CN103557219A - Light bolt fastening piece as well as manufacturing method and mold thereof - Google Patents
Light bolt fastening piece as well as manufacturing method and mold thereof Download PDFInfo
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- CN103557219A CN103557219A CN201310569562.3A CN201310569562A CN103557219A CN 103557219 A CN103557219 A CN 103557219A CN 201310569562 A CN201310569562 A CN 201310569562A CN 103557219 A CN103557219 A CN 103557219A
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Abstract
The invention relates to a light bolt fastening piece applied to aerospace. The generatrix of the transition part of the light bolt fastening piece is designed into a smooth curve similar to a sinusoid, the conical section slant angle of the transition part is relatively small, the transition part is relatively short, and the structure is relatively reasonable; the twist moment of a hexangular quincunx twist hole in the tail part of a bolt is larger, and the twist hole is relatively short, as a result, the mounting is facilitated, the length of the overall bolt is reduced, and a role of lightening is played; by using the mold of a light bolt transition vehicle-roll R, the week part of the transition part is ingeniously strengthened, the mold of a roll R is simple, the cost is low, the operation is simple and convenient, and the efficiency is higher; a twist pin matched with a light bolt fastening part for use can bear larger twist moment compared with a hexagonal twist pin, the length of the twist pin is further reduced, and the service life of the twist pin is prolonged.
Description
Technical field
The present invention relates to a kind of for aerospace light-duty bolt fastener (also claiming high locked bolts).The invention still further relates to the processing method of the transition part on this bolt fastener and the mould of rolling R.
Background technique
In Aeronautics and Astronautics field, light-duty bolt fastener, because it has the features such as lightweight, intensity is high, fatigue behaviour is good, is applied to the connection of housing construction and vitals in large quantities.
Western developed country is started to walk early with production in the research in this field.At present, mainly contain French LiSi, the SPS of the U.S. and U.S. aluminium, there is method separately in its each family to light-duty bolt fastener form structure and processing technology, and has formed the patent of some comparative maturities.Huck International, Inc. under aluminium as beautiful in the U.S., on October 5th, 1999, applied for that name is called the patent that < < lightweight threaded fastener and rolling die > >, the patent No. are 99812743, the main feature of its bolt fastener is: " screw thread blank has a major diameter bar portion and a smaller diameter rods portion, and smaller diameter rods portion is smoothly connected to minor diameter from major diameter by a transition part; The cone section of transition part is extended a tilt angle with respect to the axial straight line perpendicular to bolt, and tilt angle, between 25 °～35 °, can adopt 25 °～55 ° in some cases ".The advantage of this patent is, ending≤the 1.0P of light-duty bolt fastener, deficiency be the tilt angle of cone section of transition part between 25 °～35 °, even can adopt the over-designed of 25 °～55 °, the length of light-duty bolt fastener is relatively also long, and loss of weight is relatively little.
At home, mainly contain space flight Seiko (Tianjin) ,694Chang, 3117 Chang, 3536 ,625Suo Deng fastening piece manufacturers of factory.Wherein, the high locked bolts of < < with groove ending by name has been applied in space flight Seiko (Tianjin) on July 10th, 2012, its processing method and roller > >, the patent No. is 201210236979 patent, its main feature is: " a kind of high locked bolts of with groove ending, comprise nut, polished rod section, thread section and ending section, it is characterized in that: described ending Duan Weiyi groove, the circumferential surface of described groove is a conical surface, the small end of conical surface is connected with polished rod section, the large end of conical surface is connected with thread section, described groove and polished rod section, the joint of thread section is arc surface transition and connects, the groove of ending section adopts roller roll extrusion to form ".And the patent that < < high locked bolts > > by name, the patent No. are 200820300593 has been applied in Guizhou space flight Seiko (i.e. 3536 factories) on April 21st, 2008, its main feature is: " a kind of high locked bolts; its bolt head, screw rod and thread section form, and it is characterized in that: be provided with interior hexagonal hole in the end of thread section ".
In sum, home and abroad fastening piece company mainly around the structure of light-duty bolt changeover portion, the processing method of changeover portion, processing mold and afterbody twisting hole thereof etc. are studied and have applied for Patents, but be all faced with at present the problem (as Fig. 1) that the design of light-duty bolt ending and processing thereof are optimized.
At present, China's Aero-Space are in the flourish stage, huge to the needs of light-duty bolt fastener, and import is expensive, exist made in Great Britain and metric system standard conversion problem, and the delivery cycle cannot guarantee.For meeting the requirement of aerospace development and production domesticization, in the urgent need to us, improve and optimizate or design novel fastening piece, with the blockade on new techniques of breaks through foreign.
Summary of the invention
The present invention aims to provide a kind of rational in infrastructure, light-duty bolt fastener of being easy to install, fully reach loss of weight object, and the transition part of this fastening piece is relatively short, and cone section tilt angle is relatively little, and transition part structure is more reasonable; The twisting hole twisting moment of bolt tail is large, twisting hole is relatively short, has facilitated installation, has reduced the entire length of bolt, thereby has played the effect of loss of weight.The present invention provides the mould of light-duty bolt transition part car-rolling R simultaneously, has strengthened the weak part of transition part stress, and the mould structure of car-rolling R is simple and direct, cost is low, easy and simple to handle, efficiency is high.The present invention also provides and the matching used setting tool of this light-duty bolt fastener.
One of technical measures that the present invention adopts are: by the bus of light-duty bolt transition part, be designed to be the smoothed curve of near sinusoidal curve, corresponding adjustment has been carried out at the cone section tilt angle of transition part, and concrete technological scheme is as follows:
Light-duty bolt fastener, consists of bolt head and screw rod, and described bolt head can be tack or countersunk head, also goes for the bolt of any nose shape; Described screw rod comprises that polished rod section that an one end starts from bolt head and have cylindrical smooth shank portions, one are connected in the relatively short transition part between described polished rod section and thread section at screw axial end with externally threaded thread section and a smooth transition.The diameter of described polished rod section is greater than the diameter of thread section, and described transition part starts from large diameter polished rod section and is transition trend that external diameter reduces gradually and is finally connected with the root of the thread section of minor diameter.
Described transition part is formed by connecting by the first segmental arc, the second segmental arc, inner cone section, the 3rd segmental arc, rear cone section head and the tail rounding off, described the first segmental arc has relatively large radius, it starts from the end of polished rod section and inwardly radially extends to second segmental arc with small radii and be connected gradually, between described the second segmental arc and the 3rd segmental arc, by the public inner cone section being cut between two segmental arcs in, be smoothly connected, the end of described the 3rd segmental arc gradually outward radial extends and is connected with rear cone section, and described rear cone section is connected to the abutting end of thread section via conventional round-corner transition.
Described inner cone section or its line stretcher and perpendicular to bolt axis to straight line between angle be inner cone section tilt angle At, the angular range of described inner cone section tilt angle At is 25 ° of 10 °≤At <;
Described rear cone section or its line stretcher be parallel to bolt axis to straight line between angle be rear cone section tilt angle A0, described rear angular range of boring section tilt angle A0 is 15 °≤A0≤45 °.
Two of the technical measures that the present invention adopts are: the twisting hole to bolt tail redesigns, and changes interior six side's twisting holes of routine into a kind of interior hexagonal plum blossom twisting hole.
The bolt tail of existing light-duty bolt fastener is provided with interior six side's twisting holes, and its degree of depth and shape can not the values of being above standard on the impact of bolt strength performance, and can not produce skidding while requiring to reach mounting torque.Interior six side's twisting holes of this routine must reach certain degree of depth guarantee, and it carries enough twisting moment, and this just will inevitably increase the length of thread section and the weight of whole bolt; For can reduce as far as possible bolt reach, reach the object of bolt loss of weight, the present invention improves six side's twisting holes in original to be designed to interior hexagonal plum blossom twisting hole, concrete structure is six smooth arcuations clamping lobes outstanding, that be distributed in circumferencial direction, having the interior hexagonal plum blossom twisting hole that this arcuation clamps lobe can be in the relatively short larger twisting moment of axial depth carrying, so reduced bolt thread section and twisting pin length, reach bolt loss of weight and extend working life of twisting pin.
Three of the technical measures that the present invention adopts are: light-duty bolt transition part has the weak part of a stress, requires to be cold working to meet physical property.For this reason, the invention provides a kind of processing method of light-duty bolt transition part, utilize turning class lathe to carry out turning, then utilize conventional technique for rolling to carry out rolling to transition part, transition part is adopted to the processing technology of rolling after first car, strengthened the weak part of transition part stress.Be applied to roll the mould in processing technology after first car, comprise by screw 7 and be installed on the anti-lathe tool 8 on knife bar 6 and be installed on the roller 10 on handle of a knife 13 by bearing 11 and roller bearing 12.Utilize turning class lathe to clamp light-duty bolt 9, first after anti-car R, roll extrusion R, to the size that cold working requires, has strengthened transition part stress weakness effectively.The mould of this rolling R with respect to tens thousand of units easily concerning squeezing edging wheel, simple in structure, cost is low, easy and simple to handle, efficiency is higher.
Four of the technical measures that the present invention adopts are: the matching used setting tool in interior hexagonal plum blossom twisting hole that a kind of and light-duty bolt tail of the present invention are provided, this setting tool has mounting head 14, twisting bar 15 and twisting 16, it is hexagonal plum-shaped structure that described twisting 16 changes conventional hexagonal structure, than hexagonal shaped twisting pin, can carry larger twisting moment, and further reduced twisting pin length, extended working life of twisting pin.
Accompanying drawing explanation
Fig. 1 is light-duty bolt arrangement schematic diagram;
Fig. 2 is light-duty bolt transition part bus and transition part inner cone section Zt tilt angle At and rear cone section ZO tilt angle A0 schematic diagram;
Fig. 3-4th, light-duty bolt tail twisting hole is the structural representation of interior hexagonal plum blossom hole;
Fig. 5 is that the requirement of light-duty bolt transition part is cold working to the enlarged diagram that meets physical property part;
Fig. 6 is the mould schematic diagram of light-duty bolt transition part car-rolling R;
Fig. 7-8th, the structural representation of hexagonal is quincunx twisting pin.
Embodiment
Referring to accompanying drawing, provide the specific embodiment of the present invention, be used for formation of the present invention to be further described.
Below in conjunction with accompanying drawing, the invention will be further elaborated.As shown in Figure 1, the invention provides a kind of light-duty bolt fastener, by bolt head 1, polished rod section 2, transition part 3 and thread section 4, formed.Described transition part 3 starts from large diameter polished rod section 2 and is transition trend that external diameter reduces gradually and is finally connected with the root of the thread section 4 of minor diameter.The present invention is by the bus of light-duty bolt transition part 3 (polished rod section, the proximal end of maximum grip length forms the transition wire at the top of complete thread to thread section), be designed to be the smoothed curve of near sinusoidal curve, by the first segmental arc L1, the second segmental arc L2, inner cone section Zt, the 3rd segmental arc L3, rear cone section ZO head and the tail rounding off is formed by connecting, described the first segmental arc L1 has relatively large radius, it starts from the end of polished rod section and inwardly radially extends to the second segmental arc L2 with small radii and be connected gradually, between described the second segmental arc L2 and the 3rd segmental arc L3, by the public inner cone section Zt being cut between two segmental arcs in, be smoothly connected, the end of described the 3rd segmental arc L3 gradually outward radial extends and is connected with rear cone section ZO, described rear cone section ZO is connected to the abutting end of thread section via conventional round-corner transition.The inner cone section Zt tilt angle At(inner cone section Zt of transition part 3 or its line stretcher and perpendicular to bolt axis to straight line between angle) be 10 °, after rear cone section ZO tilt angle A0(cone section ZO or its line stretcher and be parallel to bolt axis to straight line between angle) be 15 °, as shown in Figure 2.When R2, R3 and one timing of R4 size, At is excessive or too small transition part 3 axial lengths of A0 are relatively long, is unfavorable for the object that reduces bolt length, reaches bolt loss of weight; The bus inner cone section Zt of the too small transition part 3 of At can not smoothly be shaped, and easily produces folding, flange and defects i.e.cracks after the bus of the excessive transition part 3 of A0 during cone section ZO rolling screw thread.
Fig. 3～4th, light-duty bolt tail twisting hole 5 is the schematic diagram of interior hexagonal plum blossom hole.Existing light-duty bolt (no matter home and abroad) afterbody twisting hole is interior hexagonal hole, because its twisting moment is relatively little, easily skid, therefore interior hexagonal hole is relatively dark, the bearing strength of light-duty bolt is had to certain influence.By light-duty bolt tail twisting hole design 5, it is interior hexagonal plum blossom hole, concrete structure is six smooth arcuations clamping lobes outstanding, that be distributed in circumferencial direction, having the interior hexagonal plum blossom twisting hole that this arcuation clamps lobe can be in the relatively short larger twisting moment of axial depth carrying, so reduced bolt thread length and twisting pin length, reach bolt loss of weight and extend working life of twisting pin.
Fig. 5 is that the requirement of light-duty bolt transition part is cold working to the enlarged diagram that meets physical property part, and also this transition part has the weak part of a stress, requires to be cold working to meet physical property.For this reason, the invention provides a kind of mould that carries out car-rolling R technique at light-duty bolt transition part, as shown in Figure 6, by knife bar 6, screw 7, anti-lathe tool 8, roller 10, bearing 11, roller bearing 12 and handle of a knife 13, formed.Utilize turning class lathe to clamp light-duty bolt 9, first after anti-car R, roll extrusion R, to the size that cold working requires, has strengthened transition part stress weakness effectively.The mould of this rolling R with respect to tens thousand of units easily concerning squeezing edging wheel, simple in structure, cost is low, easy and simple to handle, efficiency is higher.
Fig. 7～8th, the schematic diagram of hexagonal is quincunx twisting pin, is the matching used twisting pin in interior hexagonal plum blossom twisting hole with this light-duty bolt.Conventionally twisting pin is installed on light-duty bolt setting tool, and concrete structure is six smooth arcuations clamping lobes outstanding, that be distributed in circumferencial direction,, when light-duty bolt fastener is installed, is used for fixing light-duty bolt and is not rotated.This hexagonal is quincunx, and twisting pin can carry larger twisting moment than hexagonal shaped twisting pin, and further reduced twisting pin length, extended working life of twisting pin.
The present embodiment and embodiment's 1 difference is
Described inner cone section or its line stretcher and perpendicular to bolt axis to straight line between angle be inner cone section tilt angle At, its angular range is 24 °; Described rear cone section or its line stretcher be parallel to bolt axis to straight line between angle be rear cone section tilt angle A0, its angular range is 45 °.
The present embodiment and embodiment's 1 difference is
Described inner cone section or its line stretcher and perpendicular to bolt axis to straight line between angle be inner cone section tilt angle At, its angular range is 15 °; Described rear cone section or its line stretcher be parallel to bolt axis to straight line between angle be rear cone section tilt angle A0, its angular range is 25 °.
In sum, the invention provides four kinds of technical measures, make cone section tilt angle relatively little, transition part is relatively short, reduces bolt length, and transition part is the smoothed curve of near sinusoidal curve, and structure is comparatively reasonable; The quincunx twisting of the hexagonal hole twisting moment of bolt tail is large, twisting hole is relatively short, has facilitated installation, has also reduced the entire length of bolt, thereby has played the effect of loss of weight; The mould of light-duty bolt transition part car-rolling R, has strengthened the weak part of transition part stress dexterously, and the mould of rolling R is simple, cost is low, easy and simple to handle, efficiency is higher; With the matching used twisting pin of this light-duty bolt fastener, than hexagonal shaped twisting pin, can carry larger twisting moment, and further reduced twisting pin length, extended working life of twisting pin.
Claims (9)
1. light-duty bolt fastener, is comprised of bolt head, polished rod section, transition part and thread section, it is characterized in that: the busbar of described transition part is the smoothed curve that is near sinusoidal curve, transition part
inner cone section Zt tilt anglethe angular range of At is 25 ° of 10 °≤At <, transition part
rear cone section ZO tilt anglethe angular range of A0 is 15 °≤A0≤45 °.
2. light-duty bolt fastener as claimed in claim 1, is characterized in that: the twisting hole of described thread section afterbody is designed to
interior hexagonal plum blossom hole.
