JPS62134121A - Reinforcing method for sheet metal structure - Google Patents

Abstract

PURPOSE:To form the flange part integral to one part of a composing member and to increase the stiffness of the composing member by performing the flange work in the state of heating the work allowance upto the softening temp. by cutting the work allowance by providing it in advance. CONSTITUTION:The processing allowance 2 is subjected to a flange work by press-fitting a forming roll 4 to the processing allowance 2 in the state of pinching a cross frame part 1b by a clamp 3 after heating the processing allowance 2 of the cut structure member 1 to the softening temp. by using a heating means. The processing allowance 2 is subjected to a flange work in about T shape by driving the forming roll 4 which is a grooved roll, for instance, in Y axial direction with turning it. The flange part 1C in the necessary width and sectional shape is obtd. by the flange forming of the processing allowance 2 continuously by moving the forming roll 4 in X axial direction while rotating.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for strengthening a sheet metal structure so as to obtain a sheet metal structure with high rigidity.

Conventional Technology When it comes to reducing the weight of a structure such as the body of a construction machine without reducing its strength, it is necessary to use I-type steel or B-type copper for the structural members.
In many cases, the desired shape is obtained by welding plates.

For example, the main frame af of a structure as shown in Figure 5
In order to reduce the weight without reducing the strength, it is common practice to weld band plates to the upper and lower edges of the main frame α as shown in FIG.

However, the method of obtaining high rigidity by welding requires a large number of weld overlays in the holes to increase the strength of the welded part, etc.
There were problems such as requiring a lot of man-hours and making automation difficult.

This invention was made for the purpose of improving the above-mentioned problems.

Means and effect for solving the problem A processing allowance is provided in advance for the parts that require rigidity of the structural members constituting the sheet metal structure, and then the flange is cut with the processing allowance heated to the softening temperature. By processing,
A 7-rank part integrated with this is molded into a part of the component,
A method for strengthening a sheet metal structure, characterized by strengthening the sheet metal structure by increasing the rigidity of its constituent members.

Embodiments An embodiment of the method of this invention will be described in detail with reference to the drawings. In the figure] is a component that makes up the main frame of a sheet metal structure, such as the body of a construction machine.After cutting a sheet into a predetermined shape, a machining allowance of 2 is left in advance in areas that require strength. Cut. The parts of the component 1 that require strength include the upper and lower edges of the horizontal frame part 1b that is continuous to the rear of the part 1α for mounting the work equipment, and are formed using the method described later to ensure that the required wall thickness is The processing allowance 2 is calculated in advance so as to obtain the obtained value, and the processing allowance 2f corresponding to the obtained value is left on the upper and lower edges of the horizontal frame portion 1h when cutting.

Next, the processing allowance 2 of the component 1 cut as described above
using a heating means such as a heating furnace to a softening temperature, e.g. 80
After heating to 09C or above, as shown in Fig. 2, the horizontal frame portion 1b is clamped with clamps 3, and in this state, a forming roll 4 is pressed onto the machining allowance 2, and the machining allowance 2 is heated to form a flange. Process. The above-mentioned forming roll 4 is, for example, a roll with a minus mark, and while rotating it is driven in the '41+ direction, that is, in the direction of pressurizing the processing allowance 2, so that the processing allowance 2 is approximately T-shaped.
Lunge processing. Please do not rotate the forming roll 4.
It moves in the @ direction, that is, the forming direction, and continuously flanges the machining allowance 2. If the machining allowance 2 is large, the above 7 flange processes are performed in several steps to obtain the desired width and cross section. A shaped flange portion 1c is obtained.

Alternatively, the forming roll 4 may be rotated at a fixed position, the component 1 side may be clamped by the clamp 3, and the forming roll 4 may be moved in the X-axis direction in the next state. Further, the amount of movement of the forming roll 4 in the driving direction and the forming direction is determined in advance by N depending on the material and dimensions of the component 1.
It is also possible to perform 7 lunge machining by inputting it into the C device and controlling the drive-in amount and the movement amount by NC control.

The component 1 obtained as described above is combined with other components to construct a sheet metal structure such as a car body. Since there is a 97 lunge IC formed without
High rigidity can be obtained, and stress will not be concentrated in the welded area.

In the above embodiment, a bracket 5 as shown in FIG. 4, which is often used in construction machinery, etc., is used to explain the following.
It can also be implemented in the same way.

Effects of the Invention As described in detail above, the present invention provides a machining allowance in advance for parts that require rigidity in the structural members constituting a sheet metal structure, and cuts the resulting structural members by setting the machining allowance at the softening temperature. This method forms a clamp part on the edge of the component by heating it to a temperature of 700 degrees and then performing 7-lung processing in the next state, which requires fewer man-hours than conventional methods in which the clamp part is formed by welding. In addition to being easy to fabricate, reliability is also improved because there is no stress concentrated in the welded area. In addition, the driving conditions of the forming rolls and the amount of movement in the forming direction are determined by NC beforehand.
If the information is input into a device or the like and 7-lunge processing is performed under NC control, automation is easy, and automation also enables more accurate molding.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of the constituent members, Fig. 2 is a perspective view showing the 7-lunge processing state, and Fig. 3
The figure is a perspective view of the structure obtained, FIG. 4 is a perspective view showing another embodiment, and FIGS. 5 and 6 are explanatory views of the conventional structure. 1 is a component, 1c is a clamp part, and 2 is a machining allowance.

Claims (1)

[Claims] A processing allowance 2 is provided in advance in the portion of the structural member 1 constituting the sheet metal structure that requires rigidity, and the processing allowance 2 is then cut.
By processing the flange while heating it to a softening temperature, a flange portion 1c integrated with the component 1 is formed on a part of the component 1.
A method for strengthening a sheet metal structure, characterized by forming a sheet metal structure.