
- 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
- F16B33/004—Sealing; Insulation
-
- 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
Abstract
The invention discloses a kind of countersunk head cross Self Drilling Screws, including screw head, screw rod, drilling tail and positioning drill bit, screw head is round table-like, the lower end of screw head is affixed with the upper end of screw rod, screw rod lower end is affixed with drilling tail, the bottommost of drilling tail is provided with main cutting edge, being sequentially arranged above for main cutting edge is provided with the second cutting edge and the 3rd cutting edge, drilling tail chip area is designed between main cutting edge and the second cutting edge and between the second cutting edge and the 3rd cutting edge, the bottom center of drilling tail is connected with positioning drill bit, positions the diameter of the diameter less than screw rod of drill bit；The present invention is connected with positioning drill bit due to the bottom center of drilling tail, because the diameter for positioning drill bit is small, it is easy to drill and positions, first by positioning drill bit boring positioning, improve accuracy during tightening operation, and after drill bit is positioned into material internal, screw inherently should not be hand steered again, improves tightening operation efficiency.
Description
Technical field
The present invention relates to a kind of countersunk head cross Self Drilling Screws and its processing technology, belong to fastening or fixing component technology neck
Domain.
Background technology
Fastener is to fasten two or more parts（Or component）It is fastenedly connected what is used during as an entirety
The general name of one class machine components, is widely used in various machineries, equipment, vehicle, ship, railway, bridge, building, structure, work
Above, its feature is various description, and performance purposes is different for tool, instrument, chemical industry, instrument and articles for use etc., and standardization,
Seriation, unitized degree are also high.
Screw is a kind of the most frequently used fastening part, using object inclined-plane circular rotating and frictional force physics and
Mathematical principle, the incremental instrument for fastening implements parts；Self-tapping screw is the new invention of people in recent years, and self-tapping screw is
There is the screw of self tapping drill head screw front end, and it does not need attaching nut to use, and the afterbody for being also tapping screw, self-tapping screw is in
Drilling tail or fine stern shape, without elder generation on workpiece grooved bit silk, can directly in setting material, drilling, tapping, lock on basic material
Tightly, compared with plain screw, the tough pull out force and maintenance energy of self-tapping screw are high, after combination the time it is long will not also loosen, use simple peace
Entirely, punching tapping one-pass operation, time and labour saving is laborsaving；Self-tapping screw is mainly used in the fastening of fixed metal plate such as steel plate
Part, is generally used for sealed metallic plate and nonmetal plate, is such as used to for calcium silicate board with microporous, plasterboard and various planks to be directly anchored to gold
On category sheet material；The rational Self Drilling Screws of design structure, can make metallic plate and matching board sealed firmly, it is to avoid the breakage of matching board,
Scratch, it is easy for installation.
Existing Self Drilling Screws also there is a problem that it is certain, it is fashionable in drill screw drill, Self Drilling Screws locking when, hold
Easily skid, the position of locking often shifts, and sealing is poor, the thing such as outside water, dust is easily accessible screw connection
Portion, reduces bonding strength and connection lifetime；Existing Self Drilling Screws non-refractory, easily oxidation, perishable, not anti-embroidery.
The content of the invention
The technical problem to be solved in the present invention is, in view of the shortcomings of the prior art, proposing a kind of countersunk head cross of registration
Self Drilling Screws.
