Device and method for rapidly detecting bending degree of straight steel bar

Abstract

The invention discloses a device and method for rapidly detecting the bending degree of a straight reinforcing steel bar, the device comprises a clamping groove device, the length L1 of the clamping groove device is not less than the length L2 of the detected straight reinforcing steel bar, and the diameter of the detected straight reinforcing steel bar is D; the inner width of the clamping groove of the clamping groove device is iota, and iota is smaller than or equal to D + L2 * 0.4%; the clamping groove device comprises a bottom plate and two side plates, the two side plates are parallel to each other and perpendicularly arranged on the two sides of the bottom plate, the two side plates are oppositely arranged, and the distance between the two side plates is equal to the inner width iota of a clamping groove of the clamping groove device. According to the device and method for rapidly detecting the bending degree of the straight steel bar, the structure is simple, operation is convenient, rapid detection of the straight steel bar is facilitated, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of straight steel bar quality detection, and in particular to a device and method for quickly detecting the curvature of a straight steel bar. Background Art

[0002] Article 6.5 of GB / T1499.2-2018 Steel for Reinforced Concrete Part 2 Hot-rolled Ribbed Steel Bars stipulates that the curvature of straight steel bars should not affect normal use, the curvature per meter should not exceed 4mm, and the total curvature should not exceed 0.4% of the total length of the steel bar. According to the definition of curvature: curvature refers to the degree of curvature of long rolled products (profiles, bars, and pipes) in the length direction. The chord height of the curvature per meter is the curvature per meter; the ratio of the total chord height of the total length to the total length is the total curvature.

[0003] The conventional method of testing the curvature of a straight steel bar is as follows: Place the straight steel bar on a flat ground or platform, then mark the bottom edge of the straight steel bar and the highest point of the curved arc. The distance between the highest point of the curved arc and the vertical line of the bottom edge (chord height) is the curvature. In addition, it is also necessary to pay attention to the relationship between the marking position and the diameter of the steel bar (such as Figure 1 As shown): ①. When the marked bottom edge of the straight steel bar and the highest point of the curved arc are both outside the measuring area, the actual curvature of the steel bar = measured chord height - steel bar diameter; ②. When the marked bottom edge of the straight steel bar and the highest point of the curved arc are one outside the measuring area and the other inside the measuring area, the actual curvature of the steel bar = measured chord height; ③. When the marked bottom edge of the straight steel bar and the highest point of the curved arc are both inside the measuring area, the actual curvature of the steel bar = measured chord height + steel bar diameter.

[0004] In summary, the defects or shortcomings of the existing technology are mainly reflected in: the detection process is relatively cumbersome, and for the production unit, it is only necessary to ensure that the curvature index of the straight steel bars produced is qualified, and there is no need to accurately know the specific value of the curvature. Therefore, according to the specified delivery length of the straight steel bars, a set of straight steel bar curvature rapid detection device and detection method can be invented to ensure that the curvature index of the product is less than or equal to the upper limit value specified in the national standard. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for quickly detecting the curvature of straight steel bars, which has a simple structure and is easy to operate, and is conducive to quickly detecting straight steel bars and improving work efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides a device for quickly detecting the bending degree of straight steel bars, comprising a slot device, wherein the length L1 of the slot device is not less than the length L2 of the straight steel bar to be detected, and the diameter of the straight steel bar to be detected is D; the inner width of the slot of the slot device is ι, ι≤D+L2×0.4%; the slot device comprises a bottom plate and two side plates, the two side plates are parallel to each other and vertically arranged on both sides of the bottom plate, the two side plates are arranged opposite to each other and the distance between the two side plates is the inner width ι of the slot of the slot device.

[0007] As a further improvement of the present invention, the two side panels are fixedly connected to the bottom panel.

[0008] As a further improvement of the present invention, at least one of the two side panels is slidably matched with the bottom panel, and a spacing adjustment structure is provided between the movable side panel and the bottom panel.

[0009] As a further improvement of the present invention, the two side panels are slidably matched with the bottom panel, and a spacing adjustment structure is provided between the side panels and the bottom panel.

[0010] As a further improvement of the present invention, the spacing adjustment structure includes two symmetrically arranged fixed plates, the two fixed plates are respectively connected to the two sides of the base plate, and the two side plates are located between the two fixed plates; the spacing adjustment structure also includes a bolt, one end of the bolt is rotatably connected to the side plate, and the bolt is threadedly connected to the fixed plate.

[0011] As a further improvement of the present invention, a scale is provided on the bottom plate, and the scale is perpendicular to the length direction of the side plate.

[0012] To achieve the above-mentioned purpose, the present invention also provides a method for quickly detecting the curvature of straight steel bars, which attempts to insert the entirety of the straight steel bar to be detected into a slot of a slot device of a device for quickly detecting the curvature of straight steel bars; if the entirety of the straight steel bar to be detected can be inserted into the slot of the slot device, the curvature of the straight steel bar to be detected does not exceed the upper limit value; if the entirety of the straight steel bar to be detected cannot be completely inserted into the slot of the slot device, the curvature of the straight steel bar to be detected exceeds the upper limit value.

[0013] Beneficial Effects

[0014] Compared with the prior art, the device and method for quickly detecting the curvature of a straight steel bar of the present invention have the following advantages:

[0015] 1. The device and method can quickly verify whether the curvature of long rolled products (profiles, bars, and pipes) such as steel bars is qualified, and accurately know the specific value of the curvature of the inspected material. The user can select its function according to its own needs. Under the premise of ensuring product quality, the inspection process is greatly simplified and the inspection efficiency is improved.

[0016] 2. In the slot device, when both side plates are fixedly connected to the bottom plate, the structure is simple and the production cost is low. When at least one of the two side plates is slidably matched with the bottom plate, a spacing adjustment structure is provided between the movable side plate and the bottom plate, and the appropriate slot inner width m can be adjusted according to the diameter of the straight steel bar to be detected, thereby improving the versatility of the slot device, reducing the types of slot devices, and reducing costs.

[0017] 3. A scale is provided on the bottom plate, and personnel can use the scale as a reference when adjusting the inner width of the slot to improve the efficiency of adjustment.

[0018] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the bending degree of straight steel bars;

[0021] Figure 2 It is a front view of the device for quickly detecting the curvature of a straight steel bar of Example 1;

[0022] Figure 3 It is a right view of the device for quickly detecting the bending degree of a straight steel bar of Example 1;

[0023] Figure 4 This is a usage state diagram of the device for quickly detecting the bending degree of a straight steel bar in Example 1;

[0024] Figure 5 It is a front view of a device for quickly detecting the curvature of a straight steel bar according to Example 2;

[0025] Figure 6 This is a right view of the device for quickly detecting the curvature of straight steel bars in Example 2. DETAILED DESCRIPTION

[0026] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] Example 1

[0028] The specific embodiments of the present invention are as follows Figures 1 to 4As shown, a device for quickly detecting the bending degree of a straight steel bar comprises a slot device 1, wherein the length L1 of the slot device 1 is not less than the length L2 of the straight steel bar 3 to be detected, and the diameter of the straight steel bar 3 to be detected is D. The slot inner width of the slot device 1 is ι, ι≤D+L2×0.4%. The slot device 1 comprises a bottom plate 11 and two side plates 12, wherein the two side plates 12 are parallel to each other and vertically arranged on both sides of the bottom plate 11, and the two side plates 12 are arranged opposite to each other and the distance between the two side plates is the slot inner width ι of the slot device 1.

[0029] The side plates 12 and the bottom plate 11 can be made of any steel plate. Both side plates 12 are fixedly connected to the bottom plate 11 by welding. When the fixed connection is made, according to the specifications, length, upper limit of curvature of the straight steel bar 3 to be detected, channel steel, I-beam, etc. with the required model can be found to directly replace the slot device 1.

[0030] In the present application, the width of the bottom plate 11 is B, the thickness is b, B ≥ (required slot inner width ι + side plate thickness a × 2), b ≥ 6 mm. The width of the side plate 12 is C, the thickness is a, C ≥ (diameter of the straight steel bar to be detected + bottom plate thickness b), a ≥ 6 mm. The bottom plate and side plate themselves are flat and have no bends.

[0031] A method for quickly detecting the curvature of a straight steel bar is as follows: try to insert the entirety of the straight steel bar 3 to be detected into the slot of the slot device 1 of the device for quickly detecting the curvature of a straight steel bar. If the entirety of the straight steel bar 3 to be detected can be inserted into the slot of the slot device 1, the curvature of the straight steel bar 3 to be detected does not exceed the upper limit value; if the entirety of the straight steel bar 3 to be detected cannot be completely inserted into the slot of the slot device 1, the curvature of the straight steel bar 3 to be detected exceeds the upper limit value.

[0032] Take the example of "HRB400Eφ12mm hot-rolled ribbed steel bar" with a length of 12m. Figure 4 shown):

[0033] According to Article 6.5 of GB / T1499.2-2018 Steel for Reinforced Concrete Part 2 Hot-rolled Ribbed Steel Bars, the total curvature should be ≤48mm. Therefore, the length L1 of the slot device 1 can be selected as 12m, and the inner width ι of the slot can be selected as 60mm (48mm+12mm). The straight steel bar 3 tested is a 12m HRB400Eφ12mm hot-rolled ribbed steel bar. After the two ends of the 12m HRB400Eφ12mm hot-rolled ribbed steel bar are flush with the slot device 1, the steel bar can be completely flattened in the slot without any hindrance, and the curvature is qualified; otherwise, the curvature is unqualified.

[0034] Example 2

[0035] In addition to the above embodiments, at least one of the two side panels 12 may be slidably matched with the bottom panel 11 , and a spacing adjustment structure is provided between the movable side panel 12 and the bottom panel 11 .

[0036] In this embodiment, Figure 5 and Figure 6 As shown, the difference from the first embodiment is that the two side plates 12 are slidably matched with the bottom plate 11 , and a spacing adjustment structure is provided between the side plates 12 and the bottom plate 11 .

[0037] The spacing adjustment structure includes two symmetrically arranged fixing plates 13, the two fixing plates 13 are respectively connected to the two sides of the bottom plate 11, and the two side plates 12 are located between the two fixing plates 13. The spacing adjustment structure also includes a bolt 14, one end of the bolt 14 is rotatably connected to the side plate 12, and the bolt 14 is threadedly connected to the fixing plate 13.

[0038] A scale 2 is provided on the bottom plate 11 , and the scale 2 is perpendicular to the length direction of the side plate 12 .

[0039] Before detecting the curvature of the steel bar, the appropriate inner width of the slot ι is calculated according to the diameter of the straight steel bar 3 to be detected, and then the distance between the two side plates 12 is adjusted by operating the bolts 14, and then the curvature of the straight steel bar 3 to be detected is detected.

[0040] The present invention is described above in conjunction with the best embodiment, but the present invention is not limited to the above disclosed embodiment, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A device for rapidly detecting the bending degree of straight bar steel bars, characterized in that The invention comprises a slot device (1), wherein the length L1 of the slot device (1) is not less than the length L2 of the straight steel bar (3) to be detected, and the diameter of the straight steel bar (3) to be detected is D; the inner width of the slot of the slot device (1) is ι, ι≤D+L2×0.4%; the slot device (1) comprises a bottom plate (11) and two side plates (12), the two side plates (12) are parallel to each other and are vertically arranged on both sides of the bottom plate (11), the two side plates (12) are arranged opposite to each other, and the distance between the two side plates is the inner width ι of the slot of the slot device (1).

2. A device for rapidly detecting the bending degree of straight bar steel bars according to claim 1, characterized in that, The two side plates (12) are both fixedly connected to the bottom plate (11).

3. A device for rapidly detecting the bending degree of straight bar steel bars according to claim 1, characterized in that At least one of the two side panels (12) is slidably matched with the bottom panel (11), and a spacing adjustment structure is provided between the movable side panel (12) and the bottom panel (11).

4. A device for quickly detecting the curvature of a straight steel bar according to claim 1, characterized in that: The two side plates (12) are both slidably matched with the bottom plate (11), and a spacing adjustment structure is provided between the side plates (12) and the bottom plate (11).

5. A device for quickly detecting the curvature of a straight steel bar according to claim 4, characterized in that: The spacing adjustment structure comprises two symmetrically arranged fixing plates (13), the two fixing plates (13) being respectively connected to two sides of the bottom plate (11), and the two side plates (12) being located between the two fixing plates (13); the spacing adjustment structure also comprises a bolt (14), one end of the bolt (14) being rotatably connected to the side plate (12), and the bolt (14) being threadedly connected to the fixing plate (13).

6. A device for quickly detecting the curvature of a straight steel bar according to claim 3 or 4, characterized in that: The bottom plate (11) is provided with a scale (2), and the scale (2) is perpendicular to the length direction of the side plate (12).

7. A method for quickly detecting the curvature of a straight steel bar, characterized in that: Try to insert the entirety of the straight steel bar (3) to be detected into the slot of the slot device (1) of the device for quickly detecting the curvature of straight steel bars as described in any one of claims 1 to 5; if the entirety of the straight steel bar (3) to be detected can be inserted into the slot of the slot device (1), the curvature of the straight steel bar (3) to be detected does not exceed the upper limit value; if the entirety of the straight steel bar (3) to be detected cannot be completely inserted into the slot of the slot device (1), the curvature of the straight steel bar (3) to be detected exceeds the upper limit value.

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