CN103182744A - Continuous processing method and processing production line for graphite electrodes - Google Patents

Continuous processing method and processing production line for graphite electrodes Download PDF

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Publication number
CN103182744A
CN103182744A CN2011104604810A CN201110460481A CN103182744A CN 103182744 A CN103182744 A CN 103182744A CN 2011104604810 A CN2011104604810 A CN 2011104604810A CN 201110460481 A CN201110460481 A CN 201110460481A CN 103182744 A CN103182744 A CN 103182744A
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CN
China
Prior art keywords
graphite electrode
cylindrical
clamping
hole
boring
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Pending
Application number
CN2011104604810A
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Chinese (zh)
Inventor
陈善元
戴爱国
朱强
叶佩青
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TAIXING CHENGUANG HIGH-TECH DEVELOPMENT CO LTD
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TAIXING CHENGUANG HIGH-TECH DEVELOPMENT CO LTD
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Priority to CN2011104604810A priority Critical patent/CN103182744A/en
Publication of CN103182744A publication Critical patent/CN103182744A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a continuous processing method and a processing production line for graphite electrodes, which belong to the technical field of graphite machining. The technical scheme is that the following transporting devices are sequentially connected in series with one another to achieve corresponding processes, wherein a double-end positioning hole boring mill is used for clamping a cylindrical boring double-end positioning hole for a cylindrical graphite electrode blank; a multicutter cylindrical lathe is used for supporting the double-end positioning hole for a graphite electrode blank, and is used for lathing the cylindrical surface; a double-end taper hole boring mill is used for clamping the cylinder, and is used for boring the double-end taper hole; and a double-end taper thread carding machine tool, with an included angle between the axles of a carding tool and a milling tool, is used for clamping the cylinder, carding the inner taper thread in a double-end manner, and milling the end face which dents 0.02 mm-0.04 mm into the inner taper thread hole. The continuous processing method and the processing production line for the graphite electrodes have breakthrough over the long-established conventional technology arrangement, not only optimize the technology steps, but also improve equipment and adjust technology parameter, so as to effectively optimize the graphite electrodes, remarkably prolong the durable years of the graphite electrodes, reduce the smelting manufacture cost and help to save electric power.

