1. Field of the invention
The present invention relates to a method for manufacturing a shell of a metallic cabinet, more particularly one, according to which a cabinet shell is made by means of folding a metal plate and joining two ends of the metal plate together such that the shell has a simple structure, and manufacturing cost, and time and labor taken in assembling will reduce.
2. Brief Description of the Prior Art
Referring to
The conventional shell has a disadvantage that it consists of many parts. Consequently, the manufacturing cost is relatively high, and it takes much time and labor to assemble the shell.
It is a main object of the present invention to provide an improvement on a shell of a metallic cabinet to overcome the above disadvantage. The method of the present invention includes: folding two ends of a metal plate form fitting portions at the two ends, bending the metal plate and making the fitting portions engage each other to change the metal plate into a semi-finished shell, pressing the fitting portions against each other such that the fitting portions become flat to closely touch each other, and bending upper and lower ends of the semi-finished shell inwards to form inward annular fitting protrusions thereon, shaping the semi-finished shell by means of exerting outward force on inner portions of the semi-finished shell, and punching a front side of the semi-finished shell to form an opening thereon. After the shell is finished, a cover and a base are respectively secured to the upper and the lower ends with engaging bumps, which are formed near to edges of the cover and the base, engaging the fitting protrusions of the shell.
The present invention will be better understood by referring to the accompanying drawings, wherein:
Referring to FIGS. 1 to 7, a preferred embodiment of a method for manufacturing a shell 1 of a metallic cabinet includes the following steps:
(1) folding two ends of a metal plate 11 so that fitting portions 12 and 13 are formed at the two ends, as shown in
(2) bending the metal plate 11 and making the fitting portions 12 and 13 engage each other to join the two ends of the metal plate 11 together, as shown in
(3) pressing the fitting portions 12 and 13 against each other with great force such that the portions 12 and 13 become flat to closely touch each other, and bending upper and lower ends of the semi-finished shell inwards such that the semi-finished shell has inward annular fitting protrusions 14 and 15 at the upper and the lower ends thereof respectively, as shown in
(4) shaping the semi-finished shell for the same to have four flat sides by means of exerting outward force on inner portions of the semi-finished shell, as shown in
(5) forming an opening 16 on a front side of the semi-finished shell by means of a punch press so that the shell 1 is finished, as shown in
Referring to
Referring to
From the above description, it can be easily understood that metallic cabinet shells made according to the method of the present invention has much simpler structure than conventional ones as described in Background, and the manufacturing cost, and time and labor needed in assembling will reduce.