JP4936123B2 - Method and apparatus for shot blasting products to be processed having grooves - Google Patents
Method and apparatus for shot blasting products to be processed having grooves Download PDFInfo
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- JP4936123B2 JP4936123B2 JP2007036130A JP2007036130A JP4936123B2 JP 4936123 B2 JP4936123 B2 JP 4936123B2 JP 2007036130 A JP2007036130 A JP 2007036130A JP 2007036130 A JP2007036130 A JP 2007036130A JP 4936123 B2 JP4936123 B2 JP 4936123B2
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- 238000005422 blasting Methods 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 claims description 76
- 230000005855 radiation Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000003795 desorption Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 238000005266 casting Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 240000006829 Ficus sundaica Species 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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Description
本発明は溝部を有する被処理製品のショットブラスト方法および装置に関する。さらに詳しくは、本発明は、溝部を有する被処理製品、たとえば鋳造後の鋳造品の溝内部に形成されたバリなどの異物をショットブラスト処理により効率的に除去し、製品の品質を向上する被処理製品のショットブラスト方法および装置に関する。 The present invention relates to a method and apparatus for shot blasting a product to be processed having a groove. More specifically, the present invention relates to a product to improve the quality of a product having a groove part, for example, a foreign matter such as a burr formed inside a groove of a cast product after casting is efficiently removed by shot blasting. The present invention relates to a shot blasting method and apparatus for processed products.
従来より、被処理製品としての圧縮コイルばねに投射材を投射して、被処理製品に付着した異物を除去するためや、圧縮残留応力を付与するためにショット処理がされている(特許文献1参照)。 Conventionally, shot processing has been performed to project a projection material onto a compression coil spring as a product to be processed to remove foreign matter adhering to the product to be processed, or to apply compressive residual stress (Patent Document 1). reference).
しかしながら、溝部を有する鋳造品の金属製品に対してショットブラスト処理を行う場合、溝部のように開口部が狭く、かつ深さが深い部位については、投射材が溝部に溜まりやすい。このため、溜まった投射材が処理の妨げになり投射された投射材が奥まで入ることが困難となり、バリなどの異物を効率よく除去することができなかった。 However, when shot blasting is performed on a cast metal product having a groove, the projection material tends to accumulate in the groove at a portion where the opening is narrow and the depth is deep like the groove. For this reason, the accumulated projection material hinders the processing, and it becomes difficult for the projected projection material to enter deeply, and foreign matters such as burrs cannot be efficiently removed.
そこで、本発明は、叙上の事情に鑑み、溝部を有する鋳造品などの被処理製品の溝内部に形成されたバリなどの異物をショットブラスト処理により効率的に除去し、製品の品質を向上する被処理製品のショットブラスト方法および装置を提供することを目的とする。 Therefore, in view of the above circumstances, the present invention efficiently removes foreign matters such as burrs formed in the groove of a product to be processed such as a cast product having a groove by shot blasting, and improves the quality of the product. An object of the present invention is to provide a shot blasting method and apparatus for a product to be processed.
本発明のショットブラスト方法は、溝部を有する被処理製品のショットブラスト方法であって、被処理製品の外側に形成された大きなバリを除去するため、被処理製品を回転させ投射材を遠心投射装置によって被処理製品に投射する外部バリ除去工程と、被処理製品の溝部の内部に形成された異物を除去するため、圧縮エアと投射材を同時に噴射させるエアノズルを用い、圧縮エアで被処理製品の溝部の内部へブローすることによって溝部の内部に溜まった投射材を排出しながら処理することにより、溜まった投射材によって妨げられることなく投射材を被処理製品に投射する内部バリ除去工程とを含むことを特徴としている。 The shot blasting method of the present invention is a shot blasting method of a product to be processed having a groove portion, and in order to remove a large burr formed on the outside of the product to be processed, the product to be processed is rotated and the projection material is centrifuged. In order to remove the foreign matter formed inside the groove of the product to be treated and the external burr removal process to project on the product to be treated by the air nozzle that simultaneously jets the compressed air and the projection material , An internal burr removal step of projecting the projection material onto the product to be processed without being hindered by the accumulated projection material by processing while discharging the projection material accumulated in the groove portion by blowing into the groove portion It is characterized by that .
