Integral hole flanging formation method and tool for conical sheet metal part
A technology for sheet metal parts and drilling holes, applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of low dimensional accuracy and low position accuracy, and achieve the effect of flexible operation and poor product quality.
Inactive Publication Date: 2013-10-23
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology
[0003] The present invention particularly provides an integral hole-turning tool for a conical sheet metal part and its forming method, which can solve the problems of low position accuracy and low dimensional accuracy of the hole turned on the conical surface of the ring-shaped part along the circumferential direction, and ensure that the rear edge of the hole is turned The phenomenon of barbs appearing in the mold opening parts in the axial direction; the overall hole turning forming method of the tapered sheet metal part according to the present invention can realize all the hole turning actions at one time, and ensure the positional accuracy and dimensional accuracy of the holes
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[0018] The steps of the method for integrally turning the holes of the conical sheet metal part of the present invention are:
[0019] (1) Firstly, 18 bottom holes are cut by laser at the pre-piercing position on the tapered surface of the part;
[0020] (2), using a special mold to realize mold closing and turning over holes; the special mold includes a patrix part and a lower die part, the patrix part is arranged on the upper platform of the hydraulic press, and the lower die part is arranged on the lower platform of the hydraulic press, wherein the patrix part A mold base (2), n punches (3) are provided, the punch (3) is placed on the lower surface of the mold base (2), and the lower mold part is provided with a fixed die (11), n sliding dies (12 ), the sliding die (12) is distributed along the inner ring of the fixed die (11); first the parts processed in step (1) are placed on the profile surface of the fixed die (11) to achieve initial positioning, and then the sliding...
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The invention relates to an integral hole flanging formation method for a conical sheet metal part, which comprises the following steps: (1) cutting a bottom hole in a pre-hole-flanging position on the conical surface of the part by a laser; and (2) implementing mold matching and hole flanging by using a special mold: putting the part obtained in the step (1) in a molding surface of a fixed female mold (11) to implement primary positioning, pushing a sliding female mold (12) to a proper position, compacting the part with a mold carrier (2), and finally, pushing a male mold (3) to move in the axial direction of the bottom hole to implement mold matching and hole flanging. The invention particularly provides an integral hole flanging tool for a conical sheet metal part and a formation method thereof. The tool can solve the problems of low position precision and low dimensional precision of the circumferentially flanged hole in the conical surface of the annular part, and ensure the barb phenomenon of the part which is subjected to mold unloading in the axial direction after hole flanging. The integral hole flanging formation method for a conical sheet metal part can implement the whole hole flanging motion at one time, and ensure the position precision and dimensional precision of the hole.
Description
technical field [0001] The invention relates to the field of cold stamping forming technology and forming die structure design, and in particular provides an integral hole-turning tool for a tapered sheet metal part and a forming method thereof. Background technique [0002] For many years, the processes of punching and turning holes in the circumferential direction on the circular thin-walled sheet metal parts of the cone shape are to drill the bottom holes along the circumference of the part, and then distribute the punching holes on the cantilever punching machine according to the positioning of the bottom holes, and finally punch them one by one. For various reasons, it is difficult to adopt a one-step process for turning over holes. For parts with high product technical requirements, especially the traditional process methods that require high positional accuracy and dimensional accuracy are not easy to guarantee, and the quality is unstable, the interchangeability is p...
Claims
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IPC IPC(8): B21D19/00B21D37/10
Inventor 周华锋姚红梅曾庆国彭会文杨海成
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION