RU2687782C1 - Машина для внутренней сварки труб в защитном газе - Google Patents
Машина для внутренней сварки труб в защитном газе Download PDFInfo
- Publication number
- RU2687782C1 RU2687782C1 RU2017127747A RU2017127747A RU2687782C1 RU 2687782 C1 RU2687782 C1 RU 2687782C1 RU 2017127747 A RU2017127747 A RU 2017127747A RU 2017127747 A RU2017127747 A RU 2017127747A RU 2687782 C1 RU2687782 C1 RU 2687782C1
- Authority
- RU
- Russia
- Prior art keywords
- welding
- rotating disk
- positioning
- cylinder
- heads
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims abstract description 186
- 230000001681 protective effect Effects 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 174
- 239000002131 composite material Substances 0.000 claims abstract description 31
- 238000007667 floating Methods 0.000 claims abstract description 16
- 230000033001 locomotion Effects 0.000 claims abstract description 11
- 238000013461 design Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 230000001953 sensory effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229930091051 Arenine Natural products 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- -1 electric power Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 230000008832 photodamage Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0531—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor internal pipe alignment clamps
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/027—Carriages for supporting the welding or cutting element for making circular cuts or welds
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0276—Carriages for supporting the welding or cutting element for working on or in tubes
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
- B23K9/1735—Arc welding or cutting making use of shielding gas and of a consumable electrode making use of several electrodes
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2015/000542 WO2017015778A1 (fr) | 2015-07-29 | 2015-07-29 | Appareil de soudage interne à gaz de protection pour un pipeline |
Publications (1)
Publication Number | Publication Date |
---|---|
RU2687782C1 true RU2687782C1 (ru) | 2019-05-16 |
Family
ID=56623971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU2017127747A RU2687782C1 (ru) | 2015-07-29 | 2015-07-29 | Машина для внутренней сварки труб в защитном газе |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN105873718B (fr) |
RU (1) | RU2687782C1 (fr) |
WO (1) | WO2017015778A1 (fr) |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106064285B (zh) * | 2016-08-24 | 2017-08-01 | 中国航天科技集团公司长征机械厂 | 连杆式涨圈 |
CN106655656B (zh) * | 2016-12-29 | 2023-02-24 | 重庆市爱华机电有限公司双福分公司 | 一种用于电枢绕组的扁铜线扭头机构 |
CN106903463A (zh) * | 2017-03-22 | 2017-06-30 | 苏州华越金属有限公司 | 一种空调用电子膨胀阀组件无水保护焊接设备及工艺 |
CN107350603A (zh) * | 2017-08-31 | 2017-11-17 | 苏鸿远 | 一种管道焊接装置 |
CN107457521B (zh) * | 2017-09-11 | 2023-07-07 | 河北创力机电科技有限公司 | 一种用于筒状件支撑圈的自动焊接机 |
CN109926773B (zh) * | 2017-12-15 | 2020-12-01 | 中国石油天然气集团公司 | 旋转盘机构及内焊机 |
CN110142523B (zh) * | 2018-02-13 | 2021-01-29 | 中国石油天然气集团有限公司 | 内焊装置及其控制方法 |
CN108555491B (zh) * | 2018-02-27 | 2020-04-03 | 朱湘冀 | 一种管道内焊锁定支架及模块化管道内焊系统 |
CN108436356A (zh) * | 2018-03-02 | 2018-08-24 | 无锡琼琚机械科技有限公司 | 一种焊接设备 |
CN108568626A (zh) * | 2018-06-26 | 2018-09-25 | 四川艾普耐斯油气工程服务有限公司 | 一种新型管道内对口器 |
CN108612926A (zh) * | 2018-06-28 | 2018-10-02 | 永胜机械工业(昆山)有限公司 | 一种筒体管口油压自动对口装置 |
CN109048135B (zh) * | 2018-09-19 | 2023-09-19 | 广东省科学院中乌焊接研究所 | 一种焊接气体保护装置 |
CN109187735B (zh) * | 2018-11-09 | 2024-03-26 | 成都熊谷油气科技有限公司 | 一种在役长输管线环焊缝缺陷磁粉内检测机构及检测方法 |
CN109262195A (zh) * | 2018-11-22 | 2019-01-25 | 山东中车同力钢构有限公司 | 一种风电塔架法兰组对胎装置及方法 |
CN110315207A (zh) * | 2019-07-25 | 2019-10-11 | 湖北三江航天红阳机电有限公司 | 管道内焊机 |
CN110435159B (zh) * | 2019-09-06 | 2024-05-14 | 苏州赛腾菱欧智能科技有限公司 | 一种适用于汽车碳罐的超声波焊接设备 |
CN110744217B (zh) * | 2019-11-08 | 2023-11-14 | 广东亿恒工业装备有限公司 | 可直接换型的隧道式焊机及其焊接方法 |
CN110900045B (zh) * | 2019-12-11 | 2020-10-09 | 成都熊谷加世电器有限公司 | 一种管道内焊机 |
CN113020761A (zh) * | 2019-12-24 | 2021-06-25 | 梅广庆 | 一种金属管道根焊焊缝内部强制成型的方法及内对口器 |
CN110936096B (zh) * | 2019-12-27 | 2024-05-28 | 无锡华联科技集团有限公司 | 集油管焊接装置 |
CN110936045A (zh) * | 2019-12-31 | 2020-03-31 | 无锡四方友信股份有限公司 | 一种箍耳自动焊机 |
CN111812128B (zh) * | 2020-07-18 | 2023-05-09 | 王震 | 一种管径适应调节管道防辐射探伤装置 |
CN114055067A (zh) * | 2020-07-29 | 2022-02-18 | 上海宝信软件股份有限公司 | 适用于铝卷的移动式内撑焊接装置 |
CN112271432B (zh) * | 2020-10-09 | 2022-04-05 | 中国电子科技集团公司第三十八研究所 | 一种升降式快速定位旋锁 |
CN114619197A (zh) * | 2020-12-10 | 2022-06-14 | 中国石油天然气集团有限公司 | 管道内焊机 |
CN112719516B (zh) * | 2020-12-10 | 2022-06-14 | 渤海造船厂集团有限公司 | 一种柔性可调式筒形结构环缝焊接保护气密封装置及方法 |
CN112756739A (zh) * | 2020-12-24 | 2021-05-07 | 南昌航空大学 | 一种小管内壁堆焊增材制造装置 |
CN114850577B (zh) * | 2021-02-03 | 2024-05-28 | 中国石油天然气集团有限公司 | 管道坡口机 |
CN113510433B (zh) * | 2021-04-16 | 2022-08-09 | 睿信泰智能科技(昆山)有限公司 | 组合式对胀芯工装 |
CN113579630B (zh) * | 2021-07-27 | 2023-04-14 | 中航西安飞机工业集团股份有限公司 | 一种飞机发动机排气筒环缝激光焊接夹具和焊接方法 |
CN113732609B (zh) * | 2021-08-27 | 2024-06-07 | 航天海鹰(哈尔滨)钛业有限公司 | 阶梯式环形零件高精度对接环焊内撑工装及其焊接方法 |
CN113927196B (zh) * | 2021-11-17 | 2023-05-09 | 中国石油天然气集团有限公司 | 一种基于视觉定位的管道内焊弯头对口器及对口方法 |
CN114178753B (zh) * | 2021-12-21 | 2023-08-18 | 海宁红狮宝盛科技有限公司 | 一种用于航空部件的焊接装置 |
CN114473277B (zh) * | 2022-01-26 | 2024-04-05 | 浙江大学台州研究院 | 一种用于取线和焊接的高精度定位装置以及方法 |
CN114589434A (zh) * | 2022-01-28 | 2022-06-07 | 浙江阿凡特精密设备制造有限公司 | 推管机推拉油缸焊接装置及焊接方法 |
CN114227051B (zh) * | 2022-02-24 | 2022-05-24 | 徐州奇拓智能科技有限公司 | 一种用于vr显示组件焊接加工的全自动装置 |
CN114713949B (zh) * | 2022-03-23 | 2024-05-28 | 西安菲尔特金属过滤材料股份有限公司 | 一种用于金属网带自动焊接背面气体保护装置 |
CN114505645B (zh) * | 2022-04-20 | 2022-07-26 | 杭州泰尚智能装备有限公司 | 一种焊接用定位装夹回转机构及其操作方法 |
CN114770016B (zh) * | 2022-04-22 | 2024-04-12 | 安川首钢机器人有限公司 | 一种缸体加工系统及方法 |
CN115178832B (zh) * | 2022-07-29 | 2023-08-22 | 厦门市特种设备检验检测院 | 一种防护性高的管道用焊接装置及其焊接方法 |
CN115401305A (zh) * | 2022-09-27 | 2022-11-29 | 陕西风润智能制造研究院有限公司 | 一种薄壁筒体焊接组装胀圆装置 |
CN116140873A (zh) * | 2022-12-08 | 2023-05-23 | 南通海国机械有限公司 | 一种船舶钢结构加工用热铆焊接装置 |
CN116038234B (zh) * | 2022-12-28 | 2023-09-08 | 江苏东水智慧节水灌溉科技有限公司 | 一种大型农业喷灌设备的焊接装置 |
CN116329841B (zh) * | 2023-04-12 | 2024-05-10 | 山东辉腾防腐设备有限公司 | 一种钢衬四氟储罐加工用焊接装置 |
CN117600611B (zh) * | 2023-11-02 | 2024-05-07 | 武汉市睿意达技术有限公司 | 一种逆变式气体保护焊机 |
CN117450143B (zh) * | 2023-12-26 | 2024-03-05 | 华海通信技术有限公司 | 一种筒体内部单元的涨紧结构及筒体内部单元 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU173358A1 (ru) * | Специальное конструкторское бюро Газстроймашина Главного управлени газовой промышленности при Совете Министров СССР | УСТРОЙСТВО ДЛЯ СВАРКИ ПОВОРОТНЫХ СТЫКОВ ТРУБLL :'.и.и^ .•; ..i-^ r;v,:;iTi;3 -•>& 1;::;:-:^;[:с::;п р';5л:;о1^;:А | ||
GB1526248A (en) * | 1977-01-26 | 1978-09-27 | Charlton E | Welding boom device |
SU1026996A1 (ru) * | 1982-03-16 | 1983-07-07 | Ленинградский Филиал Проектно-Технологического Института "Энергомонтажпроект" | Устройство дл автоматической сварки внутренних кольцевых швов |
JPH01245977A (ja) * | 1988-03-26 | 1989-10-02 | Shimadzu Corp | 核燃料棒の端栓溶接装置に用いる部品供給装置 |
RU2298129C1 (ru) * | 2005-08-09 | 2007-04-27 | Закрытое акционерное общество "Дизель-Ремонт" (ЗАО "Дизель-Ремонт") | Линия для сборки и сварки стыков труб |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1079390A1 (ru) * | 1983-01-25 | 1984-03-15 | Ордена Ленина И Ордена Трудового Красного Знамени Институт Электросварки Им.Е.О.Патона | Сварочный аппарат |
CN2863340Y (zh) * | 2005-07-18 | 2007-01-31 | 中国航空工业第一集团公司北京航空制造工程研究所 | 电子束焊接送丝机 |
CN103350295B (zh) * | 2013-06-25 | 2016-08-10 | 洛阳德平科技股份有限公司 | 一种内焊机气管及电线的内嵌方法及内焊机 |
CN103706976B (zh) * | 2013-12-14 | 2015-05-13 | 郑州市长城机器制造有限公司 | 一种自动焊机 |
-
2015
- 2015-07-29 RU RU2017127747A patent/RU2687782C1/ru not_active IP Right Cessation
- 2015-07-29 CN CN201580003001.4A patent/CN105873718B/zh active Active
- 2015-07-29 WO PCT/CN2015/000542 patent/WO2017015778A1/fr active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU173358A1 (ru) * | Специальное конструкторское бюро Газстроймашина Главного управлени газовой промышленности при Совете Министров СССР | УСТРОЙСТВО ДЛЯ СВАРКИ ПОВОРОТНЫХ СТЫКОВ ТРУБLL :'.и.и^ .•; ..i-^ r;v,:;iTi;3 -•>& 1;::;:-:^;[:с::;п р';5л:;о1^;:А | ||
GB1526248A (en) * | 1977-01-26 | 1978-09-27 | Charlton E | Welding boom device |
SU1026996A1 (ru) * | 1982-03-16 | 1983-07-07 | Ленинградский Филиал Проектно-Технологического Института "Энергомонтажпроект" | Устройство дл автоматической сварки внутренних кольцевых швов |
JPH01245977A (ja) * | 1988-03-26 | 1989-10-02 | Shimadzu Corp | 核燃料棒の端栓溶接装置に用いる部品供給装置 |
RU2298129C1 (ru) * | 2005-08-09 | 2007-04-27 | Закрытое акционерное общество "Дизель-Ремонт" (ЗАО "Дизель-Ремонт") | Линия для сборки и сварки стыков труб |
Also Published As
Publication number | Publication date |
---|---|
CN105873718A (zh) | 2016-08-17 |
CN105873718B (zh) | 2017-05-24 |
WO2017015778A1 (fr) | 2017-02-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2687782C1 (ru) | Машина для внутренней сварки труб в защитном газе | |
KR101462824B1 (ko) | 타이어 시험기용의 타이어 끼움 지지 부재 | |
CN109592403B (zh) | 一种风电叶片自动翻转夹持装置 | |
CN110609231B (zh) | 伺服电机耐久测试台 | |
KR101642972B1 (ko) | 강관 용접용 센터링 장치 | |
CN108581428A (zh) | 一种舞台管件专用压管机 | |
CN215364813U (zh) | 一种节能型瓶盖装配用旋转装置 | |
CN106624733A (zh) | 一种活塞销压装装置 | |
CN106736432B (zh) | 轴承辅助安装装置及轴承安装方法 | |
CN106112454B (zh) | 阀体与橡胶圈装配机构的阀体与橡胶圈旋转上料组件 | |
CN113427327A (zh) | 一种大深径比长管零件的相交孔边缘加工方法及装置 | |
CN211072461U (zh) | 一种高精度钢管接缝环绕焊接工装 | |
CN208680828U (zh) | 一种贮油筒端盖和螺栓的焊接工装 | |
CN102275056A (zh) | 一种压力容器端盖两侧管接头焊接装置 | |
CN107214491B (zh) | 一种注射器针座接头与针筒自动组装机 | |
CN104551620B (zh) | 一种用于齿轴系统的快速拆装装置 | |
JP2015100809A (ja) | 管継手締付機 | |
CN116175041A (zh) | 一种换挡转臂焊接用工装及焊接装置 | |
CN112025428B (zh) | 一种钢管除锈机 | |
CN208450985U (zh) | 一种舞台管件专用压管机 | |
CN108953605B (zh) | 具有密封表面延伸部的环密封结构 | |
CN210531303U (zh) | 一种液压油缸顶盖与油缸连接结构 | |
CN202143993U (zh) | 一种压力容器端盖两侧管接头焊接装置 | |
CN202255435U (zh) | 一种用于内撑式套筒的夹具 | |
CN204308343U (zh) | 一种钢管螺纹加工装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | The patent is invalid due to non-payment of fees |
Effective date: 20200730 |