CN104690395A - Method for welding balance supporting block of large gate - Google Patents
Method for welding balance supporting block of large gate Download PDFInfo
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- CN104690395A CN104690395A CN201510119054.4A CN201510119054A CN104690395A CN 104690395 A CN104690395 A CN 104690395A CN 201510119054 A CN201510119054 A CN 201510119054A CN 104690395 A CN104690395 A CN 104690395A
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- gate
- welding
- balanced support
- support block
- welding method
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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
- B23K9/00—Arc welding or cutting
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Abstract
The invention provides a method for welding a balance supporting block of a large gate. The welding method comprises the step S1 of determining the installing position of the balance supporting block on the gate; the step S2 of installing the balance supporting block on the gate; the step S3 of adopting an electric heating plate to preheat a weld joint area and utilizing a thermocouple to perform temperature monitoring; the step S4 of starting to perform burn-in on the balance supporting block when the preheating temperature reaches 300-350 DEG C; the step S5 of instantly adopting heat insulation cotton to perform binding after the welding is finished, and performing postheat heat insulation processing and postweld heat treatment. According to the method for welding the balance supporting block of the large gate, through the steps of preheating before welding, welding, heat insulation treatment and postweld heat treatment, the shortcoming that balance supporting blocks of large gates are easily subject to weld cracks during the welding in the prior art is effectively overcome, and the welding method is simple and easy to operate.
Description
Technical field
The present invention relates to welding field, particularly a kind of welding method of Gate balanced support block.
Background technology
In the prior art, inland starts to manufacture harbour more and more, makes full use of inland river resource with this, such as Antwerp harbour affairs office.Gate is from sea to a visual plant on harbour navigation channel, inland, and its Main Function is the impact controlling the internal river plane of sea tide ebb.
Transverse shift during gate work, ground is provided with gate walking track, be provided with a lower dolly bottom gate, top is provided with dolly, upper dolly is installed a set of winding system to draw gate opening and to close.For regulating gate is vacillated now to the left, now to the right in the process of walking, two pieces of balanced support blocks installed by gate, props up the upper back shaft of lower dolly with this, play the effect of equilibrium level when gate moves.This is the important component on gate.
The material of usual this balanced support block is martensitic stain less steel (1Cr17Ni2), thick 148mm, wide 350mm, long 600mm, is arc-shaped in the direction of the width, with the upper back shaft of lower dolly for linearly to contact, and sliding friction.Enclose angle welding by one between back-up block and gate structure (S355J2+N) and two pieces of gussets are welded and fixed, the high strength exploitation of 8 M36 is separately installed.
Because the Gate bodily form is huge, can only be assembled in outfield, add very cold, between martensitic stain less steel and S355J2+N (one for EN10025 Europe superscript steel plate) two materials to weld difficulty large, a kind of reasonably welding method need be studied to evade weld crack.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the large defect of welding difficulty on the medium-and-large-sized gate of prior art between unlike material, providing a kind of welding method of Gate balanced support block.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of welding method of Gate balanced support block, and its feature is, described welding method comprises the following steps:
S
1, on gate, determine the installation site of welding balanced support block;
S
2, described balanced support block is mounted on described gate;
S
3, adopt electric boiling plate butt welded seam region to carry out preheating, and utilize thermocouple to carry out monitoring temperature;
S
4, when preheat temperature reaches 300-350 DEG C, described balanced support BOB(beginning of block) is freezed;
S
5, welded after, immediately adopt heat-preservation cotton wrapping, carry out after heat isothermal holding and post weld heat treatment.
Preferably, described step S
1in further comprising the steps of:
S
11, the center line determined in described manufacture of gate short transverse, in this, as the datum line that described balanced support block is installed;
S
12, mark the installation site line of described balanced support block;
S
13, use bore template join the bolt mounting holes boring described balanced support block.
Preferably, described step S
2in also comprise step: by packaged for described balanced support be assigned on described gate before, the welded seam area of Ma Shi body stainless steel and described balanced support block link position is polished and cleans out, then adopt service bolt to be in place by described balanced support block.
