Rebar bending apparatus with automatically replaceable dies and method for automatically replacing dies

Abstract

The application discloses a reinforcing steel bar bending equipment capable of automatically replacing a mold and an automatic mold replacement method, and relates to the technical field of reinforcing steel bar bending equipment. The application discloses a reinforcing steel bar bending equipment capable of automatically replacing a mold and an automatic mold replacement method, and relates to the technical field of reinforcing steel bar bending equipment. The base is provided with a rack; a reinforcing steel bar bending machine body is adjustably installed on the base; a workbench of the reinforcing steel bar bending machine body is provided with a containing groove for containing a fixed mold; the fixed mold is provided with a socket hole; a mold ejecting cylinder for jacking the fixed mold and being detachably inserted into the socket hole is installed in the containing groove; a mold frame is slidably installed on the rack and can move along the direction of the workbench top surface; a mold changing cylinder for driving the mold frame is installed on the rack; a plurality of clamping forks for clamping fixed molds of different specifications and models are installed on the mold frame, and the plurality of clamping forks are arranged along the moving direction of the reinforcing steel bar bending machine body. The application solves the problem that the existing reinforcing steel bar bending machine adopts manual replacement of a bending mold fixed mold, thereby reducing the processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a steel bar bending device and an automatic mold changing method that can automatically change molds. Background Technology

[0002] The working principle of steel bar bending is as follows: The steel bar is placed in the groove of the fixed mold on the center line of the bending machine. The moving mold rotates around the fixed mold, so that the steel bar is bent and shaped between the two molds (fixed mold and moving mold).

[0003] Existing rebar bending machines require manual replacement of the fixed bending die when processing rebars of different diameters. Orders often require rebars of varying lengths and diameters in small batches, leading to frequent and time-consuming replacements and low processing efficiency. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, a rebar bending device and an automatic mold changing method are provided to solve the problem of low processing efficiency caused by the manual replacement of bending molds in existing rebar bending machines.

[0005] To achieve the above objectives, a rebar bending device with an automatic mold changing capability is provided, comprising:

[0006] A base on which a frame is mounted;

[0007] The main body of the rebar bending machine is installed on the base in an adjustable position. The worktable of the main body of the rebar bending machine has a receiving groove for accommodating a fixed mold. The fixed mold has a socket hole. A mold discharge cylinder for lifting the fixed mold and detachably inserted into the socket hole is installed in the receiving groove.

[0008] A mold frame is slidably mounted on the machine frame along the table surface direction. A mold-changing cylinder for driving the mold frame is installed on the machine frame. Multiple clamping forks for clamping fixed molds of different specifications and models are installed on the mold frame. The multiple clamping forks are arranged along the moving direction of the rebar bending machine body. When the rebar bending machine body changes the fixed mold, the position of the rebar bending machine body on the base is adjusted so that the position of the fixed mold on the rebar bending machine body corresponds to the position of an unloaded clamping fork on the mold frame. The mold ejection cylinder extends to make the fixed mold extend to the outside of the receiving groove. The mold-changing cylinder extends to make the unloaded clamping fork clamp the fixed mold. The mold ejection cylinder retracts and the position of the rebar bending machine is adjusted so that the mold ejection cylinder is aligned with the fixed mold to be replaced. The mold ejection cylinder extends again to be inserted into the receiving hole of the fixed mold to be replaced. The mold-changing cylinder retracts to separate the clamping fork from the fixed mold to be replaced.

[0009] Furthermore, the main body of the rebar bending machine is inclined.

[0010] Furthermore, after the mold-changing cylinder extends, the distance between the fixed mold on the clamping fork and the table surface is greater than the outer diameter of the reinforcing bar.

[0011] Furthermore, a flange plate is formed in the middle of the fixed mold, and the flange plate is arranged in a circle along the circumferential direction of the fixed mold, and the clamping fork is supported on the flange plate.

[0012] Furthermore, the main body of the rebar bending machine is mounted on the base in an adjustable manner via a linear module.

