Caliper for measuring the outer profile of a tire mold ring

Abstract

This utility model discloses a caliper for measuring the outer contour of a tire mold steel ring. Belonging to the technical field of tire production equipment, it includes a main scale, a secondary scale, and a measuring rod. The main scale is fixedly connected to the measuring rod, and the secondary scale is fitted onto the measuring rod and can slide relative to it. The main scale has a main jaw, and the secondary scale has a secondary jaw fixedly mounted on it. Both the main and secondary jaws have a measuring positioning surface and a mounting surface. The measuring positioning surface is a plane that can mate with the end face of the steel ring for measurement positioning. The two mounting surfaces are opposite each other, and a measuring head is embedded in the mounting surface. The measuring head is a cylinder with its axis parallel to the measuring positioning surface and perpendicular to the measuring rod. The cylindrical surface of the measuring head protruding from the mounting surface forms a measuring contact surface, which contacts the outer circumferential surface of the steel ring during measurement. This allows for the measurement of the outer diameter of the end face of the tire mold steel ring with high accuracy.

Description

Technical Field

[0001] This utility model relates to the field of tire production equipment technology, specifically to a caliper for measuring the outer contour of a tire mold steel ring. Background Technology

[0002] Tire molds are key equipment for tire forming, and the steel rim is a component of the tire mold. The outer circumference of the steel rim partially forms the forming surface, which shapes the tire bead. The bead contacts the rim and attaches the tire to the rim. Therefore, the forming accuracy of the bead affects the reliability of the connection between the tire and the rim.

[0003] The forming surface structure of the steel ring is complex. It is usually connected to the end face of the steel ring by a conical surface, and the conical surface and the end face of the steel ring are transitioned by a rounded chamfer. Since the outer diameter of the end face of the steel ring does not have a corresponding edge, the existing measuring calipers have no measuring attachment point, so they cannot be measured accurately. In the existing technology, it is generally necessary to use a coordinate measuring machine or make a single-specification template measuring tool that conforms to the curve for measurement. These two methods are not only slow in measurement efficiency but also costly.

[0004] Therefore, a special caliper needs to be designed to measure the outer diameter of the steel ring. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a caliper for measuring the outer contour of a tire mold steel ring, which can directly measure the end face diameter of the steel ring with high accuracy and a fast and convenient measurement method.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a caliper for measuring the outer contour of a tire mold steel ring, used to measure the outer diameter of the end face of the steel ring; it includes a main scale, a secondary scale, and a measuring rod, wherein the main scale is fixedly connected to the measuring rod, and the secondary scale is fitted on the measuring rod and can slide relative to the measuring rod; the main scale is provided with a main jaw, and the secondary scale is fixedly installed with a secondary jaw, and both the main jaw and the secondary jaw are provided with a measuring positioning surface and a mounting surface; The measuring and positioning surface is a plane that can mate with the end face of the steel ring for measuring and positioning. The two mounting surfaces are opposite each other, and a measuring head is embedded in the mounting surfaces; The measuring head is a cylinder with its axis parallel to the measuring positioning surface and perpendicular to the measuring rod; the cylindrical surface of the measuring head that protrudes from the mounting surface forms a measuring contact surface, which contacts the outer circumference of the steel ring during measurement.

[0007] In the aforementioned caliper for measuring the outer contour of a tire mold steel rim, the auxiliary scale has a digital display screen.

[0008] In the aforementioned caliper for measuring the outer contour of a tire mold steel ring, the two mounting surfaces are distributed in a figure-eight shape.

[0009] In the aforementioned caliper for measuring the outer contour of a tire mold steel ring, the main jaw and the main scale, as well as the secondary jaw and the secondary scale, are detachably connected.

[0010] In the aforementioned caliper for measuring the outer contour of a tire mold steel ring, the main scale is fixedly connected to one end of the measuring rod.

[0011] In the aforementioned caliper for measuring the outer contour of a tire mold steel ring, the main jaw and the secondary jaw have a symmetrical structure.

[0012] In the aforementioned caliper for measuring the outer contour of a tire mold steel ring, the two measuring positioning surfaces located on the main jaw and the secondary jaw are in the same plane.

[0013] The beneficial effects of this utility model are as follows: Using calipers to measure the outer contour of the steel rim of a tire mold, the outer diameter of the steel rim end face can be measured with high accuracy and quick and convenient measurement method; In actual production, calipers can be used for steel rings of different sizes; The caliper has a simple structure and can be used to measure the outer diameter of the steel ring end face. Compared with coordinate measuring machine and single-specification template measuring tools that conform to the curve, it saves a lot of costs. Attached Figure Description

[0014] Figure 1 A schematic diagram of the calipers used to measure the outer contour of the steel rim in a tire mold. Figure 2 A schematic diagram showing the measurement of the outer contour of the steel rim in a tire mold using calipers. Figure 3 for Figure 2 A magnified view of a portion of region D.

[0015] In the picture: 10-Main scale; 20-Vertical scale; 21-Digital display screen; 30-Measuring rod; 40-Secondary jaw; 50-Main jaw; 51-Measuring positioning surface; 52-Mounting surface; 60-Measuring head; 61-Measuring contact surface; 62-Scale calibration reference point; 70-Steel ring; 71-Outer circumferential surface; 72-End face. Detailed Implementation

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] A caliper for measuring the outer contour of a tire mold steel rim; please refer to [reference needed]. Figures 1-3The system includes a main scale 10, a secondary scale 20, and a measuring rod 30. The main scale 10 is fixedly connected to the measuring rod 30, and their relative positions are fixed. The connection method can be a non-removable method such as welding, or a detachable connection method such as bolts or screws. Preferably, the main scale 10 is fixedly connected to one end of the measuring rod 30, which can effectively utilize the length of the measuring rod 30 to obtain a larger measuring range. The secondary scale 20 is fitted onto the measuring rod 30 and can slide relative to the measuring rod 30; that is, in the length direction of the measuring rod 30, the secondary scale 20 can slide closer to or away from the main scale 10, thereby allowing the measurement of the outer diameter of steel rings 70 of different sizes. The measuring rod 30 has graduation lines in the length direction, and the secondary scale 20 has a digital display screen 21 for direct reading. The use of graduation lines and the digital display screen 21 to display measurement results is prior art and will not be described in detail here.

[0018] To accommodate the measurement of the steel ring 70, the main scale 10 is equipped with a main jaw 50, and the auxiliary scale 20 is fixedly mounted with an auxiliary jaw 40. The main jaw 50 and the auxiliary jaw 40 are used in pairs, preferably in a symmetrical structure. During measurement, the main jaw 50 and the auxiliary jaw 40 are located at the two ends of the diameter of the outer circumference 71 of the steel ring 70, respectively. The main jaw 50 and the main scale 10, as well as the auxiliary jaw 40 and the auxiliary scale 20, are preferably assembled with screws or bolts for easy processing, replacement, adjustment, and maintenance.

[0019] The inner surfaces of the main jaw 50 and the auxiliary jaw 40 are concave on the side away from the measuring rod 30, resembling an inverted step. A measuring positioning surface 51 and a mounting surface 52 are formed within the concave area. The measuring positioning surface 51 extends horizontally, and the two measuring positioning surfaces 51 on the main jaw 50 and the auxiliary jaw 40 are preferably located in the same plane. During measurement, they work in conjunction with the end face 72 of the steel ring 70 to achieve measurement positioning. It is understood that when the end face 72 of the steel ring 70 is composed of different surfaces, the measuring positioning surfaces 51 of the main jaw 50 and the auxiliary jaw 40 can be set as needed and are not limited to being in the same plane. The mounting surface 52 is located on the side of the measuring positioning surface 51 away from the measuring rod 30, and the two mounting surfaces 52 are opposite each other. The mounting surface 52 connects to the measuring positioning surface 51 through an arc surface, which avoids the influence of processing stress on the accuracy of the measuring positioning surface 51 and the mounting surface 52.

[0020] The mounting surfaces 52 of the main jaw 50 and the auxiliary jaw 40 are opposite each other, and the edges of the mounting surfaces 52 away from the measuring positioning surface 51 extend outward at an angle greater than 90°, so that the two mounting surfaces 52 on the main jaw 50 and the auxiliary jaw 40 form a figure-eight shape. The outward expansion of the edges of the mounting surfaces 52 away from the measuring positioning surface 51 can avoid measurement interference with the outer peripheral surface 71 and enhance the applicability of the caliper.

[0021] A measuring head 60 is provided on the mounting surface 52. The measuring head 60 is cylindrical, and its axis is parallel to the measuring positioning surface 51 and perpendicular to the measuring rod 30. The measuring head 60 is partially embedded in the mounting surface 52, and the cylindrical surface of the portion protruding outward from the mounting surface 52 forms a measuring contact surface 61.

[0022] The measuring head 60 has the same assembly structure as the main jaw 50 and the auxiliary jaw 40. For example... Figure 3 As shown, taking the main jaw 50 and measuring head 60 as an example, a groove is machined on the mounting surface 52, and the cross-sectional shape of the groove is adapted to the shape of the measuring head 60. The measuring head 60 is embedded in the groove. In the circumferential direction, most of the measuring head 60 is inside the groove, and only a part of it protrudes out of the groove and protrudes from the mounting surface 52. The cylindrical surface of the measuring head 60 that protrudes from the mounting surface 52 is the measuring contact surface 61.

[0023] The measuring positioning surface 51 cooperates with the measuring contact surface 61 to complete the positioning and measurement of the steel ring 70. Specifically, the measuring contact surface 61 contacts and measures the outer peripheral surface 71 of the steel ring 70, and the end face 72 of the steel ring 70 serves as the measuring reference surface, which contacts the plane of the measuring positioning surface 51 to achieve axial positioning.

[0024] For example, such as Figure 2 and Figure 3 As shown, when measuring the outer diameter of the end face 72 of the steel rim 70, first press the measuring positioning surfaces 51 of the main jaw 50 and the auxiliary jaw 40 onto the end face 72 of the steel rim 70; then tighten the auxiliary ruler 20 so that the measuring heads 60 on the main jaw 50 and the auxiliary jaw 40 abut against the outer circumferential surface 71 of the steel rim 70; finally, while maintaining the measuring heads 60 of the main jaw 50 and the auxiliary jaw 40 in contact with the outer circumferential surface 71, gently swing the ruler to find the maximum value, and the outer diameter φA of the end face 72 can be measured. For the steel rim 70, the measurement of the outer diameter of the end face 72 can be further used to determine the tire's rim diameter. Therefore, it is preferable that the forming surface used for tire vulcanization molding is processed in one go to ensure the consistency of the accuracy of each surface, thereby ensuring the accuracy of the tire's rim diameter.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A caliper for measuring the outer contour of a tire mold steel rim, used to measure the outer diameter of the end face (72) of the steel rim (70); characterized in that, It includes a main scale (10), a secondary scale (20), and a measuring rod (30). The main scale (10) is fixedly connected to the measuring rod (30), and the secondary scale (20) is fitted onto the measuring rod (30) and can slide relative to the measuring rod (30). The main scale (10) is provided with a main jaw (50), and the secondary scale (20) is fixedly installed with a secondary jaw (40). Both the main jaw (50) and the secondary jaw (40) are provided with a measuring positioning surface (51) and a mounting surface (52). The measuring positioning surface (51) is a plane that can cooperate with the end face (72) of the steel ring (70) for measuring positioning; The two mounting surfaces (52) are opposite each other, and a measuring head (60) is embedded in the mounting surface (52); The measuring head (60) is a cylinder with its axis parallel to the measuring positioning surface (51) and perpendicular to the measuring rod (30). The cylindrical surface of the measuring head (60) protruding from the mounting surface (52) forms a measuring contact surface (61), which contacts the outer circumferential surface (71) of the steel ring (70) during measurement.

2. The caliper for measuring the outer contour of a tire mold steel rim according to claim 1, characterized in that, The secondary ruler (20) has a digital display screen (21).

3. The caliper for measuring the outer contour of a tire mold steel rim according to claim 1, characterized in that, The two mounting surfaces (52) are distributed in a figure-eight shape.

4. A caliper for measuring the outer contour of a tire mold steel rim according to claim 1, characterized in that, The main jaw (50) and the main scale (10), as well as the secondary jaw (40) and the secondary scale (20), are detachably connected.

5. A caliper for measuring the outer contour of a tire mold steel rim according to claim 1, characterized in that, The main ruler (10) is fixedly connected to one end of the measuring rod (30).

6. A caliper for measuring the outer contour of a tire mold steel rim according to claim 1, characterized in that, The main jaw (50) and the secondary jaw (40) are symmetrical structures.

7. A caliper for measuring the outer contour of a tire mold steel rim according to claim 1, characterized in that, The two measuring and positioning surfaces (51) located on the main jaw (50) and the secondary jaw (40) are in the same plane.

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