CN103302440B - Detachably combined supporting device for large tube processing - Google Patents

Detachably combined supporting device for large tube processing Download PDF

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Publication number
CN103302440B
CN103302440B CN201310265914.6A CN201310265914A CN103302440B CN 103302440 B CN103302440 B CN 103302440B CN 201310265914 A CN201310265914 A CN 201310265914A CN 103302440 B CN103302440 B CN 103302440B
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CN
China
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support
adjustable
living
shell
bracing
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CN201310265914.6A
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Chinese (zh)
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CN103302440A (en
Inventor
刘红枫
满涵
杨立业
邓冬阳
黄浩
娄慧杰
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中国有色(沈阳)冶金机械有限公司
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Publication of CN103302440A publication Critical patent/CN103302440A/en
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Publication of CN103302440B publication Critical patent/CN103302440B/en

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Abstract

A detachably combined supporting device for large tube processing belongs to the technical field of auxiliary processing equipment for ball mill tubes of large rotary equipment. The invention provides the detachably combined supporting device for large barrel processing. During the test production, the use effect is good, and technical guarantee for high-quality, high-efficiency and low-cost tube processing is provided. The device comprises an adjustable movable supporting device and a roundness supporting device, wherein the adjustable movable supporting device comprises adjustable movable supports and a detachable inclined support, the detachable inclined support is arranged between two opposite adjustable movable supports, the roundness supporting device comprises tube roundness support frames and two tube opening adjustable movable supports, the two tube opening adjustable movable supports are respectively arranged at a feeding end and a discharging end of the tube, the tube roundness support frames are positioned between the two tube opening adjustable movable supports, and at least one tube roundness support frame is arranged in each tube section.

Description

Large-size cylinder body processes detachable combined support device

Technical field

the invention belongs to the additional processing equipment technical field of rotation equipment ball mill barrel, specifically, relate to a kind of large cylinder apparatus for rotating middle cylinder bodies such as metallurgy, the various rotary kiln of mine class, grinding machine, mixer that are widely used in roll effect shape, turn the improvement of deformation-preventing supporting device structure of sequence, cylindrical shell and shell flange, wheel belt process.

Background technology

ball mill is one of large-scale mill, broken equipment, is widely used in mining processing industry.Its structure is primarily of barrel, to ore deposit portion, ore discharge portion, bearing portion, driving section and lubricating system six part composition; Its operation principle is that motor drives the barrel body rotation of rotating part by driving section, abrasive media-the steel ball be contained in cylindrical shell moves to certain altitude under frictional force and centrifugal action, then leave by certain linear velocity, ore is by the shock of whereabouts steel ball, and by between steel ball and steel ball, and additional crushing between steel ball and grinding machine and mill stripping effect and pulverize, and by means of the impulse force of water, the qualified material ground is sent outside cylindrical shell.Cylindrical shell is as the main huge revolving parts of driving section, and the workmanship of its cylindrical shell directly affects work quality and the service life of grinding machine, also determines the key of grinding machine integral device continuous and stable running.

in recent years, along with the maximization of grinding machine kind equipment master-plan specification and complicated, there is higher requirement to the manufacture of grinding machine entirety and crudy.Therefore, keeping shell rolling, turn circularity in sequence, cylindrical turning process and distortion, is the prerequisite determining under Mill Working state whether continuous and stable running.At present, existing large-sized grinding mill barrel diameter reaches φ=6500mm, and cylindrical shell effective length is L=9000mm.Along with the increase of barrel diameter, the increase of length, the equipment that cylindrical shell processing uses also is tending towards maximizing, and the purchasing price of main equipment is expensive, virtually improves cylindrical shell processing cost; Simultaneously because the circularity of cylindrical shell manufacture directly affects the overall turning course rotating speed of grinding machine, therefore the manufacturing issue of cylindrical shell is the bottleneck problem urgently to be resolved hurrily that current grinding machine manufactures.

shell ring is the elementary cell of composition cylindrical shell, and it is by the steel plate of δ=40-60mm think gauge, is welded after pre-roll-forming; Cylindrical shell it be by several welding fabrications after shell ring jointing form, be welded with stiff end flange at the two ends of cylindrical shell, end flanges is connected with the charging and discharging portion at two ends, left and right respectively, forms unified revolution overall.Cylindrical shell is as parts maximum in ball mill, pivoting part, the Optimal Structure Designing of its a series of large-scale combined anti-deformation tool in the processing of the jointing of the rolling of shell ring, cylindrical shell, end flanges, cylindrical shell handling, process of transfer order, the reasonability of use and the economy of manufacture, directly affect the work quality of grinding machine, service life and manufacturing cost, therefore each link of a strict application cylinder body shell ring manufacturing process is most important.

in the past in the manufacture process of cylindrical shell, the process that the group vertical position welding between the welding of single shell ring, shell ring is connected into cylindrical shell completes at welding shop, usually uses the combined support tool of customization, is namely only limitted to that combination that specific standard cylindrical shell uses is fixing deadly to be supported.Such as, shell ring is after steel plate rolls welding fabrication in advance, and roll backward pull for preventing steel plate and act on shell ring and be welded to connect place, weld seam causes fracture by tension force effect, and ensure the circularity requirement of prefabricated shell ring, need to make fixing rice word bracing or strutting arrangement and be welded on shell ring inwall.Stand in (referring to the Combination Welding between connected shell ring) process in the jointing group of cylindrical shell, because single shell ring height is about 2-3 rice, single shell ring weld seam is straight bead, adopt rice word to support and prevent distortion, but shell ring is the combination assembly welding process of single shell ring in group immediately, weld seam is the circular weld of circumference, therefore organizes the shell ring after standing and likely can produce distortion; After the vertical position welding of cylindrical shell jointing group connects large section joint, by whole cylindrical shell handling to next procedure, carry out welding and the processing of flange, at this moment need the supporter welded before all to slice off, remove.Due to rice word be supported on design time, consider stiff problem, whole employing] 20a channel-section steel is assemblied to form, the rice word supported weight of φ=6500mm reaches more than 1 ton, dismantling in the process of cutting off, gas flame cuttiug can only be adopted to carry out destructiveness cutting, and the rice word after dismounting supports and can not reuse, and waste is serious; Simultaneously due in cutting process, the high temperature of flame forms selective hardening to cylinder inner surface, makes cylindrical shell stress raisers, produces distortion, has had a strong impact on the inherent quality of product.

when group stand into cylindrical shell shaping after, processing mode there occurs change, the machining of the lathe of cylindrical shell is become by original shell ring welding processing, for ensureing that cylindrical shell needs at the turnery processing of end face of flange and cylindrical and location, original distortion-free fixing dead support can not meet present processing request, therefore adopts a kind of bracing or strutting arrangement of new structure.Now, this bracing or strutting arrangement is welded on the side of cylindrical shell, and cylindrical shell one end is fixed on large-scale lathe-head by the dead head on bracing or strutting arrangement, the other end utilizes the Finial device of tailstock tool, firmly be connected top with bracing or strutting arrangement, form one, carry out the Excircle machining of end flanges.After machining, need to utilize artificial gas flame cuttiug, the bracing or strutting arrangement be welded is cut away; This process, is repeated above-mentioned breakoff phenomenon, and the bracing or strutting arrangement after cutting is without any value, and waste is serious, and production efficiency is low.

Summary of the invention

for effectively solving many bottleneck problems of above-mentioned restriction large-size cylinder body manufacture process, improve product manufacturing quality and working (machining) efficiency, reduce production cost, grope to accumulate with field experience through practice for many years, the invention provides a kind of large-size cylinder body and process detachable combined support device, this combined support device is in test is produced, and result of use is good, for the cylindrical shell processing of high-quality, high efficiency, low cost provides technical guarantee.

for realizing above-mentioned purpose of the present invention, the present invention adopts following technical scheme.

the present invention includes adjustable bracing or strutting arrangement alive and circularity bracing or strutting arrangement, its structural feature is: described bracing or strutting arrangement adjustable alive is made up of adjustable support alive and detachable bearing diagonal, and detachable bearing diagonal is arranged between two relative adjustable supports alive; Described support adjustable alive comprises and is fixedly connected with dish, is fixedly connected with centered by dish by this, dish is provided with some connections in dispersion shape supports being fixedly connected with, and adjacent two to connect the angle supported equal, connects to support to coil by bolt closing with being fixedly connected with; The outer end connecting support is provided with slip locating piece by bolt the mode of closing, the outer end of slip locating piece is provided with and regulates arc plate, regulating the groove of arc plate and slip locating piece side to adopt interference fits, being also provided with fine setting jackscrew regulating the both sides of arc plate; Described detachable bearing diagonal is made up of the bearing diagonal connecting plate at the first support bar and the first support bar two ends, and two bearing diagonal connecting plates are separately positioned on the mode of closing by bolt the outer end being positioned at the two connection supports that same plane parallels.

described circularity bracing or strutting arrangement is made up of cylinder roundness bracing frame and the adjustable support alive of nozzle, the adjustable work of described nozzle is supported with two, be separately positioned on feed end and the discharge end of cylindrical shell, described cylinder roundness bracing frame between the adjustable support alive of two nozzles, and at least arranges a cylinder roundness bracing frame in each shell ring; Cylinder roundness bracing frame comprises locating ring and center terminal pad, is fixedly installed connecting plate between locating ring and center terminal pad, and the angle between adjacent two connecting plates is equal, circumferentially the mode of spot welding is provided with some overlap joint blocks at locating ring; The adjustable support alive of described nozzle comprises central term dish, the adjustable center of living support of each nozzle is provided with a corresponding dead head top to tailstock tool on taking over a business, center is fixedly installed four the second support bars on taking over a business, adjacent two second support bars are vertical, are provided with the locating piece having and regulate jackscrew in the outer end of each second support bar.

particularly, the described dish that is fixedly connected with adopts the steel plate of δ=50mm to make, and has joint hole, for the connection of closing dispersion shape is supported being fixedly connected with on dish; [16a channel-section steel is made, and slip locating piece is embedded in the groove of described channel-section steel to connect support employing.

more specifically, the first described support bar is four, be respectively connect be positioned at that same plane parallels two connect two that support outer ends, and connect be positioned at that the plane vertical with aforesaid plane parallel two be connected two that support outer end.Shell ring is vertically and radial direction in group distortion immediately, two independent adjustable live support between add detachable bearing diagonal, solve drum shaft to problem on deformation; Radial deformation must be realized by addition of constraints, regular situation be retrain more, be out of shape less, but cross multiple constraint can cause supporting the difficulty regulated with cylindrical shell Contact, simultaneously because unbalance stress causes supporting deformation, four braces constrain the four direction of circumference, and not only meet resistance to deformation requirement but also simple, time-proven effect is best.

when cylindrical shell is made up of four shell rings, described bracing or strutting arrangement adjustable alive is made up of four adjustable supports alive and a detachable bearing diagonal; Before shell ring group is vertical, the adjustable middle part supporting and be arranged at each shell ring of living, after shell ring group is vertical, adjustable the living only retained in head and the tail two shell rings supports; Described circularity bracing or strutting arrangement is made up of two cylinder roundness bracing frames and four adjustable supports alive of nozzle, arranges a cylinder roundness bracing frame in each shell ring.

through the accumulation of repetition test and practical experience, the barrel distortion in turnery processing stage can the most effectively be offset and prevent to confirmation such as under type, namely when single length of cylindrical shell sections is: during L+L1+L2=2000-2500mm, circularity bracing frame is best in the position of shell ring apart from single shell ring girth welding edge L2=300mm, L is the adjustable distance supported between circularity bracing frame of living of nozzle, L1 is the distance between circularity bracing frame and nozzle end flanges, is generally 300mm.

compared with prior art beneficial effect of the present invention.

(1) reduction cylindrical shell processing cost: the rice word that the former shell ring welding process of NFC (Shenyang) Metallurgical Machinery Co., Ltd. adopts supports, fix lacing wire in dead support and cylindrical shell is disposable support, design above-mentioned support material therefor weight and be about 1.5 tons, the production cost of the normal tonnage of company is 10,000 yuan/ton, generation expense about 1.5 ten thousand yuan, now annual production smelting is for product middle cylinder body quantity about 100/year, total cost occurs be: 100 × 1.5 ten thousand yuan=1,500,000 yuan; After adopting adjustable support, design above-mentioned support material therefor weight and be about 0.5 ton, the production cost of the normal tonnage of company is 10,000 yuan/ton, generation expense about 0.5 ten thousand yuan, because company's smelting is not very large for production specifications vary, different regulation cylindrical shell processing needs just can be met by regulating various support, such cylindrical shell processing supported design reduces 2/3, generation total cost is: 100 × 1/3 × 0.5 ten thousand yuan=16.67 ten thousand yuan, reduce costs every year into: 1,500,000 yuan-16.67 ten thousand yuan=133.33 ten thousand yuan.

