JPH0623448A - Manufacture of press die - Google Patents
Manufacture of press dieInfo
- Publication number
- JPH0623448A JPH0623448A JP21432192A JP21432192A JPH0623448A JP H0623448 A JPH0623448 A JP H0623448A JP 21432192 A JP21432192 A JP 21432192A JP 21432192 A JP21432192 A JP 21432192A JP H0623448 A JPH0623448 A JP H0623448A
- Authority
- JP
- Japan
- Prior art keywords
- hardness
- welding
- cladding
- die
- machining
- 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
Landscapes
- Punching Or Piercing (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ワーク加工用のエッジ
部又は強圧部を有するプレス金型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 press die having an edge portion or a high pressure portion for working a work.
【０００２】[0002]
【従来の技術】プレス金型の内、例えば板状ワークを所
定形状にトリミング加工するトリミング金型の場合に
は、該トリミング金型の所定位置にトリミング加工する
ためのエッジ部であるトリミング刃が設けられている。
このトリミング刃は耐久性等の要請から該金型の他の部
分より硬度が高くなければならない。そこで、金型素材
の所定のエッジ部をトリミング刃の形状に成形した後、
該成形部分をフレームハード等の熱処理により焼き入れ
し硬度を上げトリミング刃としていた。ところが金型の
材料は必ずしもこのような熱処理に適しておらず、フレ
ームハード等の熱処理を施しても所望する硬度が得られ
なかったり焼き割れ等の不具合が生じるおそれがあっ
た。そこで、金型素材のトリミング刃形成部分を削除
し、該削除された部分にＪＩＳ Ｚ３２５１等に示され
る硬化肉盛り用溶接材料を溶接肉盛りし、その後該肉盛
り部分をトリミング刃形状に機械加工しトリミング刃を
形成する方法が行われている。2. Description of the Related Art Among press dies, for example, in the case of a trimming die for trimming a plate-shaped work into a predetermined shape, a trimming blade which is an edge portion for trimming at a predetermined position of the trimming die is used. It is provided.
The trimming blade must have higher hardness than the other parts of the mold in order to meet the requirements of durability and the like. Therefore, after molding the predetermined edge part of the mold material into the shape of the trimming blade,
The formed portion was hardened by heat treatment with a frame hard or the like to increase the hardness and used as a trimming blade. However, the material of the mold is not always suitable for such heat treatment, and there is a possibility that a desired hardness may not be obtained or a defect such as a quench crack may occur even if heat treatment such as frame hard is performed. Therefore, the trimming blade forming portion of the die material is deleted, a welding material for hardening overlay shown in JIS Z3251, etc. is welded to the removed portion, and then the overlaying portion is machined into a trimming blade shape. A method of forming a trimming blade is used.
【０００３】[0003]
【発明が解決しようとする課題】上記硬化肉盛り用溶接
材料を溶接肉盛りする方法では、肉盛り後熱処理を施さ
なくても所望の硬度が得られるように該硬化肉盛り用溶
接材料の組成が調節されているので、溶接肉盛りした後
に機械加工、特にフライス加工のような断続切削を伴う
機械加工を施すことが困難であり、そのため研削加工に
よらなければならず加工工数が増加するという問題があ
る。即ち、断続切削が可能な硬度はＨRC４５までであ
り、上記溶接材料の溶接後の硬度はＨRC５０以上になる
ため、研削加工を行わざるを得なくなる。尚、溶接肉盛
り後に一旦該肉盛り部分を焼鈍し硬度を下げ機械加工を
行った後に焼き入れし所定の硬度に回復させることも可
能ではあるが、熱処理工程が増加するばかりでなく、熱
処理により金型素材が歪むおそれがあり、そのため焼き
入れ後に研削等の修正加工を行わなければならず工数を
削減することができない。以上の問題は、ベンド金型に
おけるパンチのエッジ部を上記した肉盛り溶接法で形成
する場合や、ドロー金型におけるダイフェースのビード
部やパンチの肩部といったワークを強く加圧する強圧部
を肉盛り溶接法で形成する場合にも生ずる。そこで、本
発明は、プレス金型にワーク加工用のエッジ部又は強圧
部を形成する際に肉盛り溶接後の機械加工が容易で、か
つ修正加工をせずとも所定硬度以上のエッジ部又は強圧
部が得られるプレス金型の製造方法を提供することを目
的とする。SUMMARY OF THE INVENTION In the above-mentioned method of welding and overlaying a hardened welding material for overlay welding, the composition of the welded material for overlay overlay is obtained so that a desired hardness can be obtained without heat treatment after overlaying. Since it is adjusted, it is difficult to perform machining, especially machining with interrupted cutting such as milling, after the weld overlay is built up. There's a problem. That is, the hardness that enables interrupted cutting is up to HRC45, and the hardness of the above welding material after welding is HRC50 or more, so that grinding must be performed. It should be noted that after the weld overlay, it is possible to anneal the overlay once to lower the hardness, perform machining, and then quench to restore the hardness to a predetermined level. Since the die material may be distorted, it is necessary to perform a correction process such as grinding after quenching, and the number of steps cannot be reduced. The above problems are caused when the edge part of the punch in the bend die is formed by the above-mentioned build-up welding method, or the high pressure part that strongly presses the work such as the bead part of the die face or the shoulder part of the punch in the draw die is used. It also occurs when forming by the welding method. Therefore, the present invention is easy to machine after build-up welding when forming an edge portion or a strong pressure portion for work processing in a press die, and an edge portion or a strong pressure of a predetermined hardness or more without correction processing. It is an object of the present invention to provide a method for manufacturing a press die for obtaining parts.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に本発明は、ワーク加工用のエッジ部又は強圧部を有す
るプレス金型の製造方法であって、金型素材の該エッジ
部又は強圧部を形成する部分に肉盛り材料を肉盛り溶接
し、この肉盛り部分をエッジ部又は強圧部の所要の形状
に機械加工するものにおいて、前記肉盛り材料として、
溶接後の硬度がＨRC４５以下となるものを用い、肉盛り
部分の機械加工後にサブゼロ処理を施して肉盛り部分の
硬度を増加させることを特徴とする。In order to achieve the above object, the present invention is a method of manufacturing a press die having an edge portion or a high pressure portion for working a workpiece, the edge portion or the high pressure portion of a die material. The build-up material is welded to the part forming the part, and the build-up part is machined into a desired shape of the edge part or the high pressure part, as the build-up material,
It is characterized by using a material having a hardness of HRC45 or less after welding, and increasing the hardness of the built-up portion by subjecting the built-up portion to a sub-zero treatment after machining.
【０００５】[0005]
【作用】肉盛り溶接した後の肉盛り部分の硬度が切削加
工の限界値であるＨRC４５以下になり、そのため肉盛り
部分を切削加工で容易に機械加工できるようになる。そ
して、機械加工後にサブゼロ処理により肉盛り部分の硬
度を増加させるが、サブゼロ処理は酸化や歪が発生せ
ず、修正加工は不要になる。尚、マルテンサイト変態開
始温度が略１５０℃以下となる肉盛り材料を用いれば、
溶接後の硬度をＨRC４５以下に抑え、サブゼロ処理によ
りＨRC４５を上回る所要の硬度に増加できる。The hardness of the build-up portion after the build-up welding becomes HRC45 or less, which is the limit value of the cutting work, and therefore the build-up portion can be easily machined by the cutting work. Then, although the hardness of the built-up portion is increased by the sub-zero treatment after the machining, the sub-zero treatment does not cause oxidation or distortion, and the correction machining becomes unnecessary. If a build-up material having a martensite transformation start temperature of about 150 ° C. or lower is used,
The hardness after welding can be suppressed to HRC45 or less, and the required hardness exceeding HRC45 can be increased by subzero treatment.
【０００６】[0006]
【実施例】図を参照して、１はトリミング金型であり、
該トリミング金型１のエッジ部にトリミング刃１１を形
成する場合について以下に説明する。まず、鋳造により
トリミング金型１の素材を形成し、次いで該素材のトリ
ミング刃１１を設ける部分を削除し面取り部分１２を設
ける。そして該面取り部分１２に肉盛り材料を図１
（ｂ）に示すごとく３重に肉盛り溶接する。肉盛り材料
のマルテンサイト変態開始温度Ｍsが略１５０℃以下で
あれば、溶接後の肉盛り部分１３の組織中のオーステナ
イトの多くはマルテンサイトに変態せずに残留している
のでその硬度はＨRC４５より低く切削による機械加工を
施すことができる。一方、肉盛り部分１３を図１（ｃ）
のごとくトリミング刃１１の形状に機械加工しただけで
は該トリミング刃１１は十分な硬度を有していないの
で、図１（ｄ）のごとく該トリミング刃１１を枠２で囲
いその中にドライアイスや液体窒素といった冷却剤２１
を充填して十分に冷却し残留オーステナイトをマルテン
サイトに変態させるサブゼロ処理を行い、該トリミング
刃１１の硬度をＨRC４５より硬くする。EXAMPLES Referring to the drawings, 1 is a trimming die,
A case where the trimming blade 11 is formed on the edge portion of the trimming die 1 will be described below. First, the material of the trimming die 1 is formed by casting, and then the portion of the material on which the trimming blade 11 is provided is deleted and the chamfered portion 12 is provided. Then, a padding material is applied to the chamfered portion 12 as shown in FIG.
As shown in (b), triple build-up welding is performed. If the martensite transformation start temperature Ms of the overlay material is approximately 150 ° C. or less, most of the austenite in the structure of the overlay portion 13 after welding remains without being transformed into martensite, and therefore its hardness is HRC45. It can be machined by cutting lower. On the other hand, the padding portion 13 is shown in FIG.
As shown in FIG. 1 (d), the trimming blade 11 does not have sufficient hardness if it is simply machined into the shape of the trimming blade 11 as shown in FIG. Coolant such as liquid nitrogen 21
Is filled and cooled sufficiently to perform a sub-zero treatment for transforming the retained austenite into martensite, and the hardness of the trimming blade 11 is made harder than HRC45.
【０００７】ところで肉盛り材料の組成は、鉄（Ｆe）
に対し百分率で炭素（Ｃ）を０．５〜１．５、珪素（Ｓ
i）０．２〜２．０、マンガン（Ｍn）０．３〜６．０、
クロム（Ｃr）０．３〜１０．０、コバルト（Ｃo）０．
３〜１０．０、その他（モリブデン（Ｍo）バナジウム
（Ｖ））０．２以下とすることが好ましく、この場合下
記の数１により求められるマルテンサイト変態開始温度
Ｍsが略１５０℃以下になるように各成分の添加量を上
記の範囲内で調整する。By the way, the composition of the overlay material is iron (Fe)
% Of carbon (C) and silicon (S
i) 0.2 to 2.0, manganese (Mn) 0.3 to 6.0,
Chromium (Cr) 0.3 to 10.0, cobalt (Co) 0.
3 to 10.0 and others (molybdenum (Mo) vanadium (V)) 0.2 or less are preferable. In this case, the martensite transformation start temperature Ms obtained by the following equation 1 is about 150 ° C. or less. The amount of each component added is adjusted within the above range.
【０００８】 Ｍs＝５５０−３５０×Ｃ−４０×Ｍn−３５×Ｖ−２０×Ｃr −１０×Ｍo＋１５×Ｃo＋０×Ｓi・・・（数１） 尚、該肉盛り材料への添加量を上記の範囲に設定したの
は以下の理由による。即ち、炭素の場合、マルテンサイ
ト変態開始温度Ｍsを低下させるのに最も有効な元素で
あるので、０．５％以下であれば他のＭsを低下させる
元素を多量に添加しなければならず不経済である一方、
１．５％を越えるとＭsが低下し過ぎるため他の元素を
添加できず、そのため靭性等の特性が低下するという弊
害が生じる。また珪素は脱酸効果と溶接中における肉盛
り材料の流動性を向上させる元素であるが、０．２％以
下ではその効果が発揮されず、２．０％を越えると溶接
中における肉盛り材料の流れが良すぎて肉を盛り上げる
ことが困難になる。また、マンガンは脱酸効果や靭性増
加効果に優れ、かつ炭素に次いでＭsを低下させる効果
が大である元素であるが、０．３％以下であればこれら
効果を発揮することができず、また６．０％を越えると
スケールの発生量が増加し作業性が損なわれる。また、
コバルトは炭化物の析出を遅延させ溶接肉盛り後の硬度
を低下させる効果があるが、０．３％以下であればその
効果が得られず、１０．０％を越えるとＭsが上昇しす
ぎると共にコバルトは高価な元素であるためコストが高
くなる。また、クロムは炭素との親和性が強く高硬度の
炭化物となって肉盛り部の耐摩耗性を向上させる元素で
あるが、０．３％以下であればその効果が得られず、１
０．０％を越えると硬度が上がりすぎ耐割れ性や靭性が
損なわれる。Ms = 550−350 × C−40 × Mn−35 × V−20 × Cr−10 × Mo + 15 × Co + 0 × Si (Equation 1) The addition amount to the padding material is the above. The reason for setting the range is as follows. That is, since carbon is the most effective element for lowering the martensitic transformation start temperature Ms, if it is 0.5% or less, another element that lowers Ms must be added in a large amount. While being an economy
If it exceeds 1.5%, Ms is too low to add other elements, which causes a problem that properties such as toughness are deteriorated. Silicon is an element that improves the deoxidizing effect and the fluidity of the cladding material during welding, but if it is less than 0.2%, its effect is not exhibited, and if it exceeds 2.0%, the cladding material during welding. The flow of the meat is so good that it becomes difficult to make the meat heap. Further, manganese is an element that is excellent in the deoxidizing effect and the toughness increasing effect, and has a great effect of lowering Ms next to carbon, but if 0.3% or less, these effects cannot be exhibited, On the other hand, if it exceeds 6.0%, the amount of scale generation increases and the workability is impaired. Also,
Cobalt has the effect of delaying the precipitation of carbides and decreasing the hardness after welding build-up, but if it is less than 0.3%, this effect cannot be obtained, and if it exceeds 10.0%, Ms increases too much. Since cobalt is an expensive element, the cost is high. Further, chromium is an element that has a high affinity for carbon and becomes a high hardness carbide to improve the wear resistance of the built-up portion, but if it is 0.3% or less, the effect cannot be obtained.
If it exceeds 0.0%, the hardness is so high that crack resistance and toughness are impaired.
【０００９】肉盛り材料として組成の異なる種々の試料
を用意し、試験を行った。下記表１に各試料の組成、及
び上記数１により求めた各試料のＭsを示す。 上記各試料を肉盛り溶接した後の硬度と、ドライアイス
（温度−７６℃）によるサブゼロ処理後の硬度と、液体
窒素（温度−１９６℃）によるサブゼロ処理後の硬度と
を測定したところ、結果は図２に示す通りになった。
尚、溶接後の硬度は●、ドライアイスによるサブゼロ処
理後の硬度は△、液体窒素によるサブゼロ処理後の硬度
は×で示されている。この試験結果から、溶接後の硬度
を切削加工可能なＨRC４５以下にするにはＭsを略１５
０℃以下にする必要があることが分る。また、ドライア
イスによるサブゼロ処理によって硬度をＨRC４５以上に
するにはＭsを略０℃以上にする必要があることが判明
したが、液体窒素によるサブゼロ処理を行えばＭsが０
℃を下回っても硬度をＨRC４５以上に増加できることが
判明した。従って、肉盛り部分の機械加工を容易にして
且つサブゼロ処理により所要の硬度を得るには、肉盛り
材料としてＭsが略１５０℃以下になるものを用いれば
良いことが分る。Various samples having different compositions were prepared as padding materials and tested. Table 1 below shows the composition of each sample and the Ms of each sample obtained by the above-mentioned equation 1. The hardness of each of the above samples after overlay welding, the hardness after the subzero treatment with dry ice (temperature -76 ° C), and the hardness after the subzero treatment with liquid nitrogen (temperature -196 ° C) were measured, and the results were obtained. Became as shown in FIG.
