CN107186326B - Non-high frequency plasma cutting gun - Google Patents
Non-high frequency plasma cutting gun Download PDFInfo
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- CN107186326B CN107186326B CN201710516876.5A CN201710516876A CN107186326B CN 107186326 B CN107186326 B CN 107186326B CN 201710516876 A CN201710516876 A CN 201710516876A CN 107186326 B CN107186326 B CN 107186326B
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- piston rod
- piston
- electrode
- plasma cutting
- cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to the technical field of plasma cutting, in particular to a non-high-frequency plasma cutting gun, which comprises an electrode, a piston cavity and a piston rod, wherein the piston rod is movably connected in the piston cavity, the electrode is assembled at the bottom end of the piston rod, and a circle of lug boss is formed on the circumferential outer side of the bottom of the piston rod. The invention has the advantages that the bottom end of the piston rod extending out of the piston cavity has a larger diameter than similar products, has higher strength, cannot deform after being impacted by external force and heated by cutting, reduces the influence on the assembly of the electrode due to the deformation of the bottom end of the piston rod caused by mechanical damage, avoids the inconsistent size caused by accumulated error and deformation of an insulating material, and solves the problem that other products are positioned by depending on the electrode or the insulating material.
Description
Technical Field
The invention relates to the technical field of plasma cutting, in particular to a non-high-frequency plasma cutting gun.
Background
In the existing non-high frequency plasma cutting gun, because the contact section of the piston rod and the electrode needs to bear high temperature for a long time, the piston rod is easy to soften and deform.
In addition, the non-high frequency plasma cutting gun is usually installed in an integrated manner, that is, the piston rod can only enter the piston cavity from the upper part of the piston cavity and is installed downwards, so that the size of one end (namely the bottom end) of the piston rod connected with the electrode cannot exceed the size of the inside of the piston cavity, otherwise, the installation and the function of the structures of insulating materials and other parts are influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a non-high frequency plasma cutting gun which increases the mechanical strength of the head of a piston rod and reduces the practical difficulty that the original piston rod is blocked and fails due to deformation, and accessories cannot be replaced.
In order to achieve the purpose, the invention provides a non-high-frequency plasma cutting gun which comprises an electrode, a piston cavity and a piston rod, wherein the piston rod is movably connected in the piston cavity, the electrode is assembled at the bottom end of the piston rod, and a circle of boss is formed on the outer side of the bottom of the piston rod in the circumferential direction. The piston rod is used for connecting an electrode, the electrode is a plasma electrode, and the piston rod is used as an energy channel and is arranged in the center of the whole gun head. The piston cavity is a main body part of the cutting gun and is used for forming a space for the piston rod to move up and down.
Preferably, a circle of groove is formed at the bottom of the piston cavity, the groove is matched and matched with the boss, and a contact surface is formed between the concave groove and the boss. The groove is matched with the boss, so that the fit between the piston rod and the piston cavity is better, and the movement is smoother.
Preferably, a circle of tool withdrawal grooves are formed at the bottom of the piston rod.
Preferably, the height h of the boss is 1-2.5mm;
the depth d of the sinking groove is 1-2.5mm;
the outer diameter of the bottom end of the piston rod is 8-9.5mm.
Preferably, the head of the piston rod is sleeved with a piston ring. The piston ring is positioned at the head of the piston rod and used as a support of the piston rod.
Preferably, the piston ring is connected with the piston rod in an interference fit mode.
Preferably, the piston ring is in threaded connection with the piston rod.
Preferably, the head of the piston ring forms a circle of steps, and the piston ring and the baffle ring are sequentially sleeved on the steps.
Preferably, the bottom end of the piston rod is provided with a blind hole, and the blind hole is provided with an internal thread;
external threads are formed on the electrode;
the electrode is in threaded connection with the piston rod.
The invention also provides an assembly method of the non-high-frequency plasma cutting gun, which utilizes the non-high-frequency plasma cutting gun and comprises the following steps:
a, a piston rod is assembled into a piston cavity from the bottom of the piston cavity;
b, a piston ring is assembled from the top of a piston cavity, enters the piston motion cavity and is sleeved at the head of the piston rod;
c, assembling a spring into the piston cavity from the top of the piston cavity, and sleeving the spring at the head of the piston rod;
and d, mounting a piston cover on the head of the piston cavity.
The invention has the advantages that the bottom end of the piston rod extending out of the piston cavity has a larger diameter than similar products, has higher strength, cannot deform after being impacted by external force and heated by cutting, reduces the influence on large assembly of the electrode due to the deformation of the bottom end of the piston rod caused by mechanical damage, avoids the inconsistent size caused by accumulated error and deformation of an insulating material, and solves the problem that other products are positioned by depending on the electrode or the insulating material. The size of the head of the piston rod is increased to 8-9.5mm (the diameter of the thread is M5) from the original 6-7mm, so that the deformation or the thread sliding of the head of the piston rod, which is easily caused by the thin wall of the thread of the original piston rod, is avoided; the wall thickness of the end part of the piston rod is increased, so that deformation caused by mechanical damage such as falling is avoided; avoid because long-time cutting generates heat the back material and becomes soft and lead to the piston to hinder from top to bottom and burn out the rifle head. Compared with the traditional process mode of integrally mounting the piston cavity from the upper part of the piston cavity downwards, the assembling method is improved into a split assembling mode, the piston rod is assembled into the piston cavity from the bottom of the piston cavity, and the requirement of increasing the size of the end part of the piston rod connected with the electrode can be met. The integrated piston rod can only be installed from top to bottom, so that the size of the head of the piston rod cannot be too large, otherwise, the installation and the function of the structures of the insulating material and other parts are affected, the size of the head of the piston rod can be increased by a newly designed installation mode from bottom to top, and the requirement of practical use is met.
Drawings
FIG. 1 is a schematic structural view (initial state) of the present invention;
FIG. 2 is a schematic view of the structure of the present invention (venting state);
FIG. 3 is a schematic view showing the connection state of the piston rod and the piston ring according to the present invention.
Wherein:
1-electrode nozzle 2-electrode 3-vortex ring
4-outer nozzle protective sleeve 5-piston cavity 51-sink
6-piston rod 51-sink 61-boss
7-piston ring 8-spring 9-piston cover
10-trachea
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
Example 1:
as shown in fig. 1, the non-high frequency plasma cutting gun comprises an electrode 2, a piston cavity 5 and a piston rod 6, wherein the piston rod 6 is movably connected in the piston cavity 5, the electrode 2 is assembled at the bottom end of the piston rod 6, and a circle of boss 61 is formed on the circumferential outer side of the bottom of the piston rod 6.
The bottom of the piston cavity 5 is formed with a circle of groove 51, the groove 51 is matched and matched with the boss 61, and a contact surface 100 is formed between the groove 51 and the boss 61.
A circle of tool withdrawal grooves are formed at the bottom of the piston rod 6.
The height h of the boss 11 is 1-2.5mm;
the depth d of the sinking groove 51 is 1-2.5mm;
the outer diameter of the bottom end of the piston rod 6 is 8-9.5mm.
The head of the piston rod 6 is sleeved with a piston ring 7.
The piston ring 7 is connected with the piston rod 6 in an interference fit manner.
A blind hole is formed at the bottom end of the piston rod 6 and is provided with an internal thread;
an external thread is formed on the electrode 2;
the electrode 2 is in threaded connection with the piston rod 6.
Fig. 1 shows an initial state of the non-hf plasma cutting torch in use, with the piston rod 6 in a home position, in which the electrode 2 and the electrode nozzle 1 are in contact;
FIG. 2 shows that the piston ring 7 on the piston rod 6 is subjected to gas pressure from the gas pipe 10, pressure is generated on the piston ring 7, the piston ring 7 drives the piston rod 6 and the electrode 2 to move upwards against the pressure of the spring 8, so that an air gap is generated between the electrode and the electrode nozzle to form a plasma arc, the generated plasma arc is blown out of the electrode nozzle through continuous input of compressed gas, and finally a cutting arc is formed
The assembling method of the non-high-frequency plasma cutting gun comprises the following steps:
step a, a piston rod 6 is assembled into a piston cavity 5 from the bottom of the piston cavity 5;
b, a piston ring 7 is assembled into the piston cavity 5 from the top of the piston cavity 5 and sleeved on the head of the piston rod 6;
c, a spring 8 is assembled from the top of the piston cavity 5 into the piston cavity 5 and sleeved at the head of the piston rod 6;
and d, installing a piston cover 9 at the head part of the piston cavity 5.
Example 2:
the rest of the embodiment is the same as the embodiment 1, and a non-high frequency plasma cutting gun, wherein the piston ring 7 is in threaded connection with the piston rod 6.
Example 3:
in the rest of the same manner as in embodiment 1, a non-hf plasma cutting torch, the piston rod 6 has a head portion formed with a ring of steps, and a piston ring 7 and a retainer ring are sequentially fitted over the steps.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of numerous equivalents and substitutions, all of which are within the scope of the invention as defined by the appended claims.
Claims (7)
1. A non-high frequency plasma cutting gun comprises an electrode (2), a piston cavity (5) and a piston rod (6), wherein the piston rod (6) is movably connected in the piston cavity (5), the electrode (2) is assembled at the bottom end of the piston rod (6), and the non-high frequency plasma cutting gun is characterized in that a circle of boss (61) is formed on the circumferential outer side of the bottom of the piston rod (6);
a circle of groove (51) is formed at the bottom of the piston cavity (5), the groove (51) is matched and matched with the boss (61), and a contact surface (100) is formed between the groove (51) and the boss (61);
the height h of the boss (61) is 1-2.5mm;
the depth d of the groove (51) is 1-2.5mm;
the outer diameter of the bottom end of the piston rod (6) is 8-9.5mm;
the head of the piston rod (6) is sleeved with a piston ring (7).
2. Non-hf plasma cutting gun according to claim 1, characterized in that a ring of relief grooves is formed at the bottom of the piston rod (6).
3. Non-hf plasma cutting gun according to claim 1, characterized in that the piston ring (7) is connected with the piston rod (6) by interference fit.
4. Non-hf plasma cutting gun according to claim 1, characterized in that the piston ring (7) is screwed to the piston rod (6).
5. The non-high frequency plasma cutting gun according to claim 1, characterized in that the head of the piston rod (6) forms a circle of steps, and the piston ring (7) and the baffle ring are sleeved on the steps in sequence.
6. Non-hf plasma cutting gun according to claim 1, characterized in that the bottom end of the piston rod (6) is formed with a blind hole with an internal thread;
an external thread is formed on the electrode (2);
the electrode (2) is in threaded connection with the piston rod (6).
7. A method of assembling a non-hf plasma cutting gun, using a cutting gun according to any one of claims 1 to 6, including the steps of:
step a, a piston rod (6) is assembled into a piston cavity (5) from the bottom of the piston cavity (5);
b, a piston ring (7) is assembled into the piston cavity (5) from the top of the piston cavity (5) and sleeved on the head of the piston rod (6);
c, a spring (8) is assembled from the top of the piston cavity (5) into the piston cavity (5) and sleeved at the head of the piston rod (6);
d, installing a piston cover (9) at the head of the piston cavity (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516876.5A CN107186326B (en) | 2017-06-29 | 2017-06-29 | Non-high frequency plasma cutting gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710516876.5A CN107186326B (en) | 2017-06-29 | 2017-06-29 | Non-high frequency plasma cutting gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107186326A CN107186326A (en) | 2017-09-22 |
| CN107186326B true CN107186326B (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710516876.5A Active CN107186326B (en) | 2017-06-29 | 2017-06-29 | Non-high frequency plasma cutting gun |
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| CN (1) | CN107186326B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109773314B (en) * | 2019-02-22 | 2023-10-31 | 上海亿诺焊接科技股份有限公司 | Plasma contact arc striking cutting gun head |
| CN115156674A (en) * | 2022-07-15 | 2022-10-11 | 浙江奥利达气动工具股份有限公司 | Plasma cutting gun |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529999A (en) * | 2006-02-17 | 2009-09-09 | 海别得公司 | Electrode for a contact start plasma arc torch and contact start plasma arc torch employing such electrodes |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6969819B1 (en) * | 2004-05-18 | 2005-11-29 | The Esab Group, Inc. | Plasma arc torch |
| CN201674721U (en) * | 2010-06-09 | 2010-12-15 | 济南尼克焊接技术有限公司 | Plasma cutting tool with pneumatic structure |
| CN203621717U (en) * | 2013-10-22 | 2014-06-04 | 台州世通焊接设备有限公司 | Cutting torch of direct-current arc-striking air plasma cutter |
| US9908195B2 (en) * | 2014-05-30 | 2018-03-06 | Hypertherm, Inc. | Plasma cutting system with efficient components |
| CN203875469U (en) * | 2014-06-04 | 2014-10-15 | 常州市金球焊割设备有限公司 | Low-frequency plasma cutting gun |
| CN204867761U (en) * | 2015-07-07 | 2015-12-16 | 上海亿诺科技有限公司 | Ion cutting torch head |
| CN207710066U (en) * | 2017-06-29 | 2018-08-10 | 上海亿诺焊接科技股份有限公司 | A kind of non-high frequency plasma cutting gun |
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2017
- 2017-06-29 CN CN201710516876.5A patent/CN107186326B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101529999A (en) * | 2006-02-17 | 2009-09-09 | 海别得公司 | Electrode for a contact start plasma arc torch and contact start plasma arc torch employing such electrodes |
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| Publication number | Publication date |
|---|---|
| CN107186326A (en) | 2017-09-22 |
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