CN103920943B - A kind of screw thread process milling cutter - Google Patents
A kind of screw thread process milling cutter Download PDFInfo
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- CN103920943B CN103920943B CN201310015621.2A CN201310015621A CN103920943B CN 103920943 B CN103920943 B CN 103920943B CN 201310015621 A CN201310015621 A CN 201310015621A CN 103920943 B CN103920943 B CN 103920943B
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- screw thread
- back taper
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- milling cutter
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Abstract
The invention discloses a kind of screw thread process milling cutter, including the cutter body that can rotate around rotation axis, described cutter body includes that cutting portion and shank, described cutting portion self-cutting end face are provided with external diameter back taper to shank.This screw thread process milling cutter have cutting initial procedure relatively steadily, can avoid that cutter relieving impact, screw processing quality be high, the advantage of length in service life.
Description
Technical field
The present invention relates to metal cutting process, particularly relate to a kind of screw thread process milling cutter.
Background technology
Thread milling processing has the biggest advantage compared with conventional threads processing mode in terms of machining accuracy and working (machining) efficiency, and in numerical control milling threaded process, the adjustment extremely convenient to diameter of thread size, versatility is preferable.The screw thread of developed country produces to have compared and has been widely used milling process at present.Screw cutter typically uses spiral interpolation mode to process screw thread, when overhanging longer or part to be processed rigidity deficiency, because of cutter or workpiece rigidity, the impact of cutting resistance, there will be cutter relieving phenomenon, processed screw thread so can be caused to there is tapering, drift unpassable phenomenon when plug thread gauge detects even occurs；It addition, each cutting tooth of screw cutter there will be abrasion non-uniform phenomenon, cutter life is caused to reduce.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, it is provided that a kind of cut initial procedure relatively steadily, can avoid that cutter relieving impact, screw processing quality be high, the screw thread process milling cutter of length in service life.
For solve above-mentioned technical problem, the present invention by the following technical solutions:
A kind of screw thread process milling cutter, including the cutter body that can rotate around rotation axis, described cutter body includes that cutting portion and shank, described cutting portion self-cutting end face are provided with external diameter back taper to shank.
The back taper value M self-cutting end face of described external diameter back taper is gradually increased to shank.
Described external diameter back taper is divided into N section, 2≤N≤4.
Self-cutting end face meets to shank, the back taper value of each section of described external diameter back taper: Mn≤Mn+1,1≤n≤N-1, and M1 > 0.
The back taper value of each section of described external diameter back taper, minimum 0.02/100, it is 1.2/100 to the maximum.
Compared with prior art, it is an advantage of the current invention that:
The screw thread process milling cutter of the present invention, cutting portion self-cutting end face is provided with external diameter back taper to shank, cutter approach workpiece start to cut time, the number of teeth touching workpiece can reduce relatively, so initial stage cutting resistance can be smaller so that cutting initial procedure is relatively steady, along with the carrying out of moving interpolation, incision the number of teeth the most gradually increase, this be in harmonious proportion add man-hour cutter relieving impact；Further, the existence of external diameter back taper reduces the positive cone trend processing screw thread, it is to avoid drift phenomenon only, improves screw processing quality, also reduces the abrasion of cutting tooth simultaneously, extends the service life of screw thread process milling cutter.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of an embodiment of the present invention.
Fig. 2 is the structure for amplifying schematic diagram of cutting portion in Fig. 1.
Fig. 3 is the structural representation of another kind embodiment of the present invention.
Fig. 4 is the screw thread process milling cutter rake wear figure of the present invention.
Fig. 5 is existing normal thread milling cutter processing rake wear figure.
In figure, each label represents:
1, cutter body；2, cutting portion；3, shank；4, cutting end face；5, external diameter back taper.
