CN110513378A - A kind of helical coil and preparation method thereof - Google Patents
A kind of helical coil and preparation method thereof Download PDFInfo
- Publication number
- CN110513378A CN110513378A CN201910875234.3A CN201910875234A CN110513378A CN 110513378 A CN110513378 A CN 110513378A CN 201910875234 A CN201910875234 A CN 201910875234A CN 110513378 A CN110513378 A CN 110513378A
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- helical coil
- stainless steel
- steel wire
- pitch
- coil
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- 238000002360 preparation method Methods 0.000 title abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 19
- 229910001566 austenite Inorganic materials 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000005480 shot peening Methods 0.000 claims description 8
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 7
- 238000005422 blasting Methods 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 7
- 238000005728 strengthening Methods 0.000 claims description 7
- 238000002161 passivation Methods 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009713 electroplating Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004532 chromating Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F3/00—Coiling wire into particular forms
- B21F3/02—Coiling wire into particular forms helically
- B21F3/04—Coiling wire into particular forms helically externally on a mandrel or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
-
- 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
-
- 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
- F16B33/04—Shape of thread; Special thread-forms in view of tensile load
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Wire Processing (AREA)
Abstract
The invention discloses a kind of helical coil and preparation method thereof, the cable of the helical coil starting point is parallel to the cross section of the helical coil ontology；Cross section of the cable of the helical coil clearing end perpendicular to the helical coil ontology.The present invention can reduce the fatigue failure of axis class screw thread and screw thread transition region under alternating bending stress effect, can make screw thread axial force mean allocation, effectively extend the service life of Axle Parts.
Description
Technical field
The present invention relates to a kind of main shaft connection screw thread technical field, especially a kind of helical coil and preparation method thereof.
Background technique
Threaded connection be it is a kind of it is widely used removably is fixedly connected, have structure is simple, connection reliably, assembly and disassembly side
Just the advantages that.In the hydraulic press transmission system of high frequency task, the fatigue fracture of pull rod screw connection place is the failure of pull rod main shaft
The main reason for.And the weakness of most stress main shafts or stress concentration portion position focus mostly at main shaft start screw threads, in master
In axis loading process, it is easy to appear fatigue notch, leads to thread damage or fracture.And most of mainshaft nut is sometimes for frequent
Disassembly, different degrees of damage can be also caused to pull rod screw and nut.
How on main shaft connection screw thread ontology setting subtracts stress structure to reduce the stress level at connection screw thread position, at
For for those skilled in the art's urgent problem to be solved.
Summary of the invention
The technical problem to be solved by the present invention is in view of the shortcomings of the prior art, provide a kind of helical coil and its production
Method makes screw thread axial force mean allocation, extends the service life of Axle Parts.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of helical coil, the threaded line enclose
The cable at beginning is parallel to the cross section of the helical coil ontology；The cable of the helical coil clearing end is perpendicular to the helical coil
The cross section of ontology.
The ontology is wound on thread spindle.
The cable of the starting point and described thread spindle one end face contact are simultaneously fixedly connected；The cable of the clearing end and institute
It states face contact on the outside of the thread spindle other end and is fixedly connected, and the cable of the clearing end is parallel to the thread spindle axis.
The cable use diameter forOrAustenite stainless steel wire rod.
The diameter tolerance of the austenite stainless steel wire rod is ± 0.01mm.
The present invention also provides a kind of production methods of above-mentioned helical coil comprising following steps:
1) austenite stainless steel wire rod is heated to 1080 DEG C~1120 DEG C, be then rapidly cooled to room temperature；
2) Shot Blasting is carried out to through step 1) treated austenite stainless steel wire rod；
3) helical coil coil device is clamped at numerical control lathe collet, the austenite stainless steel wire rod after Shot Blasting rises
Beginning is fixed in coil device starting clamping position, turns numerical control lathe to low or first gear, at some tension (500~700N)
Wound clockwise is carried out along coil device pitch of the laps station；
4) austenite stainless steel wire rod is cut, is adjusted according to pitch of the laps tightness, will terminate connector be positioned at around
Coil apparatus terminates in clamping position；
5) helical coil after tool locating is put into togerther vacuum heat treatment furnace with coil device and carries out the blunt place of low temperature burning
Reason (is heated to 300 DEG C~350 DEG C, keep after 2h~3h with furnace Slow cooling).
