CN104107966A - Four-edge thread forming tap - Google Patents
Four-edge thread forming tap Download PDFInfo
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- CN104107966A CN104107966A CN201310136211.3A CN201310136211A CN104107966A CN 104107966 A CN104107966 A CN 104107966A CN 201310136211 A CN201310136211 A CN 201310136211A CN 104107966 A CN104107966 A CN 104107966A
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- thread forming
- tap
- forming tap
- thread
- edge
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Abstract
The invention relates to a four-edge thread forming tap which comprises a thread forming tap part, a calibration part and a handle. The calibration part is integrally disposed at the rear end of the thread forming tap part. The thread forming tap part and the calibration part are of a straight four-edge structure. The rear end of the calibration part is connected to the handle through a thin neck part. Compared with the prior art, the four-edge thread forming tap has the advantages that the four-edge thread forming tap is of the straight four-edge structure, the strength of the tap is increased while pitch diameter value accuracy of the tap is guaranteed, roughness of machined threaded holes is guaranteed while machining of blind threaded holes can be achieved, the thin neck part is equivalent to a clearance groove and suitable for machining deep hole threads, thread disorder in the threaded holes due to the fact that the tap does not have the clearance groove can be prevented, precision of the threaded holes can be guaranteed, and the machining range of the thread forming tap is increased.
Description
Technical field
The present invention relates to a kind of screw tap, especially relate to a kind of four rib thread forming taps.
Background technology
When screw tap is machining internal thread one of screw tool the most widely, the particularly internal thread in machining small footpath or production in enormous quantities, nearly all adopt tap tapping.Screw tap is to carry out tapping on through drill bit or the manufactured bottom outlet of other instrument, and condition of work is very poor.Should ensure that the large footpath of processed screw, central diameter, pitch, angle of thread and roughness reach the accuracy class of regulation, also require to have higher productivity ratio.And tap tapping is again often last procedure of workpiece, especially tapping on large-scale workpiece, if screw tap fractures, will likely cause whole workpiece to be scrapped, and cause very large economic loss, so require to have again safety guarantee.
Thread forming tap is a kind ofly there is no chip pocket and cutting edge and screw tap with seamed edge.Different from cutting type screw tap, it makes workpiece produce plastic deformation and form internal thread.With after thread forming tap extruding workpiece, screw can not produce enlargement phenomenon conventionally.On the contrary, due to the contraction of metal, the pitch diameter of thread often also reduces to some extent.Simultaneously, as long as it is proper that the geometric parameter of screw tap is selected, there is squeezed light action on screw surface, the precision of screw is also higher, conventionally old mark can reach 2 grades, new mark can reach 5H～6H, and surface roughness can reach Ra3.2～1.6 μ m (machined steel) or Ra1.6～0.8 μ m (processing nonferrous metal and alloy).Thread forming tap is generally used for processing aperture d≤20mm, pitch p≤2mm, the screwed hole of screwed hole length L≤2d.
Summary of the invention
Object of the present invention be exactly a kind of intensity that increases screw tap is provided in order to overcome the defect that above-mentioned prior art exists, ensure screw tap central diameter value accuracy, meet four rib thread forming taps of blind threaded hole processing.
Object of the present invention can be achieved through the following technical solutions:
A kind of four rib thread forming taps, comprise crush cones part, calibrated section and handle, and described calibrated section integrated setting, in the rear end of crush cones part, is characterized in that,
Described crush cones part and calibrated section are straight four jiaos of rib structures, both can increase the intensity of screw tap, can ensure again the accuracy of screw tap central diameter value.
Described calibrated section rear end one venturi portion connecting handle.
Venturi portion is equivalent to undercut, and it is suitable for the processing of deep hole thread, and can prevent because screw tap is without undercut, and the phenomenon of the screwed hole civil strike tooth causing can ensure the precision of screwed hole, and has increased the range of work of thread forming tap.
The 4-5 that the length of described crush cones part is pitch doubly, both can ensure the roughness of processed screwed hole, can meet again the processing in blind threaded hole.
The outside of described calibrated section offers external screw thread.
Compared with prior art, the present invention has the following advantages:
(1) thread forming tap is all changed into straight four rib structures, both can increase the intensity of screw tap, can ensure again the accuracy of screw tap central diameter value.The length of its crush cones part is 4～5 times of pitch, both can ensure the roughness of processed screwed hole, can meet again the processing in blind threaded hole.
(2) venturi portion using is equivalent to undercut, be suitable for the processing of deep hole thread, and can prevent because screw tap is without undercut, and the phenomenon of the screwed hole civil strike tooth causing can ensure the precision of screwed hole, and increase the range of work of thread forming tap.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic diagram of the straight four rib structures of thread forming tap.
In figure, 1 is that crush cones part, 2 is that calibrated section, 3 is that venturi portion, 4 is handle.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of four rib thread forming taps, its structure as shown in Figure 1, comprise crush cones part 1, calibrated section 2 and handle 4, calibrated section 2 integrated setting are in the rear end of crush cones part 1, crush cones part 1 and calibrated section 2 are straight four jiaos of rib structures, as shown in Figure 2, straight four jiaos of rib structures of employing both can increase the intensity of screw tap, can ensure again the accuracy of screw tap central diameter value.The length of crush cones part 1 is 4-5 times of pitch, both can ensure the roughness of processed screwed hole, can meet again the processing in blind threaded hole.The outside of calibrated section 2 offers external screw thread.Calibrated section 2 rear end one venturi portion 3 connecting handles 4.Venturi portion 3 is equivalent to undercut, and it is suitable for the processing of deep hole thread, and can prevent because screw tap is without undercut, and the phenomenon of the screwed hole civil strike tooth causing can ensure the precision of screwed hole, and has increased the range of work of thread forming tap.
Four rib thread forming tap plastic deformations and torque value are slightly large compared with the thread forming tap of three seamed edges, but its measurement is to measure on indicating mcrocalliper with three pins, with the comparison of comparator metering system, its measured value is relatively accurate, therefore thread forming tap is all changed into straight four rib structures, both the intensity of screw tap can be increased, the accuracy of screw tap central diameter value can be ensured again.
Crush cones part is longer, and when tapping, screw tap easily imports, good stability, and the braised rugosity of screw thread being squeezed out is low, but the long tapping moment of torsion increase of crush cones part, screw tap easily fractures.Otherwise crush cones part is shorter, guidance quality is poor, and the precision of screw thread also decreases.Therefore crush cones partial-length L1=4～5P, both can ensure the roughness of processed screwed hole can meet again the processing in blind threaded hole.
Claims (3)
1. four rib thread forming taps, comprise crush cones part, calibrated section and handle, and described calibrated section integrated setting, in the rear end of crush cones part, is characterized in that,
Described crush cones part and calibrated section are straight four jiaos of rib structures,
Described calibrated section rear end one venturi portion connecting handle.
2. a kind of four rib thread forming taps according to claim 1, is characterized in that, the 4-5 that the length of described crush cones part is pitch doubly.
3. a kind of four rib thread forming taps according to claim 1, is characterized in that, the outside of described calibrated section offers external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310136211.3A CN104107966A (en) | 2013-04-18 | 2013-04-18 | Four-edge thread forming tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310136211.3A CN104107966A (en) | 2013-04-18 | 2013-04-18 | Four-edge thread forming tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104107966A true CN104107966A (en) | 2014-10-22 |
Family
ID=51705060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310136211.3A Pending CN104107966A (en) | 2013-04-18 | 2013-04-18 | Four-edge thread forming tap |
Country Status (1)
| Country | Link |
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| CN (1) | CN104107966A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717144A (en) * | 2017-11-06 | 2018-02-23 | 温岭市多宝力工具厂（普通合伙） | A kind of hole processing drill bit |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0004089B1 (en) * | 1978-03-15 | 1981-02-11 | Ernst Reime GmbH & Co. KG Spezialfabrik für Präzisionsgewindeschneidwerkzeuge | Forming tap |
| US4539832A (en) * | 1983-09-19 | 1985-09-10 | Balax, Inc. | Hole sizing tool |
| CN87214769U (en) * | 1987-10-30 | 1988-07-13 | 贾方峥 | An extrusion die with low extruding torsion |
| CN2102814U (en) * | 1991-07-30 | 1992-04-29 | 张家林 | Prismatic screw tap |
| EP0767024A1 (en) * | 1995-10-02 | 1997-04-09 | Tanoi Mfg. Co., Ltd. | Thread forming tap |
| JP2006198685A (en) * | 2005-01-18 | 2006-08-03 | Nachi Fujikoshi Corp | Screw machining tool |
| CN102601466A (en) * | 2012-03-27 | 2012-07-25 | 苏州新凌高强度紧固件有限公司 | Extrusion tap |
| CN202461729U (en) * | 2012-02-21 | 2012-10-03 | 潍柴动力股份有限公司 | Extrusion screw tap |
| CN202539725U (en) * | 2012-03-27 | 2012-11-21 | 常州建华昌盛工具有限公司 | Alloy extrusion screw tap |
| WO2013190700A1 (en) * | 2012-06-22 | 2013-12-27 | オーエスジー株式会社 | Thread-forming tap |
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2013
- 2013-04-18 CN CN201310136211.3A patent/CN104107966A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0004089B1 (en) * | 1978-03-15 | 1981-02-11 | Ernst Reime GmbH & Co. KG Spezialfabrik für Präzisionsgewindeschneidwerkzeuge | Forming tap |
| US4539832A (en) * | 1983-09-19 | 1985-09-10 | Balax, Inc. | Hole sizing tool |
| CN87214769U (en) * | 1987-10-30 | 1988-07-13 | 贾方峥 | An extrusion die with low extruding torsion |
| CN2102814U (en) * | 1991-07-30 | 1992-04-29 | 张家林 | Prismatic screw tap |
| EP0767024A1 (en) * | 1995-10-02 | 1997-04-09 | Tanoi Mfg. Co., Ltd. | Thread forming tap |
| JP2006198685A (en) * | 2005-01-18 | 2006-08-03 | Nachi Fujikoshi Corp | Screw machining tool |
| CN202461729U (en) * | 2012-02-21 | 2012-10-03 | 潍柴动力股份有限公司 | Extrusion screw tap |
| CN102601466A (en) * | 2012-03-27 | 2012-07-25 | 苏州新凌高强度紧固件有限公司 | Extrusion tap |
| CN202539725U (en) * | 2012-03-27 | 2012-11-21 | 常州建华昌盛工具有限公司 | Alloy extrusion screw tap |
| WO2013190700A1 (en) * | 2012-06-22 | 2013-12-27 | オーエスジー株式会社 | Thread-forming tap |
Non-Patent Citations (2)
| Title |
|---|
| 王先逵: "《螺纹加工（机械加工工艺手册：单行本）》", 30 June 2008 * |
| 袁哲俊，刘华明: "《螺纹刀具（金属切削刀具设计手册：单行本）》", 31 July 2009 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107717144A (en) * | 2017-11-06 | 2018-02-23 | 温岭市多宝力工具厂（普通合伙） | A kind of hole processing drill bit |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141022 |