また、本発明のショットブラスト装置は、溝部を有する被処理製品のショットブラスト装置であって、投射材を被処理製品に投射する投射室本体と、投射室本体の内部に配置されライナーによって放射線上に3つに区切られた脱着ゾーン、外部バリ除去ゾーンおよび内部バリ除去ゾーンの処理ブースを具備し放射線の交点を中心軸に回転する回転ブースと、回転ブースの各処理ブースに配置され被処理製品を保持し被処理製品を中心に回転する機構を持つ回転ケージと、投射室本体の外側に配置され外部バリ除去ゾーンに位置する処理ブースに設置された被処理製品へ投射材を投射する遠心投射装置と、内部バリ除去ゾーンに位置する処理ブースに位置する被処理製品へ圧縮エアを用いて投射材を噴射するエアノズルと、圧縮エア供給装置にエア配管によって接続され投射材を加圧しながら貯蔵する加圧タンクと、加圧タンクに貯蔵された投射材と圧縮エアを混合するミキシングバルブと、加圧タンクとミキシングバルブを接続する配管に設置された噴射量調整バルブと、ミキシングバルブとエアノズルを接続する輸送ホースと、遠心投射装置および加圧タンクに供給する投射材を貯蔵する貯蔵ホッパーと、遠心投射装置および加圧タンクと貯蔵ホッパーを接続する接続管と、各接続管に配置され貯蔵ホッパーから遠心投射装置および加圧タンクへ供給される投射材の量を調整する投射量調整ゲートと、投射されて投射室本体の下部に溜まった投射材を再び貯蔵ホッパーへ輸送する投射材循環装置とを備えてなるからなることを特徴としている。 Further, the shot blasting apparatus of the present invention is a shot blasting apparatus for a product to be processed having a groove portion, and includes a projection chamber body for projecting a projection material onto the product to be processed, a radiation chamber disposed on the inside of the projection chamber body by a liner. A rotating booth that has processing booths of a desorption zone, an external deburring zone, and an internal deburring zone that are divided into three, and that rotates around the intersection of radiation, and a product to be processed that is placed in each processing booth of the rotating booth A rotating cage with a mechanism that holds the workpiece and rotates around the product to be processed, and centrifugal projection that projects the projection material to the product to be processed installed in the processing booth located outside the projection chamber body and located in the external deburring zone An apparatus, an air nozzle that injects a projection material using compressed air to a product to be processed located in a processing booth located in an internal deburring zone, and a compressed air supply device. A pressure tank connected by piping to store the projection material while pressurizing, a mixing valve for mixing the projection material stored in the pressure tank and compressed air, and a piping connecting the pressure tank and the mixing valve. Connecting the injection amount adjusting valve, the transport hose connecting the mixing valve and the air nozzle, the storage hopper for storing the projection material supplied to the centrifugal projection device and the pressurized tank, and the centrifugal projection device, the pressurized tank and the storage hopper A connection pipe, a projection amount adjustment gate that adjusts the amount of projection material that is arranged in each connection pipe and is supplied from the storage hopper to the centrifugal projection device and the pressurized tank, and a projection material that is projected and collected at the bottom of the projection chamber body It is characterized by comprising a projection material circulating device for transporting the liquid to the storage hopper again.
本発明によれば、投射材を遠心投射装置によって被処理製品に投射することによって被処理製品の外側に形成された大きなバリを除去できるとともに、圧縮エアで被処理製品の溝部の内部へブローすることによって溝部の内部に溜まった投射材を排出しながら処理することにより、溜まった投射材によって妨げられることなく被処理製品の溝部の内部に形成された小さなバリなどの異物を除去することができる。 According to the present invention, large burrs formed on the outside of the product to be processed can be removed by projecting the projection material onto the product to be processed by the centrifugal projection device, and blown into the groove of the product to be processed with compressed air. By processing while discharging the projection material collected inside the groove portion, foreign matters such as small burrs formed inside the groove portion of the product to be processed can be removed without being blocked by the collected projection material. .
また、内部バリ除去工程において、エアノズルの噴射を利用し圧縮エアとともに投射材を同時に噴射させることにより、装置の構成を簡略化することができる。
また、内部バリ除去工程では、圧縮エアのブローにより投射材が溝部に溜まる量が少ないため、被処理製品の溝部に集中して投射される位置に被処理製品の回転を停止させ処理させると処理時間の短縮を図ることができる。
Further, in the internal burr removal step, the configuration of the apparatus can be simplified by using the injection of the air nozzle and simultaneously injecting the projection material together with the compressed air.
