JPS61259848A - Formation of differential gear case for automobile - Google Patents
Formation of differential gear case for automobileInfo
- Publication number
- JPS61259848A JPS61259848A JP60100160A JP10016085A JPS61259848A JP S61259848 A JPS61259848 A JP S61259848A JP 60100160 A JP60100160 A JP 60100160A JP 10016085 A JP10016085 A JP 10016085A JP S61259848 A JPS61259848 A JP S61259848A
- Authority
- JP
- Japan
- Prior art keywords
- differential gear
- gear case
- pressure
- forming
- water pressure
- 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.)
- Pending
Links
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- Retarders (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は自動車用ディファレンシャルギアケースの成形
方法、さらに詳しくはディファレンシャルギアを組込ん
で装着するためのギアケースの成形方法の改良に関する
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for molding a differential gear case for an automobile, and more particularly to an improvement in a method for molding a gear case for incorporating and mounting a differential gear.
、 （従来の技術）
従来、この種ディファレンシャルギアケースの成形方法
としては、鋳造による成形方法、或いは第５図（イ）に
示すように２枚の板上の加工素材１５ｂ、 １５ｂを同
図（ロ）のようにプレス加工するとともに必要に応じて
同図（ハ）のように切欠１９ｂを形成すべく打抜き加工
し、その後プレス加工等の施された加工素材１５ｂの接
合部２１．２１を溶接して同図（ニ）のようなギアケー
ス２０ｂを成形する方法がある。(Prior Art) Conventionally, this type of differential gear case has been formed by casting, or by forming two processed materials 15b on two plates as shown in FIG. In addition to press working as shown in (b), punching is performed to form a notch 19b as shown in (c) of the same figure as required, and then welding is performed on the joint portion 21.21 of the processed material 15b that has been subjected to press working, etc. There is a method of molding a gear case 20b as shown in FIG.
（発明が解決しようとする問題点）
しかしながら前者の成形方法に於いては、熔融材料が固
化するまでに時間を要する等作業能率が悪く、又鋳造後
の砂落し、バリトリ等の作業が面倒である等の欠点があ
る。(Problems to be solved by the invention) However, in the former molding method, work efficiency is poor as it takes time for the molten material to solidify, and work such as sand removal and deburring after casting is troublesome. There are some drawbacks.
又、後者の成形方法に於いては、ディファレンシャルギ
アケースが左右に湾曲し且つ中央が膨出しているという
特殊な形態なる故、プレス加工自体が煩雑になるととも
に、プレス加工後に溶接作業が必要となるため全体の作
業が非常に煩雑で且つ多大な作業時間やコストを要して
いた。しかもこの後者の成形方法においては、溶接作業
が必要であるために成形後の製品の強度が不均一となり
且つ溶接箇所の気密性が不良になるおそれがある他、製
品の品質にバラつきが生じ易いという問題点があった。In addition, in the latter forming method, since the differential gear case has a special shape in which it is curved left and right and has a bulge in the center, the pressing process itself is complicated and welding work is required after the pressing process. Therefore, the entire work is extremely complicated and requires a large amount of work time and cost. In addition, this latter forming method requires welding, which may result in uneven strength of the product after forming, poor airtightness at the welded area, and variations in product quality. There was a problem.
いずれにしても従来では上記のような成形方法によって
成形されていたために、作業が非常に煩雑であり、多大
な作業時間、製造コストを要することとなっていたので
ある。In any case, since conventional molding methods have been used as described above, the work is extremely complicated, requiring a large amount of work time and manufacturing cost.
本発明はこのような問題点をすべて解決するために、特
に上記のような溶接作業を不要にするという観点から、
加工゛素材として従来のギアケースの成形方法では到底
加工し得ないパイプ状の加工素材を使用するという点に
着眼してなされたもので、成形が極めて短時間に且つ非
常に容易に行なえ、全体としての作業の自動化、大量生
産化を可能ならしめることを口約とするものである。In order to solve all of these problems, the present invention has the following features:
This was done by focusing on using a pipe-shaped material that cannot be processed using conventional gear case molding methods, and the molding can be done extremely quickly and easily, making the overall It is a promise to automate work and make mass production possible.
