CN102653021A - Milling machine - Google Patents
Milling machine Download PDFInfo
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- CN102653021A CN102653021A CN2012101383083A CN201210138308A CN102653021A CN 102653021 A CN102653021 A CN 102653021A CN 2012101383083 A CN2012101383083 A CN 2012101383083A CN 201210138308 A CN201210138308 A CN 201210138308A CN 102653021 A CN102653021 A CN 102653021A
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Abstract
The invention provides a milling machine for machining high-hardness rollers (1). The milling machine comprises a milling cutter seat, a control system, a motor (2) arranged on the milling cutter seat, a discharging electrode (3) which is arranged on the motor (2) and connected with the control system and can discharge the high-hardness roller (1), a roller clamping disk insulated with the high-hardness roller (1), a tail seat arranged on the roller clamping disk, and a medium conveying device (4) for spraying insulation media into a clearance between the discharging electrode (3) and the roller (1), wherein the shape of the section of the discharging electrode (3) is the same as that of a transverse rib slot of the high-hardness roller (1). A compound boron nitride milling cutter is changed into the discharging electrode; electric spark non-contact machining replaces the conventional hard machining of a compound boron nitride milling cutter; the problem that the cost is increased because of the compound boron nitride milling cutter is solved; and the machining efficiency is obviously improved.
Description
Technical field
The present invention relates to the Roller Machining technical field, more particularly, relate to a kind of milling machine.
Background technology
In the building field, screw-thread steel has become construction material indispensable in the reinforced concrete building in modern times, and it is widely used in the architectural engineerings such as house, bridge and road.
The hardness of plain cast iron screw-thread steel roll is generally HRC57-65, no matter to its turning or cross rib milling (the cross rib milling comprises processing cross rib groove and rolling sign), the milling cutter of conventional steel alloy, high speed steel material can both be competent at; But, wear no resistance, in process of production because the plain cast iron roll hardness is low; The steel transportation amount of screw-thread steel less relatively (for example the screw-thread steel list groove steel transportation amount of Φ 12 specifications has only about 80 tons); Therefore milling train needs frequent adjustment roll change change groove, and guaranteeing the ordinary production of screw-thread steel, but the frequent roll change of screw-thread steel is changed groove and can be made its appearance and size fluctuation big again; Quality is unstable, has had a strong impact on the ordinary production of screw-thread steel.
Want to address the above problem, just must improve the wearability of the roll of machining screw steel, the method for the raising wearability that people generally adopt is still being used screw-thread steel yaw cross rib milling machine (three-shaft linkage precise numerical control machine exactly; Adopt lead screw transmission and step motor drive, based on the GMT-008 of the universal numerical control system control of PC, positioning accuracy is 0.001mm) prerequisite under; Use high hardness materials such as high-speed steel even tungsten carbide instead and make roll, show through using, high-speed steel roll list groove steel transportation amount improves 3-4 doubly than grain roll; Tungsten carbide roll can reach more than 10 times, and the roll (as shown in Figure 1) that therefore uses high hardness material to make receives people's favor more, still; Use high hardness material to make roll and also brought a bigger problem: make processing difficulties; Because high hardness material itself is hard (the high-speed steel roll case hardness has surpassed HRC85), using screw-thread steel yaw cross rib milling machine to make in the process of processing roll, used cutter just can only be selected the higher composite nitride boron milling cutter of hardness when it was carried out turning, cross rib milling; But because in the process of reality; Composite nitride boron milling cutter installation strength and toughness are all not enough, have to reduce the bite that adds man-hour, have not only influenced working (machining) efficiency; More serious is; Because the segregation of the homemade high-speed steel roll hardness of part is inhomogeneous, there are mass defects such as impurity in inside, uses the very expensive composite nitride boron milling cutter of price; Careless slightlyly just might cause the damage of composite nitride boron milling cutter to scrap, significantly improve processing cost.
In sum, how a kind of milling machine being provided, to realize reducing the Roller Machining cost, improving working (machining) efficiency, is present those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of milling machine, processing cost problem of higher when processing the high hardness material roll to solve.
In order to address the above problem, the present invention provides following technical scheme:
A kind of milling machine is used to process high-hardness roller, comprises the control system that milling cutter seat and control milling machine are worked automatically, it is characterized in that, also comprises:
Be arranged on the motor on the said milling cutter seat;
Be arranged on the said motor, link to each other with said control system, can be to the sparking electrode of said high-hardness roller discharge with the said high-hardness roller of melt-processed, the cross sectional shape of said sparking electrode is corresponding with the cross rib groove shape of said high-hardness roller;
With the insulation of said high-hardness roller, be used for the roll chuck and the tailstock that said roll chuck is set of the said high-hardness roller of clamping; With
Spray the medium conveying apparatus of dielectric to the gap of said sparking electrode and said roll.
Preferably; In the above-mentioned milling machine, said control system is provided with medium conveying apparatus start stop switch, motor operating switch, the quick centering rise of milling cutter seat module, regularly cutter lifting height and control module, regularly cutter lifting signal indicating module and fluid pressure detection module at interval.
Preferably, in the above-mentioned milling machine, said control system can feed back to the voltage signal of discharging gap the said milling cutter seat major axis X control of position module of control to control said sparking electrode stable discharging.
Preferably, in the above-mentioned milling machine, the power supply that is communicated with said sparking electrode and roll is compound transistor pulse generator.
Preferably, in the above-mentioned milling machine, said sparking electrode and roll are connected with power supply through the electrode workpiece respectively.
Preferably, in the above-mentioned milling machine, said sparking electrode is the red copper electrode.
Preferably, in the above-mentioned milling machine, but also comprise the electrically conductive graphite that connects said motor and the said sparking electrode piece that powers on.
Preferably, in the above-mentioned milling machine, the power supply of said motor is a variable-frequency power sources.
Preferably, in the above-mentioned milling machine, said medium conveying apparatus is the high flow rate oil supply pump.
Existing for prior art, the invention has the beneficial effects as follows:
In the milling machine provided by the invention; Milling cutter seat, control system, roll chuck and the tailstock of existing screw-thread steel yaw cross rib milling machine are improved respectively; Composite nitride boron milling cutter no longer is installed on the milling cutter seat; But motor and sparking electrode have been installed, and and roll chuck and tailstock have been done the insulating processing, other parts that can double thread steel yaw cross rib milling machine when making the discharge of sparking electrode breaker roll impact.
Adopt the electric spark breaker roll to add man-hour, utilize the pulse power, a utmost point of power supply connects sparking electrode; Another utmost point connects roll, and the two poles of the earth are all immersed in the liquid medium that is sprayed by medium conveying apparatus, adds the man-hour sparking electrode under the control of control system; All the time keep a very little discharging gap with roll, during the sparking electrode discharge, electric spark can puncture the liquid medium of two interpolar closest approaches; Form discharge channel, because the sectional area of discharge channel is very little, and discharge time is extremely short; Cause energy height to be concentrated, the TRANSIENT HIGH TEMPERATURE that region of discharge produces is enough to make the material fusing even the evaporation of roll, so that forms a small rut.
After the above-mentioned discharge first time finishes; Through very short blanking time; Discharge for the second time can take place at another interpolar closest approach again, and so high-frequency circulates down (each second several thousand up to ten thousand times), because the cross sectional shape of sparking electrode is corresponding with the cross sectional shape of screw-thread steel cross rib; So sparking electrode finally processes on roll and the corresponding groove of screw-thread steel cross rib shape under the control of control system.In the milling machine provided by the invention, change composite nitride boron milling cutter into sparking electrode, substitute original composite nitride boron milling cutter by the contactless processing of electric spark and process firmly; Because the electric spark of discharge generation can be processed any conductive material; It can not receive the influence of workpiece strength and shape, and discharge frequency is also higher, can process high hardness material faster; The cost rising problem that has caused so avoided using composite nitride boron milling cutter, working (machining) efficiency has also obtained significant raising.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the roll of employing high hardness material manufacturing;
The work sketch map of the sparking electrode processing roll of the milling machine that Fig. 2 provides for the embodiment of the invention.
Among above Fig. 1-Fig. 2:
High-hardness roller 1, motor 2, sparking electrode 3, medium conveying apparatus 4, the graphite piece 5 that powers on.
The specific embodiment
The invention provides a kind of milling machine, realized reduction Roller Machining cost, improve the purpose of working (machining) efficiency.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The milling machine that the embodiment of the invention provides is used to process high-hardness roller 1, comprises milling cutter seat and control system, also comprises:
Be arranged on the motor 2 on the milling cutter seat;
Be arranged on the motor 2, with the control system connectivity, can be to the sparking electrode 3 of high-hardness roller 1 discharge with melt-processed high-hardness roller 1, the cross sectional shape of sparking electrode 3 is corresponding with the cross rib groove shape of high-hardness roller 1;
With high-hardness roller 1 insulation, be used for high-hardness roller 1 chuck and the tailstock that high-hardness roller 1 chuck is set of clamping high-hardness roller 1;
Spray the medium conveying apparatus 4 of dielectric to the sparking electrode 3 and the gap of high-hardness roller 1.
The course of work of the milling machine that present embodiment provides is following:
In the milling machine provided by the invention; Milling cutter seat, control system, high-hardness roller 1 chuck and the tailstock of existing screw-thread steel yaw cross rib milling machine are improved respectively; Composite nitride boron milling cutter no longer is installed on the milling cutter seat; But motor 2 and sparking electrode 3 have been installed, and high-hardness roller 1 chuck and tailstock have been done the insulating processing, make when 3 pairs of high-hardness rollers of sparking electrode 1 discharge not can double thread steel yaw cross rib milling machine other parts impact.
Adopt electric spark that high-hardness roller 1 is added man-hour, utilize the pulse power, a utmost point of power supply connects sparking electrode 3; Another utmost point connects high-hardness roller 1, and the two poles of the earth are all immersed in the liquid medium that is sprayed by medium conveying apparatus 4, adds man-hour sparking electrode 3 under the control of control system; All the time (0.01mm～0.05mm), during sparking electrode 3 discharges, electric spark can puncture the liquid medium of two interpolar closest approaches to keep a very little discharging gap with high-hardness roller 1; Form discharge channel; Because the sectional area of discharge channel is very little, and discharge time is extremely short, cause energy height to concentrate (10W/mm～107W/mm); The TRANSIENT HIGH TEMPERATURE that region of discharge produces is enough to make the material fusing even the evaporation of high-hardness roller 1, so that forms a small rut.
After discharge finishes for the first time; Through very short blanking time; Discharge for the second time can take place at another interpolar closest approach again, and so high-frequency circulates down (each second several thousand up to ten thousand times), because the cross sectional shape of sparking electrode 3 is corresponding with the cross sectional shape of screw-thread steel cross rib; So sparking electrode 3 under the control of control system, finally processes the groove of screw-thread steel cross rib on high-hardness roller 1.
Can draw through the above-mentioned course of work; The milling cutter that present embodiment provides changes composite nitride boron milling cutter into sparking electrode 3, substitutes original composite nitride boron milling cutter by the contactless processing of electric spark and processes firmly; Because the electric spark of discharge generation can be processed any conductive material; It can not receive the influence of workpiece strength and shape, and discharge frequency is also higher, can process high hardness material faster; The problem that the cost that has caused so avoided using composite nitride boron milling cutter raises, working (machining) efficiency has also obtained significant raising.
In order further to optimize technique scheme; In the milling machine that present embodiment provides, the control system also comprises medium conveying apparatus 4 start stop switches, motor 2 operating switches, the quick centering rise of milling cutter seat module, timing cutter lifting height and interval control module, timing cutter lifting signal indicating module and fluid pressure detection module.The milling machine that present embodiment provides is that upgrading forms on the basis of screw-thread steel yaw cross rib milling machine; Screw-thread steel yaw cross rib milling machine is that the three-shaft linkage precise numerical control machine adopts lead screw transmission and step motor drive; As shown in Figure 2; The X axle is milling cutter advance and retreat directions, and the Y axle is high-hardness roller 1 direction of rotation; The Z axle is a milling cutter yaw direction; By the GMT-008 of universal numerical control system centralized Control, in the control system, set up the numerical control program of control above-mentioned functions, can realize very easily; Not only reduced the change degree of double thread steel yaw cross rib milling machine; Saved improvement cost, reduced operation easier, made that also the versatility of the technical scheme that present embodiment provides is higher.
Concrete, the control system can feed back to the voltage signal of discharging gap control milling cutter seat major axis X control of position module with control sparking electrode 3 stable dischargings.In the process of transforming screw-thread steel yaw cross rib milling machine; When transforming the control circuit of yaw milling cutter seat, the input link that the voltage signal of discharging gap is transported to the control system is carried out dividing potential drop and integration, imports comparing element again; Compare gap signal voltage and given voltage; Reach the equalization point of control discharge gap voltage, the voltage signal that will be higher or lower than equalization point then becomes the output signal of forward or negative sense, compares and enlarges with the negative-feedback signal of X shaft step motor; The final raising speed rigidity that realizes, the purpose of stable discharging processing.
Further, the power supply that is communicated with sparking electrode 3 and high-hardness roller 1 is compound transistor pulse generator, further, compound transistor pulse generator is the compound transistor pulse generator of JF-108S.The compound transistor pulse generator of JF-108S is the special-purpose assorted power supply of electric spark, power supply input power 10.5KW, and maximum processing electric current 90A, the highest processing throughput was greater than 600mm3/ minute; With processing Φ 12 specification screw-thread steel cross ribs is example, the dark 1.0mm of cross rib, groove width 2.1mm; Top width 0.7mm, maximum secting area 2.4mm2 then accomplishes 4.2mm/s each second; The speed that is equivalent to common roll 1 processing of spheroidal graphite cast-iron, accomplishing a circle groove needs 70 minutes, suitable with composite nitride boron milling cutter; But cheap, can realize harmless processing continuously, and can unmanned.Certainly, under the prerequisite that does not influence the milling cutter operate as normal that present embodiment provides, the power supply that is communicated with sparking electrode 3 and high-hardness roller 1 can also be the power supply of other types.
Preferably, sparking electrode 3 is connected with power supply through the electrode workpiece respectively with high-hardness roller 1.
Concrete, sparking electrode 3 is the red copper electrode.The red copper electrode is as the sparking electrode in the spark machined 3, compares with other electrodes to have remarkable advantage, and for example purity is high; Organize fine and closely wovenly, oxygen content is extremely low, pore-free, trachoma, crackle, impurity; Electric conductivity is better, and the mold surface finish that galvanic corrosion goes out is high, and also more material benefit of price.
Between sparking electrode 3 and motor 2, also be provided with the graphite piece 5 that powers on.The graphite piece 5 that powers on is installed on the motor 2, in along with motor 2 rotations, can realize conduction, for sparking electrode 3 discharges provide essential electric current.
For further mature technology scheme, in the milling machine that present embodiment provides, the power supply of motor 2 is a variable-frequency power sources.The power supply of employing variable-frequency power sources because the frequency of power supply constantly changes, so in the process of its variation, can conveniently adjust the rotary speed of red copper electrode, realizes the electrode uniform loss, guarantees to process fineness.
Concrete, medium conveying apparatus 4 is the high flow rate oil supply pump.The oil feed pump of big flow is because the increase of flow can better be guaranteed liquid level stabilizing, and flushing cinder is smooth.
The specific operation process of the milling machine that present embodiment provides is following:
1, the finished product high-hardness roller 1 that adds the good groove internal diameter of entrucking at first carries out groove is aligned first centerline of groove with sparking electrode 3.Hand feed X axle touches the groove bottom and carries out Zero positioning up to sparking electrode 3;
2, start processing walking program through the control system, open oil feed pump and give the kerosene covering; Start sparking electrode 3 electric rotating machines, select suitable rotary speed; Open the electric spark power supply, begin processing; Whether observe spark stable, whether by kerosene cover, flushing cinder is normal, processing electric current whether along with Z to swing, promptly periodically increase to the centre after, reduce gradually again;
3, process a cross rib groove after, shut down cross rib groove depth, side fineness that observation post processes, reserve technic index such as tip gap size, normal after, begin to carry out the Y direction normal process; The intermediate demand job-hopping of carving characters, whether observe the job-hopping program normal; After accomplishing a week, carry out the program of carving characters that identifies, whether deflection is normal to note observing stroke;
4, accomplish a circle groove fully after, manually withdraw from the X axle, manually shake the translation leading screw, observe the grating chi and align next groove, carry out next circle cross rib groove processing, until whole high-hardness roller 1 of whole completion;
5, observe cross rib sidewall spark machined photochromic layer, whether evenly cover the corner flawless; Whether cutting accumulates the slag bits than the depths.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (9)
1. a milling machine is used to process high-hardness roller (1), comprises the control system that milling cutter seat and control milling machine are worked automatically, it is characterized in that, also comprises:
Be arranged on the motor (2) on the said milling cutter seat;
Be arranged on the said motor (2); Link to each other with said control system; Can be to the sparking electrode (3) of said high-hardness roller (1) discharge with the said high-hardness roller of melt-processed (1), the cross sectional shape of said sparking electrode (3) is corresponding with the cross rib groove shape of said high-hardness roller (1);
With said high-hardness roller (1) insulation, be used for the roll chuck and the tailstock that said roll chuck is set of the said high-hardness roller of clamping (1); With
Spray the medium conveying apparatus (4) of dielectric to the said sparking electrode (3) and the gap of said roll (1).
2. milling machine according to claim 1; It is characterized in that said control system is provided with medium conveying apparatus start stop switch, motor operating switch, the quick centering rise of milling cutter seat module, regularly cutter lifting height and control module, regularly cutter lifting signal indicating module and fluid pressure detection module at interval.
3. milling machine according to claim 2 is characterized in that, said control system can feed back to the voltage signal of discharging gap the said milling cutter seat major axis X control of position module of control to control said sparking electrode stable discharging.
4. milling machine according to claim 1 is characterized in that, the power supply that is communicated with said sparking electrode (3) and roll (1) is compound transistor pulse generator.
5. milling machine according to claim 4 is characterized in that, said sparking electrode (3) and roll (1) are connected with power supply through the electrode workpiece respectively.
6. milling machine according to claim 5 is characterized in that, said sparking electrode (3) is the red copper electrode.
7. milling machine according to claim 1 is characterized in that, also comprise connect said motor (2) and said sparking electrode (3) but the electrically conductive graphite piece (5) that powers on.
8. milling machine according to claim 1 is characterized in that, the power supply of said motor is a variable-frequency power sources.
9. milling machine according to claim 8 is characterized in that, said medium conveying apparatus (4) is the high flow rate oil supply pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138308.3A CN102653021B (en) | 2012-05-07 | 2012-05-07 | Milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138308.3A CN102653021B (en) | 2012-05-07 | 2012-05-07 | Milling machine |
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| Publication Number | Publication Date |
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| CN102653021A true CN102653021A (en) | 2012-09-05 |
| CN102653021B CN102653021B (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210138308.3A Expired - Fee Related CN102653021B (en) | 2012-05-07 | 2012-05-07 | Milling machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105127758A (en) * | 2015-10-15 | 2015-12-09 | 山东理工大学 | Multi-axis combination device for machine tool |
| CN107378153A (en) * | 2017-09-19 | 2017-11-24 | 湖南三泰新材料股份有限公司 | A kind of device, discharge-treating method of screw-thread steel roll transverse rib for being used to process screw-thread steel roll transverse rib |
| CN107470725A (en) * | 2017-10-09 | 2017-12-15 | 湖南三泰新材料股份有限公司 | A kind of compound electrode for being used to process screw-thread steel roll transverse rib |
| CN109128413A (en) * | 2018-07-20 | 2019-01-04 | 电子科技大学 | A kind of electrode clamping mechanism and its method applied to five axis electric machining |
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Cited By (4)
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| CN105127758A (en) * | 2015-10-15 | 2015-12-09 | 山东理工大学 | Multi-axis combination device for machine tool |
| CN107378153A (en) * | 2017-09-19 | 2017-11-24 | 湖南三泰新材料股份有限公司 | A kind of device, discharge-treating method of screw-thread steel roll transverse rib for being used to process screw-thread steel roll transverse rib |
| CN107470725A (en) * | 2017-10-09 | 2017-12-15 | 湖南三泰新材料股份有限公司 | A kind of compound electrode for being used to process screw-thread steel roll transverse rib |
| CN109128413A (en) * | 2018-07-20 | 2019-01-04 | 电子科技大学 | A kind of electrode clamping mechanism and its method applied to five axis electric machining |
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|---|---|
| CN102653021B (en) | 2014-11-19 |
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