A method for manufacturing hard-metal pressed articles includes providing a die that forms a cavity for producing a pressed article with at least one cutting edge and at least one chip breaker groove that is associated with a chip space. The step of providing the die providing a movable mold part and a movable mold body. The mold part has an operative surface, wherein the mold part at least sectionally defines the shape of a pressed article with the operative surface, and wherein the mold part is feedable in a first feed direction. The mold body has a rod-shaped operative section for producing a through-hole in the pressed article, wherein the mold body is feedable in a second feed direction. The first feed direction and the second feed direction are inclined at an angle of at least 45° to each other. The pressed article is formed from a hard-metal powder that is introduced into the cavity and compressed there in at least one main pressing direction. Forming the pressed article comprises feeding the mold part and the mold body such that the mold body is positioned in the cavity with the operative section being disposed in an abutment area on the mold part in a powder-tight relative position. A device enables the manufacture of hard-metal pressed articles.
B22F 5/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser
B22F 3/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques, caractérisée par le mode de compactage ou de frittageAppareils spécialement adaptés à cet effet
The invention relates to a method for producing hard-metal pressed articles, comprising the steps of providing a die (52, 352), which forms a cavity (54, 354) for producing a pressed article (60, 160, 260, 360) having at least one blade (64; 164, 174; 264) and at least one chip guiding stage (66; 166, 176; 266) associated with a chip space (42). The step of providing a die comprises providing a movable moulding part (92, 292, 404) which with an effective face (100, 300) defines a shape of a pressed article (60, 160, 260, 360) at least in part, the moulding part (92, 292, 404) being feedable in a first feed direction (114, 314), and providing a movable moulding body (74, 274, 374) with a rod-shaped effective portion (76, 276, 376) for producing a through-hole (62; 162, 172; 262), the rod-shaped effective portion (76, 276, 376) having, in particular, an end face (78, 278), the moulding part (74, 274, 374) being feedable in a second feed direction (110, 310). The first feed direction (114, 314) and the second feed direction (110, 310) are inclined relative to one another by an angle of at least 45°. The method also comprises a step of forming the pressed article (60, 160, 260, 360) from a hard-metal powder (86), which is introduced into the cavity (54, 354) and is compacted there in at least one main pressing direction (118), comprising feeding the moulding part (92, 292, 404) and the moulding body (74, 274, 374) in such a way that the moulding body (74, 274, 374) is positioned in the cavity (54, 354) with its effective portion (76, 276, 376) powder-tight against the moulded part (92, 292, 404) in a bearing region (124, 324). The disclosure further relates to a corresponding device for producing hard-metal pressed articles.
B22F 5/10 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser d'articles avec des cavités ou des trous, non prévue dans les sous-groupes précédents
B28B 3/08 - Fabrication d'objets façonnés en utilisant des pressesPresses spécialement adaptées à ce travail dans laquelle un poinçon exerce une pression sur le matériau dans une cavité de moulagePoinçons de forme particulière avec plusieurs poinçons par moule
B30B 11/00 - Presses spécialement adaptées à la fabrication d'objets à partir d'un matériau en grains ou à l'état plastique, p. ex. presses à briquettes ou presses à tablettes
B30B 11/02 - Presses spécialement adaptées à la fabrication d'objets à partir d'un matériau en grains ou à l'état plastique, p. ex. presses à briquettes ou presses à tablettes utilisant un pilon exerçant une pression sur le matériau dans une cavité de moulage
B30B 15/02 - MatricesGarnitures ou montures appropriéesMoules
Manufacturing hard-metal pressed articles includes providing a multi-part die comprising a plurality of lateral mold parts defining lateral surfaces of a cavity for the article. At least one of the plurality of lateral mold parts defines a portion of an upper side of the cavity. The lateral mold parts and at least two lateral punch parts are fed. At least two of the plurality of lateral mold parts are provided with a guide recess for one of the at least two lateral punch parts. A filling unit feeds an opening of the cavity which is filled with a hard-metal powder. At least one upper mold part is fed, which defines a portion of the upper side of the cavity. The lateral mold parts and the upper mold part are held to form the cavity. The powder is compressed with at least two lateral punch parts and the part demolded.
