Device for detecting bending cracking of chilled plate

Abstract

The utility model discloses a device for detecting bending cracking of a chilled plate, and belongs to the technical field of detection equipment. The device is composed of an oil cylinder, a bent core and a supporting pad, the oil cylinder is connected with the bent core, the whole bent core is of an approximate triangular prism structure, and the bottom end of the bent core is of an arc-shaped structure; the outer side of the supporting pad is of a cuboid structure, a V-shaped groove is formed in the center of the top, and the bottom of the V-shaped groove is in arc smooth transition. And the V-shaped groove and the bottom structure of the bent core are matched into a whole. When the device is used for detecting the bending of the chilled plate, the bending performance of the chilled plate can be effectively controlled, and meanwhile, misjudgment caused by a traditional bending mode can be avoided; and the bending cracking quality objection of the chilled plate is effectively controlled.

Description

Technical Field

[0001] This utility model relates to a device for detecting bending cracks in cold-rolled rigid sheets, belonging to the technical field of testing equipment. Background Technology

[0002] There are currently no corresponding testing standards for bending cold-rolled products (cold-rolled steel sheets). Downstream customers generally use cold-rolled steel sheets to make round tubes. During the production of round tubes, there are no requirements for bending performance, and cracking will not occur. Some customers use cold-rolled steel sheets to make square tubes. During the production of square tubes, they are bent at 90°, which makes them prone to cracking.

[0003] Because cold-rolled steel sheets have high strength but also high brittleness, they will crack 100% of the time when tested using a conventional bending tester. Furthermore, most laboratories do not perform such tests on cold-rolled steel sheets. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a device for detecting bending cracks in cold-rolled steel sheets, which can effectively detect the bending performance of cold-rolled products (cold-rolled steel sheets).

[0005] The technical solution adopted in this utility model is:

[0006] A device for detecting bending cracks in cold-rolled rigid sheet metal comprises a hydraulic cylinder, a bending core, and a support pad. The hydraulic cylinder is connected to the bending core, which has a triangular prism structure with an arc-shaped bottom. The support pad has a cuboid structure on the outside and a V-shaped groove at the center of the top, with a smooth arc transition at the bottom. The V-shaped groove and the bottom structure of the bending core are integrated into a whole.

[0007] Specifically, the cross-section of the bent core is similar to that of an equilateral triangle, in which the angle between the extended lines of the two sides of the arc structure is 60°, and the radius of the circle corresponding to the arc structure is 10mm.

[0008] Furthermore, the connection between the hydraulic cylinder and the bending mandrel is as follows: a mold with a square groove is fixed below the hydraulic cylinder, the upper part of the bending mandrel is made into an inverted triangular shape on both sides and inserted into the groove, two wedge-shaped irons are tightly connected inside the groove of the mold and fastened to the mold with screws to prevent the bending mandrel from moving.

[0009] In use, the cold-rolled sheet to be tested is placed between the bending mandrel and the support pad. The bending mandrel is moved up and down by a hydraulic cylinder to slowly bend the sample until it is in close contact with the bending mandrel. This method effectively tests the bending performance of cold-rolled products (cold-rolled sheets): if there are no cracks on the inner and outer surfaces of the bent sample, it is considered qualified; if cracks appear on the inner and outer surfaces, it is considered unqualified.

[0010] The device for detecting bending cracks in cold-rolled steel sheets provided by this utility model has the following beneficial effects:

[0011] Using this device for bending testing of cold-rolled steel sheets can effectively control their bending performance and avoid misjudgments caused by traditional bending methods. Quality issues related to bending cracking in cold-rolled steel sheets are effectively controlled.

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 The left view.

[0015] In the diagram: 1 is the hydraulic cylinder, 2 is the bent core, 3 is the support pad, 4 is the arc-shaped structure, and 5 is the V-groove. Detailed Implementation

[0016] Example

[0017] like Figures 1-2 As shown, a device for detecting bending cracks in cold-rolled rigid sheet comprises a hydraulic cylinder 1, a bending core 2, and a support pad 3. The hydraulic cylinder 1 is connected to the bending core 2, which has an approximate triangular prism structure with an arc-shaped structure 4 at the bottom. The support pad has a cuboid structure on the outside and a V-groove 5 at the center of the top. The bottom of the V-groove 5 has a smooth arc transition. The V-groove 5 and the bottom structure of the bending core 2 are integrated into a whole.

[0018] Specifically, the cross-section of the bent core 2 is similar to an equilateral triangle structure, wherein the angle between the extended lines of the two sides of the arc structure 4 is 60°, and the radius of the circle corresponding to the arc structure 4 is 10mm.

[0019] The specific connection method between the hydraulic cylinder 1 and the bending core 2 is as follows: a mold with a square groove is fixed below the hydraulic cylinder, the upper part of the bending core is made into an inverted triangle shape on both sides and inserted into the groove, two wedge-shaped irons are tightly connected inside the groove of the mold and fastened to the mold with screws to prevent the bending core from moving.

[0020] In use, the cold-rolled sheet to be tested is placed between the bending core 2 and the support pad 3. The bending core 2 is moved up and down by the hydraulic cylinder 1 to slowly bend the sample until it is in close contact with the bending core 2. This method can effectively test the bending performance of cold-rolled products (cold-rolled sheets): if there are no cracks on the inner and outer surfaces of the bent sample, it can be judged as qualified; if cracks appear on the inner and outer surfaces, it is judged as unqualified.

Claims

1. A device for detecting bending cracks in cold-rolled rigid sheet metal, characterized in that: It consists of a hydraulic cylinder, a bending core, and a support pad. The hydraulic cylinder is connected to the bending core, which is a triangular prism structure with an arc-shaped bottom. The support pad has a cuboid structure on the outside and a V-shaped groove at the top center. The bottom of the V-shaped groove is a smooth arc transition. The V-shaped groove and the bottom structure of the bending core are integrated into a whole.

2. The device for detecting bending cracks in cold-rolled steel sheets according to claim 1, characterized in that: The cross-section of the bent core resembles an equilateral triangle, with the angle between the extended sides of the arc structure being 60°, and the radius of the circle corresponding to the arc structure being 10mm.

3. The device for detecting bending cracks in cold-rolled steel sheets according to claim 1, characterized in that: The hydraulic cylinder is connected to the upper part of the bending mandrel. A mold with a square groove is fixed below the hydraulic cylinder. The upper part of the bending mandrel is made into an inverted triangular shape on both sides and inserted into the groove. Two wedge-shaped irons are tightly connected inside the groove of the mold and fastened to the mold with screws to prevent the bending mandrel from moving.

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