JP4365181B2 - Casting trimming equipment - Google Patents

Casting trimming equipment Download PDF

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JP4365181B2
JP4365181B2 JP2003345758A JP2003345758A JP4365181B2 JP 4365181 B2 JP4365181 B2 JP 4365181B2 JP 2003345758 A JP2003345758 A JP 2003345758A JP 2003345758 A JP2003345758 A JP 2003345758A JP 4365181 B2 JP4365181 B2 JP 4365181B2
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workpiece
insert
product
lower mold
line contact
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JP2005111488A (en
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隆 中道
誠章 安藤
和孝 森本
伸昭 長谷川
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Toyota Motor Corp
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Description

本発明は、トリミング型によって鋳造品の方案部を切断するための技術に関するものである。   The present invention relates to a technique for cutting a plan part of a cast product with a trimming die.

鋳造品の周囲には、せきや湯道等の方案部が製品部と一緒に鋳造されることから、最終的な製品形状を得るためには、方案部を除去する必要がある。そこで、従来から、鋳造品の方案部を除去するトリミング装置の発明がなされている(例えば、特許文献1参照。)。   Around the cast product, a design part such as a cough and a runway is cast together with the product part. Therefore, in order to obtain a final product shape, it is necessary to remove the design part. Therefore, conventionally, an invention of a trimming apparatus for removing a design part of a cast product has been made (for example, see Patent Document 1).

特開昭56−99071号公報(第2頁、図1〜図3)JP-A-56-99071 (second page, FIGS. 1 to 3)

ところで、鋳造部品の外径寸法精度が要求される箇所では、切断面が平滑であることが必要不可欠となるが、切断面を整えるためには、製品に対する切刃の投入角を小さくする(15°以内)ことが望ましい。しかしながら、製品形状によっては、適切な範囲の切刃の投入角度を採ることができず、投入角度が大きくなってしまうことがある。すると、図4に示すように、製品1と、製品1をせん断するための切刃2(上型)とが、矢印A、Bで示すように互いに逃げるように変位して、せん断面3が下型4の端部4aから遠ざかるように形成される。そして、最終的には、せん断面3の先端部から下型4の端部4aに向けて、破断面5が鋭角に折れ曲がるように伸び、図5に示すように、切断面に鋭角エッジEを形成することとなる。したがって、この鋭角エッジEを除去するための後仕上工程が必要不可欠となり、鍛造部品の製造コストを増大させる一因となっていた。   By the way, it is indispensable that the cut surface is smooth at a location where the outer diameter dimensional accuracy of the cast part is required. However, in order to prepare the cut surface, the angle of insertion of the cutting blade with respect to the product is reduced (15 (Within °) is desirable. However, depending on the product shape, the insertion angle of the cutting blade in an appropriate range cannot be taken, and the insertion angle may increase. Then, as shown in FIG. 4, the product 1 and the cutting blade 2 (upper die) for shearing the product 1 are displaced so as to escape from each other as indicated by arrows A and B, so that the shear surface 3 is formed. It is formed so as to move away from the end 4 a of the lower mold 4. Finally, the fracture surface 5 extends so as to be bent at an acute angle from the tip of the shear surface 3 toward the end 4a of the lower mold 4, and an acute edge E is formed on the cut surface as shown in FIG. Will be formed. Therefore, a post-finishing process for removing the sharp edge E is indispensable, which increases the manufacturing cost of forged parts.

本発明は上記課題に鑑みてなされたものであり、その目的とするところは、トリミング型によって鋳造品の方案部を切断する際に、製品に対する切刃の投入角の如何にかかわらず、切断面に鋭角エッジを形成することを防ぎ、後仕上加工をすることなく、寸法精度の高い製品を得ることにある。また、トリミング作業によって消耗する金型の保全性を高めることにある。   The present invention has been made in view of the above problems, and the object of the present invention is to cut the cut surface of the cast product with the trimming die regardless of the insertion angle of the cutting edge with respect to the product. It is intended to obtain a product with high dimensional accuracy without preventing the formation of acute-angled edges and without post finishing. Another object of the present invention is to improve the maintainability of the mold that is consumed by the trimming operation.

上記課題を解決するための、本発明の請求項1に係る鋳造品のトリミング装置は、上下型により鋳造品の方案部を切断・除去するトリミング装置であって、下型の、端部へ向かって下がる傾斜面であるワーク受面の端部を切欠き、それによって形成された段部に入子を設け、該入子と、下型のワーク受面とが連続面を形成することなく、前記下型のワーク受面の端部ではワークに対し前記入子の端部のみが線接触することで、鋳造品の逃げが生じないようにした状態で、上型の切刃によりワーク上面からせん断を起こさせることで、鋳造品と上型の切刃とが、互いに逃げるように変位して、せん断面が下型のワーク受け面の端部から遠ざかるように形成されることなく、前記入子の端部と前記ワークとの線接触部を支点としてワークに破断を誘発させて、前記線接触部へと破断面を誘導するように構成したことを特徴とするものである。
本発明によれば、下型の、端部へ向かって下がる傾斜面であるワーク受面の端部を、ワークを線で受ける入子により構成したことにより、トリミング工程中において、前記下型の入子の端部をワークに対し線接触させることとなる。また、前記下型のワーク受面の端部を切欠き、段部を形成することで、前記入子の設置場所を下型に確保することができる。又、当該段部に設けられる前記入子と、前記ワーク受面とが連続面を形成することなく、ワークに対し当該入子の端部が線接触することとなる。したがって、トリミング工程中において、前記ワークと、下型の切刃として機能する前記入子との位置を固定し、ワークの逃げが生じないようにすることができる。そして、ワークと、下型の切刃として機能するワーク受面の端部の入子との位置を固定し、ワークの逃げが生じないようにした状態で、前記上型の切刃によりワーク上面からせん断を起こさせる。すると、前記上型の切刃によってワークに形成されるせん断面がワークの深部に到達することなく、前記入子のワークとの線接触部を支点としてワークに破断を誘発させて、前記線接触部へと破断面を誘導することが可能となる。このときのせん断面と破断面とのなす角度は平行に近いものとなり、切断面に鋭角エッジを形成することを回避することが可能となる。
In order to solve the above-mentioned problems, a trimming apparatus for a cast product according to claim 1 of the present invention is a trimming apparatus for cutting and removing a plan part of a cast product by an upper and lower mold, and is directed toward the end of the lower mold. is an inclined surface descending Te-out the end of the work receiving surface notch, it is provided a nest on a stepped portion formed by, without the該入Ko, and a lower die workpiece-receiving surface to form a continuous surface , said at the end of the lower mold of the workpiece-receiving surface that only the ends of the entering element the workpiece is in line contact, with the relief of the casting was not allowed to occur, the work top by cutting the upper die By causing shearing, the casting and the upper die cutting edge are displaced so as to escape from each other, and the shearing surface is not formed so as to be away from the end of the lower die workpiece receiving surface. breaking the work line contact portion between the end portion of the insert and the workpiece as the fulcrum Induced not by and is characterized by being configured to induce fracture surfaces to the line contact portion.
According to the present invention , the end portion of the workpiece receiving surface, which is an inclined surface that descends toward the end portion of the lower die , is configured by the insert that receives the workpiece with a line, so that during the trimming process, The end of the insert will be in line contact with the workpiece. Moreover, the installation location of the said nest | insert can be ensured in a lower mold | type by notching the edge part of the said workpiece receiving surface of a lower mold | type, and forming a step part. In addition, the end of the insert comes into line contact with the workpiece without forming a continuous surface between the insert and the workpiece receiving surface provided in the stepped portion. Therefore, during the trimming process, the position of the workpiece and the insert that functions as the lower die cutting edge can be fixed so that the workpiece does not escape. The fixed and the workpiece, the positions of the insert of the end portion of the work receiving surface that serves as a cutting edge of the lower die, while as relief of the workpiece does not occur, the work top by cutting of the upper die Cause shearing. Then, the without shearing surface formed on the workpiece by the upper die of the cutting edge reaches the deep part of the workpiece, and a fracture in the work to induce as a fulcrum line contact portion between the work of the insert, the line contact It is possible to guide the fracture surface to the part. At this time, the angle formed by the shear surface and the fracture surface is nearly parallel, and it is possible to avoid the formation of an acute edge on the cut surface.

また、本発明の請求項2に係る鋳造品のトリミング装置は、請求項1記載の鋳造品のトリミング装置において、前記段部に、ワークを線で受ける入子を、段部からの突出量を調整可能に設けたことを特徴とするものである。
本発明によれば、また、前記入子のワークとの線接触部が摩耗により劣化した場合には、前記入子の突出量を増大させ、かつ、増大した突出部分を削り出すことにより、再び前記入子とワークとの接触部を線接触させることが可能となる。さらに、前記入子の突出部分の削り出し作業を複数回行った後は、前記入子を新しい入子と交換することで、入子の切刃としての機能を常に維持することが可能となっている。
A cast product trimming device according to claim 2 of the present invention is the cast product trimming device according to claim 1, wherein the step receiving portion has a nest for receiving a workpiece by a line, and a protruding amount from the step portion. It is provided so as to be adjustable.
According to the present invention, when the line contact portion with the work of the insert is deteriorated due to wear, the protrusion amount of the insert is increased, and the increased protrusion is cut out again. It is possible to make a line contact at the contact portion between the insert and the workpiece. Furthermore, after performing the cutting operation of the protruding portion of the insert a plurality of times, it becomes possible to always maintain the function as the insert cutting blade by replacing the insert with a new insert. ing.

本発明はこのように構成したので、トリミング型によって鋳造品の方案部を切断する際に、製品に対する切刃の投入角の如何にかかわらず、切断面に鋭角エッジを形成することを防ぎ、後仕上加工をすることなく、寸法精度の高い製品を得ることが可能となる。また、トリミング作業によって消耗する金型の保全性を高めることが可能となる。   Since the present invention is configured in this way, when cutting the design part of the cast product with the trimming die, it is possible to prevent the formation of an acute edge on the cut surface regardless of the insertion angle of the cutting blade with respect to the product. A product with high dimensional accuracy can be obtained without finishing. In addition, it is possible to improve the maintainability of the mold that is consumed by the trimming operation.

以下、本発明を実施するための最良の形態を添付図面に基づいて説明する。なお、従来技術と同一部分若しくは相当する部分については同一符号で示し、詳しい説明を省略する。   The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that the same or corresponding parts as those of the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.

図1には、本発明の実施の形態に係るトリミング装置によって、製品1の方案部1a(図2参照)を切断・除去する様子を模式的に示している。本発明の実施の形態では、下型4の、端部へ向かって下がる傾斜面であるワーク受面4bの端部を切欠き、それによって形成された段部6に、入子7を設けている。また、図2には、製品1の方案部1aと下型4との位置関係を平面図で示しているが、図示のごとく入子7は、製品1の方案部に面する位置に配置されている。そして、図1に示すように、段部6に設けられた入子7と、ワーク受面4bとが連続面を形成することなく、下型4の端部では、製品1に対し入子7の端部7aのみが線接触することとなる。したがって、入子7の端部7aが、下型4の切刃として機能することとなる。
しかも、入子7は、段部6に対しその突出量が調整可能となるように固定されており、図3(a)に示すように、入子7のワークとの線接触部である端部7aが摩耗により劣化した場合には、図3(b)に示すように、入子7と段部壁面との間にシム8を噛ませることで、入子7の突出量を増大させ、かつ、増大した突出部分を削り出すことにより、再び良好な端部7a’を得ることが可能となる。なお、この端部7a、7a’の改修作業を複数回行った後に、入子7を新しい入子と交換することで、入子7の切刃としての機能を常に維持することが可能となっている。
FIG. 1 schematically shows how the design unit 1a (see FIG. 2) of the product 1 is cut and removed by the trimming apparatus according to the embodiment of the present invention. In the embodiment of the present invention , the end portion of the workpiece receiving surface 4b, which is an inclined surface that descends toward the end portion of the lower mold 4 , is cut out, and a nest 7 is provided in the step portion 6 formed thereby. Yes. FIG. 2 is a plan view showing the positional relationship between the design part 1 a of the product 1 and the lower mold 4. As shown in the drawing, the insert 7 is arranged at a position facing the design part of the product 1. ing. As shown in FIG. 1, the insert 7 provided in the step portion 6 and the workpiece receiving surface 4 b do not form a continuous surface, and the insert 7 is inserted into the product 1 at the end of the lower mold 4. Only the end portion 7a of the wire is in line contact. Therefore, the end 7 a of the insert 7 functions as a cutting blade of the lower mold 4.
In addition, the insert 7 is fixed to the step portion 6 so that the protrusion amount thereof can be adjusted, and as shown in FIG. 3A, the end 7 is a line contact portion with the workpiece. When the portion 7a is deteriorated due to wear, as shown in FIG. 3B, the protruding amount of the nest 7 is increased by biting a shim 8 between the nest 7 and the step wall surface, In addition, by cutting out the increased protruding portion, it is possible to obtain a good end 7a ′ again. In addition, after performing the repair work of this edge part 7a, 7a 'several times, it becomes possible to always maintain the function as a cutting blade of the insert 7 by replacing the insert 7 with a new insert. ing.

