JPH07115099B2 - Hardened ball cutting method - Google Patents
Hardened ball cutting methodInfo
- Publication number
- JPH07115099B2 JPH07115099B2 JP31888987A JP31888987A JPH07115099B2 JP H07115099 B2 JPH07115099 B2 JP H07115099B2 JP 31888987 A JP31888987 A JP 31888987A JP 31888987 A JP31888987 A JP 31888987A JP H07115099 B2 JPH07115099 B2 JP H07115099B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- hardened
- cutting
- quenching
- hole
- 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 - Fee Related
Links
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/10—Connection to driving members
- F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
- F16J1/22—Connection to driving members with connecting-rods, i.e. pivotal connections with universal joint, e.g. ball-joint
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/40—Heat treatment
- F05B2230/41—Hardening; Annealing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
- F05C2201/0457—Cemented steel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/12—Coating
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、焼き入れボールの切削方法に係り、特に球状
の一部を切削して凹，凸部あるいは溝を形成するに好適
な焼き入れボールの切削方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for cutting a quenching ball, and in particular, quenching suitable for cutting a spherical part to form a recess, a protrusion or a groove. Regarding the cutting method of balls.
従来、球体の一部に穴もしくは溝を形成する、もしくは
球体の一部の、例えば半球部分の周囲を切削除去して異
形部を形成する方法の関連技術として、特開昭61−1529
72号あるいは特開昭62−167917号公報等が知られてい
る。Conventionally, as a related technique of forming a hole or groove in a part of a sphere, or cutting and removing a part of the sphere, for example, the periphery of a hemisphere, to form a deformed portion, JP-A-61-1528
No. 72 or JP-A-62-167917 are known.
そして、例えば、穴付ボールの製造方法は一般に知られ
ているように、素材を圧造した後、フラッシングにより
球状に成形し、その後、穴切削を行い、更には熱処理
（焼入），球面研磨，穴研磨を加えボールを完成させて
いた。しかし、この方法では、焼入前の球体に穴切削を
行うためのチャッキングが必要になる。従ってチャッキ
ングで球体の変形が生じる分だけ研磨代を大きくとる必
要があり、作業工数を多く要すると云う問題点を有して
いた。Then, for example, as is generally known in the method of manufacturing a ball with holes, after the material is pressed, it is formed into a spherical shape by flashing, then hole cutting is performed, and further heat treatment (quenching), spherical polishing, Holes were added to complete the ball. However, this method requires chucking for performing hole cutting on the sphere before quenching. Therefore, there is a problem in that the polishing allowance must be increased as much as the deformation of the sphere due to chucking, which requires a large number of working steps.
また、焼入後の球精度を得るため鋼球研削盤で研磨加工
するが、穴と球面との同軸精度が得にくく、さらに、球
面積が小さい場合や凸状部付ボールの場合にはその研削
が困難であった。しかも、同軸精度を確保するためには
球面研磨後、穴も研磨仕上げをしなければならず、生産
性が低く、製造工数を多く要していた。Also, in order to obtain the ball accuracy after quenching, it is polished with a steel ball grinder, but it is difficult to obtain the coaxial accuracy of the hole and the spherical surface, and in the case of a small ball area or a ball with a convex portion, Grinding was difficult. Moreover, in order to secure the coaxial accuracy, the holes must be polished and finished after the spherical surface polishing, resulting in low productivity and a large number of manufacturing steps.
尚、鋼球として、焼入，研磨まで仕上げた後で、穴等の
加工を行うことも考えられるが、硬度が高く、放電加
工，研磨によって穴仕上げを行わなければならないので
上記問題点は解決されない。Although it is possible to process holes and the like after finishing quenching and polishing as steel balls, the above problems are solved because the hardness is high and the holes must be finished by electrical discharge machining and polishing. Not done.
上記従来技術において、球面研削は穴加工を施し異形と
なった状態で行っており、球面と穴，溝，凸状部等との
同軸精度の確保が得にくく、また、作業工数を多く要す
ると云う問題点を有していた。In the above-mentioned conventional technique, the spherical surface grinding is performed in a deformed state by making a hole, and it is difficult to secure the coaxial precision between the spherical surface and the hole, groove, convex portion, or the like, and it requires a lot of man-hours. There was a problem called.