The present invention is that the technical scheme for solving above-mentioned technical problem proposition is：A kind of countersunk head cross Self Drilling Screws, including spiral shell
Head, screw rod, drilling tail and positioning drill bit, screw head is for round table-like, and the lower end of screw head is affixed with the upper end of screw rod, screw rod lower end and drilling tail
Affixed, the bottommost of drilling tail is provided with main cutting edge, and the second cutting edge is provided with above main cutting edge, is set above the second cutting edge
There is the 3rd cutting edge, drilling tail is designed between main cutting edge and the second cutting edge and between the second cutting edge and the 3rd cutting edge
Chip area, the bottom center of drilling tail is connected with positioning drill bit, positions the diameter of the diameter less than screw rod of drill bit；
The mass percent of each composition is in the countersunk head cross Self Drilling Screws：C：0.02-0.03%, Al:0.66-1.13%,Zn:
1.23-1.59%,Mn：0.17-0.24%, Cr：0.03-0.07%, Ni：0.14-0.29%, V：0.03-0.06%, Mo：0.05-
0.12%, Ti：0.23-0.51%, B：0.02-0.05%, Pd：0.03-0.08%,Pt：0.35-0.45%,W：0.13-0.26%,Nd：
0.11-0.24%,Ce：0.01-0.05%,Eu：0.02-0.05%,Lu:0.05-0.17%, Au：0.13-0.27%, Ag:0.66-
1.14%, Ga：0.01-0.02%, Y：0.11-0.23%, Sn：0.77-1.24%, Zr：0.02-0.05%, Re：0.01-0.03%,
Bi：0.04-0.07%, magnesia：0.12-0.16%, manganese dioxide：0.05-0.08%, balance of Fe.
The improvement of above-mentioned technical proposal is：The bottommost for positioning drill bit is provided with the 4th cutting edge, the top of the 4th cutting edge
Be provided with the 5th cutting edge, the 6th cutting edge be provided with above the 5th cutting edge, between the 4th cutting edge and the 5th cutting edge and
It is designed with positioning flute of drill between 5th cutting edge and the 6th cutting edge.
The improvement of above-mentioned technical proposal is：Screw head, screw rod, drilling tail and positioning drill bit are plated with pure aluminum coating.
The improvement of above-mentioned technical proposal is：Screw rod upper end is embedded at screw head and is equipped with a circle water-swellable waterstop, meets
The outer surface of water expansion water-stop band and the flush with outer surface of screw rod.
The improvement of above-mentioned technical proposal is：Screw thread is formed with screw rod.
The improvement of above-mentioned technical proposal is：The side of screw head is provided with cutting skewed slot.
The processing technology of countersunk head cross Self Drilling Screws of the invention, comprises the following steps：
(i) blanking：With metal wire rod as raw material, unidirectionally moved by moveable scissor, prepared by the volume of countersunk head cross Self Drilling Screws
Cylindrical blank；
(ii) cold-heading：Cylindrical blank is carried out into cold-heading molding using cold-heading equipment, screw head, the spiral shell of screw are formed by mould molding
Bar, drilling tail and positioning drill bit, groove is enclosed in the junction cold-heading molding one of screw rod upper end and screw head；
(iii) threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is comprised the following steps that
A, first time threading, shallow thread is rubbed using threading equipment on the screw rod of screw；
B, second threading, threading intensification is carried out using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading, final spiral shell is rubbed on the basis of preceding threading twice using threading equipment on the screw rod of screw
Line；
(iv) cleaning is deoiled；
(v) screw is heat-treated, concrete technology is：
A, heating：Screw is heated to 650-670 DEG C, and is incubated 3-4 hours；
B, cooling：After using the air-cooled cooldown rate with 10-12 DEG C/s to accelerate to be cooled to 430-440 DEG C by screw, then it is air cooled to
Room temperature；
C, once it is tempered：After screw is heated into 550-570 DEG C of tempering 40-45min, warm 30-45s is treated, make screw temperature uniform
Change, after accelerating to be cooled to 350-360 DEG C with the cooldown rate of 15-18 DEG C/s afterwards, then be air cooled to room temperature；
D, screw is heated to 870 DEG C, quenching 50-55min is carried out in quenching oil, then be air cooled to room temperature；
E, double tempering：By the screw after quenching be heated to 600-610 DEG C tempering 30-35min, after be air cooled to room temperature；
(vi) pickling：Screw after tempering is placed in the hydrochloric acid that concentration is 26-30% and soaks 15-18min, clear water is cleaned, then is placed in
Concentration is finally cleaned to soak 15-20min in 3-4% phosphate solutions with clear water；
(vii) electroplate：Pure aluminum coating is electroplated in screw outer surface；
(viii) clean and dry；
(ix) install one in a circle groove of screw rod upper end and the junction of screw head and enclose water-swellable waterstop, the water-swellable
The outer surface of waterstop and the flush with outer surface of screw rod；
(x) pack.
The present invention is using the beneficial effect of above-mentioned technical proposal：
（1）Countersunk head cross Self Drilling Screws of the invention is connected with positioning drill bit due to the bottom center of drilling tail, due to positioning drill bit
Diameter it is small, be easy to drill and position, first by positioning drill bit boring positioning, improve accuracy during tightening operation, and when fixed
After position drill bit enters material internal, screw inherently should not be hand steered again, improves tightening operation efficiency；
（2）Countersunk head cross Self Drilling Screws of the invention is provided with main cutting edge, the second cutting edge and the 3rd cutting edge due to drilling tail,
Positioning drill bit is provided with the 4th cutting edge, the 5th cutting edge and the 6th cutting edge, and by the cooperation of multiple cutting edges, drilling locking is more
Plus it is easy and convenient；
（3）Countersunk head cross Self Drilling Screws of the invention is plated with pure aluminum coating due to screw head, screw rod, drilling tail and positioning drill bit,
Pure aluminum coating outer surface can form the oxide-film of densification, substantially increase the high temperature resistant of screw, corrosion-resistant and anti-embroidery performance, extend
The service life of screw；
（4）Countersunk head cross Self Drilling Screws of the invention is equipped with a circle water-swellable sealing because screw rod upper end is embedded at screw head
Band, expands when meeting water, improves the sealing of screw, further increases the corrosion-resistant and anti-embroidery performance of screw, it is ensured that spiral shell
The stability of silk locking；
（5）Using the method for multiple threading when countersunk head cross Self Drilling Screws of the invention is due to threading, in the screw thread process of screw
When it is incremental, the screw thread for processing is more fine accurate；
（6）When current screw is processed, threading is once completed, and the substandard products spiral shell such as screw thread process deviation and screw thread disconnection easily occurs
Silk, using the method for multiple threading when countersunk head cross Self Drilling Screws of the invention is due to threading, gradually deepens screw thread, greatly drops
Low defect rate；
（7）Countersunk head cross Self Drilling Screws of the invention can control the laterally and longitudinally recessed of screw due to screw being heat-treated
The face crack for causing is fallen into, increases service life；
（8）Countersunk head cross Self Drilling Screws of the invention is tempered energy for the first time due to screw is carried out into heat treatment by double tempering
Enough rotary austenites are formed on lath circle or lath beam circle, and further enrichment alloying element is steady to improve in insulating process
It is qualitative；Ferrite lath beam is then replied in insulating process, while the harmful element in ferrite is also discharged to revolution Austria
In family name's body, so as to improve substrate performance；Second tempering can make rotary austenite be enriched with foot on the premise of proof strength
Enough alloying elements, make few net carbide, are more uniformly distributed tissue, can holding structure stabilization, further enhance contact
Fatigue strength and impact flexibility；
（9）Countersunk head cross Self Drilling Screws of the invention eliminates the oxidation of screw surface due to carrying out pickling before plating step
Film so that the pure aluminum coating of screw plating is more uniform, electroplates more efficient.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the structural representation of embodiment of the present invention countersunk head cross Self Drilling Screws；
Fig. 2 is the partial structural diagram at the positioning drill bit of embodiment of the present invention countersunk head cross Self Drilling Screws；
Wherein：1- screw heads；2- cuts skewed slot；3- water-swellable waterstops；4- screw rods；5- screw threads；6- drilling tails；7- positions drill bit；
8- main cutting edges；The cutting edges of 9- second；The cutting edges of 10- the 3rd；11- drilling tail chip areas；The cutting edges of 12- the 4th；13- the 5th cuts
Sword；The cutting edges of 14- the 6th；15- positions flute of drill.
