JPH0261864B2 - - Google Patents
Info
- Publication number
- JPH0261864B2 JPH0261864B2 JP59019243A JP1924384A JPH0261864B2 JP H0261864 B2 JPH0261864 B2 JP H0261864B2 JP 59019243 A JP59019243 A JP 59019243A JP 1924384 A JP1924384 A JP 1924384A JP H0261864 B2 JPH0261864 B2 JP H0261864B2
- Authority
- JP
- Japan
- Prior art keywords
- indenter
- main shaft
- tooth
- die
- 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 - Lifetime
Links
- 238000005242 forging Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001175 rotational moulding Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
Classifications
-
- 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
Description
【発明の詳細な説明】
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。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a spiral bevel gear, and more particularly to forging a spiral bevel gear using a rotary forging method.
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。 Various forging methods have been attempted for spiral bevel gears, but when using a press forming machine, a large capacity press machine is required, and since the gears are twisted in the direction of the teeth, they have the disadvantage of placing a large load on the mold. In addition, in powder forging, there is a concern that strength may be insufficient due to variations in powder density in the tooth die cross section.
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つ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、プランジヤの進退に伴いプランジヤを該軸
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。 Furthermore, it is also known to manufacture the gear by a rolling method using a rotary forging machine as in Japanese Patent Publication No. 49-47621, but the disadvantage of this rolling method is that it depends on the specifications of the gear as the plunger advances and retreats. It is also necessary to change the specifications of the means (helical spline) for forcibly rotating the plunger around the axis.
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、下型の歯型部６に素材を充満させる如く鍛
造する着想を得た。 Therefore, in order to solve the above drawbacks, the inventors
As shown in FIG. 1, an upper mold indenter 2 connected to the main shaft 1 of a rotary forging machine, and a lower mold 4 having a toothed part 6 formed at the bottom of a die-carving space 5 facing the upper mold indenter. We came up with the idea of inserting the material 8 to be formed in between, and applying pressure with the upper mold indenter 2 to forge so that the toothed part 6 of the lower mold is filled with the material.
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の被成形歯部９ａは第３図の−
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１０，１
１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 forging is performed by rotating the main shaft 1 in the direction of the arrow A, which is opposite to the direction in which the teeth traces of the tooth pattern portion 6 of the lower mold are twisted outward in the radial direction, the molded product 8a is The molded tooth portion 9a is indicated by − in FIG.
As can be seen in FIG. 4, which shows the cross section, there are large under-walled parts 10, 1 on the side surface opposite to the direction of one rotation of the main shaft.
1 occurs, and a satisfactory product cannot be obtained.
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−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。 However, as shown by arrow B in FIG.
When the main shaft 1 is rotated so as to coincide with the radially outward helical direction of the tooth line of the tooth pattern portion 6, and the material 8 to be formed is rotary forged, the formed tooth portion 9b of the molded product 8b will be shaped as shown in FIG. As shown in FIG. 6, which shows a cross section, a fully satisfactory spiral bevel gear molded product 8b can be obtained without defects such as underfilling and fogging.
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の傾きをもつてみそす
り運動をするように装着されており、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
進退自在となつている。 Examples of the present invention will be described in more detail below. First, let me explain about the rotary forging machine.The rotary forging machine performs forming by scraping motion of the upper die.
It has been known for a long time, and only the main parts are in the first
As shown in the figure. Main shaft 1 shown in this figure 1
The upper die indenter 2, which is connected to the main shaft, is mounted so as to make a sliding movement at an angle θ by a drive mechanism (not shown), and the lower die 4 is moved up and down by a lifting mechanism (not shown). It can move forward and backward relative to the mold indenter 2.
下型４において、７はノツ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
このノツクアウト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 mold 4, 7 is a knockout whose upper end surface constitutes a part of the bottom surface of the mold engraving space 5. The knockout 7 is raised after completion of molding 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 engraving space 5 of the lower mold 4 is carved opposite the pressure surface 3 at the tip of the upper mold indenter 2, and the outer peripheral side of the bottom thereof is provided with desired spiral tooth-shaped teeth 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 process of forming the spiral bevel gear will be explained.
