JP2001170813A - Cutting device for metal plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate chamfering work of outer peripheral surfaces of both ends at the time of molding a pipe and to reduce manufacturing costs accordingly. SOLUTION: This cutting device is formed of a pair of lower blades 2 arranged with a specified interval and a cutting blade 3 arranged on upper parts of these lower blades, this cutting blade 3 is provided free to move in the vertical direction and free to insert and extract between a pair of the lower blades 2 and it is formed free to cut the metal plate 17 placed on a pair of the lower blades by the cutting blade.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for cutting a metal plate,
More specifically, the present invention relates to a metal plate cutting device that can eliminate the need for chamfering the outer peripheral surfaces of both ends of a pipe when the pipe is formed from a metal plate cut to a predetermined length.

[0002]

2. Description of the Related Art When a pipe is formed from a metal plate 30 cut to a predetermined length, the metal plate 30 can be cut by, as shown in FIG. A so-called "sharing method" is adopted in which the upper blade 32 is lowered and cut while being placed on the upper part of the base 31.

[0003]

However, when the long metal plate 30 is cut to a predetermined length by the above-described shearing, the cut metal plate 30 is connected to one end as shown in FIG. 5B. The upper surface 30a of the other end is shaped like an arc.
b becomes an acute angle. For this reason, when a pipe is formed from such a metal plate, there has been a problem that the outer peripheral surface at the end of one of the pipes has an acute angle and it is necessary to perform chamfering.

The present invention solves the above-mentioned problems, and in particular, it is possible to eliminate the need for chamfering the outer peripheral surfaces of both ends when a pipe is formed, thereby reducing the production cost. It is an object to propose a cutting device.

[0005]

Means for Solving the Problems As means for solving the above problems, a metal plate cutting device according to the present invention comprises a pair of lower blades arranged at a predetermined interval and an upper portion of the lower blades. The cutting blades are formed by the arranged cutting blades, and the cutting blades are vertically movable and are provided between the pair of lower blades so as to be freely inserted / removed, and the metal placed on the pair of lower blades The plate is formed so as to be cut by the cutting blade.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an apparatus for cutting a metal plate according to the present invention. The apparatus 1 for cutting a metal plate includes a pair of lower blades 2 made of metal arranged at a predetermined interval. It is mainly constituted by a metal cutting blade 3 arranged above the lower blade 2.

A metal lower blade support member 4 is disposed outside the pair of lower blades 2, and the lower blade support member 4 and the lower blade 2 are fixed by bolts 5. Also,
The lower blade 2 and the lower blade support member 4 are mounted on a metal base 6, and the base 6 is fixed to a base 7 by bolts 8. The lower blade support member 4 is fixed to the base 6 by bolts (not shown).

Next, as shown in FIG. 2, the cutting blade 3 has a concave shape and its opening is directed downward.
The cutting blade support member 11 is fixed to a metal base 13 disposed on the upper portion thereof by bolts 14 while being supported by a bolt 12 at the center thereof. The tip of the cutting blade 3 is formed flat. Further, the base 13 is fixed to a base 15 arranged thereon by a plurality of bolts 16.

In a cutting blade support member 11 on both sides of the cutting blade 3, a metal plate for holding a metal plate 17 mounted on the lower blade 2 and the lower blade support member 4 and cut is provided. The two plate holding members 21 and 22 are housed up and down at predetermined intervals, and the upper plate holding member 21 is fixed to the cutting blade support member 11 by bolts 23. Also,
The lower plate holding member 22 is suspended from the upper plate holding member 21 by a plurality of bolts 24 so as to be vertically movable.

As shown in FIGS. 1 and 2, the lower blade 2 and the lower blade supporting member 4 are provided on the opposing surfaces of the lower plate pressing member 22 disposed on both sides of the cutting blade 3 in the cutting blade supporting member 11. In order to prevent the cutting blade 3 from rattling when cutting the metal plate 17 placed on the upper part, an oil metal 20 made of gunmetal is provided.

A coil spring 25 is wound around a bolt 24 between the upper plate holding member 21 and the lower plate holding member 22, and the lower plate holding member 22 is actuated by the elastic force of the coil spring 25. Is always urged downward, and is provided such that the distal end surface of the plate pressing member 22 and the distal end of the cutting blade 3 are flush with each other as shown in FIG.

Since the metal plate cutting device 1 is constructed as described above, first, as shown in FIG. 1, a long metal plate is mounted on the lower blade 2 and the lower blade support member 4 as shown in FIG. In a state where the plate 17 is placed, the base 15 is pressed by hydraulic means (not shown), so that the plate holding members 21 and 22 are lowered together with the cutting blade 3, and the lower plate holding member 2
2, the metal plate 17 is pressed.

Next, when the base 15 is further pressed, the lower plate holding member 22 is raised against the bias of the coil spring 25 as shown in FIG. The blade 3 is pressed and inserted between the pair of lower blades 2. The metal plate 17 is cut into a predetermined length by the cutting blade 3 as shown in FIG. It is formed in an arc shape.

Therefore, when the pipe 26 as shown in FIG. 4 is formed from the cut metal plate 17, the outer peripheral surfaces at both ends of the pipe 26 do not need to be chamfered at all.

As described above, according to the metal plate cutting apparatus 1, when the long metal plate 17 is cut into a predetermined length, the cut upper surfaces 17a are formed in an arc shape. Therefore, the pipe 26 is cut by the cut metal plate 17.
When the is formed, the outer peripheral surfaces at both ends of the pipe 26 do not need to be chamfered at all, and the manufacturing cost can be reduced.

Further, since the step of chamfering can be omitted, the working efficiency can be improved and the working time can be shortened, which is economical.

[0018]

As described above, according to the metal plate cutting device of the present invention, a pair of lower blades arranged at a predetermined interval and a cutting blade arranged above the lower blade are provided. This cutting blade is movable in the vertical direction and is provided between the pair of lower blades so as to be freely inserted / removed, and the metal plate mounted on the pair of lower blades is formed by the cutting blade. Since it is formed so as to be cut, the upper surfaces at both ends of the cut metal plate can be formed in an arc shape.

Further, when the pipe is formed from the cut metal plate, the outer peripheral surfaces at both ends of the pipe do not need to be chamfered at all, so that the manufacturing cost can be reduced and the chamfering process is performed. Since the step of performing the process can be omitted, the working efficiency is improved and the time is shortened, so that it is economical.

[Brief description of the drawings]

FIG. 1 is a front view of a metal plate cutting apparatus according to the present invention.

FIG. 2 is an explanatory view of a main part of the metal plate cutting device shown in FIG. 1;

FIG. 3 is a perspective view of the metal plate cut by the metal plate cutting device.

4 is a front view of a pipe formed by the metal plate shown in FIG. 3 in a partially broken state.

5A is a front view of a conventional metal plate cutting device, and FIG. 5B is a perspective view of a metal plate cut by the cutting device.

[Explanation of symbols]

 Reference Signs List 1 metal plate cutting device 2 pair of lower blades 3 cutting blade 17 metal plate

Claims (1)

[Claims] 1. A cutting blade is formed by a pair of lower blades arranged at a predetermined interval and a cutting blade disposed above the lower blade. A metal plate cutting device, which is provided between the lower blades so as to be freely inserted and removed, and is formed so that the metal plate placed on the pair of lower blades can be cut by the cutting blade.