Tool for measuring perpendicularity of housing valve port

Abstract

The utility model provides a kind of tooling for measuring perpendicularity of shell valve port, including expansion sleeve, U-shaped support, dial gauge, support arm, mandrel and measuring rod;Support arm is installed in shell top opening, and middle part has threaded hole;U-shaped support is fixedly connected in support arm one side, and opening is towards support arm and has first mounting hole;The shaft sleeve of dial gauge is inserted in first mounting hole;The inner wall of expansion sleeve is conical inner surface;Mandrel includes thread section and taper section being integrated, and has center hole, mandrel passes through from expansion sleeve inside and is screwed into threaded hole;Taper section has conical outer surface matched with expansion sleeve conical inner surface;Measuring rod is movably arranged in center hole, one end of measuring rod is in contact with the measuring head of dial gauge, the other end extends out of center hole and is connected with measuring head.The utility model is cooperated by the expansion sleeve and mandrel designed, so that the expansion sleeve can be stably fixed in the bore of shell, without interference with the sidewall of the bore of shell, and greatly improves the efficiency and accuracy of measurement.

Description

Technical Field

[0001] This utility model belongs to the field of aircraft parts measurement technology, specifically relating to a tooling for measuring the verticality of a housing valve port. Background Technology

[0002] During the repair of aircraft control valves, the verticality of the valve housing orifice needs to be checked. Currently, a dial indicator and an extended measuring rod are used for verticality checks. However, because the housing is a cylindrical structure with a height of 66mm, and the orifice is a trapezoidal annular structure located at the bottom of the housing's inner bore with a top width of only 0.5mm, the extended measuring rod is prone to interference with the housing's bore wall during use, and its contact with the orifice is unreliable. Multiple adjustments to the measuring point are required during measurement, which is difficult, prone to errors, and time-consuming, affecting product repair efficiency and product quality. Utility Model Content

[0003] The purpose of this invention is to solve the problems of difficulty, large error, and time-consuming measurement of the valve port of the housing by traditional tooling in the existing technology, and to provide a tooling for measuring the verticality of the valve port of the housing.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A fixture for measuring the perpendicularity of a valve port on a housing is provided. The housing is a cylindrical housing with openings at both ends. The valve port is located at the opening at the bottom of the inner bore of the cylindrical housing. The fixture for measuring the perpendicularity of the valve port includes an expansion sleeve, a U-shaped bracket, a dial indicator, a support arm, a mandrel, and a measuring rod. The support arm is installed at the top of the inner bore of the housing to be measured and has a threaded hole in the middle. The first end of the expansion sleeve is fixedly connected to the side of the support arm near the valve port. The inner wall of the support arm is a tapered inner surface that gradually widens from the first end to the second end, and the side wall of the support arm has multiple slits extending from the first end to the second end. The U-shaped bracket is fixedly connected to the side of the support arm away from the valve port, with its opening facing the support arm. The U-shaped bracket includes a base. The arm and connecting arms are vertically connected to both ends of the bottom arm. The U-shaped bracket is connected to the support arm through two connecting arms. The bottom arm of the U-shaped bracket has a first mounting hole. The bushing of the dial indicator is inserted into the first mounting hole. The mandrel includes a threaded section and a tapered section that are integrated together. The threaded section and the tapered section have a central hole along the axial direction. The mandrel passes through the inside of the expansion sleeve, and the threaded section is screwed into the threaded hole. The tapered section has a tapered outer surface that matches the tapered inner surface of the expansion sleeve. The measuring rod is movably set in the central hole. The end of the measuring rod near the dial indicator contacts the measuring head of the dial indicator, and the end near the valve port extends out of the central hole and is connected to a measuring head. The measuring head is perpendicular to the axis of the inner hole and is used to measure the perpendicularity of the valve port.

[0006] Furthermore, a compression spring is fitted on the outer wall of the end of the measuring rod near the dial indicator; a first protrusion is provided on the end of the center hole near the dial indicator to move the compression spring toward the measuring head; and a second protrusion is provided on the outer wall of the end of the measuring rod near the valve port to move the compression spring toward the measuring head of the dial indicator.

[0007] Furthermore, the end of the measuring head near the second protrusion has two inclined surfaces that intersect at a line perpendicular to the axis of the measuring rod.

[0008] Furthermore, four gaps are evenly distributed along the circumference of the expansion sleeve.

[0009] Furthermore, the upper end of the measuring rod is provided with a first handle for rotating the measuring rod to make the measuring head contact different positions on the valve port surface.

[0010] Furthermore, the upper end of the measuring rod is provided with a second mounting hole perpendicular to the axis of the measuring rod, the center of the first handle is provided with a third mounting hole along its radial direction, and a circular hole for mounting the upper end of the measuring rod is provided in the axial direction perpendicular to the third mounting hole. The circular hole of the first handle is fitted onto the upper end of the measuring rod, and the second mounting hole and the third mounting hole are located on the same axis and fixed by a cylindrical pin.

[0011] Furthermore, a second handle is provided at the upper end of the mandrel, which is used to adjust the relative position of the mandrel and the expansion sleeve so that the expansion sleeve expands and fixes the outer wall of the expansion sleeve in the inner hole of the housing to be tested.

[0012] Furthermore, the second handle is cylindrical and is vertically mounted on the spindle via a slotted conical set screw.

[0013] Furthermore, the intersection of the two inclined surfaces of the measuring head is rounded.

[0014] Furthermore, the dial indicator's probe passes through the first mounting hole and contacts the upper end of the measuring rod. The U-shaped bracket has a threaded mounting hole that communicates with the first mounting hole and is perpendicular to the axial direction. A retaining ring is fitted on the outer side of the dial indicator's bushing. The retaining ring is pressed into the threaded mounting hole by screws to fix the dial indicator.

[0015] The advantages of this utility model are:

[0016] The tooling designed in this utility model uses a designed expansion sleeve and a mandrel to cooperate with each other, so that the expansion sleeve can be stably fixed in the inner hole of the housing to determine the measurement benchmark. The measuring rod moves up and down in the center hole of the mandrel without shaking or interfering with the side wall of the inner hole of the housing, and makes reliable contact with the valve port. Only one measurement is needed, which improves the measurement efficiency by 3 times, greatly improves the efficiency and accuracy of measurement, and ensures the production progress. Attached Figure Description

[0017] The features and advantages of this invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0018] Figure 1 This is a schematic diagram of the casing of this utility model;

[0019] Figure 2 This is a schematic diagram of the tooling of this utility model;

[0020] Figure 3 This is a schematic diagram showing the installation position of the screw in this utility model;

[0021] Figure 4 This is a front view of the measuring rod of this utility model;

[0022] Figure 5 This is a side view of the measuring rod of this utility model;

[0023] Figure 6 This is a schematic diagram of the mandrel structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the expansion sleeve structure of this utility model;

[0025] Figure 8 This is a top view of the expansion sleeve of this utility model;

[0026] Figure 9 This is a top view of the first handle of this utility model;

[0027] Figure 10 This is a top view of the second handle of this utility model;

[0028] Figure 11 This is the front view of the bracket of this utility model;

[0029] Figure 12 This is a top view of the bracket of this utility model;

[0030] In the diagram: 1-Screw; 2-Measuring rod; 21-Measuring head; 22-Second protrusion; 23-Second mounting hole; 3-Mandrel; 31-Conical section; 32-Threaded section; 33-First protrusion; 34-Compression spring; 4-Support arm; 41-Threaded hole; 5-Second handle; 51-Slotted conical set screw; 6-First handle; 61-Cylindrical pin; 7-U-shaped bracket; 71-First mounting hole; 72-Plug; 73-Fixing pin; 8-Snap ring; 9-Expansion sleeve; 91-Gap. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0032] like Figure 1 As shown, the housing is a cylindrical housing with openings at both ends, and the valve port is located at the opening at the bottom of the inner hole of the cylindrical housing. The valve port has a trapezoidal structure.

[0033] like Figure 2 As shown, this embodiment provides a tooling for measuring the verticality of a valve housing port. The tooling includes an expansion sleeve 9, a U-shaped bracket 7, a dial indicator, a support arm 4, a mandrel 3, and a measuring rod 2. Figure 7 As shown, in this embodiment, the support arm 4 and the expansion sleeve 9 are designed as a single unit. In other embodiments, the support arm 4 and the expansion sleeve 9 may also be separate structures.

[0034] like Figure 2 As shown, the support arm 4 is installed on the top of the inner hole of the housing being tested, and has a threaded hole 41 in the middle.

[0035] like Figure 2 As shown, the first end of the expansion sleeve 9 is fixedly connected to the side of the support arm 4 near the valve port. The inner wall of the expansion sleeve 9 is a tapered inner surface that gradually widens from the first end to the second end, and the side wall of the expansion sleeve 9 has multiple slits 91 extending from the first end to the second end, so as to... Figure 2 As shown in the diagram, the first end and the second end of the expansion sleeve 9 are the upper and lower ends, respectively. The conical inner surface of the expansion sleeve 9 is a 6° to 15° conical surface, and the expansion sleeve 9 has the function of fixing and positioning.

[0036] like Figure 2 As shown, the U-shaped bracket 7 is fixedly connected to the side of the support arm 4 away from the valve port by a screw plug 72 and a fixing pin 73, that is... Figure 2 The upper side of the U-shaped bracket 7, with the opening facing the support arm 4, such as Figure 11 , 12 As shown, the U-shaped bracket 7 includes a base arm and connecting arms vertically connected to both ends of the base arm. The U-shaped bracket 7 is connected to the support arm 4 through the two connecting arms. The base arm of the U-shaped bracket has a first mounting hole 71; as shown... Figure 2 As shown, the dial indicator's bushing is inserted into the first mounting hole 71.

[0037] like Figure 2 , 6As shown, the mandrel 3 includes a threaded section 32 and a tapered section 31 integrally connected. The threaded section 32 and the tapered section 31 have a central hole along the axial direction. The mandrel 3 passes through the inside of the expansion sleeve 9, and the threaded section 32 is screwed into the threaded hole 41. The tapered section 31 has a tapered outer surface that matches the tapered inner surface of the expansion sleeve 9. In this embodiment, the tapered outer surface of the mandrel 3 is a 6° to 15° tapered surface, consistent with the expansion sleeve 9, so that the expansion sleeve 9 can expand and be fixed in the inner hole of the housing.

[0038] like Figure 2 As shown, the measuring rod 2 is movably disposed within the central hole. The end of the measuring rod 2 near the dial indicator contacts the probe of the dial indicator, while the end near the valve port extends out of the central hole and is connected to the measuring head 21. In this embodiment, the measuring rod 2 is made of H62 material to avoid damage to the valve port caused by measurement.

[0039] The tooling designed in this embodiment is used to measure the perpendicularity of the valve port. The tapered inner surface of the expansion sleeve 9 and the tapered outer surface of the mandrel 3 are designed to cooperate, allowing the movement of the mandrel 3 to expand the expansion sleeve 9. This ensures that the expansion sleeve 9 and mandrel 3 are stably fixed within the inner hole of the housing without wobbling. The measuring rod 2 is movably positioned in the central hole, and the contact between the measuring rod 2 and the valve port is also stable, preventing any unreliable contact. During installation, it is ensured that the axes of the dial indicator, measuring rod 2, expansion sleeve 9, and mandrel 3 are all on the same axis. Only one measurement is required, increasing measurement efficiency by three times, significantly improving measurement efficiency and accuracy, and ensuring production progress.

[0040] like Figure 2 , 4 As shown, a compression spring 34 is fitted onto the outer wall of the end of the measuring rod 2 closest to the dial indicator; a first protrusion 33 is provided at the end of the center hole closest to the dial indicator, causing the compression spring 34 to move towards the measuring head 21; a second protrusion 22 is provided on the outer wall of the end of the measuring rod 2 closest to the valve port, causing the compression spring 34 to move towards the measuring head of the dial indicator. The compression spring 34 is mounted on the measuring rod 2, and its upper end moves downward through the first protrusion 33. The tension after compression allows the measuring head 21 of the measuring rod 2 to make closer contact with the valve port, resulting in more accurate measurements.

[0041] like Figure 4 , 5 As shown, the measuring head 21 has two inclined surfaces at one end near the second protrusion 22, and the two inclined surfaces intersect at a line perpendicular to the axis of the measuring rod 2.

[0042] like Figure 7 , 8 As shown, there are four gaps 91 evenly distributed around the expansion sleeve 9, and the width of the gaps 91 is 1-2 mm.

[0043] like Figure 2As shown, the upper end of the measuring rod 2 extends out of the spindle 3 and is provided with a first handle 6, which is used to rotate the measuring rod 2 so that the measuring head 21 contacts different positions on the valve port surface.

[0044] like Figure 2 , 5 As shown in Figure 9, the upper end of the measuring rod 2 is provided with a second mounting hole 23 perpendicular to the axis of the measuring rod 2, and the center of the first handle 6 is provided with a third mounting hole along its radial direction. A circular hole for mounting the upper end of the measuring rod 2 is provided in the direction perpendicular to the axis of the third mounting hole. The circular hole of the first handle 6 is fitted onto the upper end of the measuring rod 2, and the second mounting hole 23 and the third mounting hole are located on the same axis. The second mounting hole 23 and the third mounting hole are fixed by inserting a cylindrical pin 61 into the second mounting hole 23 and the third mounting hole.

[0045] like Figure 2 As shown, the threaded section 32 at the upper end of the mandrel 3 is screwed into the threaded hole 41 and extends out of the threaded hole 41, and a second handle 5 is provided for adjusting the relative position of the mandrel 3 and the expansion sleeve 9 so that the expansion sleeve 9 expands.

[0046] like Figure 2 , 10 As shown, the second handle 5 is a cylinder, which is vertically mounted on the mandrel 3 by a slotted conical set screw 51. The second handle 5 facilitates the rotation of the mandrel 3.

[0047] like Figure 4 As shown, the intersection of the two inclined surfaces of the measuring head 21 is rounded, specifically with a radius of 0.5.

[0048] like Figure 2 , 3 As shown, the probe of the dial indicator passes through the first mounting hole 71 and contacts the upper end of the measuring rod 2. The U-shaped bracket 7 is provided with a threaded mounting hole that communicates with the first mounting hole 71 and is perpendicular to the axial direction. The bushing of the dial indicator is fitted with a retaining spring 8. The retaining spring 8 is installed in the first mounting hole 71 of the U-shaped bracket 7. It is screwed into the threaded mounting hole by a screw 1 until the bottom end of the screw 1 presses against the retaining spring 8 in the first mounting hole 71. The retaining spring 8 makes the dial indicator more securely installed.

[0049] The fixture for measuring the verticality of the valve port is fixed in the inner hole of the housing to be measured, with the axis of the inner hole as the reference, and is used to measure the verticality of the valve port.

[0050] The tooling designed in this example is used as follows:

[0051] First, install the assembly of the expansion sleeve 9, mandrel 3, and measuring rod 2 into the inner hole of the housing. The threaded section 32 on the mandrel 3 is threadedly engaged with the threaded hole on the support arm 4. Hold the second handle 5 and rotate the mandrel 3, causing the mandrel 3 to move upward under the action of the threaded engagement, thereby expanding the expansion sleeve 9 to fix it in the inner hole of the housing, thus completing the positioning of the measurement reference. Then, install the dial indicator on the U-shaped bracket 7, with the dial indicator's probe contacting the top of the measuring rod 2 and the measuring head 21 at the bottom of the measuring rod 2 contacting the valve port. Hold the first handle 6 and rotate the measuring rod 2 360°, reading the dial indicator value during the rotation process and recording the maximum and minimum values. This completes the measurement of the valve port's verticality.

[0052] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. A tooling for measuring the perpendicularity of a valve port on a housing, wherein the housing is a cylindrical housing with openings at both ends, and the valve port is located at the opening at the bottom of the inner bore of the cylindrical housing, characterized in that, include: Support arm (4) is installed on the top of the inner hole of the housing to be tested, and has a threaded hole (41) in the middle. The expansion sleeve (9) has its first end fixedly connected to the side of the support arm (4) near the valve port. The inner wall of the expansion sleeve (9) is a tapered inner surface that gradually expands from the first end to the second end, and the side wall of the expansion sleeve (9) has multiple slits (91) extending from the first end to the second end. U-shaped bracket (7) is fixedly connected to the side of the support arm (4) away from the valve port, and the opening faces the support arm (4). The U-shaped bracket (7) includes a bottom arm and connecting arms vertically connected to both ends of the bottom arm. The U-shaped bracket (7) is connected to the support arm (4) through two connecting arms. The bottom arm of the U-shaped bracket (7) has a first mounting hole (71). A dial indicator, with its bushing inserted into the first mounting hole (71). The mandrel (3) includes a threaded section (32) and a tapered section (31) integrally connected, the threaded section (32) and the tapered section (31) having a central hole along the axial direction, the mandrel (3) passing through the inside of the expansion sleeve (9), and the threaded section (32) being screwed into the threaded hole (41); the tapered section (31) has a tapered outer surface that matches the tapered inner surface of the expansion sleeve (9); And a measuring rod (2), which is movably set in the central hole. The end of the measuring rod (2) near the dial indicator is in contact with the measuring head of the dial indicator, and the end near the valve port extends out of the central hole and is connected to a measuring head (21). The measuring head (21) is perpendicular to the axis of the inner hole and is used to measure the perpendicularity of the valve port.

2. The tooling for measuring the perpendicularity of the valve port of a housing according to claim 1, characterized in that, A compression spring (34) is fitted on the outer wall of the end of the measuring rod (2) near the dial indicator. The center hole is provided with a first protrusion (33) at one end near the dial indicator, which causes the compression spring (34) to move toward the measuring head (21). The outer wall of the probe (2) near the valve port is provided with a second protrusion (22) that moves the compression spring (34) toward the probe of the dial indicator.

3. The tooling for measuring the perpendicularity of the valve port of a housing according to claim 2, characterized in that, The measuring head (21) has two inclined surfaces at one end near the second protrusion (22), and the two inclined surfaces intersect at a line perpendicular to the axis of the measuring rod (2).

4. The tooling for measuring the perpendicularity of the valve port of a housing according to claim 1, characterized in that, The gap (91) is provided in four evenly spaced circumferentially along the expansion sleeve (9).

5. The tooling for measuring the perpendicularity of the valve port of a housing according to claim 4, characterized in that, The upper end of the measuring rod (2) is provided with a first handle (6) for rotating the measuring rod (2) so that the measuring head (21) contacts different positions on the valve port surface.

6. The tooling for measuring the perpendicularity of the valve port of a housing according to claim 5, characterized in that, The upper end of the measuring rod (2) is provided with a second mounting hole (23) perpendicular to the axis of the measuring rod (2). The center of the first handle (6) is provided with a third mounting hole along its radial direction. A circular hole for mounting the upper end of the measuring rod (2) is provided in the direction perpendicular to the axis of the third mounting hole. The circular hole of the first handle (6) is sleeved on the upper end of the measuring rod (2), and the second mounting hole (23) and the third mounting hole are located on the same axis and fixed by a cylindrical pin (61).

7. The tooling for measuring the perpendicularity of a valve housing according to claim 1, characterized in that, The upper end of the mandrel (3) is provided with a second handle (5) for adjusting the relative position of the mandrel (3) and the expansion sleeve (9) so that the expansion sleeve (9) expands and the outer wall of the expansion sleeve (9) is fixed in the inner hole of the housing to be tested.

8. The tooling for measuring the perpendicularity of the valve port of a housing according to claim 7, characterized in that, The second handle (5) is a cylinder and is vertically mounted on the spindle (3) by a slotted conical set screw (51).

9. The tooling for measuring the perpendicularity of the valve port of a housing according to claim 3, characterized in that, The two inclined surfaces of the measuring head (21) are rounded at the intersection.

10. The tooling for measuring the perpendicularity of a valve housing according to claim 1, characterized in that, The probe of the dial indicator passes through the first mounting hole (71) and contacts the upper end of the measuring rod (2). The U-shaped bracket (7) is provided with a threaded mounting hole that communicates with the first mounting hole (71) and is perpendicular to the axial direction. A retaining ring (8) is sleeved on the outside of the bushing of the dial indicator. The retaining ring (8) is pressed into the threaded mounting hole by a screw (1) to fix the dial indicator.

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