CN103381567B - A kind of steel bar welding joint sanding apparatus and polishing process - Google Patents
A kind of steel bar welding joint sanding apparatus and polishing process Download PDFInfo
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- CN103381567B CN103381567B CN201310254700.9A CN201310254700A CN103381567B CN 103381567 B CN103381567 B CN 103381567B CN 201310254700 A CN201310254700 A CN 201310254700A CN 103381567 B CN103381567 B CN 103381567B
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Abstract
The invention discloses a kind of steel bar welding joint sanding apparatus, comprise Rack Body, Rack Body is provided with clamp system, clamp system rotary drive mechanism, workpiece polishing mechanism and rear conveying mechanism; Clamp system is arranged along the direction of moving towards of reinforcing bar, and reinforcing bar passes from clamp system inside; Clamp system rotary drive mechanism drives clamp system is moving towards direction plane internal rotation perpendicular to reinforcing bar to turn; Workpiece polishing mechanism is positioned at front or the rear of clamp system, and it is vertical that polishing direction and the reinforcing bar of workpiece polishing mechanism move towards direction; Rear conveying mechanism is positioned at the rear of workpiece polishing mechanism.In the present invention, sanding apparatus mechanization degree is high, and it is convenient to control, and grinding efficiency is high with polishing quality; The supporting leg of Rack Body is Height Adjustable, to regulate the height of sanding apparatus in the present invention according to the high flexible of butt welding machine.
Description
Technical field
The present invention relates to a kind of steel bar welding joint sanding apparatus and apply the polishing process of described sanding apparatus.
Background technology
The main muscle of prefabricated strong concrete square pile reinforcing cage adopts HRB400 screw-thread steel, and automatic seam-welding is shaping, time saving and energy saving, and quality is easily protected.At present, the screw-thread steel finished product that market is sold is generally 9m or 12m fixed length, and the length of square pile reinforcing cage is between 6m ~ 20m, therefore needs screw-thread steel welding to use.In the roll welding production line of steel reinforcement cage, roughly need through process step such as butt welding-polishing-blanking-roll welding shaping grade, after butt welding machine completes butt welding operation, the plumb joint place of screw-thread steel can produce many burrs, cause the bar diameter at plumb joint place to become large, uneven, affect normal roll welding operation.Based on this, need double thread steel before roll welding operation to polish, be not applicable to the grinding machine of this production line at present both at home and abroad.
Summary of the invention
The object of the invention is to propose a kind of steel bar welding joint sanding apparatus, effectively can solve the above-mentioned technical problem existed in prior art.
To achieve these goals, the present invention adopts following technical scheme:
A kind of steel bar welding joint sanding apparatus, comprises Rack Body, Rack Body is provided with clamp system, clamp system rotary drive mechanism, workpiece polishing mechanism and rear conveying mechanism; Clamp system is arranged along the direction of moving towards of reinforcing bar, and reinforcing bar passes from clamp system inside; Clamp system rotary drive mechanism drives clamp system is moving towards direction plane internal rotation perpendicular to reinforcing bar to turn; Workpiece polishing mechanism is positioned at front or the rear of clamp system, and it is vertical that polishing direction and the reinforcing bar of workpiece polishing mechanism move towards direction; Rear conveying mechanism is positioned at the rear of workpiece polishing mechanism; Described Rack Body is provided with Height Adjustable supporting leg.
Described clamp system, comprises clamping cylinder, and clamping column body is provided with axial reinforced steel bar perforation; On the outer surface of clamping cylinder, be along the circumferential direction evenly provided with the briquetting standing groove that several axially stretch; Each briquetting standing groove is inner, be placed with the wedge shape briquetting that a top surface is low early and high after shape, the lower surface of wedge shape briquetting is provided with at least two squeezing rods, one of them squeezing rod is positioned in the front side lower surface of wedge shape briquetting, a squeezing rod is positioned at the bottom rear of wedge shape briquetting on the surface, on briquetting standing groove, corresponding each squeezing rod is provided with an extruded hole, and extruded hole is communicated with reinforced steel bar perforation; Each squeezing rod is equipped with a Compress Spring; The outer surface of clamping cylinder is equipped with an annular compression block, and annular compression block moves along the axial direction of clamping cylinder; Rolling bearing is provided with between annular compression block and clamping cylinder.
Further, the compressive plane of described squeezing rod is an arc extruding end face, the length direction of arc extruding end face and reinforcing bar to move towards direction consistent.
Described clamp system rotary drive mechanism, comprises reinforcing bar poling and power-driven mechanism; Reinforcing bar poling inside is in hollow structure; Power-driven mechanism, comprise moving runner, lower moving runner and rotary drive motor, upper moving runner is arranged on the leading section of reinforcing bar poling, chain or belt is adopted to carry out transmission between upper moving runner and lower moving runner, rotary drive motor output shaft is connected on lower moving runner, and the rearward end of reinforcing bar poling is connected on clamping cylinder; Reinforcing bar poling is communicated with clamping cylinder.
Further, described annular compression block is configured with actuating cylinder, and this actuating cylinder comprises cylinder rod and cylinder barrel; Cylinder rod is fixed on Rack Body, inner in hollow structure; Cylinder barrel is connected with annular compression block; Cylinder rod is nested with in the body portion of reinforcing bar poling, and reinforcing bar poling is connected by the rolling bearing being arranged on cylinder rod two ends with between cylinder rod.
Described workpiece polishing mechanism, comprises pedestal and polishing main body, is provided with the slide mechanism moving towards direction perpendicular to reinforcing bar between pedestal and polishing main body; Polishing main body is provided with polishing motor and grinding wheel.
Described rear conveying mechanism, is included in the conveying wheels that several that Rack Body is arranged are yi word pattern arrangement; Each conveying wheels, comprise a delivery wheel and a delivery wheel mounting bracket, delivery wheel mounting bracket is arranged on Rack Body, and delivery wheel is provided with reinforcing bar standing groove along the circumferential direction.
The present invention also aims to propose a kind of steel bar welding joint polishing process, adopt above-mentioned steel bar welding joint sanding apparatus, its technical scheme is as follows:
A kind of steel bar welding joint polishing process, comprises following job step:
The height of a, adjustment supporting leg, reinforcing bar poling aimed at by the reinforcing bar that butt welding machine is exported;
B, reinforcing bar pass from reinforcing bar poling, clamping column body successively, and the reinforcing bar standing groove being overlapped on rear conveying mechanism is inner, and when needing the plumb joint of polishing to let drive at emery wheel, reinforcing bar stops transmitting;
C, actuating cylinder work, cylinder barrel drives annular compression block to be moved side backward by the front side clamping cylinder, progressively extrudes wedge shape briquetting, and the squeezing rod being positioned at wedge shape briquetting lower surface passes extruded hole and clamps reinforcing bar;
D, rotary drive motor work, reinforcing bar poling rotates and drives clamping cylinder and reinforcing bar synchronous rotary;
E, polishing machine operation, the adjustment polishing position of main body on pedestal, makes grinding wheel polish near plumb joint, reinforcing bar in rotary course, grinding wheel polishing plumb joint place burr;
After f, joint to be welded sanding burr, close polishing motor, remove polishing main body, rotary drive motor quits work, actuating cylinder is action again, and cylinder barrel drives annular compression block to be moved side forward by the rear side clamping cylinder, and squeezing rod unclamps the clamping to reinforcing bar, one time sanding operation terminates, and reinforcing bar continues conveying along rear conveying mechanism to seam welder; Return step b, enter and polish next time.
Further, in described steps d, the rotating speed of reinforcing bar poling is 15 ~ 20 revs/min.
Advantage of the present invention is:
Steel bar welding joint sanding apparatus in the present invention, comprise clamp system, clamp system rotary drive mechanism, workpiece polishing mechanism and rear conveying mechanism, this sanding apparatus place is delivered to through the steel bar welding joint of butt welding machine to postwelding, first clamp reinforcing bar by clamp system, now steel bar welding joint is positioned at workpiece polishing mechanism place, clamp system and reinforcing bar synchronous rotary is driven again through clamp system rotary drive mechanism, then workpiece polishing mechanism is opened, and workpiece polishing mechanism is moved to plumb joint place and carry out sanding burr, reinforcing bar after polishing by after conveying mechanism be transported to seam welder easily and carry out roll welding and operate, conveying is convenient, decrease manual operation.Sanding apparatus mechanization degree in the present invention is high, and it is convenient to control, and grinding efficiency is high with polishing quality; The supporting leg of Rack Body is Height Adjustable, facilitates the matched of sanding apparatus and butt welding machine in the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of steel bar welding joint sanding apparatus in the present invention;
Fig. 2 is structural representation when clamp system and workpiece polishing mechanism coordinate in Fig. 1;
Fig. 3 is the structural representation of clamp system in Fig. 2;
Fig. 4 is the structural representation of workpiece polishing mechanism in Fig. 2;
Fig. 5 is the structural representation clamping cylinder in Fig. 3;
Fig. 6 is the structural representation of wedge shape briquetting in Fig. 3;
Fig. 7 is a side view of wedge shape briquetting in Fig. 6;
Fig. 8 is view when squeezing rod passes extruded hole in Fig. 3;
Fig. 9 is the structural representation of rear conveying mechanism conveying wheels in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
Shown in composition graphs 1, Fig. 2, a kind of steel bar welding joint sanding apparatus, comprise Rack Body 1, Rack Body is provided with clamp system 2, clamp system rotary drive mechanism 3, workpiece polishing mechanism 4 and rear conveying mechanism 5, rear conveying mechanism 5 is positioned at the rear of workpiece polishing mechanism 4, be responsible for that the reinforcing bar of polishing through workpiece polishing mechanism 4 is delivered to seam welder and carry out roll welding operation, carry convenient and strength-saving; Clamp system is arranged along the direction of moving towards of reinforcing bar, and reinforcing bar passes from clamp system inside; Clamp system rotary drive mechanism 3 drives clamp system 2 is moving towards direction plane internal rotation perpendicular to reinforcing bar to turn; Preferably, workpiece polishing mechanism is positioned at the rear of clamp system, and it is vertical that polishing direction and the reinforcing bar of workpiece polishing mechanism move towards direction, and workpiece polishing mechanism 4 fully can be polished to the steel bar welding joint rotated.Certainly, workpiece polishing mechanism also can be positioned at the front of clamp system.Rack Body 1 is provided with Height Adjustable supporting leg 101.Wherein, the implementation of supporting leg 101 is varied, the inner support leg that in the present invention, supporting leg can be slidably matched mutually by two and outer support leg form (not shown), set screw is provided with between inner support leg and outer support leg, by the height of the degree of tightness Reasonable adjustment supporting leg 101 of set screw, to adapt to the height of butt welding machine, reinforcing bar is facilitated to be carried to sanding apparatus by butt welding machine.
As shown in Fig. 3, Fig. 5, Fig. 6, Fig. 7, clamp system 2, comprises clamping cylinder 201, and clamping column body is provided with axial reinforced steel bar perforation 202, on the outer surface of clamping cylinder, be along the circumferential direction evenly provided with the briquetting standing groove 203 that several axially stretch, be preferably provided with three briquetting standing grooves in the present invention, three briquetting standing grooves are positioned at three Along ent places of circumferencial direction, each briquetting standing groove is inner, be placed with the wedge shape briquetting 212 of a top surface 210 in low early and high after shape, the lower surface 211 of wedge shape briquetting is provided with at least two squeezing rods 204, when arranging two squeezing rods, one of them squeezing rod is positioned in the front side lower surface of wedge shape briquetting, a squeezing rod is positioned at the bottom rear of wedge shape briquetting on the surface, when arranging three squeezing rods, another one squeezing rod is positioned at the lower surface middle of wedge shape briquetting, on briquetting standing groove, corresponding each squeezing rod is provided with an extruded hole 205, extruded hole is communicated with reinforced steel bar perforation, each squeezing rod is equipped with a Compress Spring 206, when wedge shape briquetting is squeezed, Compress Spring compresses further, squeezing rod 204 passes extruded hole 205 and clamps reinforcing bar, as shown in Figure 8.The outer surface of clamping cylinder is equipped with an annular compression block 207, and this annular briquetting is configured with actuating cylinder, drives ring-type crushing block 207 to move along the axial direction of clamping cylinder, makes squeezing rod compress or unclamp reinforcing bar; Between annular compression block and clamping cylinder, be provided with rolling bearing, be convenient to the rotation clamping cylinder and reinforcing bar.
Preferably, the compressive plane of squeezing rod 204 is an arc extruding end face 208, it is consistent that the arc extruding length direction of end face and reinforcing bar move towards direction, fit closely between arc extruding end face and reinforcing bar, clamping effect is good, simultaneously in order to strengthen the clamping effect of arc extruding end face further, can extrude on end face arrange non-slip groove at arc, the groove direction of non-slip groove extrudes the length direction of end face perpendicular to arc.In addition, for convenience of squeezing rod through extruded hole, in two length edges of arc extruding end face 208, form two inclined cutting walls 209 by the extruding end of cutting squeezing rod, as shown in Figure 6, Figure 7.
Shown in composition graphs 2, clamp system rotary drive mechanism 3, comprises reinforcing bar poling 301 and power-driven mechanism; Reinforcing bar poling inside is in hollow structure; Power-driven mechanism, comprise moving runner 302, lower moving runner 303 and rotary drive motor 304, upper moving runner is arranged on the leading section of reinforcing bar poling, chain is adopted to carry out transmission between upper moving runner and lower moving runner, rotary drive motor output shaft is connected on lower moving runner, and the rearward end of reinforcing bar poling is connected on clamping cylinder 201; Reinforcing bar poling is communicated with clamping cylinder, and reinforcing bar passes from reinforcing bar poling and clamping column body successively.Certainly, belt can also be adopted to carry out transmission between upper moving runner and lower moving runner.
As shown in Figure 3, actuating cylinder comprises cylinder rod 213 and cylinder barrel 214; Cylinder rod is fixed on Rack Body, inner in hollow structure; Be welded to connect by multichip connection sheet 215 between cylinder barrel and annular compression block; Cylinder rod is nested with in the body portion of reinforcing bar poling, and reinforcing bar poling is connected by the rolling bearing being arranged on cylinder rod two ends with between cylinder rod.
Shown in composition graphs 4, workpiece polishing mechanism 4, comprises pedestal 401 and polishing main body, is provided with the slide mechanism moving towards direction perpendicular to reinforcing bar between pedestal and polishing main body; Polishing main body is provided with polishing motor 402 and grinding wheel 403.Slide mechanism, comprise the slide rail 404 be arranged on pedestal, be arranged on polishing bottom part body slide block 405 and for controlling the leading screw 406 that slide block slides on slide rail, the end of leading screw is provided with handwheel, by handwheel shake polishing main body rectilinear motion on direction move towards perpendicular to reinforcing bar, thus close or away from steel bar welding joint.
Shown in composition graphs 1, Fig. 9, rear conveying mechanism 5, be included on Rack Body 1 arrange several be yi word pattern arrange conveying wheels; Each conveying wheels, comprise a delivery wheel 501 and a delivery wheel mounting bracket 502, delivery wheel mounting bracket 502 is arranged on Rack Body 1, delivery wheel mounting bracket 502 is fixed a back shaft 503, it is vertical that setting direction and the reinforcing bar of back shaft move towards direction, delivery wheel 501 is nested with and also can rotates around back shaft 503 on back shaft 503, and delivery wheel 501 is provided with reinforcing bar standing groove 504 along the circumferential direction, and reinforcing bar is taken and is placed on reinforcing bar standing groove 504 inside.Reinforcing bar standing groove 504 and reinforced steel bar perforation 202 are on same level line.
In the present invention, the polishing process of sanding apparatus is as follows:
The height of a, adjustment supporting leg, reinforcing bar poling aimed at by the reinforcing bar that butt welding machine is exported;
B, reinforcing bar pass from reinforcing bar poling, clamping column body successively, and the reinforcing bar standing groove being overlapped on rear conveying mechanism is inner, and when needing the plumb joint of polishing to let drive at emery wheel, reinforcing bar stops transmitting;
C, actuating cylinder work, cylinder barrel drives annular compression block to be moved side backward by the front side clamping cylinder, progressively extrudes wedge shape briquetting, and the squeezing rod being positioned at wedge shape briquetting lower surface passes extruded hole and clamps reinforcing bar;
D, rotary drive motor work, reinforcing bar poling rotates and drives clamping cylinder and reinforcing bar synchronous rotary, and wherein, the rotating speed of reinforcing bar poling is 15 ~ 20 revs/min;
E, polishing machine operation, the adjustment polishing position of main body on pedestal, makes grinding wheel polish near plumb joint, reinforcing bar in rotary course, grinding wheel polishing plumb joint place burr;
After f, joint to be welded sanding burr, close polishing motor, remove polishing main body, rotary drive motor quits work, actuating cylinder is action again, and cylinder barrel drives annular compression block to be moved side forward by the rear side clamping cylinder, and squeezing rod unclamps the clamping to reinforcing bar, one time sanding operation terminates, and reinforcing bar continues conveying along rear conveying mechanism to seam welder; Return step b, enter and polish next time.
Certainly; more than illustrate and be only preferred embodiment of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this description; made all equivalently to substitute, obvious variant, within the essential scope all dropping on this description, protection of the present invention ought to be subject to.
Claims (3)
1. a steel bar welding joint sanding apparatus, is characterized in that, comprises Rack Body, and Rack Body is provided with clamp system, clamp system rotary drive mechanism, workpiece polishing mechanism and rear conveying mechanism; Clamp system is arranged along the direction of moving towards of reinforcing bar, and reinforcing bar passes from clamp system inside; Clamp system rotary drive mechanism drives clamp system is moving towards direction plane internal rotation perpendicular to reinforcing bar to turn; Workpiece polishing mechanism is positioned at front or the rear of clamp system, and it is vertical that polishing direction and the reinforcing bar of workpiece polishing mechanism move towards direction; Rear conveying mechanism is positioned at the rear of workpiece polishing mechanism; Described Rack Body is provided with Height Adjustable supporting leg; Described clamp system, comprises clamping cylinder, and clamping column body is provided with axial reinforced steel bar perforation; On the outer surface of clamping cylinder, be along the circumferential direction evenly provided with the briquetting standing groove that several axially stretch; Each briquetting standing groove is inner, be placed with the wedge shape briquetting that a top surface is low early and high after shape, the lower surface of wedge shape briquetting is provided with at least two squeezing rods, one of them squeezing rod is positioned in the front side lower surface of wedge shape briquetting, a squeezing rod is positioned at the bottom rear of wedge shape briquetting on the surface, on briquetting standing groove, corresponding each squeezing rod is provided with an extruded hole, and extruded hole is communicated with reinforced steel bar perforation; Each squeezing rod is equipped with a Compress Spring; The outer surface of clamping cylinder is equipped with an annular compression block, and annular compression block moves along the axial direction of clamping cylinder; Rolling bearing is provided with between annular compression block and clamping cylinder; Described workpiece polishing mechanism comprises pedestal and polishing main body, is provided with the slide mechanism moving towards direction perpendicular to reinforcing bar between pedestal and polishing main body; Polishing main body is provided with polishing motor and grinding wheel; The compressive plane of described squeezing rod is an arc extruding end face, the length direction of arc extruding end face and reinforcing bar to move towards direction consistent; Described clamp system rotary drive mechanism, comprises reinforcing bar poling and power-driven mechanism; Reinforcing bar poling inside is in hollow structure; Power-driven mechanism, comprise moving runner, lower moving runner and rotary drive motor, upper moving runner is arranged on the leading section of reinforcing bar poling, chain or belt is adopted to carry out transmission between upper moving runner and lower moving runner, rotary drive motor output shaft is connected on lower moving runner, and the rearward end of reinforcing bar poling is connected on clamping cylinder; Reinforcing bar poling is communicated with clamping cylinder; Described annular compression block is configured with actuating cylinder, and this actuating cylinder comprises cylinder rod and cylinder barrel; Cylinder rod is fixed on Rack Body, inner in hollow structure; Cylinder barrel is connected with annular compression block; Cylinder rod is nested with in the body portion of reinforcing bar poling, and reinforcing bar poling is connected by the rolling bearing being arranged on cylinder rod two ends with between cylinder rod; Described rear conveying mechanism, is included in the conveying wheels that several that Rack Body is arranged are yi word pattern arrangement; Each conveying wheels, comprise a delivery wheel and a delivery wheel mounting bracket, delivery wheel mounting bracket is arranged on Rack Body, and delivery wheel is provided with reinforcing bar standing groove along the circumferential direction.
2. a steel bar welding joint polishing process, adopts a kind of steel bar welding joint sanding apparatus as claimed in claim 1; It is characterized in that, comprise following job step:
The height of a, adjustment supporting leg, reinforcing bar poling aimed at by the reinforcing bar that butt welding machine is exported;
B, reinforcing bar pass from reinforcing bar poling, clamping column body successively, and the reinforcing bar standing groove being overlapped on rear conveying mechanism is inner, and when needing the plumb joint of polishing to let drive at emery wheel, reinforcing bar stops transmitting;
C, actuating cylinder work, cylinder barrel drives annular compression block to be moved side backward by the front side clamping cylinder, progressively extrudes wedge shape briquetting, and the squeezing rod being positioned at wedge shape briquetting lower surface passes extruded hole and clamps reinforcing bar;
D, rotary drive motor work, reinforcing bar poling rotates and drives clamping cylinder and reinforcing bar synchronous rotary;
E, polishing machine operation, the adjustment polishing position of main body on pedestal, makes grinding wheel polish near plumb joint, reinforcing bar in rotary course, grinding wheel polishing plumb joint place burr;
After f, joint to be welded sanding burr, close polishing motor, remove polishing main body, rotary drive motor quits work, actuating cylinder is action again, and cylinder barrel drives annular compression block to be moved side forward by the rear side clamping cylinder, and squeezing rod unclamps the clamping to reinforcing bar, one time sanding operation terminates, and reinforcing bar continues conveying along rear conveying mechanism to seam welder; Return step b, enter and polish next time.
3. a kind of steel bar welding joint polishing process according to claim 2, is characterized in that, in described steps d, the rotating speed of reinforcing bar poling is 15 ~ 20 revs/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310254700.9A CN103381567B (en) | 2013-06-24 | 2013-06-24 | A kind of steel bar welding joint sanding apparatus and polishing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310254700.9A CN103381567B (en) | 2013-06-24 | 2013-06-24 | A kind of steel bar welding joint sanding apparatus and polishing process |
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| CN103381567A CN103381567A (en) | 2013-11-06 |
| CN103381567B true CN103381567B (en) | 2015-10-14 |
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| CN105415109A (en) * | 2015-11-30 | 2016-03-23 | 乐清市脱众五金工具有限公司 | Safe grinding device for construction reinforcement bars |
| CN105415127A (en) * | 2015-12-03 | 2016-03-23 | 无锡市晨源建筑器材有限公司 | Equipment for polishing steel pipe welding joint |
| CN105415128A (en) * | 2015-12-03 | 2016-03-23 | 无锡市晨源建筑器材有限公司 | Welded steel tube polishing machine |
| CN108687596A (en) * | 2018-05-18 | 2018-10-23 | 中铁十局集团第二工程有限公司 | A kind of end reinforced workpiece polishing mechanism and reinforced bar processing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0829491B2 (en) * | 1989-10-18 | 1996-03-27 | 中部電力株式会社 | Automatic welding device for pipe welds |
| JPH09155707A (en) * | 1995-12-13 | 1997-06-17 | Meidensha Corp | Device for removing welding bead |
| JP2001150145A (en) * | 1999-12-01 | 2001-06-05 | Mitsubishi Electric Corp | Device and method joining strips |
| CN2848465Y (en) * | 2005-05-27 | 2006-12-20 | 北京安东奥尔工程技术有限责任公司 | Multifunction drilling rod overlap grinding machine |
| CN201264158Y (en) * | 2008-09-01 | 2009-07-01 | 胜利油田新大管业科技发展有限责任公司 | Integrated machine for chamfering, cutting and grinding large-caliber pipe hoop |
| CN201693425U (en) * | 2010-04-30 | 2011-01-05 | 浙江金洲管道工业有限公司 | Steel tube fixing structure of burr removing device in straight slit electric resistance welded steel tube |
| CN201960355U (en) * | 2010-12-13 | 2011-09-07 | 李维松 | Multifunctional cutter locking head |
| CN202271255U (en) * | 2011-10-09 | 2012-06-13 | 江苏省南扬机械制造有限公司 | Steel pipe welding seam grinding device |
| CN203330816U (en) * | 2013-06-24 | 2013-12-11 | 青岛兴河建材有限公司 | Steel bar welding point grinding device |
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