（問題点を解決するための手段）
そして本発明の上記問題点を解決するための手段は、パ
イプ状の加工素材を予めディファレンシャルギアケース
の形状に応じて形成された金型内に設置し、次に該金型
内と連通すべく別途設けられた液圧発生装置により瞬間
的に発生する高圧状態の液圧を前記加工素材の中空部内
に流入せしめて該加工素材の略中央部を膨出させ、その
後、膨出した加工素材の中央部の両側面にディファレン
シャルギア挿入用の孔を打抜き形成して成形する成形方
法にある。(Means for Solving the Problems) A means for solving the above-mentioned problems of the present invention is to place a pipe-shaped processed material in a mold previously formed according to the shape of the differential gear case, Next, high-pressure liquid pressure, which is instantaneously generated by a hydraulic pressure generating device separately provided to communicate with the inside of the mold, is caused to flow into the hollow part of the workpiece to bulge out the approximate center of the workpiece. Thereafter, a hole for inserting a differential gear is formed by punching on both sides of the bulged center part of the processed material.
（作用）
すなわちこのような成形方法なるために、従来の成形方
法では加工が困難であったパイプ状の加工素材を使用す
るにもかかわらず、前記瞬間的に発生する液圧を加工素
材の中空部内に流入せしめることによってその加工素材
の略中央部を極めて容易に膨出させることができ、その
後膨出した略中央部の両側面を打抜き形成することによ
り、所望形状のディファレンシャルギアケースが極めて
短時間に且つ非常に容易に成形されることとなるのであ
る。(Function) In other words, in order to use this molding method, even though a pipe-shaped material is used, which is difficult to process using conventional molding methods, the instantaneous hydraulic pressure is applied to the hollow part of the material. By allowing the processed material to flow into the section, it is possible to bulge out the approximately central part of the processed material very easily, and then by punching out both sides of the bulging approximately central part, a differential gear case with the desired shape can be made extremely short. It can be molded in a short time and very easily.
（実施例）
以下、本発明の実施態様について図面に示した一実施例
に従って説明する。(Example) Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.
第１図は一実施例としてのディファレンシャルギアケー
スの成形工程の一部切欠正面図並びに正面図、第２図は
ギアケースを成形するために成形装置の概略断面図、第
３図は同要部拡大断面図である。Fig. 1 is a partially cutaway front view and a front view of the forming process of a differential gear case as an example, Fig. 2 is a schematic sectional view of a forming device for forming the gear case, and Fig. 3 is the same main part. It is an enlarged sectional view.
先ず、ギアケースの成形方法を説明するにあたり、その
成形方法に使用される一実施例としての成形装置の概略
について説明すると、この成形装置は第２図に示すよう
に水圧発生装置ｌと、成形加工装置２とで構成されてい
る。First, in explaining the gear case molding method, an outline of a molding device as an example used in the molding method will be explained.As shown in Fig. 2, this molding device includes a water pressure generator l and a molding It is composed of a processing device 2.
３．４は外部の減圧弁５の調整により空気溜６から前記
水圧発生装置１のシリンダ７内に圧縮空気を送り込むた
めの給気弁及び締切弁８は該締切弁４の直下に設けられ
たハンマで下部にプランジャ９が設けられている。１０
は前記シリンダ７の下部に設けられた水圧室、１１は該
水圧室１０内に給水するための給水弁、１２は該水圧室
１０の下部に設けられた副ハンマを示す。3.4, an air supply valve and a shutoff valve 8 are provided directly below the shutoff valve 4 for sending compressed air from the air reservoir 6 into the cylinder 7 of the water pressure generator 1 by adjusting the external pressure reducing valve 5. A plunger 9 is provided at the bottom of the hammer. 10
11 is a water supply valve for supplying water into the water pressure chamber 10, and 12 is a sub hammer provided at the bottom of the water pressure chamber 10.
１３は前記成形加工装置２内に設けられた金型で、その
内部は水路１４を介、して前記水圧室１０に連通されて
なり、且つ成形すべきディファレンシャルギア用カバ一
体の形状に応じて中央部が凹状に形成されてなる。Reference numeral 13 denotes a mold provided in the molding device 2, the inside of which is communicated with the water pressure chamber 10 via a waterway 14, and is molded according to the shape of the integral differential gear cover to be molded. The central part is formed into a concave shape.
次にこのような成形装置にてディファレンシャルギア用
カバ一体を成形する成形方法について説明すると、先ず
第１図（イ）に示すような炭素鋼からなるパイプ状の加
工素材１５を、第３図（イ）のように該加工素材１５の
中空部１６が前記水路１４と連通ずるよう前記金型１３
内に設置する。Next, to explain the forming method of forming an integral cover for a differential gear using such a forming apparatus, first, a pipe-shaped processed material 15 made of carbon steel as shown in FIG. The mold 13 is arranged so that the hollow part 16 of the processed material 15 communicates with the water channel 14 as shown in b).
Installed inside.
次にこのようにして加工素材１５を設置した状態で水圧
発生装置を作動させる。すなわち減圧弁５にて調整され
た圧縮空気を給気弁３．締切弁４を介してシリンダ７内
に流入すると、その圧縮空気は締切弁４の作用で自動的
に膨張しながら前記ハンマ８を下向きに加速させ、その
ハンマ８の下部のプランジャ９が水圧室１０内の水を高
速度で瞬間的に圧縮し、それによって高圧状態の水圧が
瞬間的に発生することとなる。又これと同時に副ハンマ
１２が上向きに加速し、上下からの圧縮により水圧室１
０内の水が水路１４を通って成形加工装置２の金型１３
内に送られ、前記高圧状態の水圧によって金型１３内に
設置された加工素材１５の略中央部が第３図（ロ）のよ
うに膨出されて第１図（ロ）の如き膨出部１７が形成さ
れることとなる。Next, with the processed material 15 installed in this manner, the water pressure generator is operated. That is, the compressed air adjusted by the pressure reducing valve 5 is transferred to the air supply valve 3. When the compressed air flows into the cylinder 7 through the shutoff valve 4, the compressed air automatically expands under the action of the shutoff valve 4 and accelerates the hammer 8 downward, causing the plunger 9 at the bottom of the hammer 8 to move into the hydraulic chamber 10. The water inside is compressed instantaneously at high speed, which instantly generates high water pressure. At the same time, the secondary hammer 12 accelerates upward, and the hydraulic chamber 1 is compressed from above and below.
0 passes through the water channel 14 to the mold 13 of the molding device 2.
The substantially central part of the processed material 15 placed in the mold 13 is bulged as shown in FIG. A portion 17 will be formed.
そしてこのようにして加工素材１５に膨出部１７が形成
された後、さらに加工素材１５の中空部１６内に水圧を
充填し、水圧を破壊状態にすると内圧が急激に上昇し、
それによって前記膨出部１７の両側面に第１図（ハ）の
ように孔１８．１８が打凄き形成されることとなる。After the bulge 17 is formed in the workpiece 15 in this way, the hollow part 16 of the workpiece 15 is further filled with water pressure, and when the water pressure is brought to a destructive state, the internal pressure rises rapidly.
As a result, holes 18 and 18 are formed in both sides of the bulging portion 17, as shown in FIG. 1(C).
このようにして孔１８．１８を形成した後、その孔１８
、１８の対面する周縁に切欠１９．１９を形成すること
によって所望形状のディファレンシャルギアケース２０
が成形されることとなるのである。After forming the hole 18.18 in this way, the hole 18.
, 18 are formed with notches 19 and 19 on the facing edges of the differential gear case 20 to have a desired shape.
will be formed.
このように上記実施例では圧縮空気の原動力により瞬間
的に発生する水圧を金型内に設置されたパイプ状の加工
素材１５の中空部１６内に流入せしめることによりその
略中央部を容易に膨出させることができ、その後水圧に
よって膨出部１７の両側面に孔Ｉ８を打抜き形成するこ
とにより、全体としてカバ一体２０の成形が極めて短時
間に且つ非常に容易に行なうことが可能となったのであ
る。In this way, in the above embodiment, water pressure instantaneously generated by the motive force of compressed air is allowed to flow into the hollow part 16 of the pipe-shaped workpiece 15 installed in the mold, thereby easily expanding the substantially central part of the workpiece 15. By punching holes I8 on both sides of the bulging portion 17 using water pressure, the entire cover 20 can be molded in a very short time and very easily. It is.
尚、カバ一体２０の成形工程としては上記のように加工
素材１５の設置、水圧による膨出部１７の形成、水圧に
よる孔１８の打抜き形成、切欠１９の形成からなる工程
にかぎられるものではなく、例えば第４図のように膨出
部１７を形成する前に同図（ロ）のごとく加工素材１５
の両端部１５ａ、 １５ａを絞り加工してもよい。この
絞り加工は、加工素材１５が伸び率の低い素材で構成さ
れている場合に特に効果的である。又、膨出部１７の形
成後、孔１８を形成する前に加工素材１５を必要に応じ
て焼鈍しする工程を含むことも可能である。It should be noted that the process of forming the integral cover 20 is not limited to the steps described above, including placing the processed material 15, forming the bulge 17 using water pressure, punching holes 18 using water pressure, and forming the notches 19. For example, before forming the bulge 17 as shown in FIG. 4, the processed material 15 is
Both end portions 15a, 15a may be drawn. This drawing process is particularly effective when the processed material 15 is made of a material with a low elongation rate. It is also possible to include a step of annealing the processed material 15 as necessary after forming the bulge 17 and before forming the hole 18.
さらに該実施例では孔１８の打抜き形成を水圧によって
行なっているため、その作業を極めて容易且つ短時間に
行なうことができるという好ましい利点を得たが、孔１
８を形成するための手段は決してこれに限定されるもの
ではな（、たとえばプレス加工等によって打抜き形成し
てもよい。Furthermore, in this embodiment, the holes 18 are punched and formed using water pressure, which has the advantage that the work can be done extremely easily and in a short time.
The means for forming 8 is by no means limited to this; for example, it may be formed by punching by pressing or the like.
さらに該実施例では液圧を発生させる手段として、圧縮
特性、経済性、取扱いの容易さ等が優れている点から水
が使用されているが、水辺外の液体によって液圧を発生
させることも可能である。Further, in this embodiment, water is used as a means for generating hydraulic pressure because of its excellent compression properties, economical efficiency, and ease of handling, but it is also possible to generate hydraulic pressure using liquid outside the waterside. It is possible.
尚、液圧を発生させる液圧発生装置の構造も決して該実
施例に限定されるものではなく、要は加工素材１５を設
置するための金型１３と連通する液圧発生装置から瞬間
的に発生する高圧状態の液圧を加工素材１５の中空部１
６内に送り込まれればよく、装置の構造等は決して問わ
ない。Incidentally, the structure of the hydraulic pressure generating device that generates hydraulic pressure is by no means limited to this embodiment, and in short, the structure of the hydraulic pressure generating device that generates hydraulic pressure is not limited to the above embodiment, and the point is that the hydraulic pressure generating device that communicates with the mold 13 for placing the processed material 15 can be The generated high-pressure liquid pressure is transferred to the hollow part 1 of the processing material 15.
6, and the structure of the device does not matter.
さらに加工素材１５の材質も該実施例の炭素鋼に躍らず
、たとえばステンレス鋼、アルミニウム、銅合金等のも
のであってもよく、その材質は決して問わない。要は加
工素材１５がパイプ状のものであればよい。Furthermore, the material of the processed material 15 is not limited to the carbon steel of the embodiment, and may be stainless steel, aluminum, copper alloy, etc., and the material is not particularly limited. In short, it suffices if the processed material 15 is pipe-shaped.