上記構成をなす本発明の実施の形態により得られる作用効果は、以下の通りである。まず、下型4の、端部へ向かって下がる傾斜面であるワーク受面4bの端部を、製品1(ワーク)を線で受ける入子7により構成したことにより、方案部1aの切断時に、製品1と、下型4の切刃として機能するワーク受面の端部である入子7の端部7aとの位置を固定することができる。そして、製品1の逃げが生じないようにした状態で、上型の切刃2により製品上面からせん断を起こさせる。すると、図1に示すように、上型の切刃2によって製品に形成されるせん断面3が製品1の深部に到達することなく、下型4の入子7の製品1との線接触部(7a)を支点として製品1に破断を誘発させることが可能となる。そして、せん断面3の先端部から、下型4の入子7の、製品1との線接触部(7a)へと破断面5を誘導することが可能となる。このときのせん断面3と破断面5とのなす角度は平行に近いものとなり、切断面に鋭角エッジE(図5)の形成を回避することが可能となる。 The effects obtained by the embodiment of the present invention having the above-described configuration are as follows. First, the end portion of the workpiece receiving surface 4b, which is an inclined surface that descends toward the end portion of the lower mold 4 , is constituted by the insert 7 that receives the product 1 (workpiece) with a wire, so that the plan portion 1a is cut. The position of the product 1 and the end 7a of the insert 7 which is the end of the workpiece receiving surface that functions as the cutting edge of the lower mold 4 can be fixed. Then, in a state where the escape of the product 1 does not occur, shearing is caused from the upper surface of the product by the upper die 2. Then, as shown in FIG. 1, the shear surface 3 formed on the product by the upper die cutting edge 2 does not reach the deep part of the product 1, and the line contact portion with the product 1 of the insert 7 of the lower die 4. It becomes possible to induce a break in the product 1 using (7a) as a fulcrum. Then, the fracture surface 5 can be guided from the tip of the shearing surface 3 to the line contact portion (7a) of the insert 7 of the lower mold 4 with the product 1 . At this time, the angle formed by the shear surface 3 and the fracture surface 5 is nearly parallel, and it is possible to avoid the formation of the acute edge E (FIG. 5) on the cut surface.

しかも、下型4のワーク受面4bの端部を切欠き、下型4に段部6を形成することで、下型4に入子7の設置場所を確保することができる。また、段部6に設けられた入子7とワーク受面4bとが連続面を形成することなく、下型4の端部では、製品1に対し入子7の端部7aのみを線接触させることが可能となる。したがって、トリミング工程中において、製品1と、下型4の切刃として機能する入子7との位置を固定し、製品の逃げが生じないようにすることができる。
また、入子7の製品1との線接触部(7a)が摩耗により劣化した場合には、図3(b)に示すように、入子7の突出量を増大させ、かつ、増大した突出部分を削り出すことにより、再び入子とワークとの接触部(7a’)を線接触させることが可能となり、さらに、必要に応じて入子7を新しい入子と交換することによって、入子7の切刃としての機能を常に維持することが可能となる。
In addition, the end of the workpiece receiving surface 4 b of the lower mold 4 is cut out and the step 6 is formed in the lower mold 4, whereby the installation place of the insert 7 can be secured in the lower mold 4. Further, the insert 7 provided in the step portion 6 and the workpiece receiving surface 4b do not form a continuous surface, and at the end of the lower mold 4, only the end 7a of the insert 7 is in line contact with the product 1 It becomes possible to make it. Therefore, during the trimming process, the position of the product 1 and the nest 7 that functions as the cutting edge of the lower mold 4 can be fixed so that the product does not escape.
Further, when the line contact portion (7a) of the insert 7 with the product 1 deteriorates due to wear, as shown in FIG. 3 (b), the protrusion amount of the insert 7 is increased and the protrusion is increased. By cutting out the part, the contact portion (7a ') between the insert and the workpiece can be brought into line contact again, and if necessary, the insert 7 is replaced with a new insert. It is possible to always maintain the function as the cutting blade 7.

以上のごとく、本発明の実施の形態によれば、上下型間で鋳造品の方案部を切断する際に、製品1を線受けする入子7を下型4に設置し、上型の切刃2と入子7とで製品1を切断するとき、せん断、破断により切断面の鋭角化を防止することが可能となる。よって、後仕上加工をすることなく、寸法精度の高い製品を得ることが可能となる。その結果として、製品に対する切刃の投入角の如何にかかわらず、外径寸法精度が要求される鋳造製品を、低コストで提供することが可能となる。
また、下型4からの入子7の突出量を変更して摩耗部分を削り出し、若しくは、入子7を交換することで、トリミング作業によって消耗する金型の保全を容易に行うことが可能となる。
As described above, according to the embodiment of the present invention, when the plan part of the cast product is cut between the upper and lower molds, the insert 7 for receiving the product 1 is installed in the lower mold 4 to cut the upper mold. When the product 1 is cut with the blade 2 and the insert 7, it becomes possible to prevent the cut surface from being sharpened by shearing or breaking. Therefore, it is possible to obtain a product with high dimensional accuracy without post finishing. As a result, it is possible to provide a cast product requiring outer diameter dimensional accuracy at a low cost regardless of the insertion angle of the cutting edge with respect to the product.
In addition, by changing the amount of protrusion of the insert 7 from the lower mold 4, the worn portion is cut out or the insert 7 is replaced, so that it is possible to easily maintain the mold consumed by the trimming operation. It becomes.

本発明の実施の形態に係るトリミング装置によって、製品の方案部を切断・除去する様子を示す模式図である。It is a schematic diagram which shows a mode that the design part of a product is cut and removed by the trimming apparatus which concerns on embodiment of this invention. 図1に示すトリミング装置において、製品の方案部と下型との位置関係を平面図で示したものである。In the trimming apparatus shown in FIG. 1, the positional relationship between the product design part and the lower mold is shown in a plan view. 図1に示すトリミング装置における、入子の改修作業の手順を示す説明図である。It is explanatory drawing which shows the procedure of the repair work of a nesting in the trimming apparatus shown in FIG. 従来のトリミング装置によって、製品の方案部を切断・除去する様子を示す模式図である。It is a schematic diagram which shows a mode that the design part of a product is cut and removed by the conventional trimming apparatus. 図4に示す従来のトリミング装置より形成された、切断面の鋭角エッジを示す図である。It is a figure which shows the acute angle edge of a cut surface formed from the conventional trimming apparatus shown in FIG.

1:製品、2:切刃、3:せん断面、4:下型、4a:端部、4b:ワーク受面、5:破断面、7:入子、 7a、7a’:端部   1: Product, 2: Cutting edge, 3: Shear surface, 4: Lower die, 4a: End, 4b: Workpiece receiving surface, 5: Fracture surface, 7: Insert, 7a, 7a ': End

Claims (2)

上下型により鋳造品の方案部を切断・除去するトリミング装置であって、下型の、端部へ向かって下がる傾斜面であるワーク受面の端部を切欠き、それによって形成された段部に入子を設け、該入子と、下型のワーク受面とが連続面を形成することなく、前記下型のワーク受面の端部ではワークに対し前記入子の端部のみが線接触することで、鋳造品の逃げが生じないようにした状態で、上型の切刃によりワーク上面からせん断を起こさせることで、鋳造品と上型の切刃とが、互いに逃げるように変位して、せん断面が下型のワーク受け面の端部から遠ざかるように形成されることなく、前記入子の端部と前記ワークとの線接触部を支点としてワークに破断を誘発させて、前記線接触部へと破断面を誘導するように構成したことを特徴とする鋳造品のトリミング装置。 A trimming device for cutting and removing the scheme portion of the casting by the vertical type, the lower mold,-out the end portion of the workpiece abutment notch is an inclined surface descending towards the end, stage formed by it parts to provide a nest, and該入Ko without and the lower mold of the workpiece-receiving surface to form a continuous surface at the end of the lower die of the workpiece-receiving surface is only the end of the entering child to work In a state where the cast product does not escape by making line contact, the cast product and the upper die cutting blade can escape from each other by causing shearing from the upper surface of the workpiece by the upper die cutting blade. displaced by, without being formed away from the end portion of the lower mold of the work receiving surface shear plane, to induce fracture in the work line contact portion between the the end portion of the insert work as a fulcrum and , Wherein the fracture surface is guided to the line contact portion. Castings of the trimming device. 前記段部に、ワークを線で受ける入子を、段部からの突出量を調整可能に設けたことを特徴とする請求項1記載の鋳造品のトリミング装置。 2. The cast product trimming apparatus according to claim 1, wherein a nest for receiving a workpiece with a wire is provided in the step portion so that a protruding amount from the step portion can be adjusted.
JP2003345758A 2003-10-03 2003-10-03 Casting trimming equipment Expired - Fee Related JP4365181B2 (en)

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JP4365181B2 true JP4365181B2 (en) 2009-11-18

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