CN105728886A - Flame cutting technology - Google Patents

Abstract

The invention discloses a flame cutting technology which comprises the steps that (1) hoisting is carried out; (2) distances among different cutting guns are adjusted according to differences between an automatic cutting manner and a semi-automatic cutting manner; (3) cutting parameters are adjusted according to a plate thickness; (4) before gas cutting, dirt on the surface of a steel materials is removed; (5) during cutting of a thick plate, a preheating flame shall be strong, the gas cutting airflow length shall be 1/3 larger than the thickness of a work piece, an inclined angle of about 10-20 DEG is formed between a cutting torch and the surface of the work piece, and part edges are heated uniformly; and (6) in order to prevent gas cutting deformation, the following aspects shall be noticed during operations. (6.1) When work pieces of different dimensions are cut on a steel plate, smaller work pieces shall be cut before bigger work pieces; (6.2) When a narrow and long bar-shaped plate is cut, segments which are 50 mm away from the two length ends are reserved and not cut, and the segments are cut after the long edge is cut, or a symmetric cutting method with multiple cutting torches is adopted; and (6.3) during straight-bar cutting, flame strength of each cutting torch shall be consistent, otherwise sidewise bending can take place easily. The technology disclosed by the invention has the advantages that processes are rational; and manufacture cost is low.

Description

A kind of flame cutting technique

Technical field

The present invention relates to a kind of flame cutting technique.

Background technology

Existing flame cutting technique exists that procedure arrangement is unreasonable, operation is various, and technological parameter selects unreasonable, and the collocation of each technological parameter is unreasonable and operator's skill requirement is higher so that production cost is higher, product quality is on the low side, yield rate is not high.

Summary of the invention

Because the drawbacks described above of prior art, the technical problem to be solved be to provide a kind of operation rationally, the flame cutting technique of low cost of manufacture.

For achieving the above object, the invention provides

A kind of flame cutting technique, is characterized in that: comprise the steps:

1), when carrying out surface trimming, hang steel plate to gas cutting platform, the range difference of the monolateral two ends of steel plate and guide rail should be adjusted within the scope of 5mm；When carrying out semi-automatic cutting, guide rail should be placed in the plane of cut steel plate, then cutting machine be put down gently on guide rail；Make the side of cutting torch towards operator, select cutting torch according to the thickness of steel plate, adjust the straight degree of cutting and cutting speed.

2) difference, according to surface trimming and semi-automatic cutting mode, adjusts the distance of each burning torch, it is determined that drag, and considers cutting gap compensation；In cutting process, the size and Orientation at burning torch inclination angle is mainly determined with steel plate thickness, when carrying out slab gas cutting, cutting torch keeps vertical with surface of the work, and after whole section cuts through, mobile cutting torch, proceeds to normal gas cutting, should slightly slow down when gas cutting will be reached home, make otch bottom cut off completely；

3), cutting parameter is adjusted according to thickness of slab, cutting parameter includes the energy etc. of cutting torch model, oxygen pressure, cutting speed and pre-thermal-flame, the main type according to gas cutting machinery of selection of technological parameter and the steel plate thickness that can cut, to the steel plate not cut, answer the similar steel plate of test tapping, determine cutting parameter, check simultaneously and cut nozzle gas patency；

4), remove the dirt of steel surface, oils and fats before gas cutting, and reserve certain space below, be beneficial to the blowout of slag；During gas cutting, the movement of cutting torch should remain a constant speed, and is advisable with 2 ~ 5mm in cutter member surface distance flame core tip, and distance too closely can make cutting shoulder along fusing, too remote shortage of heat, easily makes cutting interrupt；

5), when carrying out thick plates cutting, pre-thermal-flame wants big, and gas cutting air-flow length is beyond the 1/3 of thickness of workpiece；Cutting torch about becomes 10 ° ~ 20 ° inclination angles with surface of the work, makes part edge thermally equivalent；

6), in order to prevent gas cutting from deforming, it should be noted that the following aspects in operating process:

6.1), when cutting various sizes of workpiece on steel plate, should first cut smallclothes, after cut big part；

6.2) cutting of long narrow stripe board, length two ends reserve 50mm and do not cut, and are cutting off behind complete long limit to be cut, or the method adopting the symmetrical cutting of many cutting torches.

6.3) it should be noted that the flame power of each cutting cutting torch should be consistent during vertical bar cutting, side sway otherwise it is easily generated.

The invention has the beneficial effects as follows: operation of the present invention is reasonable, low cost of manufacture, each parameter collocation reasonable coordination, it is possible to be effectively improved product quality and production efficiency.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

A kind of flame cutting technique, comprises the steps:

1), when carrying out surface trimming, hang steel plate to gas cutting platform, the range difference of the monolateral two ends of steel plate and guide rail should be adjusted within the scope of 5mm.When carrying out semi-automatic cutting, guide rail should be placed in the plane of cut steel plate, then cutting machine be put down gently on guide rail.Make the side of cutting torch towards operator, select cutting torch according to the thickness of steel plate, adjust the straight degree of cutting and cutting speed.

2) difference, according to surface trimming and semi-automatic cutting mode, adjusts the distance of each burning torch, it is determined that drag, and considers cutting gap compensation；In cutting process, the size and Orientation at burning torch inclination angle is mainly determined with steel plate thickness, when carrying out slab gas cutting, cutting torch keeps vertical with surface of the work, and after whole section cuts through, mobile cutting torch, proceeds to normal gas cutting, should slightly slow down when gas cutting will be reached home, make otch bottom cut off completely.

3), cutting parameter is adjusted according to thickness of slab, cutting parameter includes the energy etc. of cutting torch model, oxygen pressure, cutting speed and pre-thermal-flame, the main type according to gas cutting machinery of selection of technological parameter and the steel plate thickness that can cut, to the steel plate not cut, answer the similar steel plate of test tapping, determine cutting parameter, check simultaneously and cut nozzle gas patency.

4), remove the dirt of steel surface, oils and fats before gas cutting, and reserve certain space below, be beneficial to the blowout of slag.During gas cutting, the movement of cutting torch should remain a constant speed, and is advisable with 2 ~ 5mm in cutter member surface distance flame core tip, and distance too closely can make cutting shoulder along fusing, too remote shortage of heat, easily makes cutting interrupt.

5), when carrying out thick plates cutting, pre-thermal-flame wants big, and gas cutting air-flow length is beyond the 1/3 of thickness of workpiece.Cutting torch about becomes 10 ° ~ 20 ° inclination angles with surface of the work, makes part edge thermally equivalent.

6), in order to prevent gas cutting from deforming, it should be noted that the following aspects in operating process:

6.1), when cutting various sizes of workpiece on steel plate, should first cut smallclothes, after cut big part；

6.2) cutting of long narrow stripe board, length two ends reserve 50mm and do not cut, and are cutting off behind complete long limit to be cut, or the method adopting the symmetrical cutting of many cutting torches.

6.3) it should be noted that the flame power of each cutting cutting torch should be consistent during vertical bar cutting, side sway otherwise it is easily generated.

Claims (1)

1. a flame cutting technique, is characterized in that: comprise the steps:

1), when carrying out surface trimming, hang steel plate to gas cutting platform, the range difference of the monolateral two ends of steel plate and guide rail should be adjusted within the scope of 5mm；When carrying out semi-automatic cutting, guide rail should be placed in the plane of cut steel plate, then cutting machine be put down gently on guide rail；Make the side of cutting torch towards operator, select cutting torch according to the thickness of steel plate, adjust the straight degree of cutting and cutting speed;

2) difference, according to surface trimming and semi-automatic cutting mode, adjusts the distance of each burning torch, it is determined that drag, and considers cutting gap compensation；In cutting process, the size and Orientation at burning torch inclination angle is mainly determined with steel plate thickness, when carrying out slab gas cutting, cutting torch keeps vertical with surface of the work, and after whole section cuts through, mobile cutting torch, proceeds to normal gas cutting, should slightly slow down when gas cutting will be reached home, make otch bottom cut off completely；

3), cutting parameter is adjusted according to thickness of slab, cutting parameter includes the energy etc. of cutting torch model, oxygen pressure, cutting speed and pre-thermal-flame, the main type according to gas cutting machinery of selection of technological parameter and the steel plate thickness that can cut, to the steel plate not cut, answer the similar steel plate of test tapping, determine cutting parameter, check simultaneously and cut nozzle gas patency；

4), remove the dirt of steel surface, oils and fats before gas cutting, and reserve certain space below, be beneficial to the blowout of slag；During gas cutting, the movement of cutting torch should remain a constant speed, and is advisable with 2 ~ 5mm in cutter member surface distance flame core tip, and distance too closely can make cutting shoulder along fusing, too remote shortage of heat, easily makes cutting interrupt；

5), when carrying out thick plates cutting, pre-thermal-flame wants big, and gas cutting air-flow length is beyond the 1/3 of thickness of workpiece；Cutting torch about becomes 10 ° ~ 20 ° inclination angles with surface of the work, makes part edge thermally equivalent；

6), in order to prevent gas cutting from deforming, it should be noted that the following aspects in operating process:

6.1), when cutting various sizes of workpiece on steel plate, should first cut smallclothes, after cut big part；

6.2) cutting of long narrow stripe board, length two ends reserve 50mm and do not cut, and are cutting off behind complete long limit to be cut, or the method adopting the symmetrical cutting of many cutting torches;

6.3) it should be noted that the flame power of each cutting cutting torch should be consistent during vertical bar cutting, side sway otherwise it is easily generated.