JP2011056579A - Method for producing casting, method for producing casting mold, and casting mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To highly-accurately mold a casting. <P>SOLUTION: The position of a point on the model surface of a casting in a three-dimensional space is measured using a 3D scanner 32, and the position data indicating the point position is acquired. By using the position data, a processing program for cutting is generated by a CAD/CAM system 33. A casting mold is made by cutting a resin having the maximum allowable working temperature of 250°C or higher and Rockwell hardness of R20 or higher by an NC cutting processor 34 using the processing program. Then, the casting is produced using a cast processing machine 35 by casting in the casting mold, lead, tin or zinc, or an alloy comprising lead, tin or zinc as main components. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a casting manufacturing method, a mold manufacturing method, and a mold, and more particularly, to a casting manufacturing method, a mold manufacturing method, and a mold that can mold a casting with higher accuracy.

  Conventionally, many metal jigs and railroad models, which are a type of pseudo bait used for fishing, are molded by casting lead or zinc.

  FIG. 1 is a diagram for explaining a conventional manufacturing method such as a metal jig or a railway model. Gypsum is poured around the prototype model 11, the model 11 is molded, and a gypsum mold 12 is created. Then, by pouring urethane resin into the plaster mold 12, a male mold 13 having a shape corresponding to the model 11 is created. Further, silicon resin is poured into the periphery of the male mold 13 to solidify, and the mold 14 is made of silicon rubber (silicon resin). The mold 14 is a so-called mass production type. Further, lead, zinc or the like is cast into the mold 14 to form a final product 15 which is a casting.

  Conventionally, a photorealistic subject such as a photograph or a picture is read by a scanner, converted into digital data by a computer, an image correction is applied to the digital data to form a negative film, and the negative film is formed into a printing plate by photolithography. It has also been proposed to manufacture precious metal accessories, particularly pendants and rings, by the lost wax casting method using the printing plate as a part of the original pattern (see, for example, Patent Document 1).

JP 2002-101930 A

  However, there is usually a difference of about 10% between the shape of the model 11 and the shape of the product 15 on the basis of the length. This is because the gypsum mold 12, the male mold 13, and the mold 14 contract in the manufacturing process. In each of the three-dimensional directions, the contraction rate is not constant and varies depending on the shape of the model 11 (product 15). Therefore, the shape of the product 15 is often twisted in the shape of the model 11.

  Therefore, the model 11 is made in consideration of the shrinkage in the gypsum mold 12, the male mold 13, and the mold 14 from the shape of the product 15 to be finally obtained. The shape of the model 11 is determined empirically from the shape of the product 15.

  However, even if a design drawing of the product 15 is drawn, it is extremely difficult to reduce the error of the product 15 to 1% or less by the conventional manufacturing method. In particular, edges and fine lines are crushed, and it is difficult to form straight lines and surfaces with a constant curvature (uniform surfaces). Although it is conceivable to cut or polish the mold 14 at the stage of producing the mold 14 formed of silicon rubber, the mold 14 is cut so as to be broken into grains, and thus cannot be formed into a desired shape. Furthermore, even if the mold 14 is molded with high accuracy, the mold 14 is formed of silicon rubber. Therefore, when lead or zinc having a relatively high density is poured, the mold 14 is deformed.

  Even if the invention described in Patent Document 1 is used, it is difficult to accurately manufacture a noble metal accessory for a subject.

  This invention is made | formed in view of such a condition, and enables it to shape | mold a casting more accurately.

  The casting production method according to the first aspect of the present invention is a production method for producing a casting formed of lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component. A step of measuring a position of a surface point of the model of the model in a three-dimensional space, obtaining position data indicating the position of the point, and a generating step of generating a machining program for cutting using the position data And a cutting step in which a mold is formed by cutting a resin having a maximum operating temperature of 250 ° C. or more and a Rockwell hardness of R20 or more using the processing program, and lead, tin, zinc, or lead And a casting step of casting an alloy mainly composed of tin or zinc into the mold.

