1 Introduction <br> <br> order to standardize the process of the preparation process, and the technical staff freed from the tedious work out simple, free up more time for process improvement and other research work, we have developed a forging process specification computer Auxiliary design of the CAPP system. Through this system, not only the preparation of the forging process can be made more scientific and normative, but also the preparation cycle of the process technology is shortened.
2 System functions (1) The CAPP system can assist in the design of 125MN, 60MN, 12.SMN hydraulic presses and shafts on 7.5kN, 4kN, 1.5kN free forging hammers (including optical axes, multi-step shafts, etc.), rings, and cylinders. Forging process of six types of forgings such as class, block, board, cake and mushroom.
(2) After inputting the part size, determine the shape of the forging according to the forging condition and the material saving principle.
(3) Automatically determine the forging equipment according to the size and weight of the part.
(4) Automatically design machining standard chucks, and automatically design performance, metallographic, low-power and other test bars according to the test bar category. For data with special chucks and special test bars, it can be added and loaded by the process input.
(5) When there are concave files or bosses in the forgings of shafts, cylinders, cakes and blocks, the steps are optimized according to the principle of material saving; the missing trays are automatically optimized for the forgings with round cakes, and the beginning and the category of forgings are determined. .
(6) Automatically select tools such as punches, mandrels, and horses.
(7) The size of the tire mold is required according to the size of the shoulder flange forging.
(8) Automatically determine the roughing allowance (including heat treatment retention and weld retention), forging allowance and tolerance according to the size and shape of the part.
(9) After the forging shape is determined, the forging drawing can be displayed on the screen.
(10) According to the specifications of the steel ingots used in the factory, the data of the number of forgings per piece, the residual material, the material utilization rate and the forging ratio are calculated, which are displayed on the screen for the craftsman to choose.
(11) Automatically determine the number of fires and processes, draw a map of the deformation process, or give a description of the fire in turn.
(12) The forging temperature range, heating specification, post-forging cooling specification and post-forging heat treatment specification are automatically determined according to the material, the blank specification and the forging size.
(13) Display forging data and print forging process cards. The forging image is drawn on the printed forged craft card using a printer.
(14) The data card can be displayed, modified or printed for the input raw data for reference. The original data can be randomly stored and queried according to the figure number and file number.
3 Program features (1) The system adopts modular structure, which is divided into six modules: split shaft, ring, cylinder, cake, block and board. Each module is independent of each other. The program is divided into three parts according to its function: the first part is the pre-processing program, input raw data and data preparation; the second part is the design analysis part; the third part is the post-processing, the result output.
Pre-processing program: input interactive data by means of interactive human-machine dialogue. Each input of a piece of data, the screen has Chinese characters prompt. For some characteristic data, a large number of point menus are used to make the data input operation extremely simple. Considering the inspection and modification of the data after the input, the data input amount is compressed to a minimum.
The design analysis section is the main body of the program and contains all the contents of the forging hammer and hydraulic press forging design.
Post-processing: Print out the form, fill in the corresponding data in the design and fill out the forging map.
The program adopts man-machine dialogue, which is relatively intuitive, small in input, high in automation, easy to operate and easy to promote.
2 System functions (1) The CAPP system can assist in the design of 125MN, 60MN, 12.SMN hydraulic presses and shafts on 7.5kN, 4kN, 1.5kN free forging hammers (including optical axes, multi-step shafts, etc.), rings, and cylinders. Forging process of six types of forgings such as class, block, board, cake and mushroom.
(2) After inputting the part size, determine the shape of the forging according to the forging condition and the material saving principle.
(3) Automatically determine the forging equipment according to the size and weight of the part.
(4) Automatically design machining standard chucks, and automatically design performance, metallographic, low-power and other test bars according to the test bar category. For data with special chucks and special test bars, it can be added and loaded by the process input.
(5) When there are concave files or bosses in the forgings of shafts, cylinders, cakes and blocks, the steps are optimized according to the principle of material saving; the missing trays are automatically optimized for the forgings with round cakes, and the beginning and the category of forgings are determined. .
(6) Automatically select tools such as punches, mandrels, and horses.
(7) The size of the tire mold is required according to the size of the shoulder flange forging.
(8) Automatically determine the roughing allowance (including heat treatment retention and weld retention), forging allowance and tolerance according to the size and shape of the part.
(9) After the forging shape is determined, the forging drawing can be displayed on the screen.
(10) According to the specifications of the steel ingots used in the factory, the data of the number of forgings per piece, the residual material, the material utilization rate and the forging ratio are calculated, which are displayed on the screen for the craftsman to choose.
(11) Automatically determine the number of fires and processes, draw a map of the deformation process, or give a description of the fire in turn.
(12) The forging temperature range, heating specification, post-forging cooling specification and post-forging heat treatment specification are automatically determined according to the material, the blank specification and the forging size.
(13) Display forging data and print forging process cards. The forging image is drawn on the printed forged craft card using a printer.
(14) The data card can be displayed, modified or printed for the input raw data for reference. The original data can be randomly stored and queried according to the figure number and file number.
3 Program features (1) The system adopts modular structure, which is divided into six modules: split shaft, ring, cylinder, cake, block and board. Each module is independent of each other. The program is divided into three parts according to its function: the first part is the pre-processing program, input raw data and data preparation; the second part is the design analysis part; the third part is the post-processing, the result output.
Pre-processing program: input interactive data by means of interactive human-machine dialogue. Each input of a piece of data, the screen has Chinese characters prompt. For some characteristic data, a large number of point menus are used to make the data input operation extremely simple. Considering the inspection and modification of the data after the input, the data input amount is compressed to a minimum.
The design analysis section is the main body of the program and contains all the contents of the forging hammer and hydraulic press forging design.
Post-processing: Print out the form, fill in the corresponding data in the design and fill out the forging map.
The program adopts man-machine dialogue, which is relatively intuitive, small in input, high in automation, easy to operate and easy to promote.
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