CN201684996U - Right spiral screw tap - Google Patents
Right spiral screw tap Download PDFInfo
- Publication number
- CN201684996U CN201684996U CN2010201732485U CN201020173248U CN201684996U CN 201684996 U CN201684996 U CN 201684996U CN 2010201732485 U CN2010201732485 U CN 2010201732485U CN 201020173248 U CN201020173248 U CN 201020173248U CN 201684996 U CN201684996 U CN 201684996U
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- cutting
- screw tap
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- utility
- cutting cone
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Abstract
The utility model relates to the technical field of threading tool design and manufacture, in particular to a right spiral screw tap. The utility model solves the problems that when the conditional spiral screw tap processes a blind threaded hole, cut scraps are accumulated at the bottom of the blind threaded hole, resulting in thread chasing or tool breaking. In the utility model, a cutting cone is axially and fixedly connected with a tail shank arbor; the cutting cone comprises a cutting part, a calibrate part and an inverted cone part; four right spiral grooves are uniformly distributed on the outer walls of the cutting cone; each spiral groove extends from one end of the cutting cone to the other end thereof; and the swing angle Alpha of the spiral groove ranges from 30 DEG to 40 DEG. The utility model is applied to the processing of blind holes, through holes or threaded holes with interrupted surfaces.
Description
Technical field
The utility model relates to threading tool design and manufacturing technology field, particularly relates to a kind of right-hand screw groove screw tap.
Background technology
In the hole processing technology, commonly used is the straight trough screw tap, but the straight trough screw tap produces short flow chip when thread mill drilling, and smear metal usually is squeezed in screw tap and between the processing screw hole surface, reduces the screw machined surface quality and cause the screw tap tipping.Patent No. ZL 200920067692.6, Granted publication CN 201350532Y, patent name is a kind of spiral fluted tap of chip removal down, and it is smooth and easy that tapping process goes out to consider to be worth doing, and screw tap is frangibility not, but the spiral fluted tap of following chip removal also has its shortcoming, the one, it can only process through hole whorl, and for the blind hole screw thread, smear metal accumulates in the bottom, hole when being worked into thread root, easily cause random button of screw thread or cutter to fracture, the 2nd, resistance to cutting is bigger.
Summary of the invention
The purpose of this utility model is when solving existing spiral fluted tap processing blind hole screw thread, and smear metal accumulates in the bottom, hole, easily causes the disorderly problem that fractures of button or cutter of screw thread, and then a kind of right-hand screw groove screw tap is provided.
The technical solution of the utility model is: the utility model comprises cutting cone and caudal peduncle, described cutting cone and caudal peduncle are affixed vertically, described cutting cone partly is made up of cutting tip, calibrated section and back taper, cutting tip, calibrated section and back taper part fix as one successively, the outer wall of cutting cone is evenly equipped with four right-hand screw grooves, each helicla flute all extends to the other end from an end of cutting cone, and each spiral fluted swing angle is 30 °～40 °.
The utlity model has following beneficial effect: discharge the strip smear metal during right hand helix groove screw tap processing screw hole of the present utility model, but processing blind hole, through hole or interrupted thread surface hole, chip-flowing is controlled easily, chip removal is smooth, can reduce the tapping moment of torsion, reduce resistance to cutting, stable cutting, tapping quality are good, have improved the screw surface quality, have improved the service life and the working (machining) efficiency of screw tap.
Description of drawings
Fig. 1 is a designs simplification schematic diagram of the present utility model; Fig. 2 is a flute profile enlarged drawing of the present utility model; Fig. 3 is that the B of Fig. 1 is to view.
The specific embodiment
The specific embodiment one: a kind of right-hand screw groove screw tap that present embodiment is described in conjunction with Fig. 1 and Fig. 2, it comprises cutting cone 1 and caudal peduncle 2, described cutting cone 1 is affixed vertically with caudal peduncle 2, described cutting cone 1 is made up of cutting tip 1-1, calibrated section 1-2 and back taper part 1-3, cutting tip 1-1, calibrated section 1-2 and back taper part 1-3 fix as one successively, the outer wall of cutting cone 1 is evenly equipped with four right-hand screw grooves, each helicla flute all extends to the other end, each spiral fluted swing angle from an end of cutting cone 1
αIt is 30 °～40 °.What the right-hand screw groove was discharged be the strip smear metal, and upwards discharge of smear metal is suitable for processing blind hole during tapping, and four helicla flutes are the chipping allowance of distributing auger groove screw tap reasonably.
The specific embodiment two: a kind of right-hand screw groove screw tap of present embodiment, the spiral fluted swing angle of described cutting cone 1 are described in conjunction with Fig. 1, Fig. 2 and Fig. 3
αIt is 35 °.The cutting anterior angle
φ is10 °, relief angle is the relief grinding relief angle, and the relief grinding amount is 0.05mm.The screw tap of above-mentioned parameter can make it have good intensity, prolong cutter life, and cutting effect is splendid, and chip removal is smooth and easy, and four strip smear metals of generation are got rid of continuously, and the screwed hole of workpiece can obtain favorable surface quality.Other compositions of present embodiment are identical with the specific embodiment one with annexation.
The specific embodiment three: a kind of right-hand screw groove screw tap that present embodiment is described in conjunction with Fig. 1 and Fig. 2, described cutting tip 1-1 be by the working end end face to the taper shape of calibrated section 1-2 link flaring, the length of cutting tip 1-1 is 2.5 times of pitch d, the cutting angle
βBe 14 ° 4 ' 46 ", described calibrated section 1-2 is a cylinder, and the length of calibrated section 1-2 is 3 times of pitch d, and the back taper amount of back taper part 1-3 is 0.05/100.Back taper part 1-3 play the guiding role, and can reduce resistance to cutting, is beneficial to feed and withdrawing.The cylinder of calibrated section 1-2 can guarantee the screw machining accuracy, the length of cutting tip 1-1 selects 2.5 times of pitch to make this cutter promptly have good machinability, can satisfy the screw thread processing of blind hole again, after calibrating accurately by calibrated section 1-2 again after the cutting tip 1-1 processing, make screw obtain well processed surface and dimensional accuracy.Other compositions of present embodiment are identical with the specific embodiment one or two with annexation.
The specific embodiment four: a kind of right-hand screw groove screw tap of present embodiment, the core diameters of described cutting tip 1-1 are described in conjunction with Fig. 1, Fig. 2 and Fig. 3
φ1 is 18mm, end diameter
φ2 is 32.408mm, and cutting tip 1-1 spiral fluted first radius R 1 is 5.85mm, and second radius R 2 is 10.4mm.The cylindrical of caudal peduncle 2 is connected with tap holder, and square tail is used to transmit moment of torsion.Other compositions of present embodiment are identical with the specific embodiment one, two or three with annexation.
Operation principle of the present utility model is: the utility model is a tapered formula, right hand helix groove structure, during tapping, draw the screwed hole position line earlier, the good thread Pilot hole of drilling again, right-hand screw groove screw tap keeps vertical with working face, screw tap end (less than the screwed hole bottom diameter) introduced in the bottom outlet, along screwed hole axis direction swivel feeding, the strip smear metal is discharged outside the screwed hole along four helicla flutes continuously, lubricating oil in addition during tapping, better effects if, under the situation that does not increase cutting load, one finishes tapping work to cutter smoothly with screwed hole.
Claims (4)
1. right-hand screw groove screw tap, it comprises cutting cone (1) and caudal peduncle (2), described cutting cone (1) is affixed vertically with caudal peduncle (2), it is characterized in that: described cutting cone (1) is made up of cutting tip (1-1), calibrated section (1-2) and back taper part (1-3), cutting tip (1-1), calibrated section (1-2) and back taper part (1-3) fix as one successively, the outer wall of cutting cone (1) is evenly equipped with four right-hand screw grooves, each helicla flute all extends to the other end from an end of cutting cone (1), each spiral fluted swing angle (
α) be 30 °～40 °.
2. a kind of right-hand screw groove screw tap according to claim 1 is characterized in that: the spiral fluted swing angle of described cutting cone (1) (
α) be 35 °.
3. a kind of right-hand screw groove screw tap according to claim 1 and 2, it is characterized in that: described cutting tip (1-1) for by the working end end face to the taper shape of calibrated section (1-2) link flaring, the length of cutting tip (1-1) is 2.5 times of pitch (d), the cutting angle (
β) be 14 ° 4 ' 46 ", described calibrated section (1-2) is a cylinder, and the length of calibrated section (1-2) is 3 times of pitch (d), and the back taper amount of back taper part (1-3) is 0.05/100.
4. a kind of right-hand screw groove screw tap according to claim 3 is characterized in that: the core diameters of described cutting tip (1-1) (
φ1) be 18mm, end diameter (
φ2) be 32.408mm, cutting tip (1-1) spiral fluted first radius (R1) is 5.85mm, and second radius (R2) is 10.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201732485U CN201684996U (en) | 2010-04-28 | 2010-04-28 | Right spiral screw tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201732485U CN201684996U (en) | 2010-04-28 | 2010-04-28 | Right spiral screw tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201684996U true CN201684996U (en) | 2010-12-29 |
Family
ID=43373286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201732485U Expired - Lifetime CN201684996U (en) | 2010-04-28 | 2010-04-28 | Right spiral screw tap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201684996U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470665A (en) * | 2012-07-17 | 2015-03-25 | Osg株式会社 | Spiral tap and manufacturing method therefor |
-
2010
- 2010-04-28 CN CN2010201732485U patent/CN201684996U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104470665A (en) * | 2012-07-17 | 2015-03-25 | Osg株式会社 | Spiral tap and manufacturing method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |