CN107468321B - Bone screw bolt and manufacturing process thereof - Google Patents

Bone screw bolt and manufacturing process thereof Download PDF

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Publication number
CN107468321B
CN107468321B CN201710706187.0A CN201710706187A CN107468321B CN 107468321 B CN107468321 B CN 107468321B CN 201710706187 A CN201710706187 A CN 201710706187A CN 107468321 B CN107468321 B CN 107468321B
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China
Prior art keywords
section
bone
blot
bolt
cutting edge
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CN201710706187.0A
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CN107468321A (en
Inventor
罗伟
何洪波
罗清
刘擎
廖瞻
章灿
田�健
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Xiangya Hospital of Central South University
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Xiangya Hospital of Central South University
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Priority to CN201710706187.0A priority Critical patent/CN107468321B/en
Publication of CN107468321A publication Critical patent/CN107468321A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • A61B17/8615—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A61B17/8635—Tips of screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8665—Nuts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
    • B23G9/001—Working screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B2017/564—Methods for bone or joint treatment

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Neurology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)

Abstract

The invention discloses a bone bolt, which comprises a bolt cap, wherein an adjusting screw is arranged on the bolt cap; the bolt rod comprises a frustum section and a thread section, and the thread section is connected to the bolt cap through the frustum section; the bolt head comprises a cylindrical section and a conical section, wherein the cylindrical section is provided with a plurality of chip grooves, the conical section is provided with a plurality of cutting grooves, the cutting grooves are communicated with the corresponding chip grooves, the joint of the peripheral surfaces of the cutting grooves and the conical section forms a main cutting edge and an auxiliary cutting edge, the bolt head also comprises a plurality of chip removal channels, and the chip removal channels are communicated with the chip grooves; the elastic part is fixedly sleeved on the bolt rod and comprises a guide section and a plurality of elastic arms, one end of each elastic arm is connected to the guide section, and the other end of each elastic arm extends towards the bolt rod; the main channel is communicated with the chip suction hole on the bolt cap and the chip removal channel. The invention has stable connection and less bone fragment residue, and can make two bone sections close to each other to accelerate healing.

