CN105945147A - Laser composite texture thin-walled tube bending mold and composite texture forming method thereof - Google Patents
Laser composite texture thin-walled tube bending mold and composite texture forming method thereof Download PDFInfo
- Publication number
- CN105945147A CN105945147A CN201610297839.5A CN201610297839A CN105945147A CN 105945147 A CN105945147 A CN 105945147A CN 201610297839 A CN201610297839 A CN 201610297839A CN 105945147 A CN105945147 A CN 105945147A
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- Prior art keywords
- tube bending
- pattern
- laser
- boss
- pit
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
Abstract
The invention discloses a laser composite texture thin-walled tube bending mold and a composite texture forming method thereof, and belongs to the field of machine manufacturing. The mold comprises a tube bending mold main body corresponding to a bent part of a tube, a clamping block used for being clamped on a vertical section of the tube and a pressing block used for being pressed on a horizontal section of the tube. The mold further comprises a wrinkle-proof plate mounted on one side of the tube bending mold main body. The clamping block, the pressing block, the wrinkle-proof plate and the arc-shaped surface of the tube bending mold main body form the clamping face of the tube bending mold. The clamping face of the tube bending mold is provided with composite shapes. By adopting the structure and the method, the strain distribution, variation of the wall thickness and deformation of cross sections of formed parts are more uniform; side tube walls are prevented from instability wrinkling due to large curvatures and too small thickness and drawing breakage due to small curvatures; and springback of the formed parts is alleviated, the tube bending precision is improved, and the forming quality is improved. Finally, bending forming with the stable precision is achieved.
Description
Technical field
The present invention relates to a kind of bend-pipe forming die, specifically a kind of laser is combined texture thin-walled tube bending mould and compound texture forming method thereof, belongs to mechanical manufacturing field.
Background technology
Theoretical and engineering research shows: the friction in metal forming can not minimizing simply, component shaping quality is had opposite impacts on by mould with the frictional behavior at absorption surface interface, thus at the different contact interfaces the most rational friction conditions of existence.
Prior art such as thermal spraying, plasma chemical heat treatment, vapour deposition, TD process, ion implanting, shot blasting on surface etc., change mould surface layer composition, geometrical morphology, tissue or at surface deposited plating layer, improve the hardness of mould, wearability, fatigue strength, thermostability, corrosion resistance, seizure resistance.But above-mentioned technology has defect more or less at range of application, process controllability, repeatability, working (machining) efficiency and the aspect such as cost, bond strength.
Such as: Chinese patent 200410039671.5 discloses a kind of die surface intensifying process, the method is first mould finished goods to be carried out stress relieving, grit blasting operation program is carried out again with pottery sand, it is that die surface its compressive stress of harder and effective increase chaps and other defect to reduce, and and then the fatigue resistance of increase mould.But the die surface that the method obtains, roughness skewness, controllability is not enough.
For another example: Chinese patent 200410010847.4 discloses a kind of at die surface laser quenching hardening process.The method only carries out surface modification treatment to workpiece, is not directed to surface of the work is carried out reshaping process.
In actual production, experienced mould work usually has a mind to rougher by drawing punch, and die working surface is the most smooth.Expect to utilize coarse convex mould surface and material to rub, make maximum drawing force occur in above critical section, increase the drawing ability of material.But coarse surface is prone to wear out, the effect above is difficult to persistently.The molding surface utilizing low roughness reduces harmful friction, but smooth surface is because being in boundary lubrication condition without trapped fuel region, it is impossible to forms mixed lubrication or fluid lubrication, easily produces adhesive wear, easily abrade, and die life reduces.On the other hand, said method is random, uncontrollable to the change of surface roughness, it is difficult to ensure surface uniformity for the treatment of, so that said method rests on the experience stage all the time.
Summary of the invention
The technical problem to be solved in the present invention is to provide one can improve material flowing and Stress distribution, thus the laser obtaining precise and stable bending forming is combined texture thin-walled tube bending mould and compound texture forming method thereof.
A kind of laser is combined texture thin-walled tube bending mould, including the tube bending die main body corresponding with the sweep of tubing, for being clamped in the fixture block of the vertical section of tubing and for being pressed on the briquetting of tubing horizontal segment, also include the Anti-wrinkling board being arranged on tube bending die body side, the arcwall face of fixture block, briquetting, Anti-wrinkling board and tube bending die main body forms the clamping face of tube bending die, and the clamping face of described tube bending die is provided with compound pattern.
