CN110369849B - Cold rolling production line removes welding slag equipment - Google Patents
Cold rolling production line removes welding slag equipment Download PDFInfo
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- CN110369849B CN110369849B CN201910091362.9A CN201910091362A CN110369849B CN 110369849 B CN110369849 B CN 110369849B CN 201910091362 A CN201910091362 A CN 201910091362A CN 110369849 B CN110369849 B CN 110369849B
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- brush roller
- production line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/04—Flash butt welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/04—Flash butt welding
- B23K11/046—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses welding slag removing equipment for a cold rolling production line, which comprises a movable bracket, wherein an upper brush roller mechanism and a lower brush roller mechanism are respectively arranged on the upper side and the lower side of the movable bracket; the upper brush roll mechanism comprises an upper base, an upper driving device, an upper brush roll and an upper swinging device, and the lower brush roll mechanism comprises a lower base, a lower driving device, a lower brush roll and a lower swinging device; the middle parts of the upper base and the lower base are respectively hinged to the movable support through a swinging shaft, the upper brush roller and the lower brush roller are respectively installed at one ends of the upper base and the lower base, the upper driving device and the lower driving device are respectively installed on the upper base and the lower base and respectively connected and driven to synchronously reversely rotate the upper brush roller and the lower brush roller, and the upper swinging device and the lower swinging device are respectively installed on the movable support and respectively connected and driven to the other ends of the upper base and the lower base. The design can brush and sweep slag on the upper surface and the lower surface of the welding line simultaneously, and has convenient use and high working efficiency.
Description
Technical Field
The invention relates to welding slag removing equipment, in particular to welding slag removing equipment capable of effectively removing welding slag generated by welding of a flash welding machine of a cold rolling production line.
Background
The cold-rolled sheet is a short for common carbon structural steel cold-rolled sheet, also called cold-rolled sheet. The cold-rolled sheet strip has good surface quality, high dimensional accuracy and wide application range, such as automobile manufacturing, electrical products, rolling stock and the like. The cold rolling production line uses hot rolled steel coil as raw material, and then carries out cold continuous rolling after the oxide skin is removed by acid washing, and the finished product is rolled hard coil. Cold rolling is rolling at normal temperature, the strength and hardness of a rolled and hard coil are increased and the toughness and plasticity index is reduced due to cold work hardening caused by continuous cold deformation, the stamping performance is deteriorated, and the cold and hard coil can only be used for parts which are simply deformed, namely cold and hard plates, and the cold and hard plates can recover the mechanical properties after annealing, so the rolled and hard coil produced by a cold rolling production line is basically used as a raw material of a hot galvanizing production line or a continuous annealing production line.
In recent years, as the requirements of automobile manufacturing factories on the surface quality of steel plates are continuously improved, the requirements of galvanization and continuous annealing production lines on the quality of PL-TCM acid rolling production lines are also continuously improved. The flash welder at the inlet of the acid rolling production line is used for electrifying the front and rear coiled steel plates through the welder electrode, and performing spark discharge at the welding opening of the steel plates to melt the steel plates for welding, wherein the welding steps are as follows: (1) the method comprises the steps of centering the width center of the front and rear coil head and tail steel plates, cutting and leveling the front and rear coil head and tail steel plates, centering the thickness center of the front and rear coil head and tail steel plates, electrifying the steel plates, approaching the front and rear coil head and tail steel plates, discharging and melting when approaching, upsetting and extruding the front and rear steel plates, welding the front and rear coil steel plates, and removing extruded welding seam welding slag by a scraper. And (5) generating a large amount of spattering welding slag when the front and rear coiling head and tail steel plates are discharged and melted, and adhering the spattering welding slag to the two sides of the welding seam within the range of 100 mm. When the step (7) is carried out, the scraper is used for removing and leveling welding slag with the width of the welding line being less than 10mm, the flash welding machine is used in the cold rolling production line, and because the welding is extremely severe in splashing, a plurality of welding slag generated in the welding line and the 100mm on the two sides of the welding line can be adhered to the roller surface of the production line along with the entering of the welding line, so that serious quality hidden troubles such as pressing the welding slag into a steel plate or roller mark and the like are caused for products of the acid rolling production line, and even rolling rollers are directly damaged in the rolling process, so that the roller mark is caused. In the prior art, when a steel plate runs, a brush roll with a length slightly larger than the width of the steel plate is attached to the steel plate at the position of a No. 1 tension roll of a production line, and the welding seam is cleaned when the welding seam passes through. The cleaning mode can only clean the upper surface of the welding line, but can not clean the lower surface of the welding line, and can not effectively remove welding slag adhered on the upper surface tightly. Some production lines such as Japan can clean welding seams in advance by using tools such as a mop on a welding seam inspection table, but only has little improvement effect on removing welding slag, and can not greatly improve the cleaning effect of the welding slag, and through the production line test, the cleaning mode can only clean 90% of the welding slag of the welding seams.
