JPH0619533Y2 - Sinter forging die - Google Patents
Sinter forging dieInfo
- Publication number
- JPH0619533Y2 JPH0619533Y2 JP12993787U JP12993787U JPH0619533Y2 JP H0619533 Y2 JPH0619533 Y2 JP H0619533Y2 JP 12993787 U JP12993787 U JP 12993787U JP 12993787 U JP12993787 U JP 12993787U JP H0619533 Y2 JPH0619533 Y2 JP H0619533Y2
- Authority
- JP
- Japan
- Prior art keywords
- work
- mold
- die
- upper mold
- water droplets
- 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
Landscapes
- Powder Metallurgy (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Forging (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、水分をきらうワークを鍜造するための焼結鍜
造用金型に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a sintering die for making a work that is water resistant.
（従来の技術） 焼結鍜造工程においては、鍜造機の金型に通常水とグラ
ファイトの混合物（以下潤滑剤という）を冷却と潤滑の
ため１サイクルごとに吹き付けている。この方法は、上
部金型の下方から複数のノズルを使用して、潤滑剤を上
部金型の全面に吹きつけ、その後エアブローする。この
ように金型の加熱を抑え、金型温度を150℃〜250℃に保
つように冷却する。(Prior Art) In a sintering process, a mixture of water and graphite (hereinafter referred to as a lubricant) is generally sprayed on a die of a forging machine for each cycle for cooling and lubrication. In this method, a plurality of nozzles are used from below the upper mold, and a lubricant is sprayed on the entire surface of the upper mold, followed by air blowing. In this way, the heating of the mold is suppressed, and the mold is cooled so that the mold temperature is maintained at 150 ° C to 250 ° C.
（考案が解決しようとする問題点） しかしながら、上部金型の冷却サイクルでは、上部金型
に潤滑剤を吹き付けると、水滴となつて金型に附着し、
次のサイクルに移るときには水滴は熱のため蒸発するが
一部は金型側面に残り、下方のワークに流下する。第５
図によつてこの状態を説明すると、上部金型11は、上ラ
ム12に支持され、下方に位置するダイ13および下部金型
14に乗せられているワーク15を鍜造するが、冷却時の水
滴16が金型11の側面から、焼結加熱されたワーク15の上
に落下する。そしてワーク15がポーラスであるために水
滴がワーク15の中に侵入するかまたは、上部金型で鍜造
したときにワーク上面に附着している水滴を打ち込むか
してワークに水分が含まれると、その部分から酸化が起
り、ネツトワーク状の酸化物（第６図）が形成され、材
質、強度の低下が起こる。(Problems to be solved by the invention) However, in the cooling cycle of the upper mold, when a lubricant is sprayed on the upper mold, it becomes water drops and adheres to the mold.
When moving to the next cycle, the water droplets evaporate due to heat, but part of them remains on the side surface of the mold and flows down to the work below. Fifth
This state will be described with reference to the drawing. The upper die 11 is supported by the upper ram 12, and the die 13 and the lower die 12 located below are supported.
The work 15 placed on 14 is manufactured, but water droplets 16 at the time of cooling fall from the side surface of the mold 11 onto the work 15 sintered and heated. Then, since the work 15 is porous, water drops will enter the work 15, or if the water drops attached to the top surface of the work when the work is made by the upper die are included in the work. Oxidation occurs from that portion, and a network-like oxide (Fig. 6) is formed, resulting in deterioration of material and strength.
ワーク15に水滴が附着しないためには、水滴の発生を抑
えるため、金型温度を高くするかエアブローの時間を長
くする、あるいは吹き付ける潤滑材の量を少なくするな
どが考えられるが、金型温度を上げると型寿命が低下
し、エアブローの時間が長いとサイクルタイムが延長し
生産性が低下する。また、潤滑材が充分に吹きつけられ
ないと、金型の冷却効果および潤滑効果が低下する。In order to prevent water droplets from adhering to the work 15, it is conceivable to raise the mold temperature, lengthen the air blow time, or reduce the amount of lubricant to be sprayed in order to suppress the generation of water droplets. If it is raised, the mold life will be shortened, and if the air blow time is long, the cycle time will be extended and the productivity will be lowered. Further, if the lubricant is not sufficiently sprayed, the cooling effect and the lubrication effect of the mold are deteriorated.
本考案は、上記問題点を鑑みて冷却時の水滴がワークに
附着しないため焼結鍜造用金型を提供する。In view of the above problems, the present invention provides a mold for sintering forging since water droplets do not adhere to the work during cooling.
（問題点を解決するための手段） 本考案は、上記目的を達成するために、冷却機構を有す
る型締機において、ワークを上方より鍜造する上部金型
の先端外周面に、冷却等に要した水滴の流下を防止する
ための水平方向に延びる環状の溝を形成したことを特徴
とする。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a mold clamping machine having a cooling mechanism, for example, for cooling the outer peripheral surface of the upper die for making a work from above. It is characterized in that an annular groove extending in the horizontal direction is formed to prevent the required water drop from flowing down.
（作用） 本考案は、上記のように構成するものであるから、上部
金型に吹きつけた水滴は、金型の温度で大部分が蒸発
し、一部金型外周面に付着している水滴はエアブローで
排除され、さらに上部金型に設けられた溝に流入し、金
型の熱で蒸発されてワーク上に流下する水滴は激減す
る。(Operation) Since the present invention is configured as described above, most of the water droplets sprayed on the upper die are evaporated at the temperature of the die and partially adhered to the outer peripheral surface of the die. The water droplets are removed by air blow, further flow into the groove provided in the upper mold, and the water drops that are evaporated by the heat of the mold and flow down onto the work are drastically reduced.
（実施例） 本考案の実施例を第１図ないし第４図に基づいて説明す
る。(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 4.
図において１は鍜造機であり、上部金型２を固定した上
ラム３と下部金型４とダイ５からなつており、上ラム３
がダイ５に向つて近接、遠退可能に設けられている。上
部金型２は、ワーク６と当接する意匠面2aを下面に形成
し、断面略半円状の溝2b（巾４mm、深さ２mm）を側面に
環状に形成している。ワーク６はダイ５と下部金型４で
囲まれた凹部に置かれる。In the figure, 1 is a manufacturing machine, which is composed of an upper ram 3 to which an upper die 2 is fixed, a lower die 4 and a die 5.
Are provided so as to approach and leave the die 5. The upper mold 2 has a design surface 2a that contacts the work 6 on the lower surface, and a groove 2b (width 4 mm, depth 2 mm) having a substantially semicircular cross section, which is annular on the side surface. The work 6 is placed in a recess surrounded by the die 5 and the lower die 4.
また、図示はしないが上部金型の下方に、複数個のノズ
ル（たとえば４箇）を、ノズル先端を金型に向けて配設
し、潤滑剤をこのノズルから吹きだすようにした。エア
ブロー用ノズルも同様に配設する。Although not shown, a plurality of nozzles (for example, four nozzles) were arranged below the upper mold with the nozzle tips facing the mold, and the lubricant was blown out from the nozzles. The air blow nozzle is also arranged in the same manner.
上記金型２がワーク６の上方にあるとき、冷却後の余分
な水滴７は溝2bに流入し、そして、漸次蒸発し、ワーク
６は乾燥状態を維持するので水分の影響をうけないで仕
上げられる。When the mold 2 is above the work 6, excess water droplets 7 after cooling flow into the groove 2b and gradually evaporate, and the work 6 is maintained in a dry state so that it is finished without being affected by moisture. To be
第３図に示す断面Ｈ形状のテストピース８を作製し、経
過を追跡した。テストピースは純鉄粉に銅粉２％、黒鉛
0.6％、ステアリン酸亜鉛0.6％を添加し、Ｖ型混粉機に
て20分間混粉し、密度6.5ｇ／cm3に圧粉成形した後にRX
ガス雰囲気（カーボンポテンシヤル0.4〜0.5）中で1120
℃30分間加熱したものを面圧10t/cm2で鍜造した。テス
トピース８の寸法はW1＝20mm、W2＝10mm、H1＝15mm、H2
＝5mm、Ｄ＝100mmであつた。A test piece 8 having an H-shaped cross section shown in FIG. 3 was produced and its progress was traced. The test piece is pure iron powder, copper powder 2%, graphite
Add 0.6% and zinc stearate 0.6%, mix with a V-type mixer for 20 minutes, and compact into a density of 6.5 g / cm 3 and then RX
1120 in a gas atmosphere (carbon potentiometer 0.4 to 0.5)
What was heated at 30 ° C for 30 minutes was manufactured at a surface pressure of 10 t / cm 2 . The dimensions of the test piece 8 are W1 = 20mm, W2 = 10mm, H1 = 15mm, H2
= 5 mm, D = 100 mm.
上部金型２に潤滑剤を吹きつける工程は、潤滑剤100CC
を１秒間、エアブローを圧力4kg/cm2で２秒間吹きつ
け、冷却、乾燥を行ない、鍜造工程は６秒間１サイクル
で稼動した。The process of spraying the lubricant to the upper mold 2 is 100CC of lubricant.
Was blown for 1 second with an air blow at a pressure of 4 kg / cm 2 for 2 seconds, cooled and dried, and the milling process was operated for one cycle for 6 seconds.
上部金型２がダイ５の上方に位置したとき、下方に配置
したノズルから潤滑剤を１秒間、上部金型２全体に吹き
つけ、ひきつづき２秒間エアブローが働き、ただちに熱
いワークをダイ５と下部金型で形成された凹部へ設置
し、上部金型２で鍜造した。この間、エアブローで排除
されなかつた水滴７は上部金型２の側面を伝わつて溝2b
に捕捉され、上部金型２の熱で蒸発した。第７図はこの
実験で製造したワークの断面を移したもので、水滴の落
下によつて形成される酸化物は見られない。When the upper mold 2 is located above the die 5, the nozzle is arranged below to spray the lubricant on the entire upper mold 2 for 1 second, and then the air blow works continuously for 2 seconds to immediately apply the hot work to the die 5 and the lower part. It was installed in the concave portion formed by the mold and manufactured by the upper mold 2. During this time, the water droplets 7 that have not been removed by the air blow are transmitted along the side surface of the upper mold 2 to the groove 2b.
Was captured by the above and evaporated by the heat of the upper mold 2. FIG. 7 is a transfer of the cross section of the work produced in this experiment, and no oxide is formed by the drop of water droplets.
以上、本実施例により鍜造したテストピースは、水滴の
影響が激減し、酸化の発生率が従来の技術においては15
0本中16本であるのに比べて、200本中では発生なしであ
つた。また、従来技術においては、10秒以上のサイクル
タイムをとつて酸化の発生率を抑えていたものを、溝2b
を設けることにより、サイクルタイムを縮めることがで
き、生産性向上をもたらした。なお、酸化したテストピ
ースと良質のテストピースとの強度を３点曲げ試験で計
測すると、第４図に示すようにその強度は大きな差異が
あり、本実施例ではこの酸化による品質ばらつきがなく
なり、ワークの信頼性が得られる。As described above, the test piece manufactured according to this example has a significantly reduced influence of water droplets, and the rate of oxidation is 15% in the conventional technique.
There was no occurrence in 200 compared to 16 in 0. In addition, in the prior art, the one in which the generation rate of oxidation was suppressed by taking a cycle time of 10 seconds or more
By providing the, the cycle time can be shortened and the productivity is improved. When the strengths of the oxidized test piece and the good quality test piece were measured by the three-point bending test, there was a large difference in the strengths as shown in FIG. 4, and in this example, there was no variation in quality due to the oxidation. Work reliability can be obtained.
なお、本実施例における上部金型の溝2bの寸法形状は状
況により適宜変更してもよい。The size and shape of the groove 2b of the upper mold in this embodiment may be changed appropriately depending on the situation.
（考案の効果） 本考案は、以上のように構成するものであるから、冷却
用潤滑剤が上部金型に水滴となつて残つても上部金型に
形成した溝によつて水滴が早く蒸発するために、ワーク
の鍜造工程で水分による不良発生が激減する効果があ
る。したがつて強度に対する品質のばらつきがなくな
り、ワークの信頼性が高くなる。また、水滴がワークに
流下する心配がなくなつたので鍜造サイクルを従来より
も短縮することが可能となり、生産性向上が得られる。(Effect of the Invention) Since the present invention is configured as described above, even if the cooling lubricant remains as a water drop in the upper mold, the water drop quickly evaporates due to the groove formed in the upper mold. Therefore, there is an effect that the occurrence of defects due to moisture is drastically reduced in the work making process. Therefore, there is no variation in quality with respect to strength, and the reliability of the work is improved. Further, since there is no concern that water droplets will flow down to the work, the manufacturing cycle can be shortened as compared with the conventional method, and the productivity can be improved.
第１図は本考案の実施例の断面図、 第２図は実施例中、上部金型の側面図、 第３図は実施例で使用したワークの斜視図、 第４図はワークの強度比較図、 第５図は従来の型締機の断面図、 第６図は従来装置により製造されたワーク断面の金属組
織を示す顕微鏡写真、 第７図は本考案により製造されたワーク断面の金属組織
を示す顕微鏡写真である。 １……鍜造機 ２……上部金型 2b……溝 ６……ワークFIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a side view of an upper mold in the embodiment, FIG. 3 is a perspective view of a work used in the embodiment, and FIG. 4 is a strength comparison of the work. Fig. 5 is a cross-sectional view of a conventional mold clamping machine, Fig. 6 is a micrograph showing a metallographic structure of a cross-section of a workpiece manufactured by a conventional apparatus, and Fig. 7 is a metallographic structure of a cross-section of a workpiece manufactured by the present invention. FIG. 1 ... Making machine 2 ... Upper mold 2b ... Groove 6 ... Work
Claims (1)
を上方より鍜造する上部金型の先端外周面に、水平方向
に延びる環状の溝を形成したことを特徴とする焼結鍜造
用金型。1. A mold clamping machine having a cooling mechanism, wherein an annular groove extending in the horizontal direction is formed on the outer peripheral surface of the tip of an upper mold for forging a work from above. Mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12993787U JPH0619533Y2 (en) | 1987-08-26 | 1987-08-26 | Sinter forging die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12993787U JPH0619533Y2 (en) | 1987-08-26 | 1987-08-26 | Sinter forging die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6437440U JPS6437440U (en) | 1989-03-07 |
| JPH0619533Y2 true JPH0619533Y2 (en) | 1994-05-25 |
Family
ID=31384663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12993787U Expired - Lifetime JPH0619533Y2 (en) | 1987-08-26 | 1987-08-26 | Sinter forging die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619533Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5656232B2 (en) * | 2012-11-27 | 2015-01-21 | 鹿児島県 | Design method for forging die for drilling and forging die for drilling |
-
1987
- 1987-08-26 JP JP12993787U patent/JPH0619533Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6437440U (en) | 1989-03-07 |
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