Tapered sheet metal component drawing method
A conical, sheet metal technology, applied in the field of material processing engineering plastic forming, can solve the problems of unqualified, bulging, double transfer trace parts profile, etc. , The operation method is simple and reliable
Inactive Publication Date: 2014-12-10
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology
[0003] The purpose of the present invention is to provide a method for deep-drawing a sheet metal conical part, which completely solves the problem of local "bulges" and "bulges" at the transition R that have always existed in the traditional method of deep-drawing precision sheet metal conical parts. Unqualified part surface caused by defects such as "double transfer marks"
Method used
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Embodiment 1
[0017] The material of the part to be formed is GH3044, and the thickness of the material is 1.0mm. The structure and parameter requirements of the part are as follows figure 1 As shown, a drawing die with a blank holder device is made by conventional means according to the size standard of the part for deep drawing. The whole drawing process is divided into two steps: first, "conical" deep drawing, and the part at A For the flanging forming part, the material is fed from the inner hole; then, the "straight wall" is drawn, and the drawn forming part at B in the part is fed from the outer edge; where the overall drawing height of the part is H, The drawing height at B is h (see figure 2 ), the specific deep drawing process, such as image 3 As shown: First, a concentric circle of wool is developed according to the principle of equal area, and the unfolded wool is placed on the blank holder 3 of the drawing die, and then the movable limit block 5 is placed on the bottom of the...
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Abstract
A tapered sheet metal component drawing method comprises the steps that a tapered sheet metal component is unfolded, and then is formed through drawing by means of a hydraulic press. The tapered sheet metal component drawing method is characterized in that the drawing formation method particularly comprises two steps, namely tapered drawing and straight wall drawing. For the tapered drawing, at first, a movable limit block is put at the bottom of an edge pressing ring, and then an upper template and a female mold move downwards at the same time, when the protruding part of the female mold is in contact with the upper surface of drawing material, the edge pressing force applied ranges from 250 tons to 300 tons. For the straight wall drawing: the movable limit block is withdrawn from the bottom of the edge pressing ring, and then the upper template and the female mold move downwards till the overall female mold is in contact with the upper surface of drawing material, and the drawing is stopped. The method solves the problems of switchover part slippage, local bump, double switchover traces and the like in the conventional drawing formed tapered component, the precision of the drawing formed moulding surface of the component is high, the operation method is simple and reasonable, and the forming qualification rate reaches 100%.
Description
technical field [0001] The invention relates to the field of material processing engineering plastic forming, and in particular provides a deep drawing method for a sheet metal conical part. Background technique [0002] Precision conical sheet metal parts require high drawing precision, and the design technical conditions allow that after drawing, the local material thickness reduction is 10% of the original material thickness. At present, the process of drawing such conical sheet metal parts in factories is to use a set of drawing dies for one-step drawing on an ordinary hydraulic press. However, due to the inability to accurately control the deformation of the parts, there have always been defects such as irregular slippage at the transfer point when the part is deep-drawn, and defects such as "bulges" and "double transfer marks" appear locally at the transfer R. , resulting in unqualified parts. Contents of the invention [0003] The purpose of the present invention ...
Claims
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IPC IPC(8): B21D22/20
Inventor 杨踊王倩菡刘慧茹石晓东冷连东
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION