Auxiliary measuring device for searching points of circle center

Abstract

The utility model provides a circle center searching auxiliary measuring device which comprises a ruler, a right caliper, a left caliper, a marking ruler, a synchronous gear, a fixing block, a locking bolt and a bearing. The device can directly position the circle center and take the circle center as a measurement reference, thereby reducing personal errors, satisfying diameter measurement of cylindrical parts or tools in a certain range, especially for pipe products, realizing circle center visualization, ensuring authenticity and reliability of product detection data, and improving product quality. The distance measurement between a cylindrical part or a tool and other parts is facilitated, meanwhile, higher measurement precision is guaranteed, the efficiency and reliability of product detection are improved, and repeated measurement caused by non-uniform data is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of part center calibration and distance measurement, and particularly relates to an auxiliary measuring device for center point searching of a circle center. Background Art

[0002] Cylindrical workpieces such as various pipes, shafts, etc. are commonly used in many fields such as automobiles, cableway construction, transportation pipelines, and tooling manufacturing. The diversification of their functions endows them with important roles. Taking the welding tooling used in vehicle manufacturing as an example, in the welding of vehicles and their components, due to welding deformation, it is often necessary to assist with tooling to ensure that the welding dimensions meet the design requirements. In vehicle welding, parts with holes account for a relatively large proportion, and it is necessary to cooperate with shaft-type tooling for welding. During the preparation process of shaft-type tooling, there are manufacturing tolerances and assembly tolerances. Therefore, after the tooling is manufactured and installed as required, it is necessary to conduct dimensional identification according to the design requirements, and it can be used only after passing the identification. During the identification process, the relative position and relative size of the installation shaft of the tooling are important parts of the identification. Although micrometers and tape measures are commonly used identification tools, when measuring the shaft, the maximum or minimum distance between the two is often measured, and then the radius is calculated to determine the center distance, or the distance between the centers of the circles and the edges is directly measured visually. The human error is relatively large, which easily causes the identification result to be distorted, resulting in problems such as unqualified product welding accuracy during subsequent use, thus causing rework or even scrapping, and increasing the manufacturing cycle and production cost of the product. In order to improve the authenticity of measurement data and the reliability of identification results during the identification of shaft-type tooling, it is particularly important to design an auxiliary measuring device for center point searching of a circle center. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] The utility model provides an auxiliary measuring device for center point searching of a circle center to solve the technical problem of how to effectively and accurately locate the center of a circle and improve the detection efficiency and reliability of products.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the utility model provides an auxiliary measuring device for center point searching of a circle center, which includes a scale, a right caliper, a left caliper, a marking ruler, a synchronous gear, a fixing block, a locking bolt, and a bearing; among them,

[0007] The scale is marked with scale lines, and the inside of the scale is provided with a caliper sliding groove, and the upper I-shaped guide rail and the lower I-shaped guide rail are respectively processed in the caliper sliding groove, which are used as the slide rails of the right caliper and the left caliper;

[0008] The bearing is installed on the side wall of the caliper sliding groove of the scale, and the center of the bearing is aligned with the zero scale of the scale; the protruding shaft of the synchronous gear is installed in the bearing, and through the meshing with the straight racks in the left caliper and the right caliper, the equal-distance reverse sliding of the left caliper and the right caliper is realized;

[0009] The right caliper includes a right sliding part and a right caliper part; among them, the right caliper part is installed on the front side of the sliding part, the upper part of the right sliding part is processed into a chute structure, the lower part of the right sliding part is processed into a straight rack structure, the right sliding part is installed on the upper I-shaped guide rail of the scale through the chute structure, and the straight rack structure meshes with the lower end of the synchronous gear; through the movement of the right sliding part, the right caliper part is driven to slide relative to the scale lines on the scale;

[0010] The left caliper includes a left sliding part and a left caliper part; among them, the left caliper part is installed on the front side of the sliding part, the lower part of the left sliding part is processed into a chute structure, the upper part of the left sliding part is processed into a straight rack structure, the left sliding part is installed on the lower I-shaped guide rail of the scale through the chute structure, and the straight rack structure meshes with the upper end of the synchronous gear; through the movement of the right caliper, the left caliper is driven by the synchronous gear to perform equal-distance reverse sliding synchronously;

[0011] The fixed block is installed above the scale, and the center of the fixed block is aligned with the zero scale of the scale; a marking ruler sliding groove with an axis perpendicular to the scale and a threaded hole perpendicular to the marking ruler sliding groove are provided on the fixed block. The marking ruler can slide up and down in the marking ruler sliding groove and the marking ruler is fixed by a locking bolt penetrating into the threaded hole; scale lines are marked on the marking ruler, and a cross alignment point is provided at the bottom of the marking ruler for center point searching and marking.

[0012] Furthermore, the bearing is installed on the side wall of the caliper sliding groove of the scale by interference fit.

[0013] Furthermore, the right sliding part and the right caliper part of the right caliper adopt an integrated structure.

[0014] Furthermore, the right sliding part and the right caliper part of the left caliper adopt an integrated structure.

[0015] Furthermore, the angle gauge is installed above the scale.

[0016] Furthermore, the angle gauge adopts a magnetic angle gauge.

[0017] (III) Beneficial effects

[0018] The utility model provides a center point finding auxiliary measuring device, which includes a scale, a right caliper, a left caliper, a marking ruler, a synchronous gear, a fixing block, a locking bolt and a bearing. This device can directly locate the center point and use it as a measuring reference, thereby reducing human error. It can not only meet the diameter measurement of cylindrical parts or toolings within a certain range, especially for pipe products, but also realize the visualization of the center point, ensure the authenticity and reliability of product detection data, facilitate the distance measurement between cylindrical parts or toolings and other components, and at the same time ensure higher measurement accuracy, improve the efficiency and reliability of product detection, and avoid repeated measurements caused by inconsistent data. Brief Description of the Drawings

[0019] Figure 1 is the front view of the center point finding auxiliary measuring device of the utility model;

[0020] Figure 2 is the left view of the center point finding auxiliary measuring device of the utility model;

[0021] Figure 3 is the positive three-axis isometric drawing of the center point finding auxiliary measuring device of the utility model;

[0022] Figure 4 is the schematic diagram of the measuring method of the center point finding auxiliary measuring device of the utility model;

[0023] Figure 5 is Figure 4 the partial enlarged view of.

[0024] In the figure: 1-scale; 2-right caliper; 3-left caliper; 4-marking ruler; 5-synchronous gear; 6-fixing block; 7-locking bolt; 8-magnetic angle gauge; 9-bearing. Detailed Description of the Preferred Embodiment

[0025] To make the purpose, content and advantages of the utility model clearer, the following combines the drawings and embodiments to further describe the detailed implementation of the utility model in detail.

[0026] This embodiment provides a center point finding auxiliary measuring device, and its structure is as Figures 1 to 3 shown, mainly including a scale 1, a right caliper 2, a left caliper 3, a marking ruler 4, a synchronous gear 5, a fixing block 6, a locking bolt 7, a magnetic angle gauge 8 and a bearing 9.

[0027] The scale 1 is marked with scale lines, and the inside of the scale 1 is provided with a caliper sliding groove, and the upper I-shaped guide rail and the lower I-shaped guide rail are respectively machined in the caliper sliding groove, and are used as the slide rails of the right caliper 2 and the left caliper 3 respectively.

[0028] The bearing 9 is installed on the side wall of the sliding groove of the caliper of the scale 1 by interference fit, and the center of the bearing 9 is aligned with the zero scale of the scale 1. The protruding shaft of the synchronous gear 5 is installed in the bearing 9, and by meshing with the straight racks in the left caliper 3 and the right caliper 2, the equal-distance reverse sliding of the left caliper 3 and the right caliper 2 is realized.

[0029] The right caliper 2 includes an integrally structured right sliding part and a right caliper part. Among them, the right caliper part is installed on the front side of the sliding part. The upper part of the right sliding part is processed into a chute structure, and the lower part of the right sliding part is processed into a straight rack structure. The right sliding part is installed on the upper I-shaped guide rail of the scale 1 through the chute structure, and the straight rack structure meshes with the lower end of the synchronous gear 5. By moving the right sliding part, the right caliper part is driven to slide relative to the scale line on the scale 1.

[0030] The left caliper 3 includes an integrally structured left sliding part and a left caliper part. Among them, the left caliper part is installed on the front side of the sliding part. The lower part of the left sliding part is processed into a chute structure, and the upper part of the left sliding part is processed into a straight rack structure. The left sliding part is installed on the lower I-shaped guide rail of the scale 1 through the chute structure, and the straight rack structure meshes with the upper end of the synchronous gear 5. By moving the right caliper 2, the left caliper 3 is driven by the synchronous gear 5 to perform equal-distance reverse sliding synchronously.

[0031] The fixing block 6 is installed above the scale 1, and the center of the fixing block 6 is aligned with the zero scale of the scale 1. A marking ruler sliding groove perpendicular to the axis of the scale 1 and a threaded hole perpendicular to the marking ruler sliding groove are provided on the fixing block 6. The marking ruler 4 can slide up and down in the marking ruler sliding groove and is fixed by a locking bolt 7 inserted into the threaded hole. Scale lines are marked on the marking ruler 4, and a cross alignment point is provided at the bottom of the marking ruler 4 for center point searching and marking.

[0032] The magnetic angle gauge 8 is installed above the scale 1 and is used to adjust the scale 1 to realize center point searching in different scenarios such as non-horizontal or non-vertical situations.

[0033] The above center point searching auxiliary measuring device is used to measure the diameter of the circular tube, and the center of the circle is determined by the center point searching auxiliary measuring device, as Figure 4 shown, and the specific process is as follows:

[0034] 1. The starting states of the cross points of the left caliper 3, the right caliper 2, and the marking ruler 4 are all located at the zero scale; move the right caliper 2, and the straight rack structure of the right caliper 2 drives the synchronous gear 5 to rotate through the assembled bearing 9. Under the action of the synchronous gear 5, the straight rack structure of the left caliper 3 undergoes equal-distance reverse sliding with the right caliper 2;

[0035] 2. When the left caliper 3 and the right caliper 2 clamp the circular tube, the scale line pointed to by the right caliper 2 on the scale 1 is the outer radius of the circular tube;

[0036] 3. According to the scale line pointed by the right caliper 2, move the marking ruler 4 downward. When the scale line aligned with the upper edge of the fixed block 6 is the same as the scale line pointed by the right caliper 2, fix the marking ruler 4, the scale indicated by the right caliper 2 and the marking ruler 4 through the fastening bolt 7. As Figure 5 shown;

[0037] 4. At this time, the cross alignment point of the marking ruler 4 is aligned with the center of the circular tube, and the cross alignment point is the center position of the cylindrical workpiece.

[0038] According to the product requirements, the center point searching and auxiliary measuring device can be adjusted to a suitable angle (such as horizontal, 45° etc.) through the magnetic angle finder 8, and the cross alignment point rotates accordingly to meet the use requirements of measuring tools (such as tape measures).

[0039] The present invention quickly locates the center of the circle through the center point searching and auxiliary measuring device, so that when measuring the distance between pipes and the distance between pipes and other workpieces, the measurement can be directly carried out through the center of the circle, improving the measurement efficiency and the reliability of data.

[0040] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present utility model, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present utility model.

Claims

1. A center point finding auxiliary measuring device, characterized in that, The described center point finding auxiliary measuring device includes a scale, a right caliper, a left caliper, a marking ruler, a synchronous gear, a fixing block, a locking bolt and a bearing; among them, The scale is marked with scale lines. Inside the scale, there is a caliper sliding groove, and the upper I-shaped guide rail and the lower I-shaped guide rail are respectively machined in the caliper sliding groove, serving as the slide rails for the right caliper and the left caliper respectively; The bearing is installed on the side wall of the caliper sliding groove of the scale, and the center of the bearing is aligned with the zero scale of the scale; the protruding shaft of the synchronous gear is installed in the bearing, and through meshing with the straight racks in the left caliper and the right caliper, the equal-distance reverse sliding of the left caliper and the right caliper is realized; The right caliper includes a right sliding part and a right caliper part; among them, the right caliper part is installed on the front side of the sliding part. The upper part of the right sliding part is processed into a chute structure, and the lower part of the right sliding part is processed into a straight rack structure. The right sliding part is installed on the upper I-shaped guide rail of the scale through the chute structure, and the straight rack structure meshes with the lower end of the synchronous gear; through the movement of the right sliding part, the right caliper part is driven to slide relative to the scale lines on the scale; The left caliper includes a left sliding part and a left caliper part; among them, the left caliper part is installed on the front side of the sliding part. The lower part of the left sliding part is processed into a chute structure, and the upper part of the left sliding part is processed into a straight rack structure. The left sliding part is installed on the lower I-shaped guide rail of the scale through the chute structure, and the straight rack structure meshes with the upper end of the synchronous gear; through the movement of the right caliper, the left caliper is driven by the synchronous gear to slide synchronously and equally in the reverse direction; The fixing block is installed above the scale, and the center of the fixing block is aligned with the zero scale of the scale; on the fixing block, there is a marking ruler sliding groove with an axis perpendicular to the scale, and a threaded hole perpendicular to the marking ruler sliding groove. The marking ruler can slide up and down in the marking ruler sliding groove and is fixed by the locking bolt inserted into the threaded hole; the marking ruler is marked with scale lines, and a cross alignment point is provided at the bottom of the marking ruler for center point finding and marking.

2. The center point finding auxiliary measuring device according to claim 1, wherein, The bearing is installed on the side wall of the caliper sliding groove of the scale by interference fit.

3. The center point finding auxiliary measuring device according to claim 1, characterized in that, The right sliding part and the right caliper part of the right caliper adopt an integrated structure.

4. The center point finding auxiliary measuring device according to claim 1, wherein, The right sliding part and the right caliper part of the left caliper adopt an integrated structure.

5. The center point finding auxiliary measuring device according to claim 1, characterized in that, The angle gauge is installed above the scale.

6. The center point seeking auxiliary measuring device according to claim 5, characterized in that, The angle gauge adopts a magnetic adsorption angle gauge.

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