JP2024038789A - Workpiece cleaning device, workpiece cleaning method, and outer joint member for constant velocity universal joint - Google Patents

Workpiece cleaning device, workpiece cleaning method, and outer joint member for constant velocity universal joint Download PDF

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JP2024038789A
JP2024038789A JP2022143065A JP2022143065A JP2024038789A JP 2024038789 A JP2024038789 A JP 2024038789A JP 2022143065 A JP2022143065 A JP 2022143065A JP 2022143065 A JP2022143065 A JP 2022143065A JP 2024038789 A JP2024038789 A JP 2024038789A
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workpiece
cleaning
lubricating oil
joint member
outer joint
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慎太郎 鈴木
Shintaro Suzuki
智哉 村川
Tomoya MURAKAWA
大 齊藤
Masaru Saito
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NTN Corp
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NTN Toyo Bearing Co Ltd
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Abstract

To provide a workpiece cleaning device and a workpiece cleaning method that can remove bonded films and lubricants without using agent such as acids or strong alkalis in painting processes for metal parts coated with bonded films and lubricants, as well as an outer joint member that has undergone pre-painting cleaning to remove bonded films and lubricants.SOLUTION: A workpiece cleaning method includes a lubricant removal step for removing a lubricant from a workpiece with a detergent, and a laser cleaning step for irradiating the workpiece with a laser beam, to peel off the bonded film from the workpiece. Following the lubricant removal step, the laser cleaning step is performed.SELECTED DRAWING: Figure 1

Description

本発明は、ワーク洗浄装置、ワーク洗浄方法、および等速自在継手用外側継手部材に関する。 The present invention relates to a workpiece cleaning device, a workpiece cleaning method, and an outer joint member for a constant velocity universal joint.

金属製自動車製品としての等速自在継手は、外側継手部材と、内側継手部材と、外側継手部材のトラック溝と内側継手部材のトラック溝との間に介在してトルクを伝達する複数のボールと、ボールを保持するケージ等で構成される。この場合、図12に示すように、外側継手部材は、カップ部1とステム部2とからなる。そして、カップ部1の内径面(内球面)3にボールが転動)するトラック溝4が形成されている。また、ステム部2は、雄スプライン部5と、先端の雄ねじ部6とが形成されている。 A constant velocity universal joint as a metal automobile product consists of an outer joint member, an inner joint member, and a plurality of balls that are interposed between the track grooves of the outer joint member and the track grooves of the inner joint member to transmit torque. It consists of a cage that holds the ball, etc. In this case, as shown in FIG. 12, the outer joint member consists of a cup part 1 and a stem part 2. A track groove 4 on which the ball rolls is formed on the inner diameter surface (inner spherical surface) 3 of the cup portion 1. Further, the stem portion 2 is formed with a male spline portion 5 and a male threaded portion 6 at the tip.

外側継手部材は、一般には、図11に示すように、(亜)熱間鍛造工程11→冷間鍛造工程12→旋削・転造工程13→熱処理・塗装工程14→研削工程15等の工程が行われて製造される。 As shown in FIG. 11, the outer joint member generally undergoes the following steps: (sub-) hot forging process 11 → cold forging process 12 → turning/rolling process 13 → heat treatment/painting process 14 → grinding process 15, etc. done and manufactured.

従来には、金属製自動車部品を高周波焼入れし、その焼入れ後に自動車部品の表面に粉体塗料を塗布した上で、自動車部品の焼戻しと焼付けとを高周波誘導加熱により同時に行う方法および製造装置が開示されている(特許文献1)。また、金属製自動車部品としての外側継手部材を冷間鍛造により、製造する方法が開示されている(特許文献2)。 Conventionally, a method and a manufacturing apparatus have been disclosed in which metal automobile parts are induction hardened, a powder coating is applied to the surface of the automobile parts after the quenching, and the automobile parts are simultaneously tempered and baked using high-frequency induction heating. (Patent Document 1). Further, a method for manufacturing an outer joint member as a metal automobile part by cold forging is disclosed (Patent Document 2).

ところで、冷間鍛造工程12では、ボンデ処理を行う。ここで、ボンデ処理(リン酸塩被膜+石鹸処理)「ボンデライト・ボンダリューベ法」とは、材料にリン酸塩皮膜処理を行い、材料の表面に潤滑皮膜を生成させる処理である。冷間鍛造成形加工時の成形品と成形金型の摩擦抵抗を減らすために行う。 By the way, in the cold forging process 12, a bonding process is performed. Here, the bonderite-bondarube process (phosphate coating + soap treatment) is a process in which a material is subjected to a phosphate coating treatment to form a lubricating film on the surface of the material. This is done to reduce the frictional resistance between the molded product and the molding die during cold forging.

このボンデ処理で、図10に示すように、素材(例えば、中炭素鋼)M上にボンデ被膜Cが形成される。ボンデ被膜Cは、リン酸亜鉛皮膜C1と、リン酸亜鉛皮膜C1上に形成される反応性石鹸層(金属石鹸層)C2と、反応性石鹸層C2上に形成される未反応石鹸層C3との3層構造となる。 Through this bonding process, a bonding film C is formed on the material (for example, medium carbon steel) M, as shown in FIG. The bonde coating C includes a zinc phosphate coating C1, a reactive soap layer (metallic soap layer) C2 formed on the zinc phosphate coating C1, and an unreacted soap layer C3 formed on the reactive soap layer C2. It has a three-layer structure.

最下層のリン酸亜鉛皮膜C1は、素材Mとの密着性に優れ、素材Mに追随して、金型とワークとの焼付き(金属接触)を防止する。中間の金属石鹸層C2は摩擦係数を低減する働きがある。上層の未反応石鹸層C3は鍛造時に金型との離型性を向上させる。 The lowermost zinc phosphate film C1 has excellent adhesion to the material M, follows the material M, and prevents seizure (metallic contact) between the mold and the workpiece. The intermediate metal soap layer C2 functions to reduce the coefficient of friction. The upper unreacted soap layer C3 improves the releasability from the mold during forging.

