CN2463593Y - Improved self-tapping screw - Google Patents
Improved self-tapping screw Download PDFInfo
- Publication number
- CN2463593Y CN2463593Y CN 01200311 CN01200311U CN2463593Y CN 2463593 Y CN2463593 Y CN 2463593Y CN 01200311 CN01200311 CN 01200311 CN 01200311 U CN01200311 U CN 01200311U CN 2463593 Y CN2463593 Y CN 2463593Y
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- CN
- China
- Prior art keywords
- blade
- tapping screw
- cutting
- screw
- utility
- 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 - Lifetime
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Abstract
The utility model relates to an improved self-tapping screw. One end of a screw rod is provided with a cap head. The other end forms two edge parts. The two edge parts are positioned at both sides of the center point of the screw rod, and are divided into a first edge part and a second edge part. The two edge parts are respectively provided with scrap escape grooves. The utility model is characterized in that the second edge part adjacent to the center point is provided with a slow cutting part which is below the surface of the second edge part. The utility model can effectively improve the initial cutting speed and the tapping-in speed of the self-tapping screw, and can not destroy the intensity of the edge parts.
Description
The utility model relates to cutter, refer to especially a kind of in machining, the improved self tapping screw in labour-saving comparatively when the speed of attacking can be accelerated and use this self tapping screw beginning.
Existing notification number is " the special-purpose self tapping screw of unrestrained plate " patent of 340584, the screw rod that comprises head and be connected with the head one, one end of the relative head of screw rod is axially established a blade along it, this blade is established first screw section and second screw section in regular turn toward cephalad direction, and the first screw section tooth distance and depth of threat are less than second screw section.In addition, notification number is " self tapping screw structure improvement " patent of 348820, establishes screw terminal above body, and the termination of tool cutting groove for cuttings is established in the below, and body is positioned at and is provided with polygonal, the spiral twill on tool wedge angle limit between screw terminal and termination.
Above-mentioned notification number is 340584 cases, and its head one end is axial along it, establishes a blade, and in fact, two blades form the screw rod center that is symmetricly set on; And notification number is 348820 cases, forms polygonal, the spiral twill on tool wedge angle limit.This self tapping screw often is used to Metallic corrugated sheet etc. and shoots usefulness, and, when this kind self tapping screw was attacked in the beginning, at least have two above blades and contact with Metallic corrugated sheet, thus, it is more undesirable that the beginning is attacked cutting speed, therefore, industry will be utilized the front bevel angle of blade and escape to consider to be worth doing the change at angle in order to promote the cutting speed of self tapping screw, improves cutting speed.The method of this improvement, though can improve partly cutting speed,, still remain to be improved.In addition, when the front bevel angle of blade is too big, can cause the strength deficiency of blade, when cutwork, this blade easily causes the damage situation of bursting apart, and when heat treatment is worked, also is easy to cause failure.
The utility model purpose is, at the problems referred to above, provides a kind of and can effectively promote initial cuts speed, and can not destroy the improved self tapping screw of blade intensity.
The purpose of this utility model is achieved in that a kind of improved self tapping screw, be provided with the cap head by screw rod one end, the other end forms two blades, this two blade is positioned at two sides of screw rod central point, be divided into first blade, second blade, two blades respectively are provided with scrap removing groove, it is characterized in that: the adjacent central spot of second blade is provided with the slow portion of cutting that is lower than the second blade surface.
The utility model also can be realized by following measure: the above-mentioned slow portion of cutting can be breach or different gradients.
Now further specify by the following drawings and embodiment:
Fig. 1, be the utility model stereogram.
Fig. 2, be the utility model plan view
Fig. 3, be the partial enlarged drawing of Fig. 2.
Fig. 4, be that A-A among Fig. 3 is to view.
Referring to Fig. 1, be the preferable embodiment of the utility model, a kind of improved self tapping screw 1 mainly is provided with cap head 11 by screw rod 12 1 ends, the other end forms two blades 13,14 and is made up of the scrap removing groove 15 that two blades 13,14 respectively extend out.
Extend to two sides by the central point 16 of screw rod 12 referring to Fig. 2,3,4, two blades 13,14, form first blade 13, second blade 14 respectively.This second blade 14 is provided with the slow portion 17 of cutting, this slow table plane of cutting portion's 17 adjacent central points 16 and being lower than second blade 14; Slow cut portion 17 and can be structures such as breach or different gradients, when this self tapping screw 1 is shot according to central point 16 rotations, should slow cut portion 17 can't the cutting metal plate, therefore, when self tapping screw of the present utility model was attacked in the beginning, can be only by first blade 13 of central point 16 1 sides as shooting the cutting metal plate earlier, and second blade 14 is because there is slow setting of cutting portion 17, so, second blade 14 did not contact with sheet metal when the beginning attacked, and it can be reduced friction, therefore, this self tapping screw 1 can be shot sheet metal with fast speeds, reaches the speed that promotes the beginning cutting, shoots.
The utility model has the advantages that: be provided with and slowly cut section because self-tapping screw is begun to attack blade, therefore, When this self-tapping screw began to attack, its second blade end contacted with metallic plate, thus reduced the friction of delaying the section of cutting, Therefore restriction, can increase cutting output, reaches quick cutting and labour-saving purpose, moreover, self tapping The intensity of screwdriver blade position can not be changed yet.
Claims (2)
1, a kind of improved self tapping screw, be provided with the cap head by screw rod one end, the other end forms two blades, this two blade is positioned at two sides of screw rod central point, be divided into first blade, second blade, two blades respectively are provided with scrap removing groove, it is characterized in that: the adjacent central spot of second blade is provided with the slow portion of cutting that is lower than the second blade surface.
2, according to the described improved self tapping screw of claim 1, it is characterized in that: the above-mentioned slow portion of cutting can be breach or different gradients.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01200311 CN2463593Y (en) | 2001-01-04 | 2001-01-04 | Improved self-tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01200311 CN2463593Y (en) | 2001-01-04 | 2001-01-04 | Improved self-tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2463593Y true CN2463593Y (en) | 2001-12-05 |
Family
ID=33622618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01200311 Expired - Lifetime CN2463593Y (en) | 2001-01-04 | 2001-01-04 | Improved self-tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2463593Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398067B (en) * | 2013-07-17 | 2015-08-05 | 春雨(东莞)五金制品有限公司 | A kind of screw bolt manufacture process |
| CN108999866A (en) * | 2018-08-13 | 2018-12-14 | 宜兴市怡光环保机械有限公司 | One kind is anti-to break through high-penetration rate flooring nail |
-
2001
- 2001-01-04 CN CN 01200311 patent/CN2463593Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398067B (en) * | 2013-07-17 | 2015-08-05 | 春雨(东莞)五金制品有限公司 | A kind of screw bolt manufacture process |
| CN108999866A (en) * | 2018-08-13 | 2018-12-14 | 宜兴市怡光环保机械有限公司 | One kind is anti-to break through high-penetration rate flooring nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110104 Granted publication date: 20011205 |