CN108278262A - A kind of novel countersunk head cross Self Drilling Screws and its preparation process - Google Patents
A kind of novel countersunk head cross Self Drilling Screws and its preparation process Download PDFInfo
- Publication number
- CN108278262A CN108278262A CN201810181658.5A CN201810181658A CN108278262A CN 108278262 A CN108278262 A CN 108278262A CN 201810181658 A CN201810181658 A CN 201810181658A CN 108278262 A CN108278262 A CN 108278262A
- Authority
- CN
- China
- Prior art keywords
- screw
- screw rod
- countersunk head
- coiled hair
- drilling screws
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000005496 tempering Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000010079 rubber tapping Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 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
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 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
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- F16B25/0094—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw the screw being assembled or manufactured from several components, e.g. a tip out of a first material welded to shaft of a second material
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a kind of novel countersunk head cross Self Drilling Screws and its preparation processes, the countersunk head cross Self Drilling Screws includes coiled hair, screw rod, drilling tail, steel disc and collision mat, the one end of the screw rod is fixedly connected with the coiled hair, the other end of the screw rod is fixedly connected with drilling tail, the coiled hair is using cylinder hexagon or round countersunk head structure, the coiled hair upper surface is equipped with cross Pan Kou, steel disc is installed below the coiled hair, steel disc is equipped with through-hole, the through-hole coordinates with the screw coaxial, the collision mat is equipped with axis hole, the collision mat upper end coordinates with steel disc lower end, axis hole coordinates with screw coaxial, the screw rod is equipped with the screw thread equidistantly arranged.The Self Drilling Screws antirust ability of the present invention is strong；Corrosion fatigue life is up to complete effect；By the way that steel disc to be mounted below coiled hair, collision mat upper end is bonded with steel disc lower end, axis hole lead screw coaxial cooperation, and Self Drilling Screws is made to have enough intensity simultaneously, has water-proof function, ensures its steady operation performance, improves service life.
Description
Technical field
The invention belongs to technical field of fastening, and in particular to a kind of novel countersunk head cross Self Drilling Screws and its prepare work
Skill.
Background technology
Fastener is to fasten two or more parts（Or component）It is used when being fastenedly connected as an entirety
The general name of a kind of machine components, be widely used in various machineries, equipment, vehicle, ship, railway, bridge, building, structure, tool,
Above, its feature is that description is various, and performance purposes is different for instrument, chemical industry, instrument and articles for use etc., and standardizes, is
Rowization, unitized degree are also high.
Screw is a kind of most common fastening part, using object inclined-plane circular rotating and frictional force physics and
Mathematical principle, the tool of incremental 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 in screw front end, it does not need attaching nut use, makes the tapping screw, the tail portion of self-tapping screw to be in yet
Drilling tail or fine stern shape can be directly in setting material, drilling, tapping, locks on basic material without the first grooved bit silk on workpiece
Tightly, compared with plain screw, the tough pull out force and maintenance energy of self-tapping screw are high, and time length will not loosen after combination, use simple peace
Entirely, tapping one-pass operation is punched, time and labour saving is laborsaving.Self-tapping screw is mainly used for the fastening of fixed metal plate such as steel plate
Part is generally used for sealed metallic plate and nonmetal plate, such as calcium silicate board with microporous, plasterboard and various planks to be directly anchored to gold
Belong on plank.The rational Self Drilling Screws of design structure, can enable metallic plate and matching board it is sealed securely, avoid matching board breakage,
It scratches, it is easy for installation.
There is also certain problems for existing Self Drilling Screws, fashionable in drill screw drill, and Self Drilling Screws holds in locking
It easily skids, and time-consuming and laborious；Existing Self Drilling Screws poor sealing, the objects such as external water, dust are easily accessible screw connection
Portion reduces bonding strength and connection lifetime.Existing Self Drilling Screws non-refractory is easy oxidation, is perishable, not anti-embroidery.
Invention content
Goal of the invention：The purpose of the present invention is to solve deficiencies in the prior art, provide a kind of novel countersunk head cross
Self Drilling Screws and its preparation process, the Self Drilling Screws antirust ability are strong；Corrosion fatigue life is up to complete effect；By the way that steel disc is pacified
Below coiled hair, collision mat upper end is bonded with steel disc lower end, axis hole lead screw coaxial cooperation, and Self Drilling Screws is made to have enough
Intensity simultaneously, has water-proof function, ensures its steady operation performance, improves service life.