（発明の効果）
叙上のように本発明は、パイプ状の加工素材の金型内に
設置し、その金型内部と連通して設けられた液圧発生装
置により瞬間的に発生する高圧状態の液圧を加工素材の
中空部内に流入せしめて該加工素材の略中央部を膨出さ
せ、その後、膨出した中央部の両側面に孔を打抜き形成
してディファレンシャルギアケースを成形する方法なる
ため、すなわち瞬間的に発生する液圧を利用した成形方
法なるため、従来の鋳造やプレス加工による成形方法に
比べて成形に要する作業時間を著しく短縮することがで
き、且つその作業が著しく容易になり、作業の自動化、
大量生産化が可能になるという格別顕著な効果を有する
に至った。(Effects of the Invention) As described above, the present invention provides a high pressure state that is instantaneously generated by a hydraulic pressure generating device that is installed in a mold for a pipe-shaped processed material and communicated with the inside of the mold. A method of flowing liquid pressure into the hollow part of the processed material to bulge out the approximate center of the processed material, and then punching holes on both sides of the bulged center to form a differential gear case. In other words, since it is a molding method that utilizes instantaneously generated hydraulic pressure, the working time required for molding can be significantly shortened compared to conventional molding methods using casting or press working, and the work is significantly easier. automation of work,
This has had the particularly remarkable effect of making mass production possible.
さらに上記のような液圧利用によりパイプ状の加工素材
をそのまま使用して成形できるため従来特に問題となっ
ていたプレス加工における溶接作業が全く不要となり、
これが作業性の向上に大幅に寄与することとなる他、溶
接作業が不要なるため、成形後の製品の強度が均一とな
り、且つ気密性を損なうこともなく、しかも成形後の製
品の品質にバラつきを生じさせないという利点がある。Furthermore, by using hydraulic pressure as described above, pipe-shaped processed materials can be used as they are to be formed, eliminating the need for welding during press processing, which was a particular problem in the past.
This greatly contributes to improving workability, and since no welding work is required, the strength of the product after molding is uniform, and there is no loss of airtightness, and there is no variation in the quality of the product after molding. It has the advantage of not causing
さらに上記のようなディフルンシャルギアケースを成形
するにあたり、たとえば両端からの押し込み成形の方法
によると、ギアケースの中央膨出部の両側部が比較的長
い場合に、材料が中央部に十分補給されず、成形がうま
く行なえないのに対し、本発明のような衝撃液圧、すな
わち瞬間的に発生する高圧状態の液圧を利用する方法に
よると、上記中央膨出部の両側部の長さが長くなっても
何ら支障なく成形できるのである。Furthermore, when molding a differential gear case like the one described above, for example, if the two sides of the central bulge of the gear case are relatively long, the material can be sufficiently supplied to the central part. On the other hand, according to the method of the present invention that uses impact liquid pressure, that is, instantaneously generated high-pressure liquid pressure, the length of both sides of the central bulge is Even if the length becomes long, it can be molded without any problems.
その他、作業工数や製造コストを従来に比べて。In addition, compared to conventional work man-hours and manufacturing costs.
大幅に低減できるという実益がある。There is a practical benefit in that it can be significantly reduced.
