CN106563902A - Automation numerical control welding machine - Google Patents
Automation numerical control welding machine Download PDFInfo
- Publication number
- CN106563902A CN106563902A CN201510653207.3A CN201510653207A CN106563902A CN 106563902 A CN106563902 A CN 106563902A CN 201510653207 A CN201510653207 A CN 201510653207A CN 106563902 A CN106563902 A CN 106563902A
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- Prior art keywords
- welding
- slide plate
- numerical control
- crossbeam
- cross beam
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Classifications
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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
- 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
- B23K37/0252—Steering means
-
- 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
- B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
- B23K37/0229—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member being situated alongside the workpiece
-
- 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
- B23K37/0247—Driving means
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses an automation numerical control welding machine. The automation numerical control welding machine comprises a machine body, a chassis travelling mechanism, a sliding plate elevator mechanism, a cross beam moving mechanism and a welding trolley motion mechanism. The chassis travelling mechanism achieves travelling of the entire welding machine along tracks and rotational motion and controls the position of a welding gun in the X-axis direction. The sliding plate elevator mechanism is installed on the machine body through a chained elevator mechanism, is fixedly connected with the cross beam moving mechanism and controls the position of the welding gun in the Z-axis direction. The cross beam moving mechanism controls a cross beam to make horizontal reciprocating motion and also controls the position of the welding gun in the Y-axis direction. The welding trolley motion mechanism and the cross beam are assembled, and a trolley can move in parallel along the cross beam in a gear-rack transmission mode. The automation numerical control welding machine is low in cost, high in efficiency and high in quality. Long-distance digital control over irregular welding seams of large-sized steel components is realized, large-area, multi-direction, multi-angle, multilayer and multirun welding is achieved, and quick and precise positioning can be performed by arranging position sensors on a kinematic pair.
Description
Technical field
The invention belongs to welding technology field, refers specifically to a kind of automatic numerical control bonding machine.
Background technology
Solder technology enters into Automation of Welding, weld information and welding intellectualization times by welding manual welding, the stage of electroplating equipment wielding machine, and it is more and more important that automatic welding equipment becomes because saving labour and higher welding machine quality, welding efficiency.On the one hand, although China had extensively realized welding automatization technology already in heavy-duty machinery manufacture, but technology of the country in this field is still still immature, and external automatic welding equipment is expensive, and inconvenient after-sale service and maintenance, there is many obstructions.On the other hand, Automation of Welding is the solder technology based on the application with welding robot, supplemented by the application of special welding machine；Wherein, special welding machine mainly solves individual layer single track, the automatic welding of long straight weld, but it can't fully achieve automatic welding, there is welding efficiency, low-quality defect；And welding robot for industry product many specification small lots the characteristics of, it is mainly used in the welding of anisotropic approach part, it is suitable to long weld seam, short weld seam, straight bead, camber line weld seam, the butt welding of multilayer multiple tracks and the welding of angle welding, though operation automation degree is high, existing can not the high defect of operation and operating cost on a large scale.
The content of the invention
The present invention is by with reference to the characteristics of special welding machine and welding robot, there is provided the high las er-guidance numerical control bonding machine of a kind of low production cost, high working efficiency, welding quality, realize the remote digital control of the irregular weld seam of heavy steel member, large area, multi-faceted, multi-angle, fast accurate is positioned, the automatic numerical control bonding machine of multilayer multiple tracks.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of automatic numerical control bonding machine, including body, chassis walking mechanism, slide plate elevating mechanism, cross beam movement mechanism and welding tractor motion；
The chassis walking mechanism includes walking mechanism and Slewing Support Mechanism, realizes the whole machine of welding along track travel and 360 ° of gyrations；Chassis walking mechanism is connected by Slewing Support Mechanism with the body of upper end；
The slide plate elevating mechanism is arranged on body side by chain lifting mechanism, and be connected thereon cross beam movement mechanism, drives beam vertical lifting moving；Slide plate elevating mechanism includes the main steel structure of slide plate, chain type lift drive mechanism and the balancing weight being connected by elevating chain with the main steel structure of slide plate；
The cross beam movement mechanism includes crossbeam and beam driving mechanism, and crossbeam is connected with the main steel structure of the slide plate, and beam driving mechanism realizes the horizontal reciprocating movement of crossbeam by Rack and gear transmission；
The welding tractor motion is assembled with crossbeam, realizes that dolly is moved in parallel along crossbeam by Rack and gear transmission, including welding tractor horizontal mobile mechanism and welding gun elevating mechanism.
Used as the prioritization scheme of the present invention, the chassis walking mechanism, slide plate elevating mechanism, cross beam movement mechanism and welding tractor motion are equipped with position sensor, and position sensor is connected by transmission line with controller.
Used as the prioritization scheme of the present invention, the slide plate elevating mechanism is provided with insurance anti-drop device, and insurance anti-drop device is linked by bearing pin with elevating chain.
As the prioritization scheme of the present invention, connected by longitudinally guiding wheel assembly between the main steel structure of the slide plate and body, to ensure that the main steel structure of slide plate is steadily moved on body.
As the prioritization scheme of the present invention, connected by laterally steering wheel assembly between the crossbeam and the main steel structure of slide plate, to ensure that crossbeam is steadily moved on the main steel structure of slide plate.
Used as the prioritization scheme of the present invention, the walking mechanism includes multiple road wheels and the hoofing part mechanism for arranging in front and back, and hoofing part mechanism drives road wheel to move along track, according to the adjustable welding scope of workpiece size.
Used as the prioritization scheme of the present invention, the Slewing Support Mechanism includes rotary motion mechanism and pivoting support, and rotary motion mechanism, by meshed transmission gear, realizes 360 ° of revolutions of the whole machine of welding with revolving support；The pivoting support bottom is connected with walking mechanism, and top is connected by a chassis with body.
Used as the prioritization scheme of the present invention, the hoofing part mechanism, rotary motion mechanism, chain type lift drive mechanism, beam driving mechanism are driven using servo-drive system.
Used as the prioritization scheme of the present invention, the welding tractor horizontal mobile mechanism, by Rack and gear transmission, realizes that welding tractor is moved in parallel along crossbeam by servomotor；Welding gun elevating mechanism is realized the elevating movement of welding gun by servomotor by the worm drive of lead screw pair.
Used as the prioritization scheme of the present invention, the leading screw end of the lead screw pair is provided with a link plate, and tracker is provided with the link plate, and tracker is connected with wig-wag, and welding gun is arranged on the wig-wag by clamping apparatus；The clamping apparatus adopt three-dimensional fine-tuning clamping apparatus, and achievable welding gun is up and down and rotary motion.