  In the generating step, the processing data can be generated from the surface data by converting the position data into surface data indicating the surface of the model and indicating a surface in a three-dimensional space.

  In the cutting step, the mold can be formed by cutting fluororesin or polyimide using the processing program.

  A mold manufacturing method according to a second aspect of the present invention is a manufacturing method for manufacturing a mold for casting lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component. A measurement step of measuring a position of a surface point of the surface in a three-dimensional space, obtaining position data indicating the position of the point, and a generation step of generating a machining program for cutting using the position data; And a cutting step of forming a mold by cutting a resin having a maximum operating temperature of 250 ° C. or higher and a Rockwell hardness of R20 or higher using the processing program.

  The mold according to the third aspect of the present invention is a mold for casting lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component, on a three-dimensional space of points on the surface of the model. The maximum operating temperature is 250 degrees Celsius or higher cut by using a machining program for cutting generated by using position data indicating the position of the point obtained by measuring the position, and Rockwell It consists of a resin with a hardness of R20 or higher.

  In the first aspect of the present invention, the position of a point on the surface of a casting model is measured in a three-dimensional space, position data indicating the position of the point is obtained, and processing for cutting is performed using the position data. A program is generated, and using a machining program, a resin having a maximum use temperature of 250 degrees or more and a Rockwell hardness of R20 or more is cut to mold a mold, and lead, tin, zinc, or lead, An alloy mainly composed of tin or zinc is cast into the mold.

  In the second aspect of the present invention, the position of a point on the surface of a casting model is measured in a three-dimensional space, position data indicating the position of the point is obtained, and processing for cutting is performed using the position data. A program is generated, and a mold is molded by cutting a resin having a maximum use temperature of 250 ° C. or more and a Rockwell hardness of R20 or more using the machining program.

  In the third aspect of the present invention, a mold made of a resin having a maximum use temperature of 250 ° C. or more and a Rockwell hardness of R20 or more is used to measure the position of the surface point of the model in a three-dimensional space. It is cut and shaped using a machining program for cutting generated by using the position data indicating the position of the point obtained in this way.

  As described above, according to the first aspect of the present invention, a casting can be formed with higher accuracy.

  According to the 2nd side surface of this invention, the casting_mold | template which can shape | mold a casting more accurately is manufactured.

  According to the 3rd side surface of this invention, the casting_mold | template which can shape | mold a casting more accurately is provided.

It is a figure explaining the conventional manufacturing method. It is a block diagram which shows the structure of the manufacturing system of one embodiment of this invention. It is a figure which shows the example of the model 31, the point data 51, the surface data 52, the process program 53, the casting_mold | template 54, and the product 36. FIG. It is a flowchart explaining the manufacturing method of a casting.

  Embodiments of the present invention will be described below. Correspondences between the configuration requirements of the present invention and the embodiments described in the detailed description of the present invention are exemplified as follows. This description is to confirm that the embodiments supporting the present invention are described in the detailed description of the invention. Accordingly, although there are embodiments that are described in the detailed description of the invention but are not described here as embodiments corresponding to the constituent elements of the present invention, It does not mean that the embodiment does not correspond to the configuration requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  The method for producing a casting according to the first aspect of the present invention is a method for producing a casting (for example, product 36) formed from lead, tin, or zinc, or an alloy mainly composed of lead, tin, or zinc. A measurement step (for measuring position of a surface point of the cast model (for example, model 31) in a three-dimensional space and acquiring position data (for example, point data 51) indicating the position of the point ( For example, step S11 in FIG. 4), a generation step (for example, step S12 and step S13 in FIG. 4) for generating a machining program (for example, machining program 53) for cutting using the position data, Using a machining program, a resin (for example, polytetrafluoroethylene) having a maximum operating temperature of 250 ° C. or more and a Rockwell hardness of R20 or more is cut to a mold ( For example, a cutting step (for example, step S14 in FIG. 4) for forming the mold 54) and a casting step in which lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component is cast into the mold ( For example, it includes step S15) of FIG.

  The mold manufacturing method according to the second aspect of the present invention is a manufacturing method for manufacturing a mold (for example, mold 54) into which lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component is cast. Then, the position of a point on the surface of a model (eg, model 31) of a casting (eg, product 36) is measured in a three-dimensional space, and position data (eg, point data 51) indicating the position of the point is obtained. Measurement step (for example, step S11 in FIG. 4) and a generation step (for example, step S12 and step S13 in FIG. 4) using the position data to generate a machining program (for example, machining program 53) for cutting. ) And the above processing program, a resin (for example, polytetrafluoroethylene) having a maximum use temperature of 250 ° C. or more and a Rockwell hardness of R20 or more is cut. Cutting step of forming a mold Te (e.g., step S14 in FIG. 4) and a.

  The mold according to the third aspect of the present invention (for example, the mold 54 in FIG. 3) is a mold for casting lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component. For example, for the cutting generated by using the position data (for example, point data 51) indicating the position of the point obtained by measuring the position of the surface point of the model 31) in the three-dimensional space. It is made of a resin (for example, polytetrafluoroethylene) cut by using a processing program (for example, processing program 53) and having a maximum use temperature of 250 ° C. or more and a Rockwell hardness of R20 or more.

  FIG. 2 is a block diagram showing the configuration of the manufacturing system according to the embodiment of the present invention. The manufacturing system includes a 3D (three-dimensional) scanner 32 that measures the three-dimensional shape of the model 31, a CAD (computer aided design) / CAM (computer aided manufacturing) system 33, an NC (numerical control) cutting machine 34, and a casting machine. It consists of a processing machine 35. A final product 36 that is a casting is formed by the casting machine 35.

  The product 36 may be a casting formed from lead, tin, or zinc, or an alloy mainly composed of lead, tin, or zinc. The product 36 is a pseudo bait used for fishing, a toy, a memorial of achievements and achievements. Such as medals, jewelry, straps, or key holders designed for such purposes. More specifically, for example, the jewelry is a pendant, a ring, an earring, a pierced earring, a cuff, or a tie pin.

  Hereinafter, the configuration of the manufacturing system will be described with reference to FIG. 3 showing the relationship between the shape of the model 31 or the shape of the product 36.

  The model 31 is made of wood, resin, metal, or the like, and has the same shape as the product 36 unlike the conventional one. Preferably, the model 31 is made of the same material as the product 36 and has the same shape. For example, as shown in FIG. 3, when the product 36 is a metal jig that is a kind of lure used for fishing, the model 31 is formed of the same lead as the product 36 or an alloy containing lead as a main component, and is formed on the surface. Including the formed pattern, it is molded into the same outer shape as the product 36.

  Since the model 31 and the product 36 can be made of the same material and have the same shape, the designer can directly make the model 31 or the model 31 can be used for testing. For example, when the product 36 is a metal jig, it can be verified whether or not fishing results can actually be obtained at a fishing spot, and a prototype whose shape is finely adjusted can be used as the model 31.

  The 3D scanner 32 is, for example, an optical three-dimensional scanner, measures the position of the surface point of the model 31 in the three-dimensional space, and acquires point data indicating the position of each point. The surface of the model 31 mentioned here includes not only the outer surface of the model 31 but also the inner surface connected to the outer surface of the model 31. For example, when a cavity open to the outside is formed inside the model 31, the surface of the cavity is also included in the surface of the model 31.

  For example, as shown in FIG. 3, when the product 36 is a metal jig, the 3D scanner 32 measures the position of the surface of the model 31 having the same shape as the product 36 in a three-dimensional space, and the surface of the model 31. Point data 51 indicating the position of each point is acquired. The point data 51 is an example of position data.

  Note that the 3D scanner 32 may be an optical type using a laser, a contact type that measures a position in contact with an object, or another medium such as an ultrasonic wave. The 3D scanner 32 supplies point data 51 indicating the position of the point on the surface of the model 31 to the CAD / CAM system 33. In this case, even if the 3D scanner 32 transmits the point data 51 to the CAD / CAM system 33 via a network or a communication line, a recording medium such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory is used. Alternatively, the point data 51 may be provided. The point data 51 may be a polygon data system.

  The CAD / CAM system 33 includes a computer that executes a CAD / CAM program and the like, and uses the point data 51 supplied from the 3D scanner 32 to generate a machining program for cutting a mold material and forming a mold. The CAD / CAM system 33 includes a CAD system 41 and a CAM system 42. The data conversion unit 43 of the CAD system 41 converts the point data 51 into surface data indicating the surface of the model 31 and indicating the surface in the three-dimensional space. For example, as illustrated in FIG. 3, the data conversion unit 43 converts the point data 51 into surface data 52 that is a surface of the model 31 and indicates a surface in a three-dimensional space. The surface data 52 is an example of surface data.

  More specifically, for example, the CAD system 41 can be configured by a computer that executes Rapid Form XOR / Redesign (trademark), which is a CAD program.

  In the CAD system 41, a mold is designed using the surface data 52. For example, in the CAD system 41, the cavity of each of the pair of molds has a shape obtained by dividing the surface data 52 into the left, right, front, back, or top and bottom according to the operator's instruction. A mold is designed by providing a gate, a runway, a bottom of the gate, a hot water, and the like.

  As described above, in the CAD system 41, a mold is designed and surface data of the mold is created. The mold surface data is supplied from the CAD system 41 to the CAM system 42.

  Note that the data conversion unit 43 may convert the point data 51 into solid data indicating the shape of the model 31 and indicating the shape in the three-dimensional space. In this case, the CAD system 41 creates mold surface data or creates mold solid data.

  When the CAD system 41 uses the surface data 52 to design a mold, the surface data 52 having the same size as the point data 51 (the size of the object represented by the point data 51 and the surface data 52). Is not limited to designing a mold, and the size of the object represented by the surface data 52 can be arbitrarily enlarged or reduced according to an instruction from the operator. You may make it deform | transform a part or all.

  Furthermore, a so-called multi-piece mold may be designed.

  In the CAM system 42, a machining program for cutting is generated from the mold surface data. The machining program includes data defining a path of a tool such as a mill, and controls the NC cutting machine 34. More specifically, for example, the machining program describes the operation of the cutting edge of a cutting tool such as a mill with reference to a three-dimensional coordinate axis.

  For example, as shown in FIG. 3, when the product 36 is a metal jig, the CAM system 42 generates a machining program 53 for forming a cavity that includes a minimum error with respect to the surface data 52.

  The machining program 53 is supplied from the CAD / CAM system 33 to the NC cutting machine 34. In this case, even if the CAD / CAM system 33 transmits the machining program 53 to the NC cutting machine 34 via a network or a communication line, recording such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory is possible. The machining program 53 may be provided via a medium.

  Although the CAD / CAM system 33 has been described as being composed of the CAD system 41 and the CAM system 42, the CAD system 41 and the CAM system 42 are respectively separate systems such as being configured by computers that execute programs. You may make it comprise as.

  The NC cutting machine 34 uses the machining program 53 to cut the resin and mold the mold. That is, the NC cutting machine 34 drives a built-in servo motor according to a machining program 53 that describes the operation of the cutting edge of a cutting tool such as a mill on the basis of a three-dimensional coordinate axis. The workpiece is operated to cut out the mold from the mold material that is a resin. In this case, as the mold material, a resin having a maximum use temperature of 250 ° C. or more and a Rockwell hardness of R20 or more is used. Preferably, fluororesin or polyimide is used as a mold material.

  When a mold is made of a metal such as iron, aluminum, or brass, the thermal conductivity of the mold is high, so if you cast lead, tin, or zinc, or an alloy based on lead, tin, or zinc, The product is cooled and solidified in the middle of the process, and the product cannot be accurately molded. Therefore, it is preferable to mold the mold with a resin which is a material having a sufficiently low thermal conductivity.

