JP4291916B2 - Toothed ring and method for forming convex teeth thereof - Google Patents

Toothed ring and method for forming convex teeth thereof Download PDF

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Publication number
JP4291916B2
JP4291916B2 JP14363299A JP14363299A JP4291916B2 JP 4291916 B2 JP4291916 B2 JP 4291916B2 JP 14363299 A JP14363299 A JP 14363299A JP 14363299 A JP14363299 A JP 14363299A JP 4291916 B2 JP4291916 B2 JP 4291916B2
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Prior art keywords
convex
concave
teeth
recess
flange portion
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JP2000334527A (en
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美憲 長井
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Press Kogyo Co Ltd
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Press Kogyo Co Ltd
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【０００１】
【発明の属する技術分野】
本発明は、車両のアンチロックブレーキシステム（ＡＢＳ）のセンサリング等に好適な歯付リング及びその凸歯成形方法に関する。
【０００２】
【従来の技術】
トラックや乗用車等の車両においてはアンチロックブレーキシステム（ＡＢＳ）が搭載されている。これにおいては、車軸の回転速度を検出してブレーキ制御を行うため、車軸にセンサリングが取り付けられている。
【０００３】
本出願人は以前、この種のセンサリングに好適な歯付リングの提案を特願平7-332495号（特開平9-150234号公報）において行った。図６に示すようにこの歯付リング１は、全体が鋼板等磁性を持つ板材２で一体に形成され、車軸等への圧入部分である円筒部３と、その上端位置から径方向外方に広がるフランジ部４とを有する。フランジ部４がせん断加工されて凹凸状に成形され、その凹部表面から複数の凸歯６が所定高さ突出される。凸歯６は周方向等間隔で複数設けられる。
【０００４】
車軸回転速度の検出に際しては、フランジ部４の表面部（上面部）に対向して磁気センサＭが設置され、磁気センサＭが凸歯６の通過毎にパルスを発生する。これにより図示しない制御装置で時間当たりのパルス数をカウントし、車軸回転速度を割り出すことができる。
【０００５】
この歯付リング１の製造方法としては、図４に示すようなリング状板材２１を素材として用い、これを図５に示す如くバーリング加工し、円筒部３とフランジ部４とを設ける。そして図７に示すように、フランジ部４を凹凸状の金型２２，２３で表裏側から挟み込んでせん断加工、特に半せん断加工する。こうするとフランジ部４には凸歯６と、凸歯６間の凹部７とが同時形成され、製品である歯付リング１が完成する。
【０００６】
【発明が解決しようとする課題】
ところで、歯付リング１では、凹部表面からの凸歯６の高さｈはできるだけ高い方が回転検出精度上望ましい。しかし、素材厚さｔの中間付近でせん断を止めてしまう半せん断による凸歯成形方法だと、凸歯６の高さｈは素材厚さｔより小さい範囲に制限されてしまい、それ程高くできない。特に軽量化のため素材厚さｔを薄くすることを考えた場合、凸歯６の高さｈが益々低くなり、回転検出に一層不利となる。
【０００７】
そこで、本発明の目的は、凸歯の高さを高くすることができ、回転検出、軽量化に有利な歯付リング及びその凸歯成形方法を提供することにある。
【０００８】
【課題を解決するための手段】