The existing cleaning technology for welding slag is to install a brush roller driven by a motor at a fixed position of a production line along the length direction of a welding line, the length of the brush roller is slightly wider than that of a steel plate, the brush roller is pressed on the upper surface of the steel plate, and the welding line is brushed and scanned when the welding line passes. The prior art has the defects that: only the welding slag on the upper surface of the welding seam can be cleaned, and the lower surface of the welding seam cannot be cleaned; the cleaning brush roller uses a 380V three-phase motor, working current is within 20A when the welding line is brushed, welding slag appears in the range of 100mm before and after the welding line, the time for passing through the No. 1 cleaning brush roller is short when the cleaning brush roller runs, and the effective working time is about 0.2 seconds. The brush roller has less effective work for cleaning welding slag and poor effect; the brushing direction of the cleaning brush roller is unchanged relative to the width direction of the steel plate, the abrasion positions of the brush roller for producing the wide steel plate and the narrow steel plate are different, the abrasion speed of the middle position of the brush roller is high, and a cleaning blind area is formed in the middle position of the wide welding line; the brushing and sweeping falling objects are collected in the production line, and the hidden danger of product defects caused by secondary falling can be generated.
As known from the background art, the existing cleaning technology for welding slag is to install a brush roller driven by a motor at a fixed position of a production line along the length direction of a welding line, the length of the brush roller is slightly wider than that of a steel plate, the brush roller is pressed on the upper surface of the steel plate, and the welding line is brushed and scanned when the welding line passes; the technical defects are that: 1. only the welding slag on the upper surface of the welding seam can be cleaned, and the lower surface of the welding seam cannot be cleaned; 2. the cleaning brush roller uses a 380V three-phase motor, working current is within 20A when the welding line is brushed, welding slag appears in the range of 100mm before and after the welding line, the time for passing through the No. 1 cleaning brush roller is short when the cleaning brush roller runs, and the effective working time is about 0.2 seconds. The brush roller has less effective work for cleaning welding slag and poor effect; 3. the brushing direction of the cleaning brush roller is unchanged relative to the width direction of the steel plate, the abrasion positions of the brush roller for producing the wide steel plate and the narrow steel plate are different, the abrasion speed of the middle position of the brush roller is high, and a cleaning blind area is formed in the middle position of the wide welding line; 4. the brushing and sweeping falling objects are collected in the production line, and the hidden danger of product defects caused by secondary falling can be generated.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides novel welding slag removing equipment capable of effectively removing welding slag generated by welding of a flash welding machine of a cold rolling production line, and the upper surface and the lower surface of a welding line are cleaned at the same time, so that the clearance rate of the welding slag can reach more than 99%.
