JPS6099448A - Cold forging method of cylindrical gear - Google Patents

Abstract

PURPOSE:To decrease cold forging stages for a cylindrical gear and to improve productivity by using a die having projections for gear cutting meeting the tooth to be formed on the outside circumference of a rough circular cylindrical material made of a metal and a counter punch meeting the central hole of the rough circular cylindrical material. CONSTITUTION:A die 16 constituting a press machine 12 is provided with a hole 13 contg. a rough circular cylindrical material. Projections 15 for gear cutting are circumferentially provided to the intermediate part on the inside circumference of the hole 13 in accordance with teeth 14 to be formed on the outside of a work. A counter punch 18 is installed coaxially at the center of the hole 13 and is made correspondent with the hole 17 formed at the center of the work. The rough circular cylindircal material subjected to annealing and lubricating treatments is inserted into the hole 13 of a die 15 and is extruded by means of the counter punch 18 and a punch 19 by which a cup-shaped structure 20 having the teeth 14 on the outside circumference is formed. The two axial ends of the structure 20 are cut to form a cylindrical gear 21 which is subjected to a surface treatment by a carburizing method, etc. to intensify the resistance to friction.

Description

【発明の詳細な説明】 １分野」 本ＪＥ明は、円筒歯車の冷間鍛造ジノ法に関りる。[Detailed description of the invention] 1 field” This JEmei is concerned with the cold forging Zino method for cylindrical gears.

Ｌ従釆技雨フ 従来の円１！；）　ｌ’ｌｊ４　！トの冷間椴ＪΔ力法
（、上、第゛１図から第６図に示りＪ、うな製造方法が
一般に採用されていた。まｆ第１図に小す棒｛Δ１を所
定１１法にり月｛ノ１し−（９１２図の円柱状粗｛Δ２
を製造り−る。つぎに円｛−１払１１１月２に焼に１１
ｉ　Ｊ３　Ｊ、び潤ｊ１゛１処理を施し、冷間鍛造にＪ
、り第３図のカツソ゛状のワーク３を興造りる。L subordinate skill rain fu conventional yen 1! ;) l'lj4! The cold-rolled JΔ force method (shown in Figures 1 to 6 above) was generally adopted. Nirizuki {no 1 - (912 cylindrical coarse {Δ2
Manufacture. Next, yen {-1 pay 11 November 2 to bake 11
i J3 J, subjected to soaking j1゛1 treatment, J to cold forging
Then, create a cutlet-shaped workpiece 3 as shown in Figure 3.

つさ゛にカツプ，仏のワーク３をノレス加土彷にＪ、り
底床し（弟４図の円ｉｉ二）状のワーク４を１，２造り
る。Make 1 or 2 pieces of work 4 in the shape of a cup (circle ii 2 in diagram 4) with a cup on the bottom of the Buddha's work 3.

焼鈍おＪ、ひ潤ｉｉ１　％理を実施しＩＣのち弟！ン図
に小りＪ、うに１ノーク４を中心穴！ｉ−（゛支１＼−
して、外周に形１戊Ｕしめる歯にヌ・１応りる突起（；
をイｊりるダイス７に幻し（ｌｌｌＩｌ１方向に押出づ
るｊレス加工に、Ｊ、リワークＩ＋を’Ｆｌ　３１し、
つさ゛ニ’Ｌ／　’．／　１１（Ｊ）　両端’．ｒ　ｌ
ＪＪ　ｌｌｌｉ　Ｌ／　’（、、グ１Ｇ図の円筒南中９
を一形成し、ざらに浸１・｝２法、おＪ、びシ）ノン化
Ｖ．簀の表面処理にＪ、り耐ＰＩ擦１ｇ硬麿を強化しで
いた。Annealing OJ, Hijun II 1% operation and IC later brother! Small J, sea urchin 1 nok 4 in the center hole! i-(゛branch 1\-
and a protrusion that corresponds to the tooth with a U shape on the outer periphery (;
Illust it to the rework die 7 (lllIl1 direction for jless processing, J, rework I + 'Fl 31,
Tsusaini'L/'. / 11(J) Both ends'. r l
JJ llli L/'
1, } 2 method, OJ, bishi) Non-conversion V. For the surface treatment of the screen, we strengthened the surface of the screen with 1g of PI rub resistance.

」−屈従）｝一の製んｊ稈ＩＪ、銀箔か３−Ｊ稈：Ｌた
１ｊ塑性変形さける為に焼鈍おｊ、び潤滑処理ｆｊ　２
１＋−稈と工程数が多いので生産性が悪いという欠Ｌ＋
ｊがあっｌこ。” - yielding)} 1st culm IJ, silver foil 3-J culm: L 1j annealing and lubrication treatment to avoid plastic deformation 2
1+-Lack of poor productivity due to the large number of culms and processes L+
j is here.

