CN104190717A - Slag removing device for cold rolling of leveler support roller - Google Patents
Slag removing device for cold rolling of leveler support roller Download PDFInfo
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- CN104190717A CN104190717A CN201410338439.5A CN201410338439A CN104190717A CN 104190717 A CN104190717 A CN 104190717A CN 201410338439 A CN201410338439 A CN 201410338439A CN 104190717 A CN104190717 A CN 104190717A
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- damping roller
- scraping
- roller
- backing roll
- motor
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Abstract
The invention discloses a slag removing device for cold rolling of a leveler support roller. The slag removing device comprises a water scraping roller for scraping out impurities, a micro pneumatic motor for providing power, a power transfer mechanism for transferring power, and a bracket having a cylinder, wherein the two ends of the water scraping roller are mounted on a bearing base premounted on the bracket through bearings; the direction of the water scraping roller is opposite to the rotating direction of the support roller; an air inlet of the cylinder is connected with an air outlet pipe of an air compressor; an extension rod of the cylinder is connected with the bracket; bristles are arranged on the surface of the water scraping roller; and the pneumatic motor is mounted on a motor base of the bracket, and is connected with the water scraping roller through the power transfer mechanism. The slag removing device has the benefits of large reduction of the probability of generating chrome points on the body surfaces of a working roller and the support roller, prevention of abnormal roller replacement due to the defect, prolonging of the service life of the roller, low investment and convenience for mounting, and is suitable for various occasions with high requirement on surface cleanness of the support roller.
Description
Technical field
The present invention relates to a kind of cold-rolling equipment of metallurgical system, especially a kind of deslagging device for Cold-Rolled Strip Temper Mill backing roll.
Background technology
All cold-rolled steel factories are all with smooth (finishing) milling train, this milling train is in heat treatment step Hou road, the chill volume that is mainly used in annealing to complete rolls again, to eliminate the yield point elongation of annealing coil, meet final products user's the mechanical property such as punching press, bending, stretching! Incapability is the backing roll system having on four rollers, six roller planishers as bearing roll-force effect, and in the time producing high-grade plate face, the cleannes on backing roll surface require just quite harsh.When planisher working roll is in the time that smooth annealing volume is surperficial, belt steel surface has part iron powder all the time, iron scale or a small amount of scum drop, the a part of feeder that enters planisher below that washes away by smooth liquid in this part impurity, separately there is a small amount of impurity can be adsorbed in planisher work roll surface and then bring the adjacent roll surface directly contacting with working roll into, in the time that adjacent two rollers compress rotation mutually, this part impurity can be pressed into roll surface with the rotation of roller, leave small rut at body surface, when turn to belt steel surface contact position with small rut roll surface, belt steel surface can produce a small salient point, thereby the surface quality of impact with steel.Along with the working roll increase of service time, this type of defect can build up, belt steel surface can produce increasing chromium point, when serious, toward up machine is only smooth, two or three volumes will be replaced lower machine to working roll, as only change working roll perhaps workload can also bear, but backing roll surface will make workload be multiplied while also there will be corresponding chromium point.The general weight of backing roll is all at tens tons, and a pair of backing roll workload of grinding is huge, and the cycle is long.Working roll generally has five or six covers can have enough to meet the need replacing, but backing roll is because own wt is large, manufacturing cost is high, generally all in a hundred or so ten thousand left and right, so can not there be five or six covers to have enough to meet the need as working roll, general factory is all the using and the reserved, moreover the backing roll replacement cycle is all to determine according to steel transportation amount, generally need to reach to 15000 tons of left and right and just can change.In the time that a large amount of cumulative bad chromium points appears in backing roll surface, can have a strong impact on product quality, cause strip surface quality degradation.
Traditional way is exactly to rinse frame and each roller system with high-pressure water heating at present, adds Wiper blade exactly in addition, to remove this type of impurity at entrance side and the lower outlet side of planisher top backing up roll.But the Wiper blade of current nearly all planisher is following several materials nothing more than: 1, wool felt.2, nylon sheet.3, polyurethane plate.4, the softer rubber slab of other material.Although a few class materials can effectively stop the impurity in the time that planisher is worked above, but because Wiper blade is non-rotatable member, when the smooth liquid measure scraping from backing roll surface when Wiper blade is less or when though the smooth liquid measure scraping goes there is no scouring force greatly, this type of impurity has some can be adsorbed in Wiper blade surface, along with the increase of working time, a little class impurity still can build up on Wiper blade surface, because Wiper blade is direct and backing roll Surface Contact, backing roll surface still can be scratched by this type of impurity, form the light and dark lines of a rule, this lines passes to belt steel surface by working roll again, producing as LED, aluminium strip, when what copper strips used requires the product of belt steel surface roughness below 0.2, can see that from sidelight belt steel surface also there will be light and dark aberration.On the other hand, although Wiper blade material is soft more many than backing roll material, due to long time of contact with backing roll roll surface, and position fixes, and this type of material also can leave cut on backing roll surface.If there is no Wiper blade, nozzle at backing roll and the smooth liquid of working roll contact position increase by one row's spray is used for cleaning the impurity of bringing up from working roll, or can not remove completely, purge and bring great pressure for the band steel at planisher rear simultaneously, the number needs that compressed air purges will be at double increase, the energy consumption of the ton steel that this just increases greatly.
Summary of the invention
For overcome that original Wiper blade exists easy to wear, be prone to Wiper blade and do not clean up impurity effect product quality, reduce the problems such as smooth liquid consumption, the invention provides a kind of deslagging device for Cold-Rolled Strip Temper Mill backing roll that reduces roller consumption and cost, easy maintenance.
Deslagging device for Cold-Rolled Strip Temper Mill backing roll of the present invention, it is characterized in that: comprise for scrape impurity scrape damping roller, for the minitype pneumatic motor of power is provided, for the Poewr transmission mechanism of transferring power with the support of cylinder, the described damping roller two ends of scraping are arranged on the bearing block of pre-installation on support by bearing respectively, and the described direction of scraping damping roller and the direction of rotation of backing roll, the air inlet of described cylinder is connected with the escape pipe pipeline of air compressor machine, and the expansion link of described cylinder is connected with support; Bristle is arranged on the described surface of scraping damping roller; Described air motor is arranged on the motor base of support; Described air motor is connected with the described damping roller of scraping by Poewr transmission mechanism; Described Poewr transmission mechanism comprise for the fixing motor synchronous gear of air motor, for scrape damping roller fixing scrape damping roller synchronous pulley, Timing Belt, described motor synchronous gear is arranged on the output shaft of described air motor, described scrape damping roller synchronous pulley and the described damping roller of scraping is coaxially installed, and described motor synchronous gear and described scraping between damping roller synchronous pulley are connected by Timing Belt.
Further, the described bristle of scraping the setting of damping roller surface is taking roller center as benchmark, and bristle is the symmetrical splayed configuration bispin structure that is.
Or the described bristle of scraping the setting of damping roller surface is the covered with spiral brush structure of left-handed or dextrorotation.
Further, the described damping roller of scraping adopts nylon splayed configuration bristle.
Further, described motor synchronous gear and the described both sides of scraping damping roller synchronous pulley are respectively equipped with belt wheel baffle plate.
Further, be describedly provided with the collection guiding gutter for transporting impurity under scraping damping roller.
Further, the air inlet place of described cylinder is furnished with the pressure regulator valve for regulating admission pressure, and the compressed air air pressure that described air compressor machine provides is 0.6MPa.
The body of roll both sides of further, scraping damping roller are provided with two pass drip ring.
Further, described motor synchronous gear is scraped damping roller synchronous pulley diameter than being 1:1 with described; And described air motor with scrape damping roller and be arranged in parallel.
Further, described bearing adopts and carries sealing shape full-closed structure, and described bearing outside is provided with the axle card mating with bearing; Bolt hole for fixing pneumatic motor base is all elongated hole.
Technical conceive of the present invention: Wiper blade is substituted with the rotary damping roller of scraping, and direction and backing roll direction of rotation, these rotatable parts just can be eliminated because scraping water does not instead rotate the defect of generation, even if contact with backing roll for a long time, also can not produce cut; Scrape damping roller surface and arrange that picture cleans the bristle the brush roll that belt steel surface uses, this bristle is taking roller center as benchmark, and the symmetrical splayed configuration that is is arranged, in the time scraping damping roller rotation, can effectively the impurity that adheres to backing roll surface be removed; Need to rotate on the contrary with the backing roll direction of motion because scraping damping roller, consider position and security between frame, power adopts minitype pneumatic motor, prevent from also can not producing as the electric leakage of motor, the leakage of oil of fluid motor-driven after a large amount of smooth liquid from corroding, avoided the electric leakage of motor to cause the dangerous and oil leaking pollution belt steel surface phenomenon of operation; Below scraping damping roller, increase by a collection guiding gutter, remove the impurity getting off by the whole collections of this feeder and drain in time scraping damping roller, prevent impurity secondary pollution belt steel surface.
Scrape damping roller and adopt nylon splayed configuration bristle, the coefficient of friction on nylon and backing roll surface is: u=0.05--0.1 (having lubrication state), u=0.3--0.5 (unlubricated situation).Have smooth liquid because scraping between damping roller and backing roll, smooth liquid has lubrication, therefore get u=0.1, the reliability of air motor power while getting large value guarantee work.Scrape damping roller and be responsible for compression by a cylinder, guarantee to make to scrape damping roller laminating backing roll.The compressed air air pressure that air compressor machine provides is 0.6MPa, in actual use procedure at cylinder air inlet pressure regulator valve, can be according to actual conditions adjustment.Cylinder piston diameter is 80mm.Therefore can calculate the maximum thrust that cylinder can provide according to formula: F=PS, F=0.6 × π × 40 × 40=3014 (N), can calculate the frictional force between nylon brush hair and backing roll surface according to friction formula f=uN again, f=0.1 × 3014=301.4 (N).In known frictional force situation, just can calculate the required moment of torsion providing of required air motor.According to torque arithmetic formula:
because planisher is scraped damping roller position, space is very limited, so scraping damping roller roller footpath will select according to actual conditions, take charge of actual conditions according to me herein and select that to scrape damping roller diameter be φ=110mm, so show that simulation scrapes the moment of torsion of damping roller and be: T=301.4 × 0.055=16.577NM.According to the suitable minitype pneumatic horse of this data selection as power output source.
The invention has the beneficial effects as follows: 1, reduce in a large number the probability that chromium point appears in working roll, backing roll body surface, avoided the improper roll change that causes because of this type of defect, extended the roller life-span; 2, reduce the grinding number of times of grinding machine to the improper roll change body of roll, saved human and material resources; 3, can effectively reduce the use amount of smooth liquid, use this device after can substitute the smooth nozzle for liquid between working roll and backing roll roll gap; 4, be rotatable parts because scraping damping roller, compared with traditional fixed Wiper blade, wear extent alleviates greatly, has reduced the consumption of consumable accessory; 5, effectively ensure the surface quality of product, reduced the generation of substandard products; 6, this device itself is simple in structure, can specifically adjust barrel length scope according to actual service condition, and small investment is easy for installation, is applicable to all kinds of backing roll surface cleanness being required to high occasion.
Brief description of the drawings
Fig. 1 a is overall structure figure of the present invention.
Fig. 1 b is the axis side view of scraping damping roller of the present invention.
Fig. 1 c is the axle front view of scraping damping roller of the present invention.
Fig. 2 a is the front view of scraping damping roller synchronous pulley of the present invention.
Fig. 2 b is the right view of scraping damping roller synchronous pulley of the present invention.
Fig. 3 a is the front view of motor synchronous gear of the present invention.
Fig. 3 b is the right view of motor synchronous gear of the present invention.
Fig. 4 a is the front view of belt wheel baffle plate of the present invention.
Fig. 4 b is the side view of belt wheel baffle plate of the present invention.
Fig. 5 a is the front view (the axle card in left side) of axle card of the present invention.
Fig. 5 b is the right view (the axle card in left side) of axle card of the present invention.
Fig. 5 c is the front view (the axle card on right side) of axle card of the present invention.
Fig. 5 d is the side view (the axle card on right side) of axle card of the present invention.
Fig. 6 a is the front view of bearing block of the present invention.
Fig. 6 b is the right view of bearing block of the present invention.
Fig. 7 a is one of motor equipment schematic diagram of the present invention.
Fig. 7 b is two of motor equipment schematic diagram of the present invention.
Fig. 8 a is the front view of bearing of the present invention.
Fig. 8 b is the side view of bearing of the present invention.
Fig. 9 a is the front view of motor base of the present invention.
Fig. 9 b is the side view of motor base of the present invention.
Fig. 9 c is the top view of support of the present invention.
Figure 10 a is the front view of scraping damping roller of the present invention.
Figure 10 b is the side view of scraping damping roller of the present invention.
Detailed description of the invention
Further illustrate the present invention below in conjunction with accompanying drawing
With reference to accompanying drawing:
Deslagging device for Cold-Rolled Strip Temper Mill backing roll of the present invention, comprise for scrape impurity scrape damping roller 1, for the minitype pneumatic motor 2 of power is provided, for the Poewr transmission mechanism 3 of transferring power with the support of cylinder, described damping roller 1 two ends of scraping are arranged on the bearing block 4 of pre-installation on support by bearing 5 respectively, and the described direction of scraping damping roller 1 and the direction of rotation of backing roll, the air inlet of described cylinder is connected with the escape pipe pipeline of air compressor machine, and the expansion link of described cylinder is connected with support; Bristle 11 is arranged on the described surface of scraping damping roller 1; Described air motor 2 is arranged on the motor base 21 of support; Described air motor 2 is connected with the described damping roller 1 of scraping by Poewr transmission mechanism 3; Described Poewr transmission mechanism 3 comprise for the fixing motor synchronous gear 31 of air motor, for scrape damping roller fixing scrape damping roller synchronous pulley 32, Timing Belt, described motor synchronous gear 31 is arranged on the output shaft of described air motor, the described damping roller synchronous pulley 32 of scraping is coaxially installed with the described damping roller 1 of scraping, and described motor synchronous gear 31 and described scraping between damping roller synchronous pulley 32 are connected by Timing Belt.
Further, the described bristle 11 of scraping damping roller 1 surface setting is taking roller center as benchmark, and bristle is the symmetrical splayed configuration bispin structure that is.
Or, the covered with spiral brush structure that the described bristle 11 of scraping damping roller 1 surface setting is left-handed or dextrorotation.
Further, the described damping roller 1 of scraping adopts nylon splayed configuration bristle.
Further, described motor synchronous gear 31 and the described both sides of scraping damping roller synchronous pulley 32 are respectively equipped with belt wheel baffle plate 33.
Further, be describedly provided with the collection guiding gutter for transporting impurity under scraping damping roller 1.
Further, the air inlet place of described cylinder is furnished with the pressure regulator valve for regulating admission pressure, and the compressed air air pressure that described air compressor machine provides is 0.6MPa.
Further, the body of roll both sides of scraping damping roller 1 are provided with two pass drip ring 12, and drip ring diameter is φ=50mm, and thickness is 2mm.
Further, described motor synchronous gear 31 is scraped damping roller synchronous pulley 32 diameters than being 1:1 with described; And described air motor 2 with scrape damping roller 1 and be arranged in parallel.
Further, described bearing 5 adopts and carries sealing shape full-closed structure, and described bearing 5 outsides are provided with the axle card 51 mating with bearing; Bolt hole for fixing pneumatic motor base 21 is all elongated hole.
Technical conceive of the present invention: Wiper blade is substituted with the rotary damping roller 1 of scraping, and direction and backing roll direction of rotation, these rotatable parts just can be eliminated because scraping water does not instead rotate the defect of generation, even if contact with backing roll for a long time, also can not produce cut; Scrape damping roller surface and arrange that picture cleans the bristle 11 the brush roll that belt steel surface uses, this bristle 11 is taking roller center as benchmark, and the symmetrical splayed configuration layout that is, in the time scraping damping roller 1 and rotate, can effectively be removed the impurity that adheres to backing roll surface get off; Need to rotate on the contrary with the backing roll direction of motion because scraping damping roller 1, consider position and security between frame, power adopts minitype pneumatic motor 2, prevent from also can not producing as the electric leakage of motor, the leakage of oil of fluid motor-driven after a large amount of smooth liquid from corroding, avoided the electric leakage of motor to cause the dangerous and oil leaking pollution belt steel surface phenomenon of operation; Below scraping damping roller, increase by a collection guiding gutter, remove the impurity getting off by the whole collections of this feeder and drain in time scraping damping roller, prevent impurity secondary pollution belt steel surface.
Scrape damping roller 1 and adopt nylon splayed configuration bristle, the coefficient of friction on nylon and backing roll surface is: u=0.05--0.1 (having lubrication state), u=0.3--0.5 (unlubricated situation).Have smooth liquid because scraping between damping roller and backing roll, smooth liquid has lubrication, therefore get u=0.1, the reliability of air motor power while getting large value guarantee work.Scrape damping roller and be responsible for compression by a cylinder, guarantee to make to scrape damping roller laminating backing roll.The compressed air air pressure that air compressor machine provides is 0.6MPa, in actual use procedure at cylinder air inlet pressure regulator valve, can be according to actual conditions adjustment.Cylinder piston diameter is 80mm.Therefore can calculate the maximum thrust that cylinder can provide according to formula: F=PS, F=0.6 × π × 40 × 40=3014 (N), can calculate the frictional force between nylon brush hair and backing roll surface according to friction formula f=uN again, f=0.1 × 3014=301.4 (N).In known frictional force situation, just can calculate the required moment of torsion providing of required air motor.According to torque arithmetic formula:
because planisher is scraped damping roller position, space is very limited, so scraping damping roller roller footpath will select according to actual conditions, take charge of actual conditions according to me herein and select that to scrape damping roller diameter be φ=110mm, so show that simulation scrapes the moment of torsion of damping roller and be: T=301.4 × 0.055=16.577NM.According to the suitable minitype pneumatic horse of this data selection as power output source.
Content described in this description embodiment is only enumerating of way of realization to inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also comprises that those skilled in the art conceive the equivalent technologies means that can expect according to the present invention.
Claims (10)
1. for the deslagging device of Cold-Rolled Strip Temper Mill backing roll, it is characterized in that: comprise for scrape impurity scrape damping roller, for the minitype pneumatic motor of power is provided, for the Poewr transmission mechanism of transferring power with the support of cylinder, the described damping roller two ends of scraping are arranged on the bearing block of pre-installation on support by bearing respectively, and the described direction of scraping damping roller and the direction of rotation of backing roll, the air inlet of described cylinder is connected with the escape pipe pipeline of air compressor machine, and the expansion link of described cylinder is connected with support; Bristle is arranged on the described surface of scraping damping roller; Described air motor is arranged on the motor base of support; Described air motor is connected with the described damping roller of scraping by Poewr transmission mechanism; Described Poewr transmission mechanism comprise for the fixing motor synchronous gear of air motor, for scrape damping roller fixing scrape damping roller synchronous pulley, Timing Belt, described motor synchronous gear is arranged on the output shaft of described air motor, described scrape damping roller synchronous pulley and the described damping roller of scraping is coaxially installed, and described motor synchronous gear and described scraping between damping roller synchronous pulley are connected by Timing Belt.
2. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 1, is characterized in that: the described bristle of scraping the setting of damping roller surface is taking roller center as benchmark, and bristle is the symmetrical splayed configuration bispin structure that is.
3. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 1, is characterized in that: the described bristle of scraping the setting of damping roller surface is the covered with spiral brush structure of left-handed or dextrorotation.
4. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 2, is characterized in that: the described damping roller of scraping adopts nylon splayed configuration bristle.
5. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 1, is characterized in that: described motor synchronous gear and the described both sides of scraping damping roller synchronous pulley are respectively equipped with belt wheel baffle plate.
6. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 1, is characterized in that: described be provided with the collection guiding gutter for transporting impurity under scraping damping roller.
7. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 1, is characterized in that: the air inlet place of described cylinder is furnished with the pressure regulator valve for regulating admission pressure.
8. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 7, is characterized in that: the body of roll both sides of scraping damping roller are provided with two pass drip ring.
9. the deslagging device for Cold-Rolled Strip Temper Mill backing roll described in claim 1～8 any one claim, is characterized in that: described motor synchronous gear is scraped damping roller synchronous pulley diameter than being 1:1 with described; And described air motor with scrape damping roller and be arranged in parallel.
10. the deslagging device for Cold-Rolled Strip Temper Mill backing roll as claimed in claim 7, is characterized in that: described bearing adopts and carries sealing shape full-closed structure, and described bearing outside is provided with the axle card mating with bearing; Bolt hole for fixing pneumatic motor base is all elongated hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338439.5A CN104190717A (en) | 2014-07-16 | 2014-07-16 | Slag removing device for cold rolling of leveler support roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338439.5A CN104190717A (en) | 2014-07-16 | 2014-07-16 | Slag removing device for cold rolling of leveler support roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104190717A true CN104190717A (en) | 2014-12-10 |
Family
ID=52076164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410338439.5A Pending CN104190717A (en) | 2014-07-16 | 2014-07-16 | Slag removing device for cold rolling of leveler support roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104190717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108772420A (en) * | 2018-04-28 | 2018-11-09 | 浙江联品电子科技有限公司 | A kind of box plate processing milling train of television transmitter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706841A1 (en) * | 1994-10-14 | 1996-04-17 | MANNESMANN Aktiengesellschaft | Method and device for adjusting cleaning rolls for cleaning the rolls in rolling stands |
| CN202006634U (en) * | 2011-04-25 | 2011-10-12 | 福建省晋江市佶龙机械工业有限公司 | Self-cleaning water washing device of rotary screen printing machine |
| CN203091315U (en) * | 2012-12-24 | 2013-07-31 | 浙江业盛新型材料有限公司 | Flushing roller device of temper mill |
| CN203356201U (en) * | 2013-07-29 | 2013-12-25 | 江苏亨特宏业重工有限公司 | Rear brush roll device for cold rolling machine |
| CN203972469U (en) * | 2014-07-16 | 2014-12-03 | 浙江龙盛薄板有限公司 | For the deslagging device of Cold-Rolled Strip Temper Mill backing roll |
-
2014
- 2014-07-16 CN CN201410338439.5A patent/CN104190717A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0706841A1 (en) * | 1994-10-14 | 1996-04-17 | MANNESMANN Aktiengesellschaft | Method and device for adjusting cleaning rolls for cleaning the rolls in rolling stands |
| CN202006634U (en) * | 2011-04-25 | 2011-10-12 | 福建省晋江市佶龙机械工业有限公司 | Self-cleaning water washing device of rotary screen printing machine |
| CN203091315U (en) * | 2012-12-24 | 2013-07-31 | 浙江业盛新型材料有限公司 | Flushing roller device of temper mill |
| CN203356201U (en) * | 2013-07-29 | 2013-12-25 | 江苏亨特宏业重工有限公司 | Rear brush roll device for cold rolling machine |
| CN203972469U (en) * | 2014-07-16 | 2014-12-03 | 浙江龙盛薄板有限公司 | For the deslagging device of Cold-Rolled Strip Temper Mill backing roll |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108772420A (en) * | 2018-04-28 | 2018-11-09 | 浙江联品电子科技有限公司 | A kind of box plate processing milling train of television transmitter |
| CN108772420B (en) * | 2018-04-28 | 2019-11-29 | 浙江联品电子科技有限公司 | Milling train is used in a kind of box plate processing of television transmitter |
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Application publication date: 20141210 |