CN114407372A - Device and method for improving laser connection strength of metal piece and plastic piece - Google Patents
Device and method for improving laser connection strength of metal piece and plastic piece Download PDFInfo
- Publication number
- CN114407372A CN114407372A CN202111403530.7A CN202111403530A CN114407372A CN 114407372 A CN114407372 A CN 114407372A CN 202111403530 A CN202111403530 A CN 202111403530A CN 114407372 A CN114407372 A CN 114407372A
- Authority
- CN
- China
- Prior art keywords
- laser
- metal
- plastic
- piece
- metal piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 111
- 239000002184 metal Substances 0.000 title claims abstract description 111
- 239000004033 plastic Substances 0.000 title claims abstract description 74
- 229920003023 plastic Polymers 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 25
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 20
- 239000004917 carbon fiber Substances 0.000 claims description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 20
- 239000004677 Nylon Substances 0.000 claims description 10
- 229920001778 nylon Polymers 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 6
- 230000001965 increasing effect Effects 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 229920002530 polyetherether ketone Polymers 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010963 304 stainless steel Substances 0.000 description 19
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 19
- 239000000758 substrate Substances 0.000 description 19
- 238000004372 laser cladding Methods 0.000 description 10
- 238000001035 drying Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 229910000078 germane Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000004506 ultrasonic cleaning Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 229920000299 Nylon 12 Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B29C66/001—Joining in special atmospheres
- B29C66/0012—Joining in special atmospheres characterised by the type of environment
- B29C66/0014—Gaseous environments
- B29C66/00141—Protective gases
-
- 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
- B29C66/022—Mechanical pre-treatments, e.g. reshaping
- B29C66/0222—Mechanical pre-treatments, e.g. reshaping without removal of material, e.g. cleaning by air blowing or using brushes
-
- 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
- B29C66/028—Non-mechanical surface pre-treatments, i.e. by flame treatment, electric discharge treatment, plasma treatment, wave energy or particle radiation
-
- 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
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/824—Actuating mechanisms
- B29C66/8242—Pneumatic or hydraulic drives
-
- 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
Abstract
The invention relates to the field of metal and plastic connection, and discloses a method for improving laser connection strength of a metal piece and a plastic piece, which comprises the following steps: (1) pretreating the surface of the metal piece; (2) enabling an incident beam of the laser to correspond to a position to be processed of the metal; (3) starting a laser and a coaxial powder feeder to deposit a convex micro-texture on the surface of the metal piece to obtain the metal piece with the convex micro-texture on the surface; (4) placing the metal piece obtained in the step (3) above the plastic piece, wherein the metal piece with the convex micro-texture is obtained, and one side of the convex micro-texture of the metal is attached to the plastic; (5) applying pressure to the joint of the metal piece and the plastic piece; (6) and carrying out laser connection on the metal piece and the plastic piece. The invention solves the problem of low quality connection of the connection joint of the metal piece and the plastic piece, and has the advantages of ingenious design, reasonable design and strong adaptability.
Description
Technical Field
The invention relates to the field of dissimilar material connection, in particular to a device and a method for improving laser connection strength of a metal piece and a plastic piece.
Background
With the gradual improvement of the demand of the manufacturing industry in advanced fields such as automobiles, rail transit, aerospace and the like on the structural lightweight, the connection of heterogeneous lightweight materials becomes a great hotspot for realizing the lightweight. The heterostructure has the characteristics of light weight, high strength and impact resistance through the compounding of plastic and metal. The high-quality connection of the two materials is realized, and great advantages and application prospects are realized for realizing light weight.
The weakness of such composite structures is often at the location of the joint, which means that the quality of the joint directly determines the useful life of the composite structure. The bonding of metal and plastic is limited by the distinct thermophysical properties such as melting point, thermal conductivity, and linear expansion coefficient, which make it difficult to form high quality joints. At present, the connection process of the metal piece and the plastic piece mainly comprises riveting, gluing and thermal connection. The riveting technology is contrary to the lightweight concept due to the use of screws and the like; the aging phenomenon of the bonding technology is serious, and the environmental pollution can be caused. Laser welding has a good application prospect in the thermal connection of metal parts and plastic parts by virtue of the advantages of high efficiency, small heat affected zone, good flexibility and the like. For example, in a chinese patent (application No. 201210581561.6) of "a novel laser transmission welding connection method", pits are formed on a metal surface to change the surface morphology, and then the connection between plastic and metal materials is realized by laser transmission connection. However, the method of chemical etching to form the pits is not environmentally friendly and is difficult to treat the local part of the metal part. The technology only aims at the plastic with better transmittance, and cannot adapt to the composite plastic with reinforced fiber and poorer transmittance. In addition, the metal piece of this technique needs to be handled in advance, and the chemical treatment time is longer, and needs to keep warm, leads to whole connection efficiency greatly reduced, connection cost to promote by a wide margin, is unfavorable for popularizing and applying.