［発明の１］的」 本発明の目的は、上記従来の欠貞を改１夏しく鍛造］二
程を減らＪ゛とともに焼鈍おＪ、び潤滑処理の工程を減
らＪことができ、生産性の向−１−１］ストダウンおよ
び設備の省力化が可能となる円筒歯巾の冷間鍛造ノ）法
のｊＶ供にある。[Object of the Invention 1] The object of the present invention is to improve the productivity by reducing the steps of annealing and lubrication treatment as well as reducing the number of forging processes described above. Direction-1-1] The present invention is based on the method of cold forging of cylindrical tooth width, which enables work-down and labor saving of equipment.

１、発明の４ｉ４成］ 本発明は、所定１Ｊ法の金属肺内＋１相月を焼鈍おにび
潤滑処理Ｊ−る工程ど、所定のプレス機を用いてＪ外周
に形成萌しめる周状の山に対応Ｊ°る（！［：Ｉ切用突
起を右りるダイスと中心穴に対応りるカウンタバンヂに
対して１１１目；Ｌ！　Ｉ”Ｊ　’＋１相４Ａを軸方向
に押出して、外周の歯と内側の穴を同時に鍛造する」稈
と、外周に歯が形成されるとどしに内側に穴か形成され
たカップ状の鍛造物を軸り向両端ですＪ断し−（所定１
１法の円１；−１歯車を形成りる」−稈ど、浸炭法、シ
アン化ン去舌により表面に耐摩擦４’ｌ硬化層を漬る１
稈とから４７４成される。1. 4i4 Formation of the Invention] The present invention provides a process for annealing and lubricating the inside of the metal lung of the predetermined 1J method. J° corresponding to the mountain (! [: I cut the protrusion to the right with the die and the counter bandage corresponding to the center hole, 111st; L! I"J '+1 Extrude phase 4A in the axial direction A cup-shaped forged product with holes formed on the inside at the same time as the teeth are formed on the outer periphery is forged at both ends in the axial direction.
Circle 1 of method 1;-1 Forming a gear"-Culm, carburizing method, cyanide removal tongue soaking a friction-resistant 4'l hardened layer on the surface 1
It is made up of 474 culms.

［発明の効果］ 本発明【よ上記４７４成をｆｊりるの−Ｃ・つざの効果
を表４９４　。[Effects of the Invention] Table 494 shows the effects of the above 474 compositions of the present invention.

本発明の円１１拍“）１中の冷間、９（２逍乃法は、従
来の製造工程と比較して鍛造が３］：稈から１工程へ、
Ｊ、た焼鈍および潤滑が２１稈から１土程へど人１１」
に［！！ｉ略化でき、生産性の向」、二」ストタウン、
設値Ｉの省力化が可能とイｆる。The circle of the present invention is 11 beats") Cold work in 1, 9 (2) Forging is 3 compared to the conventional manufacturing process]: From the culm to the 1st process,
J, annealing and lubrication took place from 21 culms to 1 soil.
To [! ! It can be simplified and productivity can be improved.
It is possible to save labor for setting value I.

［実ｈ（！１例］ つさ゛に本発明をり１７図・−第１０図に承り製造Ｌ−
稈の一実施例に桔づさ説明り−る。[Actual (! 1 example) The present invention has been applied to Figure 17 - Figure 10 shows manufacturing L -
An example of a culm is explained below.

