JPH0541349B2 - - Google Patents
Info
- Publication number
- JPH0541349B2 JPH0541349B2 JP62182795A JP18279587A JPH0541349B2 JP H0541349 B2 JPH0541349 B2 JP H0541349B2 JP 62182795 A JP62182795 A JP 62182795A JP 18279587 A JP18279587 A JP 18279587A JP H0541349 B2 JPH0541349 B2 JP H0541349B2
- Authority
- JP
- Japan
- Prior art keywords
- core material
- valve
- nozzle
- shaft
- crushed
- 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.)
- Expired - Lifetime
Links
- 239000011162 core material Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
- B22D29/001—Removing cores
- B22D29/002—Removing cores by leaching, washing or dissolving
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は内燃機関用中空弁の製造において該弁
の傘部及び軸部の内部から芯材を除去する方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for removing a core material from the inside of a head portion and a shaft portion of a hollow valve for an internal combustion engine in manufacturing the valve.
（従来の技術）
内燃機関等において弁は高速回転で使用される
ため、出来るだけ重量を軽くする必要があり、そ
のために弁の傘部及び軸部は中空状に製造されて
いる。弁を中空状に製造する工程において芯材と
して使用した炭素、黒鉛、鋳物砂、セラミツス粉
末等の物質が芯材として弁の傘部及び軸部に充填
されたまま残留しているので、あと処理としてこ
れらの物質を除去する必要がある。(Prior Art) Since valves are used at high speeds in internal combustion engines and the like, it is necessary to reduce their weight as much as possible, and for this purpose, the valve head and shaft are manufactured to be hollow. In the process of manufacturing hollow valves, materials such as carbon, graphite, foundry sand, and ceramic powder used as core materials remain filled in the cap and shaft of the valve as core materials, so post-processing is required. It is necessary to remove these substances.
従来使用されてきた中空弁の芯材は除去方法を
第５図乃至第８図に示す。弁は傘部１と軸部２か
らできている。これらの両部の内部に製造時使用
した炭素、黒鉛、鋳物砂セラミツクス粉末等の芯
材３が充満している。この芯材を除去する工程を
図面に関連して順番に説明する。 A method for removing the core material of a conventionally used hollow valve is shown in FIGS. 5 to 8. The valve is made up of an umbrella part 1 and a shaft part 2. Both of these parts are filled with a core material 3 such as carbon, graphite, foundry sand ceramic powder, etc. used during manufacturing. The process of removing this core material will be explained in order with reference to the drawings.
第５図において、軸部２の端部からドリル４を
回転させながら挿入して軸部２の内部全体と傘部
１の内部の一部分の芯材３を除去する。しかし、
傘部１の内部の芯材３は図示のように周辺部にま
だ相当量残留している。次に第６図に示すよう傘
部１の底面に円形孔５を旋削してこの孔から残留
芯材を除去する。除去した状態を第７図に示す。
次に第８図に示すように前記孔５に補合する大き
さ形状の円板６を該孔に溶接等にて密封固定す
る。以上の工程により弁の傘部及び軸部の内部の
芯材３はすべてが除去される。 In FIG. 5, a drill 4 is rotated and inserted from the end of the shaft 2 to remove the entire interior of the shaft 2 and a portion of the core 3 inside the umbrella 1. but,
As shown in the figure, a considerable amount of the core material 3 inside the umbrella part 1 still remains on the periphery. Next, as shown in FIG. 6, a circular hole 5 is cut in the bottom surface of the umbrella part 1, and the remaining core material is removed from this hole. FIG. 7 shows the removed state.
Next, as shown in FIG. 8, a disk 6 having a size and shape that complements the hole 5 is hermetically fixed to the hole by welding or the like. Through the above steps, all of the core material 3 inside the valve head and shaft are removed.
（発明が解決しようとする問題点）
しかしながら、このような従来の方法は弁の傘
部の内部の芯材を除去するために、傘部の底面に
円形孔を旋削し、ここから芯材を除去し、この孔
を再び円板の栓で密封溶接して元通りにする作業
を含むために、コストの面や溶接歪み等の面で多
くの問題を生ずる。(Problems to be Solved by the Invention) However, in order to remove the core material inside the valve cap, such conventional methods cut a circular hole in the bottom of the cap and remove the core material from there. Since this involves the work of removing the hole and sealingly welding the hole again with a disk plug to restore the original state, many problems arise in terms of cost and welding distortion.
本発明はこのような現状に鑑みてなされたもの
であつて、弁の一部分を切削加工せずにすべての
芯材を除去することができる中空弁の芯材の除去
方法を提供することを目的とするものである。 The present invention was made in view of the current situation, and an object of the present invention is to provide a method for removing the core material of a hollow valve that can remove all the core material without cutting a part of the valve. That is.
