CN103358203A - Reinforcing bar welding joint polishing device and polishing method - Google Patents
Reinforcing bar welding joint polishing device and polishing method Download PDFInfo
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- CN103358203A CN103358203A CN2013102508998A CN201310250899A CN103358203A CN 103358203 A CN103358203 A CN 103358203A CN 2013102508998 A CN2013102508998 A CN 2013102508998A CN 201310250899 A CN201310250899 A CN 201310250899A CN 103358203 A CN103358203 A CN 103358203A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 90
- 238000005498 polishing Methods 0.000 title claims abstract description 72
- 238000003466 welding Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 10
- 238000007517 polishing process Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 229910001651 emery Inorganic materials 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a reinforcing bar welding joint polishing device and a polishing method applying the polishing device. The polishing device includes a rack body, wherein a clamping mechanism, a clamping mechanism rotation driving mechanism and a polishing mechanism are arranged on the rack body; the clamping mechanism is arranged in the moving direction of a reinforcing bar; the reinforcing bar penetrates through the clamping mechanism; the clamping mechanism rotation driving mechanism drives the clamping mechanism to rotate in a plane vertical to the moving direction of the reinforcing bar; the polishing mechanism is positioned ahead or behind the clamping mechanism, and the polishing direction of the polishing mechanism is vertical to the moving direction of the reinforcing bar. According to the invention, the polishing device is high in mechanization degree, convenient to control, and high in polishing efficiency and polishing quality; the height of support legs of the rack body can be adjusted, so that the height of the polishing device disclosed by the invention can be flexibly adjusted as per the height of a butt welding machine.
Description
Technical field
The polishing process that the present invention relates to a kind of steel bar welding joint sanding apparatus and use described sanding apparatus.
Background technology
Prefabricated strong concrete square pile reinforcing cage master muscle adopts the HRB400 screw-thread steel, the automatic seam-welding moulding, and time saving and energy saving, quality easily is protected.At present, the screw-thread steel finished product of selling on the market is generally 9m or 12m fixed length, and therefore the length of square pile reinforcing cage need to be used the screw-thread steel welding between 6m～20m.In the roll welding production line of steel reinforcement cage, roughly need through butt welding-polishing-blanking-process steps such as roll welding moulding, butt welding machine is finished after the butt welding operation, and 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 to before the roll welding operation, polish by the double thread steel, be not applicable at present the grinding machine of this production line 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, can effectively solve the above-mentioned technical problem that exists in the prior art.
To achieve these goals, the present invention adopts following technical scheme:
Steel bar welding joint sanding apparatus comprises Rack Body, is provided with clamp mechanism, clamp mechanism rotary drive mechanism and workpiece polishing mechanism at Rack Body; Clamp mechanism is moved towards the direction setting along reinforcing bar, and reinforcing bar passes from clamp mechanism inside; The clamp mechanism rotary drive mechanism drives clamp mechanism and turns at the plane internal rotation that moves towards direction perpendicular to reinforcing bar; Workpiece polishing mechanism is positioned at the place ahead or the rear of clamp mechanism, and polishing direction and the reinforcing bar of workpiece polishing mechanism move towards perpendicular direction; Be provided with Height Adjustable supporting leg on the described stake body.
Described clamp mechanism comprises the clamping cylinder, clamps column body and is provided with axial reinforced steel bar perforation; On the outer surface that clamps cylinder, evenly be provided with in the circumferential direction of the circle 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, be provided with at least two squeezing rods on the lower surface of wedge shape briquetting, one of them squeezing rod is positioned on the front side lower surface of wedge shape briquetting, a squeezing rod is positioned on the bottom rear surface of wedge shape briquetting, corresponding each squeezing rod is provided with an extruded hole on the briquetting standing groove, and extruded hole is communicated with reinforced steel bar perforation; Be equipped with a Compress Spring on each squeezing rod; Be equipped with a ring-type crushing block on the outer surface of clamping cylinder, the ring-type crushing block moves along the axial direction that clamps cylinder; Be provided with rolling bearing between ring-type crushing block and the clamping cylinder.
Further, the compressive plane of described squeezing rod is arc extruding end face, the length direction of arc extruding end face and reinforcing bar to move towards direction consistent.
Described clamp mechanism rotary drive mechanism comprises reinforcing bar poling and power-driven mechanism; Reinforcing bar poling inside is hollow structure; Power-driven mechanism, comprise moving runner, lower moving runner and rotary drive motor, upper driving wheel is arranged on the leading section of reinforcing bar poling, adopt chain or belt to carry out transmission between upper moving runner and the lower moving runner, the rotary drive motor output shaft is connected on the lower moving runner, and the rearward end of reinforcing bar poling is connected to and clamps on the cylinder; The reinforcing bar poling is communicated with the clamping cylinder.
Further, described annular extrusion piece disposes actuating cylinder, and this actuating cylinder comprises cylinder rod and cylinder barrel; Cylinder rod is fixed on the Rack Body, and inside is hollow structure; Cylinder barrel is connected with the ring-type crushing block; Cylinder rod is nested with on the body portion of reinforcing bar poling, is connected by the rolling bearing that is arranged on two ends of cylinder rod between reinforcing bar poling and the cylinder rod.
Described workpiece polishing mechanism comprises pedestal and polishing main body, is provided with the slide mechanism that moves towards direction perpendicular to reinforcing bar between pedestal and the polishing main body; Be provided with polishing motor and grinding wheel in the polishing main body.
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:
Steel bar welding joint polishing process comprises following job step:
The height of a, adjustment supporting leg is so that the reinforcing bar of butt welding machine output is aimed at the reinforcing bar poling;
B, reinforcing bar pass from reinforcing bar poling, clamping column body successively, and when the plumb joint of needs polishing let drive at emery wheel, reinforcing bar stopped to transmit;
C, actuating cylinder work, cylinder barrel drive the ring-type crushing block by the front side that clamps cylinder side shifting backward, progressively push the wedge shape briquetting, and the squeezing rod that is positioned at wedge shape briquetting lower surface passes extruded hole and clamps reinforcing bar;
D, rotary drive motor work, the rotation of reinforcing bar poling also drives clamping cylinder and reinforcing bar synchronous rotary;
E, polishing machine operation are adjusted the position of polishing main body on pedestal so that grinding wheel polishes near plumb joint, reinforcing bar in rotary course, grinding wheel polishing plumb joint place burr;
After f, joint to be welded sanding burr are complete, close the polishing motor, remove the polishing main body, rotary drive motor quits work, actuating cylinder moves again, cylinder barrel drives the ring-type crushing block by the rear side that clamps cylinder side shifting forward, and squeezing rod unclamps the clamping to reinforcing bar, and one time sanding operation finishes; Return step b, enter next time polishing.
Further, in the described steps d, the rotating speed of reinforcing bar poling is 15～20 rev/mins.
Advantage of the present invention is:
Steel bar welding joint sanding apparatus among the present invention, comprise clamp mechanism, clamp mechanism rotary drive mechanism and workpiece polishing mechanism, the process butt welding machine is delivered to this sanding apparatus place to the steel bar welding joint of postwelding, clamp reinforcing bar by clamp mechanism first, this moment, the steel bar welding joint was positioned at the workpiece polishing mechanism place, drive clamp mechanism and reinforcing bar synchronous rotary through the clamp mechanism rotary drive mechanism again, then open workpiece polishing mechanism, and workpiece polishing mechanism is moved to the plumb joint place carry out sanding burr, the sanding apparatus mechanization degree is high, control is convenient, and grinding efficiency and polishing quality are high; The supporting leg of Rack Body is Height Adjustable, in order to regulate the height of sanding apparatus among the present invention according to the high flexible of butt welding machine.
Description of drawings
Fig. 1 is the structural representation of steel bar welding joint sanding apparatus among the present invention;
Fig. 2 is the structural representation of clamp mechanism among Fig. 1;
Fig. 3 is the structural representation of workpiece polishing mechanism among Fig. 1;
Fig. 4 is the structural representation that clamps cylinder among Fig. 2;
Fig. 5 is the structural representation of wedge shape briquetting among Fig. 2;
Fig. 6 is a side view of wedge shape briquetting among Fig. 5;
Fig. 7 is the view when squeezing rod passes extruded hole among Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment the present invention is described in further detail:
In conjunction with shown in Figure 1, steel bar welding joint sanding apparatus comprises Rack Body 1, is provided with clamp mechanism 2, clamp mechanism rotary drive mechanism 3 and workpiece polishing mechanism 4 at Rack Body; Clamp mechanism is moved towards the direction setting along reinforcing bar, and reinforcing bar passes from clamp mechanism inside; Clamp mechanism rotary drive mechanism 3 drives clamp mechanism 2 and turns at the plane internal rotation that moves towards direction perpendicular to reinforcing bar; Preferably, workpiece polishing mechanism is positioned at the rear of clamp mechanism, and polishing direction and the reinforcing bar of workpiece polishing mechanism move towards perpendicular direction, and workpiece polishing mechanism 4 can fully be polished to the steel bar welding joint of rotation.Certainly, workpiece polishing mechanism also can be positioned at the place ahead of clamp mechanism.Be provided with Height Adjustable supporting leg 101 at Rack Body 1.Wherein, the implementation of supporting leg 101 is varied, supporting leg can form (not shown) by the two inner support legs that mutually are slidingly matched and outer support leg among the present invention, between inner support leg and outer support leg, be provided with set screw, rationally adjust the height of supporting leg 101 by the degree of tightness of set screw, in order to adapt to the height of butt welding machine, make things convenient for the conveying of reinforcing bar.
Such as Fig. 2, Fig. 4, Fig. 5, shown in Figure 6, clamp mechanism 2 comprises clamping cylinder 201, clamps column body and is provided with axial reinforced steel bar perforation 202; On the outer surface that clamps cylinder, evenly be provided with in the circumferential direction of the circle the briquetting standing groove 203 that several axially stretch, preferably be provided with three briquetting standing grooves among 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 that a top surface 210 is low early and high after shape, be provided with at least two squeezing rods 204 on the lower surface 211 of wedge shape briquetting, when two squeezing rods are set, one of them squeezing rod is positioned on the front side lower surface of wedge shape briquetting, a squeezing rod is positioned on the bottom rear surface of wedge shape briquetting, when three squeezing rods are set, the another one squeezing rod is positioned at the middle place of lower surface of wedge shape briquetting, corresponding each squeezing rod is provided with an extruded hole 205 on the briquetting standing groove, extruded hole is communicated with reinforced steel bar perforation, be equipped with a Compress Spring 206 on each squeezing rod, when the wedge shape briquetting was squeezed, Compress Spring further compressed, squeezing rod 204 passes extruded hole 205 and clamps reinforcing bar, as shown in Figure 7.Clamp on the outer surface of cylinder and be equipped with a ring-type crushing block 207, this annular briquetting disposes actuating cylinder, drives ring-type crushing block 207 and moves along the axial directions that clamp cylinders, so that squeezing rod compresses or unclamps reinforcing bar; Between ring-type crushing block and clamping cylinder, be provided with rolling bearing, be convenient to clamp the rotation of cylinder and reinforcing bar.
Preferably, the compressive plane of squeezing rod 204 is an arc extruding end face 208, it is consistent that the length direction of arc extruding end face and reinforcing bar move towards direction, fit closely between arc extruding end face and the reinforcing bar, clamp effective, in order further to strengthen the clamping effect of arc extruding end face, can push end face at arc non-slip groove is set simultaneously, the groove perpendicular direction of non-slip groove is in the length direction of arc extruding end face.In addition, pass extruded hole for making things convenient for squeezing rod, in two length edges of arc extruding end face 208, by two inclined cutting walls 209 of extruding end formation of cutting squeezing rod, such as Fig. 5, shown in Figure 6.
In conjunction with shown in Figure 1, clamp mechanism rotary drive mechanism 3 comprises reinforcing bar poling 301 and power-driven mechanism; Reinforcing bar poling inside is hollow structure; Power-driven mechanism, comprise moving runner 302, lower moving runner 303 and rotary drive motor 304, upper driving wheel is arranged on the leading section of reinforcing bar poling, adopt chain to carry out transmission between upper moving runner and the lower moving runner, the rotary drive motor output shaft is connected on the lower moving runner, and the rearward end of reinforcing bar poling is connected to and clamps on the cylinder 201; The reinforcing bar poling is communicated with the clamping cylinder, and reinforcing bar passes from reinforcing bar poling and clamping column body successively.Certainly, can also adopt belt to carry out transmission between upper moving runner and the lower moving runner.
As shown in Figure 2, actuating cylinder comprises cylinder rod 213 and cylinder barrel 214; Cylinder rod is fixed on the Rack Body, and inside is hollow structure; Be welded to connect by multichip connection sheet 215 between cylinder barrel and the ring-type crushing block; Cylinder rod is nested with on the body portion of reinforcing bar poling, is connected by the rolling bearing that is arranged on two ends of cylinder rod between reinforcing bar poling and the cylinder rod.
In conjunction with shown in Figure 3, workpiece polishing mechanism 4 comprises pedestal 401 and polishing main body, is provided with the slide mechanism that moves towards direction perpendicular to reinforcing bar between pedestal and the polishing main body; Be provided with polishing motor 402 and grinding wheel 403 in the polishing main body.Slide mechanism, comprise the slide rail 404 that is arranged on the pedestal, the slide block 405 that is arranged on the polishing bottom part body and the leading screw 406 that slides at slide rail for the control slide block, end at leading screw is provided with handwheel, shake polishing main body rectilinear motion on perpendicular to the direction of reinforcing bar trend by handwheel, thus near or away from the steel bar welding joint.
The polishing process of sanding apparatus is as follows among the present invention:
The height of a, adjustment supporting leg is so that the reinforcing bar of butt welding machine output is aimed at the reinforcing bar poling;
B, reinforcing bar pass from reinforcing bar poling, clamping column body successively, and when the plumb joint of needs polishing let drive at emery wheel, reinforcing bar stopped to transmit;
C, actuating cylinder work, cylinder barrel drive the ring-type crushing block by the front side that clamps cylinder side shifting backward, progressively push the wedge shape briquetting, and the squeezing rod that is positioned at wedge shape briquetting lower surface passes extruded hole and clamps reinforcing bar;
D, rotary drive motor work, the rotation of reinforcing bar poling also drives clamping cylinder and reinforcing bar synchronous rotary; Wherein, the rotating speed of reinforcing bar poling is 15～20 rev/mins;
E, polishing machine operation are adjusted the position of polishing main body on pedestal so that grinding wheel polishes near plumb joint, reinforcing bar in rotary course, grinding wheel polishing plumb joint place burr;
After f, joint to be welded sanding burr are complete, close the polishing motor, remove the polishing main body, rotary drive motor quits work, actuating cylinder moves again, cylinder barrel drives the ring-type crushing block by the rear side that clamps cylinder side shifting forward, and squeezing rod unclamps the clamping to reinforcing bar, and one time sanding operation finishes; Return step b, enter next time polishing.
Certainly; above explanation only is 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 specification; alternative, obvious form of distortion that all that make are equal to all drops within the essential scope of this specification, ought to be subject to protection of the present invention.
Claims (8)
1. steel bar welding joint sanding apparatus is characterized in that, comprises Rack Body, is provided with clamp mechanism, clamp mechanism rotary drive mechanism and workpiece polishing mechanism at Rack Body; Clamp mechanism is moved towards the direction setting along reinforcing bar, and reinforcing bar passes from clamp mechanism inside; The clamp mechanism rotary drive mechanism drives clamp mechanism and turns at the plane internal rotation that moves towards direction perpendicular to reinforcing bar; Workpiece polishing mechanism is positioned at the place ahead or the rear of clamp mechanism, and polishing direction and the reinforcing bar of workpiece polishing mechanism move towards perpendicular direction; Be provided with Height Adjustable supporting leg on the described stake body.
2. steel bar welding joint sanding apparatus according to claim 1 is characterized in that, described clamp mechanism comprises the clamping cylinder, clamps column body and is provided with axial reinforced steel bar perforation; On the outer surface that clamps cylinder, evenly be provided with in the circumferential direction of the circle 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, be provided with at least two squeezing rods on the lower surface of wedge shape briquetting, one of them squeezing rod is positioned on the front side lower surface of wedge shape briquetting, a squeezing rod is positioned on the bottom rear surface of wedge shape briquetting, corresponding each squeezing rod is provided with an extruded hole on the briquetting standing groove, and extruded hole is communicated with reinforced steel bar perforation; Be equipped with a Compress Spring on each squeezing rod; Be equipped with a ring-type crushing block on the outer surface of clamping cylinder, the ring-type crushing block moves along the axial direction that clamps cylinder; Be provided with rolling bearing between ring-type crushing block and the clamping cylinder.
3. steel bar welding joint sanding apparatus according to claim 2 is characterized in that, the compressive plane of described squeezing rod is arc extruding end face, the length direction of arc extruding end face and reinforcing bar to move towards direction consistent.
4. steel bar welding joint sanding apparatus according to claim 2 is characterized in that, described clamp mechanism rotary drive mechanism comprises reinforcing bar poling and power-driven mechanism; Reinforcing bar poling inside is hollow structure; Power-driven mechanism, comprise moving runner, lower moving runner and rotary drive motor, upper driving wheel is arranged on the leading section of reinforcing bar poling, adopt chain or belt to carry out transmission between upper moving runner and the lower moving runner, the rotary drive motor output shaft is connected on the lower moving runner, and the rearward end of reinforcing bar poling is connected to and clamps on the cylinder; The reinforcing bar poling is communicated with the clamping cylinder.
5. steel bar welding joint sanding apparatus according to claim 4 is characterized in that, described annular extrusion piece disposes actuating cylinder, and this actuating cylinder comprises cylinder rod and cylinder barrel; Cylinder rod is fixed on the Rack Body, and inside is hollow structure; Cylinder barrel is connected with the ring-type crushing block; Cylinder rod is nested with on the body portion of reinforcing bar poling, is connected by the rolling bearing that is arranged on two ends of cylinder rod between reinforcing bar poling and the cylinder rod.
6. steel bar welding joint sanding apparatus according to claim 1 is characterized in that, described workpiece polishing mechanism comprises pedestal and polishing main body, is provided with the slide mechanism that moves towards direction perpendicular to reinforcing bar between pedestal and the polishing main body; Be provided with polishing motor and grinding wheel in the polishing main body.
7. steel bar welding joint polishing process is characterized in that, comprises following job step:
The height of a, adjustment supporting leg is so that the reinforcing bar of butt welding machine output is aimed at the reinforcing bar poling;
B, reinforcing bar pass from reinforcing bar poling, clamping column body successively, and when the plumb joint of needs polishing let drive at emery wheel, reinforcing bar stopped to transmit;
C, actuating cylinder work, cylinder barrel drive the ring-type crushing block by the front side that clamps cylinder side shifting backward, progressively push the wedge shape briquetting, and the squeezing rod that is positioned at wedge shape briquetting lower surface passes extruded hole and clamps reinforcing bar;
D, rotary drive motor work, the rotation of reinforcing bar poling also drives clamping cylinder and reinforcing bar synchronous rotary;
E, polishing machine operation are adjusted the position of polishing main body on pedestal so that grinding wheel polishes near plumb joint, reinforcing bar in rotary course, grinding wheel polishing plumb joint place burr;
After f, joint to be welded sanding burr are complete, close the polishing motor, remove the polishing main body, rotary drive motor quits work, actuating cylinder moves again, cylinder barrel drives the ring-type crushing block by the rear side that clamps cylinder side shifting forward, and squeezing rod unclamps the clamping to reinforcing bar, and one time sanding operation finishes; Return step b, enter next time polishing.
8. steel bar welding joint polishing process according to claim 7 is characterized in that, in the described steps d, the rotating speed of reinforcing bar poling is 15～20 rev/mins.
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| CN201310250899.8A CN103358203B (en) | 2013-06-24 | 2013-06-24 | Steel bar welding joint sanding apparatus and polishing process |
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| CN201310250899.8A CN103358203B (en) | 2013-06-24 | 2013-06-24 | Steel bar welding joint sanding apparatus and polishing process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538089A (en) * | 2015-11-26 | 2016-05-04 | 国网北京市电力公司 | Cable insulation shielding layer processing device |
| CN107225478A (en) * | 2017-06-27 | 2017-10-03 | 牛磊落 | A kind of micromodule equipment of automatically grinding reinforcing bar end face |
| CN110055992A (en) * | 2019-04-23 | 2019-07-26 | 谢定茂 | The construction method of pile foundation |
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| CN203292967U (en) * | 2013-06-24 | 2013-11-20 | 青岛兴河建材有限公司 | Polishing device for reinforcing steel bar welding heads |
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| JPH07223073A (en) * | 1994-02-15 | 1995-08-22 | Nkk Corp | Steel pipe repair welding equipment |
| CN2214986Y (en) * | 1994-09-29 | 1995-12-13 | 李媖瑛 | Structure-improved steel bar continuous connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105538089A (en) * | 2015-11-26 | 2016-05-04 | 国网北京市电力公司 | Cable insulation shielding layer processing device |
| CN107225478A (en) * | 2017-06-27 | 2017-10-03 | 牛磊落 | A kind of micromodule equipment of automatically grinding reinforcing bar end face |
| CN110055992A (en) * | 2019-04-23 | 2019-07-26 | 谢定茂 | The construction method of pile foundation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103358203B (en) | 2015-09-23 |
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Address after: 266409, Shandong City, Qingdao province Jiaonan City Town Lane Wang Industrial Zone Patentee after: Qingdao Xinghe New Building Materials Technology Co.,Ltd. Address before: 266409, Shandong City, Qingdao province Jiaonan City Town Lane Wang Industrial Zone Patentee before: QINGDAO XINGHE BUILDING MATERIAL Co.,Ltd. |
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Effective date of registration: 20210423 Address after: 266409 Aishan Industrial Park, Yanghe Town, Jiaozhou City, Qingdao City, Shandong Province Patentee after: Qingdao Haohe Building Materials Technology Co.,Ltd. Address before: 266409, Shandong City, Qingdao province Jiaonan City Town Lane Wang Industrial Zone Patentee before: Qingdao Xinghe New Building Materials Technology Co.,Ltd. |
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