Detailed description of the invention
Figures 1 and 2 show that a kind of screw thread process milling cutter embodiment of the present invention, this milling cutter includes the cutter body 1 that can rotate around rotation axis, cutter body 1 includes cutting portion 2 and shank 3, cutting portion 2 is provided with helicla flute chip discharging structure, cutting portion 2 self-cutting end face 4 to shank 3 is provided with external diameter back taper 5, cutter approach workpiece start to cut time, the number of teeth more conventional screw thread process cutter tooth number touching workpiece can reduce relatively, so initial stage cutting resistance can be smaller, make to cut initial procedure the most steady, carrying out along with moving interpolation, the number of teeth of incision gradually increases, this be in harmonious proportion add man-hour cutter relieving impact, avoid the appearance of pitch diameter of thread tapering；Further, the existence of external diameter back taper 5 reduces the positive cone trend processing screw thread, it is to avoid drift phenomenon only, improves screw processing quality, also reduces the abrasion of cutting tooth simultaneously, extends the service life of screw thread process milling cutter.
External diameter back taper 5 is divided into N section, 2≤N≤4, self-cutting end face 4 to shank 3, and the back taper value of each section of external diameter back taper 5 meets: Mn≤Mn+1,1≤n≤N-1, and M1 > 0, the back taper value of each section of external diameter back taper 5, minimum 0.02/100, it is 1.2/100 to the maximum.In the present embodiment, overall length L of cutting portion 2 is 11.25mm, and it is divided into L1, L2 and L3 tri-sections, wherein L1=L2=4mm, L3=3.25mm, the external diameter back taper M1 of L1 is 0.2～0.3/100, the external diameter back taper M2 of L2 is 0.4～0.5/100, the external diameter back taper M3 of L3 is 0.6～0.7/100, when cutter approaches workpiece, first it is the number of teeth contact workpiece of L1, L2 with L3 contacts workpiece successively subsequently, so number of teeth of initial stage cutting contact workpiece can reduce relatively, so cutting resistance can more conventional screw thread process milling cutter the most several tooth contact workpiece produce cutting resistance little, carrying out along with moving interpolation, the tooth of incision gradually increases, make to cut initial procedure the most steady.
Fig. 3 shows the embodiment of the another kind of screw thread process milling cutter of the present invention, the present embodiment is essentially identical with a upper embodiment, differing only in the groove chip removal set by cutting portion 2 is straight trough, and back taper value M self-cutting end face 4 to the shank 3 of external diameter back taper 5 is gradually increased, and is faded to 0.07/100 by 0.02/100.
Having above-mentioned advantage for further illustrating the screw thread process milling cutter of the present invention, the existing screw thread process milling cutter by above-mentioned first embodiment and existing normal thread milling cutter are contrast experiment.
Machined material: 38MnVS6, hardness 28～32HRC；
Lathe: TOYODA(horizontal Machining centers)；
Cutting parameter: S=1600r/min, F=500mm/min；
The type of cooling: interior cold, emulsion；Cutter is mended: maximum compensation is 0.07mm；
Screw cutter diameter: 15.8mm；
Screw thread to be processed: M14 × 1.5；
Detecting instrument: ring screw gauge M14 × 1.5-6e, cable diameter gauge in U.S. JOHNSONGAGE；
After two cutters process 160min simultaneously, measure attrition value and the quality of processing screw thread of two screw cutter rake faces.
Fig. 4 is the screw thread process milling cutter rake wear figure of first embodiment of the invention, and Fig. 5 is existing normal thread milling cutter processing rake wear figure.From Fig. 4 and Fig. 5, it can be seen that the screw thread process milling cutter of first embodiment of the invention is from end face to shank bearing of trend, and the abrasion ratio of cutting tooth is more uniform, and abrasion is little compared with existing normal thread milling cutter processing.Analyzing its reason, for during screw thread process, cutter complement value is different, and existing normal thread milling cutter processing is not because of existing external diameter back taper, and the cutting-in of part tooth relatively deeply, causes wearing and tearing bigger.
Detecting processing screw thread, the screw thread process milling cutter processing screw thread of first embodiment of the invention is 0.01mm(the 1st tooth and the 6th tooth thread central diameter difference along cone), and existing normal thread milling cutter processing processing screw thread has reached 0.03mm along cone.
By testing screw cutter service life, when screw thread 390min processed by the screw thread process milling cutter of first embodiment of the invention, all cutting edge even wearings, are 0.015mm along cone；And 0.05mm during existing normal thread milling cutter processing processing screw thread 210min, has been reached along cone.
Therefore, the screw thread process milling cutter of first embodiment of the invention is at processing thread quality and is better than existing normal thread milling cutter processing in terms of service life.
Although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention.Any those of ordinary skill in the art, in the case of without departing from technical solution of the present invention scope, technical solution of the present invention is made many possible variations and modification by the technology contents that all may utilize the disclosure above, or is revised as the Equivalent embodiments of equivalent variations.Therefore, every content without departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should fall in the range of technical solution of the present invention is protected.
Claims (2)
1. a screw thread process milling cutter, including the cutter body (1) that can rotate around rotation axis, described cutter body (1) includes cutting portion (2) and shank (3), it is characterized in that: described cutting portion (2) self-cutting end face (4) is provided with external diameter back taper (5) to shank (3), back taper value M self-cutting end face (4) of described external diameter back taper (5) is gradually increased to shank (3), described external diameter back taper (5) is divided into N section, 2≤N≤4, self-cutting end face (4) is to shank (3), the back taper value of each section of described external diameter back taper (5) meets: Mn≤Mn+1, 1≤n≤N-1, and M1 > 0.
Screw thread process milling cutter the most according to claim 1, it is characterised in that: the back taper value of each section of described external diameter back taper (5), minimum 0.02/100, it is 1.2/100 to the maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015621.2A CN103920943B (en) | 2013-01-16 | 2013-01-16 | A kind of screw thread process milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015621.2A CN103920943B (en) | 2013-01-16 | 2013-01-16 | A kind of screw thread process milling cutter |
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| Publication Number | Publication Date |
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| CN103920943A CN103920943A (en) | 2014-07-16 |
| CN103920943B true CN103920943B (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310015621.2A Active CN103920943B (en) | 2013-01-16 | 2013-01-16 | A kind of screw thread process milling cutter |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107999846B (en) * | 2017-12-29 | 2023-09-08 | 德阳天和机械制造有限责任公司 | Cubic boron nitride internal cooling thread milling cutter capable of removing thread burrs |
| CN113118532B (en) * | 2021-05-20 | 2024-04-09 | 成都戴梦迪超硬工具有限责任公司 | Precision long and short edge PCBN small helix angle end mill for machining thin-wall parts and machining method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87214769U (en) * | 1987-10-30 | 1988-07-13 | 贾方峥 | An extrusion die with low extruding torsion |
| EP0334002B2 (en) * | 1988-03-16 | 2002-09-25 | Prototyp-Werke GmbH | Thread milling cutter |
| CN102294523A (en) * | 2000-02-23 | 2011-12-28 | Tdy工业公司 | Thread milling tool having helical flutes |
| CN203018865U (en) * | 2013-01-16 | 2013-06-26 | 株洲钻石切削刀具股份有限公司 | Thread processing milling cutter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7959381B2 (en) * | 2002-06-13 | 2011-06-14 | Kennametal Inc. | Thread milling tool |
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2013
- 2013-01-16 CN CN201310015621.2A patent/CN103920943B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87214769U (en) * | 1987-10-30 | 1988-07-13 | 贾方峥 | An extrusion die with low extruding torsion |
| EP0334002B2 (en) * | 1988-03-16 | 2002-09-25 | Prototyp-Werke GmbH | Thread milling cutter |
| CN102294523A (en) * | 2000-02-23 | 2011-12-28 | Tdy工业公司 | Thread milling tool having helical flutes |
| CN203018865U (en) * | 2013-01-16 | 2013-06-26 | 株洲钻石切削刀具股份有限公司 | Thread processing milling cutter |
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| CN103920943A (en) | 2014-07-16 |
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