本発明の目的は、球面と穴，溝，凸状部等とを容易に高
精度に加工ができると共に作業工数を低減することがで
きる焼き入れボールの切削方法を提供することにある。An object of the present invention is to provide a quenching ball cutting method capable of easily and highly accurately processing a spherical surface, a hole, a groove, a convex portion and the like and reducing the number of working steps.
ボールの周囲を切削して凹，凸部あるいは溝を形成して
なる焼き入れボールの切削方法において、素材を圧造し
て球状に形成した後、焼き入れ処理を加えて精密に仕上
げ、その後、窒化処理して内部を軟化させ、更にその後
に上記凹，凸部あるいは溝を切削加工することにより達
成される。In a method of cutting a hardened ball in which the periphery of a ball is cut to form a recess, a protrusion, or a groove, a material is pressed into a spherical shape, and then a quenching process is added to precisely finish the nitrided ball. This can be achieved by processing to soften the inside and then cutting the recesses, protrusions or grooves.
素材から球面化された部材は、焼入れされ精密研削され
た後窒化処理が行われ、その後球面に穴加工を行う。球
面は焼入処理された後は硬度が高くなるが窒化処理を行
うことにより、表面硬度は高く耐摩特性を有しているも
のの、内部は切削しやすい状態に効果的に軟化してい
る。従って、球面加工のためチャッキングをしても球面
に変形を生じることなく、穴，溝及び凸状部等の加工も
特別の手法を用いることなく容易に行われる。The spherical member made of the material is quenched, precision ground, and then nitrided, and then the spherical surface is drilled. Although the hardness of the spherical surface becomes high after being hardened, the surface of the spherical surface has a high surface hardness and has abrasion resistance due to the nitriding treatment, but the inner surface is effectively softened so as to be easily cut. Therefore, even if chucking is performed for spherical surface processing, the spherical surface is not deformed, and holes, grooves, convex portions, etc. can be easily processed without using a special method.
以下本発明の実施例を第１図，第２図により説明する。
第１図は製造工程流れ図、第２図は第１図の塩浴窒化処
理後の鋼球内部の硬度分布説明図である。図において、
１は球状体、２は穴付焼き入れボール４に加工形成され
た端面、３は穴である。高炭素クロム軸受鋼等からなる
素材から圧造、フラッシングを経て得た鋼球を焼入処理
後に研削，ラップにより精密に仕上げ、その後、塩浴窒
化処理を行う。鋼球は塩浴窒化処理を行うことにより50
0℃以上の温度に保持されることで内部硬度が低下し、
施盤等により端面2,穴３等の切削加工が容易にできる。
また、球状体１の球表面には窒化層が形成されているの
で、加工の際のチャッキングも球状体１を変形させるこ
となく高精度に同軸に保持できる。An embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a flow chart of the manufacturing process, and FIG. 2 is an illustration of hardness distribution inside the steel ball after the salt bath nitriding treatment of FIG. In the figure,
Reference numeral 1 is a spherical body, 2 is an end surface formed by processing the quenching ball 4 with holes, and 3 is a hole. Steel balls obtained by forging and flushing from a material made of high carbon chrome bearing steel etc. are hardened, then precisely ground by grinding and lapping, and then subjected to salt bath nitriding. Steel balls are 50
By being kept at a temperature of 0 ° C or higher, the internal hardness decreases,
Cutting of the end face 2, hole 3, etc. can be done easily with a lathe.
Further, since the nitride layer is formed on the spherical surface of the spherical body 1, the chucking at the time of processing can be coaxially held with high precision without deforming the spherical body 1.
第２図は横軸に球表面からの距離をとり縦軸に硬度をと
って塩浴窒化処理後の硬度分布を示し、高炭素クロム軸
受鋼からなる焼き入れボールを、加熱温度570℃，加熱
時間120分，油冷却の条件で塩浴窒化処理した外径20mm
の鋼球内部の硬度である。硬度は曲線Ａに示すように、
球表面はHV1000であるが、球表面から0.2mm以上の球内
部側はHV400以下に軟化している。Fig. 2 shows the hardness distribution after salt bath nitriding treatment, where the horizontal axis is the distance from the sphere surface and the vertical axis is the hardness. Hardened balls made of high carbon chromium bearing steel are heated at a heating temperature of 570 ° C. Outer diameter 20mm after salt bath nitriding under oil cooling conditions for 120 minutes
The hardness of the steel ball inside. The hardness is, as shown by curve A,
The surface of the sphere is HV1000, but the inside of the sphere 0.2 mm or more from the surface of the sphere is softened to HV400 or less.
