CN2176458Y - Self screwed bolt by screw squeezing - Google Patents
Self screwed bolt by screw squeezing Download PDFInfo
- Publication number
- CN2176458Y CN2176458Y CN 93224009 CN93224009U CN2176458Y CN 2176458 Y CN2176458 Y CN 2176458Y CN 93224009 CN93224009 CN 93224009 CN 93224009 U CN93224009 U CN 93224009U CN 2176458 Y CN2176458 Y CN 2176458Y
- Authority
- CN
- China
- Prior art keywords
- screw
- screw rod
- thread
- footpath
- big
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A self-screwed bolt by screw-squeezing, extruding standard inner threads without chips by self rotating in an aperture, can interchange a plain screw. A bolt rod is provided with three to twenty convex long-lead helix edges; the starting end of a guide cone takes the profile of 30 DEG to 120 DEG, and along the guide cone gradually transits into a 60 DEGmetric thread basic-profile or a 55 DEGinch thread basic-profile of the bolt rod. With different starting end profiles and different edge numbers, the torque can be adjusted for compression, and the extrusive screw with a high finish degree, great intensity and high precision can be used for thin-walled parts and machine parts with variable loading and receiving impact. With broad application, strong reinforcing ability and good self-locking performance, the bolt can be rolling-manufactured.
Description
The utility model is the extruding tapping screw of fastening piece class in the engineering part, by extruding, promptly acts on the tapping screw that forms screw thread in the object of twisting people's screw by material deformation, and international Patent classificating number is F16B25/06.
The utility model is by the development of international standard ISO1478-83 tapping screw, and it is made up of screw head, screw rod and guide cone, and because of screw rod is cylindrical, when diameter increased, self tapping was screwed into moment and increases, so the diameter of self threading pin is all less than 10 millimeters.Because of its thread height is little, easily thread off, so can only be used for stressed lessly, shake little parts.And the screw that forms is nonstandard, can not exchange with plain screw.
The purpose of this utility model is a kind of applied range of design, and fastening force is strong, and self-locking performance is good, can squeeze out standard female by chipless in unthreaded hole, can exchange with plain screw, and can roll over the screw extrusion tapping screw of system.
Technical solution of the present utility model is: the screw extrusion tapping screw, by screw head (1), screw rod (2) and guide cone (3) three parts are formed, guide cone is circular cone or truncated cone, cone angle is 0 °～60 ° (8), screw thread on the screw rod is a continuous thread, the big helical pitch scroll (4) that on the screw thread of screw rod (2), has 3～20 projectioies, the cross section periphery of screw rod is positive 3～20 polygonal projectioies (6) of arc, the transverse projections of screw rod is a full circle, the profile of screw rod is a big helical pitch helical cylinder (2), the thread profile of protruding part A-A section is 60 ° of basic-profiles of metric thread (5) or 55 ° of basic-profiles of inch screw thread (5) on the cross section of screw rod, and the thread profile of concave arc part B-B section is 60 °～120 ° (7).
The big-and-middle footpath of the screw rod in the utility model (2) is that the footpath adds footpath tolerance in 0.1～0.7 times the internal thread in the nominal of GB screw, the footpath is footpath in the screw nominal in the minimum of screw rod, the footpath the most greatly of screw rod (2) adds 0.6～0.7 times pitch for the big-and-middle footpath of screw rod, and the minimum big footpath of screw rod (2) is the big footpath of nominal of screw.Path, pitch, tooth form etc. are all by existing GB.
Screw thread on the guide cone in the utility model (3) is transited into 60 ° of basic-profiles of metric thread (10) or 55 ° of basic-profiles of inch screw thread (10) of screw portion gradually by 30 °～120 ° thread profile (9) of top first button along guide cone.
The big helical pitch scroll (4) of 3～20 projectioies on the screw rod in the utility model (2) extends on the guide cone continuously.
The utility model compared with prior art has the following advantages:
1, screw portion is the helical cylinder, has the big helical pitch scroll (4) of 3～20 projectioies on the screw flight, can utilize the size of how much regulating moment of torsion of rib.
