A kind of distance measuring tool and measuring method of two end faces of a casing type stationary vane hole

Abstract

A kind of casing type static vane hole two end face distance measuring tool and measuring method, belong to measuring tool technical field, tool includes positioning column, positioning sleeve, dial gauge, fastening screw and hole two end face standard parts;Positioning column and positioning sleeve coaxial screw joint;Hole two end face standard parts are located between positioning column and positioning sleeve;The clamping sleeve rod of dial gauge is inserted in positioning sleeve, and the measuring head of dial gauge is in contact with the top of positioning column;The clamping sleeve rod of dial gauge and positioning sleeve are fixed by fastening screw;Positioning column is in turn provided with cap head section, light column section, threaded section and reference section along axial direction;The central channel of positioning sleeve is in turn provided with threaded hole section and light hole section along axial direction.The casing type static vane hole two end face distance measuring tool and measuring method of the application can completely replace three-coordinate measuring machine to complete the detection of hole two end face distance, and can be independently completed by a single person during part machining process, with the characteristics of simple structure, easy operation, high detection efficiency and low detection cost.

Description

Technical Field

[0001] This invention belongs to the field of measuring tool technology, and in particular relates to a tool and method for measuring the distance between the two end faces of a stationary leaf hole in a casing. Background Technology

[0002] Currently, there are numerous mounting holes for stationary blades on the casings of aircraft engines and large gas turbines. During the machining stage, the distance between the two end faces of these stationary blade holes needs to be measured to check the machining quality of the parts.

[0003] However, due to interference issues at the inspection points, traditional micrometers and calipers cannot be used. As a result, the distance between the two end faces of the hole can only be inspected by a coordinate measuring machine after the part is machined. During the inspection, three points are first taken on each end face of the hole to create a plane, and then the distance between the planes is calculated by software.

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

[0005] To address the problems existing in the prior art, this invention provides a tool and method for measuring the distance between the two end faces of a stationary blade hole in a casing. This tool and method can completely replace a coordinate measuring machine to measure the distance between the two end faces of the hole. The measurement can be performed independently by a single person during the part processing. It features simple structure, easy operation, high measurement efficiency, and low measurement cost.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a distance measuring tool for the two end faces of a stationary blade hole in a casing, comprising a positioning post, a positioning sleeve, a dial indicator, fastening screws, and standard parts for the two end faces of the hole; the positioning post and the positioning sleeve are coaxially screwed together; the standard parts for the two end faces of the hole are located between the positioning post and the positioning sleeve; the clamping rod of the dial indicator is inserted into the positioning sleeve, and the probe of the dial indicator is in contact with the top of the positioning post; the clamping rod of the dial indicator and the positioning sleeve are fixed by fastening screws.

[0007] The positioning pin is sequentially configured along the axial direction as a cap section, a smooth column section, a threaded section, and a reference section; the diameter of the cap section is greater than the diameter of the smooth column section, the diameter of the smooth column section is greater than the diameter of the threaded section, and the diameter of the threaded section is greater than the diameter of the reference section; the diameter of the smooth column section is equal to the inner diameter of the central circular hole of the standard part on both ends of the hole and is a clearance fit.

[0008] The shoulder surfaces of the cap section and the light column section are set as the first reference surface.

[0009] The axial end face of the reference segment is designated as the second reference surface.

[0010] The central channel of the positioning sleeve is sequentially configured with a threaded hole section and a smooth hole section along the axial direction; the threaded hole section is screwed into the threaded section of the positioning post; the inner diameter of the smooth hole section is equal to the diameter of the clamping sleeve rod of the dial indicator and is clearance-fitted; a through fastening screw mounting hole is provided on the smooth hole section, the fastening screw mounting hole is perpendicular to the central channel of the positioning sleeve, and the screw of the fastening screw is screwed into the fastening screw mounting hole.

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

[0012] The standard parts on both ends of the hole adopt an open ring structure, and a central circular hole is provided in the center of the standard parts on both ends of the hole; one end face of the central circular hole is designated as the fourth reference surface, and the other end face of the central circular hole is designated as the fifth reference surface.

