Forming method of non-straight cavity inner wall cup tube by cold extrusion, spinning and composite precision forging
A wall cup and non-straight technology, which is applied in the field of non-straight cavity inner wall cup cylinder cold extrusion spinning composite precision forging forming, can solve the problems of not conforming to the development trend of energy saving and green manufacturing, insufficient material utilization, high cost and energy consumption, etc. , to achieve the effect of outstanding technological innovation, low manufacturing cost and high production efficiency
Inactive Publication Date: 2015-08-05
ZHEJIANG WATER CONSERVANCY & HYDROPOWER COLLEGE +1
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Problems solved by technology
The products produced by this process not only decline in overall performance, but the material utilization rate is less than 70%, the cost and energy consumption are high, and the efficiency is low, which does not meet the development trend of energy saving and green manufacturing.
Method used
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Embodiment 1
[0019] The non-straight cavity inner wall cup cylinder cold extrusion spinning compound precision forging forming method described in this example uses the following process route: blank blanking → annealing → phosphating + saponification → extrusion blank → forming spinning → machining → parts ;in:
[0020] a) if figure 2 As shown, the volume of blank 1 is the sum of the volume of the part and the machining allowance during blanking, and the diameter of blank 1 is the same as the outer diameter of the part;
[0021] b) if image 3 A machining allowance of 1-1.5mm is left on the outer wall of the blank 2 made by extrusion, and the mouth of the blank 2 is provided with an outer flange 3, and the volume of the outer flange 3 is the same as that of the mouth 4 of the final part. equal volume;
[0022] c) if Figure 4 , Figure 5 As shown, the inner mold 7 composed of the core rod 5 and the punch insert 6 is put into the inner cavity of the blank 2 and tightly fitted with th...
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The invention relates to a cold-extruding and spinning composite precision forging method for a non-straight cavity inner wall cup tube. The method is characterized by comprising the following process routes: blanking, annealing, phosphating and saponifying, extruding to form blanks, forming and spinning, machining and obtaining a part, wherein during forming and spinning, an internal mold consisting of a core rod and a male mold insert is placed in the inner chamber of the blank and is in tight fit with the blank, a main shaft drives the core rod to enable the blank to rotate, a spinning roller mounted on a movable tool holder (is operated to move in the radial direction of a workpiece to be in contact with the blank, and finally, an excircle bus of the spinning roller and an excircle bus of the blank are in full contact to complete extrusion.
Description
technical field [0001] The invention relates to a compound precision forging forming method, in particular to a non-straight cavity inner wall cup tube cold extrusion spinning composite precision forging forming method. Background technique [0002] Non-straight cavity inner wall cup tube parts are widely used in electromechanical, automobile and other industries, especially the parts whose inner diameter of the mouth is smaller than the diameter of the cylindrical inner wall. Due to the limitation of objective technical conditions, the forming method and performance need to be improved. . Such as figure 1 Shown is a typical part found in brakes in the automotive industry. The inner diameter of the piston mouth smaller than the inner diameter of the lower part of the mouth and the inner diameter of the cylinder wall At the position of 11.1±0.25 downwards from the mouth, the outer wall is an inwardly concave annular groove, and the corresponding inner wall is an inwar...
Claims
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IPC IPC(8): B21D22/16B23P15/00
Inventor 丁明明夏巨谌金俊松黄勇
Owner ZHEJIANG WATER CONSERVANCY & HYDROPOWER COLLEGE