Disclosure of Invention
In order to solve the problem of low quality connection of a connecting joint of a metal piece and a plastic piece in the prior art, the invention provides a device and a method for improving the laser connection strength of the metal piece and the plastic piece.
The invention adopts the specific scheme that: a method of increasing the laser bonding strength of a metal part to a plastic part, the method comprising the steps of:
(1) pretreating the surface of the metal piece;
(2) enabling an incident beam of the laser to correspond to a position to be processed of the metal;
(3) starting a laser and a coaxial powder feeder to deposit a convex micro-texture on the surface of the metal piece to obtain the metal piece with the convex micro-texture on the surface;
(4) placing the metal piece obtained in the step (3) above the plastic piece, wherein the metal piece with the convex micro-texture is obtained, and one side of the convex micro-texture of the metal is attached to the plastic;
(5) applying pressure to the joint of the metal piece and the plastic piece;
(6) and carrying out laser connection on the metal piece and the plastic piece.
The width or diameter of the convex microtexture is 500-800 μm, and the height is 200-600 μm.
The laser connection condition in the step (6) is that the laser power is 600W-1200W, the laser scanning speed is 0.3m/min-0.9m/min, the laser defocusing amount is 0 mm-60 mm, the laser deflection angle is 0-15 degrees, the protective gas flow is 15L/min-20L/min, and the cylinder pressure is 0.3-0.6 MPa.
The metal piece is any one of titanium alloy, stainless steel, aluminum alloy and magnesium alloy.
The plastic part is made of carbon fiber reinforced thermoplastic composite materials, such as any one of carbon fiber reinforced polyether ether ketone, carbon fiber reinforced nylon, carbon fiber reinforced polyethylene terephthalate or carbon fiber reinforced polyphenylene sulfide.
And the laser is protected by inert gas during working.
On the other hand, the invention provides a device for improving the laser connection strength of a metal piece and a plastic piece, which comprises a laser, a coaxial powder feeder and a mobile platform; the coaxial powder feeder is arranged below the laser head; the laser connecting clamp is arranged above the cylinder clamp, plastic and metal are placed between the cylinder clamp and the laser connecting clamp, and the plastic and the metal are clamped between the laser connecting clamp and the cylinder clamp by jacking the output end of the cylinder when the laser connecting clamp and the cylinder clamp are connected.
The motor is arranged on one side of the moving platform, the output end of the motor is connected with the lead screw, the lead screw is connected with the moving platform, and the motor drives the lead screw to rotate and then drives the moving platform to move.
A gasket is arranged below the moving platform, and the plastic sheet or the metal sheet is placed on the gasket.
Compared with the prior art, the invention has the following beneficial effects:
the laser and the coaxial powder feeder are started to melt the convex micro-texture on the surface of the metal piece to obtain the metal piece with the convex micro-texture on the surface, the metal piece with the convex micro-texture is placed above the plastic piece, and one side of the convex micro-texture of the metal is attached to the plastic to complete laser connection. The invention can realize the high-efficiency and high-quality connection of the metal piece and the plastic piece, and solves the problem of low quality connection of the connection joint of the metal piece and the plastic piece in the prior art.
On the other hand, the laser is used as a heat source, the damage caused by thermal deformation and thermal damage is reduced, the preparation of the surface convex microtexture is carried out on the surface of the metal piece, the wetting and spreading of the molten plastic on the surface of the metal substrate is promoted under the action of the interface pressure through optimizing the action area, power, scanning speed and deflection angle of the continuous laser and the shape and size of the microtexture on the surface of the metal substrate, the microtexture on the surface of the metal substrate is embedded in the plastic, the interface contact area is increased, the occurrence of mechanical embedding is promoted, the chemical bonding forming probability is increased, and therefore the laser connection bonding strength of the metal piece and the plastic piece is improved.
Drawings
FIG. 1 is a schematic view of an apparatus for preparing a surface raised micro-texture on a surface of a metal part according to the present invention;
FIG. 2 is a schematic view of a laser bonding apparatus for bonding a metal part to a plastic part according to the present invention;
FIG. 3 is a schematic view of a mobile platform and cylinder according to the present invention;
FIG. 4 is a right side view of FIG. 3;
fig. 5 is a top view of fig. 3.
Wherein the reference numerals are respectively:
1-a laser head; 2-a coaxial powder feeder; 3-metal powder; 4-a laser beam; 5-fastening screws; 6-moving the platform clamp; 7-laser cladding fixture; 8-laser connecting the clamp; 9-moving the platform; 10-a cylinder clamp; 11-a metal piece; 12-a plastic part; 13-a gasket; 14-convex microtexture; 15-laser joining weld; 16-an electric machine; 17-a lead screw; 18-a cylinder; 19-thread machining of holes.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Exemplary embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals. It is to be noted that the embodiments and features of the present invention may be combined with each other without conflict. To avoid obscuring the present embodiment with unnecessary detail, only the structures and method steps that are germane to the present invention are shown in the drawings, and details that are not germane to the present invention are omitted.
The invention provides a method for improving the laser connection strength of a metal piece and a plastic piece, which comprises the following steps:
(1) pretreating the surface of the metal piece;
(2) enabling an incident beam of the laser to correspond to a position to be processed of the metal;
(3) starting a laser and a coaxial powder feeder to deposit a convex micro-texture on the surface of the metal piece to obtain the metal piece with the convex micro-texture on the surface;
(4) placing the metal piece obtained in the step (3) above the plastic piece, wherein the metal piece with the convex micro-texture is obtained, and one side of the convex micro-texture of the metal is attached to the plastic;
(5) applying pressure to the joint of the metal piece and the plastic piece;
(6) and carrying out laser connection on the metal piece and the plastic piece.
The plastic part is melted on one surface close to the metal part due to heat conduction, the convex microtexture on the lower surface of the metal is embedded into the molten plastic under the action of pressure, and after cooling, the metal part and the plastic part are connected into a whole.
And (2) pretreating the surface of the metal piece in the step (1), cleaning the surface of the metal piece for 30s in a mixed solution consisting of 80% of distilled water, 15% of nitric acid and 5% of hydrofluoric acid to remove a surface oxide film, then drying the metal piece by using a blower, placing the plates to be connected into an ultrasonic cleaning container, cleaning the plates for 180s in a mixed solution of 50% of acetone and 50% of alcohol, and then placing the cleaned plates into a drying box at 80 ℃ to dry for 24 h.
The width or diameter of the convex microtexture is 500-800 μm, and the height is 200-600 μm.
The laser connection condition in the step (6) is that the laser power is 600W-1200W, the laser scanning speed is 0.3m/min-0.9m/min, the laser defocusing amount is 0 mm-60 mm, the laser deflection angle is 0-15 degrees, the protective gas flow is 15L/min-20L/min, and the cylinder pressure is 0.3-0.6 MPa.
The metal piece is any one of titanium alloy, stainless steel, aluminum alloy and magnesium alloy.
The plastic part is made of carbon fiber reinforced thermoplastic composite materials, such as any one of carbon fiber reinforced polyether ether ketone, carbon fiber reinforced nylon, carbon fiber reinforced polyethylene terephthalate or carbon fiber reinforced polyphenylene sulfide.
And the laser is protected by inert gas during working.
On the other hand, the invention provides a device for improving the laser connection strength of a metal piece and a plastic piece, which comprises a laser, a coaxial powder feeder 2 and a mobile platform 9; the coaxial powder feeder 2 is arranged below a laser head 1 of the laser; a moving platform clamp 6 is arranged on the moving platform 9, and a connecting hole is formed in the moving platform clamp 6; an air cylinder 18 is arranged below the moving platform 9, the output end of the air cylinder 18 is connected with an air cylinder clamp 10, a laser connecting clamp 8 is placed right above the air cylinder clamp 10, plastic 12 and metal 11 are placed between the air cylinder clamp 10 and the laser connecting clamp 8, and the air cylinder output end is pushed up to clamp the plastic and the metal between the laser connecting clamp and the air cylinder clamp during connection. The laser connecting clamp extends into the connecting hole to play a role in fixing.
