JPH02224964A - Grinding device for eddylike groove to curved face of shade part of engine valve - Google Patents
Grinding device for eddylike groove to curved face of shade part of engine valveInfo
- Publication number
- JPH02224964A JPH02224964A JP4532989A JP4532989A JPH02224964A JP H02224964 A JPH02224964 A JP H02224964A JP 4532989 A JP4532989 A JP 4532989A JP 4532989 A JP4532989 A JP 4532989A JP H02224964 A JPH02224964 A JP H02224964A
- Authority
- JP
- Japan
- Prior art keywords
- engine valve
- bed
- arm
- grinder
- curved face
- 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
- 230000005477 standard model Effects 0.000 claims abstract description 13
- 230000005284 excitation Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、エンジンバルブにおける傘部の裏面たる湾曲
面に、多数の微細な渦状溝を自動的に研削して形成する
装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for automatically grinding and forming a large number of fine spiral grooves on the curved surface of the back surface of the umbrella portion of an engine valve.
吸気用エンジンバルブの傘部の裏面たる湾曲面に、多数
の渦状溝を設けると、混合気が渦流となってシリンダ内
に吸引され、均一な混合気が速やかに形成されて、燃焼
効率が向上することは知られでいる。By providing a large number of spiral grooves on the curved back surface of the umbrella part of the intake engine valve, the air-fuel mixture becomes a vortex and is drawn into the cylinder, quickly forming a uniform air-fuel mixture and improving combustion efficiency. It is known to do so.
エンジンバルブの傘部の湾曲面に、上記目的のための多
数の渦状溝を、研削によって設けることは、湾曲面の曲
率が小である。ため、容易ではなく、特に、その作業の
自動化を計ることは困難である。Providing a large number of spiral grooves for the above purpose on the curved surface of the engine valve head by grinding reduces the curvature of the curved surface. Therefore, it is not easy, and it is especially difficult to automate this work.
因みに従来は、この作業は、無端ベルトグラインダを手
で上下前後左右に移動させることによって行われていた
。Conventionally, this work has been carried out by manually moving the endless belt grinder up, down, back and forth, left and right.
従来のやり方では、作業能率が悪く、かつ均一な製品を
得るためには熟練を要し、また作業者は、装置に付き切
りで、グラインダを操作する必要があるため、肉体的に
も精神的にも疲労し易く、しかも研削の際に発生する粉
塵により、周囲の環境も損われる。Conventional methods have low work efficiency and require skill to obtain uniform products, and workers are physically and mentally challenged as they have to operate the grinder all the time. Grinding also causes fatigue, and the dust generated during grinding also damages the surrounding environment.
本発明によると、水平をなすエンジンバルブの軸部を把
持して回転する把持装置と、不動の基台の要所に、エン
ジンバルブと平行に止着された標準モデルと、基台上を
エンジンバルブの軸線と平行に移動する主ベッ1へと、
主ベッ1く上k、エンジンバルブの傘部に向かって、後
方より斜めに移動可能で、かつ要所に垂直の倣い棒を備
える斜行ベッドと、先端部がエンジンバルブの傘部方向
を向き、かつ基部が、長手方向と直交する水平の枢軸を
もって斜行ベッドに枢支されたアームと、アームをその
枢軸まわりに往復回動させる加振装置と、アームの基部
とその先端部に枢設したプーリに掛け回され、かつモー
タにより回走させられる無端ベルトグラインダと、アー
ムがエンジンバルブ傘部の後端を指向する位置より、傘
部の前端を指向する位置まで、主ベッドを前後に往復移
動させる駆動装置と、無端ベル1−グラインダがエンジ
ンバルブの傘部より後方に離間する待機位置より、傘部
の湾曲面の後端に圧接する研削位置まで、斜行ベッドを
移動させる駆動装置とよりなり、無端ベルトグラインダ
の先端と、斜行ベッドにおける倣い棒が、それぞれ、エ
ンジンバルブと標準モデルの互いに対応する個所に当接
するように、標準モデルと倣い棒の位置を定める研削装
置によって、上述の課題の解決は図られる。According to the present invention, a gripping device that grips and rotates the horizontal engine valve shaft, a standard model fixed in parallel to the engine valve at key points on an immovable base, and a To the main bed 1, which moves parallel to the valve axis,
The top of the main bed is a diagonal bed that can be moved diagonally from the rear toward the engine valve head, and is equipped with vertical copying rods at key points, and its tip faces toward the engine valve head. , and an arm whose base is pivotally supported on a diagonal bed with a horizontal pivot perpendicular to the longitudinal direction, an excitation device that reciprocates the arm about the pivot, and a vibration device that is pivoted at the base and tip of the arm. The main bed is reciprocated back and forth from the position where the arm is directed to the rear end of the engine valve umbrella section to the position where it is directed to the front end of the umbrella section. a drive device for moving the oblique bed; and a drive device for moving the oblique bed from a standby position where the endless bell 1-grinder is spaced rearward from the umbrella portion of the engine valve to a grinding position where the endless bell grinder is in pressure contact with the rear end of the curved surface of the umbrella portion. The above-described grinding device is used to position the standard model and the copying rod so that the tip of the endless belt grinder and the copying rod on the skewed bed come into contact with mutually corresponding locations of the engine valve and the standard model, respectively. This problem will be solved.
本発明の装置を始動すると、待機位置にある斜行ベッド
とアームと無端ベルトグラインダは、把持装置により、
回転するエンジンバルブの傘部の湾曲面に向かって移動
し、回転する無端ベルトグラインダの先端が、湾曲面の
後端に圧接するとともに、倣い棒がモデルに当接する。When the apparatus of the present invention is started, the oblique bed, arm and endless belt grinder in the standby position are moved by the gripping device.
The tip of the rotating endless belt grinder moves toward the curved surface of the rotating engine valve umbrella, and the tip of the rotating endless belt grinder presses against the rear end of the curved surface, and the copying rod comes into contact with the model.
同時に、主ベッドが前進を開始して、斜行ベッドとアー
ムと無端ベルトグラインダが、倣い棒に誘導されつつ前
進し、かっ加振装置により、アームと無端ベルトグライ
ンダとが上下に往復回動されつつ、湾曲面を研削する。At the same time, the main bed starts moving forward, and the oblique bed, arm, and endless belt grinder move forward while being guided by the copying rod, and the arm and endless belt grinder are reciprocated up and down by the bracket vibration device. while grinding the curved surface.
この状態で主ベッドが前進し、かつ無端ベルトグライン
ダが、斜行ベッドとともに、次第にエンジンバルブの軸
線より遠ざかり、無端ベルトグラインダの先端が傘部の
湾曲面の前端に達すると、主ベッドは斜行ベッドととも
に待機位置へ戻る。In this state, the main bed moves forward, and the endless belt grinder, together with the oblique bed, gradually moves away from the axis of the engine valve. When the tip of the endless belt grinder reaches the front end of the curved surface of the umbrella part, the main bed moves obliquely. Return to the standby position along with the bed.
この動作を繰返えすことにより、傘部の湾曲面には、多
数の渦状溝が研削される。By repeating this operation, a large number of spiral grooves are ground into the curved surface of the umbrella.
図面は、本発明の装置が、前後方向を向く把持装置(1
)に把持されて、前方を向くエンジンバルブ(2)の傘
部の湾曲面(2a)に対し、研削により、多数の渦状溝
(3)を付設し終って、待機位置に戻った時の状態を示
すものである6
把持装置(1)の左方に位置する前後方向を向く基台(
4)の左側面には、エンジンバルブ(2)と同方向を向
き、かつそれと平行をなす標準モデル(5)が止着され
ている。The drawing shows that the device of the present invention has a gripping device (1) facing in the front-back direction.
) is returned to the standby position after a large number of spiral grooves (3) have been added by grinding to the curved surface (2a) of the umbrella part of the engine valve (2) facing forward. 6 A base facing in the front-rear direction located on the left side of the gripping device (1) (
A standard model (5) facing in the same direction as and parallel to the engine valve (2) is fixed to the left side of the engine valve (4).
