CN108801789A - Tire sidewall intensity detecting device - Google Patents

Abstract

The invention relates to a tire sidewall strength detection device, which belongs to the technical field of tire strength detection, and comprises a crown penetration strength testing machine, a pressure sensor, an indenter, and a fixing frame. The crown penetration strength testing machine consists of a base and a moving sliding table It consists of a loading shaft, a pressure sensor is installed under the loading shaft, a cylindrical indenter is fixed under the pressure sensor, the end of the indenter is hemispherical, the fixed frame is fixed on the mobile slide, and a scale is fixed on the horizontal surface of the base , a positioning pointer is installed at the bottom of the mobile slide table, the invention can meet the requirements of the tire sidewall strength test, the measured data is accurate, and avoid the shortcomings of long outdoor test period, poor reproducibility and high risk. At the same time, it improves the equipment Improve production efficiency, protect personnel safety, improve reproducibility, reduce test cycle, and save tire testing costs.

Description

Tire sidewall strength testing device

technical field

The invention belongs to the technical field of tire strength detection, in particular to a tire sidewall strength detection device.

Background technique

With the use of tires with larger rim diameters and smaller aspect ratios by automobile manufacturers, when the car passes through potholes, obstacles and curbs at high speed, the sidewall of the tire may be partially damaged due to the lack of protection of the belt layer. The sudden impact of a sharp hard object exceeds the bearing capacity of the sidewall, causing the sidewall cord to loosen or break. A tire blowout at the cord breaking point will bring safety hazards to driving. The bulge caused by the impact damage on the tire sidewall cannot be repaired, and the replacement of the tire will incur a considerable cost. Therefore, the detection and evaluation of the sidewall strength of the factory tire put forward higher requirements. At present, the real vehicle test method is adopted in the market. The driver unilaterally hits the roadside test device at different speeds. After each collision with the roadside test device, immediately mark the impact position with a marker pen at the end of the test track. Check the damage and bulge of the tire. For the tire sidewall detection experiment like this, the tire manufacturer can only come up with a test plan for one tire and one tire, and cooperate with the automobile manufacturer to conduct subjective evaluation in the outdoor test field. Such a relatively primitive detection experiment , the test data obtained vary greatly from person to person, and the test data cannot accurately and objectively reflect the impact resistance of each part of the tire sidewall. At the same time, the tire test experiment has the disadvantages of relatively long cycle, poor reproducibility and high risk.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a tire sidewall strength detection device

, it is by adding tire fixing, positioning and testing equipment to the existing tire crown penetration strength testing machine, so that the machine can become a tire sidewall strength testing device under the condition that the original function remains unchanged. It can effectively Test the penetrating force of carcass in different parts of the tire sidewall and tire cords of different structures, and measure the impact resistance by destroying the penetrating force of the cords, which completely solves the inaccurate detection data and reproducibility in outdoor testing experiments. It has the disadvantages of poor performance, long test cycle, and high risk. At the same time, it greatly reduces the cost of tire testing.

The technical solution adopted by the present invention to solve the technical problem is: a tire sidewall strength detection device, including a crown penetration strength testing machine, a pressure sensor, an indenter, and a fixing frame, and is characterized in that the crown penetration strength test The machine is composed of a base, a moving slide and a loading shaft. A pressure sensor is installed under the loading shaft. A cylindrical indenter is fixed under the pressure sensor. The end of the indenter is hemispherical. The fixing frame is fixed on the moving slide. The base A scale is fixed on the horizontal surface of the platform, and a positioning pointer is installed on the bottom of the mobile slide.

The beneficial effect of the present invention is that, on the basis of the tire crown penetration strength testing machine, the device can be converted into a tire tire under the condition that the original function remains unchanged by adding tire fixing, positioning and testing devices. The sidewall strength detection device can meet the requirements of the tire sidewall strength test, and the detection data is accurate, avoiding the shortcomings of long outdoor testing period, poor reproducibility, and high risk. At the same time, it improves the production efficiency of the equipment, The detection cycle is shortened, the reproducibility is improved, potential safety hazards are eliminated, and the cost of tire detection experiments is greatly reduced.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

In the figure 1. Crown crush strength testing machine, 2. Pressure sensor, 3. Indenter, 4. Loading shaft, 5. Fixed frame, 6. Moving slide table, 7. Scale, 8. Positioning pointer, 9. Tire Rim assembly, 10. Base.

Detailed ways

The present invention comprises a crown puncture strength testing machine 1, a pressure sensor 2, an indenter 3, and a fixing frame 5. The crown puncture strength testing machine 1 is composed of a base 10, a moving slide 6 and a loading shaft 4, and the loading shaft 4 is below the A pressure sensor 2 is installed, and a cylindrical indenter 3 is fixed below the pressure sensor 2. The end of the indenter is hemispherical, the fixed frame 5 is fixed on the mobile slide 6, and the horizontal surface of the base 10 is fixed with a scale 7 , a positioning pointer 8 is installed at the bottom of the mobile slide table 6 .

Before the tire sidewall detection test, install the test tire on the test rim specified in GB/T2978 and assemble it into a tire rim assembly 9, then inflate according to the specified air pressure, and determine 5 equally spaced tires on the tire sidewall along the circumferential direction. The test points shall be marked and numbered one by one, and the inflated test tire rim assembly 9 shall be parked for more than 3 hours according to the requirements of GB4502, check and tighten the connecting bolts between the mobile slide table 6 and the fixed frame 5, check the pressure sensor 2 and Check whether the indenter 3 is firmly fixed, readjust the tire rim assembly 9 that has been parked to meet the time requirement to the specified air pressure, install the adapter plate in the center of the tire rim assembly 9, place it on the fixed frame 5 and fix it with a tapered screw, and move it The front and back centerlines of the table 6 and the loading shaft 4 are in the same plane. After starting up, the screw installed in the base 10 rotates under the drive of the motor, driving the mobile sliding table 6 fixed on the guide rail directly below the loading shaft 4 Move back and forth, adjust the positions of the tires of different specifications and the indenter 3 by adjusting the position of the positioning pointer 8 and the scale 7, and adjust the up and down positions of the tires of different specifications and the indenter 3 by moving the loading shaft 4 up and down. Positioning, adjust the indenter 3 to the test point on the tire sidewall surface before the test, when the tire to be tested is adjusted according to the above method, start the test, and give the indenter through the loading shaft 4 of the crown penetration strength testing machine 1 3. Gradually apply force to the outer surface of the sidewall at a certain moving speed. When the carcass cord breaks, stop the test. Measure and record the force exerted by the indenter 3 on the sidewall of the tire at the moment of stopping through the pressure sensor 1, and Measure the size of the bulge, test point by point, measure the impact resistance according to the force of breaking the cord and penetrating, and judge whether the tire carcass structure meets the requirements through the force.

Claims (1)

1. a kind of tire sidewall intensity detecting device, including crown press to wear strength-testing machine, pressure sensor, pressure head, fixed frame, It is made of pedestal, Mobile Slide and loading axis it is characterized in that, crown presses to wear strength-testing machine, pressure is installed below loading axis Sensor is fixed with cylindrical crimp below pressure sensor, and the end of pressure head is hemispherical, and fixed frame is fixed on mobile cunning On platform, scale is fixed on the level table of pedestal, Mobile Slide bottom is equipped with positioning pointer.