Specific embodiment
Embodiment 1
The countersunk head cross Self Drilling Screws of the present embodiment, as illustrated in fig. 1 and 2, including screw head 1, screw rod 4, drilling tail 6 and positioning drill bit 7,
Screw head 1 is round table-like, and the side of screw head 1 is provided with cutting skewed slot 2；
The lower end of screw head 1 is affixed with the upper end of screw rod 4, and the lower end of screw rod 4 is affixed with drilling tail 6, and screw thread 5 is formed with screw rod 4；Drilling tail 6
Bottommost be provided with main cutting edge 8, the top of main cutting edge 8 is provided with the second cutting edge 9, and the top of the second cutting edge 9 is provided with
Three cutting edges 10, are designed between the cutting edge 9 of main cutting edge 8 and second and between the second cutting edge 9 and the 3rd cutting edge 10
Drilling tail chip area 11, the bottom center of drilling tail 6 is connected with positioning drill bit 7, positions the diameter of the diameter less than screw rod 4 of drill bit 7；
The bottommost for positioning drill bit 7 is provided with the 4th cutting edge 12, and the top of the 4th cutting edge 12 is provided with the 5th cutting edge 13, the 5th
The top of cutting edge 13 is provided with the 6th cutting edge 14, between the 4th cutting edge 12 and the 5th cutting edge 13 and the 5th cutting edge 13
And the 6th be designed between cutting edge 14 positioning flute of drill 15；
Screw head 1, screw rod 4, drilling tail 6 and positioning drill bit 7 are plated with pure aluminum coating；The upper end of screw rod 4 is embedded at screw head 1 and is equipped with
One circle water-swellable waterstop 3, the outer surface of water-swellable waterstop 3 and the flush with outer surface of screw rod 4.
The mass percent of each composition is in the countersunk head cross Self Drilling Screws of the present embodiment：C：0.02%, Al:0.66%,Zn:
1.23%,Mn：0.17%, Cr：0.03%, Ni：0.14%, V：0.03%, Mo：0.05%, Ti：0.23%, B：0.02%, Pd：0.03%,
Pt：0.35%,W：0.13%,Nd：0.11%,Ce：0.01%,Eu：0.02%,Lu:0.05%, Au：0.13%, Ag:0.66%, Ga：
0.01%, Y：0.11%, Sn：0.77%, Zr：0.02%, Re：0.01%, Bi：0.04%, magnesia：0.12%, manganese dioxide：
0.05%, balance of Fe.
The processing technology of countersunk head cross Self Drilling Screws of the invention, comprises the following steps：
(i) blanking：With metal wire rod as raw material, unidirectionally moved by moveable scissor, prepared by the volume of countersunk head cross Self Drilling Screws
Cylindrical blank；
(ii) cold-heading：Cylindrical blank is carried out into cold-heading molding using cold-heading equipment, screw head, the spiral shell of screw are formed by mould molding
Bar, drilling tail and positioning drill bit, groove is enclosed in the junction cold-heading molding one of screw rod upper end and screw head；
(iii) threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is comprised the following steps that
A, first time threading, shallow thread is rubbed using threading equipment on the screw rod of screw；
B, second threading, threading intensification is carried out using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading, final spiral shell is rubbed on the basis of preceding threading twice using threading equipment on the screw rod of screw
Line；
(iv) cleaning is deoiled；
(v) screw is heat-treated, concrete technology is：
A, heating：Screw is heated to 650 DEG C, and is incubated 3 hours；
B, cooling：After using the air-cooled cooldown rate with 10 DEG C/s to accelerate to be cooled to 430 DEG C by screw, then it is air cooled to room temperature；
C, once it is tempered：After screw is heated into 550 DEG C of tempering 40min, warm 30s is treated, make screw equalizing temperature, afterwards with 15
DEG C/after the cooldown rate of s accelerates to be cooled to 350 DEG C, then it is air cooled to room temperature；
D, screw is heated to 870 DEG C, quenching 50min is carried out in quenching oil, then be air cooled to room temperature；
E, double tempering：By the screw after quenching be heated to 600 DEG C tempering 30min, after be air cooled to room temperature；
(vi) pickling：Screw after tempering is placed in 15min is soaked in the hydrochloric acid that concentration is 26%, clear water is cleaned, then be placed in concentration and be
15min is soaked in 3% phosphate solution, is finally cleaned with clear water；
(vii) electroplate：Pure aluminum coating is electroplated in screw outer surface；
(viii) clean and dry；
(ix) install one in a circle groove of screw rod upper end and the junction of screw head and enclose water-swellable waterstop, the water-swellable
The outer surface of waterstop and the flush with outer surface of screw rod；
(x) pack.