The hardness after welding is indicated by ●, the hardness after subzero treatment by dry ice is indicated by Δ, and the hardness after subzero treatment by liquid nitrogen is indicated by ×. From this test result, Ms should be approximately 15 in order to reduce the hardness after welding to HRC45 or less at which cutting can be performed.
It turns out that it is necessary to keep the temperature below 0 ° C. Also, it was found that Ms needs to be approximately 0 ° C. or higher in order to obtain hardness of HRC 45 or higher by the sub-zero treatment with dry ice, but when the sub-zero treatment with liquid nitrogen is performed, Ms becomes 0 or less.
It was found that the hardness can be increased to HRC45 or higher even if the temperature is lower than ℃. Therefore, in order to facilitate the machining of the build-up portion and obtain the required hardness by the sub-zero treatment, it is understood that a build-up material having a Ms of about 150 ° C. or less may be used.
【００１０】ところで、上記実施例ではトリミング金型
においてトリミング刃を形成する場合について説明した
が、ベンド金型におけるパンチのエッジ部を形成する場
合や、ドロー金型におけるダイフェースのビードやパン
チの肩部といったワークを強く加圧する強圧部を形成す
る場合にも本願発明による方法を適用することができ
る。In the above embodiment, the case where the trimming blade is formed in the trimming die has been described. However, the case where the edge portion of the punch in the bend die is formed, the bead of the die face in the draw die and the shoulder of the punch are formed. The method according to the present invention can also be applied to the case where a strong pressure portion that strongly presses a work such as a portion is formed.
【００１１】[0011]
【発明の効果】以上の説明から明らかなように、本発明
は、プレス金型にワーク加工用のエッジ部や強圧部を形
成する際に肉盛り溶接後の機械加工が容易で、かつ修正
加工をせずとも所定硬度以上のエッジ部や強圧部が得ら
れるので、金型製造に要する工数を削減することができ
る。As is apparent from the above description, according to the present invention, it is easy to perform the machining after the build-up welding when forming the edge portion and the strong pressure portion for the work processing in the press die, and the correction processing is performed. Since the edge portion and the high pressure portion having a predetermined hardness or more can be obtained without performing the step, it is possible to reduce the number of steps required for manufacturing the mold.
【図１】 本発明による方法の各工程を示す図FIG. 1 is a diagram showing each step of a method according to the present invention.
【図２】 肉盛り材料の硬度とマルテンサイト変態開始
温度との関係を示す図FIG. 2 is a diagram showing the relationship between the hardness of the cladding material and the martensitic transformation start temperature.
