Tool for improving pre-bending quality of main reinforcement of reinforcement cage

Abstract

The utility model discloses a tool for improving the pre-bending quality of a main reinforcement of a reinforcement cage. The portable hoop bending machine comprises a tool support and a portable hoop bending machine, the tool support comprises a horizontal bottom frame and an upper frame body connected to the upper portion of the bottom frame, idler wheels are arranged at the four corners of the bottom frame, the front portion of the upper frame body is an inclined hoop bending machine supporting frame which is arranged at a certain angle with the bottom frame, and the hoop bending machine supporting frame is of a rectangular frame structure. The portable hoop bending machine is fixed to the front side face of the hoop bending machine supporting frame along the center line of the hoop bending machine supporting frame, the bend of the portable hoop bending machine is arranged downwards, and the inclination angle of the hoop bending machine supporting frame is consistent with the tangent line of a circle where the center of the bending starting point of a main reinforcement of a to-be-bent reinforcement cage is located. And a fixed-length steel pipe which is horizontally arranged and is consistent with the pre-bending length of a reinforcing steel bar is fixed on the side surface of an elbow of the portable hoop bending machine. According to the utility model, the accuracy of the pre-bending direction, angle and length of the main reinforcement of the reinforcement cage can be ensured, and the lap welding quality and efficiency of the reinforcement cage can be improved.

Description

Technical Field

[0001] This utility model relates to a tooling for improving the pre-bending quality of the main reinforcement bars of a steel cage. It is mainly used for pre-bending the main reinforcement bars of a steel cage and belongs to the field of steel cage processing technology. Background Technology

[0002] In bridge construction, bored piles are commonly used as foundations. For long pile foundations, it is necessary to extend the pile reinforcement cage. When extending the reinforcement cage, lap welding is generally used. When lap welding the reinforcement cage, the lap ends of the main reinforcement bars of the two reinforcement cages need to be bent at a certain angle beforehand, and then the bent parts of the main reinforcement bars of the two reinforcement cages are lapped and welded to ensure that the two main reinforcement bars are coaxial after connection.

[0003] Currently, when pre-bending the main reinforcement bars of the rebar cage, manual pre-bending using steel pipes or manual pre-bending using mechanical tools is often used. These methods of pre-bending the reinforcement bars often lead to problems such as inconsistent pre-bending angles, insufficient length, and misalignment of the main reinforcement bars at the joints of the rebar cage, making it impossible to weld the rebar cage. When lap welding the rebar cage on site, tools must be used to process the welds, which affects the construction efficiency of lap welding on site. Utility Model Content

[0004] To address the aforementioned deficiencies in the existing technology, this utility model provides a steel cage main bar pre-bending fixture with a simple structure that can effectively control the pre-bending angle, direction, and pre-bending length of the main bars in the steel cage.

[0005] This utility model is achieved through the following technical solution: a tooling for improving the pre-bending quality of the main reinforcement bars of a steel cage, characterized in that: it includes a tooling support and a portable bending machine. The tooling support includes a horizontal base frame and an upper frame connected to the base frame. Rollers are provided at the four corners of the base frame. The front of the upper frame is an inclined bending machine support frame arranged at a certain angle to the base frame. The bending machine support frame has a rectangular frame structure. The portable bending machine is fixed on the front side of the bending machine support frame along the center line of the bending machine support frame, and the portable bending machine is set with the bent head facing downwards. The inclination angle of the bending machine support frame is consistent with the tangent of the circle where the center of the bending point of the main reinforcement bar of the steel cage to be bent is located. A fixed-length steel pipe with the same length as the pre-bending length of the reinforcement bar is fixed to the side of the bent head of the portable bending machine.