And (4) using a laser cladding clamp 7 for the step (3) and using a laser connecting clamp 8 for the step (4). The movable platform clamp 6 is used for fixing a laser cladding clamp and a laser connecting clamp.
The coaxial powder feeder 2 is provided with coaxial four-hole powder feeding pipes to be matched with the laser head 1, and can convey various metal powder. The laser is further preferably a fiber laser.
The laser head 1 of the optical fiber laser is provided with a coaxial four-hole powder feeding pipe, so that the forward, backward, leftward and rightward movement is realized, the left and right pitching movement can be realized, and the position of an incident laser beam corresponds to a processing hole.
The mobile platform is characterized in that a motor 16 is arranged on one side of the mobile platform 9, the output end of the motor 16 is connected with a lead screw 17, the lead screw 17 is connected with the mobile platform 9, and the motor 16 drives the lead screw 17 to rotate and then drives the mobile platform to move 9. A gasket 13 is arranged below the moving platform 9, and the metal sheet 11 is placed on the gasket 13.
Example 1
A method for improving the laser connection strength of a metal piece and a plastic piece is provided, wherein the metal piece is 304 stainless steel; the plastic part is carbon fiber reinforced nylon (CF-PA 6).
(1) Pretreating the surface of the metal piece; placing a 304 stainless steel substrate to be connected in a mixed solution composed of 80% of distilled water, 15% of nitric acid and 5% of hydrofluoric acid, cleaning for 30s to remove a surface oxide film, then drying by using a blower, placing a CF-PA6 plate to be connected in an ultrasonic cleaning container, cleaning for 180s by using a mixed solution of 50% of acetone and 50% of alcohol, and then placing the cleaned CF-PA6 plate in a drying box at 80 ℃ and drying for 24 h;
(2) clamping the 304 stainless steel substrate 11 subjected to the treatment in a clamping manner shown in fig. 1, moving the moving platform 9 to the center of the cylinder 18 by using a motor and aligning the center line of the moving platform 9, centering the laser cladding fixture on the moving platform 9, and fastening the laser cladding fixture on the moving platform by using the fastening screw 5, the moving platform fixture 6 and the threaded machining hole 19 on the moving platform 9; the cylinder clamp 10 and the 304 stainless steel substrate 11 are sequentially arranged from bottom to top, the position to be processed of the 304 stainless steel substrate 11 corresponds to the position of a processing hole of the laser cladding clamp, the cylinder is pressurized to jack up the cylinder clamp 10 and the 304 stainless steel substrate 11, the 304 stainless steel substrate 11 is clamped and fixed, and the position of a laser head is adjusted by a laser head motion control system to correspond to the position of a starting point to be processed.
(3) Preparing linear/latticed raised micro-textures 14 on the surface of the 304 stainless steel substrate 11 subjected to the operation by using the laser cladding method shown in FIG. 1, setting the raised micro-textures on the laser cladding surface to be surface raised micro-textures with the square grid morphology with the line spacing of 1mm by using a laser head control system of an optical fiber laser, planning a laser scanning path and writing a path program; setting the laser power to 1200W, the laser scanning rate to 0.8m/min, the laser defocusing amount to 0mm, the laser deflection angle to 0 degrees, the shielding gas flow to 15L/min, and the powder feeder flow to 15L/min, selecting 304 stainless steel powder as the metal powder 3, setting the shielding gas advance time to 8s, and writing a laser parameter program; inputting laser parameters and a path program into a laser head computer control system to control a scanning path of the laser head, controlling output parameters and shielding gas of a laser by a fiber laser control system, and controlling powder feeding and powder feeding gas by a coaxial powder feeder control system; the laser cladding surface convex microtexture with the width of 600 mu m and the height of 500 mu m is obtained.
(4) Taking down the 304 stainless steel substrate 11 subjected to the operation, respectively removing redundant powder and splashes on the surface by using a hairbrush and a wire brush, clamping the 304 stainless steel substrate and carbon fiber reinforced nylon by using a clamping mode of a schematic diagram of a laser connection metal piece and a plastic piece shown in figure 2, moving a moving platform 9 to the center of an air cylinder 18 by using a motor, aligning the center line of the moving platform 9, centering a laser connection clamp 8 suitable for laser connection on the moving platform 9, and fastening the laser connection clamp 8 on the moving platform by using a fastening screw 5, a moving platform clamp 6 and a thread processing hole 19 on the moving platform 9; the method comprises the steps of overlapping a 304 stainless steel substrate and carbon fiber reinforced nylon from top to bottom, wherein one surface for preparing the laser cladding surface convex micro-texture is connected with a plastic piece, placing the surface on a cylinder clamp 10, placing a gasket 13 with the thickness consistent with that of the plastic piece under the 304 stainless steel substrate, enabling the position to be processed of the 304 stainless steel substrate to correspond to the position of a processing hole of a laser connecting clamp 8, pressurizing a cylinder to jack the cylinder clamp 10, the 304 stainless steel substrate and the carbon fiber reinforced nylon upwards, clamping and fixing the 304 stainless steel substrate and the carbon fiber reinforced nylon, and adjusting the position of a laser head to enable the position to correspond to the position of a starting point to be processed.
(5) Connecting the 304 stainless steel substrate and the carbon fiber reinforced nylon together by using the laser connection process shown in FIG. 2, planning a connection path, and writing a path program; setting the laser power to 1000W, setting the laser scanning speed to 0.5m/min, setting the laser defocusing amount to 0mm, setting the laser deflection angle to 0 degree, setting the protective gas flow to 15L/min, and writing a laser parameter program; laser parameters and path programs are input into a laser head computer control system, a laser head motion control system controls a laser head scanning path, and a fiber laser control system controls output parameters of a laser and protective gas. And (3) laser connection of the 304 stainless steel substrate 11 and the carbon fiber reinforced nylon 12 is realized, and after cooling, the 304 stainless steel/carbon fiber reinforced nylon CF-PA6 laser connection joint with the convex microtexture on the metal surface can be obtained.
At present, a metal and plastic heterostructure is one of the methods for realizing further structural lightweight by replacing an all-metal structure, and the strength of a joint is the key point for determining whether the metal and plastic structure can be applied. The method provided by the invention can be used for enhancing the connection strength of metal and plastic, realizing the strength of the metal and plastic heterostructure connection joint by increasing the contact area of the connection interface and the mechanical interlocking acting force, realizing the integration of pretreatment equipment and connection equipment, and facilitating application and development.
The laser and the coaxial powder feeder are started to melt the convex micro-texture on the surface of the metal piece to obtain the metal piece with the convex micro-texture on the surface, the metal piece with the convex micro-texture is placed above the plastic piece, and one side of the convex micro-texture of the metal is attached to the plastic to complete laser connection. The invention can realize the high-efficiency and high-quality connection of the metal piece and the plastic piece, and solves the problem of low quality connection of the connection joint of the metal piece and the plastic piece in the prior art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A method for improving the laser bonding strength of a metal part and a plastic part, comprising the steps of:
(1) pretreating the surface of the metal piece;
(2) enabling an incident beam of the laser to correspond to a position to be processed of the metal;
(3) starting a laser and a coaxial powder feeder to deposit a convex micro-texture on the surface of the metal piece to obtain the metal piece with the convex micro-texture on the surface;
(4) placing the metal piece obtained in the step (3) above the plastic piece, wherein the metal piece with the convex micro-texture is obtained, and one side of the convex micro-texture of the metal is attached to the plastic;
(5) applying pressure to the joint of the metal piece and the plastic piece;
(6) and carrying out laser connection on the metal piece and the plastic piece.
2. The method of claim 1, wherein the raised microtexture has a width or diameter of 500 to 800 μm and a height of 200 to 600 μm.
3. The method for improving the laser connection strength of the metal part and the plastic part according to claim 1, wherein the laser connection conditions in the step (6) are that the laser power is 600W-1200W, the laser scanning speed is 0.3m/min-0.9m/min, the laser defocusing amount is 0 mm-60 mm, the laser deflection angle is 0-15 degrees, the protective gas flow is 15L/min-20L/min, and the cylinder pressure is 0.3-0.6 MPa.