In addition, in the internal burr removal process, since the amount of projection material that accumulates in the groove due to the blow of compressed air is small, processing is performed when the rotation of the product to be processed is stopped at the position where the projection is concentrated and projected in the groove of the product to be processed. Time can be shortened.
以下、添付図面に基づいて本発明の溝部を有する被処理製品のショットブラスト装置を説明する。本発明は、被処理製品、たとえば鋳造品や、機械加工された製品の溝部に形成されたバリを除去するために適用することができ、本実施の形態にかかわるショット処理装置は、図1および2に示されるように、投射材Sを被処理製品1に投射する投射室本体2と、投射室本体2の内部(投射室)に配置されライナーによってブースとして、3方向である放射線上に3つに区切られ3つの処理ブース4を具備し放射線の交点を中心軸Cに回転する回転ブース5と、回転ブース5の各処理ブース4に配置され被処理製品1を保持し被処理製品1を中心に回転する機構を持つ回転ケージ6と、投射室本体2の外側に配置され外部バリ除去ゾーン21に位置する処理ブース4に設置された被処理製品1へ投射材Sを投射する遠心投射装置7と、内部バリ除去ゾーン22に位置する処理ブース4に位置する被処理製品1へ圧縮エアを用いて投射材Sを噴射するエアノズル8と、圧縮エア供給装置Pにエア配管P1によって接続され投射材Sを加圧しながら貯蔵する加圧タンク9と、加圧タンク9に貯蔵された投射材Sと圧縮エアを混合するミキシングバルブ10と、加圧タンク9とミキシングバルブ10を接続する配管に設置された噴射量調整バルブ11と、ミキシングバルブ10とエアノズル8を接続する輸送ホース12と、遠心投射装置7および加圧タンク9に供給する投射材Sを貯蔵する貯蔵ホッパー13と、遠心投射装置7および加圧タンク9と貯蔵ホッパー13を接続する接続管14と、各接続管14に配置され貯蔵ホッパー13から遠心投射装置7および加圧タンク9へ供給される投射材Sの量を調整する投射量調整ゲート15と、投射されて投射室下部に溜まった投射材Sを再び貯蔵ホッパー13へ輸送する投射材循環装置16が設置されている。 Hereinafter, a shot blasting apparatus for a product having a groove portion according to the present invention will be described with reference to the accompanying drawings. The present invention can be applied to remove burrs formed in a groove of a product to be processed, such as a cast product or a machined product, and the shot processing apparatus according to the present embodiment is shown in FIG. As shown in FIG. 2, the projection chamber body 2 that projects the projection material S onto the product 1 to be processed, and the inside of the projection chamber body 2 (projection chamber) is set as a booth by a liner, and the radiation 3 in three directions. A rotating booth 5 which is divided into two and has three processing booths 4 and rotates at the intersection of the radiations about the central axis C, and is disposed in each processing booth 4 of the rotating booth 5 to hold the processed products 1 and hold the processed products 1 A rotary cage 6 having a mechanism that rotates in the center, and a centrifugal projection device that projects a projection material S onto a product 1 to be processed disposed in a processing booth 4 disposed outside the projection chamber body 2 and positioned in an external deburring zone 21 7 and internal bar An air nozzle 8 for injecting the projection material S using compressed air to the product 1 to be processed located in the treatment booth 4 located in the removal zone 22, and a compressed air supply device P connected to the compressed air supply device P by an air pipe P1 to pressurize the projection material S. The pressurized tank 9 stored while being mixed, the mixing valve 10 for mixing the projection material S stored in the pressurized tank 9 and the compressed air, and the injection amount adjustment installed in the piping connecting the pressurized tank 9 and the mixing valve 10 A valve 11, a transport hose 12 that connects the mixing valve 10 and the air nozzle 8, a storage hopper 13 that stores the projection material S supplied to the centrifugal projection device 7 and the pressurized tank 9, and the centrifugal projection device 7 and the pressurized tank 9 Are connected to the centrifugal projection device 7 and the pressurized tank 9 from the storage hopper 13. A projection amount adjusting gate 15 for adjusting the amount of projection material S, projection material circulating apparatus 16 is installed to transport shot material S that has accumulated in the projection chamber bottom is projected back into a storage hopper 13.
図1において、投射材循環装置16は、投射本体2の下部に設置されたスクリューコンベア17と、スクリューコンベア17の片側に設置されたバケットエレベータ18と、バケットエレベータ上部の投射材投げ出し部19に設置されたロータリースクリーン20とを具備している。 In FIG. 1, the projection material circulation device 16 is installed in a screw conveyor 17 installed in the lower part of the projection main body 2, a bucket elevator 18 installed on one side of the screw conveyor 17, and a projection material throwing unit 19 in the upper part of the bucket elevator. The rotary screen 20 is provided.
被処理製品1は、脱着ゾーン23において作業者Mまたはロボットにより回転ケージ6に設置される。回転ブース5が1/3回転し、被処理製品1は外部バリ除去ゾーン21へ移り、回転ケージ6により回転されながら遠心投射装置7によって投射される(外部バリ除去工程)。投射された後、回転ブース5が再び1/3回転し、被処理製品1は内部バリ除去ゾーン22へ移り、回転ケージ6によって被処理製品1の溝部が投射方向に向くよう回転されたのち停止、固定されエアノズル8によって噴射される圧縮エアと投射材Sによって処理される(内部バリ除去工程)。ここで、外部バリ除去工程によって溝部には投射材Sが溜まっているため、投射材Sを噴射する前に圧縮エアのみを噴射し溝部に溜まった投射材Sを除去するのが望ましい。投射された後、回転ブース5が再び1/3回転し、被処理製品1は脱着ゾーン23へ戻される。
投射材Sは、遠心投射装置7およびエアノズル8から投射され、投射室本体2の下部に集められたのち、該投射室本体2と接続されたスクリューコンベア17によりバケットエレベータ18に輸送される。ついで、バケットエレベータ18によって上部まで輸送された投射材は、投射材投げ出し部19を通りロータリースクリーン20に送られスクリーンを抜けた正常投射材は貯蔵ホッパー13に貯蔵される。ここで、スクリーンから抜けない大きな物、すなわちバリなどの異物は機外へ排出される。貯蔵ホッパー13に貯蔵された投射材Sは投射量調整ゲート15にて投射量を調節されたのち、再び接続管14を通り、遠心投射装置7および加圧タンク9に送られる。遠心投射装置7に送られた投射材Sはそこで再び投射される。一方加圧タンク9に送られた投射材Sは、加圧タンク9内で圧縮エアと共に貯蔵され噴射量調整バルブ11によって噴射量が調節されミキシングバルブ10へ供給される。ミキシングバルブ10で噴射エアと混合された後、輸送ホース12を通りエアノズル8から投射される。
The product 1 to be processed is placed in the rotating cage 6 by the worker M or robot in the detachment zone 23. The rotary booth 5 rotates 1/3, the product 1 to be processed moves to the external deburring zone 21 and is projected by the centrifugal projection device 7 while being rotated by the rotating cage 6 (external deburring step). After the projection, the rotary booth 5 rotates again by 1/3, the product 1 to be processed moves to the internal burr removal zone 22, and stops after the rotating cage 6 rotates the groove of the product 1 to be directed in the projection direction. The compressed air jetted by the air nozzle 8 and the projection material S are processed (internal burr removing step). Here, since the projection material S is accumulated in the groove portion by the external burr removing step, it is desirable to eject only the compressed air and remove the projection material S accumulated in the groove portion before injecting the projection material S. After the projection, the rotary booth 5 rotates again by 1/3, and the product 1 is returned to the desorption zone 23.
The projection material S is projected from the centrifugal projection device 7 and the air nozzle 8, collected at the lower part of the projection chamber body 2, and then transported to the bucket elevator 18 by the screw conveyor 17 connected to the projection chamber body 2. Next, the projection material transported to the upper part by the bucket elevator 18 is sent to the rotary screen 20 through the projection material throwing-out portion 19, and the normal projection material that has passed through the screen is stored in the storage hopper 13. Here, large objects that cannot be removed from the screen, that is, foreign matters such as burrs are discharged outside the apparatus. The projection material S stored in the storage hopper 13 is adjusted in the projection amount by the projection amount adjusting gate 15, and then again passes through the connection pipe 14 and is sent to the centrifugal projection device 7 and the pressurized tank 9. The projection material S sent to the centrifugal projection device 7 is projected again there. On the other hand, the projection material S sent to the pressurizing tank 9 is stored together with the compressed air in the pressurizing tank 9, the injection amount is adjusted by the injection amount adjusting valve 11, and supplied to the mixing valve 10. After being mixed with the jet air by the mixing valve 10, it passes through the transport hose 12 and is projected from the air nozzle 8.
なお、本実施の形態ではブースとして、各処理ブースが放射線上に3つに区切られ、放射線の交点を中心軸に回転する回転ブースにされているが、本発明においては、3つに区切られた処理ブースを具備していれば、これに限定されるものではなく、処理ブースを並列配置や縦配置など適宜選定することができる。
また、本実施の形態では、遠心投射装置7が2台使用されているが、本発明においては、これに限定されるものではなく、台数は適宜選定することができる。また、本実施の形態では、圧縮エアと投射材を同時に噴射させるエアノズルを用いているが、本発明においては、これに限定されるものではなく、圧縮エアと投射材をそれぞれ別個に噴射させる機構、たとえば遠心投射装置と、圧縮エアを噴射させるエアブローノズルとからなる機構を用いることができる。また、本実施の形態では、投射材が溝部へ向く位置で被処理製品が停止するようにしているが、本発明においては、これに限定されるものではなく、たとえば溝が縦横に配置されている被処理製品に対しては、被処理製品を回転しながら投射することができる。
さらに、本実施の形態の溝部を有する被処理製品のショットブラスト装置において、投射材循環装置16は投射室本体2の下部に溜まった投射材Sを貯蔵ホッパー13へ輸送できれば、バケットエレベータ18を用いたものに限定されるものではなく、たとえばベルトコンベアーや、スクリューコンベア、空気輸送パイプなどを適宜用いた投射材循環装置とすることができる。
また、投射材循環装置16には投射材に混入したバリなどの異物を除去するために投射材分別装置が設置されているのが好ましい。この投射材分別装置としては、バリと投射材が分別できるものであれば、本発明において、とくに限定されるものではないが、たとえば風撰式セパレータや、振動フルイ、ロータリースクリーンなどを適宜用いることができる。
また、本発明が適用される溝部を有する被処理製品は、溝部の開口部が大きい金属部品はもちろん、開口部の最小間口が狭く、深さが深い形状、具体的には、深さ/最小開口長さが5〜20である溝、細穴などを有する金属部品などとすることができる。また、除去対象はバリに限定されるものでなく、砂、スケールなど被処理製品にとって不必要な異物の除去を目的としていればいずれでも良い。
In this embodiment, as the booth, each processing booth is divided into three on the radiation and is a rotating booth that rotates around the intersection of the radiation, but in the present invention, it is divided into three. However, the present invention is not limited to this, and the processing booth can be appropriately selected such as a parallel arrangement or a vertical arrangement.
In the present embodiment, two centrifugal projection devices 7 are used. However, the present invention is not limited to this, and the number can be selected as appropriate. In this embodiment, an air nozzle that simultaneously injects compressed air and a projection material is used. However, the present invention is not limited to this, and a mechanism that injects compressed air and a projection material separately. For example, a mechanism including a centrifugal projection device and an air blow nozzle that ejects compressed air can be used. In the present embodiment, the product to be processed is stopped at the position where the projection material faces the groove. However, the present invention is not limited to this. For example, the grooves are arranged vertically and horizontally. The product to be processed can be projected while rotating the product to be processed.
Furthermore, in the shot blasting apparatus for the product to be processed having the groove portion of the present embodiment, the projection material circulating device 16 can use the bucket elevator 18 if the projection material S accumulated in the lower part of the projection chamber body 2 can be transported to the storage hopper 13. However, the present invention is not limited thereto, and for example, a projection material circulation device using a belt conveyor, a screw conveyor, an air transport pipe, or the like can be used.
Moreover, it is preferable that a projection material sorting device is installed in the projection material circulation device 16 in order to remove foreign matters such as burrs mixed in the projection material. The blasting material separation device is not particularly limited in the present invention as long as the burrs and the blasting material can be separated. For example, a wind separator, a vibrating screen, a rotary screen, or the like is appropriately used. Can do.
In addition, a product to be processed having a groove to which the present invention is applied is not only a metal part having a large opening in the groove, but also a shape having a narrow minimum opening and a deep depth, specifically, depth / minimum. It can be set as the metal component etc. which have a groove | channel, a fine hole, etc. whose opening length is 5-20. Further, the removal target is not limited to burrs, and any may be used as long as it aims to remove foreign matters unnecessary for the product to be treated such as sand and scale.