（問題点を解決するための手段）
上記の目的を達成するために本発明の中空弁の
芯材の除去方法は、弁の軸部の内径より小径のパ
イプ状のノズルの先端より噴射されるウオーター
ジエツトの作用を利用して芯材を破砕し、該破砕
芯材を弁の軸部の内径と前記ノズルの外径との間
を通つて水流と一緒に搬送して外部へ排出するよ
うに構成した。(Means for Solving the Problems) In order to achieve the above object, the method for removing the core material of a hollow valve of the present invention is such that the core material of a hollow valve is injected from the tip of a pipe-shaped nozzle having a smaller diameter than the inner diameter of the valve shaft. The core material is crushed using the action of the water jet, and the crushed core material is conveyed along with the water flow between the inner diameter of the valve shaft and the outer diameter of the nozzle, and is discharged to the outside. It was configured as follows.
（作用）
上述のようにウオータージエツトの力を利用し
て芯材の破砕と搬送と排出を連続的に実施し、且
つジエツトの噴射方向を変化させることにより弁
の傘部内部の狭い湾入部に在る芯材も効果的に粉
砕除去することができる。(Function) As mentioned above, by continuously crushing, transporting and discharging the core material using the force of the water jet, and by changing the injection direction of the jet, the narrow inlet inside the valve head can be crushed. The core material present in the core material can also be effectively crushed and removed.
（実施例）
以下、図面に示す実施例に基づいて本発明を説
明する。(Example) The present invention will be described below based on an example shown in the drawings.
第１図は本発明の中空弁の芯材の除去方法を実
施する装置の略図である。軸部１と傘部２からな
る弁が回転台７に載せられチヤツク爪８にて固定
されている。弁と回転台の軸線は一線上に並んで
いる。回転台７は矢印Ａに示すように回転する。
ノズル９が上下動スピンドル１０に固定され、ま
た該ノズル９の１端は可撓性ホース１１により超
高圧ポンプ１２に連結されている。前記ノズル９
の他端に設けられた小孔１３により超高圧ウオー
タージエツト噴射する。前記ノズル９の小孔１３
は第２図に詳細に示すように弁の傘部２の内部底
面１４に対し垂直方向に向けられている。ノズル
９の外面と弁の軸部１の内径との間に〓間が存在
する。 FIG. 1 is a schematic diagram of an apparatus for carrying out the method for removing core material of a hollow valve according to the present invention. A valve consisting of a shaft part 1 and an umbrella part 2 is placed on a rotary table 7 and fixed with a chuck claw 8. The axes of the valve and rotary table are aligned. Rotating table 7 rotates as shown by arrow A.
A nozzle 9 is fixed to a vertically movable spindle 10, and one end of the nozzle 9 is connected to an ultra-high pressure pump 12 by a flexible hose 11. Said nozzle 9
Ultra-high pressure water jet is injected through a small hole 13 provided at the other end. Small hole 13 of the nozzle 9
are oriented perpendicularly to the inner bottom surface 14 of the valve head 2, as shown in detail in FIG. A gap exists between the outer surface of the nozzle 9 and the inner diameter of the valve shaft 1.
以上の構成になるノズル９を軸部１の中に挿入
してスピンドル１０により下降させる。同時に超
高圧ポンプ１２より給送される高圧水のジエツト
を該ノズル９から噴射する。このウオータージエ
ツトの作用により弁内に充満している芯材３を
徐々に破砕する。破砕された芯材は水流に乗つて
弁の軸部とノズルの間に間〓を上昇して図の如く
Ｂ方向に排出される。この高圧水による芯材の破
砕と搬送と排出作用を調節自在に行うことができ
る。ノズル９が弁の傘部の内部底面１４に突き当
る直前に自動的にその下降を停止する。次に該ノ
ズルがスピンドル１０と共に上昇して弁の上端か
ら外れる。同時に該ノズルからの水の噴射は停止
し、回転台７もその回転を停止する。第２図に示
したノズル９を使用した場合弁の傘部２の内部の
周辺湾入部に在る芯材３は破砕しにくく残留して
いる。 The nozzle 9 configured as described above is inserted into the shaft portion 1 and lowered by the spindle 10. At the same time, a jet of high-pressure water supplied by the ultra-high pressure pump 12 is injected from the nozzle 9. The action of this water jet gradually crushes the core material 3 filling the valve. The crushed core material rides the water flow and rises between the valve shaft and the nozzle and is discharged in the direction B as shown in the figure. The crushing, conveyance, and discharge of the core material by this high-pressure water can be performed in a freely adjustable manner. Immediately before the nozzle 9 hits the inner bottom surface 14 of the valve head part, its descent is automatically stopped. The nozzle then rises with the spindle 10 out of the upper end of the valve. At the same time, the water jetting from the nozzle stops, and the rotating table 7 also stops rotating. When the nozzle 9 shown in FIG. 2 is used, the core material 3 present in the peripheral indentation inside the valve head portion 2 remains difficult to crush.
次にこのノズル９を第４図に示すノズル９′に
取り換える。該ノズル９′は水平方向に対し斜め
下方角度αに向けられた複数個の小孔１３′を有
する。該ノズル９′を弁の内部に下降して高圧水
を噴射すれば（第３図）、前述の傘部の内部に残
留していた芯材３を破砕して前述のように搬送し
且つ排出することができる。以上のようにして中
空弁の内部のすべての芯材を排出することができ
る。ノズルの小孔の水噴出角度や高圧水の圧力や
回転台７の回転速度等は自由に設計することがで
きる。 Next, this nozzle 9 is replaced with a nozzle 9' shown in FIG. The nozzle 9' has a plurality of small holes 13' oriented at an obliquely downward angle α with respect to the horizontal direction. When the nozzle 9' is lowered into the inside of the valve and high-pressure water is injected (Fig. 3), the core material 3 remaining inside the aforementioned umbrella part is crushed and transported and discharged as described above. can do. All the core material inside the hollow valve can be discharged in the above manner. The water jetting angle of the small hole of the nozzle, the pressure of high-pressure water, the rotation speed of the rotary table 7, etc. can be freely designed.
（発明の効果）
本発明は以上説明した構成を有するから、弁を
傷つけることなく高速度で中空弁内部の芯材を完
全に除去することができるようになつた。(Effects of the Invention) Since the present invention has the configuration described above, it has become possible to completely remove the core material inside the hollow valve at high speed without damaging the valve.
第１図は本発明の方法を実施する装置の全体的
略図、第２図は本発明の方法に使用するノズルの
断面図、第３図は第４図のノズルを使用した第１
図の装置の全体的略図、第４図は別のノズルの断
面図、第５図乃至第８図は従来の中空弁の芯材の
除去方法を工程順に示した断面図である。
１……傘部、２……軸部、３……芯材、４……
ドリル、５……孔、６……円板、７……回転台、
８……チヤツク爪、９，９′……ノズル、１０…
…上下動スピンドル、１１……可撓性ホース、１
２……ポンプ、１３，１３′……小孔、１４……
内部底面。
FIG. 1 is an overall schematic diagram of an apparatus for carrying out the method of the present invention, FIG. 2 is a sectional view of a nozzle used in the method of the present invention, and FIG. 3 is a first diagram using the nozzle of FIG.
FIG. 4 is a cross-sectional view of another nozzle, and FIGS. 5 to 8 are cross-sectional views showing a conventional method for removing the core material of a hollow valve in the order of steps. 1... Umbrella part, 2... Shaft part, 3... Core material, 4...
Drill, 5... Hole, 6... Disc, 7... Turntable,
8...chuck claw, 9,9'...nozzle, 10...
... Vertical spindle, 11 ... Flexible hose, 1
2...Pump, 13, 13'...Small hole, 14...
Internal bottom.
Claims (1)
砂、セラミツクス粉末等の物質からなる芯材を除
去する方法において、超高圧ポンプに接続された
ノズルを前記弁の軸端より弁内部に挿入し、該ノ
ズルより噴出するウオータージエツトにより前記
芯材を破砕し前記弁の内部と前記ノズルとの間の
間〓間通つて水と共に前記破砕芯材を排出するこ
とを特徴とする中空弁の芯材の除去方法。1 In a method for removing a core material made of substances such as carbon, graphite, foundry sand, ceramic powder, etc. that is filled inside a valve, a nozzle connected to an ultra-high pressure pump is inserted into the valve from the shaft end of the valve. A hollow valve characterized in that the core material is crushed by a water jet ejected from the nozzle, and the crushed core material is discharged together with water between the inside of the valve and the nozzle. How to remove core material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18279587A JPS6427767A (en) | 1987-07-22 | 1987-07-22 | Removal of core metal for hollow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18279587A JPS6427767A (en) | 1987-07-22 | 1987-07-22 | Removal of core metal for hollow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6427767A JPS6427767A (en) | 1989-01-30 |
| JPH0541349B2 true JPH0541349B2 (en) | 1993-06-23 |
Family
ID=16124551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18279587A Granted JPS6427767A (en) | 1987-07-22 | 1987-07-22 | Removal of core metal for hollow valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6427767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714686A (en) * | 2018-06-04 | 2018-10-30 | 含山县兴达球墨铸铁厂 | A kind of continuous-flow type shell casting inner cavity fettling installation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0741562Y2 (en) * | 1990-01-29 | 1995-09-27 | マツダ株式会社 | Sanding device for core sand of castings |
| US5778963A (en) * | 1996-08-30 | 1998-07-14 | United Technologies Corporation | Method of core leach |
| JP2011224538A (en) * | 2009-12-01 | 2011-11-10 | Ibiden Co Ltd | Honeycomb filter and apparatus for cleaning exhaust gas |
| CN103949619A (en) * | 2014-04-18 | 2014-07-30 | 常熟市勤丰铸件厂 | Sand cleaning machine fixing plate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS619962A (en) * | 1984-06-27 | 1986-01-17 | Honda Motor Co Ltd | Method and device for stripping sand from casting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62109854U (en) * | 1985-12-25 | 1987-07-13 |
-
1987
- 1987-07-22 JP JP18279587A patent/JPS6427767A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS619962A (en) * | 1984-06-27 | 1986-01-17 | Honda Motor Co Ltd | Method and device for stripping sand from casting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108714686A (en) * | 2018-06-04 | 2018-10-30 | 含山县兴达球墨铸铁厂 | A kind of continuous-flow type shell casting inner cavity fettling installation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6427767A (en) | 1989-01-30 |
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