A gas path control structure for laser cutting

Abstract

A kind of gas circuit control structure for laser cutting, including high pressure ball valve, high pressure pressure reducing valve, two-way electromagnetic valve, low pressure pressure reducing valve, pressure switch, low pressure filter, low pressure electric proportional valve, check valve and three-way, the high pressure pressure reducing valve at least has two-way outlet, one end is high pressure end, one way of the auxiliary high pressure gas from high pressure end is connected with two-way electromagnetic valve, the other end is low pressure end, one way of the auxiliary high pressure gas from low pressure end is connected with low pressure pressure reducing valve, pressure switch, low pressure filter, low pressure electric proportional valve, two-way electromagnetic valve and check valve in turn.The utility model discloses when using high pressure gas cutting, by controlling only low pressure electromagnetic valve is powered on, selects low pressure gas circuit end to carry out low pressure perforation first, then by controlling only high pressure electromagnetic valve is powered on, selects high pressure gas circuit end to carry out high pressure gas cutting, and then improve the end surface texture effect of plate cutting start, play the effect of controlling high pressure gas to carry out fine cutting.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting technology, specifically to a gas path control structure for laser cutting. Background Technology

[0002] Existing laser cutting processes require switching the pressure of the auxiliary gas according to the material and thickness. Commonly used auxiliary gases include oxygen, compressed air, nitrogen, and argon. The type of auxiliary gas required for cutting different materials is often different. Oxygen is usually used to cut carbon steel, compressed air is used to cut thin plates, and nitrogen is used to cut stainless steel and alloy materials. As the power of lasers increases, the proportion of high-pressure gases, namely compressed air and nitrogen, used in cutting carbon steel plates is increasing.

[0003] When cutting thicker plates, perforation is required first. However, existing gas path control systems lack control over the perforation pressure of the high-pressure gas path, making it impossible to control low-pressure gas perforation and precision cutting during high-pressure gas cutting. Therefore, this invention designs a gas path control structure for laser cutting, which not only controls high-pressure gas for precision cutting but also improves processing efficiency and ensures safe production. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the purpose of this invention is to provide a gas path control structure for laser cutting, solving the problem of how to control low-pressure gas perforation and precision cutting when using high-pressure gas in a laser cutting machine.

[0005] This utility model is achieved through the following technical solution: A gas path control structure for laser cutting includes a high-pressure ball valve, a high-pressure reducing valve, a two-way solenoid valve, a low-pressure reducing valve, a pressure switch, a low-pressure filter, a low-pressure electro-proportional valve, a check valve, and a three-way valve. Auxiliary high-pressure gas is introduced from the inlet of the high-pressure ball valve. The high-pressure reducing valve has at least two outlets, one of which is a high-pressure outlet. One outlet of the auxiliary high-pressure gas from the high-pressure outlet is connected to the two-way solenoid valve, forming outlet I at the outlet of the two-way solenoid valve. The other outlet is a low-pressure outlet. The other outlet of the auxiliary high-pressure gas from the low-pressure outlet is sequentially connected to the low-pressure reducing valve, the pressure switch, the low-pressure filter, the low-pressure electro-proportional valve, the two-way solenoid valve, and the check valve, forming outlet II at the outlet of the check valve. Outlet I and outlet II are respectively connected to two connectors of the three-way valve. The other connector of the three-way valve is connected to the cutting head.

[0006] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model improves the end face texture effect at the beginning of plate cutting by controlling only the low-pressure solenoid valve to be energized and selecting the low-pressure gas path end for low-pressure perforation when using high-pressure gas cutting, and then controlling only the high-pressure solenoid valve to be energized and selecting the high-pressure gas path end for high-pressure gas cutting. This achieves the effect of controlling high-pressure gas for fine cutting. 2. This utility model delves into the timing of the control of each cutting air path during the cutting process. While meeting the requirements of automatic switching between high and low pressure cutting, it adopts a more economical low-pressure electro-proportional valve and low-pressure filter. The cost of the entire air path combination unit is low, avoiding the use of more expensive air path control components such as triple valves / high-flow high-pressure electro-proportional valves / high-pressure filters by competitors. Therefore, it has a certain cost advantage. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the gas path control structure for laser cutting according to this utility model.

[0009] Among them, high-pressure ball valve 1, high-pressure pressure reducing valve 2, two-way solenoid valve 3, low-pressure pressure reducing valve 4, pressure switch 5, low-pressure filter 6, low-pressure electro-proportional valve 7, one-way valve 8, and three-way valve 9. Detailed Implementation

[0010] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0011] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0012] Figure 1 A gas path control structure for laser cutting is shown, including a high-pressure ball valve 1, a high-pressure pressure reducing valve 2, a two-way solenoid valve 3, a low-pressure pressure reducing valve 4, a pressure switch 5, a low-pressure filter 6, a low-pressure electro-proportional valve 7, a one-way valve 8, and a three-way valve 9. Auxiliary high-pressure gas is introduced from the inlet end of the high-pressure ball valve 1, and the high-pressure ball valve 1 controls the on / off of the gas at the inlet end.

[0013] The auxiliary high-pressure gas is split into two ports with different pressures via the high-pressure reducing valve 2. As an embodiment of this utility model, the high-pressure reducing valve 2 has at least two outlets, one of which is the high-pressure end. One outlet of the auxiliary high-pressure gas from the high-pressure end is connected to a two-way solenoid valve 3, forming an outlet I at the outlet of the two-way solenoid valve 3. The other outlet is the low-pressure end. One outlet of the auxiliary high-pressure gas from the low-pressure end is connected in sequence to a low-pressure reducing valve 4, a pressure switch 5, a low-pressure filter 6, a low-pressure electro-proportional valve 7, the two-way solenoid valve 3, and a one-way valve 8, forming an outlet II at the outlet of the one-way valve 8. Outlet I and outlet II are respectively connected to two connectors of a three-way valve 9, and the other connector of the three-way valve 9 is connected to a cutting head.

[0014] The machine tool end cutting air circuit control system designed in this patent has auxiliary gas connected to high-pressure ball valve 1 through the air inlet. High-pressure ball valve 1 controls the on / off of the gas at the air inlet. A two-way solenoid valve 3 is connected to the high-pressure end and connected to the cutting head through a three-way connector. A low-pressure reducing valve 4, a pressure switch 5, a low-pressure filter 6, an electro-proportional valve 7, a two-way solenoid valve 3, and a one-way valve 8 are connected to the low-pressure end in sequence and connected to the cutting head through a three-way connector.

[0015] The working principle of this utility model: Normally, when using high-pressure gas to cut thin plates, there is no need to perform a piercing action. In this case, the entire cutting gas path goes through the high-pressure end, and the pressure is manually controlled by the high-pressure pressure reducing valve 2.

[0016] When using high-pressure gas to cut thicker plates, a piercing action is required. At this time, the entire gas circuit is divided into two parts: the cutting gas circuit goes through the high-pressure end, and the pressure is manually controlled by the high-pressure pressure reducing valve 2; the piercing gas circuit goes through the low-pressure end, and the pressure is controlled by the low-pressure electro-proportional valve 7.

[0017] When using high-pressure gas for precision cutting, the entire gas path must go through the low-pressure end, and its pressure is controlled by the low-pressure electro-proportional valve 7.

[0018] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas path control structure for laser cutting, characterized in that: The system includes a high-pressure ball valve (1), a high-pressure pressure reducing valve (2), a two-way solenoid valve (3), a low-pressure pressure reducing valve (4), a pressure switch (5), a low-pressure filter (6), a low-pressure electro-proportional valve (7), a check valve (8), and a three-way valve (9). Auxiliary high-pressure gas is introduced from the inlet end of the high-pressure ball valve (1). The high-pressure pressure reducing valve (2) has at least two outlets, one of which is the high-pressure end. The auxiliary high-pressure gas from the high-pressure end is connected to the two-way solenoid valve (3), forming an outlet I at the outlet of the two-way solenoid valve (3). The other end is the low-pressure end. The auxiliary high-pressure gas from the low-pressure end is connected in sequence to the low-pressure pressure reducing valve (4), the pressure switch (5), the low-pressure filter (6), the low-pressure electro-proportional valve (7), the two-way solenoid valve (3), and the check valve (8), forming an outlet II at the outlet of the check valve (8). Outlet I and outlet II are respectively connected to two connectors of the three-way valve (9), and the other connector of the three-way valve (9) is connected to the cutting head.

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