CN113182213B - Method for confirming validity of identifying bubble defect in giant tire by X-ray - Google Patents

Abstract

The invention discloses a method for confirming the effectiveness of identifying the defect of an internal bubble of a giant tire by using X-rays, belonging to the technical field of tire manufacturing of engineering machinery. The technical scheme is as follows: and attaching plastic cloth liners between each belt ply, the base rubber and the tread rubber to serve as bubble defects, identifying the bubble defects by using X detection equipment and optimizing parameters of the bubble defects, and finally obtaining detection parameters capable of identifying all the plastic cloth liners, namely effective parameters. The invention can improve the effectiveness of the detection parameter setting of the X-ray equipment, and avoid the defect identification and control of the tyre bubbles caused by the defect setting, thereby avoiding the shoulder drop quality fluctuation in the market.

Description

Confirmation method for the effectiveness of X-ray identification of bubble defects in giant tires

technical field

The invention relates to the technical field of construction machinery tire manufacturing, in particular to a method for confirming the validity of identifying bubble defects in giant tires with X-rays.

Background technique

In the production process of giant engineering radial tires, due to the influence of production equipment, technological process and other factors, there are often quality problems such as air bubbles in the tire, thin steel wires, and wire crossings, which directly or indirectly affect the product quality and shorten the service life of the tire. Therefore, X-ray inspection must be carried out on each finished radial tire in order to detect problems in time and take measures to control them.

At present, the same industry has insufficient effectiveness in the identification of air bubbles in the belt layer and the wound tread during the X-ray inspection of giant radial tires, which leads to the early shoulder delamination failure problem of tires in the market.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a method for confirming the validity of using X-rays to identify bubble defects in giant tires, which can improve the effectiveness of X-ray equipment detection parameter settings, and avoid the The resulting tire bubble defect identification and control are not in place, resulting in shoulder quality fluctuations in the market.

The technical scheme of the present invention is:

A method for confirming the effectiveness of X-ray identification of bubble defects in giant tires, including the following steps:

S1: During the trial production of the first tire of a new product, at least one plastic pad is attached on both sides of each belt layer, and the plastic pads on the same side of the different belt layers are staggered up and down; , mark the marking points corresponding to the plastic pads on the laminating drum on one side; after the lamination of the belt layer is completed, the lamination and lamination operation of the film on the belt layer is carried out. Mark both sides of the upper film;

S2: Carry out the shaping operation of the belt layer assembly and the tire tube, and press the belt layer assembly after the shaping is completed, and then mark the tire embryo side one by one according to the mark on the film on the belt layer;

S3: Wrap the base rubber on the tire embryo. After the winding is completed, measure the thickest position of the tire shoulder according to the design drawing, and place two plastic pads on the base rubber corresponding to this position and stagger the above plastic pads up and down. The corresponding position on the embryo side is marked, followed by tread winding, end point film lamination, pressing, tire unloading and embryo vulcanization operations;

S4: Perform X-ray inspection on new product tires. If the above marking points are not clearly identified or the number of identifications is insufficient during the inspection process, optimize the parameters of the X-ray ball head and receiver until all marking points can be effectively identified; this specification The validity of the test parameters is confirmed as qualified, and the test parameters of this specification are saved.

Preferably, in step S1, a plastic pad is placed symmetrically on both sides of each belt layer, and the plastic pad is located at the end of the belt layer; in step S3, the two plastic pads on the base glue are placed symmetrically .

Preferably, the interval between adjacent plastic pads on the same side of the belt layer and the base glue is 100-200mm.

Preferably, the size of the plastic pad is 4mm*2.5mm*1.0mm.

Compared with the prior art, the present invention has the following beneficial effects:

In the invention, the plastic underlay is used as the artificial bubble defect, and the effectiveness of the detection equipment for identifying the bubble defect is confirmed by X-ray detection, so as to ensure that the detection equipment can detect each belt layer and the relationship between the base rubber and the tread rubber in actual production. air bubbles in between. After adopting this method, the effectiveness of the X-ray equipment detection parameter setting can be improved, and the problem of shoulder-off quality fluctuation in the market caused by insufficient identification and control of tire bubble defects can be avoided.

Description of drawings

FIG. 1 is a schematic diagram of the operation of step S1 of the present invention.

FIG. 2 is a schematic diagram of the operation of step S2 of the present invention.

FIG. 3 is one of the operation schematic diagrams of step S3 of the present invention.

FIG. 4 is the second operation schematic diagram of step S3 of the present invention.

FIG. 5 is the third operation schematic diagram of step S3 of the present invention.

FIG. 6 is a schematic structural diagram of a trial-produced tire of the present invention.

In the picture, 1-1# belt layer, 2-2# belt layer, 3-3# belt layer, 4-n# belt layer, 5-plastic cloth, 6- embryo, 7-belt Layer on film, 8-base glue, 9-tread glue.

Detailed ways

The present invention provides a method for confirming the validity of identifying bubble defects in giant tires with X-rays, comprising the following steps:

S1: During the trial production of the first tire of the new product, a 4mm*2.5mm*1.0mm (note: length*width*thickness) plastic pad 5 is symmetrically attached on both sides of each belt layer to act as artificial manufacturing bubbles, and the different layers of belt layers are staggered up and down between the plastic pads 5 on the same side; the specific operations are as follows:

A: As shown in Figure 1, after the first layer of belt layer lamination is completed, symmetrically attach plastic pads a1 and a2 on both sides of the end of 1# belt layer 1, and then place them on the laminating drum on the corresponding side. Mark a; then carry out the 2# belt layer 2 lamination, after the end, the plastic pads b1 and b2 are symmetrically attached to both sides of the 2# belt layer 2 end, and also mark the lamination drum on the corresponding side. b; In the same way, according to this method, the 3# belt layer 3 is attached in sequence, c1, c2 are placed, and c point is marked, until n# belt layer 4 is attached, n1, n2 are placed and n point is marked; mark point a , b, c...n are staggered and do not overlap each other;

B: After the lamination of the belt layer is completed, the lamination and lamination operation of the film 7 on the belt layer is performed, and after completion, the film 7 on the belt layer is two side marked;

S2: Carry out the shaping operation of the belt layer assembly and the tire tube. After the shaping is completed, press the belt layer assembly. Then, as shown in Figure 2, mark the tire embryo 6 one by one according to the mark on the film 7 on the belt layer. On the side, there are points a, b, c...n respectively. This operation facilitates the search and verification of the marked position when the finished product is detected;

S3: Wrap the base rubber 8 on the tire embryo 6. After the winding is completed, measure the thickest position of the tire shoulder according to the design drawing, and place two plastic pads A1 and A2 symmetrically on the base rubber 8 corresponding to this position (as shown in Figure 3- 6), and staggered up and down with the aforementioned plastic cloth 5, and then marked as point A at the corresponding position of the sidewall of the tire embryo 6, followed by tread winding, end point film bonding, pressing, tire unloading and tire embryo vulcanization operation;

S4: Before performing X-ray inspection on new product tires, parameter settings must be performed. Generally, the same inch and similar specifications are used, and the positions of the X-ray ball head and receiver are properly optimized, and then X-ray inspection is performed on the tire; X-ray inspection of new product tires. If the above marking points are not clearly recognized or the number of recognition points is insufficient (that is, when the number of image recognition points is less than the number of marked points), optimize the parameters of the X-ray ball head and receiver until they can be All marked points are effectively identified; the validity of the specification testing parameters is confirmed as qualified, and the specification testing parameters are saved as the standard testing parameters for subsequent production of tires of this specification.

In addition, the trial-produced first tire of the new product can also be confirmed by other laboratory projects and cross-section cutting confirmation.

In the present invention, the plastic underlay 5 is used as the artificial bubble defect, and the effectiveness of the detection equipment for identifying the bubble defect is confirmed by X-ray detection, so as to ensure that the detection equipment can detect each belt layer, the base rubber 8 and the tread in actual production. Bubble defect between glue 9. After adopting this method, the effectiveness of the X-ray equipment detection parameter setting can be improved, and the tire bubble defect identification and control caused by it can be avoided, which leads to the problem of shoulder quality fluctuation in the market.

Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all fall within the scope of the present invention/any Those skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should all be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (4)

1. The method for confirming the effectiveness of identifying the bubble defects in the giant tire by using the X-ray is characterized by comprising the following steps of:

s1: when a new product first tire is trial-manufactured, at least one plastic laying cloth (5) is respectively attached to two sides of each belt layer, and the plastic laying cloths (5) of different belt layers positioned on the same side are staggered up and down; after the laminating, marking a marking point corresponding to the plastic laying cloth (5) on the laminating drum on one side; after the belt ply is attached, attaching and pressing the rubber sheet (7) on the belt ply, and marking the two sides of the rubber sheet (7) on the belt ply according to the marking points after the attaching is finished;

s2: shaping the belt ply component and the tire tube, pressing the belt ply component after shaping is finished, and marking the belt ply component on the tire side of the tire blank (6) in a one-to-one correspondence mode according to marks on a rubber sheet (7) on the belt ply;

s3: winding a base rubber (8) on a tire blank (6), measuring the thickest position of a tire shoulder according to a design drawing after winding is finished, placing two plastic laying cloths (5) on the base rubber (8) corresponding to the position and vertically staggering the plastic laying cloths (5), then marking the corresponding positions of the tire side of the tire blank (6), and then sequentially performing tire tread winding, end point rubber sheet attaching, pressing, tire unloading and tire blank vulcanization;

S4: carrying out X-ray detection on the new product tire, and optimizing parameters of an X-ray bulb and a receiver if the identification of the mark points is not clear or the identification number is insufficient in the detection process until all the mark points can be effectively identified; the validity of the specification test parameter is confirmed to be qualified, and the specification test parameter is stored.

2. The method according to claim 1, wherein in step S1, a plastic cloth liner (5) is symmetrically placed on each side of each belt layer, and the plastic cloth liner (5) is located at the end of the belt layer; in step S3, two plastic floorings (5) on the base glue (8) are placed symmetrically.

3. Method according to claim 2, characterized in that the adjacent plastic mats (5) on the same side of the belt layer and the base glue (8) are spaced apart by 100 and 200 mm.

4. A method according to any of claims 1-3, characterized in that the size of the plastic floorcloth (5) is 4mm by 2.5mm by 1.0 mm.

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