Radius detection device

Abstract

The invention relates to a radius detection device which comprises a shell, a measuring assembly, an illumination assembly and an observation assembly. The measuring assembly comprises a detection piece, the detection piece is provided with a curved surface feature matched with the theoretical contour of a workpiece to be measured, and the detection piece is telescopically arranged at the front end of the shell; the illumination assembly comprises a direction-adjustable light source and is used for illuminating the contact area of the detection piece and the to-be-measured workpiece; the observation assembly is movably connected with the shell and is configured to transmit light of the contact area of the detection piece and the workpiece to be measured to the observation interface. During measurement, the detection piece is stretched out and drawn back relative to the shell, so that the detection piece makes contact with the interior of an annular groove or an arc groove of a to-be-measured workpiece, an adjustable light source of the illumination assembly irradiates the contact area of the detection piece and the to-be-measured workpiece, and the light transmission condition is observed through cooperation of the illumination assembly and the observation assembly. The device can be suitable for detecting the radius of the arc groove or the annular groove of a blade of a complex structure, and is convenient to operate and high in adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and particularly to a radius detection device. Background Art

[0002] In the mechanical design and machining industries of large cast iron and steel components, arc grooves or annular grooves are common machining features, especially widely applied in rotating workpieces such as steam and gas turbine guide vane retaining rings. The radius dimensional accuracy requirements for such arc grooves or annular grooves are extremely strict, much higher than the tolerance requirements of current industry specifications, and they are usually designed at the root of the blade groove, with complex structures and far from the open end face, making their radius detection difficult. The currently common detection method is to place an R gauge on the arc groove or annular groove to be measured for comparison and estimation to obtain the measurement value. However, since the detection of the traditional R gauge has requirements for the operating space, otherwise the detection results will be deviated, and it is difficult to accurately detect the radius of the arc groove or annular groove of the blade. Summary of the Invention

[0003] Based on this, in view of the problem that it is difficult to accurately detect the radius of the arc groove or annular groove of the blade, it is necessary to provide a radius detection device that is easy to operate and has accurate detection.

[0004] A radius detection device provided by the present invention includes:

[0005] A housing;

[0006] A measuring component, including a detecting piece, the detecting piece is provided with a curved surface feature matching the theoretical contour of the workpiece to be measured, and the detecting piece is telescopically arranged at the front end of the housing;

[0007] A lighting component, including an adjustable light source, for illuminating the contact area between the detecting piece and the workpiece to be measured;

[0008] An observing component, movably connected to the housing, and the observing component is configured to conduct the light of the contact area between the detecting piece and the workpiece to be measured to an observation interface.

[0009] In one embodiment, the adjustable light source includes a lamp tube and a power supply control unit connected to each other.

[0010] In one embodiment, the power supply control unit includes a battery, a loading and unloading piece, and a switch. The battery is arranged in the housing, the loading and unloading piece is detachably connected to the housing, and the switch is arranged on the outer side surface of the housing.

[0011] In one embodiment, the observation component includes a light transmission layer, a light reflection layer, and an observation interface arranged in sequence. The light transmission layer and the light reflection layer are sequentially arranged at one end of the housing close to the detection piece, and the observation interface is arranged at one end of the housing far from the detection piece.

[0012] In one embodiment, the observation component further includes an observation chamber. The light transmission layer is a light-transmitting mirror, the light reflection layer is a reflecting mirror, and the observation interface is a concave mirror. The concave mirror is arranged at the top of the observation chamber, the reflecting mirror is obliquely arranged at the bottom of the observation chamber, and the reflecting mirror is arranged on one side of the observation chamber close to the detection piece.

[0013] In one embodiment, the housing includes a main body and a first connection portion. The measurement component is arranged in the middle of the main body, the illumination component is arranged on one side of the main body, the first connection portion is arranged on the side of the main body far from the illumination component, and the observation component further includes a second connection portion. The second connection portion is slidably connected to the first connection portion.

[0014] In one embodiment, the first connection portion is provided with a chute, and the second connection portion is provided with a protrusion. The protrusion is slidably connected to the chute.

[0015] In one embodiment, the detection piece is detachably connected to the housing.

[0016] For the above radius detection device, the detection piece of the measurement component has a curved surface feature matching the theoretical contour of the measured annular groove. During measurement, the detection piece is telescoped relative to the housing so that the detection piece contacts the inside of the annular groove or arc groove of the workpiece to be measured, and the adjustable light source of the illumination component is used to irradiate the contact area between the detection piece and the workpiece to be measured. When there is no deviation or the deviation value is very small and within an acceptable range between the curved surface of the detection piece and the actual contour of the arc groove or annular groove of the workpiece to be measured, no abnormal light transmission phenomenon can be observed through the observation component; when there is a deviation between the curved surface of the detection piece and the actual contour of the arc groove or annular groove of the workpiece to be measured, an abnormal light transmission phenomenon can be observed through the observation component at the top position or the bottom position of the arc groove or annular groove. Then, further measurement can be carried out by replacing the detection piece of other specifications to determine the radius value of the measured arc groove or annular groove. This radius detection device can adapt to the detection of the radius of the arc groove or annular groove of a blade with a complex structure. The detection piece can be flexibly telescoped, saving operation space. By cooperating with the illumination component and the observation component to observe the light transmission situation, the radius of the measured arc groove or annular groove can be accurately determined, with convenient operation, accurate measurement, and strong adaptability. Description of the Drawings

[0017] Figure 1Schematic diagram of a radius detection device in an embodiment;

[0018] Figure 2 Overall structure diagram of a radius detection device in an embodiment;

[0019] Figure 3 Cross-sectional view of a radius detection device in an embodiment;

[0020] Figure 4 Cross-sectional view of a radius detection device with observation line of sight indication in an embodiment;

[0021] Figure 5 Of a radius detection device in an embodiment;

[0022] Figure 6 Of a radius detection device in an embodiment;

[0023] Figure 7 Of a radius detection device in an embodiment;

[0024] Figure 8 Of a radius detection device in an embodiment;

[0025] Figure 9 Of a radius detection device in an embodiment;

[0026] Figure 10 Of a radius detection device in an embodiment;

[0027] Figure 11 Of a radius detection device in an embodiment;

[0028] Figure 12 Of a radius detection device in an embodiment;

[0029] Figure 13 Of a radius detection device in an embodiment;

[0030] Figure 14 Of a radius detection device in an embodiment;

[0031] Figure 15 Of a radius detection device in an embodiment.

[0032] Label description:

[0033] 100, radius detection device; A, workpiece to be measured;

[0034] 1, housing; 2, measurement component; 3, lighting component; 4, observation component;

[0035] 11, main body; 12, first connection part;

[0036] 21. Detection piece; 22. Measuring support; 23. Measuring adjustment piece; 24. Elastic piece;

[0037] 31. Lamp tube; 32. Battery; 33. Loading and unloading piece; 34. Switch;

[0038] 41. Second connecting part; 42. Observation chamber; 43. Reflecting mirror; 44. Translucent mirror; 45. Concave mirror. Specific implementation manners

[0039] To make the above objects, features and advantages of the present invention more obvious and understandable, the specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0045] Referring to Figures 1-4 , a radius detection device provided in an embodiment of the present invention includes: a housing, a measurement assembly, a lighting assembly and an observation assembly. Among them, the measurement assembly includes a detection member, and the detection member is provided with a curved surface feature that matches the theoretical contour of the workpiece to be measured. The detection member is telescopically disposed at the front end of the housing; the lighting assembly includes an adjustable light source for illuminating the contact area between the detection member and the workpiece to be measured; the observation assembly is movably connected to the housing, and the observation assembly is configured to conduct the light in the contact area between the detection member and the workpiece to be measured to an observation interface. In this radius detection device, the detection member of the measurement assembly has a curved surface feature that matches the theoretical contour of the measured annular groove. As Figures 11-15As shown, during measurement, the detection piece is telescoped relative to the housing so that the detection piece contacts the inside of the annular groove or arc groove of the workpiece to be measured, and the adjustable light source of the light illumination component is used to irradiate the contact area between the detection piece and the workpiece to be measured. When there is no deviation or the deviation value is very small and within an acceptable range between the curved surface of the detection piece and the actual contour of the arc groove or annular groove of the workpiece to be measured, no abnormal light transmission phenomenon can be observed through the observation component; when there is a deviation between the curved surface of the detection piece and the actual contour of the arc groove or annular groove of the workpiece to be measured, an abnormal light transmission phenomenon can be observed through the observation component at the top position or the bottom position of the arc groove or annular groove. Then, further measurement can be carried out by replacing the detection piece of other specifications to determine the radius value of the measured arc groove or annular groove. This radius detection device can adapt to the detection of the radius of the arc groove or annular groove of the blade with a complex structure. The detection piece can be flexibly telescoped, saving operation space. By cooperating with the light illumination component and the observation component to observe the light transmission situation, the radius of the measured arc groove or annular groove can be accurately determined, with convenient operation, accurate measurement, and strong adaptability.

[0046] As Figures 1-6 shown, in order to improve the accuracy of the measurement results, in one embodiment, the adjustable light source includes a lamp tube and a power supply control unit connected to each other. The contact area between the detection piece and the workpiece to be measured is irradiated by the lamp tube, and the power supply control unit controls the light and ensures the output light source brightness for easy and accurate observation. Optionally, the lamp tube is a flexible lamp tube, and the flexible lamp tube can be bent to any angle to adapt to different detection angle requirements, adapt to complex and limited detection spaces, reduce external influences, and make the measurement results accurate and reliable.

[0047] Optionally, in one embodiment, the power supply control unit includes a battery, a loading and unloading piece, and a switch. The battery is arranged inside the housing, the loading and unloading piece is detachably connected to the housing, and the switch is arranged on the outer side surface of the housing for easy operation and control of the light source on and off. The battery can be quickly disassembled through the loading and unloading piece for replacement. Optionally, the loading and unloading piece is a screw or a clamping piece containing a buckle.

[0048] As Figures 2-4 、 Figure 7 、 Figure 8 shown, in one embodiment, the observation component includes a light transmission layer, a light reflection layer, and an observation interface arranged in sequence. The light transmission layer and the light reflection layer are sequentially arranged at one end of the housing close to the detection piece, and the observation interface is arranged at one end of the housing far from the detection piece. During measurement and observation, light penetrates the light transmission layer from the contact area between the detection piece and the workpiece to be measured, is reflected by the light reflection layer to the observation interface to form an image, and the operator directly observes the light transmission phenomenon through the observation interface.

[0049] For ease of observation, while simplifying the structure and saving space, in one of the embodiments, the observation component further includes an observation chamber, the light transmission layer is a transparent mirror, the light reflection layer is a reflecting mirror, and the observation interface is a concave mirror; the concave mirror is disposed at the top of the observation chamber, the reflecting mirror is inclined and disposed at the bottom of the observation chamber, and the reflecting mirror is disposed on one side of the observation chamber close to the detection member. Such a layout saves space and shortens the optical path through two reflections, improving the imaging clarity. During measurement and observation, light penetrates the transparent mirror from the contact area, is reflected by the reflecting mirror to the concave mirror to form a magnified image, and the operator directly observes the light transmission phenomenon through the concave mirror. In addition, by designing the observation chamber, the cleanliness of each optical element can be ensured during long-term use, reducing the maintenance frequency.

[0050] In one of the embodiments, the housing includes a main body and a first connecting portion. The measurement component is disposed in the middle of the main body, the illumination component is disposed on one side of the main body, the first connecting portion is disposed on the side of the main body away from the illumination component, and the observation component further includes a second connecting portion. The second connecting portion is slidably connected to the first connecting portion. The separation design of the observation component from the housing main body is realized through the sliding connection and can be flexibly telescoped, so as to accurately align the light transmission layer of the observation component with the contact area between the detection member and the workpiece to be measured. At the same time, it can adapt to workpieces to be measured of different sizes, expanding the detection range. By disposing the illumination component on one side of the main body and the first connecting portion on the side of the main body away from the illumination component, the spatial layout is optimized, making the overall structure of the radius measuring device compact and convenient for operation.

[0051] Optionally, in one of the embodiments, the first connecting portion is provided with a sliding groove, and the second connecting portion is provided with a protruding portion. The protruding portion is slidably connected to the sliding groove to realize the sliding connection between the observation component and the housing main body. Optionally, the sliding groove is a rectangular sliding groove or a T-shaped sliding groove, and the shape of the protruding portion matches that of the sliding groove.

[0052] As Figures 1-4 、 Figures 9-15 shown, in one of the embodiments, the measurement component further includes a measurement support column, a measurement adjusting member, and an elastic member. The measurement support column is disposed in the main body of the housing. The measurement support column is detachably connected to the detection member. The elastic member is sleeved on the measurement support column and abuts against the measurement adjusting member and one end of the housing main body close to the detection member. The measurement adjusting member is movably connected to the housing main body. The extending length of the detection member can be accurately controlled through the measurement adjusting member, and the pressure can be controlled when the detection member contacts the measured annular groove or arc groove through the elastic member, adapting to groove bodies of different sizes and being able to reset after the measurement is completed.

[0053] In one embodiment, the detection component is detachably connected to the outer shell. When abnormal light transmission occurs during measurement, different specifications of detection components can be flexibly replaced until no abnormal light transmission is observed, that is, the dimensions of the arc groove or annular groove are accurately measured.

[0054] Optionally, the measurement adjustment component is a screw, which is threadedly connected to the main body of the outer shell.

[0055] Optionally, the detection component is connected to the measurement support pillar through a threaded interface, and a lock washer is provided at the interface; or the connection between the detection component and the measurement support pillar is a snap connection. Optionally, there are multiple specifications of detection components, which are selected according to the specifications and tolerance requirements of the measured annular groove or arc groove.

[0056] In the above radius detection device, the detection component of the measurement assembly has a curved surface feature that matches the theoretical contour of the measured annular groove. During measurement, the detection component is telescoped relative to the outer shell so that the detection component contacts the inner part of the annular groove or arc groove of the workpiece to be measured, and the adjustable light source of the light illumination assembly is used to irradiate the contact area between the detection component and the workpiece to be measured. When there is no deviation or the deviation value is very small and within an acceptable range between the curved surface of the detection component and the actual contour of the arc groove or annular groove of the workpiece to be measured, no abnormal light transmission phenomenon can be observed through the observation assembly; when there is a deviation between the curved surface of the detection component and the actual contour of the arc groove or annular groove of the workpiece to be measured, abnormal light transmission phenomenon can be observed through the observation assembly at the top or bottom position of the arc groove or annular groove. Then, further measurement can be carried out by replacing other specifications of detection components to determine the radius value of the measured arc groove or annular groove. This radius detection device can adapt to the detection of the radius of the arc groove or annular groove of blades with complex structures. The detection component can be flexibly telescoped, saving operation space. By cooperating the light illumination assembly and the observation assembly to observe the light transmission situation, the radius of the measured arc groove or annular groove can be accurately measured, with convenient operation, accurate measurement, and strong adaptability.

[0057] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0058] The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A radius detection device, characterized in that, The described radius detection device includes: A housing; A measurement component, including a detection piece, the detection piece is provided with a curved surface feature matching the theoretical contour of the workpiece to be measured, and the detection piece is telescopically arranged at the front end of the housing; A lighting component, including an adjustable light source, for illuminating the contact area between the detection piece and the workpiece to be measured; An observation component, movably connected to the housing, and the observation component is configured to conduct the light in the contact area between the detection piece and the workpiece to be measured to an observation interface.

2. The radius detection device according to claim 1, characterized in that, The adjustable light source includes a lamp tube and a power supply control unit connected to each other.

3. The radius detection device according to claim 2, wherein The power supply control unit includes a battery, a loading and unloading piece, and a switch. The battery is arranged inside the housing, the loading and unloading piece is detachably connected to the housing, and the switch is arranged on the outer side surface of the housing.

4. The radius detection device according to claim 1, characterized in that, The observation component includes a light transmission layer, a light reflection layer, and an observation interface arranged in sequence. The light transmission layer and the light reflection layer are sequentially arranged at one end of the housing close to the detection piece, and the observation interface is arranged at one end of the housing far from the detection piece.

5. The radius detection device according to claim 4, characterized in that The observation component further includes an observation chamber. The light transmission layer is a light-transmitting mirror, the light reflection layer is a reflecting mirror, and the observation interface is a concave mirror; the concave mirror is arranged at the top of the observation chamber, the reflecting mirror is obliquely arranged at the bottom of the observation chamber, and the reflecting mirror is arranged on the side of the observation chamber close to the detection piece.

6. The radius detection device according to claim 1, wherein The housing includes a main body and a first connecting part. The measurement component is arranged in the middle of the main body, the lighting component is arranged on one side of the main body, the first connecting part is arranged on the side of the main body far from the lighting component. The observation component further includes a second connecting part, and the second connecting part is slidably connected to the first connecting part.

7. The radius detection device according to claim 6, characterized in that, The first connecting part is provided with a chute, and the second connecting part is provided with a protruding part, and the protruding part is slidably connected to the chute.

8. The radius detection device according to claim 1, characterized in that, The detection piece is detachably connected to the housing.

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