4. The method of claim 1, wherein the metal part is any one of titanium alloy, stainless steel, aluminum alloy and magnesium alloy.
5. The method of claim 1, wherein the plastic part is a carbon fiber reinforced thermoplastic composite material, such as any one of carbon fiber reinforced polyetheretherketone, carbon fiber reinforced nylon, carbon fiber reinforced polyethylene terephthalate, or carbon fiber reinforced polyphenylene sulfide.
6. The method of claim 1 wherein the laser is operated under inert gas shielding.
7. A device for use in the method for increasing the laser bonding strength of metal and plastic parts according to any of claims 1 to 6, wherein the device comprises a laser, a coaxial powder feeder (2) and a moving platform (9); the coaxial powder feeder (2) is arranged below a laser head (1) of the laser; the laser connecting clamp is characterized in that an air cylinder (18) is arranged below the moving platform (9), the output end of the air cylinder (18) is connected with an air cylinder clamp (10), the laser connecting clamp (8) is placed above the air cylinder clamp (10), plastic and metal are placed between the air cylinder clamp (10) and the laser connecting clamp (8), and the plastic and the metal are clamped between the laser connecting clamp (8) and the air cylinder clamp (10) through upward pushing of the output end of the air cylinder (18) during connection.
8. The device for improving the laser connection strength of the metal part and the plastic part according to claim 7, wherein a motor is arranged on one side of the moving platform (9), an output end of the motor (16) is connected with a lead screw (17), the lead screw (17) is connected with the moving platform (9), and the motor (16) drives the lead screw (17) to rotate and then drives the moving platform (9) to move.
9. The device for improving the laser connection strength of the metal part and the plastic part as claimed in claim 8, wherein a gasket (13) is arranged below the moving platform (9), and the metal sheet is placed on the gasket (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111403530.7A CN114407372A (en) | 2021-11-24 | 2021-11-24 | Device and method for improving laser connection strength of metal piece and plastic piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111403530.7A CN114407372A (en) | 2021-11-24 | 2021-11-24 | Device and method for improving laser connection strength of metal piece and plastic piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114407372A true CN114407372A (en) | 2022-04-29 |
Family
ID=81266594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111403530.7A Pending CN114407372A (en) | 2021-11-24 | 2021-11-24 | Device and method for improving laser connection strength of metal piece and plastic piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114407372A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3140566A1 (en) * | 2022-10-10 | 2024-04-12 | Psa Automobiles Sa | Process for assembling two parts, one of which is metallic. |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074625A (en) * | 2013-01-16 | 2013-05-01 | 上海交通大学 | Movable laser cladding and repairing system |
| KR20160033528A (en) * | 2014-09-18 | 2016-03-28 | 주식회사 성우하이텍 | Welding method for steel sheet and carbon fiber reinforced plastics sheet |
| JP2017190521A (en) * | 2016-04-11 | 2017-10-19 | 知宏 前田 | Formation method of superimposed fine particle structure, and bonding method of metal and plastic member using the same |
| CN109175367A (en) * | 2018-10-25 | 2019-01-11 | 武汉钢铁有限公司 | Increase material, etc. materials composition metal 3D laser forming device and its method |
| CN109226755A (en) * | 2018-10-16 | 2019-01-18 | 江苏大学 | Improve the increasing material manufacturing device and method for increasing material component deposition interfacial bonding strength |
| CN109249621A (en) * | 2018-09-26 | 2019-01-22 | 北京航空航天大学 | A method of selective laser processing connection metal and thermoplastic composite based on interlocking structure |
| CN109317673A (en) * | 2018-10-19 | 2019-02-12 | 江苏大学 | A kind of laser gain material manufacturing device and method |
| CN109940899A (en) * | 2017-12-21 | 2019-06-28 | 通用汽车环球科技运作有限责任公司 | The micro- anchor structure of induced with laser and passivation layer and its manufacturing method for metal-polymer composite joint |
| CN111168240A (en) * | 2020-02-12 | 2020-05-19 | 吉林大学 | Laser welding method for aluminum alloy and plastic, grinding clamp and clamping clamp |
