Tool and method for measuring distance between two end faces of stationary blade hole of cartridge receiver

Abstract

The invention discloses a tool and method for measuring the distance between two end faces of a casing type stationary blade hole, and belongs to the technical field of measuring tools. The positioning column is coaxially screwed and matched with the positioning sleeve; the hole two-end-face standard part is located between the positioning column and the positioning sleeve; a clamping sleeve rod of the dial indicator is inserted into the positioning sleeve, and a measuring head of the dial indicator abuts against and contacts with the positioning column; the clamping sleeve rod of the dial indicator and the positioning sleeve are fixed through a fastening screw; the positioning column is sequentially provided with a cap section, a light column section, a threaded section and a reference section in the axial direction. A threaded hole section and an unthreaded hole section are sequentially arranged in the central hole channel of the positioning sleeve in the axial direction. The tool and method for measuring the distance between the two end faces of the stationary blade hole of the cartridge receiver can completely replace a three-coordinate measuring machine to complete detection of the distance between the two end faces of the hole, detection can be independently completed by a single person in the part machining process, and the tool and method have the advantages of being simple in structure, easy and convenient to operate, high in detection efficiency and low in detection cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of measuring tools, and particularly relates to a measuring tool and a measuring method for measuring the distance between two end faces of a static blade hole of a casing type. Background Art

[0002] At present, there are numerous installation holes for static blades on the casings of aero-engines and large gas turbines. During the machining stage of these static blade holes, it is necessary to measure the distance between the two end faces of the holes to detect the machining quality of the parts.

[0003] However, due to interference problems at the detection site, traditional micrometers and calipers cannot be used, resulting in the distance between the two end faces of the holes can only be detected by a coordinate measuring machine after the parts are machined. During detection, three points are taken on each of the two end faces of the hole to establish a plane, and then the distance between the planes is calculated through software.

[0004] Since the coordinate measuring machine cannot be used to complete the detection during the machining process of the parts, there are problems of low detection efficiency and high detection cost. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the present invention provides a measuring tool and a measuring method for measuring the distance between two end faces of a static blade hole of a casing type, which can completely replace the coordinate measuring machine to complete the detection of the distance between the two end faces of the hole, and can be independently completed by a single person during the machining process of the parts, and has the characteristics of simple structure, convenient operation, high detection efficiency and low detection cost.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme: A measuring tool for measuring the distance between two end faces of a static blade hole of a casing type, comprising a positioning column, a positioning sleeve, a dial indicator, a fastening screw and a standard part for the two end faces of the hole; the positioning column and the positioning sleeve are coaxially screwed and matched; the standard part for the two end faces of the hole is located between the positioning column and the positioning sleeve; the clamping sleeve rod of the dial indicator is inserted into the positioning sleeve, and the measuring head of the dial indicator abuts against the positioning column; the clamping sleeve rod of the dial indicator is fixed to the positioning sleeve through a fastening screw.

[0007] The positioning column is successively provided with a cap head section, a light column section, a threaded section and a reference section along the axial direction; the diameter of the cap head section is larger than that of the light column section, the diameter of the light column section is larger than that of the threaded section, and the diameter of the threaded section is larger than that of the reference section; the diameter of the light column section is equal to the inner diameter of the central circular hole of the standard part for the two end faces of the hole and is in clearance fit.

[0008] The axial shoulder surface of the cap head section and the light column section is set as the first reference surface.

[0009] The axial end surface of the reference section is set as the second reference surface.

[0010] The central hole of the positioning sleeve is axially successively provided with a threaded hole section and a smooth hole section; the threaded hole section is in screw connection with the threaded section of the positioning column; the inner diameter of the smooth hole section is equal to the diameter of the clamping sleeve rod of the micrometer and is in clearance fit; a through fastening screw mounting screw hole is provided on the smooth hole section, and the fastening screw mounting screw hole is vertically distributed with respect to the central hole of the positioning sleeve, and the screw rod of the fastening screw is in screw connection with the fastening screw mounting screw hole.

[0011] The axial end face of the threaded hole section is set as the third reference plane.

[0012] The standard parts at both end faces of the hole adopt an open-ring structure, and a central circular hole is provided at the center of the standard parts at both end faces of the hole; one end face of the central circular hole is set as the fourth reference plane, and the other end face of the central circular hole is set as the fifth reference plane.

