An inspection fixture for large-sized thin-walled ring-shaped parts

Abstract

The present invention relates to an inspection fixture for large-sized thin-walled ring-shaped parts. The thin-walled ring-shaped parts have a thin-walled ring portion. The inspection fixture includes a base, a restraint disc fixedly installed on the base, and a clamping mechanism arranged on the restraint disc. A circular restraint groove cavity is provided on the front end face of the restraint disc. The bottom of the restraint groove cavity has a vertical restraint plane. The side wall surface of one circle of the restraint groove cavity is perpendicular to the restraint plane and forms a restraint circular surface, and the radius of the restraint circular surface is greater than the outer diameter of the thin-walled ring portion. The restraint groove cavity is used to place the thin-walled ring portion of the thin-walled ring-shaped part, and the end face of the thin-walled ring portion is attached to the restraint plane. The clamping mechanism is used to fix the thin-walled ring-shaped part on the restraint disc. A plurality of first detection through holes and a plurality of second detection through holes are also formed on the rear end face of the restraint disc. The first detection through holes are located at the restraint circular surface and are arranged at different positions. The second detection through holes are located in the restraint plane and are arranged at different positions.

Description

Technical Field

[0001] The present invention relates to the field of mechanical inspection, and particularly to an inspection fixture for large-size thin-walled ring-shaped parts. Background Art

[0002] During the machining process of workpieces, large-size thin-walled ring-shaped parts are prone to machining deformation due to various factors. Thin-walled ring-shaped parts often need to be subjected to base surface calibration, and the inspection contents include the outer circular surface and the end face. When using instruments such as coordinate measuring probes for inspection, the thin-walled ring-shaped parts need to be in a vertical state of the end face. If the thin-walled ring-shaped parts are inspected in a natural state, the accumulated errors will be relatively large, affecting the inspection results. At the same time, when the inspection reference surface is in the end face situation, due to the large size and weight of the workpiece, it is somewhat difficult to turn it over. Summary of the Invention

[0003] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the present invention is to provide an inspection fixture for large-size thin-walled ring-shaped parts, which can well hold the thin-walled ring-shaped parts for detection, reduce the deformation amount after part machining, reduce the measurement difficulty, and improve the efficiency.

[0004] To achieve the above object, the present invention provides an inspection fixture for large-size thin-walled ring-shaped parts. The thin-walled ring-shaped parts have a thin-walled ring portion. The inspection fixture includes a base, a restraint disk fixedly installed on the base, and a clamping mechanism provided on the restraint disk. A circular restraint groove cavity is provided on the front end face of the restraint disk. The bottom of the restraint groove cavity has a vertical restraint plane. The side wall surface of one circle of the restraint groove cavity is perpendicular to the restraint plane and forms a restraint circular surface, and the radius of the restraint circular surface is greater than the outer diameter of the thin-walled ring portion. The restraint groove cavity is used to place the thin-walled ring portion of the thin-walled ring-shaped parts, and the end face of the thin-walled ring portion is attached to the restraint plane. The clamping mechanism is used to fix the thin-walled ring-shaped parts on the restraint disk. A plurality of first detection through holes and a plurality of second detection through holes are further provided on the rear end face of the restraint disk. The first detection through holes are located at the restraint circular surface and are arranged at different positions. The second detection through holes are located in the restraint plane and are arranged at different positions.

[0005] Further, the first detection through holes are evenly distributed in the circumferential direction of the restraint circular surface.

[0006] Further, a plurality of second detection through holes are evenly arranged along the circumferential direction at the edge of the restraint plane.

[0007] Further, the restraint disk is detachably installed on the base. A first positioning plane parallel to the restraint plane is provided at the rear end of the restraint disk. A vertical second positioning plane is provided on the base. When the restraint disk is installed on the base, the first positioning plane and the second positioning plane are attached to each other.

[0008] Further, the base includes a bottom plate and a support block fixed on the bottom plate. The second positioning plane is arranged on the support block. A horizontal support plane is further provided at the upper end of the support block. A support mating surface perpendicular to the first positioning plane is provided on the side surface of the restraint disc. The restraint disc is placed on the support plane, and the support mating surface is in close contact with the support plane.

[0009] Further, the restraint disc on the base is a disc, and the outer peripheral surface of the restraint disc constitutes the support mating surface. The base further includes two adjustment frames fixedly installed on the bottom plate and located on the left and right sides of the support block. A third positioning plane is provided on the adjustment frame. The restraint disc is fixedly connected to the adjustment frame, and the first positioning plane is in fit with the third positioning plane.

[0010] Further, the bottom of the adjustment frame is fixed on the bottom plate by bolts.

[0011] Further, a plurality of fixing threaded holes for installing the adjustment frame are provided on the bottom plate in the left - right direction, so that the adjustment frame can be installed at different positions in the left - right direction of the bottom plate.

[0012] Further, the clamping mechanism includes a plurality of pressing plates installed on the restraint disc, and the pressing plates are evenly arranged circumferentially along the restraint circular surface.

[0013] Further, the pressing plates are installed on the restraint disc by bolts.

[0014] As described above, the inspection fixture involved in the present invention has the following beneficial effects:

[0015] By providing a base, a restraint disc, and a clamping mechanism, during use, the inspection fixture is placed well to ensure that the restraint plane remains vertical. The thin - walled ring part of the thin - walled ring - like part is loaded into the restraint cavity, and is fixed by the clamping mechanism to ensure that the end face of the thin - walled ring part is in close contact with the restraint plane. At this time, the end face of the thin - walled ring part remains vertical, and the restraint plane can play a role in restraining the axial deformation of the thin - walled ring part; moreover, the radial deformation of the thin - walled ring part is restrained by the restraint circular surface, so that the deformation amount is within the required range. After the thin - walled ring part is installed, the probe extends from the rear end face of the restraint disc into different first detection through - holes to contact different positions on the outer circular surface of the thin - walled ring part for detection, and extends into different second detection through - holes to contact different positions on the end face of the thin - walled ring part for detection. The inspection fixture of the present invention can clamp the thin - walled ring - like part well, reduce the deformation amount after part processing, can quickly calibrate and measure the end face and the outer circular surface of the thin - walled ring part, reduce the measurement difficulty, and improve the efficiency. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the front side of the inspection fixture of the present invention.

[0017] Figure 2 This is a schematic structural view of the rear side of the inspection fixture of the present invention.

[0018] Figure 3 This is a schematic structural view of the bottom plate in the present invention.

[0019] Figure 4 This is a schematic structural view of the adjustment frame in the present invention.

[0020] Figure 5 This is a schematic structural view of the support block in the present invention.

[0021] Figure 6 This is a schematic structural view of the restraint disc in the present invention.

[0022] Figure 7 This is a schematic structural view of a thin-walled ring-shaped part.

[0023] Description of Component Labels

[0024] 1 Bottom plate

[0025] 11 Fixed threaded hole

[0026] 12 First limiting plane

[0027] 2 Adjustment frame

[0028] 21 Bottom surface of the adjustment frame

[0029] 22 Third positioning plane

[0030] 23 Connecting through hole

[0031] 3 Support block

[0032] 31 Bottom surface of the support block

[0033] 32 Second limiting plane

[0034] 33 Third limiting plane

[0035] 34 Second positioning plane

[0036] 35 Support plane

[0037] 4 Restraint disc

[0038] 41 Restraint plane

[0039] 42 Restraint circular surface

[0040] 43 First detection through hole

[0041] 44 Second detection through hole

[0042] 45 First positioning plane

[0043] 46 Support mating surface

[0044] 47 Support fixing threaded hole

[0045] 48 Adjustment fixing threaded hole

[0046] 5 Pressure plate

[0047] 6 Thin-walled ring-shaped part

[0048] 61 Thin-walled ring portion Detailed implementation manners

[0049] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0050] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0051] See Figures 1 to 7 , the present invention provides an inspection fixture for a large-sized thin-walled ring-shaped part 6. The thin-walled ring-shaped part 6 has a thin-walled ring portion 61, and the end face of the thin-walled ring portion 61 is perpendicular to its outer peripheral surface. During inspection, it is necessary to detect and calibrate the outer peripheral surface and the end face of the thin-walled ring portion 61.

[0052] The inspection fixture of the present invention includes a base, a restraint disk 4 fixedly installed on the base, and a clamping mechanism provided on the restraint disk 4. A circular restraint groove cavity is provided on the front end face of the restraint disk 4. The bottom of the restraint groove cavity has a vertical restraint plane 41. The side wall surface of one circle of the restraint groove cavity is perpendicular to the restraint plane 41 and forms a restraint circular surface 42. That is, the axis of the restraint circular surface 42 is in a horizontal state. The radius of the restraint circular surface 42 is greater than the outer diameter of the thin-walled ring portion 61. The restraint groove cavity is used to place the thin-walled ring portion 61 of the thin-walled ring-like part 6, and the end face of the thin-walled ring portion 61 is attached to the restraint plane 41. The clamping mechanism is used to fix the thin-walled ring-like part 6 on the restraint disk 4. A plurality of first detection through holes 43 and a plurality of second detection through holes 44 are also provided on the rear end face of the restraint disk 4. The first detection through holes 43 are located at the restraint circular surface 42 and are arranged at different positions. The second detection through holes 44 are located in the restraint plane 41 and are arranged at different positions.