2, suitable specification limit is big, M0.4～M50 thickness pitch thread.
3, thread profile size and tolerance can repeatedly be dismantled all by existing GB, can exchange with plain screw.
4, can be used for thin-walled parts or be subjected to the mechanical parts of variable load, impact and vibrations.
5, can be used as screw tap and in unthreaded hole, do not have the internal thread of cutting the standard of squeezing out.
Below in conjunction with accompanying drawing embodiment of the present utility model has been described:
Fig. 1 is a screw extrusion tapping screw schematic representation.Fig. 2 is the screw extrusion tapping screw schematic representation that guide cone (3) goes up lobed big helical pitch scroll (4).Fig. 3 is drawing in side sectional elevation and the A-A section and the B-B sectional drawing of screw rod.Fig. 4,5,6 is a guide cone tooth form transition schematic representation.Fig. 7 is a screw extrusion tapping screw stereogram.
The utility model screw extrusion tapping screw, by screw head (1), screw rod (2) and guide cone (3) are formed, guide cone is circular cone or truncated cone, screw thread on the screw rod is a continuous thread, no groove, it is characterized in that: the big helical pitch scroll (4) that on the screw thread of screw rod (2), has 8 projectioies, the cross section periphery of screw rod is the positive 8 limit shape projectioies (6) of arc, the transverse projections of screw rod is a full circle, the profile of screw rod is big helical pitch helical cylinder, the thread profile of protruding part A-A section is 60 ° of basic-profiles of metric thread (5) on the screw rod, and the thread profile of concave arc part B-B section is 100 ° (7).
The big-and-middle footpath of the screw rod in the utility model (2) is that the footpath adds footpath tolerance in 0.6 times the internal thread in the nominal of GB screw, in the minimum of screw rod the footpath be in the nominal of screw directly, the footpath the most greatly of screw rod adds 0.62 times pitch for the big-and-middle footpath of screw rod, and the minimum big footpath of screw rod is the big footpath of nominal of screw.
In the utility model on the guide cone first the button thread profile can be made among different tooth form Fig. 4,5,6 (9).When being used for softer metallic material such as copper, aluminium, the tooth form of guide cone is 60 ° of tooth form Fig. 4; When being used for harder metallic material such as structural steel, guide cone top tooth form is 100 °, along guide cone gradually transition be 60 ° of basic-profile Fig. 6 of screw portion; When being used for materials such as plastics, rubber, guide cone top tooth form is 30 °, along guide cone gradually transition be 60 ° of basic-profile Fig. 5 of screw portion.
The big helical pitch scroll of 8 projectioies on the screw rod in the utility model (2) extends on the guide cone continuously.
Each key element is definite as follows in the utility model:
(1) footpath d in
2mox=d
+ 0.6b
d
2min＝d
(2) big footpath d
Mox=d
2mox+ 0.62p
d
min＝d′
(3) big helical pitch helix angle ω=6 °～15 °
(4) rib is counted n=3～20
(5) guide cone cone angle 2 θ=0 °～60 °
(6) the wide f=0.5 of rib～1.5
D wherein
2---footpath in the screw rod
D '
2---footpath in the screw nominal
D---the big footpath of screw rod
D '---the big footpath of screw nominal
d
1---the screw path
P---pitch
H---footpath tolerance in the internal thread
All the other key elements of screw flight are all by the plain screw criterion calculation.
Example:
Example 1:M3-6h tapping screw
By GB196-83, GB197-83 checks in: d '=3, p=0.5, d '
2=2.675
Check in by GB2516-83: d
1=d '
1=2.459 b=0.1
Then: d
2mox=d '
2+ 0.6h=2.675+0.60.1=2.735
d
2min＝d′
2＝2.675
d
mox＝d
2mox＋0.62p＝2.735＋0.62·0.5＝3.045
d
min＝d′＝3
ω＝6° n＝5 f＝0.5 2θ＝45°
The thread profile angle of screw rod and guide cone is 60 °.Guide cone is a circular cone.
