JPH05305474A - Thermal cutting machine - Google Patents

Abstract

PURPOSE:To automate the carrying in and out of a workpiece and the sorting of products from scrap by arranging a conveyor, roller and clamp on a work table. CONSTITUTION:The workpiece A is carried in by the conveyor 4, raised by a work lifter 8, moved in the direction of the Y axis, clamped at both ends of the workpiece A by a clamp 10 and cut. During the cutting operation, band plates 4d, 4e are pushed down by a retreating roller 15. Fine scraps generated during the operation are dropped through the grid like band plates 4d, 4e, and collected into a scrap box 18 by a scrap conveyor 17. When the cutting of the workpiece A is completed, the workpiece A is raised by a lift cylinder 11 and by the clamp 10 provided on both sides of the conveyor 4, and therefore only the cut-out product (a) is left on the conveyor 4. By turning the conveyor 4, the product (a) is easily retrieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal cutting machine such as a laser machine or a plasma machine.

[0002]

2. Description of the Related Art Conventionally, in a thermal cutting machine of this type, a sword table is often used to place a work to be cut. This sword mountain table is provided with a large number of sharp sword mountains to support the work from below by these sword mountains. The flow of assist gas is good during cutting and the laser beam is not reflected, so highly accurate cutting is possible. It has the advantage that it can be processed. However, the Kenzan table often tilts, especially when cutting a small workpiece, and as a result, the nozzle and torch of the machining head interfere with each other, resulting in damage to the nozzle and torch. .. A work table in which metal strips are arranged in a corrugated form, such as the one described in Japanese Patent Publication No. 3-31548, has been proposed as a solution to such a problem.

[0003]

However, in the above-mentioned conventional work table, since the corrugated strip plate on which the work is placed is damaged during cutting of the work, the strip plate must be frequently replaced, which is uneconomical. In addition, since the cut product and the scrap both remain on the work table, there is a problem that the work efficiency is poor because the work for sorting these after cutting is required. The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a thermal cutting machine that can easily carry in and carry out works and does not require sorting work after cutting. ..

[0004]

In order to achieve the above object, the present invention is capable of moving in the X-axis direction orthogonal to the Y-axis by a processing nozzle unit which is movable in the Y-axis direction along the frame of the main body. In the thermal cutting machine designed to cut the work on the work table provided in
The work table 3 is provided with a conveyor constituted by arranging the strip plates 4d and 4e between endless chains 4b, and the work table is loaded and unloaded with the conveyor. On the moving line of the processing nozzle unit, a retracting roller that pushes down the belt plate of the conveyor that has reached the cutting position, and a clamp that clamps a workpiece to be cut on both sides of the conveyor and lifts it after cutting are provided.

[0005]

[Operation] With the above configuration, the work can be automatically carried in and out after cutting by the conveyor, and by lifting the work by the clamp, the product and the scrap can be sorted and carried out by the conveyor.
Further, since the belt strip of the conveyor which has reached the cutting position is pushed down by the retracting roller, it is not cut together with the work.

[0006]

Embodiment An embodiment of the present invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 denotes a main body of a thermal cutting machine such as a laser processing machine, and a frame 1c is horizontally mounted on a bed 1a via a column 1b. A processing nozzle unit 2 that is movable in the up-down direction (Z-axis direction) is provided, and a laser beam is emitted toward a work A on a work table 3 from a nozzle 2 a that projects from the lower portion of the processing nozzle unit 2. It has become so. The work table 3 is provided movably in the X-axis direction on a bed 1d installed in the X-axis direction orthogonal to the frame 1c below the frame 1c, and has a conveyor 4 for loading and unloading the work A. ing.

The conveyor 4 has an endless chain 4b which is rotated by a conveyor motor (not shown) inside both side plates 4a arranged on both sides, and the upper side of these chains 4b is projected from the side plate 4a. Support member 4c
It is supported from below by a large number of support rods 5 which are vertically movably supported. As shown in FIG. 2, each of the supporting rods 5 is urged upward by a compression spring 6 so that the supporting portions 5a at the upper ends thereof have the same height, and the chains 4b elastically supported by these supporting rods 5 are supported. Long strips 4d are horizontally provided at equal intervals in the X-axis direction. And these strips 4d
Strips 4e having a length that does not reach the adjacent strips 4d are alternately projected on both sides of the strips 4d, 4d.
A lattice-shaped work mounting portion is formed by e.

A work lifter 8 used for positioning the carried-in work A in the Y-axis direction is installed below the work placing portion. The work liter 8 is shown in FIG.
As shown in FIG.
A rotary shaft 8a (only a book is shown) has a base end portion of a plurality of support rods 8c provided with a free bearing 8b at the upper end fixed thereto. The lever 8 is attached to the end of each rotary shaft 8a.
The operating cylinder 9 is connected via d, and by rotating the rotary shaft 8a by these operating cylinders 9,
Each supporting rod 8c can be raised from the standby position shown by the solid line in FIG. 3 to the use position shown by the phantom line.

On the other hand, a plurality of clamps 10 are attached to both side plates 4a of the conveyor 4 at intervals in the X-axis direction as shown in FIG. These clamps 10 are shown in FIG.
As shown in FIG. 3, between the movable claw 10a and the fixed claw 10b, which are mounted on the support member 12 which is vertically movable by the lift cylinder 11 so as to be movable in the Y-axis direction by the retracting cylinder 13, and which are opened and closed by the clamp cylinder 14. The end of the work 4 can be clamped with. A pair of retracting rollers 15 are rotatably supported on the lower surface of the frame 1c of the main body 1 on the moving line of the processing nozzle unit 2 and above the chain 4b of the conveyor 4. These retreat rollers 15 prevent the strip plate 4d from being damaged during the cutting of the work A by pushing down the strip plate 4d reaching the movement line of the processing nozzle unit 2 via the chain 4b. There is. In the figure, 17 is a scrap conveyor provided below the conveyor 4, 18 is a scrap box for collecting the scrap discharged by the scrap conveyor 17, and 19 is a product box for collecting the product a carried out by the conveyor 4.

The operation will now be described. When the work A to be processed is carried into the predetermined position by the conveyor 4, the support rod 8c of the work lifter 8 is moved by the lift cylinder 9 as shown in FIG.
The work A is pushed up from below by the support rods 8c via the free bearings 8b. Then, in this state, the work A is moved in the Y-axis direction by a pushing mechanism (not shown), and after the positioning in the Y-axis direction is performed, both ends of the work A are gripped by the clamp 10. Thereafter, the NC device (not shown) controls the movement of the work table 3 in the X-axis direction and the processing nozzle unit 2 in the Y-axis direction to start the cutting of the work A on the conveyor 4 and the processing nozzle unit during cutting. The strip 4d reaching the line of movement 2 is pushed down by the retracting roller 15 via the chain 4b, so that the strips 4d, 4e are emitted by the laser or plasma emitted from the nozzle 2a.
Can be prevented from being cut.

Further, the fine scraps generated during the processing are scraped from between the grid strips 4d and 4e by the scrap conveyor 17
It is dropped onto the top and collected in the scrap box 18 by the scrap conveyor 17. When the cutting of the work A is completed as described above, the clamps 10 provided on both sides of the conveyor 4 grip the both ends of the work A, and the lift cylinder 11 moves the work A onto the conveyor 4 as shown in FIG. Lift up. As a result, only the cut-out product a remains on the conveyor 4, so that the conveyor 4 is rotated to drop the product a on the conveyor 4 into the product box 18 and collect the product a in the product box 18. When the collection of the product a on the conveyor 4 is completed, the clamp 10 is lowered to remove the scraped work A and the conveyor 4.
It is placed on the top again and carried out by the conveyor 4. The work A can be continuously cut by repeating the above operation.

[0012]

As described above in detail, according to the present invention, when the work is cut, the belt strip of the conveyor on which the work is placed is pushed down by the retracting roller and is separated from the lower surface of the work, so that the work is cut. Never. This is economical because there is often no need to replace the band plate, and the band plate does not impair the flow of assist gas or disturb the laser or plasma, so that highly accurate cutting can be performed. In addition, since the conveyor can automatically carry in the work and carry it out after cutting, the thermal cutting machine can be automatically operated, and the scraps of the product can be sorted and carried out. There is also an effect that work is unnecessary.

[Brief description of drawings]

FIG. 1 is a perspective view of a thermal cutting machine according to an embodiment of the present invention.

FIG. 2 is a detailed view of a conveyor that conveys a work.

FIG. 3 is a detailed view of a work lifter.

FIG. 4 is a perspective view of clamps provided on both sides of the conveyor.

FIG. 5 is a detailed view of a clamp.

FIG. 6 is a detailed view of the vicinity of a retracting roller.

[Explanation of symbols]

1 ... Main body, 1c ... Frame, 2 ... Processing nozzle unit,
3 ... work table, 4 ... conveyor, 4c ... chain,
4d, 4e ... Strip plate, 10 ... Clamp, 15 ... Retracting roller.

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B23K 37/04 Y 7011-4E

Claims (1)

[Claims] 1. A work A on a work table 3 movably provided in an X-axis direction orthogonal to the Y-axis by a machining nozzle unit 2 which is movable in the Y-axis direction along a frame 1c of a main body 1. In the thermal cutting machine configured to perform cutting, the work table 3 is provided with a conveyor 4 configured by arranging strips 4d and 4e between endless chains 4b in a grid pattern. The work A is carried into and out of the conveyor 3 by the conveyor 4, and the retracting roller 1 for pushing down the strip 4d of the conveyor 4 which has reached the cutting position on the moving line of the processing nozzle unit 2.
Work A to be cut on both sides of the conveyor 4
A thermal cutting machine which is provided with a clamp 10 for clamping and lifting after cutting.