After step 5), further includes:
6) Shot Blasting will be carried out using micro- glass ball is sprayed, to remove screw thread after setting treated helical coil disassembly
Coil surface oxide skin；
7) helical coil after shot peening strengthening is subjected to plating mould processing.
The coil device pitch of the laps station uses round thread form, shading radius and austenitic stainless steel wire radius one
It causes, shading spacing=austenitic stainless steel gauge or diameter of wire+1.25mm.
In step 6), cutting tack processing also is carried out to the helical coil both ends, then makes starting point 10mm length horizontal
To perpendicular to pitch of the laps direction, clearing end 10mm is longitudinally perpendicular in pitch of the laps direction.
In step 7), the helical coil surface after shot peening strengthening carries out color zinc Passivation Treatment, and the plating of electroplating surface
Layer is with a thickness of 15-20um.
Compared with prior art, the advantageous effect of present invention is that:
1, the present invention can reduce the fatigue failure of axis class screw thread and screw thread transition region under alternating bending stress effect, can
Make screw thread axial force mean allocation, effectively extends the service life of Axle Parts；
2, method manufacture craft science of the invention, excellent product quality rate obtained are high.
Detailed description of the invention
Fig. 1 is helical coil main view of the present invention；
Fig. 2 is helical coil perspective view one of the present invention；
Fig. 3 is helical coil perspective view two of the present invention；
Fig. 4 is that helical coil of the present invention is wound in the main view on thread spindle；
Fig. 5 is that helical coil of the present invention is wound in the rearview on thread spindle；
Fig. 6 is that helical coil of the present invention is wound in the perspective view on thread spindle；
Fig. 7 is the left view of Fig. 5；
Fig. 8 is helical coil pitch of the laps main view of the present invention；
Fig. 9 is the left view of Fig. 8；
Figure 10 is helical coil pitch of the laps perspective view of the present invention；
Figure 11 is
In figure: 1, helical coil originates angle of hanging down；2, helical coil ontology；3, helical coil terminates the straight angle；4, clamping is originated
Position；5, clamping position is terminated；6, clamping station；7, pitch of the laps station；8, austenite stainless steel wire rod.
Specific embodiment
As shown in FIG. 1 to 3, the present invention includes that helical coil originates angle 1 of hanging down, helical coil ontology 2, helical coil termination
The straight angle 3.
Helical coil originates angle of hanging down laterally perpendicular to pitch of the laps direction, plays helical coil and originates fixed function；
It is longitudinally perpendicular in pitch of the laps direction, helical coil termination fixed function that helical coil terminates the straight angle；
The pitch of the laps state of a constant pitch (pitch P=D+1.25mm, D are helical coil diameter) is presented in helical coil ontology,
It interior can be threaded to match (see Fig. 4~Fig. 7) in conjunction with round thread nut on axis class round thread, reduce axis class screw thread and screw thread mistake
Fatigue failure of the area under alternating bending stress effect is crossed, screw thread axial force mean allocation can be made, effectively extend Axle Parts
Service life.
The production method of spiral winding of the present invention the following steps are included:
Step 1: selection, general selection diameter are(or) austenite stainless steel wire rod is as material, material
Expect diameter tolerance control in ± 0.01mm；
Step 2: solution treatment, is heated to 1080~1120 DEG C for austenite stainless steel wire rod, is then quickly cooled to room
Temperature dissolves various phases in alloy sufficiently, Intensive intervention body, and mentions wire rod high tenacity and etch resistant properties, eliminates stress and softening,
To continue to process or to form.
Step 3: shot peening strengthening I, carries out Shot Blasting to STAINLESS STEEL WIRE using micro- glass ball is sprayed, to remove Surface Oxygen
Change skin, improve fatigue strength, wearability and roughness.
Step 4: numerical control pitch of the laps, by helical coil coil device clamping position at numerical control lathe collet, austenitic stainless steel
Wire rod starting point is fixed in coil device starting clamping position 4, turns numerical control lathe to low or first gear, in some tension along
Wound clockwise is carried out in coil device pitch of the laps station.
