CN208474291U - A kind of self tapping self-drilling screw for having overlength and drilling through ability - Google Patents

Abstract

The utility model discloses a kind of self tapping self-drilling screws for having overlength and drilling through ability, belong to screw field.A kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model, including headed self-tapping self-drilling screw ontology, the headed self-tapping self-drilling screw ontology include screw rod, screw terminal and drilling tail, and the length of the drilling tail is 18mm；The drilling tail includes drill body and two main cutting inclined edges for being formed in drill body end, two main cutting inclined edge center symmetric settings, and horizontal horizontal cutting edge is formed between two main cutting inclined edges；Extended there is the arc chip space directly excluded so as to iron filings from two main cutting inclined edges are each on the drill body.The utility model is by the improvement to drilling tail, so that can guarantee the very strong ability for drilling through steel plate, has the cracking speed for drilling through steel plate, there is the ability for the steel plate for drilling through 15mm thickness.

Description

A kind of self tapping self-drilling screw for having overlength and drilling through ability

Technical field

The utility model relates to a kind of self tapping self-drilling screw, has overlength more specifically to a kind of and drill through ability Self tapping self-drilling screw.

Background technique

Traditional common self tapping is mainly used for the connection and fixation of some brackets or purlin steel plateelement from the screw bored, such as The connection of color steel plate and color steel plate, color steel plate and purlin, connection of wall beam etc., penetration capacity are usually no more than 6.5mm, most It is no more than 12.7mm greatly.Common self tapping is currently that cannot achieve greater than the steel plate of 12.7mm thickness for connection from the screw bored, Some high-end customers, which need a kind of novel overlength to drill through ability headed self-tapping self-drilling screw, can drill through very thick steel plate, mainly use In connection 15mm or so thick steel plate (if because thick steel plate using aperture, the technique for installing screw and matching nut and gasket If, then installation cost can be very high), in addition traditional common self tapping is in same level from the two main cutting inclined edges bored Line is formed centrally within apex point, and when attacking brill, such central point readily becomes a dead point, therefore attacks fast slow, stability Poor, stock-removing efficiency is relatively low.In-site installation personnel are easily skidded very much in the when marquis for applying external force installation, it is easy to cause safety Accident；And the use that traditional common self tapping bores certainly is cut the iron filings to get off and is spread around, iron filings such as stop at plane chip space Hole wall is stayed in, will form Integrated Chip residual, therefore common Self Drilling Screws will increase side cutting edge in drilling tail side, so as to reaming and disappear Except Integrated Chip remains, but still there is Integrated Chip phenomenon, if Integrated Chip is fallen to main cutting edge, and high-speed rotating main cutting edge friction, then Main cutting edge can be damaged, makes to shoot speed decline, or even can not shoot

Summary of the invention

1. utility model technical problems to be solved

The purpose of the utility model is to overcome above-mentioned deficiency, provide it is a kind of have overlength drill through the self tapping of ability from Drilling screw, it is simple in sturcture, ingenious in design using the technical solution of the utility model, by the improvement to drilling tail, so that can guarantee There is the very strong ability for drilling through steel plate, has the cracking speed for drilling through steel plate, there is the ability for the steel plate for drilling through 15mm thickness.

2. technical solution

In order to achieve the above objectives, technical solution provided by the utility model are as follows:

A kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model, including headed self-tapping self-drilling screw ontology, The headed self-tapping self-drilling screw ontology includes screw rod, screw terminal and drilling tail, and the length of the drilling tail is 18mm；The drilling tail Including drill body and two main cutting inclined edges for being formed in drill body end, two main cutting inclined edge center symmetric settings, and Horizontal horizontal cutting edge is formed between two main cutting inclined edges；On the drill body from two main cutting inclined edges it is each it is extended have so as to The arc chip space that iron filings directly exclude.

Further, the headed self-tapping self-drilling screw ontology is made of 410 stainless irons, the headed self-tapping self-drilling screw Ontology is heat-treated rear surface by nitriding and forms one layer of fine and close hardened layer, and the surface hardness of headed self-tapping self-drilling screw ontology reaches HV750 or more, the core hardness of headed self-tapping self-drilling screw ontology is between HV350-450.

Further, the outer surface of the screw terminal is coated with antirust coat, anti-in screw driver slot in screw terminal Colored coat is coated with outside rusty scale.

