CN103100711A - Method of direct and rapid machining of rotational molding by lasher - Google Patents
Method of direct and rapid machining of rotational molding by lasher Download PDFInfo
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- CN103100711A CN103100711A CN2013100240265A CN201310024026A CN103100711A CN 103100711 A CN103100711 A CN 103100711A CN 2013100240265 A CN2013100240265 A CN 2013100240265A CN 201310024026 A CN201310024026 A CN 201310024026A CN 103100711 A CN103100711 A CN 103100711A
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Abstract
The invention provides a method of direct and rapid machining of rotational molding by lasher and belongs to the field of operation technique. The method of direct and rapid machining of rotational molding by laser in the prior art comprises the steps of A, mold designing, B, module processing, namely input of the data of a module after the module being sliced to a lens rapid make-up machine and technological parameter setting to the lens rapid make-up machine, operation of the lens rapid make-up machine till accomplishment of a module corresponding to input data, C, repetition of the step B till all the modules are accomplished, D, polishing treatment, namely polishing treatment of the molding surface of each module, and E, assembly, namely the assembly of each module according to designed mould assembly drawing. The method of direct and rapid machining of rotational molding by laser mainly comprises the steps of data establishment, module process, polishing and assembly, therefore the few processing steps are needed, and each process is easy to carry out, and thus the method for direct and rapid machining of rotational molding by laser has the advantage of simple forming process.
Description
Technical field
The invention belongs to the operation technique field, relate to a kind of mould manufacturing method, particularly a kind of laser is directly made the method for Plastic Rolling Molds fast.
Background technology
Rotation molding is wherein a kind of as plastic product moulding technology, has at home and abroad obtained in recent years developing rapidly, and rotational moulding, injection moulding, extrusion molding have been listed as three large pillars of plastic product moulding technology.But the relative injection mold of Plastic Rolling Molds forming technique, extruded mould but lag far behind, and are difficult to satisfy the speed that plastic products update.
Plastic Rolling Molds mainly is divided into steel mould and aluminum dipping form.The average thickness of steel mould is 2.5mm～3mm, is difficult to adopt conventional CNC machine-shaping, can only adopt manual operations to make and form, and labour intensity is large, and dimensional accuracy is low, and the production cycle is long.Aluminum dipping form comprises Cast Aluminum Dies and wrought aluminium mould; Cast Aluminum Dies is subjected to the restriction of Casting Technology, is difficult to satisfy for the high product of appearance requirement; Wrought aluminium mould dimensional accuracy is high, and surface quality is good, but cost is expensive, and the process-cycle is long, is not suitable for doing super-huge complex-curved Plastic Rolling Molds.In a word, Plastic Rolling Molds manufactures in order to restrict the bottleneck of rotational moulding Industry Quick Development.
At present, the metal die RP technique has been carried out research widely both at home and abroad, as the quick manufacturing process of rotational moulding machine die [application number: 201010224469.5 of Chinese patent literature record; Notification number: CN101920440B], a kind of method [application number: 201210050022.X of making rotational-moulding mold; Publication number: CN102581992A].Also have apart from the above electric arc spraying Rapid tooling, Selective Laser Sintering etc.The electric arc spraying Rapid tooling is to utilize arc pistol that the short circuit before spray gun of two molding special-purpose metal silks is formed electric arc, wire through after arc-melting under compressed-air actuated effect, motlten metal is atomized and be ejected into the apperance surface to certain thickness, thereby forming sprayed metal coating is the housing of mold cavity, facts have proved, the Plastic Rolling Molds density of producing in this way is relatively poor, mould rigid, undercapacity, mould is out of shape larger in forming process, is difficult to the defectives such as assembling after shaping is completed.Method [the application number: 200610029765.3 of a kind of precinct laser sintering fast manufacture metal die of the pertinent literature of Selective Laser Sintering such as Chinese patent literature record; Notification number CN100446897C], the problem such as the method mfg. moulding die has the forming technology complexity, and the mould density is not high, and mould contraction distortion in last handling process is larger.
Summary of the invention
The objective of the invention is to propose a kind of laser and directly make fast the method for Plastic Rolling Molds, the present invention will solve the problem of forming technology complexity.
Purpose of the present invention can realize by following technical proposal: a kind of laser is directly made the method for Plastic Rolling Molds fast, it is characterized in that, this method comprises the following steps:
A, Design of Dies utilize Three-dimensional CAD Software to design the modules of Plastic Rolling Molds according to target product; And all module is carried out slicing treatment;
B, processing module are inputted the data after a module slicing treatment LENS rapidform machine and the LENS rapidform machine are carried out processing parameter setting; Operation LENS rapidform machine is until machine the module corresponding with importing data;
C, repeating step B are until complete all module makings;
D, polishing are carried out polishing to the molded surface of modules;
E, assembling are assembled modules by the assembly drawing of die that designs.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, the Three-dimensional CAD Software in described steps A was UG, SolidWorks or CATIA.
In above-mentioned laser was directly fast made the method for Plastic Rolling Molds, the slicing treatment in described steps A was that the module with Plastic Rolling Molds is cut into the virtual thin slice that every thickness is 0.08mm～0.18mm.Above-mentioned thickness is determined flexibly according to factors such as module material and LENS rapidform machine working abilities.
In above-mentioned laser is directly made the method for Plastic Rolling Molds fast, be converted to stl file before the data of the input LENS rapidform machine in described step B.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, the processing parameter setting in described step B was one or more in laser power, laser facula sweep speed, metal powder feed amount and the every layer thickness of cladding layer.Generally metal being melted all needs powerful laser instrument, and the sweep speed of laser facula has influence on process time, scans faster, efficient is higher, but the laser power that needs is just larger, and the metal powder feed amount is suitable, too many melting is insufficient, and mould is organized unlikely close, affects intensity, cladding layer thickness is thinner, and molding cycle is longer, but dimensional accuracy is high, surface roughness is good, otherwise dimensional accuracy is relatively low, and surface roughness is large, follow-up polishing trouble.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, described laser power was 800W～1600W.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, described laser facula sweep speed was 0.2m/min～0.35m/min.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, described metal powder feed amount was 5g/min～20g/min.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, the every layer thickness of described cladding layer was identical with virtual sheet thickness.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, adding the granularity of the metal dust in the LENS rapidform machine in described step B was 40～100 μ m.
In above-mentioned laser was directly made the method for Plastic Rolling Molds fast, in described step B, LENS rapidform machine processing module process was all carried out under inert gas shielding.
Compared with prior art, the method that this laser is directly made Plastic Rolling Molds fast mainly comprises data creating, processing modules, polishing and assembling, so processing step is few and each technique is easily implemented, so have the simple advantage of forming technology.This method is compared with the method for precinct laser sintering fast manufacture metal die does not mainly have roasting and metal infiltration operation, has stopped thus the problems such as mould contraction distortion in last handling process is larger fully.This method also can be used for the quick reparation on Plastic Rolling Molds surface.
This method especially is fit to be applied to single-piece, the manufacturing of small lot Quick-forming of Plastic Rolling Molds, has promoted the development of rotational moulding industry.
Utilize this method production Plastic Rolling Molds, owing to adopting laser fast shaping technique to make module, therefore have advantages of with short production cycle, forming accuracy is high.Can adopt the mechanical connections such as welding or bolt connection between modules, therefore have advantages of that intensity is high.Also have simultaneously stock utilization high, cost is low, and die manufacturing cycle is short, and the mould density is high, the dimensional accuracy advantages of higher.
Description of drawings
Fig. 1 is the stereochemical structure signal of plastics car shell rotational moulding steel plate mould in the present invention.
Fig. 2 is the stereochemical structure of module signal in plastics car shell rotational moulding steel plate mould in the present invention.
Fig. 3 is the stereochemical structure signal of the square water tank aluminum alloy of plastics Plastic Rolling Molds in the present invention.
Fig. 4 is the stereochemical structure of module signal in the square water tank aluminum alloy of plastics Plastic Rolling Molds in the present invention.
The specific embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
Embodiment one
This example is the method for making plastics car shell rotational moulding steel plate mould.
The method that this laser is directly made Plastic Rolling Molds fast is comprised of data creating, processing modules, polishing and installation step.
Specifically, data creating is to utilize the modules of UG, SolidWorks or CATIA Three-dimensional CAD Software design Plastic Rolling Molds according to target product (plastics car shell); As shown in Figure 2.Then all module is carried out slicing treatment; Slicing treatment is that the module with Plastic Rolling Molds is cut into the virtual thin slice that every thickness is 0.08mm～0.18mm.
Utilize Three-dimensional CAD Software also can be welded to connect being defined as between correlation module and/or the mechanical connection such as bolt connection is assembled into Plastic Rolling Molds (as shown in Figure 1).
The processing modules comprises processing module and processes other modules by above-mentioned operation.Processing module is with the input LENS rapidform machine of the data after a module slicing treatment and the LENS rapidform machine is carried out processing parameter setting.Processing parameter setting is one or more in laser power, laser facula sweep speed, metal powder feed amount and the every layer thickness of cladding layer.Laser power is 800W～1600W; The laser facula sweep speed is 0.2m/min～0.35m/min; The metal powder feed amount is 5g/min～20g/min; Above-mentioned data based actual conditions can make up neatly.The every layer thickness of cladding layer is preferably identical with virtual sheet thickness.
Operation LENS rapidform machine is until machine the module corresponding with importing data.Adding the granularity of the metal dust in the LENS rapidform machine is 40～100 μ m.Because the target mould adopts steel plate, the material of the metal dust that therefore adds is corresponding with steel plate materials.
For the data that make making can be applicable to the LENS rapidform machine, all need to be converted to stl file before the data with input LENS rapidform machine.
Successively carry out the reaction such as metal generation oxidation in laser melting coating and thermal sintering process for fear of metal dust, LENS rapidform machine processing module process is all carried out under inert gas shielding, as argon gas, helium, argon-helium gas mixture body.
Processing other modules by above-mentioned operation is that the input of the data after next module slicing treatment LENS rapidform machine is replaced corresponding step in processing module.
Polishing is in order to improve the fineness of molded surface, namely the molded surface of modules to be carried out polishing.
Assembling is that modules is assembled by Plastic Rolling Molds assembling drawing.
More particularly, adopt industrial crossing current CO in the method for manufacturing plastics car shell rotational moulding steel plate mould
2Laser instrument is as the energy, and wavelength is 10.6, and metal dust adopts iron powder; The laser facula sweep speed is 0.3m/min, and the metal powder feed amount is 18g/min, and the every layer thickness of cladding layer is 0.15mm, and laser instrument successively carries out laser melting coating and thermal sintering module to the metal dust of forming machine dust feeder ejection.
By matched moulds and die trial production, the sample of producing is in physical dimension and satisfy in appearance real requirement fully.
Embodiment two
The present embodiment place different from embodiment one be, this example is the method for making cubic water tank rotational moulding aluminum alloy mould.Metal dust in this method is Al alloy powder, the laser facula sweep speed is 0.25m/min, powder sending quantity is 15g/min, every layer of cladding layer thickness is 0.1mm, and laser instrument successively carries out laser melting coating and thermal sintering module (as shown in Figure 4) to the metal dust of forming machine dust feeder ejection.Carry out practical set by cubic water tank rotational moulding aluminum alloy mould again and obtain cubic water tank rotational moulding aluminum alloy mould (as shown in Figure 3).
Claims (10)
1. laser is directly made the method for Plastic Rolling Molds fast, it is characterized in that, this method comprises the following steps:
A, Design of Dies utilize Three-dimensional CAD Software to design the modules of Plastic Rolling Molds according to target product; And all module is carried out slicing treatment;
B, processing module are inputted the data after a module slicing treatment LENS rapidform machine and the LENS rapidform machine are carried out processing parameter setting; Operation LENS rapidform machine is until machine the module corresponding with importing data;
C, repeating step B are until complete all module makings;
D, polishing are carried out polishing to the molded surface of modules;
E, assembling are assembled modules by the assembly drawing of die that designs.
2. laser according to claim 1 is directly fast made the method for Plastic Rolling Molds, it is characterized in that, the slicing treatment in described steps A is that the module with Plastic Rolling Molds is cut into the virtual thin slice that every thickness is 0.08mm～0.18mm.
