JP2012000695A - Gear cutting machine, method of manufacturing worm wheel, and worm wheel - Google Patents

Gear cutting machine, method of manufacturing worm wheel, and worm wheel Download PDF

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JP2012000695A
JP2012000695A JP2010135695A JP2010135695A JP2012000695A JP 2012000695 A JP2012000695 A JP 2012000695A JP 2010135695 A JP2010135695 A JP 2010135695A JP 2010135695 A JP2010135695 A JP 2010135695A JP 2012000695 A JP2012000695 A JP 2012000695A
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worm wheel
tooth
hob cutter
width direction
feed amount
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JP5404535B2 (en
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Koichi Masuo
光一 増尾
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Mitsubishi Heavy Industries Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a gear cutting machine and a method of manufacturing a worm wheel, capable of easily manufacturing the worm wheel for improving lubricity, and the worm wheel capable of improving lubricity.SOLUTION: A hob cutter 11 is moved by a feed amount X1 toward a central part in its tooth width direction in the radial direction of the worm wheel 12, and an addendum surface 12a, a tooth surface 12b and a tooth bottom surface 12c are formed in the worm wheel 12, and the hob cutter 11 is moved by a feed amount X2 smaller than the feed amount X1 in the radial direction of the worm wheel 12, and oil supply surfaces 13a and 13b for supplying lubricating oil are formed in an upper end part in the tooth width direction and a lower end part in the tooth width direction of the addendum surface 12a, the tooth surface 12b and the tooth bottom surface 12c in the worm wheel 12.

Description

本発明は、ウォームホイールを製造するための歯車加工機械、及び、ウォームホイールの製造方法、及び、ウォームホイールに関する。   The present invention relates to a gear processing machine for manufacturing a worm wheel, a method for manufacturing a worm wheel, and a worm wheel.

歯車の代表的なものに、ウォームとウォームホイールとを噛み合わせたウォームギヤがある。このようなウォームギヤでは、回転中の騒音が少なく、且つ、速比を非常に大きくとることができる反面、それらの歯面間に大きなすべりが発生し、摩擦力が大きくなるため、他の歯車と比べて、発熱量が大きく、動力伝達効率が低下するという問題を有している。   A typical gear is a worm gear in which a worm and a worm wheel are engaged. In such a worm gear, there is little noise during rotation and the speed ratio can be very large, but on the other hand, a large slip occurs between the tooth surfaces, and the frictional force increases, so that with other gears In comparison, there is a problem that the amount of heat generation is large and the power transmission efficiency is lowered.

ウォームギヤにおける摩擦力の低減方法としては、ウォームとウォームホイールとの間の噛み合い部における潤滑性を向上させて、油膜による流体潤滑を促進させる方法が提案されている。具体的には、ウォームとウォームホイールとの間の噛み合い開始位置となる、ウォームホイールの歯幅方向一端側を、ウォームとウォームホイールとの間の噛み合い隙間が広くなるような形状とし、その歯幅方向一端側から、くさび効果により潤滑油を供給し易くする。   As a method for reducing the frictional force in the worm gear, a method has been proposed in which the lubricity at the meshing portion between the worm and the worm wheel is improved to promote fluid lubrication by the oil film. Specifically, one end side in the tooth width direction of the worm wheel, which is the position where meshing starts between the worm and the worm wheel, is shaped so that the meshing gap between the worm and the worm wheel is widened, and the tooth width Lubricating oil is easily supplied from the one end side in the direction by the wedge effect.

このような、潤滑性の向上を図るようにしたウォームホイールの製造方法は、例えば、特許文献１に開示されている。   Such a method for manufacturing a worm wheel designed to improve lubricity is disclosed in Patent Document 1, for example.

特開２００３−３３４７２４号公報JP 2003-334724 A

上記従来のウォームホイールの製造方法では、歯幅方向一端側の歯部及び歯溝に、その径方向外側に向けて突出する加工代部を予め成形しておき、歯切りする際に、その加工代部の一部を同時に切削することにより、歯切りによるばりの発生を抑制するようにしている。   In the above conventional worm wheel manufacturing method, a machining allowance protruding toward the outside in the radial direction is formed in advance on the tooth portion and the tooth groove on one end side in the tooth width direction, and when the gear is cut, By cutting a part of the margin at the same time, the occurrence of flash due to gear cutting is suppressed.

しかしながら、このような従来の製造方法では、成形工程と歯切り工程との２つの工程が必要となり、製造工程が複雑になってしまう。   However, in such a conventional manufacturing method, two processes, a molding process and a gear cutting process, are required, and the manufacturing process becomes complicated.

従って、本発明は上記課題を解決するものであって、潤滑性の向上を図るようにしたウォームホイールを容易に製造することができる歯車加工機械、及び、その製造方法、及び、潤滑性の向上を図ることができるウォームホイールを提供することを目的とする。   Accordingly, the present invention solves the above-described problem, and a gear processing machine capable of easily manufacturing a worm wheel designed to improve lubricity, a manufacturing method thereof, and improvement of lubricity An object is to provide a worm wheel capable of achieving the above.

上記課題を解決する本発明に係る歯車加工機械は、
ウォームホイールとホブカッタとを噛み合わせた状態で、当該ウォームホイールとホブカッタとを回転させることにより、ウォームホイールに歯切り加工を行う歯車加工機械において、
ホブカッタを、ウォームホイールの径方向に当該ウォームホイールの歯幅方向中央部に向けて第１送り量で移動させて、ウォームホイールに歯形を形成させる第１送り手段と、
ホブカッタを、その回転軸がウォームホイールの歯幅方向一端側及び他端側と対向するように移動させるカッタ移動手段と、
前記カッタ移動手段によって、ホブカッタがウォームホイールの歯幅方向一端側及び他端側と対向するように移動した後に、当該ホブカッタを、ウォームホイールの径方向に前記第１送り量よりも小さい第２送り量で移動させて、ウォームホイールの歯幅方向一端部及び他端部に、潤滑油供給用の油供給面を形成させる第２送り手段とを備える
ことを特徴とする。 A gear processing machine according to the present invention that solves the above problems is as follows.
In a gear processing machine that performs gear cutting on the worm wheel by rotating the worm wheel and the hob cutter in a state where the worm wheel and the hob cutter are engaged with each other,
First feed means for moving the hob cutter in the radial direction of the worm wheel toward the central portion in the tooth width direction of the worm wheel by a first feed amount to form a tooth profile on the worm wheel;
A cutter moving means for moving the hob cutter so that the rotation shaft thereof faces the one end side and the other end side in the tooth width direction of the worm wheel;
After the hob cutter is moved by the cutter moving means so as to face the one end side and the other end side in the tooth width direction of the worm wheel, the hob cutter is moved in a second direction smaller than the first feed amount in the radial direction of the worm wheel. And a second feeding means for forming an oil supply surface for supplying a lubricating oil at one end and the other end in the tooth width direction of the worm wheel.

上記課題を解決する本発明に係るウォームホイールの製造方法は、
ウォームホイールとホブカッタとを噛み合わせた状態で、当該ウォームホイールとホブカッタとを回転させることにより、ウォームホイールに歯切り加工を行うウォームホイールの製造方法において、
ホブカッタを、ウォームホイールの径方向に当該ウォームホイールの歯幅方向中央部に向けて第１送り量で移動させて、ウォームホイールに歯形を形成し、
ホブカッタを、その回転軸がウォームホイールの歯幅方向一端側と対向するように移動させ、
ホブカッタを、ウォームホイールの径方向に前記第１送り量よりも小さい第２送り量で移動させて、ウォームホイールの歯幅方向一端部に、潤滑油供給用の一端側油供給面を形成し、
ホブカッタを、前記一端側油供給面が形成されたウォームホイールから退避させた後、その回転軸がウォームホイールの歯幅方向他端側と対向するように移動させ、
ホブカッタを、ウォームホイールの径方向に前記第２送り量で移動させて、ウォームホイールの歯幅方向他端部に、潤滑油供給用の他端側油供給面を形成する
ことを特徴とする。 A method of manufacturing a worm wheel according to the present invention that solves the above problems is as follows.
In the method of manufacturing a worm wheel that performs gear cutting on the worm wheel by rotating the worm wheel and the hob cutter in a state where the worm wheel and the hob cutter are engaged with each other,
The hob cutter is moved in the radial direction of the worm wheel toward the center portion in the tooth width direction of the worm wheel by a first feed amount to form a tooth profile on the worm wheel,
Move the hob cutter so that its rotating shaft faces one end in the tooth width direction of the worm wheel,
The hob cutter is moved in the radial direction of the worm wheel by a second feed amount smaller than the first feed amount, and one end side oil supply surface for supplying lubricating oil is formed at one end portion in the tooth width direction of the worm wheel,
After retracting the hob cutter from the worm wheel formed with the one end side oil supply surface, the hob cutter is moved so that the rotation shaft faces the other end side in the tooth width direction of the worm wheel,
The hob cutter is moved by the second feed amount in the radial direction of the worm wheel, and the other end side oil supply surface for supplying lubricating oil is formed at the other end portion in the tooth width direction of the worm wheel.

上記課題を解決する本発明に係るウォームホイールは、
第１送り量で移動したホブカッタによって形成された歯形の歯幅方向一端部及び他端部に、前記第１送り量よりも小さい第２送り量で移動した前記ホブカッタによって形成された潤滑油供給用の油供給面を有する
ことを特徴とする。 The worm wheel according to the present invention for solving the above problems is
For lubricating oil supply formed by the hob cutter moved by a second feed amount smaller than the first feed amount at one end and the other end of the tooth width direction of the tooth profile formed by the hob cutter moved by the first feed amount It has an oil supply surface.

従って、本発明に係る歯車加工機械によれば、ホブカッタを、ウォームホイールの径方向において、第１送り手段による第１送り量よりも小さい第２送り量で移動させて、ウォームホイールの歯幅方向一端部及び他端部に、潤滑油供給用の油供給面を形成させる第２送り手段を備えることにより、潤滑性の向上を図るようにしたウォームホイールを、１つの機械で容易に製造することができる。   Therefore, according to the gear processing machine of the present invention, the hob cutter is moved in the radial direction of the worm wheel by the second feed amount smaller than the first feed amount by the first feed means, and the tooth width direction of the worm wheel Easily manufacture a worm wheel with improved lubricity by providing a second feed means for forming an oil supply surface for supplying lubricating oil at one end and the other end with a single machine. Can do.

また、本発明に係るウォームホイールの製造方法によれば、ホブカッタを、ウォームホイールの径方向において、歯形加工時における第１送り量よりも小さい第２送り量で移動させて、ウォームホイールの歯幅方向一端部及び他端部に、潤滑油供給用の一端側油供給面及び他端側油供給面を形成することにより、潤滑性の向上を図るようにしたウォームホイールを、１つのホブカッタで容易に製造することができる。   Further, according to the worm wheel manufacturing method of the present invention, the hob cutter is moved in the radial direction of the worm wheel with a second feed amount smaller than the first feed amount at the time of tooth profile processing, so that the tooth width of the worm wheel is obtained. A worm wheel designed to improve lubricity by forming one end side oil supply surface and the other end side oil supply surface for supplying lubricating oil at one end and the other end in the direction is easy with one hob cutter Can be manufactured.

更に、本発明に係るウォームホイールによれば、歯幅方向一端側及び他端側に、潤滑油供給用の油供給面を有することにより、潤滑性の向上を図ることができる。   Furthermore, according to the worm wheel according to the present invention, it is possible to improve the lubricity by providing the oil supply surface for supplying the lubricant on one end side and the other end side in the tooth width direction.

