CN101633082A - Deformation prevention welding method for automobile crane subsidiary arm thick and thin wall component - Google Patents
Deformation prevention welding method for automobile crane subsidiary arm thick and thin wall component Download PDFInfo
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- CN101633082A CN101633082A CN200910305933A CN200910305933A CN101633082A CN 101633082 A CN101633082 A CN 101633082A CN 200910305933 A CN200910305933 A CN 200910305933A CN 200910305933 A CN200910305933 A CN 200910305933A CN 101633082 A CN101633082 A CN 101633082A
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Abstract
The invention discloses a deformation prevention welding method for an automobile crane subsidiary arm thick and thin wall component, which comprises the following steps: (1) tacking single pieces; (2) tacking an arm frame; (3) welding; (4) tacking a support seat and then welding. The deformation prevention welding method for an automobile crane subsidiary arm thick and thin wall component can effectively ensure the perpendicularity and the straightness of a subsidiary arm.
Description
Technical field
The present invention relates to the distortion-free welding method of automobile crane subsidiary arm thick and thin wall structure part, can effectively control the linearity and the vertical symmetry of auxiliary.
Background technology
Autocrane is the indispensable crane tool of contemporary national defence, traffic, mine, oil field, industry and civil buildings.Auxiliary is that autocrane increases lifting altitude, enlarges the critical piece of job area, is characterized in that build is long: 350 tons of automobile crane subsidiary arms are grown 42 meters; In light weight, all material is selected high-strength steel book arm tubing and sheet material for use, only 3.5 tons of 42 meters long auxiliarys; Complex structure, 350 tons of auxiliarys divide four truss arms and three links to form by 800 parts, and geometry is tapering rectangle and triangle taper, and armrest work industry can't reach designing requirement; The difficult control of stress release; Because workpiece is big, pad of material, solder joint are many, cold-working welding flexible type is made very difficulty, must be vertical with the butt joint of autocrane principal arm, if crooked meeting causes that the host work center of gravity is unbalance, cause security incident, and be one of safety means of state key management.
Conventional auxiliary production technology is on the pattern of location welding each component the every joint jib of auxiliary separately behind the location.As Fig. 1 is the jib figure of a joint auxiliary, among Fig. 1: 1: left monolithic, 2: right monolithic, 3: bearing, 4: web member.The auxiliary that every like this joint jib welding back is formed by connecting by the bearing latch, automobile crane subsidiary arm are common earlier with all spot welding on mould of various components when welding, and then all welding is finished.Weld the auxiliary of finishing like this, because the unbalanced stress of welding is even.Cause the crooked torsional deformation of auxiliary easily.Perpendicularity and linearity be not as reaching requirement, and the auxiliary skew problem has changed the normal stress of auxiliary, and the arm secundly can cause main frame unbalance during work, and serious deflection can cause major accident, causes the person and property loss.
Cause the uneven main several aspects of internal stress to be:
1. every joint arm length overall is made up of 4 profound bars of master and bearing more than 8 meters.So long product perpendicularity and linearity all will be controlled in the 1mm, could guarantee that auxiliary is not crooked.
2. complex-shaped: the auxiliary structure is tapering square type or triangle.
3. material complexity: by material: 16mn sheet material and tubing are arranged, HG60, HG70, HG80, import 960 high strength steel plates are arranged, 27simn, 20mn2 tubing are arranged.
By the material shape branch: plane component, folding component are arranged, seamless square steel tube, seamless rectangular pipe, seamless circular steel pipe.
Press the material thickness branch: sheet metal thickness 3mm-80mm, tubing thickness 2.5mm-6mm, welding need be at unlike material, and different-thickness is heated and could be welded after the preheating.
4. weld seam is many, and requirement differs, welding forming is different.Weld seam surpasses 180 multiple tracks, and two people's butt welding do not rest, need through 6? hour.Because of the became uneven of material, the time of thermal expansion and thermal contraction is inconsistent, the difficult control of the temperature difference during welding, and the release certainty of its welding interior stress is asynchronous, also the large and small of internal stress do not wait yet everywhere.
Summary of the invention
Technical problem to be solved by this invention is to cause crooked phenomenon in order to overcome the distortion of auxiliary welding back welding stress generation auxiliary, and a kind of distortion-free welding method of automobile crane subsidiary arm thick and thin wall structure part that can effectively guarantee auxiliary perpendicularity and linearity is provided.
In order to solve the problems of the technologies described above, automobile crane subsidiary arm thick and thin wall provided by the invention is constructed the distortion-free welding method of part, and its step is as follows:
(1), tack welding monolithic
On mould, each tubing location is welded into left monolithic and right monolithic;
(2), jib tack welding
All components of left monolithic and right monolithic, bearing adopt the mode point of tack welding to be welded into integral body on mould with comprising of auxiliary, and bearing all only needs spot welding a little, need not weld;
(3), welding
Except that bearing, whole auxiliary welded on pattern finish, go to splash, the reconditioning weld seam is taked two people balanced welding simultaneously, does not allow to rest in whole the welding process;
(4), weld behind the bearing tack welding
Bearing removal from the auxiliary, again auxiliary is laid out mould, carry out full weld behind the anti-deformation stay and be welded on the auxiliary adding behind the bearing location again.
Adopt the distortion-free welding method of automobile crane subsidiary arm thick and thin wall structure part of technique scheme, the stress that the welding of single-unit auxiliary can be produced is at first eliminated, be not concentrated in the bearing place, with bearing removal from the auxiliary, be exactly that the stress that single-unit auxiliary welding produces is eliminated, again auxiliary laid out mould, carry out full weld behind the anti-deformation stay and be welded on the auxiliary adding behind the bearing location again, allow the perpendicularity and the linearity of auxiliary be guaranteed, prevented that effectively the distortion of auxiliary is crooked.
Measure the linearity of two end bearings at 1-3mm according to the single-unit auxiliary production technology before improving.
And adopt the single-unit auxiliary production technology after improving to measure the linearity of two end bearings smaller or equal to 1mm.
In sum, the present invention is a kind of distortion-free welding method of automobile crane subsidiary arm thick and thin wall structure part that can effectively guarantee auxiliary perpendicularity and linearity.
Description of drawings
Fig. 1 is the auxiliary structural representation;
Fig. 2 is left monolithic or right single chip architecture schematic diagram;
Fig. 3 is a jib tack welding schematic diagram.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
The distortion-free welding method of automobile crane subsidiary arm thick and thin wall structure part, its step is as follows:
(1), tack welding monolithic
Referring to Fig. 2, on mould, each tubing location is welded into left monolithic 1 and right monolithic 2;
(2), jib tack welding
Referring to Fig. 3, all components of left monolithic 1 and right monolithic 2, bearing 3 adopt the mode point of tack welding to be welded into integral body on mould with comprising of auxiliary 5, and bearing 3 all only needs spot welding a little, need not weld;
(3), welding
Referring to Fig. 3, except that bearing 3, whole auxiliary 5 welded on pattern finish, go to splash, the reconditioning weld seam is taked two people balanced welding simultaneously, does not allow to rest in whole the welding process;
(4), weld behind the bearing tack welding
Referring to Fig. 3, bearing 3 removal from the auxiliary 5, again auxiliary 5 is laid out mould, carry out full weld behind the anti-deformation stay and be welded on the auxiliary 5 adding behind bearing 3 location again.
Claims (1)
1, the distortion-free welding method of a kind of automobile crane subsidiary arm thick and thin wall structure part, it is characterized in that: its step is as follows:
(1), tack welding monolithic
On mould, each tubing location is welded into left monolithic (1) and right monolithic (2);
(2), jib tack welding
Adopt the mode point of tack welding to be welded into integral body on mould all components that comprise left monolithic (1) and right monolithic (2), bearing (3) of auxiliary (5), bearing (3) all only needs spot welding a little, need not weld;
(3), welding
Except that bearing (3), whole auxiliary (5) welded on pattern finish, go to splash, the reconditioning weld seam is taked two people balanced welding simultaneously, does not allow to rest in whole the welding process;
(4), weld behind the bearing tack welding
Bearing (3) is gone up removal from auxiliary (5), again auxiliary (5) is laid out mould, carry out full weld behind the anti-deformation stay and be welded on the auxiliary (5) adding behind bearing (3) location again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103059330A CN101633082B (en) | 2009-08-21 | 2009-08-21 | Deformation prevention welding method for automobile crane subsidiary arm thick and thin wall component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103059330A CN101633082B (en) | 2009-08-21 | 2009-08-21 | Deformation prevention welding method for automobile crane subsidiary arm thick and thin wall component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101633082A true CN101633082A (en) | 2010-01-27 |
| CN101633082B CN101633082B (en) | 2011-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103059330A Expired - Fee Related CN101633082B (en) | 2009-08-21 | 2009-08-21 | Deformation prevention welding method for automobile crane subsidiary arm thick and thin wall component |
Country Status (1)
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| CN (1) | CN101633082B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033556A (en) * | 2015-08-31 | 2015-11-11 | 南车石家庄车辆有限公司 | Arm frame paired tool at top of dynamic compactor |
| CN105033553A (en) * | 2015-08-31 | 2015-11-11 | 南车石家庄车辆有限公司 | End positioning support for middle arm frame pairing tool |
-
2009
- 2009-08-21 CN CN2009103059330A patent/CN101633082B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033556A (en) * | 2015-08-31 | 2015-11-11 | 南车石家庄车辆有限公司 | Arm frame paired tool at top of dynamic compactor |
| CN105033553A (en) * | 2015-08-31 | 2015-11-11 | 南车石家庄车辆有限公司 | End positioning support for middle arm frame pairing tool |
| CN105033556B (en) * | 2015-08-31 | 2017-07-18 | 中车石家庄车辆有限公司 | Arm support group is to frock at the top of dynamic compaction machinery |
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| Publication number | Publication date |
|---|---|
| CN101633082B (en) | 2011-04-13 |
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Granted publication date: 20110413 Termination date: 20160821 |