JPS6252658B2 - - Google Patents
Info
- Publication number
- JPS6252658B2 JPS6252658B2 JP57041724A JP4172482A JPS6252658B2 JP S6252658 B2 JPS6252658 B2 JP S6252658B2 JP 57041724 A JP57041724 A JP 57041724A JP 4172482 A JP4172482 A JP 4172482A JP S6252658 B2 JPS6252658 B2 JP S6252658B2
- Authority
- JP
- Japan
- Prior art keywords
- nut
- core
- threaded hole
- cast
- mold
- 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
- 230000013011 mating Effects 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000012805 post-processing Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は鋳造ナツトの表面及び螺条孔部分に鋳
物の黒皮を残した鋳造ナツトの製造法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION ``Industrial Application Field'' The present invention relates to a method for manufacturing a cast nut in which a black crust of the casting is left on the surface and threaded hole portion of the cast nut.
「従来の技術」
従来、ナツトを鋳造法によつて形成する場合、
必然的に合せ面にバリを生ずるためこのバリを切
削する必要があるが、特に螺条孔部分に生じたバ
リを除去することは極めて困難であつて螺条孔全
体を形成し直さなければならない。そのため、螺
条孔を設けない半製品のナツトを鋳造成形し、次
いで、後加工によつて螺条孔を形成している。"Conventional technology" Conventionally, when a nut is formed by a casting method,
Burrs inevitably occur on the mating surfaces, and these burrs must be removed, but it is particularly difficult to remove burrs that occur in the threaded hole area, and the entire threaded hole must be re-formed. . Therefore, a semi-finished nut without a threaded hole is cast and formed, and then the threaded hole is formed by post-processing.
「発明が解決しようとする問題点」
通常、鋳造品の表面には黒皮が形成されている
ので腐食に対して耐久性を有しているが、ナツト
の中心部分に後加工によつて螺条孔を形成すると
黒皮が切除されてしまい、鋳物面が直接表面に露
出して耐腐食性が劣化する。そのため、耐腐食性
の高い鋳造ナツトを用いて長尺に連結したパイプ
を地中に埋設しても、該パイプの連結部分に使用
したナツトの部分から腐食し、耐久性に欠けると
いう問題点を有していた。``Problem to be solved by the invention'' Normally, a cast product has a black crust on its surface, making it resistant to corrosion, but the center part of the nut is not threaded during post-processing. When the holes are formed, the black crust is removed, and the casting surface is directly exposed to the surface, which deteriorates the corrosion resistance. Therefore, even if long pipes connected using highly corrosion-resistant cast nuts are buried underground, there is a problem that the nuts used to connect the pipes corrode and lack durability. had.
「問題点を解決するための手段」
本発明は従来の欠点に鑑みてなされたもので、
外周面に連続して設けたねじ山より高い凸状部
を、該ねじ山に交差させて軸方向にそれぞれ対称
的に形成した中子と、ナツトの中心を通る直線上
に位置した合せ面から二分させてそれぞれ内部に
ナツトの外形をしたキヤビテイ室を有する一対の
ナツト用鋳型とを組み合わせ、このナツト用鋳型
と中子との間のキヤビテイ室内に溶湯を注湯させ
る構成を、上記問題点の解決を図る手段とするも
のである。"Means for Solving Problems" The present invention was made in view of the conventional drawbacks.
A convex portion that is higher than the screw thread that is continuously provided on the outer circumferential surface is formed symmetrically in the axial direction by intersecting the thread, and a mating surface that is located on a straight line passing through the center of the nut. A structure in which a pair of nut molds are combined into two halves and each has a cavity chamber shaped like a nut inside, and molten metal is poured into the cavity chamber between the nut mold and the core is proposed to solve the above problem. It is intended as a means of finding a solution.
「作用」
ナツトの螺条孔をナツトと同時に鋳造成形し、
螺条孔の合せ面から生じたバリを収容する凹入部
を合せ面に沿つてをナツトの内面に設けてあるた
めバリはこの凹入部内におさまり、後加工が不用
となつて螺条孔の内面に黒皮部分を残存させるこ
とができる。``Operation'' The threaded hole of the nut is cast at the same time as the nut.
A recess is provided on the inner surface of the nut along the mating surface to accommodate burrs generated from the mating surface of the threaded hole, so the burr is contained within the recess, eliminating the need for post-processing and improving the shape of the threaded hole. It is possible to leave a black skin part on the inner surface.
「実施例」
本発明の実施例を図面に基づいて説明すると、
鋳造により形成するナツト１０の中心を通る中心
線１１から二分させてナツト用鋳型１２，１２を
それぞれ形成し、この鋳型の内部にナツトの外形
をなすキヤビテイ室１３，１３をそれぞれ形成
し、この鋳型の先端に合せ面１４をそれぞれ形成
してある。"Example" An example of the present invention will be described based on the drawings.
Nut molds 12, 12 are formed by bisecting the center line 11 passing through the center of the nut 10 formed by casting, and cavity chambers 13, 13 having the outer shape of the nut are respectively formed inside these molds. A mating surface 14 is formed at the tip of each.
後記する中子２０の凸状部２４により、鋳造ナ
ツト１０の中心に設ける螺条溝９と接し、且つ、
ナツト用鋳型の合わせ面１４と合致する位置に凹
入部１５をそれぞれ半径方向に形成する。 The convex portion 24 of the core 20, which will be described later, contacts the threaded groove 9 provided at the center of the cast nut 10, and
Recesses 15 are formed in the radial direction at positions that match the mating surfaces 14 of the nut mold.
２０は鋳砂に固形剤を混合させて加圧して形成
した中子で、外周面には螺条孔９を形成するため
のねじ山２１を形成し、且つ、該ねじ山より高い
凸状部２４を該ねじ山２１と交差させて軸方向に
対称的に形成してある。 20 is a core formed by mixing casting sand with a solid agent and pressurizing the mixture, and has a thread 21 for forming a threaded hole 9 on the outer peripheral surface, and a convex portion higher than the thread. 24 are formed to intersect with the thread 21 and are symmetrically formed in the axial direction.
３０はナツト用鋳型の合せ面１４、特に螺条孔
９と接する合せ面１４に生じたバリで、このバリ
３０が螺条孔９内に突出しないように前記凹入部
１５を十分深さに形成してある。 Reference numeral 30 indicates a burr generated on the mating surface 14 of the nut mold, particularly the mating surface 14 in contact with the threaded hole 9, and the recessed portion 15 is formed to a sufficient depth so that the burr 30 does not protrude into the threaded hole 9. It has been done.
次に、本実施例の作用について説明すると、一
対のナツト用鋳型１２，１２の合せ面１４，１４
を合致させ、さらに、このナツト用鋳型の中心部
分に中子２０を配置させた（第２図）後、両者の
間に存するキヤビテイ室１３内へ、鋳型に設けた
湯口（図示せず）から溶湯を注湯することによつ
て鋳造する。 Next, to explain the operation of this embodiment, the mating surfaces 14, 14 of the pair of nut molds 12, 12
After the core 20 is placed in the center of the nut mold (Fig. 2), a sprue (not shown) provided in the mold is inserted into the cavity chamber 13 existing between the two. Cast by pouring molten metal.
この場合、中子２０は砂を固形剤で固形させて
形成してあるので、キヤビテイ室１３内に溶湯を
注湯するとその高熱で固形剤が焼燃し、砂型で形
成した中子２０が崩れて鋳物製品である鋳造ナツ
ト１０をナツト用鋳型１２および中子２０から容
易に取り出すことが出来る。 In this case, the core 20 is formed by solidifying sand with a solid agent, so when molten metal is poured into the cavity chamber 13, the solid agent is burned by the high heat, causing the core 20 formed in the sand mold to collapse. The cast nut 10, which is a cast product, can be easily taken out from the nut mold 12 and the core 20.
「発明の効果」
本発明は以下のような効果を有するものであ
る。"Effects of the Invention" The present invention has the following effects.
ナツトの螺条孔と接する合せ面に生じたバリ
は凹入部内に納まつて螺条孔内には突出しない
ので、バリを取らずにボルトを螺合させても何
等支障となることがない。 The burr that forms on the mating surface of the nut that contacts the threaded hole is contained within the recess and does not protrude into the threaded hole, so there is no problem even if the bolt is screwed together without removing the burr. .