The present embodiment, first by positioning drill bit boring positioning, improves the accuracy during tightening operation when specifically used, and
After drill bit is positioned into material internal, screw inherently should not be hand steered again, improves tightening operation efficiency.
Embodiment 2
The countersunk head cross Self Drilling Screws of the present embodiment, as illustrated in fig. 1 and 2, including screw head 1, screw rod 4, drilling tail 6 and positioning drill bit 7,
Screw head 1 is round table-like, and the side of screw head 1 is provided with cutting skewed slot 2；
The lower end of screw head 1 is affixed with the upper end of screw rod 4, and the lower end of screw rod 4 is affixed with drilling tail 6, and screw thread 5 is formed with screw rod 4；Drilling tail 6
Bottommost be provided with main cutting edge 8, the top of main cutting edge 8 is provided with the second cutting edge 9, and the top of the second cutting edge 9 is provided with
Three cutting edges 10, are designed between the cutting edge 9 of main cutting edge 8 and second and between the second cutting edge 9 and the 3rd cutting edge 10
Drilling tail chip area 11, the bottom center of drilling tail 6 is connected with positioning drill bit 7, positions the diameter of the diameter less than screw rod 4 of drill bit 7；
The bottommost for positioning drill bit 7 is provided with the 4th cutting edge 12, and the top of the 4th cutting edge 12 is provided with the 5th cutting edge 13, the 5th
The top of cutting edge 13 is provided with the 6th cutting edge 14, between the 4th cutting edge 12 and the 5th cutting edge 13 and the 5th cutting edge 13
And the 6th be designed between cutting edge 14 positioning flute of drill 15；
Screw head 1, screw rod 4, drilling tail 6 and positioning drill bit 7 are plated with pure aluminum coating；The upper end of screw rod 4 is embedded at screw head 1 and is equipped with
One circle water-swellable waterstop 3, the outer surface of water-swellable waterstop 3 and the flush with outer surface of screw rod 4.
The mass percent of each composition is in the countersunk head cross Self Drilling Screws of the present embodiment：C：0.03%, Al:0.77%,Zn:
1.42%,Mn：0.21%, Cr：0.05%, Ni：0.18%, V：0.04%, Mo：0.08%, Ti：0.29%, B：0.03%, Pd：0.06%,
Pt：0.39%,W：0.18%,Nd：0.18%,Ce：0.03%,Eu：0.03%,Lu:0.05-0.17%, Au：0.16%, Ag:0.78%,
Ga：0.01%, Y：0.15%, Sn：0.94%, Zr：0.03%, Re：0.02%, Bi：0.05%, magnesia：0.14%, manganese dioxide：
0.06%, balance of Fe.
The processing technology of countersunk head cross Self Drilling Screws of the invention, comprises the following steps：
(i) blanking：With metal wire rod as raw material, unidirectionally moved by moveable scissor, prepared by the volume of countersunk head cross Self Drilling Screws
Cylindrical blank；
(ii) cold-heading：Cylindrical blank is carried out into cold-heading molding using cold-heading equipment, screw head, the spiral shell of screw are formed by mould molding
Bar, drilling tail and positioning drill bit, groove is enclosed in the junction cold-heading molding one of screw rod upper end and screw head；
(iii) threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is comprised the following steps that
A, first time threading, shallow thread is rubbed using threading equipment on the screw rod of screw；
B, second threading, threading intensification is carried out using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading, final spiral shell is rubbed on the basis of preceding threading twice using threading equipment on the screw rod of screw
Line；
(iv) cleaning is deoiled；
(v) screw is heat-treated, concrete technology is：
A, heating：Screw is heated to 660 DEG C, and is incubated 3.5 hours；
B, cooling：After using the air-cooled cooldown rate with 11 DEG C/s to accelerate to be cooled to 435 DEG C by screw, then it is air cooled to room temperature；
C, once it is tempered：After screw is heated into 560 DEG C of tempering 43min, warm 38s is treated, make screw equalizing temperature, afterwards with 16
DEG C/after the cooldown rate of s accelerates to be cooled to 355 DEG C, then it is air cooled to room temperature；
D, screw is heated to 870 DEG C, quenching 53min is carried out in quenching oil, then be air cooled to room temperature；
E, double tempering：By the screw after quenching be heated to 605 DEG C tempering 32min, after be air cooled to room temperature；
(vi) pickling：Screw after tempering is placed in 17min is soaked in the hydrochloric acid that concentration is 28%, clear water is cleaned, then be placed in concentration and be
18min is soaked in 4% phosphate solution, is finally cleaned with clear water；
(vii) electroplate：Pure aluminum coating is electroplated in screw outer surface；
(viii) clean and dry；
(ix) install one in a circle groove of screw rod upper end and the junction of screw head and enclose water-swellable waterstop, the water-swellable
The outer surface of waterstop and the flush with outer surface of screw rod；
(x) pack.
The present embodiment, first by positioning drill bit boring positioning, improves the accuracy during tightening operation when specifically used, and
After drill bit is positioned into material internal, screw inherently should not be hand steered again, improves tightening operation efficiency.
Embodiment 3
The countersunk head cross Self Drilling Screws of the present embodiment, as illustrated in fig. 1 and 2, including screw head 1, screw rod 4, drilling tail 6 and positioning drill bit 7,
Screw head 1 is round table-like, and the side of screw head 1 is provided with cutting skewed slot 2；
The lower end of screw head 1 is affixed with the upper end of screw rod 4, and the lower end of screw rod 4 is affixed with drilling tail 6, and screw thread 5 is formed with screw rod 4；Drilling tail 6
Bottommost be provided with main cutting edge 8, the top of main cutting edge 8 is provided with the second cutting edge 9, and the top of the second cutting edge 9 is provided with
Three cutting edges 10, are designed between the cutting edge 9 of main cutting edge 8 and second and between the second cutting edge 9 and the 3rd cutting edge 10
Drilling tail chip area 11, the bottom center of drilling tail 6 is connected with positioning drill bit 7, positions the diameter of the diameter less than screw rod 4 of drill bit 7；
The bottommost for positioning drill bit 7 is provided with the 4th cutting edge 12, and the top of the 4th cutting edge 12 is provided with the 5th cutting edge 13, the 5th
The top of cutting edge 13 is provided with the 6th cutting edge 14, between the 4th cutting edge 12 and the 5th cutting edge 13 and the 5th cutting edge 13
And the 6th be designed between cutting edge 14 positioning flute of drill 15；
Screw head 1, screw rod 4, drilling tail 6 and positioning drill bit 7 are plated with pure aluminum coating；The upper end of screw rod 4 is embedded at screw head 1 and is equipped with
One circle water-swellable waterstop 3, the outer surface of water-swellable waterstop 3 and the flush with outer surface of screw rod 4.
The mass percent of each composition is in the countersunk head cross Self Drilling Screws of the present embodiment：C：0.03%, Al:1.13%,Zn:
1.55%,Mn：0.24%, Cr：0.07%, Ni：0.29%, V：0.06%, Mo：0.12%, Ti：0.51%, B：0.04%, Pd：0.08%,
Pt：0.44%,W：0.26%,Nd：0.24%,Ce：0.05%,Eu：0.05%,Lu:0.17%, Au：0.27%, Ag:1.14%, Ga：
0.02%, Y：0.23%, Sn：1.24%, Zr：0.05%, Re：0.03%, Bi：0.07%, magnesia：0.16%, manganese dioxide：
0.08%, balance of Fe.