基台(4)の上面に設けた前後方向を向く案内溝(4a
)には、主ベッド(6)の下面に設けた案内突条(6a
)が嵌合され、主ベッド(6)は、基台(4)の上面後
部に取付けた第1油圧シリンダ(7)の伸縮により、基
台(4)の上面に設けた前後両筒1リミットスイッチ(
8)(8)と当接する前後限位置の間を往復移動する。A guide groove (4a) facing in the front-rear direction provided on the top surface of the base (4)
) has a guide protrusion (6a) provided on the underside of the main bed (6).
) are fitted, and the main bed (6) is expanded and contracted by the first hydraulic cylinder (7) attached to the rear of the upper surface of the base (4), and the main bed (6) is moved to the front and rear cylinders 1 limit provided on the upper surface of the base (4). switch(
8) Move back and forth between the front and rear limit positions where it comes into contact with (8).
主ベッド(6)の上面には、上述の案内溝(4a)およ
び案内突条(6a)と同様の機構(図示路)により、エ
ンジンバルブ(2)の湾曲面(2a)に向かって、左後
方より右前方に移動自在の斜行ベッド(9)が載置され
ている。The upper surface of the main bed (6) is provided with a mechanism (path shown) similar to the above-mentioned guide groove (4a) and guide protrusion (6a) to the left toward the curved surface (2a) of the engine valve (2). A movable oblique bed (9) is placed from the rear to the right front.
斜行ベッド(9)の後端より左斜後方に突出する取付板
(9a)の後端には、上記モデル(5)の左方において
垂下する倣い棒(10)が固着されている。A copying rod (10) that hangs down on the left side of the model (5) is fixed to the rear end of a mounting plate (9a) that protrudes diagonally to the left from the rear end of the diagonal bed (9).
斜行ベッド(9)の上方には、それと同方向を向き、か
つそれと平行をなすアーム(11)が配置され、その中
間部の下面に設けた軸受片(12)と、斜行ベラ1〜(
9)に設けた軸受片(12)とは、アーム(11)と直
交する枢軸(14)をもって枢着されている。Above the diagonal bed (9), an arm (11) facing in the same direction and parallel to it is arranged, and a bearing piece (12) provided on the lower surface of the intermediate portion and a bearing piece (12) that is connected to the diagonal bed (9) (
The bearing piece (12) provided in the arm (11) is pivotally connected to the arm (11) with a pivot (14) perpendicular to the arm (11).
アーム(11)の先端には、長手方向を向く左右2個の
嵌合孔(] llaが穿設され、各嵌合孔(lla)に
は、エンジンバルブ(2)の湾曲面(2a)方向を向く
支杆(15)の後面に設けた連結杆(]、5a)(15
a)が摺動自在に嵌合されている。At the tip of the arm (11), there are two left and right fitting holes (]lla that face in the longitudinal direction, and each fitting hole (lla) has a hole that faces in the direction of the curved surface (2a) of the engine valve (2). Connecting rod (], 5a) (15) provided on the rear surface of the support rod (15) facing
a) is slidably fitted.
各連結杆(15a)には圧縮ばね(16)が巻装され、
支杆(]5)には、弾性前方突出力が付与されている。A compression spring (16) is wound around each connecting rod (15a),
The support rod (5) is provided with an elastic forward protrusion force.
アーム(11)の下面中央部と、支杆(15)の下面先
端には、それぞれ水平のプーリ(17) (1B)が設
けられ、両プーリ(17) (18)には、無端ベルト
グラインダ(19)が掛け回されている。一方のプーリ
(17)は、アーム(11)の上面に取付けたモータ(
20)により回走させられる。A horizontal pulley (17) (1B) is provided at the center of the lower surface of the arm (11) and at the tip of the lower surface of the support rod (15), and both pulleys (17) (18) are equipped with an endless belt grinder ( 19) is repeated. One pulley (17) is connected to a motor (
20).
斜行ベッド(9)とアーム(11)における枢軸(14
)の後方との間には、引張りコイルばね(21)が張設
されている。Pivot (14) in diagonal bed (9) and arm (11)
) is provided with a tension coil spring (21).
引張りコイルばね(21)の後方において、斜行ベッド
(9)には案内杆(22)が立設され、その上端は、ア
ーム(11)に遊嵌されている。A guide rod (22) is erected on the diagonal bed (9) behind the tension coil spring (21), and the upper end of the guide rod (22) is loosely fitted into the arm (11).
アーム(11)の下面後部の左側には圧接板(23)が
垂設され、圧接板(23)の下面は、斜行ベッド(9)
の上面に載置したモータ(24)の回転軸に嵌着された
加振装置である偏心カム(25)に圧接している。A pressure contact plate (23) is vertically installed on the left side of the lower rear surface of the arm (11), and the lower surface of the pressure contact plate (23) is connected to the diagonal bed (9).
It is in pressure contact with an eccentric cam (25), which is an excitation device, fitted onto the rotating shaft of a motor (24) placed on the top surface of the motor.
モータ(24)の回転により、アーム(11)は、上下
にゆっくりと往復回動させられる。Rotation of the motor (24) causes the arm (11) to slowly reciprocate up and down.
斜行ベッド(9)の右側面には、突片(26)が固着さ
れている。A projecting piece (26) is fixed to the right side surface of the diagonal bed (9).
斜行ベッド(9)の後方において、主ベッド(6)には
、斜行ベッド(9)と平行をなし、かつ前端が突片(2
6)に当接する第2油圧シリンダ(27)が設置されて
いる。At the rear of the diagonal bed (9), the main bed (6) is parallel to the diagonal bed (9) and has a protrusion (2) at the front end.
A second hydraulic cylinder (27) is installed which abuts on 6).
この状態において、第2油圧シリンダ(27)を伸張さ
せると、斜行ベッド(9)は前進し、その前端が主ベッ
ド(6)の右前角部に設けた第2リミツトスイツチ(2
8)に当接すると、その信号により、第2油圧シリンダ
(27)の伸張と斜行ベッド(9)の前進は停止させら
れ、かつ第2油圧シリンダ(27)は短縮する。In this state, when the second hydraulic cylinder (27) is extended, the diagonal bed (9) moves forward, and its front end touches the second limit switch (2) provided at the front right corner of the main bed (6).
8), the signal causes the extension of the second hydraulic cylinder (27) and the forward movement of the oblique bed (9) to be stopped, and the second hydraulic cylinder (27) is retracted.
この時、回走する無端ベルトグラインダ(19)の先端
は、回転するエンジンバルブ(2)の湾曲面(2a)の
後端に圧接し、倣い棒(10)は、標準モデル(5)の
傘部の湾曲面(5a)の後端に当接する。At this time, the tip of the rotating endless belt grinder (19) is pressed against the rear end of the curved surface (2a) of the rotating engine valve (2), and the copying rod (10) is attached to the standard model (5) umbrella. It abuts against the rear end of the curved surface (5a) of the section.
これと同時に、第2リミツトスイツチ(28)の信号に
より、第1油圧シリンダ(7)が作動して主ベッド(6
)は前進を開始し、アーム(11)は、斜行ベッド(9
)とともに倣い棒(10)の誘導により、標準モデル(
5)にならって前進する。At the same time, the first hydraulic cylinder (7) is actuated by the signal from the second limit switch (28), and the main bed (6) is activated.
) starts moving forward, and the arm (11) moves toward the diagonal bed (9
) as well as the standard model (
5) and move forward.
かくして、無端ベルトグラインダ(19)の先端が。Thus, the tip of the endless belt grinder (19).
エンジンバルブ(2)の湾曲面(2a)に多数の渦状溝
(3)を研削する。A large number of spiral grooves (3) are ground into the curved surface (2a) of the engine valve (2).
無端ベルトグラインダ(19)の先端が、湾曲面(2a
)の前端に達すると、湾曲面(2a)の研削に伴って後
退した斜行ベッド(9)における突片(26)が、短縮
した第2油圧シリンダ(27)に当接もしくは近接する
。The tip of the endless belt grinder (19) has a curved surface (2a
), the protruding piece (26) of the oblique bed (9) that has retreated as the curved surface (2a) is ground comes into contact with or approaches the shortened second hydraulic cylinder (27).
これと同時に、主ベッド(6)の前端は、前方の第1リ
ミツトスイツチ(8)に当接し、その信号により、第1
油圧シリンダ(7)は短縮し、主ベッド(6)は後退し
て、図示の状態に戻り、研削の1サイクルは終る。At the same time, the front end of the main bed (6) comes into contact with the first limit switch (8) in front, and the signal causes the first limit switch (8) to move forward.
The hydraulic cylinder (7) is retracted and the main bed (6) is retracted back to the state shown, completing one cycle of grinding.
後退した主ベッド(6)の後端が、後方の第1 IJミ
ツトスイッチ(8)に当接すると、その信号により、上
述の研削動作が繰返され、エンジンバルブ(2)の湾曲
面(2a)の全面が自動的に研削される。When the rear end of the main bed (6) that has retreated comes into contact with the rear first IJ Mitswitch (8), the above-mentioned grinding operation is repeated in response to the signal, and the curved surface (2a) of the engine valve (2) The entire surface of the machine is automatically ground.
本発明の装置を使用すれは、エンジンバルブの傘部の湾
曲面に、自動的に渦状溝を研削しうるので、作業が甚だ
容易で、作業能率が向」ニするとともに、均一な製品を
得ることができる。Using the device of the present invention, it is possible to automatically grind a spiral groove on the curved surface of the engine valve head, which greatly facilitates the work, improves work efficiency, and provides a uniform product. be able to.
また、装置の研削部をカバー等で覆いうるので、発生す
る粉塵を集塵機で除塵することができ、周囲の環境を害
することもない。Furthermore, since the grinding section of the device can be covered with a cover or the like, the generated dust can be removed by a dust collector, and the surrounding environment will not be harmed.
第1図は、本発明装置の一実施例を示す平面図、第2図
は、同じく正面図である。
(1)把持装置 (2)エンジンバルブ(2
a)湾曲面 (3)渦状溝(4)基台
(4a)案内溝(5)標準モデル
(5a)湾曲面(6)主ベッド (6a)
案内突条(7)第1油圧シリンダ (8)第1リミツ
トスイツチ(9)斜行ベッド (9a)取付板
(10)倣い棒 (11)アーム(Ila
)嵌合孔 (12) (13)軸受片(14
)枢軸 (15)支杆(15a)連結杆
(16)圧縮ばね(17) (18)プー
リ (19)無端ベルトグラインダ(20)モ
ータ (21)引張りコイルばね(22)
案内杆 (23)圧接板(24)モータ
(25)偏心カム(加振装置)(z6)突
片 (27)第2油圧シリンダ(28)
第2リミットスイッチFIG. 1 is a plan view showing one embodiment of the apparatus of the present invention, and FIG. 2 is a front view of the same. (1) Gripping device (2) Engine valve (2
a) Curved surface (3) Spiral groove (4) Base
(4a) Guide groove (5) Standard model
(5a) Curved surface (6) Main bed (6a)
Guide protrusion (7) First hydraulic cylinder (8) First limit switch (9) Diagonal bed (9a) Mounting plate (10) Follower rod (11) Arm (Ila
) Fitting hole (12) (13) Bearing piece (14
) Pivot (15) Support rod (15a) Connection rod (16) Compression spring (17) (18) Pulley (19) Endless belt grinder (20) Motor (21) Tension coil spring (22)
Guide rod (23) Pressure plate (24) Motor
(25) Eccentric cam (vibration device) (z6) Projection piece (27) Second hydraulic cylinder (28)
2nd limit switch
Claims (1)
持装置と、不動の基台の要所に、エンジンバルブと平行
に止着された標準モデルと、基台上をエンジンバルブの
軸線と平行に移動する主ベッドと、主ベッド上を、エン
ジンバルブの傘部に向かって、後方より斜めに移動可能
で、かつ要所に垂直の倣い棒を備える斜行ベッドと、先
端部がエンジンバルブの傘部方向を向き、かつ基部が、
長手方向と直交する水平の枢軸をもって斜行ベッドに枢
支されたアームと、アームをその枢軸まわりに往復回動
させる加振装置と、アームの基部とその先端部に枢設し
たプーリに掛け回され、かつモータにより回走させられ
る無端ベルトグラインダと、アームがエンジンバルブ傘
部の後端を指向する位置より、傘部の前端を指向する位
置まで、主ベッドを前後に往復移動させる駆動装置と、
無端ベルトグラインダがエンジンバルブの傘部より後方
に離間する待機位置より、傘部の湾曲面の後端に圧接す
る研削位置まで、斜行ベッドを移動させる駆動装置とよ
りなり、無端ベルトグラインダの先端と、斜行ベッドに
おける倣い棒が、それぞれ、エンジンバルブと標準モデ
ルの互に対応する個所に当接するように、標準モデルと
倣い棒の位置を定めてあることを特徴とするエンジンバ
ルブにおける傘部の湾曲面に対する渦状溝研削装置。A gripping device that grips and rotates the shaft of a horizontal engine valve, a standard model that is fixed parallel to the engine valve at key points on an immovable base, and a gripping device that rotates by gripping the shaft of the engine valve that is horizontal, and a standard model that is fixed parallel to the engine valve at key points on an immovable base. A main bed that moves to the top of the main bed, a diagonal bed that can be moved diagonally from the rear on the main bed toward the umbrella part of the engine valve, and is equipped with vertical tracing rods at key points, facing the direction of the umbrella, and the base is
An arm is pivotally supported on a diagonal bed with a horizontal axis perpendicular to the longitudinal direction, an excitation device that reciprocates the arm around the axis, and a pulley mounted on the base and tip of the arm. an endless belt grinder which is rotated by a motor; and a drive device which reciprocates the main bed back and forth from a position where the arm points toward the rear end of the engine valve umbrella section to a position where the arm points toward the front end of the umbrella section. ,
The driving device moves the diagonal bed from the standby position where the endless belt grinder is spaced behind the engine valve umbrella to the grinding position where it presses against the rear end of the curved surface of the engine valve. and an umbrella part in an engine valve, characterized in that the positions of the standard model and the copying rod are determined so that the copying rods on the skew bed abut mutually corresponding locations on the engine valve and the standard model, respectively. Spiral groove grinding device for curved surfaces.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4532989A JP2691362B2 (en) | 1989-02-28 | 1989-02-28 | Spiral groove grinding device for curved surface of umbrella in engine valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4532989A JP2691362B2 (en) | 1989-02-28 | 1989-02-28 | Spiral groove grinding device for curved surface of umbrella in engine valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02224964A true JPH02224964A (en) | 1990-09-06 |
JP2691362B2 JP2691362B2 (en) | 1997-12-17 |
Family
ID=12716275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4532989A Expired - Fee Related JP2691362B2 (en) | 1989-02-28 | 1989-02-28 | Spiral groove grinding device for curved surface of umbrella in engine valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2691362B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015061734A (en) * | 2013-08-20 | 2015-04-02 | 株式会社サンシン | Ball screw polishing method and device thereof |
CN110509144A (en) * | 2019-09-05 | 2019-11-29 | 滨州职业学院 | A kind of boat diesel engine grinding apparatus |
CN111992696A (en) * | 2020-09-23 | 2020-11-27 | 安徽省含山县富坤铸造厂 | Casting part curved surface grinding mechanism |
-
1989
- 1989-02-28 JP JP4532989A patent/JP2691362B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015061734A (en) * | 2013-08-20 | 2015-04-02 | 株式会社サンシン | Ball screw polishing method and device thereof |
CN110509144A (en) * | 2019-09-05 | 2019-11-29 | 滨州职业学院 | A kind of boat diesel engine grinding apparatus |
CN111992696A (en) * | 2020-09-23 | 2020-11-27 | 安徽省含山县富坤铸造厂 | Casting part curved surface grinding mechanism |
Also Published As
Publication number | Publication date |
---|---|
JP2691362B2 (en) | 1997-12-17 |
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LAPS | Cancellation because of no payment of annual fees |