The technical scheme adopted for solving the technical problems is as follows: the welding slag removing device for the cold rolling production line comprises a movable bracket, wherein an upper brush roller mechanism and a lower brush roller mechanism are respectively arranged on the upper side and the lower side of the movable bracket; the upper brush roll mechanism comprises an upper base, an upper driving device, an upper brush roll and an upper swinging device, and the lower brush roll mechanism comprises a lower base, a lower driving device, a lower brush roll and a lower swinging device; the middle parts of the upper base and the lower base are respectively hinged on the movable support through a swinging shaft, the upper brush roller and the lower brush roller are respectively arranged at one ends of the upper base and the lower base, the upper driving device and the lower driving device are respectively arranged on the upper base and the lower base and respectively connected and driven to synchronously and reversely rotate, and the upper swinging device and the lower swinging device are respectively arranged on the movable support and respectively connected and driven to the other ends of the upper base and the lower base, so that the upper base and the lower base can swing/rotate around the hinging point of the swinging shaft; during operation, the upper swinging device and the lower swinging device are respectively connected and driven to swing the upper base and the lower base, so that the upper brush roller and the lower brush roller are close to a workpiece, the welding part of the workpiece is brushed and deslagged, after deslagging is finished, the upper swinging device and the lower swinging device are respectively connected and driven to swing the upper base and the lower base, and the upper brush roller and the lower brush roller are far away from the workpiece.
Further, the upper driving device and the lower driving device adopt a belt transmission mechanism or a motor transmission mechanism.
Further, the upper swinging device and the lower swinging device adopt an air cylinder or a hydraulic cylinder.
Further, the movable support is also provided with a stop block for limiting the swing angles of the upper base and the lower base respectively, the stop block is arranged on the movable support through an adjusting plate, the adjusting plate is connected with the movable support through a screw, and the adjusting plate is provided with a long hole capable of adjusting the installation position; the pressing/up amount of the brush roller when the upper/lower brush roller is put into brushing is limited by changing the position of the adjusting plate, so that the horizontal tangent line height and the horizontal line weight of the production line steel plate are ensured when the upper/lower brush roller is put into brushing. As a further development of the solution, the stop can also be mounted in an adjustable position by means of a screw connection or can be replaced by a wedge assembly.
Further, the movable support is in a C shape, namely, a hollow groove capable of accommodating a workpiece (steel plate) is formed between the upper brush roll mechanism and the lower brush roll mechanism.
The device further comprises a fixed rack, wherein a guide rail is arranged on the fixed rack, and the movable bracket is arranged on the guide rail through a sliding seat; and a hydraulic cylinder or an air cylinder or other screw driving mechanisms for driving the movable support to slide along the guide rail are also arranged on the fixed frame.
Further, the dust collecting device comprises a dust collecting box, a dust collecting fan and a dust filter, wherein the dust collecting fan and the dust filter are arranged on the dust collecting box, and the dust collecting box is arranged on the movable support. The dust collecting fan sucks the dust and other foreign matters generated by brushing the welding line into the dust filter, finally the dust falls into the dust collecting box, and the dust collecting mechanism is arranged on the movable frame and moves along with the movable frame, so that the deslagging effect is ensured.
The beneficial effects of the invention are as follows:
1. the C-shaped frame structure is adopted, and the upper surface and the lower surface of the welding line can be simultaneously brushed and cleaned of slag by arranging 2 upper and lower brush rolls;
2. the upper brush roller and the lower brush roller are perpendicular to the length direction of the welding seam, and can brush and sweep the welding seam and/or 125mm range before and after the welding seam;
3. when the upper brush roller and the lower brush roller brush the welding seam, the welding seam can be brushed and scanned in 7 seconds by driving the movable bracket to move along the length direction of the welding seam, and the brushing efficiency is high;
4. the upper brush roller and the lower brush roller respectively use a belt mechanism driven by a 380V three-phase motor as driving, working current is more than 25A when brushing and sweeping welding lines, effective working time is 7 seconds, and effective brushing and sweeping working are large;
5. the brush roll abrasion compensation adjustment mechanism is provided with an adjustment plate, and the brush roll abrasion compensation mechanism can adjust and compensate to obtain a proper brush roll input position when the brush roll is abraded;
6. the self-adaptive welding seam width function is realized, and the brush roller is even in wear;
7. the welding slag brushing and collecting system is arranged, the collecting system is not arranged in the production line, and the hidden danger of secondary falling is avoided.
Drawings
FIG. 1 is a perspective view of the overall structure of the present invention;
FIG. 2 is a perspective view of the structure of the movable support and the upper and lower brushroll mechanisms of the present invention;
FIG. 3 is a perspective view showing the structure of the dust collecting apparatus of the present invention;
FIG. 4 is a perspective view of a fixing bracket according to the present invention;
fig. 5 is a structural perspective view of a fixing bracket according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. Wherein, the description of the azimuth is taken as a reference standard in fig. 1.
As shown in fig. 1 to 5, a cold rolling production line slag removing apparatus includes a movable bracket 2, and a hydraulic system, a pneumatic system, an electric system, etc., wherein upper and lower sides of the movable bracket 2 are respectively provided with an upper brush roller mechanism 31 and a lower brush roller mechanism 32; the upper brush roll mechanism 31 comprises an upper base 311, an upper driving device 312, an upper brush roll 313 and an upper swinging device 314, the lower brush roll mechanism 32 comprises a lower base 321, a lower driving device 322, a lower brush roll 323 and a lower swinging device 324, the brush roll diameter of the upper brush roll 313 and the brush roll diameter of the lower brush roll 323 are 250mm, the length of the brush roll is 250mm, the single weight of the brush roll is about 70 kg, and the brush roll rotating speed is 1000-2500 r/min and can be adjusted; the middle parts of the upper base 311 and the lower base 321 are respectively hinged on the movable bracket 2 through a swinging shaft 30, the upper brush roller 313 and the lower brush roller 323 are respectively arranged at one ends of the upper base 311 and the lower base 321, the upper driving device 312 and the lower driving device 322 are respectively arranged on the upper base 311 and the lower base 321 and respectively connected and driven to synchronously rotate reversely, the upper swinging device 314 and the lower swinging device 324 are respectively arranged on the movable bracket 2 and respectively connected and driven to the other ends of the upper base 311 and the lower base 321, so that the upper base 311 and the lower base 321 can swing/rotate around the hinging point of the swinging shaft 30, the upper brush roller 313 and the lower brush roller 323 are opened upwards and put downwards, the upper and lower 100mm height difference is realized when the upper brush roller 313 and the lower brush roller 323 swing, when the brush roller put into operation, the upper and lower horizontal tangent line height coincides with the upper and lower horizontal line of the steel plate of the production line by about 2mm, wherein, when in a working state, the horizontal projection position of the upper brush roller 313 and the lower brush roller 323 on a workpiece is 5-10 mm (in the embodiment illustration, the lower brush roller 323 extends about 6mm longer than the upper brush roller 313), and the setting of deviation is not easy to cause the workpiece to generate a clamping state in the deslagging process, thereby influencing normal production.
Further, the upper driving device 312 and the lower driving device 322 adopt a belt transmission mechanism, the driving motor power 22KW of the belt transmission mechanism drives the brush roller to rotate, and the transmission ratio is 1:1.8, the rotating speed can be adjusted in 1000-2500 rpm through electric control, and a motor transmission mechanism matched with a reduction gearbox can also be adopted.
Further, the upper swinging device 314 and the lower swinging device 324 adopt air cylinders or hydraulic cylinders, equipment automatically senses and controls the input and the opening of the upper and lower brush rolls, air cylinders or hydraulic cylinders of the pressure regulating valve for controlling the upper swinging device 314 and the lower swinging device 324 are arranged, the pre-pressure regulation control of the brush rolls is realized, an air pressure meter/a hydraulic pressure meter is installed, the air pressure value/the hydraulic pressure value can be conveniently seen, the input working height of the upper and lower brush rolls can be vertically adjusted by 40mm, an adjusting mechanism is stable and reliable, and the upper swinging device 314 and the lower swinging device 324 automatically open and retreat to a stop position after the input working of the upper and lower brush rolls is completed.
Further, the moving bracket 2 is further provided with a stop block 301 for limiting the swing angles of the upper base 311 and the lower base 321 respectively, the stop block 301 is installed on the moving bracket through an adjusting plate 302, the adjusting plate 302 is connected with the moving bracket 2 through a screw, and the adjusting plate 302 is provided with a long hole capable of adjusting the installation position; by changing the position of the adjusting plate 302, the pressing/up amount of the brush roller when the upper/lower brush roller is put into brushing is limited, and the horizontal tangent line height of the working surface when the upper/lower brush roller is put into brushing is ensured to be coincident with the horizontal line of the surface of the steel plate of the production line. As a further development of the solution, the stop can also be mounted in an adjustable position by means of a screw connection or can be replaced by a wedge assembly.
Further, the movable support 2 is in a C shape, that is, an empty groove 21 capable of accommodating a workpiece (steel plate) is formed between the upper brush roller mechanism and the lower brush roller mechanism in the movable support 2, the depth of the empty groove 21 is 100 mm-200 mm, and dense bristles are arranged on the upper side, the lower side, the left side and the right side of the empty groove 21 in the movable support 2 to assist in cleaning welding slag.
Further, the device also comprises a fixed frame 1, wherein a guide rail is arranged on the fixed frame 1, and the movable bracket 2 is arranged on the guide rail through a sliding seat; the fixed frame 1 is also provided with a hydraulic cylinder 11 or an air cylinder or other lead screw driving mechanism for driving the movable bracket to slide along the guide rail, the total movement stroke=the width of the production line+200mm, and the hydraulic cylinder 11 or the air cylinder or other lead screw driving mechanism 11 drives the movable frame 2 to move for about 7 seconds.
Further, a dust collecting device 4 is also included, and the dust collecting device 4 is communicated with the empty groove 21. The dust collecting device 4 includes a dust collecting box 41 and a dust collecting fan 42 and a dust filter 43 mounted on the dust collecting box 41, the dust collecting box 41 being mounted on the moving bracket 2. The dust collecting fan 42 sucks the foreign matters such as dust generated by brushing the weld joint into the dust filter 43, and finally the dust falls into the dust collecting box 41, and the dust collecting mechanism 4 is mounted on the moving frame 2 and moves together with the moving frame 2, and ensures the deslagging effect.
Further, the hydraulic control system consists of a hydraulic control valve table, a hydraulic cylinder, corresponding pipelines and an electric control, and provides driving force for the movable frame. The hydraulic system pressure was 10mpa and the flow was 145 liters/min.
Further, the pneumatic control system consists of a pneumatic control valve table, an air cylinder, corresponding pipelines and an electric control, and provides driving force for the swing of the base. The pneumatic system pressure was 5.5bar and the flow was 20 liters/min.
Further, the electrical system comprises a control monitoring system and a power system, and the electrical system automatically detects the width of the steel plate and controls the travelling of the movable frame, the throwing of the brush roller, the opening of the brush roller and the dust collection. Can realize manual control and full-automatic control, is provided with independent operation panel. The full-automatic control operation scheme is as follows:
the production line control system sends a welding line cleaning signal in advance of 20 seconds, the upper/lower brush rollers of the welding line slag cleaning equipment are started in a rotating mode, dust collection is started, the movable frame is moved to a preparation position, the welding line is moved to a brushing position, the upper/lower brush rollers are put into brushing, the movable frame is moved along the direction of the welding line, brushing is completed, the welding line slag cleaning equipment returns to an initial position, and the welding line continues to move.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, i.e., the invention is not limited to the specific embodiments described herein, but is to be accorded the full scope of the claims.
Claims (7)
1. The welding slag removing device for the cold rolling production line is characterized by comprising a movable support and a dust collecting device, wherein an upper brush roller mechanism and a lower brush roller mechanism are respectively arranged on the upper side and the lower side of the movable support; the upper brush roll mechanism comprises an upper base, an upper driving device, an upper brush roll and an upper swinging device, and the lower brush roll mechanism comprises a lower base, a lower driving device, a lower brush roll and a lower swinging device; the middle parts of the upper base and the lower base are respectively hinged to the movable support through a swinging shaft, the upper brush roller and the lower brush roller are respectively arranged at one ends of the upper base and the lower base, the upper driving device and the lower driving device are respectively arranged on the upper base and the lower base and are respectively connected and driven to synchronously rotate, and the upper swinging device and the lower swinging device are respectively arranged on the movable support and are respectively connected and driven to the other ends of the upper base and the lower base so that the upper base and the lower base can swing around the swinging shaft; the movable support is provided with a hollow groove between the upper brush roll mechanism and the lower brush roll mechanism, bristles are arranged on the upper side, the lower side, the left side and the right side of the hollow groove, and the dust collecting device is communicated with the hollow groove; when in working state, the front-back difference of the horizontal projection positions of the upper brush roller and the lower brush roller on the workpiece is 5-10 mm.
2. The cold rolling production line slag removing apparatus as set forth in claim 1, wherein the upper driving means and the lower driving means employ a belt transmission mechanism or a motor transmission mechanism.
3. The cold rolling production line slag removing apparatus as set forth in claim 1, wherein the upper swing device and the lower swing device employ air cylinders or hydraulic cylinders.
4. The cold rolling production line slag removing apparatus as set forth in claim 1, wherein stoppers for limiting the swing angles of the upper and lower bases, respectively, are further installed on the moving bracket.
5. The cold rolling production line slag removing device according to claim 4, wherein the stopper is mounted on the movable bracket through an adjusting plate, the adjusting plate is connected with the movable bracket through a screw, and a long hole capable of adjusting the mounting position is formed in the adjusting plate.
6. The cold rolling production line slag removing device according to claim 1, further comprising a fixed frame, wherein a guide rail is arranged on the fixed frame, and the movable bracket is slidably arranged on the guide rail; and a hydraulic cylinder or an air cylinder or a screw rod driving mechanism which is connected with and drives the movable support to slide along the guide rail is also arranged on the fixed frame.
7. A cold rolling line slag removing apparatus as set forth in claim 1 or 6, wherein said dust collecting means includes a dust collecting tank mounted on said movable bracket and a dust collecting fan and a dust filter mounted on said dust collecting tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910091362.9A CN110369849B (en) | 2019-01-30 | 2019-01-30 | Cold rolling production line removes welding slag equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910091362.9A CN110369849B (en) | 2019-01-30 | 2019-01-30 | Cold rolling production line removes welding slag equipment |
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| CN110369849A CN110369849A (en) | 2019-10-25 |
| CN110369849B true CN110369849B (en) | 2023-09-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716194A (en) * | 2020-07-20 | 2020-09-29 | 安徽金威管业有限公司 | Welding seam processing equipment |
| CN112222688A (en) * | 2020-09-27 | 2021-01-15 | 浙江合力制管有限公司 | Welding slag cleaning device of welded pipe unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206373739U (en) * | 2017-01-17 | 2017-08-04 | 佛山海格利德机器人智能设备有限公司 | The floating type oscillating arm mechanisms of belt sander |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0053274A1 (en) * | 1980-11-28 | 1982-06-09 | Siemag Transplan Gmbh | Method of and installation for the continuous mechanical removal of material form casting strand surfaces |
| CN201304603Y (en) * | 2008-11-29 | 2009-09-09 | 常熟华冶薄板有限公司 | Grinding cleaning device for pre-washing continuous hot-dip galvanized steel strip |
| CN201776572U (en) * | 2010-07-07 | 2011-03-30 | 宝山钢铁股份有限公司 | Pre-scrubbing device of lap welder |
| CN203330850U (en) * | 2013-07-15 | 2013-12-11 | 中铁十二局集团第三工程有限公司 | Angle steel deruster |
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| CN110369849A (en) | 2019-10-25 |
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