JPH03204412A - Manufacture of two-piece bearing - Google Patents
Manufacture of two-piece bearingInfo
- Publication number
- JPH03204412A JPH03204412A JP34047989A JP34047989A JPH03204412A JP H03204412 A JPH03204412 A JP H03204412A JP 34047989 A JP34047989 A JP 34047989A JP 34047989 A JP34047989 A JP 34047989A JP H03204412 A JPH03204412 A JP H03204412A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- ring
- intermediate structure
- cutter
- intermediate body
- 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 11
- 238000000034 method Methods 0.000 claims abstract description 35
- 238000000227 grinding Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000005496 tempering Methods 0.000 claims abstract description 7
- 238000005242 forging Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 238000010791 quenching Methods 0.000 abstract description 2
- 230000000171 quenching effect Effects 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000760 Hardened steel Inorganic materials 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Landscapes
- Forging (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は2分割型軸受の製造方法に関するものであり、
詳細には、内燃機関や外燃機関のクランク軸や圧延機の
コネクティングロッド等の軸受装置として使用されてい
る2分割型軌道輪の製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a two-part bearing,
Specifically, the present invention relates to a method for manufacturing a two-part raceway ring used as a bearing device for a crankshaft of an internal combustion engine or an external combustion engine, a connecting rod of a rolling mill, or the like.
2分割型軸受の製造方法として自然側法が知られている
。この方法は、第2図に示すように焼入鋼の亀裂敏感性
を利用して、軌道輪(1a)(1b)を製造するもので
あって、リング状軸受中間構体(1)の外周面にカッタ
(2)で溝(3)(3)を形成し、この溝(3)(3)
内にli’(4)を打込むことによってリング状軸受中
間構体(1)に亀裂(5)を発生させ、2個1組の半円
状の軌道輪(la) (lb)を製造するものである
。A natural side method is known as a method for manufacturing two-piece bearings. As shown in Fig. 2, this method utilizes the crack sensitivity of hardened steel to manufacture bearing rings (1a) and (1b), and the outer circumferential surface of the ring-shaped bearing intermediate structure (1) Form grooves (3) (3) with a cutter (2) in the grooves (3) (3).
A crack (5) is generated in the ring-shaped bearing intermediate structure (1) by driving li' (4) into the ring-shaped bearing intermediate structure (1), and a set of two semicircular bearing rings (la) (lb) is manufactured. It is.
自然側法は、分割手段として焼入鋼の亀裂敏感性を利用
している関係上、2分割型軸受の材質と形状によっては
使用できない場合がある。Since the natural side method uses the crack sensitivity of hardened steel as a dividing means, it may not be usable depending on the material and shape of the two-piece bearing.
例えば、軌道輪(la) (lb)が浸炭鋼から製造
されている場合には、亀裂敏感値が低いため、自然側法
の採用は困難であり、また、軌道輪(Ia) (lb
)の肉厚が大きい場合には、軌道輪(la) (lb
)の内部迄焼きが入っていないため亀裂敏感値が低くな
り、自然側法の使用が困難となる。更に、軌道輪(la
)または(1b)において、それぞれの肉厚差が大きい
場合、例えば第3図に示すような玉軸受(6)において
、内輪(7)の肉厚T□、T2が端部と中心部とで大幅
に相違しているような場合には、軸方向への亀裂の伸展
が望めないため、自然側法の使用は困難となる。For example, when the bearing ring (la) (lb) is manufactured from carburized steel, it is difficult to adopt the natural side method because the crack sensitivity value is low;
) is thick, the raceway ring (la) (lb
) is not hardened to the inside, so the crack sensitivity value is low, making it difficult to use the natural side method. Furthermore, the bearing ring (la
) or (1b), if the difference in wall thickness is large, for example, in a ball bearing (6) as shown in Fig. 3, the inner ring (7) has wall thicknesses T If there is a large difference, it is difficult to use the natural side method because the crack cannot be expected to extend in the axial direction.
[発明が解決しようとする課題]
2分割型軸受を自然側法によって製造する場合の材質お
よび形状による上記制約を取り除(ため、第4図に示す
ような半割り状態への旋削工程と熱処理工程とを組合せ
た軸受製造方法が使用されている。[Problem to be solved by the invention] The above-mentioned restrictions due to material and shape when manufacturing a two-split bearing by the natural side method are removed (therefore, the turning process and heat treatment to create a half-split state as shown in Fig. 4) are removed. A bearing manufacturing method that combines processes is used.
