CN102501004A - Method for manufacturing frame component of magnesium alloy wheelchair - Google Patents
Method for manufacturing frame component of magnesium alloy wheelchair Download PDFInfo
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- CN102501004A CN102501004A CN2011103244894A CN201110324489A CN102501004A CN 102501004 A CN102501004 A CN 102501004A CN 2011103244894 A CN2011103244894 A CN 2011103244894A CN 201110324489 A CN201110324489 A CN 201110324489A CN 102501004 A CN102501004 A CN 102501004A
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Abstract
The invention discloses a method for manufacturing a frame component of a magnesium alloy wheelchair. The method comprises the following steps of: (1) cutting a lining pipe with diameter equal to the inner diameter of a pipe to be welded, and chamfering for 45-75 degrees; (2) heating the end needing welding of the pipe to be welded, and clamping in a clamp with an embedded lining pipe; (3) heating the lining pipe and aligning the chamfered end thereof with the pipe to be welded so that the lining pipe is embedded into the pipe to be welded and the outer ends of the two pipes are level; (4) milling arc mouths at the ends of the two pipes, wherein the radian of the arc mouth is the same as that of the outer diameter of the main pipe; and chamfering the arc milling end until the inner side of the lining pipe is exposed; and (5) adjusting current to 120A, and performing flat welding of the lining pipe and the main pipe; and adjusting the current to 150A and performing scale welding of the pipe to be welded and the main pipe. In the invention, the pipe to be welded is heated to expand, the lining pipe is pressed into the pipe to be welded, then the two pipes are subjected to chamfering and welding, and thus, the two pipes are organically combined, the strength is improved, the problem of easy cracking at the welding part is solved, and the magnesium alloy wheelchair can reach the national test standard.
Description
Technical field
The present invention relates to the preparation method of wheelchair frame, particularly relate to a kind of preparation method of magnesium alloy wheelchair frame member.
Background technology
At present, the main material of China's manufacturing rehabilitation wheelchair car has steel, aluminium alloy, titanium alloy, carbon fiber and magnesium alloy.The wheel Wheel-chair made from magnesium alloy is lighter than the wheelchair made from steel, aluminium alloy, titanium alloy, and identical with carbon fiber substantially, its cost is significantly less than carbon fiber and titanium alloy.But the technical problem that faces with magnesium alloy making wheelchair frame is that welding performance is unstable, and magnesium alloy plasticity is relatively poor; This is because the stress that the welding bead place is easy to generate is concentrated; As be mingled with, defectives such as pore, loose, undercut, these defectives are responsive especially to the relatively poor magnesium alloy of plasticity, under near the effect of the high temperature metal solution when welding of the magnesium alloy microscopic structure the welding bead variation taken place in addition; It not the tissue of extrudate; Its intensity has only the 60-70% of matrix, that is to say near intensity difference of the existence of matrix and welding bead, and position fatigue strength reduced near these factors all caused welding bead.General welding bead section thickness is thicker than other position, so, very easily before weld bond, produce fracture when doing fatigue vibration test and in the use, do not reach testing standard.How improving near the intensity of welding bead is problem anxious to be solved in the magnesium alloy wheel Wheel-chair manufacture process.
Usually people's ways of addressing this issue has two: the one, add a bushing pipe in the inboard part to be welded of welding bead.The 2nd, the wall thickness of increase section bar.Strengthened near the intensity of welding bead though increase wall thickness, do not had thoroughly to solve near the intensity difference of matrix and welding bead, finally still will rupture at the welding bead place; And increase wall thickness; Can strengthen the weight of wheel Wheel-chair, waste raw material, magnesium alloy wheel Wheel-chair also just loses light-weighted advantage.Internal lining pipe in the past all is cold fitting method; And cold cooperation is a matched in clearance; In the high-strength impact fatigue test,, fail to bring the effect that internal lining pipe is gained in strength fully into play, played negative interaction when fit clearance is excessive on the contrary for the separate type vibration; Stress is concentrated, and welding bead and bushing pipe junction be easy fracture more.
Summary of the invention
The object of the invention is intended to overcome above-mentioned shortcoming, and a kind of preparation method of magnesium alloy wheelchair frame member is provided, and has solved magnesium alloy wheelchair frame welding bead and the bushing pipe junction problem of fracture easily.
For achieving the above object, the present invention adopts following solution: a kind of preparation method of magnesium alloy wheelchair frame member, frame member comprise to be responsible for and the welded tube of treating that welds with it, and it is characterized in that: it comprises following processing step:
1, the isometrical internal lining pipe 40 mm ~ 50mm of intercepting and bore to be welded, chamfering 45 degree～75 degree;
2, will treat that welded tube need weld an end and put into heating box, when treating that the temp controlled meter reading reaches 240 ℃ ~ 260 ℃ it taken out, and put in the insert bushing pipe anchor clamps and clamp;
3, earlier internal lining pipe is heated to 80～100 ℃, its chamfering one end is aimed at treated welded tube fire end mouth again, step the hydraulic mandril switch then, internal lining pipe is headed into slowly treat that welded tube to two-tube outer end is concordant;
4, double pipe end is milled nock, radian is identical with person in charge's external diameter, carries out 45 degree～75 degree chamferings to milling the arc end, is as the criterion to expose the internal lining pipe inner edge;
5, the welded tube of treating that will be responsible for and embed internal lining pipe is put into welding positioner and is clamped, and earlier electric current is adjusted to 120A, and the internal lining pipe and the person in charge are run downhand welding; Again electric current is adjusted to 150A, treats the welded tube and the person in charge and carry out the fish scale weldering.
Compared with prior art, the present invention has following advantage:
1, the present invention heats it is expanded through treating welded tube, being pressed into and treating welded tube through calculating and measure the friction tight internal lining pipe of choosing of mistake, carries out two-tube chamfering welding then again.The Embedded internal lining pipe processing method of this heat seal can make the two-tube integral body that organically is combined into; Thoroughly changed cold in the past interior processing method of mending; The intensity of mending in improving reaches more than 15%; Broken through the technical bottleneck of weld easy fracture in the past, made the magnesium alloy wheelchair can reach national examination criteria.
2, strengthen the wall thickness that bushing pipe has been equivalent to thicken the pipe end place in the heat seal type, help welding, increased the intensity of weld bond.
3, strengthening bushing pipe in the heat seal type does not have stress to concentrate, and can before interior reinforcement bushing pipe, not rupture.
4, strengthening bushing pipe in the heat seal type can be responsible for the wall wall thickness by attenuate, alleviates vehicle frame weight, gives full play to the light weight advantage of magnesium alloy.
5, strengthen bushing pipe in the heat seal type and strengthened the rigidity of joint, do not have outside patch, elegant in appearance.
The specific embodiment
Below in conjunction with embodiment the present invention is made further detailed description.
The frame member of present embodiment comprise be responsible for with it vertical weld treat welded tube, its processing step is following:
1, the isometrical internal lining pipe 50mm of intercepting and bore to be welded, chamfering 45 degree;
2, will treat that welded tube need weld an end and put into heating box, when treating that the temp controlled meter reading reaches 240 ℃ it taken out, and put in the insert bushing pipe anchor clamps and clamp;
3, earlier internal lining pipe is heated to 100 ℃, its chamfering one end is aimed at treated welded tube fire end mouth again, step the hydraulic mandril switch then, internal lining pipe is headed into slowly treat that welded tube to two-tube outer end is concordant;
4, double pipe end is milled nock, radian is identical with person in charge's external diameter, carries out 45 degree chamferings to milling the arc end, is as the criterion to expose the internal lining pipe inner edge;
5, the welded tube of treating that will be responsible for and embed internal lining pipe is put into welding positioner and is clamped, and earlier electric current is adjusted to 120A, and the internal lining pipe and the person in charge are run downhand welding; Again electric current is adjusted to 150A, treats the welded tube and the person in charge and carry out the fish scale weldering.
Claims (1)
1. the preparation method of a magnesium alloy wheelchair frame member, frame member comprise the welded tube of being responsible for welding with it of treating, it is characterized in that: it comprises following processing step:
(1) the isometrical internal lining pipe 40 mm ~ 50mm of intercepting and bore to be welded, chamfering 45 degree～75 degree;
(2) will treat that welded tube need weld an end and put into heating box, when treating that the temp controlled meter reading reaches 240 ℃ ~ 260 ℃ it taken out, and put in the insert bushing pipe anchor clamps and clamp;
(3) earlier internal lining pipe is heated to 80～100 ℃, its chamfering one end is aimed at treated welded tube fire end mouth again, step the hydraulic mandril switch then, internal lining pipe is headed into slowly treat that welded tube to two-tube outer end is concordant;
(4) double pipe end is milled nock, radian is identical with person in charge's external diameter, carries out 45 degree～75 degree chamferings to milling the arc end, is as the criterion to expose the internal lining pipe inner edge;
(5) welded tube of treating that will be responsible for and embed internal lining pipe is put into welding positioner and is clamped, and earlier electric current is adjusted to 120A, and the internal lining pipe and the person in charge are run downhand welding; Again electric current is adjusted to 150A, treats the welded tube and the person in charge and carry out the fish scale weldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103244894A CN102501004A (en) | 2011-10-24 | 2011-10-24 | Method for manufacturing frame component of magnesium alloy wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103244894A CN102501004A (en) | 2011-10-24 | 2011-10-24 | Method for manufacturing frame component of magnesium alloy wheelchair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102501004A true CN102501004A (en) | 2012-06-20 |
Family
ID=46213169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103244894A Pending CN102501004A (en) | 2011-10-24 | 2011-10-24 | Method for manufacturing frame component of magnesium alloy wheelchair |
Country Status (1)
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| CN (1) | CN102501004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068337A (en) * | 2019-09-16 | 2020-12-11 | 中国科学院福建物质结构研究所 | Magneto-optical isolator core, manufacturing method thereof and magneto-optical isolator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201010002Y (en) * | 2006-11-24 | 2008-01-23 | 瑞礼运动器材(深圳)有限公司 | Novel bicycle frame |
| CN201208686Y (en) * | 2008-05-16 | 2009-03-18 | 中冶天工上海十三冶建设有限公司 | Top tool for aluminum-magnesium alloy pipeline contra aperture welding |
| CN101585131A (en) * | 2008-05-22 | 2009-11-25 | 于克儒 | Inside reinforcement processing method for welding bicycle |
| CN102172803A (en) * | 2011-03-25 | 2011-09-07 | 瑞安市乐勤航空部件有限公司 | Magnesium alloy pipe and method for increasing intensity around weldment bead of magnesium alloy pipe |
-
2011
- 2011-10-24 CN CN2011103244894A patent/CN102501004A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201010002Y (en) * | 2006-11-24 | 2008-01-23 | 瑞礼运动器材(深圳)有限公司 | Novel bicycle frame |
| CN201208686Y (en) * | 2008-05-16 | 2009-03-18 | 中冶天工上海十三冶建设有限公司 | Top tool for aluminum-magnesium alloy pipeline contra aperture welding |
| CN101585131A (en) * | 2008-05-22 | 2009-11-25 | 于克儒 | Inside reinforcement processing method for welding bicycle |
| CN102172803A (en) * | 2011-03-25 | 2011-09-07 | 瑞安市乐勤航空部件有限公司 | Magnesium alloy pipe and method for increasing intensity around weldment bead of magnesium alloy pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112068337A (en) * | 2019-09-16 | 2020-12-11 | 中国科学院福建物质结构研究所 | Magneto-optical isolator core, manufacturing method thereof and magneto-optical isolator |
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Application publication date: 20120620 |