A machining method of a boring machine for inclined flange holes in the back of a high-pressure outer cylinder of a steam turbine
A technology of high-pressure outer cylinder and processing method, which is applied in the field of machining field of oblique flange hole boring machine on the back of high-pressure outer cylinder of steam turbine. It can solve the problems of large axial size of workpiece, inconsistent processing standards, and processing errors, so as to ensure processing quality and work efficiency. High, easy-to-operate effect
Active Publication Date: 2016-12-07
HARBIN TURBINE +1
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Problems solved by technology
[0003] The present invention solves the problem that the oblique flange hole on the back of the high-pressure outer cylinder of the steam turbine in the prior art is processed due to the large axial size of the workpiece, and the flange on the other side cannot be processed at one station, so it needs to be turned 180° and re-aligned. clamp, which not only wastes time, but also has the problem of inconsistency between the two processing benchmarks before and after, resulting in errors in processing, and then provides a method for processing the oblique flange hole on the back of the high-pressure outer cylinder of the steam turbine.
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specific Embodiment approach 1
[0013] Specific implementation mode one: combine Figure 1-Figure 4 Describe this embodiment, a kind of steam turbine high-pressure outer cylinder back oblique flange hole boring machine processing method described in this embodiment, the method is realized according to the following steps:
[0014] Step 1: Fix the upper part 1 of the high-pressure outer cylinder to be processed on the CNC boring machine. A number of pads 2 are fixed between the rotating worktables of the CNC boring machine. The axis of the upper half of the high-pressure outer cylinder 1 is parallel to the center line of the upper end surface of the worktable of the CNC boring machine along the length direction. The bottom of the upper half of the high-pressure outer cylinder 1 Each of the four corners of the end is provided with a spacer 2;
[0015] Step 2: The two first inclined flange holes 4 are arranged symmetrically with respect to the vertical plane where the axis 1 of the upper half of the high-press...
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The invention relates to a boring mill machining method for inclined flange holes in the back of a high-pressure outer cylinder of a steam turbine in order to solve the problems that in the prior art, when the inclined flange holes in the back of the high-pressure outer cylinder of the steam turbine are machined, because the axial size of a workpiece is large, a flange on the other side cannot be machined in the station of a flange on one side, the flange on the other side needs to be turned by 180 degrees and needs to be aligned again to be clamped, time is wasted, the machining references of the two flanges are not consistent, and machining errors are caused. The upper half portion of the high-pressure outer cylinder to be machined is fixedly placed on a numerical control boring mill, the halving face of the upper half portion of the high-pressure outer cylinder is fixed to one end of a workbench of the numerical control boring mill, a plurality of cushion blocks are fixedly arranged between the upper half portion of the high-pressure outer cylinder and the rotary workbench of the numerical control boring mill, and the four corners at the bottom end of the upper half portion of the high-pressure outer cylinder are each provided with one cushion block. The method is used for machining the high-pressure outer cylinder of the steam turbine.
Description
technical field [0001] The invention relates to a boring machine processing method for oblique flange holes on the back of a high-pressure outer cylinder of a steam turbine Background technique [0002] Because the large gantry milling machine PMC6500AG-M2 does not have a CNC universal milling head and the large bridge milling machine 20-10FP500NC in the 1990s is equipped with a universal milling head but it is not digitally controlled, and the angle is adjusted by a dial. The oblique flange hole on the back of the cylinder is compensated for the accessory parameters in the gantry milling machine without universal energy angle milling head, because the FAF260 boring machine has a universal milling head, and more importantly, the processing cost per unit time of the FAF260 boring machine is lower than that of the gantry milling machine , the first choice needs to be processed on a boring and milling machine. When processing on a boring machine, the right-angle milling head w...
Claims
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IPC IPC(8): B23B35/00
CPCB23B35/00
Inventor 高岩阎文松冯帆刘滨刚常海滨梁小丹
Owner HARBIN TURBINE