Example 2:M16-6h
Check in method: d '
1=16, p=2, d '
2=14.701, d
1=13.835, b=0.212
Then: d
2mox=14.701+0.60.212=14.828
d
2min＝14.701
d
mox＝14.828＋0.62·2＝16.068
d
min＝16
ω＝10° n＝8 f＝1 2θ＝10°
The thread profile of convex portion A-A section is 60 ° of basic-profiles (5), and the thread profile of concave arc part B-B section is 100 ° (7), and guide cone part top tooth form is 100 ° (9), and guide cone is a truncated cone.
This screw is a kind of screw extrusion tapping screw that does not have chip flute, and chipless squeezes out standard female in the unthreaded hole by self being rotated in, and can exchange with plain screw.Can utilize what and different top thread forms of rib number, adjust moment of torsion, in order to extruding, the screw degree of finish of extruding is good, and intensity is big, and the precision height can be used for thin-walled parts and the mechanical parts of the variable load that is hit.Applied range, fastening force is strong, and self-locking performance is good, and this screw can be rolled over system, and is inexpensive.
Claims (4)
1, the screw extrusion tapping screw, by screw head (1), screw rod (2) and guide cone (3) three parts are formed, guide cone is circular cone or truncated cone, cone angle is 0 °～60 ° (8), it is characterized in that: the big helical pitch scroll (4) that on screw flight, has 3～20 projectioies, the cross section periphery of screw rod is positive 3～20 polygonal projectioies (6) of arc, the transverse projections of screw rod is a full circle, the profile of screw rod is a big helical pitch helical cylinder (2), and the thread profile of protruding part A-A section is 60 ° of basic-profiles of metric thread (5) or 55 ° of basic-profiles of inch screw thread (5) on the cross section of screw rod.
2, screw extrusion tapping screw according to claim 1, it is characterized in that: the big-and-middle footpath of screw rod is that the footpath adds footpath tolerance in 0.1～0.7 times the internal thread in the nominal of GB screw, in the minimum of screw rod the footpath be in the nominal of screw directly, the footpath the most greatly of screw rod adds 0.6～0.7 times pitch for the big-and-middle footpath of screw rod, and the minimum big footpath of screw rod is the big footpath of nominal of screw.
3, according to claim 2 described screw extrusion tapping screws, it is characterized in that: the screw thread on the guide cone (3) is transited into 60 ° of basic-profiles of metric thread (10) or 55 ° of basic-profiles of inch screw thread (10) of screw portion gradually by 30 °～120 ° thread profile (9) of top first button along guide cone.
4, according to claim 2 or 3 described screw extrusion tapping screws, it is characterized in that: the big helical pitch scroll of 3～20 projectioies on the screw rod extends on the guide cone (3) continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93224009 CN2176458Y (en) | 1993-09-08 | 1993-09-08 | Self screwed bolt by screw squeezing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93224009 CN2176458Y (en) | 1993-09-08 | 1993-09-08 | Self screwed bolt by screw squeezing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2176458Y true CN2176458Y (en) | 1994-09-07 |
Family
ID=33802163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93224009 Expired - Fee Related CN2176458Y (en) | 1993-09-08 | 1993-09-08 | Self screwed bolt by screw squeezing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2176458Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069021B (en) * | 2004-10-29 | 2012-11-07 | 株式会社弥满和制作所 | Shape of screw and screw part having the same |
| CN115201470A (en) * | 2022-09-15 | 2022-10-18 | 山东博科诊断科技有限公司 | Antigen detection reagent card with more stable connectivity |
-
1993
- 1993-09-08 CN CN 93224009 patent/CN2176458Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069021B (en) * | 2004-10-29 | 2012-11-07 | 株式会社弥满和制作所 | Shape of screw and screw part having the same |
| CN115201470A (en) * | 2022-09-15 | 2022-10-18 | 山东博科诊断科技有限公司 | Antigen detection reagent card with more stable connectivity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |