JP7236361B2 - Grinding wheel cover device for internal grinder - Google Patents
Grinding wheel cover device for internal grinder Download PDFInfo
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- JP7236361B2 JP7236361B2 JP2019168220A JP2019168220A JP7236361B2 JP 7236361 B2 JP7236361 B2 JP 7236361B2 JP 2019168220 A JP2019168220 A JP 2019168220A JP 2019168220 A JP2019168220 A JP 2019168220A JP 7236361 B2 JP7236361 B2 JP 7236361B2
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Description
この発明は、内面研削盤における砥石カバー装置に関し、特に、段取り換えを行う際の作業者を保護する内面研削盤用砥石カバー装置に関する。 TECHNICAL FIELD The present invention relates to a grindstone cover device for an internal grinder, and more particularly to a grindstone cover device for an internal grinder that protects an operator during setup change.
内面研削盤には、特許文献１に示されているように、砥石を被覆するカバー位置と砥石を露出させる非カバー位置との間で移動させられる砥石カバーが設けられている。このような研削盤では、砥石カバーを非カバー位置に移動させた状態で研削を行い、研削終了時には、回転を続ける砥石をカバー位置に移動させた砥石カバーで覆い、段取り換えを行う作業者が砥石に接触することを防ぐようになっている。 An internal grinder is provided with a whetstone cover that can be moved between a cover position that covers the whetstone and an uncovered position that exposes the whetstone, as disclosed in Japanese Patent Application Laid-Open No. 2002-200000. In such a grinder, grinding is performed with the whetstone cover moved to the non-cover position, and at the end of grinding, the whetstone that continues to rotate is covered with the whetstone cover moved to the cover position. It is designed to prevent contact with the grindstone.
従来の内面研削盤用砥石カバー装置の一例を図４および図５に示す。 An example of a conventional grindstone cover device for an internal grinder is shown in FIGS. 4 and 5. FIG.
内面研削盤(1)は、図４に示すように、ワーク(W)を保持する主軸台(2)と、主軸台(2)に対向するように配置されて砥石(6)を回転させる内面研削軸(5)と、主軸台(2)および内面研削軸(5)を覆う全体カバー(7)と、全体カバー(7)に設けられた作業者出入り用の開口(7a)を開閉するドア(8)と、砥石(6)を覆う砥石カバー装置(30)とを備えている。 As shown in FIG. 4, the internal grinding machine (1) has a headstock (2) that holds a work (W), and an inner surface that rotates a grinding wheel (6) arranged to face the headstock (2). An overall cover (7) that covers the grinding spindle (5), the headstock (2) and the internal grinding spindle (5), and a door that opens and closes an opening (7a) provided in the overall cover (7) for the operator to enter and exit. (8) and a whetstone cover device (30) for covering the whetstone (6).
砥石カバー装置(30)は、砥石(6)とともに砥石軸方向に移動させられる砥石カバー(31)と、砥石カバー(31)が砥石(6)を被覆するカバー位置と砥石(6)を露出させる非カバー位置の間で砥石カバー(31)を旋回させる砥石カバー旋回装置(32)とを備えている。 The whetstone cover device (30) includes a whetstone cover (31) that is moved in the whetstone axial direction together with the whetstone (6), and a cover position where the whetstone cover (31) covers the whetstone (6) and exposes the whetstone (6). and a wheel cover turning device (32) for turning the wheel cover (31) between non-covered positions.
図５（ｂ）に示すように、カバー位置にある砥石カバー(31)は、砥石(6)の前方を覆う前壁(33)と、砥石(6)の上方を覆う上壁(34)と、砥石(6)の作業者出入り用の開口(7a)に近い側方を覆う左壁(35)とを有している。 As shown in FIG. 5(b), the whetstone cover (31) at the cover position comprises a front wall (33) covering the front of the whetstone (6) and an upper wall (34) covering the upper side of the whetstone (6). , and a left wall (35) covering the side of the grindstone (6) near the opening (7a) for the operator to enter and exit.
