CN207272352U - A kind of screw tap for tap - Google Patents
A kind of screw tap for tap Download PDFInfo
- Publication number
- CN207272352U CN207272352U CN201721202496.6U CN201721202496U CN207272352U CN 207272352 U CN207272352 U CN 207272352U CN 201721202496 U CN201721202496 U CN 201721202496U CN 207272352 U CN207272352 U CN 207272352U
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- teeth
- blade
- tap
- bare terminal
- screw tap
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Abstract
The utility model provides a kind of screw tap for tap, belongs to field of mechanical technique, it solves the problems, such as that existing screw tap working effect is poor.This screw tap for being used for tap includes：Body, in rod-shaped setting, body both ends are respectively bare terminal end, working end, and diameter of the working end away from bare terminal end side is less than the diameter close to bare terminal end side；Blade, it is arranged to multiple, each blade is uniformly distributed around working end circumferential lateral surface, each blade extends by working end end face towards bare terminal end, and each blade includes wedging portion, cutting portion and cutting portion and set close to bare terminal end, is provided with a row teeth on blade and teeth extend to cutting portion by wedging portion, teeth in wedging portion are the first teeth, teeth on cutting portion are the second teeth, and the quantity of the first teeth is 28, and the quantity of the second teeth is eight.The utility model has the characteristics that good working effect.
Description
Technical field
The utility model belongs to field of mechanical technique, is related to a kind of screw tap for tap.
Background technology
In the cold-heading molding technique of nut, material need to pass through multimode Pressing Deformation to punching, just complete nut semi-finished product
Shaping, complete product is obtained finally by tapping is carried out to semi-finished product nut.Universal at present is all to carry out tapping using screw tap
（Cut internal thread）, to reach required screw thread specification, and screw tap can process it is various in, small size internal thread, it is simple in structure,
It is easy to use, it is both manually actuated, it can also work on lathe, using very extensive.
Tapping is a kind of relatively difficult cutting technology, its plug tap is almost embedded in workpiece and is cut
, the machining load of each teeth will be big than other cutters.Screw tap is easily subject to temperature caused by tapping at work
Influence, also teeth on screw tap can be caused to damage with caused chip, expand with the demand of high intensity high-quality nut product
Greatly, when carrying out tapping to nut using common screw tap, the structure of screw tap is easily damaged, and service life is relatively low, and then causes spiral shell
Female internal thread precision is not high, influences nut follow-up installation and use.
In addition, existing screw tap surface accuracy is not ideal enough, the precision of the nut inner thread of tapping generation is caused not reach
Actual operation requirements, so as to have impact on the quality of nut entirety.
In conclusion to solve the deficiency in the screw tap structure in existing nut production, the utility model devises one kind
The screw tap for tap of stable structure, good working effect.
The content of the invention
The utility model is existing in the prior art to solve the problems, such as, there is provided a kind of stable structure, the use of good working effect
In the screw tap of tap.
The purpose of this utility model can be achieved through the following technical solutions：A kind of screw tap for tap, including：
Body, in rod-shaped setting, body both ends are respectively bare terminal end, working end, and working end is straight away from bare terminal end side
Footpath is less than the diameter close to bare terminal end side；
Blade, is arranged to multiple, and each blade is uniformly distributed around working end circumferential lateral surface, and each blade is by working end end
Extend facing to bare terminal end, each blade includes wedging portion, cutting portion and cutting portion and set close to bare terminal end, is set on blade
There are a row teeth and teeth extend to cutting portion by wedging portion, the teeth in wedging portion are the first teeth, the teeth on cutting portion
For the second teeth, the quantity of the first teeth is 28, and the quantity of the second teeth is eight.
Further as this case is improved, and on axial cross section, the section of the first teeth is set in quadrangle, and positioned at same
The top margin of each first teeth on one blade is in same straight line.
Another step as this case is improved, on axial cross section, the section setting triangular in shape of the second teeth, and same blade
On each second teeth at the top of line and body axial line set in angle, and the height of second teeth in close wedging portion is big
In the height of the first adjacent teeth.
Further as this case is improved, and forms chip space between two neighboring blade, each chip space is by a knife
Sword arc transition is equal along involute direction around the axial line of body to another adjacent blade, the opening direction of each chip space
Even distribution.
Compared with prior art, the structure design of the utility model is reasonable, by the number of teeth for increasing wedging portion（Length）, attacking
Guiding accuracy is improved in tooth production, promotes screw tap accurately to enter nut and carries out tapping；In addition, the length for increasing wedging portion causes silk
The blade durability of cone is more preferable, and cutting torsion is more steady, is conducive to improve the smoothness in internal thread cutting face；It can subtract at the same time
Few blade fever, avoids the appearance of burr, ensures the quality of tapping.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is the structure diagram at another visual angles of Fig. 1.
In figure, 10, body；11st, bare terminal end；12nd, working end；20th, blade；21st, wedging portion；22nd, cutting portion；23rd, chip removal
Groove；31st, the first teeth；32nd, the second teeth.
Embodiment
With reference to embodiment and attached drawing, the technical solution of the utility model is further elaborated.
As depicted in figs. 1 and 2, this screw tap for being used for tap includes：
Body 10, in rod-shaped setting, 10 both ends of body are respectively bare terminal end 11, working end 12, and working end 12 is away from clamping
The diameter of 11 sides is held to be less than the diameter of close 11 side of bare terminal end；
Blade 20, is arranged to multiple, and each blade 20 is uniformly distributed around 12 circumferential lateral surface of working end, each blade 20 by
12 end face of working end extends towards bare terminal end 11, and it is close that each blade 20 includes wedging portion 21, cutting portion 22 and cutting portion 22
Bare terminal end 11 is set, and a row teeth are provided with blade 20 and teeth extend to cutting portion 22 by wedging portion 21, in wedging portion 21
Teeth be the first teeth 31, the teeth on cutting portion 22 are the second teeth 32, and the quantity of the first teeth 31 is 28, the
The quantity of two teeth 32 is eight.
Since in tapping, screw tap is almost embedded in what is cut in workpiece, the machining load of each teeth is than other
Cutter will be big, is easily influenced be subject to temperature caused by tapping, and also teeth on screw tap can be caused with caused chip
Damage.When carrying out tapping to high strength nut using common screw tap, the structure of screw tap is easily damaged, and service life is relatively low, into
And cause nut inner thread precision not high, influence nut follow-up installation and use.
For this reason, the utility model devises a kind of screw tap for tap, by the number of teeth for increasing wedging portion 21（It is long
Degree）, guiding accuracy is improved in tapping production, promotes screw tap accurately to enter nut and carries out tapping；Screw tap can be increased at the same time
20 durability of blade, cutting torsion is more steady, it is advantageously ensured that the final product quality of nut.
Specifically, preferred screw tap is made of the bare terminal end 11 being connected as a single entity with working end 12 in the present embodiment, bare terminal end 11
It is engaged at work with auxiliary work-pieces such as corresponding sleeves, easy to apply active force to screw tap, working end 12 is screwed into nut
Endoporus, diameter of the working end 12 away from 11 side of bare terminal end be less than close to 11 side of bare terminal end diameter, can facilitate screw tap by
Tapping is gradually carried out in inserted num endoporus.
Tapping really cuts nut inner hole by each blade 20 on working end 12 to realize, herein preferably
The quantity of blade 20 is five, and five blades 20 are uniformly distributed around working end 12.
A row teeth are formed by opening up groove on blade 20, each teeth cut endoporus, wherein, each blade
Teeth on 20 are divided into the first teeth 31, the second teeth 32, and part where the first teeth 31 is wedging portion 21, the second teeth
Part is cutting portion 22 where 32, and cutting portion 22 is set close to bare terminal end 11, therefore when screw tap carries out tapping, 21 rate of wedging portion
It is introduced into nut inner hole.
It is noted that preferably the quantity of the first teeth 31 is 28 in the present embodiment, the number of the second teeth 32
Measure as eight, thus the teeth sum on each blade 20 is 36.Relative to original screw tap teeth number, the first teeth
31 and second the quantity of teeth 32 have increase.Wherein, teeth represented in Fig. 1 are a schematic diagram, not by teeth
Quantity is all shown.
First teeth, 31 quantity is more, and wedging portion 21 is longer, is conducive to improve the blade durability of screw tap, it is ensured that cutting is turned round
Power is steady, and the smoothness in internal threads cutting face is higher, and then improves accuracy of thread.Meanwhile the lengthening in wedging portion 21, attacking
Guiding role during tooth is more preferable, easy to screw tap inserted num, can ensure the verticality and beating degree of nut.
In addition, the second teeth 32 increase so that cutting portion 22 lengthens, and the cutting amendment of internal threads is improved, in height
Accuracy of thread is more stablized in fast tapping, further improves the final product quality of nut.
It is teeth sum 36 that whole tap length, which lengthens, so that cutting blade 20 is rational in infrastructure, can be effective
Reduce cutting torsion during tapping, reduce the risk of bursting apart of blade 20, and then improve accuracy of thread；Processing can be improved at the same time
Speed and efficiency, by the structural improvement to screw tap, 20 fevers of blade are relatively small, can be into one in high speed produces
Step prevents the appearance of screw thread burr, avoids the generation of random tooth, increases the service life of screw tap, reduces production cost.
Preferably, on axial cross section, the section of the first teeth 31 is set in quadrangle, and on same blade 20
The top margin of each first teeth 31 is in same straight line.
Wedging portion 21 is actually regarded as setting in frustum, the diameter in wedging portion 21 by away from 22 one end of cutting portion to leaning on
Nearly 22 one end of cutting portion is incremented by, and the actual top of the first teeth 31 is curved structure, and the top surface of each first teeth 31, which is formed, to be eaten
Enter the circumferential lateral surface in portion 21.
Preferably the first teeth 31 are set on axial cross section in quadrangle herein, and the top margin of the first teeth 31 is quadrangle
The top margin in section, the actual straightway sheared for the first teeth 31 by axial plane where rear top surface are each on same blade 20
The straightway of a top surface is in same straight line.Each first teeth 31 are evenly distributed, and the diameter in wedging portion 21 is linearly incremented by, favorably
Nut is gradually embedded in screw tap, tapping effect is good.
Further, on axial cross section, the section setting triangular in shape of the second teeth 32, each on same blade 20
The line at the top of two teeth 32 is set with 10 axial line of body in angle, and the height of the second teeth 32 close to wedging portion 21 is big
In the height of the first adjacent teeth 31.
It is preferred that the section setting triangular in shape of the second teeth 32, the line at each top of second teeth 32 is on same blade 20
For the line on each triangular-section vertex, which intersects setting with 10 axial line of body, and the diameter of cutting portion 22 is leaned on by remote
Nearly 21 one end of wedging portion is equally linearly incremented by away from 21 one end of wedging portion, and such structure setting is on the one hand embedding easy to screw tap
Enter nut and carry out tapping, cut progressively to nut inner hole, on the other hand also can be according to the diameter of required threaded hole
Select the depth of screw tap inserted num endoporus.
Height on cutting portion 22 close to second teeth 32 in wedging portion 21 is more than the height of the first adjacent teeth 31, i.e.,
The distance of the top of second teeth 32 to 10 axial line of body is more than the adjacent top of the first teeth 31 to 10 axial line of body
Distance, easy to the progress of tapping.
Wherein, the cutting position of the first teeth 31 is one of side of each first teeth 31, on same blade 20
Cutting position is consistent, and when rotating screw tap, each blade 20 rotates in the same direction, thus the cutting position on each blade 20 is identical,
Cut when preferably rotating clockwise screw tap herein.
Preferably, chip space 23 is formed between two neighboring blade 20, each chip space 23 is by 20 circular arc of blade
Another adjacent blade 20 is transitted to, the opening direction of each chip space 23 is equal along involute direction around the axial line of body 10
Even distribution.
The quantity of chip space 23 is consistent with 20 quantity of blade, is also five, and 23 quantity of chip space in the present embodiment is opposite
It is more, it can be produced preferably easy to discharge chip during tapping cutting when avoiding that blade 20 is caused to damage, while mitigating work
Heat, blade 20（Teeth）Work is more stablized.
The arc transition between two blades 20 of chip space 23 on the one hand easy to the smooth discharge of chip, is avoided to blade 20
And nut causes to damage, it on the other hand can ensure the structural stability of body 10, it is ensured that product quality.In addition, each chip removal
The opening direction of groove 23 is conducive to the progress of cutwork, strengthens tapping effect along the equally distributed setting in involute direction.
The screw tap that this is used for tap is reasonable in design, by the number of teeth for increasing wedging portion 21（Length）, in tapping
Guiding accuracy is improved in production, promotes screw tap accurately to enter nut and carries out tapping；In addition, the length for increasing wedging portion 21 causes silk
20 durability of blade of cone is more preferable, and cutting torsion is more steady, is conducive to improve the smoothness in internal thread cutting face；At the same time can
Reduce blade 20 to generate heat, avoid the appearance of burr, ensure the quality of tapping.
Described herein is only the preferred embodiment of the utility model, but the scope of protection of the utility model is not
It is confined to this.Modification that the utility model those skilled in the art carries out described specific embodiment or supplement are adopted
Replaced, should all be covered by within the scope of protection of the utility model with similar mode.
Claims (4)
- A kind of 1. screw tap for tap, it is characterised in that including：Body, in rod-shaped setting, body both ends are respectively bare terminal end, working end, and diameter of the working end away from bare terminal end side is small In the diameter close to bare terminal end side；Blade, is arranged to multiple, and each blade is uniformly distributed around working end circumferential lateral surface, and each blade is by working end end face court Extend to bare terminal end, each blade includes wedging portion, cutting portion and cutting portion and set close to bare terminal end, and one is provided with blade Row teeth and teeth extend to cutting portion by wedging portion, and the teeth in wedging portion are the first teeth, and the teeth on cutting portion are the Two teeth, the quantity of the first teeth is 28, and the quantity of the second teeth is eight.
- A kind of 2. screw tap for tap according to claim 1, it is characterised in that on axial cross section, first The section of teeth is set in quadrangle, and the top margin of each first teeth on same blade is in same straight line.
- A kind of 3. screw tap for tap according to claim 2, it is characterised in that on axial cross section, second The section setting triangular in shape of teeth, the line at the top of each second teeth on same blade are set with body axial line in angle Put, and the height of the second teeth close to wedging portion is more than the height of the first adjacent teeth.
- 4. according to a kind of screw tap for tap described in claim 1 or 2 or 3, it is characterised in that two neighboring blade Between form chip space, each chip space is opened by a blade arc transition to another adjacent blade, each chip space The axial line that mouth is directed around body is uniformly distributed along involute direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721202496.6U CN207272352U (en) | 2017-09-19 | 2017-09-19 | A kind of screw tap for tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721202496.6U CN207272352U (en) | 2017-09-19 | 2017-09-19 | A kind of screw tap for tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207272352U true CN207272352U (en) | 2018-04-27 |
Family
ID=61982452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721202496.6U Active CN207272352U (en) | 2017-09-19 | 2017-09-19 | A kind of screw tap for tap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207272352U (en) |
-
2017
- 2017-09-19 CN CN201721202496.6U patent/CN207272352U/en active Active
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