CN113847326B - Hexagonal-head screw bolt with hole and production process thereof - Google Patents
Hexagonal-head screw bolt with hole and production process thereof Download PDFInfo
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- CN113847326B CN113847326B CN202111018086.7A CN202111018086A CN113847326B CN 113847326 B CN113847326 B CN 113847326B CN 202111018086 A CN202111018086 A CN 202111018086A CN 113847326 B CN113847326 B CN 113847326B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims description 11
- 238000010008 shearing Methods 0.000 claims description 11
- 238000003801 milling Methods 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 238000005242 forging Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000010330 laser marking Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/20—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of steel wire or the like
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- 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
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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
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
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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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/02—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws divided longitudinally
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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
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/95—Constructional details of connections not covered for in other groups of this subclass with markings, colours, indicators or the like
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Connection Of Plates (AREA)
Abstract
The invention discloses a hexagonal head threaded bolt with holes and a production process thereof, and the hexagonal head threaded bolt comprises a bolt body, a screw head, a head hole, a screw rod thread and a nut, wherein the screw head is a hexagonal head, the lower part of the screw rod is also provided with a series hole, the screw head is provided with the head hole, the center of the screw rod is provided with a positioning cavity, the head hole is communicated with the positioning cavity, the lower part of the screw rod is provided with the series hole, the safety core is also provided with a limiting hole, the safety core is inserted into the positioning cavity, the hexagonal head threaded bolt further comprises a bolt cap, the top of the bolt cap is provided with an observation window, an identification mark is carved on the observation window, the limiting strip enters the screw rod through the series hole in an assembly state and penetrates through the limiting hole to be matched with the safety core, the limiting strip forms a fastening array through being connected with all limiting holes of the hexagonal head threaded bolt with holes on the same plane and the safety core in series, the limiting strip and the safety core after the fastening array is fixed, the limiting strip and the safety core are locked mutually, and the reading number corresponding to the identification mark is observed through the observation window.
Description
Technical Field
The invention relates to the field of fastener processing and manufacturing, in particular to a hexagonal-head threaded bolt with holes and a production process thereof.
Background
A hexagonal-head screw bolt with a hole is a connecting piece, the projection of the head of the bolt along the direction of a threaded rod is a regular hexagon, a through hole radially penetrating through the screw is arranged at the lower part of the screw of the bolt, and two opposite limiting holes are formed on the peripheral side surface of the screw. The anti-loosening device has the advantages that when the anti-loosening device needs to be locked, the hexagon bolt, the hexagon nut and the flat washer are matched for use, a steel wire enters from one end of the through hole as an inlet, and is connected with other threaded bolts with holes through the screw rod together in the same mode from the other end of the through hole as an outlet, so that an array is formed, the anti-loosening effect is achieved, and the connection pair can have a high-level effect of preventing thread loosening caused by over-screwing. The screw part of the existing hexagonal head screw bolt with the hole reduces the movement amplitude after being fixed by the steel wire, disperses the shearing force at the tail part, can be wound and tightened to limit the rotation tendency of the bolt, but cannot detect the state of the bolt through quantification, particularly the tightening of the screw part after the pretightening force is influenced can not be directly embodied, and an external measuring scale is required to be used for measurement. In some use scenes, the state of the bolt needs to be further reinforced, the fastening effect of the hexagon head bolt needs to be strictly detected, unstable factors such as vibration and impact are prevented from causing the connection surface to be loosened, the hexagon head bolt and a fastened part form invisible separation, and hidden danger is generated on equipment stability.
Disclosure of Invention
The invention provides a hexagonal-head threaded bolt with holes and a production process thereof, aiming at the defects in the prior art, the hexagonal-head threaded bolt with holes comprises a bolt body, a bolt head, a head hole, a threaded rod thread and a nut, wherein the bolt head is a hexagonal bolt head, the lower part of the threaded rod is also provided with a serial hole, the bolt head is provided with a head hole, the center of the threaded rod is provided with a positioning cavity, the head hole is communicated with the positioning cavity, the lower part of the threaded rod is provided with a serial hole, the hexagonal-head threaded bolt further comprises a safety core, the lower part of the safety core is provided with a limiting hole, the safety core is inserted into the positioning cavity, the hexagonal-head threaded bolt further comprises a bolt cap, the top of the bolt cap is provided with an observation window, an identification mark is engraved on the observation window, the hexagonal-head threaded bolt further comprises a limiting strip, the limiting strip enters the threaded rod through the serial hole in an assembly state and penetrates through the limiting hole of all the assembled threaded bolts with holes on the same plane and the safety core to form a fastening array, and the fastening array is fixed with the safety core, and the observation mark, and the hexagonal-head threaded bolt is mutually corresponding to the observation mark.
Preferably, the positioning cavity is a cylindrical blind hole, and the head hole is communicated with the circle center of the positioning cavity in any circular section direction up and down on the same axis.
Preferably, the serial holes radially penetrate through the screw rod, and the serial holes are perpendicular to the positioning cavity.
Preferably, clamping grooves are formed in the lower portions of the two opposite sides of the hexagon of the screw head in the direction.
Preferably, the top of bolt cap be the epirelief face, inlay the circular lens that has glass or resin to make, circular lens inlay epirelief face in become the observation window, the observation window be convex lens.
Preferably, the top of the safety core print is carved with a radial line mark and a circumferential ring mark, and the radial line mark and the circumferential ring mark are arranged corresponding to the identification mark.
A hexagonal head screw bolt with holes and a production process thereof, wherein the production process of a bolt body comprises the following steps:
the method comprises the following steps: the forging material clamped in the shearing die is cut into required blanks through the unidirectional movement of the shearing mechanism,
step two: the die extrudes the blank to be preliminarily formed, then the die pushes out the blank,
step three: the blank enters a second die, the second die is used for extrusion, the blank is oblate, then the rear die is used for pushing out the blank,
step four: the blank enters a third forging die, a hexagonal head of the blank is preliminarily formed by cutting the hexagonal three-die kernel, then the blank is pushed into the third forging die by a rear die, the cut material is cut off from the hexagonal head, and the hexagonal head is formed,
step five: grinding the teeth of the screw part by taking the end surface of the hexagonal head as a reference,
step six: the screw rod part is clamped in the clamp by taking the end surface of the hexagon head as a reference, a positioning cavity is formed by drilling a blind hole,
step seven: tapping a hole in the plunger by taking the end face of the hexagonal head as a reference,
step eight: milling by using the outer wall of a milling cutter hole by taking one side face of the hexagonal head as a reference to form a clamping groove,
step nine: drilling a through hole on the side wall of the screw rod by taking the side surface of one side of the hexagon head as a reference to form a serial hole,
step ten: and further, boring a serial hole on the screw rod by using a boring cutter on the side surface of the hexagonal head as a reference.
A hexagonal head screw bolt with hole and its production technology, the production technology of the safety core is:
the method comprises the following steps: the section bar is punched and extruded to form a safe core bar and a safe core head,
step two: the lower part is positioned and punched by taking the end face of the safety core print as a reference to form a limiting hole,
step three: and forming a radial line mark and a circumferential ring mark on the top of the safety core head by a laser marking machine.
A hexagonal head screw bolt with holes and a production process thereof, wherein the production process of a bolt cap comprises the following steps:
the method comprises the following steps: stamping and forming the cylindrical section bar to form an arc dome at one end of the section bar,
step two: positioning the cylindrical bottom surface, forming blind holes by drilling,
step three: the circumference of the blind hole is taken as a reference, a milling cutter mills the bottom surface of the cylinder to form a hexagonal groove positioning opening, wherein clamping bulges are reserved on the inner walls of the corresponding two sides,
step four: boring a through hole in the top blind hole by taking the bottom surface of the cylinder as a reference to form an observation window mounting hole,
step five: and a lens with radial scale marks and circular ring-shaped scale marks is arranged to form an observation window.
In the technical scheme, compared with the prior art, the invention has the beneficial effects that: the safety core is inserted into the positioning cavity, and the limit strip limits the torsion and loosening of the screw rod through the serial holes; the limiting strip limits the vertical loosening and the movement of the screw rod through a limiting hole on the safety core; the bolt head is provided with a bolt cap in an inserted connection mode, the initial state and the current state of the bolt are determined by observing the corresponding state of the identification mark arranged on the observation window of the bolt cap and the scale of the safety core head, and visual judgment basis is provided when the bolt is further loosened and moved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be discussed below, it is obvious that the technical solutions described in conjunction with the drawings are only some embodiments of the present invention, and for those skilled in the art, other embodiments and drawings can be obtained according to the embodiments shown in the drawings without creative efforts.