[0013] Furthermore, the frame is equipped with two opposing end plates, the inner side of the end plates is equipped with guide rails, and the opposite ends of the mold frame are equipped with sliders, which slide on the guide rails.

[0014] Furthermore, the frame has opposing front and rear sides, and the front and rear sides of the frame are respectively suspended on the frame by adjustable length rods.

[0015] Furthermore, the front side of the frame is hinged to the lower end of the boom, and the rear side of the frame is movably mounted to the lower end of the boom.

[0016] This invention provides an automatic mold changing method for a rebar bending device with an automatic mold changing capability, comprising the following steps:

[0017] Adjust the position of the rebar bending machine body on the base so that the fixed mold on the rebar bending machine body corresponds to the position of an unloaded clamping fork on the mold frame;

[0018] The ejector cylinder extends to cause the fixed mold on the main body of the rebar bending machine to extend to the outside of the receiving groove on the worktable of the main body of the rebar bending machine.

[0019] The mold-changing cylinder extends to allow the unloaded clamping fork to clamp the fixed mold on the body of the rebar bending machine;

[0020] The ejector cylinder retracts and readjusts the position of the rebar bending machine so that the ejector cylinder is aligned with the fixed mold to be replaced on the mold frame.

[0021] The ejector cylinder extends again to be inserted into the socket of the mold to be replaced;

[0022] The mold-changing cylinder retracts to separate the clamping fork from the fixed mold to be replaced;

[0023] The mold-changing cylinder retracts to accommodate the mold to be replaced in the receiving groove.

[0024] The beneficial effects of this invention are that the rebar bending equipment with automatic mold changing capability enables unmanned operation of the bending and production switching processes through the automatic mold changing function, thereby improving production efficiency, saving labor, and reducing manual assistance time. Furthermore, this rebar bending equipment with automatic mold changing capability replaces complex linkage and curve contouring movements with simple linear motion, effectively improving the success rate and reducing equipment costs. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a rebar bending device with an automatically changeable mold, according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the mold frame structure according to an embodiment of the present invention.

[0028] Figure 3 This is a top view of the mold frame according to an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the internal structure of the mold frame according to an embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram illustrating the usage state of the rebar bending equipment with automatically changeable molds according to an embodiment of the present invention.

[0031] Figures 6 to 14 This is a schematic diagram illustrating the steps of an automatic mold changing method for a rebar bending device with an automatically changeable mold, according to an embodiment of the present invention. Detailed Implementation

[0032] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Reference Figures 1 to 5 As shown, the present invention provides a rebar bending device with an automatically changeable mold, comprising: a base, a rebar bending machine body 1, and a mold frame 2.

[0035] In this embodiment, the base is a platform. Preferably, the platform is equipped with rollers. A frame 12 is mounted on the base.

[0036] The main body 1 of the rebar bending machine is mounted on the base in an adjustable position. The worktable of the main body 1 of the rebar bending machine has a receiving groove 100 for accommodating the fixed mold 3. The fixed mold has a socket hole 30. A mold discharge cylinder 11 for lifting the fixed mold and detachably inserted into the socket hole 30 is installed in the receiving groove 100.

[0037] The mold frame 2 is slidably mounted on the machine frame 12 along the direction of the workbench surface 10. A mold-changing cylinder 21 for driving the mold frame 2 is installed on the machine frame 12. Multiple clamping forks 22 for clamping fixed molds of different specifications and models are installed on the mold frame 2. The multiple clamping forks 22 are arranged along the moving direction of the rebar bending machine body 1.

[0038] When changing the fixed mold of the rebar bending machine, adjust the position of the rebar bending machine body 1 on the base so that the fixed mold on the rebar bending machine body 1 corresponds to the position of an unloaded clamping fork a on the mold frame 2. The ejection cylinder 11 extends to make the fixed mold extend to the outside of the receiving groove 100. The mold changing cylinder 21 extends to make the unloaded clamping fork a clamp the fixed mold. The ejection cylinder 11 retracts and the position of the rebar bending machine is adjusted so that the ejection cylinder 11 is aligned with the fixed mold b to be replaced. The ejection cylinder 11 extends again to be inserted into the socket 30 of the fixed mold b to be replaced. The mold changing cylinder 21 retracts to make the clamping fork 22 separate from the fixed mold b to be replaced, thus completing the mold changing.

[0039] In a preferred embodiment, the rebar bending machine body 1 is inclined. In this embodiment, a support is formed on the base. The top surface of the support is inclined, so that the worktable surface of the rebar bending machine body is also inclined. The worktable surface is parallel to the top surface of the support.

[0040] In a preferred embodiment, the rebar bending machine body 1 is mounted on the base in an adjustable manner via a linear module. In this embodiment, the rebar bending machine body 1 is mounted on the top surface of the support pier of the base in an adjustable manner via a linear module.

[0041] In this embodiment, the clamping fork has two opposing teeth. The distance between the two teeth is adapted to the outer diameter of the fixed mold. A flange plate 31 is formed in the middle of the fixed mold. The flange plate 31 is arranged in a circle along the circumferential direction of the fixed mold. The clamping fork 22 is supported on the flange plate 31.

[0042] In use, the two fork teeth of the clamping fork are clamped to the outside of the fixed mold, and the flange plate of the fixed mold rests on the fork teeth.

[0043] In a preferred embodiment, two opposing end plates 13 are mounted on the frame 12. Guide rails 14 are mounted on the inner side of the end plates 13. Slider blocks are mounted on opposite ends of the mold frame 2. The sliders slide on the guide rails 14.

[0044] After the mold-changing cylinder 21 extends, the distance (A1) between the fixed mold on the clamping fork 22 and the table surface 10 of the worktable is greater than the outer diameter of the reinforcing bar. (See reference...) Figure 5 As shown, after the mold-changing cylinder retracts, the distance between the fixed mold on the clamping fork 22 and the table surface 10 of the worktable is B1. The guide rail is set at an angle (θ) to the worktable surface.

[0045] Continue reading Figures 1 to 3 The mold frame 2 has a front side and a rear side. The front and rear sides of the mold frame 2 are respectively suspended from the machine frame 12 by adjustable length hangers 23.

[0046] The front side of the mold frame 2 is hinged to the lower end of the lifting rod 23. The rear side of the mold frame 2 is movably mounted to the lower end of the lifting rod 23.

[0047] Specifically, the front side of the mold frame is hinged to the lower end of a lifting rod via hinge 24. The hinge axis is arranged along the length direction of the linear module. Multiple clamping forks are also arranged along the length direction of the linear module. The frame has two opposite sides at its upper end in the length direction and two front and rear sides in the width direction. In this embodiment, two lifting rods are provided on the front side of the frame, and two lifting rods are provided on the rear side of the frame. An ear plate 25 is formed on the rear side of the frame. The ear plate has a slotted hole, and the lower end of the lifting rod slides into the slotted hole. The slotted hole is arranged along the width direction of the frame. The lower end of the lifting rod has an external thread. Two limiting members are screwed onto the lower end of the lifting rod. The two limiting members are respectively provided on the upper and lower sides of the ear plate.

[0048] Reference Figures 6 to 14 As shown, the present invention provides an automatic mold changing method for a rebar bending device with an automatic mold changing capability, comprising the following steps:

[0049] S1: Adjust the position of the steel bar bending machine body 1 on the base so that the fixed mold on the steel bar bending machine body 1 corresponds to the position of an unloaded clamping fork a on the mold frame 2.

[0050] S2: The ejector cylinder 11 extends so that the fixed mold on the main body 1 of the rebar bending machine extends to the outside of the receiving groove 100 on the table surface 10 of the workbench of the main body 1 of the rebar bending machine.