3. laser according to claim 1 is directly made the method for Plastic Rolling Molds fast, it is characterized in that, is converted to stl file before the data of the input LENS rapidform machine in described step B.
4. according to claim 2 or 3 described laser are directly made the method for Plastic Rolling Molds fast, it is characterized in that, the processing parameter setting in described step B is one or more in laser power, laser facula sweep speed, metal powder feed amount and the every layer thickness of cladding layer.
5. laser according to claim 4 is directly made the method for Plastic Rolling Molds fast, it is characterized in that, described laser power is 800W～1600W.
6. laser according to claim 4 is directly made the method for Plastic Rolling Molds fast, it is characterized in that, described laser facula sweep speed is 0.2m/min～0.35m/min.
7. laser according to claim 4 is directly made the method for Plastic Rolling Molds fast, it is characterized in that, described metal powder feed amount is 5g/min～20g/min.
8. laser according to claim 4 is directly made the method for Plastic Rolling Molds fast, it is characterized in that, the every layer thickness of described cladding layer is identical with virtual sheet thickness.
9. according to claim 1 and 2 or 3 described laser are directly made the method for Plastic Rolling Molds fast, it is characterized in that, adding the granularity of the metal dust in the LENS rapidform machine in described step B is 40～100 μ m.
10. according to claim 1 and 2 or 3 described laser are directly made the method for Plastic Rolling Molds fast, it is characterized in that, in described step B, LENS rapidform machine processing module process is all carried out under inert gas shielding.
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| CN2013100240265A CN103100711A (en) | 2013-01-11 | 2013-01-11 | Method of direct and rapid machining of rotational molding by lasher |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109128165A (en) * | 2018-09-04 | 2019-01-04 | 华中科技大学 | A kind of mold fast processing method based on 3D printing mold core |
Citations (6)
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| JPH05131504A (en) * | 1991-11-08 | 1993-05-28 | Takeo Nakagawa | Manufacture of injection molding tool using photosetting resin |
| CN1970202A (en) * | 2006-12-08 | 2007-05-30 | 华中科技大学 | Method for selective laser sintering for quick and direct production of injection die |
| CN101185970A (en) * | 2007-12-12 | 2008-05-28 | 沈阳航空工业学院 | Composite fast molding method based on laser deposition molding and reducing type molding |
| CN101537684A (en) * | 2008-12-31 | 2009-09-23 | 黄吉力 | Polyurethane foam forming mould and manufacturing method of mould cavities |
| CN102029715A (en) * | 2010-10-25 | 2011-04-27 | 江苏文光车辆附件有限公司 | SLA (stereo lithography) technology of light curing stereo homocentric sphere |
| CN102327648A (en) * | 2011-10-15 | 2012-01-25 | 西安交通大学 | Porous magnesium alloy/biological ceramic bionic composite support and quick forming method thereof |
-
2013
- 2013-01-11 CN CN2013100240265A patent/CN103100711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05131504A (en) * | 1991-11-08 | 1993-05-28 | Takeo Nakagawa | Manufacture of injection molding tool using photosetting resin |
| CN1970202A (en) * | 2006-12-08 | 2007-05-30 | 华中科技大学 | Method for selective laser sintering for quick and direct production of injection die |
| CN101185970A (en) * | 2007-12-12 | 2008-05-28 | 沈阳航空工业学院 | Composite fast molding method based on laser deposition molding and reducing type molding |
| CN101537684A (en) * | 2008-12-31 | 2009-09-23 | 黄吉力 | Polyurethane foam forming mould and manufacturing method of mould cavities |
| CN102029715A (en) * | 2010-10-25 | 2011-04-27 | 江苏文光车辆附件有限公司 | SLA (stereo lithography) technology of light curing stereo homocentric sphere |
| CN102327648A (en) * | 2011-10-15 | 2012-01-25 | 西安交通大学 | Porous magnesium alloy/biological ceramic bionic composite support and quick forming method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109128165A (en) * | 2018-09-04 | 2019-01-04 | 华中科技大学 | A kind of mold fast processing method based on 3D printing mold core |
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Application publication date: 20130515 |