Workpiece radian detection tool

Abstract

The utility model discloses a workpiece radian detection tool. The workpiece radian detection tool comprises a base and a plurality of first positioning mechanisms. The base is provided with a bearing surface, the bearing surface of the base is provided with a plurality of first strip-shaped guide parts and a centering part, all the first strip-shaped guide parts are arranged around the centering part at intervals, and the first strip-shaped guide parts extend towards the centering part; the first positioning mechanisms are in one-to-one correspondence with the first strip-shaped guide parts, each first positioning mechanism comprises an arc section positioning block and a first locking structure, and the arc section positioning blocks are movably arranged on the base and can move along the corresponding first strip-shaped guide parts; the first locking structures can lock or unlock the positions, relative to the base, of the corresponding arc section positioning blocks, the arc section positioning blocks are provided with arc section stopping parts, and all the arc section stopping parts are located on the bearing face and can be arranged in an arc shape around the centering part.

Description

Technical Field

[0001] This utility model relates to inspection fixtures, and in particular to a workpiece curvature inspection fixture. Background Technology

[0002] Some existing bent pipe workpieces have an arc-shaped segment and straight segments connecting the two ends of the arc-shaped segment. During the production of these bent pipe workpieces, inspection fixtures are required to check whether the curvature specifications of the arc-shaped segment meet the design standards. Some existing curvature inspection fixtures install multiple positioning blocks on a base, all arranged in an arc shape. The bent pipe workpiece is then placed on the base; if the bent pipe fits snugly against all the positioning blocks, the curvature is considered acceptable; otherwise, it is unacceptable. However, with this type of curvature inspection fixture, a corresponding fixture needs to be produced for each type of curved pipe workpiece, resulting in insufficient versatility and high overall production costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a workpiece curvature detection fixture, which has good versatility and reduces production costs.

[0004] According to an embodiment of the present invention, a workpiece curvature detection fixture includes a base and a plurality of first positioning mechanisms. The base has a supporting surface, and the base has a plurality of first strip-shaped guide portions and a centering portion on the supporting surface. All the first strip-shaped guide portions are arranged at intervals around the centering portion, and the first strip-shaped guide portions extend toward the centering portion. Each first positioning mechanism corresponds to one of the first strip-shaped guide portions. Each first positioning mechanism includes an arc segment positioning block and a first locking structure. The arc segment positioning block is movably disposed on the base and can move along the corresponding first strip-shaped guide portion. The first locking structure can lock or unlock the position of the corresponding arc segment positioning block relative to the base. The arc segment positioning block is provided with an arc segment stop portion, and all the arc segment stop portions are located on the supporting surface and can be arranged in an arc shape around the centering portion.

[0005] The workpiece curvature detection fixture according to the embodiment of this utility model has at least the following beneficial effects: During detection, the workpiece is placed on the supporting surface of the base, and the arc segment of the workpiece is brought closer to the arc segment stop of the arc segment positioning block to determine whether it can fit the entire arc segment positioning block, thereby determining whether the curvature of the workpiece is qualified; when it is necessary to apply it to workpieces with different curvature specifications, the position of the arc segment positioning block can be unlocked by the first locking structure, and then the arc segment positioning block moves along the first strip guide. The distance between the arc segment positioning block and the centering part is adjusted according to the specification standard, and then the position of the arc segment positioning block is locked again by the first locking structure. By adjusting the arc arrangement position of all the arc segment positioning blocks, it can be applied to workpieces with different curvature specifications, with good versatility and reduced production costs.

[0006] According to some embodiments of the present invention, the first strip-shaped guide portion is a first strip-shaped hole, and the arc segment positioning block is slidably disposed in the first strip-shaped hole.

[0007] According to some embodiments of this utility model, the first strip-shaped hole is a through hole, the first locking structure includes a bolt and a nut, the arc-shaped positioning block is provided with a through hole, the screw portion of the bolt passes through the first strip-shaped hole and the through hole, the nut is threadedly connected to the screw portion, and locks the arc-shaped positioning block to the base.

[0008] According to some embodiments of this utility model, the bolt is a wing bolt.

[0009] According to some embodiments of the present invention, a countersunk groove is provided at one end of the first strip hole away from the supporting surface, the nut is accommodated in the countersunk groove, and the side wall of the countersunk groove can contact the outer side wall of the nut to restrict the rotation of the nut.

[0010] According to some embodiments of the present invention, the cross-section of the arc segment stop is circular.

[0011] According to some embodiments of the present invention, the distance between the end of all the first strip-shaped holes and the centering part is the same, and the centering part is a circular hole.

[0012] According to some embodiments of this utility model, all of the first strip holes have the same length.

[0013] According to some embodiments of the present invention, all the first strip guide portions are evenly arranged around the centering portion, and the two first strip guide portions located at both ends of the arrangement direction are perpendicular to each other.