[0051] S3: The mold changing cylinder 21 extends to allow the unloaded clamping fork a to clamp the fixed mold on the main body 1 of the rebar bending machine.

[0052] S4: The ejector cylinder 11 retracts and the position of the rebar bending machine is readjusted so that the ejector cylinder 11 is aligned with the fixed mold b to be replaced on the mold frame 2.

[0053] S5: The ejector cylinder 11 extends again to be inserted into the socket 30 of the fixed mold b to be replaced.

[0054] S6: The mold changing cylinder 21 retracts to separate the clamping fork 22 from the fixed mold b to be replaced.

[0055] S7: The mold changing cylinder 21 retracts so that the fixed mold b to be replaced is accommodated in the receiving groove 100.

[0056] The frame has a triangular cross-section, and diagonal braces in the direction of force ensure sufficient rigidity and improve the repeatability of the frame.

[0057] The machine frame has an end plate at each end, with guide rails and mold-changing cylinders arranged on the inner side of the end plates. The clamping fork is mounted on the mold frame. The mold frame is slidably connected to the guide rails via a slider. During mold changing, the clamping fork reciprocates back and forth along the length of the guide rails. The precision of the guide rails ensures repeatable positioning accuracy during the mold changing process.

[0058] The clamping fork can hold various bending dies; the attached diagram shows three types: die #1, die #2, and die #3. Die #1 is used when producing large-diameter rebar, die #3 is used when producing small-diameter rebar, and die #2 is used for all other processes. The appropriate bending die is selected based on the diameter of the rebar being produced.

[0059] When changing the fixed mold, the fixed mold on the clamping fork must be precisely aligned with the spline shaft at the telescopic end of the mold discharge cylinder of the steel bar bending machine body; otherwise, the inner spline of the fixed mold cannot enter the spline shaft.

[0060] The suspension rods are adjustable in length. Adjusting the length of the suspension rods on the front and rear sides of the frame adjusts the vertical position of the frame, thus ensuring the distance A1 between the fixed mold and the worktable surface (fixed mold changing state). Adjusting the different lengths of the suspension rods on the front and rear sides of the frame adjusts the angle θ between the guide rail and the worktable surface, and makes the bottom surface of the fixed mold parallel to the working surface. By adjusting the guide rail stroke, the position of each mold along the length direction of the mold changing cylinder is aligned with the mold spline shaft.

[0061] The mold changing process mainly involves two states: fixed mold changing and bending operation. In the fixed mold changing state, the mold changing cylinder is extended. The fixed mold must be concentric and coaxial with the spline shaft of the extension end of the ejection cylinder, and the bottom surface of the fixed mold should be as close as possible to the worktable surface (A1) to shorten the stroke of the ejection cylinder and reduce the drop height of the reinforcing bar 4 during feeding. In the bending unloading and bending operation states, the mold changing cylinder is retracted to avoid the trajectory of the reinforcing bar 4 during feeding. Utilizing the angle θ between the guide rail and the worktable surface, the distance between the bottom surface of the bending fixed mold and the working surface increases from A1 to B1 during retraction, where B1 = A1 + L × sinθ (L is the stroke of the mold changing cylinder). When B1 is greater than the diameter of the reinforcing bar 4, the trajectory of the reinforcing bar unloading process can be avoided.

[0062] Therefore, the rebar bending device of the present invention with automatic mold changing replaces complex curved motion and linkage mechanism with simple linear motion, so as to realize the function of automatic mold changing.

[0063] The rebar bending equipment of the present invention, with its automatic mold-changing function, enables unmanned operation of the bending and production transition processes, improving production efficiency, saving labor, and reducing manual assistance time. Furthermore, the automatic mold-changing rebar bending equipment of the present invention replaces complex linkage and curved contouring movements with simple linear motion, effectively improving the success rate and reducing equipment costs.

[0064] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An automatic mold changing method for a rebar bending device with an automatic mold changing capability, characterized in that, Rebar bending equipment with automatic mold changing capability includes: A base on which a frame is mounted; The main body of the rebar bending machine is installed on the base in an adjustable position. The worktable of the main body of the rebar bending machine has a receiving groove for accommodating a fixed mold. The fixed mold has a socket hole. A mold discharge cylinder for lifting the fixed mold and detachably inserted into the socket hole is installed in the receiving groove. A mold frame is slidably mounted on the machine frame along the table surface direction. A mold-changing cylinder for driving the mold frame is installed on the machine frame. Multiple clamping forks for clamping fixed molds of different specifications and models are installed on the mold frame. The multiple clamping forks are arranged along the moving direction of the rebar bending machine body. When the rebar bending machine body changes the fixed mold, the position of the rebar bending machine body on the base is adjusted so that the fixed mold on the rebar bending machine body corresponds to the position of an unloaded clamping fork on the mold frame. The mold ejection cylinder extends to make the fixed mold extend to the outside of the receiving groove. The mold-changing cylinder extends to make the unloaded clamping fork clamp the fixed mold. The mold ejection cylinder retracts and the position of the rebar bending machine is adjusted so that the mold ejection cylinder is aligned with the fixed mold to be replaced. The mold ejection cylinder extends again to be inserted into the socket of the fixed mold to be replaced. The mold-changing cylinder retracts to separate the clamping fork from the fixed mold to be replaced. The automatic mold changing method for a rebar bending machine with automatic mold changing capability includes the following steps: Adjust the position of the rebar bending machine body on the base so that the fixed mold on the rebar bending machine body corresponds to the position of an unloaded clamping fork on the mold frame; The ejector cylinder extends to cause the fixed mold on the main body of the rebar bending machine to extend to the outside of the receiving groove on the worktable of the main body of the rebar bending machine. The mold-changing cylinder extends to allow the unloaded clamping fork to clamp the fixed mold on the body of the rebar bending machine; The ejector cylinder retracts and readjusts the position of the rebar bending machine so that the ejector cylinder is aligned with the fixed mold to be replaced on the mold frame. The ejector cylinder extends again to be inserted into the socket of the mold to be replaced; The mold-changing cylinder retracts to separate the clamping fork from the fixed mold to be replaced; The mold-changing cylinder retracts to accommodate the mold to be replaced in the receiving groove.

2. The automatic mold changing method of the rebar bending equipment with automatic mold changing capability according to claim 1, characterized in that, The main body of the rebar bending machine is tilted.

3. The automatic mold changing method of the rebar bending equipment with automatic mold changing capability according to claim 1, characterized in that, After the mold-changing cylinder extends, the distance between the fixed mold on the clamping fork and the table surface is greater than the outer diameter of the reinforcing bar.

4. The automatic mold changing method of the rebar bending equipment with automatic mold changing capability according to claim 1, characterized in that, A flange plate is formed in the middle of the fixed mold, and the flange plate is arranged in a circle along the circumferential direction of the fixed mold. The clamping fork is supported on the flange plate.

5. The automatic mold changing method of the rebar bending equipment with automatic mold changing capability according to claim 1, characterized in that, The main body of the rebar bending machine is installed on the base in an adjustable position via a linear module.

6. The automatic mold changing method of the rebar bending equipment with automatic mold changing capability according to claim 1, characterized in that, The frame is equipped with two opposing end plates, and guide rails are installed on the inner side of the end plates. Slider blocks are installed at opposite ends of the mold frame, and the sliders slide on the guide rails.

7. The automatic mold changing method of the rebar bending equipment with automatic mold changing capability according to claim 1, characterized in that, The frame has a front side and a rear side, and the front and rear sides of the frame are respectively suspended on the frame by adjustable length rods.

8. The automatic mold changing method of the rebar bending equipment with automatic mold changing capability according to claim 7, characterized in that, The front side of the frame is hinged to the lower end of the boom, and the rear side of the frame is movably mounted to the lower end of the boom.

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