CN103057117A - Method for improving laser transmission welding connection strength - Google Patents

Method for improving laser transmission welding connection strength Download PDF

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Publication number
CN103057117A
CN103057117A CN2012105819265A CN201210581926A CN103057117A CN 103057117 A CN103057117 A CN 103057117A CN 2012105819265 A CN2012105819265 A CN 2012105819265A CN 201210581926 A CN201210581926 A CN 201210581926A CN 103057117 A CN103057117 A CN 103057117A
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China
Prior art keywords
laser
polymer
welding
metal
transmitting
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CN2012105819265A
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Chinese (zh)
Inventor
刘会霞
赵振关
陈浩
黄创
严长
顾宇轩
孟冬冬
伍彦伟
蔡野
李品
王霄
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Jiangsu University
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Jiangsu University
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Priority to CN2012105819265A priority Critical patent/CN103057117A/en
Publication of CN103057117A publication Critical patent/CN103057117A/en
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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
    • 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
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • 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
    • B29C65/44—Joining a heated non plastics element to a plastics element
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or 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
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0246—Cutting or perforating, e.g. burning away by using a laser or using hot air
    • 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
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3032—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined
    • B29C66/30325—Particular design of joint configurations the joint involving an anchoring effect making use of protrusions or cavities belonging to at least one of the parts to be joined making use of cavities belonging to at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/922—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9221—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force, the mechanical power or the displacement of the joining tools by measuring the pressure, the force or the mechanical power
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
    • 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
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B29C66/7428—Transition metals or their alloys
    • B29C66/74283—Iron or alloys of iron, e.g. steel
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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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
    • B29C66/90—Measuring or controlling the joining process
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a method for improving laser transmission welding connection strength, belonging to the field of laser transmission welding technology, and especially refers to laser transmission welding of metals and polymers. The method comprises pulsed laser treatment is performed to the surface of a metal material which needs welding to form pits on the surface; during the welding, the metal treated by pulsed laser is used as a lower layer light-absorbing material, and the polymer is used as a top layer light transmitting material, by adopting an overlapping connection type, a restrained layer is used for clamping tightly and the welding pressure is applied; a semiconductor laser with continuous energy is used for laser transmission welding to make a surface temperature quickly reaches the melting point of the top layer polymer, so the polymer surface is melted; because pits are formed on the lower metal surface after pulsed laser treatment, the melted polymer on the top surface flows into the pits by the action of the welding pressure to form an engaging interface with a riveting structure at a welding line, thereby improving laser transmission welding connection strength.

Description

A kind ofly improve the method that laser-transmitting is welded to connect intensity
Technical field
The invention belongs to the laser-transmitting welding technology field, refer in particular to and a kind ofly can improve method and the device that metal and polymer laser transmission are welded to connect intensity.Method with pulse laser processing forms pit in the metal surface, the polymer of fusing is subject to the effect inflow pit of welding pressure when carrying out the laser-transmitting welding, form a kind of interlock interface of riveted structure in the commissure, increase the contact area that is connected of metal and polymer, thereby impel metal and polymer better to mutually combine, be welded to connect intensity thereby realize improving laser-transmitting.
Background technology
At present, the laser-transmitting solder technology is at polymer and polymer, polymer and metal etc. are of the same race is used widely with field of welding processing foreign material, be characterized in: fast, noncontact, accurately, the heat affected area is little etc., welding product is accompanied by the development of laser-transmitting solder technology, more and more be applied to the fields such as medical science, auto industry, in document " TPUE membrane laser transmission welding ", welding can be applied in the pharmaceutical products TPUE through laser-transmitting, and research improves but it points out to remain the quality of laser-transmitting jointing further.
Bonding strength is an important evaluation index of weldquality, usually can weigh with peel strength and hot strength.Along with the development of technology, auto parts and components, the encapsulation of electronic device product, medicine equipment etc. are welded to connect intensity to laser-transmitting and have proposed higher requirement.Document " Chemical bond formation during laser bonding of Teflon FEP and titanium " is pointed out, reaction has occured on the actual contact-making surface of laser-transmitting welded seam, metal relies on chemical bonding to realize being connected with polymer, but dependence chemical bond, its intensity can not satisfy the requirement of high strength, durability in the technology such as encapsulation.Also mainly concentrate on for the method that improves laser-transmitting and be welded to connect intensity at present both at home and abroad and optimize its technological parameter aspect, through retrieving: increase along with increased power and speed reduce by parameter optimization being drawn bonding strength in the document " the PET film is connected with the thin titanium board laser-transmitting ", for reaching more high strength, need in theory more high power, less speed, but in actual applications, consider economy, convenience and security, just need to when laser energy is moderate, seek and a kind ofly can significantly improve the method that laser-transmitting is welded to connect intensity, to satisfy high strength in the actual production, the needs of durability.Document " impact of laser-impact surface peening Welded Joints mechanical property " has been explained a kind of method of surface Hardening Treatment raising hot strength of Welded Joints, the method is the raising that is welded to connect again intensity after welding, the destruction that inevitably can cause the rear weld seam of welding in the transmission welding.And the present invention is directed to the material characteristics of metal and polymer, change the metal material surface pattern by pulse laser processing, be formed with in the metal surface and be beneficial to the pit that improves laser absorption, during the laser-transmitting welding, can so that the metal surface be rapidly heated, polymer melts fast, under the effect of welding pressure, the polymer of fusing enters in the pit, forms a kind of interlock interface of riveted structure in the commissure, be welded to connect intensity thereby improved laser-transmitting, especially hot strength.
Summary of the invention
The purpose of this invention is to provide a kind of method that laser-transmitting is welded to connect intensity that improves.According to the laser-transmitting weld characteristics, method with pulse laser processing forms pit on the surface of absorbed layer metal material, when welding, flow to pit so that be subject to the melt polymer of welding pressure effect, form a kind of interlock interface of riveted structure in the commissure, increase the contact area that is connected of metal and polymer, thereby impel metal and polymer better to mutually combine, realize improving laser-transmitting and be welded to connect intensity.
Concrete steps of the present invention are:
A) form pit: the primary morphology metal of surfacing is carried out Ultrasonic Cleaning with ethanol, remove its surface impurity, dry up rear with the welding region shock treatment of pulse laser to the primary morphology metal, forming the degree of depth in the primary morphology metal surface is 50um-130um, the diameter minimum is 40um, and spacing is the pit of 2mm-5mm;
B) weldment assembling: metal is as lower floor's light absorbent after the surface being formed the pulse laser processing of pit, polymer places on the workbench as the upper strata light transmissive material, polymer is overlapped on after the pulse laser processing on the metal, metal is closely pressed close to after polymer and the pulse laser processing, middle very close to each other, restraint layer places on the polymer, pressing plate places the restraint layer top, apply welding pressure by the pressure head that is placed on the pressing plate, by being located at the pressure sensor gaging pressure numerical value between the metal and workbench after the laser treatment;
C) soldering test: the laser instrument generator continuous with energy carries out laser-transmitting to restraint layer, the energy of laser beam, laser facula size are by laser control computer regulated and control, laser beam sees through restraint layer and polymer makes metallic surface temperature reach fast the fusing point of upper strata polymer, polymer surfaces melts, polymer is subject to the welding pressure that pressure head applies, the top layer fusing of polymer also flows to pit, form the interlock interface of riveted structure in the commissure, control device control workbench moves along directions X, regulates the relative position of workpiece and laser beam.
Processed metal can be selected pit according to position and the width of real material welding region among the present invention position and ranks number select the degree of depth of pit will be with reference to the thickness of actual welding metal material simultaneously.
The form that metal is connected with polymer among the present invention adopts overlap joint, that is: metal places lower floor, and polymer places on the metal, and metal has certain contact area that overlaps with polymer.
Realization of the present invention, provide a kind of better, can significantly improve the method that laser-transmitting is welded to connect intensity sooner, convenient, safe and reliable, be welded to connect the intensity field and obtain making progress the method and become more firm so that metal is connected with the part of polymer so that improve laser-transmitting, no longer be subject to the weld seam that the traditional Optimizing Process Parameters method of dependence obtains higher-strength.The method is so that the encapsulation of acquisition durability in medical science and the optoelectronic areas realizes the application of connecting elements in the exigent field of the bonding strengths such as automobile.The present invention promotes the laser-transmitting solder technology in industrial application by the bonding strength that significantly improves the laser-transmitting welding.
Description of drawings
Fig. 1 is the type of attachment schematic diagram of welding material.
Fig. 2 is weldment assembling of the present invention and schematic diagram.
Fig. 3 is pit shape appearance figure after the 304 stainless steel surfaces laser treatment.
Fig. 4 is the profile after embodiment welds.
Among the figure, 1 computer, 2 pressure sensors, metal after 3 pulse laser processing, 4 polymer, 5 restraint layers, 6 pressing plates, 7 laser generators, 8 pressure heads, 9 workbench, 10 Worktable control devices, 11 pits, 12 metal primary morphologies, 13 nylon, 14 enter the nylon of pit, 15 304 stainless steels.
The specific embodiment
The present invention is further described below in conjunction with specific embodiment, welds transparent nylon and 304 stainless steel metals with the present invention.
Weldment is prepared: the transparent light transmissive material nylon 13 of the welding of selection is of a size of 10x10x2mm, light absorbent 304 stainless steels 15 are of a size of 10x10x0.6mm, what the metal surface formed the employing of pit laser instrument is pulse laser, maximum average power 250w, ceiling capacity 60J, pulsewidth is 1.064um, what the laser-transmitting welding laser adopted is the continuous semiconductor laser generator of energy 7, peak power is 130w, and wavelength is 980nm ± 10nm.
The surface treatment of weldment: sample 304 stainless steels 15 usefulness ethanol are carried out Ultrasonic Cleaning, remove its surface impurity, place it on the pulse laser workbench, process parameter according to the welding region position of real material: voltage 490V, defocusing amount is 2mm, frequency is 30Hz, and single hole pulse T is 1.5s, and selecting single pit and pit spacing is 5mm, wash simultaneously the impurity on nylon 13 surfaces with ethanol, dry up rear for subsequent use.The SET pattern of the pit that 304 stainless steels 15 form through the pulse laser processing rear surfaces as shown in Figure 3, the pit mean depth of processing with pulse laser is 57.27um, the pit average diameter is 683.15um.
The assembling of weldment and welding: 304 stainless steels 15 that step 2 is obtained are placed on the workbench 9 of semiconductor laser as lower floor's light absorbent, nylon 13 is as the upper strata light absorbent, by laser generator control computer 1 regulating power be: 60w, spot diameter are 2mm.The overlap joint type of attachment that nylon 13 and 304 stainless steels 15 adopt as shown in Figure 1, nylon 13 and 304 stainless steels 15 are closely pressed close to, middle very close to each other, with K9 glass as restraint layer, apply welding pressure 0.069KN at restraint layer placement pressing plate 6 on glass and at pressing plate with pressure head 8, laser instrument carries out the laser-transmitting welding according to 180mm/min speed, realizes that by Worktable control device 10 workpiece moves along directions X during the laser-transmitting welding, is used for adjusting the relative position of workpiece and laser beam.
Form high-intensity welding point, the butt welded seam analysis can be seen the nylon 14 that enters pit, and butt welded seam carries out tension test and can obtain hot strength and improved 120%, as shown in Figure 4 the shape appearance figure after the welding.