[0014] According to some embodiments of this utility model, it further includes two second positioning mechanisms. The base is provided with two second strip-shaped guide portions on the supporting surface. The two second strip-shaped guide portions are arranged at intervals around the centering portion. All the first strip-shaped guide portions are located between the two second strip-shaped guide portions. The second strip-shaped guide portions are parallel to the adjacent first strip-shaped guide portions. The two second positioning mechanisms correspond one-to-one with the two second strip-shaped guide portions. The second positioning mechanism includes a straight segment positioning block and a second locking structure. The straight segment positioning block is movably disposed on the base and can move along the corresponding second strip-shaped guide portion. The second locking structure can lock or unlock the position of the corresponding straight segment positioning block relative to the base. The straight segment positioning block is provided with a straight segment stop portion, and the straight segment stop portion is located on the supporting surface.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a three-dimensional schematic diagram of the workpiece curvature detection fixture according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the back of the workpiece curvature detection fixture according to an embodiment of the present utility model;

[0019] Figure 3 This is an embodiment of the present utility model. Figure 2 A magnified view of a portion of point A;

[0020] Figure 4 This is an exploded view of the first positioning mechanism according to an embodiment of the present invention.

[0021] Figure label:

[0022] Base 100, supporting surface 110, first strip guide part 120, centering part 130, countersunk groove 140, second strip guide part 150;

[0023] First positioning mechanism 200, arc segment positioning block 210, arc segment stop part 211, through hole 212, first locking structure 220, bolt part 221, nut part 222;

[0024] The second positioning mechanism 300, the straight section positioning block 310, the straight section stop part 311, and the second locking structure 320. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0028] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Reference Figures 1 to 4 The workpiece curvature detection fixture of this utility model includes a base 100 and a plurality of first positioning mechanisms 200. The base 100 is provided with a support surface 110. The base 100 is provided with a plurality of first strip-shaped guide portions 120 and centering portions 130 on the support surface 110. All the first strip-shaped guide portions 120 are arranged at intervals around the centering portions 130 and extend towards the centering portions 130. The first positioning mechanism 200 corresponds one-to-one with the first strip-shaped guide portions 120. The first positioning mechanism 200 includes an arc segment positioning block 210 and a first locking structure 220. The arc segment positioning block 210 is movably disposed on the base 100 and can move along the corresponding first strip-shaped guide portion 120. The first locking structure 220 can lock or unlock the position of the corresponding arc segment positioning block 210 relative to the base 100. The arc segment positioning block 210 is provided with an arc segment stop portion 211. All the arc segment stop portions 211 are located on the support surface 110 and can be arranged in an arc shape around the centering portion 130.

[0030] During testing, the workpiece is placed on the support surface 110 of the base 100, and the arc-shaped segment of the workpiece is brought closer to the arc-shaped stop 211 of the arc-shaped positioning block 210 to determine whether it can fit the entire arc-shaped positioning block 210, thereby determining whether the arc of the workpiece is qualified. When it is necessary to apply it to workpieces with different arc specifications, the position of the arc-shaped positioning block 210 can be unlocked through the first locking structure 220. Then, the arc-shaped positioning block 210 moves along the first strip guide 120. The distance between the arc-shaped positioning block 210 and the centering part 130 is adjusted according to the specification standard. Then, the position of the arc-shaped positioning block 210 is locked again through the first locking structure 220. By adjusting the arc arrangement of all the arc-shaped positioning blocks 210, it can be applied to workpieces with different arc specifications, which has good versatility and reduces production costs.

[0031] Specifically, the base 100 has a plate-like shape, a compact structure, and a small volume.

[0032] Specifically, there are five of each of the first positioning mechanism 200 and the first strip guide portion 120. It is understood that in some embodiments, there may be three, four or other quantities of the first positioning mechanism 200 and the first strip guide portion 120, and those skilled in the art can choose according to actual needs.

[0033] In this embodiment, the first strip-shaped guide portion 120 is a first strip-shaped hole, and the arc segment positioning block 210 is slidably disposed in the first strip-shaped hole. The first strip-shaped guide portion 120 is formed through the first strip-shaped hole, and the arc segment positioning block 210 can move along the first strip-shaped guide portion 120 by sliding. The structure is simple and easy to implement.

[0034] In this embodiment, the first strip-shaped hole is a through hole, and the first locking structure 220 includes a bolt 221 and a nut 222. The arc-shaped positioning block 210 is provided with a through hole 212. The threaded portion of the bolt 221 passes through the first strip-shaped hole and the through hole 212, and the nut 222 is threadedly connected to the threaded portion, thus locking the arc-shaped positioning block 210 to the base 100. The arc-shaped positioning block 210 is locked to the base 100 by the bolt 221 and the nut 222. When the bolt 221 and the nut 222 are tightened, the position of the arc-shaped positioning block 210 relative to the base 100 can be locked; when the bolt 221 and the nut 222 are loosened, the arc-shaped positioning block 210 is allowed to slide along the first strip-shaped hole. The structure is simple and easy to implement.

[0035] In this embodiment, the bolt 221 is a wing bolt, which allows the user to manually tighten the bolt 221 to directly lock or unlock the movement of the arc segment positioning block 210, making it relatively convenient to use.

[0036] In this embodiment, a countersunk groove 140 is provided at the end of the first strip-shaped hole facing away from the support surface 110. The nut 222 is accommodated in the countersunk groove 140, and the sidewall of the countersunk groove 140 can contact the outer sidewall of the nut 222 to restrict the rotation of the nut 222. The countersunk groove 140 allows the nut 222 to be embedded within the base 100, which helps reduce the thickness of the workpiece curvature detection fixture. Furthermore, since the sidewall of the countersunk groove 140 restricts the rotation of the nut 222, the user can directly tighten or loosen the bolt 221 without needing an additional workpiece to hold the nut 222 in place, making it convenient to use. Specifically, the width of the countersunk groove 140 is slightly larger than the minimum width of the nut 222, and slightly smaller than the maximum width of the nut 222, so that the nut 222 cannot rotate within the countersunk groove 140.

[0037] In this embodiment, the cross-section of the arc stop 211 is circular, which makes it easy to adapt to and abut against workpieces with different curvature specifications, and is beneficial for workpiece curvature detection.

[0038] In this embodiment, the ends of all the first strip holes are at the same distance from the centering portion 130, which is a circular hole. This structure facilitates adjusting all the arc segment positioning blocks 210 to the same distance, and the structure of the centering portion 130 is relatively simple, making it easy to measure the distance between the centering portion 130 and the arc segment positioning block 210.

[0039] It is conceivable that in other embodiments, the first strip guide portion 120 may also be other structures. For example, the first strip guide portion 120 may be a guide post, and a guide hole may be provided in the arc segment positioning block 210. The guide post may slide through the guide hole, so that the arc segment positioning block 210 can move along the first strip guide portion 120; or the first strip guide portion 120 may be a slide rail, and a sliding groove may be provided in the arc segment positioning block 210. The sliding groove may slide to the slide rail, so that the arc segment positioning block 210 can move along the first strip guide portion 120.

[0040] It is conceivable that in other embodiments, the first locking structure 220 can also be other structures. For example, the first strip guide portion 120 is a dovetail groove, the first locking structure 220 can be a screw, the arc segment positioning block 210 is provided with a threaded through hole, the screw is threadedly connected to the threaded through hole, when the screw is tightened, it extends out and abuts against the bottom of the dovetail groove, thereby locking the arc segment positioning block 210; when the screw is loosened, the screw disengages from the bottom of the dovetail groove, thereby unlocking the arc segment positioning block 210; or the first locking structure 220 can also be a clamp, the clamp is installed on the base 100, when the clamp clamps the arc segment positioning block 210, the position of the arc segment positioning block 210 is locked; when the clamp releases the arc segment positioning block 210, the arc segment positioning block 210 is allowed to move.

[0041] It is conceivable that in other embodiments, the centering portion 130 may also be other structures, such as a protruding pillar or a protruding dot, or it may be marked.

[0042] In this embodiment, all the first strip guide portions 120 are evenly arranged around the centering portion 130, and the two first strip guide portions 120 located at both ends of the arrangement direction are perpendicular to each other. The above-described layout is beneficial for relatively uniformly detecting whether the workpiece is qualified at various points of the arc segment, resulting in a relatively good detection effect; and it is also better suited for detecting right-angle arcs.

[0043] In this embodiment, all the first strip holes are of the same length, which makes it easier for each arc segment positioning block 210 to be adjusted to the same distance from the centering part 130, thus improving the adjustment flexibility and enhancing the versatility of the arc segment detection fixture.

[0044] In this embodiment, two second positioning mechanisms 300 are also included. The base 100 has two second strip-shaped guide portions 150 on the support surface 110. The two second strip-shaped guide portions 150 are arranged at intervals around the centering portion 130. All the first strip-shaped guide portions 120 are located between the two second strip-shaped guide portions 150. The second strip-shaped guide portions 150 are parallel to the adjacent first strip-shaped guide portions 120. The two second positioning mechanisms 300 correspond one-to-one with the two second strip-shaped guide portions 150. The second positioning mechanism 300 includes a straight segment positioning block 310 and a second locking structure 320. The straight segment positioning block 310 is movably disposed on the base 100 and can move along the corresponding second strip-shaped guide portion 150. The second locking structure 320 can lock or unlock the position of the corresponding straight segment positioning block 310 relative to the base 100. The straight segment positioning block 310 is provided with a straight segment stop portion 311, which is located on the support surface 110.