第１図は一実施例としてのディファレンシャルギアケー
スの成形工程を示し、（イ）は加工素材の一部切欠正面
図、（ロ）は液圧による膨出部形成工程の一部切欠正面
図、（ハ）は孔形成工程の正面図、（ニ）は切欠形成工
程の正面図をそれぞれ示す。
第２図はギアケースを成形するための成形装置の概略断
面図。
第３図は同要部拡大断面図で、（イ）は加工素材の設置
状態、（ロ）は液圧流人状態をそれぞれ示す。
第４図は他実施例の成形工程の正面図を示し、（イ）は
加工素材、（ロ）は絞り加工工程、（ハ）は膨出部形成
時をそれぞれ示す。
第５図は従来の成形方法を示す斜視図で、（イ）は加工
素材、（ロ）はプレス形成工程、（ハ）は切欠形成工程
、（ニ）は溶接工程をそれぞれ示す。
１３・・・金型 １５・・・加工素材１６
・・・中空部 １７・・・膨出部１８・・・
孔FIG. 1 shows the forming process of a differential gear case as an example, in which (a) is a partially cutaway front view of the processed material, (b) is a partially cutaway front view of the process of forming a bulge using hydraulic pressure, (c) shows a front view of the hole forming step, and (d) shows a front view of the notch forming step. FIG. 2 is a schematic cross-sectional view of a molding device for molding a gear case. FIG. 3 is an enlarged cross-sectional view of the same main part, where (a) shows the installed state of the processing material and (b) shows the state of hydraulic flow. FIG. 4 shows a front view of the forming process of another embodiment, in which (a) shows the processed material, (b) shows the drawing process, and (c) shows the time of forming the bulge. FIG. 5 is a perspective view showing a conventional forming method, in which (a) shows the processed material, (b) shows the press forming process, (c) shows the notch forming process, and (d) shows the welding process. 13... Mold 15... Processing material 16
...Hollow part 17...Bulging part 18...
hole
Claims (1)
ギアケースの形状に応じて形成された金型１３内に設置
し、次に該金型１３内と連通すべく別途設けられた液圧
発生装置により瞬間的に発生する高圧状態の液圧を前記
加工素材１５の中空部１６内に流入せしめて該加工素材
１５の略中央部を膨出させ、その後、膨出した加工素材
１５の中央部の両側面にディファレンシャルギア挿入用
の孔１８、１８を打抜き形成して成形することを特徴と
する自動車用ディファレンシャルギアケースの成形方法
。 ２、前記孔１８の打抜き形成が、前記瞬間的に発生する
液圧によって行なわれる特許請求の範囲第１項記載の自
動車用ディファレンシャルギアケースの成形方法。 ３、前記加工素材１５が炭素鋼からなる特許請求の範囲
第１項又は第２項記載の自動車用ディファレンシャルギ
アケースの成形方法。[Scope of Claims] 1. A pipe-shaped processed material 15 is placed in a mold 13 formed in advance according to the shape of the differential gear case, and then a pipe is separately provided to communicate with the inside of the mold 13. A high-pressure liquid pressure instantaneously generated by a hydraulic pressure generating device is caused to flow into the hollow portion 16 of the workpiece 15 to bulge approximately the center of the workpiece 15, and then the bulged workpiece 15 is A method for molding a differential gear case for an automobile, characterized in that holes 18, 18 for inserting a differential gear are formed by punching on both sides of a central portion of the case. 2. The method of forming a differential gear case for an automobile according to claim 1, wherein the hole 18 is punched and formed by the instantaneously generated hydraulic pressure. 3. The method for forming a differential gear case for an automobile according to claim 1 or 2, wherein the processed material 15 is made of carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60100160A JPS61259848A (en) | 1985-05-10 | 1985-05-10 | Formation of differential gear case for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60100160A JPS61259848A (en) | 1985-05-10 | 1985-05-10 | Formation of differential gear case for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61259848A true JPS61259848A (en) | 1986-11-18 |
Family
ID=14266562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60100160A Pending JPS61259848A (en) | 1985-05-10 | 1985-05-10 | Formation of differential gear case for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61259848A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5515341A (en) * | 1978-07-17 | 1980-02-02 | Watanabe Press Kogyo Kk | Method of producing frame rack for bicycle |
| JPS56136245A (en) * | 1980-03-28 | 1981-10-24 | Bridgestone Cycle Co | Formation of frame pipe for bicycle |
-
1985
- 1985-05-10 JP JP60100160A patent/JPS61259848A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5515341A (en) * | 1978-07-17 | 1980-02-02 | Watanabe Press Kogyo Kk | Method of producing frame rack for bicycle |
| JPS56136245A (en) * | 1980-03-28 | 1981-10-24 | Bridgestone Cycle Co | Formation of frame pipe for bicycle |
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