JP5132501B2

JP5132501B2 - Centerless grinding machine

Info

Publication number: JP5132501B2
Application number: JP2008240154A
Authority: JP
Inventors: 幸人久保; 哲也井上
Original assignee: Koyo Machine Industries Co Ltd
Current assignee: Koyo Machine Industries Co Ltd
Priority date: 2008-09-19
Filing date: 2008-09-19
Publication date: 2013-01-30
Anticipated expiration: 2028-09-19
Also published as: JP2010069574A

Description

本発明は、研削加工部位に供給された研削液を機外に排出しつつワークを研削加工するセンタレス研削盤に関する。 The present invention relates to a centerless grinding machine that grinds a workpiece while discharging a grinding liquid supplied to a grinding part to the outside of the machine.

前記センタレス研削盤として、従来、例えば、特開平１０−１３８１３９号公報に開示されたものが知られている。このセンタレス研削盤は、矩形状をしたベッドと、外周面が相互に対向するように配設された砥石車及び調整車と、ベッド上に配設され、砥石車を水平な軸中心に回転自在に支持する砥石台と、ベッド上に配設され、調整車を軸中心に回転自在に支持する調整車台と、調整車台上であり且つ砥石車と調整車との間に配設され、これらの間でワークを支持する支持刃と、砥石車とワークとの接触部に向けて研削液を吐出するノズル体と、ノズル体に研削液を供給して吐出させる供給機構と、砥石車とワークとの接触部に供給された研削液を導いて機外に排出する排出機構とを備える。 Conventionally, as the centerless grinding machine, for example, one disclosed in JP-A-10-138139 is known. This centerless grinding machine is equipped with a rectangular bed, a grinding wheel and an adjustment wheel that are arranged so that their outer peripheral surfaces face each other, and a grinding wheel that is arranged on the bed and is rotatable about a horizontal axis. A grinding wheel support that is supported on the bed, an adjustment carriage that is rotatably supported about the adjustment wheel about the axis, and is disposed on the adjustment carriage and between the grinding wheel and the adjustment wheel. A support blade that supports the workpiece in between, a nozzle body that discharges the grinding fluid toward the contact portion between the grinding wheel and the workpiece, a supply mechanism that supplies and discharges the grinding fluid to the nozzle body, a grinding wheel and the workpiece, And a discharge mechanism that guides the grinding fluid supplied to the contact portion and discharges it to the outside of the machine.

前記排出機構１００は、図８及び図９に示すように、砥石車１０２の下方でベッド１０１に設けられた第１受け部材１１０と、ベッド１０１の幅方向両側の上部側面にそれぞれ設けられた第２受け部材１１１と、ベッド１０１の中央部で長手方向がベッド１０１の幅方向（砥石車１０２の中心軸）に沿うように且つ各受け部材１１０，１１１の下側に設けられた樋状の排出部材１１２とからなる。尚、図８において、符号１０３は調整車を示している。また、図８は、従来例に係る排出機構などの概略構成を示した平断面図であり、図９は、図８における矢示Ｅ−Ｅ方向の断面図である。 As shown in FIGS. 8 and 9, the discharge mechanism 100 includes a first receiving member 110 provided on the bed 101 below the grinding wheel 102 and first upper portions provided on the upper side surfaces on both sides in the width direction of the bed 101. Two receiving members 111 and a bowl-shaped discharge provided at the center of the bed 101 such that the longitudinal direction is along the width direction of the bed 101 (the central axis of the grinding wheel 102) and below the receiving members 110 and 111. Member 112. In FIG. 8, reference numeral 103 denotes an adjustment wheel. FIG. 8 is a plan sectional view showing a schematic configuration of a discharge mechanism and the like according to a conventional example, and FIG. 9 is a sectional view in the direction of arrows EE in FIG.

前記各受け部材１１０，１１１は、上部が開口するとともに、排出部材１１２内に研削液を流下させるための排出穴１１０ａ，１１１ａが形成されている。また、第２受け部材１１１は、排出穴１１１ａ部分の高さが最も低くなるように底面が傾斜している。前記排出部材１１２は、ベッド１０１の上部に形成された溝１０１ａ内に、研削液流動方向下流側の端部がベッド１０１の側面から突出するように且つこの下流側の端部が上流側よりも高さが低くなるように傾斜して配置され、第２受け部材１１１によって支持されている。また、排出部材１１２は、下面がベッド１０１と接触しないように溝１０１ａの底面から一定間隔を隔てた上方に配置されている。 Each of the receiving members 110 and 111 has an upper opening, and discharge holes 110a and 111a for allowing the grinding fluid to flow down are formed in the discharge member 112. Further, the bottom surface of the second receiving member 111 is inclined so that the height of the discharge hole 111a is the lowest. The discharge member 112 is inserted into a groove 101a formed in the upper part of the bed 101 so that the end on the downstream side in the grinding fluid flow direction protrudes from the side surface of the bed 101 and the end on the downstream side is more than the upstream side. It is arranged to be inclined so that its height is lowered, and is supported by the second receiving member 111. Further, the discharge member 112 is disposed above the bottom surface of the groove 101a at a predetermined interval so that the lower surface does not contact the bed 101.

そして、この排出機構１００では、供給機構によりノズル体に供給され、このノズル体から砥石車１０２とワークとの接触部に向けて吐出された研削液は、各受け部材１１０，１１１内に流入してその排出穴１１０ａ，１１１ａから排出部材１１２側に流出し、その後、この排出部材１１２により機外に排出される。 In the discharge mechanism 100, the grinding fluid supplied to the nozzle body by the supply mechanism and discharged from the nozzle body toward the contact portion between the grinding wheel 102 and the workpiece flows into the receiving members 110 and 111. Then, it flows out from the discharge holes 110a and 111a to the discharge member 112 side, and then is discharged to the outside by the discharge member 112.

特開平１０−１３８１３９号公報Japanese Patent Laid-Open No. 10-138139

しかしながら、上記従来のセンタレス研削盤では、排出部材１１２がベッド１０１の長手方向中央部に設けられているので、この排出部材１１２が邪魔になって、作業者が段取り作業やメンテナンス作業などを行う際にその作業性が悪いという問題があった。 However, in the conventional centerless grinding machine, since the discharge member 112 is provided at the center in the longitudinal direction of the bed 101, the discharge member 112 becomes an obstacle and the operator performs setup work or maintenance work. However, there was a problem that its workability was bad.

