SU969476A1 - Cutting table for thermal cutting of metal plates - Google Patents

Description

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The invention relates to the production of cutting parts for sheet metal with laser, flame-arc and gas-oxygen machines, and can find 1) application both in the shipbuilding industry and in other sectors of the national economy.

The known shearing frame, which is a platform, in the upper part of which are installed interchangeable lattice blocks, directly on the surface of which is carried out the production of sheet metal parts | 1J

The disadvantage is that due to the open lattice on the sides, it is not possible to carry out an efficient gas extraction from the thermal cutting zone of the metal, thus creating unfavorable conditions at the workplace, especially when carrying out the cutting process using plasma arc machines that produce toxic emissions. .

A table for thermal cutting of sheet material, made in the form of a hopper-like frame, on the front and side walls of which there are rectangular windows, which are not necessary for carrying out a gas extractor, is known. Pallets are installed at the bottom of the frame for collecting small waste and slag. When cutting material laid on the surface of the grids, more gas is passed through

10 slits of the slit and through the suction windows the fans are drawn out and aspirated into the atmosphere or fed into the cleaning devices 27.

The disadvantage of this table is that during operation from the impact of the jet of flame and the direct effect of the supply of hot slag to the waste on the surface of the sub-frame the metal structure

Twenty pallets are deformed, as a result of which between the bottom of the frame and the pallet of the pallet, slots are formed, and of considerable size, the presence of which adversely affects the efficiency of the gas suction and working conditions. Also known is a cutting table for thermally cutting metal sheets, containing a frame with windows for suctioning gases, removable grilles for sheets placed on the frame, and also trays for waste 3J. The famous table (frame) has the following disadvantages. Under production conditions, the sheet metal rolling onto the surface of the grate is made at a certain distance from the edge of the side of the frame. This open space is necessary for the operation of the rigging. On the other hand, atmospheric air is more intensively drawn into this space, which reduces the efficiency of the gas suction directly from the cut sheet. In addition, the gas suction along the entire length of the slot requires the use of large capacities of ventilation systems. Due to the large temperature difference that occurs inside the water tray and outside, due to the impact on the surface with hot gas, waste and a jet of flame, the design of the tray undergoes significant deformations and also loses tightness of fit. The purpose of the invention is to increase the efficiency of the suction of gases from the cutting zone by increasing the tightness of the adjacent pallets to the frame. The goal is achieved by the fact that the bottom of each pallet is made of elastic heat-resistant material and there are plates-zervs strung to the bottom of the frame, while the table is equipped with guides mounted on the side walls of the frame at each window for suction at an acute angle to the bottom of the frame . FIG. 1 shows the opening frame of the opening; on .fig. 2 is a section A-A in FIG. one; in fig. 3 - section Bb-B in FIG. 2; in fig. 4 shows a section B-B in FIG. 3. The cutting table consists of a frame 1, which is a welded metal structure. The length of the frame is divided into sections. In the upper part of each section of the frame, removable grids 2 are installed, on the surface of which metal sheets 3 are placed to be cut. On the side walls of the frame, there is a window 4 through which the gas suction pump is performed during the cutting process. The upper side of the window has a guide code 5, fixed at an angle of -4 to the horizontal plane, creating a directional flow that allows an intensive gas suction from remote areas of the internal space of the cutting table, thereby reducing gas pollution in the workplace. The pallet 6 consists of plates-louvers 7. The tip {ozi of the lower plane, fastened with a cloth 8, made of elastic heat-resistant material), for example an asbestos cloth. The canvas is tightly attached to the edges of the opening 9 of the frame bottom. The plate-louver and the blade are fastened to the edges of the frame bottom opening using a stud 10 with shoulder 11 aprkina 12 and a nut 13. A stud bolt performs a constant tight pressing of the blade. When mounted in the initial position, the louver plate is pressed against the collar 11, the studs 10 by the spring 12, while the spring is in an uncompressed position. Sheets 3 are laid on the racks 2 and are cut. In the event of a deformation, the louver plate compresses the spring 12, moving along the axis 14 of the stud 10, while the web 8 remains tightly to the bottom of the frame, ensuring constant sealing of the bottom of the frame. The use of the cutting table of the proposed design will increase the efficiency of the gas extractor from the thermal cutting of metal, reduce gas pollution in the workplace and improve working conditions. Invention formula cutting table for thermal cutting of metal sheets containing a frame with a bottom and side walls, as well as with windows for suction gases, removable. sheet grilles, rezmeshenny., on the frame, as well as pallets for cutting waste, characterized in that, in order to increase the efficiency of suction of gases from the cutting zone, by increasing the tightness of the pallets to the frame, the bottom of each pot is made of elastic heat-resistant material and there are plates which are spring-loaded to the bottom of the skeleton. zi, while the table is equipped with guiding peaks zepleplennymi on the side walls of the frame at each window for suction gases at an acute angle to the bottom of the frame. 5 Sources of information 4) taken into account during the examination 1. USSR Author's Certificate No. 479602, cl. B 23 K 37 / O4, 15.05,73.

A 1

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9694766, 2 - USSR Copyright Certificate / j 632513 cl B 23 K 7 / O2 15.06.77. 3. USSR author's certificate 5; No. 453271, cl. B 23 K 37 / O4 24.11.72 (prototype).

Claims (1)

SUMMARY OF THE INVENTION A cutting table for thermal cutting of metal sheets, comprising a frame with a bottom and side walls, as well as windows for exhausting gases, removable. different lattices for sheets, fixed ^ on the frame, as well as trays for cutting waste, characterized in that, in order to increase the efficiency of exhausting gases from the cutting zone, by 15 donors to the frame, the bottom of each pallet is made of heat-resistant elastic material and on it are located spring-loaded to the bottom of the frame plate-sting-. with peaks mounted on the side walls of the frame at each window for exhausting gases at an acute angle to the bottom of the frame.