The invention has the beneficial effects as follows：
1st, the invention provides a kind of low cost, high efficiency, high-quality bonding machine, realize the remote digital control of the irregular weld seam of heavy steel member, large area, multi-faceted, multi-angle, multi-layer multi-pass welding, and by realizing that fast accurate is positioned in kinematic pair set location inductor, different types of welding type can be recognized, with extensive adaptability；
2nd, motion of the invention is driven using servo-drive system, welding current and speed of welding can be automatically adjusted according to different work demand, while ensure that the stationarity and continuity of welding；
3rd, the insurance anti-drop device with fall arrest, when crossbeam occurs accidental falling, can effectively prevent crossbeam from falling accidents caused, with good safety protection function；
4th, column and beam structure are reasonable, rigid good, and the flexible degree of disturbing of crossbeam is little, make crossbeam that the welding of long-time stable is can still provide for when in high-order and collapsing length maximum, are not in vibrate；
5th, weld scope big, can multiple gun weld simultaneously, high degree of automation.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is chassis walking mechanism structural representation in the present invention；
Fig. 3 is middle slide plate elevating mechanism structural representation of the present invention；
Fig. 4 is chain lifting mechanism structural representation in the present invention；
Fig. 5 is middle cross beam travel mechanism of the present invention structural representation；
Fig. 6 is welding tractor motion structural representation in the present invention；
Fig. 7 is the general assembly drawing of the present invention；
In figure：I- bodies，II- chassis walking mechanism，III- slide plate elevating mechanisms，IV- cross beam movements mechanism，V- welding tractor motions，1- road wheels，2- hoofing parts mechanism，3- rotary motion mechanisms，4- pivoting supports，5- counterweights are fast，The main steel structure of 6- slide plates，7- longitudinally guiding wheel assemblies，8- beam driving mechanisms、9- welding tractor horizontal mobile mechanisms，10- welding gun elevating mechanisms，11- insures anti-drop device，12- chain lifting mechanisms，13- lift drive mechanisms，14- elevating chains，15- crossbeams drive servomotor，16- crossbeams drive reductor，17- crossbeam drive gears、18- laterally steering wheel assemblies，19- crossbeams，20- dolly directive wheels，21- lead screw pair，22- welding guns drive reductor，23- welding guns drive servomotor，24- dollies drive servomotor，25- dollies drive reductor，26- dolly drive gears，27- welding guns，28- leading screws，29- link plates，30- trackers，31- wig-wags，A- walking mechanisms，B- Slewing Support Mechanisms.
Specific embodiment
The present invention and its effect are further elaborated below in conjunction with drawings and Examples.
As shown in Fig. 1,7, a kind of automatic numerical control bonding machine, including body I, chassis walking mechanism II, slide plate lifting mechanism I II, cross beam movement mechanism IV, welding tractor motion V；
As shown in Fig. 2 chassis walking mechanism II includes walking mechanism A and Slewing Support Mechanism B, the whole machine of welding is realized along track travel and 360 ° of gyrations, for controlling the position in the X-axis direction of welding gun 27；Wherein, walking mechanism A includes multiple road wheels 1 and the hoofing part mechanism 2 for arranging in front and back, and hoofing part mechanism 2 is connected by gear drive with the wheel shaft of road wheel 1, drives the orbital motion of road wheel 1；Slewing Support Mechanism B includes rotary motion mechanism 3 and pivoting support 4, and rotary motion mechanism 3 is connected 360 ° to control to weld whole machine with swiveling gear transmission mechanism by meshed transmission gear, i.e. rotary servovalve motor output end with revolving support 4 and is turned round；The bottom of pivoting support 4 is connected with walking mechanism A, and top is connected with body I；Welding scope can quickly be adjusted according to workpiece size.
As shown in Figure 3, slide plate lifting mechanism I II is arranged on body I sides by the chain lifting mechanism 12 that lifting is steady, uniform, safety coefficient is high, be connected thereon cross beam movement mechanism IV, the vertical lift movement of crossbeam 19 is driven, for controlling the position in the Z-axis direction of welding gun 27；The balancing weight 5 that slide plate lifting mechanism I II is included the main steel structure 6 of slide plate, chain type lift drive mechanism 13 and is connected by elevating chain 14 with the main steel structure 6 of slide plate；Wherein, as shown in figure 4, chain lifting mechanism 12 includes chain type lift drive mechanism 13 and elevating chain 14, the vertical displacement movement of the main steel structure 6 of slide plate is realized by Rack and gear transmission, the even running of body is ensured by balancing weight 5；Connected by longitudinally guiding wheel assembly 7 between the main steel structure 6 of slide plate and body I, to ensure that the main steel structure 6 of slide plate is steadily moved on body I.Slide plate lifting mechanism I II is provided with insurance anti-drop device 11, and insurance anti-drop device 11 is linked by bearing pin with elevating chain 14.It is by anticreep beam, hook, tensioning spring and the erecting in sled mechanism III into by tensioning spring connection between elevating chain 14 and hook, when elevating chain 14 ruptures, hook is balanced on the anticreep beam that beam pressure is suspended on body；Insurance anti-drop device 11 can effectively prevent and treat crossbeam 19 and drop, and potential safety hazard be eliminated, with good safety protection function.
As shown in Figure 5, cross beam movement mechanism IV includes crossbeam 19 and beam driving mechanism 8, it is connected by laterally steering wheel assembly 18 between the crossbeam 19 and the main steel structure 6 of slide plate, to ensure that crossbeam 19 is steadily moved on the main steel structure 6 of slide plate, laterally steering wheel assembly 18 is connected by bolt with the main steel structure 6 of slide plate；Beam driving mechanism 8 includes that the crossbeam being sequentially connected drives servomotor 15, crossbeam to drive reductor 16 and crossbeam drive gear 17, by high transmission accuracy, without creeping, the Rack and gear transmission of non-jitter, the horizontal reciprocating movement of crossbeam 19 is realized, and then controls the position in the Y-axis direction of welding gun 27.Described motor is electrodeless servomotor, and its speed-regulating range width operates steadily, and has overvoltage, excessively stream, overload and overheated multiple protective.
As shown in Figure 6, welding tractor motion V is arranged on crossbeam 19, realize that dolly is moved in parallel along crossbeam 19 by Rack and gear transmission, including welding tractor horizontal mobile mechanism 9 and welding gun elevating mechanism 10, for finely tuning position of the welding gun 27 in Y-axis and Z-direction.Welding tractor horizontal mobile mechanism 9 includes that dolly drives servomotor 24, dolly to drive reductor 25, dolly drive gear 26, by Rack and gear transmission, realizes that dolly directive wheel 20 is steadily mobile along crossbeam 19；Welding gun elevating mechanism 10 includes that welding gun drives servomotor 23, welding gun to drive reductor 22, lead screw pair 21, and the elevating movement of welding gun 27 is realized by the worm drive of lead screw pair 21 by servomotor；The end of leading screw 28 of lead screw pair 21 is provided with a link plate 29, and tracker 30 is provided with the link plate 29, and tracker 30 is connected with wig-wag 31, and welding gun 27 is arranged on the wig-wag 31 by clamping apparatus；The clamping apparatus adopt three-dimensional fine-tuning clamping apparatus, realize welding gun 27 up and down and rotary motion.
Chassis walking mechanism II, slide plate lifting mechanism I II, cross beam movement mechanism IV and welding tractor motion V are equipped with position sensor, position sensor is connected by transmission line with controller, by controller processing position information, further issue an instruction to the exact position of welding gun, accurate to weld seam, comprehensive positioning can be realized, different types of welding type can be recognized, weld job scope is big, can multiple gun weld simultaneously, high degree of automation, with extensive adaptability.
Hoofing part mechanism 2, rotary motion mechanism 3, chain type lift drive mechanism 13, beam driving mechanism 8 are driven using servo-drive system in the present invention, different speeds of welding can be realized according to different work demand, while ensure that the stationarity and continuity of welding.
Welding workpiece is fixedly mounted in welding range areas when in use, it is same to cross walking mechanism A, revolving support B and beam driving mechanism 8 are adjusting the position relationship all around of crossbeam opposite piece, again the at the uniform velocity elevating movement of slide plate elevating mechanism III is driven by chain lifting mechanism 12, this operation can be suspended when welding gun 27 is be close to position to be welded, the relative position relation up and down of welding gun 27 and workpiece weld seam to be welded is finely tuned come wireless remote control by the welding gun elevating mechanism 10 on welding tractor V, when the bonding machine provided by the present invention can solve single cambered surface welding, when weld seam is can't see on opposite, the position relationship of welding gun and weld seam can be adjusted by wireless remote control handle to opposite, it is finally completed the welding procedure of complexity.After the completion of a workpiece welding to be welded, walking mechanism A continues to go ahead, to next workpiece to be welded, it is not necessary to crossbeam of walking is laterally adjusted again, and easy to operate, positioning is rapid, high working efficiency, welds strong adaptability, and stability is good.
Above example is only exemplary, can't limit to the present invention, it should be pointed out that for a person skilled in the art, and under technology provided by the present invention enlightenment, other equivalent modifications made and improvement are regarded as protection scope of the present invention.
Claims (10)
1. a kind of automatic numerical control bonding machine, it is characterised in that：Including body (I), chassis walking mechanism (II), slide plate elevating mechanism (III), cross beam movement mechanism (IV) and welding tractor motion (V)；
The chassis walking mechanism (II) includes walking mechanism（A）And Slewing Support Mechanism（B）, realize the whole machine of welding along track travel and 360 ° of gyrations；Chassis walking mechanism (II) passes through Slewing Support Mechanism（B）It is connected with the body (I) of upper end；
The slide plate elevating mechanism (III) passes through chain lifting mechanism（12）Installed in body (I) side, be connected thereon cross beam movement mechanism (IV), drives crossbeam（19）Vertical lift movement, slide plate elevating mechanism (III) includes the main steel structure of slide plate（6）, chain type lift drive mechanism（13）And with the main steel structure of slide plate（6）By elevating chain（14）The balancing weight of connection（5）；
The cross beam movement mechanism (IV) includes crossbeam（19）And beam driving mechanism（8）, crossbeam（19）With the main steel structure of the slide plate（6）It is connected, beam driving mechanism（8）By Rack and gear transmission, crossbeam is realized（19）Horizontal reciprocating movement；
The welding tractor motion (V) and crossbeam（19）Assembling, realizes dolly along crossbeam by Rack and gear transmission（19）Move in parallel, including welding tractor horizontal mobile mechanism（9）With welding gun elevating mechanism（10）.
2. a kind of automatic numerical control bonding machine according to claim 1, it is characterised in that：The chassis walking mechanism (II), slide plate elevating mechanism (III), cross beam movement mechanism (IV) and welding tractor motion (V) are equipped with position sensor, and position sensor is connected by transmission line with controller.
3. a kind of automatic numerical control bonding machine according to claim 1, it is characterised in that：The slide plate elevating mechanism (III) is provided with insurance anti-drop device（11）, insure anti-drop device（11）By bearing pin and elevating chain（14）Link.
4. according to a kind of arbitrary described automatic numerical control bonding machine of claim 1-3, it is characterised in that：The main steel structure of the slide plate（6）With body（I）Between pass through longitudinally guiding wheel assembly（7）Connection, to ensure the main steel structure of slide plate（6）In body（I）It is upper steady mobile.
5. according to a kind of arbitrary described automatic numerical control bonding machine of claim 1-3, it is characterised in that：The crossbeam（19）With the main steel structure of slide plate（6）Between pass through laterally steering wheel assembly（18）Connection, to ensure crossbeam（19）In the main steel structure of slide plate（6）It is upper steady mobile.
6. a kind of automatic numerical control bonding machine according to claim 1, it is characterised in that：The walking mechanism（A）The multiple road wheels arranged including before and after（1）With hoofing part mechanism（2）, hoofing part mechanism（2）Drive road wheel（1）Along track movement, according to the adjustable welding scope of workpiece size.
7. a kind of automatic numerical control bonding machine according to claim 1, it is characterised in that：The Slewing Support Mechanism（B）Including rotary motion mechanism（3）And pivoting support（4）, rotary motion mechanism（3）With revolving support（4）By meshed transmission gear, 360 ° of revolutions of the whole machine of welding are realized；The pivoting support（4）Bottom and walking mechanism（A）It is connected, top is by a chassis and body（I）It is connected.
