CN106273416B - It is a kind of for connecting the transmission laser welding method of plastic part - Google Patents
It is a kind of for connecting the transmission laser welding method of plastic part Download PDFInfo
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- CN106273416B CN106273416B CN201610808847.1A CN201610808847A CN106273416B CN 106273416 B CN106273416 B CN 106273416B CN 201610808847 A CN201610808847 A CN 201610808847A CN 106273416 B CN106273416 B CN 106273416B
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- plastic
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1677—Laser beams making use of an absorber or impact modifier
- B29C65/168—Laser beams making use of an absorber or impact modifier placed at the interface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
- B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
- B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2703/00—Use of resin-bonded materials for preformed parts, e.g. inserts
- B29K2703/04—Inorganic materials
- B29K2703/06—Metal powders, metal carbides or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/02—Aluminium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/06—Tin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
- B29K2705/10—Copper
Abstract
The invention discloses a kind of for connecting the transmission laser welding method of plastic part, for the laser welding between the first plastic and the second plastic, wherein by opening up groove on the second plastic, and such as Zinc alloy powder or similar with low melting point of filling wherein, the metal powder of strong thermal conductivity realizes heat transfer, its heat transfer efficiency has obtained great promotion, it can be realized the transmission welding between transparent plastic of the same race, furthermore, in the case that laser goes out photo-labile, metal powder plays a good transitional function, it is excessively high and influence welding quality to avoid instantaneous power.The welding method designs, is easy to operate, convenient to carry out, increases the use scope of transmission welding, also improves to a certain extent and swash light transmissive welding quality.
Description
Technical field
The present invention relates to a kind of for connecting the transmission laser welding method of plastic part.
Background technique
Being usually used in the welding methods of plastics and other composite materials, there are mainly two types of modes: external heat and interior heating.
External heat has generally comprised hot plate welding, hot gas weldering, has squeezed out weldering, interplantation induction welding, interplantation impedance weldering.Hot plate welding is not
It is affected by environment larger that foot place is welding process, and when detaching hot plate, easily bonds with soldered plastics, and overall
Welding efficiency is low；Hot gas weldering then essentially consists in the technical level for excessively relying on operator；It squeezes out welding and is weldable material
Limited, the scope of application has limitation；Interplantation induction welding and interplantation impedance weldering are then the presence because of implants, are not easy to take after welding
Out, the presence of insert will affect quality of weld joint.
Interior heating has generally comprised mechanical heating and electromagnetic heating.Mechanical heating means mainly pass through mantle friction or
Intermolecular friction realizes conversion of the mechanical energy to heat, and common welding method has: supersonic welding, vibratory weld, rotating welding.It is super
Sound wave welding is mainly influenced due to sound field factor and welding region closing etc., so that parameter is not easy to measure；Vibratory weld and friction
Although it is high to weld joint quality, it is all difficult to avoid that the generation of flash, the welding carried out using the method for machinery heating can all have vibration
The remnants of dynamic stress and thermal stress.Electromagnetic heating is then mainly absorption of electromagnetic radiation to be converted into heat, common electromagnetic heating
Welding method has: IR welding, laser welding, RF welding and microwave joining.No maximum temperature during IR welding
Degree, often will cause burn, even results in part to be welded overheat and changes colour rotten；RF welding due to high frequency presence, for operation
Personnel and surrounding enviroment can all pollute；It is easy to appear non-uniform heating during microwave joining, can be generated very when serious
Big residual stress, meanwhile, welding region is limited.
At this point, laser welding is contactless as one kind compared to other kinds of welding method, energy conservation and environmental protection is green
Welding method, and weldering speed is high, heat affected area is small, and no residue, bond strength are high, seam deformation is small, are gradually applied to vapour
The industries such as manufacture of micromachine in turner industry, biologic medical equipment manufacturing and MEMS have vast potential for future development.
Transmission laser welding method is that laser (wavelength is generally 800 ~ 1050nm) is allowed to penetrate transparent test specimen, in upper layer test specimen
By lower layer's specimen and heat is generated with the faying face laser of lower layer's test specimen (adding a certain amount of optical absorbing agent), in hot concentration zones
Domain, plastics are melted, and by transmitting of the heat between two kinds of test specimens, make plastic melt, the plastics under hot melt state divide greatly
Son phase counterdiffusion and entanglement under the action of bonding pressure and thermal expansion, generate Van der Waals force and form strong bonding.Traditional
Transmission welding mainly absorbs laser by three kinds of modes, the first is to add a certain amount of charcoal in lower layer's extinction plastic
It is black；Second is to smear some optical absorbing agents, such as Clearweld in middle layer；The third is in lower layer's plastic plating metal on surface
Film carries out absorption, the transmitting of heat by metal film.
But traditional laser transmission welding has the following deficiencies:
1. the limitation of soldered material exists while must guaranteeing transmission element in most cases with extinction part, this
Sample could interlayer melted, conclude, although additive can solve problems to a certain extent, price is relatively
Height, and practical operation is cumbersome, is unsuitable for the production process of high-volume, automation.
2. the scope of application of transmission welding is restricted, among medical instrument etc. is to the industry for being welded with particular/special requirement,
There is high request etc. to appearance, tends not to meet the requirements.
3. in the welding process, relying primarily on the heat transmitting between puddle and unfused part, heat transfer efficiency
It is limited.
4. seam center is difficult to be controlled, photo-labile may be gone out due to laser, cause the bumps of welding part not
Flat, residual stress welding quality has significant impact after cooling.
5. in the welding process, due to welding parameter setting it is unreasonable, cause instantaneous power excessively high, calcination plastic is right
Environment pollutes.
Summary of the invention
The object of the present invention is to provide a kind of method of laser transmission welding that can be realized transparent plastic part and transparent plastic part,
To expand the scope of application of transmission welding, while promoting the laser transmission welding quality of plastic.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: it is a kind of for connect plastic part laser transmit weldering
Method is connect, for the laser welding between the first plastic and the second plastic, wherein first plastic is transparent plastic part, described
Welding method includes the following steps:
S1, groove is opened up at the position to be welded of second plastic；
S2, low melting point and the metal powder with strong thermal conductivity are filled in the trench；
S3, first plastic is overlapped with the second plastic, and by clamping device by first plastic and
Two plastics are clamped；
S4, laser start and generate laser beam, which passes through first plastic and be directed at the groove
In metal powder and realize laser welding.
Preferably, the metal powder is Zinc alloy powder.
Further, the Zinc alloy powder is Zinc-tin alloy powder, Zn-Al alloy powder, pltine powder, zinc-magnesium
One of alloy powder.
Preferably, welding track of the groove at the position to be welded of second plastic along setting extends.
Further, the welding track is straight line.
Preferably, the groove extends along the width direction of second plastic, and the groove is along second plastic
Width direction run through.
Preferably, the groove extends along the width direction of second plastic, and the groove has opening upward, when
When first plastic matches overlap joint with the second plastic, closing chamber is formed between first plastic and the vallecular cavity of the groove
Room is also provided with multiple air discharge ducts being connected with the closed chamber on first plastic or the second plastic.
Preferably, the depth of the groove is 1mm~2mm.
As a kind of specific embodiment, second plastic is also transparent plastic part.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages: of the invention is used for
The transmission laser welding method of plastic part is connected, wherein by using such as Zinc alloy powder or similar there is low melting point, thermally conductive by force
The metal powder of property realizes heat transfer, and heat transfer efficiency has obtained great promotion, can be realized transparent plastic of the same race
Between transmission welding, in addition, metal powder plays a good transition work in the case where going out photo-labile when laser
With it is excessively high and influence welding quality to avoid instantaneous power.The welding method designs, is easy to operate, convenient to carry out, increases
The use scope of welding is penetrated, also improves to a certain extent and swashs light transmissive welding quality.
Detailed description of the invention
Attached drawing 1 is the working principle diagram of transmission laser welding method of the invention；
Attached drawing 2 is the main view of attached drawing 1；
Attached drawing 3 is the top view of attached drawing 1；
Wherein: 1, the first plastic；2, the second plastic；21, groove；3, metal powder；4, the first backing plate；5, the second backing plate.
Specific embodiment
Technical solution of the present invention is further elaborated with specific embodiment with reference to the accompanying drawing.
Referring to Fig. 1 to welding schematic diagram shown in Fig. 3, the first plastic 1 to be welded and connected is with the second plastic 2
Transparent plastic part, wherein the first plastic 1 is located above, the second plastic 2 is located below, and the top of the first plastic 1 is arranged in laser,
The laser beam that laser generates passes through the first plastic 1 from the top of the first plastic 1 and is projected on the second plastic 2.The laser
Transmission welding successively carries out in accordance with the following steps:
Firstly, opening up groove 21 at the position to be welded of the second plastic 2, the shape of the groove 21 can be according to actual production
Depending on situation, depth is preferably 1mm~2mm.The groove 21 is at the position to be welded of the second plastic 2 along the welding of setting
Track extends.Common welding manner is used in the present embodiment --- profile welding, i.e. welding track are straight line, the groove
21 are arranged to extend straight along the width direction of the second plastic 2.
Then, metal powder 3 is filled in above-mentioned groove 21, which should be low melting point and have strong thermally conductive
The metal powder of property, preferably Zinc alloy powder, specifically can be used Zinc-tin alloy powder, Zn-Al alloy powder, pltine powder
One of end, zinc magnesium alloy powder.The metal powder 3 should be uniformly filled in groove 21.
Then, the first plastic 1 and the second plastic 2 are overlapped, and is moulded the first plastic 1 and second by clamping device
Part 2 is clamped.Specifically, it is connected with the first backing plate 4 on the first plastic 1, the second backing plate 5 is connected on the second plastic 2, clamps
Device is by applying pressing force to the first backing plate 4 and the second backing plate 5, to realize the folder to the first plastic 1 and the second plastic 2
Tightly.
Finally, starting laser, the metal that the laser beam that laser generates passes through the first plastic 1 and is aligned in groove 21
Powder 3 converts heat for laser energy by metal powder 3 and is transferred to the first plastic 1 and the second plastic 2, so that the first modeling
Part 1 is connected with the second plastic 2, to realize laser welding.
In above-mentioned welding processing, if the groove 21 on the second plastic 2 open up be it is open, even groove 21 is along
The width direction of two plastics 2 mutually runs through, the metal powder when the first plastic 1 matches overlap joint with the second plastic 2, inside groove 21
End 3 can be still connected to by the opening of 21 two sides of groove with outside, so as to realize exhaust in laser processing.And if the second modeling
Groove 21 on part 2 open up be it is enclosed, i.e., the groove 21 only has opening upward, when the first plastic 1 is moulded with second
When part 2 matches overlap joint, the first plastic 1 covers the vallecular cavity in the above-mentioned opening of groove 21 and making the first plastic 1 and groove 21
Between form closed chamber, then need to open up on the first plastic 1 or the second plastic 2 at this time and multiple be connected with above-mentioned closed chamber
Logical air discharge duct (not shown).
Certainly, when the second plastic 2 is nontransparent plastic, can also be realized according to above-mentioned welding method the first plastic 1 with
The welding of second plastic 2.
To sum up, transmission laser welding method of the invention, wherein by using such as Zinc alloy powder or similar to eutectic
Point, strong thermal conductivity metal powder realize heat transfer, heat transfer efficiency has obtained great promotion, can be realized transparent
Transmission welding between plastic of the same race, in addition, metal powder plays one very well in the case that laser goes out photo-labile
Transitional function, it is excessively high and influence welding quality to avoid instantaneous power.The welding method designs, is easy to operate, convenient to carry out,
The use scope of transmission welding is increased, also improves to a certain extent and swashs light transmissive welding quality.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand the contents of the present invention and be implemented, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the scope of protection of the present invention.
Claims (5)
1. it is a kind of for connecting the transmission laser welding method of plastic part, for the Laser Welding between the first plastic and the second plastic
It connects, wherein first plastic is transparent plastic part, it is characterised in that: second plastic is also transparent plastic part, the welding side
Method includes the following steps:
S1, groove is opened up at the position to be welded of second plastic, wherein the depth of the groove is 1mm~2mm, institute
The width direction that groove is stated along second plastic extends, and the groove has opening upward, when first plastic and the
When two plastics match overlap joint, closed chamber, first plastic are formed between first plastic and the vallecular cavity of the groove
Or second be also provided with multiple air discharge ducts being connected with the closed chamber on plastic,；
S2, low melting point and the metal powder with strong thermal conductivity are filled in the trench, the metal powder is Zinc alloy powder
End；
S3, first plastic is overlapped with the second plastic, and is moulded first plastic and second by clamping device
Part is clamped；
S4, laser start and generate laser beam, which passes through first plastic and be aligned in the groove
Metal powder and realize laser welding.
2. according to claim 1 for connecting the transmission laser welding method of plastic part, it is characterised in that: the zinc closes
Bronze end is one of Zinc-tin alloy powder, Zn-Al alloy powder, pltine powder, zinc magnesium alloy powder.
3. according to claim 1 for connecting the transmission laser welding method of plastic part, it is characterised in that: the groove
Welding track at the position to be welded of second plastic along setting extends.
4. according to claim 3 for connecting the transmission laser welding method of plastic part, it is characterised in that: the welding
Track is straight line.
5. according to claim 1 for connecting the transmission laser welding method of plastic part, it is characterised in that: the groove
Width direction along second plastic extends, and the groove runs through along the width direction of second plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610808847.1A CN106273416B (en) | 2016-09-08 | 2016-09-08 | It is a kind of for connecting the transmission laser welding method of plastic part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610808847.1A CN106273416B (en) | 2016-09-08 | 2016-09-08 | It is a kind of for connecting the transmission laser welding method of plastic part |
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| CN106273416A CN106273416A (en) | 2017-01-04 |
| CN106273416B true CN106273416B (en) | 2019-02-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108500455A (en) * | 2018-04-04 | 2018-09-07 | 北京航空航天大学 | A kind of connection method of metal material and nonmetallic materials |
| CN109760324B (en) * | 2019-01-09 | 2021-02-09 | 苏州大学 | Molten pool treatment method based on laser transmission welding plastics |
| CN110696379A (en) * | 2019-11-13 | 2020-01-17 | 南京航空航天大学 | Laser-adhesive joint composite connection method for thermoplastic composite material and aluminum alloy single lap joint structure |
| CN113478842B (en) * | 2021-07-12 | 2023-06-02 | 苏州大学 | Hot-pressing powder fixing process for transparent plastic connection |
| CN115157690A (en) * | 2022-05-31 | 2022-10-11 | 苏州大学 | Method and device for realizing dissimilar transparent plastic connection by dual-wavelength laser cooperation |
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| JP4017994B2 (en) * | 2003-02-04 | 2007-12-05 | テクノポリマー株式会社 | Laser welding molding materials and molded products |
| US20090130451A1 (en) * | 2007-11-19 | 2009-05-21 | Tony Farrell | Laser-weldable thermoplastics, methods of manufacture, and articles thereof |
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