[0053] The basic working principle of the inspection fixture involved in the present invention is as follows: When in use, the inspection fixture is placed well, and the restraint disk 4 is placed vertically to ensure that the restraint plane 41 therein remains vertical at this time. The thin-walled ring portion 61 of the thin-walled ring-like part 6 is loaded into the restraint groove cavity and fixed well by using the clamping mechanism to ensure that the end face of the thin-walled ring portion 61 is in close contact with the restraint plane 41. At this time, the end face of the thin-walled ring portion 61 remains vertical, which is convenient for the detection device to perform end face detection. At the same time, the restraint plane 41 can play a role in restraining the axial deformation of the thin-walled ring portion 61. In addition, since the radius of the restraint circular surface 42 is greater than the outer diameter of the thin-walled ring portion 61, there is a clearance fit between the two. Among them, the radius difference X (that is, the clearance) between the two is set according to the requirements of the implementation work. The restraint circular surface 42 is used to restrain the radial deformation of the thin-walled ring portion 61 so that its deformation amount is within the required range. Preferably, the radius difference X is 0.06 - 0.08 mm, which can achieve good restraint of radial deformation. After the thin-walled ring portion 61 is installed, corresponding detection devices are used for detection. For example, a three-coordinate probe is used to detect and calibrate the end face and outer circular surface of the thin-walled ring portion 61. Specifically, the probe extends from the rear end face of the restraint disk 4 into different first detection through holes 43 and contacts different positions on the outer circular surface of the thin-walled ring portion 61 for detection, and extends into different second detection through holes 44 and contacts different positions on the end face of the thin-walled ring portion 61 for detection. The inspection fixture of the present invention can hold the thin-walled ring-like part 6 well, reduce the deformation amount after part processing, can quickly calibrate and measure the end face and outer circular surface of the thin-walled ring portion 61, reduce the measurement difficulty, and improve the efficiency. When the thin-walled ring-like part 6 is on the inspection fixture, the end face of the end far from the restraint disk 4 can also be normally measured, so that it is not necessary to turn over the thin-walled ring-like part 6.

[0054] See Figures 1 to 7 , the following further illustrates the present invention with a specific embodiment:

[0055] In this embodiment, refer to Figure 1 、 Figure 2 and Figure 6 , as a preferred design, the first detection through holes 43 are uniformly distributed in the circumferential direction of the constraint circular surface 42, and the number thereof can be set according to specific needs, so that the detection points are evenly located on the outer peripheral surface of the thin-walled ring portion 61. And the first detection through holes 43 are strip-shaped and extend radially from the outside of the constraint circular surface 42 to the inside of the constraint circular surface 42, so as to facilitate the detection operation. The second detection through holes 44 are circular holes, and a plurality of second detection through holes 44 are uniformly arranged along the circumferential direction at the edge of the constraint plane 41, and the second detection through holes 44 can also be provided at other positions, so as to facilitate the detection and calibration of the end surface of the thin-walled ring portion 61.

[0056] In this embodiment, refer to Figure 1 、 Figure 2 and Figure 6 , as a preferred design, the constraint disk 4 is detachably mounted on the base, and specifically, bolts or other fasteners can be used for connection. A first positioning plane 45 parallel to the constraint plane 41 is provided at the rear end of the constraint disk 4, and a vertical second positioning plane 34 is provided on the base. When the constraint disk 4 is mounted on the base, the first positioning plane 45 and the second positioning plane 34 are in contact with each other, so as to facilitate the positioning and mounting of the constraint disk 4, so that the constraint plane 41 can be kept vertical when it is mounted. In this embodiment, the base includes a bottom plate 1 and a support block 3 fixed on the bottom plate 1. The second positioning plane 34 is provided on the support block 3. At the same time, a horizontal support plane 35 is further provided at the upper end of the support block 3. The support plane 35 and the second positioning plane 34 together form a notch. A support mating surface 47 perpendicular to the first positioning plane 45 is provided on the side surface of the constraint disk 4. The constraint disk 4 is placed on the support plane 35, and the support mating surface 47 is in close contact with the support plane 35. The support plane 35 of the support block 3 and the support mating surface 47 of the constraint disk 4 are used to stably support the constraint disk 4, and the constraint disk 4 and the support block 3 are fixedly connected, so as to stably fix the constraint disk 4.

[0057] In this embodiment, refer to Figure 1 、 Figure 2 and Figure 6, Further, the restraint disc 4 on the base is a disc, and the outer peripheral surface of the restraint disc 4 constitutes a support mating surface 47, that is, the support mating surface 47 is an arc surface. At this time, the support mating surface 47 is in line contact with the support plane 35. The base further includes two adjusting frames 2 fixedly installed on the bottom plate 1 and located on the left and right sides of the support block 3. The adjusting frame 2 is provided with a third positioning plane 22. The restraint disc 4 is fixedly connected to the adjusting frame 2, and the first positioning plane 45 fits with the third positioning plane 22. Using a circular restraint disc 4 facilitates installation and position adjustment, and uses two adjusting frames 2 to stabilize the restraint disc 4. The restraint disc 4 is detachably installed between the adjusting frame 2 and between the restraint disc 4 and the support block 3. Specifically, a connection through hole 23 is provided on the adjusting frame 2, and a corresponding adjusting and fixing threaded hole 48 is provided at the middle position of the restraint disc 4. By passing a bolt through the connection through hole 23 and screwing it into the adjusting and fixing threaded hole 48, the restraint disc 4 can be conveniently fixed on the adjusting frame. A support connection threaded hole 47 is provided at the edge position of the restraint disc 4. By passing a bolt through the through hole on the support block 3 and screwing it into the support connection threaded hole 47, it can be done. In this embodiment, multiple groups of support connection threaded holes 47 and adjusting and fixing threaded holes 48 can be provided on the restraint disc 4. Refer to Figure 6 , support connection threaded holes 47 and adjusting and fixing threaded holes 48 are provided in the four directions of up, down, left, and right. When installing the restraint disc 4, its position can be rotated and adjusted and then fixed, which is convenient for installation. Of course, other fasteners can also be used for detachable fixed connection between the restraint disc 4 and the support block 3 and the adjusting frame 2.

[0058] In this embodiment, refer to Figure 1 and Figure 6 , Preferably, the restraint disc 4 is provided with a middle through hole and an arc groove for hollowing out to reduce the mass, and a lifting hole is provided for convenient lifting.

[0059] In this embodiment, refer to Figure 1 and Figure 3 , As a preferred design, the base includes a bottom plate 1, a support block 3, and two adjusting frames 2. The bottom plate 1 is in a two-stage stepped shape, having a high-order surface and a low-order surface. A first limiting plane 12 is formed between the high-order surface and the low-order surface. Fixed threaded holes 11 are provided on the low-order surface. The support block 3 and the two adjusting frames 2 are fixedly connected to the fixed threaded holes 11 by bolts. Moreover, multiple groups of fixed threaded holes 11 for installing the adjusting frame 2 are provided on the bottom plate 1 in the left-right direction, so that the adjusting frame 2 can be installed at different positions in the left-right direction of the bottom plate 1, so as to be able to install restraint discs 4 with different radius sizes, and the use is more flexible.

[0060] Refer to Figure 4, in this embodiment, the adjusting frame 2 is a tripod structure with triangular openings at the inclined ribs, which can reduce the weight and facilitate hoisting. There are multiple countersunk holes at the bottom, facilitating the bolts to pass through and be screwed into the fixed threads for control. The adjusting frame 2 utilizes the bottom surface 21 of the adjusting frame to fit with the lower step surface. The rear side of the adjusting frame 2 is the third positioning plane 22, which extends to the lower end. During installation, the lower end of the third positioning plane 22 closely fits with the first limiting plane 12 of the bottom plate 1, thus facilitating the installation and positioning of the adjusting frame 2 and providing installation stability. Refer to Figure 5 , the support block 3 is also a tripod structure with triangular openings at the inclined ribs, which can reduce the weight and facilitate hoisting. During installation, the bottom surface 31 of the support block fits on the lower step surface. There are a vertical second limiting plane 32 and a horizontal third limiting plane at the rear side of the bottom of the support block 3. During installation, the second limiting plane 32 and the horizontal third limiting plane 33 respectively closely fit with the first limiting plane 12 and the higher step surface of the bottom plate 1, thus facilitating the installation and positioning of the support block 3 and ensuring the installation stability of the support block 3.

[0061] In this embodiment, refer to Figure 1 and Figure 6 , as a preferred design, the clamping mechanism includes multiple pressing plates 5 installed on the restraint disc 4, and the pressing plates 5 are evenly arranged circumferentially along the restraint circular surface 42 and are located inside the restraint circular surface 42. Specifically, threaded holes can be provided on the restraint disc 4, and the pressing plates 5 are detachably installed on the restraint disc 4 through bolts and tightly press the thin-walled ring-shaped part 6 evenly.

[0062] In summary, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0063] The above embodiments merely illustrate the principle and its efficacy of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An inspection fixture for large-sized thin-walled ring-shaped parts, the thin-walled ring-shaped part (6) having a thin-walled ring portion (61), characterized in that: The inspection fixture includes a base, a restraint disk (4) fixedly mounted on the base, and a clamping mechanism provided on the restraint disk (4). A circular restraint groove cavity is provided on the front end face of the restraint disk (4). The bottom of the restraint groove cavity has a vertical restraint plane (41). The circumferential side wall surface of the restraint groove cavity is perpendicular to the restraint plane (41) and forms a restraint circular surface (42). The radius of the restraint circular surface (42) is greater than the outer diameter of the thin-walled ring portion (61). The difference X between the radius of the restraint circular surface (42) and the outer diameter of the thin-walled ring portion (61) is 0.06 - 0.08 mm. The restraint groove cavity is used to place the thin-walled ring portion (61) of the thin-walled ring part (6), and the end face of the thin-walled ring portion (61) is in contact with the restraint plane (41). The clamping mechanism is used to fix the thin-walled ring part (6) on the restraint disk (4). A plurality of first detection through holes (43) and a plurality of second detection through holes (44) are further provided on the rear end face of the restraint disk (4). The first detection through holes (43) are located at the restraint circular surface (42) and are arranged at different positions. The second detection through holes (44) are located in the restraint plane (41) and are arranged at different positions. The first detection through holes (43) are evenly distributed in the circumferential direction of the restraint circular surface (42). The first detection through holes (43) are strip-shaped and extend radially from the outside of the restraint circular surface (42) to the inside of the restraint circular surface (42). A plurality of second detection through holes (44) are evenly arranged along the circumference at the edge of the restraint plane (41). The first detection through holes (43) are used for a probe to extend into from the rear end face of the restraint disk (4), and the probe can contact the outer circular surface of the thin-walled ring portion (61) for detection. The second detection through holes (44) are used for a probe to extend into from the rear end face of the restraint disk (4), and the probe can contact the end face of the thin-walled ring portion (61) for detection.

2. The inspection fixture according to claim 1, wherein: The restraint disk (4) is detachably mounted on the base. A first positioning plane (42) parallel to the restraint plane (41) is provided at the rear end of the restraint disk (4). A vertical second positioning plane (34) is provided on the base. When the restraint disk (4) is mounted on the base, the first positioning plane (42) and the second positioning plane (34) are in contact with each other.

3. The inspection fixture according to claim 2, wherein: The base includes a bottom plate (1) and a support block (3) fixed on the bottom plate (1). The second positioning plane (34) is provided on the support block (3). A horizontal support plane (35) is further provided at the upper end of the support block (3). A support mating surface (46) perpendicular to the first positioning plane (45) is provided on the side surface of the restraint disk (4). The restraint disk (4) is placed on the support plane (35), and the support mating surface (46) is in close contact with the support plane (35).

4. The inspection fixture according to claim 3, wherein: The restraint disc (4) on the base is a disc, and the outer peripheral surface of the restraint disc (4) constitutes a support mating surface (46). The base further includes two adjusting frames (2) fixedly installed on the base plate (1) and located on the left and right sides of the support block (3). The adjusting frame (2) is provided with a third positioning plane (22). The restraint disc (4) is fixedly connected to the adjusting frame (2), and the first positioning plane (45) is in contact with the third positioning plane (22).

5. The inspection fixture according to claim 4, wherein: The bottom of the adjusting frame (2) is fixed to the base plate (1) by bolts.

6. The inspection fixture according to claim 5, wherein: A plurality of fixing threaded holes (11) for installing the adjusting frame (2) are provided on the base plate (1) in the left-right direction, so that the adjusting frame (2) can be installed at different positions in the left-right direction of the base plate (1).

7. The inspection fixture according to claim 1, wherein: The clamping mechanism includes a plurality of pressing plates (5) installed on the restraint disc (4), and the pressing plates (5) are evenly arranged circumferentially along the restraint circular surface (42).

8. The inspection fixture according to claim 7, wherein: The pressing plate (5) is installed on the restraint disc (4) by bolts.

Images