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、下型を上昇させ
る。このとき主軸１は歯筋の半径方向外側に向か
うネジレ方向に一致して回転されており、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。 The material 8 to be formed, which has been cut in advance to a predetermined volume or preformed after cutting, is inserted into the die carving space 5 as shown on the left side of FIG. 1, and then the lower die is raised. At this time, the main shaft 1 is rotated in accordance with the radially outward helical direction of the tooth trace, and as a result, the blank 8 is formed so as to fill the engraving space as shown in FIG. 7.
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。 Note that the surface marked 12 in FIG. 7 is the upper die indenter 2.
This is the indenter contact surface in contact with the pressurizing surface 3 of the indenter.
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。 As described above, according to the present invention, the material to be formed is inserted between the upper mold indenter connected to the main shaft and the lower mold in which the toothed part is formed at the bottom of the mold engraving space opposite to the upper mold indenter. Then, since rotational forging is carried out by aligning the direction of rotation of the spindle with the radially outward helical direction of the tooth trace of the tooth profile, the spiral bevel can be formed without defects such as underfill or fog in the formed tooth part. Gears can be molded.
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
ジレ方向とは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−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図の
−断面を表わす拡大断面図。第７図は回転成
形を完了したスパイラルベベルギヤーの断面図で
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。
Figure 1 is a sectional view of the main parts of a rotary forging machine. Figure 2 is an explanatory plan view of the die engraving space. FIG. 3 is an explanatory view of a molded product molded by rotating the main shaft in the opposite direction to the twisting direction of the tooth trace. FIG. 4 is an enlarged sectional view showing the - section of FIG. 3. FIG. 5 is an explanatory diagram of a molded product molded with the main axis aligned with the twist direction of the tooth trace. FIG. 6 is an enlarged sectional view showing the - section of FIG. FIG. 7 is a sectional view of the spiral bevel gear after rotational molding. (Explanation of symbols), 1...Main axis. 2...Upper mold indenter.
3...Pressure surface. 4...Lower mold. 5...Mold engraving space. 6
...dental part. 8 (8a, 8b)... Molded product. 9
(9a, 9b)... Molded tooth portion.
Claims (1)
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の回転方向を一致させ
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. Inserting the material 8 to be formed between the upper die indenter 2 connected to the main shaft 1 and the lower die 4 in which the toothed part 6 is formed at the bottom of the die carving space 5 facing the upper die indenter 2,
A method for manufacturing a spiral bevel gear using a rotary forging method, characterized in that rotational forging is then carried out by aligning the rotational direction of the main shaft 1 with the radially outward helical direction of the tooth line of the tooth pattern portion 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59019243A JPS611439A (en) | 1984-02-03 | 1984-02-03 | Production of spiral bevel gear by rotary forging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59019243A JPS611439A (en) | 1984-02-03 | 1984-02-03 | Production of spiral bevel gear by rotary forging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS611439A JPS611439A (en) | 1986-01-07 |
| JPH0261864B2 true JPH0261864B2 (en) | 1990-12-21 |
Family
ID=11993962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59019243A Granted JPS611439A (en) | 1984-02-03 | 1984-02-03 | Production of spiral bevel gear by rotary forging method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS611439A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008836B (en) * | 2017-04-11 | 2019-03-08 | 武汉理工大学 | A kind of spiral bevel gear rotary roll method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3523442A (en) * | 1967-01-20 | 1970-08-11 | Zdzislaw Marciniak | Method of producing the metal objects of variable thickness and a device for application of this method |
-
1984
- 1984-02-03 JP JP59019243A patent/JPS611439A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3523442A (en) * | 1967-01-20 | 1970-08-11 | Zdzislaw Marciniak | Method of producing the metal objects of variable thickness and a device for application of this method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS611439A (en) | 1986-01-07 |
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