CN102886588A - Numerical control cutting process of steel tube arch bridge pipe joint steel plate intersecting line - Google Patents
Numerical control cutting process of steel tube arch bridge pipe joint steel plate intersecting line Download PDFInfo
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- CN102886588A CN102886588A CN2012103435824A CN201210343582A CN102886588A CN 102886588 A CN102886588 A CN 102886588A CN 2012103435824 A CN2012103435824 A CN 2012103435824A CN 201210343582 A CN201210343582 A CN 201210343582A CN 102886588 A CN102886588 A CN 102886588A
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Abstract
The invention relates to a numerical control cutting process of a steel tube arch bridge pipe joint steel plate intersecting line. The numerical control cutting process comprises a numerical control flame cutting machine and comprises the following steps that (1) a curve graph of the steel tube arch bridge pipe joint steel plate intersecting line is drawn through a geometric method and led into the numerical control flame cutting machine; (2) an angle turning device is installed at the numerical control flame cutting machine, and steering cutting of the numerical control flame cutting machine in four directions can be realized through the angle turning device; and (3) curve cutting of a required process groove containing welding is carried out on a steel plate so as to obtain parts which meet a requirement on an arch rib abutting joint curve. The numerical control cutting process has the advantages that firstly, the steel plate is formed by adopting numerical control cutting for one time, so that a production organization is smoother; secondly, raw materials are saved; thirdly, operating time that a welder carries out the welding is reduced; fourthly, a welded joint is uniform and attractive in appearance, fifthly, an integrated one-time cutting process is adopted, a working procedure is less, a cutting surface and a line are smooth and continuous, and quality is high, sixthly, the quality of a cut curve and a flame cutting surface are both improved, seventhly, the operating time that the welder carries out the welding is reduced, eighthly, production efficiency is high, and ninthly, working efficiency is improved.
Description
Technical field
The invention belongs to the science of bridge building structure steel fabrication, relate to steel pipe arch bridge arch rib tube coupling manufacture process light plate Numerical control cutting process, belong to the Numerical control cutting field.
Background technology
The making of steel pipe arch bridge arch rib curve is commonly used two kinds of methods: a kind of be by the straight tube joint to after being connected into and needing length, by fire bending is curved, make it be out of shape to reach the curve requirement, need to adopt the infrared ceramic electric-heating technology with special equipment during making; Another kind is to formulate corresponding technique according to designing requirement and manufacturer tube coupling is divided into to two meters left and right carries out steel plate cutting, rounding, cutting intersection, assembling etc. operation, thereby realizes the requirement of arch rib curve.Its method is that " with folding Dai Qu " mode meets the requirement of arch rib Curve Design, and this technique has the control of simply being easy to, flexible characteristics.But the curve controlled of steel pipe arch bridge is the key project of manufacturing process, directly affects construction quality, project progress and construction costs.The arch rib tube coupling is the elementary cell that forms arch, how to improve the curve quality of arch rib, meets consumers' demand to greatest extent.Such as: owing to being the required intersection of cutting after first rounding, and adopt the method for semi-automatic cutting, after its cutting, curve size and gas cutting face quality all have much room for improvement; Because cutting accuracy is not high, the tube coupling gap of assembling also can't guarantee the automatic welder(welding machine) welding process requirement simultaneously.
Summary of the invention
Purpose of design: avoid the weak point in background technology, a kind of steel pipe arch bridge tube coupling steel plate intersection Numerical control cutting technique is provided, steel pipe arch bridge arch rib curve quality problem and tube coupling crudy in existing technique have been solved, improve work efficiency, for the automatization level that promotes the steel pipe arch bridge manufacture lays the foundation.
Design: in order to realize above-mentioned purpose of design.The application is for problems such as in former technique " with folding Dai Qu " mode, tube coupling processing cutting accuracy are low, cut surface is rough, curve transition is not smoother, adopt new technology by steel plate being carried out to the once cutting of curve, guarantee the requirement of arch rib curve intersection, also can meet the requirement of welding procedure groove.Utilize the WD-105 NC flame cutting machine, the intersection curve map that will draw by geometric method (seeing accompanying drawing 1) also imports in numerical control cutting machine, then contains the cutting of groove, obtains and meets the part of process, thereby realize the requirement of arch rib tube coupling axial curve; And meet the robot automatic welding of circumferential seams and connect demand; Improve the groove cut lengths accurate simultaneously, improve assembling quality, guarantee the requirement of welding procedure.
Technical scheme: a kind of steel pipe arch bridge tube coupling steel plate intersection Numerical control cutting technique, comprise NC flame cutting machine, (1) draw the curve map of steel pipe arch bridge tube coupling steel plate intersection and import in NC flame cutting machine by geometric method, (2) at NC flame cutting machine, gyrator is housed, this gyrator can make NC flame cutting machine realize the cutting that turns to of four direction, (3) steel plate is contained to the curvilinear cut of welding required technique groove, can obtain meeting the part of arch rib docking curve requirement.
The present invention compares with background technology, and the one, adopt Numerical control cutting once to form, reduce 5～6 of operations, avoid the rod member inter process time of staying and reduce work-yard, make organization of production more smooth and easy; The 2nd, save material, by applying in the actual production at 136 meters steel pipe arch bridges, reduce the use of steel plate and wlding, obtained considerable economic benefit; The 3rd, because reduce in the gap of assembling circumferential weld, gap is even, and the filling of circumferential weld is reduced relatively, and welder's welding activity duration reduces; The 4th, even weld, welding fabrication is attractive in appearance, has reduced the relief grinding amount, has shortened the activity duration, improves effect; The 5th, abandon former technique, adopt the one piece cutting technique that steel plate is carried out and contains the required groove of welding procedure, its operation is few, cut surface is smooth, curve transition is smoother, and cut quality is high; The 6th, after its cutting, curve size and gas cutting face quality all are improved; The tube coupling gap that has guaranteed assembling is even, has met the requirement of arch rib docking curve, has also met the automatic welder(welding machine) welding process requirement; The 7th, because reduce in the gap of assembling circumferential weld, gap is even, and the filling of circumferential weld is reduced relatively, and welder's welding activity duration reduces; The 8th, Workshop Production flow of tissue water-based is strong, blanking —Zhi garden-welding-detection-assembling, and the production production process is clear, highly efficient in productivity; The 9th, improved work efficiency, due to even weld, welding fabrication is attractive in appearance, has reduced the relief grinding amount, has shortened the activity duration.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of tube coupling steel plate cutting intersection, B1.B2 two ends width dimensions, L-steel plate length.
Fig. 2 is graduation apparatus and 360
.the decomposition texture schematic diagram of angle station, number in the figure: the 1st, elevating lever, the 2nd, transfer, the 3rd, angle graduated scale, the 4th, gas cutting is chewed head.
the specific embodiment
Embodiment 1: with reference to attached Fig. 1 and 2.This technique is a kind of flame cutting method (a kind of steel pipe arch bridge tube coupling steel plate intersection numerical control cutting method), comprise NC flame cutting machine, in the WD-105 NC flame cutting machine, (1) draw the curve map of steel pipe arch bridge tube coupling steel plate intersection by geometric method, and in the importing NC flame cutting machine, (2) at NC flame cutting machine, gyrator (2-transfer in Fig. 2) is housed, this gyrator can make NC flame cutting machine realize the cutting that turns to of four direction, (3) steel plate is contained to the curvilinear cut of welding required technique groove, can obtain meeting the part of arch rib docking curve requirement.
1.
determine method:the WD-105 NC flame cutting machine utilized, draw the curve map of intersection and import in numerical control cutting machine by geometric method, then steel plate contained to the curvilinear cut of welding required technique groove, and the part obtained can meet the requirement of arch rib docking curve.
2.
test is prepared:due to can't the reverse cut groove on numerical control cutting machine (former never carry out this kind of processing), for reliability and the cut quality that guarantees technique.At first, steel plate is carried out to cutting test, by the evidence numerical control cutting machine, the cutting accuracy of curve slope is controlled to the requirement that meets automatic soldering technique; Secondly, the arch rib blanking exists the split requirement of four direction; Need to do further transformation to flame cutting machine, could realize corner cutting purpose.Therefore, at first this programme designs an angle station device (2-transfer in Fig. 2), adopts the sleeve mode to guarantee to realize that four direction turns to cutting.Operation principle is: complete and turn to by the draw-in groove on gyrator, realize that NC flame cutting machine is vertical to steel plate, the transverse cuts operation; The 3rd, set up graduation apparatus (in Fig. 2 3) and pressing plate on the fixedly cutting gun rack of NC flame cutting machine, provide operability for realizing containing the groove cutting test like this.
3.
process of the test:
Successively carry out the integral cutting tube coupling experiment work of two phases according to arranging, further to improve the cutting technique scheme, be familiar with the impact of equipment performance on cut quality, and reliability, the validity of verifying this process.
first phase:feed intake six, use the steel plate cutting of-16 * 2.2 * 3.0 meters, be of a size of-16 * 600 * 2827=6.It is 920 mm steel pipes that diameter is made in plan.
second phase:after the problem that solves first phase test existence, proceed second phase test.Second phase feeds intake five, uses each of-16 * 2.2 * 9.5 meters 16Mn and-16 * 2.0 * 8.5 16Mnq steel plate, be-16 * 600 * 3091=5 of blank size piece.Selecting the unlike material steel plate cutting, is mainly to meet the automatic welding of circumferential seams examination requirements.
test Summary
This Numerical control cutting intersection test, 11 of blankings.After weld detection through rounding → (longitudinal seam) welding → Hui Yuan → assembling → welding → detection ，Qi seven road weld seams.Assembly clearance basically 3～～5 mm(or 7～～mono-of 10mm) indivedual somes place is that 5 mm or the overproof overall length of 0 mm(are 750 mm, accounts for 5.26 ℅ of interface length); The groove size also can be strict controlled in 4～～6 mm, meets the requirement of welding procedure fully, and the effect of test is very good.
4.
practice
With NC flame cutting machine, steel plate is cut to intersection through pre-stage test proof feasible, the application contracts application (project job number: 105-56) in the production of 136 meters steel pipe arch bridges in company.Improved the levelness of materials and parts, the application has improved numerical control cutting machine blowing platform simultaneously, will originally use addendum cone holder steel plate mode to change lath holder steel plate into, guarantees that cutting front and back steel plate is smooth, and error reduces.In order to guarantee at 136 meters steel pipe arch bridge implementation success, workshop technical staff and production operation personnel have worked out " 136 meters, Xianyang arch bridge intersection Numerical control cutting is controlled main points " and " numeric control quality testing control point ", " 136 meters steel pipe arch bridge Numerical control cutting record sheets " (See Attachment 1, annex two) specially in addition.Numerical control programming, Numerical control cutting, three operations of roller circular knitting machine rounding have been stipulated to detail requirement, for further carrying out implementation, provide assurance.
136 meters steel pipe arch bridge arch ribs need blanking 268 fast.According to the arrangement of production operation progress, feeding intake is divided into three phases and carries out:
Arch rib blanking carrying out first stage: from April 2--April 25, (real work day is 21 days), feed intake 131 altogether.Wherein overproof 6 (accounting for 4.91 ℅ of this blanking), scrap 1.
Arch rib blanking carrying out second stage: from April 26--May 04, (real work day is 6 days), feed intake 38 altogether.All meet the requirement of technique.
Carried out the blanking of upper and lower arch rib on phase III: from May 25--June 09, (real work day is 10 days), feed intake 58 altogether.All meet the requirement of technique.
The application follows the tracks of the assembling of 136 meters steel pipe arch bridge arch ribs, has basically reached satisfied effect.Testing result shows: after assembling, dimension discrepancy only has 19.1 ℅～23.6 ℅, and only there are 5.35 ℅～～18.0 ℅ in overproof gap.And the circumferential weld gap is even, can be controlled in the scope of technological requirement.
5,
economic benefit
(1) owing to adopting Numerical control cutting once to form, reduce 5～6 of operations, the 200 minutes/every tube coupling of can reducing work hours, improve nearly one times of man-haur efficiency; Only workshop can be reduced labour cost and paid 13.4 yuan/hour of 200/60 Χ=44.67 yuan/tube coupling.With 268 calculating of the 136 meters steel pipe arch bridge full-bridge arch ribs in Xianyang, 11972 yuan (44.67 yuan * 268 tube couplings=11971.56) of the artificial expenditure of workshop saving, 136 meters steel pipe arch bridge workshop units reduce 11971.56 yuan/206.054 tons=58 yuan/tons of labour cost expenditures.
(2) new technology can save material, and stock utilization is improved greatly.
Need to, in laterally reserved 50mm intersection secondary cut amount, vertically reserve 20mm beveling machine processing capacity during former technique blanking; Concrete blank size is (2000+50) * (3091+20), and stock utilization is 96.44 ﹪.
New technology is owing to adopting the numerical control blanking, and its blanking clout can be used (former technique flame cuts the material limit of material, can only discard as steel scrap).The 136 meters steel pipe bridges of first take are example, but, to 3 of the steel plate blankings (2000 * 3091=6.182) of the wide 2050mm * 9350mm of plate, its rim charge is that 50～90mm is rectangular, all can meet the needs that weld corbel back slab or assemble the horse plate.There is no any waste material, stock utilization improves greatly, can improve stock utilization 3.32 ﹪.With 268 calculating of 136 meters steel pipe bridge arch rib processing, but just saving steel 6.446 tons (0.1915 M2/ piece * 268 * 125.6=6.446T) can be saved 33519 yuan of fee of materials.
Because the new technology assembly clearance improves, can greatly reduce the loading of welding rod in weld seam.In Xianyang 136 meters steel pipe arch bridge arch ribs adopt new technology assembly clearance be only 4～～9mm, former process gap is 6～～15 mm, on average also in 12 mm left and right.Only 136 meters steel pipe arch bridge arch ribs need weld 214 circumferential welds, just can save wlding 1275 Kg(1.92 * 3.1 * 214=1275 Kg), reduce costs 10838 yuan (1275 * 8500=10837.5).
(3) because the new technology assembly clearance reduces greatly, shorten the effective time, production efficiency also can improve greatly.With 136 meters steel pipe bridges, calculate, single tube docking circumferential weld improves work efficiency 25.55 ﹪ (3091-2462/2462=25.55), can reduce 5260 yuan (8 * 4 * 25.55 ﹪ * 13.4 * 48=5260) of labour cost expenditure.
(4) obtained considerable economic benefit at 136 meters steel pipe arch bridges:
11972 yuan+33519 yuan+10838 yuan+5260 yuan=61589 yuan
Unit index: 61589/206=299 yuan/ton.That is: tubular arch per ton can reduce by 299 yuan.
6,
potential benefit
1. adopt numerical control once to cut and form, the work holdup, the stagnation of avoiding rod member turnover back and forth to bring, reduce the inter process time of staying and work-yard.Make organization of production more smooth and easy.The Workshop Production of the 136 meters steel pipe arch bridges in Xianyang illustrates the effect of improving technique well, and Workshop Production is organized into continuous productive process, blanking —Zhi garden-welding-detection-assembling, and process is very clear, highly efficient in productivity.
2. because reduce in the gap of assembling circumferential weld, gap is even, and the filling of circumferential weld is reduced relatively, and welder's welding activity duration reduces.In 136 meters steel pipe arch bridges, caliber is Φ 1000 mm, and every sections is generally 5-6 interfaces, arranges four-player to be welded, and all can within a work day, complete.Improve 20 ~ ~ 30 ﹪ than original arch rib welding.(in 56 meters arch bridges, caliber was Φ 800 mm originally, and every sections is generally 6-7 interfaces, arranged four-player to be welded, and needed to connect class and just can complete).
3. due to the minimizing in gap, and even weld, the welding fabrication better appearance, reduced the relief grinding amount, shortened the activity duration, improves effect.
Need to understand: although above-described embodiment is to the mentality of designing of the present invention detailed text description of contrasting; but these text descriptions; just the simple text of mentality of designing of the present invention is described; rather than to the restriction of mentality of designing of the present invention; any increase, modification or combination that does not exceed mentality of designing of the present invention, all fall within the scope of protection of the present invention.
Claims (1)
1. a steel pipe arch bridge tube coupling steel plate intersection Numerical control cutting technique, comprise NC flame cutting machine, and it is characterized in that: (1) draws the curve map of steel pipe arch bridge tube coupling steel plate intersection and imports in NC flame cutting machine by geometric method; (2) at NC flame cutting machine, the self-control gyrator is housed, this gyrator can make NC flame cutting machine realize that four direction turns to cutting; (3) steel plate is contained to the curvilinear cut of welding required technique groove, can obtain meeting the part of arch rib docking curve requirement.
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| CN201210343582.4A CN102886588B (en) | 2012-09-17 | 2012-09-17 | Steel pipe arch bridge tube coupling steel plate intersection Numerical control cutting technique |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723205A (en) * | 2015-04-08 | 2015-06-24 | 武汉一冶钢结构有限责任公司 | Fast machining method of minor-diameter steel pipe intersecting line |
| CN105562882A (en) * | 2016-03-03 | 2016-05-11 | 湖北浩南钢结构工程有限公司 | Method for cutting and discharging of box column web |
| CN106141368A (en) * | 2016-07-28 | 2016-11-23 | 青岛海西重机有限责任公司 | A kind of FLAME NC cutting method of steel pipe full penetration intersection groove |
| CN107096812A (en) * | 2017-04-17 | 2017-08-29 | 宝鸡中铁宝桥天元实业发展有限公司 | Steel pipe of arch bridge cold-bending method |
| CN109014427A (en) * | 2018-09-27 | 2018-12-18 | 浙江精工钢结构集团有限公司 | A kind of vertical bar blanking groove synchronous cutting technique |
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| CN87210943U (en) * | 1987-07-23 | 1988-09-14 | 周系华 | Cutter for intersecting line between two cylindrical tubes |
| CN101011806A (en) * | 2007-01-29 | 2007-08-08 | 宋宝安 | Cutting device for pipe intersecting lines |
| CN101653872A (en) * | 2009-09-24 | 2010-02-24 | 南京奥特电气有限公司 | Rolling disc type two-axis numerical control pipeline cutting machine |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210943U (en) * | 1987-07-23 | 1988-09-14 | 周系华 | Cutter for intersecting line between two cylindrical tubes |
| CN101011806A (en) * | 2007-01-29 | 2007-08-08 | 宋宝安 | Cutting device for pipe intersecting lines |
| CN101653872A (en) * | 2009-09-24 | 2010-02-24 | 南京奥特电气有限公司 | Rolling disc type two-axis numerical control pipeline cutting machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104723205A (en) * | 2015-04-08 | 2015-06-24 | 武汉一冶钢结构有限责任公司 | Fast machining method of minor-diameter steel pipe intersecting line |
| CN105562882A (en) * | 2016-03-03 | 2016-05-11 | 湖北浩南钢结构工程有限公司 | Method for cutting and discharging of box column web |
| CN106141368A (en) * | 2016-07-28 | 2016-11-23 | 青岛海西重机有限责任公司 | A kind of FLAME NC cutting method of steel pipe full penetration intersection groove |
| CN107096812A (en) * | 2017-04-17 | 2017-08-29 | 宝鸡中铁宝桥天元实业发展有限公司 | Steel pipe of arch bridge cold-bending method |
| CN109014427A (en) * | 2018-09-27 | 2018-12-18 | 浙江精工钢结构集团有限公司 | A kind of vertical bar blanking groove synchronous cutting technique |
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Effective date of registration: 20170601 Address after: Baoji City, Shaanxi Province Road 721001 Jintai District No. 43 Po Patentee after: Baoji Railway Bridge Tianyuan Industry Development Co.,Ltd. Address before: 721006 Baoji Qing Jiang Road, Shaanxi, No. 80 Patentee before: China Railway Baoji Bridge Group Co., Ltd. |
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