Step 5: tool locating, helical coil numerical control pitch of the laps is completed, and austenite stainless steel wire rod is cut, according to pitch of the laps
Tightness is adjusted, and will terminate connector and be positioned in coil device termination clamping position 5.
Step 6: setting is handled, the helical coil after tool locating is put into togerther vacuum heat treatment furnace with coil device
It carries out low temperature and burns blunt processing, helical coil is made to reach dimensionally stable, hardness and the consistent purpose of rustless property.
Step 7: shot peening strengthening II, ball blast will be carried out using micro- glass ball is sprayed after setting treated helical coil disassembly
Processing, to remove surface scale, improve fatigue strength, wearability and roughness.
Step 8: coating film treatment, carries out plating die treatment for the helical coil after shot peening strengthening.
Further, austenitic stainless steel is the high abrasion austenitic stainless steel containing chromium and nickel element.
Further, helical coil coil device pitch of the laps station 7 uses round thread form, round thread shading radius and Ovshinsky
8 radius of body STAINLESS STEEL WIRE is consistent, and shading spacing takes austenitic stainless steel gauge or diameter of wire D+1.25mm, round thread bottom diameter D1According to
Pitch of the laps shrinking percentage value is D1=(0.7~0.9) DSpiral shell,DSpiral shellFor round thread internal diameter.
Further, after shot peening, helical coil both ends of the surface are ground, carry out 90 ° of vertical processing；
Further, plating mould is 15-20um using color zinc Passivation Treatment, the plating thickness of electroplating surface.Iris is blunt
Change film than white chromating film thickness, and when iridescent passivation film surface is scratched, the passivation in humid air, near scratch site
There is Cr VI in film carries out " being passivated again " effect to scratch site, has repaired damage, passivating film is made to restore complete.
Figure 11 is axial workpiece, matches schematic diagram between helical coil, nut, and threaded line encloses middle transition work
With, it is possible to reduce the fatigue failure of axis class screw thread and screw thread transition region under alternating bending stress effect can make screw thread axial force
Mean allocation effectively extends the service life of Axle Parts and nut.
Claims (10)
1. a kind of helical coil, which is characterized in that the cable of the helical coil starting point is parallel to the cross of the helical coil ontology
Section；Cross section of the cable of the helical coil clearing end perpendicular to the helical coil ontology；The starting point of the helical coil, sheet
Body, termination end surfaces are respectively provided with electroplated layer.
2. helical coil according to claim 1, which is characterized in that the ontology is wound on thread spindle.
3. helical coil according to claim 2, which is characterized in that the cable of the starting point and described thread spindle one end
Face contact is simultaneously fixedly connected；The cable of the clearing end and face contact on the outside of the thread spindle other end are simultaneously fixedly connected, and should
The cable of clearing end is parallel to the thread spindle axis.
4. helical coil described according to claim 1~one of 3, which is characterized in that the cable use diameter forOrAustenite stainless steel wire rod.
5. helical coil according to claim 4, which is characterized in that the diameter tolerance of the austenite stainless steel wire rod is
±0.01mm。
6. the production method of helical coil described in a kind of one of Claims 1 to 5, which comprises the following steps:
1) austenite stainless steel wire rod is heated to 1080 DEG C~1120 DEG C, be then rapidly cooled to room temperature；
2) Shot Blasting is carried out to through step 1) treated austenite stainless steel wire rod；
3) helical coil coil device is clamped at numerical control lathe collet, the austenite stainless steel wire rod starting point after Shot Blasting
It is fixed in coil device starting clamping position, turns numerical control lathe to low or first gear, along coil device pitch of the laps under 500~700N tension
Station carries out wound clockwise；
4) austenite stainless steel wire rod is cut, is adjusted according to pitch of the laps tightness, connector will be terminated and be positioned at pitch of the laps dress
It sets and terminates in clamping position；
5) helical coil after tool locating is put into togerther vacuum heat treatment furnace with coil device and carries out the blunt processing of low temperature burning.
7. the production method of helical coil according to claim 6, which is characterized in that after step 5), further includes:
6) Shot Blasting will be carried out using micro- glass ball is sprayed, to remove helical coil after setting treated helical coil disassembly
Surface scale；
7) helical coil after shot peening strengthening is subjected to plating mould processing.
