JPH04128146U - Built-in headstock - Google Patents
Built-in headstockInfo
- Publication number
- JPH04128146U JPH04128146U JP4464091U JP4464091U JPH04128146U JP H04128146 U JPH04128146 U JP H04128146U JP 4464091 U JP4464091 U JP 4464091U JP 4464091 U JP4464091 U JP 4464091U JP H04128146 U JPH04128146 U JP H04128146U
- Authority
- JP
- Japan
- Prior art keywords
- cooling medium
- built
- motor
- headstock
- bearing
- 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.)
- Pending
Links
- 239000002826 coolant Substances 0.000 claims abstract description 77
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 230000020169 heat generation Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 10
- 238000003754 machining Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Auxiliary Devices For Machine Tools (AREA)
- Turning (AREA)
Abstract
(57)【要約】
【目的】 軸受及びビルトインモータを効率よく冷却し
て、主軸の熱変位を防止し、加工精度を向上する。
【構成】 軸受３〜５の外周に第１冷却媒体通路１０を
備えた軸受部冷却ジャケット９を設ける。ビルトインモ
ータ６の外周に第２冷却媒体通路１２を備えたモータ部
冷却ジャケット１１を設ける。主軸２内のドローバー１
６にはその全長にわたって第３冷却媒体通路２０を形成
し、これを回転継手２２を介して冷却装置１９に接続す
る。各通路１０，１２，２０を流れる冷却媒体により軸
受３〜５及びビルトインモータ６が内外両側から冷却さ
れる。
(57) [Summary] [Purpose] To efficiently cool the bearing and built-in motor, prevent thermal displacement of the spindle, and improve machining accuracy. [Structure] A bearing cooling jacket 9 having a first cooling medium passage 10 is provided on the outer periphery of the bearings 3 to 5. A motor cooling jacket 11 having a second cooling medium passage 12 is provided around the outer periphery of the built-in motor 6. Drawbar 1 inside main shaft 2
6 is formed with a third cooling medium passage 20 over its entire length, and is connected to the cooling device 19 via a rotary joint 22. The bearings 3 to 5 and the built-in motor 6 are cooled from both inside and outside by the cooling medium flowing through each passage 10, 12, 20.
Description
【０００１】0001
この考案は、工作機械のビルトイン主軸台、特に、軸受及びビルトインモータ の冷却装置に関するものである。 This idea applies to built-in headstocks of machine tools, especially bearings and built-in motors. The invention relates to a cooling device.
【０００２】0002
この種の冷却装置を備えたビルトイン主軸台として、従来、例えば、図４に示 すような技術が知られている。図において、１は主軸台本体であり、その内部に は主軸２が挿通され、主軸２の先端部は円錐ころ軸受３、玉軸受４、円筒ころ軸 受５により主軸台本体１に対し回転可能に支持されている。６は主軸２を駆動す るビルトインモータであり、主軸台本体１に固定されたステータ７と主軸２に固 定されたロータ８とから構成されている。 Conventionally, as a built-in headstock equipped with this type of cooling device, for example, as shown in Fig. 4, Such technology is known. In the figure, 1 is the headstock main body, and inside it The main shaft 2 is inserted through the main shaft 2, and the tip of the main shaft 2 has a tapered roller bearing 3, a ball bearing 4, and a cylindrical roller shaft. It is rotatably supported with respect to the headstock main body 1 by a support 5. 6 drives the main shaft 2 It is a built-in motor with a stator 7 fixed to the headstock body 1 and a stator 7 fixed to the main shaft 2. The rotor 8 is composed of a fixed rotor 8.
【０００３】 前記各軸受３〜５の外周には軸受部冷却ジャケット９が設けられ、その外周面 には第１冷却媒体通路１０が螺旋状に形成されている。ビルトインモータ６の外 周にはモータ部冷却ジャケット１１が設けられ、その外周面には第２冷却媒体通 路１２が螺旋状に形成されている。そして、各冷却媒体通路１０，１２は主軸台 本体１の入口１３及び出口１４を介し外部の冷却装置（図示略）に接続されてい て、ビルトイン主軸台の発熱要素である軸受３〜５及びビルトインモータ６をそ れらの外側から冷却できるように構成されている。0003 A bearing cooling jacket 9 is provided on the outer periphery of each of the bearings 3 to 5, and the outer periphery thereof A first cooling medium passage 10 is formed in a spiral shape. Outside of built-in motor 6 A motor cooling jacket 11 is provided around the periphery, and a second cooling medium passage is provided on the outer peripheral surface of the motor cooling jacket 11. The channel 12 is formed in a spiral shape. Each cooling medium passage 10, 12 is connected to the headstock. It is connected to an external cooling device (not shown) through the inlet 13 and outlet 14 of the main body 1. Then, the bearings 3 to 5, which are the heat generating elements of the built-in headstock, and the built-in motor 6 are removed. They are constructed so that they can be cooled from the outside.
【０００４】0004
ところが、従来のビルトイン主軸台は、軸受３〜５及びビルトインモータ６を 外側から冷却するように構成されているため、主軸２上の発熱要素つまり軸受３ 〜５の内輪及びビルトインモータ６のロータ８を充分に冷却できず、これらの発 熱要素の熱により主軸２が加熱されて熱変位したり、軸受３〜５の温度が上昇し てグリスが早期に劣化したりするなどの不具合があった。また、従来のビルトイ ン主軸台においては、第１及び第２冷却媒体通路１０，１２が主軸台本体１及び 主軸２をほぼ全長にわたって均等に冷却しているので、軸受部とモータ部との発 熱量の差異により、主軸２が熱変位して前上がりまたは前下がり状態に反ること もあり、その結果、加工精度が著しく低下するという問題点があった。 However, the conventional built-in headstock has bearings 3 to 5 and built-in motor 6. Since it is configured to be cooled from the outside, the heat generating element on the main shaft 2, that is, the bearing 3 ~ 5 and the rotor 8 of the built-in motor 6 could not be cooled sufficiently, and these The heat of the heating element may heat the main shaft 2 and cause thermal displacement, or the temperature of the bearings 3 to 5 may rise. There were problems such as premature deterioration of the grease. In addition, traditional built toys In the headstock, the first and second cooling medium passages 10 and 12 are connected to the headstock main body 1 and Since the main shaft 2 is cooled evenly over almost its entire length, the generation of heat between the bearing and the motor is reduced. Due to the difference in the amount of heat, the main shaft 2 is thermally displaced and warped to the front-up or front-down state. As a result, there was a problem in that processing accuracy was significantly reduced.
【０００５】 そこで、この考案の課題は、主軸の熱変位を防止して加工精度を向上できるビ ルトイン主軸台を提供することにある。[0005] Therefore, the challenge of this invention was to create a system that could prevent thermal displacement of the spindle and improve machining accuracy. Our goal is to provide a root-in headstock.
【０００６】[0006]
この考案による第１の解決手段は、主軸台本体と、主軸台本体の内部に挿通し た主軸と、主軸を主軸台本体に回転可能に支持する軸受と、主軸を駆動するビル トインモータと、軸受の外周に形成した第１冷却媒体通路と、ビルトインモータ の外周に形成した第２冷却媒体通路と、第１及び第２冷却媒体通路に冷却媒体を 供給する冷却装置と、ビルトインモータ及び軸受に接合する部位の主軸に形成し た第３冷却媒体通路と、主軸の一部において第３冷却媒体通路を冷却装置に接続 する回転継手とから構成される。 The first solution based on this invention is the headstock main body and the insertion inside the headstock main body. A main shaft, a bearing that rotatably supports the main shaft on the headstock body, and a building that drives the main shaft. a built-in motor, a first cooling medium passage formed on the outer periphery of the bearing, and a built-in motor. A cooling medium is supplied to the second cooling medium passage formed on the outer periphery of the cooling medium and the first and second cooling medium passages. It is formed on the main shaft of the part that connects to the supplied cooling device, built-in motor and bearing. and a third cooling medium passage connected to a cooling device at a part of the main shaft. It consists of a rotary joint.
【０００７】 この考案による第２の解決手段は、前記主軸台本体、主軸、軸受、ビルトイン モータ、第１冷却媒体通路、第２冷却媒体通路、及び冷却装置に加え、第１冷却 媒体通路を流れる冷却媒体の流量を制御する第１流量制御バルブと、第２冷却媒 体通路を流れる冷却媒体の流量を制御する第２流量制御バルブと、軸受の発熱量 を検出する第１発熱量検出器と、ビルトインモータの発熱量を検出する第２発熱 量検出器と、各検出値に対応する冷却媒体の供給量を演算する演算手段と、その 演算値に従い第１及び第２流量制御バルブを制御するバルブコントローラとから 構成される。[0007] The second solution according to this invention is that the headstock main body, the main shaft, the bearing, and the built-in In addition to the motor, the first cooling medium passage, the second cooling medium passage, and the cooling device, the first cooling a first flow control valve that controls the flow rate of the cooling medium flowing through the medium passage; and a second cooling medium. A second flow control valve that controls the flow rate of the cooling medium flowing through the body passage, and the amount of heat generated by the bearing. A first calorific value detector detects the calorific value of the built-in motor, and a second calorific value detector detects the calorific value of the built-in motor. an amount detector, a calculation means for calculating the supply amount of cooling medium corresponding to each detected value, and a valve controller that controls the first and second flow control valves according to the calculated value; configured.
【０００８】[0008]
第１の解決手段によれば、冷却媒体が冷却装置から回転継手を介して主軸の第 ３冷却媒体通路に供給され、その通路を流れる冷却媒体により主軸と主軸上の発 熱要素、つまり、軸受の内輪及びビルトインモータのロータが冷却される。した がって、主軸の熱変位を防止して加工精度を向上でき、併せて、軸受のグリスの 劣化をも防止できる。 According to the first solution, the cooling medium is passed from the cooling device to the rotary joint of the main shaft. 3 Coolant is supplied to the cooling medium passage, and the cooling medium flowing through the passage causes the main shaft and the generation on the main shaft. The thermal elements, ie the inner race of the bearing and the rotor of the built-in motor, are cooled. did Therefore, thermal displacement of the spindle can be prevented and machining accuracy can be improved, and at the same time, bearing grease can be reduced. It can also prevent deterioration.
【０００９】 第２の解決手段によれば、軸受及びビルトインモータがそれらの発熱量に対応 した流量の冷却媒体により冷却される。したがって、例えば、高負荷低速回転時 に発熱量の大きいビルトインモータ側に多量の冷却媒体を供給したり、或いは、 低負荷高速回転時に発熱量の大きい軸受側に多量の冷却媒体を供給したりするな ど、運転条件に応じて各発熱要素の冷却量を別個に制御できる。その結果、発熱 要素から主軸台本体及び主軸に伝わる熱量を小さく、かつ、各部同程度に抑制で き、もって、主軸の熱変位による反りを防止して加工精度を向上することが可能 になる。[0009] According to the second solution, the bearings and built-in motor can handle their heat generation. It is cooled by a cooling medium of a certain flow rate. Therefore, for example, during high load low speed rotation Supply a large amount of cooling medium to the built-in motor that generates a large amount of heat, or Do not supply a large amount of cooling medium to the bearing side, which generates a large amount of heat during low-load, high-speed rotation. The cooling amount of each heat generating element can be controlled separately depending on the operating conditions. As a result, fever The amount of heat transmitted from the element to the headstock body and spindle can be reduced and suppressed to the same extent in each part. With this, it is possible to prevent warping due to thermal displacement of the spindle and improve machining accuracy. become.
【００１０】0010
以下、この考案を具体化した実施例を図面に基づいて説明する。図１は本考案 による第一実施例のビルトイン主軸台を示す断面図、図２は第二実施例のビルト イン主軸台を示す断面図、図３は図２のビルトイン主軸台の変更例を示す断面図 である。 Hereinafter, embodiments embodying this invention will be described based on the drawings. Figure 1 shows the present invention Figure 2 is a cross-sectional view showing the built-in headstock of the first embodiment. A cross-sectional view showing the built-in headstock, Figure 3 is a cross-sectional view showing a modified example of the built-in headstock in Figure 2. It is.
【００１１】 図１に示すように、第一実施例のビルトイン主軸台においては、主軸台本体１ の内部に主軸２が挿通され、主軸２の先端部は円錐ころ軸受３、玉軸受４、円筒 ころ軸受５により主軸台本体１に対し回転可能に支持されている。主軸２の中間 部にはその主軸２を駆動するビルトインモータ６が組込まれ、主軸台本体１に固 定されたステータ７と主軸２に固定されたロータ８とから構成されている。主軸 ２の内部にはドローバー１６がスライド可能に挿入され、その基端には駆動用の 油圧シリンダ１７が結合されるとともに、先端には油圧チャック１８が取付けら れている。[0011] As shown in FIG. 1, in the built-in headstock of the first embodiment, the headstock main body 1 The main shaft 2 is inserted into the interior of the It is rotatably supported with respect to the headstock main body 1 by roller bearings 5 . Middle of main shaft 2 A built-in motor 6 that drives the spindle 2 is built into the headstock body 1, and is fixed to the headstock body 1. It consists of a fixed stator 7 and a rotor 8 fixed to the main shaft 2. main shaft A draw bar 16 is slidably inserted into the inside of the draw bar 2, and a drive bar 16 is provided at the base end of the draw bar 16. A hydraulic cylinder 17 is coupled, and a hydraulic chuck 18 is attached to the tip. It is.
【００１２】 前記各軸受３〜５の外周には軸受部冷却ジャケット９が設けられ、その外周面 には、螺旋状の第１冷却媒体通路１０が軸受部のみを囲繞するように前後に２分 割して形成されている。ビルトインモータ６の外周にはモータ部冷却ジャケット １１が設けられ、その外周面には第２冷却媒体通路１２が螺旋状に形成されてい る。そして、各冷却媒体通路１０，１２は主軸台本体１の入口１３及び出口１４ を介し外部の冷却装置１９に接続されている。なお、冷却媒体として、通常は水 を使用するが、それ以外の液体または冷媒ガスも使用可能である。0012 A bearing cooling jacket 9 is provided on the outer periphery of each of the bearings 3 to 5, and the outer periphery thereof , the spiral first cooling medium passage 10 is arranged two minutes in the front and rear so as to surround only the bearing part. It is formed by dividing it. There is a motor cooling jacket on the outer periphery of the built-in motor 6. 11, and a second cooling medium passage 12 is spirally formed on the outer peripheral surface of the cooling medium passage 11. Ru. Each cooling medium passage 10, 12 has an inlet 13 and an outlet 14 of the headstock main body 1. It is connected to an external cooling device 19 via. Note that water is usually used as a cooling medium. is used, but other liquids or refrigerant gases can also be used.
【００１３】 ドローバー１６の外周面には、螺旋状の第３冷却媒体通路２０が主軸２のほぼ 全長にわたって延びるように形成されている。主軸２の基端部には、油圧シリン ダ１７のボス部２１を挟んで回転継手２２が相対回転可能に外嵌されている。そ して、主軸２の第３冷却媒体通路２０はボス部２１の通路２３及び回転継手２２ の入口２４、出口２５を介して冷却装置１９に接続されている。[0013] A spiral third cooling medium passage 20 is provided on the outer circumferential surface of the drawbar 16 almost at the center of the main shaft 2. It is formed to extend over the entire length. A hydraulic cylinder is installed at the base end of the main shaft 2. A rotary joint 22 is fitted onto the outside of the holder 17 so as to be relatively rotatable across the boss portion 21 of the holder 17. So The third cooling medium passage 20 of the main shaft 2 is connected to the passage 23 of the boss portion 21 and the rotary joint 22. It is connected to the cooling device 19 via an inlet 24 and an outlet 25 of the.
【００１４】 上記のように構成した第一実施例のビルトイン主軸台においては、冷却装置１ ９から送り出された冷却媒体が主軸台本体１の入口１３を通って第１冷却媒体通 路１０及び第２冷却媒体通路１２に供給され、各通路１０，１２を流れる冷却媒 体により軸受３〜５及びビルトインモータ６が外側から冷却される。また、冷却 装置１９から送り出された冷却媒体は回転継手２２を介してドローバー１６の第 ３冷却媒体通路２０にも供給され、その通路２０を流れる冷却媒体により主軸２ と主軸２上の発熱要素、つまり、軸受３〜５の内輪及びビルトインモータ６のロ ータ８が冷却される。したがって、この第一実施例のビルトイン主軸台によれば 、軸受３〜５及びビルトインモータ６を内外両側から効率よく冷却できる。その 結果、主軸台本体１、主軸２、及び軸受３〜５の温度上昇を抑制し、主軸２の熱 変位を防止して加工精度を向上できるとともに、軸受３〜５のグリスの劣化をも 防止することができる。[0014] In the built-in headstock of the first embodiment configured as described above, the cooling device 1 The cooling medium sent out from 9 passes through the inlet 13 of the headstock body 1 and enters the first cooling medium passage. A cooling medium supplied to the passage 10 and the second cooling medium passage 12 and flowing through each passage 10, 12. The body cools the bearings 3 to 5 and the built-in motor 6 from the outside. Also cooling The cooling medium sent out from the device 19 passes through the rotary joint 22 to the drawbar 16. 3 cooling medium passage 20, and the cooling medium flowing through the passage 20 cools the main shaft 2. and the heat generating elements on the main shaft 2, that is, the inner rings of the bearings 3 to 5 and the rotor of the built-in motor 6. The motor 8 is cooled down. Therefore, according to the built-in headstock of this first embodiment, , the bearings 3 to 5 and the built-in motor 6 can be efficiently cooled from both the inside and outside. the As a result, the temperature rise of the headstock body 1, spindle 2, and bearings 3 to 5 is suppressed, and the heat of the spindle 2 is reduced. In addition to preventing displacement and improving machining accuracy, it also prevents deterioration of the grease in bearings 3 to 5. It can be prevented.
【００１５】 第二実施例のビルトイン主軸台は、図２に示すように、主軸台本体１、主軸２ 、円錐ころ軸受３、玉軸受４、円筒ころ軸受５、ステータ７及びロータ８からな るビルトインモータ６、第１冷却媒体通路１０を備えた軸受部冷却ジャケット９ 、第２冷却媒体通路１２を備えたモータ部冷却ジャケット１１、及び冷却装置１ ９から構成されている。冷却装置１９の吐出配管２７上には、第１冷却媒体通路 １０を流れる冷却媒体の流量を制御する第１流量制御バルブ２８と、第２冷却媒 体通路１２を流れる冷却媒体の流量を制御する第２流量制御バルブ２９とが配設 されている。[0015] The built-in headstock of the second embodiment has a headstock main body 1, a main spindle 2, and , a tapered roller bearing 3, a ball bearing 4, a cylindrical roller bearing 5, a stator 7, and a rotor 8. a built-in motor 6, a bearing cooling jacket 9 equipped with a first cooling medium passage 10; , a motor cooling jacket 11 equipped with a second cooling medium passage 12, and a cooling device 1 It consists of 9. A first cooling medium passage is provided on the discharge pipe 27 of the cooling device 19. a first flow control valve 28 that controls the flow rate of the cooling medium flowing through the cooling medium 10; A second flow control valve 29 that controls the flow rate of the cooling medium flowing through the body passage 12 is provided. has been done.
【００１６】 ビルトイン主軸台を含む工作機械の各部を制御する制御装置には演算手段とし てのＣＰＵ３０が設置され、そのＣＰＵ３０には、軸受３〜５の発熱量を検出す る第１発熱量検出器３１、ビルトインモータ６の発熱量を検出する第２発熱量検 出器３２と、前記第１及び第２流量制御バルブ２８，２９を制御するバルブコン トローラ３３が接続されている。第１発熱量検出器３１は、軸受３〜５の発熱量 を直接的に検出する温度センサー、或いは、主軸２の回転数に基き軸受３〜５の 発熱量を間接的に検出する回転数センサー等によって構成される。また、第２発 熱量検出器３２は、ビルトインモータ６の発熱量を直接的に検出する温度センサ ー、或いは、ビルトインモータ６の負荷電流値に基きその発熱量を間接的に検出 する電流センサー等で構成される。そして、ＣＰＵ３０は第１及び第２発熱量検 出器３１，３２の検出値に対応する冷却媒体の供給量を演算し、その演算値に基 く流量制御信号をバルブコントローラ３３に出力するようになっている。[0016] The control device that controls each part of the machine tool, including the built-in headstock, has a calculation means. The CPU 30 is equipped with a CPU 30 that detects the amount of heat generated from the bearings 3 to 5. A first calorific value detector 31 detects the calorific value of the built-in motor 6, and a second calorific value detector detects the calorific value of the built-in motor 6. a valve controller that controls the output device 32 and the first and second flow control valves 28 and 29; A troller 33 is connected. The first calorific value detector 31 detects the calorific value of the bearings 3 to 5. A temperature sensor that directly detects the It consists of a rotation speed sensor that indirectly detects the amount of heat generated. Also, the second shot The heat quantity detector 32 is a temperature sensor that directly detects the heat quantity of the built-in motor 6. - Or indirectly detect the amount of heat generated by the built-in motor 6 based on its load current value. It consists of current sensors, etc. Then, the CPU 30 performs the first and second calorific value detection. Calculate the supply amount of cooling medium corresponding to the detected values of output devices 31 and 32, and based on the calculated value. A flow rate control signal is output to the valve controller 33.
【００１７】 したがって、この第二実施例のビルトイン主軸台によれば、第１冷却媒体通路 １０に軸受３〜５の発熱量に対応した流量の冷却媒体が供給されるとともに、第 ２冷却媒体通路１２にはビルトインモータ６の発熱量に対応した流量の冷却媒体 が供給される。それ故、例えば、高負荷低速回転時に発熱量の大きいビルトイン モータ６側に多量の冷却媒体を供給したり、或いは、低負荷高速回転時に発熱量 の大きい軸受３〜５側に多量の冷却媒体を供給したりするなど、運転条件に応じ て各発熱要素を効率よく冷却できる。その結果、発熱要素から主軸台本体１及び 主軸２に伝わる熱量を小さく、かつ、各部同程度に抑制でき、もって、主軸２の 熱変位による反りを防止して加工精度を向上することが可能になる。[0017] Therefore, according to the built-in headstock of this second embodiment, the first cooling medium passage 10 is supplied with a cooling medium at a flow rate corresponding to the calorific value of the bearings 3 to 5. 2 Coolant passage 12 has a cooling medium with a flow rate corresponding to the amount of heat generated by the built-in motor 6. is supplied. Therefore, for example, built-in equipment that generates a large amount of heat during high load and low speed rotation. Supplying a large amount of cooling medium to the motor 6 side, or reducing the amount of heat generated during low load and high speed rotation. Depending on the operating conditions, such as supplying a large amount of cooling medium to the large bearings 3 to 5, Each heat generating element can be cooled efficiently. As a result, the headstock main body 1 and The amount of heat transmitted to the main shaft 2 can be suppressed to a small level and to the same degree in each part. It is possible to prevent warping due to thermal displacement and improve processing accuracy.
【００１８】 図３に示すビルトイン主軸台は、前記第二実施例の一部を変更したもので、第 １冷却媒体通路１０が軸受部のみを囲繞するように前後に２分割して構成されて いる。各第１冷却媒体通路１０を流れる冷却媒体の流量を別個に制御できるよう に、冷却装置１９の吐出配管２７には第３流量制御バルブ３５が追加して設けら れている。また、これに関連して、ＣＰＵ３０には第３発熱量検出器３６が接続 されている。なお、図示例では、第３発熱量検出器３６は円筒ころ軸受５に対応 する位置の軸受部冷却ジャケット９に設けた温度センサー３７で構成され、第１ 発熱量検出器３１は玉軸受４に対応して設けた温度センサー３８で構成され、ま た、第２発熱量検出器３２はビルトインモータ６に設けた温度センサー３９で構 成されている。したがって、このビルトイン主軸台によれば、前記第二実施例と 同様の作用効果に加え、特に、軸受部の前部及び後部を同程度に冷却して、主軸 ２の先端部分の熱変位による反りを確実に防止できるという効果が得られる。[0018] The built-in headstock shown in Fig. 3 is a partially modified version of the second embodiment. 1. The cooling medium passage 10 is divided into two parts, front and rear, so as to surround only the bearing part. There is. The flow rate of the cooling medium flowing through each first cooling medium passage 10 can be controlled separately. In addition, a third flow control valve 35 is additionally provided in the discharge pipe 27 of the cooling device 19. It is. Additionally, in connection with this, a third calorific value detector 36 is connected to the CPU 30. has been done. In the illustrated example, the third calorific value detector 36 corresponds to the cylindrical roller bearing 5. It consists of a temperature sensor 37 installed in the bearing cooling jacket 9 at The calorific value detector 31 is composed of a temperature sensor 38 provided corresponding to the ball bearing 4. In addition, the second calorific value detector 32 consists of a temperature sensor 39 provided in the built-in motor 6. has been completed. Therefore, according to this built-in headstock, compared to the second embodiment, In addition to the same effect, the front and rear parts of the bearing can be cooled to the same degree to cool the main shaft. It is possible to reliably prevent warping of the tip portion of No. 2 due to thermal displacement.
【００１９】[0019]
以上に詳述したように、請求項１の考案によれば、主軸と主軸上の発熱要素が 冷却されるので、主軸の熱変位を防止して加工精度を向上でき、併せて、軸受の グリスの劣化をも防止できるという優れた効果を奏する。 As detailed above, according to the invention of claim 1, the main shaft and the heating element on the main shaft are Since it is cooled, it is possible to prevent thermal displacement of the spindle and improve machining accuracy. It has the excellent effect of preventing deterioration of grease.
【００２０】 請求項２の考案によれば、軸受及びビルトインモータがそれらの発熱量に対応 した流量の冷却媒体で冷却されるので、発熱要素から主軸台本体及び主軸に伝わ る熱量を小さく、かつ、各部同程度に抑制して、主軸の熱変位による反りを防止 できるという効果がある。[0020] According to the invention of claim 2, the bearing and the built-in motor correspond to the amount of heat generated by them. Since the cooling medium is used at a flow rate of The amount of heat generated in each part is kept small and to the same level to prevent warping due to thermal displacement of the main shaft. There is an effect that it can be done.
【図１】本考案による第一実施例のビルトイン主軸台を
示す断面図である。FIG. 1 is a sectional view showing a built-in headstock of a first embodiment of the present invention.
【図２】本考案による第二実施例のビルトイン主軸台を
示す断面図である。FIG. 2 is a sectional view showing a second embodiment of the built-in headstock according to the present invention.
【図３】図２のビルトイン主軸台の変更例を示す断面図
である。FIG. 3 is a sectional view showing a modification of the built-in headstock in FIG. 2;
【図４】従来のビルトイン主軸台を示す断面図である。FIG. 4 is a sectional view showing a conventional built-in headstock.
１・・主軸台本体、２・・主軸、３・・円錐ころ軸受、
４・・玉軸受、５・・円筒ころ軸受、６・・ビルトイン
モータ、７・・ステータ、８・・ロータ、９・・軸受部
冷却ジャケット、１０・・第１冷却媒体通路、１１・・
モータ部冷却ジャケット、１２・・第２冷却媒体通路、
１３・・入口、１４・・出口、１６・・ドローバー、１
７・・油圧シリンダ、１８・・油圧チャック、１９・・
冷却装置、２０・・第３冷却媒体通路、２１・・ボス
部、２２・・回転継手、２３・・通路、２４・・入口、
２５・・出口、２７・・吐出配管、２８・・第１流量制
御バルブ、２９・・第２流量制御バルブ、３０・・ＣＰ
Ｕ、３１・・第１発熱量検出器、３２・・第２発熱量検
出器、３３・・バルブコントローラ、３５・・第３流量
制御バルブ、３６・・第３発熱量検出器、３７，３８，
３９・・温度センサー。1. Headstock body, 2. Main shaft, 3. Tapered roller bearing,
4... Ball bearing, 5... Cylindrical roller bearing, 6... Built-in motor, 7... Stator, 8... Rotor, 9... Bearing cooling jacket, 10... First cooling medium passage, 11...
Motor cooling jacket, 12... second cooling medium passage,
13...Entrance, 14...Exit, 16...Drawbar, 1
7...Hydraulic cylinder, 18...Hydraulic chuck, 19...
Cooling device, 20...Third cooling medium passage, 21...Boss portion, 22...Rotary joint, 23...Passway, 24...Inlet,
25...Outlet, 27...Discharge piping, 28...First flow rate control valve, 29...Second flow rate control valve, 30...CP
U, 31...First calorific value detector, 32...Second calorific value detector, 33...Valve controller, 35...Third flow rate control valve, 36...Third calorific value detector, 37, 38 ，
39...Temperature sensor.
Claims (2)
挿通した主軸と、前記主軸を主軸台本体に回転可能に支
持する軸受と、主軸を駆動するビルトインモータと、前
記軸受の外周に形成した第１冷却媒体通路と、前記ビル
トインモータの外周に形成した第２冷却媒体通路と、前
記第１及び第２冷却媒体通路に冷却媒体を供給する冷却
装置と、ビルトインモータ及び軸受に接合する部位の主
軸に形成した第３冷却媒体通路と、主軸の一部において
前記第３冷却媒体通路を前記冷却装置に接続する回転継
手とを具備することを特徴とするビルトイン主軸台。1. A headstock body, a spindle inserted into the headstock body, a bearing that rotatably supports the spindle in the headstock body, a built-in motor that drives the spindle, and a spindle attached to the outer periphery of the bearing. A first cooling medium passage formed, a second cooling medium passage formed on the outer periphery of the built-in motor, a cooling device for supplying a cooling medium to the first and second cooling medium passages, and joined to the built-in motor and the bearing. A built-in headstock comprising: a third cooling medium passage formed in the main shaft of the section; and a rotary joint connecting the third cooling medium passage to the cooling device at a part of the main shaft.
挿通した主軸と、前記主軸を主軸台本体に回転可能に支
持する軸受と、主軸を駆動するビルトインモータと、前
記軸受の外周に形成した第１冷却媒体通路と、前記ビル
トインモータの外周に形成した第２冷却媒体通路と、前
記第１及び第２冷却媒体通路に冷却媒体を供給する冷却
装置と、第１冷却媒体通路を流れる冷却媒体の流量を制
御する第１流量制御バルブと、第２冷却媒体通路を流れ
る冷却媒体の流量を制御する第２流量制御バルブと、軸
受の発熱量を検出する第１発熱量検出器と、ビルトイン
モータの発熱量を検出する第２発熱量検出器と、前記各
検出値に対応する冷却媒体の供給量を演算する演算手段
と、前記演算値に従い前記第１及び第２流量制御バルブ
を制御するバルブコントローラとを具備することを特徴
とするビルトイン主軸台。2. A headstock main body, a main spindle inserted into the headstock main body, a bearing rotatably supporting the main spindle in the headstock main body, a built-in motor for driving the main spindle, and a built-in motor attached to the outer periphery of the bearing. A first cooling medium passage formed, a second cooling medium passage formed around the outer periphery of the built-in motor, a cooling device for supplying a cooling medium to the first and second cooling medium passages, and a cooling medium flowing through the first cooling medium passage. a first flow control valve that controls the flow rate of the coolant; a second flow control valve that controls the flow rate of the coolant flowing through the second coolant passage; a first heat generation amount detector that detects the amount of heat generated by the bearing; a second calorific value detector that detects the calorific value of the built-in motor, a calculation means that calculates a supply amount of the cooling medium corresponding to each of the detected values, and controls the first and second flow control valves according to the calculated values. A built-in headstock characterized by being equipped with a valve controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4464091U JPH04128146U (en) | 1991-05-17 | 1991-05-17 | Built-in headstock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4464091U JPH04128146U (en) | 1991-05-17 | 1991-05-17 | Built-in headstock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04128146U true JPH04128146U (en) | 1992-11-24 |
Family
ID=31924713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4464091U Pending JPH04128146U (en) | 1991-05-17 | 1991-05-17 | Built-in headstock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04128146U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001259961A (en) * | 2000-03-15 | 2001-09-25 | Disco Abrasive Syst Ltd | Processing device |
| JP2004338034A (en) * | 2003-05-15 | 2004-12-02 | Toshiba Mach Co Ltd | Method and apparatus for cooling main spindle of machine tool, and method of balancing the main spindle |
| JP2006026774A (en) * | 2004-07-14 | 2006-02-02 | Makino Milling Mach Co Ltd | Rotary shaft device |
| JP2010221360A (en) * | 2009-03-24 | 2010-10-07 | Takamatsu Machinery Co Ltd | Machine tool |
| JP2015136784A (en) * | 2014-01-24 | 2015-07-30 | オークマ株式会社 | Cooling system of rotary shaft device |
| JP2016112635A (en) * | 2014-12-12 | 2016-06-23 | Ｔｏｗａ株式会社 | Cutting device and cutting method |
| KR20190095701A (en) * | 2018-02-07 | 2019-08-16 | 두산공작기계 주식회사 | Cooling unit on rotary table of machine tools |
-
1991
- 1991-05-17 JP JP4464091U patent/JPH04128146U/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001259961A (en) * | 2000-03-15 | 2001-09-25 | Disco Abrasive Syst Ltd | Processing device |
| JP2004338034A (en) * | 2003-05-15 | 2004-12-02 | Toshiba Mach Co Ltd | Method and apparatus for cooling main spindle of machine tool, and method of balancing the main spindle |
| JP2006026774A (en) * | 2004-07-14 | 2006-02-02 | Makino Milling Mach Co Ltd | Rotary shaft device |
| JP4636824B2 (en) * | 2004-07-14 | 2011-02-23 | 株式会社牧野フライス製作所 | Rotating shaft device |
| JP2010221360A (en) * | 2009-03-24 | 2010-10-07 | Takamatsu Machinery Co Ltd | Machine tool |
| JP2015136784A (en) * | 2014-01-24 | 2015-07-30 | オークマ株式会社 | Cooling system of rotary shaft device |
| JP2016112635A (en) * | 2014-12-12 | 2016-06-23 | Ｔｏｗａ株式会社 | Cutting device and cutting method |
| KR20190095701A (en) * | 2018-02-07 | 2019-08-16 | 두산공작기계 주식회사 | Cooling unit on rotary table of machine tools |
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