JPS6237612Y2 - - Google Patents
Info
- Publication number
- JPS6237612Y2 JPS6237612Y2 JP1727684U JP1727684U JPS6237612Y2 JP S6237612 Y2 JPS6237612 Y2 JP S6237612Y2 JP 1727684 U JP1727684 U JP 1727684U JP 1727684 U JP1727684 U JP 1727684U JP S6237612 Y2 JPS6237612 Y2 JP S6237612Y2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- taper tap
- tap
- taper
- guide body
- 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
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Moving Of Heads (AREA)
Description
【考案の詳細な説明】
〔考案の利用分野〕
本考案は、機械加工の中でのねじ加工に係り、
テーパタツプを用いて盲栓とかオイルホール等の
ねじ穴を形成する際の当該ねじ穴の真円度不良防
止機構に関する。[Detailed description of the invention] [Field of application of the invention] The invention relates to thread processing in machining.
This invention relates to a mechanism for preventing poor roundness of a screw hole when forming a screw hole such as a blind plug or oil hole using a taper tap.
一般のねじ加工は、被加工物に下穴を開けてお
き、この下穴にタツプを回し入れて先端の喰い付
部の切刃で切削を行ない、続く多数の同径の切刃
がバニシング（burnishing）をしてねじ穴を創成
している。このため、ねじ穴は良孔な加工状態と
なり、ねじ精度も向上する。このとき、前記下穴
の内面の径が創成されたねじ面の山の径と一致す
るように当該ねじ穴が創成される。
In general thread machining, a pilot hole is drilled in the workpiece, a tap is inserted into the pilot hole, and the cutting blade at the tip of the tap is used to cut the tap. burnishing) to create a screw hole. For this reason, the screw hole is machined in a well-finished state, and the screw precision is also improved. At this time, the threaded hole is created so that the diameter of the inner surface of the pilot hole matches the diameter of the crest of the created threaded surface.
これに対して、テーパタツプによるねじ穴加工
は、第１図及び第２図に示した如く、テーパタツ
プ１を被加工物２に予め設けた下穴３に回し入れ
てねじ穴を創成するのであるが、この場合、第３
図に示した如く、下穴３の内面の径と関係なく、
ねじ面の山４と谷５が創成され、また、前記一般
のねじ加工の場合に用いられるタツプのようにバ
ニシング用の切刃が無い状態でねじ穴が創成され
ている。一般にねじ加工は、下穴にならうという
特性があるが、それでも、うまくフローチングし
ないこともあり、下穴と、テーパタツプ１を軸支
しているスピンドル軸との軸芯位置の違いに起因
する真円度不良により、第４図に示した如く花び
ら６が発生するという欠点があつた。この花びら
６はテーパタツプ１が新しい場合は特に顕著であ
り、創成されたねじ穴のシール面としての役割が
果せない場合もある。 On the other hand, in threaded hole machining using a taper tap, as shown in Figs. 1 and 2, a threaded hole is created by inserting the taper tap 1 into a prepared hole 3 prepared in advance in the workpiece 2. , in this case the third
As shown in the figure, regardless of the inner diameter of the pilot hole 3,
The ridges 4 and valleys 5 of the threaded surface are created, and the threaded hole is created without a cutting edge for burnishing like the tap used in the aforementioned general thread processing. In general, thread machining has the characteristic of following the pilot hole, but even so, it may not float properly, and this is due to the difference in the axis position between the pilot hole and the spindle shaft that supports taper tap 1. Due to poor roundness, petals 6 were generated as shown in FIG. 4, which was a drawback. This petal 6 is particularly noticeable when the taper tap 1 is new, and may not function as a sealing surface for the created screw hole.
前記下穴３とスピンドル軸との軸芯をすべての
加工時において一致させることは、予め設けられ
る下穴３の位置のバラツキ等により技術的に極め
て困難である。そこで、テーパタツプ自体の改良
により対処できないかということになる。テーパ
タツプ自体の改良としては、先ず、刃数を多くす
る（第２図における刃数４を５以上に増やす）、
あるいは切刃を周方向に対して不等分割する等が
考えられるが、これらはテーパタツプの製造が困
難となる欠点を有している。また、ネジリリーブ
を小さくすることも考えられるが、これではテー
パタツプの切れ味が悪くなるという欠点がある。 It is technically extremely difficult to align the axes of the pilot hole 3 and the spindle shaft during all machining operations due to variations in the position of the pilot hole 3 provided in advance. Therefore, the question arises whether it is possible to solve this problem by improving the taper tap itself. To improve the taper tap itself, first, increase the number of blades (increase the number of blades from 4 to 5 or more in Figure 2),
Alternatively, it is conceivable to divide the cutting edge unequally in the circumferential direction, but these have the disadvantage that it is difficult to manufacture taper taps. It is also possible to reduce the thread relief, but this has the disadvantage that the taper tap becomes less sharp.
