JPH06346780A - Manufacture of two layer liner for engine - Google Patents
Manufacture of two layer liner for engineInfo
- Publication number
- JPH06346780A JPH06346780A JP16521393A JP16521393A JPH06346780A JP H06346780 A JPH06346780 A JP H06346780A JP 16521393 A JP16521393 A JP 16521393A JP 16521393 A JP16521393 A JP 16521393A JP H06346780 A JPH06346780 A JP H06346780A
- Authority
- JP
- Japan
- Prior art keywords
- layer material
- outer layer
- liner
- inner layer
- canning
- 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.)
- Withdrawn
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ディーゼルエンジンな
どに適用される２層ライナの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a two-layer liner applied to a diesel engine or the like.
【０００２】[0002]
【従来の技術】従来、この種２層ライナは（１）二重遠
心鋳造法および（２）ＨＩＰ* 法によって製造されてい
る。（１）については内層材が鋳鉄に限定されること、
鋳造時の温度管理がむずかしく品質が安定しにくいこと
の欠点がある。（２）については、ＨＩＰ装置が高価
で、かつランニングコストも高いことからライナ自体が
極めて高価であるという欠点があった。* 熱間等方圧加圧法（ＨＯＴ ＩＳＯＳＴＡＴＩＣ Ｐ
ＲＥＳＳＩＮＧ）2. Description of the Related Art Conventionally, this type of two-layer liner is manufactured by (1) double centrifugal casting method and (2) HIP * method. Regarding (1), the inner layer material is limited to cast iron,
There is a drawback in that the temperature control during casting is difficult and the quality is difficult to stabilize. Regarding (2), there is a drawback that the liner itself is extremely expensive because the HIP device is expensive and the running cost is high. * Hot isostatic pressing method (HOT ISOSTATIC P
(RESSING)
【０００３】[0003]
【発明が解決しようとする課題】本発明は、ＨＩＰ法に
よる２層ライナと同じく内，外層材を固相接合すること
によって２層化する方法と類似のものであるが、固相接
合の手段が全く異なるものである。ＨＩＰ法は図１に示
す状態（除く真空ポンプ（Ｐ））で、ＨＩＰ処理装置に
挿入し、処理材全体を加熱すると共に、雰囲気ガスを加
圧して処理材全体を加圧し、外層材１ａと内層材１ｂを
固相接合して２層化を図ったもので、設備費が高いこと
及び不活性ガスを大量に使用することからランニングコ
ストが高く、したがって製造コストが極めて高いという
欠点があった。The present invention is similar to the two-layer liner by the HIP method in which the inner and outer layer materials are solid-phase joined to form two layers. Is completely different. The HIP method is the state shown in FIG. 1 (excluding the vacuum pump (P)), which is inserted into the HIP processing apparatus to heat the entire processing material and pressurize the atmosphere gas to press the entire processing material to form the outer layer material 1a. Since the inner layer material 1b is solid-phase-bonded to form two layers, there is a drawback that the running cost is high because of the high equipment cost and the large amount of inert gas used, and therefore the manufacturing cost is extremely high. .
【０００４】本発明は、製造コストを下げ、製品（２層
ライナ）の市場性を高めるためにＨＩＰ法のガス加圧に
替って、材料の熱膨脹係数の差を利用して内外層材を接
合して２層化を図ったものである。本発明目的は加熱手
段が一般の電気炉（熱処理炉）で十分であり、特殊な設
備を使用する必要もなくコストは通常の熱処理コストの
みで十分であり約１／１０に低減できるエンジン用２層
ライナの製造方法を提供するにある。The present invention replaces the gas pressurization of the HIP method in order to reduce the manufacturing cost and enhance the marketability of the product (two-layer liner), and utilizes the difference in the thermal expansion coefficient of the materials to form the inner and outer layer materials. It is intended to have two layers by joining. For the purpose of the present invention, a general electric furnace (heat treatment furnace) is sufficient as a heating means, there is no need to use special equipment, and the cost can be reduced to about 1/10 because the ordinary heat treatment cost is sufficient. A method of manufacturing a layer liner is provided.
【０００５】[0005]
【課題を解決するための手段】本発明のエンジン用２層
ライナの製造方法は、２層ライナにおいて、外層材１ａ
の内側に内層材１ｂを挿入し、さらにその内側にキャニ
ング材１ｃを配して、上記外層材とキャニング材とをシ
ール溶接し、外層材１ａに設けられた吸気孔２を介し
て、真空ポンプにより外層材１ａと内層材１ｂの空隙を
真空（１×１０-2Ｔｏｒｒ以下）にしたのち、キャニン
グ材１ｃの内側に上記の各部材よりも熱膨脹係数の大き
な部材３を挿入して、全体を８００℃以上に加熱して、
外層材１ａと内層材１ｂを接合することを特徴としてい
る。なお部材３の外面には離形材を塗布し、内外層材の
接合が完了した時点（熱処理完了後）で、内外層材から
部材３が容易にはずれるようにしておく必要がある。こ
れによって、部材はくり返し使用することが可能とな
る。The method for manufacturing a two-layer liner for an engine according to the present invention is a two-layer liner, and in the two-layer liner, the outer layer material 1a is used.
The inner layer material 1b is inserted inside, and the canning material 1c is further placed inside thereof, and the outer layer material and the canning material are seal-welded to each other, and the vacuum pump is provided through the air intake hole 2 provided in the outer layer material 1a. After making the gap between the outer layer material 1a and the inner layer material 1b into a vacuum (1 × 10 -2 Torr or less), insert a member 3 having a larger thermal expansion coefficient than the above-mentioned members inside the canning material 1c, Heat it to 800 ℃ or higher,
The outer layer material 1a and the inner layer material 1b are joined together. It is necessary to apply a release material to the outer surface of the member 3 so that the member 3 can be easily displaced from the inner and outer layer materials when the joining of the inner and outer layer materials is completed (after the heat treatment is completed). This allows the member to be used repeatedly.
【０００６】[0006]
【作用】内外層材の内側に挿入した部材３は、接合すべ
き外層材１ａおよび内層材１ｂより熱膨脹係数が大きい
ため、電気炉内で加熱されるにつれて、内層材１ｂに接
触し、さらに内層材１ｂを内側から広げる方向に力を与
える。したがって、内層材１ｂは変形し内層材１ｂと外
層材１ａはそのすき間がなくなり、かつ一定の加圧力が
付加される。The member 3 inserted inside the inner / outer layer material has a larger coefficient of thermal expansion than the outer layer material 1a and the inner layer material 1b to be joined. Therefore, as it is heated in the electric furnace, the member 3 comes into contact with the inner layer material 1b and further A force is applied in the direction of expanding the material 1b from the inside. Therefore, the inner layer material 1b is deformed, the gap between the inner layer material 1b and the outer layer material 1a is eliminated, and a constant pressing force is applied.
【０００７】特に８００℃以上の高温になると、内外層
材の変形抵抗が小さくなるので、両者は容易に面接触が
起り、元素の拡散によって固相接合が完了する。一方、
外層材１ａは内層材１ｂより数倍厚肉であるため外層材
１ａにくらべ内層材１ｂの変形が容易となり、部材の熱
膨脹の差に基づく力が接合すべき内外層材の接触面に付
加されることになり容易に接合される。Particularly, when the temperature becomes higher than 800 ° C., the deformation resistance of the inner and outer layer materials becomes small, so that the two easily come into surface contact with each other and the solid phase bonding is completed by the diffusion of elements. on the other hand,
Since the outer layer material 1a is several times thicker than the inner layer material 1b, the inner layer material 1b can be deformed more easily than the outer layer material 1a, and the force based on the difference in thermal expansion of the members is added to the contact surfaces of the inner and outer layer materials to be joined. It will be easily joined.
【０００８】[0008]
【実施例】以下図１〜４を参照し本発明の一実施例につ
いて説明する。図４は、従来より用いられているエンジ
ン用シリンダライナの分割型２層ライナの縦断面図であ
る。１′が２層ライナで上部ライナ、２′は通常の鋳造
ライナで下部ライナと称される。上部ライナのうち１′
ａは高強度の外層材で、燃焼室内の最高筒内圧力（ＰＭ
ＡＸ）の上昇に対応する機能を有する。１′ｂは内層材
で主として、摺動性，耐摩耗性を維持するためのもの
で、通常は鋳鉄が用いられている。本発明はこの２層化
した上部ライナの製造に関するものである。An embodiment of the present invention will be described below with reference to FIGS. FIG. 4 is a vertical cross-sectional view of a split type two-layer liner of an engine cylinder liner that has been conventionally used. 1'is a two-layer liner, an upper liner, 2'is a conventional cast liner and is called a lower liner. 1'of the upper liner
a is a high-strength outer layer material, and has the highest in-cylinder pressure (PM
It has a function corresponding to the increase of AX). 1'b is an inner layer material mainly for maintaining slidability and wear resistance, and cast iron is usually used. The present invention relates to the manufacture of this two-layered top liner.
【０００９】以下、実施例に基づいて、本発明の詳細に
ついて説明する。図１は、本発明の第１工程を示す縦断
面図である。１ａは外層材で、炭素鋼又は合金鋼で構成
される。１ｂは内層材で、外層材１ａの内側に挿入され
ている。この内層材は、シリンダ内面を構成するため、
摺動性及び耐摩耗性に優れた従来の鋳鉄又はこれと同等
の性能を有する材料で構成される。The present invention will be described in detail below based on examples. FIG. 1 is a vertical sectional view showing a first step of the present invention. 1a is an outer layer material, which is made of carbon steel or alloy steel. 1b is an inner layer material, which is inserted inside the outer layer material 1a. Since this inner layer material constitutes the inner surface of the cylinder,
It is made of conventional cast iron having excellent slidability and wear resistance or a material having equivalent performance.
【００１０】次にこの内層材の内側にキャニング材１ｃ
と称される円筒を挿入し、これと外層材１ａとをアーク
溶接でシールする。１ｄはシール溶接部を示す。このキ
ャニング材１ｃは、内層材が鋳鉄のような難溶接材でな
ければ、内層材１ｂと外層材１ｄとを直接シール溶接で
きるので不要となる。その後、あらかじめ外層材１ａに
あけておいた吸気孔に配管２を取り付け真空ポンプによ
りそれぞれの隙間の空気を脱気し真空にする。なお、シ
ール溶接を電子ビーム溶接で行えば、シール溶接後の各
部材の隙間は真空が維持されるので、吸気孔および真空
ポンプは不要である。Next, the canning material 1c is placed inside the inner layer material.
A cylinder referred to as is inserted and the outer layer material 1a is sealed by arc welding. 1d shows a seal welding part. This canning material 1c is unnecessary because the inner layer material 1b and the outer layer material 1d can be directly seal-welded unless the inner layer material is a difficult-welding material such as cast iron. After that, the pipe 2 is attached to the air intake hole previously formed in the outer layer material 1a, and the air in each gap is deaerated by the vacuum pump to make a vacuum. If the seal welding is performed by electron beam welding, the vacuum is maintained in the gap between the members after the seal welding, so that the intake hole and the vacuum pump are not necessary.
【００１１】次に配管２をつぶし、その切口をシール溶
接した後、更にキャニング材１ｃの内側に部材３を挿入
する。この時、部材３の表面又はキャニング材１ｃの内
面には離形材を塗布し、両者の焼付きを防止する。部材
３は、必ず外層材１ａ及び内層材１ｂよりも熱膨脹係数
の大きい材料を用いることが肝要である。図２は、本発
明の主要部分を示すもので、内層材１ｂと外層材１ａを
接合する前の組立状況を示す縦断面である。この図２の
状態のものを電気炉などで加熱・冷却し、部材３を引抜
けば本発明の製造は完了し、２層ライナの素材が出来上
がる。後は機械加工によって図面通りの形状に仕上げる
だけである。Next, the pipe 2 is crushed, the cut end thereof is seal-welded, and then the member 3 is inserted inside the canning material 1c. At this time, a release agent is applied to the surface of the member 3 or the inner surface of the canning material 1c to prevent the seizure of both. For the member 3, it is essential to use a material having a larger thermal expansion coefficient than the outer layer material 1a and the inner layer material 1b. FIG. 2 shows a main part of the present invention and is a vertical cross-sectional view showing an assembled state before the inner layer material 1b and the outer layer material 1a are joined. When the member shown in FIG. 2 is heated and cooled in an electric furnace or the like and the member 3 is pulled out, the production of the present invention is completed, and the material for the two-layer liner is completed. The rest is simply machined into the shape shown in the drawing.
【００１２】図３は、加熱した状態でのそれぞれの外層
材１ａ、内層材１ｂ、部材３の膨脹量の差を示すもの
で、図の如く、高温（８００℃以上）での外層材１ａと
部材３の膨脹差（ΔＤ）に相当する力が外層材１ａと内
層材１ｂの接触面に付加され固相接合が完了する。この
時の面圧は約２〜３ｋｇｆ／ｍｍ2 程度であれば十分で
あり、この応力は、部材間の熱膨脹差を利用することで
十分確保できる。また、この応力を接合すべき面間に確
実に作用させるためには、部材３は熱膨脹係数が大きい
こととともに、高温強度も出来るだけ高い方が望まし
い。FIG. 3 shows the difference in expansion amount between the outer layer material 1a, the inner layer material 1b and the member 3 in a heated state. As shown in FIG. 3, the outer layer material 1a and the outer layer material 1a at a high temperature (800 ° C. or higher). A force corresponding to the expansion difference (ΔD) of the member 3 is applied to the contact surface between the outer layer material 1a and the inner layer material 1b to complete the solid phase bonding. It is sufficient that the surface pressure at this time is approximately 2 to 3 kgf / mm 2 , and this stress can be sufficiently secured by utilizing the difference in thermal expansion between the members. Further, in order to surely apply this stress between the surfaces to be joined, it is desirable that the member 3 has a large coefficient of thermal expansion and also a high temperature strength as high as possible.
【００１３】[0013]
【発明の効果】本発明は、ディーゼルエンジン用シリン
ダライナの２層化をＨＩＰ装置などの専用設備を使用せ
ず、簡便に製造するための方法を提供するものであり、
又、従来の２重遠心鋳造法のように温度管理がむずかし
く品質に不安が残るような生産手段でなく、確実に接合
が可能である方法を提供するものである。したがって、
本発明によれば製造コストは、従来のＨＩＰ法による場
合の約１／１０で済み、産業上極めて有効な方法であ
る。EFFECTS OF THE INVENTION The present invention provides a method for simply producing a two-layer cylinder liner for a diesel engine without using a dedicated equipment such as a HIP device.
Further, the present invention provides a method capable of reliable joining, not a production means such as the conventional double centrifugal casting method in which temperature control is difficult and quality remains uncertain. Therefore,
According to the present invention, the manufacturing cost is about 1/10 of that of the conventional HIP method, which is an extremely effective method in industry.
【図１】本発明の実施例に係る第一工程の組立状況を示
す断面図FIG. 1 is a sectional view showing an assembled state of a first step according to an embodiment of the present invention.
【図２】本発明の実施例に係る第二工程の組立状況を示
す断面図FIG. 2 is a sectional view showing an assembled state of a second step according to the embodiment of the present invention.
【図３】本発明の要点を表す温度と膨脹量の相関図FIG. 3 is a correlation diagram of temperature and expansion amount, which represents the essential points of the present invention.
【図４】従来の分割型２層ライナを示す断面図FIG. 4 is a sectional view showing a conventional split type two-layer liner.
１ａ…外層材、１ｂ…内層材、１ｃ…キャニング材、１
ｄ…シール溶接部、２…真空ポンプ配管、３…部材。1a ... Outer layer material, 1b ... Inner layer material, 1c ... Canning material, 1
d ... Seal weld, 2 ... Vacuum pump piping, 3 ... Member.
Claims (1)
（１ａ）の内側に内層材（１ｂ）を挿入し、さらにその
内側にキャニング材（１ｃ）を配して、上記外層材とキ
ャニング材とをシール溶接し、外層材（１ａ）に設けら
れた吸気孔（２）を介して、真空ポンプにより外層材
（１ａ）と内層材（１ｂ）の空隙を真空（１×１０-2Ｔ
ｏｒｒ以下）にしたのち、キャニング材（１ｃ）の内側
に上記の各部材よりも熱膨脹係数の大きな部材（３）を
挿入して、全体を８００℃以上に加熱して、外層材（１
ａ）と内層材（１ｂ）を接合することを特徴とするエン
ジン用２層ライナの製造方法。1. In a two-layer liner for an engine, an inner layer material (1b) is inserted inside an outer layer material (1a), and a canning material (1c) is arranged inside the outer layer material (1a) to provide the outer layer material and the canning material. Are sealed and welded, and a vacuum pump is used to create a vacuum (1 × 10 −2 T) between the outer layer material (1a) and the inner layer material (1b) through an air intake hole (2) provided in the outer layer material (1a).
(or or less), the member (3) having a larger coefficient of thermal expansion than the above-mentioned members is inserted inside the canning material (1c), and the whole is heated to 800 ° C. or more to form the outer layer material (1).
A method for producing a two-layer liner for an engine, comprising joining a) and an inner layer material (1b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16521393A JPH06346780A (en) | 1993-06-10 | 1993-06-10 | Manufacture of two layer liner for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16521393A JPH06346780A (en) | 1993-06-10 | 1993-06-10 | Manufacture of two layer liner for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06346780A true JPH06346780A (en) | 1994-12-20 |
Family
ID=15808003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16521393A Withdrawn JPH06346780A (en) | 1993-06-10 | 1993-06-10 | Manufacture of two layer liner for engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06346780A (en) |
-
1993
- 1993-06-10 JP JP16521393A patent/JPH06346780A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000905 |