US10385903B2 - Metric self-tapping locking screw and the manufacturing method thereof - Google Patents
Metric self-tapping locking screw and the manufacturing method thereof Download PDFInfo
- Publication number
- US10385903B2 US10385903B2 US15/587,436 US201715587436A US10385903B2 US 10385903 B2 US10385903 B2 US 10385903B2 US 201715587436 A US201715587436 A US 201715587436A US 10385903 B2 US10385903 B2 US 10385903B2
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- Prior art keywords
- thread
- screw
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- line
- tapping
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- Expired - Fee Related, expires
Links
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 69
- 238000004519 manufacturing process Methods 0.000 title description 14
- 230000007704 transition Effects 0.000 claims description 9
- 230000003068 static effect Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001339 C alloy Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000641 cold extrusion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- 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
- F16B25/106—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a self-piercing screw-point, i.e. without removing 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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/30—Locking exclusively by special shape of the screw-thread
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F5/00—Upsetting wire or pressing operations affecting the wire cross-section
- B21F5/005—Upsetting wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/025—Rolling locking screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/027—Rolling of self-tapping screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
-
- 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
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0015—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a soft organic material, e.g. wood or plastic
-
- 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
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
-
- 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
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
-
- 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
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0047—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/02—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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/002—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws onto which threads are cut during screwing
-
- 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
Definitions
- the Invention relates to a screw and its manufacturing method, and particularly to a metric self-tapping locking screw and the manufacturing method thereof.
- the Invention is to provide a metric self-tapping locking screw and the manufacturing method appropriate for fastening applications of base materials such as high-strength cold-rolled steel, aluminum alloy castings and plastic, and application of the fastening technology with lower tapping moment and higher static loosing moment, so that the installed parts to be fastened have higher axial clamping force, which solves the attenuation problem of axial clamping force and static moment of fastened parts.
- a metric self-tapping locking screw comprises a screw head, a screw rod, a thread locking body, a self-tapping tip and a screw thread; the screw head is connected to the thread locking body with the screw rod; the thread locking body and the self-tapping tip are provided with the screw thread on the surface; the self-tapping tip is arranged at the root of the thread locking body; the screw thread adopts the basic structure of the standard ordinary triangular thread; a flank angle of the screw thread back to the fastened surface is 15-20° and another flank angle of the screw thread facing the fastened surface is 30°; a crest of said screw thread is in a plane transition structure or a natural circular arc transition structure.
- the screw thread is divided into eight equal parts by eight mean lines;
- the eight mean lines include one-eighth line, two-eighth line, three-eighth line, four-eighth line, five-eighth line, six-eighth line, seven-eighth line and eight-eighth line;
- the intersection of the four-eighth line and the crest is a first crossing point;
- the intersection of the two-eighth line and the crest side back to the fastened surface is a second crossing point;
- a tangency arc between the first crossing point and the second crossing point is a rounded root of thread.
- the two-eighth line and the screw thread intersect at a third tangency point; the three-eighth line and the screw thread intersect at a forth crossing point; a line connected the third tangency point and the forth crossing point forms a thread root-diameter angle with the two-eighth line; the thread root-diameter angle is 20°.
- the rounded root of thread constitutes the asymmetry root-diameter structure of the metric self-tapping locking screw together with the thread roof-diameter angle.
- the horizontal cross-section of said self-tapping tip is in a triangular circular arc transition structure and forms an angle of 8-15° with the plane of the thread locking body; the crests of the self-tapping tip transit to the thread locking body from small to large in a cone way and the screw threads on the thread locking body gradually diminish to said self-tapping tip in compliance with the crest shape.
- the length of the screw thread on the self-tapping tip is equal to or less than the nominal diameter of the screw thread on the thread locking body.
- the Invention also provides a manufacturing method of the metric self-tapping locking screw, comprising the following steps:
- the circular section diameter of the wire coil for cold heading is equal or greater than the diameter of the screw head
- the screw head, the screw rod, the thread locking body and the self-tapping tip are formed on the surface of the piece of the wire coil to acquire the screw blank;
- the wire coil for cold heading comprises low-carbon cold-heading steel, low-carbon alloy steel, martensitic stainless steel and low austenitic stainless steel.
- an extrusion forming mode of 1-die 2-punch or 2-die 4-punch is adopted for the mutual cold extraction of the wire coil by means of the main die and the punch die of the cold header.
- the screw thread surface is provided with a zinc-nickel alloy coating.
- the metric self-tapping locking screw in the Invention is applied to fastening applications of base materials such as high-strength cold-rolled steel, aluminum alloy castings and plastic, and application of the fastening technology with lower tapping moment and higher static loosing moment, so that the installed parts to be fastened have higher axial clamping force, which solves the attenuation problem of axial clamping force and static moment of fastened parts.
- FIG. 1 is a structural diagram of the metric self-tapping locking screw of the Invention
- FIG. 2 is a structural schematic diagram of the metric self-tapping locking screw of the Invention
- FIG. 3 is a structural schematic diagram of the thread of the metric self-tapping locking screw of the Invention.
- a metric self-tapping locking screw of the Invention comprises a screw head 1 , a screw rod 2 , a thread locking body 3 , a self-tapping tip 4 and a screw thread 5 ;
- the screw head 1 is connected to the thread locking body 3 with the screw rod 2 ;
- the thread locking body 3 and the self-tapping tip 4 are provided with the screw thread 5 on the surface;
- the self-tapping tip 4 is arranged at the root of the thread locking body 3 ;
- the screw thread 5 adopts the basic structure of the standard ordinary triangular thread;
- a flank angle ⁇ of the screw thread 5 back to the fastened surface is 15-20° and a flank angle ⁇ facing the fastened surface is 30°;
- a crest 51 of the screw thread 5 is in a plane transition structure or a natural circular arc transition structure.
- the screw thread 5 is divided into eight equal parts by eight mean lines; the eight mean lines include one-eighth line 81 , two-eighth line 82 , three-eighth line 83 , four-eighth line 84 , five-eighth line 85 , six-eighth line 86 , seven-eighth line 87 and eight-eighth line 88 ; a intersection of the four-eighth line 84 and a crest is the first crossing point R 1 ; a intersection of the two-eighth line 82 and a flank side back to the fastened surface is the second crossing point R 2 ; a tangency arc between the first crossing point R 1 and the second crossing point R 2 is the rounded root of thread R; in this way, the fastening performance can be improved.
- the two-eighth line 82 and the screw thread 5 intersect at the third tangency point ⁇ 1 ; the three-eighth line 83 and the screw thread 5 intersect at the forth crossing point ⁇ 2 ; the line connected the third tangency point ⁇ 1 and the forth crossing point ⁇ 2 forms the thread root-diameter angle ⁇ with the two-eighth line 82 ; the thread root-diameter angle ⁇ is 20°.
- the rounded root of thread R constitutes the asymmetry root-diameter structure of the metric self-tapping locking screw together with the thread roof-diameter angle ⁇ .
- the helix angle of the helical line of stressed flank side formed by the asymmetry root-diameter structure is smaller than the helix angle of ordinary screw, and the helical line of stressed flank side formed by the asymmetry root-diameter structure forms the greater axial clamping force borne by the thread together with the connected part, resulting in the locking effect without any sliding or loosening; the asymmetry root-diameter structure is properly added with the thread root diameter of the screw thread 5 to improve the rupture moment of the whole metric self-tapping locking screw.
- the cross-section of the self-tapping tip 4 is in a triangular circular arc transition structure and forms an angle of 8-15° with the plane of the thread locking body 3 ; the crests of the self-tapping tip 4 transit to the thread locking body 3 from small to large in a cone way and the screw threads 5 on the thread locking body 3 gradually diminish to the self-tapping tip 4 in compliance with the crest shape.
- the length of the screw thread 5 on the self-tapping tip 4 is equal to or less than the nominal diameter of the screw thread 5 on the thread locking body 3 .
- the crest angle of main thread is 10-15° smaller than the ordinary triangular thread; the screwing resistance of the main thread and the connected part is reduced and the tapping and locking performance of the thread is greatly improved. Due to the asymmetric angles on both sides of the main crest of the self-tapping locking thread, the helical lines formed by tapping and unscrewing are misaligned. As a result, the frictional force produced by loosening is greater than that formed by the ordinary triangular self-tapping thread, which provides a better locking performance.
- the manufacturing method of the metric self-tapping locking screw of the Invention includes the following steps:
- Step I Preparing a wire coil for cold heading to manufacture the cylinder of the metric self-tapping locking screw; the circular section diameter of the wire coil for cold heading is equal or greater than the diameter of the screw head 1 ;
- Step II Cutting out the wire coil for cold heading by a cold header to acquire a piece of the wire coil for cold heading with the length equal to the metric self-tapping locking screw;
- Step III Using the main die and the punch die of the cold header for mutual cold extrusion of the piece of the wire coil; the screw head 1 , the screw rod 2 , the thread locking body 3 and the self-tapping tip 4 are formed on the surface of the piece of the wire coil to acquire the screw blank;
- Step IV Rolling and extruding the screw blank by thread rolling and molding equipment and self-tapping screw die so that the screw thread 5 is formed on the surface of the thread locking body 3 and the self-tapping tip 4 to acquire the semi-finished screw product;
- Step V Conducting carburizing treatment and thermal refining on the surface of the semi-finished screw product of screw thread 5 to enhance the hardness and strength of the semi-finished screw product and acquire the finished metric self-tapping locking screw.
- the wire coil for cold heading includes low-carbon cold-heading steel, low-carbon alloy steel, martensitic stainless steel and low austenitic stainless steel.
- Various raw materials can be used to manufacture the metric self-tapping locking screw, reducing the original procurement difficulty of manufacturing of the metric self-tapping locking screw.
- An extrusion forming mode of 1-die 2-punch or 2-die 4-punch is adopted for the mutual cold extraction of the wire coil by means of the main die and the punch die of the cold header, which facilitates machining of wire coil by the cold header and reduces the production difficulty of the screw blank.
- the surface of the screw thread 5 is coated with a zinc-nickel alloy coating which protects the surface of the screw thread 5 and provides higher corrosion resistance for the screw thread 5 .
- the metric self-tapping locking screw in the Invention is applied to fastening applications of base materials such as high-strength cold-rolled steel, aluminum alloy castings and plastic, and application of the fastening technology with lower tapping moment and higher static loosing moment, so that the installed parts to be fastened have higher axial clamping force, which solves the attenuation problem of axial clamping force and static moment of fastened parts.
- the manufacturing method of the metric self-tapping locking screw of the Invention is characterized by simple steps, low cost and easy operation.
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Abstract
Description
Claims (3)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CN201710064953.8 | 2017-02-05 | ||
CN201710064953 | 2017-02-05 | ||
CN201710064953.8A CN107816483A (en) | 2017-02-05 | 2017-02-05 | Metric system self tapping backing-up screw and its manufacture method |
Publications (2)
Publication Number | Publication Date |
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US20180223889A1 US20180223889A1 (en) | 2018-08-09 |
US10385903B2 true US10385903B2 (en) | 2019-08-20 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US15/587,436 Expired - Fee Related US10385903B2 (en) | 2017-02-05 | 2017-05-05 | Metric self-tapping locking screw and the manufacturing method thereof |
Country Status (3)
Country | Link |
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US (1) | US10385903B2 (en) |
JP (1) | JP6431127B2 (en) |
CN (1) | CN107816483A (en) |
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CN109175887B (en) * | 2018-07-18 | 2020-08-07 | 上海顺翼紧固件有限公司 | Production process and application of square step adjusting bolt |
USD906099S1 (en) * | 2019-02-26 | 2020-12-29 | Winter Equipment Company | Carriage bolt |
KR20210020521A (en) | 2019-08-16 | 2021-02-24 | 삼성전자주식회사 | Screw anti-loosening structure and electronic device |
USD909857S1 (en) * | 2019-08-27 | 2021-02-09 | Sps Technologies, Llc | Blind fastener bolt head |
USD909856S1 (en) * | 2019-08-27 | 2021-02-09 | Sps Technologies, Llc | Blind fastener bolt |
USD918701S1 (en) * | 2020-02-03 | 2021-05-11 | Wheel Pros, Llc | Bolt |
USD918700S1 (en) * | 2020-02-03 | 2021-05-11 | Wheel Pros, Llc | Bolt |
USD952450S1 (en) * | 2020-02-03 | 2022-05-24 | Wheel Pros, Llc | Bolt |
CN111219401A (en) * | 2020-03-11 | 2020-06-02 | 上海索力迪紧固件系统有限公司 | 5G smart phone-based ultra-small precise anti-loosening screw and manufacturing process thereof |
CN113894372B (en) * | 2021-09-29 | 2022-12-27 | 航天精工股份有限公司 | MOD correction thread rolling wheel and machining method for correcting large-diameter threads |
CN114713653A (en) * | 2022-03-24 | 2022-07-08 | 上海工程技术大学 | Machining method and forming die assembly for long rod part with threaded teeth for vehicle |
Citations (13)
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---|---|---|---|---|
US2167559A (en) * | 1937-06-24 | 1939-07-25 | Lamson & Sessions Co | Self-tapping screw |
US2167558A (en) * | 1937-06-24 | 1939-07-25 | Lamson & Sessions Co | Self-tapping bolt |
US4527932A (en) * | 1982-03-05 | 1985-07-09 | Richard Bergner Gmbh & Co. | Self-tapping screw |
US5044855A (en) * | 1990-08-31 | 1991-09-03 | Nitto Seiko Co., Ltd. | Thread-forming fasteners |
US5061135A (en) * | 1990-08-28 | 1991-10-29 | Research Engineering & Manufacturing, Inc. | Thread tapping screw |
US5544993A (en) * | 1993-12-13 | 1996-08-13 | H+E,Uml A+Ee Rle; Anton | Threaded fastener |
US5800107A (en) * | 1996-04-19 | 1998-09-01 | Giannuzzi; Louis N. | Self-tapping, screw-type masonry anchor |
US6394726B1 (en) * | 2000-05-31 | 2002-05-28 | Illinois Tool Works Inc. | Threaded fastener |
US6494656B1 (en) * | 2001-09-13 | 2002-12-17 | Conti Fasteners Ag | Self-tapping screw, blank and method for joining thin workpieces and production method for the same |
US6672813B1 (en) * | 1999-06-28 | 2004-01-06 | Aoyama Seisakusho Co., Ltd. | Tapping screw |
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- 2017-02-05 CN CN201710064953.8A patent/CN107816483A/en active Pending
- 2017-05-05 US US15/587,436 patent/US10385903B2/en not_active Expired - Fee Related
- 2017-05-09 JP JP2017093231A patent/JP6431127B2/en not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
---|---|
JP2018123959A (en) | 2018-08-09 |
US20180223889A1 (en) | 2018-08-09 |
CN107816483A (en) | 2018-03-20 |
JP6431127B2 (en) | 2018-11-28 |
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