砥石カバー(31)は、砥石カバー旋回装置(32)の旋回アーム(32a)を旋回させることによって、図５（ａ）に示す非カバー位置と図５（ｂ）に示すカバー位置との間で移動させられる。 The grindstone cover (31) is moved between the non-covered position shown in FIG. 5(a) and the covered position shown in FIG. 5(b) by rotating the rotating arm (32a) of the grindstone cover rotating device (32). be moved.
図４および図５に示す砥石カバー(31)は、ドア(8)を開いて段取り作業空間(S)に入った作業者が砥石(6)に接触することを防止するために設置されているもので、砥石(6)が破損したときに、砥石(6)の飛散を防ぐようにはなっていない。したがって、加工中の破損による砥石(6)の飛散は、全体カバー(7)によって防ぐことができるものの、段取り換え中の破損による砥石(6)の飛散を防ぐことはできない。そのため、砥石の回転を安全な回転数に落としてから段取り換えを行う必要があり、砥石の回転数を落とすには時間がかかるため、部品の製作時間の増大につながるという問題があった。 The whetstone cover (31) shown in FIGS. 4 and 5 is installed to prevent the operator who has opened the door (8) and entered the setup work space (S) from coming into contact with the whetstone (6). However, when the grindstone (6) breaks, it is not designed to prevent the grindstone (6) from scattering. Therefore, although the whole cover (7) can prevent the grindstone (6) from scattering due to breakage during processing, it cannot prevent the grindstone (6) from scattering due to breakage during setup change. For this reason, it is necessary to reduce the rotation speed of the grindstone to a safe rotation speed before performing a setup change, and since it takes time to reduce the rotation speed of the grindstone, there is a problem that it leads to an increase in the production time of parts.
この発明の目的は、段取り換え中の破損による砥石の飛散を防ぐことができる内面研削盤用砥石カバー装置を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a grindstone cover device for an internal grinder that can prevent the grindstone from scattering due to breakage during setup change.
この発明による内面研削盤用砥石カバー装置は、ワークを保持する主軸を支持する主軸台と、主軸台に対向するように配置されてワークの内面を研削する砥石を回転させる内面研削軸と、主軸台および内面研削軸を覆う全体カバーとを備えている内面研削盤に設けられて、砥石を覆う砥石カバー装置であって、主軸台と内面研削軸との間を仕切る固定カバーと、固定カバーに設けられた内面研削軸の進退を可能とする開口を開閉可能とする可動カバーと、可動カバーを開位置と閉位置とに移動させる移動装置とを備えていることを特徴とするものである。 A grindstone cover device for an internal grinder according to the present invention comprises a headstock that supports a spindle that holds a work, an internal grinding shaft that is arranged to face the headstock and rotates a grindstone that grinds the inner surface of the work, and a spindle. A grinding wheel cover device provided in an internal grinding machine comprising a base and an overall cover covering the internal grinding shaft to cover the grinding wheel, the fixed cover partitioning between the headstock and the internal grinding shaft, and the fixed cover. The apparatus is characterized by comprising a movable cover capable of opening and closing an opening that allows forward and backward movement of the provided internal grinding shaft, and a moving device for moving the movable cover between an open position and a closed position.
この発明の内面研削盤用砥石カバー装置によると、可動カバーを開位置にすることで、固定カバーに設けられた開口からの内面研削軸の進退が可能となるので、この状態で、内面研削軸を進退させることにより、砥石によるワークの内面研削を行うことができる。そして、研削終了時には、固定カバーに設けられた開口から内面研削軸を後退させ、さらに、可動カバーを閉位置にすることにより、作業者が段取り換えを行う空間と砥石とが固定カバーおよび可動カバーによって隔てられる。したがって、高速回転する砥石が破損した場合であっても、砥石の飛散を防ぐことができる。 According to the grindstone cover device for an internal grinder of the present invention, by opening the movable cover, the internal grinding shaft can be advanced and retracted through the opening provided in the fixed cover. The inner surface of the workpiece can be ground by the grindstone by advancing and retracting the . At the end of grinding, the inner surface grinding shaft is retracted from the opening provided in the fixed cover, and the movable cover is closed, so that the space where the operator changes setup and the grinding wheel are separated from each other by the fixed cover and the movable cover. separated by Therefore, even if the grindstone rotating at high speed is damaged, the grindstone can be prevented from scattering.
この発明の内面研削盤用砥石カバー装置によれば、可動カバーを開位置にすることで、砥石によるワークの内面研削を行うことができ、研削終了時には、可動カバーを閉位置にすることで、作業者が段取り換えを行う空間と砥石とが固定カバーおよび可動カバーによって隔てられる。したがって、高速回転する砥石が破損した場合であっても、砥石の飛散を防ぐことができ、段取り換えを行うために砥石の回転数を落とす必要がなくなり、部品の製作時間を短縮することができる。 According to the whetstone cover device for an internal grinder of the present invention, the inner surface of the workpiece can be ground by the whetstone by opening the movable cover. A fixed cover and a movable cover separate the space in which the operator changes the setup from the grindstone. Therefore, even if the grindstone that rotates at high speed is damaged, the grindstone can be prevented from scattering, and it is no longer necessary to reduce the rotation speed of the grindstone to change the setup, and the production time of parts can be shortened. .
以下、図１から図３までを参照して、この発明の内面研削盤用砥石カバー装置の実施形態について説明する。以下の説明において、図１の左側を前、同右側を後といい、左右については、後から前を見た場合の左右をいうものとする。 1 to 3, an embodiment of a grindstone cover device for an internal grinder according to the present invention will be described below. In the following description, the left side of FIG. 1 is called the front, the right side of FIG.
内面研削盤(1)は、図１に示すように、前後方向に延びる主軸(3)を支持する主軸台(2)と、主軸(3)の先端部に設けられてワーク(W)を保持するチャック(4)と、前後方向に延びる軸を有し、主軸台(2)に対向するように配置された内面研削軸(5)と、内面研削軸(5)に回転可能に支持されてワーク(W)の内面を研削する砥石(6)と、主軸台(2)および内面研削軸(5)を覆う全体カバー(7)と、全体カバー(7)に設けられた作業者出入り用の開口(7a)を開閉するドア(8)と、砥石(6)を覆うことができる内面研削盤用砥石カバー装置(9)とを備えている。 As shown in FIG. 1, the internal grinder (1) includes a headstock (2) that supports a spindle (3) extending in the front-rear direction, and a work (W) that is provided at the tip of the spindle (3). an internal grinding shaft (5) having a longitudinally extending shaft and facing the headstock (2); A grindstone (6) that grinds the inner surface of the workpiece (W), an overall cover (7) that covers the headstock (2) and the internal grinding shaft (5), and a worker access door provided on the overall cover (7). It is provided with a door (8) for opening and closing the opening (7a) and a grindstone cover device (9) for an internal grinder capable of covering the grindstone (6).
内面研削が行われている間、ドア(8)は閉じられており、内面研削が終了すると、作業者は、ドア(8)を開いて、段取り作業空間(S)に入り、ワーク(W)の取出しや装着などを行う。砥石カバー装置(9)は、段取り作業空間(S)において段取り換えを行う作業者を回転する砥石(6)から保護する。 The door (8) is closed while the internal grinding is being performed, and when the internal grinding is completed, the worker opens the door (8), enters the setup work space (S), and moves the workpiece (W). Remove and install the . The whetstone cover device (9) protects the operator who performs setup change in the setup work space (S) from the rotating whetstone (6).
砥石カバー装置(9)は、主軸台(2)と内面研削軸(5)との間を仕切る固定カバー(10)と、上下移動可能なように固定カバー(10)に取り付けられた可動カバー(11)と、可動カバー(11)を開位置と閉位置とに移動させる移動装置(12)とを備えている。 The grinding wheel cover device (9) consists of a fixed cover (10) partitioning between the headstock (2) and the internal grinding spindle (5), and a movable cover (10) attached to the fixed cover (10) so as to be vertically movable. 11) and a moving device (12) for moving the movable cover (11) between the open position and the closed position.
固定カバー(10)は、左右両端が全体カバー(7)に固定されており、その左右の中央部の下側には、図２に示すように、内面研削軸(5)の進退を可能とする開口(10a)が設けられている。可動カバー(11)は、図２（ａ）に示す開口(10a)を開放する上位置と、図２（ｂ）に示す開口(10a)を閉鎖する下位置との間を移動可能とされている。 The left and right ends of the fixed cover (10) are fixed to the overall cover (7), and as shown in FIG. An opening (10a) is provided. The movable cover (11) is movable between an upper position for opening the opening (10a) shown in FIG. 2(a) and a lower position for closing the opening (10a) shown in FIG. 2(b). there is
可動カバー(11)は、前壁(13)、上壁(14)および左右壁(15)を有しており、左右壁(15)には、左右壁(15)に対して９０°外側に折り曲げられた左右縁部(15a)が設けられている。左右壁(15)は、その後部が固定カバー(10)に設けられたガイド溝(16)に挿通され、左右縁部(15a)が後側から固定カバー(10)に間隙をおいて対向させられている。 The movable cover (11) has a front wall (13), a top wall (14) and left and right walls (15). Bent left and right edges (15a) are provided. The rear portions of the left and right walls (15) are inserted into guide grooves (16) provided in the fixed cover (10), and the left and right edges (15a) face the fixed cover (10) from the rear with a gap therebetween. It is
移動装置(12)は、固定カバー(10)の可動カバー(11)の左右縁部(15a)に対向する面に固定された上下に延びる左右のガイドレール(17)と、可動カバー(11)の左右縁部(15a)の固定カバー(10)に対向する面に固定されてガイドレール(17)に嵌め合わされた左右の上下１対のガイドブロック(18)と、固定カバー(10)の右端部に取り付けられて可動カバー(11)の右縁部(15a)下端部に固定されたブラケット(20)を上下移動させる流体圧シリンダ(19)とを備えている。 The moving device (12) includes vertically extending left and right guide rails (17) fixed to surfaces of the fixed cover (10) facing the left and right edges (15a) of the movable cover (11), and the movable cover (11). A pair of left and right upper and lower guide blocks (18) fixed to the surfaces facing the fixed cover (10) of the left and right edges (15a) of the housing and fitted to the guide rail (17), and the right end of the fixed cover (10) and a fluid pressure cylinder (19) for moving up and down a bracket (20) fixed to the lower end of the right edge (15a) of the movable cover (11).
流体圧シリンダ(19)によると、下方にのびるピストン(19a)の下端部がブラケット(20)に固定されており、ピストン(19a)を上方に移動させることにより、ブラケット(20)を介して可動カバー(11)を上位置（すなわち、開位置）と下位置（すなわち、閉位置）とに移動させることができる。 According to the fluid pressure cylinder (19), the lower end of the downwardly extending piston (19a) is fixed to the bracket (20), and by moving the piston (19a) upward, the piston (19a) is movable through the bracket (20). The cover (11) can be moved between an upper position (ie open position) and a lower position (ie closed position).
固定カバー(10)および可動カバー(11)は、全体カバー(7)と同程度の強度を有する材料（例えば、ステンレス鋼などの金属）で形成される。したがって、可動カバー(11)が閉位置にある場合、作業者が段取り換えを行う段取り作業空間(S)は、強固なカバー(10)(11)によって、内面研削軸(5)が配置されている空間と分断される。 The fixed cover (10) and the movable cover (11) are made of a material (for example, metal such as stainless steel) having strength comparable to that of the overall cover (7). Therefore, when the movable cover (11) is in the closed position, the internal grinding shaft (5) is arranged by the strong covers (10) and (11) in the setup work space (S) where the operator changes setups. It is separated from the space in which it is.
上記の内面研削盤用砥石カバー装置(9)によると、図２（ａ）に示すように、可動カバー(11)が開位置にある場合、固定カバー(10)に設けられた開口(10a)を通過させて、図１に二点鎖線で示す位置まで内面研削軸(5)を前進させることにより、砥石(6)によるワーク(W)の内面研削を行うことができる。 According to the above grindstone cover device (9) for an internal grinder, when the movable cover (11) is in the open position as shown in FIG. , and the inner surface grinding shaft (5) is advanced to the position indicated by the two-dot chain line in FIG.
そして、研削終了時には、固定カバー(10)に設けられた開口(10a)を通過させて、図１に実線で示す位置まで内面研削軸(5)を後退させるとともに、可動カバー(11)を図２（ｂ）に示す閉位置に移動させる。これにより、段取り作業空間(S)と砥石(6)とは、固定カバー(10)および可動カバー(11)によって隔てられる。したがって、高速回転する砥石(6)が破損した場合であっても、砥石(6)の飛散を防ぐことができ、段取り換えを行うために砥石(6)の回転数を落とす必要がなくなり、部品の製作時間を短縮することができる。 At the end of grinding, the inner surface grinding shaft (5) is retracted to the position indicated by the solid line in FIG. 2(b) to the closed position. Thus, the setup work space (S) and the grindstone (6) are separated by the fixed cover (10) and the movable cover (11). Therefore, even if the grindstone (6) rotating at a high speed is damaged, the grindstone (6) can be prevented from scattering, eliminating the need to reduce the rotation speed of the grindstone (6) for changeover, thereby reducing the number of parts. production time can be shortened.
(1)：内面研削盤
(2)：主軸台
(3)：主軸
(5)：内面研削軸
(6)：砥石
(7)：全体カバー
(9)：内面研削盤用砥石カバー装置
(10)：固定カバー
(10a)：開口
(11)：可動カバー
(12)：移動装置
(17)：ガイドレール
(18)：ガイドブロック
(19)：流体圧シリンダ
(W)：ワーク
(1): Internal grinding machine
(2): headstock
(3): Spindle
(5): Internal ground shaft
(6): Whetstone
(7): Whole cover
(9): Whetstone cover device for internal grinder
(10): Fixed cover
(10a): Aperture
(11): movable cover
(12): mobile device
(17): Guide rail
(18): Guide block
(19): Fluid pressure cylinder
(W): Work
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| JP2019168220A JP7236361B2 (en) | 2019-09-17 | 2019-09-17 | Grinding wheel cover device for internal grinder |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007276032A (en) | 2006-04-05 | 2007-10-25 | Okuma Corp | Grinding machine |
| JP5909148B2 (en) | 2012-05-09 | 2016-04-26 | ミクロン精密株式会社 | Internal grinding machine and internal grinding method |
| JP6292143B2 (en) | 2015-02-10 | 2018-03-14 | トヨタ自動車株式会社 | vehicle |
| JP6481067B1 (en) | 2018-05-16 | 2019-03-13 | 株式会社滝澤鉄工所 | Machine tool with workpiece transfer mechanism |
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| JPS617872Y2 (en) * | 1981-05-27 | 1986-03-11 | ||
| JPH0236676Y2 (en) * | 1985-11-30 | 1990-10-04 | ||
| JP5654826B2 (en) * | 2010-10-06 | 2015-01-14 | 株式会社ディスコ | Cutting device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007276032A (en) | 2006-04-05 | 2007-10-25 | Okuma Corp | Grinding machine |
| JP5909148B2 (en) | 2012-05-09 | 2016-04-26 | ミクロン精密株式会社 | Internal grinding machine and internal grinding method |
| JP6292143B2 (en) | 2015-02-10 | 2018-03-14 | トヨタ自動車株式会社 | vehicle |
| JP6481067B1 (en) | 2018-05-16 | 2019-03-13 | 株式会社滝澤鉄工所 | Machine tool with workpiece transfer mechanism |
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