CN214921313U - Plasma cutting torch for non-contact cutting without arc striking wire - Google Patents
Plasma cutting torch for non-contact cutting without arc striking wire Download PDFInfo
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- CN214921313U CN214921313U CN202120745258.XU CN202120745258U CN214921313U CN 214921313 U CN214921313 U CN 214921313U CN 202120745258 U CN202120745258 U CN 202120745258U CN 214921313 U CN214921313 U CN 214921313U
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Abstract
The utility model discloses a plasma cutting torch for non-contact cutting without arc lead, which comprises a cutting torch body, an outer nozzle, an electrode, an insulating ring, an electrode nozzle and a bracket; the center of the cutting torch body is provided with a hole, and the electrode is fixedly connected to the bottom of the hole; the outer nozzle is fixedly sleeved outside the cutting torch body, the bottom end of the outer nozzle is bent towards the inner side to form a second step surface, and the second step surface supports the electrode nozzle, so that the electrode nozzle and the insulating ring are tightly abutted together to fix the electrode nozzle and the insulating ring; the support is clamped at the outer side of the outer nozzle through the elasticity of the support, a third step surface is processed on the outer surface of the outer nozzle, and the position of the support is limited by the third step surface, so that the linear distance between the bottom surface of the electrode nozzle and the support is 0.2mm-1mm after the support is fixed on the outer nozzle; the purpose is to realize non-contact cutting under the condition that the cutting torch does not have an arc, improve the service life of the nozzle and reduce the resource waste.
Description
Technical Field
The utility model relates to an ion cutting technical field, more specifically, the utility model relates to a plasma cutting torch of non-contact cutting of no striking arc line.
Background
The cutting method of the hand-held plasma torch can be divided into a contact cutting type and a non-contact cutting type according to the cutting method. The torch for contact cutting has no lead line. It features that the nozzle is contacted with workpiece (connected to positive pole of power supply). The current passes through the electrode (connected with the negative pole of the power supply through the cutting torch), breaks through the gap between the electrode and the nozzle, and is transmitted to the workpiece through the nozzle to form a cutting loop. The non-contact cutting torch has arc leading line, and features that the nozzle is not contacted with workpiece, the current passes through the electrode and breaks through the gap between the electrode and the nozzle to form a loop, and the plasma arc with small current is jetted from the nozzle to the workpiece. When the plasma arc with small current is sprayed to the workpiece, the power supply outputs actual cutting current to form a cutting loop.
Because the nozzle contacts with the workpiece during contact cutting, the temperature of the workpiece is higher during melting, and the heat on the workpiece can be transferred to the nozzle, so that the temperature of the nozzle rises faster, and the loss of the nozzle is accelerated. In addition, the temperature on the workpiece can be transferred through the nozzle to the torch increasing the risk of torch damage. The non-contact cutting nozzle is not in contact with the workpiece, but an arc leading line is required to be added on the cutting torch, the arc leading line is generally 1.5 square millimeters, the length of the copper wire is generally more than 4 meters, and the cost of the plasma cutting torch is increased compared with the non-contact cutting. In addition, because the cutting torch nozzle of non-contact cutting needs to be connected through the positive pole on outer nozzle and the rifle head, the outer nozzle of non-contact cutting torch is mostly insulating material and copper product and makes, and the outer nozzle of contact cutting is mostly ceramic. This in turn increases the cost of the non-contact cutting torch. In addition, since the non-contact cutting torch has a positive electrode and a negative electrode, the positive electrode and the negative electrode need to be insulated by an insulating material. Generally, the plasma cutting torch for contact cutting is relatively simple and low in cost, but the nozzle is easy to damage, the cutting capability is limited, and the plasma cutting torch for non-contact cutting is relatively complex and high in cost, but the nozzle is not easy to damage, and the cutting capability is relatively strong. The non-contact cutting torch in the prior art can not realize non-contact cutting without an arc striking wire, the cutting capability of contact cutting is limited, and the service life of the nozzle of the contact cutting is about 50 percent of that of the nozzle of the non-contact cutting.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a plasma cutting torch of no striking arc line non-contact cutting, the purpose is that realize the non-contact cutting under the condition that the cutting torch does not take the striking arc line, improves nozzle life, reduces the wasting of resources.
The technical scheme of the utility model is that: a plasma cutting torch for non-contact cutting without arc striking wires comprises a cutting torch body, an outer nozzle, an electrode, an insulating ring, an electrode nozzle and a bracket;
the center of the cutting torch body is provided with a hole, and the electrode is fixedly connected to the bottom of the hole;
the insulating ring consists of a large-diameter circular ring, a small-diameter circular ring and a first step surface, and the first step surface is connected with the bottom surface of the large-diameter circular ring and the top surface of the small-diameter circular ring;
the large-diameter ring is sleeved at the bottom of the cutting torch body, the small-diameter ring is inserted into the inner side of the top of the electrode nozzle, and the position of the electrode nozzle is limited by the first step surface;
the outer nozzle is fixedly sleeved outside the cutting torch body, the bottom end of the outer nozzle is bent towards the inner side to form a second step surface, and the second step surface supports the electrode nozzle, so that the electrode nozzle and the insulating ring are tightly abutted together to fix the electrode nozzle and the insulating ring;
the support is clamped on the outer side of the outer nozzle through the elasticity of the support, a third step surface is processed on the outer surface of the outer nozzle, and the position of the support is limited by the third step surface, so that after the support is fixed on the outer nozzle, the linear distance between the bottom surface of the electrode nozzle and the support is 0.2mm-1 mm.
The cutting torch further comprises a flow guide pipe, wherein the flow guide pipe is a hollow metal pipe, the top of the flow guide pipe is fixed in a central hole of the cutting torch body in an interference fit mode, and the bottom of the flow guide pipe is inserted into the electrode. The gas flows through the guide pipe from the plasma cutting torch, and the guide pipe guides the gas to blow to the bottom of the electrode for cooling the electrode.
Furthermore, a first internal thread is arranged at the bottom of a central hole of the cutting torch body; the electrode is characterized in that a first external thread is arranged on the top of the electrode, and the electrode is connected and fixed on the cutting torch body through the first external thread and a first internal thread at the bottom of the hole in a matching manner.
Furthermore, a second external thread is arranged on the outer surface of the cutting torch body, a second internal thread is arranged on the inner surface of the external nozzle, and the external nozzle is connected and fixed on the cutting torch body through the second external thread and the second internal thread in a matched manner.
Furthermore, a sealing ring is arranged at the joint of the outer nozzle and the cutting torch body.
The utility model has the advantages that:
and the plasma cutting torch cable set is free of arc leading lines, and a nozzle does not contact with a workpiece in the cutting process of the plasma.
After the cutting support and the nozzle are installed, when the support is tightly attached to a workpiece, the distance between the electrode nozzle and the workpiece is 0.2mm-1mm, and the cutting voltage can be punctured through the distance. By setting the proper distance from the nozzle to the workpiece, the cutting voltage breaks through the distance, and non-contact cutting without arc striking wires is realized.
Drawings
Fig. 1 is a general non-contact cutting type plasma cutting torch.
In the figure: 101 is an arc striking wire, 102 is an outer nozzle, 103 is an inner liner, 104 is a cutting support, 105 is an insulating ring, 106 is an electrode, and 107 is a nozzle.
Fig. 2 is a general contact cutting type plasma cutting torch.
In the figure: reference numeral 201 denotes an outer nozzle, 202 denotes an electrode, 203 denotes an insulating ring, and 204 denotes a nozzle.
Fig. 3 is a plasma cutting torch for non-arc-leading non-contact cutting according to the present application.
Fig. 4 is an exploded view of a plasma torch for non-contact cutting without a pilot arc according to the present application.
Fig. 5 is a schematic structural diagram of the insulating ring of the present application.
Fig. 6 is a schematic structural diagram of the insulating ring of the present application.
In the figure: 301 is an outer nozzle, 302 is an electrode, 303 is a flow guide tube, 304 is an insulating ring, 305 is an electrode nozzle, 306 is a support, 307 is a sealing ring, and 308 is a torch body.
Detailed Description
The plasma cutting torch for non-contact cutting without striking wires of the present invention will be further described in detail with reference to the accompanying drawings.
Comparative examples
As shown in fig. 1, a non-contact cutting plasma torch is generally used, which has an arc-guiding line 101, and an outer nozzle 102 has an inner liner 103 made of metal for connecting a nozzle 107 and the arc-guiding line. The torch is provided with a cutting support 104, and the nozzle 107 is not in contact with the workpiece. When cutting, the current flows from the cathode of the cutting torch to the nozzle 107, then breaks through the gap between the nozzle 107 and the electrode 106 to the nozzle 107, then flows to the copper lining 103 of the outer nozzle through the nozzle, and flows to the anode of the arc leading line of the torch head to form a guiding arc, and when the guiding arc touches a workpiece, the guiding arc is converted into a cutting arc to realize normal non-contact cutting. The outer nozzle 102, the copper lining 103 and the lance head are relatively complex, the manufacturing cost is high, and resources are wasted.
As shown in fig. 2, a contact type plasma cutting torch is generally used, and there is no arc line on the torch, and the nozzle 204 is closely attached to the workpiece when cutting. The current flows from the cathode of the torch to the electrode 202, breaks through the gap between the electrode 202 and the nozzle 204 to the nozzle, and then to the workpiece to achieve cutting. Because the nozzle 204 is in close proximity to the workpiece, heat from the workpiece is conducted to the nozzle 204 and torch during cutting, which reduces the life and performance of the nozzle 204 and torch. The nozzle 204 for contact cutting is about 50% of that for non-contact cutting. The contact type plasma cutting nozzle 204 is damaged fast and lacks economical efficiency.
Example 1
As shown in fig. 3, the plasma cutting torch for non-contact cutting without arc-leading line of the utility model comprises a plasma cutting torch body 308,
the plasma cutting torch is provided with an outer nozzle 301, an electrode 302, a flow guide pipe 303, an insulating ring 304, an electrode nozzle 305 and a bracket 306.
The flow guide pipe 303 is a metal pipe with the diameter of 4mm, and is in interference fit with a hole formed in the center of the plasma cutting torch. The gas flows through the guide pipe from the plasma cutting torch, and the guide pipe guides the gas to blow to the bottom of the electrode for cooling the electrode.
The plasma cutting electrode 302 is attached to the plasma cutting torch by an upper thread.
The insulating ring is made of a high-molecular insulating material, has good processing performance, and can ensure that the processing size is precisely matched with the electrode nozzle 5 and the plasma cutting torch.
The insulating ring 304 is a stepped ring, and is composed of a large-diameter ring 3041, a small-diameter ring 3042, and a first step surface 3043, where the first step surface 3043 connects the bottom surface of the large-diameter ring 3041 and the top surface of the small-diameter ring 3042. The large diameter ring 3041 fits around the bottom of the torch body 308, and the small diameter ring 3042 is inserted inside the top of the electrode nozzle 305, and the position of the electrode nozzle 305 is defined by the first step surface 3043.
The outer nozzle 301 is provided with an internal thread which is connected with an external thread on the plasma cutting torch, and a sealing ring 307 is arranged at the joint. The bottom end of the outer nozzle 301 is bent inward to form a second step surface that holds the electrode nozzle 305 such that the electrode nozzle 305 and the insulating ring 304 are closely fitted together, and holds the electrode nozzle 305 and the insulating ring 304.
The support 306 on the plasma cutting torch is elastically clamped on the outer nozzle 301, and a third step surface is machined on the outer surface of the outer nozzle 301 and limits the position of the support 306.
After the cutting support and the nozzle are installed, when the support is tightly attached to a workpiece, a certain distance exists between the electrode nozzle and the workpiece, and the distance can enable cutting voltage to break down. The distance is between 0.2mm and 1 mm.
The plasma cutting torch is used for realizing non-contact cutting under the condition of no arc striking wire by setting a proper distance between a nozzle and a workpiece to ensure that cutting voltage breaks through the distance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A plasma cutting torch for non-contact cutting without arc striking wires is characterized in that: comprises a cutting torch body (308), an outer nozzle (301), an electrode (302), an insulating ring (304), an electrode nozzle (305) and a bracket (306);
the cutting torch body (308) is provided with a central hole, and the electrode (302) is fixedly connected to the bottom of the hole;
the insulating ring (304) consists of a large-diameter circular ring (3041), a small-diameter circular ring (3042) and a first step surface (3043), wherein the first step surface (3043) is connected with the bottom surface of the large-diameter circular ring (3041) and the top surface of the small-diameter circular ring (3042);
the large-diameter circular ring (3041) is sleeved at the bottom of the cutting torch body (308), the small-diameter circular ring (3042) is inserted into the inner side of the top of the electrode nozzle (305), and the position of the electrode nozzle (305) is limited by a first step surface (3043);
the outer nozzle (301) is fixedly sleeved outside the cutting torch body (308), the bottom end of the outer nozzle (301) is bent towards the inner side to form a second step surface, the second step surface supports the electrode nozzle (305), so that the electrode nozzle (305) and the insulating ring (304) are tightly abutted together, and the electrode nozzle (305) and the insulating ring (304) are fixed;
the support (306) is clamped at the outer side of the outer nozzle (301) through the elasticity of the support, a third step surface is processed on the outer surface of the outer nozzle (301), and the third step surface limits the position of the support (306), so that after the support (306) is fixed on the outer nozzle (301), the linear distance between the bottom surface of the electrode nozzle (305) and the support (306) is 0.2mm-1 mm.
2. A plasma cutting torch for non-contact cutting without ignition wire as defined in claim 1, wherein: the cutting torch is characterized by further comprising a guide pipe (303), wherein the guide pipe (303) is a hollow metal pipe, the top of the guide pipe (303) is fixed in a central hole of the cutting torch body (308) in an interference fit mode, and the bottom of the guide pipe (303) is inserted into the electrode (302).
3. A plasma cutting torch for non-contact cutting without ignition wire as defined in claim 1, wherein: a first internal thread is arranged at the bottom of a central hole of the cutting torch body (308); the top of the electrode (302) is provided with a first external thread, and the electrode (302) is matched and connected with the first internal thread at the bottom of the hole through the first external thread and is fixed on the cutting torch body (308).
4. A plasma cutting torch for non-contact cutting without ignition wire as defined in claim 1, wherein: the outer surface of the cutting torch body (308) is provided with a second external thread, the inner surface of the external nozzle (301) is provided with a second internal thread, and the external nozzle (301) is matched and connected with the second internal thread through the second external thread and is fixed on the cutting torch body (308).
5. A plasma cutting torch for non-contact cutting without ignition wire as defined in claim 1, wherein: and a sealing ring (307) is arranged at the joint of the outer nozzle (301) and the cutting torch body (308).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120745258.XU CN214921313U (en) | 2021-04-13 | 2021-04-13 | Plasma cutting torch for non-contact cutting without arc striking wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120745258.XU CN214921313U (en) | 2021-04-13 | 2021-04-13 | Plasma cutting torch for non-contact cutting without arc striking wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214921313U true CN214921313U (en) | 2021-11-30 |
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ID=79045283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120745258.XU Active CN214921313U (en) | 2021-04-13 | 2021-04-13 | Plasma cutting torch for non-contact cutting without arc striking wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214921313U (en) |
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2021
- 2021-04-13 CN CN202120745258.XU patent/CN214921313U/en active Active
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