また、ベッド１０１は、通常、その軽量化のために中空構造が採用され、また、強度向上のためにリブが適宜設けられるが、図９に示すように、溝１０１ａの底面が傾斜したベッド１０１では、リブ１０４の配置位置を、砥石車１０２及び調整車１０３の対向方向（ベッド１０１の長手方向）と平行な鉛直面を基準にして左右対称にすることができないため、研削液や切りくずの熱がベッド１０１に伝達してベッド１０１が熱変形した際にその各部が複雑且つ不均一に変形し、この結果、加工精度が低下するという問題もある。 In addition, the bed 101 usually has a hollow structure for weight reduction, and ribs are appropriately provided to improve the strength. However, as shown in FIG. 9, the bed 101 has an inclined bottom surface of the groove 101a. Then, the arrangement position of the rib 104 cannot be made symmetrical with respect to a vertical plane parallel to the facing direction of the grinding wheel 102 and the adjustment wheel 103 (longitudinal direction of the bed 101). When the heat is transferred to the bed 101 and the bed 101 is thermally deformed, each part thereof is complicatedly and unevenly deformed, and as a result, there is a problem that the processing accuracy is lowered.

本発明は、以上の実情に鑑みなされたものであって、作業者の作業性を改善したり、ベッドの熱変形状態を均一にして加工精度を高めることができるセンタレス研削盤の提供をその目的とする。 The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a centerless grinding machine capable of improving the workability of an operator or increasing the processing accuracy by making the thermal deformation state of the bed uniform. And

上記目的を達成するための本発明は、
内部が中空に形成されたベッドと、外周面が相互に対向するように配設された砥石車及び調整車と、前記ベッド上に配設され、前記砥石車を水平な軸線中心に回転自在に支持する砥石台と、前記ベッド上に配設され、前記調整車を軸線中心に回転自在に支持する調整車台と、前記砥石車と調整車との間に配設され、これらの間でワークを支持する支持刃と、前記砥石車とワークとの接触部に向けて研削液を吐出する吐出手段と、前記吐出手段に研削液を供給して吐出させる供給手段と、前記砥石車とワークとの接触部に供給された研削液を導いて機外に排出する排出手段とを備えたセンタレス研削盤であって、
前記排出手段は、前記砥石車とワークとの接触部に供給された研削液を受ける受け部材と、研削液を機外に排出する樋状の排出部材と、一端が前記受け部材に接続するとともに他端が前記排出部材に接続して、前記受け部材側から前記排出部材側に向けて研削液を流通させる複数の樋状の接続部材とから構成され、
前記ベッドの上面には、前記内部空間に連通し、前記受け部材が配置される開口部が形成されてなり、
前記受け部材は、上部が開口し、前記砥石車とワークとの接触部よりも下方で前記調整車台の周縁部に配置されるように且つ少なくとも一部が前記ベッドの開口部内に収容されるように前記ベッド又は調整車台に設けられ、前記排出部材は、前記ベッドの前記砥石台側の端部且つ前記ベッドの内部空間に前記受け部材よりも低い高さ位置で長手方向が前記砥石車の軸線方向に沿うように配置され、前記各接続部材は、前記ベッドの内部空間に長手方向が前記砥石車及び調整車の対向方向に沿うように配置されてなることを特徴とするセンタレス研削盤に係る。 To achieve the above object, the present invention provides:
A bed with a hollow interior, a grinding wheel and an adjustment wheel arranged so that the outer peripheral surfaces face each other, and a wheel arranged on the bed so that the grinding wheel can rotate about a horizontal axis A grinding wheel support, an adjustment wheel arranged on the bed and rotatably supporting the adjustment wheel about its axis, and a wheel between the grinding wheel and the adjustment wheel. A supporting blade for supporting, a discharging means for discharging a grinding liquid toward a contact portion between the grinding wheel and the work, a supplying means for supplying the grinding liquid to the discharging means for discharging, and the grinding wheel and the work A centerless grinding machine provided with discharging means for guiding the grinding fluid supplied to the contact portion and discharging it outside the machine,
The discharging means includes a receiving member that receives the grinding fluid supplied to the contact portion between the grinding wheel and the workpiece, a bowl-shaped discharging member that discharges the grinding fluid to the outside of the machine, and one end connected to the receiving member. The other end is connected to the discharge member, and is composed of a plurality of bowl-shaped connection members that circulate the grinding fluid from the receiving member side toward the discharge member side,
The upper surface of the bed is formed with an opening that communicates with the internal space and in which the receiving member is disposed.
The receiving member is open at the top, and is disposed at the periphery of the adjustment carriage below the contact portion between the grinding wheel and the workpiece, and at least a part thereof is accommodated in the opening of the bed. Provided on the bed or the adjustment carriage, and the discharge member has an end on the grinding wheel base side of the bed and an inner space of the bed at a height position lower than the receiving member and the longitudinal direction is the axis of the grinding wheel According to the centerless grinding machine, the connection members are arranged in the inner space of the bed so that a longitudinal direction thereof is along a facing direction of the grinding wheel and the adjustment wheel. .

この発明によれば、供給手段により吐出手段に供給され、この吐出手段から砥石車とワークとの接触部に向けて吐出された研削液は、この後、受け部材内に流入し、接続部材内を流通して排出部材に至り、この排出部材内を通って機外に排出される。 According to this invention, the grinding fluid supplied to the discharge means by the supply means and discharged from the discharge means toward the contact portion between the grinding wheel and the workpiece is then flowed into the receiving member, Through the discharge member and discharged to the outside of the machine.

砥石車とワークとの接触部に供給された研削液は、温度上昇して受け部材内に流入するが、受け部材内の研削液は、複数の接続部材により速やかに排出部材側に流動させることができるので、温度上昇した研削液が受け部材内に滞留したり、切りくずが受け部材内に堆積するのを防止し、研削液や切りくずの熱が調整車台やベッドに伝達して熱変形するのを防止することができる。したがって、精度良くワークに研削加工を施すことができる。 The grinding fluid supplied to the contact portion between the grinding wheel and the workpiece rises in temperature and flows into the receiving member, but the grinding fluid in the receiving member is quickly flowed to the discharge member side by a plurality of connecting members. Therefore, it is possible to prevent the grinding fluid that has risen in temperature from staying in the receiving member and preventing chips from accumulating in the receiving member, and the heat of the grinding fluid and chip is transferred to the adjustment chassis and bed to cause thermal deformation. Can be prevented. Therefore, the workpiece can be ground with high accuracy.

また、排出部材の配置位置がベッドの端部であるので、作業者は、段取り作業やメンテナンス作業などを行う際に砥石車や砥石台、調整車や調整車台などに接近し易く、作業性を向上させることができる。また、排出部材の配置位置がベッドの端部であることから、この端部の３つの側面の内、研削液を排出する側面を、当該センタレス研削盤のレイアウトなどに応じて容易に変更することができ、レイアウト時に受ける制約を極力少なくして、レイアウトをフレキシブルに行うことができる。 In addition, since the position of the discharge member is at the end of the bed, the operator can easily approach the grinding wheel, grinding wheel base, adjustment wheel, adjustment carriage, etc. when performing setup work or maintenance work. Can be improved. Also, since the position of the discharge member is the end of the bed, the side of the three sides of this end that discharges the grinding fluid can be easily changed according to the layout of the centerless grinding machine. It is possible to perform layout flexibly while minimizing restrictions imposed during layout.

尚、前記受け部材は、研削液を受けるための複数の受け部を備え、前記各接続部材は、前記各受け部と前記排出部材とをそれぞれ接続するように構成されていても良い。このようにすれば、研削液の滞留や切りくずの堆積をより確実に防止してこれらをより効果的に受け部材側から排出することができる。 The receiving member may include a plurality of receiving portions for receiving the grinding fluid, and the connecting members may be configured to connect the receiving portions to the discharge member. In this way, it is possible to more reliably prevent the grinding fluid from staying and chip accumulation, and to discharge them more effectively from the receiving member side.

また、前記ベッドの内部空間には、前記砥石車及び調整車の対向方向と平行な鉛直面を基準にして左右対称となる位置に複数のリブ又は仕切部材が前記対向方向に沿って形成されていても良い。このようにすれば、研削液や切りくずの熱によりベッドが変形しても、ベッドの熱変形状態が不均一になるのを防止して加工精度が悪化するのを防止することができる。また、静剛性を高めることもでき、このことによっても加工精度を良好なものとすることができる。 Further, in the internal space of the bed, a plurality of ribs or partition members are formed along the facing direction at positions that are symmetric with respect to a vertical plane parallel to the facing direction of the grinding wheel and the adjusting wheel. May be. If it does in this way, even if a bed deform | transforms with the heat of a grinding fluid or a chip, it can prevent that the thermal deformation state of a bed becomes non-uniform | heterogenous and it can prevent that processing accuracy deteriorates. Further, the static rigidity can be increased, and this also makes it possible to improve the processing accuracy.

また、前記接続部材及び排出部材は、これらの下面に形成された複数の脚部を備え、これらの脚部を介して前記ベッドの内部空間に設置されていても良い。このようにすれば、脚部の数や大きさなどを適宜調整して接続部材及び排出部材がベッドと接触する面積を可能な限り小さくすることにより、研削液や切りくずの熱によるベッドの変形を抑制してワークを高精度に研削加工することができる。 The connection member and the discharge member may include a plurality of leg portions formed on the lower surface of the connection member and the discharge member, and may be installed in the internal space of the bed via the leg portions. In this way, the bed deformation caused by grinding fluid or chip heat can be achieved by adjusting the number and size of the leg portions as appropriate to reduce the area where the connecting member and the discharging member are in contact with the bed as much as possible. The workpiece can be ground with high accuracy while suppressing the above.

斯くして、本発明に係るセンタレス研削盤によれば、作業者の作業性を改善したり、ベッドの熱変形状態を均一にして加工精度を高めることができる。 Thus, according to the centerless grinding machine according to the present invention, the workability of the operator can be improved, or the thermal deformation state of the bed can be made uniform to increase the processing accuracy.

以下、本発明の具体的な実施形態について、添付図面に基づき説明する。尚、図１は、本発明の一実施形態に係るセンタレス研削盤の概略構成を示した平面図であり、図２は、図１における矢示Ａ−Ａ方向の断面図であり、図３は、図１における矢示Ｂ−Ｂ方向の断面図である。また、図４は、本実施形態に係る排出機構の概略構成などを示した平断面図であり、図５は、図４における矢示Ｃ−Ｃ方向の断面図であり、図６は、図４における矢示Ｄ−Ｄ方向の断面図である。 Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a plan view showing a schematic configuration of a centerless grinding machine according to one embodiment of the present invention, FIG. 2 is a cross-sectional view in the direction of arrows AA in FIG. 1, and FIG. FIG. 2 is a cross-sectional view in the direction of arrow BB in FIG. 1. 4 is a plan sectional view showing a schematic configuration of the discharge mechanism according to the present embodiment, FIG. 5 is a sectional view in the direction of arrow CC in FIG. 4, and FIG. 4 is a cross-sectional view in the direction of arrow DD in FIG.

図１乃至図６に示すように、本例のセンタレス研削盤１は、矩形状に形成されるとともに内部が中空に形成されたベッド１１と、ベッド１１の長手方向で外周面が相互に対向するように配設された砥石車２０及び調整車２１と、ベッド１１上の一端側に固設され、水平且つベッド１１の幅方向と平行な軸線中心に回転自在に砥石車２０を支持する砥石台２２と、ベッド１１上の他端側に配設され、水平或いは水平から傾いた軸線中心に回転自在に調整車２１を支持する調整車台２５と、調整車台２５上であり且つ砥石車２０と調整車２１との間に配設され、これらの間でワークＷを支持する支持刃２３と、支持刃２３の上方に配設され、砥石車２０とワークＷとの接触部に向けて研削液を吐出するノズル体３０と、ノズル体３０に研削液を供給して吐出させる供給機構３１と、砥石車２０とワークＷとの接触部に供給された研削液を機外に導く排出機構４５とを備える。 As shown in FIG. 1 to FIG. 6, the centerless grinding machine 1 of the present example has a bed 11 which is formed in a rectangular shape and has a hollow inside, and the outer peripheral surfaces of the bed 11 face each other in the longitudinal direction. The grinding wheel 20 and the adjustment wheel 21 arranged in this manner, and the grinding wheel base fixed to one end on the bed 11 and supporting the grinding wheel 20 so as to be rotatable about an axis that is horizontal and parallel to the width direction of the bed 11. 22, an adjustment wheel 25 disposed on the other end side of the bed 11 and supporting the adjustment wheel 21 so as to be rotatable about an axis line that is horizontal or inclined from the horizontal, and is adjusted with the grinding wheel 20 on the adjustment wheel 25 Between the wheel 21 and the support blade 23 that supports the workpiece W between them, and above the support blade 23, the grinding fluid is directed toward the contact portion between the grinding wheel 20 and the workpiece W. The nozzle body 30 to be discharged and the grinding liquid to the nozzle body 30 It includes a feed mechanism 31 for discharged, and a discharge mechanism 45 for guiding the grinding liquid supplied to the contact portion between the grinding wheel 20 and the workpiece W to the outside of the apparatus.

前記ベッド１１は、その一端側の内部空間が、仕切部材１２などによって複数の部屋１３，１４に仕切られており、この仕切られた部屋１３，１４内に前記排出機構４５の接続部材５１及び排出部材５０がそれぞれ配置されるようになっている。前記仕切部材１２は、図５に示すように、ベッド１１の長手方向と平行であり且つ調整車台２５の幅方向の中央位置を通る鉛直面（砥石車２０及び調整車２１の対向方向と平行な鉛直面）２５ａを基準にして左右対称となる位置にベッド１１の長手方向に沿って形成されており、また、前記内部空間には、仕切部材１２と同様に左右対称となるように複数のリブ１５がベッド１１の長手方向に沿って形成されている。更に、ベッド１１は、前記接続部材５１が配置される部屋１３に連通した開口部１６を上面に備えている。また、前記排出部材５０が配置される部屋１４は、前記部屋１３と連通するとともに、ベッド１１の幅方向の一方の側面に開口している。 The bed 11 has an internal space at one end thereof partitioned into a plurality of rooms 13 and 14 by a partition member 12 and the like, and the connection member 51 and the discharge member 45 of the discharge mechanism 45 are discharged into the partitioned rooms 13 and 14. Each member 50 is arranged. As shown in FIG. 5, the partition member 12 is parallel to the longitudinal direction of the bed 11 and passes through a central position in the width direction of the adjustment carriage 25 (parallel to the opposing direction of the grinding wheel 20 and the adjustment wheel 21). (Vertical surface) 25a is formed along the longitudinal direction of the bed 11 at a position that is symmetrical with respect to the reference 25a, and a plurality of ribs are formed in the internal space so as to be symmetrical in the same manner as the partition member 12. 15 is formed along the longitudinal direction of the bed 11. Furthermore, the bed 11 has an opening 16 on the upper surface thereof communicating with the room 13 in which the connecting member 51 is disposed. The room 14 in which the discharge member 50 is disposed communicates with the room 13 and opens on one side surface in the width direction of the bed 11.

前記砥石台２２は、調整車台２５との対向面の下部に凹部２２ａが形成されており、この凹部２２ａは、ベッド１１の開口部１６と連通している。前記砥石車２０及び調整車２１は、それぞれ駆動モータ（図示せず）により駆動されて矢示方向に回転する。前記調整車台２５は、ベッド１１上に配設されたスイベル台２６と、スイベル台２６上に配設されて砥石台２２に対し進退する方向に移動可能となった下送り台２７と、下送り台２７上に配設されて砥石台２２に対し進退する方向に移動可能となった上送り台２８とから構成されており、下送り台２７の砥石台２２側の上面に支持刃２３が固設され、上送り台２８により調整車２１が支持されている。 The grindstone table 22 has a recess 22 a formed in the lower part of the surface facing the adjustment carriage 25, and the recess 22 a communicates with the opening 16 of the bed 11. The grinding wheel 20 and the adjustment wheel 21 are each driven by a drive motor (not shown) and rotate in the direction indicated by the arrow. The adjusting carriage 25 includes a swivel base 26 disposed on the bed 11, a lower feed base 27 disposed on the swivel base 26 and movable in a direction of moving back and forth with respect to the grindstone base 22, and a lower feed The upper feed table 28 is arranged on the table 27 and is movable in the direction of moving back and forth with respect to the grindstone table 22. The support blade 23 is fixed to the upper surface of the lower feed table 27 on the grindstone table 22 side. The adjustment wheel 21 is supported by the upper feed base 28.

前記スイベル台２６は、砥石台２２の近傍に設けられたピボット機構（図示せず）により、このピボット機構（図示せず）の中心軸３５を中心として、ベッド１１上を水平面内で旋回移動可能に設けられており、旋回角調整機構３６により駆動されて旋回移動する。そして、スイベル台２６が基準状態、即ち、各送り台２７，２８の進退方向が砥石車２０の軸線と直交するような状態から旋回移動方向における位置が調整されることで、砥石車２０の軸線と調整車２１の軸線との間の角度が調整される。 The swivel base 26 can be swung on the bed 11 in a horizontal plane around a central axis 35 of the pivot mechanism (not shown) by a pivot mechanism (not shown) provided in the vicinity of the grinding wheel base 22. It is driven by the turning angle adjusting mechanism 36 and turns. Then, the position in the turning movement direction is adjusted from the state in which the swivel base 26 is in the reference state, that is, the advancing and retreating directions of the feed bases 27 and 28 are orthogonal to the axis of the grinding wheel 20. And the axis line of the adjustment wheel 21 are adjusted.

尚、前記旋回角調整機構３６は、例えば、ベッド１１上に立設されたブラケット３７と、このブラケット３７のボルト穴に挿通された調整ボルト３８と、調整ボルト３８をその軸方向に移動しないようにブラケット３７に保持する一対の保持リング３９と、保持リング３９とブラケット３７との間にそれぞれ設けられた球面座金４０とからなる。調整ボルト３８は、スイベル台２６の側面に設けられたねじ穴に螺合されており、この調整ボルト３８のねじ込み量が調整されることで、スイベル台２６がブラケット３７側に近づくように旋回移動し、また、ブラケット３７から離れるように旋回移動する。 For example, the turning angle adjusting mechanism 36 does not move the bracket 37 standing on the bed 11, the adjusting bolt 38 inserted through the bolt hole of the bracket 37, and the adjusting bolt 38 in the axial direction. And a pair of holding rings 39 held by the bracket 37, and a spherical washer 40 provided between the holding ring 39 and the bracket 37. The adjustment bolt 38 is screwed into a screw hole provided on the side surface of the swivel base 26. By adjusting the screwing amount of the adjustment bolt 38, the swivel base 26 pivots so as to approach the bracket 37 side. In addition, it pivots away from the bracket 37.

前記下送り台２７及び上送り台２８は、それぞれ駆動機構（図示せず）により駆動されて前記進退方向に移動する。そして、下送り台２７の前記進退方向における位置が調整されることで、砥石車２０と支持刃２３との間隔が調整され、また、上送り台２８の前記進退方向における位置が調整されることで、砥石車２０及び支持刃２３と調整車２１との間隔が調整される。 The lower feed table 27 and the upper feed table 28 are driven by a drive mechanism (not shown), respectively, and move in the advance / retreat direction. And the space | interval of the grinding wheel 20 and the support blade 23 is adjusted by adjusting the position in the said advance / retreat direction of the lower feed stand 27, and the position in the said advance / retreat direction of the upper feed stand 28 is adjusted. Thus, the distance between the grinding wheel 20 and the support blade 23 and the adjustment wheel 21 is adjusted.

前記ノズル体３０は、ベッド１１の幅方向に平行なスリット状の開口部（図示せず）を有し、この開口部（図示せず）から研削液を吐出する。前記供給機構３１は、研削液が貯留される貯留タンク３２と、貯留タンク３２内の研削液をノズル体３０に供給する供給ポンプ３３とから構成される。 The nozzle body 30 has a slit-like opening (not shown) parallel to the width direction of the bed 11 and discharges the grinding liquid from the opening (not shown). The supply mechanism 31 includes a storage tank 32 that stores the grinding fluid, and a supply pump 33 that supplies the grinding fluid in the storage tank 32 to the nozzle body 30.

前記排出機構４５は、砥石車２０とワークＷとの接触部に供給された研削液を受ける受け部材４６と、研削液を機外に排出する樋状の排出部材５０と、一端が受け部材４６に接続するとともに他端が排出部材５０に接続して、受け部材４６側から排出部材５０側に向けて研削液を流通させる複数の樋状の接続部材５１とから構成される。 The discharging mechanism 45 includes a receiving member 46 that receives the grinding fluid supplied to the contact portion between the grinding wheel 20 and the workpiece W, a bowl-shaped discharging member 50 that discharges the grinding fluid to the outside of the machine, and one end receiving member 46. And the other end is connected to the discharging member 50, and a plurality of bowl-shaped connecting members 51 for circulating the grinding fluid from the receiving member 46 side toward the discharging member 50 side.

前記受け部材４６は、上部が開口し、平面視コの字状に形成されており、砥石車２０とワークＷとの接触部よりも下方でスイベル台２６の周縁部に固設されて、ベッド１１の開口部１６及び砥石台２２の凹部２２ａに、その一部分が収容された状態で且つ開口部１６及び凹部２２ａの内面との間に隙間が形成されるように配置される。 The receiving member 46 is open at the top and is formed in a U-shape in plan view. The receiving member 46 is fixed to the periphery of the swivel base 26 below the contact portion between the grinding wheel 20 and the workpiece W, 11 and the recessed portion 22a of the grindstone base 22 are arranged so that a gap is formed between the opening 16 and the inner surface of the recessed portion 22a in a state where a part thereof is accommodated.

また、受け部材４６は、スイベル台２６の砥石台２２側の端部であり且つ砥石車２０の下方に設定された第１受け部４７と、スイベル台２６の幅方向両側にそれぞれ設定された第２受け部４８及び第３受け部４９とを備えており、各受け部４７，４８，４９には、接続部材５１側に研削液を流下させるための複数の排出穴４７ａ，４８ａ，４９ａが形成される。また、各受け部４７，４８，４９は、排出穴４７ａ，４８ａ，４９ａ部分の高さが最も低くなるように底面が傾斜している。尚、砥石台２２の凹部２２ａには、第１受け部４７が配置される。 The receiving member 46 is an end portion of the swivel base 26 on the side of the grinding wheel base 22 and a first receiving part 47 set below the grinding wheel 20 and a first receiving part 47 set on both sides in the width direction of the swivel base 26. 2 and a third receiving portion 49, each receiving portion 47, 48, 49 is formed with a plurality of discharge holes 47a, 48a, 49a for allowing the grinding fluid to flow down to the connecting member 51 side. Is done. Each receiving portion 47, 48, 49 is inclined at the bottom so that the height of the discharge holes 47a, 48a, 49a is the lowest. A first receiving portion 47 is disposed in the recess 22 a of the grindstone base 22.

前記第１受け部４７の上部には、外側に張り出したフランジ４７ｂが形成され、前記砥石台２２の凹部２２ａの内面下部には、弾性体からなるシール部材５５が設けられており、このシール部材５５は、その下端が前記フランジ４７ｂの上面に当接している。 A flange 47b projecting outward is formed in the upper part of the first receiving part 47, and a seal member 55 made of an elastic body is provided in the lower part of the inner surface of the recess 22a of the grindstone base 22, and this seal member The lower end of 55 is in contact with the upper surface of the flange 47b.

前記排出部材５０は、ベッド１１の一端側且つ前記部屋１４内に、受け部材４６よりも低い高さ位置で長手方向がベッド１１の幅方向に沿うように且つベッド１１の幅方向の一方の側面から研削液流動方向下流側の端部が突出して貯留タンク３２に接続するように配置される。この排出部材５０は、研削液流動方向下流側の端部底面が上流側の端部底面よりも高さが低くなるように傾斜し、更に、接続部材５１の他端がそれぞれ接続される複数の開口部５０ａを側面に備えている。尚、排出部材５０は、その下面に形成された複数の脚部５０ｂを介して前記部屋１４内に設置されている。また、この脚部５０ｂを直接ベッド１１と接触させても良いが、断熱部材を介してベッド１１と接触させるようにしても良い。 The discharge member 50 is located at one end side of the bed 11 and in the room 14 at a height position lower than the receiving member 46 so that the longitudinal direction is along the width direction of the bed 11 and one side surface in the width direction of the bed 11. Is arranged so that the end on the downstream side in the direction of flow of the grinding fluid protrudes and is connected to the storage tank 32. The discharge member 50 is inclined such that the bottom surface at the downstream side in the grinding fluid flow direction has a lower height than the bottom surface at the upstream side, and the other end of the connection member 51 is connected to each other. An opening 50a is provided on the side surface. The discharge member 50 is installed in the room 14 via a plurality of legs 50b formed on the lower surface thereof. Moreover, although this leg part 50b may be made to contact the bed 11 directly, you may make it contact the bed 11 via a heat insulation member.

前記接続部材５１は、前記部屋１３内に長手方向がベッド１１の長手方向に沿うように且つ一端側が各受け部４７，４８，４９の排出穴４７ａ，４８ａ，４９ａの下方に位置するように配置され、他端側が一端側よりも高さが低くなるように傾斜し、他端側が排出部材５０の側面に固設される。尚、接続部材５１は、その下面に形成された複数の脚部５１ａを介して前記部屋１３内に設置されている。また、この脚部５１ａを直接ベッド１１と接触させても良いが、断熱部材を介してベッド１１と接触させるようにしても良い。 The connecting member 51 is arranged in the room 13 so that the longitudinal direction thereof is along the longitudinal direction of the bed 11 and one end side thereof is located below the discharge holes 47a, 48a, 49a of the receiving portions 47, 48, 49. The other end side is inclined so that the height is lower than the one end side, and the other end side is fixed to the side surface of the discharge member 50. The connecting member 51 is installed in the room 13 through a plurality of leg portions 51a formed on the lower surface thereof. Moreover, although this leg part 51a may be made to contact the bed 11 directly, you may make it contact the bed 11 via a heat insulation member.

尚、センタレス研削盤１は、砥石車２０とワークＷとの接触部に供給された研削液を受け部材４６側に案内するための、図示しないカバーや案内部材を更に備えている。 The centerless grinding machine 1 further includes a cover and a guide member (not shown) for guiding the grinding fluid supplied to the contact portion between the grinding wheel 20 and the workpiece W to the member 46 side.

以上のように構成された本例のセンタレス研削盤１によれば、駆動機構（図示せず）を駆動して、砥石車２０と支持刃２３及び調整車２１との位置関係が予め設定された状態となるように、下送り台２７及び上送り台２８をそれぞれ移動させ、この後、砥石車２０，調整車２１間にワークＷを導入してこれを研削加工する（図７参照）。 According to the centerless grinding machine 1 of the present example configured as described above, a drive mechanism (not shown) is driven, and the positional relationship between the grinding wheel 20, the support blade 23, and the adjustment wheel 21 is set in advance. The lower feed table 27 and the upper feed table 28 are respectively moved so as to be in a state, and then the workpiece W is introduced between the grinding wheel 20 and the adjustment wheel 21 and is ground (see FIG. 7).

研削加工の際には、貯留タンク３２内に貯留された研削液が供給ポンプ３３によりノズル体３０に供給され、このノズル体３０から砥石車２０とワークＷとの接触部に向けて吐出されるが、この吐出された研削液は、その後、受け部材４６（各受け部４７，４８，４９）内に流入してその排出穴４７ａ，４８ａ，４９ａから下方の接続部材５１内に流下，排出される。接続部材５１側に流下した研削液は、この接続部材５１内を流通して排出部材５０側にその開口部５０ａから流入し、この後、排出部材５０内を流通して貯留タンク３２に還流される。 At the time of grinding, the grinding liquid stored in the storage tank 32 is supplied to the nozzle body 30 by the supply pump 33 and discharged from the nozzle body 30 toward the contact portion between the grinding wheel 20 and the workpiece W. However, the discharged grinding liquid then flows into the receiving member 46 (respective receiving portions 47, 48, 49), flows down from the discharge holes 47a, 48a, 49a into the lower connecting member 51 and is discharged. The The grinding fluid flowing down to the connecting member 51 flows through the connecting member 51 and flows into the discharge member 50 from the opening 50a, and then flows through the discharge member 50 and is returned to the storage tank 32. The

このようにして、ノズル体３０から吐出された研削液は、受け部材４６，接続部材５１及び排出部材５０を順次通って貯留タンク３２内に回収される。砥石車２０とワークＷとの接触部に供給された研削液は温度上昇するものの、受け部材４６に複数の受け部４７，４８，４９を設定し、更に、これらの各受け部４７，４８，４９と排出部材５０とを複数の接続部材５１によりそれぞれ接続したので、受け部材４６内の研削液が速やかに排出部材５０側に流動して機外（貯留タンク３２）に排出される。 In this manner, the grinding liquid discharged from the nozzle body 30 is collected in the storage tank 32 through the receiving member 46, the connecting member 51, and the discharging member 50 in order. Although the temperature of the grinding fluid supplied to the contact portion between the grinding wheel 20 and the workpiece W rises, a plurality of receiving portions 47, 48, 49 are set on the receiving member 46, and each of these receiving portions 47, 48, 49 and the discharge member 50 are connected to each other by the plurality of connection members 51, so that the grinding fluid in the receiving member 46 quickly flows to the discharge member 50 side and is discharged to the outside of the machine (storage tank 32).

また、受け部材４６は、スイベル台２６に固設されてベッド１１と接触しておらず、排出部材５０及び接続部材５１は、脚部５０ｂ，５１ａによりベッド１１の各部屋１３，１４内に設置されてベッド１１と接触する領域が小さいので、研削液や切りくずの熱がベッド１１に伝達され難い。 The receiving member 46 is fixed to the swivel base 26 and is not in contact with the bed 11, and the discharge member 50 and the connecting member 51 are installed in the rooms 13 and 14 of the bed 11 by the leg portions 50 b and 51 a. Since the area in contact with the bed 11 is small, the heat of the grinding fluid and chips is difficult to be transmitted to the bed 11.

また、砥石台２２の凹部２２ａに設けられたシール部材５５の下端が第１受け部４７のフランジ４７ｂの上面に当接しているので、第１受け部４７内に流入する研削液が、第１受け部４７と砥石台２２やベッド１１との間の隙間に侵入するのが防止される。 Further, since the lower end of the seal member 55 provided in the recess 22a of the grindstone base 22 is in contact with the upper surface of the flange 47b of the first receiving portion 47, the grinding fluid flowing into the first receiving portion 47 is the first. Intrusion into the gap between the receiving portion 47 and the grinding wheel base 22 or the bed 11 is prevented.

このように、本例のセンタレス研削盤１によれば、温度上昇した研削液を速やかに排出方向下流側に流動させ、研削液が受け部材４６内に滞留したり、切りくずが受け部材４６内に堆積するのを防止することができるので、研削液や切りくずの熱がベッド１１や調整車台２５に伝達して熱変形するのを防止し、精度良くワークＷに研削加工を施すことができる。 As described above, according to the centerless grinding machine 1 of the present example, the grinding liquid whose temperature has risen is quickly flowed to the downstream side in the discharge direction, so that the grinding liquid stays in the receiving member 46 or chips are generated in the receiving member 46 Therefore, it is possible to prevent the grinding fluid and chip heat from being transmitted to the bed 11 and the adjustment chassis 25 and to be thermally deformed, and to accurately grind the workpiece W. .

また、受け部材４６がベッド１１に接触しておらず、また、排出部材５０及び接続部材５１の脚部５０ｂ，５１ａの数や大きさなどを適宜調整して排出部材５０及び接続部材５１がベッド１１と接触する面積を可能な限り小さくすることにより、研削液や切りくずの熱によるベッド１１の変形を抑制することができるので、このことによってもワークＷを高精度に研削加工することができる。 Further, the receiving member 46 is not in contact with the bed 11, and the number and size of the leg portions 50b, 51a of the discharge member 50 and the connection member 51 are adjusted as appropriate so that the discharge member 50 and the connection member 51 are not in bed. Since the deformation of the bed 11 due to the heat of grinding fluid and chips can be suppressed by making the area in contact with 11 as small as possible, the workpiece W can also be ground with high accuracy. .

また、排出部材５０の配置位置がベッド１１の端部であるので、作業者は、段取り作業やメンテナンス作業などを行う際に砥石車２０や砥石台２２、調整車２１や調整車台２５などに接近し易く、作業性を向上させることができる。 Further, since the arrangement position of the discharge member 50 is the end of the bed 11, the operator approaches the grinding wheel 20, the grinding wheel base 22, the adjustment wheel 21, the adjustment wheel base 25, etc. when performing setup work or maintenance work. It is easy to do and can improve workability | operativity.

また、接続部材５１をベッド１１の長手方向に沿うように設けたことにより、ベッド１１をその幅方向に傾斜させる必要がなく、仕切部材１２やリブ１５を、ベッド１１の長手方向と平行であり且つ調整車台２５の幅方向の中央位置を通る鉛直面２５ａを基準にして左右対称となる位置に形成することができ、このように対称配置とすることで、研削液や切りくずの熱によりベッド１１が変形しても、ベッド１１の熱変形状態が不均一になるのを防止して加工精度が悪化するのを防止することができる。また、静剛性を高めることもでき、このことによっても加工精度を良好なものとすることができる。 Further, since the connecting member 51 is provided along the longitudinal direction of the bed 11, it is not necessary to incline the bed 11 in the width direction, and the partition member 12 and the rib 15 are parallel to the longitudinal direction of the bed 11. In addition, it can be formed in a position that is symmetrical with respect to the vertical surface 25a passing through the center position in the width direction of the adjustment chassis 25, and in such a symmetrical arrangement, the bed is generated by the heat of the grinding fluid and chips. Even if 11 is deformed, it is possible to prevent the thermal deformation state of the bed 11 from becoming uneven and prevent the processing accuracy from deteriorating. Further, the static rigidity can be increased, and this also makes it possible to improve the processing accuracy.

以上、本発明の一実施形態について説明したが、本発明の採り得る具体的な態様は、何らこれに限定されるものではない。 As mentioned above, although one Embodiment of this invention was described, the specific aspect which this invention can take is not limited to this at all.

上例では、受け部材４６をスイベル台２６に固設したが、これに限られるものではなく、ベッド１１側に固設するようにしても良い。この場合、受け部材４６を直接ベッド１１に取り付けるのではなく、断熱部材を介して取り付けることが好ましい。 In the above example, the receiving member 46 is fixed to the swivel base 26, but is not limited thereto, and may be fixed to the bed 11 side. In this case, it is preferable that the receiving member 46 is not attached directly to the bed 11 but attached via a heat insulating member.

また、排出部材５０により研削液をベッド１１の幅方向の一方の側面から機外に排出するようにしたが、これに限られるものではなく、排出部材５０の底面の傾斜方向を逆にしてベッド１１の幅方向のもう一方の側面から排出したり、排出部材５０の研削液流動方向下流側の端部をＬ字状に曲げてベッド１１の一端側の側面から排出するようにしても良い。このようにして研削液を排出する側面を変更することで、当該センタレス研削盤１のレイアウトをフレキシブルに行うことができる。 Further, the grinding liquid is discharged from the one side surface in the width direction of the bed 11 by the discharge member 50. However, the present invention is not limited to this, and the bed is made with the inclination direction of the bottom surface of the discharge member 50 reversed. 11 may be discharged from the other side surface in the width direction, or may be discharged from the side surface on the one end side of the bed 11 by bending the end portion of the discharge member 50 on the downstream side in the grinding fluid flow direction into an L shape. Thus, the layout of the centerless grinding machine 1 can be flexibly performed by changing the side surface from which the grinding liquid is discharged.

本発明の一実施形態に係るセンタレス研削盤の概略構成を示した平面図である。It is a top view showing a schematic structure of a centerless grinding machine concerning one embodiment of the present invention. 図１における矢示Ａ−Ａ方向の断面図である。It is sectional drawing of the arrow AA direction in FIG. 図１における矢示Ｂ−Ｂ方向の断面図である。It is sectional drawing of the arrow BB direction in FIG. 本実施形態に係る排出機構の概略構成などを示した平断面図である。It is the plane sectional view showing the schematic structure etc. of the discharge mechanism concerning this embodiment. 図４における矢示Ｃ−Ｃ方向の断面図である。It is sectional drawing of the arrow CC direction in FIG. 図４における矢示Ｄ−Ｄ方向の断面図である。It is sectional drawing of the arrow DD direction in FIG. 本実施形態に係る調整車台の移動について説明した断面図である。It is sectional drawing explaining the movement of the adjustment chassis which concerns on this embodiment. 従来例に係る排出機構などの概略構成を示した平断面図である。It is the plane sectional view which showed schematic structure, such as the discharge mechanism concerning a prior art example. 図８における矢示Ｅ−Ｅ方向の断面図である。It is sectional drawing of the arrow EE direction in FIG.

符号の説明Explanation of symbols

１センタレス研削盤
１１ベッド
２０砥石車
２１調整車
２２砥石台
２３支持刃
２５調整車台
２６スイベル台
２７下送り台
２８上送り台
３０ノズル体
３１供給機構
４５排出機構
４６受け部材
４７第１受け部
４８第２受け部
４９第３受け部
５０排出部材
５１接続部材
Ｗワーク DESCRIPTION OF SYMBOLS 1 Centerless grinding machine 11 Bed 20 Grinding wheel 21 Adjustment wheel 22 Grinding wheel base 23 Support blade 25 Adjustment wheel base 26 Swivel base 27 Lower feed stand 28 Upper feed stand 30 Nozzle body 31 Supply mechanism 45 Discharge mechanism 46 Receiving member 47 1st receiving part 48 Second receiving part 49 Third receiving part 50 Discharge member 51 Connection member W Workpiece

Claims

内部が中空に形成されたベッドと、外周面が相互に対向するように配設された砥石車及び調整車と、前記ベッド上に配設され、前記砥石車を水平な軸線中心に回転自在に支持する砥石台と、前記ベッド上に配設され、前記調整車を軸線中心に回転自在に支持する調整車台と、前記砥石車と調整車との間に配設され、これらの間でワークを支持する支持刃と、前記砥石車とワークとの接触部に向けて研削液を吐出する吐出手段と、前記吐出手段に研削液を供給して吐出させる供給手段と、前記砥石車とワークとの接触部に供給された研削液を導いて機外に排出する排出手段とを備えたセンタレス研削盤であって、
前記排出手段は、前記砥石車とワークとの接触部に供給された研削液を受ける受け部材と、研削液を機外に排出する樋状の排出部材と、一端が前記受け部材に接続するとともに他端が前記排出部材に接続して、前記受け部材側から前記排出部材側に向けて研削液を流通させる複数の樋状の接続部材とから構成され、
前記ベッドの上面には、前記内部空間に連通し、前記受け部材の少なくとも一部が収容される開口部が形成されてなり、
前記受け部材は、上部が開口し、前記砥石車とワークとの接触部よりも下方で前記調整車台の周縁部に配置されるように且つ少なくとも一部が前記ベッドの開口部内に収容されるように前記ベッド又は調整車台に設けられ、前記排出部材は、前記ベッドの前記砥石台側の端部且つ前記ベッドの内部空間に前記受け部材よりも低い高さ位置で長手方向が前記砥石車の軸線方向に沿うように配置され、前記各接続部材は、前記ベッドの内部空間に長手方向が前記砥石車及び調整車の対向方向に沿うように配置されてなることを特徴とするセンタレス研削盤。 A bed with a hollow interior, a grinding wheel and an adjustment wheel arranged so that the outer peripheral surfaces face each other, and a wheel arranged on the bed so that the grinding wheel can rotate about a horizontal axis A grinding wheel support, an adjustment wheel arranged on the bed and rotatably supporting the adjustment wheel about its axis, and a wheel between the grinding wheel and the adjustment wheel. A supporting blade for supporting, a discharging means for discharging a grinding liquid toward a contact portion between the grinding wheel and the work, a supplying means for supplying the grinding liquid to the discharging means for discharging, and the grinding wheel and the work A centerless grinding machine provided with discharging means for guiding the grinding fluid supplied to the contact portion and discharging it outside the machine,
The discharging means includes a receiving member that receives the grinding fluid supplied to the contact portion between the grinding wheel and the workpiece, a bowl-shaped discharging member that discharges the grinding fluid to the outside of the machine, and one end connected to the receiving member. The other end is connected to the discharge member, and is composed of a plurality of bowl-shaped connection members that circulate the grinding fluid from the receiving member side toward the discharge member side,
On the upper surface of the bed, an opening that communicates with the internal space and accommodates at least a part of the receiving member is formed.
The receiving member is open at the top, and is disposed at the periphery of the adjustment carriage below the contact portion between the grinding wheel and the workpiece, and at least a part thereof is accommodated in the opening of the bed. Provided on the bed or the adjustment carriage, and the discharge member has an end on the grinding wheel base side of the bed and an inner space of the bed at a height position lower than the receiving member and the longitudinal direction is the axis of the grinding wheel A centerless grinding machine, wherein the connecting members are arranged along a direction, and the connecting members are arranged in an internal space of the bed so that a longitudinal direction thereof is along a facing direction of the grinding wheel and the adjusting wheel.

前記受け部材は、研削液を受けるための複数の受け部を備え、
前記各接続部材は、前記各受け部と前記排出部材とをそれぞれ接続するように構成されてなることを特徴とする請求項１記載のセンタレス研削盤。 The receiving member includes a plurality of receiving portions for receiving a grinding fluid,
The centerless grinding machine according to claim 1, wherein each connection member is configured to connect each receiving portion and the discharge member.

前記ベッドの内部空間には、前記砥石車及び調整車の対向方向と平行な鉛直面を基準にして左右対称となる位置に複数のリブ又は仕切部材が前記対向方向に沿って形成されてなることを特徴とする請求項１又は２記載のセンタレス研削盤。 In the internal space of the bed, a plurality of ribs or partition members are formed along the facing direction at positions that are symmetric with respect to a vertical plane parallel to the facing direction of the grinding wheel and the adjustment wheel. The centerless grinding machine according to claim 1 or 2, characterized by the above-mentioned.

前記接続部材及び排出部材は、これらの下面に形成された複数の脚部を備え、これらの脚部を介して前記ベッドの内部空間に設置されてなることを特徴とする請求項１乃至３記載のいずれかのセンタレス研削盤。 The said connection member and discharge member are provided with the some leg part formed in these lower surfaces, and are installed in the internal space of the said bed through these leg parts, The Claims 1 thru | or 3 characterized by the above-mentioned. One of the centerless grinding machines.