第３図は本実施例の方法によって製造された焼き入れボ
ールを圧縮機用ピストンに結合した場合の断面説明図で
ある。図において、５はピストンロッド、６はロッド端
部、７はＷ溝、８は取付穴で焼き入れボール４に形成さ
れている。焼き入れボール４の鋼球の表面には内周にＷ
溝７を有する取付穴８が、第１図の製造工程流れ図の順
によって形成されている。そして、例えば、アルミニウ
ム合金等の軽合金からなるピストンロッド５が、施盤等
により内周にＷ溝７が形成された取付穴８とほぼ同径に
形成されたロッド端部６を取付穴８に嵌入し、ピストン
ロッド５を加圧しピストンロッド５が取付穴８に塑性流
動結合されている。この場合、取付穴８は窒化処理前に
加工仕上げられた鋼球表面を基準に切削されているた
め、塑性流動結合後のピストンロッド５と焼き入れボー
ル４の表面との同軸精度は高く、さらに、焼き入れボー
ル４の表面は球継手として耐摩耗性が要求されるが、窒
化層が形成されているのでその機能も充分に備えられて
いる。尚、焼き入れボール４において、取付穴、もしく
は溝，凸状部等において耐摩耗性を必要とする場合はそ
の加工後、さらに窒化処理を行うことも可能である。FIG. 3 is a cross-sectional explanatory view of the case where the quenched ball manufactured by the method of the present embodiment is connected to the compressor piston. In the figure, 5 is a piston rod, 6 is a rod end, 7 is a W groove, and 8 is a mounting hole, which is formed in the quenching ball 4. W on the inner circumference on the surface of the steel ball of the quenching ball 4
A mounting hole 8 having a groove 7 is formed in the order of the manufacturing process flow chart of FIG. Then, for example, a piston rod 5 made of a light alloy such as an aluminum alloy has a rod end 6 formed in a mounting hole 8 with a diameter substantially equal to that of a mounting hole 8 in which a W groove 7 is formed on the inner periphery by lapping or the like. The piston rod 5 is fitted and pressed, and the piston rod 5 is plastically fluidly coupled to the mounting hole 8. In this case, since the mounting hole 8 is cut based on the surface of the steel ball that has been machined and finished before the nitriding treatment, the coaxial accuracy between the piston rod 5 and the surface of the quenching ball 4 after the plastic flow coupling is high, and The surface of the hardened ball 4 is required to have wear resistance as a ball joint, but since a nitride layer is formed, its function is sufficiently provided. In addition, in the case of the hardened ball 4, if abrasion resistance is required in the mounting hole, groove, convex portion or the like, it is possible to further perform nitriding treatment after the machining.
このように本実施例の焼き入れボールの切削方法におい
ては、鋼球を焼入処理し精密研削を行った後に塩浴窒化
処理を行い、表皮内部の硬度を低下させて穴加工を行う
ので、鋼球表面は硬度が高く穴加工のチャッキングの際
の球面の変形を生じることない。また、鋼球表面に対し
穴の同軸精度が出しやすく、従来に比べ製作時の作業工
数を著しく低減できる。As described above, in the method for cutting a hardened ball according to the present embodiment, a salt bath nitriding treatment is performed after quenching and precision grinding of a steel ball, and the hardness of the inside of the skin is reduced to perform hole processing. The surface of the steel ball has a high hardness and does not cause the deformation of the spherical surface during chucking for drilling. Further, the coaxial accuracy of the hole can be easily obtained with respect to the surface of the steel ball, and the number of man-hours for manufacturing can be remarkably reduced as compared with the conventional case.
上記実施例は、鋼球の表面に穴を設けた異形ボールの場
合について述べたが、穴以外の溝，凸状部等を形成した
異形ボールの場合も作用効果は全く同様である。In the above-mentioned embodiment, the case of a deformed ball having holes formed on the surface of a steel ball has been described, but the same effects are obtained in the case of a deformed ball having grooves, convex portions, etc. other than the holes.
以上記述した如く本発明の焼き入れボールの切削方法に
よれば、球面と穴，溝，凸状部等とを同軸に容易に高精
度に加工ができると共に作業工数を著しく低減できる効
果を有するものである。As described above, according to the method for cutting a hardened ball of the present invention, the spherical surface and the hole, groove, convex portion or the like can be easily and accurately machined coaxially, and the number of working steps can be remarkably reduced. Is.
第１図は本発明の異形ボールの製造方法を実施時の製造
工程流れ図、第２図は第１図の塩浴窒化処理後の鋼球内
部の硬度分布説明図、第３図は第１図の流れ図により製
造された鋼球とピストンロッドとの結合説明図である。 ３…穴、４…焼き入れボール。FIG. 1 is a flow chart of a manufacturing process when the method for manufacturing a deformed ball of the present invention is carried out, FIG. 2 is an explanatory view of hardness distribution inside a steel ball after salt bath nitriding treatment of FIG. 1, and FIG. 3 is FIG. FIG. 7 is an explanatory view of the connection between the steel ball and the piston rod manufactured according to the flowchart of FIG. 3 ... Hole, 4 ... Hardened ball.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ０４Ｂ 39/00 １０７ Ｈ Ｆ１６Ｊ 1/22 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location F04B 39/00 107 H F16J 1/22
Claims (1)
溝を形成してなる焼き入れボールの切削方法において、
素材を圧造して球状に形成した後、焼き入れ処理を加え
て精密に仕上げ、その後、窒化処理して内部を軟化さ
せ、更にその後に上記凹，凸部あるいは溝を切削加工す
ることを特徴とする焼き入れボールの切削方法。1. A method for cutting a hardened ball, which comprises cutting a periphery of a ball to form a concave portion, a convex portion or a groove,
After the material is pressed into a spherical shape, a quenching process is applied to finish it precisely, then a nitriding process is performed to soften the inside, and then the recesses, protrusions or grooves are cut. How to cut hardened balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31888987A JPH07115099B2 (en) | 1987-12-18 | 1987-12-18 | Hardened ball cutting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31888987A JPH07115099B2 (en) | 1987-12-18 | 1987-12-18 | Hardened ball cutting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01162530A JPH01162530A (en) | 1989-06-27 |
| JPH07115099B2 true JPH07115099B2 (en) | 1995-12-13 |
Family
ID=18104096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31888987A Expired - Fee Related JPH07115099B2 (en) | 1987-12-18 | 1987-12-18 | Hardened ball cutting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115099B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729071A (en) * | 2016-04-27 | 2016-07-06 | 安顺市虹翼特种钢球制造有限公司 | High-precision austenitic stainless steel ball machining method |
| CN107586923A (en) * | 2017-10-23 | 2018-01-16 | 宁国市正兴耐磨材料有限公司 | A kind of making low-carbon low-chromium alloy wear-resistant ball quenching technical |
| CN111822952A (en) * | 2020-07-06 | 2020-10-27 | 姚琪 | Method for processing aluminum-based silicon carbide launching tube |
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| JP3936447B2 (en) * | 1997-10-30 | 2007-06-27 | Ｎｔｎ株式会社 | Manufacturing method of swash plate type compressor shoe |
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| CN100464940C (en) * | 2007-05-15 | 2009-03-04 | 山东东阿钢球集团有限公司 | Method for producing accurate steel balls |
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1987
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729071A (en) * | 2016-04-27 | 2016-07-06 | 安顺市虹翼特种钢球制造有限公司 | High-precision austenitic stainless steel ball machining method |
| CN107586923A (en) * | 2017-10-23 | 2018-01-16 | 宁国市正兴耐磨材料有限公司 | A kind of making low-carbon low-chromium alloy wear-resistant ball quenching technical |
| CN107586923B (en) * | 2017-10-23 | 2018-12-07 | 宁国市正兴耐磨材料有限公司 | A kind of making low-carbon low-chromium alloy wear-resistant ball quenching technical |
| CN111822952A (en) * | 2020-07-06 | 2020-10-27 | 姚琪 | Method for processing aluminum-based silicon carbide launching tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01162530A (en) | 1989-06-27 |
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