Tool for three-coordinate measurement of profile size of double-journal rectification blade

Abstract

The utility model discloses a tool for three-coordinate measurement of the profile size of a double-journal rectification blade, which relates to the field of blade profile measurement and comprises a base, a centering clamping device is arranged on the base, and the central axis of the centering clamping device after centering clamping is perpendicular to the plane where the base is located; a horizontal positioning table is further arranged on the base, a sliding groove is formed in the top of the horizontal positioning table, a sliding block is connected into the sliding groove in a sliding mode, at least two positioning pins are arranged on the sliding block, and when the arrangement positions of all the positioning pins are projected on the same horizontal plane, the positions of the positioning pins cannot be overlapped. The sliding stroke direction of the sliding groove is perpendicular to the central axis of the centering and clamping device after centering and clamping. According to the utility model, the efficiency and precision of three-coordinate measurement of the profile size of the double-journal rectification blade can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of blade profile measurement, in particular to a tool for three-coordinate measurement of double-journal rectifier blade profile dimensions. Background Art

[0002] The double-journal straightening blade has a blade with shafts at both ends. It is a part used to improve airflow and reduce turbulence. It is mainly used in turbomachinery, especially to improve the efficiency and performance of turbomachinery. Therefore, when producing double-journal straightening blades, whether its size meets the design requirements is crucial and is one of the quality control factors in product production.

[0003] In order to facilitate the measurement of the three-coordinate dimensions of the double-neck straightening blade surface, the double-neck straightening blade needs to be clamped; the traditional clamping method is to use the positioning hole with the same axial size as the double-neck straightening blade to vertically position the double-neck straightening blade to achieve Z-direction positioning; then fit the blade with the positioning plate to achieve X-direction positioning of the blade; take the intersection of the X and Z directions as the origin, and define the direction perpendicular to the X and Z directions as the Y direction.

[0004] It can be seen from the traditional clamping method that there must be an assembly gap between the shaft and the locating hole, that is, the double-neck straightening blade cannot guarantee a completely vertical state, and the double-neck straightening blade is easy to tilt, resulting in low measurement accuracy. In order to reduce the inclination size of the double-neck straightening blade, the size of the locating hole is as consistent as possible with the size of the shaft, which makes it difficult for the shaft to be assembled into the locating hole, resulting in low measurement efficiency. In summary, the traditional clamping method in the three-coordinate measurement process has problems such as low measurement efficiency, difficulty in clamping and alignment, and poor measurement accuracy. Especially under the requirements of high-precision and small-size measurements, the traditional clamping method cannot meet production needs.

[0005] Therefore, it is necessary to improve the clamping fixture of the double-neck straightening blade. Utility Model Content

[0006] The purpose of the utility model is to provide a tool for three-coordinate measurement of the surface dimensions of a double-journal straightening blade in response to the above-mentioned problems, which can effectively improve the efficiency and accuracy of the three-coordinate measurement of the surface dimensions of a double-journal straightening blade.

[0007] The technical solution adopted by the utility model is as follows: a tool for three-coordinate measurement of the surface dimensions of a double-journal straightening blade, comprising a base, a centering clamping device is arranged on the base, and the central axis of the centering clamping device after centering and clamping is perpendicular to the surface of the base; a horizontal positioning platform is also arranged on the base, a slide groove is arranged on the top of the horizontal positioning platform, a slider is slidably connected in the slide groove, at least two locating pins are arranged on the slider, and the positions of all the locating pins will not overlap when their arrangement positions are projected on the same horizontal plane, and the sliding stroke direction of the slide groove is perpendicular to the central axis of the centering clamping device after centering and clamping.

[0008] Furthermore, the centering clamping device is a hydraulic tool handle.

[0009] Furthermore, a gasket is placed on the top of the centering clamping device, and the top of the centering clamping device is lower than the top of the slider or the horizontal positioning platform.

[0010] Furthermore, the sliding block is detachably connected to the positioning pin.

[0011] Furthermore, a height positioning mechanism is provided on the base for positioning the height of a reference point of the flow channel on the double-journal straightening blade.

[0012] Furthermore, the height positioning mechanism includes a screw rod fixed on the base, which is arranged vertically and has a sleeve on it. There is a support arm, one end of which is fixedly connected to the sleeve and the other end is provided with a through hole; a nut is threadedly connected to the screw rod, and the nut is located below the sleeve to support the sleeve.

[0013] Furthermore, the positioning pin is slidably connected to the slider and is locked by a locking mechanism.

[0014] Furthermore, a sliding hole is provided on the sliding block, and the positioning pin is inserted into the sliding hole to achieve a sliding connection between the positioning pin and the sliding block.

[0015] Furthermore, the locking mechanism is provided with a screw hole on the slide block, the screw hole passes through the slide hole, and a screw is threadedly connected to the screw hole. When the locking mechanism locks the positioning pin, the screw is pressed tightly against the surface of the positioning pin.

[0016] Furthermore, the positioning pin is provided with a scale along the axial direction.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] 1. The centering clamping device of the utility model clamps the shaft of the double-journal rectifier blade, which is easy to operate and has high stability;

[0019] 2. The utility model determines the Z axis through the centering clamping device, determines the Y axis through the edge line of the slide groove or the edge line of the slider (the sliding stroke direction of the slide groove), translates the Y axis to intersect with the Z axis to find the three-dimensional origin of the measurement, and further determines the X axis. Through the utility model, the flow channel reference point of the double-neck straightening blade can be made coincident with the three-dimensional origin of the measurement, and the assembly angle of the double-neck straightening blade can be positioned by the locating pin against the surface of the double-neck straightening blade; the clamping is simple, the positioning is convenient and accurate, and the efficiency and accuracy of the three-coordinate measurement of the double-neck straightening blade surface size are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0021] Figure 1 It is a schematic diagram of the top view structure of the utility model;

[0022] Figure 2 This is a front view structural schematic diagram of the utility model;

[0023] Figure 3 It is a side view structural schematic diagram of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the utility model having a height positioning mechanism;

[0025] Figure 5 It is a structural schematic diagram of the slidable connection between the positioning pin and the slider;

[0026] Markings in the figure: 1-base; 2-horizontal positioning table; 21-slide groove; 3-slider; 31-slide hole; 32-screw; 4-locating pin; 5-centering clamping device; 6-double-neck straightening blade; 7-washer; 8-standard part; 9-screw; 91-nut; 92-sleeve; 93-support arm; 94-through hole. DETAILED DESCRIPTION

[0027] In the description of this specification, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of this specification is usually placed when used. It is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this specification.

[0028] In addition, if the terms "horizontal" or "vertical" appear in the description of this specification, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this specification, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected" and "connected" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between the internal parts of two elements.

[0030] Example 1

[0031] like Figure 1-Figure 5 As shown, a tool for three-coordinate measurement of the surface dimensions of a double-journal straightening blade comprises a base 1, on which a centering clamping device 5 is provided, and the central axis of the centering clamping device 5 after centering and clamping is perpendicular to the surface of the base 1; the base 1 is also provided with a horizontal positioning platform 2, on the top of which a slide groove 21 is provided, and a slider 3 is slidably connected in the slide groove 21, and at least two locating pins 4 are provided on the slider 3, and when the arrangement positions of all the locating pins 4 are projected on the same horizontal plane, their positions will not overlap, the number of the locating pins 4 is preferably 2, and the two locating pins 4 are on the same horizontal plane, and the sliding stroke direction of the slide groove 21 is perpendicular to the central axis of the centering clamping device 5 after centering and clamping.

[0032] In this embodiment, the process of measuring the profile dimensions by using the tooling and measuring device is as follows:

[0033] S1: Determine the measurement origin using the standard part 8, which is a shaft-like part. The standard part 8 is placed in the centering clamping device 5, and the centering clamping device 5 center-clamps the standard part 8; after clamping, the measuring device scans the standard part 8 to determine the Z axis; specifically, the measuring device selects at least 2 (preferably 3) sections at different positions on the standard part 8, all of which are distributed along the axial direction of the measuring part, and obtains at least 3 outermost points (preferably 3) on each section, and determines the center of the corresponding section according to the outer points, and the centers of all sections jointly determine the Z axis; the measuring device scans the edge of the slide 21 or the edge of the slider 3, and the two edges are even in the travel direction of the slide 21. After the scanning is completed, the scanned line is translated to intersect with the Z axis to determine the Y axis, and then determine the three-dimensional origin of the three-dimensional coordinates of the measuring device; the measuring device further generates an X axis, which intersects the three-dimensional origin and is perpendicular to the Z axis and the Y axis at the same time;

[0034] S2: dismantle the standard part 8, insert the shaft of the double-neck straightening blade 6 into the centering clamping device 5, push the slider 3, make the positioning pin 4 abut against the profile of the double-neck straightening blade 6, determine the installation angle of the double-neck straightening blade 6, at this time, the flow channel reference point of the double-neck straightening blade 6 coincides with the three-dimensional origin, and then use the centering clamping device 5 to lock the double-neck straightening blade 6, and complete the clamping of the double-neck straightening blade 6 by the tooling;

[0035] S3: the slide block 3 is slid, the positioning pin 4 is withdrawn from the profile of the double-journal straightening blade 6, and the measuring device is started to measure the profile size of the double-journal straightening blade 6.

[0036] From the description of the above process, it can be known that the tooling can be used to quickly clamp and position the double-journal straightening blade 6, and accurately position it, effectively improving the efficiency and accuracy of the three-coordinate measurement of the double-journal straightening blade 6 profile size.

[0037] Example 2

[0038] Based on Example 1, a specific implementation method that can be implemented is further proposed.

[0039] A feasible implementation method is that the centering clamping device 5 is a hydraulic tool handle, which is selected as the main body for clamping the double-journal straightening blade 6. The inner diameter of the tool handle is contracted by hydraulic pressure to achieve clamping, which has the advantages of simple operation, high stability and good anti-interference performance.

[0040] Of course, the centering clamping device 5 may also adopt other devices capable of centering clamping, such as a hydraulic chuck, etc.

[0041] A feasible implementation method is that for double-neck straightening blades 6 of different specifications, the height positions of their flow channel reference points are different, so a gasket 7 can be placed on the top of the centering clamping device 5, and the top of the centering clamping device 5 is lower than the top of the slider 3 or the horizontal positioning table 2. The double-neck straightening blade 6 is supported by the gasket 7 to compensate for the position difference between the flow channel reference point and the three-dimensional origin on the Z axis to ensure that the flow channel reference point and the three-dimensional origin coincide with each other.

[0042] A feasible implementation method is that for different double-neck straightening blades 6, the installation angles of their profiles are also different. For this reason, the slider 3 and the positioning pin 4 are detachably connected to achieve replacement of positioning pins 4 of different lengths. In fact, the length difference between the two positioning pins 4 is adjusted to match different installation angles.

[0043] Example 3

[0044] The following implementation method can also be used to adjust the matching of "the position of the flow channel reference point" and "the installation angle of the molding surface" in Example 2.

[0045] For the adjustment of the matching of the "position of the flow channel reference point", a height positioning mechanism can be provided on the base 1 to position the height of the flow channel reference point on the double-journal straightening blade 6; specifically, the height positioning mechanism includes a screw 9 fixed to the base 1, the screw 9 is arranged vertically, and a sleeve 92 is sleeved on the screw 9, and there is a support arm 93, one end of the support arm 93 is fixedly connected to the sleeve 92, and the other end is provided with a through hole 94, and the through hole 94 is for the standard part 8 or the axis of the double-journal straightening blade 6 to pass through; the screw 9 on the screw The threaded connection nut 91 is located below the sleeve 92 to support the sleeve 92; specifically, by adjusting the position of the threaded connection between the nut 91 and the screw 9, the height of the sleeve 92 is adjusted, and then the height of the support arm 93 is adjusted; when the axis of the double-journal straightening blade 6 passes through the through hole 94, the support arm 93 supports the double-journal straightening blade 6 to adjust the height of the flow channel reference point, so as to make up for the position difference between the flow channel reference point and the three-dimensional origin on the Z axis, so as to ensure that the flow channel reference point and the three-dimensional origin coincide. Compared with the method disclosed in Example 2, this method can reduce the preparation of the gasket 7, and can achieve stepless adjustment with higher adjustment accuracy.

[0046] For the adjustment of the matching of the "installation angle of the profile", the positioning pin 4 can be slidably connected with the slider 3 and locked by the locking mechanism, that is, by adjusting the size of each positioning pin 4 sliding out of the slider 3, the size difference between the positioning pins 4 can be adjusted, thereby adjusting the installation angle of the profile. Specifically, the slider 3 is provided with a sliding hole 31, and the positioning pin 4 is inserted into the sliding hole 31 to achieve the sliding connection between the positioning pin 4 and the slider 3; the locking mechanism is provided with a screw 32 hole on the slider 3, the screw 32 hole passes through the sliding hole 31, and the screw 32 hole is threadedly connected with the screw 32 hole. When the locking mechanism locks the positioning pin 4, the screw 32 is pressed against the surface of the positioning pin 4, that is, the positioning pin 4 is locked by the screw 32.

[0047] It should be noted that the length of the positioning pin 4 sliding out of the slider 3 can be determined by measuring with a micrometer. Alternatively, a scale is provided on the positioning pin 4 along the axial direction, and the length of the positioning pin 4 sliding out of the slider 3 can be intuitively obtained through the scale.

[0048] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A tool for three-coordinate measurement of the profile dimensions of a double-journal rectifier blade, characterized in that: The invention comprises a base (1), wherein a centering clamping device (5) is arranged on the base (1), and the center axis of the centering clamping device (5) after centering and clamping is perpendicular to the surface of the base (1); the base (1) is also provided with a horizontal positioning platform (2), the top of the horizontal positioning platform (2) is provided with a slide groove (21), a slider (3) is slidably connected in the slide groove (21), and at least two positioning pins (4) are arranged on the slider (3), and the positions of all the positioning pins (4) do not overlap when projected on the same horizontal plane, and the sliding stroke direction of the slide groove (21) is perpendicular to the center axis of the centering clamping device (5) after centering and clamping.

2. The tooling according to claim 1, characterized in that: The centering clamping device (5) is a hydraulic tool handle.

3. The tooling according to claim 1, characterized in that: A gasket (7) is placed on the top of the centering clamping device (5), and the top of the centering clamping device (5) is lower than the top of the slider (3) or the horizontal positioning platform (2).

4. The tooling according to claim 1, characterized in that: The sliding block (3) is detachably connected to the positioning pin (4).

5. The tooling according to claim 1, characterized in that: The base (1) is provided with a height positioning mechanism for positioning the height of a reference point of a flow channel on the double-journal straightening blade (6).

6. The tooling according to claim 5, characterized in that: The height positioning mechanism comprises a screw rod (9) fixed on the base (1), the screw rod (9) being arranged vertically, and a sleeve (92) being sleeved on the screw rod (9), and a support arm (93) being provided, one end of the support arm (93) being fixedly connected to the sleeve (92), and the other end being provided with a through hole (94); a nut (91) being threadedly connected on the screw rod (9), and the nut (91) being located below the sleeve (92) to support the sleeve (92).

7. The tooling according to claim 1, characterized in that: The positioning pin (4) is slidably connected to the slider (3) and is locked by a locking mechanism.

8. The tooling according to claim 7, characterized in that: The slider (3) is provided with a sliding hole (31), and the positioning pin (4) is inserted into the sliding hole (31) to achieve a sliding connection between the positioning pin (4) and the slider (3).

9. The tooling according to claim 8, characterized in that: The locking mechanism has a screw (32) hole formed on the slide block (3), the screw (32) hole passing through the slide hole (31), and a screw (32) is threadedly connected to the screw (32) hole. When the locking mechanism locks the positioning pin (4), the screw (32) is pressed against the surface of the positioning pin (4).

10. The tooling according to claim 7, characterized in that: The positioning pin (4) is provided with scales along the axial direction.

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