JPS6342689B2 - - Google Patents
Info
- Publication number
- JPS6342689B2 JPS6342689B2 JP58155136A JP15513683A JPS6342689B2 JP S6342689 B2 JPS6342689 B2 JP S6342689B2 JP 58155136 A JP58155136 A JP 58155136A JP 15513683 A JP15513683 A JP 15513683A JP S6342689 B2 JPS6342689 B2 JP S6342689B2
- Authority
- JP
- Japan
- Prior art keywords
- cam follower
- cooling
- edge
- hardening
- cam
- 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
Links
- 238000001816 cooling Methods 0.000 claims description 20
- 229910001018 Cast iron Inorganic materials 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005256 carbonitriding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/30—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for crankshafts; for camshafts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
【発明の詳細な説明】
本発明は、内燃機関の弁を制御するためにカム
によつて操作されるカム従動体、例えば揺れ腕又
は類似のものの摩耗にさらされる表面区分を再溶
解焼入れする際に前記表面区分の縁部を冷却する
ための装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for remelting and hardening surface sections exposed to wear of cam followers, such as rocker arms or the like, operated by cams for controlling valves of internal combustion engines. and a device for cooling the edges of said surface section.
従来内燃機関の弁を制御するためのカム従動体
は鋼又は鋳鉄から製作されていてかつ少なくとも
摩耗にさらされる表面範囲に焼入れ層を備えてい
た。このばあい焼入れは一般に誘導加熱し、次い
で空気又は水で急冷（変態硬化又は析出硬化）す
ることによつて又は化学的な組成を変える熱処
理、例えば浸炭窒化処理によつて行なわれた。 Conventionally, cam followers for controlling the valves of internal combustion engines have been made of steel or cast iron and provided with a hardening layer, at least in the surface area exposed to wear. Hardening in this case was generally carried out by induction heating followed by rapid cooling in air or water (transformation hardening or precipitation hardening) or by heat treatments that change the chemical composition, such as carbonitriding.
最近では、摩耗にさらされる表面区分でテイグ
（TIG）溶接機によつて再溶解焼入れされる鋳鉄
製の従動アームを使用するように推移して来てい
る。それというのもレーデブライト層が申し分の
ない滑り特性を有しているからである。従動アー
ムの摩耗にさらされる表面全体に亘つて耐摩耗性
を高めるために、再溶解焼入れ帯域は従動アーム
の焼入れしようとする表面区分の縁部のできるだ
け近くまで設ける必要がある。しかしながらこの
ばあい再溶解焼入れされた表面区分が著しくゆが
むという問題が生じた。更に所望の寸法を得るた
めに次いで行なう必要のある研削加工によつて焼
入れされた表面帯域の一部が削り落された。 More recently, there has been a shift toward the use of cast iron follower arms that are remelted and hardened by a TIG welder in the surface sections exposed to wear. This is because the ledebrite layer has excellent sliding properties. In order to increase the wear resistance over the entire wear-exposed surface of the driven arm, the remelt hardening zone should be provided as close as possible to the edge of the surface section of the driven arm to be hardened. However, the problem arose in this case that the remelt-hardened surface sections were significantly distorted. In addition, part of the hardened surface zone was removed by the grinding process that had to be carried out subsequently to obtain the desired dimensions.
本発明の課題は、焼入れ時のカム従動体のゆが
みおよび焼入れ帯域における焼入れ中のひび割れ
が防止され更に必要な研削量がわずかに維持され
るような冒頭に述べた形式の装置を提供すること
にある。 The object of the invention is to provide a device of the type mentioned at the outset, in which distortions of the cam follower during hardening and cracking during hardening in the hardening zone are prevented and, moreover, the required grinding amount is kept low. be.
前記課題は本発明の第１番目の発明によれば、
カム従動体の再溶解焼入れされる表面上で縁部を
狭幅範囲でおおう水冷式の冷却ジヨーが設けられ
ていることによつて解決された。 According to the first aspect of the present invention, the problem is solved by:
The solution is that a water-cooled cooling jaw is provided which covers the edges in a narrow area on the remelt-hardened surface of the cam follower.
更に前記課題は本発明の第２番目の発明によれ
ば、防護しようとする縁部に沿つて狭幅範囲でカ
ム従動体の側壁に圧着可能な水冷式の冷却ジヨー
が設けられていることによつて解決された。 Furthermore, according to the second aspect of the present invention, the above-mentioned problem can be solved by providing a water-cooled cooling jaw that can be pressed against the side wall of the cam follower in a narrow range along the edge to be protected. It was then resolved.
本発明による装置はカム従動体の再溶解焼入れ
される表面区分において狭幅範囲で縁部を強烈に
冷却することによつて一方ではゆがみがかつ他方
では焼入れ中のひび割れ形成が防止され、更に第
１番目の構成では縁部が再溶解電極から防護され
る。 The device according to the invention prevents distortions on the one hand and crack formation during hardening on the other hand by intensely cooling the edges in a narrow range in the remelt-hardened surface section of the cam follower, and also prevents the formation of cracks during hardening. In the first configuration, the edges are protected from remelting electrodes.
特に銅から成る水冷式の冷却ジヨーはカム従動
体の再溶解焼入れされる表面上で上側縁部範囲を
縁部に沿つて狭幅区分でおおうか又は防護しよう
とする縁部の狭幅な縁部範囲で側壁に圧着され
る。このようにしてカム従動体の摩耗にさらされ
る表面区分に狭幅で再溶解焼入れされない縁部範
囲のみが生じひいては焼入れ帯域の可能な最大幅
が得られる。 A water-cooled cooling gear, in particular made of copper, covers or protects the upper edge area with a narrow section along the edge on the remelt-hardened surface of the cam follower. It is crimped to the side wall in the area. In this way, only a narrow, non-remelt-hardened edge region is created in the wear-exposed surface section of the cam follower, and thus the maximum possible width of the hardened zone is obtained.
次に図示の実施例につき本発明を説明する。 The invention will now be explained with reference to the illustrated embodiment.
カム従動体１の摩耗にさらされる表面にはテイ
グ（TIG）溶接バーナ２によつて再溶解焼入れ帯
域３が形成される。 A TIG welding burner 2 forms a remelt hardening zone 3 on the wear-exposed surface of the cam follower 1 .
第１図による実施例では水冷式の冷却ジヨー４
はカム従動体１の縁部７に沿つて再溶解焼入れさ
れる表面に載設されていてかつ狭幅な縁部範囲８
をおおつている。冷却ジヨー４内の冷却通路は符
号９で示されている。 In the embodiment according to FIG.
along the edge 7 of the cam follower 1 rests on the surface to be remelted and hardened and has a narrow edge area 8
is covered. Cooling passages within the cooling jaw 4 are designated by the reference numeral 9.
第２図による実施例では冷却ジヨー４′は縁部
７からのびる狭幅範囲８′でカム従動体１の側壁
６に圧着されていてかつ前記縁部範囲から熱を排
出するので、該縁部範囲は溶解されない。 In the embodiment according to FIG. 2, the cooling jaw 4' is pressed against the side wall 6 of the cam follower 1 in a narrow area 8' extending from the edge 7 and removes heat from said edge area, so that The range is not dissolved.
冷却ジヨー４は、該冷却ジヨーが焼入れ帯域全
体に亘つてのびるように又は短かい区分だけおお
つてかつテイグ（TIG）溶接バーナ２と一緒に動
くように構成できる。 The cooling jaw 4 can be configured so that it extends over the entire hardening zone or only covers short sections and moves together with the TIG welding burner 2.
図面は本発明の実施例を示すものであつて、第
１図はカム従動体の縁部の冷却形式を示した横断
面図、第２図は別の冷却形式を示した横断面図で
ある。
１……カム従動体、２……テイグ溶接バーナ、
３……再溶解焼入れ帯域、４，４′……冷却ジヨ
ー、６……側壁、７……縁部、８……縁部範囲、
８′……狭幅範囲、９……冷却通路。
The drawings show an embodiment of the present invention, in which FIG. 1 is a cross-sectional view showing a type of cooling of the edge of the cam follower, and FIG. 2 is a cross-sectional view showing another type of cooling. . 1...Cam driven body, 2...Teig welding burner,
3... Remelting and quenching zone, 4, 4'... Cooling jaw, 6... Side wall, 7... Edge, 8... Edge range,
8'...Narrow width range, 9...Cooling passage.
