JP3205593U - Equipment for bending pipe materials - Google Patents

Abstract

An object of the present invention is to provide a bending apparatus for improving the accuracy of a bent part by previously weaving into a receiving mold of a bending machine by an action of returning to the original shape by spring back of parallel parts at both ends of a U-shaped bent part of a pipe material. provide. A processing work table 3 is installed on a flat surface on the upper surface of a machine frame, a pressing ram 4 that moves and reciprocates in a notch 9 of the processing work table is disposed, and a pressing ram is opposed to the processing work table. In a processing apparatus in which a receiving die 11 provided with a pair of receivers 12 is attached to bend a pipe material or the like, the top of the bent part is applied to absorb the springback in one step of U-shaped bending. A structure is provided in which the plate 19 and the left and right cam brackets 16 are pressed, the pair of receiving molds 11 are rotated in the closing direction, and the U-shaped bent pipe member or the round bar member is further pressed inward. [Selection] Figure 2

Description

The present invention relates to an apparatus for bending pipe material and round bar material. For example, it relates to the improvement of processing equipment for U-shaped bent parts of pipe materials and round bars used for small and lightweight machine parts such as farming machines, especially processing that has parallel parts at both ends of U-shaped bent parts. Regarding improvement of accuracy.

Various ideas and inventions related to pipe bending have been proposed. For example, as a simple hand-type bender, a configuration is known in which a predetermined curvature is obtained by advancement and receiving of a ram piston of a hydraulic cylinder (Patent Documents 1 and 2). In addition, a technique is known in which a plurality of dies having different bending radii of pipe material products can be held in a specific order by upper and lower dies of a press machine and processed into a predetermined processing shape (Patent Document 3). Further, a technique is disclosed in which a pipe material is bent into a U-shape, and then the corner is bent into a small R shape in a concave shape in another process (Cited document 4).

Utility Model Public Notice No.45-15248 JP 54-31074 A Japanese Patent No. 5286506 Japanese Patent No. 3759502

The techniques disclosed in the above-described known patent documents 1 and 2 try to achieve a predetermined shape by a plurality of repeated pressing operations of the hydraulic cylinder with a simple manual configuration. Japanese Patent No. 5286506 of Patent Document 3 prepares a plurality of press machine dies, moves the die laterally each time, and obtains a predetermined shape through a pressing process again by a vertical cylinder. . Japanese Patent No. 375902 of Patent Document 4 also requires another process of correction work after the U-shaped bending process. However, the present invention will improve the accuracy of the bent parts by pre-weaving the variation of the U-shaped bent part of the pipe material into the receiving mold of the bending machine in advance by the spring back of the parallel parts at both ends. It is what.

The present invention seeks to improve the accuracy of the machined part in one step by weaving the variation to return to the original shape by the spring back of the parallel part at both ends of the U-shaped bent part of the pipe material in advance in the receiving mold. The processing work table is installed on a flat surface on the upper surface of the machine frame according to claim 1, and a pressing ram that moves and reciprocates in a notch portion of the processing work table is disposed on the processing work table. In a processing device for bending a pipe material or a round bar attached to a receiving mold provided with a pair of receivers against the pressing ram, in order to absorb the spring back in one step of U-shaped bending, An apparatus for bending a pipe material or the like, wherein the pipe material or the round bar is bent in a U-shape and has a structure for pressing inward both ends parallel portions.
Further, the receiving die described in claim 2 has a base formed by being divided into two on the moving center line of the pressing ram, and has a cam bracket elastically attached by a coil spring behind both of them, In order to absorb the change of the spring back set in advance, the pair of receivers are inward by the action of the tops of the bent parts of the pipe material or the round bar material bent into a U shape pressing the left and right cam brackets. 2. A processing apparatus for bending a pipe material or the like according to claim 1, wherein the bending apparatus is configured to rotate in a straight line.

