CN111766094A - Sampling method for butt joint of round steel and pipe - Google Patents
Sampling method for butt joint of round steel and pipe Download PDFInfo
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- CN111766094A CN111766094A CN202010425134.3A CN202010425134A CN111766094A CN 111766094 A CN111766094 A CN 111766094A CN 202010425134 A CN202010425134 A CN 202010425134A CN 111766094 A CN111766094 A CN 111766094A
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- round steel
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- steel pipe
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 165
- 239000010959 steel Substances 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005070 sampling Methods 0.000 title claims abstract description 25
- 210000001503 joint Anatomy 0.000 title claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 73
- 238000005452 bending Methods 0.000 claims abstract description 18
- 239000006247 magnetic powder Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 4
- 230000035515 penetration Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract 2
- 230000004927 fusion Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
Abstract
The invention discloses a method for sampling a butt joint of round steel and a pipe, which comprises the following steps: taking two round steel and a round steel pipe which are equal in diameter and at least 150mm in length, machining a boss at one end of the round steel, wherein the boss penetrates into the round steel pipe, machining grooves which are 30 degrees with the end faces on the aligned end faces of the round steel and the round steel pipe respectively, and forming a 6-8 mm groove gap at the root parts of the grooves of the round steel and the round steel pipe; according to the welding process, welding is carried out on the round steel and the round steel pipe at the groove; after the welding seam is cooled, detecting appearance, magnetic powder or penetration and ultrasonic waves of the welding seam so as to meet relevant process requirements; a plurality of side bending samples, plate-shaped tensile samples, welding seam macroscopic sections, hardness samples and welding impact samples are cut in the axial direction of round steel and round steel tubes by a wire cut electrical discharge machine, the side bending samples, the plate-shaped tensile samples, the welding seam macroscopic sections, the hardness samples and the welding impact samples all comprise welding seams, and the method provides guarantee for verifying the rationality and the safety of a welding process.
Description
Technical Field
The application relates to a sampling method of a sample, in particular to a sampling method of a butt joint of round steel and a pipe.
Background
The lifting shaft in the lifting appliance is usually made of round steel, and the stress conditions in the same lifting shaft are different according to the structural characteristics, stress and the like. The steel pipe has a hollow cross section, and when the same bending strength and torsion strength are required, the required weight of the steel pipe is lighter than that of the round steel, and in order to fully exert the performance of materials and reduce the weight of the lifting appliance, the butt joint of the round steel and the pipe is arranged in part of lifting shafts of the lifting appliance. The joints are stressed welding seams and often bear the comprehensive action of bending moment, torque and tension, and once the joints fail, the instability and the damage of a lifting appliance component can be caused, so that the lifting appliance can be permanently damaged, and a lifted object can also be lost and can injure workers. For this reason, a reasonable welding joint and a strict welding process need to be established for such a joint. In order to verify the correctness and rationality of the welding process and to verify the overall performance of the welded joint, a welding process evaluation test is required. However, in China and abroad, the evaluation and sampling of the welding process of the welding joint of the round steel and the steel pipe is still blank.
Disclosure of Invention
The invention aims to fill the blank of a sampling method for a welded joint of round steel and a steel pipe, and provides a sampling method for a butt joint of the round steel and the pipe.
The invention relates to a method for sampling a butt joint of round steel and a pipe, which comprises the following steps: it comprises the following steps:
(1) taking two round steels and round steel pipes with equal diameters and lengths of at least 150mm, processing a boss at one end of each round steel, wherein the boss extends into each round steel pipe, processing grooves which are 30 degrees with the end faces on the aligned end faces of the round steels and the round steel pipes respectively, forming a groove gap of 6-8 mm at the root parts of the grooves of the round steels and the round steel pipes, and using the boss extending out of the round steel 1 as the root part of a welding seam;
(2) welding the groove of the round steel and the round steel pipe according to a welding process, and finally forming a complete welding seam between the round steel and the groove of the round steel pipe;
(3) after the welding seam is cooled, detecting appearance, magnetic powder or penetration and ultrasonic waves of the welding seam so as to meet relevant process requirements;
(4) the wire-electrode cutting machine is used for cutting one or more samples of a plurality of side bending samples, plate-shaped tensile samples, welding seam macroscopic sections, hardness samples and welding impact samples in the axial direction of round steel and round steel tubes, and the side bending samples, the plate-shaped tensile samples, the welding seam macroscopic sections, the hardness samples and the welding impact samples all contain welding seams.
The invention relates to a method for sampling a butt joint of round steel and a pipe, which comprises the following steps: the lateral bending sample is 4, and the cross section of lateral bending sample is the rectangle, and a border of rectangle is round steel and circular steel tube direction of radius, and its length is the wall thickness of circular steel tube, and another border of rectangle is the circumferencial direction of round steel and circular steel tube, and its length is 10 mm.
The invention relates to a method for sampling a butt joint of round steel and a pipe, which comprises the following steps: the number of the plate-shaped tensile samples is 2, the cross section of each plate-shaped tensile sample is rectangular, one edge of each rectangle is along the radius direction of the round steel and the round steel pipe, the length of each rectangle is equal to the wall thickness of the round steel pipe, the other edge of each rectangle is along the circumferential direction of the round steel and the round steel pipe, and when the diameter of the round steel is less than or equal to 50mm, the length of the other edge of each plate-shaped tensile sample is 18 mm; when the diameter of the round steel 1 is more than 50mm, the length of the other side of the plate-shaped tensile sample is 24 mm.
The invention relates to a method for sampling a butt joint of round steel and a pipe, which comprises the following steps: the welding seam macroscopic section and the hardness sample are 1, the cross sections of the welding seam macroscopic section and the hardness sample are rectangular, one edge of the rectangle is along the radius direction of the round steel and the round steel pipe, the length of the rectangle is the wall thickness of the round steel pipe, the other edge of the rectangle is along the circumferential direction of the round steel and the round steel pipe, and the length of the rectangle is 20-25 mm.
The invention relates to a method for sampling a butt joint of round steel and a pipe, which comprises the following steps: the welding impact sample is 9, and the cross section of welding impact sample is the square, and they are taken from 2mm departments of round steel and circular steel tube cylinder surface below, and a limit of square is along first round steel and second round steel radial direction, and its length is 10mm, and another limit of square is along the circumferencial direction of first round steel and second round steel, and its length is 10 mm.
The invention relates to a method for sampling a butt joint of round steel and a pipe, which comprises the following steps: the round steel and the round steel pipe are made of the same material or different materials.
The round steel and pipe butt joint sampling method provided by the invention comprehensively tests performance indexes such as bending, impact, stretching, fusion state, hardness and the like of the welding joint, combines special conditions, gives sampling positions and sampling methods of various samples, and provides support for verifying the rationality of the welding process and the safety of the welding joint; the reasonable welding joint is designed, the welding difficulty of the joint is reduced while the good fusion welding joint is obtained, the good fusion welding joint can be obtained, the guarantee is provided for the subsequent sampling, various performances of the joint are comprehensively tested, and the guarantee is provided for verifying the rationality of the welding process and the safety of the welding joint.
Drawings
The invention is further explained below with reference to the drawings and the examples.
FIG. 1 is a schematic longitudinal cross-section of a round steel and round steel tube welded joint of the present invention;
FIG. 2 is a schematic cross-sectional view taken at A-A of FIG. 1;
fig. 3 is an enlarged sectional view of the weld of the round steel and the round steel pipe of the present invention.
In fig. 1 to 3, reference numeral 1 is a round bar; the reference number 2 is a round steel pipe; reference numeral 3 is a lateral bending sample; reference numeral 4 is a plate-like tensile specimen; reference numeral 5 is a welding impact specimen; reference numeral 6 denotes a wire electric discharge machine; reference numeral 7 is a weld; reference numeral 8 denotes a boss; and 9, a welding seam macroscopic section and a hardness sample.
Detailed Description
The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the method for sampling a butt joint of round steel and a pipe material of the present invention comprises the steps of:
(1) the method comprises the following steps of taking two round steel 1 and a round steel pipe 2 which are equal in diameter and at least 150mm in length, wherein the round steel 1 and the round steel pipe 2 are made of the same material or different materials, processing a boss 8 at one end of the round steel 1, the boss 8 extends into the round steel pipe 2, processing grooves which are 30 degrees with end faces on the aligned end faces of the round steel 1 and the round steel pipe 2 respectively, forming a groove gap of 6-8 mm at the root of the groove of the round steel 1 and the round steel pipe 2, and using the boss 8 extending out of the round steel 1 as the root of a welding line;
(2) welding the bevels of the round steel 1 and the round steel pipe 2 according to a welding process, and finally forming a complete welding seam 7 between the bevels of the round steel 1 and the round steel pipe 2;
(3) after the welding seam 7 to be welded is cooled, detecting the appearance, magnetic powder or penetration and ultrasonic waves of the welding seam 7 so as to meet the relevant technological requirements;
(4) the wire-electrode cutting machine 6 is used for cutting one or more of a plurality of side bending samples 3, plate-shaped tensile samples 4, welding seam macroscopic sections, hardness samples 9 and welding impact samples 5 in the axial direction of round steel 1 and round steel tubes 2, and the side bending samples 3, the plate-shaped tensile samples 4, the welding seam macroscopic sections, the hardness samples 9 and the welding impact samples 5 all comprise welding seams 7.
The number of the plate-shaped tensile samples 4 is 2, the cross section of each plate-shaped tensile sample 4 is rectangular, one side of each rectangle is along the radius direction of the round steel 1 and the round steel pipe 2, the length of each rectangle is equal to the wall thickness of the round steel pipe 2, the other side of each rectangle is along the circumferential direction of the round steel 1 and the round steel pipe 2, and when the diameter of the round steel 1 is less than or equal to 50mm, the length of the other side of each plate-shaped tensile sample 4 is 18 mm; when the round steel 1 has a diameter of more than 50mm, the length of the other side of the plate-like tensile specimen 4 is 24 mm.
The welding seam macroscopic section and the hardness sample 9 are 1, the cross section of the welding seam macroscopic section and the cross section of the hardness sample 9 are rectangular, one side of the rectangle is along the radius direction of the round steel 1 and the round steel pipe 2, the length of the rectangle is the wall thickness of the round steel pipe 2, and the other side of the rectangle is along the circumferential direction of the round steel 1 and the round steel pipe 2, and the length of the rectangle is 20-25 mm.
Welding impact sample 5 is 9, and welding impact sample 5's cross section is the square, and they are taken from 2mm departments of round steel 1 and 2 cylindrical surface below of circular steel pipe, and a limit of square is along first round steel 1 and 2 direction of radius of second round steel, and its length is 10mm, and another limit of square is along the circumferencial direction of first round steel 1 and second round steel 2, and its length is 10 mm.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (6)
1. A sampling method for a butt joint of round steel and a pipe is characterized by comprising the following steps:
(1) the method comprises the following steps of taking two round steel (1) and a round steel pipe (2) with equal diameter and at least 150mm in length, processing a boss (8) at one end of the round steel (1), wherein the boss (8) extends into the round steel pipe (2), processing the aligned end faces of the round steel (1) and the round steel pipe (2) into grooves with the end faces of 30 degrees respectively, forming a groove gap of 6-8 mm at the root of the groove of the round steel (1) and the round steel pipe (2), and taking the boss (8) extending out of the round steel (1) as the root of a welding seam;
(2) welding the grooves of the round steel (1) and the round steel pipe (2) according to a welding process, and finally forming a complete welding seam (7) between the grooves of the round steel (1) and the round steel pipe (2);
(3) after the welding seam (7) is cooled, detecting the appearance, magnetic powder or permeation and ultrasonic waves of the welding seam (7) so as to meet the relevant process requirements;
(4) the wire-electrode cutting machine is used for cutting one or more samples of a plurality of side bending samples (3), plate-shaped tensile samples (4), welding seam macroscopic sections, hardness samples (9) and welding impact samples (5) in the axial direction of round steel (1) and round steel tubes (2) by the wire-electrode cutting machine (6), and the side bending samples (3), the plate-shaped tensile samples (4), the welding seam macroscopic sections, the hardness samples (9) and the welding impact samples (5) all contain welding seams (7).
2. The method for sampling the butt joint of the round steel and the pipe according to claim 1, wherein: the lateral bending test piece (3) is 4, the cross section of the lateral bending test piece (3) is rectangular, one side of the rectangle is along the radius direction of the round steel (1) and the round steel tube (2), the length of the rectangular side is the wall thickness of the round steel tube (2), the other side of the rectangle is along the circumferential direction of the round steel (1) and the round steel tube (2), and the length of the rectangular side is 10 mm.
3. The method for sampling the butt joint of the round steel and the pipe according to claim 1, wherein: the number of the plate-shaped tensile samples (4) is 2, the cross section of each plate-shaped tensile sample (4) is rectangular, one side of each rectangle is along the radius direction of the round steel (1) and the round steel pipe (2), the length of each rectangle is the wall thickness of the round steel pipe (2), the other side of each rectangle is along the circumferential direction of the round steel (1) and the round steel pipe (2), and when the diameter of the round steel (1) is less than or equal to 50mm, the length of the other side of each plate-shaped tensile sample (4) is 18 mm; when the diameter of the round steel (1) is larger than 50mm, the length of the other side of the plate-shaped tensile sample (4) is 24 mm.
4. The method for sampling the butt joint of the round steel and the pipe according to claim 1, wherein: the welding seam macroscopic section and the hardness sample (9) are 1, the cross section of the welding seam macroscopic section and the cross section of the hardness sample (9) are rectangular, one side of the rectangle is along the radius direction of the round steel (1) and the round steel pipe (2), the length of the rectangle is the wall thickness of the round steel pipe (2), and the other side of the rectangle is along the circumferential direction of the round steel (1) and the round steel pipe (2), and the length of the rectangle is 20-25 mm.
5. The method for sampling the butt joint of the round steel and the pipe according to claim 1, wherein: welding impact specimen (5) are 9, and the cross section of welding impact specimen (5) is the square, and they are taken from round steel (1) and round steel pipe (2) cylinder surface below 2mm department, and a limit of square is along first round steel (1) and second round steel (2) direction of radius, and its length is 10mm, and another limit of square is along the circumferencial direction of first round steel (1) and second round steel (2), and its length is 10 mm.
6. A method for sampling a butt joint of round steel and a pipe according to claim 2, 3, 4 or 5, wherein: the round steel (1) and the round steel pipe (2) are made of the same material or different materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425134.3A CN111766094A (en) | 2020-05-19 | 2020-05-19 | Sampling method for butt joint of round steel and pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425134.3A CN111766094A (en) | 2020-05-19 | 2020-05-19 | Sampling method for butt joint of round steel and pipe |
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| CN111766094A true CN111766094A (en) | 2020-10-13 |
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| CN202010425134.3A Pending CN111766094A (en) | 2020-05-19 | 2020-05-19 | Sampling method for butt joint of round steel and pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629912A (en) * | 2020-11-30 | 2021-04-09 | 武汉金牛经济发展有限公司 | Method for quickly slicing pipe fitting connector of steel-plastic composite pipe |
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| CN201950377U (en) * | 2010-12-24 | 2011-08-31 | 上海锅炉厂有限公司 | Improved heterogenous steel pipe welding butt joint nozzle type |
| CN105397435A (en) * | 2015-12-30 | 2016-03-16 | 中国航空工业集团公司北京航空制造工程研究所 | Preparing method of pipe welded joint fracture toughness testing sample |
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| CN110879157A (en) * | 2019-09-29 | 2020-03-13 | 宝鸡石油机械有限责任公司 | Sampling method for evaluating welding process of round bar full penetration joint |
-
2020
- 2020-05-19 CN CN202010425134.3A patent/CN111766094A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201783766U (en) * | 2010-08-10 | 2011-04-06 | 上海锅炉厂有限公司 | Improved special steel tube butt connector groove |
| CN201950377U (en) * | 2010-12-24 | 2011-08-31 | 上海锅炉厂有限公司 | Improved heterogenous steel pipe welding butt joint nozzle type |
| CN205103105U (en) * | 2015-11-25 | 2016-03-23 | 华北电力科学研究院有限责任公司 | Xenogenesis pipe welding connects high temperature strength and notch sensitivity test sample |
| CN105397435A (en) * | 2015-12-30 | 2016-03-16 | 中国航空工业集团公司北京航空制造工程研究所 | Preparing method of pipe welded joint fracture toughness testing sample |
| CN208333230U (en) * | 2018-06-05 | 2019-01-04 | 中石油华东设计院有限公司 | A kind of heat exchanger heat-exchanging tube and tube sheet connection end structure |
| CN110879157A (en) * | 2019-09-29 | 2020-03-13 | 宝鸡石油机械有限责任公司 | Sampling method for evaluating welding process of round bar full penetration joint |
Non-Patent Citations (1)
| Title |
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| 吴宗泽 主编: "《机械设计实用手册》", 31 January 1999 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629912A (en) * | 2020-11-30 | 2021-04-09 | 武汉金牛经济发展有限公司 | Method for quickly slicing pipe fitting connector of steel-plastic composite pipe |
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Application publication date: 20201013 |