１ トリミング金型 ２ 枠 １１ トリミング刃 １３ 肉盛り部分 1 Trimming die 2 Frame 11 Trimming blade 13 Overlay part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 敬三 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内 (72)発明者 西川 昇 埼玉県狭山市新狭山１丁目10番地１ ホン ダエンジニアリング株式会社内 (72)発明者 河瀬 剛毅 神奈川県横浜市戸塚区東俣野町1186−16 (72)発明者 渡辺 正巳 大阪府高槻市北大樋町36番地 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keizo Tanaka 1-10-1 Shin-Sayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. (72) Noboru Nishikawa 1-10-1 Shin-Sayama City, Sayama City, Saitama Prefecture Da Engineering Co., Ltd. (72) Inventor Takeki Kawase 1186-16 Higashimatano-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture (72) Masami Watanabe 36 In Kita-Ohi-cho, Takatsuki-shi, Osaka
Claims (2)
するプレス金型の製造方法であって、金型素材の該エッ
ジ部又は強圧部を形成する部分に肉盛り材料を肉盛り溶
接し、この肉盛り部分をエッジ部又は強圧部の所要の形
状に機械加工するものにおいて、前記肉盛り材料とし
て、溶接後の硬度がＨRC４５以下となるものを用い、肉
盛り部分の機械加工後にサブゼロ処理を施して肉盛り部
分の硬度を増加させることを特徴とするプレス金型の製
造方法。1. A method of manufacturing a press die having an edge portion or a strong pressure portion for working a workpiece, wherein the build-up material is welded to a portion of the die material forming the edge portion or the strong pressure portion by overlay welding. In machining the padding portion into a desired shape of the edge portion or the high pressure portion, a material having a hardness after welding of HRC45 or less is used as the padding material, and a sub-zero treatment is performed after the machining of the padding portion. A method for manufacturing a press die, characterized by increasing the hardness of a built-up portion.
始温度が略１５０℃以下になる材料であることを特徴と
する請求項１記載のプレス金型の製造方法。2. The method for manufacturing a press die according to claim 1, wherein the build-up material has a martensite transformation start temperature of about 150 ° C. or lower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4214321A JP2582326B2 (en) | 1991-11-27 | 1992-08-11 | Press mold manufacturing method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31276691 | 1991-11-27 | ||
| JP3-312766 | 1991-11-27 | ||
| JP4214321A JP2582326B2 (en) | 1991-11-27 | 1992-08-11 | Press mold manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0623448A true JPH0623448A (en) | 1994-02-01 |
| JP2582326B2 JP2582326B2 (en) | 1997-02-19 |
Family
ID=26520251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4214321A Expired - Fee Related JP2582326B2 (en) | 1991-11-27 | 1992-08-11 | Press mold manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2582326B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4843113A (en) * | 1987-03-24 | 1989-06-27 | Sumitomo Chemical Company, Limited | Aromatic polysulfone resin composition having excellent plating characteristics |
| WO1997029879A1 (en) * | 1996-02-15 | 1997-08-21 | Stevens International | Cutting die and method of forming |
| JP2007098532A (en) * | 2005-10-06 | 2007-04-19 | Konyo:Kk | Hand tool and its manufacturing method |
| DE102006054771A1 (en) * | 2006-11-22 | 2008-05-29 | Bayerische Motoren Werke Ag | Metal part forming die, has form surface with higher surface hardness in areas of increased surface-related friction energy which is determined using coefficient of friction, local normal force between surface and part, and friction path |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430856A (en) * | 2011-10-31 | 2012-05-02 | 重庆长安汽车股份有限公司 | Laser micro-texturing method for mould guide post surface appearance |
-
1992
- 1992-08-11 JP JP4214321A patent/JP2582326B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4843113A (en) * | 1987-03-24 | 1989-06-27 | Sumitomo Chemical Company, Limited | Aromatic polysulfone resin composition having excellent plating characteristics |
| WO1997029879A1 (en) * | 1996-02-15 | 1997-08-21 | Stevens International | Cutting die and method of forming |
| CN1071168C (en) * | 1996-02-15 | 2001-09-19 | 贝尔纳国际公司 | Cutting die and method of forming |
| JP2007098532A (en) * | 2005-10-06 | 2007-04-19 | Konyo:Kk | Hand tool and its manufacturing method |
| DE102006054771A1 (en) * | 2006-11-22 | 2008-05-29 | Bayerische Motoren Werke Ag | Metal part forming die, has form surface with higher surface hardness in areas of increased surface-related friction energy which is determined using coefficient of friction, local normal force between surface and part, and friction path |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2582326B2 (en) | 1997-02-19 |
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