Turbine hollow blade rabbet processing locating clamping method and device

A hollow blade, positioning and clamping technology, used in positioning devices, manufacturing tools, metal processing equipment, etc., can solve the problems of toxicity, operator health damage, and high cost

Inactive Publication Date: 2009-04-29
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its disadvantages are also obvious. Because the low melting point alloy used is toxic to the human body, it will cause great damage to the health of the operating workers in the long run.
At the same time, the proces

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  • Turbine hollow blade rabbet processing locating clamping method and device
  • Turbine hollow blade rabbet processing locating clamping method and device
  • Turbine hollow blade rabbet processing locating clamping method and device

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Embodiment Construction

[0028] Selection scheme of anchor points

[0029] In order to ensure the stable positioning of the mortise 14 during processing, the positioning reference and the design reference should coincide as much as possible, first select the blade design reference point on the blade mounting plate 15 as a positioning point d5, and then according to the three-dimensional mathematical model of the blade surface 16, in Select another five anchor points d1, d2, d3, d4, d6 on its surface. Firstly, the precision-constrained mathematical model of the positioning point is established based on the position error of the positioning point caused by the disturbance of the workpiece position; then, the bi-cubic B-spline is used to fit the position coordinates of the feature points obtained from the design on the blade profile, and the feature points including the normal vector are calculated The space vector of the positioning point is obtained to obtain the point set space of the positioning poin...

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Abstract

The invention discloses a clamping method and a fixture of processing and locating of a turbine hollow blade tenon. In the selection of locating points, five optimum locating points are selected by adopting a fixture precision theory based on the differential geometry, a form closure rule of locating points with the help of a blade surface three-dimensional model and so when six points comprising a benchmark are used for location, the precision of blade location is the highest; in the selection of clamping points, weak links are avoided and auxiliary clamping points are chosen on a tenon top end and a blade mounting plate which are better in rigidity and bigger in size for reducing as much stress and deformation as possible to the hollow blade. On the basis, the invention designs a special fixture for processing the blade tenon, which consists of a fixture body, a location pin, auxiliary fixtures of the tenon top end and the blade mounting plate. The fixture can ensure the accurate location and effective clamping in the processing of the turbine hollow blade tenons, improve the efficiency in the manufacturing process of complex curved hollow blades, reduce the cost and eliminate the harm to human health.

Description

technical field [0001] The invention belongs to a machining and positioning method for turbine blades and a special fixture design, in particular to a positioning and clamping method and a fixture for machining the tenon of a hollow moving blade of a gas turbine turbine. Background technique [0002] A gas turbine is a rotary impeller power mechanical device that converts the heat energy generated by the combustion of gas or liquid fuel (such as natural gas, fuel oil) into mechanical work. It is widely used in energy, aviation, transportation, national defense and other fields. And the key major equipment for the development of aviation industry. The high-temperature turbine blade is the part with the highest temperature (above 1400°C), the most complex stress, and the harshest environment in the gas turbine. Its value accounts for nearly 50% of the whole product and is a key component in the gas turbine. The use of cooling blade structure is the most effective measure to i...

Claims

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Application Information

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IPC IPC(8): B23Q3/06
Inventor 梅雪松姜歌东陶涛王恪典王文君杨帆刘志会王煜
Owner XI AN JIAOTONG UNIV
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