本発明は、凸部と凹部とが周方向に沿って交互に設けられた上型と下型により板材からなるフランジ部を表裏側から挟み込んでせん断加工して凹凸状に形成し、上記フランジ部の凹部表面から所定高さ突出する凸歯を一体に設けた歯付リングであって、上型の凹部よりも下型の凹部を材料を逃がすために高さ方向の深さを深く形成すると共に、上記せん断加工時に下型の凸部を上型の凹部内に且つ上型の凸部を下型の凹部内にそれぞれ一部を入り込ませることにより上記フランジ部の凸歯と凹部との間の材料を高さ方向に引き伸ばし、該材料で上記フランジ部の凸歯と凹部とを連結して上記凸歯の底面の高さ位置を上記凹部表面より高くしたことを特徴とする。
【００１０】
上記上型と下型の凸部先端の角部を断面アール状とすることにより上記フランジ部の凸歯と凹部とを滑らかに連結することが好ましい。
【００１１】
また本発明は、凸部と凹部とが周方向に沿って交互に設けられた上型と下型により板材からなるフランジ部を表裏側から挟み込んでせん断加工して凹凸状に形成し、上記フランジ部の凹部表面から所定高さ突出する凸歯を一体に設ける歯付リングの凸歯成形方法において、上型の凹部よりも下型の凹部を材料を逃がすために高さ方向の深さを深く形成すると共に、上記せん断加工時に下型の凸部を上型の凹部内に且つ上型の凸部を下型の凹部内にそれぞれ一部を入り込ませ、これにより上記フランジ部の凸歯と凹部との間の材料を高さ方向に引き伸ばし、該材料で上記フランジ部の凸歯と凹部とを連結して上記凸歯の底面の高さ位置を上記凹部表面より高くすることを特徴とする。
【００１２】
上記上型と下型の凸部先端の角部を断面アール状とすることにより上記フランジ部の凸歯と凹部とを滑らかに連結することが好ましい。
【００１３】
【発明の実施の形態】
以下、本発明の好適な実施の形態を添付図面に基づいて詳述する。
【００１４】
実施形態にかかる歯付リングの全体構成は図６に示す通り従来同様である。即ち、歯付リング１は板材２を用いて一体に形成される。板材２は磁性材料からなり、ここでは鋼板とされる。なおステンレス板等、他の金属板等も可能である。板材２の素材厚さは 2.0〜4.0mm 程度である。それ故汎用プレス機のみで容易且つ安価に製造できる。
【００１５】
歯付リング１は、車軸等への圧入部分である円筒部３と、その上端位置から径方向外方に広がるフランジ部４とを一体に有する。これら円筒部３とフランジ部４との成形は前述のバーリング加工による。フランジ部４は後述するせん断加工により全周凹凸状に成形される。特にフランジ部４の表面側（上側）に複数の凸歯６が周方向等間隔で設けられる。図２に示すように、各凸歯６の間に凹部７が設けられ、この凹部７表面から凸歯６が所定高さＨ突出されている。
【００１６】
凸歯６の成形方法について以下詳述する。これにおいては、図１に示すように、上下一対の凹凸状の金型を用いる。上型８は昇降型で、下型９は固定型である。各型８，９に凸部８ａ，９ａと凹部８ｂ，９ｂとが周方向に沿って交互に設けられ、一方の型８（９）の凸部８ａ（９ａ）が他方の型９（８）の凹部９ｂ（８ｂ）内に入り込めるようになっている。
【００１７】
両型８，９の凸部８ａ，９ａ先端の角部１０ａ，１０ｂは、所定のアール径Ｒａ，Ｒｂを有する断面アール状とされる。また上型８において、凹部８ｂ頂面と凸部８ａ側面とがなす角部１１ａは、その断面がほぼ角状となる微小なアール形状とされる。これは図２に示すように、凸歯６の角のエッジをシャープに仕上げるためである。一方、図２に示すように、下型９における凹部９ｂの底部付近は成形に関与しない。このため凹部９ｂの底部の角は削り出し及び研磨、又は放電加工及び研磨による自然なアール形状とされている。
【００１８】
両型８，９の凸部８ａ，９ａは若干の抜き勾配が付けられ、テーパ状とされている。これは成形時の静水圧付加や型抜きを容易にするためである。上型８の凹部８ｂより下型９の凹部９ｂの方が高さ方向の深さが深い。これは図２に示すように下型９の凹部９ｂ内で材料を逃がすためである。
【００１９】
図１に示すように、凸歯成形に際しては、上型８を上昇させておき、下型９の凸部９ａ上にフランジ部４を載せる。フランジ部４は凸歯加工側である表面側を上にしてセットする。次に、この状態で上型８を下降させ、上型８と下型９とでフランジ部４を表裏側から挟み込んでせん断加工後、押圧成形する。図２に示すように上型８の下降は、上型８の凸部８ａの先端が下型９の凹部９ｂ内に僅かに入り込むまで行う。こうすると自ずと、下型９の凸部９ａの先端が上型８の凹部８ｂ内に僅かに入り込むようになる。つまり両型８，９の凸部８ａ，９ａ同士が高さ方向に僅かにオーバーラップする。
【００２０】
下型９の凸部９ａがフランジ部４の材料を上型８の凹部８ｂ内に積極的に押し込む。これにより材料が凹部８ｂ内で押圧成形され、凹部８ｂの内面形状に沿った断面四角状の凸歯６が出来上がる。一方、上型８の凸部８ａが凸歯６間の材料を下型９の凹部９ｂ内に押し込む。これによりフランジ部４の凹部７が成形される。凹部７の表面１３と両側面１４とが上型凸部８ａ下面と下型凸部９ａ側面とでフラット面に成形される。一方、凹部７の成形時に材料が下方に逃がされるため、凹部７の下面は下にダレた形状となる。
【００２１】
両凸部８ａ，９ａの角部１０ａ，１０ｂの間に隙間があるため、凸歯６及び凹部７の成形時に凸歯６及び凹部７間の材料１２が隙間内を塑性流動し、高さ方向に引き伸ばされる。この引き伸ばされた材料１２により凸歯６と凹部７との連結状態が保たれ、かつ、凸歯６の全体が凹部表面１３より上方に位置される。凸歯６の底面１５の高さ位置は凹部表面１３より高くなる。
【００２２】
こうして凸歯６と凹部７の成形を終えれば製品としての歯付リング１が完成する。後は上型８を上昇させて製品を取り出せばよい。
【００２３】
この歯付リング１では、凹部表面１３からの凸歯６の高さＨが凸歯６の厚さＴより大きい。つまり材料１２を高さ方向に引き伸ばした分、凸歯６を高くできる。これにより従来の半せん断の場合に比べ、凸歯を高くすることができ、回転検出に有利となる。また凸歯６を高くできる分、素材厚さＴ0 （図１参照）を薄くすることができ、軽量化にも有利となる。凸歯６と凹部７とが材料１２によって連結されるため、リング全体の剛性が確保される。材料１２は、凸歯６の底部両側の角部と、凹部７の上端両側の角部とを連結している。材料１２を断面アール状の角部１０ａ，１０ｂでかたどるため、凸歯６と凹部７とが滑らかに連結され強度上有利となる。
【００２４】
このように、本発明ではせん断ストロークを従来より大きくとり、材料が切れる直前即ち完全せん断の直前でせん断を止めている。そしてこのときの材料の塑性伸びを利用して凸歯６と凹部７を連結し、且つ凸歯６を凹部７の上方に位置付けている。
【００２５】
なお、完成後の歯付リング１では、凸歯６が密閉鍛造されているためその厚さＴは素材厚さＴ0 より若干薄くなるのが普通である。またこの分の材料が凹部７に移動するので、凹部７の厚さＴ1 は素材厚さＴ0 より若干厚くなるのが普通である。
【００２６】
ところで、図３に示すように、下型９の凸部９ａの頂面１６を凹部８ｂ側に向かって膨出させ、材料をより積極的に凹部８ｂ内に押し込むようにしてもよい。ここでは凸部９ａの頂面１６が断面アール状に膨出される。こうすると、凸歯６の底面１５が断面アールの凹面に形成され、凸歯６の高さＨは、凸歯６の最小厚さＴmin との関係では益々高くなり、一層の素材薄肉化を期待できる。
【００２７】
本発明の実施形態は上述のものに限られない。例えば、本実施形態では円筒部に対しフランジ部を径方向外側に設けたが、径方向内側に設けてもよい。円筒部を段付き形状とすることもできる。本発明の歯付リングはＡＢＳ用センサリングに好適だが、他にも様々な適用例が考えられる。
【００２８】
【発明の効果】
本発明は次の如き優れた効果を発揮する。
【００２９】
（１） 凸歯の高さを高くすることができ、回転検出に有利となる。
【００３０】
（２） 素材を薄肉化でき、軽量化に有利となる。
【図面の簡単な説明】
【図１】本発明の実施形態を示す縦断面図で、凸歯成形前の様子を示す。
【図２】本発明の実施形態を示す縦断面図で、凸歯成形後の様子を示す。
【図３】本発明の別の実施形態を示す縦断面図で、凸歯成形後の様子を示す。
【図４】リング状板材を示す斜視図である。
【図５】円筒部及びフランジ部を形成した中間成形品を示す斜視図である。
【図６】歯付リングの全体斜視図である。
【図７】従来の凸歯成形方法を示す縦断面図である。
【符号の説明】
１ 歯付リング
２ 板材
４ フランジ部
７ 凹部
８ 上型
８ｂ 凹部
９ 下型
９ａ 凸部
１２ 材料
１３ 表面
１５ 底面
Ｈ 凸歯の高さ
Ｔ 凸歯の厚さ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a toothed ring suitable for a sensor ring or the like of an antilock brake system (ABS) for a vehicle and a method for forming a convex tooth thereof.
[0002]
[Prior art]
Vehicles such as trucks and passenger cars are equipped with an antilock brake system (ABS). In this case, in order to perform brake control by detecting the rotational speed of the axle, a sensor ring is attached to the axle.
[0003]
The present applicant has previously proposed a toothed ring suitable for this type of sensor ring in Japanese Patent Application No. 7-332495 (Japanese Patent Laid-Open No. 9-150234). As shown in FIG. 6, the toothed ring 1 is integrally formed of a plate member 2 having magnetism such as a steel plate, and a cylindrical portion 3 that is a press-fitted portion to an axle or the like, and radially outward from its upper end position. And a flange portion 4 that expands. The flange portion 4 is sheared and formed into a concavo-convex shape, and a plurality of convex teeth 6 project from the surface of the concave portion by a predetermined height. A plurality of convex teeth 6 are provided at equal intervals in the circumferential direction.
[0004]
When detecting the axle rotation speed, the magnetic sensor M is installed facing the surface portion (upper surface portion) of the flange portion 4, and the magnetic sensor M generates a pulse every time the convex teeth 6 pass. As a result, the number of pulses per hour can be counted by a control device (not shown) to determine the axle rotation speed.
[0005]
As a manufacturing method of the toothed ring 1, a ring-shaped plate material 21 as shown in FIG. 4 is used as a material, and this is subjected to burring as shown in FIG. 5 to provide the cylindrical portion 3 and the flange portion 4. Then, as shown in FIG. 7, the flange portion 4 is sandwiched from the front and back sides by the concave and convex molds 22 and 23 and subjected to shearing processing, particularly semi-shear processing. In this way, the convex teeth 6 and the concave portions 7 between the convex teeth 6 are simultaneously formed on the flange portion 4, and the toothed ring 1 as a product is completed.
[0006]
[Problems to be solved by the invention]
By the way, in the toothed ring 1, it is desirable in terms of rotation detection accuracy that the height h of the convex teeth 6 from the concave surface is as high as possible. However, in the convex tooth forming method by semi-shear that stops the shear in the middle of the material thickness t, the height h of the convex teeth 6 is limited to a range smaller than the material thickness t and cannot be so high. In particular, when considering reducing the material thickness t for weight reduction, the height h of the convex teeth 6 becomes lower and more disadvantageous for rotation detection.
[0007]
Accordingly, an object of the present invention is to provide a toothed ring that can increase the height of convex teeth and is advantageous for rotation detection and weight reduction, and a method for forming the convex teeth.
[0008]
[Means for Solving the Problems]
According to the present invention, a flange portion made of a plate material is sandwiched from the front and back sides by an upper mold and a lower mold in which convex portions and concave portions are alternately provided along the circumferential direction, and is formed into an uneven shape by shearing. the met toothed ring provided from the recess surface integrally predetermined height protruding convex tooth, as well as deeper in the height direction of the depth to the escape of material to the lower die recess than the recess of the upper die , between the protruding teeth and the concave portion of the flange portion by causing enter each part in the recess of the lower mold projections of and upper die in a recess of the upper die and the convex portion of the lower mold during the shearing stretching the material in the height direction, with material and connects the protruding teeth and a concave portion of the flange portion, characterized in that the height position of the bottom surface of the protruding teeth were higher than the recess surface.
[0010]
It is preferable to smoothly connect the convex teeth of the flange portion and the concave portion by making the corners of the convex ends of the upper die and the lower die round .
[0011]
The present invention, the flange portion and the convex portion and the concave portion is made of a plate material by the upper and lower molds provided alternately along the circumferential direction is formed in an uneven shape by shearing sandwich from the table back, the flange In a convex tooth molding method for a toothed ring in which convex teeth projecting a predetermined height from the concave surface of the part are integrally formed, the depth in the height direction is made deeper in order to allow the material in the concave part of the lower mold to escape from the concave part of the upper mold. and forming, respectively allowed to enter a part in the lower mold recess projections of and upper die in a recess of the upper die and the convex portion of the lower mold during the shearing, thereby protruding teeth and a concave of the flange portion stretching the material between the parts in the height direction, and characterized in that in the material by connecting the protruding teeth and a concave portion of the flange portion of the height position of the bottom surface of the protruding teeth higher than the recess surface To do.
[0012]
It is preferable to smoothly connect the convex teeth of the flange portion and the concave portion by making the corners of the convex ends of the upper die and the lower die round .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
[0014]
The overall configuration of the toothed ring according to the embodiment is the same as that of the prior art as shown in FIG. That is, the toothed ring 1 is integrally formed using the plate material 2. The plate material 2 is made of a magnetic material, and here is a steel plate. Other metal plates such as a stainless steel plate are also possible. The material thickness of the plate 2 is about 2.0 to 4.0 mm. Therefore, it can be manufactured easily and inexpensively with only a general-purpose press.
[0015]
The toothed ring 1 integrally includes a cylindrical portion 3 that is a press-fit portion to an axle or the like, and a flange portion 4 that spreads radially outward from the upper end position thereof. The cylindrical portion 3 and the flange portion 4 are formed by the burring process described above. The flange portion 4 is formed into a concavo-convex shape on the entire circumference by a shearing process to be described later. In particular, a plurality of convex teeth 6 are provided at equal intervals in the circumferential direction on the surface side (upper side) of the flange portion 4. As shown in FIG. 2, a concave portion 7 is provided between the convex teeth 6, and the convex teeth 6 protrude from the surface of the concave portion 7 by a predetermined height H.
[0016]
The method for forming the convex teeth 6 will be described in detail below. In this case, as shown in FIG. 1, a pair of upper and lower concave and convex molds is used. The upper mold 8 is a lifting mold, and the lower mold 9 is a fixed mold. Convex portions 8a and 9a and concave portions 8b and 9b are alternately provided in the respective molds 8 and 9 along the circumferential direction, and the convex portion 8a (9a) of one mold 8 (9) is the other mold 9 (8). It is possible to enter the recess 9b (8b).
[0017]
The corners 10a and 10b at the tips of the convex portions 8a and 9a of both molds 8 and 9 have a rounded cross-sectional shape having predetermined radiuses Ra and Rb. Further, in the upper mold 8, the corner portion 11a formed by the top surface of the concave portion 8b and the side surface of the convex portion 8a is formed into a minute round shape having a substantially square cross section. This is to sharpen the corner edges of the convex teeth 6 as shown in FIG. On the other hand, as shown in FIG. 2, the vicinity of the bottom of the recess 9 b in the lower mold 9 is not involved in the molding. For this reason, the corner | angular part of the bottom part of the recessed part 9b is made into the natural round shape by cutting out and grinding | polishing or electrical discharge machining and grinding | polishing.
[0018]
The convex portions 8a and 9a of both molds 8 and 9 have a slight draft and are tapered. This is for facilitating the application of hydrostatic pressure and mold release during molding. The recess 9b of the lower mold 9 is deeper in the height direction than the recess 8b of the upper mold 8. This is because the material escapes in the recess 9b of the lower mold 9 as shown in FIG.
[0019]
As shown in FIG. 1, when forming convex teeth, the upper die 8 is raised and the flange portion 4 is placed on the convex portion 9 a of the lower die 9. The flange portion 4 is set with the surface side that is the convex tooth processing side facing up. Next, the upper die 8 is lowered in this state, the flange portion 4 is sandwiched between the upper die 8 and the lower die 9 from the front and back sides, and after shearing, press molding is performed. As shown in FIG. 2, the upper die 8 is lowered until the tip of the convex portion 8 a of the upper die 8 slightly enters the concave portion 9 b of the lower die 9. In this way, the tip of the convex portion 9a of the lower mold 9 naturally enters the concave portion 8b of the upper mold 8 slightly. That is, the convex portions 8a and 9a of both molds 8 and 9 slightly overlap in the height direction.