8. a kind of automatic numerical control bonding machine according to claim 6 or 7, it is characterised in that：The hoofing part mechanism（2）, rotary motion mechanism（3）, chain type lift drive mechanism（13）, beam driving mechanism（8）Driven using servo-drive system.
9. a kind of automatic numerical control bonding machine according to claim 1, it is characterised in that：The welding tractor horizontal mobile mechanism（9）By servomotor by Rack and gear transmission, realize welding tractor along crossbeam（19）Move in parallel；Welding gun elevating mechanism（10）Lead screw pair is passed through by servomotor（21）Worm drive realize welding gun（27）Elevating movement.
10. a kind of automatic numerical control bonding machine according to claim 9, it is characterised in that：The leading screw of the lead screw pair 21（28）End is provided with a link plate（29）, the link plate（29）On be provided with tracker（30）, tracker（30）With wig-wag（31）It is connected, welding gun（27）The wig-wag is arranged on by clamping apparatus（31）On；The clamping apparatus adopt three-dimensional fine-tuning clamping apparatus, are capable of achieving welding gun（27）Up and down and rotary motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510653207.3A CN106563902A (en) | 2015-10-12 | 2015-10-12 | Automation numerical control welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510653207.3A CN106563902A (en) | 2015-10-12 | 2015-10-12 | Automation numerical control welding machine |
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| CN106563902A true CN106563902A (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510653207.3A Pending CN106563902A (en) | 2015-10-12 | 2015-10-12 | Automation numerical control welding machine |
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| CN (1) | CN106563902A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107214451A (en) * | 2017-06-23 | 2017-09-29 | 扬州力德工程技术有限公司 | A kind of mechanical guide formula automatic welding device |
| CN108500533A (en) * | 2018-06-05 | 2018-09-07 | 苏州光彩建筑钢品有限公司 | A kind of close-coupled welding gun installing mechanism |
| CN108817590A (en) * | 2018-06-26 | 2018-11-16 | 广东恒基金属制品实业有限公司 | A kind of automatic welding equipment and welding method |
| CN110227895A (en) * | 2019-06-17 | 2019-09-13 | 陈进花 | A kind of railway inspection trolley |
| CN113427105A (en) * | 2021-07-08 | 2021-09-24 | 中铁工程装备集团有限公司 | Shield body welding system of shield machine |
| CN118060604A (en) * | 2024-04-18 | 2024-05-24 | 常州中昇工具有限公司 | Combined ladder milling cutter for machining automobile crankshafts |
| CN118060604B (en) * | 2024-04-18 | 2024-07-05 | 常州中昇工具有限公司 | Combined ladder milling cutter for machining automobile crankshafts |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107214451A (en) * | 2017-06-23 | 2017-09-29 | 扬州力德工程技术有限公司 | A kind of mechanical guide formula automatic welding device |
| CN108500533A (en) * | 2018-06-05 | 2018-09-07 | 苏州光彩建筑钢品有限公司 | A kind of close-coupled welding gun installing mechanism |
| CN108817590A (en) * | 2018-06-26 | 2018-11-16 | 广东恒基金属制品实业有限公司 | A kind of automatic welding equipment and welding method |
| CN110227895A (en) * | 2019-06-17 | 2019-09-13 | 陈进花 | A kind of railway inspection trolley |
| CN110227895B (en) * | 2019-06-17 | 2021-06-08 | 广东华能机电有限公司 | Railway maintenance trolley |
| CN113427105A (en) * | 2021-07-08 | 2021-09-24 | 中铁工程装备集团有限公司 | Shield body welding system of shield machine |
| CN118060604A (en) * | 2024-04-18 | 2024-05-24 | 常州中昇工具有限公司 | Combined ladder milling cutter for machining automobile crankshafts |
| CN118060604B (en) * | 2024-04-18 | 2024-07-05 | 常州中昇工具有限公司 | Combined ladder milling cutter for machining automobile crankshafts |
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Application publication date: 20170419 |
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