JPH0262343B2 - - Google Patents
Info
- Publication number
- JPH0262343B2 JPH0262343B2 JP5420286A JP5420286A JPH0262343B2 JP H0262343 B2 JPH0262343 B2 JP H0262343B2 JP 5420286 A JP5420286 A JP 5420286A JP 5420286 A JP5420286 A JP 5420286A JP H0262343 B2 JPH0262343 B2 JP H0262343B2
- Authority
- JP
- Japan
- Prior art keywords
- cap
- insertion hole
- nut body
- nut
- hole
- 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 - Lifetime
Links
- 238000003780 insertion Methods 0.000 claims description 22
- 230000037431 insertion Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 description 7
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/64—Making machine elements nuts
- B21K1/70—Making machine elements nuts of special shape, e.g. self-locking nuts, wing nuts
- B21K1/704—Cap nuts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明はキヤツプ付きハブナツトのナツト本
体の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a nut body of a hub nut with a cap.
（従来技術）
従来自動車等の車両の車輪に取り付けられるハ
ブナツトとしては袋ナツトが多く使用されてお
り、第６，７図に示すようにナツト本体３０とナ
ツト本体３０の軸孔３１を覆うキヤツプ４０とは
熔接３２により一体構造になつている。従つて熔
接工程及び熔接工程に伴なう後処理工程が必要で
ある。(Prior Art) Conventionally, a cap nut is often used as a hub nut to be attached to a wheel of a vehicle such as an automobile, and as shown in FIGS. and are integrally constructed by welding 32. Therefore, a welding process and a post-treatment process accompanying the welding process are necessary.
又第８〜１０図に示すようにナツト本体５０の
六角外周面５２の上部５２ａに周方向の係止溝５
１を切削により設け、キヤツプ６０の下部外形を
ナツト本体５０の六角形と同じ六角形状に形成
し、この六角形状の内側部分に前記ナツト本体５
０の係止溝５１の嵌合可能の突起６１を第１０図
に示すように形成し、ナツト本体５０の係止溝５
１とキヤツプ６０の突起６１とを係合させてキヤ
ツプ６０をナツト本体５０に取り付けているが、
この型式のものは切削工程が必要であり、又キヤ
ツプ６０の六角形状部の内側に突起６１を設ける
ため嵌合部が折損することがあつた。 Further, as shown in FIGS. 8 to 10, a circumferential locking groove 5 is provided in the upper part 52a of the hexagonal outer circumferential surface 52 of the nut body 50.
1 is provided by cutting, the lower outer shape of the cap 60 is formed into the same hexagonal shape as the hexagonal shape of the nut body 50, and the nut body 5 is formed in the inner part of this hexagonal shape.
A protrusion 61 that can be fitted into the locking groove 51 of the nut body 50 is formed as shown in FIG.
1 and the protrusion 61 of the cap 60 are engaged to attach the cap 60 to the nut body 50.
This type requires a cutting process, and since the protrusion 61 is provided inside the hexagonal portion of the cap 60, the fitting portion may break.
さらに第１１図に示すようにナツト本体７０の
内側に周方向の突起７１を設け切削部７２を円筒
状にして製作を容易にしたものもあるが、このも
のは面粗度が悪くキヤツプの圧入時にキヤツプの
爪部の挿入性が悪く析損することがあつた。な
お、先行技術資料として実公昭57−23699号公報
及び実開昭59−194613号公報がある。 Furthermore, as shown in FIG. 11, there is also a nut body 70 with a circumferential protrusion 71 inside the nut body 70 and a cylindrical cutting part 72 to facilitate manufacturing, but this has poor surface roughness and the cap is press-fitted. Occasionally, the cap's claws were difficult to insert, resulting in breakage. In addition, as prior art documents, there are Utility Model Publication No. 57-23699 and Utility Model Application Publication No. 59-194613.
（発明が解決しようとする問題点）
この発明はナツト本体とキヤツプとが別体とし
て製作されキヤツプがナツト本体に嵌着される型
式のキヤツプ付きハブナツトにおいて、ナツト本
体が冷間圧造により成形され、又キヤツプを係止
するためにナツトに設ける係止突起を機械加工に
より成形しないでポンチにより極めて安価、容易
に成形することができ、又キヤツプを取り付けた
際キヤツプ取付部が破損することがなく確実にキ
ヤツプを保持するナツト本体の加工方法の提供を
課題とする。(Problems to be Solved by the Invention) The present invention relates to a hub nut with a cap in which the nut body and the cap are manufactured separately and the cap is fitted into the nut body, and the nut body is formed by cold heading. In addition, the locking protrusion provided on the nut for locking the cap can be formed easily and inexpensively with a punch instead of being formed by machining, and the cap mounting part will not be damaged when the cap is installed, making it reliable. The object of the present invention is to provide a method for processing a nut body that holds a cap.
（問題点を解決するための手段）
上記の課題を解決するためこの発明は冷間圧造
によりナツト本体用素材の外周面を所望のナツト
外形に成形し、キヤツプ挿入孔の外端側からキヤ
ツプ挿入孔より僅かに大径のポンチをキヤツプ挿
入孔の中間部まで打ちこんで中間部に内方に突出
するリング状の係止突起を形成し、成形体の他端
側のキヤツプ挿入孔より小径のねじ下孔をキヤツ
プ挿入孔と同心に成形し、ねじ下孔にはねじ切り
加工を行う工程からなつていある。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention uses cold heading to form the outer peripheral surface of the nut body material into the desired nut outer shape, and inserts the cap from the outer end side of the cap insertion hole. Punch a punch with a diameter slightly larger than the hole to the middle of the cap insertion hole to form a ring-shaped locking protrusion that protrudes inward at the middle, and insert a screw with a smaller diameter than the cap insertion hole on the other end of the molded body. The process consists of forming a pilot hole concentrically with the cap insertion hole, and threading the screw pilot hole.
（作用）
キヤツプを係止する係止突起はキヤツプ挿入孔
の外端側からキヤツプ挿入孔より僅かに大径のポ
ンチをキヤツプ挿入孔の中間部まで打ち込むこと
によりキヤツプ挿入孔の中間部に塑性変形により
形成されるので製作工程は簡単である。(Function) The locking protrusion that locks the cap is plastically deformed in the middle of the cap insertion hole by driving a punch with a slightly larger diameter than the cap insertion hole from the outer end of the cap insertion hole to the middle of the cap insertion hole. The manufacturing process is simple.
（実施例の説明）
以下実施例を示す図面によりこの発明を説明す
る。第１〜３図イ，ロ，ハ，ニはこの発明の一実
施例を示す。同図において１０はナツト本体を示
す。先ずナツト本体１０用の素材を多段打込み工
程を有する冷間圧造機により六角形の外形に成形
し、後述するキヤツプ２０を挿入するための挿入
孔１２を塑性加工する。次に挿入孔１２の直径ｄ
より僅かに大きい直径Ｄを有するポンチ３を挿入
孔１２の外端側から挿入孔１２の中間部１４まで
打ち込み挿入孔１２の壁面を塑性変形させて円形
の係止突起１３を形成するとともにねじ下孔１１
を成形する。この場合Ｄ−ｄの設定は製品に応じ
て決める。この実施例ではＤ−ｄ＝１mmが適当で
ある。さらに次の工程でねじ下孔１１と同径りパ
ンチで打ち抜きを行ないねじ下孔１１をあける。
ねじ下孔１１にはねじ切り加工によりねじ１５が
形成される。(Description of Embodiments) The present invention will be described below with reference to drawings showing embodiments. Figures 1 to 3 A, B, C, and D show an embodiment of the present invention. In the figure, 10 indicates the nut body. First, a material for the nut body 10 is formed into a hexagonal outer shape using a cold heading machine having a multistage driving process, and an insertion hole 12 for inserting a cap 20, which will be described later, is formed by plastic processing. Next, the diameter d of the insertion hole 12
A punch 3 having a slightly larger diameter D is driven from the outer end of the insertion hole 12 to the middle part 14 of the insertion hole 12 to plastically deform the wall surface of the insertion hole 12 to form a circular locking protrusion 13 and to screw down. Hole 11
to form. In this case, the setting of D-d is determined depending on the product. In this embodiment, D-d=1 mm is appropriate. Furthermore, in the next step, punching is performed using a punch having the same diameter as the screw hole 11 to make the screw hole 11.
A thread 15 is formed in the pre-threaded hole 11 by thread cutting.
キヤツプ２０は合成樹脂により一体成形され、
半球状の湾曲部２１とこれに一端部において接続
する円筒部２２と円筒部２２の他端部において外
方に膨出する係止部２３とからなつている。円筒
部２２にはその軸方向に３本のスリツト２４が設
けられている。係止部２３の外径はナツト本体１
０の係止突起１３の内径よりも大きく設定されて
いるのでキヤツプ２０の円筒部２２をナツト本体
１０の挿入孔１２に挿入すると係止部２３は係止
突起１３に当接する。この当接により円筒部２２
はスリツト２４のため軸心方向に弾性変形し係止
部２３は係止突起１３を乗り越えて係止突起１３
に強く弾性係合する。この結果キヤツプ２０はナ
ツト本体１０から脱落することがない。 The cap 20 is integrally molded from synthetic resin.
It consists of a hemispherical curved part 21, a cylindrical part 22 connected to this at one end, and a locking part 23 that bulges outward at the other end of the cylindrical part 22. The cylindrical portion 22 is provided with three slits 24 in its axial direction. The outer diameter of the locking part 23 is the same as the nut body 1.
Since the inner diameter of the locking projection 13 is set larger than the inner diameter of the locking projection 13 of the nut body 10, when the cylindrical portion 22 of the cap 20 is inserted into the insertion hole 12 of the nut body 10, the locking portion 23 comes into contact with the locking projection 13. Due to this contact, the cylindrical portion 22
is elastically deformed in the axial direction due to the slit 24, and the locking portion 23 climbs over the locking protrusion 13 and is attached to the locking protrusion 13.
strongly elastically engages. As a result, the cap 20 will not fall off from the nut body 10.
（発明の効果）
この発明のナツト本体は冷間圧造とポンチとに
より一体成形されているので加工の難しい切削工
程が不用になり、量産性が優れ大幅なコスト低減
を招くことになる。又ナツト本体を切削加工する
とナツト本体の挿入嵌合面の面粗度が悪く樹脂製
キヤツプの挿入性が悪くなつてキヤツプの嵌合部
の折損を引き起すことがあるが、このトラブルも
冷間圧造によるナツト本体の嵌合面の面粗度の向
上によりキヤツプの挿入性が良くなりキヤツプの
嵌合部の折損は皆無になつた。(Effects of the Invention) Since the nut body of the present invention is integrally formed by cold forging and punching, a difficult cutting process is unnecessary, and mass production is excellent, leading to a significant cost reduction. In addition, when the nut body is machined, the surface roughness of the insertion and fitting surface of the nut body becomes poor, making it difficult to insert the resin cap, which may cause breakage of the fitting part of the cap, but this problem can also be caused by cold cutting. The improved surface roughness of the fitting surface of the nut body through forging has improved the ease of inserting the cap, and there has been no breakage of the fitting portion of the cap.