Preferably, described step S
4described in freeze employing SMAW.
Preferably, described welding rod adopts model to be GES-309L, and diameter is the welding rod of 4.0mm.
Preferably, the welding current of described arc welding is 120-160A, and weldingvoltage is 21-22V, and speed of welding is 190-240mm/min.
Preferably, between the road of described arc welding, temperature is more than or equal to the minimum of a value of described preheat temperature, and between described road, temperature is less than or equal to 400 DEG C.
Preferably, described step S
5described in after heat isothermal holding adopt 200 DEG C, be incubated 2 hours.
Preferably, described after heat isothermal holding, after 2 hours, when not lowering the temperature, carrying out described post weld heat treatment immediately, being heated to 650-700 DEG C, is incubated and starts air cooling after 3.5 hours.
Preferably, described step S
5described in after heat isothermal holding and described post weld heat treatment adopt digitlization electric heating equipment to carry out monitoring tracking.
Positive progressive effect of the present invention is: the welding method of Gate balanced support block of the present invention is by steps such as weld preheating, welding, isothermal holding and post weld heat treatment, efficiently solve the defect that the block welding of prior art medium-and-large-sized gate balanced support easily produces weld crack, and described welding method is simple to operation.
Accompanying drawing explanation
The above and other feature of the present invention, character and advantage are by more obvious by what become below in conjunction with the description of drawings and Examples, and Reference numeral identical in the accompanying drawings represents identical feature all the time, wherein:
Fig. 1 is that in Gate balanced support block welding method of the present invention, balanced support block is mounted to the structural representation on gate.
Fig. 2 is along the sectional view that A-A line is cut open in Fig. 1.
Fig. 3 is the Welding Structure schematic diagram of balanced support block in Gate balanced support block welding method of the present invention.
Fig. 4 is along the sectional view that B-B line is cut open in Fig. 3.
Fig. 5 is the curve map carrying out post weld heat treatment in Gate balanced support block welding method of the present invention.
Detailed description of the invention
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
Set forth a lot of detail in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here to implement, therefore the present invention is not by the restriction of following public specific embodiment.
Fig. 1 is that in Gate balanced support block welding method of the present invention, balanced support block is mounted to the structural representation on gate.Fig. 2 is along the sectional view that A-A line is cut open in Fig. 1.
As depicted in figs. 1 and 2, the welding method of Gate balanced support block of the present invention, it comprises the following steps:
Step one, on gate 10, determine the installation site of welding balanced support block 20.First, determine that gate 10 makes centre line L 1, L2 in short transverse, in this, as the datum line that balanced support block 20 is installed.Then, the installation site line of balanced support block 20 is marked.Re-use bore template and join the bolt mounting holes (not shown) boring balanced support block 20.
The transverse shift when gate 10 works, ground is provided with gate walking track, be provided with a lower dolly 13 bottom gate 10, top is provided with dolly, upper dolly is installed a set of winding system to draw gate opening and to close.For regulating gate is vacillated now to the left, now to the right in the process of walking, two pieces of balanced support blocks 12 installed by gate, props up the upper back shaft 14 of lower dolly 13 with this, play the effect of equilibrium level when gate 10 moves.
Step 2, balanced support block 20 to be mounted on gate 10.Before balanced support block 20 is assembled on gate 10, Ma Shi body stainless steel 11 is polished with the welded seam area of balanced support block 20 link position and cleans out, then adopt service bolt to be in place by balanced support block 20.
Step 3, employing electric boiling plate butt welded seam region are carried out preheating, and are utilized thermocouple to carry out monitoring temperature.Further particularly, in the process, need to adopt the wlding that cures on request, described wlding must use new wlding, can not use the idle wlding spent the night, and in welding process, heat-preserving container must be energized insulation.Then, adopt electric boiling plate butt welded seam region to carry out preheating, because preheating and interlayer temperature require higher, need to increase electric boiling plate in stainless steel backing plate surrounding, and cover by heat-preservation cotton, carry out temperature control, ensure the minimum preheat temperature requirement in welding process, utilize thermocouple to carry out monitoring temperature.
Step 4, when preheat temperature reaches 300-350 DEG C, start to freeze to balanced support block 20.Described freezing preferably adopts SMAW, and such as select model to be GES-309L, diameter is the welding rod of 4.0mm.Further preferably, the welding current of described arc welding is 120-160A, and weldingvoltage is 21-22V, and speed of welding is 190-240mm/min.Herein, martensitic stain less steel 11 is angle welding with the structure welding of gate 10, and drawing requirement leg large (as shown in Figure 3 and Figure 4), namely needs multi-pass welding.Between the road of described arc welding, temperature is more than or equal to the minimum of a value of described preheat temperature, and between described road, temperature is less than or equal to 400 DEG C.Because the weldability of martensitic stain less steel 11 is poor, have stronger cold cracking inclination, therefore adopt in welding process small area analysis, small voltage, little heat input prevent coarse grains.
Step 5, welded after, immediately adopt heat-preservation cotton wrapping, carry out after heat isothermal holding and post weld heat treatment.Described after heat isothermal holding adopts 200 DEG C, is incubated 2 hours.After completing described after heat isothermal holding 2 hours, when not lowering the temperature, carrying out described post weld heat treatment immediately, being heated to 650-700 DEG C, be incubated and start air cooling after 3.5 hours.
, it is emphasized that same back-up block is welded by two people herein simultaneously, disposablely complete the work such as welding, postweld heat preservation, post weld heat treatment, martensitic stain less steel effectively can be avoided like this to have the process repeatedly heating up and lower the temperature, cause hydraulic performance decline.
Fig. 5 is the curve map carrying out post weld heat treatment in Gate balanced support block welding method of the present invention.As shown in Figure 5, in line segment AB region, carry out 670 DEG C of insulation 20min.In line segment BC region, carry out air cooling, about 550-475 DEG C, this interval requires rapid cooling.
Further preferably, described after heat isothermal holding and described post weld heat treatment require higher, and need to adopt digitlization electric heating equipment, after setting heating parameters, carry out Intelligent heating, whole process is enabled monitoring and followed the tracks of.
According to foregoing description, use welding method of the present invention, joint angle weld seam all have passed PT flaw detection, and (PT flaw detection is dye penetrant inspection or cries penetrant inspection, strong osmotic agent is utilized to penetrate in Surface-breaking defect exactly, then excess surface bleeding agent is washed, again by a kind of detection method of developer by bleeding agent sucking-off display defect vestige) inspection that requires, effectively control the weldquality and the assembly accuracy of manufacture that gate weld balanced support block.
The present invention is also under the cold climate of outfield, and steel construction dispels the heat feature quickly along its length, devises a set of steel construction heating means.10 groups of electrical heating blocks are adopted to be arranged symmetrically with along welding region, and cotton at the outer covering and heat insulating of electric boiling plate, and by increasing heating region, the temperature difference in structure is reduced, and the method that heat radiation is slowed down, is successfully heated to about 675 DEG C by postheat temperature.
In sum, Gate balanced support block welding method of the present invention is by steps such as weld preheating, welding, isothermal holding and post weld heat treatment, efficiently solve the defect that the block welding of prior art medium-and-large-sized gate balanced support easily produces weld crack, and described welding method is simple to operation.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these embodiments, but these change and amendment all falls into protection scope of the present invention.
Claims (10)
1. a welding method for Gate balanced support block, is characterized in that, described welding method comprises the following steps:
S
1, on gate, determine the installation site of welding balanced support block;
S
2, described balanced support block is mounted on described gate;
S
3, adopt electric boiling plate butt welded seam region to carry out preheating, and utilize thermocouple to carry out monitoring temperature;
S
4, when preheat temperature reaches 300-350 DEG C, described balanced support BOB(beginning of block) is freezed;
S
5, welded after, immediately adopt heat-preservation cotton wrapping, carry out after heat isothermal holding and post weld heat treatment.
2. the welding method of Gate balanced support block as claimed in claim 1, is characterized in that, described step S
1in further comprising the steps of:
S
11, the center line determined in described manufacture of gate short transverse, in this, as the datum line that described balanced support block is installed;
S
12, mark the installation site line of described balanced support block;
S
13, use bore template join the bolt mounting holes boring described balanced support block.
