Method for processing cup-shaped thin-walled member by using cold extrusion process
A technology of process processing and cold extrusion, applied in the field of processing, can solve the problems of material waste, many machining processes, and low production efficiency
Inactive Publication Date: 2015-06-17
GUIZHOU UNIV
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Problems solved by technology
However, there are many processes in mechanical processing, low production efficiency, and serious waste of materials.
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Embodiment Construction
[0036] Embodiment of the present invention: the method of processing cup-shaped thin-walled parts by cold extrusion process, the product produced is a steel thin-walled piston, according to the shear yield strength of the material, the wall thickness coefficient of the product, the friction factor, the contact stress, The slip line field of the cold extrusion process is made by using the shape profile and the mold profile, and the slip line field is as follows figure 2 shown; and then derive the mathematical model of the relationship between the shear yield strength of the material, the wall thickness coefficient of the product, the friction factor and the contact stress according to the slip line field (1)
[0037] σ n = { πμ + ( 3 μ + 1 ) ...
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The invention discloses a method for processing a cup-shaped thin-walled member by using a cold extrusion process. The method comprises: making a slip line field of a cold extrusion process according to a material shear yield strength, a product wall thickness coefficient, a friction factor, contact stress, an outline contour and a mold contour, deducing a relationship mathematics model (1) according to the made slip line field, calculating the wall thickness coefficient f according to the relationship mathematics model (1), adopting the cold extrusion process to process a cup-shaped thin-walled member, and finally adopting machining to treat the generated wall thickness coefficient f to obtain the finished product. According to the present invention, the relationship mathematics model is utilized to calculate the most reasonable wall thickness increment so as to reduce the amount of machining after the cold extrusion process; and compared with application of the traditional processing manner to produce the steel cup-shaped thin-walled member, application of the method of the present invention to produce the steel cup-shaped thin-walled member has the following characteristics that: the raw material can be saved by more than 40%, production efficiency can be increased by five times, production efficiency and product qualification rate in the actual production can be significantly increased, and mechanical properties of parts can be substantially improved.
Description
technical field [0001] The invention relates to a processing method, in particular to a method for processing a cup-shaped thin-walled part by adopting a cold extrusion process. Background technique [0002] At present, many thin-walled parts are processed by cold extrusion forming process. In the current cold extrusion forming process, in order to reduce the deformation resistance of thin-walled parts, it is generally necessary to increase the wall thickness first, and then reduce the excess material The method of cutting. However, in this way, since the reasonable wall thickness increment (that is, the wall thickness coefficient) cannot be known in advance, the designed wall thickness coefficient must be greater than the actual required wall thickness coefficient, and this method will lead to waste of raw materials and increase Subsequent machining steps not only increase costs, but also affect production efficiency. Therefore, due to the characteristics of metal solid f...
Claims
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IPC IPC(8): B21C23/00
Inventor 尹存宏郑伟刚沈明明
Owner GUIZHOU UNIV