CN103447819B - A kind of five in one transformer copper belt part treatment facility - Google Patents
A kind of five in one transformer copper belt part treatment facility Download PDFInfo
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- CN103447819B CN103447819B CN201310376884.6A CN201310376884A CN103447819B CN 103447819 B CN103447819 B CN 103447819B CN 201310376884 A CN201310376884 A CN 201310376884A CN 103447819 B CN103447819 B CN 103447819B
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Abstract
The invention discloses a kind of five in one transformer copper belt part treatment facility, be directly installed on ground, turn left from the right side in described ground and the first bracing or strutting arrangement, edge positioner, straightening device, edge rolling device, edge device for scraping, the second bracing or strutting arrangement, edge pressurizing unit, the 3rd bracing or strutting arrangement, edge sanding device are installed successively.The defects such as the wedge angle of copper belt part, burr, flange are removed by the present invention, meanwhile, can also meet the requirement of transformer copper strips to the special shape such as fillet, round edge.
Description
Technical field
The present invention relates to a kind of five in one transformer copper belt part treatment facility, belong to technical field of nonferrous metal processing.
Background technology
Transformer copper strips is mainly used in the coiling of dry type transmitting transformer.In recent years, the volume had due to dry-type transformer is little, lightweight, good insulation preformance, maintenance cost are low etc., and series of advantages is widely used.Along with developing rapidly of dry-type transformer, higher requirement be it is also proposed to transformer copper strips.Particularly impulse-free robustness not only proposed to copper belt part, without wedge angle, without defects such as flange, require to realize edge round edge or round edge simultaneously, puncture insulating barrier to prevent edge burr in use procedure and cause short circuit dischange, guarantee the safe handling of transformer.
Strip side portion process mainly adopts mechanical means or additive method to remove the unnecessary metal of edge, makes it impulse-free robustness, without wedge angle, without defects such as flange.Fairly simple from know-why, but there is larger difficulty for copper strips, as softer in copper strips material, thinner thickness, also requires higher to copper strips template, must ensure that copper belt part is without wave, without arching, without the defect such as tearing.Therefore, transformer copper strip edge is realized without wedge angle, impulse-free robustness, without defects such as flange, making its edge have the shape facility such as round edge, round edge needs to solve a series of technical barrier.
Summary of the invention
The object of the invention there are provided a kind of five in one transformer copper belt part treatment facility, adopt the edge trimming equipment that five unit such as location, leveling, roll extrusion, extruding, frosted effectively combine, the defects such as the wedge angle of copper belt part, burr, flange are removed, meanwhile, the requirement of transformer copper strips to the special shape such as fillet, round edge can also be met.
In order to achieve the above object, technical scheme of the present invention is:
A kind of five in one transformer copper belt part treatment facility, comprise pedestal, described pedestal is turned left from the right side the first bracing or strutting arrangement, edge positioner, straightening device, edge rolling device, edge device for scraping, the second bracing or strutting arrangement, edge pressurizing unit, the 3rd bracing or strutting arrangement, edge sanding device are installed successively.
The first described bracing or strutting arrangement comprises the first bracing or strutting arrangement support; The first described bracing or strutting arrangement support is provided with the first upper backup roll and the first lower backing roll; The parallel below being positioned at the first upper backup roll of the first described lower backing roll, and the first upper backup roll and the installation close to each other of the first lower backing roll; The second described bracing or strutting arrangement comprises the second bracing or strutting arrangement support; The second described bracing or strutting arrangement support is provided with the second upper backup roll and the second lower backing roll; The parallel below being positioned at the second upper backup roll of the second described lower backing roll, and the second upper backup roll and the installation close to each other of the second lower backing roll; The 3rd described bracing or strutting arrangement comprises the 3rd bracing or strutting arrangement support; The 3rd described bracing or strutting arrangement support is provided with the 3rd upper backup roll and the 3rd lower backing roll; The parallel below being positioned at the 3rd upper backup roll of the 3rd described lower backing roll, and the 3rd upper backup roll and the installation close to each other of the 3rd lower backing roll.
Described edge positioner comprises edge positioner support; Described edge positioner support is provided with edge positioner rolling roller; Described edge positioner support is also provided with 4 servo-actuated edger rolls; 4 described servo-actuated edger rolls parallel both sides being positioned at edge positioner rolling roller between two respectively.
Described straightening device is made up of the roller of more than 2 horizontal positioned, and between described roller, mutual dislocation is installed.
Described straightening device is made up of the roller of 17 horizontal positioned, and between described roller, mutual dislocation is installed.
Described rolling device comprises rolling device support; Described rolling device support is provided with rolling device rolling roller and 2 to rolling wheel adjustable up and down; The rolling wheel that described 2 couple is adjustable is up and down installed vertically on the both sides of rolling device rolling roller respectively; Described rolling wheel adjustable up and down comprises rolling wheel and lower rolling wheel; Described lower rolling wheel is positioned at below rolling wheel, and described upper rolling wheel and lower rolling wheel infinite approach are installed.
Described device for scraping comprises device for scraping support; Described device for scraping support is provided with device for scraping rolling roller and Shave tool; Described Shave tool is 2 groups, and symmetry is positioned at the both sides of device for scraping rolling roller respectively; Described Shave tool is square structure Shave tool; Described Shave tool adopts the one in carbide alloy Shave tool or high-speed tool steel Shave tool; Described Shave tool is provided with the curved edge of forward and backward knife face.
Described edge pressurizing unit comprises edge pressurizing unit support; Described edge pressurizing unit support is provided with edge pressurizing unit rolling roller and 2 extruding forming rolls, and described 2 extrude the both sides that forming roll is vertically positioned at edge pressurizing unit rolling roller respectively; Described extruding forming roll is the extruding forming roll with arc groove and opening.
Described edge sanding device comprises edge sanding device support; Described edge sanding device support is provided with the brush roll of edge sanding device rolling roller and 2 different meshes; The brush roll parallel both sides being positioned at edge sanding device rolling roller respectively of 2 described different meshes, and install with edge sanding device rolling roller upper horizontal plane infinite approach.
The brush roll of described different meshes is made up of 50 ~ 100 object polish brushes and 2000 ~ 3000 objects brush roll of weaving cotton cloth.
The invention has the beneficial effects as follows: a kind of five in one transformer copper belt part treatment facility of the present invention, adopt the edge trimming equipment that five unit such as location, leveling, roll extrusion, extruding, frosted effectively combine, the defects such as the wedge angle of copper belt part, burr, flange are removed, meanwhile, the requirement of transformer copper strips to the special shape such as fillet, round edge can also be met.Positioner of the present invention achieves the centering of the equipment parts such as straightening device, edge rolling device, edge device for scraping, bracing or strutting arrangement, edge pressurizing unit, bracing or strutting arrangement, edge sanding device, realizes accuracy of alignment at below 0.3mm; Straightening device is the roller by one group of horizontal positioned, the residual stress of copper strips inside is discharged completely, makes copper strips be in the state of complete level, ensures the template state that copper strips is good; Achieve the unit such as the roll extrusion of transformer copper strip edge, scraping, extruding, frosted effectively to work; Rolling device carries out roll extrusion by the rolling wheel that about a pair perpendicular to copper belt part is adjustable to the copper belt part after shearing, eliminates and cuts burr, wedge angle, flange, realize its edge chamfering; Device for scraping is provided with Shave tool at copper strips two edge horizontal level, when the copper belt part of motion is by Shave tool, relies on the motion of copper strips to realize copper belt part scraping process, type scraping knife; Tool can adjust arbitrarily according to the width of copper strips; Device for scraping carries out to copper belt part continuity, the uniformity that scraping process can ensure copper belt part process, prevents copper belt part arching, wave, tears; By the process of device for scraping, make copper belt part reach without defects such as wedge angle, burr, flange, further it achieves copper strips round edge or round edge etc.; Edge pressurizing unit is by a pair servo-actuated extruding forming roll with arc groove and opening, to eliminate the chamfering wedge angle formed when roll extrusion scraping copper belt part, repairs its shape and accurately controls copper strips width, and carrying out rounding off to chamfering; Edge sanding device adopts the brush roll of different meshes to remove wedge angle, the burr of copper belt part remnants, realizes the smooth tool of copper belt part.There is following superiority:
1. present invention achieves the transformer copper strip impulse-free robustness of different size, without wedge angle, without defects such as flange, also achieve the requirement of copper belt part round edge or round edge simultaneously.
2. the present invention have reasonable in design, structure is simple, easy to operate, be easy to safeguard feature.
Accompanying drawing explanation
Fig. 1 is the structural representation of five in one transformer copper belt part treatment facility of the present invention;
Fig. 2 is the top view of this Fig. 1.
Detailed description of the invention
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of five in one transformer copper belt part treatment facility, comprise pedestal, described pedestal is turned left from the right side the first bracing or strutting arrangement 1, edge positioner 2, straightening device 3, edge rolling device 4, edge device for scraping 5, second bracing or strutting arrangement 6, edge pressurizing unit 7, the 3rd bracing or strutting arrangement 8, edge sanding device 9 are installed successively.The first described bracing or strutting arrangement 1 comprises the first bracing or strutting arrangement support 10; The first described bracing or strutting arrangement support 10 is provided with the first upper backup roll 11 and the first lower backing roll 12; The parallel below being positioned at the first upper backup roll 11 of the first described lower backing roll 12, and the first upper backup roll 11 and the installation close to each other of the first lower backing roll 12; The second described bracing or strutting arrangement 6 comprises the second bracing or strutting arrangement support 13; The second described bracing or strutting arrangement support 13 is provided with the second upper backup roll 14 and the second lower backing roll 15; The parallel below being positioned at the second upper backup roll 14 of the second described lower backing roll 15, and the second upper backup roll 14 and the installation close to each other of the second lower backing roll 15; The 3rd described bracing or strutting arrangement 8 comprises the 3rd bracing or strutting arrangement support 16; The 3rd described bracing or strutting arrangement support 16 is provided with the 3rd upper backup roll 17 and the 3rd lower backing roll 18; The parallel below being positioned at the 3rd upper backup roll 17 of the 3rd described lower backing roll 18, and the 3rd upper backup roll 17 and the installation close to each other of the 3rd lower backing roll 18.The effect of described bracing or strutting arrangement 1, bracing or strutting arrangement 6, bracing or strutting arrangement 8 is relied on by the support of other unit smoothly copper strips, ensures the operation of copper strips at each unit.Described edge positioner 2 comprises edge positioner support 19; Described edge positioner support 19 is provided with edge positioner rolling roller 20; Described edge positioner support 19 is also provided with 4 servo-actuated edger rolls 21; Described 4 servo-actuated edger rolls 21 parallel both sides being positioned at edge positioner rolling roller 20 between two respectively, can according to the servo-actuated edger roll 21 of width different adjustment 4 of copper strips, achieve the centering of copper strips and the location of edge, and according to the relative position of Shave tool and edger roll, guarantee the depth of cut of Shave tool.Meanwhile, positioner 2 achieves the centering of the equipment parts such as straightening device 3, edge rolling device 4, edge device for scraping 5, bracing or strutting arrangement 6, edge pressurizing unit 7, bracing or strutting arrangement 8, edge sanding device 9, realizes accuracy of alignment at below 0.3mm.Described straightening device 3 is made up of the roller 35 of 17 horizontal positioned, and mutual dislocation installation between two between described roller 35.The effect of described straightening device 3 is the rollers by organizing horizontal positioned more, the residual stress of copper strips inside is discharged completely, makes copper strips be in the state of complete level, ensures the template state that copper strips is good; Achieve the unit such as the roll extrusion of transformer copper strip edge, scraping, extruding, frosted effectively to work.Described rolling device 4 comprises rolling device support 22; Described rolling device support 22 is provided with rolling device rolling roller 23 and 2 to rolling wheel adjustable up and down; The rolling wheel that described 2 couple is adjustable is up and down installed vertically on the both sides of rolling device rolling roller 23 respectively; Described rolling wheel adjustable up and down comprises rolling wheel 24 and lower rolling wheel 25; Described lower rolling wheel 25 is positioned at below rolling wheel 24, and described upper rolling wheel 24 is installed with lower rolling wheel 25 infinite approach.According to the width different adjustment of copper strips perpendicular to about a pair of copper belt part adjustable rolling wheel, roll extrusion can be carried out to the copper belt part after shearing, eliminates and cut burr, wedge angle, flange, realize its edge chamfering.Described device for scraping 5 comprises device for scraping support 26; Described device for scraping support 26 is provided with device for scraping rolling roller 27 and Shave tool 28; Described Shave tool 28 is 2 groups, and symmetry is positioned at the both sides of device for scraping rolling roller 27 respectively; Described Shave tool 28 is square structure Shave tool; Described Shave tool 28 adopts the one in carbide alloy Shave tool or high-speed tool steel Shave tool; Described Shave tool 28 is provided with the curved edge of forward and backward knife face.Shave tool can adjust arbitrarily according to the width of copper strips, can, according to the width different adjustment Shave tool 28 of copper strips, make it rely on the motion of copper strips to realize copper belt part scraping process.Device for scraping 5 pairs of copper belt parts carry out continuity, the uniformity that scraping process can ensure copper belt part process, prevent copper belt part arching, wave, tear.By the process of device for scraping 5, make copper belt part reach without defects such as wedge angle, burr, flange, further it achieves copper strips round edge or round edge etc.; Described edge pressurizing unit 7 comprises edge pressurizing unit support 29; Described edge pressurizing unit support 29 is provided with edge pressurizing unit rolling roller 30 and 2 extruding forming rolls 31, and described 2 extrude the both sides that forming roll 31 is vertically positioned at edge pressurizing unit rolling roller 30 respectively; Described extruding forming roll 31 is the extruding forming roll with arc groove and opening.Described edge pressurizing unit 7 is by a pair servo-actuated extruding forming roll with arc groove and opening, to eliminate the chamfering wedge angle formed when roll extrusion scraping copper belt part, repairs its shape and accurately controls copper strips width, and carrying out rounding off to chamfering.Described edge sanding device 9 comprises edge sanding device support 32; Described edge sanding device support 32 is provided with the brush roll 34 of edge sanding device rolling roller 33 and 2 different meshes; The brush roll 34 parallel both sides being positioned at edge sanding device rolling roller 33 respectively of 2 described different meshes, and install with edge sanding device rolling roller 33 upper horizontal plane infinite approach.The brush roll 34 of described different meshes is made up of 50 ~ 100 object polish brushes and 2000 ~ 3000 objects brush roll of weaving cotton cloth.Described edge sanding device 9 adopts the brush roll 34 of different meshes to remove wedge angle, the burr of copper belt part remnants, realizes the smooth of copper belt part.
By the copper strips through cutting device by carrying out tension adjustment between the first upper backup roll 11 of the first bracing or strutting arrangement 1 and the first lower backing roll 12, realizing copper strips tensioning, preventing copper strips from trembleing; Again by the edge positioner rolling roller 20 by edge positioner 2, adjust the position of 4 servo-actuated edger rolls 21, servo-actuated edger roll 21 is contacted with copper belt part, realize centering and the copper belt part location of copper strips, accuracy of alignment is below 0.3mm, ensure that the normal operation of subsequent cell.Copper strips after positioner 2 centering enters straightening device 3, and the residual stress of copper strips inside discharges by 17 rollers 35 successively through straightening device 3 completely, makes copper strips have good template.Copper strips after template process enters edge rolling device 4, by the rolling device rolling roller 23 and 2 of edge rolling device 4, to the copper belt part after shearing, roll extrusion is carried out to rolling wheel adjustable up and down, burr, wedge angle, flange are cut in elimination, realize its edge chamfering.After rolling device 4, copper strips enters device for scraping 5, when the copper belt part of motion is by Shave tool 28, the high-speed motion of copper strips is relied on to realize copper belt part scraping process, Shave tool 28 can regulate arbitrarily according to the width of copper strips, continuity, the uniformity that scraping process can ensure copper belt part process is carried out to copper belt part, prevents copper belt part arching, wave, tear.By the process of device for scraping 5, make copper belt part reach without defects such as wedge angle, burr, flange, further it achieves copper strips round edge or round edge etc.Shave tool 28 can be square structure, and cutter material can be carbide alloy or high-speed tool steel, and every upper processing is provided with the curved edge of forward and backward knife face, can realize the requirement that copper belt part is the special shape such as round edge, round edge after scraping.Copper strips after scraping enters edge pressurizing unit 7, by a pair servo-actuated extruding forming roll 31 with arc groove and opening, to eliminate the chamfering wedge angle formed when roll extrusion scraping copper belt part, repair its shape and accurately control copper strips width, and rounding off is carried out to chamfering.Finally, the copper strips after edge extruding enters edge sanding device 9, and wedge angle, the burr of the brush roll removal copper belt part remnants that weaved cotton cloth by 50 ~ 100 object polish brushes and 2000 ~ 3000 objects, realize the smooth of copper belt part.
A kind of five in one transformer copper belt part treatment facility of the present embodiment, adopt the edge trimming equipment that five unit such as location, leveling, roll extrusion, extruding, frosted effectively combine, the defects such as the wedge angle of copper belt part, burr, flange are removed, meanwhile, the requirement of transformer copper strips to the special shape such as fillet, round edge can also be met.The positioner of the present embodiment achieves the centering of the equipment parts such as straightening device, edge rolling device, edge device for scraping, bracing or strutting arrangement, edge pressurizing unit, bracing or strutting arrangement, edge sanding device, realizes accuracy of alignment at below 0.3mm; Straightening device is the roller by one group of horizontal positioned, the residual stress of copper strips inside is discharged completely, makes copper strips be in the state of complete level, ensures the template state that copper strips is good; Achieve the unit such as the roll extrusion of transformer copper strip edge, scraping, extruding, frosted effectively to work; Rolling device carries out roll extrusion by the rolling wheel that about a pair perpendicular to copper belt part is adjustable to the copper belt part after shearing, eliminates and cuts burr, wedge angle, flange, realize its edge chamfering; Device for scraping is provided with Shave tool at copper strips two edge horizontal level, when the copper belt part of motion is by Shave tool, relies on the motion of copper strips to realize copper belt part scraping process, type scraping knife; Tool can adjust arbitrarily according to the width of copper strips; Device for scraping carries out to copper belt part continuity, the uniformity that scraping process can ensure copper belt part process, prevents copper belt part arching, wave, tears; By the process of device for scraping, make copper belt part reach without defects such as wedge angle, burr, flange, further it achieves copper strips round edge or round edge etc.; Edge pressurizing unit is by a pair servo-actuated extruding forming roll with arc groove and opening, to eliminate the chamfering wedge angle formed when roll extrusion scraping copper belt part, repairs its shape and accurately controls copper strips width, and carrying out rounding off to chamfering; Edge sanding device adopts the brush roll of different meshes to remove wedge angle, the burr of copper belt part remnants, realizes the smooth tool of copper belt part.There is following superiority:
1. the present embodiment achieve different size transformer copper strip impulse-free robustness, without wedge angle, without defects such as flange, also achieve the requirement of copper belt part round edge or round edge simultaneously.
2. the present embodiment have reasonable in design, structure is simple, easy to operate, be easy to safeguard feature.
Claims (8)
1. a five in one transformer copper belt part treatment facility, it is characterized in that: comprise pedestal, described pedestal is turned left from the right side the first bracing or strutting arrangement (1), edge positioner (2), straightening device (3), edge rolling device (4), edge device for scraping (5), the second bracing or strutting arrangement (6), edge pressurizing unit (7), the 3rd bracing or strutting arrangement (8), edge sanding device (9) are installed successively;
Described the first bracing or strutting arrangement (1) comprises the first bracing or strutting arrangement support (10); The first described bracing or strutting arrangement support (10) is provided with the first upper backup roll (11) and the first lower backing roll (12); The described parallel below being positioned at the first upper backup roll (11) of the first lower backing roll (12), and the first upper backup roll (11) and the first lower backing roll (12) installation close to each other; Described the second bracing or strutting arrangement (6) comprises the second bracing or strutting arrangement support (13); The second described bracing or strutting arrangement support (13) is provided with the second upper backup roll (14) and the second lower backing roll (15); The described parallel below being positioned at the second upper backup roll (14) of the second lower backing roll (15), and the second upper backup roll (14) and the second lower backing roll (15) installation close to each other; The 3rd described bracing or strutting arrangement (8) comprises the 3rd bracing or strutting arrangement support (16); The 3rd described bracing or strutting arrangement support (16) is provided with the 3rd upper backup roll (17) and the 3rd lower backing roll (18); The parallel below being positioned at the 3rd upper backup roll (17) of the 3rd described lower backing roll (18), and the 3rd upper backup roll (17) and the 3rd lower backing roll (18) installation close to each other;
Described edge positioner (2) comprises edge positioner support (19); Described edge positioner support (19) is provided with edge positioner rolling roller (20); Described edge positioner support (19) is also provided with 4 servo-actuated edger rolls (21); 4 described servo-actuated edger rolls (21) parallel both sides being positioned at edge positioner rolling roller (20) between two respectively.
2. a kind of five in one transformer copper belt part treatment facility according to claim 1, it is characterized in that: described straightening device (3) is made up of the roller (35) of more than 2 horizontal positioned, and mutual dislocation installation between two between described roller (35).
3. a kind of five in one transformer copper belt part treatment facility according to claim 2, it is characterized in that: described straightening device (3) is made up of the roller (35) of 17 horizontal positioned, and mutual dislocation installation between two between described roller (35).
4. a kind of five in one transformer copper belt part treatment facility according to claim 1, is characterized in that: described rolling device (4) comprises rolling device support (22); Described rolling device support (22) is provided with rolling device rolling roller (23) and 2 to rolling wheel adjustable up and down; The rolling wheel that described 2 couple is adjustable is up and down installed vertically on the both sides of rolling device rolling roller (23) respectively; Described rolling wheel adjustable up and down comprises rolling wheel (24) and lower rolling wheel (25); Described lower rolling wheel (25) is positioned at rolling wheel (24) below, and described upper rolling wheel (24) and lower rolling wheel (25) infinite approach are installed.
5. a kind of five in one transformer copper belt part treatment facility according to claim 1, is characterized in that: described device for scraping (5) comprises device for scraping support (26); Described device for scraping support (26) is provided with device for scraping rolling roller (27) and Shave tool (28); Described Shave tool (28) is 2 groups, and symmetry is positioned at the both sides of device for scraping rolling roller (27) respectively; Described Shave tool (28) is square structure Shave tool; Described Shave tool (28) adopts the one in carbide alloy Shave tool or high-speed tool steel Shave tool; Described Shave tool (28) is provided with the curved edge of forward and backward knife face.
6. a kind of five in one transformer copper belt part treatment facility according to claim 1, is characterized in that: described edge pressurizing unit (7) comprises edge pressurizing unit support (29); Described edge pressurizing unit support (29) is provided with edge pressurizing unit rolling roller (30) and 2 extruding forming roll (31), and described 2 extrude the both sides that forming roll (31) is vertically positioned at edge pressurizing unit rolling roller (30) respectively; Described extruding forming roll (31) is the extruding forming roll with arc groove and opening.
7. a kind of five in one transformer copper belt part treatment facility according to claim 1, is characterized in that: described edge sanding device (9) comprises edge sanding device support (32); Described edge sanding device support (32) is provided with the brush roll (34) of edge sanding device rolling roller (33) and 2 different meshes; Brush roll (34) the parallel both sides being positioned at edge sanding device rolling roller (33) respectively of 2 described different meshes, and install with edge sanding device rolling roller (33) upper horizontal plane infinite approach.
8. a kind of five in one transformer copper belt part treatment facility according to claim 7, is characterized in that: the brush roll (34) of described different meshes is made up of 50 ~ 100 object polish brushes and 2000 ~ 3000 objects brush roll of weaving cotton cloth.
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| CN201310376884.6A CN103447819B (en) | 2013-08-27 | 2013-08-27 | A kind of five in one transformer copper belt part treatment facility |
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| CN201310376884.6A CN103447819B (en) | 2013-08-27 | 2013-08-27 | A kind of five in one transformer copper belt part treatment facility |
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| CN103447819B true CN103447819B (en) | 2016-03-02 |
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| CN105500005B (en) * | 2015-11-26 | 2017-11-21 | 浙江华顺金属材料有限公司 | A kind of stainless steel band rounding side deburring dual-purpose apparatus |
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| CN110280625A (en) * | 2019-06-19 | 2019-09-27 | 冀中能源井陉矿业集团元氏矿业有限公司 | A kind of plane face flange automatic shaping molding machine |
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Address after: 312000 Keqiao District, Shaoxing City, Zhejiang, Lishui Town, Libo Industrial Park Patentee after: Zhejiang Libo industrial Limited by Share Ltd Address before: 312000 Shaoxing County, Zhejiang, Shaoxing Province Ping Town, Li Bo Industrial Park, Shaoxing City Po Bo Electric Co., Ltd. Patentee before: Shaoxing Libo Electric Co., Ltd. |