| CN112776348A (en) * | 2021-02-01 | 2021-05-11 | 北京工业大学 | Fiber reinforced thermoplastic composite material and metal laser pressure welding method |
-
2021
- 2021-11-24 CN CN202111403530.7A patent/CN114407372A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074625A (en) * | 2013-01-16 | 2013-05-01 | 上海交通大学 | Movable laser cladding and repairing system |
| KR20160033528A (en) * | 2014-09-18 | 2016-03-28 | 주식회사 성우하이텍 | Welding method for steel sheet and carbon fiber reinforced plastics sheet |
| JP2017190521A (en) * | 2016-04-11 | 2017-10-19 | 知宏 前田 | Formation method of superimposed fine particle structure, and bonding method of metal and plastic member using the same |
| CN109940899A (en) * | 2017-12-21 | 2019-06-28 | 通用汽车环球科技运作有限责任公司 | The micro- anchor structure of induced with laser and passivation layer and its manufacturing method for metal-polymer composite joint |
| CN109249621A (en) * | 2018-09-26 | 2019-01-22 | 北京航空航天大学 | A method of selective laser processing connection metal and thermoplastic composite based on interlocking structure |
| CN109226755A (en) * | 2018-10-16 | 2019-01-18 | 江苏大学 | Improve the increasing material manufacturing device and method for increasing material component deposition interfacial bonding strength |
| CN109317673A (en) * | 2018-10-19 | 2019-02-12 | 江苏大学 | A kind of laser gain material manufacturing device and method |
| CN109175367A (en) * | 2018-10-25 | 2019-01-11 | 武汉钢铁有限公司 | Increase material, etc. materials composition metal 3D laser forming device and its method |
| CN111168240A (en) * | 2020-02-12 | 2020-05-19 | 吉林大学 | Laser welding method for aluminum alloy and plastic, grinding clamp and clamping clamp |
| CN112776348A (en) * | 2021-02-01 | 2021-05-11 | 北京工业大学 | Fiber reinforced thermoplastic composite material and metal laser pressure welding method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3140566A1 (en) * | 2022-10-10 | 2024-04-12 | Psa Automobiles Sa | Process for assembling two parts, one of which is metallic. |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110977172A (en) | Electric arc additive and laser-assisted thermoplastic forming composite manufacturing device and method | |
| CN112123789A (en) | Laser connection method for metal/carbon fiber reinforced thermoplastic composite material | |
| CN111215752A (en) | Multi-mode filament-powder mixed laser additive manufacturing system and method | |
| CN110052710A (en) | A kind of aluminium alloy laser welding method | |
| CN105479025A (en) | Method for brazing diamond tool through lasers with assistance of ultrasonic waves | |
| CN102699533A (en) | Self-adaptive laser welding fixture for ultra-thin metal bipolar plate of fuel cell | |
| CN114407372A (en) | Device and method for improving laser connection strength of metal piece and plastic piece | |
| CN111299828B (en) | Thick plate ultra-narrow gap laser wire-filling thermal conduction welding method | |
| CN103706937A (en) | Turbine shaft electron beam welding elastic clamp | |
| CN105984128A (en) | Laser welding method for plastic | |
| CN110538997B (en) | Laser pre-cladding auxiliary plasma additive manufacturing equipment and method | |
| CN112170385B (en) | Laser cleaning device and method for sealing and glue removing of composite material hot-pressing tool | |
| CN102021561B (en) | Laser top-surface cladding method | |
| CN107442920B (en) | High-energy beam precision welding tool and welding method for thin-wall cylindrical body | |
| CN110614439A (en) | High-reflectivity material laser connection method and device | |
| CN109365976A (en) | A kind of production method and mold of Resistance Welding receiving electrode | |
| CN110977171B (en) | Vacuum laser-electric arc hybrid welding method and device for improving weld formation | |
| CN212311114U (en) | Special welding machine system for rapid metal forming by arc method | |
| CN211101602U (en) | Laser pre-cladding auxiliary plasma additive manufacturing equipment | |
| CN113547753A (en) | Laser welding method for plastic | |
| CN112676694A (en) | Method for solving welding depression of APM (advanced laser machining) car roof | |
| CN114654071B (en) | Friction stir welding method for filling hot wire after pre-slotting | |
| CN211331768U (en) | Welding spot positioning device | |
| CN220739810U (en) | Welding system of metal/CFRTP composite structure | |
| CN210237778U (en) | Multi-laser-source cladding welding device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |