A kind of electron beam fuse near net increasing material manufacturing method
The present invention relates to increases material manufacturing technology field more particularly to a kind of electron beam fuse near net increasing material manufacturing methods.
Increases material manufacturing technology also known as 3D printing or rapid prototyping technology.It is one kind using digital three-dimensional model map file as base
Plinth, with metal powder, metal wire material or can adhesiveness plastic or other material, construct object by way of successively stacking accumulation
Technology.Fast Forming Technique is widely used in the fields such as mold manufacturing, industrial design, is now increasingly used for some products
Direct manufacture, the especially application of some high values, such as hip joint or tooth and some airplane components.
Metal parts method for quickly forming and manufacturing mainly have selective laser sintering (SLS), selective laser fusing (SLM),
Laser coaxial powder feeding directly manufactures, electron beam fuse shapes the methods of (EBAM), electron beam selective melting forming (EBM).This is several
Kind of method is all in various degree there is limitation, for example several uses laser for the increasing material manufacturing method of heat source and electron beam constituency
Fusing forming is all to be used as raw shaping material using metal powder, and metal powder manufacture difficulty needed for these methods is big, it is easy by
Not easy to maintain to pollution, use cost is high, and forming efficiency is low, and the forming of electron beam fuse is former as forming using metal wire material
Material, although forming speed is fast, forming accuracy is relatively low.
Existing electron beam fuse rapid prototyping technology is all using electron beam as heat source, in base material or last layer fusing accumulation
Layer surface forms molten bath, and wire is sent into molten bath fusing and realizes the Fast Forming Technique successively accumulated.Due to liquid
Metallic surface tension, the edge of stack layer has been not neat plane, but is made of many arc-shaped metallic spheric surfaces recessed
The surface of convex injustice.In general, pool size more great circle arcuation metallic spheric surface will be bigger, that is, accumulate the uneven journey of layer surface
Degree is also bigger.If selecting thinner welding wire, it is formed by pool size very little, stack layer surface quality is good, but forming efficiency
It is really very low.If selecting thicker welding wire, the efficiency stack layer rough surface that is very high, but being formed of fusing forming accumulation, outside
It sees poor, it usually needs more machine-finish allowance is stayed just to can guarantee the effective dimensions of workpiece.In short, fast using general purpose fuse
Fast former can not take into account forming surface quality and two aspect factor of forming efficiency, and the near net that cannot achieve metal material increases material
The technical problem to be solved in the present invention is, in view of the deficiencies of the prior art, provides a kind of electron beam fuse near net
Increasing material manufacturing method improves the processing efficiency and presentation quality of workpiece using this method so that has after workpiece shaping smaller
Allowance and accurate appearance and size.
In order to solve the above technical problems, the present invention adopts the following technical scheme that.
A kind of electron beam fuse near net increasing material manufacturing method, this method realize that described device includes one based on a device
Vacuum chamber, a carrying platform, an electron gun, a filament wire feeder, a crin wire feeder and a main control unit, the method
Including having the following steps：Step S1 generates part model using computer, and is imported after doing hierarchy slicing processing to part model
Main control unit；Every layer of slice is divided into positioned at the profile portion at edge and in the profile portion by step S2, the main control unit
Filling part；Step S3, the main control unit drive electron gun to carrying platform launching electronics beam；Step S4, the master control list
Member driving filament wire feeder conveys fine wire to carrying platform, while carrying platform being driven to translate, will be thin using electron beam
Wire is melted in carrying platform and forms the profile portion；Step S5, the main control unit drive crin wire feeder to holding
Carrying platform conveys heavy wire, while carrying platform being driven to translate, heavy wire is melted in carrying platform using electron beam and
Form the filling part；Step S6, when one layer of slice processing is completed, the main control unit driving carrying platform corresponds to the layer of slice
Number declines one layer；Step S3 to step S6 is repeated, until multilayer wall is accumulated to form workpiece.
Preferably, further include having vacuum device, for extracting the indoor air of vacuum out, formed very with enabling in vacuum chamber
Preferably, the carrying platform include platform, for drive the translation mechanism that platform moves in the horizontal direction with
And the elevating mechanism for driving platform to move up and down.
Preferably, the profile portion of the slice is multilayer, the longitudinal stacking successively from outside to inside of multilayer profile portion.
Preferably, the profile portion of the slice is multilayer, the laterally stacking successively from down to up of multilayer profile portion.
Preferably, the main control unit drives the filament wire feeder thin to carrying platform conveying with First Speed
Wire, the main control unit drive the crin wire feeder to convey heavy wire with second speed.
Preferably, the main control unit drives the carrying platform to be translated with the first scan mode to utilize electron beam will be thin
Wire is melted in carrying platform and forms the profile portion, and the main control unit drives the carrying platform with the second scanning side
Formula translation forms the filling part so that heavy wire is melted in carrying platform using electron beam, and first scan mode is
Clockwise or counterclockwise along the mode of the profile of slice translation, second scan mode includes clockwise/counterclockwise edge
Mode that the profile of the slice translates in the profile portion, the mode translated by row in the profile portion, and in institute
State at least one of the mode of snakelike translation in profile portion.
Preferably, the thickness of the profile portion and the number of plies are straight according to the material and wire of heavy wire and fine wire
Diameter is configured.
In electron beam fuse near net increasing material manufacturing method disclosed by the invention, when carrying out layered shaping to workpiece, every
The edge of layer slice is provided with profile portion, and every layer of slice is located at the part within profile portion and is provided with filling part, increases material printing
When, carrying platform presses the trajectory-offset of profile portion first, while electron beam melts fine wire, and then heap on the carrying platform
Product forms profile portion, and carrying platform presses the trajectory-offset of filling part later, while electron beam melts heavy wire, and then is taking turns
Accumulation forms filling part on the inside of wide portion, forms slice by profile portion and filling part, repeats the above process and successively processed, most
After form workpiece.The present invention processes slicing profile first with fine wire, and heavy wire is recycled to carry out internal filling to slice,
This processing method reduces the concave-convex degree of workpiece surface, not only increases the aesthetics of workpiece appearance, also carries on the whole
High processing efficiency so that there is smaller allowance and accurate appearance and size after workpiece shaping.
Description of the drawings
Fig. 1 is the flow chart of electron beam fuse near net increasing material manufacturing method of the present invention.
Fig. 2 is the apparatus structure schematic diagram for realizing the method for the present invention.
Fig. 3 is the structural schematic diagram of workpiece.
Fig. 4 is the piece cutting structure schematic diagram in first embodiment of the invention.
Fig. 5 is the piece cutting structure schematic diagram in second embodiment of the invention.
Specific implementation mode
The present invention is described in more detail with reference to the accompanying drawings and examples.
First it should be noted that the words such as " thick " that is previously mentioned in the present embodiment, " thin " are opposite concept rather than certain tool
Body size, using these words be intended merely to it is clearer, expressly illustrate technical scheme of the present invention, be not limited to this
The protection domain of invention.
The invention discloses a kind of electron beam fuse near net increasing material manufacturing methods, in conjunction with shown in Fig. 1 to Fig. 3, this method base
Realize that described device includes a vacuum chamber 1, a carrying platform 2, an electron gun 3, a filament wire feeder 4, one in a device
Crin wire feeder 5 and a main control unit 6, the method includes having the following steps：
Step S1 generates part model using computer, and imports master control list after doing hierarchy slicing processing to part model
Step S2, the main control unit 6 is by every layer of 10 points of slice for positioned at the profile portion 11 at edge and positioned at profile portion 11
Interior filling part 12；
Step S3, the main control unit 6 drive electron gun 3 to 2 launching electronics beam of carrying platform；
Step S4, the main control unit 6 drive filament wire feeder 4 to convey fine wire to carrying platform 2, drive simultaneously
Carrying platform 2 translates, and fine wire is melted in carrying platform 2 using electron beam and forms the profile portion 11；
Step S5, the main control unit 6 drive crin wire feeder 5 to convey heavy wire to carrying platform 2, drive simultaneously
Carrying platform 2 translates, and heavy wire is melted in carrying platform 2 using electron beam and forms the filling part 12；
Step S6, when one layer of slice 10 machines, the main control unit 6 drives the layer of the correspondence of carrying platform 2 slice 10
Number declines one layer；
Step S3 to step S6 is repeated, until the accumulation of multilayer wall 10 forms workpiece 100.
In above-mentioned electron beam fuse near net increasing material manufacturing method, when carrying out layered shaping to workpiece, 10 are sliced at every layer
Edge be provided with profile portion 11, every layer slice 10 be located at profile portion 11 within part be provided with filling part 12, increase material beat
When print, carrying platform 2 presses the trajectory-offset of profile portion 11 first, while electron beam melts fine wire, and then flat in carrying
Accumulation forms profile portion 11 on platform 2, and carrying platform 2 presses the trajectory-offset of filling part 12 later, while electron beam is by heavy wire
Melting, and then filling part 12 is formed in 11 inside accumulation of profile portion, slice 10 is formed by profile portion and filling part, repeats above-mentioned mistake
Journey and successively processed, eventually form workpiece 100.The present invention processes slicing profile first with fine wire, recycles thick gold
Belong to silk and internal filling is carried out to slice, this processing method reduces the concave-convex degree on 100 surface of workpiece, not only increases workpiece
The aesthetics of appearance, also improves processing efficiency on the whole so that with smaller allowance and accurately after workpiece shaping
Appearance and size.
Preferably, main control unit 6 drives the filament wire feeder 4 to convey thin metal to carrying platform 2 with First Speed
Silk, main control unit 6 drive crin wire feeder 5 to convey heavy wire with second speed, and under normal circumstances, First Speed is more than institute
State second speed.
Further, main control unit 6 drives carrying platform 2 to be translated with the first scan mode to utilize electron beam by thin metal
Silk is melted in carrying platform 2 and forms profile portion 11, and main control unit 6 drives carrying platform 2 to be translated with profit with the second scan mode
Heavy wire is melted in carrying platform 2 with electron beam and forms filling part 12, the first scan mode is clockwise or counterclockwise
Along the mode of the profile translation of slice 10, the second scan mode includes the profile of clockwise/counterclockwise edge slice 10 in profile portion
The mode translated in 11, the mode translated by row in profile portion 11, and in profile portion 11 in the mode of snakelike translation
It is at least one.
Further, fine wire and the diameter of heavy wire can according to the shape of Forming Workpiece, dimension precision requirement, at
The characteristic of shape efficiency requirements and material determines.The thickness of the profile portion 11 and the number of plies are according to heavy wire and fine wire
Material and wire diameter are configured.And then meet different processing requests.
In order to provide vacuum processing environment, the present embodiment further includes having vacuum device 7, is used for the sky in vacuum chamber 1
Gas is extracted out, and vacuum space is formed in vacuum chamber 1 to enable.The electron beam that electron gun exports in the space is high energy beam current.Into one
Step ground, vacuum device 7 can be made of components such as vacuum pump, valve, temperature and pressure transmitter original paper and pipelines.
Further, the carrying platform 2 includes platform, the translation mechanism for driving platform to move in the horizontal direction
And the elevating mechanism for driving platform to move up and down.Wherein, the translation of platform in the horizontal direction can be understood as along X-Y axis
The translation in direction, platform vertically move the vertical lifting that can be understood as along Z-direction.
During actual processing, since profile portion is different with the wire fineness used in filling part, in order to enable wheel
The thickness in wide portion can be consistent with filling part, needs fine wire carrying out multiple-level stack, specifically refers to following two preferably
As the first preferred embodiment, Fig. 4 is please referred to, the profile portion 11 of the slice 10 is multilayer, multilayer profile portion
11 longitudinal stackings successively from outside to inside.
As second of preferred embodiment, Fig. 5 is please referred to, the profile portion 11 of the slice 10 is multilayer, multilayer profile portion
11 laterally stackings successively from down to up.
Further, main control unit can be by groups such as industrial computer, PLC PLC technologies, digital control system, power-supply systems
At.Electron beam fuse near net increasing material manufacturing method disclosed by the invention, the profile region for using fine wire fused deposition to be formed
Domain reaches higher dimensional accuracy and surface quality as boundary stack layer, uses heavy wire to accumulate profile portion later
Inside and form internal filled layer, the forming efficiency of workpiece greatly improved.It, can be simultaneous simultaneously when producing workpiece using the present invention
Preferable surface quality and higher production efficiency are cared for, compared with using the monofilament electron beam fuse former of same filament,
Production efficiency of the present invention can be improved 4 times.
The above is preferred embodiments of the present invention, is not intended to restrict the invention, all technology models in the present invention
Interior done modification, equivalent replacement or improvement etc. are enclosed, should be included in the range of of the invention protect.