ステム部2の雄スプライン部5の成形は、一般には、転造加工やプレス加工で行われる。その加工の際には潤滑油が使用される。このため、塗装工程で、冷間鍛造で行われたボンデ処理によるボンデ被膜や、スプライン成形時の潤滑油が被塗装品(外側継手部材)に残る。しかながら、このようなボンデ被膜や潤滑油が残れば、塗装剥がれを起こすおそれがある。そこで、従来では、脱脂洗浄が行われていた。 The male spline portion 5 of the stem portion 2 is generally formed by rolling or pressing. Lubricating oil is used during processing. Therefore, in the painting process, the bonding film from the bonding process performed in cold forging and the lubricating oil during spline forming remain on the product to be painted (outer joint member). However, if such a bond film or lubricant remains, there is a risk that the paint will peel off. Therefore, conventionally, degreasing and cleaning have been performed.

国際公開第2012/03925号International Publication No. 2012/03925 特開2002-346688号公報JP2002-346688A

ところで、脱脂洗浄を行う場合、潤滑油のみの付着では、例えば、弱アルカリ洗剤を用いて除去することができる。しかしながら、ボンデ被膜を除去する場合、酸や強アルカリ性の洗剤を用いることになる。 By the way, when degreasing and cleaning is performed, if only lubricating oil is attached, it can be removed using, for example, a weak alkaline detergent. However, when removing the Bonde film, an acid or strong alkaline detergent must be used.

酸を用いた場合、ボンデ被膜の除去力は高いが、素材表面が腐食されて面精度が悪化し、さらに水素脆性の危険を伴う。また、アルカリ洗浄の場合、ボンデ被膜の除去には強アルカリ性のものが用いられる。酸や強アルカリ性洗剤は環境に問題があり、保護具の装着、排気装置や設備の気密性を高める必要がある。さらに、洗浄で劣化(除去能力の低下)した洗浄剤を処分する際には、中和して無害化する必要があった。 When acid is used, the bonding film removal power is high, but the surface of the material is corroded, the surface precision deteriorates, and there is also the risk of hydrogen embrittlement. Further, in the case of alkaline cleaning, a strong alkaline agent is used to remove the bonded film. Acidic and strong alkaline detergents pose environmental problems, and it is necessary to wear protective equipment and improve the airtightness of exhaust systems and equipment. Furthermore, when disposing of cleaning agents that have deteriorated due to cleaning (decreased removal ability), it has been necessary to neutralize them to render them harmless.

このため、従来において、潤滑油とボンデ被膜とが付着した金属部品に対してこれらの潤滑油とボンデ被膜とを除去する工程を行う場合、生産性が劣るとともに、処理コストが高くなる課題を有していた。 For this reason, conventionally, when performing a process to remove lubricating oil and bonding film from metal parts to which lubricating oil and bonding film have adhered, there have been problems with low productivity and high processing costs. Was.

そこで、本発明は、上記課題に鑑みて、ボンデ被膜および潤滑油が付着した金属部品の塗装処理工程において、酸や強アルカリなどの薬剤を用いることなく、ボンデ被膜および潤滑油を除去することができるワーク洗浄装置、ワーク洗浄方法、及びボンデ被膜および潤滑油を除去する塗装前洗浄が行われた等速自在継手用外側継手部材を提供するものである。 Therefore, in view of the above-mentioned problems, the present invention has been developed to remove the bonding film and lubricating oil without using chemicals such as acids and strong alkalis in the painting process of metal parts to which the bonding film and lubricating oil have adhered. The present invention provides a workpiece cleaning device, a workpiece cleaning method, and an outer joint member for a constant velocity universal joint that has been cleaned before painting to remove a bond film and lubricating oil.

本発明のワーク洗浄装置は、ボンデ被膜及び潤滑油が付着した金属部品であるワークを洗浄するワーク洗浄装置であって、ワークの潤滑油を除去する潤滑油除去手段と、レーザ光をワークに照射することによって、ワークのボンデ被膜を剥離するレーザクリーニング手段とを備えものである The workpiece cleaning apparatus of the present invention is a workpiece cleaning apparatus for cleaning a workpiece, which is a metal part to which a bonding film and lubricating oil are attached, and includes a lubricating oil removing means for removing lubricating oil from the workpiece, and a laser beam irradiating the workpiece. The device is equipped with a laser cleaning means for peeling off the bonding film on the workpiece.

本発明のワーク洗浄装置によれば、潤滑油除去手段にてワークの潤滑油を除去することができ、レーザクリーニング手段にてワークのボンデ被膜を剥離することができる。レーザクリーニングは、高いエネルギー密度のレーザ照射により個体あるいは液体の表面から構成物質が爆発的に昇華、蒸散されるレーザアブレーションと呼ばれる現象を利用している。ところが、レーザクリーニングのみで、ボンデ被膜及び潤滑油を除去しようとした場合、レーザで照射された油の一部が旋削加工面のワーク表面に焼付き、塗料の密着を阻害する。このため、レーザクリーニングを行う前に、ワークの潤滑油の除去を行えば、油のワーク表面の焼付きを回避することができる。しかも、潤滑油除去手段にて、ボンデ被膜の除去を行う必要がないので、潤滑油除去手段で使用する洗浄剤に、酸や強アルカリ性の洗剤を用いることなく、弱アルカリ性洗浄剤を使用することができる。 According to the workpiece cleaning apparatus of the present invention, the lubricating oil removal means can remove the lubricating oil from the workpiece, and the laser cleaning means can peel off the bonding film on the workpiece. Laser cleaning utilizes a phenomenon called laser ablation, in which constituent substances are explosively sublimated and evaporated from the surface of a solid or liquid by laser irradiation with high energy density. However, if an attempt is made to remove the bonding film and lubricating oil only by laser cleaning, a portion of the oil irradiated with the laser will stick to the surface of the workpiece, which is a turned surface, and will inhibit the adhesion of the paint. Therefore, by removing the lubricating oil from the workpiece before performing laser cleaning, it is possible to avoid oil from seizing the workpiece surface. Furthermore, since it is not necessary to remove the bond film using the lubricating oil removing means, a weak alkaline detergent can be used instead of an acid or strong alkaline detergent for the lubricating oil removing means. Can be done.

潤滑油除去手段は、洗浄剤にワークを浸漬する浸漬構造で構成されても、洗浄剤にワークに噴射する噴射構造で構成されても、ブラシをワークに接触させて潤滑油を除去するブラシ接触構造で構成されてもよい。すなわち、潤滑油除去手段に従来から使用されている公知公用の構造(装置)を用いることができ、設備の低コスト化を図ることができる。 The lubricating oil removal means may be configured with an immersion structure in which the workpiece is immersed in a cleaning agent, or an injection structure in which the cleaning agent is injected onto the workpiece, or a brush contact method in which the lubricating oil is removed by bringing a brush into contact with the workpiece. It may consist of a structure. That is, it is possible to use a conventionally known and publicly used structure (device) for the lubricating oil removing means, and it is possible to reduce the cost of the equipment.

洗浄剤として、界面活性剤が含まれたアルカリ洗浄剤と水をイオン化したアルカリ水との少なくともいずれかの弱アルカリ性洗浄剤を用いることができる。 As the cleaning agent, at least one of a weak alkaline cleaning agent including a surfactant-containing alkaline cleaning agent and alkaline water obtained by ionizing water can be used.

本発明のワーク洗浄方法は、ボンデ被膜及び潤滑油が付着した金属部品であるワークを洗浄するワーク洗浄方法であって、洗浄剤でワークの潤滑油を除去する潤滑油除去工程と、レーザ光をワークに照射することによって、ワークのボンデ被膜を剥離するレーザクリーニング工程とを備え、潤滑油除去工程を行った後、レーザクリーニング工程を行うものである。 The workpiece cleaning method of the present invention is a workpiece cleaning method for cleaning a workpiece that is a metal part to which a bonding film and lubricating oil are attached, and includes a lubricating oil removal step of removing lubricating oil from the workpiece with a cleaning agent, and a laser beam. The method includes a laser cleaning step in which the bonding film on the workpiece is removed by irradiating the workpiece, and the laser cleaning step is performed after the lubricating oil removal step.

潤滑油除去工程にてワークの潤滑油を除去することができ、レーザクリーニング工程にてワークのボンデ被膜を剥離することができる。しかも、レーザクリーニングを行う前に、ワークの潤滑油が除去されているので、油のワーク表面の焼付きを回避することができる。しかも、潤滑油除去工程にて、ボンデ被膜の除去を行う必要がないので、潤滑油除去工程で使用する洗浄剤に、酸や強アルカリ性の洗剤を用いることなく、弱アルカリ性洗浄剤を使用することができる。 The lubricating oil on the workpiece can be removed in the lubricating oil removal process, and the bonding film on the workpiece can be peeled off in the laser cleaning process. Furthermore, since the lubricating oil on the workpiece is removed before laser cleaning, it is possible to avoid oil from seizing the workpiece surface. Furthermore, since there is no need to remove the bond film in the lubricating oil removal process, a weak alkaline cleaning agent can be used instead of an acid or strong alkaline detergent in the lubricating oil removal process. Can be done.

前記金属部品が塗装される部品であり、前記ワーク洗浄方法にて、金属部品からボンデ被膜及び潤滑油を除去した後、ボンデ被膜及び潤滑油が除去された金属部品に塗装を施すものであってもよい。このように構成された金属部品には、塗装の下地として密着性を阻害する付着物が排除されており、安定した塗装品質を得ることができ、高品質の金属部品を提供することができる。 The metal part is a part to be painted, and after the bonding film and lubricating oil are removed from the metal part in the work cleaning method, painting is applied to the metal part from which the bonding film and lubricating oil have been removed. Good too. Metal parts configured in this manner are free of deposits that inhibit adhesion as a base for coating, and stable coating quality can be obtained, making it possible to provide high-quality metal parts.

本発明に係る一の等速自在継手用外側継手部材は、内径面にトルク伝達部材の転動を案内する案内溝が複数設けられたカップ部と、該カップ部の底部から軸方向外向きに延びたステム部とを備え、該ステム部に、他部材をトルク伝達可能に連結するための連結要素が設けられた等速自在継手用外側継手部材であって、前記カップ部が、前記ワーク洗浄方法が施されてなるものである。 One outer joint member for a constant velocity universal joint according to the present invention includes a cup portion provided with a plurality of guide grooves on the inner diameter surface for guiding the rolling of a torque transmission member, and a cup portion that extends outward in the axial direction from the bottom of the cup portion. an outer joint member for a constant velocity universal joint, the outer joint member having an extended stem portion, the stem portion being provided with a connecting element for connecting another member in a torque transmitting manner; It is made by applying a method.

本発明に係る一の等速自在継手用外側継手部材によれば、カップ部に、塗装の下地として密着性を阻害する付着物が排除されており、安定した塗装品質を得ることができ、高品質のカップ部を提供することができる。 According to the first outer joint member for a constant velocity universal joint according to the present invention, deposits that inhibit adhesion as a coating base are eliminated from the cup portion, making it possible to obtain stable coating quality and high quality coating. We can provide quality cup parts.

また、本発明に係る他の等速自在継手用外側継手部材は、内径面にトルク伝達部材の転動を案内する案内溝が複数設けられたカップ部と、該カップ部の底部から軸方向外向きに延びたステム部とを備え、該ステム部に、他部材をトルク伝達可能に連結するための連結要素が設けられた等速自在継手用外側継手部材であって、前記ステム部が、前記ワーク洗浄方法が施されてなるものである。 Further, another outer joint member for a constant velocity universal joint according to the present invention includes a cup portion provided with a plurality of guide grooves on the inner diameter surface for guiding the rolling motion of the torque transmitting member, and An outer joint member for a constant velocity universal joint, the outer joint member for a constant velocity universal joint comprising a stem portion extending in the direction, and a connecting element for connecting another member in a torque-transmissible manner to the stem portion, the stem portion being A workpiece cleaning method is applied.

本発明では、ボンデ被膜および潤滑油が安定して除去されており、高品質の製品(金属部品、たとえば、等速自在継手用外側継手部材)を提供することができる。しかも、潤滑油を除去する際には、酸性の洗浄剤や強アルカリ性の洗浄剤を使用する必要がなく、洗浄剤として、取り扱い性に優れた弱アルカリ性の洗浄剤を使用することができ、生産性の向上およびコスト低減を図ることができる。 In the present invention, the bonding film and the lubricating oil are stably removed, and a high-quality product (metal component, for example, an outer joint member for a constant velocity universal joint) can be provided. Furthermore, when removing lubricating oil, there is no need to use acidic or strong alkaline cleaning agents; instead, weakly alkaline cleaning agents that are easy to handle can be used, and productivity increases. It is possible to improve performance and reduce costs.

本発明に係るワーク洗浄装置の簡略ブロック図である。FIG. 1 is a simplified block diagram of a workpiece cleaning device according to the present invention. 本発明に係るワーク洗浄方法の簡略工程図である。1 is a simplified process diagram of a workpiece cleaning method according to the present invention. 第1の潤滑油除去手段の簡略図である。FIG. 3 is a simplified diagram of the first lubricating oil removal means. 第2の潤滑油除去手段の簡略図である。FIG. 3 is a simplified diagram of a second lubricating oil removal means. 本発明の等速自在継手用外側継手部材の側面図である。It is a side view of the outer joint member for constant velocity universal joints of the present invention. 等速自在継手用外側継手部材にレーザクリーニングを施している状態の側面図である。It is a side view of the state where laser cleaning is performed on the outer joint member for constant velocity universal joints. 本発明の他の等速自在継手用外側継手部材の側面図である。It is a side view of the outer joint member for other constant velocity universal joints of this invention. 等速自在継手用外側継手部材の焼入工程から焼付け工程までの工程を示す簡略ブロック図である。FIG. 3 is a simplified block diagram showing the steps from a hardening process to a baking process of an outer joint member for a constant velocity universal joint. 等速自在継手用外側継手部材の焼入工程から焼付け工程までの他の工程を示す簡略ブロック図である。It is a simplified block diagram showing other steps from a quenching step to a baking step of the outer joint member for a constant velocity universal joint. ボンデ被膜の簡略拡大断面図である。FIG. 2 is a simplified enlarged cross-sectional view of a bonded film. 等速自在継手用外側継手部材の製造工程図である。It is a manufacturing process diagram of the outer joint member for constant velocity universal joints. 等速自在継手用外側継手部材の一部断面で示す側面図である。It is a side view shown in partial cross section of the outer joint member for constant velocity universal joints.

以下本発明の実施の形態を図1~図9に基づいて説明する。等速自在継手用外側継手部材を焼付け工程と同時に塗装の焼付けを行う場合は、図8に示す工程となる。図8に示す工程では、焼入れ工程S1→塗装前洗浄工程S2→塗装工程S3→焼戻し兼焼付け工程S4を行う。また、焼き戻し工程後に焼付け工程を行う場合は、図9に示す工程となる。図9に示す工程では、焼入れ工程S1→焼戻し工程S5→塗装前洗浄工程S2→塗装工程S3→焼付け工程S6を行う。図8及び図9に示す各工程において、塗装工程の前に塗装前洗浄工程S2を行う。この塗装前洗浄工程S2が、本発明に係るワーク洗浄装置で行うものである。 Embodiments of the present invention will be described below based on FIGS. 1 to 9. When baking the outer joint member for a constant velocity universal joint simultaneously with the baking process, the process is shown in FIG. 8. In the process shown in FIG. 8, the following steps are performed: quenching step S1→pre-painting cleaning step S2→painting step S3→tempering and baking step S4. Further, when a baking process is performed after the tempering process, the process is shown in FIG. In the process shown in FIG. 9, the following steps are performed: quenching step S1→tempering step S5→pre-painting cleaning step S2→painting step S3→baking step S6. In each step shown in FIGS. 8 and 9, a pre-painting cleaning step S2 is performed before the painting step. This pre-painting cleaning step S2 is performed by the workpiece cleaning apparatus according to the present invention.

ところで、等速自在継手用外側継手部材20(以下、単に、外側継手部材20と呼ぶ場合がある)は、図5に示すように、カップ部21とステム部22とからなる。そして、カップ部21の内径面(内球面)にボールが転動)するトラック溝が形成されている。また、ステム部22は雄スプライン部26が形成されている。 By the way, the outer joint member 20 for a constant velocity universal joint (hereinafter, sometimes simply referred to as the outer joint member 20) includes a cup portion 21 and a stem portion 22, as shown in FIG. A track groove on which the ball rolls is formed on the inner diameter surface (inner spherical surface) of the cup portion 21. Further, the stem portion 22 is formed with a male spline portion 26 .

この外側継手部材20は、図11に示す工程にて成形されるものであり、図11に示す熱処理・塗装工程14が、前記図8や図9に示す工程である。このため、この外側継手部材20には、スプライン成形時に使用した潤滑油及び冷間鍛造時に成形されるボンデ被膜C(図5参照)が付着している。この場合、ボンデ被膜Cは、カップ部21の外周面21aに形成された軸方向凹溝27と、カップ部の外周面の軸方向中央部の周方向突隆部28とに付着している。 This outer joint member 20 is molded in the process shown in FIG. 11, and the heat treatment/painting process 14 shown in FIG. 11 is the process shown in FIGS. 8 and 9. Therefore, the lubricating oil used during spline forming and the bonding film C formed during cold forging (see FIG. 5) are attached to this outer joint member 20. In this case, the bonding film C adheres to the axial groove 27 formed on the outer circumferential surface 21a of the cup portion 21 and the circumferential protrusion 28 at the axial center of the outer circumferential surface of the cup portion.

本発明に係るワーク洗浄装置は、ボンデ被膜及び潤滑油が付着した金属部品であるワークである図5に示すような外側継手部材20を洗浄するものであって、図1に示すように、ワーク(外側継手部材20)の潤滑油を除去する潤滑油除去手段31と、レーザ光をワーク(外側継手部材20)に照射することによって、ワーク(外側継手部材20)のボンデ被膜Cを剥離するレーザクリーニング手段32とを備えたものである。 The workpiece cleaning device according to the present invention cleans an outer joint member 20 as shown in FIG. A lubricating oil removal means 31 that removes lubricating oil from the workpiece (outer joint member 20), and a laser beam that peels off the bonding film C of the workpiece (outer joint member 20) by irradiating the workpiece (outer joint member 20) with laser light. The cleaning means 32 is also provided.

潤滑油除去手段31として、図3に示すように、洗浄剤Wにワークとしての外側継手部材20を浸漬する浸漬構造M1であっても、図4に示すように、洗浄剤Wをワークとしての外側継手部材20に噴射する噴射構造M2等であってもよい。 As shown in FIG. 3, the lubricating oil removing means 31 may have a dipping structure M1 in which the outer joint member 20 as a workpiece is immersed in a cleaning agent W, as shown in FIG. It may be an injection structure M2 or the like that injects to the outer joint member 20.

図3に示す浸漬構造M1は、洗浄剤Wが入った洗浄槽33に外側継手部材20を浸漬するものであり、この際、ステム部22を保持した状態で、外側継手部材20をその軸心回りに回転させても、外側継手部材20に振動を付与させてもよい。また、洗浄槽33内の洗浄剤Wを超音波により振動させ、被洗浄物(ワーク)に付着した潤滑油を外側継手部材20から落とす(除去する)超音波洗浄であってもよい。 The immersion structure M1 shown in FIG. 3 is one in which the outer joint member 20 is immersed in a cleaning tank 33 containing a cleaning agent W. At this time, the outer joint member 20 is aligned with its axis while holding the stem portion 22. The outer joint member 20 may be rotated in the same direction, or vibrations may be applied to the outer joint member 20. Alternatively, ultrasonic cleaning may be used in which the cleaning agent W in the cleaning tank 33 is vibrated by ultrasonic waves to drop (remove) lubricating oil adhering to the object to be cleaned (work) from the outer joint member 20.

噴射構造M2では、洗浄剤Wを、洗浄剤噴射装置35の噴射口36から外側継手部材20に噴射するものである。この際、外側継手部材20をその軸心回りに回転させるのが好ましい。なお、この噴射構造M2には、スプレー洗浄、シャワー洗浄、及びジェット洗浄を含む。ジェット洗浄とは、高圧の洗浄剤をワークに噴射するものであり、スプレー洗浄とは、中圧の洗浄剤をワークに噴射するものであり、シャワー洗浄とは、低圧の洗浄剤をシャワー状としてワークに噴射するものである。 In the injection structure M2, the cleaning agent W is injected from the injection port 36 of the cleaning agent injection device 35 to the outer joint member 20. At this time, it is preferable to rotate the outer joint member 20 around its axis. Note that this injection structure M2 includes spray cleaning, shower cleaning, and jet cleaning. Jet cleaning is a process in which a high-pressure cleaning agent is injected onto the workpiece, spray cleaning is injecting a medium-pressure cleaning agent onto the workpiece, and shower cleaning is a process in which a low-pressure cleaning agent is applied in the form of a shower. It is sprayed onto the workpiece.

ところで、洗浄剤Wとして、界面活性剤が含まれたアルカリ洗浄剤と、水をイオン化したアルカリ水との少なくともいずれかの弱アルカリ性洗浄剤であるのが好ましい。なお、洗浄剤Wとして、浸漬構造M1と噴射構造M2とで、相違させても、同一のものを使用してもよい。また、特開平4-371318号公報に記載されているような、ブラシを用いたブラシ洗浄であってもよい。潤滑油除去手段31は、ブラシをワークに接触させて潤滑油を除去するブラシ接触構造(図示省略)で構成されるものであってもよい。 Incidentally, it is preferable that the cleaning agent W is at least one of a weakly alkaline cleaning agent including an alkaline cleaning agent containing a surfactant and alkaline water obtained by ionizing water. In addition, as the cleaning agent W, the immersion structure M1 and the injection structure M2 may use different ones or the same one. Alternatively, brush cleaning using a brush as described in JP-A-4-371318 may also be used. The lubricating oil removing means 31 may be configured with a brush contact structure (not shown) that removes lubricating oil by bringing a brush into contact with the workpiece.

レーザクリーニングは、高いエネルギー密度のレーザ照射により個体あるいは液体の表面から構成物質が爆発的に昇華、蒸散されるレーザアブレーションと呼ばれる現象を利用している。すなわち、レーザクリーニングは、除去対象物と母材表面のレーザ照射強度による加工閾値の差を利用して加工が行われる。除去対象物のみがレーザ照射に反応し、母材表面はレーザ照射に反応しない条件でレーザを照射することでいわゆるダメージレス加工が可能になる。除去対象物を上回り、母材を下回る加工閾値のレーザ照射条件とすることにより、母材にダメージを与えることなく、除去対象物が除去可能となる。このため、除去対象物が母材を上回る加工閾値のものは、除去不可能となる。 Laser cleaning utilizes a phenomenon called laser ablation, in which constituent substances are explosively sublimated and evaporated from the surface of a solid or liquid by laser irradiation with high energy density. That is, laser cleaning is performed using the difference in processing threshold values between the object to be removed and the surface of the base material depending on the laser irradiation intensity. By irradiating the laser under conditions where only the object to be removed reacts to the laser irradiation and the surface of the base material does not react to the laser irradiation, so-called damage-free processing becomes possible. By setting the laser irradiation conditions such that the processing threshold is higher than the object to be removed and lower than the base material, the object to be removed can be removed without damaging the base material. Therefore, if the object to be removed has a processing threshold higher than the base material, it cannot be removed.

レーザクリーニング手段32に用いるレーザ照射装置としては、反射鏡(ガルバノミラー)を用いたガルバノ方式であっても、回析光学素子を用いたホモジナイザー方式であってもよく、線状あるいは面状のレーザ光をワーク(外側継手部材20)に照射するのが好ましい(効率的である)。 The laser irradiation device used in the laser cleaning means 32 may be a galvano type using a reflecting mirror (galvano mirror) or a homogenizer type using a diffractive optical element, and a linear or planar laser irradiation device may be used. It is preferable (and efficient) to irradiate the workpiece (outer joint member 20) with light.

外側継手部材20にレーザ光を照射する場合、例えば、図6に示すように、カップ部21の開口部が下方を向くように配置し、その状態で、図示省略のレーザ照射装置から外側継手部材20にレーザ光を線状として照射する。この際、図示省略の回転駆動手段にて、外側継手部材20をその軸心回りに回転可能させて、レーザ光をスキャンさせる。図6において、L(L1,L2)kはレーザ光の照射範囲(照射跡)を示している。 When irradiating the outer joint member 20 with a laser beam, for example, as shown in FIG. 20 is irradiated with a linear laser beam. At this time, the outer joint member 20 is made rotatable around its axis by a rotation driving means (not shown), and the laser beam is scanned. In FIG. 6, L(L1, L2)k indicates the irradiation range (irradiation trace) of the laser beam.

この場合、カップ部21の外周面21aに形成された軸方向凹溝27のボンデ被膜C(Ca)と、カップ部21の外周面21aの軸方向中央部の周方向突隆部28のボンデ被膜C(Cb)とを有するので、ボンデ被膜Caを除去(剥離)する場合、レーザ光の照射範囲L1がAとされ、ボンデ被膜Cbを除去(剥離)する場合、レーザ光の照射範囲L2がBとされる。ここで、照射範囲Aは、軸方向凹溝27のマウス軸方向長さであり、照射範囲Bは、周方向突隆部28の軸方向長さである。各レーザ光のマウス周方向長さは、母材(外側継手部材の母材)にダメージを与えることなく、除去対象物(ボンデ被膜C)が除去可能となるレーザ照射強度になるものでよい。なお、ボンデ被膜Cが付着していない部位にレーザ光が照射されても、レーザ照射強度による加工閾値を下回るように設定されるので、外側継手部材20の母材にダメージを与えない。 In this case, the bond coating C (Ca) of the axial groove 27 formed on the outer circumferential surface 21 a of the cup portion 21 and the bond coating of the circumferential protrusion 28 at the axial center of the outer circumferential surface 21 a of the cup portion 21 C (Cb), when removing (peeling off) the bonding film Ca, the laser beam irradiation range L1 is set to A, and when removing (peeling off) the bonding film Cb, the laser light irradiation range L2 is set to B. It is said that Here, the irradiation range A is the length of the axial groove 27 in the mouse axial direction, and the irradiation range B is the axial length of the circumferential protrusion 28 . The length of each laser beam in the mouse circumferential direction may be such that the laser irradiation intensity allows the object to be removed (bonde coating C) to be removed without damaging the base material (base material of the outer joint member). Note that even if the laser beam is irradiated to a region to which the bonding film C is not attached, the base material of the outer joint member 20 will not be damaged because the laser irradiation intensity is set to be less than the processing threshold.

ところで、図7は、外側継手部材の他の形態を示し、この場合の外側継手部材20のカップ部21の外周面には、軸方向凹溝27と、2条の周方向突隆部38,39が設けられている。このため、軸方向凹溝27のボンデ被膜Caを除去(剥離)する場合、周方向突隆部38,39のボンデ被膜Cb1,Cb2を除去(剥離)する場合とがある。 By the way, FIG. 7 shows another form of the outer joint member, in which the outer peripheral surface of the cup portion 21 of the outer joint member 20 has an axial groove 27, two circumferential protrusions 38, 39 are provided. For this reason, when removing (peeling off) the bonding film Ca on the axial groove 27, there are cases where bonding coatings Cb1 and Cb2 on the circumferential protrusions 38 and 39 are removed (peeling off).

ボンデ被膜Caを除去(剥離)する場合、レーザ光の照射範囲がAとされ、ボンデ被膜Cb1、Cb2を除去(剥離)する場合、レーザ光の照射範囲がB1、B2とされる。ここで、照射範囲Aは、軸方向凹溝27のマウス軸方向長さであり、照射範囲B1、B2は、周方向突隆部38,39の軸方向長さである。各レーザ光のマウス周方向長さは、母材(外側継手部材20の母材)にダメージを与えることなく、除去対象物(ボンデ被膜C)が除去可能となるレーザ照射強度になるものでよい。 When removing (peeling) the bonding coating Ca, the laser beam irradiation range is set to A, and when removing (peeling) the bonding coatings Cb1 and Cb2, the laser beam irradiation range is set to B1 and B2. Here, the irradiation range A is the length of the axial groove 27 in the mouse axial direction, and the irradiation ranges B1 and B2 are the axial lengths of the circumferential protrusions 38 and 39. The length of each laser beam in the mouse circumferential direction may be such that the laser irradiation intensity is such that the object to be removed (bonde coating C) can be removed without damaging the base material (base material of the outer joint member 20). .

すなわち、レーザクリーニング工程S12でのレーザ光の照射範囲(線方向長さ)Lは、ボンデ被膜Cのカップ部軸方向長さに応じて種々変更できる。 That is, the irradiation range (length in the linear direction) L of the laser light in the laser cleaning step S12 can be variously changed depending on the length in the axial direction of the cup portion of the bonding film C.

次に、図1に示すように、潤滑油除去手段31とレーザクリーニング手段32とを備えたワーク洗浄装置を用いて、潤滑油とボンデ被膜Cとを除去するワーク洗浄方法を、図2を用いて説明する。 Next, as shown in FIG. 1, a workpiece cleaning method for removing lubricating oil and bonding film C using a workpiece cleaning device equipped with a lubricating oil removing means 31 and a laser cleaning means 32 will be described using FIG. I will explain.

この場合、先ず潤滑油除去手段31にて、ワークである外側継手部材20に付着している潤滑油を除去する潤滑油除去工程S11を行う。その後、レーザクリーニング手段32にて、ワークである外側継手部材20に付着してボンデ被膜Cを除去するレーザクリーニング工程S12を行う。 In this case, first, the lubricating oil removing means 31 performs a lubricating oil removing step S11 in which lubricating oil adhering to the outer joint member 20, which is a workpiece, is removed. Thereafter, the laser cleaning means 32 performs a laser cleaning step S12 in which the bonding film C attached to the outer joint member 20, which is the workpiece, is removed.

レーザクリーニング工程終了後は、すすぎ・乾燥工程S13を行う。すなわち、ワーク(外側継手部材20)の表面に残渣する洗浄剤成分とレーザ光照射で生じたコンタミ成分を洗い流すため、お湯(例えば、約40~50℃程度の湯)または水(水道水であっても純水であってもよい)ですすぎを行い、その後、温風ブロア等の乾燥手段で水分を除去する。 After the laser cleaning process is completed, a rinsing/drying process S13 is performed. That is, in order to wash away the cleaning agent components remaining on the surface of the workpiece (outer joint member 20) and the contaminant components generated by laser beam irradiation, hot water (for example, hot water at about 40 to 50 degrees Celsius) or water (tap water, etc.) is used. After that, the water is removed by drying means such as a warm air blower.

これによって、塗装前洗浄S2が終了する。その後は、図8に示すような、塗装工程S3を行った後、焼戻し兼焼付け工程S4を行ったり、図9に示すような、塗装工程S3を行った後、焼付け工程S6を行ったりすることになる。 This completes the pre-painting cleaning S2. After that, as shown in FIG. 8, after performing a painting process S3, a tempering and baking process S4 is performed, or as shown in FIG. 9, after performing a painting process S3, a baking process S6 is performed. become.

ところで、レーザクリーニングのみで、ボンデ被膜C及び潤滑油を除去しようとした場合、レーザで照射された油の一部が旋削加工面のワーク表面に焼付き、塗料の密着を阻害する。また、弱アルカリ性洗浄剤のみでは、ボンデ被膜の未反応石鹸層の除去は可能であるが、その下の反応性石鹸層(金属石鹸層)の除去が困難である。 By the way, if an attempt is made to remove the bonding film C and lubricating oil only by laser cleaning, a part of the oil irradiated with the laser sticks to the work surface of the lathe-machined surface, which impedes the adhesion of the paint. Furthermore, although it is possible to remove the unreacted soap layer of the bonde coating using only a weak alkaline detergent, it is difficult to remove the reactive soap layer (metallic soap layer) underneath.

これらに対して、本発明に係るワーク洗浄装置およびワーク洗浄方法では、潤滑油除去手段31にてワークの潤滑油を除去することができ、レーザクリーニング手段32にてワークのボンデ被膜Cを剥離することができる。すなわち、レーザクリーニングを行う前に、ワークの潤滑油を除去を行えば、油のワーク表面の焼付きを回避することができる。しかも、潤滑油除去手段31にて、ボンデ被膜Cの除去を行う必要がないので、潤滑油除去手段31で使用する洗浄剤に、酸や強アルカリ性の洗剤を用いることなく、弱アルカリ性洗浄剤を使用することができる。 In contrast, in the workpiece cleaning apparatus and workpiece cleaning method according to the present invention, the lubricating oil removal means 31 can remove the lubricating oil from the workpiece, and the laser cleaning means 32 can remove the bonding film C from the workpiece. be able to. That is, by removing the lubricating oil from the workpiece before performing laser cleaning, it is possible to avoid oil from seizing the workpiece surface. Moreover, since it is not necessary to remove the bond film C by the lubricating oil removing means 31, the lubricating oil removing means 31 uses a weakly alkaline cleaning agent instead of an acid or strong alkaline detergent. can be used.

このため、本発明に係るワーク洗浄装置およびワーク洗浄方法、ではボンデ被膜Cおよび潤滑油が安定して除去されており、高品質の製品(金属部品、たとえば、等速自在継手用外側継手部材)を提供することができる。しかも、潤滑油を除去する際には、酸性の洗浄剤や強アルカリ性の洗浄剤を使用する必要がなく、洗浄剤として、取り扱い性に優れた弱アルカリ性の洗浄剤を使用することができ、生産性の向上およびコスト低減を図ることができる。 Therefore, in the workpiece cleaning apparatus and workpiece cleaning method according to the present invention, the bonding film C and the lubricating oil are stably removed, resulting in high quality products (metal parts, for example, outer joint members for constant velocity universal joints). can be provided. Furthermore, when removing lubricating oil, there is no need to use acidic or strong alkaline cleaning agents; instead, weakly alkaline cleaning agents that are easy to handle can be used, and productivity increases. It is possible to improve performance and reduce costs.

潤滑油除去手段31は、洗浄剤Wにワークを浸漬する浸漬構造M1で構成されても、洗浄剤Wにワークに噴射する噴射構造M2で構成されても、ブラシをワークに接触させて潤滑油を除去するブラシ接触構造(図示省略)で構成されもよい。すなわち、潤滑油除去手段に従来から使用されている公知公用の構造(装置)を用いることができ、設備の低コスト化を図ることができる。 The lubricating oil removing means 31 may be configured with an immersion structure M1 that immerses the workpiece in the cleaning agent W or an injection structure M2 that injects the cleaning agent W onto the workpiece. It may also be configured with a brush contact structure (not shown) that removes. That is, it is possible to use a conventionally known and publicly used structure (device) for the lubricating oil removing means, and it is possible to reduce the cost of the equipment.

洗浄剤として、界面活性剤が含まれたアルカリ洗浄剤と水をイオン化したアルカリ水との少なくともいずれかの弱アルカリ性洗浄剤を用いることができる。すなわち、公知公用の市販の洗浄剤を使用することで、低コスト化を図ることができる。 As the cleaning agent, at least one of a weak alkaline cleaning agent including a surfactant-containing alkaline cleaning agent and alkaline water obtained by ionizing water can be used. That is, by using a commercially available cleaning agent that is publicly known, it is possible to reduce costs.

また、カップ部21が、本発明に係るワーク洗浄方法が施された等速自在継手用外側継手部材では、カップ部21に、塗装の下地として密着性を阻害する付着物が排除されており、安定した塗装品質を得ることができ、高品質のカップ部21を提供することができる。 Further, in the outer joint member for a constant velocity universal joint in which the cup portion 21 has been subjected to the workpiece cleaning method according to the present invention, deposits that impede adhesion as a base for painting are removed from the cup portion 21, Stable coating quality can be obtained, and a high-quality cup portion 21 can be provided.

ステム部22に、本発明に係るワーク洗浄方法を施した速自在継手用外側継手部材を製造することも可能である。このような外側継手部材では、ステム部22に、塗装の下地として密着性を阻害する付着物が排除されており、安定した塗装品質を得ることができ、高品質のステム部22を提供することができる。 It is also possible to manufacture an outer joint member for a quick adjustable joint in which the stem portion 22 is subjected to the workpiece cleaning method according to the present invention. In such an outer joint member, the stem portion 22 is free of deposits that impede adhesion as a coating base, and stable coating quality can be obtained, thereby providing a high-quality stem portion 22. Can be done.

以上、本発明の実施形態につき説明したが、本発明は前記実施形態に限定されることなく種々の変形が可能であって、ワークである金属部品として、外側継手部材20に限るものではなく、ボンデ被膜C及び潤滑油が付着したものであればよく、切削油、プレス油、熱処理油、圧延油、及び引抜油等の加工油として潤滑油を使用し、かつ、これらの部品に対して冷間鍛造を行うために、ボンデ被膜Cを形成するものである。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified in various ways, and the metal component that is the work is not limited to the outer joint member 20. It is sufficient that the bonding film C and lubricating oil are attached, and lubricating oil is used as a processing oil such as cutting oil, press oil, heat treatment oil, rolling oil, and drawing oil, and these parts are cooled. A bonding film C is formed in order to perform intermediate forging.

等速自在継手として、バーフィールド型(BJ)やアンダーカットフリー型(UJ)等の固定式等速自在継手であっても、ブルオフセット型等速自在継手(DOJ)やクロスグルーブ型等速自在継手(LJ)、トリポード型等速自在継手等の摺動式等速自在継手であってもよい。トリポード型等速自在継手の場合、シングルローラタイプであっても、ダブルローラタイプであってもよい。 Constant velocity universal joints can be fixed type constant velocity universal joints such as Barfield type (BJ) or undercut free type (UJ), bull offset type constant velocity universal joints (DOJ) or cross groove type constant velocity universal joints. It may be a sliding type constant velocity universal joint such as a joint (LJ) or a tripod type constant velocity universal joint. In the case of a tripod type constant velocity universal joint, it may be a single roller type or a double roller type.

20 外側継手部材
21 カップ部
22 ステム部
31 潤滑油除去手段
32 レーザクリーニング手段
C ボンデ被膜
Ca ボンデ被膜
Cb ボンデ被膜
Cb1 ボンデ被膜
Cb1,Cb2 ボンデ被膜
S11 潤滑油除去工程
S12 塗装前洗浄工程
S13 すすぎ・乾燥工程
W 洗浄剤
20 Outer joint member 21 Cup portion 22 Stem portion 31 Lubricant oil removal means 32 Laser cleaning means C Bonde coating Ca Bonde coating Cb Bonde coating Cb1 Bonde coating Cb1, Cb2 Bonde coating S11 Lubricating oil removal process S12 Pre-painting cleaning process S13 Rinse/dry Process W Cleaning agent

Claims (9)

ボンデ被膜及び潤滑油が付着した金属部品であるワークを洗浄するワーク洗浄装置であって、
ワークの潤滑油を除去する潤滑油除去手段と、レーザ光をワークに照射することによって、ワークのボンデ被膜を剥離するレーザクリーニング手段とを備えたことを特徴とするワーク洗浄装置。
A workpiece cleaning device that cleans a workpiece that is a metal part to which a bonding film and lubricating oil are attached,
A workpiece cleaning device comprising: a lubricating oil removing means for removing lubricating oil from a workpiece; and a laser cleaning means for removing a bonding film from the workpiece by irradiating the workpiece with laser light.
潤滑油除去手段は、洗浄剤にワークを浸漬する浸漬構造で構成されることを特徴とする請求項1に記載のワーク洗浄装置。 2. The workpiece cleaning apparatus according to claim 1, wherein the lubricating oil removing means has a dipping structure for immersing the workpiece in a cleaning agent. 潤滑油除去手段は、洗浄剤にワークに噴射する噴射構造で構成されることを特徴とする請求項1に記載のワーク洗浄装置。 2. The workpiece cleaning apparatus according to claim 1, wherein the lubricating oil removing means includes an injection structure that injects cleaning agent onto the workpiece. 潤滑油除去手段は、ブラシをワークに接触させて潤滑油を除去するブラシ接触構造で構成されることを特徴とする請求項1に記載のワーク洗浄装置。 2. The workpiece cleaning device according to claim 1, wherein the lubricating oil removing means has a brush contact structure that removes the lubricating oil by bringing a brush into contact with the workpiece. 洗浄剤が、界面活性剤が含まれたアルカリ洗浄剤と水をイオン化したアルカリ水との少なくともいずれかの弱アルカリ性洗浄剤であることを特徴とする請求項2または請求項3のワーク洗浄装置。 4. The workpiece cleaning apparatus according to claim 2, wherein the cleaning agent is a weakly alkaline cleaning agent selected from at least one of an alkaline cleaning agent containing a surfactant and alkaline water obtained by ionizing water. ボンデ被膜及び潤滑油が付着した金属部品であるワークを洗浄するワーク洗浄方法であって、
洗浄剤でワークの潤滑油を除去する潤滑油除去工程と、レーザ光をワークに照射することによって、ワークのボンデ被膜を剥離するレーザクリーニング工程とを備え、潤滑油除去工程を行った後、レーザクリーニング工程を行うことを特徴とするワーク洗浄方法。
A workpiece cleaning method for cleaning a workpiece that is a metal part to which a bonding film and lubricating oil are attached, the method comprising:
The lubricating oil removal process removes the lubricating oil from the workpiece using a cleaning agent, and the laser cleaning process removes the bonding film from the workpiece by irradiating the workpiece with laser light. After the lubricating oil removal process, the laser A workpiece cleaning method characterized by performing a cleaning process.
前記金属部品が塗装される部品であり、前記請求項6に記載のワーク洗浄方法にて、金属部品からボンデ被膜及び潤滑油を除去した後、ボンデ被膜及び潤滑油が除去された金属部品に塗装を施すことを特徴とするワーク洗浄方法。 The metal part is a part to be painted, and after removing the bonding film and lubricating oil from the metal part by the workpiece cleaning method according to claim 6, painting the metal part from which the bonding film and lubricating oil have been removed. A workpiece cleaning method characterized by applying. 内径面にトルク伝達部材の転動を案内する案内溝が複数設けられたカップ部と、該カップ部の底部から軸方向外向きに延びたステム部とを備え、該ステム部に、他部材をトルク伝達可能に連結するための連結要素が設けられた等速自在継手用外側継手部材であって、
前記カップ部が、前記請求項6又は請求項7に記載のワーク洗浄方法が施されてなることを特徴とする等速自在継手用外側継手部材。
A cup portion is provided with a plurality of guide grooves for guiding the rolling of the torque transmission member on the inner diameter surface, and a stem portion extends axially outward from the bottom of the cup portion, and the stem portion is provided with other members. An outer joint member for a constant velocity universal joint provided with a connecting element for connecting in a torque-transmissible manner,
An outer joint member for a constant velocity universal joint, wherein the cup portion is subjected to the workpiece cleaning method according to claim 6 or 7.
内径面にトルク伝達部材の転動を案内する案内溝が複数設けられたカップ部と、該カップ部の底部から軸方向外向きに延びたステム部とを備え、該ステム部に、他部材をトルク伝達可能に連結するための連結要素が設けられた等速自在継手用外側継手部材であって、
前記ステム部が、前記請求項6又は請求項7に記載のワーク洗浄方法が施されてなることを特徴とする等速自在継手用外側継手部材。
A cup portion is provided with a plurality of guide grooves for guiding the rolling of the torque transmission member on the inner diameter surface, and a stem portion extends axially outward from the bottom of the cup portion, and the stem portion is provided with other members. An outer joint member for a constant velocity universal joint, which is provided with a connecting element for connecting in a torque-transmissible manner,
An outer joint member for a constant velocity universal joint, wherein the stem portion is subjected to the workpiece cleaning method according to claim 6 or 7.
JP2022143065A 2022-09-08 2022-09-08 Workpiece cleaning device, workpiece cleaning method, and outer joint member for constant velocity universal joint Pending JP2024038789A (en)

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