CN105486580A - Method for detecting extruding and welding strength of magnesium hollow section bar - Google Patents
Method for detecting extruding and welding strength of magnesium hollow section bar Download PDFInfo
- Publication number
- CN105486580A CN105486580A CN201510875404.XA CN201510875404A CN105486580A CN 105486580 A CN105486580 A CN 105486580A CN 201510875404 A CN201510875404 A CN 201510875404A CN 105486580 A CN105486580 A CN 105486580A
- Authority
- CN
- China
- Prior art keywords
- core rod
- cylindrical pins
- exemplar
- brace
- detected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention provides a method for detecting the extruding and welding strength of a magnesium hollow section bar. The method comprises the following steps: making a detection device; detecting: making a first die core and a second die core according to the shape and the size of a detected sample, and inserting the detected sample between the first die core and the second die core; fixedly arranging a first U-shaped stretching connection piece at the fixed end and the free end of a stretcher; starting the stretcher, stretching until the detected sample cracks under the action of pulling force, and finishing stretcher data after test ends; and analyzing the data to determine the strength of a weld position and a weldless position. The method has the advantages of simple operation, and rapid and true detection of the extruding and welding strength of the magnesium hollow section bar; and compared with numerical simulation strength detection methods, the method provided by the invention is direct and true, can be generally applied in practical production, can check defective products, and avoids hidden quality and safety troubles induced of entrance of products with unsatisfactory performances to the market. 30% of cracking loss of products is avoided after rejecting products with poor performances.
Description
Technical field
The present invention relates to a kind of detection method of magnesium alloy hollow extrusion Weld strength.
Background technology
Bridge die extrusion is high with production efficiency, the cycle is short, and the advantages such as section complexity, section bar that Wall-Thickness Difference is large can be produced obtain in recent years and develop rapidly, and be widely used in and the extruder not with separate perforate system produce the civilian of all size and military tubing and hollow profile.But can bridge die extrusion also exists the rear two strands of metal flows of shunting under high temperature high extruding force, extrude seam difficult point together in high quality again.
Compared with other positions of section bar, the mechanical property at longitudinal seam line place is poor, and the position that in normally whole hollow profile, intensity is minimum, section bar often first destroys herein.In addition, mold diversion hole number is more, and corresponding seam number of lines is more, and the inner potential seam defect of complicated big cross section hollow profile is more.
Therefore, in today that complicated big cross section hollow magnesium profile applications is increasingly extensive, require day by day to improve to magnesium alloy strength, according to the widespread use of magnesium alloy profiles, more outstanding to the requirement of strength of extruding seam accordingly.
The research in this field is greatly mainly with based on computer simulation at present, proves welding quality by analog parameter.Also having combines seam criterion with numerical simulation is study at present to extrude the most frequently used method of seam, by carrying out numerical simulation to magnesium profile extrusion seam process, extracting the related data on seam face, then utilizing seam criterion calculating Weld strength.
In order to realize the site operative of intensity detection, obtaining simultaneously and extruding Weld strength really, being eager to research and develop a kind of detection method for detecting hollow magnesium alloy profiles extruding Weld strength.
Summary of the invention
For deficiency of the prior art, the object of this invention is to provide a kind of detection method of magnesium alloy hollow extrusion Weld strength, thus judge whether product strength meets request for utilization, avoid defective products to occur.
For achieving the above object, the technical solution used in the present invention is to provide a kind of detection method of magnesium alloy hollow extrusion Weld strength, and the method coordinates tension equipment to realize by making cubing, and the method comprises the following steps:
1) cubing is made
The structure of described cubing includes the first core rod, the second core rod, first cylindrical pins, the second cylindrical pins, first U-shaped stretching brace, the second U-shaped stretching brace, described first core rod, the second core rod there are respectively the first core rod through hole, the second core rod through hole, through hole on first core rod, the second core rod is through corresponding the first cylindrical pins, the second cylindrical pins, cylindrical pins protrudes from the annulus at the first core rod, the second core surface two ends, annulus is socketed respectively the first U-shaped stretching brace, the second U-shaped stretching brace; First U-shaped stretching brace, the second U-shaped stretching brace two ends connect the first jaw and second jaw of stretcher respectively;
2) detecting step
According to shape and the size of detected exemplar, make first core rod, second core rod same with the shape and size that detect exemplar, after first core rod and the second core rod splice, shape and detected exemplar equally, are dimensioned slightly smaller than detected exemplar, are filled in by spliced core rod in detected exemplar;
First U-shaped stretching brace is fixed on the first jaw of drawing machine stiff end, the second U-shaped stretching brace is connected with the second jaw of drawing machine movable end;
Run through two circular holes, the first core rod circular hole of the first U-shaped brace other end by the first cylindrical pins, make it firmly connect;
Run through two circular holes, the second core rod circular hole of the second U-shaped brace other end by the second cylindrical pins, make it firmly connect;
Check the first cylindrical pins, that the second cylindrical pins two ends lean out length is consistent, guarantee that the process that draws high can not come off;
Drawing machine stretching pulling force is set as 200KN; Draw speed is set as 5mm/ minute;
After installation, start drawing machine and start to stretch, slowly stretch to contrary both direction, until detected exemplar ftractures under tension, off-test, takes off each parts, arranges drawing machine data;
By being detected to the analysis of data the size that exemplar fracture position bears pulling force, judge the height of seam seam position and non-seam position intensity.
Effect of the present invention is that this method is simple to operate, effective, the intensity that magnesium alloy hollow extrusion welds can be detected fast really, compared with numerical simulation strength detecting method, this method is more directly truer, can be widely used in actual production, investigation defective products, avoids performance not reach the product introduction market of requirement and the quality, the potential safety hazard that cause.In addition, in magnesium alloy hollow profile deformation processing as bending, flattening, the draw, expand tube etc.Because early stage does not carry out detection screening to the seam performance of magnesium alloy hollow profile, in deformation process, there is 30% tubing to occur cracking, cause loss due to spoiled work, if use the method to detect before tubular object extruding, reject the lower part of performance and will avoid occurring the loss of product cracking.
Accompanying drawing explanation
Fig. 1-1,1-2 are core rod front view of the present invention and side view respectively;
Front view when Fig. 2 is stretching experiment of the present invention work;
Side view when Fig. 3 is stretching experiment of the present invention work.
In figure:
1, detected exemplar 2, first core rod 3, second core rod 4, first U-shaped stretching brace
5, the second U-shaped stretching brace 6, first cylindrical pins 7, second cylindrical pins
8, the first core rod through hole 9, second core rod through hole 10, first jaw 11, second jaw
Embodiment
By reference to the accompanying drawings and the detection method of embodiment to magnesium alloy hollow extrusion Weld strength of the present invention be illustrated.
The detection method of magnesium alloy hollow extrusion Weld strength of the present invention, the method coordinates tension equipment to realize by making cubing, and the method comprises the following steps:
1) cubing is made
The structure of described cubing includes the first core rod 2, second core rod 3, first cylindrical pins 6, second cylindrical pins 7, first U-shaped stretching brace 4, second U-shaped stretching brace 5, described first core rod 2, second core rod 3 there is the first core rod through hole 8, second core rod through hole 9 respectively, through hole on first core rod 2, second core rod 3 is through the first corresponding cylindrical pins 6, second cylindrical pins 7, cylindrical pins protrudes from the annulus at the first surperficial two ends of core rod 2, second core rod 3, annulus is socketed respectively the first U-shaped stretching brace 4, second U-shaped stretching brace 5; First U-shaped stretching brace 4, second U-shaped stretching brace 5 two ends connect the first jaw 10 and the second jaw 11 of stretcher respectively.
2) detecting step
According to shape and the size of detected exemplar, make first core rod 2, second core rod 3 same with the shape and size that detect exemplar, first core rod 2 and the second core rod 3 splices rear shape and detected exemplar is same, be dimensioned slightly smaller than detected exemplar, spliced core rod filled in detected exemplar;
First U-shaped stretching brace 4 is fixed on the first jaw 10 of drawing machine stiff end, the second U-shaped stretching brace 5 is connected with the second jaw 11 of drawing machine movable end;
Run through two circular holes, the first core rod circular hole of the first U-shaped brace other end by the first cylindrical pins 6, make it firmly connect;
Run through two circular holes, the second core rod circular hole of the second U-shaped brace other end by the second cylindrical pins 7, make it firmly connect.