本考案は、上記事情に鑑みなされたもので、テ
ーパタツプと、被加工物に予め設けた下穴との両
軸芯が一致していなくとも、真円度不良による花
びらが発生せず、これにより創成されたねじ穴の
シール性等の性能の低下しないテーパタツプの真
円度不良防止機構を提供するのが目的である。
The present invention was developed in view of the above circumstances, and even if the axes of the taper tap and the pilot hole pre-prepared in the workpiece do not match, petals due to poor roundness will not occur, and as a result, It is an object of the present invention to provide a mechanism for preventing poor roundness of a taper tap without degrading performance such as sealing performance of the created screw hole.
本考案の特徴とするところは、所定位置に固定
されたガイド体の貫通孔にテーパタツプを挿入
し、貫通孔の内面でテーパタツプに設けた被ガイ
ド部の外面を滑動させ、これによりテーパタツプ
の回転位置を被加工物に予め設けられた下穴の位
置のバラツキに影響されずに一定位置に規制する
ようにした点にある。
The feature of the present invention is that a taper tap is inserted into a through hole of a guide body fixed at a predetermined position, and the outer surface of a guided portion provided on the taper tap slides on the inner surface of the through hole, thereby adjusting the rotational position of the taper tap. is regulated to a constant position without being affected by variations in the position of pilot holes previously provided in the workpiece.
以下、本考案を図面の実施例に基いて詳細に説
明する。第５図は本考案に係るテーパタツプの側
面図、第６図は第５図の−線断面図、第７図
は本考案に係る真円度不良防止機構を示す一部切
欠の側面図である。本考案に係るテーパタツプ７
は、その基端側に被ガイド部８が設けられてい
る。この被ガイド部８は、表面滑らかな円柱体よ
り長手方向に複数の逃し部９，９，……を切欠さ
せた構造である。尚、該逃し部９，９，……を設
けず単なる円柱体構造であつてもよい。１０はガ
イド体で、該ガイド体１０は貫通孔１１を有し、
プレート１２に取り付けられ、該プレート１２を
基台１３に固定することにより所定位置に固定さ
れている。該貫通孔１１の内径と前記テーパタツ
プ７の被ガイド部８の外径とは略同一に形成され
ている。
Hereinafter, the present invention will be explained in detail based on the embodiments shown in the drawings. Fig. 5 is a side view of the taper tap according to the present invention, Fig. 6 is a sectional view taken along the line - - of Fig. 5, and Fig. 7 is a partially cutaway side view showing the defective roundness prevention mechanism according to the present invention. . Taper tap 7 according to the present invention
is provided with a guided portion 8 on its proximal end side. The guided portion 8 has a structure in which a plurality of relief portions 9, 9, . . . are cut out in the longitudinal direction from a cylindrical body having a smooth surface. Incidentally, the relief portions 9, 9, . . . may not be provided, and the structure may be a mere cylindrical body. 10 is a guide body, the guide body 10 has a through hole 11,
It is attached to a plate 12 and fixed in a predetermined position by fixing the plate 12 to a base 13. The inner diameter of the through hole 11 and the outer diameter of the guided portion 8 of the taper tap 7 are formed to be substantially the same.
テーパタツプ７は、タツプホルダ１４を介して
スピンドル軸１５に取り付けられている。該スピ
ンドル軸１５は、先端のテーパタツプ７がガイド
体１０の貫通孔１１に挿入し得る位置に固定され
ている。 The taper tap 7 is attached to a spindle shaft 15 via a tap holder 14. The spindle shaft 15 is fixed at a position where the taper tap 7 at the tip can be inserted into the through hole 11 of the guide body 10.
ガイド体１０の背面側には、被加工物２がクラ
ンプ１６により基台１３上に載置固定されてい
る。該被加工物２には予め下穴３が設けられてい
るが、その位置は前記ガイド体１０の貫通孔１１
と対面する位置である。 On the back side of the guide body 10, a workpiece 2 is mounted and fixed on a base 13 by a clamp 16. A pilot hole 3 is previously provided in the workpiece 2, and its position is similar to the through hole 11 of the guide body 10.
This is the position where you are facing the person.
次に、第７図を参照して作用を説明する。ガイ
ド体１０の貫通孔１１にテーパタツプ７を挿入し
スピンドル軸１５を回転させて該貫通孔１１の内
面で前記テーパタツプ７に設けた被ガイド部８の
外面を滑動させ、これにより当該テーパタツプ７
の回転位置を規制しつつ、下穴３内に新たにねじ
穴を創成する。 Next, the operation will be explained with reference to FIG. The taper tap 7 is inserted into the through hole 11 of the guide body 10, and the spindle shaft 15 is rotated to cause the outer surface of the guided portion 8 provided on the taper tap 7 to slide on the inner surface of the through hole 11, thereby causing the taper tap 7 to slide.
A new screw hole is created in the prepared hole 3 while regulating the rotational position of the hole.
本考案によれば、所定位置に固定されたガイド
体の貫通孔にテーパタツプを挿入し、該貫通孔の
内面でテーパタツプに設けた被ガイド部の外面を
滑動させ、これにより当該テーパタツプの回転位
置を一定位置に規制するようにしたので、被加工
物に予め設けられた下穴の位置のバラツキによ
り、テーパタツプと下穴の両軸芯位置が一致して
いなくとも、従来のような真円度不良による花び
らが発生しない。この結果、創成されたねじ穴の
シール性等の性能も低下しない。
According to the present invention, a taper tap is inserted into a through hole of a guide body fixed at a predetermined position, and the outer surface of a guided portion provided on the taper tap slides on the inner surface of the through hole, thereby controlling the rotational position of the taper tap. Since the position is regulated to a fixed position, even if the axes of the taper tap and the pilot hole do not match due to variations in the position of the pilot hole pre-prepared in the workpiece, there is no possibility of poor roundness as in the conventional method. Due to the petals do not occur. As a result, performance such as sealing performance of the created screw hole does not deteriorate.
第１図は従来例を示す一部切欠の側面図、第２
図は第１図の−線断面図、第３図は従来のテ
ーパタツプにより創成されたねじ穴の断面図、第
４図は第３図の−線断面図、第５図は本考案
に係るテーパタツプの側面図、第６図は第５図の
−線断面図、第７図は本考案に係る真円度不
良防止機構を示す一部切欠の側面図である。
７……テーパタツプ、８……被ガイド部、１０
……ガイド体、１１……貫通孔。
Figure 1 is a partially cutaway side view showing a conventional example;
The figures are a cross-sectional view taken along the - line in Fig. 1, Fig. 3 is a cross-sectional view of a screw hole created by a conventional taper tap, Fig. 4 is a cross-sectional view taken along the - line in Fig. 3, and Fig. 5 is a cross-sectional view taken along the - line in Fig. 5. 6 is a sectional view taken along the line -- in FIG. 5, and FIG. 7 is a partially cutaway side view showing the defective roundness prevention mechanism according to the present invention. 7... Taper tap, 8... Guided part, 10
... Guide body, 11 ... Through hole.
Claims (1)
設け、貫通孔を有するガイド体を所定位置に固定
し、該ガイド体の貫通孔に前記テーパタツプを挿
入し、該貫通孔の内面で前記被ガイド部の外面を
滑動させることにより該テーパタツプの回転位置
を規制するようにしたことを特徴とするテーパタ
ツプの真円度不良防止機構。 A guided part during rotation is provided on the base end side of the taper tap, a guide body having a through hole is fixed in a predetermined position, the taper tap is inserted into the through hole of the guide body, and the guided part is inserted into the inner surface of the through hole. 1. A mechanism for preventing poor roundness of a taper tap, characterized in that the rotational position of the taper tap is regulated by sliding the outer surface of the taper tap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1727684U JPS60131327U (en) | 1984-02-09 | 1984-02-09 | Taper tap out-of-roundness prevention mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1727684U JPS60131327U (en) | 1984-02-09 | 1984-02-09 | Taper tap out-of-roundness prevention mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60131327U JPS60131327U (en) | 1985-09-03 |
| JPS6237612Y2 true JPS6237612Y2 (en) | 1987-09-25 |
Family
ID=30504830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1727684U Granted JPS60131327U (en) | 1984-02-09 | 1984-02-09 | Taper tap out-of-roundness prevention mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60131327U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010214517A (en) * | 2009-03-16 | 2010-09-30 | Osg Corp | Taper thread tap for pipe |
-
1984
- 1984-02-09 JP JP1727684U patent/JPS60131327U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60131327U (en) | 1985-09-03 |
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