3. beneficial effect

It is had the following beneficial effects: compared with existing well-known technique using technical solution provided by the utility model

(1) a kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model, the length of drilling tail are 18mm, The steel plate of 15mm thickness can be guaranteed to drill through；

(2) a kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model, in two main cutting inclined edges The heart is symmetrical arranged, and horizontal horizontal cutting edge is formed between two main cutting inclined edges, simple in sturcture, ingenious in design, is additionally arranged one Cutting edge, to guarantee the very strong ability for drilling through steel plate, when starting drilling, the horizontal cutting edge of central horizontal generates cutting immediately Efficiency makes drilling tail work centre point be cut out dimple immediately, and then main cutting inclined edge gets started cutting, cutting speed Fastly, positioning is quasi-, non-slip, and operator safety in production is promoted；

(3) a kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model is cut from two masters on drill body Cut inclined edge it is each it is extended whether there is or not side edge arc chip spaces, it is simple in sturcture, ingenious in design, original plane chip space is changed to arc chip removal Slot, omits side edge design, and iron filings are pushed by arc clearance surface after generating, can be expelled directly out outside hole, farthest reduce Influence of the iron filings to main cutting inclined edge makes main cutting inclined edge contact iron plate always, improves penetration rate, while protecting to the maximum extent The phenomenon that protecting main cutting inclined edge, damage will not be generated or can not be shot, and in terms of tapping, due to the difference of chip removal, no iron filings Remain in hole, more rapidly, less easy damaged tooth line improves the working efficiency of Self Drilling Screws, to guarantee cracking brill for tapping The speed of saturating steel plate, screw fastening obtain tighter, and user experience is more preferably；

(4) a kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model, headed self-tapping self-drilling screw ontology It being made of 410 stainless irons, headed self-tapping self-drilling screw ontology is heat-treated rear surface by nitriding and forms one layer of fine and close hardened layer, from The surface hardness for attacking self-drilling screw ontology reaches HV750 or more, the core hardness of headed self-tapping self-drilling screw ontology HV350-450 it Between, either surface or core hardness are all significantly more than the self-tapping screw of mild steel, to guarantee that overlength drills through ability Headed self-tapping self-drilling screw reaches high-intensitive and superior toughness desired combination, substantially increases the in-site installation speed and effect of worker Rate enormously simplifies the assembly and design installation of consumer product, and in addition not only hardness is very high for hardened layer, but also resistance to for product Corrosivity improves a lot；

(5) outer surface of a kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model, screw terminal applies It is covered with antirust coat, is attached with antirust coat in the outer surface of screw terminal, long service life shortens the maintenance cycle of building；Screw terminal It is coated with colored coat outside antirust coat in middle screw driver slot, in fastening uses, screw-driving tool force exists In screw driver slot, so that coat in screw driver slot floating or can fall off, since coat has color, from outer Sight easily can intuitively distinguish used self drilling tapping screw and original self drilling tapping screw, from And construction personnel is avoided accidentally to reuse used self drilling tapping screw, it is inadequate to avoid fastening force when reusing The drawbacks of, improve construction efficiency and quality.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram for having overlength and drilling through the self tapping self-drilling screw of ability of the utility model；

Fig. 2 is that a kind of of the utility model has overlength and drill through drilling tail bottom schematic view in the self tapping self-drilling screw of ability.

Label declaration in schematic diagram: 1, screw rod；2, screw terminal；31, drill body；32, main cutting inclined edge；33, horizontal crosscutting Cut sword；34, arc chip space.

Specific embodiment

For the content for further appreciating that the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

Embodiment

A kind of self tapping self-drilling screw for having overlength and drilling through ability of the present embodiment combined with Figure 1 and Figure 2, including self tapping is certainly Auger shell silk ontology, headed self-tapping self-drilling screw ontology include screw rod 1, screw terminal 2 and drilling tail, and the outer surface of screw terminal 2 is coated with antirust Layer, long service life shorten the maintenance cycle of building；Band color is coated with outside antirust coat in screw terminal 2 in screw driver slot Coat, in fastening uses, screw-driving tool exert a force in screw driver slot so that the coat in screw driver slot Meeting floating falls off, can be easily by used self drilling tapping screw from appearance since coat has color It is intuitively distinguished with original self drilling tapping screw, so that construction personnel be avoided accidentally to bore used certainly certainly It attacks screw to reuse, avoids the inadequate drawback of fastening force when reusing, improve construction efficiency and quality

The length of drilling tail is 18mm, can guarantee the steel plate for drilling through 15mm thickness；Drilling tail includes drill body 31 and is formed in brill Two main cutting inclined edges 32 of 31 end of body, two 32 center symmetric settings of main cutting inclined edge, and two main cutting inclined edges 32 it Between be formed with horizontal horizontal cutting edge 33, it is simple in sturcture, ingenious in design, a cutting edge is additionally arranged, to guarantee very strong to drill through steel The ability of plate, when starting drilling, central horizontal horizontal cutting edge generates immediately cuts efficiency, make drilling tail work centre point immediately by Dimple is cut, then main cutting inclined edge gets started cutting, and cutting speed is fast, and positioning is quasi-, and non-slip, operator is raw safely Production is promoted；

Extended there are the arc chip space 34 directly excluded so as to iron filings, structure from two main cutting inclined edges 32 are each on drill body 31 Simply, ingenious in design, original plane chip space is changed to arc chip space, side edge design is omitted, by arc after iron filings generation The push of shape clearance surface, can be expelled directly out outside hole, farthest reduce influence of the iron filings to main cutting inclined edge, make main cutting inclined edge Always iron plate is contacted, penetration rate is improved, while protecting main cutting inclined edge to the maximum extent, damage will not be generated or can not be shot The phenomenon that, and in terms of tapping, due to the difference of chip removal, no iron filings remain in hole, tapping more rapidly, less easy damaged tooth Line improves the working efficiency of Self Drilling Screws, and to guarantee the cracking speed for drilling through steel plate, screw fastening obtains tighter, user experience More preferably；Headed self-tapping self-drilling screw ontology is made of 410 stainless irons, and headed self-tapping self-drilling screw ontology is heat-treated rear surface shape by nitriding At one layer of fine and close hardened layer, the surface hardness of headed self-tapping self-drilling screw ontology reaches HV750 or more, headed self-tapping self-drilling screw ontology Core hardness between HV350-450, either surface or core hardness all significantly be more than mild steel self-tapping screw, Reach high-intensitive and superior toughness desired combination to guarantee that overlength drills through ability headed self-tapping self-drilling screw, substantially increases worker In-site installation speed and efficiency, enormously simplify consumer product assembly and design installation, in addition not only hardness is non-for hardened layer Chang Gao, and improve a lot for product corrosion resistance.

A kind of self tapping self-drilling screw for having overlength and drilling through ability of the utility model, it is simple in sturcture, ingenious in design, pass through Improvement to drilling tail has the cracking speed for drilling through steel plate, drills through so that can guarantee the very strong ability for drilling through steel plate The ability of the steel plate of 15mm thickness.

Schematically the utility model and embodiments thereof are described above, description is not limiting, attached drawing Shown in be also one of the embodiments of the present invention, actual structure is not limited to this.So if this field Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design Frame mode similar with the technical solution and embodiment, all should belong to the protection range of the utility model.

Claims (3)

1. a kind of self tapping self-drilling screw for having overlength and drilling through ability, including headed self-tapping self-drilling screw ontology, the self tapping bores certainly Screw ontology includes screw rod (1), screw terminal (2) and drilling tail, it is characterised in that: the length of the drilling tail is 18mm；Described Drilling tail includes drill body (31) and two main cutting inclined edges (32) for being formed in drill body (31) end, two main cutting inclined edges (32) center symmetric setting, and horizontal horizontal cutting edge (33) is formed between two main cutting inclined edges (32)；The drill body (31) extended there is the arc chip space (34) directly excluded so as to iron filings from two main cutting inclined edges (32) are each on.

2. a kind of self tapping self-drilling screw for having overlength and drilling through ability according to claim 1, it is characterised in that: described Headed self-tapping self-drilling screw ontology is made of 410 stainless irons, and the headed self-tapping self-drilling screw ontology is heat-treated rear surface by nitriding One layer of fine and close hardened layer is formed, the surface hardness of headed self-tapping self-drilling screw ontology reaches HV750 or more, headed self-tapping self-drilling screw ontology Core hardness between HV350-450.

3. a kind of self tapping self-drilling screw for having overlength and drilling through ability according to claim 2, it is characterised in that: described The outer surface of screw terminal (2) is coated with antirust coat, is coated with outside the antirust coat in screw terminal (2) in screw driver slot colored Coat.