Description

Graphite electrode continuous process and machining production line
Technical field
The present invention relates to a kind of graphite electrode processing method, especially a kind of graphite electrode continuous process also relates to the machining production line of realizing this method simultaneously, belongs to graphite Machining Technology field.
Background technology
Graphite electrode is essential for electric furnace, the end face of its cylindrical base have by<the interconnective inside tapered thread of shape bipyramid male connection (referring to Fig. 1).Over 10 years, following basic technology route is adopted in the contact of graphite electrode processing automatically all the time: 1, three-jaw folder cylindrical, both-end bore hole surface scraping; 2, turning; 3, both-end comb processing taper thread.Its relevant process equipment sees that application number is 03222308.5 Chinese patent application file.
In long-term practice, the applicant finds, the following problems that graphite electrode exists in the use at the scene is relevant with its process structure: 1) average loss of electrode is the 4-5kg/T steel, causes production cost to be difficult to reduction; 2) after the two economize on electricity utmost points connect by joint, when cylindrical is held near the junction, the phenomenon of rear electrode shear fracture appears clamping sometimes; 3) be clamped in the inside tapered thread place for fear of cylindrical, need the field-applied mark, both inaccurate, also inconvenient.Because graphite electrode is bulky, price is high, frequently changes not only time-consumingly, and is unfavorable for energy-conservationly, and has increased to smelt to produce and consumes.Therefore be necessary further investigation, by the improvement of process structure and the optimization of process, eliminate the on-the-spot problem that exists of using, prolong its average life span as far as possible, thereby under the prerequisite that guarantees smelting quality, effectively reduce production costs.
Summary of the invention
Primary and foremost purpose of the present invention is: at the problem of above-mentioned prior art existence, a kind of graphite electrode continuous process that can significantly reduce the graphite electrode consume is proposed, provide corresponding machining production line simultaneously, thereby reduce smelting cost, and help energy-conservation.
Further aim of the present invention is: propose a kind of graphite electrode continuous process that automatic mark applies of finishing, thereby the convenient execute-in-place of smelting avoids graphite electrode to answer clamping improper and damage.
In order to reach above primary and foremost purpose, graphite electrode continuous process of the present invention comprises the following processing step that is connected according to the order of sequence by carrying:
The first step, the cylindric graphite electrode blank of four paws clamping cylindrical boring both-end locating hole;
Second goes on foot, holds graphite electrode blank end face locating hole, turning surface;
The 3rd step, clamping cylindrical, boring both-end taper hole;
The 4th step, clamping cylindrical, both-end comb processing inside tapered thread, and processing is towards the end face of 0.03 ± 0.01 millimeter of inside tapered thread hole depression.
The adjustment of above processing step and variation are because of the further investigation of applicant to the on-the-spot operating position of graphite electrode.At first, the applicant finds by test analysis, the collection skin clothes effect of energising after-current will make the electrode periphery of desirable contact condition have big electric current, and internal current is less, in fact, after the traditional electrode processing technology can not guarantee that adjacent electrode connects by joint, the cylindrical border well contacts (referring to Fig. 1,9 is adjacent electrodes among the figure, and 9-1 is electrode contact, and 9-2 is clamping device), therefore make electrode often conduct electricity by internal current, resistance is bigger as a result, heating easily, thus caused the average loss of graphite electrode higher.And the technology after improving is by the end face of the suitable concave of processing, guaranteed that electrode connects the good contact of cylindrical border, back, thereby fully form skin current, namely because having bigger contact area, electrode reduced resistance, suppressed heating again, thereby the export license of smelting steel per ton is significantly reduced.
In addition, applicant's mechanical analysis and calculating are found, the reason of shear fracture was derived from the coaxiality error of electrode cylindrical and inside tapered thread after electrode clamped, because traditional handicraft is clamping graphite blank cylindrical boring end-face hole at first, need bigger clamping force during clamping, and there is heat treatment deformation in the graphite electrode blank, strain after the clamping is recovered behind bore hole, thereby can't guarantee the axiality of cylindrical and inside tapered thread, joint during the result uses connects the location and produces shear stress with the cylindrical clamping, causes fracture (referring to Fig. 1).Technology after the improvement is boring end face locating hole at first, and the cutting output of this moment is few, and chucking power is very little, then with locating hole positioning car cylindrical, clamping cylindrical boring end face taper hole has been guaranteed the axiality of cylindrical and inside tapered thread again, so the clamping phenomenon of rupture in having stopped substantially to use.
The continuous machining production line of graphite electrode of realizing above-mentioned processing method comprises the following equipment of being connected according to the order of sequence by conveying equipment:
Both-end locating hole boring machine is used for the cylindric graphite electrode blank of clamping cylindrical boring both-end locating hole;
Multitool cylindrical lathe is used for holding graphite electrode blank end face locating hole, turning surface;
The both-end taper hole boring lathe is used for the clamping cylindrical, boring both-end taper hole;
Chasing tool and milling cutter axis have the both-end taper thread comb machining tool of angle, are used for the clamping cylindrical, both-end comb processing inside tapered thread, and mill processing towards the end face of 0.03 ± 0.01 millimeter of inside tapered thread hole depression.
In order to reach further purpose, of the present inventionly also comprised for the 5th step: in the graphite electrode rotary course, apart from the cylindrical of end face greater than the taper thread hole depth, form the safety label line by the roller roller coating of dipping paint.
This shows, the present invention arranges by the traditional handicraft of breaking for many years, when optimizing processing step by improve equipment, adjusting process control parameter, effectively optimized graphite electrode, significant prolongation the service life of graphite electrode, reduce the smelting production cost, and helped to save electric energy.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is existing electrode clamp position enlarged diagram.
Fig. 2 is the general structure schematic diagram of one embodiment of the invention.
Fig. 3 is the side view of Fig. 2.
Fig. 4 is the both-end taper thread comb machining tool structural representation among Fig. 2.
Fig. 5 is the cross section structure schematic diagram at the clamp bracket place of Fig. 4.
Fig. 6 is the structure for amplifying schematic diagram of Fig. 4 unit head part.
Fig. 7 is position pen machine structural representation at the bottom of the graphite electrode hole among Fig. 2.
Fig. 8 is the side view of Fig. 7.
The specific embodiment
Embodiment one
The continuous machining production line of the graphite electrode of present embodiment such as Fig. 2, shown in Figure 3, suspension type conveying equipment 1 with following equipment be connected into according to the order of sequence continuous electrode machining production line (concrete structure of conveying equipment can be referring to following Chinese patent application document: CN200910030352.0 completely numerical control high-precision charcoal processing automatic line, CN03222308.0C electrode automatic machining line: the CN02112654.2 fully numerically-controlled flexible automatic processing line for graphite electrode connector):
1) be positioned at centering and go up part support 8 both-end locating hole boring machine 2 afterwards, be used for the cylindric graphite electrode blank of clamping cylindrical boring both-end locating hole, its basic structure and general both-end boring machine are similar.
2) multitool cylindrical lathe 3 is used for holding graphite electrode blank end face locating hole, car electrode blank outer round surface, and its concrete structure is referring to CN02258173.1 electrode multitool cylindrical lathe.
3) the both-end taper hole boring lathe 4, for the electrode cylindrical after the clamping Vehicle Processing, and boring both-end taper hole, its concrete structure strikes off lathe referring to CN02258172.3 electrode both-end bore hole.
Both-end taper thread comb machining tool 5, its chasing tool and milling cutter axis have angle, are used for clamping graphite electrode cylindrical, both-end comb processing inside tapered thread, and mill processing towards the end face of 0.03 ± 0.01 millimeter of inside tapered thread hole depression.Its concrete structure such as Fig. 4, Fig. 5 and shown in Figure 6, the two ends of lathe bed 5-1 are supporting motive force head 5-2 respectively, the cross track upper support work supporting block 5-3 at lathe bed middle part and the clamp bracket 5-4 of symmetrical distribution and work supporting block both sides.Main motor 5-6 is settled in the casing top of unit head 5-2, and this main motor drives horizontal spindle 5-7 by belt transmission.Unit head casing rear side is equipped with to the slip ring casing 5-5 of each motor power supply of unit head.
Has the radial guidance that constitutes moving sets with planker 5-11 radially on the end plate 5-15 of horizontal spindle 5-7.The chasing tool 5-7 that is driven by horizontal chasing tool axle 5-9 by the chasing tool motor respectively radially is housed on the planker 5-11, and by the face cutter 5-8 of face cutter motor by facing cut cutter shaft 5-10 drive, this facing cut cutter shaft tilts towards major axes orientation, and forming 0.02 °-0.05 °, the best with the chasing tool axle is 0.04 ° of angle.
When the electrode workpiece 9 that processes the end face taper hole is supported on the work supporting block, after the clamp bracket clamping by both sides, main shaft rotates under the driving of main motor, drives the revolution of chasing tool and face cutter, and chasing tool and face cutter are respectively by separately motor-driven rotation simultaneously.When chasing tool when the Compound Machining by rotation and revolution goes out inside tapered thread in taper hole, face cutter goes out the end face of taper hole outer rim by the Compound Machining of rotation and revolution, because the facing cut cutter shaft tilts towards major axes orientation, so this end face is towards the middle concavity of 0.03 ± 0.01 millimeter of inside tapered thread hole depression.Because behind the cylindrical car, electrode cylindrical straightness error≤0.06mm, therefore after with clamping bore hole and the comb machining screw, thread center's line and outer circles≤0.10mm.
During use, the graphite electrode of the suitable concave of both ends of the surface has been guaranteed the good contact of cylindrical border after connecting, and forms skin current during conduction, has suppressed heating when reducing resistance, thereby makes the export license of smelting steel per ton significantly reduce to the 1-2kg/T steel.
In addition, the clamp bracket of both-end taper thread comb machining tool 5 as shown in Figure 5, lathe bed 5-1 goes up and settles vertical forward and backward clamping planker 5-14 and the 5-13 that is driven by reverse-flighted screw, settle relative clamping claw 5-4-1 respectively on vertical forward and backward clamping planker, clamping claw has the inclined-plane of clamping up and down of symmetry.During holding workpiece, compare with 3 clamp structures of tradition, the cylindrical of 4 easier assurance graphite electrodes of clamping is concentric with inside tapered thread, thereby more is conducive to guarantee the reliable connection of adjacent electrode.Other CONSTRUCTED SPECIFICATION of this both-end taper thread comb machining tool 5 can be referring to the relevant description of the two screw thread comb of CN03220355.1 graphite electrode machining tool, the CN200620125239.2 numerical control carbon resistance rod conical surface and thread cutting machine, the two screw thread comb of CN03112972.2 graphite electrode machining tool, CN99229425.8 numerical control electrode chaser machining tool.
4) be positioned at position pen machine 7 at the bottom of the graphite electrode hole after the checkout equipment 6, be used at the graphite electrode rotary course, apart from the cylindrical of end face greater than the taper thread hole depth, form the safety label line by the roller roller coating of dipping paint.
The concrete structure of position pen machine 7 as shown in Figure 7 and Figure 8 at the bottom of this graphite electrode hole, the middle part of base 7-1 has the workpiece support turning device 7-3 that is positioned on the hoist cylinder 7-2, the both sides of workpiece support turning device 7-3 has the chalker that is supported on the lifting guide pillar 7-4 respectively, two lifting guide pillar 7-4 are connected with the piston rod of hoist cylinder 7-2 by the lifting support 7-5 of level, therefore can under driving, hoist cylinder order about the chalker elevating movement.Chalker is made of scribing rolling wheel 7-6 and the paint box 7-7 that is positioned under the scribing rolling wheel.Wheel shaft and the hydraulic motor output shaft of scribing rolling wheel 7-6 are in transmission connection.
When graphite electrode 9 is being rolled under conveying device drives on the workpiece support turning device 7-3 after the static stable and centering, crane 7-5 rises under the drive of hoist cylinder 7-2, and then order about the chalker that is positioned on the lifting guide pillar 7-4 and rise, until swing roller 7-6 contact graphite electrode excircle of workpiece surface.Afterwards, swing roller 7-6 begins rotation by chain gear transmission under fluid motor-driven, and the drive workpiece rotates slowly turn, realize pure rolling each other, in this process, swing roller dips in paint application at graphite electrode cylindrical contact position from paint the box, thereby forms mark line at the bottom of the hole automatically, has avoided on-the-spot manual trouble of ruling.
But other content list of references of the continuous machining production line of present embodiment graphite electrode also has the omnipotent charcoal piece grinding machine of the total control of CN200620073076.8, CN200520070093.1 seven station electrode contact machining production lines, CN99229426.6, the two chasing tool machining tools of numerical control electrode joint screw thread.Add man-hour, the equipment of production line is arranged and has been realized the first step, the cylindric graphite electrode blank of four paws clamping cylindrical boring both-end locating hole automatically; Second goes on foot, holds graphite electrode blank end face locating hole, turning surface; The 3rd step, clamping cylindrical, boring both-end taper hole; The 4th step, clamping cylindrical, both-end comb processing inside tapered thread, and processing is towards the end face of 0.03 ± 0.01 millimeter of inside tapered thread hole depression; The 5th step, detection back apart from the cylindrical of end face greater than the taper thread hole depth, form the safety label line by the roller roller coating of dipping paint in the graphite electrode rotary course.
Facts have proved that after adopting graphite electrode that present embodiment makes and joint being connected, end face does not have the gap, contact rate convergence 100%, during energising, 80% above electric current passes through from contacting good end face maximum gauge, and resistance is very little, electric current less than 20% passes through from the joint junction, heating has seldom been eliminated because of what resistance heating caused and has been blown phenomenon, service life significant prolongation, therefore effectively reduce the smelting production cost, saved electric energy.

Claims (8)

1. graphite electrode continuous process comprises the following steps that are connected according to the order of sequence by carrying:
The first step, the cylindric graphite electrode blank of four paws clamping cylindrical boring both-end locating hole;
Second goes on foot, holds graphite electrode blank end face locating hole, turning surface;
The 3rd step, clamping cylindrical, boring both-end taper hole;
The 4th step, clamping cylindrical, both-end comb processing inside tapered thread, and processing is towards the end face of 0.03 ± 0.01 millimeter of inside tapered thread hole depression.
2. graphite electrode continuous process according to claim 1 is characterized in that: also comprised for the 5th step, in the graphite electrode rotary course, apart from the cylindrical of end face greater than the taper thread hole depth, form the safety label line by the roller roller coating of dipping paint.
3. continuous machining production line of graphite electrode is characterized in that comprising the following equipment of being connected according to the order of sequence by conveying equipment:
Both-end locating hole boring machine is used for the cylindric graphite electrode blank of clamping cylindrical boring both-end locating hole;
Multitool cylindrical lathe is used for holding graphite electrode blank end face locating hole, turning surface;
The both-end taper hole boring lathe is used for the clamping cylindrical, boring both-end taper hole;
Chasing tool and milling cutter axis have the both-end taper thread comb machining tool of angle, are used for the clamping cylindrical, both-end comb processing inside tapered thread, and mill processing towards the end face of 0.03 ± 0.01 millimeter of inside tapered thread hole depression.
4. the continuous machining production line of graphite electrode according to claim 3, it is characterized in that: also contain position pen machine at the bottom of the graphite electrode hole, be used at the graphite electrode rotary course, apart from the cylindrical of end face greater than the taper thread hole depth, form the safety label line by the roller roller coating of dipping paint.
5. according to claim 3 or the continuous machining production line of 4 described graphite electrodes, it is characterized in that: the lathe bed two ends of described both-end taper thread comb machining tool are the supporting motive force head respectively, the cross track upper support work supporting block at lathe bed middle part and the clamp bracket of symmetrical distribution and work supporting block both sides; Main motor is settled in the casing top of described unit head, and described main motor drives horizontal spindle by belt transmission.
6. the continuous machining production line of graphite electrode according to claim 5 is characterized in that: have the radial guidance that constitutes moving sets with planker radially on the end plate of described horizontal spindle; The chasing tool that is driven by horizontal chasing tool axle by the chasing tool motor respectively is housed on the described radially planker, and by the face cutter of face cutter motor by the drive of facing cut cutter shaft, described facing cut cutter shaft tilts towards major axes orientation, forms 0.02 °-0.05 ° angle with the chasing tool axle.
7. the continuous machining production line of graphite electrode according to claim 6, it is characterized in that: settle the vertical forward and backward clamping planker that is driven by reverse-flighted screw on the lathe bed of described both-end taper thread comb machining tool, settle relative clamping claw respectively on described vertical forward and backward clamping planker, described clamping claw has the inclined-plane of clamping up and down of symmetry.
8. the continuous machining production line of graphite electrode according to claim 4, it is characterized in that: the base of position pen machine middle part has the workpiece support turning device that is positioned on the hoist cylinder at the bottom of the described graphite electrode hole, and the both sides of described workpiece support turning device has the chalker that is supported on the lifting guide pillar respectively; Two lifting guide pillars are connected with the piston rod of hoist cylinder by the lifting support of level; Described chalker is made of scribing rolling wheel and the paint box that is positioned under the scribing rolling wheel, and wheel shaft and the hydraulic motor output shaft of described scribing rolling wheel are in transmission connection.
CN2011104604810A 2011-12-27 2011-12-27 Continuous processing method and processing production line for graphite electrodes Pending CN103182744A (en)

Priority Applications (1)

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2395835Y (en) * 1999-09-20 2000-09-13 陈善元 Numerically controlled comb tool machine tool for processing electrode screw
CN2395836Y (en) * 1999-09-20 2000-09-13 陈善元 Numerically controlled electrode joint screw double comb tool machine tool
CN1404953A (en) * 2002-02-08 2003-03-26 陈善元 Fully numerically-controlled flexible automatic processing line for graphite electrode connector
CN1438087A (en) * 2003-03-14 2003-08-27 陈善元 Graphite electrode double scew-thread carding machine tool
CN2574808Y (en) * 2002-11-01 2003-09-24 陈善元 Simple and easy hole boring machine
CN2574811Y (en) * 2002-11-01 2003-09-24 陈善元 New structure of quincuncial key gear milling machine
CN2604266Y (en) * 2003-03-14 2004-02-25 陈善元 Graphite electrode double-thread chaser processing machine tool
CN2617519Y (en) * 2003-06-03 2004-05-26 陈善元 Automatic electrode processing line
CN200963743Y (en) * 2006-11-13 2007-10-24 姜堰市大伦精机制造有限公司 Numerical control carbon electrode conical surface and screw thread processing machine tool
CN101524810A (en) * 2009-03-16 2009-09-09 陈善元 Completely numerical control high-precision charcoal processing automatic line
CN201342740Y (en) * 2009-01-20 2009-11-11 陈善元 High-precision carbon-block automatic processing device

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2395835Y (en) * 1999-09-20 2000-09-13 陈善元 Numerically controlled comb tool machine tool for processing electrode screw
CN2395836Y (en) * 1999-09-20 2000-09-13 陈善元 Numerically controlled electrode joint screw double comb tool machine tool
CN1404953A (en) * 2002-02-08 2003-03-26 陈善元 Fully numerically-controlled flexible automatic processing line for graphite electrode connector
CN2574808Y (en) * 2002-11-01 2003-09-24 陈善元 Simple and easy hole boring machine
CN2574811Y (en) * 2002-11-01 2003-09-24 陈善元 New structure of quincuncial key gear milling machine
CN1438087A (en) * 2003-03-14 2003-08-27 陈善元 Graphite electrode double scew-thread carding machine tool
CN2604266Y (en) * 2003-03-14 2004-02-25 陈善元 Graphite electrode double-thread chaser processing machine tool
CN2617519Y (en) * 2003-06-03 2004-05-26 陈善元 Automatic electrode processing line
CN200963743Y (en) * 2006-11-13 2007-10-24 姜堰市大伦精机制造有限公司 Numerical control carbon electrode conical surface and screw thread processing machine tool
CN201342740Y (en) * 2009-01-20 2009-11-11 陈善元 High-precision carbon-block automatic processing device
CN101524810A (en) * 2009-03-16 2009-09-09 陈善元 Completely numerical control high-precision charcoal processing automatic line

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Application publication date: 20130703