ホブカッタによるウォームホイールへのホブ加工の様子を示した図である。It is the figure which showed the mode of the hobbing to the worm wheel by a hob cutter. （ａ）〜（ｅ）は本発明の一実施例に係るウォームホイールの製造方法の手順を示した図である。(A)-(e) is the figure which showed the procedure of the manufacturing method of the worm wheel which concerns on one Example of this invention. ウォームホイールの油供給面の拡大図である。It is an enlarged view of the oil supply surface of a worm wheel.

以下、本発明に係る歯車加工機械及びウォームホイールの製造方法及びウォームホイールについて、図面を用いて詳細に説明する。   Hereinafter, a gear processing machine, a worm wheel manufacturing method, and a worm wheel according to the present invention will be described in detail with reference to the drawings.

図１に示すように、図示しないホブ盤（歯車加工機械）には、ホブカッタ１１と、このホブカッタ１１との噛み合いによってホブ切り（歯切り）されるウォームホイール１２とが、着脱可能に装着されている。ホブカッタ１１は、工具回転軸Ｂ周りに回転可能に支持されると共に、ウォームホイール１２のねじれ角に応じて旋回可能に支持されている。また、ウォームホイール１２は、図示しないウォームと噛み合うものであって、ワーク回転軸Ｃ周りに回転可能に支持されている。   As shown in FIG. 1, a hob machine (gear processing machine) (not shown) is detachably mounted with a hob cutter 11 and a worm wheel 12 that is hobbed (cogged) by meshing with the hob cutter 11. Yes. The hob cutter 11 is supported so as to be rotatable around the tool rotation axis B, and is supported so as to be able to turn according to the twist angle of the worm wheel 12. The worm wheel 12 meshes with a worm (not shown), and is supported so as to be rotatable around the workpiece rotation axis C.

なお、詳細は後述するが、ホブカッタ１１は、第１送り手段及び第２送り手段によって、所定の送り量が付与され、ウォームホイール１２への切り込みが可能となると共に、カッタ移動手段によって、ウォームホイール１２の歯幅方向の位置決めが可能となっている。   Although details will be described later, the hob cutter 11 is given a predetermined feed amount by the first feed means and the second feed means, and can be cut into the worm wheel 12, and the worm wheel can be cut by the cutter moving means. Positioning in the 12 tooth width direction is possible.

ここで、ウォームホイール１２をホブカッタ１１によりホブ切りする場合には、先ず、図２（ａ）に示すように、ホブカッタ１１を、工具回転軸Ｂ周りに回転させると共に、ウォームホイール１２のねじれ角に応じて旋回させる一方、ウォームホイール１２を、ワーク回転軸Ｃ周りに回転させる。その後、ホブカッタ１１を、その工具回転軸Ｂがウォームホイール１２の歯幅方向中央部と対向するように移動させる（カッタ移動手段）。   Here, when hobbing the worm wheel 12 with the hob cutter 11, first, as shown in FIG. 2A, the hob cutter 11 is rotated around the tool rotation axis B and the twist angle of the worm wheel 12 is set. While rotating in response, the worm wheel 12 is rotated around the workpiece rotation axis C. Thereafter, the hob cutter 11 is moved so that the tool rotation axis B faces the central portion in the tooth width direction of the worm wheel 12 (cutter moving means).

次いで、図２（ｂ）に示すように、ホブカッタ１１を、切り込み方向（ウォームホイール１２の径方向）に送り量（第１送り量）Ｘ１で移動させる（第１送り手段）。これにより、ウォームホイール１２の外周部に、歯形（歯先面１２ａ、歯面１２ｂ、歯底面１２ｃ）が形成される。   Next, as shown in FIG. 2B, the hob cutter 11 is moved by a feed amount (first feed amount) X1 in the cutting direction (the radial direction of the worm wheel 12) (first feed means). Thereby, a tooth profile (tooth tip surface 12a, tooth surface 12b, tooth bottom surface 12c) is formed on the outer peripheral portion of the worm wheel 12.