第１図は第２図のＡ−Ａ線断面図、第２図はキ
ヤツプ付きハブナツトの平面図を示す。第３図
イ，ロ，ハ，ニはナツト本体に係止突起を形成す
る工程図を示す。第４図は樹脂製キヤツプの正面
図を示し、第５図は第４図の底面図を示す。第６
図はナツト本体にキヤツプを溶着した従来の袋ナ
ツトの正面図を示し、第７図は第６図のＢ−Ｂ線
断面図を示す。第８図はナツト本体に樹脂製キヤ
ツプを嵌着した従来のキヤツプ付きハブナツトの
正断面図を示し、第９図は第８図の平面図を示
す。第１０図は樹脂製キヤツプの底面図を示す。
第１１図は切削加工による従来のナツト本体の正
断面図を示す。
３……ポンチ、１０……ナツト本体、１１……
ねじ下孔、１２……挿入孔、１３……係止突起、
１４……中間部。
1 is a sectional view taken along the line A--A in FIG. 2, and FIG. 2 is a plan view of the capped hub nut. FIGS. 3A, 3B, 3C and 3D show process diagrams for forming a locking protrusion on the nut body. FIG. 4 shows a front view of the resin cap, and FIG. 5 shows a bottom view of FIG. 4. 6th
The figure shows a front view of a conventional cap nut with a cap welded to the nut body, and FIG. 7 shows a sectional view taken along the line B--B in FIG. 6. FIG. 8 shows a front sectional view of a conventional capped hub nut in which a resin cap is fitted onto the nut body, and FIG. 9 shows a plan view of FIG. 8. FIG. 10 shows a bottom view of the resin cap.
FIG. 11 shows a front sectional view of a conventional nut body after cutting. 3...Ponch, 10...Natsuto body, 11...
Screw pilot hole, 12...insertion hole, 13...locking protrusion,
14...Middle part.
Claims (1)
所望のナツト外形に成形し、この成形体の一端側
にキヤツプ挿入孔を成形し、キヤツプ挿入孔の外
端側からキヤツプ挿入孔より僅かに大径のポンチ
をキヤツプ挿入孔の中間部まで打ち込んで中間部
に内方に突出するリング状の係止突起を形成し、
成形体の他端側にキヤツプ挿入孔より小径のねじ
下孔をキヤツプ挿入孔と同心に成形し、ねじ下孔
にはねじ切り加工を行なうことを特徴とするキヤ
ツプ付きハブナツトのナツト本体の製造方法。1. Form the outer circumferential surface of the nut body material into the desired nut external shape by cold heading, form a cap insertion hole on one end of this molded body, and form a hole slightly larger than the cap insertion hole from the outer end of the cap insertion hole. A punch of the same diameter is driven into the middle part of the cap insertion hole to form a ring-shaped locking protrusion that protrudes inward in the middle part.
A method for manufacturing a nut body of a hub nut with a cap, characterized in that a screw pilot hole with a smaller diameter than the cap insertion hole is formed concentrically with the cap insertion hole on the other end side of the molded body, and the screw pilot hole is threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5420286A JPS62212035A (en) | 1986-03-12 | 1986-03-12 | Manufacture of nut main body of capped hub nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5420286A JPS62212035A (en) | 1986-03-12 | 1986-03-12 | Manufacture of nut main body of capped hub nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62212035A JPS62212035A (en) | 1987-09-18 |
| JPH0262343B2 true JPH0262343B2 (en) | 1990-12-25 |
Family
ID=12963960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5420286A Granted JPS62212035A (en) | 1986-03-12 | 1986-03-12 | Manufacture of nut main body of capped hub nut |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62212035A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026749A (en) * | 2019-05-28 | 2019-07-19 | 嘉兴远信五金科技股份有限公司 | A kind of hollow nut processing technology |
| CN111687370A (en) * | 2020-06-22 | 2020-09-22 | 浙江明泰控股发展股份有限公司 | Forming process and forming device of cap nut |
-
1986
- 1986-03-12 JP JP5420286A patent/JPS62212035A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62212035A (en) | 1987-09-18 |
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