Complex curved surface profile tolerance detection tool

Abstract

The utility model belongs to the technical field of tool clamps, and particularly relates to a complex curved surface profile tolerance detection tool which comprises a base, a positioning column is detachably arranged in the center of the top of the base, a mounting seat is fixedly connected to the edge of the top of the base, and a positioning pin is detachably arranged on the side, away from the mounting seat, of the top of the base. A limiting groove is formed in the side, facing the positioning column, of the top of the mounting base, a vertical limiting mechanism is detachably arranged at the top of the positioning column and comprises a connecting column, a mounting ring is fixedly connected to the outer side of the middle of the connecting column, and a plurality of mounting plates are fixedly connected to the outer side wall of the mounting ring around the connecting column. The beneficial effects of the utility model are that through the arrangement of the positioning column, the positioning pin, the limiting groove and the vertical limiting mechanism, the limiting of an irregular-shaped workpiece with a complex curved surface can be realized, the displacement of the workpiece in the vertical direction during detection can be effectively avoided, and the detection precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically to a tooling for detecting the contour of complex curved surfaces. Background Technology

[0002] Contour measurement fixtures are important tools in industrial manufacturing to ensure the accuracy of curved or curved shapes. Their design needs to be combined with the characteristics of the workpiece being measured, tolerance requirements, and the inspection scenario. They achieve efficient and accurate measurement through technologies such as contour positioning, go / no-go gauge inspection, and intelligent sensors.

[0003] A contour gauge, such as one disclosed in CN215338127U, includes a base plate, a pad plate, a positioning plate, a positioning pin, and a workpiece clamping block. The pad plate is mounted on the base plate, and a rotating shaft is mounted on the pad plate. A copper sleeve is installed between the rotating shaft and the pad plate. The positioning plate is rotatably mounted on the rotating shaft on the upper part of the pad plate. A positioning pin is installed at the upper end of the rotating shaft, forming a space for placing the workpiece between the positioning pin and the positioning plate. The workpiece clamping block is rotatably mounted on the positioning pin or the positioning plate to position the workpiece. A measuring mechanism is mounted on the base plate near the positioning plate.

[0004] However, the aforementioned contour gauge can only inspect regular cylindrical workpieces. It is difficult to inspect irregularly shaped workpieces with complex curved surfaces. Furthermore, it is difficult to limit the vertical movement of irregularly shaped workpieces. During inspection, the probe of the measuring instrument is prone to displacement of the workpiece in the vertical direction, which affects the inspection accuracy. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing contour detection fixtures are not convenient for limiting irregularly shaped workpieces and have low detection accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A complex curved surface contour inspection fixture includes a base, a positioning post detachably disposed at the top center of the base, a mounting seat fixedly connected to the top edge of the base, a positioning pin detachably disposed on the top side of the base away from the mounting seat, a limit groove formed on the top side of the mounting seat facing the positioning post, a vertical limiting mechanism detachably disposed on the top of the positioning post, the vertical limiting mechanism including a connecting post, a mounting ring fixedly connected to the outer side of the middle part of the connecting post, and several mounting plates fixedly connected around the outer wall of the mounting ring around the connecting post, with a pressure block slidably connected to the bottom of each mounting plate.

[0008] Furthermore, the connecting column and the positioning column are coaxially arranged, and the mounting plate is perpendicular to the outer wall of the mounting ring.

[0009] Furthermore, a handle is fixedly connected to the top of the connecting column, and a threaded portion is provided on the lower part of the outer side wall of the connecting column. The connecting column is threadedly connected to the positioning column through the threaded portion, and a rolling roller is rotatably connected to the bottom of the pressure block along the tangential direction of the connecting column.

[0010] Furthermore, an adjustment mechanism is provided between the pressure block and the upper part of the outer side wall of the connecting column. The adjustment mechanism includes an upper threaded part, which is provided on the upper part of the outer side wall of the connecting column. An adjustment nut is threadedly connected to the outer side of the upper threaded part, and a movable ring is rotatably connected to the bottom of the adjustment nut.

[0011] Furthermore, the outer wall of the movable ring is fixedly connected to a number of connecting seats around the connecting column. The number and position of the connecting seats match the mounting plate, and a connecting rod is hinged between the connecting seats and the pressure block.

[0012] Furthermore, a number of top posts are fixedly connected to the top of the base.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The present invention provides a complex curved surface contour inspection fixture, which, by setting a positioning post, a positioning pin, a limiting groove and a vertical limiting mechanism, can realize the limiting of irregularly shaped workpieces with complex curved surfaces, effectively avoid the vertical displacement of the workpiece during inspection and improve the inspection accuracy.

[0015] 2. The present invention provides a complex curved surface contour detection fixture, which, by setting an adjustment mechanism, can limit the movement of workpieces with different hole diameters, effectively improving the applicability of the fixture. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall assembly structure of a complex curved surface contour detection fixture according to the present invention.

[0017] Figure 2 This is a schematic diagram of a vertical limiting mechanism for a complex curved surface contour detection fixture according to the present invention.

[0018] Figure 3 This is a top view schematic diagram of a complex curved surface contour detection fixture according to the present invention.

[0019] Figure 4 This is a front view schematic diagram of a complex curved surface contour detection fixture according to the present invention.

[0020] In the diagram: 1. Base; 2. Mounting seat; 3. Limiting groove; 4. Positioning post; 5. Positioning pin; 6. Vertical limiting mechanism; 601. Connecting post; 602. Lower threaded part; 603. Mounting ring; 604. Pressure block; 605. Adjusting mechanism; 6051. Upper threaded part; 6052. Adjusting nut; 6053. Movable ring; 6054. Connecting seat; 6055. Connecting rod; 606. Handle; 607. Mounting plate; 608. Roller; 7. Top post. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3The complex curved surface contour inspection fixture of this embodiment includes a base 1. A positioning post 4 is detachably provided at the top center of the base 1. A mounting seat 2 is fixedly connected to the top edge of the base 1. A positioning pin 5 is detachably provided on the top side of the base 1 away from the mounting seat 2 for positioning the workpiece. A limiting groove 3 is formed on the top side of the mounting seat 2 facing the positioning post 4 for limiting the edge contour of the workpiece. A vertical limiting mechanism 6 is detachably provided on the top of the positioning post 4 for limiting the workpiece in the vertical direction. The vertical limiting mechanism 6 includes a connecting post 601, and the middle outer side of the connecting post 601... A mounting ring 603 is fixedly connected, and several mounting plates 607 are fixedly connected around the outer wall of the mounting ring 603 around the connecting post 601. A pressure block 604 is slidably connected to the bottom of each mounting plate 607. The connecting post 601 is coaxially arranged with the positioning post 4, and the mounting plates 607 are perpendicular to the outer wall of the mounting ring 603. A handle 606 is fixedly connected to the top of the connecting post 601, and a threaded part 602 is provided on the lower part of the outer wall of the connecting post 601. The connecting post 601 is threadedly connected to the positioning post 4 through the threaded part 602. A rolling roller 608 is rotatably connected to the bottom of the pressure block 604 along the tangential direction of the connecting post 601. During installation, select the corresponding positioning pin 4 according to the positioning holes of the workpiece and insert it into the top of the base 1. Then, remove the vertical limiting mechanism 6 on the top of the positioning pin 4. According to the contour of the workpiece, install the protrusion of the workpiece facing the bottom of the limiting groove 3 on the top of the base 1. During installation, match the positioning pin 4 and positioning pin 5 with the positioning holes on the surface of the workpiece to achieve horizontal positioning of the workpiece. Then, limit the workpiece vertically through the vertical limiting mechanism 6. When limiting, first adjust the position of the pressure block 604 at the bottom of the mounting plate 607 so that the pressure block 604 is directly above the protruding ring on the edge of the positioning hole of the workpiece. Then, turn the handle 606 to make the connecting pin 601 and its bottom threaded part 602 start to rotate. When the bottom threaded part 602 rotates, it enters the groove. The threaded positioning post 4 causes the connecting post 601 to move downwards. When the connecting post 601 moves, it drives the mounting ring 603 and mounting plate 607 in the middle to move downwards, causing the pressure block 604 to move downwards until the bottom of the pressure block 604 abuts against the convex ring on the edge of the workpiece positioning hole. The rolling roller 608 can prevent the bottom of the pressure block 604 from scratching the surface of the workpiece when it contacts the workpiece, thus achieving vertical positioning of the workpiece. This achieves positioning of irregularly shaped workpieces with complex curved surfaces, effectively preventing vertical displacement of the workpiece during inspection and improving inspection accuracy. Finally, the probe of the inspection instrument is inserted into the gap between the limiting groove 3 and the side wall of the workpiece, so that the probe surrounds the side wall of the workpiece to inspect the contour of the workpiece.

[0023] Please see Figure 4An adjustment mechanism 605 is provided between the pressure block 604 and the upper part of the outer side wall of the connecting column 601. The adjustment mechanism 605 includes an upper threaded part 6051, which is located on the upper part of the outer side wall of the connecting column 601. An adjusting nut 6052 is threaded to the outer side of the upper threaded part 6051. A movable ring 6053 is rotatably connected to the bottom of the adjusting nut 6052. Several connecting seats 6054 are fixedly connected around the outer side wall of the movable ring 6053 around the connecting column 601. The number and position of the connecting seats 6054 match those of the mounting plate 607. A connecting rod 6055 is hinged between the opposing connecting seats 6054 and the pressure block 604. When adjusting the position of the pressure block 604, rotate the adjusting nut 6052, causing the adjusting nut 6052 to rise and fall on the outside of the upper threaded part 6051. When the adjusting nut 6052 moves, it drives the movable ring 6053 connected to its bottom to move accordingly. When the movable ring 6053 moves, it drives the connecting seat 6054 on its outer side wall to move accordingly. As a result, the connecting rod 6055, which is hinged to it, starts to rotate around the connecting seat 6054. When the connecting rod 6055 rotates, it drives the pressure block 604, which is hinged to its other end, to start to slide on the bottom of the mounting plate 607, thereby realizing the synchronous adjustment of the position of the pressure block 604.

[0024] Several top posts 7 are fixedly connected to the top of the base 1. The top posts 7 can support the bottom of the workpiece, keeping the workpiece in a horizontal position.

[0025] Working principle: During installation, select the corresponding positioning pin 4 according to the positioning holes of the workpiece and insert it into the top of the base 1. Then, remove the vertical limiting mechanism 6 on the top of the positioning pin 4. According to the contour of the workpiece, install the protrusion of the workpiece facing the bottom of the limiting groove 3 on the top of the base 1. During installation, make the positioning pin 4 and positioning pin 5 match the positioning holes on the surface of the workpiece to achieve horizontal positioning of the workpiece. Then, the vertical limiting mechanism 6 limits the workpiece vertically. When limiting, first adjust the position of the pressure block 604 at the bottom of the mounting plate 607. When adjusting, rotate the adjusting nut 6052 so that the adjusting nut 6052 moves up and down outside the upper thread 6051. When the adjusting nut 6052 moves, it drives the movable ring 6053 connected to its bottom to move. When the movable ring 6053 moves, it drives the connecting seat 6054 on its outer side wall to move. Thus, the connecting rod 6055, which is hinged to it, starts to rotate around the connecting seat 6054. When the connecting rod 6055 rotates, it drives the pressure block 604, which is hinged to its other end, to move. The device slides from the bottom of the mounting plate 607 until the pressure block 604 is directly above the convex ring at the edge of the workpiece positioning hole. Then, the handle 606 is rotated, causing the connecting post 601 and its bottom threaded portion 602 to rotate. As the threaded portion 602 rotates, it enters the positioning post 4, which is threaded to it, causing the connecting post 601 to move downward. When the connecting post 601 moves, it drives the mounting ring 603 and the mounting plate 607 in the middle to move downward, causing the pressure block 604 to move downward until the bottom of the pressure block 604 abuts against the convex ring at the edge of the workpiece positioning hole. The rolling roller 608 can prevent the bottom of the pressure block 604 from scratching the surface of the workpiece when it contacts the workpiece, thus achieving vertical positioning of the workpiece. This achieves positioning of irregularly shaped workpieces with complex curved surfaces, effectively preventing vertical displacement of the workpiece during inspection and improving inspection accuracy. Finally, the probe of the inspection instrument is inserted into the gap between the limiting groove 3 and the side wall of the workpiece, so that the probe surrounds the side wall of the workpiece to inspect the contour of the workpiece.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A fixture for detecting the profile of complex curved surfaces, characterized in that: The device includes a base (1), a positioning post (4) is detachably provided at the top center of the base (1), a mounting seat (2) is fixedly connected to the top edge of the base (1), a positioning pin (5) is detachably provided on the top side of the base (1) away from the mounting seat (2), a limiting groove (3) is opened on the top side of the mounting seat (2) facing the positioning post (4), a vertical limiting mechanism (6) is detachably provided on the top of the positioning post (4), the vertical limiting mechanism (6) includes a connecting post (601), an mounting ring (603) is fixedly connected to the outer side of the middle part of the connecting post (601), and a number of mounting plates (607) are fixedly connected around the outer wall of the mounting ring (603) around the connecting post (601), and a pressure block (604) is slidably connected to the bottom of each mounting plate (607).

2. The complex curved surface contour detection fixture according to claim 1, characterized in that: The connecting column (601) is coaxially arranged with the positioning column (4), and the mounting plate (607) is perpendicular to the outer wall of the mounting ring (603).

3. The complex curved surface contour detection fixture according to claim 1, characterized in that: The top of the connecting column (601) is fixedly connected to a handle (606), and the lower part of the outer side wall of the connecting column (601) is provided with a lower threaded part (602). The connecting column (601) is threadedly connected to the positioning column (4) through the lower threaded part (602). The bottom of the pressure block (604) is rotatably connected to a rolling roller (608) along the tangential direction of the connecting column (601).

4. The complex curved surface contour detection fixture according to claim 2, characterized in that: An adjustment mechanism (605) is provided between the pressure block (604) and the upper part of the outer side wall of the connecting column (601). The adjustment mechanism (605) includes an upper threaded part (6051), which is located on the upper part of the outer side wall of the connecting column (601). An adjustment nut (6052) is threaded to the outer side of the upper threaded part (6051), and a movable ring (6053) is rotatably connected to the bottom of the adjustment nut (6052).

5. The complex curved surface contour detection fixture according to claim 4, characterized in that: The outer wall of the movable ring (6053) is fixedly connected to a number of connecting seats (6054) around the connecting column (601). The number and position of the connecting seats (6054) match those of the mounting plate (607). A connecting rod (6055) is hinged between the connecting seats (6054) and the pressure block (604).

6. The complex curved surface contour detection fixture according to claim 1, characterized in that: The top of the base (1) is fixedly connected to several top columns (7).

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