Device for measuring inner diameter of tire mold

Abstract

The invention provides a tire mold inner diameter measuring device which comprises a first substrate and two detection pieces, the two detection pieces are arranged on the two sides of the first substrate respectively, and each detection piece is used for detecting the distance between the detection piece and the inner wall of a to-be-tested tire mold in the extending direction of the first substrate; the first substrate is movably arranged along a first preset direction and a second preset direction, so that the center of the first substrate and the projection point of the axis of the to-be-tested tire mold on the plane where the first substrate is located coincide; the first base plate is movably arranged in the height direction of the tire mold to be tested, so that the detection pieces detect the distance between the inner walls, at different heights, of the tire mold to be tested and the detection pieces; wherein the first preset direction, the second preset direction and the height direction of the to-be-tested tire mold are vertically arranged in pairs. The tire mold inner diameter measuring device solves the problem that in the prior art, a tire mold inner diameter measuring device is low in measuring efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of tire mold detection, and in particular to a tire mold inner diameter measuring device. Background Art

[0002] Tire molds are key equipment in the vulcanization stage of the tire manufacturing process. The inner diameter processing accuracy determines the important properties of the produced tires, such as out-of-roundness, taper, and eccentricity. Therefore, the inner diameter size measurement and evaluation of new molds is required after purchase. At the same time, rubber and sulfide residues will be produced on the surface of the tire mold during tire production. Tire manufacturers need to clean the surface of the tire mold regularly, and different cleaning methods will affect the inner diameter size accuracy of the tire mold. Therefore, it is also necessary to regularly check the inner diameter measurement of the tire mold.

[0003] However, the common tire mold inner diameter measuring device can only simultaneously complete the inner diameter measurement of a single flap (upper flap or lower flap) of the tire mold, and cannot simultaneously complete the inner diameter measurement of the upper flap and the lower flap of the tire mold combination. Summary of the invention

[0004] The main purpose of the present invention is to provide a tire mold inner diameter measuring device to solve the problem of low measurement efficiency of the tire mold inner diameter measuring device in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a tire mold inner diameter measuring device, comprising: a first substrate and two detection members, the two detection members are respectively arranged on both sides of the first substrate, and each detection member is used to detect the distance between the detection member and the inner wall of the tire mold to be tested along the extension direction of the first substrate; the first substrate is movably arranged along a first preset direction and a second preset direction so that the center of the first substrate coincides with the projection point of the axis of the tire mold to be tested on the plane where the first substrate is located; the first substrate is movably arranged along the height direction of the tire mold to be tested so that each detection member detects the distance between the inner wall of the tire mold to be tested at different heights and the detection member; wherein the first preset direction, the second preset direction and the height direction of the tire mold to be tested are arranged perpendicular to each other.

[0006] Furthermore, the tire mold inner diameter measuring device also includes: a reference disk, the center of the reference disk coincides with the center of the first substrate, and the first substrate is rotatably arranged on the reference disk around the axis of the reference disk; the first substrate has a first detection position and a second detection position, when the first substrate is in the first detection position, the extension direction of the first substrate is perpendicular to the extension direction of the first substrate in the second detection position; the reference disk is movably arranged along the first preset direction and the second preset direction, so that when the first substrate is in the second detection position and the first detection position, the detection results of the two detection components are the same by adjusting the position of the reference disk in the first preset direction and the second preset direction.

[0007] Furthermore, the tire mold inner diameter measuring device also includes a support rod, which extends along the height direction of the tire mold to be tested, and a plurality of installation positions are arranged on the support rod. The reference plate can be movably passed through the support rod along the extension direction of the support rod so that the reference plate can be installed in any one of the plurality of installation positions; wherein the support rod can be movably arranged along a first preset direction and a second preset direction.

[0008] Furthermore, a first avoidance hole is provided at the center of the first substrate, a second avoidance hole is provided at the center of the reference disk, and the support rod passes through the first avoidance hole and the second avoidance hole so that the reference disk can be movably provided on the support rod.

[0009] Furthermore, the tire mold inner diameter measuring device also includes a limit rod, the extension direction of the limit rod is perpendicular to the extension direction of the support rod, the limit rod can be detachably installed at any one of a plurality of installation positions on the support rod, and the limit rod abuts against the axial end face of the reference plate to limit the reference plate.

[0010] Furthermore, the support rod is provided with a plurality of mounting holes, which are arranged at intervals along the extension direction of the support rod, and the plurality of mounting holes are arranged one-to-one correspondingly to the plurality of mounting positions, and the limit rod is detachably inserted into any one of the plurality of mounting holes.

[0011] Furthermore, the tire mold inner diameter measuring device also includes a second substrate, a third substrate and a fourth substrate, the support rod is arranged on the second substrate, the second substrate is movably arranged on the third substrate along the first preset direction, and the third substrate is movably arranged on the fourth substrate along the second preset direction.

[0012] Furthermore, a first guide rail extending along a second preset direction is provided on the fourth substrate, a first slide groove is provided at the bottom of the third substrate, and the first slide groove can be movably mounted on the first guide rail; a second guide rail extending along the first preset direction is provided on the third substrate, a second slide groove is provided at the bottom of the second substrate, and the second slide groove can be movably mounted on the second guide rail.

[0013] Furthermore, a first mounting hole is provided on the fourth substrate, a second mounting hole is provided on the third substrate, and a fastener is passed through the first mounting hole and the second mounting hole so that the fourth substrate and the third substrate can be detachably connected; a third mounting hole is provided on the third substrate, a fourth mounting hole is provided on the second substrate, and a fastener is passed through the third mounting hole and the fourth mounting hole so that the third substrate and the second substrate can be detachably connected.

[0014] Furthermore, the tire mold inner diameter measuring device also includes a display, and each detection component is communicatively connected to the display so that the display displays the detection result of the detection component.

[0015] By applying the technical solution of the present invention, a tire mold inner diameter measuring device includes a first substrate and two detection members, each of which is used to detect the distance between the detection member and the inner wall of the tire mold to be tested along the extension direction of the first substrate; by verifying whether the detection results of the two detection members are the same, it can be determined whether the center of the first substrate coincides with the projection point of the axis of the tire mold to be tested on the plane where the first substrate is located; when the detection results of the two detection members are different, the first substrate is moved along the first preset direction and the second preset direction to make the center of the first substrate coincide with the projection point of the axis of the tire mold to be tested on the plane where the first substrate is located, so as to complete the calibration of the tire mold inner diameter measuring device, thereby ensuring that the extension direction of the first substrate is the tire to be tested. The radial direction of the mold makes the sum of the detection result of a detection piece and the center distance from the detection piece to the first substrate equal to the radius of the tire mold to be tested; the first substrate moves along the height direction of the tire mold to be tested, so that each detection piece detects the distance between the inner wall of the tire mold to be tested at different heights and the detection piece, thereby obtaining the radius of the tire mold to be tested at different heights. Since the upper lobe and the lower lobe of the tire mold to be tested are stacked together along the axial direction of the tire mold to be tested, the measurement of the upper lobe and the lower lobe of the tire mold to be tested can be completed simultaneously only by moving the first substrate, without reinstalling and calibrating the tire mold inner diameter measuring device, thereby solving the problem of low measurement efficiency of the tire mold inner diameter measuring device in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram showing the assembly of a tire mold inner diameter measuring device according to the present invention and a tire mold to be tested;

[0018] Figure 2 A schematic structural diagram of a tire mold inner diameter measuring device (without the display instrument) according to the present invention is shown;

[0019] Figure 3 A schematic structural diagram of a fourth substrate of the tire mold inner diameter measuring device according to the present invention is shown;

[0020] Figure 4 The figure shows an assembly diagram of a tire mold inner diameter measuring device (without the display instrument) according to the present invention and a tire mold to be tested;

[0021] Figure 5 A schematic structural diagram of a second substrate of the tire mold inner diameter measuring device according to the present invention is shown;

[0022] Figure 6 It shows a schematic structural diagram of a first substrate, a detection member and a reference plate of a tire mold inner diameter measuring device according to the present invention;

[0023] Figure 7 A schematic structural diagram of a third substrate of the tire mold inner diameter measuring device according to the present invention is shown.

[0024] The above drawings include the following reference numerals:

[0025] 1. tire mold to be tested; 10. first substrate; 11. detection member; 20. reference plate; 30. support rod; 40. limit rod; 50. second substrate; 60. third substrate; 70. fourth substrate; 12. first avoidance hole; 71. first guide rail; 62. second guide rail; 51. second slide groove; 72. first mounting hole; 64. third mounting hole; 90. display; 111. left detection member; 112. right detection member. DETAILED DESCRIPTION

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] Please refer to Figures 1 to 7 The present invention provides a tire mold inner diameter measuring device, comprising: a first substrate 10 and two detection members 11, the two detection members 11 are respectively arranged on both sides of the first substrate 10, and each detection member 11 is used to detect the distance between the detection member 11 and the inner wall of the tire mold 1 to be tested along the extension direction of the first substrate 10; the first substrate 10 is movably arranged along a first preset direction and a second preset direction, so that the center of the first substrate 10 coincides with the projection point of the axis of the tire mold 1 to be tested on the plane where the first substrate 10 is located; the first substrate 10 is movably arranged along the height direction of the tire mold 1 to be tested, so that each detection member 11 detects the distance between the inner wall of the tire mold 1 to be tested at different heights and the detection member 11; wherein the first preset direction, the second preset direction and the height direction of the tire mold 1 to be tested are arranged perpendicular to each other.

[0030] The tire mold inner diameter measuring device of the present invention comprises a first substrate 10 and two detection members 11, each detection member 11 is used to detect the distance between the detection member 11 and the inner wall of the tire mold 1 to be tested along the extension direction of the first substrate 10; by verifying whether the detection results of the two detection members 11 are the same, it can be determined whether the center of the first substrate 10 coincides with the projection point of the axis of the tire mold 1 to be tested on the plane where the first substrate 10 is located; when the detection results of the two detection members 11 are different, the first substrate 10 is moved along the first preset direction and the second preset direction so that the center of the first substrate 10 coincides with the projection point of the axis of the tire mold 1 to be tested on the plane where the first substrate 10 is located, so as to complete the calibration work of the tire mold inner diameter measuring device, thereby ensuring that the extension direction of the first substrate 10 is the tire to be tested. The radial direction of the mold 1 makes the sum of the detection result of a detection piece 11 and the center distance from the detection piece 11 to the first substrate 10 equal to the radius of the tire mold 1 to be tested; the first substrate 10 moves along the height direction of the tire mold 1 to be tested, so that each detection piece 11 detects the distance between the inner wall of the tire mold 1 to be tested at different heights and the detection piece 11, thereby obtaining the radius of the tire mold 1 to be tested at different heights. Since the upper lobe and the lower lobe of the tire mold 1 to be tested are stacked together along the axial direction of the tire mold 1 to be tested, the measurement of the upper lobe and the lower lobe of the tire mold 1 to be tested can be completed simultaneously only by moving the first substrate 10, without reinstalling and calibrating the tire mold inner diameter measuring device, thereby solving the problem of low measurement efficiency of the tire mold inner diameter measuring device in the prior art.

[0031] Specifically, the two detection members 11 are a left detection member 111 and a right detection member 112 .

[0032] In this embodiment, the tire mold inner diameter measuring device also includes: a reference disk 20, the center of the reference disk 20 coincides with the center of the first substrate 10, and the first substrate 10 is rotatably arranged on the reference disk 20 around the axis of the reference disk 20; the first substrate 10 has a first detection position and a second detection position, when the first substrate 10 is in the first detection position, the extension direction of the first substrate 10 is perpendicular to the extension direction of the first substrate 10 in the second detection position; the reference disk 20 is movably arranged along the first preset direction and the second preset direction, so that when the first substrate 10 is in the second detection position and the first detection position, the detection results of the two detection members 11 are the same by adjusting the position of the reference disk 20 in the first preset direction and the second preset direction.

[0033] Specifically, the first substrate 10 is rotatably arranged on the reference disk 20 around the axis of the reference disk 20, so that each detection member 11 can detect the distance between the inner wall of the tire mold 1 to be tested and the detection member 11 at different angles, and then along the circumferential direction of the tire mold 1 to be tested, the radii of multiple tire molds 1 to be tested at the same height are obtained, so as to facilitate the subsequent out-of-roundness and eccentricity detection of the tire mold 1 to be tested.

[0034] Specifically, when the first substrate 10 is in the first detection position, the first substrate 10 extends along the first preset direction, and when the first substrate 10 is in the second detection position, the first substrate 10 extends along the second preset direction. As long as the detection results of the two detection components 11 are the same when the first substrate 10 is in the second detection position and the first detection position, it can be ensured that at this time in the first preset direction and the second preset direction, the two radii of the tire mold 1 to be tested obtained according to the two detection components 11 are the same, and it can be ensured that the center of the first substrate 10 coincides with the projection point of the axis of the tire mold 1 to be tested on the plane where the first substrate 10 is located.

[0035] Specifically, the reference disk 20 is a circular thin plate, and circular scales of 0 to 360 degrees are marked along the circumferential direction on the upper edge of the reference disk 20. The first substrate 10 is a rectangular thin plate, and the center positions of the two side edges of the first substrate 10 are provided with protruding triangular tips, which point to the circular scales on the reference disk 20.

[0036] In this embodiment, the tire mold inner diameter measuring device also includes a support rod 30, which extends along the height direction of the tire mold 1 to be tested, and a plurality of installation positions are arranged on the support rod 30. The reference plate 20 can be movably passed through the support rod 30 along the extension direction of the support rod 30, so that the reference plate 20 can be installed in any one of the plurality of installation positions; wherein the support rod 30 can be movably arranged along a first preset direction and a second preset direction.

[0037] Specifically, by setting multiple installation positions on the support rod 30 and installing the reference plate 20 at any one of the multiple installation positions, it can be ensured that the reference plate 20 drives the first substrate 10 thereon to move along the height direction of the tire mold 1 to be tested, so that each detection piece 11 detects the distance between the inner wall of the tire mold 1 to be tested at different heights and the detection piece 11, thereby obtaining the radius of the tire mold 1 to be tested at different heights; so that the operator can easily adjust the test height of the tire mold 1 to be tested according to actual needs.

[0038] In this embodiment, a first avoidance hole 12 is provided at the center of the first substrate 10, a second avoidance hole is provided at the center of the reference disk 20, and the support rod 30 passes through the first avoidance hole 12 and the second avoidance hole so that the reference disk 20 can be movably passed through the support rod 30.

[0039] Specifically, the setting of the first avoidance hole 12 can prevent the first substrate 10 from interfering with the support rod 30, and the setting of the second avoidance hole can prevent the setting of the reference plate 20 from interfering with the support rod 30, thereby ensuring that the reference plate 20 can drive the first substrate 10 thereon to move on the support rod 30, and ensuring that the reference plate 20 is installed in any one of a plurality of installation positions.

[0040] In this embodiment, the tire mold inner diameter measuring device also includes a limit rod 40, the extension direction of the limit rod 40 is perpendicular to the extension direction of the support rod 30, the limit rod 40 can be detachably installed at any one of a plurality of installation positions on the support rod 30, and the limit rod 40 abuts against the axial end face of the reference plate 20 to limit the reference plate 20.

[0041] Specifically, by abutting the axial end face of the limit rod 40 against the reference disk 20, the limit rod 40 can limit the reference disk 20 in the current installation position, preventing the reference disk 20 from continuing to move downward on the support rod 30, thereby ensuring that the reference disk 20 is fixed in the current installation position.

[0042] In this embodiment, the support rod 30 has multiple mounting holes, which are arranged at intervals along the extension direction of the support rod 30. The multiple mounting holes are arranged one-to-one corresponding to the multiple mounting positions, and the limiting rod 40 can be detachably inserted into any one of the multiple mounting holes.

[0043] Specifically, the limiting rod 40 is detachably inserted into any one of the plurality of mounting holes, so that the limiting rod 40 can limit the reference plate 20 at different mounting positions.

[0044] In this embodiment, the tire mold inner diameter measuring device also includes a second substrate 50, a third substrate 60 and a fourth substrate 70, the support rod 30 is arranged on the second substrate 50, the second substrate 50 is movably arranged on the third substrate 60 along a first preset direction, and the third substrate 60 is movably arranged on the fourth substrate 70 along a second preset direction.

[0045] Specifically, the second substrate 50 is used to connect the support rod 30 and the third substrate 60, and the third substrate 60 is used to connect the second substrate 50 and the fourth substrate 70 to ensure that the support rod 30 can move along the first preset direction and the second preset direction. The fourth substrate 70 is used to be placed on the mounting base to support the entire tire mold inner diameter measuring device.

[0046] Specifically, four fixing holes are provided on the fourth substrate 70 , and bolts are inserted through the fixing holes and then driven into the mounting base surface to fix the fourth substrate 70 on the mounting base surface.

[0047] In this embodiment, a first guide rail 71 extending along the second preset direction is provided on the fourth substrate 70, and a first slide groove is provided at the bottom of the third substrate 60, and the first slide groove can be movably mounted on the first guide rail 71; a second guide rail 62 extending along the first preset direction is provided on the third substrate 60, and a second slide groove 51 is provided at the bottom of the second substrate 50, and the second slide groove 51 can be movably mounted on the second guide rail 62.

[0048] Specifically, the first slide groove is movably mounted on the first guide rail 71, so that the first guide rail 71 can guide the third substrate 60 to prevent the moving direction of the third substrate 60 from deviating from the second preset direction; the second slide groove 51 is movably mounted on the second guide rail 62, so that the second guide rail 62 can guide the second substrate 50 to prevent the moving direction of the second substrate 50 from deviating from the first preset direction.

[0049] In this embodiment, a first mounting hole 72 is provided on the fourth substrate 70, a second mounting hole is provided on the third substrate 60, and a fastener is passed through the first mounting hole 72 and the second mounting hole so that the fourth substrate 70 and the third substrate 60 can be detachably connected; a third mounting hole 64 is provided on the third substrate 60, a fourth mounting hole is provided on the second substrate 50, and a fastener is passed through the third mounting hole 64 and the fourth mounting hole so that the third substrate 60 and the second substrate 50 can be detachably connected.

[0050] Specifically, by passing the fastener through the first mounting hole 72 and the second mounting hole, the fourth substrate 70 and the third substrate 60 are fastened together to prevent the third substrate 60 from moving further; by passing the fastener through the third mounting hole 64 and the fourth mounting hole, the third substrate 60 and the second substrate 50 are fastened together to prevent the second substrate 50 from moving further.

[0051] In this embodiment, the tire mold inner diameter measuring device further includes a display 90 , and each detection component 11 is communicatively connected to the display 90 , so that the display 90 displays the detection result of the detection component 11 .

[0052] Specifically, by displaying the detection result of the detection member 11 on the display device 90 , the user can view the detection result of the detection member 11 conveniently; wherein the display device 90 is connected to the detection member 11 via a connecting line.

[0053] In specific implementation, the method of using the tire mold inner diameter measuring device of the present invention is as follows:

[0054] 1. Install the fourth substrate 70, the third substrate 60 and the second substrate 50 in order, and then install the support rod 30;

[0055] 2. Install the reference plate 20 and the first substrate 10 onto the support rod 30 in order;

[0056] 3. Install the two detection members 11 on the first substrate 10, and connect the two detection members 11 together through a connecting line and a display device 90, thereby completing the assembly of the tire mold inner diameter measuring device of the present application;

[0057] 4. Place the tire mold inner diameter measuring device of the present application at the bottom center of the tire mold 1 to be tested, with the two detection components 11 located at the highest point of the tire mold 1 to be tested;

[0058] 5. Because the horizontality of the surface can be decomposed into two horizontal angles in vertical directions, place an inclinometer on two mutually perpendicular edges of the third substrate 60, and then place another inclinometer on the two leveling edges on the mounting base surface. The two leveling edges are perpendicular to each other, and the two leveling edges correspond to the two edges of the third substrate 60. By adjusting the bolts on the fourth substrate 70, the position of the fourth substrate 70 is replaced to ensure that each edge of the third substrate 60 is parallel to the corresponding leveling edge. This ensures that the mounting base surface where the tire mold 1 to be tested is located is completely parallel to the plane of the third substrate 60;

[0059] 6. Rotate the reference disk 20 until the distribution directions of 0° and 180° on the reference disk 20 are parallel to the second preset direction, and then rotate the first substrate 10 so that the triangular tips on the two side edges of the first substrate 10 point to 0° and 180° respectively. At this time, the first substrate 10 extends along the second preset direction and is in the second detection position. Record the detection result L of the left detection member 111 at this time. 左0 and the detection result L of the right detection member 112 右180 , if L 左0 ≠L 右180 , then move the third substrate 60 until L 左0 =L 右180 Then rotate the first substrate 10 so that the triangular tips on the two side edges of the first substrate 10 point to 90° and 270° respectively. At this time, the first substrate 10 extends along the first preset direction, and the first substrate 10 is in the first detection position. Record the detection result L of the left detection member 111 at this time 左90 and the detection result L of the right detection member 112 右270 , if L 左90 ≠L 右270 , then move the third substrate 60 until L 左90 =L 右270 , taking the center of the first avoidance hole 12 as the initial point;

[0060] 7. Sequentially adjust the limiting rod 40 to be detachably mounted on the supporting rod 30 in a plurality of mounting positions, so that the reference plate 20 is fixed at different mounting positions, so that each detection member 11 detects the distance between the inner wall of the tire mold 1 to be tested at different heights and the detection member 11, thereby obtaining the radius of the tire mold 1 to be tested at different heights;

[0061] 8. Record the radius of the tire mold 1 to be tested at different heights to obtain a three-dimensional data point set A[R(α), Zi] of the inner diameter of the tire mold 1 to be tested, wherein R(α)=Lleft and right(α)+Llaser, Lleft and right(α) is the measurement result of the left detection member 111 and the right detection member 112 under the scale α on the reference disk 20 pointed to by the triangular tips on the two side edges of the first substrate 10, Lleft and right(α) is a set of test results including the left detection member 111 and the right detection member 112 at the corresponding angle α, L The laser is the distance from the emission port of the detection element 11 to the center of the first substrate 10, Zi is the test height of the tire mold 1 to be tested, i=1,2…n represents the test height adjustment test, when Zi=0 represents the height of the upper and lower flaps of the tire mold 1 to be tested, that is, the center area of ​​the tread, when Zi>0 represents the test height located at the upper flap of the tire mold 1 to be tested, when Zi<0 represents the test height located at the lower flap of the tire mold 1 to be tested, the absolute value of Zi represents the distance of the test height from the center plane of the tire tread;

[0062] 9. In the point set A[R(α), Zi], it is a set of numerical values ​​of R(α) at ​​each test height Zi. The point set A[R(α), Zi] is divided into the point set P[Rp(α), Zpi] and the point set G[Rg(α), Zgi] according to the size of R(α), which respectively represent the tire tread area point set (R(α) larger data point set) and the tire groove point area point set (R(α) smaller data point set); each subset in the point set P[Rp(α), Zpi] and the point set G[Rg(α), Zgi] is a data set Rj[αj, Rj(α)] composed of different angles αj and radii Rj(α), where j represents the different number of measurements at the current test height. For the above data set Rj[αj, Rj(α)], establish the fitting standard deviation function of the center position of the point set:

[0063]

[0064] Among them, R0, α0 are the distance and phase angle between the center of the circle and the initial point calculated by fitting at the current test height, m ​​is the number of laser measurements at the current height point, and the values ​​of R0 and α0 can be obtained by using the least squares method; the out-of-roundness data at the current test height is:

[0065]

[0066] Right now Where K is the total number of all tread or groove points at the current height.

[0067] By performing the above calculations on each subset of the point set P[Rp(α), Zpi] and the point set G[Rg(α), Zgi] at the same time, we can obtain the tread area point set PR[RRi, rpi, R0i, α0i, Zpi] and the groove area point set PG PGR[RRgi, rgi, Rg0i, αg0i, Zgi]. Each parameter of these two sets is respectively represented by the out-of-roundness of the tread area or sidewall area, the fitting radius, the distance of the fitting circle center from the test center, the phase angle of the fitting circle center from the test center, and the measuring point height.

[0068] 10. Inner diameter measurement and evaluation of the tire mold 1 to be tested: (1) Out-of-roundness evaluation: the out-of-roundness RRi of the tread area and the out-of-roundness RRgi of the groove area in the point set PR and the point set PGR, the smaller the value, the better; (2) Tread block size accuracy evaluation: the distance detaRi between the fitting centers of the tread area and the groove area at different test heights is used for evaluation. The smaller detaRi is, the smaller the deviation of the tire tread block size accuracy is. The calculation formula for detaRi is:

[0069]

[0070] (3) Eccentricity evaluation: The standard deviations stdR0i and stdRg0i of the distance R0i of the fitting circle center of the tread area from the test center and the distance Rg0i of the fitting circle center of the sidewall area from the test center in the point set PR and the point set PGR are used to represent the eccentricity of the corresponding circles in the tread area and sidewall area of ​​the tire mold. (4) Taper evaluation: The difference in the radius of the fitting circles of the upper and lower flap molds at the same test height is calculated, that is, when the absolute values ​​of Zpi and Zgi are the same, the difference in the radius of the fitting circles of the upper and lower flap molds in the tread area, detarpi, and the difference in the radius of the fitting circles of the upper and lower flap molds in the groove area, detargi, are calculated:

[0071] detarpi=rpi(upper die Zpi)-rpi(lower die Zpi);

[0072] detargi=rgi(upper mold Zgi)-rgi(lower mold Zgi);

[0073] When the detarpi or detargi value is positive and continues to increase with the absolute value of Zpi (or Zgi), the inner diameter of the tire mold tread or groove area is tapered, and the upper lobe mold size is larger; when the detarpi or detargi value is negative and continues to decrease with the absolute value of Zpi (or Zgi), the inner diameter of the tire mold tread or groove area is tapered, and the lower lobe mold size is larger; when the detarpi or detargi value is both positive and negative, the absolute value is small, and it increases irregularly with the absolute value of Zpi (or Zgi), the overall processing accuracy of the inner diameter of the tire mold is high, and no taper is generated. degree phenomenon; when detarpi or detargi values ​​are both positive and negative, the absolute value is too large, and it is irregular with the increase of the absolute value of Zpi (or Zgi), the overall processing accuracy of the inner diameter of the tire mold is poor, and the processing in the inner diameter height direction is uneven; when the inner diameter of the tire mold 1 to be tested shows a taper phenomenon, the fitting circle radius difference detarpi of the upper and lower flap molds in the tread area and the fitting circle radius difference detargi of the upper and lower flap molds in the groove area can be used to perform linear fitting with their corresponding test height Zpi or Zgi absolute values, and the slope represents the degree of taper of the inner diameter of the tire mold. The larger the absolute value of the slope, the greater the taper of the inner diameter of the tire mold.

[0074] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0075] The tire mold inner diameter measuring device of the present invention can simultaneously complete the measurement of the upper and lower lobes of the tire mold 1 to be tested, and can accurately calculate the center axis position and radius value (R0 and α0) of the tire mold 1 to be tested, and the test accuracy can reach 0.1mm; it can calculate the inner diameter size and the tread block size of the tread block area and the groove area of ​​the tire mold 1 to be tested, and can complete the measurement and evaluation of the out-of-roundness, eccentricity and taper of the inner diameter of the tire mold 1 to be tested; the tire mold inner diameter measuring device of the present invention is simple and easy to carry, and can be suitable for the factory accuracy measurement and evaluation of tire molds and regular inspection during the use of tire molds.

[0076] The tire mold inner diameter measuring device of the present invention comprises a first substrate 10 and two detection members 11, each detection member 11 is used to detect the distance between the detection member 11 and the inner wall of the tire mold 1 to be tested along the extension direction of the first substrate 10; by verifying whether the detection results of the two detection members 11 are the same, it can be determined whether the center of the first substrate 10 coincides with the projection point of the axis of the tire mold 1 to be tested on the plane where the first substrate 10 is located; when the detection results of the two detection members 11 are different, the first substrate 10 is moved along the first preset direction and the second preset direction so that the center of the first substrate 10 coincides with the projection point of the axis of the tire mold 1 to be tested on the plane where the first substrate 10 is located, so as to complete the calibration work of the tire mold inner diameter measuring device, thereby ensuring that the extension direction of the first substrate 10 is the tire to be tested. The radial direction of the mold 1 makes the sum of the detection result of a detection piece 11 and the center distance from the detection piece 11 to the first substrate 10 equal to the radius of the tire mold 1 to be tested; the first substrate 10 moves along the height direction of the tire mold 1 to be tested, so that each detection piece 11 detects the distance between the inner wall of the tire mold 1 to be tested at different heights and the detection piece 11, thereby obtaining the radius of the tire mold 1 to be tested at different heights. Since the upper lobe and the lower lobe of the tire mold 1 to be tested are stacked together along the axial direction of the tire mold 1 to be tested, the measurement of the upper lobe and the lower lobe of the tire mold 1 to be tested can be completed simultaneously only by moving the first substrate 10, without reinstalling and calibrating the tire mold inner diameter measuring device, thereby solving the problem of low measurement efficiency of the tire mold inner diameter measuring device in the prior art.

[0077] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0078] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tire mold inner diameter measuring device, characterized in that: include: A first substrate (10) and two detection members (11), wherein the two detection members (11) are respectively arranged on two sides of the first substrate (10), and each detection member (11) is used to detect the distance between the detection member (11) and the inner wall of the tire mold to be tested along the extension direction of the first substrate (10); The first substrate (10) is movably arranged along a first preset direction and a second preset direction so that the center of the first substrate (10) coincides with a projection point of the axis of the tire mold to be tested on the plane where the first substrate (10) is located; The first substrate (10) is movably arranged along the height direction of the tire mold to be tested, so that each of the detection members (11) detects the distance between the inner wall of the tire mold to be tested at different heights and the detection member (11); wherein the first preset direction, the second preset direction and the height direction of the tire mold to be tested are arranged perpendicular to each other.

2. The tire mold inner diameter measuring device according to claim 1, characterized in that: The tire mold inner diameter measuring device further comprises: a reference disk (20), the center of the reference disk (20) coincides with the center of the first substrate (10), and the first substrate (10) is rotatably arranged on the reference disk (20) around the axis of the reference disk (20); the first substrate (10) has a first detection position and a second detection position, and when the first substrate (10) is at the first detection position, the extension direction of the first substrate (10) is perpendicular to the extension direction of the first substrate (10) at the second detection position; the reference disk (20) is movably arranged along the first preset direction and the second preset direction, so that when the first substrate (10) is at the second detection position and the first detection position, the detection results of the two detection members (11) are the same by adjusting the position of the reference disk (20) in the first preset direction and the second preset direction.

3. The tire mold inner diameter measuring device according to claim 2, characterized in that: The tire mold inner diameter measuring device also includes a support rod (30), the support rod (30) extending along the height direction of the tire mold to be tested, a plurality of installation positions are arranged on the support rod (30), and the reference plate (20) is movably arranged on the support rod (30) along the extension direction of the support rod (30), so that the reference plate (20) can be installed at any one of the plurality of installation positions; wherein the support rod (30) is movably arranged along the first preset direction and the second preset direction.

4. The tire mold inner diameter measuring device according to claim 3, characterized in that: A first avoidance hole (12) is provided at the center of the first substrate (10), a second avoidance hole is provided at the center of the reference plate (20), and the support rod (30) passes through the first avoidance hole (12) and the second avoidance hole, so that the reference plate (20) can be movably passed through the support rod (30).

5. The tire mold inner diameter measuring device according to claim 3, characterized in that: The tire mold inner diameter measuring device also includes a limiting rod (40), the extension direction of the limiting rod (40) is perpendicular to the extension direction of the support rod (30), the limiting rod (40) is detachably mounted at any one of the plurality of mounting positions on the support rod (30), and the limiting rod (40) abuts against the axial end face of the reference plate (20) to limit the reference plate (20).

6. The tire mold inner diameter measuring device according to claim 5, characterized in that: The support rod (30) has a plurality of mounting holes, the plurality of mounting holes are arranged at intervals along the extension direction of the support rod (30), the plurality of mounting holes are arranged in one-to-one correspondence with the plurality of mounting positions, and the limit rod (40) is detachably inserted into any one of the plurality of mounting holes.

7. The tire mold inner diameter measuring device according to claim 3, characterized in that: The tire mold inner diameter measuring device also includes a second substrate (50), a third substrate (60) and a fourth substrate (70), the support rod (30) is arranged on the second substrate (50), the second substrate (50) is movably arranged on the third substrate (60) along the first preset direction, and the third substrate (60) is movably arranged on the fourth substrate (70) along the second preset direction.

8. The tire mold inner diameter measuring device according to claim 7, characterized in that: The fourth substrate (70) is provided with a first guide rail (71) extending along the second preset direction, and the bottom of the third substrate (60) is provided with a first slide groove, and the first slide groove can be movably mounted on the first guide rail (71); the third substrate (60) is provided with a second guide rail (62) extending along the first preset direction, and the bottom of the second substrate (50) is provided with a second slide groove (51), and the second slide groove (51) can be movably mounted on the second guide rail (62).

9. The tire mold inner diameter measuring device according to claim 7, characterized in that: The fourth substrate (70) is provided with a first mounting hole (72), the third substrate (60) is provided with a second mounting hole, and a fastener is passed through the first mounting hole (72) and the second mounting hole, so that the fourth substrate (70) and the third substrate (60) are detachably connected; the third substrate (60) is provided with a third mounting hole (64), the second substrate (50) is provided with a fourth mounting hole, and a fastener is passed through the third mounting hole (64) and the fourth mounting hole, so that the third substrate (60) and the second substrate (50) are detachably connected.

10. The tire mold inner diameter measuring device according to claim 1, characterized in that: The tire mold inner diameter measuring device also includes a display (90), and each of the detection components (11) is communicatively connected to the display (90) so that the display (90) displays the detection result of the detection component (11).

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