B30B 11/00 - Presses spécialement adaptées à la fabrication d'objets à partir d'un matériau en grains ou à l'état plastique, p. ex. presses à briquettes ou presses à tablettes
B23C 5/20 - Outils de fraisage caractérisés par des particularités physiques autres que la forme à taillants ou dents amovibles
B22F 5/10 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser d'articles avec des cavités ou des trous, non prévue dans les sous-groupes précédents
B22F 5/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser
4.
METHOD AND DEVICE FOR PRODUCING A HARD-METAL PRESSED ARTICLE, AND HARD-METAL PRESSED ARTICLE
The invention relates to a method for the near-net-shape production of hard-metal pressed articles, comprising the following steps: providing a multi-part matrix (82) having a plurality of lateral mould parts (90, 92, 94, 96); supplying the lateral mould parts (90, 92, 94, 96); supplying at least two lateral punch parts (100, 102, 104, 106), wherein at least two lateral mould parts (90, 92, 94, 96) are provided with a guide recess (110, 112, 114, 116) for a lateral punch part (100, 102, 104, 106); supplying a filling unit (152) via an opening of the cavity (86) and filling the cavity (86) with a hard-metal powder; supplying at least one mould upper part (122) that defines a section of the upper side (192) of the cavity (86); securing the lateral mould parts (90, 92, 94, 96) and the mould upper part (122); compressing the powder with the at least two lateral punch parts (100, 102, 104, 106); and opening the lateral mould parts (90, 92, 94, 96), the mould upper part (122) and the punch parts (100, 102, 04, 106) in order to remove the pressed article (10) from the mould. The invention also relates to a corresponding device (80) and to a hard-metal pressed article (10).
B22F 5/10 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser d'articles avec des cavités ou des trous, non prévue dans les sous-groupes précédents
B28B 3/08 - Fabrication d'objets façonnés en utilisant des pressesPresses spécialement adaptées à ce travail dans laquelle un poinçon exerce une pression sur le matériau dans une cavité de moulagePoinçons de forme particulière avec plusieurs poinçons par moule
B30B 11/00 - Presses spécialement adaptées à la fabrication d'objets à partir d'un matériau en grains ou à l'état plastique, p. ex. presses à briquettes ou presses à tablettes
B30B 15/02 - MatricesGarnitures ou montures appropriéesMoules
The invention relates to a method and to a device for producing a hard-metal pressed article, and to a hard-metal pressed article. The method comprises the following steps: providing a multi-part die (46), comprising: feeding at least one frontal shaped part (54, 56), which can be moved in a first plane; feeding at least one transverse shaped part (64, 66), which can be moved in a second plane; locking the at least one frontal shaped part (54, 56) and the at least one transverse shaped part (64, 66) in order to define a cavity (48) for a blank (10), wherein feeding directions of the at least one frontal shaped part (54, 56) and of the at least one transverse shaped part (64, 66) are oriented at an angle to each other, preferably perpendicular to each other, wherein the at least one frontal shaped part (54, 56) and the at least one transverse shaped part (64, 66) define surfaces (30, 32) of the blank (10), and wherein the resulting cavity (48) has at least one opening (50), through which a punch (74, 76) can be inserted; feeding a filling shoe (132) via an opening (50) of the cavity (48) and filling the cavity (48) with a hard-metal powder; and compacting the powder with at least one punch (74, 76), which can be moved parallel to a main pressing direction (Z), wherein the feeding of the at least one transverse shaped part (64, 66) occurs in a feeding direction (104, 106) that is parallel to the main pressing direction (Z).
B30B 11/00 - Presses spécialement adaptées à la fabrication d'objets à partir d'un matériau en grains ou à l'état plastique, p. ex. presses à briquettes ou presses à tablettes
B30B 15/02 - MatricesGarnitures ou montures appropriéesMoules
C22C 29/00 - Alliages à base de carbures, oxydes, borures, nitrures ou siliciures, p. ex. cermets, ou d'autres composés métalliques, p. ex. oxynitrures, sulfures
B22F 5/00 - Fabrication de pièces ou d'objets à partir de poudres métalliques caractérisée par la forme particulière du produit à réaliser
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