The processing apparatus for bending a pipe material or the like according to the present invention includes a means for pressing the pipe material in parallel with both ends in a pressing process for bending the pipe material into a U-shape, and has a spring back portion that can disperse the shape. Since it is absorbed and formed, the processing accuracy of the U-shaped part is improved and the manufacturing cost is reduced in one process of bending the pipe material into a U-shape. In addition, by the action of pressing the left and right cam brackets of the base on which the top of the U-shaped molded part is pressed, the pair of receivers rotate inward and automatically return after molding, so continuous bending can be performed. Efficient.

External view with one part omitted Bending section perspective view Explanatory drawing at the start of bending Drive explanation diagram Bending process top view Useless push operation plan view during bending Base operation diagram with cam bracket Illustration of springback of bent parts

Form for solving the idea

In the form of the present invention, a processing work table is installed on a flat surface on the upper surface of the machine frame, and a pressing ram that moves back and forth in a notch portion of the processing work table is disposed, and the pressing ram is opposed to the processing work table. In a processing apparatus for bending a pipe material or a round bar with a receiving mold provided with a pair of receivers, in order to absorb the spring back in one step of U-shaped bending, A pipe material or round bar bending apparatus characterized by comprising a configuration in which both ends of the bent pipe material or round bar material are further pressed inward.

The configuration of the present invention will be described with reference to the drawings. FIG. 1 shows an external view in which one part is omitted. A processing work table 3 is installed on the upper surface of a box-shaped machine frame 2, and a pressing ram 4 reciprocates in the center of the processing work table 3. A moving notch 9 is provided. The processing work table 3 is provided with a mounting hole 8 which is formed in a plane over the entire surface and for mounting the receiving die 11. Reference numeral 5 denotes a hydraulic cylinder, and the pressing ram 4 is fixed to the rod end 6 via a connecting plate 23 which is arranged in parallel below the hole of the notch 9 and is provided on the rod end 6. Ten pressing dies are fixed to the upper surface of the pressing ram 4. A hydraulic pump unit 7 supplies oil from the hydraulic cylinder 5 described above. Reference numeral 11 denotes a receiving mold with a part omitted. The receiving die 11 is divided into two with respect to the moving center of the pressing ram 4 that reciprocates through the notch 9. Reference numeral 13 denotes a rotating boss, and reference numeral 12 denotes a receiver for forming a pipe material. Reference numeral 16 denotes a cam bracket located at the center rear portion of the receiving die 11.
FIG. 2 is a perspective view of the bending portion, in which the pressing die 10 reciprocates through the hole of the notch 9, and the receiving die 11 is divided and arranged with respect to the moving center line of the notch 9. That is, the receiving die 11 is provided with a receiver 12 and a cam bracket 16 symmetrically on the upper surfaces of the divided left and right bases 14, and is fixed to be rotatable about a spindle screw 18 as a fulcrum. Reference numeral 17 denotes an upper surface plate that guides the pivoting action of the support screw 18 and the cam bracket 16 described above. The twelve receptacles are in the shape of a prism having four planes and are fixed by a holding screw 22 so as to be rotatable. Reference numeral 20 denotes a mounting hole of the receiver 12 which is selected depending on the radius of the U-shaped part. Reference numeral 21 denotes a coil spring which is elastically attached to the left and right cam brackets 16 toward the center. Reference numeral 15 denotes an auxiliary shaft, and the base 14 is attached to the processing work table if necessary. Reference numeral 19 denotes a contact plate which is installed on the front surface of the cam bracket 16 and adjusts the thickness according to the shape of the processed part.
FIG. 4 is an explanatory view of driving, and the pressing ram 4 is fixed via a connecting plate 23 fixed to the rod end 6 of the hydraulic cylinder 5, and the pressing ram 4 reciprocates through the notch hole 9. The pressing die 10 fixed to the upper surface of the pressing ram 4 is selected in accordance with a desired U-shaped size and appropriately adjusted in height. The 14 bases are rotatably fixed to the machining work table 3 by 18 spindle screws. The twelve receptacles are rotatably fixed to the base 14 by a holding screw 22.
FIG. 3 is an explanatory view at the time of starting the bending process, and shows a state in which the pipe member 24 is installed immediately before the receiver 12 provided on the base 4 of the receiving mold 11 divided into two. A U-shape is formed while being in close contact with the flat portion. Reference numeral 25 denotes a guide hole provided in the upper surface plate 17, which guides and regulates when the cam bracket 16 rotates. A through-shaft 26 passes through the left and right cam brackets 26 and supports the coil spring 21. In this embodiment, the pipe member 24 is used as a bending member, but if necessary, a round bar also has the same effect.
FIG. 5 shows a plan view of a processed state in which the pipe member 24 is bent into a U-shape (half-circle). A-B indicates a movement center line of the pressing ram 4, and the left and right coil springs 21 are in a state where the cam bracket 16 is crimped.
FIG. 6 shows an operation in which the pressing die 10 further advances from the half-round machining state of FIG. 5 to push the parallel part inwardly. A spring back generated during bending of the parallel parts at both ends of a U-shaped part such as a pipe material is measured in advance, and is shown in a state where both ends are further pressed inward. In this embodiment, the spring back portion is set to 5 degrees to 6 degrees, the top portion of the pipe material 24 bent in a U shape presses the cam bracket 16, and the base is set to F1, with 18 support shaft screws as fulcrums, The receiver 12 is pressed inward by 5 degrees by rotating in the direction of F2.
FIG. 7 is a diagram showing a base operation by the cam bracket 16. When the cam bracket 16 is pressed to the top of a U-shaped part, the base 14 arranged symmetrically has an arrow with 18 spindle screws as fulcrums. Are rotated in the directions of f1 and f2 to operate the pair of receivers 12 inward. In addition, the pair of receivers 12 are rotated inward by the action of pressing the left and right cam brackets 16 of the base on which the tops of the U-shaped molded parts 24 are elastically attached, and automatically return to the initial state by the coil spring 21 after the molding process. Therefore, continuous bending can be performed and it is efficient.
FIG. 8 is an explanatory view of a springback of a processed bent part. When the pipe member 24 is bent into a U shape by a conventional method, when the processing tool is separated, the parallel portion is restored to the original shape by 5 degrees (C ) Indicates a state of returning outward.

The bending apparatus for pipe material and the like of the present invention is utilized as a highly versatile bender jig tool for manufacturing U-shaped processed parts of pipe material and round bar material at machining sites in the machining industry and construction industry.

DESCRIPTION OF SYMBOLS 1 Pipe material etc. bending apparatus 2 Machine frame 3 Processing work table 4 Pressing ram 5 Hydraulic cylinder 6 Rod end 7 Hydraulic pump unit 8 Mounting hole 9 Notch 10 Stamping die 11 Receiving die 12 Receiving element 13 Rotating boss 14 Base 15 Auxiliary shaft 16 Cam bracket 17 Upper surface shaft 18 Support shaft screw 19 Contact plate 20 Receiver mounting hole 21 Coil spring 22 Holding screw 23 Connecting plate 24 Pipe material 25 Guide hole 26 Through shaft

Claims (2)

A processing work table is installed on the upper surface of the machine frame, and a pressing ram that moves and reciprocates in a notch portion of the processing work table, and a pair of receivers against the pressing ram on the processing work table. In a processing apparatus for bending a pipe material or a round bar attached with a receiving mold provided with
In order to absorb and form the spring back in one step of U-shaped bending, the pipe member or the round bar material bent in a U-shape is further pressed inward at both ends. Bending equipment for pipe materials, etc. The receiving mold has a base formed by being divided into two on the moving center line of the pressing ram, and has a cam bracket elastically attached by a coil spring behind both of them, and a change amount of a preset spring back. In order to absorb this, a pair of receivers rotate inward by the action of the top of the bent part of the pipe material or round bar material bent into a U shape pressing the left and right cam brackets. Item 1. An apparatus for bending a pipe material or the like according to Item 1.

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