[0013] A method for measuring the distance between the two end faces of a casing-type stator vane hole, using the aforementioned tool for measuring the distance between the two end faces of a casing-type stator vane hole, includes the following steps: Step 1: Select standard parts for both end faces of the holes that match the part to be tested; Step 2: Fit the standard parts on both ends of the hole onto the light column section of the positioning post, so that the first reference surface of the positioning post is in contact with the fourth reference surface of the standard parts on both ends of the hole. Step 3: Screw the threaded section of the positioning pin 1 together with the threaded hole section of the positioning sleeve until the fifth reference surface of the standard part at both ends of the hole is in contact with the third reference surface of the positioning sleeve, while ensuring that the positioning sleeve is in a tightened state. Step 4: Insert the clamping rod of the dial indicator into the optical hole section of the positioning sleeve, so that the probe of the dial indicator rests against the second reference surface of the positioning column, while ensuring that the compression of the probe is not less than 1mm. Step 5: Tighten the fastening screws to press the screw threads onto the micrometer's clamping sleeve, thus fixing the micrometer's clamping sleeve to the positioning sleeve. Step Six: Rotate the dial of the dial indicator until the pointer returns to zero; Step 7: Loosen the threaded connection between the threaded section of the positioning pin and the threaded hole section of the positioning sleeve, and remove the standard parts on both ends of the hole from the positioning pin. Step 8: Connect the optical column segment of the positioning post to the mounting hole of the part to be tested, so that the first reference surface is in contact with one end face of the mounting hole of the part to be tested; Step 9: Reconnect the threaded section of the positioning pin to the threaded hole section of the positioning sleeve until the other end face of the mounting hole of the part to be measured is in contact with the third reference surface of the positioning sleeve, while ensuring that the positioning sleeve is in a tightened state. At this time, the probe of the dial indicator is back against the second reference surface of the positioning pin. Step 10: Read the reading of the dial indicator pointer 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. 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 measured can be obtained.

[0014] The beneficial effects of this invention are: The distance measuring tool and method for measuring the distance between the two end faces of the stationary blade hole 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. It can be completed independently by a single person during the part processing. It has the characteristics of simple structure, easy operation, high detection efficiency and low detection cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a distance measuring tool between the two end faces of a casing-type stator hole according to the present invention; Figure 2 This is a schematic diagram of the positioning post of the present invention; Figure 3 This is a schematic diagram of the positioning sleeve of the present invention; Figure 4 This is a schematic diagram of the structure of the standard part with two end faces of the hole according to the present invention; Figure 5 This is a schematic diagram of a distance measuring tool for the two end faces of a casing-type stator hole, used in conjunction with a part, according to the present invention; In the diagram, 1—positioning pin, 1.1—cap section, 1.2—smooth section, 1.3—threaded section, 1.4—datum section, 1.5—first datum surface, 1.6—second datum surface, 2—positioning sleeve, 2.1—threaded hole section, 2.2—smooth hole section, 2.3—fastening screw mounting hole, 2.4—third datum surface, 3—dial indicator, 3.1—clamping sleeve rod, 3.2—probe, 4—fastening screw, 5—standard parts on both ends of the hole, 5.1—center circular hole, 5.2—fourth datum surface, 5.3—fifth datum surface, 6—part to be measured. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] like Figures 1-5 As shown, a distance measuring tool for the two end faces of a stationary vane hole in a casing includes a positioning post 1, a positioning sleeve 2, a dial indicator 3, fastening screws 4, and standard parts 5 for the two end faces of the hole; the positioning post 1 and the positioning sleeve 2 are coaxially screwed together; the standard parts 5 for the two end faces of the hole are located between the positioning post 1 and the positioning sleeve 2; the clamping rod 3.1 of the dial indicator 3 is inserted into the positioning sleeve 2, and the probe 3.2 of the dial indicator 3 is in contact with the positioning post 1; the clamping rod of the dial indicator 3 and the positioning sleeve 2 are fixed by the fastening screws 4.

[0018] The positioning pin 1 is sequentially configured along the axial direction as a cap section 1.1, a smooth column section 1.2, a threaded section 1.3, and a reference section 1.4; the diameter of the cap section 1.1 is larger than the diameter of the smooth column section 1.2, the diameter of the smooth column section 1.2 is larger than the diameter of the threaded section 1.3, and the diameter of the threaded section 1.3 is larger than the diameter of the reference section 1.4; the diameter of the smooth column section 1.2 is equal to the inner diameter of the central circular hole 5.1 of the standard parts 5 on both ends of the hole and is a clearance fit.

[0019] The shoulder surfaces of the cap section 1.1 and the light column section 1.2 are set as the first reference surface 1.5.

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

[0021] The central channel of the positioning sleeve 2 is sequentially configured with a threaded hole section 2.1 and a smooth hole section 2.2 along the axial direction; the threaded hole section 2.1 is screwed into 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 clearance-fitted; a through fastening screw mounting hole 2.3 is provided on the smooth hole section 2.2, the fastening screw mounting hole 2.3 is perpendicularly distributed to the central channel of the positioning sleeve 2, and the screw shank of the fastening screw 4 is screwed into the fastening screw mounting 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 at both ends of the hole adopt an open ring structure, and a central circular hole 5.1 is provided at the center of the standard parts 5 at both ends of the hole; one end face of the central circular hole 5.1 is designated as the fourth reference surface 5.2, and the other end face of the central circular hole 5.1 is designated as the fifth reference surface 5.3.

[0024] A method for measuring the distance between the two end faces of a casing-type stator vane hole, using the aforementioned tool for measuring the distance between the two end faces of a casing-type stator vane hole, includes the following steps: Step 1: Select standard parts 5 for both end faces of the holes that match the part 6 to be tested; Step 2: Insert the standard parts 5 at both ends of the hole into the light column section 1.2 of the positioning post 1, so that the first reference surface 1.5 of the positioning post 1 is in contact with the fourth reference surface 5.2 of the standard parts 5 at both ends of the hole; Step 3: Screw the threaded section 1.3 of the positioning pin 1 and the threaded hole section 2.1 of the positioning sleeve 2 together until the fifth reference surface 5.3 of the standard part 5 at both ends of the hole is in contact with the third reference surface 2.4 of the positioning sleeve 2, while ensuring that the positioning sleeve 2 is in a tightened state. Step 4: Insert the clamping rod 3.1 of the dial indicator 3 into the optical hole section 2.2 of the positioning sleeve 2, so that the probe 3.2 of the dial indicator 3 rests against the second reference surface 1.6 of the positioning post 1, while ensuring that the compression of the probe 3.2 is not less than 1mm; Step 5: Tighten the fastening screw 4 so that the screw of the fastening screw 4 is pressed against the clamping sleeve 3.1 of the dial indicator 3, thus completing the fixing of the clamping sleeve 3.1 of the dial indicator 3 to the positioning sleeve 2; Step 6: Rotate the dial of dial indicator 3 until the pointer of dial indicator 3 returns to zero; Step 7: Loosen the threaded connection between the threaded section 1.3 of the positioning pin 1 and the threaded hole section 2.1 of the positioning sleeve 2, and remove the standard parts 5 on both ends of the hole from the positioning pin 1; Step 8: Connect the light column segment 1.2 of the positioning post 1 to the mounting hole of the part to be tested 6, so that the first reference surface 1.5 is in contact with one side end face of the mounting hole of the part to be tested 6; Step 9: Re-screw the threaded section 1.3 of the positioning pin 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 is in contact with 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 is back against the second reference surface 1.6 of the positioning pin 1. Step 10: Read the reading of the pointer of 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 standard part 5. 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 measured 6 can be obtained.

[0025] The solutions in the embodiments are not intended to limit the scope of protection of the present invention. All equivalent implementations or modifications that do not depart from the present invention are included in the scope of protection of the present invention.

