CN103394798A - Brazing type plasma electrode and manufacturing method thereof - Google Patents
Brazing type plasma electrode and manufacturing method thereof Download PDFInfo
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- CN103394798A CN103394798A CN2013103262001A CN201310326200A CN103394798A CN 103394798 A CN103394798 A CN 103394798A CN 2013103262001 A CN2013103262001 A CN 2013103262001A CN 201310326200 A CN201310326200 A CN 201310326200A CN 103394798 A CN103394798 A CN 103394798A
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Abstract
The invention relates to a brazing type plasma electrode and a manufacturing method of the brazing type plasma electrode. The manufacturing method of the brazing type plasma electrode includes the steps that strengthened oxygen-free copper serves an electrode body, and a brazing hole and a cooling hole are machined in the electrode body; a hafnium filament is turned or cut to obtain hafnium particles; a brazing material is machined; the electrode body is placed in a horizontal clamp, the brazing material is firstly placed in the brazing hole, and then the hafnium particles are placed in the brazing hole; an assembled product is placed in a vacuum furnace, the vacuum furnace is pumped to be vacuum and is heated to be at a brazing temperature, the brazing material is melted so that the hafnium particles and the electrode body can be connected into a whole, and the operations of heat insulation and cooling are carried out. The manufacturing method of the brazing type plasma electrode can solve the problem that a brazing type electrode in the prior art can not be processed and used in the subsequent processes due to product material softening caused by an annealing phenomenon existing in a brazing high-temperature process. The strengthened oxygen-free copper in the technical scheme has good conductive performance and high temperature resistance softening performance, can meet the requirement of conduction of the electrode, and can also avoids the problem of softening caused by the material problem in the brazing process.
Description
Technical field
The present invention relates to the plasma electrode technical field, be specifically related to a kind of braze welding type plasma cutting electrode and manufacture method thereof.
Background technology
Now plasma cutting electrode is mainly adopted and is completed in two ways being connected between electrode body and hafnium particle, i.e. interference press-fit and braze welding type on the market.During the interference press-fit connected, the size of the magnitude of interference was of crucial importance, and the magnitude of interference is too large, and material can not bear, and there will be cracking; The magnitude of interference is too little, makes caloric value large, can not good contact cause resistance excessive, and function can't realize.And the size of the magnitude of interference is difficult for controlling, and magnitude of interference size does not have perfect standard to calculate yet.Braze welding type plasma cutting process technology is with regard to the effect aspect near laser cutting, but cost makes the braze welding type plasma cutting technique in each enterprise, obtain abundant development well below laser cutting.And braze welding type plasma cutting electrode great majority adopt oxygen-free copper TUI at present, in the brazing temperature situation, can produce tempering, directly cause the material deliquescing, follow-up can't processing and use.
Summary of the invention
The invention provides a kind of braze welding type plasma electrode and manufacture method thereof, the method can solve the braze welding type electrode and the problem that fiery phenomenon causes the product deliquescing in the soldering pyroprocess, occur taking off.
The scheme that solves the problems of the technologies described above is as follows:
Step (1), using and strengthen oxygen-free copper as electrode body, on electrode body, processes soldering hole and Cooling Holes;
Step (2), process hafnium filament to obtain the hafnium particle by turning or cut-out;
Step (3), adopt to cut off to process to process brazing material;
Step (4), be placed on electrode body in the fixture of level, in the soldering hole on electrode body, first puts into the brazing material that step (3) obtains, then put into the hafnium particle;
Step (5), put into vacuum drying oven by the product that step (4) assembles, and vacuumizes, and is heated to brazing temperature, and solder melts connects as one hafnium particle and electrode body, then be incubated and cooling.
Further, in described step (2), the processing of hafnium particle, differ 0.02-0.3mm according to various outer diameter and the soldering aperture of hafnium particle, preferred 0.07mm.Because the soldering of this temperature is leaned on, be the capillarity after silver melts, aperture is too little not to be flow out, and between too large hafnium particle and hole, just can not form capillarity, causes filling out and is discontented with and rosin joint.Solder flows in this scope, weld seam can be filled to the complete rosin joint that not there will be, and crosses weldering.
Further, brazing material processing in described step (3), according to the length of hafnium particle, the difference in aperture, calculate the volume that needs solder and convert to scolder length according to volume, the brazing material diameter is less than the soldering bore dia, and diameter differs 0.2-0.8mm and gets final product.In the calculating of brazing material, need to consider following some: 1, need to consider the limiting volume difference of hafnium particle and copper body opening.2, need consider the cross flow quantity after the fusing of silver solder at a certain temperature.3, need to consider the loss of silver solder under high temperature and vacuum state.4, need to consider in the appearance of weld process that silver solder is respectively at the corrosion volume of copper body and hafnium particle.Too much with very few, all can affect properties of product.The solder volume can calculate in accordance with the following methods:
The volume of bottom cone after solder volume=(electrode body area-hafnium filament area) * welding wire hole depth+boring
Further, in described step (5), vacuum requires 1x10
-2– 8x10
-3Pa.
Further, in described step (5), brazing temperature is controlled between 700-880 ℃ according to the requirement of brazing material, and temperature retention time is 30-45 minute.
Adopted such scheme, solved the braze welding type electrode and in the soldering pyroprocess, occurred that tempering phenomenon causes the problem of product deliquescing, adopt novel copper material to strengthen oxygen-free copper, this copper material is in oxygen-free copper, to add metal oxide (content 0.2%-0.8%), again the novel reinforced oxygen-free copper that obtains of melting, described metal oxide is Al
2O
3, CuO and Fe
2O
3In any one.This reinforcement oxygen-free copper has good electric conductivity and high temperature resistance softening performance, both can meet the electrodes conduct demand, the softening problem that can avoid again in brazing process the problem due to material itself to cause.
A kind of braze welding type plasma electrode, comprise copper electrode main body, hafnium particle, and described copper electrode main body is for strengthening oxygen-free copper, and the electrode body head has the soldering hole, and brazing material is welded in the hafnium particle in the soldering hole, makes it with electrode body, be connected.
Described reinforcement oxygen-free copper is in oxygen-free copper, to add metal oxide (content 0.2%-0.8%), and melting obtains again, and described metal oxide is Al
2O
3, CuO and Fe
2O
3In any one.
Adopted such scheme, this braze welding type plasma electric has good electric conductivity and high temperature resistance softening performance, both can meet the electrodes conduct demand, the softening problem that can avoid again in brazing process the problem due to material itself to cause.
The accompanying drawing explanation
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of braze welding type plasma electrode of the present invention;
In figure: 1 is the copper electrode main body, and 2 is the hafnium particle.
The specific embodiment
1, using and strengthen oxygen-free copper as electrode body, on electrode body, process soldering hole, Cooling Holes; Hafnium filament is processed and obtained the hafnium particle by turning; According to various outer diameter and the soldering aperture of hafnium particle, differ 0.07mm; Adopt to cut off to process and process brazing material; According to the length of hafnium particle, the difference in aperture, calculate the volume that needs solder and convert to scolder length according to volume, and the brazing material diameter is less than the soldering bore dia, and diameter differs 0.2mm; Electrode body is placed in the fixture of level, in the soldering hole on electrode body, first puts into brazing material, then put into the hafnium particle; The product that assembles is put into to vacuum drying oven, vacuumize, vacuum is 1x10
-2Pa, be heated to 880 ℃, after solder is melted up to liquid solder and automatically fills up gap, solidifies, and hafnium particle and electrode body are connected as one, and temperature retention time is 30 minutes, comes out of the stove.
2, using and strengthen oxygen-free copper as electrode body, on electrode body, process soldering hole and Cooling Holes; Hafnium filament is processed and obtained the hafnium particle by cut-out; According to various outer diameter and the soldering aperture of hafnium particle, differ 0.08mm; Adopt to cut off to process and process brazing material; According to the length of hafnium particle, the difference in aperture, calculate the volume that needs solder and convert to scolder length according to volume, and the brazing material diameter is less than the soldering bore dia, and diameter differs 0.8mm; Electrode body is placed in the fixture of level, in the soldering hole on electrode body, first puts into brazing material, then put into the hafnium particle; The product that assembles is put into to vacuum drying oven, vacuumize, vacuum is 8x10
-3Pa, be heated to 700 ℃, after solder is melted up to liquid solder and automatically fills up gap, solidifies, and hafnium particle and electrode body are connected as one, and temperature retention time is 45 minutes, comes out of the stove.
3, using and strengthen oxygen-free copper as electrode body, on electrode body, process soldering hole and Cooling Holes; Hafnium filament is processed and obtained the hafnium particle by turning; According to various outer diameter and the soldering aperture of hafnium particle, differ 0.1mm; Adopt to cut off to process and process brazing material; According to the length of hafnium particle, the difference in aperture, calculate the volume that needs solder and convert to scolder length according to volume, and the brazing material diameter is less than the soldering bore dia, and diameter differs 0.6mm; Electrode body is placed in the fixture of level, in the soldering hole on electrode body, first puts into brazing material, then put into the hafnium particle; The product that assembles is put into to vacuum drying oven, vacuumize, vacuum is 9x10
-3Pa, be heated to 830 ℃, after solder is melted up to liquid solder and automatically fills up gap, solidifies, and hafnium particle and electrode body are connected as one, and temperature retention time is 35 minutes, comes out of the stove.
Claims (9)
1. a braze welding type plasma electrode and manufacture method thereof comprise the following steps:
Step (1), using and strengthen oxygen-free copper as electrode body, on electrode body, processes soldering hole and Cooling Holes;
Step (2), process hafnium filament to obtain the hafnium particle by turning or cut-out;
Step (3), adopt to cut off to process to process brazing material;
Step (4), be placed on electrode body in the fixture of level, in the soldering hole on electrode body, first puts into the brazing material that step (3) obtains, then put into the hafnium particle;
Step (5), put into vacuum drying oven by the product that step (4) assembles, and vacuumizes, and is heated to brazing temperature, and solder melts connects as one hafnium particle and electrode body, then be incubated and cooling.
2. according to the described a kind of braze welding type plasma electrode of claims 1 and manufacture method thereof, the external diameter of described hafnium particle and soldering hole internal diameter differ 0.02-0.3mm.
3. according to the described a kind of braze welding type plasma electrode of claims 1 and manufacture method thereof, brazing material processing in described step (3), length according to the hafnium particle, the difference in aperture, calculate the volume that needs solder and convert to scolder length according to volume, the brazing material diameter is less than the soldering bore dia, and diameter differs 0.2-0.8mm.
4. according to the described a kind of braze welding type plasma electrode of claims 3 and manufacture method thereof, it is characterized in that: the calculation method of physical volume of described solder is as follows:
The volume of bottom cone after solder volume=(electrode body area-hafnium filament area) * welding wire hole depth+boring.
5. according to the described a kind of braze welding type plasma electrode of claims 1 and manufacture method thereof, it is characterized in that: described reinforcement oxygen-free copper is in oxygen-free copper, to add metal oxide (content 0.2%-0.8%), and melting obtains again.
6. according to the described a kind of braze welding type plasma electrode of claims 1 and manufacture method thereof, in described step (5), vacuum requires 1x10
-2– 8x10
-3Pa.
7. according to the described a kind of braze welding type plasma electrode of claims 1 and manufacture method thereof, in described step (5), brazing temperature is controlled between 700-880 ℃ according to the requirement of brazing material, and temperature retention time is 30-45 minute.
8. braze welding type plasma electrode, comprise copper electrode main body (1), hafnium particle (2), it is characterized in that: described copper electrode main body is for strengthening oxygen-free copper, and the electrode body head has the soldering hole, brazing material is welded in the hafnium particle in the soldering hole, makes it with electrode body, be connected.
9. plasma electrode according to claim 8, it is characterized in that: described reinforcement oxygen-free copper is in oxygen-free copper, to add metal oxide (content 0.2%-0.8%), and melting obtains again.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722902A (en) * | 2015-03-31 | 2015-06-24 | 常州特尔玛枪嘴有限公司 | Novel brazing type plasma electrode and manufacturing method thereof |
| CN105252160A (en) * | 2015-11-06 | 2016-01-20 | 常州特尔玛枪嘴有限公司 | Plasma electrode and manufacturing method thereof |
| CN108723533A (en) * | 2017-10-26 | 2018-11-02 | 南京佑天金属科技有限公司 | A kind of ultrasonic wave assisted plasma cutting electrode vacuum soldering method |
| CN111001891A (en) * | 2019-10-30 | 2020-04-14 | 合肥科聚低温技术有限公司 | Heat exchanger and room temperature copper head welding tool and welding process |
| CN114871781A (en) * | 2022-05-18 | 2022-08-09 | 淮南市泰能电力工程有限公司 | Pressurized water reactor device with nickel-based alloy ultrasonic argon arc welding seam |
| CN115647733A (en) * | 2022-10-11 | 2023-01-31 | 中国核动力研究设计院 | Hafnium standard substance and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104722902A (en) * | 2015-03-31 | 2015-06-24 | 常州特尔玛枪嘴有限公司 | Novel brazing type plasma electrode and manufacturing method thereof |
| CN105252160A (en) * | 2015-11-06 | 2016-01-20 | 常州特尔玛枪嘴有限公司 | Plasma electrode and manufacturing method thereof |
| CN105252160B (en) * | 2015-11-06 | 2017-08-25 | 常州特尔玛枪嘴有限公司 | A kind of plasma electrode and its manufacture method |
| CN108723533A (en) * | 2017-10-26 | 2018-11-02 | 南京佑天金属科技有限公司 | A kind of ultrasonic wave assisted plasma cutting electrode vacuum soldering method |
| CN111001891A (en) * | 2019-10-30 | 2020-04-14 | 合肥科聚低温技术有限公司 | Heat exchanger and room temperature copper head welding tool and welding process |
| CN114871781A (en) * | 2022-05-18 | 2022-08-09 | 淮南市泰能电力工程有限公司 | Pressurized water reactor device with nickel-based alloy ultrasonic argon arc welding seam |
| CN114871781B (en) * | 2022-05-18 | 2024-02-27 | 淮南市泰能电力工程有限公司 | Pressurized water reactor device with nickel-based alloy ultrasonic argon arc welding seam |
| CN115647733A (en) * | 2022-10-11 | 2023-01-31 | 中国核动力研究设计院 | Hafnium standard substance and preparation method thereof |
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Application publication date: 20131120 |