Processing method of box-shaped arm section, box-shaped arm section and concrete pump truck arm frame

Abstract

The invention discloses a processing method of a box-shaped arm section. The processing method comprises the following steps: a cutting forming step, a first bending step, a second bending step and a closed connection step, wherein in the cutting forming step: a sheet material is cut to form a cutting forming plate; in the first bending step: a first web forming part (2) and a second web forming part (2') are bent relative to a base plate forming part (3) of the cutting forming plate; in the second bending step: the edges of a first top plate forming part and a second top plate forming part are mutually contacted or are opposite through the first top plate forming part (6) and the second top plate forming part (7) of the bending cutting forming plate of the first web forming part and the second web forming part; and in the closed connection step: the edges of the first top plate forming part and the second top plate forming part are mutually connected, so as to form the box-shaped arm section. In addition, the invention also provides a box-shaped arm section and a concrete pump truck arm frame. The processing method of the box-shaped arm section is simple in process, and is convenient for guaranteeing the processing quality; the processing working procedures and the processing time are obviously reduced; and the working efficiency is improved.

Description

technical field [0001] The invention relates to a method for processing a boom, in particular to a method for processing a box-shaped boom section. In addition, the present invention also relates to a box-shaped boom section formed by the above box-shaped boom section processing method and a concrete pump truck boom formed by connecting the box-shaped boom sections. Background technique [0002] Box-shaped boom sections are widely used in construction machinery such as concrete pump trucks and cranes. For example, the boom frame of concrete pump trucks includes multi-section box-shaped boom sections hinged in turn, and the telescopic boom of truss cranes can include multi-section boxes that can be slid in turn. Arm section. [0003] It should be noted here that the "box-shaped jib section" referred to by those skilled in the art mainly refers to the closed box-shaped cross section of the main body of each jib section constituting the jib, which is not strictly limited to re...

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Problems solved by technology

[0007] The disadvantages of the box-shaped jib section processing method in the prior art are obvious. Specifically, first, the processing procedure is complicated, positioning is difficult, assembly is difficult, and processing quality is difficult to ensure; second, the welding workload is large, and the abdomen The welding length of the plate, the bottom plate and the top plate is long, the required welding workload is huge, and it is not conducive to ensuring the welding quality; third, the damage to the plate of the box-shaped jib section is increased, for example, because the existing processing methods need to be connected with the web Welding the plate will obviously increase the damage to the web, affect the structural strength, and easily cause welding deformation, which is detrimental to the service life of the box-shaped jib section and the jib composed of the box-shaped jib section; Fourth, due to A large number of welding connections are used, which not only consumes high energy consumption, but also increases processing costs, and is not conducive to environmental protection

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