FIG. 1 is an exploded view of a hexagonal head threaded bolt with holes and a bolt produced by the process.
FIG. 2 is a schematic view of a hexagonal head threaded bolt with holes and a bolt assembly state produced by the hexagonal head threaded bolt with holes.
FIG. 3 is a schematic view of a hexagonal head threaded bolt with holes and a bolt assembly thereof according to the present invention.
FIG. 4 is a schematic view of a hexagonal-head threaded bolt with holes and a bolt body structure in the production process of the hexagonal-head threaded bolt.
FIG. 5 is a structural view of a hexagonal-head threaded bolt with holes and a safety core produced by the hexagonal-head threaded bolt.
FIG. 6 is a schematic view of a hexagonal-head threaded bolt with holes and a bolt cap structure in the production process of the hexagonal-head threaded bolt.
FIG. 7 is a schematic top view of a hexagonal-head threaded bolt with holes and a bolt cap produced by the method.
In the figure: the bolt comprises a bolt body 1, a bolt head 11, a head hole 111, a screw 12, a screw thread 121, a series hole 13, a positioning cavity 14, a bolt cap 2, a positioning opening 21, an observation window 22, an identification mark 23, a safety core 3, a safety core head 31, a limiting hole 32 and a limiting strip 4.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without the need for inventive work, are within the scope of the present invention.
The embodiment of the invention provides a hexagonal-head threaded bolt with holes, aiming at the existing problems shown in the attached drawings 1-7, and the hexagonal-head threaded bolt comprises a bolt body 1, a bolt head 11, a head hole 111, a threaded rod 12 and a threaded rod thread 121, wherein the top of the bolt body 1 is integrally processed to form the bolt head 11, the bolt head 11 is the hexagonal bolt head 11, the head hole 111 is drilled in the center of the plane of the bolt head 11, and clamping grooves are formed in the lower parts of the hexagonal opposite sides of the bolt head 11 in the direction. The center of the screw 12 is provided with a positioning cavity 14, the positioning cavity 14 is a cylindrical blind hole, and the head hole 111 and the center of the positioning cavity 14 in any circular section direction are communicated up and down on the same axis. The lower part of the screw 12 is also provided with a series hole 13, the series hole 13 radially penetrates through the screw 12, and the series hole 13 is vertical to the positioning cavity 14. The screw 12 is externally provided with a screw thread 121 for screwing and matching the screw 12 with a nut.
Still be provided with bolt cap 2, bolt cap 2's top be the epirelief cambered surface, inlay the circular lens that has glass or resin to make, the lens inlay epirelief cambered surface in become observation window 22, observation window 22 be convex lens, observation window 22 on make identification mark 23, identification mark 23 include the ring form scale mark that uses the radial scale mark of lens centre of a circle as the center and use the lens centre of a circle as the concentric circles constitution at center. 2 bottoms of bolt cap be provided with spiral shell head 11 complex hexagon location mouth 21, location mouth 21 inside wall on still be provided with spiral shell head 11 on set up the joint arch of joint recess cooperation joint.
Still include safe core 3 top an organic whole be provided with safe core 31, safe core 31 top carve radial line mark and circumference ring mark, radial line mark with circumference ring mark with the corresponding setting of identification 23. The lower part of the safety core 3 is provided with a limiting hole 32, and the limiting hole 32 is a through hole arranged along the radial direction of the safety core 3. The safety core 3 is inserted into the positioning cavity 14, and the limiting hole 32 can be coincided with the aperture of the serial hole 13 by rotating the safety core 3. The limiting strip 4 enters the screw 12 through the serial hole 13, penetrates through the limiting hole 32 to be matched with the safety core 3 and penetrates out of the other end of the screw 12, and the limiting strip 4 is connected with the limiting holes 32 of all the hexagonal-head screw hole bolts and the safety core 3 in series on the same plane to form fastening array connection.