The processing technology of countersunk head cross Self Drilling Screws of the invention, comprises the following steps：
(i) blanking：With metal wire rod as raw material, unidirectionally moved by moveable scissor, prepared by the volume of countersunk head cross Self Drilling Screws
Cylindrical blank；
(ii) cold-heading：Cylindrical blank is carried out into cold-heading molding using cold-heading equipment, screw head, the spiral shell of screw are formed by mould molding
Bar, drilling tail and positioning drill bit, groove is enclosed in the junction cold-heading molding one of screw rod upper end and screw head；
(iii) threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is comprised the following steps that
A, first time threading, shallow thread is rubbed using threading equipment on the screw rod of screw；
B, second threading, threading intensification is carried out using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading, final spiral shell is rubbed on the basis of preceding threading twice using threading equipment on the screw rod of screw
Line；
(iv) cleaning is deoiled；
(v) screw is heat-treated, concrete technology is：
A, heating：Screw is heated to 670 DEG C, and is incubated 4 hours；
B, cooling：After using the air-cooled cooldown rate with 12 DEG C/s to accelerate to be cooled to 440 DEG C by screw, then it is air cooled to room temperature；
C, once it is tempered：After screw is heated into 570 DEG C of tempering 45min, warm 45s is treated, make screw equalizing temperature, afterwards with 18
DEG C/after the cooldown rate of s accelerates to be cooled to 360 DEG C, then it is air cooled to room temperature；
D, screw is heated to 870 DEG C, quenching 55min is carried out in quenching oil, then be air cooled to room temperature；
E, double tempering：By the screw after quenching be heated to 610 DEG C tempering 35min, after be air cooled to room temperature；
(vi) pickling：Screw after tempering is placed in 18min is soaked in the hydrochloric acid that concentration is 30%, clear water is cleaned, then be placed in concentration and be
20min is soaked in 4% phosphate solution, is finally cleaned with clear water；
(vii) electroplate：Pure aluminum coating is electroplated in screw outer surface；
(viii) clean and dry；
(ix) install one in a circle groove of screw rod upper end and the junction of screw head and enclose water-swellable waterstop, the water-swellable
The outer surface of waterstop and the flush with outer surface of screw rod；
(x) pack.
The present embodiment, first by positioning drill bit boring positioning, improves the accuracy during tightening operation when specifically used, and
After drill bit is positioned into material internal, screw inherently should not be hand steered again, improves tightening operation efficiency.
The present invention is not limited to above-described embodiment.The technical scheme that all use equivalents are formed, all falling within the present invention will
The protection domain asked.
Claims (7)
1. a kind of countersunk head cross Self Drilling Screws, it is characterised in that：Including screw head（1）, screw rod（4）, drilling tail（6）With positioning drill bit
（7）, the screw head（1）It is round table-like, the screw head（1）Lower end and the screw rod（4）Upper end it is affixed, the screw rod（4）
Lower end and the drilling tail（6）It is affixed, the drilling tail（6）Bottommost be provided with main cutting edge（8）, the main cutting edge（8）It is upper
Side is provided with the second cutting edge（9）, second cutting edge（9）Top be provided with the 3rd cutting edge（10）, the main cutting edge（8）
With the second cutting edge（9）Between and the second cutting edge（9）With the 3rd cutting edge（10）Between be designed with drilling tail chip area（11）,
The drilling tail（6）Bottom center be connected with positioning drill bit（7）, the positioning drill bit（7）Diameter be less than the screw rod（4）'s
Diameter；
The mass percent of each composition is in the countersunk head cross Self Drilling Screws：C：0.02-0.03%, Al:0.66-1.13%,Zn:
1.23-1.59%,Mn：0.17-0.24%, Cr：0.03-0.07%, Ni：0.14-0.29%, V：0.03-0.06%, Mo：0.05-
0.12%, Ti：0.23-0.51%, B：0.02-0.05%, Pd：0.03-0.08%,Pt：0.35-0.45%,W：0.13-0.26%,Nd：
0.11-0.24%,Ce：0.01-0.05%,Eu：0.02-0.05%,Lu:0.05-0.17%, Au：0.13-0.27%, Ag:0.66-
1.14%, Ga：0.01-0.02%, Y：0.11-0.23%, Sn：0.77-1.24%, Zr：0.02-0.05%, Re：0.01-0.03%,
Bi：0.04-0.07%, magnesia：0.12-0.16%, manganese dioxide：0.05-0.08%, balance of Fe.
2. countersunk head cross Self Drilling Screws according to claim 1, it is characterised in that：The positioning drill bit（7）Bottommost
It is provided with the 4th cutting edge（12）, the 4th cutting edge（12）Top be provided with the 5th cutting edge（13）, the 5th cutting edge
（13）Top be provided with the 6th cutting edge（14）, the 4th cutting edge（12）With the 5th cutting edge（13）Between and the 5th cut
Cut sword（13）With the 6th cutting edge（14）Between be designed with position flute of drill（15）.