8. the production method of helical coil according to claim 6 or 7, which is characterized in that the coil device pitch of the laps work
Position uses round thread form, and shading radius is consistent with austenitic stainless steel wire radius, shading spacing=austenite stainless steel wire
Material diameter+1.25mm.
9. the production method of helical coil according to claim 7, which is characterized in that in step 6), also to the screw thread
Coil both ends carry out cutting tack processing, then make starting point 10mm length laterally perpendicular to pitch of the laps direction, clearing end 10mm is vertical
To perpendicular to pitch of the laps direction.
10. the production method of helical coil according to claim 7, which is characterized in that in step 7), after shot peening strengthening
Helical coil surface carry out color zinc Passivation Treatment, and the plating thickness of electroplating surface is 15-20um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875234.3A CN110513378A (en) | 2019-09-17 | 2019-09-17 | A kind of helical coil and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910875234.3A CN110513378A (en) | 2019-09-17 | 2019-09-17 | A kind of helical coil and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110513378A true CN110513378A (en) | 2019-11-29 |
Family
ID=68632624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910875234.3A Pending CN110513378A (en) | 2019-09-17 | 2019-09-17 | A kind of helical coil and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513378A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2363789A (en) * | 1943-12-16 | 1944-11-28 | Aircraft Screw Prod Co | Wire coil insert |
| GB857058A (en) * | 1958-12-03 | 1960-12-29 | Heli Coil Corp | A method and means for producing self-locking screw thread forming wire coils |
| US4309135A (en) * | 1980-07-18 | 1982-01-05 | Keystone Consolidated Industries, Inc. | Concrete anchor |
| US5006023A (en) * | 1990-04-24 | 1991-04-09 | Stanley Kaplan | Strip-out preventing anchoring assembly and method of anchoring |
| US20010014263A1 (en) * | 2000-02-04 | 2001-08-16 | William Giannakakos | Anti-galling nut assembly |
| JP2002333003A (en) * | 2001-05-10 | 2002-11-22 | Bisuteeji:Kk | Coil winding screw shaft connection fixture |
| US20080008557A1 (en) * | 2006-07-10 | 2008-01-10 | Henry R. Bucciero | Threaded fastener members formed from spiral wound wire |
| US20130276287A1 (en) * | 2010-11-08 | 2013-10-24 | Böllhoff Verbindungstechnik GmbH | Wire thread insert with redressable mounting tang as well as its manufacturing and installation |
| CN208831464U (en) * | 2018-08-31 | 2019-05-07 | 深圳市三琦工业科技有限公司 | Scratch resistant recoil inserts |
| CN211715507U (en) * | 2019-09-17 | 2020-10-20 | 湖南科技大学 | Thread coil |
-
2019
- 2019-09-17 CN CN201910875234.3A patent/CN110513378A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2363789A (en) * | 1943-12-16 | 1944-11-28 | Aircraft Screw Prod Co | Wire coil insert |
| GB857058A (en) * | 1958-12-03 | 1960-12-29 | Heli Coil Corp | A method and means for producing self-locking screw thread forming wire coils |
| US4309135A (en) * | 1980-07-18 | 1982-01-05 | Keystone Consolidated Industries, Inc. | Concrete anchor |
| US5006023A (en) * | 1990-04-24 | 1991-04-09 | Stanley Kaplan | Strip-out preventing anchoring assembly and method of anchoring |
| US20010014263A1 (en) * | 2000-02-04 | 2001-08-16 | William Giannakakos | Anti-galling nut assembly |
| JP2002333003A (en) * | 2001-05-10 | 2002-11-22 | Bisuteeji:Kk | Coil winding screw shaft connection fixture |
| US20080008557A1 (en) * | 2006-07-10 | 2008-01-10 | Henry R. Bucciero | Threaded fastener members formed from spiral wound wire |
| US20130276287A1 (en) * | 2010-11-08 | 2013-10-24 | Böllhoff Verbindungstechnik GmbH | Wire thread insert with redressable mounting tang as well as its manufacturing and installation |
| CN208831464U (en) * | 2018-08-31 | 2019-05-07 | 深圳市三琦工业科技有限公司 | Scratch resistant recoil inserts |
| CN211715507U (en) * | 2019-09-17 | 2020-10-20 | 湖南科技大学 | Thread coil |
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