JPH02129304A - Sintered synchronizer ring and manufacture thereof - Google Patents
Sintered synchronizer ring and manufacture thereofInfo
- Publication number
- JPH02129304A JPH02129304A JP27938588A JP27938588A JPH02129304A JP H02129304 A JPH02129304 A JP H02129304A JP 27938588 A JP27938588 A JP 27938588A JP 27938588 A JP27938588 A JP 27938588A JP H02129304 A JPH02129304 A JP H02129304A
- Authority
- JP
- Japan
- Prior art keywords
- chamfer
- tooth
- sintered
- ridge line
- sizing
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000004513 sizing Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000011812 mixed powder Substances 0.000 claims abstract description 5
- 230000001590 oxidative effect Effects 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 11
- 150000002505 iron Chemical class 0.000 abstract 2
- 239000011800 void material Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 description 22
- 238000005242 forging Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 101150097247 CRT1 gene Proteins 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001309 Ferromolybdenum Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/02—Arrangements for synchronisation, also for power-operated clutches
- F16D23/025—Synchro rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野Ｊ
この発明は、自動車等の手動変速機に付帯する同期装置
部品であるシンクロナイザリングおよびその製造方法に
関するものであり、特にトラックなど中高荷重用に使用
できる鉄系焼結合金で作られたシンクロナイザリングに
係わる。[Detailed Description of the Invention] [Industrial Field of Application J This invention relates to a synchronizer ring, which is a synchronizer component attached to a manual transmission of an automobile, etc., and a method for manufacturing the same, and particularly relates to a synchronizer ring that is a synchronizer component attached to a manual transmission of an automobile, etc. It relates to synchronizer rings made of usable iron-based sintered alloys.
［従来の技術１
シンクロナイザリングはトランスミッションの主要機能
部品の一つであり、シフトチェンジの際に各々回転数の
異なるアウトプットギヤとアウトプットシャフトの回転
を摩擦力をｆす用して同期させるのに用いられる同期装
置部品で、第２図に示すように歯６の片方の側端面２は
チャンファ形状をしている。[Conventional technology 1] A synchronizer ring is one of the main functional parts of a transmission, and is used to synchronize the rotation of the output gear and output shaft, which have different rotation speeds, by using frictional force during a shift change. In the synchronizer component used, one side end surface 2 of the tooth 6 has a chamfer shape, as shown in FIG.
シンクロナイザリングは、スリーブ側のチャンファ付き
スプラインと噛み合う際、最初に両者のチャンファ部で
噛み合うため（インデックス状態という）、機械的強度
が高く耐摩耗性が要求される部品である。When the synchronizer ring engages with the chamfered spline on the sleeve side, it first engages at the chamfered portions of both (referred to as index state), so it is a component that is required to have high mechanical strength and wear resistance.
従来のシンクロナイザリングは、溶製鋼合金を一部鍛造
または縁切削加工して作られたものが最も一般的であり
１乗用車から大型トラックまで使用されている。Conventional synchronizer rings are most commonly made by partially forging or edge cutting a molten steel alloy, and are used in everything from passenger cars to large trucks.
しかし、材料歩留りが悪く他の材料に比べ地金コストが
高いこと、および特に大型トラックにおいてはエンジの
高馬力化に伴う負荷の増大、車両の長寿命化、シフトフ
ィーリングの改善要求などにより同期装置に対する性能
向上が要望されていることから、溶製鉄系材料を熱処理
または表面処理したものを採用している例も多い。However, due to poor material yield and high metal cost compared to other materials, and especially in large trucks, there is a demand for increased loads due to higher engine horsepower, longer vehicle life, and improved shift feel. Due to the demand for improved performance of equipment, there are many examples of using molten iron-based materials that have been heat-treated or surface-treated.
この場合も同様に塑性加工により造形されており、リン
グ状に加工した炭素量がＯ，１〜０．５重量％の溶製鋼
材を温間または冷間鍛造して作られる。In this case as well, it is shaped by plastic working, and is made by warm or cold forging a ring-shaped molten steel material with a carbon content of 0.1 to 0.5% by weight.
また、粉末冶金法による造形も採用されており、同様な
炭素鋼組成の通常の焼結製品と同様な方法で作ったもの
、または焼結合金をリング状または仕上がり形状に近似
した歯付き素材に成形し、熱間鍛造により部材全体を高
密度にする方法により作られ、材料歩留まり、造形性の
面で優れている。Powder metallurgy is also used to create products that are made in the same way as ordinary sintered products with similar carbon steel compositions, or made from sintered alloys into ring-shaped or toothed materials that approximate the finished shape. It is made by molding and hot forging to increase the density of the entire member, and is excellent in terms of material yield and formability.
