JP2007113611A - Ball screw device - Google Patents
Ball screw device Download PDFInfo
- Publication number
- JP2007113611A JP2007113611A JP2005303478A JP2005303478A JP2007113611A JP 2007113611 A JP2007113611 A JP 2007113611A JP 2005303478 A JP2005303478 A JP 2005303478A JP 2005303478 A JP2005303478 A JP 2005303478A JP 2007113611 A JP2007113611 A JP 2007113611A
- Authority
- JP
- Japan
- Prior art keywords
- nut
- shaft
- raceway groove
- peripheral surface
- ball screw
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 42
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000010894 electron beam technology Methods 0.000 claims abstract description 14
- 238000010791 quenching Methods 0.000 claims description 22
- 230000000171 quenching effect Effects 0.000 claims description 22
- 230000013011 mating Effects 0.000 claims description 9
- 238000011282 treatment Methods 0.000 claims description 9
- 238000005304 joining Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 28
- 238000004519 manufacturing process Methods 0.000 abstract description 19
- 230000010485 coping Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000005255 carburizing Methods 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 229910000967 As alloy Inorganic materials 0.000 description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000005496 tempering Methods 0.000 description 4
- 238000005242 forging Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
-
- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
-
- 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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H2025/2481—Special features for facilitating the manufacturing of spindles, nuts, or sleeves of screw devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
本発明は、工作機械や産業機械、半導体製造装置、射出成形機、プレス成形機、精密機械等の機械装置の移動台の位置決め用や搬送用、動力伝達用の送り機構等に用いられるボールねじ装置に関する。 The present invention relates to a ball screw used for a feed mechanism for positioning, conveying, and power transmission of a moving table of a machine device such as a machine tool, an industrial machine, a semiconductor manufacturing apparatus, an injection molding machine, a press molding machine, or a precision machine. Relates to the device.
従来のボールねじ装置は、ねじ軸の外周面に螺旋状に形成した軸軌道溝と、ナットの内周面に形成した軸軌道溝に対向するナット軌道溝とを複数のボールを介して螺合させ、ナットの端部の外周面に一体に形成したフランジ部により機械装置の移動台に取付けて送り機構を形成している（例えば、特許文献１参照。）。
しかしながら、上述した従来の技術においては、フランジ部をナットと一体に形成しているため、フランジ部を設けたナットを形成する場合には、合金鋼等からなる丸棒から切削加工により、または鍛造加工により粗形状に成形した粗形材を切削加工により成形することが必要になる。
丸棒から切削加工により成形すると、ナットの外径およびフランジ部の外径の組合せに応じてその形状を加工することは容易であるが、フランジ部の外径とナットの外径との差が大きいために多くの材料を削り取らなければならず、材料に無駄が生ずるという問題がある。
However, in the above-described conventional technology, the flange portion is formed integrally with the nut. Therefore, when forming the nut provided with the flange portion, a round bar made of alloy steel or the like is cut or forged. It is necessary to form a rough shaped material formed into a rough shape by processing by cutting.
When forming from a round bar by cutting, it is easy to process the shape according to the combination of the outer diameter of the nut and the outer diameter of the flange, but there is a difference between the outer diameter of the flange and the outer diameter of the nut. Since the material is large, many materials have to be scraped off, and there is a problem that the material is wasted.
また、鍛造加工による粗形材を用いると、切削加工により削り取る量が少なくなるので材料の無駄を排除することができるが、ナットの外径およびフランジ部の外径の組合せに応じて多数の鍛造型を準備する必要があり、鍛造型に要する費用が増大するために多品種少量生産に対応することが困難であるという問題がある。
ねじ軸の端部に相手機械要素を取付けるための取付部を設けた場合にも同様の問題が生ずる。
In addition, the use of a rough shaped material by forging reduces the amount of material to be cut by cutting, thus eliminating waste of material. However, depending on the combination of the outer diameter of the nut and the outer diameter of the flange, a large number of forgings There is a problem that it is difficult to cope with high-mix low-volume production because a die needs to be prepared and the cost required for a forging die increases.
A similar problem occurs when an attachment portion for attaching a mating machine element is provided at the end of the screw shaft.
本発明は、上記の問題点を解決するためになされたもので、フランジ部を設けたナットや取付部を設けたねじ軸を形成する材料の無駄を排除し、多品種少量生産に容易に対応することができる手段を提供することを目的とする。 The present invention has been made to solve the above-mentioned problems, and eliminates the waste of the material for forming the nut having the flange portion and the screw shaft having the mounting portion, and easily copes with a large variety of low-volume production. It is an object of the present invention to provide means that can be used.
本発明は、上記課題を解決するために、外周面に螺旋状の軸軌道溝を形成したねじ軸と、内周面に前記軸軌道溝に対向するナット軌道溝を形成したナットと、該ナットの外周面に形成したフランジ部とを備え、前記軸軌道溝とナット軌道溝とを複数のボールを介して螺合させたボールねじ装置において、前記フランジ部を別体として形成し、前記ナットの外周面に電子ビーム溶接により接合したことを特徴とする。 In order to solve the above problems, the present invention provides a screw shaft having a spiral shaft raceway groove formed on the outer peripheral surface, a nut having a nut raceway groove facing the shaft raceway groove on the inner peripheral surface, and the nut A ball screw device in which the shaft raceway groove and the nut raceway groove are screwed together via a plurality of balls, and the flange portion is formed as a separate body. The outer peripheral surface is joined by electron beam welding.
また、外周面に螺旋状の軸軌道溝を形成したねじ軸と、内周面に前記軸軌道溝に対向するナット軌道溝を形成したナットとを備え、前記軸軌道溝とナット軌道溝とを複数のボールを介して螺合させたボールねじ装置において、前記ねじ軸の端部に取付部を設け、該取付部を別体として形成し、前記ねじ軸の端部に電子ビーム溶接により接合したことを特徴とする。 A screw shaft having a spiral shaft raceway groove formed on the outer peripheral surface; and a nut having a nut raceway groove formed on the inner peripheral surface opposite to the shaft raceway groove. In a ball screw device screwed through a plurality of balls, an attachment portion is provided at an end portion of the screw shaft, the attachment portion is formed as a separate body, and is joined to the end portion of the screw shaft by electron beam welding. It is characterized by that.
これにより、本発明は、フランジ部およびナットの削り代を最小にすることができ、製造時の材料の無駄を排除することができると共に、相手部品により組付仕様の異なる各種の仕様のボールねじ装置を迅速かつ容易に製作することができ、ボールねじ装置のナットの多品種少量生産に容易に対応することができるという効果が得られる。
また、ねじ軸および取付部の削り代を最小にすることができ、製造時の材料の無駄を排除することができると共に、相手要素部品により取付仕様の異なる各種の仕様のボールねじ装置を迅速かつ容易に製作することができ、ボールねじ装置のねじ軸の多品種少量生産に容易に対応することができるという効果が得られる。
As a result, the present invention can minimize the machining allowance of the flange portion and the nut, can eliminate the waste of materials at the time of manufacture, and has various specifications of ball screws having different assembling specifications depending on the counterpart parts. The device can be manufactured quickly and easily, and the effect of being able to easily cope with a large variety of small-quantity production of nuts of the ball screw device is obtained.
In addition, the machining allowance of the screw shaft and the mounting part can be minimized, the waste of materials at the time of manufacturing can be eliminated, and the ball screw device of various specifications with different mounting specifications depending on the counterpart element parts can be quickly and quickly It can be manufactured easily, and the effect of being able to easily cope with a large variety of small-quantity production of the screw shaft of the ball screw device can be obtained.
以下に、図面を参照して本発明によるボールねじ装置の実施例について説明する。 Embodiments of a ball screw device according to the present invention will be described below with reference to the drawings.
図１は実施例のボールねじ装置を示す断面図である。
図１において、１はボールねじ装置である。
２はボールねじ装置１のねじ軸であり、合金鋼等の鋼材で製作された棒状部材であって、その外周面には略半円弧状断面形状の軸軌道溝３が所定のリードで螺旋状に形成されており、その軸軌道溝３の表面には浸炭焼入れ等の焼入れ処理により硬化層が形成されている。
FIG. 1 is a sectional view showing a ball screw device according to an embodiment.
In FIG. 1, 1 is a ball screw device.
Reference numeral 2 denotes a screw shaft of the ball screw device 1, which is a rod-shaped member made of a steel material such as alloy steel, and an axial raceway groove 3 having a substantially semicircular arc cross-sectional shape is spirally formed with a predetermined lead on the outer peripheral surface thereof. A hardened layer is formed on the surface of the shaft raceway groove 3 by a quenching process such as carburizing and quenching.
４は取付部であり、合金鋼等の鋼材で製作され、ねじ軸２を回転支持するための図示しない転がり軸受やねじ軸２を回転させるための図示しないモータ等の相手機械要素を取付けるためにねじ軸２と同軸に設けられた円柱状部材または段付軸状部材であって、ねじ軸２の一方の端部２ａの端面に形成された取付部嵌合穴５に取付部４の外周面を嵌合させた後に電子ビーム溶接により接合される。 Reference numeral 4 denotes an attachment portion, which is made of a steel material such as alloy steel, and is used to attach a counter machine element such as a rolling bearing (not shown) for rotating and supporting the screw shaft 2 and a motor (not shown) for rotating the screw shaft 2 A cylindrical member or a stepped shaft member provided coaxially with the screw shaft 2, and the outer peripheral surface of the mounting portion 4 in the mounting portion fitting hole 5 formed in the end surface of one end portion 2 a of the screw shaft 2. Are joined together by electron beam welding.
６はボールねじ装置１のナットであり、合金鋼等の鋼材で製作された円筒状部材であって、その内周面には軸軌道溝３と対向する略半円弧状断面形状のナット軌道溝７が軸軌道溝３と同じリードで形成されており、そのナット軌道溝７の表面には焼入れ処理により硬化層が形成されている。
また、ナット６の一方の端部の端面にはボールねじ装置１の内部からの潤滑剤の漏洩や外部からの塵埃等の異物の浸入等を防止する図示しないシール体を取付けるためのシール体取付穴８設けられている。
Reference numeral 6 denotes a nut of the ball screw device 1, which is a cylindrical member made of a steel material such as alloy steel, and a nut raceway groove having a substantially semicircular arc cross-sectional shape facing the axial raceway groove 3 on the inner peripheral surface thereof. 7 is formed of the same lead as the shaft raceway groove 3, and a hardened layer is formed on the surface of the nut raceway groove 7 by a quenching process.
Further, a seal body attachment for attaching a seal body (not shown) for preventing leakage of the lubricant from the inside of the ball screw device 1 and entry of foreign matters such as dust from the outside is provided on the end surface of one end portion of the nut 6. A hole 8 is provided.
９はフランジ部であり、合金鋼等の鋼材で製作され、ナット６と同軸に設けられた円盤状部材であって、その一方のフランジ面９ａにはナット６の他方の端部の外周面が嵌合するナット嵌合穴１０が、他方のフランジ面９ｂには前記と同様のシール体取付穴８が設けられており、フランジ部９に設けた段付ボルト穴１１により図示しない機械装置の移動台の相手部品にボルト等により組付けられる。 Reference numeral 9 denotes a flange portion, which is a disc-shaped member made of a steel material such as alloy steel and provided coaxially with the nut 6, and the outer peripheral surface of the other end portion of the nut 6 is on one flange surface 9 a. The nut fitting hole 10 to be fitted is provided with a sealing body mounting hole 8 similar to the above on the other flange surface 9b, and a not-shown mechanical device is moved by a stepped bolt hole 11 provided in the flange portion 9. It is assembled to the mating parts of the base with bolts.
フランジ部９は、ナット嵌合穴１０にナット６の他方の端部の外周面を嵌合させた後に電子ビーム溶接によりナット６の外周面に接合される。
１２はボールであり、合金鋼等の鋼材またはセラミック材等で製作された球体であって、軸軌道溝３とナット軌道溝７の間を転動してねじ軸２とナット６を螺合させる。
なお、ボール１２が鋼材で製作される場合にはその表面に焼入れ処理により硬化層が形成されている。
The flange portion 9 is joined to the outer peripheral surface of the nut 6 by electron beam welding after fitting the outer peripheral surface of the other end of the nut 6 into the nut fitting hole 10.
A ball 12 is a sphere made of a steel material such as alloy steel or a ceramic material, and rolls between the shaft raceway groove 3 and the nut raceway groove 7 to screw the screw shaft 2 and the nut 6 together. .
In addition, when the ball | bowl 12 is manufactured with steel materials, the hardened layer is formed in the surface by the quenching process.
上記のねじ軸２の軸軌道溝３とこれに対向するナット６のナット軌道溝７およびこれを連結する図示しないリターンチューブにより循環路が形成され、この循環路に複数のボール１２と所定の量の潤滑剤、例えばグリースが封入される。
これにより、軸軌道溝３とナット軌道溝７とがボール１２を介して螺合し、ねじ軸２を回転させることによってボール１２が循環路を循環しながらナット６を軸方向に移動させ、ボール軸２の回転運動がナット６の直線運動に変換される。
A circulation path is formed by the shaft raceway groove 3 of the screw shaft 2, the nut raceway groove 7 of the nut 6 opposite to the shaft raceway groove 7, and a return tube (not shown) that couples this, and a plurality of balls 12 and a predetermined amount are formed in this circulation path. A lubricant, such as grease, is enclosed.
As a result, the shaft raceway groove 3 and the nut raceway groove 7 are screwed together via the ball 12, and rotating the screw shaft 2 moves the nut 6 in the axial direction while the ball 12 circulates in the circulation path. The rotational movement of the shaft 2 is converted into the linear movement of the nut 6.
上記の構成のボールねじ装置１の製造方法について説明する。
フランジ部９を設けたナット６を製造する場合は、低炭素系の鋼材、例えばＳＣＭ４２０等の比較的外径の小さい丸棒を用いてナット６を切削加工によりナット軌道溝７の研磨代を残す等して荒加工し、調質処理後にナット６の内周面を除く領域に防炭処理を施して浸炭焼入れを行い、その後防炭処理を除去してナット６の素材を形成する。
A method for manufacturing the ball screw device 1 having the above configuration will be described.
When the nut 6 provided with the flange portion 9 is manufactured, the nut 6 is left with a grinding allowance for the nut raceway groove 7 by cutting the nut 6 using a low carbon steel material, for example, a round bar having a relatively small outer diameter such as SCM420. After the tempering process, the region excluding the inner peripheral surface of the nut 6 is subjected to a carburizing treatment and carburizing and quenching is performed, and then the carburizing treatment is removed to form a material for the nut 6.
また、低炭素系の鋼材、例えばＳＣＭ４２０等の比較的外径の大きい丸棒を用いてフランジ部９を切削加工により相手部品との当接面（図１の例ではフランジ面９ａ）の研磨代を残す等して荒加工し、調質処理を行ってフランジ部９の素材を形成する。
そして、フランジ部９のナット嵌合穴１０にナット６の他方の端部の外周面を嵌合させた後に、溶接部１５を電子ビーム溶接により溶接してナット６の外周面にフランジ部９を接合する。
Further, a grinding allowance for the contact surface (flange surface 9a in the example of FIG. 1) of the flange portion 9 by cutting the flange portion 9 using a low carbon steel material, for example, a round bar having a relatively large outer diameter such as SCM420. The material of the flange portion 9 is formed by roughing and leaving a tempering process.
Then, after fitting the outer peripheral surface of the other end portion of the nut 6 into the nut fitting hole 10 of the flange portion 9, the welded portion 15 is welded by electron beam welding, and the flange portion 9 is attached to the outer peripheral surface of the nut 6. Join.
フランジ部９の接合後に、ナット６の内周面を基準としてフランジ部９の外径のナット６との同軸度および相手部品との当接面（フランジ面９ａ）のナット６との直角度を確保するように研削加工により研磨して仕上げ、ナット６のナット軌道溝７を溝研削により仕上げて本実施例の焼入れ処理を施さないフランジ部９を設けたナット６を製造する。
取付部４を設けたねじ軸２を製造する場合は、低炭素系の鋼材、例えばＳＣＭ４２０等のねじ軸２より外径の大きい丸棒を用いてねじ軸２を切削加工、または転造加工により軸軌道溝３の研磨代を残す等して荒加工し、調質処理後にねじ軸２の端部２ａに防炭処理を施して浸炭焼入れを行い、その後防炭処理を除去してねじ軸２の素材を形成する。
After joining the flange portion 9, the coaxiality with the outer diameter nut 6 of the flange portion 9 and the perpendicularity with the nut 6 of the contact surface (flange surface 9 a) with the mating part with reference to the inner peripheral surface of the nut 6. The nut 6 having the flange portion 9 that is not subjected to the quenching process of the present embodiment is manufactured by polishing and finishing by grinding so as to ensure, and finishing the nut raceway groove 7 of the nut 6 by groove grinding.
When manufacturing the screw shaft 2 provided with the mounting portion 4, the screw shaft 2 is cut or rolled by using a low carbon steel material, for example, a round bar having a larger outer diameter than the screw shaft 2 such as SCM420. Roughing is performed by leaving a grinding allowance for the shaft raceway groove 3, and after tempering treatment, the end portion 2a of the screw shaft 2 is subjected to carburizing and quenching, followed by carburizing and quenching, and then removing the charcoal-proofing treatment to remove the screw shaft 2 Form the material.
また、低炭素系の鋼材、例えばＳＣＭ４２０等の取付部４より外径の大きい丸棒を用いて取付部４を切削加工により取付部４の相手部品の取付面（図１の例では取付部４の外周面）の研磨代を残す等して荒加工し、調質処理を行って取付部４の素材を形成する。
そして、ねじ軸２の端部２ａの取付部嵌合穴５に取付部４の外周面を嵌合させた後に、溶接部１７を電子ビーム溶接により溶接してねじ軸２の端部に取付部４を接合する。
In addition, a mounting surface of a mating part of the mounting portion 4 by cutting the mounting portion 4 using a round bar having a larger outer diameter than the mounting portion 4 such as SCM420, such as a low carbon steel (the mounting portion 4 in the example of FIG. 1). The outer peripheral surface) is roughened, for example, by leaving a polishing allowance, and a tempering process is performed to form a material for the mounting portion 4.
Then, after fitting the outer peripheral surface of the mounting portion 4 into the mounting portion fitting hole 5 of the end portion 2a of the screw shaft 2, the welded portion 17 is welded by electron beam welding to attach the mounting portion to the end portion of the screw shaft 2. 4 is joined.
取付部４の接合後に、ねじ軸２の外周面を基準として取付部４の外径のねじ軸２との同軸度を確保するように研削加工により研磨して仕上げ、ねじ軸２の軸軌道溝３を溝研削により仕上げて本実施例の焼入れ処理を施さない取付部４を設けたねじ軸２を製造する。
上記のようにして形成したナット６のフランジ部９やねじ軸２の取付部４の強度は、通常加わる最大荷重（静定格荷重）の約１０倍の荷重を加えても破損しないことを検証してある。
After the mounting portion 4 is joined, the shaft shaft groove of the screw shaft 2 is polished and finished by grinding so as to ensure the coaxiality with the outer diameter screw shaft 2 of the mounting portion 4 with respect to the outer peripheral surface of the screw shaft 2. 3 is finished by groove grinding to produce a screw shaft 2 provided with a mounting portion 4 that is not subjected to the quenching treatment of this embodiment.
It was verified that the strength of the flange portion 9 of the nut 6 and the mounting portion 4 of the screw shaft 2 formed as described above did not break even when a load approximately 10 times the maximum load (static load rating) applied was applied. It is.
このようにして形成したナット６やねじ軸２は、それぞれの部品の削り代を最小にすることができるので、製造時に材料の無駄が生じることはない。
また、フランジ部９や取付部４を別体として形成するので、ナット６とねじ軸２を標準化することが可能になり、潤滑仕様や取付形状等のフランジ部９の組付仕様や取付形状等の取付部４の取付仕様が異なった各種の仕様のボールねじ装置１を迅速かつ容易に製作することができ、多品種少量生産を行う必要のあるボールねじ装置１の製造に容易に対応することができる。このことは、近年の顧客の要求の多様化に伴う各種のボールねじ装置１を製造する場合に特に有効である。
Since the nut 6 and the screw shaft 2 formed in this way can minimize the machining allowance of each part, there is no waste of material during manufacturing.
Further, since the flange portion 9 and the mounting portion 4 are formed as separate bodies, it is possible to standardize the nut 6 and the screw shaft 2, and the assembly specifications and mounting shapes of the flange portion 9 such as the lubrication specifications and mounting shapes, etc. The ball screw device 1 having various specifications with different mounting specifications of the mounting portion 4 can be quickly and easily manufactured, and can easily correspond to the manufacture of the ball screw device 1 that needs to produce a variety of products in small quantities. Can do. This is particularly effective when manufacturing various ball screw devices 1 that accompany diversification of customer requirements in recent years.
更に、フランジ部９や取付部４をナット６やねじ軸２と電子ビーム溶接により接合するので、溶接に伴う歪を微小なものとすることができ、接合後の仕上げ代を減少させて更に材料の無駄を排除することができる。
更に、フランジ部９や取付部４を別体として形成し、ナット６の内周面やねじ軸２の外周面に浸炭焼入れ等の焼入れ処理を施しても、焼入れ処理を施していないフランジ部９や取付部４を設けたナット６やねじ軸２を容易に製造することができ、組付仕様や取付仕様の小変更等に伴うフランジ部９や取付部４の追加工を容易に行うことができる。
Furthermore, since the flange portion 9 and the mounting portion 4 are joined to the nut 6 and the screw shaft 2 by electron beam welding, distortion caused by welding can be made minute, and the finishing allowance after joining can be reduced to further increase the material. Can be wasted.
Further, the flange portion 9 and the attachment portion 4 are formed as separate bodies, and even if the inner peripheral surface of the nut 6 or the outer peripheral surface of the screw shaft 2 is subjected to quenching treatment such as carburizing and quenching, the flange portion 9 that has not been subjected to quenching treatment. The nut 6 and the screw shaft 2 provided with the mounting portion 4 can be easily manufactured, and the flange portion 9 and the mounting portion 4 can be easily reworked due to a small change in the assembly specification or the mounting specification. it can.
なお、本実施例では、ナット６および取付部４の嵌合部は、それぞれの外周面を用いるとして説明したが、外周面のそれぞれの端部に段付部を設け、これを嵌合部とするようにしてもよい。
また、フランジ部９をナット６の端部の外周面に接合するとして説明したが、フランジ部９を接合する位置は端部に限らず、ナット６の軸方向の中央部等軸方向のどこであってもよい。
In this embodiment, the nut 6 and the fitting portion of the mounting portion 4 have been described as using the respective outer peripheral surfaces. However, a stepped portion is provided at each end of the outer peripheral surface, and this is used as the fitting portion. You may make it do.
Although the flange portion 9 has been described as being joined to the outer peripheral surface of the end portion of the nut 6, the position where the flange portion 9 is joined is not limited to the end portion, but is anywhere in the axial direction such as the central portion of the nut 6. May be.
この場合に、ナット嵌合穴１０はフランジ部９を軸方向に貫通するように形成し、治具等を用いてフランジ部９を位置決めを行った後に、フランジ部９の一方または両方から電子ビーム溶接により接合すればよい。
更に、取付部４をねじ軸２の一方の端部２ａに設けるとして説明したが、他方の端部にも同様にして転がり軸受等の取付部を設けるようにしてもよい。
In this case, the nut fitting hole 10 is formed so as to penetrate the flange portion 9 in the axial direction, and after positioning the flange portion 9 using a jig or the like, the electron beam is transmitted from one or both of the flange portions 9. What is necessary is just to join by welding.
Further, the mounting portion 4 has been described as being provided at one end portion 2a of the screw shaft 2. However, an attachment portion such as a rolling bearing may be similarly provided at the other end portion.
更に、ナット６の防炭処理は内周面を除く領域に施すとして説明したが、防炭処理を施す部位は前記に限らず、フランジ部９との嵌合部の外周面のみとしてもよい。
以上説明したように、本実施例では、フランジ部を別体として形成し、ナットの外周面に電子ビーム溶接により接合するようにしたことによって、フランジ部およびナットの削り代を最小にすることができ、製造時の材料の無駄を排除することができると共に、相手部品により組付仕様の異なる各種の仕様のボールねじ装置を迅速かつ容易に製作することができ、ボールねじ装置のナットの多品種少量生産に容易に対応することができる。
Furthermore, although the nut 6 has been described as being subjected to the carbon-proofing process in the region excluding the inner peripheral surface, the part subjected to the carbon-proofing process is not limited to the above, and may be only the outer peripheral surface of the fitting portion with the flange portion 9.
As described above, in this embodiment, the flange portion is formed as a separate body and joined to the outer peripheral surface of the nut by electron beam welding, thereby minimizing the machining allowance of the flange portion and the nut. It is possible to eliminate the waste of materials at the time of manufacture, and it is possible to quickly and easily manufacture ball screw devices of various specifications with different assembly specifications depending on the mating parts. It can easily handle small-volume production.
また、ナットの内周面には焼入れ処理を施し、フランジ部には焼入れ処理を施さないようにしたことによって、組付仕様の小変更等に伴う追加工を容易に行うことが可能になる。
更に、フランジ部の相手部品との当接面を、ナットとの接合後に仕上げるようにしたことによって、電子ビーム溶接時の誤差等を吸収して相手部品との組付精度を容易に確保することができる。
Further, by performing the quenching process on the inner peripheral surface of the nut and not performing the quenching process on the flange portion, it is possible to easily perform additional work accompanying a small change in the assembly specifications.
In addition, the contact surface of the flange part with the mating part is finished after joining with the nut, so that errors during electron beam welding, etc. can be absorbed and assembly accuracy with the mating part can be easily secured. Can do.
更に、取付部を別体として形成し、ねじ軸の端部に電子ビーム溶接により接合するようにしたことによって、ねじ軸および取付部の削り代を最小にすることができ、製造時の材料の無駄を排除することができると共に、相手要素部品により取付仕様の異なる各種の仕様のボールねじ装置を迅速かつ容易に製作することができ、ボールねじ装置のねじ軸の多品種少量生産に容易に対応することができる。 Furthermore, by forming the mounting part as a separate body and joining it to the end of the screw shaft by electron beam welding, the shaving allowance of the screw shaft and the mounting part can be minimized, and the material at the time of manufacture can be reduced. In addition to eliminating waste, ball screw devices of various specifications with different mounting specifications depending on the mating element parts can be manufactured quickly and easily, making it easy to handle high-mix low-volume production of ball screw device screw shafts. can do.
更にねじ軸には焼入れ処理を施し、取付部には焼入れ処理を施さないようにしたことによって、取付仕様の小変更等に伴う追加工を容易に行うことが可能になる。
なお、本実施例においては、ナットやねじ軸のナット軌道溝や軸軌道溝の硬化層を形成する焼入れ処理を浸炭焼入れとして説明したが、硬化層を形成する焼入れ処理は前記に限らず、高周波焼入れ等であってもよい。このようにすれば防炭処理を省略して製造工程の簡素化を図ることができると共に接合後においても硬化層を形成することができる。
Further, by performing the quenching process on the screw shaft and not performing the quenching process on the mounting portion, it is possible to easily perform additional work accompanying a small change in the mounting specifications.
In this embodiment, the quenching process for forming the hardened layer of the nut raceway groove and the shaft raceway groove of the nut or screw shaft has been described as carburizing quenching, but the quenching process for forming the hardened layer is not limited to the above, Quenching etc. may be sufficient. If it does in this way, a carbon-proof process can be abbreviate | omitted and a simplification of a manufacturing process can be aimed at, and also a hardened layer can be formed even after joining.
また、本実施例では、リターンチューブを連結路としてボールを循環させるチューブ式の循環方式を用いたボールねじ装置に本発明を適用した場合を例に説明したが、連結路は上記に限らず連結路をこま式やエンドキャップ式等とした循環方式のボールねじ装置に本発明を適用しても同様の効果を得ることができる。
更に、本実施例においては、ボールねじ装置のねじ軸を回転させてナットを軸方向に移動させるとして説明したが、ナットを回転させてねじ軸を軸方向に移動させる形式のボールねじ装置に本発明を適用しても同様の効果を得ることができる。
In the present embodiment, the case where the present invention is applied to a ball screw device using a tube-type circulation system that circulates a ball using a return tube as a connection path has been described as an example. However, the connection path is not limited to the above. The same effect can be obtained even if the present invention is applied to a circulation type ball screw device having a top or end cap type.
Further, in the present embodiment, it has been described that the nut is moved in the axial direction by rotating the screw shaft of the ball screw device. However, the present invention is applied to a ball screw device of the type in which the nut is rotated and the screw shaft is moved in the axial direction. Even if the invention is applied, the same effect can be obtained.
１ ボールねじ装置
２ ねじ軸
２ａ 端部
３ 軸軌道溝
４ 取付部
５ 取付部嵌合穴
６ ナット
７ ナット軌道溝
８ シール体取付穴
９ フランジ部
９ａ、９ｂ フランジ面
１０ ナット嵌合穴
１１ 段付ボルト穴
１２ ボール
１５、１７ 溶接部
DESCRIPTION OF SYMBOLS 1 Ball screw apparatus 2 Screw shaft 2a End part 3 Axial track groove 4 Mounting part 5 Mounting part fitting hole 6 Nut 7 Nut raceway groove 8 Seal body mounting hole 9 Flange part 9a, 9b Flange surface 10 Nut fitting hole 11 Stepped Bolt hole 12 Ball 15, 17 Welded part
Claims (5)
前記フランジ部を別体として形成し、前記ナットの外周面に電子ビーム溶接により接合したことを特徴とするボールねじ装置。 A screw shaft having a spiral shaft raceway groove formed on the outer peripheral surface; a nut having a nut raceway groove opposed to the shaft raceway groove on the inner peripheral surface; and a flange portion formed on the outer peripheral surface of the nut; In the ball screw device in which the shaft raceway groove and the nut raceway groove are screwed together via a plurality of balls,
The ball screw device, wherein the flange portion is formed as a separate body and joined to the outer peripheral surface of the nut by electron beam welding.
内周面に焼入れ処理を施した前記ナットに、前記フランジ部を接合したことを特徴とするボールねじ装置。 In claim 1,
A ball screw device characterized in that the flange portion is joined to the nut having an inner peripheral surface subjected to quenching treatment.
前記フランジ部は、該フランジ部により取付ける相手部品と当接する面を、前記接合後に仕上げた当接面を有することを特徴とするボールねじ装置。 In claim 1 or claim 2,
2. The ball screw device according to claim 1, wherein the flange portion has an abutting surface obtained by finishing a surface abutting against a mating part attached by the flange portion after the joining.
前記ねじ軸の端部に取付部を設け、
該取付部を別体として形成し、前記ねじ軸の端部に電子ビーム溶接により接合したことを特徴とするボールねじ装置。 A screw shaft having a spiral shaft raceway groove formed on the outer peripheral surface; and a nut having a nut raceway groove facing the shaft raceway groove on the inner peripheral surface, the shaft raceway groove and the nut raceway groove having a plurality of In a ball screw device screwed through a ball,
A mounting portion is provided at the end of the screw shaft,
A ball screw device, wherein the mounting portion is formed as a separate body and joined to an end portion of the screw shaft by electron beam welding.
外周面に焼入れ処理を施した前記ねじ軸の端部に、前記取付部接合したことを特徴とするボールねじ装置。 In claim 4,
A ball screw device, wherein the mounting portion is joined to an end portion of the screw shaft whose outer peripheral surface has been subjected to quenching treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005303478A JP4797560B2 (en) | 2005-10-18 | 2005-10-18 | Ball screw device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005303478A JP4797560B2 (en) | 2005-10-18 | 2005-10-18 | Ball screw device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007113611A true JP2007113611A (en) | 2007-05-10 |
| JP4797560B2 JP4797560B2 (en) | 2011-10-19 |
Family
ID=38095995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005303478A Expired - Fee Related JP4797560B2 (en) | 2005-10-18 | 2005-10-18 | Ball screw device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4797560B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014091486A (en) * | 2012-11-06 | 2014-05-19 | Jtekt Corp | Electric power steering device |
| JP2018002149A (en) * | 2017-09-22 | 2018-01-11 | Ntn株式会社 | In-wheel motor drive device |
| US10279675B2 (en) | 2013-12-17 | 2019-05-07 | Ntn Corporation | In-wheel motor drive device |
| WO2021018339A1 (en) * | 2019-08-01 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive |
| WO2021018338A1 (en) * | 2019-08-01 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive |
| CN113646561A (en) * | 2019-05-28 | 2021-11-12 | 舍弗勒技术股份两合公司 | Special-shaped nut of screw drive, in particular ball screw nut of ball screw drive, and method for producing same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0728234U (en) * | 1993-10-29 | 1995-05-23 | エヌティエヌ株式会社 | Outer ring of constant velocity universal joint |
| JP2001263447A (en) * | 2000-02-15 | 2001-09-26 | Rexroth Star Gmbh | Rolling element screw drive, and assembling method thereof |
| JP2003240099A (en) * | 2002-02-15 | 2003-08-27 | Mitsubishi Heavy Ind Ltd | Ball screw device and injection unit of injection molding machine with the device |
| JP2004514101A (en) * | 2000-11-14 | 2004-05-13 | イナーシエツフレル コマンディートゲゼルシャフト | Ball screw |
-
2005
- 2005-10-18 JP JP2005303478A patent/JP4797560B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0728234U (en) * | 1993-10-29 | 1995-05-23 | エヌティエヌ株式会社 | Outer ring of constant velocity universal joint |
| JP2001263447A (en) * | 2000-02-15 | 2001-09-26 | Rexroth Star Gmbh | Rolling element screw drive, and assembling method thereof |
| JP2004514101A (en) * | 2000-11-14 | 2004-05-13 | イナーシエツフレル コマンディートゲゼルシャフト | Ball screw |
| JP2003240099A (en) * | 2002-02-15 | 2003-08-27 | Mitsubishi Heavy Ind Ltd | Ball screw device and injection unit of injection molding machine with the device |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014091486A (en) * | 2012-11-06 | 2014-05-19 | Jtekt Corp | Electric power steering device |
| US10279675B2 (en) | 2013-12-17 | 2019-05-07 | Ntn Corporation | In-wheel motor drive device |
| JP2018002149A (en) * | 2017-09-22 | 2018-01-11 | Ntn株式会社 | In-wheel motor drive device |
| CN113646561A (en) * | 2019-05-28 | 2021-11-12 | 舍弗勒技术股份两合公司 | Special-shaped nut of screw drive, in particular ball screw nut of ball screw drive, and method for producing same |
| US20220205519A1 (en) * | 2019-05-28 | 2022-06-30 | Schaeffler Technologies AG & Co. KG | Profiled nut of a screw drive, in particular a ball screw nut of a ball screw drive, and method for the production thereof |
| WO2021018339A1 (en) * | 2019-08-01 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive |
| WO2021018338A1 (en) * | 2019-08-01 | 2021-02-04 | Schaeffler Technologies AG & Co. KG | Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive |
| CN114174699A (en) * | 2019-08-01 | 2022-03-11 | 舍弗勒技术股份两合公司 | Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive |
| US12007003B2 (en) | 2019-08-01 | 2024-06-11 | Schaeffler Technologies AG & Co. KG | Method for producing a threaded nut of a threaded drive, in particular a ball screw nut of a ball screw drive |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4797560B2 (en) | 2011-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4797560B2 (en) | Ball screw device | |
| US8914965B2 (en) | Processing method for brake rotor-equiped wheel bearing devices | |
| JP2014156197A (en) | Manufacturing method of hub wheel and manufacturing method of bearing device for vehicle | |
| JP4205752B2 (en) | Wheel bearing device | |
| WO2011068042A1 (en) | Method of machining sealing surface | |
| US10464151B2 (en) | Raceway groove machining method, bearing, ball screw device, machine and vehicle production method | |
| JP2008202672A (en) | Ball screw and its manufacturing method | |
| JP4534166B2 (en) | Wheel bearing module on wheel carrier | |
| JPH04307107A (en) | Flanged linear ball bearing | |
| JP3204205B2 (en) | Processing jig for constant velocity universal joint | |
| JP4888760B2 (en) | Screw shaft forming method and screw shaft of ball screw mechanism | |
| US20090046968A1 (en) | Method of Manufacturing Split Bearing Races | |
| JP4822213B2 (en) | Wheel bearing outer race | |
| JP2009191902A (en) | Wheel bearing device | |
| JP2007155037A (en) | Spline device and screw device | |
| CN113646106A (en) | Hollow shaft member and rolling device | |
| JP2008215422A (en) | Ball screw for actuator and its screw grooving method | |
| JP2008095744A (en) | Ball screw device | |
| JP2003227516A (en) | Bearing unit | |
| EP1062721A1 (en) | Actuator having improved accuracy | |
| JP2010260144A (en) | Method for machining sealing face, outside joint member for constant velocity universal joint, and wheel bearing device | |
| JP2002349585A (en) | Rolling bearing, and manufacturing method therefor | |
| JP4727541B2 (en) | Sealed rolling bearing and manufacturing method thereof | |
| RU2276293C1 (en) | Method of manufacture of bearing unit | |
| JP2005226714A (en) | Rolling part, rolling device using the same, and method of manufacturing the rolling part and the rolling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20081017 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20101021 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20101109 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110107 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110705 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110718 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140812 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |