With the rapid development of China's automobile, motorcycle, home appliance and other industries, the shape of industrial products has become more and more complicated while meeting the performance requirements, and the manufacture of these products is inseparable from the mold, which requires the mold manufacturing industry to be the most Produce molds with fast speed, lowest cost and highest quality. In order to meet the above requirements, mold companies can only be invincible in the fierce market competition by using advanced management methods and CAD/CAM integrated manufacturing technology.
In 1992, Guangzhou Cavity Mould Factory began to use Pro/ENGINEER software to design and manufacture die-casting molds, and applied the software to complete the national “Eighth Five-Year†key enterprise technology research project “Development of large-scale complex die-casting molds†and Guangzhou. The research and development projects such as the application research of computer-aided mold design, manufacturing and analysis of key scientific and technological projects, have caused Pro/ENGINEER software twice, and developed the motorcycle engine, gear box and automobile clutch housing. Large-scale complex die-casting molds such as home appliances have completed more than 100 sets of molds in three-dimensional modeling, mold design, and CNC machining programming, and have achieved great economic benefits.
Here are some of our experiences in the design and manufacture of die-casting molds using Pro/ENGINEER software.
Pro/ENGINEER software integrated manufacturing technology mold CAD / CAE / CAM system integration key is to establish a single graphics database, in CAD, CAE, CAM, the automatic transfer and conversion of data between the units, so that the CAM, CAE stage is complete Absorb the three-dimensional graphics in the CAD stage, reduce the time and error of the intermediate modeling; use the computer to repeatedly modify the mold performance, mold structure, machining accuracy, the flow of metal liquid in the mold and the temperature distribution during the working process of the mold. Optimization, the problem is found before the formal production, greatly shortening the mold making time and improving the precision of mold processing.
Pro/ENGINEER software uses object-oriented unified database and parametric modeling technology, with conceptual design, basic design and detailed design functions, providing an excellent platform for integrated manufacturing of molds.
Pro/ENGINEER's parallel engineering technology is applied in the mold. The mold is oriented to the order-type production method, which is a single-sex production, the manufacturing process is complex, and the delivery time is short. If the mold is manufactured by CAD and CAM unit technology, the manufacturing precision is low and the cycle is long. In order to solve the above problems, we introduce parallel engineering technology into the mold manufacturing process.
The so-called parallel engineering is a design engineer considering the molding process of the mold and the factors affecting the life of the mold when designing the three-dimensional parts of the product, and proofreading, checking, and pre-discovering errors in the design process. After the initial establishment of the 3D model of the product, several engineers in the design, manufacturing and auxiliary analysis departments simultaneously carried out mold structure design, engineering detail design, mold performance auxiliary analysis and CNC machine tool machining instruction programming, and each engineer on the product The modifications can be automatically reflected to other engineers, greatly reducing the time for design and CNC programming.
In the actual production process, using Pro/ENGINEER software, we will design the original mold structure → mold cavity, core two-dimensional design → process preparation → mold cavity, core design three-dimensional modeling → CNC machining instruction programming → CNC machining The serial process route is changed to a parallel route of design and process preparation by different engineers at the same time, which not only improves the manufacturing precision of the mold, but also shortens the design and numerical control programming time by more than 40%.
To implement parallel engineering, it is necessary to realize the 3D graphics data sharing of parts, so that the graphic data used by each engineer is absolutely the same, and the modifications made by each engineer are automatically reflected to other relevant engineers to ensure the uniqueness and reliability of the data. Sex. Pro/ENGINEER software has a single database and parameterized entity feature modeling technology to provide reliable technical guarantee for parallel engineering.
Pro/ENGINEER Software Tips to Build Your Own Runtime Environment Pro/ENGINEER software can be used to create a standard Pro/ENGINEER software runtime environment and a very personalized runtime environment in Pro/ENGINEER software to increase usage efficiency. In particular, the use of mapkey is reasonable, and the combination of instructions can be reduced to reduce the time required to select a menu.
To make the part shade, just add mapkey$ F4#VIEW in the config.pro file; #VIEW; #COSMETIC ; #SHADE ; #DISPLAY ; #DONE-RETURN ; press F4 to complete the coloring command. Reduce the time for selecting menus and improve the efficiency of use. From this type of push you can complete a combination of arbitrary instructions.
Note: config.pro in the pro/E/text directory starts the pro/E auto-incoming, and manages the entire running environment. The config.pro in the working directory is only for this directory.
Establishing a standard parts library Use the parameterization function or instruction programming technology of Pro/ENGINEER software to establish a standard parts library commonly used in this unit, reducing repetitive modeling time and improving design efficiency.
Attention Accuracy settings can be solved by increasing the accuracy (giving a smaller Accuracy value) in the mold design.
Some features of Geom Check can also be solved by improving the accuracy when modeling solids. But the higher the accuracy, the longer the Regeneration part will take.
Chamfering Techniques (1) The chamfering should be performed after the drafting is completed. If the chamfering is completed first, the surface associated with the chamfer may not be able to complete the design of the drafting slope.
(2) When some solid chamfering is performed, the chamfered surface can be displayed on the screen, but the chamfering cannot be completed. In this case, selecting Make Surface from the Attachment Type option can generate a chamfered surface and merge the chamfered surfaces. Merge), you can generate the required entities by using the merged surface to cut out the entity.
Note the Geom Check tip, which should eliminate the features of the Geom Check during the modeling phase, otherwise there may be problems during mold design and processing.
Reasonable use of surface and solid hybrid modeling techniques Some shapes can not be completed with a single solid feature, you can use the surface modeling technology to complete the relevant modeling, use the Use Quit command in Protrusion to convert the surface into a solid, or use Use Quit in Cut The instruction cuts out the shape of the surface in the solid.
Mold design (1) Use the Info → Srf Analysis → Draft Check function to check the mold for undercut.
(2) If you want to use the solid surface when creating the parting surface, you should copy → Suef&bnd as much as possible, complete the required surface once, do not copy the surface by copy → Indiv surfs, and then merge the surface into the desired surface.
Unit Conversion Techniques In some cases, when converting a file in inches to a file in millimeters, the conversion cannot be completed when using the Same Size command under the Seu up→Units→Length menu. In this case, you should use Same Dims to complete the conversion. Use the Set up→Shrinkage command to calculate the shrinkage method to enlarge the part by 25.4 times and complete the inch to millimeter conversion.
CNC machining instruction programming of parts (1) Establishing machining tool and machining parameter library Establishing the common tool and machining parameter library of this unit can directly extract relevant tools and processing parameters from the database during NC machining instruction programming, which can greatly shorten the programming time.
(2) When using the Mill Molding command, use the Mill Molding command as much as possible to facilitate the selection of the machining surface and improve the machining efficiency.
(3) Appropriate adjustment of the value of Cut_angle can sometimes eliminate overcutting.
(4) When setting the machining parameters, select the option in Circ_interpolation as Point _ only, and output the machining data in direct mode to convert the arc machining into a linear machining, which can eliminate the error of the NC machining circular arc.
(5) Reasonable use of material removal instructions can provide more convenience and speed for machining simulation.
Method for quickly generating three-dimensional images of electrodes (1) The overall electrode pattern of the cavity and core can be generated very quickly by using the cut out function in the assembly.
(2) The partial electrode pattern can be generated by the function of cut using the integral electrode pattern.
Processing method of spark position (discharge gap) during electrode machining (1) With spherical and chamfering tools, the negative margin can be given directly in the processing allowance (Stock allow).
(2) A chamfer larger than the spark position can be solved by using a Flat Endmill.
The above is some of our experience with Pro/Engineer software. By communicating and discussing the experience, we will be able to expand the benefits of consistent users.
In 1992, Guangzhou Cavity Mould Factory began to use Pro/ENGINEER software to design and manufacture die-casting molds, and applied the software to complete the national “Eighth Five-Year†key enterprise technology research project “Development of large-scale complex die-casting molds†and Guangzhou. The research and development projects such as the application research of computer-aided mold design, manufacturing and analysis of key scientific and technological projects, have caused Pro/ENGINEER software twice, and developed the motorcycle engine, gear box and automobile clutch housing. Large-scale complex die-casting molds such as home appliances have completed more than 100 sets of molds in three-dimensional modeling, mold design, and CNC machining programming, and have achieved great economic benefits.
Here are some of our experiences in the design and manufacture of die-casting molds using Pro/ENGINEER software.
Pro/ENGINEER software integrated manufacturing technology mold CAD / CAE / CAM system integration key is to establish a single graphics database, in CAD, CAE, CAM, the automatic transfer and conversion of data between the units, so that the CAM, CAE stage is complete Absorb the three-dimensional graphics in the CAD stage, reduce the time and error of the intermediate modeling; use the computer to repeatedly modify the mold performance, mold structure, machining accuracy, the flow of metal liquid in the mold and the temperature distribution during the working process of the mold. Optimization, the problem is found before the formal production, greatly shortening the mold making time and improving the precision of mold processing.
Pro/ENGINEER software uses object-oriented unified database and parametric modeling technology, with conceptual design, basic design and detailed design functions, providing an excellent platform for integrated manufacturing of molds.
Pro/ENGINEER's parallel engineering technology is applied in the mold. The mold is oriented to the order-type production method, which is a single-sex production, the manufacturing process is complex, and the delivery time is short. If the mold is manufactured by CAD and CAM unit technology, the manufacturing precision is low and the cycle is long. In order to solve the above problems, we introduce parallel engineering technology into the mold manufacturing process.
The so-called parallel engineering is a design engineer considering the molding process of the mold and the factors affecting the life of the mold when designing the three-dimensional parts of the product, and proofreading, checking, and pre-discovering errors in the design process. After the initial establishment of the 3D model of the product, several engineers in the design, manufacturing and auxiliary analysis departments simultaneously carried out mold structure design, engineering detail design, mold performance auxiliary analysis and CNC machine tool machining instruction programming, and each engineer on the product The modifications can be automatically reflected to other engineers, greatly reducing the time for design and CNC programming.
In the actual production process, using Pro/ENGINEER software, we will design the original mold structure → mold cavity, core two-dimensional design → process preparation → mold cavity, core design three-dimensional modeling → CNC machining instruction programming → CNC machining The serial process route is changed to a parallel route of design and process preparation by different engineers at the same time, which not only improves the manufacturing precision of the mold, but also shortens the design and numerical control programming time by more than 40%.
To implement parallel engineering, it is necessary to realize the 3D graphics data sharing of parts, so that the graphic data used by each engineer is absolutely the same, and the modifications made by each engineer are automatically reflected to other relevant engineers to ensure the uniqueness and reliability of the data. Sex. Pro/ENGINEER software has a single database and parameterized entity feature modeling technology to provide reliable technical guarantee for parallel engineering.
Pro/ENGINEER Software Tips to Build Your Own Runtime Environment Pro/ENGINEER software can be used to create a standard Pro/ENGINEER software runtime environment and a very personalized runtime environment in Pro/ENGINEER software to increase usage efficiency. In particular, the use of mapkey is reasonable, and the combination of instructions can be reduced to reduce the time required to select a menu.
To make the part shade, just add mapkey$ F4#VIEW in the config.pro file; #VIEW; #COSMETIC ; #SHADE ; #DISPLAY ; #DONE-RETURN ; press F4 to complete the coloring command. Reduce the time for selecting menus and improve the efficiency of use. From this type of push you can complete a combination of arbitrary instructions.
Note: config.pro in the pro/E/text directory starts the pro/E auto-incoming, and manages the entire running environment. The config.pro in the working directory is only for this directory.
Establishing a standard parts library Use the parameterization function or instruction programming technology of Pro/ENGINEER software to establish a standard parts library commonly used in this unit, reducing repetitive modeling time and improving design efficiency.
Attention Accuracy settings can be solved by increasing the accuracy (giving a smaller Accuracy value) in the mold design.
Some features of Geom Check can also be solved by improving the accuracy when modeling solids. But the higher the accuracy, the longer the Regeneration part will take.
Chamfering Techniques (1) The chamfering should be performed after the drafting is completed. If the chamfering is completed first, the surface associated with the chamfer may not be able to complete the design of the drafting slope.
(2) When some solid chamfering is performed, the chamfered surface can be displayed on the screen, but the chamfering cannot be completed. In this case, selecting Make Surface from the Attachment Type option can generate a chamfered surface and merge the chamfered surfaces. Merge), you can generate the required entities by using the merged surface to cut out the entity.
Note the Geom Check tip, which should eliminate the features of the Geom Check during the modeling phase, otherwise there may be problems during mold design and processing.
Reasonable use of surface and solid hybrid modeling techniques Some shapes can not be completed with a single solid feature, you can use the surface modeling technology to complete the relevant modeling, use the Use Quit command in Protrusion to convert the surface into a solid, or use Use Quit in Cut The instruction cuts out the shape of the surface in the solid.
Mold design (1) Use the Info → Srf Analysis → Draft Check function to check the mold for undercut.
(2) If you want to use the solid surface when creating the parting surface, you should copy → Suef&bnd as much as possible, complete the required surface once, do not copy the surface by copy → Indiv surfs, and then merge the surface into the desired surface.
Unit Conversion Techniques In some cases, when converting a file in inches to a file in millimeters, the conversion cannot be completed when using the Same Size command under the Seu up→Units→Length menu. In this case, you should use Same Dims to complete the conversion. Use the Set up→Shrinkage command to calculate the shrinkage method to enlarge the part by 25.4 times and complete the inch to millimeter conversion.
CNC machining instruction programming of parts (1) Establishing machining tool and machining parameter library Establishing the common tool and machining parameter library of this unit can directly extract relevant tools and processing parameters from the database during NC machining instruction programming, which can greatly shorten the programming time.
(2) When using the Mill Molding command, use the Mill Molding command as much as possible to facilitate the selection of the machining surface and improve the machining efficiency.
(3) Appropriate adjustment of the value of Cut_angle can sometimes eliminate overcutting.
(4) When setting the machining parameters, select the option in Circ_interpolation as Point _ only, and output the machining data in direct mode to convert the arc machining into a linear machining, which can eliminate the error of the NC machining circular arc.
(5) Reasonable use of material removal instructions can provide more convenience and speed for machining simulation.
Method for quickly generating three-dimensional images of electrodes (1) The overall electrode pattern of the cavity and core can be generated very quickly by using the cut out function in the assembly.
(2) The partial electrode pattern can be generated by the function of cut using the integral electrode pattern.
Processing method of spark position (discharge gap) during electrode machining (1) With spherical and chamfering tools, the negative margin can be given directly in the processing allowance (Stock allow).
(2) A chamfer larger than the spark position can be solved by using a Flat Endmill.
The above is some of our experience with Pro/Engineer software. By communicating and discussing the experience, we will be able to expand the benefits of consistent users.
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