［発明が解決しようとする課題］
鉄系材料で作られたシンクロナイザリングにおいて、溶
製鋼材を鍛造したものは強度、耐摩耗性および材料費の
点で良好である半面、製造する際に材料の歩留りが悪い
、何段階かの塑性加工を要するため仕上がるまでの工程
数が多い、高い塑性加工圧力を必要とするため設備が高
価であり金型寿命が短い等、総コストが高額となってい
る。[Problems to be solved by the invention] Among synchronizer rings made of iron-based materials, those forged from molten steel are superior in terms of strength, wear resistance, and material costs; The total cost is high as the yield is poor, the number of steps required to complete the process is large as it requires several stages of plastic working, the equipment is expensive and the life of the mold is short due to the high plastic working pressure required. .
一方、焼結鍛造法によれば、素材形状を適宜仕上がり形
状に近似させることが容易であるからその分だけ歩留り
が良いという特長があるが、その他は溶製鋼材を鍛造す
る場合とほぼ同様であり、また、特性においては、鍛造
後の部材表層部分は空孔が多くなる現象があり、チャン
ファの稜線近傍の密度が低くなることによってピッチン
グ摩耗を生じやすいという欠点があった。On the other hand, according to the sinter forging method, it is easy to appropriately approximate the shape of the material to the finished shape, so it has the advantage of a better yield, but other aspects are almost the same as forging molten steel. In addition, in terms of characteristics, there is a phenomenon in which the surface layer of the member after forging has a large number of pores, and the density near the chamfer ridgeline is low, making pitting wear likely to occur.
上述のような状況に鑑み、本発明は鉄系材料で作られた
中高荷重用のシンクロナイザリングを対象とし、通常の
焼結製品を採用し、材料歩留まりが良く、安価で、かつ
、軽量で要部の耐摩耗性が優れた鉄系焼結シンクロナイ
ザリングおよびその製造方法を提供するすることを目的
とするものである。In view of the above-mentioned situation, the present invention targets a synchronizer ring for medium and high loads made of iron-based materials, which uses a normal sintered product, has a good material yield, is inexpensive, lightweight, and has a compact design. The object of the present invention is to provide an iron-based sintered synchronizer ring with excellent wear resistance and a method for manufacturing the same.
〔課題を解決するための手段］
本発明はトランスミッション用焼結シンクロナイザリン
グであって、鉄系焼結合金からなり、ボス部外径と歯部
チャンファ稜線の交点を基点に歯部チャンファ稜線から
歯車内部側に角度１０〜３０度の範囲内の歯部内の空孔
率３％以下の緻密域と、他の歯部およびボス部の平均空
孔率が１０〜１５％である領域とからなることを特徴と
する。[Means for Solving the Problems] The present invention is a sintered synchronizer ring for a transmission, which is made of an iron-based sintered alloy, and is made of a ferrous sintered alloy. Consisting of a dense region with a porosity of 3% or less within the teeth within an angle range of 10 to 30 degrees on the inner side, and a region with an average porosity of 10 to 15% in the other teeth and boss portions. It is characterized by
本発明の製造方法は、鉄系金属粉末を主体とする混合粉
を押型で仕上り形状に近似した歯車形状に成形し、通常
用いられるアンモニア分解ガスなどの非酸化性ガス雰囲
気中で焼結したのち、冷間で所定形状にサイジングする
工程を含む通常の製造方法を採用し、このとき、成形体
の歯部チャンファ形状を、チャンファの歯元部より順次
歯先部のコイニング化が大きくなるように、歯部チャン
ファ稜線のボス付け根を基点とするサイジング後のチャ
ンファ稜線に対して角度１５〜４０度の範囲でチャンフ
ァ稜線を高く形成しておき、かつ全体密度を６．６〜７
．１ｇ／ｃｒｎ’とすることを特徴とする。この方法で
は、チャンファ部、特にその歯先側を積極的ににコイニ
ングすることにより、シンクロナイザリングは歯部のチ
ャンファ稜線からその稜線のボス付け根を基点に角度１
０〜３０度の範囲内のチャンファ歯部内空孔率が３％以
下（密度に換算して約７．６ ｇ ／ ｃ ｒｔ１以上
）となる。The manufacturing method of the present invention involves forming a mixed powder mainly composed of iron-based metal powder into a gear shape that approximates the finished shape using a press mold, sintering it in a non-oxidizing gas atmosphere such as a commonly used ammonia decomposition gas, and then , a normal manufacturing method including a process of cold sizing into a predetermined shape is adopted, and at this time, the tooth chamfer shape of the molded body is changed so that the coining of the tip of the chamfer becomes larger in order from the root of the chamfer. , the chamfer ridge line is formed at a high angle within the range of 15 to 40 degrees with respect to the chamfer ridge line after sizing based on the boss root of the tooth chamfer ridge line, and the overall density is 6.6 to 7.
．． It is characterized by being 1g/crn'. In this method, by actively coining the chamfer part, especially the tip side of the tooth, the synchronizer ring is rotated at an angle of 1 from the chamfer ridge of the tooth to the base of the boss of that ridge.
The porosity within the chamfer tooth portion within the range of 0 to 30 degrees is 3% or less (approximately 7.6 g/crt1 or more in terms of density).
［作用］
本発明に係わる焼結シンクロナイザリングの材質は、高
負荷用を目標としたものであり、鉄系である０通常のＦ
ｅ −Ｃｕ −Ｃ系や、Ｃｒ、Ｍｏ、Ｖ、Ｗ、Ｎｉ、
Ｃｏ等を適宜添加して強靭化された材料が望ましい。[Function] The material of the sintered synchronizer ring according to the present invention is aimed at high-load applications, and is iron-based.
e -Cu -C system, Cr, Mo, V, W, Ni,
It is desirable to use a material that is toughened by appropriately adding Co or the like.
なお、このシンクロナイザリングを使用する場合は、全
体または歯部だけを熱処理するか、または軟窒化処理等
の表面処理を施すことは従来と同様である。Note that when using this synchronizer ring, the entire ring or only the tooth portions may be heat treated or surface treated such as nitrocarburizing treatment, as in the conventional case.
次に、サイジング前のチャンファ稜線を高（形成するこ
とにより、チャンファ部は他の部分よりコイニング代が
大きくなり、密度が高くなることを説明する。Next, it will be explained that by forming a high chamfer ridge line before sizing, the coining allowance in the chamfer part becomes larger than in other parts, and the density becomes higher.
第１図は第２図の焼結のシンクロナイザリングの部分断
面図である。1 is a partial cross-sectional view of the sintered synchronizer ring of FIG. 2; FIG.
歯部６のチャンファ２のサイジング前の稜線３のボス付
け根部を基点とするサイジング後のチャンファ稜線４に
対する角度θ（以下コイニング角と言う）が１５度より
少ないと、チャンファ部の高密度領域が少なくなり耐摩
耗性が不十分になる。コイニング角θを４０度より大き
く形成すると、粉末成形の際に稜線３の先端部分が低密
度になり欠けを生じ易くなり、また、歯部全体が高密度
化する傾向になるにつれ、コイニング時に高い圧力を必
要とじ押型が破損する虞が増加するので好ましくない。If the angle θ of the tooth portion 6 with respect to the chamfer ridge line 4 after sizing (hereinafter referred to as the coining angle) is less than 15 degrees, the high-density region of the chamfer portion is As a result, wear resistance becomes insufficient. If the coining angle θ is formed larger than 40 degrees, the tip portion of the ridge line 3 will have a low density during powder compaction and will be prone to chipping. This is not preferable because it requires pressure and increases the possibility that the mold will be damaged.
高密度化した部分以外の歯部およびボス部の平均密度は
５通常の粉末成形および焼結で得られる６、６〜７．１
ｇ／ｃｒｎ’である。焼結後の゛空孔率に換算すると約
ｌＯ〜１５％に相当する。この密度が低過ぎるとシンク
ロナイザリングとして強度不足であり、高すぎると成形
が困難であると共に重量が重くなって材料が無駄となり
、コストアップにつながる。また、適度な空孔は潤滑油
を充填することができ、摺動摩擦を軽減する。The average density of the teeth and bosses other than the highly densified parts is 5, which is obtained by normal powder compacting and sintering, and 6 to 7.1.
g/crn'. The porosity after sintering corresponds to about 10 to 15%. If this density is too low, the synchronizer ring will not have enough strength, and if it is too high, it will be difficult to mold and will be heavy, resulting in wasted material and increased costs. In addition, appropriate pores can be filled with lubricating oil to reduce sliding friction.