Claims (4)

1. one kind is improved the method that laser-transmitting is welded to connect intensity, it is characterized in that, concrete steps are:
A) form pit: the primary morphology metal (12) of surfacing is carried out Ultrasonic Cleaning with ethanol, remove its surface impurity, dry up rear with the welding region shock treatment of pulse laser to primary morphology metal (12), forming the degree of depth on primary morphology metal (12) surface is 50um-130um, the diameter minimum is 40um, and spacing is the pit of 2mm-5mm;
B) weldment assembling: metal (3) is as lower floor's light absorbent after the surface being formed the pulse laser processing of pit, polymer (4) places on the workbench (9) as the upper strata light transmissive material, polymer (4) is overlapped on after the pulse laser processing on the metal (3), metal (3) is closely pressed close to after polymer (4) and the pulse laser processing, middle very close to each other, restraint layer (5) places on the polymer (4), pressing plate (6) places restraint layer (5) top, apply welding pressure by the pressure head (8) that is placed on the pressing plate (6), by being located at pressure sensor (2) the gaging pressure numerical value between the metal (3) and workbench (9) after the laser treatment;
C) soldering test: the laser instrument generator (7) continuous with energy carries out laser-transmitting to restraint layer (5), the energy of laser beam, the laser facula size is by laser control computer (1) regulation and control, laser beam sees through restraint layer (5) and polymer (4) makes metallic surface temperature reach fast the fusing point of upper strata polymer (4), melt on polymer (4) surface, polymer (4) is subject to the welding pressure that pressure head (8) applies, the top layer fusing of polymer (4) also flows to pit (11), form the interlock interface of riveted structure in the commissure, control device (10) control workbench (9) moves along directions X, regulates the relative position of workpiece and laser beam.
2. according to claim 1 a kind of improves the method that laser-transmitting is welded to connect intensity, it is characterized in that described steps A) in, position and and ranks number that described primary morphology metal (12) is selected pit according to position and the width of real material welding region.
3. according to claim 1 and 2 a kind of improves the method that laser-transmitting is welded to connect intensity, it is characterized in that described step B) in, described restraint layer (5) is transparent for application laser, when laser beam sees through without obvious energy loss.
4. according to claim 1 and 2 a kind of improves the method that laser-transmitting is welded to connect intensity, it is characterized in that, described polymer (4) is transparent nylon, and described primary morphology metal (11) is 304 stainless steel metals, with K9 glass as restraint layer.
CN2012105819265A 2012-12-28 2012-12-28 Method for improving laser transmission welding connection strength Pending CN103057117A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009226643A (en) * 2008-03-19 2009-10-08 Aisin Seiki Co Ltd Bonding method and bonded body
JP2010076437A (en) * 2008-08-29 2010-04-08 Toray Ind Inc Manufacturing method for composite of molding comprising thermoplastic resin composition and metal
JP2010274279A (en) * 2009-05-27 2010-12-09 Nagoya Industrial Science Research Inst Method for joining member using laser
WO2012020531A1 (en) * 2010-08-11 2012-02-16 株式会社日立製作所 Laser bonding method
CN102626828A (en) * 2012-04-26 2012-08-08 江苏大学 Method and device for producing micro micro pits with high efficiency based on laser shock waves
CN102712136A (en) * 2010-01-12 2012-10-03 日本轻金属株式会社 Method of laser joining of aluminum alloy member and resin member

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009226643A (en) * 2008-03-19 2009-10-08 Aisin Seiki Co Ltd Bonding method and bonded body
JP2010076437A (en) * 2008-08-29 2010-04-08 Toray Ind Inc Manufacturing method for composite of molding comprising thermoplastic resin composition and metal
JP2010274279A (en) * 2009-05-27 2010-12-09 Nagoya Industrial Science Research Inst Method for joining member using laser
CN102712136A (en) * 2010-01-12 2012-10-03 日本轻金属株式会社 Method of laser joining of aluminum alloy member and resin member
WO2012020531A1 (en) * 2010-08-11 2012-02-16 株式会社日立製作所 Laser bonding method
CN102626828A (en) * 2012-04-26 2012-08-08 江苏大学 Method and device for producing micro micro pits with high efficiency based on laser shock waves

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XIAO WANG 等: "Modeling and optimization of laser transmission joining process between PET and 316L stainless steel using response surface methodology", 《OPTICS & LASER TECHNOLOGY》 *

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