Claims

1. A tool for measuring the distance between the two end faces of a stationary vane hole in a casing, characterized in that: The device includes a positioning pin, a positioning sleeve, a dial indicator, fastening screws, and standard parts for both end faces of the hole. The positioning pin and the positioning sleeve are coaxially screwed together. The standard parts for both end faces of the hole are located between the positioning pin and the positioning sleeve. The clamping rod of the dial indicator is inserted into the positioning sleeve, and the probe of the dial indicator is in contact with the top of the positioning pin. The clamping rod of the dial indicator and the positioning sleeve are fixed by fastening screws. The positioning pin is sequentially configured along the axial direction as a cap section, a smooth cylindrical section, a threaded section, and a reference section. The diameter of the cap section is larger than the diameter of the smooth cylindrical section, the diameter of the smooth cylindrical 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 smooth cylindrical section is equal to the inner diameter of the central circular hole of the standard parts for both end faces of the hole and is a clearance fit. The shoulder surfaces of the cap section and the smooth cylindrical section are designated as the first reference surface. The axial end face of the reference section is designated as the second reference surface; the central channel of the positioning sleeve is sequentially configured as a threaded hole section and a smooth hole section along the axial direction; the threaded hole section is screwed into the threaded section of the positioning post; the inner diameter of the smooth hole section is equal to the diameter of the clamping sleeve rod of the dial indicator and is clearance-fitted; a through fastening screw mounting hole is provided on the smooth hole section, the fastening screw mounting hole is perpendicularly distributed to the central channel of the positioning sleeve, and the screw of the fastening screw is screwed into the fastening screw mounting hole; the axial end face of the threaded hole section is designated as the third reference surface; the standard parts of both end faces of the hole adopt an open-hole annular structure, and a central circular hole is provided at the center of the standard parts of both end faces of the hole; one end face of the central circular hole is designated as the fourth reference surface, and the other end face of the central circular hole is designated as the fifth reference surface.

2. A method for measuring the distance between the two end faces of a stationary vane hole in a casing, comprising the tool for measuring the distance between the two end faces of a stationary vane hole in a casing as described in claim 1, characterized in that, Includes the following steps: Step 1: Select standard parts for both end faces of the holes that match the part to be tested; Step 2: Fit the standard parts on both ends of the hole onto the light column section of the positioning post, so that the first reference surface of the positioning post is in contact with the fourth reference surface of the standard parts on both ends of the hole. Step 3: Screw the threaded section of the positioning pin together with the threaded hole section of the positioning sleeve until the fifth reference surface of the standard part at both ends of the hole is in contact with the third reference surface of the positioning sleeve, while ensuring that the positioning sleeve is in a tightened state. Step 4: Insert the clamping rod of the dial indicator into the optical hole section of the positioning sleeve, so that the probe of the dial indicator rests against the second reference surface of the positioning column, while ensuring that the compression of the probe is not less than 1mm. Step 5: Tighten the fastening screws to press the screw threads onto the micrometer's clamping sleeve, thus fixing the micrometer's clamping sleeve to the positioning sleeve. Step Six: Rotate the dial of the dial indicator until the pointer returns to zero; Step 7: Loosen the threaded connection between the threaded section of the positioning pin and the threaded hole section of the positioning sleeve, and remove the standard parts on both ends of the hole from the positioning pin. Step 8: Connect the optical column segment of the positioning post to the mounting hole of the part to be tested, so that the first reference surface is in contact with one end face of the mounting hole of the part to be tested; Step 9: Reconnect the threaded section of the positioning pin to the threaded hole section of the positioning sleeve until the other end face of the mounting hole of the part to be measured is in contact with the third reference surface of the positioning sleeve, while ensuring that the positioning sleeve is in a tightened state. At this time, the probe of the dial indicator is back against the second reference surface of the positioning pin. Step 10: Read the reading of the dial indicator pointer 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. 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 measured can be obtained.

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