Described compound pattern includes boss pattern and pit pattern, described boss pattern and pit pattern all array distribution on the clamping face of tube bending die, thus form boss texture area and pit texture area at the local location of the clamping surface of tube bending die.
Described boss texture area and pit texture area are positioned at the clamping face of tube bending die and the contact position of tubing.
Described boss texture area is positioned on the arcwall face of fixture block, briquetting and tube bending die；Described pit texture area is positioned in the groove cambered surface of Anti-wrinkling board.
The part of described boss texture area protrusions is 5% ~ 50% with the occupation rate of boss texture area surface area, and the part of described pit texture area pits is 5% ~ 50% with the occupation rate of pit texture area surface area.
The height of described boss pattern is 1 ~ 20 micron, a diameter of 20 ~ 500 microns；The degree of depth of described pit pattern is 2 ~ 25 microns, a diameter of 10 ~ 100 microns.
The compound texture forming method of a kind of mould for bending thin-wall pipe, comprises the following steps:
(1) clamping face at tube bending die processes each compound pattern being respectively less than 1 millimeter to size, and described compound pattern includes the boss pattern (7) for being stamped in tubular object extruding face and pit pattern (8)；
(2) in thin-wall pipes 1 bending forming process, the partially or fully impressing on surface boss pattern (7) of tube bending die enters tubing (1) surface；Pit pattern (8) stores lubricating fluid；
(3) in the tube bending forming course of processing, height reduction 40-60% when described boss pattern, when the pit pattern degree of depth reduces 50%-80%, the clamping face of tube bending die is polishing to Ra0.1-0.3 μm, and re-works boss pattern and pit pattern thereon.
During described tube bending forming, the partially or fully impressing of the boss pattern (7) of tube bending die clamping face enters the finished surface of tubing.
Described boss pattern and pit pattern are obtained by high energy laser beam processing；The laser parameter producing boss pattern is: power density 104—107W/cm2, defocusing amount ± 2mm, pulse width 0.01 ~ 500ms；The laser parameter producing pit pattern is power density 106~108W/cm2, pulse width 0.01ns ~ 50 μ s, pulse frequency 1 ~ 50kHz, pulse number of repetition 1 ~ 7 time.
The laser instrument of described generation boss pattern is CO2Laser instrument, lamp pumping YAG laser, diode pumped YAG lasers or optical fiber laser, the laser instrument producing pit pattern is diode pumping YAG solid state laser or optical fiber laser.
After using above-mentioned structures and methods, micro-geometrical structure in bend-pipe forming die surface configuration, optimize the frictional behavior between materials in the tube and bend pipe mould contact interface, achieve the active optimization design to contact interface friction characteristics, thin-winding pipe die surface is carried out reshaping modification, accurately control the elastic-plastic deformation between mould regional area and thin-wall pipes and friction, and then improving material mobility status in forming process so that drip molding stress distribution, wall thickness change and cross-sectional deformation are evenly；Avoiding deep camber side pipe wall Instability wrinkling, little curvature side pipe wall thickness spends thin, drawing crack；Alleviating drip molding resilience, improve bend pipe precision, forming quality is improved；The bending forming that final acquisition is precise and stable, than former bend-pipe forming die, the present invention reduces maximum reduction about 6%, reduces cross section distortion rate about 10%.
Accompanying drawing explanation
Fig. 1 is thin-wall pipes bending forming schematic diagram in the present invention；
Fig. 2 is thin-wall pipes curved surface topographic profile schematic diagram in the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and detailed description of the invention, the laser of the present invention is combined texture thin-walled tube bending mould and compound texture forming method is described in further detail.
As shown in the figure, the laser of the present invention is combined texture thin-walled tube bending mould, including the tube bending die main body 2 corresponding with the sweep of tubing 1, for being clamped in the fixture block 3 of the vertical section of tubing 1 and for being pressed on the briquetting 5 of tubing 1 horizontal segment, also include the Anti-wrinkling board being arranged on tube bending die body side, fixture block 3, briquetting 5, the arcwall face of Anti-wrinkling board and tube bending die main body forms the clamping face of tube bending die, compound pattern it is provided with on the clamping face of tube bending die, described compound pattern includes boss pattern 7 and pit pattern 8, boss pattern 7 and pit pattern 8 all array distribution on the clamping face of tube bending die, thus form boss texture area and pit texture area at the local location of the clamping surface of tube bending die；Described boss texture area and pit texture area are positioned at the clamping face of tube bending die and the contact position of tubing, specifically boss texture area and are positioned on the arcwall face 4 of fixture block 3, briquetting 5 and tube bending die；Pit texture area is positioned in the groove cambered surface 6 of Anti-wrinkling board, wherein, the part of boss texture area protrusions is 5% ~ 50% with the occupation rate of boss texture area surface area, the part of pit texture area pits is 5% ~ 50% with the occupation rate of pit texture area surface area, the height of boss pattern 7 is 1 ~ 20 micron, a diameter of 20 ~ 500 microns；The degree of depth of pit pattern 8 is 2 ~ 25 microns, a diameter of 10 ~ 100 microns.
The compound texture forming method of a kind of mould for bending thin-wall pipe, comprises the following steps:
(1) clamping face at tube bending die processes each compound pattern being respectively less than 1 millimeter to size (diameter, the degree of depth and height), and compound pattern includes the boss pattern 7 for being stamped in tubular object extruding face and pit pattern 8；
(2) in thin-wall pipes 1 bending forming process, the partially or fully impressing of the surface boss pattern 7 of tube bending die enters thin-wall pipes 1 surface, improves the trackability of mould and thin-wall pipes 1, it is to avoid relatively slide；Pit pattern 8 stores lubricating fluid and reduces the contact area of mould and thin-wall pipes, it is to avoid thin-wall pipes 1 blocks；
(3) in the tube bending forming course of processing, height reduction 40-60% when boss pattern 7, when pit pattern 8 degree of depth reduces 50%-80%, the clamping face of tube bending die is polishing to Ra0.1-0.3 μm, and re-works boss pattern 7 and pit pattern 8 thereon.
During described tube bending forming, the partially or fully impressing of the boss pattern 7 of tube bending die clamping face enters the finished surface of tubing 1.
Wherein, described boss pattern 7 and pit pattern 8 are obtained by high energy laser beam processing；The laser parameter producing boss pattern 7 is: power density 104—107W/cm2, defocusing amount ± 2mm, pulse width 0.01 ~ 500ms；The laser parameter producing pit pattern 8 is power density 106~108W/cm2, pulse width 0.01ns ~ 50 μ s, pulse frequency 1 ~ 50kHz, pulse number of repetition 1 ~ 7 time；The laser instrument producing boss pattern 7 is CO2Laser instrument, lamp pumping YAG laser, diode pumped YAG lasers or optical fiber laser, the laser instrument producing pit pattern 8 is diode pumping YAG solid state laser or optical fiber laser.
Claims (10)
1. a laser is combined texture thin-walled tube bending mould, it is characterised in that: include and tubing
(1) the tube bending die main body (2) that sweep is corresponding, is used for being clamped in tubing (1)
The vertically fixture block (3) of section and be used for being pressed on the briquetting (5) of tubing (1) horizontal segment, also
Including being arranged on the Anti-wrinkling board of tube bending die body side, described fixture block (3), briquetting (5),
The arcwall face of Anti-wrinkling board and tube bending die main body forms the clamping face of tube bending die,
Compound pattern it is provided with on the clamping face of described tube bending die.
2. it is combined texture thin-walled tube bending mould, its feature according to the laser described in claim 1
It is: described compound pattern includes boss pattern (7) and pit pattern (8), described boss shape
Looks (7) and pit pattern (8) all array distribution on the clamping face of tube bending die, from
And form boss texture area and pit at the local location of the clamping surface of tube bending die and knit
Structure region.
3. it is combined texture thin-walled tube bending mould, its feature according to the laser described in claim 2
It is: described boss texture area and pit texture area are positioned at the clamping face of tube bending die
Contact position with tubing.
4. it is combined texture thin-walled tube bending mould, its feature according to the laser described in claim 3
It is: described boss texture area is positioned at fixture block (3), briquetting (5) and tube bending die
On arcwall face (4)；Described pit texture area is positioned in the groove cambered surface (6) of Anti-wrinkling board.
5. it is combined texture thin-walled tube bending mould, its feature according to the laser described in claim 4
It is: the part of described boss texture area protrusions is occupied with boss texture area surface area
Rate is 5%～50%, the part of described pit texture area pits and pit texture area surface area
Occupation rate be 5%～50%.
6. it is combined texture thin-walled tube bending mould, its feature according to the laser described in claim 5
It is: the height of described boss pattern (7) is 1～20 micron, a diameter of 20～500 microns；
The degree of depth of described pit pattern (8) is 2～25 microns, a diameter of 10～100 microns.
7. the compound texture forming method of a mould for bending thin-wall pipe, it is characterised in that: bag
Include following steps:
(1) clamping face at tube bending die processes and each is respectively less than 1 millimeter answer to size
Close pattern, described compound pattern include the boss pattern (7) for being stamped in tubular object extruding face and
Pit pattern (8)；
(2) in thin-wall pipes 1 bending forming process, surface boss pattern (7) of tube bending die
Partially or fully impressing enter tubing (1) surface；Pit pattern (8) stores lubricating fluid；
(3) in the tube bending forming course of processing, when the height of described boss pattern (7)
Reduce 40-60%, when pit pattern (8) degree of depth reduces 50%-80%, by tube bending die
Clamping face is polishing to Ra0.1-0.3 μm, and re-works boss pattern (7) and pit thereon
Pattern (8).
8. according to the compound texture forming method of the thin-walled tube bending mould described in claim 7,
It is characterized in that: during described tube bending forming, the boss of tube bending die clamping face
The partially or fully impressing of pattern (7) enters the finished surface of tubing (1).
9. according to the compound texture forming method of the thin-walled tube bending mould described in claim 8,
It is characterized in that: described boss pattern (7) and pit pattern (8) are processed by high energy laser beam
Obtain；The laser parameter producing boss pattern (7) is: power density 104—107W/cm2, from
Burnt amount ± 2mm, pulse width 0.01～500ms；The laser parameter producing pit pattern (8) is
Power density 106～108W/cm2, pulse width 0.01ns～50 μ s, pulse frequency 1～50kHz,
Pulse number of repetition 1～7 times.
10. according to the compound texture forming method of the thin-walled tube bending mould described in claim 1,
It is characterized in that: the laser instrument of described generation boss pattern (7) is CO2Laser instrument, lamp pumping
YAG laser, diode pumped YAG lasers or optical fiber laser, produce pit pattern (8)
Laser instrument be diode pumping YAG solid state laser or optical fiber laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610297839.5A CN105945147B (en) | 2016-05-06 | 2016-05-06 | A kind of compound texture thin-walled tube bending mold of laser and its compound texture forming method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610297839.5A CN105945147B (en) | 2016-05-06 | 2016-05-06 | A kind of compound texture thin-walled tube bending mold of laser and its compound texture forming method |
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| Publication Number | Publication Date |
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| CN105945147A true CN105945147A (en) | 2016-09-21 |
| CN105945147B CN105945147B (en) | 2019-07-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513510A (en) * | 2016-11-25 | 2017-03-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Small radius forming tool for large-diameter guide tube |
| CN107413949A (en) * | 2017-03-24 | 2017-12-01 | 江苏航空职业技术学院 | A kind of compound texture roll shaping dies and its compound texture manufacturing process |
| WO2020010769A1 (en) * | 2018-07-10 | 2020-01-16 | 烽火通信科技股份有限公司 | Apparatus and method for molding eccentric spiral tail fiber |
| CN111993076A (en) * | 2020-08-27 | 2020-11-27 | 吉林大学 | Be used for bionical tail pipe integration processing equipment of tractor |
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| CN101143377A (en) * | 2007-10-26 | 2008-03-19 | 江苏大学 | Laser roughening metal plastic forming mould and its preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106513510A (en) * | 2016-11-25 | 2017-03-22 | 沈阳黎明航空发动机(集团)有限责任公司 | Small radius forming tool for large-diameter guide tube |
| CN107413949A (en) * | 2017-03-24 | 2017-12-01 | 江苏航空职业技术学院 | A kind of compound texture roll shaping dies and its compound texture manufacturing process |
| WO2020010769A1 (en) * | 2018-07-10 | 2020-01-16 | 烽火通信科技股份有限公司 | Apparatus and method for molding eccentric spiral tail fiber |
| CN111993076A (en) * | 2020-08-27 | 2020-11-27 | 吉林大学 | Be used for bionical tail pipe integration processing equipment of tractor |
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| CN105945147B (en) | 2019-07-26 |
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