The limiting strips 4 and the fastened bolts form a bolt fastening array, and the axial rotation and the up-and-down movement of the current bolts are limited by the hardness of the limiting strips and the up-and-down bolt assemblies connected in series in the array.
After the fastening array is fixed, the limiting strip 4 and the safety core 3 are locked with each other, after the locking, the safety core 3 is in a bolt locking state, the bolt cap 2 is clamped on the bolt head 11, and the reading corresponding to the identification mark 23 is observed through the observation window 22.
When the bolt connection state is influenced by factors such as vibration, impact load and the like, and the pretightening force generated by the bolt is insufficient, the stretching deformation of the pre-tightened screw 12 tends to be shortened, the safety core 3 cannot be influenced, so that the longitudinal relative sliding tendency is generated between the serial hole 13 on the screw 12 and the limiting hole 32 on the screw 12, the stretching deformation is stable due to the supporting force provided by the limiting strip 4, and the deformation influence of the screw 12 is reduced within the range of the supporting force of the limiting strip 4. After exceeding the range of the supporting force of the limiting strip 4, the safety core 3 and the screw 12 generate relative dislocation, and the circumferential ring mark on the safety core head 31 and the circumferential ring scale mark of the identification mark 23 generate relative movement. The relative slippage degree is determined by reading the change of the reading and combining the elastic modulus of the bolt material, so that whether the bolt fastening state is stable or not is judged, and the pre-tightening force is further strengthened or reduced according to the requirement, so that the screw 12 reaches the optimal tension. Similarly, when the connection state of the bolt is affected by factors such as vibration and impact load, so that the pretightening force generated by the bolt is insufficient, the nut and the screw thread 121 after pretightening generate relative rotation tendency relative to the thread, the rotation tendency generated by the screw 12 in the matrix and the screws 12 on the upper and lower streams of the bolt matrix generate torsional stress through the limiting strip 4, the limiting strip 4 generates counter-torsion force to the affected bolt under the support of the two screws 12 on the upper and lower streams, the counter-torsion force is shearing force acting on the limiting strip 4, the stability of the screw 12 is maintained in the shearing strength of the material of the limiting strip 4, after the shearing strength is exceeded, the limiting strip 4 generates shearing deformation, the radial linear mark arranged on the safety core head 31 and the radial scale mark of the identification mark 23 generate relative movement, and the change of the rotation index is read. And combining the circumferential and radial change readings with the initial value change, analyzing the bolt state according to the elastic modulus of the hexagon bolt material and the shear strength of the limiting strip 4, and realizing anti-loosening early warning and quantitative anti-loosening.
The invention also comprises a production process of the hexagonal-head threaded bolt with the hole, wherein the production process of the bolt body 1 comprises the following steps:
the method comprises the following steps: the forging stock clamped in the shearing die is cut into required blanks through the unidirectional movement of the shearing mechanism,
step two: the die extrudes the blank to be preliminarily formed, then the die pushes out the blank,
step three: the blank enters a second die, the second die is used for extrusion, the blank is oblate, then the rear die is used for pushing out the blank,
step four: the blank enters a third forging die, a hexagonal head of the blank is preliminarily formed by cutting the hexagonal three-die kernel, then the blank is pushed into the third forging die by a rear die, the cut material is cut off from the hexagonal head, and the hexagonal head is formed,
step five: grinding the screw 12 with the end face of the hexagonal head as the reference,
step six: the screw 12 is partially clamped in the clamp by taking the end face of the hexagon head as a reference, a positioning cavity 14 is formed by drilling a blind hole,
step seven: tapping a hole in the plunger by taking the end face of the hexagonal head as a reference,
step eight: milling by using the outer wall of a milling cutter hole by taking one side face of the hexagonal head as a reference to form a clamping groove,
step nine: taking one side surface of the hexagonal head as a reference, drilling a through hole on the side wall of the screw 12 to form a serial hole 13,
step ten: further, the screw 12 is bored with a boring cutter into the serial hole 13 with reference to the side surface of the hexagonal head.
A hexagonal head screw bolt with hole and a production process thereof, wherein the production process of a safety core 3 comprises the following steps:
the method comprises the following steps: the profile is stamped and extruded to form a safety core 3 rod and a safety core head 31,
step two: the lower part is positioned and punched by taking the end face of the safety core print 31 as a reference to form a limiting hole 32,
step three: by means of a laser marking machine, a radial line mark and a circumferential ring mark are formed on the top of the safety core head 31.