Description

A kind of manufacture craft of bone blot and bone blot
Technical field
The present invention relates to the field of medical instrument technology, and in particular to a kind of bone blot, the present invention also manufacture and design this The manufacture craft of bone blot.
Background technique
Bone screw is a kind of internal fixation device for treating fracture, in bone surgery, generally require using bone plate and Bone screw is implemented to fix to fracture site, and in order to reduce operating time, usually used is self-drilling self-tapping silk screw, often at present Bone screw is usually that bone bits are discharged using cutting slot in the course of surgery, and it is residual that bone bits in part are had in discharge process It stays in front of screw and bone, screw can be made to loosen influence healing effect after long-time, in addition, existing bone screw is most only It can play the role of fixed function, and cannot achieve and two planes of disruption of fracture further pressurization, affect the healing time of bone.
Summary of the invention
In view of this, the present invention provides, a kind of bone bits discharge rate is high, is connected firmly, can make the quickening close to each other of two planes of disruption The bone blot of healing rate, and manufacture the manufacture craft of the bone blot.
To achieve the above object, the invention provides the following technical scheme:
A kind of bone blot, comprising:
Nuts, the nuts are equipped with cross deep gouge and adjust screw, and the cross deep gouge is used for the bone blot Installation, it is described adjust screw be used for the bone blot angular adjustment；
Shank of bolt, the shank of bolt include frustum section and thread segment, and the thread segment is connected to institute by the frustum section It states on nuts；
Bolt head, the bolt head include cylindrical section and conical section, and the conical section passes through the cylindrical section and the spiral shell Line section links together, wherein the periphery of the cylindrical section is equipped with several chip pockets, and the conical section is cut equipped with several Slot is cut, the cutting slot is connected with corresponding chip pocket, and the two sidewalls of the cutting slot are connect with the circumferential surface of the conical section Place forms main cutting edge and auxiliary cutting edge, and the auxiliary cutting edge is lower than the main cutting edge, and the bolt head further includes several A channel of chip removal, one end of the channel of chip removal are communicated with the chip pocket；
Elastic component, the elastic component fixation are set on the shank of bolt, and the elastic component includes guide section and several One end of elastic arm, the elastic arm is fixedly connected on one end of guide section, and the other end of the elastic arm is to the bolt Bar extends；
Main channel, one end of the main channel are connected with the absorbing dandruff hole being located on the nuts, the main channel The other end is connected with the other end of the channel of chip removal.
Further, the upper surface of the nuts is equipped with a groove, and the groove is arranged in the cross deep gouge On bottom surface, the side wall of the groove is equipped with several first through hole, and the axis of the first through hole is obliquely installed, the tune One end of section screw passes through the first through hole and connect the deviation angle for adjusting bone blot with connecting plate, under the nuts End face is connected with the big end of the frustum section.
Further, the chip pocket extends along axial screw, and one end of the chip pocket extends to the cylindrical section Outer peripheral surface on, the other end of the chip pocket extends on the front end face of the cylindrical section.
Further, the big end of the conical section is fixedly and coaxially connected with the cylindrical section, the both ends point of the cutting slot It does not extend on the large end face and small end face of the conical section, and the section of the cutting slot is from the big end of the conical section to institute The small end for stating conical section is gradually reduced.
Further, the cylindrical section is identical as thread segment diameter.
Further, the main cutting edge on a cutting slot be located at adjacent another cutting slot on auxiliary cutting edge it Between form transition section, the transition section helically face.
Further, the number of the chip pocket, cutting slot and the channel of chip removal is.
Further, which is made of Ti6AI4V titanium alloy material.
The present invention also provides a kind of manufacture craft for bone blot described above, making step includes:
Step S01: production nuts；
Step S02: frustum section and thread segment are successively made；
Step S03: cylindrical section and conical section are successively made；
Step S04: groove, cross deep gouge and several first through hole being located on nuts are completed, wherein described first The angle of the axis of the axis of through-hole and the nuts is 30 °~60 °；
Step S05: cutting chip pocket and cutting slot are carried out, the chip pocket and cutting slot are in the shape of a spiral；The cutting Slot forms main cutting edge and the auxiliary cutting edge after processing is completed, and the taper lead angle of the main cutting edge is 60~80 °, described auxiliary The taper lead angle of cutting edge is 45~90 °；
Step S06: processing transition section；
Step S07: the processing of absorbing dandruff hole, main channel and channel of chip removal is completed in drilling.
It can be seen from the above technical scheme that making to connect the invention has the advantages that the setting of elastic component avoids bolt from loosening It is good to connect fastness；The setting for adjusting screw, which can make the axis of bone blot generate offset, keeps the fractured bone of connection disconnected to another Fractured bone is close, accelerates healing rate；It is considered to be worth doing using negative pressure extracting bone, avoids the using effect of bone bits remaining influence bone blot.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention. Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is usage state diagram of the invention.
Fig. 2 is a partial structurtes enlarged drawing of the invention.
Fig. 3 is the structural schematic diagram of bolt head of the invention.
Fig. 4 is the top view of bolt head of the invention.
Fig. 5 is the half-section diagram of bolt head of the invention.
In the figure, it is marked as nuts 1, first through hole 11, cross deep gouge 12, adjust screw 13, absorbing dandruff hole 14, groove 16, Shank of bolt 2, thread segment 25, elastic component 23, guide section 231, elastic arm 232, semi-spherical portion 233, bolt head 3, holds bits at frustum section 21 Slot 31, channel of chip removal 32, transition section 33, auxiliary cutting edge 34, cutting slot 35, main cutting edge 37, cylindrical section 38, conical section 39, Main channel 4, connecting plate 5, connecting hole 51.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Referring to figs. 1 to Fig. 5, a kind of bone blot as depicted in figs. 1 and 2 is made of Ti6AI4V titanium alloy material, It include: nuts 1 and shank of bolt 2, the upper surface of the nuts 1 is equipped with a groove 16, sets on the bottom surface of the groove 16 There is a cross deep gouge 12, the cross deep gouge 12 is used for the installation of the bone blot, and the side wall of the groove 16 is equipped with several The first through hole 11 that a annular is uniformly arranged, and the axis of the first through hole 11 is obliquely installed, and is additionally provided on the nuts 1 One adjusts screw 13, and described one end for adjusting screw 13 passes through the first through hole 11 and connect adjustment bone blot with connecting plate 5 Axis deviation angle, make connection knochenbruch end face it is close to the end face wait another knochenbruch together that heals, accelerate Healing rate；The shank of bolt 2 includes frustum section 21 and thread segment 25, the thread segment 25 and the small end of the frustum section 21 End face is fixedly connected, and the lower end surface of the nuts 1 is fixedly connected with the end face of the big end of the frustum section 21.
The bone blot further includes elastic component 23, and the fixation of elastic component 23 is set on the shank of bolt 2, the elasticity Part 23 includes guide section 231 and several elastic arms 232, and one end of the guide section 231 is fixedly connected on the nuts 1 On lower end surface, the upper end of the elastic arm 232 is fixedly connected on the other end of guide section 231, the lower end of the elastic arm 232 Extend to the shank of bolt 2, the elastic component 23 is in back taper, is easy to use, in use, the lower end meeting of the elastic arm 232 It keeps out on the upper surface of the ring baffle of the inner sidewall for the connecting hole 51 for being located at the connecting plate 5, when the shank of bolt 2 continues When moving down, the ring baffle will push 232 lower end of elastic arm and keep out outer peripheral surface in the frustum section 21 of the shank of bolt 2 On, apply upward power for the bone blot, makes the bone blot stable connection, wherein on the lower end of the elastic arm 232 Equipped with a semi-spherical portion 233, the frictional force when elastic component 23 rotates between the ring baffle is reduced.
As shown in Fig. 3, Fig. 4 and Fig. 5, which further includes bolt head 3, and the bolt head 3 includes 38 He of cylindrical section Conical section 39, the cylindrical section 38 is identical as 25 diameter of thread segment, the big end of the conical section 39 by the cylindrical section 38 with The thread segment 25 links together, and the conical section 39, cylindrical section 38, thread segment 25 are coaxially disposed, wherein the cylinder The periphery of section 38 is equipped with several chip pockets 31, and the chip pocket 31 extends along axial screw, and the one of the chip pocket 31 End extends on the outer peripheral surface of the cylindrical section 38, and the other end of the chip pocket 31 extends to the front end face of the cylindrical section 38 On, the conical section 39 is equipped with several cutting slots 35, and the both ends of the cutting slot 35 are distinguished along the bus of the conical section 39 It extends on the large end face and small end face of the conical section 39, and the section of the cutting slot 35 is from the big end of the conical section 39 Small end to the conical section 39 is gradually reduced, and the cutting slot 35 is connected with corresponding chip pocket 31, the cutting slot 35 Two sidewalls and the circumferential surface junction of the conical section 39 form main cutting edge 37 and auxiliary cutting edge 34, and the auxiliary cutting edge 34 Lower than the main cutting edge 37, the bolt head 3 further includes several channel of chip removal 32, one end of the channel of chip removal 32 and institute It states chip pocket 31 to communicate, the other end of the channel of chip removal 32 is identical as one end of main channel 4, one end position of the main channel 4 In on the thread segment 25, the other end of the main channel 4 is extended on the nuts 1, and be located at the nuts 1 on Absorbing dandruff hole 14 be connected, the absorbing dandruff hole 14 is equipped with internal screw thread, and the absorbing dandruff hole 14 is connected with negative pressure equipment, be located at described in Bone bits in chip pocket 31 exclude in vitro, to avoid remaining using negative pressure.
Main cutting edge 37 on a cutting slot 35 and the auxiliary cutting edge 34 that is located on adjacent another cutting slot 35 it Between form transition section 33, the transition section 33 helically face, it is ensured that main cutting edge 37 can quickly be fed, and improve operation Efficiency.
Preferably, the number of the chip pocket 31, cutting slot 35 and the channel of chip removal 32 is 3, triangulation location essence Degree is high.
Embodiment 2
A kind of manufacture craft for bone blot described above, making step include:
Step S01: production nuts 1；
Step S02: frustum section 21 and thread segment 25 are successively made；
Step S03: cylindrical section 38 and conical section 39 are successively made；
Step S04: groove 16, cross deep gouge 12 and several first through hole 11 being located on nuts 1 are completed, wherein The angle of the axis of the axis of the first through hole 11 and the nuts 1 is 30 °~60 °；Preferably, the first through hole 11 Axis and the angle of axis of the nuts 1 be 30 °；
Step S05: cutting chip pocket 31 and cutting slot 35 are carried out, the chip pocket 31 and cutting slot 35 are in the shape of a spiral； The cutting slot 35 forms main cutting edge 37 and the auxiliary cutting edge 34, the taper lead angle of the main cutting edge 37 after processing is completed It is 60~80 °, the taper lead angle of the auxiliary cutting edge 34 is 45~90 °；Preferably, the taper lead angle of the main cutting edge 37 is 68 °, the taper lead angle of the auxiliary cutting edge 34 is 50 °；The taper lead angle is the side wall and the circular cone of the cutting slot 35 The angle formed between the periphery of section 39；
Step S06: processing transition section 33；
Step S07: the processing of absorbing dandruff hole 14, main channel 4 and channel of chip removal 32, the hole of the channel of chip removal 32 are completed in drilling Diameter is 1.8mm, and the aperture of the main channel 4 is 5mm.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (9)

1. a kind of bone blot characterized by comprising
Nuts (1), the nuts (1) are equipped with cross deep gouge (12) and adjust screw (13), the cross deep gouge (12) For the installation of the bone blot, the angular adjustment for adjusting screw (13) and being used for the bone blot；
Shank of bolt (2), the shank of bolt (2) include frustum section (21) and thread segment (25), and the thread segment (25) passes through described Frustum section (21) is connected on the nuts (1)；
Bolt head (3), the bolt head (3) include cylindrical section (38) and conical section (39), and the conical section (39) passes through described Cylindrical section (38) links together with the thread segment (25), wherein the periphery of the cylindrical section (38) is equipped with several appearances It considers to be worth doing slot (31), the conical section (39) is equipped with several cutting slots (35), the cutting slot (35) and corresponding chip pocket (31) Be connected, the circumferential surface junction of the two sidewalls of the cutting slot (35) and the conical section (39) formed main cutting edge (37) with it is auxiliary Cutting edge (34), and the auxiliary cutting edge (34) is lower than the main cutting edge (37), the bolt head (3) further includes several rows It considers to be worth doing channel (32), one end of the channel of chip removal (32) is communicated with the chip pocket (31)；
Elastic component (23), elastic component (23) fixation are set on the shank of bolt (2), and the elastic component (23) includes guiding Section (231) and several elastic arms (232), one end of the elastic arm (232) are fixedly connected on one end of guide section (231) On, the other end of the elastic arm (232) extends to the shank of bolt (2)；
Main channel (4), one end of the main channel (4) is connected with the absorbing dandruff hole (14) being located on the nuts (1), described The other end of main channel (4) is connected with the other end of the channel of chip removal (32).
2. bone blot according to claim 1, which is characterized in that it is recessed that the upper surface of the nuts (1) is equipped with one Slot (16), the cross deep gouge (12) are arranged on the bottom surface of the groove (16), the groove (16) if side wall be equipped with Dry first through hole (11), and the axis of the first through hole (11) is obliquely installed, described one end for adjusting screw (13) passes through The first through hole (11) connect with connecting plate (5) adjustment bone blot deviation angle, the lower end surface of the nuts (1) with The big end of the frustum section (21) is connected.
3. bone blot according to claim 1, which is characterized in that the chip pocket (31) extends along axial screw, and One end of the chip pocket (31) extends on the outer peripheral surface of the cylindrical section (38), and the other end of the chip pocket (31) extends Onto the front end face of the cylindrical section (38).
4. bone blot according to claim 1, which is characterized in that the big end of the conical section (39) and the cylindrical section (38) it is fixedly and coaxially connected, the both ends of the cutting slot (35) extend respectively into the large end face and small end face of the conical section (39) On, and the section of the cutting slot (35) gradually contracts from the small end of big end to the conical section (39) of the conical section (39) It is small.
5. bone blot according to claim 1, which is characterized in that the cylindrical section (38) and thread segment (25) diameter phase Together.
6. bone blot according to claim 1, which is characterized in that the main cutting edge (37) being located on a cutting slot (35) Transition section (33) are formed between the auxiliary cutting edge (34) on adjacent another cutting slot (35), the transition section (33) helically face.
7. bone blot according to claim 1, which is characterized in that the chip pocket (31), cutting slot (35) and described The number of channel of chip removal (32) is 3.
8. bone blot according to claim 1, which is characterized in that the bone blot uses Ti6AI4V titanium alloy material It is made.
9. a kind of manufacture craft for bone blot described in claim 1~8 any one, which is characterized in that production Step includes:
Step S01: production nuts (1)；
Step S02: frustum section (21) and thread segment (25) are successively made；
Step S03: cylindrical section (38) and conical section (39) are successively made；
Step S04: completing groove (16), cross deep gouge (12) and several first through hole (11) being located on nuts (1), In, the angle of the axis of the axis and nuts (1) of the first through hole (11) is 30 °~60 °；
Step S05: cutting chip pocket (31) and cutting slot (35) are carried out, the chip pocket (31) and cutting slot (35) are helically Shape；The cutting slot (35) forms main cutting edge (37) and the auxiliary cutting edge (34), the main cutting edge after processing is completed (37) taper lead angle is 60~80 °, and the taper lead angle of the auxiliary cutting edge (34) is 45~90 °；
Step S06: processing transition section (33)；
Step S07: the processing of absorbing dandruff hole (14), main channel (4) and channel of chip removal (32) is completed in drilling.
CN201710706187.0A 2017-08-17 2017-08-17 Bone screw bolt and manufacturing process thereof Active CN107468321B (en)

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CN107468321B true CN107468321B (en) 2018-12-21

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