[0020]
The convex part 9 a of the lower mold 9 positively pushes the material of the flange part 4 into the concave part 8 b of the upper mold 8. Thereby, the material is press-molded in the recess 8b, and the convex tooth 6 having a square cross section along the inner surface shape of the recess 8b is completed. On the other hand, the convex portion 8 a of the upper mold 8 pushes the material between the convex teeth 6 into the concave portion 9 b of the lower mold 9. Thereby, the recessed part 7 of the flange part 4 is shape | molded. The surface 13 and both side surfaces 14 of the recess 7 are formed into a flat surface by the lower surface of the upper mold convex portion 8a and the side surface of the lower mold convex portion 9a. On the other hand, since the material is released downward when the concave portion 7 is formed, the lower surface of the concave portion 7 has a shape that sags downward.
[0021]
Since there is a gap between the corners 10a, 10b of both the convex portions 8a, 9a, the material 12 between the convex teeth 6 and the concave portions 7 plastically flows in the gaps during molding of the convex teeth 6 and the concave portions 7, and the height direction To be stretched. The stretched material 12 maintains the connection between the convex teeth 6 and the concave portions 7, and the entire convex teeth 6 are positioned above the concave surface 13. The height position of the bottom surface 15 of the convex tooth 6 is higher than the concave surface 13.
[0022]
When the formation of the convex teeth 6 and the concave portions 7 is thus completed, the toothed ring 1 as a product is completed. Thereafter, the upper die 8 is raised and the product is taken out.
[0023]
In the toothed ring 1, the height H of the convex teeth 6 from the concave surface 13 is larger than the thickness T of the convex teeth 6. That is, the convex teeth 6 can be raised by the amount of the material 12 stretched in the height direction. As a result, the convex teeth can be made higher than in the case of conventional half-shear, which is advantageous for rotation detection. Further, the material thickness T 0 (see FIG. 1) can be reduced by the amount that the convex teeth 6 can be raised, which is advantageous for weight reduction. Since the convex teeth 6 and the concave portions 7 are connected by the material 12, the rigidity of the entire ring is ensured. The material 12 connects the corners on both sides of the bottom of the convex tooth 6 and the corners on both sides of the upper end of the recess 7. Since the material 12 is formed by the corner portions 10a and 10b having a rounded cross section, the convex teeth 6 and the concave portions 7 are smoothly connected, which is advantageous in terms of strength.
[0024]
Thus, in the present invention, the shear stroke is made larger than before, and the shear is stopped immediately before the material is cut, that is, immediately before the complete shear. And the convex tooth 6 and the recessed part 7 are connected using the plastic elongation of the material at this time, and the convex tooth 6 is positioned above the recessed part 7.
[0025]
In the toothed ring 1 after completion, since the convex teeth 6 are hermetically forged, the thickness T is usually slightly smaller than the material thickness T 0 . Further, since this amount of material moves to the concave portion 7, the thickness T 1 of the concave portion 7 is usually slightly larger than the raw material thickness T 0 .
[0026]
By the way, as shown in FIG. 3, the top surface 16 of the convex portion 9a of the lower mold 9 may be bulged toward the concave portion 8b, and the material may be pushed more positively into the concave portion 8b. Here, the top surface 16 of the convex portion 9a bulges in a rounded cross section. In this way , the bottom surface 15 of the convex tooth 6 is formed in a concave surface with a rounded cross section, and the height H of the convex tooth 6 becomes higher in relation to the minimum thickness Tmin of the convex tooth 6, and further material thinning is expected. it can.
[0027]
Embodiments of the present invention are not limited to those described above. For example, in the present embodiment, the flange portion is provided on the radially outer side with respect to the cylindrical portion, but may be provided on the radially inner side. A cylindrical part can also be made into a stepped shape. Although the toothed ring of the present invention is suitable for an ABS sensor ring, various other application examples are conceivable.
[0028]
【The invention's effect】
The present invention exhibits the following excellent effects.
[0029]
(1) The height of the convex teeth can be increased, which is advantageous for rotation detection.
[0030]
(2) The material can be thinned, which is advantageous for weight reduction.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, showing a state before convex tooth molding.
FIG. 2 is a longitudinal sectional view showing an embodiment of the present invention, showing a state after convex tooth molding.
FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention, showing a state after convex tooth molding.
FIG. 4 is a perspective view showing a ring-shaped plate member.
FIG. 5 is a perspective view showing an intermediate molded product in which a cylindrical portion and a flange portion are formed.
FIG. 6 is an overall perspective view of a toothed ring.
FIG. 7 is a longitudinal sectional view showing a conventional convex tooth forming method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Toothed ring 2 Plate | plate material 4 Flange part 7 Recessed part 8 Upper mold 8b Recessed part 9 Lower mold 9a Convex part 12 Material 13 Surface 15 Bottom face H Height of convex tooth T Thickness of convex tooth

Claims (4)

凸部と凹部とが周方向に沿って交互に設けられた上型と下型により板材からなるフランジ部を表裏側から挟み込んでせん断加工して凹凸状に形成し、上記フランジ部の凹部表面から所定高さ突出する凸歯を一体に設けた歯付リングであって、上型の凹部よりも下型の凹部を材料を逃がすために高さ方向の深さを深く形成すると共に、上記せん断加工時に下型の凸部を上型の凹部内に且つ上型の凸部を下型の凹部内にそれぞれ一部を入り込ませることにより上記フランジ部の凸歯と凹部との間の材料を高さ方向に引き伸ばし、該材料で上記フランジ部の凸歯と凹部とを連結して上記凸歯の底面の高さ位置を上記凹部表面より高くしたことを特徴とする歯付リング。 A flange portion made of a plate material is sandwiched from the front and back sides by an upper mold and a lower mold in which convex portions and concave portions are alternately provided along the circumferential direction, and is formed into a concave and convex shape from the surface of the concave portion of the flange portion. predetermined height met the toothed ring provided integrally protruding teeth protruding, with deep formed in the height direction of the depth to the escape of material to the lower die recess than the recess of the upper die, the shearing high material between the protruding teeth and the concave portion of the flange portion by causing enter a part each projecting portion of and the upper mold into the recess of the upper die to the lower die in the recess protrusion of the lower mold to sometimes is stretched in the direction, the toothed ring, characterized in that in the material by connecting the protruding teeth and a concave portion of the flange portion of the height position of the bottom surface of the protruding teeth were higher than the recess surface. 上記上型と下型の凸部先端の角部を断面アール状とすることにより上記フランジ部の凸歯と凹部とを滑らかに連結したことを特徴とする請求項１記載の歯付リング。The toothed ring according to claim 1, characterized in that smoothly connects the convex teeth and concave of the flange portion by the corners of the projection end of the upper and lower molds and a cross-sectional round shape. 凸部と凹部とが周方向に沿って交互に設けられた上型と下型により板材からなるフランジ部を表裏側から挟み込んでせん断加工して凹凸状に形成し、上記フランジ部の凹部表面から所定高さ突出する凸歯を一体に設ける歯付リングの凸歯成形方法であって、上型の凹部よりも下型の凹部を材料を逃がすために高さ方向の深さを深く形成すると共に、上記せん断加工時に下型の凸部を上型の凹部内に且つ上型の凸部を下型の凹部内にそれぞれ一部を入り込ませ、これにより上記フランジ部の凸歯と凹部との間の材料を高さ方向に引き伸ばし、該材料で上記フランジ部の凸歯と凹部とを連結して上記凸歯の底面の高さ位置を上記凹部表面より高くすることを特徴とする歯付リングの凸歯成形方法。 A flange portion and the convex portion and the concave portion is made of a plate material by the upper and lower molds provided alternately along the circumferential direction is formed in an uneven shape by shearing sandwich from the table back from the recessed surface of the flange A convex tooth molding method for a toothed ring in which convex teeth protruding at a predetermined height are integrally formed, and the depth in the height direction is formed deeper than the concave portion of the upper mold so as to release the material from the concave portion of the lower mold. each allowed to enter a part in the lower mold recess projections of and upper die in a recess of the upper die and the convex portion of the lower mold during the shearing, thereby the protruding teeth and the concave portion of the flange stretching the material between the height direction, toothed, characterized in that to increase the height position of the bottom surface of the protruding teeth than the recess surface and connects the protruding teeth and a concave portion of the flange portion with the material A method for forming convex teeth on a ring. 上記上型と下型の凸部先端の角部を断面アール状とすることにより上記フランジ部の凸歯と凹部とを滑らかに連結したことを特徴とする請求項３記載の凸歯成形方法。Convex teeth forming method according to claim 3, characterized in that smoothly connects the convex teeth and concave of the flange portion by the corners of the projection end of the upper and lower molds and a cross-sectional round shape.
JP14363299A 1999-05-24 1999-05-24 Toothed ring and method for forming convex teeth thereof Expired - Fee Related JP4291916B2 (en)

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