JPS5949131B2 - Tapping method - Google Patents
Tapping methodInfo
- Publication number
- JPS5949131B2 JPS5949131B2 JP15999881A JP15999881A JPS5949131B2 JP S5949131 B2 JPS5949131 B2 JP S5949131B2 JP 15999881 A JP15999881 A JP 15999881A JP 15999881 A JP15999881 A JP 15999881A JP S5949131 B2 JPS5949131 B2 JP S5949131B2
- Authority
- JP
- Japan
- Prior art keywords
- tap
- thread groove
- chamfer
- hole
- cutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
Description
【発明の詳細な説明】
本発明は貫通孔または盲穴にねじを形成するためのクツ
ピング工作法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clipping process for forming threads in through holes or blind holes.
第１図ａ ＝ ｄに基づいてクツピング工作法の概略を
説明すると、まずａに示すとさく、被加工物１にドリル
２で孔３を開ける。The outline of the chopping method will be explained based on FIG.
次にｂに示すごとく孔３の開口部にカッター４でチャン
ファ５を形成し、次にＣに示すごとく２番タップ６で上
記孔３にねじ溝７を形成した後、ｄに示すご吉く３番タ
ップ８て上記ねじ溝７を仕上げている。Next, as shown in b, a chamfer 5 is formed at the opening of the hole 3 with a cutter 4, and then a thread groove 7 is formed in the hole 3 with a No. 2 tap 6 as shown in c, and then a chamfer 5 is formed in the opening of the hole 3 as shown in d. The thread groove 7 is finished using the No. 3 tap 8.
ところで従来では、ドリルで孔のかえりおよびねじ山に
よるかえりを防止するため、チャンファ角αが４５°前
後のチャンファ５を形成している。Conventionally, the chamfer 5 is formed with a chamfer angle α of about 45° in order to prevent burrs in holes caused by a drill and burrs caused by threads.
一方、３番タップ８のくいつき角βは通常２４°である
から、３番タップ８とチャンファ５とは点接触すること
になる。On the other hand, since the sticking angle β of the third tap 8 is normally 24°, the third tap 8 and the chamfer 5 come into point contact.
したがってＡＴＣ（自動工具交換機構）をもったＮＣ工
作機により完全自動でねじ加工しようとした場合、第２
図ａ−ｄに示すごきく３番タップ８の先端がチャンファ
５に当たると、小さな推力で、そのままくい込み、ねじ
山が二重に形成されるおそれがある。Therefore, if you try to machine a screw completely automatically using an NC machine tool that has an ATC (automatic tool change mechanism), the second
When the tip of the No. 3 tap 8 shown in Figures a to d hits the chamfer 5, it will bite into the chamfer 5 with a small thrust, and there is a risk that a double thread will be formed.
故に従来では作業員がいちいち手作業で３番タップ８と
ねじ溝７との位相合わせをしているが、これでは非能率
であり、ＡＴＣをもったＮＣ工作機の完全自動化の大き
な障害となっている。Therefore, in the past, workers manually aligned the phase between the No. 3 tap 8 and the thread groove 7, but this was inefficient and became a major obstacle to the complete automation of NC machine tools equipped with ATC. ing.
そこで本発明はかかる問題点を解消したタッピング工作
法を提供するものである。Therefore, the present invention provides a tapping method that solves these problems.
以下、本発明の一実施例を第３図ａ ＝ ｄに基づいて
説明する。Hereinafter, one embodiment of the present invention will be described based on FIG. 3 a = d.
すなわち孔３の開口部に、３番タップ８のくいつき角β
と同一角度αのチャンファ５を形成し、次に２番タップ
６で上記孔３にねじ溝７を形成した後、３番タップ８で
上記ねじ溝７を仕上げるものである。In other words, the engagement angle β of No. 3 tap 8 at the opening of hole 3
A chamfer 5 having the same angle α is formed, and then a thread groove 7 is formed in the hole 3 with a No. 2 tap 6, and then the thread groove 7 is finished with a No. 3 tap 8.
この場合、チャンファ５と３番タップ８の切刃とは線接
触となり、少々の推力では３番タップ８が進まず、ねじ
山が二重に形成されるのが防止される。In this case, the chamfer 5 and the cutting edge of the No. 3 tap 8 are in line contact, and the No. 3 tap 8 does not advance even with a small thrust, thereby preventing the formation of double threads.
上記チャンファ５の形成は、第１図すに示すようなカッ
ター４でおこなってもよいし、第４図に示すごとくドリ
ル２に円筒状カッター９を外嵌固定して、ドリル２によ
る孔３の形成につづいてカッター９によりチャンファ５
を形成するようにし。The chamfer 5 may be formed by using a cutter 4 as shown in FIG. 1, or by fitting and fixing a cylindrical cutter 9 to the drill 2 as shown in FIG. Following formation, chamfer 5 is cut by cutter 9.
so that it forms.
てもよい。It's okay.
以−１−述べたごとく本発明のタッピング工作法によれ
ば、所定孔の開口部に、カッターでねじ溝什−上げ用タ
ップのくいつき角と同一角度のチャンファを形成し、次
にねじ溝形成用タップで上記孔にねじ溝を形成した後、
ねじ溝仕上げ用タップで上記ねじ溝を仕上げるものであ
るから、ねじ溝仕上げ用タップの先端はチャンファに線
接触することになり、従来のようにタップの先端がくい
込んでねじ山が二重に形成されることはない。As described above, according to the tapping method of the present invention, a chamfer is formed at the opening of a predetermined hole using a cutter at the same angle as the tapping angle of the tap for raising the thread groove, and then the thread groove is formed. After forming a thread groove in the above hole with a tap,
Since the above-mentioned thread groove is finished with a thread groove finishing tap, the tip of the thread groove finishing tap comes into line contact with the chamfer, and unlike conventional taps, the tip of the tap digs in and forms a double thread. It will not be done.
したがってＡＴＣをもったＮ ｃ工作機により完全自動
でねじ加工することができるものである。Therefore, screws can be machined completely automatically using an Nc machine tool equipped with an ATC.
第１図はタッピング工作法の手順を示す概略説明図、第
２図ａ ＝ ｄは従来例を示すタップ入口部の拡大縦断
面図であって、９０°ごとに縦断面した状態を示す。
第３図ａ〜ｄは本発明の一実施例を示すタップ入口部の
拡大縦断面図であって、９００ごとに縦断面した状態を
示す。
第４図はカッターの変形例を示す概略説明図である。
１・・・・・・被加工物、３・・・・・・孔、４，９・
・・・・・カッター、５・・・・・・チャンファ、６・
・・・・・２番タップ（ねじ溝形成用タップ）、７・・
・・・・ねじ溝、８・・・・・・３番タップ（ねじ溝什
−トげ用タップ）、α・・・・・・チャンファ角、β・
・・・・・くいつき角。FIG. 1 is a schematic explanatory diagram showing the steps of the tapping method, and FIG. 2 a = d is an enlarged vertical cross-sectional view of the tap entrance section showing a conventional example, showing a vertical cross-section at every 90°. 3A to 3D are enlarged vertical cross-sectional views of a tap inlet portion showing one embodiment of the present invention, and show vertical cross-sections at intervals of 900. FIG. 4 is a schematic explanatory diagram showing a modification of the cutter. 1... Workpiece, 3... Hole, 4, 9.
... Cutter, 5 ... Chamfer, 6.
...No. 2 tap (tap for thread groove formation), 7...
...Thread groove, 8...Tap No. 3 (tap for thread groove - thorn), α...Chamfer angle, β.
...Bound angle.
Claims (1)
プのくいつき角と同一角度のチャンファを形成し、次に
ねじ溝形成用タップで上記孔にねじ溝を形成した後、ね
じ溝仕上げ用タップで上記ねじ溝を仕上げることを特徴
とするクツピング工作法。1 Form a chamfer at the opening of the specified hole with a cutter at the same angle as the cutting angle of the thread groove finishing tap, then use the thread groove forming tap to form a thread groove in the hole, and then use the thread groove finishing tap. A clipping method characterized by finishing the above-mentioned thread groove with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15999881A JPS5949131B2 (en) | 1981-10-06 | 1981-10-06 | Tapping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15999881A JPS5949131B2 (en) | 1981-10-06 | 1981-10-06 | Tapping method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5859732A JPS5859732A (en) | 1983-04-08 |
| JPS5949131B2 true JPS5949131B2 (en) | 1984-11-30 |
Family
ID=15705759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15999881A Expired JPS5949131B2 (en) | 1981-10-06 | 1981-10-06 | Tapping method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5949131B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504025B (en) * | 2009-03-12 | 2013-07-31 | 贾灯喜 | Manufacturing method of double-thread fastener |
| CN109794771B (en) * | 2019-03-29 | 2023-06-06 | 重庆四通机械科技有限公司 | Cushion block machining tool seat and cushion block machining process |
-
1981
- 1981-10-06 JP JP15999881A patent/JPS5949131B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5859732A (en) | 1983-04-08 |
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