CN109676018A - A kind of high-strength steel laser assisted incremental forming technique - Google Patents
A kind of high-strength steel laser assisted incremental forming technique Download PDFInfo
- Publication number
- CN109676018A CN109676018A CN201910021497.8A CN201910021497A CN109676018A CN 109676018 A CN109676018 A CN 109676018A CN 201910021497 A CN201910021497 A CN 201910021497A CN 109676018 A CN109676018 A CN 109676018A
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- China
- Prior art keywords
- laser
- strength steel
- processing
- heating
- deformation
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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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
-
- 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
- B21D37/16—Heating or cooling
Abstract
The invention belongs to materials processing technology fields, are related to a kind of laser-assisted incremental forming method of high-strength steel.The purpose of the present invention is the increment forming process of assisted high-strength is heated by laser, laser precisely heats high-strength steel plate along machining locus line, to reduce resistance of deformation of the high-strength steel in increment molded plastic deformation process, high-strength steel mouldability is improved, improves working efficiency.Implementation method specifically includes that design machining locus line, installs fixed high-strength steel plate, opens laser and heats to trajectory line starting point, laser is moved along trajectory line uniform speed slow after heating to a certain extent, processing pressure head is processed along trajectory line simultaneously, completion of processing, test and assessment part performance.High-strength steel laser assisted incremental forming method proposed by the present invention is the laser beam emitting device for increasing a set of process control on original increment molding equipment, by carrying out laser auxiliary heating to plate in increment molding process, improve the mouldability of high-strength steel, cracked in process or even fracture tendency is reduced, the efficiency of processing is improved.The present invention finally can effectively improve deformation difficulty in high-strength steel process, be easy the problem of cracking, to improve productivity for actual production process, reduction production cost provides a kind of reliable processing method.
Description
Technical field
The invention belongs to laser-assisted incremental forming techniques to pass through laser heating technique for high-strength steel difficulty problem on deformation
Its increment is assisted to form.
Background technique
Metal blank NC incremental forming technology is a kind of forming technology proposed the 1990s, its application is quickly former
" Layered manufacturing " is theoretical in type manufacturing technology, and the three-dimensional monolithic molding mode of complex parts is resolved into a series of two-dimentional levels
Part, point-by-point Plastic Forming, it does not need dedicated mold in formation, and production cost can be effectively reduced, and improves processed
The flexibility of journey.
But for high strength steel plate, since its intensity is significantly higher than traditional material, increment partial plastic forming needs very
High single-point forming force, current machining tool and equipment are difficult to meet processing request, and simultaneous processing tool wear is serious, easily
In occurring accident, therefore it is badly in need of exploring one kind effectively specifically for the accumulation forming technology and method of high-strength steel.
Laser heating is important heating means, has the good characteristics such as good directionality, energy height, energy-controllable, wide
It is general to be applied to the field of material processings such as laser cutting, laser welding, Surface heat-treatent.Laser processing technology is compared to other processing
Technology has the advantages that many incomparable: since it is contactless processing, to workpiece without directly impact, therefore without mechanically deform；
It is worn in laser processing procedure without " cutter ", acts on workpiece without " cutting force "；In laser processing procedure, laser beam energy density
Height, process velocity is fast, and is partial operation, does not have or influences minimum on non-laser irradiated site.Therefore, heat affected area
It is small, workpiece thermal deformation is small, following process is minimum；Due to laser beam be easy to be oriented to, focus, realize direction transformation, easily with numerical control
System cooperates, process to complex part therefore it is a kind of extremely flexible processing method；High production efficiency, processing quality
Reliable and stable, economic benefit and social benefit are good.
Therefore, it in order to reduce the resistance of deformation in the molding of high-strength steel increment, reduces and cracks in forming process and effectively control
Forming area processed, the present invention propose a kind of laser-assisted incremental forming technique-high-strength steel laser assisted for high strength steel plate
Increment molding pinpoints high-strength steel using the high concentration heat source of laser and heats, and processes plate in hot spot and increment molding
Stress point keeps synchronizing, and improves sheet deformation drape forming, and deformation can be controlled by the adjusting to laser intensity
The depth and the rate of heat addition of layer, to make deformation more uniformly reduce thermal stress, so that crackle and cracking in deformation be avoided to ask
Topic.
Summary of the invention
The object of the present invention is to provide a kind of laser-assisted high-strength increment forming methods, are pinpointed and are heated using laser
High-strength steel resistance of deformation is reduced, by controlling the depth and the rate of heat addition of deformation layer to the adjusting of laser intensity, to make to become
Shape is more uniform, reduces thermal stress, to avoid the crackle and problem of Cracking in deformation.
Traditional heating method heating efficiency is lower, and heating rate is slower, and can not flexible choice heating region.And laser
Heating intensity and high-efficient can accurately control heating rate by adjusting laser intensity, and can flexible choice heating region,
Since the molding of high-strength steel increment belongs to Point contact machining mode, it is not required to large area heating, therefore laser is a kind of highly desirable
Assist heating method.
To reach above-mentioned technical goal, the present invention is realized using following technical scheme:
(1) it is equipped with a set of laser transmitting set on the basis of original high-strength steel increment molding equipment, laser intensity is adjustable, swashs
Optical position is consistent by process control, heating path with sheet fabrication track.
(2) it opens laser to be allowed to heat high-strength steel plate machining path with certain speed, speed makes plate abundant enough
It is heated to predetermined temperature, is plastically deformed to be conducive to high-strength steel.
(3) at the same time, molding equipment processes plate point by point, and machining path and laser heating path keep one
It causes, guarantees first heat temperature raising, be allowed to deform later again, reduce resistance of deformation, until processing required shape to high-strength steel plate
With the part of size.
(4) sample is cooled down or is air-cooled to room temperature in certain medium by process finishing.
Compared with prior art, beneficial effects of the present invention are as follows:
1, ancillary technique is used as using laser heating, increases the deformability of high-strength steel, reduces the loss to equipment,
Cost has been saved, processing efficiency is improved.
2, the depth of heating speed and deformation layer can be controlled by control laser intensity and movement speed, to adjust
The heated and cooling velocity of plate makes its deformation more uniformly, reduces its tendency for generating fire check.
3, laser is flexibly controllable, can heat to region is arbitrarily designated, and can be subtracted to greatest extent by laser regulation
Small processing heat affected area reduces manufacturing deficiency and cracking.
4, laser is as a kind of clean energy resource, and pollution-free, heating efficiency is high.
Detailed description of the invention
Fig. 1 show laser-assisted incremental shaping schematic view, and laser light source transmitting laser heats plate, passes through journey
Sequence control moves heating path along machining locus line, and at the same time, processing pressure head carries out plate along machining locus line
Processing, finally processes the molded part of required shape and size.
Specific embodiment
It is illustrated for processing cell type part, the specific steps are as follows:
(1) machining locus is designed.The route of processing pressure head and laser heating is designed according to the shape and size of required part
Track makes pressure head and laser that high-strength steel plate be processed and be heated along trajectory line.
(2) it opens laser to be allowed to heat at plate geometric center, heating certain time softens high-strength steel plate to one
Determine degree and be conducive to plastic deformation, plate is evenly heated with certain speed uniform motion then along trajectory line.
(3) at the same time, processing pressure head is allowed to be plastically deformed to plate pressurization, and at the uniform velocity moves along machining locus line
Dynamic, process velocity is consistent with heating speed, to guarantee low resistance of deformation.
(4) turn off laser after completion of processing, lift pressure head, taken out after part is fully cooled, detection and evaluating parts shape
Whether shape and size reach expected requirement, such as not up to require, and adjust laser intensity, heating speed, ram pressures and add
The technological parameters such as work trajectory line repeat to test, until processing the part of required shape and size.
Claims (2)
1. a kind of high-strength steel laser assisted incremental forming technique is specifically completed according to the following steps:
(1) it designs machining locus: designing the route track of processing pressure head and laser heating according to the shape and size of required part,
Make pressure head and laser that high-strength steel plate be processed and be heated along trajectory line；
(2) it opens laser to be allowed to heat at plate geometric center, heating certain time softens high-strength steel plate to certain journey
Degree is conducive to plastic deformation, is evenly heated then along the movement of trajectory line uniform speed slow to plate；
(3) at the same time, processing pressure head is allowed to be plastically deformed to plate pressurization, and at the uniform velocity moves along machining locus line,
Process velocity is consistent with heating speed, to guarantee low resistance of deformation；
(4) turn off laser after completion of processing, lift pressure head, taken out after part is fully cooled, detection and evaluating parts shape and
Whether size reaches expected requirement, such as not up to requires, adjustment laser intensity, heating speed, ram pressures and processing rail
The technological parameters such as trace repeat to test, until processing the part of required shape and size.
2. a kind of high-strength steel laser assisted incremental forming technique according to claim 1, it is characterised in that: conventional increment at
A set of laser transmitting set is increased in type method, by reducing in high-strength steel machining deformation along the heating of track laser is set
Drag improves the mouldability of high-strength steel, improves production efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910021497.8A CN109676018A (en) | 2019-01-10 | 2019-01-10 | A kind of high-strength steel laser assisted incremental forming technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910021497.8A CN109676018A (en) | 2019-01-10 | 2019-01-10 | A kind of high-strength steel laser assisted incremental forming technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109676018A true CN109676018A (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910021497.8A Pending CN109676018A (en) | 2019-01-10 | 2019-01-10 | A kind of high-strength steel laser assisted incremental forming technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042618A (en) * | 2021-03-15 | 2021-06-29 | 武汉理工大学 | Incremental forming method for large-scale component |
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| CN101204756A (en) * | 2007-12-18 | 2008-06-25 | 中国石油大学(华东) | Heat conjunction metal board laser forming method |
| CN101332538A (en) * | 2008-07-30 | 2008-12-31 | 山东大学 | Sheet laser micro-drawing forming method and device with synchro heating |
| US20090158805A1 (en) * | 2005-04-22 | 2009-06-25 | Bart Callebaut | Asymmetric incremental sheet forming system |
| CN101947597A (en) * | 2010-07-26 | 2011-01-19 | 浙江工业大学 | Gradual die-less forming method |
| CN104646479A (en) * | 2015-02-02 | 2015-05-27 | 浙江理工大学 | Laser heating induced isostatic pressing loading type die-less forming method of plates |
| CN107962097A (en) * | 2017-12-01 | 2018-04-27 | 江苏理工学院 | A kind of heat auxiliary progressive molding machining tool based on laser |
| CN108907188A (en) * | 2018-07-20 | 2018-11-30 | 西安增材制造国家研究院有限公司 | A kind of temperature control equipment and its control method for increasing material manufacturing |
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2019
- 2019-01-10 CN CN201910021497.8A patent/CN109676018A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090158805A1 (en) * | 2005-04-22 | 2009-06-25 | Bart Callebaut | Asymmetric incremental sheet forming system |
| CN101204756A (en) * | 2007-12-18 | 2008-06-25 | 中国石油大学(华东) | Heat conjunction metal board laser forming method |
| CN101332538A (en) * | 2008-07-30 | 2008-12-31 | 山东大学 | Sheet laser micro-drawing forming method and device with synchro heating |
| CN101947597A (en) * | 2010-07-26 | 2011-01-19 | 浙江工业大学 | Gradual die-less forming method |
| CN104646479A (en) * | 2015-02-02 | 2015-05-27 | 浙江理工大学 | Laser heating induced isostatic pressing loading type die-less forming method of plates |
| CN107962097A (en) * | 2017-12-01 | 2018-04-27 | 江苏理工学院 | A kind of heat auxiliary progressive molding machining tool based on laser |
| CN108907188A (en) * | 2018-07-20 | 2018-11-30 | 西安增材制造国家研究院有限公司 | A kind of temperature control equipment and its control method for increasing material manufacturing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042618A (en) * | 2021-03-15 | 2021-06-29 | 武汉理工大学 | Incremental forming method for large-scale component |
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Application publication date: 20190426 |