Cylindrical thin-walled workpiece machining and forming tool and method
A technology of thin-walled parts processing and forming methods, which is applied in metal processing equipment, metal processing machine parts, positioning devices, etc., can solve the problems of increasing processing allowance, high processing difficulty, waste of materials, etc., and achieves reduction of processing difficulty, welding Small amount of deformation, the effect of eliminating the amount of deformation
Inactive Publication Date: 2021-02-09
SHAANXI HEYE SPECIAL STEEL TOOL
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Problems solved by technology
However, it is a waste of material, which increases the machining allowance, and with the removal of the boss in the subsequent process, the cylinder may be irreparably deformed due to the decrease in rigidity
Moreover, for long-length cylindrical thin-walled parts, it is very difficult to process them according to the traditional process, so there is an urgent need for a processing method that can ensure the machining accuracy of long-length cylindrical thin-walled parts
Method used
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Embodiment
[0086] In the present embodiment, take the manufacture of TC4 titanium alloy cylinder as an example to illustrate the specific implementation of the method. The overall length of the cylinder is 617-637mm, and the wall thickness is 1.2-2.3mm. It is difficult to adopt traditional methods. Processing:
[0087] The main chemical composition of TC4 titanium alloy is:
[0088]
[0089] Step 1: Blank Forging
[0090] The forging is produced according to the maximum outline size of the cylinder. According to the shape of the blank and the forging method, the forging of the cylinder blank includes: sawing, heating, upsetting, punching, mandrel elongation, and hole expansion.
[0091] The sawing step is: sawing the alloy bar according to preset specifications.
[0092] The heating step is: heating the sawn alloy bar to 40°C±10°C below the phase transition point, and the shortest holding time=0.8min / mm×alloy bar diameter;
[0093] The upsetting step is: using an air hammer to upse...
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Abstract
The invention discloses a cylindrical thin-walled workpiece machining and forming tool and method. The method comprises the steps of dividing a to-be-machined cylindrical thin-walled workpiece into aplurality of circular ring structures, accordingly machining each circular ring structure, assembling all machined circular ring structures together, carrying out vacuum electron beam welding so as toobtain a combined component, carrying out vacuum annealing and finish machining on the combined component to obtain the final cylindrical thin-wall workpiece. The machining tool comprises an inner-surface machining tool body, an outer-surface machining tool body and an assembling and welding tool body, the inner-surface machining tool body is used for clamping a circular ring structure when the inner surface of the circular ring structure is machined, the outer-surface machining tool body is used for clamping the circular ring structure when the outer surface of the circular ring structure ismachined, and the assembling and welding tool is used for assembling all the cylinders together when all the circular ring structures are welded into the combined component. According to the tool andmethod, the deformation of the cylindrical thin-walled workpiece in the machining process can be improved and controlled, and the machining precision is guaranteed.
Description
technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a tooling and method for processing and forming cylindrical thin-walled parts. Background technique [0002] Cylindrical titanium alloy thin-walled parts occupy a pivotal position in aerospace and other fields due to the advantages of small net weight, material saving, and compact structure. Machining is a main forming method for cylindrical structural parts, and generally directly adopts Thick-walled pipes are processed and manufactured as blanks. [0003] Due to the relatively large height and diameter of some cylinders, the wall structure is relatively complex, and there are a large number of bosses and windows distributed, and the structure is unevenly distributed, so it is difficult to directly process and shape. In order to obtain cylindrical thin-walled parts with better streamline performance, the current forming process is: forging into ring pa...
Claims
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IPC IPC(8): B23Q3/12B23Q3/06B23K15/00B23K15/04B23K15/06B23P15/00
CPCB23Q3/12B23Q3/065B23P15/00B23K15/0006B23K15/04B23K15/06
Inventor 王世超廉颖蒋立宋冬行吴佳
Owner SHAANXI HEYE SPECIAL STEEL TOOL
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