CN212479858U - High-strength bolt - Google Patents
High-strength bolt Download PDFInfo
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- CN212479858U CN212479858U CN202020786892.3U CN202020786892U CN212479858U CN 212479858 U CN212479858 U CN 212479858U CN 202020786892 U CN202020786892 U CN 202020786892U CN 212479858 U CN212479858 U CN 212479858U
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- bolt body
- bolt
- screw
- screw rod
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Abstract
The utility model discloses a high-strength bolt, including the bolt body that adopts the preparation of high-quality alloy structural steel to form, the bolt body includes nut and screw rod, the upper end of screw rod is polished rod section and fixed connection the nut, the lower extreme of screw rod is the screw thread section, this integument of bolt runs through from top to bottom of gathering the sediment passageway, a plurality of scum holes have been seted up in the screw thread section, the scum hole with it communicates to gather sediment passageway, the surface of bolt body is provided with the transition layer, the surface of transition layer is provided with the boronizing layer, the surface on boronizing layer is provided with the thin layer. Through seting up row's cinder hole and collection sediment passageway, be convenient for collect the residue that the tooth in-process produced in the sediment passageway that gathers to avoid the residue to follow the bolt body and remove in the screw hole, then damage fashioned screw hole, influence the joint strength of screw in bolt body.
Description
Technical Field
The utility model relates to a technical field of bolt particularly, relates to a high-strength bolt.
Background
The bolt has wide application in wooden products and mechanical products, is used for fastening and connecting two or more parts into a whole, and is widely applied to the fields of machinery, equipment, vehicles, ships, railways, bridges, buildings and the like.
When the existing self-tapping bolt is used, a drill bit is firstly utilized to drill a hole in metal or nonmetal, then the self-tapping bolt is rotated into the drilled hole, and the thread section of the side wall of the screw rod extrudes the inner wall of the hole to form a threaded hole. During the tapping process, the extruded waste residue can remain in the grooves of the thread segments and move in the grooves along with the rotation of the screw. Because the waste residue has certain hardness, especially to metal material, along with screw rod pivoted waste residue can fish tail threaded hole inner wall, influences the fashioned quality of screw thread, has reduced the intensity after the self tapping bolted connection then.
Although the prior art proposes to coat a thin film, such as hafnium oxide, aluminum oxide, etc., on the outer surface of the bolt by using an atomic deposition method, the strength of the thin film is insufficient, and particularly, during the tightening process, the thin film on the outer layer is damaged due to friction and extrusion between the threads and the tightened part, thereby losing the corrosion resistance.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model provides a high strength bolt, its waste residue of not only being convenient for collect the production improves screw hole shaping quality, and the joint strength of reinforcing bolt body can also improve the corrosion resisting property and the hardness of bolt body.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a high-strength bolt, includes the bolt body that adopts the preparation of high-quality alloy structural steel to form, the bolt body includes nut and screw rod, the upper end of screw rod is polished rod section and fixed connection the nut, the lower extreme of screw rod is the screw thread section, this integument of bolt runs through from top to bottom of gathering the sediment passageway, a plurality of row's cinder holes have been seted up in the screw thread section, the cinder hole with collection sediment passageway intercommunication, the surface of bolt body is provided with the transition layer, the surface of transition layer is provided with the boronizing layer, the surface on boronizing layer is provided with the thin layer.
Further, the slag discharge hole is formed in a groove of the threaded section.
Further, the thickness of the transition layer is smaller than that of the boronizing layer.
Further, the thickness of the boronizing layer is one tenth to one third of the radius of the cross section of the bolt body.
Further, the thickness of the thin film layer is one tenth to one fiftieth of the thickness of the boronized layer.
Furthermore, the bolt body is made of 10.9S-grade or 8.8S-grade high-quality alloy structural steel through heat treatment.
The utility model has the advantages that: the slag discharging hole and the slag collecting channel are formed, so that residues generated in the tapping process can be conveniently collected in the slag collecting channel, and the phenomenon that the residues move in the threaded hole along with the bolt body to damage the formed threaded hole and influence the connection strength of the screwed-in bolt body is avoided; through set up the boronizing layer at bolt body surface, improved the surface hardness of bolt body, screw up the in-process when the bolt body, can not appear damaging because of the extrusion, be favorable to improving corrosion protection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a cross-sectional view of a high-strength bolt according to an embodiment of the present invention;
fig. 2 is a partial cross-sectional view of a high strength bolt according to an embodiment of the present invention.
In the figure:
1. a nut; 2. a screw; 3. screwing the groove; 4. a slag collection channel; 5. a slag discharge hole; 6. a transition layer; 7. a boronizing layer; 8. a thin film layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
As shown in fig. 1-2, according to the utility model discloses a high-strength bolt, including the bolt body that adopts the preparation of high-quality alloy structural steel to form, the bolt body includes nut 1 and screw rod 2, the upper end of screw rod 2 is polished rod section and fixed connection nut 1, the lower extreme of screw rod 2 is the screw thread section, this integument of bolt runs through from top to bottom of album sediment passageway 4, a plurality of row's cinder holes 5 have been seted up in the screw thread section, row's cinder holes 5 with collection sediment passageway 4 intercommunication, the surface of bolt body is provided with transition layer 6, the surface of transition layer 6 is provided with boronizing layer 7, the surface of boronizing layer 7 is provided with thin layer 8.
In a specific embodiment of the present invention, the slag discharge hole 5 is formed in the groove of the threaded section.
In a specific embodiment of the present invention, the thickness of the transition layer 6 is smaller than the thickness of the boronizing layer 7.
In a specific embodiment of the present invention, the thickness of the boronized layer 7 is one tenth to one third of the radius of the cross section of the bolt body.
In one embodiment of the present invention, the thickness of the thin film layer 8 is one tenth to one fiftieth of the thickness of the boronized layer.
In a specific embodiment of the present invention, the bolt body is made of 10.9S-grade or 8.8S-grade high-quality alloy structural steel through heat treatment.
For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.
High strength bolt include the bolt body, the bolt body adopts 10.9S level or 8.8S level high-quality alloy construction steel and forms through the heat treatment preparation, intensity is high. The bolt body comprises a nut 1 and a screw 2.
The upper end of screw rod 2 is the polished rod section, and the lower extreme is the screw thread section, and screw rod 2 and nut 1 all run through from top to bottom by collection sediment passageway 4, and collection sediment passageway 4 is cylindricly, and the inner wall coating of collection sediment passageway 4 has the corrosion-resistant layer, and the material on corrosion-resistant layer is aluminium oxide for improve the corrosion resisting property of bolt body, make it can use in various environments. The upper end of the slag collecting channel 4 penetrates through the screw cap 1, so that the slag collecting channel 4 is communicated with the outside, the inner wall of the slag collecting channel 4 is conveniently coated, and a corrosion-resistant layer is formed. A slag discharge hole 5 is arranged in the groove of the thread section, and the slag discharge hole 5 is arranged along the radial direction of the screw rod 2 and communicated with the slag collecting channel 4. In the 2 tapping processes of screw rod, the screw thread section extrusion is waited the processing hole inner wall and is formed the screw hole, and the residue accessible row's cinder hole 5 that extrudes enters into album sediment passageway 4, avoids the residue scratch screw hole then. The side surface of the screw cap 1 far away from the screw rod 2 is provided with a plurality of screwing grooves 3 which are convenient for screwing the screw rod 2. A plurality of screwing grooves 3 surround the slag collecting channel 4.
When the bolt body is manufactured, the bolt body and borax are mixed and then heated and boronized in the heat treatment process after tapping, the treatment time is selected to be 1-24 hours according to needs, the thickness of the boronized layer 7 can be increased along with the prolonging of the boronizing time, the boronizing heat treatment time is determined according to the grade of the bolt body and the size of the bolt body, the grade high boronizing heat treatment time of the bolt body is long, and the boronizing heat treatment time of the bolt body is long.
A transition layer 6 is further arranged between the bolt body and the boronizing layer 7, and the thickness of the transition layer 6 is smaller than that of the boronizing layer. The layer structure is mainly used for improving the bonding strength of the boronizing layer and the bolt body.
The bolt body is tempered and the like according to the conventional method and then is coated with the thin film layer 8 and the corrosion-resistant layer, the thin film layer 8 is also made of aluminum oxide, the thin film layer 8 is coated in an atomic deposition mode in the embodiment, and the thin film layer 8 is cured through heat treatment after the coating is finished.
To sum up, by means of the technical scheme of the utility model, the slag discharging holes and the slag collecting channel are arranged, so that the slag generated in the tapping process can be conveniently collected in the slag collecting channel, thereby avoiding the slag from moving in the threaded holes along with the bolt body, and further avoiding damaging the formed threaded holes and influencing the connection strength of the screwed-in bolt body; through set up the boronizing layer at bolt body surface, improved the surface hardness of bolt body, screw up the in-process when the bolt body, can not appear damaging because of the extrusion, be favorable to improving corrosion protection.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a high-strength bolt, includes the bolt body that adopts the preparation of high-quality alloy structural steel to form, the bolt body includes nut (1) and screw rod (2), the upper end of screw rod (2) is polished rod section and fixed connection nut (1), the lower extreme of screw rod (2) is the screw thread section, a serial communication port, this integument of bolt runs through from top to bottom in collection sediment passageway (4), a plurality of row's cinder holes (5) have been seted up in the screw thread section, arrange cinder hole (5) with collection sediment passageway (4) intercommunication, the surface of bolt body is provided with transition layer (6), the surface of transition layer (6) is provided with boronizing layer (7), the surface of boronizing layer (7) is provided with thin layer (8).
2. The high strength bolt according to claim 1, characterized in that the slag discharge hole (5) opens in a groove in the threaded section.
3. The high strength bolt according to claim 1, characterized in that the thickness of the transition layer (6) is smaller than the thickness of the boriding layer (7).
4. A high strength bolt according to claim 3, characterised in that the thickness of the boronized layer (7) is one tenth to one third of the radius of the cross-section of the bolt body.
5. The high strength bolt according to claim 4, characterized in that the thickness of the thin film layer (8) is one tenth to one fiftieth of the thickness of the boriding layer.
6. The high strength bolt according to claim 1, wherein said bolt body is made of 10.9S-grade or 8.8S-grade high quality alloy structural steel through heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020786892.3U CN212479858U (en) | 2020-05-13 | 2020-05-13 | High-strength bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020786892.3U CN212479858U (en) | 2020-05-13 | 2020-05-13 | High-strength bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212479858U true CN212479858U (en) | 2021-02-05 |
Family
ID=74460469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020786892.3U Expired - Fee Related CN212479858U (en) | 2020-05-13 | 2020-05-13 | High-strength bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212479858U (en) |
-
2020
- 2020-05-13 CN CN202020786892.3U patent/CN212479858U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210205 |