Technical solution：A kind of novel countersunk head cross Self Drilling Screws of the present invention, including coiled hair, screw rod, drilling tail, steel disc
And collision mat, the one end of the screw rod are fixedly connected with the coiled hair, the other end of the screw rod is fixedly connected with drilling tail,
Steel disc is installed, steel disc is equipped with through-hole, and the through-hole coordinates with the screw coaxial, on the collision mat below the coiled hair
Equipped with axis hole, the collision mat upper end coordinates with steel disc lower end, and axis hole coordinates with screw coaxial；The screw rod is by least one section of spiral shell
Rod piece is connected and fixed, and screw thread is equipped on each screw rod part, and the screw thread is using regular screw threads, single line screw thread, double teeth
One kind in screw thread, high low thread, MS bolt screw threads；The coiled hair is using cylinder hexagon or round countersunk head structure, the disk
Head upper surface is equipped with cross Pan Kou.
Further, the diameter DK ranging from 6.5-11.5mm of the coiled hair；The thickness K of coiled hair is 2.35-3.15mm.
Further, the screw rod and the entire length L of drilling tail are 9.5-120mm.
Further, the length of the drilling tail is 3-4.5mm.
Further, the spacing P of the screw thread is 1.3-1.8mm, and the diameter D of screw thread is 3.35-6.25mm.
Further, through-hole is additionally provided in the screw rod, the through-hole is connected to the chip removal mouth on coiled hair.
The invention also discloses a kind of above-mentioned preparation processes of countersunk head cross Self Drilling Screws, include the following steps：
（1）Blanking：Using metal wire rod as raw material, unidirectionally moved by moveable scissor, it is accurate by the volume of countersunk head cross Self Drilling Screws
Standby cylindrical blank；
（2）Cold-heading：Cylindrical blank is subjected to cold-heading molding using cold-heading equipment, is molded the coiled hair to form screw, spiral shell
Bar and drilling tail enclose groove in the junction cold-heading molding one of screw rod upper end and screw head；
（3）Threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is as follows
A, first time threading rubs shallow thread using threading equipment on the screw rod of screw；
B, second of threading carries out threading intensification using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading rubs final spiral shell using threading equipment on the basis of preceding threading twice on the screw rod of screw
Line；
（4）Countersunk head cross Self Drilling Screws is fixed on lathe, from drilling tail drill to screw, be made through-hole；
（5）Screw is heat-treated, concrete technology is：
A, it heats：Screw is heated to 750-760 DEG C, and keeps the temperature 3-4 hours；
B, cooling：After using the air-cooled cooling rate with 15-18 DEG C/s that screw acceleration is cooled to 350-360 DEG C, then it is air-cooled to
Room temperature；
C, primary tempering：After screw is heated to 650-670 DEG C of tempering 30-35min, waits for warm 30-45s, keep screw temperature uniform
Change, after being cooled to 300-310 DEG C later with the acceleration of the cooling rate of 10-15 DEG C/s, then is air-cooled to room temperature；
D, screw is heated to 800 DEG C, quenching 50-55min is carried out in quenching oil, then be air-cooled to room temperature；
E, double tempering：By quenched screw be heated to 650-660 DEG C tempering 30-35min, after be air-cooled to room temperature；
（6）Process support gasket：Circular gasket is processed according to the specification of countersunk head cross Self Drilling Screws, and the steel disc of strip is curved
Resilient support foot is made in song, and at circular gasket edge, at least three resilient support foot of uniform intervals welding, is made support pad；
（7）Pickling：By after tempering screw and support pad be placed in the hydrochloric acid of a concentration of 26-30% and impregnate 15-16min, clear water
It cleans, then is placed in a concentration of 3-4% phosphate solutions and impregnates 10-15min, finally cleaned with clear water；
（8）Plating：Pure aluminum coating is electroplated in screw outer surface；
（9）The first water-swellable waterstop is covered in the lower surface of support pad and is bonded with high temperature resistant moment glue,
One the second water-swellable waterstop of circle of installation and with high temperature resistant instant glue in one circle groove of screw rod upper end and the junction of screw head
Water is bonded, the flush with outer surface of the outer surface and screw rod of the second water-swellable waterstop；
（10）Support pad and screw are subjected to the countersunk head cross Self Drilling Screws that suit is made final；
（11）Cleaning, drying is simultaneously packed.
Advantageous effect：The Self Drilling Screws antirust ability of the present invention is strong；Corrosion fatigue life is up to complete effect；By by steel disc
Below coiled hair, collision mat upper end is bonded with steel disc lower end, axis hole lead screw coaxial cooperation, so that Self Drilling Screws is had enough
Intensity simultaneously, there is water-proof function, ensure its steady operation performance, improve service life.
Description of the drawings
Fig. 1 is the screw structural front view of the present invention；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is multi stage screw structural schematic diagram.
Specific implementation mode
Technical scheme of the present invention is described in further detail with reference to specific embodiment.
Such as Fig. 1 to a kind of novel countersunk head cross Self Drilling Screws shown in Fig. 3, including coiled hair 1, screw rod 2, drilling tail 3, steel disc 6
With collision mat 7, the one end of the screw rod 2 is fixedly connected with the coiled hair 1, and the other end and the drilling tail 3 of the screw rod 2 are fixed
Connection, 1 lower section of the coiled hair are equipped with steel disc 6, and steel disc 6 is equipped with through-hole, the through-hole and 2 coaxial cooperation of the screw rod, institute
It states collision mat 7 and is equipped with axis hole, 7 upper end of the collision mat coordinates with 6 lower end of steel disc, axis hole and 2 coaxial cooperation of screw rod；The spiral shell
Bar 2 is connected and fixed by least one section of screw rod part, and screw thread is equipped on each screw rod part, and the screw thread uses common spiral shell
One kind in line, single line screw thread, double pitch threads, high low thread, MS bolt screw threads；The coiled hair 1 uses cylinder hexagon or circle
Shape countersunk head structure, 1 upper surface of the coiled hair are equipped with cross disk mouth 4.
Further, the diameter DK ranging from 6.5-11.5mm of the coiled hair 1；The thickness K of coiled hair 1 is 2.35-3.15mm.
Further, the screw rod 2 and the entire length L of drilling tail 3 are 9.5-120mm.
Further, the length of the drilling tail 3 is 3-4.5mm.
Further, the spacing P of the screw thread 5 is 1.3-1.8mm, and the diameter D of screw thread 5 is 3.35-6.25mm.
Further, through-hole is additionally provided in the screw rod 2, the through-hole is connected to the chip removal mouth on coiled hair 1.Operating personnel
When using the drilling fastening of countersunk head cross Self Drilling Screws, external screw thread outside screw rod is playing the role of the same of drilling and chip removal
When, through-hole is also playing the role of drilling and chip removal so that drilling is more efficient when use, and chip removal is smooth, rapid operation.Through-hole
Upper end be connected to chip removal mouth, screw in drilling the clast that generates can the chip removal inside and outside screw rod, chip removal is more suitable
Freely, prevent clast from hindering drilling so that drilling is more laborsaving efficiently.
Further, one embodiment as shown in Figure 3, the screw rod 2 are connected and fixed by three sections of screw rod parts, and each
The diameter of screw rod part is mutually different, and the diameter of screw rod part is successively decreased successively by coiled hair to drilling tail.The purpose for the arrangement is that ten can
It drills to innermost end connector, improves the tautness between connector, fastening effect is good, and using effect is more preferable.
The invention also discloses a kind of above-mentioned preparation processes of novel countersunk head cross Self Drilling Screws, include the following steps：
（1）Blanking：Using metal wire rod as raw material, unidirectionally moved by moveable scissor, it is accurate by the volume of countersunk head cross Self Drilling Screws
Standby cylindrical blank；
（2）Cold-heading：Cylindrical blank is subjected to cold-heading molding using cold-heading equipment, is molded the coiled hair to form screw, spiral shell
Bar and drilling tail enclose groove in the junction cold-heading molding one of screw rod upper end and screw head；
（3）Threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is as follows
A, first time threading rubs shallow thread using threading equipment on the screw rod of screw；
B, second of threading carries out threading intensification using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading rubs final spiral shell using threading equipment on the basis of preceding threading twice on the screw rod of screw
Line；
（4）Countersunk head cross Self Drilling Screws is fixed on lathe, from drilling tail drill to screw, be made through-hole；
（5）Screw is heat-treated, concrete technology is：
A, it heats：Screw is heated to 750-760 DEG C, and keeps the temperature 3-4 hours；
B, cooling：After using the air-cooled cooling rate with 15-18 DEG C/s that screw acceleration is cooled to 350-360 DEG C, then it is air-cooled to
Room temperature；
C, primary tempering：After screw is heated to 650-670 DEG C of tempering 30-35min, waits for warm 30-45s, keep screw temperature uniform
Change, after being cooled to 300-310 DEG C later with the acceleration of the cooling rate of 10-15 DEG C/s, then is air-cooled to room temperature；
D, screw is heated to 800 DEG C, quenching 50-55min is carried out in quenching oil, then be air-cooled to room temperature；
E, double tempering：By quenched screw be heated to 650-660 DEG C tempering 30-35min, after be air-cooled to room temperature；
（6）Process support gasket：Circular gasket is processed according to the specification of countersunk head cross Self Drilling Screws, and the steel disc of strip is curved
Resilient support foot is made in song, and at circular gasket edge, at least three resilient support foot of uniform intervals welding, is made support pad；
（7）Pickling：By after tempering screw and support pad be placed in the hydrochloric acid of a concentration of 26-30% and impregnate 15-16min, clear water
It cleans, then is placed in a concentration of 3-4% phosphate solutions and impregnates 10-15min, finally cleaned with clear water；
（8）Plating：Pure aluminum coating is electroplated in screw outer surface；
（9）The first water-swellable waterstop is covered in the lower surface of support pad and is bonded with high temperature resistant moment glue,
One the second water-swellable waterstop of circle of installation and with high temperature resistant instant glue in one circle groove of screw rod upper end and the junction of screw head
Water is bonded, the flush with outer surface of the outer surface and screw rod of the second water-swellable waterstop；
（10）Support pad and screw are subjected to the countersunk head cross Self Drilling Screws that suit is made final；
（11）Cleaning, drying is simultaneously packed.
The Self Drilling Screws antirust ability of the present invention is strong；Corrosion fatigue life is up to complete effect；By the way that steel disc is mounted on disk
Head lower section, collision mat upper end are bonded with steel disc lower end, and axis hole lead screw coaxial cooperation makes Self Drilling Screws have enough intensity same
When, there is water-proof function, ensure its steady operation performance, improve service life.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the technical essence of the invention
To any simple modification, equivalent change and modification made by above example, in the range of still falling within technical solution of the present invention.
Claims (7)
1. a kind of novel countersunk head cross Self Drilling Screws, it is characterised in that：Including coiled hair（1）, screw rod（2）, drilling tail（3）, steel disc（6）
And collision mat（7）, the screw rod（2）One end and the coiled hair（1）It is fixedly connected, the screw rod（2）The other end with
Drilling tail（3）It is fixedly connected, the coiled hair（1）Lower section is equipped with steel disc（6）, steel disc（6）Be equipped with through-hole, the through-hole with it is described
Screw rod（2）Coaxial cooperation, the collision mat（7）It is equipped with axis hole, the collision mat（7）Upper end and steel disc（6）Lower end coordinates, axis
Hole and screw rod（2）Coaxial cooperation；The screw rod（2）It is connected and fixed by least one section of screw rod part, and is all provided on each screw rod part
There is screw thread, the screw thread is using one kind in regular screw threads, single line screw thread, double pitch threads, high low thread, MS bolt screw threads；Institute
State coiled hair（1）Using cylinder hexagon or round countersunk head structure, the coiled hair（1）Upper surface is equipped with cross Pan Kou（4）.
2. a kind of novel countersunk head cross Self Drilling Screws according to claim 1, it is characterised in that：The coiled hair（1）It is straight
Diameter DK ranging from 6.5-11.5mm；Coiled hair（1）Thickness K be 2.35-3.15mm.
3. a kind of novel countersunk head cross Self Drilling Screws according to claim 1, it is characterised in that：The screw rod（2）And brill
Tail（3）Entire length L be 9.5-120mm.
4. a kind of novel countersunk head cross Self Drilling Screws according to claim 1, it is characterised in that：The drilling tail（3）Length
Degree is 3-4.5mm.
5. a kind of novel countersunk head cross Self Drilling Screws according to claim 1, it is characterised in that：The screw thread（5）Between
It is 1.3-1.8mm, screw thread away from P（5）Diameter D be 3.35-6.25mm.
6. a kind of novel countersunk head cross Self Drilling Screws according to claim 1, it is characterised in that：The screw rod（2）It is interior to go back
Equipped with through-hole, the through-hole and coiled hair（1）On chip removal mouth connection.
7. a kind of preparation process of novel countersunk head cross Self Drilling Screws according to claim 1-6 any one, feature
It is：Include the following steps：
（1）Blanking：Using metal wire rod as raw material, unidirectionally moved by moveable scissor, it is accurate by the volume of countersunk head cross Self Drilling Screws
Standby cylindrical blank；
（2）Cold-heading：Cylindrical blank is subjected to cold-heading molding using cold-heading equipment, is molded the coiled hair to form screw, spiral shell
Bar and drilling tail enclose groove in the junction cold-heading molding one of screw rod upper end and screw head；
（3）Threading：Screw thread is rubbed on the screw rod of screw using threading equipment, is as follows
A, first time threading rubs shallow thread using threading equipment on the screw rod of screw；
B, second of threading carries out threading intensification using threading equipment on the shallow thread on the screw rod of screw；
C, third time threading rubs final spiral shell using threading equipment on the basis of preceding threading twice on the screw rod of screw
Line；
（4）Countersunk head cross Self Drilling Screws is fixed on lathe, from drilling tail drill to screw, be made through-hole；
（5）Screw is heat-treated, concrete technology is：
A, it heats：Screw is heated to 750-760 DEG C, and keeps the temperature 3-4 hours；
B, cooling：After using the air-cooled cooling rate with 15-18 DEG C/s that screw acceleration is cooled to 350-360 DEG C, then it is air-cooled to
Room temperature；
C, primary tempering：After screw is heated to 650-670 DEG C of tempering 30-35min, waits for warm 30-45s, keep screw temperature uniform
Change, after being cooled to 300-310 DEG C later with the acceleration of the cooling rate of 10-15 DEG C/s, then is air-cooled to room temperature；
D, screw is heated to 800 DEG C, quenching 50-55min is carried out in quenching oil, then be air-cooled to room temperature；
E, double tempering：By quenched screw be heated to 650-660 DEG C tempering 30-35min, after be air-cooled to room temperature；
（6）Process support gasket：Circular gasket is processed according to the specification of countersunk head cross Self Drilling Screws, and the steel disc of strip is curved
Resilient support foot is made in song, and at circular gasket edge, at least three resilient support foot of uniform intervals welding, is made support pad；
（7）Pickling：By after tempering screw and support pad be placed in the hydrochloric acid of a concentration of 26-30% and impregnate 15-16min, clear water
It cleans, then is placed in a concentration of 3-4% phosphate solutions and impregnates 10-15min, finally cleaned with clear water；
（8）Plating：Pure aluminum coating is electroplated in screw outer surface；
（9）The first water-swellable waterstop is covered in the lower surface of support pad and is bonded with high temperature resistant moment glue,
One the second water-swellable waterstop of circle of installation and with high temperature resistant instant glue in one circle groove of screw rod upper end and the junction of screw head
Water is bonded, the flush with outer surface of the outer surface and screw rod of the second water-swellable waterstop；
（10）Support pad and screw are subjected to the countersunk head cross Self Drilling Screws that suit is made final；
（11）Cleaning, drying is simultaneously packed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181658.5A CN108278262A (en) | 2018-03-06 | 2018-03-06 | A kind of novel countersunk head cross Self Drilling Screws and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181658.5A CN108278262A (en) | 2018-03-06 | 2018-03-06 | A kind of novel countersunk head cross Self Drilling Screws and its preparation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108278262A true CN108278262A (en) | 2018-07-13 |
Family
ID=62809287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810181658.5A Pending CN108278262A (en) | 2018-03-06 | 2018-03-06 | A kind of novel countersunk head cross Self Drilling Screws and its preparation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108278262A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101501350A (en) * | 2006-04-17 | 2009-08-05 | 阿久曼特知识产权有限公司 | High performance thread forming screw |
| CN103849746A (en) * | 2012-12-07 | 2014-06-11 | 中原特钢股份有限公司 | Thermal treatment process for 40CrNiMoA core rod and 40CrNiMoA core rod obtained through process |
| CN104625575A (en) * | 2013-11-06 | 2015-05-20 | 西安福斯特动力科技有限公司 | Machining technology of integrally-formed multi-thread bolt |
| CN204828206U (en) * | 2015-08-04 | 2015-12-02 | 海盐新盛达标准件有限公司 | Steel construction is with boring tail screw |
| CN106931019A (en) * | 2017-04-07 | 2017-07-07 | 江苏固德建筑机械有限公司 | A kind of coiled hair cross Self Drilling Screws and its processing technology |
-
2018
- 2018-03-06 CN CN201810181658.5A patent/CN108278262A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101501350A (en) * | 2006-04-17 | 2009-08-05 | 阿久曼特知识产权有限公司 | High performance thread forming screw |
| CN103849746A (en) * | 2012-12-07 | 2014-06-11 | 中原特钢股份有限公司 | Thermal treatment process for 40CrNiMoA core rod and 40CrNiMoA core rod obtained through process |
| CN104625575A (en) * | 2013-11-06 | 2015-05-20 | 西安福斯特动力科技有限公司 | Machining technology of integrally-formed multi-thread bolt |
| CN204828206U (en) * | 2015-08-04 | 2015-12-02 | 海盐新盛达标准件有限公司 | Steel construction is with boring tail screw |
| CN106931019A (en) * | 2017-04-07 | 2017-07-07 | 江苏固德建筑机械有限公司 | A kind of coiled hair cross Self Drilling Screws and its processing technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106931019A (en) | A kind of coiled hair cross Self Drilling Screws and its processing technology | |
| CN108561395A (en) | A kind of novel round-head washer cross Self Drilling Screws and its preparation process | |
| US10221880B2 (en) | Drilling screw | |
| CN108488182A (en) | A kind of coiled hair cross Self Drilling Screws and its preparation process improving degree of being completely embedded | |
| CN108278262A (en) | A kind of novel countersunk head cross Self Drilling Screws and its preparation process | |
| CN108180205A (en) | A kind of coiled hair cross STAINLESS STEEL SELF DRILLING SCREWS and its preparation process | |
| CN108561396A (en) | A kind of countersunk head cross Self Drilling Screws and its preparation process | |
| CN206682119U (en) | A kind of self-tapping screw | |
| CN108457957A (en) | A kind of countersunk head cross STAINLESS STEEL SELF DRILLING SCREWS and its preparation process | |
| CN108223534A (en) | A kind of round end washer cross Self Drilling Screws and its preparation process | |
| CN208311220U (en) | A kind of coiled hair cross Self Drilling Screws improving degree of being completely embedded | |
| CN108252999A (en) | A kind of coiled hair cross Self Drilling Screws and its preparation process | |
| CN108252998A (en) | A kind of round end washer cross STAINLESS STEEL SELF DRILLING SCREWS and its preparation process | |
| CN108180206A (en) | A kind of hexagonal washer STAINLESS STEEL SELF DRILLING SCREWS and its preparation process | |
| CN208040875U (en) | A kind of countersunk head cross Self Drilling Screws | |
| CN207961212U (en) | A kind of novel round-head washer cross Self Drilling Screws | |
| CN215409656U (en) | High-strength super-corrosion-resistant self-tapping screw | |
| CN113389798B (en) | Special novel locknut subassembly of railway | |
| CN206694381U (en) | A kind of countersunk head cross Self Drilling Screws | |
| CN210013916U (en) | Antirust and antiskid self-tapping screw | |
| CN210135156U (en) | One-way friction self-tapping self-locking screw | |
| CN211449328U (en) | Cross-slot pan head bolt | |
| CN115573989A (en) | Coiled head cross self-drilling screw made of stainless steel material and processing technology thereof | |
| CN214788491U (en) | High-strength hexagon nut | |
| CN201428713Y (en) | Anti-falling quickly-screwed type screw fastener |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180713 |
|
| RJ01 | Rejection of invention patent application after publication |