A pneumatic tire cross-section scanning device and method

Abstract

The present invention relates to an inflatable tire cross-section scanning device and method, comprising: a fixed plate, the fixed plate is provided with a fixed hole matching the cross-section contour of the tire when the tire is inflated with gas at a set pressure, the fixed plate is provided with an inflation component, and the inflation component is connected to an air bag located inside the fixed hole; a fixed platform: the fixed platform has a plurality of support columns, a support plate for supporting the fixed plate is fixed to the top surface of the support column, the support plate is a transparent plate, a lighting element is provided below the support plate, and a scanner is provided above the support plate. The scanning device of the present invention can scan the cross-section of the tire when the tire is inflated.

Description

Technical Field

[0001] The present invention relates to the technical field of tire section detection, and in particular to an inflatable tire section scanning device and method. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] All-steel radial tires are complex composite materials made of rubber and steel wires. They are the only safety parts of a vehicle that touch the ground. During use, tires are subjected to complex forces and deformations. Such complex deformations can easily lead to internal damage to the tires. Therefore, it is very important to reduce the risk of tire damage by studying the deformation of the internal structure of the tire.

[0004] Since pneumatic tires are complex elastic deformable bodies, their dimensions and shapes in the designed state will undergo significant deformation under actual operating conditions such as inflation and load. The design shape of the inner cavity contour determines the internal deformation of the tire before and after inflation, and also affects the tire deformation under different load conditions. Therefore, studying the shape of the tire inner cavity contour and its changes before and after inflation, obtaining the tire's inner cavity contour and internal structure deformation through measurement methods, and thus improving the internal structure stress deformation through optimized design solutions, plays a very important role and value in tire design.

[0005] The currently available method is usually to cut the tire section to measure the relative position of the tire's internal structure. However, the inventors found that since the tire section is soft and easily deformed, there is a large error in the measurement. Although the section is fixed by a fixing device to improve the stability of the measurement, there is a big difference between the internal structure and the inner cavity contour in the design state and the inflated state. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an inflatable tire cross-section scanning device, which is convenient for cross-section scanning of the tire in an inflated state and is helpful for understanding the deformation characteristics of the tire design inner cavity in an inflated state.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] In a first aspect, an embodiment of the present invention provides an inflatable tire section scanning device, comprising:

[0009] A fixing plate, the fixing plate is provided with a fixing hole matching the lower cross-sectional profile of the tire filled with gas at a set pressure, the fixing plate is provided with an inflation component, and the inflation component is connected to the airbag located inside the fixing hole;

[0010] Fixed platform: The fixed platform has multiple support columns, and a support plate for supporting the fixed plate is fixed on the top of the support column. The support plate is a transparent plate with a lighting element below it and a scanner above it.

[0011] Optionally, the fixing plate is made of an acrylic plate or a stainless steel plate.

[0012] Optionally, a pressing plate made of a transparent material is also included, and the pressing plate is used to be placed on the upper surface of the fixing plate.

[0013] Optionally, the pressing plate and the supporting plate are both made of tempered glass.

[0014] Optionally, the inflation component includes an inflation connector, which is connected to one end of an inflation tube, and the other end of the inflation tube passes through the fixing plate, extends into the fixing hole and is connected to the airbag.

[0015] Optionally, the bottom surface of the fixing plate is provided with supporting feet, and the fixing plate can be placed on the supporting columns through the supporting feet.

[0016] In a second aspect, an embodiment of the present invention provides a working method of an inflatable tire section scanning device, comprising the following steps:

[0017] Place the fixing plate on the supporting plate and put the pre-processed tire section sample into the fixing hole;

[0018] The airbag is inflated, and the expansion of the airbag drives the tire section sample to expand until the outer side surface of the tire section sample fits the hole wall of the fixing hole;

[0019] The scanner scans the tire cross-section sample and exports the scanned tire cross-section image.

[0020] Optionally, the tire is scanned under a set air pressure to obtain an outer contour of the tire section, and a fixing hole is reinforced on the fixing plate according to the obtained outer contour.

[0021] Optionally, when the light emitted by the lighting element through the gap between the tire section sample and the wall of the fixing hole cannot be observed, the inflating of the airbag is stopped.

[0022] Optionally, after the tire is cut for the first time in the radial direction of the tire, the tire is cut for the second time in the radial direction of the tire after a set distance in the circumferential direction of the tire, and the portion between the cut surfaces of the two cuts is the tire cross-section sample.

[0023] Beneficial effects of the present invention:

[0024] 1. The scanning device of the present invention has a fixing plate processed with a fixing hole that matches the cross-sectional contour of the tire when it is inflated, and an airbag is arranged in the fixing hole. The airbag can be inflated to simulate the inflated state of the tire, so that the tire cross-sectional sample can be scanned in the inflated state, so that the deformation of the inner contour and internal structure of the tire before and after inflation can be obtained, which has a very important role and value for the design of the tire.

[0025] 2. The method of the present invention, through the inflation of the airbag, utilizes the light leakage of the lighting element to judge whether the outer side surface of the tire cross-section sample is in contact with the hole wall of the fixing hole. The judgment method is simple, convenient and accurate, and can truly simulate the inflation state of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0027] Figure 1 A top view of a fixing plate according to Embodiment 1 of the present invention;

[0028] Figure 2 This is a side view of a fixing plate according to Embodiment 1 of the present invention;

[0029] Figure 3 This is a schematic diagram of the outer contour shape of a tire obtained in Example 1 of the present invention;

[0030] Figure 4 This is a side view of the overall structure of Example 1 of the present invention;

[0031] Figure 5 This is a top view of the overall structure of Example 1 of the present invention;

[0032] Figure 6 This is a front view of the overall result of Example 1 of the present invention;

[0033] Figure 7 This is a schematic diagram of the airbag inflation process in Example 2 of the present invention;

[0034] Figure 8 This is a schematic diagram of the state in which the tire cross-section sample and the wall of the fixing hole are attached to each other in Example 2 of the present invention;

[0035] Fig. 9 This is a schematic diagram of the inner profile of a tire cross section obtained by scanning according to Embodiment 2 of the present invention;

[0036] Among them, 1. fixing plate, 2. fixing hole, 3. long hole, 4. supporting foot, 5. fixing platform, 6. supporting column, 7. supporting plate, 8. spotlight, 9. scanner, 10. scanner bracket, 11. inflation tube, 12. airbag, 13. inflation joint, 14. pressing plate, 15. tire section specimen. DETAILED DESCRIPTION

[0037] Example 1

[0038] This embodiment discloses an inflatable tire section scanning device, including a fixing plate 1, such as Figure 1-Figure 2 As shown, the fixing plate is made of acrylic plate or stainless steel plate, which is convenient for processing. A fixing hole 2 is opened on the fixing plate, and the shape of the fixing hole matches the outer contour shape of the cross section of the tire after it is inflated.

[0039] In this embodiment, Figure 3 As shown, a tire filled with gas at a set pressure can be scanned in advance using a scanner to obtain a cross-sectional profile of the inflated tire, and then the fixing plate can be processed according to the obtained cross-sectional profile of the tire to obtain the fixing hole.

[0040] Furthermore, in order to ensure the accuracy of the fixing holes, in this embodiment, the fixing holes are processed by wire cutting.

[0041] In order to reduce the weight of the fixing plate, the fixing plate is provided with long holes 3 on both sides of the fixing hole.

[0042] The fixing plate is also provided with an inflatable component, which includes an inflatable tube 11, which passes through the fixing plate, one end of which extends into the fixing hole, and the other end extends to the outside of the fixing plate, and the end of the inflatable tube extending to the outside of the fixing plate is connected to an inflatable head 13, and the end located inside the fixing hole is connected to an airbag 12. After the inflatable head is connected to the inflatable device, the airbag can be inflated through the inflatable tube.

[0043] like Figure 4-Figure 6 As shown, the inflatable tire section scanning device also includes a fixed platform 5, on which a plurality of support columns 6 are fixed. In this embodiment, four support columns are arranged on the fixed platform, the bottom ends of the support columns are fixedly connected to the fixed platform, and the top ends of the four support columns are fixed to a support plate 7, which is used to support the fixed plate.

[0044] Supporting feet 4 are also provided at the four corners of the bottom surface of the fixing plate, and the fixing plate is placed on the supporting plate through the supporting feet.

[0045] In this embodiment, the support plate is a transparent plate. In order to ensure the structural strength of the support plate, the support plate is made of tempered glass.

[0046] A lighting element is disposed below the support plate. Since the support plate is a transparent plate, the light emitted by the lighting element can pass through the support plate.

[0047] The lighting element is installed on a fixed platform, and the lighting element can be an existing lighting lamp, such as an LED lamp or a spotlight 8, etc., and those skilled in the art can choose according to actual needs.

[0048] A scanner 9 is arranged directly above the support plate, and the scanner is fixed on the fixed platform through a scanner bracket 10 .

[0049] The scanner can scan the tire section sample placed in the fixing plate of the support plate. The scanner is connected to the host computer through the control system and can transmit the scanned image to the host computer through the control system.

[0050] The scanning device further comprises a pressing plate 14, which is placed on the upper surface of the fixing plate to press the tire cross-section sample. The pressing plate is made of a transparent plate, preferably, made of tempered glass.

[0051] Embodiment 2:

[0052] This embodiment discloses a working method of an inflatable tire section scanning device, comprising the following steps:

[0053] A tire cross-section sample 15 is prepared in advance, and the specific method is as follows:

[0054] A cutting knife is used to perform a first cut along the radial direction of the tire. After the first cut is completed, a second cut is performed along the radial direction of the tire, wherein the cutting surface of the first cut and the cutting surface of the second cut have a set distance along the circumferential direction of the tire, and the tire portion between the cutting surfaces of the first cut and the second cut is the tire cross-section sample.

