High-efficiency machining method for tube plate group holes of ap1000 steam generator
A steam generator and processing technology technology, applied in metal processing equipment, metal processing mechanical parts, manufacturing tools, etc., can solve problems such as unreasonable influence control, out of tolerance hole position, uncontrollable, etc., to save working time, The effect of reducing cumulative errors and improving work efficiency
Active Publication Date: 2015-11-25
HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP
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Problems solved by technology
[0004] Deep hole processing of evaporator tube sheets has always been a difficult problem for nuclear power equipment manufacturers. The deep hole processing of evaporator tube sheets is different from single hole or a small number of tube hole deep hole processing. This type of tube sheet hole processing needs to ensure that equipment, tools The stability of the entire deep hole processing system, technology, etc. In the past, during the deep hole processing of nuclear power tube sheets, poor design of supporting key tooling (guide sleeves, spacing blocks), lack of BTA drill selection and use experience caused tool chipping and tool breakage. Unreasonable life impact control, insufficient grasp of the cutting performance of the tube sheet material, or unreasonable selection of processing technology parameters will affect the accuracy, straightness and smoothness of the tube hole, and the cumulative error caused by multiple positioning and repeated positioning of the machine tool often results in hole position accuracy. out of control
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[0056] The following describes the present invention in detail, and the features and advantages of the present invention will become more clear and definite along with these descriptions.
[0057] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
[0058]In a preferred embodiment of the present invention, such as Figure 1-4 As shown in , a method for efficiently processing steam generator tube plate group holes is provided. The method is carried out by an improved CNC three-axis deep hole drilling machine, and the improved CNC three-axis deep hole drilling machine is included in the CNC three-axis deep hole drilling machine. The installed tube plate...
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The invention discloses an AP1000 steam generator tube plate group hole high-efficiency machining technology and method. The method is conducted through an improved numerical control three-shaft gun drilling machine. The improved numerical control three-shaft gun drilling machine comprises a tube plate clamping tool, a tube plate displacement monitoring system installed on a tube plate to be machined, a tool installed on the numerical control three-shaft gun drilling machine, and an ancillary tool installed on the numerical control three-shaft gun drilling machine. The machining method comprises the following steps of (1) conducting annealing heat treatment on the tube plate to be machined so as to improve the cutting effect of the numerical control gun drilling machine; (2) fixing the tube plate to be machined onto a working platform by the adoption of a binding fixing method so that the tube plate to be machined cannot move during long-period punching, and installing the tube plate displacement monitoring system on the tube plate to be machined; (3) conducing drilling on the tube plate to be machined.
Description
technical field [0001] The invention relates to a processing method for group holes of a tube sheet, in particular to a high-efficiency processing method for group holes of a steam generator tube sheet applied to the tube sheet of an AP1000 steam generator. Background technique [0002] A steam generator refers to a mechanical device that uses heat energy (such as electric energy) from fuel or other energy sources to heat water into steam. [0003] The tube plate is a kind of accessory that drills a hole slightly larger than the outer diameter of the pipe on the steel plate, and penetrates the pipe into it and welds it to fix it. [0004] Deep hole processing of evaporator tube sheets has always been a difficult problem for nuclear power equipment manufacturers. The deep hole processing of evaporator tube sheets is different from single hole or a small number of tube hole deep hole processing. This type of tube sheet hole processing needs to ensure that equipment, tools The...
Claims
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IPC IPC(8): B23B35/00B23B41/02B23Q3/06
Inventor 韩君杨松马东华于均刚杨圆明和广庆张楠琦
Owner HARBIN ELECTRIC CORP QINHUANGDAO HEAVY EQUIP