CN204591927U - A kind of specified pretightening force light bolt structure - Google Patents
A kind of specified pretightening force light bolt structure Download PDFInfo
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- CN204591927U CN204591927U CN201520273708.4U CN201520273708U CN204591927U CN 204591927 U CN204591927 U CN 204591927U CN 201520273708 U CN201520273708 U CN 201520273708U CN 204591927 U CN204591927 U CN 204591927U
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- taper
- plane
- hexagon bolt
- pretightening force
- groove
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Abstract
The utility model discloses a kind of specified pretightening force light bolt structure, this structure comprises the bolt being provided with screw rod and hexagon bolt head, hexagon bolt head is provided with inclined-plane and twists into two parts groove and taper lightening core, the bottom land that groove is twisted into two parts on inclined-plane is at the bottom of arc-shaped slot, the bottom surface of taper lightening core is circular cone bottom surface, the conical surface joining place of circular cone bottom surface and taper lightening core is greater than to the distance of hexagon bolt end surface the distance of bottom land lowermost end to hexagon bolt end surface that groove is twisted into two parts on inclined-plane, and the circular cone bottom surface lowermost end of taper lightening core is less than the length of hexagon bolt head to the distance of hexagon bolt end surface.Adopt the specified pretightening force light bolt of the utility model structural type that design weight can be made to minimize.The utility model not only has high, the lightweight advantage of structural strength, and the utility model also has the advantages such as fabricating cost is lower, preparation process is simple, product reliability is high, safe and convenient to use.The utility model has very high promotional value.
Description
Technical field
the utility model relates to a kind of specified pretightening force light bolt structure, belongs to aircraft or submersible fastening piece or link manufacture technology field.
Background technique
in aircraft, submersible Element Design, multi-functional, volume is little, lightweight, intensity is high, the high-end fastener technology requirement of controlled pretightening force reliable performance is high, complex structure, technology difficulty are large, expensive.The fastening piece used on board the aircraft requires that its minimize weight is maximum puzzlement always when proof strength is certain.Weight is a parameter of aircraft fastening piece most critical, adopts the lightweight material that density is little, and the effective volume reducing product is almost the unique channel of one of solution puzzlement now.On aerospace vehicle, submersible, product is overweight is all definitely unallowed.At present, fastening piece used in the prior art is in order to obtain the fastening piece compared with light weight, usually be all adopt light metal material to make, but because the intensity of light metal material is lower, in order to obtain certain intensity, have to again increase the volume of fastening piece, this have impact on again the space of aircraft preciousness.The production method of the fastening piece therefore on existing aircraft or submersible or not ideal enough, still can not meet the requirement of actual use.
Model utility content
the purpose of this utility model is, provide a kind of can meet Structural strength calls, again can weight reduction and reliability specified pretightening force light bolt structure high, safe and convenient to use, to overcome the deficiencies in the prior art.
the technical solution of the utility model forms like this:
one of the present utility model specified pretightening force light bolt structure is, this structure comprises the bolt being provided with screw rod and hexagon bolt head, hexagon bolt head is provided with inclined-plane and twists into two parts groove and taper lightening core, the bottom land that groove is twisted into two parts on inclined-plane is at the bottom of arc-shaped slot, the bottom surface of taper lightening core is circular cone bottom surface, the conical surface joining place of circular cone bottom surface and taper lightening core is greater than to the distance of hexagon bolt end surface the distance of bottom land lowermost end to hexagon bolt end surface that groove is twisted into two parts on inclined-plane, and the circular cone bottom surface lowermost end of taper lightening core is less than the length of hexagon bolt head to the distance of hexagon bolt end surface.
the hole conical surface of above-mentioned taper lightening core and the angle of its center line are 5 ° ~ 20 °, the circular cone bottom surface of taper lightening core and the angle of its center line are 45 ° ~ 80 °.
above-mentioned inclined-plane is twisted into two parts groove and is formed by the bottom of two inclined-planes of symmetry and arc-shaped slot, and two inclined-planes are connected with transition at the bottom of arc-shaped slot, and the angle between two inclined-planes is 15 ° ~ 30 °.
the above-mentioned inclined-plane radius of arc twisted into two parts at the bottom of the arc-shaped slot of groove is 0.1mm ~ 0.3mm.
the above-mentioned inclined-plane bottom land lowermost end of twisting into two parts groove is not less than 0.5mm to the distance of the taper lightening core hole conical surface.
the planeness of above-mentioned carrying end face is less than 0.05mm, and is not more than 0.1mm with the perpendicularity of pitch line.
product strength, product weight (lightening core size need be changed and guarantee product strength) is affected due to bright.Have employed technique scheme, the bar material that the utility model adopts intensity to be greater than 1100MPa becomes part blank through hot press moulding or forging forming, this not only improves stock utilization effectively, meet modern few cutting or the development trend without cutting, and the utility model adopts advanced hitech materials, intensity and the plasticity of material are fabulous, the crystal grain of material therefor does not rupture after hot press moulding or forging forming, form is streamline shape, the i.e. even full height orientation of grain flow line, and the utility model by material after mold pressing or forging forming again through cooling rapidly, the grain size of material is made to reach 3 ~ 6 grades, greatly strengthen tensile strength and the fatigue resistance of material, simultaneously, the utility model adopts distinctive structure, when ensureing bolt strength, effectively alleviate the weight of bolt.Use through actual tests and prove, adopt the specified pretightening force light bolt of the utility model structural type that design weight can be made to minimize, namely when same size, the weight ratio specified pretightening force bolt weight of the prior art of specified pretightening force light bolt of the present utility model reduces about 15%, and its structural strength is higher than specified pretightening force bolt of the prior art.This will be great contribution to the lifting capacity of aerospace vehicle, submersible.Therefore, compared with prior art, the utility model not only has high, the lightweight advantage of structural strength to the utility model, and the utility model also has the advantages such as fabricating cost is lower, preparation process is simple, product reliability is high, safe and convenient to use.The utility model has very high promotional value.
Accompanying drawing explanation
fig. 1 is structural representation of the present utility model;
fig. 2 is the plan structure schematic diagram of Fig. 1;
fig. 3 is the T portion partial enlargement structural representation of Fig. 1.
fig. 4 is application schematic diagram of the present utility model.
being labeled as in accompanying drawing: 1-screw rod, 2-hexagon bolt head, 3-twists into two parts groove in inclined-plane, 4-taper lightening core, 4.1-circular cone bottom surface, 5-carries end face, 6-connected piece, the length of D-hexagon bolt head, d-circular cone bottom surface lowermost end is to the distance of hexagon bolt end surface, the hole conical surface joining place of H-circular cone bottom surface and taper lightening core is to the distance of hexagon bolt end surface, h-twists into two parts on inclined-plane the distance of bottom land lowermost end to hexagon bolt end surface of groove, the hole conical surface of α-taper lightening core and the angle of its center line, the circular cone bottom surface of β-taper lightening core and the angle of its center line, the angle between two inclined-planes of groove symmetry is twisted into two parts on θ-inclined-plane, R-twists into two parts on inclined-plane the radius of arc at the bottom of groove arc-shaped slot, the distance of bottom land lowermost end to the taper lightening core hole conical surface of groove is twisted into two parts on δ-inclined-plane.
Embodiment
below in conjunction with drawings and Examples, the utility model is described in further detail, but not as to any restriction foundation of the present utility model.
embodiment of the present utility model: the utility model is constructed by the making method of following a kind of specified pretightening force light bolt, the method is when making light bolt, the bar material adopting intensity to be greater than 1100MPa becomes after part blank through hot press moulding or forging forming, part blank after this high-temperature molding is cooled in a vacuum rapidly, and then namely cooled part blank is obtained light bolt after machine flinishing is shaping; The bar material that its intensity is greater than 1100MPa is refractory alloy or titanium alloy material, and its high-temperature alloy material can adopt model in prior art to be the material of GH4169 or GH738, and titanium alloy material can adopt model in prior art to be the material of TC4; When being cooled rapidly in a vacuum by the part blank after high-temperature molding, its mode cooled rapidly is water-cooled or nitrogen cooling, and during its water-cooled, the temperature of water preferably controls at 2 DEG C ~ 25 DEG C; When carrying out nitrogen cooling, after being gasified by liquid nitrogen, nitrogen cooling is carried out to part blank; When carrying out hot press moulding or forging forming, its temperature controls the plastic deformation temperatures at material therefor.
according to said method build one of the present utility model specified pretightening force light bolt structure as shown in FIG. 1 to 3, this structure comprises the bolt being provided with screw rod 1 and hexagon bolt head 2, screw thread on screw rod 1 can be made into the arbitrarily screw thread such as metric thread, inch screw thread, U.S. standard screw thread, whitworth thread, MJ screw thread according to needing of using, and its screw thread can be mated with installation matrix screw thread be connected; During making, hexagon bolt head 2 is produced inclined-plane and twists into two parts groove 3 and taper lightening core 4, bottom land inclined-plane being twisted into two parts groove 3 is made as at the bottom of arc-shaped slot, the bottom surface of taper lightening core 4 is made as circular cone bottom surface 4.1, make the conical surface joining place of circular cone bottom surface 4.1 and taper lightening core 4 be greater than to the distance H of hexagon bolt head 2 end face the distance h of bottom land lowermost end to hexagon bolt head 2 end face that groove 3 is twisted into two parts on inclined-plane, and make circular cone bottom surface 4.1 lowermost end of taper lightening core 4 be less than the length D of hexagon bolt head 2 to the distance d of hexagon bolt head 2 end face; Produce the carrying end face 5 with screw rod 1 central axis in the bottom of hexagon bolt head 2 simultaneously, make the planeness of carrying end face 5 be less than 0.05mm, and make the perpendicularity of itself and screw rod 1 center line be not more than 0.1mm; During making, the hole conical surface of taper lightening core 4 and the angle α of its center line are controlled 5 ° ~ 20 °, the circular cone bottom surface 4.1 of taper lightening core 4 and the angle β of its center line are controlled at 45 ° ~ 80 °; Inclined-plane is twisted into two parts groove 3 to be made into and to form by the bottom of two of symmetry inclined-planes and arc-shaped slot, and two inclined-planes are connected (as shown in Figure 3) with transition at the bottom of arc-shaped slot, the angle theta between two inclined-planes is controlled the scope at 15 ° ~ 30 °; The radius of arc R twisted into two parts on inclined-plane at the bottom of the arc-shaped slot of groove 3 controls in 0.1mm ~ 0.3mm scope; In order to ensure certain intensity, during making, the inclined-plane bottom land lowermost end of twisting into two parts groove 3 should be not less than 0.5mm to the distance δ of the taper lightening core 4 hole conical surface, but the concrete size of bottom land lowermost end to the distance δ of the taper lightening core 4 hole conical surface of groove 3 is twisted into two parts on inclined-plane, also should carry out in a conventional manner determining according to required specified pretightening force.
when using specified pretightening force light bolt of the present utility model, only need the screw rod 1 of specified pretightening force light bolt of the present utility model be connected on connected piece 6, then the hexagon bolt head 2 of groove 3 upper part is twisted into two parts by turning inclined-plane, can tight a bolt, when screwing force is greater than the specified pretightening force of regulation, the hexagon bolt head 2 twisting into two parts groove 3 upper part will be departed from specified pretightening force light bolt (as shown in Figure 4) by twisting into two parts, can complete the attended operation of bolt like this when ensureing specified pretightening force.
Claims (6)
1. a specified pretightening force light bolt structure, comprise the bolt being provided with screw rod (1) and hexagon bolt head (2), it is characterized in that: on hexagon bolt head (2), be provided with inclined-plane twist into two parts groove (3) and taper lightening core (4), the bottom land that groove (3) is twisted into two parts on inclined-plane is at the bottom of arc-shaped slot, the bottom surface of taper lightening core (4) is circular cone bottom surface (4.1), the hole conical surface joining place of circular cone bottom surface (4.1) and taper lightening core (4) is greater than to the distance (H) of hexagon bolt head (2) end face the distance (h) of bottom land lowermost end to hexagon bolt head (2) end face that groove (3) is twisted into two parts on inclined-plane, and circular cone bottom surface (4.1) lowermost end of taper lightening core (4) is less than the length (D) of hexagon bolt head (2) to the distance (d) of hexagon bolt head (2) end face, the carrying end face (5) with screw rod (1) central axis is provided with in the bottom of hexagon bolt head (2).
2. specified pretightening force light bolt structure according to claim 1, is characterized in that: the hole conical surface of described taper lightening core (4) and the angle (α) of its center line are 5 ° ~ 20 °, the circular cone bottom surface (4.1) of taper lightening core (4) is 45 ° ~ 80 ° with the angle (β) of its center line.
3. specified pretightening force light bolt structure according to claim 1, it is characterized in that: inclined-plane is twisted into two parts groove (3) and formed by the bottom of two inclined-planes of symmetry and arc-shaped slot, and two inclined-planes are connected with transition at the bottom of arc-shaped slot, the angle (θ) between two inclined-planes is 15 ° ~ 30 °.
4. specified pretightening force light bolt structure according to claim 3, is characterized in that: the radius of arc (R) that inclined-plane is twisted into two parts at the bottom of the arc-shaped slot of groove (3) is 0.1mm ~ 0.3mm.
5. specified pretightening force light bolt structure according to claim 1, is characterized in that: the inclined-plane bottom land lowermost end of twisting into two parts groove (3) is not less than 0.5mm to the distance (δ) of taper lightening core (4) the hole conical surface.
6. specified pretightening force light bolt structure according to claim 1, is characterized in that: the planeness of carrying end face (5) is less than 0.05mm, and is not more than 0.1mm with the perpendicularity of screw rod (1) center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520273708.4U CN204591927U (en) | 2015-04-30 | 2015-04-30 | A kind of specified pretightening force light bolt structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520273708.4U CN204591927U (en) | 2015-04-30 | 2015-04-30 | A kind of specified pretightening force light bolt structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204591927U true CN204591927U (en) | 2015-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520273708.4U Expired - Fee Related CN204591927U (en) | 2015-04-30 | 2015-04-30 | A kind of specified pretightening force light bolt structure |
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| CN (1) | CN204591927U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041816A (en) * | 2015-04-30 | 2015-11-11 | 贵州航天精工制造有限公司 | Manufacturing method of light bolts with rated pretightening force and structure |
| CN105443545A (en) * | 2015-11-18 | 2016-03-30 | 宁波金鹏高强度紧固件有限公司 | Long nut |
-
2015
- 2015-04-30 CN CN201520273708.4U patent/CN204591927U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041816A (en) * | 2015-04-30 | 2015-11-11 | 贵州航天精工制造有限公司 | Manufacturing method of light bolts with rated pretightening force and structure |
| CN105443545A (en) * | 2015-11-18 | 2016-03-30 | 宁波金鹏高强度紧固件有限公司 | Long nut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160430 |