A hexagonal head screw bolt with holes and a production process thereof, wherein the production process of a bolt cap 2 comprises the following steps:
the method comprises the following steps: stamping and forming the cylindrical section bar to form an arc dome at one end of the section bar,
step two: positioning the cylindrical bottom surface, forming blind holes by drilling,
step three: taking the circumference of the blind hole as a reference, milling the bottom surface of the cylinder by a milling cutter to form a hexagonal groove positioning opening 21, wherein clamping bulges are reserved on the inner walls of the corresponding two sides,
step four: boring a through hole in the top blind hole by taking the bottom surface of the cylinder as a reference to form an installation hole of the observation window 22,
step five: the observation window 22 is formed by attaching a lens on which radial scale marks and annular scale marks are drawn.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a hexagonal head screw bolt with hole, includes the bolt body (1), spiral shell head (11), head hole (111), screw rod (12), screw rod screw thread (121), nut, spiral shell head (11) be hexagonal spiral shell head (11), screw rod (12) lower part still be provided with series connection hole (13), its characterized in that: the screw head (11) is provided with a head hole (111), the center of the screw rod (12) is provided with a positioning cavity (14), the head hole (111) is communicated with the positioning cavity (14), the lower part of the screw rod (12) is provided with a serial hole (13), the screw head further comprises a safety core (3), the lower part of the safety core (3) is provided with a limiting hole (32), the safety core (3) is inserted into the positioning cavity (14), the screw head further comprises a bolt cap (2), the top of the bolt cap (2) is provided with an observation window (22), the observation window (22) is engraved with identification marks (23) and further comprises a limiting strip (4), the limiting strip (4) enters the screw (12) through the serial hole (13) in an assembling state and penetrates through the limiting hole (32) to be matched with the safety core (3), the limiting strip (4) is connected with the limiting holes (32) of all the assembled hexagonal-head screw bolts with holes and the safety core (3) on the same plane in series to form a fastening array, the limiting strip (4) and the safety core (3) are locked after the fastening array is fixed, and the reading number corresponding to the identification mark (23) is observed through the observation window (22).
2. The hexagonal-head threaded bolt according to claim 1, wherein: the positioning cavity (14) is a cylindrical blind hole, and the circle centers of the head hole (111) and the positioning cavity (14) in any circular section direction are communicated on the same axis and up and down.
3. The hexagonal-head threaded bolt according to claim 1, wherein: the serial holes (13) radially penetrate through the screw rods (12), and the serial holes (13) are perpendicular to the positioning cavities (14).
4. The hexagonal-head threaded bolt according to claim 1, wherein: the lower parts of two opposite side directions of the hexagon of the screw head (11) are provided with clamping grooves.
5. The hexagonal-head threaded bolt according to claim 1, wherein: the top of bolt cap (2) be the epirelief face, inlay the circular lens that has glass or resin to make, circular lens inlay epirelief face in become observation window (22), observation window (22) be convex lens.
6. The hexagonal-head threaded bolt according to claim 1, wherein: the safety core print is characterized by further comprising a safety core print (31), wherein a radial line mark and a circumferential ring mark are carved on the top of the safety core print (31), and the radial line mark and the circumferential ring mark are arranged corresponding to the identification mark (23).
7. The production process of the hexagonal-head threaded bolt with the hole based on any one of claims 1 to 6, is characterized in that: the production process of the bolt body (1) comprises the following steps:
the method comprises the following steps: the forging material clamped in the shearing die is cut into required blanks through the unidirectional movement of the shearing mechanism,
step two: punching die to extrude the blank, primary forming, then pushing out the blank by the punching die,
step three: the blank enters a second die, the second die is used for extrusion, the blank is oblate, then the rear die is used for pushing out the blank,
step four: the blank enters a third forging die, a hexagonal head of the blank is preliminarily formed by cutting the hexagonal three-die kernel, then the blank is pushed into the third forging die by a rear die, the cut material is cut off from the hexagonal head, and the hexagonal head is formed,
step five: grinding the screw (12) by taking the end face of the hexagonal head as a reference,
step six: the end face of the hexagon head is taken as a reference, the screw (12) is partially clamped in the clamp, a positioning cavity (14) is formed by drilling a blind hole,
step seven: tapping a hole in the plunger by taking the end face of the hexagonal head as a reference,
step eight: milling by using the outer wall of a milling cutter hole by taking one side face of the hexagonal head as a reference to form a clamping groove,
step nine: drilling a through hole on the side wall of the screw rod (12) by taking one side surface of the hexagonal head as a reference to form a serial hole (13),
step ten: furthermore, a boring cutter is used for boring a serial hole (13) on the screw (12) by taking the side surface of the hexagonal head as a reference.
