Bonding performance testing method and testing device for vulcanized rubber and steel wire cord combination

Abstract

The invention relates to the technical field of detection of binding performance of vulcanized rubber and steel wire cords, and discloses a method and a device for testing the binding performance of a combined body of vulcanized rubber and steel wire cords, and the method comprises the following steps: vertically combining long-strip-shaped vulcanized rubber and long-strip-shaped steel wire cords to obtain a test sample; cutting off protruding steel wire cords on the two sides along the side face of the vulcanized rubber to obtain a combined section; the combined sections on the same side form a sealed environment, and the combined sections on the other side form an open environment; initial pressure is applied to the sealed environment, and the pressure is stopped after the pressure is applied for a fixed time. The vulcanized rubber and the steel wire cord which are vertically combined are arranged to form a test sample, the protruding steel wire cord is cut off along the two side faces of the vulcanized rubber through an angle grinder, a flat rubber and cord steel wire combined section is obtained, and gas permeation testing is conducted on the combined section through an air compressor and a display screen. The real combination tightness evaluation is obtained, and the judgment accuracy of the tire quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detecting the bonding performance of vulcanized rubber, and particularly relates to a method and device for testing the bonding performance of a combination of vulcanized rubber and steel cord. Background Art

[0002] As a key skeleton material of tires, the tightness of the bond between steel cord and the vulcanized rubber matrix (the airtightness at the bonding position of the two) is one of the core factors determining the durability and service life of tires. In current laboratory tests, the commonly used sample preparation method is: combining a long strip of vulcanized rubber and a long strip of steel cord in parallel to form an embedded bonding structure. Before testing, the sample needs to be cut to expose the steel-rubber bonding cross-section available for airtightness testing. Currently, this cutting process relies on operators to manually cut or grind the sample using a grinding wheel.

[0003] However, the above existing methods and equipment have significant deficiencies, seriously affecting the accuracy and reliability of test results: one is the inherent defect of the sample structure: the parallel bonding structure makes the grinding wheel need to cut both the vulcanized rubber and the steel cord simultaneously, resulting in deformation, distortion or internal tearing of the soft vulcanized rubber, changing the original morphology and stress state of the bonding surface; the other is that the manual grinding wheel is a rough machining tool, and it is difficult to guarantee the cutting accuracy, easily leading to non-continuous changes in the bonding cross-section. When testing the tightness of the bond between the two (i.e., airtightness testing) on the bonding cross-section, air leakage occurs at the bonding cross-section. Therefore, the "bonding state" or "airtight state" data obtained based on this bonding cross-section cannot truly and accurately reflect the actual bonding performance between materials, resulting in deviations in test results, distorting the evaluation of the tightness of the bond between steel cord and vulcanized rubber, and further affecting the objective judgment and technical improvement of the quality of tire steel cord products. Summary of the Invention

[0004] In order to solve the problems that occur during the airtightness testing of existing vulcanized rubber and steel cord, the present invention provides a method and device for testing the bonding performance of a combination of vulcanized rubber and steel cord. The specific technical solutions are as follows: A method for testing the bonding performance of a combination of vulcanized rubber and steel cord, which includes: Step 1: Vertically bonding a long strip of vulcanized rubber and several long strips of steel cord to obtain a cross-shaped test sample; Step 2: Cutting off the protruding steel cord on both sides along the side surface of the vulcanized rubber to obtain a bonding cross-section for airtightness testing; Step 3: Forming a sealed environment on the bonding cross-section on one side and an open environment on the bonding cross-section on the other side; Step 4: Applying a preset initial pressure to the sealed environment for a preset time, and recording the final pressure of the sealed environment after the pressure application is completed.

[0005] A testing apparatus includes: a cutting assembly forming a fixture for fixing a test sample and a cutting element forming a cutting structure, the cutting element being capable of cutting a plurality of steel wire cords along the length of vulcanized rubber; and a pressure assembly including an air compressor for sealing and pressurizing and a display screen for displaying the pressure within the sealed environment.

[0006] Furthermore, the fixture includes a fixed base, the top of which is provided with a stop bar and a rotatable tightening screw. The top of the tightening screw is connected to a clamping plate, and the clamping plate and the stop bar form a gap for placing the test sample. When the tightening screw rotates, it causes the clamping plate to move relative to the stop bar, thereby changing the width of the gap.

[0007] Preferably, the top of the tightening screw near the stop bar forms a rotatable connection with the clamping plate to adjust the parallelism of the two sides of the gap.

[0008] Preferably, the cutting component includes: A sliding base connected to a fixed fixture forms several slides, the length direction of which is consistent with the length direction of the vulcanized rubber. A sliding rod is installed inside the slide rail, and the moving end of the sliding rod moves along the slide rail; An angle grinder is located at the moving end of the slide bar, and moves relative to the joint area of ​​the vulcanized rubber and the steel wire cord.

[0009] Preferably, the cutting component further includes: A movable block is disposed at the moving end of the slide bar, the movable block forming a fixing hole, the axis of the fixing hole being perpendicular to the length direction of the vulcanized rubber; and A swing bracket is rotatably connected to the fixed hole. The swing bracket is fixed relative to the angle grinder so as to drive the angle grinder to rotate relative to the vulcanized rubber.

[0010] Preferably, the movable block includes an upper movable block forming a fixing hole and a lower movable block connecting the upper movable block and the moving end of the slide rod; The lower moving block protrudes axially from the upper moving block to form a support platform for limiting the downward swing of the swing bracket to its extreme position.

[0011] Preferably, the cutting surface of the angle grinder coincides with one side of the vulcanized rubber.

[0012] As can be seen from the above technical solution, the present invention has the following beneficial effects: This invention sets up a test sample in the shape of a Chinese character by vertically bonding vulcanized rubber and steel cord. The protruding steel cord is cut off along both sides of the vulcanized rubber using an angle grinder to obtain a flat joint cross-section. The air tightness of the joint cross-section is tested using an air compressor and a display screen to obtain an evaluation of the true tightness of the bond between the two, thereby improving the accuracy of objective judgment on tire product quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the vulcanized rubber and steel cord combination in this invention; Figure 2 This is a flowchart illustrating Embodiment 1 of the present invention; Figure 3 A schematic diagram of the structure of the test sample after completing step two; Figure 4 This is a layout diagram of the test samples in Embodiment 2 of the present invention; Figure 5 A schematic diagram of the cutting assembly embodiment without the angle grinder and swing bracket; Figure 6 A schematic diagram of the cutting component embodiment without the angle grinder; Figure 7 This is a structural schematic diagram of an embodiment of the cutting component.

[0014] In the diagram: 1. Test sample; 11. Vulcanized rubber; 12. Steel wire cord; 2. Cutting assembly; 21. Fixture; 211. Fixed base; 212. Tightening screw; 213. Clamping plate; 214. Stop bar; 22. Cutting piece; 221. Angle grinder; 222. Swing bracket; 223. Upper moving block; 224. Lower moving block; 225. Slide rod; 226. Sliding base; 3. Pressure assembly; 31. Air compressor; 32. Display screen. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0017] Example 1 As Figure 1 and Figure 2 shown, Example 1 is a method for testing the bonding performance of a combination of vulcanized rubber and steel cord, which includes: Step 1: A strip-shaped vulcanized rubber 11 and several strip-shaped steel cords 12 are vertically bonded to obtain a cross-shaped test sample 1. Specifically, a single strip-shaped vulcanized rubber 11 is respectively vertically cross-fixed with four groups of parallel strip-shaped steel cords 12 to form the test sample 1, where a single group of strip-shaped steel cords 12 is four parallel steel cords 12, and each single steel cord 12 is formed by winding multiple steel wires. Both ends of the steel cord 12 protrude from both side surfaces of the vulcanized rubber 11, and the steel cord 12 is bonded to the vulcanized rubber 11.

[0018] As Figure 3 shown, Step 2: Cut off the steel cords 12 protruding from both sides along the side surface of the vulcanized rubber 11 to obtain a bonding cross-section for airtightness testing. Specifically, the steel cords 12 are perpendicular to and protrude from both side surfaces of the vulcanized rubber 11. Taking the side surface of the vulcanized rubber 11 as the cutting reference surface, the steel cords 12 are cut so that the remaining length of the steel cord 12 is equal to the width of the vulcanized rubber 11 (the width direction refers to the direction perpendicular to the length of the vulcanized rubber 11), so that both end faces of the cut steel cord 12 coincide with the side surface of the vulcanized rubber 11, forming a bonding cross-section, and making the bonding cross-sections on the same side of the vulcanized rubber 11 be in the same plane. When observing the side surface of the test sample 1 (i.e., the side surface of the vulcanized rubber 11) at an angle perpendicular to the bonding cross-section, it can be seen that the steel cord 12 and the vulcanized rubber 11 are bonded and attached to each other. Apply a fixed pressure to one side of the bonding cross-section for air permeability testing, and test the change in the air pressure passing through the combination. After a fixed time of 60 s, judge whether the bonding tightness between the steel cord 12 and the vulcanized rubber 11 meets the production requirements based on the finally read air pressure.