Check that the first cylindrical pins 6, second cylindrical pins 7 two ends lean out length consistent, guarantee that the process that draws high can not come off.
Drawing machine stretching pulling force is set as 200KN; Draw speed is set as 5mm/ minute;
After installation, start drawing machine and start to stretch, slowly stretch to contrary both direction, until detected exemplar 1 ftractures under tension, off-test, takes off each parts, arranges drawing machine data;
By being detected the size that exemplar 1 fracture position bears pulling force to the analysis of data, judge the height of seam seam position and non-seam position intensity.
Described first core rod 2 and the second core rod 3 are the symmetric shape of triangle cylindricality, square, semicolumn, can be spliced into the shape of detected exemplar size, be dimensioned slightly smaller than detected exemplar, can fill in detected exemplar.
Run through two circular holes, the first core rod circular hole of the first U-shaped brace other end by pin 6, make it firmly connect.Run through two circular holes, the second core rod circular hole of the second U-shaped brace other end by pin 7, make it firmly connect.Check that the first cylindrical pins 6, second cylindrical pins 7 two ends lean out length consistent, guarantee that the process that draws high can not come off.Drawing machine stretching pulling force is set as 200KN; Draw speed is set as 5mm/ minute.
After installation, start drawing machine and start to stretch, slowly stretch to contrary both direction, until detected exemplar 1 ftractures under tension, off-test, takes off each parts, arranges drawing machine data;
By being detected the size that exemplar 1 fracture position bears pulling force to the analysis of data, judge the height of seam seam position and non-seam position intensity.
As shown in Figure 3, the implementation procedure of the detection method of extruding Weld strength of the present invention:
One, checkout equipment: lab stretcher
Two, cubing makes
Be triangle exemplar first core rod 2, second core rod 3 as Fig. 1 processes two pieces cross section, and on cross section respectively drill diameter be first core rod through hole 8, the second core rod through hole 9 of 6.2mm.
Vehicle Processing two diameters are 6mm, and length is first cylindrical pins 6, second cylindrical pins 7 of 18mm.
By width be 12mm, thickness is that the iron plate of 3mm is converted into and shown two pieces first U-shaped stretching brace 4, second U-shaped stretching brace 5, and is the circular hole of 6.2mm at junction drill diameter, be convenient to the first cylindrical pins 6, second cylindrical pins 7 and penetrate.
Length is become to be 10mm segment exemplar 1 sawing detected shown in Fig. 1.
Three, experimental technique:
1, when detected exemplar is square magnesium alloy pipe, the first core rod 2 and the second core rod 3 two pieces of triangle core rods two hypotenuses are alignd, is combined in square tubing, fill in the middle of detected exemplar 1.
2, the circular hole of the first U-shaped stretching brace 4, second U-shaped stretching brace 5 is aligned with the first core rod through hole 8, second core rod through hole 9 respectively, again the first cylindrical pins 6, second cylindrical pins 7 is penetrated in through hole respectively, the first core rod 2, second core rod 3 and the first U-shaped stretching brace 4, second U-shaped stretching brace 5 are connected as one.
3, the first U-shaped stretching brace 4 is fixed on the first jaw 10 of drawing machine stiff end, the second U-shaped stretching brace 5 is connected with drawing machine movable end second jaw 11.
4, check that the first cylindrical pins 6, second cylindrical pins 7 two ends lean out length consistent, guarantee that the process that draws high can not come off.
5, stretching pulling force setting 200KN; Draw speed setting 5mm/ minute.
6, after installation, start drawing machine and start to stretch, slowly stretch to contrary both direction, until detected exemplar 1 ftractures under tension, off-test, takes off each parts, arranges drawing machine data.
7, by the analysis to data, fracture position bears the size of pulling force, judges the height of seam seam position and non-seam position intensity; Thus judge whether magnesium alloy hollow profile can use as load-bearing material, stop because improper quality, the potential safety hazard caused of material selection.
Claims (2)
1. a detection method for magnesium alloy hollow extrusion Weld strength, the method coordinates tension equipment to realize by making cubing, and the method comprises the following steps:
1) cubing is made
The structure of described cubing includes the first core rod (2), second core rod (3), first cylindrical pins (6), second cylindrical pins (7), first U-shaped stretching brace (4), second U-shaped stretching brace (5), described first core rod (2), second core rod (3) there is respectively the first core rod through hole (8), second core rod through hole (9), first core rod (2), through hole on second core rod (3) is through corresponding the first cylindrical pins (6), second cylindrical pins (7), cylindrical pins protrudes from the first core rod (2), second core rod (3) surface, outstanding cylindrical pins is socketed in the first U-shaped stretching brace (4), on the annulus at the second U-shaped stretching brace (5) U-shaped two ends, first U-shaped stretching brace (4), the second U-shaped stretching brace (5) two ends connect the first jaw (10) and second jaw (11) of stretcher respectively,
2) detecting step
According to shape and the size of detected exemplar, make first core rod (2), second core rod (3) same with the shape and size that detect exemplar, first core rod (2) and the second core rod (3) splicing after shape and detected exemplar same, be dimensioned slightly smaller than detected exemplar, spliced core rod filled in detected exemplar;
First U-shaped stretching brace (4) is fixed on first jaw (10) of drawing machine stiff end, the second U-shaped stretching brace (5) is connected with second jaw (11) of drawing machine movable end;
Run through two circular holes, the first core rod circular hole of the first U-shaped brace other end by the first cylindrical pins (6), make it firmly connect;
Run through two circular holes, the second core rod circular hole of the second U-shaped brace other end by the second cylindrical pins (7), make it firmly connect;
Check the first cylindrical pins (6), that the second cylindrical pins (7) two ends lean out length is consistent, guarantee that the process that draws high can not come off;
Drawing machine stretching pulling force is set as 200KN; Draw speed is set as 5mm/ minute;
After installation, start drawing machine and start to stretch, slowly stretch to contrary both direction, until detected exemplar (1) ftractures under tension, off-test, takes off each parts, arranges drawing machine data;
By being detected the size that exemplar (1) fracture position bears pulling force to the analysis of data, judge the height of seam seam position and non-seam position intensity.
2. the detection method of magnesium alloy hollow extrusion Weld strength according to claim 1, described first core rod (2) and the symmetric shape of the second core rod (3) in triangle cylindricality, square, semicolumn, the shape of detected exemplar size can be spliced into, be dimensioned slightly smaller than detected exemplar, detected exemplar can be filled in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875404.XA CN105486580A (en) | 2015-12-03 | 2015-12-03 | Method for detecting extruding and welding strength of magnesium hollow section bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875404.XA CN105486580A (en) | 2015-12-03 | 2015-12-03 | Method for detecting extruding and welding strength of magnesium hollow section bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105486580A true CN105486580A (en) | 2016-04-13 |
Family
ID=55673706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510875404.XA Pending CN105486580A (en) | 2015-12-03 | 2015-12-03 | Method for detecting extruding and welding strength of magnesium hollow section bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105486580A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208085A (en) * | 2019-05-27 | 2019-09-06 | 中国飞机强度研究所 | A kind of metal material hole squeeze test device and test method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331369A (en) * | 2011-07-20 | 2012-01-25 | 辽宁忠旺集团有限公司 | Destructive test method for extrusion weld joints of aluminum alloy sections |
| CN102589979A (en) * | 2012-01-18 | 2012-07-18 | 清华大学 | Simulation experiment method for extrusion welding performance of aluminium alloy |
| US20130055824A1 (en) * | 2011-09-07 | 2013-03-07 | Michael Dean Langlais | Weld Strength Test |
| CN202869883U (en) * | 2012-09-24 | 2013-04-10 | 银锚铝业股份公司 | Tool for testing weld seam quality of aluminum alloy industrial sectional bar |
| CN203929506U (en) * | 2014-06-24 | 2014-11-05 | 亚太轻合金(南通)科技有限公司 | A kind of frock detecting for aluminium section bar mechanical property |
| US20140360247A1 (en) * | 2013-06-10 | 2014-12-11 | Wefa Singen Gmbh | Method for manufacturing an extrusion die |
-
2015
- 2015-12-03 CN CN201510875404.XA patent/CN105486580A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331369A (en) * | 2011-07-20 | 2012-01-25 | 辽宁忠旺集团有限公司 | Destructive test method for extrusion weld joints of aluminum alloy sections |
| US20130055824A1 (en) * | 2011-09-07 | 2013-03-07 | Michael Dean Langlais | Weld Strength Test |
| CN102589979A (en) * | 2012-01-18 | 2012-07-18 | 清华大学 | Simulation experiment method for extrusion welding performance of aluminium alloy |
| CN202869883U (en) * | 2012-09-24 | 2013-04-10 | 银锚铝业股份公司 | Tool for testing weld seam quality of aluminum alloy industrial sectional bar |
| US20140360247A1 (en) * | 2013-06-10 | 2014-12-11 | Wefa Singen Gmbh | Method for manufacturing an extrusion die |
| CN203929506U (en) * | 2014-06-24 | 2014-11-05 | 亚太轻合金(南通)科技有限公司 | A kind of frock detecting for aluminium section bar mechanical property |
Non-Patent Citations (4)
| Title |
|---|
| K. J. KIM ET AL.: "Investigation into the improvement of welding strength in three-dimensional extrusion of tubes using porthole dies", 《JOURNAL OF MATERIALS PROCESSING TECHNOLOGY》 * |
| L. DONATI ET AL.: "Characterization of seam weld quality in AA6082 extruded profiles", 《JOURNAL OF MATERIALS PROCESSING TECHNOLOGY》 * |
| 冯迪等: "铝合金空心型材挤压焊合问题的研究进展", 《材料导报A：综述篇》 * |
| 宋振雷等: "铝合金挤压型材试样加工工艺及疲劳性能研究", 《工程与试验》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208085A (en) * | 2019-05-27 | 2019-09-06 | 中国飞机强度研究所 | A kind of metal material hole squeeze test device and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105203394B (en) | Determine the device of plate stress-strain diagram | |
| CN102410957B (en) | Test sample and method for testing performance parameters of pipe under complex stress state | |
| US20150360281A1 (en) | Aluminum porthole extruded tubing with locating feature | |
| CN102353598A (en) | Composite strain path forming test device | |
| CN103962406B (en) | A kind of divergent die shaping pipe squeezes swollen assembling die | |
| CN103033421A (en) | Bulging experiment device for directly testing mechanical property of pipe | |
| CN105203453A (en) | Micro-punching-shear testing device and method for micro-area mechanical property of welding joint | |
| CN105486580A (en) | Method for detecting extruding and welding strength of magnesium hollow section bar | |
| CN107727505A (en) | A kind of plane strain extension (PSE) method | |
| CN110487640B (en) | Reducing expansion cone test device | |
| CN104502192A (en) | Strip-type tube test piece drawing device | |
| CN202238994U (en) | Rapid alignment detection device of extruding machine | |
| CN204843930U (en) | Simple and easy welded steel fabric resistance to shear anchor clamps | |
| CN105547826A (en) | Detection method of extruding and welding strength of magnesium alloy pipes | |
| CN106289977B (en) | Bolt concrete tensile test device and test method | |
| CN104458443A (en) | Interlaminar shear resistant strength testing method | |
| CN103746265B (en) | A kind of terminal inserting apparatus | |
| CN103528881B (en) | Method and device for quickly detecting bauschinger effect value of pipeline steel in steel plate production field | |
| CN209992157U (en) | Heat exchange tube expansion joint pull-off test tool | |
| Reggiani et al. | Comparison of experimental methods to evaluate seam welds quality in extruded profiles | |
| CN204855336U (en) | Test device is peeled off to PE electric smelting subassembly | |
| CN104297075A (en) | A metal wire torsion test method for a steel wire rope | |
| CN216410624U (en) | Novel process test tool | |
| HE et al. | Mechanical property and formability of AZ31B extruded tube at elevated temperature | |
| CN206689732U (en) | A kind of ring flange production system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |
|
| WD01 | Invention patent application deemed withdrawn after publication |