3. the welding method of Gate balanced support block as claimed in claim 1, is characterized in that, described step S
2in further comprising the steps of: by packaged for described balanced support be assigned on described gate before, the welded seam area of Ma Shi body stainless steel and described balanced support block link position is polished and cleans out, then adopt service bolt to be in place by described balanced support block.
4. the welding method of Gate balanced support block as claimed in claim 1, is characterized in that, described step S
4described in freeze employing SMAW.
5. the welding method of Gate balanced support block as claimed in claim 4, is characterized in that, described welding rod adopts model to be GES-309L, and diameter is the welding rod of 4.0mm.
6. the welding method of Gate balanced support block as claimed in claim 4, it is characterized in that, the welding current of described arc welding is 120-160A, and weldingvoltage is 21-22V, and speed of welding is 190-240mm/min.
7. the welding method of Gate balanced support block as claimed in claim 4, it is characterized in that, between the road of described arc welding, temperature is more than or equal to the minimum of a value of described preheat temperature, and between described road, temperature is less than or equal to 400 DEG C.
8. the welding method of Gate balanced support block as claimed in claim 1, is characterized in that, described step S
5described in after heat isothermal holding adopt 200 DEG C, be incubated 2 hours.
9. the welding method of Gate balanced support block as claimed in claim 8, it is characterized in that, described after heat isothermal holding is after 2 hours, when not lowering the temperature, carry out described post weld heat treatment immediately, be heated to 650-700 DEG C, be incubated and start air cooling after 3.5 hours.
10. the welding method of Gate balanced support block as claimed in claim 1, is characterized in that, described step S
5described in after heat isothermal holding and described post weld heat treatment adopt digitlization electric heating equipment to carry out monitoring tracking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119054.4A CN104690395A (en) | 2015-03-18 | 2015-03-18 | Method for welding balance supporting block of large gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510119054.4A CN104690395A (en) | 2015-03-18 | 2015-03-18 | Method for welding balance supporting block of large gate |
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| Publication Number | Publication Date |
|---|---|
| CN104690395A true CN104690395A (en) | 2015-06-10 |
Family
ID=53338156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510119054.4A Pending CN104690395A (en) | 2015-03-18 | 2015-03-18 | Method for welding balance supporting block of large gate |
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Citations (9)
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|---|---|---|---|---|
| JPS49105741A (en) * | 1973-02-12 | 1974-10-07 | ||
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| JPS51114346A (en) * | 1975-04-02 | 1976-10-08 | Hitachi Ltd | Highhstrength martensite stainless steel welding rod for highhtemperature use |
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2015
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Patent Citations (9)
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| JPS51114346A (en) * | 1975-04-02 | 1976-10-08 | Hitachi Ltd | Highhstrength martensite stainless steel welding rod for highhtemperature use |
| CN101176942A (en) * | 2007-12-03 | 2008-05-14 | 鞍钢重型机械有限责任公司金属结构厂 | Method for welding OCr13Ni5Mo low-carbon martensitic stainless steel |
| CN101596640A (en) * | 2008-06-06 | 2009-12-09 | 中国海洋石油总公司 | The welding procedure of super martensitic stainless steel |
| CN101462191A (en) * | 2009-01-13 | 2009-06-24 | 中国建筑第六工程局有限公司 | Low temperature welding method between Q345D steel structure |
| CN102085602A (en) * | 2011-01-13 | 2011-06-08 | 安徽跨宇钢结构网架工程有限公司 | Steel-structure thick plate welding construction method under low-temperature environment |
| CN102615381A (en) * | 2012-04-05 | 2012-08-01 | 永升建设集团有限公司 | Welding method for steel structure in environment of -15 DEG C to 35 DEG C |
| CN102794538A (en) * | 2012-07-23 | 2012-11-28 | 宁夏共享集团有限责任公司 | Welding method for improving low-temperature impact toughness of low carbon martensite stainless steel welded joint |
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Application publication date: 20150610 |
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