8. The production process of the hexagonal-head threaded bolt with the hole based on any one of claims 1 to 6, is characterized in that: the production process of the safety core (3) comprises the following steps:
the method comprises the following steps: the section bar is punched and extruded to form a safety core (3) rod and a safety core head (31),
step two: the end face of the safety core print (31) is taken as a reference, the lower part is positioned and punched to form a limiting hole (32),
step three: and forming a radial line mark and a circumferential ring mark on the top of the safety core head (31) by a laser marking machine.
9. The production process of the hexagonal-head threaded bolt with the hole based on any one of claims 1 to 6, is characterized in that: the production process of the bolt cap (2) comprises the following steps:
the method comprises the following steps: stamping and forming the cylindrical section bar to form an arc dome at one end of the section bar,
step two: positioning the cylindrical bottom surface, forming blind holes by drilling,
step three: the circumference of the blind hole is taken as the reference, the milling cutter mills the bottom surface of the cylinder to form a hexagonal groove positioning opening (21), wherein clamping bulges are reserved on the inner walls corresponding to the two sides,
step four: boring a through hole in the top blind hole by taking the bottom surface of the cylinder as a reference to form a mounting hole of the observation window (22),
step five: a lens on which radial scale lines and annular scale lines are drawn is attached to form an observation window (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111018086.7A CN113847326B (en) | 2021-09-01 | 2021-09-01 | Hexagonal-head screw bolt with hole and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111018086.7A CN113847326B (en) | 2021-09-01 | 2021-09-01 | Hexagonal-head screw bolt with hole and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113847326A CN113847326A (en) | 2021-12-28 |
| CN113847326B true CN113847326B (en) | 2023-03-21 |
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| CN202111018086.7A Active CN113847326B (en) | 2021-09-01 | 2021-09-01 | Hexagonal-head screw bolt with hole and production process thereof |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050057513A (en) * | 2002-09-21 | 2005-06-16 | 패트릭 더블유 브래슬린 | Split lock screw fastener assembly and method |
| JP2007298155A (en) * | 2006-05-02 | 2007-11-15 | Sakai Kogyo Kk | Clamp-connection device, and clamp-connection method |
| CN103032438A (en) * | 2013-01-09 | 2013-04-10 | 合肥工业大学 | Pop-up single-side bolt fastener |
| CN203548512U (en) * | 2013-09-05 | 2014-04-16 | 宁波九龙紧固件制造有限公司 | Shaft-end spline bolt |
| CN204164128U (en) * | 2014-10-20 | 2015-02-18 | 浙江明泰标准件有限公司 | Multifunction adjusting bolt |
| CN106678155A (en) * | 2015-11-05 | 2017-05-17 | 江苏兴达新材料有限公司 | Combined bolt |
| CN206738369U (en) * | 2017-03-25 | 2017-12-12 | 温州市胜隆标准件制造有限公司 | Bolt |
| CN207500284U (en) * | 2017-08-09 | 2018-06-15 | 海盐光大标准件有限公司 | A kind of graduated fastener of band |
| CN108571504A (en) * | 2018-05-08 | 2018-09-25 | 上海威纳工程技术有限公司 | Accurate pretension bolt |
| CN109268375A (en) * | 2018-10-19 | 2019-01-25 | 上海大学 | A kind of dynamometry bolt |
| CN212131016U (en) * | 2019-09-03 | 2020-12-11 | 景寅龙 | Anti-loosening fastening device for bolt |
| CN212928462U (en) * | 2020-08-25 | 2021-04-09 | 安徽固联紧固件有限公司 | Bolt with locking function |
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