CN103878457A - Graphite electrode and method for steel pipe inner diameter machining with graphite electrode - Google Patents
Graphite electrode and method for steel pipe inner diameter machining with graphite electrode Download PDFInfo
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- CN103878457A CN103878457A CN201410101643.5A CN201410101643A CN103878457A CN 103878457 A CN103878457 A CN 103878457A CN 201410101643 A CN201410101643 A CN 201410101643A CN 103878457 A CN103878457 A CN 103878457A
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Abstract
The invention discloses a graphite electrode and a method for steel pipe inner diameter machining with the graphite electrode. The graphite electrode comprises an insulation shell, a connection cable, an insulation bearing plate and a graphite electrode head. The insulation shell is fixedly connected to the top end of the insulation bearing plate. One end of the connection cable penetrates through the insulation shell and is electrically connected with the graphite electrode head. The graphite electrode head comprises a connection portion and a working portion integrally connected to the bottom end of the connection portion. The connection portion is fixed to the insulation bearing plate. An electrolysis unit is composed of the graphite electrode, a bearing seat, a steel pipe, an electrolysis solution box and a sediment box. The electrolysis unit machines a stainless steel pipe inner diameter and can accurately correct the stainless steel pipe inner diameter, and the defects of wall deviation, protruding and the like caused by extrusion forming are overcome. Long stainless steel pipes with the length being more than 3 meters can be machined, the defects of traditional machining are overcome, working efficiency is high and the graphite electrode and the method for steel pipe inner diameter machining with the graphite electrode are friendly to the environment and free of pollution.
Description
Technical field
The present invention relates to a kind of graphite electrode, and utilize graphite electrode to carry out the method for pipe diameter processing.
Background technology
Current some seamless stainless steel long tubes on the market, produce owing to adopting extrusion process, internal diameter size control is even, usually there is the phenomenon of inclined to one side wall or oval projection to occur, cause meeting some industries that stainless steel tube internal diameter size accuracy and the uniformity are had relatively high expectations and use that (for example rotary target material is produced, require stainless steel tube internal diameter diameter 125mm, the positive and negative 0.5mm of id tolerance size, wall thickness differs in 0.5mm, but in existing long stainless tube, often exceedes 2～3 times of left and right of tolerance dimension).
Because stainless steel tube pipe is longer, adopt traditional mechanical turning, can only processing length approximately 0.5 meter, for the long stainless tube of 3 meters of length, cannot carry out turning machined steel bore.
Summary of the invention
One of technical problem to be solved by this invention is to provide a kind of graphite electrode, can accurately revise stainless steel tube internal diameter.
The present invention is what one of to solve the problems of the technologies described above by the following technical programs: a kind of graphite electrode, comprises an insulation crust, stube cable, insulation tray and a graphite electrode head; Described insulation crust is fixedly connected on the top of insulation tray; Insulation crust is passed in one end of described stube cable, and is electrically connected with graphite electrode head; Described graphite electrode head comprises that a junction and one are linked to an operate portions of this connecting portion bottom, and described connecting portion is fixed on insulation tray.
Preferably, the longitudinal axis place of described insulation tray is provided with single-revolution hole, and the bottom of this rotary hole inwall is equipped with a plurality of the first screw threads; The outer wall of described connecting portion is equipped with the second screw thread of a plurality of and described the first threaded engagement, and described connecting portion is connected on the rotary hole of insulation tray by described the first screw thread and the second screw thread rotation.
Preferably, described rotary hole is secondary shoulder hole, and described the first screw thread is located at the macropore inwall of this shoulder hole, and the top of described connecting portion can be connected to the aperture bottom of this shoulder hole.
Preferably, also comprise at least one exhaust unit, described exhaust unit comprises the return port and the steam vent that communicate with each other, and this return port is located on insulation tray, and this steam vent is located in described operate portions.
Preferably, described exhaust unit also comprises a breach, and this breach is located at the lower surface of insulation tray, and described return port, breach and steam vent connect successively.
Preferably, the radial section of described breach is trapezoidal.
Preferably, the lower surface of described operate portions caves inward corresponding to described steam vent place, forms depressed part.
Two of technical problem to be solved by this invention is to provide a kind of method of utilizing described graphite electrode to carry out pipe diameter processing, can process 3 meters of above long stainless tubes, and operating efficiency is high, environment friendly and pollution-free.
The present invention be solve the problems of the technologies described above by the following technical programs two: a kind of method of utilizing described graphite electrode to carry out pipe diameter processing, first configure an electrolysis unit, described electrolysis unit comprises graphite electrode, a supporting base, a steel pipe, an electrolyte case and a settling tank; Described supporting base is provided with a groove, an inlet opening and at least one osculum; Described groove is positioned at the upper surface of supporting base, and described steel pipe is inserted in this groove, and is provided with a sealing ring between the upper surface of groove and steel pipe; Described steel pipe, inlet opening and electrolyte case are communicated with successively; Described osculum is communicated with steel pipe, settling tank respectively; One power supply is electrically connected with described graphite electrode and steel pipe respectively;
The method of described pipe diameter processing specifically comprises the following steps:
(1) inwall of described steel pipe top is carried out to turning processing, extremely the length of own processing part is 100mm, and internal diameter is than the large 0.2mm of insulation tray external diameter of graphite electrode, and the endoporus of own processing part wall partially;
(2) by penstock installation on the groove of described supporting base, and with described sealing ring sealed steel pipe bottom, using steel pipe as anode; Then electrolyte is passed into steel pipe and described electrolyte case, and graphite electrode is placed in steel pipe and is contacted with electrolyte;
(3) described electrolysis unit is connected direct current, and steel pipe inner wall is carried out to electrolytic etching; In the time that steel pipe inner wall erodes to internal diameter and is greater than described insulation tray external diameter, graphite electrode can falling head, continues the steel pipe inner wall of corrosion near graphite electrode, and the above part of described insulation tray can not be corroded again;
(4) in electrolytic process, constantly in described electrolyte case, lead to electrolyte, then the electrolyte in electrolyte case flows in steel pipe by described inlet opening, simultaneously the electrolyte in steel pipe can carry sediment that electrolysis the produces described osculum of flowing through, and finally flows into and in described settling tank, carries out standing separation; In electrolytic process, electrolyte constantly carries out above-mentioned circulation.
Beneficial effect of the present invention is:
1, can accurately revise stainless steel tube internal diameter, the defect such as inclined to one side wall, projection of having avoided extrusion modling to cause, can meet the higher industry of pipe diameter required precision is used.
2, traditional turning processing can only processing length be the steel pipe of 0.5 meter of left and right, and processing method of the present invention can be processed 3 meters of above long stainless tubes, has made up the defect of traditional machining.
3, adopt electrolysis unit of the present invention and processing method operating efficiency high, every meter of machined steel bore only needs about 1h consuming time.
4, adopt processing method environmental protection of the present invention, because electrolysate only has ferric hydroxide precipitate and other elemental impurities precipitation and free of contamination hydrogen.
5, the electrolyte that the present invention adopts is sodium chloride solution, and electrolysis is complete can be reused through precipitation, has economy.
Accompanying drawing explanation
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural representation of graphite electrode in the present invention.
Fig. 2 is the structural representation of electrolysis unit in the present invention.
Fig. 3 is electrolysis principle figure in the present invention.
The specific embodiment
Refer to Fig. 1, a kind of graphite electrode 1, comprises an insulation crust 11, stube cable 12, insulation tray 13, a graphite electrode head 14 and an at least one exhaust unit 15; Described insulation crust 11 is fixedly connected on the top of insulation tray 13; Insulation crust 11 is passed in one end of described stube cable 12, and is electrically connected with graphite electrode head 14; Stube cable 12 is connected with dc source for graphite electrode 1.
Referring again to Fig. 1, the longitudinal axis place of described insulation tray 13 is provided with single-revolution hole 131, and the bottom of these rotary hole 131 inwalls is equipped with a plurality of the first screw threads (not shown); Be that described rotary hole 131 is secondary shoulder hole, described the first screw thread is located at macropore 1311 inwalls of this shoulder hole, and hereinafter described the top of connecting portion 141 can be connected to aperture 1312 bottoms of this shoulder hole, so design can make graphite electrode head 14 be fixed on more firmly on insulation tray 13.Insulation tray 13 is for controlling pipe diameter processing dimension, and its external diameter directly determines the internal diameter after stainless steel tube processing.
Referring again to Fig. 1, described graphite electrode head 14 comprises that a junction 141 and one are linked to an operate portions 142 of these connecting portion 141 bottoms, and described connecting portion 141 is fixed on insulation tray 13.The outer wall of described connecting portion 141 is equipped with second screw thread (not shown) of a plurality of and described the first threaded engagement, and described connecting portion 141 is connected in by described the first screw thread and the second screw thread rotation on the rotary hole 131 of insulation tray 13; Graphite cathode 5 adopts screw thread rotation to be connected with insulation tray 53 can guarantee that graphite electrode 5 is concentric with insulation tray 53, replacing parts for convenience detach simultaneously.The lower surface of described operate portions 142 caves inward corresponding to described steam vent place, forms depressed part 1421, to guide hydrogen to enter, makes hydrogen rapid diffusion.
Referring again to Fig. 1, described exhaust unit 15 comprises the return port 151 and the steam vent 152 that communicate with each other, and a breach 153, and this return port 151 is located on insulation tray 13, and this steam vent 152 is located in described operate portions 142; Described breach 153 is located at the lower surface of insulation tray 13, and described return port 151, breach 153 and steam vent 152 connect successively, and the radial section of described breach 153 is trapezoidal.Described return port 151 is for arranging hydrogen and backflow electrolyte, the gas that described steam vent 152 produces for discharging cell reaction, and the setting of described breach 153, can reflux electrolyte sooner more swimmingly.
Referring again to Fig. 2, a kind of method of utilizing described graphite electrode 1 to carry out pipe diameter processing, first configures an electrolysis unit 100, and described electrolysis unit 100 comprises graphite electrode 1, a supporting base 2, a steel pipe 3, an electrolyte case 4 and a settling tank 5; Described supporting base 2 is provided with a groove 21, an inlet opening 22 and at least one osculum 23; Described groove 21 is positioned at the upper surface of supporting base 2, and described steel pipe 3 is inserted in this groove 21, and is provided with a sealing ring 6 between the upper surface of groove 21 and steel pipe 3; Described steel pipe 3, inlet opening 22 and electrolyte case 4 are communicated with successively; Described osculum 23 is communicated with steel pipe 3, settling tank 5 respectively; One power supply 7 is electrically connected with described graphite electrode 1 and steel pipe 3 respectively;
The operation principle of described steel pipe 3 processing method for inside diameter is as follows:
As shown in Figure 3, utilize adjustable current dc source (being power supply 7) (input voltage 380V, input power 9kw).Stainless-steel pipe 3 connects just very anode of dc source (being power supply 7), and it is negative electrode that graphite electrode 1 connects dc source (being power supply 7) negative pole, and with sodium chloride solution as electrolyte.
Cell reaction:
Anode: Fe+-2e-→ Fe
2-negative electrode: 2H
2o+2e-→ 2OH
-+ H
2↑
Net reaction: Fe+2H
2o → Fe (OH)
2+ H
2↑
The Fe (OH) that cell reaction produces
2generate Fe (OH) with air haptoreaction
3(reddish-brown precipitation), other elements such as Ni, Cr etc. in stainless steel form precipitation because the electrolytic separation of Fe transfers simple substance to.
Referring again to Fig. 2, the method for described steel pipe 3 internal diameter processing specifically comprises the following steps:
(1) inwall at described steel pipe 3 tops is carried out to turning processing, length to own processing part is 100mm, internal diameter is than the large 0.2mm of the insulation tray of graphite electrode 1 13 external diameter, and the endoporus of own processing part is wall partially, because the direction of carrying out is corroded for calibrating stainless-steel pipe 3 in described own processing part.
(2) steel pipe 3 is arranged on the groove 21 of described supporting base 2, and with described sealing ring sealed steel pipe 3 bottoms, using steel pipe 3 as anode; Then electrolyte is passed into steel pipe 3 and described electrolyte case 4, and graphite electrode 1 is placed in steel pipe 3 and is contacted with electrolyte.
(3) described electrolysis unit 100 is connected direct current (380V), and steel pipe 3 inwalls are carried out to electrolytic etching; In the time that steel pipe 3 inner wall corrosions are greater than described insulation tray 13 external diameter to internal diameter, graphite electrode 1 meeting falling head, continues steel pipe 3 inwalls of corrosion near graphite electrode 1, and more than 13 part of described insulation tray can not be corroded again.
Because Anode-cathode Distance is nearer, the current density of two inter-stages is larger, corrosion rate is also larger, if there is inclined to one side wall or have projection in steel pipe 3 inwalls, due to bossing or partially the described graphite electrode head 14 of wall part distance is nearer, thereby corrosion is also relatively very fast, so guarantee the homogeneity of steel pipe 3 inwall sizes after corrosion.
(4) in electrolytic process, constantly toward the interior logical electrolyte of described electrolyte case 4, then the electrolyte in electrolyte case 4 flows in steel pipe 3 by described inlet opening 22, simultaneously the electrolyte in steel pipe 3 can carry sediment that electrolysis the produces described osculum 23 of flowing through, and finally flows in described settling tank 5 and carries out standing separation; In electrolytic process, electrolyte constantly carries out above-mentioned circulation.
The sediment that electrolysis produces is because Action of Gravity Field can flow into settling tank 5 with electrolyte, electrolyte in settling tank 5 after staticly settling an available pipeline pass in electrolyte case 4 and circulate.Circulate electrolyte not only can guarantee that the ion concentration of conversion zone is stable, and has taken away the heat that electrolysis discharges, and is conducive to carrying out fast of cell reaction.
The present invention has the following advantages:
1, can accurately revise stainless steel tube 3 internal diameters, the defect such as inclined to one side wall, projection of having avoided extrusion modling to cause, can meet the industry that steel pipe 3 internal diameters are had relatively high expectations and use.
2, traditional turning processing can only processing length be the steel pipe 3 of 0.5 meter of left and right, and processing method of the present invention can be processed 3 meters of above long stainless tubes, has made up the defect of traditional machining.
3, adopt electrolysis unit 100 of the present invention and processing method operating efficiency high, process every meter of steel pipe 3 internal diameter and only need about 1h consuming time.
4, adopt processing method environmental protection of the present invention, because electrolysate only has ferric hydroxide precipitate and other elemental impurities precipitation and free of contamination hydrogen.
5, the electrolyte that the present invention adopts is sodium chloride solution, and electrolysis is complete can be reused through precipitation, has economy.
Claims (8)
1. a graphite electrode, is characterized in that: comprise an insulation crust, stube cable, insulation tray and a graphite electrode head; Described insulation crust is fixedly connected on the top of insulation tray; Insulation crust is passed in one end of described stube cable, and is electrically connected with graphite electrode head; Described graphite electrode head comprises that a junction and one are linked to an operate portions of this connecting portion bottom, and described connecting portion is fixed on insulation tray.
2. a kind of graphite electrode as claimed in claim 1, is characterized in that: the longitudinal axis place of described insulation tray is provided with single-revolution hole, and the bottom of this rotary hole inwall is equipped with a plurality of the first screw threads; The outer wall of described connecting portion is equipped with the second screw thread of a plurality of and described the first threaded engagement, and described connecting portion is connected on the rotary hole of insulation tray by described the first screw thread and the second screw thread rotation.
3. a kind of graphite electrode as claimed in claim 2, is characterized in that: described rotary hole is secondary shoulder hole, and described the first screw thread is located at the macropore inwall of this shoulder hole, and the top of described connecting portion can be connected to the aperture bottom of this shoulder hole.
4. a kind of graphite electrode as claimed in claim 1, it is characterized in that: also comprise at least one exhaust unit, described exhaust unit comprises the return port and the steam vent that communicate with each other, and this return port is located on insulation tray, and this steam vent is located in described operate portions.
5. a kind of graphite electrode as claimed in claim 4, is characterized in that: described exhaust unit also comprises a breach, and this breach is located at the lower surface of insulation tray, and described return port, breach and steam vent connect successively.
6. a kind of graphite electrode as claimed in claim 5, is characterized in that: the radial section of described breach is trapezoidal.
7. a kind of graphite electrode as claimed in claim 4, is characterized in that: the lower surface of described operate portions caves inward corresponding to described steam vent place, forms depressed part.
8. a method of utilizing the graphite electrode described in claim 1 to carry out pipe diameter processing, is characterized in that: first configure an electrolysis unit, described electrolysis unit comprises graphite electrode, a supporting base, a steel pipe, an electrolyte case and a settling tank; Described supporting base is provided with a groove, an inlet opening and at least one osculum; Described groove is positioned at the upper surface of supporting base, and described steel pipe is inserted in this groove, and is provided with a sealing ring between the upper surface of groove and steel pipe; Described steel pipe, inlet opening and electrolyte case are communicated with successively; Described osculum is communicated with steel pipe, settling tank respectively; One power supply is electrically connected with described graphite electrode and steel pipe respectively;
The method of described pipe diameter processing specifically comprises the following steps:
(1) inwall of described steel pipe top is carried out to turning processing, extremely the length of own processing part is 100mm, and internal diameter is than the large 0.2mm of insulation tray external diameter of graphite electrode, and the endoporus of own processing part wall partially;
(2) by penstock installation on the groove of described supporting base, and with described sealing ring sealed steel pipe bottom, using steel pipe as anode; Then electrolyte is passed into steel pipe and described electrolyte case, and graphite electrode is placed in steel pipe and is contacted with electrolyte;
(3) described electrolysis unit is connected direct current, and steel pipe inner wall is carried out to electrolytic etching; In the time that steel pipe inner wall erodes to internal diameter and is greater than described insulation tray external diameter, graphite electrode can falling head, continues the steel pipe inner wall of corrosion near graphite electrode, and the above part of described insulation tray can not be corroded again;
(4) in electrolytic process, constantly in described electrolyte case, lead to electrolyte, then the electrolyte in electrolyte case flows in steel pipe by described inlet opening, simultaneously the electrolyte in steel pipe can carry sediment that electrolysis the produces described osculum of flowing through, and finally flows into and in described settling tank, carries out standing separation; In electrolytic process, electrolyte constantly carries out above-mentioned circulation.
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| CN201410101643.5A CN103878457B (en) | 2014-03-19 | 2014-03-19 | Graphite electrode and method for steel pipe inner diameter machining with graphite electrode |
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| CN201410101643.5A CN103878457B (en) | 2014-03-19 | 2014-03-19 | Graphite electrode and method for steel pipe inner diameter machining with graphite electrode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111037013A (en) * | 2019-12-06 | 2020-04-21 | 西安铂力特增材技术股份有限公司 | Electrolytic machining device for internal hole structure part |
| CN114473378A (en) * | 2022-01-07 | 2022-05-13 | 西安泰金工业电化学技术有限公司 | Cathode roller processing device with high conductivity and processing flow thereof |
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| US4705615A (en) * | 1985-08-05 | 1987-11-10 | Daimler-Benz Aktiengesellschaft | Electrode arrangement for the electrochemical metal erosion process for producing a tooth system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111037013A (en) * | 2019-12-06 | 2020-04-21 | 西安铂力特增材技术股份有限公司 | Electrolytic machining device for internal hole structure part |
| CN114473378A (en) * | 2022-01-07 | 2022-05-13 | 西安泰金工业电化学技术有限公司 | Cathode roller processing device with high conductivity and processing flow thereof |
| CN114473378B (en) * | 2022-01-07 | 2023-03-14 | 西安泰金新能科技股份有限公司 | Cathode roller machining device with high conductivity and machining process thereof |
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