[0055] Place the pre-prepared fixing plate on the supporting plate, place the pre-prepared tire section sample in the fixing hole, support the tire section sample with the supporting plate, and start the spotlight.

[0056] like Figure 7-Figure 8 As shown, the inflation connector is connected to the inflation device to inflate the airbag. The airbag expands after being inflated, and the expansion of the airbag drives the tire cross-section sample to expand. After the airbag is inflated until the outer side surface of the tire cross-section sample is completely in contact with the hole wall of the fixing hole of the fixing plate, the airbag stops inflating. In this embodiment, by observing the light emitted by the spotlight above the airbag and the tire cross-section sample, when the light emitted by the spotlight cannot be observed, it can be determined that the outer side surface of the tire cross-section sample is completely in contact with the hole wall of the fixing hole.

[0057] In some other embodiments, for the convenience of operation, a camera is provided above the support plate, and the camera is installed on one side of the scanner. The camera is connected to a host computer through a control system, and can transmit collected images to the host computer. During the inflation process, when the image collected by the camera displayed by the host computer does not contain bright spots, it can be considered that the outer side surface of the tire cross-section sample is completely in contact with the hole wall of the fixed hole, and inflation is stopped at this time.

[0058] After stopping inflation, use a scanner to scan the tire section. Fig. 9 As shown, the inner contour of the tire section is obtained, and the scanned image is transmitted to the host computer through the control system.

[0059] The host computer is pre-installed with CAD software, the scanned image is imported into the CAD software, the scanned image is fitted with the CAD design outer contour, and the CAD is used to perform cross-sectional analysis and restore the material distribution map.

[0060] Compared with the existing cross-sectional analysis method and material distribution map restoration method, the method of this embodiment greatly reduces labor intensity, improves work efficiency, and improves measurement accuracy. The ordinary cross-sectional measurement method takes 60 minutes, while the present method only takes 20 minutes, and the measurement accuracy is improved from single digits to two decimal places.

[0061] The time for restoring material distribution maps was reduced from 180 minutes to 60 minutes, and the drawing accuracy was greatly improved, which improved work efficiency and accelerated product development progress.

[0062] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A working method of an inflatable tire section scanning device, characterized in that: include: The pneumatic tire section scanning device comprises: A fixing plate, the fixing plate is provided with a fixing hole matching the cross-sectional profile of the tire filled with set pressure gas, the fixing plate is provided with an inflation component, and the inflation component is connected to the airbag located inside the fixing hole; the fixing plate is made of an acrylic plate or a stainless steel plate; the fixing hole is processed by wire cutting; the inflation component includes an inflation joint, the inflation joint is connected to one end of the inflation tube, the other end of the inflation tube passes through the fixing plate and extends into the fixing hole and is connected to the airbag; the fixing plate is provided with long holes on both sides of the fixing hole; Fixed platform: A plurality of support columns are arranged on the fixed platform, and a support plate for supporting the fixed plate is fixed on the top surface of the support column. The support plate is a transparent plate, and a lighting element is arranged below the support plate, and a scanner is arranged above the support plate; a camera is arranged above the support plate, and the camera is installed on one side of the scanner, and the camera is connected to the upper computer through the control system; The four corners of the bottom surface of the fixing plate are also provided with supporting feet, and the fixing plate is placed on the supporting plate through the supporting feet; Also included is a pressing plate made of a transparent material, the pressing plate being used to be placed on the upper surface of the fixing plate; The pressing plate and the supporting plate are both made of tempered glass; The working method of the pneumatic tire section scanning device comprises the following steps: Place the fixing plate on the supporting plate and put the pre-processed tire section sample into the fixing hole; Start the lighting element to inflate the airbag, the expansion of the airbag drives the tire cross-section sample to expand, and the outer side of the tire cross-section sample fits the hole wall of the fixing hole; specifically, connect the inflation connector to the inflation device, inflate the airbag, the airbag expands after being inflated, the expansion of the airbag drives the tire cross-section sample to expand, and after the airbag is inflated until the outer side of the tire cross-section sample completely fits the hole wall of the fixing hole of the fixing plate, the inflation of the airbag stops; wherein, when the image captured by the camera displayed on the upper computer does not have a bright spot, it is considered that the outer side of the tire cross-section sample completely fits the hole wall of the fixing hole, and inflation is stopped at this time; The scanner scans the tire section sample and exports the scanned tire section diagram; the tire is scanned under a set air pressure to obtain the outer contour of the tire section, and a fixing hole is processed on the fixing plate according to the obtained outer contour.

2. The working method of the pneumatic tire section scanning device according to claim 1, characterized in that: After the tire is cut for the first time along the radial direction of the tire, the tire is cut for the second time along the radial direction of the tire after a set distance along the circumferential direction of the tire. The portion between the cut surfaces of the two cuts is the tire cross-section sample.

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