[0019] Further, in step three: the joint surfaces on the same side form a sealed environment, while the joint surfaces on the other side form an open environment. Specifically, the two opposite sides of the vulcanized rubber 11 are side A and side B, respectively. The joint surfaces on side A are located on the same plane, and the joint surfaces are used as the bottom surface. The pressure component 3 is used to form a sealed environment, ensuring that the joints between the steel cord 12 and the vulcanized rubber 11 are both in a sealed environment. Secondly, the joint surfaces on side B and side A may be connected inside the vulcanized rubber 11 due to the structural characteristics of the steel cord 12. The joint surfaces on side B are connected to the outside. The structural characteristics of the steel cord 12, including the number of steel wires, the winding pattern of the steel wires, and the slight bending degree of a single steel wire, result in flow gaps in the vulcanized rubber between the steel cords 12.

[0020] Further, step four: Apply a preset initial pressure to the sealed environment, maintain the pressure for a fixed duration of 60 seconds, and record the final pressure of the sealed environment after the pressure application is completed. Specifically, pressure component 3 pressurizes the sealed environment until the initial pressure is reached. Pressure component 3 maintains the sealed environment and stops pressurizing, continuing for a preset time, recording the final pressure and the decrease in initial pressure. Based on the decrease value, it is determined whether the bonding tightness of the test sample 1 meets the requirements. Next, the decrease values ​​of multiple sealed environments of the same test sample 1 are processed, and their average value is calculated to obtain a more accurate test result. In this embodiment, the preset time is 60 seconds. The correlation between the decrease value and the bonding tightness is related to the number of single steel wire cords 12, the winding method, and the shape of a single steel wire (referring to the degree of slight bending). The number and structure affect the bonding degree between the steel wire cords 12 and the vulcanized rubber 11. Poor bonding will result in a larger decrease value, or even zero, while better bonding will result in a smaller decrease value.

[0021] Example 2 like Figure 4 As shown, this second embodiment is a test device using the bonding performance test method in the first embodiment, which includes: a cutting component 2, which forms a fixture 21 for fixing the test sample 1 and a cutting element 22 for forming a cutting structure, the cutting element 22 being capable of cutting a plurality of steel wire cords 12 along the length direction of the vulcanized rubber 11; and a pressure component 3, which includes an air compressor 31 for sealing and pressurizing and a display screen 32 for displaying the pressure in the sealed environment.

[0022] Specifically, the vulcanized rubber 11 is elongated, and the fixing fixture 21 forms an adjustable-width (width direction refers to the direction perpendicular to the length of the vulcanized rubber 11) fixing structure. This fixing structure can be a bolt or servo screw, etc., to achieve linear motion, allowing it to fix its position along the length of the vulcanized rubber 11, thereby fixing the position of the steel wire cord 12. Secondly, the cutting component 22 forms a cutting structure capable of cutting the steel wire cord 12. It can be a cutting tool such as an angle grinder or abrasive wheel, ensuring a flat cut surface when cutting the steel wire cord 12, thus ensuring a flat joint surface. Simultaneously, the cutting component 22 forms a sliding structure whose length direction is consistent with the length direction of the vulcanized rubber 11. After the vulcanized rubber 11 is fixed by the fixing fixture 21, the cutting structure of the cutting component 22 can move along the sliding structure from one end of the vulcanized rubber 11 to the other end, thereby completely cutting off the steel wire cord 12 on the same side. Secondly, the air compressor 31 is a conventional product that converts mechanical energy into gas pressure energy. It achieves gas compression through intake, compression, and exhaust. The test sample, after the protruding steel wire cord has been removed, is placed between two sliders on the same rodless cylinder. The sliders move towards the center under the cylinder's push to clamp the two sides of the test sample, connecting the joint surface to the two sliders respectively. The arrows in the diagram indicate the direction of relative movement between the two sliders. Furthermore, the sliders form through holes to connect to the air compressor. When the two sliders clamp the test sample, the air compressor creates a sealed environment at the joint surface through the through holes, allowing the air compressor to perform an airtightness test (joint tightness test) on the joint surface through these through holes. Then, the air... Compressor 31 injects compressed air into the sealed environment, maintaining the pressure of the sealed space at a preset pressure. Then, the pressure source is turned off, and the pressure will enter the gap between the steel cord 12 and the vulcanized rubber 11 that may exist due to the steel cord, causing the internal air pressure of the sealed environment to drop. Display screen 32 detects the internal air pressure in the sealed environment in real time through pressure sensors and displays it in real time. The operator assesses the airtightness of the joint section based on the air pressure drop value of the sealed environment after a preset time, and then assesses the tightness of the joint between the steel cord 12 and the vulcanized rubber 11 at the joint section. When the operator judges from experience that the tightness of the joint is insufficient, it will be fed back to the designer for improvement of the structure of the steel cord until the test results meet the requirements.

[0023] like Figures 5 to 7 As shown, the fixed fixture 21 includes a fixed base 211. The top of the fixed base 211 is provided with a stop bar 214 and a rotatable tightening screw 212. The top end of the tightening screw 212 is connected to a clamping plate 213. The clamping plate 213 and the stop bar 214 form a gap for placing the test sample 1. When the tightening screw 212 rotates, it drives the clamping plate 213 to move relative to the stop bar 214 to change the width of the gap. The top end of the tightening screw 212 near the stop bar 214 forms a rotatable connection with the clamping plate 213 to adjust the parallelism of the two sides of the gap.

[0024] Specifically, the fixed base 211 remains stationary, and its top left end is constrained by a nut to the position of the tightening screw 212, allowing it to move axially only by rotation. Its right end is rotatably connected to the left end of the clamping plate 213 via a pin. The clamping plate 213 is a triangular plate, allowing the tightening screw 212 to push the clamping plate 213 to the left or right by rotation. Furthermore, the right end of the clamping plate 213 and the stop strip 214 fixed to the fixed base 211 form an adjustable gap, in which the vulcanized rubber 11 is fixed, allowing it to be fixed or released, thus fixing the position of the vulcanized rubber 11. It also allows the vulcanized rubber 11 to be rotated 180 degrees and reinserted into the gap for the cutting process of the steel wire cord 12. The clamping plate 213 can rotate freely relative to the tightening screw 212. When the tightening screw 212 drives the clamping plate 213 to move towards the stop bar 214 to clamp and fix the vulcanized rubber 11, the clamping plate 213 swings around the pin to adapt to the shape of the vulcanized rubber 11 and change its parallelism with the stop bar, so that both the clamping plate 213 and the stop bar 214 can make full contact with the vulcanized rubber 11, ensuring its fixing effect while improving the uniformity of its clamping force. Secondly, the height of the stop bar 214 and the clamping plate 213 (the height direction refers to the direction that is perpendicular to both the width and length directions) is not higher than the height between the bottom of the steel wire cord 12 and the vulcanized rubber 11, so that when the test sample 1 is placed in the gap, the stop bar 214 and the clamping plate 213 do not interfere with it.

[0025] Furthermore, the cutting component 22 includes: a sliding base 226 connected to the fixed fixture 21, the sliding base 226 forming a plurality of slides, the length direction of the slides being consistent with the length direction of the vulcanized rubber 11; a slide rod 225 disposed in the slides, the moving end of the slide rod 225 moving along the slides; and an angle grinder 221 disposed at the moving end of the slide rod 225, the angle grinder 221 moving relative to the bonding area of ​​the vulcanized rubber 11 and the steel cord 12.

[0026] Specifically, the bottom of the sliding base 226 is welded or bolted to the fixed base 211, and a horizontal thick plate is formed on its top. The length direction of the horizontal thick plate is consistent with the length direction of the vulcanized rubber 11, and two through and parallel slide tracks are formed along the length direction of the horizontal thick plate. The inside of the slide track is slidably connected to the slide rod 225. Linear bearings can be installed inside the slide track or lubricating oil can be applied to reduce the friction between the slide rod 225 and the slide track and improve the movement accuracy of the slide rod 225. Secondly, the moving end (i.e., the left end) of the slide bar 225 is fixedly connected to the angle grinder 221. When the slide bar 225 moves along the slide rail, it drives the angle grinder 221 to move along the length direction of the slide rail, where the length direction of the slide rail is located on the horizontal plane, thereby driving it to move relative to the test sample 1. The angle grinder 221 is preferably a grinding wheel, so that the slide bar 225 drives the grinding wheel to move horizontally along the side of the vulcanized rubber 11. The joint area of ​​the vulcanized rubber 11 and the steel cord 12 refers to the intersection area of ​​the steel cord 12 and the side of the vulcanized rubber 11, thereby forming a neat and flat joint section to cut the protruding steel cord 12, avoiding unevenness caused by manual cutting and avoiding damage to the joint section due to improper operation. The lowest point of the grinding wheel is lower than the steel cord 12, so that when the grinding wheel moves in the horizontal direction, it can cross the steel cord 12 to cut the steel cord 12.

[0027] Furthermore, the cutting component 22 also includes: a movable block disposed at the moving end of the slide bar 225, the movable block forming a fixing hole, the axis of the fixing hole being perpendicular to the length direction of the vulcanized rubber 11; and a swing bracket 222 rotatably connected to the fixing hole, the swing bracket 222 being fixed relative to the angle grinder 221 to drive the angle grinder 221 to rotate relative to the vulcanized rubber 11.

[0028] Specifically, the left end (i.e., the moving end) of the slide bar 225 is fixedly connected to the moving block by bolts to form an integral structure. The moving block has a through-hole in the horizontal direction, which is rotatably connected to the swing bracket 222 via a rotating pin. One side of the swing bracket 222 is fixedly connected to the angle grinder 221 by bolts and a bracket. The axis of the fixing hole is perpendicular to the moving trajectory of the angle grinder 221, so that when the swing bracket 222 swings up and down around the fixing hole, it can drive the angle grinder 221 to swing up and down, thereby driving the grinding wheel of the grinding machine to move up and down relative to the vulcanized rubber 11. Simultaneously, the swing bracket 222 moves along the length of the vulcanized rubber 11 via the moving block and slide bar 225, allowing the grinding wheel of the grinding machine to move up and down relative to the vulcanized rubber 11. The protruding steel wire cord 12 can move up and down, and can also move horizontally along one side of the vulcanized rubber 11. This allows the operator to control the cutting position of the angle grinder 221 by operating the swing bracket 222, so that it can cut all the protruding steel wire cords 12 along the side of the vulcanized rubber 11, or cut a specific protruding steel wire cord 12. This increases the cutting freedom of the angle grinder 221, and allows testing to be performed on all joint sections of the same test sample 1, as well as on joint sections at specific locations of the same test sample 1, thus increasing the freedom of the testing experiment.

[0029] Furthermore, the movable block includes an upper movable block 223 forming a fixing hole and a lower movable block 224 connecting the upper movable block 223 and the moving end of the slide bar 225; the lower movable block 224 protrudes axially from the upper movable block 223 to form a support platform for limiting the downward swing of the swing bracket 222 to the extreme position.

[0030] Specifically, the upper moving block 223 is a semi-cylinder with a fixing hole inside, and the lower moving block 224 is a rectangular block. Secondly, the length of the upper moving block 223 is less than the length of the lower moving block 224, and one end of the upper moving block 223 and the lower moving block 224 are flush, while the other ends are not flush. The other end of the lower moving block 224 can protrude from the upper moving block 223 to form a support platform. When the swing bracket 222 is rotatably connected to the fixed hole, the swing bracket 222 can only swing relative to the lower moving block 224, but cannot translate. At the same time, the vertex of the end of the swing bracket 222 connected to the fixed hole forms an arc surface that is tangent to the support platform, and then swings around the support platform. Secondly, the side of the swing bracket 222 that is tangent to the arc surface is a plane. When the swing bracket 222 swings downward, the arc surface swings relative to the support platform until its side surface coincides with the support platform. The swing bracket 222 cannot continue to swing downward. This is the limit position of the swing bracket 222 swinging downward, so that the angle grinder 221 cannot continue to move downward, thereby avoiding the angle grinder 221 from descending excessively relative to the vulcanized rubber 11 and damaging the fixed fixture 21.

[0031] Furthermore, the cutting surface of the angle grinder 221 coincides with one side of the vulcanized rubber 11. Specifically, the cutting surface of the angle grinder 221 is a vertical surface. After the test sample 1 is fixed by the fixture 21, the side where the vulcanized rubber 11 intersects with the steel wire cord 12 is a vertical surface. The vertical surface of the angle grinder 221 coincides with the vertical surface of the vulcanized rubber 11, so that when the swing bracket 222 drives the angle grinder 221 to move downward and horizontally, it can just cut off the protruding steel wire cord 12, forming a flat joint section. Next, after cutting the steel wire cord 12 on one side of the vulcanized rubber 11, loosen the fixing fixture 21, turn the vulcanized rubber 11 around and fix it again, so that the other side of the vulcanized rubber 11 coincides with the vertical plane of the angle grinder 221 again. Then the angle grinder 221 cuts the protruding steel wire cord 12 again, and then cuts all the protruding steel wire cord 12 on both sides of the vulcanized rubber 11, so as to facilitate the subsequent bonding performance test (i.e., airtightness test).

[0032] Table 1

[0033] Table 1 shows the data from the bonding performance test experiments conducted according to Examples 1 and 2. The first column from the left represents the number of experiments performed on the same test sample, the second column from the left represents the bonding section number at different locations in the same experiment for the same test sample, the third column from the left represents the initial pressure provided by the air compressor to the sealed environment, the fourth column from the left represents the termination pressure displayed on the screen after the sealed environment has been sealed for 60 seconds, the fifth column from the left represents the pressure drop at the corresponding location, and the sixth column from the left represents the average pressure drop in the same test experiment for the same test sample. These values ​​represent the bonding performance of the vulcanized rubber and steel cord in the test sample. The operator considers factors such as the inflation pressure of the corresponding tire, driving speed, and driving environment to determine whether the structure of the steel cord 12 with this bonding performance is qualified.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0035] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A method for testing the bonding performance of a composite of vulcanized rubber and steel cord, characterized in that, Comprising: Step 1: A strip-shaped vulcanized rubber (11) and several strip-shaped steel cord (12) are vertically combined to obtain a cross-shaped test sample (1); Step 2: Cut off the protruding steel cord (12) on both sides along the side of the vulcanized rubber (11) to obtain a bonding cross-section for airtightness testing; Step 3: A sealed environment is formed on the bonding cross-section on one side, and an open environment is formed on the bonding cross-section on the other side; Step 4: Apply a preset initial pressure to the sealed environment for a preset time, and record the final pressure of the sealed environment after the pressure application is completed.

2. A testing apparatus using the bonding performance testing method of claim 1, characterized in that, Comprising: A cutting component (2), the cutting component (2) forms a fixing tooling (21) for fixing the test sample (1) and a cutting member (22) forming a cutting structure, and the cutting member (22) can cut several of the steel cord (12) along the length direction of the vulcanized rubber (11); And A pressure component (3), the pressure component (3) includes an air compressor (31) for sealing and pressurizing and a display screen (32) for displaying the pressure inside the sealed environment.

3. The cutting device according to claim 2, characterized in that: The fixing tooling (21) includes a fixing base (211), a stop bar (214) and a rotatable tightening screw (212) are arranged on the top of the fixing base (211), the top end of the tightening screw (212) is connected to a clamping plate (213), and a gap for placing the test sample (1) is formed between the clamping plate (213) and the stop bar (214); When the tightening screw (212) rotates, it drives the clamping plate (213) to move relative to the stop bar (214) to change the width of the gap.

4. The cutting device according to claim 3, characterized in that: The top end of the tightening screw (212) close to the stop bar (214) forms a rotational connection with the clamping plate (213) to adjust the parallelism of the two side surfaces of the gap.

5. The cutting device according to claim 2, characterized in that: The cutting member (22) includes: A sliding base (226) connected to the fixing tooling (21), the sliding base (226) forms several slideways, and the length direction of the slideways is the same as the length direction of the vulcanized rubber (11); A slide bar (225) arranged in the slideway, and the moving end of the slide bar (225) moves along the slideway; An angle grinder (221) arranged at the moving end of the slide bar (225), and the angle grinder (221) moves relative to the bonding area of the vulcanized rubber (11) and the steel cord (12).

6. The cutting device according to claim 5, characterized in that: The cutting member (22) further includes: A moving block arranged at the moving end of the slide bar (225), the moving block forms a fixing hole, and the axial direction of the fixing hole is perpendicular to the length direction of the vulcanized rubber (11); and A swing bracket (222) rotatably connected to the fixing hole, and the swing bracket (222) is relatively fixed to the angle grinder (221) to drive the angle grinder (221) to rotate relative to the vulcanized rubber (11).

7. The cutting device according to claim 6, characterized in that: The moving block includes an upper moving block (223) forming the fixing hole and a lower moving block (224) connecting the upper moving block (223) and the moving end of the slide bar (225); The lower moving block (224) protrudes axially from the upper moving block (223) to form a support platform for limiting the downward swing of the swing bracket (222) to the extreme position.

8. The cutting device according to claim 5, characterized in that: The cutting surface of the angle grinder (221) coincides with one side of the vulcanized rubber (11).

Images