CN108223534A - A kind of round end washer cross Self Drilling Screws and its preparation process - Google Patents
A kind of round end washer cross Self Drilling Screws and its preparation process Download PDFInfo
- Publication number
- CN108223534A CN108223534A CN201810181650.9A CN201810181650A CN108223534A CN 108223534 A CN108223534 A CN 108223534A CN 201810181650 A CN201810181650 A CN 201810181650A CN 108223534 A CN108223534 A CN 108223534A
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- Prior art keywords
- screw
- screw rod
- coiled hair
- drilling screws
- self drilling
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- 238000005553 drilling Methods 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 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
- 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
- 238000005452 bending Methods 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 5
- 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
- 230000007812 deficiency Effects 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
- 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
-
- 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
- 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
- F16B33/02—Shape of thread; Special thread-forms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a kind of round end washer cross Self Drilling Screws and its preparation processes, the round end washer 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 round washer 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 is 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 round end washer cross Self Drilling Screws and its preparation 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 to attaching nut use, is tapping screw, the tail portion of self-tapping screw is in yet
Drilling tail or fine stern shape, without elder generation on workpiece grooved bit silk, can be 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, 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, is such as used to calcium silicate board with microporous, plasterboard and various planks being 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.
Existing Self Drilling Screws also there is it is certain the problem of, it is fashionable in drill screw drill, Self Drilling Screws locking when, hold
It easily skids, and time-consuming and laborious；The objects such as existing Self Drilling Screws poor sealing, external water, dust are easily accessible screw connection
Portion reduces bonding strength and connection lifetime.Existing Self Drilling Screws non-refractory easily aoxidizes, is perishable, not anti-embroidery.
Invention content
Goal of the invention：The purpose of the present invention is to solve deficiencies of the prior art, provide a kind of round end washer 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 round end washer 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,
For the coiled hair using round washer structure, the coiled hair upper surface is equipped with cross Pan Kou, and steel is equipped with below the coiled hair
Piece, steel disc are equipped with through-hole, and the through-hole coordinates with the screw coaxial, and the collision mat is equipped with axis hole, the collision mat
Upper end coordinates with steel disc lower end, and axis hole coordinates with screw coaxial, and the screw rod is equipped with the screw thread equidistantly arranged, the spiral shell
Line is using one kind in regular screw threads, single line screw thread, double pitch threads, high low thread, MS bolt screw threads.
Further, the diameter A ranging from 9.7-11.1mm of the coiled hair；The thickness H of coiled hair is 1.9-2.5mm.
Further, the screw rod and the entire length L of drilling tail are 13-76mm.
Further, the length of the drilling tail is 3-4.5mm.
Further, the spacing of the screw thread is 1.3-1.8mm, and the diameter D of screw thread is 3.7-4.8mm.
Further, through-hole is additionally provided in the screw rod, the through-hole is connected with the chip removal mouth on coiled hair.
The invention also discloses a kind of above-mentioned preparation processes of round end washer cross Self Drilling Screws, include the following steps：
（1）Blanking：It using metal wire rod as raw material, is unidirectionally moved by moveable scissor, by the body of round end washer cross Self Drilling Screws
Product prepares 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 uses on screw rod of the threading equipment in screw on the basis of preceding threading twice and rubs final spiral shell
Line；
（4）Round end washer cross Self Drilling Screws is fixed on lathe, at the drilling tail drill to screw, be made logical
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, it cools down：After using the air-cooled cooldown 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, treats warm 30-45s, make screw temperature uniform
Change, after being cooled to 300-310 DEG C later with the acceleration of the cooldown rate of 10-15 DEG C/s, then be 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, and by the steel of strip according to the specification of round end washer cross Self Drilling Screws
Resilient support foot is made in piece bending, and at circular gasket edge, at least three resilient support foot of uniform intervals welding, is made supporting pad
Piece；
（7）Pickling：Screw after tempering and support pad are 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 outer surface of the second water-swellable waterstop and the flush with outer surface of screw rod；
（10）Support pad and screw are subjected to the obtained final round end washer cross Self Drilling Screws of suit；
（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, has Self Drilling Screws 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.
Specific embodiment
Technical scheme of the present invention is described in further detail with reference to specific embodiment.
A kind of round end washer cross Self Drilling Screws as depicted in figs. 1 and 2, 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, for the coiled hair 1 using round washer, 1 upper surface of coiled hair is equipped with cross disk mouth 4, and 1 lower section of coiled hair is installed
There is steel disc 6, steel disc 6 is equipped with through-hole, the through-hole and 2 coaxial cooperation of screw rod, and the collision mat 7 is equipped with axis hole, institute
It states 7 upper end of collision mat with 6 lower end of steel disc to coordinate, axis hole and 2 coaxial cooperation of screw rod, the screw rod 2 are equipped with what is equidistantly arranged
Screw thread 5, 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.
Further, the diameter A ranging from 9.7-11.1mm of the coiled hair 1；The thickness H of coiled hair 1 is 1.9-2.5mm.
Further, the screw rod 2 and the entire length L of drilling tail 3 are 13-76mm.
Further, the length of the drilling tail 3 is 3-4.5mm.
Further, the spacing of the screw thread 5 is 1.3-1.8mm, and the diameter D of screw thread 5 is 3.7-4.8mm.
Further, through-hole is additionally provided in the screw rod 2, the through-hole is connected with the chip removal mouth on coiled hair 1.Operating personnel
When using the drilling fastening of round end washer cross Self Drilling Screws, external screw thread outside screw rod is playing the role of drilling and chip removal
Meanwhile through-hole is also playing the role of drilling and chip removal so that drilling is more efficient during use, and chip removal is smooth, rapid operation.It is logical
The upper end in hole is connected with chip removal mouth, screw in drilling the clast that generates can the chip removal inside and outside screw rod, chip removal is more
It is smooth, prevent clast from hindering drilling so that drilling more Labor-saving high-efficiency.
The invention also discloses a kind of above-mentioned preparation processes of round end washer cross Self Drilling Screws, include the following steps：
（1）Blanking：It using metal wire rod as raw material, is unidirectionally moved by moveable scissor, by the body of round end washer cross Self Drilling Screws
Product prepares 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 uses on screw rod of the threading equipment in screw on the basis of preceding threading twice and rubs final spiral shell
Line；
（4）Round end washer cross Self Drilling Screws is fixed on lathe, at the drilling tail drill to screw, be made logical
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, it cools down：After using the air-cooled cooldown 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, treats warm 30-45s, make screw temperature uniform
Change, after being cooled to 300-310 DEG C later with the acceleration of the cooldown rate of 10-15 DEG C/s, then be 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, and by the steel of strip according to the specification of round end washer cross Self Drilling Screws
Resilient support foot is made in piece bending, and at circular gasket edge, at least three resilient support foot of uniform intervals welding, is made supporting pad
Piece；
（7）Pickling：Screw after tempering and support pad are 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 outer surface of the second water-swellable waterstop and the flush with outer surface of screw rod；
（10）Support pad and screw are subjected to the obtained final round end washer cross Self Drilling Screws of suit；
（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, axis hole lead screw coaxial cooperation, make Self Drilling Screws same with enough intensity
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, not make limitation in any form to the present invention, though
So the present invention is disclosed above with preferred embodiment, however is not limited to the present 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, technical spirit according to the present invention
To any simple modification, equivalent change and modification that above example is made, in the range of still falling within technical solution of the present invention.
Claims (7)
1. a kind of round end washer 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）Using round washer structure, the coiled hair（1）Upper surface is equipped with cross Pan Kou
（4）, the coiled hair（1）Lower section is equipped with steel disc（6）, steel disc（6）It is equipped with through-hole, the through-hole and the screw rod（2）Coaxially
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 equipped with the screw thread equidistantly arranged（5）, the screw thread is using regular screw threads, single line spiral shell
One kind in line, double pitch threads, high low thread, MS bolt screw threads.
2. a kind of round end washer cross Self Drilling Screws according to claim 1, it is characterised in that：The coiled hair（1）It is straight
Diameter A ranging from 9.7-11.1mm；Coiled hair（1）Thickness H be 1.9-2.5mm.
3. a kind of round end washer 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 13-76mm.
4. a kind of round end washer cross Self Drilling Screws according to claim 1, it is characterised in that：The drilling tail（3）Length
It spends for 3-4.5mm.
5. a kind of round end washer cross Self Drilling Screws according to claim 1, it is characterised in that：The screw thread（5）Between
Away from for 1.3-1.8mm, screw thread（5）Diameter D be 3.7-4.8mm.
6. a kind of round end washer 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 round end washer cross Self Drilling Screws according to claim 1-6 any one, feature
It is：Include the following steps：
（1）Blanking：It using metal wire rod as raw material, is unidirectionally moved by moveable scissor, by the body of round end washer cross Self Drilling Screws
Product prepares 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 uses on screw rod of the threading equipment in screw on the basis of preceding threading twice and rubs final spiral shell
Line；
（4）Round end washer cross Self Drilling Screws is fixed on lathe, at the drilling tail drill to screw, be made logical
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, it cools down：After using the air-cooled cooldown 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, treats warm 30-45s, make screw temperature uniform
Change, after being cooled to 300-310 DEG C later with the acceleration of the cooldown rate of 10-15 DEG C/s, then be 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, and by the steel of strip according to the specification of round end washer cross Self Drilling Screws
Resilient support foot is made in piece bending, and at circular gasket edge, at least three resilient support foot of uniform intervals welding, is made supporting pad
Piece；
（7）Pickling：Screw after tempering and support pad are 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 outer surface of the second water-swellable waterstop and the flush with outer surface of screw rod；
（10）Support pad and screw are subjected to the obtained final round end washer cross Self Drilling Screws of suit；
（11）Cleaning, drying is simultaneously packed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181650.9A CN108223534A (en) | 2018-03-06 | 2018-03-06 | A kind of round end washer cross Self Drilling Screws and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810181650.9A CN108223534A (en) | 2018-03-06 | 2018-03-06 | A kind of round end washer cross Self Drilling Screws and its preparation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108223534A true CN108223534A (en) | 2018-06-29 |
Family
ID=62666793
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810181650.9A Pending CN108223534A (en) | 2018-03-06 | 2018-03-06 | A kind of round end washer cross Self Drilling Screws and its preparation process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| 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 |
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