3. light-duty bolt fastener as claimed in claim 1, it is characterized in that: described transition part is by the first segmental arc, the second segmental arc, inner cone section, the 3rd segmental arc, rear cone section head and the tail rounding off is formed by connecting, described the first segmental arc has relatively large radius, it starts from the end of polished rod section and inwardly radially extends to second segmental arc with small radii and be connected gradually, between described the second segmental arc and the 3rd segmental arc, by the public inner cone section being cut between two segmental arcs in, be smoothly connected, the end of described the 3rd segmental arc gradually outward radial extends and is connected with rear cone section, described rear cone section is connected to the abutting end of thread section via conventional round-corner transition.
4. light-duty bolt fastener as claimed in claim 1, is characterized in that
Described transition part
inner cone section tilt angleat refer to perpendicular to bolt axis to straight line and the angle between transition part inner cone section or its line stretcher;
Described transition part
rear cone section tilt anglea0 refer to be parallel to bolt axis to straight line and the rear cone section of transition part or the angle between its line stretcher.
5. light-duty bolt fastener as claimed in claim 2, is characterized in that
Described
interior hexagonal plum blossom holeconcrete structure is six smooth arcuations clamping lobes outstanding, that be distributed in circumferencial direction.
6. one kind supports the use hexagonal plum blossom twisting pin with the interior hexagonal plum blossom hole of light-duty bolt fastener described in claim 5.
7. the processing method of the transition part of a light-duty bolt fastener as claimed in claim 3, it is characterized in that adopting the processing technology of rolling after first car, first utilize turning class lathe to carry out turning, then utilize conventional technique for rolling to carry out rolling to transition part, make it the weak part of transition part stress be cold working to and meet its physical property requirement.
8. be applied to the mould in processing technology described in claim 7, it is characterized in that comprising by screw being installed on the anti-lathe tool on knife bar, and be installed on the roller on handle of a knife by bearing and roller bearing.
9. light-duty bolt fastener as claimed in claim 1, is characterized in that described bolt head is the flat globular model of plane or with the countersunk head shape of tapering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569562.3A CN103557219B (en) | 2013-11-13 | 2013-11-13 | Light bolt fastening piece, its processing method and mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569562.3A CN103557219B (en) | 2013-11-13 | 2013-11-13 | Light bolt fastening piece, its processing method and mould |
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| Publication Number | Publication Date |
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| CN103557219A true CN103557219A (en) | 2014-02-05 |
| CN103557219B CN103557219B (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310569562.3A Active CN103557219B (en) | 2013-11-13 | 2013-11-13 | Light bolt fastening piece, its processing method and mould |
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| CN (1) | CN103557219B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105563419A (en) * | 2015-12-31 | 2016-05-11 | 中国电子科技集团公司第十八研究所 | Disassembly and assembly device for battery pack turning |
| EP3364049A1 (en) * | 2017-02-20 | 2018-08-22 | The Boeing Company | Radiused lead-in for interference fit fasteners |
| CN109236831A (en) * | 2018-10-23 | 2019-01-18 | 航天精工股份有限公司 | A kind of bolt and its transition structure with transition region |
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|---|---|
| CN103557219B (en) | 2015-09-30 |
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Denomination of invention: Lightweight bolt fastener, its processing method and die Effective date of registration: 20220804 Granted publication date: 20150930 Pledgee: Yantai Branch of China Merchants Bank Co.,Ltd. Pledgor: ORIENTAL BLUESKY TITANIUM TECHNOLOGY Co.,Ltd. Registration number: Y2022980011951 |
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Date of cancellation: 20220824 Granted publication date: 20150930 Pledgee: Yantai Branch of China Merchants Bank Co.,Ltd. Pledgor: ORIENTAL BLUESKY TITANIUM TECHNOLOGY Co.,Ltd. Registration number: Y2022980011951 |
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Denomination of invention: Lightweight bolt fastener, its processing method and die Effective date of registration: 20220831 Granted publication date: 20150930 Pledgee: Yantai Branch of China Merchants Bank Co.,Ltd. Pledgor: ORIENTAL BLUESKY TITANIUM TECHNOLOGY Co.,Ltd. Registration number: Y2022980014130 |