Split type lower ring machining method
A processing method and a split-type technology, applied in the field of hydraulic turbine parts manufacturing, can solve the problems of the split-type lower ring being difficult to ensure product quality, and achieve the effects of convenient transportation and high dimensional accuracy
Active Publication Date: 2021-06-11
一重集团(黑龙江)重工有限公司 +1
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Problems solved by technology
[0003]
The present invention aims to solve the problem that the existing split-type lower ring processing method is difficult to guarantee product quality to a certain extent
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[0037] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and thus should not be construed as limiting the invention.
[0039] Moreover, the Z axis in the accompanying drawings represents the vertical direction, that is, the up and down position, and the positiv...
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The invention provides a split type lower ring machining method, and relates to the technical field of water turbine part manufacturing. The split type lower ring machining method comprises the steps that multiple arc sections are cast, and the multiple arc sections are suitable for being installed and welded into a lower ring; a horizontal datum line is drawn on the outer wall of the lower straight circle of each arc section, and single-section junction face lines are drawn on the inner side and the outer side of the junction face of each arc section correspondingly; rough milling is conducted on the upper end face, the lower end face and the junction faces on the two sides of each arc section till the arc sections are flat; finish milling is conducted on the junction faces on the two sides of each arc section till the length of the arc section in the arc length direction reaches the set length, and the included angle of the junction faces on the two sides of each arc section obtained after finish milling reaches the set angle; the multiple arc sections are installed and welded together in a pairwise resistance welding manner to form a lower ring blank; the inner hole wall and the outer circle wall of the lower ring blank are subjected to finish milling to form the lower ring; and the lower ring is split into multiple sections of single-section rings. High-quality products can be machined.
Description
technical field [0001] The invention relates to the technical field of hydraulic turbine component manufacturing, in particular to a split-type lower ring processing method. Background technique [0002] With the development of high-efficiency and large-scale hydraulic turbines, some large and medium-sized hydropower stations have been developed and constructed in my country. The lower ring is an important component of the turbine runner. Due to the large diameter and thin wall of the lower ring, the lower ring is usually divided into multiple lobes and cast separately, and then the multi-lobed arc lobes are welded into one. way produced. After the product is processed, it is not only required to ensure that the overall size of the product meets the requirements of the drawing, but also to ensure that the size of each split arc lobe is consistent, but the existing split processing method is difficult to guarantee the quality of the product. Contents of the invention [0...
Claims
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IPC IPC(8): B23P15/00
CPCB23P15/00Y02E10/20
Inventor 刘治国张学刚张宏伟刘洋李洁明关亮
Owner 一重集团(黑龙江)重工有限公司