[0013] A method for measuring the distance between the two end faces of the stationary blade hole of the casing type uses the measuring tool for the distance between the two end faces of the stationary blade hole of the casing type, and includes the following steps: Step 1: Select the standard parts at both end faces of the hole that match the part to be measured; Step 2: Sleeve the standard parts at both end faces of the hole on the light column section of the positioning column, and make the first reference plane of the positioning column abut against the fourth reference plane of the standard parts at both end faces of the hole; Step 3: Screw the threaded section of the positioning column 1 and the threaded hole section of the positioning sleeve together until the fifth reference plane of the standard parts at both end faces of the hole abuts against the third reference plane of the positioning sleeve, and at the same time ensure that the positioning sleeve is in a tightened state; Step 4: Insert the clamping sleeve rod of the micrometer into the smooth hole section of the positioning sleeve, and make the measuring head of the micrometer abut against the second reference plane of the positioning column, and at the same time ensure that the compression amount of the measuring head is not less than 1 mm; Step 5: Screw the fastening screw to make the screw rod of the fastening screw press on the clamping sleeve rod of the micrometer to complete the fixation of the clamping sleeve rod of the micrometer and the positioning sleeve; Step 6: Rotate the indication dial of the micrometer to make the pointer of the micrometer zero; Step 7: Loosen the threaded connection between the threaded section of the positioning column and the threaded hole section of the positioning sleeve, and remove the standard parts at both end faces of the hole from the positioning column; Step 8: Insert the light column section of the positioning column into the mounting hole of the part to be measured, and make the first reference plane abut against one end face of the mounting hole of the part to be measured; Step 9: Screw the threaded section of the positioning column and the threaded hole section of the positioning sleeve together again until the other end face of the mounting hole of the part to be measured abuts against the third reference plane of the positioning sleeve, and at the same time ensure that the positioning sleeve is in a tightened state. At this time, the measuring head of the micrometer abuts against the second reference plane of the positioning column again; Step 10: Read the reading of the pointer of the dial indicator on the dial. This reading is the difference between the distance between the two end faces of the mounting hole of the part to be measured and the standard value of the distance between the two end faces of the hole of the standard part for the two end faces of the hole. By summing the difference and the standard value of the distance between the two end faces of the hole, the actual value of the distance between the two end faces of the mounting hole of the part to be measured can be obtained.

[0014] Advantages of the present invention: The measuring tool and method for the distance between the two end faces of the stationary blade hole of the casing class of the present invention can completely replace the coordinate measuring machine to complete the detection of the distance between the two end faces of the hole, and can be independently completed by a single person during the part processing. It has the characteristics of simple structure, easy operation, high detection efficiency and low detection cost. Description of the drawings

[0015] Figure 1 is a schematic structural diagram of a measuring tool for the distance between the two end faces of the stationary blade hole of the casing class of the present invention; Figure 2 is a schematic structural diagram of the positioning post of the present invention; Figure 3 is a schematic structural diagram of the positioning sleeve of the present invention; Figure 4 is a schematic structural diagram of the standard part for the two end faces of the hole of the present invention; Figure 5 is a schematic diagram of the cooperation between a measuring tool for the distance between the two end faces of the stationary blade hole of the casing class of the present invention and a part; In the figure, 1 - positioning post, 1.1 - cap head section, 1.2 - light column section, 1.3 - threaded section, 1.4 - reference section, 1.5 - first reference surface, 1.6 - second reference surface, 2 - positioning sleeve, 2.1 - threaded hole section, 2.2 - light hole section, 2.3 - fastening screw mounting screw hole, 2.4 - third reference surface, 3 - dial indicator, 3.1 - clamping sleeve rod, 3.2 - measuring head, 4 - fastening screw, 5 - standard part for the two end faces of the hole, 5.1 - central round hole, 5.2 - fourth reference surface, 5.3 - fifth reference surface, 6 - part to be measured. Detailed implementation manners

[0016] The following further elaborates on the present invention in detail with reference to the drawings and specific embodiments.

[0017] As Figures 1 to 5 shown, a measuring tool for the distance between the two end faces of the stationary blade hole of the casing class includes a positioning post 1, a positioning sleeve 2, a dial indicator 3, a fastening screw 4 and a standard part 5 for the two end faces of the hole; the positioning post 1 and the positioning sleeve 2 are coaxially screwed and matched; the standard part 5 for the two end faces of the hole is located between the positioning post 1 and the positioning sleeve 2; the clamping sleeve rod 3.1 of the dial indicator 3 is inserted into the positioning sleeve 2, and the measuring head 3.2 of the dial indicator 3 abuts against the positioning post 1; the clamping sleeve rod of the dial indicator 3 and the positioning sleeve 2 are fixed by a fastening screw 4.

[0018] The positioning post 1 is axially provided with a cap head section 1.1, a light column section 1.2, a threaded section 1.3 and a reference section 1.4 in sequence; the diameter of the cap head section 1.1 is greater than that of the light column section 1.2, the diameter of the light column section 1.2 is greater than that of the threaded section 1.3, and the diameter of the threaded section 1.3 is greater than that of the reference section 1.4; the diameter of the light column section 1.2 is equal to the inner diameter of the central circular hole 5.1 of the standard parts 5 on both end faces of the hole and is in clearance fit.

