A stable and fast positioning numerical control plasma cutting machine

Abstract

The utility model discloses a quick positioning type numerical control plasma cutting machine of stable operation belongs to plasma cutting machine field. The utility model relates to a quick positioning type numerical control plasma cutting machine of stable operation, including ground contact base, install the object support on the ground contact base. The utility model solves the following influence its stable operation and cutting efficiency's remarkable defect that the existing numerical control plasma cutting machine has, and the molten metal that plasma cutting is blown off by high pressure airflow can cool and solidify at the bottom and the edge of the incision when cutting off the metal, forms the hard slag. If these slags accumulate on the cutting path, when the cutting head passes subsequently or carries out the precision cutting, possibly has the physical collision with the cutting head, leads to the cutting head height mutation, destroys the stability of plasma arc, and the quality of incision falls slightly, and heavy causes the arc to break, leads to the processing interruption, and the cleaning slag is generally after the equipment shutdown and relies on the manpower to clean, and the cleaning mode passive and inefficient problem.

Description

Technical Field

[0001] This utility model relates to the field of plasma cutting machines, specifically a stable and fast-positioning CNC plasma cutting machine. Background Technology

[0002] A CNC plasma cutting machine is a modern processing device that uses the heat of a high-temperature plasma arc to melt metal and then blows the molten metal away with a high-speed airflow to achieve cutting. Its core component, the plasma cutting head, under the precise control of a CNC system, can perform high-speed, complex cutting operations along a preset path, and is widely used in metal processing, machinery manufacturing, steel structures, and other fields.

[0003] Existing CNC plasma cutting machines suffer from the following significant drawbacks affecting their stable operation and cutting efficiency: When plasma cutting metal, the molten metal blown off by the high-pressure gas flow cools and solidifies at the bottom and edges of the cut, forming hard slag. If this slag accumulates on the cutting path, it may physically collide with the cutting head when it passes by or performs precision cutting, causing a sudden change in the cutting head height and disrupting the stability of the plasma arc. This can result in reduced cut quality and dimensional deviations, or even arc interruption and processing disruption. Furthermore, slag removal is typically done manually after the equipment has stopped, a passive and inefficient method. Utility Model Content

[0004] The purpose of this invention is to provide a stable and fast-positioning CNC plasma cutting machine that can actively and promptly remove slag and fumes near the cutting head, thereby ensuring stable operation and fast positioning, and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stable and rapidly positioning CNC plasma cutting machine, comprising a ground base, a support frame mounted on the ground base, first lead screws arranged parallel to each other on both sides of the support frame, a first slider cooperating on the first lead screw, a first fixed base mounted on the first slider, a second lead screw mounted on the first fixed base, a second slider cooperating on the second lead screw, a second fixed base mounted on the second slider, a plasma cutting head mounted on the second fixed base, a nozzle provided at the end of the plasma cutting head, and an air knife dust removal mechanism. The air knife dust removal mechanism includes a collar, a fixing block, a damping bearing, a connecting plate, an air knife body, and a fan. The collar is sleeved on the plasma cutting head, and its inner wall is provided with anti-slip patterns. It is locked and fixed to the plasma cutting head by at least one fixing bolt. The fixing block is fixedly connected to the outer wall of the collar. The damping bearing is installed on the fixing block. One end of the connecting plate is rotatably connected to the damping bearing, and the other end is fixedly connected to the air knife body. The air knife body is provided with an air inlet and a slit-type air outlet. The fan is connected to the air inlet through a pipe. The slit-type air outlet is inclined downward and points to the area to be cut below and in front of the nozzle.

[0006] Furthermore, a protective net is installed at the air inlet.

[0007] Furthermore, the length direction of the air knife body is parallel to the axis of the plasma cutting head, and its length is greater than the diameter of the nozzle.

[0008] Furthermore, the damping bearing provides a damping force that keeps the air knife body in its current position when no external force is applied.

[0009] Furthermore, the first lead screw is driven by a first drive motor to move the first slider and the first fixed base above it in the longitudinal direction.

[0010] Furthermore, the second lead screw is driven by a second drive motor, which is used to move the second slider, the second fixed base above it, and the plasma cutting head in the lateral direction.

[0011] Furthermore, the fan is installed at the air inlet position of the air knife body.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention achieves real-time removal of molten slag and dust during the cutting process through an air knife dust removal mechanism, effectively preventing collisions between the cutting head and molten slag, ensuring the stability of the plasma arc. It adopts a mechanical dust removal method, which is simple and reliable in structure, requires no additional control system, improves the continuous operation time and cutting efficiency of the equipment, and reduces manual cleaning time. The damping bearing enables flexible adjustment and stable maintenance of the air knife angle, adapting to different cutting conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall external structure of this utility model; Figure 2 This is a schematic diagram of the overall main structure of this utility model; Figure 3 This is a top view of the overall structure of this utility model; Figure 4 This is a schematic diagram of the air knife dust removal structure of this utility model.

[0014] In the diagram: 1. Ground contact base; 2. Support rack; 3. First lead screw; 301. First slider; 4. First fixed base; 401. Second lead screw; 5. Second slider; 6. Second fixed base; 7. Plasma cutting head; 8. Nozzle; 9. Collar; 901. Anti-slip pattern; 902. Fixing bolt; 903. Fixing block; 904. Damping bearing; 905. Connecting piece; 906. Air knife body; 907. Air inlet; 908. Protective net; 909. Fan; 910. Slit-type air outlet. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] To address the significant drawbacks of existing CNC plasma cutting machines that affect their stable operation and cutting efficiency, this embodiment provides the following technical solution: During plasma cutting, molten metal blown off by the high-pressure gas flow cools and solidifies at the bottom and edges of the cut, forming hard slag. If this slag accumulates on the cutting path, it may physically collide with the cutting head when it subsequently passes by or performs precision cutting, causing abrupt changes in the cutting head height and disrupting the stability of the plasma arc. This can result in reduced cut quality and dimensional deviations, or even arc interruption and processing disruption. Furthermore, slag removal typically relies on manual labor after equipment shutdown, a passive and inefficient method. Example 1: As Figures 1-4 As shown, the present invention provides a stable and fast-positioning CNC plasma cutting machine, including a ground base 1, a support frame 2 mounted on the ground base 1, a first lead screw 3 arranged parallel on both sides of the support frame 2, a first slider 301 fitted on the first lead screw 3, a first fixed base 4 mounted on the first slider 301, a second lead screw 401 mounted on the first fixed base 4, a second slider 5 fitted on the second lead screw 401, a second fixed base 6 mounted on the second slider 5, and a plasma cutting head 7 mounted on the second fixed base 6. The end of the plasma cutting head 7 is provided with a nozzle 8.

[0017] Its innovation lies in the inclusion of an air knife dust removal mechanism, which comprises a collar 9, a fixing block 903, a damping bearing 904, a connecting piece 905, an air knife body 906, and a fan 909. The collar 9 is fitted onto the plasma cutting head 7, its inner wall having an anti-slip pattern 901, and is locked to the plasma cutting head 7 by at least one fixing bolt 902. The fixing block 903 is fixedly connected to the outer wall of the collar 9, and the damping bearing 904 is mounted on the fixing block 903. One end of the connecting piece 905 is rotatably connected to the damping bearing 904, and the other end is fixedly connected to the air knife body 906. The air knife body 906 is provided with an air inlet 907 and a slit-type air outlet 910. The fan 909 is connected to the air inlet 907 via a pipe, and the slit-type air outlet 910 is angled downwards and points towards the area to be cut below and in front of the nozzle 8.

[0018] During operation, the process is as follows: When the CNC system starts the cutting program, the first drive motor and the second drive motor drive the first lead screw 3 and the second lead screw 401 respectively, causing the plasma cutting head 7 to move rapidly to the cutting starting point. Simultaneously, the blower 909 starts working, delivering high-pressure airflow through pipes to the air knife body 906. The airflow is ejected from the slit-type air outlet 910, forming a high-speed, flat fan-shaped air curtain. As the plasma cutting head 7 begins cutting and moves along the predetermined path, this air curtain remains in front of the cutting head, pre-blowing away the molten slag and pervasive smoke and dust accumulated along the cutting path, creating a clean working environment for the cutting head. The damping force provided by the damping bearing 904 ensures that the air knife body 906 maintains a stable angle during equipment operation, and can rotate appropriately when subjected to external impacts to avoid damage.

[0019] Please refer to Example 2 Figure 1 - Figure 4 Based on Embodiment 1, in order to further improve the dust removal effect and equipment durability, the key components of this utility model have been reinforced in terms of materials and structure.

[0020] The air knife body 906 is made of 316L stainless steel to improve its high-temperature resistance and corrosion resistance. The protective mesh 908 uses a finer stainless steel mesh to enhance its filtration capacity for foreign objects. The damping bearing 904 has been upgraded to a self-sealing, preload-adjustable bearing to adapt to damping requirements under different operating conditions. The fan 909 is a high-pressure eddy current fan to provide a more stable and powerful airflow.

[0021] When in operation, its working mechanism is exactly the same as that in Embodiment 1. The reinforced material enables the air knife dust removal mechanism to work stably in higher temperature cutting environments, the fine protective mesh 908 can effectively prevent finer particles from entering the air duct, the adjustable damping bearing 904 makes the air knife angle more precise and reliable, and the high-pressure vortex fan ensures that effective purging can be maintained even when cutting thicker plates and generating a large amount of smoke and dust.

[0022] The working principle described above can be summarized as follows: After the operator sets the cutting parameters and starts the equipment through the CNC system, the drive system, such as the first lead screw 3, the first slider 301, the second lead screw 401, and the second slider 5, drives the plasma cutting head 7 to perform rapid and precise positioning and movement. During the cutting process, the plasma arc melts the metal to form a cut, while simultaneously generating slag and dust. At this time, the high-speed airflow generated by the synchronously activated air knife dust removal mechanism, such as the fan 909, the air knife body 906, and the slit-type air outlet 910, acts like a "mobile cleaner," continuously blowing away contaminants in front of and around the cutting head. The entire system, through the collaborative working mode of "mechanical motion achieving precise positioning and airflow purging ensuring environmental cleanliness," ensures that the plasma cutting head 7 always works in the optimal environment, thereby achieving long-term, high-quality, and stable operation of the equipment.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stable and fast-positioning CNC plasma cutting machine, comprising a ground base (1), a support frame (2) mounted on the ground base (1), a first lead screw (3) arranged parallel to both sides of the support frame (2), a first slider (301) fitted on the first lead screw (3), a first fixed base (4) mounted on the first slider (301), a second lead screw (401) mounted on the first fixed base (4), a second slider (5) fitted on the second lead screw (401), a second fixed base (6) mounted on the second slider (5), a plasma cutting head (7) mounted on the second fixed base (6), and a nozzle (8) provided at the end of the plasma cutting head (7); Its features are: It also includes an air knife dust removal mechanism, which includes a collar (9), a fixing block (903), a damping bearing (904), a connecting piece (905), an air knife body (906), and a fan (909); the collar (9) is sleeved on the plasma cutting head (7), its inner wall is provided with anti-slip patterns (901), and it is locked and fixed to the plasma cutting head (7) by at least one fixing bolt (902); the fixing block (903) is fixedly connected to the outer wall of the collar (9); the damping bearing (904) is also included. The bearing (904) is mounted on the fixed block (903); one end of the connecting piece (905) is rotatably connected to the damping bearing (904), and the other end is fixedly connected to the air knife body (906); the air knife body (906) is provided with an air inlet (907) and a slit-type air outlet (910); the fan (909) is connected to the air inlet (907) through a pipe; the slit-type air outlet (910) is inclined downward and points to the area to be cut below and in front of the nozzle (8).

2. The stable and rapid positioning CNC plasma cutting machine according to claim 1, characterized in that: A protective net (908) is installed at the air inlet (907).

3. The stable and rapid positioning CNC plasma cutting machine according to claim 2, characterized in that: The length of the air knife body (906) is parallel to the axis of the plasma cutting head (7), and its length is greater than the diameter of the nozzle (8).

4. The stable and rapid positioning CNC plasma cutting machine according to claim 3, characterized in that: The damping bearing (904) provides a damping force that keeps the air knife body (906) in its current position when no external force is applied.

5. A stable, rapid positioning CNC plasma cutting machine according to claim 4, characterized in that: The first lead screw (3) is driven by the first drive motor and is used to move the first slider (301) and the first fixed base (4) above it in the longitudinal direction.

6. The stable and rapid positioning CNC plasma cutting machine according to claim 1, characterized in that: The second lead screw (401) is driven by the second drive motor to move the second slider (5), the second fixed base (6) above it, and the plasma cutting head (7) in the lateral direction.

7. A stable, rapid positioning CNC plasma cutting machine according to claim 6, characterized in that: The fan (909) is installed at the air inlet (907) of the air knife body (906).

Images