ナツトの螺条孔とボルトの間に塵などが侵入
しても、ボルトを最大180度回転させることに
より塵などを凹入部内に収容でき、黒皮部分の
破損を防止して黒皮の耐久性を高めることがで
きる。 Even if dust gets in between the threaded hole of the nut and the bolt, by rotating the bolt up to 180 degrees, the dust can be contained within the recess, preventing damage to the black skin part and increasing the durability of the black skin. You can increase your sexuality.
螺条孔を形成したり、螺条孔内に生じるバリ
を切削するための後加工を不用にしたため、作
業能率を一段と向上させ、それによつてコスト
ダウンを図ることができる。 Since there is no need for post-processing to form a threaded hole or cut off burrs generated within the threaded hole, work efficiency can be further improved, thereby reducing costs.
図面は本発明の実施例を示すもので、第１図は
鋳造ナツトの平面図、第２図は一対のナツト用鋳
型と中子とを組合わせた状態の平面図、第３図は
第２図Ａ−Ａ線方向断面図、第４図は中子の平面
図、第５図は同正面図、第６図は凹入部内にバリ
が生じた状態の一部拡大した断面図である。
９……螺条孔、１０……鋳造ナツト、１２……
ナツト用鋳型、１３……キヤビテイ室、１４……
合せ面、１５……凹入部、２０……中子、２１…
…ねじ山、２４……凸状部。
The drawings show embodiments of the present invention; FIG. 1 is a plan view of a cast nut, FIG. 2 is a plan view of a pair of nut molds and a core combined, and FIG. 4 is a plan view of the core, FIG. 5 is a front view thereof, and FIG. 6 is a partially enlarged sectional view showing a state in which burrs are formed in the recessed portion. 9...Threaded hole, 10...Cast nut, 12...
Mold for nuts, 13... Cavity chamber, 14...
mating surface, 15... recessed part, 20... core, 21...
...Screw thread, 24... Convex portion.
Claims (1)
部を該ねじ山に交差させて軸方向へそれぞれ対称
的に形成した中子と、ナツトの中心を通る直線上
に位置する合せ面から二分させてそれぞれ内部に
ナツトの外形をしたキヤビテイ室を有する一対の
ナツト用鋳型とを組合わせ、このナツト用鋳型と
中子との間のキヤビテイ室内に溶湯を注湯させる
ことを特徴とする鋳造ナツトの製造法。1. From the core, which is formed symmetrically in the axial direction by intersecting the threads with convex portions higher than the threads provided continuously on the outer circumferential surface, and from the mating surface located on a straight line passing through the center of the nut. Casting characterized by combining a pair of nut molds which are divided into two parts and each having a cavity chamber shaped like a nut inside, and pouring molten metal into the cavity chamber between the nut mold and the core. Nut manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4172482A JPS58160612A (en) | 1982-03-18 | 1982-03-18 | Bolt-nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4172482A JPS58160612A (en) | 1982-03-18 | 1982-03-18 | Bolt-nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58160612A JPS58160612A (en) | 1983-09-24 |
| JPS6252658B2 true JPS6252658B2 (en) | 1987-11-06 |
Family
ID=12616362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4172482A Granted JPS58160612A (en) | 1982-03-18 | 1982-03-18 | Bolt-nut |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58160612A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121060A (en) * | 1983-12-05 | 1985-06-28 | Tokyo Tekko Kk | Production of nut for coupling screw threaded steel bar |
| JP2707176B2 (en) * | 1991-10-25 | 1998-01-28 | コスモ工機株式会社 | Ball valve |
| CN102172770A (en) * | 2011-02-18 | 2011-09-07 | 广西诗美特陶制品有限公司 | Prestressed nut for finished deformed bars and preparation method thereof |
| JP7097550B2 (en) * | 2018-07-04 | 2022-07-08 | 株式会社岡本 | Fixing nuts for threaded reinforcing bars and their manufacturing methods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4938849U (en) * | 1972-07-14 | 1974-04-05 |
-
1982
- 1982-03-18 JP JP4172482A patent/JPS58160612A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58160612A (en) | 1983-09-24 |
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