Claims (1)
操作される鋳鉄製のカム従動体の摩耗にさらされ
る表面区分を再溶解焼入れする際に前記表面区分
の縁部を冷却するための装置において、カム従動
体１を再溶解焼入れされる表面上で縁部７を狭幅
範囲８でおおう水冷式の冷却ジヨー４が設けられ
ていることを特徴とする再溶解焼入れの際にカム
従動体の縁部を冷却するための装置。 ２ 内燃機関の弁を制御するためにカムによつて
操作される鋳鉄製のカム従動体の摩耗にさらされ
る表面区分の再溶解焼入れする際に前記表面区分
の縁部を冷却するための装置において、防護しよ
うとする縁部７に沿つて狭幅範囲８′でカム従動
体１の側壁６に圧着可能な水冷式の冷却ジヨー４
が設けられていることを特徴とする再溶解焼入れ
の際にカム従動体の縁部を冷却するための装置。Claims: 1. During remelting and hardening of a surface section exposed to wear of a cast iron cam follower operated by a cam for controlling the valves of an internal combustion engine, the edges of said surface section are The apparatus for cooling the cam follower 1 is provided with a water-cooled cooling jaw 4 that covers the edge 7 in a narrow area 8 on the surface to be remelted and quenched. A device for cooling the edge of the cam follower during operation. 2. In a device for cooling the edges of a surface section exposed to wear during remelting and hardening of a cast iron cam follower operated by a cam for controlling the valves of an internal combustion engine. , a water-cooled cooling jaw 4 which can be pressed onto the side wall 6 of the cam follower 1 in a narrow region 8' along the edge 7 to be protected.
A device for cooling an edge of a cam follower during remelting and hardening, characterized in that:
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3231774.3 | 1982-08-26 | ||
| DE19823231774 DE3231774C1 (en) | 1982-08-26 | 1982-08-26 | Device for cooling the edges during remelt hardening of cam followers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5959830A JPS5959830A (en) | 1984-04-05 |
| JPS6342689B2 true JPS6342689B2 (en) | 1988-08-25 |
Family
ID=6171760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15513683A Granted JPS5959830A (en) | 1982-08-26 | 1983-08-26 | Device for cooling cam inverted body hem on remelt quenching |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5959830A (en) |
| DE (1) | DE3231774C1 (en) |
| FR (1) | FR2532328B1 (en) |
| GB (1) | GB2125832B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5980723A (en) * | 1982-11-01 | 1984-05-10 | Mitsubishi Motors Corp | White pig iron hardening device for sliding surface of cam |
| JPH0737660B2 (en) * | 1985-02-21 | 1995-04-26 | トヨタ自動車株式会社 | Improved treatment method of cylinder head for internal combustion engine made of cast aluminum alloy |
| JPS61246320A (en) * | 1985-03-01 | 1986-11-01 | Toyota Motor Corp | Manufacture of remelted and chilled camshaft |
| DE3916684A1 (en) * | 1989-05-23 | 1990-11-29 | Opel Adam Ag | Re-melting surface hardening process esp. for cam shaft or drag lever - has central and border regions heated at different times or using geometrical displacement to minimise surface deformation |
| DE4205801C1 (en) * | 1992-02-26 | 1993-07-15 | Aeg-Elotherm Gmbh, 5630 Remscheid, De | |
| DE4224264C1 (en) * | 1992-07-23 | 1993-06-09 | Aeg-Elotherm Gmbh, 5630 Remscheid, De | Remelting of workpiece surface - by reducing carbon@ content in parts where remelting will not occur and directing an arc, electron, plasma or laser beam onto the surface |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR807429A (en) * | 1935-06-20 | 1937-01-12 | Ig Farbenindustrie Ag | Process for surface hardening of metal parts and equipment specific to the execution of this process |
| GB502152A (en) * | 1936-09-10 | 1939-03-10 | Werner Theodor Schaurte | Process of and apparatus for effecting local hardening of mass-production articles |
| DE2232124A1 (en) * | 1972-06-30 | 1974-01-10 | Daimler Benz Ag | Surface hardening - eg of rotary piston surfaces for increased resistan-ce to wear and tear, by charge carrier treatment |
| DE2742597C3 (en) * | 1977-09-22 | 1980-02-07 | Audi Nsu Auto Union Ag, 7107 Neckarsulm | Camshaft for piston engines and work machines, preferably reciprocating internal combustion engines |
-
1982
- 1982-08-26 DE DE19823231774 patent/DE3231774C1/en not_active Expired
-
1983
- 1983-08-05 GB GB08321205A patent/GB2125832B/en not_active Expired
- 1983-08-23 FR FR8313588A patent/FR2532328B1/en not_active Expired
- 1983-08-26 JP JP15513683A patent/JPS5959830A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3231774C1 (en) | 1983-04-07 |
| GB2125832B (en) | 1985-12-11 |
| FR2532328B1 (en) | 1986-03-21 |
| FR2532328A1 (en) | 1984-03-02 |
| JPS5959830A (en) | 1984-04-05 |
| GB8321205D0 (en) | 1983-09-07 |
| GB2125832A (en) | 1984-03-14 |
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