JPH06104262B2 - Spiral bevel gear by rotary forging method-Manufacturing method - Google Patents
Spiral bevel gear by rotary forging method-Manufacturing methodInfo
- Publication number
- JPH06104262B2 JPH06104262B2 JP10074684A JP10074684A JPH06104262B2 JP H06104262 B2 JPH06104262 B2 JP H06104262B2 JP 10074684 A JP10074684 A JP 10074684A JP 10074684 A JP10074684 A JP 10074684A JP H06104262 B2 JPH06104262 B2 JP H06104262B2
- Authority
- JP
- Japan
- Prior art keywords
- indenter
- upper die
- tooth
- die
- main shaft
- 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
- 238000005242 forging Methods 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000000463 material Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/04—Making gear wheels, racks, spline shafts or worms bevel gears
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
- B21J9/025—Special design or construction with rolling or wobbling dies
-
- 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
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- 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
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
- B21K1/305—Making machine elements wheels; discs with gear-teeth helical
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 本発明はスパイラルベベルギヤーの製造方法に係り、特
に回転鍛造法によりスパイラルベベルギヤーを鍛造成形
することに関する。TECHNICAL FIELD The present invention relates to a method for manufacturing a spiral bevel gear, and more particularly to forging a spiral bevel gear by a rotary forging method.
従来の技術 スパイラルベベルギヤーの鍛造成形法は種々試みられて
いるが、プレス成形機による場合は大容量のプレス機が
必要となり、しかも歯筋方向にネジレを有するため、金
型への負荷が大きい欠点があり、また粉末鍛造では歯型
断面の粉末密度のバラツキによる強度不足の不安があ
る。Conventional technology Various forging methods for spiral bevel gears have been tried, but when using a press molding machine, a large-capacity pressing machine is required, and since there is a twist in the tooth trace direction, the load on the mold is large. There is a drawback, and in powder forging, there is a concern that the strength will be insufficient due to variations in the powder density of the tooth profile.
さらにまた、特公昭49−47621号の如く回転鍛造機によ
る転造法によって製造することも知られているが、この
転造法による欠点は、歯車の仕様毎に、プランジャの進
退に伴いプランジャを該軸まわりに強制的に回転させる
手段（ヘリカルスプライン）の仕様も変更する必要があ
ることである。Further, it is also known to manufacture by a rolling method using a rotary forging machine as in Japanese Patent Publication No. Sho 49-47621, but the drawback of this rolling method is that the plunger is moved according to the specification of the gear as the plunger moves back and forth. It is also necessary to change the specification of the means (helical spline) forcibly rotating around the axis.
発明が解決しようとする問題点 そこで発明者は、上記欠点を解決するために、第１図に
示すように回転鍛造機の主軸１に連結された上型圧子２
と、その上型圧子に対向する型彫空間５の底部に歯型部
６が形成された下型４との間に被成形素材８を挿入し、
上型圧子２の加圧により、下型の歯形部６に素材を充満
させる如く鍛造する着想を得た。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In order to solve the above-mentioned drawbacks, the inventor has, as shown in FIG. 1, an upper die indenter 2 connected to a main shaft 1 of a rotary forging machine.
And the material to be molded 8 is inserted between the upper die indenter and the lower die 4 having the tooth die portion 6 formed at the bottom of the die engraving space 5 facing the indenter,
The idea of forging so that the tooth profile 6 of the lower die is filled with the material by the pressurization of the upper die indenter 2 was obtained.
しかし、第２図に示す如く、下型の歯型部６の歯筋の半
径方向外側に向かうネジレ方向とは逆の矢印Ａ方向に主
軸１を回転させて鍛造すると、その成形品8aの成形歯部
9aは第３図のIV−IV断面を表わす第４図に見られる如
く、主軸１回転方向とは反対側の側面部に多大な欠肉部
10,11が発生し、満足な製品を得ることができない。However, as shown in FIG. 2, when the main shaft 1 is forged by rotating the main shaft 1 in the direction of arrow A opposite to the spiral direction toward the radial outside of the tooth trace of the lower tooth profile portion 6, the molded product 8a is formed. Tooth
As shown in FIG. 4 which shows the IV-IV cross section of FIG. 3, 9a has a large amount of cutout on the side surface opposite to the direction of rotation of the main shaft 1.