[0019] The shoulder surface between the cap head section 1.1 and the light column section 1.2 is set as the first reference surface 1.5.

[0020] The axial end face of the reference section 1.4 is set as the second reference surface 1.6.

[0021] The central hole of the positioning sleeve 2 is axially provided with a threaded hole section 2.1 and a smooth hole section 2.2 in sequence; the threaded hole section 2.1 is in screw connection with the threaded section 1.3 of the positioning post 1; the inner diameter of the smooth hole section 2.2 is equal to the diameter of the clamping sleeve rod 3.1 of the dial indicator 3 and is in clearance fit; a through fastening screw installation screw hole 2.3 is arranged on the smooth hole section 2.2, and the fastening screw installation screw hole 2.3 is vertically distributed with respect to the central hole of the positioning sleeve 2, and the screw rod of the fastening screw 4 is in screw connection with the fastening screw installation screw hole 2.3.

[0022] The axial end face of the threaded hole section 2.1 is set as the third reference surface 2.4.

[0023] The standard parts 5 on both end faces of the hole adopt an open-ring structure, and a central circular hole 5.1 is arranged at the center of the standard parts 5 on both end faces of the hole; one end face of the central circular hole 5.1 is set as the fourth reference surface 5.2, and the other end face of the central circular hole 5.1 is set as the fifth reference surface 5.3.

[0024] A method for measuring the distance between the two end faces of the static blade holes of the casing class uses the above-mentioned distance measuring tool for the two end faces of the static blade holes of the casing class, and includes the following steps: Step 1: Select the standard parts 5 on both end faces of the hole that match the part 6 to be measured. Step 2: Sleeve the standard parts 5 on both end faces of the hole on the light column section 1.2 of the positioning post 1, and make the first reference surface 1.5 of the positioning post 1 abut against the fourth reference surface 5.2 of the standard parts 5 on both end faces of the hole. Step 3: Screw the threaded section 1.3 of the positioning post 1 and the threaded hole section 2.1 of the positioning sleeve 2 together until the fifth reference surface 5.3 of the standard parts 5 on both end faces of the hole abuts against the third reference surface 2.4 of the positioning sleeve 2, and at the same time ensure that the positioning sleeve 2 is in a tightened state. Step 4: Insert the clamping sleeve rod 3.1 of the dial indicator 3 into the light hole section 2.2 of the positioning sleeve 2, and make the probe 3.2 of the dial indicator 3 abut against the second reference surface 1.6 of the positioning post 1, while ensuring that the compression amount of the probe 3.2 is not less than 1 mm; Step 5: Screw the fastening screw 4 to make the screw rod of the fastening screw 4 press against the clamping sleeve rod 3.1 of the dial indicator 3, and complete the fixation of the clamping sleeve rod 3.1 of the dial indicator 3 and the positioning sleeve 2; Step 6: Rotate the dial of the dial indicator 3 to zero the pointer of the dial indicator 3; Step 7: Loosen the threaded connection between the threaded section 1.3 of the positioning post 1 and the threaded hole section 2.1 of the positioning sleeve 2, and remove the hole end face standard part 5 from the positioning post 1; Step 8: Insert the light column section 1.2 of the positioning post 1 into the mounting hole of the part to be measured 6, and make the first reference surface 1.5 abut against one end face of the mounting hole of the part to be measured 6; Step 9: Re-screw the threaded section 1.3 of the positioning post 1 and the threaded hole section 2.1 of the positioning sleeve 2 together until the other end face of the mounting hole of the part to be measured 6 abuts against the third reference surface 2.4 of the positioning sleeve 2, while ensuring that the positioning sleeve 2 is in a tightened state. At this time, the probe 3.2 of the dial indicator 3 abuts against the second reference surface 1.6 of the positioning post 1 again; Step 10: Read the reading of the pointer of the dial indicator 3 on the dial. This reading is the difference between the distance between the two end faces of the mounting hole of the part to be measured 6 and the standard value of the distance between the two end faces of the hole of the hole end face standard part 5. By summing the difference and the standard value of the distance between the two end faces of the hole, the actual value of the distance between the two end faces of the mounting hole of the part to be measured 6 can be obtained.

[0025] The solutions in the embodiments are not intended to limit the protection scope of the present invention. Any equivalent implementation or modification without departing from the present invention is included in the protection scope of the present invention.

Claims

1. A tool for measuring the distance between the two end faces of a casing-type stationary blade hole, characterized in that: It includes a positioning column, a positioning sleeve, a micrometer, a fastening screw and standard parts on both end surfaces of the hole; the positioning column and the positioning sleeve are coaxially threaded together; the standard parts on both end surfaces of the hole are located between the positioning column and the positioning sleeve; the clamping sleeve rod of the micrometer is inserted into the positioning sleeve, and the probe of the micrometer is in contact with the positioning column; the clamping sleeve rod of the micrometer and the positioning sleeve are fixed by fastening screws.

2. A tool for measuring the distance between both end surfaces of a casing-type stationary blade hole according to claim 1, characterized in that: The positioning column is arranged in sequence along the axial direction as a cap head section, a light column section, a threaded section and a reference section; the diameter of the cap head section is larger than the diameter of the light column section, the diameter of the light column section is larger than the diameter of the threaded section, and the diameter of the threaded section is larger than the diameter of the reference section; the diameter of the light column section is equal to the inner diameter of the central circular hole of the standard parts at both end surfaces of the hole and is a clearance fit.

3. A tool for measuring the distance between both end surfaces of a casing-type stationary blade hole according to claim 2, characterized in that: The shoulder surfaces of the cap head section and the light column section are set as the first reference plane.

4. A tool for measuring the distance between both end surfaces of a casing-type stationary blade hole according to claim 2, characterized in that: The axial end surface of the reference section is set as a second reference surface.

5. The tool for measuring the distance between both end surfaces of a casing-type stationary blade hole according to claim 1, characterized in that: The central hole of the positioning sleeve is axially arranged as a threaded hole section and a light hole section in sequence; the threaded hole section is threadedly matched with the threaded section of the positioning column; the inner diameter of the light hole section is equal to the diameter of the clamping sleeve rod of the micrometer and is a clearance match; a through fastening screw mounting screw hole is arranged on the light hole section, the fastening screw mounting screw hole is vertically distributed with the central hole of the positioning sleeve, and the screw rod of the fastening screw is threadedly matched with the fastening screw mounting screw hole.

6. A tool for measuring the distance between both end surfaces of a casing-type stationary blade hole according to claim 5, characterized in that: The axial end surface of the threaded hole section is set as the third reference surface.

7. A tool for measuring the distance between both end surfaces of a casing-type stationary blade hole according to claim 1, characterized in that: The two end surface standard parts of the hole adopt an open hole annular structure, and a central circular hole is arranged at the center of the two end surface standard parts of the hole; one end surface of the central circular hole is set as the fourth reference plane, and the other end surface of the central circular hole is set as the fifth reference plane.

8. A method for measuring the distance between the two end faces of a casing-type stationary blade hole, using the tool for measuring the distance between the two end faces of a casing-type stationary blade hole according to claim 1, characterized in that: The steps include: Step 1: Select standard parts at both end surfaces of the hole that match the part to be tested; Step 2: Put the standard parts of the two end surfaces of the hole into the optical column section of the positioning column, so that the first reference surface of the positioning column and the fourth reference surface of the standard parts of the two end surfaces of the hole are close to each other; Step 3: Screw the threaded section of the positioning column 1 and the threaded hole section of the positioning sleeve together until the fifth reference surface of the standard parts at both end surfaces of the hole and the third reference surface of the positioning sleeve are in contact with each other, and ensure that the positioning sleeve is in a tightened state; Step 4: Insert the clamping sleeve rod of the micrometer into the light hole section of the positioning sleeve, so that the probe of the micrometer rests on the second reference surface of the positioning column, and at the same time ensure that the compression of the probe is not less than 1mm; Step 5: Tighten the fastening screw so that the screw rod of the fastening screw is pressed against the clamping sleeve rod of the dial gauge to complete the fixation of the clamping sleeve rod of the dial gauge and the positioning sleeve; Step 6: Rotate the dial of the dial indicator to return the pointer of the dial indicator to zero; Step 7: Loosen the threaded connection between the threaded section of the positioning column and the threaded hole section of the positioning sleeve, and remove the standard parts at both end surfaces of the hole from the positioning column; Step 8: Insert the optical column section of the positioning column into the mounting hole of the part to be measured, so that the first reference surface is close to one side end surface of the mounting hole of the part to be measured; Step 9: Screw the threaded section of the locating column and the threaded hole section of the locating sleeve together again until the other side end surface of the mounting hole of the part to be measured is in contact with the third reference surface of the locating sleeve, and at the same time ensure that the locating sleeve is in a tightened state. At this time, the probe of the micrometer is against the second reference surface of the locating column again; Step 10: Read the reading of the micrometer pointer on the dial. The reading is the difference between the distance between the two end faces of the mounting hole of the part to be tested and the standard value of the distance between the two end faces of the hole of the standard part. By summing the difference with the standard value of the distance between the two end faces of the hole, the actual value of the distance between the two end faces of the mounting hole of the part to be tested can be obtained.

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