[0006] In this invention, a portable bending machine is fixed at a certain position and angle using a tooling bracket. The portable bending machine bends the main reinforcing bars of the rebar cage to be bent. A fixed-length steel pipe on the side of the bending head of the portable bending machine is used to determine the pre-bending length of the reinforcing bar, ensuring that the pre-bending length is consistent with the design length. When using this invention, the tooling is pushed to the side of the rebar cage set on the roller, and the end of the fixed-length steel pipe is aligned with the end of the main reinforcing bar to be bent to determine the pre-bending length. The corresponding point of the bending head of the portable bending machine is the starting point of the main reinforcing bar to be bent. The portable bending machine bends the main reinforcing bar by clamping it at the starting point. After one main reinforcing bar is bent, the next main reinforcing bar can be bent by rotating the rebar cage. The portable bending machine ensures that the bending angle and direction of each main reinforcing bar are consistent, and the fixed-length steel pipe ensures that the bending length of the reinforcing bars is consistent, thus guaranteeing the pre-bending quality of the main reinforcing bars in the rebar cage.

[0007] Furthermore, to improve the adaptability of the tooling and facilitate the adjustment of the position of the portable bending machine, the upper frame includes two parts that are plugged together. The connection points of the upper and lower parts are provided with multiple pin holes at intervals, and the upper and lower parts are connected as one unit by pins. The portable bending machine is fixed on the upper part of the frame.

[0008] The beneficial effects of this utility model are as follows: This utility model has a simple structure. By fixing the portable bending machine at a certain position and angle using a tooling bracket, the accuracy of the pre-bending direction, pre-bending angle, and pre-bending length of the main reinforcement bars in the rebar cage can be ensured. This reduces problems such as inaccurate pre-bending direction, excessively long or short pre-bending length, and unreasonable pre-bending angle. It improves the quality and efficiency of rebar cage lap welding, makes the pre-bending process standard of the rebar cage joint controllable, reduces manual intervention and straightening during lap welding, saves construction time, reduces costs caused by rebar cage welding quality problems, and lowers construction costs. This utility model is simple to process and manufacture, has low cost, high reliability, and strong practicality, and can be widely promoted and used. Attached Figure Description

[0009] Figure 1 This is a front view schematic diagram of the present invention;

[0010] Figure 2 yes Figure 1 A side view diagram;

[0011] Figure 3 yes Figure 1 A top-down view;

[0012] Figure 4 This is a schematic diagram illustrating the principle of the present invention in the embodiments;

[0013] Figure 5 This is a schematic diagram of the lap splicing of the pre-bent steel bars in the embodiment;

[0014] In the diagram, 1. Tooling bracket; 1.1. Base frame; 1.2. Bending machine support frame; 1.3. Upper frame; 1.4. Lower frame; 2. Portable bending machine; 2.1. Elbow of the portable bending machine; 3. Roller; 4. Pin hole; 5. Fixed-length steel pipe. Detailed Implementation

[0015] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0016] As attached Figures 1-4 As shown, a tooling for improving the pre-bending quality of main reinforcing bars in a steel cage includes a tooling support 1 and a portable bending machine 2. The tooling support 1 is a frame made of structural steel, comprising a horizontal base frame 1.1 and an upper frame connected to the base frame 1.1. The base frame 1.1 is a rectangular frame structure, and rotatable rollers 3 are provided at the four corners of its bottom, allowing the tooling to be easily moved. The front of the upper frame is an inclined bending machine support frame 1.2 arranged at a certain angle to the base frame 1.1. The bending machine support frame 1.2 is also a rectangular frame structure. The portable bending machine 2 is fixed to the front side of the bending machine support frame 1.2 along its centerline, with the bent end facing downwards. The inclination angle of the bending machine support frame 1.2 coincides with the tangent of the circle containing the center point of the main reinforcing bar to be bent. The portable bending machine 2 is existing technology and is readily available for purchase. A horizontally set fixed-length steel pipe 5 is fixed on the side of the elbow 2.1 of the portable bending machine 2. The length of the fixed-length steel pipe 5 is consistent with the pre-bending length of the reinforcing bar. The fixed-length steel pipe 5 can ensure that the pre-bending length of the reinforcing bar is consistent with the design length.

[0017] In use, this invention involves manually pushing the tooling to the side of the reinforcing cage (which can rotate on the roller) and adjusting its position so that the end of the fixed-length steel pipe 5 aligns with the end of the main reinforcing bar to be bent. This determines the pre-bending length of the reinforcing bar. The bend 2.1 of the portable bending machine 2 corresponds to the starting point of the main reinforcing bar to be bent. The portable bending machine 2 bends the main reinforcing bar by clamping it at the starting point using its bend 2.1. After bending one main reinforcing bar, the next main reinforcing bar can be bent by rotating the reinforcing cage. The portable bending machine ensures that the bending angle and direction of each main reinforcing bar are consistent, and the fixed-length steel pipe 5 ensures that the bending length of the reinforcing bars is consistent, thus guaranteeing the pre-bending quality of the main reinforcing bars in the reinforcing cage.

[0018] The principle of this utility model is:

[0019] As attached Figures 4-5As shown, according to the requirements of the lap welding process for reinforcing cages, the pre-bending direction of the main reinforcement joints should be the tangent direction from the center point of the main reinforcement to its circle; each main reinforcement bar in the reinforcing cage needs to be pre-bent clockwise or counterclockwise towards its tangent direction. The pre-bending angle and length of the reinforcement bars determine whether the main reinforcement bars can be coaxial when lap welding two sections of reinforcing cages. Taking a 20mm diameter, 20cm lap length reinforcement bar as an example: when the pre-bending angle of the joint reinforcement bars is the same at 6°, the two sections of reinforcing cages will be coaxial after connection. Therefore, to ensure the quality of the lap welding of reinforcing cages, the pre-bending direction, angle, and length of the reinforcement bars must be guaranteed. This utility model sets a portable hoop bending machine on the tooling bracket 1. By controlling the tilt angle of the hoop bending machine support frame 1.2 that fixes the portable hoop bending machine and the height and position of the starting point of the hoop bending machine, the requirements of the same pre-bending angle, the same direction, and the same length of the reinforcement bars can be met.

[0020] In the processing and manufacturing of this invention, the actual height and position of the bending point of the reinforcing bar are determined based on the placement and height of the reinforcing bar cage on the roller and the specifications of the reinforcing bar cage. Tooling is then fabricated according to the position of the bending point. The most important aspect of tooling fabrication is controlling the inclination angle of the bending machine support frame and the height and position of the bending point of the bending machine. When the specifications of the reinforcing bar cage change, the tooling should be modified accordingly.

[0021] The upper frame of this invention can be a one-piece structure. To improve the adaptability of the tooling and facilitate adjustment of the position of the portable bending machine 2, the upper frame can also be an adjustable structure: the upper frame includes two parts connected together, namely, an upper frame 1.3 and a lower frame 1.4 connected together. Multiple pin holes 4 are provided at corresponding intervals at the connection points of the upper frame 1.3 and the lower frame 1.4, which are connected as a single unit by pins. The upper frame 1.3 and the lower frame 1.4 are respectively made of insertable square tubing. The portable bending machine 2 is fixed to the upper frame. The upper frame 1.3 and the lower frame 1.4 are connected by selecting the corresponding pin holes 4, allowing adjustment of the height of the portable bending machine 2.

[0022] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A tooling for improving the pre-bending quality of the main reinforcement bars in a steel cage, characterized in that: The equipment includes a tooling bracket and a portable bending machine. The tooling bracket includes a horizontal base frame and an upper frame connected to the base frame. Rollers are installed at the four corners of the base frame. The front of the upper frame is an inclined bending machine support frame arranged at a certain angle to the base frame. The bending machine support frame has a rectangular frame structure. The portable bending machine is fixed to the front side of the bending machine support frame along the center line of the bending machine support frame, and the portable bending machine is set with the bent head facing downwards. The inclination angle of the bending machine support frame is consistent with the tangent of the circle where the center of the bending point of the main reinforcement of the steel cage to be bent is located. A fixed-length steel pipe with the same length as the pre-bending length of the steel reinforcement is fixed to the side of the bent head of the portable bending machine.

2. The tooling for improving the pre-bending quality of the main reinforcement bars of the steel cage according to claim 1, characterized in that: The upper frame consists of two parts that are plugged together. The connection points of the upper and lower parts are provided with multiple pin holes at intervals. The upper and lower parts are connected as one unit by pins. The portable hoop bending machine is fixed on the upper part of the frame.

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