CN2150003Y - Cutting-extruding combined tap - Google Patents
Cutting-extruding combined tap Download PDFInfo
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- CN2150003Y CN2150003Y CN 93225175 CN93225175U CN2150003Y CN 2150003 Y CN2150003 Y CN 2150003Y CN 93225175 CN93225175 CN 93225175 CN 93225175 U CN93225175 U CN 93225175U CN 2150003 Y CN2150003 Y CN 2150003Y
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- cutting
- extruding
- tooth
- tap
- cogs
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Abstract
The utility model provides a cutting and extruding combined tap, comprising a cutting part, an extruding part and a taper shank. The utility model is provided with cutting tap cogs, cutting correction cogs, transition grooves and extruding tap cogs. Extruding correction cogs and the taper shank are arranged in order, the cutting part is provided with a chip flute, and the extruding part is provided with an oil containing groove. The utility model integrates cutting and extrusion as an entity and has one-step forming for tapping, little load for machining, small torque, low temperature rise, high speed, high precision, favorable surface smoothness and high durability, and the utility model can be used for machining field such as petroleum, chemical engineering, nuclear power, boiler, military industry, aerospace, transportation machinery, etc., particularly showing superiority for machining nuts with high fatigue resistance.
Description
The utility model relates to a kind of cutting extruding combined tap and drill, and belonging to and collecting the cutting squeeze function in the screw thread cutting tool is a kind of NEW TYPE OF COMPOSITE screw tap of one.
In machining, nut and other thread tapping are extremely common and operation widely, and generally all adopt cut tap processing.As in the petroleum machinery industry, the processing of rod collar now all adopts machine to process with cut tap.But rod collar is in adopting cut tap processing, because rotating speed is low, middle footpath size is easily expanded, though physical dimension, precision reach requirement, its fatigue resistance, surface roughness still do not reach the requirement of regulation.And the cut tap life-span is low, and tools expenditures is big, and working (machining) efficiency is low, the production cost height.Along with the development of China Petroleum, the rod collar demand is big.At present, the specification requirement of domestic rod collar, all with reference to the international standard of the API of American Petroleum Institute " sucker rod and box cupling ", just higher to the requirement of the anti-mechanical fatigue strength of box cupling.Domestic, once the someone designed and a kind ofly carried out box cupling processing with full thread forming tap, because load is heavy when work, moment of torsion is big, temperature rise is higher for full thread forming tap, workpiece needs bigger clamping force, the labor intensity of operating staff height, again can't reconditioning behind the tool wear reuse, have in addition when work, twist off, influence personal safety.Thereby, pressing in the petroleum machinery processing industry to seek and a kind ofly can solve rod collar screw thread fatigue resistance height, surface smoothness is good, can enhance productivity a kind of thread tapping instrument of high durability again.
At industries such as petroleum machinery processing to box cupling, or a difficult problem to existing in the nut processing that special fatigue resistance requirement is arranged, for overcoming existing cut tap and the above-mentioned deficiency of thread forming tap, the utility model aims to provide a kind of fatigue resistance that can solve screw thread, surface smoothness is good, can enhance productivity and have higher durability again, the uncomplicated again cutting extruding of instrument manufacturing combined tap and drill.
The utility model is to realize its purpose by the following technical solutions.
The screw thread pair of petroleum sucker rod box cupling and tool fatigue resistance nut, under the situation of dead load, mechanical performance all reaches the requirement of regulation.But box cupling screw thread and the screw thread that requires the fatigue resistance nut effect of varying load that circulated in actual the use, fatigue failure is its principal mode.Internal thread with machine tap processing, differ greatly at top layer microcosmos geometric shape and physical property, the residual stress direction, the size distribution inequality, and under the alternation tensile load, the dental groove slot part stress of screw thread is the most concentrated, be weakest link, usually also right over there produce tired micro-crack, extend to material internal gradually, expand and the generation fracture failure.
Improve the fatigue resistance on top layer, at first solve suface processing quality, utilize residual stress, resisting fatigue stress, the root geometry of change dental groove groove changes flat dental groove into the circular arc dental groove, disperses concentrated stress.The cyclic test result of English thread bolt proves, its fatigue limit is than the high 20%(of fatigue limit " influence of screw-tjread system fabrication technique and major parameter double thread linking intensity " of flat dental groove bolt ［ Soviet Union ］ AN Ya Gushe also husband's work, China Machine Press 65 years).Use hardness, intensity and wearability that cold extruding technique improves machined surface, promptly chill phenomenon is improved the serviceability of part.Because percentage elongation δ＞5% of plastic metal material, its polycrystalline materials that belong to more, under external force, the inner and intercrystalline distortion of material generation crystal grain, and intercrystalline distortion can destroy the integrality of intercrystalline border and metal, the most important reason that metal is destroyed.And tension can be aggravated this destruction, and compression can stop multicrystal intercrystalline distortion, prevents that metal from destroying.Compression makes metal lattice organize densification more simultaneously, micro-damage even macroscopical destruction can be remedied, the influence that compression also can make the stress that field trash caused of metal inside concentrate reduces, and tension antithesis, and this explanation extrusion stress can improve the plasticity of material greatly.
Load is heavy during full thread forming tap work, and moment of torsion is big, and temperature rise is easy to wear, mainly is because amount of compression is excessive, the metal extruding flowing space sometimes even enclosed takes place, and the plug that rises twists off screw tap, the resilience amount of contraction of workpiece is also bigger, is difficult for grasping.Employing cuts a part of dental groove metal level, the technical scheme that a part is pushed again, and carried out lot of experiment validation, designed a kind of cutting extruding combined tap and drill.
Cutting extruding combined tap and drill partly is made up of cutting tip, crimping section and taper shank.Cutting cone tooth, cutting proofread and correct tooth, lead-over groove, crush cones tooth, extruding proofread and correct tooth and taper shank in regular turn structure be one to have the composite construction of cutting extruding dual-use function, have chip pocket at cutting tip, crimping section has the appearance oil groove.Its structure is as shown in drawings:
Accompanying drawing 1: a kind of structural representation that cuts the extruding combined tap and drill.
Accompanying drawing 2: a kind of cutting extruding combined tap and drill A-A profile.
Accompanying drawing 3: a kind of cutting extruding combined tap and drill B-B profile.
Accompanying drawing 4: I place partial enlarged drawing.
Satisfying under the petroleum sucker rod box cupling intensity instructions for use condition, adopting the cutting-extruding combined tap machining internal thread that its distinguishing feature is arranged:
1, integrate the cutting extruding, cutting speed is fast, the formed precision height, and rough surface is good, and the tapping one-shot forming has been removed the second tap, three of screw tap from and has been attacked, and can reface after the cutting tip wearing and tearing and continue to use, and durability significantly improves, long service life. Load is light during cutting-extruding combined tap work, moment of torsion is littler, and temperature rise is low, and workpiece surface roughness reaches Ra0.8-1.6, and precision reaches the 6H level usually, the fatigue resistance height, all workpiece flow harden layer thicknesses are stable, uniformity, make the workpiece mechanical performance more consistent, springback capacity is little, steady quality.
2, the design of all size of cutting-extruding combined tap is easy, simple in structure, easily makes. Former tool production producer manufacturing equipment is constant, need not invest, and the cost of original production does not increase basically, and is close with original die hob profile physical dimension, and versatility is good, and tool materials are constant. But the top layer is coating TiC or TiN coating still, and effect is better.
Cutting-extruding combined tap is a kind of novel high speed, efficient machining internal thread cutting element, its can be widely used in oil, chemical industry, nuclear power, boiler, military project, space flight, The field of machining such as shipbuilding, automobile, tractor, railway locomotive, mining machinery, engineering have the nut processing of the important events of high-fatigue strength especially to use, widely prospect of the application is arranged.
Do the introduction of an embodiment below in conjunction with accompanying drawing.
A kind of cutting extruding combined tap and drill, it mainly contains cutting tip, crimping section and taper shank and partly forms.It comprises: tooth 2, lead-over groove 3, crush cones tooth 4, extruding correction tooth 5, taper shank 6, taper shank side's tenon 7 are proofreaied and correct in cutting cone tooth 1, cutting.The diameter of screw tap can be set in the 10-50mm scope, and pitch can be selected the metric system or very little system for use.Cutting teeth is made up of cutting cone tooth 1 and cutting correction tooth 2, and their screwed hole that guarantees preprocessing that act as has a stable amount of compression.The tooth number Z that tooth 2 is proofreaied and correct in cutting cone tooth 1 and cutting
1=3-8 tooth, cutting cone land inclination angle λ=0 °-15 °, cone angle Φ
1=1 ° 30 '-8 °, the chip pocket of cutting teeth portion, back-off amount K
1Reach determining of each parameter, mainly according to the material of part to be processed, machining screw diameter and pitch are determined.Cutting tip designing requirement screw tap metal when work is whittled into rouleau bits shape, discharges downwards.The end of screw thread, directly determined very important, can adjust by calculating and experiment.The width i=(1-3 of lead-over groove 3) P does not interfere extruding tooth portion man-hour to guarantee that chip pocket adds.The tooth number Z that tooth 5 is proofreaied and correct in crush cones tooth 4 and extruding
2=3-8 tooth, Φ
2=1 ° 30 '-10 °, hold oil groove R
1With extruding tooth top R
2Really normal root is according to part material and the diameter of thread, pitch, part specification requirement and decide K
2The back-off amount is according to Z
2Determine.The extruding tooth can be designed to spirality ω=15 °-30 ° equally, decides as required.For quality and the cutter instructions for use after the extrusion modling of assurance part to be processed,, adopt extreme pressure lublicating oil and " doubly resisting grinding agent strenuously " additive configuration fluid effect better according to experiment confirm.The operating rate of cutting extruding combined tap and drill can reach 17-23.5m/min, and the contour length size is close with the standard machine tap, and shank length is determined according to the length of part screwed hole.
Claims (4)
1, a kind of cutting extruding combined tap and drill, it partly is made up of cutting tip, crimping section and taper shank, it is characterized in that cutting cone tooth 1, cutting proofread and correct tooth 2, lead-over groove 3, crush cones tooth 4, extruding proofread and correct tooth 5 and taper shank 6 in regular turn structure be one to have the composite construction of cutting extruding dual-use function, have chip pocket at cutting tip, crimping section has the appearance oil groove.
2, according to the described a kind of cutting extruding combined tap and drill of claim 1, it is characterized in that the tooth number Z that tooth 2 is proofreaied and correct in cutting cone tooth 1 and cutting
1=3-8 tooth, cutting cone land inclination angle λ=0 °-15 °, cone angle Φ
1=1 ° 30 '-8 °, back-off amount K
1Difference with the cutting tip diameter of thread, pitch and part to be processed material changes.
3, according to the described a kind of cutting extruding combined tap and drill of claim 1, it is characterized in that the tooth number Z that tooth 5 is proofreaied and correct in crush cones tooth 4 and extruding
2=3-8 tooth, cone angle Φ
2=1 ° 30 '-10 °, extruding tooth ω=15 °-30 ° holds oil groove and extruding tooth top with the crimping section diameter of thread, the difference of pitch and part to be processed material and changing.
4, according to claim 1,2,3 described a kind of cutting extruding combined tap and drills, it is characterized in that diameter is 10-50mm, pitch can be selected the metric system or very little system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93225175 CN2150003Y (en) | 1993-02-17 | 1993-02-17 | Cutting-extruding combined tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93225175 CN2150003Y (en) | 1993-02-17 | 1993-02-17 | Cutting-extruding combined tap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2150003Y true CN2150003Y (en) | 1993-12-22 |
Family
ID=33803038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93225175 Expired - Fee Related CN2150003Y (en) | 1993-02-17 | 1993-02-17 | Cutting-extruding combined tap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2150003Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284321B (en) * | 2007-04-09 | 2010-09-29 | 陈�胜 | Combination screw tap and manufacturing method thereof |
| CN103846508A (en) * | 2012-12-01 | 2014-06-11 | 中国航空工业标准件制造有限责任公司 | Composite type screw tapper for threading machine |
| CN108637619A (en) * | 2018-08-08 | 2018-10-12 | 扬州江宇刃具有限公司 | Screw tap moulding process |
-
1993
- 1993-02-17 CN CN 93225175 patent/CN2150003Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101284321B (en) * | 2007-04-09 | 2010-09-29 | 陈�胜 | Combination screw tap and manufacturing method thereof |
| CN103846508A (en) * | 2012-12-01 | 2014-06-11 | 中国航空工业标准件制造有限责任公司 | Composite type screw tapper for threading machine |
| CN108637619A (en) * | 2018-08-08 | 2018-10-12 | 扬州江宇刃具有限公司 | Screw tap moulding process |
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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 |