そして、図２（ｃ）に示すように、ホブカッタ１１を、歯形が形成されたウォームホイール１２から、一端、送り開始位置に退避させる。   Then, as shown in FIG. 2 (c), the hob cutter 11 is retracted from the worm wheel 12 on which the tooth profile is formed, to the feed start position.

次いで、図２（ｄ）に示すように、ホブカッタ１１を、その工具回転軸Ｂがウォームホイール１２における歯先面１２ａ、歯面１２ｂ、歯底面１２ｃの歯幅方向上端側と対向するように移動させた後（カッタ移動手段）、切り込み方向に送り量（第２送り量）Ｘ２で移動させる（第２送り手段）。このとき、送り量Ｘ２は、送り量Ｘ１よりも小さな送り量となるように設定されている。   Next, as shown in FIG. 2D, the hob cutter 11 is moved so that the tool rotation axis B faces the upper end side in the tooth width direction of the tooth tip surface 12a, tooth surface 12b, and tooth bottom surface 12c of the worm wheel 12. After being moved (cutter moving means), it is moved in the cutting direction by a feed amount (second feed amount) X2 (second feed means). At this time, the feed amount X2 is set to be a feed amount smaller than the feed amount X1.

これにより、歯先面１２ａ、歯面１２ｂ、歯底面１２ｃの歯幅方向上端部には、当該歯先面１２ａ、歯面１２ｂ、歯底面１２ｃよりも更に切り込まれたことによる、潤滑油供給用の油供給面１３ａが形成される。   As a result, lubricant oil is supplied to the upper end portions in the tooth width direction of the tooth tip surface 12a, the tooth surface 12b, and the tooth bottom surface 12c than the tooth tip surface 12a, the tooth surface 12b, and the tooth bottom surface 12c. An oil supply surface 13a is formed.

この油供給面１３ａは、ウォームホイール１２の歯幅方向上端部における周方向において、全ての歯先面１２ａ、歯面１２ｂ、歯底面１２ｃとに亘って連続的に形成された傾斜面であって、ウォームホイール１２とウォームとが噛み合ったときに、ウォームホイール１２とウォームとの間の噛み合い隙間が、その歯幅方向上端側に向かうに従って漸次広がるように傾斜している。   The oil supply surface 13a is an inclined surface formed continuously over all the tooth tip surfaces 12a, the tooth surfaces 12b, and the tooth bottom surfaces 12c in the circumferential direction at the upper end of the worm wheel 12 in the tooth width direction. When the worm wheel 12 and the worm mesh with each other, the meshing gap between the worm wheel 12 and the worm is inclined so as to gradually widen toward the upper end side in the tooth width direction.

即ち、歯先面１２ａにおける油供給面１３ａは、歯丈が、その歯幅方向上端側に向かうに従って、漸次短くなるように傾斜している。また、歯面１２ｂにおける油供給面１３ａは、歯厚が、その歯幅方向上端側に向かうに従って、漸次薄くなるように傾斜している。更に、歯底面１２ｃにおける油供給面１３ａは、歯丈が、その歯幅方向上端側に向かうに従って、漸次長くなるように傾斜している。   That is, the oil supply surface 13a in the tooth tip surface 12a is inclined so that the tooth height gradually decreases as it goes toward the upper end side in the tooth width direction. Moreover, the oil supply surface 13a in the tooth surface 12b is inclined so that the tooth thickness becomes gradually thinner toward the upper end side in the tooth width direction. Furthermore, the oil supply surface 13a in the tooth bottom surface 12c is inclined so that the tooth height gradually becomes longer toward the upper end side in the tooth width direction.

そして、図２（ｅ）に示すように、ホブカッタ１１を、ウォームホイール１２から退避させ、その工具回転軸Ｂがウォームホイール１２における歯先面１２ａ、歯面１２ｂ、歯底面１２ｃの歯幅方向下端側と対向するように移動させた後（カッタ移動手段）、切り込み方向に送り量Ｘ２で移動させる（第２送り手段）。   Then, as shown in FIG. 2 (e), the hob cutter 11 is retracted from the worm wheel 12, and the tool rotation axis B is the lower end in the tooth width direction of the tooth tip surface 12a, tooth surface 12b, and tooth bottom surface 12c of the worm wheel 12. After moving so as to face the side (cutter moving means), it is moved by a feed amount X2 in the cutting direction (second feeding means).

これにより、歯先面１２ａ、歯面１２ｂ、歯底面１２ｃの歯幅方向下端部には、当該歯先面１２ａ、歯面１２ｂ、歯底面１２ｃよりも更に切り込まれたことによる、潤滑油供給用の油供給面１３ｂが形成される。   As a result, the lubricant oil is supplied to the lower end of the tooth tip surface 12a, the tooth surface 12b, and the tooth bottom surface 12c in the tooth width direction by being further cut than the tooth tip surface 12a, the tooth surface 12b, and the tooth bottom surface 12c. An oil supply surface 13b is formed.

この油供給面１３ｂは、ウォームホイール１２の歯幅方向下端部における周方向において、全ての歯先面１２ａ、歯面１２ｂ、歯底面１２ｃとに亘って連続的に形成された傾斜面であって、ウォームホイール１２とウォームとが噛み合ったときに、ウォームホイール１２とウォームとの間の噛み合い隙間が、その歯幅方向下端側に向かうに従って漸次広がるように傾斜している。   The oil supply surface 13b is an inclined surface formed continuously over all the tooth tip surfaces 12a, the tooth surfaces 12b, and the tooth bottom surfaces 12c in the circumferential direction at the lower end of the worm wheel 12 in the tooth width direction. When the worm wheel 12 and the worm mesh with each other, the meshing gap between the worm wheel 12 and the worm is inclined so as to gradually widen toward the lower end side in the tooth width direction.

即ち、歯先面１２ａにおける油供給面１３ｂは、歯丈が、その歯幅方向下端側に向かうに従って、漸次短くなるように傾斜している。また、歯面１２ｂにおける油供給面１３ｂは、歯厚が、その歯幅方向下端側に向かうに従って、漸次薄くなるように傾斜している。更に、歯底面１２ｃにおける油供給面１３ｂは、歯丈が、その歯幅方向下端側に向かうに従って、漸次長くなるように傾斜している。   That is, the oil supply surface 13b of the tooth tip surface 12a is inclined so that the tooth height gradually decreases as it goes toward the lower end side in the tooth width direction. Moreover, the oil supply surface 13b in the tooth surface 12b is inclined so that the tooth thickness becomes gradually thinner toward the lower end side in the tooth width direction. Furthermore, the oil supply surface 13b in the tooth bottom surface 12c is inclined so that the tooth height gradually becomes longer toward the lower end side in the tooth width direction.

なお、本実施形態においては、ホブカッタ１１によって、歯幅方向上端側の油供給面１３ａを形成した後、歯幅方向下端側の油供給面１３ｂを形成するようにしたが、歯幅方向下端側の油供給面１３ｂを形成した後、歯幅方向上端側の油供給面１３ａを形成するようにしても構わない。   In the present embodiment, the hob cutter 11 forms the oil supply surface 13a on the upper end side in the tooth width direction and then forms the oil supply surface 13b on the lower end side in the tooth width direction. After the oil supply surface 13b is formed, the oil supply surface 13a on the upper end side in the tooth width direction may be formed.

よって、図１及び図３に示すように、ウォームホイール１２における歯先面１２ａ、歯面１２ｂ、歯底面１２ｃの歯幅方向上端部及び歯幅方向下端部に、傾斜した油供給面１３ａ，１３ｂを形成することにより、このウォームホイール１２とウォームとの噛み合い時において、油供給面１３ａ，１３ｂを介して、それらの歯面間に潤滑油を十分に供給することができる。   Therefore, as shown in FIGS. 1 and 3, the oil supply surfaces 13 a and 13 b are inclined at the tooth width direction upper end portion and the tooth width direction lower end portion of the tooth tip surface 12 a, the tooth surface 12 b and the tooth bottom surface 12 c of the worm wheel 12. When the worm wheel 12 is engaged with the worm, the lubricating oil can be sufficiently supplied between the tooth surfaces via the oil supply surfaces 13a and 13b.

また、上述したように、油供給面１３ａ，１３ｂを形成することにより、潤滑性の向上を図ることができるため、歯面１２ｂの当たり面積を大きくすることができ、大きな動力（トルク）を効率良く伝達することができる。言い換えれば、同じ動力伝達仕様のものを、小型にすることができる。   Further, as described above, by forming the oil supply surfaces 13a and 13b, the lubricity can be improved, so that the contact area of the tooth surface 12b can be increased, and a large power (torque) can be efficiently used. Can communicate well. In other words, the same power transmission specification can be reduced in size.

従って、本発明によれば、潤滑性の向上を図るようにしたウォームホイール１２を、１つのホブカッタ１１で容易に製造することができる。   Therefore, according to the present invention, the worm wheel 12 designed to improve the lubricity can be easily manufactured with one hob cutter 11.

本発明は、歯車寿命の延長化を図ることを目的としたウォームホイールに適用可能である。   The present invention can be applied to a worm wheel for the purpose of extending the life of a gear.

１１ ホブカッタ
１２ ウォームホイール
１２ａ 歯先面
１２ｂ 歯面
１２ｃ 歯底面
１３ａ，１３ｂ 油供給面
Ｘ１，Ｘ２ 送り量
Ｂ 工具回転軸
Ｃ ワーク回転軸 11 Hob cutter 12 Worm wheel 12a Tooth tip surface 12b Tooth surface 12c Tooth bottom surface 13a, 13b Oil supply surface X1, X2 Feed amount B Tool rotation axis C Work rotation axis

Claims (3)

ウォームホイールとホブカッタとを噛み合わせた状態で、当該ウォームホイールとホブカッタとを回転させることにより、ウォームホイールに歯切り加工を行う歯車加工機械において、
ホブカッタを、ウォームホイールの径方向に当該ウォームホイールの歯幅方向中央部に向けて第１送り量で移動させて、ウォームホイールに歯形を形成させる第１送り手段と、
ホブカッタを、その回転軸がウォームホイールの歯幅方向一端側及び他端側と対向するように移動させるカッタ移動手段と、
前記カッタ移動手段によって、ホブカッタがウォームホイールの歯幅方向一端側及び他端側と対向するように移動した後に、当該ホブカッタを、ウォームホイールの径方向に前記第１送り量よりも小さい第２送り量で移動させて、ウォームホイールの歯幅方向一端部及び他端部に、潤滑油供給用の油供給面を形成させる第２送り手段とを備える
ことを特徴とする歯車加工機械。 In a gear processing machine that performs gear cutting on the worm wheel by rotating the worm wheel and the hob cutter in a state where the worm wheel and the hob cutter are engaged with each other,
First feed means for moving the hob cutter in the radial direction of the worm wheel toward the central portion in the tooth width direction of the worm wheel by a first feed amount to form a tooth profile on the worm wheel;
A cutter moving means for moving the hob cutter so that the rotation shaft thereof faces the one end side and the other end side in the tooth width direction of the worm wheel;
After the hob cutter is moved by the cutter moving means so as to face the one end side and the other end side in the tooth width direction of the worm wheel, the hob cutter is moved in a second direction smaller than the first feed amount in the radial direction of the worm wheel. A gear processing machine comprising: a second feed unit that is moved by an amount to form an oil supply surface for supplying lubricating oil at one end and the other end in the tooth width direction of the worm wheel. ウォームホイールとホブカッタとを噛み合わせた状態で、当該ウォームホイールとホブカッタとを回転させることにより、ウォームホイールに歯切り加工を行うウォームホイールの製造方法において、
ホブカッタを、ウォームホイールの径方向に当該ウォームホイールの歯幅方向中央部に向けて第１送り量で移動させて、ウォームホイールに歯形を形成し、
ホブカッタを、その回転軸がウォームホイールの歯幅方向一端側と対向するように移動させ、
ホブカッタを、ウォームホイールの径方向に前記第１送り量よりも小さい第２送り量で移動させて、ウォームホイールの歯幅方向一端部に、潤滑油供給用の一端側油供給面を形成し、
ホブカッタを、前記一端側油供給面が形成されたウォームホイールから退避させた後、その回転軸がウォームホイールの歯幅方向他端側と対向するように移動させ、
ホブカッタを、ウォームホイールの径方向に前記第２送り量で移動させて、ウォームホイールの歯幅方向他端部に、潤滑油供給用の他端側油供給面を形成する
ことを特徴とするウォームホイールの製造方法。 In the method of manufacturing a worm wheel that performs gear cutting on the worm wheel by rotating the worm wheel and the hob cutter in a state where the worm wheel and the hob cutter are engaged with each other,
The hob cutter is moved in the radial direction of the worm wheel toward the center portion in the tooth width direction of the worm wheel by a first feed amount to form a tooth profile on the worm wheel,
Move the hob cutter so that its rotating shaft faces one end in the tooth width direction of the worm wheel,
The hob cutter is moved in the radial direction of the worm wheel by a second feed amount smaller than the first feed amount, and one end side oil supply surface for supplying lubricating oil is formed at one end portion in the tooth width direction of the worm wheel,
After retracting the hob cutter from the worm wheel formed with the one end side oil supply surface, the hob cutter is moved so that the rotation shaft faces the other end side in the tooth width direction of the worm wheel,
The hob cutter is moved by the second feed amount in the radial direction of the worm wheel, and the other end side oil supply surface for supplying lubricating oil is formed at the other end in the tooth width direction of the worm wheel. Wheel manufacturing method. 第１送り量で移動したホブカッタによって形成された歯形の歯幅方向一端部及び他端部に、前記第１送り量よりも小さい第２送り量で移動した前記ホブカッタによって形成された潤滑油供給用の油供給面を有する
ことを特徴とするウォームホイール。 For lubricating oil supply formed by the hob cutter moved by a second feed amount smaller than the first feed amount at one end and the other end of the tooth width direction of the tooth profile formed by the hob cutter moved by the first feed amount A worm wheel characterized by having an oil supply surface.
JP2010135695A 2010-06-15 2010-06-15 Gear processing machine, worm wheel manufacturing method, and worm wheel Expired - Fee Related JP5404535B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB778970A (en) * 1954-03-30 1957-07-17 Schiess Ag Worm wheel and method of making the same
US2837010A (en) * 1955-01-21 1958-06-03 Gould & Eberhardt Inc Duolineal-feed hobbing machine
JPS59219118A (en) * 1983-05-27 1984-12-10 Nagata Tekko Gear facing device
JPS62159224U (en) * 1986-04-01 1987-10-09
JPH01140916A (en) * 1987-11-26 1989-06-02 Shigeyoshi Osada Method for cutting worm gear
JPH06238516A (en) * 1993-02-10 1994-08-30 Hino Motors Ltd Chamfering device for gear

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB778970A (en) * 1954-03-30 1957-07-17 Schiess Ag Worm wheel and method of making the same
US2837010A (en) * 1955-01-21 1958-06-03 Gould & Eberhardt Inc Duolineal-feed hobbing machine
JPS59219118A (en) * 1983-05-27 1984-12-10 Nagata Tekko Gear facing device
JPS62159224U (en) * 1986-04-01 1987-10-09
JPH01140916A (en) * 1987-11-26 1989-06-02 Shigeyoshi Osada Method for cutting worm gear
JPH06238516A (en) * 1993-02-10 1994-08-30 Hino Motors Ltd Chamfering device for gear

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