  Compared to silicon rubber, the mold is molded by cutting the mold with the same or higher maximum temperature and the hardness is harder, so even if lead or zinc with relatively high density is poured, deformation of the mold As a result, the product 36 that is a casting can be molded with higher accuracy.

The maximum operating temperature and Rockwell hardness of the mold material mentioned here are JIS (Japanese industrial standards), ISO (international organization for standardization), or ASTM (american society).
for testing and materials (American Society for Testing and Materials)). For example, when fluororesin is used as a mold material, the maximum operating temperature is measured by a test specified in JIS K7226 or ISO2578, and Rockwell hardness is measured by a test specified in JIS K7202 or ISO2039. Is done.

  The mold material is not limited to fluororesin such as polytetrafluoroethylene (PTFE (Polytetrafluoroethylene)) or tetrafluoroethylene perfluoroalkyl vinyl ether copolymer (PFA), and polyimide (PI). ), Polyetheretherketone (PEEK), polyamideimide (PAI), and the like.

  By the way, according to the test according to JIS K7226 or ISO2578 and JIS K7202 or ISO2039, the maximum use temperature and Rockwell hardness of polytetrafluoroethylene (PTFE) are 260 degrees Celsius and R20, and tetrafluoroethylene perfluoroalkyl The maximum service temperature and Rockwell hardness of vinyl ether copolymer (PFA) is 260 degrees Celsius and R50. Similarly, the maximum use temperature and Rockwell hardness of polyimide (PI) are 288 degrees Celsius and E45 to E58, and the maximum use temperature and Rockwell hardness of polyetheretherketone (PEEK) are 250 degrees Celsius and R126.

  The melting points of lead, tin, and zinc are 327.5 degrees Celsius, 449.5 degrees Celsius, and 419.5 degrees Celsius, respectively. In contrast, for example, the melting points of polytetrafluoroethylene and polyimide (crystalline thermoplastic polyimide (N-TPI)) are 327 degrees Celsius and 386 degrees Celsius, respectively. If the temperature is equal to or higher than the melting point and is equal to or lower than the decomposition start temperature, polytetrafluoroethylene becomes a gel and does not cause thermal flow, so its shape does not collapse. The same applies to polyimide. Therefore, the product 36 can be accurately molded by casting lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component.

  Further, it is preferable to use a so-called machinable material as the mold material. For example, if the toughness indicated by the Izod impact strength measured by a test specified by JIS, ISO, or ASTM is large, cracks hardly progress and a relatively smooth surface can be obtained by cutting. According to the test by JIS K7110 or ISO180, the Izod impact strength of polytetrafluoroethylene (PTFE) is 150 to 160 J / m. For example, a mold material having an Izod impact strength of 150 J / m or more is preferable.

  For example, as shown in FIG. 3, when the product 36 is a metal jig, a mold having a maximum operating temperature of 250 ° C. or higher and a Rockwell hardness of R20 or higher is cut by using the machining program 53. 54 is molded. Since the mold material itself is sufficiently hard, the mold 54 can be accurately formed with respect to the shape indicated by the processing program 53.

  The casting machine 35 casts lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component into a mold 54, and contains lead, tin, or zinc, or lead, tin, or zinc as a main component. A product 36, which is a casting made of an alloy, is formed.

  The casting machine 35 can employ a gravity casting method, a centrifugal casting method, a low pressure casting method, or the like.

  Next, a product manufacturing method will be described with reference to the flowchart of FIG. In step S <b> 11, the 3D scanner 32 scans the model 31 in three dimensions to obtain point data 51. That is, the 3D scanner 32 measures the position of the surface point of the model 31 in the three-dimensional space, and acquires the point data 51 indicating the position of each point.

  In step S <b> 12, the data conversion unit 43 of the CAD system 41 converts the three-dimensional point data 51 indicating the shape of the model 31 into the surface data 52. That is, the data conversion unit 43 converts the point data 51 into the surface data 52 indicating the surface of the model 31 and indicating the surface in the three-dimensional space.

  In step S <b> 13, the CAD / CAM system 33 generates a processing program 53 for processing the mold 54 from the surface data 52 indicating the shape of the model 31. More specifically, the CAD system 41 uses the surface data 52 to design the mold 54, and the CAM system 42 generates a machining program 53 for cutting from the surface data 52 of the mold 54.

  In other words, in step S12 and step S13, the CAD / CAM system 33 generates a machining program for cutting using position data indicating the position of the point on the surface of the model. When the position data is a surface of the model 31 and converted into surface data indicating a surface in a three-dimensional space, a machining program is generated from the surface data.

  In step S <b> 14, the NC cutting machine 34 uses the machining program 53 to cut the resin mold and mold the mold 54. For example, the NC cutting machine 34 uses the machining program 53 to mold the mold 54 by cutting from a resin having a maximum operating temperature of 250 ° C. or more and a Rockwell hardness of R20 or more. More preferably, the NC cutting machine 34 uses the machining program 53 to cut a mold material made of fluororesin or polyimide and mold the mold 54.

  In step S <b> 15, the casting machine 35 uses the mold 54 to cast a product 36 that is a casting. That is, in the casting machine 35, lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component is cast into the mold 54, and lead, tin, or zinc, or lead, tin, or zinc. A product 36 is manufactured which is a casting formed from an alloy containing as a main component. In step S15, the casting product 36 may be cast manually by using the mold 54 without using the casting machine 35.

  Actually, when a product was manufactured by the manufacturing system of FIG. 2, a product that was a casting having a length error of 0.1% or less with respect to the model could be manufactured. This means that the accuracy of 100 times or more is obtained with respect to the conventional manufacturing method.

  For example, when a designer directly manufactures the model 31, a product 36 that is a casting having the same shape as the model 31 can be manufactured. In addition, a product 36 in which the weight balance and the shape are the same castings as the model 31 can be manufactured from the model 31 that is a prototype of a metal jig from which fishing results are actually obtained at the fishing ground.

  Thus, the position of the surface of the casting model surface is measured in a three-dimensional space, position data indicating the position of the point is obtained, and using the position data, a machining program for cutting is generated, Using a processing program, mold the mold by cutting a resin with a maximum operating temperature of 250 degrees or more and a Rockwell hardness of R20 or more, and lead, tin, or zinc, or lead, tin, or zinc. When an alloy having a main component is cast into a mold, a casting can be formed with higher accuracy. In particular, a three-dimensional casting can be formed with higher accuracy.

  Furthermore, it is not necessary to wait for the time for the gypsum mold 12, the male mold 13 formed of urethane resin, and the mold 14 formed of silicon rubber to solidify, and the casting can be quickly started.

  In addition, the position of the surface of the casting model surface is measured in a three-dimensional space, position data indicating the position of the point is obtained, a processing program for cutting is generated using the position data, and the processing program is When the mold is molded by cutting a resin having a maximum use temperature of 250 ° C. or more and a Rockwell hardness of R20 or more, the mold can be molded with higher accuracy. In particular, a mold capable of forming a three-dimensional casting can be manufactured with higher accuracy.

  Furthermore, a mold having a maximum operating temperature of 250 ° C. or more and a Rockwell hardness of R20 or more was obtained by measuring the position of the point on the surface of the model in the three-dimensional space. In the case where cutting is performed using a cutting program generated by using position data indicating the position, the casting can be formed with higher accuracy. In particular, a three-dimensional casting can be formed with higher accuracy.

  The material of the mold 54 formed by cutting is a material having a thermal conductivity smaller than that of the metal, maintaining the shape even at the melting point of lead, tin, or zinc, A material having good machinability and a smooth finished surface, for example, a non-metallic inorganic material such as ceramic, brick, or plaster, or wood can be used. In this case, the NC cutting machine 34 uses a machining program 53 to cut a non-metallic inorganic material such as ceramic, brick, or gypsum or wood to form a mold, and in the casting machine 35, the lead, tin Or zinc, or lead, tin, or an alloy based on zinc is cast into a mold made of a non-metallic inorganic material or wood, and the main component is lead, tin, or zinc, or lead, tin, or zinc. A product 36 formed from the alloy as a component is produced. Further, in step S14, the NC cutting machine 34 uses a machining program 53 to form a mold by cutting from a non-metallic inorganic material such as ceramic, brick, or gypsum or wood, and in step S15, a casting process is performed. In machine 35, lead, tin, or zinc, or lead, tin, or an alloy based on zinc is cast into a mold made of a non-metallic inorganic material or wood, and lead, tin, zinc, or lead A product 36 is produced which is formed from an alloy based on tin, tin or zinc. In this case, not only lead, tin, or zinc, or an alloy containing lead, tin, or zinc as a main component, but also a product 36 made of silver or a silver-based alloy having a higher melting point is manufactured. be able to.

  That is, the position of the surface of the casting model surface is measured in a three-dimensional space, position data indicating the position of the point is obtained, a processing program for cutting is generated using the position data, and the processing program The mold was formed by cutting a non-metallic inorganic material using lead, and lead, tin, zinc, or silver, or an alloy containing lead, tin, zinc, or silver as a main component was cast into the mold. In this case, the casting can be formed with higher accuracy. In particular, a three-dimensional casting can be formed with higher accuracy. Alternatively, the position of the point on the surface of the casting model is measured in a three-dimensional space, position data indicating the position of the point is obtained, a processing program for cutting is generated using the position data, and the processing program When cutting the wood and molding the mold, lead, tin, zinc, or silver, or an alloy mainly composed of lead, tin, zinc, or silver is cast into the mold, Casting can be formed with higher accuracy. In particular, a three-dimensional casting can be formed with higher accuracy.

  Although it has been described that the surface data 52 indicating the shape of the model 31 is generated from the point data 51 indicating the shape of the model 31 and the machining program 53 is generated from the surface data 52, the present invention is not limited to this. After generating the surface data 52 indicating the shape of the cavity from the point data 51 indicating the shape of the model 31, the machining program 53 may be generated from the surface data 52 indicating the shape of the cavity.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

31 models, 32 3D scanner, 33 CAD / CAM system, 34 NC cutting machine, 35 casting machine, 36 products, 41 CAD system, 42 CAM system, 43 data conversion unit, 51 point data, 52 surface data, 53 Machining program, 54 molds

Claims (5)

In a manufacturing method for manufacturing a casting formed from lead, tin, or zinc, or an alloy mainly composed of lead, tin, or zinc,
A measurement step of measuring a position of a surface point of the casting model on a three-dimensional space, and acquiring position data indicating the position of the point;
A generation step of generating a machining program for cutting using the position data;
A cutting step in which a mold is formed by cutting a resin having a maximum use temperature of 250 ° C. or higher and a Rockwell hardness of R20 or higher using the processing program,
A casting step of casting lead, tin, or zinc or an alloy mainly composed of lead, tin, or zinc into the mold. The manufacturing method according to claim 1, wherein in the generation step, the position data is converted into plane data indicating a plane of the model and indicating a plane in a three-dimensional space, and the machining program is generated from the plane data. The manufacturing method according to claim 1, wherein in the cutting step, the mold is formed by cutting fluororesin or polyimide using the processing program. In a manufacturing method for manufacturing a mold for casting lead, tin, or zinc, or an alloy mainly composed of lead, tin, or zinc,
A measurement step of measuring a position on a three-dimensional space of a point on the surface of the casting model, and obtaining position data indicating the position of the point;
A generation step of generating a machining program for cutting using the position data;
A mold manufacturing method comprising: a cutting step of cutting a resin having a maximum use temperature of 250 ° C. or more and a Rockwell hardness of R20 or more using the processing program. In molds for casting lead, tin, or zinc, or alloys based on lead, tin, or zinc,
Cut by using a machining program for cutting generated by using the position data indicating the position of the point obtained by measuring the position of the surface point of the model in the three-dimensional space,
A mold made of a resin with a maximum operating temperature of 250 ° C or higher and a Rockwell hardness of R20 or higher.

Images