つぎに、本発明の実施例を説明するが、本発明はかかる実施例に限定されるものではない。本実施例では、被処理製品としてのアルミダイカスト品(アルミニウムを主成分とする鋳物)の鋳造時に発生する鋳バリを除去するために前記実施の形態のショットブラスト装置を使用する。ここで、アルミダイカスト品の大きさは縦寸法が300mm、横寸法が200mmおよび厚さが50mmである。また、アルミダイカスト品に形成される溝部の形状は、開口部が4mmであり、深さは40mmである。回転ケージによりアルミダイカスト品の回転数は30rpm(外部バリ除去工程)とした。投射材は平均粒径が1.0mm、平均硬度がHV100の亜鉛製の投射材を使用した。投射量は、外部バリ除去工程に用いられる投射装置である遠心投射装置(2台使用)は各130kg/min、内部バリ除去工程に用いられる投射装置であるエアノズルは10kg/minとした。ここで、圧縮エアの設定圧力は0.3MPaであり、投射時間は各工程30sに設定した。
図3に未処理のアルミダイカスト品の溝内部(深さ40mm)の状態(未処理製品)を示す。図4に外部バリ除去工程のみを施したアルミダイカスト品の溝内部(深さ40mm)の状態(一部処理製品)を示す。図5に外部バリ除去工程および内部バリ除去工程の処理を施したアルミダイカスト品の溝内部(深さ40mm)の状態(実施例)を示す。
本実施例の結果から明らかなように、外部バリ除去工程のみを施した一部処理製品(図4)は未処理製品(図3)とあまり変化がなく充分処理されていないのに対して、外部バリ除去工程および内部バリ除去工程の処理を施した実施例(図5)は投射材による打痕が充分に付着されており効率よく内部処理がされていることが分かる。
Next, examples of the present invention will be described, but the present invention is not limited to such examples. In this example, the shot blasting apparatus of the above-described embodiment is used in order to remove casting burrs generated during casting of an aluminum die cast product (a casting mainly composed of aluminum) as a product to be processed. Here, the aluminum die-cast product has a vertical dimension of 300 mm, a horizontal dimension of 200 mm, and a thickness of 50 mm. Moreover, the shape of the groove part formed in an aluminum die-cast product has an opening of 4 mm and a depth of 40 mm. The rotational speed of the aluminum die-cast product was 30 rpm (external burr removal step) by the rotating cage. The projection material used was a zinc projection material having an average particle diameter of 1.0 mm and an average hardness of HV100. The amount of projection was 130 kg / min for each of the centrifugal projection apparatuses (two units) used as the projection apparatus used in the external burr removal process, and 10 kg / min for the air nozzle used as the projection apparatus used in the internal burr removal process. Here, the set pressure of compressed air was 0.3 MPa, and the projection time was set for each step 30 s.
FIG. 3 shows a state (untreated product) inside the groove (depth 40 mm) of an untreated aluminum die-cast product. FIG. 4 shows the state (partially treated product) inside the groove (depth 40 mm) of an aluminum die cast product that has undergone only the external burr removal step. FIG. 5 shows a state (example) inside the groove (depth 40 mm) of the aluminum die-cast product subjected to the processing of the external burr removal step and the internal burr removal step.
As is clear from the results of the present example, the partially treated product (FIG. 4) subjected only to the external deburring process has not changed much from the untreated product (FIG. 3) and is not sufficiently treated. It can be seen that in the example (FIG. 5) subjected to the processing of the external burr removing step and the internal burr removing step, the dents by the projection material are sufficiently adhered and the internal processing is efficiently performed.
