A Comprehensive Measuring Method of Coaxial Hole Mounting Seat
A technology of comprehensive measurement and coaxial hole, applied in the field of measurement, can solve the problems such as the dial indicator and the probe can not reach the measurement position, the detection of the geometric tolerance index is difficult, and the measurement scheme cannot be formed, and achieves good effect and simple structure. , the effect of shortening the detection time
Active Publication Date: 2018-10-23
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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Problems solved by technology
Affected by wool and measurement space, there are some important problems of difficult detection of geometric tolerance indicators in the processing of mounting seats
[0003] In the process of processing, a single measuring tool is only used to measure the groove width and aperture size, and it is difficult to detect the important dimensions of the parts
Using conventional detection methods, such as: metering method and coordinate machine inspection, due to the narrow detection space, the dial indicator and probe cannot reach the measurement position, and an effective measurement plan cannot be formed. The detection time is long through indirect measurement methods. Poor detection effect
Method used
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Embodiment Construction
[0014] Such as Figure 1~4 As shown, a comprehensive measurement method of the coaxial hole mounting seat, the technical requirements of the coaxial hole mounting seat 3 are as follows:
[0015] (1) The coaxiality requirement of the double-layer coaxial hole is 0.2 / 100mm;
[0016] (2) The perpendicularity between the end face of the crank installation groove and the coaxial hole is 0.2 / 100mm;
[0017] (3) The depth dimension between the center of the coaxial hole and the bottom of the crank installation groove is 10+1.0mm.
[0018] The professional measuring tool includes a mandrel 1 and a measuring rod 2. The mandrel 1 is made to measure the coaxiality of the coaxial hole 4, the front end of the measuring rod 2 is a measuring head, and the center of the measuring head is provided with a circular hole , The circular hole is matched with the mandrel 1, the outer circle of the probe has two arcs, and the radius of the two arcs is 10mm and 11mm respectively; the method includes the foll...
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The invention relates to a measurement method and especially relates to a comprehensive measurement method of a coaxial hole installation seat. In the method, professional measuring tools are used. The professional measuring tools comprise a mandrel and a measuring rod. The mandrel is cooperated with a coaxial hole. A front end of the measuring rod is a measuring head. A center of the measuring head is provided with a circular hole. The circular hole is cooperated with the mandrel. An excircle of the measuring head possesses two arcs. Radius sizes of the two arcs are a through-stop size from a coaxial hole center to a crank installation groove bottom respectively. The method comprises the following steps that 1, the mandrel penetrates into the coaxial hole to inspect coaxiality of the coaxial hole; 2, the mandrel penetrates into the circular hole of the measuring rod via the coaxial hole and detects a verticality error of a crank installation groove and the coaxial hole based on assembly of the mandrel and the measuring rod; 3, the measuring rod rotates about the mandrel to inspect a depth size of the crank installation groove. By using the measurement method in the invention, a shape and location relation between the coaxial hole and the installation groove and a quality state of a component can be rapidly and visually detected and a measurement process is simplified.
Description
Technical field [0001] The invention relates to a measuring method, in particular to a comprehensive measuring method of a coaxial hole mounting seat. Background technique [0002] A protruding double-layer coaxial hole mounting seat structure is distributed on the circumference of a certain part of an aero engine, and the coaxial hole and the mounting groove have a coordinated shape and position relationship, see attached image 3 The mounting seat is used as the fixed end of the crank tie rod, and the tie rod shaft rotates in the mounting seat hole to drive the rear adjustment plate to move and control the air flow performance index of the engine. The crank installation groove between the double-side bosses has a high dimensional accuracy. In order to make the crank head rotate in a certain range, the bottom of the crank groove is given a depth dimension from the center line of the coaxial hole. Affected by wool and measuring space, there are some important geometric tolerance i...
Claims
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IPC IPC(8): G01B5/252G01B5/245G01B5/18
CPCG01B5/003G01B5/18G01B5/245G01B5/252
Inventor 李莹杨平魏乾星姚强刘志强
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION