Detection tool for annular workpiece

Abstract

The utility model relates to a detection tool for an annular workpiece. The detection tool comprises a bracket, an inclined bottom plate, a positioning piece, a universal gauge stand and a detection gauge, the inclined bottom plate is fixed to the base, a plurality of connecting parts are arranged on the surface of the inclined bottom plate and arranged in two rows, the two rows of connecting parts are symmetrical about the first center line of the inclined bottom plate, and the first center line passes through the midpoints of the upper end and the lower end of the inclined bottom plate. The included angle between the straight line where each row of connecting parts is located and the first center line of the surface of the inclined bottom plate is an acute angle, and the connecting parts in one row are aligned with the connecting parts in the other row one by one in the horizontal direction; the positioning piece is provided with an arc surface in sliding contact with a to-be-measured surface of the annular workpiece; the two positioning pieces are detachably and fixedly mounted on the two symmetrical connecting parts respectively; the universal gauge stand is detachably and fixedly arranged on the inclined bottom plate; and the detection meter is fixedly connected with the universal meter seat through the universal adjusting arm. The structure is simple, the operation is convenient, and the roundness and parallelism of an annular workpiece can be conveniently detected.

Description

Technical Field

[0001] The utility model belongs to the technical field of workpiece detection tooling, and particularly relates to a detection tooling for an annular workpiece. Background Art

[0002] After machining annular workpieces, it is usually necessary to inspect the roundness and parallelism of the circumferential surface. Ordinary inspection tooling requires the annular workpiece to be clamped and fixed during use, and then its circumferential surface is inspected. Different workpieces also need to be clamped separately, which is complicated to operate. After clamping, the workpiece is easily deformed, resulting in low inspection accuracy and damage to the workpiece. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a detection fixture for an annular workpiece, which solves the technical problems of complicated clamping process and low detection accuracy when detecting the circumferential surface of the workpiece.

[0004] In order to solve the above problems, the technical solution of the present invention is: a detection tool for annular workpieces, comprising:

[0005] Bracket;

[0006] The inclined bottom plate is fixed to the base, and a plurality of connecting portions are provided on the surface of the inclined bottom plate. The plurality of connecting portions are arranged in two rows. The connecting portions of the two rows are symmetrical about a first center line of the inclined bottom plate, and the first center line passes through the midpoints of the upper and lower ends of the inclined bottom plate. The angle between the straight line on which the connecting portions of each row are located and the first center line of the surface of the inclined bottom plate is an acute angle, and the connecting portions of one row are aligned one by one with the connecting portions of the other row in the horizontal direction.

[0007] A positioning member having an arc surface in sliding contact with the surface of the annular workpiece to be measured; there are two positioning members, each of which is detachably fixedly mounted on two symmetrical connecting portions;

[0008] Universal table seat, detachable and fixed on the inclined bottom plate;

[0009] The detection table has a detection rod, which is used for sliding contact with the surface to be measured of the workpiece to detect roundness; the detection table is installed on a universal adjustment arm.

[0010] Optionally, the connecting portion is a connecting recess or a connecting protrusion.

[0011] Optionally, the connecting portion is a circular hole.

[0012] Optionally, the universal meter base is magnetically fixed to the inclined bottom plate.

[0013] Optionally, the connecting portions of each row gradually move away from the first center line from top to bottom.

[0014] Optionally, the positioning member includes a positioning column and a bearing rotatably disposed on the positioning column, and the arc surface is the outer peripheral wall of the bearing.

[0015] Optionally, the axis of the arc surface on the positioning member is perpendicular to the surface of the inclined bottom plate.

[0016] Optionally, an elastic resistance device is provided on the upper surface of the inclined bottom plate, and the elastic resistance device is used for slidingly resisting the back surface of the surface to be measured of the workpiece.

[0017] Optionally, the elastic resistance device includes:

[0018] A fixed seat having a limiting groove;

[0019] The Y-shaped interference rod includes a middle rod and two symmetrical oblique interference rods. The middle rod is slidably limited in the limit groove, and the ends of the oblique interference rods are rotatably provided with rollers that slide against the back side of the surface to be measured on the workpiece;

[0020] One end of the spring contacts the inner end wall of the limiting groove, and the other end of the spring contacts the end of the middle rod.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This utility model utilizes adjustable spacing between positioning elements on a tilted base plate to position the annular workpiece. A dial indicator or micrometer with a universal base is used to detect the roundness, parallelism, or perpendicularity of the annular workpiece's circumferential surface. The utility model features a simple structure, convenient operation, and high detection accuracy. The distance between the tool's measuring positioning elements can be flexibly selected based on the workpiece's diameter range, and the spacing between the positioning elements can be flexibly selected based on the workpiece's size. This makes the tool more adaptable and convenient for measuring annular workpieces of varying diameters. When measuring the inner circumference of an annular workpiece, the workpiece is directly suspended from the two positioning elements, eliminating the need for external fixation. Measurements are made by the workpiece's natural gravity, minimizing clamping errors during external fixation, errors generated during rotation, and damage to the workpiece caused by clamping. The roller and needle bearings are more labor-efficient and smoother to install and rotate, offering convenient and labor-saving operation, and can detect linear changes in workpiece size. Workpieces of similar specifications can use positioning elements in the same position, improving detection efficiency. No clamping is required, allowing for immediate measurement and batch operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the detection tool in the embodiment;

[0024] Figure 2 This is a schematic diagram of the installation of the elastic resistance device in the embodiment;

[0025] Figure 3 Schematic diagram of the structure of the elastic resistance device in the embodiment.

[0026] Figure numerals: 1. bracket; 2. inclined base plate; 21. connecting part; 22. first center line; 3. positioning member; 31. bearing; 32. positioning column; 4. universal meter seat; 5. detection meter; 51. detection rod; 6. universal adjustment arm; 7. elastic interference device; 71. fixing seat; 72. Y-shaped interference rod; 721. intermediate rod; 722. oblique interference rod; 723. roller; 73. spring; 8. workpiece. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0028] Example: Figure 1-Figure 3 As shown, this embodiment provides a detection tool for an annular workpiece, including a bracket 1, an inclined base plate 2, a positioning member 3, a universal meter seat 4 and a detection meter 5; the inclined base plate 2 is fixed on the base, and a plurality of connecting parts 21 are provided on the surface of the inclined base plate 2, and the plurality of connecting parts 21 are arranged in two rows, and the connecting parts 21 of the two rows are symmetrical about the first center line 22 of the inclined base plate 2, and the first center line 22 passes through the midpoint of the upper and lower ends of the inclined base plate 2, and the angle between the straight line where each row of connecting parts 21 is located and the first center line 22 of the surface of the inclined base plate 2 is an acute angle, and the connecting parts 21 of one row are aligned one by one with the connecting parts 21 of the other row in the horizontal direction; the positioning member 3 has an arc surface that is in sliding contact with the surface to be measured of the annular workpiece 8; the positioning member 3 has two, which are detachably fixedly mounted on two symmetrical connecting parts 21; the universal meter seat 4 is detachably fixedly mounted on the inclined base plate 2; the detection meter 5 has a detection rod 51, and the detection rod 51 is used to slide in contact with the surface to be measured of the workpiece 8 to detect roundness; the detection meter 5 is mounted on the universal adjustment arm 6.

[0029] Through the above arrangement, when it is necessary to detect the inner side surface of the annular workpiece 8, a suitable connecting part 21 is selected according to the size of the annular workpiece 8, and the two positioning parts 3 are respectively detachably fixedly installed on the two symmetrical connecting parts 21, and then the annular workpiece 8 is hung on the two positioning parts 3, so that the arc surface of the positioning part 3 is in sliding contact with the inner side surface of the annular workpiece 8, and the universal meter seat 4 is fixedly installed on the inclined base plate 2. The universal meter seat 4 is located in the area surrounded by the annular workpiece 8, and the detection end of the detection rod 51 of the detection meter 5 is in contact with the inner side surface of the annular workpiece 8. By manually rotating the annular workpiece 8, during the rotation process, it is ensured that the inner side surface of the annular workpiece 8 is always in sliding contact with the arc surface of the positioning part 3, and the reading of the detection meter 5 is read to measure the roundness of the inner side surface of the annular workpiece 8. When it is necessary to detect the outer side surface of the annular workpiece 8, the outer side surface of the annular workpiece 8 is manually controlled to contact the two positioning members 3, and the position of the universal meter seat 4 and the universal adjustment arm 6 are adjusted so that the detection end of the detection rod 51 of the detection meter 5 contacts the outer side surface of the annular workpiece 8. The annular workpiece 8 is manually rotated. During the rotation process, it is ensured that the outer side surface of the annular workpiece 8 and the arc surface of the positioning member 3 always slide and contact each other. The reading of the detection meter 5 is read to measure the roundness of the outer side surface of the annular workpiece 8. The structure is simple and easy to operate. By setting the universal meter seat 4 and the universal adjustment arm 6, the position adjustment of the detection meter 5 is more extensive and flexible, which is convenient for detecting the roundness of the circumferential plane of the annular workpiece 8, as well as the parallelism or perpendicularity of the circumferential plane. The detection fixture of this embodiment can be used to measure the roundness of the inner circle and outer circle of the hollow circular workpiece 8, as well as the parallelism or perpendicularity of the circumferential plane.

[0030] Optionally, the inspection gauge 5 may be a dial indicator, a micrometer, or the like.

[0031] Optionally, the inclined bottom plate 2 is detachably fixed to the bracket 1 by fasteners such as bolts. The bracket 1 adopts two parallel triangular brackets 1, and the inclined bottom plate 2 is fixed on the inclined surface of the bracket 1, which has good stability and simple structure.

[0032] Optionally, the angle between the inclined base plate 2 and the horizontal direction is 45 degrees. The dial indicator is a mechanical dial indicator; the angle between the lines containing the two rows of connecting portions 21 is 30 degrees. The width, height, and thickness of the inclined base plate 2 are 500mm*600mm*30mm.

[0033] In the annular workpiece detection fixture of this embodiment, the connecting portion 21 is a connecting recess or a connecting protrusion. The positioning member 3 can be fixed to the connecting portion 21 by a threaded connection.

[0034] In the annular workpiece inspection fixture of this embodiment, the connecting portion 21 is a circular hole. The structure is simple and the processing cost is low. Optionally, the spacing between adjacent circular holes in each row is consistent.

[0035] In the annular workpiece detection fixture of this embodiment, the universal meter base 4 is magnetically fixed on the inclined bottom plate 2, so that the position of the universal meter base 4 can be easily adjusted.

[0036] In this embodiment of the annular workpiece inspection tool, each row of connecting portions 21 gradually moves away from the first centerline 22 from top to bottom. For annular workpieces 8 with larger diameters, the positioning member 3 can be installed on the lower connecting portion 21, while for annular workpieces 8 with smaller diameters, the positioning member 3 can be installed on the upper connecting portion 21. This adapts to roundness inspection of workpieces 8 of various sizes.

[0037] In the annular workpiece inspection tool of this embodiment, the positioning member 3 includes a positioning post 32 and a bearing 31 rotatably mounted on the positioning post 32. The arcuate surface is the outer peripheral wall of the bearing 31. The contact between the bearing 31 and the workpiece 8 greatly reduces frictional resistance, making manual rotation labor-saving and efficient, and achieving high detection accuracy.

[0038] Optionally, the positioning column 32 is a cylinder; the bearing 31 is rotatably disposed on the outer periphery of the cylinder. Optionally, the bearing 31 is a high-density German INA bolt-type roller needle bearing 31 processed by bainite austempering technology, which is smoother when measuring the rotating workpiece 8.

[0039] In the annular workpiece inspection fixture of this embodiment, the axis of the upper arc surface of the positioning member 3 is perpendicular to the surface of the inclined base plate 2. This arrangement ensures that after the surface of the annular workpiece 8 and the arc surface of the positioning member 3 are aligned, the lower end surface of the annular workpiece 8 and the surface of the inclined base plate 2 are matched and aligned, thus limiting the position of the annular workpiece 8 and making manual rotation of the annular workpiece 8 easier and more efficient.

[0040] In the inspection tooling of the annular workpiece of this embodiment, when measuring the circumference and parallelism of the workpiece 8, the processed workpiece 8 selects a suitable positioning column spacing according to the size of the arc surface or diameter, and the workpiece 8 is hung on two symmetrical roller needle bearings 31. At this time, the center of gravity of the workpiece 8 is tilted downward and close to the plane of the inclined base plate 2. Then, the dial indicator or micrometer with a universal meter seat 4 is installed at the appropriate position of the part of the workpiece 8 to be measured and fixed. The dial indicator or micrometer uses a high sensitivity with a shock-proof design, and the detection head can rotate 180°, so that the work of measuring complex workpieces 8 is easier to achieve. Then, use both hands to evenly push the workpiece 8 to make a circular motion to read the measurement runout value on the dial indicator.

[0041] In the annular workpiece inspection fixture of this embodiment, an elastic abutment device 7 is provided on the upper surface of the inclined base plate 2. The elastic abutment device 7 is configured to slidably abut the back surface of the surface to be inspected of the workpiece 8. The elastic abutment device 7 cooperates with the arcuate surface of the positioning member 3 to clamp the annular workpiece 8, preventing the annular workpiece 8 from separating from the positioning member 3 during manual rotation, thereby ensuring the inspection accuracy of the annular workpiece 8.

[0042] In the inspection tooling of the annular workpiece of this embodiment, the elastic interference device 7 includes a fixed seat 71, a Y-shaped interference rod 72 and a spring 73; the fixed seat 71 has a limiting groove 711; the Y-shaped interference rod 72 includes an intermediate rod 721 and two symmetrical oblique interference rods 722, the intermediate rod 721 is slidably limited in the limiting groove 711, and the ends of the oblique interference rods 722 are both rotatably set to slide against the roller 723 on the back side of the surface to be measured on the workpiece 8; the spring 73, one end of which is in contact with the inner end wall of the limiting groove 711, and the other end of which is in contact with the end of the intermediate rod 721.

[0043] With the above arrangement, when in use, the Y-shaped interference rod 72 is pushed to overcome the force of the spring 73 and move in the limit groove 711 in the direction away from the positioning member 3, and then the surface to be measured of the annular workpiece 8 is slid into contact with the arc surface of the positioning member 3, and the external force on the Y-shaped interference rod 72 is removed. Under the action of the spring 73, the Y-shaped interference rod 72 is extended, so that the roller 723 is pressed against the back side of the surface to be measured on the annular workpiece 8, thereby sliding the annular workpiece 8 against the positioning member 3, avoiding the annular workpiece 8 from separating from the positioning member 3 during rotation. The use of two rollers 723 has a better limiting effect.

[0044] Optionally, the axis of the Y-shaped interference rod 72 and its moving direction are symmetrical about the first center line 22. This allows the annular workpiece 8 to be subjected to balanced forces and achieve high detection accuracy. The Y-shaped interference rod 72 can be located above or below the positioning member 3.

Claims

1. A tool for detecting annular workpieces, characterized in that: include: Bracket (1); The inclined bottom plate (2) is fixed on the base, and a plurality of connecting parts (21) are arranged on the surface of the inclined bottom plate (2). The plurality of connecting parts (21) are arranged in two rows, and the connecting parts (21) in the two rows are symmetrical about a first center line (22) of the inclined bottom plate (2). The first center line (22) passes through the midpoints of the upper and lower ends of the inclined bottom plate (2). The angle between the straight line where the connecting parts (21) in each row are located and the first center line (22) on the surface of the inclined bottom plate (2) is an acute angle, and the connecting parts (21) in one row are aligned one by one with the connecting parts (21) in another row in the horizontal direction. A positioning member (3), the positioning member (3) having an arc surface that is in sliding contact with the surface to be measured of the annular workpiece (8); the positioning member (3) has two members that are detachably fixedly mounted on two symmetrical connecting portions (21); A universal table seat (4) is detachably fixed on the inclined bottom plate (2) and has a universal adjustment arm (6); The detection table (5) has a detection rod (51), and the detection rod (51) is used for sliding contact with the surface to be tested of the workpiece (8) to detect the roundness; the detection table (5) is installed on the universal adjustment arm (6).

2. The annular workpiece detection tool according to claim 1, characterized in that: The connecting portion (21) is a connecting depression or a connecting protrusion.

3. The annular workpiece detection tool according to claim 1, characterized in that: The connecting portion (21) is a circular hole.

4. The detection tool for annular workpiece according to claim 1, characterized in that: The universal meter seat (4) is fixed on the inclined bottom plate (2) by magnetic attraction.

5. The annular workpiece detection tool according to claim 1, characterized in that: The connection parts (21) of each row gradually move away from the first center line (22) from top to bottom.

6. The annular workpiece detection tool according to claim 1, characterized in that: The positioning member (3) comprises a positioning column (32) and a bearing (31) rotatably arranged on the positioning column, and the arc surface is the outer peripheral wall of the bearing (31).

7. The annular workpiece detection tool according to claim 1, characterized in that: The axis of the arc surface on the positioning member (3) is perpendicular to the surface of the inclined bottom plate (2).

8. The annular workpiece detection tool according to claim 1, characterized in that: An elastic abutment device (7) is arranged on the upper surface of the inclined bottom plate (2), and the elastic abutment device (7) is used for slidingly abutting against the back side of the surface to be measured of the workpiece (8).

9. The annular workpiece detection tool according to claim 8, characterized in that: The elastic resistance device (7) comprises: A fixing seat (71) having a limiting groove (711); A Y-shaped abutment rod (72), comprising an intermediate rod (721) and two symmetrical oblique abutment rods (722), wherein the intermediate rod (721) is slidably limited in the limiting groove (711), and the ends of the oblique abutment rods (722) are rotatably provided with rollers (723) that are slidably in contact with the back side of the surface to be measured on the workpiece (8); One end of the spring (73) abuts against the inner end wall of the limiting groove (711), and the other end of the spring (73) abuts against the end of the intermediate rod (721).

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