CN115351401B - Welding clamping device for drop hammer test sample and use method thereof - Google Patents
Welding clamping device for drop hammer test sample and use method thereof Download PDFInfo
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- CN115351401B CN115351401B CN202211045294.0A CN202211045294A CN115351401B CN 115351401 B CN115351401 B CN 115351401B CN 202211045294 A CN202211045294 A CN 202211045294A CN 115351401 B CN115351401 B CN 115351401B
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- 238000003466 welding Methods 0.000 title claims abstract description 238
- 238000012360 testing method Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000011324 bead Substances 0.000 claims abstract description 113
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 239000000110 cooling liquid Substances 0.000 claims description 57
- 238000003825 pressing Methods 0.000 claims description 45
- 239000002932 luster Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 230000007704 transition Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 244000137852 Petrea volubilis Species 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- 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
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a welding clamping device for a drop hammer test sample and a use method thereof, wherein the device comprises a welding platform, a welding bead length adjusting structure, a compressing structure and a cooling structure; a positioning groove is formed in the top of the welding platform, a drop hammer sample is placed in the positioning groove, a welding bead length adjusting structure is arranged at the top of the drop hammer sample, a welding bead hole with adjustable length is formed in the welding bead length adjusting structure, and overlaying of the drop hammer sample is performed in the welding bead hole; the compressing structure is used for compressing the welding bead length adjusting structure and the drop hammer sample in the positioning groove; the welding platform is internally provided with a cooling structure. The device has a simple structure, is convenient to operate, can realize rapid clamping, positioning and welding of the sample, can adjust the length of a welding bead, and improves the welding efficiency; the cooling structure is arranged, so that the thermal influence of the high temperature of the arc on the base material sample can be effectively reduced.
Description
Technical Field
The utility model relates to the field of drop hammer tests of ferritic steel without plastic transition temperature, in particular to a welding clamping device for a drop hammer test sample and a use method thereof.
Background
With the rapid development of steel material manufacturing technology, the performance of the steel material is obviously improved, and under special working conditions, the steel plate is required to have excellent static mechanical properties (high strength and high hardness) and also has higher requirements on low-temperature toughness. The ferrite steel plastic transition temperature-free drop hammer test (hereinafter referred to as drop hammer test) is an engineering test method for researching the low-temperature toughness fracture performance of the ferrite steel with temperature transition behavior, and the test method is implemented according to the GB/T6803-2008 standard, and is widely applied to industrial production due to the advantages of simplicity, convenience and low cost. The drop hammer test needs to build up a welding bead on the surface of a sample, then grooving the middle part of the welding bead, and performing the test at a set temperature, and determining the plastic-free transition temperature of the steel plate by observing the expansion condition of a welding bead notch crack in a base metal, namely the highest temperature of brittle fracture of the material under the dynamic loading condition.
At present, a welding bead of a drop hammer sample is generally prepared in a manual welding mode, an operator needs to accurately weld the welding bead in the middle of the sample, the range of the welding bead length of the drop hammer sample in the current GB/T6803-2008 standard is specified to be 20-65 mm, and the operator generally needs to punch marks on the drop hammer sample according to the position and the size of the welding bead, so that the welding continuity of the operator is seriously influenced, and the welding efficiency is lower. In addition, in the welding process, the high temperature of the electric arc tends to influence the base metal below the welding bead to form a heat affected zone, the grain structure of the heat affected zone is coarsened, and the coarsening of the grain structure of the heat affected zone caused by the difference of welding heat input and cooling conditions is the most important factor affecting the drop weight test result of the steel plate.
The Chinese patent publication No. CN 206952423U discloses a tool for preparing a metal drop hammer test piece, and when the tool is used for welding the drop hammer test piece, a cover plate with a weld bead hole is arranged above the test piece, so that the shape of the weld bead can be restrained. However, the welding bead length cannot be adjusted by adopting the tool, a cooling device is not arranged below the test sample to reduce the thermal influence of electric arc on a base metal in the welding process, and in addition, the device can only clamp and weld one test sample during each welding, so that the welding efficiency is lower.
The Chinese patent application with publication number of CN 113319480A discloses an auxiliary device for welding a drop hammer sample, and the Chinese patent application with publication number of CN 109500508A discloses a method for welding a sample of ferrite steel without plastic transition temperature drop hammer test, and the drop hammer sample welding methods are similar to each other, the drop hammer sample is placed in a cooling tank with cooling liquid flowing, and the cooling mode reduces the influence of arc high temperature on the drop hammer sample during welding to a certain extent, but the cooling liquid is exposed in a welding environment, so that the problem that a large number of air hole defects are easily caused in a welding bead. In addition, after the welding is finished, the cooling liquid on the drop hammer sample is required to be treated, and the working efficiency is low.
In view of the above problems in the prior art, an object of the present utility model is to provide a welding clamping device for a drop weight test sample and a method for using the same, which can improve the welding efficiency and welding quality of the drop weight test sample, and is simple and convenient to operate.
Disclosure of Invention
The utility model provides a welding clamping device for a drop hammer test sample and a use method thereof, which have the advantages of simple structure, convenient operation, capability of realizing rapid clamping, positioning and welding of the sample, capability of adjusting the length of a welding bead and improvement of welding efficiency; the cooling structure is arranged, so that the thermal influence of the high temperature of the arc on the base material sample can be effectively reduced.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
a welding clamping device for a drop hammer test sample comprises a welding platform, a welding bead length adjusting structure, a compacting structure and a cooling structure; a positioning groove is formed in the top of the welding platform, a drop hammer sample is placed in the positioning groove, a welding bead length adjusting structure is arranged at the top of the drop hammer sample, a welding bead hole with adjustable length is formed in the welding bead length adjusting structure, and overlaying of the drop hammer sample is performed in the welding bead hole; the compressing structure is used for compressing the welding bead length adjusting structure and the drop hammer sample in the positioning groove; the welding platform is internally provided with a cooling structure.
Further, the number of the positioning grooves is 1 to more, and when the number of the positioning grooves is more than one, the positioning grooves are mutually parallel.
Further, 1 to a plurality of drop hammer samples can be placed to the constant head tank, and welding length adjustment structure and drop hammer sample one-to-one setting.
Further, the welding length adjusting structure consists of 1 welding bead hole baseplate and 2 welding bead hole sliding plates; the width of the welding path hole base plate is matched with the width of the positioning groove on the welding platform, the welding path hole base plate is provided with a sliding groove along the longitudinal through length, 2 welding path hole sliding plates are arranged in the sliding groove, and sliding rails are arranged on two sides of the welding path hole sliding plates and matched with the sliding groove; the inner end of the welding bead hole sliding plate is provided with a groove-shaped hole, one end of the groove-shaped hole is of an open structure, and the other end of the groove-shaped hole is of a semicircular closed structure; the groove-shaped holes are positioned right above the strip-shaped holes, the width of the groove-shaped holes is the same as that of the strip-shaped holes, the length of the strip-shaped holes is larger than the length of the strip-shaped holes after the strip-shaped holes are combined, and the 2 groove-shaped holes and the strip-shaped holes form a welding bead hole together.
Further, the compression structure consists of a positioning pressing plate, a positioning bolt and a fastening bolt; the positioning pressing plate stretches over the positioning groove, one end of the positioning pressing plate is connected with the welding platform through a positioning bolt, and the other end of the positioning pressing plate is locked and fixed with the welding platform through a fastening bolt; the bottom of the positioning pressing plate is provided with a clamping groove matched with the welding bead length adjusting structure.
Further, the material of the welding bead length adjusting structure is red copper.
Further, the cooling structure is a cooling liquid pipeline which is arranged in a serpentine manner in the welding platform, one end of the cooling liquid pipeline is provided with a cooling liquid inlet, the other end of the cooling liquid pipeline is provided with a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are respectively connected with an external cooler.
Furthermore, hanging rings are respectively arranged at four corners of the top of the welding platform.
Further, the compressing structure is longitudinally provided with a plurality of positioning bolts and fastening bolts on the adjacent 2 positioning pressing plates in opposite symmetry along the positioning groove.
The application method of the welding clamping device for the drop hammer test sample comprises the following steps of:
1) Pretreating the drop hammer sample to expose the metallic luster of the surface to be welded, and cleaning and drying the surface to be welded;
2) Hoisting the welding platform into a welding laboratory, and adjusting the temperature and the relative humidity in the welding laboratory to meet the test requirement;
3) Placing the pretreated drop hammer sample in a positioning groove of a welding platform, and adjusting the relative positions of 2 welding bead hole sliding plates in a welding bead hole base plate according to test requirements to ensure that the welding bead hole length is consistent with the welding bead length required by the test;
4) Loosening the positioning bolt, rotating the positioning pressing plate around the positioning bolt, enabling the positioning pressing plate to cross over two sides of the positioning groove, enabling the clamping groove at the bottom of the positioning pressing plate to be clamped on the outer side of the welding bead hole sliding plate, and screwing the positioning bolt and the fastening bolt;
5) The temperature of the cooling liquid is regulated within the range of-25 ℃ to 5 ℃, and a cooling liquid inlet and a cooling liquid outlet of a cooling liquid pipeline in the welding platform are connected with a cooling machine, so that the cooling liquid circularly flows in the cooling liquid pipeline;
6) Overlaying the drop hammer sample through the weld bead hole by adopting a low-alloy overlaying electrode, wherein the welding current is controlled to be 180-200A;
7) And taking out the drop hammer test sample after welding, measuring the geometric dimension of the welding bead, and confirming to meet the standard requirement.
Compared with the prior art, the utility model has the beneficial effects that:
(1) The device has the advantages of simple structure, convenient operation, low manufacturing cost and reusability;
(2) The welding test efficiency is improved; a plurality of drop hammer samples can be welded at one time, and because circulating cooling liquid is introduced into the welding platform, the welding platform is not obviously heated after one batch of welding tests are completed, so that a plurality of batches of welding tests can be continuously carried out;
(3) The positioning pressing plate is directly pressed on the drop hammer sample, the welding bead holes can restrict cladding metal of the welding bead, the geometric dimension of the welding bead and the accuracy of the welding bead on the surface position of the drop hammer sample are ensured, and the success rate of welding tests is greatly improved;
(4) The accuracy of the drop hammer test is improved; the impact of external environment and electric arc high temperature on welding tests can be reduced, the problem of large drop test result discreteness caused by change of external environment and overheating of base materials in the welding process is avoided, and the drop test accuracy is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 is a schematic perspective view of a welding and clamping device for drop weight test specimens according to the present utility model.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic view of a weld bead length adjusting structure according to the present utility model.
Fig. 4 is a schematic view of a cooling structure according to the present utility model.
Reference numerals illustrate:
in the figure: 1. welding platform 2, positioning groove 3, positioning pressing plate 4, positioning bolt 5, fastening bolt 6, hanging ring 7, water inlet 8, water outlet 9, welding path length adjusting structure 91, welding path hole sliding plate 92, welding path hole base plate 93, welding path hole 10, drop hammer sample 11, cooling liquid pipe
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:
as shown in fig. 1 and 2, the welding clamping device for the drop hammer test sample comprises a welding platform 1, a welding bead length adjusting structure, a compacting structure and a cooling structure; a positioning groove 2 is formed in the top of the welding platform 1, a drop hammer sample 10 is placed in the positioning groove 2, a welding bead length adjusting structure is arranged on the top of the drop hammer sample 10, a welding bead hole 93 with adjustable length is formed in the welding bead length adjusting structure, and overlaying of the drop hammer sample 10 is performed in the welding bead hole 93; the pressing structure is used for pressing the welding bead length adjusting structure and the drop hammer test sample 10 in the positioning groove 2; the welding platform 1 is internally provided with a cooling structure.
Further, the number of the positioning grooves 2 is 1 to more, and when the number of the positioning grooves 2 is more than one, the positioning grooves 2 are parallel to each other.
Further, the positioning groove 2 can be used for placing 1 to a plurality of drop hammer samples 10, and the welding length adjusting structure is arranged in one-to-one correspondence with the drop hammer samples 10.
Further, as shown in fig. 3, the welding length adjusting structure is composed of 1 weld bead hole base plate 92 and 2 weld bead hole sliding plates 91; the width of the welding bead hole base plate 92 is matched with the width of the positioning groove 2 on the welding platform 1, the welding bead hole base plate 92 is provided with a sliding groove along the longitudinal through length, 2 welding bead hole sliding plates 91 are arranged in the sliding groove, and sliding rails are arranged on two sides of the welding bead hole sliding plates 91 to be matched with the sliding groove; the inner end of the weld bead hole sliding plate 91 is provided with a groove-shaped hole, one end of the groove-shaped hole is of an open structure, and the other end of the groove-shaped hole is of a semicircular closed structure; the slot-shaped holes are positioned right above the strip-shaped holes, the width of the slot-shaped holes is the same as that of the strip-shaped holes, the length of the strip-shaped holes is larger than the length of the strip-shaped holes after the 2 slot-shaped holes are combined, and the 2 slot-shaped holes and the strip-shaped holes form a weld bead hole 93 together.
Further, the compression structure consists of a positioning pressing plate 3, a positioning bolt 4 and a fastening bolt 5; the positioning pressing plate 3 stretches over the positioning groove 2, one end of the positioning pressing plate 3 is connected with the welding platform 1 through a positioning bolt 4, and the other end of the positioning pressing plate 3 is locked and fixed with the welding platform 1 through a fastening bolt 5; the bottom of the positioning pressing plate 3 is provided with a clamping groove matched with the welding bead length adjusting structure.
Further, the material of the welding bead length adjusting structure is red copper.
Further, as shown in fig. 4, the cooling structure is a cooling liquid pipeline 11, the cooling liquid pipeline 11 is arranged in a serpentine shape in the welding platform 1, one end of the cooling liquid pipeline 11 is provided with a cooling liquid inlet 7, the other end is provided with a cooling liquid outlet 8, and the cooling liquid inlet 7 and the cooling liquid outlet 8 are respectively connected with an external cooler.
Furthermore, hanging rings 6 are respectively arranged at four corners of the top of the welding platform 1.
Further, the compressing structure is longitudinally provided with a plurality of positioning bolts 4 and fastening bolts 5 on the adjacent 2 positioning pressing plates 3 along the positioning groove 2 in a reverse symmetrical mode.
The utility model relates to a use method of a welding clamping device for a drop hammer test sample, which comprises the following steps:
1) Pretreating the drop hammer sample 10 to expose the metallic luster of the surface to be welded, and cleaning and drying the surface to be welded;
2) Hoisting the welding platform 1 into a welding laboratory, and adjusting the temperature and the relative humidity in the welding laboratory to meet the test requirement;
3) Placing the pretreated drop hammer test sample 10 in a positioning groove 2 of a welding platform 1, and adjusting the relative positions of 2 welding bead hole sliding plates 91 in a welding bead hole base plate 91 according to test requirements to ensure that the length of a welding bead hole 93 is consistent with the test required welding bead length;
4) Loosening the positioning bolt 4, rotating the positioning pressing plate 3 around the positioning bolt 4, enabling the positioning pressing plate 4 to cross the two sides of the positioning groove 2, enabling the clamping groove at the bottom of the positioning pressing plate 3 to be clamped at the outer side of the welding bead hole sliding plate 91, and tightening the positioning bolt 4 and the fastening bolt 5;
5) The temperature of the cooling liquid is regulated within the range of-25 ℃ to 5 ℃, and a cooling liquid inlet 7 and a cooling liquid outlet 8 of a cooling liquid pipeline 11 in the welding platform 1 are connected with a cooling machine, so that the cooling liquid circularly flows in the cooling liquid pipeline 11;
6) A low-alloy surfacing electrode is adopted to carry out surfacing on the drop hammer sample 10 through a weld bead hole 93, and the welding current is controlled to be 180-200A;
7) And taking out the drop hammer test sample 10 after the welding is finished, measuring the geometric dimension of the welding bead, and confirming that the welding bead meets the standard requirement.
The length of the weld bead hole is generally controlled to be 20-65 mm according to the drop hammer test requirement.
The cooling fluid may be water or other liquid cooling medium.
The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present utility model, but the scope of the present utility model is not limited to the following examples.
[ example 1 ]
In this example, a drop weight welding test of a low temperature resistant steel plate for LNG storage tanks was performed. The operation process is as follows:
a. 6 drop hammer test pieces with the dimensions of 130mm (length) ×50mm (width) ×20mm (thickness) are prepared, the surfaces of the drop hammer test pieces are polished by sand paper, the surfaces to be welded are exposed to metallic luster, and the surfaces to be welded are wiped by alcohol and then naturally air-dried.
b. And a lifting device is connected with the lifting ring, the welding platform is lifted into a welding laboratory with adjustable temperature and humidity, and the temperature in the welding laboratory is adjusted to be 20 ℃ and the relative humidity is adjusted to be 30%.
c. Respectively placing the polished 6 drop hammer test pieces in positioning grooves on a welding platform, and adjusting the relative positions of 2 welding bead hole sliding plates in a welding bead hole base to ensure that the length of a welding bead hole is 35mm, the width of the welding bead hole is 13mm, and the total thickness of a welding bead hole base plate and the welding bead hole sliding plates is 5.5mm; a positioning pressing plate is respectively arranged above two ends of each drop hammer sample, and positioning bolts and fastening bolts on the 2 positioning pressing plates are reversely arranged.
d. And loosening the positioning bolts on the 2 positioning pressing plates, rotating the 2 positioning pressing plates around the positioning bolts to the direction vertical to the positioning sliding grooves, clamping the clamping grooves at the bottoms of the positioning pressing plates on the welding bead hole pressing plates above the drop hammer test sample, and tightening the positioning bolts and the fastening bolts to fix the position of the drop hammer test sample in the positioning grooves.
e. And regulating the temperature of cooling liquid in the cooling machine to be within the range of minus 15 ℃ to minus 10 ℃, and then respectively connecting a cooling liquid inlet and a cooling liquid outlet of a cooling liquid pipeline in the welding platform with the cooling machine to enable the cooling liquid to circularly flow in the welding platform through the cooling liquid pipeline.
f. And D127 welding rods are adopted to build up welding on the drop hammer test pieces, the welding current is controlled to be 180A, the welding is continuously carried out from one end of the weld bead hole to the other end, the welding process is uninterrupted, and the welding process ensures that the cladding metal does not overflow in the weld bead hole during build-up welding.
g. After the welding work of the drop hammer test sample is finished, the fastening bolt is loosened, the drop hammer test sample is taken out, the geometric dimension of the welding bead is 35mm multiplied by 13mm multiplied by 4.5mm, and the welding bead is well formed.
[ example 2 ]
In this example, a drop hammer welding test of a high-strength steel plate for a nuclear containment was performed. The operation process is as follows:
a. 6 drop hammer test pieces with the dimensions of 130mm (length) ×50mm (width) ×20mm (thickness) are prepared, the surfaces of the drop hammer test pieces are polished by sand paper, the surfaces to be welded are exposed to metallic luster, and the surfaces to be welded are wiped by alcohol and then naturally air-dried.
b. And a lifting device is connected with the lifting ring, the welding platform is lifted into a welding laboratory with adjustable temperature and humidity, and the temperature in the welding laboratory is adjusted to be 20 ℃ and the relative humidity is adjusted to be 30%.
c. Respectively placing the polished 6 drop hammer test pieces in positioning grooves on a welding platform, and adjusting the relative positions of 2 welding bead hole sliding plates in a welding bead hole base to enable the length of a welding bead hole to be 50mm, the width of the welding bead hole to be 13mm, and the total thickness of a welding bead hole base plate and the welding bead hole sliding plates to be 5.5mm; a positioning pressing plate is respectively arranged above two ends of each drop hammer sample, and positioning bolts and fastening bolts on the 2 positioning pressing plates are reversely arranged.
d. And loosening the positioning bolts on the 2 positioning pressing plates, rotating the 2 positioning pressing plates around the positioning bolts to the direction vertical to the positioning sliding grooves, clamping the clamping grooves at the bottoms of the positioning pressing plates on the welding bead hole pressing plates above the drop hammer test sample, and tightening the positioning bolts and the fastening bolts to fix the position of the drop hammer test sample in the positioning grooves.
e. And regulating the temperature of cooling liquid in the cooling machine to be within the range of minus 15 ℃ to minus 10 ℃, and then respectively connecting a cooling liquid inlet and a cooling liquid outlet of a cooling liquid pipeline in the welding platform with the cooling machine to enable the cooling liquid to circularly flow in the welding platform through the cooling liquid pipeline.
f. And D127 welding rods are adopted to build up welding on the drop hammer test pieces, the welding current is controlled to be 180A, the welding is continuously carried out from one end of the weld bead hole to the other end, the welding process is uninterrupted, and the welding process ensures that the cladding metal does not overflow in the weld bead hole during build-up welding.
g. After the welding work of the drop hammer test sample is finished, the fastening bolt is loosened, the drop hammer test sample is taken out, the geometric dimension of the welding bead is 50mm multiplied by 13mm multiplied by 4.5mm, and the welding bead is well formed.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (7)
1. The application method of the welding clamping device for the drop hammer test sample is characterized in that the welding clamping device comprises a welding platform, a welding bead length adjusting structure, a pressing structure and a cooling structure; a positioning groove is formed in the top of the welding platform, a drop hammer sample is placed in the positioning groove, a welding bead length adjusting structure is arranged at the top of the drop hammer sample, a welding bead hole with adjustable length is formed in the welding bead length adjusting structure, and overlaying of the drop hammer sample is performed in the welding bead hole; the compressing structure is used for compressing the welding bead length adjusting structure and the drop hammer sample in the positioning groove; a cooling structure is arranged inside the welding platform;
the welding bead length adjusting structure consists of 1 welding bead hole base plate and 2 welding bead hole sliding plates; the width of the welding path hole base plate is matched with the width of the positioning groove on the welding platform, the welding path hole base plate is provided with a sliding groove along the longitudinal through length, 2 welding path hole sliding plates are arranged in the sliding groove, and sliding rails are arranged on two sides of the welding path hole sliding plates and matched with the sliding groove; the inner end of the welding bead hole sliding plate is provided with a groove-shaped hole, one end of the groove-shaped hole is of an open structure, and the other end of the groove-shaped hole is of a semicircular closed structure; the surface of the weld bead hole substrate is provided with a strip hole, the groove-shaped hole is positioned right above the strip hole, the width of the groove-shaped hole is the same as that of the strip hole, the length of the strip hole is greater than the length of the strip hole after the 2 groove-shaped holes are combined, and the 2 groove-shaped holes and the strip hole form the weld bead hole together;
the compression structure consists of a positioning pressing plate, a positioning bolt and a fastening bolt; the positioning pressing plate stretches over the positioning groove, one end of the positioning pressing plate is connected with the welding platform through a positioning bolt, and the other end of the positioning pressing plate is locked and fixed with the welding platform through a fastening bolt; the bottom of the positioning pressing plate is provided with a clamping groove matched with the welding bead length adjusting structure;
the application method of the welding clamping device for the drop hammer test sample comprises the following steps of:
1) Pretreating the drop hammer sample to expose the metallic luster of the surface to be welded, and cleaning and drying the surface to be welded;
2) Hoisting the welding platform into a welding laboratory, and adjusting the temperature and the relative humidity in the welding laboratory to meet the test requirement;
3) Placing the pretreated drop hammer sample in a positioning groove of a welding platform, and adjusting the relative positions of 2 welding bead hole sliding plates in a welding bead hole base plate according to test requirements to ensure that the welding bead hole length is consistent with the welding bead length required by the test;
4) Loosening the positioning bolt, rotating the positioning pressing plate around the positioning bolt, enabling the positioning pressing plate to cross over two sides of the positioning groove, enabling the clamping groove at the bottom of the positioning pressing plate to be clamped on the outer side of the welding bead hole sliding plate, and screwing the positioning bolt and the fastening bolt;
5) The temperature of the cooling liquid is regulated within the range of-25 ℃ to 5 ℃, and a cooling liquid inlet and a cooling liquid outlet of a cooling liquid pipeline in the welding platform are connected with a cooling machine, so that the cooling liquid circularly flows in the cooling liquid pipeline;
6) Overlaying the drop hammer sample through the weld bead hole by adopting a low-alloy overlaying electrode, wherein the welding current is controlled to be 180-200A;
7) And taking out the drop hammer test sample after welding, measuring the geometric dimension of the welding bead, and confirming to meet the standard requirement.
2. The method of using a welding and clamping device for drop weight test specimens according to claim 1, wherein the number of the positioning grooves is 1 to more, and when the number of the positioning grooves is more, the positioning grooves are parallel to each other.
3. The method for using the welding clamping device for drop test samples according to claim 1, wherein 1 to a plurality of drop test samples can be placed in the positioning groove, and the weld bead length adjusting structures are arranged in one-to-one correspondence with the drop test samples.
4. The welding and clamping device for drop test specimens according to claim 1, wherein the weld bead length adjusting structure is made of red copper.
5. The method for using the welding clamping device for drop hammer test samples according to claim 1, wherein the cooling structure is a cooling liquid pipeline, the cooling liquid pipeline is arranged in a serpentine shape in the welding platform, one end of the cooling liquid pipeline is provided with a cooling liquid inlet, the other end of the cooling liquid pipeline is provided with a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are respectively connected with an external cooler.
6. The method for using the welding clamping device for drop hammer test samples according to claim 1, wherein hanging rings are respectively arranged at four corners of the top of the welding platform.
7. The method for using the welding clamping device for drop hammer test samples according to claim 1, wherein the pressing structure is longitudinally provided with a plurality of positioning bolts and fastening bolts on the adjacent 2 positioning pressing plates in opposite symmetry along the positioning groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211045294.0A CN115351401B (en) | 2022-08-30 | 2022-08-30 | Welding clamping device for drop hammer test sample and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211045294.0A CN115351401B (en) | 2022-08-30 | 2022-08-30 | Welding clamping device for drop hammer test sample and use method thereof |
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| CN115351401B true CN115351401B (en) | 2023-11-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011108135A1 (en) * | 2010-03-04 | 2011-09-09 | 新日本製鐵株式会社 | Method for determination of brittle crack propagation stopping performance in high-intensity thick steel plate |
| CN206952423U (en) * | 2016-12-29 | 2018-02-02 | 哈电集团（秦皇岛）重型装备有限公司 | It is a kind of to be used to preparing metal and drop hammer the frock of test specimen |
| CN107931824A (en) * | 2017-11-28 | 2018-04-20 | 重庆派馨特机电有限公司 | Agitating friction mounted welder with refrigerating function |
| CN213437119U (en) * | 2020-09-04 | 2021-06-15 | 风帆有限责任公司 | Storage battery busbar cast welding mold with strong universality |
| CN217166890U (en) * | 2021-11-26 | 2022-08-12 | 鞍钢股份有限公司 | Drop hammer sample crackle source welding bead welding auxiliary platform |
-
2022
- 2022-08-30 CN CN202211045294.0A patent/CN115351401B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011108135A1 (en) * | 2010-03-04 | 2011-09-09 | 新日本製鐵株式会社 | Method for determination of brittle crack propagation stopping performance in high-intensity thick steel plate |
| CN206952423U (en) * | 2016-12-29 | 2018-02-02 | 哈电集团（秦皇岛）重型装备有限公司 | It is a kind of to be used to preparing metal and drop hammer the frock of test specimen |
| CN107931824A (en) * | 2017-11-28 | 2018-04-20 | 重庆派馨特机电有限公司 | Agitating friction mounted welder with refrigerating function |
| CN213437119U (en) * | 2020-09-04 | 2021-06-15 | 风帆有限责任公司 | Storage battery busbar cast welding mold with strong universality |
| CN217166890U (en) * | 2021-11-26 | 2022-08-12 | 鞍钢股份有限公司 | Drop hammer sample crackle source welding bead welding auxiliary platform |
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| CN115351401A (en) | 2022-11-18 |
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