Chord distance gauge for testing circumferential position error of flange bolt hole
A technology of circumferential position and flange bolts, applied in the field of chord gauges, can solve the problems of low detection efficiency, high requirements, and increased detection costs.
Inactive Publication Date: 2016-07-20
ZHANGJIAGANG HAILU ANNULAR FORGINGS
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Problems solved by technology
At present, the operator usually holds a vernier caliper to detect the circumferential position error of the flange bolt hole. The disadvantages of this detection method are: (1) the detection efficiency is low; (2) the use of the vernier caliper requires highly skilled workers. (3) The vernier caliper is easily damaged, which will increase the detection cost
Method used
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Embodiment Construction
[0015] The present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.
[0016] Such as figure 1 As shown, the chord gauge used to detect the circumferential position error of the flange bolt hole includes: a positioning plate 1, five positioning holes 11 are distributed on the positioning plate 1, and the centers of all positioning holes 11 are on the same indexing circle above, and the positions of all positioning holes 11 conform to the design requirements of the circumferential position error of flange bolt holes. The indexing circles are concentric, the thickness of the positioning plate 1 is 12~16mm, the width of the positioning plate 1 is 80~120mm, and the distance from the side of the positioning plate 1 to the center of the positioning hole 11 is equal to 1.5 times the diameter of the positioning hole 11. Control the size of the positioning plate 1, thereby saving materials and reducing weight, so th...
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The invention discloses a chord distance gauge for testing circumferential position error of a flange bolt hole. The chord distance gauge comprises a positioning board on which at least five positioning holes are distributed. The circle centers of all positioning holes are in a reference cycle. Furthermore the positions of all positioning holes accord with a circumferential position error designing requirement of the flange bolt hole. Each positioning hole is internally provided with a lining which has high wearing resistance, wherein the thickness of the lining is larger than that of the positioning board. Each lining is internally provided with a positioning pin movably, wherein the positioning pin is in matched plugging with the flange bolt hole. Two ends of the positioning board are respectively provided with a handle which can be used for lifting the positioning board. The top end of each positioning pin is provided with a suspension ring which can be used for lifting the positioning pin. In batch production of same-standard large flanges, The chord distance gauge can quickly and accurately test the circumferential position error of each flange bolt hole of the flanges in one batch, thereby greatly improving testing efficiency.
Description
technical field [0001] The invention relates to a testing tool for testing whether a large flange is qualified, in particular to a chord gauge used for testing whether the circumferential position error of a flange bolt hole is qualified. Background technique [0002] In order to install and fix the flange, several through holes for passing bolts are provided along the circumferential direction on the flange, which are usually called flange bolt holes. According to actual needs, one or more circles of flange bolt holes can be set on the flange. In theory, the centers of all flange bolt holes on the same circle are required to be evenly distributed on the circumference of the same circle. This circle is usually called Pitch circle. In the actual production design, it is required that the two position errors of all flange bolt holes on the same index circle do not exceed the design range, one is that the circumferential position errors of all flange bolt holes on the same ind...
Claims
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IPC IPC(8): G01B5/14
CPCG01B5/143
Inventor 朱乾皓徐锋陈磊吴晋三范禹刘晔
Owner ZHANGJIAGANG HAILU ANNULAR FORGINGS