A cutting machine

Abstract

The utility model discloses a cutting machine, including high frequency ac circuit, transformer, control module and secondary rectification output circuit, and transformer includes secondary winding and at least two seriesly arranged primary winding, the primary winding is connected with the output end of high frequency ac circuit through winding switching device, winding switching device and control module electric connection, winding switching device has cutting mode and manual welding mode, secondary rectification output circuit includes secondary rectification circuit, output circuit, positive terminal block and negative terminal block, the input of secondary rectification circuit is electric connection with secondary winding, and the output is electric connection with positive terminal block and negative terminal block respectively. The utility model has welding function and common secondary rectification output circuit, and one or more primary winding in transformer is connected with high frequency ac circuit through winding switching device control, thereby realizes the no -load voltage that output satisfies cutting or manual welding required, and the whole structure is simple, and control is stable and reliable, and it is convenient and low in cost to install.

Description

Technical Field

[0001] This utility model relates to the field of welding machine technology, and in particular to a cutting machine. Background Technology

[0002] For cutting machines with manual welding function, the rated working voltage for cutting is higher than that for manual welding because cutting and manual welding have different requirements for open-circuit voltage.

[0003] In order to solve the above problems, the existing technology uses a separate rectification method for the cutting machine, that is, by using transformers with different secondary windings, and matching them with two separate secondary rectification circuits, output circuits and wiring sockets; however, such a structure not only makes the welding machine circuit structure complex, but also makes it difficult to use, control and install, but also increases the cost.

[0004] Therefore, in order to solve the above problems, it is necessary to develop a cutting machine with welding function and a shared secondary rectifier output circuit. It uses transformers with different primary windings and changes the mode through a winding switching device to make the transformer electrically connected to a high-frequency AC circuit through one or more series-connected secondary windings, thereby outputting an open-circuit voltage that meets the requirements of cutting or manual welding. The overall structure is simple, the control is stable and reliable, the installation is convenient and the cost is low. Utility Model Content

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A cutting machine includes a high-frequency AC circuit, a transformer, a control module, and a secondary rectifier output circuit, characterized in that:

[0007] The transformer includes a secondary winding and at least two primary windings connected in series;

[0008] The primary winding is connected to the output terminal of the high-frequency AC circuit via a winding switching device.

[0009] The winding switching device is electrically connected to the control module, and the winding switching device has a cutting mode and a manual welding mode;

[0010] In the cutting mode, the transformer is connected to a high-frequency AC circuit through one of its primary windings;

[0011] In the manual welding mode, the transformer is connected to a high-frequency AC circuit through multiple primary windings connected in series.

[0012] The secondary rectifier output circuit includes a secondary rectifier circuit, an output circuit, a positive terminal block, and a negative terminal block;

[0013] The input terminal of the secondary rectifier circuit is electrically connected to the secondary winding, and the output terminal is electrically connected to the positive terminal block and the negative terminal block respectively.

[0014] The control module is used to control the winding switching device to switch between cutting mode and manual welding mode.

[0015] Preferably, the transformer includes two primary windings, namely a first primary winding and a second primary winding, wherein the first primary winding and the second primary winding are connected in series.

[0016] The first primary winding is provided with a first connector and a second connector, and the second primary winding is provided with a third connector and a fourth connector;

[0017] The winding switching device includes a first switch and a second switch that are electrically connected to the control module respectively.

[0018] The first switch is provided with a first contact, a second contact, and a third contact; the second switch is provided with a fourth contact, a fifth contact, and a sixth contact.

[0019] The first connector is electrically connected to the output terminal of the high-frequency AC circuit, and the second connector is electrically connected to the first contact.

[0020] The third connector is electrically connected to the second contact, and the fourth connector is electrically connected to the sixth contact;

[0021] The fourth contact is electrically connected to the loop end of the high-frequency AC circuit, and the third contact is electrically connected to the fifth contact.

[0022] Preferably, the first switch and the second switch are relays or contactors.

[0023] Preferably, the control module includes an electrically connected control panel and a control unit;

[0024] The output terminal of the control unit is electrically connected to the winding switching device.

[0025] Preferably, the control module further includes an output protection circuit, the input terminal of which is electrically connected to the control unit, and the output terminal of which is electrically connected to the winding switching device.

[0026] Preferably, the secondary rectifier circuit includes a fast recovery rectifier diode module.

[0027] Preferably, the first switch and the second switch are relays capable of handling at least 50A of current.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] 1. This utility model allows cutting or manual welding to share a single secondary rectifier output circuit. By setting up a transformer with multiple series-connected primary windings, its secondary windings are electrically connected to the secondary rectifier output circuit. The control module controls the winding switching device to either cutting mode or manual welding mode, so that the transformer is electrically connected to the high-frequency AC circuit through one or more series-connected secondary windings, thereby outputting the open-circuit voltage required for cutting or manual welding. Compared with the prior art, it simplifies the winding structure of the main transformer, simplifies the secondary rectifier output circuit, has a simple overall structure, stable and reliable control, is easy to install, and has low cost.

[0030] 2. The switching between cutting mode and manual welding mode is completed through the switching command output by the control module, which is convenient and quick to operate.

[0031] 3. The terminal block is shared by both cutting and manual welding, making it convenient to use and install. Attached Figure Description

[0032] Figure 1 This is a control principle diagram of the present invention;

[0033] Figure 2 This is the circuit diagram of this utility model;

[0034] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0035] The components include: 1. High-frequency AC circuit; 2. Transformer; 3. Control module; 4. Secondary rectifier output circuit; 5. Winding switching device; 21. Secondary winding; 22. First primary winding; 23. Secondary primary winding; 31. Control panel; 32. Control unit; 33. Output protection circuit; 41. Secondary rectifier circuit; 42. Output circuit; 43. Positive terminal block; 44. Negative terminal block; 51. First switch; 52. Second switch; 411. Fast recovery rectifier diode module; 22a. First connector; 22b. Second connector; 23a. Third connector; 23b. Fourth connector; 51a. First contact; 51b. Third contact; 51c. Fourth contact; 52a. Fifth contact; 52b. Sixth contact; 52c. Detailed Implementation

[0036] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0037] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments:

[0040] like Figure 1-3 As shown, a cutting machine includes a high-frequency AC circuit 1, a transformer 2, a control module 3, and a secondary rectifier output circuit 424, characterized in that:

[0041] The transformer 2 includes a secondary winding 21 and at least two primary windings connected in series.

[0042] The primary winding is connected to the output terminal of the high-frequency AC circuit 1 via the winding switching device 5.

[0043] The winding switching device 5 is electrically connected to the control module 3, and the winding switching device 5 has a cutting mode and a manual welding mode.

[0044] In the cutting mode, transformer 2 is connected to high-frequency AC circuit 1 through one of its primary windings;

[0045] In the manual welding mode, transformer 2 is connected to high-frequency AC circuit 1 through multiple primary windings connected in series;

[0046] The secondary rectifier output circuit 424 includes a secondary rectifier circuit 41, an output circuit 42, a positive terminal block 43, and a negative terminal block 44;

[0047] The input terminal of the secondary rectifier circuit 41 is electrically connected to the secondary winding 21, and the output terminal is electrically connected to the positive terminal block 43 and the negative terminal block 44 respectively.

[0048] The control module 3 is used to control the winding switching device 5 to switch between cutting mode and manual welding mode.

[0049] In this embodiment, a single secondary rectifier output circuit 424 is used for both cutting and manual welding. A transformer 2 with multiple series-connected primary windings is used, and its secondary winding 21 is electrically connected to the secondary rectifier output circuit 424. The winding switching device 5 is controlled by the control module 3 to switch between cutting mode and manual welding mode, so that the transformer 2 is electrically connected to the high-frequency AC circuit 1 through one or more series-connected secondary windings 21, thereby outputting the open-circuit voltage required for cutting or manual welding. Compared with the prior art, the winding structure of the main transformer 2 is simplified, the secondary rectifier output circuit 424 is simplified, the overall structure is simple, the control is stable and reliable, the installation is convenient, and the cost is low.

[0050] Furthermore, such as Figure 1 , 2 As shown in Figures 1 and 3, the transformer 2 includes two primary windings, namely a first primary winding 22 and a second primary winding 23, which are connected in series.

[0051] The first primary winding 22 is provided with a first connector 22a and a second connector 22b, and the second primary winding 23 is provided with a third connector 23a and a fourth connector 23b;

[0052] The winding switching device 5 includes a first switch 51 and a second switch 52 that are electrically connected to the control module 3 respectively.

[0053] The first switch 51 is provided with a first contact 51a, a second contact 51b and a third contact 51c; the second switch 52 is provided with a fourth contact 52a, a fifth contact 52b and a sixth contact 52c;

[0054] The first connector 22a is electrically connected to the output terminal of the high-frequency AC circuit 1, and the second connector 22b is electrically connected to the first contact 51a.

[0055] The third connector 23a is electrically connected to the second contact 51b, and the fourth connector 23b is electrically connected to the sixth contact 52c;

[0056] The fourth contact 52a is electrically connected to the loop end of the high-frequency AC circuit 1, and the third contact 51c is electrically connected to the fifth contact 52b.

[0057] In this embodiment, when high-frequency AC is input to the primary winding of transformer 2, it must first pass through winding switching device 5;

[0058] Working principle: When the cutting function is selected, the external cutting gun is connected to the negative terminal 44; the control module 3 controls the winding switching device 5 to the cutting mode. At this time, the first contact 51a and the third contact 51c of the first switch 51 are connected, and the fourth contact 52a and the fifth contact 52b of the second switch 52 are connected. At this time, the first primary winding 22 of the transformer 2 is connected to the high-frequency AC circuit 1, so that the secondary winding 21 of the transformer 2 outputs about 300V AC. After being rectified by the secondary rectifier circuit 41, it is output to the negative terminal 44 through the output circuit 42, thereby meeting the voltage requirements of the cutting machine.

[0059] When manual welding is selected, the external welding clamp is connected to the negative terminal 44, and the workpiece is connected to the positive terminal 43. The control module 3 controls the winding switching device 5 to manual welding mode. At this time, the first contact 51a and the second contact 51b of the first switch 51 are connected, and the fourth contact 52a and the sixth contact 52c of the second switch 52 are connected. At this time, the first primary winding 22 and the second primary winding 23 of the transformer 2 are connected in series and then connected to the high-frequency AC circuit 1, so that the secondary winding 21 of the transformer 2 outputs about 65V AC. After being rectified by the secondary rectifier circuit 41, it is output to the positive terminal 43 and the negative terminal 44 through the output circuit 42, thereby meeting the voltage requirements of manual welding.

[0060] In the above structure, the switching between cutting mode and manual welding mode is completed by the switching command output by control module 3, which is convenient and quick to operate; in addition, cutting and manual welding share the same terminal block, which is convenient to use and install.

[0061] Furthermore, in order to meet the needs of different welding machines and expand the scope of application, the first switch 51 and the second switch 52 are relays or contactors.

[0062] Furthermore, such as Figure 1 , 2 As shown, the control module 3 includes a control panel 31 and a control unit 32 that are electrically connected.

[0063] The output terminal of the control unit 32 is electrically connected to the winding switching device 5.

[0064] In this embodiment, by touching or pressing the "cutting" or "manual welding" button on the control panel 31, an electrical signal can be sent to the control unit 32. The control unit 32 controls the winding switching device 5 to switch between cutting mode and manual welding mode according to the built-in instructions, thereby realizing the soft control switching between cutting mode and manual welding mode.

[0065] Furthermore, such as Figure 1 , 2As shown, in order to prevent device damage caused by overcurrent and improve circuit stability and reliability, the control module 3 also includes an output protection circuit 33. The input terminal of the output protection circuit 33 is electrically connected to the control unit 32, and the output terminal is electrically connected to the winding switching device 5.

[0066] Furthermore, such as Figure 2 , 3 As shown, in order to provide stable and reliable rectification of high-frequency AC, the secondary rectifier circuit 41 includes a fast recovery rectifier diode module 411.

[0067] In this embodiment, the structure and working principle of the fast recovery rectifier diode module 411 are conventional technologies in the field and will not be described in detail here.

[0068] Furthermore, such as Figure 2 , 3 As shown, in order to enhance anti-interference capabilities and enable long-term effective operation in high temperature and high humidity environments, the first switch 51 and the second switch 52 are relays capable of handling at least 50A of current.

[0069] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model patent.

Claims

1. A cutting machine, comprising a high-frequency AC circuit, a transformer, a control module, and a secondary rectifier output circuit, characterized in that: The transformer includes a secondary winding and at least two primary windings connected in series; The primary winding is connected to the output terminal of the high-frequency AC circuit via a winding switching device. The winding switching device is electrically connected to the control module, and the winding switching device has a cutting mode and a manual welding mode; In the cutting mode, the transformer is connected to a high-frequency AC circuit through one of its primary windings; In the manual welding mode, the transformer is connected to a high-frequency AC circuit through multiple primary windings connected in series. The secondary rectifier output circuit includes a secondary rectifier circuit, an output circuit, a positive terminal block, and a negative terminal block; The input terminal of the secondary rectifier circuit is electrically connected to the secondary winding, and the output terminal is electrically connected to the positive terminal block and the negative terminal block respectively. The control module is used to control the winding switching device to switch between cutting mode and manual welding mode.

2. A cutting machine according to claim 1, characterized in that, The transformer includes two primary windings, namely a first primary winding and a second primary winding, which are connected in series. The first primary winding is provided with a first connector and a second connector, and the second primary winding is provided with a third connector and a fourth connector; The winding switching device includes a first switch and a second switch that are electrically connected to the control module respectively. The first switch is provided with a first contact, a second contact, and a third contact; the second switch is provided with a fourth contact, a fifth contact, and a sixth contact. The first connector is electrically connected to the output terminal of the high-frequency AC circuit, and the second connector is electrically connected to the first contact. The third connector is electrically connected to the second contact, and the fourth connector is electrically connected to the sixth contact; The fourth contact is electrically connected to the loop end of the high-frequency AC circuit, and the third contact is electrically connected to the fifth contact.

3. A cutting machine according to claim 2, characterized in that, The first switch and the second switch are relays or contactors.

4. A cutting machine according to claim 1, characterized in that, The control module includes an electrically connected control panel and a control unit; The output terminal of the control unit is electrically connected to the winding switching device.

5. A cutting machine according to claim 4, characterized in that, The control module also includes an output protection circuit, the input of which is electrically connected to the control unit, and the output of which is electrically connected to the winding switching device.

6. A cutting machine according to claim 1, characterized in that, The secondary rectifier circuit includes a fast recovery rectifier diode module.

7. A cutting machine according to claim 3, characterized in that, The first and second switches are relays capable of handling at least 50A of current.

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