3. countersunk head cross Self Drilling Screws according to claim 2, it is characterised in that：The screw head（1）, screw rod（4）, drilling tail
（6）With positioning drill bit（7）It is plated with pure aluminum coating.
4. countersunk head cross Self Drilling Screws according to claim 3, it is characterised in that：The screw rod（4）Upper end is near described
Screw head（1）Place is embedded and is equipped with a circle water-swellable waterstop（3）, the water-swellable waterstop（3）Outer surface and the spiral shell
Bar（4）Flush with outer surface.
5. countersunk head cross Self Drilling Screws according to claim 4, it is characterised in that：The screw rod（4）On be formed with screw thread.
6. countersunk head cross Self Drilling Screws according to claim 5, it is characterised in that：The screw head（1）Side be provided with
Cutting skewed slot（2）.
7. the processing technology of the countersunk head cross Self Drilling Screws described in any claim according to claim 1-6, its feature exists
In：Comprise the following steps：
(i) blanking：With metal wire rod as raw material, unidirectionally moved by moveable scissor, prepared by the volume of countersunk head cross Self Drilling Screws
Cylindrical blank；
(ii) cold-heading：Cylindrical blank is carried out into cold-heading molding using cold-heading equipment, screw head, the spiral shell of screw are formed by mould molding
Bar, drilling tail and positioning drill bit, groove is enclosed in the junction cold-heading molding one of screw rod upper end and screw head；
(iii) threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is comprised the following steps that
A, first time threading, shallow thread is rubbed using threading equipment on the screw rod of screw；
B, second threading, threading intensification is carried out using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading, final spiral shell is rubbed on the basis of preceding threading twice using threading equipment on the screw rod of screw
Line；
(iv) cleaning is deoiled；
(v) screw is heat-treated, concrete technology is：
A, heating：Screw is heated to 650-670 DEG C, and is incubated 3-4 hours；
B, cooling：After using the air-cooled cooldown rate with 10-12 DEG C/s to accelerate to be cooled to 430-440 DEG C by screw, then it is air cooled to
Room temperature；
C, once it is tempered：After screw is heated into 550-570 DEG C of tempering 40-45min, warm 30-45s is treated, make screw temperature uniform
Change, after accelerating to be cooled to 350-360 DEG C with the cooldown rate of 15-18 DEG C/s afterwards, then be air cooled to room temperature；
D, screw is heated to 870 DEG C, quenching 50-55min is carried out in quenching oil, then be air cooled to room temperature；
E, double tempering：By the screw after quenching be heated to 600-610 DEG C tempering 30-35min, after be air cooled to room temperature；
(vi) pickling：Screw after tempering is placed in the hydrochloric acid that concentration is 26-30% and soaks 15-18min, clear water is cleaned, then is placed in
Concentration is finally cleaned to soak 15-20min in 3-4% phosphate solutions with clear water；
(vii) electroplate：Pure aluminum coating is electroplated in screw outer surface；
(viii) clean and dry；
(ix) install one in a circle groove of screw rod upper end and the junction of screw head and enclose water-swellable waterstop, the water-swellable
The outer surface of waterstop and the flush with outer surface of screw rod；
(x) pack.
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|---|---|---|---|
| CN201710225472.0A CN106931018A (en) | 2017-04-07 | 2017-04-07 | A kind of countersunk head cross Self Drilling Screws and its processing technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225472.0A CN106931018A (en) | 2017-04-07 | 2017-04-07 | A kind of countersunk head cross Self Drilling Screws and its processing technology |
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Cited By (2)
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| CN107937830A (en) * | 2017-12-17 | 2018-04-20 | 苏州浩焱精密模具有限公司 | A kind of production technology of corrosion-resistant bolt |
| US11293473B2 (en) | 2019-01-25 | 2022-04-05 | Steven Priess | Self-driving masonry anchor |
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| US11293473B2 (en) | 2019-01-25 | 2022-04-05 | Steven Priess | Self-driving masonry anchor |
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