JPS6124331Y2 - - Google Patents
Info
- Publication number
- JPS6124331Y2 JPS6124331Y2 JP9608281U JP9608281U JPS6124331Y2 JP S6124331 Y2 JPS6124331 Y2 JP S6124331Y2 JP 9608281 U JP9608281 U JP 9608281U JP 9608281 U JP9608281 U JP 9608281U JP S6124331 Y2 JPS6124331 Y2 JP S6124331Y2
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- support
- mandrel support
- extrusion
- cover member
- 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
- 239000000463 material Substances 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 description 10
- 229910001315 Tool steel Inorganic materials 0.000 description 7
- 238000003466 welding Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 235000012438 extruded product Nutrition 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Extrusion Of Metal (AREA)
Description
【考案の詳細な説明】
本考案は金属パイプ形材等中空製品を連続押出
し加工するのに好適な中空製品押出し用マンドレ
ルに関する。[Detailed Description of the Invention] The present invention relates to a hollow product extrusion mandrel suitable for continuously extruding hollow products such as metal pipe shapes.
一般に、金属中空製品の連続押出し加工は、外
面形状を規定するダイと、内面形状を規定するマ
ンドレルとからなる押出し工具を第５図に示す回
転ホイール式連続押出機等の連続押出機に装着し
て行なう。ところで金属中空製品を連続押出しす
る場合、押出し工具は高温・高圧の雰囲気下に長
時間さらされるので、通常、熱間強度の秀れた材
料例えばSKD61等の熱間工具鋼で製作される
が、硬度低下が早く、このため、摩耗が比較的短
期間の稼動で進行し、製品寸法公差はずれや製品
の内・外表面あれを生じて使用能となる。すなわ
ち押出し工具の寿命が比較的短かい。 Generally, continuous extrusion processing of hollow metal products is carried out by attaching an extrusion tool consisting of a die that defines the external shape and a mandrel that defines the internal shape to a continuous extruder such as the rotating wheel type continuous extruder shown in Fig. 5. Let's do it. By the way, when continuously extruding hollow metal products, the extrusion tool is exposed to a high temperature and high pressure atmosphere for a long time, so it is usually made of a material with excellent hot strength, such as hot work tool steel such as SKD61. The hardness decreases quickly, and as a result, wear progresses in a relatively short period of operation, causing deviations in product dimensional tolerances and roughness on the inner and outer surfaces of the product, before it becomes unusable. In other words, the life of the extrusion tool is relatively short.
そこで、押出し工具を構成するダイ及びマンド
レルの内、ダイについては熱間工具鋼より更に耐
摩耗性が秀れている超硬合金で製作されたダイを
鋼製ケースに焼ばめし、これを使用する方策がと
られているが、マンドレルについては依然マンド
レルサポートとマンドレル本体とを熱間工具鋼で
１体製作し、これを使用しているのが現状であ
る。 Therefore, among the dies and mandrels that make up the extrusion tool, we used a die made of cemented carbide, which has better wear resistance than hot work tool steel, and was shrink-fitted into a steel case. However, the current state of the art is that the mandrel support and mandrel body are still manufactured as a single unit from hot work tool steel.
近年、マンドレルの熱間耐摩耗性向上対策とし
て、超硬合金で１体製作したマンドレルを使用す
ることが試みられている。ところが、超硬合金製
１体マンドレルの場合、熱間工具鋼製１体マンド
レルと略同一寸法条件では押出しの際の高圧力を
受けてマンドレル本体付根部で破断してしまう欠
点がある。 In recent years, as a measure to improve the hot wear resistance of mandrels, attempts have been made to use mandrels made of cemented carbide. However, in the case of a one-piece mandrel made of cemented carbide, under substantially the same dimensional conditions as a one-piece mandrel made of hot work tool steel, there is a drawback that the mandrel will break at the base of the mandrel body under high pressure during extrusion.
本考案は上記の欠点を解消するためになされた
もので、マンドレル本体とマンドレルサポートと
を別体製作し、両者を組み合わせたマンドレル構
成として、マンドレル本体を超硬合金製とした場
合、超硬合金製ダイとの共用により工具寿命の大
巾改善、高生産性で中空製品が押出し加工できる
中空製品押出し用マンドレルを提供しようとする
ものである。 This invention was made to eliminate the above-mentioned drawbacks.The mandrel body and the mandrel support are manufactured separately, and the mandrel structure is a combination of the two.If the mandrel body is made of cemented carbide, The present invention aims to provide a mandrel for extruding hollow products that can greatly improve tool life and extrude hollow products with high productivity by being used in common with manufacturing dies.
以下、その実施例を図面について説明すると、
図中１はマンドレル本体でその頭部２がテーパ面
に形成されている。３は熱間工具鋼製のマンドレ
ルサポートで、テーパ穴４を有しており、このテ
ーパ穴４にマンドレル本体１の頭部２を嵌着する
構造としている。５はマンドレルサポート３の素
材流動方向上流側に位置しマンドレルサポートの
周壁上から架設された蓋被部材で、熱間工具鋼で
製作されており、マンドレルサポート３との接当
面に介装したノツクピン６で分流穴７，８の位置
ずれを防止している。９は鋼製ケース１０に焼ば
めされた超硬合金製のダイ、１１はウエルデイン
グチヤンバでマンドレル本体１及びマンドレルサ
ポート３とダイ９とで構成されている。１２は工
具ホルダを示す。 Below, the example will be explained with reference to the drawings.
In the figure, 1 is a mandrel body whose head 2 is formed into a tapered surface. Reference numeral 3 designates a mandrel support made of hot work tool steel, which has a tapered hole 4 into which the head 2 of the mandrel body 1 is fitted. Reference numeral 5 denotes a cover member located on the upstream side of the mandrel support 3 in the material flow direction and installed from above the peripheral wall of the mandrel support.It is made of hot work tool steel and has a knock pin interposed in the contact surface with the mandrel support 3. 6 prevents displacement of the flow dividing holes 7 and 8. 9 is a die made of cemented carbide which is shrink-fitted to a steel case 10, and 11 is a welding chamber which is composed of a mandrel body 1, a mandrel support 3, and a die 9. 12 indicates a tool holder.
本考案はこのように構成されているので、図外
連続押出機の押出室から導出された可塑的状態の
金属素材は通路１３を通つて蓋被部材５に到達
し、蓋被部材５及びマンドレルサポート３に一連
に形成されている分流穴７，８を分流し、ウエル
デイングチヤンバ１１内で合流し溶着された後、
マンドレル本体１とダイ９との間の環状間隙より
中空製品として押出される。この押出しの際、蓋
被部材５で受けた素材圧力の内の大部分はマンド
レルサポート３の周壁→ダイ９→工具ホルダ１２
に伝えられ、マンドレルサポート３の中央部には
蓋被部材５の変位による作用力と、素材がウエル
デイングチヤンバ１１よりダイベアリングに向つ
て流動する時マンドレル本体１に受ける引張力が
わずかに作用するだけになる。従つて、マンドレ
ルサポート３の中央部における変形を生ぜず偏肉
のない良好な押出製品が得られる。マンドレルサ
ポート３及び蓋被部材５を共に熱間工具鋼製とし
ておくと、高温・高圧の雰囲気に長時間さらされ
ても強度は十分に維持される。又、マンドレル本
体１はこれを超硬合金で製作しておくと、高温・
高圧の雰囲気に長時間さらされても硬度低下は小
さい。工具寿命が大巾に向上できる。 Since the present invention is configured in this way, the metal material in a plastic state led out from the extrusion chamber of the continuous extruder (not shown) passes through the passage 13 and reaches the cover member 5, and the metal material is transferred to the cover member 5 and the mandrel. After dividing the flow through the flow dividing holes 7 and 8 formed in a series in the support 3, and joining and welding in the welding chamber 11,
A hollow product is extruded from the annular gap between the mandrel body 1 and the die 9. During this extrusion, most of the material pressure received by the cover member 5 is transferred from the peripheral wall of the mandrel support 3 to the die 9 to the tool holder 12.
The force exerted by the displacement of the cover member 5 and the tensile force exerted on the mandrel body 1 when the material flows from the welding chamber 11 toward the die bearing slightly act on the central part of the mandrel support 3. Just do it. Therefore, a good extruded product without deformation in the central part of the mandrel support 3 and without uneven thickness can be obtained. If both the mandrel support 3 and the cover member 5 are made of hot work tool steel, their strength will be maintained sufficiently even if they are exposed to a high temperature and high pressure atmosphere for a long time. Also, if the mandrel body 1 is made of cemented carbide, it can withstand high temperatures and
Hardness decreases little even if exposed to high pressure atmosphere for a long time. Tool life can be greatly improved.
以上のように、本考案によるとマンドレルサポ
ート３の中央部における変形を生ぜず、マンドレ
ルが傾斜したり芯ズレすることのない状態で偏肉
のない良好な押出製品が得られる大なる効果があ
る。又、マンドレルサポートとマンドレル本体と
は異つた材料で製作することが可能となり、マン
ドレル本体１を超硬合金製とする場合には、超硬
合金製ダイと共用することにより、中空製品押出
し工具の寿命が大巾に改善されランニングコスト
の低減と、熱間押出しによる生産性向上とが達成
できる。 As described above, the present invention has the great effect of not causing deformation in the central part of the mandrel support 3, and of obtaining a good extruded product without uneven thickness without causing the mandrel to be tilted or misaligned. . In addition, the mandrel support and the mandrel body can be made of different materials, and if the mandrel body 1 is made of cemented carbide, the hollow product extrusion tool can be It is possible to significantly improve the lifespan, reduce running costs, and improve productivity through hot extrusion.
尚、上記実施例では、マンドレル本体１をマン
ドレルサポート３にテーパ嵌合させるようにして
いるが、第３図に示す如く、すきまばめするもの
でもよい。又、蓋被部材５はその平面形状が分流
穴を除いてマンドレルサポート３の全面を覆うこ
とができる円形に限らず第４図に示すように、主
とそしてマンドレルサポートの中央部のみを覆う
４脚形のものでもよい。 In the above embodiment, the mandrel main body 1 is tapered fitted to the mandrel support 3, but it may be fitted with a clearance as shown in FIG. In addition, the planar shape of the cover member 5 is not limited to a circular shape that can cover the entire surface of the mandrel support 3 except for the flow dividing hole, but can also be a shape that covers only the main and central part of the mandrel support 3, as shown in FIG. It may also be leg-shaped.
第１図は本考案に係る中空製品押出し用マンド
レルの断面図、第２図は第１図線に沿う平面
図、第３図は本考案マンドレルの変形例を示す
図、第４図は蓋被部材の変形例を示す図、第５図
は従来のマンドレルとその使用状態とを示す図で
ある。
１……マンドレル本体、３……マンドレルサポ
ート、５……蓋被部材。
Fig. 1 is a sectional view of the mandrel for extruding hollow products according to the present invention, Fig. 2 is a plan view taken along the line of Fig. 1, Fig. 3 is a view showing a modification of the mandrel of the present invention, and Fig. 4 is a lid cover. FIG. 5 is a diagram showing a modification of the member, and is a diagram showing a conventional mandrel and its usage state. 1... Mandrel main body, 3... Mandrel support, 5... Lid covering member.
Claims (1)
支持するマンドレルサポートと、マンドレルサポ
ートの素材流動方向上流側に位置しマンドレルサ
ポートの周壁上から架設された分流通路付蓋被部
材とからなる中空製品押出し用マンドレル。 For extruding hollow products, consisting of a mandrel body, a mandrel support that engages and supports the mandrel body, and a cover member with a diversion passage located on the upstream side of the mandrel support in the direction of material flow and installed from above the peripheral wall of the mandrel support. mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9608281U JPS584213U (en) | 1981-06-30 | 1981-06-30 | Mandrel for extruding hollow products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9608281U JPS584213U (en) | 1981-06-30 | 1981-06-30 | Mandrel for extruding hollow products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS584213U JPS584213U (en) | 1983-01-12 |
| JPS6124331Y2 true JPS6124331Y2 (en) | 1986-07-22 |
Family
ID=29890963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9608281U Granted JPS584213U (en) | 1981-06-30 | 1981-06-30 | Mandrel for extruding hollow products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS584213U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59162112U (en) * | 1983-04-14 | 1984-10-30 | 住友重機械工業株式会社 | Mandrel for extruding hollow products |
-
1981
- 1981-06-30 JP JP9608281U patent/JPS584213U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS584213U (en) | 1983-01-12 |
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