焼結体をチャンファを形成させる歯形を持つグイキャビ
ティに、チャンファ部を下にして挿入し加圧すると、焼
結体は歯先チャンファ稜線部から順に塑性変形する。仕
上がりチャンファ形状になると、焼結体のチャンファ角
度と全体密度に相応してチャンファ部の近傍の密度は上
昇する。When a sintered body is inserted into a hollow cavity having a tooth profile that forms a chamfer with the chamfer portion facing down and pressurized, the sintered body is plastically deformed sequentially from the chamfer ridgeline at the tooth tip. When the final chamfer shape is achieved, the density near the chamfer portion increases in accordance with the chamfer angle and the overall density of the sintered body.
この密度が高い領域は、チャンファ稜線部の歯筋方向断
面を顕微鏡組織で観察した空孔率で表すことができ、特
性に影響する。空孔率３％以下の部分が、チャンファ稜
線のボス付け根を基点としてチャンファ稜線４と緻密領
域＄１５とのなす角度α（以下この角度を緻密領域角と
いう）が１０度に満たないと、シンクロナイザリングを
使用したとき、へたり摩耗またはピッチング摩耗が起こ
り易く、また、剪断応力が増加するとチャンファ部が破
断することがある。This high-density region can be expressed by the porosity observed in a cross section of the chamfer ridge in the tooth trace direction using a microscopic structure, and affects the properties. In a part with a porosity of 3% or less, if the angle α between the chamfer ridge 4 and the dense region $15 (hereinafter referred to as the dense region angle) is less than 10 degrees with the boss base of the chamfer ridge as the base point, the synchronizer When a ring is used, it tends to suffer from settling wear or pitting wear, and when shear stress increases, the chamfered portion may break.
一方、緻密領域角αが３０度を越えると、特にシンクロ
ナイザリングの全体密度を高めに設定した場合に、歯部
全体の密度が過度に上昇するため、加圧力が急上昇し押
型の摩耗を早めその破損の虞が増加する。On the other hand, if the dense area angle α exceeds 30 degrees, especially if the overall density of the synchronizer ring is set to be high, the density of the entire tooth portion will increase excessively, and the pressing force will increase rapidly, accelerating the wear of the die. The risk of damage increases.
〔実施例〕
以下、図面を参照して本発明を実施例により詳細に説明
する。[Examples] Hereinafter, the present invention will be explained in detail by examples with reference to the drawings.
まず、アトマイズ鉄粉、フェロモリブデン扮、カーボニ
ルニッケル粉、電解銅粉、黒鉛粉およびステアリン酸亜
鉛扮を準備し、焼結体の組成が４％Ｎｉ−１，５％Ｃｕ
−０，５％Ｍ ｏ −０，６％Ｃ−残りＦｅ、になる
ように混合粉を作成した。First, atomized iron powder, ferromolybdenum powder, carbonyl nickel powder, electrolytic copper powder, graphite powder, and zinc stearate powder were prepared, and the composition of the sintered body was 4%Ni-1.5%Cu.
A mixed powder was prepared so as to have the following: -0.5% Mo -0.6% C - remaining Fe.
成形は通常の押型を用い、成形体の形状は、第２図に示
すような仕上がり形状に近似しており、内径寸法７７ｍ
ｍ１．全長寸法１５ｍｍ、ボス部外縁９７ｍｍ、歯先径
寸法１０１ｍｍ、でチャンファ付きである。The molding was carried out using a normal mold, and the shape of the molded product approximated the finished shape shown in Figure 2, with an inner diameter of 77 m.
m1. It has a total length of 15 mm, an outer edge of the boss portion of 97 mm, a tooth tip diameter of 101 mm, and is equipped with a chamfer.
成形体のチャンファ形状は、第１図に示すコイニングθ
を１０＠ ２０’ ３０’ ４０”の４種類とし、
全体密度を６．６ｇ／ｃｒｎ’、６．９ｇ／ｃｒｎ’、
および７．１ｇ／ｃｒｒ？とじて組み合わせ、都合１２
種類の成形体を作成した。The chamfer shape of the compact is coined θ as shown in Figure 1.
There are four types: 10@20'30'40",
The overall density is 6.6 g/crn', 6.9 g/crn',
and 7.1g/crr? Bind and combine, convenience 12
Various types of molded bodies were created.
次いで、この成形体をブタン変成ガス中、温度１１５０
℃で焼結し、サイジング試料に供した。Next, this molded body was heated at a temperature of 1150 in a butane converted gas.
It was sintered at ℃ and used as a sizing sample.
サイジング方法は、第３図に示す押型で行った。第３図
（ａ）は、焼結体９をダイ１０のキャビティに挿入した
状態を示し、第３図（ｂ）はバンチ１１．１２による圧
縮完了の状態を示している。なお、密度が高くなってサ
イジング圧力が急上昇したものは、加圧を途中で中断し
た。The sizing method was performed using a pressing die shown in FIG. FIG. 3(a) shows the state in which the sintered compact 9 is inserted into the cavity of the die 10, and FIG. 3(b) shows the state in which compression by the bunches 11 and 12 is completed. Note that in cases where the density increased and the sizing pressure suddenly increased, pressurization was interrupted midway.
第１表は所定寸法にサイジングした後の歯部だけを切断
して取り出し、その密度を測定した結果を示す、また、
第４図は、歯部をチャンファの稜線から加圧方向に切断
した面を顕微鏡で観察して画像解析し、空孔の面積比が
３％以下の領域を求め、その領域を緻密領域角α（第１
図参照）で表わしたものである。Table 1 shows the results of cutting and taking out only the tooth portion after sizing it to a predetermined size, and measuring its density.
Figure 4 shows the surface of the tooth section cut from the ridgeline of the chamfer in the pressure direction, observed with a microscope, image analyzed, a region where the area ratio of pores is 3% or less is determined, and the region is defined at a dense region angle α (1st
(see figure).
なお、素材の全体密度が７．１ｇ／ｃｒｒ？でコイニン
グ角θが４０度の試料は、サイジングの途中で加圧力が
急上昇したので測定試料にしなかった。In addition, the overall density of the material is 7.1g/crr? The sample with a coining angle θ of 40 degrees was not used as a measurement sample because the pressing force suddenly increased during sizing.
当然のことではあるが、素材の全体密度とコイニング角
との組合わせによって成形後の比重が材料の真比重以上
となるような条件（素材の全体密度とコイニング角の組
合わせ）は本発明から除外される。Naturally, the conditions (combination of the overall density of the material and the coining angle) such that the specific gravity after molding becomes greater than or equal to the true specific gravity of the material due to the combination of the overall density of the material and the coining angle are based on the present invention. Excluded.
第１表のように、コイニング角０を大きくしコイニング
量が増えると南部の密度は上昇する。As shown in Table 1, as the coining angle 0 increases and the amount of coining increases, the density in the southern part increases.
また、第４図から分かるように、コイニング角θが大き
いほど緻密領域角αが増大し、素材密度が高いほど緻密
領域角αが大きくなりやすい。Further, as can be seen from FIG. 4, the larger the coining angle θ, the larger the dense area angle α, and the higher the material density, the easier the dense area angle α becomes larger.
次に、緻密領域角αが７度（比較例）、１２度（実施例
）ｉ３よび３１度（実施例）の試料の内径および端面を
所定形状に切削加工し、浸炭焼き入れおよび焼き戻しし
、トランスミッションに組込んで台上試験をした。Next, the inner diameters and end faces of the samples with the dense region angle α of 7 degrees (comparative example), 12 degrees (example) i3, and 31 degrees (example) were cut into predetermined shapes, and then carburized and quenched and tempered. A bench test was conducted by incorporating it into a transmission.
比較材は焼結鍜造品であり、組成が同一の焼結体を加熱
したのち鍛造し、同様に所定形状に加工して熱処理した
ものである。The comparative material is a sintered product, which is obtained by heating and forging a sintered body having the same composition, and similarly processing it into a predetermined shape and heat-treating it.
これら試料の性状を第２表に示す。The properties of these samples are shown in Table 2.
台上試験は、モータによりプロペラシャフトを介して、
リヤ側からトランスミッションに入力され、トルク変動
を防ぐためフライホイールを組み込んで行った。シフト
操作はリンクを介してレバーにて行うが、エアシリンダ
により自動操作される構造をしている。耐久性能は、目
標とするシフト回数終了後、シンクロナイザリングの摩
耗および精度等を調査して評価した。The bench test is performed by a motor through the propeller shaft.
Input is input to the transmission from the rear side, and a flywheel was incorporated to prevent torque fluctuations. Shifting is performed using a lever via a link, but the structure is such that it is automatically operated using an air cylinder. Durability was evaluated by examining the wear and accuracy of the synchronizer ring after completing the targeted number of shifts.
その結果、試料ｌ （比較例）が最も摩耗変形か太き（
、ついで比較材で、試料２ｉ５よび試料３（実施例）は
摩耗が少なかった。この傾向は、チャンファ部の緻密性
とその深さに関係していると考えられ、比較材のように
全体密度が高くても表面層に空孔が多いと摩耗している
。また、試料ｌのように緻密層が薄い場合は、その下層
で面圧による剪断現象を起こしピッチング摩耗し易く、
大きな摩耗量になっていると考察される。As a result, sample l (comparative example) had the most wear deformation or thickest (
Next, among the comparative materials, Sample 2i5 and Sample 3 (Example) had less wear. This tendency is thought to be related to the density and depth of the chamfered part, and even if the overall density is high like the comparative material, if there are many pores in the surface layer, it will wear out. In addition, when the dense layer is thin like sample 1, shearing phenomenon due to surface pressure occurs in the layer beneath it, which tends to cause pitting wear.
It is considered that the amount of wear is large.
従ってチャンファ部の緻密領域角αは１０度以上は必要
で、そのためには、コイニング角θは１５度以上が必要
である。Therefore, the dense region angle α of the chamfer portion needs to be 10 degrees or more, and for that purpose, the coining angle θ needs to be 15 degrees or more.
以上説明したように本発明のシンクロナイザリングは、
通常の粉末冶金法を採用し、これに改良された造形手段
を付加することにより、要部を緻密化させ他の部分を比
較的に低い密度に構成したものであるから、従来品より
重量が１０〜１５％軽く、しかも耐久性が優れていると
共に、製造コストが低いという特徴があり、中高負荷用
トランスミッションの要求に合致するものである。As explained above, the synchronizer ring of the present invention is
By adopting the usual powder metallurgy method and adding an improved shaping method, the main parts are made denser and the other parts are constructed with a relatively lower density, so it weighs less than conventional products. It is 10 to 15% lighter, has excellent durability, and has low manufacturing costs, meeting the requirements for medium- and high-load transmissions.
第１図は本発明の製造方法を説明するシンクロナイザリ
ングの部分断面図、第２図は一例のシンクロナイザリン
グの斜視図、第３図はサイジング方法を説明するダイの
要部断面図、第４図はコイニング角θと緻密領域角αの
関係を表わすグラフである。Fig. 1 is a partial sectional view of a synchronizer ring to explain the manufacturing method of the present invention, Fig. 2 is a perspective view of an example of the synchronizer ring, Fig. 3 is a sectional view of main parts of a die to explain the sizing method, and Fig. 4 is a graph showing the relationship between the coining angle θ and the dense area angle α.
Claims (1)
ァ稜線の交点を基点に歯部チャン ファ稜線から歯車内部側に角度１０〜３０度の範囲内の
歯部内の空孔率３％以下の緻密領域と、他の歯部および
ボス部の平均空孔率が１０〜１５％である領域とからな
ることを特徴とするトランスミッション用焼結シンクロ
ナイザリング。 ２ 鉄系金属粉末を主体とする混合粉を押型で仕上り形
状に近似した歯車形状に成形するに際し、成形体の歯部
チャンファ稜線をサイジング後のチャンファ稜線に対し
て稜線のボス付け根を基点に角度１５〜４０度になるよ
うチャンファ丈を歯先に向かって順次高く形成するとと
もに成形体の全体密度を６．６〜７．１ｇ／ｃｍ＾３と
し、この成形体を非酸化性ガス雰囲気で焼結した後、冷
間でチャンファ部を コイニングし所定歯車形状にサイジングすることを特徴
とする焼結シンクロナイザリングの製造方法。[Claims] 1. Made of iron-based sintered alloy, the inside of the tooth is within an angle of 10 to 30 degrees from the tooth chamfer ridge line to the inside of the gear, starting from the intersection of the boss part outer diameter and the tooth chamfer ridge line. A sintered synchronizer ring for a transmission, comprising a dense region with a porosity of 3% or less, and a region with an average porosity of 10 to 15% in other tooth portions and boss portions. 2. When molding a mixed powder mainly composed of iron-based metal powder into a gear shape that approximates the finished shape using a press mold, the chamfer ridgeline of the teeth of the compact is angled with respect to the chamfer ridgeline after sizing based on the base of the boss of the ridgeline. The chamfer length is gradually increased toward the tooth tip so that the length is 15 to 40 degrees, and the overall density of the compact is set to 6.6 to 7.1 g/cm^3, and this compact is sintered in a non-oxidizing gas atmosphere. A method for producing a sintered synchronizer ring, which comprises cold coining the chamfered portion after sintering and sizing it into a predetermined gear shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27938588A JPH07116491B2 (en) | 1988-11-07 | 1988-11-07 | Sinter synchronizer ring and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27938588A JPH07116491B2 (en) | 1988-11-07 | 1988-11-07 | Sinter synchronizer ring and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02129304A true JPH02129304A (en) | 1990-05-17 |
| JPH07116491B2 JPH07116491B2 (en) | 1995-12-13 |
Family
ID=17610404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27938588A Expired - Lifetime JPH07116491B2 (en) | 1988-11-07 | 1988-11-07 | Sinter synchronizer ring and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07116491B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011041811A1 (en) * | 2009-10-07 | 2011-04-14 | Miba Sinter Austria Gmbh | Sintered coupling ring |
| FR3039604A1 (en) * | 2015-07-28 | 2017-02-03 | Hoerbiger Antriebstechnik Hold | |
| CN107477105A (en) * | 2017-08-28 | 2017-12-15 | 陕西法士特汽车传动集团有限责任公司 | A kind of synchronizer locking structure |
-
1988
- 1988-11-07 JP JP27938588A patent/JPH07116491B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011041811A1 (en) * | 2009-10-07 | 2011-04-14 | Miba Sinter Austria Gmbh | Sintered coupling ring |
| JP2013507581A (en) * | 2009-10-07 | 2013-03-04 | ミバ・ジンテル・オーストリア・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Sintered connecting ring |
| US8668066B2 (en) | 2009-10-07 | 2014-03-11 | Miba Sinter Austria Gmbh | Sintered coupling ring |
| FR3039604A1 (en) * | 2015-07-28 | 2017-02-03 | Hoerbiger Antriebstechnik Hold | |
| CN107477105A (en) * | 2017-08-28 | 2017-12-15 | 陕西法士特汽车传动集团有限责任公司 | A kind of synchronizer locking structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07116491B2 (en) | 1995-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5390414A (en) | Gear making process | |
| US5754937A (en) | Hi-density forming process | |
| JP2648519B2 (en) | Method of manufacturing synchronizer hub | |
| JP4789837B2 (en) | Iron-based sintered body and manufacturing method thereof | |
| US4251273A (en) | Method of forming valve lifters | |
| US6148685A (en) | Duplex sprocket/gear construction and method of making same | |
| US4954171A (en) | Composite alloy steel powder and sintered alloy steel | |
| JPH03170644A (en) | Iron sintering material, valve seat insert and its manufacture | |
| JP2007262536A (en) | Sintered gear and its production method | |
| US6503443B1 (en) | Metallic powder molding material and its re-compression molded body and sintered body obtained from the re-compression molded body and production methods thereof | |
| JP4570066B2 (en) | Method for manufacturing sintered sprocket for silent chain | |
| US20090129964A1 (en) | Method of forming powder metal components having surface densification | |
| US6143240A (en) | High density forming process with powder blends | |
| JP3869620B2 (en) | Alloy steel powder molding material, alloy steel powder processed body, and manufacturing method of alloy steel powder molding material | |
| KR20050012161A (en) | Sintering sprocket for silent chain and method thereof | |
| JPH02129304A (en) | Sintered synchronizer ring and manufacture thereof | |
| JP3246574B2 (en) | Manufacturing method of sintered composite machine parts | |
| EP0334968B1 (en) | Composite alloy steel powder and sintered alloy steel | |
| JPS6184302A (en) | Manufacture of sintered forged parts | |
| CN114054757A (en) | Powder metallurgy densification part and manufacturing process thereof | |
| JPH10219307A (en) | Sintered gear | |
| JP2020139193A (en) | Machine component, and method for producing the same | |
| CN104712677A (en) | Synchronizer hub for vehicles and method for manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071213 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081213 Year of fee payment: 13 |
|
| EXPY | Cancellation because of completion of term |