[0045] The second positioning mechanism 300 and the second strip-shaped guide section allow the straight segment positioning block 310 to be adjusted to a position tangent to the arcuate arrangement direction of all the arcuate segment positioning blocks 210. This is used to detect whether the two straight segments of the workpiece are tangent to the arcuate segment of the workpiece. The adjustment via the second locking structure 320 and the straight segment positioning block 310 makes it suitable for different arcuate specifications, offering good versatility. The second strip-shaped guide section 150 is parallel to the first strip-shaped guide section 120, facilitating the adjustment of the straight segment positioning block 310 to a position tangent to the arcuate arrangement direction of all the arcuate segment positioning blocks 210.

[0046] Specifically, the structure of the second positioning mechanism 300 is the same as that of the first positioning mechanism 200, that is, the straight segment positioning block 310 and the arc segment positioning block 210 have the same structure, the specific structure of the second locking structure 320 is the same as that of the first locking structure 220; and the specific structure of the second strip guide 150 is also the same as that of the first strip guide 120, which helps to simplify the structure of the workpiece curvature detection fixture.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A workpiece curvature detection fixture, characterized in that, include: A base (100) is provided with a support surface (110). The base (100) is provided with a plurality of first strip guide portions (120) and centering portions (130) on the support surface (110). All the first strip guide portions (120) are arranged at intervals around the centering portion (130). The first strip guide portions (120) extend toward the centering portion (130). Multiple first positioning mechanisms (200) correspond one-to-one with the first strip guide portion (120). Each first positioning mechanism (200) includes an arc segment positioning block (210) and a first locking structure (220). The arc segment positioning block (210) is movably disposed on the base (100) and can move along the corresponding first strip guide portion (120). The first locking structure (220) can lock or unlock the position of the corresponding arc segment positioning block (210) relative to the base (100). The arc segment positioning block (210) is provided with an arc segment stop portion (211). All the arc segment stop portions (211) are located on the support surface (110) and can be arranged in an arc around the centering portion (130).

2. The workpiece curvature detection fixture according to claim 1, characterized in that: The first strip guide portion (120) is a first strip hole, and the arc segment positioning block (210) is slidably disposed in the first strip hole.

3. The workpiece curvature detection fixture according to claim 2, characterized in that: The first strip hole is a through hole. The first locking structure (220) includes a bolt (221) and a nut (222). The arc segment positioning block (210) is provided with a through hole (212). The screw part of the bolt (221) passes through the first strip hole and the through hole (212). The nut (222) is threaded to the screw part and locks the arc segment positioning block (210) to the base (100).

4. The workpiece curvature detection fixture according to claim 3, characterized in that: The bolt (221) is a wing bolt.

5. The workpiece curvature detection fixture according to claim 3, characterized in that: A countersunk groove (140) is provided at one end of the first strip hole away from the support surface (110). The nut (222) is accommodated in the countersunk groove (140). The side wall of the countersunk groove (140) can contact the outer side wall of the nut (222) to restrict the rotation of the nut (222).

6. The workpiece curvature detection fixture according to claim 2, characterized in that: The cross-section of the arc-shaped stop (211) is circular.

7. The workpiece curvature detection fixture according to claim 2, characterized in that: All the ends of the first strip-shaped holes are at the same distance from the centering part (130), which is a circular hole.

8. The workpiece curvature detection fixture according to claim 7, characterized in that: All of the first strip holes have the same length.

9. The workpiece curvature detection fixture according to claim 1, characterized in that: All the first strip guide portions (120) are evenly arranged around the centering portion (130), and the two first strip guide portions (120) located at both ends of the arrangement direction are perpendicular to each other.

10. The workpiece curvature detection fixture according to claim 1, characterized in that: It also includes two second positioning mechanisms (300). The base (100) has two second strip-shaped guide portions (150) on the supporting surface (110). The two second strip-shaped guide portions (150) are arranged at intervals around the centering portion (130). All the first strip-shaped guide portions (120) are located between the two second strip-shaped guide portions (150). The second strip-shaped guide portions (150) are parallel to the adjacent first strip-shaped guide portions (120). The two second positioning mechanisms (300) are aligned with the two second strip-shaped guide portions (150). In a corresponding manner, the second positioning mechanism (300) includes a straight segment positioning block (310) and a second locking structure (320). The straight segment positioning block (310) is movably disposed on the base (100) and can move along the corresponding second strip guide (150). The second locking structure (320) can lock or unlock the position of the corresponding straight segment positioning block (310) relative to the base (100). The straight segment positioning block (310) is provided with a straight segment stop (311), which is located on the support surface (110).

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