10 and 11 occur, and it is not possible to obtain a satisfactory product.
問題点を解決するための手段 ところが、第２図の矢印Ｂで示す如く、下型４の歯型部
６の歯筋の半径方向外側に向かうネジレ方向に一致させ
て主軸１を回転させ、被成形素材８を回転鍛造すると、
その成形品8bの成形歯部9bは第５図のVII−VII断面を表
わす第６図に見られる如く、欠肉及びかぶり等の欠陥な
く十分に満足できるスパイラルベベルギヤーの成形品8b
を得ることができる。このことは原出願にも記されてい
るが、この製造に際し、下型４の歯型部６の歯筋の半径
方向外側に向かうネジレ方向に主軸回転方向を一致さ
せ、かつ第８図乃至第９図に示すように上型圧子の間欠
加圧運動軌跡を該回転方向に順次移動させて回転鍛造し
ても良好な成形品を得ることができる。Means for Solving the Problems However, as shown by the arrow B in FIG. 2, the main shaft 1 is rotated in conformity with the spiral direction of the tooth trace of the lower die 4 toward the radially outer side of the tooth trace, and the main shaft 1 is rotated. When the molding material 8 is rotary forged,
The molded tooth portion 9b of the molded product 8b is, as shown in FIG. 6 showing the VII-VII cross section of FIG. 5, a spiral bevel gear molded product 8b which can be sufficiently satisfied without defects such as wall thickness and fog.
Can be obtained. This is also described in the original application, but at the time of this manufacturing, the main shaft rotation direction is made to coincide with the spiral direction of the tooth trace of the tooth mold portion 6 of the lower mold 4 toward the outer side in the radial direction, and FIGS. As shown in FIG. 9, a good molded product can be obtained even if the intermittent pressurizing motion locus of the upper die indenter is sequentially moved in the rotation direction and rotary forging is performed.
作用 上型圧子の間欠加圧運動軌跡を特定回転方向に順次移動
させる。Action The intermittent pressurization motion locus of the upper die indenter is sequentially moved in the specific rotation direction.
実 施 例 以下本発明の実施例について、より詳細に説明する。ま
ず回転鍛造機について説明すると、上型のみそすり運動
により成形を行う回転鍛造機は、既に古くから知られて
おり、その要部のみが第１図に示されている。この第１
図に示された主軸１及び主軸に連結された上型圧子２
は、図示されてない駆動機構により角度θの傾きをもっ
てみそすり運動をするように装着されている。そのみそ
すり運動型式には、上型圧子２に単純な回転みそすり運
動である連続加圧運動軌跡を描かすものと、例えば第８
図及び第10図に示されるような上型圧子２に間欠加圧運
動軌跡を描かすものがあることも古くから知られてい
る。本発明は後者の間欠加圧運動軌跡を活用するもので
ある。EXAMPLES Examples of the present invention will be described in more detail below. First, a rotary forging machine will be described. A rotary forging machine that performs molding by rubbing motion of an upper die has been known for a long time, and only a main part thereof is shown in FIG. This first
Main shaft 1 and upper die indenter 2 connected to the main shaft shown in the figure
Are mounted so as to perform a rasping motion with an inclination of an angle θ by a drive mechanism (not shown). The shaving motion type is, for example, one in which a continuous pressurizing motion locus, which is a simple rotating shaving motion, is drawn on the upper die indenter 2,
It has been known for a long time that the upper die indenter 2 as shown in the drawings and FIG. The present invention utilizes the latter intermittent pressurizing motion locus.
なお、第８図及び第10図に示す矢印Ｃは、第２図の矢印
Ｂと同一の下型４の歯型部６の歯筋の半径方向外側に向
かうネジレ方向に一致させた回転方向を示す。The arrow C shown in FIG. 8 and FIG. 10 indicates the rotation direction that is the same as the arrow B in FIG. 2 and is aligned with the spiral direction toward the radially outer side of the tooth trace of the tooth mold portion 6 of the lower mold 4. Show.
第８図に実線で示される圧子間欠加圧運動軌跡は、上型
圧子２が被成形素材８との相対回転の無い状態で、第９
図に示す如く角度θ1,θ２の傾きを与えられ矢印Ｅのよ
うに揺動されることによって描かれる。従って実線で示
される１サイクルの揺動後も、同様の圧子の間欠加圧運
動軌跡が斯様な１サイクル揺動により、破線で示す如く
矢印Ｃ回転方向に適当なピッチで間欠的に順次移動して
繰り返される。The indenter intermittent pressurizing motion locus shown by the solid line in FIG. 8 is the 9th indenter when the upper die indenter 2 does not rotate relative to the material 8 to be molded.
As shown in the figure, it is drawn by giving inclinations of angles θ 1 and θ 2 and swinging as indicated by arrow E. Therefore, even after one cycle of rocking indicated by the solid line, a similar intermittent pressurizing motion locus of the indenter moves intermittently sequentially at an appropriate pitch in the direction of arrow C as shown by the broken line due to such one cycle of rocking. And then repeated.
また第10図に示される圧子間欠加圧運動軌跡は、圧子揺
動中に所定の相対回転を上型圧子２と被成形素材８に与
えることによって描かれるものであり、第８図の場合同
様に矢印Ｃ回転方向に適当なピッチで間欠的に、順次移
動して繰り返される。The locus of intermittent pressurization motion shown in FIG. 10 is drawn by giving a predetermined relative rotation to the upper die indenter 2 and the material to be molded 8 while the indenter is rocking. The arrow C is intermittently moved in the direction of rotation at an appropriate pitch, and sequentially repeated.
下型４は図示されてない昇降機構により上型圧子２に対
して進退自在となっている。The lower die 4 can be moved back and forth with respect to the upper die indenter 2 by an elevator mechanism (not shown).
下型４において、７はノックアウトで上端面は型彫空間
５の底面の一部を構成している。そしてこのノックアウ
ト７は成形完了後に上昇され、成形品を押し出すように
設けられている。In the lower die 4, 7 is a knockout, and the upper end surface thereof constitutes a part of the bottom surface of the die engraving space 5. The knockout 7 is provided so as to be lifted after the completion of molding and to push out the molded product.
下型４の型彫空間５は、上型圧子２の先端の加圧面３に
対向して彫られており、その底部の外周側には第２図に
示す如く、所望のスパイラル歯型の歯型部６が環状に形
成されている。The die engraving space 5 of the lower die 4 is engraved so as to face the pressure surface 3 at the tip of the upper die indenter 2. The outer peripheral side of the bottom of the die is a desired spiral tooth type tooth as shown in FIG. The mold part 6 is formed in an annular shape.
つぎにスパイラルベベルギヤーの成形工程について説明
する。Next, the forming process of the spiral bevel gear will be described.
予め所定の体積に切断され或は切断後予備成形された被
成形素材８を、第１図左側に示すように型彫空間５内に
挿入し、その後、下型４を上昇させると上型圧子２の加
圧面３と被成形素材８が接触を開始する。A material to be molded 8 which has been cut into a predetermined volume or which has been preformed after cutting is inserted into the mold engraving space 5 as shown on the left side of FIG. 1, and thereafter, when the lower mold 4 is raised, the upper mold indenter is pressed. The pressing surface 3 of 2 and the material 8 to be molded start contact.
そのため被成形素材８は、歯型部６の歯筋の半径方向外
側に向かうネジレ方向に主軸回転方向Ｂが一致され、か
つ第８図または第10図に示すように上型圧子２の間欠加
圧運動軌跡が該回転方向Ｂに順次移動される上型圧子２
の運動により回転鍛造される。その結果素材８は型彫空
間を充満するよう、第７図に示す如く成形される。Therefore, in the material to be molded 8, the main shaft rotation direction B is aligned with the spiral direction of the tooth trace of the tooth mold portion 6 toward the outside in the radial direction, and the upper die indenter 2 is intermittently applied as shown in FIG. 8 or 10. Upper die indenter 2 whose pressure locus is sequentially moved in the rotation direction B
Is rotary forged by the movement of. As a result, the material 8 is formed as shown in FIG. 7 so as to fill the die-cutting space.