ところが、この方法ではリング状の軸受中間構体を半割
り状態に旋削した後、2分割されたそれぞれの軌道輪(
la) (lb)に熱処理を施しているため、第5図
に斜線付の矢印および二点鎖線で示すように熱処理時に
軌道輪(la) (lb)に大きな熱変形が生じる。However, with this method, after turning the ring-shaped bearing intermediate structure into half halves, each of the two divided bearing rings (
Since the heat treatment is applied to the bearing rings (la) (lb), large thermal deformation occurs in the bearing rings (la) (lb) during the heat treatment, as shown by the diagonal arrows and the two-dot chain line in FIG.
この結果、リング状形態のまま軸受中間構体に熱処理を
施した場合に比較して仕上げ研削用の取代が大きくなる
。As a result, the machining allowance for finish grinding becomes larger compared to the case where the bearing intermediate structure is heat-treated in its ring-shaped form.
特に、浸炭鋼から軌道輪(la) (1,b)が形成
されている場合には、上記の熱変形が顕著なため、必要
な硬化層(8)の深さを確保することが困難となる。In particular, when the bearing rings (la) (1, b) are made of carburized steel, the thermal deformation described above is significant, making it difficult to secure the required depth of the hardened layer (8). Become.
上記課題の解決手段として本発明は、鍛造によって形成
されたリング状の軸受中間構体に熱処理を施す工程と、
前記リング状軸受中間構体のテンパー処理時に、長径り
十T、短径りなる楕円状の軸受中間構体(ここにTはカ
ッタの刃幅)に変形させる楕円修正工程と、
前記軸受中間構体をTなる刃幅寸法を具えたカッタによ
って短径に沿って切断し 半円状の横断面形状を具えた
2個1組の軌道輪に形成する工程と、
前記2個1組に切断された軌道輪の研削加工工程とから
なる2分割型軸受の製造方法を提供するものである。As a means for solving the above-mentioned problems, the present invention includes a step of heat-treating a ring-shaped bearing intermediate structure formed by forging, and a tempering process of the ring-shaped bearing intermediate structure, in which the ring-shaped bearing intermediate structure is formed into an elliptical shape with a major axis of T and a minor axis. an ellipse correction process in which the bearing intermediate structure is transformed into a bearing intermediate structure (here, T is the blade width of the cutter), and the bearing intermediate structure is cut along the short axis with a cutter having a blade width dimension of T to form a semicircular cross section. The present invention provides a method for manufacturing a two-piece bearing, which comprises a step of forming a set of two raceway rings with a shape, and a step of grinding the raceway rings cut into sets of two.
:作用]
カッタを利用して半円状の横断面形状を具えた2個1組
の軌道輪に切断する以前に、リング状の軸受中間構体を
テンパー処理時に楕円修正治具を用い、長径方向に引り
出すことによって長径方向にカッタの刃幅分だけ楕円状
に変形させる。この後、楕円状に変形した軸受中間構体
を、前記の刃幅を持ったカッタで短径に沿って切断する
ことによって、切断端を突合せたとき横断面の形状が真
円となる2個1組の半円状の軌道輪を製造する。: Effect] Before cutting the ring-shaped bearing intermediate structure into a set of two bearing rings each having a semicircular cross-sectional shape using a cutter, an ellipse correction jig is used during tempering of the ring-shaped bearing intermediate structure. By pulling it out, it is deformed into an elliptical shape by the length of the cutter's blade width in the major diameter direction. After this, the bearing intermediate structure deformed into an elliptical shape is cut along the short axis with a cutter having the blade width described above, so that when the cut ends are brought together, the cross-sectional shape becomes a perfect circle. A set of semicircular bearing rings is manufactured.
(実施例〕
第1図Aは本発明方法を説明する工程図、第1図Bはそ
の切断工程を示す軸受中間構体および軌道輪中間構体の
正面図である。(Example) FIG. 1A is a process diagram for explaining the method of the present invention, and FIG. 1B is a front view of a bearing intermediate structure and a bearing ring intermediate structure showing the cutting process.
尚、以下の記述において、従来技術を示す第2図乃至第
5図と同一の構成部材は同一の参照番号で表示し、重複
する事項に関しては説明を省略する。In the following description, the same constituent members as those in FIGS. 2 to 5 showing the prior art are indicated by the same reference numerals, and explanations of overlapping matters will be omitted.