1 被処理製品
2 投射室本体
4 処理ブース
5 回転ブース
6 回転ケージ
7 遠心式投射装置
8 エアノズル
9 加圧タンク
10 ミキシングバルブ
11 噴射量調整バルブ
12 輸送ホース
13 貯蔵ホッパー
14 接続管
15 投射量調整ゲート
16 投射材循環装置
17 スクリューコンベア
18 バケットエレベータ
19 投射材投げ出し部
20 ロータリースクリーン
21 外部バリ除去ゾーン
22 内部バリ除去ゾーン
23 脱着ゾーン
P 圧縮エア供給装置
S 投射材
1 Product to be treated 2 Projection chamber body 4 Processing booth 5 Rotating booth 6 Rotating cage 7 Centrifugal projection device 8 Air nozzle 9 Pressurizing tank 10 Mixing valve 11 Injection amount adjusting valve 12 Transport hose 13 Storage hopper 14 Connection pipe 15 Projection amount adjusting gate 16 Projection Material Circulation Device 17 Screw Conveyor 18 Bucket Elevator 19 Projection Material Throwing Portion 20 Rotary Screen 21 External Burr Removal Zone 22 Internal Burr Removal Zone 23 Desorption Zone P Compressed Air Supply Device S Projection Material
Claims (3)
被処理製品の外側に形成された大きなバリを除去するため、被処理製品を回転させ投射材を遠心投射装置によって被処理製品に投射する外部バリ除去工程と、
被処理製品の溝部の内部に形成された異物を除去するため、圧縮エアと投射材を同時に噴射させるエアノズルを用い、圧縮エアで被処理製品の溝部の内部へブローすることによって溝部の内部に溜まった投射材を排出しながら処理することにより、溜まった投射材によって妨げられることなく投射材を被処理製品に投射する内部バリ除去工程
とを含むショットブラスト方法。 A shot blasting method for a product to be processed having a groove,
In order to remove large burrs formed on the outside of the product to be processed, an external burr removing step of rotating the product to be processed and projecting the projection material onto the product to be processed by the centrifugal projection device ,
In order to remove foreign matter formed inside the groove of the product to be processed, an air nozzle that simultaneously jets compressed air and a projection material is used, and the compressed air blows into the groove of the product to be processed. A shot blasting method including an internal burr removing step of projecting the projection material onto the product to be processed without being hindered by the accumulated projection material by processing the discharged projection material while discharging .
投射材を被処理製品に投射する投射室本体と、
投射室本体の内部に配置されライナーによって3つに区切られた脱着ゾーン、外部バリ除去ゾーンおよび内部バリ除去ゾーンの処理ブースを具備したブースと、
ブースの各処理ブースに配置され被処理製品を保持し被処理製品を中心に回転する機構を持つ回転ケージと、
投射室本体の外側に配置され外部バリ除去ゾーンに位置する処理ブースに設置された被処理製品へ投射材を投射する遠心投射装置と、
内部バリ除去ゾーンに位置する処理ブースに位置する被処理製品へ圧縮エアを用いて投射材を噴射するエアノズルと、
圧縮エア供給装置にエア配管によって接続され投射材を加圧しながら貯蔵する加圧タンクと、
加圧タンクに貯蔵された投射材と圧縮エアを混合するミキシングバルブと、
加圧タンクとミキシングバルブを接続する配管に設置された噴射量調整バルブと、
ミキシングバルブとエアノズルを接続する輸送ホースと、
遠心投射装置および加圧タンクに供給する投射材を貯蔵する貯蔵ホッパーと、
遠心投射装置および加圧タンクと貯蔵ホッパーを接続する接続管と、
各接続管に配置され貯蔵ホッパーから遠心投射装置および加圧タンクへ供給される投射材の量を調整する投射量調整ゲートと、
投射されて投射室本体の下部に溜まった投射材を再び貯蔵ホッパーへ輸送する投射材循環装置
とを備えてなるショットブラスト装置。 A shot blasting apparatus for a product to be processed having a groove,
A projection chamber body that projects the projection material onto the product to be treated;
A booth equipped with a processing booth for a desorption zone, an external deburring zone, and an internal deburring zone, which are arranged inside the projection chamber body and divided into three by a liner;
A rotating cage that is arranged in each processing booth of the booth and has a mechanism for holding the processed product and rotating around the processed product;
A centrifugal projection device for projecting a projection material to a product to be processed installed in a processing booth located outside the projection chamber body and located in the external deburring zone;
An air nozzle for injecting a projection material using compressed air to a product to be processed located in a processing booth located in the internal deburring zone;
A pressurized tank that is connected to the compressed air supply device by air piping and stores the projection material while being pressurized;
A mixing valve that mixes the projection material stored in the pressurized tank with the compressed air;
An injection amount adjusting valve installed in a pipe connecting the pressurized tank and the mixing valve;
A transport hose connecting the mixing valve and the air nozzle;
A storage hopper for storing the projection material supplied to the centrifugal projection device and the pressurized tank;
A connecting pipe connecting the centrifugal projection device and the pressurized tank to the storage hopper;
A projection amount adjusting gate arranged in each connecting pipe for adjusting the amount of the projection material supplied from the storage hopper to the centrifugal projection device and the pressurized tank;
A shot blasting device comprising: a projection material circulating device that transports the projection material that has been projected and accumulated in the lower part of the projection chamber main body to the storage hopper again.
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