なお、第７図に12で印された面は上型圧子２の加圧面３
と接触した圧子接触面である。The surface marked with 12 in FIG. 7 is the pressing surface 3 of the upper die indenter 2.
It is the contact surface of the indenter that contacts
発明の効果 以上のように本発明によれば、主軸に連結された上型圧
子とその上型圧子に対向する型彫空間の底部に歯型部が
形成された下型との間に被成形素材を挿入し、続いて前
記歯型部の歯筋の半径方向外側に向かうネジレ方向に前
記主軸回転方向を一致させ、かつ上型圧子の間欠加圧運
動軌跡を該回転方向に順次移動させて回転鍛造するよう
にしたので、成形歯部に欠肉やカブリ等の欠陥なくスパ
イラルベベルギヤーを成形することができる。さらにま
た、本発明によれば金型の円周方向応力が少ないため、
型寿命が長くなる。EFFECTS OF THE INVENTION As described above, according to the present invention, molding is performed between the upper die indenter connected to the main shaft and the lower die having the toothed portion formed at the bottom of the die engraving space facing the upper die indenter. After inserting the material, the main shaft rotation direction is aligned with the spiral direction of the tooth trace of the tooth profile portion toward the outside in the radial direction, and the intermittent pressing motion locus of the upper die indenter is sequentially moved in the rotation direction. Since the rotary forging is employed, the spiral bevel gear can be molded without defects such as lack of wall and fog on the molding teeth. Furthermore, according to the present invention, since the circumferential stress of the mold is small,
Mold life is extended.
追加の関係 本件発明は、歯型部の歯筋の半径方向外側に向かうネジ
レ方向に主軸回転方向を一致させて回転鍛造することに
おいて、原特願の特願昭59−19243号の発明を利用する
ものである。（特許法第31条第１項の規定による。）ADDITIONAL RELATIONS The present invention uses the invention of Japanese Patent Application No. 59-19243 of the original Japanese Patent Application in rotary forging in which the main shaft rotation direction is aligned with the spiral direction toward the radial outside of the tooth trace of the tooth profile. To do. (According to Article 31, Paragraph 1 of the Patent Act.)
第１図は回転鍛造機の要部の断面図。第２図は型彫空間
の平面説明図。第３図は主軸を歯筋のネジレ方向と逆回
転させて成形した成形品の説明図。第４図は第３図のIV
V−IV断面を表わす拡大断面図。第５図は主軸を歯筋の
ネジレ方向と一致させて成形した成形品の説明図。第６
図は第５図VII−VII断面を表わす拡大断面図。第７図は
回転鍛造成形を完了したスパイラルベベルギヤーの断面
図。第８図、第10図は上型圧子の間欠回転運動軌跡の説
明図。第９図は圧子揺動の説明図である。 （記号の説明） １……主軸。２……上型圧子。 ３……加圧面。４……下型。 ５……型彫空間。６……歯型部。 ８（8a,8b）……成形品。９（9a,9b）……成形歯部。FIG. 1 is a sectional view of a main part of a rotary forging machine. FIG. 2 is an explanatory plan view of the mold engraving space. FIG. 3 is an explanatory diagram of a molded product formed by rotating the main shaft in the direction opposite to the twist direction of the tooth trace. Figure 4 shows IV in Figure 3
An enlarged sectional view showing a V-IV section. FIG. 5 is an explanatory view of a molded product formed by aligning the main shaft with the twist direction of the tooth trace. Sixth
The figure is an enlarged sectional view showing a section taken along line VII-VII in FIG. FIG. 7 is a sectional view of the spiral bevel gear that has been subjected to rotary forging. 8 and 10 are explanatory views of the loci of intermittent rotary motion of the upper die indenter. FIG. 9 is an explanatory view of rocking of the indenter. (Explanation of symbols) 1 ... Spindle. 2 ... Upper die indenter. 3 ... Pressure surface. 4 ... Lower mold. 5: Mold carving space. 6 ... Tooth model. 8 (8a, 8b) …… Molded product. 9 (9a, 9b) …… Molding teeth.
Claims (1)
圧子２に対向する型彫空間５の底部に歯型部６が形成さ
れた下型４との間に被成形素材８を挿入し、続いて前記
歯型部６の歯筋の半径方向外側に向かうネジレ方向に前
記主軸１回転方向を一致させ、かつ上型圧子２の間欠加
圧運動軌跡を該回転方向に順次移動させて回転鍛造する
ことを特徴とする回転鍛造法によるスパイラルベベルギ
ヤー製造方法。1. A material to be molded 8 between an upper die indenter 2 connected to a main shaft 1 and a lower die 4 having a tooth die 6 formed at the bottom of a die engraving space 5 facing the upper die indenter 2. Is inserted, and subsequently, the rotation direction of the main shaft 1 is aligned with the spiral direction of the tooth trace of the tooth profile portion 6 toward the outside in the radial direction, and the locus of intermittent pressurizing movement of the upper die indenter 2 is sequentially moved in the rotation direction. A method for producing a spiral bevel gear by the rotary forging method, which comprises performing the rotary forging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10074684A JPH06104262B2 (en) | 1984-05-19 | 1984-05-19 | Spiral bevel gear by rotary forging method-Manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10074684A JPH06104262B2 (en) | 1984-05-19 | 1984-05-19 | Spiral bevel gear by rotary forging method-Manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60244440A JPS60244440A (en) | 1985-12-04 |
| JPH06104262B2 true JPH06104262B2 (en) | 1994-12-21 |
Family
ID=14282105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10074684A Expired - Lifetime JPH06104262B2 (en) | 1984-05-19 | 1984-05-19 | Spiral bevel gear by rotary forging method-Manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06104262B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117161299B (en) * | 2023-06-25 | 2026-01-02 | 武汉理工大学 | A method for forming a multi-degree-of-freedom spiral bevel gear with inverted conical teeth. |
| CN117340185B (en) * | 2023-09-18 | 2026-01-02 | 武汉理工大学 | Envelope Forming Method for Arc-tooth Bevel Gears Based on Local Forming-Overall Shaping |
-
1984
- 1984-05-19 JP JP10074684A patent/JPH06104262B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60244440A (en) | 1985-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6151778A (en) | Apparatus and method for roll forming gears | |
| JPS61502736A (en) | Forging method | |
| JP4350300B2 (en) | Shift gear wheel manufacturing method, apparatus for performing the method, and shift gear wheel manufactured by the method | |
| JPH06104262B2 (en) | Spiral bevel gear by rotary forging method-Manufacturing method | |
| JP2879187B2 (en) | Multistage gear forging method and apparatus | |
| JPH0261864B2 (en) | ||
| JPS60184444A (en) | Cold forming method of spline shaft or spline shaft provided with conduction parts | |
| JPH1171604A (en) | Molding method and powder molding apparatus for spiral bevel gear | |
| JPH09176701A (en) | Mold for forming helical gear with deformed section | |
| JP3503076B2 (en) | Gear shaft manufacturing method | |
| JP3542717B2 (en) | Rolled gear manufacturing method | |
| JPS5923894B2 (en) | How to manufacture gears from flat plate materials | |
| JP2927426B2 (en) | Tooth wheel | |
| JPS597455A (en) | Manufacture of rack of variable gear ratio steering device | |
| JPH0231262B2 (en) | ||
| JP3044884B2 (en) | Manufacturing method of helical toothed flange and manufacturing apparatus used therefor | |
| JP2870373B2 (en) | Manufacturing method of bevel gear | |
| JP2717397B2 (en) | External gear forming method | |
| JP2985271B2 (en) | Electric discharge machining method for helical gear forging die | |
| CN218761233U (en) | Electric automobile charging pile transmission gear formed by upward and outward punching movement | |
| JPH09323219A (en) | Toothed electrode for electric discharge machining and method for manufacturing the same | |
| JP2590062B2 (en) | Sintered helical gear and molding die | |
| KR20010102623A (en) | Forming process of helical gear and apparatus | |
| JPS613628A (en) | Extrusion forming device of bossed gear | |
| JP2001198646A (en) | Cold forging die and method for tooth profile parts |