(2) simplify procedure: decrease the welding of shell ring support and cut and reconditioning operation, living and support the use of dead head, decrease the tube roller mill time of turning process, simplify cylindrical shell processing.

(3) improve cylindrical shell crudy: avoid and cut off in the process of original bracing or strutting arrangement in dismounting, the high temperature of flame forms selective hardening to cylinder inner surface, makes cylindrical shell stress raisers, the distortion of generation; And on cylinder inboard wall, remain the removal problem of solder joint; Even due to contingent operate miss, the quality problems that cutting too much needs repair welding to produce.

Accompanying drawing explanation

fig. 1 is the structural representation of the adjustable bracing or strutting arrangement alive of the present invention.

in figure, 1 be adjustable bracing or strutting arrangement alive, 2 for adjustable live support, 3 be detachable bearing diagonal, 4 for being fixedly connected with dish, 5 for connecting support, 6 being the first support bar.

fig. 2 is the partial enlarged drawing of Fig. 1.

in figure, 7 is regulate arc plate, 8 to be bearing diagonal connecting plate for fine setting jackscrew, 9 is slip locating piece, 10.

fig. 3 is after jointing group is stood, the schematic diagram that cylindrical shell combines with adjustable bracing or strutting arrangement alive.

fig. 4 is the structural representation of circularity bracing frame of the present invention.

in figure, 12 be terminal pad centered by cylinder roundness bracing frame, 13,14 for locating ring, 15 for connecting plate, 16 for overlap joint block.

fig. 5 is the adjustable structural representation supported of living of nozzle of the present invention.

in figure, 17 live for nozzle is adjustable supports, take over a business centered by 18,19 be locating piece for dead head, 20 is the second support bar, 21 for regulating jackscrew, 22.

fig. 6 is the structural representation that circularity bracing or strutting arrangement of the present invention combines with cylindrical shell.

fig. 7 is the A-A sectional view of Fig. 6.

in figure, 11 be shell ring, 23 be cylindrical shell, 24 be circularity bracing or strutting arrangement, 25 be flange, 26 for circumferential weld.

Detailed description of the invention

the present invention includes adjustable bracing or strutting arrangement alive 1 and circularity bracing or strutting arrangement 24.Shell ring 11 rolls use, turn sequence bracing or strutting arrangement 1 adjustable alive primarily of adjustable support 2 alive and detachable bearing diagonal 3 two parts composition, adjustable support alive 2 rolls use for single shell ring 11, combine with detachable bearing diagonal 3, use for shell ring 11 jointing, group immediately.

being fixedly connected with dish 4 adopts δ=50m steel plate to be made.Be fixedly connected with on dish 4 and be designed with special joint hole, for the connection of closing dispersion shape is supported 5, connect support 5 and adopt [16a channel-section steel manufacture; Select the key of channel-section steel to be both to have alleviated the weight connecting support 5, slip locating piece 9 can be inlayed in the groove of channel-section steel again; The position of slip locating piece 9 is determined according to shell ring 11 internal diameter specification, and channel-section steel, slip locating piece 9 form Unified Global by bolt conjunction.Slip locating piece 9 upper end is designed with the groove consistent with regulating arc plate 7, arc plate 7 and groove is regulated to adopt interference fits, be about to regulate arc plate 7 to be plugged in the groove at slip locating piece 9 top, adjustment arc plate 7 is made to be positioned on slip locating piece 9, regulate arc plate 7 and the adjustment of the contact position of cylindrical shell 23 inwall, adopt fine setting jackscrew 8 to realize.When single shell ring 11 rolls after welding completes, by adjustable support 2 alive by prefabricated cylindrical shell 23 internal diameter size, adjusting, be positioned in cylindrical shell 23, by finely tuning the fine setting effect of jackscrew 8, realizing the best fit of cylindrical shell 23 inwall and adjustable bracing or strutting arrangement alive 1.

when shell ring 11 carries out jointing group immediately, at this moment single bracing or strutting arrangement 1 adjustable alive can not meet jointing group and found rear cylinder body 23 roundness control needs; Because each shell ring 11 height is at 2-3 rice, whole cylindrical shell 23 generally forms by 4 shell ring 11 jointing groups are vertical, therefore to control jointing group and found rear cylinder body 23 circularity, remove the support 2 adjustable alive in central two shell rings 11, design between the support 2 adjustable alive in head and the tail two shell rings 11 and detachable bearing diagonal 3 is set, first support bar 6 and the connection being weldingly fixed on dispersion shape of detachable bearing diagonal 3 support bearing diagonal connecting plate 10 on 5 closing, form stable connection support.

after whole cylindrical shell 23 has welded, by being welded in the process of transfer order of turnery processing, for preventing cylindrical shell 23 from transporting distortion, need, with adjustable bracing or strutting arrangement 1 alive, cylindrical shell 23 is transported to next procedure; Before the flange 25 carrying out cylindrical shell 23 is processed, by dismantling the connecting bolt on adjustable bracing or strutting arrangement alive 1, the dismounting such as arc plate 7, slip locating piece 9 will be regulated, in order to reusing.

circularity bracing or strutting arrangement 24 during cylindrical shell 23 flange 25 turnery processing primarily of: be made up of cylinder roundness bracing frame 12 and adjustable support 17 two parts alive of nozzle.Because cylindrical shell 23 has welded rear length, to reach 9000mm many, for guaranteeing that cylindrical shell 23 is in major part Tutrning Process, each shell ring 11 circularity avoid cylindrical shell 23 stress deformation, each shell ring 11 adopts a cylinder roundness bracing frame 12, and it is made up of center terminal pad 13, connecting plate 15, locating ring 14, overlap joint block 16 4 part.Before turnery processing, locating ring 14 diameter is selected according to cylindrical shell 23 diameter, follow following principle under normal circumstances: φ locating ring=φ barrel diameter-100 mm, locating ring 14 realizes by overlapping block 16 with the connection of cylindrical shell 23 inwall, by the specification of adjustment overlap joint block 16, realize the support anti-deformation effect of different cylindrical shell 23 internal diameter cylinder roundness bracing frame 12.After being accumulated by practical experience, confirm the most effectively offset as under type and prevent turnery processing to be out of shape, that is: when single shell ring 11 length is: L+L1+L2=(2000-2500) mm, the putting position of cylinder roundness bracing frame 12 is apart from single shell ring 11 circumferential weld 26 welding edge place L2=300mm.

the adjustable support 17 alive of nozzle primarily of: center takes over a business 18, dead head 19, second support bar 20, regulate jackscrew 21, part such as locating piece 22 grade forms, 18 Centers are taken over a business at center consistent dead head 19 top with tailstock tool, second support bar 20 and center take over a business 18 weld formed one, second support bar 20 structure adopts square steel, the long screwed hole of tip designs, jackscrew 21 is regulated to form one by screw thread and the second support bar 20, and the change by regulating screw thread to realize adjustable support 17 diameter alive of nozzle, for preventing the adjustable support 17 alive of nozzle at Tutrning Process, by cutting force effect generation axial displacement, locating piece 22 is devised inside cylindrical shell 23, first locating piece 22 is welded on cylindrical shell 23 during use, after adjusting the position of the adjustable support 17 alive of nozzle, jackscrew 21 will be regulated locked, the cylindrical shell 23 be made up of four shell rings 11 arranges two adjustable supports 17 alive of nozzle, lays respectively at feed end and the discharge end of cylindrical shell.

be understandably, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.

Claims (5)

1. large-size cylinder body processes detachable combined support device, the present invention includes adjustable bracing or strutting arrangement alive (1) and circularity bracing or strutting arrangement (24), it is characterized in that:
Described bracing or strutting arrangement adjustable alive (1) is made up of adjustable support (2) alive and detachable bearing diagonal (3), and detachable bearing diagonal (3) is arranged on two relative adjustable living and supports between (2);
Described adjustable living supports (2) and comprises and be fixedly connected with dish (4), be fixedly connected with centered by dish (4) by this, dish (4) is provided with some connections in dispersion shape supports (5) being fixedly connected with, adjacent two connect that to support the angle of (5) equal, connect to support (5) with being fixedly connected with and coil (4) by bolt closing; The outer end connecting support (5) is provided with slip locating piece (9) by bolt the mode of closing, the outer end of slip locating piece (9) is provided with and regulates arc plate (7), regulating arc plate (7) to adopt interference fits with the groove of slip locating piece (9) side, being also provided with fine setting jackscrew (8) regulating the both sides of arc plate (7);
Described detachable bearing diagonal (3) is made up of the bearing diagonal connecting plate (10) at the first support bar (6) and the first support bar (6) two ends, and two bearing diagonal connecting plates (10) are separately positioned on the mode of closing by bolt the outer end being positioned at two connections support (5) that same plane parallels;
Described circularity bracing or strutting arrangement (24) is made up of cylinder roundness bracing frame (12) and the adjustable support (17) of living of nozzle, the adjustable support (17) of living of described nozzle has two, be separately positioned on feed end and the discharge end of cylindrical shell (23), described cylinder roundness bracing frame (12) is positioned at adjustable the living of two nozzles and supports between (17), and at least arranges a cylinder roundness bracing frame (12) in each shell ring (11);
Cylinder roundness bracing frame (12) comprises locating ring (14) and center terminal pad (13), connecting plate (15) is fixedly installed between locating ring (14) and center terminal pad (13), angle between adjacent two connecting plates (15) is equal, circumferentially the mode of spot welding is provided with some overlap joint blocks (16) at locating ring (14);
The adjustable support (17) of living of described nozzle comprises center and takes over a business (18), the adjustable center supporting (17) of living of each nozzle takes over a business on (18) to be provided with a corresponding dead head (19) top to tailstock tool, four the second support bars (20) are fixedly installed on center is taken over a business (18), adjacent two second support bars (20) are vertical, are provided with the locating piece (22) with adjustment jackscrew (21) in the outer end of each second support bar (20).
2. large-size cylinder body according to claim 1 processes detachable combined support device, it is characterized in that: the described dish (4) that is fixedly connected with adopts the steel plate of δ=50mm to make, there is joint hole being fixedly connected with on dish (4), for the connection of closing dispersion shape is supported (5); [16a channel-section steel is made, and slip locating piece (9) is embedded in the groove of described channel-section steel to connect support (5) employing.
3. large-size cylinder body according to claim 1 processes detachable combined support device, it is characterized in that: described the first support bar (6) is four, be respectively connect be positioned at that same plane parallels two connect two that support (5) outer ends, and connect be positioned at that the plane vertical with aforesaid plane parallel two be connected two that support (5) outer end.
4. large-size cylinder body according to claim 1 processes detachable combined support device, it is characterized in that: when cylindrical shell (23) is made up of four shell rings (11), described bracing or strutting arrangement adjustable alive (1) is made up of four adjustable supports (2) alive and a detachable bearing diagonal (3); Before shell ring (11) group is vertical, adjustable living supports the middle part that (2) are arranged at each shell ring (11), and after shell ring (11) group is vertical, adjustable the living only retained in head and the tail two shell rings (11) supports (2); Described circularity bracing or strutting arrangement (24) is made up of two cylinder roundness bracing frames (12) and four adjustable supports (17) of living of nozzle, arranges a cylinder roundness bracing frame (12) in each shell ring (11).
5. large-size cylinder body according to claim 4 processes detachable combined support device, it is characterized in that: when single shell ring (11) length is: during L+L1+L2=2000-2500mm, circularity bracing frame (12) in the position of shell ring (11) apart from single shell ring (11) circumferential weld (26) welding edge place L2=300mm, L is the adjustable distance supported between (17) and circularity bracing frame (12) of living of nozzle, and L1 is the distance between circularity bracing frame (12) and nozzle end flanges (25).
CN201310265914.6A 2013-06-28 2013-06-28 Detachably combined supporting device for large tube processing CN103302440B (en)

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CN105149858A (en) * 2015-08-21 2015-12-16 哈尔滨建成集团有限公司 Equal-diameter support device for cylinders formed by rolling steel plates
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CN105945498B (en) * 2016-06-29 2018-04-03 中国船舶重工集团公司第七一六研究所 A kind of assembly of Large Cylindric Shell and overturning welding platform
CN106334899A (en) * 2016-10-19 2017-01-18 苏州天沃科技股份有限公司 Cylinder rounding tool
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CN109623182A (en) * 2018-12-22 2019-04-16 江苏新宏大集团有限公司 Tank body bottom plate welding tooling and welding procedure

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