第７図は鍛造され１５：棒状の鉄装相＋Ａ１０℃あり、
この棒状相４Ａ１０を所定の長さに切１１ｉｉ　Ｌ／−
（第８図の円社粗４Ａ１１を製造りる。゛つざに中１！
Ｉ変形さける為に冷間鍛造の前処１！ＩＩどしく円柱粗
材１１に焼鈍ａ５Ｊ、びａ７１滑処理を実施Ｊる。つさ
゛に第９図に小りＪ、うな所定のプレス１幾１２Ｃ゛ワ
ークリイｄ〕ら円柱粗材１１を押出し加１−りる。この
プレス機１２は、前記円４］粗材１１（！：内１■Ｊる
穴１３を備え、該穴１３の内周中間部に、ワーク外側に
形成ｕしめる爾１４に対応して周設された歯切用突起１
５を備えるダイス１６と、ワーク中心に形成ｌしめる穴
１１に対応し°（、前記穴１３の中心に同軸に設首され
る円４１状力ウンタバンヂ１８と、上記穴１３に吹合し
、上方から前記ワーク′す°なわら円柱粗材１１を１・
−ｈへ押出りるパンＪ１９とから４１４成される。上記
押出し加」−に１、り外周に爾１４を有りるカップ状鍛
造物２０が形成される。つぎにカップ状鍛造物２０の軸
り向両端を切断した第１０図に示り一円筒歯中２１を形
成゛４る。つぎに浸炭法（固体浸炭法、液体浸疾払おＪ
、びカス浸炭ｖＡ）またはシアン化法等の表面処理によ
り円筒歯巾２１の耐ｌｌ／！擦竹映１哀を強化り−る。Figure 7 shows forged 15: rod-shaped iron phase +A10℃,
Cut this rod-shaped phase 4A10 into a predetermined length 11ii L/-
(The Ensha coarse 4A11 shown in Figure 8 is manufactured.) First year of junior high school!
I Preliminary step of cold forging to avoid deformation 1! II. The cylindrical rough material 11 is subjected to annealing a5J and a71 smoothing treatment. Finally, as shown in FIG. 9, a cylindrical blank material 11 is extruded from a predetermined press 1 and 12C. This press machine 12 is equipped with a hole 13 having the above-mentioned circle 4] rough material 11 (!: 内1■J), and a hole 14 formed around the inner circumference of the hole 13 corresponding to the hole 14 formed on the outside of the workpiece. gear cutting protrusion 1
A die 16 with a hole 11 formed in the center of the workpiece and a round 41-shaped force untabundge 18 coaxially installed in the center of the hole 13, and a die 16 with From the workpiece, the straw cylindrical rough material 11 is
414 is made from pan J19 which is extruded to -h. A cup-shaped forged product 20 having a radius 14 on the outer periphery is formed by the extrusion process. Next, as shown in FIG. 10, in which both axial ends of the cup-shaped forged product 20 are cut, one cylindrical tooth core 21 is formed. Next, carburizing method (solid carburizing method, liquid carburizing method)
The resistance of the cylindrical tooth width 21 is improved by surface treatment such as carburization vA) or cyanidation method. Suritake Ei 1 strengthens the sadness.

【図面の簡単な説明】[Brief explanation of the drawing]

第″１図、２図、３′Ｓ図、４図、５３図、６（ネＩは
従来の冷間鍛造方法の製造上程図、負〕７図、８図、９
図、１０図は４−発明にかかる冷間鍛造り法の製造工程
図である。 図中　１０・・・鈴、製相（Ａ１１・・・円４目１１月
　１２・・・ノルレス敗　１３・・・穴　１４・・・歯
　１５・・・歯切用突起　１Ｇ・・・夕′イス　１８・
・・円（１人カウンタバンブ　１９・・・〕くンジブ−
２０・・カップ状鍛造物 代理人　Ｌｉ黒１）１に 第１図　第２図 第３図　第４図 ■■ 第５ド１ 第６か［１ 第７図 ０ 第８図 １Figures 1, 2, 3'S, 4, 53, 6 (N I is a manufacturing process diagram of the conventional cold forging method, negative) 7, 8, 9
Figures 4 and 10 are manufacturing process diagrams of the cold forging method according to the 4-invention. In the figure 10... Bell, phase (A11... Circle 4th November 12... Norless loss 13... Hole 14... Teeth 15... Gear cutting protrusion 1G... Even' Chair 18・
・・Yen (1 person counter bang 19...) Kunjibu -
20... Cup-shaped forging agent Li black 1) 1 Fig. 1 Fig. 2 Fig. 3 Fig. 4 ■■ 5th do 1 6th [1 Fig. 7 0 Fig. 8 1

Claims (1)

【特許請求の範囲】[Claims] １）所定−ｚＪ法の金属装置１月Ｊ粗Ｕを焼ｓ１ムｄ３
Ｊ、（Ｊ’　１ｌｆｆＪ？青処理りる１稈と、所定のプ
レス機を用いて、外周に形成μしぬる周状の山に対応り
る歯切用突起を有り−るダイスと中心穴に対応づ−るカ
ウンタパンチに対し−（前記円４：１″Ａ１１月を軸方
向に押出しく、外周の爾と内側の穴を同１１．１に鍛）
６りる工程と、外周に歯が形成されるととしに内側に穴
が形成されたカップ状の鍛造物を輔ノ）向両端ひ切断し
Ｃ所定刈払の円筒歯車を形成りる工程と、浸ｖＪ法、ジ
ノ′ン化法等により表面に１ｌ１４摩際性硬化層を〕：
５る工程とからなる円筒歯車の冷間鍛］貴り法。1) Predetermined - zJ method metal equipment January J rough U s1 m d3
J, (J' 1lffJ? Using one culm of blue-treated rill and a specified press machine, form μ on the outer periphery and a die with gear cutting protrusions corresponding to the circumferential peaks and the center hole. For the corresponding counter punch (push out the circle 4:1"A1 in the axial direction, punch the outer circumference and the inner hole to the same 11.1")
A step of cutting off both ends of a cup-shaped forged product with teeth formed on the outer periphery and a hole formed on the inside to form a cylindrical gear with a predetermined cutting rate. , 1l14 abrasive hardened layer on the surface by immersion VJ method, dinonization method, etc.]:
[Cold forging of cylindrical gears] Nokari method, which consists of 5 steps.