以下、圧延機のコネクティングロッド(図示省略)の軸
受装置に使用される2分割型軌道輪(la) (lb
)を浸炭鋼材から製造する具体例に基づいて本発明を説
明する。Hereinafter, two-split bearing rings (la) (lb) used in bearing devices for rolling mill connecting rods (not shown)
) from carburized steel.
上記コネクティングロッドの直径寸法770+msに合
わせて、浸炭加工可能な綱材から鍛造によって平均内径
約770閣、平均外径的1070mm、幅約300mの
リング状軸受中間構体(1)を製造する。更に正確に説
明すると、この軸受中間構体(1)の最大内径は、後記
カッタ(2)により切断に備えて、第1図Bに示すよう
にコネクティングロッドの直径770閣よりもカッタ(
2)の刃幅寸法T(例えば3閣)たけ大径に設定す”る
。上記リング状軸受中間構体(1)に表面硬化用の熱処
理(浸炭加工)を施した後、この軸受中間構体(1)を
リング形状のまま所定温度に加熱して二次焼入を行う。A ring-shaped bearing intermediate structure (1) having an average inner diameter of about 770 mm, an average outer diameter of 1070 mm, and a width of about 300 m is manufactured by forging from a carburized steel material in accordance with the diameter of the connecting rod of 770+ms. To explain more precisely, the maximum inner diameter of this bearing intermediate structure (1) is larger than the diameter of the connecting rod (770 mm) in preparation for cutting by the cutter (2) described later.
2) The blade width dimension T (for example, 3 mm) is set to a larger diameter. After the ring-shaped bearing intermediate structure (1) is subjected to surface hardening heat treatment (carburizing process), this bearing intermediate structure ( 1) is heated in the ring shape to a predetermined temperature to perform secondary quenching.
次いで、テンパー処理時にリング状軸受中間構体(1)
にカッタ(2)の切り込み位置から90°の位置で内側
より修正治具にてこのリング状軸受中間構体(1)を楕
円状に変形させる(第1図C,D)。この後、リング状
軸受中間構体(1)を幅11のカンタ(2)で短径方向
で切断することによって、半円状の横断面形状を具えた
2個1組の軌道輪中間構体(la’) (lb’)を
形成する。最後に、カッタ(2)による切断面同士を突
き合わせた状態にして軌道輪中間構体(la’) (
lb’)の表面に仕上げ研削加工を施す。これによって
、真円形の横断面形状を具えた2分割型の軌道輪(la
) (lb)が最終製品として製造される。Next, during the tempering process, the ring-shaped bearing intermediate structure (1)
Next, the ring-shaped bearing intermediate structure (1) is deformed into an elliptical shape using a correction jig from the inside at a position 90° from the cut position of the cutter (2) (FIGS. 1C and D). Thereafter, by cutting the ring-shaped bearing intermediate structure (1) in the short diameter direction with a canter (2) having a width of 11, a set of two bearing ring intermediate structures (la ') (lb') is formed. Finally, the raceway ring intermediate structure (la') (
Finish grinding is applied to the surface of lb'). This creates a two-part raceway ring (la) with a perfectly circular cross-sectional shape.
) (lb) is produced as the final product.
尚、上記実施例では、テンパー処理時にリング状軸受中
間構体(1)に修正治具を使用して、楕円状に変形させ
ているが、製法として二次焼入直後の製品温度が高い間
に修正治具にて変形させる方法も採用することができる
。In the above example, a correction jig is used for the ring-shaped bearing intermediate structure (1) during tempering to deform it into an elliptical shape. A method of deforming using a correction jig can also be adopted.
〔発明の効果]
リング状のまま軸受中間構体が熱処理されるため、熱処
理工程での変形が少なく、この分だけ仕上げ研削用の取
代を小さくすることができる。従って、加工工数の削減
が可能となる。特に、浸炭鋼から軌道輪を製作する場合
に、熱変形に伴う取代として大きな浸炭深さを見込む必
要がないため、熱処理工数の節減効果が大きくなる。[Effects of the Invention] Since the bearing intermediate structure is heat-treated while still in the ring shape, deformation during the heat treatment process is small, and the machining allowance for finish grinding can be reduced accordingly. Therefore, it is possible to reduce the number of processing steps. In particular, when manufacturing raceway rings from carburized steel, it is not necessary to allow for a large carburizing depth as a machining allowance due to thermal deformation, which greatly reduces the number of heat treatment steps.
第1図Aは本発明方法を説明する工程図、第1図Bはそ
の切断工程を示す軸受中間構体および駆動輪中間構体の
正面図、第1図Cは楕円修正工程を説明する工程図、第
1図りは楕円修正工程を示す正面図、第2図は自然側法
の説明図、第3図は玉軸受の内輪の縦断面図、第4図は
従来方法の工程図、第5図は従来方法を使用した場合の
軌道輪の熱変形形態を説明する平面図である。
(1) −リング状軸受中間構体、
(la) (1bL−一・軌道輪、
(la’) (lb“)−軌道輪中間構体、(2)・
−カッタ、 (T)−・カッタの刃幅。
第1図(AI
溶5゛図
1医C1り
第2図
/
(FIG. 1A is a process diagram explaining the method of the present invention, FIG. 1B is a front view of a bearing intermediate structure and a drive wheel intermediate structure showing the cutting process, FIG. 1C is a process diagram explaining the ellipse correction process, The first diagram is a front view showing the ellipse correction process, the second diagram is an explanatory diagram of the natural side method, the third diagram is a vertical cross-sectional view of the inner ring of a ball bearing, the fourth diagram is a process diagram of the conventional method, and the fifth diagram is It is a top view explaining the thermal deformation form of the bearing ring when using the conventional method. (1) - Ring-shaped bearing intermediate structure, (la) (1bL-One-ring, (la') (lb")-Rearing ring intermediate structure, (2)
- Cutter, (T) - Cutter blade width. Figure 1 (AI Melting 5゛Figure 1 Doctor C1 Figure 2/
Claims (1)
に熱処理を施す工程と、 前記リング状軸受中間構体のテンパー処理時に、長径D
+T、短径Dなる楕円状の軸受中間構体(ここにTはカ
ッタの刃幅)に変形させる楕円修正工程と、 前記軸受中間構体をTなる刃幅寸法を具えたカッタによ
って短径に沿って切断し、半円状の横断面形状を具えた
2個1組の軌道輪に形成する工程と、 前記2個1組に切断された軌道輪の研削加工工程とから
なる2分割型軸受の製造方法。(1) A process of heat-treating the ring-shaped bearing intermediate structure formed by forging, and during tempering of the ring-shaped bearing intermediate structure, the major diameter D
an ellipse correction step in which the bearing intermediate structure is transformed into an elliptical bearing intermediate structure with a width of +T and a minor axis D (here, T is the blade width of the cutter); Manufacture of a two-piece type bearing, which includes a step of cutting and forming a set of two bearing rings with a semicircular cross-sectional shape, and a grinding process of the cut rings into two sets. Method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34047989A JP2738758B2 (en) | 1989-12-29 | 1989-12-29 | Manufacturing method of two-part bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34047989A JP2738758B2 (en) | 1989-12-29 | 1989-12-29 | Manufacturing method of two-part bearing |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03204412A true JPH03204412A (en) | 1991-09-06 |
JP2738758B2 JP2738758B2 (en) | 1998-04-08 |
Family
ID=18337357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP34047989A Expired - Fee Related JP2738758B2 (en) | 1989-12-29 | 1989-12-29 | Manufacturing method of two-part bearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2738758B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008221458A (en) * | 2008-03-06 | 2008-09-25 | Ntn Corp | Machine cutting manufacturing method for half-cut ring member |
JP2014202301A (en) * | 2013-04-05 | 2014-10-27 | 日本精工株式会社 | Outer ring split type rolling bearing and method of manufacturing the same |
JP2016125652A (en) * | 2015-01-08 | 2016-07-11 | 日本精工株式会社 | Manufacturing method for split type raceway ring |
JP2016125651A (en) * | 2015-01-08 | 2016-07-11 | 日本精工株式会社 | Manufacturing method for split type raceway ring |
-
1989
- 1989-12-29 JP JP34047989A patent/JP2738758B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008221458A (en) * | 2008-03-06 | 2008-09-25 | Ntn Corp | Machine cutting manufacturing method for half-cut ring member |
JP2014202301A (en) * | 2013-04-05 | 2014-10-27 | 日本精工株式会社 | Outer ring split type rolling bearing and method of manufacturing the same |
JP2016125652A (en) * | 2015-01-08 | 2016-07-11 | 日本精工株式会社 | Manufacturing method for split type raceway ring |
JP2016125651A (en) * | 2015-01-08 | 2016-07-11 | 日本精工株式会社 | Manufacturing method for split type raceway ring |
Also Published As
Publication number | Publication date |
---|---|
JP2738758B2 (en) | 1998-04-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |